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 | { | |
09424cff AA |
48 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
49 | const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
30b344b1 MK |
50 | |
51 | gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE); | |
52 | ||
53 | i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset); | |
d8de1ef7 MK |
54 | amd64_supply_fxsave (regcache, regnum, |
55 | ((const gdb_byte *)regs) + tdep->sizeof_gregset); | |
30b344b1 MK |
56 | } |
57 | ||
ecc37a5a AA |
58 | static const struct regset amd64obsd_combined_regset = |
59 | { | |
60 | NULL, amd64obsd_supply_regset, NULL | |
61 | }; | |
62 | ||
30b344b1 MK |
63 | static const struct regset * |
64 | amd64obsd_regset_from_core_section (struct gdbarch *gdbarch, | |
65 | const char *sect_name, size_t sect_size) | |
66 | { | |
67 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
68 | ||
69 | /* OpenBSD core dumps don't use seperate register sets for the | |
70 | general-purpose and floating-point registers. */ | |
71 | ||
72 | if (strcmp (sect_name, ".reg") == 0 | |
73 | && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE) | |
ecc37a5a | 74 | return &amd64obsd_combined_regset; |
30b344b1 MK |
75 | |
76 | return NULL; | |
77 | } | |
78 | \f | |
e2879ccb MK |
79 | |
80 | /* Support for signal handlers. */ | |
81 | ||
911bc6ee | 82 | /* Default page size. */ |
e2879ccb MK |
83 | static const int amd64obsd_page_size = 4096; |
84 | ||
10458914 DJ |
85 | /* Return whether THIS_FRAME corresponds to an OpenBSD sigtramp |
86 | routine. */ | |
911bc6ee | 87 | |
e2879ccb | 88 | static int |
10458914 | 89 | amd64obsd_sigtramp_p (struct frame_info *this_frame) |
e2879ccb | 90 | { |
10458914 | 91 | CORE_ADDR pc = get_frame_pc (this_frame); |
e2879ccb | 92 | CORE_ADDR start_pc = (pc & ~(amd64obsd_page_size - 1)); |
0dcddd84 | 93 | const gdb_byte osigreturn[] = |
e2879ccb MK |
94 | { |
95 | 0x48, 0xc7, 0xc0, | |
96 | 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */ | |
84d04465 | 97 | 0xcd, 0x80 /* int $0x80 */ |
e2879ccb | 98 | }; |
0dcddd84 MK |
99 | const gdb_byte sigreturn[] = |
100 | { | |
101 | 0x48, 0xc7, 0xc0, | |
102 | 0x67, 0x00, 0x00, 0x00, /* movq $SYS_sigreturn, %rax */ | |
103 | 0x0f, 0x05 /* syscall */ | |
104 | }; | |
1c5bf419 | 105 | size_t buflen = (sizeof sigreturn) + 1; |
d8de1ef7 | 106 | gdb_byte *buf; |
2c02bd72 | 107 | const char *name; |
911bc6ee MK |
108 | |
109 | /* If the function has a valid symbol name, it isn't a | |
110 | trampoline. */ | |
111 | find_pc_partial_function (pc, &name, NULL, NULL); | |
112 | if (name != NULL) | |
113 | return 0; | |
e2879ccb | 114 | |
911bc6ee MK |
115 | /* If the function lives in a valid section (even without a starting |
116 | point) it isn't a trampoline. */ | |
117 | if (find_pc_section (pc) != NULL) | |
e2879ccb MK |
118 | return 0; |
119 | ||
120 | /* If we can't read the instructions at START_PC, return zero. */ | |
4cd28409 | 121 | buf = alloca ((sizeof sigreturn) + 1); |
10458914 | 122 | if (!safe_frame_unwind_memory (this_frame, start_pc + 6, buf, buflen)) |
