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binutils-gdb/gas/config/tc-or32.c
Alan Modra a161fe5320 gas reloc rewrite.
2002-09-05 00:01:18 +00:00

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/* Assembly backend for the OpenRISC 1000.
Copyright (C) 2002 Free Software Foundation, Inc.
Contributed by Damjan Lampret <lampret@opencores.org>.
Modified bu Johan Rydberg, <johan.rydberg@netinsight.se>.
Based upon a29k port.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* tc-a29k.c used as a template. */
#include "safe-ctype.h"
#include "as.h"
#include "opcode/or32.h"
#ifdef BFD_ASSEMBLER
#include "elf/or32.h"
#endif
#define DEBUG 0
#ifndef REGISTER_PREFIX
#define REGISTER_PREFIX '%'
#endif
/* Make it easier to clone this machine desc into another one. */
#define machine_opcode or32_opcode
#define machine_opcodes or32_opcodes
#define machine_ip or32_ip
#define machine_it or32_it
/* Handle of the OPCODE hash table. */
static struct hash_control *op_hash = NULL;
struct machine_it
{
char * error;
unsigned long opcode;
struct nlist * nlistp;
expressionS exp;
int pcrel;
int reloc_offset; /* Offset of reloc within insn. */
int reloc;
}
the_insn;
static void machine_ip PARAMS ((char *));
const pseudo_typeS md_pseudo_table[] =
{
{"align", s_align_bytes, 4 },
{"space", s_space, 0 },
{"cputype", s_ignore, 0 },
{"reg", s_lsym, 0 }, /* Register equate, same as equ. */
{"sect", s_ignore, 0 }, /* Creation of coff sections. */
{"proc", s_ignore, 0 }, /* Start of a function. */
{"endproc", s_ignore, 0 }, /* Function end. */
{"word", cons, 4 },
{NULL, 0, 0 },
};
int md_short_jump_size = 4;
int md_long_jump_size = 4;
#if defined(BFD_HEADERS)
#ifdef RELSZ
const int md_reloc_size = RELSZ; /* Coff headers. */
#else
const int md_reloc_size = 12; /* Something else headers. */
#endif
#else
const int md_reloc_size = 12; /* Not bfdized. */
#endif
/* This array holds the chars that always start a comment.
If the pre-processor is disabled, these aren't very useful. */
const char comment_chars[] = "#";
/* This array holds the chars that only start a comment at the beginning of
a line. If the line seems to have the form '# 123 filename'
.line and .file directives will appear in the pre-processed output. */
/* Note that input_file.c hand checks for '#' at the beginning of the
first line of the input file. This is because the compiler outputs
#NO_APP at the beginning of its output. */
/* Also note that comments like this one will always work. */
const char line_comment_chars[] = "#";
/* We needed an unused char for line separation to work around the
lack of macros, using sed and such. */
const char line_separator_chars[] = ";";
/* Chars that can be used to separate mant from exp in floating point nums. */
const char EXP_CHARS[] = "eE";
/* Chars that mean this number is a floating point constant.
As in 0f12.456
or 0d1.2345e12. */
const char FLT_CHARS[] = "rRsSfFdDxXpP";
/* "l.jalr r9" precalculated opcode. */
static unsigned long jalr_r9_opcode;
static int check_invalid_opcode PARAMS ((unsigned long));
static void encode PARAMS ((const struct machine_opcode *, unsigned long *, signed long, char));
#ifdef BFD_ASSEMBLER
static char * parse_operand PARAMS ((char *, expressionS *, int));
#endif
/* Set bits in machine opcode according to insn->encoding
description and passed operand. */
static void
encode (insn, opcode, param_val, param_ch)
const struct machine_opcode *insn;
unsigned long *opcode;
signed long param_val;
char param_ch;
{
int opc_pos = 0;
int param_pos = 0;
char *enc;
#if DEBUG
printf (" encode: opcode=%.8lx param_val=%.8lx abs=%.8lx param_ch=%c\n",
*opcode, param_val, abs (param_val), param_ch);
#endif
for (enc = insn->encoding; *enc != '\0'; enc++)
if (*enc == param_ch)
{
if (enc - 2 >= insn->encoding && (*(enc - 2) == '0') && (*(enc - 1) == 'x'))
continue;
else
param_pos ++;
}
opc_pos = 32;
for (enc = insn->encoding; *enc != '\0';)
{
if ((*enc == '0') && (*(enc + 1) == 'x'))
{
int tmp = strtol (enc, NULL, 16);
opc_pos -= 4;
*opcode |= tmp << opc_pos;
enc += 3;
}
else if ((*enc == '0') || (*enc == '-'))
{
opc_pos--;
enc++;
}
else if (*enc == '1')
{
opc_pos--;
*opcode |= 1 << opc_pos;
enc++;
}
else if (*enc == param_ch)
{
opc_pos--;
param_pos--;
