0,0 → 1,1005 |
/* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64 |
Copyright 2009, 2010 |
Free Software Foundation, Inc. |
|
This file is part of GAS, the GNU Assembler. |
|
GAS is free software; you can redistribute it and/or modify |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 3, or (at your option) |
any later version. |
|
GAS is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
|
You should have received a copy of the GNU General Public License |
along with GAS; see the file COPYING. If not, write to the Free |
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
02110-1301, USA. */ |
|
static struct |
{ |
operatorT op_modifier; /* Operand modifier. */ |
int is_mem; /* 1 if operand is memory reference. */ |
int is_indirect; /* 1 if operand is indirect reference. */ |
int has_offset; /* 1 if operand has offset. */ |
unsigned int in_offset; /* >=1 if processing operand of offset. */ |
unsigned int in_bracket; /* >=1 if processing operand in brackets. */ |
unsigned int in_scale; /* >=1 if processing multipication operand |
* in brackets. */ |
i386_operand_type reloc_types; /* Value obtained from lex_got(). */ |
const reg_entry *base; /* Base register (if any). */ |
const reg_entry *index; /* Index register (if any). */ |
offsetT scale_factor; /* Accumulated scale factor. */ |
symbolS *seg; |
} |
intel_state; |
|
/* offset X_add_symbol */ |
#define O_offset O_md32 |
/* offset X_add_symbol */ |
#define O_short O_md31 |
/* near ptr X_add_symbol */ |
#define O_near_ptr O_md30 |
/* far ptr X_add_symbol */ |
#define O_far_ptr O_md29 |
/* byte ptr X_add_symbol */ |
#define O_byte_ptr O_md28 |
/* word ptr X_add_symbol */ |
#define O_word_ptr O_md27 |
/* dword ptr X_add_symbol */ |
#define O_dword_ptr O_md26 |
/* qword ptr X_add_symbol */ |
#define O_qword_ptr O_md25 |
/* oword ptr X_add_symbol */ |
#define O_oword_ptr O_md24 |
/* fword ptr X_add_symbol */ |
#define O_fword_ptr O_md23 |
/* tbyte ptr X_add_symbol */ |
#define O_tbyte_ptr O_md22 |
/* xmmword ptr X_add_symbol */ |
#define O_xmmword_ptr O_md21 |
/* ymmword ptr X_add_symbol */ |
#define O_ymmword_ptr O_md20 |
/* zmmword ptr X_add_symbol */ |
#define O_zmmword_ptr O_md19 |
|
static struct |
{ |
const char *name; |
operatorT op; |
unsigned int operands; |
} |
const i386_operators[] = |
{ |
{ "and", O_bit_and, 2 }, |
{ "eq", O_eq, 2 }, |
{ "ge", O_ge, 2 }, |
{ "gt", O_gt, 2 }, |
{ "le", O_le, 2 }, |
{ "lt", O_lt, 2 }, |
{ "mod", O_modulus, 2 }, |
{ "ne", O_ne, 2 }, |
{ "not", O_bit_not, 1 }, |
{ "offset", O_offset, 1 }, |
{ "or", O_bit_inclusive_or, 2 }, |
{ "shl", O_left_shift, 2 }, |
{ "short", O_short, 1 }, |
{ "shr", O_right_shift, 2 }, |
{ "xor", O_bit_exclusive_or, 2 }, |
{ NULL, O_illegal, 0 } |
}; |
|
static struct |
{ |
const char *name; |
operatorT op; |
unsigned short sz[3]; |
} |
const i386_types[] = |
{ |
#define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } } |
I386_TYPE(byte, 1), |
I386_TYPE(word, 2), |
I386_TYPE(dword, 4), |
I386_TYPE(fword, 6), |
I386_TYPE(qword, 8), |
I386_TYPE(tbyte, 10), |
