1999-06-03 10:51:53 +08:00
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/* dwarf2dbg.c - DWARF2 debug support
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2000-02-22 15:21:23 +08:00
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Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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1999-06-03 10:51:53 +08:00
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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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 2, 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, 59 Temple Place - Suite 330, Boston, MA
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1999-06-12 16:48:00 +08:00
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02111-1307, USA. */
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1999-06-03 10:51:53 +08:00
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1999-06-12 16:48:00 +08:00
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/* Logical line numbers can be controlled by the compiler via the
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1999-06-03 10:51:53 +08:00
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following two directives:
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.file FILENO "file.c"
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.loc FILENO LINENO [COLUMN]
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FILENO is the filenumber. */
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#include "ansidecl.h"
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#include "as.h"
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#include "dwarf2dbg.h"
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#include "subsegs.h"
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1999-06-12 16:53:18 +08:00
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#include "elf/dwarf2.h"
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1999-06-03 10:51:53 +08:00
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/* Since we can't generate the prolog until the body is complete, we
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use three different subsegments for .debug_line: one holding the
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prolog, one for the directory and filename info, and one for the
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body ("statement program"). */
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#define DL_PROLOG 0
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#define DL_FILES 1
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#define DL_BODY 2
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/* First special line opcde - leave room for the standard opcodes.
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Note: If you want to change this, you'll have to update the
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"standard_opcode_lengths" table that is emitted below in
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dwarf2_finish(). */
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#define DWARF2_LINE_OPCODE_BASE 10
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#ifndef DWARF2_LINE_BASE
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/* Minimum line offset in a special line info. opcode. This value
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was chosen to give a reasonable range of values. */
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# define DWARF2_LINE_BASE -5
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#endif
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/* Range of line offsets in a special line info. opcode. */
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#ifndef DWARF2_LINE_RANGE
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# define DWARF2_LINE_RANGE 14
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#endif
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#ifndef DWARF2_LINE_MIN_INSN_LENGTH
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/* Define the architecture-dependent minimum instruction length (in
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bytes). This value should be rather too small than too big. */
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# define DWARF2_LINE_MIN_INSN_LENGTH 4
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#endif
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/* Flag that indicates the initial value of the is_stmt_start flag.
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In the present implementation, we do not mark any lines as
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the beginning of a source statement, because that information
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is not made available by the GCC front-end. */
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#define DWARF2_LINE_DEFAULT_IS_STMT 1
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/* Flag that indicates the initial value of the is_stmt_start flag.
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In the present implementation, we do not mark any lines as
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the beginning of a source statement, because that information
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is not made available by the GCC front-end. */
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#define DWARF2_LINE_DEFAULT_IS_STMT 1
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1999-08-27 17:03:18 +08:00
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/* Given a special op, return the line skip amount. */
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1999-06-03 10:51:53 +08:00
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#define SPECIAL_LINE(op) \
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(((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE)
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/* Given a special op, return the address skip amount (in units of
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DWARF2_LINE_MIN_INSN_LENGTH. */
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#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE)
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1999-08-27 17:03:18 +08:00
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/* The maximum address skip amount that can be encoded with a special op. */
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1999-06-03 10:51:53 +08:00
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#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255)
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#define INITIAL_STATE \
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1999-08-27 17:03:18 +08:00
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/* Initialize as per DWARF2.0 standard. */ \
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1999-06-03 10:51:53 +08:00
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0, /* address */ \
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1, /* file */ \
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1, /* line */ \
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0, /* column */ \
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DWARF2_LINE_DEFAULT_IS_STMT, /* is_stmt */ \
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0, /* basic_block */ \
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1 /* empty_sequence */
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static struct
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{
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/* state machine state as per DWARF2 manual: */
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struct dwarf2_sm
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{
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1999-06-12 05:06:44 +08:00
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addressT addr;
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1999-06-03 10:51:53 +08:00
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unsigned int filenum;
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unsigned int line;
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unsigned int column;
