1 /* Extract registers from a "standard" core file, for GDB.
2 Copyright (C) 1988-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* core.c is supposed to be the more machine-independent aspects of this;
21 this file is more machine-specific. */
24 #include <sys/types.h>
25 #include <sys/param.h>
27 #include "value.h" /* For supply_register. */
28 #include "inferior.h" /* For ARCH_NUM_REGS. */
30 /* These are needed on various systems to expand REGISTER_U_ADDR. */
37 # ifdef PTRACE_IN_WRONG_PLACE
39 # else /* !PTRACE_IN_WRONG_PLACE */
40 # include <sys/ptrace.h>
41 # endif /* !PTRACE_IN_WRONG_PLACE */
42 #endif /* NO_PTRACE_H */
45 #ifndef CORE_REGISTER_ADDR
46 #define CORE_REGISTER_ADDR(regno, regptr) register_addr(regno, regptr)
47 #endif /* CORE_REGISTER_ADDR */
49 #ifdef NEED_SYS_CORE_H
53 /* Extract the register values out of the core file and store
54 them where `read_register' will find them.
56 CORE_REG_SECT points to the register values themselves, read into memory.
57 CORE_REG_SIZE is the size of that area.
58 WHICH says which set of registers we are handling (0 = int, 2 = float
59 on machines where they are discontiguous).
60 REG_ADDR is the offset from u.u_ar0 to the register values relative to
61 core_reg_sect. This is used with old-fashioned core files to
62 locate the registers in a large upage-plus-stack ".reg" section.
63 Original upage address X is at location core_reg_sect+x+reg_addr.
67 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
69 unsigned core_reg_size
;
74 register unsigned int addr
;
76 register reg_ptr
= -reg_addr
; /* Original u.u_ar0 is -reg_addr. */
77 int numregs
= ARCH_NUM_REGS
;
79 /* If u.u_ar0 was an absolute address in the core file, relativize it now,
80 so we can use it as an offset into core_reg_sect. When we're done,
81 "register 0" will be at core_reg_sect+reg_ptr, and we can use
82 CORE_REGISTER_ADDR to offset to the other registers. If this is a modern
83 core file without a upage, reg_ptr will be zero and this is all a big
85 if (reg_ptr
> core_reg_size
)
86 reg_ptr
-= KERNEL_U_ADDR
;
88 for (regno
= 0; regno
< numregs
; regno
++)
90 addr
= CORE_REGISTER_ADDR (regno
, reg_ptr
);
91 if (addr
>= core_reg_size
) {
95 supply_register (regno
, core_reg_sect
+ addr
);
100 error ("Register %s not found in core file.", reg_names
[bad_reg
]);
105 #ifdef REGISTER_U_ADDR
107 /* Return the address in the core dump or inferior of register REGNO.
108 BLOCKEND is the address of the end of the user structure. */
111 register_addr (regno
, blockend
)
117 if (regno
< 0 || regno
>= ARCH_NUM_REGS
)
118 error ("Invalid register number %d.", regno
);
120 REGISTER_U_ADDR (addr
, blockend
, regno
);
125 #endif /* REGISTER_U_ADDR */
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