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https://sourceware.org/git/binutils-gdb.git
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9dcbfff1e0
* read.c (do_repeat_with_expander): Use memmove instead of strcpy on unterminated string buffer.
6251 lines
149 KiB
C
6251 lines
149 KiB
C
/* read.c - read a source file -
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Copyright (C) 1986-2018 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
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But then, GNU isn't supposed to run on your machine anyway.
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(RMS is so shortsighted sometimes.) */
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#define MASK_CHAR ((int)(unsigned char) -1)
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/* This is the largest known floating point format (for now). It will
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grow when we do 4361 style flonums. */
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#define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
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/* Routines that read assembler source text to build spaghetti in memory.
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Another group of these functions is in the expr.c module. */
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#include "as.h"
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#include "safe-ctype.h"
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#include "subsegs.h"
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#include "sb.h"
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#include "macro.h"
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#include "obstack.h"
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#include "ecoff.h"
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#include "dw2gencfi.h"
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#include "wchar.h"
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#ifndef TC_START_LABEL
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#define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) (NEXT_CHAR == ':')
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#endif
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/* Set by the object-format or the target. */
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#ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
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#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
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do \
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{ \
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if ((SIZE) >= 8) \
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(P2VAR) = 3; \
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else if ((SIZE) >= 4) \
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(P2VAR) = 2; \
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else if ((SIZE) >= 2) \
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(P2VAR) = 1; \
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else \
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(P2VAR) = 0; \
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} \
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while (0)
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#endif
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char *input_line_pointer; /*->next char of source file to parse. */
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bfd_boolean input_from_string = FALSE;
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#if BITS_PER_CHAR != 8
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/* The following table is indexed by[(char)] and will break if
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a char does not have exactly 256 states (hopefully 0:255!)! */
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die horribly;
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#endif
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#ifndef LEX_AT
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#define LEX_AT 0
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#endif
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#ifndef LEX_BR
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/* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
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#define LEX_BR 0
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#endif
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#ifndef LEX_PCT
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/* The Delta 68k assembler permits % inside label names. */
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#define LEX_PCT 0
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#endif
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#ifndef LEX_QM
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/* The PowerPC Windows NT assemblers permits ? inside label names. */
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#define LEX_QM 0
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#endif
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#ifndef LEX_HASH
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/* The IA-64 assembler uses # as a suffix designating a symbol. We include
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it in the symbol and strip it out in tc_canonicalize_symbol_name. */
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#define LEX_HASH 0
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#endif
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#ifndef LEX_DOLLAR
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#define LEX_DOLLAR 3
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#endif
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#ifndef LEX_TILDE
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/* The Delta 68k assembler permits ~ at start of label names. */
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#define LEX_TILDE 0
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#endif
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/* Used by is_... macros. our ctype[]. */
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char lex_type[256] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
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0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
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LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
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0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
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};
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/* In: a character.
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Out: 1 if this character ends a line.
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2 if this character is a line separator. */
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char is_end_of_line[256] = {
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#ifdef CR_EOL
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1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
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#else
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1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
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#endif
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
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};
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#ifndef TC_CASE_SENSITIVE
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char original_case_string[128];
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#endif
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/* Functions private to this file. */
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static char *buffer; /* 1st char of each buffer of lines is here. */
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static char *buffer_limit; /*->1 + last char in buffer. */
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/* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
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in the tc-<CPU>.h file. See the "Porting GAS" section of the
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internals manual. */
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int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
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/* Variables for handling include file directory table. */
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/* Table of pointers to directories to search for .include's. */
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const char **include_dirs;
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/* How many are in the table. */
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int include_dir_count;
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/* Length of longest in table. */
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int include_dir_maxlen = 1;
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#ifndef WORKING_DOT_WORD
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struct broken_word *broken_words;
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int new_broken_words;
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#endif
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/* The current offset into the absolute section. We don't try to
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build frags in the absolute section, since no data can be stored
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there. We just keep track of the current offset. */
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addressT abs_section_offset;
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/* If this line had an MRI style label, it is stored in this variable.
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This is used by some of the MRI pseudo-ops. */
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symbolS *line_label;
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/* This global variable is used to support MRI common sections. We
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translate such sections into a common symbol. This variable is
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non-NULL when we are in an MRI common section. */
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symbolS *mri_common_symbol;
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/* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
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need to align to an even byte boundary unless the next pseudo-op is
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dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
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may be needed. */
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static int mri_pending_align;
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#ifndef NO_LISTING
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#ifdef OBJ_ELF
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/* This variable is set to be non-zero if the next string we see might
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be the name of the source file in DWARF debugging information. See
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the comment in emit_expr for the format we look for. */
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static int dwarf_file_string;
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#endif
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#endif
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/* If the target defines the md_frag_max_var hook then we know
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enough to implement the .bundle_align_mode features. */
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#ifdef md_frag_max_var
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# define HANDLE_BUNDLE
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#endif
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#ifdef HANDLE_BUNDLE
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/* .bundle_align_mode sets this. Normally it's zero. When nonzero,
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it's the exponent of the bundle size, and aligned instruction bundle
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mode is in effect. */
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static unsigned int bundle_align_p2;
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/* These are set by .bundle_lock and .bundle_unlock. .bundle_lock sets
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bundle_lock_frag to frag_now and then starts a new frag with
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frag_align_code. At the same time, bundle_lock_frain gets frchain_now,
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so that .bundle_unlock can verify that we didn't change segments.
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.bundle_unlock resets both to NULL. If we detect a bundling violation,
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then we reset bundle_lock_frchain to NULL as an indicator that we've
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already diagnosed the error with as_bad and don't need a cascade of
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redundant errors, but bundle_lock_frag remains set to indicate that
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we are expecting to see .bundle_unlock. */
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static fragS *bundle_lock_frag;
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static frchainS *bundle_lock_frchain;
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/* This is incremented by .bundle_lock and decremented by .bundle_unlock,
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to allow nesting. */
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static unsigned int bundle_lock_depth;
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#endif
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static void do_s_func (int end_p, const char *default_prefix);
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static void s_align (int, int);
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static void s_altmacro (int);
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static void s_bad_end (int);
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static void s_reloc (int);
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static int hex_float (int, char *);
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static segT get_known_segmented_expression (expressionS * expP);
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static void pobegin (void);
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static size_t get_non_macro_line_sb (sb *);
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static void generate_file_debug (void);
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static char *_find_end_of_line (char *, int, int, int);
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void
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read_begin (void)
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{
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const char *p;
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pobegin ();
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obj_read_begin_hook ();
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/* Something close -- but not too close -- to a multiple of 1024.
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The debugging malloc I'm using has 24 bytes of overhead. */
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obstack_begin (¬es, chunksize);
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obstack_begin (&cond_obstack, chunksize);
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#ifndef tc_line_separator_chars
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#define tc_line_separator_chars line_separator_chars
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#endif
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/* Use machine dependent syntax. */
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for (p = tc_line_separator_chars; *p; p++)
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is_end_of_line[(unsigned char) *p] = 2;
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/* Use more. FIXME-SOMEDAY. */
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if (flag_mri)
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lex_type['?'] = 3;
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}
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#ifndef TC_ADDRESS_BYTES
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#define TC_ADDRESS_BYTES address_bytes
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static inline int
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address_bytes (void)
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{
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/* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
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contain an address. */
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int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
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n |= n >> 1;
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n |= n >> 2;
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n += 1;
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return n;
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}
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#endif
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/* Set up pseudo-op tables. */
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static struct hash_control *po_hash;
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static const pseudo_typeS potable[] = {
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{"abort", s_abort, 0},
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{"align", s_align_ptwo, 0},
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{"altmacro", s_altmacro, 1},
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{"ascii", stringer, 8+0},
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{"asciz", stringer, 8+1},
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{"balign", s_align_bytes, 0},
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{"balignw", s_align_bytes, -2},
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{"balignl", s_align_bytes, -4},
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/* block */
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#ifdef HANDLE_BUNDLE
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{"bundle_align_mode", s_bundle_align_mode, 0},
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{"bundle_lock", s_bundle_lock, 0},
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{"bundle_unlock", s_bundle_unlock, 0},
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#endif
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{"byte", cons, 1},
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{"comm", s_comm, 0},
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{"common", s_mri_common, 0},
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{"common.s", s_mri_common, 1},
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{"data", s_data, 0},
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{"dc", cons, 2},
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#ifdef TC_ADDRESS_BYTES
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{"dc.a", cons, 0},
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#endif
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{"dc.b", cons, 1},
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{"dc.d", float_cons, 'd'},
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{"dc.l", cons, 4},
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{"dc.s", float_cons, 'f'},
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{"dc.w", cons, 2},
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{"dc.x", float_cons, 'x'},
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{"dcb", s_space, 2},
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{"dcb.b", s_space, 1},
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{"dcb.d", s_float_space, 'd'},
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{"dcb.l", s_space, 4},
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{"dcb.s", s_float_space, 'f'},
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||
{"dcb.w", s_space, 2},
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{"dcb.x", s_float_space, 'x'},
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{"ds", s_space, 2},
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{"ds.b", s_space, 1},
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{"ds.d", s_space, 8},
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{"ds.l", s_space, 4},
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{"ds.p", s_space, 12},
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{"ds.s", s_space, 4},
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{"ds.w", s_space, 2},
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{"ds.x", s_space, 12},
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{"debug", s_ignore, 0},
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||
#ifdef S_SET_DESC
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{"desc", s_desc, 0},
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||
#endif
|
||
/* dim */
|
||
{"double", float_cons, 'd'},
|
||
/* dsect */
|
||
{"eject", listing_eject, 0}, /* Formfeed listing. */
|
||
{"else", s_else, 0},
|
||
{"elsec", s_else, 0},
|
||
{"elseif", s_elseif, (int) O_ne},
|
||
{"end", s_end, 0},
|
||
{"endc", s_endif, 0},
|
||
{"endfunc", s_func, 1},
|
||
{"endif", s_endif, 0},
|
||
{"endm", s_bad_end, 0},
|
||
{"endr", s_bad_end, 1},
|
||
/* endef */
|
||
{"equ", s_set, 0},
|
||
{"equiv", s_set, 1},
|
||
{"eqv", s_set, -1},
|
||
{"err", s_err, 0},
|
||
{"error", s_errwarn, 1},
|
||
{"exitm", s_mexit, 0},
|
||
/* extend */
|
||
{"extern", s_ignore, 0}, /* We treat all undef as ext. */
|
||
{"appfile", s_app_file, 1},
|
||
{"appline", s_app_line, 1},
|
||
{"fail", s_fail, 0},
|
||
{"file", s_app_file, 0},
|
||
{"fill", s_fill, 0},
|
||
{"float", float_cons, 'f'},
|
||
{"format", s_ignore, 0},
|
||
{"func", s_func, 0},
|
||
{"global", s_globl, 0},
|
||
{"globl", s_globl, 0},
|
||
{"hword", cons, 2},
|
||
{"if", s_if, (int) O_ne},
|
||
{"ifb", s_ifb, 1},
|
||
{"ifc", s_ifc, 0},
|
||
{"ifdef", s_ifdef, 0},
|
||
{"ifeq", s_if, (int) O_eq},
|
||
{"ifeqs", s_ifeqs, 0},
|
||
{"ifge", s_if, (int) O_ge},
|
||
{"ifgt", s_if, (int) O_gt},
|
||
{"ifle", s_if, (int) O_le},
|
||
{"iflt", s_if, (int) O_lt},
|
||
{"ifnb", s_ifb, 0},
|
||
{"ifnc", s_ifc, 1},
|
||
{"ifndef", s_ifdef, 1},
|
||
{"ifne", s_if, (int) O_ne},
|
||
{"ifnes", s_ifeqs, 1},
|
||
{"ifnotdef", s_ifdef, 1},
|
||
{"incbin", s_incbin, 0},
|
||
{"include", s_include, 0},
|
||
{"int", cons, 4},
|
||
{"irp", s_irp, 0},
|
||
{"irep", s_irp, 0},
|
||
{"irpc", s_irp, 1},
|
||
{"irepc", s_irp, 1},
|
||
{"lcomm", s_lcomm, 0},
|
||
{"lflags", s_ignore, 0}, /* Listing flags. */
|
||
{"linefile", s_app_line, 0},
|
||
{"linkonce", s_linkonce, 0},
|
||
{"list", listing_list, 1}, /* Turn listing on. */
|
||
{"llen", listing_psize, 1},
|
||
{"long", cons, 4},
|
||
{"lsym", s_lsym, 0},
|
||
{"macro", s_macro, 0},
|
||
{"mexit", s_mexit, 0},
|
||
{"mri", s_mri, 0},
|
||
{".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
|
||
{"name", s_ignore, 0},
|
||
{"noaltmacro", s_altmacro, 0},
|
||
{"noformat", s_ignore, 0},
|
||
{"nolist", listing_list, 0}, /* Turn listing off. */
|
||
{"nopage", listing_nopage, 0},
|
||
{"nops", s_nops, 0},
|
||
{"octa", cons, 16},
|
||
{"offset", s_struct, 0},
|
||
{"org", s_org, 0},
|
||
{"p2align", s_align_ptwo, 0},
|
||
{"p2alignw", s_align_ptwo, -2},
|
||
{"p2alignl", s_align_ptwo, -4},
|
||
{"page", listing_eject, 0},
|
||
{"plen", listing_psize, 0},
|
||
{"print", s_print, 0},
|
||
{"psize", listing_psize, 0}, /* Set paper size. */
|
||
{"purgem", s_purgem, 0},
|
||
{"quad", cons, 8},
|
||
{"reloc", s_reloc, 0},
|
||
{"rep", s_rept, 0},
|
||
{"rept", s_rept, 0},
|
||
{"rva", s_rva, 4},
|
||
{"sbttl", listing_title, 1}, /* Subtitle of listing. */
|
||
/* scl */
|
||
/* sect */
|
||
{"set", s_set, 0},
|
||
{"short", cons, 2},
|
||
{"single", float_cons, 'f'},
|
||
/* size */
|
||
{"space", s_space, 0},
|
||
{"skip", s_space, 0},
|
||
{"sleb128", s_leb128, 1},
|
||
{"spc", s_ignore, 0},
|
||
{"stabd", s_stab, 'd'},
|
||
{"stabn", s_stab, 'n'},
|
||
{"stabs", s_stab, 's'},
|
||
{"string", stringer, 8+1},
|
||
{"string8", stringer, 8+1},
|
||
{"string16", stringer, 16+1},
|
||
{"string32", stringer, 32+1},
|
||
{"string64", stringer, 64+1},
|
||
{"struct", s_struct, 0},
|
||
/* tag */
|
||
{"text", s_text, 0},
|
||
|
||
/* This is for gcc to use. It's only just been added (2/94), so gcc
|
||
won't be able to use it for a while -- probably a year or more.
|
||
But once this has been released, check with gcc maintainers
|
||
before deleting it or even changing the spelling. */
|
||
{"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
|
||
/* If we're folding case -- done for some targets, not necessarily
|
||
all -- the above string in an input file will be converted to
|
||
this one. Match it either way... */
|
||
{"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
|
||
|
||
{"title", listing_title, 0}, /* Listing title. */
|
||
{"ttl", listing_title, 0},
|
||
/* type */
|
||
{"uleb128", s_leb128, 0},
|
||
/* use */
|
||
/* val */
|
||
{"xcom", s_comm, 0},
|
||
{"xdef", s_globl, 0},
|
||
{"xref", s_ignore, 0},
|
||
{"xstabs", s_xstab, 's'},
|
||
{"warning", s_errwarn, 0},
|
||
{"weakref", s_weakref, 0},
|
||
{"word", cons, 2},
|
||
{"zero", s_space, 0},
|
||
{NULL, NULL, 0} /* End sentinel. */
|
||
};
|
||
|
||
static offsetT
|
||
get_absolute_expr (expressionS *exp)
|
||
{
|
||
expression_and_evaluate (exp);
|
||
|
||
if (exp->X_op != O_constant)
|
||
{
|
||
if (exp->X_op != O_absent)
|
||
as_bad (_("bad or irreducible absolute expression"));
|
||
exp->X_add_number = 0;
|
||
}
|
||
return exp->X_add_number;
|
||
}
|
||
|
||
offsetT
|
||
get_absolute_expression (void)
|
||
{
|
||
expressionS exp;
|
||
|
||
return get_absolute_expr (&exp);
|
||
}
|
||
|
||
static int pop_override_ok = 0;
|
||
static const char *pop_table_name;
|
||
|
||
void
|
||
pop_insert (const pseudo_typeS *table)
|
||
{
|
||
const char *errtxt;
|
||
const pseudo_typeS *pop;
|
||
for (pop = table; pop->poc_name; pop++)
|
||
{
|
||
errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
|
||
if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
|
||
as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
|
||
errtxt);
|
||
}
|
||
}
|
||
|
||
#ifndef md_pop_insert
|
||
#define md_pop_insert() pop_insert(md_pseudo_table)
|
||
#endif
|
||
|
||
#ifndef obj_pop_insert
|
||
#define obj_pop_insert() pop_insert(obj_pseudo_table)
|
||
#endif
|
||
|
||
#ifndef cfi_pop_insert
|
||
#define cfi_pop_insert() pop_insert(cfi_pseudo_table)
|
||
#endif
|
||
|
||
static void
|
||
pobegin (void)
|
||
{
|
||
po_hash = hash_new ();
|
||
|
||
/* Do the target-specific pseudo ops. */
|
||
pop_table_name = "md";
|
||
md_pop_insert ();
|
||
|
||
/* Now object specific. Skip any that were in the target table. */
|
||
pop_table_name = "obj";
|
||
pop_override_ok = 1;
|
||
obj_pop_insert ();
|
||
|
||
/* Now portable ones. Skip any that we've seen already. */
|
||
pop_table_name = "standard";
|
||
pop_insert (potable);
|
||
|
||
/* Now CFI ones. */
|
||
pop_table_name = "cfi";
|
||
pop_override_ok = 1;
|
||
cfi_pop_insert ();
|
||
}
|
||
|
||
#define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \
|
||
if (ignore_input ()) \
|
||
{ \
|
||
char *eol = find_end_of_line (input_line_pointer - (num_read), \
|
||
flag_m68k_mri); \
|
||
input_line_pointer = (input_line_pointer <= buffer_limit \
|
||
&& eol >= buffer_limit) \
|
||
? buffer_limit \
|
||
: eol + 1; \
|
||
continue; \
|
||
}
|
||
|
||
/* This function is used when scrubbing the characters between #APP
|
||
and #NO_APP. */
|
||
|
||
static char *scrub_string;
|
||
static char *scrub_string_end;
|
||
|
||
static size_t
|
||
scrub_from_string (char *buf, size_t buflen)
|
||
{
|
||
size_t copy;
|
||
|
||
copy = scrub_string_end - scrub_string;
|
||
if (copy > buflen)
|
||
copy = buflen;
|
||
memcpy (buf, scrub_string, copy);
|
||
scrub_string += copy;
|
||
return copy;
|
||
}
|
||
|
||
/* Helper function of read_a_source_file, which tries to expand a macro. */
|
||
static int
|
||
try_macro (char term, const char *line)
|
||
{
|
||
sb out;
|
||
const char *err;
|
||
macro_entry *macro;
|
||
|
||
if (check_macro (line, &out, &err, ¯o))
|
||
{
|
||
if (err != NULL)
|
||
as_bad ("%s", err);
|
||
*input_line_pointer++ = term;
|
||
input_scrub_include_sb (&out,
|
||
input_line_pointer, 1);
|
||
sb_kill (&out);
|
||
buffer_limit =
|
||
input_scrub_next_buffer (&input_line_pointer);
|
||
#ifdef md_macro_info
|
||
md_macro_info (macro);
|
||
#endif
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
#ifdef HANDLE_BUNDLE
|
||
/* Start a new instruction bundle. Returns the rs_align_code frag that
|
||
will be used to align the new bundle. */
|
||
static fragS *
|
||
start_bundle (void)
|
||
{
|
||
fragS *frag = frag_now;
|
||
|
||
frag_align_code (0, 0);
|
||
|
||
while (frag->fr_type != rs_align_code)
|
||
frag = frag->fr_next;
|
||
|
||
gas_assert (frag != frag_now);
|
||
|
||
return frag;
|
||
}
|
||
|
||
/* Calculate the maximum size after relaxation of the region starting
|
||
at the given frag and extending through frag_now (which is unfinished). */
|
||
static unsigned int
|
||
pending_bundle_size (fragS *frag)
|
||
{
|
||
unsigned int offset = frag->fr_fix;
|
||
unsigned int size = 0;
|
||
|
||
gas_assert (frag != frag_now);
|
||
gas_assert (frag->fr_type == rs_align_code);
|
||
|
||
while (frag != frag_now)
|
||
{
|
||
/* This should only happen in what will later become an error case. */
|
||
if (frag == NULL)
|
||
return 0;
|
||
|
||
size += frag->fr_fix;
|
||
if (frag->fr_type == rs_machine_dependent)
|
||
size += md_frag_max_var (frag);
|
||
|
||
frag = frag->fr_next;
|
||
}
|
||
|
||
gas_assert (frag == frag_now);
|
||
size += frag_now_fix ();
|
||
if (frag->fr_type == rs_machine_dependent)
|
||
size += md_frag_max_var (frag);
|
||
|
||
gas_assert (size >= offset);
|
||
|
||
return size - offset;
|
||
}
|
||
|
||
/* Finish off the frag created to ensure bundle alignment. */
|
||
static void
|
||
finish_bundle (fragS *frag, unsigned int size)
|
||
{
|
||
gas_assert (bundle_align_p2 > 0);
|
||
gas_assert (frag->fr_type == rs_align_code);
|
||
|
||
if (size > 1)
|
||
{
|
||
/* If there is more than a single byte, then we need to set up the
|
||
alignment frag. Otherwise we leave it at its initial state from
|
||
calling frag_align_code (0, 0), so that it does nothing. */
|
||
frag->fr_offset = bundle_align_p2;
|
||
frag->fr_subtype = size - 1;
|
||
}
|
||
|
||
/* We do this every time rather than just in s_bundle_align_mode
|
||
so that we catch any affected section without needing hooks all
|
||
over for all paths that do section changes. It's cheap enough. */
|
||
if (bundle_align_p2 > OCTETS_PER_BYTE_POWER)
|
||
record_alignment (now_seg, bundle_align_p2 - OCTETS_PER_BYTE_POWER);
|
||
}
|
||
|
||
/* Assemble one instruction. This takes care of the bundle features
|
||
around calling md_assemble. */
|
||
static void
|
||
assemble_one (char *line)
|
||
{
|
||
fragS *insn_start_frag = NULL;
|
||
|
||
if (bundle_lock_frchain != NULL && bundle_lock_frchain != frchain_now)
|
||
{
|
||
as_bad (_("cannot change section or subsection inside .bundle_lock"));
|
||
/* Clearing this serves as a marker that we have already complained. */
|
||
bundle_lock_frchain = NULL;
|
||
}
|
||
|
||
if (bundle_lock_frchain == NULL && bundle_align_p2 > 0)
|
||
insn_start_frag = start_bundle ();
|
||
|
||
md_assemble (line);
|
||
|
||
if (bundle_lock_frchain != NULL)
|
||
{
|
||
/* Make sure this hasn't pushed the locked sequence
|
||
past the bundle size. */
|
||
unsigned int bundle_size = pending_bundle_size (bundle_lock_frag);
|
||
if (bundle_size > 1U << bundle_align_p2)
|
||
as_bad (_ (".bundle_lock sequence at %u bytes, "
|
||
"but .bundle_align_mode limit is %u bytes"),
|
||
bundle_size, 1U << bundle_align_p2);
|
||
}
|
||
else if (bundle_align_p2 > 0)
|
||
{
|
||
unsigned int insn_size = pending_bundle_size (insn_start_frag);
|
||
|
||
if (insn_size > 1U << bundle_align_p2)
|
||
as_bad (_("single instruction is %u bytes long, "
|
||
"but .bundle_align_mode limit is %u bytes"),
|
||
insn_size, 1U << bundle_align_p2);
|
||
|
||
finish_bundle (insn_start_frag, insn_size);
|
||
}
|
||
}
|
||
|
||
#else /* !HANDLE_BUNDLE */
|
||
|
||
# define assemble_one(line) md_assemble(line)
|
||
|
||
#endif /* HANDLE_BUNDLE */
|
||
|
||
static bfd_boolean
|
||
in_bss (void)
|
||
{
|
||
flagword flags = bfd_get_section_flags (stdoutput, now_seg);
|
||
|
||
return (flags & SEC_ALLOC) && !(flags & (SEC_LOAD | SEC_HAS_CONTENTS));
|
||
}
|
||
|
||
/* Guts of .align directive:
|
||
N is the power of two to which to align. A value of zero is accepted but
|
||
ignored: the default alignment of the section will be at least this.