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unsigned int
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is_stmt : 1,
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basic_block : 1,
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empty_sequence : 1; /* current code sequence has no DWARF2 directives? */
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}
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sm;
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unsigned int
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any_dwarf2_directives : 1; /* did we emit any DWARF2 line debug directives? */
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1999-08-27 17:03:18 +08:00
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fragS * frag; /* frag that "addr" is relative to */
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1999-06-03 10:51:53 +08:00
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segT text_seg; /* text segment "addr" is relative to */
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subsegT text_subseg;
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segT line_seg; /* ".debug_line" segment */
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int last_filename; /* index of last filename that was used */
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int num_filenames; /* index of last filename in use */
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int filename_len; /* length of the filename array */
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struct
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{
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int dir; /* valid after gen_dir_list() only */
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char *name; /* full path before gen_dir_list(), filename afterwards */
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}
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*file;
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struct dwarf2_line_info current; /* current source info: */
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/* counters for statistical purposes: */
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unsigned int num_line_entries;
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unsigned int opcode_hist[256]; /* histogram of opcode frequencies */
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}
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ls =
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{
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{
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INITIAL_STATE
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},
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1999-07-12 04:20:04 +08:00
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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1999-08-27 17:03:18 +08:00
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0,
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1999-07-12 04:20:04 +08:00
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NULL,
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{ NULL, 0, 0, 0, 0 },
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0,
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{
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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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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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1999-06-03 10:51:53 +08:00
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};
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1999-06-06 02:19:09 +08:00
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/* Function prototypes: */
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1999-06-12 05:06:44 +08:00
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static void out_uleb128 PARAMS ((addressT));
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static void out_sleb128 PARAMS ((offsetT));
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static void gen_addr_line PARAMS ((int, addressT));
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1999-06-06 02:19:09 +08:00
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static void reset_state_machine PARAMS ((void));
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1999-06-12 05:06:44 +08:00
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static void out_set_addr PARAMS ((addressT));
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1999-06-06 02:19:09 +08:00
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static void out_end_sequence PARAMS ((void));
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static int get_filenum PARAMS ((int, char *));
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static void gen_dir_list PARAMS ((void));
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static void gen_file_list PARAMS ((void));
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static void print_stats PARAMS ((unsigned long));
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1999-06-03 10:51:53 +08:00
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#define out_byte(byte) FRAG_APPEND_1_CHAR(byte)
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#define out_opcode(opc) (out_byte ((opc)), ++ls.opcode_hist[(opc) & 0xff])
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/* Output an unsigned "little-endian base 128" number. */
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static void
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1999-06-06 02:19:09 +08:00
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out_uleb128 (value)
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1999-06-12 05:06:44 +08:00
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addressT value;
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1999-06-03 10:51:53 +08:00
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{
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unsigned char byte, more = 0x80;
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do
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{
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byte = value & 0x7f;
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value >>= 7;
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if (value == 0)
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more = 0;
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out_byte (more | byte);
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}
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while (more);
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}
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/* Output a signed "little-endian base 128" number. */
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static void
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1999-06-06 02:19:09 +08:00
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out_sleb128 (value)
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1999-06-12 05:06:44 +08:00
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offsetT value;
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1999-06-03 10:51:53 +08:00
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{
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unsigned char byte, more = 0x80;
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do
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{
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byte = value & 0x7f;
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value >>= 7;
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if (((value == 0) && ((byte & 0x40) == 0))
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|| ((value == -1) && ((byte & 0x40) != 0)))
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more = 0;
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out_byte (more | byte);
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}
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while (more);
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}
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/* Encode a pair of line and address skips as efficiently as possible.
