Commit | Line | Data |
---|---|---|
75c9abc6 | 1 | /* Native-dependent code for GNU/Linux on MIPS processors. |
a094c6fb | 2 | |
6aba47ca | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
dc60ece8 | 4 | Free Software Foundation, Inc. |
2aa830e4 DJ |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
2aa830e4 DJ |
22 | |
23 | #include "defs.h" | |
d37eb719 | 24 | #include "inferior.h" |
6b753f60 | 25 | #include "mips-tdep.h" |
10d6c8cd | 26 | #include "target.h" |
28f5035f | 27 | #include "regcache.h" |
10d6c8cd | 28 | #include "linux-nat.h" |
d37eb719 | 29 | #include "mips-linux-tdep.h" |
2aa830e4 | 30 | |
dc60ece8 | 31 | #include "gdb_proc_service.h" |
3e00823e | 32 | #include "gregset.h" |
dc60ece8 | 33 | |
d37eb719 DJ |
34 | #include <sys/ptrace.h> |
35 | ||
dc60ece8 DJ |
36 | #ifndef PTRACE_GET_THREAD_AREA |
37 | #define PTRACE_GET_THREAD_AREA 25 | |
38 | #endif | |
39 | ||
d37eb719 DJ |
40 | /* Assume that we have PTRACE_GETREGS et al. support. If we do not, |
41 | we'll clear this and use PTRACE_PEEKUSER instead. */ | |
42 | static int have_ptrace_regsets = 1; | |
43 | ||
44 | /* Saved function pointers to fetch and store a single register using | |
45 | PTRACE_PEEKUSER and PTRACE_POKEUSER. */ | |
46 | ||
56be3814 UW |
47 | void (*super_fetch_registers) (struct regcache *, int); |
48 | void (*super_store_registers) (struct regcache *, int); | |
d37eb719 | 49 | |
dda0c97e | 50 | /* Map gdb internal register number to ptrace ``address''. |
7714d83a UW |
51 | These ``addresses'' are normally defined in <asm/ptrace.h>. |
52 | ||
53 | ptrace does not provide a way to read (or set) MIPS_PS_REGNUM, | |
54 | and there's no point in reading or setting MIPS_ZERO_REGNUM. | |
55 | We also can not set BADVADDR, CAUSE, or FCRIR via ptrace(). */ | |
dda0c97e UW |
56 | |
57 | static CORE_ADDR | |
7714d83a | 58 | mips_linux_register_addr (struct gdbarch *gdbarch, int regno, int store) |
dda0c97e | 59 | { |
7714d83a | 60 | CORE_ADDR regaddr; |
dda0c97e UW |
61 | |
62 | if (regno < 0 || regno >= NUM_REGS) | |
63 | error (_("Bogon register number %d."), regno); | |
64 | ||
7714d83a | 65 | if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32) |
dda0c97e | 66 | regaddr = regno; |
7714d83a UW |
67 | else if ((regno >= mips_regnum (gdbarch)->fp0) |
68 | && (regno < mips_regnum (gdbarch)->fp0 + 32)) | |
69 | regaddr = FPR_BASE + (regno - mips_regnum (gdbarch)->fp0); | |
70 | else if (regno == mips_regnum (gdbarch)->pc) | |
dda0c97e | 71 | regaddr = PC; |
7714d83a UW |
72 | else if (regno == mips_regnum (gdbarch)->cause) |
73 | regaddr = store? (CORE_ADDR) -1 : CAUSE; | |
74 | else if (regno == mips_regnum (gdbarch)->badvaddr) | |
75 | regaddr = store? (CORE_ADDR) -1 : BADVADDR; | |
76 | else if (regno == mips_regnum (gdbarch)->lo) | |
dda0c97e | 77 | regaddr = MMLO; |
7714d83a | 78 | else if (regno == mips_regnum (gdbarch)->hi) |
dda0c97e | 79 | regaddr = MMHI; |
7714d83a | 80 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
dda0c97e | 81 | regaddr = FPC_CSR; |
7714d83a UW |
82 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
83 | regaddr = store? (CORE_ADDR) -1 : FPC_EIR; | |
dda0c97e | 84 | else |
7714d83a | 85 | regaddr = (CORE_ADDR) -1; |
dda0c97e UW |
86 | |
87 | return regaddr; | |
88 | } | |
89 | ||
90 | static CORE_ADDR | |
7714d83a | 91 | mips64_linux_register_addr (struct gdbarch *gdbarch, int regno, int store) |