|
||
FILL may be NULL, or it may point to the bytes of the fill pattern.
|
||
LEN is the length of whatever FILL points to, if anything. If LEN is zero
|
||
but FILL is not NULL then LEN is treated as if it were one.
|
||
MAX is the maximum number of characters to skip when doing the alignment,
|
||
or 0 if there is no maximum. */
|
||
|
||
void
|
||
do_align (unsigned int n, char *fill, unsigned int len, unsigned int max)
|
||
{
|
||
if (now_seg == absolute_section || in_bss ())
|
||
{
|
||
if (fill != NULL)
|
||
while (len-- > 0)
|
||
if (*fill++ != '\0')
|
||
{
|
||
if (now_seg == absolute_section)
|
||
as_warn (_("ignoring fill value in absolute section"));
|
||
else
|
||
as_warn (_("ignoring fill value in section `%s'"),
|
||
segment_name (now_seg));
|
||
break;
|
||
}
|
||
fill = NULL;
|
||
len = 0;
|
||
}
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_do_align
|
||
md_do_align (n, fill, len, max, just_record_alignment);
|
||
#endif
|
||
|
||
/* Only make a frag if we HAVE to... */
|
||
if ((n > OCTETS_PER_BYTE_POWER) && !need_pass_2)
|
||
{
|
||
if (fill == NULL)
|
||
{
|
||
if (subseg_text_p (now_seg))
|
||
frag_align_code (n, max);
|
||
else
|
||
frag_align (n, 0, max);
|
||
}
|
||
else if (len <= 1)
|
||
frag_align (n, *fill, max);
|
||
else
|
||
frag_align_pattern (n, fill, len, max);
|
||
}
|
||
|
||
#ifdef md_do_align
|
||
just_record_alignment: ATTRIBUTE_UNUSED_LABEL
|
||
#endif
|
||
|
||
if (n > OCTETS_PER_BYTE_POWER)
|
||
record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
|
||
}
|
||
|
||
/* We read the file, putting things into a web that represents what we
|
||
have been reading. */
|
||
void
|
||
read_a_source_file (const char *name)
|
||
{
|
||
char nul_char;
|
||
char next_char;
|
||
char *s; /* String of symbol, '\0' appended. */
|
||
int temp;
|
||
pseudo_typeS *pop;
|
||
|
||
#ifdef WARN_COMMENTS
|
||
found_comment = 0;
|
||
#endif
|
||
|
||
buffer = input_scrub_new_file (name);
|
||
|
||
listing_file (name);
|
||
listing_newline (NULL);
|
||
register_dependency (name);
|
||
|
||
/* Generate debugging information before we've read anything in to denote
|
||
this file as the "main" source file and not a subordinate one
|
||
(e.g. N_SO vs N_SOL in stabs). */
|
||
generate_file_debug ();
|
||
|
||
while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
|
||
{ /* We have another line to parse. */
|
||
#ifndef NO_LISTING
|
||
/* In order to avoid listing macro expansion lines with labels
|
||
multiple times, keep track of which line was last issued. */
|
||
static char *last_eol;
|
||
|
||
last_eol = NULL;
|
||
#endif
|
||
while (input_line_pointer < buffer_limit)
|
||
{
|
||
bfd_boolean was_new_line;
|
||
/* We have more of this buffer to parse. */
|
||
|
||
/* We now have input_line_pointer->1st char of next line.
|
||
If input_line_pointer [-1] == '\n' then we just
|
||
scanned another line: so bump line counters. */
|
||
was_new_line = is_end_of_line[(unsigned char) input_line_pointer[-1]];
|
||
if (was_new_line)
|
||
{
|
||
symbol_set_value_now (&dot_symbol);
|
||
#ifdef md_start_line_hook
|
||
md_start_line_hook ();
|
||
#endif
|
||
if (input_line_pointer[-1] == '\n')
|
||
bump_line_counters ();
|
||
}
|
||
|
||
#ifndef NO_LISTING
|
||
/* If listing is on, and we are expanding a macro, then give
|
||
the listing code the contents of the expanded line. */
|
||
if (listing)
|
||
{
|
||
if ((listing & LISTING_MACEXP) && macro_nest > 0)
|
||
{
|
||
/* Find the end of the current expanded macro line. */
|
||
s = find_end_of_line (input_line_pointer, flag_m68k_mri);
|
||
|
||
if (s != last_eol)
|
||
{
|
||
char *copy;
|
||
int len;
|
||
|
||
last_eol = s;
|
||
/* Copy it for safe keeping. Also give an indication of
|
||
how much macro nesting is involved at this point. */
|
||
len = s - input_line_pointer;
|
||
copy = XNEWVEC (char, len + macro_nest + 2);
|
||
memset (copy, '>', macro_nest);
|
||
copy[macro_nest] = ' ';
|
||
memcpy (copy + macro_nest + 1, input_line_pointer, len);
|
||
copy[macro_nest + 1 + len] = '\0';
|
||
|
||
/* Install the line with the listing facility. */
|
||
listing_newline (copy);
|
||
}
|
||
}
|
||
else
|
||
listing_newline (NULL);
|
||
}
|
||
#endif
|
||
if (was_new_line)
|
||
{
|
||
line_label = NULL;
|
||
|
||
if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
|
||
{
|
||
next_char = * input_line_pointer;
|
||
/* Text at the start of a line must be a label, we
|
||
run down and stick a colon in. */
|
||
if (is_name_beginner (next_char) || next_char == '"')
|
||
{
|
||
char *line_start;
|
||
int mri_line_macro;
|
||
|
||
HANDLE_CONDITIONAL_ASSEMBLY (0);
|
||
|
||
nul_char = get_symbol_name (& line_start);
|
||
next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
|
||
|
||
/* In MRI mode, the EQU and MACRO pseudoops must
|
||
be handled specially. */
|
||
mri_line_macro = 0;
|
||
if (flag_m68k_mri)
|
||
{
|
||
char *rest = input_line_pointer + 1;
|
||
|
||
if (*rest == ':')
|
||
++rest;
|
||
if (*rest == ' ' || *rest == '\t')
|
||
++rest;
|
||
if ((strncasecmp (rest, "EQU", 3) == 0
|
||
|| strncasecmp (rest, "SET", 3) == 0)
|
||
&& (rest[3] == ' ' || rest[3] == '\t'))
|
||
{
|
||
input_line_pointer = rest + 3;
|
||
equals (line_start,
|
||
strncasecmp (rest, "SET", 3) == 0);
|
||
continue;
|
||
}
|
||
if (strncasecmp (rest, "MACRO", 5) == 0
|
||
&& (rest[5] == ' '
|
||
|| rest[5] == '\t'
|
||
|| is_end_of_line[(unsigned char) rest[5]]))
|
||
mri_line_macro = 1;
|
||
}
|
||
|
||
/* In MRI mode, we need to handle the MACRO
|
||
pseudo-op specially: we don't want to put the
|
||
symbol in the symbol table. */
|
||
if (!mri_line_macro
|
||
#ifdef TC_START_LABEL_WITHOUT_COLON
|
||
&& TC_START_LABEL_WITHOUT_COLON (nul_char, next_char)
|
||
#endif
|
||
)
|
||
line_label = colon (line_start);
|
||
else
|
||
line_label = symbol_create (line_start,
|
||
absolute_section,
|
||
(valueT) 0,
|
||
&zero_address_frag);
|
||
|
||
next_char = restore_line_pointer (nul_char);
|
||
if (next_char == ':')
|
||
input_line_pointer++;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We are at the beginning of a line, or similar place.
|
||
We expect a well-formed assembler statement.
|
||
A "symbol-name:" is a statement.
|
||
|
||
Depending on what compiler is used, the order of these tests
|
||
may vary to catch most common case 1st.
|
||
Each test is independent of all other tests at the (top)
|
||
level. */
|
||
do
|
||
nul_char = next_char = *input_line_pointer++;
|
||
while (next_char == '\t' || next_char == ' ' || next_char == '\f');
|
||
|
||
/* C is the 1st significant character.
|
||
Input_line_pointer points after that character. */
|
||
if (is_name_beginner (next_char) || next_char == '"')
|
||
{
|
||
char *rest;
|
||
|
||
/* Want user-defined label or pseudo/opcode. */
|
||
HANDLE_CONDITIONAL_ASSEMBLY (1);
|
||
|
||
--input_line_pointer;
|
||
nul_char = get_symbol_name (& s); /* name's delimiter. */
|
||
next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
|
||
rest = input_line_pointer + (nul_char == '"' ? 2 : 1);
|
||
|
||
/* NEXT_CHAR is character after symbol.
|
||
The end of symbol in the input line is now '\0'.
|
||
S points to the beginning of the symbol.
|
||
[In case of pseudo-op, s->'.'.]
|
||
Input_line_pointer->'\0' where NUL_CHAR was. */
|
||
if (TC_START_LABEL (s, nul_char, next_char))
|
||
{
|
||
if (flag_m68k_mri)
|
||
{
|
||
/* In MRI mode, \tsym: set 0 is permitted. */
|
||
if (*rest == ':')
|
||
++rest;
|
||
|
||
if (*rest == ' ' || *rest == '\t')
|
||
++rest;
|
||
|
||
if ((strncasecmp (rest, "EQU", 3) == 0
|
||
|| strncasecmp (rest, "SET", 3) == 0)
|
||
&& (rest[3] == ' ' || rest[3] == '\t'))
|
||
{
|
||
input_line_pointer = rest + 3;
|
||
equals (s, 1);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
line_label = colon (s); /* User-defined label. */
|
||
restore_line_pointer (nul_char);
|
||
++ input_line_pointer;
|
||
#ifdef tc_check_label
|
||
tc_check_label (line_label);
|
||
#endif
|
||
/* Input_line_pointer->after ':'. */
|
||
SKIP_WHITESPACE ();
|
||
}
|
||
else if ((next_char == '=' && *rest == '=')
|
||
|| ((next_char == ' ' || next_char == '\t')
|
||
&& rest[0] == '='
|
||
&& rest[1] == '='))
|
||
{
|
||
equals (s, -1);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
else if ((next_char == '='
|
||
|| ((next_char == ' ' || next_char == '\t')
|
||
&& *rest == '='))
|
||
#ifdef TC_EQUAL_IN_INSN
|
||
&& !TC_EQUAL_IN_INSN (next_char, s)
|
||
#endif
|
||
)
|
||
{
|
||
equals (s, 1);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
else
|
||
{
|
||
/* Expect pseudo-op or machine instruction. */
|
||
pop = NULL;
|
||
|
||
#ifndef TC_CASE_SENSITIVE
|
||
{
|
||
char *s2 = s;
|
||
|
||
strncpy (original_case_string, s2, sizeof (original_case_string));
|
||
original_case_string[sizeof (original_case_string) - 1] = 0;
|
||
|
||
while (*s2)
|
||
{
|
||
*s2 = TOLOWER (*s2);
|
||
s2++;
|
||
}
|
||
}
|
||
#endif
|
||
if (NO_PSEUDO_DOT || flag_m68k_mri)
|
||
{
|
||
/* The MRI assembler uses pseudo-ops without
|
||
a period. */
|
||
pop = (pseudo_typeS *) hash_find (po_hash, s);
|
||
if (pop != NULL && pop->poc_handler == NULL)
|
||
pop = NULL;
|
||
}
|
||
|
||
if (pop != NULL
|
||
|| (!flag_m68k_mri && *s == '.'))
|
||
{
|
||
/* PSEUDO - OP.
|
||
|
||
WARNING: next_char may be end-of-line.
|
||
We lookup the pseudo-op table with s+1 because we
|
||
already know that the pseudo-op begins with a '.'. */
|
||
|
||
if (pop == NULL)
|
||
pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
|
||
if (pop && !pop->poc_handler)
|
||
pop = NULL;
|
||
|
||
/* In MRI mode, we may need to insert an
|
||
automatic alignment directive. What a hack
|
||
this is. */
|
||
if (mri_pending_align
|
||
&& (pop == NULL
|
||
|| !((pop->poc_handler == cons
|
||
&& pop->poc_val == 1)
|
||
|| (pop->poc_handler == s_space
|
||
&& pop->poc_val == 1)
|
||
#ifdef tc_conditional_pseudoop
|
||
|| tc_conditional_pseudoop (pop)
|
||
#endif
|
||
|| pop->poc_handler == s_if
|
||
|| pop->poc_handler == s_ifdef
|
||
|| pop->poc_handler == s_ifc
|
||
|| pop->poc_handler == s_ifeqs
|
||
|| pop->poc_handler == s_else
|
||
|| pop->poc_handler == s_endif
|
||
|| pop->poc_handler == s_globl
|
||
|| pop->poc_handler == s_ignore)))
|
||
{
|
||
do_align (1, (char *) NULL, 0, 0);
|
||
mri_pending_align = 0;
|
||
|
||
if (line_label != NULL)
|
||
{
|
||
symbol_set_frag (line_label, frag_now);
|
||
S_SET_VALUE (line_label, frag_now_fix ());
|
||
}
|
||
}
|
||
|
||
/* Print the error msg now, while we still can. */
|
||
if (pop == NULL)
|
||
{
|
||
char *end = input_line_pointer;
|
||
|
||
(void) restore_line_pointer (nul_char);
|
||
s_ignore (0);
|
||
nul_char = next_char = *--input_line_pointer;
|
||
*input_line_pointer = '\0';
|
||
if (! macro_defined || ! try_macro (next_char, s))
|
||
{
|
||
*end = '\0';
|
||
as_bad (_("unknown pseudo-op: `%s'"), s);
|
||
*input_line_pointer++ = nul_char;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
/* Put it back for error messages etc. */
|
||
next_char = restore_line_pointer (nul_char);
|
||
/* The following skip of whitespace is compulsory.
|
||
A well shaped space is sometimes all that separates
|
||
keyword from operands. */
|
||
if (next_char == ' ' || next_char == '\t')
|
||
input_line_pointer++;
|
||
|
||
/* Input_line is restored.
|
||
Input_line_pointer->1st non-blank char
|
||
after pseudo-operation. */
|
||
(*pop->poc_handler) (pop->poc_val);
|
||
|
||
/* If that was .end, just get out now. */
|
||
if (pop->poc_handler == s_end)
|
||
goto quit;
|
||
}
|
||
else
|
||
{
|
||
/* WARNING: next_char may be end-of-line. */
|
||
/* Also: input_line_pointer->`\0` where nul_char was. */
|
||
(void) restore_line_pointer (nul_char);
|
||
input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
|
||
next_char = nul_char = *input_line_pointer;
|
||
*input_line_pointer = '\0';
|
||
|
||
generate_lineno_debug ();
|
||
|
||
if (macro_defined && try_macro (next_char, s))
|
||
continue;
|
||
|
||
if (mri_pending_align)
|
||
{
|
||
do_align (1, (char *) NULL, 0, 0);
|
||
mri_pending_align = 0;
|
||
if (line_label != NULL)
|
||
{
|
||
symbol_set_frag (line_label, frag_now);
|
||
S_SET_VALUE (line_label, frag_now_fix ());
|
||
}
|
||
}
|
||
|
||
assemble_one (s); /* Assemble 1 instruction. */
|
||
|
||
/* PR 19630: The backend may have set ilp to NULL
|
||
if it encountered a catastrophic failure. */
|
||
if (input_line_pointer == NULL)
|
||
as_fatal (_("unable to continue with assembly."));
|
||
|
||
*input_line_pointer++ = nul_char;
|
||
|
||
/* We resume loop AFTER the end-of-line from
|
||
this instruction. */
|
||
}
|
||
}
|
||
continue;
|
||
}
|
||
|
||
/* Empty statement? */
|
||
if (is_end_of_line[(unsigned char) next_char])
|
||
continue;
|
||
|
||
if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (next_char))
|
||
{
|
||
/* local label ("4:") */
|
||
char *backup = input_line_pointer;
|
||
|
||
HANDLE_CONDITIONAL_ASSEMBLY (1);
|
||
|
||
temp = next_char - '0';
|
||
|
||
if (nul_char == '"')
|
||
++ input_line_pointer;
|
||
|
||
/* Read the whole number. */
|
||
while (ISDIGIT (*input_line_pointer))
|
||
{
|
||
temp = (temp * 10) + *input_line_pointer - '0';
|
||
++input_line_pointer;
|
||
}
|
||
|
||
if (LOCAL_LABELS_DOLLAR
|
||
&& *input_line_pointer == '$'
|
||
&& *(input_line_pointer + 1) == ':')
|
||
{
|
||
input_line_pointer += 2;
|
||
|
||
if (dollar_label_defined (temp))
|
||
{
|
||
as_fatal (_("label \"%d$\" redefined"), temp);
|
||
}
|
||
|
||
define_dollar_label (temp);
|
||
colon (dollar_label_name (temp, 0));
|
||
continue;
|
||
}
|
||
|
||
if (LOCAL_LABELS_FB
|
||
&& *input_line_pointer++ == ':')
|
||
{
|
||
fb_label_instance_inc (temp);
|
||
colon (fb_label_name (temp, 0));
|
||
continue;
|
||
}
|
||
|
||
input_line_pointer = backup;
|
||
}
|
||
|
||
if (next_char && strchr (line_comment_chars, next_char))
|
||
{ /* Its a comment. Better say APP or NO_APP. */
|
||
sb sbuf;
|
||
char *ends;
|
||
char *new_buf;
|
||
char *new_tmp;
|
||
unsigned int new_length;
|
||
char *tmp_buf = 0;
|
||
|
||
s = input_line_pointer;
|
||
if (strncmp (s, "APP\n", 4))
|
||
{
|
||
/* We ignore it. */
|
||
ignore_rest_of_line ();
|
||
continue;
|
||
}
|
||
bump_line_counters ();
|
||
s += 4;
|
||
|
||
ends = strstr (s, "#NO_APP\n");
|
||
|
||
if (!ends)
|
||
{
|
||
unsigned int tmp_len;
|
||
unsigned int num;
|
||
|
||
/* The end of the #APP wasn't in this buffer. We
|
||
keep reading in buffers until we find the #NO_APP
|
||
that goes with this #APP There is one. The specs
|
||
guarantee it... */
|
||
tmp_len = buffer_limit - s;
|
||
tmp_buf = XNEWVEC (char, tmp_len + 1);
|
||
memcpy (tmp_buf, s, tmp_len);
|
||
do
|
||
{
|
||
new_tmp = input_scrub_next_buffer (&buffer);
|
||
if (!new_tmp)
|
||
break;
|
||
else
|
||
buffer_limit = new_tmp;
|
||
input_line_pointer = buffer;
|
||
ends = strstr (buffer, "#NO_APP\n");
|
||
if (ends)
|
||
num = ends - buffer;
|
||
else
|
||
num = buffer_limit - buffer;
|
||
|
||
tmp_buf = XRESIZEVEC (char, tmp_buf, tmp_len + num);
|
||
memcpy (tmp_buf + tmp_len, buffer, num);
|
||
tmp_len += num;
|
||
}
|
||
while (!ends);
|
||
|
||
input_line_pointer = ends ? ends + 8 : NULL;
|
||
|
||
s = tmp_buf;
|
||
ends = s + tmp_len;
|
||
|
||
}
|
||
else
|
||
{
|
||
input_line_pointer = ends + 8;
|
||
}
|
||
|
||
scrub_string = s;
|
||
scrub_string_end = ends;
|
||
|
||
new_length = ends - s;
|
||
new_buf = XNEWVEC (char, new_length);
|
||
new_tmp = new_buf;
|
||
for (;;)
|
||
{
|
||
size_t space;
|
||
size_t size;
|
||
|
||
space = (new_buf + new_length) - new_tmp;
|
||
size = do_scrub_chars (scrub_from_string, new_tmp, space);
|
||
|
||
if (size < space)
|
||
{
|
||
new_tmp[size] = 0;
|
||
break;
|
||
}
|
||
|
||
new_buf = XRESIZEVEC (char, new_buf, new_length + 100);
|
||
new_tmp = new_buf + new_length;
|
||
new_length += 100;
|
||
}
|
||
|
||
if (tmp_buf)
|
||
free (tmp_buf);
|
||
|
||
/* We've "scrubbed" input to the preferred format. In the
|
||
process we may have consumed the whole of the remaining
|
||
file (and included files). We handle this formatted
|
||
input similar to that of macro expansion, letting
|
||
actual macro expansion (possibly nested) and other
|
||
input expansion work. Beware that in messages, line
|
||
numbers and possibly file names will be incorrect. */
|
||
new_length = strlen (new_buf);
|
||
sb_build (&sbuf, new_length);
|
||
sb_add_buffer (&sbuf, new_buf, new_length);
|
||
input_scrub_include_sb (&sbuf, input_line_pointer, 0);
|
||
sb_kill (&sbuf);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
free (new_buf);
|
||
continue;
|
||
}
|
||
|
||
HANDLE_CONDITIONAL_ASSEMBLY (1);
|
||
|
||
#ifdef tc_unrecognized_line
|
||
if (tc_unrecognized_line (next_char))
|
||
continue;
|
||
#endif
|
||
input_line_pointer--;
|
||
/* Report unknown char as error. */
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
}
|
||
|
||
quit:
|
||
symbol_set_value_now (&dot_symbol);
|
||
|
||
#ifdef HANDLE_BUNDLE
|
||
if (bundle_lock_frag != NULL)
|
||
{
|
||
as_bad_where (bundle_lock_frag->fr_file, bundle_lock_frag->fr_line,
|
||
_(".bundle_lock with no matching .bundle_unlock"));
|
||
bundle_lock_frag = NULL;
|
||
bundle_lock_frchain = NULL;
|
||
bundle_lock_depth = 0;
|
||
}
|
||
#endif
|
||
|
||
#ifdef md_cleanup
|
||
md_cleanup ();
|
||
#endif
|
||
/* Close the input file. */
|
||
input_scrub_close ();
|
||
#ifdef WARN_COMMENTS
|
||
{
|
||
if (warn_comment && found_comment)
|
||
as_warn_where (found_comment_file, found_comment,
|
||
"first comment found here");
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Convert O_constant expression EXP into the equivalent O_big representation.
|
||
Take the sign of the number from SIGN rather than X_add_number. */
|
||
|
||
static void
|
||
convert_to_bignum (expressionS *exp, int sign)
|
||
{
|
||
valueT value;
|
||
unsigned int i;
|
||
|
||
value = exp->X_add_number;
|
||
for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
|
||
{
|
||
generic_bignum[i] = value & LITTLENUM_MASK;
|
||
value >>= LITTLENUM_NUMBER_OF_BITS;
|
||
}
|
||
/* Add a sequence of sign bits if the top bit of X_add_number is not
|
||
the sign of the original value. */
|
||
if ((exp->X_add_number < 0) == !sign)
|
||
generic_bignum[i++] = sign ? LITTLENUM_MASK : 0;
|
||
exp->X_op = O_big;
|
||
exp->X_add_number = i;
|
||
}
|
||
|
||
/* For most MRI pseudo-ops, the line actually ends at the first
|
||
nonquoted space. This function looks for that point, stuffs a null
|
||
in, and sets *STOPCP to the character that used to be there, and
|
||
returns the location.
