Commit | Line | Data |
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a4b6fc86 | 1 | /* Native-dependent code for GNU/Linux x86-64. |
0a65a603 | 2 | |
4c38e0a4 | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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" | |
9bb9e8ad | 53 | #include "i386-nat.h" |
60fac5b8 MK |
54 | |
55 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 | |
56 | `struct user' format and GDB's register cache layout. */ | |
57 | ||
430eaf2e | 58 | static int amd64_linux_gregset64_reg_offset[] = |
60fac5b8 MK |
59 | { |
60 | RAX * 8, RBX * 8, /* %rax, %rbx */ | |
61 | RCX * 8, RDX * 8, /* %rcx, %rdx */ | |
62 | RSI * 8, RDI * 8, /* %rsi, %rdi */ | |
63 | RBP * 8, RSP * 8, /* %rbp, %rsp */ | |
64 | R8 * 8, R9 * 8, /* %r8 ... */ | |
65 | R10 * 8, R11 * 8, | |
66 | R12 * 8, R13 * 8, | |
67 | R14 * 8, R15 * 8, /* ... %r15 */ | |
68 | RIP * 8, EFLAGS * 8, /* %rip, %eflags */ | |
af233647 | 69 | CS * 8, SS * 8, /* %cs, %ss */ |
60fac5b8 | 70 | DS * 8, ES * 8, /* %ds, %es */ |
8695c747 DJ |
71 | FS * 8, GS * 8, /* %fs, %gs */ |
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, | |
75 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
76 | ORIG_RAX * 8 | |
60fac5b8 MK |
77 | }; |
78 | \f | |
79 | ||
80 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 | |
81 | `struct user' format and GDB's register cache layout for GNU/Linux | |
82 | i386. | |
83 | ||
84 | Note that most GNU/Linux x86-64 registers are 64-bit, while the | |
85 | GNU/Linux i386 registers are all 32-bit, but since we're | |
86 | little-endian we get away with that. */ | |
87 | ||
88 | /* From <sys/reg.h> on GNU/Linux i386. */ | |
430eaf2e | 89 | static int amd64_linux_gregset32_reg_offset[] = |
60fac5b8 | 90 | { |
f5859b4d MK |
91 | RAX * 8, RCX * 8, /* %eax, %ecx */ |
92 | RDX * 8, RBX * 8, /* %edx, %ebx */ | |
93 | RSP * 8, RBP * 8, /* %esp, %ebp */ | |
94 | RSI * 8, RDI * 8, /* %esi, %edi */ | |
95 | RIP * 8, EFLAGS * 8, /* %eip, %eflags */ | |
96 | CS * 8, SS * 8, /* %cs, %ss */ | |
97 | DS * 8, ES * 8, /* %ds, %es */ | |
98 | FS * 8, GS * 8, /* %fs, %gs */ | |
60fac5b8 MK |
99 | -1, -1, -1, -1, -1, -1, -1, -1, |
100 | -1, -1, -1, -1, -1, -1, -1, -1, | |
101 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
f5859b4d | 102 | ORIG_RAX * 8 /* "orig_eax" */ |
60fac5b8 | 103 | }; |
53e95fcf JS |
104 | \f |
105 | ||
106 | /* Transfering the general-purpose registers between GDB, inferiors | |
107 | and core files. */ | |
108 | ||
60fac5b8 | 109 | /* Fill GDB's register cache with the general-purpose register values |
53e95fcf JS |
110 | in *GREGSETP. */ |
111 | ||
112 | void | |
7f7fe91e | 113 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
53e95fcf | 114 | { |
7f7fe91e | 115 | amd64_supply_native_gregset (regcache, gregsetp, -1); |
53e95fcf JS |
116 | } |
117 | ||
60fac5b8 MK |
118 | /* Fill register REGNUM (if it is a general-purpose register) in |
119 | *GREGSETP with the value in GDB's register cache. If REGNUM is -1, | |
53e95fcf JS |
120 | do this for all registers. */ |
121 | ||
122 | void | |
7f7fe91e UW |
123 | fill_gregset (const struct regcache *regcache, |
124 | elf_gregset_t *gregsetp, int regnum) | |
53e95fcf | 125 | { |
