Commit | Line | Data |
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dd3b648e | 1 | /* Extract registers from a "standard" core file, for GDB. |
a1df8e78 | 2 | Copyright (C) 1988-1995 Free Software Foundation, Inc. |
dd3b648e RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
99a7de40 | 6 | This program is free software; you can redistribute it and/or modify |
dd3b648e | 7 | it under the terms of the GNU General Public License as published by |
99a7de40 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
dd3b648e | 10 | |
99a7de40 | 11 | This program is distributed in the hope that it will be useful, |
dd3b648e RP |
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 | |
99a7de40 | 17 | along with this program; if not, write to the Free Software |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
dd3b648e | 19 | |
a1df8e78 FF |
20 | /* Typically used on systems that have a.out format executables. |
21 | corefile.c is supposed to contain the more machine-independent | |
22 | aspects of reading registers from core files, while this file is | |
23 | more machine specific. */ | |
dd3b648e | 24 | |
d747e0af | 25 | #include "defs.h" |
3ae444f8 JG |
26 | #include <sys/types.h> |
27 | #include <sys/param.h> | |
dd3b648e | 28 | #include "gdbcore.h" |
100f92e2 | 29 | #include "value.h" /* For supply_register. */ |
9a989b1f | 30 | #include "inferior.h" /* For ARCH_NUM_REGS. */ |
dd3b648e | 31 | |
b53d3945 | 32 | /* These are needed on various systems to expand REGISTER_U_ADDR. */ |
159a075e | 33 | #ifndef USG |
dd3b648e RP |
34 | #include <sys/dir.h> |
35 | #include <sys/file.h> | |
2b576293 | 36 | #include "gdb_stat.h" |
dd3b648e | 37 | #include <sys/user.h> |
fefe2ed9 JG |
38 | #ifndef NO_PTRACE_H |
39 | # ifdef PTRACE_IN_WRONG_PLACE | |
40 | # include <ptrace.h> | |
41 | # else /* !PTRACE_IN_WRONG_PLACE */ | |
42 | # include <sys/ptrace.h> | |
43 | # endif /* !PTRACE_IN_WRONG_PLACE */ | |
44 | #endif /* NO_PTRACE_H */ | |
2b88cafe | 45 | #endif |
dd3b648e | 46 | |
62a5dabc SS |
47 | #ifndef CORE_REGISTER_ADDR |
48 | #define CORE_REGISTER_ADDR(regno, regptr) register_addr(regno, regptr) | |
49 | #endif /* CORE_REGISTER_ADDR */ | |
50 | ||
073c6b2b ILT |
51 | #ifdef NEED_SYS_CORE_H |
52 | #include <sys/core.h> | |
53 | #endif | |
54 | ||
d9951af4 SG |
55 | static void fetch_core_registers PARAMS ((char *core_reg_sect, |
56 | unsigned core_reg_size, int which, | |
57 | CORE_ADDR reg_addr)); | |
b607efe7 | 58 | |
dd3b648e | 59 | /* Extract the register values out of the core file and store |
45e60270 JG |
60 | them where `read_register' will find them. |
61 | ||
62 | CORE_REG_SECT points to the register values themselves, read into memory. | |
63 | CORE_REG_SIZE is the size of that area. | |
64 | WHICH says which set of registers we are handling (0 = int, 2 = float | |
65 | on machines where they are discontiguous). | |
66 | REG_ADDR is the offset from u.u_ar0 to the register values relative to | |
67 | core_reg_sect. This is used with old-fashioned core files to | |
68 | locate the registers in a large upage-plus-stack ".reg" section. | |
69 | Original upage address X is at location core_reg_sect+x+reg_addr. | |
70 | */ | |
dd3b648e | 71 | |
a1df8e78 | 72 | static void |
45e60270 | 73 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
dd3b648e RP |
74 | char *core_reg_sect; |
75 | unsigned core_reg_size; | |
45e60270 | 76 | int which; |
d9951af4 | 77 | CORE_ADDR reg_addr; |
dd3b648e | 78 | { |
d9951af4 SG |
79 | int regno; |
80 | CORE_ADDR addr; | |
dd3b648e | 81 | int bad_reg = -1; |
d9951af4 | 82 | CORE_ADDR reg_ptr = -reg_addr; /* Original u.u_ar0 is -reg_addr. */ |
62a5dabc | 83 | int numregs = ARCH_NUM_REGS; |
45e60270 JG |
84 | |
85 | /* If u.u_ar0 was an absolute address in the core file, relativize it now, | |
86 | so we can use it as an offset into core_reg_sect. When we're done, | |
87 | "register 0" will be at core_reg_sect+reg_ptr, and we can use | |
62a5dabc | 88 | CORE_REGISTER_ADDR to offset to the other registers. If this is a modern |
45e60270 JG |
89 | core file without a upage, reg_ptr will be zero and this is all a big |
90 | NOP. */ | |
d9951af4 | 91 | if (reg_ptr > core_reg_size) |
45e60270 | 92 | reg_ptr -= KERNEL_U_ADDR; |
dd3b648e | 93 | |
62a5dabc | 94 | for (regno = 0; regno < numregs; regno++) |
dd3b648e | 95 | { |
62a5dabc | 96 | addr = CORE_REGISTER_ADDR (regno, reg_ptr); |
d9951af4 SG |
97 | if (addr >= core_reg_size |
98 | && bad_reg < 0) | |
99 | bad_reg = regno; | |
100 | else | |
101 | supply_register (regno, core_reg_sect + addr); | |
dd3b648e | 102 | } |
d9951af4 | 103 | |
299ee4e6 | 104 | if (bad_reg >= 0) |
d9951af4 | 105 | error ("Register %s not found in core file.", reg_names[bad_reg]); |
dd3b648e RP |
106 | } |
107 | ||
108 | ||
109 | #ifdef REGISTER_U_ADDR | |
110 | ||
111 | /* Return the address in the core dump or inferior of register REGNO. | |
112 | BLOCKEND is the address of the end of the user structure. */ | |
113 | ||
d9951af4 | 114 | CORE_ADDR |
dd3b648e RP |
115 | register_addr (regno, blockend) |
116 | int regno; | |
d9951af4 | 117 | CORE_ADDR blockend; |
dd3b648e | 118 | { |
d9951af4 | 119 | CORE_ADDR addr; |
dd3b648e | 120 | |
62a5dabc | 121 | if (regno < 0 || regno >= ARCH_NUM_REGS) |
dd3b648e RP |
122 | error ("Invalid register number %d.", regno); |
123 | ||
124 | REGISTER_U_ADDR (addr, blockend, regno); | |
125 | ||
126 | return addr; | |
127 | } | |
128 | ||
129 | #endif /* REGISTER_U_ADDR */ | |
a1df8e78 FF |
130 | |
131 | \f | |
132 | /* Register that we are able to handle aout (trad-core) file formats. */ | |
133 | ||
134 | static struct core_fns aout_core_fns = | |
135 | { | |
136 | bfd_target_unknown_flavour, | |
137 | fetch_core_registers, | |
138 | NULL | |
139 | }; | |
140 | ||
141 | void | |
142 | _initialize_core_aout () | |
143 | { | |
144 | add_core_fns (&aout_core_fns); | |
145 | } |