Commit | Line | Data |
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c906108c | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
4646aa9d | 2 | |
0b302171 JB |
3 | Copyright (C) 1986-1987, 1989, 1991-2004, 2007-2012 Free Software |
4 | Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "inferior.h" | |
23 | #include "target.h" | |
24 | #include "gdbcore.h" | |
25 | #include "xcoffsolib.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
42203e46 | 28 | #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */ |
c906108c | 29 | #include "bfd.h" |
60250e8b | 30 | #include "exceptions.h" |
c906108c | 31 | #include "gdb-stabs.h" |
4e052eda | 32 | #include "regcache.h" |
19caaa45 | 33 | #include "arch-utils.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" | |
55 | #include <sys/core.h> | |
7a78ae4e ND |
56 | #define __LDINFO_PTRACE32__ /* for __ld_info32 */ |
57 | #define __LDINFO_PTRACE64__ /* for __ld_info64 */ | |
c906108c | 58 | #include <sys/ldr.h> |
7a78ae4e | 59 | #include <sys/systemcfg.h> |
c906108c | 60 | |
7a78ae4e ND |
61 | /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for |
62 | debugging 32-bit and 64-bit processes. Define a typedef and macros for | |
0df8b418 | 63 | accessing fields in the appropriate structures. */ |
7a78ae4e ND |
64 | |
65 | /* In 32-bit compilation mode (which is the only mode from which ptrace() | |
0df8b418 | 66 | works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ |
7a78ae4e ND |
67 | |
68 | #ifdef __ld_info32 | |
69 | # define ARCH3264 | |
70 | #endif | |
71 | ||
0df8b418 | 72 | /* Return whether the current architecture is 64-bit. */ |
7a78ae4e ND |
73 | |
74 | #ifndef ARCH3264 | |
75 | # define ARCH64() 0 | |
76 | #else | |
a97b0ac8 | 77 | # define ARCH64() (register_size (target_gdbarch, 0) == 8) |
7a78ae4e ND |
78 | #endif |
79 | ||
0df8b418 | 80 | /* Union of 32-bit and 64-bit versions of ld_info. */ |
7a78ae4e ND |
81 | |
82 | typedef union { | |
83 | #ifndef ARCH3264 | |
84 | struct ld_info l32; | |
85 | struct ld_info l64; | |
86 | #else | |
87 | struct __ld_info32 l32; | |
88 | struct __ld_info64 l64; | |
89 | #endif | |
90 | } LdInfo; | |
91 | ||
92 | /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), | |
93 | declare and initialize a variable named VAR suitable for use as the arch64 | |
0df8b418 | 94 | parameter to the various LDI_*() macros. */ |
7a78ae4e ND |
95 | |
96 | #ifndef ARCH3264 | |
97 | # define ARCH64_DECL(var) | |
98 | #else | |
99 | # define ARCH64_DECL(var) int var = ARCH64 () | |
100 | #endif | |
101 | ||
102 | /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process | |
103 | otherwise. This technique only works for FIELDs with the same data type in | |
0df8b418 | 104 | 32-bit and 64-bit versions of ld_info. */ |
7a78ae4e ND |
105 | |
106 | #ifndef ARCH3264 | |
107 | # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field | |
108 | #else | |
109 | # define LDI_FIELD(ldi, arch64, field) \ | |
110 | (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) | |
111 | #endif | |
112 | ||
113 | /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit | |
0df8b418 | 114 | process otherwise. */ |
7a78ae4e ND |
115 | |
116 | #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) | |
117 | #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) | |
118 | #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) | |
c906108c | 119 | |
a14ed312 | 120 | extern struct vmap *map_vmap (bfd * bf, bfd * arch); |
c906108c | 121 | |
a14ed312 | 122 | static void vmap_exec (void); |
c906108c | 123 | |
7a78ae4e | 124 | static void vmap_ldinfo (LdInfo *); |
c906108c | 125 | |
7a78ae4e | 126 | static struct vmap *add_vmap (LdInfo *); |
c906108c | 127 | |
7a78ae4e | 128 | static int objfile_symbol_add (void *); |
c906108c | 129 | |
a14ed312 | 130 | static void vmap_symtab (struct vmap *); |
c906108c | 131 | |
fb14de7b | 132 | static void exec_one_dummy_insn (struct regcache *); |
c906108c | 133 | |
570b8f7c | 134 | extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); |
c906108c | 135 | |
dd7be90a KB |
136 | /* Given REGNO, a gdb register number, return the corresponding |
137 | number suitable for use as a ptrace() parameter. Return -1 if | |
138 | there's no suitable mapping. Also, set the int pointed to by | |
139 | ISFLOAT to indicate whether REGNO is a floating point register. */ | |
c906108c | 140 | |
dd7be90a | 141 | static int |
206988c4 | 142 | regmap (struct gdbarch *gdbarch, int regno, int *isfloat) |
c5aa993b | 143 | { |
206988c4 | 144 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
145 | |
146 | *isfloat = 0; | |
8bf659e8 JB |
147 | if (tdep->ppc_gp0_regnum <= regno |
148 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
dd7be90a | 149 | return regno; |
383f0f5b JB |
150 | else if (tdep->ppc_fp0_regnum >= 0 |
151 | && tdep->ppc_fp0_regnum <= regno | |
366f009f | 152 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
dd7be90a KB |
153 | { |
154 | *isfloat = 1; | |
366f009f | 155 | return regno - tdep->ppc_fp0_regnum + FPR0; |
dd7be90a | 156 | } |
206988c4 | 157 | else if (regno == gdbarch_pc_regnum (gdbarch)) |
dd7be90a KB |
158 | return IAR; |
159 | else if (regno == tdep->ppc_ps_regnum) | |
160 | return MSR; | |
161 | else if (regno == tdep->ppc_cr_regnum) | |
162 | return CR; | |
163 | else if (regno == tdep->ppc_lr_regnum) | |
164 | return LR; | |
165 | else if (regno == tdep->ppc_ctr_regnum) | |
166 | return CTR; | |
167 | else if (regno == tdep->ppc_xer_regnum) | |
168 | return XER; | |
383f0f5b JB |
169 | else if (tdep->ppc_fpscr_regnum >= 0 |
170 | && regno == tdep->ppc_fpscr_regnum) | |
0e061eef | 171 | return FPSCR; |
dd7be90a KB |
172 | else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum) |
173 | return MQ; | |
174 | else | |
175 | return -1; | |
176 | } | |
c906108c | 177 | |
0df8b418 | 178 | /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 179 | |
7a78ae4e | 180 | static int |
8b5790f2 | 181 | rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf) |
