/* i386.c -- Assemble code for the Intel 80386
Copyright (C) 1989, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
- Free Software Foundation.
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
-/*
- Intel 80386 machine specific gas.
- Written by Eliot Dresselhaus (eliot@mgm.mit.edu).
- Bugs & suggestions are completely welcome. This is free software.
- Please help us make it better.
- */
+/* Intel 80386 machine specific gas.
+ Written by Eliot Dresselhaus (eliot@mgm.mit.edu).
+ Bugs & suggestions are completely welcome. This is free software.
+ Please help us make it better. */
#include <ctype.h>
#include "as.h"
#include "subsegs.h"
+#include "dwarf2dbg.h"
#include "opcode/i386.h"
#ifndef REGISTER_WARNINGS
static offsetT offset_in_range PARAMS ((offsetT, int));
static int add_prefix PARAMS ((unsigned int));
static void set_16bit_code_flag PARAMS ((int));
-static void set_16bit_gcc_code_flag PARAMS((int));
+static void set_16bit_gcc_code_flag PARAMS ((int));
static void set_intel_syntax PARAMS ((int));
static void set_cpu_arch PARAMS ((int));
#endif
/* 'md_assemble ()' gathers together information and puts it into a
- i386_insn. */
+ i386_insn. */
union i386_op
{
struct _i386_insn
{
- /* TM holds the template for the insn were currently assembling. */
+ /* TM holds the template for the insn were currently assembling. */
template tm;
/* SUFFIX holds the instruction mnemonic suffix if given.
(e.g. 'l' for 'movl') */
char suffix;
- /* OPERANDS gives the number of given operands. */
+ /* OPERANDS gives the number of given operands. */
unsigned int operands;
/* REG_OPERANDS, DISP_OPERANDS, MEM_OPERANDS, IMM_OPERANDS give the number
of given register, displacement, memory operands and immediate
- operands. */
+ operands. */
unsigned int reg_operands, disp_operands, mem_operands, imm_operands;
/* TYPES [i] is the type (see above #defines) which tells us how to
unsigned int log2_scale_factor;
/* SEG gives the seg_entries of this insn. They are zero unless
- explicit segment overrides are given. */
- const seg_entry *seg[2]; /* segments for memory operands (if given) */
+ explicit segment overrides are given. */
+ const seg_entry *seg[2];
/* PREFIX holds all the given prefix opcodes (usually null).
PREFIXES is the number of prefix opcodes. */
#endif
/* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
-#if defined (TE_I386AIX) || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (TE_LINUX) && !defined(TE_FreeBSD))
+ pre-processor is disabled, these aren't very useful. */
+#if defined (TE_I386AIX) || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && ! defined (TE_LINUX) && !defined(TE_FreeBSD))
/* Putting '/' here makes it impossible to use the divide operator.
However, we need it for compatibility with SVR4 systems. */
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
+ .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 started like this one will always work if
+ #NO_APP at the beginning of its output.
+ Also note that comments started like this one will always work if
'/' isn't otherwise defined. */
-#if defined (TE_I386AIX) || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (TE_LINUX) && !defined(TE_FreeBSD))
+#if defined (TE_I386AIX) || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && ! defined (TE_LINUX) && !defined(TE_FreeBSD))
const char line_comment_chars[] = "";
#else
const char line_comment_chars[] = "/";
#endif
-const char line_separator_chars[] = "";
+const char line_separator_chars[] = ";";
-/* Chars that can be used to separate mant from exp in floating point nums */
+/* 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 */
+/* Chars that mean this number is a floating point constant
+ As in 0f12.456
+ or 0d1.2345e12. */
const char FLT_CHARS[] = "fFdDxX";
-/* tables for lexical analysis */
+/* Tables for lexical analysis. */
static char mnemonic_chars[256];
static char register_chars[256];
static char operand_chars[256];
static char identifier_chars[256];
static char digit_chars[256];
-/* lexical macros */
+/* Lexical macros. */
#define is_mnemonic_char(x) (mnemonic_chars[(unsigned char) x])
#define is_operand_char(x) (operand_chars[(unsigned char) x])
#define is_register_char(x) (register_chars[(unsigned char) x])
#define is_identifier_char(x) (identifier_chars[(unsigned char) x])
#define is_digit_char(x) (digit_chars[(unsigned char) x])
-/* put here all non-digit non-letter charcters that may occur in an operand */
+/* All non-digit non-letter charcters that may occur in an operand. */
static char operand_special_chars[] = "%$-+(,)*._~/<>|&^!:[@]";
/* md_assemble() always leaves the strings it's passed unaltered. To
effect this we maintain a stack of saved characters that we've smashed
with '\0's (indicating end of strings for various sub-fields of the
- assembler instruction). */
+ assembler instruction). */
static char save_stack[32];
-static char *save_stack_p; /* stack pointer */
+static char *save_stack_p;
#define END_STRING_AND_SAVE(s) \
do { *save_stack_p++ = *(s); *(s) = '\0'; } while (0)
#define RESTORE_END_STRING(s) \
do { *(s) = *--save_stack_p; } while (0)
-/* The instruction we're assembling. */
+/* The instruction we're assembling. */
static i386_insn i;
/* Possible templates for current insn. */
static const templates *current_templates;
-/* Per instruction expressionS buffers: 2 displacements & 2 immediate max. */
+/* Per instruction expressionS buffers: 2 displacements & 2 immediate max. */
static expressionS disp_expressions[2], im_expressions[2];
-static int this_operand; /* Current operand we are working on. */
+/* Current operand we are working on. */
+static int this_operand;
-static int flag_do_long_jump; /* FIXME what does this do? */
+/* 1 if we're writing 16-bit code,
+ 0 if 32-bit. */
+static int flag_16bit_code;
-static int flag_16bit_code; /* 1 if we're writing 16-bit code,
- 0 if 32-bit. */
+/* 1 for intel syntax,
+ 0 if att syntax. */
+static int intel_syntax = 0;
-static int intel_syntax = 0; /* 1 for intel syntax, 0 if att syntax. */
+/* 1 if register prefix % not required. */
+static int allow_naked_reg = 0;
-static const char *cpu_arch_name = NULL; /* cpu name */
+/* Used in 16 bit gcc mode to add an l suffix to call, ret, enter,
+ leave, push, and pop instructions so that gcc has the same stack
+ frame as in 32 bit mode. */
+static char stackop_size = '\0';
-static unsigned int cpu_arch_flags = 0; /* cpu feature flags */
+/* Non-zero to quieten some warnings. */
+static int quiet_warnings = 0;
-static int allow_naked_reg = 0; /* 1 if register prefix % not required */
+/* CPU name. */
+static const char *cpu_arch_name = NULL;
-static char stackop_size = '\0'; /* Used in 16 bit gcc mode to add an l
- suffix to call, ret, enter, leave, push,
- and pop instructions so that gcc has the
- same stack frame as in 32 bit mode. */
+/* CPU feature flags. */
+static unsigned int cpu_arch_flags = 0;
/* Interface to relax_segment.
There are 2 relax states for 386 jump insns: one for conditional &
jumps add different sizes to frags when we're figuring out what
sort of jump to choose to reach a given label. */
-/* types */
-#define COND_JUMP 1 /* conditional jump */
-#define UNCOND_JUMP 2 /* unconditional jump */
-/* sizes */
+/* Types. */
+#define COND_JUMP 1
+#define UNCOND_JUMP 2
+/* Sizes. */
#define CODE16 1
#define SMALL 0
#define SMALL16 (SMALL|CODE16)
#endif
#define ENCODE_RELAX_STATE(type,size) \
- ((relax_substateT)((type<<2) | (size)))
+ ((relax_substateT) ((type<<2) | (size)))
#define SIZE_FROM_RELAX_STATE(s) \
( (((s) & 0x3) == BIG ? 4 : (((s) & 0x3) == BIG16 ? 2 : 1)) )
1) most positive reach of this state,
2) most negative reach of this state,
3) how many bytes this mode will add to the size of the current frag
- 4) which index into the table to try if we can't fit into this one.
- */
+ 4) which index into the table to try if we can't fit into this one. */
{1, 1, 0, 0},
{1, 1, 0, 0},
{1, 1, 0, 0},
{NULL, 0 }
};
-
void
i386_align_code (fragP, count)
fragS *fragP;
int count;
{
- /* Various efficient no-op patterns for aligning code labels. */
- /* Note: Don't try to assemble the instructions in the comments. */
- /* 0L and 0w are not legal */
+ /* Various efficient no-op patterns for aligning code labels.
+ Note: Don't try to assemble the instructions in the comments.
+ 0L and 0w are not legal. */
static const char f32_1[] =
{0x90}; /* nop */
static const char f32_2[] =
{
if (flag_16bit_code)
{
- memcpy(fragP->fr_literal + fragP->fr_fix,
- f16_patt[count - 1], count);
- if (count > 8) /* adjust jump offset */
+ memcpy (fragP->fr_literal + fragP->fr_fix,
+ f16_patt[count - 1], count);
+ if (count > 8)
+ /* Adjust jump offset. */
fragP->fr_literal[fragP->fr_fix + 1] = count - 2;
}
else
- memcpy(fragP->fr_literal + fragP->fr_fix,
- f32_patt[count - 1], count);
+ memcpy (fragP->fr_literal + fragP->fr_fix,
+ f32_patt[count - 1], count);
fragP->fr_var = count;
}
}
static void s_bss PARAMS ((int));
#endif
-symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */
+symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
static INLINE unsigned int
mode_from_disp_size (t)
unsigned int t;
{
- return (t & Disp8) ? 1 : (t & (Disp16|Disp32)) ? 2 : 0;
+ return (t & Disp8) ? 1 : (t & (Disp16 | Disp32)) ? 2 : 0;
}
static INLINE int
offsetT num;
{
return (num >= -128) && (num <= 127);
-} /* fits_in_signed_byte() */
+}
static INLINE int
fits_in_unsigned_byte (num)
offsetT num;
{
return (num & 0xff) == num;
-} /* fits_in_unsigned_byte() */
+}
static INLINE int
fits_in_unsigned_word (num)
offsetT num;
{
return (num & 0xffff) == num;
-} /* fits_in_unsigned_word() */
+}
static INLINE int
fits_in_signed_word (num)
offsetT num;
{
return (-32768 <= num) && (num <= 32767);
-} /* fits_in_signed_word() */
+}
static int
smallest_imm_type (num)
offsetT num;
{
if (cpu_arch_flags != 0
- && cpu_arch_flags != (Cpu086|Cpu186|Cpu286|Cpu386|Cpu486))
+ && cpu_arch_flags != (Cpu086 | Cpu186 | Cpu286 | Cpu386 | Cpu486))
{
/* This code is disabled on the 486 because all the Imm1 forms
in the opcode table are slower on the i486. They're the
: (fits_in_signed_word (num) || fits_in_unsigned_word (num))
? (Imm16 | Imm32)
: (Imm32));
-} /* smallest_imm_type() */
+}
static offsetT
offset_in_range (val, size)
case 1: mask = ((addressT) 1 << 8) - 1; break;
case 2: mask = ((addressT) 1 << 16) - 1; break;
case 4: mask = ((addressT) 2 << 31) - 1; break;
- default: abort();
+ default: abort ();
}
/* If BFD64, sign extend val. */
- if ((val & ~ (((addressT) 2 << 31) - 1)) == 0)
+ if ((val & ~(((addressT) 2 << 31) - 1)) == 0)
val = (val ^ ((addressT) 1 << 31)) - ((addressT) 1 << 31);
- if ((val & ~ mask) != 0 && (val & ~ mask) != ~ mask)
+ if ((val & ~mask) != 0 && (val & ~mask) != ~mask)
{
char buf1[40], buf2[40];
char *string = input_line_pointer;
int e = get_symbol_end ();
- if (strcmp(string, "prefix") == 0)
+ if (strcmp (string, "prefix") == 0)
ask_naked_reg = 1;
- else if (strcmp(string, "noprefix") == 0)
+ else if (strcmp (string, "noprefix") == 0)
ask_naked_reg = -1;
else
as_bad (_("bad argument to syntax directive."));
allow_naked_reg = (intel_syntax
&& (bfd_get_symbol_leading_char (stdoutput) != '\0'));
#else
- allow_naked_reg = 0; /* conservative default */
+ /* Conservative default. */
+ allow_naked_reg = 0;
#endif
}
else
static void
set_cpu_arch (dummy)
- int dummy ATTRIBUTE_UNUSED;
+ int dummy ATTRIBUTE_UNUSED;
{
- SKIP_WHITESPACE();
+ SKIP_WHITESPACE ();
if (! is_end_of_line[(unsigned char) *input_line_pointer])
{
{"code32", set_16bit_code_flag, 0},
{"intel_syntax", set_intel_syntax, 1},
{"att_syntax", set_intel_syntax, 0},
+ {"file", dwarf2_directive_file, 0},
+ {"loc", dwarf2_directive_loc, 0},
{0, 0, 0}
};
-/* for interface with expression () */
+/* For interface with expression (). */
extern char *input_line_pointer;
-/* hash table for instruction mnemonic lookup */
+/* Hash table for instruction mnemonic lookup. */
static struct hash_control *op_hash;
-/* hash table for register lookup */
+
+/* Hash table for register lookup. */
static struct hash_control *reg_hash;
\f
-
void
md_begin ()
{
const char *hash_err;
- /* initialize op_hash hash table */
+ /* Initialize op_hash hash table. */
op_hash = hash_new ();
{
register const template *optab;
register templates *core_optab;
- optab = i386_optab; /* setup for loop */
+ /* Setup for loop. */
+ optab = i386_optab;
core_optab = (templates *) xmalloc (sizeof (templates));
core_optab->start = optab;
|| strcmp (optab->name, (optab - 1)->name) != 0)
{
/* different name --> ship out current template list;
- add to hash table; & begin anew */
+ add to hash table; & begin anew. */
core_optab->end = optab;
hash_err = hash_insert (op_hash,
(optab - 1)->name,
}
}
- /* initialize reg_hash hash table */
+ /* Initialize reg_hash hash table. */
reg_hash = hash_new ();
{
register const reg_entry *regtab;
}
}
- /* fill in lexical tables: mnemonic_chars, operand_chars. */
+ /* Fill in lexical tables: mnemonic_chars, operand_chars. */
{
register int c;
register char *p;
hash_print_statistics (file, "i386 register", reg_hash);
}
\f
-
#ifdef DEBUG386
-/* debugging routines for md_assemble */
+/* Debugging routines for md_assemble. */
static void pi PARAMS ((char *, i386_insn *));
static void pte PARAMS ((template *));
static void pt PARAMS ((unsigned int));
{
int i;
fprintf (stdout, " %d operands ", t->operands);
- fprintf (stdout, "opcode %x ",
- t->base_opcode);
+ fprintf (stdout, "opcode %x ", t->base_opcode);
if (t->extension_opcode != None)
fprintf (stdout, "ext %x ", t->extension_opcode);
if (t->opcode_modifier & D)
return 1;
return 0;
#else
- /* For COFF */
+ /* For COFF. */
return fixp->fx_r_type == 7;
#endif
}
int pcrel;
bfd_reloc_code_real_type other;
{
- if (other != NO_RELOC) return other;
+ if (other != NO_RELOC)
+ return other;
if (pcrel)
{
return BFD_RELOC_NONE;
}
-/*
- * Here we decide which fixups can be adjusted to make them relative to
- * the beginning of the section instead of the symbol. Basically we need
- * to make sure that the dynamic relocations are done correctly, so in
- * some cases we force the original symbol to be used.