*opcode |= ((param_val >> param_pos) & 0x1) << opc_pos;
enc++;
}
else if (ISALPHA (*enc))
{
opc_pos--;
enc++;
}
else
enc++;
}
#if DEBUG
printf (" opcode=%.8lx\n", *opcode);
#endif
}
/* This function is called once, at assembler startup time. It should
set up all the tables, etc., that the MD part of the assembler will
need. */
void
md_begin ()
{
const char *retval = NULL;
int lose = 0;
int skipnext = 0;
unsigned int i;
/* Hash up all the opcodes for fast use later. */
op_hash = hash_new ();
for (i = 0; i < or32_num_opcodes; i++)
{
const char *name = machine_opcodes[i].name;
if (skipnext)
{
skipnext = 0;
continue;
}
retval = hash_insert (op_hash, name, (PTR) &machine_opcodes[i]);
if (retval != NULL)
{
fprintf (stderr, "internal error: can't hash `%s': %s\n",
machine_opcodes[i].name, retval);
lose = 1;
}
}
if (lose)
as_fatal (_("Broken assembler. No assembly attempted."));
encode (&machine_opcodes[insn_index ("l.jalr")], &jalr_r9_opcode, 9, 'B');
}
/* Returs non zero if instruction is to be used. */
static int
check_invalid_opcode (opcode)
unsigned long opcode;
{
return opcode == jalr_r9_opcode;
}
/* Assemble a single instruction. Its label has already been handled
by the generic front end. We just parse opcode and operands, and
produce the bytes of data and relocation. */
void
md_assemble (str)
char *str;
{
char *toP;
#if DEBUG
printf ("NEW INSTRUCTION\n");
#endif
know (str);
machine_ip (str);
toP = frag_more (4);
/* Put out the opcode. */
md_number_to_chars (toP, the_insn.opcode, 4);
/* Put out the symbol-dependent stuff. */
#ifdef BFD_ASSEMBLER
if (the_insn.reloc != BFD_RELOC_NONE)
#else
if (the_insn.reloc != NO_RELOC)
#endif
{
fix_new_exp (frag_now,
(toP - frag_now->fr_literal + the_insn.reloc_offset),
4, /* size */
&the_insn.exp,
the_insn.pcrel,
the_insn.reloc);
}
}
/* This is true of the we have issued a "lo(" or "hi"(. */
static int waiting_for_shift = 0;
static int mask_or_shift = 0;
#ifdef BFD_ASSEMBLER
static char *
parse_operand (s, operandp, opt)
char *s;
expressionS *operandp;
int opt;
{
char *save = input_line_pointer;
char *new;
#if DEBUG
printf (" PROCESS NEW OPERAND(%s) == %c (%d)\n", s, opt ? opt : '!', opt);
#endif
input_line_pointer = s;
if (strncasecmp (s, "HI(", 3) == 0)
{
waiting_for_shift = 1;
mask_or_shift = BFD_RELOC_HI16;
input_line_pointer += 3;
}
else if (strncasecmp (s, "LO(", 3) == 0)
{
mask_or_shift = BFD_RELOC_LO16;
input_line_pointer += 3;
}
else
mask_or_shift = 0;
if ((*s == '(') && (*(s+1) == 'r'))
s++;
if ((*s == 'r') && ISDIGIT (*(s + 1)))
{
operandp->X_add_number = strtol (s + 1, NULL, 10);
operandp->X_op = O_register;
for (; (*s != ',') && (*s != '\0');)
s++;
input_line_pointer = save;
return s;
}
expression (operandp);
if (operandp->X_op == O_absent)
{
if (! opt)
as_bad (_("missing operand"));
else
{
operandp->X_add_number = 0;
operandp->X_op = O_constant;
}
}
new = input_line_pointer;
input_line_pointer = save;
#if DEBUG
printf (" %s=parse_operand(%s): operandp->X_op = %u\n", new, s, operandp->X_op);
#endif
return new;
}
#else
char *
parse_operand (s, operandp, opt)
char *s;
expressionS *operandp;
int opt;
{
char *save = input_line_pointer;
char *new;
#if DEBUG
printf (" PROCESS NEW OPERAND(%s) == %c (%d)\n", s, opt ? opt : '!', opt);
#endif
input_line_pointer = s;
if (strncasecmp (s, "HI(", 3) == 0)
{
waiting_for_shift = 1;
mask_or_shift = RELOC_CONSTH;
input_line_pointer += 3;
}
else if (strncasecmp (s, "LO(", 3) == 0)
{
mask_or_shift = RELOC_CONST;
input_line_pointer += 3;
}
else
mask_or_shift = 0;
expression (operandp);
if (operandp->X_op == O_absent)
{
if (! opt)
as_bad (_("missing operand"));
else
{
operandp->X_add_number = 0;
operandp->X_op = O_constant;
}
}
new = input_line_pointer;
input_line_pointer = save;
if ((operandp->X_op == O_symbol) && (*s != '_'))
{
#if DEBUG
printf ("symbol: '%s'\n", save);
#endif
for (save = s; s < new; s++)
if ((*s == REGISTER_PREFIX) && (*(s + 1) == 'r')) /* Register prefix. */
s++;
if ((*s == 'r') && ISDIGIT (*(s + 1)))
{
operandp->X_add_number = strtol (s + 1, NULL, 10);
operandp->X_op = O_register;
}
s = save;
}
#if DEBUG
printf (" %s=parse_operand(%s): operandp->X_op = %u\n", new, s, operandp->X_op);
#endif
return new;
}
#endif
/* Instruction parsing. Takes a string containing the opcode.
