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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" |
c906108c SS |
27 | #include <sys/ptrace.h> |
28 | #ifdef __linux__ | |
c5aa993b JM |
29 | #include <asm/reg.h> |
30 | #include <alpha/ptrace.h> | |
c906108c | 31 | #else |
f1e3ec29 | 32 | #include <alpha/coreregs.h> |
c906108c SS |
33 | #endif |
34 | #include <sys/user.h> | |
35 | ||
36 | /* Prototypes for local functions. */ | |
37 | ||
a14ed312 KB |
38 | static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR); |
39 | static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR); | |
c906108c SS |
40 | |
41 | /* Size of elements in jmpbuf */ | |
42 | ||
43 | #define JB_ELEMENT_SIZE 8 | |
44 | ||
45 | /* The definition for JB_PC in machine/reg.h is wrong. | |
46 | And we can't get at the correct definition in setjmp.h as it is | |
47 | not always available (eg. if _POSIX_SOURCE is defined which is the | |
48 | default). As the defintion is unlikely to change (see comment | |
49 | in <setjmp.h>, define the correct value here. */ | |
50 | ||
51 | #undef JB_PC | |
52 | #define JB_PC 2 | |
53 | ||
54 | /* Figure out where the longjmp will land. | |
55 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
56 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. | |
57 | This routine returns true on success. */ | |
58 | ||
59 | int | |
fba45db2 | 60 | get_longjmp_target (CORE_ADDR *pc) |
c906108c SS |
61 | { |
62 | CORE_ADDR jb_addr; | |
63 | char raw_buffer[MAX_REGISTER_RAW_SIZE]; | |
64 | ||
c5aa993b | 65 | jb_addr = read_register (A0_REGNUM); |
c906108c | 66 | |
c5aa993b JM |
67 | if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, raw_buffer, |
68 | sizeof (CORE_ADDR))) | |
c906108c SS |
69 | return 0; |
70 | ||
c5aa993b | 71 | *pc = extract_address (raw_buffer, sizeof (CORE_ADDR)); |
c906108c SS |
72 | return 1; |
73 | } | |
74 | ||
75 | /* Extract the register values out of the core file and store | |
76 | them where `read_register' will find them. | |
77 | ||
78 | CORE_REG_SECT points to the register values themselves, read into memory. | |
79 | CORE_REG_SIZE is the size of that area. | |
80 | WHICH says which set of registers we are handling (0 = int, 2 = float | |
c5aa993b | 81 | on machines where they are discontiguous). |
c906108c | 82 | REG_ADDR is the offset from u.u_ar0 to the register values relative to |
c5aa993b JM |
83 | core_reg_sect. This is used with old-fashioned core files to |
84 | locate the registers in a large upage-plus-stack ".reg" section. | |
85 | Original upage address X is at location core_reg_sect+x+reg_addr. | |
c906108c SS |
86 | */ |
87 | ||
88 | static void | |
fba45db2 KB |
89 | fetch_osf_core_registers (char *core_reg_sect, unsigned core_reg_size, |
90 | int which, CORE_ADDR reg_addr) | |
c906108c SS |
91 | { |
92 | register int regno; | |
93 | register int addr; | |
94 | int bad_reg = -1; | |
95 | ||
f1e3ec29 AC |
96 | /* Table to map a gdb regnum to an index in the core register |
97 | section. The floating point register values are garbage in | |
98 | OSF/1.2 core files. OSF5 uses different names for the register | |
99 | enum list, need to handle two cases. The actual values are the | |
100 | same. */ | |
c906108c SS |
101 | static int core_reg_mapping[NUM_REGS] = |
102 | { | |
f1e3ec29 AC |
103 | #ifdef NCF_REGS |
104 | #define EFL NCF_REGS | |
105 | CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6, | |
106 | CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6, | |
107 | CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9, | |
108 | CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_SP, -1, | |
