Commit | Line | Data |
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c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d | 2 | |
28e7fd62 | 3 | Copyright (C) 1986-2013 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" | |
24 | #include "xcoffsolib.h" | |
25 | #include "symfile.h" | |
26 | #include "objfiles.h" | |
42203e46 | 27 | #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ |
c906108c | 28 | #include "bfd.h" |
60250e8b | 29 | #include "exceptions.h" |
c906108c | 30 | #include "gdb-stabs.h" |
4e052eda | 31 | #include "regcache.h" |
19caaa45 | 32 | #include "arch-utils.h" |
dab06dbe | 33 | #include "inf-child.h" |
037a727e | 34 | #include "inf-ptrace.h" |
11bf77db | 35 | #include "ppc-tdep.h" |
6f7f3f0d | 36 | #include "rs6000-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 | ||
44 | #include <sys/param.h> | |
45 | #include <sys/dir.h> | |
46 | #include <sys/user.h> | |
47 | #include <signal.h> | |
48 | #include <sys/ioctl.h> | |
49 | #include <fcntl.h> | |
7a78ae4e | 50 | #include <errno.h> |
c906108c SS |
51 | |
52 | #include <a.out.h> | |
53 | #include <sys/file.h> | |
54 | #include "gdb_stat.h" | |
92107356 | 55 | #include "gdb_bfd.h" |
c906108c | 56 | #include <sys/core.h> |
7a78ae4e ND |
57 | #define __LDINFO_PTRACE32__ /* for __ld_info32 */ |
58 | #define __LDINFO_PTRACE64__ /* for __ld_info64 */ | |
c906108c | 59 | #include <sys/ldr.h> |
7a78ae4e | 60 | #include <sys/systemcfg.h> |
c906108c | 61 | |
7a78ae4e ND |
62 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
63 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
0df8b418 | 64 | accessing fields in the appropriate structures. */ |
7a78ae4e ND |
65 | |
66 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
0df8b418 | 67 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ |
7a78ae4e ND |
68 | |
69 | #ifdef __ld_info32 | |
70 | # define ARCH3264 | |
71 | #endif | |
72 | ||
0df8b418 | 73 | /* Return whether the current architecture is 64-bit. */ |
7a78ae4e ND |
74 | |
75 | #ifndef ARCH3264 | |
76 | # define ARCH64() 0 | |
77 | #else | |
f5656ead | 78 | # define ARCH64() (register_size (target_gdbarch (), 0) == 8) |
7a78ae4e ND |
79 | #endif |
80 | ||
0df8b418 | 81 | /* Union of 32-bit and 64-bit versions of ld_info. */ |
7a78ae4e ND |
82 | |
83 | typedef union { | |
84 | #ifndef ARCH3264 | |
85 | struct ld_info l32; | |
86 | struct ld_info l64; | |
87 | #else | |
88 | struct __ld_info32 l32; | |
89 | struct __ld_info64 l64; | |
90 | #endif | |
91 | } LdInfo; | |
92 | ||
93 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
94 | declare and initialize a variable named VAR suitable for use as the arch64 | |
0df8b418 | 95 | parameter to the various LDI_*() macros. */ |
7a78ae4e ND |
96 | |
97 | #ifndef ARCH3264 | |
98 | # define ARCH64_DECL(var) | |
99 | #else | |
100 | # define ARCH64_DECL(var) int var = ARCH64 () | |
101 | #endif | |
102 | ||
103 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
104 | otherwise. This technique only works for FIELDs with the same data type in | |
0df8b418 | 105 | 32-bit and 64-bit versions of ld_info. */ |
7a78ae4e ND |
106 | |
107 | #ifndef ARCH3264 | |
108 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
109 | #else | |
110 | # define LDI_FIELD(ldi, arch64, field) \ | |
111 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
112 | #endif | |
113 | ||
114 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
0df8b418 | 115 | process otherwise. */ |
7a78ae4e ND |
116 | |
117 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
118 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
119 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 120 | |
a14ed312 | 121 | extern struct vmap *map_vmap (bfd * bf, bfd * arch); |
c906108c | 122 | |
a14ed312 | 123 | static void vmap_exec (void); |
c906108c | 124 | |
7a78ae4e | 125 | static void vmap_ldinfo (LdInfo *); |
c906108c | 126 | |
7a78ae4e | 127 | static struct vmap *add_vmap (LdInfo *); |
c906108c | 128 | |
7a78ae4e | 129 | static int objfile_symbol_add (void *); |
c906108c | 130 | |
a14ed312 | 131 | static void vmap_symtab (struct vmap *); |
c906108c | 132 | |
fb14de7b | 133 | static void exec_one_dummy_insn (struct regcache *); |
c906108c | 134 | |
dd7be90a KB |
135 | /* Given REGNO, a gdb register number, return the corresponding |
136 | number suitable for use as a ptrace() parameter. Return -1 if | |
137 | there's no suitable mapping. Also, set the int pointed to by | |
138 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 139 | |
dd7be90a | 140 | static int |
206988c4 | 141 | regmap (struct gdbarch *gdbarch, int regno, int *isfloat) |
c5aa993b | 142 | { |
206988c4 | 143 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
144 | |
145 | *isfloat = 0; | |
8bf659e8 JB |
146 | if (tdep->ppc_gp0_regnum <= regno |
147 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 148 | return regno; |
383f0f5b JB |
149 | else if (tdep->ppc_fp0_regnum >= 0 |
150 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 151 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
152 | { |
153 | *isfloat = 1; | |
366f009f | 154 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a | 155 | } |
206988c4 | 156 | else if (regno == gdbarch_pc_regnum (gdbarch)) |
dd7be90a KB |
157 | return IAR; |
158 | else if (regno == tdep->ppc_ps_regnum) | |
159 | return MSR; | |
160 | else if (regno == tdep->ppc_cr_regnum) | |
161 | return CR; | |
162 | else if (regno == tdep->ppc_lr_regnum) | |
163 | return LR; | |
164 | else if (regno == tdep->ppc_ctr_regnum) | |
165 | return CTR; | |
166 | else if (regno == tdep->ppc_xer_regnum) | |
167 | return XER; | |
383f0f5b JB |
168 | else if (tdep->ppc_fpscr_regnum >= 0 |
169 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 170 | return FPSCR; |
dd7be90a KB |
171 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
172 | return MQ; | |
173 | else | |
174 | return -1; | |
175 | } | |
c906108c | 176 | |
0df8b418 | 177 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 178 | |
7a78ae4e | 179 | static int |
8b5790f2 | 180 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
181 | { |
182 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
183 | #if 0 | |
8b5790f2 | 184 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
185 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
186 | #endif | |
