Commit | Line | Data |
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c906108c | 1 | /* Low level Alpha interface, for GDB when running native. |
87d1b352 | 2 | Copyright 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2003 |
b6ba6518 | 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" | |
e162d11b | 23 | #include "gdb_string.h" |
c906108c SS |
24 | #include "inferior.h" |
25 | #include "gdbcore.h" | |
26 | #include "target.h" | |
4e052eda | 27 | #include "regcache.h" |
dc129d82 JT |
28 | |
29 | #include "alpha-tdep.h" | |
30 | ||
c906108c SS |
31 | #include <sys/ptrace.h> |
32 | #ifdef __linux__ | |
c5aa993b JM |
33 | #include <asm/reg.h> |
34 | #include <alpha/ptrace.h> | |
c906108c | 35 | #else |
f1e3ec29 | 36 | #include <alpha/coreregs.h> |
c906108c SS |
37 | #endif |
38 | #include <sys/user.h> | |
39 | ||
40 | /* Prototypes for local functions. */ | |
41 | ||
a14ed312 KB |
42 | static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR); |
43 | static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR); | |
c906108c | 44 | |
c906108c SS |
45 | /* Extract the register values out of the core file and store |
46 | them where `read_register' will find them. | |
47 | ||
48 | CORE_REG_SECT points to the register values themselves, read into memory. | |
49 | CORE_REG_SIZE is the size of that area. | |
50 | WHICH says which set of registers we are handling (0 = int, 2 = float | |
c5aa993b | 51 | on machines where they are discontiguous). |
c906108c | 52 | REG_ADDR is the offset from u.u_ar0 to the register values relative to |
c5aa993b JM |
53 | core_reg_sect. This is used with old-fashioned core files to |
54 | locate the registers in a large upage-plus-stack ".reg" section. | |
55 | Original upage address X is at location core_reg_sect+x+reg_addr. | |
c906108c SS |
56 | */ |
57 | ||
58 | static void | |
fba45db2 KB |
59 | fetch_osf_core_registers (char *core_reg_sect, unsigned core_reg_size, |
60 | int which, CORE_ADDR reg_addr) | |
c906108c SS |
61 | { |
62 | register int regno; | |
63 | register int addr; | |
64 | int bad_reg = -1; | |
65 | ||
f1e3ec29 AC |
66 | /* Table to map a gdb regnum to an index in the core register |
67 | section. The floating point register values are garbage in | |
68 | OSF/1.2 core files. OSF5 uses different names for the register | |
69 | enum list, need to handle two cases. The actual values are the | |
70 | same. */ | |
b70d2aee | 71 | static int core_reg_mapping[ALPHA_NUM_REGS] = |
c906108c | 72 | { |
f1e3ec29 AC |
73 | #ifdef NCF_REGS |
74 | #define EFL NCF_REGS | |
75 | CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6, | |
76 | CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6, | |
77 | CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9, | |
78 | CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1, | |
79 | EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, | |
80 | EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, | |
81 | EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, | |
82 | EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, | |
83 | CF_PC, -1 | |
84 | #else | |
c906108c | 85 | #define EFL (EF_SIZE / 8) |
c5aa993b JM |
86 | EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6, |
87 | EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6, | |
88 | EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9, | |
89 | EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1, | |
90 | EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, | |
91 | EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, | |
92 | EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, | |
