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