187 | return ret; | |
188 | } | |
c906108c | 189 | |
0df8b418 | 190 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 191 | |
7a78ae4e | 192 | static int |
0d16ee5d | 193 | rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) |
7a78ae4e ND |
194 | { |
195 | #ifdef ARCH3264 | |
196 | int ret = ptracex (req, id, addr, data, buf); | |
197 | #else | |
198 | int ret = 0; | |
199 | #endif | |
200 | #if 0 | |
2244ba2e PM |
201 | printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n", |
202 | req, id, hex_string (addr), data, (unsigned int)buf, ret); | |
7a78ae4e ND |
203 | #endif |
204 | return ret; | |
205 | } | |
c906108c | 206 | |
0df8b418 | 207 | /* Fetch register REGNO from the inferior. */ |
c906108c | 208 | |
7a78ae4e | 209 | static void |
56be3814 | 210 | fetch_register (struct regcache *regcache, int regno) |
7a78ae4e | 211 | { |
8b164abb | 212 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 213 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 214 | int nr, isfloat; |
c906108c | 215 | |
0df8b418 | 216 | /* Retrieved values may be -1, so infer errors from errno. */ |
7a78ae4e | 217 | errno = 0; |
c906108c | 218 | |
206988c4 | 219 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 220 | |
0df8b418 | 221 | /* Floating-point registers. */ |
dd7be90a KB |
222 | if (isfloat) |
223 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 224 | |
0df8b418 | 225 | /* Bogus register number. */ |
dd7be90a | 226 | else if (nr < 0) |
2a18e3d9 | 227 | { |
8b164abb | 228 | if (regno >= gdbarch_num_regs (gdbarch)) |
2a18e3d9 EZ |
229 | fprintf_unfiltered (gdb_stderr, |
230 | "gdb error: register no %d not implemented.\n", | |
231 | regno); | |
dd7be90a | 232 | return; |
2a18e3d9 | 233 | } |
c906108c | 234 | |
0df8b418 | 235 | /* Fixed-point registers. */ |
7a78ae4e ND |
236 | else |
237 | { | |
7a78ae4e | 238 | if (!ARCH64 ()) |
0df8b418 MS |
239 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), |
240 | (int *) nr, 0, 0); | |
7a78ae4e ND |
241 | else |
242 | { | |
243 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
0df8b418 | 244 | even if the register is really only 32 bits. */ |
7a78ae4e | 245 | long long buf; |
0d16ee5d | 246 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
8b164abb | 247 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
248 | memcpy (addr, &buf, 8); |
249 | else | |
250 | *addr = buf; | |
251 | } | |
252 | } | |
253 | ||
254 | if (!errno) | |
56be3814 | 255 | regcache_raw_supply (regcache, regno, (char *) addr); |
7a78ae4e ND |
256 | else |
257 | { | |
258 | #if 0 | |
0df8b418 | 259 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ |
9b20d036 | 260 | perror (_("ptrace read")); |
7a78ae4e ND |
261 | #endif |
262 | errno = 0; | |
263 | } | |
c906108c SS |
264 | } |
265 | ||
0df8b418 | 266 | /* Store register REGNO back into the inferior. */ |
c906108c | 267 | |
7a78ae4e | 268 | static void |
fb14de7b | 269 | store_register (struct regcache *regcache, int regno) |
c906108c | 270 | { |
8b164abb | 271 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 272 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 273 | int nr, isfloat; |
c906108c | 274 | |
11bf77db | 275 | /* Fetch the register's value from the register cache. */ |
56be3814 | 276 | regcache_raw_collect (regcache, regno, addr); |
11bf77db | 277 | |
0df8b418 | 278 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
279 | errno = 0; |
280 | ||
206988c4 | 281 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 282 | |
0df8b418 | 283 | /* Floating-point registers. */ |
dd7be90a KB |
284 | if (isfloat) |
285 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 286 | |
0df8b418 | 287 | /* Bogus register number. */ |
dd7be90a | 288 | else if (nr < 0) |
7a78ae4e | 289 | { |
8b164abb | 290 | if (regno >= gdbarch_num_regs (gdbarch)) |
7a78ae4e ND |
291 | fprintf_unfiltered (gdb_stderr, |
292 | "gdb error: register no %d not implemented.\n", | |
293 | regno); | |
294 | } | |
c906108c | 295 | |
0df8b418 | 296 | /* Fixed-point registers. */ |
7a78ae4e ND |
297 | else |
298 | { | |
8b164abb | 299 | if (regno == gdbarch_sp_regnum (gdbarch)) |
7a78ae4e ND |
300 | /* Execute one dummy instruction (which is a breakpoint) in inferior |
301 | process to give kernel a chance to do internal housekeeping. | |
302 | Otherwise the following ptrace(2) calls will mess up user stack | |
303 | since kernel will get confused about the bottom of the stack | |
0df8b418 | 304 | (%sp). */ |
fb14de7b | 305 | exec_one_dummy_insn (regcache); |
c906108c | 306 | |
11bf77db KB |
307 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
308 | the register's value is passed by value, but for 64-bit inferiors, | |
309 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 310 | if (!ARCH64 ()) |
0df8b418 MS |
311 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), |
312 | (int *) nr, *addr, 0); | |
7a78ae4e | 313 | else |
c906108c | 314 | { |
7a78ae4e | 315 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
0df8b418 | 316 | area, even if the register is really only 32 bits. */ |
7a78ae4e | 317 | long long buf; |
8b164abb | 318 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
319 | memcpy (&buf, addr, 8); |
320 | else | |
321 | buf = *addr; | |
0d16ee5d | 322 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
c906108c SS |
323 | } |
324 | } | |
325 | ||
7a78ae4e | 326 | if (errno) |
c906108c | 327 | { |
9b20d036 | 328 | perror (_("ptrace write")); |
7a78ae4e | 329 | errno = 0; |
c906108c | 330 | } |
7a78ae4e | 331 | } |
c906108c | 332 | |
7a78ae4e | 333 | /* Read from the inferior all registers if REGNO == -1 and just register |
0df8b418 | 334 | REGNO otherwise. */ |
c906108c | 335 | |
037a727e | 336 | static void |
28439f5e PA |
337 | rs6000_fetch_inferior_registers (struct target_ops *ops, |
338 | struct regcache *regcache, int regno) | |
7a78ae4e | 339 | { |
8b164abb | 340 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 341 | if (regno != -1) |
56be3814 | 342 | fetch_register (regcache, regno); |
7a78ae4e ND |
343 | |
344 | else | |
c906108c | 345 | { |
8b164abb | 346 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e | 347 | |
dd7be90a KB |
348 | /* Read 32 general purpose registers. */ |
349 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 350 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