7a78ae4e ND |
182 | { |
183 | int ret = ptrace (req, id, (int *)addr, data, buf); | |
184 | #if 0 | |
8b5790f2 | 185 | printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", |
7a78ae4e ND |
186 | req, id, (unsigned int)addr, data, (unsigned int)buf, ret); |
187 | #endif | |
188 | return ret; | |
189 | } | |
c906108c | 190 | |
0df8b418 | 191 | /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ |
c906108c | 192 | |
7a78ae4e | 193 | static int |
0d16ee5d | 194 | rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf) |
7a78ae4e ND |
195 | { |
196 | #ifdef ARCH3264 | |
197 | int ret = ptracex (req, id, addr, data, buf); | |
198 | #else | |
199 | int ret = 0; | |
200 | #endif | |
201 | #if 0 | |
2244ba2e PM |
202 | printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n", |
203 | req, id, hex_string (addr), data, (unsigned int)buf, ret); | |
7a78ae4e ND |
204 | #endif |
205 | return ret; | |
206 | } | |
c906108c | 207 | |
0df8b418 | 208 | /* Fetch register REGNO from the inferior. */ |
c906108c | 209 | |
7a78ae4e | 210 | static void |
56be3814 | 211 | fetch_register (struct regcache *regcache, int regno) |
7a78ae4e | 212 | { |
8b164abb | 213 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 214 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 215 | int nr, isfloat; |
c906108c | 216 | |
0df8b418 | 217 | /* Retrieved values may be -1, so infer errors from errno. */ |
7a78ae4e | 218 | errno = 0; |
c906108c | 219 | |
206988c4 | 220 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 221 | |
0df8b418 | 222 | /* Floating-point registers. */ |
dd7be90a KB |
223 | if (isfloat) |
224 | rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 225 | |
0df8b418 | 226 | /* Bogus register number. */ |
dd7be90a | 227 | else if (nr < 0) |
2a18e3d9 | 228 | { |
8b164abb | 229 | if (regno >= gdbarch_num_regs (gdbarch)) |
2a18e3d9 EZ |
230 | fprintf_unfiltered (gdb_stderr, |
231 | "gdb error: register no %d not implemented.\n", | |
232 | regno); | |
dd7be90a | 233 | return; |
2a18e3d9 | 234 | } |
c906108c | 235 | |
0df8b418 | 236 | /* Fixed-point registers. */ |
7a78ae4e ND |
237 | else |
238 | { | |
7a78ae4e | 239 | if (!ARCH64 ()) |
0df8b418 MS |
240 | *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), |
241 | (int *) nr, 0, 0); | |
7a78ae4e ND |
242 | else |
243 | { | |
244 | /* PT_READ_GPR requires the buffer parameter to point to long long, | |
0df8b418 | 245 | even if the register is really only 32 bits. */ |
7a78ae4e | 246 | long long buf; |
0d16ee5d | 247 | rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
8b164abb | 248 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
249 | memcpy (addr, &buf, 8); |
250 | else | |
251 | *addr = buf; | |
252 | } | |
253 | } | |
254 | ||
255 | if (!errno) | |
56be3814 | 256 | regcache_raw_supply (regcache, regno, (char *) addr); |
7a78ae4e ND |
257 | else |
258 | { | |
259 | #if 0 | |
0df8b418 | 260 | /* FIXME: this happens 3 times at the start of each 64-bit program. */ |
9b20d036 | 261 | perror (_("ptrace read")); |
7a78ae4e ND |
262 | #endif |
263 | errno = 0; | |
264 | } | |
c906108c SS |
265 | } |
266 | ||
0df8b418 | 267 | /* Store register REGNO back into the inferior. */ |
c906108c | 268 | |
7a78ae4e | 269 | static void |
fb14de7b | 270 | store_register (struct regcache *regcache, int regno) |
c906108c | 271 | { |
8b164abb | 272 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
d9d9c31f | 273 | int addr[MAX_REGISTER_SIZE]; |
dd7be90a | 274 | int nr, isfloat; |
c906108c | 275 | |
11bf77db | 276 | /* Fetch the register's value from the register cache. */ |
56be3814 | 277 | regcache_raw_collect (regcache, regno, addr); |
11bf77db | 278 | |
0df8b418 | 279 | /* -1 can be a successful return value, so infer errors from errno. */ |
c906108c SS |
280 | errno = 0; |
281 | ||
206988c4 | 282 | nr = regmap (gdbarch, regno, &isfloat); |
dd7be90a | 283 | |
0df8b418 | 284 | /* Floating-point registers. */ |
dd7be90a KB |
285 | if (isfloat) |
286 | rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0); | |
c906108c | 287 | |
0df8b418 | 288 | /* Bogus register number. */ |
dd7be90a | 289 | else if (nr < 0) |
7a78ae4e | 290 | { |
8b164abb | 291 | if (regno >= gdbarch_num_regs (gdbarch)) |
7a78ae4e ND |
292 | fprintf_unfiltered (gdb_stderr, |
293 | "gdb error: register no %d not implemented.\n", | |
294 | regno); | |
295 | } | |
c906108c | 296 | |
0df8b418 | 297 | /* Fixed-point registers. */ |
7a78ae4e ND |
298 | else |
299 | { | |
8b164abb | 300 | if (regno == gdbarch_sp_regnum (gdbarch)) |
7a78ae4e ND |
301 | /* Execute one dummy instruction (which is a breakpoint) in inferior |
302 | process to give kernel a chance to do internal housekeeping. | |
303 | Otherwise the following ptrace(2) calls will mess up user stack | |
304 | since kernel will get confused about the bottom of the stack | |
0df8b418 | 305 | (%sp). */ |
fb14de7b | 306 | exec_one_dummy_insn (regcache); |
c906108c | 307 | |
11bf77db KB |
308 | /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors, |
309 | the register's value is passed by value, but for 64-bit inferiors, | |
310 | the address of a buffer containing the value is passed. */ | |
7a78ae4e | 311 | if (!ARCH64 ()) |
0df8b418 MS |
312 | rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), |
313 | (int *) nr, *addr, 0); | |
7a78ae4e | 314 | else |
c906108c | 315 | { |
7a78ae4e | 316 | /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte |
0df8b418 | 317 | area, even if the register is really only 32 bits. */ |
7a78ae4e | 318 | long long buf; |
8b164abb | 319 | if (register_size (gdbarch, regno) == 8) |
7a78ae4e ND |
320 | memcpy (&buf, addr, 8); |
321 | else | |
322 | buf = *addr; | |
0d16ee5d | 323 | rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf); |
c906108c SS |
324 | } |
325 | } | |
326 | ||
7a78ae4e | 327 | if (errno) |
c906108c | 328 | { |
9b20d036 | 329 | perror (_("ptrace write")); |
7a78ae4e | 330 | errno = 0; |