- */
+/* Here we decide which fixups can be adjusted to make them relative to
+ the beginning of the section instead of the symbol. Basically we need
+ to make sure that the dynamic relocations are done correctly, so in
+ some cases we force the original symbol to be used. */
+
int
tc_i386_fix_adjustable (fixP)
fixS *fixP;
{
-#if defined (OBJ_ELF) || defined (TE_PE)
+#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
/* Prevent all adjustments to global symbols, or else dynamic
linking will not work correctly. */
- if (S_IS_EXTERN (fixP->fx_addsy))
- return 0;
- if (S_IS_WEAK (fixP->fx_addsy))
+ if (S_IS_EXTERNAL (fixP->fx_addsy)
+ || S_IS_WEAK (fixP->fx_addsy))
return 0;
#endif
- /* adjust_reloc_syms doesn't know about the GOT */
+ /* adjust_reloc_syms doesn't know about the GOT. */
if (fixP->fx_r_type == BFD_RELOC_386_GOTOFF
|| fixP->fx_r_type == BFD_RELOC_386_PLT32
|| fixP->fx_r_type == BFD_RELOC_386_GOT32
- || fixP->fx_r_type == BFD_RELOC_RVA
|| fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
return 0;
#define BFD_RELOC_386_GOTOFF 0
#endif
-static int
-intel_float_operand PARAMS ((char *mnemonic));
+static int intel_float_operand PARAMS ((char *mnemonic));
static int
intel_float_operand (mnemonic)
char *mnemonic;
{
- if (mnemonic[0] == 'f' && mnemonic[1] =='i')
+ if (mnemonic[0] == 'f' && mnemonic[1] == 'i')
return 2;
if (mnemonic[0] == 'f')
md_assemble (line)
char *line;
{
- /* Points to template once we've found it. */
+ /* Points to template once we've found it. */
const template *t;
/* Count the size of the instruction generated. */
char mnemonic[MAX_MNEM_SIZE];
- /* Initialize globals. */
+ /* Initialize globals. */
memset (&i, '\0', sizeof (i));
for (j = 0; j < MAX_OPERANDS; j++)
i.disp_reloc[j] = NO_RELOC;
memset (disp_expressions, '\0', sizeof (disp_expressions));
memset (im_expressions, '\0', sizeof (im_expressions));
- save_stack_p = save_stack; /* reset stack pointer */
+ save_stack_p = save_stack;
/* First parse an instruction mnemonic & call i386_operand for the operands.
We assume that the scrubber has arranged it so that line[0] is the valid
- start of a (possibly prefixed) mnemonic. */
+ start of a (possibly prefixed) mnemonic. */
{
char *l = line;
char *token_start = l;
char *mnem_p;
- /* Non-zero if we found a prefix only acceptable with string insns. */
+ /* Non-zero if we found a prefix only acceptable with string insns. */
const char *expecting_string_instruction = NULL;
while (1)
case 0:
return;
case 2:
- expecting_string_instruction =
- current_templates->start->name;
+ expecting_string_instruction = current_templates->start->name;
break;
}
/* Skip past PREFIX_SEPARATOR and reset token_start. */
current_templates = hash_find (op_hash, mnemonic);
break;
- /* Intel Syntax */
+ /* Intel Syntax. */
case DWORD_MNEM_SUFFIX:
if (intel_syntax)
{
/* Check if instruction is supported on specified architecture. */
if (cpu_arch_flags != 0)
{
- if (current_templates->start->cpu_flags & ~ cpu_arch_flags)
+ if (current_templates->start->cpu_flags & ~cpu_arch_flags)
{
as_warn (_("`%s' is not supported on `%s'"),
current_templates->start->name, cpu_arch_name);
}
- else if ((Cpu386 & ~ cpu_arch_flags) && !flag_16bit_code)
+ else if ((Cpu386 & ~cpu_arch_flags) && !flag_16bit_code)
{
as_warn (_("use .code16 to ensure correct addressing mode"));
}
}
- /* check for rep/repne without a string instruction */
+ /* Check for rep/repne without a string instruction. */
if (expecting_string_instruction
&& !(current_templates->start->opcode_modifier & IsString))
{
return;
}
- /* There may be operands to parse. */
+ /* There may be operands to parse. */
if (*l != END_OF_INSN)
{
- /* parse operands */
-
- /* 1 if operand is pending after ','. */
+ /* 1 if operand is pending after ','. */
unsigned int expecting_operand = 0;
- /* Non-zero if operand parens not balanced. */
+ /* Non-zero if operand parens not balanced. */
unsigned int paren_not_balanced;
do
{
- /* skip optional white space before operand */
+ /* Skip optional white space before operand. */
if (is_space_char (*l))
++l;
if (!is_operand_char (*l) && *l != END_OF_INSN)
l++;
}
if (l != token_start)
- { /* yes, we've read in another operand */
+ { /* Yes, we've read in another operand. */
unsigned int operand_ok;
this_operand = i.operands++;
if (i.operands > MAX_OPERANDS)
MAX_OPERANDS);
return;
}
- /* now parse operand adding info to 'i' as we go along */
+ /* Now parse operand adding info to 'i' as we go along. */
END_STRING_AND_SAVE (l);
if (intel_syntax)
- operand_ok = i386_intel_operand (token_start, intel_float_operand (mnemonic));
+ operand_ok =
+ i386_intel_operand (token_start,
+ intel_float_operand (mnemonic));
else
operand_ok = i386_operand (token_start);
- RESTORE_END_STRING (l); /* restore old contents */
+ RESTORE_END_STRING (l);
if (!operand_ok)
return;
}
}
}
- /* now *l must be either ',' or END_OF_INSN */
+ /* Now *l must be either ',' or END_OF_INSN. */
if (*l == ',')
{
if (*++l == END_OF_INSN)
- { /* just skip it, if it's \n complain */
+ {
+ /* Just skip it, if it's \n complain. */
goto expecting_operand_after_comma;
}
expecting_operand = 1;
}
}
- while (*l != END_OF_INSN); /* until we get end of insn */
+ while (*l != END_OF_INSN);
}
}
Next, we find a template that matches the given insn,
making sure the overlap of the given operands types is consistent
- with the template operand types. */
+ with the template operand types. */
#define MATCH(overlap, given, template) \
((overlap & ~JumpAbsolute) \
{
union i386_op temp_op;
unsigned int temp_type;
+#ifdef BFD_ASSEMBLER
+ enum bfd_reloc_code_real temp_disp_reloc;
+#else
+ int temp_disp_reloc;
+#endif
int xchg1 = 0;
int xchg2 = 0;
temp_op = i.op[xchg2];
i.op[xchg2] = i.op[xchg1];
i.op[xchg1] = temp_op;
+ temp_disp_reloc = i.disp_reloc[xchg2];
+ i.disp_reloc[xchg2] = i.disp_reloc[xchg1];
+ i.disp_reloc[xchg1] = temp_disp_reloc;
if (i.mem_operands == 2)
{
We can't do this properly yet, ie. excluding InOutPortReg,
but the following works for instructions with immediates.
In any case, we can't set i.suffix yet. */
- for (op = i.operands; --op >= 0; )
+ for (op = i.operands; --op >= 0;)
if (i.types[op] & Reg)
{
if (i.types[op] & Reg8)
else if (flag_16bit_code ^ (i.prefix[DATA_PREFIX] != 0))
guess_suffix = WORD_MNEM_SUFFIX;
- for (op = i.operands; --op >= 0; )
+ for (op = i.operands; --op >= 0;)
if ((i.types[op] & Imm)
&& i.op[op].imms->X_op == O_constant)
{
}
}
+ if (i.disp_operands)
+ {
+ /* Try to use the smallest displacement type too. */
+ int op;
+
+ for (op = i.operands; --op >= 0;)
+ if ((i.types[op] & Disp)
+ && i.op[op].imms->X_op == O_constant)
+ {
+ offsetT disp = i.op[op].disps->X_add_number;
+
+ if (i.types[op] & Disp16)
+ {
+ /* We know this operand is at most 16 bits, so
+ convert to a signed 16 bit number before trying
+ to see whether it will fit in an even smaller
+ size. */
+
+ disp = (((disp & 0xffff) ^ 0x8000) - 0x8000);
+ }
+ if (fits_in_signed_byte (disp))
+ i.types[op] |= Disp8;
+ }
+ }
+
overlap0 = 0;
overlap1 = 0;
overlap2 = 0;
t < current_templates->end;
t++)
{
- /* Must have right number of operands. */
+ /* Must have right number of operands. */
if (i.operands != t->operands)
continue;
/* Check the suffix, except for some instructions in intel mode. */
if ((t->opcode_modifier & suffix_check)
+ && !(intel_syntax
+ && (t->opcode_modifier & IgnoreSize))
&& !(intel_syntax
&& t->base_opcode == 0xd9
- && (t->extension_opcode == 5 /* 0xd9,5 "fldcw" */
- || t->extension_opcode == 7))) /* 0xd9,7 "f{n}stcw" */
+ && (t->extension_opcode == 5 /* 0xd9,5 "fldcw" */
+ || t->extension_opcode == 7))) /* 0xd9,7 "f{n}stcw" */
continue;
else if (!t->operands)
- break; /* 0 operands always matches */
+ /* 0 operands always matches. */
+ break;
overlap0 = i.types[0] & t->operand_types[0];
switch (t->operands)
overlap1, i.types[1],
t->operand_types[1]))
{
-
- /* check if other direction is valid ... */
+ /* Check if other direction is valid ... */
if ((t->opcode_modifier & (D|FloatD)) == 0)
continue;
- /* try reversing direction of operands */
+ /* Try reversing direction of operands. */
overlap0 = i.types[0] & t->operand_types[1];
overlap1 = i.types[1] & t->operand_types[0];
if (!MATCH (overlap0, i.types[0], t->operand_types[1])
overlap1, i.types[1],
t->operand_types[0]))
{
- /* does not match either direction */
+ /* Does not match either direction. */
continue;
}
/* found_reverse_match holds which of D or FloatDR
found_reverse_match = t->opcode_modifier & (D|FloatDR);
break;
}
- /* found a forward 2 operand match here */
+ /* Found a forward 2 operand match here. */
if (t->operands == 3)
{
/* Here we make use of the fact that there are no
continue;
}
- /* found either forward/reverse 2 or 3 operand match here:
- slip through to break */
+ /* Found either forward/reverse 2 or 3 operand match here:
+ slip through to break. */
}
- break; /* we've found a match; break out of loop */
- } /* for (t = ... */
+ /* We've found a match; break out of loop. */
+ break;
+ }
if (t == current_templates->end)
- { /* we found no match */
+ {
+ /* We found no match. */
as_bad (_("suffix or operands invalid for `%s'"),
current_templates->start->name);
return;
}
- if (!intel_syntax
- && (i.types[0] & JumpAbsolute) != (t->operand_types[0] & JumpAbsolute))
+ if (!quiet_warnings)
{
- as_warn (_("indirect %s without `*'"), t->name);
- }
+ if (!intel_syntax
+ && ((i.types[0] & JumpAbsolute)
+ != (t->operand_types[0] & JumpAbsolute)))
+ {
+ as_warn (_("indirect %s without `*'"), t->name);
+ }
- if ((t->opcode_modifier & (IsPrefix|IgnoreSize)) == (IsPrefix|IgnoreSize))
- {
- /* Warn them that a data or address size prefix doesn't affect
- assembly of the next line of code. */
- as_warn (_("stand-alone `%s' prefix"), t->name);
+ if ((t->opcode_modifier & (IsPrefix|IgnoreSize))
+ == (IsPrefix|IgnoreSize))
+ {
+ /* Warn them that a data or address size prefix doesn't
+ affect assembly of the next line of code. */
+ as_warn (_("stand-alone `%s' prefix"), t->name);
+ }
}
/* Copy the template we found. */
if (! add_prefix (FWAIT_OPCODE))
return;
- /* Check string instruction segment overrides */
+ /* Check string instruction segment overrides. */
if ((i.tm.opcode_modifier & IsString) != 0 && i.mem_operands != 0)
{
int mem_op = (i.types[0] & AnyMem) ? 0 : 1;
else if (i.reg_operands)
{
/* If there's no instruction mnemonic suffix we try to invent one
- based on register operands. */
+ based on register operands. */
if (!i.suffix)
{
/* We take i.suffix from the last register operand specified,
Destination register type is more significant than source
register type. */
int op;
- for (op = i.operands; --op >= 0; )
+ for (op = i.operands; --op >= 0;)
if ((i.types[op] & Reg)
&& !(i.tm.operand_types[op] & InOutPortReg))
{
else if (i.suffix == BYTE_MNEM_SUFFIX)
{
int op;
- for (op = i.operands; --op >= 0; )
+ for (op = i.operands; --op >= 0;)
{
/* If this is an eight bit register, it's OK. If it's