I386_TYPE(oword, 16), |
I386_TYPE(xmmword, 16), |
I386_TYPE(ymmword, 32), |
I386_TYPE(zmmword, 64), |
#undef I386_TYPE |
{ "near", O_near_ptr, { 0xff04, 0xff02, 0xff08 } }, |
{ "far", O_far_ptr, { 0xff06, 0xff05, 0xff06 } }, |
{ NULL, O_illegal, { 0, 0, 0 } } |
}; |
|
operatorT i386_operator (const char *name, unsigned int operands, char *pc) |
{ |
unsigned int j; |
|
if (!intel_syntax) |
return O_absent; |
|
if (!name) |
{ |
if (operands != 2) |
return O_illegal; |
switch (*input_line_pointer) |
{ |
case ':': |
++input_line_pointer; |
return O_full_ptr; |
case '[': |
++input_line_pointer; |
return O_index; |
case '@': |
if (this_operand >= 0 && i.reloc[this_operand] == NO_RELOC) |
{ |
int adjust = 0; |
char *gotfree_input_line = lex_got (&i.reloc[this_operand], |
&adjust, |
&intel_state.reloc_types, |
(i.bnd_prefix != NULL |
|| add_bnd_prefix)); |
|
if (!gotfree_input_line) |
break; |
free (gotfree_input_line); |
*input_line_pointer++ = '+'; |
memset (input_line_pointer, '0', adjust - 1); |
input_line_pointer[adjust - 1] = ' '; |
return O_add; |
} |
break; |
} |
return O_illegal; |
} |
|
for (j = 0; i386_operators[j].name; ++j) |
if (strcasecmp (i386_operators[j].name, name) == 0) |
{ |
if (i386_operators[j].operands |
&& i386_operators[j].operands != operands) |
return O_illegal; |
return i386_operators[j].op; |
} |
|
for (j = 0; i386_types[j].name; ++j) |
if (strcasecmp (i386_types[j].name, name) == 0) |
break; |
if (i386_types[j].name && *pc == ' ') |
{ |
char *pname = ++input_line_pointer; |
char c = get_symbol_end (); |
|
if (strcasecmp (pname, "ptr") == 0) |
{ |
pname[-1] = *pc; |
*pc = c; |
if (intel_syntax > 0 || operands != 1) |
return O_illegal; |
return i386_types[j].op; |
} |
|
*input_line_pointer = c; |
input_line_pointer = pname - 1; |
} |
|
return O_absent; |
} |
|
static int i386_intel_parse_name (const char *name, expressionS *e) |
{ |
unsigned int j; |
|
if (! strcmp (name, "$")) |
{ |
current_location (e); |
return 1; |
} |
|
for (j = 0; i386_types[j].name; ++j) |
if (strcasecmp(i386_types[j].name, name) == 0) |
{ |
e->X_op = O_constant; |
e->X_add_number = i386_types[j].sz[flag_code]; |
e->X_add_symbol = NULL; |
e->X_op_symbol = NULL; |
return 1; |
} |
|
return 0; |
} |
|
static INLINE int i386_intel_check (const reg_entry *rreg, |
const reg_entry *base, |
const reg_entry *iindex) |
{ |
if ((this_operand >= 0 |
&& rreg != i.op[this_operand].regs) |
|| base != intel_state.base |
|| iindex != intel_state.index) |
{ |
as_bad (_("invalid use of register")); |
return 0; |
} |
return 1; |
} |
|
static INLINE void i386_intel_fold (expressionS *e, symbolS *sym) |
{ |
expressionS *exp = symbol_get_value_expression (sym); |
if (S_GET_SEGMENT (sym) == absolute_section) |
{ |
offsetT val = e->X_add_number; |
|
*e = *exp; |
e->X_add_number += val; |
} |
else |
{ |
if (exp->X_op == O_symbol |
&& strcmp (S_GET_NAME (exp->X_add_symbol), |
GLOBAL_OFFSET_TABLE_NAME) == 0) |
sym = exp->X_add_symbol; |
e->X_add_symbol = sym; |
e->X_op_symbol = NULL; |
e->X_op = O_symbol; |
} |
} |
|
static int |