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Note that the line skip is signed, whereas the address skip is
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unsigned. */
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static void
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1999-06-06 02:19:09 +08:00
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gen_addr_line (line_delta, addr_delta)
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int line_delta;
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1999-06-12 05:06:44 +08:00
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addressT addr_delta;
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1999-06-03 10:51:53 +08:00
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{
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unsigned int tmp, opcode;
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tmp = line_delta - DWARF2_LINE_BASE;
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if (tmp >= DWARF2_LINE_RANGE)
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{
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out_opcode (DW_LNS_advance_line);
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out_sleb128 (line_delta);
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tmp = 0 - DWARF2_LINE_BASE;
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line_delta = 0;
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}
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tmp += DWARF2_LINE_OPCODE_BASE;
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/* try using a special opcode: */
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opcode = tmp + addr_delta*DWARF2_LINE_RANGE;
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if (opcode <= 255)
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{
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out_opcode (opcode);
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return;
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}
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/* try using DW_LNS_const_add_pc followed by special op: */
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opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA)*DWARF2_LINE_RANGE;
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if (opcode <= 255)
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{
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out_opcode (DW_LNS_const_add_pc);
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out_opcode (opcode);
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return;
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}
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out_opcode (DW_LNS_advance_pc);
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out_uleb128 (addr_delta);
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if (line_delta)
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out_opcode (tmp); /* output line-delta */
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else
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out_opcode (DW_LNS_copy); /* append new row with current info */
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}
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static void
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1999-06-06 02:19:09 +08:00
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reset_state_machine ()
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1999-06-03 10:51:53 +08:00
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{
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static const struct dwarf2_sm initial_state = { INITIAL_STATE };
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ls.sm = initial_state;
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}
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/* Set an absolute address (may results in a relocation entry): */
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static void
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1999-06-06 02:19:09 +08:00
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out_set_addr (addr)
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1999-06-12 05:06:44 +08:00
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addressT addr;
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1999-06-03 10:51:53 +08:00
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{
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subsegT saved_subseg;
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segT saved_seg;
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expressionS expr;
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symbolS *sym;
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1999-06-12 05:06:44 +08:00
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int bytes_per_address;
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1999-06-03 10:51:53 +08:00
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saved_seg = now_seg;
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saved_subseg = now_subseg;
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subseg_set (ls.text_seg, ls.text_subseg);
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sym = symbol_new (".L0\001", now_seg, addr, frag_now);
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subseg_set (saved_seg, saved_subseg);
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1999-06-12 05:06:44 +08:00
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#ifdef BFD_ASSEMBLER
