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> | |
c642a434 UW |
27 | #include <sys/ptrace.h> |
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 | ||
c642a434 UW |
43 | #ifndef PTRACE_GETREGSET |
44 | #define PTRACE_GETREGSET 0x4204 | |
45 | #endif | |
46 | ||
47 | #ifndef PTRACE_SETREGSET | |
48 | #define PTRACE_SETREGSET 0x4205 | |
49 | #endif | |
50 | ||
7803799a UW |
51 | /* Defined in auto-generated file s390-linux32.c. */ |
52 | void init_registers_s390_linux32 (void); | |
3aee8918 PA |
53 | extern const struct target_desc *tdesc_s390_linux32; |
54 | ||
c642a434 UW |
55 | /* Defined in auto-generated file s390-linux32v1.c. */ |
56 | void init_registers_s390_linux32v1 (void); | |
3aee8918 PA |
57 | extern const struct target_desc *tdesc_s390_linux32v1; |
58 | ||
c642a434 UW |
59 | /* Defined in auto-generated file s390-linux32v2.c. */ |
60 | void init_registers_s390_linux32v2 (void); | |
3aee8918 PA |
61 | extern const struct target_desc *tdesc_s390_linux32v2; |
62 | ||
7803799a UW |
63 | /* Defined in auto-generated file s390-linux64.c. */ |
64 | void init_registers_s390_linux64 (void); | |
3aee8918 PA |
65 | extern const struct target_desc *tdesc_s390_linux64; |
66 | ||
c642a434 UW |
67 | /* Defined in auto-generated file s390-linux64v1.c. */ |
68 | void init_registers_s390_linux64v1 (void); | |
3aee8918 PA |
69 | extern const struct target_desc *tdesc_s390_linux64v1; |
70 | ||
c642a434 UW |
71 | /* Defined in auto-generated file s390-linux64v2.c. */ |
72 | void init_registers_s390_linux64v2 (void); | |
3aee8918 PA |
73 | extern const struct target_desc *tdesc_s390_linux64v2; |
74 | ||
4ac33720 UW |
75 | /* Defined in auto-generated file s390-te-linux64.c. */ |
76 | void init_registers_s390_te_linux64 (void); | |
77 | extern const struct target_desc *tdesc_s390_te_linux64; | |
78 | ||
bf2d68ab AA |
79 | /* Defined in auto-generated file s390-vx-linux64.c. */ |
80 | void init_registers_s390_vx_linux64 (void); | |
81 | extern const struct target_desc *tdesc_s390_vx_linux64; | |
82 | ||
83 | /* Defined in auto-generated file s390-tevx-linux64.c. */ | |
84 | void init_registers_s390_tevx_linux64 (void); | |
85 | extern const struct target_desc *tdesc_s390_tevx_linux64; | |
86 | ||
7803799a UW |
87 | /* Defined in auto-generated file s390x-linux64.c. */ |
88 | void init_registers_s390x_linux64 (void); | |
3aee8918 PA |
89 | extern const struct target_desc *tdesc_s390x_linux64; |
90 | ||
c642a434 UW |
91 | /* Defined in auto-generated file s390x-linux64v1.c. */ |
92 | void init_registers_s390x_linux64v1 (void); | |
3aee8918 PA |
93 | extern const struct target_desc *tdesc_s390x_linux64v1; |
94 | ||
c642a434 UW |
95 | /* Defined in auto-generated file s390x-linux64v2.c. */ |
96 | void init_registers_s390x_linux64v2 (void); | |
3aee8918 | 97 | extern const struct target_desc *tdesc_s390x_linux64v2; |
d05b4ac3 | 98 | |
4ac33720 UW |
99 | /* Defined in auto-generated file s390x-te-linux64.c. */ |
100 | void init_registers_s390x_te_linux64 (void); | |
101 | extern const struct target_desc *tdesc_s390x_te_linux64; | |
102 | ||
bf2d68ab AA |
103 | /* Defined in auto-generated file s390x-vx-linux64.c. */ |
104 | void init_registers_s390x_vx_linux64 (void); | |
105 | extern const struct target_desc *tdesc_s390x_vx_linux64; | |
