Commit | Line | Data |
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a4b6fc86 | 1 | /* Native-dependent code for GNU/Linux x86-64. |
0a65a603 | 2 | |
0fb0cc75 | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
f973ed9c | 4 | Free Software Foundation, Inc. |
53e95fcf JS |
5 | Contributed by Jiri Smid, SuSE Labs. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
53e95fcf JS |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
53e95fcf JS |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "gdbcore.h" | |
25 | #include "regcache.h" | |
4056d258 | 26 | #include "linux-nat.h" |
8695c747 | 27 | #include "amd64-linux-tdep.h" |
c4f35dd8 | 28 | |
53e95fcf | 29 | #include "gdb_assert.h" |
30d52491 | 30 | #include "gdb_string.h" |
53e95fcf JS |
31 | #include <sys/ptrace.h> |
32 | #include <sys/debugreg.h> | |
33 | #include <sys/syscall.h> | |
34 | #include <sys/procfs.h> | |
c43af07c EZ |
35 | #include <asm/prctl.h> |
36 | /* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after | |
37 | <asm/ptrace.h> because the latter redefines FS and GS for no apparent | |
38 | reason, and those definitions don't match the ones that libpthread_db | |
39 | uses, which come from <sys/reg.h>. */ | |
40 | /* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have | |
41 | been removed from ptrace.h in the kernel. However, better safe than | |
42 | sorry. */ | |
43 | #include <asm/ptrace.h> | |
33a0a2ac | 44 | #include <sys/reg.h> |
c43af07c | 45 | #include "gdb_proc_service.h" |
33a0a2ac | 46 | |
c4f35dd8 MK |
47 | /* Prototypes for supply_gregset etc. */ |
48 | #include "gregset.h" | |
49 | ||
9c1488cb | 50 | #include "amd64-tdep.h" |
60fac5b8 MK |
51 | #include "i386-linux-tdep.h" |
52 | #include "amd64-nat.h" | |
53 | ||
54 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 | |
55 | `struct user' format and GDB's register cache layout. */ | |
56 | ||
430eaf2e | 57 | static int amd64_linux_gregset64_reg_offset[] = |
60fac5b8 MK |
58 | { |
59 | RAX * 8, RBX * 8, /* %rax, %rbx */ | |
60 | RCX * 8, RDX * 8, /* %rcx, %rdx */ | |
61 | RSI * 8, RDI * 8, /* %rsi, %rdi */ | |
62 | RBP * 8, RSP * 8, /* %rbp, %rsp */ | |
63 | R8 * 8, R9 * 8, /* %r8 ... */ | |
64 | R10 * 8, R11 * 8, | |
65 | R12 * 8, R13 * 8, | |
66 | R14 * 8, R15 * 8, /* ... %r15 */ | |
67 | RIP * 8, EFLAGS * 8, /* %rip, %eflags */ | |
af233647 | 68 | CS * 8, SS * 8, /* %cs, %ss */ |
60fac5b8 | 69 | DS * 8, ES * 8, /* %ds, %es */ |
8695c747 DJ |
70 | FS * 8, GS * 8, /* %fs, %gs */ |
71 | -1, -1, -1, -1, -1, -1, -1, -1, | |
72 | -1, -1, -1, -1, -1, -1, -1, -1, | |
73 | -1, -1, -1, -1, -1, -1, -1, -1, | |
74 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
75 | ORIG_RAX * 8 | |
60fac5b8 MK |
76 | }; |
77 | \f | |
78 | ||
79 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 | |
80 | `struct user' format and GDB's register cache layout for GNU/Linux | |
81 | i386. | |
82 | ||
83 | Note that most GNU/Linux x86-64 registers are 64-bit, while the | |
84 | GNU/Linux i386 registers are all 32-bit, but since we're | |
85 | little-endian we get away with that. */ | |
86 | ||
87 | /* From <sys/reg.h> on GNU/Linux i386. */ | |
430eaf2e | 88 | static int amd64_linux_gregset32_reg_offset[] = |
60fac5b8 | 89 | { |
f5859b4d MK |
90 | RAX * 8, RCX * 8, /* %eax, %ecx */ |
91 | RDX * 8, RBX * 8, /* %edx, %ebx */ | |
92 | RSP * 8, RBP * 8, /* %esp, %ebp */ | |
93 | RSI * 8, RDI * 8, /* %esi, %edi */ | |
94 | RIP * 8, EFLAGS * 8, /* %eip, %eflags */ | |
95 | CS * 8, SS * 8, /* %cs, %ss */ | |