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bytes_per_address = bfd_arch_bits_per_address (stdoutput) / 8;
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#else
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/* FIXME. */
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bytes_per_address = 4;
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#endif
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1999-06-03 10:51:53 +08:00
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out_opcode (DW_LNS_extended_op);
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1999-06-12 05:06:44 +08:00
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out_uleb128 (bytes_per_address + 1);
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1999-06-03 10:51:53 +08:00
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out_opcode (DW_LNE_set_address);
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expr.X_op = O_symbol;
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expr.X_add_symbol = sym;
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expr.X_add_number = 0;
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1999-06-12 05:06:44 +08:00
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emit_expr (&expr, bytes_per_address);
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1999-06-03 10:51:53 +08:00
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}
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/* Emit DW_LNS_end_sequence and reset state machine. Does not
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preserve the current segment/sub-segment! */
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static void
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1999-06-06 02:19:09 +08:00
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out_end_sequence ()
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1999-06-03 10:51:53 +08:00
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{
|
1999-06-12 05:06:44 +08:00
|
|
|
addressT addr, delta;
|
1999-08-27 17:03:18 +08:00
|
|
|
fragS *text_frag;
|
1999-06-03 10:51:53 +08:00
|
|
|
|
|
|
|
if (ls.text_seg)
|
|
|
|
{
|
|
|
|
subseg_set (ls.text_seg, ls.text_subseg);
|
|
|
|
#ifdef md_current_text_addr
|
|
|
|
addr = md_current_text_addr ();
|
|
|
|
#else
|
|
|
|
addr = frag_now_fix ();
|
|
|
|
#endif
|
1999-08-27 17:03:18 +08:00
|
|
|
text_frag = frag_now;
|
1999-06-03 10:51:53 +08:00
|
|
|
subseg_set (ls.line_seg, DL_BODY);
|
1999-08-27 17:03:18 +08:00
|
|
|
if (text_frag != ls.frag)
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
out_set_addr (addr);
|
|
|
|
ls.sm.addr = addr;
|
1999-08-27 17:03:18 +08:00
|
|
|
ls.frag = text_frag;
|
1999-06-03 10:51:53 +08:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
1999-08-26 20:13:01 +08:00
|
|
|
delta = (addr - ls.sm.addr) / DWARF2_LINE_MIN_INSN_LENGTH;
|
1999-06-03 10:51:53 +08:00
|
|
|
if (delta > 0)
|
1999-08-26 20:13:01 +08:00
|
|
|
{
|
|
|
|
/* Advance address without updating the line-debug
|
|
|
|
matrix---the end_sequence entry is used only to tell
|
|
|
|
the debugger the end of the sequence.*/
|
|
|
|
out_opcode (DW_LNS_advance_pc);
|
|
|
|
out_uleb128 (delta);
|
|
|
|
}
|
1999-06-03 10:51:53 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
subseg_set (ls.line_seg, DL_BODY);
|
|
|
|
|
|
|
|
out_opcode (DW_LNS_extended_op);
|
|
|
|
out_uleb128 (1);
|
|
|
|
out_byte (DW_LNE_end_sequence);
|
|
|
|
|
|
|
|
reset_state_machine ();
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Look up a filenumber either by filename or by filenumber. If both
|
|
|
|
a filenumber and a filename are specified, lookup by filename takes
|
|
|
|
precedence. If the filename cannot be found, it is added to the
|
1999-08-26 19:11:43 +08:00
|
|
|
filetable and the filenumber for the new entry is returned. */
|
1999-06-03 10:51:53 +08:00
|
|
|
static int
|
1999-06-06 02:19:09 +08:00
|
|
|
get_filenum (filenum, file)
|
|
|
|
int filenum;
|
|
|
|
char *file;
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
int i, last = filenum - 1;
|
|
|
|
char char0 = file[0];
|
|
|
|
|
1999-08-26 19:11:43 +08:00
|
|
|
/* If filenum is out of range of the filename table, then try using the
|
|
|
|
table entry returned from the previous call. */
|
|
|
|
if (last >= ls.num_filenames || last < 0)
|
1999-06-03 10:51:53 +08:00
|
|
|
last = ls.last_filename;
|
|
|
|
|
1999-08-26 19:11:43 +08:00
|
|
|
/* Do a quick check against the specified or previously used filenum. */
|
1999-06-03 10:51:53 +08:00
|
|
|
if (ls.num_filenames > 0 && ls.file[last].name[0] == char0
|
|
|
|
&& strcmp (ls.file[last].name + 1, file + 1) == 0)
|
|
|
|
return last + 1;
|
|
|
|
|
|
|
|
/* no match, fall back to simple linear scan: */
|
|
|
|
for (i = 0; i < ls.num_filenames; ++i)
|
|
|
|
{
|
|
|
|
if (ls.file[i].name[0] == char0
|
|
|
|
&& strcmp (ls.file[i].name + 1, file + 1) == 0)
|
|
|
|
{
|
|
|
|
ls.last_filename = i;
|
|
|
|
return i + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* no match: enter new filename */
|
|
|
|
if (ls.num_filenames >= ls.filename_len)
|
|
|
|
{
|
|
|
|
ls.filename_len += 13;
|
|
|
|
ls.file = xrealloc (ls.file, ls.filename_len * sizeof (ls.file[0]));
|
|
|
|
}
|
|
|
|
ls.file[ls.num_filenames].dir = 0;
|
|
|
|
ls.file[ls.num_filenames].name = file;
|
1999-08-26 19:11:43 +08:00
|
|
|
ls.last_filename = ls.num_filenames;
|
1999-06-03 10:51:53 +08:00
|
|
|
return ++ls.num_filenames;
|
|
|
|
}
|
|
|
|
|
1999-08-27 17:03:18 +08:00
|
|
|
/* Emit an entry in the line number table if the address or line has changed.
