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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 | ||
32 | /* Shorthand for some register numbers used below. */ | |
33 | #define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM | |
34 | #define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM | |
35 | #define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32 | |
36 | ||
37 | /* Core file support. */ | |
38 | ||
39 | /* Number of registers in `struct reg' from <machine/reg.h>. The | |
40 | first 38 follow the standard MIPS layout. The 39th holds | |
41 | IC_INT_REG on RM7K and RM9K processors. The 40th is a dummy for | |
42 | padding. */ | |
43 | #define MIPS_FBSD_NUM_GREGS 40 | |
44 | ||
45 | /* Number of registers in `struct fpreg' from <machine/reg.h>. The | |
46 | first 32 hold floating point registers. 33 holds the FSR. The | |
47 | 34th is a dummy for padding. */ | |
48 | #define MIPS_FBSD_NUM_FPREGS 34 | |
49 | ||
50 | /* Supply a single register. If the source register size matches the | |
51 | size the regcache expects, this can use regcache_raw_supply(). If | |
52 | they are different, this copies the source register into a buffer | |
53 | that can be passed to regcache_raw_supply(). */ | |
54 | ||
55 | static void | |
56 | mips_fbsd_supply_reg (struct regcache *regcache, int regnum, const void *addr, | |
57 | size_t len) | |
58 | { | |
59 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
60 | ||
61 | if (register_size (gdbarch, regnum) == len) | |
62 | regcache_raw_supply (regcache, regnum, addr); | |
63 | else | |
64 | { | |
65 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
66 | gdb_byte buf[MAX_REGISTER_SIZE]; | |
67 | LONGEST val; | |
68 | ||
69 | val = extract_signed_integer ((const gdb_byte *) addr, len, byte_order); | |
70 | store_signed_integer (buf, register_size (gdbarch, regnum), byte_order, | |
71 | val); | |
72 | regcache_raw_supply (regcache, regnum, buf); | |
73 | } | |
74 | } | |
75 | ||
76 | /* Collect a single register. If the destination register size | |
77 | matches the size the regcache expects, this can use | |
78 | regcache_raw_supply(). If they are different, this fetches the | |
79 | register via regcache_raw_supply() into a buffer and then copies it | |
80 | into the final destination. */ | |
81 | ||
82 | static void | |
83 | mips_fbsd_collect_reg (const struct regcache *regcache, int regnum, void *addr, | |
84 | size_t len) | |
85 | { | |
86 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
87 | ||
88 | if (register_size (gdbarch, regnum) == len) | |
89 | regcache_raw_collect (regcache, regnum, addr); | |
90 | else | |
91 | { | |
92 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
93 | gdb_byte buf[MAX_REGISTER_SIZE]; | |
94 | LONGEST val; | |
95 | ||
96 | regcache_raw_collect (regcache, regnum, buf); | |
97 | val = extract_signed_integer (buf, register_size (gdbarch, regnum), | |
98 | byte_order); | |
99 | store_signed_integer ((gdb_byte *) addr, len, byte_order, val); | |
100 | } | |
101 | } | |
102 | ||
103 | /* Supply the floating-point registers stored in FPREGS to REGCACHE. | |
104 | Each floating-point register in FPREGS is REGSIZE bytes in | |
105 | length. */ | |
106 | ||
107 | void | |
108 | mips_fbsd_supply_fpregs (struct regcache *regcache, int regnum, | |
