Commit | Line | Data |
---|---|---|
387360da JB |
1 | /* Target-dependent code for FreeBSD/mips. |
2 | ||
3 | Copyright (C) 2017 Free Software Foundation, Inc. | |
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 | |
9 | the Free Software Foundation; either version 3 of the License, or | |
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 | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "osabi.h" | |
22 | #include "regset.h" | |
23 | #include "trad-frame.h" | |
24 | #include "tramp-frame.h" | |
25 | ||
26 | #include "fbsd-tdep.h" | |
27 | #include "mips-tdep.h" | |
28 | #include "mips-fbsd-tdep.h" | |
29 | ||
30 | #include "solib-svr4.h" | |
31 | ||
387360da JB |
32 | /* Core file support. */ |
33 | ||
34 | /* Number of registers in `struct reg' from <machine/reg.h>. The | |
35 | first 38 follow the standard MIPS layout. The 39th holds | |
36 | IC_INT_REG on RM7K and RM9K processors. The 40th is a dummy for | |
37 | padding. */ | |
38 | #define MIPS_FBSD_NUM_GREGS 40 | |
39 | ||
40 | /* Number of registers in `struct fpreg' from <machine/reg.h>. The | |
41 | first 32 hold floating point registers. 33 holds the FSR. The | |
42 | 34th is a dummy for padding. */ | |
43 | #define MIPS_FBSD_NUM_FPREGS 34 | |
44 | ||
b057297a AH |
45 | /* Supply a single register. The register size might not match, so use |
46 | regcache->raw_supply_integer (). */ | |
387360da JB |
47 | |
48 | static void | |
49 | mips_fbsd_supply_reg (struct regcache *regcache, int regnum, const void *addr, | |
50 | size_t len) | |
51 | { | |
b057297a | 52 | regcache->raw_supply_integer (regnum, (const gdb_byte *) addr, len, true); |
387360da JB |
53 | } |
54 | ||
b057297a AH |
55 | /* Collect a single register. The register size might not match, so use |
56 | regcache->raw_collect_integer (). */ | |
387360da JB |
57 | |
58 | static void | |
59 | mips_fbsd_collect_reg (const struct regcache *regcache, int regnum, void *addr, | |
60 | size_t len) | |
61 | { | |
b057297a | 62 | regcache->raw_collect_integer (regnum, (gdb_byte *) addr, len, true); |
387360da JB |
63 | } |
64 | ||
65 | /* Supply the floating-point registers stored in FPREGS to REGCACHE. | |
66 | Each floating-point register in FPREGS is REGSIZE bytes in | |
67 | length. */ | |
68 | ||
69 | void | |
70 | mips_fbsd_supply_fpregs (struct regcache *regcache, int regnum, | |
71 | const void *fpregs, size_t regsize) | |
72 | { | |
f7241d4f | 73 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
387360da | 74 | const gdb_byte *regs = (const gdb_byte *) fpregs; |
f7241d4f | 75 | int i, fp0num, fsrnum; |
387360da | 76 | |
f7241d4f JB |
77 | fp0num = mips_regnum (gdbarch)->fp0; |
78 | fsrnum = mips_regnum (gdbarch)->fp_control_status; | |
79 | for (i = fp0num; i <= fsrnum; i++) | |
387360da JB |
80 | if (regnum == i || regnum == -1) |
81 | mips_fbsd_supply_reg (regcache, i, | |
f7241d4f | 82 | regs + (i - fp0num) * regsize, regsize); |
387360da JB |
83 | } |
84 | ||
85 | /* Supply the general-purpose registers stored in GREGS to REGCACHE. | |
86 | Each general-purpose register in GREGS is REGSIZE bytes in | |
87 | length. */ | |
88 | ||
89 | void | |
90 | mips_fbsd_supply_gregs (struct regcache *regcache, int regnum, | |
91 | const void *gregs, size_t regsize) | |
92 | { | |
