1 /* Target-dependent code for the i386.
3 Copyright (C) 2001-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
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.
33 - General purpose registers
35 - FPU control registers
37 - SSE control register
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
47 /* Convention for returning structures. */
51 pcc_struct_return
, /* Return "short" structures in memory. */
52 reg_struct_return
/* Return "short" structures in registers. */
55 /* i386 architecture specific information. */
58 /* General-purpose registers. */
59 struct regset
*gregset
;
60 int *gregset_reg_offset
;
62 size_t sizeof_gregset
;
64 /* Floating-point registers. */
65 struct regset
*fpregset
;
66 size_t sizeof_fpregset
;
68 /* XSAVE extended state. */
69 struct regset
*xstateregset
;
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
76 /* Number of MMX registers. */
79 /* Register number for %mm0. Set this to -1 to indicate the absence
83 /* Number of pseudo YMM registers. */
86 /* Register number for %ymm0. Set this to -1 to indicate the absence
87 of pseudo YMM register support. */
90 /* Number of byte registers. */
93 /* Register pseudo number for %al. */
96 /* Number of pseudo word registers. */
99 /* Register number for %ax. */
102 /* Number of pseudo dword registers. */
105 /* Register number for %eax. Set this to -1 to indicate the absence
106 of pseudo dword register support. */
109 /* Number of core registers. */
112 /* Number of SSE registers. */
115 /* Bits of the extended control register 0 (the XFEATURE_ENABLED_MASK
116 register), excluding the x87 bit, which are supported by this GDB. */
120 /* Offset of XCR0 in XSAVE extended state. */
121 int xsave_xcr0_offset
;
123 /* Register names. */
124 const char **register_names
;
126 /* Register number for %ymm0h. Set this to -1 to indicate the absence
127 of upper YMM register support. */
130 /* Upper YMM register names. Only used for tdesc_numbered_register. */
131 const char **ymmh_register_names
;
133 /* Target description. */
134 const struct target_desc
*tdesc
;
136 /* Register group function. */
137 const void *register_reggroup_p
;
139 /* Offset of saved PC in jmp_buf. */
142 /* Convention for returning structures. */
143 enum struct_return struct_return
;
145 /* Address range where sigtramp lives. */
146 CORE_ADDR sigtramp_start
;
147 CORE_ADDR sigtramp_end
;
149 /* Detect sigtramp. */
150 int (*sigtramp_p
) (struct frame_info
*);
152 /* Get address of sigcontext for sigtramp. */
153 CORE_ADDR (*sigcontext_addr
) (struct frame_info
*);
155 /* Offset of registers in `struct sigcontext'. */
159 /* Offset of saved PC and SP in `struct sigcontext'. Usage of these
160 is deprecated, please use `sc_reg_offset' instead. */
164 /* ISA-specific data types. */
165 struct type
*i386_mmx_type
;
166 struct type
*i386_ymm_type
;
167 struct type
*i387_ext_type
;
169 /* Process record/replay target. */
170 /* The map for registers because the AMD64's registers order
171 in GDB is not same as I386 instructions. */
172 const int *record_regmap
;
173 /* Parse intx80 args. */
174 int (*i386_intx80_record
) (struct regcache
*regcache
);
175 /* Parse sysenter args. */
176 int (*i386_sysenter_record
) (struct regcache
*regcache
);
177 /* Parse syscall args. */