c906108c | 331 | } |
7a78ae4e | 332 | } |
c906108c | 333 | |
7a78ae4e | 334 | /* Read from the inferior all registers if REGNO == -1 and just register |
0df8b418 | 335 | REGNO otherwise. */ |
c906108c | 336 | |
037a727e | 337 | static void |
28439f5e PA |
338 | rs6000_fetch_inferior_registers (struct target_ops *ops, |
339 | struct regcache *regcache, int regno) | |
7a78ae4e | 340 | { |
8b164abb | 341 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 342 | if (regno != -1) |
56be3814 | 343 | fetch_register (regcache, regno); |
7a78ae4e ND |
344 | |
345 | else | |
c906108c | 346 | { |
8b164abb | 347 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e | 348 | |
dd7be90a KB |
349 | /* Read 32 general purpose registers. */ |
350 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 351 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
352 | regno++) |
353 | { | |
56be3814 | 354 | fetch_register (regcache, regno); |
dd7be90a KB |
355 | } |
356 | ||
357 | /* Read general purpose floating point registers. */ | |
383f0f5b JB |
358 | if (tdep->ppc_fp0_regnum >= 0) |
359 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 360 | fetch_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 361 | |
dd7be90a | 362 | /* Read special registers. */ |
8b164abb | 363 | fetch_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
364 | fetch_register (regcache, tdep->ppc_ps_regnum); |
365 | fetch_register (regcache, tdep->ppc_cr_regnum); | |
366 | fetch_register (regcache, tdep->ppc_lr_regnum); | |
367 | fetch_register (regcache, tdep->ppc_ctr_regnum); | |
368 | fetch_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 369 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 370 | fetch_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 371 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 372 | fetch_register (regcache, tdep->ppc_mq_regnum); |
c906108c | 373 | } |
7a78ae4e | 374 | } |
c906108c | 375 | |
7a78ae4e ND |
376 | /* Store our register values back into the inferior. |
377 | If REGNO is -1, do this for all registers. | |
378 | Otherwise, REGNO specifies which register (so we can save time). */ | |
379 | ||
037a727e | 380 | static void |
28439f5e PA |
381 | rs6000_store_inferior_registers (struct target_ops *ops, |
382 | struct regcache *regcache, int regno) | |
7a78ae4e | 383 | { |
8b164abb | 384 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 385 | if (regno != -1) |
56be3814 | 386 | store_register (regcache, regno); |
7a78ae4e ND |
387 | |
388 | else | |
f6077098 | 389 | { |
8b164abb | 390 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
dd7be90a KB |
391 | |
392 | /* Write general purpose registers first. */ | |
393 | for (regno = tdep->ppc_gp0_regnum; | |
8bf659e8 | 394 | regno < tdep->ppc_gp0_regnum + ppc_num_gprs; |
dd7be90a KB |
395 | regno++) |
396 | { | |
56be3814 | 397 | store_register (regcache, regno); |
dd7be90a | 398 | } |
7a78ae4e | 399 | |
dd7be90a | 400 | /* Write floating point registers. */ |
383f0f5b JB |
401 | if (tdep->ppc_fp0_regnum >= 0) |
402 | for (regno = 0; regno < ppc_num_fprs; regno++) | |
56be3814 | 403 | store_register (regcache, tdep->ppc_fp0_regnum + regno); |
7a78ae4e | 404 | |
dd7be90a | 405 | /* Write special registers. */ |
8b164abb | 406 | store_register (regcache, gdbarch_pc_regnum (gdbarch)); |
56be3814 UW |
407 | store_register (regcache, tdep->ppc_ps_regnum); |
408 | store_register (regcache, tdep->ppc_cr_regnum); | |
409 | store_register (regcache, tdep->ppc_lr_regnum); | |
410 | store_register (regcache, tdep->ppc_ctr_regnum); | |
411 | store_register (regcache, tdep->ppc_xer_regnum); | |
383f0f5b | 412 | if (tdep->ppc_fpscr_regnum >= 0) |
56be3814 | 413 | store_register (regcache, tdep->ppc_fpscr_regnum); |
dd7be90a | 414 | if (tdep->ppc_mq_regnum >= 0) |
56be3814 | 415 | store_register (regcache, tdep->ppc_mq_regnum); |
f6077098 | 416 | } |
7a78ae4e | 417 | } |
f6077098 | 418 | |
7a78ae4e | 419 | |
037a727e UW |
420 | /* Attempt a transfer all LEN bytes starting at OFFSET between the |
421 | inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer. | |
422 | Return the number of bytes actually transferred. */ | |
7a78ae4e | 423 | |
037a727e UW |
424 | static LONGEST |
425 | rs6000_xfer_partial (struct target_ops *ops, enum target_object object, | |
426 | const char *annex, gdb_byte *readbuf, | |
427 | const gdb_byte *writebuf, | |
428 | ULONGEST offset, LONGEST len) | |
7a78ae4e | 429 | { |
037a727e | 430 | pid_t pid = ptid_get_pid (inferior_ptid); |
7a78ae4e | 431 | int arch64 = ARCH64 (); |
7a78ae4e | 432 | |
037a727e | 433 | switch (object) |
c906108c | 434 | { |
037a727e UW |
435 | case TARGET_OBJECT_MEMORY: |
436 | { | |
437 | union | |
7a78ae4e | 438 | { |
037a727e UW |
439 | PTRACE_TYPE_RET word; |
440 | gdb_byte byte[sizeof (PTRACE_TYPE_RET)]; | |
441 | } buffer; | |
442 | ULONGEST rounded_offset; | |
443 | LONGEST partial_len; | |
444 | ||
445 | /* Round the start offset down to the next long word | |
446 | boundary. */ | |
447 | rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET); | |
448 | ||
449 | /* Since ptrace will transfer a single word starting at that | |
450 | rounded_offset the partial_len needs to be adjusted down to | |
451 | that (remember this function only does a single transfer). | |
452 | Should the required length be even less, adjust it down | |
453 | again. */ | |
454 | partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset; | |
455 | if (partial_len > len) | |
456 | partial_len = len; | |
457 | ||
458 | if (writebuf) | |
459 | { | |
460 | /* If OFFSET:PARTIAL_LEN is smaller than | |
461 | ROUNDED_OFFSET:WORDSIZE then a read/modify write will | |
462 | be needed. Read in the entire word. */ | |
463 | if (rounded_offset < offset | |
464 | || (offset + partial_len | |
465 | < rounded_offset + sizeof (PTRACE_TYPE_RET))) | |
466 | { | |
467 | /* Need part of initial word -- fetch it. */ | |
468 | if (arch64) | |
469 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