106 | ||
107 | /* Defined in auto-generated file s390x-tevx-linux64.c. */ | |
108 | void init_registers_s390x_tevx_linux64 (void); | |
109 | extern const struct target_desc *tdesc_s390x_tevx_linux64; | |
110 | ||
c642a434 | 111 | #define s390_num_regs 52 |
265f716b | 112 | |
2ec06d2e | 113 | static int s390_regmap[] = { |
265f716b DJ |
114 | PT_PSWMASK, PT_PSWADDR, |
115 | ||
116 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, | |
117 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, | |
118 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, | |
119 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, | |
120 | ||
121 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
122 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
123 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
124 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
125 | ||
265f716b DJ |
126 | PT_FPC, |
127 | ||
d0f54f9d | 128 | #ifndef __s390x__ |
265f716b DJ |
129 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
130 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, | |
131 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, | |
132 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, | |
133 | #else | |
134 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
135 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
136 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
137 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
138 | #endif | |
c642a434 UW |
139 | |
140 | PT_ORIGGPR2, | |
265f716b DJ |
141 | }; |
142 | ||
7803799a | 143 | #ifdef __s390x__ |
c642a434 | 144 | #define s390_num_regs_3264 68 |
7803799a UW |
145 | |
146 | static int s390_regmap_3264[] = { | |
147 | PT_PSWMASK, PT_PSWADDR, | |
148 | ||
493e2a69 MS |
149 | PT_GPR0, PT_GPR0, PT_GPR1, PT_GPR1, |
150 | PT_GPR2, PT_GPR2, PT_GPR3, PT_GPR3, | |
151 | PT_GPR4, PT_GPR4, PT_GPR5, PT_GPR5, | |
152 | PT_GPR6, PT_GPR6, PT_GPR7, PT_GPR7, | |
153 | PT_GPR8, PT_GPR8, PT_GPR9, PT_GPR9, | |
154 | PT_GPR10, PT_GPR10, PT_GPR11, PT_GPR11, | |
155 | PT_GPR12, PT_GPR12, PT_GPR13, PT_GPR13, | |
156 | PT_GPR14, PT_GPR14, PT_GPR15, PT_GPR15, | |
7803799a UW |
157 | |
158 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
159 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
160 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
161 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
162 | ||
163 | PT_FPC, | |
164 | ||
165 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
166 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
167 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
168 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
c642a434 UW |
169 | |
170 | PT_ORIGGPR2, | |
7803799a UW |
171 | }; |
172 | #endif | |
173 | ||
174 | ||
2ec06d2e DJ |
175 | static int |
176 | s390_cannot_fetch_register (int regno) | |
265f716b | 177 | { |
265f716b DJ |
178 | return 0; |
179 | } | |
180 | ||
2ec06d2e DJ |
181 | static int |
182 | s390_cannot_store_register (int regno) | |
265f716b | 183 | { |
265f716b DJ |
184 | return 0; |
185 | } | |
2ec06d2e | 186 | |
ee1a7ae4 | 187 | static void |
442ea881 | 188 | s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf) |
ee1a7ae4 | 189 | { |
3aee8918 | 190 | int size = register_size (regcache->tdesc, regno); |