96 | DS * 8, ES * 8, /* %ds, %es */ | |
97 | FS * 8, GS * 8, /* %fs, %gs */ | |
60fac5b8 MK |
98 | -1, -1, -1, -1, -1, -1, -1, -1, |
99 | -1, -1, -1, -1, -1, -1, -1, -1, | |
100 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
f5859b4d | 101 | ORIG_RAX * 8 /* "orig_eax" */ |
60fac5b8 | 102 | }; |
53e95fcf JS |
103 | \f |
104 | ||
105 | /* Transfering the general-purpose registers between GDB, inferiors | |
106 | and core files. */ | |
107 | ||
60fac5b8 | 108 | /* Fill GDB's register cache with the general-purpose register values |
53e95fcf JS |
109 | in *GREGSETP. */ |
110 | ||
111 | void | |
7f7fe91e | 112 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
53e95fcf | 113 | { |
7f7fe91e | 114 | amd64_supply_native_gregset (regcache, gregsetp, -1); |
53e95fcf JS |
115 | } |
116 | ||
60fac5b8 MK |
117 | /* Fill register REGNUM (if it is a general-purpose register) in |
118 | *GREGSETP with the value in GDB's register cache. If REGNUM is -1, | |
53e95fcf JS |
119 | do this for all registers. */ |
120 | ||
121 | void | |
7f7fe91e UW |
122 | fill_gregset (const struct regcache *regcache, |
123 | elf_gregset_t *gregsetp, int regnum) | |
53e95fcf | 124 | { |
7f7fe91e | 125 | amd64_collect_native_gregset (regcache, gregsetp, regnum); |
53e95fcf JS |
126 | } |
127 | ||
53e95fcf JS |
128 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
129 | ||
60fac5b8 | 130 | /* Fill GDB's register cache with the floating-point and SSE register |
c4f35dd8 | 131 | values in *FPREGSETP. */ |
53e95fcf JS |
132 | |
133 | void | |
7f7fe91e | 134 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
53e95fcf | 135 | { |
7f7fe91e | 136 | amd64_supply_fxsave (regcache, -1, fpregsetp); |
53e95fcf JS |
137 | } |
138 | ||
8dda9770 | 139 | /* Fill register REGNUM (if it is a floating-point or SSE register) in |
60fac5b8 | 140 | *FPREGSETP with the value in GDB's register cache. If REGNUM is |
c4f35dd8 | 141 | -1, do this for all registers. */ |
53e95fcf JS |
142 | |
143 | void | |
7f7fe91e UW |
144 | fill_fpregset (const struct regcache *regcache, |
145 | elf_fpregset_t *fpregsetp, int regnum) | |
53e95fcf | 146 | { |
7f7fe91e | 147 | amd64_collect_fxsave (regcache, regnum, fpregsetp); |
53e95fcf | 148 | } |
53e95fcf JS |
149 | \f |
150 | ||
151 | /* Transferring arbitrary registers between GDB and inferior. */ | |
152 | ||
60fac5b8 | 153 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
53e95fcf JS |
154 | this for all registers (including the floating point and SSE |
155 | registers). */ | |
156 | ||
10d6c8cd | 157 | static void |
28439f5e PA |
158 | amd64_linux_fetch_inferior_registers (struct target_ops *ops, |
159 | struct regcache *regcache, int regnum) | |
53e95fcf | 160 | { |
f8028488 | 161 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
162 | int tid; |
163 | ||
a4b6fc86 | 164 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
165 | tid = TIDGET (inferior_ptid); |
166 | if (tid == 0) | |
167 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 168 | |
f8028488 | 169 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 170 | { |
99679982 MK |
171 | elf_gregset_t regs; |
172 | ||
173 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 174 | perror_with_name (_("Couldn't get registers")); |
99679982 | 175 | |
56be3814 | 176 | amd64_supply_native_gregset (regcache, ®s, -1); |
60fac5b8 MK |
177 | if (regnum != -1) |
178 | return; | |
53e95fcf JS |
179 | } |
180 | ||
f8028488 | 181 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 182 | { |