7f7fe91e | 126 | amd64_collect_native_gregset (regcache, gregsetp, regnum); |
53e95fcf JS |
127 | } |
128 | ||
53e95fcf JS |
129 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
130 | ||
60fac5b8 | 131 | /* Fill GDB's register cache with the floating-point and SSE register |
c4f35dd8 | 132 | values in *FPREGSETP. */ |
53e95fcf JS |
133 | |
134 | void | |
7f7fe91e | 135 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
53e95fcf | 136 | { |
7f7fe91e | 137 | amd64_supply_fxsave (regcache, -1, fpregsetp); |
53e95fcf JS |
138 | } |
139 | ||
8dda9770 | 140 | /* Fill register REGNUM (if it is a floating-point or SSE register) in |
60fac5b8 | 141 | *FPREGSETP with the value in GDB's register cache. If REGNUM is |
c4f35dd8 | 142 | -1, do this for all registers. */ |
53e95fcf JS |
143 | |
144 | void | |
7f7fe91e UW |
145 | fill_fpregset (const struct regcache *regcache, |
146 | elf_fpregset_t *fpregsetp, int regnum) | |
53e95fcf | 147 | { |
7f7fe91e | 148 | amd64_collect_fxsave (regcache, regnum, fpregsetp); |
53e95fcf | 149 | } |
53e95fcf JS |
150 | \f |
151 | ||
152 | /* Transferring arbitrary registers between GDB and inferior. */ | |
153 | ||
60fac5b8 | 154 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
53e95fcf JS |
155 | this for all registers (including the floating point and SSE |
156 | registers). */ | |
157 | ||
10d6c8cd | 158 | static void |
28439f5e PA |
159 | amd64_linux_fetch_inferior_registers (struct target_ops *ops, |
160 | struct regcache *regcache, int regnum) | |
53e95fcf | 161 | { |
f8028488 | 162 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
163 | int tid; |
164 | ||
a4b6fc86 | 165 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
166 | tid = TIDGET (inferior_ptid); |
167 | if (tid == 0) | |
168 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 169 | |
f8028488 | 170 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 171 | { |
99679982 MK |
172 | elf_gregset_t regs; |
173 | ||
174 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 175 | perror_with_name (_("Couldn't get registers")); |
99679982 | 176 | |
56be3814 | 177 | amd64_supply_native_gregset (regcache, ®s, -1); |
60fac5b8 MK |
178 | if (regnum != -1) |
179 | return; | |
53e95fcf JS |
180 | } |
181 | ||
f8028488 | 182 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 183 | { |
99679982 | 184 | elf_fpregset_t fpregs; |
53e95fcf | 185 | |
99679982 | 186 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) |
edefbb7c | 187 | perror_with_name (_("Couldn't get floating point status")); |
99679982 | 188 | |
56be3814 | 189 | amd64_supply_fxsave (regcache, -1, &fpregs); |
99679982 | 190 | } |
53e95fcf JS |
191 | } |
192 | ||
60fac5b8 MK |
193 | /* Store register REGNUM back into the child process. If REGNUM is |
194 | -1, do this for all registers (including the floating-point and SSE | |
53e95fcf | 195 | registers). */ |
c4f35dd8 | 196 | |
10d6c8cd | 197 | static void |
28439f5e PA |
198 | amd64_linux_store_inferior_registers (struct target_ops *ops, |
199 | struct regcache *regcache, int regnum) | |
53e95fcf | 200 | { |
f8028488 | 201 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
202 | int tid; |
203 | ||