|
||
|
||
Until I hear otherwise, I am going to assume that this is only true
|
||
for the m68k MRI assembler. */
|
||
|
||
char *
|
||
mri_comment_field (char *stopcp)
|
||
{
|
||
char *s;
|
||
#ifdef TC_M68K
|
||
int inquote = 0;
|
||
|
||
know (flag_m68k_mri);
|
||
|
||
for (s = input_line_pointer;
|
||
((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
|
||
|| inquote);
|
||
s++)
|
||
{
|
||
if (*s == '\'')
|
||
inquote = !inquote;
|
||
}
|
||
#else
|
||
for (s = input_line_pointer;
|
||
!is_end_of_line[(unsigned char) *s];
|
||
s++)
|
||
;
|
||
#endif
|
||
*stopcp = *s;
|
||
*s = '\0';
|
||
|
||
return s;
|
||
}
|
||
|
||
/* Skip to the end of an MRI comment field. */
|
||
|
||
void
|
||
mri_comment_end (char *stop, int stopc)
|
||
{
|
||
know (flag_mri);
|
||
|
||
input_line_pointer = stop;
|
||
*stop = stopc;
|
||
while (!is_end_of_line[(unsigned char) *input_line_pointer])
|
||
++input_line_pointer;
|
||
}
|
||
|
||
void
|
||
s_abort (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
as_fatal (_(".abort detected. Abandoning ship."));
|
||
}
|
||
|
||
/* Handle the .align pseudo-op. A positive ARG is a default alignment
|
||
(in bytes). A negative ARG is the negative of the length of the
|
||
fill pattern. BYTES_P is non-zero if the alignment value should be
|
||
interpreted as the byte boundary, rather than the power of 2. */
|
||
#ifndef TC_ALIGN_LIMIT
|
||
#define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
|
||
#endif
|
||
|
||
static void
|
||
s_align (signed int arg, int bytes_p)
|
||
{
|
||
unsigned int align_limit = TC_ALIGN_LIMIT;
|
||
unsigned int align;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
offsetT fill = 0;
|
||
unsigned int max;
|
||
int fill_p;
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
if (is_end_of_line[(unsigned char) *input_line_pointer])
|
||
{
|
||
if (arg < 0)
|
||
align = 0;
|
||
else
|
||
align = arg; /* Default value from pseudo-op table. */
|
||
}
|
||
else
|
||
{
|
||
align = get_absolute_expression ();
|
||
SKIP_WHITESPACE ();
|
||
|
||
#ifdef TC_ALIGN_ZERO_IS_DEFAULT
|
||
if (arg > 0 && align == 0)
|
||
align = arg;
|
||
#endif
|
||
}
|
||
|
||
if (bytes_p)
|
||
{
|
||
/* Convert to a power of 2. */
|
||
if (align != 0)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; (align & 1) == 0; align >>= 1, ++i)
|
||
;
|
||
if (align != 1)
|
||
as_bad (_("alignment not a power of 2"));
|
||
|
||
align = i;
|
||
}
|
||
}
|
||
|
||
if (align > align_limit)
|
||
{
|
||
align = align_limit;
|
||
as_warn (_("alignment too large: %u assumed"), align);
|
||
}
|
||
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
fill_p = 0;
|
||
max = 0;
|
||
}
|
||
else
|
||
{
|
||
++input_line_pointer;
|
||
if (*input_line_pointer == ',')
|
||
fill_p = 0;
|
||
else
|
||
{
|
||
fill = get_absolute_expression ();
|
||
SKIP_WHITESPACE ();
|
||
fill_p = 1;
|
||
}
|
||
|
||
if (*input_line_pointer != ',')
|
||
max = 0;
|
||
else
|
||
{
|
||
++input_line_pointer;
|
||
max = get_absolute_expression ();
|
||
}
|
||
}
|
||
|
||
if (!fill_p)
|
||
{
|
||
if (arg < 0)
|
||
as_warn (_("expected fill pattern missing"));
|
||
do_align (align, (char *) NULL, 0, max);
|
||
}
|
||
else
|
||
{
|
||
unsigned int fill_len;
|
||
|
||
if (arg >= 0)
|
||
fill_len = 1;
|
||
else
|
||
fill_len = -arg;
|
||
|
||
if (fill_len <= 1)
|
||
{
|
||
char fill_char = 0;
|
||
|
||
fill_char = fill;
|
||
do_align (align, &fill_char, fill_len, max);
|
||
}
|
||
else
|
||
{
|
||
char ab[16];
|
||
|
||
if ((size_t) fill_len > sizeof ab)
|
||
{
|
||
as_warn (_("fill pattern too long, truncating to %u"),
|
||
(unsigned) sizeof ab);
|
||
fill_len = sizeof ab;
|
||
}
|
||
|
||
md_number_to_chars (ab, fill, fill_len);
|
||
do_align (align, ab, fill_len, max);
|
||
}
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
/* Handle the .align pseudo-op on machines where ".align 4" means
|
||
align to a 4 byte boundary. */
|
||
|
||
void
|
||
s_align_bytes (int arg)
|
||
{
|
||
s_align (arg, 1);
|
||
}
|
||
|
||
/* Handle the .align pseudo-op on machines where ".align 4" means align
|
||
to a 2**4 boundary. */
|
||
|
||
void
|
||
s_align_ptwo (int arg)
|
||
{
|
||
s_align (arg, 0);
|
||
}
|
||
|
||
/* Switch in and out of alternate macro mode. */
|
||
|
||
static void
|
||
s_altmacro (int on)
|
||
{
|
||
demand_empty_rest_of_line ();
|
||
macro_set_alternate (on);
|
||
}
|
||
|
||
/* Read a symbol name from input_line_pointer.
|
||
|
||
Stores the symbol name in a buffer and returns a pointer to this buffer.
|
||
The buffer is xalloc'ed. It is the caller's responsibility to free
|
||
this buffer.
|
||
|
||
The name is not left in the i_l_p buffer as it may need processing
|
||
to handle escape characters.
|
||
|
||
Advances i_l_p to the next non-whitespace character.
|
||
|
||
If a symbol name could not be read, the routine issues an error
|
||
messages, skips to the end of the line and returns NULL. */
|
||
|
||
char *
|
||
read_symbol_name (void)
|
||
{
|
||
char * name;
|
||
char * start;
|
||
char c;
|
||
|
||
c = *input_line_pointer++;
|
||
|
||
if (c == '"')
|
||
{
|
||
#define SYM_NAME_CHUNK_LEN 128
|
||
ptrdiff_t len = SYM_NAME_CHUNK_LEN;
|
||
char * name_end;
|
||
unsigned int C;
|
||
|
||
start = name = XNEWVEC (char, len + 1);
|
||
|
||
name_end = name + SYM_NAME_CHUNK_LEN;
|
||
|
||
while (is_a_char (C = next_char_of_string ()))
|
||
{
|
||
if (name >= name_end)
|
||
{
|
||
ptrdiff_t sofar;
|
||
|
||
sofar = name - start;
|
||
len += SYM_NAME_CHUNK_LEN;
|
||
start = XRESIZEVEC (char, start, len + 1);
|
||
name_end = start + len;
|
||
name = start + sofar;
|
||
}
|
||
|
||
*name++ = (char) C;
|
||
}
|
||
*name = 0;
|
||
|
||
/* Since quoted symbol names can contain non-ASCII characters,
|
||
check the string and warn if it cannot be recognised by the
|
||
current character set. */
|
||
if (mbstowcs (NULL, name, len) == (size_t) -1)
|
||
as_warn (_("symbol name not recognised in the current locale"));
|
||
}
|
||
else if (is_name_beginner (c) || (input_from_string && c == FAKE_LABEL_CHAR))
|
||
{
|
||
ptrdiff_t len;
|
||
|
||
name = input_line_pointer - 1;
|
||
|
||
/* We accept FAKE_LABEL_CHAR in a name in case this is
|
||
being called with a constructed string. */
|
||
while (is_part_of_name (c = *input_line_pointer++)
|
||
|| (input_from_string && c == FAKE_LABEL_CHAR))
|
||
;
|
||
|
||
len = (input_line_pointer - name) - 1;
|
||
start = XNEWVEC (char, len + 1);
|
||
|
||
memcpy (start, name, len);
|
||
start[len] = 0;
|
||
|
||
/* Skip a name ender char if one is present. */
|
||
if (! is_name_ender (c))
|
||
--input_line_pointer;
|
||
}
|
||
else
|
||
name = start = NULL;
|
||
|
||
if (name == start)
|
||
{
|
||
as_bad (_("expected symbol name"));
|
||
ignore_rest_of_line ();
|
||
return NULL;
|
||
}
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
return start;
|
||
}
|
||
|
||
|
||
symbolS *
|
||
s_comm_internal (int param,
|
||
symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
|
||
{
|
||
char *name;
|
||
offsetT temp, size;
|
||
symbolS *symbolP = NULL;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
expressionS exp;
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
if ((name = read_symbol_name ()) == NULL)
|
||
goto out;
|
||
|
||
/* Accept an optional comma after the name. The comma used to be
|
||
required, but Irix 5 cc does not generate it for .lcomm. */
|
||
if (*input_line_pointer == ',')
|
||
input_line_pointer++;
|
||
|
||
temp = get_absolute_expr (&exp);
|
||
size = temp;
|
||
size &= ((addressT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
|
||
if (exp.X_op == O_absent)
|
||
{
|
||
as_bad (_("missing size expression"));
|
||
ignore_rest_of_line ();
|
||
goto out;
|
||
}
|
||
else if (temp != size || !exp.X_unsigned)
|
||
{
|
||
as_warn (_("size (%ld) out of range, ignored"), (long) temp);
|
||
ignore_rest_of_line ();
|
||
goto out;
|
||
}
|
||
|
||
symbolP = symbol_find_or_make (name);
|
||
if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
|
||
&& !S_IS_COMMON (symbolP))
|
||
{
|
||
if (!S_IS_VOLATILE (symbolP))
|
||
{
|
||
symbolP = NULL;
|
||
as_bad (_("symbol `%s' is already defined"), name);
|
||
ignore_rest_of_line ();
|
||
goto out;
|
||
}
|
||
symbolP = symbol_clone (symbolP, 1);
|
||
S_SET_SEGMENT (symbolP, undefined_section);
|
||
S_SET_VALUE (symbolP, 0);
|
||
symbol_set_frag (symbolP, &zero_address_frag);
|
||
S_CLEAR_VOLATILE (symbolP);
|
||
}
|
||
|
||
size = S_GET_VALUE (symbolP);
|
||
if (size == 0)
|
||
size = temp;
|
||
else if (size != temp)
|
||
as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
|
||
name, (long) size, (long) temp);
|
||
|
||
if (comm_parse_extra != NULL)
|
||
symbolP = (*comm_parse_extra) (param, symbolP, size);
|
||
else
|
||
{
|
||
S_SET_VALUE (symbolP, (valueT) size);
|
||
S_SET_EXTERNAL (symbolP);
|
||
S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
out:
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
if (name != NULL)
|
||
free (name);
|
||
return symbolP;
|
||
}
|
||
|
||
void
|
||
s_comm (int ignore)
|
||
{
|
||
s_comm_internal (ignore, NULL);
|
||
}
|
||
|
||
/* The MRI COMMON pseudo-op. We handle this by creating a common
|
||
symbol with the appropriate name. We make s_space do the right
|
||
thing by increasing the size. */
|
||
|
||
void
|
||
s_mri_common (int small ATTRIBUTE_UNUSED)
|
||
{
|
||
char *name;
|
||
char c;
|
||
char *alc = NULL;
|
||
symbolS *sym;
|
||
offsetT align;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
if (!flag_mri)
|
||
{
|
||
s_comm (0);
|
||
return;
|
||
}
|
||
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
name = input_line_pointer;
|
||
if (!ISDIGIT (*name))
|
||
c = get_symbol_name (& name);
|
||
else
|
||
{
|
||
do
|
||
{
|
||
++input_line_pointer;
|
||
}
|
||
while (ISDIGIT (*input_line_pointer));
|
||
|
||
c = *input_line_pointer;
|
||
*input_line_pointer = '\0';
|
||
|
||
if (line_label != NULL)
|
||
{
|
||
alc = XNEWVEC (char, strlen (S_GET_NAME (line_label))
|
||
+ (input_line_pointer - name) + 1);
|
||
sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
|
||
name = alc;
|
||
}
|
||
}
|
||
|
||
sym = symbol_find_or_make (name);
|
||
c = restore_line_pointer (c);
|
||
if (alc != NULL)
|
||
free (alc);
|
||
|
||
if (*input_line_pointer != ',')
|
||
align = 0;
|
||
else
|
||
{
|
||
++input_line_pointer;
|
||
align = get_absolute_expression ();
|
||
}
|
||
|
||
if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
|
||
{
|
||
as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
|
||
ignore_rest_of_line ();
|
||
mri_comment_end (stop, stopc);
|
||
return;
|
||
}
|
||
|
||
S_SET_EXTERNAL (sym);
|
||
S_SET_SEGMENT (sym, bfd_com_section_ptr);
|
||
mri_common_symbol = sym;
|
||
|
||
#ifdef S_SET_ALIGN
|
||
if (align != 0)
|
||
S_SET_ALIGN (sym, align);
|
||
#else
|
||
(void) align;
|
||
#endif
|
||
|
||
if (line_label != NULL)
|
||
{
|
||
expressionS exp;
|
||
exp.X_op = O_symbol;
|
||
exp.X_add_symbol = sym;
|
||
exp.X_add_number = 0;
|
||
symbol_set_value_expression (line_label, &exp);
|
||
symbol_set_frag (line_label, &zero_address_frag);
|
||
S_SET_SEGMENT (line_label, expr_section);
|
||
}
|
||
|
||
/* FIXME: We just ignore the small argument, which distinguishes
|
||
COMMON and COMMON.S. I don't know what we can do about it. */
|
||
|
||
/* Ignore the type and hptype. */
|
||
if (*input_line_pointer == ',')
|
||
input_line_pointer += 2;
|
||
if (*input_line_pointer == ',')
|
||
input_line_pointer += 2;
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
void
|
||
s_data (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
segT section;
|
||
int temp;
|
||
|
||
temp = get_absolute_expression ();
|
||
if (flag_readonly_data_in_text)
|
||
{
|
||
section = text_section;
|
||
temp += 1000;
|
||
}
|
||
else
|
||
section = data_section;
|
||
|
||
subseg_set (section, (subsegT) temp);
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the .appfile pseudo-op. This is automatically generated by
|
||
do_scrub_chars when a preprocessor # line comment is seen with a
|
||
file name. This default definition may be overridden by the object
|
||
or CPU specific pseudo-ops. This function is also the default
|
||
definition for .file; the APPFILE argument is 1 for .appfile, 0 for
|
||
.file. */
|
||
|
||
void
|
||
s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
|
||
{
|
||
#ifdef LISTING
|
||
if (listing)
|
||
listing_source_file (file);
|
||
#endif
|
||
register_dependency (file);
|
||
#ifdef obj_app_file
|
||
obj_app_file (file, appfile);
|
||
#endif
|
||
}
|
||
|
||
void
|
||
s_app_file (int appfile)
|
||
{
|
||
char *s;
|
||
int length;
|
||
|
||
/* Some assemblers tolerate immediately following '"'. */
|
||
if ((s = demand_copy_string (&length)) != 0)
|
||
{
|
||
int may_omit
|
||
= (!new_logical_line_flags (s, -1, 1) && appfile);
|
||
|
||
/* In MRI mode, the preprocessor may have inserted an extraneous
|
||
backquote. */
|
||
if (flag_m68k_mri
|
||
&& *input_line_pointer == '\''
|
||
&& is_end_of_line[(unsigned char) input_line_pointer[1]])
|
||
++input_line_pointer;
|
||
|
||
demand_empty_rest_of_line ();
|
||
if (!may_omit)
|
||
s_app_file_string (s, appfile);
|
||
}
|
||
}
|
||
|
||
static int
|
||
get_linefile_number (int *flag)
|
||
{
|
||
SKIP_WHITESPACE ();
|
||
|
||
if (*input_line_pointer < '0' || *input_line_pointer > '9')
|
||
return 0;
|
||
|
||
*flag = get_absolute_expression ();
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Handle the .appline pseudo-op. This is automatically generated by
|
||
do_scrub_chars when a preprocessor # line comment is seen. This
|
||
default definition may be overridden by the object or CPU specific
|
||
pseudo-ops. */
|
||
|
||
void
|
||
s_app_line (int appline)
|
||
{
|
||
char *file = NULL;
|
||
int l;
|
||
|
||
/* The given number is that of the next line. */
|
||
if (appline)
|
||
l = get_absolute_expression ();
|
||
else if (!get_linefile_number (&l))
|
||
{
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
l--;
|
||
|
||
if (l < -1)
|
||
/* Some of the back ends can't deal with non-positive line numbers.
|
||
Besides, it's silly. GCC however will generate a line number of
|
||
zero when it is pre-processing builtins for assembler-with-cpp files:
|
||
|
||
# 0 "<built-in>"
|
||
|
||
We do not want to barf on this, especially since such files are used
|
||
in the GCC and GDB testsuites. So we check for negative line numbers
|
||
rather than non-positive line numbers. */
|
||
as_warn (_("line numbers must be positive; line number %d rejected"),
|
||
l + 1);
|
||
else
|
||
{
|
||
int flags = 0;
|
||
int length = 0;
|
||
|
||
if (!appline)
|
||
{
|
||
SKIP_WHITESPACE ();
|
||
|
||
if (*input_line_pointer == '"')
|
||
file = demand_copy_string (&length);
|
||
|
||
if (file)
|
||
{
|
||
int this_flag;
|
||
|
||
while (get_linefile_number (&this_flag))
|
||
switch (this_flag)
|
||
{
|
||
/* From GCC's cpp documentation:
|
||
1: start of a new file.
|
||
2: returning to a file after having included
|
||
another file.
|
||
3: following text comes from a system header file.
|
||
4: following text should be treated as extern "C".
|
||
|
||
4 is nonsensical for the assembler; 3, we don't
|
||
care about, so we ignore it just in case a
|
||
system header file is included while
|
||
preprocessing assembly. So 1 and 2 are all we
|
||
care about, and they are mutually incompatible.
|
||
new_logical_line_flags() demands this. */
|
||
case 1:
|
||
case 2:
|
||
if (flags && flags != (1 << this_flag))
|
||
as_warn (_("incompatible flag %i in line directive"),
|
||
this_flag);
|
||
else
|
||
flags |= 1 << this_flag;
|
||
break;
|
||
|
||
case 3:
|
||
case 4:
|
||
/* We ignore these. */
|
||
break;
|
||
|
||
default:
|
||
as_warn (_("unsupported flag %i in line directive"),
|
||
this_flag);
|
||
break;
|
||
}
|
||
|
||
if (!is_end_of_line[(unsigned char)*input_line_pointer])
|
||
file = 0;
|
||
}
|
||
}
|
||
|
||
if (appline || file)
|
||
{
|
||
new_logical_line_flags (file, l, flags);
|
||
#ifdef LISTING
|
||
if (listing)
|
||
listing_source_line (l);
|
||
#endif
|
||
}
|
||
}
|
||
if (appline || file)
|
||
demand_empty_rest_of_line ();
|
||
else
|
||
ignore_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the .end pseudo-op. Actually, the real work is done in
|
||
read_a_source_file. */
|
||
|
||
void
|
||
s_end (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
if (flag_mri)
|
||
{
|
||
/* The MRI assembler permits the start symbol to follow .end,
|
||
but we don't support that. */
|
||
SKIP_WHITESPACE ();
|
||
if (!is_end_of_line[(unsigned char) *input_line_pointer]
|
||
&& *input_line_pointer != '*'
|
||
&& *input_line_pointer != '!')
|
||
as_warn (_("start address not supported"));
|
||
}
|
||
}
|
||
|
||
/* Handle the .err pseudo-op. */
|
||
|
||
void
|
||
s_err (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
as_bad (_(".err encountered"));
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the .error and .warning pseudo-ops. */
|
||
|
||
void
|
||
s_errwarn (int err)
|
||
{
|
||
int len;
|
||
/* The purpose for the conditional assignment is not to
|
||
internationalize the directive itself, but that we need a
|
||
self-contained message, one that can be passed like the
|
||
demand_copy_C_string return value, and with no assumption on the
|
||
location of the name of the directive within the message. */
|
||
const char *msg
|
||
= (err ? _(".error directive invoked in source file")
|
||
: _(".warning directive invoked in source file"));
|
||
|
||
if (!is_it_end_of_statement ())
|
||
{
|
||
if (*input_line_pointer != '\"')
|
||
{
|
||
as_bad (_("%s argument must be a string"),
|
||
err ? ".error" : ".warning");
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
msg = demand_copy_C_string (&len);
|
||
if (msg == NULL)
|
||
return;
|
||
}
|
||
|
||
if (err)
|
||
as_bad ("%s", msg);
|
||
else
|
||
as_warn ("%s", msg);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the MRI fail pseudo-op. */
|
||
|
||
void
|
||
s_fail (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
offsetT temp;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
temp = get_absolute_expression ();
|
||
if (temp >= 500)
|
||
as_warn (_(".fail %ld encountered"), (long) temp);
|
||
else
|
||
as_bad (_(".fail %ld encountered"), (long) temp);
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
void
|
||
s_fill (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
expressionS rep_exp;
|
||
long size = 1;
|
||
long fill = 0;
|
||
char *p;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
expression (&rep_exp);
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
input_line_pointer++;
|
||
size = get_absolute_expression ();
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
input_line_pointer++;
|
||
fill = get_absolute_expression ();
|
||
}
|
||
}
|
||
|
||
/* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
|
||
#define BSD_FILL_SIZE_CROCK_8 (8)
|
||
if (size > BSD_FILL_SIZE_CROCK_8)
|
||
{
|
||
as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
|
||
size = BSD_FILL_SIZE_CROCK_8;
|
||
}
|
||
if (size < 0)
|
||
{
|
||
as_warn (_("size negative; .fill ignored"));
|
||
size = 0;
|
||
}
|
||
else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
|
||
{
|
||
if (rep_exp.X_add_number < 0)
|
||
as_warn (_("repeat < 0; .fill ignored"));
|
||
size = 0;
|
||
}
|
||
|
||
if (size && !need_pass_2)
|
||
{
|
||
if (now_seg == absolute_section)
|
||
{
|
||
if (rep_exp.X_op != O_constant)
|
||
as_bad (_("non-constant fill count for absolute section"));
|
||
else if (fill && rep_exp.X_add_number != 0)
|
||
as_bad (_("attempt to fill absolute section with non-zero value"));
|
||
abs_section_offset += rep_exp.X_add_number * size;
|
||
}
|
||
else if (fill
|
||
&& (rep_exp.X_op != O_constant || rep_exp.X_add_number != 0)
|
||
&& in_bss ())
|
||
as_bad (_("attempt to fill section `%s' with non-zero value"),
|
||
segment_name (now_seg));
|
||
|
||
if (rep_exp.X_op == O_constant)
|
||
{
|
||
p = frag_var (rs_fill, (int) size, (int) size,
|
||
(relax_substateT) 0, (symbolS *) 0,
|
||
(offsetT) rep_exp.X_add_number,
|
||
(char *) 0);
|
||
}
|
||
else
|
||
{
|
||
/* We don't have a constant repeat count, so we can't use
|
||
rs_fill. We can get the same results out of rs_space,
|
||
but its argument is in bytes, so we must multiply the
|
||
repeat count by size. */
|
||
|
||
symbolS *rep_sym;
|
||
rep_sym = make_expr_symbol (&rep_exp);
|
||
if (size != 1)
|
||
{
|
||
expressionS size_exp;
|
||
size_exp.X_op = O_constant;
|
||
size_exp.X_add_number = size;
|
||
|
||
rep_exp.X_op = O_multiply;
|
||
rep_exp.X_add_symbol = rep_sym;
|
||
rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
|
||
rep_exp.X_add_number = 0;
|
||
rep_sym = make_expr_symbol (&rep_exp);
|
||
}
|
||
|
||
p = frag_var (rs_space, (int) size, (int) size,
|
||
(relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
|
||
}
|
||
|
||
memset (p, 0, (unsigned int) size);
|
||
|
||
/* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
|
||
flavoured AS. The following bizarre behaviour is to be
|
||
compatible with above. I guess they tried to take up to 8
|
||
bytes from a 4-byte expression and they forgot to sign
|
||
extend. */
|
||
#define BSD_FILL_SIZE_CROCK_4 (4)
|
||
md_number_to_chars (p, (valueT) fill,
|
||
(size > BSD_FILL_SIZE_CROCK_4
|
||
? BSD_FILL_SIZE_CROCK_4
|
||
: (int) size));
|
||
/* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
|
||
but emits no error message because it seems a legal thing to do.
