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" | |
a055a187 | 26 | #include "regset.h" |
4056d258 | 27 | #include "linux-nat.h" |
8695c747 | 28 | #include "amd64-linux-tdep.h" |
c4f35dd8 | 29 | |
53e95fcf | 30 | #include "gdb_assert.h" |
30d52491 | 31 | #include "gdb_string.h" |
a055a187 L |
32 | #include "elf/common.h" |
33 | #include <sys/uio.h> | |
53e95fcf JS |
34 | #include <sys/ptrace.h> |
35 | #include <sys/debugreg.h> | |
36 | #include <sys/syscall.h> | |
37 | #include <sys/procfs.h> | |
c43af07c EZ |
38 | #include <asm/prctl.h> |
39 | /* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after | |
40 | <asm/ptrace.h> because the latter redefines FS and GS for no apparent | |
41 | reason, and those definitions don't match the ones that libpthread_db | |
42 | uses, which come from <sys/reg.h>. */ | |
43 | /* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have | |
44 | been removed from ptrace.h in the kernel. However, better safe than | |
45 | sorry. */ | |
46 | #include <asm/ptrace.h> | |
33a0a2ac | 47 | #include <sys/reg.h> |
c43af07c | 48 | #include "gdb_proc_service.h" |
33a0a2ac | 49 | |
c4f35dd8 MK |
50 | /* Prototypes for supply_gregset etc. */ |
51 | #include "gregset.h" | |
52 | ||
9c1488cb | 53 | #include "amd64-tdep.h" |
60fac5b8 MK |
54 | #include "i386-linux-tdep.h" |
55 | #include "amd64-nat.h" | |
9bb9e8ad | 56 | #include "i386-nat.h" |
a055a187 L |
57 | #include "i386-xstate.h" |
58 | ||
59 | #ifndef PTRACE_GETREGSET | |
60 | #define PTRACE_GETREGSET 0x4204 | |
61 | #endif | |
62 | ||
63 | #ifndef PTRACE_SETREGSET | |
64 | #define PTRACE_SETREGSET 0x4205 | |
65 | #endif | |
66 | ||
67 | /* Does the current host support PTRACE_GETREGSET? */ | |
68 | static int have_ptrace_getregset = -1; | |
60fac5b8 MK |
69 | |
70 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 | |
71 | `struct user' format and GDB's register cache layout. */ | |
72 | ||
430eaf2e | 73 | static int amd64_linux_gregset64_reg_offset[] = |
60fac5b8 MK |
74 | { |
75 | RAX * 8, RBX * 8, /* %rax, %rbx */ | |
76 | RCX * 8, RDX * 8, /* %rcx, %rdx */ | |
77 | RSI * 8, RDI * 8, /* %rsi, %rdi */ | |
78 | RBP * 8, RSP * 8, /* %rbp, %rsp */ | |
79 | R8 * 8, R9 * 8, /* %r8 ... */ | |
80 | R10 * 8, R11 * 8, | |
81 | R12 * 8, R13 * 8, | |
82 | R14 * 8, R15 * 8, /* ... %r15 */ | |
83 | RIP * 8, EFLAGS * 8, /* %rip, %eflags */ | |
af233647 | 84 | CS * 8, SS * 8, /* %cs, %ss */ |
60fac5b8 | 85 | DS * 8, ES * 8, /* %ds, %es */ |
8695c747 DJ |
86 | FS * 8, GS * 8, /* %fs, %gs */ |
87 | -1, -1, -1, -1, -1, -1, -1, -1, | |
88 | -1, -1, -1, -1, -1, -1, -1, -1, | |
89 | -1, -1, -1, -1, -1, -1, -1, -1, | |
90 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
a055a187 L |
91 | -1, -1, -1, -1, -1, -1, -1, -1, |
92 | -1, -1, -1, -1, -1, -1, -1, -1, | |
8695c747 | 93 | ORIG_RAX * 8 |
60fac5b8 MK |
94 | }; |
95 | \f | |
96 | ||
97 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 | |
98 | `struct user' format and GDB's register cache layout for GNU/Linux | |
99 | i386. | |
100 | ||
101 | Note that most GNU/Linux x86-64 registers are 64-bit, while the | |
102 | GNU/Linux i386 registers are all 32-bit, but since we're | |
103 | little-endian we get away with that. */ | |
104 | ||
105 | /* From <sys/reg.h> on GNU/Linux i386. */ | |
430eaf2e | 106 | static int amd64_linux_gregset32_reg_offset[] = |
60fac5b8 | 107 | { |
f5859b4d MK |
108 | RAX * 8, RCX * 8, /* %eax, %ecx */ |
109 | RDX * 8, RBX * 8, /* %edx, %ebx */ | |
110 | RSP * 8, RBP * 8, /* %esp, %ebp */ | |
111 | RSI * 8, RDI * 8, /* %esi, %edi */ | |
112 | RIP * 8, EFLAGS * 8, /* %eip, %eflags */ | |
113 | CS * 8, SS * 8, /* %cs, %ss */ | |
114 | DS * 8, ES * 8, /* %ds, %es */ | |
115 | FS * 8, GS * 8, /* %fs, %gs */ | |
