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871fbe6a | 1 | /* Target-dependent code for GNU/Linux i386. |
ca557f44 | 2 | |
28e7fd62 | 3 | Copyright (C) 2000-2013 Free Software Foundation, Inc. |
e7ee86a9 JB |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
e7ee86a9 JB |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
e7ee86a9 JB |
19 | |
20 | #include "defs.h" | |
21 | #include "gdbcore.h" | |
22 | #include "frame.h" | |
23 | #include "value.h" | |
4e052eda | 24 | #include "regcache.h" |
c131fcee | 25 | #include "regset.h" |
6441c4a0 | 26 | #include "inferior.h" |
0670c0aa | 27 | #include "osabi.h" |
38c968cf | 28 | #include "reggroups.h" |
5cb2fe25 | 29 | #include "dwarf2-frame.h" |
0e9f083f | 30 | #include <string.h> |
4be87837 | 31 | |
8201327c MK |
32 | #include "i386-tdep.h" |
33 | #include "i386-linux-tdep.h" | |
4aa995e1 | 34 | #include "linux-tdep.h" |
0670c0aa | 35 | #include "glibc-tdep.h" |
871fbe6a | 36 | #include "solib-svr4.h" |
982e9687 | 37 | #include "symtab.h" |
237fc4c9 | 38 | #include "arch-utils.h" |
a96d9b2e SDJ |
39 | #include "xml-syscall.h" |
40 | ||
c131fcee L |
41 | #include "i387-tdep.h" |
42 | #include "i386-xstate.h" | |
43 | ||
a96d9b2e SDJ |
44 | /* The syscall's XML filename for i386. */ |
45 | #define XML_SYSCALL_FILENAME_I386 "syscalls/i386-linux.xml" | |
17ea7499 | 46 | |
d02ed0bb | 47 | #include "record-full.h" |
77fcef51 HZ |
48 | #include "linux-record.h" |
49 | #include <stdint.h> | |
50 | ||
90884b2b | 51 | #include "features/i386/i386-linux.c" |
3a13a53b | 52 | #include "features/i386/i386-mmx-linux.c" |
1dbcd68c | 53 | #include "features/i386/i386-mpx-linux.c" |
c131fcee | 54 | #include "features/i386/i386-avx-linux.c" |
90884b2b | 55 | |
17ea7499 CES |
56 | /* Supported register note sections. */ |
57 | static struct core_regset_section i386_linux_regset_sections[] = | |
58 | { | |
e0e0e543 | 59 | { ".reg", 68, "general-purpose" }, |
1b1818e4 | 60 | { ".reg2", 108, "floating-point" }, |
4ac5d44e MK |
61 | { NULL, 0 } |
62 | }; | |
63 | ||
64 | static struct core_regset_section i386_linux_sse_regset_sections[] = | |
65 | { | |
e0e0e543 | 66 | { ".reg", 68, "general-purpose" }, |
1b1818e4 | 67 | { ".reg-xfp", 512, "extended floating-point" }, |
4ac5d44e MK |
68 | { NULL, 0 } |
69 | }; | |
70 | ||
71 | static struct core_regset_section i386_linux_avx_regset_sections[] = | |
72 | { | |
e0e0e543 | 73 | { ".reg", 68, "general-purpose" }, |
c131fcee | 74 | { ".reg-xstate", I386_XSTATE_MAX_SIZE, "XSAVE extended state" }, |
17ea7499 CES |
75 | { NULL, 0 } |
76 | }; | |
8201327c | 77 | |
38c968cf AC |
78 | /* Return non-zero, when the register is in the corresponding register |
79 | group. Put the LINUX_ORIG_EAX register in the system group. */ | |
80 | static int | |
81 | i386_linux_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
82 | struct reggroup *group) | |
83 | { | |
84 | if (regnum == I386_LINUX_ORIG_EAX_REGNUM) | |
85 | return (group == system_reggroup | |
86 | || group == save_reggroup | |
87 | || group == restore_reggroup); | |
88 | return i386_register_reggroup_p (gdbarch, regnum, group); | |
89 | } | |
90 | ||
e7ee86a9 JB |
91 | \f |
92 | /* Recognizing signal handler frames. */ | |
93 | ||
ca557f44 | 94 | /* GNU/Linux has two flavors of signals. Normal signal handlers, and |
e7ee86a9 JB |
95 | "realtime" (RT) signals. The RT signals can provide additional |
96 | information to the signal handler if the SA_SIGINFO flag is set | |
97 | when establishing a signal handler using `sigaction'. It is not | |
ca557f44 AC |
98 | unlikely that future versions of GNU/Linux will support SA_SIGINFO |
99 | for normal signals too. */ | |
e7ee86a9 JB |
100 | |
101 | /* When the i386 Linux kernel calls a signal handler and the | |
102 | SA_RESTORER flag isn't set, the return address points to a bit of | |
103 | code on the stack. This function returns whether the PC appears to | |
104 | be within this bit of code. | |
105 | ||
106 | The instruction sequence for normal signals is | |
107 | pop %eax | |
acd5c798 | 108 | mov $0x77, %eax |
e7ee86a9 JB |
109 | int $0x80 |
110 | or 0x58 0xb8 0x77 0x00 0x00 0x00 0xcd 0x80. | |
111 | ||
112 | Checking for the code sequence should be somewhat reliable, because | |
113 | the effect is to call the system call sigreturn. This is unlikely | |
911bc6ee | 114 | to occur anywhere other than in a signal trampoline. |
e7ee86a9 JB |
115 | |
116 | It kind of sucks that we have to read memory from the process in | |
117 | order to identify a signal trampoline, but there doesn't seem to be | |
911bc6ee MK |
118 | any other way. Therefore we only do the memory reads if no |
119 | function name could be identified, which should be the case since | |
120 | the code is on the stack. | |
e7ee86a9 JB |
121 | |
122 | Detection of signal trampolines for handlers that set the | |
123 | SA_RESTORER flag is in general not possible. Unfortunately this is | |
124 | what the GNU C Library has been doing for quite some time now. | |
125 | However, as of version 2.1.2, the GNU C Library uses signal | |
126 | trampolines (named __restore and __restore_rt) that are identical | |
127 | to the ones used by the kernel. Therefore, these trampolines are | |
128 | supported too. */ | |
129 | ||
acd5c798 MK |
130 | #define LINUX_SIGTRAMP_INSN0 0x58 /* pop %eax */ |
131 | #define LINUX_SIGTRAMP_OFFSET0 0 | |
132 | #define LINUX_SIGTRAMP_INSN1 0xb8 /* mov $NNNN, %eax */ | |
133 | #define LINUX_SIGTRAMP_OFFSET1 1 | |
134 | #define LINUX_SIGTRAMP_INSN2 0xcd /* int */ | |