99679982 | 183 | elf_fpregset_t fpregs; |
53e95fcf | 184 | |
99679982 | 185 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) |
edefbb7c | 186 | perror_with_name (_("Couldn't get floating point status")); |
99679982 | 187 | |
56be3814 | 188 | amd64_supply_fxsave (regcache, -1, &fpregs); |
99679982 | 189 | } |
53e95fcf JS |
190 | } |
191 | ||
60fac5b8 MK |
192 | /* Store register REGNUM back into the child process. If REGNUM is |
193 | -1, do this for all registers (including the floating-point and SSE | |
53e95fcf | 194 | registers). */ |
c4f35dd8 | 195 | |
10d6c8cd | 196 | static void |
28439f5e PA |
197 | amd64_linux_store_inferior_registers (struct target_ops *ops, |
198 | struct regcache *regcache, int regnum) | |
53e95fcf | 199 | { |
f8028488 | 200 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
201 | int tid; |
202 | ||
a4b6fc86 | 203 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
204 | tid = TIDGET (inferior_ptid); |
205 | if (tid == 0) | |
206 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 207 | |
f8028488 | 208 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 209 | { |
99679982 MK |
210 | elf_gregset_t regs; |
211 | ||
212 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 213 | perror_with_name (_("Couldn't get registers")); |
99679982 | 214 | |
56be3814 | 215 | amd64_collect_native_gregset (regcache, ®s, regnum); |
99679982 MK |
216 | |
217 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 218 | perror_with_name (_("Couldn't write registers")); |
99679982 | 219 | |
60fac5b8 MK |
220 | if (regnum != -1) |
221 | return; | |
53e95fcf JS |
222 | } |
223 | ||
f8028488 | 224 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 225 | { |
99679982 MK |
226 | elf_fpregset_t fpregs; |
227 | ||
228 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) | |
edefbb7c | 229 | perror_with_name (_("Couldn't get floating point status")); |
99679982 | 230 | |
56be3814 | 231 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
99679982 MK |
232 | |
233 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0) | |
edefbb7c | 234 | perror_with_name (_("Couldn't write floating point status")); |
99679982 | 235 | |
53e95fcf JS |
236 | return; |
237 | } | |
53e95fcf JS |
238 | } |
239 | \f | |
9f0bdab8 DJ |
240 | /* Support for debug registers. */ |
241 | ||
242 | static unsigned long amd64_linux_dr[DR_CONTROL + 1]; | |
53e95fcf | 243 | |
c4f35dd8 | 244 | static unsigned long |
9f0bdab8 | 245 | amd64_linux_dr_get (ptid_t ptid, int regnum) |
c4f35dd8 MK |
246 | { |
247 | int tid; | |
248 | unsigned long value; | |
53e95fcf | 249 | |
9f0bdab8 DJ |
250 | tid = TIDGET (ptid); |
251 | if (tid == 0) | |
252 | tid = PIDGET (ptid); | |
53e95fcf | 253 | |
c4f35dd8 MK |
254 | /* FIXME: kettenis/2001-03-27: Calling perror_with_name if the |
255 | ptrace call fails breaks debugging remote targets. The correct | |
256 | way to fix this is to add the hardware breakpoint and watchpoint | |
9f0bdab8 | 257 | stuff to the target vector. For now, just return zero if the |
c4f35dd8 MK |
258 | ptrace call fails. */ |
259 | errno = 0; | |
9f0bdab8 | 260 | value = ptrace (PTRACE_PEEKUSER, tid, |
c4f35dd8 MK |
261 | offsetof (struct user, u_debugreg[regnum]), 0); |
262 | if (errno != 0) | |
263 | #if 0 | |
edefbb7c | 264 | perror_with_name (_("Couldn't read debug register")); |
c4f35dd8 MK |
265 | #else |
266 | return 0; | |
53e95fcf JS |
267 | #endif |
268 | ||
c4f35dd8 MK |
269 | return value; |
270 | } | |
53e95fcf JS |
271 | |
272 | static void | |