60fac5b8 MK |
116 | -1, -1, -1, -1, -1, -1, -1, -1, |
117 | -1, -1, -1, -1, -1, -1, -1, -1, | |
118 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
a055a187 | 119 | -1, -1, -1, -1, -1, -1, -1, -1, |
f5859b4d | 120 | ORIG_RAX * 8 /* "orig_eax" */ |
60fac5b8 | 121 | }; |
53e95fcf JS |
122 | \f |
123 | ||
124 | /* Transfering the general-purpose registers between GDB, inferiors | |
125 | and core files. */ | |
126 | ||
60fac5b8 | 127 | /* Fill GDB's register cache with the general-purpose register values |
53e95fcf JS |
128 | in *GREGSETP. */ |
129 | ||
130 | void | |
7f7fe91e | 131 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
53e95fcf | 132 | { |
7f7fe91e | 133 | amd64_supply_native_gregset (regcache, gregsetp, -1); |
53e95fcf JS |
134 | } |
135 | ||
60fac5b8 MK |
136 | /* Fill register REGNUM (if it is a general-purpose register) in |
137 | *GREGSETP with the value in GDB's register cache. If REGNUM is -1, | |
53e95fcf JS |
138 | do this for all registers. */ |
139 | ||
140 | void | |
7f7fe91e UW |
141 | fill_gregset (const struct regcache *regcache, |
142 | elf_gregset_t *gregsetp, int regnum) | |
53e95fcf | 143 | { |
7f7fe91e | 144 | amd64_collect_native_gregset (regcache, gregsetp, regnum); |
53e95fcf JS |
145 | } |
146 | ||
53e95fcf JS |
147 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
148 | ||
60fac5b8 | 149 | /* Fill GDB's register cache with the floating-point and SSE register |
c4f35dd8 | 150 | values in *FPREGSETP. */ |
53e95fcf JS |
151 | |
152 | void | |
7f7fe91e | 153 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
53e95fcf | 154 | { |
7f7fe91e | 155 | amd64_supply_fxsave (regcache, -1, fpregsetp); |
53e95fcf JS |
156 | } |
157 | ||
8dda9770 | 158 | /* Fill register REGNUM (if it is a floating-point or SSE register) in |
60fac5b8 | 159 | *FPREGSETP with the value in GDB's register cache. If REGNUM is |
c4f35dd8 | 160 | -1, do this for all registers. */ |
53e95fcf JS |
161 | |
162 | void | |
7f7fe91e UW |
163 | fill_fpregset (const struct regcache *regcache, |
164 | elf_fpregset_t *fpregsetp, int regnum) | |
53e95fcf | 165 | { |
7f7fe91e | 166 | amd64_collect_fxsave (regcache, regnum, fpregsetp); |
53e95fcf | 167 | } |
53e95fcf JS |
168 | \f |
169 | ||
170 | /* Transferring arbitrary registers between GDB and inferior. */ | |
171 | ||
60fac5b8 | 172 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
53e95fcf JS |
173 | this for all registers (including the floating point and SSE |
174 | registers). */ | |
175 | ||
10d6c8cd | 176 | static void |
28439f5e PA |
177 | amd64_linux_fetch_inferior_registers (struct target_ops *ops, |
178 | struct regcache *regcache, int regnum) | |
53e95fcf | 179 | { |
f8028488 | 180 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
181 | int tid; |
182 | ||
a4b6fc86 | 183 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
184 | tid = TIDGET (inferior_ptid); |
185 | if (tid == 0) | |
186 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 187 | |
f8028488 | 188 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 189 | { |
99679982 MK |
190 | elf_gregset_t regs; |
191 | ||
192 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 193 | perror_with_name (_("Couldn't get registers")); |
99679982 | 194 | |
56be3814 | 195 | amd64_supply_native_gregset (regcache, ®s, -1); |
60fac5b8 MK |
196 | if (regnum != -1) |
197 | return; | |
53e95fcf JS |
198 | } |
199 | ||
f8028488 | 200 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 201 | { |
99679982 | 202 | elf_fpregset_t fpregs; |
53e95fcf | 203 | |
a055a187 L |
204 | if (have_ptrace_getregset) |
205 | { | |
206 | char xstateregs[I386_XSTATE_MAX_SIZE]; | |
207 | struct iovec iov; | |
208 | ||
209 | iov.iov_base = xstateregs; | |
