| 1 | /* Target-dependent code for GNU/Linux on s390. |
| 2 | |
| 3 | Copyright (C) 2001-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
| 6 | for IBM Deutschland Entwicklung GmbH, IBM Corporation. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | |
| 25 | #include "auxv.h" |
| 26 | #include "elf/common.h" |
| 27 | #include "frame-base.h" |
| 28 | #include "frame-unwind.h" |
| 29 | #include "gdbarch.h" |
| 30 | #include "gdbcore.h" |
| 31 | #include "linux-record.h" |
| 32 | #include "linux-tdep.h" |
| 33 | #include "objfiles.h" |
| 34 | #include "osabi.h" |
| 35 | #include "regcache.h" |
| 36 | #include "record-full.h" |
| 37 | #include "regset.h" |
| 38 | #include "s390-tdep.h" |
| 39 | #include "s390-linux-tdep.h" |
| 40 | #include "solib-svr4.h" |
| 41 | #include "target.h" |
| 42 | #include "trad-frame.h" |
| 43 | #include "xml-syscall.h" |
| 44 | |
| 45 | #include "features/s390-linux32v1.c" |
| 46 | #include "features/s390-linux32v2.c" |
| 47 | #include "features/s390-linux64.c" |
| 48 | #include "features/s390-linux64v1.c" |
| 49 | #include "features/s390-linux64v2.c" |
| 50 | #include "features/s390-te-linux64.c" |
| 51 | #include "features/s390-vx-linux64.c" |
| 52 | #include "features/s390-tevx-linux64.c" |
| 53 | #include "features/s390-gs-linux64.c" |
| 54 | #include "features/s390x-linux64v1.c" |
| 55 | #include "features/s390x-linux64v2.c" |
| 56 | #include "features/s390x-te-linux64.c" |
| 57 | #include "features/s390x-vx-linux64.c" |
| 58 | #include "features/s390x-tevx-linux64.c" |
| 59 | #include "features/s390x-gs-linux64.c" |
| 60 | |
| 61 | #define XML_SYSCALL_FILENAME_S390 "syscalls/s390-linux.xml" |
| 62 | #define XML_SYSCALL_FILENAME_S390X "syscalls/s390x-linux.xml" |
| 63 | |
| 64 | |
| 65 | /* Register handling. */ |
| 66 | |
| 67 | /* Implement cannot_store_register gdbarch method. */ |
| 68 | |
| 69 | static int |
| 70 | s390_cannot_store_register (struct gdbarch *gdbarch, int regnum) |
| 71 | { |
| 72 | /* The last-break address is read-only. */ |
| 73 | return regnum == S390_LAST_BREAK_REGNUM; |
| 74 | } |
| 75 | |
| 76 | /* Implement write_pc gdbarch method. */ |
| 77 | |
| 78 | static void |
| 79 | s390_write_pc (struct regcache *regcache, CORE_ADDR pc) |
| 80 | { |
| 81 | struct gdbarch *gdbarch = regcache->arch (); |
| 82 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 83 | |
| 84 | regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc); |
| 85 | |
| 86 | /* Set special SYSTEM_CALL register to 0 to prevent the kernel from |
| 87 | messing with the PC we just installed, if we happen to be within |
| 88 | an interrupted system call that the kernel wants to restart. |
| 89 | |
| 90 | Note that after we return from the dummy call, the SYSTEM_CALL and |
| 91 | ORIG_R2 registers will be automatically restored, and the kernel |
| 92 | continues to restart the system call at this point. */ |
| 93 | if (register_size (gdbarch, S390_SYSTEM_CALL_REGNUM) > 0) |
| 94 | regcache_cooked_write_unsigned (regcache, S390_SYSTEM_CALL_REGNUM, 0); |
| 95 | } |
| 96 | |
| 97 | /* Maps for register sets. */ |
| 98 | |
| 99 | static const struct regcache_map_entry s390_gregmap[] = |
| 100 | { |
| 101 | { 1, S390_PSWM_REGNUM }, |
| 102 | { 1, S390_PSWA_REGNUM }, |
| 103 | { 16, S390_R0_REGNUM }, |
| 104 | { 16, S390_A0_REGNUM }, |
| 105 | { 1, S390_ORIG_R2_REGNUM }, |
| 106 | { 0 } |
| 107 | }; |
| 108 | |
| 109 | static const struct regcache_map_entry s390_fpregmap[] = |
| 110 | { |
| 111 | { 1, S390_FPC_REGNUM, 8 }, |
| 112 | { 16, S390_F0_REGNUM, 8 }, |
| 113 | { 0 } |
| 114 | }; |
| 115 | |
| 116 | static const struct regcache_map_entry s390_regmap_upper[] = |
| 117 | { |
| 118 | { 16, S390_R0_UPPER_REGNUM, 4 }, |
| 119 | { 0 } |
| 120 | }; |
| 121 | |
| 122 | static const struct regcache_map_entry s390_regmap_last_break[] = |
| 123 | { |
| 124 | { 1, REGCACHE_MAP_SKIP, 4 }, |
| 125 | { 1, S390_LAST_BREAK_REGNUM, 4 }, |
| 126 | { 0 } |
| 127 | }; |
| 128 | |
| 129 | static const struct regcache_map_entry s390x_regmap_last_break[] = |
| 130 | { |
| 131 | { 1, S390_LAST_BREAK_REGNUM, 8 }, |
| 132 | { 0 } |
| 133 | }; |
| 134 | |
| 135 | static const struct regcache_map_entry s390_regmap_system_call[] = |
| 136 | { |
| 137 | { 1, S390_SYSTEM_CALL_REGNUM, 4 }, |
| 138 | { 0 } |
| 139 | }; |
| 140 | |
| 141 | static const struct regcache_map_entry s390_regmap_tdb[] = |
| 142 | { |
| 143 | { 1, S390_TDB_DWORD0_REGNUM, 8 }, |
| 144 | { 1, S390_TDB_ABORT_CODE_REGNUM, 8 }, |
| 145 | { 1, S390_TDB_CONFLICT_TOKEN_REGNUM, 8 }, |
| 146 | { 1, S390_TDB_ATIA_REGNUM, 8 }, |
| 147 | { 12, REGCACHE_MAP_SKIP, 8 }, |
| 148 | { 16, S390_TDB_R0_REGNUM, 8 }, |
| 149 | { 0 } |
| 150 | }; |
| 151 | |
| 152 | static const struct regcache_map_entry s390_regmap_vxrs_low[] = |
| 153 | { |
| 154 | { 16, S390_V0_LOWER_REGNUM, 8 }, |
| 155 | { 0 } |
| 156 | }; |
| 157 | |
| 158 | static const struct regcache_map_entry s390_regmap_vxrs_high[] = |
| 159 | { |
| 160 | { 16, S390_V16_REGNUM, 16 }, |
| 161 | { 0 } |
| 162 | }; |
| 163 | |
| 164 | static const struct regcache_map_entry s390_regmap_gs[] = |
| 165 | { |
| 166 | { 1, REGCACHE_MAP_SKIP, 8 }, |
| 167 | { 1, S390_GSD_REGNUM, 8 }, |
| 168 | { 1, S390_GSSM_REGNUM, 8 }, |
| 169 | { 1, S390_GSEPLA_REGNUM, 8 }, |
| 170 | { 0 } |
| 171 | }; |
| 172 | |
| 173 | static const struct regcache_map_entry s390_regmap_gsbc[] = |
| 174 | { |
| 175 | { 1, REGCACHE_MAP_SKIP, 8 }, |
| 176 | { 1, S390_BC_GSD_REGNUM, 8 }, |
| 177 | { 1, S390_BC_GSSM_REGNUM, 8 }, |
| 178 | { 1, S390_BC_GSEPLA_REGNUM, 8 }, |
