| 1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
| 2 | for GDB. |
| 3 | Copyright (C) 2001-2016 Free Software Foundation, Inc. |
| 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 |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 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 |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 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" |
| 24 | #include "elf/common.h" |
| 25 | |
| 26 | #include <asm/ptrace.h> |
| 27 | #include "nat/gdb_ptrace.h" |
| 28 | #include <sys/uio.h> |
| 29 | #include <elf.h> |
| 30 | |
| 31 | #ifndef HWCAP_S390_HIGH_GPRS |
| 32 | #define HWCAP_S390_HIGH_GPRS 512 |
| 33 | #endif |
| 34 | |
| 35 | #ifndef HWCAP_S390_TE |
| 36 | #define HWCAP_S390_TE 1024 |
| 37 | #endif |
| 38 | |
| 39 | #ifndef HWCAP_S390_VX |
| 40 | #define HWCAP_S390_VX 2048 |
| 41 | #endif |
| 42 | |
| 43 | /* Defined in auto-generated file s390-linux32.c. */ |
| 44 | void init_registers_s390_linux32 (void); |
| 45 | extern const struct target_desc *tdesc_s390_linux32; |
| 46 | |
| 47 | /* Defined in auto-generated file s390-linux32v1.c. */ |
| 48 | void init_registers_s390_linux32v1 (void); |
| 49 | extern const struct target_desc *tdesc_s390_linux32v1; |
| 50 | |
| 51 | /* Defined in auto-generated file s390-linux32v2.c. */ |
| 52 | void init_registers_s390_linux32v2 (void); |
| 53 | extern const struct target_desc *tdesc_s390_linux32v2; |
| 54 | |
| 55 | /* Defined in auto-generated file s390-linux64.c. */ |
| 56 | void init_registers_s390_linux64 (void); |
| 57 | extern const struct target_desc *tdesc_s390_linux64; |
| 58 | |
| 59 | /* Defined in auto-generated file s390-linux64v1.c. */ |
| 60 | void init_registers_s390_linux64v1 (void); |
| 61 | extern const struct target_desc *tdesc_s390_linux64v1; |
| 62 | |
| 63 | /* Defined in auto-generated file s390-linux64v2.c. */ |
| 64 | void init_registers_s390_linux64v2 (void); |
| 65 | extern const struct target_desc *tdesc_s390_linux64v2; |
| 66 | |
| 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 | |
| 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 | |
| 79 | /* Defined in auto-generated file s390x-linux64.c. */ |
| 80 | void init_registers_s390x_linux64 (void); |
| 81 | extern const struct target_desc *tdesc_s390x_linux64; |
| 82 | |
| 83 | /* Defined in auto-generated file s390x-linux64v1.c. */ |
| 84 | void init_registers_s390x_linux64v1 (void); |
| 85 | extern const struct target_desc *tdesc_s390x_linux64v1; |
| 86 | |
| 87 | /* Defined in auto-generated file s390x-linux64v2.c. */ |
| 88 | void init_registers_s390x_linux64v2 (void); |
| 89 | extern const struct target_desc *tdesc_s390x_linux64v2; |
| 90 | |
| 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 | |
| 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 | |
| 103 | #define s390_num_regs 52 |
| 104 | |
| 105 | static int s390_regmap[] = { |
| 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 | |
| 118 | PT_FPC, |
| 119 | |
| 120 | #ifndef __s390x__ |
| 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 |
| 131 | |
| 132 | PT_ORIGGPR2, |
| 133 | }; |
| 134 | |
| 135 | #define s390_num_regs_3264 68 |
| 136 | |
| 137 | #ifdef __s390x__ |