210 | iov.iov_len = sizeof (xstateregs); | |
211 | if (ptrace (PTRACE_GETREGSET, tid, | |
212 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
213 | perror_with_name (_("Couldn't get extended state status")); | |
99679982 | 214 | |
a055a187 L |
215 | amd64_supply_xsave (regcache, -1, xstateregs); |
216 | } | |
217 | else | |
218 | { | |
219 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) | |
220 | perror_with_name (_("Couldn't get floating point status")); | |
221 | ||
222 | amd64_supply_fxsave (regcache, -1, &fpregs); | |
223 | } | |
99679982 | 224 | } |
53e95fcf JS |
225 | } |
226 | ||
60fac5b8 MK |
227 | /* Store register REGNUM back into the child process. If REGNUM is |
228 | -1, do this for all registers (including the floating-point and SSE | |
53e95fcf | 229 | registers). */ |
c4f35dd8 | 230 | |
10d6c8cd | 231 | static void |
28439f5e PA |
232 | amd64_linux_store_inferior_registers (struct target_ops *ops, |
233 | struct regcache *regcache, int regnum) | |
53e95fcf | 234 | { |
f8028488 | 235 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
236 | int tid; |
237 | ||
a4b6fc86 | 238 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
239 | tid = TIDGET (inferior_ptid); |
240 | if (tid == 0) | |
241 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 242 | |
f8028488 | 243 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 244 | { |
99679982 MK |
245 | elf_gregset_t regs; |
246 | ||
247 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 248 | perror_with_name (_("Couldn't get registers")); |
99679982 | 249 | |
56be3814 | 250 | amd64_collect_native_gregset (regcache, ®s, regnum); |
99679982 MK |
251 | |
252 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 253 | perror_with_name (_("Couldn't write registers")); |
99679982 | 254 | |
60fac5b8 MK |
255 | if (regnum != -1) |
256 | return; | |
53e95fcf JS |
257 | } |
258 | ||
f8028488 | 259 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 260 | { |
99679982 MK |
261 | elf_fpregset_t fpregs; |
262 | ||
a055a187 L |
263 | if (have_ptrace_getregset) |
264 | { | |
265 | char xstateregs[I386_XSTATE_MAX_SIZE]; | |
266 | struct iovec iov; | |
267 | ||
268 | iov.iov_base = xstateregs; | |
269 | iov.iov_len = sizeof (xstateregs); | |
270 | if (ptrace (PTRACE_GETREGSET, tid, | |
271 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
272 | perror_with_name (_("Couldn't get extended state status")); | |
99679982 | 273 | |
a055a187 L |
274 | amd64_collect_xsave (regcache, regnum, xstateregs, 0); |
275 | ||
276 | if (ptrace (PTRACE_SETREGSET, tid, | |
277 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
278 | perror_with_name (_("Couldn't write extended state status")); | |
279 | } | |
280 | else | |
281 | { | |
282 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) | |
283 | perror_with_name (_("Couldn't get floating point status")); | |
99679982 | 284 | |
a055a187 | 285 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
99679982 | 286 | |
a055a187 L |
287 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0) |
288 | perror_with_name (_("Couldn't write floating point status")); | |
289 | } | |
53e95fcf | 290 | } |
53e95fcf JS |
291 | } |
292 | \f | |
9f0bdab8 DJ |
293 | /* Support for debug registers. */ |
294 | ||
295 | static unsigned long amd64_linux_dr[DR_CONTROL + 1]; | |
53e95fcf | 296 | |
c4f35dd8 | 297 | static unsigned long |
9f0bdab8 | 298 | amd64_linux_dr_get (ptid_t ptid, int regnum) |
c4f35dd8 MK |
299 | { |
300 | int tid; | |
301 | unsigned long value; | |
53e95fcf | 302 | |
9f0bdab8 DJ |
303 | tid = TIDGET (ptid); |
304 | if (tid == 0) | |
305 | tid = PIDGET (ptid); | |
53e95fcf | 306 | |
c4f35dd8 MK |
