PR 5646
[deliverable/binutils-gdb.git] / gdb / alpha-nat.c
1 /* Low level Alpha interface, for GDB when running native.
2 Copyright (C) 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2007, 2008
3 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 #include "defs.h"
21 #include "gdb_string.h"
22 #include "inferior.h"
23 #include "gdbcore.h"
24 #include "target.h"
25 #include "regcache.h"
26
27 #include "alpha-tdep.h"
28
29 #include <sys/ptrace.h>
30 #include <alpha/coreregs.h>
31 #include <sys/user.h>
32
33
34 /* Extract the register values out of the core file and store
35 them into REGCACHE.
36
37 CORE_REG_SECT points to the register values themselves, read into memory.
38 CORE_REG_SIZE is the size of that area.
39 WHICH says which set of registers we are handling (0 = int, 2 = float
40 on machines where they are discontiguous).
41 REG_ADDR is the offset from u.u_ar0 to the register values relative to
42 core_reg_sect. This is used with old-fashioned core files to
43 locate the registers in a large upage-plus-stack ".reg" section.
44 Original upage address X is at location core_reg_sect+x+reg_addr.
45 */
46
47 static void
48 fetch_osf_core_registers (struct regcache *regcache,
49 char *core_reg_sect, unsigned core_reg_size,
50 int which, CORE_ADDR reg_addr)
51 {
52 struct gdbarch *gdbarch = get_regcache_arch (regcache);
53 int regno;
54 int addr;
55 int bad_reg = -1;
56
57 /* Table to map a gdb regnum to an index in the core register
58 section. The floating point register values are garbage in
59 OSF/1.2 core files. OSF5 uses different names for the register
60 enum list, need to handle two cases. The actual values are the
61 same. */
62 static int const core_reg_mapping[ALPHA_NUM_REGS] =
63 {
64 #ifdef NCF_REGS
65 #define EFL NCF_REGS
66 CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6,
67 CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6,
68 CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9,
69 CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1,
70 EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7,
71 EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15,
72 EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23,
73 EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31,
74 CF_PC, -1, -1
75 #else
76 #define EFL (EF_SIZE / 8)
77 EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6,
78 EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6,
79 EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9,
80 EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1,
81 EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7,
82 EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15,
83 EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23,
84 EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31,
85 EF_PC, -1, -1
86 #endif
87 };
88
89 for (regno = 0; regno < ALPHA_NUM_REGS; regno++)
90 {
91 if (gdbarch_cannot_fetch_register (gdbarch, regno))
92 {
93 regcache_raw_supply (regcache, regno, NULL);
94 continue;
95 }
96 addr = 8 * core_reg_mapping[regno];
97 if (addr < 0 || addr >= core_reg_size)
98 {
99 /* ??? UNIQUE is a new addition. Don't generate an error. */
100 if (regno == ALPHA_UNIQUE_REGNUM)
101 {
102 regcache_raw_supply (regcache, regno, NULL);
103 continue;
104 }
105 if (bad_reg < 0)
106 bad_reg = regno;
107 }
108 else
109 {
110 regcache_raw_supply (regcache, regno, core_reg_sect + addr);
111 }
112 }
113 if (bad_reg >= 0)
114 {
115 error (_("Register %s not found in core file."),
116 gdbarch_register_name (gdbarch, bad_reg));
117 }
118 }
119
120
121 #include <sys/procfs.h>
122 /* Prototypes for supply_gregset etc. */
123 #include "gregset.h"
124
125 /*
126 * See the comment in m68k-tdep.c regarding the utility of these functions.
127 */
128
129 void
130 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
131 {
132 const long *regp = gregsetp->regs;
133
134 /* PC is in slot 32. */
135 alpha_supply_int_regs (regcache, -1, regp, regp + 31, NULL);
136 }
137
138 void
139 fill_gregset (const struct regcache *regcache,
140 gdb_gregset_t *gregsetp, int regno)
141 {
142 long *regp = gregsetp->regs;
143
144 /* PC is in slot 32. */
145 alpha_fill_int_regs (regcache, regno, regp, regp + 31, NULL);
146 }
147
148 /*
149 * Now we do the same thing for floating-point registers.
150 * Again, see the comments in m68k-tdep.c.
151 */
152
153 void
154 supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
155 {
156 const long *regp = fpregsetp->regs;
157
158 /* FPCR is in slot 32. */
159 alpha_supply_fp_regs (regcache, -1, regp, regp + 31);
160 }
161
162 void
163 fill_fpregset (const struct regcache *regcache,
164 gdb_fpregset_t *fpregsetp, int regno)
165 {
166 long *regp = fpregsetp->regs;
167
168 /* FPCR is in slot 32. */
169 alpha_fill_fp_regs (regcache, regno, regp, regp + 31);
170 }
171 \f
172
173 /* Register that we are able to handle alpha core file formats. */
174
175 static struct core_fns alpha_osf_core_fns =
176 {
177 /* This really is bfd_target_unknown_flavour. */
178
179 bfd_target_unknown_flavour, /* core_flavour */
180 default_check_format, /* check_format */
181 default_core_sniffer, /* core_sniffer */
182 fetch_osf_core_registers, /* core_read_registers */
183 NULL /* next */
184 };
185
186 void
187 _initialize_core_alpha (void)
188 {
189 deprecated_add_core_fns (&alpha_osf_core_fns);
190 }
This page took 0.049545 seconds and 4 git commands to generate.