a4b6fc86 | 204 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
205 | tid = TIDGET (inferior_ptid); |
206 | if (tid == 0) | |
207 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 208 | |
f8028488 | 209 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 210 | { |
99679982 MK |
211 | elf_gregset_t regs; |
212 | ||
213 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 214 | perror_with_name (_("Couldn't get registers")); |
99679982 | 215 | |
56be3814 | 216 | amd64_collect_native_gregset (regcache, ®s, regnum); |
99679982 MK |
217 | |
218 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 219 | perror_with_name (_("Couldn't write registers")); |
99679982 | 220 | |
60fac5b8 MK |
221 | if (regnum != -1) |
222 | return; | |
53e95fcf JS |
223 | } |
224 | ||
f8028488 | 225 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 226 | { |
99679982 MK |
227 | elf_fpregset_t fpregs; |
228 | ||
229 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) | |
edefbb7c | 230 | perror_with_name (_("Couldn't get floating point status")); |
99679982 | 231 | |
56be3814 | 232 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
99679982 MK |
233 | |
234 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0) | |
edefbb7c | 235 | perror_with_name (_("Couldn't write floating point status")); |
99679982 | 236 | |
53e95fcf JS |
237 | return; |
238 | } | |
53e95fcf JS |
239 | } |
240 | \f | |
9f0bdab8 DJ |
241 | /* Support for debug registers. */ |
242 | ||
243 | static unsigned long amd64_linux_dr[DR_CONTROL + 1]; | |
53e95fcf | 244 | |
c4f35dd8 | 245 | static unsigned long |
9f0bdab8 | 246 | amd64_linux_dr_get (ptid_t ptid, int regnum) |
c4f35dd8 MK |
247 | { |
248 | int tid; | |
249 | unsigned long value; | |
53e95fcf | 250 | |
9f0bdab8 DJ |
251 | tid = TIDGET (ptid); |
252 | if (tid == 0) | |
253 | tid = PIDGET (ptid); | |
53e95fcf | 254 | |
c4f35dd8 MK |
255 | /* FIXME: kettenis/2001-03-27: Calling perror_with_name if the |
256 | ptrace call fails breaks debugging remote targets. The correct | |
257 | way to fix this is to add the hardware breakpoint and watchpoint | |
9f0bdab8 | 258 | stuff to the target vector. For now, just return zero if the |
c4f35dd8 MK |
259 | ptrace call fails. */ |
260 | errno = 0; | |
9f0bdab8 | 261 | value = ptrace (PTRACE_PEEKUSER, tid, |
c4f35dd8 MK |
262 | offsetof (struct user, u_debugreg[regnum]), 0); |
263 | if (errno != 0) | |
264 | #if 0 | |
edefbb7c | 265 | perror_with_name (_("Couldn't read debug register")); |
c4f35dd8 MK |
266 | #else |
267 | return 0; | |
53e95fcf JS |
268 | #endif |
269 | ||
c4f35dd8 MK |
270 | return value; |
271 | } | |
53e95fcf | 272 | |
a79d3c27 JK |
273 | /* Set debug register REGNUM to VALUE in only the one LWP of PTID. */ |
274 | ||
53e95fcf | 275 | static void |
9f0bdab8 | 276 | amd64_linux_dr_set (ptid_t ptid, int regnum, unsigned long value) |
53e95fcf | 277 | { |
c4f35dd8 | 278 | int tid; |
53e95fcf | 279 | |
9f0bdab8 DJ |
280 | tid = TIDGET (ptid); |
281 | if (tid == 0) | |
282 | tid = PIDGET (ptid); | |
53e95fcf | 283 | |
c4f35dd8 | 284 | errno = 0; |
9f0bdab8 DJ |
285 | ptrace (PTRACE_POKEUSER, tid, |
286 | offsetof (struct user, u_debugreg[regnum]), value); | |
c4f35dd8 | 287 | if (errno != 0) |
