1 /* Copyright (C) 2010-2012 Free Software Foundation, Inc.
3 This file is part of GDB.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include <sys/ptrace.h>
25 /* The following two typedefs are defined in a .h file which is not
26 in the standard include path (/sys/include/family/x86/ucontext.h),
27 so we just duplicate them here. */
29 /* General register context */
30 typedef struct usr_econtext
{
54 /* Floating point and SIMD register context */
55 typedef struct usr_fcontext
{
60 uint8_t *ufc_inst_off
;
61 uint32_t ufc_inst_sel
;
62 uint8_t *ufc_data_off
;
63 uint32_t ufc_data_sel
;
65 uint32_t usse_mxcsr_mask
;
76 struct uxmm_register
{
86 char ureserved
[16][14];
89 /* The index of various registers inside the regcache. */
91 enum lynx_i386_gdb_regnum
110 I386_FCTRL_REGNUM
= I386_ST0_REGNUM
+ 8,
118 I386_XMM0_REGNUM
= 32,
119 I386_MXCSR_REGNUM
= I386_XMM0_REGNUM
+ 8,
123 /* Defined in auto-generated file i386.c. */
124 extern void init_registers_i386 (void);
126 /* The fill_function for the general-purpose register set. */
129 lynx_i386_fill_gregset (struct regcache
*regcache
, char *buf
)
131 #define lynx_i386_collect_gp(regnum, fld) \
132 collect_register (regcache, regnum, \
133 buf + offsetof (usr_econtext_t, uec_##fld))
135 lynx_i386_collect_gp (I386_EAX_REGNUM
, eax
);
136 lynx_i386_collect_gp (I386_ECX_REGNUM
, ecx
);
137 lynx_i386_collect_gp (I386_EDX_REGNUM
, edx
);
138 lynx_i386_collect_gp (I386_EBX_REGNUM
, ebx
);
139 lynx_i386_collect_gp (I386_ESP_REGNUM
, esp
);
140 lynx_i386_collect_gp (I386_EBP_REGNUM
, ebp
);
141 lynx_i386_collect_gp (I386_ESI_REGNUM
, esi
);
142 lynx_i386_collect_gp (I386_EDI_REGNUM
, edi
);
143 lynx_i386_collect_gp (I386_EIP_REGNUM
, eip
);
144 lynx_i386_collect_gp (I386_EFLAGS_REGNUM
, eflags
);
145 lynx_i386_collect_gp (I386_CS_REGNUM
, cs
);
146 lynx_i386_collect_gp (I386_SS_REGNUM
, ss
);
147 lynx_i386_collect_gp (I386_DS_REGNUM
, ds
);
148 lynx_i386_collect_gp (I386_ES_REGNUM
, es
);
149 lynx_i386_collect_gp (I386_FS_REGNUM
, fs
);
150 lynx_i386_collect_gp (I386_GS_REGNUM
, gs
);
153 /* The store_function for the general-purpose register set. */
156 lynx_i386_store_gregset (struct regcache
*regcache
, const char *buf
)
158 #define lynx_i386_supply_gp(regnum, fld) \
159 supply_register (regcache, regnum, \
160 buf + offsetof (usr_econtext_t, uec_##fld))
162 lynx_i386_supply_gp (I386_EAX_REGNUM
, eax
);
163 lynx_i386_supply_gp (I386_ECX_REGNUM
, ecx
);
164 lynx_i386_supply_gp (I386_EDX_REGNUM
, edx
);
165 lynx_i386_supply_gp (I386_EBX_REGNUM
, ebx
);
166 lynx_i386_supply_gp (I386_ESP_REGNUM
, esp
);
167 lynx_i386_supply_gp (I386_EBP_REGNUM
, ebp
);
168 lynx_i386_supply_gp (I386_ESI_REGNUM
, esi
);
169 lynx_i386_supply_gp (I386_EDI_REGNUM
, edi
);
170 lynx_i386_supply_gp (I386_EIP_REGNUM
, eip
);
171 lynx_i386_supply_gp (I386_EFLAGS_REGNUM
, eflags
);
172 lynx_i386_supply_gp (I386_CS_REGNUM
, cs
);
173 lynx_i386_supply_gp (I386_SS_REGNUM
, ss
);
174 lynx_i386_supply_gp (I386_DS_REGNUM
, ds
);
175 lynx_i386_supply_gp (I386_ES_REGNUM
, es
);
176 lynx_i386_supply_gp (I386_FS_REGNUM
, fs
);
177 lynx_i386_supply_gp (I386_GS_REGNUM
, gs
);
180 /* Extract the first 16 bits of register REGNUM in the REGCACHE,
181 and store these 2 bytes at DEST.