|
||
It is a degenerate case of .fill but could be emitted by a
|
||
compiler. */
|
||
}
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
void
|
||
s_globl (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *name;
|
||
int c;
|
||
symbolS *symbolP;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
do
|
||
{
|
||
if ((name = read_symbol_name ()) == NULL)
|
||
return;
|
||
|
||
symbolP = symbol_find_or_make (name);
|
||
S_SET_EXTERNAL (symbolP);
|
||
|
||
SKIP_WHITESPACE ();
|
||
c = *input_line_pointer;
|
||
if (c == ',')
|
||
{
|
||
input_line_pointer++;
|
||
SKIP_WHITESPACE ();
|
||
if (is_end_of_line[(unsigned char) *input_line_pointer])
|
||
c = '\n';
|
||
}
|
||
|
||
free (name);
|
||
}
|
||
while (c == ',');
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
/* Handle the MRI IRP and IRPC pseudo-ops. */
|
||
|
||
void
|
||
s_irp (int irpc)
|
||
{
|
||
char * eol;
|
||
const char * file;
|
||
unsigned int line;
|
||
sb s;
|
||
const char *err;
|
||
sb out;
|
||
|
||
file = as_where (&line);
|
||
|
||
eol = find_end_of_line (input_line_pointer, 0);
|
||
sb_build (&s, eol - input_line_pointer);
|
||
sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
|
||
input_line_pointer = eol;
|
||
|
||
sb_new (&out);
|
||
|
||
err = expand_irp (irpc, 0, &s, &out, get_non_macro_line_sb);
|
||
if (err != NULL)
|
||
as_bad_where (file, line, "%s", err);
|
||
|
||
sb_kill (&s);
|
||
|
||
input_scrub_include_sb (&out, input_line_pointer, 1);
|
||
sb_kill (&out);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
|
||
/* Handle the .linkonce pseudo-op. This tells the assembler to mark
|
||
the section to only be linked once. However, this is not supported
|
||
by most object file formats. This takes an optional argument,
|
||
which is what to do about duplicates. */
|
||
|
||
void
|
||
s_linkonce (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
enum linkonce_type type;
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
type = LINKONCE_DISCARD;
|
||
|
||
if (!is_end_of_line[(unsigned char) *input_line_pointer])
|
||
{
|
||
char *s;
|
||
char c;
|
||
|
||
c = get_symbol_name (& s);
|
||
if (strcasecmp (s, "discard") == 0)
|
||
type = LINKONCE_DISCARD;
|
||
else if (strcasecmp (s, "one_only") == 0)
|
||
type = LINKONCE_ONE_ONLY;
|
||
else if (strcasecmp (s, "same_size") == 0)
|
||
type = LINKONCE_SAME_SIZE;
|
||
else if (strcasecmp (s, "same_contents") == 0)
|
||
type = LINKONCE_SAME_CONTENTS;
|
||
else
|
||
as_warn (_("unrecognized .linkonce type `%s'"), s);
|
||
|
||
(void) restore_line_pointer (c);
|
||
}
|
||
|
||
#ifdef obj_handle_link_once
|
||
obj_handle_link_once (type);
|
||
#else /* ! defined (obj_handle_link_once) */
|
||
{
|
||
flagword flags;
|
||
|
||
if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
|
||
as_warn (_(".linkonce is not supported for this object file format"));
|
||
|
||
flags = bfd_get_section_flags (stdoutput, now_seg);
|
||
flags |= SEC_LINK_ONCE;
|
||
switch (type)
|
||
{
|
||
default:
|
||
abort ();
|
||
case LINKONCE_DISCARD:
|
||
flags |= SEC_LINK_DUPLICATES_DISCARD;
|
||
break;
|
||
case LINKONCE_ONE_ONLY:
|
||
flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
|
||
break;
|
||
case LINKONCE_SAME_SIZE:
|
||
flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
|
||
break;
|
||
case LINKONCE_SAME_CONTENTS:
|
||
flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
|
||
break;
|
||
}
|
||
if (!bfd_set_section_flags (stdoutput, now_seg, flags))
|
||
as_bad (_("bfd_set_section_flags: %s"),
|
||
bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
#endif /* ! defined (obj_handle_link_once) */
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
void
|
||
bss_alloc (symbolS *symbolP, addressT size, unsigned int align)
|
||
{
|
||
char *pfrag;
|
||
segT current_seg = now_seg;
|
||
subsegT current_subseg = now_subseg;
|
||
segT bss_seg = bss_section;
|
||
|
||
#if defined (TC_MIPS) || defined (TC_ALPHA)
|
||
if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
|
||
|| OUTPUT_FLAVOR == bfd_target_elf_flavour)
|
||
{
|
||
/* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
|
||
if (size <= bfd_get_gp_size (stdoutput))
|
||
{
|
||
bss_seg = subseg_new (".sbss", 1);
|
||
seg_info (bss_seg)->bss = 1;
|
||
if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
|
||
as_warn (_("error setting flags for \".sbss\": %s"),
|
||
bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
}
|
||
#endif
|
||
subseg_set (bss_seg, 1);
|
||
|
||
if (align > OCTETS_PER_BYTE_POWER)
|
||
{
|
||
record_alignment (bss_seg, align);
|
||
frag_align (align, 0, 0);
|
||
}
|
||
|
||
/* Detach from old frag. */
|
||
if (S_GET_SEGMENT (symbolP) == bss_seg)
|
||
symbol_get_frag (symbolP)->fr_symbol = NULL;
|
||
|
||
symbol_set_frag (symbolP, frag_now);
|
||
pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
|
||
*pfrag = 0;
|
||
|
||
#ifdef S_SET_SIZE
|
||
S_SET_SIZE (symbolP, size);
|
||
#endif
|
||
S_SET_SEGMENT (symbolP, bss_seg);
|
||
|
||
#ifdef OBJ_COFF
|
||
/* The symbol may already have been created with a preceding
|
||
".globl" directive -- be careful not to step on storage class
|
||
in that case. Otherwise, set it to static. */
|
||
if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
|
||
S_SET_STORAGE_CLASS (symbolP, C_STAT);
|
||
#endif /* OBJ_COFF */
|
||
|
||
subseg_set (current_seg, current_subseg);
|
||
}
|
||
|
||
offsetT
|
||
parse_align (int align_bytes)
|
||
{
|
||
expressionS exp;
|
||
addressT align;
|
||
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
no_align:
|
||
as_bad (_("expected alignment after size"));
|
||
ignore_rest_of_line ();
|
||
return -1;
|
||
}
|
||
|
||
input_line_pointer++;
|
||
SKIP_WHITESPACE ();
|
||
|
||
align = get_absolute_expr (&exp);
|
||
if (exp.X_op == O_absent)
|
||
goto no_align;
|
||
|
||
if (!exp.X_unsigned)
|
||
{
|
||
as_warn (_("alignment negative; 0 assumed"));
|
||
align = 0;
|
||
}
|
||
|
||
if (align_bytes && align != 0)
|
||
{
|
||
/* convert to a power of 2 alignment */
|
||
unsigned int alignp2 = 0;
|
||
while ((align & 1) == 0)
|
||
align >>= 1, ++alignp2;
|
||
if (align != 1)
|
||
{
|
||
as_bad (_("alignment not a power of 2"));
|
||
ignore_rest_of_line ();
|
||
return -1;
|
||
}
|
||
align = alignp2;
|
||
}
|
||
return align;
|
||
}
|
||
|
||
/* Called from s_comm_internal after symbol name and size have been
|
||
parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
|
||
1 if this was a ".bss" directive which has a 3rd argument
|
||
(alignment as a power of 2), or 2 if this was a ".bss" directive
|
||
with alignment in bytes. */
|
||
|
||
symbolS *
|
||
s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
|
||
{
|
||
addressT align = 0;
|
||
|
||
if (needs_align)
|
||
{
|
||
align = parse_align (needs_align - 1);
|
||
if (align == (addressT) -1)
|
||
return NULL;
|
||
}
|
||
else
|
||
/* Assume some objects may require alignment on some systems. */
|
||
TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
|
||
|
||
bss_alloc (symbolP, size, align);
|
||
return symbolP;
|
||
}
|
||
|
||
void
|
||
s_lcomm (int needs_align)
|
||
{
|
||
s_comm_internal (needs_align, s_lcomm_internal);
|
||
}
|
||
|
||
void
|
||
s_lcomm_bytes (int needs_align)
|
||
{
|
||
s_comm_internal (needs_align * 2, s_lcomm_internal);
|
||
}
|
||
|
||
void
|
||
s_lsym (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *name;
|
||
expressionS exp;
|
||
symbolS *symbolP;
|
||
|
||
/* We permit ANY defined expression: BSD4.2 demands constants. */
|
||
if ((name = read_symbol_name ()) == NULL)
|
||
return;
|
||
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
as_bad (_("expected comma after \"%s\""), name);
|
||
goto err_out;
|
||
}
|
||
|
||
input_line_pointer++;
|
||
expression_and_evaluate (&exp);
|
||
|
||
if (exp.X_op != O_constant
|
||
&& exp.X_op != O_register)
|
||
{
|
||
as_bad (_("bad expression"));
|
||
goto err_out;
|
||
}
|
||
|
||
symbolP = symbol_find_or_make (name);
|
||
|
||
if (S_GET_SEGMENT (symbolP) == undefined_section)
|
||
{
|
||
/* The name might be an undefined .global symbol; be sure to
|
||
keep the "external" bit. */
|
||
S_SET_SEGMENT (symbolP,
|
||
(exp.X_op == O_constant
|
||
? absolute_section
|
||
: reg_section));
|
||
S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
|
||
}
|
||
else
|
||
{
|
||
as_bad (_("symbol `%s' is already defined"), name);
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
free (name);
|
||
return;
|
||
|
||
err_out:
|
||
ignore_rest_of_line ();
|
||
free (name);
|
||
return;
|
||
}
|
||
|
||
/* Read a line into an sb. Returns the character that ended the line
|
||
or zero if there are no more lines. */
|
||
|
||
static int
|
||
get_line_sb (sb *line, int in_macro)
|
||
{
|
||
char *eol;
|
||
|
||
if (input_line_pointer[-1] == '\n')
|
||
bump_line_counters ();
|
||
|
||
if (input_line_pointer >= buffer_limit)
|
||
{
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
if (buffer_limit == 0)
|
||
return 0;
|
||
}
|
||
|
||
eol = _find_end_of_line (input_line_pointer, flag_m68k_mri, 0, in_macro);
|
||
sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
|
||
input_line_pointer = eol;
|
||
|
||
/* Don't skip multiple end-of-line characters, because that breaks support
|
||
for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
|
||
characters but isn't. Instead just skip one end of line character and
|
||
return the character skipped so that the caller can re-insert it if
|
||
necessary. */
|
||
return *input_line_pointer++;
|
||
}
|
||
|
||
static size_t
|
||
get_non_macro_line_sb (sb *line)
|
||
{
|
||
return get_line_sb (line, 0);
|
||
}
|
||
|
||
static size_t
|
||
get_macro_line_sb (sb *line)
|
||
{
|
||
return get_line_sb (line, 1);
|
||
}
|
||
|
||
/* Define a macro. This is an interface to macro.c. */
|
||
|
||
void
|
||
s_macro (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *eol;
|
||
const char * file;
|
||
unsigned int line;
|
||
sb s;
|
||
const char *err;
|
||
const char *name;
|
||
|
||
file = as_where (&line);
|
||
|
||
eol = find_end_of_line (input_line_pointer, 0);
|
||
sb_build (&s, eol - input_line_pointer);
|
||
sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
|
||
input_line_pointer = eol;
|
||
|
||
if (line_label != NULL)
|
||
{
|
||
sb label;
|
||
size_t len;
|
||
|
||
name = S_GET_NAME (line_label);
|
||
len = strlen (name);
|
||
sb_build (&label, len);
|
||
sb_add_buffer (&label, name, len);
|
||
err = define_macro (0, &s, &label, get_macro_line_sb, file, line, &name);
|
||
sb_kill (&label);
|
||
}
|
||
else
|
||
err = define_macro (0, &s, NULL, get_macro_line_sb, file, line, &name);
|
||
if (err != NULL)
|
||
as_bad_where (file, line, err, name);
|
||
else
|
||
{
|
||
if (line_label != NULL)
|
||
{
|
||
S_SET_SEGMENT (line_label, absolute_section);
|
||
S_SET_VALUE (line_label, 0);
|
||
symbol_set_frag (line_label, &zero_address_frag);
|
||
}
|
||
|
||
if (((NO_PSEUDO_DOT || flag_m68k_mri)
|
||
&& hash_find (po_hash, name) != NULL)
|
||
|| (!flag_m68k_mri
|
||
&& *name == '.'
|
||
&& hash_find (po_hash, name + 1) != NULL))
|
||
as_warn_where (file,
|
||
line,
|
||
_("attempt to redefine pseudo-op `%s' ignored"),
|
||
name);
|
||
}
|
||
|
||
sb_kill (&s);
|
||
}
|
||
|
||
/* Handle the .mexit pseudo-op, which immediately exits a macro
|
||
expansion. */
|
||
|
||
void
|
||
s_mexit (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
if (macro_nest)
|
||
{
|
||
cond_exit_macro (macro_nest);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
else
|
||
as_warn (_("ignoring macro exit outside a macro definition."));
|
||
}
|
||
|
||
/* Switch in and out of MRI mode. */
|
||
|
||
void
|
||
s_mri (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
int on;
|
||
#ifdef MRI_MODE_CHANGE
|
||
int old_flag;
|
||
#endif
|
||
|
||
on = get_absolute_expression ();
|
||
#ifdef MRI_MODE_CHANGE
|
||
old_flag = flag_mri;
|
||
#endif
|
||
if (on != 0)
|
||
{
|
||
flag_mri = 1;
|
||
#ifdef TC_M68K
|
||
flag_m68k_mri = 1;
|
||
#endif
|
||
macro_mri_mode (1);
|
||
}
|
||
else
|
||
{
|
||
flag_mri = 0;
|
||
#ifdef TC_M68K
|
||
flag_m68k_mri = 0;
|
||
#endif
|
||
macro_mri_mode (0);
|
||
}
|
||
|
||
/* Operator precedence changes in m68k MRI mode, so we need to
|
||
update the operator rankings. */
|
||
expr_set_precedence ();
|
||
|
||
#ifdef MRI_MODE_CHANGE
|
||
if (on != old_flag)
|
||
MRI_MODE_CHANGE (on);
|
||
#endif
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle changing the location counter. */
|
||
|
||
static void
|
||
do_org (segT segment, expressionS *exp, int fill)
|
||
{
|
||
if (segment != now_seg
|
||
&& segment != absolute_section
|
||
&& segment != expr_section)
|
||
as_bad (_("invalid segment \"%s\""), segment_name (segment));
|
||
|
||
if (now_seg == absolute_section)
|
||
{
|
||
if (fill != 0)
|
||
as_warn (_("ignoring fill value in absolute section"));
|
||
if (exp->X_op != O_constant)
|
||
{
|
||
as_bad (_("only constant offsets supported in absolute section"));
|
||
exp->X_add_number = 0;
|
||
}
|
||
abs_section_offset = exp->X_add_number;
|
||
}
|
||
else
|
||
{
|
||
char *p;
|
||
symbolS *sym = exp->X_add_symbol;
|
||
offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
|
||
|
||
if (fill && in_bss ())
|
||
as_warn (_("ignoring fill value in section `%s'"),
|
||
segment_name (now_seg));
|
||
|
||
if (exp->X_op != O_constant && exp->X_op != O_symbol)
|
||
{
|
||
/* Handle complex expressions. */
|
||
sym = make_expr_symbol (exp);
|
||
off = 0;
|
||
}
|
||
|
||
p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
|
||
*p = fill;
|
||
}
|
||
}
|
||
|
||
void
|
||
s_org (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
segT segment;
|
||
expressionS exp;
|
||
long temp_fill;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
/* The m68k MRI assembler has a different meaning for .org. It
|
||
means to create an absolute section at a given address. We can't
|
||
support that--use a linker script instead. */
|
||
if (flag_m68k_mri)
|
||
{
|
||
as_bad (_("MRI style ORG pseudo-op not supported"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
/* Don't believe the documentation of BSD 4.2 AS. There is no such
|
||
thing as a sub-segment-relative origin. Any absolute origin is
|
||
given a warning, then assumed to be segment-relative. Any
|
||
segmented origin expression ("foo+42") had better be in the right
|
||
segment or the .org is ignored.
|
||
|
||
BSD 4.2 AS warns if you try to .org backwards. We cannot because
|
||
we never know sub-segment sizes when we are reading code. BSD
|
||
will crash trying to emit negative numbers of filler bytes in
|
||
certain .orgs. We don't crash, but see as-write for that code.
|
||
|
||
Don't make frag if need_pass_2==1. */
|
||
segment = get_known_segmented_expression (&exp);
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
input_line_pointer++;
|
||
temp_fill = get_absolute_expression ();
|
||
}
|
||
else
|
||
temp_fill = 0;
|
||
|
||
if (!need_pass_2)
|
||
do_org (segment, &exp, temp_fill);
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
|
||
called by the obj-format routine which handles section changing
|
||
when in MRI mode. It will create a new section, and return it. It
|
||
will set *TYPE to the section type: one of 'C' (code), 'D' (data),
|
||
'M' (mixed), or 'R' (romable). The flags will be set in the section. */
|
||
|
||
void
|
||
s_mri_sect (char *type ATTRIBUTE_UNUSED)
|
||
{
|
||
#ifdef TC_M68K
|
||
|
||
char *name;
|
||
char c;
|
||
segT seg;
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
name = input_line_pointer;
|
||
if (!ISDIGIT (*name))
|
||
c = get_symbol_name (& name);
|
||
else
|
||
{
|
||
do
|
||
{
|
||
++input_line_pointer;
|
||
}
|
||
while (ISDIGIT (*input_line_pointer));
|
||
|
||
c = *input_line_pointer;
|
||
*input_line_pointer = '\0';
|
||
}
|
||
|
||
name = xstrdup (name);
|
||
|
||
c = restore_line_pointer (c);
|
||
|
||
seg = subseg_new (name, 0);
|
||
|
||
if (c == ',')
|
||
{
|
||
unsigned int align;
|
||
|
||
++input_line_pointer;
|
||
align = get_absolute_expression ();
|
||
record_alignment (seg, align);
|
||
}
|
||
|
||
*type = 'C';
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
c = *++input_line_pointer;
|
||
c = TOUPPER (c);
|
||
if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
|
||
*type = c;
|
||
else
|
||
as_bad (_("unrecognized section type"));
|
||
++input_line_pointer;
|
||
|
||
{
|
||
flagword flags;
|
||
|
||
flags = SEC_NO_FLAGS;
|
||
if (*type == 'C')
|
||
flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
|
||
else if (*type == 'D' || *type == 'M')
|
||
flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
|
||
else if (*type == 'R')
|
||
flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
|
||
if (flags != SEC_NO_FLAGS)
|
||
{
|
||
if (!bfd_set_section_flags (stdoutput, seg, flags))
|
||
as_warn (_("error setting flags for \"%s\": %s"),
|
||
bfd_section_name (stdoutput, seg),
|
||
bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Ignore the HP type. */
|
||
if (*input_line_pointer == ',')
|
||
input_line_pointer += 2;
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
#else /* ! TC_M68K */
|
||
/* The MRI assembler seems to use different forms of .sect for
|
||
different targets. */
|
||
as_bad ("MRI mode not supported for this target");
|
||
ignore_rest_of_line ();
|
||
#endif /* ! TC_M68K */
|
||
}
|
||
|
||
/* Handle the .print pseudo-op. */
|
||
|
||
void
|
||
s_print (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *s;
|
||
int len;
|
||
|
||
s = demand_copy_C_string (&len);
|
||
if (s != NULL)
|
||
printf ("%s\n", s);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the .purgem pseudo-op. */
|
||
|
||
void
|
||
s_purgem (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
if (is_it_end_of_statement ())
|
||
{
|
||
demand_empty_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
do
|
||
{
|
||
char *name;
|
||
char c;
|
||
|
||
SKIP_WHITESPACE ();
|
||
c = get_symbol_name (& name);
|
||
delete_macro (name);
|
||
*input_line_pointer = c;
|
||
SKIP_WHITESPACE_AFTER_NAME ();
|
||
}
|
||
while (*input_line_pointer++ == ',');
|
||
|
||
--input_line_pointer;
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the .endm/.endr pseudo-ops. */
|
||
|
||
static void
|
||
s_bad_end (int endr)
|
||
{
|
||
as_warn (_(".end%c encountered without preceding %s"),
|
||
endr ? 'r' : 'm',
|
||
endr ? ".rept, .irp, or .irpc" : ".macro");
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* Handle the .rept pseudo-op. */
|
||
|
||
void
|
||
s_rept (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
size_t count;
|
||
|
||
count = (size_t) get_absolute_expression ();
|
||
|
||
do_repeat (count, "REPT", "ENDR");
|
||
}
|
||
|
||
/* This function provides a generic repeat block implementation. It allows
|
||
different directives to be used as the start/end keys. */
|
||
|
||
void
|
||
do_repeat (size_t count, const char *start, const char *end)
|
||
{
|
||
sb one;
|
||
sb many;
|
||
|
||
if (((ssize_t) count) < 0)
|
||
{
|
||
as_bad (_("negative count for %s - ignored"), start);
|
||
count = 0;
|
||
}
|
||
|
||
sb_new (&one);
|
||
if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
|
||
{
|
||
as_bad (_("%s without %s"), start, end);
|
||
return;
|
||
}
|
||
|
||
sb_build (&many, count * one.len);
|
||
while (count-- > 0)
|
||
sb_add_sb (&many, &one);
|
||
|
||
sb_kill (&one);
|
||
|
||
input_scrub_include_sb (&many, input_line_pointer, 1);
|
||
sb_kill (&many);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
|
||
/* Like do_repeat except that any text matching EXPANDER in the
|
||
block is replaced by the iteration count. */
|
||
|
||
void
|
||
do_repeat_with_expander (size_t count,
|
||
const char * start,
|
||
const char * end,
|
||
const char * expander)
|
||
{
|
||
sb one;
|
||
sb many;
|
||
|
||
if (((ssize_t) count) < 0)
|
||
{
|
||
as_bad (_("negative count for %s - ignored"), start);
|
||
count = 0;
|
||
}
|
||
|
||
sb_new (&one);
|
||
if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
|
||
{
|
||
as_bad (_("%s without %s"), start, end);
|
||
return;
|
||
}
|
||
|
||
sb_new (&many);
|
||
|
||
if (expander != NULL && strstr (one.ptr, expander) != NULL)
|
||
{
|
||
while (count -- > 0)
|
||
{
|
||
int len;
|
||
char * sub;
|
||
sb processed;
|
||
|
||
sb_build (& processed, one.len);
|
||
sb_add_sb (& processed, & one);
|
||
sub = strstr (processed.ptr, expander);
|
||
len = sprintf (sub, "%lu", (unsigned long) count);
|
||
gas_assert (len < 8);
|
||
memmove (sub + len, sub + 8,
|
||
processed.ptr + processed.len - (sub + 8));
|
||
processed.len -= (8 - len);
|
||
sb_add_sb (& many, & processed);
|
||
sb_kill (& processed);
|
||
}
|
||
}
|
||
else
|
||
while (count-- > 0)
|
||
sb_add_sb (&many, &one);
|
||
|
||
sb_kill (&one);
|
||
|
||
input_scrub_include_sb (&many, input_line_pointer, 1);
|
||
sb_kill (&many);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
|
||
/* Skip to end of current repeat loop; EXTRA indicates how many additional
|
||
input buffers to skip. Assumes that conditionals preceding the loop end
|
||
are properly nested.