ee1a7ae4 UW |
191 | if (size < sizeof (long)) |
192 | { | |
3aee8918 PA |
193 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
194 | struct usrregs_info *usr = regs_info->usrregs; | |
195 | int regaddr = usr->regmap[regno]; | |
7803799a | 196 | |
ee1a7ae4 UW |
197 | memset (buf, 0, sizeof (long)); |
198 | ||
3aee8918 PA |
199 | if ((regno ^ 1) < usr->num_regs |
200 | && usr->regmap[regno ^ 1] == regaddr) | |
7803799a | 201 | { |
18f5de3b JK |
202 | collect_register (regcache, regno & ~1, buf); |
203 | collect_register (regcache, (regno & ~1) + 1, | |
204 | buf + sizeof (long) - size); | |
7803799a | 205 | } |
d6db1fab UW |
206 | else if (regaddr == PT_PSWMASK) |
207 | { | |
208 | /* Convert 4-byte PSW mask to 8 bytes by clearing bit 12 and copying | |
209 | the basic addressing mode bit from the PSW address. */ | |
3aee8918 | 210 | char *addr = alloca (register_size (regcache->tdesc, regno ^ 1)); |
d6db1fab UW |
211 | collect_register (regcache, regno, buf); |
212 | collect_register (regcache, regno ^ 1, addr); | |
213 | buf[1] &= ~0x8; | |
214 | buf[size] |= (addr[0] & 0x80); | |
215 | } | |
216 | else if (regaddr == PT_PSWADDR) | |
217 | { | |
218 | /* Convert 4-byte PSW address to 8 bytes by clearing the addressing | |
219 | mode bit (which gets copied to the PSW mask instead). */ | |
220 | collect_register (regcache, regno, buf + sizeof (long) - size); | |
221 | buf[sizeof (long) - size] &= ~0x80; | |
222 | } | |
c642a434 UW |
223 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
224 | || regaddr == PT_ORIGGPR2) | |
442ea881 | 225 | collect_register (regcache, regno, buf + sizeof (long) - size); |
ee1a7ae4 | 226 | else |
442ea881 | 227 | collect_register (regcache, regno, buf); |
ee1a7ae4 UW |
228 | } |
229 | else | |
18f5de3b | 230 | collect_register (regcache, regno, buf); |
ee1a7ae4 UW |
231 | } |
232 | ||
233 | static void | |
493e2a69 MS |
234 | s390_supply_ptrace_register (struct regcache *regcache, |
235 | int regno, const char *buf) | |
ee1a7ae4 | 236 | { |
3aee8918 | 237 | int size = register_size (regcache->tdesc, regno); |
ee1a7ae4 UW |
238 | if (size < sizeof (long)) |
239 | { | |
3aee8918 PA |
240 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
241 | struct usrregs_info *usr = regs_info->usrregs; | |
242 | int regaddr = usr->regmap[regno]; | |
7803799a | 243 | |
3aee8918 PA |
244 | if ((regno ^ 1) < usr->num_regs |
245 | && usr->regmap[regno ^ 1] == regaddr) | |
7803799a | 246 | { |
18f5de3b JK |
247 | supply_register (regcache, regno & ~1, buf); |
248 | supply_register (regcache, (regno & ~1) + 1, | |
249 | buf + sizeof (long) - size); | |
7803799a | 250 | } |
d6db1fab UW |
251 | else if (regaddr == PT_PSWMASK) |
252 | { | |
253 | /* Convert 8-byte PSW mask to 4 bytes by setting bit 12 and copying | |
254 | the basic addressing mode into the PSW address. */ | |
255 | char *mask = alloca (size); | |
3aee8918 | 256 | char *addr = alloca (register_size (regcache->tdesc, regno ^ 1)); |
d6db1fab UW |
257 | memcpy (mask, buf, size); |
258 | mask[1] |= 0x8; | |
259 | supply_register (regcache, regno, mask); | |
260 | ||
261 | collect_register (regcache, regno ^ 1, addr); | |
262 | addr[0] &= ~0x80; | |
263 | addr[0] |= (buf[size] & 0x80); | |
264 | supply_register (regcache, regno ^ 1, addr); | |
265 | } | |
