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 | |
570b8f7c | 135 | extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); |
c906108c | 136 | |
dd7be90a KB |
137 | /* Given REGNO, a gdb register number, return the corresponding |
138 | number suitable for use as a ptrace() parameter. Return -1 if | |
139 | there's no suitable mapping. Also, set the int pointed to by | |
140 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 141 | |
dd7be90a | 142 | static int |
206988c4 | 143 | regmap (struct gdbarch *gdbarch, int regno, int *isfloat) |
c5aa993b | 144 | { |
206988c4 | 145 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
146 | |
147 | *isfloat = 0; | |
8bf659e8 JB |
148 | if (tdep->ppc_gp0_regnum <= regno |
149 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 150 | return regno; |
383f0f5b JB |
151 | else if (tdep->ppc_fp0_regnum >= 0 |
152 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 153 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
154 | { |
155 | *isfloat = 1; | |
366f009f | 156 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a | 157 | } |
206988c4 | 158 | else if (regno == gdbarch_pc_regnum (gdbarch)) |
dd7be90a KB |
159 | return IAR; |
160 | else if (regno == tdep->ppc_ps_regnum) | |
161 | return MSR; | |
162 | else if (regno == tdep->ppc_cr_regnum) | |
163 | return CR; | |
164 | else if (regno == tdep->ppc_lr_regnum) | |
165 | return LR; | |
166 | else if (regno == tdep->ppc_ctr_regnum) | |
167 | return CTR; | |
168 | else if (regno == tdep->ppc_xer_regnum) | |
169 | return XER; | |
383f0f5b JB |
170 | else if (tdep->ppc_fpscr_regnum >= 0 |
171 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 172 | return FPSCR; |
dd7be90a KB |
173 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
174 | return MQ; | |
175 | else | |
176 | return -1; | |
177 | } | |
c906108c | 178 | |
0df8b418 | 179 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 180 | |
7a78ae4e | 181 | static int |
8b5790f2 | 182 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
183 | { |
184 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
185 | #if 0 | |
8b5790f2 | 186 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
187 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
188 | #endif | |
189 | return ret; | |
190 | } | |
c906108c | 191 | |
0df8b418 | 192 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 193 | |
7a78ae4e | 194 | static int |
0d16ee5d | 195 | rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) |
7a78ae4e ND |
196 | { |
197 | #ifdef ARCH3264 | |
198 | int ret = ptracex (req, id, addr, data, buf); | |
199 | #else | |
200 | int ret = 0; | |
201 | #endif | |
202 | #if 0 | |
2244ba2e PM |
203 | printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n", |
204 | req, id, hex_string (addr), data, (unsigned int)buf, ret); | |
7a78ae4e ND |
205 | #endif |
206 | return ret; | |
207 | } | |
c906108c | 208 | |
0df8b418 | 209 | /* Fetch register REGNO from the inferior. */ |
c906108c | 210 | |
7a78ae4e | 211 | static void |
56be3814 | 212 | fetch_register (struct regcache *regcache, int regno) |
7a78ae4e | 213 | { |
8b164abb | 214 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 215 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 216 | int nr, isfloat; |
c906108c | 217 | |
0df8b418 | 218 | /* Retrieved values may be -1, so infer errors from errno. */ |
7a78ae4e | 219 | errno = 0; |
c906108c | 220 | |
206988c4 | 221 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 222 | |
0df8b418 | 223 | /* Floating-point registers. */ |
dd7be90a KB |
224 | if (isfloat) |
225 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 226 | |
0df8b418 | 227 | /* Bogus register number. */ |
dd7be90a | 228 | else if (nr < 0) |
2a18e3d9 | 229 | { |
8b164abb | 230 | if (regno >= gdbarch_num_regs (gdbarch)) |
2a18e3d9 EZ |
231 | fprintf_unfiltered (gdb_stderr, |
232 | "gdb error: register no %d not implemented.\n", | |
233 | regno); | |
dd7be90a | 234 | return; |
2a18e3d9 | 235 | } |
c906108c | 236 | |
0df8b418 | 237 | /* Fixed-point registers. */ |
7a78ae4e ND |
238 | else |
239 | { | |
7a78ae4e | 240 | if (!ARCH64 ()) |
0df8b418 MS |
241 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), |
242 | (int *) nr, 0, 0); | |
7a78ae4e ND |
243 | else |
244 | { | |
245 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
0df8b418 | 246 | even if the register is really only 32 bits. */ |
7a78ae4e | 247 | long long buf; |
0d16ee5d | 248 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
8b164abb | 249 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
250 | memcpy (addr, &buf, 8); |
251 | else | |
252 | *addr = buf; | |
253 | } | |
254 | } | |
255 | ||
256 | if (!errno) | |
56be3814 | 257 | regcache_raw_supply (regcache, regno, (char *) addr); |
7a78ae4e ND |
258 | else |
259 | { | |
260 | #if 0 | |
0df8b418 | 261 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ |
9b20d036 | 262 | perror (_("ptrace read")); |
7a78ae4e ND |
263 | #endif |
264 | errno = 0; | |
265 | } | |
c906108c SS |
266 | } |
267 | ||
0df8b418 | 268 | /* Store register REGNO back into the inferior. */ |
c906108c | 269 | |
7a78ae4e | 270 | static void |
fb14de7b | 271 | store_register (struct regcache *regcache, int regno) |
c906108c | 272 | { |
8b164abb | 273 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 274 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 275 | int nr, isfloat; |
c906108c | 276 | |
11bf77db | 277 | /* Fetch the register's value from the register cache. */ |
56be3814 | 278 | regcache_raw_collect (regcache, regno, addr); |
11bf77db | 279 | |
0df8b418 | 280 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
281 | errno = 0; |
282 | ||
206988c4 | 283 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 284 | |
0df8b418 | 285 | /* Floating-point registers. */ |
