| 1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
| 2 | for GDB. |
| 3 | Copyright (C) 2001-2020 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 | #include "ax.h" |
| 26 | #include "tracepoint.h" |
| 27 | |
| 28 | #include <asm/ptrace.h> |
| 29 | #include "nat/gdb_ptrace.h" |
| 30 | #include <sys/uio.h> |
| 31 | #include <elf.h> |
| 32 | #include <inttypes.h> |
| 33 | |
| 34 | #include "linux-s390-tdesc.h" |
| 35 | |
| 36 | #ifndef HWCAP_S390_HIGH_GPRS |
| 37 | #define HWCAP_S390_HIGH_GPRS 512 |
| 38 | #endif |
| 39 | |
| 40 | #ifndef HWCAP_S390_TE |
| 41 | #define HWCAP_S390_TE 1024 |
| 42 | #endif |
| 43 | |
| 44 | #ifndef HWCAP_S390_VX |
| 45 | #define HWCAP_S390_VX 2048 |
| 46 | #endif |
| 47 | |
| 48 | #ifndef HWCAP_S390_GS |
| 49 | #define HWCAP_S390_GS 16384 |
| 50 | #endif |
| 51 | |
| 52 | #define s390_num_regs 52 |
| 53 | |
| 54 | /* Linux target op definitions for the S/390 architecture. */ |
| 55 | |
| 56 | class s390_target : public linux_process_target |
| 57 | { |
| 58 | public: |
| 59 | |
| 60 | const regs_info *get_regs_info () override; |
| 61 | |
| 62 | protected: |
| 63 | |
| 64 | void low_arch_setup () override; |
| 65 | |
| 66 | bool low_cannot_fetch_register (int regno) override; |
| 67 | |
| 68 | bool low_cannot_store_register (int regno) override; |
| 69 | }; |
| 70 | |
| 71 | /* The singleton target ops object. */ |
| 72 | |
| 73 | static s390_target the_s390_target; |
| 74 | |
| 75 | static int s390_regmap[] = { |
| 76 | PT_PSWMASK, PT_PSWADDR, |
| 77 | |
| 78 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, |
| 79 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, |
| 80 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, |
| 81 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, |
| 82 | |
| 83 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, |
| 84 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, |
| 85 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, |
| 86 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, |
| 87 | |
| 88 | PT_FPC, |
| 89 | |
| 90 | #ifndef __s390x__ |
| 91 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
| 92 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, |
| 93 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, |
| 94 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, |
| 95 | #else |
| 96 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, |
| 97 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, |
| 98 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, |
| 99 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, |
| 100 | #endif |
| 101 | |
| 102 | PT_ORIGGPR2, |
| 103 | }; |
| 104 | |
| 105 | #define s390_num_regs_3264 68 |
| 106 | |
| 107 | #ifdef __s390x__ |
| 108 | static int s390_regmap_3264[] = { |
| 109 | PT_PSWMASK, PT_PSWADDR, |
| 110 | |
| 111 | PT_GPR0, PT_GPR0, PT_GPR1, PT_GPR1, |
| 112 | PT_GPR2, PT_GPR2, PT_GPR3, PT_GPR3, |
| 113 | PT_GPR4, PT_GPR4, PT_GPR5, PT_GPR5, |
| 114 | PT_GPR6, PT_GPR6, PT_GPR7, PT_GPR7, |
| 115 | PT_GPR8, PT_GPR8, PT_GPR9, PT_GPR9, |
| 116 | PT_GPR10, PT_GPR10, PT_GPR11, PT_GPR11, |
| 117 | PT_GPR12, PT_GPR12, PT_GPR13, PT_GPR13, |
| 118 | PT_GPR14, PT_GPR14, PT_GPR15, PT_GPR15, |
| 119 | |
| 120 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, |
| 121 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, |
| 122 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, |
| 123 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, |
| 124 | |
| 125 | PT_FPC, |
| 126 | |
| 127 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, |
| 128 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, |
| 129 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, |
| 130 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, |
| 131 | |
| 132 | PT_ORIGGPR2, |
| 133 | }; |
| 134 | #else |
| 135 | static int s390_regmap_3264[] = { |
| 136 | PT_PSWMASK, PT_PSWADDR, |
| 137 | |
| 138 | -1, PT_GPR0, -1, PT_GPR1, |
| 139 | -1, PT_GPR2, -1, PT_GPR3, |
| 140 | -1, PT_GPR4, -1, PT_GPR5, |
| 141 | -1, PT_GPR6, -1, PT_GPR7, |
| 142 | -1, PT_GPR8, -1, PT_GPR9, |
