| /* Extract registers from a "standard" core file, for GDB. |
| Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, |
| 1999, 2000, 2001 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* Typically used on systems that have a.out format executables. |
| corefile.c is supposed to contain the more machine-independent |
| aspects of reading registers from core files, while this file is |
| more machine specific. */ |
| |
| #include "defs.h" |
| |
| #ifdef HAVE_PTRACE_H |
| #include <ptrace.h> |
| #else |
| #ifdef HAVE_SYS_PTRACE_H |
| #include <sys/ptrace.h> |
| #endif |
| #endif |
| |
| #include <sys/types.h> |
| #include <sys/param.h> |
| #include "gdbcore.h" |
| #include "value.h" /* For supply_register. */ |
| #include "regcache.h" |
| |
| /* These are needed on various systems to expand REGISTER_U_ADDR. */ |
| #ifndef USG |
| #include "gdb_dirent.h" |
| #include <sys/file.h> |
| #include "gdb_stat.h" |
| #include <sys/user.h> |
| #endif |
| |
| #ifndef CORE_REGISTER_ADDR |
| #define CORE_REGISTER_ADDR(regno, regptr) register_addr(regno, regptr) |
| #endif /* CORE_REGISTER_ADDR */ |
| |
| #ifdef NEED_SYS_CORE_H |
| #include <sys/core.h> |
| #endif |
| |
| static void fetch_core_registers (char *, unsigned, int, CORE_ADDR); |
| |
| void _initialize_core_aout (void); |
| |
| /* Extract the register values out of the core file and store |
| them where `read_register' will find them. |
| |
| CORE_REG_SECT points to the register values themselves, read into memory. |
| CORE_REG_SIZE is the size of that area. |
| WHICH says which set of registers we are handling (0 = int, 2 = float |
| on machines where they are discontiguous). |
| REG_ADDR is the offset from u.u_ar0 to the register values relative to |
| core_reg_sect. This is used with old-fashioned core files to |
| locate the registers in a large upage-plus-stack ".reg" section. |
| Original upage address X is at location core_reg_sect+x+reg_addr. |
| */ |
| |
| static void |
| fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, |
| CORE_ADDR reg_addr) |
| { |
| int regno; |
| CORE_ADDR addr; |
| int bad_reg = -1; |
| CORE_ADDR reg_ptr = -reg_addr; /* Original u.u_ar0 is -reg_addr. */ |
| int numregs = NUM_REGS; |
| |
| /* If u.u_ar0 was an absolute address in the core file, relativize it now, |
| so we can use it as an offset into core_reg_sect. When we're done, |
| "register 0" will be at core_reg_sect+reg_ptr, and we can use |
| CORE_REGISTER_ADDR to offset to the other registers. If this is a modern |
| core file without a upage, reg_ptr will be zero and this is all a big |
| NOP. */ |
| if (reg_ptr > core_reg_size) |
| reg_ptr -= KERNEL_U_ADDR; |
| |
| for (regno = 0; regno < numregs; regno++) |
| { |
| addr = CORE_REGISTER_ADDR (regno, reg_ptr); |
| if (addr >= core_reg_size |
| && bad_reg < 0) |
| bad_reg = regno; |
| else |
| supply_register (regno, core_reg_sect + addr); |
| } |
| |
| if (bad_reg >= 0) |
| error ("Register %s not found in core file.", REGISTER_NAME (bad_reg)); |
| } |
| |
| |
| #ifdef REGISTER_U_ADDR |
| |
| /* Return the address in the core dump or inferior of register REGNO. |
| BLOCKEND is the address of the end of the user structure. */ |
| |
| CORE_ADDR |
| register_addr (int regno, CORE_ADDR blockend) |
| { |
| CORE_ADDR addr; |
| |
| if (regno < 0 || regno >= NUM_REGS) |
| error ("Invalid register number %d.", regno); |
| |
| REGISTER_U_ADDR (addr, blockend, regno); |
| |
| return addr; |
| } |
| |
| #endif /* REGISTER_U_ADDR */ |
| |
| |
| /* Register that we are able to handle aout (trad-core) file formats. */ |
| |
| static struct core_fns aout_core_fns = |
| { |
| bfd_target_unknown_flavour, /* core_flavour */ |
| default_check_format, /* check_format */ |
| default_core_sniffer, /* core_sniffer */ |
| fetch_core_registers, /* core_read_registers */ |
| NULL /* next */ |
| }; |
| |
| void |
| _initialize_core_aout (void) |
| { |
| add_core_fns (&aout_core_fns); |
| } |