dd7be90a KB |
286 | if (isfloat) |
287 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 288 | |
0df8b418 | 289 | /* Bogus register number. */ |
dd7be90a | 290 | else if (nr < 0) |
7a78ae4e | 291 | { |
8b164abb | 292 | if (regno >= gdbarch_num_regs (gdbarch)) |
7a78ae4e ND |
293 | fprintf_unfiltered (gdb_stderr, |
294 | "gdb error: register no %d not implemented.\n", | |
295 | regno); | |
296 | } | |
c906108c | 297 | |
0df8b418 | 298 | /* Fixed-point registers. */ |
7a78ae4e ND |
299 | else |
300 | { | |
8b164abb | 301 | if (regno == gdbarch_sp_regnum (gdbarch)) |
7a78ae4e ND |
302 | /* Execute one dummy instruction (which is a breakpoint) in inferior |
303 | process to give kernel a chance to do internal housekeeping. | |
304 | Otherwise the following ptrace(2) calls will mess up user stack | |
305 | since kernel will get confused about the bottom of the stack | |
0df8b418 | 306 | (%sp). */ |
fb14de7b | 307 | exec_one_dummy_insn (regcache); |
c906108c | 308 | |
11bf77db KB |
309 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
310 | the register's value is passed by value, but for 64-bit inferiors, | |
311 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 312 | if (!ARCH64 ()) |
0df8b418 MS |
313 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), |
314 | (int *) nr, *addr, 0); | |
7a78ae4e | 315 | else |
c906108c | 316 | { |
7a78ae4e | 317 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
0df8b418 | 318 | area, even if the register is really only 32 bits. */ |
7a78ae4e | 319 | long long buf; |
8b164abb | 320 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
321 | memcpy (&buf, addr, 8); |
322 | else | |
323 | buf = *addr; | |
0d16ee5d | 324 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
c906108c SS |
325 | } |
326 | } | |
327 | ||
7a78ae4e | 328 | if (errno) |
c906108c | 329 | { |
9b20d036 | 330 | perror (_("ptrace write")); |
7a78ae4e | 331 | errno = 0; |
c906108c | 332 | } |
7a78ae4e | 333 | } |
c906108c | 334 | |
7a78ae4e | 335 | /* Read from the inferior all registers if REGNO == -1 and just register |
0df8b418 | 336 | REGNO otherwise. */ |
c906108c | 337 | |
037a727e | 338 | static void |
28439f5e PA |
339 | rs6000_fetch_inferior_registers (struct target_ops *ops, |
340 | struct regcache *regcache, int regno) | |
7a78ae4e | 341 | { |
8b164abb | 342 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 343 | if (regno != -1) |
56be3814 | 344 | fetch_register (regcache, regno); |
7a78ae4e ND |
345 | |
346 | else | |
c906108c | 347 | { |
8b164abb | 348 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e | 349 | |
dd7be90a KB |
350 | /* Read 32 general purpose registers. */ |
351 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 352 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
353 | regno++) |
354 | { | |
56be3814 | 355 | fetch_register (regcache, regno); |
dd7be90a KB |
356 | } |
357 | ||
358 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
359 | if (tdep->ppc_fp0_regnum >= 0) |
360 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 361 | fetch_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 362 | |
dd7be90a | 363 | /* Read special registers. */ |
8b164abb | 364 | fetch_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
365 | fetch_register (regcache, tdep->ppc_ps_regnum); |
366 | fetch_register (regcache, tdep->ppc_cr_regnum); | |
367 | fetch_register (regcache, tdep->ppc_lr_regnum); | |
368 | fetch_register (regcache, tdep->ppc_ctr_regnum); | |
369 | fetch_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 370 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 371 | fetch_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 372 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 373 | fetch_register (regcache, tdep->ppc_mq_regnum); |
c906108c | 374 | } |
7a78ae4e | 375 | } |
c906108c | 376 | |
7a78ae4e ND |
377 | /* Store our register values back into the inferior. |
378 | If REGNO is -1, do this for all registers. | |
379 | Otherwise, REGNO specifies which register (so we can save time). */ | |
380 | ||
037a727e | 381 | static void |
28439f5e PA |
382 | rs6000_store_inferior_registers (struct target_ops *ops, |
383 | struct regcache *regcache, int regno) | |
7a78ae4e | 384 | { |
8b164abb | 385 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 386 | if (regno != -1) |
56be3814 | 387 | store_register (regcache, regno); |
7a78ae4e ND |
388 | |
389 | else | |
f6077098 | 390 | { |
8b164abb | 391 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
392 | |
393 | /* Write general purpose registers first. */ | |
394 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 395 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
396 | regno++) |
397 | { | |
56be3814 | 398 | store_register (regcache, regno); |
dd7be90a | 399 | } |
7a78ae4e | 400 | |
dd7be90a | 401 | /* Write floating point registers. */ |
383f0f5b JB |
402 | if (tdep->ppc_fp0_regnum >= 0) |
403 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 404 | store_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 405 | |
dd7be90a | 406 | /* Write special registers. */ |
8b164abb | 407 | store_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
408 | store_register (regcache, tdep->ppc_ps_regnum); |
409 | store_register (regcache, tdep->ppc_cr_regnum); | |
410 | store_register (regcache, tdep->ppc_lr_regnum); | |
411 | store_register (regcache, tdep->ppc_ctr_regnum); | |
412 | store_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 413 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 414 | store_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 415 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 416 | store_register (regcache, tdep->ppc_mq_regnum); |
f6077098 | 417 | } |
7a78ae4e | 418 | } |
f6077098 | 419 | |
7a78ae4e | 420 | |
037a727e UW |