|
||
|
||
This function makes it easier to implement a premature "break" out of the
|
||
loop. The EXTRA arg accounts for other buffers we might have inserted,
|
||
such as line substitutions. */
|
||
|
||
void
|
||
end_repeat (int extra)
|
||
{
|
||
cond_exit_macro (macro_nest);
|
||
while (extra-- >= 0)
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
|
||
static void
|
||
assign_symbol (char *name, int mode)
|
||
{
|
||
symbolS *symbolP;
|
||
|
||
if (name[0] == '.' && name[1] == '\0')
|
||
{
|
||
/* Turn '. = mumble' into a .org mumble. */
|
||
segT segment;
|
||
expressionS exp;
|
||
|
||
segment = get_known_segmented_expression (&exp);
|
||
|
||
if (!need_pass_2)
|
||
do_org (segment, &exp, 0);
|
||
|
||
return;
|
||
}
|
||
|
||
if ((symbolP = symbol_find (name)) == NULL
|
||
&& (symbolP = md_undefined_symbol (name)) == NULL)
|
||
{
|
||
symbolP = symbol_find_or_make (name);
|
||
#ifndef NO_LISTING
|
||
/* When doing symbol listings, play games with dummy fragments living
|
||
outside the normal fragment chain to record the file and line info
|
||
for this symbol. */
|
||
if (listing & LISTING_SYMBOLS)
|
||
{
|
||
extern struct list_info_struct *listing_tail;
|
||
fragS *dummy_frag = XCNEW (fragS);
|
||
dummy_frag->line = listing_tail;
|
||
dummy_frag->fr_symbol = symbolP;
|
||
symbol_set_frag (symbolP, dummy_frag);
|
||
}
|
||
#endif
|
||
#if defined (OBJ_COFF) && !defined (TE_PE)
|
||
/* "set" symbols are local unless otherwise specified. */
|
||
SF_SET_LOCAL (symbolP);
|
||
#endif
|
||
}
|
||
|
||
if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
|
||
{
|
||
if ((mode != 0 || !S_IS_VOLATILE (symbolP))
|
||
&& !S_CAN_BE_REDEFINED (symbolP))
|
||
{
|
||
as_bad (_("symbol `%s' is already defined"), name);
|
||
ignore_rest_of_line ();
|
||
input_line_pointer--;
|
||
return;
|
||
}
|
||
/* If the symbol is volatile, copy the symbol and replace the
|
||
original with the copy, so that previous uses of the symbol will
|
||
retain the value of the symbol at the point of use. */
|
||
else if (S_IS_VOLATILE (symbolP))
|
||
symbolP = symbol_clone (symbolP, 1);
|
||
}
|
||
|
||
if (mode == 0)
|
||
S_SET_VOLATILE (symbolP);
|
||
else if (mode < 0)
|
||
S_SET_FORWARD_REF (symbolP);
|
||
|
||
pseudo_set (symbolP);
|
||
}
|
||
|
||
/* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
|
||
then this is .equiv, and it is an error if the symbol is already
|
||
defined. If EQUIV is -1, the symbol additionally is a forward
|
||
reference. */
|
||
|
||
void
|
||
s_set (int equiv)
|
||
{
|
||
char *name;
|
||
|
||
/* Especial apologies for the random logic:
|
||
this just grew, and could be parsed much more simply!
|
||
Dean in haste. */
|
||
if ((name = read_symbol_name ()) == NULL)
|
||
return;
|
||
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
as_bad (_("expected comma after \"%s\""), name);
|
||
ignore_rest_of_line ();
|
||
free (name);
|
||
return;
|
||
}
|
||
|
||
input_line_pointer++;
|
||
assign_symbol (name, equiv);
|
||
demand_empty_rest_of_line ();
|
||
free (name);
|
||
}
|
||
|
||
void
|
||
s_space (int mult)
|
||
{
|
||
expressionS exp;
|
||
expressionS val;
|
||
char *p = 0;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
int bytes;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
/* In m68k MRI mode, we need to align to a word boundary, unless
|
||
this is ds.b. */
|
||
if (flag_m68k_mri && mult > 1)
|
||
{
|
||
if (now_seg == absolute_section)
|
||
{
|
||
abs_section_offset += abs_section_offset & 1;
|
||
if (line_label != NULL)
|
||
S_SET_VALUE (line_label, abs_section_offset);
|
||
}
|
||
else if (mri_common_symbol != NULL)
|
||
{
|
||
valueT mri_val;
|
||
|
||
mri_val = S_GET_VALUE (mri_common_symbol);
|
||
if ((mri_val & 1) != 0)
|
||
{
|
||
S_SET_VALUE (mri_common_symbol, mri_val + 1);
|
||
if (line_label != NULL)
|
||
{
|
||
expressionS *symexp;
|
||
|
||
symexp = symbol_get_value_expression (line_label);
|
||
know (symexp->X_op == O_symbol);
|
||
know (symexp->X_add_symbol == mri_common_symbol);
|
||
symexp->X_add_number += 1;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
do_align (1, (char *) NULL, 0, 0);
|
||
if (line_label != NULL)
|
||
{
|
||
symbol_set_frag (line_label, frag_now);
|
||
S_SET_VALUE (line_label, frag_now_fix ());
|
||
}
|
||
}
|
||
}
|
||
|
||
bytes = mult;
|
||
|
||
expression (&exp);
|
||
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
++input_line_pointer;
|
||
expression (&val);
|
||
}
|
||
else
|
||
{
|
||
val.X_op = O_constant;
|
||
val.X_add_number = 0;
|
||
}
|
||
|
||
if ((val.X_op != O_constant
|
||
|| val.X_add_number < - 0x80
|
||
|| val.X_add_number > 0xff
|
||
|| (mult != 0 && mult != 1 && val.X_add_number != 0))
|
||
&& (now_seg != absolute_section && !in_bss ()))
|
||
{
|
||
resolve_expression (&exp);
|
||
if (exp.X_op != O_constant)
|
||
as_bad (_("unsupported variable size or fill value"));
|
||
else
|
||
{
|
||
offsetT i;
|
||
|
||
/* PR 20901: Check for excessive values.
|
||
FIXME: 1<<10 is an arbitrary limit. Maybe use maxpagesize instead ? */
|
||
if (exp.X_add_number < 0 || exp.X_add_number > (1 << 10))
|
||
as_bad (_("size value for space directive too large: %lx"),
|
||
(long) exp.X_add_number);
|
||
else
|
||
{
|
||
if (mult == 0)
|
||
mult = 1;
|
||
bytes = mult * exp.X_add_number;
|
||
|
||
for (i = 0; i < exp.X_add_number; i++)
|
||
emit_expr (&val, mult);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (now_seg == absolute_section || mri_common_symbol != NULL)
|
||
resolve_expression (&exp);
|
||
|
||
if (exp.X_op == O_constant)
|
||
{
|
||
offsetT repeat;
|
||
|
||
repeat = exp.X_add_number;
|
||
if (mult)
|
||
repeat *= mult;
|
||
bytes = repeat;
|
||
if (repeat <= 0)
|
||
{
|
||
if (!flag_mri)
|
||
as_warn (_(".space repeat count is zero, ignored"));
|
||
else if (repeat < 0)
|
||
as_warn (_(".space repeat count is negative, ignored"));
|
||
goto getout;
|
||
}
|
||
|
||
/* If we are in the absolute section, just bump the offset. */
|
||
if (now_seg == absolute_section)
|
||
{
|
||
if (val.X_op != O_constant || val.X_add_number != 0)
|
||
as_warn (_("ignoring fill value in absolute section"));
|
||
abs_section_offset += repeat;
|
||
goto getout;
|
||
}
|
||
|
||
/* If we are secretly in an MRI common section, then
|
||
creating space just increases the size of the common
|
||
symbol. */
|
||
if (mri_common_symbol != NULL)
|
||
{
|
||
S_SET_VALUE (mri_common_symbol,
|
||
S_GET_VALUE (mri_common_symbol) + repeat);
|
||
goto getout;
|
||
}
|
||
|
||
if (!need_pass_2)
|
||
p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
|
||
(offsetT) repeat, (char *) 0);
|
||
}
|
||
else
|
||
{
|
||
if (now_seg == absolute_section)
|
||
{
|
||
as_bad (_("space allocation too complex in absolute section"));
|
||
subseg_set (text_section, 0);
|
||
}
|
||
|
||
if (mri_common_symbol != NULL)
|
||
{
|
||
as_bad (_("space allocation too complex in common section"));
|
||
mri_common_symbol = NULL;
|
||
}
|
||
|
||
if (!need_pass_2)
|
||
p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
|
||
make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
|
||
}
|
||
|
||
if ((val.X_op != O_constant || val.X_add_number != 0) && in_bss ())
|
||
as_warn (_("ignoring fill value in section `%s'"),
|
||
segment_name (now_seg));
|
||
else if (p)
|
||
*p = val.X_add_number;
|
||
}
|
||
|
||
getout:
|
||
|
||
/* In MRI mode, after an odd number of bytes, we must align to an
|
||
even word boundary, unless the next instruction is a dc.b, ds.b
|
||
or dcb.b. */
|
||
if (flag_mri && (bytes & 1) != 0)
|
||
mri_pending_align = 1;
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
void
|
||
s_nops (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
expressionS exp;
|
||
expressionS val;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
expression (&exp);
|
||
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
++input_line_pointer;
|
||
expression (&val);
|
||
}
|
||
else
|
||
{
|
||
val.X_op = O_constant;
|
||
val.X_add_number = 0;
|
||
}
|
||
|
||
if (val.X_op == O_constant)
|
||
{
|
||
if (val.X_add_number < 0)
|
||
{
|
||
as_warn (_("negative nop control byte, ignored"));
|
||
val.X_add_number = 0;
|
||
}
|
||
|
||
if (!need_pass_2)
|
||
{
|
||
/* Store the no-op instruction control byte in the first byte
|
||
of frag. */
|
||
char *p;
|
||
symbolS *sym = make_expr_symbol (&exp);
|
||
p = frag_var (rs_space_nop, 1, 1, (relax_substateT) 0,
|
||
sym, (offsetT) 0, (char *) 0);
|
||
*p = val.X_add_number;
|
||
}
|
||
}
|
||
else
|
||
as_bad (_("unsupported variable nop control in .nops directive"));
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* This is like s_space, but the value is a floating point number with
|
||
the given precision. This is for the MRI dcb.s pseudo-op and
|
||
friends. */
|
||
|
||
void
|
||
s_float_space (int float_type)
|
||
{
|
||
offsetT count;
|
||
int flen;
|
||
char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
count = get_absolute_expression ();
|
||
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
as_bad (_("missing value"));
|
||
ignore_rest_of_line ();
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
return;
|
||
}
|
||
|
||
++input_line_pointer;
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
/* Skip any 0{letter} that may be present. Don't even check if the
|
||
* letter is legal. */
|
||
if (input_line_pointer[0] == '0'
|
||
&& ISALPHA (input_line_pointer[1]))
|
||
input_line_pointer += 2;
|
||
|
||
/* Accept :xxxx, where the x's are hex digits, for a floating point
|
||
with the exact digits specified. */
|
||
if (input_line_pointer[0] == ':')
|
||
{
|
||
flen = hex_float (float_type, temp);
|
||
if (flen < 0)
|
||
{
|
||
ignore_rest_of_line ();
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
return;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
const char *err;
|
||
|
||
err = md_atof (float_type, temp, &flen);
|
||
know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
|
||
know (err != NULL || flen > 0);
|
||
if (err)
|
||
{
|
||
as_bad (_("bad floating literal: %s"), err);
|
||
ignore_rest_of_line ();
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
return;
|
||
}
|
||
}
|
||
|
||
while (--count >= 0)
|
||
{
|
||
char *p;
|
||
|
||
p = frag_more (flen);
|
||
memcpy (p, temp, (unsigned int) flen);
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
/* Handle the .struct pseudo-op, as found in MIPS assemblers. */
|
||
|
||
void
|
||
s_struct (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
abs_section_offset = get_absolute_expression ();
|
||
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
|
||
/* The ELF backend needs to know that we are changing sections, so
|
||
that .previous works correctly. */
|
||
if (IS_ELF)
|
||
obj_elf_section_change_hook ();
|
||
#endif
|
||
subseg_set (absolute_section, 0);
|
||
demand_empty_rest_of_line ();
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
void
|
||
s_text (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
int temp;
|
||
|
||
temp = get_absolute_expression ();
|
||
subseg_set (text_section, (subsegT) temp);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* .weakref x, y sets x as an alias to y that, as long as y is not
|
||
referenced directly, will cause y to become a weak symbol. */
|
||
void
|
||
s_weakref (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *name;
|
||
symbolS *symbolP;
|
||
symbolS *symbolP2;
|
||
expressionS exp;
|
||
|
||
if ((name = read_symbol_name ()) == NULL)
|
||
return;
|
||
|
||
symbolP = symbol_find_or_make (name);
|
||
|
||
if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
|
||
{
|
||
if (!S_IS_VOLATILE (symbolP))
|
||
{
|
||
as_bad (_("symbol `%s' is already defined"), name);
|
||
goto err_out;
|
||
}
|
||
symbolP = symbol_clone (symbolP, 1);
|
||
S_CLEAR_VOLATILE (symbolP);
|
||
}
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
as_bad (_("expected comma after \"%s\""), name);
|
||
goto err_out;
|
||
}
|
||
|
||
input_line_pointer++;
|
||
|
||
SKIP_WHITESPACE ();
|
||
free (name);
|
||
|
||
if ((name = read_symbol_name ()) == NULL)
|
||
return;
|
||
|
||
if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
|
||
&& (symbolP2 = md_undefined_symbol (name)) == NULL)
|
||
{
|
||
symbolP2 = symbol_find_or_make (name);
|
||
S_SET_WEAKREFD (symbolP2);
|
||
}
|
||
else
|
||
{
|
||
symbolS *symp = symbolP2;
|
||
|
||
while (S_IS_WEAKREFR (symp) && symp != symbolP)
|
||
{
|
||
expressionS *expP = symbol_get_value_expression (symp);
|
||
|
||
gas_assert (expP->X_op == O_symbol
|
||
&& expP->X_add_number == 0);
|
||
symp = expP->X_add_symbol;
|
||
}
|
||
if (symp == symbolP)
|
||
{
|
||
char *loop;
|
||
|
||
loop = concat (S_GET_NAME (symbolP),
|
||
" => ", S_GET_NAME (symbolP2), (const char *) NULL);
|
||
|
||
symp = symbolP2;
|
||
while (symp != symbolP)
|
||
{
|
||
char *old_loop = loop;
|
||
|
||
symp = symbol_get_value_expression (symp)->X_add_symbol;
|
||
loop = concat (loop, " => ", S_GET_NAME (symp),
|
||
(const char *) NULL);
|
||
free (old_loop);
|
||
}
|
||
|
||
as_bad (_("%s: would close weakref loop: %s"),
|
||
S_GET_NAME (symbolP), loop);
|
||
|
||
free (loop);
|
||
free (name);
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
/* Short-circuiting instead of just checking here might speed
|
||
things up a tiny little bit, but loop error messages would
|
||
miss intermediate links. */
|
||
/* symbolP2 = symp; */
|
||
}
|
||
|
||
memset (&exp, 0, sizeof (exp));
|
||
exp.X_op = O_symbol;
|
||
exp.X_add_symbol = symbolP2;
|
||
|
||
S_SET_SEGMENT (symbolP, undefined_section);
|
||
symbol_set_value_expression (symbolP, &exp);
|
||
symbol_set_frag (symbolP, &zero_address_frag);
|
||
S_SET_WEAKREFR (symbolP);
|
||
|
||
demand_empty_rest_of_line ();
|
||
free (name);
|
||
return;
|
||
|
||
err_out:
|
||
ignore_rest_of_line ();
|
||
free (name);
|
||
return;
|
||
}
|
||
|
||
|
||
/* Verify that we are at the end of a line. If not, issue an error and
|
||
skip to EOL. */
|
||
|
||
void
|
||
demand_empty_rest_of_line (void)
|
||
{
|
||
SKIP_WHITESPACE ();
|
||
if (is_end_of_line[(unsigned char) *input_line_pointer])
|
||
input_line_pointer++;
|
||
else
|
||
{
|
||
if (ISPRINT (*input_line_pointer))
|
||
as_bad (_("junk at end of line, first unrecognized character is `%c'"),
|
||
*input_line_pointer);
|
||
else
|
||
as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
|
||
*input_line_pointer);
|
||
ignore_rest_of_line ();
|
||
}
|
||
|
||
/* Return pointing just after end-of-line. */
|
||
know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
|
||
}
|
||
|
||
/* Silently advance to the end of line. Use this after already having
|
||
issued an error about something bad. */
|
||
|
||
void
|
||
ignore_rest_of_line (void)
|
||
{
|
||
while (input_line_pointer < buffer_limit
|
||
&& !is_end_of_line[(unsigned char) *input_line_pointer])
|
||
input_line_pointer++;
|
||
|
||
input_line_pointer++;
|
||
|
||
/* Return pointing just after end-of-line. */
|
||
know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
|
||
}
|
||
|
||
/* Sets frag for given symbol to zero_address_frag, except when the
|
||
symbol frag is already set to a dummy listing frag. */
|
||
|
||
static void
|
||
set_zero_frag (symbolS *symbolP)
|
||
{
|
||
if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
|
||
symbol_set_frag (symbolP, &zero_address_frag);
|
||
}
|
||
|
||
/* In: Pointer to a symbol.
|
||
Input_line_pointer->expression.
|
||
|
||
Out: Input_line_pointer->just after any whitespace after expression.
|
||
Tried to set symbol to value of expression.
|
||
Will change symbols type, value, and frag; */
|
||
|
||
void
|
||
pseudo_set (symbolS *symbolP)
|
||
{
|
||
expressionS exp;
|
||
segT seg;
|
||
|
||
know (symbolP); /* NULL pointer is logic error. */
|
||
|
||
if (!S_IS_FORWARD_REF (symbolP))
|
||
(void) expression (&exp);
|
||
else
|
||
(void) deferred_expression (&exp);
|
||
|
||
if (exp.X_op == O_illegal)
|
||
as_bad (_("illegal expression"));
|
||
else if (exp.X_op == O_absent)
|
||
as_bad (_("missing expression"));
|
||
else if (exp.X_op == O_big)
|
||
{
|
||
if (exp.X_add_number > 0)
|
||
as_bad (_("bignum invalid"));
|
||
else
|
||
as_bad (_("floating point number invalid"));
|
||
}
|
||
else if (exp.X_op == O_subtract
|
||
&& !S_IS_FORWARD_REF (symbolP)
|
||
&& SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
|
||
&& (symbol_get_frag (exp.X_add_symbol)
|
||
== symbol_get_frag (exp.X_op_symbol)))
|
||
{
|
||
exp.X_op = O_constant;
|
||
exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
|
||
- S_GET_VALUE (exp.X_op_symbol));
|
||
}
|
||
|
||
if (symbol_section_p (symbolP))
|
||
{
|
||
as_bad ("attempt to set value of section symbol");
|
||
return;
|
||
}
|
||
|
||
switch (exp.X_op)
|
||
{
|
||
case O_illegal:
|
||
case O_absent:
|
||
case O_big:
|
||
exp.X_add_number = 0;
|
||
/* Fall through. */
|
||
case O_constant:
|
||
S_SET_SEGMENT (symbolP, absolute_section);
|
||
S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
|
||
set_zero_frag (symbolP);
|
||
break;
|
||
|
||
case O_register:
|
||
#ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
|
||
if (S_IS_EXTERNAL (symbolP))
|
||
{
|
||
as_bad ("can't equate global symbol `%s' with register name",
|
||
S_GET_NAME (symbolP));
|
||
return;
|
||
}
|
||
#endif
|
||
S_SET_SEGMENT (symbolP, reg_section);
|
||
S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
|
||
set_zero_frag (symbolP);
|
||
symbol_get_value_expression (symbolP)->X_op = O_register;
|
||
break;
|
||
|
||
case O_symbol:
|
||
seg = S_GET_SEGMENT (exp.X_add_symbol);
|
||
/* For x=undef+const, create an expression symbol.
|
||
For x=x+const, just update x except when x is an undefined symbol
|
||
For x=defined+const, evaluate x. */
|
||
if (symbolP == exp.X_add_symbol
|
||
&& (seg != undefined_section
|
||
|| !symbol_constant_p (symbolP)))
|
||
{
|
||
*symbol_X_add_number (symbolP) += exp.X_add_number;
|
||
break;
|
||
}
|
||
else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
|
||
{
|
||
symbolS *s = exp.X_add_symbol;
|
||
|
||
if (S_IS_COMMON (s))
|
||
as_bad (_("`%s' can't be equated to common symbol `%s'"),
|
||
S_GET_NAME (symbolP), S_GET_NAME (s));
|
||
|
||
S_SET_SEGMENT (symbolP, seg);
|
||
S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
|
||
symbol_set_frag (symbolP, symbol_get_frag (s));
|
||
copy_symbol_attributes (symbolP, s);
|
||
break;
|
||
}
|
||
S_SET_SEGMENT (symbolP, undefined_section);
|
||
symbol_set_value_expression (symbolP, &exp);
|
||
copy_symbol_attributes (symbolP, exp.X_add_symbol);
|
||
set_zero_frag (symbolP);
|
||
break;
|
||
|
||
default:
|
||
/* The value is some complex expression. */
|
||
S_SET_SEGMENT (symbolP, expr_section);
|
||
symbol_set_value_expression (symbolP, &exp);
|
||
set_zero_frag (symbolP);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* cons()
|
||
|
||
CONStruct more frag of .bytes, or .words etc.
|
||
Should need_pass_2 be 1 then emit no frag(s).
|
||
This understands EXPRESSIONS.
|
||
|
||
Bug (?)
|
||
|
||
This has a split personality. We use expression() to read the
|
||
value. We can detect if the value won't fit in a byte or word.
|
||
But we can't detect if expression() discarded significant digits
|
||
in the case of a long. Not worth the crocks required to fix it. */
|
||
|
||
/* Select a parser for cons expressions. */
|
||
|
||
/* Some targets need to parse the expression in various fancy ways.