109 | const void *fpregs, size_t regsize) | |
110 | { | |
111 | const gdb_byte *regs = (const gdb_byte *) fpregs; | |
112 | int i; | |
113 | ||
114 | for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++) | |
115 | if (regnum == i || regnum == -1) | |
116 | mips_fbsd_supply_reg (regcache, i, | |
117 | regs + (i - MIPS_FP0_REGNUM) * regsize, regsize); | |
118 | } | |
119 | ||
120 | /* Supply the general-purpose registers stored in GREGS to REGCACHE. | |
121 | Each general-purpose register in GREGS is REGSIZE bytes in | |
122 | length. */ | |
123 | ||
124 | void | |
125 | mips_fbsd_supply_gregs (struct regcache *regcache, int regnum, | |
126 | const void *gregs, size_t regsize) | |
127 | { | |
128 | const gdb_byte *regs = (const gdb_byte *) gregs; | |
129 | int i; | |
130 | ||
131 | for (i = 0; i <= MIPS_PC_REGNUM; i++) | |
132 | if (regnum == i || regnum == -1) | |
133 | mips_fbsd_supply_reg (regcache, i, regs + i * regsize, regsize); | |
134 | } | |
135 | ||
136 | /* Collect the floating-point registers from REGCACHE and store them | |
137 | in FPREGS. Each floating-point register in FPREGS is REGSIZE bytes | |
138 | in length. */ | |
139 | ||
140 | void | |
141 | mips_fbsd_collect_fpregs (const struct regcache *regcache, int regnum, | |
142 | void *fpregs, size_t regsize) | |
143 | { | |
144 | gdb_byte *regs = (gdb_byte *) fpregs; | |
145 | int i; | |
146 | ||
147 | for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++) | |
148 | if (regnum == i || regnum == -1) | |
149 | mips_fbsd_collect_reg (regcache, i, | |
150 | regs + (i - MIPS_FP0_REGNUM) * regsize, regsize); | |
151 | } | |
152 | ||
153 | /* Collect the general-purpose registers from REGCACHE and store them | |
154 | in GREGS. Each general-purpose register in GREGS is REGSIZE bytes | |
155 | in length. */ | |
156 | ||
157 | void | |
158 | mips_fbsd_collect_gregs (const struct regcache *regcache, int regnum, | |
159 | void *gregs, size_t regsize) | |
160 | { | |
161 | gdb_byte *regs = (gdb_byte *) gregs; | |
162 | int i; | |
163 | ||
164 | for (i = 0; i <= MIPS_PC_REGNUM; i++) | |
165 | if (regnum == i || regnum == -1) | |
166 | mips_fbsd_collect_reg (regcache, i, regs + i * regsize, regsize); | |
167 | } | |
168 | ||
169 | /* Supply register REGNUM from the buffer specified by FPREGS and LEN | |
170 | in the floating-point register set REGSET to register cache | |
171 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
172 | ||
173 | static void | |
174 | mips_fbsd_supply_fpregset (const struct regset *regset, | |
175 | struct regcache *regcache, | |
176 | int regnum, const void *fpregs, size_t len) | |
177 | { | |
178 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
179 | ||
180 | gdb_assert (len >= MIPS_FBSD_NUM_FPREGS * regsize); | |
181 | ||
182 | mips_fbsd_supply_fpregs (regcache, regnum, fpregs, regsize); | |
183 | } | |
184 | ||
185 | /* Collect register REGNUM from the register cache REGCACHE and store | |
186 | it in the buffer specified by FPREGS and LEN in the floating-point | |
187 | register set REGSET. If REGNUM is -1, do this for all registers in | |
188 | REGSET. */ | |
189 | ||
190 | static void | |
191 | mips_fbsd_collect_fpregset (const struct regset *regset, | |
192 | const struct regcache *regcache, | |
193 | int regnum, void *fpregs, size_t len) | |
194 | { | |
195 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