93 | EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, | |
94 | EF_PC, -1 | |
f1e3ec29 | 95 | #endif |
c906108c | 96 | }; |
b70d2aee | 97 | static char zerobuf[ALPHA_MAX_REGISTER_RAW_SIZE] = |
c5aa993b | 98 | {0}; |
c906108c SS |
99 | |
100 | for (regno = 0; regno < NUM_REGS; regno++) | |
101 | { | |
102 | if (CANNOT_FETCH_REGISTER (regno)) | |
103 | { | |
104 | supply_register (regno, zerobuf); | |
105 | continue; | |
106 | } | |
107 | addr = 8 * core_reg_mapping[regno]; | |
108 | if (addr < 0 || addr >= core_reg_size) | |
109 | { | |
110 | if (bad_reg < 0) | |
111 | bad_reg = regno; | |
112 | } | |
113 | else | |
114 | { | |
115 | supply_register (regno, core_reg_sect + addr); | |
116 | } | |
117 | } | |
118 | if (bad_reg >= 0) | |
119 | { | |
120 | error ("Register %s not found in core file.", REGISTER_NAME (bad_reg)); | |
121 | } | |
122 | } | |
123 | ||
124 | static void | |
fba45db2 KB |
125 | fetch_elf_core_registers (char *core_reg_sect, unsigned core_reg_size, |
126 | int which, CORE_ADDR reg_addr) | |
c906108c | 127 | { |
c5aa993b | 128 | if (core_reg_size < 32 * 8) |
c906108c SS |
129 | { |
130 | error ("Core file register section too small (%u bytes).", core_reg_size); | |
131 | return; | |
132 | } | |
133 | ||
134 | if (which == 2) | |
135 | { | |
136 | /* The FPU Registers. */ | |
524d7c18 AC |
137 | memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
138 | core_reg_sect, 31 * 8); | |
139 | memset (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM + 31)], 0, 8); | |
8262ee23 | 140 | memset (&deprecated_register_valid[FP0_REGNUM], 1, 32); |
c906108c SS |
141 | } |
142 | else | |
143 | { | |
144 | /* The General Registers. */ | |
524d7c18 AC |
145 | memcpy (&deprecated_registers[REGISTER_BYTE (ALPHA_V0_REGNUM)], |
146 | core_reg_sect, 31 * 8); | |
147 | memcpy (&deprecated_registers[REGISTER_BYTE (PC_REGNUM)], | |
148 | core_reg_sect + 31 * 8, 8); | |
149 | memset (&deprecated_registers[REGISTER_BYTE (ALPHA_ZERO_REGNUM)], 0, 8); | |
8262ee23 AC |
150 | memset (&deprecated_register_valid[ALPHA_V0_REGNUM], 1, 32); |
151 | deprecated_register_valid[PC_REGNUM] = 1; | |
87d1b352 RH |
152 | |
153 | if (core_reg_size >= 33 * 8) | |
154 | { | |
155 | memcpy (&deprecated_registers[REGISTER_BYTE (ALPHA_UNIQUE_REGNUM)], | |
156 | core_reg_sect + 32 * 8, 8); | |
157 | deprecated_register_valid[ALPHA_UNIQUE_REGNUM] = 1; | |
158 | } | |
c906108c SS |
159 | } |
160 | } | |
161 | ||
162 | ||
163 | /* Map gdb internal register number to a ptrace ``address''. | |
87d1b352 RH |
164 | These ``addresses'' are defined in <sys/ptrace.h>, with |
165 | the exception of ALPHA_UNIQUE_PTRACE_ADDR. */ | |
c906108c | 166 | |
87d1b352 RH |
167 | #ifndef ALPHA_UNIQUE_PTRACE_ADDR |
168 | #define ALPHA_UNIQUE_PTRACE_ADDR 0 | |
169 | #endif | |
c906108c SS |
170 | |
171 | CORE_ADDR | |
fba45db2 | 172 | register_addr (int regno, CORE_ADDR blockend) |
c906108c | 173 | { |
87d1b352 RH |
174 | if (regno == PC_REGNUM) |
175 | return PC; | |
176 | if (regno == ALPHA_UNIQUE_REGNUM) | |
177 | return ALPHA_UNIQUE_PTRACE_ADDR; | |
178 | if (regno < FP0_REGNUM) | |
179 | return GPR_BASE + regno; | |
180 | else | |
181 | return FPR_BASE + regno - FP0_REGNUM; | |
c906108c SS |
182 | } |
183 | ||
184 | int | |
fba45db2 | 185 | kernel_u_size (void) |
c906108c SS |
186 | { |
187 | return (sizeof (struct user)); | |
188 | } | |
189 | ||
190 | #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T) | |
191 | #include <sys/procfs.h> | |
192 | ||
c60c0f5f MS |
193 | /* Prototypes for supply_gregset etc. */ |
194 | #include "gregset.h" | |
195 | ||