| 138 | static int s390_regmap_3264[] = { |
| 139 | PT_PSWMASK, PT_PSWADDR, |
| 140 | |
| 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, |
| 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, |
| 161 | |
| 162 | PT_ORIGGPR2, |
| 163 | }; |
| 164 | #else |
| 165 | static int s390_regmap_3264[] = { |
| 166 | PT_PSWMASK, PT_PSWADDR, |
| 167 | |
| 168 | -1, PT_GPR0, -1, PT_GPR1, |
| 169 | -1, PT_GPR2, -1, PT_GPR3, |
| 170 | -1, PT_GPR4, -1, PT_GPR5, |
| 171 | -1, PT_GPR6, -1, PT_GPR7, |
| 172 | -1, PT_GPR8, -1, PT_GPR9, |
| 173 | -1, PT_GPR10, -1, PT_GPR11, |
| 174 | -1, PT_GPR12, -1, PT_GPR13, |
| 175 | -1, PT_GPR14, -1, PT_GPR15, |
| 176 | |
| 177 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, |
| 178 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, |
| 179 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, |
| 180 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, |
| 181 | |
| 182 | PT_FPC, |
| 183 | |
| 184 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
| 185 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, |
| 186 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, |
| 187 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, |
| 188 | |
| 189 | PT_ORIGGPR2, |
| 190 | }; |
| 191 | #endif |
| 192 | |
| 193 | |
| 194 | static int |
| 195 | s390_cannot_fetch_register (int regno) |
| 196 | { |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | static int |
| 201 | s390_cannot_store_register (int regno) |
| 202 | { |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static void |
| 207 | s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf) |
| 208 | { |
| 209 | int size = register_size (regcache->tdesc, regno); |
| 210 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
| 211 | struct usrregs_info *usr = regs_info->usrregs; |
| 212 | int regaddr = usr->regmap[regno]; |
| 213 | |
| 214 | if (size < sizeof (long)) |
| 215 | { |
| 216 | memset (buf, 0, sizeof (long)); |
| 217 | |
| 218 | if ((regno ^ 1) < usr->num_regs |
| 219 | && usr->regmap[regno ^ 1] == regaddr) |
| 220 | { |
| 221 | collect_register (regcache, regno & ~1, buf); |
| 222 | collect_register (regcache, (regno & ~1) + 1, |
| 223 | buf + sizeof (long) - size); |
| 224 | } |
| 225 | else if (regaddr == PT_PSWMASK) |
| 226 | { |
| 227 | /* Convert 4-byte PSW mask to 8 bytes by clearing bit 12 and copying |
| 228 | the basic addressing mode bit from the PSW address. */ |
| 229 | char *addr = alloca (register_size (regcache->tdesc, regno ^ 1)); |
| 230 | collect_register (regcache, regno, buf); |
| 231 | collect_register (regcache, regno ^ 1, addr); |
| 232 | buf[1] &= ~0x8; |
| 233 | buf[size] |= (addr[0] & 0x80); |
| 234 | } |
| 235 | else if (regaddr == PT_PSWADDR) |
| 236 | { |
| 237 | /* Convert 4-byte PSW address to 8 bytes by clearing the addressing |
| 238 | mode bit (which gets copied to the PSW mask instead). */ |
| 239 | collect_register (regcache, regno, buf + sizeof (long) - size); |
| 240 | buf[sizeof (long) - size] &= ~0x80; |
| 241 | } |
| 242 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
| 243 | || regaddr == PT_ORIGGPR2) |
| 244 | collect_register (regcache, regno, buf + sizeof (long) - size); |
