1 /* nto-tdep.c - general QNX Neutrino target functionality.
3 Copyright (C) 2003-2018 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/>. */
31 #include "solib-svr4.h"
35 #define QNX_NOTE_NAME "QNX"
36 #define QNX_INFO_SECT_NAME "QNX_info"
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;
52 static const struct inferior_data *nto_inferior_data_reg;
57 char *p = getenv ("QNX_TARGET");
60 static char buf[PATH_MAX];
62 cygwin_conv_path (CCP_WIN_A_TO_POSIX, p, buf, PATH_MAX);
64 cygwin_conv_path (CCP_WIN_A_TO_POSIX, default_nto_target, buf, PATH_MAX);
67 return p ? p : default_nto_target;
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. */
74 nto_map_arch_to_cputype (const char *arch)
76 if (!strcmp (arch, "i386") || !strcmp (arch, "x86"))
78 if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc"))
80 if (!strcmp (arch, "mips"))
82 if (!strcmp (arch, "arm"))
84 if (!strcmp (arch, "sh"))
86 return CPUTYPE_UNKNOWN;
90 nto_find_and_open_solib (const char *solib, unsigned o_flags,
93 char *buf, *arch_path, *nto_root;
97 int arch_len, len, ret;
99 "%s/lib:%s/usr/lib:%s/usr/photon/lib:%s/usr/photon/dll:%s/lib/dll"
101 nto_root = nto_target ();
102 if (strcmp (gdbarch_bfd_arch_info (target_gdbarch ())->arch_name, "i386") == 0)
107 else if (strcmp (gdbarch_bfd_arch_info (target_gdbarch ())->arch_name,
109 || strcmp (gdbarch_bfd_arch_info (target_gdbarch ())->arch_name,
117 arch = gdbarch_bfd_arch_info (target_gdbarch ())->arch_name;
118 endian = gdbarch_byte_order (target_gdbarch ())
119 == BFD_ENDIAN_BIG ? "be" : "le";
122 /* In case nto_root is short, add strlen(solib)
123 so we can reuse arch_path below. */
125 arch_len = (strlen (nto_root) + strlen (arch) + strlen (endian) + 2
127 arch_path = (char *) alloca (arch_len);
128 xsnprintf (arch_path, arch_len, "%s/%s%s", nto_root, arch, endian);
130 len = strlen (PATH_FMT) + strlen (arch_path) * 5 + 1;
131 buf = (char *) alloca (len);
132 xsnprintf (buf, len, PATH_FMT, arch_path, arch_path, arch_path, arch_path,
135 base = lbasename (solib);
136 ret = openp (buf, OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, base, o_flags,
138 if (ret < 0 && base != solib)
140 xsnprintf (arch_path, arch_len, "/%s", solib);
141 ret = open (arch_path, o_flags, 0);
145 *temp_pathname = gdb_realpath (arch_path).release ();
147 *temp_pathname = NULL;
154 nto_init_solib_absolute_prefix (void)
156 char buf[PATH_MAX * 2], arch_path[PATH_MAX];
161 nto_root = nto_target ();
162 if (strcmp (gdbarch_bfd_arch_info (target_gdbarch ())->arch_name, "i386") == 0)
167 else if (strcmp (gdbarch_bfd_arch_info (target_gdbarch ())->arch_name,
169 || strcmp (gdbarch_bfd_arch_info (target_gdbarch ())->arch_name,
177 arch = gdbarch_bfd_arch_info (target_gdbarch ())->arch_name;
178 endian = gdbarch_byte_order (target_gdbarch ())
179 == BFD_ENDIAN_BIG ? "be" : "le";
182 xsnprintf (arch_path, sizeof (arch_path), "%s/%s%s", nto_root, arch, endian);
184 xsnprintf (buf, sizeof (buf), "set solib-absolute-prefix %s", arch_path);
185 execute_command (buf, 0);
189 nto_parse_redirection (char *pargv[], const char **pin, const char **pout,
193 const char *in, *out, *err, *p;
196 for (n = 0; pargv[n]; n++);
203 argv = XCNEWVEC (char *, n + 1);
205 for (i = 0, n = 0; n < argc; n++)
224 else if (*p++ == '2' && *p++ == '>')
226 if (*p == '&' && *(p + 1) == '1')
234 argv[i++] = pargv[n];
243 lm_addr (struct so_list *so)