470 | rounded_offset, 0, NULL); | |
471 | else | |
472 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
0df8b418 MS |
473 | (int *) (uintptr_t) |
474 | rounded_offset, | |
037a727e UW |
475 | 0, NULL); |
476 | } | |
477 | ||
478 | /* Copy data to be written over corresponding part of | |
479 | buffer. */ | |
480 | memcpy (buffer.byte + (offset - rounded_offset), | |
481 | writebuf, partial_len); | |
482 | ||
483 | errno = 0; | |
484 | if (arch64) | |
485 | rs6000_ptrace64 (PT_WRITE_D, pid, | |
486 | rounded_offset, buffer.word, NULL); | |
487 | else | |
488 | rs6000_ptrace32 (PT_WRITE_D, pid, | |
0df8b418 MS |
489 | (int *) (uintptr_t) rounded_offset, |
490 | buffer.word, NULL); | |
037a727e UW |
491 | if (errno) |
492 | return 0; | |
493 | } | |
494 | ||
495 | if (readbuf) | |
496 | { | |
497 | errno = 0; | |
498 | if (arch64) | |
499 | buffer.word = rs6000_ptrace64 (PT_READ_I, pid, | |
500 | rounded_offset, 0, NULL); | |
501 | else | |
502 | buffer.word = rs6000_ptrace32 (PT_READ_I, pid, | |
503 | (int *)(uintptr_t)rounded_offset, | |
504 | 0, NULL); | |
505 | if (errno) | |
506 | return 0; | |
507 | ||
508 | /* Copy appropriate bytes out of the buffer. */ | |
509 | memcpy (readbuf, buffer.byte + (offset - rounded_offset), | |
510 | partial_len); | |
511 | } | |
512 | ||
513 | return partial_len; | |
514 | } | |
515 | ||
516 | default: | |
517 | return -1; | |
7a78ae4e | 518 | } |
c906108c SS |
519 | } |
520 | ||
482f7fee UW |
521 | /* Wait for the child specified by PTID to do something. Return the |
522 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
523 | the status in *OURSTATUS. */ | |
524 | ||
525 | static ptid_t | |
117de6a9 | 526 | rs6000_wait (struct target_ops *ops, |
47608cb1 | 527 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
482f7fee UW |
528 | { |
529 | pid_t pid; | |
530 | int status, save_errno; | |
531 | ||
532 | do | |
533 | { | |
534 | set_sigint_trap (); | |
482f7fee UW |
535 | |
536 | do | |
537 | { | |
538 | pid = waitpid (ptid_get_pid (ptid), &status, 0); | |
539 | save_errno = errno; | |
540 | } | |
541 | while (pid == -1 && errno == EINTR); | |
542 | ||
482f7fee UW |
543 | clear_sigint_trap (); |
544 | ||
545 | if (pid == -1) | |
546 | { | |
547 | fprintf_unfiltered (gdb_stderr, | |
548 | _("Child process unexpectedly missing: %s.\n"), | |
549 | safe_strerror (save_errno)); | |
550 | ||
551 | /* Claim it exited with unknown signal. */ | |
552 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
553 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
fb66883a | 554 | return inferior_ptid; |
482f7fee UW |
555 | } |
556 | ||
557 | /* Ignore terminated detached child processes. */ | |
558 | if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid)) | |
559 | pid = -1; | |
560 | } | |
561 | while (pid == -1); | |
562 | ||
563 | /* AIX has a couple of strange returns from wait(). */ | |
564 | ||
565 | /* stop after load" status. */ | |
566 | if (status == 0x57c) | |
567 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
0df8b418 | 568 | /* signal 0. I have no idea why wait(2) returns with this status word. */ |
482f7fee UW |
569 | else if (status == 0x7f) |
570 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
571 | /* A normal waitstatus. Let the usual macros deal with it. */ | |
572 | else | |
573 | store_waitstatus (ourstatus, status); | |
574 | ||
575 | return pid_to_ptid (pid); | |
576 | } | |
037a727e | 577 | |
c906108c SS |
578 | /* Execute one dummy breakpoint instruction. This way we give the kernel |
579 | a chance to do some housekeeping and update inferior's internal data, | |
0df8b418 | 580 | including u_area. */ |
c906108c SS |
581 | |
582 | static void | |
fb14de7b | 583 | exec_one_dummy_insn (struct regcache *regcache) |
c906108c | 584 | { |
4a7622d1 | 585 | #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200 |
c906108c | 586 | |
a6d9a66e | 587 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7a78ae4e | 588 | int ret, status, pid; |
c906108c | 589 | CORE_ADDR prev_pc; |
8181d85f | 590 | void *bp; |
c906108c | 591 | |
0df8b418 | 592 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We |
c906108c | 593 | assume that this address will never be executed again by the real |
0df8b418 | 594 | code. */ |
c906108c | 595 | |
47607d6f | 596 | bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR); |
c906108c | 597 | |
c906108c SS |
598 | /* You might think this could be done with a single ptrace call, and |
599 | you'd be correct for just about every platform I've ever worked | |
600 | on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- | |
601 | the inferior never hits the breakpoint (it's also worth noting | |
602 | powerpc-ibm-aix4.1.3 works correctly). */ | |
fb14de7b UW |
603 | prev_pc = regcache_read_pc (regcache); |
604 | regcache_write_pc (regcache, DUMMY_INSN_ADDR); | |
7a78ae4e | 605 | if (ARCH64 ()) |
8b5790f2 | 606 | ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL); |
7a78ae4e | 607 | else |
0df8b418 MS |
608 | ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), |
609 | (int *) 1, 0, NULL); | |
c906108c | 610 | |
7a78ae4e | 611 | if (ret != 0) |
9b20d036 | 612 | perror (_("pt_continue")); |
c906108c | 613 | |
c5aa993b JM |
614 | do |
615 | { | |
5be4dfca | 616 | pid = waitpid (PIDGET (inferior_ptid), &status, 0); |
c5aa993b | 617 | } |
39f77062 | 618 | while (pid != PIDGET (inferior_ptid)); |
c5aa993b | 619 | |
fb14de7b | 620 | regcache_write_pc (regcache, prev_pc); |
a6d9a66e | 621 | deprecated_remove_raw_breakpoint (gdbarch, bp); |
c906108c | 622 | } |
c906108c | 623 | \f |
7a78ae4e ND |
624 | |
625 | /* Copy information about text and data sections from LDI to VP for a 64-bit | |
0df8b418 | 626 | process if ARCH64 and for a 32-bit process otherwise. */ |
7a78ae4e ND |
627 | |
628 | static void | |
629 | vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) | |
630 | { | |
631 | if (arch64) | |
632 | { | |
633 | vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; | |