| 245 | else |
| 246 | collect_register (regcache, regno, buf); |
| 247 | } |
| 248 | else if (regaddr != -1) |
| 249 | collect_register (regcache, regno, buf); |
| 250 | } |
| 251 | |
| 252 | static void |
| 253 | s390_supply_ptrace_register (struct regcache *regcache, |
| 254 | int regno, const char *buf) |
| 255 | { |
| 256 | int size = register_size (regcache->tdesc, regno); |
| 257 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
| 258 | struct usrregs_info *usr = regs_info->usrregs; |
| 259 | int regaddr = usr->regmap[regno]; |
| 260 | |
| 261 | if (size < sizeof (long)) |
| 262 | { |
| 263 | if ((regno ^ 1) < usr->num_regs |
| 264 | && usr->regmap[regno ^ 1] == regaddr) |
| 265 | { |
| 266 | supply_register (regcache, regno & ~1, buf); |
| 267 | supply_register (regcache, (regno & ~1) + 1, |
| 268 | buf + sizeof (long) - size); |
| 269 | } |
| 270 | else if (regaddr == PT_PSWMASK) |
| 271 | { |
| 272 | /* Convert 8-byte PSW mask to 4 bytes by setting bit 12 and copying |
| 273 | the basic addressing mode into the PSW address. */ |
| 274 | char *mask = alloca (size); |
| 275 | char *addr = alloca (register_size (regcache->tdesc, regno ^ 1)); |
| 276 | memcpy (mask, buf, size); |
| 277 | mask[1] |= 0x8; |
| 278 | supply_register (regcache, regno, mask); |
| 279 | |
| 280 | collect_register (regcache, regno ^ 1, addr); |
| 281 | addr[0] &= ~0x80; |
| 282 | addr[0] |= (buf[size] & 0x80); |
| 283 | supply_register (regcache, regno ^ 1, addr); |
| 284 | } |
| 285 | else if (regaddr == PT_PSWADDR) |
| 286 | { |
| 287 | /* Convert 8-byte PSW address to 4 bytes by truncating, but |
| 288 | keeping the addressing mode bit (which was set from the mask). */ |
| 289 | char *addr = alloca (size); |
| 290 | char amode; |
| 291 | collect_register (regcache, regno, addr); |
| 292 | amode = addr[0] & 0x80; |
| 293 | memcpy (addr, buf + sizeof (long) - size, size); |
| 294 | addr[0] &= ~0x80; |
| 295 | addr[0] |= amode; |
| 296 | supply_register (regcache, regno, addr); |
| 297 | } |
| 298 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
| 299 | || regaddr == PT_ORIGGPR2) |
| 300 | supply_register (regcache, regno, buf + sizeof (long) - size); |
| 301 | else |
| 302 | supply_register (regcache, regno, buf); |
| 303 | } |
| 304 | else if (regaddr != -1) |
| 305 | supply_register (regcache, regno, buf); |
| 306 | } |
| 307 | |
| 308 | /* Provide only a fill function for the general register set. ps_lgetregs |
| 309 | will use this for NPTL support. */ |
| 310 | |
| 311 | static void |
| 312 | s390_fill_gregset (struct regcache *regcache, void *buf) |
| 313 | { |
| 314 | int i; |
| 315 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); |
| 316 | struct usrregs_info *usr = regs_info->usrregs; |
| 317 | |
| 318 | for (i = 0; i < usr->num_regs; i++) |
| 319 | { |
| 320 | if (usr->regmap[i] < PT_PSWMASK |
| 321 | || usr->regmap[i] > PT_ACR15) |
| 322 | continue; |
| 323 | |
| 324 | s390_collect_ptrace_register (regcache, i, |
| 325 | (char *) buf + usr->regmap[i]); |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | /* Fill and store functions for extended register sets. */ |
| 330 | |
| 331 | #ifndef __s390x__ |
| 332 | static void |
