Commit | Line | Data |
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265f716b DJ |
1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
2 | for GDB. | |
32d0add0 | 3 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
265f716b DJ |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
265f716b DJ |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
265f716b DJ |
19 | |
20 | /* This file is used for both 31-bit and 64-bit S/390 systems. */ | |
21 | ||
22 | #include "server.h" | |
23 | #include "linux-low.h" | |
c642a434 | 24 | #include "elf/common.h" |
265f716b DJ |
25 | |
26 | #include <asm/ptrace.h> | |
5826e159 | 27 | #include "nat/gdb_ptrace.h" |
c642a434 | 28 | #include <sys/uio.h> |
7803799a | 29 | #include <elf.h> |
265f716b | 30 | |
7803799a UW |
31 | #ifndef HWCAP_S390_HIGH_GPRS |
32 | #define HWCAP_S390_HIGH_GPRS 512 | |
33 | #endif | |
d05b4ac3 | 34 | |
6682d959 AA |
35 | #ifndef HWCAP_S390_TE |
36 | #define HWCAP_S390_TE 1024 | |
37 | #endif | |
38 | ||
bf2d68ab AA |
39 | #ifndef HWCAP_S390_VX |
40 | #define HWCAP_S390_VX 2048 | |
41 | #endif | |
42 | ||
7803799a UW |
43 | /* Defined in auto-generated file s390-linux32.c. */ |
44 | void init_registers_s390_linux32 (void); | |
3aee8918 PA |
45 | extern const struct target_desc *tdesc_s390_linux32; |
46 | ||
c642a434 UW |
47 | /* Defined in auto-generated file s390-linux32v1.c. */ |
48 | void init_registers_s390_linux32v1 (void); | |
3aee8918 PA |
49 | extern const struct target_desc *tdesc_s390_linux32v1; |
50 | ||
c642a434 UW |
51 | /* Defined in auto-generated file s390-linux32v2.c. */ |
52 | void init_registers_s390_linux32v2 (void); | |
3aee8918 PA |
53 | extern const struct target_desc *tdesc_s390_linux32v2; |
54 | ||
7803799a UW |
55 | /* Defined in auto-generated file s390-linux64.c. */ |
56 | void init_registers_s390_linux64 (void); | |
3aee8918 PA |
57 | extern const struct target_desc *tdesc_s390_linux64; |
58 | ||
c642a434 UW |
59 | /* Defined in auto-generated file s390-linux64v1.c. */ |
60 | void init_registers_s390_linux64v1 (void); | |
3aee8918 PA |
61 | extern const struct target_desc *tdesc_s390_linux64v1; |
62 | ||
c642a434 UW |
63 | /* Defined in auto-generated file s390-linux64v2.c. */ |
64 | void init_registers_s390_linux64v2 (void); | |
3aee8918 PA |
65 | extern const struct target_desc *tdesc_s390_linux64v2; |
66 | ||
4ac33720 UW |
67 | /* Defined in auto-generated file s390-te-linux64.c. */ |
68 | void init_registers_s390_te_linux64 (void); | |
69 | extern const struct target_desc *tdesc_s390_te_linux64; | |
70 | ||
bf2d68ab AA |
71 | /* Defined in auto-generated file s390-vx-linux64.c. */ |
72 | void init_registers_s390_vx_linux64 (void); | |
73 | extern const struct target_desc *tdesc_s390_vx_linux64; | |
74 | ||
75 | /* Defined in auto-generated file s390-tevx-linux64.c. */ | |
76 | void init_registers_s390_tevx_linux64 (void); | |
77 | extern const struct target_desc *tdesc_s390_tevx_linux64; | |
78 | ||
7803799a UW |
79 | /* Defined in auto-generated file s390x-linux64.c. */ |
80 | void init_registers_s390x_linux64 (void); | |
3aee8918 PA |
81 | extern const struct target_desc *tdesc_s390x_linux64; |
82 | ||
c642a434 UW |
83 | /* Defined in auto-generated file s390x-linux64v1.c. */ |
84 | void init_registers_s390x_linux64v1 (void); | |
3aee8918 PA |
85 | extern const struct target_desc *tdesc_s390x_linux64v1; |
86 | ||