e2879ccb MK |
123 | return 0; |
124 | ||
4cd28409 MK |
125 | /* Check for sigreturn(2). Depending on how the assembler encoded |
126 | the `movq %rsp, %rdi' instruction, the code starts at offset 6 or | |
0dcddd84 MK |
127 | 7. OpenBSD 5.0 and later use the `syscall' instruction. Older |
128 | versions use `int $0x80'. Check for both. */ | |
4cd28409 | 129 | if (memcmp (buf, sigreturn, sizeof sigreturn) |
0dcddd84 MK |
130 | && memcmp (buf + 1, sigreturn, sizeof sigreturn) |
131 | && memcmp (buf, osigreturn, sizeof osigreturn) | |
132 | && memcmp (buf + 1, osigreturn, sizeof osigreturn)) | |
e2879ccb MK |
133 | return 0; |
134 | ||
135 | return 1; | |
136 | } | |
137 | ||
10458914 DJ |
138 | /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the |
139 | address of the associated sigcontext structure. */ | |
e2879ccb MK |
140 | |
141 | static CORE_ADDR | |
10458914 | 142 | amd64obsd_sigcontext_addr (struct frame_info *this_frame) |
e2879ccb | 143 | { |
10458914 | 144 | CORE_ADDR pc = get_frame_pc (this_frame); |
0fe85704 MK |
145 | ULONGEST offset = (pc & (amd64obsd_page_size - 1)); |
146 | ||
e2879ccb | 147 | /* The %rsp register points at `struct sigcontext' upon entry of a |
0fe85704 MK |
148 | signal trampoline. The relevant part of the trampoline is |
149 | ||
150 | call *%rax | |
151 | movq %rsp, %rdi | |
152 | pushq %rdi | |
153 | movq $SYS_sigreturn,%rax | |
154 | int $0x80 | |
155 | ||
156 | (see /usr/src/sys/arch/amd64/amd64/locore.S). The `pushq' | |
157 | instruction clobbers %rsp, but its value is saved in `%rdi'. */ | |
158 | ||
4cd28409 | 159 | if (offset > 5) |
10458914 | 160 | return get_frame_register_unsigned (this_frame, AMD64_RDI_REGNUM); |
0fe85704 | 161 | else |
10458914 | 162 | return get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM); |
e2879ccb MK |
163 | } |
164 | \f | |
165 | /* OpenBSD 3.5 or later. */ | |
166 | ||
167 | /* Mapping between the general-purpose registers in `struct reg' | |
168 | format and GDB's register cache layout. */ | |
169 | ||
30b344b1 | 170 | /* From <machine/reg.h>. */ |
e2879ccb MK |
171 | int amd64obsd_r_reg_offset[] = |
172 | { | |
173 | 14 * 8, /* %rax */ | |
174 | 13 * 8, /* %rbx */ | |
175 | 3 * 8, /* %rcx */ | |
176 | 2 * 8, /* %rdx */ | |
177 | 1 * 8, /* %rsi */ | |
178 | 0 * 8, /* %rdi */ | |
179 | 12 * 8, /* %rbp */ | |
180 | 15 * 8, /* %rsp */ | |
0963b4bd | 181 | 4 * 8, /* %r8 .. */ |
e2879ccb MK |
182 | 5 * 8, |
183 | 6 * 8, | |
184 | 7 * 8, | |
185 | 8 * 8, | |
186 | 9 * 8, | |
187 | 10 * 8, | |
188 | 11 * 8, /* ... %r15 */ | |
189 | 16 * 8, /* %rip */ | |
190 | 17 * 8, /* %eflags */ | |
191 | 18 * 8, /* %cs */ | |
192 | 19 * 8, /* %ss */ | |
193 | 20 * 8, /* %ds */ | |
194 | 21 * 8, /* %es */ | |
195 | 22 * 8, /* %fs */ | |
196 | 23 * 8 /* %gs */ | |
197 | }; | |
198 | ||
30b344b1 | 199 | /* From <machine/signal.h>. */ |
e2879ccb MK |
200 | static int amd64obsd_sc_reg_offset[] = |
201 | { | |
202 | 14 * 8, /* %rax */ | |
203 | 13 * 8, /* %rbx */ | |
204 | 3 * 8, /* %rcx */ | |
