Commit | Line | Data |
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e2879ccb MK |
1 | /* Target-dependent code for OpenBSD/amd64. |
2 | ||
618f726f | 3 | Copyright (C) 2003-2016 Free Software Foundation, Inc. |
e2879ccb MK |
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 |
e2879ccb MK |
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/>. */ |
e2879ccb MK |
19 | |
20 | #include "defs.h" | |
21 | #include "frame.h" | |
f6acec62 | 22 | #include "frame-unwind.h" |
e2879ccb | 23 | #include "gdbcore.h" |
911bc6ee MK |
24 | #include "symtab.h" |
25 | #include "objfiles.h" | |
e2879ccb | 26 | #include "osabi.h" |
d78749b4 | 27 | #include "regcache.h" |
30b344b1 | 28 | #include "regset.h" |
e2879ccb | 29 | #include "target.h" |
f6acec62 | 30 | #include "trad-frame.h" |
e2879ccb | 31 | |
93ffa5b9 | 32 | #include "obsd-tdep.h" |
85be1ca6 | 33 | #include "amd64-tdep.h" |
30b344b1 | 34 | #include "i387-tdep.h" |
7e654c37 | 35 | #include "solib-svr4.h" |
d78749b4 | 36 | #include "bsd-uthread.h" |
30b344b1 MK |
37 | |
38 | /* Support for core dumps. */ | |
39 | ||
40 | static void | |
41 | amd64obsd_supply_regset (const struct regset *regset, | |
42 | struct regcache *regcache, int regnum, | |
43 | const void *regs, size_t len) | |
44 | { | |
09424cff AA |
45 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
46 | const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
30b344b1 MK |
47 | |
48 | gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE); | |
49 | ||
50 | i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset); | |
d8de1ef7 MK |
51 | amd64_supply_fxsave (regcache, regnum, |
52 | ((const gdb_byte *)regs) + tdep->sizeof_gregset); | |
30b344b1 MK |
53 | } |
54 | ||
ecc37a5a AA |
55 | static const struct regset amd64obsd_combined_regset = |
56 | { | |
57 | NULL, amd64obsd_supply_regset, NULL | |
58 | }; | |
59 | ||
490496c3 AA |
60 | static void |
61 | amd64obsd_iterate_over_regset_sections (struct gdbarch *gdbarch, | |
62 | iterate_over_regset_sections_cb *cb, | |
63 | void *cb_data, | |
64 | const struct regcache *regcache) | |
30b344b1 MK |
65 | { |
66 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
67 | ||
68 | /* OpenBSD core dumps don't use seperate register sets for the | |
69 | general-purpose and floating-point registers. */ | |
70 | ||
490496c3 AA |
71 | cb (".reg", tdep->sizeof_gregset + I387_SIZEOF_FXSAVE, |
72 | &amd64obsd_combined_regset, NULL, cb_data); | |
30b344b1 MK |
73 | } |
74 | \f | |
e2879ccb MK |
75 | |
76 | /* Support for signal handlers. */ | |
77 | ||
911bc6ee | 78 | /* Default page size. */ |
e2879ccb MK |
79 | static const int amd64obsd_page_size = 4096; |
80 | ||
10458914 DJ |
81 | /* Return whether THIS_FRAME corresponds to an OpenBSD sigtramp |
82 | routine. */ | |
911bc6ee | 83 | |
e2879ccb | 84 | static int |
10458914 | 85 | amd64obsd_sigtramp_p (struct frame_info *this_frame) |
e2879ccb | 86 | { |
10458914 | 87 | CORE_ADDR pc = get_frame_pc (this_frame); |
e2879ccb | 88 | CORE_ADDR start_pc = (pc & ~(amd64obsd_page_size - 1)); |
0dcddd84 | 89 | const gdb_byte osigreturn[] = |
e2879ccb MK |
90 | { |
91 | 0x48, 0xc7, 0xc0, | |
92 | 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */ | |
84d04465 | 93 | 0xcd, 0x80 /* int $0x80 */ |