| 179 | { 0 } |
| 180 | }; |
| 181 | |
| 182 | /* Supply the TDB regset. Like regcache_supply_regset, but invalidate |
| 183 | the TDB registers unless the TDB format field is valid. */ |
| 184 | |
| 185 | static void |
| 186 | s390_supply_tdb_regset (const struct regset *regset, struct regcache *regcache, |
| 187 | int regnum, const void *regs, size_t len) |
| 188 | { |
| 189 | ULONGEST tdw; |
| 190 | enum register_status ret; |
| 191 | |
| 192 | regcache_supply_regset (regset, regcache, regnum, regs, len); |
| 193 | ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw); |
| 194 | if (ret != REG_VALID || (tdw >> 56) != 1) |
| 195 | regcache_supply_regset (regset, regcache, regnum, NULL, len); |
| 196 | } |
| 197 | |
| 198 | const struct regset s390_gregset = { |
| 199 | s390_gregmap, |
| 200 | regcache_supply_regset, |
| 201 | regcache_collect_regset |
| 202 | }; |
| 203 | |
| 204 | const struct regset s390_fpregset = { |
| 205 | s390_fpregmap, |
| 206 | regcache_supply_regset, |
| 207 | regcache_collect_regset |
| 208 | }; |
| 209 | |
| 210 | static const struct regset s390_upper_regset = { |
| 211 | s390_regmap_upper, |
| 212 | regcache_supply_regset, |
| 213 | regcache_collect_regset |
| 214 | }; |
| 215 | |
| 216 | const struct regset s390_last_break_regset = { |
| 217 | s390_regmap_last_break, |
| 218 | regcache_supply_regset, |
| 219 | regcache_collect_regset |
| 220 | }; |
| 221 | |
| 222 | const struct regset s390x_last_break_regset = { |
| 223 | s390x_regmap_last_break, |
| 224 | regcache_supply_regset, |
| 225 | regcache_collect_regset |
| 226 | }; |
| 227 | |
| 228 | const struct regset s390_system_call_regset = { |
| 229 | s390_regmap_system_call, |
| 230 | regcache_supply_regset, |
| 231 | regcache_collect_regset |
| 232 | }; |
| 233 | |
| 234 | const struct regset s390_tdb_regset = { |
| 235 | s390_regmap_tdb, |
| 236 | s390_supply_tdb_regset, |
| 237 | regcache_collect_regset |
| 238 | }; |
| 239 | |
| 240 | const struct regset s390_vxrs_low_regset = { |
| 241 | s390_regmap_vxrs_low, |
| 242 | regcache_supply_regset, |
| 243 | regcache_collect_regset |
| 244 | }; |
| 245 | |
| 246 | const struct regset s390_vxrs_high_regset = { |
| 247 | s390_regmap_vxrs_high, |
| 248 | regcache_supply_regset, |
| 249 | regcache_collect_regset |
| 250 | }; |
| 251 | |
| 252 | const struct regset s390_gs_regset = { |
| 253 | s390_regmap_gs, |
| 254 | regcache_supply_regset, |
| 255 | regcache_collect_regset |
| 256 | }; |
| 257 | |
| 258 | const struct regset s390_gsbc_regset = { |
| 259 | s390_regmap_gsbc, |
| 260 | regcache_supply_regset, |
| 261 | regcache_collect_regset |
| 262 | }; |
| 263 | |
| 264 | /* Iterate over supported core file register note sections. */ |
| 265 | |
| 266 | static void |
| 267 | s390_iterate_over_regset_sections (struct gdbarch *gdbarch, |
| 268 | iterate_over_regset_sections_cb *cb, |
| 269 | void *cb_data, |
| 270 | const struct regcache *regcache) |
| 271 | { |
| 272 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 273 | const int gregset_size = (tdep->abi == ABI_LINUX_S390 ? |
| 274 | s390_sizeof_gregset : s390x_sizeof_gregset); |
| 275 | |
| 276 | cb (".reg", gregset_size, gregset_size, &s390_gregset, NULL, cb_data); |
| 277 | cb (".reg2", s390_sizeof_fpregset, s390_sizeof_fpregset, &s390_fpregset, NULL, |
| 278 | cb_data); |
| 279 | |
| 280 | if (tdep->abi == ABI_LINUX_S390 && tdep->gpr_full_regnum != -1) |
| 281 | cb (".reg-s390-high-gprs", 16 * 4, 16 * 4, &s390_upper_regset, |
| 282 | "s390 GPR upper halves", cb_data); |
| 283 | |
| 284 | if (tdep->have_linux_v1) |
| 285 | cb (".reg-s390-last-break", 8, 8, |
| 286 | (gdbarch_ptr_bit (gdbarch) == 32 |
| 287 | ? &s390_last_break_regset : &s390x_last_break_regset), |
| 288 | "s390 last-break address", cb_data); |
| 289 | |
| 290 | if (tdep->have_linux_v2) |
| 291 | cb (".reg-s390-system-call", 4, 4, &s390_system_call_regset, |
| 292 | "s390 system-call", cb_data); |
| 293 | |
| 294 | /* If regcache is set, we are in "write" (gcore) mode. In this |
| 295 | case, don't iterate over the TDB unless its registers are |
| 296 | available. */ |
| 297 | if (tdep->have_tdb |
| 298 | && (regcache == NULL |
| 299 | || (REG_VALID |
| 300 | == regcache->get_register_status (S390_TDB_DWORD0_REGNUM)))) |
| 301 | cb (".reg-s390-tdb", s390_sizeof_tdbregset, s390_sizeof_tdbregset, |
| 302 | &s390_tdb_regset, "s390 TDB", cb_data); |
| 303 | |
| 304 | if (tdep->v0_full_regnum != -1) |
| 305 | { |
| 306 | cb (".reg-s390-vxrs-low", 16 * 8, 16 * 8, &s390_vxrs_low_regset, |
| 307 | "s390 vector registers 0-15 lower half", cb_data); |
| 308 | cb (".reg-s390-vxrs-high", 16 * 16, 16 * 16, &s390_vxrs_high_regset, |
| 309 | "s390 vector registers 16-31", cb_data); |
| 310 | } |
| 311 | |
| 312 | /* Iterate over the guarded-storage regsets if in "read" mode, or if |
| 313 | their registers are available. */ |
| 314 | if (tdep->have_gs) |
| 315 | { |
| 316 | if (regcache == NULL |
| 317 | || REG_VALID == regcache->get_register_status (S390_GSD_REGNUM)) |
| 318 | cb (".reg-s390-gs-cb", 4 * 8, 4 * 8, &s390_gs_regset, |
| 319 | "s390 guarded-storage registers", cb_data); |
| 320 | |
| 321 | if (regcache == NULL |
| 322 | || REG_VALID == regcache->get_register_status (S390_BC_GSD_REGNUM)) |
| 323 | cb (".reg-s390-gs-bc", 4 * 8, 4 * 8, &s390_gsbc_regset, |
| 324 | "s390 guarded-storage broadcast control", cb_data); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | /* Implement core_read_description gdbarch method. */ |
| 329 | |
| 330 | static const struct target_desc * |