307 | /* FIXME: kettenis/2001-03-27: Calling perror_with_name if the |
308 | ptrace call fails breaks debugging remote targets. The correct | |
309 | way to fix this is to add the hardware breakpoint and watchpoint | |
9f0bdab8 | 310 | stuff to the target vector. For now, just return zero if the |
c4f35dd8 MK |
311 | ptrace call fails. */ |
312 | errno = 0; | |
9f0bdab8 | 313 | value = ptrace (PTRACE_PEEKUSER, tid, |
c4f35dd8 MK |
314 | offsetof (struct user, u_debugreg[regnum]), 0); |
315 | if (errno != 0) | |
316 | #if 0 | |
edefbb7c | 317 | perror_with_name (_("Couldn't read debug register")); |
c4f35dd8 MK |
318 | #else |
319 | return 0; | |
53e95fcf JS |
320 | #endif |
321 | ||
c4f35dd8 MK |
322 | return value; |
323 | } | |
53e95fcf | 324 | |
a79d3c27 JK |
325 | /* Set debug register REGNUM to VALUE in only the one LWP of PTID. */ |
326 | ||
53e95fcf | 327 | static void |
9f0bdab8 | 328 | amd64_linux_dr_set (ptid_t ptid, int regnum, unsigned long value) |
53e95fcf | 329 | { |
c4f35dd8 | 330 | int tid; |
53e95fcf | 331 | |
9f0bdab8 DJ |
332 | tid = TIDGET (ptid); |
333 | if (tid == 0) | |
334 | tid = PIDGET (ptid); | |
53e95fcf | 335 | |
c4f35dd8 | 336 | errno = 0; |
9f0bdab8 DJ |
337 | ptrace (PTRACE_POKEUSER, tid, |
338 | offsetof (struct user, u_debugreg[regnum]), value); | |
c4f35dd8 | 339 | if (errno != 0) |
edefbb7c | 340 | perror_with_name (_("Couldn't write debug register")); |
c4f35dd8 | 341 | } |
53e95fcf | 342 | |
a79d3c27 JK |
343 | /* Set DR_CONTROL to ADDR in all LWPs of LWP_LIST. */ |
344 | ||
9bb9e8ad | 345 | static void |
430eaf2e | 346 | amd64_linux_dr_set_control (unsigned long control) |
c4f35dd8 | 347 | { |
9f0bdab8 DJ |
348 | struct lwp_info *lp; |
349 | ptid_t ptid; | |
350 | ||
351 | amd64_linux_dr[DR_CONTROL] = control; | |
352 | ALL_LWPS (lp, ptid) | |
353 | amd64_linux_dr_set (ptid, DR_CONTROL, control); | |
c4f35dd8 | 354 | } |
53e95fcf | 355 | |
a79d3c27 JK |
356 | /* Set address REGNUM (zero based) to ADDR in all LWPs of LWP_LIST. */ |
357 | ||
9bb9e8ad | 358 | static void |
430eaf2e | 359 | amd64_linux_dr_set_addr (int regnum, CORE_ADDR addr) |
b7c4cbf8 | 360 | { |
9f0bdab8 DJ |
361 | struct lwp_info *lp; |
362 | ptid_t ptid; | |
363 | ||
c4f35dd8 MK |
364 | gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); |
365 | ||
9f0bdab8 DJ |
366 | amd64_linux_dr[DR_FIRSTADDR + regnum] = addr; |
367 | ALL_LWPS (lp, ptid) | |
368 | amd64_linux_dr_set (ptid, DR_FIRSTADDR + regnum, addr); | |
b7c4cbf8 AJ |
369 | } |
370 | ||
a79d3c27 JK |
371 | /* Set address REGNUM (zero based) to zero in all LWPs of LWP_LIST. */ |
372 | ||
9bb9e8ad | 373 | static void |
430eaf2e | 374 | amd64_linux_dr_reset_addr (int regnum) |
53e95fcf | 375 | { |
9f0bdab8 | 376 | amd64_linux_dr_set_addr (regnum, 0); |
53e95fcf | 377 | } |
8cfda98c | 378 | |
a79d3c27 JK |
379 | /* Get DR_STATUS from only the one LWP of INFERIOR_PTID. */ |
380 | ||
9bb9e8ad | 381 | static unsigned long |
430eaf2e | 382 | amd64_linux_dr_get_status (void) |
8cfda98c | 383 | { |
9f0bdab8 DJ |
384 | return amd64_linux_dr_get (inferior_ptid, DR_STATUS); |
385 | } | |
386 | ||
a79d3c27 JK |
387 | /* Unset MASK bits in DR_STATUS in all LWPs of LWP_LIST. */ |
388 | ||
389 | static void | |
390 | amd64_linux_dr_unset_status (unsigned long mask) | |
391 | { | |
392 | struct lwp_info *lp; | |
393 | ptid_t ptid; | |
394 | ||
395 | ALL_LWPS (lp, ptid) | |
396 | { | |
397 | unsigned long value; | |
398 | ||
399 | value = amd64_linux_dr_get (ptid, DR_STATUS); | |
400 | value &= ~mask; | |
401 | amd64_linux_dr_set (ptid, DR_STATUS, value); | |
402 | } | |
403 | } | |
404 | ||
405 | ||
9f0bdab8 DJ |
406 | static void |
407 | amd64_linux_new_thread (ptid_t ptid) | |
408 | { | |
409 | int i; | |
410 | ||