421 | /* Attempt a transfer all LEN bytes starting at OFFSET between the |
422 | inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. | |
423 | Return the number of bytes actually transferred. */ | |
7a78ae4e | 424 | |
037a727e UW |
425 | static LONGEST |
426 | rs6000_xfer_partial (struct target_ops *ops, enum target_object object, | |
427 | const char *annex, gdb_byte *readbuf, | |
428 | const gdb_byte *writebuf, | |
429 | ULONGEST offset, LONGEST len) | |
7a78ae4e | 430 | { |
037a727e | 431 | pid_t pid = ptid_get_pid (inferior_ptid); |
7a78ae4e | 432 | int arch64 = ARCH64 (); |
7a78ae4e | 433 | |
037a727e | 434 | switch (object) |
c906108c | 435 | { |
037a727e UW |
436 | case TARGET_OBJECT_MEMORY: |
437 | { | |
438 | union | |
7a78ae4e | 439 | { |
037a727e UW |
440 | PTRACE_TYPE_RET word; |
441 | gdb_byte byte[sizeof (PTRACE_TYPE_RET)]; | |
442 | } buffer; | |
443 | ULONGEST rounded_offset; | |
444 | LONGEST partial_len; | |
445 | ||
446 | /* Round the start offset down to the next long word | |
447 | boundary. */ | |
448 | rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET); | |
449 | ||
450 | /* Since ptrace will transfer a single word starting at that | |
451 | rounded_offset the partial_len needs to be adjusted down to | |
452 | that (remember this function only does a single transfer). | |
453 | Should the required length be even less, adjust it down | |
454 | again. */ | |
455 | partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset; | |
456 | if (partial_len > len) | |
457 | partial_len = len; | |
458 | ||
459 | if (writebuf) | |
460 | { | |
461 | /* If OFFSET:PARTIAL_LEN is smaller than | |
462 | ROUNDED_OFFSET:WORDSIZE then a read/modify write will | |
463 | be needed. Read in the entire word. */ | |
464 | if (rounded_offset < offset | |
465 | || (offset + partial_len | |
466 | < rounded_offset + sizeof (PTRACE_TYPE_RET))) | |
467 | { | |
468 | /* Need part of initial word -- fetch it. */ | |
469 | if (arch64) | |
470 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
471 | rounded_offset, 0, NULL); | |
472 | else | |
473 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
0df8b418 MS |
474 | (int *) (uintptr_t) |
475 | rounded_offset, | |
037a727e UW |
476 | 0, NULL); |
477 | } | |
478 | ||
479 | /* Copy data to be written over corresponding part of | |
480 | buffer. */ | |
481 | memcpy (buffer.byte + (offset - rounded_offset), | |
482 | writebuf, partial_len); | |
483 | ||
484 | errno = 0; | |
485 | if (arch64) | |
486 | rs6000_ptrace64 (PT_WRITE_D, pid, | |
487 | rounded_offset, buffer.word, NULL); | |
488 | else | |
489 | rs6000_ptrace32 (PT_WRITE_D, pid, | |
0df8b418 MS |
490 | (int *) (uintptr_t) rounded_offset, |
491 | buffer.word, NULL); | |
037a727e UW |
492 | if (errno) |
493 | return 0; | |
494 | } | |
495 | ||
496 | if (readbuf) | |
497 | { | |
498 | errno = 0; | |
499 | if (arch64) | |
500 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
501 | rounded_offset, 0, NULL); | |
502 | else | |
503 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
504 | (int *)(uintptr_t)rounded_offset, | |
505 | 0, NULL); | |
506 | if (errno) | |
507 | return 0; | |
508 | ||
509 | /* Copy appropriate bytes out of the buffer. */ | |
510 | memcpy (readbuf, buffer.byte + (offset - rounded_offset), | |
511 | partial_len); | |
512 | } | |
513 | ||
514 | return partial_len; | |
515 | } | |
516 | ||
517 | default: | |
518 | return -1; | |
7a78ae4e | 519 | } |
c906108c SS |
520 | } |
521 | ||
482f7fee UW |
522 | /* Wait for the child specified by PTID to do something. Return the |
523 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
524 | the status in *OURSTATUS. */ | |
525 | ||
526 | static ptid_t | |
117de6a9 | 527 | rs6000_wait (struct target_ops *ops, |
47608cb1 | 528 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
482f7fee UW |
529 | { |
530 | pid_t pid; | |
531 | int status, save_errno; | |
532 | ||
533 | do | |
534 | { | |
535 | set_sigint_trap (); | |
482f7fee UW |
536 | |
537 | do | |
538 | { | |
539 | pid = waitpid (ptid_get_pid (ptid), &status, 0); | |
540 | save_errno = errno; | |
541 | } | |
542 | while (pid == -1 && errno == EINTR); | |
543 | ||
482f7fee UW |
544 | clear_sigint_trap (); |
545 | ||
546 | if (pid == -1) | |
547 | { | |
548 | fprintf_unfiltered (gdb_stderr, | |
549 | _("Child process unexpectedly missing: %s.\n"), | |
550 | safe_strerror (save_errno)); | |
551 | ||
552 | /* Claim it exited with unknown signal. */ | |
553 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 554 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 555 | return inferior_ptid; |
482f7fee UW |
556 | } |
557 | ||
558 | /* Ignore terminated detached child processes. */ | |
559 | if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid)) | |
560 | pid = -1; | |
561 | } | |
562 | while (pid == -1); | |
563 | ||
564 | /* AIX has a couple of strange returns from wait(). */ | |
565 | ||
566 | /* stop after load" status. */ | |
567 | if (status == 0x57c) | |
568 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
0df8b418 | 569 | /* signal 0. I have no idea why wait(2) returns with this status word. */ |
482f7fee UW |
570 | else if (status == 0x7f) |
571 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
572 | /* A normal waitstatus. Let the usual macros deal with it. */ | |
573 | else | |
574 | store_waitstatus (ourstatus, status); | |
575 | ||
576 | return pid_to_ptid (pid); | |
577 | } | |
037a727e | 578 | |
c906108c SS |
579 | /* Execute one dummy breakpoint instruction. This way we give the kernel |
580 | a chance to do some housekeeping and update inferior's internal data, | |
0df8b418 | 581 | including u_area. */ |
c906108c SS |
582 | |
583 | static void | |
fb14de7b | 584 | exec_one_dummy_insn (struct regcache *regcache) |
c906108c | 585 | { |
