gdb/i386-tdep.h

   1 /* Target-dependent code for the i386.
   2
   3    Copyright (C) 2001-2018 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 #include "infrun.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, gdbarch_fp0_regnum
  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   int *gregset_reg_offset;
  62   int gregset_num_regs;
  63   size_t sizeof_gregset;
  64
  65   /* Floating-point registers.  */
  66   size_t sizeof_fpregset;
  67
  68   /* Register number for %st(0).  The register numbers for the other
  69      registers follow from this one.  Set this to -1 to indicate the
  70      absence of an FPU.  */
  71   int st0_regnum;
  72
  73   /* Number of MMX registers.  */
  74   int num_mmx_regs;
  75
  76   /* Register number for %mm0.  Set this to -1 to indicate the absence
  77      of MMX support.  */
  78   int mm0_regnum;
  79
  80   /* Number of pseudo YMM registers.  */
  81   int num_ymm_regs;
  82
  83   /* Register number for %ymm0.  Set this to -1 to indicate the absence
  84      of pseudo YMM register support.  */
  85   int ymm0_regnum;
  86
  87   /* Number of AVX512 OpMask registers (K-registers)  */
  88   int num_k_regs;
  89
  90   /* Register number for %k0.  Set this to -1 to indicate the absence
  91      of AVX512 OpMask register support.  */
  92   int k0_regnum;
  93
  94   /* Number of pseudo ZMM registers ($zmm0-$zmm31).  */
  95   int num_zmm_regs;
  96
  97   /* Register number for %zmm0.  Set this to -1 to indicate the absence
  98      of pseudo ZMM register support.  */
  99   int zmm0_regnum;
 100
 101   /* Number of byte registers.  */
 102   int num_byte_regs;
 103
 104   /* Register pseudo number for %al.  */
 105   int al_regnum;
 106
 107   /* Number of pseudo word registers.  */
 108   int num_word_regs;
 109
 110   /* Register number for %ax.  */
 111   int ax_regnum;
 112
 113   /* Number of pseudo dword registers.  */
 114   int num_dword_regs;
 115
 116   /* Register number for %eax.  Set this to -1 to indicate the absence
 117      of pseudo dword register support.  */
 118   int eax_regnum;
 119
 120   /* Number of core registers.  */
 121   int num_core_regs;
 122
 123   /* Number of SSE registers.  */
 124   int num_xmm_regs;
 125
 126   /* Number of SSE registers added in AVX512.  */
 127   int num_xmm_avx512_regs;
 128
 129   /* Register number of XMM16, the first XMM register added in AVX512.  */
 130   int xmm16_regnum;
 131
 132   /* Number of YMM registers added in AVX512.  */
 133   int num_ymm_avx512_regs;
 134
 135   /* Register number of YMM16, the first YMM register added in AVX512.  */
 136   int ymm16_regnum;
 137
 138   /* Bits of the extended control register 0 (the XFEATURE_ENABLED_MASK
 139      register), excluding the x87 bit, which are supported by this GDB.  */
 140
 141   uint64_t xcr0;
 142
 143   /* Offset of XCR0 in XSAVE extended state.  */
 144   int xsave_xcr0_offset;
 145
 146   /* Register names.  */
 147   const char **register_names;
 148
 149   /* Register number for %ymm0h.  Set this to -1 to indicate the absence
 150      of upper YMM register support.  */
 151   int ymm0h_regnum;
 152
 153   /* Upper YMM register names.  Only used for tdesc_numbered_register.  */
 154   const char **ymmh_register_names;
 155
 156   /* Register number for %ymm16h.  Set this to -1 to indicate the absence
 157   of support for YMM16-31.  */
 158   int ymm16h_regnum;
 159
 160   /* YMM16-31 register names.  Only used for tdesc_numbered_register.  */
 161   const char **ymm16h_register_names;
 162
 163   /* Register number for %bnd0r.  Set this to -1 to indicate the absence
 164      bound registers.  */
 165   int bnd0r_regnum;
 166
 167   /* Register number for pseudo register %bnd0.  Set this to -1 to indicate the absence
 168      bound registers.  */
 169   int bnd0_regnum;
 170
 171   /* Register number for %bndcfgu. Set this to -1 to indicate the absence
 172      bound control registers.  */
 173   int bndcfgu_regnum;
 174
 175   /* MPX register names.  Only used for tdesc_numbered_register.  */