411 | for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) | |
412 | amd64_linux_dr_set (ptid, i, amd64_linux_dr[i]); | |
413 | ||
414 | amd64_linux_dr_set (ptid, DR_CONTROL, amd64_linux_dr[DR_CONTROL]); | |
8cfda98c | 415 | } |
5bca7895 | 416 | \f |
c43af07c | 417 | |
50d71875 AC |
418 | /* This function is called by libthread_db as part of its handling of |
419 | a request for a thread's local storage address. */ | |
420 | ||
5bca7895 | 421 | ps_err_e |
c43af07c EZ |
422 | ps_get_thread_area (const struct ps_prochandle *ph, |
423 | lwpid_t lwpid, int idx, void **base) | |
424 | { | |
a97b0ac8 | 425 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
50d71875 AC |
426 | { |
427 | /* The full structure is found in <asm-i386/ldt.h>. The second | |
428 | integer is the LDT's base_address and that is used to locate | |
429 | the thread's local storage. See i386-linux-nat.c more | |
430 | info. */ | |
431 | unsigned int desc[4]; | |
432 | ||
433 | /* This code assumes that "int" is 32 bits and that | |
434 | GET_THREAD_AREA returns no more than 4 int values. */ | |
435 | gdb_assert (sizeof (int) == 4); | |
436 | #ifndef PTRACE_GET_THREAD_AREA | |
437 | #define PTRACE_GET_THREAD_AREA 25 | |
438 | #endif | |
439 | if (ptrace (PTRACE_GET_THREAD_AREA, | |
440 | lwpid, (void *) (long) idx, (unsigned long) &desc) < 0) | |
441 | return PS_ERR; | |
442 | ||
443 | /* Extend the value to 64 bits. Here it's assumed that a "long" | |
444 | and a "void *" are the same. */ | |
445 | (*base) = (void *) (long) desc[1]; | |
446 | return PS_OK; | |
447 | } | |
448 | else | |
449 | { | |
450 | /* This definition comes from prctl.h, but some kernels may not | |
451 | have it. */ | |
c43af07c EZ |
452 | #ifndef PTRACE_ARCH_PRCTL |
453 | #define PTRACE_ARCH_PRCTL 30 | |
454 | #endif | |
50d71875 AC |
455 | /* FIXME: ezannoni-2003-07-09 see comment above about include |
456 | file order. We could be getting bogus values for these two. */ | |
457 | gdb_assert (FS < ELF_NGREG); | |
458 | gdb_assert (GS < ELF_NGREG); | |
459 | switch (idx) | |
460 | { | |
461 | case FS: | |
462 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
463 | return PS_OK; | |
464 | break; | |
465 | case GS: | |
466 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
467 | return PS_OK; | |
468 | break; | |
469 | default: /* Should not happen. */ | |
470 | return PS_BADADDR; | |
471 | } | |
c43af07c | 472 | } |
b6d42148 | 473 | return PS_ERR; /* ptrace failed. */ |
c43af07c | 474 | } |
5bca7895 | 475 | \f |
c43af07c | 476 | |
10d6c8cd DJ |
477 | static void (*super_post_startup_inferior) (ptid_t ptid); |
478 | ||
479 | static void | |
480 | amd64_linux_child_post_startup_inferior (ptid_t ptid) | |
4056d258 ML |
481 | { |
482 | i386_cleanup_dregs (); | |
10d6c8cd | 483 | super_post_startup_inferior (ptid); |
4056d258 | 484 | } |
60fac5b8 MK |
485 | \f |
486 | ||
5b009018 PA |
487 | /* When GDB is built as a 64-bit application on linux, the |
488 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since | |
489 | debugging a 32-bit inferior with a 64-bit GDB should look the same | |
490 | as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit | |
491 | conversion in-place ourselves. */ | |
492 | ||
493 | /* These types below (compat_*) define a siginfo type that is layout | |
494 | compatible with the siginfo type exported by the 32-bit userspace | |
495 | support. */ | |
496 | ||
497 | typedef int compat_int_t; | |
498 | typedef unsigned int compat_uptr_t; | |
499 | ||
500 | typedef int compat_time_t; | |
501 | typedef int compat_timer_t; | |
502 | typedef int compat_clock_t; | |
503 | ||
504 | struct compat_timeval | |
505 | { | |
506 | compat_time_t tv_sec; | |
507 | int tv_usec; | |
508 | }; | |
