/* i386.c -- Assemble code for the Intel 80386
- Copyright (C) 1989, 91, 92, 93, 94, 95, 96, 97, 1998
+ Copyright (C) 1989, 91, 92, 93, 94, 95, 96, 97, 98, 1999
Free Software Foundation.
This file is part of GAS, the GNU Assembler.
#define SCALE1_WHEN_NO_INDEX 1
#endif
+#define true 1
+#define false 0
+
static unsigned int mode_from_disp_size PARAMS ((unsigned int));
static int fits_in_signed_byte PARAMS ((long));
static int fits_in_unsigned_byte PARAMS ((long));
static int smallest_imm_type PARAMS ((long));
static int add_prefix PARAMS ((unsigned int));
static void set_16bit_code_flag PARAMS ((int));
+static void set_intel_syntax PARAMS ((int));
+
#ifdef BFD_ASSEMBLER
static bfd_reloc_code_real_type reloc
PARAMS ((int, int, bfd_reloc_code_real_type));
static int flag_16bit_code; /* 1 if we're writing 16-bit code, 0 if 32-bit */
+static int intel_syntax = 0; /* 1 for intel syntax, 0 if att syntax */
+
+static int allow_naked_reg = 0; /* 1 if register prefix % not required */
+
/* Interface to relax_segment.
There are 2 relax states for 386 jump insns: one for conditional &
one for unconditional jumps. This is because the these two types
static char *output_invalid PARAMS ((int c));
static int i386_operand PARAMS ((char *operand_string));
+static int i386_intel_operand PARAMS ((char *operand_string, int got_a_float));
static const reg_entry *parse_register PARAMS ((char *reg_string,
char **end_op));
+
#ifndef I386COFF
static void s_bss PARAMS ((int));
#endif
flag_16bit_code = new_16bit_code_flag;
}
+static void
+set_intel_syntax (syntax_flag)
+ int syntax_flag;
+{
+ /* Find out if register prefixing is specified. */
+ int ask_naked_reg = 0;
+
+ SKIP_WHITESPACE ();
+ if (! is_end_of_line[(unsigned char) *input_line_pointer])
+ {
+ char *string = input_line_pointer;
+ int e = get_symbol_end ();
+
+ if (strcmp(string, "prefix") == 0)
+ ask_naked_reg = 1;
+ else if (strcmp(string, "noprefix") == 0)
+ ask_naked_reg = -1;
+ else
+ as_bad (_("Bad argument to syntax directive."));
+ *input_line_pointer = e;
+ }
+ demand_empty_rest_of_line ();
+
+ intel_syntax = syntax_flag;
+
+ if (ask_naked_reg == 0)
+ {
+#ifdef BFD_ASSEMBLER
+ allow_naked_reg = (intel_syntax
+ && (bfd_get_symbol_leading_char (stdoutput) != '\0'));
+#else
+ allow_naked_reg = 0; /* conservative default */
+#endif
+ }
+ else
+ allow_naked_reg = (ask_naked_reg < 0);
+}
+
const pseudo_typeS md_pseudo_table[] =
{
#ifndef I386COFF
{"optim", s_ignore, 0},
{"code16", set_16bit_code_flag, 1},
{"code32", set_16bit_code_flag, 0},
+ {"intel_syntax", set_intel_syntax, 1},
+ {"att_syntax", set_intel_syntax, 0},
{0, 0, 0}
};
}
#ifdef BFD_ASSEMBLER
+static bfd_reloc_code_real_type reloc
+ PARAMS ((int, int, bfd_reloc_code_real_type));
+
static bfd_reloc_code_real_type
reloc (size, pcrel, other)
int size;
#define BFD_RELOC_386_GOTOFF 0
#endif
+int
+intel_float_operand (mnemonic)
+ char *mnemonic;
+{
+ if (mnemonic[0] == 'f' && mnemonic[1] =='i')
+ return 0;
+
+ if (mnemonic[0] == 'f')
+ return 1;
+
+ return 0;
+}
+
/* This is the guts of the machine-dependent assembler. LINE points to a
machine dependent instruction. This function is supposed to emit
the frags/bytes it assembles to. */
int j;
+ char mnemonic[MAX_MNEM_SIZE];
+
/* Initialize globals. */
memset (&i, '\0', sizeof (i));
for (j = 0; j < MAX_OPERANDS; j++)
We assume that the scrubber has arranged it so that line[0] is the valid
start of a (possibly prefixed) mnemonic. */
{
- char mnemonic[MAX_MNEM_SIZE];
char *l = line;
char *token_start = l;
char *mnem_p;
i.suffix = mnem_p[-1];
mnem_p[-1] = '\0';
current_templates = hash_find (op_hash, mnemonic);
+ break;
+
+ /* Intel Syntax */
+ case INTEL_DWORD_MNEM_SUFFIX:
+ if (intel_syntax)
+ {
+ i.suffix = mnem_p[-1];
+ mnem_p[-1] = '\0';
+ current_templates = hash_find (op_hash, mnemonic);
+ break;
+ }
}
if (!current_templates)
{
{
if (paren_not_balanced)
{
- as_bad (_("unbalanced parenthesis in operand %d."),
- i.operands + 1);
+ if (!intel_syntax)
+ as_bad (_("unbalanced parenthesis in operand %d."),
+ i.operands + 1);
+ else
+ as_bad (_("unbalanced brackets in operand %d."),
+ i.operands + 1);
return;
}
else
i.operands + 1);
return;
}
- if (*l == '(')