351 | regno++) |
352 | { | |
56be3814 | 353 | fetch_register (regcache, regno); |
dd7be90a KB |
354 | } |
355 | ||
356 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
357 | if (tdep->ppc_fp0_regnum >= 0) |
358 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 359 | fetch_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 360 | |
dd7be90a | 361 | /* Read special registers. */ |
8b164abb | 362 | fetch_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
363 | fetch_register (regcache, tdep->ppc_ps_regnum); |
364 | fetch_register (regcache, tdep->ppc_cr_regnum); | |
365 | fetch_register (regcache, tdep->ppc_lr_regnum); | |
366 | fetch_register (regcache, tdep->ppc_ctr_regnum); | |
367 | fetch_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 368 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 369 | fetch_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 370 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 371 | fetch_register (regcache, tdep->ppc_mq_regnum); |
c906108c | 372 | } |
7a78ae4e | 373 | } |
c906108c | 374 | |
7a78ae4e ND |
375 | /* Store our register values back into the inferior. |
376 | If REGNO is -1, do this for all registers. | |
377 | Otherwise, REGNO specifies which register (so we can save time). */ | |
378 | ||
037a727e | 379 | static void |
28439f5e PA |
380 | rs6000_store_inferior_registers (struct target_ops *ops, |
381 | struct regcache *regcache, int regno) | |
7a78ae4e | 382 | { |
8b164abb | 383 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 384 | if (regno != -1) |
56be3814 | 385 | store_register (regcache, regno); |
7a78ae4e ND |
386 | |
387 | else | |
f6077098 | 388 | { |
8b164abb | 389 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
390 | |
391 | /* Write general purpose registers first. */ | |
392 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 393 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
394 | regno++) |
395 | { | |
56be3814 | 396 | store_register (regcache, regno); |
dd7be90a | 397 | } |
7a78ae4e | 398 | |
dd7be90a | 399 | /* Write floating point registers. */ |
383f0f5b JB |
400 | if (tdep->ppc_fp0_regnum >= 0) |
401 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 402 | store_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 403 | |
dd7be90a | 404 | /* Write special registers. */ |
8b164abb | 405 | store_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
406 | store_register (regcache, tdep->ppc_ps_regnum); |
407 | store_register (regcache, tdep->ppc_cr_regnum); | |
408 | store_register (regcache, tdep->ppc_lr_regnum); | |
409 | store_register (regcache, tdep->ppc_ctr_regnum); | |
410 | store_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 411 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 412 | store_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 413 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 414 | store_register (regcache, tdep->ppc_mq_regnum); |
f6077098 | 415 | } |
7a78ae4e | 416 | } |
f6077098 | 417 | |
7a78ae4e | 418 | |
037a727e UW |
419 | /* Attempt a transfer all LEN bytes starting at OFFSET between the |
420 | inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. | |
421 | Return the number of bytes actually transferred. */ | |
7a78ae4e | 422 | |
037a727e UW |
423 | static LONGEST |
424 | rs6000_xfer_partial (struct target_ops *ops, enum target_object object, | |
425 | const char *annex, gdb_byte *readbuf, | |
426 | const gdb_byte *writebuf, | |
427 | ULONGEST offset, LONGEST len) | |
7a78ae4e | 428 | { |
037a727e | 429 | pid_t pid = ptid_get_pid (inferior_ptid); |
7a78ae4e | 430 | int arch64 = ARCH64 (); |
7a78ae4e | 431 | |
037a727e | 432 | switch (object) |
c906108c | 433 | { |
037a727e UW |
434 | case TARGET_OBJECT_MEMORY: |
435 | { | |
436 | union | |
7a78ae4e | 437 | { |
037a727e UW |
438 | PTRACE_TYPE_RET word; |
439 | gdb_byte byte[sizeof (PTRACE_TYPE_RET)]; | |
440 | } buffer; | |
441 | ULONGEST rounded_offset; | |
442 | LONGEST partial_len; | |
443 | ||
444 | /* Round the start offset down to the next long word | |
445 | boundary. */ | |
446 | rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET); | |
447 | ||
448 | /* Since ptrace will transfer a single word starting at that | |
449 | rounded_offset the partial_len needs to be adjusted down to | |
450 | that (remember this function only does a single transfer). | |
451 | Should the required length be even less, adjust it down | |
452 | again. */ | |
453 | partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset; | |
454 | if (partial_len > len) | |
455 | partial_len = len; | |
456 | ||
457 | if (writebuf) | |
458 | { | |
459 | /* If OFFSET:PARTIAL_LEN is smaller than | |
460 | ROUNDED_OFFSET:WORDSIZE then a read/modify write will | |
461 | be needed. Read in the entire word. */ | |
462 | if (rounded_offset < offset | |
463 | || (offset + partial_len | |
464 | < rounded_offset + sizeof (PTRACE_TYPE_RET))) | |
465 | { | |
466 | /* Need part of initial word -- fetch it. */ | |
467 | if (arch64) | |
468 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
469 | rounded_offset, 0, NULL); | |
470 | else | |
471 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
0df8b418 MS |
472 | (int *) (uintptr_t) |
473 | rounded_offset, | |
037a727e UW |
474 | 0, NULL); |
475 | } | |
476 | ||
477 | /* Copy data to be written over corresponding part of | |
478 | buffer. */ | |
479 | memcpy (buffer.byte + (offset - rounded_offset), | |
480 | writebuf, partial_len); | |
481 | ||
482 | errno = 0; | |
483 | if (arch64) | |
484 | rs6000_ptrace64 (PT_WRITE_D, pid, | |
485 | rounded_offset, buffer.word, NULL); | |
486 | else | |
487 | rs6000_ptrace32 (PT_WRITE_D, pid, | |
0df8b418 MS |
488 | (int *) (uintptr_t) rounded_offset, |
489 | buffer.word, NULL); | |
037a727e UW |
490 | if (errno) |
491 | return 0; | |
492 | } | |
493 | ||
494 | if (readbuf) | |
495 | { | |
496 | errno = 0; | |
497 | if (arch64) | |
498 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
499 | rounded_offset, 0, NULL); | |
500 | else | |
501 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
502 | (int *)(uintptr_t)rounded_offset, | |
503 | 0, NULL); | |
504 | if (errno) | |
505 | return 0; | |
506 | ||
507 | /* Copy appropriate bytes out of the buffer. */ | |
508 | memcpy (readbuf, buffer.byte + (offset - rounded_offset), | |