| 333 | s390_fill_gprs_high (struct regcache *regcache, void *buf) |
| 334 | { |
| 335 | int r0h = find_regno (regcache->tdesc, "r0h"); |
| 336 | int i; |
| 337 | |
| 338 | for (i = 0; i < 16; i++) |
| 339 | collect_register (regcache, r0h + 2 * i, (char *) buf + 4 * i); |
| 340 | } |
| 341 | |
| 342 | static void |
| 343 | s390_store_gprs_high (struct regcache *regcache, const void *buf) |
| 344 | { |
| 345 | int r0h = find_regno (regcache->tdesc, "r0h"); |
| 346 | int i; |
| 347 | |
| 348 | for (i = 0; i < 16; i++) |
| 349 | supply_register (regcache, r0h + 2 * i, (const char *) buf + 4 * i); |
| 350 | } |
| 351 | #endif |
| 352 | |
| 353 | static void |
| 354 | s390_store_last_break (struct regcache *regcache, const void *buf) |
| 355 | { |
| 356 | const char *p; |
| 357 | |
| 358 | p = (const char *) buf + 8 - register_size (regcache->tdesc, 0); |
| 359 | supply_register_by_name (regcache, "last_break", p); |
| 360 | } |
| 361 | |
| 362 | static void |
| 363 | s390_fill_system_call (struct regcache *regcache, void *buf) |
| 364 | { |
| 365 | collect_register_by_name (regcache, "system_call", buf); |
| 366 | } |
| 367 | |
| 368 | static void |
| 369 | s390_store_system_call (struct regcache *regcache, const void *buf) |
| 370 | { |
| 371 | supply_register_by_name (regcache, "system_call", buf); |
| 372 | } |
| 373 | |
| 374 | static void |
| 375 | s390_store_tdb (struct regcache *regcache, const void *buf) |
| 376 | { |
| 377 | int tdb0 = find_regno (regcache->tdesc, "tdb0"); |
| 378 | int tr0 = find_regno (regcache->tdesc, "tr0"); |
| 379 | int i; |
| 380 | |
| 381 | for (i = 0; i < 4; i++) |
| 382 | supply_register (regcache, tdb0 + i, (const char *) buf + 8 * i); |
| 383 | |
| 384 | for (i = 0; i < 16; i++) |
| 385 | supply_register (regcache, tr0 + i, (const char *) buf + 8 * (16 + i)); |
| 386 | } |
| 387 | |
| 388 | static void |
| 389 | s390_fill_vxrs_low (struct regcache *regcache, void *buf) |
| 390 | { |
| 391 | int v0 = find_regno (regcache->tdesc, "v0l"); |
| 392 | int i; |
| 393 | |
| 394 | for (i = 0; i < 16; i++) |
| 395 | collect_register (regcache, v0 + i, (char *) buf + 8 * i); |
| 396 | } |
| 397 | |
| 398 | static void |
| 399 | s390_store_vxrs_low (struct regcache *regcache, const void *buf) |
| 400 | { |
| 401 | int v0 = find_regno (regcache->tdesc, "v0l"); |
| 402 | int i; |
| 403 | |
| 404 | for (i = 0; i < 16; i++) |
| 405 | supply_register (regcache, v0 + i, (const char *) buf + 8 * i); |
| 406 | } |
| 407 | |
| 408 | static void |
| 409 | s390_fill_vxrs_high (struct regcache *regcache, void *buf) |
| 410 | { |
| 411 | int v16 = find_regno (regcache->tdesc, "v16"); |
| 412 | int i; |
| 413 | |
| 414 | for (i = 0; i < 16; i++) |
| 415 | collect_register (regcache, v16 + i, (char *) buf + 16 * i); |
| 416 | } |
| 417 | |
| 418 | static void |
| 419 | s390_store_vxrs_high (struct regcache *regcache, const void *buf) |
| 420 | { |
| 421 | int v16 = find_regno (regcache->tdesc, "v16"); |
| 422 | int i; |
| 423 | |
| 424 | for (i = 0; i < 16; i++) |
| 425 | supply_register (regcache, v16 + i, (const char *) buf + 16 * i); |
| 426 | } |
| 427 | |
| 428 | static struct regset_info s390_regsets[] = { |