178 int (*i386_syscall_record
) (struct regcache
*regcache
);
181 /* Floating-point registers. */
183 /* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
184 (at most) in the FPU, but are zero-extended to 32 bits in GDB's
187 /* Return non-zero if REGNUM matches the FP register and the FP
188 register set is active. */
189 extern int i386_fp_regnum_p (struct gdbarch
*, int);
190 extern int i386_fpc_regnum_p (struct gdbarch
*, int);
192 /* Register numbers of various important registers. */
196 I386_EAX_REGNUM
, /* %eax */
197 I386_ECX_REGNUM
, /* %ecx */
198 I386_EDX_REGNUM
, /* %edx */
199 I386_EBX_REGNUM
, /* %ebx */
200 I386_ESP_REGNUM
, /* %esp */
201 I386_EBP_REGNUM
, /* %ebp */
202 I386_ESI_REGNUM
, /* %esi */
203 I386_EDI_REGNUM
, /* %edi */
204 I386_EIP_REGNUM
, /* %eip */
205 I386_EFLAGS_REGNUM
, /* %eflags */
206 I386_CS_REGNUM
, /* %cs */
207 I386_SS_REGNUM
, /* %ss */
208 I386_DS_REGNUM
, /* %ds */
209 I386_ES_REGNUM
, /* %es */
210 I386_FS_REGNUM
, /* %fs */
211 I386_GS_REGNUM
, /* %gs */
212 I386_ST0_REGNUM
, /* %st(0) */
213 I386_MXCSR_REGNUM
= 40, /* %mxcsr */
214 I386_YMM0H_REGNUM
, /* %ymm0h */
215 I386_YMM7H_REGNUM
= I386_YMM0H_REGNUM
+ 7
218 /* Register numbers of RECORD_REGMAP. */
220 enum record_i386_regnum
222 X86_RECORD_REAX_REGNUM
,
223 X86_RECORD_RECX_REGNUM
,
224 X86_RECORD_REDX_REGNUM
,
225 X86_RECORD_REBX_REGNUM
,
226 X86_RECORD_RESP_REGNUM
,
227 X86_RECORD_REBP_REGNUM
,
228 X86_RECORD_RESI_REGNUM
,
229 X86_RECORD_REDI_REGNUM
,
230 X86_RECORD_R8_REGNUM
,
231 X86_RECORD_R9_REGNUM
,
232 X86_RECORD_R10_REGNUM
,
233 X86_RECORD_R11_REGNUM
,
234 X86_RECORD_R12_REGNUM
,
235 X86_RECORD_R13_REGNUM
,
236 X86_RECORD_R14_REGNUM
,
237 X86_RECORD_R15_REGNUM
,
238 X86_RECORD_REIP_REGNUM
,
239 X86_RECORD_EFLAGS_REGNUM
,
240 X86_RECORD_CS_REGNUM
,
241 X86_RECORD_SS_REGNUM
,
242 X86_RECORD_DS_REGNUM
,
243 X86_RECORD_ES_REGNUM
,
244 X86_RECORD_FS_REGNUM
,
245 X86_RECORD_GS_REGNUM
,
248 #define I386_NUM_GREGS 16
249 #define I386_NUM_XREGS 9
251 #define I386_SSE_NUM_REGS (I386_MXCSR_REGNUM + 1)
252 #define I386_AVX_NUM_REGS (I386_YMM7H_REGNUM + 1)
254 /* Size of the largest register. */
255 #define I386_MAX_REGISTER_SIZE 16
257 /* Types for i386-specific registers. */
258 extern struct type
*i387_ext_type (struct gdbarch
*gdbarch
);
260 /* Checks of different pseudo-registers. */
261 extern int i386_byte_regnum_p (struct gdbarch
*gdbarch
, int regnum
);
262 extern int i386_word_regnum_p (struct gdbarch
*gdbarch
, int regnum
);
263 extern int i386_dword_regnum_p (struct gdbarch
*gdbarch
, int regnum
);
264 extern int i386_xmm_regnum_p (struct gdbarch
*gdbarch
, int regnum
);
265 extern int i386_ymm_regnum_p (struct gdbarch
*gdbarch
, int regnum
);
267 extern const char *i386_pseudo_register_name (struct gdbarch
*gdbarch
,
269 extern struct type
*i386_pseudo_register_type (struct gdbarch
*gdbarch
,
272 extern void i386_pseudo_register_read_into_value (struct gdbarch
*gdbarch
,
273 struct regcache
*regcache
,
275 struct value
*result
);
277 extern void i386_pseudo_register_write (struct gdbarch
*gdbarch
,
278 struct regcache
*regcache
,
279 int regnum
, const gdb_byte
*buf
);
281 /* Segment selectors. */
282 #define I386_SEL_RPL 0x0003 /* Requester's Privilege Level mask. */