266 | else if (regaddr == PT_PSWADDR) | |
267 | { | |
268 | /* Convert 8-byte PSW address to 4 bytes by truncating, but | |
269 | keeping the addressing mode bit (which was set from the mask). */ | |
270 | char *addr = alloca (size); | |
271 | char amode; | |
272 | collect_register (regcache, regno, addr); | |
273 | amode = addr[0] & 0x80; | |
274 | memcpy (addr, buf + sizeof (long) - size, size); | |
275 | addr[0] &= ~0x80; | |
276 | addr[0] |= amode; | |
277 | supply_register (regcache, regno, addr); | |
278 | } | |
c642a434 UW |
279 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
280 | || regaddr == PT_ORIGGPR2) | |
442ea881 | 281 | supply_register (regcache, regno, buf + sizeof (long) - size); |
ee1a7ae4 | 282 | else |
442ea881 | 283 | supply_register (regcache, regno, buf); |
ee1a7ae4 UW |
284 | } |
285 | else | |
442ea881 | 286 | supply_register (regcache, regno, buf); |
ee1a7ae4 UW |
287 | } |
288 | ||
b7149293 UW |
289 | /* Provide only a fill function for the general register set. ps_lgetregs |
290 | will use this for NPTL support. */ | |
291 | ||
3aee8918 PA |
292 | static void |
293 | s390_fill_gregset (struct regcache *regcache, void *buf) | |
b7149293 UW |
294 | { |
295 | int i; | |
3aee8918 PA |
296 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
297 | struct usrregs_info *usr = regs_info->usrregs; | |
b7149293 | 298 | |
3aee8918 | 299 | for (i = 0; i < usr->num_regs; i++) |
7803799a | 300 | { |
3aee8918 PA |
301 | if (usr->regmap[i] < PT_PSWMASK |
302 | || usr->regmap[i] > PT_ACR15) | |
7803799a UW |
303 | continue; |
304 | ||
3aee8918 PA |
305 | s390_collect_ptrace_register (regcache, i, |
306 | (char *) buf + usr->regmap[i]); | |
7803799a | 307 | } |
b7149293 UW |
308 | } |
309 | ||
c642a434 UW |
310 | /* Fill and store functions for extended register sets. */ |
311 | ||
c642a434 UW |
312 | static void |
313 | s390_store_last_break (struct regcache *regcache, const void *buf) | |
314 | { | |
3aee8918 PA |
315 | const char *p; |
316 | ||
317 | p = (const char *) buf + 8 - register_size (regcache->tdesc, 0); | |
318 | supply_register_by_name (regcache, "last_break", p); | |
c642a434 UW |
319 | } |
320 | ||
321 | static void | |
322 | s390_fill_system_call (struct regcache *regcache, void *buf) | |
323 | { | |
324 | collect_register_by_name (regcache, "system_call", buf); | |
325 | } | |
326 | ||
327 | static void | |
328 | s390_store_system_call (struct regcache *regcache, const void *buf) | |
329 | { | |
330 | supply_register_by_name (regcache, "system_call", buf); | |
331 | } | |
332 | ||
e5a9158d AA |
333 | static void |
334 | s390_store_tdb (struct regcache *regcache, const void *buf) | |
335 | { | |
336 | int tdb0 = find_regno (regcache->tdesc, "tdb0"); | |
337 | int tr0 = find_regno (regcache->tdesc, "tr0"); | |
338 | int i; | |
339 | ||
340 | for (i = 0; i < 4; i++) | |
341 | supply_register (regcache, tdb0 + i, (const char *) buf + 8 * i); | |
342 | ||
343 | for (i = 0; i < 16; i++) | |
344 | supply_register (regcache, tr0 + i, (const char *) buf + 8 * (16 + i)); | |
345 | } | |
346 | ||
bf2d68ab AA |
347 | static void |
348 | s390_fill_vxrs_low (struct regcache *regcache, void *buf) | |
349 | { | |
350 | int v0 = find_regno (regcache->tdesc, "v0l"); | |
351 | int i; | |
352 | ||
353 | for (i = 0; i < 16; i++) | |
