gdb/i386-tdep.h

   1 /* Target-dependent code for the i386.
   2
   3    Copyright (C) 2001-2014 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   struct regset *gregset;
  60   int *gregset_reg_offset;
  61   int gregset_num_regs;
  62   size_t sizeof_gregset;
  63
  64   /* Floating-point registers.  */
  65   struct regset *fpregset;
  66   size_t sizeof_fpregset;
  67
  68   /* XSAVE extended state.  */
  69   struct regset *xstateregset;
  70
  71   /* Register number for %st(0).  The register numbers for the other
  72      registers follow from this one.  Set this to -1 to indicate the
  73      absence of an FPU.  */
  74   int st0_regnum;
  75
  76   /* Number of MMX registers.  */
  77   int num_mmx_regs;
  78
  79   /* Register number for %mm0.  Set this to -1 to indicate the absence
  80      of MMX support.  */
  81   int mm0_regnum;
  82
  83   /* Number of pseudo YMM registers.  */
  84   int num_ymm_regs;
  85
  86   /* Register number for %ymm0.  Set this to -1 to indicate the absence
  87      of pseudo YMM register support.  */
  88   int ymm0_regnum;
  89
  90   /* Number of AVX512 OpMask registers (K-registers)  */
  91   int num_k_regs;
  92
  93   /* Register number for %k0.  Set this to -1 to indicate the absence
  94      of AVX512 OpMask register support.  */
  95   int k0_regnum;
  96
  97   /* Number of pseudo ZMM registers ($zmm0-$zmm31).  */
  98   int num_zmm_regs;
  99
 100   /* Register number for %zmm0.  Set this to -1 to indicate the absence
 101      of pseudo ZMM register support.  */
 102   int zmm0_regnum;
 103
 104   /* Number of byte registers.  */
 105   int num_byte_regs;
 106
 107   /* Register pseudo number for %al.  */
 108   int al_regnum;
 109
 110   /* Number of pseudo word registers.  */
 111   int num_word_regs;
 112
 113   /* Register number for %ax.  */
 114   int ax_regnum;
 115
 116   /* Number of pseudo dword registers.  */
 117   int num_dword_regs;
 118
 119   /* Register number for %eax.  Set this to -1 to indicate the absence
 120      of pseudo dword register support.  */
 121   int eax_regnum;
 122
 123   /* Number of core registers.  */
 124   int num_core_regs;
 125
 126   /* Number of SSE registers.  */
 127   int num_xmm_regs;
 128
 129   /* Number of SSE registers added in AVX512.  */
 130   int num_xmm_avx512_regs;
 131
 132   /* Register number of XMM16, the first XMM register added in AVX512.  */
 133   int xmm16_regnum;
 134
 135   /* Number of YMM registers added in AVX512.  */
 136   int num_ymm_avx512_regs;
 137
 138   /* Register number of YMM16, the first YMM register added in AVX512.  */
 139   int ymm16_regnum;
 140
 141   /* Bits of the extended control register 0 (the XFEATURE_ENABLED_MASK
 142      register), excluding the x87 bit, which are supported by this GDB.  */
 143
 144   uint64_t xcr0;
 145
 146   /* Offset of XCR0 in XSAVE extended state.  */
 147   int xsave_xcr0_offset;
 148
 149   /* Register names.  */
 150   const char **register_names;
 151
 152   /* Register number for %ymm0h.  Set this to -1 to indicate the absence
 153      of upper YMM register support.  */
 154   int ymm0h_regnum;
 155
 156   /* Upper YMM register names.  Only used for tdesc_numbered_register.  */
 157   const char **ymmh_register_names;
 158
 159   /* Register number for %ymm16h.  Set this to -1 to indicate the absence
 160   of support for YMM16-31.  */
 161   int ymm16h_regnum;
 162
 163   /* YMM16-31 register names.  Only used for tdesc_numbered_register.  */
 164   const char **ymm16h_register_names;
 165
 166   /* Register number for %bnd0r.  Set this to -1 to indicate the absence
 167      bound registers.  */
 168   int bnd0r_regnum;
 169
 170   /* Register number for pseudo register %bnd0.  Set this to -1 to indicate the absence
 171      bound registers.  */
 172   int bnd0_regnum;
 173