283 #define I386_SEL_UPL 0x0003 /* User Privilige Level. */
284 #define I386_SEL_KPL 0x0000 /* Kernel Privilige Level. */
286 /* The length of the longest i386 instruction (according to
287 include/asm-i386/kprobes.h in Linux 2.6. */
288 #define I386_MAX_INSN_LEN (16)
290 /* Functions exported from i386-tdep.c. */
291 extern CORE_ADDR
i386_pe_skip_trampoline_code (struct frame_info
*frame
,
292 CORE_ADDR pc
, char *name
);
293 extern CORE_ADDR
i386_skip_main_prologue (struct gdbarch
*gdbarch
,
296 /* Return whether the THIS_FRAME corresponds to a sigtramp routine. */
297 extern int i386_sigtramp_p (struct frame_info
*this_frame
);
299 /* Return non-zero if REGNUM is a member of the specified group. */
300 extern int i386_register_reggroup_p (struct gdbarch
*gdbarch
, int regnum
,
301 struct reggroup
*group
);
303 /* Supply register REGNUM from the general-purpose register set REGSET
304 to register cache REGCACHE. If REGNUM is -1, do this for all
305 registers in REGSET. */
306 extern void i386_supply_gregset (const struct regset
*regset
,
307 struct regcache
*regcache
, int regnum
,
308 const void *gregs
, size_t len
);
310 /* Collect register REGNUM from the register cache REGCACHE and store
311 it in the buffer specified by GREGS and LEN as described by the
312 general-purpose register set REGSET. If REGNUM is -1, do this for
313 all registers in REGSET. */
314 extern void i386_collect_gregset (const struct regset
*regset
,
315 const struct regcache
*regcache
,
316 int regnum
, void *gregs
, size_t len
);
318 /* Return the appropriate register set for the core section identified
319 by SECT_NAME and SECT_SIZE. */
320 extern const struct regset
*
321 i386_regset_from_core_section (struct gdbarch
*gdbarch
,
322 const char *sect_name
, size_t sect_size
);
325 extern struct displaced_step_closure
*i386_displaced_step_copy_insn
326 (struct gdbarch
*gdbarch
, CORE_ADDR from
, CORE_ADDR to
,
327 struct regcache
*regs
);
328 extern void i386_displaced_step_fixup (struct gdbarch
*gdbarch
,
329 struct displaced_step_closure
*closure
,
330 CORE_ADDR from
, CORE_ADDR to
,
331 struct regcache
*regs
);
333 /* Initialize a basic ELF architecture variant. */
334 extern void i386_elf_init_abi (struct gdbarch_info
, struct gdbarch
*);
336 /* Initialize a SVR4 architecture variant. */
337 extern void i386_svr4_init_abi (struct gdbarch_info
, struct gdbarch
*);
339 extern int i386_process_record (struct gdbarch
*gdbarch
,
340 struct regcache
*regcache
, CORE_ADDR addr
);
344 /* Functions and variables exported from i386bsd-tdep.c. */
346 extern void i386bsd_init_abi (struct gdbarch_info
, struct gdbarch
*);
347 extern CORE_ADDR i386fbsd_sigtramp_start_addr
;
348 extern CORE_ADDR i386fbsd_sigtramp_end_addr
;
349 extern CORE_ADDR i386obsd_sigtramp_start_addr
;
350 extern CORE_ADDR i386obsd_sigtramp_end_addr
;
351 extern int i386fbsd4_sc_reg_offset
[];
352 extern int i386fbsd_sc_reg_offset
[];
353 extern int i386nbsd_sc_reg_offset
[];
354 extern int i386obsd_sc_reg_offset
[];
355 extern int i386bsd_sc_reg_offset
[];
357 /* SystemTap related functions. */
359 extern int i386_stap_is_single_operand (struct gdbarch
*gdbarch
,
362 extern int i386_stap_parse_special_token (struct gdbarch
*gdbarch
,
363 struct stap_parse_info
*p
);
365 #endif /* i386-tdep.h */