i386_intel_simplify_register (expressionS *e) |
{ |
int reg_num; |
|
if (this_operand < 0 || intel_state.in_offset) |
{ |
as_bad (_("invalid use of register")); |
return 0; |
} |
|
if (e->X_op == O_register) |
reg_num = e->X_add_number; |
else |
reg_num = e->X_md - 1; |
|
if (!intel_state.in_bracket) |
{ |
if (i.op[this_operand].regs) |
{ |
as_bad (_("invalid use of register")); |
return 0; |
} |
if (i386_regtab[reg_num].reg_type.bitfield.sreg3 |
&& i386_regtab[reg_num].reg_num == RegFlat) |
{ |
as_bad (_("invalid use of pseudo-register")); |
return 0; |
} |
i.op[this_operand].regs = i386_regtab + reg_num; |
} |
else if (!intel_state.index |
&& (i386_regtab[reg_num].reg_type.bitfield.regxmm |
|| i386_regtab[reg_num].reg_type.bitfield.regymm |
|| i386_regtab[reg_num].reg_type.bitfield.regzmm)) |
intel_state.index = i386_regtab + reg_num; |
else if (!intel_state.base && !intel_state.in_scale) |
intel_state.base = i386_regtab + reg_num; |
else if (!intel_state.index) |
{ |
if (intel_state.in_scale |
|| i386_regtab[reg_num].reg_type.bitfield.baseindex) |
intel_state.index = i386_regtab + reg_num; |
else |
{ |
/* Convert base to index and make ESP/RSP the base. */ |
intel_state.index = intel_state.base; |
intel_state.base = i386_regtab + reg_num; |
} |
} |
else |
{ |
/* esp is invalid as index */ |
intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; |
} |
return 2; |
} |
|
static int i386_intel_simplify (expressionS *); |
|
static INLINE int i386_intel_simplify_symbol(symbolS *sym) |
{ |
int ret = i386_intel_simplify (symbol_get_value_expression (sym)); |
|
if (ret == 2) |
{ |
S_SET_SEGMENT(sym, absolute_section); |
ret = 1; |
} |
return ret; |
} |
|
static int i386_intel_simplify (expressionS *e) |
{ |
const reg_entry *the_reg = (this_operand >= 0 |
? i.op[this_operand].regs : NULL); |
const reg_entry *base = intel_state.base; |
const reg_entry *state_index = intel_state.index; |
int ret; |
|
if (!intel_syntax) |
return 1; |
|
switch (e->X_op) |
{ |
case O_index: |
if (e->X_add_symbol) |
{ |
if (!i386_intel_simplify_symbol (e->X_add_symbol) |
|| !i386_intel_check(the_reg, intel_state.base, |
intel_state.index)) |
return 0; |
} |
if (!intel_state.in_offset) |
++intel_state.in_bracket; |
ret = i386_intel_simplify_symbol (e->X_op_symbol); |
if (!intel_state.in_offset) |
--intel_state.in_bracket; |
if (!ret) |
return 0; |
if (e->X_add_symbol) |
e->X_op = O_add; |
else |
i386_intel_fold (e, e->X_op_symbol); |
break; |
|
case O_offset: |
intel_state.has_offset = 1; |
++intel_state.in_offset; |
ret = i386_intel_simplify_symbol (e->X_add_symbol); |
--intel_state.in_offset; |
if (!ret || !i386_intel_check(the_reg, base, state_index)) |
return 0; |
i386_intel_fold (e, e->X_add_symbol); |
return ret; |
|
case O_byte_ptr: |
case O_word_ptr: |
case O_dword_ptr: |
case O_fword_ptr: |
case O_qword_ptr: |
case O_tbyte_ptr: |
case O_oword_ptr: |
case O_xmmword_ptr: |
case O_ymmword_ptr: |
case O_zmmword_ptr: |
case O_near_ptr: |
case O_far_ptr: |
if (intel_state.op_modifier == O_absent) |
intel_state.op_modifier = e->X_op; |