edefbb7c | 288 | perror_with_name (_("Couldn't write debug register")); |
c4f35dd8 | 289 | } |
53e95fcf | 290 | |
a79d3c27 JK |
291 | /* Set DR_CONTROL to ADDR in all LWPs of LWP_LIST. */ |
292 | ||
9bb9e8ad | 293 | static void |
430eaf2e | 294 | amd64_linux_dr_set_control (unsigned long control) |
c4f35dd8 | 295 | { |
9f0bdab8 DJ |
296 | struct lwp_info *lp; |
297 | ptid_t ptid; | |
298 | ||
299 | amd64_linux_dr[DR_CONTROL] = control; | |
300 | ALL_LWPS (lp, ptid) | |
301 | amd64_linux_dr_set (ptid, DR_CONTROL, control); | |
c4f35dd8 | 302 | } |
53e95fcf | 303 | |
a79d3c27 JK |
304 | /* Set address REGNUM (zero based) to ADDR in all LWPs of LWP_LIST. */ |
305 | ||
9bb9e8ad | 306 | static void |
430eaf2e | 307 | amd64_linux_dr_set_addr (int regnum, CORE_ADDR addr) |
b7c4cbf8 | 308 | { |
9f0bdab8 DJ |
309 | struct lwp_info *lp; |
310 | ptid_t ptid; | |
311 | ||
c4f35dd8 MK |
312 | gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); |
313 | ||
9f0bdab8 DJ |
314 | amd64_linux_dr[DR_FIRSTADDR + regnum] = addr; |
315 | ALL_LWPS (lp, ptid) | |
316 | amd64_linux_dr_set (ptid, DR_FIRSTADDR + regnum, addr); | |
b7c4cbf8 AJ |
317 | } |
318 | ||
a79d3c27 JK |
319 | /* Set address REGNUM (zero based) to zero in all LWPs of LWP_LIST. */ |
320 | ||
9bb9e8ad | 321 | static void |
430eaf2e | 322 | amd64_linux_dr_reset_addr (int regnum) |
53e95fcf | 323 | { |
9f0bdab8 | 324 | amd64_linux_dr_set_addr (regnum, 0); |
53e95fcf | 325 | } |
8cfda98c | 326 | |
a79d3c27 JK |
327 | /* Get DR_STATUS from only the one LWP of INFERIOR_PTID. */ |
328 | ||
9bb9e8ad | 329 | static unsigned long |
430eaf2e | 330 | amd64_linux_dr_get_status (void) |
8cfda98c | 331 | { |
9f0bdab8 DJ |
332 | return amd64_linux_dr_get (inferior_ptid, DR_STATUS); |
333 | } | |
334 | ||
a79d3c27 JK |
335 | /* Unset MASK bits in DR_STATUS in all LWPs of LWP_LIST. */ |
336 | ||
337 | static void | |
338 | amd64_linux_dr_unset_status (unsigned long mask) | |
339 | { | |
340 | struct lwp_info *lp; | |
341 | ptid_t ptid; | |
342 | ||
343 | ALL_LWPS (lp, ptid) | |
344 | { | |
345 | unsigned long value; | |
346 | ||
347 | value = amd64_linux_dr_get (ptid, DR_STATUS); | |
348 | value &= ~mask; | |
349 | amd64_linux_dr_set (ptid, DR_STATUS, value); | |
350 | } | |
351 | } | |
352 | ||
353 | ||
9f0bdab8 DJ |
354 | static void |
355 | amd64_linux_new_thread (ptid_t ptid) | |
356 | { | |
357 | int i; | |
358 | ||
359 | for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) | |
360 | amd64_linux_dr_set (ptid, i, amd64_linux_dr[i]); | |
361 | ||
362 | amd64_linux_dr_set (ptid, DR_CONTROL, amd64_linux_dr[DR_CONTROL]); | |
8cfda98c | 363 | } |
5bca7895 | 364 | \f |
c43af07c | 365 | |
50d71875 AC |
366 | /* This function is called by libthread_db as part of its handling of |
367 | a request for a thread's local storage address. */ | |
368 | ||
5bca7895 | 369 | ps_err_e |
c43af07c EZ |
370 | ps_get_thread_area (const struct ps_prochandle *ph, |
371 | lwpid_t lwpid, int idx, void **base) | |
372 | { | |
a97b0ac8 | 373 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
50d71875 AC |
374 | { |
375 | /* The full structure is found in <asm-i386/ldt.h>. The second | |
376 | integer is the LDT's base_address and that is used to locate | |