509 | ||
510 | typedef union compat_sigval | |
511 | { | |
512 | compat_int_t sival_int; | |
513 | compat_uptr_t sival_ptr; | |
514 | } compat_sigval_t; | |
515 | ||
516 | typedef struct compat_siginfo | |
517 | { | |
518 | int si_signo; | |
519 | int si_errno; | |
520 | int si_code; | |
521 | ||
522 | union | |
523 | { | |
524 | int _pad[((128 / sizeof (int)) - 3)]; | |
525 | ||
526 | /* kill() */ | |
527 | struct | |
528 | { | |
529 | unsigned int _pid; | |
530 | unsigned int _uid; | |
531 | } _kill; | |
532 | ||
533 | /* POSIX.1b timers */ | |
534 | struct | |
535 | { | |
536 | compat_timer_t _tid; | |
537 | int _overrun; | |
538 | compat_sigval_t _sigval; | |
539 | } _timer; | |
540 | ||
541 | /* POSIX.1b signals */ | |
542 | struct | |
543 | { | |
544 | unsigned int _pid; | |
545 | unsigned int _uid; | |
546 | compat_sigval_t _sigval; | |
547 | } _rt; | |
548 | ||
549 | /* SIGCHLD */ | |
550 | struct | |
551 | { | |
552 | unsigned int _pid; | |
553 | unsigned int _uid; | |
554 | int _status; | |
555 | compat_clock_t _utime; | |
556 | compat_clock_t _stime; | |
557 | } _sigchld; | |
558 | ||
559 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ | |
560 | struct | |
561 | { | |
562 | unsigned int _addr; | |
563 | } _sigfault; | |
564 | ||
565 | /* SIGPOLL */ | |
566 | struct | |
567 | { | |
568 | int _band; | |
569 | int _fd; | |
570 | } _sigpoll; | |
571 | } _sifields; | |
572 | } compat_siginfo_t; | |
573 | ||
574 | #define cpt_si_pid _sifields._kill._pid | |
575 | #define cpt_si_uid _sifields._kill._uid | |
576 | #define cpt_si_timerid _sifields._timer._tid | |
577 | #define cpt_si_overrun _sifields._timer._overrun | |
578 | #define cpt_si_status _sifields._sigchld._status | |
579 | #define cpt_si_utime _sifields._sigchld._utime | |
580 | #define cpt_si_stime _sifields._sigchld._stime | |
581 | #define cpt_si_ptr _sifields._rt._sigval.sival_ptr | |
582 | #define cpt_si_addr _sifields._sigfault._addr | |
583 | #define cpt_si_band _sifields._sigpoll._band | |
584 | #define cpt_si_fd _sifields._sigpoll._fd | |
585 | ||
14064aa2 DE |
586 | /* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun. |
587 | In their place is si_timer1,si_timer2. */ | |
588 | #ifndef si_timerid | |
589 | #define si_timerid si_timer1 | |
590 | #endif | |
591 | #ifndef si_overrun | |
592 | #define si_overrun si_timer2 | |
593 | #endif | |
594 | ||
5b009018 PA |
595 | static void |
596 | compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from) | |
597 | { | |
598 | memset (to, 0, sizeof (*to)); | |
599 | ||
600 | to->si_signo = from->si_signo; | |
601 | to->si_errno = from->si_errno; | |
602 | to->si_code = from->si_code; | |
603 | ||
604 | if (to->si_code < 0) | |
605 | { | |
606 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
607 | } | |
608 | else if (to->si_code == SI_USER) | |
609 | { | |
610 | to->cpt_si_pid = from->si_pid; | |
611 | to->cpt_si_uid = from->si_uid; | |
612 | } | |
613 | else if (to->si_code == SI_TIMER) | |
614 | { | |
615 | to->cpt_si_timerid = from->si_timerid; | |
616 | to->cpt_si_overrun = from->si_overrun; | |
617 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
618 | } | |
619 | else | |
620 | { | |
621 | switch (to->si_signo) | |
622 | { | |
623 | case SIGCHLD: | |
624 | to->cpt_si_pid = from->si_pid; | |
625 | to->cpt_si_uid = from->si_uid; | |
626 | to->cpt_si_status = from->si_status; | |
627 | to->cpt_si_utime = from->si_utime; | |
628 | to->cpt_si_stime = from->si_stime; | |
629 | break; | |
630 | case SIGILL: | |
631 | case SIGFPE: | |
632 | case SIGSEGV: | |
633 | case SIGBUS: | |
634 | to->cpt_si_addr = (intptr_t) from->si_addr; | |
635 | break; | |
636 | case SIGPOLL: | |
637 | to->cpt_si_band = from->si_band; | |