354 | collect_register (regcache, v0 + i, (char *) buf + 8 * i); | |
355 | } | |
356 | ||
357 | static void | |
358 | s390_store_vxrs_low (struct regcache *regcache, const void *buf) | |
359 | { | |
360 | int v0 = find_regno (regcache->tdesc, "v0l"); | |
361 | int i; | |
362 | ||
363 | for (i = 0; i < 16; i++) | |
364 | supply_register (regcache, v0 + i, (const char *) buf + 8 * i); | |
365 | } | |
366 | ||
367 | static void | |
368 | s390_fill_vxrs_high (struct regcache *regcache, void *buf) | |
369 | { | |
370 | int v16 = find_regno (regcache->tdesc, "v16"); | |
371 | int i; | |
372 | ||
373 | for (i = 0; i < 16; i++) | |
374 | collect_register (regcache, v16 + i, (char *) buf + 16 * i); | |
375 | } | |
376 | ||
377 | static void | |
378 | s390_store_vxrs_high (struct regcache *regcache, const void *buf) | |
379 | { | |
380 | int v16 = find_regno (regcache->tdesc, "v16"); | |
381 | int i; | |
382 | ||
383 | for (i = 0; i < 16; i++) | |
384 | supply_register (regcache, v16 + i, (const char *) buf + 16 * i); | |
385 | } | |
386 | ||
3aee8918 | 387 | static struct regset_info s390_regsets[] = { |
1570b33e | 388 | { 0, 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL }, |
feea5f36 AA |
389 | /* Last break address is read-only; no fill function. */ |
390 | { PTRACE_GETREGSET, -1, NT_S390_LAST_BREAK, 0, EXTENDED_REGS, | |
391 | NULL, s390_store_last_break }, | |
c642a434 UW |
392 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_SYSTEM_CALL, 0, |
393 | EXTENDED_REGS, s390_fill_system_call, s390_store_system_call }, | |
e5a9158d AA |
394 | /* TDB is read-only. */ |
395 | { PTRACE_GETREGSET, -1, NT_S390_TDB, 0, EXTENDED_REGS, | |
396 | NULL, s390_store_tdb }, | |
bf2d68ab AA |
397 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_LOW, 0, |
398 | EXTENDED_REGS, s390_fill_vxrs_low, s390_store_vxrs_low }, | |
399 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_HIGH, 0, | |
400 | EXTENDED_REGS, s390_fill_vxrs_high, s390_store_vxrs_high }, | |
1570b33e | 401 | { 0, 0, 0, -1, -1, NULL, NULL } |
b7149293 UW |
402 | }; |
403 | ||
b0ded00b | 404 | |
f450004a | 405 | static const unsigned char s390_breakpoint[] = { 0, 1 }; |
b0ded00b UW |
406 | #define s390_breakpoint_len 2 |
407 | ||
408 | static CORE_ADDR | |
442ea881 | 409 | s390_get_pc (struct regcache *regcache) |
b0ded00b | 410 | { |
3aee8918 | 411 | if (register_size (regcache->tdesc, 0) == 4) |
d61ddec4 | 412 | { |
d6db1fab UW |
413 | unsigned int pswa; |
414 | collect_register_by_name (regcache, "pswa", &pswa); | |
415 | return pswa & 0x7fffffff; | |
d61ddec4 UW |
416 | } |
417 | else | |
418 | { | |
419 | unsigned long pc; | |
442ea881 | 420 | collect_register_by_name (regcache, "pswa", &pc); |
d61ddec4 UW |
421 | return pc; |
422 | } | |
b0ded00b UW |
423 | } |
424 | ||
425 | static void | |
442ea881 | 426 | s390_set_pc (struct regcache *regcache, CORE_ADDR newpc) |
b0ded00b | 427 | { |
3aee8918 | 428 | if (register_size (regcache->tdesc, 0) == 4) |
d61ddec4 | 429 | { |
d6db1fab UW |
430 | unsigned int pswa; |
431 | collect_register_by_name (regcache, "pswa", &pswa); | |
432 | pswa = (pswa & 0x80000000) | (newpc & 0x7fffffff); | |
433 | supply_register_by_name (regcache, "pswa", &pswa); | |
d61ddec4 UW |
434 | } |
435 | else | |
436 | { | |
