Commit | Line | Data |
---|---|---|
c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d | 2 | |
ecd75fc8 | 3 | Copyright (C) 1986-2014 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 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/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "inferior.h" | |
22 | #include "target.h" | |
23 | #include "gdbcore.h" | |
c906108c SS |
24 | #include "symfile.h" |
25 | #include "objfiles.h" | |
42203e46 | 26 | #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ |
c906108c | 27 | #include "bfd.h" |
60250e8b | 28 | #include "exceptions.h" |
c906108c | 29 | #include "gdb-stabs.h" |
4e052eda | 30 | #include "regcache.h" |
19caaa45 | 31 | #include "arch-utils.h" |
dab06dbe | 32 | #include "inf-child.h" |
037a727e | 33 | #include "inf-ptrace.h" |
11bf77db | 34 | #include "ppc-tdep.h" |
6f7f3f0d | 35 | #include "rs6000-tdep.h" |
356a5233 | 36 | #include "rs6000-aix-tdep.h" |
4646aa9d | 37 | #include "exec.h" |
06d3b283 | 38 | #include "observer.h" |
63807e1d | 39 | #include "xcoffread.h" |
c906108c SS |
40 | |
41 | #include <sys/ptrace.h> | |
42 | #include <sys/reg.h> | |
43 | ||
c906108c SS |
44 | #include <sys/dir.h> |
45 | #include <sys/user.h> | |
46 | #include <signal.h> | |
47 | #include <sys/ioctl.h> | |
48 | #include <fcntl.h> | |
49 | ||
50 | #include <a.out.h> | |
51 | #include <sys/file.h> | |
53ce3c39 | 52 | #include <sys/stat.h> |
92107356 | 53 | #include "gdb_bfd.h" |
c906108c | 54 | #include <sys/core.h> |
7a78ae4e ND |
55 | #define __LDINFO_PTRACE32__ /* for __ld_info32 */ |
56 | #define __LDINFO_PTRACE64__ /* for __ld_info64 */ | |
c906108c | 57 | #include <sys/ldr.h> |
7a78ae4e | 58 | #include <sys/systemcfg.h> |
c906108c | 59 | |
7a78ae4e ND |
60 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
61 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
0df8b418 | 62 | accessing fields in the appropriate structures. */ |
7a78ae4e ND |
63 | |
64 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
0df8b418 | 65 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ |
7a78ae4e | 66 | |
b08ee99f | 67 | #if defined (__ld_info32) || defined (__ld_info64) |
7a78ae4e ND |
68 | # define ARCH3264 |
69 | #endif | |
70 | ||
0df8b418 | 71 | /* Return whether the current architecture is 64-bit. */ |
7a78ae4e ND |
72 | |
73 | #ifndef ARCH3264 | |
74 | # define ARCH64() 0 | |
75 | #else | |
f5656ead | 76 | # define ARCH64() (register_size (target_gdbarch (), 0) == 8) |
7a78ae4e ND |
77 | #endif |
78 | ||
fb14de7b | 79 | static void exec_one_dummy_insn (struct regcache *); |
c906108c | 80 | |
05804640 | 81 | static target_xfer_partial_ftype rs6000_xfer_shared_libraries; |
4d1eb6b4 | 82 | |
dd7be90a KB |
83 | /* Given REGNO, a gdb register number, return the corresponding |
84 | number suitable for use as a ptrace() parameter. Return -1 if | |
85 | there's no suitable mapping. Also, set the int pointed to by | |
86 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 87 | |
dd7be90a | 88 | static int |
206988c4 | 89 | regmap (struct gdbarch *gdbarch, int regno, int *isfloat) |
c5aa993b | 90 | { |
206988c4 | 91 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
92 | |
93 | *isfloat = 0; | |
8bf659e8 JB |
94 | if (tdep->ppc_gp0_regnum <= regno |
95 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 96 | return regno; |
383f0f5b JB |
97 | else if (tdep->ppc_fp0_regnum >= 0 |
98 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 99 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
100 | { |
101 | *isfloat = 1; | |