638 | to->cpt_si_fd = from->si_fd; | |
639 | break; | |
640 | default: | |
641 | to->cpt_si_pid = from->si_pid; | |
642 | to->cpt_si_uid = from->si_uid; | |
643 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
644 | break; | |
645 | } | |
646 | } | |
647 | } | |
648 | ||
649 | static void | |
650 | siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) | |
651 | { | |
652 | memset (to, 0, sizeof (*to)); | |
653 | ||
654 | to->si_signo = from->si_signo; | |
655 | to->si_errno = from->si_errno; | |
656 | to->si_code = from->si_code; | |
657 | ||
658 | if (to->si_code < 0) | |
659 | { | |
660 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
661 | } | |
662 | else if (to->si_code == SI_USER) | |
663 | { | |
664 | to->si_pid = from->cpt_si_pid; | |
665 | to->si_uid = from->cpt_si_uid; | |
666 | } | |
667 | else if (to->si_code == SI_TIMER) | |
668 | { | |
669 | to->si_timerid = from->cpt_si_timerid; | |
670 | to->si_overrun = from->cpt_si_overrun; | |
671 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
672 | } | |
673 | else | |
674 | { | |
675 | switch (to->si_signo) | |
676 | { | |
677 | case SIGCHLD: | |
678 | to->si_pid = from->cpt_si_pid; | |
679 | to->si_uid = from->cpt_si_uid; | |
680 | to->si_status = from->cpt_si_status; | |
681 | to->si_utime = from->cpt_si_utime; | |
682 | to->si_stime = from->cpt_si_stime; | |
683 | break; | |
684 | case SIGILL: | |
685 | case SIGFPE: | |
686 | case SIGSEGV: | |
687 | case SIGBUS: | |
688 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; | |
689 | break; | |
690 | case SIGPOLL: | |
691 | to->si_band = from->cpt_si_band; | |
692 | to->si_fd = from->cpt_si_fd; | |
693 | break; | |
694 | default: | |
695 | to->si_pid = from->cpt_si_pid; | |
696 | to->si_uid = from->cpt_si_uid; | |
697 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; | |
698 | break; | |
699 | } | |
700 | } | |
701 | } | |
702 | ||
703 | /* Convert a native/host siginfo object, into/from the siginfo in the | |
704 | layout of the inferiors' architecture. Returns true if any | |
705 | conversion was done; false otherwise. If DIRECTION is 1, then copy | |
706 | from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to | |
707 | INF. */ | |
708 | ||
709 | static int | |
710 | amd64_linux_siginfo_fixup (struct siginfo *native, gdb_byte *inf, int direction) | |
711 | { | |
712 | /* Is the inferior 32-bit? If so, then do fixup the siginfo | |
713 | object. */ | |
714 | if (gdbarch_addr_bit (get_frame_arch (get_current_frame ())) == 32) | |
715 | { | |
716 | gdb_assert (sizeof (struct siginfo) == sizeof (compat_siginfo_t)); | |
717 | ||
718 | if (direction == 0) | |
719 | compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, native); | |
720 | else | |
721 | siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf); | |
722 | ||
723 | return 1; | |
724 | } | |
725 | else | |
726 | return 0; | |
727 | } | |
728 | ||
90884b2b L |
729 | /* Get Linux/x86 target description from running target. |
730 | ||
731 | Value of CS segment register: | |
732 | 1. 64bit process: 0x33. | |
733 | 2. 32bit process: 0x23. | |
734 | */ | |
735 | ||
736 | #define AMD64_LINUX_USER64_CS 0x33 | |
737 | ||
738 | static const struct target_desc * | |
739 | amd64_linux_read_description (struct target_ops *ops) | |
740 | { | |
741 | unsigned long cs; | |
742 | int tid; | |
a055a187 L |
743 | int is_64bit; |
744 | static uint64_t xcr0; | |
90884b2b L |
745 | |
746 | /* GNU/Linux LWP ID's are process ID's. */ | |
747 | tid = TIDGET (inferior_ptid); | |
748 | if (tid == 0) | |
749 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
750 | ||
751 | /* Get CS register. */ | |
752 | errno = 0; | |
753 | cs = ptrace (PTRACE_PEEKUSER, tid, | |