| 143 | -1, PT_GPR10, -1, PT_GPR11, |
| 144 | -1, PT_GPR12, -1, PT_GPR13, |
| 145 | -1, PT_GPR14, -1, PT_GPR15, |
| 146 | |
| 147 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, |
| 148 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, |
| 149 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, |
| 150 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, |
| 151 | |
| 152 | PT_FPC, |
| 153 | |
| 154 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
| 155 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, |
| 156 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, |
| 157 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, |
| 158 | |
| 159 | PT_ORIGGPR2, |
| 160 | }; |
| 161 | #endif |
| 162 | |
| 163 | |
| 164 | bool |
| 165 | s390_target::low_cannot_fetch_register (int regno) |
| 166 | { |
| 167 | return false; |
| 168 | } |
| 169 | |
| 170 | bool |
| 171 | s390_target::low_cannot_store_register (int regno) |
| 172 | { |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | static void |
| 177 | s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf) |
| 178 | { |
| 179 | int size = register_size (regcache->tdesc, regno); |
| 180 | const struct regs_info *regs_info = the_linux_target->get_regs_info (); |
| 181 | struct usrregs_info *usr = regs_info->usrregs; |
| 182 | int regaddr = usr->regmap[regno]; |
| 183 | |
| 184 | if (size < sizeof (long)) |
| 185 | { |
| 186 | memset (buf, 0, sizeof (long)); |
| 187 | |
| 188 | if ((regno ^ 1) < usr->num_regs |
| 189 | && usr->regmap[regno ^ 1] == regaddr) |
| 190 | { |
| 191 | collect_register (regcache, regno & ~1, buf); |
| 192 | collect_register (regcache, (regno & ~1) + 1, |
| 193 | buf + sizeof (long) - size); |
| 194 | } |
| 195 | else if (regaddr == PT_PSWMASK) |
| 196 | { |
| 197 | /* Convert 4-byte PSW mask to 8 bytes by clearing bit 12 and copying |
| 198 | the basic addressing mode bit from the PSW address. */ |
| 199 | gdb_byte *addr = (gdb_byte *) alloca (register_size (regcache->tdesc, regno ^ 1)); |
| 200 | collect_register (regcache, regno, buf); |
| 201 | collect_register (regcache, regno ^ 1, addr); |
| 202 | buf[1] &= ~0x8; |
| 203 | buf[size] |= (addr[0] & 0x80); |
| 204 | } |
| 205 | else if (regaddr == PT_PSWADDR) |
| 206 | { |
| 207 | /* Convert 4-byte PSW address to 8 bytes by clearing the addressing |
| 208 | mode bit (which gets copied to the PSW mask instead). */ |
| 209 | collect_register (regcache, regno, buf + sizeof (long) - size); |
| 210 | buf[sizeof (long) - size] &= ~0x80; |
| 211 | } |
| 212 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
| 213 | || regaddr == PT_ORIGGPR2) |
| 214 | collect_register (regcache, regno, buf + sizeof (long) - size); |
| 215 | else |
| 216 | collect_register (regcache, regno, buf); |
| 217 | } |
| 218 | else if (regaddr != -1) |
| 219 | collect_register (regcache, regno, buf); |
| 220 | } |
| 221 | |
| 222 | static void |
| 223 | s390_supply_ptrace_register (struct regcache *regcache, |
| 224 | int regno, const char *buf) |
| 225 | { |
| 226 | int size = register_size (regcache->tdesc, regno); |
| 227 | const struct regs_info *regs_info = the_linux_target->get_regs_info (); |
| 228 | struct usrregs_info *usr = regs_info->usrregs; |
| 229 | int regaddr = usr->regmap[regno]; |
| 230 | |
| 231 | if (size < sizeof (long)) |
| 232 | { |
| 233 | if ((regno ^ 1) < usr->num_regs |
| 234 | && usr->regmap[regno ^ 1] == regaddr) |
| 235 | { |
| 236 | supply_register (regcache, regno & ~1, buf); |
| 237 | supply_register (regcache, (regno & ~1) + 1, |
| 238 | buf + sizeof (long) - size); |
| 239 | } |
| 240 | else if (regaddr == PT_PSWMASK) |
| 241 | { |
| 242 | /* Convert 8-byte PSW mask to 4 bytes by setting bit 12 and copying |
| 243 | the basic addressing mode into the PSW address. */ |
| 244 | gdb_byte *mask = (gdb_byte *) alloca (size); |
| 245 | gdb_byte *addr = (gdb_byte *) alloca (register_size (regcache->tdesc, regno ^ 1)); |
| 246 | memcpy (mask, buf, size); |
| 247 | mask[1] |= 0x8; |
| 248 | supply_register (regcache, regno, mask); |
| 249 | |
| 250 | collect_register (regcache, regno ^ 1, addr); |