|
|
|
|
ADDR is relative to the current frag in the text section. */
|
|
|
|
|
1999-06-03 10:51:53 +08:00
|
|
|
void
|
1999-06-06 02:19:09 +08:00
|
|
|
dwarf2_gen_line_info (addr, l)
|
1999-06-12 05:06:44 +08:00
|
|
|
addressT addr;
|
1999-06-06 02:19:09 +08:00
|
|
|
struct dwarf2_line_info *l;
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
unsigned int filenum = l->filenum;
|
|
|
|
unsigned int any_output = 0;
|
|
|
|
subsegT saved_subseg;
|
|
|
|
segT saved_seg;
|
1999-08-27 17:03:18 +08:00
|
|
|
fragS *saved_frag;
|
1999-06-03 10:51:53 +08:00
|
|
|
|
|
|
|
if (flag_debug)
|
1999-07-15 19:27:08 +08:00
|
|
|
fprintf (stderr, "line: addr %lx file `%s' line %u col %u flags %x\n",
|
|
|
|
(unsigned long) addr, l->filename, l->line, l->column, l->flags);
|
1999-06-03 10:51:53 +08:00
|
|
|
|
|
|
|
if (filenum > 0 && !l->filename)
|
|
|
|
{
|
1999-07-12 04:20:04 +08:00
|
|
|
if (filenum >= (unsigned int) ls.num_filenames)
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
as_warn ("Encountered bad file number in line number debug info!");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else if (l->filename)
|
|
|
|
filenum = get_filenum (filenum, l->filename);
|
|
|
|
else
|
|
|
|
return; /* no filename, no filnum => no play */
|
|
|
|
|
1999-08-26 19:11:43 +08:00
|
|
|
/* Must save these before the subseg_new call, as that call will change
|
|
|
|
them. */
|
|
|
|
saved_seg = now_seg;
|
|
|
|
saved_subseg = now_subseg;
|
1999-08-27 17:03:18 +08:00
|
|
|
saved_frag = frag_now;
|
1999-08-26 19:11:43 +08:00
|
|
|
|
1999-06-03 10:51:53 +08:00
|
|
|
if (!ls.line_seg)
|
|
|
|
{
|
1999-06-12 05:06:44 +08:00
|
|
|
#ifdef BFD_ASSEMBLER
|
1999-06-06 07:15:34 +08:00
|
|
|
symbolS *secsym;
|
1999-06-12 05:06:44 +08:00
|
|
|
#endif
|
1999-06-06 07:15:34 +08:00
|
|
|
|
1999-06-03 11:20:21 +08:00
|
|
|
ls.line_seg = subseg_new (".debug_line", 0);
|
1999-06-12 05:06:44 +08:00
|
|
|
|
|
|
|
#ifdef BFD_ASSEMBLER
|
1999-06-03 10:51:53 +08:00
|
|
|
bfd_set_section_flags (stdoutput, ls.line_seg, SEC_READONLY);
|
1999-06-03 11:20:21 +08:00
|
|
|
|
|
|
|
/* We're going to need this symbol. */
|
1999-06-06 07:15:34 +08:00
|
|
|
secsym = symbol_find (".debug_line");
|
|
|
|
if (secsym != NULL)
|
|
|
|
symbol_set_bfdsym (secsym, ls.line_seg->symbol);
|
|
|
|
else
|
|
|
|
symbol_table_insert (section_symbol (ls.line_seg));
|
1999-06-12 05:06:44 +08:00
|
|
|
#endif
|
1999-06-03 10:51:53 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
subseg_set (ls.line_seg, DL_BODY);
|
|
|
|
|
|
|
|
if (ls.text_seg != saved_seg || ls.text_subseg != saved_subseg)
|
|
|
|
{
|
|
|
|
if (!ls.sm.empty_sequence)
|
|
|
|
{
|
|
|
|
out_end_sequence (); /* terminate previous sequence */
|
|
|
|
ls.sm.empty_sequence = 1;
|
|
|
|
}
|
|
|
|
any_output = 1;
|
|
|
|
ls.text_seg = saved_seg;
|
|
|
|
ls.text_subseg = saved_subseg;
|
|
|
|
out_set_addr (addr);
|
|
|
|
ls.sm.addr = addr;
|
1999-08-27 17:03:18 +08:00
|
|
|
ls.frag = saved_frag;
|
1999-06-03 10:51:53 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
if (ls.sm.filenum != filenum)
|
|
|
|
{
|
|
|
|
any_output = 1;
|
|
|
|
out_opcode (DW_LNS_set_file);