196 | ||
197 | gdb_assert (len >= MIPS_FBSD_NUM_FPREGS * regsize); | |
198 | ||
199 | mips_fbsd_collect_fpregs (regcache, regnum, fpregs, regsize); | |
200 | } | |
201 | ||
202 | /* Supply register REGNUM from the buffer specified by GREGS and LEN | |
203 | in the general-purpose register set REGSET to register cache | |
204 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
205 | ||
206 | static void | |
207 | mips_fbsd_supply_gregset (const struct regset *regset, | |
208 | struct regcache *regcache, int regnum, | |
209 | const void *gregs, size_t len) | |
210 | { | |
211 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
212 | ||
213 | gdb_assert (len >= MIPS_FBSD_NUM_GREGS * regsize); | |
214 | ||
215 | mips_fbsd_supply_gregs (regcache, regnum, gregs, regsize); | |
216 | } | |
217 | ||
218 | /* Collect register REGNUM from the register cache REGCACHE and store | |
219 | it in the buffer specified by GREGS and LEN in the general-purpose | |
220 | register set REGSET. If REGNUM is -1, do this for all registers in | |
221 | REGSET. */ | |
222 | ||
223 | static void | |
224 | mips_fbsd_collect_gregset (const struct regset *regset, | |
225 | const struct regcache *regcache, | |
226 | int regnum, void *gregs, size_t len) | |
227 | { | |
228 | size_t regsize = mips_abi_regsize (get_regcache_arch (regcache)); | |
229 | ||
230 | gdb_assert (len >= MIPS_FBSD_NUM_GREGS * regsize); | |
231 | ||
232 | mips_fbsd_collect_gregs (regcache, regnum, gregs, regsize); | |
233 | } | |
234 | ||
235 | /* FreeBSD/mips register sets. */ | |
236 | ||
237 | static const struct regset mips_fbsd_gregset = | |
238 | { | |
239 | NULL, | |
240 | mips_fbsd_supply_gregset, | |
241 | mips_fbsd_collect_gregset, | |
242 | }; | |
243 | ||
244 | static const struct regset mips_fbsd_fpregset = | |
245 | { | |
246 | NULL, | |
247 | mips_fbsd_supply_fpregset, | |
248 | mips_fbsd_collect_fpregset, | |
249 | }; | |
250 | ||
251 | /* Iterate over core file register note sections. */ | |
252 | ||
253 | static void | |
254 | mips_fbsd_iterate_over_regset_sections (struct gdbarch *gdbarch, | |
255 | iterate_over_regset_sections_cb *cb, | |
256 | void *cb_data, | |
257 | const struct regcache *regcache) | |
258 | { | |
259 | size_t regsize = mips_abi_regsize (gdbarch); | |
260 | ||
261 | cb (".reg", MIPS_FBSD_NUM_GREGS * regsize, &mips_fbsd_gregset, | |
262 | NULL, cb_data); | |
263 | cb (".reg2", MIPS_FBSD_NUM_FPREGS * regsize, &mips_fbsd_fpregset, | |
264 | NULL, cb_data); | |
265 | } | |
266 | ||
267 | /* Signal trampoline support. */ | |
268 | ||
269 | #define FBSD_SYS_sigreturn 417 | |
270 | ||
271 | #define MIPS_INST_LI_V0_SIGRETURN 0x24020000 + FBSD_SYS_sigreturn | |
272 | #define MIPS_INST_SYSCALL 0x0000000c | |
273 | #define MIPS_INST_BREAK 0x0000000d | |
274 | ||
275 | #define O32_SIGFRAME_UCONTEXT_OFFSET (16) | |
276 | #define O32_SIGSET_T_SIZE (16) | |
277 | ||
278 | #define O32_UCONTEXT_ONSTACK (O32_SIGSET_T_SIZE) | |
279 | #define O32_UCONTEXT_PC (O32_UCONTEXT_ONSTACK + 4) | |
280 | #define O32_UCONTEXT_REGS (O32_UCONTEXT_PC + 4) | |
281 | #define O32_UCONTEXT_SR (O32_UCONTEXT_REGS + 4 * 32) | |
282 | #define O32_UCONTEXT_LO (O32_UCONTEXT_SR + 4) | |
283 | #define O32_UCONTEXT_HI (O32_UCONTEXT_LO + 4) | |
284 | #define O32_UCONTEXT_FPUSED (O32_UCONTEXT_HI + 4) | |