the 16 or 32 bit version of an eight bit register,
- we will just use the low portion, and that's OK too. */
+ we will just use the low portion, and that's OK too. */
if (i.types[op] & Reg8)
continue;
- /* movzx and movsx should not generate this warning. */
+ /* movzx and movsx should not generate this warning. */
if (intel_syntax
&& (i.tm.base_opcode == 0xfb7
|| i.tm.base_opcode == 0xfb6
)
{
#if REGISTER_WARNINGS
- if ((i.tm.operand_types[op] & InOutPortReg) == 0)
+ if (!quiet_warnings
+ && (i.tm.operand_types[op] & InOutPortReg) == 0)
as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
(i.op[op].regs - (i.types[op] & Reg16 ? 8 : 16))->reg_name,
i.op[op].regs->reg_name,
#endif
continue;
}
- /* Any other register is bad */
+ /* Any other register is bad. */
if (i.types[op] & (Reg | RegMMX | RegXMM
| SReg2 | SReg3
| Control | Debug | Test
else if (i.suffix == LONG_MNEM_SUFFIX)
{
int op;
- for (op = i.operands; --op >= 0; )
+
+ for (op = i.operands; --op >= 0;)
/* Reject eight bit registers, except where the template
requires them. (eg. movzb) */
if ((i.types[op] & Reg8) != 0
- && (i.tm.operand_types[op] & (Reg16|Reg32|Acc)) != 0)
+ && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
{
as_bad (_("`%%%s' not allowed with `%s%c'"),
i.op[op].regs->reg_name,
}
#if REGISTER_WARNINGS
/* Warn if the e prefix on a general reg is missing. */
- else if ((i.types[op] & Reg16) != 0
+ else if (!quiet_warnings
+ && (i.types[op] & Reg16) != 0
&& (i.tm.operand_types[op] & (Reg32|Acc)) != 0)
{
as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
else if (i.suffix == WORD_MNEM_SUFFIX)
{
int op;
- for (op = i.operands; --op >= 0; )
+ for (op = i.operands; --op >= 0;)
/* Reject eight bit registers, except where the template
requires them. (eg. movzb) */
if ((i.types[op] & Reg8) != 0
}
#if REGISTER_WARNINGS
/* Warn if the e prefix on a general reg is present. */
- else if ((i.types[op] & Reg32) != 0
+ else if (!quiet_warnings
+ && (i.types[op] & Reg32) != 0
&& (i.tm.operand_types[op] & (Reg16|Acc)) != 0)
{
as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
}
#endif
}
+ else if (intel_syntax && (i.tm.opcode_modifier & IgnoreSize))
+ /* Do nothing if the instruction is going to ignore the prefix. */
+ ;
else
- abort();
+ abort ();
}
else if ((i.tm.opcode_modifier & DefaultSize) && !i.suffix)
{
if (overlap0 & ImplicitRegister)
i.reg_operands--;
if (overlap0 & Imm1)
- i.imm_operands = 0; /* kludge for shift insns */
+ i.imm_operands = 0; /* kludge for shift insns. */
i.types[1] = overlap1;
if (overlap1 & ImplicitRegister)
return;
}
- /* For movzx and movsx, need to check the register type */
+ /* For movzx and movsx, need to check the register type. */
if (intel_syntax
&& (i.tm.base_opcode == 0xfb6 || i.tm.base_opcode == 0xfbe))
if (i.suffix && i.suffix == BYTE_MNEM_SUFFIX)
expressionS *exp;
- assert(i.imm_operands == 0 && i.operands <= 2 && 2 < MAX_OPERANDS);
+ assert (i.imm_operands == 0 && i.operands <= 2 && 2 < MAX_OPERANDS);
exp = &im_expressions[i.imm_operands++];
i.op[i.operands].imms = exp;
i.tm.extension_opcode = None;
}
- /* For insns with operands there are more diddles to do to the opcode. */
+ /* For insns with operands there are more diddles to do to the opcode. */
if (i.operands)
{
/* Default segment register this instruction will use
if (i.tm.opcode_modifier & regKludge)
{
unsigned int first_reg_op = (i.types[0] & Reg) ? 0 : 1;
- /* Pretend we saw the extra register operand. */
- assert (i.op[first_reg_op+1].regs == 0);
- i.op[first_reg_op+1].regs = i.op[first_reg_op].regs;
- i.types[first_reg_op+1] = i.types[first_reg_op];
+ /* Pretend we saw the extra register operand. */
+ assert (i.op[first_reg_op + 1].regs == 0);
+ i.op[first_reg_op + 1].regs = i.op[first_reg_op].regs;
+ i.types[first_reg_op + 1] = i.types[first_reg_op];
i.reg_operands = 2;
}
if (i.tm.opcode_modifier & ShortForm)
{
- /* The register or float register operand is in operand 0 or 1. */
+ /* The register or float register operand is in operand 0 or 1. */
unsigned int op = (i.types[0] & (Reg | FloatReg)) ? 0 : 1;
- /* Register goes in low 3 bits of opcode. */
+ /* Register goes in low 3 bits of opcode. */
i.tm.base_opcode |= i.op[op].regs->reg_num;
- if ((i.tm.opcode_modifier & Ugh) != 0)
+ if (!quiet_warnings && (i.tm.opcode_modifier & Ugh) != 0)
{
/* Warn about some common errors, but press on regardless.
The first case can be generated by gcc (<= 2.8.1). */
if (i.operands == 2)
{
- /* reversed arguments on faddp, fsubp, etc. */
+ /* Reversed arguments on faddp, fsubp, etc. */
as_warn (_("translating to `%s %%%s,%%%s'"), i.tm.name,
i.op[1].regs->reg_name,
i.op[0].regs->reg_name);
}
else
{
- /* extraneous `l' suffix on fp insn */
+ /* Extraneous `l' suffix on fp insn. */
as_warn (_("translating to `%s %%%s'"), i.tm.name,
i.op[0].regs->reg_name);
}
/* The opcode is completed (modulo i.tm.extension_opcode which
must be put into the modrm byte).
Now, we make the modrm & index base bytes based on all the
- info we've collected. */
+ info we've collected. */
/* i.reg_operands MUST be the number of real register operands;
- implicit registers do not count. */
+ implicit registers do not count. */
if (i.reg_operands == 2)
{
unsigned int source, dest;
}
}
else
- { /* if it's not 2 reg operands... */
+ { /* If it's not 2 reg operands... */
if (i.mem_operands)
{
unsigned int fake_zero_displacement = 0;
fake_zero_displacement = 1;
if (! i.index_reg)
{
- /* Operand is just <disp> */
+ /* Operand is just <disp> */
if (flag_16bit_code ^ (i.prefix[ADDR_PREFIX] != 0))
{
i.rm.regmem = NO_BASE_REGISTER_16;
i.types[op] |= Disp32;
}
}
- else /* ! i.base_reg && i.index_reg */
+ else /* ! i.base_reg && i.index_reg */
{
i.sib.index = i.index_reg->reg_num;
i.sib.base = NO_BASE_REGISTER;
i.sib.scale = i.log2_scale_factor;
i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
i.types[op] &= ~Disp;
- i.types[op] |= Disp32; /* Must be 32 bit */
+ i.types[op] |= Disp32; /* Must be 32 bit. */
}
}
else if (i.base_reg->reg_type & Reg16)
{
switch (i.base_reg->reg_num)
{
- case 3: /* (%bx) */
+ case 3: /* (%bx) */
if (! i.index_reg)
i.rm.regmem = 7;
- else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
+ else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
i.rm.regmem = i.index_reg->reg_num - 6;
break;
- case 5: /* (%bp) */
+ case 5: /* (%bp) */
default_seg = &ss;
if (! i.index_reg)
{
i.rm.regmem = 6;
if ((i.types[op] & Disp) == 0)
{
- /* fake (%bp) into 0(%bp) */
+ /* fake (%bp) into 0(%bp) */
i.types[op] |= Disp8;
fake_zero_displacement = 1;
}
}
- else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
+ else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
i.rm.regmem = i.index_reg->reg_num - 6 + 2;
break;
- default: /* (%si) -> 4 or (%di) -> 5 */
+ default: /* (%si) -> 4 or (%di) -> 5 */
i.rm.regmem = i.base_reg->reg_num - 6 + 4;
}
i.rm.mode = mode_from_disp_size (i.types[op]);
}
- else /* i.base_reg and 32 bit mode */
+ else /* i.base_reg and 32 bit mode */
{
i.rm.regmem = i.base_reg->reg_num;
i.sib.base = i.base_reg->reg_num;
if (fake_zero_displacement)
{
/* Fakes a zero displacement assuming that i.types[op]
- holds the correct displacement size. */
+ holds the correct displacement size. */
expressionS *exp;
assert (i.op[op].disps == 0);
operand (if any) based on i.tm.extension_opcode.
Again, we must be careful to make sure that
segment/control/debug/test/MMX registers are coded
- into the i.rm.reg field. */
+ into the i.rm.reg field. */
if (i.reg_operands)
{
unsigned int op =
? 1
: 2));
/* If there is an extension opcode to put here, the
- register number must be put into the regmem field. */
+ register number must be put into the regmem field. */
if (i.tm.extension_opcode != None)
i.rm.regmem = i.op[op].regs->reg_num;
else
i.rm.mode = 3;
}
- /* Fill in i.rm.reg field with extension opcode (if any). */
+ /* Fill in i.rm.reg field with extension opcode (if any). */
if (i.tm.extension_opcode != None)
i.rm.reg = i.tm.extension_opcode;
}
}
else if (i.tm.opcode_modifier & (Seg2ShortForm | Seg3ShortForm))
{
- if (i.tm.base_opcode == POP_SEG_SHORT && i.op[0].regs->reg_num == 1)
+ if (i.tm.base_opcode == POP_SEG_SHORT
+ && i.op[0].regs->reg_num == 1)
{
as_bad (_("you can't `pop %%cs'"));
return;
return;
}
}
- else if ((i.tm.opcode_modifier & Ugh) != 0)
+ else if (!quiet_warnings && (i.tm.opcode_modifier & Ugh) != 0)
{
/* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
as_warn (_("translating to `%sp'"), i.tm.name);
}
}
- /* Handle conversion of 'int $3' --> special int3 insn. */
+ /* Handle conversion of 'int $3' --> special int3 insn. */
if (i.tm.base_opcode == INT_OPCODE && i.op[0].imms->X_add_number == 3)
{
i.tm.base_opcode = INT3_OPCODE;
i.op[0].disps->X_op = O_symbol;
}
- /* We are ready to output the insn. */
+ /* We are ready to output the insn. */
{
register char *p;
- /* Output jumps. */
+ /* Output jumps. */
if (i.tm.opcode_modifier & Jump)
{
int size;
if (prefix)
*p++ = DATA_PREFIX_OPCODE;
*p = i.tm.base_opcode;
- /* 1 possible extra opcode + displacement go in fr_var. */
+ /* 1 possible extra opcode + displacement go in var part.
+ Pass reloc in fr_var. */
frag_var (rs_machine_dependent,
1 + size,
- 1,
+ i.disp_reloc[0],
((unsigned char) *p == JUMP_PC_RELATIVE
? ENCODE_RELAX_STATE (UNCOND_JUMP, SMALL) | code16
: ENCODE_RELAX_STATE (COND_JUMP, SMALL) | code16),
}
else
{
- /* opcode can be at most two bytes */
+ /* Opcode can be at most two bytes. */
insn_size += 2 + size;
p = frag_more (2 + size);
*p++ = (i.tm.base_opcode >> 8) & 0xff;
if (i.prefixes != 0 && !intel_syntax)
as_warn (_("skipping prefixes on this instruction"));
- insn_size += prefix + 1 + 2 + size; /* 1 opcode; 2 segment; offset */
+ /* 1 opcode; 2 segment; offset */
+ insn_size += prefix + 1 + 2 + size;
p = frag_more (prefix + 1 + 2 + size);
if (prefix)
*p++ = DATA_PREFIX_OPCODE;
}
else
{
- /* Output normal instructions here. */
+ /* Output normal instructions here. */
unsigned char *q;
- /* The prefix bytes. */
+ /* The prefix bytes. */
for (q = i.prefix;
q < i.prefix + sizeof (i.prefix) / sizeof (i.prefix[0]);
q++)
}
}
- /* Now the opcode; be careful about word order here! */
+ /* Now the opcode; be careful about word order here! */
if (fits_in_unsigned_byte (i.tm.base_opcode))
{
insn_size += 1;
{
insn_size += 2;
p = frag_more (2);
- /* put out high byte first: can't use md_number_to_chars! */
+ /* Put out high byte first: can't use md_number_to_chars! */
*p++ = (i.tm.base_opcode >> 8) & 0xff;
*p = i.tm.base_opcode & 0xff;
}
else
- { /* opcode is either 3 or 4 bytes */
+ { /* Opcode is either 3 or 4 bytes. */
if (i.tm.base_opcode & 0xff000000)
{
insn_size += 4;
}
}
}
- } /* end displacement output */
+ }
- /* output immediate */
+ /* Output immediate. */
if (i.imm_operands)
{
register unsigned int n;
md_number_to_chars (p, val, size);
}
else
- { /* not absolute_section */
- /* Need a 32-bit fixup (don't support 8bit
+ {
+ /* Not absolute_section.
