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1b883d35 KW |
1 | /* nto-tdep.c - general QNX Neutrino target functionality. |
2 | ||
0fb0cc75 | 3 | Copyright (C) 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc. |
1b883d35 KW |
4 | |
5 | Contributed by QNX Software Systems Ltd. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
1b883d35 KW |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1b883d35 | 21 | |
b4d5ed91 | 22 | #include "defs.h" |
47979a4b | 23 | #include "gdb_stat.h" |
1b883d35 KW |
24 | #include "gdb_string.h" |
25 | #include "nto-tdep.h" | |
26 | #include "top.h" | |
27 | #include "cli/cli-decode.h" | |
28 | #include "cli/cli-cmds.h" | |
29 | #include "inferior.h" | |
30 | #include "gdbarch.h" | |
31 | #include "bfd.h" | |
32 | #include "elf-bfd.h" | |
33 | #include "solib-svr4.h" | |
34 | #include "gdbcore.h" | |
238ae9af UW |
35 | #include "objfiles.h" |
36 | ||
37 | #include <string.h> | |
1b883d35 KW |
38 | |
39 | #ifdef __CYGWIN__ | |
40 | #include <sys/cygwin.h> | |
41 | #endif | |
42 | ||
43 | #ifdef __CYGWIN__ | |
44 | static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6"; | |
45 | #elif defined(__sun__) || defined(linux) | |
46 | static char default_nto_target[] = "/opt/QNXsdk/target/qnx6"; | |
47 | #else | |
48 | static char default_nto_target[] = ""; | |
49 | #endif | |
50 | ||
51 | struct nto_target_ops current_nto_target; | |
52 | ||
53 | static char * | |
54 | nto_target (void) | |
55 | { | |
56 | char *p = getenv ("QNX_TARGET"); | |
57 | ||
58 | #ifdef __CYGWIN__ | |
59 | static char buf[PATH_MAX]; | |
60 | if (p) | |
61 | cygwin_conv_to_posix_path (p, buf); | |
62 | else | |
63 | cygwin_conv_to_posix_path (default_nto_target, buf); | |
64 | return buf; | |
65 | #else | |
66 | return p ? p : default_nto_target; | |
67 | #endif | |
68 | } | |
69 | ||
d737fd7f | 70 | void |
3d171c85 | 71 | nto_set_target (struct nto_target_ops *targ) |
d737fd7f KW |
72 | { |
73 | nto_regset_id = targ->regset_id; | |
74 | nto_supply_gregset = targ->supply_gregset; | |
75 | nto_supply_fpregset = targ->supply_fpregset; | |
76 | nto_supply_altregset = targ->supply_altregset; | |
77 | nto_supply_regset = targ->supply_regset; | |
78 | nto_register_area = targ->register_area; | |
79 | nto_regset_fill = targ->regset_fill; | |
80 | nto_fetch_link_map_offsets = targ->fetch_link_map_offsets; | |
81 | } | |
82 | ||
1b883d35 KW |
83 | /* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86, |
84 | CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */ | |
85 | int | |
86 | nto_map_arch_to_cputype (const char *arch) | |
87 | { | |
88 | if (!strcmp (arch, "i386") || !strcmp (arch, "x86")) | |
89 | return CPUTYPE_X86; | |
192cdb19 | 90 | if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc")) |
1b883d35 KW |
91 | return CPUTYPE_PPC; |
92 | if (!strcmp (arch, "mips")) | |
93 | return CPUTYPE_MIPS; | |
94 | if (!strcmp (arch, "arm")) | |
95 | return CPUTYPE_ARM; | |
96 | if (!strcmp (arch, "sh")) | |
97 | return CPUTYPE_SH; | |
98 | return CPUTYPE_UNKNOWN; | |
99 | } | |
100 | ||
101 | int | |
102 | nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname) | |
103 | { | |
d737fd7f | 104 | char *buf, *arch_path, *nto_root, *endian, *base; |
1b883d35 | 105 | const char *arch; |
d737fd7f KW |
106 | int ret; |
107 | #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll" | |
1b883d35 KW |
108 | |
109 | nto_root = nto_target (); | |
1cf3db46 | 110 | if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, "i386") == 0) |