 176   const char **mpx_register_names;
 177
 178   /* Register number for %zmm0h.  Set this to -1 to indicate the absence
 179      of ZMM_HI256 register support.  */
 180   int zmm0h_regnum;
 181
 182   /* OpMask register names.  */
 183   const char **k_register_names;
 184
 185   /* ZMM register names.  Only used for tdesc_numbered_register.  */
 186   const char **zmmh_register_names;
 187
 188   /* XMM16-31 register names.  Only used for tdesc_numbered_register.  */
 189   const char **xmm_avx512_register_names;
 190
 191   /* YMM16-31 register names.  Only used for tdesc_numbered_register.  */
 192   const char **ymm_avx512_register_names;
 193
 194   /* Number of PKEYS registers.  */
 195   int num_pkeys_regs;
 196
 197   /* Register number for PKRU register.  */
 198   int pkru_regnum;
 199
 200   /* PKEYS register names.  */
 201   const char **pkeys_register_names;
 202
 203   /* Target description.  */
 204   const struct target_desc *tdesc;
 205
 206   /* Register group function.  */
 207   gdbarch_register_reggroup_p_ftype *register_reggroup_p;
 208
 209   /* Offset of saved PC in jmp_buf.  */
 210   int jb_pc_offset;
 211
 212   /* Convention for returning structures.  */
 213   enum struct_return struct_return;
 214
 215   /* Address range where sigtramp lives.  */
 216   CORE_ADDR sigtramp_start;
 217   CORE_ADDR sigtramp_end;
 218
 219   /* Detect sigtramp.  */
 220   int (*sigtramp_p) (struct frame_info *);
 221
 222   /* Get address of sigcontext for sigtramp.  */
 223   CORE_ADDR (*sigcontext_addr) (struct frame_info *);
 224
 225   /* Offset of registers in `struct sigcontext'.  */
 226   int *sc_reg_offset;
 227   int sc_num_regs;
 228
 229   /* Offset of saved PC and SP in `struct sigcontext'.  Usage of these
 230      is deprecated, please use `sc_reg_offset' instead.  */
 231   int sc_pc_offset;
 232   int sc_sp_offset;
 233
 234   /* ISA-specific data types.  */
 235   struct type *i386_mmx_type;
 236   struct type *i386_ymm_type;
 237   struct type *i386_zmm_type;
 238   struct type *i387_ext_type;
 239   struct type *i386_bnd_type;
 240
 241   /* Process record/replay target.  */
 242   /* The map for registers because the AMD64's registers order
 243      in GDB is not same as I386 instructions.  */
 244   const int *record_regmap;
 245   /* Parse intx80 args.  */
 246   int (*i386_intx80_record) (struct regcache *regcache);
 247   /* Parse sysenter args.  */
 248   int (*i386_sysenter_record) (struct regcache *regcache);
 249   /* Parse syscall args.  */
 250   int (*i386_syscall_record) (struct regcache *regcache);
 251
 252   /* Regsets. */
 253   const struct regset *fpregset;
 254 };
 255
 256 /* Floating-point registers.  */
 257
 258 /* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
 259    (at most) in the FPU, but are zero-extended to 32 bits in GDB's
 260    register cache.  */
 261
 262 /* Return non-zero if REGNUM matches the FP register and the FP
 263    register set is active.  */
 264 extern int i386_fp_regnum_p (struct gdbarch *, int);
 265 extern int i386_fpc_regnum_p (struct gdbarch *, int);
 266
 267 /* Register numbers of various important registers.  */
 268
 269 enum i386_regnum
 270 {
 271   I386_EAX_REGNUM,              /* %eax */
 272   I386_ECX_REGNUM,              /* %ecx */
 273   I386_EDX_REGNUM,              /* %edx */
 274   I386_EBX_REGNUM,              /* %ebx */
 275   I386_ESP_REGNUM,              /* %esp */
 276   I386_EBP_REGNUM,              /* %ebp */
 277   I386_ESI_REGNUM,              /* %esi */
 278   I386_EDI_REGNUM,              /* %edi */
 279   I386_EIP_REGNUM,              /* %eip */
 280   I386_EFLAGS_REGNUM,           /* %eflags */
 281   I386_CS_REGNUM,               /* %cs */
 282   I386_SS_REGNUM,               /* %ss */
 283   I386_DS_REGNUM,               /* %ds */
 284   I386_ES_REGNUM,               /* %es */
 285   I386_FS_REGNUM,               /* %fs */
 286   I386_GS_REGNUM,               /* %gs */
 287   I386_ST0_REGNUM,              /* %st(0) */
 288   I386_MXCSR_REGNUM = 40,       /* %mxcsr */