dda0c97e | 92 | { |
7714d83a | 93 | CORE_ADDR regaddr; |
dda0c97e UW |
94 | |
95 | if (regno < 0 || regno >= NUM_REGS) | |
96 | error (_("Bogon register number %d."), regno); | |
97 | ||
7714d83a | 98 | if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32) |
dda0c97e | 99 | regaddr = regno; |
7714d83a UW |
100 | else if ((regno >= mips_regnum (gdbarch)->fp0) |
101 | && (regno < mips_regnum (gdbarch)->fp0 + 32)) | |
dda0c97e | 102 | regaddr = MIPS64_FPR_BASE + (regno - FP0_REGNUM); |
7714d83a | 103 | else if (regno == mips_regnum (gdbarch)->pc) |
dda0c97e | 104 | regaddr = MIPS64_PC; |
7714d83a UW |
105 | else if (regno == mips_regnum (gdbarch)->cause) |
106 | regaddr = store? (CORE_ADDR) -1 : MIPS64_CAUSE; | |
107 | else if (regno == mips_regnum (gdbarch)->badvaddr) | |
108 | regaddr = store? (CORE_ADDR) -1 : MIPS64_BADVADDR; | |
109 | else if (regno == mips_regnum (gdbarch)->lo) | |
dda0c97e | 110 | regaddr = MIPS64_MMLO; |
7714d83a | 111 | else if (regno == mips_regnum (gdbarch)->hi) |
dda0c97e | 112 | regaddr = MIPS64_MMHI; |
7714d83a | 113 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
dda0c97e | 114 | regaddr = MIPS64_FPC_CSR; |
7714d83a UW |
115 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
116 | regaddr = store? (CORE_ADDR) -1 : MIPS64_FPC_EIR; | |
dda0c97e | 117 | else |
7714d83a | 118 | regaddr = (CORE_ADDR) -1; |
dda0c97e UW |
119 | |
120 | return regaddr; | |
121 | } | |
122 | ||
dc60ece8 DJ |
123 | /* Fetch the thread-local storage pointer for libthread_db. */ |
124 | ||
125 | ps_err_e | |
126 | ps_get_thread_area (const struct ps_prochandle *ph, | |
127 | lwpid_t lwpid, int idx, void **base) | |
128 | { | |
129 | if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0) | |
130 | return PS_ERR; | |
131 | ||
132 | /* IDX is the bias from the thread pointer to the beginning of the | |
133 | thread descriptor. It has to be subtracted due to implementation | |
134 | quirks in libthread_db. */ | |
135 | *base = (void *) ((char *)*base - idx); | |
136 | ||
137 | return PS_OK; | |
138 | } | |
139 | ||
3e00823e UW |
140 | /* Wrapper functions. These are only used by libthread_db. */ |
141 | ||
142 | void | |
7f7fe91e | 143 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) |
3e00823e UW |
144 | { |
145 | if (mips_isa_regsize (current_gdbarch) == 4) | |
7f7fe91e | 146 | mips_supply_gregset (regcache, (const mips_elf_gregset_t *) gregsetp); |
3e00823e | 147 | else |
7f7fe91e | 148 | mips64_supply_gregset (regcache, (const mips64_elf_gregset_t *) gregsetp); |
3e00823e UW |
149 | } |
150 | ||
151 | void | |
7f7fe91e UW |
152 | fill_gregset (const struct regcache *regcache, |
153 | gdb_gregset_t *gregsetp, int regno) | |
3e00823e UW |
154 | { |
155 | if (mips_isa_regsize (current_gdbarch) == 4) | |
7f7fe91e | 156 | mips_fill_gregset (regcache, (mips_elf_gregset_t *) gregsetp, regno); |
3e00823e | 157 | else |
7f7fe91e | 158 | mips64_fill_gregset (regcache, (mips64_elf_gregset_t *) gregsetp, regno); |
3e00823e UW |
159 | } |
160 | ||
161 | void | |
7f7fe91e | 162 | supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) |
3e00823e UW |
163 | { |
164 | if (mips_isa_regsize (current_gdbarch) == 4) | |
7f7fe91e | 165 | mips_supply_fpregset (regcache, (const mips_elf_fpregset_t *) fpregsetp); |
3e00823e | 166 | else |
7f7fe91e | 167 | mips64_supply_fpregset (regcache, (const mips64_elf_fpregset_t *) fpregsetp); |