| 429 | { 0, 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL }, |
| 430 | #ifndef __s390x__ |
| 431 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_HIGH_GPRS, 0, |
| 432 | EXTENDED_REGS, s390_fill_gprs_high, s390_store_gprs_high }, |
| 433 | #endif |
| 434 | /* Last break address is read-only; no fill function. */ |
| 435 | { PTRACE_GETREGSET, -1, NT_S390_LAST_BREAK, 0, EXTENDED_REGS, |
| 436 | NULL, s390_store_last_break }, |
| 437 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_SYSTEM_CALL, 0, |
| 438 | EXTENDED_REGS, s390_fill_system_call, s390_store_system_call }, |
| 439 | /* TDB is read-only. */ |
| 440 | { PTRACE_GETREGSET, -1, NT_S390_TDB, 0, EXTENDED_REGS, |
| 441 | NULL, s390_store_tdb }, |
| 442 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_LOW, 0, |
| 443 | EXTENDED_REGS, s390_fill_vxrs_low, s390_store_vxrs_low }, |
| 444 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_HIGH, 0, |
| 445 | EXTENDED_REGS, s390_fill_vxrs_high, s390_store_vxrs_high }, |
| 446 | NULL_REGSET |
| 447 | }; |
| 448 | |
| 449 | |
| 450 | static const gdb_byte s390_breakpoint[] = { 0, 1 }; |
| 451 | #define s390_breakpoint_len 2 |
| 452 | |
| 453 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
| 454 | |
| 455 | static const gdb_byte * |
| 456 | s390_sw_breakpoint_from_kind (int kind, int *size) |
| 457 | { |
| 458 | *size = s390_breakpoint_len; |
| 459 | return s390_breakpoint; |
| 460 | } |
| 461 | |
| 462 | static CORE_ADDR |
| 463 | s390_get_pc (struct regcache *regcache) |
| 464 | { |
| 465 | if (register_size (regcache->tdesc, 0) == 4) |
| 466 | { |
| 467 | unsigned int pswa; |
| 468 | collect_register_by_name (regcache, "pswa", &pswa); |
| 469 | return pswa & 0x7fffffff; |
| 470 | } |
| 471 | else |
| 472 | { |
| 473 | unsigned long pc; |
| 474 | collect_register_by_name (regcache, "pswa", &pc); |
| 475 | return pc; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | static void |
| 480 | s390_set_pc (struct regcache *regcache, CORE_ADDR newpc) |
| 481 | { |
| 482 | if (register_size (regcache->tdesc, 0) == 4) |
| 483 | { |
| 484 | unsigned int pswa; |
| 485 | collect_register_by_name (regcache, "pswa", &pswa); |
| 486 | pswa = (pswa & 0x80000000) | (newpc & 0x7fffffff); |
| 487 | supply_register_by_name (regcache, "pswa", &pswa); |
| 488 | } |
| 489 | else |
| 490 | { |
| 491 | unsigned long pc = newpc; |
| 492 | supply_register_by_name (regcache, "pswa", &pc); |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | static unsigned long |
| 497 | s390_get_hwcap (const struct target_desc *tdesc) |
| 498 | { |
| 499 | int wordsize = register_size (tdesc, 0); |
| 500 | unsigned char *data = alloca (2 * wordsize); |
| 501 | int offset = 0; |
| 502 | |
| 503 | while ((*the_target->read_auxv) (offset, data, 2 * wordsize) == 2 * wordsize) |
| 504 | { |
| 505 | if (wordsize == 4) |
| 506 | { |
| 507 | unsigned int *data_p = (unsigned int *)data; |
| 508 | if (data_p[0] == AT_HWCAP) |
| 509 | return data_p[1]; |
| 510 | } |
| 511 | else |
| 512 | { |
| 513 | unsigned long *data_p = (unsigned long *)data; |
| 514 | if (data_p[0] == AT_HWCAP) |
| 515 | return data_p[1]; |
| 516 | } |
| 517 | |
| 518 | offset += 2 * wordsize; |
