Commit | Line | Data |
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c906108c | 1 | /* Low level Alpha interface, for GDB when running native. |
b6ba6518 KB |
2 | Copyright 1993, 1995, 1996, 1998, 1999, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "gdbcore.h" | |
25 | #include "target.h" | |
4e052eda | 26 | #include "regcache.h" |
dc129d82 JT |
27 | |
28 | #include "alpha-tdep.h" | |
29 | ||
c906108c SS |
30 | #include <sys/ptrace.h> |
31 | #ifdef __linux__ | |
c5aa993b JM |
32 | #include <asm/reg.h> |
33 | #include <alpha/ptrace.h> | |
c906108c | 34 | #else |
f1e3ec29 | 35 | #include <alpha/coreregs.h> |
c906108c SS |
36 | #endif |
37 | #include <sys/user.h> | |
38 | ||
39 | /* Prototypes for local functions. */ | |
40 | ||
a14ed312 KB |
41 | static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR); |
42 | static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR); | |
c906108c | 43 | |
c906108c SS |
44 | /* Extract the register values out of the core file and store |
45 | them where `read_register' will find them. | |
46 | ||
47 | CORE_REG_SECT points to the register values themselves, read into memory. | |
48 | CORE_REG_SIZE is the size of that area. | |
49 | WHICH says which set of registers we are handling (0 = int, 2 = float | |
c5aa993b | 50 | on machines where they are discontiguous). |
c906108c | 51 | REG_ADDR is the offset from u.u_ar0 to the register values relative to |
c5aa993b JM |
52 | core_reg_sect. This is used with old-fashioned core files to |
53 | locate the registers in a large upage-plus-stack ".reg" section. | |
54 | Original upage address X is at location core_reg_sect+x+reg_addr. | |
c906108c SS |
55 | */ |
56 | ||
57 | static void | |
fba45db2 KB |
58 | fetch_osf_core_registers (char *core_reg_sect, unsigned core_reg_size, |
59 | int which, CORE_ADDR reg_addr) | |
c906108c SS |
60 | { |
61 | register int regno; | |
62 | register int addr; | |
63 | int bad_reg = -1; | |
64 | ||
f1e3ec29 AC |
65 | /* Table to map a gdb regnum to an index in the core register |
66 | section. The floating point register values are garbage in | |
67 | OSF/1.2 core files. OSF5 uses different names for the register | |
68 | enum list, need to handle two cases. The actual values are the | |
69 | same. */ | |
b70d2aee | 70 | static int core_reg_mapping[ALPHA_NUM_REGS] = |
c906108c | 71 | { |
f1e3ec29 AC |
72 | #ifdef NCF_REGS |
73 | #define EFL NCF_REGS | |
74 | CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6, | |
75 | CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6, | |
76 | CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9, | |
77 | CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1, | |
78 | EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, | |
79 | EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, | |
80 | EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, | |
81 | EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, | |
82 | CF_PC, -1 | |
83 | #else | |
c906108c | 84 | #define EFL (EF_SIZE / 8) |
c5aa993b JM |
85 | EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6, |
86 | EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6, | |
87 | EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9, | |
88 | EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1, | |
89 | EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, | |
90 | EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, | |
