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1b883d35 KW |
1 | /* nto-tdep.c - general QNX Neutrino target functionality. |
2 | ||
9b254dd1 | 3 | Copyright (C) 2003, 2004, 2007, 2008 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 | |
47979a4b | 22 | #include "gdb_stat.h" |
1b883d35 KW |
23 | #include "gdb_string.h" |
24 | #include "nto-tdep.h" | |
25 | #include "top.h" | |
26 | #include "cli/cli-decode.h" | |
27 | #include "cli/cli-cmds.h" | |
28 | #include "inferior.h" | |
29 | #include "gdbarch.h" | |
30 | #include "bfd.h" | |
31 | #include "elf-bfd.h" | |
32 | #include "solib-svr4.h" | |
33 | #include "gdbcore.h" | |
238ae9af UW |
34 | #include "objfiles.h" |
35 | ||
36 | #include <string.h> | |
1b883d35 KW |
37 | |
38 | #ifdef __CYGWIN__ | |
39 | #include <sys/cygwin.h> | |
40 | #endif | |
41 | ||
42 | #ifdef __CYGWIN__ | |
43 | static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6"; | |
44 | #elif defined(__sun__) || defined(linux) | |
45 | static char default_nto_target[] = "/opt/QNXsdk/target/qnx6"; | |
46 | #else | |
47 | static char default_nto_target[] = ""; | |
48 | #endif | |
49 | ||
50 | struct nto_target_ops current_nto_target; | |
51 | ||
52 | static char * | |
53 | nto_target (void) | |
54 | { | |
55 | char *p = getenv ("QNX_TARGET"); | |
56 | ||
57 | #ifdef __CYGWIN__ | |
58 | static char buf[PATH_MAX]; | |
59 | if (p) | |
60 | cygwin_conv_to_posix_path (p, buf); | |
61 | else | |
62 | cygwin_conv_to_posix_path (default_nto_target, buf); | |
63 | return buf; | |
64 | #else | |
65 | return p ? p : default_nto_target; | |
66 | #endif | |
67 | } | |
68 | ||
d737fd7f | 69 | void |
3d171c85 | 70 | nto_set_target (struct nto_target_ops *targ) |
d737fd7f KW |
71 | { |
72 | nto_regset_id = targ->regset_id; | |
73 | nto_supply_gregset = targ->supply_gregset; | |
74 | nto_supply_fpregset = targ->supply_fpregset; | |
75 | nto_supply_altregset = targ->supply_altregset; | |
76 | nto_supply_regset = targ->supply_regset; | |
77 | nto_register_area = targ->register_area; | |
78 | nto_regset_fill = targ->regset_fill; | |
79 | nto_fetch_link_map_offsets = targ->fetch_link_map_offsets; | |
80 | } | |
81 | ||
1b883d35 KW |
82 | /* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86, |
83 | CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */ | |
84 | int | |
85 | nto_map_arch_to_cputype (const char *arch) | |
86 | { | |
87 | if (!strcmp (arch, "i386") || !strcmp (arch, "x86")) | |
88 | return CPUTYPE_X86; | |
192cdb19 | 89 | if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc")) |
1b883d35 KW |
90 | return CPUTYPE_PPC; |
91 | if (!strcmp (arch, "mips")) | |
92 | return CPUTYPE_MIPS; | |
93 | if (!strcmp (arch, "arm")) | |
94 | return CPUTYPE_ARM; | |
95 | if (!strcmp (arch, "sh")) | |
96 | return CPUTYPE_SH; | |
97 | return CPUTYPE_UNKNOWN; | |
98 | } | |
99 | ||
100 | int | |
101 | nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname) | |
102 | { | |
d737fd7f | 103 | char *buf, *arch_path, *nto_root, *endian, *base; |
1b883d35 | 104 | const char *arch; |
d737fd7f KW |
105 | int ret; |
106 | #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll" | |
1b883d35 KW |
107 | |
108 | nto_root = nto_target (); | |
1143fffb | 109 | if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, "i386") == 0) |
1b883d35 KW |
110 | { |
111 | arch = "x86"; | |
112 | endian = ""; | |
113 | } | |
1143fffb UW |
114 | else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, |
115 | "rs6000") == 0 | |
116 | || strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, | |
117 | "powerpc") == 0) | |
1b883d35 KW |
118 | { |
119 | arch = "ppc"; | |
120 | endian = "be"; | |
121 | } | |
122 | else | |
123 | { | |
1143fffb | 124 | arch = gdbarch_bfd_arch_info (current_gdbarch)->arch_name; |
4c6b5505 UW |
125 | endian = gdbarch_byte_order (current_gdbarch) |
126 | == BFD_ENDIAN_BIG ? "be" : "le"; | |
1b883d35 KW |
127 | } |
128 | ||
d737fd7f KW |
129 | /* In case nto_root is short, add strlen(solib) |
130 | so we can reuse arch_path below. */ | |
131 | arch_path = | |
132 | alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 + | |
133 | strlen (solib)); | |
1b883d35 KW |
134 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); |
135 | ||
d737fd7f KW |