437 | unsigned long pc = newpc; | |
442ea881 | 438 | supply_register_by_name (regcache, "pswa", &pc); |
d61ddec4 | 439 | } |
b0ded00b UW |
440 | } |
441 | ||
7803799a UW |
442 | #ifdef __s390x__ |
443 | static unsigned long | |
3aee8918 | 444 | s390_get_hwcap (const struct target_desc *tdesc) |
7803799a | 445 | { |
3aee8918 | 446 | int wordsize = register_size (tdesc, 0); |
7803799a UW |
447 | unsigned char *data = alloca (2 * wordsize); |
448 | int offset = 0; | |
449 | ||
450 | while ((*the_target->read_auxv) (offset, data, 2 * wordsize) == 2 * wordsize) | |
451 | { | |
452 | if (wordsize == 4) | |
453 | { | |
454 | unsigned int *data_p = (unsigned int *)data; | |
455 | if (data_p[0] == AT_HWCAP) | |
456 | return data_p[1]; | |
457 | } | |
458 | else | |
459 | { | |
460 | unsigned long *data_p = (unsigned long *)data; | |
461 | if (data_p[0] == AT_HWCAP) | |
462 | return data_p[1]; | |
463 | } | |
464 | ||
465 | offset += 2 * wordsize; | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | #endif | |
d61ddec4 | 471 | |
c642a434 UW |
472 | static int |
473 | s390_check_regset (int pid, int regset, int regsize) | |
474 | { | |
475 | gdb_byte *buf = alloca (regsize); | |
476 | struct iovec iov; | |
477 | ||
478 | iov.iov_base = buf; | |
479 | iov.iov_len = regsize; | |
480 | ||
4ac33720 UW |
481 | if (ptrace (PTRACE_GETREGSET, pid, (long) regset, (long) &iov) >= 0 |
482 | || errno == ENODATA) | |
c642a434 | 483 | return 1; |
4ac33720 | 484 | return 0; |
c642a434 UW |
485 | } |
486 | ||
3aee8918 PA |
487 | #ifdef __s390x__ |
488 | /* For a 31-bit inferior, whether the kernel supports using the full | |
489 | 64-bit GPRs. */ | |
490 | static int have_hwcap_s390_high_gprs = 0; | |
491 | #endif | |
492 | ||
d61ddec4 UW |
493 | static void |
494 | s390_arch_setup (void) | |
495 | { | |
3aee8918 | 496 | const struct target_desc *tdesc; |
c642a434 UW |
497 | struct regset_info *regset; |
498 | ||
499 | /* Check whether the kernel supports extra register sets. */ | |
0bfdf32f | 500 | int pid = pid_of (current_thread); |
c642a434 UW |
501 | int have_regset_last_break |
502 | = s390_check_regset (pid, NT_S390_LAST_BREAK, 8); | |
503 | int have_regset_system_call | |
504 | = s390_check_regset (pid, NT_S390_SYSTEM_CALL, 4); | |
4ac33720 | 505 | int have_regset_tdb = s390_check_regset (pid, NT_S390_TDB, 256); |
bf2d68ab AA |
506 | int have_regset_vxrs = s390_check_regset (pid, NT_S390_VXRS_LOW, 128) |
507 | && s390_check_regset (pid, NT_S390_VXRS_HIGH, 256); | |
c642a434 | 508 | |
d61ddec4 | 509 | /* Assume 31-bit inferior process. */ |
c642a434 | 510 | if (have_regset_system_call) |
3aee8918 | 511 | tdesc = tdesc_s390_linux32v2; |
c642a434 | 512 | else if (have_regset_last_break) |
3aee8918 | 513 | tdesc = tdesc_s390_linux32v1; |
c642a434 | 514 | else |
3aee8918 | 515 | tdesc = tdesc_s390_linux32; |
d61ddec4 UW |
516 | |
517 | /* On a 64-bit host, check the low bit of the (31-bit) PSWM | |
518 | -- if this is one, we actually have a 64-bit inferior. */ | |
519 | #ifdef __s390x__ | |
520 | { | |
521 | unsigned int pswm; | |
3aee8918 | 522 | struct regcache *regcache = new_register_cache (tdesc); |
6682d959 | 523 | |
3aee8918 | 524 | fetch_inferior_registers (regcache, find_regno (tdesc, "pswm")); |
442ea881 | 525 | collect_register_by_name (regcache, "pswm", &pswm); |
