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1b883d35 KW |
1 | /* nto-tdep.c - general QNX Neutrino target functionality. |
2 | ||
b3f42336 | 3 | Copyright 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 | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
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" | |
36 | ||
37 | #ifdef __CYGWIN__ | |
38 | #include <sys/cygwin.h> | |
39 | #endif | |
40 | ||
41 | #ifdef __CYGWIN__ | |
42 | static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6"; | |
43 | #elif defined(__sun__) || defined(linux) | |
44 | static char default_nto_target[] = "/opt/QNXsdk/target/qnx6"; | |
45 | #else | |
46 | static char default_nto_target[] = ""; | |
47 | #endif | |
48 | ||
49 | struct nto_target_ops current_nto_target; | |
50 | ||
51 | static char * | |
52 | nto_target (void) | |
53 | { | |
54 | char *p = getenv ("QNX_TARGET"); | |
55 | ||
56 | #ifdef __CYGWIN__ | |
57 | static char buf[PATH_MAX]; | |
58 | if (p) | |
59 | cygwin_conv_to_posix_path (p, buf); | |
60 | else | |
61 | cygwin_conv_to_posix_path (default_nto_target, buf); | |
62 | return buf; | |
63 | #else | |
64 | return p ? p : default_nto_target; | |
65 | #endif | |
66 | } | |
67 | ||
d737fd7f KW |
68 | void |
69 | nto_set_target(struct nto_target_ops *targ) | |
70 | { | |
71 | nto_regset_id = targ->regset_id; | |
72 | nto_supply_gregset = targ->supply_gregset; | |
73 | nto_supply_fpregset = targ->supply_fpregset; | |
74 | nto_supply_altregset = targ->supply_altregset; | |
75 | nto_supply_regset = targ->supply_regset; | |
76 | nto_register_area = targ->register_area; | |
77 | nto_regset_fill = targ->regset_fill; | |
78 | nto_fetch_link_map_offsets = targ->fetch_link_map_offsets; | |
79 | } | |
80 | ||
1b883d35 KW |
81 | /* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86, |
82 | CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */ | |
83 | int | |
84 | nto_map_arch_to_cputype (const char *arch) | |
85 | { | |
86 | if (!strcmp (arch, "i386") || !strcmp (arch, "x86")) | |
87 | return CPUTYPE_X86; | |
192cdb19 | 88 | if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc")) |
1b883d35 KW |
89 | return CPUTYPE_PPC; |
90 | if (!strcmp (arch, "mips")) | |
91 | return CPUTYPE_MIPS; | |
92 | if (!strcmp (arch, "arm")) | |
93 | return CPUTYPE_ARM; | |
94 | if (!strcmp (arch, "sh")) | |
95 | return CPUTYPE_SH; | |
96 | return CPUTYPE_UNKNOWN; | |
97 | } | |
98 | ||
99 | int | |
100 | nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname) | |
101 | { | |
d737fd7f | 102 | char *buf, *arch_path, *nto_root, *endian, *base; |
1b883d35 | 103 | const char *arch; |
d737fd7f KW |
104 | int ret; |
105 | #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll" | |
1b883d35 KW |
106 | |
107 | nto_root = nto_target (); | |
108 | if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0) | |
109 | { | |
110 | arch = "x86"; | |
111 | endian = ""; | |
112 | } | |
192cdb19 KW |
113 | else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0 |
114 | || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0) | |
1b883d35 KW |
115 | { |
116 | arch = "ppc"; | |
117 | endian = "be"; | |
118 | } | |
119 | else | |
120 | { | |
121 | arch = TARGET_ARCHITECTURE->arch_name; | |
122 | endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le"; | |
123 | } | |
124 | ||
d737fd7f KW |
125 | /* In case nto_root is short, add strlen(solib) |
126 | so we can reuse arch_path below. */ | |
127 | arch_path = | |
128 | alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 + | |
129 | strlen (solib)); | |
1b883d35 KW |
130 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); |
131 | ||
d737fd7f KW |
132 | buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1); |
133 | sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path, | |
1b883d35 KW |
134 | arch_path); |
135 | ||
d737fd7f KW |
136 | /* Don't assume basename() isn't destructive. */ |
137 | base = strrchr (solib, '/'); | |
138 | if (!base) | |
139 | base = solib; | |
140 | else | |
141 | base++; /* Skip over '/'. */ | |
142 | ||
143 | ret = openp (buf, 1, base, o_flags, 0, temp_pathname); | |
144 | if (ret < 0 && base != solib) | |
145 | { | |
146 | sprintf (arch_path, "/%s", solib); | |
147 | ret = open (arch_path, o_flags, 0); | |
148 | if (temp_pathname) | |
149 | { | |
150 | if (ret >= 0) | |
