1 /* nto-tdep.c - general QNX Neutrino target functionality.
3 Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
5 Contributed by QNX Software Systems Ltd.
7 This file is part of GDB.
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 3 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "gdb_string.h"
27 #include "cli/cli-decode.h"
28 #include "cli/cli-cmds.h"
33 #include "solib-svr4.h"
40 #include <sys/cygwin.h>
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";
48 static char default_nto_target[] = "";
51 struct nto_target_ops current_nto_target;
56 char *p = getenv ("QNX_TARGET");
59 static char buf[PATH_MAX];
61 cygwin_conv_to_posix_path (p, buf);
63 cygwin_conv_to_posix_path (default_nto_target, buf);
66 return p ? p : default_nto_target;
71 nto_set_target (struct nto_target_ops *targ)
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;
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. */
86 nto_map_arch_to_cputype (const char *arch)
88 if (!strcmp (arch, "i386") || !strcmp (arch, "x86"))
90 if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc"))
92 if (!strcmp (arch, "mips"))
94 if (!strcmp (arch, "arm"))
96 if (!strcmp (arch, "sh"))
98 return CPUTYPE_UNKNOWN;
102 nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname)
104 char *buf, *arch_path, *nto_root, *endian, *base;
107 #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll"
109 nto_root = nto_target ();
110 if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, "i386") == 0)
115 else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
117 || strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
125 arch = gdbarch_bfd_arch_info (current_gdbarch)->arch_name;
126 endian = gdbarch_byte_order (current_gdbarch)
127 == BFD_ENDIAN_BIG ? "be" : "le";
130 /* In case nto_root is short, add strlen(solib)
131 so we can reuse arch_path below. */
133 alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 +
135 sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
137 buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1);
138 sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path,
141 /* Don't assume basename() isn't destructive. */
142 base = strrchr (solib, '/');
146 base++; /* Skip over '/'. */
148 ret = openp (buf, 1, base, o_flags, 0, temp_pathname);
149 if (ret < 0 && base != solib)
151 sprintf (arch_path, "/%s", solib);
152 ret = open (arch_path, o_flags, 0);
156 *temp_pathname = gdb_realpath (arch_path);
158 **temp_pathname = '\0';
165 nto_init_solib_absolute_prefix (void)
167 char buf[PATH_MAX * 2], arch_path[PATH_MAX];
168 char *nto_root, *endian;
171 nto_root = nto_target ();
172 if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name, "i386") == 0)
177 else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
179 || strcmp (gdbarch_bfd_arch_info (current_gdbarch)->arch_name,
187 arch = gdbarch_bfd_arch_info (current_gdbarch)->arch_name;
188 endian = gdbarch_byte_order (current_gdbarch)
189 == BFD_ENDIAN_BIG ? "be" : "le";
192 sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
194 sprintf (buf, "set solib-absolute-prefix %s", arch_path);
195 execute_command (buf, 0);
199 nto_parse_redirection (char *pargv[], const char **pin, const char **pout,
203 char *in, *out, *err, *p;
206 for (n = 0; pargv[n]; n++);
213 argv = xcalloc (n + 1, sizeof argv[0]);
215 for (i = 0, n = 0; n < argc; n++)
234 else if (*p++ == '2' && *p++ == '>')
236 if (*p == '&' && *(p + 1) == '1')
244 argv[i++] = pargv[n];
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. */
258 /* Pointer to copy of link map from inferior. The type is char *
259 rather than void *, so that we may use byte offsets to find the
260 various fields without the need for a cast. */
265 LM_ADDR (struct so_list *so)
267 struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();
269 return extract_typed_address (so->lm_info->lm + lmo->l_addr_offset,
270 builtin_type_void_data_ptr);
274 nto_truncate_ptr (CORE_ADDR addr)
276 if (gdbarch_ptr_bit (current_gdbarch) == sizeof (CORE_ADDR) * 8)
277 /* We don't need to truncate anything, and the bit twiddling below
278 will fail due to overflow problems. */
281 return addr & (((CORE_ADDR) 1 << gdbarch_ptr_bit (current_gdbarch)) - 1);
285 find_load_phdr (bfd *abfd)
287 Elf_Internal_Phdr *phdr;
290 if (!elf_tdata (abfd))
293 phdr = elf_tdata (abfd)->phdr;
294 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
296 if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
303 nto_relocate_section_addresses (struct so_list *so, struct section_table *sec)
305 /* Neutrino treats the l_addr base address field in link.h as different than
306 the base address in the System V ABI and so the offset needs to be
307 calculated and applied to relocations. */
308 Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd);
309 unsigned vaddr = phdr ? phdr->p_vaddr : 0;
311 sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
312 sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
315 /* This is cheating a bit because our linker code is in libc.so. If we
316 ever implement lazy linking, this may need to be re-examined. */
318 nto_in_dynsym_resolve_code (CORE_ADDR pc)
320 if (in_plt_section (pc, NULL))
326 nto_generic_supply_gpregset (const struct regset *regset,
327 struct regcache *regcache, int regnum,
328 const void *gregs, size_t len)
333 nto_generic_supply_fpregset (const struct regset *regset,
334 struct regcache *regcache, int regnum,
335 const void *fpregs, size_t len)
340 nto_generic_supply_altregset (const struct regset *regset,
341 struct regcache *regcache, int regnum,
342 const void *altregs, size_t len)
347 nto_dummy_supply_regset (struct regcache *regcache, char *regs)
353 nto_elf_osabi_sniffer (bfd *abfd)
355 if (nto_is_nto_target)
356 return nto_is_nto_target (abfd);
357 return GDB_OSABI_UNKNOWN;
361 nto_initialize_signals (void)
363 /* We use SIG45 for pulses, or something, so nostop, noprint
365 signal_stop_update (target_signal_from_name ("SIG45"), 0);
366 signal_print_update (target_signal_from_name ("SIG45"), 0);
367 signal_pass_update (target_signal_from_name ("SIG45"), 1);
369 /* By default we don't want to stop on these two, but we do want to pass. */
370 #if defined(SIGSELECT)
371 signal_stop_update (SIGSELECT, 0);
372 signal_print_update (SIGSELECT, 0);
373 signal_pass_update (SIGSELECT, 1);
376 #if defined(SIGPHOTON)
377 signal_stop_update (SIGPHOTON, 0);
378 signal_print_update (SIGPHOTON, 0);
379 signal_pass_update (SIGPHOTON, 1);
384 _initialize_nto_tdep (void)
386 add_setshow_zinteger_cmd ("nto-debug", class_maintenance,
387 &nto_internal_debugging, _("\
388 Set QNX NTO internal debugging."), _("\
389 Show QNX NTO internal debugging."), _("\
390 When non-zero, nto specific debug info is\n\
391 displayed. Different information is displayed\n\
392 for different positive values."),
394 NULL, /* FIXME: i18n: QNX NTO internal debugging is %s. */
395 &setdebuglist, &showdebuglist);