135 | #define LINUX_SIGTRAMP_OFFSET2 6 | |
e7ee86a9 | 136 | |
4252dc94 | 137 | static const gdb_byte linux_sigtramp_code[] = |
e7ee86a9 JB |
138 | { |
139 | LINUX_SIGTRAMP_INSN0, /* pop %eax */ | |
acd5c798 | 140 | LINUX_SIGTRAMP_INSN1, 0x77, 0x00, 0x00, 0x00, /* mov $0x77, %eax */ |
e7ee86a9 JB |
141 | LINUX_SIGTRAMP_INSN2, 0x80 /* int $0x80 */ |
142 | }; | |
143 | ||
144 | #define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code) | |
145 | ||
10458914 DJ |
146 | /* If THIS_FRAME is a sigtramp routine, return the address of the |
147 | start of the routine. Otherwise, return 0. */ | |
e7ee86a9 JB |
148 | |
149 | static CORE_ADDR | |
10458914 | 150 | i386_linux_sigtramp_start (struct frame_info *this_frame) |
e7ee86a9 | 151 | { |
10458914 | 152 | CORE_ADDR pc = get_frame_pc (this_frame); |
4252dc94 | 153 | gdb_byte buf[LINUX_SIGTRAMP_LEN]; |
e7ee86a9 JB |
154 | |
155 | /* We only recognize a signal trampoline if PC is at the start of | |
156 | one of the three instructions. We optimize for finding the PC at | |
157 | the start, as will be the case when the trampoline is not the | |
158 | first frame on the stack. We assume that in the case where the | |
159 | PC is not at the start of the instruction sequence, there will be | |
160 | a few trailing readable bytes on the stack. */ | |
161 | ||
10458914 | 162 | if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN)) |
e7ee86a9 JB |
163 | return 0; |
164 | ||
165 | if (buf[0] != LINUX_SIGTRAMP_INSN0) | |
166 | { | |
167 | int adjust; | |
168 | ||
169 | switch (buf[0]) | |
170 | { | |
171 | case LINUX_SIGTRAMP_INSN1: | |
172 | adjust = LINUX_SIGTRAMP_OFFSET1; | |
173 | break; | |
174 | case LINUX_SIGTRAMP_INSN2: | |
175 | adjust = LINUX_SIGTRAMP_OFFSET2; | |
176 | break; | |
177 | default: | |
178 | return 0; | |
179 | } | |
180 | ||
181 | pc -= adjust; | |
182 | ||
10458914 | 183 | if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN)) |
e7ee86a9 JB |
184 | return 0; |
185 | } | |
186 | ||
187 | if (memcmp (buf, linux_sigtramp_code, LINUX_SIGTRAMP_LEN) != 0) | |
188 | return 0; | |
189 | ||
190 | return pc; | |
191 | } | |
192 | ||
193 | /* This function does the same for RT signals. Here the instruction | |
194 | sequence is | |
acd5c798 | 195 | mov $0xad, %eax |
e7ee86a9 JB |
196 | int $0x80 |
197 | or 0xb8 0xad 0x00 0x00 0x00 0xcd 0x80. | |
198 | ||
199 | The effect is to call the system call rt_sigreturn. */ | |
200 | ||
acd5c798 MK |
201 | #define LINUX_RT_SIGTRAMP_INSN0 0xb8 /* mov $NNNN, %eax */ |
202 | #define LINUX_RT_SIGTRAMP_OFFSET0 0 | |
203 | #define LINUX_RT_SIGTRAMP_INSN1 0xcd /* int */ | |
204 | #define LINUX_RT_SIGTRAMP_OFFSET1 5 | |
e7ee86a9 | 205 | |
4252dc94 | 206 | static const gdb_byte linux_rt_sigtramp_code[] = |
e7ee86a9 | 207 | { |
acd5c798 | 208 | LINUX_RT_SIGTRAMP_INSN0, 0xad, 0x00, 0x00, 0x00, /* mov $0xad, %eax */ |
e7ee86a9 JB |
209 | LINUX_RT_SIGTRAMP_INSN1, 0x80 /* int $0x80 */ |
210 | }; | |
211 | ||
212 | #define LINUX_RT_SIGTRAMP_LEN (sizeof linux_rt_sigtramp_code) | |
213 | ||
10458914 DJ |
214 | /* If THIS_FRAME is an RT sigtramp routine, return the address of the |
215 | start of the routine. Otherwise, return 0. */ | |
e7ee86a9 JB |
216 | |
217 | static CORE_ADDR | |
10458914 | 218 | i386_linux_rt_sigtramp_start (struct frame_info *this_frame) |
e7ee86a9 | 219 | { |
10458914 | 220 | CORE_ADDR pc = get_frame_pc (this_frame); |
4252dc94 | 221 | gdb_byte buf[LINUX_RT_SIGTRAMP_LEN]; |
e7ee86a9 JB |
222 | |
223 | /* We only recognize a signal trampoline if PC is at the start of | |
224 | one of the two instructions. We optimize for finding the PC at | |
225 | the start, as will be the case when the trampoline is not the | |
226 | first frame on the stack. We assume that in the case where the | |
227 | PC is not at the start of the instruction sequence, there will be | |
228 | a few trailing readable bytes on the stack. */ | |
229 | ||
10458914 | 230 | if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN)) |
e7ee86a9 JB |
231 | return 0; |
232 | ||
233 | if (buf[0] != LINUX_RT_SIGTRAMP_INSN0) | |
234 | { | |
235 | if (buf[0] != LINUX_RT_SIGTRAMP_INSN1) | |
236 | return 0; | |
237 | ||
238 | pc -= LINUX_RT_SIGTRAMP_OFFSET1; | |
239 | ||
10458914 | 240 | if (!safe_frame_unwind_memory (this_frame, pc, buf, |
8e6bed05 | 241 | LINUX_RT_SIGTRAMP_LEN)) |
e7ee86a9 JB |
242 | return 0; |
243 | } | |
244 | ||
245 | if (memcmp (buf, linux_rt_sigtramp_code, LINUX_RT_SIGTRAMP_LEN) != 0) | |
246 | return 0; | |
247 | ||
248 | return pc; | |
249 | } | |
250 | ||
10458914 DJ |
251 | /* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp |
252 | routine. */ | |
e7ee86a9 | 253 | |
8201327c | 254 | static int |
10458914 | 255 | i386_linux_sigtramp_p (struct frame_info *this_frame) |
e7ee86a9 | 256 | { |
10458914 | 257 | CORE_ADDR pc = get_frame_pc (this_frame); |
2c02bd72 | 258 | const char *name; |
911bc6ee MK |
259 | |
260 | find_pc_partial_function (pc, &name, NULL, NULL); | |
261 | ||
ef17e74b DJ |
262 | /* If we have NAME, we can optimize the search. The trampolines are |
263 | named __restore and __restore_rt. However, they aren't dynamically | |
264 | exported from the shared C library, so the trampoline may appear to | |
265 | be part of the preceding function. This should always be sigaction, | |
266 | __sigaction, or __libc_sigaction (all aliases to the same function). */ | |
267 | if (name == NULL || strstr (name, "sigaction") != NULL) | |
10458914 DJ |
268 | return (i386_linux_sigtramp_start (this_frame) != 0 |