151 | *temp_pathname = gdb_realpath (arch_path); | |
152 | else | |
153 | **temp_pathname = '\0'; | |
154 | } | |
155 | } | |
156 | return ret; | |
1b883d35 KW |
157 | } |
158 | ||
159 | void | |
160 | nto_init_solib_absolute_prefix (void) | |
161 | { | |
162 | char buf[PATH_MAX * 2], arch_path[PATH_MAX]; | |
163 | char *nto_root, *endian; | |
164 | const char *arch; | |
165 | ||
166 | nto_root = nto_target (); | |
167 | if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0) | |
168 | { | |
169 | arch = "x86"; | |
170 | endian = ""; | |
171 | } | |
192cdb19 KW |
172 | else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0 |
173 | || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0) | |
1b883d35 KW |
174 | { |
175 | arch = "ppc"; | |
176 | endian = "be"; | |
177 | } | |
178 | else | |
179 | { | |
180 | arch = TARGET_ARCHITECTURE->arch_name; | |
181 | endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le"; | |
182 | } | |
183 | ||
184 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); | |
185 | ||
186 | sprintf (buf, "set solib-absolute-prefix %s", arch_path); | |
187 | execute_command (buf, 0); | |
188 | } | |
189 | ||
190 | char ** | |
191 | nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr) | |
192 | { | |
193 | char **argv; | |
194 | char *in, *out, *err, *p; | |
195 | int argc, i, n; | |
196 | ||
197 | for (n = 0; pargv[n]; n++); | |
198 | if (n == 0) | |
199 | return NULL; | |
200 | in = ""; | |
201 | out = ""; | |
202 | err = ""; | |
203 | ||
204 | argv = xcalloc (n + 1, sizeof argv[0]); | |
205 | argc = n; | |
206 | for (i = 0, n = 0; n < argc; n++) | |
207 | { | |
208 | p = pargv[n]; | |
209 | if (*p == '>') | |
210 | { | |
211 | p++; | |
212 | if (*p) | |
213 | out = p; | |
214 | else | |
215 | out = pargv[++n]; | |
216 | } | |
217 | else if (*p == '<') | |
218 | { | |
219 | p++; | |
220 | if (*p) | |
221 | in = p; | |
222 | else | |
223 | in = pargv[++n]; | |
224 | } | |
225 | else if (*p++ == '2' && *p++ == '>') | |
226 | { | |
227 | if (*p == '&' && *(p + 1) == '1') | |
228 | err = out; | |
229 | else if (*p) | |
230 | err = p; | |
231 | else | |
232 | err = pargv[++n]; | |
233 | } | |
234 | else | |
235 | argv[i++] = pargv[n]; | |
236 | } | |
237 | *pin = in; | |
238 | *pout = out; | |
239 | *perr = err; | |
240 | return argv; | |
241 | } | |
242 | ||
243 | /* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from | |
244 | solib-svr4.c to support nto_relocate_section_addresses | |
245 | which is different from the svr4 version. */ | |
246 | ||
247 | struct lm_info | |
248 | { | |
249 | /* Pointer to copy of link map from inferior. The type is char * | |
250 | rather than void *, so that we may use byte offsets to find the | |
251 | various fields without the need for a cast. */ | |
252 | char *lm; | |
253 | }; | |
254 | ||
255 | static CORE_ADDR | |
256 | LM_ADDR (struct so_list *so) | |
257 | { | |
258 | struct link_map_offsets *lmo = nto_fetch_link_map_offsets (); | |
259 | ||
260 | return (CORE_ADDR) extract_signed_integer (so->lm_info->lm + | |
261 | lmo->l_addr_offset, | |
262 | lmo->l_addr_size); | |
263 | } | |
264 | ||
265 | static CORE_ADDR | |
266 | nto_truncate_ptr (CORE_ADDR addr) | |
267 | { | |
268 | if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8) | |
269 | /* We don't need to truncate anything, and the bit twiddling below | |
270 | will fail due to overflow problems. */ | |
271 | return addr; | |
272 | else | |
273 | return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1); | |
274 | } | |
275 | ||
276 | Elf_Internal_Phdr * | |
277 | find_load_phdr (bfd *abfd) | |
278 | { | |
279 | Elf_Internal_Phdr *phdr; | |
280 | unsigned int i; | |
281 | ||
282 | if (!elf_tdata (abfd)) | |
283 | return NULL; | |
284 | ||
285 | phdr = elf_tdata (abfd)->phdr; | |
286 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
287 | { | |
288 | if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X)) | |
289 | return phdr; | |
290 | } | |
291 | return NULL; | |
292 | } | |
293 | ||
294 | void | |
295 | nto_relocate_section_addresses (struct so_list *so, struct section_table *sec) | |
296 | { | |
297 | /* Neutrino treats the l_addr base address field in link.h as different than | |
298 | the base address in the System V ABI and so the offset needs to be | |
299 | calculated and applied to relocations. */ | |