366f009f | 102 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a | 103 | } |
206988c4 | 104 | else if (regno == gdbarch_pc_regnum (gdbarch)) |
dd7be90a KB |
105 | return IAR; |
106 | else if (regno == tdep->ppc_ps_regnum) | |
107 | return MSR; | |
108 | else if (regno == tdep->ppc_cr_regnum) | |
109 | return CR; | |
110 | else if (regno == tdep->ppc_lr_regnum) | |
111 | return LR; | |
112 | else if (regno == tdep->ppc_ctr_regnum) | |
113 | return CTR; | |
114 | else if (regno == tdep->ppc_xer_regnum) | |
115 | return XER; | |
383f0f5b JB |
116 | else if (tdep->ppc_fpscr_regnum >= 0 |
117 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 118 | return FPSCR; |
dd7be90a KB |
119 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
120 | return MQ; | |
121 | else | |
122 | return -1; | |
123 | } | |
c906108c | 124 | |
0df8b418 | 125 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 126 | |
7a78ae4e | 127 | static int |
8b5790f2 | 128 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e | 129 | { |
1ed3ee94 | 130 | #ifdef HAVE_PTRACE64 |
11cb8762 | 131 | int ret = ptrace64 (req, id, (uintptr_t) addr, data, buf); |
1ed3ee94 | 132 | #else |
7a78ae4e | 133 | int ret = ptrace (req, id, (int *)addr, data, buf); |
1ed3ee94 | 134 | #endif |
7a78ae4e | 135 | #if 0 |
8b5790f2 | 136 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
137 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
138 | #endif | |
139 | return ret; | |
140 | } | |
c906108c | 141 | |
0df8b418 | 142 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 143 | |
7a78ae4e | 144 | static int |
0d16ee5d | 145 | rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) |
7a78ae4e ND |
146 | { |
147 | #ifdef ARCH3264 | |
1ed3ee94 | 148 | # ifdef HAVE_PTRACE64 |
b08ee99f | 149 | int ret = ptrace64 (req, id, addr, data, buf); |
1ed3ee94 | 150 | # else |
7a78ae4e | 151 | int ret = ptracex (req, id, addr, data, buf); |
1ed3ee94 | 152 | # endif |
7a78ae4e ND |
153 | #else |
154 | int ret = 0; | |
155 | #endif | |
156 | #if 0 | |
2244ba2e PM |
157 | printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n", |
158 | req, id, hex_string (addr), data, (unsigned int)buf, ret); | |
7a78ae4e ND |
159 | #endif |
160 | return ret; | |
161 | } | |
c906108c | 162 | |
0df8b418 | 163 | /* Fetch register REGNO from the inferior. */ |
c906108c | 164 | |
7a78ae4e | 165 | static void |
56be3814 | 166 | fetch_register (struct regcache *regcache, int regno) |
7a78ae4e | 167 | { |
8b164abb | 168 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 169 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 170 | int nr, isfloat; |
c906108c | 171 | |
0df8b418 | 172 | /* Retrieved values may be -1, so infer errors from errno. */ |
7a78ae4e | 173 | errno = 0; |
c906108c | 174 | |
206988c4 | 175 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 176 | |
0df8b418 | 177 | /* Floating-point registers. */ |
dd7be90a | 178 | if (isfloat) |
dfd4cc63 | 179 | rs6000_ptrace32 (PT_READ_FPR, ptid_get_pid (inferior_ptid), addr, nr, 0); |
c906108c | 180 | |
0df8b418 | 181 | /* Bogus register number. */ |
dd7be90a | 182 | else if (nr < 0) |
2a18e3d9 | 183 | { |
8b164abb | 184 | if (regno >= gdbarch_num_regs (gdbarch)) |
2a18e3d9 EZ |
185 | fprintf_unfiltered (gdb_stderr, |
186 | "gdb error: register no %d not implemented.\n", | |
187 | regno); | |
dd7be90a | 188 | return; |
2a18e3d9 | 189 | } |
c906108c | 190 | |
0df8b418 | 191 | /* Fixed-point registers. */ |
7a78ae4e ND |
192 | else |
193 | { | |
7a78ae4e | 194 | if (!ARCH64 ()) |