Operands are at input_line_pointer. Output is in the_insn.
Warnings or errors are generated. */
#ifdef BFD_ASSEMBLER
static void
machine_ip (str)
char *str;
{
char *s;
const char *args;
const struct machine_opcode *insn;
char *argsStart;
unsigned long opcode;
expressionS the_operand;
expressionS *operand = &the_operand;
unsigned int regno;
int reloc = BFD_RELOC_NONE;
#if DEBUG
printf ("machine_ip(%s)\n", str);
#endif
s = str;
for (; ISALNUM (*s) || *s == '.'; ++s)
if (ISUPPER (*s))
*s = TOLOWER (*s);
switch (*s)
{
case '\0':
break;
case ' ': /* FIXME-SOMEDAY more whitespace. */
*s++ = '\0';
break;
default:
as_bad (_("unknown opcode1: `%s'"), str);
return;
}
if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL)
{
as_bad (_("unknown opcode2 `%s'."), str);
return;
}
argsStart = s;
opcode = 0;
memset (&the_insn, '\0', sizeof (the_insn));
the_insn.reloc = BFD_RELOC_NONE;
reloc = BFD_RELOC_NONE;
/* Build the opcode, checking as we go to make sure that the
operands match.
If an operand matches, we modify the_insn or opcode appropriately,
and do a "continue". If an operand fails to match, we "break". */
if (insn->args[0] != '\0')
{
/* Prime the pump. */
s = parse_operand (s, operand, insn->args[0] == 'I');
}
for (args = insn->args;; ++args)
{
#if DEBUG
printf (" args = %s\n", args);
#endif
switch (*args)
{
case '\0': /* End of args. */
/* We have have 0 args, do the bazoooka! */
if (args == insn->args)
encode (insn, &opcode, 0, 0);
if (*s == '\0')
{
/* We are truly done. */
the_insn.opcode = opcode;
if (check_invalid_opcode (opcode))
as_bad (_("instruction not allowed: %s"), str);
return;
}
as_bad (_("too many operands: %s"), s);
break;
case ',': /* Must match a comma. */
if (*s++ == ',')
{
reloc = BFD_RELOC_NONE;
/* Parse next operand. */
s = parse_operand (s, operand, args[1] == 'I');
#if DEBUG
printf (" ',' case: operand->X_add_number = %d, *args = %s, *s = %s\n",
operand->X_add_number, args, s);
#endif
continue;
}
break;
case '(': /* Must match a (. */
s = parse_operand (s, operand, args[1] == 'I');
continue;
case ')': /* Must match a ). */
continue;
case 'r': /* A general register. */
args++;
if (operand->X_op != O_register)
break; /* Only registers. */
know (operand->X_add_symbol == 0);
know (operand->X_op_symbol == 0);
regno = operand->X_add_number;
encode (insn, &opcode, regno, *args);
#if DEBUG
printf (" r: operand->X_op = %d\n", operand->X_op);
#endif
continue;
default:
/* if (! ISALPHA (*args))
break; */ /* Only immediate values. */
if (mask_or_shift)
{
#if DEBUG
printf ("mask_or_shift = %d\n", mask_or_shift);
#endif
reloc = mask_or_shift;
}
mask_or_shift = 0;
if (strncasecmp (args, "LO(", 3) == 0)
{
#if DEBUG
printf ("reloc_const\n");
#endif
reloc = BFD_RELOC_LO16;
}
else if (strncasecmp (args, "HI(", 3) == 0)
{
#if DEBUG
printf ("reloc_consth\n");
#endif
reloc = BFD_RELOC_HI16;
}
if (*s == '(')
{
operand->X_op = O_constant;
#if 0
operand->X_add_number = 0; /* ??? if enabled load/store offsets
are zero. */
#endif
}
else if (*s == ')')
s += 1;
#if DEBUG
printf (" default case: operand->X_add_number = %d, *args = %s, *s = %s\n", operand->X_add_number, args, s);
#endif
if (operand->X_op == O_constant)
{
if (reloc == BFD_RELOC_NONE)
{
bfd_vma v, mask;
mask = 0x3ffffff;
v = abs (operand->X_add_number) & ~ mask;
if (v)
as_bad (_("call/jmp target out of range (1)"));
}
if (reloc == BFD_RELOC_HI16)
operand->X_add_number = ((operand->X_add_number >> 16) & 0xffff);
the_insn.pcrel = 0;
encode (insn, &opcode, operand->X_add_number, *args);
/* the_insn.reloc = BFD_RELOC_NONE; */
continue;
}
if (reloc == BFD_RELOC_NONE)
the_insn.reloc = BFD_RELOC_32_GOT_PCREL;
else
the_insn.reloc = reloc;
/* the_insn.reloc = insn->reloc; */
#if DEBUG
printf (" reloc sym=%d\n", the_insn.reloc);
printf (" BFD_RELOC_NONE=%d\n", BFD_RELOC_NONE);
#endif
the_insn.exp = *operand;
/* the_insn.reloc_offset = 1; */
the_insn.pcrel = 1; /* Assume PC-relative jump. */
/* FIXME-SOON, Do we figure out whether abs later, after
know sym val? */
if (reloc == BFD_RELOC_LO16 || reloc == BFD_RELOC_HI16)
the_insn.pcrel = 0;
encode (insn, &opcode, operand->X_add_number, *args);
continue;
}
/* Types or values of args don't match. */