754 | offsetof (struct user_regs_struct, cs), 0); | |
755 | if (errno != 0) | |
756 | perror_with_name (_("Couldn't get CS register")); | |
757 | ||
a055a187 L |
758 | is_64bit = cs == AMD64_LINUX_USER64_CS; |
759 | ||
760 | if (have_ptrace_getregset == -1) | |
761 | { | |
762 | uint64_t xstateregs[(I386_XSTATE_SSE_SIZE / sizeof (uint64_t))]; | |
763 | struct iovec iov; | |
764 | ||
765 | iov.iov_base = xstateregs; | |
766 | iov.iov_len = sizeof (xstateregs); | |
767 | ||
768 | /* Check if PTRACE_GETREGSET works. */ | |
769 | if (ptrace (PTRACE_GETREGSET, tid, | |
770 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
771 | have_ptrace_getregset = 0; | |
772 | else | |
773 | { | |
774 | have_ptrace_getregset = 1; | |
775 | ||
776 | /* Get XCR0 from XSAVE extended state. */ | |
777 | xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET | |
778 | / sizeof (uint64_t))]; | |
779 | } | |
780 | } | |
781 | ||
782 | /* Check the native XCR0 only if PTRACE_GETREGSET is available. */ | |
783 | if (have_ptrace_getregset | |
784 | && (xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK) | |
785 | { | |
786 | if (is_64bit) | |
787 | return tdesc_amd64_avx_linux; | |
788 | else | |
789 | return tdesc_i386_avx_linux; | |
790 | } | |
90884b2b | 791 | else |
a055a187 L |
792 | { |
793 | if (is_64bit) | |
794 | return tdesc_amd64_linux; | |
795 | else | |
796 | return tdesc_i386_linux; | |
797 | } | |
90884b2b L |
798 | } |
799 | ||
60fac5b8 | 800 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
430eaf2e | 801 | void _initialize_amd64_linux_nat (void); |
60fac5b8 MK |
802 | |
803 | void | |
430eaf2e | 804 | _initialize_amd64_linux_nat (void) |
60fac5b8 | 805 | { |
10d6c8cd DJ |
806 | struct target_ops *t; |
807 | ||
430eaf2e | 808 | amd64_native_gregset32_reg_offset = amd64_linux_gregset32_reg_offset; |
60fac5b8 | 809 | amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS; |
430eaf2e | 810 | amd64_native_gregset64_reg_offset = amd64_linux_gregset64_reg_offset; |
8695c747 | 811 | amd64_native_gregset64_num_regs = AMD64_LINUX_NUM_REGS; |
60fac5b8 | 812 | |
430eaf2e | 813 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset) |
60fac5b8 | 814 | == amd64_native_gregset32_num_regs); |
430eaf2e | 815 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset64_reg_offset) |
60fac5b8 | 816 | == amd64_native_gregset64_num_regs); |
10d6c8cd DJ |
817 | |
818 | /* Fill in the generic GNU/Linux methods. */ | |
819 | t = linux_target (); | |
820 | ||
c03374d5 DJ |
821 | i386_use_watchpoints (t); |
822 | ||
9bb9e8ad PM |
823 | i386_dr_low.set_control = amd64_linux_dr_set_control; |
824 | i386_dr_low.set_addr = amd64_linux_dr_set_addr; | |
825 | i386_dr_low.reset_addr = amd64_linux_dr_reset_addr; | |
826 | i386_dr_low.get_status = amd64_linux_dr_get_status; | |
a79d3c27 | 827 | i386_dr_low.unset_status = amd64_linux_dr_unset_status; |
9bb9e8ad PM |
828 | i386_set_debug_register_length (8); |
829 | ||
10d6c8cd DJ |
830 | /* Override the GNU/Linux inferior startup hook. */ |
831 | super_post_startup_inferior = t->to_post_startup_inferior; | |
832 | t->to_post_startup_inferior = amd64_linux_child_post_startup_inferior; | |
833 | ||
834 | /* Add our register access methods. */ | |
835 | t->to_fetch_registers = amd64_linux_fetch_inferior_registers; | |
836 | t->to_store_registers = amd64_linux_store_inferior_registers; | |
837 | ||
90884b2b L |
838 | t->to_read_description = amd64_linux_read_description; |
839 | ||
10d6c8cd | 840 | /* Register the target. */ |
f973ed9c | 841 | linux_nat_add_target (t); |
9f0bdab8 | 842 | linux_nat_set_new_thread (t, amd64_linux_new_thread); |
5b009018 | 843 | linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup); |
60fac5b8 | 844 | } |