| 251 | addr[0] &= ~0x80; |
| 252 | addr[0] |= (buf[size] & 0x80); |
| 253 | supply_register (regcache, regno ^ 1, addr); |
| 254 | } |
| 255 | else if (regaddr == PT_PSWADDR) |
| 256 | { |
| 257 | /* Convert 8-byte PSW address to 4 bytes by truncating, but |
| 258 | keeping the addressing mode bit (which was set from the mask). */ |
| 259 | gdb_byte *addr = (gdb_byte *) alloca (size); |
| 260 | char amode; |
| 261 | collect_register (regcache, regno, addr); |
| 262 | amode = addr[0] & 0x80; |
| 263 | memcpy (addr, buf + sizeof (long) - size, size); |
| 264 | addr[0] &= ~0x80; |
| 265 | addr[0] |= amode; |
| 266 | supply_register (regcache, regno, addr); |
| 267 | } |
| 268 | else if ((regaddr >= PT_GPR0 && regaddr <= PT_GPR15) |
| 269 | || regaddr == PT_ORIGGPR2) |
| 270 | supply_register (regcache, regno, buf + sizeof (long) - size); |
| 271 | else |
| 272 | supply_register (regcache, regno, buf); |
| 273 | } |
| 274 | else if (regaddr != -1) |
| 275 | supply_register (regcache, regno, buf); |
| 276 | } |
| 277 | |
| 278 | /* Provide only a fill function for the general register set. ps_lgetregs |
| 279 | will use this for NPTL support. */ |
| 280 | |
| 281 | static void |
| 282 | s390_fill_gregset (struct regcache *regcache, void *buf) |
| 283 | { |
| 284 | int i; |
| 285 | const struct regs_info *regs_info = the_linux_target->get_regs_info (); |
| 286 | struct usrregs_info *usr = regs_info->usrregs; |
| 287 | |
| 288 | for (i = 0; i < usr->num_regs; i++) |
| 289 | { |
| 290 | if (usr->regmap[i] < PT_PSWMASK |
| 291 | || usr->regmap[i] > PT_ACR15) |
| 292 | continue; |
| 293 | |
| 294 | s390_collect_ptrace_register (regcache, i, |
| 295 | (char *) buf + usr->regmap[i]); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | /* Fill and store functions for extended register sets. */ |
| 300 | |
| 301 | #ifndef __s390x__ |
| 302 | static void |
| 303 | s390_fill_gprs_high (struct regcache *regcache, void *buf) |
| 304 | { |
| 305 | int r0h = find_regno (regcache->tdesc, "r0h"); |
| 306 | int i; |
| 307 | |
| 308 | for (i = 0; i < 16; i++) |
| 309 | collect_register (regcache, r0h + 2 * i, (char *) buf + 4 * i); |
| 310 | } |
| 311 | |
| 312 | static void |
| 313 | s390_store_gprs_high (struct regcache *regcache, const void *buf) |
| 314 | { |
| 315 | int r0h = find_regno (regcache->tdesc, "r0h"); |
| 316 | int i; |
| 317 | |
| 318 | for (i = 0; i < 16; i++) |
| 319 | supply_register (regcache, r0h + 2 * i, (const char *) buf + 4 * i); |
| 320 | } |
| 321 | #endif |
| 322 | |
| 323 | static void |
| 324 | s390_store_last_break (struct regcache *regcache, const void *buf) |
| 325 | { |
| 326 | const char *p; |
| 327 | |
| 328 | p = (const char *) buf + 8 - register_size (regcache->tdesc, 0); |
| 329 | supply_register_by_name (regcache, "last_break", p); |
| 330 | } |
| 331 | |
| 332 | static void |
| 333 | s390_fill_system_call (struct regcache *regcache, void *buf) |
| 334 | { |
| 335 | collect_register_by_name (regcache, "system_call", buf); |
| 336 | } |
| 337 | |
| 338 | static void |
| 339 | s390_store_system_call (struct regcache *regcache, const void *buf) |
| 340 | { |
| 341 | supply_register_by_name (regcache, "system_call", buf); |
| 342 | } |
| 343 | |
| 344 | static void |
| 345 | s390_store_tdb (struct regcache *regcache, const void *buf) |
| 346 | { |
| 347 | int tdb0 = find_regno (regcache->tdesc, "tdb0"); |
| 348 | int tr0 = find_regno (regcache->tdesc, "tr0"); |
| 349 | int i; |
| 350 | |
| 351 | for (i = 0; i < 4; i++) |
| 352 | supply_register (regcache, tdb0 + i, (const char *) buf + 8 * i); |
| 353 | |
| 354 | for (i = 0; i < 16; i++) |
| 355 | supply_register (regcache, tr0 + i, (const char *) buf + 8 * (16 + i)); |
| 356 | } |
| 357 | |
| 358 | static void |
| 359 | s390_fill_vxrs_low (struct regcache *regcache, void *buf) |
| 360 | { |
| 361 | int v0 = find_regno (regcache->tdesc, "v0l"); |
| 362 | int i; |
| 363 | |
| 364 | for (i = 0; i < 16; i++) |
| 365 | collect_register (regcache, v0 + i, (char *) buf + 8 * i); |
| 366 | } |
| 367 | |
| 368 | static void |