285 | #define O32_UCONTEXT_FPREGS (O32_UCONTEXT_FPUSED + 4) | |
286 | ||
287 | #define O32_UCONTEXT_REG_SIZE 4 | |
288 | ||
289 | static void | |
290 | mips_fbsd_sigframe_init (const struct tramp_frame *self, | |
291 | struct frame_info *this_frame, | |
292 | struct trad_frame_cache *cache, | |
293 | CORE_ADDR func) | |
294 | { | |
295 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
296 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
297 | CORE_ADDR sp, ucontext_addr, addr; | |
298 | int regnum; | |
299 | gdb_byte buf[4]; | |
300 | ||
301 | /* We find the appropriate instance of `ucontext_t' at a | |
302 | fixed offset in the signal frame. */ | |
303 | sp = get_frame_register_signed (this_frame, | |
304 | MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch)); | |
305 | ucontext_addr = sp + O32_SIGFRAME_UCONTEXT_OFFSET; | |
306 | ||
307 | /* PC. */ | |
308 | regnum = mips_regnum (gdbarch)->pc; | |
309 | trad_frame_set_reg_addr (cache, | |
310 | regnum + gdbarch_num_regs (gdbarch), | |
311 | ucontext_addr + O32_UCONTEXT_PC); | |
312 | ||
313 | /* GPRs. */ | |
314 | for (regnum = MIPS_ZERO_REGNUM, addr = ucontext_addr + O32_UCONTEXT_REGS; | |
315 | regnum <= MIPS_RA_REGNUM; regnum++, addr += O32_UCONTEXT_REG_SIZE) | |
316 | trad_frame_set_reg_addr (cache, | |
317 | regnum + gdbarch_num_regs (gdbarch), | |
318 | addr); | |
319 | ||
320 | regnum = MIPS_PS_REGNUM; | |
321 | trad_frame_set_reg_addr (cache, | |
322 | regnum + gdbarch_num_regs (gdbarch), | |
323 | ucontext_addr + O32_UCONTEXT_SR); | |
324 | ||
325 | /* HI and LO. */ | |
326 | regnum = mips_regnum (gdbarch)->lo; | |
327 | trad_frame_set_reg_addr (cache, | |
328 | regnum + gdbarch_num_regs (gdbarch), | |
329 | ucontext_addr + O32_UCONTEXT_LO); | |
330 | regnum = mips_regnum (gdbarch)->hi; | |
331 | trad_frame_set_reg_addr (cache, | |
332 | regnum + gdbarch_num_regs (gdbarch), | |
333 | ucontext_addr + O32_UCONTEXT_HI); | |
334 | ||
1c33cd7f YQ |
335 | if (target_read_memory (ucontext_addr + O32_UCONTEXT_FPUSED, buf, 4) == 0 |
336 | && extract_unsigned_integer (buf, 4, byte_order) != 0) | |
387360da JB |
337 | { |
338 | for (regnum = 0, addr = ucontext_addr + O32_UCONTEXT_FPREGS; | |
339 | regnum < 32; regnum++, addr += O32_UCONTEXT_REG_SIZE) | |
340 | trad_frame_set_reg_addr (cache, | |
341 | regnum + gdbarch_fp0_regnum (gdbarch), | |
342 | addr); | |
343 | trad_frame_set_reg_addr (cache, mips_regnum (gdbarch)->fp_control_status, | |
344 | addr); | |
345 | } | |
346 | ||
347 | trad_frame_set_id (cache, frame_id_build (sp, func)); | |
348 | } | |
349 | ||
350 | #define MIPS_INST_ADDIU_A0_SP_O32 (0x27a40000 \ | |
351 | + O32_SIGFRAME_UCONTEXT_OFFSET) | |
352 | ||
353 | static const struct tramp_frame mips_fbsd_sigframe = | |
354 | { | |
355 | SIGTRAMP_FRAME, | |
356 | MIPS_INSN32_SIZE, | |
357 | { | |
358 | { MIPS_INST_ADDIU_A0_SP_O32, -1 }, /* addiu a0, sp, SIGF_UC */ | |
359 | { MIPS_INST_LI_V0_SIGRETURN, -1 }, /* li v0, SYS_sigreturn */ | |
360 | { MIPS_INST_SYSCALL, -1 }, /* syscall */ | |
361 | { MIPS_INST_BREAK, -1 }, /* break */ | |
362 | { TRAMP_SENTINEL_INSN, -1 } | |
363 | }, | |
364 | mips_fbsd_sigframe_init | |
365 | }; | |
366 | ||
367 | #define N64_SIGFRAME_UCONTEXT_OFFSET (32) | |
368 | #define N64_SIGSET_T_SIZE (16) | |
369 | ||
370 | #define N64_UCONTEXT_ONSTACK (N64_SIGSET_T_SIZE) | |