 289   I386_YMM0H_REGNUM,            /* %ymm0h */
 290   I386_YMM7H_REGNUM = I386_YMM0H_REGNUM + 7,
 291   I386_BND0R_REGNUM,
 292   I386_BND3R_REGNUM = I386_BND0R_REGNUM + 3,
 293   I386_BNDCFGU_REGNUM,
 294   I386_BNDSTATUS_REGNUM,
 295   I386_K0_REGNUM,               /* %k0 */
 296   I386_K7_REGNUM = I386_K0_REGNUM + 7,
 297   I386_ZMM0H_REGNUM,            /* %zmm0h */
 298   I386_ZMM7H_REGNUM = I386_ZMM0H_REGNUM + 7,
 299   I386_PKRU_REGNUM
 300 };
 301
 302 /* Register numbers of RECORD_REGMAP.  */
 303
 304 enum record_i386_regnum
 305 {
 306   X86_RECORD_REAX_REGNUM,
 307   X86_RECORD_RECX_REGNUM,
 308   X86_RECORD_REDX_REGNUM,
 309   X86_RECORD_REBX_REGNUM,
 310   X86_RECORD_RESP_REGNUM,
 311   X86_RECORD_REBP_REGNUM,
 312   X86_RECORD_RESI_REGNUM,
 313   X86_RECORD_REDI_REGNUM,
 314   X86_RECORD_R8_REGNUM,
 315   X86_RECORD_R9_REGNUM,
 316   X86_RECORD_R10_REGNUM,
 317   X86_RECORD_R11_REGNUM,
 318   X86_RECORD_R12_REGNUM,
 319   X86_RECORD_R13_REGNUM,
 320   X86_RECORD_R14_REGNUM,
 321   X86_RECORD_R15_REGNUM,
 322   X86_RECORD_REIP_REGNUM,
 323   X86_RECORD_EFLAGS_REGNUM,
 324   X86_RECORD_CS_REGNUM,
 325   X86_RECORD_SS_REGNUM,
 326   X86_RECORD_DS_REGNUM,
 327   X86_RECORD_ES_REGNUM,
 328   X86_RECORD_FS_REGNUM,
 329   X86_RECORD_GS_REGNUM,
 330 };
 331
 332 #define I386_NUM_GREGS  16
 333 #define I386_NUM_XREGS  9
 334
 335 #define I386_SSE_NUM_REGS       (I386_MXCSR_REGNUM + 1)
 336 #define I386_AVX_NUM_REGS       (I386_YMM7H_REGNUM + 1)
 337 #define I386_MPX_NUM_REGS       (I386_BNDSTATUS_REGNUM + 1)
 338 #define I386_AVX512_NUM_REGS    (I386_ZMM7H_REGNUM + 1)
 339 #define I386_PKEYS_NUM_REGS     (I386_PKRU_REGNUM + 1)
 340
 341 /* Size of the largest register.  */
 342 #define I386_MAX_REGISTER_SIZE  64
 343
 344 /* Types for i386-specific registers.  */
 345 extern struct type *i387_ext_type (struct gdbarch *gdbarch);
 346
 347 /* Checks of different pseudo-registers.  */
 348 extern int i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum);
 349 extern int i386_word_regnum_p (struct gdbarch *gdbarch, int regnum);
 350 extern int i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum);
 351 extern int i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum);
 352 extern int i386_xmm_avx512_regnum_p (struct gdbarch * gdbarch, int regnum);
 353 extern int i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum);
 354 extern int i386_ymm_avx512_regnum_p (struct gdbarch *gdbarch, int regnum);
 355 extern int i386_bnd_regnum_p (struct gdbarch *gdbarch, int regnum);
 356 extern int i386_k_regnum_p (struct gdbarch *gdbarch, int regnum);
 357 extern int i386_zmm_regnum_p (struct gdbarch *gdbarch, int regnum);
 358 extern int i386_zmmh_regnum_p (struct gdbarch *gdbarch, int regnum);
 359 extern bool i386_pkru_regnum_p (struct gdbarch *gdbarch, int regnum);
 360
 361 extern const char *i386_pseudo_register_name (struct gdbarch *gdbarch,
 362                                               int regnum);
 363 extern struct type *i386_pseudo_register_type (struct gdbarch *gdbarch,
 364                                                int regnum);
 365
 366 extern void i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
 367                                                   readable_regcache *regcache,
 368                                                   int regnum,
 369                                                   struct value *result);
 370
 371 extern void i386_pseudo_register_write (struct gdbarch *gdbarch,
 372                                         struct regcache *regcache,
 373                                         int regnum, const gdb_byte *buf);
 374
 375 extern int i386_ax_pseudo_register_collect (struct gdbarch *gdbarch,
 376                                             struct agent_expr *ax,
 377                                             int regnum);
 378
 379 /* Segment selectors.  */
 380 #define I386_SEL_RPL    0x0003  /* Requester's Privilege Level mask.  */
 381 #define I386_SEL_UPL    0x0003  /* User Privilige Level.  */