634 | vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; | |
635 | vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; | |
636 | vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; | |
637 | } | |
638 | else | |
639 | { | |
640 | vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; | |
641 | vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; | |
642 | vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; | |
643 | vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; | |
644 | } | |
645 | ||
646 | /* The run time loader maps the file header in addition to the text | |
647 | section and returns a pointer to the header in ldinfo_textorg. | |
648 | Adjust the text start address to point to the real start address | |
649 | of the text section. */ | |
650 | vp->tstart += vp->toffs; | |
651 | } | |
652 | ||
0df8b418 | 653 | /* Handle symbol translation on vmapping. */ |
c906108c SS |
654 | |
655 | static void | |
7a78ae4e | 656 | vmap_symtab (struct vmap *vp) |
c906108c | 657 | { |
52f0bd74 | 658 | struct objfile *objfile; |
c906108c SS |
659 | struct section_offsets *new_offsets; |
660 | int i; | |
c5aa993b | 661 | |
c906108c SS |
662 | objfile = vp->objfile; |
663 | if (objfile == NULL) | |
664 | { | |
665 | /* OK, it's not an objfile we opened ourselves. | |
c5aa993b JM |
666 | Currently, that can only happen with the exec file, so |
667 | relocate the symbols for the symfile. */ | |
c906108c SS |
668 | if (symfile_objfile == NULL) |
669 | return; | |
670 | objfile = symfile_objfile; | |
671 | } | |
63f58cc5 | 672 | else if (!vp->loaded) |
0df8b418 | 673 | /* If symbols are not yet loaded, offsets are not yet valid. */ |
63f58cc5 | 674 | return; |
c906108c | 675 | |
9f83329d JB |
676 | new_offsets = |
677 | (struct section_offsets *) | |
678 | alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
c906108c SS |
679 | |
680 | for (i = 0; i < objfile->num_sections; ++i) | |
f0a58b0b | 681 | new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i); |
c5aa993b | 682 | |
c906108c SS |
683 | /* The symbols in the object file are linked to the VMA of the section, |
684 | relocate them VMA relative. */ | |
f0a58b0b EZ |
685 | new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma; |
686 | new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma; | |
687 | new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma; | |
c906108c SS |
688 | |
689 | objfile_relocate (objfile, new_offsets); | |
690 | } | |
691 | \f | |
692 | /* Add symbols for an objfile. */ | |
693 | ||
694 | static int | |
7a78ae4e | 695 | objfile_symbol_add (void *arg) |
c906108c SS |
696 | { |
697 | struct objfile *obj = (struct objfile *) arg; | |
698 | ||
7eedccfa PP |
699 | syms_from_objfile (obj, NULL, 0, 0, 0); |
700 | new_symfile_objfile (obj, 0); | |
c906108c SS |
701 | return 1; |
702 | } | |
703 | ||
63f58cc5 PS |
704 | /* Add symbols for a vmap. Return zero upon error. */ |
705 | ||
706 | int | |
707 | vmap_add_symbols (struct vmap *vp) | |
708 | { | |
709 | if (catch_errors (objfile_symbol_add, vp->objfile, | |
710 | "Error while reading shared library symbols:\n", | |
711 | RETURN_MASK_ALL)) | |
712 | { | |
713 | /* Note this is only done if symbol reading was successful. */ | |
714 | vp->loaded = 1; | |
715 | vmap_symtab (vp); | |
716 | return 1; | |
717 | } | |
718 | return 0; | |
719 | } | |
720 | ||
c906108c SS |
721 | /* Add a new vmap entry based on ldinfo() information. |
722 | ||
723 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
724 | core file), the caller should set it to -1, and we will open the file. | |
725 | ||
726 | Return the vmap new entry. */ | |
727 | ||
728 | static struct vmap * | |
7a78ae4e | 729 | add_vmap (LdInfo *ldi) |
c906108c SS |
730 | { |
731 | bfd *abfd, *last; | |
52f0bd74 | 732 | char *mem, *objname, *filename; |
c906108c SS |
733 | struct objfile *obj; |
734 | struct vmap *vp; | |
7a78ae4e ND |
735 | int fd; |
736 | ARCH64_DECL (arch64); | |
c906108c SS |
737 | |
738 | /* This ldi structure was allocated using alloca() in | |
0df8b418 MS |
739 | xcoff_relocate_symtab(). Now we need to have persistent object |
740 | and member names, so we should save them. */ | |
c906108c | 741 | |
7a78ae4e ND |
742 | filename = LDI_FILENAME (ldi, arch64); |
743 | mem = filename + strlen (filename) + 1; | |
1b36a34b JK |
744 | mem = xstrdup (mem); |
745 | objname = xstrdup (filename); | |
c906108c | 746 | |
7a78ae4e ND |
747 | fd = LDI_FD (ldi, arch64); |
748 | if (fd < 0) | |
c906108c SS |
749 | /* Note that this opens it once for every member; a possible |
750 | enhancement would be to only open it once for every object. */ | |
751 | abfd = bfd_openr (objname, gnutarget); | |
752 | else | |
7a78ae4e | 753 | abfd = bfd_fdopenr (objname, gnutarget, fd); |
c906108c | 754 | if (!abfd) |
63f58cc5 | 755 | { |
8a3fe4f8 | 756 | warning (_("Could not open `%s' as an executable file: %s"), |
63f58cc5 PS |
757 | objname, bfd_errmsg (bfd_get_error ())); |
758 | return NULL; | |
759 | } | |
c906108c | 760 | |
0df8b418 | 761 | /* Make sure we have an object file. */ |
c906108c SS |
762 | |
763 | if (bfd_check_format (abfd, bfd_object)) | |
764 | vp = map_vmap (abfd, 0); | |
765 | ||
766 | else if (bfd_check_format (abfd, bfd_archive)) | |
767 | { | |
768 | last = 0; | |
0df8b418 | 769 | /* FIXME??? am I tossing BFDs? bfd? */ |
c906108c | 770 | while ((last = bfd_openr_next_archived_file (abfd, last))) |
7ecb6532 | 771 | if (strcmp (mem, last->filename) == 0) |
c906108c SS |
772 | break; |
773 | ||
774 | if (!last) | |
775 | { | |
8a3fe4f8 | 776 | warning (_("\"%s\": member \"%s\" missing."), objname, mem); |
c906108c | 777 | bfd_close (abfd); |
63f58cc5 | 778 | return NULL; |
c906108c SS |
779 | } |
780 | ||
c5aa993b | 781 | if (!bfd_check_format (last, bfd_object)) |
c906108c | 782 | { |
8a3fe4f8 | 783 | warning (_("\"%s\": member \"%s\" not in executable format: %s."), |
63f58cc5 PS |
784 | objname, mem, bfd_errmsg (bfd_get_error ())); |