| 369 | s390_store_vxrs_low (struct regcache *regcache, const void *buf) |
| 370 | { |
| 371 | int v0 = find_regno (regcache->tdesc, "v0l"); |
| 372 | int i; |
| 373 | |
| 374 | for (i = 0; i < 16; i++) |
| 375 | supply_register (regcache, v0 + i, (const char *) buf + 8 * i); |
| 376 | } |
| 377 | |
| 378 | static void |
| 379 | s390_fill_vxrs_high (struct regcache *regcache, void *buf) |
| 380 | { |
| 381 | int v16 = find_regno (regcache->tdesc, "v16"); |
| 382 | int i; |
| 383 | |
| 384 | for (i = 0; i < 16; i++) |
| 385 | collect_register (regcache, v16 + i, (char *) buf + 16 * i); |
| 386 | } |
| 387 | |
| 388 | static void |
| 389 | s390_store_vxrs_high (struct regcache *regcache, const void *buf) |
| 390 | { |
| 391 | int v16 = find_regno (regcache->tdesc, "v16"); |
| 392 | int i; |
| 393 | |
| 394 | for (i = 0; i < 16; i++) |
| 395 | supply_register (regcache, v16 + i, (const char *) buf + 16 * i); |
| 396 | } |
| 397 | |
| 398 | static void |
| 399 | s390_store_gs (struct regcache *regcache, const void *buf) |
| 400 | { |
| 401 | int gsd = find_regno (regcache->tdesc, "gsd"); |
| 402 | int i; |
| 403 | |
| 404 | for (i = 0; i < 3; i++) |
| 405 | supply_register (regcache, gsd + i, (const char *) buf + 8 * (i + 1)); |
| 406 | } |
| 407 | |
| 408 | static void |
| 409 | s390_store_gsbc (struct regcache *regcache, const void *buf) |
| 410 | { |
| 411 | int bc_gsd = find_regno (regcache->tdesc, "bc_gsd"); |
| 412 | int i; |
| 413 | |
| 414 | for (i = 0; i < 3; i++) |
| 415 | supply_register (regcache, bc_gsd + i, (const char *) buf + 8 * (i + 1)); |
| 416 | } |
| 417 | |
| 418 | static struct regset_info s390_regsets[] = { |
| 419 | { 0, 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL }, |
| 420 | #ifndef __s390x__ |
| 421 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_HIGH_GPRS, 0, |
| 422 | EXTENDED_REGS, s390_fill_gprs_high, s390_store_gprs_high }, |
| 423 | #endif |
| 424 | /* Last break address is read-only; no fill function. */ |
| 425 | { PTRACE_GETREGSET, -1, NT_S390_LAST_BREAK, 0, EXTENDED_REGS, |
| 426 | NULL, s390_store_last_break }, |
| 427 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_SYSTEM_CALL, 0, |
| 428 | EXTENDED_REGS, s390_fill_system_call, s390_store_system_call }, |
| 429 | /* TDB is read-only. */ |
| 430 | { PTRACE_GETREGSET, -1, NT_S390_TDB, 0, EXTENDED_REGS, |
| 431 | NULL, s390_store_tdb }, |
| 432 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_LOW, 0, |
| 433 | EXTENDED_REGS, s390_fill_vxrs_low, s390_store_vxrs_low }, |
| 434 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_S390_VXRS_HIGH, 0, |
| 435 | EXTENDED_REGS, s390_fill_vxrs_high, s390_store_vxrs_high }, |
| 436 | /* Guarded storage registers are read-only. */ |
| 437 | { PTRACE_GETREGSET, -1, NT_S390_GS_CB, 0, EXTENDED_REGS, |
| 438 | NULL, s390_store_gs }, |
| 439 | { PTRACE_GETREGSET, -1, NT_S390_GS_BC, 0, EXTENDED_REGS, |
| 440 | NULL, s390_store_gsbc }, |
| 441 | NULL_REGSET |
| 442 | }; |
| 443 | |
| 444 | |
| 445 | static const gdb_byte s390_breakpoint[] = { 0, 1 }; |
| 446 | #define s390_breakpoint_len 2 |
| 447 | |
| 448 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
| 449 | |
| 450 | static const gdb_byte * |
| 451 | s390_sw_breakpoint_from_kind (int kind, int *size) |
| 452 | { |
| 453 | *size = s390_breakpoint_len; |
| 454 | return s390_breakpoint; |
| 455 | } |
| 456 | |
| 457 | static CORE_ADDR |
| 458 | s390_get_pc (struct regcache *regcache) |
| 459 | { |
| 460 | if (register_size (regcache->tdesc, 0) == 4) |
| 461 | { |
| 462 | unsigned int pswa; |
| 463 | collect_register_by_name (regcache, "pswa", &pswa); |
| 464 | return pswa & 0x7fffffff; |
| 465 | } |
| 466 | else |
| 467 | { |
| 468 | unsigned long pc; |
| 469 | collect_register_by_name (regcache, "pswa", &pc); |
| 470 | return pc; |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | static void |
| 475 | s390_set_pc (struct regcache *regcache, CORE_ADDR newpc) |
| 476 | { |
| 477 | if (register_size (regcache->tdesc, 0) == 4) |
| 478 | { |
| 479 | unsigned int pswa; |
| 480 | collect_register_by_name (regcache, "pswa", &pswa); |
| 481 | pswa = (pswa & 0x80000000) | (newpc & 0x7fffffff); |