dfd4cc63 | 195 | *addr = rs6000_ptrace32 (PT_READ_GPR, ptid_get_pid (inferior_ptid), |
0df8b418 | 196 | (int *) nr, 0, 0); |
7a78ae4e ND |
197 | else |
198 | { | |
199 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
0df8b418 | 200 | even if the register is really only 32 bits. */ |
7a78ae4e | 201 | long long buf; |
dfd4cc63 LM |
202 | rs6000_ptrace64 (PT_READ_GPR, ptid_get_pid (inferior_ptid), |
203 | nr, 0, &buf); | |
8b164abb | 204 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
205 | memcpy (addr, &buf, 8); |
206 | else | |
207 | *addr = buf; | |
208 | } | |
209 | } | |
210 | ||
211 | if (!errno) | |
56be3814 | 212 | regcache_raw_supply (regcache, regno, (char *) addr); |
7a78ae4e ND |
213 | else |
214 | { | |
215 | #if 0 | |
0df8b418 | 216 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ |
9b20d036 | 217 | perror (_("ptrace read")); |
7a78ae4e ND |
218 | #endif |
219 | errno = 0; | |
220 | } | |
c906108c SS |
221 | } |
222 | ||
0df8b418 | 223 | /* Store register REGNO back into the inferior. */ |
c906108c | 224 | |
7a78ae4e | 225 | static void |
fb14de7b | 226 | store_register (struct regcache *regcache, int regno) |
c906108c | 227 | { |
8b164abb | 228 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 229 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 230 | int nr, isfloat; |
c906108c | 231 | |
11bf77db | 232 | /* Fetch the register's value from the register cache. */ |
56be3814 | 233 | regcache_raw_collect (regcache, regno, addr); |
11bf77db | 234 | |
0df8b418 | 235 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
236 | errno = 0; |
237 | ||
206988c4 | 238 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 239 | |
0df8b418 | 240 | /* Floating-point registers. */ |
dd7be90a | 241 | if (isfloat) |
dfd4cc63 | 242 | rs6000_ptrace32 (PT_WRITE_FPR, ptid_get_pid (inferior_ptid), addr, nr, 0); |
c906108c | 243 | |
0df8b418 | 244 | /* Bogus register number. */ |
dd7be90a | 245 | else if (nr < 0) |
7a78ae4e | 246 | { |
8b164abb | 247 | if (regno >= gdbarch_num_regs (gdbarch)) |
7a78ae4e ND |
248 | fprintf_unfiltered (gdb_stderr, |
249 | "gdb error: register no %d not implemented.\n", | |
250 | regno); | |
251 | } | |
c906108c | 252 | |
0df8b418 | 253 | /* Fixed-point registers. */ |
7a78ae4e ND |
254 | else |
255 | { | |
8b164abb | 256 | if (regno == gdbarch_sp_regnum (gdbarch)) |
7a78ae4e ND |
257 | /* Execute one dummy instruction (which is a breakpoint) in inferior |
258 | process to give kernel a chance to do internal housekeeping. | |
259 | Otherwise the following ptrace(2) calls will mess up user stack | |
260 | since kernel will get confused about the bottom of the stack | |
0df8b418 | 261 | (%sp). */ |
fb14de7b | 262 | exec_one_dummy_insn (regcache); |
c906108c | 263 | |
11bf77db KB |
264 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
265 | the register's value is passed by value, but for 64-bit inferiors, | |
266 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 267 | if (!ARCH64 ()) |
dfd4cc63 | 268 | rs6000_ptrace32 (PT_WRITE_GPR, ptid_get_pid (inferior_ptid), |
0df8b418 | 269 | (int *) nr, *addr, 0); |
7a78ae4e | 270 | else |
c906108c | 271 | { |
7a78ae4e | 272 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
0df8b418 | 273 | area, even if the register is really only 32 bits. */ |
7a78ae4e | 274 | long long buf; |
8b164abb | 275 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
276 | memcpy (&buf, addr, 8); |
277 | else | |
278 | buf = *addr; | |
dfd4cc63 LM |
279 | rs6000_ptrace64 (PT_WRITE_GPR, ptid_get_pid (inferior_ptid), |
