1 /* nto-tdep.c - general QNX Neutrino target functionality.
3 Copyright (C) 2003, 2004, 2007 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., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
25 #include "gdb_string.h"
28 #include "cli/cli-decode.h"
29 #include "cli/cli-cmds.h"
34 #include "solib-svr4.h"
41 #include <sys/cygwin.h>
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";
49 static char default_nto_target
[] = "";
52 struct nto_target_ops current_nto_target
;
57 char *p
= getenv ("QNX_TARGET");
60 static char buf
[PATH_MAX
];
62 cygwin_conv_to_posix_path (p
, buf
);
64 cygwin_conv_to_posix_path (default_nto_target
, buf
);
67 return p
? p
: default_nto_target
;
72 nto_set_target (struct nto_target_ops
*targ
)
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
;
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. */
87 nto_map_arch_to_cputype (const char *arch
)
89 if (!strcmp (arch
, "i386") || !strcmp (arch
, "x86"))
91 if (!strcmp (arch
, "rs6000") || !strcmp (arch
, "powerpc"))
93 if (!strcmp (arch
, "mips"))
95 if (!strcmp (arch
, "arm"))
97 if (!strcmp (arch
, "sh"))
99 return CPUTYPE_UNKNOWN
;
103 nto_find_and_open_solib (char *solib
, unsigned o_flags
, char **temp_pathname
)
105 char *buf
, *arch_path
, *nto_root
, *endian
, *base
;
108 #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll"
110 nto_root
= nto_target ();
111 if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
, "i386") == 0)
116 else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
118 || strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
126 arch
= gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
;
127 endian
= gdbarch_byte_order (current_gdbarch
)
128 == BFD_ENDIAN_BIG
? "be" : "le";
131 /* In case nto_root is short, add strlen(solib)
132 so we can reuse arch_path below. */
134 alloca (strlen (nto_root
) + strlen (arch
) + strlen (endian
) + 2 +
136 sprintf (arch_path
, "%s/%s%s", nto_root
, arch
, endian
);
138 buf
= alloca (strlen (PATH_FMT
) + strlen (arch_path
) * 5 + 1);
139 sprintf (buf
, PATH_FMT
, arch_path
, arch_path
, arch_path
, arch_path
,
142 /* Don't assume basename() isn't destructive. */
143 base
= strrchr (solib
, '/');
147 base
++; /* Skip over '/'. */
149 ret
= openp (buf
, 1, base
, o_flags
, 0, temp_pathname
);
150 if (ret
< 0 && base
!= solib
)
152 sprintf (arch_path
, "/%s", solib
);
153 ret
= open (arch_path
, o_flags
, 0);
157 *temp_pathname
= gdb_realpath (arch_path
);
159 **temp_pathname
= '\0';
166 nto_init_solib_absolute_prefix (void)
168 char buf
[PATH_MAX
* 2], arch_path
[PATH_MAX
];
169 char *nto_root
, *endian
;
172 nto_root
= nto_target ();
173 if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
, "i386") == 0)
178 else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
180 || strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
188 arch
= gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
;
189 endian
= gdbarch_byte_order (current_gdbarch
)
190 == BFD_ENDIAN_BIG
? "be" : "le";
193 sprintf (arch_path
, "%s/%s%s", nto_root
, arch
, endian
);
195 sprintf (buf
, "set solib-absolute-prefix %s", arch_path
);
196 execute_command (buf
, 0);
200 nto_parse_redirection (char *pargv
[], char **pin
, char **pout
, char **perr
)
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 (CORE_ADDR
) extract_signed_integer (so
->lm_info
->lm
+
275 nto_truncate_ptr (CORE_ADDR addr
)
277 if (gdbarch_ptr_bit (current_gdbarch
) == sizeof (CORE_ADDR
) * 8)
278 /* We don't need to truncate anything, and the bit twiddling below
279 will fail due to overflow problems. */
282 return addr
& (((CORE_ADDR
) 1 << gdbarch_ptr_bit (current_gdbarch
)) - 1);
286 find_load_phdr (bfd
*abfd
)
288 Elf_Internal_Phdr
*phdr
;
291 if (!elf_tdata (abfd
))
294 phdr
= elf_tdata (abfd
)->phdr
;
295 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
297 if (phdr
->p_type
== PT_LOAD
&& (phdr
->p_flags
& PF_X
))
304 nto_relocate_section_addresses (struct so_list
*so
, struct section_table
*sec
)
306 /* Neutrino treats the l_addr base address field in link.h as different than
307 the base address in the System V ABI and so the offset needs to be
308 calculated and applied to relocations. */
309 Elf_Internal_Phdr
*phdr
= find_load_phdr (sec
->bfd
);
310 unsigned vaddr
= phdr
? phdr
->p_vaddr
: 0;
312 sec
->addr
= nto_truncate_ptr (sec
->addr
+ LM_ADDR (so
) - vaddr
);
313 sec
->endaddr
= nto_truncate_ptr (sec
->endaddr
+ LM_ADDR (so
) - vaddr
);
316 /* This is cheating a bit because our linker code is in libc.so. If we
317 ever implement lazy linking, this may need to be re-examined. */
319 nto_in_dynsym_resolve_code (CORE_ADDR pc
)
321 if (in_plt_section (pc
, NULL
))
327 nto_generic_supply_gpregset (const struct regset
*regset
,
328 struct regcache
*regcache
, int regnum
,
329 const void *gregs
, size_t len
)
334 nto_generic_supply_fpregset (const struct regset
*regset
,
335 struct regcache
*regcache
, int regnum
,
336 const void *fpregs
, size_t len
)
341 nto_generic_supply_altregset (const struct regset
*regset
,
342 struct regcache
*regcache
, int regnum
,
343 const void *altregs
, size_t len
)
348 nto_dummy_supply_regset (struct regcache
*regcache
, char *regs
)
354 nto_elf_osabi_sniffer (bfd
*abfd
)
356 if (nto_is_nto_target
)
357 return nto_is_nto_target (abfd
);
358 return GDB_OSABI_UNKNOWN
;
362 nto_initialize_signals (void)
364 /* We use SIG45 for pulses, or something, so nostop, noprint
366 signal_stop_update (target_signal_from_name ("SIG45"), 0);
367 signal_print_update (target_signal_from_name ("SIG45"), 0);
368 signal_pass_update (target_signal_from_name ("SIG45"), 1);
370 /* By default we don't want to stop on these two, but we do want to pass. */
371 #if defined(SIGSELECT)
372 signal_stop_update (SIGSELECT
, 0);
373 signal_print_update (SIGSELECT
, 0);
374 signal_pass_update (SIGSELECT
, 1);
377 #if defined(SIGPHOTON)
378 signal_stop_update (SIGPHOTON
, 0);
379 signal_print_update (SIGPHOTON
, 0);
380 signal_pass_update (SIGPHOTON
, 1);
385 _initialize_nto_tdep (void)
387 add_setshow_zinteger_cmd ("nto-debug", class_maintenance
,
388 &nto_internal_debugging
, _("\
389 Set QNX NTO internal debugging."), _("\
390 Show QNX NTO internal debugging."), _("\
391 When non-zero, nto specific debug info is\n\
392 displayed. Different information is displayed\n\
393 for different positive values."),
395 NULL
, /* FIXME: i18n: QNX NTO internal debugging is %s. */
396 &setdebuglist
, &showdebuglist
);