as_bad (_("invalid operands"));
return;
}
}
#else
static void
machine_ip (str)
char *str;
{
char *s;
const char *args;
const struct machine_opcode *insn;
char *argsStart;
unsigned long opcode;
expressionS the_operand;
expressionS *operand = &the_operand;
unsigned int regno;
int reloc = NO_RELOC;
#if DEBUG
printf ("machine_ip(%s)\n", str);
#endif
s = str;
for (; ISALNUM (*s) || *s == '.'; ++s)
if (ISUPPER (*s))
*s = TOLOWER (*s);
switch (*s)
{
case '\0':
break;
case ' ': /* FIXME-SOMEDAY more whitespace. */
*s++ = '\0';
break;
default:
as_bad (_("unknown opcode1: `%s'"), str);
return;
}
if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL)
{
as_bad (_("unknown opcode2 `%s'."), str);
return;
}
argsStart = s;
opcode = 0;
memset (&the_insn, '\0', sizeof (the_insn));
the_insn.reloc = NO_RELOC;
reloc = NO_RELOC;
/* Build the opcode, checking as we go to make sure that the
operands match.
If an operand matches, we modify the_insn or opcode appropriately,
and do a "continue". If an operand fails to match, we "break". */
if (insn->args[0] != '\0')
/* Prime the pump. */
s = parse_operand (s, operand,
insn->args[0] == 'I'
|| strcmp (insn->name, "l.nop") == 0);
for (args = insn->args;; ++args)
{
#if DEBUG
printf (" args = %s\n", args);
#endif
switch (*args)
{
case '\0': /* End of args. */
/* We have have 0 args, do the bazoooka! */
if (args == insn->args)
encode (insn, &opcode, 0, 0);
if (*s == '\0')
{
/* We are truly done. */
the_insn.opcode = opcode;
if (check_invalid_opcode (opcode))
as_bad (_("instruction not allowed: %s"), str);
return;
}
as_bad (_("too many operands: %s"), s);
break;
case ',': /* Must match a comma. */
if (*s++ == ',')
{
reloc = NO_RELOC;
/* Parse next operand. */
s = parse_operand (s, operand, args[1] == 'I');
#if DEBUG
printf (" ',' case: operand->X_add_number = %d, *args = %s, *s = %s\n",
operand->X_add_number, args, s);
#endif
continue;
}
break;
case '(': /* Must match a (. */
s = parse_operand (s, operand, args[1] == 'I');
continue;
case ')': /* Must match a ). */
continue;
case 'r': /* A general register. */
args++;
if (operand->X_op != O_register)
break; /* Only registers. */
know (operand->X_add_symbol == 0);
know (operand->X_op_symbol == 0);
regno = operand->X_add_number;
encode (insn, &opcode, regno, *args);
#if DEBUG
printf (" r: operand->X_op = %d\n", operand->X_op);
#endif
continue;
default:
/* if (! ISALPHA (*args))
break; */ /* Only immediate values. */
if (mask_or_shift)
{
#if DEBUG
printf ("mask_or_shift = %d\n", mask_or_shift);
#endif
reloc = mask_or_shift;
}
mask_or_shift = 0;
if (strncasecmp (args, "LO(", 3) == 0)
{
#if DEBUG
printf ("reloc_const\n");
#endif
reloc = RELOC_CONST;
}
else if (strncasecmp (args, "HI(", 3) == 0)
{
#if DEBUG
printf ("reloc_consth\n");
#endif
reloc = RELOC_CONSTH;
}
if (*s == '(')
{
operand->X_op = O_constant;
#if 0
operand->X_add_number = 0; /* ??? if enabled load/store offsets
are zero. */
#endif
}
else if (*s == ')')
s += 1;
#if DEBUG
printf (" default case: operand->X_add_number = %d, *args = %s, *s = %s\n",
operand->X_add_number, args, s);
#endif
if (operand->X_op == O_constant)
{
if (reloc == NO_RELOC)
{
unsigned long v, mask;
mask = 0x3ffffff;
v = abs (operand->X_add_number) & ~ mask;
if (v)
as_bad (_("call/jmp target out of range (1)"));
}
if (reloc == RELOC_CONSTH)
operand->X_add_number = ((operand->X_add_number>>16) & 0xffff);
the_insn.pcrel = 0;
encode (insn, &opcode, operand->X_add_number, *args);
/* the_insn.reloc = NO_RELOC; */
continue;
}
if (reloc == NO_RELOC)
the_insn.reloc = RELOC_JUMPTARG;
else
the_insn.reloc = reloc;
#if DEBUG
printf (" reloc sym=%d\n", the_insn.reloc);
printf (" NO_RELOC=%d\n", NO_RELOC);
#endif
the_insn.exp = *operand;
/* the_insn.reloc_offset = 1; */
the_insn.pcrel = 1; /* Assume PC-relative jump. */
/* FIXME-SOON, Do we figure out whether abs later, after
know sym val? */
if (reloc == RELOC_CONST || reloc == RELOC_CONSTH)
the_insn.pcrel = 0;
encode (insn, &opcode, operand->X_add_number, *args);
continue;
}
/* Types or values of args don't match. */
as_bad (_("invalid operands"));
return;
}
}
#endif
/* This is identical to the md_atof in m68k.c. I think this is right,
but I'm not sure.