269 | || i386_linux_rt_sigtramp_start (this_frame) != 0); | |
ef17e74b DJ |
270 | |
271 | return (strcmp ("__restore", name) == 0 | |
272 | || strcmp ("__restore_rt", name) == 0); | |
e7ee86a9 JB |
273 | } |
274 | ||
4a4e5149 DJ |
275 | /* Return one if the PC of THIS_FRAME is in a signal trampoline which |
276 | may have DWARF-2 CFI. */ | |
12b8a2cb DJ |
277 | |
278 | static int | |
279 | i386_linux_dwarf_signal_frame_p (struct gdbarch *gdbarch, | |
4a4e5149 | 280 | struct frame_info *this_frame) |
12b8a2cb | 281 | { |
4a4e5149 | 282 | CORE_ADDR pc = get_frame_pc (this_frame); |
2c02bd72 | 283 | const char *name; |
12b8a2cb DJ |
284 | |
285 | find_pc_partial_function (pc, &name, NULL, NULL); | |
286 | ||
287 | /* If a vsyscall DSO is in use, the signal trampolines may have these | |
288 | names. */ | |
289 | if (name && (strcmp (name, "__kernel_sigreturn") == 0 | |
290 | || strcmp (name, "__kernel_rt_sigreturn") == 0)) | |
291 | return 1; | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
acd5c798 MK |
296 | /* Offset to struct sigcontext in ucontext, from <asm/ucontext.h>. */ |
297 | #define I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET 20 | |
298 | ||
10458914 DJ |
299 | /* Assuming THIS_FRAME is a GNU/Linux sigtramp routine, return the |
300 | address of the associated sigcontext structure. */ | |
e7ee86a9 | 301 | |
b7d15bf7 | 302 | static CORE_ADDR |
10458914 | 303 | i386_linux_sigcontext_addr (struct frame_info *this_frame) |
e7ee86a9 | 304 | { |
e17a4113 UW |
305 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
306 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
e7ee86a9 | 307 | CORE_ADDR pc; |
acd5c798 | 308 | CORE_ADDR sp; |
4252dc94 | 309 | gdb_byte buf[4]; |
acd5c798 | 310 | |
10458914 | 311 | get_frame_register (this_frame, I386_ESP_REGNUM, buf); |
e17a4113 | 312 | sp = extract_unsigned_integer (buf, 4, byte_order); |
e7ee86a9 | 313 | |
10458914 | 314 | pc = i386_linux_sigtramp_start (this_frame); |
e7ee86a9 JB |
315 | if (pc) |
316 | { | |
acd5c798 MK |
317 | /* The sigcontext structure lives on the stack, right after |
318 | the signum argument. We determine the address of the | |
319 | sigcontext structure by looking at the frame's stack | |
320 | pointer. Keep in mind that the first instruction of the | |
321 | sigtramp code is "pop %eax". If the PC is after this | |
322 | instruction, adjust the returned value accordingly. */ | |
10458914 | 323 | if (pc == get_frame_pc (this_frame)) |
e7ee86a9 JB |
324 | return sp + 4; |
325 | return sp; | |
326 | } | |
327 | ||
10458914 | 328 | pc = i386_linux_rt_sigtramp_start (this_frame); |
e7ee86a9 JB |
329 | if (pc) |
330 | { | |
acd5c798 MK |
331 | CORE_ADDR ucontext_addr; |
332 | ||
333 | /* The sigcontext structure is part of the user context. A | |
334 | pointer to the user context is passed as the third argument | |
335 | to the signal handler. */ | |
336 | read_memory (sp + 8, buf, 4); | |
e17a4113 | 337 | ucontext_addr = extract_unsigned_integer (buf, 4, byte_order); |
acd5c798 | 338 | return ucontext_addr + I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET; |
e7ee86a9 JB |
339 | } |
340 | ||
8a3fe4f8 | 341 | error (_("Couldn't recognize signal trampoline.")); |
e7ee86a9 JB |
342 | return 0; |
343 | } | |
344 | ||
6441c4a0 MK |
345 | /* Set the program counter for process PTID to PC. */ |
346 | ||
8201327c | 347 | static void |
61a1198a | 348 | i386_linux_write_pc (struct regcache *regcache, CORE_ADDR pc) |
6441c4a0 | 349 | { |
61a1198a | 350 | regcache_cooked_write_unsigned (regcache, I386_EIP_REGNUM, pc); |
6441c4a0 MK |
351 | |
352 | /* We must be careful with modifying the program counter. If we | |
353 | just interrupted a system call, the kernel might try to restart | |
354 | it when we resume the inferior. On restarting the system call, | |
355 | the kernel will try backing up the program counter even though it | |
356 | no longer points at the system call. This typically results in a | |
357 | SIGSEGV or SIGILL. We can prevent this by writing `-1' in the | |
358 | "orig_eax" pseudo-register. | |
359 | ||
360 | Note that "orig_eax" is saved when setting up a dummy call frame. | |
361 | This means that it is properly restored when that frame is | |
362 | popped, and that the interrupted system call will be restarted | |
363 | when we resume the inferior on return from a function call from | |
364 | within GDB. In all other cases the system call will not be | |
365 | restarted. */ | |
61a1198a | 366 | regcache_cooked_write_unsigned (regcache, I386_LINUX_ORIG_EAX_REGNUM, -1); |
6441c4a0 | 367 | } |
77fcef51 | 368 | |
8a2e0e28 HZ |
369 | /* Record all registers but IP register for process-record. */ |
370 | ||
371 | static int | |
372 | i386_all_but_ip_registers_record (struct regcache *regcache) | |
373 | { | |
25ea693b | 374 | if (record_full_arch_list_add_reg (regcache, I386_EAX_REGNUM)) |
8a2e0e28 | 375 | return -1; |
25ea693b | 376 | if (record_full_arch_list_add_reg (regcache, I386_ECX_REGNUM)) |
8a2e0e28 | 377 | return -1; |
25ea693b | 378 | if (record_full_arch_list_add_reg (regcache, I386_EDX_REGNUM)) |
8a2e0e28 | 379 | return -1; |
25ea693b | 380 | if (record_full_arch_list_add_reg (regcache, I386_EBX_REGNUM)) |
8a2e0e28 | 381 | return -1; |
25ea693b | 382 | if (record_full_arch_list_add_reg (regcache, I386_ESP_REGNUM)) |
8a2e0e28 | 383 | return -1; |
25ea693b | 384 | if (record_full_arch_list_add_reg (regcache, I386_EBP_REGNUM)) |
8a2e0e28 | 385 | return -1; |
25ea693b | 386 | if (record_full_arch_list_add_reg (regcache, I386_ESI_REGNUM)) |