377 | the thread's local storage. See i386-linux-nat.c more | |
378 | info. */ | |
379 | unsigned int desc[4]; | |
380 | ||
381 | /* This code assumes that "int" is 32 bits and that | |
382 | GET_THREAD_AREA returns no more than 4 int values. */ | |
383 | gdb_assert (sizeof (int) == 4); | |
384 | #ifndef PTRACE_GET_THREAD_AREA | |
385 | #define PTRACE_GET_THREAD_AREA 25 | |
386 | #endif | |
387 | if (ptrace (PTRACE_GET_THREAD_AREA, | |
388 | lwpid, (void *) (long) idx, (unsigned long) &desc) < 0) | |
389 | return PS_ERR; | |
390 | ||
391 | /* Extend the value to 64 bits. Here it's assumed that a "long" | |
392 | and a "void *" are the same. */ | |
393 | (*base) = (void *) (long) desc[1]; | |
394 | return PS_OK; | |
395 | } | |
396 | else | |
397 | { | |
398 | /* This definition comes from prctl.h, but some kernels may not | |
399 | have it. */ | |
c43af07c EZ |
400 | #ifndef PTRACE_ARCH_PRCTL |
401 | #define PTRACE_ARCH_PRCTL 30 | |
402 | #endif | |
50d71875 AC |
403 | /* FIXME: ezannoni-2003-07-09 see comment above about include |
404 | file order. We could be getting bogus values for these two. */ | |
405 | gdb_assert (FS < ELF_NGREG); | |
406 | gdb_assert (GS < ELF_NGREG); | |
407 | switch (idx) | |
408 | { | |
409 | case FS: | |
410 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
411 | return PS_OK; | |
412 | break; | |
413 | case GS: | |
414 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
415 | return PS_OK; | |
416 | break; | |
417 | default: /* Should not happen. */ | |
418 | return PS_BADADDR; | |
419 | } | |
c43af07c | 420 | } |
b6d42148 | 421 | return PS_ERR; /* ptrace failed. */ |
c43af07c | 422 | } |
5bca7895 | 423 | \f |
c43af07c | 424 | |
10d6c8cd DJ |
425 | static void (*super_post_startup_inferior) (ptid_t ptid); |
426 | ||
427 | static void | |
428 | amd64_linux_child_post_startup_inferior (ptid_t ptid) | |
4056d258 ML |
429 | { |
430 | i386_cleanup_dregs (); | |
10d6c8cd | 431 | super_post_startup_inferior (ptid); |
4056d258 | 432 | } |
60fac5b8 MK |
433 | \f |
434 | ||
5b009018 PA |
435 | /* When GDB is built as a 64-bit application on linux, the |
436 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since | |
437 | debugging a 32-bit inferior with a 64-bit GDB should look the same | |
438 | as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit | |
439 | conversion in-place ourselves. */ | |
440 | ||
441 | /* These types below (compat_*) define a siginfo type that is layout | |
442 | compatible with the siginfo type exported by the 32-bit userspace | |
443 | support. */ | |
444 | ||
445 | typedef int compat_int_t; | |
446 | typedef unsigned int compat_uptr_t; | |
447 | ||
448 | typedef int compat_time_t; | |
449 | typedef int compat_timer_t; | |
450 | typedef int compat_clock_t; | |
451 | ||
452 | struct compat_timeval | |
453 | { | |
454 | compat_time_t tv_sec; | |
455 | int tv_usec; | |
456 | }; | |
457 | ||
458 | typedef union compat_sigval | |
459 | { | |
460 | compat_int_t sival_int; | |
461 | compat_uptr_t sival_ptr; | |
462 | } compat_sigval_t; | |
463 | ||
464 | typedef struct compat_siginfo | |
465 | { | |
466 | int si_signo; | |
467 | int si_errno; | |
468 | int si_code; | |
469 | ||