e2879ccb | 94 | }; |
0dcddd84 MK |
95 | const gdb_byte sigreturn[] = |
96 | { | |
97 | 0x48, 0xc7, 0xc0, | |
98 | 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */ | |
99 | 0x0f, 0x05 /* syscall */ | |
100 | }; | |
1c5bf419 | 101 | size_t buflen = (sizeof sigreturn) + 1; |
d8de1ef7 | 102 | gdb_byte *buf; |
2c02bd72 | 103 | const char *name; |
911bc6ee MK |
104 | |
105 | /* If the function has a valid symbol name, it isn't a | |
106 | trampoline. */ | |
107 | find_pc_partial_function (pc, &name, NULL, NULL); | |
108 | if (name != NULL) | |
109 | return 0; | |
e2879ccb | 110 | |
911bc6ee MK |
111 | /* If the function lives in a valid section (even without a starting |
112 | point) it isn't a trampoline. */ | |
113 | if (find_pc_section (pc) != NULL) | |
e2879ccb MK |
114 | return 0; |
115 | ||
116 | /* If we can't read the instructions at START_PC, return zero. */ | |
224c3ddb | 117 | buf = (gdb_byte *) alloca ((sizeof sigreturn) + 1); |
10458914 | 118 | if (!safe_frame_unwind_memory (this_frame, start_pc + 6, buf, buflen)) |
e2879ccb MK |
119 | return 0; |
120 | ||
4cd28409 MK |
121 | /* Check for sigreturn(2). Depending on how the assembler encoded |
122 | the `movq %rsp, %rdi' instruction, the code starts at offset 6 or | |
0dcddd84 MK |
123 | 7. OpenBSD 5.0 and later use the `syscall' instruction. Older |
124 | versions use `int $0x80'. Check for both. */ | |
4cd28409 | 125 | if (memcmp (buf, sigreturn, sizeof sigreturn) |
0dcddd84 MK |
126 | && memcmp (buf + 1, sigreturn, sizeof sigreturn) |
127 | && memcmp (buf, osigreturn, sizeof osigreturn) | |
128 | && memcmp (buf + 1, osigreturn, sizeof osigreturn)) | |
e2879ccb MK |
129 | return 0; |
130 | ||
131 | return 1; | |
132 | } | |
133 | ||
10458914 DJ |
134 | /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the |
135 | address of the associated sigcontext structure. */ | |
e2879ccb MK |
136 | |
137 | static CORE_ADDR | |
10458914 | 138 | amd64obsd_sigcontext_addr (struct frame_info *this_frame) |
e2879ccb | 139 | { |
10458914 | 140 | CORE_ADDR pc = get_frame_pc (this_frame); |
0fe85704 MK |
141 | ULONGEST offset = (pc & (amd64obsd_page_size - 1)); |
142 | ||
e2879ccb | 143 | /* The %rsp register points at `struct sigcontext' upon entry of a |
0fe85704 MK |
144 | signal trampoline. The relevant part of the trampoline is |
145 | ||
146 | call *%rax | |
147 | movq %rsp, %rdi | |
148 | pushq %rdi | |
149 | movq $SYS_sigreturn,%rax | |
150 | int $0x80 | |
151 | ||
152 | (see /usr/src/sys/arch/amd64/amd64/locore.S). The `pushq' | |
153 | instruction clobbers %rsp, but its value is saved in `%rdi'. */ | |
154 | ||
4cd28409 | 155 | if (offset > 5) |
10458914 | 156 | return get_frame_register_unsigned (this_frame, AMD64_RDI_REGNUM); |
0fe85704 | 157 | else |
10458914 | 158 | return get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM); |
e2879ccb MK |
159 | } |
160 | \f | |
161 | /* OpenBSD 3.5 or later. */ | |
162 | ||
163 | /* Mapping between the general-purpose registers in `struct reg' | |
164 | format and GDB's register cache layout. */ | |
165 | ||
30b344b1 | 166 | /* From <machine/reg.h>. */ |
e2879ccb MK |
167 | int amd64obsd_r_reg_offset[] = |
168 | { | |
169 | 14 * 8, /* %rax */ | |
170 | 13 * 8, /* %rbx */ | |
171 | 3 * 8, /* %rcx */ | |