8a2e0e28 | 387 | return -1; |
25ea693b | 388 | if (record_full_arch_list_add_reg (regcache, I386_EDI_REGNUM)) |
8a2e0e28 | 389 | return -1; |
25ea693b | 390 | if (record_full_arch_list_add_reg (regcache, I386_EFLAGS_REGNUM)) |
8a2e0e28 HZ |
391 | return -1; |
392 | ||
393 | return 0; | |
394 | } | |
13b6d1d4 MS |
395 | |
396 | /* i386_canonicalize_syscall maps from the native i386 Linux set | |
397 | of syscall ids into a canonical set of syscall ids used by | |
398 | process record (a mostly trivial mapping, since the canonical | |
399 | set was originally taken from the i386 set). */ | |
400 | ||
401 | static enum gdb_syscall | |
402 | i386_canonicalize_syscall (int syscall) | |
403 | { | |
404 | enum { i386_syscall_max = 499 }; | |
405 | ||
406 | if (syscall <= i386_syscall_max) | |
407 | return syscall; | |
408 | else | |
409 | return -1; | |
410 | } | |
411 | ||
77fcef51 HZ |
412 | /* Parse the arguments of current system call instruction and record |
413 | the values of the registers and memory that will be changed into | |
414 | "record_arch_list". This instruction is "int 0x80" (Linux | |
415 | Kernel2.4) or "sysenter" (Linux Kernel 2.6). | |
416 | ||
417 | Return -1 if something wrong. */ | |
418 | ||
8a2e0e28 HZ |
419 | static struct linux_record_tdep i386_linux_record_tdep; |
420 | ||
77fcef51 | 421 | static int |
ffdf6de5 | 422 | i386_linux_intx80_sysenter_syscall_record (struct regcache *regcache) |
77fcef51 HZ |
423 | { |
424 | int ret; | |
13b6d1d4 MS |
425 | LONGEST syscall_native; |
426 | enum gdb_syscall syscall_gdb; | |
427 | ||
428 | regcache_raw_read_signed (regcache, I386_EAX_REGNUM, &syscall_native); | |
77fcef51 | 429 | |
13b6d1d4 | 430 | syscall_gdb = i386_canonicalize_syscall (syscall_native); |
2c543fc4 | 431 | |
13b6d1d4 | 432 | if (syscall_gdb < 0) |
2c543fc4 HZ |
433 | { |
434 | printf_unfiltered (_("Process record and replay target doesn't " | |
13b6d1d4 MS |
435 | "support syscall number %s\n"), |
436 | plongest (syscall_native)); | |
2c543fc4 HZ |
437 | return -1; |
438 | } | |
77fcef51 | 439 | |
8a2e0e28 HZ |
440 | if (syscall_gdb == gdb_sys_sigreturn |
441 | || syscall_gdb == gdb_sys_rt_sigreturn) | |
442 | { | |
443 | if (i386_all_but_ip_registers_record (regcache)) | |
444 | return -1; | |
445 | return 0; | |
446 | } | |
447 | ||
13b6d1d4 | 448 | ret = record_linux_system_call (syscall_gdb, regcache, |
77fcef51 HZ |
449 | &i386_linux_record_tdep); |
450 | if (ret) | |
451 | return ret; | |
452 | ||
453 | /* Record the return value of the system call. */ | |
25ea693b | 454 | if (record_full_arch_list_add_reg (regcache, I386_EAX_REGNUM)) |
77fcef51 HZ |
455 | return -1; |
456 | ||
457 | return 0; | |
458 | } | |
8a2e0e28 HZ |
459 | |
460 | #define I386_LINUX_xstate 270 | |
461 | #define I386_LINUX_frame_size 732 | |
462 | ||
70221824 | 463 | static int |
8a2e0e28 HZ |
464 | i386_linux_record_signal (struct gdbarch *gdbarch, |
465 | struct regcache *regcache, | |
2ea28649 | 466 | enum gdb_signal signal) |
8a2e0e28 HZ |
467 | { |
468 | ULONGEST esp; | |
469 | ||
470 | if (i386_all_but_ip_registers_record (regcache)) | |
471 | return -1; | |
472 | ||
25ea693b | 473 | if (record_full_arch_list_add_reg (regcache, I386_EIP_REGNUM)) |
8a2e0e28 HZ |
474 | return -1; |
475 | ||
476 | /* Record the change in the stack. */ | |
477 | regcache_raw_read_unsigned (regcache, I386_ESP_REGNUM, &esp); | |
478 | /* This is for xstate. | |
479 | sp -= sizeof (struct _fpstate); */ | |
480 | esp -= I386_LINUX_xstate; | |
481 | /* This is for frame_size. | |
482 | sp -= sizeof (struct rt_sigframe); */ | |
483 | esp -= I386_LINUX_frame_size; | |
25ea693b MM |
484 | if (record_full_arch_list_add_mem (esp, |
485 | I386_LINUX_xstate + I386_LINUX_frame_size)) | |
8a2e0e28 HZ |
486 | return -1; |
487 | ||
25ea693b | 488 | if (record_full_arch_list_add_end ()) |
8a2e0e28 HZ |
489 | return -1; |
490 | ||
491 | return 0; | |
492 | } | |
6441c4a0 | 493 | \f |
8201327c | 494 | |
9a7f938f JK |
495 | /* Core of the implementation for gdbarch get_syscall_number. Get pending |
496 | syscall number from REGCACHE. If there is no pending syscall -1 will be | |
497 | returned. Pending syscall means ptrace has stepped into the syscall but | |
498 | another ptrace call will step out. PC is right after the int $0x80 | |
499 | / syscall / sysenter instruction in both cases, PC does not change during | |
500 | the second ptrace step. */ | |
501 | ||
a96d9b2e | 502 | static LONGEST |
9a7f938f | 503 | i386_linux_get_syscall_number_from_regcache (struct regcache *regcache) |
a96d9b2e | 504 | { |
9a7f938f | 505 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
a96d9b2e SDJ |
506 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
507 | /* The content of a register. */ | |
508 | gdb_byte buf[4]; | |
509 | /* The result. */ | |
510 | LONGEST ret; | |
511 | ||
512 | /* Getting the system call number from the register. | |
513 | When dealing with x86 architecture, this information | |
514 | is stored at %eax register. */ | |
515 | regcache_cooked_read (regcache, I386_LINUX_ORIG_EAX_REGNUM, buf); | |
516 | ||
517 | ret = extract_signed_integer (buf, 4, byte_order); | |
518 | ||
519 | return ret; | |
520 | } | |
521 | ||
9a7f938f JK |
522 | /* Wrapper for i386_linux_get_syscall_number_from_regcache to make it |
523 | compatible with gdbarch get_syscall_number method prototype. */ | |
524 | ||
525 | static LONGEST | |
526 | i386_linux_get_syscall_number (struct gdbarch *gdbarch, | |