280 | nr, 0, &buf); | |
c906108c SS |
281 | } |
282 | } | |
283 | ||
7a78ae4e | 284 | if (errno) |
c906108c | 285 | { |
9b20d036 | 286 | perror (_("ptrace write")); |
7a78ae4e | 287 | errno = 0; |
c906108c | 288 | } |
7a78ae4e | 289 | } |
c906108c | 290 | |
7a78ae4e | 291 | /* Read from the inferior all registers if REGNO == -1 and just register |
0df8b418 | 292 | REGNO otherwise. */ |
c906108c | 293 | |
037a727e | 294 | static void |
28439f5e PA |
295 | rs6000_fetch_inferior_registers (struct target_ops *ops, |
296 | struct regcache *regcache, int regno) | |
7a78ae4e | 297 | { |
8b164abb | 298 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 299 | if (regno != -1) |
56be3814 | 300 | fetch_register (regcache, regno); |
7a78ae4e ND |
301 | |
302 | else | |
c906108c | 303 | { |
8b164abb | 304 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e | 305 | |
dd7be90a KB |
306 | /* Read 32 general purpose registers. */ |
307 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 308 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
309 | regno++) |
310 | { | |
56be3814 | 311 | fetch_register (regcache, regno); |
dd7be90a KB |
312 | } |
313 | ||
314 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
315 | if (tdep->ppc_fp0_regnum >= 0) |
316 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 317 | fetch_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 318 | |
dd7be90a | 319 | /* Read special registers. */ |
8b164abb | 320 | fetch_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
321 | fetch_register (regcache, tdep->ppc_ps_regnum); |
322 | fetch_register (regcache, tdep->ppc_cr_regnum); | |
323 | fetch_register (regcache, tdep->ppc_lr_regnum); | |
324 | fetch_register (regcache, tdep->ppc_ctr_regnum); | |
325 | fetch_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 326 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 327 | fetch_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 328 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 329 | fetch_register (regcache, tdep->ppc_mq_regnum); |
c906108c | 330 | } |
7a78ae4e | 331 | } |
c906108c | 332 | |
7a78ae4e ND |
333 | /* Store our register values back into the inferior. |
334 | If REGNO is -1, do this for all registers. | |
335 | Otherwise, REGNO specifies which register (so we can save time). */ | |
336 | ||
037a727e | 337 | static void |
28439f5e PA |
338 | rs6000_store_inferior_registers (struct target_ops *ops, |
339 | struct regcache *regcache, int regno) | |
7a78ae4e | 340 | { |
8b164abb | 341 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 342 | if (regno != -1) |
56be3814 | 343 | store_register (regcache, regno); |
7a78ae4e ND |
344 | |
345 | else | |
f6077098 | 346 | { |
8b164abb | 347 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
348 | |
349 | /* Write general purpose registers first. */ | |
350 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 351 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
352 | regno++) |
353 | { | |
56be3814 | 354 | store_register (regcache, regno); |
dd7be90a | 355 | } |
7a78ae4e | 356 | |
dd7be90a | 357 | /* Write floating point registers. */ |
383f0f5b JB |
358 | if (tdep->ppc_fp0_regnum >= 0) |
359 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 360 | store_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 361 | |
dd7be90a | 362 | /* Write special registers. */ |
8b164abb | 363 | store_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
364 | store_register (regcache, tdep->ppc_ps_regnum); |