c642a434 UW |
87 | /* Defined in auto-generated file s390x-linux64v2.c. */ |
88 | void init_registers_s390x_linux64v2 (void); | |
3aee8918 | 89 | extern const struct target_desc *tdesc_s390x_linux64v2; |
d05b4ac3 | 90 | |
4ac33720 UW |
91 | /* Defined in auto-generated file s390x-te-linux64.c. */ |
92 | void init_registers_s390x_te_linux64 (void); | |
93 | extern const struct target_desc *tdesc_s390x_te_linux64; | |
94 | ||
bf2d68ab AA |
95 | /* Defined in auto-generated file s390x-vx-linux64.c. */ |
96 | void init_registers_s390x_vx_linux64 (void); | |
97 | extern const struct target_desc *tdesc_s390x_vx_linux64; | |
98 | ||
99 | /* Defined in auto-generated file s390x-tevx-linux64.c. */ | |
100 | void init_registers_s390x_tevx_linux64 (void); | |
101 | extern const struct target_desc *tdesc_s390x_tevx_linux64; | |
102 | ||
c642a434 | 103 | #define s390_num_regs 52 |
265f716b | 104 | |
2ec06d2e | 105 | static int s390_regmap[] = { |
265f716b DJ |
106 | PT_PSWMASK, PT_PSWADDR, |
107 | ||
108 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, | |
109 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, | |
110 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, | |
111 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, | |
112 | ||
113 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
114 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
115 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
116 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
117 | ||
265f716b DJ |
118 | PT_FPC, |
119 | ||
d0f54f9d | 120 | #ifndef __s390x__ |
265f716b DJ |
121 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
122 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, | |
123 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, | |
124 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, | |
125 | #else | |
126 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
127 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
128 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
129 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
130 | #endif | |
c642a434 UW |
131 | |
132 | PT_ORIGGPR2, | |
265f716b DJ |
133 | }; |
134 | ||
7803799a | 135 | #ifdef __s390x__ |
c642a434 | 136 | #define s390_num_regs_3264 68 |
7803799a UW |
137 | |
138 | static int s390_regmap_3264[] = { | |
139 | PT_PSWMASK, PT_PSWADDR, | |
140 | ||
493e2a69 MS |
141 | PT_GPR0, PT_GPR0, PT_GPR1, PT_GPR1, |
142 | PT_GPR2, PT_GPR2, PT_GPR3, PT_GPR3, | |
143 | PT_GPR4, PT_GPR4, PT_GPR5, PT_GPR5, | |
144 | PT_GPR6, PT_GPR6, PT_GPR7, PT_GPR7, | |
145 | PT_GPR8, PT_GPR8, PT_GPR9, PT_GPR9, | |
146 | PT_GPR10, PT_GPR10, PT_GPR11, PT_GPR11, | |
147 | PT_GPR12, PT_GPR12, PT_GPR13, PT_GPR13, | |
148 | PT_GPR14, PT_GPR14, PT_GPR15, PT_GPR15, | |
7803799a UW |
149 | |
150 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
151 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
152 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
153 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
154 | ||
155 | PT_FPC, | |
156 | ||
157 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
158 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
159 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
160 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
c642a434 UW |
161 | |
162 | PT_ORIGGPR2, | |
7803799a UW |
163 | }; |
164 | #endif | |
165 | ||