| 519 | } |
| 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | static int |
| 525 | s390_check_regset (int pid, int regset, int regsize) |
| 526 | { |
| 527 | gdb_byte *buf = alloca (regsize); |
| 528 | struct iovec iov; |
| 529 | |
| 530 | iov.iov_base = buf; |
| 531 | iov.iov_len = regsize; |
| 532 | |
| 533 | if (ptrace (PTRACE_GETREGSET, pid, (long) regset, (long) &iov) >= 0 |
| 534 | || errno == ENODATA) |
| 535 | return 1; |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | /* For a 31-bit inferior, whether the kernel supports using the full |
| 540 | 64-bit GPRs. */ |
| 541 | static int have_hwcap_s390_high_gprs = 0; |
| 542 | |
| 543 | static void |
| 544 | s390_arch_setup (void) |
| 545 | { |
| 546 | const struct target_desc *tdesc; |
| 547 | struct regset_info *regset; |
| 548 | |
| 549 | /* Check whether the kernel supports extra register sets. */ |
| 550 | int pid = pid_of (current_thread); |
| 551 | int have_regset_last_break |
| 552 | = s390_check_regset (pid, NT_S390_LAST_BREAK, 8); |
| 553 | int have_regset_system_call |
| 554 | = s390_check_regset (pid, NT_S390_SYSTEM_CALL, 4); |
| 555 | int have_regset_tdb = s390_check_regset (pid, NT_S390_TDB, 256); |
| 556 | int have_regset_vxrs = s390_check_regset (pid, NT_S390_VXRS_LOW, 128) |
| 557 | && s390_check_regset (pid, NT_S390_VXRS_HIGH, 256); |
| 558 | |
| 559 | /* Assume 31-bit inferior process. */ |
| 560 | if (have_regset_system_call) |
| 561 | tdesc = tdesc_s390_linux32v2; |
| 562 | else if (have_regset_last_break) |
| 563 | tdesc = tdesc_s390_linux32v1; |
| 564 | else |
| 565 | tdesc = tdesc_s390_linux32; |
| 566 | |
| 567 | /* On a 64-bit host, check the low bit of the (31-bit) PSWM |
| 568 | -- if this is one, we actually have a 64-bit inferior. */ |
| 569 | { |
| 570 | #ifdef __s390x__ |
| 571 | unsigned int pswm; |
| 572 | struct regcache *regcache = new_register_cache (tdesc); |
| 573 | |
| 574 | fetch_inferior_registers (regcache, find_regno (tdesc, "pswm")); |
| 575 | collect_register_by_name (regcache, "pswm", &pswm); |
| 576 | free_register_cache (regcache); |
| 577 | |
| 578 | if (pswm & 1) |
| 579 | { |
| 580 | if (have_regset_tdb) |
| 581 | have_regset_tdb = |
| 582 | (s390_get_hwcap (tdesc_s390x_linux64v2) & HWCAP_S390_TE) != 0; |
| 583 | if (have_regset_vxrs) |
| 584 | have_regset_vxrs = |
| 585 | (s390_get_hwcap (tdesc_s390x_linux64v2) & HWCAP_S390_VX) != 0; |
| 586 | |
| 587 | if (have_regset_vxrs) |
| 588 | tdesc = (have_regset_tdb ? tdesc_s390x_tevx_linux64 : |
| 589 | tdesc_s390x_vx_linux64); |
| 590 | else if (have_regset_tdb) |
| 591 | tdesc = tdesc_s390x_te_linux64; |
| 592 | else if (have_regset_system_call) |
| 593 | tdesc = tdesc_s390x_linux64v2; |
| 594 | else if (have_regset_last_break) |
| 595 | tdesc = tdesc_s390x_linux64v1; |
| 596 | else |
| 597 | tdesc = tdesc_s390x_linux64; |
| 598 | } |
| 599 | |
| 600 | /* For a 31-bit inferior, check whether the kernel supports |
| 601 | using the full 64-bit GPRs. */ |
| 602 | else |
| 603 | #endif |
| 604 | if (s390_get_hwcap (tdesc) & HWCAP_S390_HIGH_GPRS) |
| 605 | { |
| 606 | have_hwcap_s390_high_gprs = 1; |
| 607 | if (have_regset_tdb) |
| 608 | have_regset_tdb = (s390_get_hwcap (tdesc) & HWCAP_S390_TE) != 0; |