| 482 | supply_register_by_name (regcache, "pswa", &pswa); |
| 483 | } |
| 484 | else |
| 485 | { |
| 486 | unsigned long pc = newpc; |
| 487 | supply_register_by_name (regcache, "pswa", &pc); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | /* Determine the word size for the given PID, in bytes. */ |
| 492 | |
| 493 | #ifdef __s390x__ |
| 494 | static int |
| 495 | s390_get_wordsize (int pid) |
| 496 | { |
| 497 | errno = 0; |
| 498 | PTRACE_XFER_TYPE pswm = ptrace (PTRACE_PEEKUSER, pid, |
| 499 | (PTRACE_TYPE_ARG3) 0, |
| 500 | (PTRACE_TYPE_ARG4) 0); |
| 501 | if (errno != 0) |
| 502 | { |
| 503 | warning (_("Couldn't determine word size, assuming 64-bit.")); |
| 504 | return 8; |
| 505 | } |
| 506 | /* Derive word size from extended addressing mode (PSW bit 31). */ |
| 507 | return pswm & (1L << 32) ? 8 : 4; |
| 508 | } |
| 509 | #else |
| 510 | #define s390_get_wordsize(pid) 4 |
| 511 | #endif |
| 512 | |
| 513 | static int |
| 514 | s390_check_regset (int pid, int regset, int regsize) |
| 515 | { |
| 516 | void *buf = alloca (regsize); |
| 517 | struct iovec iov; |
| 518 | |
| 519 | iov.iov_base = buf; |
| 520 | iov.iov_len = regsize; |
| 521 | |
| 522 | if (ptrace (PTRACE_GETREGSET, pid, (long) regset, (long) &iov) >= 0 |
| 523 | || errno == ENODATA) |
| 524 | return 1; |
| 525 | return 0; |
| 526 | } |
| 527 | |
| 528 | /* For a 31-bit inferior, whether the kernel supports using the full |
| 529 | 64-bit GPRs. */ |
| 530 | static int have_hwcap_s390_high_gprs = 0; |
| 531 | static int have_hwcap_s390_vx = 0; |
| 532 | |
| 533 | void |
| 534 | s390_target::low_arch_setup () |
| 535 | { |
| 536 | const struct target_desc *tdesc; |
| 537 | struct regset_info *regset; |
| 538 | |
| 539 | /* Determine word size and HWCAP. */ |
| 540 | int pid = pid_of (current_thread); |
| 541 | int wordsize = s390_get_wordsize (pid); |
| 542 | unsigned long hwcap = linux_get_hwcap (wordsize); |
| 543 | |
| 544 | /* Check whether the kernel supports extra register sets. */ |
| 545 | int have_regset_last_break |
| 546 | = s390_check_regset (pid, NT_S390_LAST_BREAK, 8); |
| 547 | int have_regset_system_call |
| 548 | = s390_check_regset (pid, NT_S390_SYSTEM_CALL, 4); |
| 549 | int have_regset_tdb |
| 550 | = (s390_check_regset (pid, NT_S390_TDB, 256) |
| 551 | && (hwcap & HWCAP_S390_TE) != 0); |
| 552 | int have_regset_vxrs |
| 553 | = (s390_check_regset (pid, NT_S390_VXRS_LOW, 128) |
| 554 | && s390_check_regset (pid, NT_S390_VXRS_HIGH, 256) |
| 555 | && (hwcap & HWCAP_S390_VX) != 0); |
| 556 | int have_regset_gs |
| 557 | = (s390_check_regset (pid, NT_S390_GS_CB, 32) |
| 558 | && s390_check_regset (pid, NT_S390_GS_BC, 32) |
| 559 | && (hwcap & HWCAP_S390_GS) != 0); |
| 560 | |
| 561 | { |
| 562 | #ifdef __s390x__ |
| 563 | if (wordsize == 8) |
| 564 | { |
| 565 | if (have_regset_gs) |
| 566 | tdesc = tdesc_s390x_gs_linux64; |
| 567 | else if (have_regset_vxrs) |
| 568 | tdesc = (have_regset_tdb ? tdesc_s390x_tevx_linux64 : |
| 569 | tdesc_s390x_vx_linux64); |
| 570 | else if (have_regset_tdb) |
| 571 | tdesc = tdesc_s390x_te_linux64; |
| 572 | else if (have_regset_system_call) |
| 573 | tdesc = tdesc_s390x_linux64v2; |
| 574 | else if (have_regset_last_break) |
| 575 | tdesc = tdesc_s390x_linux64v1; |
| 576 | else |
| 577 | tdesc = tdesc_s390x_linux64; |
| 578 | } |
| 579 | |
| 580 | /* For a 31-bit inferior, check whether the kernel supports |
| 581 | using the full 64-bit GPRs. */ |
| 582 | else |
| 583 | #endif |
| 584 | if (hwcap & HWCAP_S390_HIGH_GPRS) |
| 585 | { |
| 586 | have_hwcap_s390_high_gprs = 1; |
| 587 | if (have_regset_gs) |
| 588 | tdesc = tdesc_s390_gs_linux64; |
| 589 | else if (have_regset_vxrs) |
| 590 | tdesc = (have_regset_tdb ? tdesc_s390_tevx_linux64 : |
| 591 | tdesc_s390_vx_linux64); |
| 592 | else if (have_regset_tdb) |
| 593 | tdesc = tdesc_s390_te_linux64; |
| 594 | else if (have_regset_system_call) |
| 595 | tdesc = tdesc_s390_linux64v2; |
| 596 | else if (have_regset_last_break) |
| 597 | tdesc = tdesc_s390_linux64v1; |
| 598 | else |
| 599 | tdesc = tdesc_s390_linux64; |
