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 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/>. */
23 #include "gdb_string.h"
26 #include "cli/cli-decode.h"
27 #include "cli/cli-cmds.h"
32 #include "solib-svr4.h"
39 #include <sys/cygwin.h>
43 static char default_nto_target
[] = "C:\\QNXsdk\\target\\qnx6";
44 #elif defined(__sun__) || defined(linux)
45 static char default_nto_target
[] = "/opt/QNXsdk/target/qnx6";
47 static char default_nto_target
[] = "";
50 struct nto_target_ops current_nto_target
;
55 char *p
= getenv ("QNX_TARGET");
58 static char buf
[PATH_MAX
];
60 cygwin_conv_to_posix_path (p
, buf
);
62 cygwin_conv_to_posix_path (default_nto_target
, buf
);
65 return p
? p
: default_nto_target
;
70 nto_set_target (struct nto_target_ops
*targ
)
72 nto_regset_id
= targ
->regset_id
;
73 nto_supply_gregset
= targ
->supply_gregset
;
74 nto_supply_fpregset
= targ
->supply_fpregset
;
75 nto_supply_altregset
= targ
->supply_altregset
;
76 nto_supply_regset
= targ
->supply_regset
;
77 nto_register_area
= targ
->register_area
;
78 nto_regset_fill
= targ
->regset_fill
;
79 nto_fetch_link_map_offsets
= targ
->fetch_link_map_offsets
;
82 /* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86,
83 CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */
85 nto_map_arch_to_cputype (const char *arch
)
87 if (!strcmp (arch
, "i386") || !strcmp (arch
, "x86"))
89 if (!strcmp (arch
, "rs6000") || !strcmp (arch
, "powerpc"))
91 if (!strcmp (arch
, "mips"))
93 if (!strcmp (arch
, "arm"))
95 if (!strcmp (arch
, "sh"))
97 return CPUTYPE_UNKNOWN
;
101 nto_find_and_open_solib (char *solib
, unsigned o_flags
, char **temp_pathname
)
103 char *buf
, *arch_path
, *nto_root
, *endian
, *base
;
106 #define PATH_FMT "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll"
108 nto_root
= nto_target ();
109 if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
, "i386") == 0)
114 else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
116 || strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
124 arch
= gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
;
125 endian
= gdbarch_byte_order (current_gdbarch
)
126 == BFD_ENDIAN_BIG
? "be" : "le";
129 /* In case nto_root is short, add strlen(solib)
130 so we can reuse arch_path below. */
132 alloca (strlen (nto_root
) + strlen (arch
) + strlen (endian
) + 2 +
134 sprintf (arch_path
, "%s/%s%s", nto_root
, arch
, endian
);
136 buf
= alloca (strlen (PATH_FMT
) + strlen (arch_path
) * 5 + 1);
137 sprintf (buf
, PATH_FMT
, arch_path
, arch_path
, arch_path
, arch_path
,
140 /* Don't assume basename() isn't destructive. */
141 base
= strrchr (solib
, '/');
145 base
++; /* Skip over '/'. */
147 ret
= openp (buf
, 1, base
, o_flags
, 0, temp_pathname
);
148 if (ret
< 0 && base
!= solib
)
150 sprintf (arch_path
, "/%s", solib
);
151 ret
= open (arch_path
, o_flags
, 0);
155 *temp_pathname
= gdb_realpath (arch_path
);
157 **temp_pathname
= '\0';
164 nto_init_solib_absolute_prefix (void)
166 char buf
[PATH_MAX
* 2], arch_path
[PATH_MAX
];
167 char *nto_root
, *endian
;
170 nto_root
= nto_target ();
171 if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
, "i386") == 0)
176 else if (strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
178 || strcmp (gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
,
186 arch
= gdbarch_bfd_arch_info (current_gdbarch
)->arch_name
;
187 endian
= gdbarch_byte_order (current_gdbarch
)
188 == BFD_ENDIAN_BIG
? "be" : "le";
191 sprintf (arch_path
, "%s/%s%s", nto_root
, arch
, endian
);
193 sprintf (buf
, "set solib-absolute-prefix %s", arch_path
);
194 execute_command (buf
, 0);
198 nto_parse_redirection (char *pargv
[], char **pin
, char **pout
, char **perr
)
201 char *in
, *out
, *err
, *p
;
204 for (n
= 0; pargv
[n
]; n
++);
211 argv
= xcalloc (n