f7241d4f | 93 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
387360da JB |
94 | const gdb_byte *regs = (const gdb_byte *) gregs; |
95 | int i; | |
96 | ||
f7241d4f | 97 | for (i = 0; i <= mips_regnum (gdbarch)->pc; i++) |
387360da JB |
98 | if (regnum == i || regnum == -1) |
99 | mips_fbsd_supply_reg (regcache, i, regs + i * regsize, regsize); | |
100 | } | |
101 | ||
102 | /* Collect the floating-point registers from REGCACHE and store them | |
103 | in FPREGS. Each floating-point register in FPREGS is REGSIZE bytes | |
104 | in length. */ | |
105 | ||
106 | void | |
107 | mips_fbsd_collect_fpregs (const struct regcache *regcache, int regnum, | |
108 | void *fpregs, size_t regsize) | |
109 | { | |
f7241d4f | 110 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
387360da | 111 | gdb_byte *regs = (gdb_byte *) fpregs; |
f7241d4f | 112 | int i, fp0num, fsrnum; |
387360da | 113 | |
f7241d4f JB |
114 | fp0num = mips_regnum (gdbarch)->fp0; |
115 | fsrnum = mips_regnum (gdbarch)->fp_control_status; | |
116 | for (i = fp0num; i <= fsrnum; i++) | |
387360da JB |
117 | if (regnum == i || regnum == -1) |
118 | mips_fbsd_collect_reg (regcache, i, | |
f7241d4f | 119 | regs + (i - fp0num) * regsize, regsize); |
387360da JB |
120 | } |
121 | ||
122 | /* Collect the general-purpose registers from REGCACHE and store them | |
123 | in GREGS. Each general-purpose register in GREGS is REGSIZE bytes | |
124 | in length. */ | |
125 | ||
126 | void | |
127 | mips_fbsd_collect_gregs (const struct regcache *regcache, int regnum, | |
128 | void *gregs, size_t regsize) | |
129 | { | |
f7241d4f | 130 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
387360da JB |
131 | gdb_byte *regs = (gdb_byte *) gregs; |
132 | int i; | |
133 | ||
f7241d4f | 134 | for (i = 0; i <= mips_regnum (gdbarch)->pc; i++) |
387360da JB |
135 | if (regnum == i || regnum == -1) |
136 | mips_fbsd_collect_reg (regcache, i, regs + i * regsize, regsize); | |
137 | } | |
138 | ||
139 | /* Supply register REGNUM from the buffer specified by FPREGS and LEN | |
140 | in the floating-point register set REGSET to register cache | |
141 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
142 | ||
143 | static void | |
144 | mips_fbsd_supply_fpregset (const struct regset *regset, | |
145 | struct regcache *regcache, | |
146 | int regnum, const void *fpregs, size_t len) | |
147 | { | |
148 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
149 | ||
150 | gdb_assert (len >= MIPS_FBSD_NUM_FPREGS * regsize); | |
151 | ||
152 | mips_fbsd_supply_fpregs (regcache, regnum, fpregs, regsize); | |
153 | } | |
154 | ||
155 | /* Collect register REGNUM from the register cache REGCACHE and store | |
156 | it in the buffer specified by FPREGS and LEN in the floating-point | |
157 | register set REGSET. If REGNUM is -1, do this for all registers in | |
158 | REGSET. */ | |
159 | ||
160 | static void | |
161 | mips_fbsd_collect_fpregset (const struct regset *regset, | |
162 | const struct regcache *regcache, | |
163 | int regnum, void *fpregs, size_t len) | |
164 | { | |
165 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
166 | ||
167 | gdb_assert (len >= MIPS_FBSD_NUM_FPREGS * regsize); | |
168 | ||
169 | mips_fbsd_collect_fpregs (regcache, regnum, fpregs, regsize); | |
170 | } | |