 174   /* Register number for %bndcfgu. Set this to -1 to indicate the absence
 175      bound control registers.  */
 176   int bndcfgu_regnum;
 177
 178   /* MPX register names.  Only used for tdesc_numbered_register.  */
 179   const char **mpx_register_names;
 180
 181   /* Register number for %zmm0h.  Set this to -1 to indicate the absence
 182      of ZMM_HI256 register support.  */
 183   int zmm0h_regnum;
 184
 185   /* OpMask register names.  */
 186   const char **k_register_names;
 187
 188   /* ZMM register names.  Only used for tdesc_numbered_register.  */
 189   const char **zmmh_register_names;
 190
 191   /* XMM16-31 register names.  Only used for tdesc_numbered_register.  */
 192   const char **xmm_avx512_register_names;
 193
 194   /* YMM16-31 register names.  Only used for tdesc_numbered_register.  */
 195   const char **ymm_avx512_register_names;
 196
 197   /* Target description.  */
 198   const struct target_desc *tdesc;
 199
 200   /* Register group function.  */
 201   const void *register_reggroup_p;
 202
 203   /* Offset of saved PC in jmp_buf.  */
 204   int jb_pc_offset;
 205
 206   /* Convention for returning structures.  */
 207   enum struct_return struct_return;
 208
 209   /* Address range where sigtramp lives.  */
 210   CORE_ADDR sigtramp_start;
 211   CORE_ADDR sigtramp_end;
 212
 213   /* Detect sigtramp.  */
 214   int (*sigtramp_p) (struct frame_info *);
 215
 216   /* Get address of sigcontext for sigtramp.  */
 217   CORE_ADDR (*sigcontext_addr) (struct frame_info *);
 218
 219   /* Offset of registers in `struct sigcontext'.  */
 220   int *sc_reg_offset;
 221   int sc_num_regs;
 222
 223   /* Offset of saved PC and SP in `struct sigcontext'.  Usage of these
 224      is deprecated, please use `sc_reg_offset' instead.  */
 225   int sc_pc_offset;
 226   int sc_sp_offset;
 227
 228   /* ISA-specific data types.  */
 229   struct type *i386_mmx_type;
 230   struct type *i386_ymm_type;
 231   struct type *i386_zmm_type;
 232   struct type *i387_ext_type;
 233   struct type *i386_bnd_type;
 234
 235   /* Process record/replay target.  */
 236   /* The map for registers because the AMD64's registers order
 237      in GDB is not same as I386 instructions.  */
 238   const int *record_regmap;
 239   /* Parse intx80 args.  */
 240   int (*i386_intx80_record) (struct regcache *regcache);
 241   /* Parse sysenter args.  */
 242   int (*i386_sysenter_record) (struct regcache *regcache);
 243   /* Parse syscall args.  */
 244   int (*i386_syscall_record) (struct regcache *regcache);
 245 };
 246
 247 /* Floating-point registers.  */
 248
 249 /* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
 250    (at most) in the FPU, but are zero-extended to 32 bits in GDB's
 251    register cache.  */
 252
 253 /* Return non-zero if REGNUM matches the FP register and the FP
 254    register set is active.  */
 255 extern int i386_fp_regnum_p (struct gdbarch *, int);
 256 extern int i386_fpc_regnum_p (struct gdbarch *, int);
 257
 258 /* Register numbers of various important registers.  */
 259
 260 enum i386_regnum
 261 {
 262   I386_EAX_REGNUM,              /* %eax */
 263   I386_ECX_REGNUM,              /* %ecx */
 264   I386_EDX_REGNUM,              /* %edx */
 265   I386_EBX_REGNUM,              /* %ebx */
 266   I386_ESP_REGNUM,              /* %esp */
 267   I386_EBP_REGNUM,              /* %ebp */
 268   I386_ESI_REGNUM,              /* %esi */
 269   I386_EDI_REGNUM,              /* %edi */
 270   I386_EIP_REGNUM,              /* %eip */
 271   I386_EFLAGS_REGNUM,           /* %eflags */
 272   I386_CS_REGNUM,               /* %cs */
 273   I386_SS_REGNUM,               /* %ss */
 274   I386_DS_REGNUM,               /* %ds */
 275   I386_ES_REGNUM,               /* %es */
 276   I386_FS_REGNUM,               /* %fs */