166 | ||
2ec06d2e DJ |
167 | static int |
168 | s390_cannot_fetch_register (int regno) | |
265f716b | 169 | { |
265f716b DJ |
170 | return 0; |
171 | } | |
172 | ||
2ec06d2e DJ |
173 | static int |
174 | s390_cannot_store_register (int regno) | |
265f716b | 175 | { |
265f716b DJ |
176 | return 0; |
177 | } | |
2ec06d2e | 178 | |
ee1a7ae4 | 179 | static void |
442ea881 | 180 | s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf) |
ee1a7ae4 | 181 | { |
3aee8918 | 182 | int size = register_size (regcache->tdesc, regno); |
ee1a7ae4 UW |
183 | if (size < sizeof (long)) |
184 | { | |
3aee8918 PA |
185 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
186 | struct usrregs_info *usr = regs_info->usrregs; | |
187 | int regaddr = usr->regmap[regno]; | |
7803799a | 188 | |
ee1a7ae4 UW |
189 | memset (buf, 0, sizeof (long)); |
190 | ||
3aee8918 PA |
191 | if ((regno ^ 1) < usr->num_regs |
192 | && usr->regmap[regno ^ 1] == regaddr) | |
7803799a | 193 | { |
18f5de3b JK |
194 | collect_register (regcache, regno & ~1, buf); |
195 | collect_register (regcache, (regno & ~1) + 1, | |
196 | buf + sizeof (long) - size); | |
7803799a | 197 | } |
d6db1fab UW |
198 | else if (regaddr == PT_PSWMASK) |
199 | { | |
200 | /* Convert 4-byte PSW mask to 8 bytes by clearing bit 12 and copying | |
201 | the basic addressing mode bit from the PSW address. */ | |
3aee8918 | 202 | char *addr = alloca (register_size (regcache->tdesc, regno ^ 1)); |
d6db1fab UW |
203 | collect_register (regcache, regno, buf); |
204 | collect_register (regcache, regno ^ 1, addr); | |
205 | buf[1] &= ~0x8; | |
206 | buf[size] |= (addr[0] & 0x80); | |
207 | } | |
208 | else if (regaddr == PT_PSWADDR) | |
209 | { | |
210 | /* Convert 4-byte PSW address to 8 bytes by clearing the addressing | |
211 | mode bit (which gets copied to the PSW mask instead). */ | |
212 | collect_register (regcache, regno, buf + sizeof (long) - size); | |
213 | buf[sizeof (long) - size] &= ~0x80; | |
214 | } | |
c642a434 UW |
215 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
216 | || regaddr == PT_ORIGGPR2) | |
442ea881 | 217 | collect_register (regcache, regno, buf + sizeof (long) - size); |
ee1a7ae4 | 218 | else |
442ea881 | 219 | collect_register (regcache, regno, buf); |
ee1a7ae4 UW |
220 | } |
221 | else | |
18f5de3b | 222 | collect_register (regcache, regno, buf); |
ee1a7ae4 UW |
223 | } |
224 | ||
225 | static void | |
493e2a69 MS |
226 | s390_supply_ptrace_register (struct regcache *regcache, |
227 | int regno, const char *buf) | |
ee1a7ae4 | 228 | { |
3aee8918 | 229 | int size = register_size (regcache->tdesc, regno); |
ee1a7ae4 UW |
230 | if (size < sizeof (long)) |
231 | { | |
3aee8918 PA |
232 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
233 | struct usrregs_info *usr = regs_info->usrregs; | |
234 | int regaddr = usr->regmap[regno]; | |
7803799a | 235 | |
3aee8918 PA |
236 | if ((regno ^ 1) < usr->num_regs |
237 | && usr->regmap[regno ^ 1] == regaddr) | |
7803799a | 238 | { |
18f5de3b JK |
239 | supply_register (regcache, regno & ~1, buf); |
240 | supply_register (regcache, (regno & ~1) + 1, | |
241 | buf + sizeof (long) - size); | |
7803799a | 242 | } |
d6db1fab UW |
243 | else if (regaddr == PT_PSWMASK) |
244 | { | |
245 | /* Convert 8-byte PSW mask to 4 bytes by setting bit 12 and copying | |
246 | the basic addressing mode into the PSW address. */ | |