9f0bdab8 | 273 | amd64_linux_dr_set (ptid_t ptid, int regnum, unsigned long value) |
53e95fcf | 274 | { |
c4f35dd8 | 275 | int tid; |
53e95fcf | 276 | |
9f0bdab8 DJ |
277 | tid = TIDGET (ptid); |
278 | if (tid == 0) | |
279 | tid = PIDGET (ptid); | |
53e95fcf | 280 | |
c4f35dd8 | 281 | errno = 0; |
9f0bdab8 DJ |
282 | ptrace (PTRACE_POKEUSER, tid, |
283 | offsetof (struct user, u_debugreg[regnum]), value); | |
c4f35dd8 | 284 | if (errno != 0) |
edefbb7c | 285 | perror_with_name (_("Couldn't write debug register")); |
c4f35dd8 | 286 | } |
53e95fcf | 287 | |
c4f35dd8 | 288 | void |
430eaf2e | 289 | amd64_linux_dr_set_control (unsigned long control) |
c4f35dd8 | 290 | { |
9f0bdab8 DJ |
291 | struct lwp_info *lp; |
292 | ptid_t ptid; | |
293 | ||
294 | amd64_linux_dr[DR_CONTROL] = control; | |
295 | ALL_LWPS (lp, ptid) | |
296 | amd64_linux_dr_set (ptid, DR_CONTROL, control); | |
c4f35dd8 | 297 | } |
53e95fcf | 298 | |
c4f35dd8 | 299 | void |
430eaf2e | 300 | amd64_linux_dr_set_addr (int regnum, CORE_ADDR addr) |
b7c4cbf8 | 301 | { |
9f0bdab8 DJ |
302 | struct lwp_info *lp; |
303 | ptid_t ptid; | |
304 | ||
c4f35dd8 MK |
305 | gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); |
306 | ||
9f0bdab8 DJ |
307 | amd64_linux_dr[DR_FIRSTADDR + regnum] = addr; |
308 | ALL_LWPS (lp, ptid) | |
309 | amd64_linux_dr_set (ptid, DR_FIRSTADDR + regnum, addr); | |
b7c4cbf8 AJ |
310 | } |
311 | ||
53e95fcf | 312 | void |
430eaf2e | 313 | amd64_linux_dr_reset_addr (int regnum) |
53e95fcf | 314 | { |
9f0bdab8 | 315 | amd64_linux_dr_set_addr (regnum, 0); |
53e95fcf | 316 | } |
8cfda98c | 317 | |
c4f35dd8 | 318 | unsigned long |
430eaf2e | 319 | amd64_linux_dr_get_status (void) |
8cfda98c | 320 | { |
9f0bdab8 DJ |
321 | return amd64_linux_dr_get (inferior_ptid, DR_STATUS); |
322 | } | |
323 | ||
324 | static void | |
325 | amd64_linux_new_thread (ptid_t ptid) | |
326 | { | |
327 | int i; | |
328 | ||
329 | for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) | |
330 | amd64_linux_dr_set (ptid, i, amd64_linux_dr[i]); | |
331 | ||
332 | amd64_linux_dr_set (ptid, DR_CONTROL, amd64_linux_dr[DR_CONTROL]); | |
8cfda98c | 333 | } |
5bca7895 | 334 | \f |
c43af07c | 335 | |
50d71875 AC |
336 | /* This function is called by libthread_db as part of its handling of |
337 | a request for a thread's local storage address. */ | |
338 | ||
5bca7895 | 339 | ps_err_e |
c43af07c EZ |
340 | ps_get_thread_area (const struct ps_prochandle *ph, |
341 | lwpid_t lwpid, int idx, void **base) | |
342 | { | |
50d71875 AC |
343 | if (gdbarch_ptr_bit (current_gdbarch) == 32) |
344 | { | |
345 | /* The full structure is found in <asm-i386/ldt.h>. The second | |
346 | integer is the LDT's base_address and that is used to locate | |
347 | the thread's local storage. See i386-linux-nat.c more | |
348 | info. */ | |
349 | unsigned int desc[4]; | |
350 | ||
351 | /* This code assumes that "int" is 32 bits and that | |
352 | GET_THREAD_AREA returns no more than 4 int values. */ | |
353 | gdb_assert (sizeof (int) == 4); | |
354 | #ifndef PTRACE_GET_THREAD_AREA | |
355 | #define PTRACE_GET_THREAD_AREA 25 | |
356 | #endif | |
357 | if (ptrace (PTRACE_GET_THREAD_AREA, | |
358 | lwpid, (void *) (long) idx, (unsigned long) &desc) < 0) | |
359 | return PS_ERR; | |
360 | ||
361 | /* Extend the value to 64 bits. Here it's assumed that a "long" | |
362 | and a "void *" are the same. */ | |
363 | (*base) = (void *) (long) desc[1]; | |
364 | return PS_OK; | |
365 | } | |
366 | else | |
367 | { | |