- ++paren_not_balanced;
- if (*l == ')')
- --paren_not_balanced;
+ if (!intel_syntax)
+ {
+ if (*l == '(')
+ ++paren_not_balanced;
+ if (*l == ')')
+ --paren_not_balanced;
+ }
+ else
+ {
+ if (*l == '[')
+ ++paren_not_balanced;
+ if (*l == ']')
+ --paren_not_balanced;
+ }
l++;
}
if (l != token_start)
}
/* now parse operand adding info to 'i' as we go along */
END_STRING_AND_SAVE (l);
- operand_ok = i386_operand (token_start);
+
+ if (intel_syntax)
+ 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 */
if (!operand_ok)
return;
unsigned int found_reverse_match;
int suffix_check;
+ /* All intel opcodes have reversed operands except for BOUND and ENTER */
+ if (intel_syntax
+ && (strcmp (mnemonic, "enter") != 0)
+ && (strcmp (mnemonic, "bound") != 0)
+ && (strncmp (mnemonic, "fsub", 4) !=0)
+ && (strncmp (mnemonic, "fdiv", 4) !=0))
+ {
+ const reg_entry *temp_reg;
+ expressionS *temp_disp;
+ expressionS *temp_imm;
+ unsigned int temp_type;
+ int xchg1, xchg2;
+
+ if (i.operands == 2)
+ {
+ xchg1 = 0;
+ xchg2 = 1;
+ }
+ else if (i.operands == 3)
+ {
+ xchg1 = 0;
+ xchg2 = 2;
+ }
+
+ if (i.operands > 1)
+ {
+ temp_type = i.types[xchg2];
+ if (temp_type & (Reg | FloatReg))
+ temp_reg = i.regs[xchg2];
+ else if (temp_type & Imm)
+ temp_imm = i.imms[xchg2];
+ else if (temp_type & Disp)
+ temp_disp = i.disps[xchg2];
+
+ i.types[xchg2] = i.types[xchg1];
+
+ if (i.types[xchg1] & (Reg | FloatReg))
+ {
+ i.regs[xchg2] = i.regs[xchg1];
+ i.regs[xchg1] = NULL;
+ }
+ else if (i.types[xchg2] & Imm)
+ {
+ i.imms[xchg2] = i.imms[xchg1];
+ i.imms[xchg1] = NULL;
+ }
+ else if (i.types[xchg2] & Disp)
+ {
+ i.disps[xchg2] = i.disps[xchg1];
+ i.disps[xchg1] = NULL;
+ }
+
+ if (temp_type & (Reg | FloatReg))
+ {
+ i.regs[xchg1] = temp_reg;
+ if (! (i.types[xchg1] & (Reg | FloatReg)))
+ i.regs[xchg2] = NULL;
+ }
+ else if (temp_type & Imm)
+ {
+ i.imms[xchg1] = temp_imm;
+ if (! (i.types[xchg1] & Imm))
+ i.imms[xchg2] = NULL;
+ }
+ else if (temp_type & Disp)
+ {
+ i.disps[xchg1] = temp_disp;
+ if (! (i.types[xchg1] & Disp))
+ i.disps[xchg2] = NULL;
+ }
+
+ i.types[xchg1] = temp_type;
+ }
+ if (!strcmp(mnemonic,"jmp")
+ || !strcmp (mnemonic, "call"))
+ if ((i.types[0] & Reg) || i.types[0] & BaseIndex)
+ i.types[0] |= JumpAbsolute;
+
+ }
overlap0 = 0;
overlap1 = 0;
overlap2 = 0;
? No_wSuf
: (i.suffix == SHORT_MNEM_SUFFIX
? No_sSuf
- : (i.suffix == LONG_MNEM_SUFFIX ? No_lSuf : 0))));
+ : (i.suffix == LONG_MNEM_SUFFIX
+ ? No_lSuf
+ : (i.suffix == INTEL_DWORD_MNEM_SUFFIX
+ ? No_dSuf
+ : (i.suffix == LONG_DOUBLE_MNEM_SUFFIX ? No_xSuf : 0))))));
for (t = current_templates->start;
t < current_templates->end;
t++)
{
- /* Must have right number of operands, and must not have
- disallowed suffix. */
- if (i.operands != t->operands || (t->opcode_modifier & suffix_check))
+ /* Must have right number of operands. */
+ if (i.operands != t->operands)
continue;
+
+ /* For some opcodes, don't check the suffix */
+ if (intel_syntax)
+ {
+ if (strcmp (t->name, "fnstcw")
+ && strcmp (t->name, "fldcw")
+ && (t->opcode_modifier & suffix_check))
+ continue;
+ }
+ /* Must not have disallowed suffix. */
+ else if ((t->opcode_modifier & suffix_check))
+ continue;
+
else if (!t->operands)
break; /* 0 operands always matches */
|| !CONSISTENT_REGISTER_MATCH (overlap1, i.types[1],
t->operand_types[1],
overlap2, i.types[2],
- t->operand_types[2]))
- continue;
+ t->operand_types[2]))
+
+ continue;
}
/* found either forward/reverse 2 or 3 operand match here:
slip through to break */
i.tm.operand_types[1] = t->operand_types[0];
}
+
if (i.tm.opcode_modifier & FWait)
if (! add_prefix (FWAIT_OPCODE))
return;
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. */
+ if (intel_syntax
+ && (i.tm.base_opcode == 0xfb7
+ || i.tm.base_opcode == 0xfb6
+ || i.tm.base_opcode == 0xfbe
+ || i.tm.base_opcode == 0xfbf))
+ continue;
+
if ((i.types[op] & WordReg) && i.regs[op]->reg_num < 4
#if 0
/* Check that the template allows eight bit regs
return;
}
+ /* 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)
+ {
+ unsigned int prefix = DATA_PREFIX_OPCODE;
+
+ if ((i.regs[1]->reg_type & Reg16) != 0)
+ if (!add_prefix (prefix))
+ return;
+ }
+
