/* tc-i386.h -- Header file for tc-i386.c
- Copyright (C) 1989, 92, 93, 94, 95, 96, 1997 Free Software Foundation.
+ Copyright (C) 1989, 92, 93, 94, 95, 96, 97, 1998 Free Software Foundation.
This file is part of GAS, the GNU Assembler.
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 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 \
+ && ((FIX)->fx_addsy == NULL \
+ || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
+ && ! S_IS_WEAK ((FIX)->fx_addsy) \
+ && S_IS_DEFINED ((FIX)->fx_addsy) \
+ && ! S_IS_COMMON ((FIX)->fx_addsy))))
#define TARGET_ARCH bfd_arch_i386
#ifndef BFD_ASSEMBLER
#ifndef OBJ_AOUT
#ifndef TE_PE
+#ifndef TE_GO32
/* Local labels starts with .L */
#define LOCAL_LABEL(name) (name[0] == '.' \
&& (name[1] == 'L' || name[1] == 'X' || name[1] == '.'))
#endif
#endif
#endif
+#endif
#define LOCAL_LABELS_FB 1
#define tc_headers_hook(a) {;} /* not used */
#define MAX_OPERANDS 3 /* max operands per insn */
-#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) */
+#define MAX_IMMEDIATE_OPERANDS 2/* max immediates per insn (lcall, ljmp) */
+#define MAX_MEMORY_OPERANDS 2 /* max memory refs per insn (string ops) */
+
+/* Prefixes will be emitted in the order defined below.
+ WAIT_PREFIX must be the first prefix since FWAIT is really is an
+ instruction, and so must come before any prefixes. */
+#define WAIT_PREFIX 0
+#define LOCKREP_PREFIX 1
+#define ADDR_PREFIX 2
+#define DATA_PREFIX 3
+#define SEG_PREFIX 4
+#define MAX_PREFIXES 5 /* max prefixes per opcode */
/* we define the syntax here (modulo base,index,scale syntax) */
#define REGISTER_PREFIX '%'
Operands are classified so that we can match given operand types with
the opcode table in i386-opcode.h.
*/
-#define Unknown 0x0
/* register */
-#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 WordReg (Reg16|Reg32) /* for push/pop operands */
+#define Reg8 0x1 /* 8 bit reg */
+#define Reg16 0x2 /* 16 bit reg */
+#define Reg32 0x4 /* 32 bit reg */
/* 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 ImmUnknown Imm32 /* for unknown expressions */
-#define Imm (Imm8|Imm8S|Imm16|Imm32) /* gen'l 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 */
/* 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 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 WordMem (Mem16|Mem32|Disp|BaseIndex)
-#define ByteMem (Mem8|Disp|BaseIndex)
+#define BaseIndex 0x100
+/* Disp8,16,32 are used in different ways, depending on the
+ instruction. For jumps, they specify the size of the PC relative
+ displacement, for baseindex type instructions, they specify the
+ size of the offset relative to the base register, and for memory
+ offset instructions such as `mov 1234,%al' they specify the size of
+ the offset relative to the segment base. */
+#define Disp8 0x200 /* 8 bit displacement */
+#define Disp16 0x400 /* 16 bit displacement */
+#define Disp32 0x800 /* 32 bit displacement */
+/* Mem8,16,32 are used to limit the allowed sizes of memory operands */
+#define Mem8 0x1000
+#define Mem16 0x2000
+#define Mem32 0x4000
/* specials */
-#define InOutPortReg 0x10000 /* register to hold in/out port addr = dx */
-#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 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 ImplicitRegister (InOutPortReg|ShiftCount|Acc|FloatAcc)
+#define InOutPortReg 0x10000 /* register to hold in/out port addr = dx */
+#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 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 JumpAbsolute 0x4000000
-#define Abs8 0x08000000
-#define Abs16 0x10000000
-#define Abs32 0x20000000
-#define Abs (Abs8|Abs16|Abs32)
+#define Abs8 0x8000000
+#define Abs16 0x10000000
+#define Abs32 0x20000000
+#define RegMMX 0x40000000 /* MMX register */
+#define EsSeg 0x80000000 /* String insn operand with fixed es segment */
+
+#define Reg (Reg8|Reg16|Reg32) /* gen'l register */
+#define WordReg (Reg16|Reg32)
+#define Imm (Imm8|Imm8S|Imm16|Imm32) /* gen'l immediate */
+#define Disp (Disp8|Disp16|Disp32) /* General displacement */
+#define Mem (Mem8|Mem16|Mem32|Disp|BaseIndex) /* General memory */
+#define WordMem (Mem16|Mem32|Disp|BaseIndex)
+#define ByteMem (Mem8|Disp|BaseIndex)
+#define ImplicitRegister (InOutPortReg|ShiftCount|Acc|FloatAcc)
+#define Abs (Abs8|Abs16|Abs32)
#define Byte (Reg8|Imm8|Imm8S)
#define Word (Reg16|Imm16)
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 */
-#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 Seg2ShortForm 0x40 /* encoding of load segment reg insns */
-#define Seg3ShortForm 0x80 /* fs/gs segment register insns. */
-#define Jump 0x100 /* special case for jump insns. */
+#define W 0x1 /* set if operands can be words or dwords
+ encoded the canonical way: MUST BE 0x1 */
+#define D 0x2 /* D = 0 if Reg --> Regmem;
+ D = 1 if Regmem --> Reg: MUST BE 0x2 */
+#define Modrm 0x4
+#define ReverseRegRegmem 0x8
+#define ShortForm 0x10 /* register is in low 3 bits of opcode */
+#define ShortFormW 0x20 /* ShortForm and W bit is 0x8 */
+#define Seg2ShortForm 0x40 /* encoding of load segment reg insns */
+#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 */
-#define DONT_USE 0x400
-#define NoModrm 0x800
-#define Modrm 0x1000
-#define imulKludge 0x2000
-#define JumpByte 0x4000
-#define JumpDword 0x8000
-#define ReverseRegRegmem 0x10000
-#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)
+#define FloatD 0x400 /* direction for float insns: MUST BE 0x400 */
+#define JumpByte 0x800
+#define JumpDword 0x1000
+#define FWait 0x2000 /* instruction needs FWAIT */
+#define Data16 0x4000 /* needs data prefix if in 32-bit mode */
+#define Data32 0x8000 /* needs data prefix if in 16-bit mode */
+#define IsString 0x100000 /* quick test for string instructions */
+#define regKludge 0x200000 /* fake an extra reg operand for clr, imul */
+
+#define DW (D|W) /* shorthand */
/* (opcode_modifier & COMES_IN_BOTH_DIRECTIONS) indicates that the
source and destination operands can be reversed by setting either
extern int flag_16bit_code;
+#ifdef BFD_ASSEMBLER
+#define md_maybe_text() \
+ ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0)
+#else
+#define md_maybe_text() \
+ (now_seg != data_section && now_seg != bss_section)
+#endif
+
#define md_do_align(n, fill, len, max, around) \
if ((n) && !need_pass_2 \
&& (!(fill) || ((char)*(fill) == (char)0x90 && (len) == 1)) \
- && now_seg != data_section && now_seg != bss_section) \
+ && md_maybe_text ()) \
{ \
char *p; \
p = frag_var (rs_align_code, 15, 1, (relax_substateT) max, \
extern void sco_id PARAMS ((void));
#endif
+#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
+
/* end of tc-i386.h */
projects / deliverable / binutils-gdb.git / blobdiff