+ Need a 32-bit fixup (don't support 8bit
non-absolute imms). Try to support other
- sizes ... */
+ sizes ... */
#ifdef BFD_ASSEMBLER
enum bfd_reloc_code_real reloc_type;
#else
}
}
}
- } /* end immediate output */
+ }
}
+ dwarf2_emit_insn (insn_size);
+
#ifdef DEBUG386
if (flag_debug)
{
pi (line, &i);
}
-#endif /* DEBUG386 */
+#endif /* DEBUG386 */
}
}
\f
{
char *save_input_line_pointer;
segT exp_seg = 0;
- expressionS * exp;
+ expressionS *exp;
if (i.imm_operands == MAX_IMMEDIATE_OPERANDS)
{
#ifndef LEX_AT
{
- /*
- * We can have operands of the form
- * <symbol>@GOTOFF+<nnn>
- * Take the easy way out here and copy everything
- * into a temporary buffer...
- */
+ /* We can have operands of the form
+ <symbol>@GOTOFF+<nnn>
+ Take the easy way out here and copy everything
+ into a temporary buffer... */
register char *cp;
cp = strchr (input_line_pointer, '@');
int len = 0;
int first;
- /* GOT relocations are not supported in 16 bit mode */
+ /* GOT relocations are not supported in 16 bit mode. */
if (flag_16bit_code)
as_bad (_("GOT relocations not supported in 16 bit mode"));
/* Replace the relocation token with ' ', so that errors like
foo@GOTOFF1 will be detected. */
first = cp - input_line_pointer;
- tmpbuf = (char *) alloca (strlen(input_line_pointer));
+ tmpbuf = (char *) alloca (strlen (input_line_pointer));
memcpy (tmpbuf, input_line_pointer, first);
tmpbuf[first] = ' ';
strcpy (tmpbuf + first + 1, cp + 1 + len);
if (exp->X_op == O_absent || exp->X_op == O_big)
{
- /* missing or bad expr becomes absolute 0 */
+ /* Missing or bad expr becomes absolute 0. */
as_bad (_("missing or invalid immediate expression `%s' taken as 0"),
imm_start);
exp->X_op = O_constant;
if (exp->X_op == O_constant)
{
- i.types[this_operand] |= Imm32; /* Size it properly later. */
+ /* Size it properly later. */
+ i.types[this_operand] |= Imm32;
}
#if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
- else if (
+ else if (1
#ifdef BFD_ASSEMBLER
- OUTPUT_FLAVOR == bfd_target_aout_flavour &&
+ && OUTPUT_FLAVOR == bfd_target_aout_flavour
#endif
- exp_seg != text_section
+ && exp_seg != text_section
&& exp_seg != data_section
&& exp_seg != bss_section
&& exp_seg != undefined_section
rorl $16,%edx
#NO_APP
- So here we provide the missing zero.
- */
+ So here we provide the missing zero. */
*displacement_string_end = '0';
}
#endif
#ifndef LEX_AT
{
- /*
- * We can have operands of the form
- * <symbol>@GOTOFF+<nnn>
- * Take the easy way out here and copy everything
- * into a temporary buffer...
- */
+ /* We can have operands of the form
+ <symbol>@GOTOFF+<nnn>
+ Take the easy way out here and copy everything
+ into a temporary buffer... */
register char *cp;
cp = strchr (input_line_pointer, '@');
int len = 0;
int first;
- /* GOT relocations are not supported in 16 bit mode */
+ /* GOT relocations are not supported in 16 bit mode. */
if (flag_16bit_code)
as_bad (_("GOT relocations not supported in 16 bit mode"));
/* Replace the relocation token with ' ', so that errors like
foo@GOTOFF1 will be detected. */
first = cp - input_line_pointer;
- tmpbuf = (char *) alloca (strlen(input_line_pointer));
+ tmpbuf = (char *) alloca (strlen (input_line_pointer));
memcpy (tmpbuf, input_line_pointer, first);
tmpbuf[first] = ' ';
strcpy (tmpbuf + first + 1, cp + 1 + len);
#ifdef BFD_ASSEMBLER
/* We do this to make sure that the section symbol is in
the symbol table. We will ultimately change the relocation
- to be relative to the beginning of the section */
+ to be relative to the beginning of the section. */
if (i.disp_reloc[this_operand] == BFD_RELOC_386_GOTOFF)
{
if (S_IS_LOCAL(exp->X_add_symbol)
if (exp->X_op == O_absent || exp->X_op == O_big)
{
- /* missing or bad expr becomes absolute 0 */
+ /* Missing or bad expr becomes absolute 0. */
as_bad (_("missing or invalid displacement expression `%s' taken as 0"),
disp_start);
exp->X_op = O_constant;
exp->X_op_symbol = (symbolS *) 0;
}
- if (exp->X_op == O_constant)
- {
- if (i.types[this_operand] & Disp16)
- {
- /* We know this operand is at most 16 bits, so convert to a
- signed 16 bit number before trying to see whether it will
- fit in an even smaller size. */
- exp->X_add_number =
- (((exp->X_add_number & 0xffff) ^ 0x8000) - 0x8000);
- }
- if (fits_in_signed_byte (exp->X_add_number))
- i.types[this_operand] |= Disp8;
- }
#if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
- else if (
+ if (exp->X_op != O_constant
#ifdef BFD_ASSEMBLER
- OUTPUT_FLAVOR == bfd_target_aout_flavour &&
+ && OUTPUT_FLAVOR == bfd_target_aout_flavour
#endif
- exp_seg != text_section
- && exp_seg != data_section
- && exp_seg != bss_section
- && exp_seg != undefined_section)
+ && exp_seg != text_section
+ && exp_seg != data_section
+ && exp_seg != bss_section
+ && exp_seg != undefined_section)
{
#ifdef BFD_ASSEMBLER
as_bad (_("unimplemented segment %s in operand"), exp_seg->name);
return 1;
}
-static int i386_operand_modifier PARAMS ((char **, int));
-
-static int
-i386_operand_modifier (op_string, got_a_float)
- char **op_string;
- int got_a_float;
-{
- if (!strncasecmp (*op_string, "BYTE PTR", 8))
- {
- i.suffix = BYTE_MNEM_SUFFIX;
- *op_string += 8;
- return BYTE_PTR;
-
- }
- else if (!strncasecmp (*op_string, "WORD PTR", 8))
- {
- if (got_a_float == 2) /* "fi..." */
- i.suffix = SHORT_MNEM_SUFFIX;
- else
- i.suffix = WORD_MNEM_SUFFIX;
- *op_string += 8;
- return WORD_PTR;
- }
-
- else if (!strncasecmp (*op_string, "DWORD PTR", 9))
- {
- if (got_a_float == 1) /* "f..." */
- i.suffix = SHORT_MNEM_SUFFIX;
- else
- i.suffix = LONG_MNEM_SUFFIX;
- *op_string += 9;
- return DWORD_PTR;
- }
-
- else if (!strncasecmp (*op_string, "QWORD PTR", 9))
- {
- i.suffix = DWORD_MNEM_SUFFIX;
- *op_string += 9;
- return QWORD_PTR;
- }
-
- else if (!strncasecmp (*op_string, "XWORD PTR", 9))
- {
- i.suffix = LONG_DOUBLE_MNEM_SUFFIX;
- *op_string += 9;
- return XWORD_PTR;
- }
-
- else if (!strncasecmp (*op_string, "SHORT", 5))
- {
- *op_string += 5;
- return SHORT;
- }
-
- else if (!strncasecmp (*op_string, "OFFSET FLAT:", 12))
- {
- *op_string += 12;
- return OFFSET_FLAT;
- }
-
- else if (!strncasecmp (*op_string, "FLAT", 4))
- {
- *op_string += 4;
- return FLAT;
- }
-
- else return NONE_FOUND;
-}
-
-static char * build_displacement_string PARAMS ((int, char *));
-
-static char *
-build_displacement_string (initial_disp, op_string)
- int initial_disp;
- char *op_string;
-{
- char *temp_string = (char *) malloc (strlen (op_string) + 1);
- char *end_of_operand_string;
- char *tc;
- char *temp_disp;
-
- temp_string[0] = '\0';
- tc = end_of_operand_string = strchr (op_string, '[');
- if (initial_disp && !end_of_operand_string)
- {
- strcpy (temp_string, op_string);
- return temp_string;
- }
-
- /* Build the whole displacement string */
- if (initial_disp)
- {
- strncpy (temp_string, op_string, end_of_operand_string - op_string);
- temp_string[end_of_operand_string - op_string] = '\0';
- temp_disp = tc;
- }
- else
- temp_disp = op_string;
-
- while (*temp_disp != '\0')
- {
- char *end_op;
- int add_minus = (*temp_disp == '-');
-
- if (*temp_disp == '+' || *temp_disp == '-' || *temp_disp == '[')
- temp_disp++;
-
- if (is_space_char (*temp_disp))
- temp_disp++;
-
- /* Don't consider registers */
- if ( !((*temp_disp == REGISTER_PREFIX || allow_naked_reg)
- && parse_register (temp_disp, &end_op)) )
- {
- char *string_start = temp_disp;
-
- while (*temp_disp != ']'
- && *temp_disp != '+'
- && *temp_disp != '-'
- && *temp_disp != '*')
- ++temp_disp;
-
- if (add_minus)
- strcat (temp_string, "-");
- else
- strcat (temp_string, "+");
-
- strncat (temp_string, string_start, temp_disp - string_start);
- if (*temp_disp == '+' || *temp_disp == '-')
- --temp_disp;
- }
-
- while (*temp_disp != '\0'
- && *temp_disp != '+'
- && *temp_disp != '-')
- ++temp_disp;
- }
-
- return temp_string;
-}
-
-static int i386_parse_seg PARAMS ((char *));
-
-static int
-i386_parse_seg (op_string)
- char *op_string;
-{
- if (is_space_char (*op_string))
- ++op_string;
-
- /* Should be one of es, cs, ss, ds fs or gs */
- switch (*op_string++)
- {
- case 'e':
- i.seg[i.mem_operands] = &es;
- break;
- case 'c':
- i.seg[i.mem_operands] = &cs;
- break;
- case 's':
- i.seg[i.mem_operands] = &ss;
- break;
- case 'd':
- i.seg[i.mem_operands] = &ds;
- break;
- case 'f':
- i.seg[i.mem_operands] = &fs;
- break;
- case 'g':
- i.seg[i.mem_operands] = &gs;
- break;
- default:
- as_bad (_("bad segment name `%s'"), op_string);
- return 0;
- }
-
- if (*op_string++ != 's')
- {
- as_bad (_("bad segment name `%s'"), op_string);
- return 0;
- }
-
- if (is_space_char (*op_string))
- ++op_string;
-
- if (*op_string != ':')
- {
- as_bad (_("bad segment name `%s'"), op_string);
- return 0;
- }
-
- return 1;
-
-}
-
static int i386_index_check PARAMS((const char *));
/* Make sure the memory operand we've been dealt is valid.
- Returns 1 on success, 0 on a failure.
-*/
+ Return 1 on success, 0 on a failure. */
+
static int
i386_index_check (operand_string)
const char *operand_string;
tryprefix:
#endif
if (flag_16bit_code ^ (i.prefix[ADDR_PREFIX] != 0)
- /* 16 bit mode checks */
+ /* 16 bit mode checks. */
? ((i.base_reg
&& ((i.base_reg->reg_type & (Reg16|BaseIndex))
!= (Reg16|BaseIndex)))
&& i.base_reg->reg_num < 6
&& i.index_reg->reg_num >= 6
&& i.log2_scale_factor == 0))))
- /* 32 bit mode checks */
+ /* 32 bit mode checks. */
: ((i.base_reg
&& (i.base_reg->reg_type & Reg32) == 0)
|| (i.index_reg
Disp16 or Disp32 is set.
FIXME. There doesn't seem to be any real need for separate
Disp16 and Disp32 flags. The same goes for Imm16 and Imm32.
- Removing them would probably clean up the code quite a lot.