470 | union | |
471 | { | |
472 | int _pad[((128 / sizeof (int)) - 3)]; | |
473 | ||
474 | /* kill() */ | |
475 | struct | |
476 | { | |
477 | unsigned int _pid; | |
478 | unsigned int _uid; | |
479 | } _kill; | |
480 | ||
481 | /* POSIX.1b timers */ | |
482 | struct | |
483 | { | |
484 | compat_timer_t _tid; | |
485 | int _overrun; | |
486 | compat_sigval_t _sigval; | |
487 | } _timer; | |
488 | ||
489 | /* POSIX.1b signals */ | |
490 | struct | |
491 | { | |
492 | unsigned int _pid; | |
493 | unsigned int _uid; | |
494 | compat_sigval_t _sigval; | |
495 | } _rt; | |
496 | ||
497 | /* SIGCHLD */ | |
498 | struct | |
499 | { | |
500 | unsigned int _pid; | |
501 | unsigned int _uid; | |
502 | int _status; | |
503 | compat_clock_t _utime; | |
504 | compat_clock_t _stime; | |
505 | } _sigchld; | |
506 | ||
507 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ | |
508 | struct | |
509 | { | |
510 | unsigned int _addr; | |
511 | } _sigfault; | |
512 | ||
513 | /* SIGPOLL */ | |
514 | struct | |
515 | { | |
516 | int _band; | |
517 | int _fd; | |
518 | } _sigpoll; | |
519 | } _sifields; | |
520 | } compat_siginfo_t; | |
521 | ||
522 | #define cpt_si_pid _sifields._kill._pid | |
523 | #define cpt_si_uid _sifields._kill._uid | |
524 | #define cpt_si_timerid _sifields._timer._tid | |
525 | #define cpt_si_overrun _sifields._timer._overrun | |
526 | #define cpt_si_status _sifields._sigchld._status | |
527 | #define cpt_si_utime _sifields._sigchld._utime | |
528 | #define cpt_si_stime _sifields._sigchld._stime | |
529 | #define cpt_si_ptr _sifields._rt._sigval.sival_ptr | |
530 | #define cpt_si_addr _sifields._sigfault._addr | |
531 | #define cpt_si_band _sifields._sigpoll._band | |
532 | #define cpt_si_fd _sifields._sigpoll._fd | |
533 | ||
14064aa2 DE |
534 | /* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun. |
535 | In their place is si_timer1,si_timer2. */ | |
536 | #ifndef si_timerid | |
537 | #define si_timerid si_timer1 | |
538 | #endif | |
539 | #ifndef si_overrun | |
540 | #define si_overrun si_timer2 | |
541 | #endif | |
542 | ||
5b009018 PA |
543 | static void |
544 | compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from) | |
545 | { | |
546 | memset (to, 0, sizeof (*to)); | |
547 | ||
548 | to->si_signo = from->si_signo; | |
549 | to->si_errno = from->si_errno; | |
550 | to->si_code = from->si_code; | |
551 | ||
552 | if (to->si_code < 0) | |
553 | { | |
554 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
555 | } | |
556 | else if (to->si_code == SI_USER) | |
557 | { | |
558 | to->cpt_si_pid = from->si_pid; | |
559 | to->cpt_si_uid = from->si_uid; | |
560 | } | |
561 | else if (to->si_code == SI_TIMER) | |
562 | { | |
563 | to->cpt_si_timerid = from->si_timerid; | |
564 | to->cpt_si_overrun = from->si_overrun; | |
565 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
566 | } | |
567 | else | |
568 | { | |
569 | switch (to->si_signo) | |
570 | { | |
571 | case SIGCHLD: | |
572 | to->cpt_si_pid = from->si_pid; | |
573 | to->cpt_si_uid = from->si_uid; | |
574 | to->cpt_si_status = from->si_status; | |
575 | to->cpt_si_utime = from->si_utime; | |
576 | to->cpt_si_stime = from->si_stime; | |
577 | break; | |
578 | case SIGILL: | |