92b72907 UW |
526 | free_register_cache (regcache); |
527 | ||
d61ddec4 | 528 | if (pswm & 1) |
c642a434 | 529 | { |
6682d959 AA |
530 | if (have_regset_tdb) |
531 | have_regset_tdb = | |
532 | (s390_get_hwcap (tdesc_s390x_linux64v2) & HWCAP_S390_TE) != 0; | |
bf2d68ab AA |
533 | if (have_regset_vxrs) |
534 | have_regset_vxrs = | |
535 | (s390_get_hwcap (tdesc_s390x_linux64v2) & HWCAP_S390_VX) != 0; | |
536 | ||
537 | if (have_regset_vxrs) | |
538 | tdesc = (have_regset_tdb ? tdesc_s390x_tevx_linux64 : | |
539 | tdesc_s390x_vx_linux64); | |
540 | else if (have_regset_tdb) | |
4ac33720 | 541 | tdesc = tdesc_s390x_te_linux64; |
6682d959 | 542 | else if (have_regset_system_call) |
3aee8918 | 543 | tdesc = tdesc_s390x_linux64v2; |
c642a434 | 544 | else if (have_regset_last_break) |
3aee8918 | 545 | tdesc = tdesc_s390x_linux64v1; |
c642a434 | 546 | else |
3aee8918 | 547 | tdesc = tdesc_s390x_linux64; |
c642a434 | 548 | } |
7803799a UW |
549 | |
550 | /* For a 31-bit inferior, check whether the kernel supports | |
551 | using the full 64-bit GPRs. */ | |
3aee8918 | 552 | else if (s390_get_hwcap (tdesc) & HWCAP_S390_HIGH_GPRS) |
7803799a | 553 | { |
3aee8918 | 554 | have_hwcap_s390_high_gprs = 1; |
6682d959 AA |
555 | if (have_regset_tdb) |
556 | have_regset_tdb = (s390_get_hwcap (tdesc) & HWCAP_S390_TE) != 0; | |
bf2d68ab AA |
557 | if (have_regset_vxrs) |
558 | have_regset_vxrs = (s390_get_hwcap (tdesc) & HWCAP_S390_VX) != 0; | |
3aee8918 | 559 | |
bf2d68ab AA |
560 | if (have_regset_vxrs) |
561 | tdesc = (have_regset_tdb ? tdesc_s390_tevx_linux64 : | |
562 | tdesc_s390_vx_linux64); | |
563 | else if (have_regset_tdb) | |
4ac33720 UW |
564 | tdesc = tdesc_s390_te_linux64; |
565 | else if (have_regset_system_call) | |
3aee8918 | 566 | tdesc = tdesc_s390_linux64v2; |
c642a434 | 567 | else if (have_regset_last_break) |
3aee8918 | 568 | tdesc = tdesc_s390_linux64v1; |
c642a434 | 569 | else |
3aee8918 | 570 | tdesc = tdesc_s390_linux64; |
7803799a | 571 | } |
d61ddec4 UW |
572 | } |
573 | #endif | |
6682d959 AA |
574 | |
575 | /* Update target_regsets according to available register sets. */ | |
feea5f36 | 576 | for (regset = s390_regsets; regset->size >= 0; regset++) |
6682d959 AA |
577 | if (regset->get_request == PTRACE_GETREGSET) |
578 | switch (regset->nt_type) | |
579 | { | |
580 | case NT_S390_LAST_BREAK: | |
581 | regset->size = have_regset_last_break? 8 : 0; | |
582 | break; | |
583 | case NT_S390_SYSTEM_CALL: | |
584 | regset->size = have_regset_system_call? 4 : 0; | |
585 | break; | |
586 | case NT_S390_TDB: | |
587 | regset->size = have_regset_tdb ? 256 : 0; | |
bf2d68ab AA |
588 | break; |
589 | case NT_S390_VXRS_LOW: | |
590 | regset->size = have_regset_vxrs ? 128 : 0; | |
591 | break; | |
592 | case NT_S390_VXRS_HIGH: | |
593 | regset->size = have_regset_vxrs ? 256 : 0; | |
594 | break; | |
6682d959 AA |
595 | default: |
596 | break; | |
597 | } | |
598 | ||
3aee8918 | 599 | current_process ()->tdesc = tdesc; |
d61ddec4 UW |
600 | } |
601 | ||
602 | ||
b0ded00b UW |
603 | static int |
604 | s390_breakpoint_at (CORE_ADDR pc) | |
605 | { | |
606 | unsigned char c[s390_breakpoint_len]; | |
607 | read_inferior_memory (pc, c, s390_breakpoint_len); | |
608 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; | |
609 | } | |