/* FALLTHROUGH */ |
case O_short: |
if (symbol_get_value_expression (e->X_add_symbol)->X_op |
== O_register) |
{ |
as_bad (_("invalid use of register")); |
return 0; |
} |
if (!i386_intel_simplify_symbol (e->X_add_symbol)) |
return 0; |
i386_intel_fold (e, e->X_add_symbol); |
break; |
|
case O_full_ptr: |
if (symbol_get_value_expression (e->X_op_symbol)->X_op |
== O_register) |
{ |
as_bad (_("invalid use of register")); |
return 0; |
} |
if (!i386_intel_simplify_symbol (e->X_op_symbol) |
|| !i386_intel_check(the_reg, intel_state.base, |
intel_state.index)) |
return 0; |
if (!intel_state.in_offset) |
intel_state.seg = e->X_add_symbol; |
i386_intel_fold (e, e->X_op_symbol); |
break; |
|
case O_multiply: |
if (this_operand >= 0 && intel_state.in_bracket) |
{ |
expressionS *scale = NULL; |
|
if (intel_state.index) |
--scale; |
|
if (!intel_state.in_scale++) |
intel_state.scale_factor = 1; |
|
ret = i386_intel_simplify_symbol (e->X_add_symbol); |
if (ret && !scale && intel_state.index) |
scale = symbol_get_value_expression (e->X_op_symbol); |
|
if (ret) |
ret = i386_intel_simplify_symbol (e->X_op_symbol); |
if (ret && !scale && intel_state.index) |
scale = symbol_get_value_expression (e->X_add_symbol); |
|
if (ret && scale && (scale + 1)) |
{ |
resolve_expression (scale); |
if (scale->X_op != O_constant |
|| intel_state.index->reg_type.bitfield.reg16) |
scale->X_add_number = 0; |
intel_state.scale_factor *= scale->X_add_number; |
} |
|
--intel_state.in_scale; |
if (!ret) |
return 0; |
|
if (!intel_state.in_scale) |
switch (intel_state.scale_factor) |
{ |
case 1: |
i.log2_scale_factor = 0; |
break; |
case 2: |
i.log2_scale_factor = 1; |
break; |
case 4: |
i.log2_scale_factor = 2; |
break; |
case 8: |
i.log2_scale_factor = 3; |
break; |
default: |
/* esp is invalid as index */ |
intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; |
break; |
} |
|
break; |
} |
goto fallthrough; |
|
case O_register: |
ret = i386_intel_simplify_register (e); |
if (ret == 2) |
{ |
gas_assert (e->X_add_number < (unsigned short) -1); |
e->X_md = (unsigned short) e->X_add_number + 1; |
e->X_op = O_constant; |
e->X_add_number = 0; |
} |
return ret; |
|
case O_constant: |
if (e->X_md) |
return i386_intel_simplify_register (e); |
|
/* FALLTHROUGH */ |
default: |
fallthrough: |
if (e->X_add_symbol |
&& !i386_intel_simplify_symbol (e->X_add_symbol)) |
return 0; |
if (e->X_op == O_add || e->X_op == O_subtract) |
{ |
base = intel_state.base; |
state_index = intel_state.index; |
} |
if (!i386_intel_check (the_reg, base, state_index) |
|| (e->X_op_symbol |
&& !i386_intel_simplify_symbol (e->X_op_symbol)) |
|| !i386_intel_check (the_reg, |
(e->X_op != O_add |
? base : intel_state.base), |
(e->X_op != O_add |
? state_index : intel_state.index))) |
return 0; |
break; |
} |
|
if (this_operand >= 0 |
&& e->X_op == O_symbol |
&& !intel_state.in_offset) |
{ |
segT seg = S_GET_SEGMENT (e->X_add_symbol); |
|
if (seg != absolute_section |
&& seg != reg_section |
&& seg != expr_section) |
intel_state.is_mem |= 2 - !intel_state.in_bracket; |
