Commit | Line | Data |
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e2879ccb MK |
1 | /* Target-dependent code for OpenBSD/amd64. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2003-2014 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 MK |
31 | |
32 | #include "gdb_assert.h" | |
0e9f083f | 33 | #include <string.h> |
e2879ccb | 34 | |
93ffa5b9 | 35 | #include "obsd-tdep.h" |
85be1ca6 | 36 | #include "amd64-tdep.h" |
30b344b1 | 37 | #include "i387-tdep.h" |
7e654c37 | 38 | #include "solib-svr4.h" |
d78749b4 | 39 | #include "bsd-uthread.h" |
30b344b1 MK |
40 | |
41 | /* Support for core dumps. */ | |
42 | ||
43 | static void | |
44 | amd64obsd_supply_regset (const struct regset *regset, | |
45 | struct regcache *regcache, int regnum, | |
46 | const void *regs, size_t len) | |
47 | { | |
9ea75c57 | 48 | const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch); |
30b344b1 MK |
49 | |
50 | gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE); | |
51 | ||
52 | i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset); | |
d8de1ef7 MK |
53 | amd64_supply_fxsave (regcache, regnum, |
54 | ((const gdb_byte *)regs) + tdep->sizeof_gregset); | |
30b344b1 MK |
55 | } |
56 | ||
57 | static const struct regset * | |
58 | amd64obsd_regset_from_core_section (struct gdbarch *gdbarch, | |
59 | const char *sect_name, size_t sect_size) | |
60 | { | |
61 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
62 | ||
63 | /* OpenBSD core dumps don't use seperate register sets for the | |
64 | general-purpose and floating-point registers. */ | |
65 | ||
66 | if (strcmp (sect_name, ".reg") == 0 | |
67 | && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE) | |
68 | { | |
69 | if (tdep->gregset == NULL) | |
9ea75c57 | 70 | tdep->gregset = regset_alloc (gdbarch, amd64obsd_supply_regset, NULL); |
30b344b1 MK |
71 | return tdep->gregset; |
72 | } | |
73 | ||
74 | return NULL; | |
75 | } | |
76 | \f | |
e2879ccb MK |
77 | |
78 | /* Support for signal handlers. */ | |
79 | ||
911bc6ee | 80 | /* Default page size. */ |
e2879ccb MK |
81 | static const int amd64obsd_page_size = 4096; |
82 | ||
10458914 DJ |
83 | /* Return whether THIS_FRAME corresponds to an OpenBSD sigtramp |
84 | routine. */ | |
911bc6ee | 85 | |
e2879ccb | 86 | static int |
10458914 | 87 | amd64obsd_sigtramp_p (struct frame_info *this_frame) |
e2879ccb | 88 | { |
10458914 | 89 | CORE_ADDR pc = get_frame_pc (this_frame); |
e2879ccb | 90 | CORE_ADDR start_pc = (pc & ~(amd64obsd_page_size - 1)); |
0dcddd84 | 91 | const gdb_byte osigreturn[] = |
e2879ccb MK |
92 | { |
93 | 0x48, 0xc7, 0xc0, | |
94 | 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */ | |
84d04465 | 95 | 0xcd, 0x80 /* int $0x80 */ |
e2879ccb | 96 | }; |
0dcddd84 MK |
97 | const gdb_byte sigreturn[] = |
98 | { | |
99 | 0x48, 0xc7, 0xc0, | |
100 | 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */ | |
101 | 0x0f, 0x05 /* syscall */ | |
102 | }; | |
1c5bf419 | 103 | size_t buflen = (sizeof sigreturn) + 1; |
d8de1ef7 | 104 | gdb_byte *buf; |
2c02bd72 | 105 | const char *name; |
911bc6ee MK |
106 | |
107 | /* If the function has a valid symbol name, it isn't a | |
