1 /* Extract registers from a "standard" core file, for GDB.
2 Copyright 1988-1998, 2001 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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,
19 Boston, MA 02111-1307, USA. */
21 /* Typically used on systems that have a.out format executables.
22 corefile.c is supposed to contain the more machine-independent
23 aspects of reading registers from core files, while this file is
24 more machine specific. */
31 #ifdef HAVE_SYS_PTRACE_H
32 #include <sys/ptrace.h>
36 #include <sys/types.h>
37 #include <sys/param.h>
39 #include "value.h" /* For supply_register. */
40 #include "inferior.h" /* For ARCH_NUM_REGS. */
43 /* These are needed on various systems to expand REGISTER_U_ADDR. */
45 #include "gdb_dirent.h"
51 #ifndef CORE_REGISTER_ADDR
52 #define CORE_REGISTER_ADDR(regno, regptr) register_addr(regno, regptr)
53 #endif /* CORE_REGISTER_ADDR */
55 #ifdef NEED_SYS_CORE_H
59 static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
61 void _initialize_core_aout (void);
63 /* Extract the register values out of the core file and store
64 them where `read_register' will find them.
66 CORE_REG_SECT points to the register values themselves, read into memory.
67 CORE_REG_SIZE is the size of that area.
68 WHICH says which set of registers we are handling (0 = int, 2 = float
69 on machines where they are discontiguous).
70 REG_ADDR is the offset from u.u_ar0 to the register values relative to
71 core_reg_sect. This is used with old-fashioned core files to
72 locate the registers in a large upage-plus-stack ".reg" section.
73 Original upage address X is at location core_reg_sect+x+reg_addr.
77 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
83 CORE_ADDR reg_ptr = -reg_addr; /* Original u.u_ar0 is -reg_addr. */
84 int numregs = ARCH_NUM_REGS;
86 /* If u.u_ar0 was an absolute address in the core file, relativize it now,
87 so we can use it as an offset into core_reg_sect. When we're done,
88 "register 0" will be at core_reg_sect+reg_ptr, and we can use
89 CORE_REGISTER_ADDR to offset to the other registers. If this is a modern
90 core file without a upage, reg_ptr will be zero and this is all a big
92 if (reg_ptr > core_reg_size)
93 reg_ptr -= KERNEL_U_ADDR;
95 for (regno = 0; regno < numregs; regno++)
97 addr = CORE_REGISTER_ADDR (regno, reg_ptr);
98 if (addr >= core_reg_size
102 supply_register (regno, core_reg_sect + addr);
106 error ("Register %s not found in core file.", REGISTER_NAME (bad_reg));
110 #ifdef REGISTER_U_ADDR
112 /* Return the address in the core dump or inferior of register REGNO.
113 BLOCKEND is the address of the end of the user structure. */
116 register_addr (int regno, CORE_ADDR blockend)
120 if (regno < 0 || regno >= ARCH_NUM_REGS)
121 error ("Invalid register number %d.", regno);
123 REGISTER_U_ADDR (addr, blockend, regno);
128 #endif /* REGISTER_U_ADDR */
131 /* Register that we are able to handle aout (trad-core) file formats. */
133 static struct core_fns aout_core_fns =
135 bfd_target_unknown_flavour, /* core_flavour */
136 default_check_format, /* check_format */
137 default_core_sniffer, /* core_sniffer */
138 fetch_core_registers, /* core_read_registers */
143 _initialize_core_aout (void)
145 add_core_fns (&aout_core_fns);