245 lm_info_svr4 *li = (lm_info_svr4 *) so->lm_info;
251 nto_truncate_ptr (CORE_ADDR addr)
253 if (gdbarch_ptr_bit (target_gdbarch ()) == sizeof (CORE_ADDR) * 8)
254 /* We don't need to truncate anything, and the bit twiddling below
255 will fail due to overflow problems. */
258 return addr & (((CORE_ADDR) 1 << gdbarch_ptr_bit (target_gdbarch ())) - 1);
261 static Elf_Internal_Phdr *
262 find_load_phdr (bfd *abfd)
264 Elf_Internal_Phdr *phdr;
267 if (!elf_tdata (abfd))
270 phdr = elf_tdata (abfd)->phdr;
271 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
273 if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
280 nto_relocate_section_addresses (struct so_list *so, struct target_section *sec)
282 /* Neutrino treats the l_addr base address field in link.h as different than
283 the base address in the System V ABI and so the offset needs to be
284 calculated and applied to relocations. */
285 Elf_Internal_Phdr *phdr = find_load_phdr (sec->the_bfd_section->owner);
286 unsigned vaddr = phdr ? phdr->p_vaddr : 0;
288 sec->addr = nto_truncate_ptr (sec->addr + lm_addr (so) - vaddr);
289 sec->endaddr = nto_truncate_ptr (sec->endaddr + lm_addr (so) - vaddr);
292 /* This is cheating a bit because our linker code is in libc.so. If we
293 ever implement lazy linking, this may need to be re-examined. */
295 nto_in_dynsym_resolve_code (CORE_ADDR pc)
297 if (in_plt_section (pc))
303 nto_dummy_supply_regset (struct regcache *regcache, char *regs)
309 nto_sniff_abi_note_section (bfd *abfd, asection *sect, void *obj)
311 const char *sectname;
312 unsigned int sectsize;
313 /* Buffer holding the section contents. */
315 unsigned int namelen;
317 const unsigned sizeof_Elf_Nhdr = 12;
319 sectname = bfd_get_section_name (abfd, sect);
320 sectsize = bfd_section_size (abfd, sect);
325 if (sectname != NULL && strstr (sectname, QNX_INFO_SECT_NAME) != NULL)
326 *(enum gdb_osabi *) obj = GDB_OSABI_QNXNTO;
327 else if (sectname != NULL && strstr (sectname, "note") != NULL
328 && sectsize > sizeof_Elf_Nhdr)
330 note = XNEWVEC (char, sectsize);
331 bfd_get_section_contents (abfd, sect, note, 0, sectsize);
332 namelen = (unsigned int) bfd_h_get_32 (abfd, note);
333 name = note + sizeof_Elf_Nhdr;
334 if (sectsize >= namelen + sizeof_Elf_Nhdr
335 && namelen == sizeof (QNX_NOTE_NAME)
336 && 0 == strcmp (name, QNX_NOTE_NAME))
337 *(enum gdb_osabi *) obj = GDB_OSABI_QNXNTO;
344 nto_elf_osabi_sniffer (bfd *abfd)
346 enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
348 bfd_map_over_sections (abfd,
349 nto_sniff_abi_note_section,
355 static const char *nto_thread_state_str[] =
358 "RUNNING", /* 1 0x01 */
359 "READY", /* 2 0x02 */
360 "STOPPED", /* 3 0x03 */
362 "RECEIVE", /* 5 0x05 */
363 "REPLY", /* 6 0x06 */
364 "STACK", /* 7 0x07 */
365 "WAITTHREAD", /* 8 0x08 */
366 "WAITPAGE", /* 9 0x09 */
367 "SIGSUSPEND", /* 10 0x0a */
368 "SIGWAITINFO", /* 11 0x0b */
369 "NANOSLEEP", /* 12 0x0c */
370 "MUTEX", /* 13 0x0d */
371 "CONDVAR", /* 14 0x0e */
372 "JOIN", /* 15 0x0f */
373 "INTR", /* 16 0x10 */
375 "WAITCTX", /* 18 0x12 */
376 "NET_SEND", /* 19 0x13 */
377 "NET_REPLY" /* 20 0x14 */
381 nto_extra_thread_info (struct target_ops *self, struct thread_info *ti)
383 if (ti != NULL && ti->priv != NULL)
385 nto_thread_info *priv = get_nto_thread_info (ti);
387 if (priv->state < ARRAY_SIZE (nto_thread_state_str))
388 return nto_thread_state_str [priv->state];
394 nto_initialize_signals (void)
