1 /* Target-dependent code for the i386. 2 3 Copyright (C) 2001-2015 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 3 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, see <http://www.gnu.org/licenses/>. */ 19 20 #ifndef I386_TDEP_H 21 #define I386_TDEP_H 22 23 struct frame_info; 24 struct gdbarch; 25 struct reggroup; 26 struct regset; 27 struct regcache; 28 29 /* GDB's i386 target supports both the 32-bit Intel Architecture 30 (IA-32) and the 64-bit AMD x86-64 architecture. Internally it uses 31 a similar register layout for both. 32 33 - General purpose registers 34 - FPU data registers 35 - FPU control registers 36 - SSE data registers 37 - SSE control register 38 39 The general purpose registers for the x86-64 architecture are quite 40 different from IA-32. Therefore, gdbarch_fp0_regnum 41 determines the register number at which the FPU data registers 42 start. The number of FPU data and control registers is the same 43 for both architectures. The number of SSE registers however, 44 differs and is determined by the num_xmm_regs member of `struct 45 gdbarch_tdep'. */ 46 47 /* Convention for returning structures. */ 48 49 enum struct_return 50 { 51 pcc_struct_return, /* Return "short" structures in memory. */ 52 reg_struct_return /* Return "short" structures in registers. */ 53 }; 54 55 /* i386 architecture specific information. */ 56 struct gdbarch_tdep 57 { 58 /* General-purpose registers. */ 59 int *gregset_reg_offset; 60 int gregset_num_regs; 61 size_t sizeof_gregset; 62 63 /* Floating-point registers. */ 64 size_t sizeof_fpregset; 65 66 /* Register number for %st(0). The register numbers for the other 67 registers follow from this one. Set this to -1 to indicate the 68 absence of an FPU. */ 69 int st0_regnum; 70 71 /* Number of MMX registers. */ 72 int num_mmx_regs; 73 74 /* Register number for %mm0. Set this to -1 to indicate the absence 75 of MMX support. */ 76 int mm0_regnum; 77 78 /* Number of pseudo YMM registers. */ 79 int num_ymm_regs; 80 81 /* Register number for %ymm0. Set this to -1 to indicate the absence 82 of pseudo YMM register support. */ 83 int ymm0_regnum; 84 85 /* Number of AVX512 OpMask registers (K-registers) */ 86 int num_k_regs; 87 88 /* Register number for %k0. Set this to -1 to indicate the absence 89 of AVX512 OpMask register support. */ 90 int k0_regnum; 91 92 /* Number of pseudo ZMM registers ($zmm0-$zmm31). */ 93 int num_zmm_regs; 94 95 /* Register number for %zmm0. Set this to -1 to indicate the absence 96 of pseudo ZMM register support. */ 97 int zmm0_regnum; 98 99 /* Number of byte registers. */ 100 int num_byte_regs; 101 102 /* Register pseudo number for %al. */ 103 int al_regnum; 104 105 /* Number of pseudo word registers. */ 106 int num_word_regs; 107 108 /* Register number for %ax. */ 109 int ax_regnum; 110 111 /* Number of pseudo dword registers. */ 112 int num_dword_regs; 113 114 /* Register number for %eax. Set this to -1 to indicate the absence 115 of pseudo dword register support. */ 116 int eax_regnum; 117 118 /* Number of core registers. */ 119 int num_core_regs; 120 121 /* Number of SSE registers. */ 122 int num_xmm_regs; 123 124 /* Number of SSE registers added in AVX512. */ 125 int num_xmm_avx512_regs; 126 127 /* Register number of XMM16, the first XMM register added in AVX512. */ 128 int xmm16_regnum; 129 130 /* Number of YMM registers added in AVX512. */ 131 int num_ymm_avx512_regs; 132 133 /* Register number of YMM16, the first YMM register added in AVX512. */ 134 int ymm16_regnum; 135 136 /* Bits of the extended control register 