]>
Commit | Line | Data |
---|---|---|
dfb64f85 | 1 | /* Low level interface to ptrace, for the remote server for GDB. |
1d506c26 | 2 | Copyright (C) 1995-2024 Free Software Foundation, Inc. |
dfb64f85 DJ |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
dfb64f85 DJ |
19 | #include "linux-low.h" |
20 | ||
5826e159 | 21 | #include "nat/gdb_ptrace.h" |
dfb64f85 DJ |
22 | |
23 | #include "gdb_proc_service.h" | |
24 | ||
25 | /* The stack pointer is offset from the stack frame by a BIAS of 2047 | |
26 | (0x7ff) for 64-bit code. BIAS is likely to be defined on SPARC | |
27 | hosts, so undefine it first. */ | |
28 | #undef BIAS | |
29 | #define BIAS 2047 | |
30 | ||
31 | #ifdef HAVE_SYS_REG_H | |
32 | #include <sys/reg.h> | |
33 | #endif | |
34 | ||
35 | #define INSN_SIZE 4 | |
36 | ||
37 | #define SPARC_R_REGS_NUM 32 | |
38 | #define SPARC_F_REGS_NUM 48 | |
39 | #define SPARC_CONTROL_REGS_NUM 6 | |
40 | ||
493e2a69 MS |
41 | #define sparc_num_regs \ |
42 | (SPARC_R_REGS_NUM + SPARC_F_REGS_NUM + SPARC_CONTROL_REGS_NUM) | |
dfb64f85 | 43 | |
ef0478f6 TBA |
44 | /* Linux target op definitions for the SPARC architecture. */ |
45 | ||
46 | class sparc_target : public linux_process_target | |
47 | { | |
48 | public: | |
49 | ||
aa8d21c9 TBA |
50 | const regs_info *get_regs_info () override; |
51 | ||
3ca4edb6 TBA |
52 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
53 | ||
797bcff5 TBA |
54 | protected: |
55 | ||
56 | void low_arch_setup () override; | |
daca57a7 TBA |
57 | |
58 | bool low_cannot_fetch_register (int regno) override; | |
59 | ||
60 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
61 | |
62 | bool low_supports_breakpoints () override; | |
63 | ||
64 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
65 | ||
66 | /* No low_set_pc is needed. */ | |
d7146cda TBA |
67 | |
68 | bool low_breakpoint_at (CORE_ADDR pc) override; | |
ef0478f6 TBA |
69 | }; |
70 | ||
71 | /* The singleton target ops object. */ | |
72 | ||
73 | static sparc_target the_sparc_target; | |
74 | ||
bf9ae9d8 TBA |
75 | bool |
76 | sparc_target::low_supports_breakpoints () | |
77 | { | |
78 | return true; | |
79 | } | |
80 | ||
81 | CORE_ADDR | |
82 | sparc_target::low_get_pc (regcache *regcache) | |
83 | { | |
84 | return linux_get_pc_64bit (regcache); | |
85 | } | |
86 | ||
dfb64f85 DJ |
87 | /* Each offset is multiplied by 8, because of the register size. |
88 | These offsets apply to the buffer sent/filled by ptrace. | |
89 | Additionally, the array elements order corresponds to the .dat file, and the | |
90 | gdb's registers enumeration order. */ | |
91 | ||
92 | static int sparc_regmap[] = { | |
93 | /* These offsets correspond to GET/SETREGSET. */ | |
493e2a69 MS |
94 | -1, 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, /* g0 .. g7 */ |
95 | 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, /* o0 .. o5, sp, o7 */ | |
96 | -1, -1, -1, -1, -1, -1, -1, -1, /* l0 .. l7 */ | |
97 | -1, -1, -1, -1, -1, -1, -1, -1, /* i0 .. i5, fp, i7 */ | |
dfb64f85 DJ |
98 | |
99 | /* Floating point registers offsets correspond to GET/SETFPREGSET. */ | |
100 | 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4, /* f0 .. f7 */ | |