396 /* We use SIG45 for pulses, or something, so nostop, noprint
398 signal_stop_update (gdb_signal_from_name ("SIG45"), 0);
399 signal_print_update (gdb_signal_from_name ("SIG45"), 0);
400 signal_pass_update (gdb_signal_from_name ("SIG45"), 1);
402 /* By default we don't want to stop on these two, but we do want to pass. */
403 #if defined(SIGSELECT)
404 signal_stop_update (SIGSELECT, 0);
405 signal_print_update (SIGSELECT, 0);
406 signal_pass_update (SIGSELECT, 1);
409 #if defined(SIGPHOTON)
410 signal_stop_update (SIGPHOTON, 0);
411 signal_print_update (SIGPHOTON, 0);
412 signal_pass_update (SIGPHOTON, 1);
416 /* Read AUXV from initial_stack. */
418 nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack, gdb_byte *readbuf,
419 LONGEST len, size_t sizeof_auxv_t)
421 gdb_byte targ32[4]; /* For 32 bit target values. */
422 gdb_byte targ64[8]; /* For 64 bit target values. */
423 CORE_ADDR data_ofs = 0;
425 LONGEST len_read = 0;
427 enum bfd_endian byte_order;
430 if (sizeof_auxv_t == 16)
435 /* Skip over argc, argv and envp... Comment from ldd.c:
437 The startup frame is set-up so that we have:
442 envp1 <----- void *frame + (argc + 2) * sizeof(char *)
447 argc <------ void * frame
449 On entry to ldd, frame gives the address of argc on the stack. */
450 /* Read argc. 4 bytes on both 64 and 32 bit arches and luckily little
451 * endian. So we just read first 4 bytes. */
452 if (target_read_memory (initial_stack + data_ofs, targ32, 4) != 0)
455 byte_order = gdbarch_byte_order (target_gdbarch ());
457 anint = extract_unsigned_integer (targ32, sizeof (targ32), byte_order);
459 /* Size of pointer is assumed to be 4 bytes (32 bit arch.) */
460 data_ofs += (anint + 2) * ptr_size; /* + 2 comes from argc itself and
461 NULL terminating pointer in
464 /* Now loop over env table: */
466 while (target_read_memory (initial_stack + data_ofs, targ64, ptr_size)
469 if (extract_unsigned_integer (targ64, ptr_size, byte_order) == 0)
470 anint = 1; /* Keep looping until non-null entry is found. */
473 data_ofs += ptr_size;
475 initial_stack += data_ofs;
477 memset (readbuf, 0, len);
479 while (len_read <= len-sizeof_auxv_t)
481 if (target_read_memory (initial_stack + len_read, buff, sizeof_auxv_t)
484 /* Both 32 and 64 bit structures have int as the first field. */
485 const ULONGEST a_type
486 = extract_unsigned_integer (buff, sizeof (targ32), byte_order);
488 if (a_type == AT_NULL)
490 buff += sizeof_auxv_t;
491 len_read += sizeof_auxv_t;
499 /* Allocate new nto_inferior_data object. */
501 static struct nto_inferior_data *
502 nto_new_inferior_data (void)
504 struct nto_inferior_data *const inf_data
505 = XCNEW (struct nto_inferior_data);
510 /* Free inferior data. */
513 nto_inferior_data_cleanup (struct inferior *const inf, void *const dat)
518 /* Return nto_inferior_data for the given INFERIOR. If not yet created,
521 struct nto_inferior_data *
522 nto_inferior_data (struct inferior *const inferior)
524 struct inferior *const inf = inferior ? inferior : current_inferior ();
525 struct nto_inferior_data *inf_data;
527 gdb_assert (inf != NULL);
530 = (struct nto_inferior_data *) inferior_data (inf, nto_inferior_data_reg);
531 if (inf_data == NULL)
533 set_inferior_data (inf, nto_inferior_data_reg,
534 (inf_data = nto_new_inferior_data ()));
541 _initialize_nto_tdep (void)
543 nto_inferior_data_reg
544 = register_inferior_data_with_cleanup (NULL, nto_inferior_data_cleanup);