91 | EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, | |
92 | EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, | |
93 | EF_PC, -1 | |
f1e3ec29 | 94 | #endif |
c906108c | 95 | }; |
b70d2aee | 96 | static char zerobuf[ALPHA_MAX_REGISTER_RAW_SIZE] = |
c5aa993b | 97 | {0}; |
c906108c SS |
98 | |
99 | for (regno = 0; regno < NUM_REGS; regno++) | |
100 | { | |
101 | if (CANNOT_FETCH_REGISTER (regno)) | |
102 | { | |
103 | supply_register (regno, zerobuf); | |
104 | continue; | |
105 | } | |
106 | addr = 8 * core_reg_mapping[regno]; | |
107 | if (addr < 0 || addr >= core_reg_size) | |
108 | { | |
109 | if (bad_reg < 0) | |
110 | bad_reg = regno; | |
111 | } | |
112 | else | |
113 | { | |
114 | supply_register (regno, core_reg_sect + addr); | |
115 | } | |
116 | } | |
117 | if (bad_reg >= 0) | |
118 | { | |
119 | error ("Register %s not found in core file.", REGISTER_NAME (bad_reg)); | |
120 | } | |
121 | } | |
122 | ||
123 | static void | |
fba45db2 KB |
124 | fetch_elf_core_registers (char *core_reg_sect, unsigned core_reg_size, |
125 | int which, CORE_ADDR reg_addr) | |
c906108c | 126 | { |
c5aa993b | 127 | if (core_reg_size < 32 * 8) |
c906108c SS |
128 | { |
129 | error ("Core file register section too small (%u bytes).", core_reg_size); | |
130 | return; | |
131 | } | |
132 | ||
133 | if (which == 2) | |
134 | { | |
135 | /* The FPU Registers. */ | |
524d7c18 AC |
136 | memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
137 | core_reg_sect, 31 * 8); | |
138 | memset (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM + 31)], 0, 8); | |
8262ee23 | 139 | memset (&deprecated_register_valid[FP0_REGNUM], 1, 32); |
c906108c SS |
140 | } |
141 | else | |
142 | { | |
143 | /* The General Registers. */ | |
524d7c18 AC |
144 | memcpy (&deprecated_registers[REGISTER_BYTE (ALPHA_V0_REGNUM)], |
145 | core_reg_sect, 31 * 8); | |
146 | memcpy (&deprecated_registers[REGISTER_BYTE (PC_REGNUM)], | |
147 | core_reg_sect + 31 * 8, 8); | |
148 | memset (&deprecated_registers[REGISTER_BYTE (ALPHA_ZERO_REGNUM)], 0, 8); | |
8262ee23 AC |
149 | memset (&deprecated_register_valid[ALPHA_V0_REGNUM], 1, 32); |
150 | deprecated_register_valid[PC_REGNUM] = 1; | |
c906108c SS |
151 | } |
152 | } | |
153 | ||
154 | ||
155 | /* Map gdb internal register number to a ptrace ``address''. | |
156 | These ``addresses'' are defined in <sys/ptrace.h> */ | |
157 | ||
158 | #define REGISTER_PTRACE_ADDR(regno) \ | |
159 | (regno < FP0_REGNUM ? GPR_BASE + (regno) \ | |
160 | : regno == PC_REGNUM ? PC \ | |
161 | : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \ | |
162 | : 0) | |
163 | ||
164 | /* Return the ptrace ``address'' of register REGNO. */ | |
165 | ||
166 | CORE_ADDR | |
fba45db2 | 167 | register_addr (int regno, CORE_ADDR blockend) |
c906108c SS |
168 | { |
169 | return REGISTER_PTRACE_ADDR (regno); | |
170 | } | |
171 | ||
172 | int | |
fba45db2 | 173 | kernel_u_size (void) |
c906108c SS |
174 | { |
175 | return (sizeof (struct user)); | |
176 | } | |
177 | ||
178 | #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T) | |
179 | #include <sys/procfs.h> | |
180 | ||
c60c0f5f MS |
181 | /* Prototypes for supply_gregset etc. */ |
182 | #include "gregset.h" | |
183 | ||
c906108c SS |
184 | /* |
185 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
186 | */ | |
187 | ||
c5aa993b | 188 | void |
ce589877 | 189 | supply_gregset (gdb_gregset_t *gregsetp) |