171 | ||
172 | /* Supply register REGNUM from the buffer specified by GREGS and LEN | |
173 | in the general-purpose register set REGSET to register cache | |
174 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
175 | ||
176 | static void | |
177 | mips_fbsd_supply_gregset (const struct regset *regset, | |
178 | struct regcache *regcache, int regnum, | |
179 | const void *gregs, size_t len) | |
180 | { | |
181 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
182 | ||
183 | gdb_assert (len >= MIPS_FBSD_NUM_GREGS * regsize); | |
184 | ||
185 | mips_fbsd_supply_gregs (regcache, regnum, gregs, regsize); | |
186 | } | |
187 | ||
188 | /* Collect register REGNUM from the register cache REGCACHE and store | |
189 | it in the buffer specified by GREGS and LEN in the general-purpose | |
190 | register set REGSET. If REGNUM is -1, do this for all registers in | |
191 | REGSET. */ | |
192 | ||
193 | static void | |
194 | mips_fbsd_collect_gregset (const struct regset *regset, | |
195 | const struct regcache *regcache, | |
196 | int regnum, void *gregs, size_t len) | |
197 | { | |
198 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
199 | ||
200 | gdb_assert (len >= MIPS_FBSD_NUM_GREGS * regsize); | |
201 | ||
202 | mips_fbsd_collect_gregs (regcache, regnum, gregs, regsize); | |
203 | } | |
204 | ||
205 | /* FreeBSD/mips register sets. */ | |
206 | ||
207 | static const struct regset mips_fbsd_gregset = | |
208 | { | |
209 | NULL, | |
210 | mips_fbsd_supply_gregset, | |
211 | mips_fbsd_collect_gregset, | |
212 | }; | |
213 | ||
214 | static const struct regset mips_fbsd_fpregset = | |
215 | { | |
216 | NULL, | |
217 | mips_fbsd_supply_fpregset, | |
218 | mips_fbsd_collect_fpregset, | |
219 | }; | |
220 | ||
221 | /* Iterate over core file register note sections. */ | |
222 | ||
223 | static void | |
224 | mips_fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch, | |
225 | iterate_over_regset_sections_cb *cb, | |
226 | void *cb_data, | |
227 | const struct regcache *regcache) | |
228 | { | |
229 | size_t regsize = mips_abi_regsize (gdbarch); | |
230 | ||
231 | cb (".reg", MIPS_FBSD_NUM_GREGS * regsize, &mips_fbsd_gregset, | |
232 | NULL, cb_data); | |
233 | cb (".reg2", MIPS_FBSD_NUM_FPREGS * regsize, &mips_fbsd_fpregset, | |
234 | NULL, cb_data); | |
235 | } | |
236 | ||
237 | /* Signal trampoline support. */ | |
238 | ||
239 | #define FBSD_SYS_sigreturn 417 | |
240 | ||
241 | #define MIPS_INST_LI_V0_SIGRETURN 0x24020000 + FBSD_SYS_sigreturn | |
242 | #define MIPS_INST_SYSCALL 0x0000000c | |
243 | #define MIPS_INST_BREAK 0x0000000d | |
244 | ||
245 | #define O32_SIGFRAME_UCONTEXT_OFFSET (16) | |
246 | #define O32_SIGSET_T_SIZE (16) | |
247 | ||
248 | #define O32_UCONTEXT_ONSTACK (O32_SIGSET_T_SIZE) | |
249 | #define O32_UCONTEXT_PC (O32_UCONTEXT_ONSTACK + 4) | |
250 | #define O32_UCONTEXT_REGS (O32_UCONTEXT_PC + 4) | |
251 | #define O32_UCONTEXT_SR (O32_UCONTEXT_REGS + 4 * 32) | |
252 | #define O32_UCONTEXT_LO (O32_UCONTEXT_SR + 4) | |
253 | #define O32_UCONTEXT_HI (O32_UCONTEXT_LO + 4) | |
254 | #define O32_UCONTEXT_FPUSED (O32_UCONTEXT_HI + 4) | |
255 | #define O32_UCONTEXT_FPREGS (O32_UCONTEXT_FPUSED + 4) | |
256 | ||
257 | #define O32_UCONTEXT_REG_SIZE 4 | |
258 | ||
259 | static void | |