579 | case SIGFPE: | |
580 | case SIGSEGV: | |
581 | case SIGBUS: | |
582 | to->cpt_si_addr = (intptr_t) from->si_addr; | |
583 | break; | |
584 | case SIGPOLL: | |
585 | to->cpt_si_band = from->si_band; | |
586 | to->cpt_si_fd = from->si_fd; | |
587 | break; | |
588 | default: | |
589 | to->cpt_si_pid = from->si_pid; | |
590 | to->cpt_si_uid = from->si_uid; | |
591 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
592 | break; | |
593 | } | |
594 | } | |
595 | } | |
596 | ||
597 | static void | |
598 | siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) | |
599 | { | |
600 | memset (to, 0, sizeof (*to)); | |
601 | ||
602 | to->si_signo = from->si_signo; | |
603 | to->si_errno = from->si_errno; | |
604 | to->si_code = from->si_code; | |
605 | ||
606 | if (to->si_code < 0) | |
607 | { | |
608 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
609 | } | |
610 | else if (to->si_code == SI_USER) | |
611 | { | |
612 | to->si_pid = from->cpt_si_pid; | |
613 | to->si_uid = from->cpt_si_uid; | |
614 | } | |
615 | else if (to->si_code == SI_TIMER) | |
616 | { | |
617 | to->si_timerid = from->cpt_si_timerid; | |
618 | to->si_overrun = from->cpt_si_overrun; | |
619 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
620 | } | |
621 | else | |
622 | { | |
623 | switch (to->si_signo) | |
624 | { | |
625 | case SIGCHLD: | |
626 | to->si_pid = from->cpt_si_pid; | |
627 | to->si_uid = from->cpt_si_uid; | |
628 | to->si_status = from->cpt_si_status; | |
629 | to->si_utime = from->cpt_si_utime; | |
630 | to->si_stime = from->cpt_si_stime; | |
631 | break; | |
632 | case SIGILL: | |
633 | case SIGFPE: | |
634 | case SIGSEGV: | |
635 | case SIGBUS: | |
636 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; | |
637 | break; | |
638 | case SIGPOLL: | |
639 | to->si_band = from->cpt_si_band; | |
640 | to->si_fd = from->cpt_si_fd; | |
641 | break; | |
642 | default: | |
643 | to->si_pid = from->cpt_si_pid; | |
644 | to->si_uid = from->cpt_si_uid; | |
645 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; | |
646 | break; | |
647 | } | |
648 | } | |
649 | } | |
650 | ||
651 | /* Convert a native/host siginfo object, into/from the siginfo in the | |
652 | layout of the inferiors' architecture. Returns true if any | |
653 | conversion was done; false otherwise. If DIRECTION is 1, then copy | |
654 | from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to | |
655 | INF. */ | |
656 | ||
657 | static int | |
658 | amd64_linux_siginfo_fixup (struct siginfo *native, gdb_byte *inf, int direction) | |
659 | { | |
660 | /* Is the inferior 32-bit? If so, then do fixup the siginfo | |
661 | object. */ | |
662 | if (gdbarch_addr_bit (get_frame_arch (get_current_frame ())) == 32) | |
663 | { | |
664 | gdb_assert (sizeof (struct siginfo) == sizeof (compat_siginfo_t)); | |
665 | ||
666 | if (direction == 0) | |
667 | compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, native); | |
668 | else | |
669 | siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf); | |
670 | ||
671 | return 1; | |
672 | } | |
673 | else | |
674 | return 0; | |
675 | } | |
676 | ||
90884b2b L |
677 | /* Get Linux/x86 target description from running target. |
678 | ||