109 | EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, | |
110 | EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, | |
111 | EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, | |
112 | EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, | |
113 | CF_PC, -1 | |
114 | #else | |
c906108c | 115 | #define EFL (EF_SIZE / 8) |
c5aa993b JM |
116 | EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6, |
117 | EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6, | |
118 | EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9, | |
119 | EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1, | |
120 | EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7, | |
121 | EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15, | |
122 | EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23, | |
123 | EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31, | |
124 | EF_PC, -1 | |
f1e3ec29 | 125 | #endif |
c906108c | 126 | }; |
c5aa993b JM |
127 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = |
128 | {0}; | |
c906108c SS |
129 | |
130 | for (regno = 0; regno < NUM_REGS; regno++) | |
131 | { | |
132 | if (CANNOT_FETCH_REGISTER (regno)) | |
133 | { | |
134 | supply_register (regno, zerobuf); | |
135 | continue; | |
136 | } | |
137 | addr = 8 * core_reg_mapping[regno]; | |
138 | if (addr < 0 || addr >= core_reg_size) | |
139 | { | |
140 | if (bad_reg < 0) | |
141 | bad_reg = regno; | |
142 | } | |
143 | else | |
144 | { | |
145 | supply_register (regno, core_reg_sect + addr); | |
146 | } | |
147 | } | |
148 | if (bad_reg >= 0) | |
149 | { | |
150 | error ("Register %s not found in core file.", REGISTER_NAME (bad_reg)); | |
151 | } | |
152 | } | |
153 | ||
154 | static void | |
fba45db2 KB |
155 | fetch_elf_core_registers (char *core_reg_sect, unsigned core_reg_size, |
156 | int which, CORE_ADDR reg_addr) | |
c906108c | 157 | { |
c5aa993b | 158 | if (core_reg_size < 32 * 8) |
c906108c SS |
159 | { |
160 | error ("Core file register section too small (%u bytes).", core_reg_size); | |
161 | return; | |
162 | } | |
163 | ||
164 | if (which == 2) | |
165 | { | |
166 | /* The FPU Registers. */ | |
c5aa993b JM |
167 | memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 31 * 8); |
168 | memset (®isters[REGISTER_BYTE (FP0_REGNUM + 31)], 0, 8); | |
c906108c SS |
169 | memset (®ister_valid[FP0_REGNUM], 1, 32); |
170 | } | |
171 | else | |
172 | { | |
173 | /* The General Registers. */ | |
c5aa993b JM |
174 | memcpy (®isters[REGISTER_BYTE (V0_REGNUM)], core_reg_sect, 31 * 8); |
175 | memcpy (®isters[REGISTER_BYTE (PC_REGNUM)], core_reg_sect + 31 * 8, 8); | |
c906108c SS |
176 | memset (®isters[REGISTER_BYTE (ZERO_REGNUM)], 0, 8); |
177 | memset (®ister_valid[V0_REGNUM], 1, 32); | |
178 | register_valid[PC_REGNUM] = 1; | |
179 | } | |
180 | } | |
181 | ||
182 | ||
183 | /* Map gdb internal register number to a ptrace ``address''. | |
184 | These ``addresses'' are defined in <sys/ptrace.h> */ | |
185 | ||
186 | #define REGISTER_PTRACE_ADDR(regno) \ | |
187 | (regno < FP0_REGNUM ? GPR_BASE + (regno) \ | |
188 | : regno == PC_REGNUM ? PC \ | |
189 | : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \ | |
190 | : 0) | |
191 | ||
192 | /* Return the ptrace ``address'' of register REGNO. */ | |
193 | ||
194 | CORE_ADDR | |
fba45db2 | 195 | register_addr (int regno, CORE_ADDR blockend) |
c906108c SS |
196 | { |
197 | return REGISTER_PTRACE_ADDR (regno); | |
198 | } | |
199 | ||
200 | int | |
fba45db2 | 201 | kernel_u_size (void) |
c906108c SS |
202 | { |
203 | return (sizeof (struct user)); | |
204 | } | |
205 | ||
