-/* i386.h -- Header file for i386.c
- Copyright (C) 1989, Free Software Foundation.
-
+/* tc-i386.h -- Header file for tc-i386.c
+ Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation.
+
This file is part of GAS, the GNU Assembler.
-
+
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-
+
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+#ifndef TC_I386
#define TC_I386 1
+#ifdef TE_LYNX
+#define TARGET_FORMAT "coff-i386-lynx"
+#endif
+
+#ifdef BFD_ASSEMBLER
+/* This is used to determine relocation types in tc-i386.c. The first
+ parameter is the current relocation type, the second one is the desired
+ type. The idea is that if the original type is already some kind of PIC
+ relocation, we leave it alone, otherwise we give it the desired type */
+
+#define TC_RELOC(X,Y) (((X) != BFD_RELOC_386_PLT32 && \
+ (X) != BFD_RELOC_386_GOTOFF && \
+ (X) != BFD_RELOC_386_GOT32 && \
+ (X) != BFD_RELOC_386_GOTPC) ? Y : X)
+
+#define tc_fix_adjustable(X) tc_i386_fix_adjustable(X)
+
+/* This is the relocation type for direct references to GLOBAL_OFFSET_TABLE.
+ * It comes up in complicated expressions such as
+ * _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed normally with
+ * the regular expressions. The fixup specified here when used at runtime
+ * implies that we should add the address of the GOT to the specified location,
+ * and as a result we have simplified the expression into something we can use.
+ */
+#define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_386_GOTPC
+
+/* This expression evaluates to false if the relocation is for a local object
+ for which we still want to do the relocation at runtime. True if we
+ are willing to perform this relocation while building the .o file.
+ This is only used for pcrel relocations, so GOTOFF does not need to be
+ checked here. I am not sure if some of the others are ever used with
+ pcrel, but it is easier to be safe than sorry. */
+
+#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
+ ((FIX)->fx_r_type != BFD_RELOC_386_PLT32 \
+ && (FIX)->fx_r_type != BFD_RELOC_386_GOT32 \
+ && (FIX)->fx_r_type != BFD_RELOC_386_GOTPC)
+
+#define TARGET_ARCH bfd_arch_i386
+#define TARGET_BYTES_BIG_ENDIAN 0
+
+#ifdef OBJ_AOUT
+#ifdef TE_NetBSD
+#define TARGET_FORMAT "a.out-i386-netbsd"
+#endif
+#ifdef TE_386BSD
+#define TARGET_FORMAT "a.out-i386-bsd"
+#endif
+#ifdef TE_LINUX
+#define TARGET_FORMAT "a.out-i386-linux"
+#endif
+#ifdef TE_Mach
+#define TARGET_FORMAT "a.out-mach3"
+#endif
+#ifndef TARGET_FORMAT
+#define TARGET_FORMAT "a.out-i386"
+#endif
+#endif /* OBJ_AOUT */
+
+#ifdef OBJ_ELF
+#define TARGET_FORMAT "elf32-i386"
+#endif
+
+#else /* ! BFD_ASSEMBLER */
+
+/* COFF STUFF */
+
+#define COFF_MAGIC I386MAGIC
+#define BFD_ARCH bfd_arch_i386
+#define COFF_FLAGS F_AR32WR
+#define TC_COUNT_RELOC(x) ((x)->fx_addsy /* ||(x)->fx_subsy||(x)->fx_offset */)
+#define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP)
+extern short tc_coff_fix2rtype ();
+#define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
+extern int tc_coff_sizemachdep PARAMS ((fragS *frag));
+#define SUB_SEGMENT_ALIGN(SEG) 2
+
+/* Need this for PIC relocations */
+#define NEED_FX_R_TYPE
+
#define AOUT_MACHTYPE 100
-#define REVERSE_SORT_RELOCS
+#undef REVERSE_SORT_RELOCS
+
+#endif /* ! BFD_ASSEMBLER */
+
+#ifdef BFD_ASSEMBLER
+#define NO_RELOC BFD_RELOC_NONE
+#else
+#define NO_RELOC 0
+#endif
+#define tc_coff_symbol_emit_hook(a) ; /* not used */
+
+#ifndef OBJ_AOUT
+/* Local labels starts with .L */
+#define LOCAL_LABEL(name) (name[0] == '.' \
+ && (name[1] == 'L' || name[1] == 'X' || name[1] == '.'))