172 | 2 * 8, /* %rdx */ | |
173 | 1 * 8, /* %rsi */ | |
174 | 0 * 8, /* %rdi */ | |
175 | 12 * 8, /* %rbp */ | |
176 | 15 * 8, /* %rsp */ | |
0963b4bd | 177 | 4 * 8, /* %r8 .. */ |
e2879ccb MK |
178 | 5 * 8, |
179 | 6 * 8, | |
180 | 7 * 8, | |
181 | 8 * 8, | |
182 | 9 * 8, | |
183 | 10 * 8, | |
184 | 11 * 8, /* ... %r15 */ | |
185 | 16 * 8, /* %rip */ | |
186 | 17 * 8, /* %eflags */ | |
187 | 18 * 8, /* %cs */ | |
188 | 19 * 8, /* %ss */ | |
189 | 20 * 8, /* %ds */ | |
190 | 21 * 8, /* %es */ | |
191 | 22 * 8, /* %fs */ | |
192 | 23 * 8 /* %gs */ | |
193 | }; | |
194 | ||
30b344b1 | 195 | /* From <machine/signal.h>. */ |
e2879ccb MK |
196 | static int amd64obsd_sc_reg_offset[] = |
197 | { | |
198 | 14 * 8, /* %rax */ | |
199 | 13 * 8, /* %rbx */ | |
200 | 3 * 8, /* %rcx */ | |
201 | 2 * 8, /* %rdx */ | |
202 | 1 * 8, /* %rsi */ | |
203 | 0 * 8, /* %rdi */ | |
204 | 12 * 8, /* %rbp */ | |
205 | 24 * 8, /* %rsp */ | |
0963b4bd | 206 | 4 * 8, /* %r8 ... */ |
e2879ccb MK |
207 | 5 * 8, |
208 | 6 * 8, | |
209 | 7 * 8, | |
210 | 8 * 8, | |
211 | 9 * 8, | |
212 | 10 * 8, | |
213 | 11 * 8, /* ... %r15 */ | |
214 | 21 * 8, /* %rip */ | |
215 | 23 * 8, /* %eflags */ | |
216 | 22 * 8, /* %cs */ | |
217 | 25 * 8, /* %ss */ | |
218 | 18 * 8, /* %ds */ | |
219 | 17 * 8, /* %es */ | |
220 | 16 * 8, /* %fs */ | |
221 | 15 * 8 /* %gs */ | |
222 | }; | |
223 | ||
d78749b4 MK |
224 | /* From /usr/src/lib/libpthread/arch/amd64/uthread_machdep.c. */ |
225 | static int amd64obsd_uthread_reg_offset[] = | |
226 | { | |
227 | 19 * 8, /* %rax */ | |
228 | 16 * 8, /* %rbx */ | |
229 | 18 * 8, /* %rcx */ | |
230 | 17 * 8, /* %rdx */ | |
231 | 14 * 8, /* %rsi */ | |
232 | 13 * 8, /* %rdi */ | |
233 | 15 * 8, /* %rbp */ | |
234 | -1, /* %rsp */ | |
0963b4bd | 235 | 12 * 8, /* %r8 ... */ |
d78749b4 MK |
236 | 11 * 8, |
237 | 10 * 8, | |
238 | 9 * 8, | |
239 | 8 * 8, | |
240 | 7 * 8, | |
241 | 6 * 8, | |
242 | 5 * 8, /* ... %r15 */ | |
243 | 20 * 8, /* %rip */ | |
244 | 4 * 8, /* %eflags */ | |
245 | 21 * 8, /* %cs */ | |
246 | -1, /* %ss */ | |
247 | 3 * 8, /* %ds */ | |
248 | 2 * 8, /* %es */ | |
249 | 1 * 8, /* %fs */ | |
250 | 0 * 8 /* %gs */ | |
251 | }; | |
252 | ||
253 | /* Offset within the thread structure where we can find the saved | |
254 | stack pointer (%esp). */ | |
255 | #define AMD64OBSD_UTHREAD_RSP_OFFSET 400 | |
256 | ||
257 | static void | |
258 | amd64obsd_supply_uthread (struct regcache *regcache, | |
259 | int regnum, CORE_ADDR addr) | |
260 | { | |
e17a4113 UW |
261 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
262 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d78749b4 MK |
263 | CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET; |
264 | CORE_ADDR sp = 0; | |
265 | gdb_byte buf[8]; | |
266 | int i; | |
267 | ||
268 | gdb_assert (regnum >= -1); | |
269 | ||
270 | if (regnum == -1 || regnum == AMD64_RSP_REGNUM) | |
271 | { | |
272 | int offset; | |
273 | ||
274 | /* Fetch stack pointer from thread structure. */ | |
e17a4113 | 275 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
276 | |
277 | /* Adjust the stack pointer such that it looks as if we just | |
278 | returned from _thread_machdep_switch. */ | |
279 | offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8; | |