4a7622d1 | 586 | #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 |
c906108c | 587 | |
a6d9a66e | 588 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 589 | int ret, status, pid; |
c906108c | 590 | CORE_ADDR prev_pc; |
8181d85f | 591 | void *bp; |
c906108c | 592 | |
0df8b418 | 593 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We |
c906108c | 594 | assume that this address will never be executed again by the real |
0df8b418 | 595 | code. */ |
c906108c | 596 | |
47607d6f | 597 | bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR); |
c906108c | 598 | |
c906108c SS |
599 | /* You might think this could be done with a single ptrace call, and |
600 | you'd be correct for just about every platform I've ever worked | |
601 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
602 | the inferior never hits the breakpoint (it's also worth noting | |
603 | powerpc-ibm-aix4.1.3 works correctly). */ | |
fb14de7b UW |
604 | prev_pc = regcache_read_pc (regcache); |
605 | regcache_write_pc (regcache, DUMMY_INSN_ADDR); | |
7a78ae4e | 606 | if (ARCH64 ()) |
8b5790f2 | 607 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 608 | else |
0df8b418 MS |
609 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), |
610 | (int *) 1, 0, NULL); | |
c906108c | 611 | |
7a78ae4e | 612 | if (ret != 0) |
9b20d036 | 613 | perror (_("pt_continue")); |
c906108c | 614 | |
c5aa993b JM |
615 | do |
616 | { | |
5be4dfca | 617 | pid = waitpid (PIDGET (inferior_ptid), &status, 0); |
c5aa993b | 618 | } |
39f77062 | 619 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 620 | |
fb14de7b | 621 | regcache_write_pc (regcache, prev_pc); |
a6d9a66e | 622 | deprecated_remove_raw_breakpoint (gdbarch, bp); |
c906108c | 623 | } |
c906108c | 624 | \f |
7a78ae4e ND |
625 | |
626 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
0df8b418 | 627 | process if ARCH64 and for a 32-bit process otherwise. */ |
7a78ae4e ND |
628 | |
629 | static void | |
630 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
631 | { | |
632 | if (arch64) | |
633 | { | |
634 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
635 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
636 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
637 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
638 | } | |
639 | else | |
640 | { | |
641 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
642 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
643 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
644 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
645 | } | |
646 | ||
647 | /* The run time loader maps the file header in addition to the text | |
648 | section and returns a pointer to the header in ldinfo_textorg. | |
649 | Adjust the text start address to point to the real start address | |
650 | of the text section. */ | |
651 | vp->tstart += vp->toffs; | |
652 | } | |
653 | ||
8333c85b JB |
654 | /* If the .bss section's VMA is set to an address located before |
655 | the end of the .data section, causing the two sections to overlap, | |
656 | return the overlap in bytes. Otherwise, return zero. | |
657 | ||
658 | Motivation: | |
659 | ||
660 | The GNU linker sometimes sets the start address of the .bss session | |
661 | before the end of the .data section, making the 2 sections overlap. | |
662 | The loader appears to handle this situation gracefully, by simply | |
663 | loading the bss section right after the end of the .data section. | |
664 | ||
665 | This means that the .data and the .bss sections are sometimes | |
666 | no longer relocated by the same amount. The problem is that | |
667 | the ldinfo data does not contain any information regarding | |
668 | the relocation of the .bss section, assuming that it would be | |
669 | identical to the information provided for the .data section | |
670 | (this is what would normally happen if the program was linked | |
671 | correctly). | |
672 | ||
673 | GDB therefore needs to detect those cases, and make the corresponding | |
674 | adjustment to the .bss section offset computed from the ldinfo data | |
675 | when necessary. This function returns the adjustment amount (or | |
676 | zero when no adjustment is needed). */ | |
677 | ||
678 | static CORE_ADDR | |
679 | bss_data_overlap (struct objfile *objfile) | |
680 | { | |
681 | struct obj_section *osect; | |
682 | struct bfd_section *data = NULL; | |
683 | struct bfd_section *bss = NULL; | |
684 | ||
685 | /* First, find the .data and .bss sections. */ | |
686 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
687 | { | |
688 | if (strcmp (bfd_section_name (objfile->obfd, | |
689 | osect->the_bfd_section), | |
690 | ".data") == 0) | |
691 | data = osect->the_bfd_section; | |
692 | else if (strcmp (bfd_section_name (objfile->obfd, | |
693 | osect->the_bfd_section), | |
694 | ".bss") == 0) | |
695 | bss = osect->the_bfd_section; | |
696 | } | |
697 | ||
698 | /* If either section is not defined, there can be no overlap. */ | |
699 | if (data == NULL || bss == NULL) | |
700 | return 0; | |
701 | ||
702 | /* Assume the problem only occurs with linkers that place the .bss | |
703 | section after the .data section (the problem has only been | |
704 | observed when using the GNU linker, and the default linker | |
705 | script always places the .data and .bss sections in that order). */ | |
706 | if (bfd_section_vma (objfile->obfd, bss) | |
707 | < bfd_section_vma (objfile->obfd, data)) | |
708 | return 0; | |
709 | ||
710 | if (bfd_section_vma (objfile->obfd, bss) | |
711 | < bfd_section_vma (objfile->obfd, data) + bfd_get_section_size (data)) | |
712 | return ((bfd_section_vma (objfile->obfd, data) | |
713 | + bfd_get_section_size (data)) | |
714 | - bfd_section_vma (objfile->obfd, bss)); | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