- */
+ Removing them would probably clean up the code quite a lot. */
if (i.types[this_operand] & (Disp16|Disp32))
i.types[this_operand] ^= (Disp16|Disp32);
fudged = 1;
return 1;
}
-static int i386_intel_memory_operand PARAMS ((char *));
+/* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
+ on error. */
static int
-i386_intel_memory_operand (operand_string)
+i386_operand (operand_string)
char *operand_string;
{
+ const reg_entry *r;
+ char *end_op;
char *op_string = operand_string;
- char *end_of_operand_string;
-
- if ((i.mem_operands == 1
- && (current_templates->start->opcode_modifier & IsString) == 0)
- || i.mem_operands == 2)
- {
- as_bad (_("too many memory references for `%s'"),
- current_templates->start->name);
- return 0;
- }
-
- /* First check for a segment override. */
- if (*op_string != '[')
- {
- char *end_seg;
- end_seg = strchr (op_string, ':');
- if (end_seg)
- {
- if (!i386_parse_seg (op_string))
- return 0;
- op_string = end_seg + 1;
- }
- }
+ if (is_space_char (*op_string))
+ ++op_string;
- /* Look for displacement preceding open bracket */
- if (*op_string != '[')
+ /* We check for an absolute prefix (differentiating,
+ for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
+ if (*op_string == ABSOLUTE_PREFIX)
{
- char *temp_string;
-
- if (i.disp_operands)
- return 0;
-
- temp_string = build_displacement_string (true, op_string);
-
- if (!i386_displacement (temp_string, temp_string + strlen (temp_string)))
- {
- free (temp_string);
- return 0;
- }
- free (temp_string);
-
- end_of_operand_string = strchr (op_string, '[');
- if (!end_of_operand_string)
- end_of_operand_string = op_string + strlen (op_string);
-
- if (is_space_char (*end_of_operand_string))
- --end_of_operand_string;
-
- op_string = end_of_operand_string;
+ ++op_string;
+ if (is_space_char (*op_string))
+ ++op_string;
+ i.types[this_operand] |= JumpAbsolute;
}
- if (*op_string == '[')
+ /* Check if operand is a register. */
+ if ((*op_string == REGISTER_PREFIX || allow_naked_reg)
+ && (r = parse_register (op_string, &end_op)) != NULL)
{
- ++op_string;
-
- /* Pick off each component and figure out where it belongs */
-
- end_of_operand_string = op_string;
-
- while (*op_string != ']')
+ /* Check for a segment override by searching for ':' after a
+ segment register. */
+ op_string = end_op;
+ if (is_space_char (*op_string))
+ ++op_string;
+ if (*op_string == ':' && (r->reg_type & (SReg2 | SReg3)))
{
- const reg_entry *temp_reg;
- char *end_op;
- char *temp_string;
-
- while (*end_of_operand_string != '+'
- && *end_of_operand_string != '-'
- && *end_of_operand_string != '*'
- && *end_of_operand_string != ']')
- end_of_operand_string++;
-
- temp_string = op_string;
- if (*temp_string == '+')
+ switch (r->reg_num)
{
- ++temp_string;
- if (is_space_char (*temp_string))
- ++temp_string;
+ case 0:
+ i.seg[i.mem_operands] = &es;
+ break;
+ case 1:
+ i.seg[i.mem_operands] = &cs;
+ break;
+ case 2:
+ i.seg[i.mem_operands] = &ss;
+ break;
+ case 3:
+ i.seg[i.mem_operands] = &ds;
+ break;
+ case 4:
+ i.seg[i.mem_operands] = &fs;
+ break;
+ case 5:
+ i.seg[i.mem_operands] = &gs;
+ break;
}
- if ((*temp_string == REGISTER_PREFIX || allow_naked_reg)
- && (temp_reg = parse_register (temp_string, &end_op)) != NULL)
- {
- if (i.base_reg == NULL)
- i.base_reg = temp_reg;
- else
- i.index_reg = temp_reg;
+ /* Skip the ':' and whitespace. */
+ ++op_string;
+ if (is_space_char (*op_string))
+ ++op_string;
- i.types[this_operand] |= BaseIndex;
- }
- else if (*temp_string == REGISTER_PREFIX)
+ if (!is_digit_char (*op_string)
+ && !is_identifier_char (*op_string)
+ && *op_string != '('
+ && *op_string != ABSOLUTE_PREFIX)
{
- as_bad (_("bad register name `%s'"), temp_string);
+ as_bad (_("bad memory operand `%s'"), op_string);
return 0;
}
- else if (is_digit_char (*op_string)
- || *op_string == '+' || *op_string == '-')
- {
- char *temp_str;
-
- if (i.disp_operands != 0)
- return 0;
-
- temp_string = build_displacement_string (false, op_string);
-
- temp_str = temp_string;
- if (*temp_str == '+')
- ++temp_str;
-
- if (!i386_displacement (temp_str, temp_str + strlen (temp_str)))
- {
- free (temp_string);
- return 0;
- }
- free (temp_string);
-
- ++op_string;
- end_of_operand_string = op_string;
- while (*end_of_operand_string != ']'
- && *end_of_operand_string != '+'
- && *end_of_operand_string != '-'
- && *end_of_operand_string != '*')
- ++end_of_operand_string;
- }
- else if (*op_string == '*')
+ /* Handle case of %es:*foo. */
+ if (*op_string == ABSOLUTE_PREFIX)
{
++op_string;
-
- if (i.base_reg && !i.index_reg)
- {
- i.index_reg = i.base_reg;
- i.base_reg = 0;
- }
-
- if (!i386_scale (op_string))
- return 0;
+ if (is_space_char (*op_string))
+ ++op_string;
+ i.types[this_operand] |= JumpAbsolute;
}
- op_string = end_of_operand_string;
- ++end_of_operand_string;
- }
- }
-
- if (i386_index_check (operand_string) == 0)
- return 0;
-
- i.mem_operands++;
- return 1;
-}
-
-static int
-i386_intel_operand (operand_string, got_a_float)
- char *operand_string;
- int got_a_float;
-{
- const reg_entry * r;
- char *end_op;
- char *op_string = operand_string;
-
- int operand_modifier = i386_operand_modifier (&op_string, got_a_float);
- if (is_space_char (*op_string))
- ++op_string;
-
- switch (operand_modifier)
- {
- case BYTE_PTR:
- case WORD_PTR:
- case DWORD_PTR:
- case QWORD_PTR:
- case XWORD_PTR:
- if (!i386_intel_memory_operand (op_string))
- return 0;
- break;
-
- case FLAT:
- case OFFSET_FLAT:
- if (!i386_immediate (op_string))
- return 0;
- break;
-
- case SHORT:
- case NONE_FOUND:
- /* Should be register or immediate */
- if (is_digit_char (*op_string)
- && strchr (op_string, '[') == 0)
- {
- if (!i386_immediate (op_string))
- return 0;
- }
- else if ((*op_string == REGISTER_PREFIX || allow_naked_reg)
- && (r = parse_register (op_string, &end_op)) != NULL)
- {
- /* Check for a segment override by searching for ':' after a
- segment register. */
- op_string = end_op;
- if (is_space_char (*op_string))
- ++op_string;
- if (*op_string == ':' && (r->reg_type & (SReg2 | SReg3)))
- {
- switch (r->reg_num)
- {
- case 0:
- i.seg[i.mem_operands] = &es;
- break;
- case 1:
- i.seg[i.mem_operands] = &cs;
- break;
- case 2:
- i.seg[i.mem_operands] = &ss;
- break;
- case 3:
- i.seg[i.mem_operands] = &ds;
- break;
- case 4:
- i.seg[i.mem_operands] = &fs;
- break;
- case 5:
- i.seg[i.mem_operands] = &gs;
- break;
- }
-
- }
- i.types[this_operand] |= r->reg_type & ~BaseIndex;
- i.op[this_operand].regs = r;
- i.reg_operands++;
- }
- else if (*op_string == REGISTER_PREFIX)
- {
- as_bad (_("bad register name `%s'"), op_string);
- return 0;
- }
- else if (!i386_intel_memory_operand (op_string))
- return 0;
-
- break;
- } /* end switch */
-
- return 1;
-}
-
-/* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
- on error. */
-
-static int
-i386_operand (operand_string)
- char *operand_string;
-{
- const reg_entry *r;
- char *end_op;
- char *op_string = operand_string;
-
- if (is_space_char (*op_string))
- ++op_string;
-
- /* We check for an absolute prefix (differentiating,
- for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
- if (*op_string == ABSOLUTE_PREFIX)
- {
- ++op_string;
- if (is_space_char (*op_string))
- ++op_string;
- i.types[this_operand] |= JumpAbsolute;
- }
-
- /* Check if operand is a register. */
- if ((*op_string == REGISTER_PREFIX || allow_naked_reg)
- && (r = parse_register (op_string, &end_op)) != NULL)
- {
- /* Check for a segment override by searching for ':' after a
- segment register. */
- op_string = end_op;
- if (is_space_char (*op_string))
- ++op_string;
- if (*op_string == ':' && (r->reg_type & (SReg2 | SReg3)))
- {
- switch (r->reg_num)
- {
- case 0:
- i.seg[i.mem_operands] = &es;
- break;
- case 1:
- i.seg[i.mem_operands] = &cs;
- break;
- case 2:
- i.seg[i.mem_operands] = &ss;
- break;
- case 3:
- i.seg[i.mem_operands] = &ds;
- break;
- case 4:
- i.seg[i.mem_operands] = &fs;
- break;
- case 5:
- i.seg[i.mem_operands] = &gs;
- break;
- }
-
- /* Skip the ':' and whitespace. */
- ++op_string;
- if (is_space_char (*op_string))
- ++op_string;
-
- if (!is_digit_char (*op_string)
- && !is_identifier_char (*op_string)
- && *op_string != '('
- && *op_string != ABSOLUTE_PREFIX)
- {
- as_bad (_("bad memory operand `%s'"), op_string);
- return 0;
- }
- /* Handle case of %es:*foo. */
- if (*op_string == ABSOLUTE_PREFIX)
- {
- ++op_string;
- if (is_space_char (*op_string))
- ++op_string;
- i.types[this_operand] |= JumpAbsolute;
- }
- goto do_memory_reference;
+ goto do_memory_reference;
}
if (*op_string)
{
return 0;
}
else if (*op_string == IMMEDIATE_PREFIX)
- { /* ... or an immediate */
+ {
++op_string;
if (i.types[this_operand] & JumpAbsolute)
{
|| is_identifier_char (*op_string)
|| *op_string == '(' )
{
- /* This is a memory reference of some sort. */
+ /* This is a memory reference of some sort. */
char *base_string;
- /* Start and end of displacement string expression (if found). */
+ /* Start and end of displacement string expression (if found). */
char *displacement_string_start;
char *displacement_string_end;
if (is_space_char (*base_string))
--base_string;
- /* If we only have a displacement, set-up for it to be parsed later. */
+ /* If we only have a displacement, set-up for it to be parsed later. */
displacement_string_start = op_string;
displacement_string_end = base_string + 1;
char *temp_string;
unsigned int parens_balanced = 1;
/* We've already checked that the number of left & right ()'s are
- equal, so this loop will not be infinite. */
+ equal, so this loop will not be infinite. */
do
{
base_string--;
return 0;
}
- /* Check for scale factor. */
+ /* Check for scale factor. */
if (isdigit ((unsigned char) *base_string))
{
if (!i386_scale (base_string))
i.mem_operands++;
}
else
- { /* it's not a memory operand; argh! */
+ {
+ /* It's not a memory operand; argh! */
as_bad (_("invalid char %s beginning operand %d `%s'"),
output_invalid (*op_string),
this_operand + 1,
op_string);
return 0;
}
- return 1; /* normal return */
+ return 1; /* Normal return. */
}
\f
-/*
- * md_estimate_size_before_relax()
- *
- * Called just before relax().
- * Any symbol that is now undefined will not become defined.
- * Return the correct fr_subtype in the frag.
- * Return the initial "guess for fr_var" to caller.
- * The guess for fr_var is ACTUALLY the growth beyond fr_fix.
- * Whatever we do to grow fr_fix or fr_var contributes to our returned value.
- * Although it may not be explicit in the frag, pretend fr_var starts with a
- * 0 value.
- */
+/* md_estimate_size_before_relax()
+
+ Called just before relax() for rs_machine_dependent frags. The x86
+ assembler uses these frags to handle variable size jump
+ instructions.
+
+ Any symbol that is now undefined will not become defined.
+ Return the correct fr_subtype in the frag.
+ Return the initial "guess for variable size of frag" to caller.
+ The guess is actually the growth beyond the fixed part. Whatever
+ we do to grow the fixed or variable part contributes to our
+ returned value. */
+
int
md_estimate_size_before_relax (fragP, segment)
register fragS *fragP;
register segT segment;
{
- register unsigned char *opcode;
- register int old_fr_fix;
-
- old_fr_fix = fragP->fr_fix;
- opcode = (unsigned char *) fragP->fr_opcode;
/* We've already got fragP->fr_subtype right; all we have to do is
- check for un-relaxable symbols. */
- if (S_GET_SEGMENT (fragP->fr_symbol) != segment)
+ check for un-relaxable symbols. On an ELF system, we can't relax
+ an externally visible symbol, because it may be overridden by a
+ shared library. */
+ if (S_GET_SEGMENT (fragP->fr_symbol) != segment
+#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
+ || S_IS_EXTERNAL (fragP->fr_symbol)
+ || S_IS_WEAK (fragP->fr_symbol)
+#endif
+ )
{
- /* symbol is undefined in this segment */
- int code16 = fragP->fr_subtype & CODE16;
- int size = code16 ? 2 : 4;
+ /* Symbol is undefined in this segment, or we need to keep a
+ reloc so that weak symbols can be overridden. */
+ int size = (fragP->fr_subtype & CODE16) ? 2 : 4;
#ifdef BFD_ASSEMBLER
enum bfd_reloc_code_real reloc_type;
#else
int reloc_type;
#endif
+ unsigned char *opcode;
+ int old_fr_fix;
- if (GOT_symbol /* Not quite right - we should switch on presence of
- @PLT, but I cannot see how to get to that from
- here. We should have done this in md_assemble to
- really get it right all of the time, but I think it
- does not matter that much, as this will be right
- most of the time. ERY */
- && S_GET_SEGMENT(fragP->fr_symbol) == undefined_section)
- reloc_type = BFD_RELOC_386_PLT32;
- else if (code16)
+ if (fragP->fr_var != NO_RELOC)
+ reloc_type = fragP->fr_var;
+ else if (size == 2)
reloc_type = BFD_RELOC_16_PCREL;
else
reloc_type = BFD_RELOC_32_PCREL;
+ old_fr_fix = fragP->fr_fix;
+ opcode = (unsigned char *) fragP->fr_opcode;
+
switch (opcode[0])
{
- case JUMP_PC_RELATIVE: /* make jmp (0xeb) a dword displacement jump */
- opcode[0] = 0xe9; /* dword disp jmp */
+ case JUMP_PC_RELATIVE:
+ /* Make jmp (0xeb) a dword displacement jump. */
+ opcode[0] = 0xe9;
fragP->fr_fix += size;
fix_new (fragP, old_fr_fix, size,
fragP->fr_symbol,
to the dword-displacement jump 0x0f,0x8N. */
opcode[1] = opcode[0] + 0x10;
opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
- fragP->fr_fix += 1 + size; /* we've added an opcode byte */
+ /* We've added an opcode byte. */
+ fragP->fr_fix += 1 + size;
fix_new (fragP, old_fr_fix + 1, size,
fragP->fr_symbol,
fragP->fr_offset, 1,
break;
}
frag_wane (fragP);
+ return fragP->fr_fix - old_fr_fix;
}
- return (fragP->fr_var + fragP->fr_fix - old_fr_fix);
-} /* md_estimate_size_before_relax() */
-\f
-/*
- * md_convert_frag();
- *
- * Called after relax() is finished.