260 | mips_fbsd_sigframe_init (const struct tramp_frame *self, | |
261 | struct frame_info *this_frame, | |
262 | struct trad_frame_cache *cache, | |
263 | CORE_ADDR func) | |
264 | { | |
265 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
266 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
267 | CORE_ADDR sp, ucontext_addr, addr; | |
268 | int regnum; | |
269 | gdb_byte buf[4]; | |
270 | ||
271 | /* We find the appropriate instance of `ucontext_t' at a | |
272 | fixed offset in the signal frame. */ | |
273 | sp = get_frame_register_signed (this_frame, | |
274 | MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch)); | |
275 | ucontext_addr = sp + O32_SIGFRAME_UCONTEXT_OFFSET; | |
276 | ||
277 | /* PC. */ | |
278 | regnum = mips_regnum (gdbarch)->pc; | |
279 | trad_frame_set_reg_addr (cache, | |
280 | regnum + gdbarch_num_regs (gdbarch), | |
281 | ucontext_addr + O32_UCONTEXT_PC); | |
282 | ||
283 | /* GPRs. */ | |
284 | for (regnum = MIPS_ZERO_REGNUM, addr = ucontext_addr + O32_UCONTEXT_REGS; | |
285 | regnum <= MIPS_RA_REGNUM; regnum++, addr += O32_UCONTEXT_REG_SIZE) | |
286 | trad_frame_set_reg_addr (cache, | |
287 | regnum + gdbarch_num_regs (gdbarch), | |
288 | addr); | |
289 | ||
290 | regnum = MIPS_PS_REGNUM; | |
291 | trad_frame_set_reg_addr (cache, | |
292 | regnum + gdbarch_num_regs (gdbarch), | |
293 | ucontext_addr + O32_UCONTEXT_SR); | |
294 | ||
295 | /* HI and LO. */ | |
296 | regnum = mips_regnum (gdbarch)->lo; | |
297 | trad_frame_set_reg_addr (cache, | |
298 | regnum + gdbarch_num_regs (gdbarch), | |
299 | ucontext_addr + O32_UCONTEXT_LO); | |
300 | regnum = mips_regnum (gdbarch)->hi; | |
301 | trad_frame_set_reg_addr (cache, | |
302 | regnum + gdbarch_num_regs (gdbarch), | |
303 | ucontext_addr + O32_UCONTEXT_HI); | |
304 | ||
1c33cd7f YQ |
305 | if (target_read_memory (ucontext_addr + O32_UCONTEXT_FPUSED, buf, 4) == 0 |
306 | && extract_unsigned_integer (buf, 4, byte_order) != 0) | |
387360da JB |
307 | { |
308 | for (regnum = 0, addr = ucontext_addr + O32_UCONTEXT_FPREGS; | |
309 | regnum < 32; regnum++, addr += O32_UCONTEXT_REG_SIZE) | |
310 | trad_frame_set_reg_addr (cache, | |
311 | regnum + gdbarch_fp0_regnum (gdbarch), | |
312 | addr); | |
313 | trad_frame_set_reg_addr (cache, mips_regnum (gdbarch)->fp_control_status, | |
314 | addr); | |
315 | } | |
316 | ||
317 | trad_frame_set_id (cache, frame_id_build (sp, func)); | |
318 | } | |
319 | ||
320 | #define MIPS_INST_ADDIU_A0_SP_O32 (0x27a40000 \ | |
321 | + O32_SIGFRAME_UCONTEXT_OFFSET) | |
322 | ||
323 | static const struct tramp_frame mips_fbsd_sigframe = | |
324 | { | |
325 | SIGTRAMP_FRAME, | |
326 | MIPS_INSN32_SIZE, | |
327 | { | |
328 | { MIPS_INST_ADDIU_A0_SP_O32, -1 }, /* addiu a0, sp, SIGF_UC */ | |
329 | { MIPS_INST_LI_V0_SIGRETURN, -1 }, /* li v0, SYS_sigreturn */ | |
330 | { MIPS_INST_SYSCALL, -1 }, /* syscall */ | |
331 | { MIPS_INST_BREAK, -1 }, /* break */ | |
332 | { TRAMP_SENTINEL_INSN, -1 } | |
333 | }, | |
334 | mips_fbsd_sigframe_init | |
335 | }; | |
336 | ||
337 | #define N64_SIGFRAME_UCONTEXT_OFFSET (32) | |
338 | #define N64_SIGSET_T_SIZE (16) | |
339 | ||
340 | #define N64_UCONTEXT_ONSTACK (N64_SIGSET_T_SIZE) | |
341 | #define N64_UCONTEXT_PC (N64_UCONTEXT_ONSTACK + 8) | |
342 | #define N64_UCONTEXT_REGS (N64_UCONTEXT_PC + 8) | |