365 | store_register (regcache, tdep->ppc_cr_regnum); | |
366 | store_register (regcache, tdep->ppc_lr_regnum); | |
367 | store_register (regcache, tdep->ppc_ctr_regnum); | |
368 | store_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 369 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 370 | store_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 371 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 372 | store_register (regcache, tdep->ppc_mq_regnum); |
f6077098 | 373 | } |
7a78ae4e | 374 | } |
f6077098 | 375 | |
edcc890f | 376 | /* Implement the to_xfer_partial target_ops method. */ |
7a78ae4e | 377 | |
9b409511 | 378 | static enum target_xfer_status |
037a727e UW |
379 | rs6000_xfer_partial (struct target_ops *ops, enum target_object object, |
380 | const char *annex, gdb_byte *readbuf, | |
381 | const gdb_byte *writebuf, | |
9b409511 | 382 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
7a78ae4e | 383 | { |
037a727e | 384 | pid_t pid = ptid_get_pid (inferior_ptid); |
7a78ae4e | 385 | int arch64 = ARCH64 (); |
7a78ae4e | 386 | |
037a727e | 387 | switch (object) |
c906108c | 388 | { |
ff99b71b | 389 | case TARGET_OBJECT_LIBRARIES_AIX: |
4d1eb6b4 JB |
390 | return rs6000_xfer_shared_libraries (ops, object, annex, |
391 | readbuf, writebuf, | |
9b409511 | 392 | offset, len, xfered_len); |
037a727e UW |
393 | case TARGET_OBJECT_MEMORY: |
394 | { | |
395 | union | |
7a78ae4e | 396 | { |
037a727e UW |
397 | PTRACE_TYPE_RET word; |
398 | gdb_byte byte[sizeof (PTRACE_TYPE_RET)]; | |
399 | } buffer; | |
400 | ULONGEST rounded_offset; | |
401 | LONGEST partial_len; | |
402 | ||
403 | /* Round the start offset down to the next long word | |
404 | boundary. */ | |
405 | rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET); | |
406 | ||
407 | /* Since ptrace will transfer a single word starting at that | |
408 | rounded_offset the partial_len needs to be adjusted down to | |
409 | that (remember this function only does a single transfer). | |
410 | Should the required length be even less, adjust it down | |
411 | again. */ | |
412 | partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset; | |
413 | if (partial_len > len) | |
414 | partial_len = len; | |
415 | ||
416 | if (writebuf) | |
417 | { | |
418 | /* If OFFSET:PARTIAL_LEN is smaller than | |
419 | ROUNDED_OFFSET:WORDSIZE then a read/modify write will | |
420 | be needed. Read in the entire word. */ | |
421 | if (rounded_offset < offset | |
422 | || (offset + partial_len | |
423 | < rounded_offset + sizeof (PTRACE_TYPE_RET))) | |
424 | { | |
425 | /* Need part of initial word -- fetch it. */ | |
426 | if (arch64) | |
427 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
428 | rounded_offset, 0, NULL); | |
429 | else | |
430 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
0df8b418 MS |
431 | (int *) (uintptr_t) |
432 | rounded_offset, | |
037a727e UW |
433 | 0, NULL); |
434 | } | |
435 | ||
436 | /* Copy data to be written over corresponding part of | |
437 | buffer. */ | |
438 | memcpy (buffer.byte + (offset - rounded_offset), | |
439 | writebuf, partial_len); | |
440 | ||
441 | errno = 0; | |
442 | if (arch64) | |
443 | rs6000_ptrace64 (PT_WRITE_D, pid, | |
444 | rounded_offset, buffer.word, NULL); | |
445 | else | |
446 | rs6000_ptrace32 (PT_WRITE_D, pid, | |
0df8b418 MS |
447 | (int *) (uintptr_t) rounded_offset, |
448 | buffer.word, NULL); | |
037a727e | 449 | if (errno) |
9b409511 | 450 | return TARGET_XFER_EOF; |
037a727e UW |
451 | } |
452 | ||