610 | ||
3aee8918 PA |
611 | static struct usrregs_info s390_usrregs_info = |
612 | { | |
613 | s390_num_regs, | |
614 | s390_regmap, | |
615 | }; | |
616 | ||
617 | static struct regsets_info s390_regsets_info = | |
618 | { | |
619 | s390_regsets, /* regsets */ | |
620 | 0, /* num_regsets */ | |
621 | NULL, /* disabled_regsets */ | |
622 | }; | |
623 | ||
624 | static struct regs_info regs_info = | |
625 | { | |
626 | NULL, /* regset_bitmap */ | |
627 | &s390_usrregs_info, | |
628 | &s390_regsets_info | |
629 | }; | |
630 | ||
631 | #ifdef __s390x__ | |
632 | static struct usrregs_info s390_usrregs_info_3264 = | |
633 | { | |
634 | s390_num_regs_3264, | |
635 | s390_regmap_3264 | |
636 | }; | |
637 | ||
638 | static struct regsets_info s390_regsets_info_3264 = | |
639 | { | |
640 | s390_regsets, /* regsets */ | |
641 | 0, /* num_regsets */ | |
642 | NULL, /* disabled_regsets */ | |
643 | }; | |
644 | ||
645 | static struct regs_info regs_info_3264 = | |
646 | { | |
647 | NULL, /* regset_bitmap */ | |
648 | &s390_usrregs_info_3264, | |
649 | &s390_regsets_info_3264 | |
650 | }; | |
651 | #endif | |
652 | ||
653 | static const struct regs_info * | |
654 | s390_regs_info (void) | |
655 | { | |
656 | #ifdef __s390x__ | |
657 | if (have_hwcap_s390_high_gprs) | |
658 | { | |
659 | const struct target_desc *tdesc = current_process ()->tdesc; | |
660 | ||
661 | if (register_size (tdesc, 0) == 4) | |
662 | return ®s_info_3264; | |
663 | } | |
664 | #endif | |
665 | return ®s_info; | |
666 | } | |
b0ded00b | 667 | |
2ec06d2e | 668 | struct linux_target_ops the_low_target = { |
d61ddec4 | 669 | s390_arch_setup, |
3aee8918 | 670 | s390_regs_info, |
2ec06d2e DJ |
671 | s390_cannot_fetch_register, |
672 | s390_cannot_store_register, | |
c14dfd32 | 673 | NULL, /* fetch_register */ |
b0ded00b UW |
674 | s390_get_pc, |
675 | s390_set_pc, | |
676 | s390_breakpoint, | |
677 | s390_breakpoint_len, | |
678 | NULL, | |
679 | s390_breakpoint_len, | |
680 | s390_breakpoint_at, | |
802e8e6d | 681 | NULL, /* supports_z_point_type */ |
ee1a7ae4 UW |
682 | NULL, |
683 | NULL, | |
684 | NULL, | |
685 | NULL, | |
686 | s390_collect_ptrace_register, | |
687 | s390_supply_ptrace_register, | |
2ec06d2e | 688 | }; |
3aee8918 PA |
689 | |
690 | void | |
691 | initialize_low_arch (void) | |
692 | { | |
693 | /* Initialize the Linux target descriptions. */ | |
694 | ||
695 | init_registers_s390_linux32 (); | |
696 | init_registers_s390_linux32v1 (); | |
697 | init_registers_s390_linux32v2 (); | |
698 | init_registers_s390_linux64 (); | |
699 | init_registers_s390_linux64v1 (); | |
700 | init_registers_s390_linux64v2 (); | |
4ac33720 | 701 | init_registers_s390_te_linux64 (); |
bf2d68ab AA |
702 | init_registers_s390_vx_linux64 (); |
703 | init_registers_s390_tevx_linux64 (); | |
3aee8918 PA |
704 | init_registers_s390x_linux64 (); |
705 | init_registers_s390x_linux64v1 (); | |
706 | init_registers_s390x_linux64v2 (); | |
4ac33720 | 707 | init_registers_s390x_te_linux64 (); |
bf2d68ab AA |
708 | init_registers_s390x_vx_linux64 (); |
709 | init_registers_s390x_tevx_linux64 (); | |
3aee8918 PA |
710 | |
711 | initialize_regsets_info (&s390_regsets_info); | |
712 | #ifdef __s390x__ | |
713 | initialize_regsets_info (&s390_regsets_info_3264); | |
714 | #endif | |
715 | } |