3e00823e UW |
168 | } |
169 | ||
170 | void | |
7f7fe91e UW |
171 | fill_fpregset (const struct regcache *regcache, |
172 | gdb_fpregset_t *fpregsetp, int regno) | |
3e00823e UW |
173 | { |
174 | if (mips_isa_regsize (current_gdbarch) == 4) | |
7f7fe91e | 175 | mips_fill_fpregset (regcache, (mips_elf_fpregset_t *) fpregsetp, regno); |
3e00823e | 176 | else |
7f7fe91e | 177 | mips64_fill_fpregset (regcache, (mips64_elf_fpregset_t *) fpregsetp, regno); |
3e00823e UW |
178 | } |
179 | ||
180 | ||
d37eb719 DJ |
181 | /* Fetch REGNO (or all registers if REGNO == -1) from the target |
182 | using PTRACE_GETREGS et al. */ | |
183 | ||
184 | static void | |
56be3814 | 185 | mips64_linux_regsets_fetch_registers (struct regcache *regcache, int regno) |
d37eb719 DJ |
186 | { |
187 | int is_fp; | |
188 | int tid; | |
189 | ||
190 | if (regno >= mips_regnum (current_gdbarch)->fp0 | |
191 | && regno <= mips_regnum (current_gdbarch)->fp0 + 32) | |
192 | is_fp = 1; | |
193 | else if (regno == mips_regnum (current_gdbarch)->fp_control_status) | |
194 | is_fp = 1; | |
195 | else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision) | |
196 | is_fp = 1; | |
197 | else | |
198 | is_fp = 0; | |
199 | ||
200 | tid = ptid_get_lwp (inferior_ptid); | |
201 | if (tid == 0) | |
202 | tid = ptid_get_pid (inferior_ptid); | |
203 | ||
204 | if (regno == -1 || !is_fp) | |
205 | { | |
206 | mips64_elf_gregset_t regs; | |
207 | ||
208 | if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1) | |
209 | { | |
210 | if (errno == EIO) | |
211 | { | |
212 | have_ptrace_regsets = 0; | |
213 | return; | |
214 | } | |
215 | perror_with_name (_("Couldn't get registers")); | |
216 | } | |
217 | ||
56be3814 | 218 | mips64_supply_gregset (regcache, |
28f5035f | 219 | (const mips64_elf_gregset_t *) ®s); |
d37eb719 DJ |
220 | } |
221 | ||
222 | if (regno == -1 || is_fp) | |
223 | { | |
224 | mips64_elf_fpregset_t fp_regs; | |
225 | ||
226 | if (ptrace (PTRACE_GETFPREGS, tid, 0L, | |
227 | (PTRACE_TYPE_ARG3) &fp_regs) == -1) | |
228 | { | |
229 | if (errno == EIO) | |
230 | { | |
231 | have_ptrace_regsets = 0; | |
232 | return; | |
233 | } | |
234 | perror_with_name (_("Couldn't get FP registers")); | |
235 | } | |
236 | ||
56be3814 | 237 | mips64_supply_fpregset (regcache, |
28f5035f | 238 | (const mips64_elf_fpregset_t *) &fp_regs); |
d37eb719 DJ |
239 | } |
240 | } | |
241 | ||
242 | /* Store REGNO (or all registers if REGNO == -1) to the target | |
243 | using PTRACE_SETREGS et al. */ | |
244 | ||
245 | static void | |
56be3814 | 246 | mips64_linux_regsets_store_registers (const struct regcache *regcache, int regno) |
d37eb719 DJ |
247 | { |
248 | int is_fp; | |
249 | int tid; | |
250 | ||
251 | if (regno >= mips_regnum (current_gdbarch)->fp0 | |
252 | && regno <= mips_regnum (current_gdbarch)->fp0 + 32) | |
253 | is_fp = 1; | |
254 | else if (regno == mips_regnum (current_gdbarch)->fp_control_status) | |
255 | is_fp = 1; | |
256 | else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision) | |
257 | is_fp = 1; | |
258 | else | |
259 | is_fp = 0; | |
260 | ||
261 | tid = ptid_get_lwp (inferior_ptid); | |
262 | if (tid == 0) | |
263 | tid = ptid_get_pid (inferior_ptid); | |
264 | ||
265 | if (regno == -1 || !is_fp) | |
266 | { | |
267 | mips64_elf_gregset_t regs; | |
268 | ||
269 | if (ptrace (PTRACE_GETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1) | |