247 | char *mask = alloca (size); | |
3aee8918 | 248 | char *addr = alloca (register_size (regcache->tdesc, regno ^ 1)); |
d6db1fab UW |
249 | memcpy (mask, buf, size); |
250 | mask[1] |= 0x8; | |
251 | supply_register (regcache, regno, mask); | |
252 | ||
253 | collect_register (regcache, regno ^ 1, addr); | |
254 | addr[0] &= ~0x80; | |
255 | addr[0] |= (buf[size] & 0x80); | |
256 | supply_register (regcache, regno ^ 1, addr); | |
257 | } | |
258 | else if (regaddr == PT_PSWADDR) | |
259 | { | |
260 | /* Convert 8-byte PSW address to 4 bytes by truncating, but | |
261 | keeping the addressing mode bit (which was set from the mask). */ | |
262 | char *addr = alloca (size); | |
263 | char amode; | |
264 | collect_register (regcache, regno, addr); | |
265 | amode = addr[0] & 0x80; | |
266 | memcpy (addr, buf + sizeof (long) - size, size); | |
267 | addr[0] &= ~0x80; | |
268 | addr[0] |= amode; | |
269 | supply_register (regcache, regno, addr); | |
270 | } | |
c642a434 UW |
271 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
272 | || regaddr == PT_ORIGGPR2) | |
442ea881 | 273 | supply_register (regcache, regno, buf + sizeof (long) - size); |
ee1a7ae4 | 274 | else |
442ea881 | 275 | supply_register (regcache, regno, buf); |
ee1a7ae4 UW |
276 | } |
277 | else | |
442ea881 | 278 | supply_register (regcache, regno, buf); |
ee1a7ae4 UW |
279 | } |
280 | ||
b7149293 UW |
281 | /* Provide only a fill function for the general register set. ps_lgetregs |
282 | will use this for NPTL support. */ | |
283 | ||
3aee8918 PA |
284 | static void |
285 | s390_fill_gregset (struct regcache *regcache, void *buf) | |
b7149293 UW |
286 | { |
287 | int i; | |
3aee8918 PA |
288 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
289 | struct usrregs_info *usr = regs_info->usrregs; | |
b7149293 | 290 | |
3aee8918 | 291 | for (i = 0; i < usr->num_regs; i++) |
7803799a | 292 | { |
3aee8918 PA |
293 | if (usr->regmap[i] < PT_PSWMASK |
294 | || usr->regmap[i] > PT_ACR15) | |
7803799a UW |
295 | continue; |
296 | ||
3aee8918 PA |
297 | s390_collect_ptrace_register (regcache, i, |
298 | (char *) buf + usr->regmap[i]); | |
7803799a | 299 | } |
b7149293 UW |
300 | } |
301 | ||
c642a434 UW |
302 | /* Fill and store functions for extended register sets. */ |
303 | ||
c642a434 UW |
304 | static void |
305 | s390_store_last_break (struct regcache *regcache, const void *buf) | |
306 | { | |
3aee8918 PA |
307 | const char *p; |
308 | ||
309 | p = (const char *) buf + 8 - register_size (regcache->tdesc, 0); | |
310 | supply_register_by_name (regcache, "last_break", p); | |
c642a434 UW |
311 | } |
312 | ||
313 | static void | |
314 | s390_fill_system_call (struct regcache *regcache, void *buf) | |
315 | { | |
316 | collect_register_by_name (regcache, "system_call", buf); | |
317 | } | |
318 | ||
319 | static void | |
320 | s390_store_system_call (struct regcache *regcache, const void *buf) | |
321 | { | |
322 | supply_register_by_name (regcache, "system_call", buf); | |
323 | } | |
324 | ||
e5a9158d AA |
325 | static void |
326 | s390_store_tdb (struct regcache *regcache, const void *buf) | |
327 | { | |
328 | int tdb0 = find_regno (regcache->tdesc, "tdb0"); | |
329 | int tr0 = find_regno (regcache->tdesc, "tr0"); | |
330 | int i; | |
331 | ||
332 | for (i = 0; i < 4; i++) | |
333 | supply_register (regcache, tdb0 + i, (const char *) buf + 8 * i); | |
334 | ||