| 600 | } |
| 601 | else |
| 602 | { |
| 603 | /* Assume 31-bit inferior process. */ |
| 604 | if (have_regset_system_call) |
| 605 | tdesc = tdesc_s390_linux32v2; |
| 606 | else if (have_regset_last_break) |
| 607 | tdesc = tdesc_s390_linux32v1; |
| 608 | else |
| 609 | tdesc = tdesc_s390_linux32; |
| 610 | } |
| 611 | |
| 612 | have_hwcap_s390_vx = have_regset_vxrs; |
| 613 | } |
| 614 | |
| 615 | /* Update target_regsets according to available register sets. */ |
| 616 | for (regset = s390_regsets; regset->size >= 0; regset++) |
| 617 | if (regset->get_request == PTRACE_GETREGSET) |
| 618 | switch (regset->nt_type) |
| 619 | { |
| 620 | #ifndef __s390x__ |
| 621 | case NT_S390_HIGH_GPRS: |
| 622 | regset->size = have_hwcap_s390_high_gprs ? 64 : 0; |
| 623 | break; |
| 624 | #endif |
| 625 | case NT_S390_LAST_BREAK: |
| 626 | regset->size = have_regset_last_break ? 8 : 0; |
| 627 | break; |
| 628 | case NT_S390_SYSTEM_CALL: |
| 629 | regset->size = have_regset_system_call ? 4 : 0; |
| 630 | break; |
| 631 | case NT_S390_TDB: |
| 632 | regset->size = have_regset_tdb ? 256 : 0; |
| 633 | break; |
| 634 | case NT_S390_VXRS_LOW: |
| 635 | regset->size = have_regset_vxrs ? 128 : 0; |
| 636 | break; |
| 637 | case NT_S390_VXRS_HIGH: |
| 638 | regset->size = have_regset_vxrs ? 256 : 0; |
| 639 | break; |
| 640 | case NT_S390_GS_CB: |
| 641 | case NT_S390_GS_BC: |
| 642 | regset->size = have_regset_gs ? 32 : 0; |
| 643 | default: |
| 644 | break; |
| 645 | } |
| 646 | |
| 647 | current_process ()->tdesc = tdesc; |
| 648 | } |
| 649 | |
| 650 | |
| 651 | static int |
| 652 | s390_breakpoint_at (CORE_ADDR pc) |
| 653 | { |
| 654 | unsigned char c[s390_breakpoint_len]; |
| 655 | read_inferior_memory (pc, c, s390_breakpoint_len); |
| 656 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; |
| 657 | } |
| 658 | |
| 659 | /* Breakpoint/Watchpoint support. */ |
| 660 | |
| 661 | /* The "supports_z_point_type" linux_target_ops method. */ |
| 662 | |
| 663 | static int |
| 664 | s390_supports_z_point_type (char z_type) |
| 665 | { |
| 666 | switch (z_type) |
| 667 | { |
| 668 | case Z_PACKET_SW_BP: |
| 669 | return 1; |
| 670 | default: |
| 671 | return 0; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | /* Support for hardware single step. */ |
| 676 | |
| 677 | static int |
| 678 | s390_supports_hardware_single_step (void) |
| 679 | { |
| 680 | return 1; |
| 681 | } |
| 682 | |
| 683 | static struct usrregs_info s390_usrregs_info = |
| 684 | { |
| 685 | s390_num_regs, |
| 686 | s390_regmap, |
| 687 | }; |
| 688 | |
| 689 | static struct regsets_info s390_regsets_info = |
| 690 | { |
| 691 | s390_regsets, /* regsets */ |
| 692 | 0, /* num_regsets */ |
| 693 | NULL, /* disabled_regsets */ |
| 694 | }; |
| 695 | |
| 696 | static struct regs_info myregs_info = |
| 697 | { |
| 698 | NULL, /* regset_bitmap */ |
| 699 | &s390_usrregs_info, |
| 700 | &s390_regsets_info |
| 701 | }; |
| 702 | |
| 703 | static struct usrregs_info s390_usrregs_info_3264 = |
| 704 | { |
| 705 | s390_num_regs_3264, |
| 706 | s390_regmap_3264 |
| 707 | }; |
| 708 | |
| 709 | static struct regsets_info s390_regsets_info_3264 = |
| 710 | { |
| 711 | s390_regsets, /* regsets */ |
| 712 | 0, /* num_regsets */ |
| 713 | NULL, /* disabled_regsets */ |
| 714 | }; |
| 715 | |
| 716 | static struct regs_info regs_info_3264 = |
| 717 | { |
| 718 | NULL, /* regset_bitmap */ |
| 719 | &s390_usrregs_info_3264, |
| 720 | &s390_regsets_info_3264 |
| 721 | }; |
| 722 | |
| 723 | const regs_info * |
| 724 | s390_target::get_regs_info () |
| 725 | { |
| 726 | if (have_hwcap_s390_high_gprs) |
| 727 | { |
| 728 | #ifdef __s390x__ |
| 729 | const struct target_desc *tdesc = current_process ()->tdesc; |
| 730 | |
| 731 | if (register_size (tdesc, 0) == 4) |
| 732 | return ®s_info_3264; |
| 733 | #else |
| 734 | return ®s_info_3264; |
| 735 | #endif |
| 736 | } |
| 737 | return &myregs_info; |
| 738 | } |
| 739 | |
| 740 | /* The "supports_tracepoints" linux_target_ops method. */ |
| 741 | |
| 742 | static int |
| 743 | s390_supports_tracepoints (void) |
| 744 | { |
| 745 | return 1; |