108 | trampoline. */ | |
109 | find_pc_partial_function (pc, &name, NULL, NULL); | |
110 | if (name != NULL) | |
111 | return 0; | |
e2879ccb | 112 | |
911bc6ee MK |
113 | /* If the function lives in a valid section (even without a starting |
114 | point) it isn't a trampoline. */ | |
115 | if (find_pc_section (pc) != NULL) | |
e2879ccb MK |
116 | return 0; |
117 | ||
118 | /* If we can't read the instructions at START_PC, return zero. */ | |
4cd28409 | 119 | buf = alloca ((sizeof sigreturn) + 1); |
10458914 | 120 | if (!safe_frame_unwind_memory (this_frame, start_pc + 6, buf, buflen)) |
e2879ccb MK |
121 | return 0; |
122 | ||
4cd28409 MK |
123 | /* Check for sigreturn(2). Depending on how the assembler encoded |
124 | the `movq %rsp, %rdi' instruction, the code starts at offset 6 or | |
0dcddd84 MK |
125 | 7. OpenBSD 5.0 and later use the `syscall' instruction. Older |
126 | versions use `int $0x80'. Check for both. */ | |
4cd28409 | 127 | if (memcmp (buf, sigreturn, sizeof sigreturn) |
0dcddd84 MK |
128 | && memcmp (buf + 1, sigreturn, sizeof sigreturn) |
129 | && memcmp (buf, osigreturn, sizeof osigreturn) | |
130 | && memcmp (buf + 1, osigreturn, sizeof osigreturn)) | |
e2879ccb MK |
131 | return 0; |
132 | ||
133 | return 1; | |
134 | } | |
135 | ||
10458914 DJ |
136 | /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the |
137 | address of the associated sigcontext structure. */ | |
e2879ccb MK |
138 | |
139 | static CORE_ADDR | |
10458914 | 140 | amd64obsd_sigcontext_addr (struct frame_info *this_frame) |
e2879ccb | 141 | { |
10458914 | 142 | CORE_ADDR pc = get_frame_pc (this_frame); |
0fe85704 MK |
143 | ULONGEST offset = (pc & (amd64obsd_page_size - 1)); |
144 | ||
e2879ccb | 145 | /* The %rsp register points at `struct sigcontext' upon entry of a |
0fe85704 MK |
146 | signal trampoline. The relevant part of the trampoline is |
147 | ||
148 | call *%rax | |
149 | movq %rsp, %rdi | |
150 | pushq %rdi | |
151 | movq $SYS_sigreturn,%rax | |
152 | int $0x80 | |
153 | ||
154 | (see /usr/src/sys/arch/amd64/amd64/locore.S). The `pushq' | |
155 | instruction clobbers %rsp, but its value is saved in `%rdi'. */ | |
156 | ||
4cd28409 | 157 | if (offset > 5) |
10458914 | 158 | return get_frame_register_unsigned (this_frame, AMD64_RDI_REGNUM); |
0fe85704 | 159 | else |
10458914 | 160 | return get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM); |
e2879ccb MK |
161 | } |
162 | \f | |
163 | /* OpenBSD 3.5 or later. */ | |
164 | ||
165 | /* Mapping between the general-purpose registers in `struct reg' | |
166 | format and GDB's register cache layout. */ | |
167 | ||
30b344b1 | 168 | /* From <machine/reg.h>. */ |
e2879ccb MK |
169 | int amd64obsd_r_reg_offset[] = |
170 | { | |
171 | 14 * 8, /* %rax */ | |
172 | 13 * 8, /* %rbx */ | |
173 | 3 * 8, /* %rcx */ | |
174 | 2 * 8, /* %rdx */ | |
175 | 1 * 8, /* %rsi */ | |
176 | 0 * 8, /* %rdi */ | |
177 | 12 * 8, /* %rbp */ | |
178 | 15 * 8, /* %rsp */ | |
0963b4bd | 179 | 4 * 8, /* %r8 .. */ |
e2879ccb MK |
180 | 5 * 8, |
181 | 6 * 8, | |
182 | 7 * 8, | |
183 | 8 * 8, | |
184 | 9 * 8, | |
185 | 10 * 8, | |
186 | 11 * 8, /* ... %r15 */ | |