0df8b418 | 719 | /* Handle symbol translation on vmapping. */ |
c906108c SS |
720 | |
721 | static void | |
7a78ae4e | 722 | vmap_symtab (struct vmap *vp) |
c906108c | 723 | { |
52f0bd74 | 724 | struct objfile *objfile; |
c906108c SS |
725 | struct section_offsets *new_offsets; |
726 | int i; | |
c5aa993b | 727 | |
c906108c SS |
728 | objfile = vp->objfile; |
729 | if (objfile == NULL) | |
730 | { | |
731 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
732 | Currently, that can only happen with the exec file, so |
733 | relocate the symbols for the symfile. */ | |
c906108c SS |
734 | if (symfile_objfile == NULL) |
735 | return; | |
736 | objfile = symfile_objfile; | |
737 | } | |
63f58cc5 | 738 | else if (!vp->loaded) |
0df8b418 | 739 | /* If symbols are not yet loaded, offsets are not yet valid. */ |
63f58cc5 | 740 | return; |
c906108c | 741 | |
9f83329d JB |
742 | new_offsets = |
743 | (struct section_offsets *) | |
744 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
c906108c SS |
745 | |
746 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 747 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 748 | |
c906108c SS |
749 | /* The symbols in the object file are linked to the VMA of the section, |
750 | relocate them VMA relative. */ | |
f0a58b0b EZ |
751 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
752 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
753 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c | 754 | |
8333c85b JB |
755 | /* Perform the same adjustment as the loader if the .data and |
756 | .bss sections overlap. */ | |
757 | new_offsets->offsets[SECT_OFF_BSS (objfile)] += bss_data_overlap (objfile); | |
758 | ||
c906108c SS |
759 | objfile_relocate (objfile, new_offsets); |
760 | } | |
761 | \f | |
762 | /* Add symbols for an objfile. */ | |
763 | ||
764 | static int | |
7a78ae4e | 765 | objfile_symbol_add (void *arg) |
c906108c SS |
766 | { |
767 | struct objfile *obj = (struct objfile *) arg; | |
768 | ||
7eedccfa PP |
769 | syms_from_objfile (obj, NULL, 0, 0, 0); |
770 | new_symfile_objfile (obj, 0); | |
c906108c SS |
771 | return 1; |
772 | } | |
773 | ||
63f58cc5 PS |
774 | /* Add symbols for a vmap. Return zero upon error. */ |
775 | ||
776 | int | |
777 | vmap_add_symbols (struct vmap *vp) | |
778 | { | |
779 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
780 | "Error while reading shared library symbols:\n", | |
781 | RETURN_MASK_ALL)) | |
782 | { | |
783 | /* Note this is only done if symbol reading was successful. */ | |
784 | vp->loaded = 1; | |
785 | vmap_symtab (vp); | |
786 | return 1; | |
787 | } | |
788 | return 0; | |
789 | } | |
790 | ||
c906108c SS |
791 | /* Add a new vmap entry based on ldinfo() information. |
792 | ||
793 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
794 | core file), the caller should set it to -1, and we will open the file. | |
795 | ||
796 | Return the vmap new entry. */ | |
797 | ||
798 | static struct vmap * | |
7a78ae4e | 799 | add_vmap (LdInfo *ldi) |
c906108c SS |
800 | { |
801 | bfd *abfd, *last; | |
a4453b7e | 802 | char *mem, *filename; |
c906108c SS |
803 | struct objfile *obj; |
804 | struct vmap *vp; | |
7a78ae4e ND |
805 | int fd; |
806 | ARCH64_DECL (arch64); | |
c906108c SS |
807 | |
808 | /* This ldi structure was allocated using alloca() in | |
0df8b418 MS |
809 | xcoff_relocate_symtab(). Now we need to have persistent object |
810 | and member names, so we should save them. */ | |
c906108c | 811 | |
7a78ae4e ND |
812 | filename = LDI_FILENAME (ldi, arch64); |
813 | mem = filename + strlen (filename) + 1; | |
1b36a34b | 814 | mem = xstrdup (mem); |
c906108c | 815 | |
7a78ae4e | 816 | fd = LDI_FD (ldi, arch64); |
1c00ec6b | 817 | abfd = gdb_bfd_open (filename, gnutarget, fd < 0 ? -1 : fd); |
c906108c | 818 | if (!abfd) |
63f58cc5 | 819 | { |
8a3fe4f8 | 820 | warning (_("Could not open `%s' as an executable file: %s"), |
a4453b7e | 821 | filename, bfd_errmsg (bfd_get_error ())); |
63f58cc5 PS |
822 | return NULL; |
823 | } | |
c906108c | 824 | |
0df8b418 | 825 | /* Make sure we have an object file. */ |
c906108c SS |
826 | |
827 | if (bfd_check_format (abfd, bfd_object)) | |
828 | vp = map_vmap (abfd, 0); | |
829 | ||
830 | else if (bfd_check_format (abfd, bfd_archive)) | |
831 | { | |
da1cc82f TT |
832 | last = gdb_bfd_openr_next_archived_file (abfd, NULL); |
833 | while (last != NULL) | |
520b0001 | 834 | { |
da1cc82f TT |
835 | bfd *next; |
836 | ||
520b0001 TT |
837 | if (strcmp (mem, last->filename) == 0) |
838 | break; | |
da1cc82f TT |
839 | |
840 | next = gdb_bfd_openr_next_archived_file (abfd, last); | |
841 | gdb_bfd_unref (last); | |
8f0ee2eb | 842 | last = next; |
520b0001 | 843 | } |
c906108c SS |
844 | |
845 | if (!last) | |
846 | { | |
a4453b7e | 847 | warning (_("\"%s\": member \"%s\" missing."), filename, mem); |
cbb099e8 | 848 | gdb_bfd_unref (abfd); |
63f58cc5 | 849 | return NULL; |
c906108c SS |
850 | } |
851 | ||
c5aa993b | 852 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 853 | { |
8a3fe4f8 | 854 | warning (_("\"%s\": member \"%s\" not in executable format: %s."), |
a4453b7e | 855 | filename, mem, bfd_errmsg (bfd_get_error ())); |
cbb099e8 TT |
856 | gdb_bfd_unref (last); |
857 | gdb_bfd_unref (abfd); | |
63f58cc5 | 858 | return NULL; |
c906108c SS |
859 | } |
860 | ||
861 | vp = map_vmap (last, abfd); | |
da1cc82f TT |
862 | /* map_vmap acquired a reference to LAST, so we can release |
863 | ours. */ | |
864 | gdb_bfd_unref (last); | |
c906108c SS |
865 | } |
866 | else | |
867 | { | |
8a3fe4f8 | 868 | warning (_("\"%s\": not in executable format: %s."), |
a4453b7e | 869 | filename, bfd_errmsg (bfd_get_error ())); |
cbb099e8 | 870 | gdb_bfd_unref (abfd); |
63f58cc5 | 871 | return NULL; |
c906108c | 872 | } |
520b0001 | 873 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
