| 1 | /* Target-dependent code for FreeBSD, architecture-independent. |
| 2 | |
| 3 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbcore.h" |
| 22 | #include "inferior.h" |
| 23 | #include "regcache.h" |
| 24 | #include "regset.h" |
| 25 | #include "gdbthread.h" |
| 26 | |
| 27 | #include "elf-bfd.h" |
| 28 | #include "fbsd-tdep.h" |
| 29 | |
| 30 | |
| 31 | static int |
| 32 | find_signalled_thread (struct thread_info *info, void *data) |
| 33 | { |
| 34 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
| 35 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
| 36 | return 1; |
| 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static enum gdb_signal |
| 42 | find_stop_signal (void) |
| 43 | { |
| 44 | struct thread_info *info = |
| 45 | iterate_over_threads (find_signalled_thread, NULL); |
| 46 | |
| 47 | if (info) |
| 48 | return info->suspend.stop_signal; |
| 49 | else |
| 50 | return GDB_SIGNAL_0; |
| 51 | } |
| 52 | |
| 53 | struct fbsd_collect_regset_section_cb_data |
| 54 | { |
| 55 | const struct regcache *regcache; |
| 56 | bfd *obfd; |
| 57 | char *note_data; |
| 58 | int *note_size; |
| 59 | }; |
| 60 | |
| 61 | static void |
| 62 | fbsd_collect_regset_section_cb (const char *sect_name, int size, |
| 63 | const struct regset *regset, |
| 64 | const char *human_name, void *cb_data) |
| 65 | { |
| 66 | char *buf; |
| 67 | struct fbsd_collect_regset_section_cb_data *data |
| 68 | = (struct fbsd_collect_regset_section_cb_data *) cb_data; |
| 69 | |
| 70 | gdb_assert (regset->collect_regset); |
| 71 | |
| 72 | buf = (char *) xmalloc (size); |
| 73 | regset->collect_regset (regset, data->regcache, -1, buf, size); |
| 74 | |
| 75 | /* PRSTATUS still needs to be treated specially. */ |
| 76 | if (strcmp (sect_name, ".reg") == 0) |
| 77 | data->note_data = (char *) elfcore_write_prstatus |
| 78 | (data->obfd, data->note_data, data->note_size, |
| 79 | ptid_get_pid (inferior_ptid), find_stop_signal (), buf); |
| 80 | else |
| 81 | data->note_data = (char *) elfcore_write_register_note |
| 82 | (data->obfd, data->note_data, data->note_size, |
| 83 | sect_name, buf, size); |
| 84 | xfree (buf); |
| 85 | } |
| 86 | |
| 87 | /* Create appropriate note sections for a corefile, returning them in |
| 88 | allocated memory. */ |
| 89 | |
| 90 | static char * |
| 91 | fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) |
| 92 | { |
| 93 | struct regcache *regcache = get_current_regcache (); |
| 94 | char *note_data; |
| 95 | Elf_Internal_Ehdr *i_ehdrp; |
| 96 | struct fbsd_collect_regset_section_cb_data data; |
| 97 | |
| 98 | /* Put a "FreeBSD" label in the ELF header. */ |
| 99 | i_ehdrp = elf_elfheader (obfd); |
| 100 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; |
| 101 | |
| 102 | gdb_assert (gdbarch_iterate_over_regset_sections_p (gdbarch)); |
| 103 | |
| 104 | data.regcache = regcache; |
| 105 | data.obfd = obfd; |
| 106 | data.note_data = NULL; |
| 107 | data.note_size = note_size; |
| 108 | target_fetch_registers (regcache, -1); |
| 109 | gdbarch_iterate_over_regset_sections (gdbarch, |
| 110 | fbsd_collect_regset_section_cb, |
| 111 | &data, regcache); |
| 112 | note_data = data.note_data; |
| 113 | |
| 114 | if (get_exec_file (0)) |
| 115 | { |
| 116 | const char *fname = lbasename (get_exec_file (0)); |
| 117 | char *psargs = xstrdup (fname); |
| 118 | |
| 119 | if (get_inferior_args ()) |
| 120 | psargs = reconcat (psargs, psargs, " ", get_inferior_args (), |
| 121 | (char *) NULL); |
| 122 | |
| 123 | note_data = elfcore_write_prpsinfo (obfd, note_data, note_size, |
| 124 | fname, psargs); |
| 125 | } |
| 126 | |
| 127 | return note_data; |
| 128 | } |
| 129 | |
| 130 | /* To be called from GDB_OSABI_FREEBSD_ELF handlers. */ |
| 131 | |
| 132 | void |
| 133 | fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 134 | { |
| 135 | set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes); |
| 136 | } |