509 | partial_len); | |
510 | } | |
511 | ||
512 | return partial_len; | |
513 | } | |
514 | ||
515 | default: | |
516 | return -1; | |
7a78ae4e | 517 | } |
c906108c SS |
518 | } |
519 | ||
482f7fee UW |
520 | /* Wait for the child specified by PTID to do something. Return the |
521 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
522 | the status in *OURSTATUS. */ | |
523 | ||
524 | static ptid_t | |
117de6a9 | 525 | rs6000_wait (struct target_ops *ops, |
47608cb1 | 526 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
482f7fee UW |
527 | { |
528 | pid_t pid; | |
529 | int status, save_errno; | |
530 | ||
531 | do | |
532 | { | |
533 | set_sigint_trap (); | |
482f7fee UW |
534 | |
535 | do | |
536 | { | |
537 | pid = waitpid (ptid_get_pid (ptid), &status, 0); | |
538 | save_errno = errno; | |
539 | } | |
540 | while (pid == -1 && errno == EINTR); | |
541 | ||
482f7fee UW |
542 | clear_sigint_trap (); |
543 | ||
544 | if (pid == -1) | |
545 | { | |
546 | fprintf_unfiltered (gdb_stderr, | |
547 | _("Child process unexpectedly missing: %s.\n"), | |
548 | safe_strerror (save_errno)); | |
549 | ||
550 | /* Claim it exited with unknown signal. */ | |
551 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 552 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 553 | return inferior_ptid; |
482f7fee UW |
554 | } |
555 | ||
556 | /* Ignore terminated detached child processes. */ | |
557 | if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid)) | |
558 | pid = -1; | |
559 | } | |
560 | while (pid == -1); | |
561 | ||
562 | /* AIX has a couple of strange returns from wait(). */ | |
563 | ||
564 | /* stop after load" status. */ | |
565 | if (status == 0x57c) | |
566 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
0df8b418 | 567 | /* signal 0. I have no idea why wait(2) returns with this status word. */ |
482f7fee UW |
568 | else if (status == 0x7f) |
569 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
570 | /* A normal waitstatus. Let the usual macros deal with it. */ | |
571 | else | |
572 | store_waitstatus (ourstatus, status); | |
573 | ||
574 | return pid_to_ptid (pid); | |
575 | } | |
037a727e | 576 | |
c906108c SS |
577 | /* Execute one dummy breakpoint instruction. This way we give the kernel |
578 | a chance to do some housekeeping and update inferior's internal data, | |
0df8b418 | 579 | including u_area. */ |
c906108c SS |
580 | |
581 | static void | |
fb14de7b | 582 | exec_one_dummy_insn (struct regcache *regcache) |
c906108c | 583 | { |
4a7622d1 | 584 | #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 |
c906108c | 585 | |
a6d9a66e | 586 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 587 | int ret, status, pid; |
c906108c | 588 | CORE_ADDR prev_pc; |
8181d85f | 589 | void *bp; |
c906108c | 590 | |
0df8b418 | 591 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We |
c906108c | 592 | assume that this address will never be executed again by the real |
0df8b418 | 593 | code. */ |
c906108c | 594 | |
47607d6f | 595 | bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR); |
c906108c | 596 | |
c906108c SS |
597 | /* You might think this could be done with a single ptrace call, and |
598 | you'd be correct for just about every platform I've ever worked | |
599 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
600 | the inferior never hits the breakpoint (it's also worth noting | |
601 | powerpc-ibm-aix4.1.3 works correctly). */ | |
fb14de7b UW |
602 | prev_pc = regcache_read_pc (regcache); |
603 | regcache_write_pc (regcache, DUMMY_INSN_ADDR); | |
7a78ae4e | 604 | if (ARCH64 ()) |
8b5790f2 | 605 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 606 | else |
0df8b418 MS |
607 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), |
608 | (int *) 1, 0, NULL); | |
c906108c | 609 | |
7a78ae4e | 610 | if (ret != 0) |
9b20d036 | 611 | perror (_("pt_continue")); |
c906108c | 612 | |
c5aa993b JM |
613 | do |
614 | { | |
5be4dfca | 615 | pid = waitpid (PIDGET (inferior_ptid), &status, 0); |
c5aa993b | 616 | } |
39f77062 | 617 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 618 | |
fb14de7b | 619 | regcache_write_pc (regcache, prev_pc); |
a6d9a66e | 620 | deprecated_remove_raw_breakpoint (gdbarch, bp); |
c906108c | 621 | } |
c906108c | 622 | \f |
7a78ae4e ND |
623 | |
624 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
0df8b418 | 625 | process if ARCH64 and for a 32-bit process otherwise. */ |
7a78ae4e ND |
626 | |
627 | static void | |
628 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
629 | { | |
630 | if (arch64) | |
631 | { | |
632 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
633 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
634 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
635 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
636 | } | |
637 | else | |
638 | { | |
639 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
640 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
641 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
642 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
643 | } | |
644 | ||
645 | /* The run time loader maps the file header in addition to the text | |
646 | section and returns a pointer to the header in ldinfo_textorg. | |
647 | Adjust the text start address to point to the real start address | |
648 | of the text section. */ | |
649 | vp->tstart += vp->toffs; | |
650 | } | |
651 | ||
8333c85b JB |
652 | /* If the .bss section's VMA is set to an address located before |
653 | the end of the .data section, causing the two sections to overlap, | |
654 | return the overlap in bytes. Otherwise, return zero. | |
655 | ||
656 | Motivation: | |
657 | ||
658 | The GNU linker sometimes sets the start address of the .bss session | |
659 | before the end of the .data section, making the 2 sections overlap. | |
660 | The loader appears to handle this situation gracefully, by simply | |
661 | loading the bss section right after the end of the .data section. | |
662 | ||
663 | This means that the .data and the .bss sections are sometimes | |
664 | no longer relocated by the same amount. The problem is that | |
665 | the ldinfo data does not contain any information regarding | |
666 | the relocation of the .bss section, assuming that it would be | |
