| 1 | /* Machine independent GDB support for core files on systems using "regsets". |
| 2 | Copyright 1993-1996 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | |
| 21 | /* N O T E S |
| 22 | |
| 23 | This file is used by most systems that implement /proc. For these systems, |
| 24 | the general registers are laid out the same way in both the core file and |
| 25 | the gregset_p structure. The current exception to this is Irix-4.*, where |
| 26 | the gregset_p structure is split up into two pieces in the core file. |
| 27 | |
| 28 | The general register and floating point register sets are manipulated by |
| 29 | separate ioctl's. This file makes the assumption that if FP0_REGNUM is |
| 30 | defined, then support for the floating point register set is desired, |
| 31 | regardless of whether or not the actual target has floating point hardware. |
| 32 | |
| 33 | */ |
| 34 | |
| 35 | #include "defs.h" |
| 36 | |
| 37 | #include <time.h> |
| 38 | #ifdef HAVE_SYS_PROCFS_H |
| 39 | #include <sys/procfs.h> |
| 40 | #endif |
| 41 | #include <fcntl.h> |
| 42 | #include <errno.h> |
| 43 | #include "gdb_string.h" |
| 44 | |
| 45 | #include "inferior.h" |
| 46 | #include "target.h" |
| 47 | #include "command.h" |
| 48 | #include "gdbcore.h" |
| 49 | |
| 50 | static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR)); |
| 51 | |
| 52 | /* |
| 53 | |
| 54 | GLOBAL FUNCTION |
| 55 | |
| 56 | fetch_core_registers -- fetch current registers from core file |
| 57 | |
| 58 | SYNOPSIS |
| 59 | |
| 60 | void fetch_core_registers (char *core_reg_sect, |
| 61 | unsigned core_reg_size, |
| 62 | int which, CORE_ADDR reg_addr) |
| 63 | |
| 64 | DESCRIPTION |
| 65 | |
| 66 | Read the values of either the general register set (WHICH equals 0) |
| 67 | or the floating point register set (WHICH equals 2) from the core |
| 68 | file data (pointed to by CORE_REG_SECT), and update gdb's idea of |
| 69 | their current values. The CORE_REG_SIZE parameter is ignored. |
| 70 | |
| 71 | NOTES |
| 72 | |
| 73 | Use the indicated sizes to validate the gregset and fpregset |
| 74 | structures. |
| 75 | */ |
| 76 | |
| 77 | static void |
| 78 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
| 79 | char *core_reg_sect; |
| 80 | unsigned core_reg_size; |
| 81 | int which; |
| 82 | CORE_ADDR reg_addr; /* Unused in this version */ |
| 83 | { |
| 84 | #if defined (HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T) |
| 85 | gregset_t gregset; |
| 86 | fpregset_t fpregset; |
| 87 | |
| 88 | if (which == 0) |
| 89 | { |
| 90 | if (core_reg_size != sizeof (gregset)) |
| 91 | { |
| 92 | warning ("wrong size gregset struct in core file"); |
| 93 | } |
| 94 | else |
| 95 | { |
| 96 | memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset)); |
| 97 | supply_gregset (&gregset); |
| 98 | } |
| 99 | } |
| 100 | else if (which == 2) |
| 101 | { |
| 102 | if (core_reg_size != sizeof (fpregset)) |
| 103 | { |
| 104 | warning ("wrong size fpregset struct in core file"); |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset)); |
| 109 | #if defined (FP0_REGNUM) |
| 110 | supply_fpregset (&fpregset); |
| 111 | #endif |
| 112 | } |
| 113 | } |
| 114 | #endif /* defined(HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T) */ |
| 115 | } |
| 116 | |
| 117 | \f |
| 118 | /* Register that we are able to handle ELF file formats using standard |
| 119 | procfs "regset" structures. */ |
| 120 | |
| 121 | static struct core_fns regset_core_fns = |
| 122 | { |
| 123 | bfd_target_elf_flavour, |
| 124 | fetch_core_registers, |
| 125 | NULL |
| 126 | }; |
| 127 | |
| 128 | void |
| 129 | _initialize_core_regset () |
| 130 | { |
| 131 | add_core_fns (®set_core_fns); |
| 132 | } |