335 | for (i = 0; i < 16; i++) | |
336 | supply_register (regcache, tr0 + i, (const char *) buf + 8 * (16 + i)); | |
337 | } | |
338 | ||
bf2d68ab AA |
339 | static void |
340 | s390_fill_vxrs_low (struct regcache *regcache, void *buf) | |
341 | { | |
342 | int v0 = find_regno (regcache->tdesc, "v0l"); | |
343 | int i; | |
344 | ||
345 | for (i = 0; i < 16; i++) | |
346 | collect_register (regcache, v0 + i, (char *) buf + 8 * i); | |
347 | } | |
348 | ||
349 | static void | |
350 | s390_store_vxrs_low (struct regcache *regcache, const void *buf) | |
351 | { | |
352 | int v0 = find_regno (regcache->tdesc, "v0l"); | |
353 | int i; | |
354 | ||
355 | for (i = 0; i < 16; i++) | |
356 | supply_register (regcache, v0 + i, (const char *) buf + 8 * i); | |
357 | } | |
358 | ||
359 | static void | |
360 | s390_fill_vxrs_high (struct regcache *regcache, void *buf) | |
361 | { | |
362 | int v16 = find_regno (regcache->tdesc, "v16"); | |
363 | int i; | |
364 | ||
365 | for (i = 0; i < 16; i++) | |
366 | collect_register (regcache, v16 + i, (char *) buf + 16 * i); | |
367 | } | |
368 | ||
369 | static void | |
370 | s390_store_vxrs_high (struct regcache *regcache, const void *buf) | |
371 | { | |
372 | int v16 = find_regno (regcache->tdesc, "v16"); | |
373 | int i; | |
374 | ||
375 | for (i = 0; i < 16; i++) | |
376 | supply_register (regcache, v16 + i, (const char *) buf + 16 * i); | |
377 | } | |
378 | ||
3aee8918 | 379 | static struct regset_info s390_regsets[] = { |
1570b33e | 380 | { 0, 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL }, |
feea5f36 AA |
381 | /* Last break address is read-only; no fill function. */ |
382 | { PTRACE_GETREGSET, -1, NT_S390_LAST_BREAK, 0, EXTENDED_REGS, | |
383 | NULL, s390_store_last_break }, | |
c642a434 UW |
384 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_SYSTEM_CALL, 0, |
385 | EXTENDED_REGS, s390_fill_system_call, s390_store_system_call }, | |
e5a9158d AA |
386 | /* TDB is read-only. */ |
387 | { PTRACE_GETREGSET, -1, NT_S390_TDB, 0, EXTENDED_REGS, | |
388 | NULL, s390_store_tdb }, | |
bf2d68ab AA |
389 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_LOW, 0, |
390 | EXTENDED_REGS, s390_fill_vxrs_low, s390_store_vxrs_low }, | |
391 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_HIGH, 0, | |
392 | EXTENDED_REGS, s390_fill_vxrs_high, s390_store_vxrs_high }, | |
1570b33e | 393 | { 0, 0, 0, -1, -1, NULL, NULL } |
b7149293 UW |
394 | }; |
395 | ||
b0ded00b | 396 | |
f450004a | 397 | static const unsigned char s390_breakpoint[] = { 0, 1 }; |
b0ded00b UW |
398 | #define s390_breakpoint_len 2 |
399 | ||
400 | static CORE_ADDR | |
442ea881 | 401 | s390_get_pc (struct regcache *regcache) |
b0ded00b | 402 | { |
3aee8918 | 403 | if (register_size (regcache->tdesc, 0) == 4) |
d61ddec4 | 404 | { |
d6db1fab UW |
405 | unsigned int pswa; |
406 | collect_register_by_name (regcache, "pswa", &pswa); | |
407 | return pswa & 0x7fffffff; | |
d61ddec4 UW |
408 | } |
409 | else | |
410 | { | |
411 | unsigned long pc; | |
442ea881 | 412 | collect_register_by_name (regcache, "pswa", &pc); |
d61ddec4 UW |
413 | return pc; |
414 | } | |
b0ded00b UW |
415 | } |
416 | ||
417 | static void | |
442ea881 | 418 | s390_set_pc (struct regcache *regcache, CORE_ADDR newpc) |
b0ded00b | 419 | { |
3aee8918 | 420 | if (register_size (regcache->tdesc, 0) == 4) |
d61ddec4 | 421 | { |
d6db1fab UW |