| 331 | s390_core_read_description (struct gdbarch *gdbarch, |
| 332 | struct target_ops *target, bfd *abfd) |
| 333 | { |
| 334 | asection *section = bfd_get_section_by_name (abfd, ".reg"); |
| 335 | CORE_ADDR hwcap = linux_get_hwcap (target); |
| 336 | bool high_gprs, v1, v2, te, vx, gs; |
| 337 | |
| 338 | if (!section) |
| 339 | return NULL; |
| 340 | |
| 341 | high_gprs = (bfd_get_section_by_name (abfd, ".reg-s390-high-gprs") |
| 342 | != NULL); |
| 343 | v1 = (bfd_get_section_by_name (abfd, ".reg-s390-last-break") != NULL); |
| 344 | v2 = (bfd_get_section_by_name (abfd, ".reg-s390-system-call") != NULL); |
| 345 | vx = (hwcap & HWCAP_S390_VX); |
| 346 | te = (hwcap & HWCAP_S390_TE); |
| 347 | gs = (hwcap & HWCAP_S390_GS); |
| 348 | |
| 349 | switch (bfd_section_size (section)) |
| 350 | { |
| 351 | case s390_sizeof_gregset: |
| 352 | if (high_gprs) |
| 353 | return (gs ? tdesc_s390_gs_linux64 : |
| 354 | te && vx ? tdesc_s390_tevx_linux64 : |
| 355 | vx ? tdesc_s390_vx_linux64 : |
| 356 | te ? tdesc_s390_te_linux64 : |
| 357 | v2 ? tdesc_s390_linux64v2 : |
| 358 | v1 ? tdesc_s390_linux64v1 : tdesc_s390_linux64); |
| 359 | else |
| 360 | return (v2 ? tdesc_s390_linux32v2 : |
| 361 | v1 ? tdesc_s390_linux32v1 : tdesc_s390_linux32); |
| 362 | |
| 363 | case s390x_sizeof_gregset: |
| 364 | return (gs ? tdesc_s390x_gs_linux64 : |
| 365 | te && vx ? tdesc_s390x_tevx_linux64 : |
| 366 | vx ? tdesc_s390x_vx_linux64 : |
| 367 | te ? tdesc_s390x_te_linux64 : |
| 368 | v2 ? tdesc_s390x_linux64v2 : |
| 369 | v1 ? tdesc_s390x_linux64v1 : tdesc_s390x_linux64); |
| 370 | |
| 371 | default: |
| 372 | return NULL; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | /* Frame unwinding. */ |
| 377 | |
| 378 | /* Signal trampoline stack frames. */ |
| 379 | |
| 380 | struct s390_sigtramp_unwind_cache { |
| 381 | CORE_ADDR frame_base; |
| 382 | struct trad_frame_saved_reg *saved_regs; |
| 383 | }; |
| 384 | |
| 385 | /* Unwind THIS_FRAME and return the corresponding unwind cache for |
| 386 | s390_sigtramp_frame_unwind. */ |
| 387 | |
| 388 | static struct s390_sigtramp_unwind_cache * |
| 389 | s390_sigtramp_frame_unwind_cache (struct frame_info *this_frame, |
| 390 | void **this_prologue_cache) |
| 391 | { |
| 392 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 393 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 394 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
| 395 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 396 | struct s390_sigtramp_unwind_cache *info; |
| 397 | ULONGEST this_sp, prev_sp; |
| 398 | CORE_ADDR next_ra, next_cfa, sigreg_ptr, sigreg_high_off; |
| 399 | int i; |
| 400 | |
| 401 | if (*this_prologue_cache) |
| 402 | return (struct s390_sigtramp_unwind_cache *) *this_prologue_cache; |
| 403 | |
| 404 | info = FRAME_OBSTACK_ZALLOC (struct s390_sigtramp_unwind_cache); |
| 405 | *this_prologue_cache = info; |
| 406 | info->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
| 407 | |
| 408 | this_sp = get_frame_register_unsigned (this_frame, S390_SP_REGNUM); |
| 409 | next_ra = get_frame_pc (this_frame); |
| 410 | next_cfa = this_sp + 16*word_size + 32; |
| 411 | |
| 412 | /* New-style RT frame: |
| 413 | retcode + alignment (8 bytes) |
| 414 | siginfo (128 bytes) |
| 415 | ucontext (contains sigregs at offset 5 words). */ |
| 416 | if (next_ra == next_cfa) |
| 417 | { |
| 418 | sigreg_ptr = next_cfa + 8 + 128 + align_up (5*word_size, 8); |
| 419 | /* sigregs are followed by uc_sigmask (8 bytes), then by the |
| 420 | upper GPR halves if present. */ |
| 421 | sigreg_high_off = 8; |
| 422 | } |
| 423 | |
| 424 | /* Old-style RT frame and all non-RT frames: |
| 425 | old signal mask (8 bytes) |
| 426 | pointer to sigregs. */ |
| 427 | else |
| 428 | { |
| 429 | sigreg_ptr = read_memory_unsigned_integer (next_cfa + 8, |
| 430 | word_size, byte_order); |
| 431 | /* sigregs are followed by signo (4 bytes), then by the |
| 432 | upper GPR halves if present. */ |
| 433 | sigreg_high_off = 4; |
| 434 | } |
| 435 | |
| 436 | /* The sigregs structure looks like this: |
| 437 | long psw_mask; |
| 438 | long psw_addr; |
| 439 | long gprs[16]; |
| 440 | int acrs[16]; |
| 441 | int fpc; |
| 442 | int __pad; |
| 443 | double fprs[16]; */ |
| 444 | |
| 445 | /* PSW mask and address. */ |
| 446 | info->saved_regs[S390_PSWM_REGNUM].addr = sigreg_ptr; |
| 447 | sigreg_ptr += word_size; |
| 448 | info->saved_regs[S390_PSWA_REGNUM].addr = sigreg_ptr; |
| 449 | sigreg_ptr += word_size; |
| 450 | |
| 451 | /* Then the GPRs. */ |
| 452 | for (i = 0; i < 16; i++) |
| 453 | { |
| 454 | info->saved_regs[S390_R0_REGNUM + i].addr = sigreg_ptr; |
| 455 | sigreg_ptr += word_size; |
| 456 | } |
| 457 | |
| 458 | /* Then the ACRs. */ |
| 459 | for (i = 0; i < 16; i++) |
| 460 | { |
| 461 | info->saved_regs[S390_A0_REGNUM + i].addr = sigreg_ptr; |
| 462 | sigreg_ptr += 4; |
| 463 | } |
| 464 | |
| 465 | /* The floating-point control word. */ |
| 466 | info->saved_regs[S390_FPC_REGNUM].addr = sigreg_ptr; |
| 467 | sigreg_ptr += 8; |
| 468 | |
| 469 | /* And finally the FPRs. */ |
| 470 | for (i = 0; i < 16; i++) |
| 471 | { |
| 472 | info->saved_regs[S390_F0_REGNUM + i].addr = sigreg_ptr; |
| 473 | sigreg_ptr += 8; |
| 474 | } |
| 475 | |
| 476 | /* If we have them, the GPR upper halves are appended at the end. */ |
| 477 | sigreg_ptr += sigreg_high_off; |
| 478 | if (tdep->gpr_full_regnum != -1) |
| 479 | for (i = 0; i < 16; i++) |
| 480 | { |
| 481 | info->saved_regs[S390_R0_UPPER_REGNUM + i].addr = sigreg_ptr; |
| 482 | sigreg_ptr += 4; |
| 483 | } |
| 484 | |