 382 #define I386_SEL_KPL    0x0000  /* Kernel Privilige Level.  */
 383
 384 /* The length of the longest i386 instruction (according to
 385    include/asm-i386/kprobes.h in Linux 2.6.  */
 386 #define I386_MAX_INSN_LEN (16)
 387
 388 /* Functions exported from i386-tdep.c.  */
 389 extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame,
 390                                                CORE_ADDR pc, char *name);
 391 extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch,
 392                                           CORE_ADDR pc);
 393
 394 /* Return whether the THIS_FRAME corresponds to a sigtramp routine.  */
 395 extern int i386_sigtramp_p (struct frame_info *this_frame);
 396
 397 /* Return non-zero if REGNUM is a member of the specified group.  */
 398 extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
 399                                      struct reggroup *group);
 400
 401 /* Supply register REGNUM from the general-purpose register set REGSET
 402    to register cache REGCACHE.  If REGNUM is -1, do this for all
 403    registers in REGSET.  */
 404 extern void i386_supply_gregset (const struct regset *regset,
 405                                  struct regcache *regcache, int regnum,
 406                                  const void *gregs, size_t len);
 407
 408 /* General-purpose register set. */
 409 extern const struct regset i386_gregset;
 410
 411 /* Floating-point register set. */
 412 extern const struct regset i386_fpregset;
 413
 414 /* Default iterator over core file register note sections.  */
 415 extern void
 416   i386_iterate_over_regset_sections (struct gdbarch *gdbarch,
 417                                      iterate_over_regset_sections_cb *cb,
 418                                      void *cb_data,
 419                                      const struct regcache *regcache);
 420
 421 typedef buf_displaced_step_closure i386_displaced_step_closure;
 422
 423 extern struct displaced_step_closure *i386_displaced_step_copy_insn
 424   (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to,
 425    struct regcache *regs);
 426 extern void i386_displaced_step_fixup (struct gdbarch *gdbarch,
 427                                        struct displaced_step_closure *closure,
 428                                        CORE_ADDR from, CORE_ADDR to,
 429                                        struct regcache *regs);
 430
 431 /* Initialize a basic ELF architecture variant.  */
 432 extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *);
 433
 434 /* Initialize a SVR4 architecture variant.  */
 435 extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
 436
 437 /* Convert SVR4 register number REG to the appropriate register number
 438    used by GDB.  */
 439 extern int i386_svr4_reg_to_regnum (struct gdbarch *gdbarch, int reg);
 440
 441 extern int i386_process_record (struct gdbarch *gdbarch,
 442                                 struct regcache *regcache, CORE_ADDR addr);
 443 extern const struct target_desc *i386_target_description (uint64_t xcr0);
 444
 445 /* Return true iff the current target is MPX enabled.  */
 446 extern int i386_mpx_enabled (void);
 447 \f
 448
 449 /* Functions and variables exported from i386-bsd-tdep.c.  */
 450
 451 extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *);
 452 extern CORE_ADDR i386fbsd_sigtramp_start_addr;
 453 extern CORE_ADDR i386fbsd_sigtramp_end_addr;
 454 extern CORE_ADDR i386obsd_sigtramp_start_addr;
 455 extern CORE_ADDR i386obsd_sigtramp_end_addr;
 456 extern int i386fbsd4_sc_reg_offset[];
 457 extern int i386fbsd_sc_reg_offset[];
 458 extern int i386nbsd_sc_reg_offset[];
 459 extern int i386obsd_sc_reg_offset[];
 460 extern int i386bsd_sc_reg_offset[];
 461
 462 /* SystemTap related functions.  */
 463
 464 extern int i386_stap_is_single_operand (struct gdbarch *gdbarch,
 465                                         const char *s);
 466
 467 extern int i386_stap_parse_special_token (struct gdbarch *gdbarch,
 468                                           struct stap_parse_info *p);
 469
 470 #endif /* i386-tdep.h */