371 | #define N64_UCONTEXT_PC (N64_UCONTEXT_ONSTACK + 8) | |
372 | #define N64_UCONTEXT_REGS (N64_UCONTEXT_PC + 8) | |
373 | #define N64_UCONTEXT_SR (N64_UCONTEXT_REGS + 8 * 32) | |
374 | #define N64_UCONTEXT_LO (N64_UCONTEXT_SR + 8) | |
375 | #define N64_UCONTEXT_HI (N64_UCONTEXT_LO + 8) | |
376 | #define N64_UCONTEXT_FPUSED (N64_UCONTEXT_HI + 8) | |
377 | #define N64_UCONTEXT_FPREGS (N64_UCONTEXT_FPUSED + 8) | |
378 | ||
379 | #define N64_UCONTEXT_REG_SIZE 8 | |
380 | ||
381 | static void | |
382 | mips64_fbsd_sigframe_init (const struct tramp_frame *self, | |
383 | struct frame_info *this_frame, | |
384 | struct trad_frame_cache *cache, | |
385 | CORE_ADDR func) | |
386 | { | |
387 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
388 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
389 | CORE_ADDR sp, ucontext_addr, addr; | |
390 | int regnum; | |
391 | gdb_byte buf[4]; | |
392 | ||
393 | /* We find the appropriate instance of `ucontext_t' at a | |
394 | fixed offset in the signal frame. */ | |
395 | sp = get_frame_register_signed (this_frame, | |
396 | MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch)); | |
397 | ucontext_addr = sp + N64_SIGFRAME_UCONTEXT_OFFSET; | |
398 | ||
399 | /* PC. */ | |
400 | regnum = mips_regnum (gdbarch)->pc; | |
401 | trad_frame_set_reg_addr (cache, | |
402 | regnum + gdbarch_num_regs (gdbarch), | |
403 | ucontext_addr + N64_UCONTEXT_PC); | |
404 | ||
405 | /* GPRs. */ | |
406 | for (regnum = MIPS_ZERO_REGNUM, addr = ucontext_addr + N64_UCONTEXT_REGS; | |
407 | regnum <= MIPS_RA_REGNUM; regnum++, addr += N64_UCONTEXT_REG_SIZE) | |
408 | trad_frame_set_reg_addr (cache, | |
409 | regnum + gdbarch_num_regs (gdbarch), | |
410 | addr); | |
411 | ||
412 | regnum = MIPS_PS_REGNUM; | |
413 | trad_frame_set_reg_addr (cache, | |
414 | regnum + gdbarch_num_regs (gdbarch), | |
415 | ucontext_addr + N64_UCONTEXT_SR); | |
416 | ||
417 | /* HI and LO. */ | |
418 | regnum = mips_regnum (gdbarch)->lo; | |
419 | trad_frame_set_reg_addr (cache, | |
420 | regnum + gdbarch_num_regs (gdbarch), | |
421 | ucontext_addr + N64_UCONTEXT_LO); | |
422 | regnum = mips_regnum (gdbarch)->hi; | |
423 | trad_frame_set_reg_addr (cache, | |
424 | regnum + gdbarch_num_regs (gdbarch), | |
425 | ucontext_addr + N64_UCONTEXT_HI); | |
426 | ||
1c33cd7f YQ |
427 | if (target_read_memory (ucontext_addr + N64_UCONTEXT_FPUSED, buf, 4) == 0 |
428 | && extract_unsigned_integer (buf, 4, byte_order) != 0) | |
387360da JB |
429 | { |
430 | for (regnum = 0, addr = ucontext_addr + N64_UCONTEXT_FPREGS; | |
431 | regnum < 32; regnum++, addr += N64_UCONTEXT_REG_SIZE) | |
432 | trad_frame_set_reg_addr (cache, | |
433 | regnum + gdbarch_fp0_regnum (gdbarch), | |
434 | addr); | |
435 | trad_frame_set_reg_addr (cache, mips_regnum (gdbarch)->fp_control_status, | |
436 | addr); | |
437 | } | |
438 | ||
439 | trad_frame_set_id (cache, frame_id_build (sp, func)); | |
440 | } | |
441 | ||
442 | #define MIPS_INST_DADDIU_A0_SP_N64 (0x67a40000 \ | |
443 | + N64_SIGFRAME_UCONTEXT_OFFSET) | |
444 | ||
445 | static const struct tramp_frame mips64_fbsd_sigframe = | |
446 | { | |
447 | SIGTRAMP_FRAME, | |
448 | MIPS_INSN32_SIZE, | |
449 | { | |
450 | { MIPS_INST_DADDIU_A0_SP_N64, -1 }, /* daddiu a0, sp, SIGF_UC */ | |
451 | { MIPS_INST_LI_V0_SIGRETURN, -1 }, /* li v0, SYS_sigreturn */ | |