667 | identical to the information provided for the .data section | |
668 | (this is what would normally happen if the program was linked | |
669 | correctly). | |
670 | ||
671 | GDB therefore needs to detect those cases, and make the corresponding | |
672 | adjustment to the .bss section offset computed from the ldinfo data | |
673 | when necessary. This function returns the adjustment amount (or | |
674 | zero when no adjustment is needed). */ | |
675 | ||
676 | static CORE_ADDR | |
677 | bss_data_overlap (struct objfile *objfile) | |
678 | { | |
679 | struct obj_section *osect; | |
680 | struct bfd_section *data = NULL; | |
681 | struct bfd_section *bss = NULL; | |
682 | ||
683 | /* First, find the .data and .bss sections. */ | |
684 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
685 | { | |
686 | if (strcmp (bfd_section_name (objfile->obfd, | |
687 | osect->the_bfd_section), | |
688 | ".data") == 0) | |
689 | data = osect->the_bfd_section; | |
690 | else if (strcmp (bfd_section_name (objfile->obfd, | |
691 | osect->the_bfd_section), | |
692 | ".bss") == 0) | |
693 | bss = osect->the_bfd_section; | |
694 | } | |
695 | ||
696 | /* If either section is not defined, there can be no overlap. */ | |
697 | if (data == NULL || bss == NULL) | |
698 | return 0; | |
699 | ||
700 | /* Assume the problem only occurs with linkers that place the .bss | |
701 | section after the .data section (the problem has only been | |
702 | observed when using the GNU linker, and the default linker | |
703 | script always places the .data and .bss sections in that order). */ | |
704 | if (bfd_section_vma (objfile->obfd, bss) | |
705 | < bfd_section_vma (objfile->obfd, data)) | |
706 | return 0; | |
707 | ||
708 | if (bfd_section_vma (objfile->obfd, bss) | |
709 | < bfd_section_vma (objfile->obfd, data) + bfd_get_section_size (data)) | |
710 | return ((bfd_section_vma (objfile->obfd, data) | |
711 | + bfd_get_section_size (data)) | |
712 | - bfd_section_vma (objfile->obfd, bss)); | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
0df8b418 | 717 | /* Handle symbol translation on vmapping. */ |
c906108c SS |
718 | |
719 | static void | |
7a78ae4e | 720 | vmap_symtab (struct vmap *vp) |
c906108c | 721 | { |
52f0bd74 | 722 | struct objfile *objfile; |
c906108c SS |
723 | struct section_offsets *new_offsets; |
724 | int i; | |
c5aa993b | 725 | |
c906108c SS |
726 | objfile = vp->objfile; |
727 | if (objfile == NULL) | |
728 | { | |
729 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
730 | Currently, that can only happen with the exec file, so |
731 | relocate the symbols for the symfile. */ | |
c906108c SS |
732 | if (symfile_objfile == NULL) |
733 | return; | |
734 | objfile = symfile_objfile; | |
735 | } | |
63f58cc5 | 736 | else if (!vp->loaded) |
0df8b418 | 737 | /* If symbols are not yet loaded, offsets are not yet valid. */ |
63f58cc5 | 738 | return; |
c906108c | 739 | |
9f83329d JB |
740 | new_offsets = |
741 | (struct section_offsets *) | |
742 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
c906108c SS |
743 | |
744 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 745 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 746 | |
c906108c SS |
747 | /* The symbols in the object file are linked to the VMA of the section, |
748 | relocate them VMA relative. */ | |
f0a58b0b EZ |
749 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
750 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
751 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c | 752 | |
8333c85b JB |
753 | /* Perform the same adjustment as the loader if the .data and |
754 | .bss sections overlap. */ | |
755 | new_offsets->offsets[SECT_OFF_BSS (objfile)] += bss_data_overlap (objfile); | |
756 | ||
c906108c SS |
757 | objfile_relocate (objfile, new_offsets); |
758 | } | |
759 | \f | |
760 | /* Add symbols for an objfile. */ | |
761 | ||
762 | static int | |
7a78ae4e | 763 | objfile_symbol_add (void *arg) |
c906108c SS |
764 | { |
765 | struct objfile *obj = (struct objfile *) arg; | |
766 | ||
7eedccfa PP |
767 | syms_from_objfile (obj, NULL, 0, 0, 0); |
768 | new_symfile_objfile (obj, 0); | |
c906108c SS |
769 | return 1; |
770 | } | |
771 | ||
63f58cc5 PS |
772 | /* Add symbols for a vmap. Return zero upon error. */ |
773 | ||
774 | int | |
775 | vmap_add_symbols (struct vmap *vp) | |
776 | { | |
777 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
778 | "Error while reading shared library symbols:\n", | |
779 | RETURN_MASK_ALL)) | |
780 | { | |
781 | /* Note this is only done if symbol reading was successful. */ | |
782 | vp->loaded = 1; | |
783 | vmap_symtab (vp); | |
784 | return 1; | |
785 | } | |
786 | return 0; | |
787 | } | |
788 | ||
c906108c SS |
789 | /* Add a new vmap entry based on ldinfo() information. |
790 | ||
791 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
792 | core file), the caller should set it to -1, and we will open the file. | |
793 | ||
794 | Return the vmap new entry. */ | |
795 | ||
796 | static struct vmap * | |
7a78ae4e | 797 | add_vmap (LdInfo *ldi) |
c906108c SS |
798 | { |
799 | bfd *abfd, *last; | |
a4453b7e | 800 | char *mem, *filename; |
c906108c SS |
801 | struct objfile *obj; |
802 | struct vmap *vp; | |
7a78ae4e ND |
803 | int fd; |
804 | ARCH64_DECL (arch64); | |
c906108c SS |
805 | |
806 | /* This ldi structure was allocated using alloca() in | |
0df8b418 MS |
807 | xcoff_relocate_symtab(). Now we need to have persistent object |
808 | and member names, so we should save them. */ | |
c906108c | 809 | |
7a78ae4e ND |
810 | filename = LDI_FILENAME (ldi, arch64); |
811 | mem = filename + strlen (filename) + 1; | |
1b36a34b | 812 | mem = xstrdup (mem); |
c906108c | 813 | |
7a78ae4e | 814 | fd = LDI_FD (ldi, arch64); |
1c00ec6b | 815 | abfd = gdb_bfd_open (filename, gnutarget, fd < 0 ? -1 : fd); |
c906108c | 816 | if (!abfd) |
63f58cc5 | 817 | { |
8a3fe4f8 | 818 | warning (_("Could not open `%s' as an executable file: %s"), |
a4453b7e | 819 | filename, bfd_errmsg (bfd_get_error ())); |
63f58cc5 PS |
820 | return NULL; |
821 | } | |
c906108c | 822 | |
0df8b418 | 823 | /* Make sure we have an object file. */ |
c906108c SS |
824 | |
825 | if (bfd_check_format (abfd, bfd_object)) | |
826 | vp = map_vmap (abfd, 0); | |
827 | ||
828 | else if (bfd_check_format (abfd, bfd_archive)) | |
829 | { | |
da1cc82f TT |