| 485 | /* Restore the previous frame's SP. */ |
| 486 | prev_sp = read_memory_unsigned_integer ( |
| 487 | info->saved_regs[S390_SP_REGNUM].addr, |
| 488 | word_size, byte_order); |
| 489 | |
| 490 | /* Determine our frame base. */ |
| 491 | info->frame_base = prev_sp + 16*word_size + 32; |
| 492 | |
| 493 | return info; |
| 494 | } |
| 495 | |
| 496 | /* Implement this_id frame_unwind method for s390_sigtramp_frame_unwind. */ |
| 497 | |
| 498 | static void |
| 499 | s390_sigtramp_frame_this_id (struct frame_info *this_frame, |
| 500 | void **this_prologue_cache, |
| 501 | struct frame_id *this_id) |
| 502 | { |
| 503 | struct s390_sigtramp_unwind_cache *info |
| 504 | = s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache); |
| 505 | *this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame)); |
| 506 | } |
| 507 | |
| 508 | /* Implement prev_register frame_unwind method for sigtramp frames. */ |
| 509 | |
| 510 | static struct value * |
| 511 | s390_sigtramp_frame_prev_register (struct frame_info *this_frame, |
| 512 | void **this_prologue_cache, int regnum) |
| 513 | { |
| 514 | struct s390_sigtramp_unwind_cache *info |
| 515 | = s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache); |
| 516 | return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum); |
| 517 | } |
| 518 | |
| 519 | /* Implement sniffer frame_unwind method for sigtramp frames. */ |
| 520 | |
| 521 | static int |
| 522 | s390_sigtramp_frame_sniffer (const struct frame_unwind *self, |
| 523 | struct frame_info *this_frame, |
| 524 | void **this_prologue_cache) |
| 525 | { |
| 526 | CORE_ADDR pc = get_frame_pc (this_frame); |
| 527 | bfd_byte sigreturn[2]; |
| 528 | |
| 529 | if (target_read_memory (pc, sigreturn, 2)) |
| 530 | return 0; |
| 531 | |
| 532 | if (sigreturn[0] != op_svc) |
| 533 | return 0; |
| 534 | |
| 535 | if (sigreturn[1] != 119 /* sigreturn */ |
| 536 | && sigreturn[1] != 173 /* rt_sigreturn */) |
| 537 | return 0; |
| 538 | |
| 539 | return 1; |
| 540 | } |
| 541 | |
| 542 | /* S390 sigtramp frame unwinder. */ |
| 543 | |
| 544 | static const struct frame_unwind s390_sigtramp_frame_unwind = { |
| 545 | SIGTRAMP_FRAME, |
| 546 | default_frame_unwind_stop_reason, |
| 547 | s390_sigtramp_frame_this_id, |
| 548 | s390_sigtramp_frame_prev_register, |
| 549 | NULL, |
| 550 | s390_sigtramp_frame_sniffer |
| 551 | }; |
| 552 | |
| 553 | /* Syscall handling. */ |
| 554 | |
| 555 | /* Retrieve the syscall number at a ptrace syscall-stop. Return -1 |
| 556 | upon error. */ |
| 557 | |
| 558 | static LONGEST |
| 559 | s390_linux_get_syscall_number (struct gdbarch *gdbarch, |
| 560 | thread_info *thread) |
| 561 | { |
| 562 | struct regcache *regs = get_thread_regcache (thread); |
| 563 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 564 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 565 | ULONGEST pc; |
| 566 | ULONGEST svc_number = -1; |
| 567 | unsigned opcode; |
| 568 | |
| 569 | /* Assume that the PC points after the 2-byte SVC instruction. We |
| 570 | don't currently support SVC via EXECUTE. */ |
| 571 | regcache_cooked_read_unsigned (regs, tdep->pc_regnum, &pc); |
| 572 | pc -= 2; |
| 573 | opcode = read_memory_unsigned_integer ((CORE_ADDR) pc, 1, byte_order); |
| 574 | if (opcode != op_svc) |
| 575 | return -1; |
| 576 | |
| 577 | svc_number = read_memory_unsigned_integer ((CORE_ADDR) pc + 1, 1, |
| 578 | byte_order); |
| 579 | if (svc_number == 0) |
| 580 | regcache_cooked_read_unsigned (regs, S390_R1_REGNUM, &svc_number); |
| 581 | |
| 582 | return svc_number; |
| 583 | } |
| 584 | |
| 585 | /* Process record-replay */ |
| 586 | |
| 587 | static struct linux_record_tdep s390_linux_record_tdep; |
| 588 | static struct linux_record_tdep s390x_linux_record_tdep; |
| 589 | |
| 590 | /* Record all registers but PC register for process-record. */ |
| 591 | |
| 592 | static int |
| 593 | s390_all_but_pc_registers_record (struct regcache *regcache) |
| 594 | { |
| 595 | struct gdbarch *gdbarch = regcache->arch (); |
| 596 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 597 | int i; |
| 598 | |
| 599 | for (i = 0; i < 16; i++) |
| 600 | { |
| 601 | if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i)) |
| 602 | return -1; |
| 603 | if (record_full_arch_list_add_reg (regcache, S390_A0_REGNUM + i)) |
| 604 | return -1; |
| 605 | if (record_full_arch_list_add_reg (regcache, S390_F0_REGNUM + i)) |
| 606 | return -1; |
| 607 | if (tdep->gpr_full_regnum != -1) |
| 608 | if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i)) |
| 609 | return -1; |
| 610 | if (tdep->v0_full_regnum != -1) |
| 611 | { |
| 612 | if (record_full_arch_list_add_reg (regcache, S390_V0_LOWER_REGNUM + i)) |
| 613 | return -1; |
| 614 | if (record_full_arch_list_add_reg (regcache, S390_V16_REGNUM + i)) |
| 615 | return -1; |
| 616 | } |
| 617 | } |
| 618 | if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM)) |
| 619 | return -1; |
| 620 | if (record_full_arch_list_add_reg (regcache, S390_FPC_REGNUM)) |
| 621 | return -1; |
| 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | /* Canonicalize system call SYSCALL belonging to ABI. Helper for |
| 627 | s390_linux_syscall_record. */ |
| 628 | |
| 629 | static enum gdb_syscall |
| 630 | s390_canonicalize_syscall (int syscall, enum s390_abi_kind abi) |
| 631 | { |
| 632 | switch (syscall) |
| 633 | { |
| 634 | /* s390 syscall numbers < 222 are mostly the same as x86, so just list |
| 635 | the exceptions. */ |
| 636 | case 0: |
| 637 | return gdb_sys_no_syscall; |
| 638 | case 7: |
| 639 | return gdb_sys_restart_syscall; |