1b883d35 KW |
111 | { |
112 | arch = "x86"; | |
113 | endian = ""; | |
114 | } | |
1cf3db46 | 115 | else if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 116 | "rs6000") == 0 |
1cf3db46 | 117 | || strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 118 | "powerpc") == 0) |
1b883d35 KW |
119 | { |
120 | arch = "ppc"; | |
121 | endian = "be"; | |
122 | } | |
123 | else | |
124 | { | |
1cf3db46 UW |
125 | arch = gdbarch_bfd_arch_info (target_gdbarch)->arch_name; |
126 | endian = gdbarch_byte_order (target_gdbarch) | |
4c6b5505 | 127 | == BFD_ENDIAN_BIG ? "be" : "le"; |
1b883d35 KW |
128 | } |
129 | ||
d737fd7f KW |
130 | /* In case nto_root is short, add strlen(solib) |
131 | so we can reuse arch_path below. */ | |
132 | arch_path = | |
133 | alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 + | |
134 | strlen (solib)); | |
1b883d35 KW |
135 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); |
136 | ||
d737fd7f KW |
137 | buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1); |
138 | sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path, | |
1b883d35 KW |
139 | arch_path); |
140 | ||
d737fd7f KW |
141 | /* Don't assume basename() isn't destructive. */ |
142 | base = strrchr (solib, '/'); | |
143 | if (!base) | |
144 | base = solib; | |
145 | else | |
146 | base++; /* Skip over '/'. */ | |
147 | ||
148 | ret = openp (buf, 1, base, o_flags, 0, temp_pathname); | |
149 | if (ret < 0 && base != solib) | |
150 | { | |
151 | sprintf (arch_path, "/%s", solib); | |
152 | ret = open (arch_path, o_flags, 0); | |
153 | if (temp_pathname) | |
154 | { | |
155 | if (ret >= 0) | |
156 | *temp_pathname = gdb_realpath (arch_path); | |
157 | else | |
158 | **temp_pathname = '\0'; | |
159 | } | |
160 | } | |
161 | return ret; | |
1b883d35 KW |
162 | } |
163 | ||
164 | void | |
165 | nto_init_solib_absolute_prefix (void) | |
166 | { | |
167 | char buf[PATH_MAX * 2], arch_path[PATH_MAX]; | |
168 | char *nto_root, *endian; | |
169 | const char *arch; | |
170 | ||
171 | nto_root = nto_target (); | |
1cf3db46 | 172 | if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, "i386") == 0) |
1b883d35 KW |
173 | { |
174 | arch = "x86"; | |
175 | endian = ""; | |
176 | } | |
1cf3db46 | 177 | else if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 178 | "rs6000") == 0 |
1cf3db46 | 179 | || strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 180 | "powerpc") == 0) |
1b883d35 KW |
181 | { |
182 | arch = "ppc"; | |
183 | endian = "be"; | |
184 | } | |
185 | else | |
186 | { | |
1cf3db46 UW |
187 | arch = gdbarch_bfd_arch_info (target_gdbarch)->arch_name; |
188 | endian = gdbarch_byte_order (target_gdbarch) | |
4c6b5505 | 189 | == BFD_ENDIAN_BIG ? "be" : "le"; |
1b883d35 KW |
190 | } |
191 | ||
192 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); | |
193 | ||
194 | sprintf (buf, "set solib-absolute-prefix %s", arch_path); | |
195 | execute_command (buf, 0); | |
196 | } | |
197 | ||
198 | char ** | |
14ef7606 AR |
199 | nto_parse_redirection (char *pargv[], const char **pin, const char **pout, |
200 | const char **perr) | |
1b883d35 KW |
201 | { |
202 | char **argv; | |
203 | char *in, *out, *err, *p; | |
204 | int argc, i, n; | |
205 | ||
206 | for (n = 0; pargv[n]; n++); | |
207 | if (n == 0) | |
208 | return NULL; | |
209 | in = ""; | |
210 | out = ""; | |
211 | err = ""; | |
212 | ||
213 | argv = xcalloc (n + 1, sizeof argv[0]); | |
214 | argc = n; | |
215 | for (i = 0, n = 0; n < argc; n++) | |
216 | { | |
217 | p = pargv[n]; | |