830 | last = gdb_bfd_openr_next_archived_file (abfd, NULL); |
831 | while (last != NULL) | |
520b0001 | 832 | { |
da1cc82f TT |
833 | bfd *next; |
834 | ||
520b0001 TT |
835 | if (strcmp (mem, last->filename) == 0) |
836 | break; | |
da1cc82f TT |
837 | |
838 | next = gdb_bfd_openr_next_archived_file (abfd, last); | |
839 | gdb_bfd_unref (last); | |
8f0ee2eb | 840 | last = next; |
520b0001 | 841 | } |
c906108c SS |
842 | |
843 | if (!last) | |
844 | { | |
a4453b7e | 845 | warning (_("\"%s\": member \"%s\" missing."), filename, mem); |
cbb099e8 | 846 | gdb_bfd_unref (abfd); |
63f58cc5 | 847 | return NULL; |
c906108c SS |
848 | } |
849 | ||
c5aa993b | 850 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 851 | { |
8a3fe4f8 | 852 | warning (_("\"%s\": member \"%s\" not in executable format: %s."), |
a4453b7e | 853 | filename, mem, bfd_errmsg (bfd_get_error ())); |
cbb099e8 TT |
854 | gdb_bfd_unref (last); |
855 | gdb_bfd_unref (abfd); | |
63f58cc5 | 856 | return NULL; |
c906108c SS |
857 | } |
858 | ||
859 | vp = map_vmap (last, abfd); | |
da1cc82f TT |
860 | /* map_vmap acquired a reference to LAST, so we can release |
861 | ours. */ | |
862 | gdb_bfd_unref (last); | |
c906108c SS |
863 | } |
864 | else | |
865 | { | |
8a3fe4f8 | 866 | warning (_("\"%s\": not in executable format: %s."), |
a4453b7e | 867 | filename, bfd_errmsg (bfd_get_error ())); |
cbb099e8 | 868 | gdb_bfd_unref (abfd); |
63f58cc5 | 869 | return NULL; |
c906108c | 870 | } |
520b0001 | 871 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
872 | vp->objfile = obj; |
873 | ||
63f58cc5 PS |
874 | /* Always add symbols for the main objfile. */ |
875 | if (vp == vmap || auto_solib_add) | |
876 | vmap_add_symbols (vp); | |
da1cc82f TT |
877 | |
878 | /* Anything needing a reference to ABFD has already acquired it, so | |
879 | release our local reference. */ | |
880 | gdb_bfd_unref (abfd); | |
881 | ||
c906108c SS |
882 | return vp; |
883 | } | |
884 | \f | |
885 | /* update VMAP info with ldinfo() information | |
886 | Input is ptr to ldinfo() results. */ | |
887 | ||
888 | static void | |
7a78ae4e | 889 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
890 | { |
891 | struct stat ii, vi; | |
52f0bd74 | 892 | struct vmap *vp; |
c906108c SS |
893 | int got_one, retried; |
894 | int got_exec_file = 0; | |
7a78ae4e ND |
895 | uint next; |
896 | int arch64 = ARCH64 (); | |
c906108c SS |
897 | |
898 | /* For each *ldi, see if we have a corresponding *vp. | |
899 | If so, update the mapping, and symbol table. | |
900 | If not, add an entry and symbol table. */ | |
901 | ||
c5aa993b JM |
902 | do |
903 | { | |
7a78ae4e | 904 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 905 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 906 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
907 | |
908 | retried = 0; | |
909 | ||
7a78ae4e | 910 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
911 | { |
912 | /* The kernel sets ld_info to -1, if the process is still using the | |
0df8b418 | 913 | object, and the object is removed. Keep the symbol info for the |
c5aa993b | 914 | removed object and issue a warning. */ |
8a3fe4f8 | 915 | warning (_("%s (fd=%d) has disappeared, keeping its symbols"), |
7a78ae4e | 916 | name, fd); |
c906108c | 917 | continue; |
c5aa993b JM |
918 | } |
919 | retry: | |
920 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
921 | { | |
922 | struct objfile *objfile; | |
c906108c | 923 | |
c5aa993b | 924 | /* First try to find a `vp', which is the same as in ldinfo. |
0df8b418 MS |
925 | If not the same, just continue and grep the next `vp'. If same, |
926 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
c5aa993b | 927 | found, get out of this for loop, add this ldi entry as a new vmap |
0df8b418 | 928 | (add_vmap) and come back, find its `vp' and so on... */ |
c5aa993b | 929 | |
0df8b418 | 930 | /* The filenames are not always sufficient to match on. */ |
c5aa993b | 931 | |
7ecb6532 MD |
932 | if ((name[0] == '/' && strcmp (name, vp->name) != 0) |
933 | || (memb[0] && strcmp (memb, vp->member) != 0)) | |
c906108c | 934 | continue; |
c906108c | 935 | |
c5aa993b JM |
936 | /* See if we are referring to the same file. |
937 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
938 | have updated the obfd after a change. */ | |
939 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
940 | if (objfile == NULL | |
941 | || objfile->obfd == NULL | |
942 | || bfd_stat (objfile->obfd, &vi) < 0) | |
943 | { | |
8a3fe4f8 | 944 | warning (_("Unable to stat %s, keeping its symbols"), name); |
c5aa993b JM |
945 | continue; |
946 | } | |
c906108c | 947 | |
c5aa993b JM |
948 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
949 | continue; | |
c906108c | 950 | |
c5aa993b | 951 | if (!retried) |
7a78ae4e | 952 | close (fd); |
c906108c | 953 | |
c5aa993b | 954 | ++got_one; |
c906108c | 955 | |
c5aa993b | 956 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 957 | |
7a78ae4e | 958 | vmap_secs (vp, ldi, arch64); |
c906108c | 959 | |
c5aa993b JM |
960 | /* The objfile is only NULL for the exec file. */ |
961 | if (vp->objfile == NULL) | |
962 | got_exec_file = 1; | |
c906108c | 963 | |
0df8b418 | 964 | /* relocate symbol table(s). */ |
c5aa993b | 965 | vmap_symtab (vp); |
c906108c | 966 | |
e42dc924 | 967 | /* Announce new object files. Doing this after symbol relocation |
2ec664f5 | 968 | makes aix-thread.c's job easier. */ |
06d3b283 UW |
969 | if (vp->objfile) |
970 | observer_notify_new_objfile (vp->objfile); | |
e42dc924 | 971 | |
c5aa993b JM |
972 | /* There may be more, so we don't break out of the loop. */ |
973 | } | |
974 | ||
0df8b418 MS |
975 | /* If there was no matching *vp, we must perforce create the |
976 | sucker(s). */ | |
c5aa993b JM |
977 | if (!got_one && !retried) |
978 | { | |
979 | add_vmap (ldi); | |
980 | ++retried; | |
981 | goto retry; | |
982 | } | |
983 | } | |
7a78ae4e ND |
984 | while ((next = LDI_NEXT (ldi, arch64)) |
985 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
986 | |
987 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
988 | is unlikely that the symbol file is relocated to the proper | |
989 | address. And we might have attached to a process which is | |
990 | running a different copy of the same executable. */ | |
991 | if (symfile_objfile != NULL && !got_exec_file) | |