- * In: Address of frag.
- * fr_type == rs_machine_dependent.
- * fr_subtype is what the address relaxed to.
- *
- * Out: Any fixSs and constants are set up.
- * Caller will turn frag into a ".space 0".
- */
+ /* Guess a short jump. */
+ return 1;
+}
+
+/* Called after relax() is finished.
+
+ In: Address of frag.
+ fr_type == rs_machine_dependent.
+ fr_subtype is what the address relaxed to.
+
+ Out: Any fixSs and constants are set up.
+ Caller will turn frag into a ".space 0". */
+
#ifndef BFD_ASSEMBLER
void
md_convert_frag (headers, sec, fragP)
opcode = (unsigned char *) fragP->fr_opcode;
- /* Address we want to reach in file space. */
+ /* Address we want to reach in file space. */
target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset;
-#ifdef BFD_ASSEMBLER /* not needed otherwise? */
+#ifdef BFD_ASSEMBLER
+ /* Not needed otherwise? */
target_address += symbol_get_frag (fragP->fr_symbol)->fr_address;
#endif
- /* Address opcode resides at in file space. */
+ /* Address opcode resides at in file space. */
opcode_address = fragP->fr_address + fragP->fr_fix;
- /* Displacement from opcode start to fill into instruction. */
+ /* Displacement from opcode start to fill into instruction. */
displacement_from_opcode_start = target_address - opcode_address;
switch (fragP->fr_subtype)
case ENCODE_RELAX_STATE (COND_JUMP, SMALL16):
case ENCODE_RELAX_STATE (UNCOND_JUMP, SMALL):
case ENCODE_RELAX_STATE (UNCOND_JUMP, SMALL16):
- /* don't have to change opcode */
- extension = 1; /* 1 opcode + 1 displacement */
+ /* Don't have to change opcode. */
+ extension = 1; /* 1 opcode + 1 displacement */
where_to_put_displacement = &opcode[1];
break;
case ENCODE_RELAX_STATE (COND_JUMP, BIG):
- extension = 5; /* 2 opcode + 4 displacement */
+ extension = 5; /* 2 opcode + 4 displacement */
opcode[1] = opcode[0] + 0x10;
opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
where_to_put_displacement = &opcode[2];
break;
case ENCODE_RELAX_STATE (UNCOND_JUMP, BIG):
- extension = 4; /* 1 opcode + 4 displacement */
+ extension = 4; /* 1 opcode + 4 displacement */
opcode[0] = 0xe9;
where_to_put_displacement = &opcode[1];
break;
case ENCODE_RELAX_STATE (COND_JUMP, BIG16):
- extension = 3; /* 2 opcode + 2 displacement */
+ extension = 3; /* 2 opcode + 2 displacement */
opcode[1] = opcode[0] + 0x10;
opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
where_to_put_displacement = &opcode[2];
break;
case ENCODE_RELAX_STATE (UNCOND_JUMP, BIG16):
- extension = 2; /* 1 opcode + 2 displacement */
+ extension = 2; /* 1 opcode + 2 displacement */
opcode[0] = 0xe9;
where_to_put_displacement = &opcode[1];
break;
BAD_CASE (fragP->fr_subtype);
break;
}
- /* now put displacement after opcode */
+ /* Now put displacement after opcode. */
md_number_to_chars ((char *) where_to_put_displacement,
(valueT) (displacement_from_opcode_start - extension),
SIZE_FROM_RELAX_STATE (fragP->fr_subtype));
fragP->fr_fix += extension;
}
\f
+/* Size of byte displacement jmp. */
+int md_short_jump_size = 2;
+
+/* Size of dword displacement jmp. */
+int md_long_jump_size = 5;
-int md_short_jump_size = 2; /* size of byte displacement jmp */
-int md_long_jump_size = 5; /* size of dword displacement jmp */
-const int md_reloc_size = 8; /* Size of relocation record */
+/* Size of relocation record. */
+const int md_reloc_size = 8;
void
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
offsetT offset;
offset = to_addr - (from_addr + 2);
- md_number_to_chars (ptr, (valueT) 0xeb, 1); /* opcode for byte-disp jump */
+ /* Opcode for byte-disp jump. */
+ md_number_to_chars (ptr, (valueT) 0xeb, 1);
md_number_to_chars (ptr + 1, (valueT) offset, 1);
}
md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
char *ptr;
addressT from_addr, to_addr;
- fragS *frag;
- symbolS *to_symbol;
+ fragS *frag ATTRIBUTE_UNUSED;
+ symbolS *to_symbol ATTRIBUTE_UNUSED;
{
offsetT offset;
- if (flag_do_long_jump)
- {
- offset = to_addr - S_GET_VALUE (to_symbol);
- md_number_to_chars (ptr, (valueT) 0xe9, 1);/* opcode for long jmp */
- md_number_to_chars (ptr + 1, (valueT) offset, 4);
- fix_new (frag, (ptr + 1) - frag->fr_literal, 4,
- to_symbol, (offsetT) 0, 0, BFD_RELOC_32);
- }
- else
- {
- offset = to_addr - (from_addr + 5);
- md_number_to_chars (ptr, (valueT) 0xe9, 1);
- md_number_to_chars (ptr + 1, (valueT) offset, 4);
- }
+ offset = to_addr - (from_addr + 5);
+ md_number_to_chars (ptr, (valueT) 0xe9, 1);
+ md_number_to_chars (ptr + 1, (valueT) offset, 4);
}
\f
/* Apply a fixup (fixS) to segment data, once it has been determined
int
md_apply_fix3 (fixP, valp, seg)
- fixS *fixP; /* The fix we're to put in. */
- valueT *valp; /* Pointer to the value of the bits. */
- segT seg ATTRIBUTE_UNUSED; /* Segment fix is from. */
+ /* The fix we're to put in. */
+ fixS *fixP;
+
+ /* Pointer to the value of the bits. */
+ valueT *valp;
+
+ /* Segment fix is from. */
+ segT seg ATTRIBUTE_UNUSED;
{
register char *p = fixP->fx_where + fixP->fx_frag->fr_literal;
valueT value = *valp;
address offset for a PC relative symbol. */
if (S_GET_SEGMENT (fixP->fx_addsy) != seg)
value += md_pcrel_from (fixP);
- else if (S_IS_EXTERNAL (fixP->fx_addsy)
- || S_IS_WEAK (fixP->fx_addsy))
- {
- /* We are generating an external relocation for this defined
- symbol. We add the address, because
- bfd_install_relocation will subtract it. VALUE already
- holds the symbol value, because fixup_segment added it
- in. We subtract it out, and then we subtract it out
- again because bfd_install_relocation will add it in
- again. */
- value += md_pcrel_from (fixP);
- value -= 2 * S_GET_VALUE (fixP->fx_addsy);
- }
#endif
}
-#ifdef TE_PE
- else if (fixP->fx_addsy != NULL
- && S_IS_DEFINED (fixP->fx_addsy)
- && (S_IS_EXTERNAL (fixP->fx_addsy)
- || S_IS_WEAK (fixP->fx_addsy)))
- {
- /* We are generating an external relocation for this defined
- symbol. VALUE already holds the symbol value, and
- bfd_install_relocation will add it in again. We don't want
- either addition. */
- value -= 2 * S_GET_VALUE (fixP->fx_addsy);
- }
-#endif
/* Fix a few things - the dynamic linker expects certain values here,
- and we must not dissappoint it. */
+ and we must not dissappoint it. */
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
if (OUTPUT_FLAVOR == bfd_target_elf_flavour
&& fixP->fx_addsy)
- switch (fixP->fx_r_type) {
- case BFD_RELOC_386_PLT32:
- /* Make the jump instruction point to the address of the operand. At
- runtime we merely add the offset to the actual PLT entry. */
- value = -4;
- break;
- case BFD_RELOC_386_GOTPC:
-/*
- * This is tough to explain. We end up with this one if we have
+ switch (fixP->fx_r_type)
+ {
+ case BFD_RELOC_386_PLT32:
+ /* Make the jump instruction point to the address of the operand. At
+ runtime we merely add the offset to the actual PLT entry. */
+ value = -4;
+ break;
+ case BFD_RELOC_386_GOTPC:
+
+/* This is tough to explain. We end up with this one if we have
* operands that look like "_GLOBAL_OFFSET_TABLE_+[.-.L284]". The goal
* here is to obtain the absolute address of the GOT, and it is strongly
* preferable from a performance point of view to avoid using a runtime
* explicitly mentioned, and I wonder whether it would simplify matters
* to do it this way. Who knows. In earlier versions of the PIC patches,
* the pcrel_adjust field was used to store the correction, but since the
- * expression is not pcrel, I felt it would be confusing to do it this way.
- */
- value -= 1;
- break;
- case BFD_RELOC_386_GOT32:
- value = 0; /* Fully resolved at runtime. No addend. */
- break;
- case BFD_RELOC_386_GOTOFF:
- break;
-
- case BFD_RELOC_VTABLE_INHERIT:
- case BFD_RELOC_VTABLE_ENTRY:
- fixP->fx_done = 0;
- return 1;
-
- default:
- break;
- }
-#endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
+ * expression is not pcrel, I felt it would be confusing to do it this
+ * way. */
+
+ value -= 1;
+ break;
+ case BFD_RELOC_386_GOT32:
+ value = 0; /* Fully resolved at runtime. No addend. */
+ break;
+ case BFD_RELOC_386_GOTOFF:
+ break;
+
+ case BFD_RELOC_VTABLE_INHERIT:
+ case BFD_RELOC_VTABLE_ENTRY:
+ fixP->fx_done = 0;
+ return 1;
+
+ default:
+ break;
+ }
+#endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
*valp = value;
-#endif /* defined (BFD_ASSEMBLER) && !defined (TE_Mach) */
+#endif /* defined (BFD_ASSEMBLER) && !defined (TE_Mach) */
md_number_to_chars (p, value, fixP->fx_size);
return 1;
}
\f
-
#define MAX_LITTLENUMS 6
-/* Turn the string pointed to by litP into a floating point constant of type
- type, and emit the appropriate bytes. The number of LITTLENUMS emitted
- is stored in *sizeP . An error message is returned, or NULL on OK. */
+/* Turn the string pointed to by litP into a floating point constant
+ of type TYPE, and emit the appropriate bytes. The number of
+ LITTLENUMS emitted is stored in *SIZEP. An error message is
+ returned, or NULL on OK. */
+
char *
md_atof (type, litP, sizeP)
int type;
return output_invalid_buf;
}
-
/* REG_STRING starts *before* REGISTER_PREFIX. */
static const reg_entry *
s++;
}
+ /* For naked regs, make sure that we are not dealing with an identifier.
+ This prevents confusing an identifier like `eax_var' with register
+ `eax'. */
+ if (allow_naked_reg && identifier_chars[(unsigned char) *s])
+ return (const reg_entry *) NULL;
+
*end_op = s;
r = (const reg_entry *) hash_find (reg_hash, reg_name_given);
/* Handle floating point regs, allowing spaces in the (i) part. */
- if (r == i386_regtab /* %st is first entry of table */)
+ if (r == i386_regtab /* %st is first entry of table */)
{
if (is_space_char (*s))
++s;
return r;
}
}
- /* We have "%st(" then garbage */
+ /* We have "%st(" then garbage. */
return (const reg_entry *) NULL;
}
}
}
\f
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
-CONST char *md_shortopts = "kmVQ:sq";
+const char *md_shortopts = "kVQ:sq";
#else
-CONST char *md_shortopts = "m";
+const char *md_shortopts = "q";
#endif
struct option md_longopts[] = {
{NULL, no_argument, NULL, 0}
{
switch (c)
{
- case 'm':
- flag_do_long_jump = 1;
+ case 'q':
+ quiet_warnings = 1;
break;
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
- /* -k: Ignore for FreeBSD compatibility. */
- case 'k':
+ /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
+ should be emitted or not. FIXME: Not implemented. */
+ case 'Q':
break;
/* -V: SVR4 argument to print version ID. */
print_version_id ();
break;
- /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
- should be emitted or not. FIXME: Not implemented. */
- case 'Q':
+ /* -k: Ignore for FreeBSD compatibility. */
+ case 'k':
break;
case 's':
/* -s: On i386 Solaris, this tells the native assembler to use
.stab instead of .stab.excl. We always use .stab anyhow. */
break;
-
- case 'q':
- /* -q: On i386 Solaris, this tells the native assembler to do
- fewer checks. */
- break;
#endif
default:
md_show_usage (stream)
FILE *stream;
{
- fprintf (stream, _("\
- -m do long jump\n"));
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
fprintf (stream, _("\
- -V print assembler version number\n\
- -k ignored\n\
- -Qy, -Qn ignored\n\
- -q ignored\n\
- -s ignored\n"));
+ -Q ignored\n\
+ -V print assembler version number\n\
+ -k ignored\n\
+ -q quieten some warnings\n\
+ -s ignored\n"));
+#else
+ fprintf (stream, _("\
+ -q quieten some warnings\n"));
#endif
}
/* Pick the target format to use. */
-const char *
+const char *
i386_target_format ()
{
switch (OUTPUT_FLAVOR)
{
#ifdef OBJ_MAYBE_AOUT
case bfd_target_aout_flavour:
- return AOUT_TARGET_FORMAT;
+ return AOUT_TARGET_FORMAT;
#endif
#ifdef OBJ_MAYBE_COFF
case bfd_target_coff_flavour:
}
}
-#endif /* OBJ_MAYBE_ more than one */
-#endif /* BFD_ASSEMBLER */
+#endif /* OBJ_MAYBE_ more than one */
+#endif /* BFD_ASSEMBLER */
\f
symbolS *
md_undefined_symbol (name)
}
/* Round up a section size to the appropriate boundary. */
+
valueT
md_section_align (segment, size)
segT segment ATTRIBUTE_UNUSED;
#endif
-
#ifdef BFD_ASSEMBLER
void
return rel;
}
-#else /* ! BFD_ASSEMBLER */
+#else /* ! BFD_ASSEMBLER */
#if (defined(OBJ_AOUT) | defined(OBJ_BOUT))
void
fixS *fixP;
relax_addressT segment_address_in_file;
{
- /*
- * In: length of relocation (or of address) in chars: 1, 2 or 4.