if (i.suffix && i.suffix != BYTE_MNEM_SUFFIX)
{
/* It's not a byte, select word/dword operation. */
/* Now select between word & dword operations via the operand
size prefix, except for instructions that will ignore this
prefix anyway. */
- if ((i.suffix == DWORD_MNEM_SUFFIX
+ if (((intel_syntax && (i.suffix == INTEL_DWORD_MNEM_SUFFIX))
+ || i.suffix == DWORD_MNEM_SUFFIX
|| i.suffix == LONG_MNEM_SUFFIX) == flag_16bit_code
&& !(i.tm.opcode_modifier & IgnoreSize))
{
return;
}
/* Size floating point instruction. */
- if (i.suffix == LONG_MNEM_SUFFIX)
+ if (i.suffix == LONG_MNEM_SUFFIX
+ || (intel_syntax && i.suffix == INTEL_DWORD_MNEM_SUFFIX))
{
if (i.tm.opcode_modifier & FloatMF)
i.tm.base_opcode ^= 4;
}
+
+ if (intel_syntax && i.suffix == LONG_DOUBLE_MNEM_SUFFIX)
+ {
+ if (i.tm.opcode_modifier & FloatMF)
+ i.tm.base_opcode ^= 2;
+ }
}
if (i.tm.base_opcode == AMD_3DNOW_OPCODE)
if (flag_16bit_code)
code16 ^= CODE16;
- if (i.prefixes != 0)
+ if (!intel_syntax && (i.prefixes != 0))
as_warn (_("skipping prefixes on this instruction"));
if (i.disps[0]->X_op == O_constant)
size = 2;
}
- if (i.prefixes != 0)
+ if (!intel_syntax && (i.prefixes != 0))
as_warn (_("skipping prefixes on this instruction"));
if (fits_in_unsigned_byte (i.tm.base_opcode))
reloc_type = BFD_RELOC_16;
}
- if (i.prefixes != 0)
+ if (!intel_syntax && (i.prefixes != 0))
as_warn (_("skipping prefixes on this instruction"));
insn_size += prefix + 1 + 2 + size; /* 1 opcode; 2 segment; offset */
}
}
\f
+static int i386_is_reg PARAMS ((char *));
+
+static int
+i386_is_reg (reg_string)
+ char *reg_string;
+{
+ register char *s = reg_string;
+ register char *p;
+ char reg_name_given[MAX_REG_NAME_SIZE + 1];
+
+ if (is_space_char (*s))
+ ++s;
+
+ p = reg_name_given;
+ while ((*p++ = register_chars[(unsigned char) *s++]) != '\0')
+ if (p >= reg_name_given + MAX_REG_NAME_SIZE)
+ return 0;
+
+ if (!hash_find (reg_hash, reg_name_given))
+ return 0;
+ else
+ return 1;
+}
+
+static int i386_immediate PARAMS ((char *));
+
+static int
+i386_immediate (imm_start)
+ char *imm_start;
+{
+ char *save_input_line_pointer;
+ segT exp_seg = 0;
+ expressionS * exp;
+
+ if (i.imm_operands == MAX_IMMEDIATE_OPERANDS)
+ {
+ as_bad (_ ("only 1 or 2 immediate operands are allowed"));
+ return 0;
+ }
+
+ exp = &im_expressions[i.imm_operands++];
+ i.imms[this_operand] = exp;
+
+ if (is_space_char (*imm_start))
+ ++imm_start;
+
+ save_input_line_pointer = input_line_pointer;
+ input_line_pointer = imm_start;
+ exp_seg = expression (exp);
+
+ input_line_pointer = save_input_line_pointer;
+
+ if (exp->X_op == O_absent)
+ {
+ /* 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;
+ exp->X_add_number = 0;
+ exp->X_add_symbol = (symbolS *) 0;
+ exp->X_op_symbol = (symbolS *) 0;
+ i.types[this_operand] |= Imm;
+ }
+ else if (exp->X_op == O_constant)
+ {
+ i.types[this_operand] |=
+ smallest_imm_type ((long) exp->X_add_number);
+
+ /* If a suffix is given, this operand may be shortended. */
+ switch (i.suffix)
+ {
+ case WORD_MNEM_SUFFIX:
+ i.types[this_operand] |= Imm16;
+ break;
+ case BYTE_MNEM_SUFFIX:
+ i.types[this_operand] |= Imm16 | Imm8 | Imm8S;
+ break;
+ }
+ }
+#ifdef OBJ_AOUT
+ else if (exp_seg != text_section
+ && exp_seg != data_section
+ && exp_seg != bss_section
+ && exp_seg != undefined_section
+#ifdef BFD_ASSEMBLER
+ && !bfd_is_com_section (exp_seg)
+#endif
+ )
+ {
+ seg_unimplemented:
+ as_bad (_ ("Unimplemented segment type %d in operand"), exp_seg);
+ return 0;
+ }
+#endif
+ else
+ {
+ /* This is an address. The size of the address will be
+ determined later, depending on destination register,
+ suffix, or the default for the section. We exclude
+ Imm8S here so that `push $foo' and other instructions
+ with an Imm8S form will use Imm16 or Imm32. */
+ i.types[this_operand] |= (Imm8 | Imm16 | Imm32);
+ }
+
+ return 1;
+
+}
+
+static int i386_scale PARAMS ((char *));
+
+static int
+i386_scale (scale)
+ char *scale;
+{
+ if (!isdigit (*scale))
+ goto bad_scale;
+
+ switch (*scale)
+ {
+ case '0':
+ 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:
+ bad_scale:
+ as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
+ scale);
+ return 0;
+ }
+ if (i.log2_scale_factor != 0 && ! i.index_reg)