453 | if (readbuf) | |
454 | { | |
455 | errno = 0; | |
456 | if (arch64) | |
457 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
458 | rounded_offset, 0, NULL); | |
459 | else | |
460 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
461 | (int *)(uintptr_t)rounded_offset, | |
462 | 0, NULL); | |
463 | if (errno) | |
9b409511 | 464 | return TARGET_XFER_EOF; |
037a727e UW |
465 | |
466 | /* Copy appropriate bytes out of the buffer. */ | |
467 | memcpy (readbuf, buffer.byte + (offset - rounded_offset), | |
468 | partial_len); | |
469 | } | |
470 | ||
9b409511 YQ |
471 | *xfered_len = (ULONGEST) partial_len; |
472 | return TARGET_XFER_OK; | |
037a727e UW |
473 | } |
474 | ||
475 | default: | |
2ed4b548 | 476 | return TARGET_XFER_E_IO; |
7a78ae4e | 477 | } |
c906108c SS |
478 | } |
479 | ||
482f7fee UW |
480 | /* Wait for the child specified by PTID to do something. Return the |
481 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
482 | the status in *OURSTATUS. */ | |
483 | ||
484 | static ptid_t | |
117de6a9 | 485 | rs6000_wait (struct target_ops *ops, |
47608cb1 | 486 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
482f7fee UW |
487 | { |
488 | pid_t pid; | |
489 | int status, save_errno; | |
490 | ||
491 | do | |
492 | { | |
493 | set_sigint_trap (); | |
482f7fee UW |
494 | |
495 | do | |
496 | { | |
497 | pid = waitpid (ptid_get_pid (ptid), &status, 0); | |
498 | save_errno = errno; | |
499 | } | |
500 | while (pid == -1 && errno == EINTR); | |
501 | ||
482f7fee UW |
502 | clear_sigint_trap (); |
503 | ||
504 | if (pid == -1) | |
505 | { | |
506 | fprintf_unfiltered (gdb_stderr, | |
507 | _("Child process unexpectedly missing: %s.\n"), | |
508 | safe_strerror (save_errno)); | |
509 | ||
510 | /* Claim it exited with unknown signal. */ | |
511 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 512 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 513 | return inferior_ptid; |
482f7fee UW |
514 | } |
515 | ||
516 | /* Ignore terminated detached child processes. */ | |
517 | if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid)) | |
518 | pid = -1; | |
519 | } | |
520 | while (pid == -1); | |
521 | ||
522 | /* AIX has a couple of strange returns from wait(). */ | |
523 | ||
524 | /* stop after load" status. */ | |
525 | if (status == 0x57c) | |
526 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
0df8b418 | 527 | /* signal 0. I have no idea why wait(2) returns with this status word. */ |
482f7fee UW |
528 | else if (status == 0x7f) |
529 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
530 | /* A normal waitstatus. Let the usual macros deal with it. */ | |
531 | else | |
532 | store_waitstatus (ourstatus, status); | |
533 | ||
534 | return pid_to_ptid (pid); | |
535 | } | |
037a727e | 536 | |
c906108c SS |
537 | /* Execute one dummy breakpoint instruction. This way we give the kernel |
538 | a chance to do some housekeeping and update inferior's internal data, | |
0df8b418 | 539 | including u_area. */ |
c906108c SS |
540 | |
541 | static void | |
fb14de7b | 542 | exec_one_dummy_insn (struct regcache *regcache) |
c906108c | 543 | { |
4a7622d1 | 544 | #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 |
c906108c | 545 | |
a6d9a66e | 546 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 547 | int ret, status, pid; |
c906108c | 548 | CORE_ADDR prev_pc; |
8181d85f | 549 | void *bp; |
c906108c | 550 | |
0df8b418 | 551 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We |
c906108c | 552 | assume that this address will never be executed again by the real |