785 | bfd_close (last); | |
786 | bfd_close (abfd); | |
787 | return NULL; | |
c906108c SS |
788 | } |
789 | ||
790 | vp = map_vmap (last, abfd); | |
791 | } | |
792 | else | |
793 | { | |
8a3fe4f8 | 794 | warning (_("\"%s\": not in executable format: %s."), |
63f58cc5 | 795 | objname, bfd_errmsg (bfd_get_error ())); |
c906108c | 796 | bfd_close (abfd); |
63f58cc5 | 797 | return NULL; |
c906108c | 798 | } |
2df3850c | 799 | obj = allocate_objfile (vp->bfd, 0); |
c906108c SS |
800 | vp->objfile = obj; |
801 | ||
63f58cc5 PS |
802 | /* Always add symbols for the main objfile. */ |
803 | if (vp == vmap || auto_solib_add) | |
804 | vmap_add_symbols (vp); | |
c906108c SS |
805 | return vp; |
806 | } | |
807 | \f | |
808 | /* update VMAP info with ldinfo() information | |
809 | Input is ptr to ldinfo() results. */ | |
810 | ||
811 | static void | |
7a78ae4e | 812 | vmap_ldinfo (LdInfo *ldi) |
c906108c SS |
813 | { |
814 | struct stat ii, vi; | |
52f0bd74 | 815 | struct vmap *vp; |
c906108c SS |
816 | int got_one, retried; |
817 | int got_exec_file = 0; | |
7a78ae4e ND |
818 | uint next; |
819 | int arch64 = ARCH64 (); | |
c906108c SS |
820 | |
821 | /* For each *ldi, see if we have a corresponding *vp. | |
822 | If so, update the mapping, and symbol table. | |
823 | If not, add an entry and symbol table. */ | |
824 | ||
c5aa993b JM |
825 | do |
826 | { | |
7a78ae4e | 827 | char *name = LDI_FILENAME (ldi, arch64); |
c5aa993b | 828 | char *memb = name + strlen (name) + 1; |
7a78ae4e | 829 | int fd = LDI_FD (ldi, arch64); |
c5aa993b JM |
830 | |
831 | retried = 0; | |
832 | ||
7a78ae4e | 833 | if (fstat (fd, &ii) < 0) |
c5aa993b JM |
834 | { |
835 | /* The kernel sets ld_info to -1, if the process is still using the | |
0df8b418 | 836 | object, and the object is removed. Keep the symbol info for the |
c5aa993b | 837 | removed object and issue a warning. */ |
8a3fe4f8 | 838 | warning (_("%s (fd=%d) has disappeared, keeping its symbols"), |
7a78ae4e | 839 | name, fd); |
c906108c | 840 | continue; |
c5aa993b JM |
841 | } |
842 | retry: | |
843 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
844 | { | |
845 | struct objfile *objfile; | |
c906108c | 846 | |
c5aa993b | 847 | /* First try to find a `vp', which is the same as in ldinfo. |
0df8b418 MS |
848 | If not the same, just continue and grep the next `vp'. If same, |
849 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
c5aa993b | 850 | found, get out of this for loop, add this ldi entry as a new vmap |
0df8b418 | 851 | (add_vmap) and come back, find its `vp' and so on... */ |
c5aa993b | 852 | |
0df8b418 | 853 | /* The filenames are not always sufficient to match on. */ |
c5aa993b | 854 | |
7ecb6532 MD |
855 | if ((name[0] == '/' && strcmp (name, vp->name) != 0) |
856 | || (memb[0] && strcmp (memb, vp->member) != 0)) | |
c906108c | 857 | continue; |
c906108c | 858 | |
c5aa993b JM |
859 | /* See if we are referring to the same file. |
860 | We have to check objfile->obfd, symfile.c:reread_symbols might | |
861 | have updated the obfd after a change. */ | |
862 | objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; | |
863 | if (objfile == NULL | |
864 | || objfile->obfd == NULL | |
865 | || bfd_stat (objfile->obfd, &vi) < 0) | |
866 | { | |
8a3fe4f8 | 867 | warning (_("Unable to stat %s, keeping its symbols"), name); |
c5aa993b JM |
868 | continue; |
869 | } | |
c906108c | 870 | |
c5aa993b JM |
871 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
872 | continue; | |
c906108c | 873 | |
c5aa993b | 874 | if (!retried) |
7a78ae4e | 875 | close (fd); |
c906108c | 876 | |
c5aa993b | 877 | ++got_one; |
c906108c | 878 | |
c5aa993b | 879 | /* Found a corresponding VMAP. Remap! */ |
c906108c | 880 | |
7a78ae4e | 881 | vmap_secs (vp, ldi, arch64); |
c906108c | 882 | |
c5aa993b JM |
883 | /* The objfile is only NULL for the exec file. */ |
884 | if (vp->objfile == NULL) | |
885 | got_exec_file = 1; | |
c906108c | 886 | |
0df8b418 | 887 | /* relocate symbol table(s). */ |
c5aa993b | 888 | vmap_symtab (vp); |
c906108c | 889 | |
e42dc924 | 890 | /* Announce new object files. Doing this after symbol relocation |
2ec664f5 | 891 | makes aix-thread.c's job easier. */ |
06d3b283 UW |
892 | if (vp->objfile) |
893 | observer_notify_new_objfile (vp->objfile); | |
e42dc924 | 894 | |
c5aa993b JM |
895 | /* There may be more, so we don't break out of the loop. */ |
896 | } | |
897 | ||
0df8b418 MS |
898 | /* If there was no matching *vp, we must perforce create the |
899 | sucker(s). */ | |
c5aa993b JM |
900 | if (!got_one && !retried) |
901 | { | |
902 | add_vmap (ldi); | |
903 | ++retried; | |
904 | goto retry; | |
905 | } | |
906 | } | |
7a78ae4e ND |
907 | while ((next = LDI_NEXT (ldi, arch64)) |
908 | && (ldi = (void *) (next + (char *) ldi))); | |
c906108c SS |
909 | |
910 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it | |
911 | is unlikely that the symbol file is relocated to the proper | |
912 | address. And we might have attached to a process which is | |
913 | running a different copy of the same executable. */ | |
914 | if (symfile_objfile != NULL && !got_exec_file) | |
915 | { | |
8a3fe4f8 | 916 | warning (_("Symbol file %s\nis not mapped; discarding it.\n\ |
c906108c SS |
917 | If in fact that file has symbols which the mapped files listed by\n\ |
918 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
919 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
8a3fe4f8 | 920 | symbols to the proper address)."), |
f5a96129 | 921 | symfile_objfile->name); |
c906108c | 922 | free_objfile (symfile_objfile); |
adb7f338 | 923 | gdb_assert (symfile_objfile == NULL); |
c906108c SS |
924 | } |
925 | breakpoint_re_set (); | |
926 | } | |
927 | \f | |
0df8b418 | 928 | /* As well as symbol tables, exec_sections need relocation. After |
c906108c | 929 | the inferior process' termination, there will be a relocated symbol |
0df8b418 | 930 | table exist with no corresponding inferior process. At that time, we |