422 | unsigned int pswa; |
423 | collect_register_by_name (regcache, "pswa", &pswa); | |
424 | pswa = (pswa & 0x80000000) | (newpc & 0x7fffffff); | |
425 | supply_register_by_name (regcache, "pswa", &pswa); | |
d61ddec4 UW |
426 | } |
427 | else | |
428 | { | |
429 | unsigned long pc = newpc; | |
442ea881 | 430 | supply_register_by_name (regcache, "pswa", &pc); |
d61ddec4 | 431 | } |
b0ded00b UW |
432 | } |
433 | ||
7803799a UW |
434 | #ifdef __s390x__ |
435 | static unsigned long | |
3aee8918 | 436 | s390_get_hwcap (const struct target_desc *tdesc) |
7803799a | 437 | { |
3aee8918 | 438 | int wordsize = register_size (tdesc, 0); |
7803799a UW |
439 | unsigned char *data = alloca (2 * wordsize); |
440 | int offset = 0; | |
441 | ||
442 | while ((*the_target->read_auxv) (offset, data, 2 * wordsize) == 2 * wordsize) | |
443 | { | |
444 | if (wordsize == 4) | |
445 | { | |
446 | unsigned int *data_p = (unsigned int *)data; | |
447 | if (data_p[0] == AT_HWCAP) | |
448 | return data_p[1]; | |
449 | } | |
450 | else | |
451 | { | |
452 | unsigned long *data_p = (unsigned long *)data; | |
453 | if (data_p[0] == AT_HWCAP) | |
454 | return data_p[1]; | |
455 | } | |
456 | ||
457 | offset += 2 * wordsize; | |
458 | } | |
459 | ||
460 | return 0; | |
461 | } | |
462 | #endif | |
d61ddec4 | 463 | |
c642a434 UW |
464 | static int |
465 | s390_check_regset (int pid, int regset, int regsize) | |
466 | { | |
467 | gdb_byte *buf = alloca (regsize); | |
468 | struct iovec iov; | |
469 | ||
470 | iov.iov_base = buf; | |
471 | iov.iov_len = regsize; | |
472 | ||
4ac33720 UW |
473 | if (ptrace (PTRACE_GETREGSET, pid, (long) regset, (long) &iov) >= 0 |
474 | || errno == ENODATA) | |
c642a434 | 475 | return 1; |
4ac33720 | 476 | return 0; |
c642a434 UW |
477 | } |
478 | ||
3aee8918 PA |
479 | #ifdef __s390x__ |
480 | /* For a 31-bit inferior, whether the kernel supports using the full | |
481 | 64-bit GPRs. */ | |
482 | static int have_hwcap_s390_high_gprs = 0; | |
483 | #endif | |
484 | ||
d61ddec4 UW |
485 | static void |
486 | s390_arch_setup (void) | |
487 | { | |
3aee8918 | 488 | const struct target_desc *tdesc; |
c642a434 UW |
489 | struct regset_info *regset; |
490 | ||
491 | /* Check whether the kernel supports extra register sets. */ | |
0bfdf32f | 492 | int pid = pid_of (current_thread); |
c642a434 UW |
493 | int have_regset_last_break |
494 | = s390_check_regset (pid, NT_S390_LAST_BREAK, 8); | |
495 | int have_regset_system_call | |
496 | = s390_check_regset (pid, NT_S390_SYSTEM_CALL, 4); | |
4ac33720 | 497 | int have_regset_tdb = s390_check_regset (pid, NT_S390_TDB, 256); |
bf2d68ab AA |
498 | int have_regset_vxrs = s390_check_regset (pid, NT_S390_VXRS_LOW, 128) |
499 | && s390_check_regset (pid, NT_S390_VXRS_HIGH, 256); | |
c642a434 | 500 | |
d61ddec4 | 501 | /* Assume 31-bit inferior process. */ |
c642a434 | 502 | if (have_regset_system_call) |
3aee8918 | 503 | tdesc = tdesc_s390_linux32v2; |
c642a434 | 504 | else if (have_regset_last_break) |
3aee8918 | 505 | tdesc = tdesc_s390_linux32v1; |
c642a434 | 506 | else |
3aee8918 | 507 | tdesc = tdesc_s390_linux32; |
d61ddec4 UW |
508 | |
509 | /* On a 64-bit host, check the low bit of the (31-bit) PSWM | |
510 | -- if this is one, we actually have a 64-bit inferior. */ | |
511 | #ifdef __s390x__ | |
512 | { | |
513 | unsigned int pswm; | |
3aee8918 | 514 | struct regcache *regcache = new_register_cache (tdesc); |
