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1b883d35 KW |
1 | /* nto-tdep.c - general QNX Neutrino target functionality. |
2 | ||
7b6bb8da | 3 | Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010, 2011 |
4c38e0a4 | 4 | Free Software Foundation, Inc. |
1b883d35 KW |
5 | |
6 | Contributed by QNX Software Systems Ltd. | |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
1b883d35 KW |
13 | (at your option) any later version. |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1b883d35 | 22 | |
b4d5ed91 | 23 | #include "defs.h" |
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 | ||
71 | /* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86, | |
72 | CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */ | |
73 | int | |
74 | nto_map_arch_to_cputype (const char *arch) | |
75 | { | |
76 | if (!strcmp (arch, "i386") || !strcmp (arch, "x86")) | |
77 | return CPUTYPE_X86; | |
192cdb19 | 78 | if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc")) |
1b883d35 KW |
79 | return CPUTYPE_PPC; |
80 | if (!strcmp (arch, "mips")) | |
81 | return CPUTYPE_MIPS; | |
82 | if (!strcmp (arch, "arm")) | |
83 | return CPUTYPE_ARM; | |
84 | if (!strcmp (arch, "sh")) | |
85 | return CPUTYPE_SH; | |
86 | return CPUTYPE_UNKNOWN; | |
87 | } | |
88 | ||
89 | int | |
90 | nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname) | |
91 | { | |
d737fd7f | 92 | char *buf, *arch_path, *nto_root, *endian, *base; |
1b883d35 | 93 | const char *arch; |
d737fd7f | 94 | int ret; |
0df8b418 MS |
95 | #define PATH_FMT \ |
96 | "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll" | |
1b883d35 KW |
97 | |
98 | nto_root = nto_target (); | |
1cf3db46 | 99 | if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, "i386") == 0) |
1b883d35 KW |
100 | { |
101 | arch = "x86"; | |
102 | endian = ""; | |
103 | } | |
1cf3db46 | 104 | else if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 105 | "rs6000") == 0 |
1cf3db46 | 106 | || strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 107 | "powerpc") == 0) |
1b883d35 KW |
108 | { |
109 | arch = "ppc"; | |
110 | endian = "be"; | |
111 | } | |
112 | else | |
113 | { | |
1cf3db46 UW |
114 | arch = gdbarch_bfd_arch_info (target_gdbarch)->arch_name; |
115 | endian = gdbarch_byte_order (target_gdbarch) | |
4c6b5505 | 116 | == BFD_ENDIAN_BIG ? "be" : "le"; |
1b883d35 KW |
117 | } |
118 | ||
d737fd7f KW |
119 | /* In case nto_root is short, add strlen(solib) |
120 | so we can reuse arch_path below. */ | |
121 | arch_path = | |
122 | alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 + | |
123 | strlen (solib)); | |
1b883d35 KW |
124 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); |
125 | ||
d737fd7f KW |
126 | buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1); |
127 | sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path, | |
1b883d35 KW |
128 | arch_path); |
129 | ||
d737fd7f KW |
130 | /* Don't assume basename() isn't destructive. */ |
131 | base = strrchr (solib, '/'); | |
132 | if (!base) | |
133 | base = solib; | |
134 | else | |
135 | base++; /* Skip over '/'. */ | |
136 | ||
fbdebf46 | 137 | ret = openp (buf, 1, base, o_flags, temp_pathname); |