452 | { MIPS_INST_SYSCALL, -1 }, /* syscall */ | |
453 | { MIPS_INST_BREAK, -1 }, /* break */ | |
454 | { TRAMP_SENTINEL_INSN, -1 } | |
455 | }, | |
456 | mips64_fbsd_sigframe_init | |
457 | }; | |
458 | ||
459 | /* Shared library support. */ | |
460 | ||
461 | /* FreeBSD/mips uses a slightly different `struct link_map' than the | |
462 | other FreeBSD platforms as it includes an additional `l_off' | |
463 | member. */ | |
464 | ||
465 | static struct link_map_offsets * | |
466 | mips_fbsd_ilp32_fetch_link_map_offsets (void) | |
467 | { | |
468 | static struct link_map_offsets lmo; | |
469 | static struct link_map_offsets *lmp = NULL; | |
470 | ||
471 | if (lmp == NULL) | |
472 | { | |
473 | lmp = &lmo; | |
474 | ||
475 | lmo.r_version_offset = 0; | |
476 | lmo.r_version_size = 4; | |
477 | lmo.r_map_offset = 4; | |
478 | lmo.r_brk_offset = 8; | |
479 | lmo.r_ldsomap_offset = -1; | |
480 | ||
481 | lmo.link_map_size = 24; | |
482 | lmo.l_addr_offset = 0; | |
483 | lmo.l_name_offset = 8; | |
484 | lmo.l_ld_offset = 12; | |
485 | lmo.l_next_offset = 16; | |
486 | lmo.l_prev_offset = 20; | |
487 | } | |
488 | ||
489 | return lmp; | |
490 | } | |
491 | ||
492 | static struct link_map_offsets * | |
493 | mips_fbsd_lp64_fetch_link_map_offsets (void) | |
494 | { | |
495 | static struct link_map_offsets lmo; | |
496 | static struct link_map_offsets *lmp = NULL; | |
497 | ||
498 | if (lmp == NULL) | |
499 | { | |
500 | lmp = &lmo; | |
501 | ||
502 | lmo.r_version_offset = 0; | |
503 | lmo.r_version_size = 4; | |
504 | lmo.r_map_offset = 8; | |
505 | lmo.r_brk_offset = 16; | |
506 | lmo.r_ldsomap_offset = -1; | |
507 | ||
508 | lmo.link_map_size = 48; | |
509 | lmo.l_addr_offset = 0; | |
510 | lmo.l_name_offset = 16; | |
511 | lmo.l_ld_offset = 24; | |
512 | lmo.l_next_offset = 32; | |
513 | lmo.l_prev_offset = 40; | |
514 | } | |
515 | ||
516 | return lmp; | |
517 | } | |
518 | ||
519 | static void | |
520 | mips_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
521 | { | |
522 | enum mips_abi abi = mips_abi (gdbarch); | |
523 | ||
524 | /* Generic FreeBSD support. */ | |
525 | fbsd_init_abi (info, gdbarch); | |
526 | ||
527 | set_gdbarch_software_single_step (gdbarch, mips_software_single_step); | |
528 | ||
529 | switch (abi) | |
530 | { | |
531 | case MIPS_ABI_O32: | |
532 | tramp_frame_prepend_unwinder (gdbarch, &mips_fbsd_sigframe); | |
533 | break; | |
534 | case MIPS_ABI_N32: | |
535 | break; | |
536 | case MIPS_ABI_N64: | |
537 | tramp_frame_prepend_unwinder (gdbarch, &mips64_fbsd_sigframe); | |
538 | break; | |
539 | } | |
540 | ||
541 | set_gdbarch_iterate_over_regset_sections | |
542 | (gdbarch, mips_fbsd_iterate_over_regset_sections); | |
543 | ||
544 | /* FreeBSD/mips has SVR4-style shared libraries. */ | |
545 | set_solib_svr4_fetch_link_map_offsets | |
546 | (gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ? | |
547 | mips_fbsd_ilp32_fetch_link_map_offsets : | |
548 | mips_fbsd_lp64_fetch_link_map_offsets)); | |
549 | } | |
550 | \f | |
551 | ||
552 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
553 | void _initialize_mips_fbsd_tdep (void); | |
554 | ||
555 | void | |
556 | _initialize_mips_fbsd_tdep (void) | |
557 | { | |
c988ac1d | 558 | gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_FREEBSD, |
387360da JB |
559 | mips_fbsd_init_abi); |
560 | } |