+ {
+ as_warn (_("scale factor of %d without an index register"),
+ 1 << i.log2_scale_factor);
+#if SCALE1_WHEN_NO_INDEX
+ i.log2_scale_factor = 0;
+#endif
+ }
+}
+
+static int i386_displacement PARAMS ((char *, char *));
+
+static int
+i386_displacement (disp_start, disp_end)
+ char *disp_start;
+ char *disp_end;
+{
+ register expressionS *exp;
+ segT exp_seg = 0;
+ char *save_input_line_pointer;
+ int bigdisp = Disp32;
+
+ /* All of the pieces of the displacement expression are handled together. */
+ if (intel_syntax && i.disp_operands != 0)
+ return 1;
+
+ if (flag_16bit_code ^ (i.prefix[ADDR_PREFIX] != 0))
+ bigdisp = Disp16;
+ i.types[this_operand] |= bigdisp;
+
+ exp = &disp_expressions[i.disp_operands];
+ i.disps[this_operand] = exp;
+ i.disp_reloc[this_operand] = NO_RELOC;
+ i.disp_operands++;
+ save_input_line_pointer = input_line_pointer;
+ input_line_pointer = disp_start;
+ END_STRING_AND_SAVE (disp_end);
+
+#ifndef GCC_ASM_O_HACK
+#define GCC_ASM_O_HACK 0
+#endif
+#if GCC_ASM_O_HACK
+ END_STRING_AND_SAVE (disp_end + 1);
+ if ((i.types[this_operand] & BaseIndex) != 0
+ && displacement_string_end[-1] == '+')
+ {
+ /* This hack is to avoid a warning when using the "o"
+ constraint within gcc asm statements.
+ For instance:
+
+ #define _set_tssldt_desc(n,addr,limit,type) \
+ __asm__ __volatile__ ( \
+ "movw %w2,%0\n\t" \
+ "movw %w1,2+%0\n\t" \
+ "rorl $16,%1\n\t" \
+ "movb %b1,4+%0\n\t" \
+ "movb %4,5+%0\n\t" \
+ "movb $0,6+%0\n\t" \
+ "movb %h1,7+%0\n\t" \
+ "rorl $16,%1" \
+ : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
+
+ This works great except that the output assembler ends
+ up looking a bit weird if it turns out that there is
+ no offset. You end up producing code that looks like:
+
+ #APP
+ movw $235,(%eax)
+ movw %dx,2+(%eax)
+ rorl $16,%edx
+ movb %dl,4+(%eax)
+ movb $137,5+(%eax)
+ movb $0,6+(%eax)
+ movb %dh,7+(%eax)
+ rorl $16,%edx
+ #NO_APP
+
+ 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...
+ */
+ register char *cp;
+
+ cp = strchr (input_line_pointer, '@');
+ if (cp != NULL)
+ {
+ char *tmpbuf;
+
+ if (GOT_symbol == NULL)
+ GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
+
+ tmpbuf = (char *) alloca ((cp - input_line_pointer) + 20);
+
+ if (strncmp (cp + 1, "PLT", 3) == 0)
+ {
+ i.disp_reloc[this_operand] = BFD_RELOC_386_PLT32;
+ *cp = '\0';
+ strcpy (tmpbuf, input_line_pointer);
+ strcat (tmpbuf, cp + 1 + 3);
+ *cp = '@';
+ }
+ else if (strncmp (cp + 1, "GOTOFF", 6) == 0)
+ {
+ i.disp_reloc[this_operand] = BFD_RELOC_386_GOTOFF;
+ *cp = '\0';
+ strcpy (tmpbuf, input_line_pointer);
+ strcat (tmpbuf, cp + 1 + 6);
+ *cp = '@';
+ }
+ else if (strncmp (cp + 1, "GOT", 3) == 0)
+ {
+ i.disp_reloc[this_operand] = BFD_RELOC_386_GOT32;
+ *cp = '\0';
+ strcpy (tmpbuf, input_line_pointer);
+ strcat (tmpbuf, cp + 1 + 3);
+ *cp = '@';
+ }
+ else
+ as_bad (_("Bad reloc specifier `%s' in expression"), cp + 1);
+
+ /* GOT relocations are not supported in 16 bit mode */
+ if (flag_16bit_code)
+ as_bad (_("GOT relocations not supported in 16 bit mode"));
+
+ input_line_pointer = tmpbuf;
+ }
+ }
+#endif
+
+ exp_seg = expression (exp);
+
+#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 */
+ if (i.disp_reloc[this_operand] == BFD_RELOC_386_GOTOFF)
+ {
+ if (S_IS_LOCAL(exp->X_add_symbol)
+ && S_GET_SEGMENT (exp->X_add_symbol) != undefined_section)
+ section_symbol(exp->X_add_symbol->bsym->section);
+ assert (exp->X_op == O_symbol);
+ exp->X_op = O_subtract;
+ exp->X_op_symbol = GOT_symbol;
+ i.disp_reloc[this_operand] = BFD_RELOC_32;
+ }
+#endif
+
+ if (*input_line_pointer)
+ as_bad (_("Ignoring junk `%s' after expression"),
+ input_line_pointer);
+#if GCC_ASM_O_HACK
+ RESTORE_END_STRING (disp_end + 1);
+#endif
+ RESTORE_END_STRING (disp_end);
+ input_line_pointer = save_input_line_pointer;
+
+ if (exp->X_op == O_constant)
+ {
+ if (fits_in_signed_byte (exp->X_add_number))
+ i.types[this_operand] |= Disp8;
+ }
+#ifdef OBJ_AOUT
+ else if (exp_seg != text_section
+ && exp_seg != data_section
+ && exp_seg != bss_section
+ && exp_seg != undefined_section)
+ {
+ as_bad (_ ("Unimplemented segment type %d in operand"), exp_seg);
+ return 0;
+ }