+#define FAKE_LABEL_NAME ".L0\001"
+#endif
+#define LOCAL_LABELS_FB 1
+
+#define tc_aout_pre_write_hook(x) {;} /* not used */
+#define tc_crawl_symbol_chain(a) {;} /* not used */
+#define tc_headers_hook(a) {;} /* not used */
-#define tc_crawl_symbol_chain(a) ; /* not used */
-#define tc_headers_hook(a) ; /* not used */
-
#define MAX_OPERANDS 3 /* max operands per insn */
-#define MAX_PREFIXES 4 /* max prefixes per opcode */
-#define MAX_IMMEDIATE_OPERANDS 2 /* max immediates per insn */
-#define MAX_MEMORY_OPERANDS 2 /* max memory ref per insn
- * lcall uses 2
- */
- /* we define the syntax here (modulo base,index,scale syntax) */
+#define MAX_PREFIXES 5 /* max prefixes per opcode */
+#define MAX_IMMEDIATE_OPERANDS 2/* max immediates per insn */
+#define MAX_MEMORY_OPERANDS 2 /* max memory ref per insn (lcall uses 2) */
+
+/* we define the syntax here (modulo base,index,scale syntax) */
#define REGISTER_PREFIX '%'
#define IMMEDIATE_PREFIX '$'
#define ABSOLUTE_PREFIX '*'
#define PREFIX_SEPERATOR '/'
-
+
#define TWO_BYTE_OPCODE_ESCAPE 0x0f
-
- /* register numbers */
+#define NOP_OPCODE (char) 0x90
+
+/* register numbers */
#define EBP_REG_NUM 5
#define ESP_REG_NUM 4
-
- /* modrm_byte.regmem for twobyte escape */
+
+/* modrm_byte.regmem for twobyte escape */
#define ESCAPE_TO_TWO_BYTE_ADDRESSING ESP_REG_NUM
- /* index_base_byte.index for no index register addressing */
+/* index_base_byte.index for no index register addressing */
#define NO_INDEX_REGISTER ESP_REG_NUM
- /* index_base_byte.base for no base register addressing */
+/* index_base_byte.base for no base register addressing */
#define NO_BASE_REGISTER EBP_REG_NUM
-
- /* these are the att as opcode suffixes, making movl --> mov, for example */
+
+/* these are the att as opcode suffixes, making movl --> mov, for example */
#define DWORD_OPCODE_SUFFIX 'l'
#define WORD_OPCODE_SUFFIX 'w'
#define BYTE_OPCODE_SUFFIX 'b'
-
- /* modrm.mode = REGMEM_FIELD_HAS_REG when a register is in there */
-#define REGMEM_FIELD_HAS_REG 0x3 /* always = 0x3 */
+
+/* modrm.mode = REGMEM_FIELD_HAS_REG when a register is in there */
+#define REGMEM_FIELD_HAS_REG 0x3/* always = 0x3 */
#define REGMEM_FIELD_HAS_MEM (~REGMEM_FIELD_HAS_REG)
#define END_OF_INSN '\0'
#define Reg8 0x1 /* 8 bit reg */
#define Reg16 0x2 /* 16 bit reg */
#define Reg32 0x4 /* 32 bit reg */
-#define Reg (Reg8|Reg16|Reg32) /* gen'l register */
+#define Reg (Reg8|Reg16|Reg32) /* gen'l register */
#define WordReg (Reg16|Reg32) /* for push/pop operands */
/* immediate */
#define Imm8 0x8 /* 8 bit immediate */
#define Imm8S 0x10 /* 8 bit immediate sign extended */
#define Imm16 0x20 /* 16 bit immediate */
#define Imm32 0x40 /* 32 bit immediate */
-#define Imm1 0x80 /* 1 bit immediate */
+#define Imm1 0x80 /* 1 bit immediate */
#define ImmUnknown Imm32 /* for unknown expressions */
-#define Imm (Imm8|Imm8S|Imm16|Imm32) /* gen'l immediate */
+#define Imm (Imm8|Imm8S|Imm16|Imm32) /* gen'l immediate */
/* memory */
#define Disp8 0x200 /* 8 bit displacement (for jumps) */
#define Disp16 0x400 /* 16 bit displacement */