874 | vp->objfile = obj; |
875 | ||
63f58cc5 PS |
876 | /* Always add symbols for the main objfile. */ |
877 | if (vp == vmap || auto_solib_add) | |
878 | vmap_add_symbols (vp); | |
da1cc82f TT |
879 | |
880 | /* Anything needing a reference to ABFD has already acquired it, so | |
881 | release our local reference. */ | |
882 | gdb_bfd_unref (abfd); | |
883 | ||
c906108c SS |
884 | return vp; |
885 | } | |
886 | \f | |
887 | /* update VMAP info with ldinfo() information | |
888 | Input is ptr to ldinfo() results. */ | |
889 | ||
890 | static void | |
7a78ae4e | 891 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
892 | { |
893 | struct stat ii, vi; | |
52f0bd74 | 894 | struct vmap *vp; |
c906108c SS |
895 | int got_one, retried; |
896 | int got_exec_file = 0; | |
7a78ae4e ND |
897 | uint next; |
898 | int arch64 = ARCH64 (); | |
c906108c SS |
899 | |
900 | /* For each *ldi, see if we have a corresponding *vp. | |
901 | If so, update the mapping, and symbol table. | |
902 | If not, add an entry and symbol table. */ | |
903 | ||
c5aa993b JM |
904 | do |
905 | { | |
7a78ae4e | 906 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 907 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 908 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
909 | |
910 | retried = 0; | |
911 | ||
7a78ae4e | 912 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
913 | { |
914 | /* The kernel sets ld_info to -1, if the process is still using the | |
0df8b418 | 915 | object, and the object is removed. Keep the symbol info for the |
c5aa993b | 916 | removed object and issue a warning. */ |
8a3fe4f8 | 917 | warning (_("%s (fd=%d) has disappeared, keeping its symbols"), |
7a78ae4e | 918 | name, fd); |
c906108c | 919 | continue; |
c5aa993b JM |
920 | } |
921 | retry: | |
922 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
923 | { | |
924 | struct objfile *objfile; | |
c906108c | 925 | |
c5aa993b | 926 | /* First try to find a `vp', which is the same as in ldinfo. |
0df8b418 MS |
927 | If not the same, just continue and grep the next `vp'. If same, |
928 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
c5aa993b | 929 | found, get out of this for loop, add this ldi entry as a new vmap |
0df8b418 | 930 | (add_vmap) and come back, find its `vp' and so on... */ |
c5aa993b | 931 | |
0df8b418 | 932 | /* The filenames are not always sufficient to match on. */ |
c5aa993b | 933 | |
7ecb6532 MD |
934 | if ((name[0] == '/' && strcmp (name, vp->name) != 0) |
935 | || (memb[0] && strcmp (memb, vp->member) != 0)) | |
c906108c | 936 | continue; |
c906108c | 937 | |
c5aa993b JM |
938 | /* See if we are referring to the same file. |
939 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
940 | have updated the obfd after a change. */ | |
941 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
942 | if (objfile == NULL | |
943 | || objfile->obfd == NULL | |
944 | || bfd_stat (objfile->obfd, &vi) < 0) | |
945 | { | |
8a3fe4f8 | 946 | warning (_("Unable to stat %s, keeping its symbols"), name); |
c5aa993b JM |
947 | continue; |
948 | } | |
c906108c | 949 | |
c5aa993b JM |
950 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
951 | continue; | |
c906108c | 952 | |
c5aa993b | 953 | if (!retried) |
7a78ae4e | 954 | close (fd); |
c906108c | 955 | |
c5aa993b | 956 | ++got_one; |
c906108c | 957 | |
c5aa993b | 958 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 959 | |
7a78ae4e | 960 | vmap_secs (vp, ldi, arch64); |
c906108c | 961 | |
c5aa993b JM |
962 | /* The objfile is only NULL for the exec file. */ |
963 | if (vp->objfile == NULL) | |
964 | got_exec_file = 1; | |
c906108c | 965 | |
0df8b418 | 966 | /* relocate symbol table(s). */ |
c5aa993b | 967 | vmap_symtab (vp); |
c906108c | 968 | |
e42dc924 | 969 | /* Announce new object files. Doing this after symbol relocation |
2ec664f5 | 970 | makes aix-thread.c's job easier. */ |
06d3b283 UW |
971 | if (vp->objfile) |
972 | observer_notify_new_objfile (vp->objfile); | |
e42dc924 | 973 | |
c5aa993b JM |
974 | /* There may be more, so we don't break out of the loop. */ |
975 | } | |
976 | ||
0df8b418 MS |
977 | /* If there was no matching *vp, we must perforce create the |
978 | sucker(s). */ | |
c5aa993b JM |
979 | if (!got_one && !retried) |
980 | { | |
981 | add_vmap (ldi); | |
982 | ++retried; | |
983 | goto retry; | |
984 | } | |
985 | } | |
7a78ae4e ND |
986 | while ((next = LDI_NEXT (ldi, arch64)) |
987 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
988 | |
989 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
990 | is unlikely that the symbol file is relocated to the proper | |
991 | address. And we might have attached to a process which is | |
992 | running a different copy of the same executable. */ | |
993 | if (symfile_objfile != NULL && !got_exec_file) | |
994 | { | |
8a3fe4f8 | 995 | warning (_("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
996 | If in fact that file has symbols which the mapped files listed by\n\ |
997 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
998 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
8a3fe4f8 | 999 | symbols to the proper address)."), |
f5a96129 | 1000 | symfile_objfile->name); |
c906108c | 1001 | free_objfile (symfile_objfile); |
adb7f338 | 1002 | gdb_assert (symfile_objfile == NULL); |
c906108c SS |
1003 | } |
1004 | breakpoint_re_set (); | |
1005 | } | |
1006 | \f | |
0df8b418 | 1007 | /* As well as symbol tables, exec_sections need relocation. After |
c906108c | 1008 | the inferior process' termination, there will be a relocated symbol |
0df8b418 | 1009 | table exist with no corresponding inferior process. At that time, we |
c906108c SS |
1010 | need to use `exec' bfd, rather than the inferior process's memory space |
1011 | to look up symbols. | |
1012 | ||