527 | ptid_t ptid) | |
528 | { | |
529 | struct regcache *regcache = get_thread_regcache (ptid); | |
530 | ||
531 | return i386_linux_get_syscall_number_from_regcache (regcache); | |
532 | } | |
533 | ||
e9f1aad5 MK |
534 | /* The register sets used in GNU/Linux ELF core-dumps are identical to |
535 | the register sets in `struct user' that are used for a.out | |
536 | core-dumps. These are also used by ptrace(2). The corresponding | |
537 | types are `elf_gregset_t' for the general-purpose registers (with | |
538 | `elf_greg_t' the type of a single GP register) and `elf_fpregset_t' | |
539 | for the floating-point registers. | |
540 | ||
541 | Those types used to be available under the names `gregset_t' and | |
542 | `fpregset_t' too, and GDB used those names in the past. But those | |
543 | names are now used for the register sets used in the `mcontext_t' | |
544 | type, which have a different size and layout. */ | |
545 | ||
546 | /* Mapping between the general-purpose registers in `struct user' | |
547 | format and GDB's register cache layout. */ | |
548 | ||
549 | /* From <sys/reg.h>. */ | |
be0d2954 | 550 | int i386_linux_gregset_reg_offset[] = |
e9f1aad5 MK |
551 | { |
552 | 6 * 4, /* %eax */ | |
553 | 1 * 4, /* %ecx */ | |
554 | 2 * 4, /* %edx */ | |
555 | 0 * 4, /* %ebx */ | |
556 | 15 * 4, /* %esp */ | |
557 | 5 * 4, /* %ebp */ | |
558 | 3 * 4, /* %esi */ | |
559 | 4 * 4, /* %edi */ | |
560 | 12 * 4, /* %eip */ | |
561 | 14 * 4, /* %eflags */ | |
562 | 13 * 4, /* %cs */ | |
563 | 16 * 4, /* %ss */ | |
564 | 7 * 4, /* %ds */ | |
565 | 8 * 4, /* %es */ | |
566 | 9 * 4, /* %fs */ | |
567 | 10 * 4, /* %gs */ | |
568 | -1, -1, -1, -1, -1, -1, -1, -1, | |
569 | -1, -1, -1, -1, -1, -1, -1, -1, | |
570 | -1, -1, -1, -1, -1, -1, -1, -1, | |
571 | -1, | |
c131fcee | 572 | -1, -1, -1, -1, -1, -1, -1, -1, |
1dbcd68c WT |
573 | -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */ |
574 | -1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */ | |
e9f1aad5 MK |
575 | 11 * 4 /* "orig_eax" */ |
576 | }; | |
577 | ||
578 | /* Mapping between the general-purpose registers in `struct | |
579 | sigcontext' format and GDB's register cache layout. */ | |
580 | ||
a3386186 | 581 | /* From <asm/sigcontext.h>. */ |
bb489b3c | 582 | static int i386_linux_sc_reg_offset[] = |
a3386186 MK |
583 | { |
584 | 11 * 4, /* %eax */ | |
585 | 10 * 4, /* %ecx */ | |
586 | 9 * 4, /* %edx */ | |
587 | 8 * 4, /* %ebx */ | |
588 | 7 * 4, /* %esp */ | |
589 | 6 * 4, /* %ebp */ | |
590 | 5 * 4, /* %esi */ | |
591 | 4 * 4, /* %edi */ | |
592 | 14 * 4, /* %eip */ | |
593 | 16 * 4, /* %eflags */ | |
594 | 15 * 4, /* %cs */ | |
595 | 18 * 4, /* %ss */ | |
596 | 3 * 4, /* %ds */ | |
597 | 2 * 4, /* %es */ | |
598 | 1 * 4, /* %fs */ | |
599 | 0 * 4 /* %gs */ | |
600 | }; | |
601 | ||
c131fcee L |
602 | /* Get XSAVE extended state xcr0 from core dump. */ |
603 | ||
604 | uint64_t | |
6df81a63 | 605 | i386_linux_core_read_xcr0 (bfd *abfd) |
c131fcee L |
606 | { |
607 | asection *xstate = bfd_get_section_by_name (abfd, ".reg-xstate"); | |
608 | uint64_t xcr0; | |
609 | ||
610 | if (xstate) | |
611 | { | |
612 | size_t size = bfd_section_size (abfd, xstate); | |
613 | ||
614 | /* Check extended state size. */ | |
615 | if (size < I386_XSTATE_AVX_SIZE) | |
616 | xcr0 = I386_XSTATE_SSE_MASK; | |
617 | else | |
618 | { | |
619 | char contents[8]; | |
620 | ||
621 | if (! bfd_get_section_contents (abfd, xstate, contents, | |
622 | I386_LINUX_XSAVE_XCR0_OFFSET, | |
623 | 8)) | |
624 | { | |
1777feb0 MS |
625 | warning (_("Couldn't read `xcr0' bytes from " |
626 | "`.reg-xstate' section in core file.")); | |
c131fcee L |
627 | return 0; |
628 | } | |
629 | ||
630 | xcr0 = bfd_get_64 (abfd, contents); | |
631 | } | |
632 | } | |
633 | else | |
f335d1b3 | 634 | xcr0 = 0; |
c131fcee L |
635 | |
636 | return xcr0; | |
637 | } | |
638 | ||
90884b2b L |
639 | /* Get Linux/x86 target description from core dump. */ |
640 | ||
641 | static const struct target_desc * | |
642 | i386_linux_core_read_description (struct gdbarch *gdbarch, | |
643 | struct target_ops *target, | |
644 | bfd *abfd) | |
645 | { | |
90884b2b | 646 | /* Linux/i386. */ |
6df81a63 | 647 | uint64_t xcr0 = i386_linux_core_read_xcr0 (abfd); |
1dbcd68c WT |
648 | |
649 | switch ((xcr0 & I386_XSTATE_ALL_MASK)) | |
f335d1b3 | 650 | { |
1dbcd68c WT |
651 | case I386_XSTATE_MPX_MASK: |
652 | return tdesc_i386_mpx_linux; | |
f335d1b3 L |
653 | case I386_XSTATE_AVX_MASK: |
654 | return tdesc_i386_avx_linux; | |
655 | case I386_XSTATE_SSE_MASK: | |
656 | return tdesc_i386_linux; | |
657 | case I386_XSTATE_X87_MASK: | |
658 | return tdesc_i386_mmx_linux; | |
659 | default: | |
660 | break; | |
661 | } | |
662 | ||
663 | if (bfd_get_section_by_name (abfd, ".reg-xfp") != NULL) | |
c131fcee | 664 | return tdesc_i386_linux; |
f335d1b3 L |
665 | else |
666 | return tdesc_i386_mmx_linux; | |
90884b2b L |
667 | } |
668 | ||
9a7f938f JK |
669 | /* Linux kernel shows PC value after the 'int $0x80' instruction even if |
670 | inferior is still inside the syscall. On next PTRACE_SINGLESTEP it will | |
671 | finish the syscall but PC will not change. | |
672 | ||
673 | Some vDSOs contain 'int $0x80; ret' and during stepping out of the syscall | |
674 | i386_displaced_step_fixup would keep PC at the displaced pad location. | |
675 | As PC is pointing to the 'ret' instruction before the step | |
676 | i386_displaced_step_fixup would expect inferior has just executed that 'ret' | |
677 | and PC should not be adjusted. In reality it finished syscall instead and | |