368 | /* This definition comes from prctl.h, but some kernels may not | |
369 | have it. */ | |
c43af07c EZ |
370 | #ifndef PTRACE_ARCH_PRCTL |
371 | #define PTRACE_ARCH_PRCTL 30 | |
372 | #endif | |
50d71875 AC |
373 | /* FIXME: ezannoni-2003-07-09 see comment above about include |
374 | file order. We could be getting bogus values for these two. */ | |
375 | gdb_assert (FS < ELF_NGREG); | |
376 | gdb_assert (GS < ELF_NGREG); | |
377 | switch (idx) | |
378 | { | |
379 | case FS: | |
380 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
381 | return PS_OK; | |
382 | break; | |
383 | case GS: | |
384 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
385 | return PS_OK; | |
386 | break; | |
387 | default: /* Should not happen. */ | |
388 | return PS_BADADDR; | |
389 | } | |
c43af07c | 390 | } |
b6d42148 | 391 | return PS_ERR; /* ptrace failed. */ |
c43af07c | 392 | } |
5bca7895 | 393 | \f |
c43af07c | 394 | |
10d6c8cd DJ |
395 | static void (*super_post_startup_inferior) (ptid_t ptid); |
396 | ||
397 | static void | |
398 | amd64_linux_child_post_startup_inferior (ptid_t ptid) | |
4056d258 ML |
399 | { |
400 | i386_cleanup_dregs (); | |
10d6c8cd | 401 | super_post_startup_inferior (ptid); |
4056d258 | 402 | } |
60fac5b8 MK |
403 | \f |
404 | ||
5b009018 PA |
405 | /* When GDB is built as a 64-bit application on linux, the |
406 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since | |
407 | debugging a 32-bit inferior with a 64-bit GDB should look the same | |
408 | as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit | |
409 | conversion in-place ourselves. */ | |
410 | ||
411 | /* These types below (compat_*) define a siginfo type that is layout | |
412 | compatible with the siginfo type exported by the 32-bit userspace | |
413 | support. */ | |
414 | ||
415 | typedef int compat_int_t; | |
416 | typedef unsigned int compat_uptr_t; | |
417 | ||
418 | typedef int compat_time_t; | |
419 | typedef int compat_timer_t; | |
420 | typedef int compat_clock_t; | |
421 | ||
422 | struct compat_timeval | |
423 | { | |
424 | compat_time_t tv_sec; | |
425 | int tv_usec; | |
426 | }; | |
427 | ||
428 | typedef union compat_sigval | |
429 | { | |
430 | compat_int_t sival_int; | |
431 | compat_uptr_t sival_ptr; | |
432 | } compat_sigval_t; | |
433 | ||
434 | typedef struct compat_siginfo | |
435 | { | |
436 | int si_signo; | |
437 | int si_errno; | |
438 | int si_code; | |
439 | ||
440 | union | |
441 | { | |
442 | int _pad[((128 / sizeof (int)) - 3)]; | |
443 | ||
444 | /* kill() */ | |
445 | struct | |
446 | { | |
447 | unsigned int _pid; | |
448 | unsigned int _uid; | |
449 | } _kill; | |
450 | ||
451 | /* POSIX.1b timers */ | |
452 | struct | |
453 | { | |
454 | compat_timer_t _tid; | |
455 | int _overrun; | |
456 | compat_sigval_t _sigval; | |
457 | } _timer; | |
458 | ||
459 | /* POSIX.1b signals */ | |
460 | struct | |
461 | { | |
462 | unsigned int _pid; | |
463 | unsigned int _uid; | |
464 | compat_sigval_t _sigval; | |
465 | } _rt; | |
466 | ||
467 | /* SIGCHLD */ | |
468 | struct | |
469 | { | |
470 | unsigned int _pid; | |
471 | unsigned int _uid; | |
472 | int _status; | |
473 | compat_clock_t _utime; | |
474 | compat_clock_t _stime; | |
475 | } _sigchld; | |
476 | ||
477 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ | |
478 | struct | |
479 | { | |
480 | unsigned int _addr; | |
481 | } _sigfault; | |
482 | ||
483 | /* SIGPOLL */ | |
484 | struct | |
485 | { | |
486 | int _band; | |
487 | int _fd; | |
488 | } _sigpoll; | |