Turn a string in input_line_pointer into a floating point constant
of type type, and store the appropriate bytes in *litP. The number
of LITTLENUMS emitted is stored in *sizeP . An error message is
returned, or NULL on OK. */
/* Equal to MAX_PRECISION in atof-ieee.c. */
#define MAX_LITTLENUMS 6
char *
md_atof (type, litP, sizeP)
char type;
char * litP;
int * sizeP;
{
int prec;
LITTLENUM_TYPE words[MAX_LITTLENUMS];
LITTLENUM_TYPE *wordP;
char *t;
switch (type)
{
case 'f':
case 'F':
case 's':
case 'S':
prec = 2;
break;
case 'd':
case 'D':
case 'r':
case 'R':
prec = 4;
break;
case 'x':
case 'X':
prec = 6;
break;
case 'p':
case 'P':
prec = 6;
break;
default:
*sizeP = 0;
return _("Bad call to MD_ATOF()");
}
t = atof_ieee (input_line_pointer, type, words);
if (t)
input_line_pointer = t;
*sizeP = prec * sizeof (LITTLENUM_TYPE);
for (wordP = words; prec--;)
{
md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
litP += sizeof (LITTLENUM_TYPE);
}
return NULL;
}
/* Write out big-endian. */
void
md_number_to_chars (buf, val, n)
char *buf;
valueT val;
int n;
{
number_to_chars_bigendian (buf, val, n);
}
#ifdef BFD_ASSEMBLER
void
md_apply_fix3 (fixP, val, seg)
fixS * fixP;
valueT * val;
segT seg ATTRIBUTE_UNUSED;
{
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
long t_val;
t_val = (long) *val;
#if DEBUG
printf ("md_apply_fix val:%x\n", t_val);
#endif
fixP->fx_addnumber = t_val; /* Remember value for emit_reloc. */
know (fixP->fx_size == 4);
know (fixP->fx_r_type < BFD_RELOC_NONE);
switch (fixP->fx_r_type)
{
case BFD_RELOC_32: /* XXXXXXXX pattern in a word. */
#if DEBUG
printf ("reloc_const: val=%x\n", t_val);
#endif
buf[0] = t_val >> 24;
buf[1] = t_val >> 16;
buf[2] = t_val >> 8;
buf[3] = t_val;
break;
case BFD_RELOC_16: /* XXXX0000 pattern in a word. */
#if DEBUG
printf ("reloc_const: val=%x\n", t_val);
#endif
buf[0] = t_val >> 8;
buf[1] = t_val;
break;
case BFD_RELOC_8: /* XX000000 pattern in a word. */
#if DEBUG
printf ("reloc_const: val=%x\n", t_val);
#endif
buf[0] = t_val;
break;
case BFD_RELOC_LO16: /* 0000XXXX pattern in a word. */
#if DEBUG
printf ("reloc_const: val=%x\n", t_val);
#endif
buf[2] = t_val >> 8; /* Holds bits 0000XXXX. */
buf[3] = t_val;
break;
case BFD_RELOC_HI16: /* 0000XXXX pattern in a word. */
#if DEBUG
printf ("reloc_consth: val=%x\n", t_val);
#endif
buf[2] = t_val >> 24; /* Holds bits XXXX0000. */
buf[3] = t_val >> 16;
break;
case BFD_RELOC_32_GOT_PCREL: /* 0000XXXX pattern in a word. */
if (!fixP->fx_done)
{
/* The linker tries to support both AMD and old GNU style
R_IREL relocs. That means that if the addend is exactly
the negative of the address within the section, the
linker will not handle it correctly. */
#if 0
if (fixP->fx_pcrel
&& t_val != 0
&& t_val == - (fixP->fx_frag->fr_address + fixP->fx_where))
as_bad_where
(fixP->fx_file, fixP->fx_line,
_("the linker will not handle this relocation correctly (1)"));
#endif
}
else if (fixP->fx_pcrel)
{
long v = t_val >> 28;
if (v != 0 && v != -1)
as_bad_where (fixP->fx_file, fixP->fx_line,
_("call/jmp target out of range (2)"));
}
else
/* This case was supposed to be handled in machine_ip. */
abort ();
buf[0] |= (t_val >> 26) & 0x03; /* Holds bits 0FFFFFFC of address. */
buf[1] = t_val >> 18;
buf[2] = t_val >> 10;
buf[3] = t_val >> 2;
break;
case BFD_RELOC_VTABLE_INHERIT:
case BFD_RELOC_VTABLE_ENTRY:
fixP->fx_done = 0;
break;
case BFD_RELOC_NONE:
default:
as_bad (_("bad relocation type: 0x%02x"), fixP->fx_r_type);
break;
}
if (fixP->fx_addsy == (symbolS *) NULL)
fixP->fx_done = 1;
}
#else
void
md_apply_fix3 (fixP, valP, seg)
fixS *fixP;
valueT *valP;
segT seg ATTRIBUTE_UNUSED;
{
long val = *valP;
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
#if DEBUG
printf ("md_apply_fix val:%x\n", val);
#endif
fixP->fx_addnumber = val; /* Remember value for emit_reloc. */
know (fixP->fx_size == 4);
know (fixP->fx_r_type < NO_RELOC);
/* This is a hack. There should be a better way to handle this. */
if (fixP->fx_r_type == RELOC_WDISP30 && fixP->fx_addsy)