101 | 8*4, 9*4, 10*4, 11*4, 12*4, 13*4, 14*4, 15*4, /* f8 .. f15 */ | |
102 | 16*4, 17*4, 18*4, 19*4, 20*4, 21*4, 22*4, 23*4, /* f16 .. f23 */ | |
103 | 24*4, 25*4, 26*4, 27*4, 28*4, 29*4, 30*4, 31*4, /* f24 .. f31 */ | |
104 | ||
105 | /* F32 offset starts next to f31: 31*4+4 = 16 * 8. */ | |
1b3f6016 PA |
106 | 16*8, 17*8, 18*8, 19*8, 20*8, 21*8, 22*8, 23*8, /* f32 .. f46 */ |
107 | 24*8, 25*8, 26*8, 27*8, 28*8, 29*8, 30*8, 31*8, /* f48 .. f62 */ | |
dfb64f85 DJ |
108 | |
109 | 17 *8, /* pc */ | |
110 | 18 *8, /* npc */ | |
111 | 16 *8, /* state */ | |
493e2a69 MS |
112 | /* FSR offset also corresponds to GET/SETFPREGSET, ans is placed |
113 | next to f62. */ | |
dfb64f85 DJ |
114 | 32 *8, /* fsr */ |
115 | -1, /* fprs */ | |
116 | /* Y register is 32-bits length, but gdb takes care of that. */ | |
117 | 19 *8, /* y */ | |
118 | ||
119 | }; | |
120 | ||
121 | ||
122 | struct regs_range_t | |
123 | { | |
124 | int regno_start; | |
125 | int regno_end; | |
126 | }; | |
127 | ||
128 | static const struct regs_range_t gregs_ranges[] = { | |
129 | { 0, 31 }, /* g0 .. i7 */ | |
130 | { 80, 82 }, /* pc .. state */ | |
131 | { 84, 85 } /* fprs .. y */ | |
132 | }; | |
133 | ||
134 | #define N_GREGS_RANGES (sizeof (gregs_ranges) / sizeof (struct regs_range_t)) | |
135 | ||
136 | static const struct regs_range_t fpregs_ranges[] = { | |
137 | { 32, 79 }, /* f0 .. f62 */ | |
138 | { 83, 83 } /* fsr */ | |
139 | }; | |
140 | ||
141 | #define N_FPREGS_RANGES (sizeof (fpregs_ranges) / sizeof (struct regs_range_t)) | |
142 | ||
143 | /* Defined in auto-generated file reg-sparc64.c. */ | |
144 | void init_registers_sparc64 (void); | |
3aee8918 | 145 | extern const struct target_desc *tdesc_sparc64; |
dfb64f85 | 146 | |
daca57a7 TBA |
147 | bool |
148 | sparc_target::low_cannot_store_register (int regno) | |
dfb64f85 DJ |
149 | { |
150 | return (regno >= sparc_num_regs || sparc_regmap[regno] == -1); | |
151 | } | |
152 | ||
daca57a7 TBA |
153 | bool |
154 | sparc_target::low_cannot_fetch_register (int regno) | |
dfb64f85 DJ |
155 | { |
156 | return (regno >= sparc_num_regs || sparc_regmap[regno] == -1); | |
157 | } | |
158 | ||
159 | static void | |
442ea881 | 160 | sparc_fill_gregset_to_stack (struct regcache *regcache, const void *buf) |
dfb64f85 DJ |
161 | { |
162 | int i; | |
163 | CORE_ADDR addr = 0; | |
164 | unsigned char tmp_reg_buf[8]; | |
3aee8918 | 165 | const int l0_regno = find_regno (regcache->tdesc, "l0"); |
dfb64f85 DJ |
166 | const int i7_regno = l0_regno + 15; |
167 | ||
168 | /* These registers have to be stored in the stack. */ | |
111217b3 | 169 | memcpy (&addr, |
3aee8918 | 170 | ((char *) buf) + sparc_regmap[find_regno (regcache->tdesc, "sp")], |
111217b3 | 171 | sizeof (addr)); |
dfb64f85 DJ |
172 | |
173 | addr += BIAS; | |
1b3f6016 | 174 | |
dfb64f85 DJ |
175 | for (i = l0_regno; i <= i7_regno; i++) |
176 | { | |
442ea881 | 177 | collect_register (regcache, i, tmp_reg_buf); |
52405d85 | 178 | the_target->write_memory (addr, tmp_reg_buf, sizeof (tmp_reg_buf)); |
111217b3 | 179 | addr += sizeof (tmp_reg_buf); |
dfb64f85 DJ |
180 | } |
181 | } | |
182 | ||
183 | static void | |