218 | if (*p == '>') | |
219 | { | |
220 | p++; | |
221 | if (*p) | |
222 | out = p; | |
223 | else | |
224 | out = pargv[++n]; | |
225 | } | |
226 | else if (*p == '<') | |
227 | { | |
228 | p++; | |
229 | if (*p) | |
230 | in = p; | |
231 | else | |
232 | in = pargv[++n]; | |
233 | } | |
234 | else if (*p++ == '2' && *p++ == '>') | |
235 | { | |
236 | if (*p == '&' && *(p + 1) == '1') | |
237 | err = out; | |
238 | else if (*p) | |
239 | err = p; | |
240 | else | |
241 | err = pargv[++n]; | |
242 | } | |
243 | else | |
244 | argv[i++] = pargv[n]; | |
245 | } | |
246 | *pin = in; | |
247 | *pout = out; | |
248 | *perr = err; | |
249 | return argv; | |
250 | } | |
251 | ||
252 | /* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from | |
253 | solib-svr4.c to support nto_relocate_section_addresses | |
254 | which is different from the svr4 version. */ | |
255 | ||
ebd67d87 AR |
256 | /* Link map info to include in an allocated so_list entry */ |
257 | ||
1b883d35 | 258 | struct lm_info |
ebd67d87 AR |
259 | { |
260 | /* Pointer to copy of link map from inferior. The type is char * | |
261 | rather than void *, so that we may use byte offsets to find the | |
262 | various fields without the need for a cast. */ | |
263 | gdb_byte *lm; | |
264 | ||
265 | /* Amount by which addresses in the binary should be relocated to | |
266 | match the inferior. This could most often be taken directly | |
267 | from lm, but when prelinking is involved and the prelink base | |
268 | address changes, we may need a different offset, we want to | |
269 | warn about the difference and compute it only once. */ | |
270 | CORE_ADDR l_addr; | |
271 | ||
272 | /* The target location of lm. */ | |
273 | CORE_ADDR lm_addr; | |
274 | }; | |
275 | ||
1b883d35 KW |
276 | |
277 | static CORE_ADDR | |
278 | LM_ADDR (struct so_list *so) | |
279 | { | |
ebd67d87 AR |
280 | if (so->lm_info->l_addr == (CORE_ADDR)-1) |
281 | { | |
282 | struct link_map_offsets *lmo = nto_fetch_link_map_offsets (); | |
b6da22b0 | 283 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
1b883d35 | 284 | |
ebd67d87 | 285 | so->lm_info->l_addr = |
b6da22b0 | 286 | extract_typed_address (so->lm_info->lm + lmo->l_addr_offset, ptr_type); |
ebd67d87 AR |
287 | } |
288 | return so->lm_info->l_addr; | |
1b883d35 KW |
289 | } |
290 | ||
291 | static CORE_ADDR | |
292 | nto_truncate_ptr (CORE_ADDR addr) | |
293 | { | |
1cf3db46 | 294 | if (gdbarch_ptr_bit (target_gdbarch) == sizeof (CORE_ADDR) * 8) |
1b883d35 KW |
295 | /* We don't need to truncate anything, and the bit twiddling below |
296 | will fail due to overflow problems. */ | |
297 | return addr; | |
298 | else | |
1cf3db46 | 299 | return addr & (((CORE_ADDR) 1 << gdbarch_ptr_bit (target_gdbarch)) - 1); |
1b883d35 KW |
300 | } |
301 | ||
63807e1d | 302 | static Elf_Internal_Phdr * |
1b883d35 KW |
303 | find_load_phdr (bfd *abfd) |
304 | { | |
305 | Elf_Internal_Phdr *phdr; | |
306 | unsigned int i; | |
307 | ||
308 | if (!elf_tdata (abfd)) | |
309 | return NULL; | |
310 | ||
311 | phdr = elf_tdata (abfd)->phdr; | |
312 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
313 | { | |
314 | if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X)) | |
315 | return phdr; | |
316 | } | |
317 | return NULL; | |
318 | } | |
319 | ||
320 | void | |
321 | nto_relocate_section_addresses (struct so_list *so, struct section_table *sec) | |
322 | { | |
323 | /* Neutrino treats the l_addr base address field in link.h as different than | |