+#endif
+ 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))
+ {
+ i.suffix = WORD_MNEM_SUFFIX;
+ *op_string += 8;
+ return WORD_PTR;
+ }
+
+ else if (!strncasecmp (*op_string, "DWORD PTR", 9))
+ {
+ if (got_a_float)
+ i.suffix = SHORT_MNEM_SUFFIX;
+ else
+ i.suffix = DWORD_MNEM_SUFFIX;
+ *op_string += 9;
+ return DWORD_PTR;
+ }
+
+ else if (!strncasecmp (*op_string, "QWORD PTR", 9))
+ {
+ i.suffix = INTEL_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_disp2;
+
+ 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')
+ {
+ 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 && i386_is_reg (temp_disp)))
+ {
+ 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_intel_memory_operand PARAMS ((char *));
+
+static int
+i386_intel_memory_operand (op_string)
+ char *op_string;
+{
+
+ char *end_of_operand_string;
+
+ if (is_digit_char (*op_string)
+ && strchr (op_string, '[') == 0)
+ {
+ if (!i386_immediate (op_string))
+ return 0;
+ else
+ return 1;
+ }
+
+ /* Look for displacement preceding open bracket */
+ if (*op_string != '[')
+ {
+ char *end_seg;
+ char *temp_string;
+
+ end_seg = strchr (op_string, ':');
+ if (end_seg)
+ {
+ if (!i386_parse_seg (op_string))
+ return 0;
+ op_string = end_seg + 1;
+ }
+
+ temp_string = build_displacement_string (true, op_string);
+ if (!i386_displacement (temp_string, temp_string + strlen (temp_string)))
+ return 0;
+
+ 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;
+ }
+
+ if (*op_string == '[')
+ {
+ ++op_string;
+
+ /* Pick off each component and figure out where it belongs */
+
+ end_of_operand_string = op_string;
+
+ while (*op_string != ']')
+ {
+
+ while (*end_of_operand_string != '+'
+ && *end_of_operand_string != '-'
+ && *end_of_operand_string != '*'
+ && *end_of_operand_string != ']')
+ end_of_operand_string++;
+
+ if (*op_string == '+')
+ {
+ char *temp_string = op_string + 1;
+ if (is_space_char (*temp_string))
+ ++temp_string;
+ if (*temp_string == REGISTER_PREFIX
+ || allow_naked_reg && i386_is_reg (temp_string))
+ ++op_string;
+ }
+
+ if (*op_string == REGISTER_PREFIX
+ || allow_naked_reg && i386_is_reg (op_string))
+ {
+ const reg_entry *temp_reg;
+ char *end_op;
+
+ END_STRING_AND_SAVE (end_of_operand_string);
+ temp_reg = parse_register (op_string, &end_op);
+ RESTORE_END_STRING (end_of_operand_string);
+
+ if (temp_reg == NULL)
+ return 0;
+
+ if (i.base_reg == NULL)
+ i.base_reg = temp_reg;
+ else
+ i.index_reg = temp_reg;
+
+ i.types[this_operand] |= BaseIndex;
+
+ }
+ else if (is_digit_char (*op_string) || *op_string == '+' || *op_string == '-')
+ {
+
+ char *temp_string = build_displacement_string (false, op_string);
+
+ if (*temp_string == '+')
+ ++temp_string;
+
+ if (!i386_displacement (temp_string, temp_string + strlen (temp_string)))
+ return 0;
+
+ ++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 == '*')
+ {
+ ++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;
+ }
+ op_string = end_of_operand_string;
+ ++end_of_operand_string;
+ }
+ }
+
+ return 1;
+}
+
+static int i386_intel_operand PARAMS ((char *, int));
+
+static int
+i386_intel_operand (operand_string, got_a_float)
+ char *operand_string;
+ int got_a_float;
+{
+ char *op_string = operand_string;
+ char *end_of_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 ((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;
+ }
+
+ if (!i386_intel_memory_operand (op_string))
+ return 0;
+
+ i.mem_operands++;
+ break;
+
+ case SHORT:
+
+ case FLAT:
+
+ case OFFSET_FLAT:
+ if (!i386_immediate (op_string))
+ return 0;
+ break;
+
+ 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
+ && i386_is_reg (op_string)))
+ {
+
+ register const reg_entry * r;
+ char *end_op;
+
+ r = parse_register (op_string, &end_op);
+ if (r == NULL)
+ return 0;
+
+ /* 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.regs[this_operand] = r;
+ i.reg_operands++;
+ }
+
+ else
+ {
+
+ if (!i386_intel_memory_operand (op_string))
+ return 0;
+
+ i.mem_operands++;
+ }
+ break;
+
+ } /* end switch */
+ /* Special case for (%dx) while doing input/output op. */
+ if (i.base_reg
+ && i.base_reg->reg_type == (Reg16 | InOutPortReg)
+ && i.index_reg == 0
+ && i.log2_scale_factor == 0