0df8b418 | 553 | code. */ |
c906108c | 554 | |
47607d6f | 555 | bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR); |
c906108c | 556 | |
c906108c SS |
557 | /* You might think this could be done with a single ptrace call, and |
558 | you'd be correct for just about every platform I've ever worked | |
559 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
560 | the inferior never hits the breakpoint (it's also worth noting | |
561 | powerpc-ibm-aix4.1.3 works correctly). */ | |
fb14de7b UW |
562 | prev_pc = regcache_read_pc (regcache); |
563 | regcache_write_pc (regcache, DUMMY_INSN_ADDR); | |
7a78ae4e | 564 | if (ARCH64 ()) |
dfd4cc63 LM |
565 | ret = rs6000_ptrace64 (PT_CONTINUE, ptid_get_pid (inferior_ptid), |
566 | 1, 0, NULL); | |
7a78ae4e | 567 | else |
dfd4cc63 | 568 | ret = rs6000_ptrace32 (PT_CONTINUE, ptid_get_pid (inferior_ptid), |
0df8b418 | 569 | (int *) 1, 0, NULL); |
c906108c | 570 | |
7a78ae4e | 571 | if (ret != 0) |
9b20d036 | 572 | perror (_("pt_continue")); |
c906108c | 573 | |
c5aa993b JM |
574 | do |
575 | { | |
dfd4cc63 | 576 | pid = waitpid (ptid_get_pid (inferior_ptid), &status, 0); |
c5aa993b | 577 | } |
dfd4cc63 | 578 | while (pid != ptid_get_pid (inferior_ptid)); |
c5aa993b | 579 | |
fb14de7b | 580 | regcache_write_pc (regcache, prev_pc); |
a6d9a66e | 581 | deprecated_remove_raw_breakpoint (gdbarch, bp); |
c906108c | 582 | } |
c906108c | 583 | \f |
7a78ae4e | 584 | |
7a78ae4e | 585 | /* Set the current architecture from the host running GDB. Called when |
0df8b418 | 586 | starting a child process. */ |
7a78ae4e | 587 | |
136d6dae VP |
588 | static void (*super_create_inferior) (struct target_ops *,char *exec_file, |
589 | char *allargs, char **env, int from_tty); | |
1f480a5e | 590 | static void |
136d6dae VP |
591 | rs6000_create_inferior (struct target_ops * ops, char *exec_file, |
592 | char *allargs, char **env, int from_tty) | |
7a78ae4e ND |
593 | { |
594 | enum bfd_architecture arch; | |
595 | unsigned long mach; | |
596 | bfd abfd; | |
597 | struct gdbarch_info info; | |
598 | ||
136d6dae | 599 | super_create_inferior (ops, exec_file, allargs, env, from_tty); |
1f480a5e | 600 | |
7a78ae4e ND |
601 | if (__power_rs ()) |
602 | { | |
603 | arch = bfd_arch_rs6000; | |
604 | mach = bfd_mach_rs6k; | |
605 | } | |
606 | else | |
607 | { | |
608 | arch = bfd_arch_powerpc; | |
609 | mach = bfd_mach_ppc; | |
610 | } | |
19caaa45 PS |
611 | |
612 | /* FIXME: schauer/2002-02-25: | |
613 | We don't know if we are executing a 32 or 64 bit executable, | |
614 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
615 | So we have to avoid switching to a new architecture, if the architecture | |
616 | matches already. | |
617 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
618 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
619 | determine the wordsize. */ | |
620 | if (exec_bfd) | |
621 | { | |
622 | const struct bfd_arch_info *exec_bfd_arch_info; | |
623 | ||
624 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
625 | if (arch == exec_bfd_arch_info->arch) | |
626 | return; | |
627 | } | |
628 | ||
7a78ae4e ND |
629 | bfd_default_set_arch_mach (&abfd, arch, mach); |
630 | ||
fb6ecb0f | 631 | gdbarch_info_init (&info); |
7a78ae4e | 632 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 633 | info.abfd = exec_bfd; |
7a78ae4e | 634 | |
16f33e29 | 635 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 636 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
637 | _("rs6000_create_inferior: failed " |