|
|
|
|
out_uleb128 (filenum);
|
|
|
|
ls.sm.filenum = filenum;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ls.sm.column != l->column)
|
|
|
|
{
|
|
|
|
any_output = 1;
|
|
|
|
out_opcode (DW_LNS_set_column);
|
|
|
|
out_uleb128 (l->column);
|
|
|
|
ls.sm.column = l->column;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (((l->flags & DWARF2_FLAG_BEGIN_STMT) != 0) != ls.sm.is_stmt)
|
|
|
|
{
|
|
|
|
any_output = 1;
|
|
|
|
out_opcode (DW_LNS_negate_stmt);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (l->flags & DWARF2_FLAG_BEGIN_BLOCK)
|
|
|
|
{
|
|
|
|
any_output = 1;
|
|
|
|
out_opcode (DW_LNS_set_basic_block);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ls.sm.line != l->line)
|
|
|
|
{
|
|
|
|
any_output = 1;
|
1999-08-27 17:03:18 +08:00
|
|
|
if (saved_frag != ls.frag)
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
1999-08-27 17:03:18 +08:00
|
|
|
/* If a new frag got allocated (for whatever reason), then
|
|
|
|
deal with it by generating a reference symbol. Note: no
|
|
|
|
end_sequence needs to be generated because the address did
|
|
|
|
not really decrease (only the reference point changed). */
|
1999-06-03 10:51:53 +08:00
|
|
|
out_set_addr (addr);
|
|
|
|
ls.sm.addr = addr;
|
1999-08-27 17:03:18 +08:00
|
|
|
ls.frag = saved_frag;
|
1999-06-03 10:51:53 +08:00
|
|
|
}
|
|
|
|
gen_addr_line (l->line - ls.sm.line,
|
|
|
|
(addr - ls.sm.addr) / DWARF2_LINE_MIN_INSN_LENGTH);
|
|
|
|
ls.sm.basic_block = 0;
|
|
|
|
ls.sm.line = l->line;
|
|
|
|
ls.sm.addr = addr;
|
|
|
|
}
|
|
|
|
|
|
|
|
subseg_set (saved_seg, saved_subseg);
|
|
|
|
|
|
|
|
ls.num_line_entries += any_output;
|
|
|
|
if (any_output)
|
|
|
|
ls.sm.empty_sequence = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
1999-06-06 02:19:09 +08:00
|
|
|
gen_dir_list ()
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
char *str, *slash, *dir_list, *dp, *cp;
|
|
|
|
int i, j, num_dirs;
|
|
|
|
|
|
|
|
dir_list = frag_more (0);
|
|
|
|
num_dirs = 0;
|
|
|
|
|
|
|
|
for (i = 0; i < ls.num_filenames; ++i)
|
|
|
|
{
|
|
|
|
str = ls.file[i].name;
|
|
|
|
slash = strrchr (str, '/');
|
|
|
|
if (slash)
|
|
|
|
{
|
|
|
|
*slash = '\0';
|
|
|
|
for (j = 0, dp = dir_list; j < num_dirs; ++j)
|
|
|
|
{
|
|
|
|
if (strcmp (str, dp) == 0)
|
|
|
|
{
|
1999-06-27 00:10:10 +08:00
|
|
|
ls.file[i].dir = j + 1;
|
1999-06-03 10:51:53 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
dp += strlen (dp);
|
|
|
|
}
|
|
|
|
if (j >= num_dirs)
|
|
|
|
{
|
|
|
|
/* didn't find this directory: append it to the list */
|
|
|
|
size_t size = strlen (str) + 1;
|
|
|
|
cp = frag_more (size);
|
|
|
|
memcpy (cp, str, size);
|
|
|
|
ls.file[i].dir = ++num_dirs;
|
|
|
|
}
|
|
|
|
*slash = '/';
|
|
|
|
ls.file[i].name = slash + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
out_byte ('\0'); /* terminate directory list */
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
1999-06-06 02:19:09 +08:00
|
|
|
gen_file_list ()
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
size_t size;
|
|
|
|
char *cp;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < ls.num_filenames; ++i)
|
|
|