e17a4113 | 280 | store_unsigned_integer (buf, 8, byte_order, sp + offset); |
d78749b4 MK |
281 | regcache_raw_supply (regcache, AMD64_RSP_REGNUM, buf); |
282 | } | |
283 | ||
284 | for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++) | |
285 | { | |
286 | if (amd64obsd_uthread_reg_offset[i] != -1 | |
287 | && (regnum == -1 || regnum == i)) | |
288 | { | |
289 | /* Fetch stack pointer from thread structure (if we didn't | |
290 | do so already). */ | |
291 | if (sp == 0) | |
e17a4113 | 292 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
293 | |
294 | /* Read the saved register from the stack frame. */ | |
295 | read_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8); | |
296 | regcache_raw_supply (regcache, i, buf); | |
297 | } | |
298 | } | |
299 | } | |
300 | ||
301 | static void | |
302 | amd64obsd_collect_uthread (const struct regcache *regcache, | |
303 | int regnum, CORE_ADDR addr) | |
304 | { | |
e17a4113 UW |
305 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
306 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d78749b4 MK |
307 | CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET; |
308 | CORE_ADDR sp = 0; | |
309 | gdb_byte buf[8]; | |
310 | int i; | |
311 | ||
312 | gdb_assert (regnum >= -1); | |
313 | ||
314 | if (regnum == -1 || regnum == AMD64_RSP_REGNUM) | |
315 | { | |
316 | int offset; | |
317 | ||
318 | /* Calculate the stack pointer (frame pointer) that will be | |
319 | stored into the thread structure. */ | |
320 | offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8; | |
321 | regcache_raw_collect (regcache, AMD64_RSP_REGNUM, buf); | |
e17a4113 | 322 | sp = extract_unsigned_integer (buf, 8, byte_order) - offset; |
d78749b4 MK |
323 | |
324 | /* Store the stack pointer. */ | |
e17a4113 | 325 | write_memory_unsigned_integer (sp_addr, 8, byte_order, sp); |
d78749b4 MK |
326 | |
327 | /* The stack pointer was (potentially) modified. Make sure we | |
328 | build a proper stack frame. */ | |
329 | regnum = -1; | |
330 | } | |
331 | ||
332 | for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++) | |
333 | { | |
334 | if (amd64obsd_uthread_reg_offset[i] != -1 | |
335 | && (regnum == -1 || regnum == i)) | |
336 | { | |
337 | /* Fetch stack pointer from thread structure (if we didn't | |
338 | calculate it already). */ | |
339 | if (sp == 0) | |
e17a4113 | 340 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
341 | |
342 | /* Write the register into the stack frame. */ | |
343 | regcache_raw_collect (regcache, i, buf); | |
344 | write_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8); | |
345 | } | |
346 | } | |
347 | } | |
f6acec62 MK |
348 | /* Kernel debugging support. */ |
349 | ||
350 | /* From <machine/frame.h>. Easy since `struct trapframe' matches | |
351 | `struct sigcontext'. */ | |
352 | #define amd64obsd_tf_reg_offset amd64obsd_sc_reg_offset | |
353 | ||
354 | static struct trad_frame_cache * | |
10458914 | 355 | amd64obsd_trapframe_cache (struct frame_info *this_frame, void **this_cache) |
f6acec62 | 356 | { |
e17a4113 UW |
357 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
358 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
f6acec62 MK |
359 | struct trad_frame_cache *cache; |
360 | CORE_ADDR func, sp, addr; | |
361 | ULONGEST cs; | |