} |
|
return 1; |
} |
|
int i386_need_index_operator (void) |
{ |
return intel_syntax < 0; |
} |
|
static int |
i386_intel_operand (char *operand_string, int got_a_float) |
{ |
char *saved_input_line_pointer, *buf; |
segT exp_seg; |
expressionS exp, *expP; |
char suffix = 0; |
int ret; |
|
/* Handle vector immediates. */ |
if (RC_SAE_immediate (operand_string)) |
return 1; |
|
/* Initialize state structure. */ |
intel_state.op_modifier = O_absent; |
intel_state.is_mem = 0; |
intel_state.is_indirect = 0; |
intel_state.has_offset = 0; |
intel_state.base = NULL; |
intel_state.index = NULL; |
intel_state.seg = NULL; |
operand_type_set (&intel_state.reloc_types, ~0); |
gas_assert (!intel_state.in_offset); |
gas_assert (!intel_state.in_bracket); |
gas_assert (!intel_state.in_scale); |
|
saved_input_line_pointer = input_line_pointer; |
input_line_pointer = buf = xstrdup (operand_string); |
|
intel_syntax = -1; |
memset (&exp, 0, sizeof(exp)); |
exp_seg = expression (&exp); |
ret = i386_intel_simplify (&exp); |
intel_syntax = 1; |
|
SKIP_WHITESPACE (); |
|
/* Handle vector operations. */ |
if (*input_line_pointer == '{') |
{ |
char *end = check_VecOperations (input_line_pointer, NULL); |
if (end) |
input_line_pointer = end; |
else |
ret = 0; |
} |
|
if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
{ |
as_bad (_("junk `%s' after expression"), input_line_pointer); |
ret = 0; |
} |
else if (exp.X_op == O_illegal || exp.X_op == O_absent) |
{ |
as_bad (_("invalid expression")); |
ret = 0; |
} |
else if (!intel_state.has_offset |
&& input_line_pointer > buf |
&& *(input_line_pointer - 1) == ']') |
{ |
intel_state.is_mem |= 1; |
intel_state.is_indirect = 1; |
} |
|
input_line_pointer = saved_input_line_pointer; |
free (buf); |
|
gas_assert (!intel_state.in_offset); |
gas_assert (!intel_state.in_bracket); |
gas_assert (!intel_state.in_scale); |
|
if (!ret) |
return 0; |
|
if (intel_state.op_modifier != O_absent |
&& current_templates->start->base_opcode != 0x8d /* lea */) |
{ |
i.types[this_operand].bitfield.unspecified = 0; |
|
switch (intel_state.op_modifier) |
{ |
case O_byte_ptr: |
i.types[this_operand].bitfield.byte = 1; |
suffix = BYTE_MNEM_SUFFIX; |
break; |
|
case O_word_ptr: |
i.types[this_operand].bitfield.word = 1; |
if ((current_templates->start->name[0] == 'l' |
&& current_templates->start->name[2] == 's' |
&& current_templates->start->name[3] == 0) |
|| current_templates->start->base_opcode == 0x62 /* bound */) |
suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ |
else if (got_a_float == 2) /* "fi..." */ |
suffix = SHORT_MNEM_SUFFIX; |
else |
suffix = WORD_MNEM_SUFFIX; |
break; |
|
case O_dword_ptr: |
i.types[this_operand].bitfield.dword = 1; |
if ((current_templates->start->name[0] == 'l' |
&& current_templates->start->name[2] == 's' |
&& current_templates->start->name[3] == 0) |
|| current_templates->start->base_opcode == 0x62 /* bound */) |
suffix = WORD_MNEM_SUFFIX; |
else if (flag_code == CODE_16BIT |
&& (current_templates->start->opcode_modifier.jump |
|| current_templates->start->opcode_modifier.jumpdword)) |