187 | 16 * 8, /* %rip */ | |
188 | 17 * 8, /* %eflags */ | |
189 | 18 * 8, /* %cs */ | |
190 | 19 * 8, /* %ss */ | |
191 | 20 * 8, /* %ds */ | |
192 | 21 * 8, /* %es */ | |
193 | 22 * 8, /* %fs */ | |
194 | 23 * 8 /* %gs */ | |
195 | }; | |
196 | ||
30b344b1 | 197 | /* From <machine/signal.h>. */ |
e2879ccb MK |
198 | static int amd64obsd_sc_reg_offset[] = |
199 | { | |
200 | 14 * 8, /* %rax */ | |
201 | 13 * 8, /* %rbx */ | |
202 | 3 * 8, /* %rcx */ | |
203 | 2 * 8, /* %rdx */ | |
204 | 1 * 8, /* %rsi */ | |
205 | 0 * 8, /* %rdi */ | |
206 | 12 * 8, /* %rbp */ | |
207 | 24 * 8, /* %rsp */ | |
0963b4bd | 208 | 4 * 8, /* %r8 ... */ |
e2879ccb MK |
209 | 5 * 8, |
210 | 6 * 8, | |
211 | 7 * 8, | |
212 | 8 * 8, | |
213 | 9 * 8, | |
214 | 10 * 8, | |
215 | 11 * 8, /* ... %r15 */ | |
216 | 21 * 8, /* %rip */ | |
217 | 23 * 8, /* %eflags */ | |
218 | 22 * 8, /* %cs */ | |
219 | 25 * 8, /* %ss */ | |
220 | 18 * 8, /* %ds */ | |
221 | 17 * 8, /* %es */ | |
222 | 16 * 8, /* %fs */ | |
223 | 15 * 8 /* %gs */ | |
224 | }; | |
225 | ||
d78749b4 MK |
226 | /* From /usr/src/lib/libpthread/arch/amd64/uthread_machdep.c. */ |
227 | static int amd64obsd_uthread_reg_offset[] = | |
228 | { | |
229 | 19 * 8, /* %rax */ | |
230 | 16 * 8, /* %rbx */ | |
231 | 18 * 8, /* %rcx */ | |
232 | 17 * 8, /* %rdx */ | |
233 | 14 * 8, /* %rsi */ | |
234 | 13 * 8, /* %rdi */ | |
235 | 15 * 8, /* %rbp */ | |
236 | -1, /* %rsp */ | |
0963b4bd | 237 | 12 * 8, /* %r8 ... */ |
d78749b4 MK |
238 | 11 * 8, |
239 | 10 * 8, | |
240 | 9 * 8, | |
241 | 8 * 8, | |
242 | 7 * 8, | |
243 | 6 * 8, | |
244 | 5 * 8, /* ... %r15 */ | |
245 | 20 * 8, /* %rip */ | |
246 | 4 * 8, /* %eflags */ | |
247 | 21 * 8, /* %cs */ | |
248 | -1, /* %ss */ | |
249 | 3 * 8, /* %ds */ | |
250 | 2 * 8, /* %es */ | |
251 | 1 * 8, /* %fs */ | |
252 | 0 * 8 /* %gs */ | |
253 | }; | |
254 | ||
255 | /* Offset within the thread structure where we can find the saved | |
256 | stack pointer (%esp). */ | |
257 | #define AMD64OBSD_UTHREAD_RSP_OFFSET 400 | |
258 | ||
259 | static void | |
260 | amd64obsd_supply_uthread (struct regcache *regcache, | |
261 | int regnum, CORE_ADDR addr) | |
262 | { | |
e17a4113 UW |
263 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
264 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d78749b4 MK |
265 | CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET; |
266 | CORE_ADDR sp = 0; | |
267 | gdb_byte buf[8]; | |
268 | int i; | |
269 | ||
270 | gdb_assert (regnum >= -1); | |
271 | ||
272 | if (regnum == -1 || regnum == AMD64_RSP_REGNUM) | |
273 | { | |
274 | int offset; | |
275 | ||
276 | /* Fetch stack pointer from thread structure. */ | |
e17a4113 | 277 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
278 | |
279 | /* Adjust the stack pointer such that it looks as if we just | |
280 | returned from _thread_machdep_switch. */ | |
281 | offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8; | |
e17a4113 | 282 | store_unsigned_integer (buf, 8, byte_order, sp + offset); |
d78749b4 MK |
283 | regcache_raw_supply (regcache, AMD64_RSP_REGNUM, buf); |
284 | } | |
285 | ||
286 | for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++) | |