|
{
|
|
|
|
size = strlen (ls.file[i].name) + 1;
|
|
|
|
cp = frag_more (size);
|
|
|
|
memcpy (cp, ls.file[i].name, size);
|
|
|
|
|
|
|
|
out_uleb128 (ls.file[i].dir); /* directory number */
|
|
|
|
out_uleb128 (0); /* last modification timestamp */
|
|
|
|
out_uleb128 (0); /* filesize */
|
|
|
|
}
|
|
|
|
out_byte (0); /* terminate filename list */
|
|
|
|
}
|
|
|
|
|
1999-06-06 02:19:09 +08:00
|
|
|
static void
|
|
|
|
print_stats (total_size)
|
|
|
|
unsigned long total_size;
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
static const char *opc_name[] =
|
|
|
|
{
|
|
|
|
"extended", "copy", "advance_pc", "advance_line", "set_file",
|
|
|
|
"set_column", "negate_stmt", "set_basic_block", "const_add_pc",
|
|
|
|
"fixed_advance_pc"
|
|
|
|
};
|
1999-07-12 04:20:04 +08:00
|
|
|
size_t i;
|
|
|
|
int j;
|
1999-06-03 10:51:53 +08:00
|
|
|
|
|
|
|
fprintf (stderr, "Average size: %g bytes/line\n",
|
|
|
|
total_size / (double) ls.num_line_entries);
|
|
|
|
|
|
|
|
fprintf (stderr, "\nStandard opcode histogram:\n");
|
|
|
|
|
|
|
|
for (i = 0; i < sizeof (opc_name)/sizeof (opc_name[0]); ++i)
|
|
|
|
{
|
|
|
|
fprintf (stderr, "%s", opc_name[i]);
|
|
|
|
for (j = strlen (opc_name[i]); j < 16; ++j)
|
|
|
|
fprintf (stderr, " ");
|
|
|
|
fprintf (stderr, ": %u\n", ls.opcode_hist[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
fprintf (stderr, "\nSpecial opcodes:\naddr\t\t\t\tline skip\n");
|
|
|
|
|
|
|
|
fprintf (stderr, "skip: ");
|
|
|
|
for (j = DWARF2_LINE_BASE; j < DWARF2_LINE_BASE + DWARF2_LINE_RANGE; ++j)
|
|
|
|
fprintf (stderr, "%3d", j);
|
|
|
|
fprintf (stderr, "\n-----");
|
|
|
|
|
|
|
|
for (; i < 256; ++i)
|
|
|
|
{
|
|
|
|
j = SPECIAL_LINE (i);
|
|
|
|
if (j == DWARF2_LINE_BASE)
|
|
|
|
fprintf (stderr, "\n%4u: ",
|
2000-02-22 15:21:23 +08:00
|
|
|
((unsigned int)
|
|
|
|
DWARF2_LINE_MIN_INSN_LENGTH * SPECIAL_ADDR (i)));
|
1999-06-03 10:51:53 +08:00
|
|
|
fprintf (stderr, " %2u", ls.opcode_hist[i]);
|
|
|
|
}
|
|
|
|
fprintf (stderr, "\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
1999-06-06 02:19:09 +08:00
|
|
|
dwarf2_finish ()
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
1999-06-12 05:06:44 +08:00
|
|
|
addressT body_size, total_size, prolog_size;
|
1999-06-06 02:19:09 +08:00
|
|
|
subsegT saved_subseg;
|
1999-06-03 10:51:53 +08:00
|
|
|
segT saved_seg;
|
|
|
|
char *cp;
|
|
|
|
|
|
|
|
if (!ls.line_seg)
|
|
|
|
/* no .debug_line segment, no work to do... */
|
|
|
|
return;
|
|
|
|
|
|
|
|
saved_seg = now_seg;
|
|
|
|
saved_subseg = now_subseg;
|
|
|
|
|
|
|
|
if (!ls.sm.empty_sequence)
|
|
|
|
out_end_sequence ();
|
|
|
|
total_size = body_size = frag_now_fix ();
|
|
|
|
|
|
|
|
/* now generate the directory and file lists: */
|
|
|
|
subseg_set (ls.line_seg, DL_FILES);
|
|
|
|
gen_dir_list ();
|
|
|
|
gen_file_list ();
|
|
|
|
total_size += frag_now_fix ();
|
|
|
|
|
|
|
|
/* and now the header ("statement program prolog", in DWARF2 lingo...) */
|
|
|
|
subseg_set (ls.line_seg, DL_PROLOG);
|
|
|
|
|
|
|
|
cp = frag_more (15 + DWARF2_LINE_OPCODE_BASE - 1);
|
|
|
|
|
|
|
|
total_size += frag_now_fix ();
|
|
|
|