| 640 | /* These syscalls work only on 31-bit. */ |
| 641 | case 13: /* time */ |
| 642 | case 16: /* lchown[16] */ |
| 643 | case 23: /* setuid[16] */ |
| 644 | case 24: /* getuid[16] */ |
| 645 | case 25: /* stime */ |
| 646 | case 46: /* setgid[16] */ |
| 647 | case 47: /* getgid[16] */ |
| 648 | case 49: /* seteuid[16] */ |
| 649 | case 50: /* getegid[16] */ |
| 650 | case 70: /* setreuid[16] */ |
| 651 | case 71: /* setregid[16] */ |
| 652 | case 76: /* [old_]getrlimit */ |
| 653 | case 80: /* getgroups[16] */ |
| 654 | case 81: /* setgroups[16] */ |
| 655 | case 95: /* fchown[16] */ |
| 656 | case 101: /* ioperm */ |
| 657 | case 138: /* setfsuid[16] */ |
| 658 | case 139: /* setfsgid[16] */ |
| 659 | case 140: /* _llseek */ |
| 660 | case 164: /* setresuid[16] */ |
| 661 | case 165: /* getresuid[16] */ |
| 662 | case 170: /* setresgid[16] */ |
| 663 | case 171: /* getresgid[16] */ |
| 664 | case 182: /* chown[16] */ |
| 665 | case 192: /* mmap2 */ |
| 666 | case 193: /* truncate64 */ |
| 667 | case 194: /* ftruncate64 */ |
| 668 | case 195: /* stat64 */ |
| 669 | case 196: /* lstat64 */ |
| 670 | case 197: /* fstat64 */ |
| 671 | case 221: /* fcntl64 */ |
| 672 | if (abi == ABI_LINUX_S390) |
| 673 | return (enum gdb_syscall) syscall; |
| 674 | return gdb_sys_no_syscall; |
| 675 | /* These syscalls don't exist on s390. */ |
| 676 | case 17: /* break */ |
| 677 | case 18: /* oldstat */ |
| 678 | case 28: /* oldfstat */ |
| 679 | case 31: /* stty */ |
| 680 | case 32: /* gtty */ |
| 681 | case 35: /* ftime */ |
| 682 | case 44: /* prof */ |
| 683 | case 53: /* lock */ |
| 684 | case 56: /* mpx */ |
| 685 | case 58: /* ulimit */ |
| 686 | case 59: /* oldolduname */ |
| 687 | case 68: /* sgetmask */ |
| 688 | case 69: /* ssetmask */ |
| 689 | case 82: /* [old_]select */ |
| 690 | case 84: /* oldlstat */ |
| 691 | case 98: /* profil */ |
| 692 | case 109: /* olduname */ |
| 693 | case 113: /* vm86old */ |
| 694 | case 123: /* modify_ldt */ |
| 695 | case 166: /* vm86 */ |
| 696 | return gdb_sys_no_syscall; |
| 697 | case 110: |
| 698 | return gdb_sys_lookup_dcookie; |
| 699 | /* Here come the differences. */ |
| 700 | case 222: |
| 701 | return gdb_sys_readahead; |
| 702 | case 223: |
| 703 | if (abi == ABI_LINUX_S390) |
| 704 | return gdb_sys_sendfile64; |
| 705 | return gdb_sys_no_syscall; |
| 706 | /* 224-235 handled below */ |
| 707 | case 236: |
| 708 | return gdb_sys_gettid; |
| 709 | case 237: |
| 710 | return gdb_sys_tkill; |
| 711 | case 238: |
| 712 | return gdb_sys_futex; |
| 713 | case 239: |
| 714 | return gdb_sys_sched_setaffinity; |
| 715 | case 240: |
| 716 | return gdb_sys_sched_getaffinity; |
| 717 | case 241: |
| 718 | return gdb_sys_tgkill; |
| 719 | /* 242 reserved */ |
| 720 | case 243: |
| 721 | return gdb_sys_io_setup; |
| 722 | case 244: |
| 723 | return gdb_sys_io_destroy; |
| 724 | case 245: |
| 725 | return gdb_sys_io_getevents; |
| 726 | case 246: |
| 727 | return gdb_sys_io_submit; |
| 728 | case 247: |
| 729 | return gdb_sys_io_cancel; |
| 730 | case 248: |
| 731 | return gdb_sys_exit_group; |
| 732 | case 249: |
| 733 | return gdb_sys_epoll_create; |
| 734 | case 250: |
| 735 | return gdb_sys_epoll_ctl; |
| 736 | case 251: |
| 737 | return gdb_sys_epoll_wait; |
| 738 | case 252: |
| 739 | return gdb_sys_set_tid_address; |
| 740 | case 253: |
| 741 | return gdb_sys_fadvise64; |
| 742 | /* 254-262 handled below */ |
| 743 | /* 263 reserved */ |
| 744 | case 264: |
| 745 | if (abi == ABI_LINUX_S390) |
| 746 | return gdb_sys_fadvise64_64; |
| 747 | return gdb_sys_no_syscall; |
| 748 | case 265: |
| 749 | return gdb_sys_statfs64; |
| 750 | case 266: |
| 751 | return gdb_sys_fstatfs64; |
| 752 | case 267: |
| 753 | return gdb_sys_remap_file_pages; |
| 754 | /* 268-270 reserved */ |
| 755 | /* 271-277 handled below */ |
| 756 | case 278: |
| 757 | return gdb_sys_add_key; |
| 758 | case 279: |
| 759 | return gdb_sys_request_key; |
| 760 | case 280: |
| 761 | return gdb_sys_keyctl; |
| 762 | case 281: |
| 763 | return gdb_sys_waitid; |
| 764 | /* 282-312 handled below */ |
| 765 | case 293: |
| 766 | if (abi == ABI_LINUX_S390) |
| 767 | return gdb_sys_fstatat64; |
| 768 | return gdb_sys_newfstatat; |
| 769 | /* 313+ not yet supported */ |
| 770 | default: |
| 771 | { |
| 772 | int ret; |
| 773 | |
| 774 | /* Most "old" syscalls copied from i386. */ |
| 775 | if (syscall <= 221) |
| 776 | ret = syscall; |
| 777 | /* xattr syscalls. */ |
| 778 | else if (syscall >= 224 && syscall <= 235) |
| 779 | ret = syscall + 2; |
| 780 | /* timer syscalls. */ |
| 781 | else if (syscall >= 254 && syscall <= 262) |
| 782 | ret = syscall + 5; |
| 783 | /* mq_* and kexec_load */ |
| 784 | else if (syscall >= 271 && syscall <= 277) |
| 785 | ret = syscall + 6; |
| 786 | /* ioprio_set .. epoll_pwait */ |
| 787 | else if (syscall >= 282 && syscall <= 312) |
| 788 | ret = syscall + 7; |
| 789 | else |
| 790 | ret = gdb_sys_no_syscall; |
| 791 | |
| 792 | return (enum gdb_syscall) ret; |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | /* Record a system call. Returns 0 on success, -1 otherwise. |
| 798 | Helper function for s390_process_record. */ |
| 799 | |
| 800 | static int |
| 801 | s390_linux_syscall_record (struct regcache *regcache, LONGEST syscall_native) |
| 802 | { |
| 803 | struct gdbarch *gdbarch = regcache->arch (); |
| 804 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 805 | int ret; |
| 806 | enum gdb_syscall syscall_gdb; |
| 807 | |
| 808 | /* On s390, syscall number can be passed either as immediate field of svc |