489 | } _sifields; | |
490 | } compat_siginfo_t; | |
491 | ||
492 | #define cpt_si_pid _sifields._kill._pid | |
493 | #define cpt_si_uid _sifields._kill._uid | |
494 | #define cpt_si_timerid _sifields._timer._tid | |
495 | #define cpt_si_overrun _sifields._timer._overrun | |
496 | #define cpt_si_status _sifields._sigchld._status | |
497 | #define cpt_si_utime _sifields._sigchld._utime | |
498 | #define cpt_si_stime _sifields._sigchld._stime | |
499 | #define cpt_si_ptr _sifields._rt._sigval.sival_ptr | |
500 | #define cpt_si_addr _sifields._sigfault._addr | |
501 | #define cpt_si_band _sifields._sigpoll._band | |
502 | #define cpt_si_fd _sifields._sigpoll._fd | |
503 | ||
14064aa2 DE |
504 | /* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun. |
505 | In their place is si_timer1,si_timer2. */ | |
506 | #ifndef si_timerid | |
507 | #define si_timerid si_timer1 | |
508 | #endif | |
509 | #ifndef si_overrun | |
510 | #define si_overrun si_timer2 | |
511 | #endif | |
512 | ||
5b009018 PA |
513 | static void |
514 | compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from) | |
515 | { | |
516 | memset (to, 0, sizeof (*to)); | |
517 | ||
518 | to->si_signo = from->si_signo; | |
519 | to->si_errno = from->si_errno; | |
520 | to->si_code = from->si_code; | |
521 | ||
522 | if (to->si_code < 0) | |
523 | { | |
524 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
525 | } | |
526 | else if (to->si_code == SI_USER) | |
527 | { | |
528 | to->cpt_si_pid = from->si_pid; | |
529 | to->cpt_si_uid = from->si_uid; | |
530 | } | |
531 | else if (to->si_code == SI_TIMER) | |
532 | { | |
533 | to->cpt_si_timerid = from->si_timerid; | |
534 | to->cpt_si_overrun = from->si_overrun; | |
535 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
536 | } | |
537 | else | |
538 | { | |
539 | switch (to->si_signo) | |
540 | { | |
541 | case SIGCHLD: | |
542 | to->cpt_si_pid = from->si_pid; | |
543 | to->cpt_si_uid = from->si_uid; | |
544 | to->cpt_si_status = from->si_status; | |
545 | to->cpt_si_utime = from->si_utime; | |
546 | to->cpt_si_stime = from->si_stime; | |
547 | break; | |
548 | case SIGILL: | |
549 | case SIGFPE: | |
550 | case SIGSEGV: | |
551 | case SIGBUS: | |
552 | to->cpt_si_addr = (intptr_t) from->si_addr; | |
553 | break; | |
554 | case SIGPOLL: | |
555 | to->cpt_si_band = from->si_band; | |
556 | to->cpt_si_fd = from->si_fd; | |
557 | break; | |
558 | default: | |
559 | to->cpt_si_pid = from->si_pid; | |
560 | to->cpt_si_uid = from->si_uid; | |
561 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
562 | break; | |
563 | } | |
564 | } | |
565 | } | |
566 | ||
567 | static void | |
568 | siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) | |
569 | { | |
570 | memset (to, 0, sizeof (*to)); | |
571 | ||
572 | to->si_signo = from->si_signo; | |
573 | to->si_errno = from->si_errno; | |
574 | to->si_code = from->si_code; | |
575 | ||
576 | if (to->si_code < 0) | |
577 | { | |
578 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
579 | } | |
580 | else if (to->si_code == SI_USER) | |
581 | { | |
582 | to->si_pid = from->cpt_si_pid; | |
583 | to->si_uid = from->cpt_si_uid; | |
584 | } | |
585 | else if (to->si_code == SI_TIMER) | |
586 | { | |
587 | to->si_timerid = from->cpt_si_timerid; | |
588 | to->si_overrun = from->cpt_si_overrun; | |
589 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
590 | } | |
591 | else | |
592 | { | |
593 | switch (to->si_signo) | |
594 | { | |
595 | case SIGCHLD: | |
596 | to->si_pid = from->cpt_si_pid; | |