 277   I386_GS_REGNUM,               /* %gs */
 278   I386_ST0_REGNUM,              /* %st(0) */
 279   I386_MXCSR_REGNUM = 40,       /* %mxcsr */
 280   I386_YMM0H_REGNUM,            /* %ymm0h */
 281   I386_YMM7H_REGNUM = I386_YMM0H_REGNUM + 7,
 282   I386_BND0R_REGNUM,
 283   I386_BND3R_REGNUM = I386_BND0R_REGNUM + 3,
 284   I386_BNDCFGU_REGNUM,
 285   I386_BNDSTATUS_REGNUM,
 286   I386_K0_REGNUM,               /* %k0 */
 287   I386_K7_REGNUM = I386_K0_REGNUM + 7,
 288   I386_ZMM0H_REGNUM,            /* %zmm0h */
 289   I386_ZMM7H_REGNUM = I386_ZMM0H_REGNUM + 7
 290 };
 291
 292 /* Register numbers of RECORD_REGMAP.  */
 293
 294 enum record_i386_regnum
 295 {
 296   X86_RECORD_REAX_REGNUM,
 297   X86_RECORD_RECX_REGNUM,
 298   X86_RECORD_REDX_REGNUM,
 299   X86_RECORD_REBX_REGNUM,
 300   X86_RECORD_RESP_REGNUM,
 301   X86_RECORD_REBP_REGNUM,
 302   X86_RECORD_RESI_REGNUM,
 303   X86_RECORD_REDI_REGNUM,
 304   X86_RECORD_R8_REGNUM,
 305   X86_RECORD_R9_REGNUM,
 306   X86_RECORD_R10_REGNUM,
 307   X86_RECORD_R11_REGNUM,
 308   X86_RECORD_R12_REGNUM,
 309   X86_RECORD_R13_REGNUM,
 310   X86_RECORD_R14_REGNUM,
 311   X86_RECORD_R15_REGNUM,
 312   X86_RECORD_REIP_REGNUM,
 313   X86_RECORD_EFLAGS_REGNUM,
 314   X86_RECORD_CS_REGNUM,
 315   X86_RECORD_SS_REGNUM,
 316   X86_RECORD_DS_REGNUM,
 317   X86_RECORD_ES_REGNUM,
 318   X86_RECORD_FS_REGNUM,
 319   X86_RECORD_GS_REGNUM,
 320 };
 321
 322 #define I386_NUM_GREGS  16
 323 #define I386_NUM_XREGS  9
 324
 325 #define I386_SSE_NUM_REGS       (I386_MXCSR_REGNUM + 1)
 326 #define I386_AVX_NUM_REGS       (I386_YMM7H_REGNUM + 1)
 327 #define I386_MPX_NUM_REGS       (I386_BNDSTATUS_REGNUM + 1)
 328 #define I386_AVX512_NUM_REGS    (I386_ZMM7H_REGNUM + 1)
 329
 330 /* Size of the largest register.  */
 331 #define I386_MAX_REGISTER_SIZE  64
 332
 333 /* Types for i386-specific registers.  */
 334 extern struct type *i387_ext_type (struct gdbarch *gdbarch);
 335
 336 /* Checks of different pseudo-registers.  */
 337 extern int i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum);
 338 extern int i386_word_regnum_p (struct gdbarch *gdbarch, int regnum);
 339 extern int i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum);
 340 extern int i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum);
 341 extern int i386_xmm_avx512_regnum_p (struct gdbarch * gdbarch, int regnum);
 342 extern int i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum);
 343 extern int i386_ymm_avx512_regnum_p (struct gdbarch *gdbarch, int regnum);
 344 extern int i386_bnd_regnum_p (struct gdbarch *gdbarch, int regnum);
 345 extern int i386_k_regnum_p (struct gdbarch *gdbarch, int regnum);
 346 extern int i386_zmm_regnum_p (struct gdbarch *gdbarch, int regnum);
 347 extern int i386_zmmh_regnum_p (struct gdbarch *gdbarch, int regnum);
 348
 349 extern const char *i386_pseudo_register_name (struct gdbarch *gdbarch,
 350                                               int regnum);
 351 extern struct type *i386_pseudo_register_type (struct gdbarch *gdbarch,
 352                                                int regnum);
 353
 354 extern void i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
 355                                                   struct regcache *regcache,
 356                                                   int regnum,
 357                                                   struct value *result);
 358
 359 extern void i386_pseudo_register_write (struct gdbarch *gdbarch,
 360                                         struct regcache *regcache,
 361                                         int regnum, const gdb_byte *buf);
 362
 363 /* Segment selectors.  */
 364 #define I386_SEL_RPL    0x0003  /* Requester's Privilege Level mask.  */
 365 #define I386_SEL_UPL    0x0003  /* User Privilige Level.  */
 366 #define I386_SEL_KPL    0x0000  /* Kernel Privilige Level.  */