136 | buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1); |
137 | sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path, | |
1b883d35 KW |
138 | arch_path); |
139 | ||
d737fd7f KW |
140 | /* Don't assume basename() isn't destructive. */ |
141 | base = strrchr (solib, '/'); | |
142 | if (!base) | |
143 | base = solib; | |
144 | else | |
145 | base++; /* Skip over '/'. */ | |
146 | ||
147 | ret = openp (buf, 1, base, o_flags, 0, temp_pathname); | |
148 | if (ret < 0 && base != solib) | |
149 | { | |
150 | sprintf (arch_path, "/%s", solib); | |
151 | ret = open (arch_path, o_flags, 0); | |
152 | if (temp_pathname) | |
153 | { | |
154 | if (ret >= 0) | |
155 | *temp_pathname = gdb_realpath (arch_path); | |
156 | else | |
157 | **temp_pathname = '\0'; | |
158 | } | |
159 | } | |
160 | return ret; | |
1b883d35 KW |
161 | } |
162 | ||
163 | void | |
164 | nto_init_solib_absolute_prefix (void) | |
165 | { | |
166 | char buf[PATH_MAX * 2], arch_path[PATH_MAX]; | |
167 | char *nto_root, *endian; | |
168 | const char *arch; | |
169 | ||
170 | nto_root = nto_target (); | |
1143fffb | 171 | if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, "i386") == 0) |
1b883d35 KW |
172 | { |
173 | arch = "x86"; | |
174 | endian = ""; | |
175 | } | |
1143fffb UW |
176 | else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, |
177 | "rs6000") == 0 | |
178 | || strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, | |
179 | "powerpc") == 0) | |
1b883d35 KW |
180 | { |
181 | arch = "ppc"; | |
182 | endian = "be"; | |
183 | } | |
184 | else | |
185 | { | |
1143fffb | 186 | arch = gdbarch_bfd_arch_info (current_gdbarch)->arch_name; |
4c6b5505 UW |
187 | endian = gdbarch_byte_order (current_gdbarch) |
188 | == BFD_ENDIAN_BIG ? "be" : "le"; | |
1b883d35 KW |
189 | } |
190 | ||
191 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); | |
192 | ||
193 | sprintf (buf, "set solib-absolute-prefix %s", arch_path); | |
194 | execute_command (buf, 0); | |
195 | } | |
196 | ||
197 | char ** | |
198 | nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr) | |
199 | { | |
200 | char **argv; | |
201 | char *in, *out, *err, *p; | |
202 | int argc, i, n; | |
203 | ||
204 | for (n = 0; pargv[n]; n++); | |
205 | if (n == 0) | |
206 | return NULL; | |
207 | in = ""; | |
208 | out = ""; | |
209 | err = ""; | |
210 | ||
211 | argv = xcalloc (n + 1, sizeof argv[0]); | |
212 | argc = n; | |
213 | for (i = 0, n = 0; n < argc; n++) | |
214 | { | |
215 | p = pargv[n]; | |
216 | if (*p == '>') | |
217 | { | |
218 | p++; | |
219 | if (*p) | |
220 | out = p; | |
221 | else | |
222 | out = pargv[++n]; | |
223 | } | |
224 | else if (*p == '<') | |
225 | { | |
226 | p++; | |
227 | if (*p) | |
228 | in = p; | |
229 | else | |
230 | in = pargv[++n]; | |
231 | } | |
232 | else if (*p++ == '2' && *p++ == '>') | |
233 | { | |
234 | if (*p == '&' && *(p + 1) == '1') | |
235 | err = out; | |
236 | else if (*p) | |
237 | err = p; | |
238 | else | |
239 | err = pargv[++n]; | |
240 | } | |
241 | else | |
242 | argv[i++] = pargv[n]; | |
243 | } | |
244 | *pin = in; | |
245 | *pout = out; | |
246 | *perr = err; | |
247 | return argv; | |
248 | } | |
249 | ||
250 | /* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from | |
251 | solib-svr4.c to support nto_relocate_section_addresses | |
252 | which is different from the svr4 version. */ | |
253 | ||
254 | struct lm_info | |
255 | { | |
256 | /* Pointer to copy of link map from inferior. The type is char * | |
257 | rather than void *, so that we may use byte offsets to find the | |
258 | various fields without the need for a cast. */ | |
259 | char *lm; | |
260 | }; | |
261 | ||
262 | static CORE_ADDR | |
263 | LM_ADDR (struct so_list *so) | |
264 | { | |
265 | struct link_map_offsets *lmo = nto_fetch_link_map_offsets (); | |
266 | ||
ec20a626 UW |
267 | return extract_typed_address (so->lm_info->lm + lmo->l_addr_offset, |
268 | builtin_type_void_data_ptr); | |
1b883d35 KW |
269 | } |
270 | ||
271 | static CORE_ADDR | |
272 | nto_truncate_ptr (CORE_ADDR addr) | |
273 | { | |
819844ad | 274 | if (gdbarch_ptr_bit (current_gdbarch) == sizeof (CORE_ADDR) * 8) |
1b883d35 KW |
275 | /* We don't need to truncate anything, and the bit twiddling below |