597 | to->si_uid = from->cpt_si_uid; | |
598 | to->si_status = from->cpt_si_status; | |
599 | to->si_utime = from->cpt_si_utime; | |
600 | to->si_stime = from->cpt_si_stime; | |
601 | break; | |
602 | case SIGILL: | |
603 | case SIGFPE: | |
604 | case SIGSEGV: | |
605 | case SIGBUS: | |
606 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; | |
607 | break; | |
608 | case SIGPOLL: | |
609 | to->si_band = from->cpt_si_band; | |
610 | to->si_fd = from->cpt_si_fd; | |
611 | break; | |
612 | default: | |
613 | to->si_pid = from->cpt_si_pid; | |
614 | to->si_uid = from->cpt_si_uid; | |
615 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; | |
616 | break; | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | /* Convert a native/host siginfo object, into/from the siginfo in the | |
622 | layout of the inferiors' architecture. Returns true if any | |
623 | conversion was done; false otherwise. If DIRECTION is 1, then copy | |
624 | from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to | |
625 | INF. */ | |
626 | ||
627 | static int | |
628 | amd64_linux_siginfo_fixup (struct siginfo *native, gdb_byte *inf, int direction) | |
629 | { | |
630 | /* Is the inferior 32-bit? If so, then do fixup the siginfo | |
631 | object. */ | |
632 | if (gdbarch_addr_bit (get_frame_arch (get_current_frame ())) == 32) | |
633 | { | |
634 | gdb_assert (sizeof (struct siginfo) == sizeof (compat_siginfo_t)); | |
635 | ||
636 | if (direction == 0) | |
637 | compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, native); | |
638 | else | |
639 | siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf); | |
640 | ||
641 | return 1; | |
642 | } | |
643 | else | |
644 | return 0; | |
645 | } | |
646 | ||
60fac5b8 | 647 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
430eaf2e | 648 | void _initialize_amd64_linux_nat (void); |
60fac5b8 MK |
649 | |
650 | void | |
430eaf2e | 651 | _initialize_amd64_linux_nat (void) |
60fac5b8 | 652 | { |
10d6c8cd DJ |
653 | struct target_ops *t; |
654 | ||
430eaf2e | 655 | amd64_native_gregset32_reg_offset = amd64_linux_gregset32_reg_offset; |
60fac5b8 | 656 | amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS; |
430eaf2e | 657 | amd64_native_gregset64_reg_offset = amd64_linux_gregset64_reg_offset; |
8695c747 | 658 | amd64_native_gregset64_num_regs = AMD64_LINUX_NUM_REGS; |
60fac5b8 | 659 | |
430eaf2e | 660 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset) |
60fac5b8 | 661 | == amd64_native_gregset32_num_regs); |
430eaf2e | 662 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset64_reg_offset) |
60fac5b8 | 663 | == amd64_native_gregset64_num_regs); |
10d6c8cd DJ |
664 | |
665 | /* Fill in the generic GNU/Linux methods. */ | |
666 | t = linux_target (); | |
667 | ||
c03374d5 DJ |
668 | i386_use_watchpoints (t); |
669 | ||
10d6c8cd DJ |
670 | /* Override the GNU/Linux inferior startup hook. */ |
671 | super_post_startup_inferior = t->to_post_startup_inferior; | |
672 | t->to_post_startup_inferior = amd64_linux_child_post_startup_inferior; | |
673 | ||
674 | /* Add our register access methods. */ | |
675 | t->to_fetch_registers = amd64_linux_fetch_inferior_registers; | |
676 | t->to_store_registers = amd64_linux_store_inferior_registers; | |
677 | ||
678 | /* Register the target. */ | |
f973ed9c | 679 | linux_nat_add_target (t); |
9f0bdab8 | 680 | linux_nat_set_new_thread (t, amd64_linux_new_thread); |
5b009018 | 681 | linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup); |
60fac5b8 | 682 | } |