287 | { | |
288 | if (amd64obsd_uthread_reg_offset[i] != -1 | |
289 | && (regnum == -1 || regnum == i)) | |
290 | { | |
291 | /* Fetch stack pointer from thread structure (if we didn't | |
292 | do so already). */ | |
293 | if (sp == 0) | |
e17a4113 | 294 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
295 | |
296 | /* Read the saved register from the stack frame. */ | |
297 | read_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8); | |
298 | regcache_raw_supply (regcache, i, buf); | |
299 | } | |
300 | } | |
301 | } | |
302 | ||
303 | static void | |
304 | amd64obsd_collect_uthread (const struct regcache *regcache, | |
305 | int regnum, CORE_ADDR addr) | |
306 | { | |
e17a4113 UW |
307 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
308 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d78749b4 MK |
309 | CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET; |
310 | CORE_ADDR sp = 0; | |
311 | gdb_byte buf[8]; | |
312 | int i; | |
313 | ||
314 | gdb_assert (regnum >= -1); | |
315 | ||
316 | if (regnum == -1 || regnum == AMD64_RSP_REGNUM) | |
317 | { | |
318 | int offset; | |
319 | ||
320 | /* Calculate the stack pointer (frame pointer) that will be | |
321 | stored into the thread structure. */ | |
322 | offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8; | |
323 | regcache_raw_collect (regcache, AMD64_RSP_REGNUM, buf); | |
e17a4113 | 324 | sp = extract_unsigned_integer (buf, 8, byte_order) - offset; |
d78749b4 MK |
325 | |
326 | /* Store the stack pointer. */ | |
e17a4113 | 327 | write_memory_unsigned_integer (sp_addr, 8, byte_order, sp); |
d78749b4 MK |
328 | |
329 | /* The stack pointer was (potentially) modified. Make sure we | |
330 | build a proper stack frame. */ | |
331 | regnum = -1; | |
332 | } | |
333 | ||
334 | for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++) | |
335 | { | |
336 | if (amd64obsd_uthread_reg_offset[i] != -1 | |
337 | && (regnum == -1 || regnum == i)) | |
338 | { | |
339 | /* Fetch stack pointer from thread structure (if we didn't | |
340 | calculate it already). */ | |
341 | if (sp == 0) | |
e17a4113 | 342 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
343 | |
344 | /* Write the register into the stack frame. */ | |
345 | regcache_raw_collect (regcache, i, buf); | |
346 | write_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8); | |
347 | } | |
348 | } | |
349 | } | |
f6acec62 MK |
350 | /* Kernel debugging support. */ |
351 | ||
352 | /* From <machine/frame.h>. Easy since `struct trapframe' matches | |
353 | `struct sigcontext'. */ | |
354 | #define amd64obsd_tf_reg_offset amd64obsd_sc_reg_offset | |
355 | ||
356 | static struct trad_frame_cache * | |
10458914 | 357 | amd64obsd_trapframe_cache (struct frame_info *this_frame, void **this_cache) |
f6acec62 | 358 | { |
e17a4113 UW |
359 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
360 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
f6acec62 MK |
361 | struct trad_frame_cache *cache; |
362 | CORE_ADDR func, sp, addr; | |
363 | ULONGEST cs; | |
2c02bd72 | 364 | const char *name; |
f6acec62 MK |
365 | int i; |
366 | ||
367 | if (*this_cache) | |
368 | return *this_cache; | |