| 746 | } |
| 747 | |
| 748 | /* Implementation of linux_target_ops method "get_thread_area". */ |
| 749 | |
| 750 | static int |
| 751 | s390_get_thread_area (int lwpid, CORE_ADDR *addrp) |
| 752 | { |
| 753 | CORE_ADDR res = ptrace (PTRACE_PEEKUSER, lwpid, (long) PT_ACR0, (long) 0); |
| 754 | #ifdef __s390x__ |
| 755 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 756 | |
| 757 | if (register_size (regcache->tdesc, 0) == 4) |
| 758 | res &= 0xffffffffull; |
| 759 | #endif |
| 760 | *addrp = res; |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | |
| 765 | /* Fast tracepoint support. |
| 766 | |
| 767 | The register save area on stack is identical for all targets: |
| 768 | |
| 769 | 0x000+i*0x10: VR0-VR31 |
| 770 | 0x200+i*8: GR0-GR15 |
| 771 | 0x280+i*4: AR0-AR15 |
| 772 | 0x2c0: PSWM [64-bit] |
| 773 | 0x2c8: PSWA [64-bit] |
| 774 | 0x2d0: FPC |
| 775 | |
| 776 | If we're on 31-bit linux, we just don't store the high parts of the GPRs. |
| 777 | Likewise, if there's no VX support, we just store the FRs into the slots |
| 778 | of low VR halves. The agent code is responsible for rearranging that |
| 779 | into regcache. */ |
| 780 | |
| 781 | /* Code sequence saving GPRs for 31-bit target with no high GPRs. There's |
| 782 | one trick used at the very beginning: since there's no way to allocate |
| 783 | stack space without destroying CC (lay instruction can do it, but it's |
| 784 | only supported on later CPUs), we take 4 different execution paths for |
| 785 | every possible value of CC, allocate stack space, save %r0, stuff the |
| 786 | CC value in %r0 (shifted to match its position in PSWM high word), |
| 787 | then branch to common path. */ |
| 788 | |
| 789 | static const unsigned char s390_ft_entry_gpr_esa[] = { |
| 790 | 0xa7, 0x14, 0x00, 0x1e, /* jo .Lcc3 */ |
| 791 | 0xa7, 0x24, 0x00, 0x14, /* jh .Lcc2 */ |
| 792 | 0xa7, 0x44, 0x00, 0x0a, /* jl .Lcc1 */ |
| 793 | /* CC = 0 */ |
| 794 | 0xa7, 0xfa, 0xfd, 0x00, /* ahi %r15, -0x300 */ |
| 795 | 0x50, 0x00, 0xf2, 0x04, /* st %r0, 0x204(%r15) */ |
| 796 | 0xa7, 0x08, 0x00, 0x00, /* lhi %r0, 0 */ |
| 797 | 0xa7, 0xf4, 0x00, 0x18, /* j .Lccdone */ |
| 798 | /* .Lcc1: */ |
| 799 | 0xa7, 0xfa, 0xfd, 0x00, /* ahi %r15, -0x300 */ |
| 800 | 0x50, 0x00, 0xf2, 0x04, /* st %r0, 0x204(%r15) */ |
| 801 | 0xa7, 0x08, 0x10, 0x00, /* lhi %r0, 0x1000 */ |
| 802 | 0xa7, 0xf4, 0x00, 0x10, /* j .Lccdone */ |
| 803 | /* .Lcc2: */ |
| 804 | 0xa7, 0xfa, 0xfd, 0x00, /* ahi %r15, -0x300 */ |
| 805 | 0x50, 0x00, 0xf2, 0x04, /* st %r0, 0x204(%r15) */ |
| 806 | 0xa7, 0x08, 0x20, 0x00, /* lhi %r0, 0x2000 */ |
| 807 | 0xa7, 0xf4, 0x00, 0x08, /* j .Lccdone */ |
| 808 | /* .Lcc3: */ |
| 809 | 0xa7, 0xfa, 0xfd, 0x00, /* ahi %r15, -0x300 */ |
| 810 | 0x50, 0x00, 0xf2, 0x04, /* st %r0, 0x204(%r15) */ |
| 811 | 0xa7, 0x08, 0x30, 0x00, /* lhi %r0, 0x3000 */ |
| 812 | /* .Lccdone: */ |
| 813 | 0x50, 0x10, 0xf2, 0x0c, /* st %r1, 0x20c(%r15) */ |
| 814 | 0x50, 0x20, 0xf2, 0x14, /* st %r2, 0x214(%r15) */ |
| 815 | 0x50, 0x30, 0xf2, 0x1c, /* st %r3, 0x21c(%r15) */ |
| 816 | 0x50, 0x40, 0xf2, 0x24, /* st %r4, 0x224(%r15) */ |
| 817 | 0x50, 0x50, 0xf2, 0x2c, /* st %r5, 0x22c(%r15) */ |
| 818 | 0x50, 0x60, 0xf2, 0x34, /* st %r6, 0x234(%r15) */ |
| 819 | 0x50, 0x70, 0xf2, 0x3c, /* st %r7, 0x23c(%r15) */ |
| 820 | 0x50, 0x80, 0xf2, 0x44, /* st %r8, 0x244(%r15) */ |
| 821 | 0x50, 0x90, 0xf2, 0x4c, /* st %r9, 0x24c(%r15) */ |
| 822 | 0x50, 0xa0, 0xf2, 0x54, /* st %r10, 0x254(%r15) */ |
| 823 | 0x50, 0xb0, 0xf2, 0x5c, /* st %r11, 0x25c(%r15) */ |
| 824 | 0x50, 0xc0, 0xf2, 0x64, /* st %r12, 0x264(%r15) */ |
| 825 | 0x50, 0xd0, 0xf2, 0x6c, /* st %r13, 0x26c(%r15) */ |
| 826 | 0x50, 0xe0, 0xf2, 0x74, /* st %r14, 0x274(%r15) */ |
| 827 | /* Compute original value of %r15 and store it. We use ahi instead |
| 828 | of la to preserve the whole value, and not just the low 31 bits. |
| 829 | This is not particularly important here, but essential in the |
| 830 | zarch case where someone might be using the high word of %r15 |
| 831 | as an extra register. */ |
| 832 | 0x18, 0x1f, /* lr %r1, %r15 */ |
