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1b883d35 KW |
1 | /* nto-tdep.c - general QNX Neutrino target functionality. |
2 | ||
197e01b6 | 3 | Copyright (C) 2003, 2004 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 | |
11 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
20 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
1b883d35 | 23 | |
47979a4b | 24 | #include "gdb_stat.h" |
1b883d35 KW |
25 | #include "gdb_string.h" |
26 | #include "nto-tdep.h" | |
27 | #include "top.h" | |
28 | #include "cli/cli-decode.h" | |
29 | #include "cli/cli-cmds.h" | |
30 | #include "inferior.h" | |
31 | #include "gdbarch.h" | |
32 | #include "bfd.h" | |
33 | #include "elf-bfd.h" | |
34 | #include "solib-svr4.h" | |
35 | #include "gdbcore.h" | |
238ae9af UW |
36 | #include "objfiles.h" |
37 | ||
38 | #include <string.h> | |
1b883d35 KW |
39 | |
40 | #ifdef __CYGWIN__ | |
41 | #include <sys/cygwin.h> | |
42 | #endif | |
43 | ||
44 | #ifdef __CYGWIN__ | |
45 | static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6"; | |
46 | #elif defined(__sun__) || defined(linux) | |
47 | static char default_nto_target[] = "/opt/QNXsdk/target/qnx6"; | |
48 | #else | |
49 | static char default_nto_target[] = ""; | |
50 | #endif | |
51 | ||
52 | struct nto_target_ops current_nto_target; | |
53 | ||
54 | static char * | |
55 | nto_target (void) | |
56 | { | |
57 | char *p = getenv ("QNX_TARGET"); | |
58 | ||
59 | #ifdef __CYGWIN__ | |
60 | static char buf[PATH_MAX]; | |
61 | if (p) | |
62 | cygwin_conv_to_posix_path (p, buf); | |
63 | else | |
64 | cygwin_conv_to_posix_path (default_nto_target, buf); | |
65 | return buf; | |
66 | #else | |
67 | return p ? p : default_nto_target; | |
68 | #endif | |
69 | } | |
70 | ||
d737fd7f | 71 | void |
3d171c85 | 72 | nto_set_target (struct nto_target_ops *targ) |
d737fd7f KW |
73 | { |
74 | nto_regset_id = targ->regset_id; | |
75 | nto_supply_gregset = targ->supply_gregset; | |
76 | nto_supply_fpregset = targ->supply_fpregset; | |
77 | nto_supply_altregset = targ->supply_altregset; | |
78 | nto_supply_regset = targ->supply_regset; | |
79 | nto_register_area = targ->register_area; | |
80 | nto_regset_fill = targ->regset_fill; | |
81 | nto_fetch_link_map_offsets = targ->fetch_link_map_offsets; | |
82 | } | |
83 | ||
1b883d35 KW |
84 | /* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86, |
85 | CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */ | |
86 | int | |
87 | nto_map_arch_to_cputype (const char *arch) | |
88 | { | |
89 | if (!strcmp (arch, "i386") || !strcmp (arch, "x86")) | |
90 | return CPUTYPE_X86; | |
192cdb19 | 91 | if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc")) |
1b883d35 KW |
92 | return CPUTYPE_PPC; |
93 | if (!strcmp (arch, "mips")) | |
94 | return CPUTYPE_MIPS; | |
95 | if (!strcmp (arch, "arm")) | |
96 | return CPUTYPE_ARM; | |
97 | if (!strcmp (arch, "sh")) | |
98 | return CPUTYPE_SH; | |
99 | return CPUTYPE_UNKNOWN; | |
100 | } | |
101 | ||
102 | int | |
103 | nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname) | |
104 | { | |
d737fd7f | 105 | char *buf, *arch_path, *nto_root, *endian, *base; |
1b883d35 | 106 | const char *arch; |
d737fd7f KW |
107 | int ret; |
108 | #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll" | |
1b883d35 KW |
109 | |
110 | nto_root = nto_target (); | |
111 | if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0) | |
112 | { | |
113 | arch = "x86"; | |
114 | endian = ""; | |
115 | } | |
192cdb19 KW |
116 | else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0 |
117 | || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0) | |
1b883d35 KW |
118 | { |
119 | arch = "ppc"; | |
120 | endian = "be"; | |
121 | } | |
122 | else | |
123 | { | |
124 | arch = TARGET_ARCHITECTURE->arch_name; | |
125 | endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le"; | |
126 | } | |
127 | ||
d737fd7f KW |
128 | /* In case nto_root is short, add strlen(solib) |
129 | so we can reuse arch_path below. */ | |
130 | arch_path = | |
131 | alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 + | |
132 | strlen (solib)); | |
1b883d35 KW |