1013 | `exec_sections' need to be relocated only once, as long as the exec | |
0df8b418 | 1014 | file remains unchanged. */ |
c906108c SS |
1015 | |
1016 | static void | |
7a78ae4e | 1017 | vmap_exec (void) |
c906108c SS |
1018 | { |
1019 | static bfd *execbfd; | |
1020 | int i; | |
397dbc8b | 1021 | struct target_section_table *table = target_get_section_table (&exec_ops); |
c906108c SS |
1022 | |
1023 | if (execbfd == exec_bfd) | |
1024 | return; | |
1025 | ||
1026 | execbfd = exec_bfd; | |
1027 | ||
397dbc8b JB |
1028 | if (!vmap || !table->sections) |
1029 | error (_("vmap_exec: vmap or table->sections == 0.")); | |
c906108c | 1030 | |
397dbc8b | 1031 | for (i = 0; &table->sections[i] < table->sections_end; i++) |
c906108c | 1032 | { |
397dbc8b | 1033 | if (strcmp (".text", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 1034 | { |
397dbc8b JB |
1035 | table->sections[i].addr += vmap->tstart - vmap->tvma; |
1036 | table->sections[i].endaddr += vmap->tstart - vmap->tvma; | |
c906108c | 1037 | } |
397dbc8b | 1038 | else if (strcmp (".data", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 1039 | { |
397dbc8b JB |
1040 | table->sections[i].addr += vmap->dstart - vmap->dvma; |
1041 | table->sections[i].endaddr += vmap->dstart - vmap->dvma; | |
c906108c | 1042 | } |
397dbc8b | 1043 | else if (strcmp (".bss", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 1044 | { |
397dbc8b JB |
1045 | table->sections[i].addr += vmap->dstart - vmap->dvma; |
1046 | table->sections[i].endaddr += vmap->dstart - vmap->dvma; | |
c906108c SS |
1047 | } |
1048 | } | |
1049 | } | |
7a78ae4e ND |
1050 | |
1051 | /* Set the current architecture from the host running GDB. Called when | |
0df8b418 | 1052 | starting a child process. */ |
7a78ae4e | 1053 | |
136d6dae VP |
1054 | static void (*super_create_inferior) (struct target_ops *,char *exec_file, |
1055 | char *allargs, char **env, int from_tty); | |
1f480a5e | 1056 | static void |
136d6dae VP |
1057 | rs6000_create_inferior (struct target_ops * ops, char *exec_file, |
1058 | char *allargs, char **env, int from_tty) | |
7a78ae4e ND |
1059 | { |
1060 | enum bfd_architecture arch; | |
1061 | unsigned long mach; | |
1062 | bfd abfd; | |
1063 | struct gdbarch_info info; | |
1064 | ||
136d6dae | 1065 | super_create_inferior (ops, exec_file, allargs, env, from_tty); |
1f480a5e | 1066 | |
7a78ae4e ND |
1067 | if (__power_rs ()) |
1068 | { | |
1069 | arch = bfd_arch_rs6000; | |
1070 | mach = bfd_mach_rs6k; | |
1071 | } | |
1072 | else | |
1073 | { | |
1074 | arch = bfd_arch_powerpc; | |
1075 | mach = bfd_mach_ppc; | |
1076 | } | |
19caaa45 PS |
1077 | |
1078 | /* FIXME: schauer/2002-02-25: | |
1079 | We don't know if we are executing a 32 or 64 bit executable, | |
1080 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
1081 | So we have to avoid switching to a new architecture, if the architecture | |
1082 | matches already. | |
1083 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
1084 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
1085 | determine the wordsize. */ | |
1086 | if (exec_bfd) | |
1087 | { | |
1088 | const struct bfd_arch_info *exec_bfd_arch_info; | |
1089 | ||
1090 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
1091 | if (arch == exec_bfd_arch_info->arch) | |
1092 | return; | |
1093 | } | |
1094 | ||
7a78ae4e ND |
1095 | bfd_default_set_arch_mach (&abfd, arch, mach); |
1096 | ||
fb6ecb0f | 1097 | gdbarch_info_init (&info); |
7a78ae4e | 1098 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 1099 | info.abfd = exec_bfd; |
7a78ae4e | 1100 | |
16f33e29 | 1101 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 1102 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
1103 | _("rs6000_create_inferior: failed " |
1104 | "to select architecture")); | |
7a78ae4e ND |
1105 | } |
1106 | ||
c906108c | 1107 | \f |
c5aa993b | 1108 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
8d08c9ce JB |
1109 | |
1110 | This is only applicable to live processes, and is a no-op when | |
1111 | debugging a core file. */ | |
c906108c SS |
1112 | |
1113 | void | |
7a78ae4e | 1114 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 1115 | { |
c18e0d23 | 1116 | int load_segs = 64; /* number of load segments */ |
380b774b | 1117 | int rc; |
7a78ae4e ND |
1118 | LdInfo *ldi = NULL; |
1119 | int arch64 = ARCH64 (); | |
1120 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
1121 | int size; | |
c906108c | 1122 | |
1ba0a4ee JB |
1123 | /* Nothing to do if we are debugging a core file. */ |
1124 | if (!target_has_execution) | |
8d08c9ce JB |
1125 | return; |
1126 | ||
c18e0d23 GM |
1127 | do |
1128 | { | |
7a78ae4e | 1129 | size = load_segs * ldisize; |
3a84337c | 1130 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 1131 | |
7a78ae4e | 1132 | #if 0 |
380b774b GM |
1133 | /* According to my humble theory, AIX has some timing problems and |
1134 | when the user stack grows, kernel doesn't update stack info in time | |
0df8b418 MS |
1135 | and ptrace calls step on user stack. That is why we sleep here a |
1136 | little, and give kernel to update its internals. */ | |
380b774b | 1137 | usleep (36000); |
7a78ae4e ND |
1138 | #endif |
1139 | ||
1140 | if (arch64) | |
8b5790f2 | 1141 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); |
7a78ae4e | 1142 | else |
8b5790f2 | 1143 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); |
c906108c | 1144 | |
c18e0d23 GM |
1145 | if (rc == -1) |
1146 | { | |
380b774b GM |
1147 | if (errno == ENOMEM) |
1148 | load_segs *= 2; | |
1149 | else | |
e2e0b3e5 | 1150 | perror_with_name (_("ptrace ldinfo")); |
c18e0d23 GM |
1151 | } |
1152 | else | |
1153 | { | |
380b774b | 1154 | vmap_ldinfo (ldi); |
0df8b418 | 1155 | vmap_exec (); /* relocate the exec and core sections as well. */ |
c18e0d23 GM |
1156 | } |
1157 | } while (rc == -1); | |