d737fd7f KW |
138 | if (ret < 0 && base != solib) |
139 | { | |
140 | sprintf (arch_path, "/%s", solib); | |
141 | ret = open (arch_path, o_flags, 0); | |
142 | if (temp_pathname) | |
143 | { | |
144 | if (ret >= 0) | |
145 | *temp_pathname = gdb_realpath (arch_path); | |
146 | else | |
147 | **temp_pathname = '\0'; | |
148 | } | |
149 | } | |
150 | return ret; | |
1b883d35 KW |
151 | } |
152 | ||
153 | void | |
154 | nto_init_solib_absolute_prefix (void) | |
155 | { | |
156 | char buf[PATH_MAX * 2], arch_path[PATH_MAX]; | |
157 | char *nto_root, *endian; | |
158 | const char *arch; | |
159 | ||
160 | nto_root = nto_target (); | |
1cf3db46 | 161 | if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, "i386") == 0) |
1b883d35 KW |
162 | { |
163 | arch = "x86"; | |
164 | endian = ""; | |
165 | } | |
1cf3db46 | 166 | else if (strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 167 | "rs6000") == 0 |
1cf3db46 | 168 | || strcmp (gdbarch_bfd_arch_info (target_gdbarch)->arch_name, |
1143fffb | 169 | "powerpc") == 0) |
1b883d35 KW |
170 | { |
171 | arch = "ppc"; | |
172 | endian = "be"; | |
173 | } | |
174 | else | |
175 | { | |
1cf3db46 UW |
176 | arch = gdbarch_bfd_arch_info (target_gdbarch)->arch_name; |
177 | endian = gdbarch_byte_order (target_gdbarch) | |
4c6b5505 | 178 | == BFD_ENDIAN_BIG ? "be" : "le"; |
1b883d35 KW |
179 | } |
180 | ||
181 | sprintf (arch_path, "%s/%s%s", nto_root, arch, endian); | |
182 | ||
183 | sprintf (buf, "set solib-absolute-prefix %s", arch_path); | |
184 | execute_command (buf, 0); | |
185 | } | |
186 | ||
187 | char ** | |
14ef7606 AR |
188 | nto_parse_redirection (char *pargv[], const char **pin, const char **pout, |
189 | const char **perr) | |
1b883d35 KW |
190 | { |
191 | char **argv; | |
192 | char *in, *out, *err, *p; | |
193 | int argc, i, n; | |
194 | ||
195 | for (n = 0; pargv[n]; n++); | |
196 | if (n == 0) | |
197 | return NULL; | |
198 | in = ""; | |
199 | out = ""; | |
200 | err = ""; | |
201 | ||
202 | argv = xcalloc (n + 1, sizeof argv[0]); | |
203 | argc = n; | |
204 | for (i = 0, n = 0; n < argc; n++) | |
205 | { | |
206 | p = pargv[n]; | |
207 | if (*p == '>') | |
208 | { | |
209 | p++; | |
210 | if (*p) | |
211 | out = p; | |
212 | else | |
213 | out = pargv[++n]; | |
214 | } | |
215 | else if (*p == '<') | |
216 | { | |
217 | p++; | |
218 | if (*p) | |
219 | in = p; | |
220 | else | |
221 | in = pargv[++n]; | |
222 | } | |
223 | else if (*p++ == '2' && *p++ == '>') | |
224 | { | |
225 | if (*p == '&' && *(p + 1) == '1') | |
226 | err = out; | |
227 | else if (*p) | |
228 | err = p; | |
229 | else | |
230 | err = pargv[++n]; | |
231 | } | |
232 | else | |
233 | argv[i++] = pargv[n]; | |
234 | } | |
235 | *pin = in; | |
236 | *pout = out; | |
237 | *perr = err; | |
238 | return argv; | |
239 | } | |
240 | ||
241 | /* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from | |
242 | solib-svr4.c to support nto_relocate_section_addresses | |
243 | which is different from the svr4 version. */ | |
244 | ||
ebd67d87 AR |
245 | /* Link map info to include in an allocated so_list entry */ |
246 | ||
1b883d35 | 247 | struct lm_info |
ebd67d87 AR |