638 | "to select architecture")); | |
7a78ae4e | 639 | } |
c906108c | 640 | \f |
c906108c | 641 | |
4d1eb6b4 | 642 | /* Shared Object support. */ |
c906108c | 643 | |
4d1eb6b4 JB |
644 | /* Return the LdInfo data for the given process. Raises an error |
645 | if the data could not be obtained. | |
8d08c9ce | 646 | |
4d1eb6b4 | 647 | The returned value must be deallocated after use. */ |
c906108c | 648 | |
356a5233 | 649 | static gdb_byte * |
4d1eb6b4 JB |
650 | rs6000_ptrace_ldinfo (ptid_t ptid) |
651 | { | |
652 | const int pid = ptid_get_pid (ptid); | |
653 | int ldi_size = 1024; | |
356a5233 | 654 | gdb_byte *ldi = xmalloc (ldi_size); |
4d1eb6b4 | 655 | int rc = -1; |
7a78ae4e | 656 | |
4d1eb6b4 JB |
657 | while (1) |
658 | { | |
659 | if (ARCH64 ()) | |
660 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, ldi_size, | |
661 | NULL); | |
c18e0d23 | 662 | else |
4d1eb6b4 JB |
663 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, ldi_size, NULL); |
664 | ||
665 | if (rc != -1) | |
666 | break; /* Success, we got the entire ld_info data. */ | |
667 | ||
668 | if (errno != ENOMEM) | |
669 | perror_with_name (_("ptrace ldinfo")); | |
670 | ||
671 | /* ldi is not big enough. Double it and try again. */ | |
672 | ldi_size *= 2; | |
673 | ldi = xrealloc (ldi, ldi_size); | |
674 | } | |
675 | ||
676 | return ldi; | |
c906108c | 677 | } |
c906108c | 678 | |
4d1eb6b4 | 679 | /* Implement the to_xfer_partial target_ops method for |
ff99b71b | 680 | TARGET_OBJECT_LIBRARIES_AIX objects. */ |
6426a772 | 681 | |
9b409511 | 682 | static enum target_xfer_status |
4d1eb6b4 JB |
683 | rs6000_xfer_shared_libraries |
684 | (struct target_ops *ops, enum target_object object, | |
685 | const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 686 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
4d1eb6b4 | 687 | { |
356a5233 JB |
688 | gdb_byte *ldi_buf; |
689 | ULONGEST result; | |
690 | struct cleanup *cleanup; | |
691 | ||
692 | /* This function assumes that it is being run with a live process. | |
693 | Core files are handled via gdbarch. */ | |
694 | gdb_assert (target_has_execution); | |
c906108c | 695 | |
4d1eb6b4 | 696 | if (writebuf) |
2ed4b548 | 697 | return TARGET_XFER_E_IO; |
c5aa993b | 698 | |
356a5233 JB |
699 | ldi_buf = rs6000_ptrace_ldinfo (inferior_ptid); |
700 | gdb_assert (ldi_buf != NULL); | |
701 | cleanup = make_cleanup (xfree, ldi_buf); | |
702 | result = rs6000_aix_ld_info_to_xml (target_gdbarch (), ldi_buf, | |
703 | readbuf, offset, len, 1); | |
704 | xfree (ldi_buf); | |
4d1eb6b4 | 705 | |
356a5233 | 706 | do_cleanups (cleanup); |
9b409511 YQ |
707 | |
708 | if (result == 0) | |
709 | return TARGET_XFER_EOF; | |
710 | else | |
711 | { | |
712 | *xfered_len = result; | |
713 | return TARGET_XFER_OK; | |
714 | } | |
c906108c | 715 | } |
c906108c | 716 | |
e1aca11e JB |
717 | void _initialize_rs6000_nat (void); |
718 | ||
c906108c | 719 | void |
7a61a01c | 720 | _initialize_rs6000_nat (void) |
c906108c | 721 | { |
037a727e UW |
722 | struct target_ops *t; |
723 | ||
724 | t = inf_ptrace_target (); | |
725 | t->to_fetch_registers = rs6000_fetch_inferior_registers; | |
726 | t->to_store_registers = rs6000_store_inferior_registers; | |
727 | t->to_xfer_partial = rs6000_xfer_partial; | |
1f480a5e UW |
728 | |
729 | super_create_inferior = t->to_create_inferior; | |
730 | t->to_create_inferior = rs6000_create_inferior; | |
731 | ||
482f7fee UW |
732 | t->to_wait = rs6000_wait; |
733 | ||
037a727e | 734 | add_target (t); |
c906108c | 735 | } |