343 | #define N64_UCONTEXT_SR (N64_UCONTEXT_REGS + 8 * 32) | |
344 | #define N64_UCONTEXT_LO (N64_UCONTEXT_SR + 8) | |
345 | #define N64_UCONTEXT_HI (N64_UCONTEXT_LO + 8) | |
346 | #define N64_UCONTEXT_FPUSED (N64_UCONTEXT_HI + 8) | |
347 | #define N64_UCONTEXT_FPREGS (N64_UCONTEXT_FPUSED + 8) | |
348 | ||
349 | #define N64_UCONTEXT_REG_SIZE 8 | |
350 | ||
351 | static void | |
352 | mips64_fbsd_sigframe_init (const struct tramp_frame *self, | |
353 | struct frame_info *this_frame, | |
354 | struct trad_frame_cache *cache, | |
355 | CORE_ADDR func) | |
356 | { | |
357 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
358 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
359 | CORE_ADDR sp, ucontext_addr, addr; | |
360 | int regnum; | |
361 | gdb_byte buf[4]; | |
362 | ||
363 | /* We find the appropriate instance of `ucontext_t' at a | |
364 | fixed offset in the signal frame. */ | |
365 | sp = get_frame_register_signed (this_frame, | |
366 | MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch)); | |
367 | ucontext_addr = sp + N64_SIGFRAME_UCONTEXT_OFFSET; | |
368 | ||
369 | /* PC. */ | |
370 | regnum = mips_regnum (gdbarch)->pc; | |
371 | trad_frame_set_reg_addr (cache, | |
372 | regnum + gdbarch_num_regs (gdbarch), | |
373 | ucontext_addr + N64_UCONTEXT_PC); | |
374 | ||
375 | /* GPRs. */ | |
376 | for (regnum = MIPS_ZERO_REGNUM, addr = ucontext_addr + N64_UCONTEXT_REGS; | |
377 | regnum <= MIPS_RA_REGNUM; regnum++, addr += N64_UCONTEXT_REG_SIZE) | |
378 | trad_frame_set_reg_addr (cache, | |
379 | regnum + gdbarch_num_regs (gdbarch), | |
380 | addr); | |
381 | ||
382 | regnum = MIPS_PS_REGNUM; | |
383 | trad_frame_set_reg_addr (cache, | |
384 | regnum + gdbarch_num_regs (gdbarch), | |
385 | ucontext_addr + N64_UCONTEXT_SR); | |
386 | ||
387 | /* HI and LO. */ | |
388 | regnum = mips_regnum (gdbarch)->lo; | |
389 | trad_frame_set_reg_addr (cache, | |
390 | regnum + gdbarch_num_regs (gdbarch), | |
391 | ucontext_addr + N64_UCONTEXT_LO); | |
392 | regnum = mips_regnum (gdbarch)->hi; | |
393 | trad_frame_set_reg_addr (cache, | |
394 | regnum + gdbarch_num_regs (gdbarch), | |
395 | ucontext_addr + N64_UCONTEXT_HI); | |
396 | ||
1c33cd7f YQ |
397 | if (target_read_memory (ucontext_addr + N64_UCONTEXT_FPUSED, buf, 4) == 0 |
398 | && extract_unsigned_integer (buf, 4, byte_order) != 0) | |
387360da JB |
399 | { |
400 | for (regnum = 0, addr = ucontext_addr + N64_UCONTEXT_FPREGS; | |
401 | regnum < 32; regnum++, addr += N64_UCONTEXT_REG_SIZE) | |
402 | trad_frame_set_reg_addr (cache, | |
403 | regnum + gdbarch_fp0_regnum (gdbarch), | |
404 | addr); | |
405 | trad_frame_set_reg_addr (cache, mips_regnum (gdbarch)->fp_control_status, | |
406 | addr); | |
407 | } | |
408 | ||
409 | trad_frame_set_id (cache, frame_id_build (sp, func)); | |
410 | } | |
411 | ||
412 | #define MIPS_INST_DADDIU_A0_SP_N64 (0x67a40000 \ | |
413 | + N64_SIGFRAME_UCONTEXT_OFFSET) | |
414 | ||
415 | static const struct tramp_frame mips64_fbsd_sigframe = | |
416 | { | |
417 | SIGTRAMP_FRAME, | |
418 | MIPS_INSN32_SIZE, | |
419 | { | |
420 | { MIPS_INST_DADDIU_A0_SP_N64, -1 }, /* daddiu a0, sp, SIGF_UC */ | |
421 | { MIPS_INST_LI_V0_SIGRETURN, -1 }, /* li v0, SYS_sigreturn */ | |
422 | { MIPS_INST_SYSCALL, -1 }, /* syscall */ | |