|
||
You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
|
||
(for example, the HPPA does this). Otherwise, you can define
|
||
REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
|
||
are defined, which is the normal case, then only simple expressions
|
||
are permitted. */
|
||
|
||
#ifdef TC_M68K
|
||
static void
|
||
parse_mri_cons (expressionS *exp, unsigned int nbytes);
|
||
#endif
|
||
|
||
#ifndef TC_PARSE_CONS_EXPRESSION
|
||
#ifdef REPEAT_CONS_EXPRESSIONS
|
||
#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
|
||
(parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
|
||
static void
|
||
parse_repeat_cons (expressionS *exp, unsigned int nbytes);
|
||
#endif
|
||
|
||
/* If we haven't gotten one yet, just call expression. */
|
||
#ifndef TC_PARSE_CONS_EXPRESSION
|
||
#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
|
||
(expression (EXP), TC_PARSE_CONS_RETURN_NONE)
|
||
#endif
|
||
#endif
|
||
|
||
void
|
||
do_parse_cons_expression (expressionS *exp,
|
||
int nbytes ATTRIBUTE_UNUSED)
|
||
{
|
||
(void) TC_PARSE_CONS_EXPRESSION (exp, nbytes);
|
||
}
|
||
|
||
|
||
/* Worker to do .byte etc statements.
|
||
Clobbers input_line_pointer and checks end-of-line. */
|
||
|
||
static void
|
||
cons_worker (int nbytes, /* 1=.byte, 2=.word, 4=.long. */
|
||
int rva)
|
||
{
|
||
int c;
|
||
expressionS exp;
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
if (is_it_end_of_statement ())
|
||
{
|
||
demand_empty_rest_of_line ();
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
return;
|
||
}
|
||
|
||
#ifdef TC_ADDRESS_BYTES
|
||
if (nbytes == 0)
|
||
nbytes = TC_ADDRESS_BYTES ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (nbytes);
|
||
#endif
|
||
|
||
c = 0;
|
||
do
|
||
{
|
||
TC_PARSE_CONS_RETURN_TYPE ret = TC_PARSE_CONS_RETURN_NONE;
|
||
#ifdef TC_CONS_FIX_CHECK
|
||
fixS **cur_fix = &frchain_now->fix_tail;
|
||
|
||
if (*cur_fix != NULL)
|
||
cur_fix = &(*cur_fix)->fx_next;
|
||
#endif
|
||
|
||
#ifdef TC_M68K
|
||
if (flag_m68k_mri)
|
||
parse_mri_cons (&exp, (unsigned int) nbytes);
|
||
else
|
||
#endif
|
||
{
|
||
#if 0
|
||
if (*input_line_pointer == '"')
|
||
{
|
||
as_bad (_("unexpected `\"' in expression"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
#endif
|
||
ret = TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
|
||
}
|
||
|
||
if (rva)
|
||
{
|
||
if (exp.X_op == O_symbol)
|
||
exp.X_op = O_symbol_rva;
|
||
else
|
||
as_fatal (_("rva without symbol"));
|
||
}
|
||
emit_expr_with_reloc (&exp, (unsigned int) nbytes, ret);
|
||
#ifdef TC_CONS_FIX_CHECK
|
||
TC_CONS_FIX_CHECK (&exp, nbytes, *cur_fix);
|
||
#endif
|
||
++c;
|
||
}
|
||
while (*input_line_pointer++ == ',');
|
||
|
||
/* In MRI mode, after an odd number of bytes, we must align to an
|
||
even word boundary, unless the next instruction is a dc.b, ds.b
|
||
or dcb.b. */
|
||
if (flag_mri && nbytes == 1 && (c & 1) != 0)
|
||
mri_pending_align = 1;
|
||
|
||
input_line_pointer--; /* Put terminator back into stream. */
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
void
|
||
cons (int size)
|
||
{
|
||
cons_worker (size, 0);
|
||
}
|
||
|
||
void
|
||
s_rva (int size)
|
||
{
|
||
cons_worker (size, 1);
|
||
}
|
||
|
||
/* .reloc offset, reloc_name, symbol+addend. */
|
||
|
||
static void
|
||
s_reloc (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
expressionS exp;
|
||
char *r_name;
|
||
int c;
|
||
struct reloc_list *reloc;
|
||
struct _bfd_rel { const char * name; bfd_reloc_code_real_type code; };
|
||
static struct _bfd_rel bfd_relocs[] =
|
||
{
|
||
{ "NONE", BFD_RELOC_NONE },
|
||
{ "8", BFD_RELOC_8 },
|
||
{ "16", BFD_RELOC_16 },
|
||
{ "32", BFD_RELOC_32 },
|
||
{ "64", BFD_RELOC_64 }
|
||
};
|
||
|
||
reloc = XNEW (struct reloc_list);
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
expression (&exp);
|
||
switch (exp.X_op)
|
||
{
|
||
case O_illegal:
|
||
case O_absent:
|
||
case O_big:
|
||
case O_register:
|
||
as_bad (_("missing or bad offset expression"));
|
||
goto err_out;
|
||
case O_constant:
|
||
exp.X_add_symbol = section_symbol (now_seg);
|
||
exp.X_op = O_symbol;
|
||
/* Fallthru */
|
||
case O_symbol:
|
||
if (exp.X_add_number == 0)
|
||
{
|
||
reloc->u.a.offset_sym = exp.X_add_symbol;
|
||
break;
|
||
}
|
||
/* Fallthru */
|
||
default:
|
||
reloc->u.a.offset_sym = make_expr_symbol (&exp);
|
||
break;
|
||
}
|
||
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
as_bad (_("missing reloc type"));
|
||
goto err_out;
|
||
}
|
||
|
||
++input_line_pointer;
|
||
SKIP_WHITESPACE ();
|
||
c = get_symbol_name (& r_name);
|
||
if (strncasecmp (r_name, "BFD_RELOC_", 10) == 0)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (reloc->u.a.howto = NULL, i = 0; i < ARRAY_SIZE (bfd_relocs); i++)
|
||
if (strcasecmp (r_name + 10, bfd_relocs[i].name) == 0)
|
||
{
|
||
reloc->u.a.howto = bfd_reloc_type_lookup (stdoutput,
|
||
bfd_relocs[i].code);
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
|
||
*input_line_pointer = c;
|
||
if (reloc->u.a.howto == NULL)
|
||
{
|
||
as_bad (_("unrecognized reloc type"));
|
||
goto err_out;
|
||
}
|
||
|
||
exp.X_op = O_absent;
|
||
SKIP_WHITESPACE_AFTER_NAME ();
|
||
if (*input_line_pointer == ',')
|
||
{
|
||
++input_line_pointer;
|
||
expression (&exp);
|
||
}
|
||
switch (exp.X_op)
|
||
{
|
||
case O_illegal:
|
||
case O_big:
|
||
case O_register:
|
||
as_bad (_("bad reloc expression"));
|
||
err_out:
|
||
ignore_rest_of_line ();
|
||
free (reloc);
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
return;
|
||
case O_absent:
|
||
reloc->u.a.sym = NULL;
|
||
reloc->u.a.addend = 0;
|
||
break;
|
||
case O_constant:
|
||
reloc->u.a.sym = NULL;
|
||
reloc->u.a.addend = exp.X_add_number;
|
||
break;
|
||
case O_symbol:
|
||
reloc->u.a.sym = exp.X_add_symbol;
|
||
reloc->u.a.addend = exp.X_add_number;
|
||
break;
|
||
default:
|
||
reloc->u.a.sym = make_expr_symbol (&exp);
|
||
reloc->u.a.addend = 0;
|
||
break;
|
||
}
|
||
|
||
reloc->file = as_where (&reloc->line);
|
||
reloc->next = reloc_list;
|
||
reloc_list = reloc;
|
||
|
||
demand_empty_rest_of_line ();
|
||
if (flag_mri)
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
|
||
/* Put the contents of expression EXP into the object file using
|
||
NBYTES bytes. If need_pass_2 is 1, this does nothing. */
|
||
|
||
void
|
||
emit_expr (expressionS *exp, unsigned int nbytes)
|
||
{
|
||
emit_expr_with_reloc (exp, nbytes, TC_PARSE_CONS_RETURN_NONE);
|
||
}
|
||
|
||
void
|
||
emit_expr_with_reloc (expressionS *exp,
|
||
unsigned int nbytes,
|
||
TC_PARSE_CONS_RETURN_TYPE reloc)
|
||
{
|
||
operatorT op;
|
||
char *p;
|
||
valueT extra_digit = 0;
|
||
|
||
/* Don't do anything if we are going to make another pass. */
|
||
if (need_pass_2)
|
||
return;
|
||
|
||
frag_grow (nbytes);
|
||
dot_value = frag_now_fix ();
|
||
dot_frag = frag_now;
|
||
|
||
#ifndef NO_LISTING
|
||
#ifdef OBJ_ELF
|
||
/* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
|
||
appear as a four byte positive constant in the .line section,
|
||
followed by a 2 byte 0xffff. Look for that case here. */
|
||
{
|
||
static int dwarf_line = -1;
|
||
|
||
if (strcmp (segment_name (now_seg), ".line") != 0)
|
||
dwarf_line = -1;
|
||
else if (dwarf_line >= 0
|
||
&& nbytes == 2
|
||
&& exp->X_op == O_constant
|
||
&& (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
|
||
listing_source_line ((unsigned int) dwarf_line);
|
||
else if (nbytes == 4
|
||
&& exp->X_op == O_constant
|
||
&& exp->X_add_number >= 0)
|
||
dwarf_line = exp->X_add_number;
|
||
else
|
||
dwarf_line = -1;
|
||
}
|
||
|
||
/* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
|
||
appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
|
||
AT_sibling (0x12) followed by a four byte address of the sibling
|
||
followed by a 2 byte AT_name (0x38) followed by the name of the
|
||
file. We look for that case here. */
|
||
{
|
||
static int dwarf_file = 0;
|
||
|
||
if (strcmp (segment_name (now_seg), ".debug") != 0)
|
||
dwarf_file = 0;
|
||
else if (dwarf_file == 0
|
||
&& nbytes == 2
|
||
&& exp->X_op == O_constant
|
||
&& exp->X_add_number == 0x11)
|
||
dwarf_file = 1;
|
||
else if (dwarf_file == 1
|
||
&& nbytes == 2
|
||
&& exp->X_op == O_constant
|
||
&& exp->X_add_number == 0x12)
|
||
dwarf_file = 2;
|
||
else if (dwarf_file == 2
|
||
&& nbytes == 4)
|
||
dwarf_file = 3;
|
||
else if (dwarf_file == 3
|
||
&& nbytes == 2
|
||
&& exp->X_op == O_constant
|
||
&& exp->X_add_number == 0x38)
|
||
dwarf_file = 4;
|
||
else
|
||
dwarf_file = 0;
|
||
|
||
/* The variable dwarf_file_string tells stringer that the string
|
||
may be the name of the source file. */
|
||
if (dwarf_file == 4)
|
||
dwarf_file_string = 1;
|
||
else
|
||
dwarf_file_string = 0;
|
||
}
|
||
#endif
|
||
#endif
|
||
|
||
if (check_eh_frame (exp, &nbytes))
|
||
return;
|
||
|
||
op = exp->X_op;
|
||
|
||
/* Handle a negative bignum. */
|
||
if (op == O_uminus
|
||
&& exp->X_add_number == 0
|
||
&& symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
|
||
&& symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
|
||
{
|
||
int i;
|
||
unsigned long carry;
|
||
|
||
exp = symbol_get_value_expression (exp->X_add_symbol);
|
||
|
||
/* Negate the bignum: one's complement each digit and add 1. */
|
||
carry = 1;
|
||
for (i = 0; i < exp->X_add_number; i++)
|
||
{
|
||
unsigned long next;
|
||
|
||
next = (((~(generic_bignum[i] & LITTLENUM_MASK))
|
||
& LITTLENUM_MASK)
|
||
+ carry);
|
||
generic_bignum[i] = next & LITTLENUM_MASK;
|
||
carry = next >> LITTLENUM_NUMBER_OF_BITS;
|
||
}
|
||
|
||
/* We can ignore any carry out, because it will be handled by
|
||
extra_digit if it is needed. */
|
||
|
||
extra_digit = (valueT) -1;
|
||
op = O_big;
|
||
}
|
||
|
||
if (op == O_absent || op == O_illegal)
|
||
{
|
||
as_warn (_("zero assumed for missing expression"));
|
||
exp->X_add_number = 0;
|
||
op = O_constant;
|
||
}
|
||
else if (op == O_big && exp->X_add_number <= 0)
|
||
{
|
||
as_bad (_("floating point number invalid"));
|
||
exp->X_add_number = 0;
|
||
op = O_constant;
|
||
}
|
||
else if (op == O_register)
|
||
{
|
||
as_warn (_("register value used as expression"));
|
||
op = O_constant;
|
||
}
|
||
|
||
/* Allow `.word 0' in the absolute section. */
|
||
if (now_seg == absolute_section)
|
||
{
|
||
if (op != O_constant || exp->X_add_number != 0)
|
||
as_bad (_("attempt to store value in absolute section"));
|
||
abs_section_offset += nbytes;
|
||
return;
|
||
}
|
||
|
||
/* Allow `.word 0' in BSS style sections. */
|
||
if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
|
||
as_bad (_("attempt to store non-zero value in section `%s'"),
|
||
segment_name (now_seg));
|
||
|
||
p = frag_more ((int) nbytes);
|
||
|
||
if (reloc != TC_PARSE_CONS_RETURN_NONE)
|
||
{
|
||
emit_expr_fix (exp, nbytes, frag_now, p, reloc);
|
||
return;
|
||
}
|
||
|
||
#ifndef WORKING_DOT_WORD
|
||
/* If we have the difference of two symbols in a word, save it on
|
||
the broken_words list. See the code in write.c. */
|
||
if (op == O_subtract && nbytes == 2)
|
||
{
|
||
struct broken_word *x;
|
||
|
||
x = XNEW (struct broken_word);
|
||
x->next_broken_word = broken_words;
|
||
broken_words = x;
|
||
x->seg = now_seg;
|
||
x->subseg = now_subseg;
|
||
x->frag = frag_now;
|
||
x->word_goes_here = p;
|
||
x->dispfrag = 0;
|
||
x->add = exp->X_add_symbol;
|
||
x->sub = exp->X_op_symbol;
|
||
x->addnum = exp->X_add_number;
|
||
x->added = 0;
|
||
x->use_jump = 0;
|
||
new_broken_words++;
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
/* If we have an integer, but the number of bytes is too large to
|
||
pass to md_number_to_chars, handle it as a bignum. */
|
||
if (op == O_constant && nbytes > sizeof (valueT))
|
||
{
|
||
extra_digit = exp->X_unsigned ? 0 : -1;
|
||
convert_to_bignum (exp, !exp->X_unsigned);
|
||
op = O_big;
|
||
}
|
||
|
||
if (op == O_constant)
|
||
{
|
||
valueT get;
|
||
valueT use;
|
||
valueT mask;
|
||
valueT hibit;
|
||
valueT unmask;
|
||
|
||
/* JF << of >= number of bits in the object is undefined. In
|
||
particular SPARC (Sun 4) has problems. */
|
||
if (nbytes >= sizeof (valueT))
|
||
{
|
||
mask = 0;
|
||
if (nbytes > sizeof (valueT))
|
||
hibit = 0;
|
||
else
|
||
hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
|
||
}
|
||
else
|
||
{
|
||
/* Don't store these bits. */
|
||
mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
|
||
hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
|
||
}
|
||
|
||
unmask = ~mask; /* Do store these bits. */
|
||
|
||
#ifdef NEVER
|
||
"Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
|
||
mask = ~(unmask >> 1); /* Includes sign bit now. */
|
||
#endif
|
||
|
||
get = exp->X_add_number;
|
||
use = get & unmask;
|
||
if ((get & mask) != 0
|
||
&& ((get & mask) != mask
|
||
|| (get & hibit) == 0))
|
||
{
|
||
/* Leading bits contain both 0s & 1s. */
|
||
#if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
|
||
#ifndef __MSVCRT__
|
||
as_warn (_("value 0x%llx truncated to 0x%llx"),
|
||
(unsigned long long) get, (unsigned long long) use);
|
||
#else
|
||
as_warn (_("value 0x%I64x truncated to 0x%I64x"),
|
||
(unsigned long long) get, (unsigned long long) use);
|
||
#endif
|
||
#else
|
||
as_warn (_("value 0x%lx truncated to 0x%lx"),
|
||
(unsigned long) get, (unsigned long) use);
|
||
#endif
|
||
}
|
||
/* Put bytes in right order. */
|
||
md_number_to_chars (p, use, (int) nbytes);
|
||
}
|
||
else if (op == O_big)
|
||
{
|
||
unsigned int size;
|
||
LITTLENUM_TYPE *nums;
|
||
|
||
size = exp->X_add_number * CHARS_PER_LITTLENUM;
|
||
if (nbytes < size)
|
||
{
|
||
int i = nbytes / CHARS_PER_LITTLENUM;
|
||
|
||
if (i != 0)
|
||
{
|
||
LITTLENUM_TYPE sign = 0;
|
||
if ((generic_bignum[--i]
|
||
& (1 << (LITTLENUM_NUMBER_OF_BITS - 1))) != 0)
|
||
sign = ~(LITTLENUM_TYPE) 0;
|
||
|
||
while (++i < exp->X_add_number)
|
||
if (generic_bignum[i] != sign)
|
||
break;
|
||
}
|
||
else if (nbytes == 1)
|
||
{
|
||
/* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably).
|
||
Check that bits 8.. of generic_bignum[0] match bit 7
|
||
and that they match all of generic_bignum[1..exp->X_add_number]. */
|
||
LITTLENUM_TYPE sign = (generic_bignum[0] & (1 << 7)) ? -1 : 0;
|
||
LITTLENUM_TYPE himask = LITTLENUM_MASK & ~ 0xFF;
|
||
|
||
if ((generic_bignum[0] & himask) == (sign & himask))
|
||
{
|
||
while (++i < exp->X_add_number)
|
||
if (generic_bignum[i] != sign)
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (i < exp->X_add_number)
|
||
as_warn (ngettext ("bignum truncated to %d byte",
|
||
"bignum truncated to %d bytes",
|
||
nbytes),
|
||
nbytes);
|
||
size = nbytes;
|
||
}
|
||
|
||
if (nbytes == 1)
|
||
{
|
||
md_number_to_chars (p, (valueT) generic_bignum[0], 1);
|
||
return;
|
||
}
|
||
know (nbytes % CHARS_PER_LITTLENUM == 0);
|
||
|
||
if (target_big_endian)
|
||
{
|
||
while (nbytes > size)
|
||
{
|
||
md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
|
||
nbytes -= CHARS_PER_LITTLENUM;
|
||
p += CHARS_PER_LITTLENUM;
|
||
}
|
||
|
||
nums = generic_bignum + size / CHARS_PER_LITTLENUM;
|
||
while (size >= CHARS_PER_LITTLENUM)
|
||
{
|
||
--nums;
|
||
md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
|
||
size -= CHARS_PER_LITTLENUM;
|
||
p += CHARS_PER_LITTLENUM;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
nums = generic_bignum;
|
||
while (size >= CHARS_PER_LITTLENUM)
|
||
{
|
||
md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
|
||
++nums;
|
||
size -= CHARS_PER_LITTLENUM;
|
||
p += CHARS_PER_LITTLENUM;
|
||
nbytes -= CHARS_PER_LITTLENUM;
|
||
}
|
||
|
||
while (nbytes >= CHARS_PER_LITTLENUM)
|
||
{
|
||
md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
|
||
nbytes -= CHARS_PER_LITTLENUM;
|
||
p += CHARS_PER_LITTLENUM;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
emit_expr_fix (exp, nbytes, frag_now, p, TC_PARSE_CONS_RETURN_NONE);
|
||
}
|
||
|
||
void
|
||
emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p,
|
||
TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED)
|
||
{
|
||
int offset = 0;
|
||
unsigned int size = nbytes;
|
||
|
||
memset (p, 0, size);
|
||
|
||
/* Generate a fixS to record the symbol value. */
|
||
|
||
#ifdef TC_CONS_FIX_NEW
|
||
TC_CONS_FIX_NEW (frag, p - frag->fr_literal + offset, size, exp, r);
|
||
#else
|
||
if (r != TC_PARSE_CONS_RETURN_NONE)
|
||
{
|
||
reloc_howto_type *reloc_howto;
|
||
|
||
reloc_howto = bfd_reloc_type_lookup (stdoutput, r);
|
||
size = bfd_get_reloc_size (reloc_howto);
|
||
|
||
if (size > nbytes)
|
||
{
|
||
as_bad (ngettext ("%s relocations do not fit in %u byte",
|
||
"%s relocations do not fit in %u bytes",
|
||
nbytes),
|
||
reloc_howto->name, nbytes);
|
||
return;
|
||
}
|
||
else if (target_big_endian)
|
||
offset = nbytes - size;
|
||
}
|
||
else
|
||
switch (size)
|
||
{
|
||
case 1:
|
||
r = BFD_RELOC_8;
|
||
break;
|
||
case 2:
|
||
r = BFD_RELOC_16;
|
||
break;
|
||
case 3:
|
||
r = BFD_RELOC_24;
|
||
break;
|
||
case 4:
|
||
r = BFD_RELOC_32;
|
||
break;
|
||
case 8:
|
||
r = BFD_RELOC_64;
|
||
break;
|
||
default:
|
||
as_bad (_("unsupported BFD relocation size %u"), size);
|
||
return;
|
||
}
|
||
fix_new_exp (frag, p - frag->fr_literal + offset, size,
|
||
exp, 0, r);
|
||
#endif
|
||
}
|
||
|
||
/* Handle an MRI style string expression. */
|
||
|
||
#ifdef TC_M68K
|
||
static void
|
||
parse_mri_cons (expressionS *exp, unsigned int nbytes)
|
||
{
|
||
if (*input_line_pointer != '\''
|
||
&& (input_line_pointer[1] != '\''
|
||
|| (*input_line_pointer != 'A'
|
||
&& *input_line_pointer != 'E')))
|
||
(void) TC_PARSE_CONS_EXPRESSION (exp, nbytes);
|
||
else
|
||
{
|
||
unsigned int scan;
|
||
unsigned int result = 0;
|
||
|
||
/* An MRI style string. Cut into as many bytes as will fit into
|
||
a nbyte chunk, left justify if necessary, and separate with
|
||
commas so we can try again later. */
|
||
if (*input_line_pointer == 'A')
|
||
++input_line_pointer;
|
||
else if (*input_line_pointer == 'E')
|
||
{
|
||
as_bad (_("EBCDIC constants are not supported"));
|
||
++input_line_pointer;
|
||
}
|
||
|
||
input_line_pointer++;
|
||
for (scan = 0; scan < nbytes; scan++)
|
||
{
|
||
if (*input_line_pointer == '\'')
|
||
{
|
||
if (input_line_pointer[1] == '\'')
|
||
{
|
||
input_line_pointer++;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
result = (result << 8) | (*input_line_pointer++);
|
||
}
|
||
|
||
/* Left justify. */
|
||
while (scan < nbytes)
|
||
{
|
||
result <<= 8;
|
||
scan++;
|
||
}
|
||
|
||
/* Create correct expression. */
|
||
exp->X_op = O_constant;
|
||
exp->X_add_number = result;
|
||
|
||
/* Fake it so that we can read the next char too. */
|
||
if (input_line_pointer[0] != '\'' ||
|
||
(input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
|
||
{
|
||
input_line_pointer -= 2;
|
||
input_line_pointer[0] = ',';
|
||
input_line_pointer[1] = '\'';
|
||
}
|
||
else
|
||
input_line_pointer++;
|
||
}
|
||
}
|
||
#endif /* TC_M68K */
|
||
|
||
#ifdef REPEAT_CONS_EXPRESSIONS
|
||
|
||
/* Parse a repeat expression for cons. This is used by the MIPS
|
||
assembler. The format is NUMBER:COUNT; NUMBER appears in the
|
||
object file COUNT times.