c906108c SS |
931 | need to use `exec' bfd, rather than the inferior process's memory space |
932 | to look up symbols. | |
933 | ||
934 | `exec_sections' need to be relocated only once, as long as the exec | |
0df8b418 | 935 | file remains unchanged. */ |
c906108c SS |
936 | |
937 | static void | |
7a78ae4e | 938 | vmap_exec (void) |
c906108c SS |
939 | { |
940 | static bfd *execbfd; | |
941 | int i; | |
397dbc8b | 942 | struct target_section_table *table = target_get_section_table (&exec_ops); |
c906108c SS |
943 | |
944 | if (execbfd == exec_bfd) | |
945 | return; | |
946 | ||
947 | execbfd = exec_bfd; | |
948 | ||
397dbc8b JB |
949 | if (!vmap || !table->sections) |
950 | error (_("vmap_exec: vmap or table->sections == 0.")); | |
c906108c | 951 | |
397dbc8b | 952 | for (i = 0; &table->sections[i] < table->sections_end; i++) |
c906108c | 953 | { |
397dbc8b | 954 | if (strcmp (".text", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 955 | { |
397dbc8b JB |
956 | table->sections[i].addr += vmap->tstart - vmap->tvma; |
957 | table->sections[i].endaddr += vmap->tstart - vmap->tvma; | |
c906108c | 958 | } |
397dbc8b | 959 | else if (strcmp (".data", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 960 | { |
397dbc8b JB |
961 | table->sections[i].addr += vmap->dstart - vmap->dvma; |
962 | table->sections[i].endaddr += vmap->dstart - vmap->dvma; | |
c906108c | 963 | } |
397dbc8b | 964 | else if (strcmp (".bss", table->sections[i].the_bfd_section->name) == 0) |
c906108c | 965 | { |
397dbc8b JB |
966 | table->sections[i].addr += vmap->dstart - vmap->dvma; |
967 | table->sections[i].endaddr += vmap->dstart - vmap->dvma; | |
c906108c SS |
968 | } |
969 | } | |
970 | } | |
7a78ae4e ND |
971 | |
972 | /* Set the current architecture from the host running GDB. Called when | |
0df8b418 | 973 | starting a child process. */ |
7a78ae4e | 974 | |
136d6dae VP |
975 | static void (*super_create_inferior) (struct target_ops *,char *exec_file, |
976 | char *allargs, char **env, int from_tty); | |
1f480a5e | 977 | static void |
136d6dae VP |
978 | rs6000_create_inferior (struct target_ops * ops, char *exec_file, |
979 | char *allargs, char **env, int from_tty) | |
7a78ae4e ND |
980 | { |
981 | enum bfd_architecture arch; | |
982 | unsigned long mach; | |
983 | bfd abfd; | |
984 | struct gdbarch_info info; | |
985 | ||
136d6dae | 986 | super_create_inferior (ops, exec_file, allargs, env, from_tty); |
1f480a5e | 987 | |
7a78ae4e ND |
988 | if (__power_rs ()) |
989 | { | |
990 | arch = bfd_arch_rs6000; | |
991 | mach = bfd_mach_rs6k; | |
992 | } | |
993 | else | |
994 | { | |
995 | arch = bfd_arch_powerpc; | |
996 | mach = bfd_mach_ppc; | |
997 | } | |
19caaa45 PS |
998 | |
999 | /* FIXME: schauer/2002-02-25: | |
1000 | We don't know if we are executing a 32 or 64 bit executable, | |
1001 | and have no way to pass the proper word size to rs6000_gdbarch_init. | |
1002 | So we have to avoid switching to a new architecture, if the architecture | |
1003 | matches already. | |
1004 | Blindly calling rs6000_gdbarch_init used to work in older versions of | |
1005 | GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to | |
1006 | determine the wordsize. */ | |
1007 | if (exec_bfd) | |
1008 | { | |
1009 | const struct bfd_arch_info *exec_bfd_arch_info; | |
1010 | ||
1011 | exec_bfd_arch_info = bfd_get_arch_info (exec_bfd); | |
1012 | if (arch == exec_bfd_arch_info->arch) | |
1013 | return; | |
1014 | } | |
1015 | ||
7a78ae4e ND |
1016 | bfd_default_set_arch_mach (&abfd, arch, mach); |
1017 | ||
fb6ecb0f | 1018 | gdbarch_info_init (&info); |
7a78ae4e | 1019 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
7aea86e6 | 1020 | info.abfd = exec_bfd; |
7a78ae4e | 1021 | |
16f33e29 | 1022 | if (!gdbarch_update_p (info)) |
e2e0b3e5 | 1023 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
1024 | _("rs6000_create_inferior: failed " |
1025 | "to select architecture")); | |
7a78ae4e ND |
1026 | } |
1027 | ||
c906108c | 1028 | \f |
c5aa993b | 1029 | /* xcoff_relocate_symtab - hook for symbol table relocation. |
8d08c9ce JB |
1030 | |
1031 | This is only applicable to live processes, and is a no-op when | |
1032 | debugging a core file. */ | |
c906108c SS |
1033 | |
1034 | void | |
7a78ae4e | 1035 | xcoff_relocate_symtab (unsigned int pid) |
c906108c | 1036 | { |
c18e0d23 | 1037 | int load_segs = 64; /* number of load segments */ |
380b774b | 1038 | int rc; |
7a78ae4e ND |
1039 | LdInfo *ldi = NULL; |
1040 | int arch64 = ARCH64 (); | |
1041 | int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); | |
1042 | int size; | |
c906108c | 1043 | |
1ba0a4ee JB |
1044 | /* Nothing to do if we are debugging a core file. */ |
1045 | if (!target_has_execution) | |
8d08c9ce JB |
1046 | return; |
1047 | ||
c18e0d23 GM |
1048 | do |
1049 | { | |
7a78ae4e | 1050 | size = load_segs * ldisize; |
3a84337c | 1051 | ldi = (void *) xrealloc (ldi, size); |
c906108c | 1052 | |
7a78ae4e | 1053 | #if 0 |
380b774b GM |
1054 | /* According to my humble theory, AIX has some timing problems and |
1055 | when the user stack grows, kernel doesn't update stack info in time | |
0df8b418 MS |
1056 | and ptrace calls step on user stack. That is why we sleep here a |
1057 | little, and give kernel to update its internals. */ | |
380b774b | 1058 | usleep (36000); |
7a78ae4e ND |
1059 | #endif |
1060 | ||
1061 | if (arch64) | |
8b5790f2 | 1062 | rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); |
7a78ae4e | 1063 | else |
8b5790f2 | 1064 | rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); |
c906108c | 1065 | |
c18e0d23 GM |
1066 | if (rc == -1) |
1067 | { | |
380b774b GM |
1068 | if (errno == ENOMEM) |
1069 | load_segs *= 2; | |
1070 | else | |
e2e0b3e5 | 1071 | perror_with_name (_("ptrace ldinfo")); |
c18e0d23 GM |
1072 | } |
1073 | else | |
1074 | { | |
380b774b | 1075 | vmap_ldinfo (ldi); |
0df8b418 | 1076 | vmap_exec (); /* relocate the exec and core sections as well. */ |
c18e0d23 GM |
1077 | } |