val += fixP->fx_where + fixP->fx_frag->fr_address;
switch (fixP->fx_r_type)
{
case RELOC_32:
buf[0] = val >> 24;
buf[1] = val >> 16;
buf[2] = val >> 8;
buf[3] = val;
break;
case RELOC_8:
buf[0] = val;
break;
case RELOC_WDISP30:
val = (val >>= 2) + 1;
buf[0] |= (val >> 24) & 0x3f;
buf[1] = (val >> 16);
buf[2] = val >> 8;
buf[3] = val;
break;
case RELOC_HI22:
buf[1] |= (val >> 26) & 0x3f;
buf[2] = val >> 18;
buf[3] = val >> 10;
break;
case RELOC_LO10:
buf[2] |= (val >> 8) & 0x03;
buf[3] = val;
break;
case RELOC_BASE13:
buf[2] |= (val >> 8) & 0x1f;
buf[3] = val;
break;
case RELOC_WDISP22:
val = (val >>= 2) + 1;
/* FALLTHROUGH */
case RELOC_BASE22:
buf[1] |= (val >> 16) & 0x3f;
buf[2] = val >> 8;
buf[3] = val;
break;
case RELOC_JUMPTARG: /* 0000XXXX pattern in a word. */
if (!fixP->fx_done)
{
/* The linker tries to support both AMD and old GNU style
R_IREL relocs. That means that if the addend is exactly
the negative of the address within the section, the
linker will not handle it correctly. */
#if 0
if (fixP->fx_pcrel
&& val != 0
&& val == - (fixP->fx_frag->fr_address + fixP->fx_where))
as_bad_where
(fixP->fx_file, fixP->fx_line,
_("the linker will not handle this relocation correctly (1)"));
#endif
}
else if (fixP->fx_pcrel)
{
long v = val >> 28;
#if 1
if (v != 0 && v != -1)
as_bad_where (fixP->fx_file, fixP->fx_line,
_("call/jmp target out of range (2)"));
#endif
}
else
/* This case was supposed to be handled in machine_ip. */
abort ();
buf[0] |= (val >> 26) & 0x03; /* Holds bits 0FFFFFFC of address. */
buf[1] = val >> 18;
buf[2] = val >> 10;
buf[3] = val >> 2;
break;
case RELOC_CONST: /* 0000XXXX pattern in a word. */
#if DEBUG
printf ("reloc_const: val=%x\n", val);
#endif
buf[2] = val >> 8; /* Holds bits 0000XXXX. */
buf[3] = val;
break;
case RELOC_CONSTH: /* 0000XXXX pattern in a word. */
#if DEBUG
printf ("reloc_consth: val=%x\n", val);
#endif
buf[2] = val >> 24; /* Holds bits XXXX0000. */
buf[3] = val >> 16;
break;
case BFD_RELOC_VTABLE_INHERIT:
case BFD_RELOC_VTABLE_ENTRY:
fixP->fx_done = 0;
break;
case NO_RELOC:
default:
as_bad (_("bad relocation type: 0x%02x"), fixP->fx_r_type);
break;
}
if (fixP->fx_addsy == (symbolS *) NULL)
fixP->fx_done = 1;
}
#endif
#ifdef OBJ_COFF
short
tc_coff_fix2rtype (fixP)
fixS *fixP;
{
#if DEBUG
printf ("tc_coff_fix2rtype\n");
#endif
switch (fixP->fx_r_type)
{
case RELOC_32:
return (R_WORD);
case RELOC_8:
return (R_BYTE);
case RELOC_CONST:
return (R_ILOHALF);
case RELOC_CONSTH:
return (R_IHIHALF);
case RELOC_JUMPTARG:
return (R_IREL);
default:
printf ("need %d\n", fixP->fx_r_type);
abort ();
}
return 0;
}
#endif /* OBJ_COFF */
/* Should never be called for or32. */
void
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
char * ptr ATTRIBUTE_UNUSED;
addressT from_addr ATTRIBUTE_UNUSED;
addressT to_addr ATTRIBUTE_UNUSED;
fragS * frag ATTRIBUTE_UNUSED;
symbolS * to_symbol ATTRIBUTE_UNUSED;
{
as_fatal ("or32_create_short_jmp\n");
}
/* Should never be called for or32. */
#ifndef BFD_ASSEMBLER
void
md_convert_frag (headers, seg, fragP)
object_headers * headers ATTRIBUTE_UNUSED;
segT seg ATTRIBUTE_UNUSED;
register fragS * fragP ATTRIBUTE_UNUSED;
{
as_fatal ("or32_convert_frag\n");
}
#else
void
md_convert_frag (headers, seg, fragP)
bfd * headers ATTRIBUTE_UNUSED;
segT seg ATTRIBUTE_UNUSED;
fragS * fragP ATTRIBUTE_UNUSED;
{
as_fatal ("or32_convert_frag\n");
}
#endif
/* Should never be called for or32. */
void
md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
char * ptr ATTRIBUTE_UNUSED;
addressT from_addr ATTRIBUTE_UNUSED;
addressT to_addr ATTRIBUTE_UNUSED;
fragS * frag ATTRIBUTE_UNUSED;
symbolS * to_symbol ATTRIBUTE_UNUSED;
{
as_fatal ("or32_create_long_jump\n");
}
/* Should never be called for or32. */
int
md_estimate_size_before_relax (fragP, segtype)
fragS * fragP ATTRIBUTE_UNUSED;
segT segtype ATTRIBUTE_UNUSED;
{
as_fatal ("or32_estimate_size_before_relax\n");
return 0;
}
/* Translate internal representation of relocation info to target format.