2c02bd72 | 362 | const char *name; |
f6acec62 MK |
363 | int i; |
364 | ||
365 | if (*this_cache) | |
9a3c8263 | 366 | return (struct trad_frame_cache *) *this_cache; |
f6acec62 | 367 | |
10458914 | 368 | cache = trad_frame_cache_zalloc (this_frame); |
f6acec62 MK |
369 | *this_cache = cache; |
370 | ||
10458914 DJ |
371 | func = get_frame_func (this_frame); |
372 | sp = get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM); | |
f6acec62 MK |
373 | |
374 | find_pc_partial_function (func, &name, NULL, NULL); | |
61012eef | 375 | if (name && startswith (name, "Xintr")) |
f6acec62 MK |
376 | addr = sp + 8; /* It's an interrupt frame. */ |
377 | else | |
378 | addr = sp; | |
379 | ||
380 | for (i = 0; i < ARRAY_SIZE (amd64obsd_tf_reg_offset); i++) | |
381 | if (amd64obsd_tf_reg_offset[i] != -1) | |
382 | trad_frame_set_reg_addr (cache, i, addr + amd64obsd_tf_reg_offset[i]); | |
383 | ||
384 | /* Read %cs from trap frame. */ | |
7238f002 | 385 | addr += amd64obsd_tf_reg_offset[AMD64_CS_REGNUM]; |
e17a4113 | 386 | cs = read_memory_unsigned_integer (addr, 8, byte_order); |
f6acec62 MK |
387 | if ((cs & I386_SEL_RPL) == I386_SEL_UPL) |
388 | { | |
6d566cff | 389 | /* Trap from user space; terminate backtrace. */ |
005ca36a | 390 | trad_frame_set_id (cache, outer_frame_id); |
f6acec62 MK |
391 | } |
392 | else | |
393 | { | |
394 | /* Construct the frame ID using the function start. */ | |
395 | trad_frame_set_id (cache, frame_id_build (sp + 16, func)); | |
396 | } | |
397 | ||
398 | return cache; | |
399 | } | |
400 | ||
401 | static void | |
10458914 | 402 | amd64obsd_trapframe_this_id (struct frame_info *this_frame, |
f6acec62 MK |
403 | void **this_cache, struct frame_id *this_id) |
404 | { | |
405 | struct trad_frame_cache *cache = | |
10458914 | 406 | amd64obsd_trapframe_cache (this_frame, this_cache); |
f6acec62 MK |
407 | |
408 | trad_frame_get_id (cache, this_id); | |
409 | } | |
410 | ||
10458914 DJ |
411 | static struct value * |
412 | amd64obsd_trapframe_prev_register (struct frame_info *this_frame, | |
413 | void **this_cache, int regnum) | |
f6acec62 MK |
414 | { |
415 | struct trad_frame_cache *cache = | |
10458914 | 416 | amd64obsd_trapframe_cache (this_frame, this_cache); |
f6acec62 | 417 | |
10458914 | 418 | return trad_frame_get_register (cache, this_frame, regnum); |
f6acec62 MK |
419 | } |
420 | ||
421 | static int | |
422 | amd64obsd_trapframe_sniffer (const struct frame_unwind *self, | |
10458914 | 423 | struct frame_info *this_frame, |
f6acec62 MK |
424 | void **this_prologue_cache) |
425 | { | |
426 | ULONGEST cs; | |
2c02bd72 | 427 | const char *name; |
f6acec62 | 428 | |
e5cc6d11 | 429 | /* Check Current Privilege Level and bail out if we're not executing |
6d566cff | 430 | in kernel space. */ |
10458914 | 431 | cs = get_frame_register_unsigned (this_frame, AMD64_CS_REGNUM); |
f6acec62 MK |
432 | if ((cs & I386_SEL_RPL) == I386_SEL_UPL) |
433 | return 0; | |
434 | ||
10458914 | 435 | find_pc_partial_function (get_frame_pc (this_frame), &name, NULL, NULL); |
f6acec62 MK |
436 | return (name && ((strcmp (name, "calltrap") == 0) |
437 | || (strcmp (name, "osyscall1") == 0) | |
438 | || (strcmp (name, "Xsyscall") == 0) | |
61012eef | 439 | || (startswith (name, "Xintr")))); |