133 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); |
134 | ||
d737fd7f KW |
135 | buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1); |
136 | sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path, | |
1b883d35 KW |
137 | arch_path); |
138 | ||
d737fd7f KW |
139 | /* Don't assume basename() isn't destructive. */ |
140 | base = strrchr (solib, '/'); | |
141 | if (!base) | |
142 | base = solib; | |
143 | else | |
144 | base++; /* Skip over '/'. */ | |
145 | ||
146 | ret = openp (buf, 1, base, o_flags, 0, temp_pathname); | |
147 | if (ret < 0 && base != solib) | |
148 | { | |
149 | sprintf (arch_path, "/%s", solib); | |
150 | ret = open (arch_path, o_flags, 0); | |
151 | if (temp_pathname) | |
152 | { | |
153 | if (ret >= 0) | |
154 | *temp_pathname = gdb_realpath (arch_path); | |
155 | else | |
156 | **temp_pathname = '\0'; | |
157 | } | |
158 | } | |
159 | return ret; | |
1b883d35 KW |
160 | } |
161 | ||
162 | void | |
163 | nto_init_solib_absolute_prefix (void) | |
164 | { | |
165 | char buf[PATH_MAX * 2], arch_path[PATH_MAX]; | |
166 | char *nto_root, *endian; | |
167 | const char *arch; | |
168 | ||
169 | nto_root = nto_target (); | |
170 | if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0) | |
171 | { | |
172 | arch = "x86"; | |
173 | endian = ""; | |
174 | } | |
192cdb19 KW |
175 | else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0 |
176 | || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0) | |
1b883d35 KW |
177 | { |
178 | arch = "ppc"; | |
179 | endian = "be"; | |
180 | } | |
181 | else | |
182 | { | |
183 | arch = TARGET_ARCHITECTURE->arch_name; | |
184 | endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le"; | |
185 | } | |
186 | ||
187 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); | |
188 | ||
189 | sprintf (buf, "set solib-absolute-prefix %s", arch_path); | |
190 | execute_command (buf, 0); | |
191 | } | |
192 | ||
193 | char ** | |
194 | nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr) | |
195 | { | |
196 | char **argv; | |
197 | char *in, *out, *err, *p; | |
198 | int argc, i, n; | |
199 | ||
200 | for (n = 0; pargv[n]; n++); | |
201 | if (n == 0) | |
202 | return NULL; | |
203 | in = ""; | |
204 | out = ""; | |
205 | err = ""; | |
206 | ||
207 | argv = xcalloc (n + 1, sizeof argv[0]); | |
208 | argc = n; | |
209 | for (i = 0, n = 0; n < argc; n++) | |
210 | { | |
211 | p = pargv[n]; | |
212 | if (*p == '>') | |
213 | { | |
214 | p++; | |
215 | if (*p) | |
216 | out = p; | |
217 | else | |
218 | out = pargv[++n]; | |
219 | } | |
220 | else if (*p == '<') | |
221 | { | |
222 | p++; | |
223 | if (*p) | |
224 | in = p; | |
225 | else | |
226 | in = pargv[++n]; | |
227 | } | |
228 | else if (*p++ == '2' && *p++ == '>') | |
229 | { | |
230 | if (*p == '&' && *(p + 1) == '1') | |
231 | err = out; | |
232 | else if (*p) | |
233 | err = p; | |
234 | else | |
235 | err = pargv[++n]; | |
236 | } | |
237 | else | |
238 | argv[i++] = pargv[n]; | |
239 | } | |
240 | *pin = in; | |
241 | *pout = out; | |
242 | *perr = err; | |
243 | return argv; | |
244 | } | |
245 | ||
246 | /* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from | |
247 | solib-svr4.c to support nto_relocate_section_addresses | |
248 | which is different from the svr4 version. */ | |
249 | ||
250 | struct lm_info | |
251 | { | |
252 | /* Pointer to copy of link map from inferior. The type is char * | |
253 | rather than void *, so that we may use byte offsets to find the | |
254 | various fields without the need for a cast. */ | |
255 | char *lm; | |
256 | }; | |
257 | ||
258 | static CORE_ADDR | |
259 | LM_ADDR (struct so_list *so) | |
260 | { | |
261 | struct link_map_offsets *lmo = nto_fetch_link_map_offsets (); | |
262 | ||
263 | return (CORE_ADDR) extract_signed_integer (so->lm_info->lm + | |
264 | lmo->l_addr_offset, | |
265 | lmo->l_addr_size); | |
266 | } | |
267 | ||
268 | static CORE_ADDR | |
269 | nto_truncate_ptr (CORE_ADDR addr) | |
270 | { | |
271 | if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8) | |
272 | /* We don't need to truncate anything, and the bit twiddling below | |
273 | will fail due to overflow problems. */ | |