678 | PC should get relocated back to its vDSO address. Hide the 'ret' | |
679 | instruction by 'nop' so that i386_displaced_step_fixup is not confused. | |
680 | ||
681 | It is not fully correct as the bytes in struct displaced_step_closure will | |
682 | not match the inferior code. But we would need some new flag in | |
683 | displaced_step_closure otherwise to keep the state that syscall is finishing | |
684 | for the later i386_displaced_step_fixup execution as the syscall execution | |
685 | is already no longer detectable there. The new flag field would mean | |
686 | i386-linux-tdep.c needs to wrap all the displacement methods of i386-tdep.c | |
687 | which does not seem worth it. The same effect is achieved by patching that | |
688 | 'nop' instruction there instead. */ | |
689 | ||
693be288 | 690 | static struct displaced_step_closure * |
9a7f938f JK |
691 | i386_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, |
692 | CORE_ADDR from, CORE_ADDR to, | |
693 | struct regcache *regs) | |
694 | { | |
695 | struct displaced_step_closure *closure; | |
696 | ||
697 | closure = i386_displaced_step_copy_insn (gdbarch, from, to, regs); | |
698 | ||
699 | if (i386_linux_get_syscall_number_from_regcache (regs) != -1) | |
700 | { | |
701 | /* Since we use simple_displaced_step_copy_insn, our closure is a | |
702 | copy of the instruction. */ | |
703 | gdb_byte *insn = (gdb_byte *) closure; | |
704 | ||
705 | /* Fake nop. */ | |
706 | insn[0] = 0x90; | |
707 | } | |
708 | ||
709 | return closure; | |
710 | } | |
711 | ||
8201327c MK |
712 | static void |
713 | i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
714 | { | |
715 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
90884b2b L |
716 | const struct target_desc *tdesc = info.target_desc; |
717 | struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info; | |
718 | const struct tdesc_feature *feature; | |
719 | int valid_p; | |
720 | ||
721 | gdb_assert (tdesc_data); | |
8201327c | 722 | |
a5ee0f0c PA |
723 | linux_init_abi (info, gdbarch); |
724 | ||
8201327c MK |
725 | /* GNU/Linux uses ELF. */ |
726 | i386_elf_init_abi (info, gdbarch); | |
727 | ||
90884b2b L |
728 | /* Reserve a number for orig_eax. */ |
729 | set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS); | |
730 | ||
731 | if (! tdesc_has_registers (tdesc)) | |
732 | tdesc = tdesc_i386_linux; | |
733 | tdep->tdesc = tdesc; | |
734 | ||
735 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux"); | |
736 | if (feature == NULL) | |
737 | return; | |
8201327c | 738 | |
90884b2b L |
739 | valid_p = tdesc_numbered_register (feature, tdesc_data, |
740 | I386_LINUX_ORIG_EAX_REGNUM, | |
741 | "orig_eax"); | |
742 | if (!valid_p) | |
743 | return; | |
744 | ||
745 | /* Add the %orig_eax register used for syscall restarting. */ | |
8201327c | 746 | set_gdbarch_write_pc (gdbarch, i386_linux_write_pc); |
90884b2b L |
747 | |
748 | tdep->register_reggroup_p = i386_linux_register_reggroup_p; | |
8201327c | 749 | |
e9f1aad5 MK |
750 | tdep->gregset_reg_offset = i386_linux_gregset_reg_offset; |
751 | tdep->gregset_num_regs = ARRAY_SIZE (i386_linux_gregset_reg_offset); | |
752 | tdep->sizeof_gregset = 17 * 4; | |
753 | ||
8201327c MK |
754 | tdep->jb_pc_offset = 20; /* From <bits/setjmp.h>. */ |
755 | ||
911bc6ee | 756 | tdep->sigtramp_p = i386_linux_sigtramp_p; |
b7d15bf7 | 757 | tdep->sigcontext_addr = i386_linux_sigcontext_addr; |
a3386186 | 758 | tdep->sc_reg_offset = i386_linux_sc_reg_offset; |
bb489b3c | 759 | tdep->sc_num_regs = ARRAY_SIZE (i386_linux_sc_reg_offset); |
8201327c | 760 | |
c131fcee L |
761 | tdep->xsave_xcr0_offset = I386_LINUX_XSAVE_XCR0_OFFSET; |
762 | ||
a6b808b4 | 763 | set_gdbarch_process_record (gdbarch, i386_process_record); |
8a2e0e28 | 764 | set_gdbarch_process_record_signal (gdbarch, i386_linux_record_signal); |
a6b808b4 | 765 | |
77fcef51 | 766 | /* Initialize the i386_linux_record_tdep. */ |
5e31abdf HZ |
767 | /* These values are the size of the type that will be used in a system |
768 | call. They are obtained from Linux Kernel source. */ | |
2c543fc4 HZ |
769 | i386_linux_record_tdep.size_pointer |
770 | = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT; | |
5e31abdf HZ |
771 | i386_linux_record_tdep.size__old_kernel_stat = 32; |
772 | i386_linux_record_tdep.size_tms = 16; | |
773 | i386_linux_record_tdep.size_loff_t = 8; | |
774 | i386_linux_record_tdep.size_flock = 16; | |
775 | i386_linux_record_tdep.size_oldold_utsname = 45; | |
776 | i386_linux_record_tdep.size_ustat = 20; | |
777 | i386_linux_record_tdep.size_old_sigaction = 140; | |
778 | i386_linux_record_tdep.size_old_sigset_t = 128; | |
779 | i386_linux_record_tdep.size_rlimit = 8; | |
780 | i386_linux_record_tdep.size_rusage = 72; | |
781 | i386_linux_record_tdep.size_timeval = 8; | |
782 | i386_linux_record_tdep.size_timezone = 8; | |
783 | i386_linux_record_tdep.size_old_gid_t = 2; | |
784 | i386_linux_record_tdep.size_old_uid_t = 2; | |
785 | i386_linux_record_tdep.size_fd_set = 128; | |
786 | i386_linux_record_tdep.size_dirent = 268; | |
787 | i386_linux_record_tdep.size_dirent64 = 276; | |
788 | i386_linux_record_tdep.size_statfs = 64; | |
789 | i386_linux_record_tdep.size_statfs64 = 84; | |
790 | i386_linux_record_tdep.size_sockaddr = 16; | |
2c543fc4 HZ |
791 | i386_linux_record_tdep.size_int |
792 | = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT; | |
793 | i386_linux_record_tdep.size_long | |
794 | = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; | |