| 609 | if (have_regset_vxrs) |
| 610 | have_regset_vxrs = (s390_get_hwcap (tdesc) & HWCAP_S390_VX) != 0; |
| 611 | |
| 612 | if (have_regset_vxrs) |
| 613 | tdesc = (have_regset_tdb ? tdesc_s390_tevx_linux64 : |
| 614 | tdesc_s390_vx_linux64); |
| 615 | else if (have_regset_tdb) |
| 616 | tdesc = tdesc_s390_te_linux64; |
| 617 | else if (have_regset_system_call) |
| 618 | tdesc = tdesc_s390_linux64v2; |
| 619 | else if (have_regset_last_break) |
| 620 | tdesc = tdesc_s390_linux64v1; |
| 621 | else |
| 622 | tdesc = tdesc_s390_linux64; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /* Update target_regsets according to available register sets. */ |
| 627 | for (regset = s390_regsets; regset->size >= 0; regset++) |
| 628 | if (regset->get_request == PTRACE_GETREGSET) |
| 629 | switch (regset->nt_type) |
| 630 | { |
| 631 | #ifndef __s390x__ |
| 632 | case NT_S390_HIGH_GPRS: |
| 633 | regset->size = have_hwcap_s390_high_gprs ? 64 : 0; |
| 634 | break; |
| 635 | #endif |
| 636 | case NT_S390_LAST_BREAK: |
| 637 | regset->size = have_regset_last_break ? 8 : 0; |
| 638 | break; |
| 639 | case NT_S390_SYSTEM_CALL: |
| 640 | regset->size = have_regset_system_call ? 4 : 0; |
| 641 | break; |
| 642 | case NT_S390_TDB: |
| 643 | regset->size = have_regset_tdb ? 256 : 0; |
| 644 | break; |
| 645 | case NT_S390_VXRS_LOW: |
| 646 | regset->size = have_regset_vxrs ? 128 : 0; |
| 647 | break; |
| 648 | case NT_S390_VXRS_HIGH: |
| 649 | regset->size = have_regset_vxrs ? 256 : 0; |
| 650 | break; |
| 651 | default: |
| 652 | break; |
| 653 | } |
| 654 | |
| 655 | current_process ()->tdesc = tdesc; |
| 656 | } |
| 657 | |
| 658 | |
| 659 | static int |
| 660 | s390_breakpoint_at (CORE_ADDR pc) |
| 661 | { |
| 662 | unsigned char c[s390_breakpoint_len]; |
| 663 | read_inferior_memory (pc, c, s390_breakpoint_len); |
| 664 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; |
| 665 | } |
| 666 | |
| 667 | /* Breakpoint/Watchpoint support. */ |
| 668 | |
| 669 | /* The "supports_z_point_type" linux_target_ops method. */ |
| 670 | |
| 671 | static int |
| 672 | s390_supports_z_point_type (char z_type) |
| 673 | { |
| 674 | switch (z_type) |
| 675 | { |
| 676 | case Z_PACKET_SW_BP: |
| 677 | return 1; |
| 678 | default: |
| 679 | return 0; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | /* Support for hardware single step. */ |
| 684 | |
| 685 | static int |
| 686 | s390_supports_hardware_single_step (void) |
| 687 | { |
| 688 | return 1; |
| 689 | } |
| 690 | |
| 691 | static struct usrregs_info s390_usrregs_info = |
| 692 | { |
| 693 | s390_num_regs, |
| 694 | s390_regmap, |
| 695 | }; |
| 696 | |
| 697 | static struct regsets_info s390_regsets_info = |
| 698 | { |
| 699 | s390_regsets, /* regsets */ |
| 700 | 0, /* num_regsets */ |
| 701 | NULL, /* disabled_regsets */ |
| 702 | }; |
| 703 | |
| 704 | static struct regs_info regs_info = |
| 705 | { |
| 706 | NULL, /* regset_bitmap */ |
| 707 | &s390_usrregs_info, |
| 708 | &s390_regsets_info |
| 709 | }; |
| 710 | |
| 711 | static struct usrregs_info s390_usrregs_info_3264 = |
| 712 | { |
| 713 | s390_num_regs_3264, |
| 714 | s390_regmap_3264 |
| 715 | }; |
| 716 | |
