/* Extract registers from a "standard" core file, for GDB. Copyright (C) 1988-1998 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 "inferior.h" /* For ARCH_NUM_REGS. */ /* 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 = ARCH_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 >= ARCH_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); }