679 | Value of CS segment register: | |
680 | 1. 64bit process: 0x33. | |
681 | 2. 32bit process: 0x23. | |
682 | */ | |
683 | ||
684 | #define AMD64_LINUX_USER64_CS 0x33 | |
685 | ||
686 | static const struct target_desc * | |
687 | amd64_linux_read_description (struct target_ops *ops) | |
688 | { | |
689 | unsigned long cs; | |
690 | int tid; | |
691 | ||
692 | /* GNU/Linux LWP ID's are process ID's. */ | |
693 | tid = TIDGET (inferior_ptid); | |
694 | if (tid == 0) | |
695 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
696 | ||
697 | /* Get CS register. */ | |
698 | errno = 0; | |
699 | cs = ptrace (PTRACE_PEEKUSER, tid, | |
700 | offsetof (struct user_regs_struct, cs), 0); | |
701 | if (errno != 0) | |
702 | perror_with_name (_("Couldn't get CS register")); | |
703 | ||
704 | if (cs == AMD64_LINUX_USER64_CS) | |
705 | return tdesc_amd64_linux; | |
706 | else | |
707 | return tdesc_i386_linux; | |
708 | } | |
709 | ||
60fac5b8 | 710 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
430eaf2e | 711 | void _initialize_amd64_linux_nat (void); |
60fac5b8 MK |
712 | |
713 | void | |
430eaf2e | 714 | _initialize_amd64_linux_nat (void) |
60fac5b8 | 715 | { |
10d6c8cd DJ |
716 | struct target_ops *t; |
717 | ||
430eaf2e | 718 | amd64_native_gregset32_reg_offset = amd64_linux_gregset32_reg_offset; |
60fac5b8 | 719 | amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS; |
430eaf2e | 720 | amd64_native_gregset64_reg_offset = amd64_linux_gregset64_reg_offset; |
8695c747 | 721 | amd64_native_gregset64_num_regs = AMD64_LINUX_NUM_REGS; |
60fac5b8 | 722 | |
430eaf2e | 723 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset) |
60fac5b8 | 724 | == amd64_native_gregset32_num_regs); |
430eaf2e | 725 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset64_reg_offset) |
60fac5b8 | 726 | == amd64_native_gregset64_num_regs); |
10d6c8cd DJ |
727 | |
728 | /* Fill in the generic GNU/Linux methods. */ | |
729 | t = linux_target (); | |
730 | ||
c03374d5 DJ |
731 | i386_use_watchpoints (t); |
732 | ||
9bb9e8ad PM |
733 | i386_dr_low.set_control = amd64_linux_dr_set_control; |
734 | i386_dr_low.set_addr = amd64_linux_dr_set_addr; | |
735 | i386_dr_low.reset_addr = amd64_linux_dr_reset_addr; | |
736 | i386_dr_low.get_status = amd64_linux_dr_get_status; | |
a79d3c27 | 737 | i386_dr_low.unset_status = amd64_linux_dr_unset_status; |
9bb9e8ad PM |
738 | i386_set_debug_register_length (8); |
739 | ||
10d6c8cd DJ |
740 | /* Override the GNU/Linux inferior startup hook. */ |
741 | super_post_startup_inferior = t->to_post_startup_inferior; | |
742 | t->to_post_startup_inferior = amd64_linux_child_post_startup_inferior; | |
743 | ||
744 | /* Add our register access methods. */ | |
745 | t->to_fetch_registers = amd64_linux_fetch_inferior_registers; | |
746 | t->to_store_registers = amd64_linux_store_inferior_registers; | |
747 | ||
90884b2b L |
748 | t->to_read_description = amd64_linux_read_description; |
749 | ||
10d6c8cd | 750 | /* Register the target. */ |
f973ed9c | 751 | linux_nat_add_target (t); |
9f0bdab8 | 752 | linux_nat_set_new_thread (t, amd64_linux_new_thread); |
5b009018 | 753 | linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup); |
60fac5b8 | 754 | } |