|
||
|
||
To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
|
||
|
||
static void
|
||
parse_repeat_cons (expressionS *exp, unsigned int nbytes)
|
||
{
|
||
expressionS count;
|
||
int i;
|
||
|
||
expression (exp);
|
||
|
||
if (*input_line_pointer != ':')
|
||
{
|
||
/* No repeat count. */
|
||
return;
|
||
}
|
||
|
||
++input_line_pointer;
|
||
expression (&count);
|
||
if (count.X_op != O_constant
|
||
|| count.X_add_number <= 0)
|
||
{
|
||
as_warn (_("unresolvable or nonpositive repeat count; using 1"));
|
||
return;
|
||
}
|
||
|
||
/* The cons function is going to output this expression once. So we
|
||
output it count - 1 times. */
|
||
for (i = count.X_add_number - 1; i > 0; i--)
|
||
emit_expr (exp, nbytes);
|
||
}
|
||
|
||
#endif /* REPEAT_CONS_EXPRESSIONS */
|
||
|
||
/* Parse a floating point number represented as a hex constant. This
|
||
permits users to specify the exact bits they want in the floating
|
||
point number. */
|
||
|
||
static int
|
||
hex_float (int float_type, char *bytes)
|
||
{
|
||
int length;
|
||
int i;
|
||
|
||
switch (float_type)
|
||
{
|
||
case 'f':
|
||
case 'F':
|
||
case 's':
|
||
case 'S':
|
||
length = 4;
|
||
break;
|
||
|
||
case 'd':
|
||
case 'D':
|
||
case 'r':
|
||
case 'R':
|
||
length = 8;
|
||
break;
|
||
|
||
case 'x':
|
||
case 'X':
|
||
length = 12;
|
||
break;
|
||
|
||
case 'p':
|
||
case 'P':
|
||
length = 12;
|
||
break;
|
||
|
||
default:
|
||
as_bad (_("unknown floating type type '%c'"), float_type);
|
||
return -1;
|
||
}
|
||
|
||
/* It would be nice if we could go through expression to parse the
|
||
hex constant, but if we get a bignum it's a pain to sort it into
|
||
the buffer correctly. */
|
||
i = 0;
|
||
while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
|
||
{
|
||
int d;
|
||
|
||
/* The MRI assembler accepts arbitrary underscores strewn about
|
||
through the hex constant, so we ignore them as well. */
|
||
if (*input_line_pointer == '_')
|
||
{
|
||
++input_line_pointer;
|
||
continue;
|
||
}
|
||
|
||
if (i >= length)
|
||
{
|
||
as_warn (_("floating point constant too large"));
|
||
return -1;
|
||
}
|
||
d = hex_value (*input_line_pointer) << 4;
|
||
++input_line_pointer;
|
||
while (*input_line_pointer == '_')
|
||
++input_line_pointer;
|
||
if (hex_p (*input_line_pointer))
|
||
{
|
||
d += hex_value (*input_line_pointer);
|
||
++input_line_pointer;
|
||
}
|
||
if (target_big_endian)
|
||
bytes[i] = d;
|
||
else
|
||
bytes[length - i - 1] = d;
|
||
++i;
|
||
}
|
||
|
||
if (i < length)
|
||
{
|
||
if (target_big_endian)
|
||
memset (bytes + i, 0, length - i);
|
||
else
|
||
memset (bytes, 0, length - i);
|
||
}
|
||
|
||
return length;
|
||
}
|
||
|
||
/* float_cons()
|
||
|
||
CONStruct some more frag chars of .floats .ffloats etc.
|
||
Makes 0 or more new frags.
|
||
If need_pass_2 == 1, no frags are emitted.
|
||
This understands only floating literals, not expressions. Sorry.
|
||
|
||
A floating constant is defined by atof_generic(), except it is preceded
|
||
by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
|
||
reading, I decided to be incompatible. This always tries to give you
|
||
rounded bits to the precision of the pseudo-op. Former AS did premature
|
||
truncation, restored noisy bits instead of trailing 0s AND gave you
|
||
a choice of 2 flavours of noise according to which of 2 floating-point
|
||
scanners you directed AS to use.
|
||
|
||
In: input_line_pointer->whitespace before, or '0' of flonum. */
|
||
|
||
void
|
||
float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
|
||
int float_type /* 'f':.ffloat ... 'F':.float ... */)
|
||
{
|
||
char *p;
|
||
int length; /* Number of chars in an object. */
|
||
const char *err; /* Error from scanning floating literal. */
|
||
char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
|
||
|
||
if (is_it_end_of_statement ())
|
||
{
|
||
demand_empty_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
if (now_seg == absolute_section)
|
||
{
|
||
as_bad (_("attempt to store float in absolute section"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
if (in_bss ())
|
||
{
|
||
as_bad (_("attempt to store float in section `%s'"),
|
||
segment_name (now_seg));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
do
|
||
{
|
||
/* input_line_pointer->1st char of a flonum (we hope!). */
|
||
SKIP_WHITESPACE ();
|
||
|
||
/* Skip any 0{letter} that may be present. Don't even check if the
|
||
letter is legal. Someone may invent a "z" format and this routine
|
||
has no use for such information. Lusers beware: you get
|
||
diagnostics if your input is ill-conditioned. */
|
||
if (input_line_pointer[0] == '0'
|
||
&& ISALPHA (input_line_pointer[1]))
|
||
input_line_pointer += 2;
|
||
|
||
/* Accept :xxxx, where the x's are hex digits, for a floating
|
||
point with the exact digits specified. */
|
||
if (input_line_pointer[0] == ':')
|
||
{
|
||
++input_line_pointer;
|
||
length = hex_float (float_type, temp);
|
||
if (length < 0)
|
||
{
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
err = md_atof (float_type, temp, &length);
|
||
know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
|
||
know (err != NULL || length > 0);
|
||
if (err)
|
||
{
|
||
as_bad (_("bad floating literal: %s"), err);
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (!need_pass_2)
|
||
{
|
||
int count;
|
||
|
||
count = 1;
|
||
|
||
#ifdef REPEAT_CONS_EXPRESSIONS
|
||
if (*input_line_pointer == ':')
|
||
{
|
||
expressionS count_exp;
|
||
|
||
++input_line_pointer;
|
||
expression (&count_exp);
|
||
|
||
if (count_exp.X_op != O_constant
|
||
|| count_exp.X_add_number <= 0)
|
||
as_warn (_("unresolvable or nonpositive repeat count; using 1"));
|
||
else
|
||
count = count_exp.X_add_number;
|
||
}
|
||
#endif
|
||
|
||
while (--count >= 0)
|
||
{
|
||
p = frag_more (length);
|
||
memcpy (p, temp, (unsigned int) length);
|
||
}
|
||
}
|
||
SKIP_WHITESPACE ();
|
||
}
|
||
while (*input_line_pointer++ == ',');
|
||
|
||
/* Put terminator back into stream. */
|
||
--input_line_pointer;
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* LEB128 Encoding.
|
||
|
||
Note - we are using the DWARF standard's definition of LEB128 encoding
|
||
where each 7-bit value is a stored in a byte, *not* an octet. This
|
||
means that on targets where a byte contains multiple octets there is
|
||
a *huge waste of space*. (This also means that we do not have to
|
||
have special versions of these functions for when OCTETS_PER_BYTE_POWER
|
||
is non-zero).
|
||
|
||
If the 7-bit values were to be packed into N-bit bytes (where N > 8)
|
||
we would then have to consider whether multiple, successive LEB128
|
||
values should be packed into the bytes without padding (bad idea) or
|
||
whether each LEB128 number is padded out to a whole number of bytes.
|
||
Plus you have to decide on the endianness of packing octets into a
|
||
byte. */
|
||
|
||
/* Return the size of a LEB128 value in bytes. */
|
||
|
||
static inline unsigned int
|
||
sizeof_sleb128 (offsetT value)
|
||
{
|
||
int size = 0;
|
||
unsigned byte;
|
||
|
||
do
|
||
{
|
||
byte = (value & 0x7f);
|
||
/* Sadly, we cannot rely on typical arithmetic right shift behaviour.
|
||
Fortunately, we can structure things so that the extra work reduces
|
||
to a noop on systems that do things "properly". */
|
||
value = (value >> 7) | ~(-(offsetT)1 >> 7);
|
||
size += 1;
|
||
}
|
||
while (!(((value == 0) && ((byte & 0x40) == 0))
|
||
|| ((value == -1) && ((byte & 0x40) != 0))));
|
||
|
||
return size;
|
||
}
|
||
|
||
static inline unsigned int
|
||
sizeof_uleb128 (valueT value)
|
||
{
|
||
int size = 0;
|
||
|
||
do
|
||
{
|
||
value >>= 7;
|
||
size += 1;
|
||
}
|
||
while (value != 0);
|
||
|
||
return size;
|
||
}
|
||
|
||
unsigned int
|
||
sizeof_leb128 (valueT value, int sign)
|
||
{
|
||
if (sign)
|
||
return sizeof_sleb128 ((offsetT) value);
|
||
else
|
||
return sizeof_uleb128 (value);
|
||
}
|
||
|
||
/* Output a LEB128 value. Returns the number of bytes used. */
|
||
|
||
static inline unsigned int
|
||
output_sleb128 (char *p, offsetT value)
|
||
{
|
||
char *orig = p;
|
||
int more;
|
||
|
||
do
|
||
{
|
||
unsigned byte = (value & 0x7f);
|
||
|
||
/* Sadly, we cannot rely on typical arithmetic right shift behaviour.
|
||
Fortunately, we can structure things so that the extra work reduces
|
||
to a noop on systems that do things "properly". */
|
||
value = (value >> 7) | ~(-(offsetT)1 >> 7);
|
||
|
||
more = !((((value == 0) && ((byte & 0x40) == 0))
|
||
|| ((value == -1) && ((byte & 0x40) != 0))));
|
||
if (more)
|
||
byte |= 0x80;
|
||
|
||
*p++ = byte;
|
||
}
|
||
while (more);
|
||
|
||
return p - orig;
|
||
}
|
||
|
||
static inline unsigned int
|
||
output_uleb128 (char *p, valueT value)
|
||
{
|
||
char *orig = p;
|
||
|
||
do
|
||
{
|
||
unsigned byte = (value & 0x7f);
|
||
|
||
value >>= 7;
|
||
if (value != 0)
|
||
/* More bytes to follow. */
|
||
byte |= 0x80;
|
||
|
||
*p++ = byte;
|
||
}
|
||
while (value != 0);
|
||
|
||
return p - orig;
|
||
}
|
||
|
||
unsigned int
|
||
output_leb128 (char *p, valueT value, int sign)
|
||
{
|
||
if (sign)
|
||
return output_sleb128 (p, (offsetT) value);
|
||
else
|
||
return output_uleb128 (p, value);
|
||
}
|
||
|
||
/* Do the same for bignums. We combine sizeof with output here in that
|
||
we don't output for NULL values of P. It isn't really as critical as
|
||
for "normal" values that this be streamlined. Returns the number of
|
||
bytes used. */
|
||
|
||
static inline unsigned int
|
||
output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
|
||
{
|
||
char *orig = p;
|
||
valueT val = 0;
|
||
int loaded = 0;
|
||
unsigned byte;
|
||
|
||
/* Strip leading sign extensions off the bignum. */
|
||
while (size > 1
|
||
&& bignum[size - 1] == LITTLENUM_MASK
|
||
&& bignum[size - 2] > LITTLENUM_MASK / 2)
|
||
size--;
|
||
|
||
do
|
||
{
|
||
/* OR in the next part of the littlenum. */
|
||
val |= (*bignum << loaded);
|
||
loaded += LITTLENUM_NUMBER_OF_BITS;
|
||
size--;
|
||
bignum++;
|
||
|
||
/* Add bytes until there are less than 7 bits left in VAL
|
||
or until every non-sign bit has been written. */
|
||
do
|
||
{
|
||
byte = val & 0x7f;
|
||
loaded -= 7;
|
||
val >>= 7;
|
||
if (size > 0
|
||
|| val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
|
||
byte |= 0x80;
|
||
|
||
if (orig)
|
||
*p = byte;
|
||
p++;
|
||
}
|
||
while ((byte & 0x80) != 0 && loaded >= 7);
|
||
}
|
||
while (size > 0);
|
||
|
||
/* Mop up any left-over bits (of which there will be less than 7). */
|
||
if ((byte & 0x80) != 0)
|
||
{
|
||
/* Sign-extend VAL. */
|
||
if (val & (1 << (loaded - 1)))
|
||
val |= ~0U << loaded;
|
||
if (orig)
|
||
*p = val & 0x7f;
|
||
p++;
|
||
}
|
||
|
||
return p - orig;
|
||
}
|
||
|
||
static inline unsigned int
|
||
output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
|
||
{
|
||
char *orig = p;
|
||
valueT val = 0;
|
||
int loaded = 0;
|
||
unsigned byte;
|
||
|
||
/* Strip leading zeros off the bignum. */
|
||
/* XXX: Is this needed? */
|
||
while (size > 0 && bignum[size - 1] == 0)
|
||
size--;
|
||
|
||
do
|
||
{
|
||
if (loaded < 7 && size > 0)
|
||
{
|
||
val |= (*bignum << loaded);
|
||
loaded += 8 * CHARS_PER_LITTLENUM;
|
||
size--;
|
||
bignum++;
|
||
}
|
||
|
||
byte = val & 0x7f;
|
||
loaded -= 7;
|
||
val >>= 7;
|
||
|
||
if (size > 0 || val)
|
||
byte |= 0x80;
|
||
|
||
if (orig)
|
||
*p = byte;
|
||
p++;
|
||
}
|
||
while (byte & 0x80);
|
||
|
||
return p - orig;
|
||
}
|
||
|
||
static unsigned int
|
||
output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size, int sign)
|
||
{
|
||
if (sign)
|
||
return output_big_sleb128 (p, bignum, size);
|
||
else
|
||
return output_big_uleb128 (p, bignum, size);
|
||
}
|
||
|
||
/* Generate the appropriate fragments for a given expression to emit a
|
||
leb128 value. SIGN is 1 for sleb, 0 for uleb. */
|
||
|
||
static void
|
||
emit_leb128_expr (expressionS *exp, int sign)
|
||
{
|
||
operatorT op = exp->X_op;
|
||
unsigned int nbytes;
|
||
|
||
if (op == O_absent || op == O_illegal)
|
||
{
|
||
as_warn (_("zero assumed for missing expression"));
|
||
exp->X_add_number = 0;
|
||
op = O_constant;
|
||
}
|
||
else if (op == O_big && exp->X_add_number <= 0)
|
||
{
|
||
as_bad (_("floating point number invalid"));
|
||
exp->X_add_number = 0;
|
||
op = O_constant;
|
||
}
|
||
else if (op == O_register)
|
||
{
|
||
as_warn (_("register value used as expression"));
|
||
op = O_constant;
|
||
}
|
||
else if (op == O_constant
|
||
&& sign
|
||
&& (exp->X_add_number < 0) == !exp->X_extrabit)
|
||
{
|
||
/* We're outputting a signed leb128 and the sign of X_add_number
|
||
doesn't reflect the sign of the original value. Convert EXP
|
||
to a correctly-extended bignum instead. */
|
||
convert_to_bignum (exp, exp->X_extrabit);
|
||
op = O_big;
|
||
}
|
||
|
||
if (now_seg == absolute_section)
|
||
{
|
||
if (op != O_constant || exp->X_add_number != 0)
|
||
as_bad (_("attempt to store value in absolute section"));
|
||
abs_section_offset++;
|
||
return;
|
||
}
|
||
|
||
if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
|
||
as_bad (_("attempt to store non-zero value in section `%s'"),
|
||
segment_name (now_seg));
|
||
|
||
/* Let check_eh_frame know that data is being emitted. nbytes == -1 is
|
||
a signal that this is leb128 data. It shouldn't optimize this away. */
|
||
nbytes = (unsigned int) -1;
|
||
if (check_eh_frame (exp, &nbytes))
|
||
abort ();
|
||
|
||
/* Let the backend know that subsequent data may be byte aligned. */
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
if (op == O_constant)
|
||
{
|
||
/* If we've got a constant, emit the thing directly right now. */
|
||
|
||
valueT value = exp->X_add_number;
|
||
unsigned int size;
|
||
char *p;
|
||
|
||
size = sizeof_leb128 (value, sign);
|
||
p = frag_more (size);
|
||
if (output_leb128 (p, value, sign) > size)
|
||
abort ();
|
||
}
|
||
else if (op == O_big)
|
||
{
|
||
/* O_big is a different sort of constant. */
|
||
int nbr_digits = exp->X_add_number;
|
||
unsigned int size;
|
||
char *p;
|
||
|
||
/* If the leading littenum is 0xffff, prepend a 0 to avoid confusion with
|
||
a signed number. Unary operators like - or ~ always extend the
|
||
bignum to its largest size. */
|
||
if (exp->X_unsigned
|
||
&& nbr_digits < SIZE_OF_LARGE_NUMBER
|
||
&& generic_bignum[nbr_digits - 1] == LITTLENUM_MASK)
|
||
generic_bignum[nbr_digits++] = 0;
|
||
|
||
size = output_big_leb128 (NULL, generic_bignum, nbr_digits, sign);
|
||
p = frag_more (size);
|
||
if (output_big_leb128 (p, generic_bignum, nbr_digits, sign) > size)
|
||
abort ();
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, we have to create a variable sized fragment and
|
||
resolve things later. */
|
||
|
||
frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
|
||
make_expr_symbol (exp), 0, (char *) NULL);
|
||
}
|
||
}
|
||
|
||
/* Parse the .sleb128 and .uleb128 pseudos. */
|
||
|
||
void
|
||
s_leb128 (int sign)
|
||
{
|
||
expressionS exp;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
do
|
||
{
|
||
deferred_expression (&exp);
|
||
emit_leb128_expr (&exp, sign);
|
||
}
|
||
while (*input_line_pointer++ == ',');
|
||
|
||
input_line_pointer--;
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
static void
|
||
stringer_append_char (int c, int bitsize)
|
||
{
|
||
if (c && in_bss ())
|
||
as_bad (_("attempt to store non-empty string in section `%s'"),
|
||
segment_name (now_seg));
|
||
|
||
if (!target_big_endian)
|
||
FRAG_APPEND_1_CHAR (c);
|
||
|
||
switch (bitsize)
|
||
{
|
||
case 64:
|
||
FRAG_APPEND_1_CHAR (0);
|
||
FRAG_APPEND_1_CHAR (0);
|
||
FRAG_APPEND_1_CHAR (0);
|
||
FRAG_APPEND_1_CHAR (0);
|
||
/* Fall through. */
|
||
case 32:
|
||
FRAG_APPEND_1_CHAR (0);
|
||
FRAG_APPEND_1_CHAR (0);
|
||
/* Fall through. */
|
||
case 16:
|
||
FRAG_APPEND_1_CHAR (0);
|
||
/* Fall through. */
|
||
case 8:
|
||
break;
|
||
default:
|
||
/* Called with invalid bitsize argument. */
|
||
abort ();
|
||
break;
|
||
}
|
||
if (target_big_endian)
|
||
FRAG_APPEND_1_CHAR (c);
|
||
}
|
||
|
||
/* Worker to do .ascii etc statements.
|
||
Reads 0 or more ',' separated, double-quoted strings.
|
||
Caller should have checked need_pass_2 is FALSE because we don't
|
||
check it.
|
||
Checks for end-of-line.
|
||
BITS_APPENDZERO says how many bits are in a target char.
|
||
The bottom bit is set if a NUL char should be appended to the strings. */
|
||
|
||
void
|
||
stringer (int bits_appendzero)
|
||
{
|
||
const int bitsize = bits_appendzero & ~7;
|
||
const int append_zero = bits_appendzero & 1;
|
||
unsigned int c;
|
||
#if !defined(NO_LISTING) && defined (OBJ_ELF)
|
||
char *start;
|
||
#endif
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
/* If we have been switched into the abs_section then we
|
||
will not have an obstack onto which we can hang strings. */
|
||
if (now_seg == absolute_section)
|
||
{
|
||
as_bad (_("strings must be placed into a section"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
/* The following awkward logic is to parse ZERO or more strings,
|
||
comma separated. Recall a string expression includes spaces
|
||
before the opening '\"' and spaces after the closing '\"'.