183 This is useful to collect certain 16bit registers which are known
184 by GDBserver as 32bit registers (such as the Control Register
188 collect_16bit_register (struct regcache
*regcache
, int regnum
, char *dest
)
192 collect_register (regcache
, regnum
, word
);
193 memcpy (dest
, word
, 2);
196 /* The fill_function for the floating-point register set. */
199 lynx_i386_fill_fpregset (struct regcache
*regcache
, char *buf
)
203 /* Collect %st0 .. %st7. */
204 for (i
= 0; i
< 8; i
++)
205 collect_register (regcache
, I386_ST0_REGNUM
+ i
,
206 buf
+ offsetof (usr_fcontext_t
, ufc_reg
)
207 + i
* sizeof (struct ufp387_real
));
209 /* Collect the other FPU registers. */
210 collect_16bit_register (regcache
, I386_FCTRL_REGNUM
,
211 buf
+ offsetof (usr_fcontext_t
, ufc_control
));
212 collect_16bit_register (regcache
, I386_FSTAT_REGNUM
,
213 buf
+ offsetof (usr_fcontext_t
, ufc_status
));
214 collect_16bit_register (regcache
, I386_FTAG_REGNUM
,
215 buf
+ offsetof (usr_fcontext_t
, ufc_tag
));
216 collect_register (regcache
, I386_FISEG_REGNUM
,
217 buf
+ offsetof (usr_fcontext_t
, ufc_inst_sel
));
218 collect_register (regcache
, I386_FIOFF_REGNUM
,
219 buf
+ offsetof (usr_fcontext_t
, ufc_inst_off
));
220 collect_register (regcache
, I386_FOSEG_REGNUM
,
221 buf
+ offsetof (usr_fcontext_t
, ufc_data_sel
));
222 collect_register (regcache
, I386_FOOFF_REGNUM
,
223 buf
+ offsetof (usr_fcontext_t
, ufc_data_off
));
224 collect_16bit_register (regcache
, I386_FOP_REGNUM
,
225 buf
+ offsetof (usr_fcontext_t
, ufc_opcode
));
227 /* Collect the XMM registers. */
228 for (i
= 0; i
< 8; i
++)
229 collect_register (regcache
, I386_XMM0_REGNUM
+ i
,
230 buf
+ offsetof (usr_fcontext_t
, uxmm_reg
)
231 + i
* sizeof (struct uxmm_register
));
232 collect_register (regcache
, I386_MXCSR_REGNUM
,
233 buf
+ offsetof (usr_fcontext_t
, usse_mxcsr
));
236 /* This is the supply counterpart for collect_16bit_register:
237 It extracts a 2byte value from BUF, and uses that value to
238 set REGNUM's value in the regcache.
240 This is useful to supply the value of certain 16bit registers
241 which are known by GDBserver as 32bit registers (such as the Control
242 Register for instance). */
245 supply_16bit_register (struct regcache
*regcache
, int regnum
, const char *buf
)
249 memcpy (word
, buf
, 2);
250 memset (word
+ 2, 0, 2);
251 supply_register (regcache
, regnum
, word
);
254 /* The store_function for the floating-point register set. */
257 lynx_i386_store_fpregset (struct regcache
*regcache
, const char *buf
)
261 /* Store the %st0 .. %st7 registers. */
262 for (i
= 0; i
< 8; i
++)
263 supply_register (regcache
, I386_ST0_REGNUM
+ i
,
264 buf
+ offsetof (usr_fcontext_t
, ufc_reg
)
265 + i
* sizeof (struct ufp387_real
));
267 /* Store the other FPU registers. */
268 supply_16bit_register (regcache
, I386_FCTRL_REGNUM
,
269 buf
+ offsetof (usr_fcontext_t
, ufc_control
));
270 supply_16bit_register (regcache
, I386_FSTAT_REGNUM
,
271 buf
+ offsetof (usr_fcontext_t
, ufc_status
));
272 supply_16bit_register (regcache
, I386_FTAG_REGNUM
,
273 buf
+ offsetof (usr_fcontext_t
, ufc_tag
));
274 supply_register (regcache
, I386_FISEG_REGNUM
,
275 buf
+ offsetof (usr_fcontext_t
, ufc_inst_sel
));
276 supply_register (regcache
, I386_FIOFF_REGNUM
,
277 buf
+ offsetof (usr_fcontext_t
, ufc_inst_off
));
278 supply_register (regcache
, I386_FOSEG_REGNUM
,
279 buf
+ offsetof (usr_fcontext_t
, ufc_data_sel
));
280 supply_register (regcache
, I386_FOOFF_REGNUM
,
281 buf
+ offsetof (usr_fcontext_t
, ufc_data_off
));
282 supply_16bit_register (regcache
, I386_FOP_REGNUM
,
283 buf
+ offsetof (usr_fcontext_t
, ufc_opcode
));
285 /* Store the XMM registers. */
286 for (i
= 0; i
< 8; i
++)
287 supply_register (regcache
, I386_XMM0_REGNUM
+ i
,
288 buf
+ offsetof (usr_fcontext_t
, uxmm_reg
)
289 + i
* sizeof (struct uxmm_register
));
290 supply_register (regcache
, I386_MXCSR_REGNUM
,
291 buf
+ offsetof (usr_fcontext_t
, usse_mxcsr
));
294 /* Implements the lynx_target_ops.arch_setup routine. */
297 lynx_i386_arch_setup (void)
299 init_registers_i386 ();
302 /* Description of all the x86-lynx register sets. */
304 struct lynx_regset_info lynx_target_regsets
[] = {
305 /* General Purpose Registers. */
306 {PTRACE_GETREGS
, PTRACE_SETREGS
, sizeof(usr_econtext_t
),
307 lynx_i386_fill_gregset
, lynx_i386_store_gregset
},
308 /* Floating Point Registers. */
309 { PTRACE_GETFPREGS
, PTRACE_SETFPREGS
, sizeof(usr_fcontext_t
),
310 lynx_i386_fill_fpregset
, lynx_i386_store_fpregset
},
311 /* End of list marker. */
312 {0, 0, -1, NULL
, NULL
}
315 /* The lynx_target_ops vector for x86-lynx. */
317 struct lynx_target_ops the_low_target
= {
318 lynx_i386_arch_setup
,