- * Out: GNU LD relocation length code: 0, 1, or 2.
- */
+ /* In: length of relocation (or of address) in chars: 1, 2 or 4.
+ Out: GNU LD relocation length code: 0, 1, or 2. */
- static const unsigned char nbytes_r_length[] = {42, 0, 1, 42, 2};
+ static const unsigned char nbytes_r_length[] = { 42, 0, 1, 42, 2 };
long r_symbolnum;
know (fixP->fx_addsy != NULL);
| (((fixP->fx_pcrel << 0) & 0x01) & 0x0f));
}
-#endif /* OBJ_AOUT or OBJ_BOUT */
+#endif /* OBJ_AOUT or OBJ_BOUT. */
#if defined (I386COFF)
return 0;
}
-#endif /* I386COFF */
+#endif /* I386COFF */
-#endif /* ! BFD_ASSEMBLER */
+#endif /* ! BFD_ASSEMBLER */
\f
-/* end of tc-i386.c */
+/* Parse operands using Intel syntax. This implements a recursive descent
+ parser based on the BNF grammar published in Appendix B of the MASM 6.1
+ Programmer's Guide.
+
+ FIXME: We do not recognize the full operand grammar defined in the MASM
+ documentation. In particular, all the structure/union and
+ high-level macro operands are missing.
+
+ Uppercase words are terminals, lower case words are non-terminals.
+ Objects surrounded by double brackets '[[' ']]' are optional. Vertical
+ bars '|' denote choices. Most grammar productions are implemented in
+ functions called 'intel_<production>'.
+
+ Initial production is 'expr'.
+
+ addOp + | -
+
+ alpha [a-zA-Z]
+
+ byteRegister AL | AH | BL | BH | CL | CH | DL | DH
+
+ constant digits [[ radixOverride ]]
+
+ dataType BYTE | WORD | DWORD | QWORD | XWORD
+
+ digits decdigit
+ | digits decdigit
+ | digits hexdigit
+
+ decdigit [0-9]
+
+ e05 e05 addOp e06
+ | e06
+
+ e06 e06 mulOp e09
+ | e09
+
+ e09 OFFSET e10
+ | e09 PTR e10
+ | e09 : e10
+ | e10
+
+ e10 e10 [ expr ]
+ | e11
+
+ e11 ( expr )
+ | [ expr ]
+ | constant
+ | dataType
+ | id
+ | $
+ | register
+
+ => expr SHORT e05
+ | e05
+
+ gpRegister AX | EAX | BX | EBX | CX | ECX | DX | EDX
+ | BP | EBP | SP | ESP | DI | EDI | SI | ESI
+
+ hexdigit a | b | c | d | e | f
+ | A | B | C | D | E | F
+
+ id alpha
+ | id alpha
+ | id decdigit
+
+ mulOp * | / | MOD
+
+ quote " | '
+
+ register specialRegister
+ | gpRegister
+ | byteRegister
+
+ segmentRegister CS | DS | ES | FS | GS | SS
+
+ specialRegister CR0 | CR2 | CR3
+ | DR0 | DR1 | DR2 | DR3 | DR6 | DR7
+ | TR3 | TR4 | TR5 | TR6 | TR7
+
+ We simplify the grammar in obvious places (e.g., register parsing is
+ done by calling parse_register) and eliminate immediate left recursion
+ to implement a recursive-descent parser.
+
+ expr SHORT e05
+ | e05
+
+ e05 e06 e05'
+
+ e05' addOp e06 e05'
+ | Empty
+
+ e06 e09 e06'
+
+ e06' mulOp e09 e06'
+ | Empty
+
+ e09 OFFSET e10 e09'
+ | e10 e09'
+
+ e09' PTR e10 e09'
+ | : e10 e09'
+ | Empty
+
+ e10 e11 e10'
+
+ e10' [ expr ] e10'
+ | Empty
+
+ e11 ( expr )
+ | [ expr ]
+ | BYTE
+ | WORD
+ | DWORD
+ | QWORD
+ | XWORD
+ | .
+ | $
+ | register
+ | id
+ | constant */
+
+/* Parsing structure for the intel syntax parser. Used to implement the
+ semantic actions for the operand grammar. */
+struct intel_parser_s
+ {
+ char *op_string; /* The string being parsed. */
+ int got_a_float; /* Whether the operand is a float. */
+ int op_modifier; /* Operand modifier. */
+ int is_mem; /* 1 if operand is memory reference. */
+ const reg_entry *reg; /* Last register reference found. */
+ char *disp; /* Displacement string being built. */
+ };
+
+static struct intel_parser_s intel_parser;
+
+/* Token structure for parsing intel syntax. */
+struct intel_token
+ {
+ int code; /* Token code. */
+ const reg_entry *reg; /* Register entry for register tokens. */
+ char *str; /* String representation. */
+ };
+
+static struct intel_token cur_token, prev_token;
+
+/* Token codes for the intel parser. */
+#define T_NIL -1
+#define T_CONST 1
+#define T_REG 2
+#define T_BYTE 3
+#define T_WORD 4
+#define T_DWORD 5
+#define T_QWORD 6
+#define T_XWORD 7
+#define T_SHORT 8
+#define T_OFFSET 9
+#define T_PTR 10
+#define T_ID 11
+
+/* Prototypes for intel parser functions. */
+static int intel_match_token PARAMS ((int code));
+static void intel_get_token PARAMS ((void));
+static void intel_putback_token PARAMS ((void));
+static int intel_expr PARAMS ((void));
+static int intel_e05 PARAMS ((void));
+static int intel_e05_1 PARAMS ((void));
+static int intel_e06 PARAMS ((void));
+static int intel_e06_1 PARAMS ((void));
+static int intel_e09 PARAMS ((void));
+static int intel_e09_1 PARAMS ((void));
+static int intel_e10 PARAMS ((void));
+static int intel_e10_1 PARAMS ((void));
+static int intel_e11 PARAMS ((void));
+
+static int
+i386_intel_operand (operand_string, got_a_float)
+ char *operand_string;
+ int got_a_float;
+{
+ int ret;
+ char *p;
+
+ /* Initialize token holders. */
+ cur_token.code = prev_token.code = T_NIL;
+ cur_token.reg = prev_token.reg = NULL;
+ cur_token.str = prev_token.str = NULL;
+
+ /* Initialize parser structure. */
+ p = intel_parser.op_string = (char *)malloc (strlen (operand_string) + 1);
+ if (p == NULL)
+ abort ();
+ strcpy (intel_parser.op_string, operand_string);
+ intel_parser.got_a_float = got_a_float;
+ intel_parser.op_modifier = -1;
+ intel_parser.is_mem = 0;
+ intel_parser.reg = NULL;
+ intel_parser.disp = (char *)malloc (strlen (operand_string) + 1);
+ if (intel_parser.disp == NULL)
+ abort ();
+ intel_parser.disp[0] = '\0';
+
+ /* Read the first token and start the parser. */
+ intel_get_token ();
+ ret = intel_expr ();
+
+ if (ret)
+ {
+ /* If we found a memory reference, hand it over to i386_displacement
+ to fill in the rest of the operand fields. */
+ if (intel_parser.is_mem)
+ {
+ if ((i.mem_operands == 1
+ && (current_templates->start->opcode_modifier & IsString) == 0)
+ || i.mem_operands == 2)
+ {
+ as_bad (_("too many memory references for '%s'"),
+ current_templates->start->name);
+ ret = 0;
+ }
+ else
+ {
+ char *s = intel_parser.disp;
+ i.mem_operands++;
+
+ /* Add the displacement expression. */
+ if (*s != '\0')
+ ret = i386_displacement (s, s + strlen (s))
+ && i386_index_check (s);
+ }
+ }
+
+ /* Constant and OFFSET expressions are handled by i386_immediate. */
+ else if (intel_parser.op_modifier == OFFSET_FLAT
+ || intel_parser.reg == NULL)
+ ret = i386_immediate (intel_parser.disp);
+ }
+
+ free (p);
+ free (intel_parser.disp);
+
+ return ret;
+}
+
+/* expr SHORT e05
+ | e05 */
+static int
+intel_expr ()
+{
+ /* expr SHORT e05 */
+ if (cur_token.code == T_SHORT)
+ {
+ intel_parser.op_modifier = SHORT;
+ intel_match_token (T_SHORT);
+
+ return (intel_e05 ());
+ }
+
+ /* expr e05 */
+ else
+ return intel_e05 ();
+}
+
+/* e05 e06 e05'
+
+ e05' addOp e06 e05'
+ | Empty */
+static int
+intel_e05 ()
+{
+ return (intel_e06 () && intel_e05_1 ());
+}
+
+static int
+intel_e05_1 ()
+{
+ /* e05' addOp e06 e05' */
+ if (cur_token.code == '+' || cur_token.code == '-')
+ {
+ strcat (intel_parser.disp, cur_token.str);
+ intel_match_token (cur_token.code);
+
+ return (intel_e06 () && intel_e05_1 ());
+ }
+
+ /* e05' Empty */
+ else
+ return 1;
+}
+
+/* e06 e09 e06'
+
+ e06' mulOp e09 e06'
+ | Empty */
+static int
+intel_e06 ()
+{
+ return (intel_e09 () && intel_e06_1 ());
+}
+
+static int
+intel_e06_1 ()
+{
+ /* e06' mulOp e09 e06' */
+ if (cur_token.code == '*' || cur_token.code == '/')
+ {
+ strcat (intel_parser.disp, cur_token.str);
+ intel_match_token (cur_token.code);
+
+ return (intel_e09 () && intel_e06_1 ());
+ }
+
+ /* e06' Empty */
+ else
+ return 1;
+}
+
+/* e09 OFFSET e10 e09'
+ | e10 e09'
+
+ e09' PTR e10 e09'
+ | : e10 e09'
+ | Empty */
+static int
+intel_e09 ()
+{
+ /* e09 OFFSET e10 e09' */
+ if (cur_token.code == T_OFFSET)
+ {
+ intel_parser.is_mem = 0;
+ intel_parser.op_modifier = OFFSET_FLAT;
+ intel_match_token (T_OFFSET);
+
+ return (intel_e10 () && intel_e09_1 ());
+ }
+
+ /* e09 e10 e09' */
+ else
+ return (intel_e10 () && intel_e09_1 ());
+}
+
+static int
+intel_e09_1 ()
+{
+ /* e09' PTR e10 e09' */
+ if (cur_token.code == T_PTR)
+ {
+ if (prev_token.code == T_BYTE)
+ i.suffix = BYTE_MNEM_SUFFIX;
+
+ else if (prev_token.code == T_WORD)
+ {
+ if (intel_parser.got_a_float == 2) /* "fi..." */
+ i.suffix = SHORT_MNEM_SUFFIX;
+ else
+ i.suffix = WORD_MNEM_SUFFIX;
+ }
+
+ else if (prev_token.code == T_DWORD)
+ {
+ if (intel_parser.got_a_float == 1) /* "f..." */
+ i.suffix = SHORT_MNEM_SUFFIX;
+ else
+ i.suffix = LONG_MNEM_SUFFIX;
+ }
+
+ else if (prev_token.code == T_QWORD)
+ i.suffix = DWORD_MNEM_SUFFIX;
+
+ else if (prev_token.code == T_XWORD)
+ i.suffix = LONG_DOUBLE_MNEM_SUFFIX;
+
+ else
+ {
+ as_bad (_("Unknown operand modifier `%s'\n"), prev_token.str);
+ return 0;
+ }
+
+ intel_match_token (T_PTR);
+
+ return (intel_e10 () && intel_e09_1 ());
+ }
+
+ /* e09 : e10 e09' */
+ else if (cur_token.code == ':')
+ {
+ intel_parser.is_mem = 1;
+
+ return (intel_match_token (':') && intel_e10 () && intel_e09_1 ());
+ }
+
+ /* e09' Empty */
+ else
+ return 1;
+}
+
+/* e10 e11 e10'
+
+ e10' [ expr ] e10'
+ | Empty */
+static int
+intel_e10 ()
+{
+ return (intel_e11 () && intel_e10_1 ());
+}
+
+static int
+intel_e10_1 ()
+{
+ /* e10' [ expr ] e10' */
+ if (cur_token.code == '[')
+ {
+ intel_match_token ('[');
+ intel_parser.is_mem = 1;
+
+ /* Add a '+' to the displacement string if necessary. */
+ if (*intel_parser.disp != '\0')
+ strcat (intel_parser.disp, "+");
+
+ return (intel_expr () && intel_match_token (']') && intel_e10_1 ());
+ }
+
+ /* e10' Empty */
+ else
+ return 1;
+}
+
+/* e11 ( expr )
+ | [ expr ]
+ | BYTE
+ | WORD
+ | DWORD
+ | QWORD
+ | XWORD
+ | $
+ | .