324 | the base address in the System V ABI and so the offset needs to be | |
325 | calculated and applied to relocations. */ | |
326 | Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd); | |
327 | unsigned vaddr = phdr ? phdr->p_vaddr : 0; | |
328 | ||
329 | sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr); | |
330 | sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr); | |
331 | } | |
332 | ||
d737fd7f KW |
333 | /* This is cheating a bit because our linker code is in libc.so. If we |
334 | ever implement lazy linking, this may need to be re-examined. */ | |
335 | int | |
336 | nto_in_dynsym_resolve_code (CORE_ADDR pc) | |
337 | { | |
338 | if (in_plt_section (pc, NULL)) | |
339 | return 1; | |
340 | return 0; | |
341 | } | |
342 | ||
343 | void | |
344 | nto_generic_supply_gpregset (const struct regset *regset, | |
345 | struct regcache *regcache, int regnum, | |
346 | const void *gregs, size_t len) | |
347 | { | |
348 | } | |
349 | ||
350 | void | |
351 | nto_generic_supply_fpregset (const struct regset *regset, | |
352 | struct regcache *regcache, int regnum, | |
353 | const void *fpregs, size_t len) | |
354 | { | |
355 | } | |
356 | ||
357 | void | |
358 | nto_generic_supply_altregset (const struct regset *regset, | |
359 | struct regcache *regcache, int regnum, | |
360 | const void *altregs, size_t len) | |
361 | { | |
362 | } | |
363 | ||
364 | void | |
468e3d51 | 365 | nto_dummy_supply_regset (struct regcache *regcache, char *regs) |
d737fd7f KW |
366 | { |
367 | /* Do nothing. */ | |
368 | } | |
369 | ||
370 | enum gdb_osabi | |
371 | nto_elf_osabi_sniffer (bfd *abfd) | |
372 | { | |
373 | if (nto_is_nto_target) | |
3d171c85 | 374 | return nto_is_nto_target (abfd); |
d737fd7f KW |
375 | return GDB_OSABI_UNKNOWN; |
376 | } | |
377 | ||
1b883d35 | 378 | void |
d737fd7f | 379 | nto_initialize_signals (void) |
1b883d35 | 380 | { |
1b883d35 KW |
381 | /* We use SIG45 for pulses, or something, so nostop, noprint |
382 | and pass them. */ | |
383 | signal_stop_update (target_signal_from_name ("SIG45"), 0); | |
384 | signal_print_update (target_signal_from_name ("SIG45"), 0); | |
385 | signal_pass_update (target_signal_from_name ("SIG45"), 1); | |
386 | ||
387 | /* By default we don't want to stop on these two, but we do want to pass. */ | |
388 | #if defined(SIGSELECT) | |
389 | signal_stop_update (SIGSELECT, 0); | |
390 | signal_print_update (SIGSELECT, 0); | |
391 | signal_pass_update (SIGSELECT, 1); | |
392 | #endif | |
393 | ||
394 | #if defined(SIGPHOTON) | |
395 | signal_stop_update (SIGPHOTON, 0); | |
396 | signal_print_update (SIGPHOTON, 0); | |
397 | signal_pass_update (SIGPHOTON, 1); | |
398 | #endif | |
d737fd7f | 399 | } |
1b883d35 | 400 | |
63807e1d PA |
401 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
402 | extern initialize_file_ftype _initialize_nto_tdep; | |
403 | ||
d737fd7f KW |
404 | void |
405 | _initialize_nto_tdep (void) | |
406 | { | |
407 | add_setshow_zinteger_cmd ("nto-debug", class_maintenance, | |
7915a72c AC |
408 | &nto_internal_debugging, _("\ |
409 | Set QNX NTO internal debugging."), _("\ | |
410 | Show QNX NTO internal debugging."), _("\ | |
d737fd7f KW |
411 | When non-zero, nto specific debug info is\n\ |
412 | displayed. Different information is displayed\n\ | |
7915a72c | 413 | for different positive values."), |
2c5b56ce | 414 | NULL, |
7915a72c | 415 | NULL, /* FIXME: i18n: QNX NTO internal debugging is %s. */ |
2c5b56ce | 416 | &setdebuglist, &showdebuglist); |
1b883d35 | 417 | } |