795 | i386_linux_record_tdep.size_ulong | |
796 | = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; | |
5e31abdf HZ |
797 | i386_linux_record_tdep.size_msghdr = 28; |
798 | i386_linux_record_tdep.size_itimerval = 16; | |
799 | i386_linux_record_tdep.size_stat = 88; | |
800 | i386_linux_record_tdep.size_old_utsname = 325; | |
801 | i386_linux_record_tdep.size_sysinfo = 64; | |
802 | i386_linux_record_tdep.size_msqid_ds = 88; | |
803 | i386_linux_record_tdep.size_shmid_ds = 84; | |
804 | i386_linux_record_tdep.size_new_utsname = 390; | |
805 | i386_linux_record_tdep.size_timex = 128; | |
806 | i386_linux_record_tdep.size_mem_dqinfo = 24; | |
807 | i386_linux_record_tdep.size_if_dqblk = 68; | |
808 | i386_linux_record_tdep.size_fs_quota_stat = 68; | |
809 | i386_linux_record_tdep.size_timespec = 8; | |
810 | i386_linux_record_tdep.size_pollfd = 8; | |
811 | i386_linux_record_tdep.size_NFS_FHSIZE = 32; | |
812 | i386_linux_record_tdep.size_knfsd_fh = 132; | |
813 | i386_linux_record_tdep.size_TASK_COMM_LEN = 16; | |
814 | i386_linux_record_tdep.size_sigaction = 140; | |
815 | i386_linux_record_tdep.size_sigset_t = 8; | |
816 | i386_linux_record_tdep.size_siginfo_t = 128; | |
817 | i386_linux_record_tdep.size_cap_user_data_t = 12; | |
818 | i386_linux_record_tdep.size_stack_t = 12; | |
819 | i386_linux_record_tdep.size_off_t = i386_linux_record_tdep.size_long; | |
820 | i386_linux_record_tdep.size_stat64 = 96; | |
821 | i386_linux_record_tdep.size_gid_t = 2; | |
822 | i386_linux_record_tdep.size_uid_t = 2; | |
823 | i386_linux_record_tdep.size_PAGE_SIZE = 4096; | |
824 | i386_linux_record_tdep.size_flock64 = 24; | |
825 | i386_linux_record_tdep.size_user_desc = 16; | |
826 | i386_linux_record_tdep.size_io_event = 32; | |
827 | i386_linux_record_tdep.size_iocb = 64; | |
828 | i386_linux_record_tdep.size_epoll_event = 12; | |
2c543fc4 HZ |
829 | i386_linux_record_tdep.size_itimerspec |
830 | = i386_linux_record_tdep.size_timespec * 2; | |
5e31abdf HZ |
831 | i386_linux_record_tdep.size_mq_attr = 32; |
832 | i386_linux_record_tdep.size_siginfo = 128; | |
833 | i386_linux_record_tdep.size_termios = 36; | |
834 | i386_linux_record_tdep.size_termios2 = 44; | |
835 | i386_linux_record_tdep.size_pid_t = 4; | |
836 | i386_linux_record_tdep.size_winsize = 8; | |
837 | i386_linux_record_tdep.size_serial_struct = 60; | |
838 | i386_linux_record_tdep.size_serial_icounter_struct = 80; | |
839 | i386_linux_record_tdep.size_hayes_esp_config = 12; | |
2c543fc4 HZ |
840 | i386_linux_record_tdep.size_size_t = 4; |
841 | i386_linux_record_tdep.size_iovec = 8; | |
5e31abdf HZ |
842 | |
843 | /* These values are the second argument of system call "sys_ioctl". | |
844 | They are obtained from Linux Kernel source. */ | |
845 | i386_linux_record_tdep.ioctl_TCGETS = 0x5401; | |
846 | i386_linux_record_tdep.ioctl_TCSETS = 0x5402; | |
847 | i386_linux_record_tdep.ioctl_TCSETSW = 0x5403; | |
848 | i386_linux_record_tdep.ioctl_TCSETSF = 0x5404; | |
849 | i386_linux_record_tdep.ioctl_TCGETA = 0x5405; | |
850 | i386_linux_record_tdep.ioctl_TCSETA = 0x5406; | |
851 | i386_linux_record_tdep.ioctl_TCSETAW = 0x5407; | |
852 | i386_linux_record_tdep.ioctl_TCSETAF = 0x5408; | |
853 | i386_linux_record_tdep.ioctl_TCSBRK = 0x5409; | |
854 | i386_linux_record_tdep.ioctl_TCXONC = 0x540A; | |
855 | i386_linux_record_tdep.ioctl_TCFLSH = 0x540B; | |
856 | i386_linux_record_tdep.ioctl_TIOCEXCL = 0x540C; | |
857 | i386_linux_record_tdep.ioctl_TIOCNXCL = 0x540D; | |
858 | i386_linux_record_tdep.ioctl_TIOCSCTTY = 0x540E; | |
859 | i386_linux_record_tdep.ioctl_TIOCGPGRP = 0x540F; | |
860 | i386_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410; | |
861 | i386_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411; | |
862 | i386_linux_record_tdep.ioctl_TIOCSTI = 0x5412; | |
863 | i386_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413; | |
864 | i386_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414; | |
865 | i386_linux_record_tdep.ioctl_TIOCMGET = 0x5415; | |
866 | i386_linux_record_tdep.ioctl_TIOCMBIS = 0x5416; | |
867 | i386_linux_record_tdep.ioctl_TIOCMBIC = 0x5417; | |
868 | i386_linux_record_tdep.ioctl_TIOCMSET = 0x5418; | |
869 | i386_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419; | |
870 | i386_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541A; | |
871 | i386_linux_record_tdep.ioctl_FIONREAD = 0x541B; | |
872 | i386_linux_record_tdep.ioctl_TIOCINQ = i386_linux_record_tdep.ioctl_FIONREAD; | |
873 | i386_linux_record_tdep.ioctl_TIOCLINUX = 0x541C; | |
874 | i386_linux_record_tdep.ioctl_TIOCCONS = 0x541D; | |
875 | i386_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541E; | |
876 | i386_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541F; | |
877 | i386_linux_record_tdep.ioctl_TIOCPKT = 0x5420; | |
878 | i386_linux_record_tdep.ioctl_FIONBIO = 0x5421; | |
879 | i386_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422; | |
880 | i386_linux_record_tdep.ioctl_TIOCSETD = 0x5423; | |
881 | i386_linux_record_tdep.ioctl_TIOCGETD = 0x5424; | |
882 | i386_linux_record_tdep.ioctl_TCSBRKP = 0x5425; | |
883 | i386_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426; | |
884 | i386_linux_record_tdep.ioctl_TIOCSBRK = 0x5427; | |
885 | i386_linux_record_tdep.ioctl_TIOCCBRK = 0x5428; | |
886 | i386_linux_record_tdep.ioctl_TIOCGSID = 0x5429; | |
887 | i386_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a; | |
888 | i386_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b; | |