369 | ||
10458914 | 370 | cache = trad_frame_cache_zalloc (this_frame); |
f6acec62 MK |
371 | *this_cache = cache; |
372 | ||
10458914 DJ |
373 | func = get_frame_func (this_frame); |
374 | sp = get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM); | |
f6acec62 MK |
375 | |
376 | find_pc_partial_function (func, &name, NULL, NULL); | |
6d566cff | 377 | if (name && strncmp (name, "Xintr", 5) == 0) |
f6acec62 MK |
378 | addr = sp + 8; /* It's an interrupt frame. */ |
379 | else | |
380 | addr = sp; | |
381 | ||
382 | for (i = 0; i < ARRAY_SIZE (amd64obsd_tf_reg_offset); i++) | |
383 | if (amd64obsd_tf_reg_offset[i] != -1) | |
384 | trad_frame_set_reg_addr (cache, i, addr + amd64obsd_tf_reg_offset[i]); | |
385 | ||
386 | /* Read %cs from trap frame. */ | |
7238f002 | 387 | addr += amd64obsd_tf_reg_offset[AMD64_CS_REGNUM]; |
e17a4113 | 388 | cs = read_memory_unsigned_integer (addr, 8, byte_order); |
f6acec62 MK |
389 | if ((cs & I386_SEL_RPL) == I386_SEL_UPL) |
390 | { | |
6d566cff | 391 | /* Trap from user space; terminate backtrace. */ |
005ca36a | 392 | trad_frame_set_id (cache, outer_frame_id); |
f6acec62 MK |
393 | } |
394 | else | |
395 | { | |
396 | /* Construct the frame ID using the function start. */ | |
397 | trad_frame_set_id (cache, frame_id_build (sp + 16, func)); | |
398 | } | |
399 | ||
400 | return cache; | |
401 | } | |
402 | ||
403 | static void | |
10458914 | 404 | amd64obsd_trapframe_this_id (struct frame_info *this_frame, |
f6acec62 MK |
405 | void **this_cache, struct frame_id *this_id) |
406 | { | |
407 | struct trad_frame_cache *cache = | |
10458914 | 408 | amd64obsd_trapframe_cache (this_frame, this_cache); |
f6acec62 MK |
409 | |
410 | trad_frame_get_id (cache, this_id); | |
411 | } | |
412 | ||
10458914 DJ |
413 | static struct value * |
414 | amd64obsd_trapframe_prev_register (struct frame_info *this_frame, | |
415 | void **this_cache, int regnum) | |
f6acec62 MK |
416 | { |
417 | struct trad_frame_cache *cache = | |
10458914 | 418 | amd64obsd_trapframe_cache (this_frame, this_cache); |
f6acec62 | 419 | |
10458914 | 420 | return trad_frame_get_register (cache, this_frame, regnum); |
f6acec62 MK |
421 | } |
422 | ||
423 | static int | |
424 | amd64obsd_trapframe_sniffer (const struct frame_unwind *self, | |
10458914 | 425 | struct frame_info *this_frame, |
f6acec62 MK |
426 | void **this_prologue_cache) |
427 | { | |
428 | ULONGEST cs; | |
2c02bd72 | 429 | const char *name; |
f6acec62 | 430 | |
e5cc6d11 | 431 | /* Check Current Privilege Level and bail out if we're not executing |
6d566cff | 432 | in kernel space. */ |
10458914 | 433 | cs = get_frame_register_unsigned (this_frame, AMD64_CS_REGNUM); |
f6acec62 MK |
434 | if ((cs & I386_SEL_RPL) == I386_SEL_UPL) |
435 | return 0; | |
436 | ||
10458914 | 437 | find_pc_partial_function (get_frame_pc (this_frame), &name, NULL, NULL); |
f6acec62 MK |
438 | return (name && ((strcmp (name, "calltrap") == 0) |
439 | || (strcmp (name, "osyscall1") == 0) | |
440 | || (strcmp (name, "Xsyscall") == 0) | |
441 | || (strncmp (name, "Xintr", 5) == 0))); | |
442 | } | |
443 | ||
444 | static const struct frame_unwind amd64obsd_trapframe_unwind = { | |
