diff options
Diffstat (limited to 'binutils-2.25/gas/config/tc-i386-intel.c')
| -rw-r--r-- | binutils-2.25/gas/config/tc-i386-intel.c | 1005 |
1 files changed, 1005 insertions, 0 deletions
diff --git a/binutils-2.25/gas/config/tc-i386-intel.c b/binutils-2.25/gas/config/tc-i386-intel.c new file mode 100644 index 00000000..e534110f --- /dev/null +++ b/binutils-2.25/gas/config/tc-i386-intel.c @@ -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); + + 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 + || current_templates->start->base_opcode == 0xf30f1b /* bndmk */ + || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */ + || 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; +} |