6682d959 | 515 | |
3aee8918 | 516 | fetch_inferior_registers (regcache, find_regno (tdesc, "pswm")); |
442ea881 | 517 | collect_register_by_name (regcache, "pswm", &pswm); |
92b72907 UW |
518 | free_register_cache (regcache); |
519 | ||
d61ddec4 | 520 | if (pswm & 1) |
c642a434 | 521 | { |
6682d959 AA |
522 | if (have_regset_tdb) |
523 | have_regset_tdb = | |
524 | (s390_get_hwcap (tdesc_s390x_linux64v2) & HWCAP_S390_TE) != 0; | |
bf2d68ab AA |
525 | if (have_regset_vxrs) |
526 | have_regset_vxrs = | |
527 | (s390_get_hwcap (tdesc_s390x_linux64v2) & HWCAP_S390_VX) != 0; | |
528 | ||
529 | if (have_regset_vxrs) | |
530 | tdesc = (have_regset_tdb ? tdesc_s390x_tevx_linux64 : | |
531 | tdesc_s390x_vx_linux64); | |
532 | else if (have_regset_tdb) | |
4ac33720 | 533 | tdesc = tdesc_s390x_te_linux64; |
6682d959 | 534 | else if (have_regset_system_call) |
3aee8918 | 535 | tdesc = tdesc_s390x_linux64v2; |
c642a434 | 536 | else if (have_regset_last_break) |
3aee8918 | 537 | tdesc = tdesc_s390x_linux64v1; |
c642a434 | 538 | else |
3aee8918 | 539 | tdesc = tdesc_s390x_linux64; |
c642a434 | 540 | } |
7803799a UW |
541 | |
542 | /* For a 31-bit inferior, check whether the kernel supports | |
543 | using the full 64-bit GPRs. */ | |
3aee8918 | 544 | else if (s390_get_hwcap (tdesc) & HWCAP_S390_HIGH_GPRS) |
7803799a | 545 | { |
3aee8918 | 546 | have_hwcap_s390_high_gprs = 1; |
6682d959 AA |
547 | if (have_regset_tdb) |
548 | have_regset_tdb = (s390_get_hwcap (tdesc) & HWCAP_S390_TE) != 0; | |
bf2d68ab AA |
549 | if (have_regset_vxrs) |
550 | have_regset_vxrs = (s390_get_hwcap (tdesc) & HWCAP_S390_VX) != 0; | |
3aee8918 | 551 | |
bf2d68ab AA |
552 | if (have_regset_vxrs) |
553 | tdesc = (have_regset_tdb ? tdesc_s390_tevx_linux64 : | |
554 | tdesc_s390_vx_linux64); | |
555 | else if (have_regset_tdb) | |
4ac33720 UW |
556 | tdesc = tdesc_s390_te_linux64; |
557 | else if (have_regset_system_call) | |
3aee8918 | 558 | tdesc = tdesc_s390_linux64v2; |
c642a434 | 559 | else if (have_regset_last_break) |
3aee8918 | 560 | tdesc = tdesc_s390_linux64v1; |
c642a434 | 561 | else |
3aee8918 | 562 | tdesc = tdesc_s390_linux64; |
7803799a | 563 | } |
d61ddec4 UW |
564 | } |
565 | #endif | |
6682d959 AA |
566 | |
567 | /* Update target_regsets according to available register sets. */ | |
feea5f36 | 568 | for (regset = s390_regsets; regset->size >= 0; regset++) |
6682d959 AA |
569 | if (regset->get_request == PTRACE_GETREGSET) |
570 | switch (regset->nt_type) | |
571 | { | |
572 | case NT_S390_LAST_BREAK: | |
573 | regset->size = have_regset_last_break? 8 : 0; | |
574 | break; | |
575 | case NT_S390_SYSTEM_CALL: | |
576 | regset->size = have_regset_system_call? 4 : 0; | |
577 | break; | |
578 | case NT_S390_TDB: | |
579 | regset->size = have_regset_tdb ? 256 : 0; | |
bf2d68ab AA |
580 | break; |
581 | case NT_S390_VXRS_LOW: | |
582 | regset->size = have_regset_vxrs ? 128 : 0; | |
583 | break; | |
584 | case NT_S390_VXRS_HIGH: | |
585 | regset->size = have_regset_vxrs ? 256 : 0; | |
586 | break; | |
6682d959 AA |
587 | default: |
588 | break; | |
589 | } | |
590 | ||
3aee8918 | 591 | current_process ()->tdesc = tdesc; |
d61ddec4 UW |
592 | } |
593 | ||
594 | ||
b0ded00b UW |
595 | static int |
596 | s390_breakpoint_at (CORE_ADDR pc) | |
597 | { | |
598 | unsigned char c[s390_breakpoint_len]; | |
599 | read_inferior_memory (pc, c, s390_breakpoint_len); | |