423 | { MIPS_INST_BREAK, -1 }, /* break */ | |
424 | { TRAMP_SENTINEL_INSN, -1 } | |
425 | }, | |
426 | mips64_fbsd_sigframe_init | |
427 | }; | |
428 | ||
429 | /* Shared library support. */ | |
430 | ||
431 | /* FreeBSD/mips uses a slightly different `struct link_map' than the | |
432 | other FreeBSD platforms as it includes an additional `l_off' | |
433 | member. */ | |
434 | ||
435 | static struct link_map_offsets * | |
436 | mips_fbsd_ilp32_fetch_link_map_offsets (void) | |
437 | { | |
438 | static struct link_map_offsets lmo; | |
439 | static struct link_map_offsets *lmp = NULL; | |
440 | ||
441 | if (lmp == NULL) | |
442 | { | |
443 | lmp = &lmo; | |
444 | ||
445 | lmo.r_version_offset = 0; | |
446 | lmo.r_version_size = 4; | |
447 | lmo.r_map_offset = 4; | |
448 | lmo.r_brk_offset = 8; | |
449 | lmo.r_ldsomap_offset = -1; | |
450 | ||
451 | lmo.link_map_size = 24; | |
452 | lmo.l_addr_offset = 0; | |
453 | lmo.l_name_offset = 8; | |
454 | lmo.l_ld_offset = 12; | |
455 | lmo.l_next_offset = 16; | |
456 | lmo.l_prev_offset = 20; | |
457 | } | |
458 | ||
459 | return lmp; | |
460 | } | |
461 | ||
462 | static struct link_map_offsets * | |
463 | mips_fbsd_lp64_fetch_link_map_offsets (void) | |
464 | { | |
465 | static struct link_map_offsets lmo; | |
466 | static struct link_map_offsets *lmp = NULL; | |
467 | ||
468 | if (lmp == NULL) | |
469 | { | |
470 | lmp = &lmo; | |
471 | ||
472 | lmo.r_version_offset = 0; | |
473 | lmo.r_version_size = 4; | |
474 | lmo.r_map_offset = 8; | |
475 | lmo.r_brk_offset = 16; | |
476 | lmo.r_ldsomap_offset = -1; | |
477 | ||
478 | lmo.link_map_size = 48; | |
479 | lmo.l_addr_offset = 0; | |
480 | lmo.l_name_offset = 16; | |
481 | lmo.l_ld_offset = 24; | |
482 | lmo.l_next_offset = 32; | |
483 | lmo.l_prev_offset = 40; | |
484 | } | |
485 | ||
486 | return lmp; | |
487 | } | |
488 | ||
489 | static void | |
490 | mips_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
491 | { | |
492 | enum mips_abi abi = mips_abi (gdbarch); | |
493 | ||
494 | /* Generic FreeBSD support. */ | |
495 | fbsd_init_abi (info, gdbarch); | |
496 | ||
497 | set_gdbarch_software_single_step (gdbarch, mips_software_single_step); | |
498 | ||
499 | switch (abi) | |
500 | { | |
501 | case MIPS_ABI_O32: | |
502 | tramp_frame_prepend_unwinder (gdbarch, &mips_fbsd_sigframe); | |
503 | break; | |
504 | case MIPS_ABI_N32: | |
505 | break; | |
506 | case MIPS_ABI_N64: | |
507 | tramp_frame_prepend_unwinder (gdbarch, &mips64_fbsd_sigframe); | |
508 | break; | |
509 | } | |
510 | ||
511 | set_gdbarch_iterate_over_regset_sections | |
512 | (gdbarch, mips_fbsd_iterate_over_regset_sections); | |
513 | ||
514 | /* FreeBSD/mips has SVR4-style shared libraries. */ | |
515 | set_solib_svr4_fetch_link_map_offsets | |
516 | (gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ? | |
517 | mips_fbsd_ilp32_fetch_link_map_offsets : | |
518 | mips_fbsd_lp64_fetch_link_map_offsets)); | |
519 | } | |
520 | \f | |
521 | ||
522 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
523 | void _initialize_mips_fbsd_tdep (void); | |
524 | ||
525 | void | |
526 | _initialize_mips_fbsd_tdep (void) | |
527 | { | |
c988ac1d | 528 | gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_FREEBSD, |
387360da JB |
529 | mips_fbsd_init_abi); |
530 | } |