1078 | } while (rc == -1); | |
380b774b | 1079 | if (ldi) |
b8c9b27d | 1080 | xfree (ldi); |
c906108c SS |
1081 | } |
1082 | \f | |
1083 | /* Core file stuff. */ | |
1084 | ||
1085 | /* Relocate symtabs and read in shared library info, based on symbols | |
1086 | from the core file. */ | |
1087 | ||
1088 | void | |
7a78ae4e | 1089 | xcoff_relocate_core (struct target_ops *target) |
c906108c | 1090 | { |
7be0c536 | 1091 | struct bfd_section *ldinfo_sec; |
c906108c | 1092 | int offset = 0; |
7a78ae4e | 1093 | LdInfo *ldi; |
c906108c | 1094 | struct vmap *vp; |
7a78ae4e ND |
1095 | int arch64 = ARCH64 (); |
1096 | ||
0df8b418 | 1097 | /* Size of a struct ld_info except for the variable-length filename. */ |
7a78ae4e | 1098 | int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); |
c906108c SS |
1099 | |
1100 | /* Allocated size of buffer. */ | |
7a78ae4e | 1101 | int buffer_size = nonfilesz; |
c906108c SS |
1102 | char *buffer = xmalloc (buffer_size); |
1103 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
c5aa993b | 1104 | |
c906108c SS |
1105 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); |
1106 | if (ldinfo_sec == NULL) | |
1107 | { | |
1108 | bfd_err: | |
1109 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", | |
1110 | bfd_errmsg (bfd_get_error ())); | |
1111 | do_cleanups (old); | |
1112 | return; | |
1113 | } | |
1114 | do | |
1115 | { | |
1116 | int i; | |
1117 | int names_found = 0; | |
1118 | ||
1119 | /* Read in everything but the name. */ | |
1120 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
7a78ae4e | 1121 | offset, nonfilesz) == 0) |
c906108c SS |
1122 | goto bfd_err; |
1123 | ||
1124 | /* Now the name. */ | |
7a78ae4e | 1125 | i = nonfilesz; |
c906108c SS |
1126 | do |
1127 | { | |
1128 | if (i == buffer_size) | |
1129 | { | |
1130 | buffer_size *= 2; | |
1131 | buffer = xrealloc (buffer, buffer_size); | |
1132 | } | |
1133 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
1134 | offset + i, 1) == 0) | |
1135 | goto bfd_err; | |
1136 | if (buffer[i++] == '\0') | |
1137 | ++names_found; | |
c5aa993b JM |
1138 | } |
1139 | while (names_found < 2); | |
c906108c | 1140 | |
7a78ae4e | 1141 | ldi = (LdInfo *) buffer; |
c906108c SS |
1142 | |
1143 | /* Can't use a file descriptor from the core file; need to open it. */ | |
7a78ae4e ND |
1144 | if (arch64) |
1145 | ldi->l64.ldinfo_fd = -1; | |
1146 | else | |
1147 | ldi->l32.ldinfo_fd = -1; | |
c5aa993b | 1148 | |
c906108c | 1149 | /* The first ldinfo is for the exec file, allocated elsewhere. */ |
63f58cc5 | 1150 | if (offset == 0 && vmap != NULL) |
c906108c SS |
1151 | vp = vmap; |
1152 | else | |
7a78ae4e | 1153 | vp = add_vmap (ldi); |
c906108c | 1154 | |
0df8b418 | 1155 | /* Process next shared library upon error. */ |
7a78ae4e | 1156 | offset += LDI_NEXT (ldi, arch64); |
63f58cc5 PS |
1157 | if (vp == NULL) |
1158 | continue; | |
1159 | ||
7a78ae4e | 1160 | vmap_secs (vp, ldi, arch64); |
c906108c SS |
1161 | |
1162 | /* Unless this is the exec file, | |
c5aa993b | 1163 | add our sections to the section table for the core target. */ |
c906108c SS |
1164 | if (vp != vmap) |
1165 | { | |
0542c86d | 1166 | struct target_section *stp; |
6426a772 | 1167 | |
07b82ea5 | 1168 | stp = deprecated_core_resize_section_table (2); |
c906108c SS |
1169 | |
1170 | stp->bfd = vp->bfd; | |
1171 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); | |
1172 | stp->addr = vp->tstart; | |
1173 | stp->endaddr = vp->tend; | |
1174 | stp++; | |
c5aa993b | 1175 | |
c906108c SS |
1176 | stp->bfd = vp->bfd; |
1177 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); | |
1178 | stp->addr = vp->dstart; | |
1179 | stp->endaddr = vp->dend; | |
1180 | } | |
1181 | ||
1182 | vmap_symtab (vp); | |
e42dc924 | 1183 | |
06d3b283 UW |
1184 | if (vp != vmap && vp->objfile) |
1185 | observer_notify_new_objfile (vp->objfile); | |
c5aa993b | 1186 | } |
7a78ae4e | 1187 | while (LDI_NEXT (ldi, arch64) != 0); |
c906108c SS |
1188 | vmap_exec (); |
1189 | breakpoint_re_set (); | |
1190 | do_cleanups (old); | |
1191 | } | |
c906108c SS |
1192 | \f |
1193 | /* Under AIX, we have to pass the correct TOC pointer to a function | |
1194 | when calling functions in the inferior. | |
1195 | We try to find the relative toc offset of the objfile containing PC | |
1196 | and add the current load address of the data segment from the vmap. */ | |
1197 | ||
1198 | static CORE_ADDR | |
7a78ae4e | 1199 | find_toc_address (CORE_ADDR pc) |
c906108c SS |
1200 | { |
1201 | struct vmap *vp; | |
1202 | ||
1203 | for (vp = vmap; vp; vp = vp->nxt) | |
1204 | { | |
1205 | if (pc >= vp->tstart && pc < vp->tend) | |
1206 | { | |
1207 | /* vp->objfile is only NULL for the exec file. */ | |
63807e1d PA |
1208 | return vp->dstart + xcoff_get_toc_offset (vp->objfile == NULL |
1209 | ? symfile_objfile | |
1210 | : vp->objfile); | |
c906108c SS |
1211 | } |
1212 | } | |
8a3fe4f8 | 1213 | error (_("Unable to find TOC entry for pc %s."), hex_string (pc)); |
c906108c SS |
1214 | } |
1215 | \f | |
c906108c | 1216 | |
e1aca11e JB |
1217 | void _initialize_rs6000_nat (void); |
1218 | ||
c906108c | 1219 | void |
7a61a01c | 1220 | _initialize_rs6000_nat (void) |
c906108c | 1221 | { |
037a727e UW |
1222 | struct target_ops *t; |
1223 | ||
1224 | t = inf_ptrace_target (); | |
1225 | t->to_fetch_registers = rs6000_fetch_inferior_registers; | |
1226 | t->to_store_registers = rs6000_store_inferior_registers; | |
1227 | t->to_xfer_partial = rs6000_xfer_partial; | |
1f480a5e UW |
1228 | |
1229 | super_create_inferior = t->to_create_inferior; | |
1230 | t->to_create_inferior = rs6000_create_inferior; | |
1231 | ||
482f7fee UW |
1232 | t->to_wait = rs6000_wait; |
1233 | ||
037a727e UW |
1234 | add_target (t); |
1235 | ||
2ec664f5 MS |
1236 | /* Initialize hook in rs6000-tdep.c for determining the TOC address |
1237 | when calling functions in the inferior. */ | |
7a78ae4e | 1238 | rs6000_find_toc_address_hook = find_toc_address; |
c906108c | 1239 | } |