300 | Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd); | |
301 | unsigned vaddr = phdr ? phdr->p_vaddr : 0; | |
302 | ||
303 | sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr); | |
304 | sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr); | |
305 | } | |
306 | ||
d737fd7f KW |
307 | /* This is cheating a bit because our linker code is in libc.so. If we |
308 | ever implement lazy linking, this may need to be re-examined. */ | |
309 | int | |
310 | nto_in_dynsym_resolve_code (CORE_ADDR pc) | |
311 | { | |
312 | if (in_plt_section (pc, NULL)) | |
313 | return 1; | |
314 | return 0; | |
315 | } | |
316 | ||
317 | void | |
318 | nto_generic_supply_gpregset (const struct regset *regset, | |
319 | struct regcache *regcache, int regnum, | |
320 | const void *gregs, size_t len) | |
321 | { | |
322 | } | |
323 | ||
324 | void | |
325 | nto_generic_supply_fpregset (const struct regset *regset, | |
326 | struct regcache *regcache, int regnum, | |
327 | const void *fpregs, size_t len) | |
328 | { | |
329 | } | |
330 | ||
331 | void | |
332 | nto_generic_supply_altregset (const struct regset *regset, | |
333 | struct regcache *regcache, int regnum, | |
334 | const void *altregs, size_t len) | |
335 | { | |
336 | } | |
337 | ||
338 | void | |
339 | nto_dummy_supply_regset (char *regs) | |
340 | { | |
341 | /* Do nothing. */ | |
342 | } | |
343 | ||
344 | enum gdb_osabi | |
345 | nto_elf_osabi_sniffer (bfd *abfd) | |
346 | { | |
347 | if (nto_is_nto_target) | |
348 | return nto_is_nto_target (abfd); | |
349 | return GDB_OSABI_UNKNOWN; | |
350 | } | |
351 | ||
1b883d35 KW |
352 | static void |
353 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, | |
354 | int which, CORE_ADDR reg_addr) | |
355 | { | |
356 | nto_regset_t regset; | |
192cdb19 | 357 | |
0fbc10f7 KW |
358 | /* See corelow.c:get_core_registers for values of WHICH. */ |
359 | if (which == 0) | |
1b883d35 KW |
360 | { |
361 | memcpy ((char *) ®set, core_reg_sect, | |
362 | min (core_reg_size, sizeof (regset))); | |
363 | nto_supply_gregset ((char *) ®set); | |
364 | } | |
0fbc10f7 | 365 | else if (which == 2) |
1b883d35 KW |
366 | { |
367 | memcpy ((char *) ®set, core_reg_sect, | |
368 | min (core_reg_size, sizeof (regset))); | |
369 | nto_supply_fpregset ((char *) ®set); | |
370 | } | |
1b883d35 KW |
371 | } |
372 | ||
1b883d35 KW |
373 | /* Register that we are able to handle ELF file formats using standard |
374 | procfs "regset" structures. */ | |
375 | static struct core_fns regset_core_fns = { | |
376 | bfd_target_elf_flavour, /* core_flavour */ | |
377 | default_check_format, /* check_format */ | |
378 | default_core_sniffer, /* core_sniffer */ | |
379 | fetch_core_registers, /* core_read_registers */ | |
380 | NULL /* next */ | |
381 | }; | |
382 | ||
383 | void | |
d737fd7f | 384 | nto_initialize_signals (void) |
1b883d35 | 385 | { |
1b883d35 KW |
386 | /* We use SIG45 for pulses, or something, so nostop, noprint |
387 | and pass them. */ | |
388 | signal_stop_update (target_signal_from_name ("SIG45"), 0); | |
389 | signal_print_update (target_signal_from_name ("SIG45"), 0); | |
390 | signal_pass_update (target_signal_from_name ("SIG45"), 1); | |
391 | ||
392 | /* By default we don't want to stop on these two, but we do want to pass. */ | |
393 | #if defined(SIGSELECT) | |
394 | signal_stop_update (SIGSELECT, 0); | |
395 | signal_print_update (SIGSELECT, 0); | |
396 | signal_pass_update (SIGSELECT, 1); | |
397 | #endif | |
398 | ||
399 | #if defined(SIGPHOTON) | |
400 | signal_stop_update (SIGPHOTON, 0); | |
401 | signal_print_update (SIGPHOTON, 0); | |
402 | signal_pass_update (SIGPHOTON, 1); | |
403 | #endif | |
d737fd7f | 404 | } |
1b883d35 | 405 | |
d737fd7f KW |
406 | void |
407 | _initialize_nto_tdep (void) | |
408 | { | |
409 | add_setshow_zinteger_cmd ("nto-debug", class_maintenance, | |
410 | &nto_internal_debugging, "\ | |
411 | Set QNX NTO internal debugging.", "\ | |
412 | Show QNX NTO internal debugging.", "\ | |
413 | When non-zero, nto specific debug info is\n\ | |
414 | displayed. Different information is displayed\n\ | |
415 | for different positive values.", "\ | |
416 | QNX NTO internal debugging is %s.", NULL, NULL, &setdebuglist, &showdebuglist); | |
1b883d35 | 417 | /* Register core file support. */ |
00e32a35 | 418 | deprecated_add_core_fns (®set_core_fns); |
1b883d35 | 419 | } |