276 | will fail due to overflow problems. */ | |
277 | return addr; | |
278 | else | |
819844ad | 279 | return addr & (((CORE_ADDR) 1 << gdbarch_ptr_bit (current_gdbarch)) - 1); |
1b883d35 KW |
280 | } |
281 | ||
282 | Elf_Internal_Phdr * | |
283 | find_load_phdr (bfd *abfd) | |
284 | { | |
285 | Elf_Internal_Phdr *phdr; | |
286 | unsigned int i; | |
287 | ||
288 | if (!elf_tdata (abfd)) | |
289 | return NULL; | |
290 | ||
291 | phdr = elf_tdata (abfd)->phdr; | |
292 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
293 | { | |
294 | if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X)) | |
295 | return phdr; | |
296 | } | |
297 | return NULL; | |
298 | } | |
299 | ||
300 | void | |
301 | nto_relocate_section_addresses (struct so_list *so, struct section_table *sec) | |
302 | { | |
303 | /* Neutrino treats the l_addr base address field in link.h as different than | |
304 | the base address in the System V ABI and so the offset needs to be | |
305 | calculated and applied to relocations. */ | |
306 | Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd); | |
307 | unsigned vaddr = phdr ? phdr->p_vaddr : 0; | |
308 | ||
309 | sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr); | |
310 | sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr); | |
311 | } | |
312 | ||
d737fd7f KW |
313 | /* This is cheating a bit because our linker code is in libc.so. If we |
314 | ever implement lazy linking, this may need to be re-examined. */ | |
315 | int | |
316 | nto_in_dynsym_resolve_code (CORE_ADDR pc) | |
317 | { | |
318 | if (in_plt_section (pc, NULL)) | |
319 | return 1; | |
320 | return 0; | |
321 | } | |
322 | ||
323 | void | |
324 | nto_generic_supply_gpregset (const struct regset *regset, | |
325 | struct regcache *regcache, int regnum, | |
326 | const void *gregs, size_t len) | |
327 | { | |
328 | } | |
329 | ||
330 | void | |
331 | nto_generic_supply_fpregset (const struct regset *regset, | |
332 | struct regcache *regcache, int regnum, | |
333 | const void *fpregs, size_t len) | |
334 | { | |
335 | } | |
336 | ||
337 | void | |
338 | nto_generic_supply_altregset (const struct regset *regset, | |
339 | struct regcache *regcache, int regnum, | |
340 | const void *altregs, size_t len) | |
341 | { | |
342 | } | |
343 | ||
344 | void | |
468e3d51 | 345 | nto_dummy_supply_regset (struct regcache *regcache, char *regs) |
d737fd7f KW |
346 | { |
347 | /* Do nothing. */ | |
348 | } | |
349 | ||
350 | enum gdb_osabi | |
351 | nto_elf_osabi_sniffer (bfd *abfd) | |
352 | { | |
353 | if (nto_is_nto_target) | |
3d171c85 | 354 | return nto_is_nto_target (abfd); |
d737fd7f KW |
355 | return GDB_OSABI_UNKNOWN; |
356 | } | |
357 | ||
1b883d35 | 358 | void |
d737fd7f | 359 | nto_initialize_signals (void) |
1b883d35 | 360 | { |
1b883d35 KW |
361 | /* We use SIG45 for pulses, or something, so nostop, noprint |
362 | and pass them. */ | |
363 | signal_stop_update (target_signal_from_name ("SIG45"), 0); | |
364 | signal_print_update (target_signal_from_name ("SIG45"), 0); | |
365 | signal_pass_update (target_signal_from_name ("SIG45"), 1); | |
366 | ||
367 | /* By default we don't want to stop on these two, but we do want to pass. */ | |
368 | #if defined(SIGSELECT) | |
369 | signal_stop_update (SIGSELECT, 0); | |
370 | signal_print_update (SIGSELECT, 0); | |
371 | signal_pass_update (SIGSELECT, 1); | |
372 | #endif | |
373 | ||
374 | #if defined(SIGPHOTON) | |
375 | signal_stop_update (SIGPHOTON, 0); | |
376 | signal_print_update (SIGPHOTON, 0); | |
377 | signal_pass_update (SIGPHOTON, 1); | |
378 | #endif | |
d737fd7f | 379 | } |
1b883d35 | 380 | |
d737fd7f KW |
381 | void |
382 | _initialize_nto_tdep (void) | |
383 | { | |
384 | add_setshow_zinteger_cmd ("nto-debug", class_maintenance, | |
7915a72c AC |
385 | &nto_internal_debugging, _("\ |
386 | Set QNX NTO internal debugging."), _("\ | |
387 | Show QNX NTO internal debugging."), _("\ | |
d737fd7f KW |
388 | When non-zero, nto specific debug info is\n\ |
389 | displayed. Different information is displayed\n\ | |
7915a72c | 390 | for different positive values."), |
2c5b56ce | 391 | NULL, |
7915a72c | 392 | NULL, /* FIXME: i18n: QNX NTO internal debugging is %s. */ |
2c5b56ce | 393 | &setdebuglist, &showdebuglist); |
1b883d35 | 394 | } |