1 /* Target-dependent code for the i386. 2 3 Copyright 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22 #ifndef I386_TDEP_H 23 #define I386_TDEP_H 24 25 struct frame_info; 26 struct gdbarch; 27 struct reggroup; 28 struct regset; 29 struct regcache; 30 31 /* GDB's i386 target supports both the 32-bit Intel Architecture 32 (IA-32) and the 64-bit AMD x86-64 architecture. Internally it uses 33 a similar register layout for both. 34 35 - General purpose registers 36 - FPU data registers 37 - FPU control registers 38 - SSE data registers 39 - SSE control register 40 41 The general purpose registers for the x86-64 architecture are quite 42 different from IA-32. Therefore, the FP0_REGNUM target macro 43 determines the register number at which the FPU data registers 44 start. The number of FPU data and control registers is the same 45 for both architectures. The number of SSE registers however, 46 differs and is determined by the num_xmm_regs member of `struct 47 gdbarch_tdep'. */ 48 49 /* Convention for returning structures. */ 50 51 enum struct_return 52 { 53 pcc_struct_return, /* Return "short" structures in memory. */ 54 reg_struct_return /* Return "short" structures in registers. */ 55 }; 56 57 /* i386 architecture specific information. */ 58 struct gdbarch_tdep 59 { 60 /* General-purpose registers. */ 61 struct regset *gregset; 62 int *gregset_reg_offset; 63 int gregset_num_regs; 64 size_t sizeof_gregset; 65 66 /* Floating-point registers. */ 67 struct regset *fpregset; 68 size_t sizeof_fpregset; 69 70 /* Register number for %st(0). The register numbers for the other 71 registers follow from this one. Set this to -1 to indicate the 72 absence of an FPU. */ 73 int st0_regnum; 74 75 /* Register number for %mm0. Set this to -1 to indicate the absence 76 of MMX support. */ 77 int mm0_regnum; 78 79 /* Number of SSE registers. */ 80 int num_xmm_regs; 81 82 /* Offset of saved PC in jmp_buf. */ 83 int jb_pc_offset; 84 85 /* Convention for returning structures. */ 86 enum struct_return struct_return; 87 88 /* Address range where sigtramp lives. */ 89 CORE_ADDR sigtramp_start; 90 CORE_ADDR sigtramp_end; 91 92 /* Detect sigtramp. */ 93 int (*sigtramp_p) (struct frame_info *); 94 95 /* Get address of sigcontext for sigtramp. */ 96 CORE_ADDR (*sigcontext_addr) (struct frame_info *); 97 98 /* Offset of registers in `struct sigcontext'. */ 99 int *sc_reg_offset; 100 int sc_num_regs; 101 102 /* Offset of saved PC and SP in `struct sigcontext'. Usage of these 103 is deprecated, please use `sc_reg_offset' instead. */ 104 int sc_pc_offset; 105 int sc_sp_offset; 106 }; 107 108 /* Floating-point registers. */ 109 110 /* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit 111 (at most) in the FPU, but are zero-extended to 32 bits in GDB's 112 register cache. */ 113 114 /* Return non-zero if REGNUM matches the FP register and the FP 115 register set is active. */ 116 extern int i386_fp_regnum_p (int regnum); 117 extern int i386_fpc_regnum_p (int regnum); 118 119 /* Register numbers of various important registers. */ 120 121 enum i386_regnum 122 { 123 I386_EAX_REGNUM, /* %eax */ 124 I386_ECX_REGNUM, /* %ecx */ 125 I386_EDX_REGNUM, /* %edx */ 126 I386_EBX_REGNUM, /* %ebx */ 127 I386_ESP_REGNUM, /* %esp */ 128 I386_EBP_REGNUM, /* %ebp */ 129 I386_ESI_REGNUM, /* %esi */ 130 I386_EDI_REGNUM, /* %edi */ 131 I386_EIP_REGNUM, /* %eip */ 132 I386_EFLAGS_REGNUM, /* %eflags */ 133 I386_CS_REGNUM, /* %cs */ 134 I386_SS_REGNUM, /* %ss */ 135 I386_DS_REGNUM, /* %ds */ 136 I386_ES_REGNUM, /* %es */ 137 I386_FS_REGNUM, /* %fs */ 138 I386_GS_REGNUM, /* %gs */ 139 I386_ST0_REGNUM /* %st(0) */ 140 }; 141 142 #define I386_NUM_GREGS 16 143 #define I386_NUM_FREGS 16 144 #define I386_NUM_XREGS 9 145 146 #define I386_SSE_NUM_REGS (I386_NUM_GREGS + I386_NUM_FREGS \ 147 + I386_NUM_XREGS) 148 149 /* Size of the largest register. */ 150 #define I386_MAX_REGISTER_SIZE 16 151 152 /* Segment selectors. */ 153 #define I386_SEL_RPL 0x0003 /* Requester's Privilege Level mask. */ 154 #define I386_SEL_UPL 0x0003 /* User Privilige Level. */ 155 #define I386_SEL_KPL 0x0000 /* Kernel Privilige Level. */ 156 157 /* Functions exported from i386-tdep.c. */ 158 extern CORE_ADDR i386_pe_skip_trampoline_code (CORE_ADDR pc, char *name); 159 160 /* Return the name of register REGNUM. */ 161 extern char const *i386_register_name (int regnum); 162 163 /* Return non-zero if REGNUM is a member of the specified group. */ 164 extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum, 165 struct reggroup *group); 166 167 /* Supply register REGNUM from the general-purpose register set REGSET 168 to register cache REGCACHE. If REGNUM is -1, do this for all 169 registers in REGSET. */ 170 extern void i386_supply_gregset (const struct regset *regset, 171 struct regcache *regcache, int regnum, 172 const void *gregs, size_t len); 173 174 /* Return the appropriate register set for the core section identified 175 by SECT_NAME and SECT_SIZE. */ 176 extern const struct regset * 177 i386_regset_from_core_section (struct gdbarch *gdbarch, 178 const char *sect_name, size_t sect_size); 179 180 /* Initialize a basic ELF architecture variant. */ 181 extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *); 182 183 /* Initialize a SVR4 architecture variant. */ 184 extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *); 185 186 187 /* Functions and variables exported from i386bsd-tdep.c. */ 188 189 extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *); 190 extern CORE_ADDR i386fbsd_sigtramp_start_addr; 191 extern CORE_ADDR i386fbsd_sigtramp_end_addr; 192 extern CORE_ADDR i386obsd_sigtramp_start_addr; 193 extern CORE_ADDR i386obsd_sigtramp_end_addr; 194 extern int i386fbsd4_sc_reg_offset[]; 195 extern int i386fbsd_sc_reg_offset[]; 196 extern int i386nbsd_sc_reg_offset[]; 197 extern int i386obsd_sc_reg_offset[]; 198 extern int i386bsd_sc_reg_offset[]; 199 200 #endif /* i386-tdep.h */ 201