442ea881 | 184 | sparc_fill_gregset (struct regcache *regcache, void *buf) |
dfb64f85 DJ |
185 | { |
186 | int i; | |
187 | int range; | |
1b3f6016 | 188 | |
dfb64f85 | 189 | for (range = 0; range < N_GREGS_RANGES; range++) |
493e2a69 MS |
190 | for (i = gregs_ranges[range].regno_start; |
191 | i <= gregs_ranges[range].regno_end; i++) | |
dfb64f85 | 192 | if (sparc_regmap[i] != -1) |
442ea881 | 193 | collect_register (regcache, i, ((char *) buf) + sparc_regmap[i]); |
1b3f6016 | 194 | |
442ea881 | 195 | sparc_fill_gregset_to_stack (regcache, buf); |
dfb64f85 DJ |
196 | } |
197 | ||
198 | static void | |
442ea881 | 199 | sparc_fill_fpregset (struct regcache *regcache, void *buf) |
dfb64f85 DJ |
200 | { |
201 | int i; | |
202 | int range; | |
1b3f6016 | 203 | |
dfb64f85 | 204 | for (range = 0; range < N_FPREGS_RANGES; range++) |
493e2a69 MS |
205 | for (i = fpregs_ranges[range].regno_start; |
206 | i <= fpregs_ranges[range].regno_end; i++) | |
442ea881 | 207 | collect_register (regcache, i, ((char *) buf) + sparc_regmap[i]); |
1b3f6016 | 208 | |
dfb64f85 DJ |
209 | } |
210 | ||
211 | static void | |
442ea881 | 212 | sparc_store_gregset_from_stack (struct regcache *regcache, const void *buf) |
dfb64f85 DJ |
213 | { |
214 | int i; | |
215 | CORE_ADDR addr = 0; | |
216 | unsigned char tmp_reg_buf[8]; | |
3aee8918 | 217 | const int l0_regno = find_regno (regcache->tdesc, "l0"); |
dfb64f85 DJ |
218 | const int i7_regno = l0_regno + 15; |
219 | ||
220 | /* These registers have to be obtained from the stack. */ | |
111217b3 | 221 | memcpy (&addr, |
3aee8918 | 222 | ((char *) buf) + sparc_regmap[find_regno (regcache->tdesc, "sp")], |
111217b3 | 223 | sizeof (addr)); |
dfb64f85 DJ |
224 | |
225 | addr += BIAS; | |
1b3f6016 | 226 | |
dfb64f85 DJ |
227 | for (i = l0_regno; i <= i7_regno; i++) |
228 | { | |
52405d85 | 229 | the_target->read_memory (addr, tmp_reg_buf, sizeof (tmp_reg_buf)); |
442ea881 | 230 | supply_register (regcache, i, tmp_reg_buf); |
111217b3 | 231 | addr += sizeof (tmp_reg_buf); |
dfb64f85 DJ |
232 | } |
233 | } | |
234 | ||
235 | static void | |
442ea881 | 236 | sparc_store_gregset (struct regcache *regcache, const void *buf) |
dfb64f85 DJ |
237 | { |
238 | int i; | |
239 | char zerobuf[8]; | |
240 | int range; | |
241 | ||
111217b3 | 242 | memset (zerobuf, 0, sizeof (zerobuf)); |
1b3f6016 | 243 | |
dfb64f85 | 244 | for (range = 0; range < N_GREGS_RANGES; range++) |
493e2a69 MS |
245 | for (i = gregs_ranges[range].regno_start; |
246 | i <= gregs_ranges[range].regno_end; i++) | |
dfb64f85 | 247 | if (sparc_regmap[i] != -1) |
442ea881 | 248 | supply_register (regcache, i, ((char *) buf) + sparc_regmap[i]); |
dfb64f85 | 249 | else |
442ea881 | 250 | supply_register (regcache, i, zerobuf); |
1b3f6016 | 251 | |
442ea881 | 252 | sparc_store_gregset_from_stack (regcache, buf); |
dfb64f85 DJ |
253 | } |
254 | ||
255 | static void | |
442ea881 | 256 | sparc_store_fpregset (struct regcache *regcache, const void *buf) |
dfb64f85 DJ |
257 | { |
258 | int i; | |
259 | int range; | |
1b3f6016 | 260 | |
dfb64f85 | 261 | for (range = 0; range < N_FPREGS_RANGES; range++) |
442ea881 PA |
262 | for (i = fpregs_ranges[range].regno_start; |