+ 1, sizeof argv
[0]);
213 for (i
= 0, n
= 0; n
< argc
; n
++)
232 else if (*p
++ == '2' && *p
++ == '>')
234 if (*p
== '&' && *(p
+ 1) == '1')
242 argv
[i
++] = pargv
[n
];
250 /* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from
251 solib-svr4.c to support nto_relocate_section_addresses
252 which is different from the svr4 version. */
256 /* Pointer to copy of link map from inferior. The type is char *
257 rather than void *, so that we may use byte offsets to find the
258 various fields without the need for a cast. */
263 LM_ADDR (struct so_list
*so
)
265 struct link_map_offsets
*lmo
= nto_fetch_link_map_offsets ();
267 return (CORE_ADDR
) extract_signed_integer (so
->lm_info
->lm
+
273 nto_truncate_ptr (CORE_ADDR addr
)
275 if (gdbarch_ptr_bit (current_gdbarch
) == sizeof (CORE_ADDR
) * 8)
276 /* We don't need to truncate anything, and the bit twiddling below
277 will fail due to overflow problems. */
280 return addr
& (((CORE_ADDR
) 1 << gdbarch_ptr_bit (current_gdbarch
)) - 1);
284 find_load_phdr (bfd
*abfd
)
286 Elf_Internal_Phdr
*phdr
;
289 if (!elf_tdata (abfd
))
292 phdr
= elf_tdata (abfd
)->phdr
;
293 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
295 if (phdr
->p_type
== PT_LOAD
&& (phdr
->p_flags
& PF_X
))
302 nto_relocate_section_addresses (struct so_list
*so
, struct section_table
*sec
)
304 /* Neutrino treats the l_addr base address field in link.h as different than
305 the base address in the System V ABI and so the offset needs to be
306 calculated and applied to relocations. */
307 Elf_Internal_Phdr
*phdr
= find_load_phdr (sec
->bfd
);
308 unsigned vaddr
= phdr
? phdr
->p_vaddr
: 0;
310 sec
->addr
= nto_truncate_ptr (sec
->addr
+ LM_ADDR (so
) - vaddr
);
311 sec
->endaddr
= nto_truncate_ptr (sec
->endaddr
+ LM_ADDR (so
) - vaddr
);
314 /* This is cheating a bit because our linker code is in libc.so. If we
315 ever implement lazy linking, this may need to be re-examined. */
317 nto_in_dynsym_resolve_code (CORE_ADDR pc
)
319 if (in_plt_section (pc
, NULL
))
325 nto_generic_supply_gpregset (const struct regset
*regset
,
326 struct regcache
*regcache
, int regnum
,
327 const void *gregs
, size_t len
)
332 nto_generic_supply_fpregset (const struct regset
*regset
,
333 struct regcache
*regcache
, int regnum
,
334 const void *fpregs
, size_t len
)
339 nto_generic_supply_altregset (const struct regset
*regset
,
340 struct regcache
*regcache
, int regnum
,
341 const void *altregs
, size_t len
)
346 nto_dummy_supply_regset (struct regcache
*regcache
, char *regs
)
352 nto_elf_osabi_sniffer (bfd
*abfd
)
354 if (nto_is_nto_target
)
355 return nto_is_nto_target (abfd
);
356 return GDB_OSABI_UNKNOWN
;
360 nto_initialize_signals (void)
362 /* We use SIG45 for pulses, or something, so nostop, noprint
364 signal_stop_update (target_signal_from_name ("SIG45"), 0);
365 signal_print_update (target_signal_from_name ("SIG45"), 0);
366 signal_pass_update (target_signal_from_name ("SIG45"), 1);
368 /* By default we don't want to stop on these two, but we do want to pass. */
369 #if defined(SIGSELECT)
370 signal_stop_update (SIGSELECT
, 0);
371 signal_print_update (SIGSELECT
, 0);
372 signal_pass_update (SIGSELECT
, 1);
375 #if defined(SIGPHOTON)
376 signal_stop_update (SIGPHOTON
, 0);
377 signal_print_update (SIGPHOTON
, 0);
378 signal_pass_update (SIGPHOTON
, 1);
383 _initialize_nto_tdep (void)
385 add_setshow_zinteger_cmd ("nto-debug", class_maintenance
,
386 &nto_internal_debugging
, _("\
387 Set QNX NTO internal debugging."), _("\
388 Show QNX NTO internal debugging."), _("\
389 When non-zero, nto specific debug info is\n\
390 displayed. Different information is displayed\n\
391 for different positive values."),
393 NULL
, /* FIXME: i18n: QNX NTO internal debugging is %s. */
394 &setdebuglist
, &showdebuglist
);