445 | /* FIXME: kettenis/20051219: This really is more like an interrupt | |
446 | frame, but SIGTRAMP_FRAME would print <signal handler called>, | |
447 | which really is not what we want here. */ | |
448 | NORMAL_FRAME, | |
8fbca658 | 449 | default_frame_unwind_stop_reason, |
f6acec62 MK |
450 | amd64obsd_trapframe_this_id, |
451 | amd64obsd_trapframe_prev_register, | |
452 | NULL, | |
453 | amd64obsd_trapframe_sniffer | |
454 | }; | |
455 | \f | |
d78749b4 | 456 | |
e2879ccb MK |
457 | static void |
458 | amd64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
459 | { | |
460 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
461 | ||
90f90721 | 462 | amd64_init_abi (info, gdbarch); |
93ffa5b9 | 463 | obsd_init_abi (info, gdbarch); |
e2879ccb | 464 | |
30b344b1 MK |
465 | /* Initialize general-purpose register set details. */ |
466 | tdep->gregset_reg_offset = amd64obsd_r_reg_offset; | |
467 | tdep->gregset_num_regs = ARRAY_SIZE (amd64obsd_r_reg_offset); | |
468 | tdep->sizeof_gregset = 24 * 8; | |
469 | ||
e2879ccb MK |
470 | tdep->jb_pc_offset = 7 * 8; |
471 | ||
911bc6ee | 472 | tdep->sigtramp_p = amd64obsd_sigtramp_p; |
e2879ccb MK |
473 | tdep->sigcontext_addr = amd64obsd_sigcontext_addr; |
474 | tdep->sc_reg_offset = amd64obsd_sc_reg_offset; | |
475 | tdep->sc_num_regs = ARRAY_SIZE (amd64obsd_sc_reg_offset); | |
7e654c37 | 476 | |
d78749b4 MK |
477 | /* OpenBSD provides a user-level threads implementation. */ |
478 | bsd_uthread_set_supply_uthread (gdbarch, amd64obsd_supply_uthread); | |
479 | bsd_uthread_set_collect_uthread (gdbarch, amd64obsd_collect_uthread); | |
480 | ||
7e654c37 MK |
481 | /* OpenBSD uses SVR4-style shared libraries. */ |
482 | set_solib_svr4_fetch_link_map_offsets | |
483 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
f6acec62 MK |
484 | |
485 | /* Unwind kernel trap frames correctly. */ | |
486 | frame_unwind_prepend_unwinder (gdbarch, &amd64obsd_trapframe_unwind); | |
e2879ccb | 487 | } |
a3e3e961 MK |
488 | |
489 | /* Traditional (a.out) NetBSD-style core dumps. */ | |
490 | ||
491 | static void | |
492 | amd64obsd_core_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
493 | { | |
494 | amd64obsd_init_abi (info, gdbarch); | |
495 | ||
496 | set_gdbarch_regset_from_core_section | |
497 | (gdbarch, amd64obsd_regset_from_core_section); | |
498 | } | |
e2879ccb MK |
499 | \f |
500 | ||
501 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
502 | void _initialize_amd64obsd_tdep (void); | |
503 | ||
504 | void | |
30b344b1 | 505 | _initialize_amd64obsd_tdep (void) |
e2879ccb MK |
506 | { |
507 | /* The OpenBSD/amd64 native dependent code makes this assumption. */ | |
90f90721 | 508 | gdb_assert (ARRAY_SIZE (amd64obsd_r_reg_offset) == AMD64_NUM_GREGS); |
e2879ccb MK |
509 | |
510 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
511 | GDB_OSABI_OPENBSD_ELF, amd64obsd_init_abi); | |
30b344b1 MK |
512 | |
513 | /* OpenBSD uses traditional (a.out) NetBSD-style core dumps. */ | |
514 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
a3e3e961 | 515 | GDB_OSABI_NETBSD_AOUT, amd64obsd_core_init_abi); |
e2879ccb | 516 | } |