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 | gdb_byte *lm; | |
253 | ||
254 | /* Amount by which addresses in the binary should be relocated to | |
255 | match the inferior. This could most often be taken directly | |
256 | from lm, but when prelinking is involved and the prelink base | |
257 | address changes, we may need a different offset, we want to | |
258 | warn about the difference and compute it only once. */ | |
259 | CORE_ADDR l_addr; | |
260 | ||
261 | /* The target location of lm. */ | |
262 | CORE_ADDR lm_addr; | |
263 | }; | |
264 | ||
1b883d35 KW |
265 | |
266 | static CORE_ADDR | |
267 | LM_ADDR (struct so_list *so) | |
268 | { | |
ebd67d87 AR |
269 | if (so->lm_info->l_addr == (CORE_ADDR)-1) |
270 | { | |
271 | struct link_map_offsets *lmo = nto_fetch_link_map_offsets (); | |
b6da22b0 | 272 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
1b883d35 | 273 | |
ebd67d87 | 274 | so->lm_info->l_addr = |
b6da22b0 | 275 | extract_typed_address (so->lm_info->lm + lmo->l_addr_offset, ptr_type); |
ebd67d87 AR |
276 | } |
277 | return so->lm_info->l_addr; | |
1b883d35 KW |
278 | } |
279 | ||
280 | static CORE_ADDR | |
281 | nto_truncate_ptr (CORE_ADDR addr) | |
282 | { | |
1cf3db46 | 283 | if (gdbarch_ptr_bit (target_gdbarch) == sizeof (CORE_ADDR) * 8) |
1b883d35 KW |
284 | /* We don't need to truncate anything, and the bit twiddling below |
285 | will fail due to overflow problems. */ | |
286 | return addr; | |
287 | else | |
1cf3db46 | 288 | return addr & (((CORE_ADDR) 1 << gdbarch_ptr_bit (target_gdbarch)) - 1); |
1b883d35 KW |
289 | } |
290 | ||
63807e1d | 291 | static Elf_Internal_Phdr * |
1b883d35 KW |
292 | find_load_phdr (bfd *abfd) |
293 | { | |
294 | Elf_Internal_Phdr *phdr; | |
295 | unsigned int i; | |
296 | ||
297 | if (!elf_tdata (abfd)) | |
298 | return NULL; | |
299 | ||
300 | phdr = elf_tdata (abfd)->phdr; | |
301 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
302 | { | |
303 | if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X)) | |
304 | return phdr; | |
305 | } | |
306 | return NULL; | |
307 | } | |
308 | ||
309 | void | |
0542c86d | 310 | nto_relocate_section_addresses (struct so_list *so, struct target_section *sec) |
1b883d35 KW |
311 | { |
312 | /* Neutrino treats the l_addr base address field in link.h as different than | |
313 | the base address in the System V ABI and so the offset needs to be | |
314 | calculated and applied to relocations. */ | |
315 | Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd); | |
316 | unsigned vaddr = phdr ? phdr->p_vaddr : 0; | |
317 | ||
318 | sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr); | |
319 | sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr); | |
320 | } | |
321 | ||
d737fd7f KW |
322 | /* This is cheating a bit because our linker code is in libc.so. If we |
323 | ever implement lazy linking, this may need to be re-examined. */ | |
324 | int | |
325 | nto_in_dynsym_resolve_code (CORE_ADDR pc) | |
326 | { | |
327 | if (in_plt_section (pc, NULL)) | |
328 | return 1; | |
329 | return 0; | |
330 | } | |
331 | ||
d737fd7f | 332 | void |
468e3d51 | 333 | nto_dummy_supply_regset (struct regcache *regcache, char *regs) |