205 | 2 * 8, /* %rdx */ | |
206 | 1 * 8, /* %rsi */ | |
207 | 0 * 8, /* %rdi */ | |
208 | 12 * 8, /* %rbp */ | |
209 | 24 * 8, /* %rsp */ | |
0963b4bd | 210 | 4 * 8, /* %r8 ... */ |
e2879ccb MK |
211 | 5 * 8, |
212 | 6 * 8, | |
213 | 7 * 8, | |
214 | 8 * 8, | |
215 | 9 * 8, | |
216 | 10 * 8, | |
217 | 11 * 8, /* ... %r15 */ | |
218 | 21 * 8, /* %rip */ | |
219 | 23 * 8, /* %eflags */ | |
220 | 22 * 8, /* %cs */ | |
221 | 25 * 8, /* %ss */ | |
222 | 18 * 8, /* %ds */ | |
223 | 17 * 8, /* %es */ | |
224 | 16 * 8, /* %fs */ | |
225 | 15 * 8 /* %gs */ | |
226 | }; | |
227 | ||
d78749b4 MK |
228 | /* From /usr/src/lib/libpthread/arch/amd64/uthread_machdep.c. */ |
229 | static int amd64obsd_uthread_reg_offset[] = | |
230 | { | |
231 | 19 * 8, /* %rax */ | |
232 | 16 * 8, /* %rbx */ | |
233 | 18 * 8, /* %rcx */ | |
234 | 17 * 8, /* %rdx */ | |
235 | 14 * 8, /* %rsi */ | |
236 | 13 * 8, /* %rdi */ | |
237 | 15 * 8, /* %rbp */ | |
238 | -1, /* %rsp */ | |
0963b4bd | 239 | 12 * 8, /* %r8 ... */ |
d78749b4 MK |
240 | 11 * 8, |
241 | 10 * 8, | |
242 | 9 * 8, | |
243 | 8 * 8, | |
244 | 7 * 8, | |
245 | 6 * 8, | |
246 | 5 * 8, /* ... %r15 */ | |
247 | 20 * 8, /* %rip */ | |
248 | 4 * 8, /* %eflags */ | |
249 | 21 * 8, /* %cs */ | |
250 | -1, /* %ss */ | |
251 | 3 * 8, /* %ds */ | |
252 | 2 * 8, /* %es */ | |
253 | 1 * 8, /* %fs */ | |
254 | 0 * 8 /* %gs */ | |
255 | }; | |
256 | ||
257 | /* Offset within the thread structure where we can find the saved | |
258 | stack pointer (%esp). */ | |
259 | #define AMD64OBSD_UTHREAD_RSP_OFFSET 400 | |
260 | ||
261 | static void | |
262 | amd64obsd_supply_uthread (struct regcache *regcache, | |
263 | int regnum, CORE_ADDR addr) | |
264 | { | |
e17a4113 UW |
265 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
266 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d78749b4 MK |
267 | CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET; |
268 | CORE_ADDR sp = 0; | |
269 | gdb_byte buf[8]; | |
270 | int i; | |
271 | ||
272 | gdb_assert (regnum >= -1); | |
273 | ||
274 | if (regnum == -1 || regnum == AMD64_RSP_REGNUM) | |
275 | { | |
276 | int offset; | |
277 | ||
278 | /* Fetch stack pointer from thread structure. */ | |
e17a4113 | 279 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
280 | |
281 | /* Adjust the stack pointer such that it looks as if we just | |
282 | returned from _thread_machdep_switch. */ | |
283 | offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8; | |
e17a4113 | 284 | store_unsigned_integer (buf, 8, byte_order, sp + offset); |
d78749b4 MK |
285 | regcache_raw_supply (regcache, AMD64_RSP_REGNUM, buf); |
286 | } | |
287 | ||
288 | for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++) | |
289 | { | |
290 | if (amd64obsd_uthread_reg_offset[i] != -1 | |
291 | && (regnum == -1 || regnum == i)) | |
292 | { | |
293 | /* Fetch stack pointer from thread structure (if we didn't | |
294 | do so already). */ | |
295 | if (sp == 0) | |
e17a4113 | 296 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
297 | |
