gdb/i386-tdep.h

   1 /* Target-dependent code for the i386.
   2
   3    Copyright (C) 2001-2016 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   gdbarch_register_reggroup_p_ftype *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 extern struct target_desc *tdesc_i386;
 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 extern int i386_ax_pseudo_register_collect (struct gdbarch *gdbarch,
 364                                             struct agent_expr *ax,
 365                                             int regnum);
 366
 367 /* Segment selectors.  */
 368 #define I386_SEL_RPL    0x0003  /* Requester's Privilege Level mask.  */
 369 #define I386_SEL_UPL    0x0003  /* User Privilige Level.  */
 370 #define I386_SEL_KPL    0x0000  /* Kernel Privilige Level.  */
 371
 372 /* The length of the longest i386 instruction (according to
 373    include/asm-i386/kprobes.h in Linux 2.6.  */
 374 #define I386_MAX_INSN_LEN (16)
 375
 376 /* Functions exported from i386-tdep.c.  */
 377 extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame,
 378                                                CORE_ADDR pc, char *name);
 379 extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch,
 380                                           CORE_ADDR pc);
 381
 382 /* Return whether the THIS_FRAME corresponds to a sigtramp routine.  */
 383 extern int i386_sigtramp_p (struct frame_info *this_frame);
 384
 385 /* Return non-zero if REGNUM is a member of the specified group.  */
 386 extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
 387                                      struct reggroup *group);
 388
 389 /* Supply register REGNUM from the general-purpose register set REGSET
 390    to register cache REGCACHE.  If REGNUM is -1, do this for all
 391    registers in REGSET.  */
 392 extern void i386_supply_gregset (const struct regset *regset,
 393                                  struct regcache *regcache, int regnum,
 394                                  const void *gregs, size_t len);
 395
 396 /* General-purpose register set. */
 397 extern const struct regset i386_gregset;
 398
 399 /* Floating-point register set. */
 400 extern const struct regset i386_fpregset;
 401
 402 /* Default iterator over core file register note sections.  */
 403 extern void
 404   i386_iterate_over_regset_sections (struct gdbarch *gdbarch,
 405                                      iterate_over_regset_sections_cb *cb,
 406                                      void *cb_data,
 407                                      const struct regcache *regcache);
 408
 409 extern struct displaced_step_closure *i386_displaced_step_copy_insn
 410   (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to,
 411    struct regcache *regs);
 412 extern void i386_displaced_step_fixup (struct gdbarch *gdbarch,
 413                                        struct displaced_step_closure *closure,
 414                                        CORE_ADDR from, CORE_ADDR to,
 415                                        struct regcache *regs);
 416
 417 /* Initialize a basic ELF architecture variant.  */
 418 extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *);
 419
 420 /* Initialize a SVR4 architecture variant.  */
 421 extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
 422
 423 extern int i386_process_record (struct gdbarch *gdbarch,
 424                                 struct regcache *regcache, CORE_ADDR addr);
 425 extern const struct target_desc *i386_target_description (uint64_t xcr0);
 426
 427 /* Return true iff the current target is MPX enabled.  */
 428 extern int i386_mpx_enabled (void);
 429 \f
 430
 431 /* Functions and variables exported from i386bsd-tdep.c.  */
 432
 433 extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *);
 434 extern CORE_ADDR i386fbsd_sigtramp_start_addr;
 435 extern CORE_ADDR i386fbsd_sigtramp_end_addr;
 436 extern CORE_ADDR i386obsd_sigtramp_start_addr;
 437 extern CORE_ADDR i386obsd_sigtramp_end_addr;
 438 extern int i386fbsd4_sc_reg_offset[];
 439 extern int i386fbsd_sc_reg_offset[];
 440 extern int i386nbsd_sc_reg_offset[];
 441 extern int i386obsd_sc_reg_offset[];
 442 extern int i386bsd_sc_reg_offset[];
 443
 444 /* SystemTap related functions.  */
 445
 446 extern int i386_stap_is_single_operand (struct gdbarch *gdbarch,
 447                                         const char *s);
 448
 449 extern int i386_stap_parse_special_token (struct gdbarch *gdbarch,
 450                                           struct stap_parse_info *p);
 451
 452 #endif /* i386-tdep.h */