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 } 116 117 118 /* 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 } 133