0 (the XFEATURE_ENABLED_MASK 137 register), excluding the x87 bit, which are supported by this GDB. */ 138 139 uint64_t xcr0; 140 141 /* Offset of XCR0 in XSAVE extended state. */ 142 int xsave_xcr0_offset; 143 144 /* Register names. */ 145 const char **register_names; 146 147 /* Register number for %ymm0h. Set this to -1 to indicate the absence 148 of upper YMM register support. */ 149 int ymm0h_regnum; 150 151 /* Upper YMM register names. Only used for tdesc_numbered_register. */ 152 const char **ymmh_register_names; 153 154 /* Register number for %ymm16h. Set this to -1 to indicate the absence 155 of support for YMM16-31. */ 156 int ymm16h_regnum; 157 158 /* YMM16-31 register names. Only used for tdesc_numbered_register. */ 159 const char **ymm16h_register_names; 160 161 /* Register number for %bnd0r. Set this to -1 to indicate the absence 162 bound registers. */ 163 int bnd0r_regnum; 164 165 /* Register number for pseudo register %bnd0. Set this to -1 to indicate the absence 166 bound registers. */ 167 int bnd0_regnum; 168 169 /* Register number for %bndcfgu. Set this to -1 to indicate the absence 170 bound control registers. */ 171 int bndcfgu_regnum; 172 173 /* MPX register names. Only used for tdesc_numbered_register. */ 174 const char **mpx_register_names; 175 176 /* Register number for %zmm0h. Set this to -1 to indicate the absence 177 of ZMM_HI256 register support. */ 178 int zmm0h_regnum; 179 180 /* OpMask register names. */ 181 const char **k_register_names; 182 183 /* ZMM register names. Only used for tdesc_numbered_register. */ 184 const char **zmmh_register_names; 185 186 /* XMM16-31 register names. Only used for tdesc_numbered_register. */ 187 const char **xmm_avx512_register_names; 188 189 /* YMM16-31 register names. Only used for tdesc_numbered_register. */ 190 const char **ymm_avx512_register_names; 191 192 /* Target description. */ 193 const struct target_desc *tdesc; 194 195 /* Register group function. */ 196 const void *register_reggroup_p; 197 198 /* Offset of saved PC in jmp_buf. */ 199 int jb_pc_offset; 200 201 /* Convention for returning structures. */ 202 enum struct_return struct_return; 203 204 /* Address range where sigtramp lives. */ 205 CORE_ADDR sigtramp_start; 206 CORE_ADDR sigtramp_end; 207 208 /* Detect sigtramp. */ 209 int (*sigtramp_p) (struct frame_info *); 210 211 /* Get address of sigcontext for sigtramp. */ 212 CORE_ADDR (*sigcontext_addr) (struct frame_info *); 213 214 /* Offset of registers in `struct sigcontext'. */ 215 int *sc_reg_offset; 216 int sc_num_regs; 217 218 /* Offset of saved PC and SP in `struct sigcontext'. Usage of these 219 is deprecated, please use `sc_reg_offset' instead. */ 220 int sc_pc_offset; 221 int sc_sp_offset; 222 223 /* ISA-specific data types. */ 224 struct type *i386_mmx_type; 225 struct type *i386_ymm_type; 226 struct type *i386_zmm_type; 227 struct type *i387_ext_type; 228 struct type *i386_bnd_type; 229 230 /* Process record/replay target. */ 231 /* The map for registers because the AMD64's registers order 232 in GDB is not same as I386 instructions. */ 233 const int *record_regmap; 234 /* Parse intx80 args. */ 235 int (*i386_intx80_record) (struct regcache *regcache); 236 /* Parse sysenter args. */ 237 int (*i386_sysenter_record) (struct regcache *regcache); 238 /* Parse syscall args. */ 239 int (*i386_syscall_record) (struct regcache *regcache); 240 241 /* Regsets. */ 242 const struct regset *fpregset; 243 }; 244 245 /* Floating-point registers. */ 246 247 /* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit 248 (at most) in the FPU, but are zero-extended to 32 bits in GDB's 249 register cache. */ 250 251 /* Return non-zero if REGNUM matches the FP register and the FP 252 register set is active. */ 253 extern int i386_fp_regnum_p (struct gdbarch *, int); 254 extern int i386_fpc_regnum_p (struct gdbarch *, int); 255 256 /* Register numbers of various important registers. */ 257 258 enum i386_regnum 259 { 260 I386_EAX_REGNUM, /* %eax */ 261 I386_ECX_REGNUM, /* %ecx */ 262 I386_EDX_REGNUM, /* %edx */ 263 I386_EBX_REGNUM, /* %ebx */ 264 I386_ESP_REGNUM, /* %esp */ 265 I386_EBP_REGNUM, /* %ebp */ 266 I386_ESI_REGNUM, /* %esi */ 267 I386_EDI_REGNUM, /* %edi */ 268 I386_EIP_REGNUM, /* %eip */ 269 I386_EFLAGS_REGNUM, /* %eflags */ 270 I386_CS_REGNUM, /* %cs */ 271 I386_SS_REGNUM, /* %ss */ 272 I386_DS_REGNUM, /* %ds */ 273 I386_ES_REGNUM, /* %es */ 274 I386_FS_REGNUM, /* %fs */ 275 I386_GS_REGNUM, /* %gs */ 276 I386_ST0_REGNUM, /* %st(0) */ 277 I386_MXCSR_REGNUM = 40, /* %mxcsr */ 278 I386_YMM0H_REGNUM, /* %ymm0h */ 279 I386_YMM7H_REGNUM = I386_YMM0H_REGNUM + 7, 280 I386_BND0R_REGNUM, 281 I386_BND3R_REGNUM = I386_BND0R_REGNUM + 3, 282 I386_BNDCFGU_REGNUM, 283 I386_BNDSTATUS_REGNUM, 284 I386_K0_REGNUM, /* %k0 */ 285 I386_K7_REGNUM = I386_K0_REGNUM + 7, 286 I386_ZMM0H_REGNUM, /* %zmm0h */ 287 I386_ZMM7H_REGNUM = I386_ZMM0H_REGNUM + 7 288 }; 289 290 /* Register numbers of RECORD_REGMAP. */ 291 292 enum record_i386_regnum 293 { 294 X86_RECORD_REAX_REGNUM, 295 X86_RECORD_RECX_REGNUM, 296 X86_RECORD_REDX_REGNUM, 297 X86_RECORD_REBX_REGNUM, 298 X86_RECORD_RESP_REGNUM, 299 X86_RECORD_REBP_REGNUM, 300 X86_RECORD_RESI_REGNUM, 301 X86_RECORD_REDI_REGNUM, 302 X86_RECORD_R8_REGNUM, 303 X86_RECORD_R9_REGNUM, 304 X86_RECORD_R10_REGNUM, 305 X86_RECORD_R11_REGNUM, 306 X86_RECORD_R12_REGNUM, 307 X86_RECORD_R13_REGNUM, 308 X86_RECORD_R14_REGNUM, 309 X86_RECORD_R15_REGNUM, 310 X86_RECORD_REIP_REGNUM, 311 X86_RECORD_EFLAGS_REGNUM, 312 X86_RECORD_CS_REGNUM, 313 X86_RECORD_SS_REGNUM, 314 X86_RECORD_DS_REGNUM, 315 X86_RECORD_ES_REGNUM, 316 X86_RECORD_FS_REGNUM, 317 X86_RECORD_GS_REGNUM, 318 }; 319 320 #define I386_NUM_GREGS 16 321 #define I386_NUM_XREGS 9 322 323 #define I386_SSE_NUM_REGS (I386_MXCSR_REGNUM + 1) 324 #define I386_AVX_NUM_REGS (I386_YMM7H_REGNUM + 1) 325 #define I386_MPX_NUM_REGS (I386_BNDSTATUS_REGNUM + 1) 326 #define I386_AVX512_NUM_REGS (I386_ZMM7H_REGNUM + 1) 327 328 /* Size of the largest register. */ 329 #define I386_MAX_REGISTER_SIZE 64 330 331 /* Types for i386-specific registers. */ 332 extern struct type *i387_ext_type (struct gdbarch *gdbarch); 333 334 /* Checks of different pseudo-registers. */ 335 extern int i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum); 336 extern int i386_word_regnum_p (struct gdbarch *gdbarch, int regnum); 337 extern int i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum); 338 extern int i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum); 339 extern int i386_xmm_avx512_regnum_p (struct gdbarch * gdbarch, int regnum); 340 extern int i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum); 341 extern int i386_ymm_avx512_regnum_p (struct gdbarch *gdbarch, int regnum); 342 extern int i386_bnd_regnum_p (struct gdbarch *gdbarch, int regnum); 343 extern int i386_k_regnum_p (struct gdbarch *gdbarch, int regnum); 344 extern int i386_zmm_regnum_p (struct gdbarch *gdbarch, int regnum); 345 extern int i386_zmmh_regnum_p (struct gdbarch *gdbarch, int regnum); 346 347 extern const char *i386_pseudo_register_name (struct gdbarch *gdbarch, 348 int regnum); 349 extern struct