f6acec62 MK |
440 | } |
441 | ||
442 | static const struct frame_unwind amd64obsd_trapframe_unwind = { | |
443 | /* FIXME: kettenis/20051219: This really is more like an interrupt | |
444 | frame, but SIGTRAMP_FRAME would print <signal handler called>, | |
445 | which really is not what we want here. */ | |
446 | NORMAL_FRAME, | |
8fbca658 | 447 | default_frame_unwind_stop_reason, |
f6acec62 MK |
448 | amd64obsd_trapframe_this_id, |
449 | amd64obsd_trapframe_prev_register, | |
450 | NULL, | |
451 | amd64obsd_trapframe_sniffer | |
452 | }; | |
453 | \f | |
d78749b4 | 454 | |
e2879ccb MK |
455 | static void |
456 | amd64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
457 | { | |
458 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
459 | ||
90f90721 | 460 | amd64_init_abi (info, gdbarch); |
93ffa5b9 | 461 | obsd_init_abi (info, gdbarch); |
e2879ccb | 462 | |
30b344b1 MK |
463 | /* Initialize general-purpose register set details. */ |
464 | tdep->gregset_reg_offset = amd64obsd_r_reg_offset; | |
465 | tdep->gregset_num_regs = ARRAY_SIZE (amd64obsd_r_reg_offset); | |
466 | tdep->sizeof_gregset = 24 * 8; | |
467 | ||
e2879ccb MK |
468 | tdep->jb_pc_offset = 7 * 8; |
469 | ||
911bc6ee | 470 | tdep->sigtramp_p = amd64obsd_sigtramp_p; |
e2879ccb MK |
471 | tdep->sigcontext_addr = amd64obsd_sigcontext_addr; |
472 | tdep->sc_reg_offset = amd64obsd_sc_reg_offset; | |
473 | tdep->sc_num_regs = ARRAY_SIZE (amd64obsd_sc_reg_offset); | |
7e654c37 | 474 | |
d78749b4 MK |
475 | /* OpenBSD provides a user-level threads implementation. */ |
476 | bsd_uthread_set_supply_uthread (gdbarch, amd64obsd_supply_uthread); | |
477 | bsd_uthread_set_collect_uthread (gdbarch, amd64obsd_collect_uthread); | |
478 | ||
7e654c37 MK |
479 | /* OpenBSD uses SVR4-style shared libraries. */ |
480 | set_solib_svr4_fetch_link_map_offsets | |
481 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
f6acec62 MK |
482 | |
483 | /* Unwind kernel trap frames correctly. */ | |
484 | frame_unwind_prepend_unwinder (gdbarch, &amd64obsd_trapframe_unwind); | |
e2879ccb | 485 | } |
a3e3e961 MK |
486 | |
487 | /* Traditional (a.out) NetBSD-style core dumps. */ | |
488 | ||
489 | static void | |
490 | amd64obsd_core_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
491 | { | |
492 | amd64obsd_init_abi (info, gdbarch); | |
493 | ||
490496c3 AA |
494 | set_gdbarch_iterate_over_regset_sections |
495 | (gdbarch, amd64obsd_iterate_over_regset_sections); | |
a3e3e961 | 496 | } |
e2879ccb MK |
497 | \f |
498 | ||
499 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
500 | void _initialize_amd64obsd_tdep (void); | |
501 | ||
502 | void | |
30b344b1 | 503 | _initialize_amd64obsd_tdep (void) |
e2879ccb MK |
504 | { |
505 | /* The OpenBSD/amd64 native dependent code makes this assumption. */ | |
90f90721 | 506 | gdb_assert (ARRAY_SIZE (amd64obsd_r_reg_offset) == AMD64_NUM_GREGS); |
e2879ccb MK |
507 | |
508 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
509 | GDB_OSABI_OPENBSD_ELF, amd64obsd_init_abi); | |
30b344b1 MK |
510 | |
511 | /* OpenBSD uses traditional (a.out) NetBSD-style core dumps. */ | |
512 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
a3e3e961 | 513 | GDB_OSABI_NETBSD_AOUT, amd64obsd_core_init_abi); |
e2879ccb | 514 | } |