+ | register
+ | id
+ | constant */
+static int
+intel_e11 ()
+{
+ /* e11 ( expr ) */
+ if (cur_token.code == '(')
+ {
+ intel_match_token ('(');
+ strcat (intel_parser.disp, "(");
+
+ if (intel_expr () && intel_match_token (')'))
+ {
+ strcat (intel_parser.disp, ")");
+ return 1;
+ }
+ else
+ return 0;
+ }
+
+ /* e11 [ expr ] */
+ else if (cur_token.code == '[')
+ {
+ intel_match_token ('[');
+ intel_parser.is_mem = 1;
+
+ /* Operands for jump/call inside brackets denote absolute addresses. */
+ if (current_templates->start->opcode_modifier & Jump
+ || current_templates->start->opcode_modifier & JumpDword
+ || current_templates->start->opcode_modifier & JumpByte
+ || current_templates->start->opcode_modifier & JumpInterSegment)
+ i.types[this_operand] |= JumpAbsolute;
+
+ /* Add a '+' to the displacement string if necessary. */
+ if (*intel_parser.disp != '\0')
+ strcat (intel_parser.disp, "+");
+
+ return (intel_expr () && intel_match_token (']'));
+ }
+
+ /* e11 BYTE
+ | WORD
+ | DWORD
+ | QWORD
+ | XWORD */
+ else if (cur_token.code == T_BYTE
+ || cur_token.code == T_WORD
+ || cur_token.code == T_DWORD
+ || cur_token.code == T_QWORD
+ || cur_token.code == T_XWORD)
+ {
+ intel_match_token (cur_token.code);
+
+ return 1;
+ }
+
+ /* e11 $
+ | . */
+ else if (cur_token.code == '$' || cur_token.code == '.')
+ {
+ strcat (intel_parser.disp, cur_token.str);
+ intel_match_token (cur_token.code);
+ intel_parser.is_mem = 1;
+
+ return 1;
+ }
+
+ /* e11 register */
+ else if (cur_token.code == T_REG)
+ {
+ const reg_entry *reg = intel_parser.reg = cur_token.reg;
+
+ intel_match_token (T_REG);
+
+ /* Check for segment change. */
+ if (cur_token.code == ':')
+ {
+ if (reg->reg_type & (SReg2 | SReg3))
+ {
+ switch (reg->reg_num)
+ {
+ case 0:
+ i.seg[i.mem_operands] = &es;
+ break;
+ case 1:
+ i.seg[i.mem_operands] = &cs;
+ break;
+ case 2:
+ i.seg[i.mem_operands] = &ss;
+ break;
+ case 3:
+ i.seg[i.mem_operands] = &ds;
+ break;
+ case 4:
+ i.seg[i.mem_operands] = &fs;
+ break;
+ case 5:
+ i.seg[i.mem_operands] = &gs;
+ break;
+ }
+ }
+ else
+ {
+ as_bad (_("`%s' is not a valid segment register"), reg->reg_name);
+ return 0;
+ }
+ }
+
+ /* Not a segment register. Check for register scaling. */
+ else if (cur_token.code == '*')
+ {
+ if (!intel_parser.is_mem)
+ {
+ as_bad (_("Register scaling only allowed in memory operands."));
+ return 0;
+ }
+
+ /* What follows must be a valid scale. */
+ if (intel_match_token ('*')
+ && strchr ("01248", *cur_token.str))
+ {
+ i.index_reg = reg;
+ i.types[this_operand] |= BaseIndex;
+
+ /* Set the scale after setting the register (otherwise,
+ i386_scale will complain) */
+ i386_scale (cur_token.str);
+ intel_match_token (T_CONST);
+ }
+ else
+ {
+ as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
+ cur_token.str);
+ return 0;
+ }
+ }
+
+ /* No scaling. If this is a memory operand, the register is either a
+ base register (first occurrence) or an index register (second
+ occurrence). */
+ else if (intel_parser.is_mem && !(reg->reg_type & (SReg2 | SReg3)))
+ {
+ if (i.base_reg && i.index_reg)
+ {
+ as_bad (_("Too many register references in memory operand.\n"));
+ return 0;
+ }
+
+ if (i.base_reg == NULL)
+ i.base_reg = reg;
+ else
+ i.index_reg = reg;
+
+ i.types[this_operand] |= BaseIndex;
+ }
+
+ /* Offset modifier. Add the register to the displacement string to be
+ parsed as an immediate expression after we're done. */
+ else if (intel_parser.op_modifier == OFFSET_FLAT)
+ strcat (intel_parser.disp, reg->reg_name);
+
+ /* It's neither base nor index nor offset. */
+ else
+ {
+ i.types[this_operand] |= reg->reg_type & ~BaseIndex;
+ i.op[this_operand].regs = reg;
+ i.reg_operands++;
+ }
+
+ /* Since registers are not part of the displacement string (except
+ when we're parsing offset operands), we may need to remove any
+ preceding '+' from the displacement string. */
+ if (*intel_parser.disp != '\0'
+ && intel_parser.op_modifier != OFFSET_FLAT)
+ {
+ char *s = intel_parser.disp;
+ s += strlen (s) - 1;
+ if (*s == '+')
+ *s = '\0';
+ }
+
+ return 1;
+ }
+
+ /* e11 id */
+ else if (cur_token.code == T_ID)
+ {
+ /* Add the identifier to the displacement string. */
+ strcat (intel_parser.disp, cur_token.str);
+ intel_match_token (T_ID);
+
+ /* The identifier represents a memory reference only if it's not
+ preceded by an offset modifier. */
+ if (intel_parser.op_modifier != OFFSET_FLAT
+ && intel_parser.op_modifier != FLAT)
+ intel_parser.is_mem = 1;
+
+ return 1;
+ }
+
+ /* e11 constant */
+ else if (cur_token.code == T_CONST
+ || cur_token.code == '-'
+ || cur_token.code == '+')
+ {
+ char *save_str;
+
+ /* Allow constants that start with `+' or `-'. */
+ if (cur_token.code == '-' || cur_token.code == '+')
+ {
+ strcat (intel_parser.disp, cur_token.str);
+ intel_match_token (cur_token.code);
+ if (cur_token.code != T_CONST)
+ {
+ as_bad (_("Syntax error. Expecting a constant. Got `%s'.\n"),
+ cur_token.str);
+ return 0;
+ }
+ }
+
+ save_str = (char *)malloc (strlen (cur_token.str) + 1);
+ if (save_str == NULL)
+ abort ();
+ strcpy (save_str, cur_token.str);
+
+ /* Get the next token to check for register scaling. */
+ intel_match_token (cur_token.code);
+
+ /* Check if this constant is a scaling factor for an index register. */
+ if (cur_token.code == '*')
+ {
+ if (intel_match_token ('*') && cur_token.code == T_REG)
+ {
+ if (!intel_parser.is_mem)
+ {
+ as_bad (_("Register scaling only allowed in memory operands."));
+ return 0;
+ }
+
+ /* The constant is followed by `* reg', so it must be
+ a valid scale. */
+ if (strchr ("01248", *save_str))
+ {
+ i.index_reg = cur_token.reg;
+ i.types[this_operand] |= BaseIndex;
+
+ /* Set the scale after setting the register (otherwise,
+ i386_scale will complain) */
+ i386_scale (save_str);
+ intel_match_token (T_REG);
+
+ /* Since registers are not part of the displacement
+ string, we may need to remove any preceding '+' from
+ the displacement string. */
+ if (*intel_parser.disp != '\0')
+ {
+ char *s = intel_parser.disp;
+ s += strlen (s) - 1;
+ if (*s == '+')
+ *s = '\0';
+ }
+
+ free (save_str);
+
+ return 1;
+ }
+ else
+ return 0;
+ }
+
+ /* The constant was not used for register scaling. Since we have
+ already consumed the token following `*' we now need to put it
+ back in the stream. */
+ else
+ intel_putback_token ();
+ }
+
+ /* Add the constant to the displacement string. */
+ strcat (intel_parser.disp, save_str);
+ free (save_str);
+
+ return 1;
+ }
+
+ as_bad (_("Unrecognized token '%s'"), cur_token.str);
+ return 0;
+}
+
+/* Match the given token against cur_token. If they match, read the next
+ token from the operand string. */
+static int
+intel_match_token (code)
+ int code;
+{
+ if (cur_token.code == code)
+ {
+ intel_get_token ();
+ return 1;
+ }
+ else
+ {
+ as_bad (_("Unexpected token `%s'\n"), cur_token.str);
+ return 0;
+ }
+}
+
+/* Read a new token from intel_parser.op_string and store it in cur_token. */
+static void
+intel_get_token ()
+{
+ char *end_op;
+ const reg_entry *reg;
+ struct intel_token new_token;
+
+ new_token.code = T_NIL;
+ new_token.reg = NULL;
+ new_token.str = NULL;
+
+ /* Free the memory allocated to the previous token and move
+ cur_token to prev_token. */
+ if (prev_token.str)
+ free (prev_token.str);
+
+ prev_token = cur_token;
+
+ /* Skip whitespace. */
+ while (is_space_char (*intel_parser.op_string))
+ intel_parser.op_string++;
+
+ /* Return an empty token if we find nothing else on the line. */
+ if (*intel_parser.op_string == '\0')
+ {
+ cur_token = new_token;
+ return;
+ }
+
+ /* The new token cannot be larger than the remainder of the operand
+ string. */
+ new_token.str = (char *)malloc (strlen (intel_parser.op_string) + 1);
+ if (new_token.str == NULL)
+ abort ();
+ new_token.str[0] = '\0';
+
+ if (strchr ("0123456789", *intel_parser.op_string))
+ {
+ char *p = new_token.str;
+ char *q = intel_parser.op_string;
+ new_token.code = T_CONST;
+
+ /* Allow any kind of identifier char to encompass floating point and
+ hexadecimal numbers. */
+ while (is_identifier_char (*q))
+ *p++ = *q++;
+ *p = '\0';
+
+ /* Recognize special symbol names [0-9][bf]. */
+ if (strlen (intel_parser.op_string) == 2
+ && (intel_parser.op_string[1] == 'b'
+ || intel_parser.op_string[1] == 'f'))
+ new_token.code = T_ID;
+ }
+
+ else if (strchr ("+-/*:[]()", *intel_parser.op_string))
+ {
+ new_token.code = *intel_parser.op_string;
+ new_token.str[0] = *intel_parser.op_string;
+ new_token.str[1] = '\0';
+ }
+
+ else if ((*intel_parser.op_string == REGISTER_PREFIX || allow_naked_reg)
+ && ((reg = parse_register (intel_parser.op_string, &end_op)) != NULL))
+ {
+ new_token.code = T_REG;
+ new_token.reg = reg;
+
+ if (*intel_parser.op_string == REGISTER_PREFIX)
+ {
+ new_token.str[0] = REGISTER_PREFIX;
+ new_token.str[1] = '\0';
+ }
+
+ strcat (new_token.str, reg->reg_name);
+ }
+
+ else if (is_identifier_char (*intel_parser.op_string))
+ {
+ char *p = new_token.str;
+ char *q = intel_parser.op_string;
+
+ /* A '.' or '$' followed by an identifier char is an identifier.
+ Otherwise, it's operator '.' followed by an expression. */
+ if ((*q == '.' || *q == '$') && !is_identifier_char (*(q + 1)))
+ {
+ new_token.code = *q;
+ new_token.str[0] = *q;
+ new_token.str[1] = '\0';
+ }
+ else
+ {
+ while (is_identifier_char (*q) || *q == '@')
+ *p++ = *q++;
+ *p = '\0';
+
+ if (strcasecmp (new_token.str, "BYTE") == 0)
+ new_token.code = T_BYTE;
+
+ else if (strcasecmp (new_token.str, "WORD") == 0)
+ new_token.code = T_WORD;
+
+ else if (strcasecmp (new_token.str, "DWORD") == 0)
+ new_token.code = T_DWORD;
+
+ else if (strcasecmp (new_token.str, "QWORD") == 0)
+ new_token.code = T_QWORD;
+
+ else if (strcasecmp (new_token.str, "XWORD") == 0)
+ new_token.code = T_XWORD;
+
+ else if (strcasecmp (new_token.str, "PTR") == 0)
+ new_token.code = T_PTR;
+
+ else if (strcasecmp (new_token.str, "SHORT") == 0)
+ new_token.code = T_SHORT;
+
+ else if (strcasecmp (new_token.str, "OFFSET") == 0)
+ {
+ new_token.code = T_OFFSET;
+
+ /* ??? This is not mentioned in the MASM grammar but gcc
+ makes use of it with -mintel-syntax. OFFSET may be
+ followed by FLAT: */
+ if (strncasecmp (q, " FLAT:", 6) == 0)
+ strcat (new_token.str, " FLAT:");
+ }
+
+ /* ??? This is not mentioned in the MASM grammar. */
+ else if (strcasecmp (new_token.str, "FLAT") == 0)
+ new_token.code = T_OFFSET;
+
+ else
+ new_token.code = T_ID;
+ }
+ }
+
+ else
+ as_bad (_("Unrecognized token `%s'\n"), intel_parser.op_string);
+
+ intel_parser.op_string += strlen (new_token.str);
+ cur_token = new_token;
+}
+
+/* Put cur_token back into the token stream and make cur_token point to
+ prev_token. */
+static void
+intel_putback_token ()
+{
+ intel_parser.op_string -= strlen (cur_token.str);
+ free (cur_token.str);
+ cur_token = prev_token;
+
+ /* Forget prev_token. */
+ prev_token.code = T_NIL;
+ prev_token.reg = NULL;
+ prev_token.str = NULL;
+}
projects / deliverable / binutils-gdb.git / blobdiff