206 | #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T) | |
207 | #include <sys/procfs.h> | |
208 | ||
c60c0f5f MS |
209 | /* Prototypes for supply_gregset etc. */ |
210 | #include "gregset.h" | |
211 | ||
c906108c SS |
212 | /* |
213 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
214 | */ | |
215 | ||
c5aa993b | 216 | void |
ce589877 | 217 | supply_gregset (gdb_gregset_t *gregsetp) |
c906108c SS |
218 | { |
219 | register int regi; | |
220 | register long *regp = ALPHA_REGSET_BASE (gregsetp); | |
c5aa993b JM |
221 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = |
222 | {0}; | |
c906108c SS |
223 | |
224 | for (regi = 0; regi < 31; regi++) | |
c5aa993b | 225 | supply_register (regi, (char *) (regp + regi)); |
c906108c | 226 | |
c5aa993b | 227 | supply_register (PC_REGNUM, (char *) (regp + 31)); |
c906108c SS |
228 | |
229 | /* Fill inaccessible registers with zero. */ | |
230 | supply_register (ZERO_REGNUM, zerobuf); | |
231 | supply_register (FP_REGNUM, zerobuf); | |
232 | } | |
233 | ||
234 | void | |
ce589877 | 235 | fill_gregset (gdb_gregset_t *gregsetp, int regno) |
c906108c SS |
236 | { |
237 | int regi; | |
238 | register long *regp = ALPHA_REGSET_BASE (gregsetp); | |
239 | ||
240 | for (regi = 0; regi < 31; regi++) | |
241 | if ((regno == -1) || (regno == regi)) | |
242 | *(regp + regi) = *(long *) ®isters[REGISTER_BYTE (regi)]; | |
243 | ||
244 | if ((regno == -1) || (regno == PC_REGNUM)) | |
245 | *(regp + 31) = *(long *) ®isters[REGISTER_BYTE (PC_REGNUM)]; | |
246 | } | |
247 | ||
248 | /* | |
249 | * Now we do the same thing for floating-point registers. | |
250 | * Again, see the comments in m68k-tdep.c. | |
251 | */ | |
252 | ||
253 | void | |
ce589877 | 254 | supply_fpregset (gdb_fpregset_t *fpregsetp) |
c906108c SS |
255 | { |
256 | register int regi; | |
257 | register long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
258 | ||
259 | for (regi = 0; regi < 32; regi++) | |
c5aa993b | 260 | supply_register (regi + FP0_REGNUM, (char *) (regp + regi)); |
c906108c SS |
261 | } |
262 | ||
263 | void | |
ce589877 | 264 | fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) |
c906108c SS |
265 | { |
266 | int regi; | |
267 | register long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
268 | ||
269 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
270 | { | |
271 | if ((regno == -1) || (regno == regi)) | |
272 | { | |
273 | *(regp + regi - FP0_REGNUM) = | |
274 | *(long *) ®isters[REGISTER_BYTE (regi)]; | |
275 | } | |
276 | } | |
277 | } | |
278 | #endif | |
c906108c | 279 | \f |
c5aa993b | 280 | |
c906108c SS |
281 | /* Register that we are able to handle alpha core file formats. */ |
282 | ||
283 | static struct core_fns alpha_osf_core_fns = | |
284 | { | |
285 | /* This really is bfd_target_unknown_flavour. */ | |
286 | ||
2acceee2 JM |
287 | bfd_target_unknown_flavour, /* core_flavour */ |
288 | default_check_format, /* check_format */ | |
289 | default_core_sniffer, /* core_sniffer */ | |
290 | fetch_osf_core_registers, /* core_read_registers */ | |
291 | NULL /* next */ | |
c906108c SS |
292 | }; |
293 | ||
294 | static struct core_fns alpha_elf_core_fns = | |
295 | { | |
2acceee2 JM |
296 | bfd_target_elf_flavour, /* core_flavour */ |
297 | default_check_format, /* check_format */ | |
298 | default_core_sniffer, /* core_sniffer */ | |
299 | fetch_elf_core_registers, /* core_read_registers */ | |
300 | NULL /* next */ | |
c906108c SS |
301 | }; |
302 | ||
303 | void | |
fba45db2 | 304 | _initialize_core_alpha (void) |
c906108c SS |
305 | { |
306 | add_core_fns (&alpha_osf_core_fns); | |
307 | add_core_fns (&alpha_elf_core_fns); | |
308 | } |