| 809 | instruction, or in %r1 (with svc 0). */ |
| 810 | if (syscall_native == 0) |
| 811 | regcache_raw_read_signed (regcache, S390_R1_REGNUM, &syscall_native); |
| 812 | |
| 813 | syscall_gdb = s390_canonicalize_syscall (syscall_native, tdep->abi); |
| 814 | |
| 815 | if (syscall_gdb < 0) |
| 816 | { |
| 817 | printf_unfiltered (_("Process record and replay target doesn't " |
| 818 | "support syscall number %s\n"), |
| 819 | plongest (syscall_native)); |
| 820 | return -1; |
| 821 | } |
| 822 | |
| 823 | if (syscall_gdb == gdb_sys_sigreturn |
| 824 | || syscall_gdb == gdb_sys_rt_sigreturn) |
| 825 | { |
| 826 | if (s390_all_but_pc_registers_record (regcache)) |
| 827 | return -1; |
| 828 | return 0; |
| 829 | } |
| 830 | |
| 831 | if (tdep->abi == ABI_LINUX_ZSERIES) |
| 832 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 833 | &s390x_linux_record_tdep); |
| 834 | else |
| 835 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 836 | &s390_linux_record_tdep); |
| 837 | |
| 838 | if (ret) |
| 839 | return ret; |
| 840 | |
| 841 | /* Record the return value of the system call. */ |
| 842 | if (record_full_arch_list_add_reg (regcache, S390_R2_REGNUM)) |
| 843 | return -1; |
| 844 | |
| 845 | return 0; |
| 846 | } |
| 847 | |
| 848 | /* Implement process_record_signal gdbarch method. */ |
| 849 | |
| 850 | static int |
| 851 | s390_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache, |
| 852 | enum gdb_signal signal) |
| 853 | { |
| 854 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 855 | /* There are two kinds of signal frames on s390. rt_sigframe is always |
| 856 | the larger one, so don't even bother with sigframe. */ |
| 857 | const int sizeof_rt_sigframe = (tdep->abi == ABI_LINUX_ZSERIES ? |
| 858 | 160 + 8 + 128 + 1024 : 96 + 8 + 128 + 1000); |
| 859 | ULONGEST sp; |
| 860 | int i; |
| 861 | |
| 862 | for (i = 0; i < 16; i++) |
| 863 | { |
| 864 | if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i)) |
| 865 | return -1; |
| 866 | if (tdep->gpr_full_regnum != -1) |
| 867 | if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i)) |
| 868 | return -1; |
| 869 | } |
| 870 | if (record_full_arch_list_add_reg (regcache, S390_PSWA_REGNUM)) |
| 871 | return -1; |
| 872 | if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM)) |
| 873 | return -1; |
| 874 | |
| 875 | /* Record the change in the stack. |
| 876 | frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */ |
| 877 | regcache_raw_read_unsigned (regcache, S390_SP_REGNUM, &sp); |
| 878 | sp -= sizeof_rt_sigframe; |
| 879 | |
| 880 | if (record_full_arch_list_add_mem (sp, sizeof_rt_sigframe)) |
| 881 | return -1; |
| 882 | |
| 883 | if (record_full_arch_list_add_end ()) |
| 884 | return -1; |
| 885 | |
| 886 | return 0; |
| 887 | } |
| 888 | |
| 889 | /* Initialize linux_record_tdep if not initialized yet. */ |
| 890 | |
| 891 | static void |
| 892 | s390_init_linux_record_tdep (struct linux_record_tdep *record_tdep, |
| 893 | enum s390_abi_kind abi) |
| 894 | { |
| 895 | /* These values are the size of the type that will be used in a system |
| 896 | call. They are obtained from Linux Kernel source. */ |
| 897 | |
| 898 | if (abi == ABI_LINUX_ZSERIES) |
| 899 | { |
| 900 | record_tdep->size_pointer = 8; |
| 901 | /* no _old_kernel_stat */ |
| 902 | record_tdep->size_tms = 32; |
| 903 | record_tdep->size_loff_t = 8; |
| 904 | record_tdep->size_flock = 32; |
| 905 | record_tdep->size_ustat = 32; |
| 906 | record_tdep->size_old_sigaction = 32; |
| 907 | record_tdep->size_old_sigset_t = 8; |
| 908 | record_tdep->size_rlimit = 16; |
| 909 | record_tdep->size_rusage = 144; |
| 910 | record_tdep->size_timeval = 16; |
| 911 | record_tdep->size_timezone = 8; |
| 912 | /* old_[ug]id_t never used */ |
| 913 | record_tdep->size_fd_set = 128; |
| 914 | record_tdep->size_old_dirent = 280; |
| 915 | record_tdep->size_statfs = 88; |
| 916 | record_tdep->size_statfs64 = 88; |
| 917 | record_tdep->size_sockaddr = 16; |
| 918 | record_tdep->size_int = 4; |
| 919 | record_tdep->size_long = 8; |
| 920 | record_tdep->size_ulong = 8; |
| 921 | record_tdep->size_msghdr = 56; |
| 922 | record_tdep->size_itimerval = 32; |
| 923 | record_tdep->size_stat = 144; |
| 924 | /* old_utsname unused */ |
| 925 | record_tdep->size_sysinfo = 112; |
| 926 | record_tdep->size_msqid_ds = 120; |
| 927 | record_tdep->size_shmid_ds = 112; |
| 928 | record_tdep->size_new_utsname = 390; |
| 929 | record_tdep->size_timex = 208; |
| 930 | record_tdep->size_mem_dqinfo = 24; |
| 931 | record_tdep->size_if_dqblk = 72; |
| 932 | record_tdep->size_fs_quota_stat = 80; |
| 933 | record_tdep->size_timespec = 16; |
| 934 | record_tdep->size_pollfd = 8; |
| 935 | record_tdep->size_NFS_FHSIZE = 32; |
| 936 | record_tdep->size_knfsd_fh = 132; |
| 937 | record_tdep->size_TASK_COMM_LEN = 16; |
| 938 | record_tdep->size_sigaction = 32; |
| 939 | record_tdep->size_sigset_t = 8; |
| 940 | record_tdep->size_siginfo_t = 128; |
| 941 | record_tdep->size_cap_user_data_t = 12; |
| 942 | record_tdep->size_stack_t = 24; |
| 943 | record_tdep->size_off_t = 8; |
| 944 | /* stat64 unused */ |
| 945 | record_tdep->size_gid_t = 4; |
| 946 | record_tdep->size_uid_t = 4; |
| 947 | record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */ |
| 948 | record_tdep->size_flock64 = 32; |
| 949 | record_tdep->size_io_event = 32; |
| 950 | record_tdep->size_iocb = 64; |
| 951 | record_tdep->size_epoll_event = 16; |
| 952 | record_tdep->size_itimerspec = 32; |
| 953 | record_tdep->size_mq_attr = 64; |
| 954 | record_tdep->size_termios = 36; |