 367
 368 /* The length of the longest i386 instruction (according to
 369    include/asm-i386/kprobes.h in Linux 2.6.  */
 370 #define I386_MAX_INSN_LEN (16)
 371
 372 /* Functions exported from i386-tdep.c.  */
 373 extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame,
 374                                                CORE_ADDR pc, char *name);
 375 extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch,
 376                                           CORE_ADDR pc);
 377
 378 /* Return whether the THIS_FRAME corresponds to a sigtramp routine.  */
 379 extern int i386_sigtramp_p (struct frame_info *this_frame);
 380
 381 /* Return non-zero if REGNUM is a member of the specified group.  */
 382 extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
 383                                      struct reggroup *group);
 384
 385 /* Supply register REGNUM from the general-purpose register set REGSET
 386    to register cache REGCACHE.  If REGNUM is -1, do this for all
 387    registers in REGSET.  */
 388 extern void i386_supply_gregset (const struct regset *regset,
 389                                  struct regcache *regcache, int regnum,
 390                                  const void *gregs, size_t len);
 391
 392 /* Collect register REGNUM from the register cache REGCACHE and store
 393    it in the buffer specified by GREGS and LEN as described by the
 394    general-purpose register set REGSET.  If REGNUM is -1, do this for
 395    all registers in REGSET.  */
 396 extern void i386_collect_gregset (const struct regset *regset,
 397                                   const struct regcache *regcache,
 398                                   int regnum, void *gregs, size_t len);
 399
 400 /* Return the appropriate register set for the core section identified
 401    by SECT_NAME and SECT_SIZE.  */
 402 extern const struct regset *
 403   i386_regset_from_core_section (struct gdbarch *gdbarch,
 404                                  const char *sect_name, size_t sect_size);
 405
 406
 407 extern struct displaced_step_closure *i386_displaced_step_copy_insn
 408   (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to,
 409    struct regcache *regs);
 410 extern void i386_displaced_step_fixup (struct gdbarch *gdbarch,
 411                                        struct displaced_step_closure *closure,
 412                                        CORE_ADDR from, CORE_ADDR to,
 413                                        struct regcache *regs);
 414
 415 /* Initialize a basic ELF architecture variant.  */
 416 extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *);
 417
 418 /* Initialize a SVR4 architecture variant.  */
 419 extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
 420
 421 extern int i386_process_record (struct gdbarch *gdbarch,
 422                                 struct regcache *regcache, CORE_ADDR addr);
 423
 424 \f
 425
 426 /* Functions and variables exported from i386bsd-tdep.c.  */
 427
 428 extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *);
 429 extern CORE_ADDR i386fbsd_sigtramp_start_addr;
 430 extern CORE_ADDR i386fbsd_sigtramp_end_addr;
 431 extern CORE_ADDR i386obsd_sigtramp_start_addr;
 432 extern CORE_ADDR i386obsd_sigtramp_end_addr;
 433 extern int i386fbsd4_sc_reg_offset[];
 434 extern int i386fbsd_sc_reg_offset[];
 435 extern int i386nbsd_sc_reg_offset[];
 436 extern int i386obsd_sc_reg_offset[];
 437 extern int i386bsd_sc_reg_offset[];
 438
 439 /* SystemTap related functions.  */
 440
 441 extern int i386_stap_is_single_operand (struct gdbarch *gdbarch,
 442                                         const char *s);
 443
 444 extern int i386_stap_parse_special_token (struct gdbarch *gdbarch,
 445                                           struct stap_parse_info *p);
 446
 447 #endif /* i386-tdep.h */