suffix = LONG_DOUBLE_MNEM_SUFFIX; |
else if (got_a_float == 1) /* "f..." */ |
suffix = SHORT_MNEM_SUFFIX; |
else |
suffix = LONG_MNEM_SUFFIX; |
break; |
|
case O_fword_ptr: |
i.types[this_operand].bitfield.fword = 1; |
if (current_templates->start->name[0] == 'l' |
&& current_templates->start->name[2] == 's' |
&& current_templates->start->name[3] == 0) |
suffix = LONG_MNEM_SUFFIX; |
else if (!got_a_float) |
{ |
if (flag_code == CODE_16BIT) |
add_prefix (DATA_PREFIX_OPCODE); |
suffix = LONG_DOUBLE_MNEM_SUFFIX; |
} |
else |
suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ |
break; |
|
case O_qword_ptr: |
i.types[this_operand].bitfield.qword = 1; |
if (current_templates->start->base_opcode == 0x62 /* bound */ |
|| got_a_float == 1) /* "f..." */ |
suffix = LONG_MNEM_SUFFIX; |
else |
suffix = QWORD_MNEM_SUFFIX; |
break; |
|
case O_tbyte_ptr: |
i.types[this_operand].bitfield.tbyte = 1; |
if (got_a_float == 1) |
suffix = LONG_DOUBLE_MNEM_SUFFIX; |
else |
suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ |
break; |
|
case O_oword_ptr: |
case O_xmmword_ptr: |
i.types[this_operand].bitfield.xmmword = 1; |
suffix = XMMWORD_MNEM_SUFFIX; |
break; |
|
case O_ymmword_ptr: |
i.types[this_operand].bitfield.ymmword = 1; |
suffix = YMMWORD_MNEM_SUFFIX; |
break; |
|
case O_zmmword_ptr: |
i.types[this_operand].bitfield.zmmword = 1; |
suffix = ZMMWORD_MNEM_SUFFIX; |
break; |
|
case O_far_ptr: |
suffix = LONG_DOUBLE_MNEM_SUFFIX; |
/* FALLTHROUGH */ |
case O_near_ptr: |
if (!current_templates->start->opcode_modifier.jump |
&& !current_templates->start->opcode_modifier.jumpdword) |
suffix = got_a_float /* so it will cause an error */ |
? BYTE_MNEM_SUFFIX |
: LONG_DOUBLE_MNEM_SUFFIX; |
break; |
|
default: |
BAD_CASE (intel_state.op_modifier); |
break; |
} |
|
if (!i.suffix) |
i.suffix = suffix; |
else if (i.suffix != suffix) |
{ |
as_bad (_("conflicting operand size modifiers")); |
return 0; |
} |
} |
|
/* Operands for jump/call need special consideration. */ |
if (current_templates->start->opcode_modifier.jump |
|| current_templates->start->opcode_modifier.jumpdword |
|| current_templates->start->opcode_modifier.jumpintersegment) |
{ |
if (i.op[this_operand].regs |
|| intel_state.base |
|| intel_state.index |
|| intel_state.is_mem > 1) |
i.types[this_operand].bitfield.jumpabsolute = 1; |
else |
switch (intel_state.op_modifier) |
{ |
case O_near_ptr: |
if (intel_state.seg) |
i.types[this_operand].bitfield.jumpabsolute = 1; |
else |
intel_state.is_mem = 1; |
break; |
case O_far_ptr: |
case O_absent: |
if (!intel_state.seg) |
{ |
intel_state.is_mem = 1; |
if (intel_state.op_modifier == O_absent) |
{ |
if (intel_state.is_indirect == 1) |
i.types[this_operand].bitfield.jumpabsolute = 1; |
break; |
} |
as_bad (_("cannot infer the segment part of the operand")); |
return 0; |
} |
else if (S_GET_SEGMENT (intel_state.seg) == reg_section) |
i.types[this_operand].bitfield.jumpabsolute = 1; |
else |
{ |
i386_operand_type types; |
|
if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) |
{ |