| 955 | record_tdep->size_termios2 = 44; |
| 956 | record_tdep->size_pid_t = 4; |
| 957 | record_tdep->size_winsize = 8; |
| 958 | record_tdep->size_serial_struct = 72; |
| 959 | record_tdep->size_serial_icounter_struct = 80; |
| 960 | record_tdep->size_size_t = 8; |
| 961 | record_tdep->size_iovec = 16; |
| 962 | record_tdep->size_time_t = 8; |
| 963 | } |
| 964 | else if (abi == ABI_LINUX_S390) |
| 965 | { |
| 966 | record_tdep->size_pointer = 4; |
| 967 | record_tdep->size__old_kernel_stat = 32; |
| 968 | record_tdep->size_tms = 16; |
| 969 | record_tdep->size_loff_t = 8; |
| 970 | record_tdep->size_flock = 16; |
| 971 | record_tdep->size_ustat = 20; |
| 972 | record_tdep->size_old_sigaction = 16; |
| 973 | record_tdep->size_old_sigset_t = 4; |
| 974 | record_tdep->size_rlimit = 8; |
| 975 | record_tdep->size_rusage = 72; |
| 976 | record_tdep->size_timeval = 8; |
| 977 | record_tdep->size_timezone = 8; |
| 978 | record_tdep->size_old_gid_t = 2; |
| 979 | record_tdep->size_old_uid_t = 2; |
| 980 | record_tdep->size_fd_set = 128; |
| 981 | record_tdep->size_old_dirent = 268; |
| 982 | record_tdep->size_statfs = 64; |
| 983 | record_tdep->size_statfs64 = 88; |
| 984 | record_tdep->size_sockaddr = 16; |
| 985 | record_tdep->size_int = 4; |
| 986 | record_tdep->size_long = 4; |
| 987 | record_tdep->size_ulong = 4; |
| 988 | record_tdep->size_msghdr = 28; |
| 989 | record_tdep->size_itimerval = 16; |
| 990 | record_tdep->size_stat = 64; |
| 991 | /* old_utsname unused */ |
| 992 | record_tdep->size_sysinfo = 64; |
| 993 | record_tdep->size_msqid_ds = 88; |
| 994 | record_tdep->size_shmid_ds = 84; |
| 995 | record_tdep->size_new_utsname = 390; |
| 996 | record_tdep->size_timex = 128; |
| 997 | record_tdep->size_mem_dqinfo = 24; |
| 998 | record_tdep->size_if_dqblk = 72; |
| 999 | record_tdep->size_fs_quota_stat = 80; |
| 1000 | record_tdep->size_timespec = 8; |
| 1001 | record_tdep->size_pollfd = 8; |
| 1002 | record_tdep->size_NFS_FHSIZE = 32; |
| 1003 | record_tdep->size_knfsd_fh = 132; |
| 1004 | record_tdep->size_TASK_COMM_LEN = 16; |
| 1005 | record_tdep->size_sigaction = 20; |
| 1006 | record_tdep->size_sigset_t = 8; |
| 1007 | record_tdep->size_siginfo_t = 128; |
| 1008 | record_tdep->size_cap_user_data_t = 12; |
| 1009 | record_tdep->size_stack_t = 12; |
| 1010 | record_tdep->size_off_t = 4; |
| 1011 | record_tdep->size_stat64 = 104; |
| 1012 | record_tdep->size_gid_t = 4; |
| 1013 | record_tdep->size_uid_t = 4; |
| 1014 | record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */ |
| 1015 | record_tdep->size_flock64 = 32; |
| 1016 | record_tdep->size_io_event = 32; |
| 1017 | record_tdep->size_iocb = 64; |
| 1018 | record_tdep->size_epoll_event = 16; |
| 1019 | record_tdep->size_itimerspec = 16; |
| 1020 | record_tdep->size_mq_attr = 32; |
| 1021 | record_tdep->size_termios = 36; |
| 1022 | record_tdep->size_termios2 = 44; |
| 1023 | record_tdep->size_pid_t = 4; |
| 1024 | record_tdep->size_winsize = 8; |
| 1025 | record_tdep->size_serial_struct = 60; |
| 1026 | record_tdep->size_serial_icounter_struct = 80; |
| 1027 | record_tdep->size_size_t = 4; |
| 1028 | record_tdep->size_iovec = 8; |
| 1029 | record_tdep->size_time_t = 4; |
| 1030 | } |
| 1031 | |
| 1032 | /* These values are the second argument of system call "sys_fcntl" |
| 1033 | and "sys_fcntl64". They are obtained from Linux Kernel source. */ |
| 1034 | record_tdep->fcntl_F_GETLK = 5; |
| 1035 | record_tdep->fcntl_F_GETLK64 = 12; |
| 1036 | record_tdep->fcntl_F_SETLK64 = 13; |
| 1037 | record_tdep->fcntl_F_SETLKW64 = 14; |
| 1038 | |
| 1039 | record_tdep->arg1 = S390_R2_REGNUM; |
| 1040 | record_tdep->arg2 = S390_R3_REGNUM; |
| 1041 | record_tdep->arg3 = S390_R4_REGNUM; |
| 1042 | record_tdep->arg4 = S390_R5_REGNUM; |
| 1043 | record_tdep->arg5 = S390_R6_REGNUM; |
| 1044 | |
| 1045 | /* These values are the second argument of system call "sys_ioctl". |
| 1046 | They are obtained from Linux Kernel source. |
| 1047 | See arch/s390/include/uapi/asm/ioctls.h. */ |
| 1048 | |
| 1049 | record_tdep->ioctl_TCGETS = 0x5401; |
| 1050 | record_tdep->ioctl_TCSETS = 0x5402; |
| 1051 | record_tdep->ioctl_TCSETSW = 0x5403; |
| 1052 | record_tdep->ioctl_TCSETSF = 0x5404; |
| 1053 | record_tdep->ioctl_TCGETA = 0x5405; |
| 1054 | record_tdep->ioctl_TCSETA = 0x5406; |
| 1055 | record_tdep->ioctl_TCSETAW = 0x5407; |
| 1056 | record_tdep->ioctl_TCSETAF = 0x5408; |
| 1057 | record_tdep->ioctl_TCSBRK = 0x5409; |
| 1058 | record_tdep->ioctl_TCXONC = 0x540a; |
| 1059 | record_tdep->ioctl_TCFLSH = 0x540b; |
| 1060 | record_tdep->ioctl_TIOCEXCL = 0x540c; |
| 1061 | record_tdep->ioctl_TIOCNXCL = 0x540d; |
| 1062 | record_tdep->ioctl_TIOCSCTTY = 0x540e; |
| 1063 | record_tdep->ioctl_TIOCGPGRP = 0x540f; |
| 1064 | record_tdep->ioctl_TIOCSPGRP = 0x5410; |
| 1065 | record_tdep->ioctl_TIOCOUTQ = 0x5411; |
| 1066 | record_tdep->ioctl_TIOCSTI = 0x5412; |
| 1067 | record_tdep->ioctl_TIOCGWINSZ = 0x5413; |
| 1068 | record_tdep->ioctl_TIOCSWINSZ = 0x5414; |
| 1069 | record_tdep->ioctl_TIOCMGET = 0x5415; |
| 1070 | record_tdep->ioctl_TIOCMBIS = 0x5416; |
| 1071 | record_tdep->ioctl_TIOCMBIC = 0x5417; |
| 1072 | record_tdep->ioctl_TIOCMSET = 0x5418; |
| 1073 | record_tdep->ioctl_TIOCGSOFTCAR = 0x5419; |
| 1074 | record_tdep->ioctl_TIOCSSOFTCAR = 0x541a; |
| 1075 | record_tdep->ioctl_FIONREAD = 0x541b; |
| 1076 | record_tdep->ioctl_TIOCINQ = 0x541b; /* alias */ |
| 1077 | record_tdep->ioctl_TIOCLINUX = 0x541c; |
| 1078 | record_tdep->ioctl_TIOCCONS = 0x541d; |
| 1079 | record_tdep->ioctl_TIOCGSERIAL = 0x541e; |
