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a70dc898 RP |
1 | /* Low level MIPS interface to ptrace, for GDB when running under Unix. |
2 | Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc. | |
3 | Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU | |
4 | and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "gdbcore.h" | |
25 | ||
26 | /* For now we stub this out; sgi core format is super-hairy (and completely | |
27 | different in the new release). | |
28 | For most mips systems, this function is defined in coredep.c. */ | |
29 | ||
30 | #if defined(sgi) | |
31 | void | |
32 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) | |
33 | char *core_reg_sect; | |
34 | unsigned core_reg_size; | |
35 | int which; | |
36 | unsigned int reg_addr; | |
37 | { | |
38 | return; | |
39 | } | |
40 | #endif | |
41 | ||
42 | /* Access to the inferior is only good for native systems, not cross. | |
43 | I am not sure why this is stubbed out on SGI... --gnu@cygnus.com */ | |
44 | ||
45 | #if defined(sgi) || !defined(GDB_TARGET_IS_MIPS) | |
46 | ||
47 | /* ARGSUSED */ | |
48 | void | |
49 | fetch_inferior_registers (regno) | |
50 | int regno; | |
51 | { | |
52 | return; | |
53 | } | |
54 | ||
55 | /* ARGSUSED */ | |
56 | void | |
57 | store_inferior_registers (regno) | |
58 | int regno; | |
59 | { | |
60 | return; | |
61 | } | |
62 | ||
63 | ||
64 | #else | |
65 | ||
66 | /* DECstation native... */ | |
67 | ||
68 | #include <sys/ptrace.h> | |
69 | ||
70 | /* Map gdb internal register number to ptrace ``address''. | |
71 | These ``addresses'' are defined in DECstation <sys/ptrace.h> */ | |
72 | ||
73 | #define REGISTER_PTRACE_ADDR(regno) \ | |
74 | (regno < 32 ? GPR_BASE + regno \ | |
75 | : regno == PC_REGNUM ? PC \ | |
76 | : regno == CAUSE_REGNUM ? CAUSE \ | |
77 | : regno == HI_REGNUM ? MMHI \ | |
78 | : regno == LO_REGNUM ? MMLO \ | |
79 | : regno == FCRCS_REGNUM ? FPC_CSR \ | |
80 | : regno == FCRIR_REGNUM ? FPC_EIR \ | |
81 | : regno >= FP0_REGNUM ? FPR_BASE + (regno - FP0_REGNUM) \ | |
82 | : 0) | |
83 | ||
84 | static const char zerobuf[MAX_REGISTER_RAW_SIZE]; | |
85 | ||
86 | /* Get all registers from the inferior */ | |
87 | ||
88 | void | |
89 | fetch_inferior_registers (regno) | |
90 | int regno; | |
91 | { | |
92 | register unsigned int regaddr; | |
93 | char buf[MAX_REGISTER_RAW_SIZE]; | |
94 | register int i; | |
95 | ||
96 | registers_fetched (); | |
97 | ||
98 | for (regno = 1; regno < NUM_REGS; regno++) | |
99 | { | |
100 | regaddr = REGISTER_PTRACE_ADDR (regno); | |
101 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) | |
102 | { | |
103 | *(int *) &buf[i] = ptrace (PT_READ_U, inferior_pid, | |
104 | (PTRACE_ARG3_TYPE) regaddr, 0); | |
105 | regaddr += sizeof (int); | |
106 | } | |
107 | supply_register (regno, buf); | |
108 | } | |
109 | ||
110 | supply_register (ZERO_REGNUM, zerobuf); | |
111 | /* Frame ptr reg must appear to be 0; it is faked by stack handling code. */ | |
112 | supply_register (FP_REGNUM, zerobuf); | |
113 | } | |
114 | ||
115 | /* Store our register values back into the inferior. | |
116 | If REGNO is -1, do this for all registers. | |
117 | Otherwise, REGNO specifies which register (so we can save time). */ | |
118 | ||
119 | void | |
120 | store_inferior_registers (regno) | |
121 | int regno; | |
122 | { | |
123 | register unsigned int regaddr; | |
124 | char buf[80]; | |
125 | ||
126 | if (regno == 0) | |
127 | return; | |
128 | ||
129 | if (regno > 0) | |
130 | { | |
131 | regaddr = REGISTER_PTRACE_ADDR (regno); | |
132 | errno = 0; | |
133 | ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, | |
134 | read_register (regno)); | |
135 | if (errno != 0) | |
136 | { | |
137 | sprintf (buf, "writing register number %d", regno); | |
138 | perror_with_name (buf); | |
139 | } | |
140 | } | |
141 | else | |
142 | { | |
143 | for (regno = 0; regno < NUM_REGS; regno++) | |
144 | { | |
145 | if (regno == ZERO_REGNUM || regno == PS_REGNUM | |
146 | || regno == BADVADDR_REGNUM || regno == CAUSE_REGNUM | |
147 | || regno == FCRIR_REGNUM || regno == FP_REGNUM | |
148 | || (regno >= FIRST_EMBED_REGNUM && regno <= LAST_EMBED_REGNUM)) | |
149 | continue; | |
150 | regaddr = register_addr (regno, 1); | |
151 | errno = 0; | |
152 | ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, | |
153 | read_register (regno)); | |
154 | if (errno != 0) | |
155 | { | |
156 | sprintf (buf, "writing all regs, number %d", regno); | |
157 | perror_with_name (buf); | |
158 | } | |
159 | } | |
160 | } | |
161 | } | |
162 | ||
163 | #endif /* sgi */ | |
164 | ||
165 |