d737fd7f KW |
334 | { |
335 | /* Do nothing. */ | |
336 | } | |
337 | ||
338 | enum gdb_osabi | |
339 | nto_elf_osabi_sniffer (bfd *abfd) | |
340 | { | |
341 | if (nto_is_nto_target) | |
3d171c85 | 342 | return nto_is_nto_target (abfd); |
d737fd7f KW |
343 | return GDB_OSABI_UNKNOWN; |
344 | } | |
345 | ||
745a434e AR |
346 | static const char *nto_thread_state_str[] = |
347 | { | |
348 | "DEAD", /* 0 0x00 */ | |
349 | "RUNNING", /* 1 0x01 */ | |
350 | "READY", /* 2 0x02 */ | |
351 | "STOPPED", /* 3 0x03 */ | |
352 | "SEND", /* 4 0x04 */ | |
353 | "RECEIVE", /* 5 0x05 */ | |
354 | "REPLY", /* 6 0x06 */ | |
355 | "STACK", /* 7 0x07 */ | |
356 | "WAITTHREAD", /* 8 0x08 */ | |
357 | "WAITPAGE", /* 9 0x09 */ | |
358 | "SIGSUSPEND", /* 10 0x0a */ | |
359 | "SIGWAITINFO", /* 11 0x0b */ | |
360 | "NANOSLEEP", /* 12 0x0c */ | |
361 | "MUTEX", /* 13 0x0d */ | |
362 | "CONDVAR", /* 14 0x0e */ | |
363 | "JOIN", /* 15 0x0f */ | |
364 | "INTR", /* 16 0x10 */ | |
365 | "SEM", /* 17 0x11 */ | |
366 | "WAITCTX", /* 18 0x12 */ | |
367 | "NET_SEND", /* 19 0x13 */ | |
368 | "NET_REPLY" /* 20 0x14 */ | |
369 | }; | |
370 | ||
371 | char * | |
372 | nto_extra_thread_info (struct thread_info *ti) | |
373 | { | |
374 | if (ti && ti->private | |
375 | && ti->private->state < ARRAY_SIZE (nto_thread_state_str)) | |
376 | return (char *)nto_thread_state_str [ti->private->state]; | |
377 | return ""; | |
378 | } | |
379 | ||
1b883d35 | 380 | void |
d737fd7f | 381 | nto_initialize_signals (void) |
1b883d35 | 382 | { |
1b883d35 KW |
383 | /* We use SIG45 for pulses, or something, so nostop, noprint |
384 | and pass them. */ | |
385 | signal_stop_update (target_signal_from_name ("SIG45"), 0); | |
386 | signal_print_update (target_signal_from_name ("SIG45"), 0); | |
387 | signal_pass_update (target_signal_from_name ("SIG45"), 1); | |
388 | ||
389 | /* By default we don't want to stop on these two, but we do want to pass. */ | |
390 | #if defined(SIGSELECT) | |
391 | signal_stop_update (SIGSELECT, 0); | |
392 | signal_print_update (SIGSELECT, 0); | |
393 | signal_pass_update (SIGSELECT, 1); | |
394 | #endif | |
395 | ||
396 | #if defined(SIGPHOTON) | |
397 | signal_stop_update (SIGPHOTON, 0); | |
398 | signal_print_update (SIGPHOTON, 0); | |
399 | signal_pass_update (SIGPHOTON, 1); | |
400 | #endif | |
d737fd7f | 401 | } |
1b883d35 | 402 | |
63807e1d PA |
403 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
404 | extern initialize_file_ftype _initialize_nto_tdep; | |
405 | ||
d737fd7f KW |
406 | void |
407 | _initialize_nto_tdep (void) | |
408 | { | |
409 | add_setshow_zinteger_cmd ("nto-debug", class_maintenance, | |
7915a72c AC |
410 | &nto_internal_debugging, _("\ |
411 | Set QNX NTO internal debugging."), _("\ | |
412 | Show QNX NTO internal debugging."), _("\ | |
d737fd7f KW |
413 | When non-zero, nto specific debug info is\n\ |
414 | displayed. Different information is displayed\n\ | |
7915a72c | 415 | for different positive values."), |
2c5b56ce | 416 | NULL, |
0df8b418 MS |
417 | NULL, /* FIXME: i18n: QNX NTO internal |
418 | debugging is %s. */ | |
2c5b56ce | 419 | &setdebuglist, &showdebuglist); |
1b883d35 | 420 | } |