298 | /* Read the saved register from the stack frame. */ | |
299 | read_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8); | |
300 | regcache_raw_supply (regcache, i, buf); | |
301 | } | |
302 | } | |
303 | } | |
304 | ||
305 | static void | |
306 | amd64obsd_collect_uthread (const struct regcache *regcache, | |
307 | int regnum, CORE_ADDR addr) | |
308 | { | |
e17a4113 UW |
309 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
310 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d78749b4 MK |
311 | CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET; |
312 | CORE_ADDR sp = 0; | |
313 | gdb_byte buf[8]; | |
314 | int i; | |
315 | ||
316 | gdb_assert (regnum >= -1); | |
317 | ||
318 | if (regnum == -1 || regnum == AMD64_RSP_REGNUM) | |
319 | { | |
320 | int offset; | |
321 | ||
322 | /* Calculate the stack pointer (frame pointer) that will be | |
323 | stored into the thread structure. */ | |
324 | offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8; | |
325 | regcache_raw_collect (regcache, AMD64_RSP_REGNUM, buf); | |
e17a4113 | 326 | sp = extract_unsigned_integer (buf, 8, byte_order) - offset; |
d78749b4 MK |
327 | |
328 | /* Store the stack pointer. */ | |
e17a4113 | 329 | write_memory_unsigned_integer (sp_addr, 8, byte_order, sp); |
d78749b4 MK |
330 | |
331 | /* The stack pointer was (potentially) modified. Make sure we | |
332 | build a proper stack frame. */ | |
333 | regnum = -1; | |
334 | } | |
335 | ||
336 | for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++) | |
337 | { | |
338 | if (amd64obsd_uthread_reg_offset[i] != -1 | |
339 | && (regnum == -1 || regnum == i)) | |
340 | { | |
341 | /* Fetch stack pointer from thread structure (if we didn't | |
342 | calculate it already). */ | |
343 | if (sp == 0) | |
e17a4113 | 344 | sp = read_memory_unsigned_integer (sp_addr, 8, byte_order); |
d78749b4 MK |
345 | |
346 | /* Write the register into the stack frame. */ | |
347 | regcache_raw_collect (regcache, i, buf); | |
348 | write_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8); | |
349 | } | |
350 | } | |
351 | } | |
f6acec62 MK |
352 | /* Kernel debugging support. */ |
353 | ||
354 | /* From <machine/frame.h>. Easy since `struct trapframe' matches | |
355 | `struct sigcontext'. */ | |
356 | #define amd64obsd_tf_reg_offset amd64obsd_sc_reg_offset | |
357 | ||
358 | static struct trad_frame_cache * | |
10458914 | 359 | amd64obsd_trapframe_cache (struct frame_info *this_frame, void **this_cache) |
f6acec62 | 360 | { |
e17a4113 UW |
361 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
362 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
f6acec62 MK |
363 | struct trad_frame_cache *cache; |
364 | CORE_ADDR func, sp, addr; | |
365 | ULONGEST cs; | |
2c02bd72 | 366 | const char *name; |
f6acec62 MK |
367 | int i; |
368 | ||
369 | if (*this_cache) | |
370 | return *this_cache; | |
371 | ||
10458914 | 372 | cache = trad_frame_cache_zalloc (this_frame); |
f6acec62 MK |
373 | *this_cache = cache; |
374 | ||
10458914 DJ |
375 | func = get_frame_func (this_frame); |