type *i386_pseudo_register_type (struct gdbarch *gdbarch, 350 int regnum); 351 352 extern void i386_pseudo_register_read_into_value (struct gdbarch *gdbarch, 353 struct regcache *regcache, 354 int regnum, 355 struct value *result); 356 357 extern void i386_pseudo_register_write (struct gdbarch *gdbarch, 358 struct regcache *regcache, 359 int regnum, const gdb_byte *buf); 360 361 /* Segment selectors. */ 362 #define I386_SEL_RPL 0x0003 /* Requester's Privilege Level mask. */ 363 #define I386_SEL_UPL 0x0003 /* User Privilige Level. */ 364 #define I386_SEL_KPL 0x0000 /* Kernel Privilige Level. */ 365 366 /* The length of the longest i386 instruction (according to 367 include/asm-i386/kprobes.h in Linux 2.6. */ 368 #define I386_MAX_INSN_LEN (16) 369 370 /* Functions exported from i386-tdep.c. */ 371 extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame, 372 CORE_ADDR pc, char *name); 373 extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch, 374 CORE_ADDR pc); 375 376 /* Return whether the THIS_FRAME corresponds to a sigtramp routine. */ 377 extern int i386_sigtramp_p (struct frame_info *this_frame); 378 379 /* Return non-zero if REGNUM is a member of the specified group. */ 380 extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum, 381 struct reggroup *group); 382 383 /* Supply register REGNUM from the general-purpose register set REGSET 384 to register cache REGCACHE. If REGNUM is -1, do this for all 385 registers in REGSET. */ 386 extern void i386_supply_gregset (const struct regset *regset, 387 struct regcache *regcache, int regnum, 388 const void *gregs, size_t len); 389 390 /* General-purpose register set. */ 391 extern const struct regset i386_gregset; 392 393 /* Floating-point register set. */ 394 extern const struct regset i386_fpregset; 395 396 /* Default iterator over core file register note sections. */ 397 extern void 398 i386_iterate_over_regset_sections (struct gdbarch *gdbarch, 399 iterate_over_regset_sections_cb *cb, 400 void *cb_data, 401 const struct regcache *regcache); 402 403 extern struct displaced_step_closure *i386_displaced_step_copy_insn 404 (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to, 405 struct regcache *regs); 406 extern void i386_displaced_step_fixup (struct gdbarch *gdbarch, 407 struct displaced_step_closure *closure, 408 CORE_ADDR from, CORE_ADDR to, 409 struct regcache *regs); 410 411 /* Initialize a basic ELF architecture variant. */ 412 extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *); 413 414 /* Initialize a SVR4 architecture variant. */ 415 extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *); 416 417 extern int i386_process_record (struct gdbarch *gdbarch, 418 struct regcache *regcache, CORE_ADDR addr); 419 420 421 422 /* Functions and variables exported from i386bsd-tdep.c. */ 423 424 extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *); 425 extern CORE_ADDR i386fbsd_sigtramp_start_addr; 426 extern CORE_ADDR i386fbsd_sigtramp_end_addr; 427 extern CORE_ADDR i386obsd_sigtramp_start_addr; 428 extern CORE_ADDR i386obsd_sigtramp_end_addr; 429 extern int i386fbsd4_sc_reg_offset[]; 430 extern int i386fbsd_sc_reg_offset[]; 431 extern int i386nbsd_sc_reg_offset[]; 432 extern int i386obsd_sc_reg_offset[]; 433 extern int i386bsd_sc_reg_offset[]; 434 435 /* SystemTap related functions. */ 436 437 extern int i386_stap_is_single_operand (struct gdbarch *gdbarch, 438 const char *s); 439 440 extern int i386_stap_parse_special_token (struct gdbarch *gdbarch, 441 struct stap_parse_info *p); 442 443 #endif /* i386-tdep.h */ 444