992 | { | |
8a3fe4f8 | 993 | warning (_("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
994 | If in fact that file has symbols which the mapped files listed by\n\ |
995 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
996 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
8a3fe4f8 | 997 | symbols to the proper address)."), |
f5a96129 | 998 | symfile_objfile->name); |
c906108c | 999 | free_objfile (symfile_objfile); |
adb7f338 | 1000 | gdb_assert (symfile_objfile == NULL); |
c906108c SS |
1001 | } |
1002 | breakpoint_re_set (); | |
1003 | } | |
1004 | \f | |
0df8b418 | 1005 | /* As well as symbol tables, exec_sections need relocation. After |
c906108c | 1006 | the inferior process' termination, there will be a relocated symbol |
0df8b418 | 1007 | table exist with no corresponding inferior process. At that time, we |
c906108c SS |
1008 | need to use `exec' bfd, rather than the inferior process's memory space |
1009 | to look up symbols. | |
1010 | ||
1011 | `exec_sections' need to be relocated only once, as long as the exec | |
0df8b418 | 1012 | file remains unchanged. */ |
c906108c SS |
1013 | |
1014 | static void | |
7a78ae4e | 1015 | vmap_exec (void) |
c906108c SS |
1016 | { |
1017 | static bfd *execbfd; | |
1018 | int i; | |
397dbc8b | 1019 | struct target_section_table *table = target_get_section_table (&exec_ops); |
c906108c SS |
1020 | |
1021 | if (execbfd == exec_bfd) | |
1022 | return; | |
1023 | ||
1024 | execbfd = exec_bfd; | |
1025 | ||
397dbc8b JB |
1026 | if (!vmap || !table->sections) |
1027 | error (_("vmap_exec: vmap or table->sections == 0.")); | |
c906108c | 1028 | |
397dbc8b | 1029 | for (i = 0; &table->sections[i] < table->sections_end; i++) |
c906108c | 1030 | { |
397dbc8b | 1031 | if (strcmp (".text", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 1032 | { |
397dbc8b JB |
1033 | table->sections[i].addr += vmap->tstart - vmap->tvma; |
1034 | table->sections[i].endaddr += vmap->tstart - vmap->tvma; | |
c906108c | 1035 | } |
397dbc8b | 1036 | else if (strcmp (".data", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 1037 | { |
397dbc8b JB |
1038 | table->sections[i].addr += vmap->dstart - vmap->dvma; |
1039 | table->sections[i].endaddr += vmap->dstart - vmap->dvma; | |
c906108c | 1040 | } |
397dbc8b | 1041 | else if (strcmp (".bss", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 1042 | { |
397dbc8b JB |
1043 | table->sections[i].addr += vmap->dstart - vmap->dvma; |
1044 | table->sections[i].endaddr += vmap->dstart - vmap->dvma; | |
c906108c SS |
1045 | } |
1046 | } | |
1047 | } | |
7a78ae4e ND |
1048 | |
1049 | /* Set the current architecture from the host running GDB. Called when | |
0df8b418 | 1050 | starting a child process. */ |
7a78ae4e | 1051 | |
136d6dae VP |
1052 | static void (*super_create_inferior) (struct target_ops *,char *exec_file, |
1053 | char *allargs, char **env, int from_tty); | |
1f480a5e | 1054 | static void |
136d6dae VP |
1055 | rs6000_create_inferior (struct target_ops * ops, char *exec_file, |
1056 | char *allargs, char **env, int from_tty) | |
7a78ae4e ND |
1057 | { |
1058 | enum bfd_architecture arch; | |
1059 | unsigned long mach; | |
1060 | bfd abfd; | |
1061 | struct gdbarch_info info; | |
1062 | ||
136d6dae | 1063 | super_create_inferior (ops, exec_file, allargs, env, from_tty); |
1f480a5e | 1064 | |
7a78ae4e ND |
1065 | if (__power_rs ()) |
1066 | { | |
1067 | arch = bfd_arch_rs6000; | |
1068 | mach = bfd_mach_rs6k; | |
1069 | } | |
1070 | else | |
1071 | { | |
1072 | arch = bfd_arch_powerpc; | |
1073 | mach = bfd_mach_ppc; | |
1074 | } | |
19caaa45 PS |
1075 | |
1076 | /* FIXME: schauer/2002-02-25: | |
1077 | We don't know if we are executing a 32 or 64 bit executable, | |
1078 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
1079 | So we have to avoid switching to a new architecture, if the architecture | |
1080 | matches already. | |
1081 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
1082 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
1083 | determine the wordsize. */ | |
1084 | if (exec_bfd) | |
1085 | { | |
1086 | const struct bfd_arch_info *exec_bfd_arch_info; | |
1087 | ||
1088 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
1089 | if (arch == exec_bfd_arch_info->arch) | |
1090 | return; | |
1091 | } | |
1092 | ||
7a78ae4e ND |
1093 | bfd_default_set_arch_mach (&abfd, arch, mach); |
1094 | ||
fb6ecb0f | 1095 | gdbarch_info_init (&info); |
7a78ae4e | 1096 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 1097 | info.abfd = exec_bfd; |
7a78ae4e | 1098 | |
16f33e29 | 1099 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 1100 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
1101 | _("rs6000_create_inferior: failed " |
1102 | "to select architecture")); | |
7a78ae4e ND |
1103 | } |
1104 | ||
c906108c | 1105 | \f |
c5aa993b | 1106 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
8d08c9ce JB |
1107 | |
1108 | This is only applicable to live processes, and is a no-op when | |
1109 | debugging a core file. */ | |
c906108c SS |
1110 | |
1111 | void | |
7a78ae4e | 1112 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 1113 | { |
c18e0d23 | 1114 | int load_segs = 64; /* number of load segments */ |
380b774b | 1115 | int rc; |
7a78ae4e ND |
1116 | LdInfo *ldi = NULL; |
1117 | int arch64 = ARCH64 (); | |
1118 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
1119 | int size; | |
c906108c | 1120 | |
1ba0a4ee JB |
1121 | /* Nothing to do if we are debugging a core file. */ |
1122 | if (!target_has_execution) | |
8d08c9ce JB |
1123 | return; |
1124 | ||
c18e0d23 GM |
1125 | do |
1126 | { | |
7a78ae4e | 1127 | size = load_segs * ldisize; |
3a84337c | 1128 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 1129 | |
7a78ae4e | 1130 | #if 0 |
380b774b GM |
1131 | /* According to my humble theory, AIX has some timing problems and |
1132 | when the user stack grows, kernel doesn't update stack info in time | |
0df8b418 MS |
1133 | and ptrace calls step on user stack. That is why we sleep here a |
1134 | little, and give kernel to update its internals. */ | |
380b774b | 1135 | usleep (36000); |
7a78ae4e ND |
1136 | #endif |
1137 | ||
1138 | if (arch64) | |
8b5790f2 | 1139 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); |
7a78ae4e | 1140 | else |