274 | return addr; | |
275 | else | |
276 | return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1); | |
277 | } | |
278 | ||
279 | Elf_Internal_Phdr * | |
280 | find_load_phdr (bfd *abfd) | |
281 | { | |
282 | Elf_Internal_Phdr *phdr; | |
283 | unsigned int i; | |
284 | ||
285 | if (!elf_tdata (abfd)) | |
286 | return NULL; | |
287 | ||
288 | phdr = elf_tdata (abfd)->phdr; | |
289 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
290 | { | |
291 | if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X)) | |
292 | return phdr; | |
293 | } | |
294 | return NULL; | |
295 | } | |
296 | ||
297 | void | |
298 | nto_relocate_section_addresses (struct so_list *so, struct section_table *sec) | |
299 | { | |
300 | /* Neutrino treats the l_addr base address field in link.h as different than | |
301 | the base address in the System V ABI and so the offset needs to be | |
302 | calculated and applied to relocations. */ | |
303 | Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd); | |
304 | unsigned vaddr = phdr ? phdr->p_vaddr : 0; | |
305 | ||
306 | sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr); | |
307 | sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr); | |
308 | } | |
309 | ||
d737fd7f KW |
310 | /* This is cheating a bit because our linker code is in libc.so. If we |
311 | ever implement lazy linking, this may need to be re-examined. */ | |
312 | int | |
313 | nto_in_dynsym_resolve_code (CORE_ADDR pc) | |
314 | { | |
315 | if (in_plt_section (pc, NULL)) | |
316 | return 1; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | void | |
321 | nto_generic_supply_gpregset (const struct regset *regset, | |
322 | struct regcache *regcache, int regnum, | |
323 | const void *gregs, size_t len) | |
324 | { | |
325 | } | |
326 | ||
327 | void | |
328 | nto_generic_supply_fpregset (const struct regset *regset, | |
329 | struct regcache *regcache, int regnum, | |
330 | const void *fpregs, size_t len) | |
331 | { | |
332 | } | |
333 | ||
334 | void | |
335 | nto_generic_supply_altregset (const struct regset *regset, | |
336 | struct regcache *regcache, int regnum, | |
337 | const void *altregs, size_t len) | |
338 | { | |
339 | } | |
340 | ||
341 | void | |
342 | nto_dummy_supply_regset (char *regs) | |
343 | { | |
344 | /* Do nothing. */ | |
345 | } | |
346 | ||
347 | enum gdb_osabi | |
348 | nto_elf_osabi_sniffer (bfd *abfd) | |
349 | { | |
350 | if (nto_is_nto_target) | |
3d171c85 | 351 | return nto_is_nto_target (abfd); |
d737fd7f KW |
352 | return GDB_OSABI_UNKNOWN; |
353 | } | |
354 | ||
1b883d35 | 355 | void |
d737fd7f | 356 | nto_initialize_signals (void) |
1b883d35 | 357 | { |
1b883d35 KW |
358 | /* We use SIG45 for pulses, or something, so nostop, noprint |
359 | and pass them. */ | |
360 | signal_stop_update (target_signal_from_name ("SIG45"), 0); | |
361 | signal_print_update (target_signal_from_name ("SIG45"), 0); | |
362 | signal_pass_update (target_signal_from_name ("SIG45"), 1); | |
363 | ||
364 | /* By default we don't want to stop on these two, but we do want to pass. */ | |
365 | #if defined(SIGSELECT) | |
366 | signal_stop_update (SIGSELECT, 0); | |
367 | signal_print_update (SIGSELECT, 0); | |
368 | signal_pass_update (SIGSELECT, 1); | |
369 | #endif | |
370 | ||
371 | #if defined(SIGPHOTON) | |
372 | signal_stop_update (SIGPHOTON, 0); | |
373 | signal_print_update (SIGPHOTON, 0); | |
374 | signal_pass_update (SIGPHOTON, 1); | |
375 | #endif | |
d737fd7f | 376 | } |
1b883d35 | 377 | |
d737fd7f KW |
378 | void |
379 | _initialize_nto_tdep (void) | |
380 | { | |
381 | add_setshow_zinteger_cmd ("nto-debug", class_maintenance, | |
7915a72c AC |
382 | &nto_internal_debugging, _("\ |
383 | Set QNX NTO internal debugging."), _("\ | |
384 | Show QNX NTO internal debugging."), _("\ | |
d737fd7f KW |
385 | When non-zero, nto specific debug info is\n\ |
386 | displayed. Different information is displayed\n\ | |
7915a72c | 387 | for different positive values."), |
2c5b56ce | 388 | NULL, |
7915a72c | 389 | NULL, /* FIXME: i18n: QNX NTO internal debugging is %s. */ |
2c5b56ce | 390 | &setdebuglist, &showdebuglist); |
1b883d35 | 391 | } |