376 | sp = get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM); | |
f6acec62 MK |
377 | |
378 | find_pc_partial_function (func, &name, NULL, NULL); | |
6d566cff | 379 | if (name && strncmp (name, "Xintr", 5) == 0) |
f6acec62 MK |
380 | addr = sp + 8; /* It's an interrupt frame. */ |
381 | else | |
382 | addr = sp; | |
383 | ||
384 | for (i = 0; i < ARRAY_SIZE (amd64obsd_tf_reg_offset); i++) | |
385 | if (amd64obsd_tf_reg_offset[i] != -1) | |
386 | trad_frame_set_reg_addr (cache, i, addr + amd64obsd_tf_reg_offset[i]); | |
387 | ||
388 | /* Read %cs from trap frame. */ | |
7238f002 | 389 | addr += amd64obsd_tf_reg_offset[AMD64_CS_REGNUM]; |
e17a4113 | 390 | cs = read_memory_unsigned_integer (addr, 8, byte_order); |
f6acec62 MK |
391 | if ((cs & I386_SEL_RPL) == I386_SEL_UPL) |
392 | { | |
6d566cff | 393 | /* Trap from user space; terminate backtrace. */ |
005ca36a | 394 | trad_frame_set_id (cache, outer_frame_id); |
f6acec62 MK |
395 | } |
396 | else | |
397 | { | |
398 | /* Construct the frame ID using the function start. */ | |
399 | trad_frame_set_id (cache, frame_id_build (sp + 16, func)); | |
400 | } | |
401 | ||
402 | return cache; | |
403 | } | |
404 | ||
405 | static void | |
10458914 | 406 | amd64obsd_trapframe_this_id (struct frame_info *this_frame, |
f6acec62 MK |
407 | void **this_cache, struct frame_id *this_id) |
408 | { | |
409 | struct trad_frame_cache *cache = | |
10458914 | 410 | amd64obsd_trapframe_cache (this_frame, this_cache); |
f6acec62 MK |
411 | |
412 | trad_frame_get_id (cache, this_id); | |
413 | } | |
414 | ||
10458914 DJ |
415 | static struct value * |
416 | amd64obsd_trapframe_prev_register (struct frame_info *this_frame, | |
417 | void **this_cache, int regnum) | |
f6acec62 MK |
418 | { |
419 | struct trad_frame_cache *cache = | |
10458914 | 420 | amd64obsd_trapframe_cache (this_frame, this_cache); |
f6acec62 | 421 | |
10458914 | 422 | return trad_frame_get_register (cache, this_frame, regnum); |
f6acec62 MK |
423 | } |
424 | ||
425 | static int | |
426 | amd64obsd_trapframe_sniffer (const struct frame_unwind *self, | |
10458914 | 427 | struct frame_info *this_frame, |
f6acec62 MK |
428 | void **this_prologue_cache) |
429 | { | |
430 | ULONGEST cs; | |
2c02bd72 | 431 | const char *name; |
f6acec62 | 432 | |
e5cc6d11 | 433 | /* Check Current Privilege Level and bail out if we're not executing |
6d566cff | 434 | in kernel space. */ |
10458914 | 435 | cs = get_frame_register_unsigned (this_frame, AMD64_CS_REGNUM); |
f6acec62 MK |
436 | if ((cs & I386_SEL_RPL) == I386_SEL_UPL) |
437 | return 0; | |
438 | ||
10458914 | 439 | find_pc_partial_function (get_frame_pc (this_frame), &name, NULL, NULL); |
f6acec62 MK |
440 | return (name && ((strcmp (name, "calltrap") == 0) |
441 | || (strcmp (name, "osyscall1") == 0) | |
442 | || (strcmp (name, "Xsyscall") == 0) | |
443 | || (strncmp (name, "Xintr", 5) == 0))); | |
444 | } | |
445 | ||
446 | static const struct frame_unwind amd64obsd_trapframe_unwind = { | |
447 | /* FIXME: kettenis/20051219: This really is more like an interrupt | |