prolog_size = total_size - body_size - 10;
|
|
|
|
|
|
|
|
# define STUFF(val,size) md_number_to_chars (cp, val, size); cp += size;
|
|
|
|
STUFF (total_size - 4, 4); /* length */
|
|
|
|
STUFF (2, 2); /* version */
|
|
|
|
STUFF (prolog_size, 4); /* prologue_length */
|
|
|
|
STUFF (DWARF2_LINE_MIN_INSN_LENGTH, 1);
|
|
|
|
STUFF (DWARF2_LINE_DEFAULT_IS_STMT, 1);
|
|
|
|
STUFF (DWARF2_LINE_BASE, 1);
|
|
|
|
STUFF (DWARF2_LINE_RANGE, 1);
|
|
|
|
STUFF (DWARF2_LINE_OPCODE_BASE, 1);
|
|
|
|
|
|
|
|
/* standard_opcode_lengths: */
|
|
|
|
STUFF (0, 1); /* DW_LNS_copy */
|
|
|
|
STUFF (1, 1); /* DW_LNS_advance_pc */
|
|
|
|
STUFF (1, 1); /* DW_LNS_advance_line */
|
|
|
|
STUFF (1, 1); /* DW_LNS_set_file */
|
|
|
|
STUFF (1, 1); /* DW_LNS_set_column */
|
|
|
|
STUFF (0, 1); /* DW_LNS_negate_stmt */
|
|
|
|
STUFF (0, 1); /* DW_LNS_set_basic_block */
|
|
|
|
STUFF (0, 1); /* DW_LNS_const_add_pc */
|
|
|
|
STUFF (1, 1); /* DW_LNS_fixed_advance_pc */
|
|
|
|
|
|
|
|
subseg_set (saved_seg, saved_subseg);
|
|
|
|
|
|
|
|
if (flag_debug)
|
|
|
|
print_stats (total_size);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
1999-06-06 02:19:09 +08:00
|
|
|
dwarf2_directive_file (dummy)
|
1999-07-12 04:20:04 +08:00
|
|
|
int dummy ATTRIBUTE_UNUSED;
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
int len;
|
|
|
|
|
1999-06-06 02:19:09 +08:00
|
|
|
/* Continue to accept a bare string and pass it off. */
|
|
|
|
SKIP_WHITESPACE ();
|
|
|
|
if (*input_line_pointer == '"')
|
|
|
|
{
|
|
|
|
s_app_file (0);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
1999-06-03 10:51:53 +08:00
|
|
|
ls.any_dwarf2_directives = 1;
|
|
|
|
|
|
|
|
if (debug_type == DEBUG_NONE)
|
|
|
|
/* Automatically turn on DWARF2 debug info unless something else
|
|
|
|
has been selected. */
|
|
|
|
debug_type = DEBUG_DWARF2;
|
|
|
|
|
|
|
|
ls.current.filenum = get_absolute_expression ();
|
|
|
|
ls.current.filename = demand_copy_C_string (&len);
|
|
|
|
|
|
|
|
demand_empty_rest_of_line ();
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
1999-06-06 02:19:09 +08:00
|
|
|
dwarf2_directive_loc (dummy)
|
1999-07-12 04:20:04 +08:00
|
|
|
int dummy ATTRIBUTE_UNUSED;
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
ls.any_dwarf2_directives = 1;
|
|
|
|
|
|
|
|
ls.current.filenum = get_absolute_expression ();
|
|
|
|
SKIP_WHITESPACE ();
|
|
|
|
ls.current.line = get_absolute_expression ();
|
|
|
|
SKIP_WHITESPACE ();
|
|
|
|
ls.current.column = get_absolute_expression ();
|
|
|
|
demand_empty_rest_of_line ();
|
|
|
|
|
|
|
|
ls.current.flags = DWARF2_FLAG_BEGIN_STMT;
|
|
|
|
|
|
|
|
#ifndef NO_LISTING
|
|
|
|
if (listing)
|
|
|
|
listing_source_line (ls.current.line);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
1999-06-06 02:19:09 +08:00
|
|
|
dwarf2_where (line)
|
|
|
|
struct dwarf2_line_info *line;
|
1999-06-03 10:51:53 +08:00
|
|
|
{
|
|
|
|
if (ls.any_dwarf2_directives)
|
|
|
|
*line = ls.current;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
as_where (&line->filename, &line->line);
|
|
|
|
line->filenum = 0;
|
|
|
|
line->column = 0;
|
|
|
|
line->flags = DWARF2_FLAG_BEGIN_STMT;
|
|
|
|
}
|
|
|
|
}
|