8b5790f2 | 1141 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); |
c906108c | 1142 | |
c18e0d23 GM |
1143 | if (rc == -1) |
1144 | { | |
380b774b GM |
1145 | if (errno == ENOMEM) |
1146 | load_segs *= 2; | |
1147 | else | |
e2e0b3e5 | 1148 | perror_with_name (_("ptrace ldinfo")); |
c18e0d23 GM |
1149 | } |
1150 | else | |
1151 | { | |
380b774b | 1152 | vmap_ldinfo (ldi); |
0df8b418 | 1153 | vmap_exec (); /* relocate the exec and core sections as well. */ |
c18e0d23 GM |
1154 | } |
1155 | } while (rc == -1); | |
380b774b | 1156 | if (ldi) |
b8c9b27d | 1157 | xfree (ldi); |
c906108c SS |
1158 | } |
1159 | \f | |
1160 | /* Core file stuff. */ | |
1161 | ||
1162 | /* Relocate symtabs and read in shared library info, based on symbols | |
1163 | from the core file. */ | |
1164 | ||
1165 | void | |
7a78ae4e | 1166 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1167 | { |
7be0c536 | 1168 | struct bfd_section *ldinfo_sec; |
c906108c | 1169 | int offset = 0; |
7a78ae4e | 1170 | LdInfo *ldi; |
c906108c | 1171 | struct vmap *vp; |
7a78ae4e ND |
1172 | int arch64 = ARCH64 (); |
1173 | ||
0df8b418 | 1174 | /* Size of a struct ld_info except for the variable-length filename. */ |
7a78ae4e | 1175 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); |
c906108c SS |
1176 | |
1177 | /* Allocated size of buffer. */ | |
7a78ae4e | 1178 | int buffer_size = nonfilesz; |
c906108c SS |
1179 | char *buffer = xmalloc (buffer_size); |
1180 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1181 | |
c906108c SS |
1182 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1183 | if (ldinfo_sec == NULL) | |
1184 | { | |
1185 | bfd_err: | |
1186 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1187 | bfd_errmsg (bfd_get_error ())); | |
1188 | do_cleanups (old); | |
1189 | return; | |
1190 | } | |
1191 | do | |
1192 | { | |
1193 | int i; | |
1194 | int names_found = 0; | |
1195 | ||
1196 | /* Read in everything but the name. */ | |
1197 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1198 | offset, nonfilesz) == 0) |
c906108c SS |
1199 | goto bfd_err; |
1200 | ||
1201 | /* Now the name. */ | |
7a78ae4e | 1202 | i = nonfilesz; |
c906108c SS |
1203 | do |
1204 | { | |
1205 | if (i == buffer_size) | |
1206 | { | |
1207 | buffer_size *= 2; | |
1208 | buffer = xrealloc (buffer, buffer_size); | |
1209 | } | |
1210 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1211 | offset + i, 1) == 0) | |
1212 | goto bfd_err; | |
1213 | if (buffer[i++] == '\0') | |
1214 | ++names_found; | |
c5aa993b JM |
1215 | } |
1216 | while (names_found < 2); | |
c906108c | 1217 | |
7a78ae4e | 1218 | ldi = (LdInfo *) buffer; |
c906108c SS |
1219 | |
1220 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1221 | if (arch64) |
1222 | ldi->l64.ldinfo_fd = -1; | |
1223 | else | |
1224 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1225 | |
c906108c | 1226 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1227 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1228 | vp = vmap; |
1229 | else | |
7a78ae4e | 1230 | vp = add_vmap (ldi); |
c906108c | 1231 | |
0df8b418 | 1232 | /* Process next shared library upon error. */ |
7a78ae4e | 1233 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1234 | if (vp == NULL) |
1235 | continue; | |
1236 | ||
7a78ae4e | 1237 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1238 | |
1239 | /* Unless this is the exec file, | |
c5aa993b | 1240 | add our sections to the section table for the core target. */ |
c906108c SS |
1241 | if (vp != vmap) |
1242 | { | |
0542c86d | 1243 | struct target_section *stp; |
6426a772 | 1244 | |
07b82ea5 | 1245 | stp = deprecated_core_resize_section_table (2); |
c906108c SS |
1246 | |
1247 | stp->bfd = vp->bfd; | |
1248 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1249 | stp->addr = vp->tstart; | |
1250 | stp->endaddr = vp->tend; | |
1251 | stp++; | |
c5aa993b | 1252 | |
c906108c SS |
1253 | stp->bfd = vp->bfd; |
1254 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1255 | stp->addr = vp->dstart; | |
1256 | stp->endaddr = vp->dend; | |
1257 | } | |
1258 | ||
1259 | vmap_symtab (vp); | |
e42dc924 | 1260 | |
06d3b283 UW |
1261 | if (vp != vmap && vp->objfile) |
1262 | observer_notify_new_objfile (vp->objfile); | |
c5aa993b | 1263 | } |
7a78ae4e | 1264 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1265 | vmap_exec (); |
1266 | breakpoint_re_set (); | |
1267 | do_cleanups (old); | |
1268 | } | |
c906108c SS |
1269 | \f |
1270 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1271 | when calling functions in the inferior. | |
1272 | We try to find the relative toc offset of the objfile containing PC | |
1273 | and add the current load address of the data segment from the vmap. */ | |
1274 | ||
1275 | static CORE_ADDR | |
7a78ae4e | 1276 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1277 | { |
1278 | struct vmap *vp; | |
1279 | ||
1280 | for (vp = vmap; vp; vp = vp->nxt) | |
1281 | { | |
1282 | if (pc >= vp->tstart && pc < vp->tend) | |
1283 | { | |
1284 | /* vp->objfile is only NULL for the exec file. */ | |
63807e1d PA |
1285 | return vp->dstart + xcoff_get_toc_offset (vp->objfile == NULL |
1286 | ? symfile_objfile | |
1287 | : vp->objfile); | |
c906108c SS |
1288 | } |
1289 | } | |
8a3fe4f8 | 1290 | error (_("Unable to find TOC entry for pc %s."), hex_string (pc)); |
c906108c SS |
1291 | } |
1292 | \f | |
c906108c | 1293 | |
e1aca11e JB |
1294 | void _initialize_rs6000_nat (void); |
1295 | ||
c906108c | 1296 | void |
7a61a01c | 1297 | _initialize_rs6000_nat (void) |
c906108c | 1298 | { |
037a727e UW |
1299 | struct target_ops *t; |
1300 | ||
1301 | t = inf_ptrace_target (); | |
1302 | t->to_fetch_registers = rs6000_fetch_inferior_registers; | |
1303 | t->to_store_registers = rs6000_store_inferior_registers; | |
1304 | t->to_xfer_partial = rs6000_xfer_partial; | |
1f480a5e UW |
1305 | |
1306 | super_create_inferior = t->to_create_inferior; | |
1307 | t->to_create_inferior = rs6000_create_inferior; | |
1308 | ||
482f7fee UW |
1309 | t->to_wait = rs6000_wait; |
1310 | ||
037a727e UW |
1311 | add_target (t); |
1312 | ||
2ec664f5 MS |
1313 | /* Initialize hook in rs6000-tdep.c for determining the TOC address |
1314 | when calling functions in the inferior. */ | |
7a78ae4e | 1315 | rs6000_find_toc_address_hook = find_toc_address; |
c906108c | 1316 | } |