270 | perror_with_name (_("Couldn't get registers")); | |
271 | ||
56be3814 | 272 | mips64_fill_gregset (regcache, ®s, regno); |
d37eb719 DJ |
273 | |
274 | if (ptrace (PTRACE_SETREGS, tid, 0L, (PTRACE_TYPE_ARG3) ®s) == -1) | |
275 | perror_with_name (_("Couldn't set registers")); | |
276 | } | |
277 | ||
278 | if (regno == -1 || is_fp) | |
279 | { | |
280 | mips64_elf_fpregset_t fp_regs; | |
281 | ||
282 | if (ptrace (PTRACE_GETFPREGS, tid, 0L, | |
283 | (PTRACE_TYPE_ARG3) &fp_regs) == -1) | |
284 | perror_with_name (_("Couldn't get FP registers")); | |
285 | ||
56be3814 | 286 | mips64_fill_fpregset (regcache, &fp_regs, regno); |
d37eb719 DJ |
287 | |
288 | if (ptrace (PTRACE_SETFPREGS, tid, 0L, | |
289 | (PTRACE_TYPE_ARG3) &fp_regs) == -1) | |
290 | perror_with_name (_("Couldn't set FP registers")); | |
291 | } | |
292 | } | |
293 | ||
294 | /* Fetch REGNO (or all registers if REGNO == -1) from the target | |
295 | using any working method. */ | |
296 | ||
297 | static void | |
56be3814 | 298 | mips64_linux_fetch_registers (struct regcache *regcache, int regnum) |
d37eb719 DJ |
299 | { |
300 | /* Unless we already know that PTRACE_GETREGS does not work, try it. */ | |
301 | if (have_ptrace_regsets) | |
56be3814 | 302 | mips64_linux_regsets_fetch_registers (regcache, regnum); |
d37eb719 DJ |
303 | |
304 | /* If we know, or just found out, that PTRACE_GETREGS does not work, fall | |
305 | back to PTRACE_PEEKUSER. */ | |
306 | if (!have_ptrace_regsets) | |
56be3814 | 307 | super_fetch_registers (regcache, regnum); |
d37eb719 DJ |
308 | } |
309 | ||
310 | /* Store REGNO (or all registers if REGNO == -1) to the target | |
311 | using any working method. */ | |
312 | ||
313 | static void | |
56be3814 | 314 | mips64_linux_store_registers (struct regcache *regcache, int regnum) |
d37eb719 DJ |
315 | { |
316 | /* Unless we already know that PTRACE_GETREGS does not work, try it. */ | |
317 | if (have_ptrace_regsets) | |
56be3814 | 318 | mips64_linux_regsets_store_registers (regcache, regnum); |
d37eb719 DJ |
319 | |
320 | /* If we know, or just found out, that PTRACE_GETREGS does not work, fall | |
321 | back to PTRACE_PEEKUSER. */ | |
322 | if (!have_ptrace_regsets) | |
56be3814 | 323 | super_store_registers (regcache, regnum); |
d37eb719 DJ |
324 | } |
325 | ||
910122bf UW |
326 | /* Return the address in the core dump or inferior of register |
327 | REGNO. */ | |
328 | ||
329 | static CORE_ADDR | |
7714d83a | 330 | mips_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p) |
910122bf | 331 | { |
7714d83a UW |
332 | if (mips_abi_regsize (gdbarch) == 8) |
333 | return mips64_linux_register_addr (gdbarch, regno, store_p); | |
dda0c97e | 334 | else |
7714d83a | 335 | return mips_linux_register_addr (gdbarch, regno, store_p); |
910122bf UW |
336 | } |
337 | ||
10d6c8cd DJ |
338 | void _initialize_mips_linux_nat (void); |
339 | ||
340 | void | |
341 | _initialize_mips_linux_nat (void) | |
342 | { | |
910122bf | 343 | struct target_ops *t = linux_trad_target (mips_linux_register_u_offset); |
d37eb719 DJ |
344 | |
345 | super_fetch_registers = t->to_fetch_registers; | |
346 | super_store_registers = t->to_store_registers; | |
347 | ||
348 | t->to_fetch_registers = mips64_linux_fetch_registers; | |
349 | t->to_store_registers = mips64_linux_store_registers; | |
350 | ||
f973ed9c | 351 | linux_nat_add_target (t); |
10d6c8cd | 352 | } |