380b774b | 1158 | if (ldi) |
b8c9b27d | 1159 | xfree (ldi); |
c906108c SS |
1160 | } |
1161 | \f | |
1162 | /* Core file stuff. */ | |
1163 | ||
1164 | /* Relocate symtabs and read in shared library info, based on symbols | |
1165 | from the core file. */ | |
1166 | ||
1167 | void | |
7a78ae4e | 1168 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1169 | { |
7be0c536 | 1170 | struct bfd_section *ldinfo_sec; |
c906108c | 1171 | int offset = 0; |
7a78ae4e | 1172 | LdInfo *ldi; |
c906108c | 1173 | struct vmap *vp; |
7a78ae4e ND |
1174 | int arch64 = ARCH64 (); |
1175 | ||
0df8b418 | 1176 | /* Size of a struct ld_info except for the variable-length filename. */ |
7a78ae4e | 1177 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); |
c906108c SS |
1178 | |
1179 | /* Allocated size of buffer. */ | |
7a78ae4e | 1180 | int buffer_size = nonfilesz; |
c906108c SS |
1181 | char *buffer = xmalloc (buffer_size); |
1182 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1183 | |
c906108c SS |
1184 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1185 | if (ldinfo_sec == NULL) | |
1186 | { | |
1187 | bfd_err: | |
1188 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1189 | bfd_errmsg (bfd_get_error ())); | |
1190 | do_cleanups (old); | |
1191 | return; | |
1192 | } | |
1193 | do | |
1194 | { | |
1195 | int i; | |
1196 | int names_found = 0; | |
1197 | ||
1198 | /* Read in everything but the name. */ | |
1199 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1200 | offset, nonfilesz) == 0) |
c906108c SS |
1201 | goto bfd_err; |
1202 | ||
1203 | /* Now the name. */ | |
7a78ae4e | 1204 | i = nonfilesz; |
c906108c SS |
1205 | do |
1206 | { | |
1207 | if (i == buffer_size) | |
1208 | { | |
1209 | buffer_size *= 2; | |
1210 | buffer = xrealloc (buffer, buffer_size); | |
1211 | } | |
1212 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1213 | offset + i, 1) == 0) | |
1214 | goto bfd_err; | |
1215 | if (buffer[i++] == '\0') | |
1216 | ++names_found; | |
c5aa993b JM |
1217 | } |
1218 | while (names_found < 2); | |
c906108c | 1219 | |
7a78ae4e | 1220 | ldi = (LdInfo *) buffer; |
c906108c SS |
1221 | |
1222 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1223 | if (arch64) |
1224 | ldi->l64.ldinfo_fd = -1; | |
1225 | else | |
1226 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1227 | |
c906108c | 1228 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1229 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1230 | vp = vmap; |
1231 | else | |
7a78ae4e | 1232 | vp = add_vmap (ldi); |
c906108c | 1233 | |
0df8b418 | 1234 | /* Process next shared library upon error. */ |
7a78ae4e | 1235 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1236 | if (vp == NULL) |
1237 | continue; | |
1238 | ||
7a78ae4e | 1239 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1240 | |
1241 | /* Unless this is the exec file, | |
c5aa993b | 1242 | add our sections to the section table for the core target. */ |
c906108c SS |
1243 | if (vp != vmap) |
1244 | { | |
0542c86d | 1245 | struct target_section *stp; |
6426a772 | 1246 | |
07b82ea5 | 1247 | stp = deprecated_core_resize_section_table (2); |
c906108c SS |
1248 | |
1249 | stp->bfd = vp->bfd; | |
1250 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1251 | stp->addr = vp->tstart; | |
1252 | stp->endaddr = vp->tend; | |
1253 | stp++; | |
c5aa993b | 1254 | |
c906108c SS |
1255 | stp->bfd = vp->bfd; |
1256 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1257 | stp->addr = vp->dstart; | |
1258 | stp->endaddr = vp->dend; | |
1259 | } | |
1260 | ||
1261 | vmap_symtab (vp); | |
e42dc924 | 1262 | |
06d3b283 UW |
1263 | if (vp != vmap && vp->objfile) |
1264 | observer_notify_new_objfile (vp->objfile); | |
c5aa993b | 1265 | } |
7a78ae4e | 1266 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1267 | vmap_exec (); |
1268 | breakpoint_re_set (); | |
1269 | do_cleanups (old); | |
1270 | } | |
c906108c SS |
1271 | \f |
1272 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1273 | when calling functions in the inferior. | |
1274 | We try to find the relative toc offset of the objfile containing PC | |
1275 | and add the current load address of the data segment from the vmap. */ | |
1276 | ||
1277 | static CORE_ADDR | |
7a78ae4e | 1278 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1279 | { |
1280 | struct vmap *vp; | |
1281 | ||
1282 | for (vp = vmap; vp; vp = vp->nxt) | |
1283 | { | |
1284 | if (pc >= vp->tstart && pc < vp->tend) | |
1285 | { | |
1286 | /* vp->objfile is only NULL for the exec file. */ | |
63807e1d PA |
1287 | return vp->dstart + xcoff_get_toc_offset (vp->objfile == NULL |
1288 | ? symfile_objfile | |
1289 | : vp->objfile); | |
c906108c SS |
1290 | } |
1291 | } | |
8a3fe4f8 | 1292 | error (_("Unable to find TOC entry for pc %s."), hex_string (pc)); |
c906108c SS |
1293 | } |
1294 | \f | |
c906108c | 1295 | |
e1aca11e JB |
1296 | void _initialize_rs6000_nat (void); |
1297 | ||
c906108c | 1298 | void |
7a61a01c | 1299 | _initialize_rs6000_nat (void) |
c906108c | 1300 | { |
037a727e UW |
1301 | struct target_ops *t; |
1302 | ||
1303 | t = inf_ptrace_target (); | |
1304 | t->to_fetch_registers = rs6000_fetch_inferior_registers; | |
1305 | t->to_store_registers = rs6000_store_inferior_registers; | |
1306 | t->to_xfer_partial = rs6000_xfer_partial; | |
1f480a5e UW |
1307 | |
1308 | super_create_inferior = t->to_create_inferior; | |
1309 | t->to_create_inferior = rs6000_create_inferior; | |
1310 | ||
482f7fee UW |
1311 | t->to_wait = rs6000_wait; |
1312 | ||
037a727e UW |
1313 | add_target (t); |
1314 | ||
2ec664f5 MS |
1315 | /* Initialize hook in rs6000-tdep.c for determining the TOC address |
1316 | when calling functions in the inferior. */ | |
7a78ae4e | 1317 | rs6000_find_toc_address_hook = find_toc_address; |
c906108c | 1318 | } |