| 1 | /* Machine independent GDB support for core files on systems using "regsets". |
| 2 | |
| 3 | Copyright (C) 1993-2015 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 | /* This file is used by most systems that use ELF for their core |
| 21 | dumps. This includes most systems that have SVR4-ish variant of |
| 22 | /proc. For these systems, the registers are laid out the same way |
| 23 | in core files as in the gregset_t and fpregset_t structures that |
| 24 | are used in the interaction with /proc (Irix 4 is an exception and |
| 25 | therefore doesn't use this file). Quite a few systems without a |
| 26 | SVR4-ish /proc define these structures too, and can make use of |
| 27 | this code too. */ |
| 28 | |
| 29 | #include "defs.h" |
| 30 | #include "command.h" |
| 31 | #include "gdbcore.h" |
| 32 | #include "inferior.h" |
| 33 | #include "target.h" |
| 34 | #include "regcache.h" |
| 35 | |
| 36 | #include <fcntl.h> |
| 37 | #include <time.h> |
| 38 | #ifdef HAVE_SYS_PROCFS_H |
| 39 | #include <sys/procfs.h> |
| 40 | #endif |
| 41 | |
| 42 | /* Prototypes for supply_gregset etc. */ |
| 43 | #include "gregset.h" |
| 44 | |
| 45 | /* Provide registers to GDB from a core file. |
| 46 | |
| 47 | CORE_REG_SECT points to an array of bytes, which are the contents |
| 48 | of a `note' from a core file which BFD thinks might contain |
| 49 | register contents. CORE_REG_SIZE is its size. |
| 50 | |
| 51 | WHICH says which register set corelow suspects this is: |
| 52 | 0 --- the general-purpose register set, in gregset_t format |
| 53 | 2 --- the floating-point register set, in fpregset_t format |
| 54 | |
| 55 | REG_ADDR is ignored. */ |
| 56 | |
| 57 | static void |
| 58 | fetch_core_registers (struct regcache *regcache, |
| 59 | char *core_reg_sect, |
| 60 | unsigned core_reg_size, |
| 61 | int which, |
| 62 | CORE_ADDR reg_addr) |
| 63 | { |
| 64 | gdb_gregset_t gregset; |
| 65 | gdb_fpregset_t fpregset; |
| 66 | gdb_gregset_t *gregset_p = &gregset; |
| 67 | gdb_fpregset_t *fpregset_p = &fpregset; |
| 68 | |
| 69 | switch (which) |
| 70 | { |
| 71 | case 0: |
| 72 | if (core_reg_size != sizeof (gregset)) |
| 73 | warning (_("Wrong size gregset in core file.")); |
| 74 | else |
| 75 | { |
| 76 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); |
| 77 | supply_gregset (regcache, (const gdb_gregset_t *) gregset_p); |
| 78 | } |
| 79 | break; |
| 80 | |
| 81 | case 2: |
| 82 | if (core_reg_size != sizeof (fpregset)) |
| 83 | warning (_("Wrong size fpregset in core file.")); |
| 84 | else |
| 85 | { |
| 86 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); |
| 87 | if (gdbarch_fp0_regnum (get_regcache_arch (regcache)) >= 0) |
| 88 | supply_fpregset (regcache, |
| 89 | (const gdb_fpregset_t *) fpregset_p); |
| 90 | } |
| 91 | break; |
| 92 | |
| 93 | default: |
| 94 | /* We've covered all the kinds of registers we know about here, |
| 95 | so this must be something we wouldn't know what to do with |
| 96 | anyway. Just ignore it. */ |
| 97 | break; |
| 98 | } |
| 99 | } |
| 100 | \f |
| 101 | |
| 102 | /* Register that we are able to handle ELF core file formats using |
| 103 | standard procfs "regset" structures. */ |
| 104 | |
| 105 | static struct core_fns regset_core_fns = |
| 106 | { |
| 107 | bfd_target_elf_flavour, /* core_flavour */ |
| 108 | default_check_format, /* check_format */ |
| 109 | default_core_sniffer, /* core_sniffer */ |
| 110 | fetch_core_registers, /* core_read_registers */ |
| 111 | NULL /* next */ |
| 112 | }; |
| 113 | |
| 114 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 115 | extern void _initialize_core_regset (void); |
| 116 | |
| 117 | void |
| 118 | _initialize_core_regset (void) |
| 119 | { |
| 120 | deprecated_add_core_fns (®set_core_fns); |
| 121 | } |