448 | frame, but SIGTRAMP_FRAME would print <signal handler called>, | |
449 | which really is not what we want here. */ | |
450 | NORMAL_FRAME, | |
8fbca658 | 451 | default_frame_unwind_stop_reason, |
f6acec62 MK |
452 | amd64obsd_trapframe_this_id, |
453 | amd64obsd_trapframe_prev_register, | |
454 | NULL, | |
455 | amd64obsd_trapframe_sniffer | |
456 | }; | |
457 | \f | |
d78749b4 | 458 | |
e2879ccb MK |
459 | static void |
460 | amd64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
461 | { | |
462 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
463 | ||
90f90721 | 464 | amd64_init_abi (info, gdbarch); |
93ffa5b9 | 465 | obsd_init_abi (info, gdbarch); |
e2879ccb | 466 | |
30b344b1 MK |
467 | /* Initialize general-purpose register set details. */ |
468 | tdep->gregset_reg_offset = amd64obsd_r_reg_offset; | |
469 | tdep->gregset_num_regs = ARRAY_SIZE (amd64obsd_r_reg_offset); | |
470 | tdep->sizeof_gregset = 24 * 8; | |
471 | ||
e2879ccb MK |
472 | tdep->jb_pc_offset = 7 * 8; |
473 | ||
911bc6ee | 474 | tdep->sigtramp_p = amd64obsd_sigtramp_p; |
e2879ccb MK |
475 | tdep->sigcontext_addr = amd64obsd_sigcontext_addr; |
476 | tdep->sc_reg_offset = amd64obsd_sc_reg_offset; | |
477 | tdep->sc_num_regs = ARRAY_SIZE (amd64obsd_sc_reg_offset); | |
7e654c37 | 478 | |
d78749b4 MK |
479 | /* OpenBSD provides a user-level threads implementation. */ |
480 | bsd_uthread_set_supply_uthread (gdbarch, amd64obsd_supply_uthread); | |
481 | bsd_uthread_set_collect_uthread (gdbarch, amd64obsd_collect_uthread); | |
482 | ||
7e654c37 MK |
483 | /* OpenBSD uses SVR4-style shared libraries. */ |
484 | set_solib_svr4_fetch_link_map_offsets | |
485 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
f6acec62 MK |
486 | |
487 | /* Unwind kernel trap frames correctly. */ | |
488 | frame_unwind_prepend_unwinder (gdbarch, &amd64obsd_trapframe_unwind); | |
e2879ccb | 489 | } |
a3e3e961 MK |
490 | |
491 | /* Traditional (a.out) NetBSD-style core dumps. */ | |
492 | ||
493 | static void | |
494 | amd64obsd_core_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
495 | { | |
496 | amd64obsd_init_abi (info, gdbarch); | |
497 | ||
498 | set_gdbarch_regset_from_core_section | |
499 | (gdbarch, amd64obsd_regset_from_core_section); | |
500 | } | |
e2879ccb MK |
501 | \f |
502 | ||
503 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
504 | void _initialize_amd64obsd_tdep (void); | |
505 | ||
506 | void | |
30b344b1 | 507 | _initialize_amd64obsd_tdep (void) |
e2879ccb MK |
508 | { |
509 | /* The OpenBSD/amd64 native dependent code makes this assumption. */ | |
90f90721 | 510 | gdb_assert (ARRAY_SIZE (amd64obsd_r_reg_offset) == AMD64_NUM_GREGS); |
e2879ccb MK |
511 | |
512 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
513 | GDB_OSABI_OPENBSD_ELF, amd64obsd_init_abi); | |
30b344b1 MK |
514 | |
515 | /* OpenBSD uses traditional (a.out) NetBSD-style core dumps. */ | |
516 | gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, | |
a3e3e961 | 517 | GDB_OSABI_NETBSD_AOUT, amd64obsd_core_init_abi); |
e2879ccb | 518 | } |