On sparc/29k: first 4 bytes are normal unsigned long address, next three
bytes are index, most sig. byte first. Byte 7 is broken up with
bit 7 as external, bits 6 & 5 unused, and the lower
five bits as relocation type. Next 4 bytes are long addend. */
/* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com. */
#ifdef OBJ_AOUT
void
tc_aout_fix_to_chars (where, fixP, segment_address_in_file)
char *where;
fixS *fixP;
relax_addressT segment_address_in_file;
{
long r_symbolnum;
#if DEBUG
printf ("tc_aout_fix_to_chars\n");
#endif
know (fixP->fx_r_type < BFD_RELOC_NONE);
know (fixP->fx_addsy != NULL);
md_number_to_chars
(where,
fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
4);
r_symbolnum = (S_IS_DEFINED (fixP->fx_addsy)
? S_GET_TYPE (fixP->fx_addsy)
: fixP->fx_addsy->sy_number);
where[4] = (r_symbolnum >> 16) & 0x0ff;
where[5] = (r_symbolnum >> 8) & 0x0ff;
where[6] = r_symbolnum & 0x0ff;
where[7] = (((!S_IS_DEFINED (fixP->fx_addsy)) << 7) & 0x80) | (0 & 0x60) | (fixP->fx_r_type & 0x1F);
/* Also easy. */
md_number_to_chars (&where[8], fixP->fx_addnumber, 4);
}
#endif /* OBJ_AOUT */
const char *md_shortopts = "";
struct option md_longopts[] =
{
{ NULL, no_argument, NULL, 0 }
};
size_t md_longopts_size = sizeof (md_longopts);
int
md_parse_option (c, arg)
int c ATTRIBUTE_UNUSED;
char * arg ATTRIBUTE_UNUSED;
{
return 0;
}
void
md_show_usage (stream)
FILE * stream ATTRIBUTE_UNUSED;
{
}
/* This is called when a line is unrecognized. This is used to handle
definitions of or32 style local labels. */
int
or32_unrecognized_line (c)
int c;
{
int lab;
char *s;
if (c != '$'
|| ! ISDIGIT ((unsigned char) input_line_pointer[0]))
return 0;
s = input_line_pointer;
lab = 0;
while (ISDIGIT ((unsigned char) *s))
{
lab = lab * 10 + *s - '0';
++s;
}
if (*s != ':')
/* Not a label definition. */
return 0;
if (dollar_label_defined (lab))
{
as_bad (_("label \"$%d\" redefined"), lab);
return 0;
}
define_dollar_label (lab);
colon (dollar_label_name (lab, 0));
input_line_pointer = s + 1;
return 1;
}
#ifndef BFD_ASSEMBLER
/* Record a fixup for a cons expression. */
/*
void
or32_cons_fix_new (frag, where, nbytes, exp)
fragS *frag;
int where;
int nbytes;
expressionS *exp;
{
fix_new_exp (frag, where, nbytes, exp, 0,
nbytes == 5 ? RELOC_32
: nbytes == 2 ? RELOC_16
: RELOC_8);
}
void
tc_aout_pre_write_hook ()
{
#if DEBUG
printf ("In tc_aout_pre_write_hook()\n");
#endif
}
*/
#endif
/* Default the values of symbols known that should be "predefined". We
don't bother to predefine them unless you actually use one, since there
are a lot of them. */
symbolS *
md_undefined_symbol (name)
char *name ATTRIBUTE_UNUSED;
{
#ifndef BFD_ASSEMBLER
long regnum;
char testbuf[5 + /*SLOP*/ 5];
#if DEBUG
printf ("md_undefined_symbol(%s)\n", name);
#endif
/* Register name. */
if (name[0] == 'r' || name[0] == 'R' || name[0] == 'a' || name[0] == 'b')
{
long maxreg;
/* Parse the number, make sure it has no extra zeroes or
trailing chars. */
regnum = atol (& name[1]);
if (regnum > 31)
as_fatal (_("register out of range"));
sprintf (testbuf, "%ld", regnum);
if (strcmp (testbuf, &name[1]) != 0)
return NULL; /* gr007 or lr7foo or whatever. */
/* We have a wiener! Define and return a new symbol for it. */
return (symbol_new (name, SEG_REGISTER, (valueT) regnum,
&zero_address_frag));
}
#endif
return NULL;
}
/* Parse an operand that is machine-specific. */
void
md_operand (expressionP)
expressionS *expressionP;
{
#if DEBUG
printf (" md_operand(input_line_pointer = %s)\n", input_line_pointer);
#endif
if (input_line_pointer[0] == REGISTER_PREFIX && input_line_pointer[1] == 'r')