600 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; | |
601 | } | |
602 | ||
3aee8918 PA |
603 | static struct usrregs_info s390_usrregs_info = |
604 | { | |
605 | s390_num_regs, | |
606 | s390_regmap, | |
607 | }; | |
608 | ||
609 | static struct regsets_info s390_regsets_info = | |
610 | { | |
611 | s390_regsets, /* regsets */ | |
612 | 0, /* num_regsets */ | |
613 | NULL, /* disabled_regsets */ | |
614 | }; | |
615 | ||
616 | static struct regs_info regs_info = | |
617 | { | |
618 | NULL, /* regset_bitmap */ | |
619 | &s390_usrregs_info, | |
620 | &s390_regsets_info | |
621 | }; | |
622 | ||
623 | #ifdef __s390x__ | |
624 | static struct usrregs_info s390_usrregs_info_3264 = | |
625 | { | |
626 | s390_num_regs_3264, | |
627 | s390_regmap_3264 | |
628 | }; | |
629 | ||
630 | static struct regsets_info s390_regsets_info_3264 = | |
631 | { | |
632 | s390_regsets, /* regsets */ | |
633 | 0, /* num_regsets */ | |
634 | NULL, /* disabled_regsets */ | |
635 | }; | |
636 | ||
637 | static struct regs_info regs_info_3264 = | |
638 | { | |
639 | NULL, /* regset_bitmap */ | |
640 | &s390_usrregs_info_3264, | |
641 | &s390_regsets_info_3264 | |
642 | }; | |
643 | #endif | |
644 | ||
645 | static const struct regs_info * | |
646 | s390_regs_info (void) | |
647 | { | |
648 | #ifdef __s390x__ | |
649 | if (have_hwcap_s390_high_gprs) | |
650 | { | |
651 | const struct target_desc *tdesc = current_process ()->tdesc; | |
652 | ||
653 | if (register_size (tdesc, 0) == 4) | |
654 | return ®s_info_3264; | |
655 | } | |
656 | #endif | |
657 | return ®s_info; | |
658 | } | |
b0ded00b | 659 | |
2ec06d2e | 660 | struct linux_target_ops the_low_target = { |
d61ddec4 | 661 | s390_arch_setup, |
3aee8918 | 662 | s390_regs_info, |
2ec06d2e DJ |
663 | s390_cannot_fetch_register, |
664 | s390_cannot_store_register, | |
c14dfd32 | 665 | NULL, /* fetch_register */ |
b0ded00b UW |
666 | s390_get_pc, |
667 | s390_set_pc, | |
668 | s390_breakpoint, | |
669 | s390_breakpoint_len, | |
670 | NULL, | |
671 | s390_breakpoint_len, | |
672 | s390_breakpoint_at, | |
802e8e6d | 673 | NULL, /* supports_z_point_type */ |
ee1a7ae4 UW |
674 | NULL, |
675 | NULL, | |
676 | NULL, | |
677 | NULL, | |
678 | s390_collect_ptrace_register, | |
679 | s390_supply_ptrace_register, | |
2ec06d2e | 680 | }; |
3aee8918 PA |
681 | |
682 | void | |
683 | initialize_low_arch (void) | |
684 | { | |
685 | /* Initialize the Linux target descriptions. */ | |
686 | ||
687 | init_registers_s390_linux32 (); | |
688 | init_registers_s390_linux32v1 (); | |
689 | init_registers_s390_linux32v2 (); | |
690 | init_registers_s390_linux64 (); | |
691 | init_registers_s390_linux64v1 (); | |
692 | init_registers_s390_linux64v2 (); | |
4ac33720 | 693 | init_registers_s390_te_linux64 (); |
bf2d68ab AA |
694 | init_registers_s390_vx_linux64 (); |
695 | init_registers_s390_tevx_linux64 (); | |
3aee8918 PA |
696 | init_registers_s390x_linux64 (); |
697 | init_registers_s390x_linux64v1 (); | |
698 | init_registers_s390x_linux64v2 (); | |
4ac33720 | 699 | init_registers_s390x_te_linux64 (); |
bf2d68ab AA |
700 | init_registers_s390x_vx_linux64 (); |
701 | init_registers_s390x_tevx_linux64 (); | |
3aee8918 PA |
702 | |
703 | initialize_regsets_info (&s390_regsets_info); | |
704 | #ifdef __s390x__ | |
705 | initialize_regsets_info (&s390_regsets_info_3264); | |
706 | #endif | |
707 | } |