as_bad (_("at most %d immediate operands are allowed"), |
MAX_IMMEDIATE_OPERANDS); |
return 0; |
} |
expP = &im_expressions[i.imm_operands++]; |
memset (expP, 0, sizeof(*expP)); |
expP->X_op = O_symbol; |
expP->X_add_symbol = intel_state.seg; |
i.op[this_operand].imms = expP; |
|
resolve_expression (expP); |
operand_type_set (&types, ~0); |
if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state.seg), |
expP, types, operand_string)) |
return 0; |
if (i.operands < MAX_OPERANDS) |
{ |
this_operand = i.operands++; |
i.types[this_operand].bitfield.unspecified = 1; |
} |
if (suffix == LONG_DOUBLE_MNEM_SUFFIX) |
i.suffix = 0; |
intel_state.seg = NULL; |
intel_state.is_mem = 0; |
} |
break; |
default: |
i.types[this_operand].bitfield.jumpabsolute = 1; |
break; |
} |
if (i.types[this_operand].bitfield.jumpabsolute) |
intel_state.is_mem |= 1; |
} |
else if (intel_state.seg) |
intel_state.is_mem |= 1; |
|
if (i.op[this_operand].regs) |
{ |
i386_operand_type temp; |
|
/* Register operand. */ |
if (intel_state.base || intel_state.index || intel_state.seg) |
{ |
as_bad (_("invalid operand")); |
return 0; |
} |
|
temp = i.op[this_operand].regs->reg_type; |
temp.bitfield.baseindex = 0; |
i.types[this_operand] = operand_type_or (i.types[this_operand], |
temp); |
i.types[this_operand].bitfield.unspecified = 0; |
++i.reg_operands; |
} |
else if (intel_state.base |
|| intel_state.index |
|| intel_state.seg |
|| intel_state.is_mem) |
{ |
/* Memory operand. */ |
if ((int) i.mem_operands |
>= 2 - !current_templates->start->opcode_modifier.isstring) |
{ |
/* Handle |
|
call 0x9090,0x90909090 |
lcall 0x9090,0x90909090 |
jmp 0x9090,0x90909090 |
ljmp 0x9090,0x90909090 |
*/ |
|
if ((current_templates->start->opcode_modifier.jumpintersegment |
|| current_templates->start->opcode_modifier.jumpdword |
|| current_templates->start->opcode_modifier.jump) |
&& this_operand == 1 |
&& intel_state.seg == NULL |
&& i.mem_operands == 1 |
&& i.disp_operands == 1 |
&& intel_state.op_modifier == O_absent) |
{ |
/* Try to process the first operand as immediate, */ |
this_operand = 0; |
if (i386_finalize_immediate (exp_seg, i.op[0].imms, |
intel_state.reloc_types, |
NULL)) |
{ |
this_operand = 1; |
expP = &im_expressions[0]; |
i.op[this_operand].imms = expP; |
*expP = exp; |
|
/* Try to process the second operand as immediate, */ |
if (i386_finalize_immediate (exp_seg, expP, |
intel_state.reloc_types, |
NULL)) |
{ |
i.mem_operands = 0; |
i.disp_operands = 0; |
i.imm_operands = 2; |
i.types[0].bitfield.mem = 0; |
i.types[0].bitfield.disp16 = 0; |
i.types[0].bitfield.disp32 = 0; |
i.types[0].bitfield.disp32s = 0; |
return 1; |
} |
} |
} |
|
as_bad (_("too many memory references for `%s'"), |
current_templates->start->name); |
return 0; |
} |
|
expP = &disp_expressions[i.disp_operands]; |
memcpy (expP, &exp, sizeof(exp)); |
resolve_expression (expP); |
|
if (expP->X_op != O_constant |
|| expP->X_add_number |
|| (!intel_state.base |
&& !intel_state.index)) |
{ |
i.op[this_operand].disps = expP; |
i.disp_operands++; |
|
if (flag_code == CODE_64BIT) |