{
/* We have a numeric register expression. No biggy. */
input_line_pointer += 2; /* Skip %r */
(void) expression (expressionP);
if (expressionP->X_op != O_constant
|| expressionP->X_add_number > 255)
as_bad (_("Invalid expression after %%%%\n"));
expressionP->X_op = O_register;
}
else if (input_line_pointer[0] == '&')
{
/* We are taking the 'address' of a register...this one is not
in the manual, but it *is* in traps/fpsymbol.h! What they
seem to want is the register number, as an absolute number. */
input_line_pointer++; /* Skip & */
(void) expression (expressionP);
if (expressionP->X_op != O_register)
as_bad (_("invalid register in & expression"));
else
expressionP->X_op = O_constant;
}
else if (input_line_pointer[0] == '$'
&& ISDIGIT ((unsigned char) input_line_pointer[1]))
{
long lab;
char *name;
symbolS *sym;
/* This is a local label. */
++input_line_pointer;
lab = (long) get_absolute_expression ();
if (dollar_label_defined (lab))
{
name = dollar_label_name (lab, 0);
sym = symbol_find (name);
}
else
{
name = dollar_label_name (lab, 1);
sym = symbol_find_or_make (name);
}
expressionP->X_op = O_symbol;
expressionP->X_add_symbol = sym;
expressionP->X_add_number = 0;
}
else if (input_line_pointer[0] == '$')
{
char *s;
char type;
int fieldnum, fieldlimit;
LITTLENUM_TYPE floatbuf[8];
/* $float(), $doubleN(), or $extendN() convert floating values
to integers. */
s = input_line_pointer;
++s;
fieldnum = 0;
if (strncmp (s, "double", sizeof "double" - 1) == 0)
{
s += sizeof "double" - 1;
type = 'd';
fieldlimit = 2;
}
else if (strncmp (s, "float", sizeof "float" - 1) == 0)
{
s += sizeof "float" - 1;
type = 'f';
fieldlimit = 1;
}
else if (strncmp (s, "extend", sizeof "extend" - 1) == 0)
{
s += sizeof "extend" - 1;
type = 'x';
fieldlimit = 4;
}
else
return;
if (ISDIGIT (*s))
{
fieldnum = *s - '0';
++s;
}
if (fieldnum >= fieldlimit)
return;
SKIP_WHITESPACE ();
if (*s != '(')
return;
++s;
SKIP_WHITESPACE ();
s = atof_ieee (s, type, floatbuf);
if (s == NULL)
return;
s = s;
SKIP_WHITESPACE ();
if (*s != ')')
return;
++s;
SKIP_WHITESPACE ();
input_line_pointer = s;
expressionP->X_op = O_constant;
expressionP->X_unsigned = 1;
expressionP->X_add_number = ((floatbuf[fieldnum * 2]
<< LITTLENUM_NUMBER_OF_BITS)
+ floatbuf[fieldnum * 2 + 1]);
}
}
/* Round up a section size to the appropriate boundary. */
valueT
md_section_align (segment, size)
segT segment ATTRIBUTE_UNUSED;
valueT size ATTRIBUTE_UNUSED;
{
return size; /* Byte alignment is fine. */
}
/* Exactly what point is a PC-relative offset relative TO?
On the 29000, they're relative to the address of the instruction,
which we have set up as the address of the fixup too. */
long
md_pcrel_from (fixP)
fixS *fixP;
{
return fixP->fx_where + fixP->fx_frag->fr_address;
}
/* Generate a reloc for a fixup. */
#ifdef BFD_ASSEMBLER
arelent *
tc_gen_reloc (seg, fixp)
asection *seg ATTRIBUTE_UNUSED;
fixS *fixp;
{
arelent *reloc;
reloc = (arelent *) xmalloc (sizeof (arelent));
reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
/* reloc->address = fixp->fx_frag->fr_address + fixp->fx_where + fixp->fx_addnumber;*/
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
if (reloc->howto == (reloc_howto_type *) NULL)
{
as_bad_where (fixp->fx_file, fixp->fx_line,
_("reloc %d not supported by object file format"),
(int) fixp->fx_r_type);
return NULL;
}
if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
reloc->address = fixp->fx_offset;
reloc->addend = fixp->fx_addnumber;
return reloc;
}
#endif
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