|
||
We fake a leading ',' if there is (supposed to be)
|
||
a 1st, expression. We keep demanding expressions for each ','. */
|
||
if (is_it_end_of_statement ())
|
||
{
|
||
c = 0; /* Skip loop. */
|
||
++input_line_pointer; /* Compensate for end of loop. */
|
||
}
|
||
else
|
||
{
|
||
c = ','; /* Do loop. */
|
||
}
|
||
|
||
while (c == ',' || c == '<' || c == '"')
|
||
{
|
||
SKIP_WHITESPACE ();
|
||
switch (*input_line_pointer)
|
||
{
|
||
case '\"':
|
||
++input_line_pointer; /*->1st char of string. */
|
||
#if !defined(NO_LISTING) && defined (OBJ_ELF)
|
||
start = input_line_pointer;
|
||
#endif
|
||
|
||
while (is_a_char (c = next_char_of_string ()))
|
||
stringer_append_char (c, bitsize);
|
||
|
||
if (append_zero)
|
||
stringer_append_char (0, bitsize);
|
||
|
||
know (input_line_pointer[-1] == '\"');
|
||
|
||
#if !defined(NO_LISTING) && defined (OBJ_ELF)
|
||
/* In ELF, when gcc is emitting DWARF 1 debugging output, it
|
||
will emit .string with a filename in the .debug section
|
||
after a sequence of constants. See the comment in
|
||
emit_expr for the sequence. emit_expr will set
|
||
dwarf_file_string to non-zero if this string might be a
|
||
source file name. */
|
||
if (strcmp (segment_name (now_seg), ".debug") != 0)
|
||
dwarf_file_string = 0;
|
||
else if (dwarf_file_string)
|
||
{
|
||
c = input_line_pointer[-1];
|
||
input_line_pointer[-1] = '\0';
|
||
listing_source_file (start);
|
||
input_line_pointer[-1] = c;
|
||
}
|
||
#endif
|
||
|
||
break;
|
||
case '<':
|
||
input_line_pointer++;
|
||
c = get_single_number ();
|
||
stringer_append_char (c, bitsize);
|
||
if (*input_line_pointer != '>')
|
||
as_bad (_("expected <nn>"));
|
||
|
||
input_line_pointer++;
|
||
break;
|
||
case ',':
|
||
input_line_pointer++;
|
||
break;
|
||
}
|
||
SKIP_WHITESPACE ();
|
||
c = *input_line_pointer;
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
/* FIXME-SOMEDAY: I had trouble here on characters with the
|
||
high bits set. We'll probably also have trouble with
|
||
multibyte chars, wide chars, etc. Also be careful about
|
||
returning values bigger than 1 byte. xoxorich. */
|
||
|
||
unsigned int
|
||
next_char_of_string (void)
|
||
{
|
||
unsigned int c;
|
||
|
||
c = *input_line_pointer++ & CHAR_MASK;
|
||
switch (c)
|
||
{
|
||
case 0:
|
||
/* PR 20902: Do not advance past the end of the buffer. */
|
||
-- input_line_pointer;
|
||
c = NOT_A_CHAR;
|
||
break;
|
||
|
||
case '\"':
|
||
c = NOT_A_CHAR;
|
||
break;
|
||
|
||
case '\n':
|
||
as_warn (_("unterminated string; newline inserted"));
|
||
bump_line_counters ();
|
||
break;
|
||
|
||
#ifndef NO_STRING_ESCAPES
|
||
case '\\':
|
||
switch (c = *input_line_pointer++ & CHAR_MASK)
|
||
{
|
||
case 'b':
|
||
c = '\b';
|
||
break;
|
||
|
||
case 'f':
|
||
c = '\f';
|
||
break;
|
||
|
||
case 'n':
|
||
c = '\n';
|
||
break;
|
||
|
||
case 'r':
|
||
c = '\r';
|
||
break;
|
||
|
||
case 't':
|
||
c = '\t';
|
||
break;
|
||
|
||
case 'v':
|
||
c = '\013';
|
||
break;
|
||
|
||
case '\\':
|
||
case '"':
|
||
break; /* As itself. */
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
{
|
||
long number;
|
||
int i;
|
||
|
||
for (i = 0, number = 0;
|
||
ISDIGIT (c) && i < 3;
|
||
c = *input_line_pointer++, i++)
|
||
{
|
||
number = number * 8 + c - '0';
|
||
}
|
||
|
||
c = number & CHAR_MASK;
|
||
}
|
||
--input_line_pointer;
|
||
break;
|
||
|
||
case 'x':
|
||
case 'X':
|
||
{
|
||
long number;
|
||
|
||
number = 0;
|
||
c = *input_line_pointer++;
|
||
while (ISXDIGIT (c))
|
||
{
|
||
if (ISDIGIT (c))
|
||
number = number * 16 + c - '0';
|
||
else if (ISUPPER (c))
|
||
number = number * 16 + c - 'A' + 10;
|
||
else
|
||
number = number * 16 + c - 'a' + 10;
|
||
c = *input_line_pointer++;
|
||
}
|
||
c = number & CHAR_MASK;
|
||
--input_line_pointer;
|
||
}
|
||
break;
|
||
|
||
case '\n':
|
||
/* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
|
||
as_warn (_("unterminated string; newline inserted"));
|
||
c = '\n';
|
||
bump_line_counters ();
|
||
break;
|
||
|
||
case 0:
|
||
/* Do not advance past the end of the buffer. */
|
||
-- input_line_pointer;
|
||
c = NOT_A_CHAR;
|
||
break;
|
||
|
||
default:
|
||
|
||
#ifdef ONLY_STANDARD_ESCAPES
|
||
as_bad (_("bad escaped character in string"));
|
||
c = '?';
|
||
#endif /* ONLY_STANDARD_ESCAPES */
|
||
|
||
break;
|
||
}
|
||
break;
|
||
#endif /* ! defined (NO_STRING_ESCAPES) */
|
||
|
||
default:
|
||
break;
|
||
}
|
||
return (c);
|
||
}
|
||
|
||
static segT
|
||
get_segmented_expression (expressionS *expP)
|
||
{
|
||
segT retval;
|
||
|
||
retval = expression (expP);
|
||
if (expP->X_op == O_illegal
|
||
|| expP->X_op == O_absent
|
||
|| expP->X_op == O_big)
|
||
{
|
||
as_bad (_("expected address expression"));
|
||
expP->X_op = O_constant;
|
||
expP->X_add_number = 0;
|
||
retval = absolute_section;
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
static segT
|
||
get_known_segmented_expression (expressionS *expP)
|
||
{
|
||
segT retval = get_segmented_expression (expP);
|
||
|
||
if (retval == undefined_section)
|
||
{
|
||
/* There is no easy way to extract the undefined symbol from the
|
||
expression. */
|
||
if (expP->X_add_symbol != NULL
|
||
&& S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
|
||
as_warn (_("symbol \"%s\" undefined; zero assumed"),
|
||
S_GET_NAME (expP->X_add_symbol));
|
||
else
|
||
as_warn (_("some symbol undefined; zero assumed"));
|
||
retval = absolute_section;
|
||
expP->X_op = O_constant;
|
||
expP->X_add_number = 0;
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
char /* Return terminator. */
|
||
get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
|
||
{
|
||
/* FIXME: val_pointer should probably be offsetT *. */
|
||
*val_pointer = (long) get_absolute_expression ();
|
||
return (*input_line_pointer++);
|
||
}
|
||
|
||
/* Like demand_copy_string, but return NULL if the string contains any '\0's.
|
||
Give a warning if that happens. */
|
||
|
||
char *
|
||
demand_copy_C_string (int *len_pointer)
|
||
{
|
||
char *s;
|
||
|
||
if ((s = demand_copy_string (len_pointer)) != 0)
|
||
{
|
||
int len;
|
||
|
||
for (len = *len_pointer; len > 0; len--)
|
||
{
|
||
if (*s == 0)
|
||
{
|
||
s = 0;
|
||
len = 1;
|
||
*len_pointer = 0;
|
||
as_bad (_("this string may not contain \'\\0\'"));
|
||
}
|
||
}
|
||
}
|
||
|
||
return s;
|
||
}
|
||
|
||
/* Demand string, but return a safe (=private) copy of the string.
|
||
Return NULL if we can't read a string here. */
|
||
|
||
char *
|
||
demand_copy_string (int *lenP)
|
||
{
|
||
unsigned int c;
|
||
int len;
|
||
char *retval;
|
||
|
||
len = 0;
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer == '\"')
|
||
{
|
||
input_line_pointer++; /* Skip opening quote. */
|
||
|
||
while (is_a_char (c = next_char_of_string ()))
|
||
{
|
||
obstack_1grow (¬es, c);
|
||
len++;
|
||
}
|
||
/* JF this next line is so demand_copy_C_string will return a
|
||
null terminated string. */
|
||
obstack_1grow (¬es, '\0');
|
||
retval = (char *) obstack_finish (¬es);
|
||
}
|
||
else
|
||
{
|
||
as_bad (_("missing string"));
|
||
retval = NULL;
|
||
ignore_rest_of_line ();
|
||
}
|
||
*lenP = len;
|
||
return (retval);
|
||
}
|
||
|
||
/* In: Input_line_pointer->next character.
|
||
|
||
Do: Skip input_line_pointer over all whitespace.
|
||
|
||
Out: 1 if input_line_pointer->end-of-line. */
|
||
|
||
int
|
||
is_it_end_of_statement (void)
|
||
{
|
||
SKIP_WHITESPACE ();
|
||
return (is_end_of_line[(unsigned char) *input_line_pointer]);
|
||
}
|
||
|
||
void
|
||
equals (char *sym_name, int reassign)
|
||
{
|
||
char *stop = NULL;
|
||
char stopc = 0;
|
||
|
||
input_line_pointer++;
|
||
if (*input_line_pointer == '=')
|
||
input_line_pointer++;
|
||
if (reassign < 0 && *input_line_pointer == '=')
|
||
input_line_pointer++;
|
||
|
||
while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
|
||
input_line_pointer++;
|
||
|
||
if (flag_mri)
|
||
stop = mri_comment_field (&stopc);
|
||
|
||
assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
|
||
|
||
if (flag_mri)
|
||
{
|
||
demand_empty_rest_of_line ();
|
||
mri_comment_end (stop, stopc);
|
||
}
|
||
}
|
||
|
||
/* .incbin -- include a file verbatim at the current location. */
|
||
|
||
void
|
||
s_incbin (int x ATTRIBUTE_UNUSED)
|
||
{
|
||
FILE * binfile;
|
||
char * path;
|
||
char * filename;
|
||
char * binfrag;
|
||
long skip = 0;
|
||
long count = 0;
|
||
long bytes;
|
||
int len;
|
||
|
||
#ifdef md_flush_pending_output
|
||
md_flush_pending_output ();
|
||
#endif
|
||
|
||
#ifdef md_cons_align
|
||
md_cons_align (1);
|
||
#endif
|
||
|
||
SKIP_WHITESPACE ();
|
||
filename = demand_copy_string (& len);
|
||
if (filename == NULL)
|
||
return;
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
/* Look for optional skip and count. */
|
||
if (* input_line_pointer == ',')
|
||
{
|
||
++ input_line_pointer;
|
||
skip = get_absolute_expression ();
|
||
|
||
SKIP_WHITESPACE ();
|
||
|
||
if (* input_line_pointer == ',')
|
||
{
|
||
++ input_line_pointer;
|
||
|
||
count = get_absolute_expression ();
|
||
if (count == 0)
|
||
as_warn (_(".incbin count zero, ignoring `%s'"), filename);
|
||
|
||
SKIP_WHITESPACE ();
|
||
}
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
/* Try opening absolute path first, then try include dirs. */
|
||
binfile = fopen (filename, FOPEN_RB);
|
||
if (binfile == NULL)
|
||
{
|
||
int i;
|
||
|
||
path = XNEWVEC (char, (unsigned long) len + include_dir_maxlen + 5);
|
||
|
||
for (i = 0; i < include_dir_count; i++)
|
||
{
|
||
sprintf (path, "%s/%s", include_dirs[i], filename);
|
||
|
||
binfile = fopen (path, FOPEN_RB);
|
||
if (binfile != NULL)
|
||
break;
|
||
}
|
||
|
||
if (binfile == NULL)
|
||
as_bad (_("file not found: %s"), filename);
|
||
}
|
||
else
|
||
path = xstrdup (filename);
|
||
|
||
if (binfile)
|
||
{
|
||
long file_len;
|
||
|
||
register_dependency (path);
|
||
|
||
/* Compute the length of the file. */
|
||
if (fseek (binfile, 0, SEEK_END) != 0)
|
||
{
|
||
as_bad (_("seek to end of .incbin file failed `%s'"), path);
|
||
goto done;
|
||
}
|
||
file_len = ftell (binfile);
|
||
|
||
/* If a count was not specified use the remainder of the file. */
|
||
if (count == 0)
|
||
count = file_len - skip;
|
||
|
||
if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
|
||
{
|
||
as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
|
||
skip, count, file_len);
|
||
goto done;
|
||
}
|
||
|
||
if (fseek (binfile, skip, SEEK_SET) != 0)
|
||
{
|
||
as_bad (_("could not skip to %ld in file `%s'"), skip, path);
|
||
goto done;
|
||
}
|
||
|
||
/* Allocate frag space and store file contents in it. */
|
||
binfrag = frag_more (count);
|
||
|
||
bytes = fread (binfrag, 1, count, binfile);
|
||
if (bytes < count)
|
||
as_warn (_("truncated file `%s', %ld of %ld bytes read"),
|
||
path, bytes, count);
|
||
}
|
||
done:
|
||
if (binfile != NULL)
|
||
fclose (binfile);
|
||
if (path)
|
||
free (path);
|
||
}
|
||
|
||
/* .include -- include a file at this point. */
|
||
|
||
void
|
||
s_include (int arg ATTRIBUTE_UNUSED)
|
||
{
|
||
char *filename;
|
||
int i;
|
||
FILE *try_file;
|
||
char *path;
|
||
|
||
if (!flag_m68k_mri)
|
||
{
|
||
filename = demand_copy_string (&i);
|
||
if (filename == NULL)
|
||
{
|
||
/* demand_copy_string has already printed an error and
|
||
called ignore_rest_of_line. */
|
||
return;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
SKIP_WHITESPACE ();
|
||
i = 0;
|
||
while (!is_end_of_line[(unsigned char) *input_line_pointer]
|
||
&& *input_line_pointer != ' '
|
||
&& *input_line_pointer != '\t')
|
||
{
|
||
obstack_1grow (¬es, *input_line_pointer);
|
||
++input_line_pointer;
|
||
++i;
|
||
}
|
||
|
||
obstack_1grow (¬es, '\0');
|
||
filename = (char *) obstack_finish (¬es);
|
||
while (!is_end_of_line[(unsigned char) *input_line_pointer])
|
||
++input_line_pointer;
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
path = XNEWVEC (char, (unsigned long) i
|
||
+ include_dir_maxlen + 5 /* slop */ );
|
||
|
||
for (i = 0; i < include_dir_count; i++)
|
||
{
|
||
strcpy (path, include_dirs[i]);
|
||
strcat (path, "/");
|
||
strcat (path, filename);
|
||
if (0 != (try_file = fopen (path, FOPEN_RT)))
|
||
{
|
||
fclose (try_file);
|
||
goto gotit;
|
||
}
|
||
}
|
||
|
||
free (path);
|
||
path = filename;
|
||
gotit:
|
||
/* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
|
||
register_dependency (path);
|
||
input_scrub_insert_file (path);
|
||
}
|
||
|
||
void
|
||
add_include_dir (char *path)
|
||
{
|
||
int i;
|
||
|
||
if (include_dir_count == 0)
|
||
{
|
||
include_dirs = XNEWVEC (const char *, 2);
|
||
include_dirs[0] = "."; /* Current dir. */
|
||
include_dir_count = 2;
|
||
}
|
||
else
|
||
{
|
||
include_dir_count++;
|
||
include_dirs = XRESIZEVEC (const char *, include_dirs,
|
||
include_dir_count);
|
||
}
|
||
|
||
include_dirs[include_dir_count - 1] = path; /* New one. */
|
||
|
||
i = strlen (path);
|
||
if (i > include_dir_maxlen)
|
||
include_dir_maxlen = i;
|
||
}
|
||
|
||
/* Output debugging information to denote the source file. */
|
||
|
||
static void
|
||
generate_file_debug (void)
|
||
{
|
||
if (debug_type == DEBUG_STABS)
|
||
stabs_generate_asm_file ();
|
||
}
|
||
|
||
/* Output line number debugging information for the current source line. */
|
||
|
||
void
|
||
generate_lineno_debug (void)
|
||
{
|
||
switch (debug_type)
|
||
{
|
||
case DEBUG_UNSPECIFIED:
|
||
case DEBUG_NONE:
|
||
case DEBUG_DWARF:
|
||
break;
|
||
case DEBUG_STABS:
|
||
stabs_generate_asm_lineno ();
|
||
break;
|
||
case DEBUG_ECOFF:
|
||
ecoff_generate_asm_lineno ();
|
||
break;
|
||
case DEBUG_DWARF2:
|
||
/* ??? We could here indicate to dwarf2dbg.c that something
|
||
has changed. However, since there is additional backend
|
||
support that is required (calling dwarf2_emit_insn), we
|
||
let dwarf2dbg.c call as_where on its own. */
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Output debugging information to mark a function entry point or end point.
|
||
END_P is zero for .func, and non-zero for .endfunc. */
|
||
|
||
void
|
||
s_func (int end_p)
|
||
{
|
||
do_s_func (end_p, NULL);
|
||
}
|
||
|
||
/* Subroutine of s_func so targets can choose a different default prefix.
|
||
If DEFAULT_PREFIX is NULL, use the target's "leading char". */
|
||
|
||
static void
|
||
do_s_func (int end_p, const char *default_prefix)
|
||
{
|
||
/* Record the current function so that we can issue an error message for
|
||
misplaced .func,.endfunc, and also so that .endfunc needs no
|
||
arguments. */
|
||
static char *current_name;
|
||
static char *current_label;
|
||
|
||
if (end_p)
|
||
{
|
||
if (current_name == NULL)
|
||
{
|
||
as_bad (_("missing .func"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
if (debug_type == DEBUG_STABS)
|
||
stabs_generate_asm_endfunc (current_name, current_label);
|
||
|
||
current_name = current_label = NULL;
|
||
}
|
||
else /* ! end_p */
|
||
{
|
||
char *name, *label;
|
||
char delim1, delim2;
|
||
|
||
if (current_name != NULL)
|
||
{
|
||
as_bad (_(".endfunc missing for previous .func"));
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
delim1 = get_symbol_name (& name);
|
||
name = xstrdup (name);
|
||
*input_line_pointer = delim1;
|
||
SKIP_WHITESPACE_AFTER_NAME ();
|
||
if (*input_line_pointer != ',')
|
||
{
|
||
if (default_prefix)
|
||
{
|
||
if (asprintf (&label, "%s%s", default_prefix, name) == -1)
|
||
as_fatal ("%s", xstrerror (errno));
|
||
}
|
||
else
|
||
{
|
||
char leading_char = bfd_get_symbol_leading_char (stdoutput);
|
||
/* Missing entry point, use function's name with the leading
|
||
char prepended. */
|
||
if (leading_char)
|
||
{
|
||
if (asprintf (&label, "%c%s", leading_char, name) == -1)
|
||
as_fatal ("%s", xstrerror (errno));
|
||
}
|
||
else
|
||
label = name;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
++input_line_pointer;
|
||
SKIP_WHITESPACE ();
|
||
delim2 = get_symbol_name (& label);
|
||
label = xstrdup (label);
|
||
restore_line_pointer (delim2);
|
||
}
|
||
|
||
if (debug_type == DEBUG_STABS)
|
||
stabs_generate_asm_func (name, label);
|
||
|
||
current_name = name;
|
||
current_label = label;
|
||
}
|
||
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
#ifdef HANDLE_BUNDLE
|
||
|
||
void
|
||
s_bundle_align_mode (int arg ATTRIBUTE_UNUSED)
|
||
{
|
||
unsigned int align = get_absolute_expression ();
|
||
SKIP_WHITESPACE ();
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (align > (unsigned int) TC_ALIGN_LIMIT)
|
||
as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
|
||
(unsigned int) TC_ALIGN_LIMIT);
|
||
|
||
if (bundle_lock_frag != NULL)
|
||
{
|
||
as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
|
||
return;
|
||
}
|
||
|
||
bundle_align_p2 = align;
|
||
}
|
||
|
||
void
|
||
s_bundle_lock (int arg ATTRIBUTE_UNUSED)
|
||
{
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (bundle_align_p2 == 0)
|
||
{
|
||
as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
|
||
return;
|
||
}
|
||
|
||
if (bundle_lock_depth == 0)
|
||
{
|
||
bundle_lock_frchain = frchain_now;
|
||
bundle_lock_frag = start_bundle ();
|
||
}
|
||
++bundle_lock_depth;
|
||
}
|
||
|
||
void
|
||
s_bundle_unlock (int arg ATTRIBUTE_UNUSED)
|
||
{
|
||
unsigned int size;
|
||
|
||
demand_empty_rest_of_line ();
|
||
|
||
if (bundle_lock_frag == NULL)
|
||
{
|
||
as_bad (_(".bundle_unlock without preceding .bundle_lock"));
|
||
return;
|
||
}
|
||
|
||
gas_assert (bundle_align_p2 > 0);
|
||
|
||
gas_assert (bundle_lock_depth > 0);
|
||
if (--bundle_lock_depth > 0)
|
||
return;
|
||
|
||
size = pending_bundle_size (bundle_lock_frag);
|
||
|
||
if (size > 1U << bundle_align_p2)
|
||
as_bad (_(".bundle_lock sequence is %u bytes, "
|
||
"but bundle size is only %u bytes"),
|
||
size, 1u << bundle_align_p2);
|
||
else
|
||
finish_bundle (bundle_lock_frag, size);
|
||
|
||
bundle_lock_frag = NULL;
|
||
bundle_lock_frchain = NULL;
|
||
}
|
||
|
||
#endif /* HANDLE_BUNDLE */
|
||
|
||
void
|
||
s_ignore (int arg ATTRIBUTE_UNUSED)
|
||
{
|
||
ignore_rest_of_line ();
|
||
}
|
||
|
||
void
|
||
read_print_statistics (FILE *file)
|
||
{
|
||
hash_print_statistics (file, "pseudo-op table", po_hash);
|
||
}
|
||
|
||
/* Inserts the given line into the input stream.
|
||
|
||
This call avoids macro/conditionals nesting checking, since the contents of
|
||
the line are assumed to replace the contents of a line already scanned.
|
||
|
||
An appropriate use of this function would be substitution of input lines when
|
||
called by md_start_line_hook(). The given line is assumed to already be
|
||
properly scrubbed. */
|
||
|
||
void
|
||
input_scrub_insert_line (const char *line)
|
||
{
|
||
sb newline;
|
||
size_t len = strlen (line);
|
||
sb_build (&newline, len);
|
||
sb_add_buffer (&newline, line, len);
|
||
input_scrub_include_sb (&newline, input_line_pointer, 0);
|
||
sb_kill (&newline);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
|
||
/* Insert a file into the input stream; the path must resolve to an actual
|
||
file; no include path searching or dependency registering is performed. */
|
||
|
||
void
|
||
input_scrub_insert_file (char *path)
|
||
{
|
||
input_scrub_include_file (path, input_line_pointer);
|
||
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
|
||
}
|
||
|
||
/* Find the end of a line, considering quotation and escaping of quotes. */
|
||
|
||
#if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
|
||
# define TC_SINGLE_QUOTE_STRINGS 1
|
||
#endif
|
||
|
||
static char *
|
||
_find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
|
||
int in_macro)
|
||
{
|
||
char inquote = '\0';
|
||
int inescape = 0;
|
||
|
||
while (!is_end_of_line[(unsigned char) *s]
|
||
|| (inquote && !ISCNTRL (*s))
|
||
|| (inquote == '\'' && flag_mri)
|
||
#ifdef TC_EOL_IN_INSN
|
||
|| (insn && TC_EOL_IN_INSN (s))
|
||
#endif
|
||
/* PR 6926: When we are parsing the body of a macro the sequence
|
||
\@ is special - it refers to the invocation count. If the @
|
||
character happens to be registered as a line-separator character
|
||
by the target, then the is_end_of_line[] test above will have
|
||
returned true, but we need to ignore the line separating
|
||
semantics in this particular case. */
|
||
|| (in_macro && inescape && *s == '@')
|
||
)
|
||
{
|
||
if (mri_string && *s == '\'')
|
||
inquote ^= *s;
|
||
else if (inescape)
|
||
inescape = 0;
|
||
else if (*s == '\\')
|
||
inescape = 1;
|
||
else if (!inquote
|
||
? *s == '"'
|
||
#ifdef TC_SINGLE_QUOTE_STRINGS
|
||
|| (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
|
||
#endif
|
||
: *s == inquote)
|
||
inquote ^= *s;
|
||
++s;
|
||
}
|
||
if (inquote)
|
||
as_warn (_("missing closing `%c'"), inquote);
|
||
if (inescape && !ignore_input ())
|
||
as_warn (_("stray `\\'"));
|
||
return s;
|
||
}
|
||
|
||
char *
|
||
find_end_of_line (char *s, int mri_string)
|
||
{
|
||
return _find_end_of_line (s, mri_string, 0, 0);
|
||
}
|
||
|
||
static char *saved_ilp = NULL;
|
||
static char *saved_limit;
|
||
|
||
/* Use BUF as a temporary input pointer for calling other functions in this
|
||
file. BUF must be a C string, so that its end can be found by strlen.
|
||
Also sets the buffer_limit variable (local to this file) so that buffer
|
||
overruns should not occur. Saves the current input line pointer so that
|
||
it can be restored by calling restore_ilp().
|
||
|
||
Does not support recursion.
|
||
|
||
FIXME: This function is currently only used by stabs.c but that
|
||
should be extended to other files in the gas source directory. */
|
||
|
||
void
|
||
temp_ilp (char *buf)
|
||
{
|
||
gas_assert (saved_ilp == NULL);
|
||
gas_assert (buf != NULL);
|
||
|
||
saved_ilp = input_line_pointer;
|
||
saved_limit = buffer_limit;
|
||
/* Prevent the assert in restore_ilp from triggering if
|
||
the input_line_pointer has not yet been initialised. */
|
||
if (saved_ilp == NULL)
|
||
saved_limit = saved_ilp = (char *) "";
|
||
|
||
input_line_pointer = buf;
|
||
buffer_limit = buf + strlen (buf);
|
||
input_from_string = TRUE;
|
||
}
|
||
|
||
/* Restore a saved input line pointer. */
|
||
|
||
void
|
||
restore_ilp (void)
|
||
{
|
||
gas_assert (saved_ilp != NULL);
|
||
|
||
input_line_pointer = saved_ilp;
|
||
buffer_limit = saved_limit;
|
||
input_from_string = FALSE;
|
||
|
||
saved_ilp = NULL;
|
||
}
|