c906108c SS |
190 | { |
191 | register int regi; | |
192 | register long *regp = ALPHA_REGSET_BASE (gregsetp); | |
b70d2aee | 193 | static char zerobuf[ALPHA_MAX_REGISTER_RAW_SIZE] = |
c5aa993b | 194 | {0}; |
c906108c SS |
195 | |
196 | for (regi = 0; regi < 31; regi++) | |
c5aa993b | 197 | supply_register (regi, (char *) (regp + regi)); |
c906108c | 198 | |
c5aa993b | 199 | supply_register (PC_REGNUM, (char *) (regp + 31)); |
c906108c SS |
200 | |
201 | /* Fill inaccessible registers with zero. */ | |
dc129d82 | 202 | supply_register (ALPHA_ZERO_REGNUM, zerobuf); |
c906108c SS |
203 | supply_register (FP_REGNUM, zerobuf); |
204 | } | |
205 | ||
206 | void | |
ce589877 | 207 | fill_gregset (gdb_gregset_t *gregsetp, int regno) |
c906108c SS |
208 | { |
209 | int regi; | |
210 | register long *regp = ALPHA_REGSET_BASE (gregsetp); | |
211 | ||
212 | for (regi = 0; regi < 31; regi++) | |
213 | if ((regno == -1) || (regno == regi)) | |
524d7c18 | 214 | *(regp + regi) = *(long *) &deprecated_registers[REGISTER_BYTE (regi)]; |
c906108c SS |
215 | |
216 | if ((regno == -1) || (regno == PC_REGNUM)) | |
524d7c18 | 217 | *(regp + 31) = *(long *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)]; |
c906108c SS |
218 | } |
219 | ||
220 | /* | |
221 | * Now we do the same thing for floating-point registers. | |
222 | * Again, see the comments in m68k-tdep.c. | |
223 | */ | |
224 | ||
225 | void | |
ce589877 | 226 | supply_fpregset (gdb_fpregset_t *fpregsetp) |
c906108c SS |
227 | { |
228 | register int regi; | |
229 | register long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
230 | ||
231 | for (regi = 0; regi < 32; regi++) | |
c5aa993b | 232 | supply_register (regi + FP0_REGNUM, (char *) (regp + regi)); |
c906108c SS |
233 | } |
234 | ||
235 | void | |
ce589877 | 236 | fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) |
c906108c SS |
237 | { |
238 | int regi; | |
239 | register long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
240 | ||
241 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
242 | { | |
243 | if ((regno == -1) || (regno == regi)) | |
244 | { | |
245 | *(regp + regi - FP0_REGNUM) = | |
524d7c18 | 246 | *(long *) &deprecated_registers[REGISTER_BYTE (regi)]; |
c906108c SS |
247 | } |
248 | } | |
249 | } | |
250 | #endif | |
c906108c | 251 | \f |
c5aa993b | 252 | |
c906108c SS |
253 | /* Register that we are able to handle alpha core file formats. */ |
254 | ||
255 | static struct core_fns alpha_osf_core_fns = | |
256 | { | |
257 | /* This really is bfd_target_unknown_flavour. */ | |
258 | ||
2acceee2 JM |
259 | bfd_target_unknown_flavour, /* core_flavour */ |
260 | default_check_format, /* check_format */ | |
261 | default_core_sniffer, /* core_sniffer */ | |
262 | fetch_osf_core_registers, /* core_read_registers */ | |
263 | NULL /* next */ | |
c906108c SS |
264 | }; |
265 | ||
266 | static struct core_fns alpha_elf_core_fns = | |
267 | { | |
2acceee2 JM |
268 | bfd_target_elf_flavour, /* core_flavour */ |
269 | default_check_format, /* check_format */ | |
270 | default_core_sniffer, /* core_sniffer */ | |
271 | fetch_elf_core_registers, /* core_read_registers */ | |
272 | NULL /* next */ | |
c906108c SS |
273 | }; |
274 | ||
275 | void | |
fba45db2 | 276 | _initialize_core_alpha (void) |
c906108c SS |
277 | { |
278 | add_core_fns (&alpha_osf_core_fns); | |
279 | add_core_fns (&alpha_elf_core_fns); | |
280 | } |