889 | i386_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c; | |
890 | i386_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d; | |
891 | i386_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430; | |
892 | i386_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431; | |
893 | i386_linux_record_tdep.ioctl_FIONCLEX = 0x5450; | |
894 | i386_linux_record_tdep.ioctl_FIOCLEX = 0x5451; | |
895 | i386_linux_record_tdep.ioctl_FIOASYNC = 0x5452; | |
896 | i386_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453; | |
897 | i386_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454; | |
898 | i386_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455; | |
899 | i386_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456; | |
900 | i386_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457; | |
901 | i386_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458; | |
902 | i386_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459; | |
903 | i386_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545A; | |
904 | i386_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545B; | |
905 | i386_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545C; | |
906 | i386_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545D; | |
907 | i386_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545E; | |
908 | i386_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545F; | |
909 | i386_linux_record_tdep.ioctl_FIOQSIZE = 0x5460; | |
910 | ||
911 | /* These values are the second argument of system call "sys_fcntl" | |
912 | and "sys_fcntl64". They are obtained from Linux Kernel source. */ | |
913 | i386_linux_record_tdep.fcntl_F_GETLK = 5; | |
914 | i386_linux_record_tdep.fcntl_F_GETLK64 = 12; | |
915 | i386_linux_record_tdep.fcntl_F_SETLK64 = 13; | |
916 | i386_linux_record_tdep.fcntl_F_SETLKW64 = 14; | |
50ef67b3 | 917 | |
77fcef51 HZ |
918 | i386_linux_record_tdep.arg1 = I386_EBX_REGNUM; |
919 | i386_linux_record_tdep.arg2 = I386_ECX_REGNUM; | |
920 | i386_linux_record_tdep.arg3 = I386_EDX_REGNUM; | |
921 | i386_linux_record_tdep.arg4 = I386_ESI_REGNUM; | |
922 | i386_linux_record_tdep.arg5 = I386_EDI_REGNUM; | |
2c543fc4 | 923 | i386_linux_record_tdep.arg6 = I386_EBP_REGNUM; |
77fcef51 | 924 | |
ffdf6de5 JK |
925 | tdep->i386_intx80_record = i386_linux_intx80_sysenter_syscall_record; |
926 | tdep->i386_sysenter_record = i386_linux_intx80_sysenter_syscall_record; | |
927 | tdep->i386_syscall_record = i386_linux_intx80_sysenter_syscall_record; | |
77fcef51 | 928 | |
203c3895 | 929 | /* N_FUN symbols in shared libaries have 0 for their values and need |
1777feb0 | 930 | to be relocated. */ |
203c3895 UW |
931 | set_gdbarch_sofun_address_maybe_missing (gdbarch, 1); |
932 | ||
871fbe6a | 933 | /* GNU/Linux uses SVR4-style shared libraries. */ |
982e9687 | 934 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
871fbe6a MK |
935 | set_solib_svr4_fetch_link_map_offsets |
936 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
937 | ||
938 | /* GNU/Linux uses the dynamic linker included in the GNU C Library. */ | |
bb41a796 | 939 | set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); |
12b8a2cb DJ |
940 | |
941 | dwarf2_frame_set_signal_frame_p (gdbarch, i386_linux_dwarf_signal_frame_p); | |
b2756930 KB |
942 | |
943 | /* Enable TLS support. */ | |
944 | set_gdbarch_fetch_tls_load_module_address (gdbarch, | |
945 | svr4_fetch_objfile_link_map); | |
237fc4c9 | 946 | |
17ea7499 | 947 | /* Install supported register note sections. */ |
4ac5d44e MK |
948 | if (tdesc_find_feature (tdesc, "org.gnu.gdb.i386.avx")) |
949 | set_gdbarch_core_regset_sections (gdbarch, i386_linux_avx_regset_sections); | |
950 | else if (tdesc_find_feature (tdesc, "org.gnu.gdb.i386.sse")) | |
951 | set_gdbarch_core_regset_sections (gdbarch, i386_linux_sse_regset_sections); | |
952 | else | |
953 | set_gdbarch_core_regset_sections (gdbarch, i386_linux_regset_sections); | |
17ea7499 | 954 | |
90884b2b L |
955 | set_gdbarch_core_read_description (gdbarch, |
956 | i386_linux_core_read_description); | |
957 | ||
237fc4c9 PA |
958 | /* Displaced stepping. */ |
959 | set_gdbarch_displaced_step_copy_insn (gdbarch, | |
9a7f938f | 960 | i386_linux_displaced_step_copy_insn); |
237fc4c9 PA |
961 | set_gdbarch_displaced_step_fixup (gdbarch, i386_displaced_step_fixup); |
962 | set_gdbarch_displaced_step_free_closure (gdbarch, | |
963 | simple_displaced_step_free_closure); | |
964 | set_gdbarch_displaced_step_location (gdbarch, | |
965 | displaced_step_at_entry_point); | |
4aa995e1 | 966 | |
a96d9b2e SDJ |
967 | /* Functions for 'catch syscall'. */ |
968 | set_xml_syscall_file_name (XML_SYSCALL_FILENAME_I386); | |
969 | set_gdbarch_get_syscall_number (gdbarch, | |
970 | i386_linux_get_syscall_number); | |
971 | ||
4aa995e1 | 972 | set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |
8201327c MK |
973 | } |
974 | ||
975 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
976 | extern void _initialize_i386_linux_tdep (void); | |
977 | ||
978 | void | |
979 | _initialize_i386_linux_tdep (void) | |
980 | { | |
05816f70 | 981 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LINUX, |
8201327c | 982 | i386_linux_init_abi); |
90884b2b | 983 | |
1777feb0 | 984 | /* Initialize the Linux target description. */ |
90884b2b | 985 | initialize_tdesc_i386_linux (); |
3a13a53b | 986 | initialize_tdesc_i386_mmx_linux (); |
c131fcee | 987 | initialize_tdesc_i386_avx_linux (); |
1dbcd68c | 988 | initialize_tdesc_i386_mpx_linux (); |
8201327c | 989 | } |