| 717 | static struct regsets_info s390_regsets_info_3264 = |
| 718 | { |
| 719 | s390_regsets, /* regsets */ |
| 720 | 0, /* num_regsets */ |
| 721 | NULL, /* disabled_regsets */ |
| 722 | }; |
| 723 | |
| 724 | static struct regs_info regs_info_3264 = |
| 725 | { |
| 726 | NULL, /* regset_bitmap */ |
| 727 | &s390_usrregs_info_3264, |
| 728 | &s390_regsets_info_3264 |
| 729 | }; |
| 730 | |
| 731 | static const struct regs_info * |
| 732 | s390_regs_info (void) |
| 733 | { |
| 734 | if (have_hwcap_s390_high_gprs) |
| 735 | { |
| 736 | #ifdef __s390x__ |
| 737 | const struct target_desc *tdesc = current_process ()->tdesc; |
| 738 | |
| 739 | if (register_size (tdesc, 0) == 4) |
| 740 | return ®s_info_3264; |
| 741 | #else |
| 742 | return ®s_info_3264; |
| 743 | #endif |
| 744 | } |
| 745 | return ®s_info; |
| 746 | } |
| 747 | |
| 748 | /* The "supports_tracepoints" linux_target_ops method. */ |
| 749 | |
| 750 | static int |
| 751 | s390_supports_tracepoints (void) |
| 752 | { |
| 753 | return 1; |
| 754 | } |
| 755 | |
| 756 | struct linux_target_ops the_low_target = { |
| 757 | s390_arch_setup, |
| 758 | s390_regs_info, |
| 759 | s390_cannot_fetch_register, |
| 760 | s390_cannot_store_register, |
| 761 | NULL, /* fetch_register */ |
| 762 | s390_get_pc, |
| 763 | s390_set_pc, |
| 764 | NULL, /* breakpoint_kind_from_pc */ |
| 765 | s390_sw_breakpoint_from_kind, |
| 766 | NULL, |
| 767 | s390_breakpoint_len, |
| 768 | s390_breakpoint_at, |
| 769 | s390_supports_z_point_type, |
| 770 | NULL, |
| 771 | NULL, |
| 772 | NULL, |
| 773 | NULL, |
| 774 | s390_collect_ptrace_register, |
| 775 | s390_supply_ptrace_register, |
| 776 | NULL, /* siginfo_fixup */ |
| 777 | NULL, /* new_process */ |
| 778 | NULL, /* new_thread */ |
| 779 | NULL, /* new_fork */ |
| 780 | NULL, /* prepare_to_resume */ |
| 781 | NULL, /* process_qsupported */ |
| 782 | s390_supports_tracepoints, |
| 783 | NULL, /* get_thread_area */ |
| 784 | NULL, /* install_fast_tracepoint_jump_pad */ |
| 785 | NULL, /* emit_ops */ |
| 786 | NULL, /* get_min_fast_tracepoint_insn_len */ |
| 787 | NULL, /* supports_range_stepping */ |
| 788 | NULL, /* breakpoint_kind_from_current_state */ |
| 789 | s390_supports_hardware_single_step, |
| 790 | }; |
| 791 | |
| 792 | void |
| 793 | initialize_low_arch (void) |
| 794 | { |
| 795 | /* Initialize the Linux target descriptions. */ |
| 796 | |
| 797 | init_registers_s390_linux32 (); |
| 798 | init_registers_s390_linux32v1 (); |
| 799 | init_registers_s390_linux32v2 (); |
| 800 | init_registers_s390_linux64 (); |
| 801 | init_registers_s390_linux64v1 (); |
| 802 | init_registers_s390_linux64v2 (); |
| 803 | init_registers_s390_te_linux64 (); |
| 804 | init_registers_s390_vx_linux64 (); |
| 805 | init_registers_s390_tevx_linux64 (); |
| 806 | init_registers_s390x_linux64 (); |
| 807 | init_registers_s390x_linux64v1 (); |
| 808 | init_registers_s390x_linux64v2 (); |
| 809 | init_registers_s390x_te_linux64 (); |
| 810 | init_registers_s390x_vx_linux64 (); |
| 811 | init_registers_s390x_tevx_linux64 (); |
| 812 | |
| 813 | initialize_regsets_info (&s390_regsets_info); |
| 814 | initialize_regsets_info (&s390_regsets_info_3264); |
| 815 | } |