+ && i.seg[i.mem_operands] == 0
+ && (i.types[this_operand] & Disp) == 0)
+ {
+ i.types[this_operand] = InOutPortReg;
+ return 1;
+ }
+ /* Make sure the memory operand we've been dealt is valid. */
+ if (flag_16bit_code ^ (i.prefix[ADDR_PREFIX] != 0))
+ {
+ if ((i.base_reg
+ && ((i.base_reg->reg_type & (Reg16|BaseIndex))
+ != (Reg16|BaseIndex)))
+ || (i.index_reg
+ && (((i.index_reg->reg_type & (Reg16|BaseIndex))
+ != (Reg16|BaseIndex))
+ || ! (i.base_reg
+ && i.base_reg->reg_num < 6
+ && i.index_reg->reg_num >= 6
+ && i.log2_scale_factor == 0))))
+ {
+ as_bad (_("`%s' is not a valid %s bit base/index expression"),
+ operand_string, "16");
+ return 0;
+ }
+ }
+ else
+ {
+ if ((i.base_reg
+ && (i.base_reg->reg_type & Reg32) == 0)
+ || (i.index_reg
+ && ((i.index_reg->reg_type & (Reg32|BaseIndex))
+ != (Reg32|BaseIndex))))
+ {
+ as_bad (_("`%s' is not a valid %s bit base/index expression"),
+ operand_string, "32");
+ return 0;
+ }
+ }
+ return 1;
+}
+
/* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
on error. */
+static int i386_operand PARAMS ((char *));
+
static int
i386_operand (operand_string)
char *operand_string;
{
- register char *op_string = operand_string;
+ 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'. */
{
++op_string;
if (is_space_char (*op_string))
- ++op_string;
+ ++op_string;
i.types[this_operand] |= JumpAbsolute;
}
/* Check if operand is a register. */
- if (*op_string == REGISTER_PREFIX)
+ if (*op_string == REGISTER_PREFIX
+ || (allow_naked_reg && i386_is_reg (op_string)))
{
register const reg_entry *r;
char *end_op;
r = parse_register (op_string, &end_op);
if (r == NULL)
- return 0;
+ return 0;
+
/* Check for a segment override by searching for ':' after a
segment register. */
op_string = end_op;
if (is_space_char (*op_string))
- ++op_string;
+ ++op_string;
if (*op_string == ':' && (r->reg_type & (SReg2 | SReg3)))
- {
- switch (r->reg_num)
- {
- case 0:
+ {
+ switch (r->reg_num)
+ {
+ case 0:
i.seg[i.mem_operands] = &es;
break;
case 1:
}
else if (*op_string == IMMEDIATE_PREFIX)
{ /* ... or an immediate */
- char *save_input_line_pointer;
- segT exp_seg = 0;
- expressionS *exp;
-
- if (i.imm_operands == MAX_IMMEDIATE_OPERANDS)
- {
- as_bad (_("only 1 or 2 immediate operands are allowed"));
- return 0;
- }
-
- exp = &im_expressions[i.imm_operands++];
- i.imms[this_operand] = exp;
-
++op_string;
- if (is_space_char (*op_string))
- ++op_string;
-
- save_input_line_pointer = input_line_pointer;
- input_line_pointer = op_string;
- exp_seg = expression (exp);
- if (*input_line_pointer != '\0')
- {
- /* This should be as_bad, but some versions of gcc, up to
- about 2.8 and egcs 1.01, generate a bogus @GOTOFF(%ebx)
- in certain cases. Oddly, the code in question turns out
- to work correctly anyhow, so we make this just a warning
- until those versions of gcc are obsolete. */
- as_warn (_("unrecognized characters `%s' in expression"),
- input_line_pointer);
- }
- input_line_pointer = save_input_line_pointer;
-
- if (exp->X_op == O_absent)
- {
- /* missing or bad expr becomes absolute 0 */
- as_bad (_("missing or invalid immediate expression `%s' taken as 0"),
- operand_string);
- exp->X_op = O_constant;
- exp->X_add_number = 0;
- exp->X_add_symbol = (symbolS *) 0;
- exp->X_op_symbol = (symbolS *) 0;
- i.types[this_operand] |= Imm;
- }
- else if (exp->X_op == O_constant)
- {
- i.types[this_operand] |=
- smallest_imm_type ((long) exp->X_add_number);
-
- /* If a suffix is given, this operand may be shortened. */
- switch (i.suffix)
- {
- case WORD_MNEM_SUFFIX:
- i.types[this_operand] |= Imm16;
- break;
- case BYTE_MNEM_SUFFIX:
- i.types[this_operand] |= Imm16 | Imm8 | Imm8S;
- break;
- }
- }
-#ifdef OBJ_AOUT
- else if (exp_seg != text_section
- && exp_seg != data_section
- && exp_seg != bss_section
- && exp_seg != undefined_section
-#ifdef BFD_ASSEMBLER
- && ! bfd_is_com_section (exp_seg)
-#endif
- )
- {
- seg_unimplemented:
- as_bad (_("Unimplemented segment type %d in operand"), exp_seg);
- return 0;
- }
-#endif
- else
- {
- /* This is an address. The size of the address will be
- determined later, depending on destination register,
- suffix, or the default for the section. We exclude