#define Disp32 0x800 /* 32 bit displacement */
-#define Disp (Disp8|Disp16|Disp32) /* General displacement */
+#define Disp (Disp8|Disp16|Disp32) /* General displacement */
#define DispUnknown Disp32 /* for unknown size displacements */
#define Mem8 0x1000
#define Mem16 0x2000
#define Mem32 0x4000
#define BaseIndex 0x8000
-#define Mem (Disp|Mem8|Mem16|Mem32|BaseIndex) /* General memory */
+#define Mem (Disp|Mem8|Mem16|Mem32|BaseIndex) /* General memory */
#define WordMem (Mem16|Mem32|Disp|BaseIndex)
#define ByteMem (Mem8|Disp|BaseIndex)
/* specials */
#define ShiftCount 0x20000 /* register to hold shift cound = cl */
#define Control 0x40000 /* Control register */
#define Debug 0x80000 /* Debug register */
-#define Test 0x100000 /* Test register */
+#define Test 0x100000 /* Test register */
#define FloatReg 0x200000 /* Float register */
#define FloatAcc 0x400000 /* Float stack top %st(0) */
-#define SReg2 0x800000 /* 2 bit segment register */
-#define SReg3 0x1000000 /* 3 bit segment register */
-#define Acc 0x2000000 /* Accumulator %al or %ax or %eax */
+#define SReg2 0x800000 /* 2 bit segment register */
+#define SReg3 0x1000000 /* 3 bit segment register */
+#define Acc 0x2000000 /* Accumulator %al or %ax or %eax */
#define ImplicitRegister (InOutPortReg|ShiftCount|Acc|FloatAcc)
#define JumpAbsolute 0x4000000
#define Abs8 0x08000000
#define Abs32 0x20000000
#define Abs (Abs8|Abs16|Abs32)
-#define MODE_FROM_DISP_SIZE(t) \
- ((t&(Disp8)) ? 1 : \
- ((t&(Disp32)) ? 2 : 0))
-
#define Byte (Reg8|Imm8|Imm8S)
#define Word (Reg16|Imm16)
#define DWord (Reg32|Imm32)
-/* convert opcode suffix ('b' 'w' 'l' typically) into type specifyer */
-#define OPCODE_SUFFIX_TO_TYPE(s) \
- (s == BYTE_OPCODE_SUFFIX ? Byte : \
- (s == WORD_OPCODE_SUFFIX ? Word : DWord))
+#define SMALLEST_DISP_TYPE(num) \
+ fits_in_signed_byte(num) ? (Disp8|Disp32|Abs8|Abs32) : (Disp32|Abs32)
+
+typedef struct
+{
+ /* instruction name sans width suffix ("mov" for movl insns) */
+ char *name;
-#define FITS_IN_SIGNED_BYTE(num) ((num) >= -128 && (num) <= 127)
-#define FITS_IN_UNSIGNED_BYTE(num) ((num) >= 0 && (num) <= 255)
-#define FITS_IN_UNSIGNED_WORD(num) ((num) >= 0 && (num) <= 65535)
-#define FITS_IN_SIGNED_WORD(num) ((num) >= -32768 && (num) <= 32767)
+ /* how many operands */
+ unsigned int operands;
-#define SMALLEST_DISP_TYPE(num) \
- FITS_IN_SIGNED_BYTE(num) ? (Disp8|Disp32|Abs8|Abs32) : (Disp32|Abs32)
-
-#define SMALLEST_IMM_TYPE(num) \
- (num == 1) ? (Imm1|Imm8|Imm8S|Imm16|Imm32): \
- FITS_IN_SIGNED_BYTE(num) ? (Imm8S|Imm8|Imm16|Imm32) : \
- FITS_IN_UNSIGNED_BYTE(num) ? (Imm8|Imm16|Imm32): \
- (FITS_IN_SIGNED_WORD(num)||FITS_IN_UNSIGNED_WORD(num)) ? (Imm16|Imm32) : \
- (Imm32)
-
-typedef struct {
- /* instruction name sans width suffix ("mov" for movl insns) */
- char *name;
-
- /* how many operands */
- unsigned int operands;
-
- /* base_opcode is the fundamental opcode byte with a optional prefix(es). */
- unsigned int base_opcode;
-
- /* extension_opcode is the 3 bit extension for group <n> insns.
- If this template has no extension opcode (the usual case) use None */
