1 /* nto-tdep.c - general QNX Neutrino target functionality.
3 Copyright 2003, 2004 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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
28 #include "cli/cli-decode.h"
29 #include "cli/cli-cmds.h"
34 #include "solib-svr4.h"
38 #include <sys/cygwin.h>
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";
46 static char default_nto_target[] = "";
49 struct nto_target_ops current_nto_target;
54 char *p = getenv ("QNX_TARGET");
57 static char buf[PATH_MAX];
59 cygwin_conv_to_posix_path (p, buf);
61 cygwin_conv_to_posix_path (default_nto_target, buf);
64 return p ? p : default_nto_target;
69 nto_set_target (struct nto_target_ops *targ)
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;
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. */
84 nto_map_arch_to_cputype (const char *arch)
86 if (!strcmp (arch, "i386") || !strcmp (arch, "x86"))
88 if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc"))
90 if (!strcmp (arch, "mips"))
92 if (!strcmp (arch, "arm"))
94 if (!strcmp (arch, "sh"))
96 return CPUTYPE_UNKNOWN;
100 nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname)
102 char *buf, *arch_path, *nto_root, *endian, *base;
105 #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll"
107 nto_root = nto_target ();
108 if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
113 else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0
114 || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0)
121 arch = TARGET_ARCHITECTURE->arch_name;
122 endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
125 /* In case nto_root is short, add strlen(solib)
126 so we can reuse arch_path below. */
128 alloca (strlen (nto_root) + strlen (arch) + strlen (endian) + 2 +
130 sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
132 buf = alloca (strlen (PATH_FMT) + strlen (arch_path) * 5 + 1);
133 sprintf (buf, PATH_FMT, arch_path, arch_path, arch_path, arch_path,
136 /* Don't assume basename() isn't destructive. */
137 base = strrchr (solib, '/');
141 base++; /* Skip over '/'. */
143 ret = openp (buf, 1, base, o_flags, 0, temp_pathname);
144 if (ret < 0 && base != solib)
146 sprintf (arch_path, "/%s", solib);
147 ret = open (arch_path, o_flags, 0);
151 *temp_pathname = gdb_realpath (arch_path);
153 **temp_pathname = '\0';
160 nto_init_solib_absolute_prefix (void)
162 char buf[PATH_MAX * 2], arch_path[PATH_MAX];
163 char *nto_root, *endian;
166 nto_root = nto_target ();
167 if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
172 else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0
173 || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0)
180 arch = TARGET_ARCHITECTURE->arch_name;
181 endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
184 sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
186 sprintf (buf, "set solib-absolute-prefix %s", arch_path);
187 execute_command (buf, 0);
191 nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr)
194 char *in, *out, *err, *p;
197 for (n = 0; pargv[n]; n++);
204 argv = xcalloc (n + 1, sizeof argv[0]);
206 for (i = 0, n = 0; n < argc; n++)
225 else if (*p++ == '2' && *p++ == '>')
227 if (*p == '&' && *(p + 1) == '1')
235 argv[i++] = pargv[n];
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. */
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. */
256 LM_ADDR (struct so_list *so)
258 struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();
260 return (CORE_ADDR) extract_signed_integer (so->lm_info->lm +
266 nto_truncate_ptr (CORE_ADDR addr)
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. */
273 return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1);
277 find_load_phdr (bfd *abfd)
279 Elf_Internal_Phdr *phdr;
282 if (!elf_tdata (abfd))
285 phdr = elf_tdata (abfd)->phdr;
286 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
288 if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
295 nto_relocate_section_addresses (struct so_list *so, struct section_table *sec)
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;
303 sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
304 sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
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. */
310 nto_in_dynsym_resolve_code (CORE_ADDR pc)
312 if (in_plt_section (pc, NULL))
318 nto_generic_supply_gpregset (const struct regset *regset,
319 struct regcache *regcache, int regnum,
320 const void *gregs, size_t len)
325 nto_generic_supply_fpregset (const struct regset *regset,
326 struct regcache *regcache, int regnum,
327 const void *fpregs, size_t len)
332 nto_generic_supply_altregset (const struct regset *regset,
333 struct regcache *regcache, int regnum,
334 const void *altregs, size_t len)
339 nto_dummy_supply_regset (char *regs)
345 nto_elf_osabi_sniffer (bfd *abfd)
347 if (nto_is_nto_target)
348 return nto_is_nto_target (abfd);
349 return GDB_OSABI_UNKNOWN;
353 nto_initialize_signals (void)
355 /* We use SIG45 for pulses, or something, so nostop, noprint
357 signal_stop_update (target_signal_from_name ("SIG45"), 0);
358 signal_print_update (target_signal_from_name ("SIG45"), 0);
359 signal_pass_update (target_signal_from_name ("SIG45"), 1);
361 /* By default we don't want to stop on these two, but we do want to pass. */
362 #if defined(SIGSELECT)
363 signal_stop_update (SIGSELECT, 0);
364 signal_print_update (SIGSELECT, 0);
365 signal_pass_update (SIGSELECT, 1);
368 #if defined(SIGPHOTON)
369 signal_stop_update (SIGPHOTON, 0);
370 signal_print_update (SIGPHOTON, 0);
371 signal_pass_update (SIGPHOTON, 1);
376 _initialize_nto_tdep (void)
378 add_setshow_zinteger_cmd ("nto-debug", class_maintenance,
379 &nto_internal_debugging, "\
380 Set QNX NTO internal debugging.", "\
381 Show QNX NTO internal debugging.", "\
382 When non-zero, nto specific debug info is\n\
383 displayed. Different information is displayed\n\
384 for different positive values.", "\
385 QNX NTO internal debugging is %s.", NULL, NULL, &setdebuglist, &showdebuglist);