- Imm8S here so that `push $foo' and other instructions
- with an Imm8S form will use Imm16 or Imm32. */
- i.types[this_operand] |= (Imm8 | Imm16 | Imm32);
- }
+ if (!i386_immediate (op_string))
+ return 0;
}
- else if (is_digit_char (*op_string) || is_identifier_char (*op_string)
- || *op_string == '(')
+ else if (is_digit_char (*op_string)
+ || is_identifier_char (*op_string)
+ || *op_string == '(' )
{
/* This is a memory reference of some sort. */
char *end_of_operand_string;
register char *base_string;
int found_base_index_form;
+ int operand_modifier;
/* Start and end of displacement string expression (if found). */
char *displacement_string_start;
char *displacement_string_end;
do_memory_reference:
+
if ((i.mem_operands == 1
&& (current_templates->start->opcode_modifier & IsString) == 0)
|| i.mem_operands == 2)
--end_of_operand_string;
base_string = end_of_operand_string;
+
if (*base_string == ')')
{
unsigned int parens_balanced = 1;
if (is_space_char (*base_string))
++base_string;
- if (*base_string == REGISTER_PREFIX || *base_string == ',')
+ if (*base_string == REGISTER_PREFIX
+ || (allow_naked_reg && i386_is_reg (base_string))
+ || *base_string == ',')
found_base_index_form = 1;
}
if (is_space_char (*base_string))
++base_string;
- if (*base_string == REGISTER_PREFIX)
+ if (*base_string == REGISTER_PREFIX
+ || allow_naked_reg && i386_is_reg (base_string))
{
char *end_op;
if (is_space_char (*base_string))
++base_string;
}
- else if (*base_string != ')')
+ else if (*base_string != ')' )
{
as_bad (_("expecting `,' or `)' after index register in `%s'"),
operand_string);
/* Check for scale factor. */
if (isdigit ((unsigned char) *base_string))
{
- if (isdigit ((unsigned char) base_string[1]))
- goto bad_scale; /* must be 1 digit scale */
- switch (*base_string)
- {
- 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:
- bad_scale:
- as_bad (_("expecting scale factor of 1, 2, 4 or 8; got `%s'"),
- base_string);
- return 0;
- }
+ if (!i386_scale (base_string))
+ return 0;
++base_string;
if (is_space_char (*base_string))
operand_string);
return 0;
}
- if (i.log2_scale_factor != 0 && ! i.index_reg)
- {
- as_warn (_("scale factor of %d without an index register"),
- 1 << i.log2_scale_factor);
-#if SCALE1_WHEN_NO_INDEX
- i.log2_scale_factor = 0;
-#endif
- }
}
else if (!i.index_reg)
{
}
}
- /* If there's an expression begining the operand, parse it,
+ /* If there's an expression beginning the operand, parse it,
assuming displacement_string_start and
displacement_string_end are meaningful. */
if (displacement_string_start != displacement_string_end)
{
- register expressionS *exp;
- segT exp_seg = 0;
- char *save_input_line_pointer;
- int bigdisp = Disp32;
-
- if (flag_16bit_code ^ (i.prefix[ADDR_PREFIX] != 0))
- bigdisp = Disp16;
- i.types[this_operand] |= bigdisp;
-
- exp = &disp_expressions[i.disp_operands];
- i.disps[this_operand] = exp;
- i.disp_reloc[this_operand] = NO_RELOC;
- i.disp_operands++;
- save_input_line_pointer = input_line_pointer;
- input_line_pointer = displacement_string_start;
- END_STRING_AND_SAVE (displacement_string_end);
-#ifndef GCC_ASM_O_HACK
-#define GCC_ASM_O_HACK 0
-#endif
-#if GCC_ASM_O_HACK
- END_STRING_AND_SAVE (displacement_string_end + 1);
- if ((i.types[this_operand] & BaseIndex) != 0
- && displacement_string_end[-1] == '+')
- {
- /* This hack is to avoid a warning when using the "o"
- constraint within gcc asm statements.
- For instance:
-
- #define _set_tssldt_desc(n,addr,limit,type) \
- __asm__ __volatile__ ( \
- "movw %w2,%0\n\t" \
- "movw %w1,2+%0\n\t" \
- "rorl $16,%1\n\t" \
- "movb %b1,4+%0\n\t" \
- "movb %4,5+%0\n\t" \
- "movb $0,6+%0\n\t" \
- "movb %h1,7+%0\n\t" \
- "rorl $16,%1" \
- : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
-
- This works great except that the output assembler ends
- up looking a bit weird if it turns out that there is
- no offset. You end up producing code that looks like:
-
- #APP
- movw $235,(%eax)
- movw %dx,2+(%eax)
- rorl $16,%edx
- movb %dl,4+(%eax)
- movb $137,5+(%eax)
- movb $0,6+(%eax)
- movb %dh,7+(%eax)
- rorl $16,%edx
- #NO_APP
-
- 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...