{ |
i.types[this_operand].bitfield.disp32 = 1; |
if (!i.prefix[ADDR_PREFIX]) |
{ |
i.types[this_operand].bitfield.disp64 = 1; |
i.types[this_operand].bitfield.disp32s = 1; |
} |
} |
else if (!i.prefix[ADDR_PREFIX] ^ (flag_code == CODE_16BIT)) |
i.types[this_operand].bitfield.disp32 = 1; |
else |
i.types[this_operand].bitfield.disp16 = 1; |
|
#if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) |
/* |
* exp_seg is used only for verification in |
* i386_finalize_displacement, and we can end up seeing reg_section |
* here - but we know we removed all registers from the expression |
* (or error-ed on any remaining ones) in i386_intel_simplify. I |
* consider the check in i386_finalize_displacement bogus anyway, in |
* particular because it doesn't allow for expr_section, so I'd |
* rather see that check (and the similar one in |
* i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out |
* expert I can't really say whether that would have other bad side |
* effects. |
*/ |
if (OUTPUT_FLAVOR == bfd_target_aout_flavour |
&& exp_seg == reg_section) |
exp_seg = expP->X_op != O_constant ? undefined_section |
: absolute_section; |
#endif |
|
if (!i386_finalize_displacement (exp_seg, expP, |
intel_state.reloc_types, |
operand_string)) |
return 0; |
} |
|
if (intel_state.base || intel_state.index) |
i.types[this_operand].bitfield.baseindex = 1; |
|
if (intel_state.seg) |
{ |
for (;;) |
{ |
expP = symbol_get_value_expression (intel_state.seg); |
if (expP->X_op != O_full_ptr) |
break; |
intel_state.seg = expP->X_add_symbol; |
} |
if (expP->X_op != O_register) |
{ |
as_bad (_("segment register name expected")); |
return 0; |
} |
if (!i386_regtab[expP->X_add_number].reg_type.bitfield.sreg2 |
&& !i386_regtab[expP->X_add_number].reg_type.bitfield.sreg3) |
{ |
as_bad (_("invalid use of register")); |
return 0; |
} |
switch (i386_regtab[expP->X_add_number].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; |
case RegFlat: i.seg[i.mem_operands] = NULL; break; |
} |
} |
|
/* Swap base and index in 16-bit memory operands like |
[si+bx]. Since i386_index_check is also used in AT&T |
mode we have to do that here. */ |
if (intel_state.base |
&& intel_state.index |
&& intel_state.base->reg_type.bitfield.reg16 |
&& intel_state.index->reg_type.bitfield.reg16 |
&& intel_state.base->reg_num >= 6 |
&& intel_state.index->reg_num < 6) |
{ |
i.base_reg = intel_state.index; |
i.index_reg = intel_state.base; |
} |
else |
{ |
i.base_reg = intel_state.base; |
i.index_reg = intel_state.index; |
} |
|
if (!i386_index_check (operand_string)) |
return 0; |
|
i.types[this_operand].bitfield.mem = 1; |
++i.mem_operands; |
} |
else |
{ |
/* Immediate. */ |
if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) |
{ |
as_bad (_("at most %d immediate operands are allowed"), |
MAX_IMMEDIATE_OPERANDS); |
return 0; |
} |
|
expP = &im_expressions[i.imm_operands++]; |
i.op[this_operand].imms = expP; |
*expP = exp; |
|
return i386_finalize_immediate (exp_seg, expP, intel_state.reloc_types, |
operand_string); |
} |
|
return 1; |
} |