- unsigned char extension_opcode;
+ /* base_opcode is the fundamental opcode byte with a optional prefix(es). */
+ unsigned int base_opcode;
+
+ /* extension_opcode is the 3 bit extension for group <n> insns.
+ If this template has no extension opcode (the usual case) use None */
+ unsigned char extension_opcode;
#define None 0xff /* If no extension_opcode is possible. */
-
- /* the bits in opcode_modifier are used to generate the final opcode from
- the base_opcode. These bits also are used to detect alternate forms of
- the same instruction */
- unsigned int opcode_modifier;
-
- /* opcode_modifier bits: */
-#define W 0x1 /* set if operands are words or dwords */
-#define D 0x2 /* D = 0 if Reg --> Regmem; D = 1 if Regmem --> Reg */
- /* direction flag for floating insns: MUST BE 0x400 */
+
+ /* the bits in opcode_modifier are used to generate the final opcode from
+ the base_opcode. These bits also are used to detect alternate forms of
+ the same instruction */
+ unsigned int opcode_modifier;
+
+ /* opcode_modifier bits: */
+#define W 0x1 /* set if operands are words or dwords */
+#define D 0x2 /* D = 0 if Reg --> Regmem; D = 1 if Regmem --> Reg */
+ /* direction flag for floating insns: MUST BE 0x400 */
#define FloatD 0x400
- /* shorthand */
+ /* shorthand */
#define DW (D|W)
#define ShortForm 0x10 /* register is in low 3 bits of opcode */
#define ShortFormW 0x20 /* ShortForm and W bit is 0x8 */
#define Seg3ShortForm 0x80 /* fs/gs segment register insns. */
#define Jump 0x100 /* special case for jump insns. */
#define JumpInterSegment 0x200 /* special case for intersegment leaps/calls */
- /* 0x400 CANNOT BE USED since it's already used by FloatD above */
+ /* 0x400 CANNOT BE USED since it's already used by FloatD above */
#define DONT_USE 0x400
#define NoModrm 0x800
#define Modrm 0x1000
#define JumpByte 0x4000
#define JumpDword 0x8000
#define ReverseRegRegmem 0x10000
-
- /* (opcode_modifier & COMES_IN_ALL_SIZES) is true if the
- instuction comes in byte, word, and dword sizes and is encoded into
- machine code in the canonical way. */
+#define Data16 0x20000 /* needs data prefix if in 32-bit mode */
+#define Data32 0x40000 /* needs data prefix if in 16-bit mode */
+
+ /* (opcode_modifier & COMES_IN_ALL_SIZES) is true if the
+ instuction comes in byte, word, and dword sizes and is encoded into
+ machine code in the canonical way. */
#define COMES_IN_ALL_SIZES (W)
-
- /* (opcode_modifier & COMES_IN_BOTH_DIRECTIONS) indicates that the
- source and destination operands can be reversed by setting either
- the D (for integer insns) or the FloatD (for floating insns) bit
- in base_opcode. */
+
+ /* (opcode_modifier & COMES_IN_BOTH_DIRECTIONS) indicates that the
+ source and destination operands can be reversed by setting either
+ the D (for integer insns) or the FloatD (for floating insns) bit
+ in base_opcode. */
#define COMES_IN_BOTH_DIRECTIONS (D|FloatD)
-
- /* operand_types[i] describes the type of operand i. This is made
- by OR'ing together all of the possible type masks. (e.g.