| 1080 | record_tdep->ioctl_TIOCSSERIAL = 0x541f; |
| 1081 | record_tdep->ioctl_TIOCPKT = 0x5420; |
| 1082 | record_tdep->ioctl_FIONBIO = 0x5421; |
| 1083 | record_tdep->ioctl_TIOCNOTTY = 0x5422; |
| 1084 | record_tdep->ioctl_TIOCSETD = 0x5423; |
| 1085 | record_tdep->ioctl_TIOCGETD = 0x5424; |
| 1086 | record_tdep->ioctl_TCSBRKP = 0x5425; |
| 1087 | record_tdep->ioctl_TIOCSBRK = 0x5427; |
| 1088 | record_tdep->ioctl_TIOCCBRK = 0x5428; |
| 1089 | record_tdep->ioctl_TIOCGSID = 0x5429; |
| 1090 | record_tdep->ioctl_TCGETS2 = 0x802c542a; |
| 1091 | record_tdep->ioctl_TCSETS2 = 0x402c542b; |
| 1092 | record_tdep->ioctl_TCSETSW2 = 0x402c542c; |
| 1093 | record_tdep->ioctl_TCSETSF2 = 0x402c542d; |
| 1094 | record_tdep->ioctl_TIOCGPTN = 0x80045430; |
| 1095 | record_tdep->ioctl_TIOCSPTLCK = 0x40045431; |
| 1096 | record_tdep->ioctl_FIONCLEX = 0x5450; |
| 1097 | record_tdep->ioctl_FIOCLEX = 0x5451; |
| 1098 | record_tdep->ioctl_FIOASYNC = 0x5452; |
| 1099 | record_tdep->ioctl_TIOCSERCONFIG = 0x5453; |
| 1100 | record_tdep->ioctl_TIOCSERGWILD = 0x5454; |
| 1101 | record_tdep->ioctl_TIOCSERSWILD = 0x5455; |
| 1102 | record_tdep->ioctl_TIOCGLCKTRMIOS = 0x5456; |
| 1103 | record_tdep->ioctl_TIOCSLCKTRMIOS = 0x5457; |
| 1104 | record_tdep->ioctl_TIOCSERGSTRUCT = 0x5458; |
| 1105 | record_tdep->ioctl_TIOCSERGETLSR = 0x5459; |
| 1106 | record_tdep->ioctl_TIOCSERGETMULTI = 0x545a; |
| 1107 | record_tdep->ioctl_TIOCSERSETMULTI = 0x545b; |
| 1108 | record_tdep->ioctl_TIOCMIWAIT = 0x545c; |
| 1109 | record_tdep->ioctl_TIOCGICOUNT = 0x545d; |
| 1110 | record_tdep->ioctl_FIOQSIZE = 0x545e; |
| 1111 | } |
| 1112 | |
| 1113 | /* Initialize OSABI common for GNU/Linux on 31- and 64-bit systems. */ |
| 1114 | |
| 1115 | static void |
| 1116 | s390_linux_init_abi_any (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 1117 | { |
| 1118 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1119 | |
| 1120 | tdep->s390_syscall_record = s390_linux_syscall_record; |
| 1121 | |
| 1122 | linux_init_abi (info, gdbarch); |
| 1123 | |
| 1124 | /* Register handling. */ |
| 1125 | set_gdbarch_core_read_description (gdbarch, s390_core_read_description); |
| 1126 | set_gdbarch_iterate_over_regset_sections (gdbarch, |
| 1127 | s390_iterate_over_regset_sections); |
| 1128 | set_gdbarch_write_pc (gdbarch, s390_write_pc); |
| 1129 | set_gdbarch_cannot_store_register (gdbarch, s390_cannot_store_register); |
| 1130 | |
| 1131 | /* Syscall handling. */ |
| 1132 | set_gdbarch_get_syscall_number (gdbarch, s390_linux_get_syscall_number); |
| 1133 | |
| 1134 | /* Frame handling. */ |
| 1135 | frame_unwind_append_unwinder (gdbarch, &s390_sigtramp_frame_unwind); |
| 1136 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
| 1137 | |
| 1138 | /* Enable TLS support. */ |
| 1139 | set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| 1140 | svr4_fetch_objfile_link_map); |
| 1141 | |
| 1142 | /* Support reverse debugging. */ |
| 1143 | set_gdbarch_process_record_signal (gdbarch, s390_linux_record_signal); |
| 1144 | s390_init_linux_record_tdep (&s390_linux_record_tdep, ABI_LINUX_S390); |
| 1145 | s390_init_linux_record_tdep (&s390x_linux_record_tdep, ABI_LINUX_ZSERIES); |
| 1146 | } |
| 1147 | |
| 1148 | /* Initialize OSABI for GNU/Linux on 31-bit systems. */ |
| 1149 | |
| 1150 | static void |
| 1151 | s390_linux_init_abi_31 (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 1152 | { |
| 1153 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1154 | |
| 1155 | tdep->abi = ABI_LINUX_S390; |
| 1156 | |
| 1157 | s390_linux_init_abi_any (info, gdbarch); |
| 1158 | |
| 1159 | set_solib_svr4_fetch_link_map_offsets (gdbarch, |
| 1160 | svr4_ilp32_fetch_link_map_offsets); |
| 1161 | set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390); |
| 1162 | } |
| 1163 | |
| 1164 | /* Initialize OSABI for GNU/Linux on 64-bit systems. */ |
| 1165 | |
| 1166 | static void |
| 1167 | s390_linux_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 1168 | { |
| 1169 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1170 | |
| 1171 | tdep->abi = ABI_LINUX_ZSERIES; |
| 1172 | |
| 1173 | s390_linux_init_abi_any (info, gdbarch); |
| 1174 | |
| 1175 | set_solib_svr4_fetch_link_map_offsets (gdbarch, |
| 1176 | svr4_lp64_fetch_link_map_offsets); |
| 1177 | set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390X); |
| 1178 | } |
| 1179 | |
| 1180 | void |
| 1181 | _initialize_s390_linux_tdep (void) |
| 1182 | { |
| 1183 | /* Hook us into the OSABI mechanism. */ |
| 1184 | gdbarch_register_osabi (bfd_arch_s390, bfd_mach_s390_31, GDB_OSABI_LINUX, |
| 1185 | s390_linux_init_abi_31); |
| 1186 | gdbarch_register_osabi (bfd_arch_s390, bfd_mach_s390_64, GDB_OSABI_LINUX, |
| 1187 | s390_linux_init_abi_64); |
| 1188 | |
| 1189 | /* Initialize the GNU/Linux target descriptions. */ |
| 1190 | initialize_tdesc_s390_linux32v1 (); |
| 1191 | initialize_tdesc_s390_linux32v2 (); |
| 1192 | initialize_tdesc_s390_linux64 (); |
| 1193 | initialize_tdesc_s390_linux64v1 (); |
| 1194 | initialize_tdesc_s390_linux64v2 (); |
| 1195 | initialize_tdesc_s390_te_linux64 (); |
| 1196 | initialize_tdesc_s390_vx_linux64 (); |
| 1197 | initialize_tdesc_s390_tevx_linux64 (); |
| 1198 | initialize_tdesc_s390_gs_linux64 (); |
| 1199 | initialize_tdesc_s390x_linux64v1 (); |
| 1200 | initialize_tdesc_s390x_linux64v2 (); |
| 1201 | initialize_tdesc_s390x_te_linux64 (); |
| 1202 | initialize_tdesc_s390x_vx_linux64 (); |
| 1203 | initialize_tdesc_s390x_tevx_linux64 (); |
| 1204 | initialize_tdesc_s390x_gs_linux64 (); |
| 1205 | } |