c906108c SS |
196 | /* |
197 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
198 | */ | |
199 | ||
c5aa993b | 200 | void |
ce589877 | 201 | supply_gregset (gdb_gregset_t *gregsetp) |
c906108c SS |
202 | { |
203 | register int regi; | |
204 | register long *regp = ALPHA_REGSET_BASE (gregsetp); | |
b70d2aee | 205 | static char zerobuf[ALPHA_MAX_REGISTER_RAW_SIZE] = |
c5aa993b | 206 | {0}; |
c906108c SS |
207 | |
208 | for (regi = 0; regi < 31; regi++) | |
c5aa993b | 209 | supply_register (regi, (char *) (regp + regi)); |
c906108c | 210 | |
c5aa993b | 211 | supply_register (PC_REGNUM, (char *) (regp + 31)); |
c906108c SS |
212 | |
213 | /* Fill inaccessible registers with zero. */ | |
dc129d82 | 214 | supply_register (ALPHA_ZERO_REGNUM, zerobuf); |
0ba6dca9 | 215 | supply_register (DEPRECATED_FP_REGNUM, zerobuf); |
c906108c SS |
216 | } |
217 | ||
218 | void | |
ce589877 | 219 | fill_gregset (gdb_gregset_t *gregsetp, int regno) |
c906108c SS |
220 | { |
221 | int regi; | |
222 | register long *regp = ALPHA_REGSET_BASE (gregsetp); | |
223 | ||
224 | for (regi = 0; regi < 31; regi++) | |
225 | if ((regno == -1) || (regno == regi)) | |
524d7c18 | 226 | *(regp + regi) = *(long *) &deprecated_registers[REGISTER_BYTE (regi)]; |
c906108c SS |
227 | |
228 | if ((regno == -1) || (regno == PC_REGNUM)) | |
524d7c18 | 229 | *(regp + 31) = *(long *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)]; |
c906108c SS |
230 | } |
231 | ||
232 | /* | |
233 | * Now we do the same thing for floating-point registers. | |
234 | * Again, see the comments in m68k-tdep.c. | |
235 | */ | |
236 | ||
237 | void | |
ce589877 | 238 | supply_fpregset (gdb_fpregset_t *fpregsetp) |
c906108c SS |
239 | { |
240 | register int regi; | |
241 | register long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
242 | ||
243 | for (regi = 0; regi < 32; regi++) | |
c5aa993b | 244 | supply_register (regi + FP0_REGNUM, (char *) (regp + regi)); |
c906108c SS |
245 | } |
246 | ||
247 | void | |
ce589877 | 248 | fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) |
c906108c SS |
249 | { |
250 | int regi; | |
251 | register long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
252 | ||
253 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
254 | { | |
255 | if ((regno == -1) || (regno == regi)) | |
256 | { | |
257 | *(regp + regi - FP0_REGNUM) = | |
524d7c18 | 258 | *(long *) &deprecated_registers[REGISTER_BYTE (regi)]; |
c906108c SS |
259 | } |
260 | } | |
261 | } | |
262 | #endif | |
c906108c | 263 | \f |
c5aa993b | 264 | |
c906108c SS |
265 | /* Register that we are able to handle alpha core file formats. */ |
266 | ||
267 | static struct core_fns alpha_osf_core_fns = | |
268 | { | |
269 | /* This really is bfd_target_unknown_flavour. */ | |
270 | ||
2acceee2 JM |
271 | bfd_target_unknown_flavour, /* core_flavour */ |
272 | default_check_format, /* check_format */ | |
273 | default_core_sniffer, /* core_sniffer */ | |
274 | fetch_osf_core_registers, /* core_read_registers */ | |
275 | NULL /* next */ | |
c906108c SS |
276 | }; |
277 | ||
278 | static struct core_fns alpha_elf_core_fns = | |
279 | { | |
2acceee2 JM |
280 | bfd_target_elf_flavour, /* core_flavour */ |
281 | default_check_format, /* check_format */ | |
282 | default_core_sniffer, /* core_sniffer */ | |
283 | fetch_elf_core_registers, /* core_read_registers */ | |
284 | NULL /* next */ | |
c906108c SS |
285 | }; |
286 | ||
287 | void | |
fba45db2 | 288 | _initialize_core_alpha (void) |
c906108c SS |
289 | { |
290 | add_core_fns (&alpha_osf_core_fns); | |
291 | add_core_fns (&alpha_elf_core_fns); | |
292 | } |