- */
- register char *cp;
-
- cp = strchr (input_line_pointer, '@');
- if (cp != NULL)
- {
- char *tmpbuf;
-
- if (GOT_symbol == NULL)
- GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
-
- tmpbuf = (char *) alloca ((cp - input_line_pointer) + 20);
-
- if (strncmp (cp + 1, "PLT", 3) == 0)
- {
- i.disp_reloc[this_operand] = BFD_RELOC_386_PLT32;
- *cp = '\0';
- strcpy (tmpbuf, input_line_pointer);
- strcat (tmpbuf, cp + 1 + 3);
- *cp = '@';
- }
- else if (strncmp (cp + 1, "GOTOFF", 6) == 0)
- {
- i.disp_reloc[this_operand] = BFD_RELOC_386_GOTOFF;
- *cp = '\0';
- strcpy (tmpbuf, input_line_pointer);
- strcat (tmpbuf, cp + 1 + 6);
- *cp = '@';
- }
- else if (strncmp (cp + 1, "GOT", 3) == 0)
- {
- i.disp_reloc[this_operand] = BFD_RELOC_386_GOT32;
- *cp = '\0';
- strcpy (tmpbuf, input_line_pointer);
- strcat (tmpbuf, cp + 1 + 3);
- *cp = '@';
- }
- else
- as_bad (_("Bad reloc specifier `%s' in expression"), cp + 1);
-
- /* GOT relocations are not supported in 16 bit mode */
- if (flag_16bit_code)
- as_bad (_("GOT relocations not supported in 16 bit mode"));
-
- input_line_pointer = tmpbuf;
- }
- }
-#endif
-
- exp_seg = expression (exp);
-
-#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 */
- if (i.disp_reloc[this_operand] == BFD_RELOC_386_GOTOFF)
- {
- if (S_IS_LOCAL(exp->X_add_symbol)
- && S_GET_SEGMENT (exp->X_add_symbol) != undefined_section)
- section_symbol(exp->X_add_symbol->bsym->section);
- assert (exp->X_op == O_symbol);
- exp->X_op = O_subtract;
- exp->X_op_symbol = GOT_symbol;
- i.disp_reloc[this_operand] = BFD_RELOC_32;
- }
-#endif
-
- if (*input_line_pointer)
- as_bad (_("Ignoring junk `%s' after expression"),
- input_line_pointer);
-#if GCC_ASM_O_HACK
- RESTORE_END_STRING (displacement_string_end + 1);
-#endif
- RESTORE_END_STRING (displacement_string_end);
- input_line_pointer = save_input_line_pointer;
-
-#if 0 /* this is handled in expr. */
- if (exp->X_op == O_absent)
- {
- /* missing expr becomes absolute 0 */
- as_bad (_("missing or invalid displacement `%s' taken as 0"),
- operand_string);
- exp->X_op = O_constant;
- exp->X_add_number = 0;
- exp->X_add_symbol = (symbolS *) 0;
- exp->X_op_symbol = (symbolS *) 0;
- i.types[this_operand] |= Disp8;
- }
- else
-#endif
- if (exp->X_op == O_constant)
- {
- if (fits_in_signed_byte (exp->X_add_number))
- i.types[this_operand] |= Disp8;
- }
-#ifdef OBJ_AOUT
- else if (exp_seg != text_section
- && exp_seg != data_section
- && exp_seg != bss_section
- && exp_seg != undefined_section)
- {
- goto seg_unimplemented;
- }
-#endif
+ if (!i386_displacement (displacement_string_start,
+ displacement_string_end))
+ return 0;
}
/* Special case for (%dx) while doing input/output op. */
}
else
{ /* it's not a memory operand; argh! */
- as_bad (_("invalid char %s begining operand %d `%s'"),
+ as_bad (_("invalid char %s beginning operand %d `%s'"),
output_invalid (*op_string),
this_operand + 1,
op_string);
\f
char output_invalid_buf[8];
+static char * output_invalid PARAMS ((int));
+
static char *
output_invalid (c)
- char c;
+ int c;
{
if (isprint (c))
sprintf (output_invalid_buf, "'%c'", c);
/* REG_STRING starts *before* REGISTER_PREFIX. */
+static const reg_entry * parse_register PARAMS ((char *, char **));
+
static const reg_entry *
parse_register (reg_string, end_op)
char *reg_string;
char reg_name_given[MAX_REG_NAME_SIZE + 1];
const reg_entry *r;
- /* Skip REGISTER_PREFIX and possible whitespace. */
- ++s;
+ /* Skip possible REGISTER_PREFIX and possible whitespace. */
+ if (*s == REGISTER_PREFIX)
+ ++s;
+
if (is_space_char (*s))
++s;
{
if (p >= reg_name_given + MAX_REG_NAME_SIZE)
{
- *p = '\0';
- as_bad (_("bad register name `%s'"), reg_name_given);
+ if (!allow_naked_reg)
+ {
+ *p = '\0';
+ as_bad (_("bad register name `%s'"), reg_name_given);
+ }
return (const reg_entry *) NULL;
}
}
if (r == NULL)
{
- as_bad (_("bad register name `%s'"), reg_name_given);
+ if (!allow_naked_reg)
+ as_bad (_("bad register name `%s'"), reg_name_given);
return (const reg_entry *) NULL;
}
projects / binutils-gdb.git / commitdiff