263 | i <= fpregs_ranges[range].regno_end; | |
264 | i++) | |
265 | supply_register (regcache, i, ((char *) buf) + sparc_regmap[i]); | |
dfb64f85 DJ |
266 | } |
267 | ||
dd373349 | 268 | static const gdb_byte sparc_breakpoint[INSN_SIZE] = { |
493e2a69 MS |
269 | 0x91, 0xd0, 0x20, 0x01 |
270 | }; | |
dfb64f85 DJ |
271 | #define sparc_breakpoint_len INSN_SIZE |
272 | ||
3ca4edb6 | 273 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
dd373349 | 274 | |
3ca4edb6 TBA |
275 | const gdb_byte * |
276 | sparc_target::sw_breakpoint_from_kind (int kind, int *size) | |
dd373349 AT |
277 | { |
278 | *size = sparc_breakpoint_len; | |
279 | return sparc_breakpoint; | |
280 | } | |
dfb64f85 | 281 | |
d7146cda TBA |
282 | bool |
283 | sparc_target::low_breakpoint_at (CORE_ADDR where) | |
dfb64f85 DJ |
284 | { |
285 | unsigned char insn[INSN_SIZE]; | |
286 | ||
d7146cda | 287 | read_memory (where, (unsigned char *) insn, sizeof (insn)); |
1b3f6016 | 288 | |
111217b3 | 289 | if (memcmp (sparc_breakpoint, insn, sizeof (insn)) == 0) |
d7146cda | 290 | return true; |
dfb64f85 | 291 | |
493e2a69 MS |
292 | /* If necessary, recognize more trap instructions here. GDB only |
293 | uses TRAP Always. */ | |
dfb64f85 | 294 | |
d7146cda | 295 | return false; |
dfb64f85 DJ |
296 | } |
297 | ||
797bcff5 TBA |
298 | void |
299 | sparc_target::low_arch_setup () | |
3aee8918 PA |
300 | { |
301 | current_process ()->tdesc = tdesc_sparc64; | |
302 | } | |
dfb64f85 | 303 | |
3aee8918 | 304 | static struct regset_info sparc_regsets[] = { |
1570b33e | 305 | { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t), |
dfb64f85 DJ |
306 | GENERAL_REGS, |
307 | sparc_fill_gregset, sparc_store_gregset }, | |
1570b33e | 308 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, sizeof (fpregset_t), |
dfb64f85 DJ |
309 | FP_REGS, |
310 | sparc_fill_fpregset, sparc_store_fpregset }, | |
50bc912a | 311 | NULL_REGSET |
dfb64f85 DJ |
312 | }; |
313 | ||
3aee8918 PA |
314 | static struct regsets_info sparc_regsets_info = |
315 | { | |
316 | sparc_regsets, /* regsets */ | |
317 | 0, /* num_regsets */ | |
318 | NULL, /* disabled_regsets */ | |
319 | }; | |
320 | ||
321 | static struct usrregs_info sparc_usrregs_info = | |
322 | { | |
323 | sparc_num_regs, | |
324 | /* No regmap needs to be provided since this impl. doesn't use | |
325 | USRREGS. */ | |
326 | NULL | |
327 | }; | |
328 | ||
aa8d21c9 | 329 | static struct regs_info myregs_info = |
3aee8918 PA |
330 | { |
331 | NULL, /* regset_bitmap */ | |
332 | &sparc_usrregs_info, | |
333 | &sparc_regsets_info | |
334 | }; | |
335 | ||
aa8d21c9 TBA |
336 | const regs_info * |
337 | sparc_target::get_regs_info () | |
3aee8918 | 338 | { |
aa8d21c9 | 339 | return &myregs_info; |
3aee8918 PA |
340 | } |
341 | ||
ef0478f6 TBA |
342 | /* The linux target ops object. */ |
343 | ||
344 | linux_process_target *the_linux_target = &the_sparc_target; | |
345 | ||
3aee8918 PA |
346 | void |
347 | initialize_low_arch (void) | |
348 | { | |
349 | /* Initialize the Linux target descriptions. */ | |
350 | init_registers_sparc64 (); | |
351 | ||
352 | initialize_regsets_info (&sparc_regsets_info); | |
353 | } |