- 'operand_types[i] = Reg|Imm' specifies that operand i can be
- either a register or an immediate operand */
- unsigned int operand_types[3];
-} template;
+
+ /* operand_types[i] describes the type of operand i. This is made
+ by OR'ing together all of the possible type masks. (e.g.
+ 'operand_types[i] = Reg|Imm' specifies that operand i can be
+ either a register or an immediate operand */
+ unsigned int operand_types[3];
+}
+template;
/*
'templates' is for grouping together 'template' structures for opcodes
The templates themselves start at START and range up to (but not including)
END.
*/
-typedef struct {
- template *start;
- template *end;
-} templates;
+typedef struct
+ {
+ template *start;
+ template *end;
+ } templates;
/* these are for register name --> number & type hash lookup */
-typedef struct {
- char * reg_name;
- unsigned int reg_type;
- unsigned int reg_num;
-} reg_entry;
+typedef struct
+ {
+ char *reg_name;
+ unsigned int reg_type;
+ unsigned int reg_num;
+ }
+
+reg_entry;
-typedef struct {
- char * seg_name;
- unsigned int seg_prefix;
-} seg_entry;
+typedef struct
+ {
+ char *seg_name;
+ unsigned int seg_prefix;
+ }
+
+seg_entry;
/* these are for prefix name --> prefix code hash lookup */
-typedef struct {
- char * prefix_name;
- unsigned char prefix_code;
-} prefix_entry;
+typedef struct
+ {
+ char *prefix_name;
+ unsigned char prefix_code;
+ }
+
+prefix_entry;
/* 386 operand encoding bytes: see 386 book for details of this. */
-typedef struct {
- unsigned regmem:3; /* codes register or memory operand */
- unsigned reg:3; /* codes register operand (or extended opcode) */
- unsigned mode:2; /* how to interpret regmem & reg */
-} modrm_byte;
+typedef struct
+ {
+ unsigned regmem:3; /* codes register or memory operand */
+ unsigned reg:3; /* codes register operand (or extended opcode) */
+ unsigned mode:2; /* how to interpret regmem & reg */
+ }
+
+modrm_byte;
/* 386 opcode byte to code indirect addressing. */
-typedef struct {
- unsigned base:3;
- unsigned index:3;
- unsigned scale:2;
-} base_index_byte;
+typedef struct
+ {
+ unsigned base:3;
+ unsigned index:3;
+ unsigned scale:2;
+ }
+
+base_index_byte;
+
+/* The name of the global offset table generated by the compiler. Allow
+ this to be overridden if need be. */
+#ifndef GLOBAL_OFFSET_TABLE_NAME
+#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
+#endif
+
+#ifdef BFD_ASSEMBLER
+void i386_validate_fix ();
+#define TC_VALIDATE_FIX(FIXP,SEGTYPE,SKIP) i386_validate_fix(FIXP)
+#endif
+
+#endif /* TC_I386 */
+
+#define md_operand(x)
+
+extern const struct relax_type md_relax_table[];
+#define TC_GENERIC_RELAX_TABLE md_relax_table
/* end of tc-i386.h */
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