| 833 | 0xa7, 0x1a, 0x03, 0x00, /* ahi %r1, 0x300 */ |
| 834 | 0x50, 0x10, 0xf2, 0x7c, /* st %r1, 0x27c(%r15) */ |
| 835 | }; |
| 836 | |
| 837 | /* Code sequence saving GPRs for 31-bit target with high GPRs and for 64-bit |
| 838 | target. Same as above, except this time we can use load/store multiple, |
| 839 | since the 64-bit regs are tightly packed. */ |
| 840 | |
| 841 | static const unsigned char s390_ft_entry_gpr_zarch[] = { |
| 842 | 0xa7, 0x14, 0x00, 0x21, /* jo .Lcc3 */ |
| 843 | 0xa7, 0x24, 0x00, 0x16, /* jh .Lcc2 */ |
| 844 | 0xa7, 0x44, 0x00, 0x0b, /* jl .Lcc1 */ |
| 845 | /* CC = 0 */ |
| 846 | 0xa7, 0xfb, 0xfd, 0x00, /* aghi %r15, -0x300 */ |
| 847 | 0xeb, 0x0e, 0xf2, 0x00, 0x00, 0x24, /* stmg %r0, %r14, 0x200(%r15) */ |
| 848 | 0xa7, 0x08, 0x00, 0x00, /* lhi %r0, 0 */ |
| 849 | 0xa7, 0xf4, 0x00, 0x1b, /* j .Lccdone */ |
| 850 | /* .Lcc1: */ |
| 851 | 0xa7, 0xfb, 0xfd, 0x00, /* aghi %r15, -0x300 */ |
| 852 | 0xeb, 0x0e, 0xf2, 0x00, 0x00, 0x24, /* stmg %r0, %r14, 0x200(%r15) */ |
| 853 | 0xa7, 0x08, 0x10, 0x00, /* lhi %r0, 0x1000 */ |
| 854 | 0xa7, 0xf4, 0x00, 0x12, /* j .Lccdone */ |
| 855 | /* .Lcc2: */ |
| 856 | 0xa7, 0xfb, 0xfd, 0x00, /* aghi %r15, -0x300 */ |
| 857 | 0xeb, 0x0e, 0xf2, 0x00, 0x00, 0x24, /* stmg %r0, %r14, 0x200(%r15) */ |
| 858 | 0xa7, 0x08, 0x20, 0x00, /* lhi %r0, 0x2000 */ |
| 859 | 0xa7, 0xf4, 0x00, 0x09, /* j .Lccdone */ |
| 860 | /* .Lcc3: */ |
| 861 | 0xa7, 0xfb, 0xfd, 0x00, /* aghi %r15, -0x300 */ |
| 862 | 0xeb, 0x0e, 0xf2, 0x00, 0x00, 0x24, /* stmg %r0, %r14, 0x200(%r15) */ |
| 863 | 0xa7, 0x08, 0x30, 0x00, /* lhi %r0, 0x3000 */ |
| 864 | /* .Lccdone: */ |
| 865 | 0xb9, 0x04, 0x00, 0x1f, /* lgr %r1, %r15 */ |
| 866 | 0xa7, 0x1b, 0x03, 0x00, /* aghi %r1, 0x300 */ |
| 867 | 0xe3, 0x10, 0xf2, 0x78, 0x00, 0x24, /* stg %r1, 0x278(%r15) */ |
| 868 | }; |
| 869 | |
| 870 | /* Code sequence saving ARs, PSWM and FPC. PSWM has to be assembled from |
| 871 | current PSWM (read by epsw) and CC from entry (in %r0). */ |
| 872 | |
| 873 | static const unsigned char s390_ft_entry_misc[] = { |
| 874 | 0x9b, 0x0f, 0xf2, 0x80, /* stam %a0, %a15, 0x20(%%r15) */ |
| 875 | 0xb9, 0x8d, 0x00, 0x23, /* epsw %r2, %r3 */ |
| 876 | 0xa7, 0x18, 0xcf, 0xff, /* lhi %r1, ~0x3000 */ |
| 877 | 0x14, 0x21, /* nr %r2, %r1 */ |
| 878 | 0x16, 0x20, /* or %r2, %r0 */ |
| 879 | 0x50, 0x20, 0xf2, 0xc0, /* st %r2, 0x2c0(%r15) */ |
| 880 | 0x50, 0x30, 0xf2, 0xc4, /* st %r3, 0x2c4(%r15) */ |
| 881 | 0xb2, 0x9c, 0xf2, 0xd0, /* stfpc 0x2d0(%r15) */ |
| 882 | }; |
| 883 | |
| 884 | /* Code sequence saving FRs, used if VX not supported. */ |
| 885 | |
| 886 | static const unsigned char s390_ft_entry_fr[] = { |
| 887 | 0x60, 0x00, 0xf0, 0x00, /* std %f0, 0x000(%r15) */ |
| 888 | 0x60, 0x10, 0xf0, 0x10, /* std %f1, 0x010(%r15) */ |
| 889 | 0x60, 0x20, 0xf0, 0x20, /* std %f2, 0x020(%r15) */ |
| 890 | 0x60, 0x30, 0xf0, 0x30, /* std %f3, 0x030(%r15) */ |
| 891 | 0x60, 0x40, 0xf0, 0x40, /* std %f4, 0x040(%r15) */ |
| 892 | 0x60, 0x50, 0xf0, 0x50, /* std %f5, 0x050(%r15) */ |
| 893 | 0x60, 0x60, 0xf0, 0x60, /* std %f6, 0x060(%r15) */ |
| 894 | 0x60, 0x70, 0xf0, 0x70, /* std %f7, 0x070(%r15) */ |
| 895 | 0x60, 0x80, 0xf0, 0x80, /* std %f8, 0x080(%r15) */ |
| 896 | 0x60, 0x90, 0xf0, 0x90, /* std %f9, 0x090(%r15) */ |
| 897 | 0x60, 0xa0, 0xf0, 0xa0, /* std %f10, 0x0a0(%r15) */ |
| 898 | 0x60, 0xb0, 0xf0, 0xb0, /* std %f11, 0x0b0(%r15) */ |
| 899 | 0x60, 0xc0, 0xf0, 0xc0, /* std %f12, 0x0c0(%r15) */ |
| 900 | 0x60, 0xd0, 0xf0, 0xd0, /* std %f13, 0x0d0(%r15) */ |
| 901 | 0x60, 0xe0, 0xf0, 0xe0, /* std %f14, 0x0e0(%r15) */ |
| 902 | 0x60, 0xf0, 0xf0, 0xf0, /* std %f15, 0x0f0(%r15) */ |
| 903 | }; |
| 904 | |
| 905 | /* Code sequence saving VRs, used if VX not supported. */ |
| 906 | |
| 907 | static const unsigned char s390_ft_entry_vr[] = { |
| 908 | 0xe7, 0x0f, 0xf0, 0x00, 0x00, 0x3e, /* vstm %v0, %v15, 0x000(%r15) */ |
| 909 | 0xe7, 0x0f, 0xf1, 0x00, 0x0c, 0x3e, /* vstm %v16, %v31, 0x100(%r15) */ |
| 910 | }; |
| 911 | |
| 912 | /* Code sequence doing the collection call for 31-bit target. %r1 contains |
| 913 | the address of the literal pool. */ |
| 914 | |
| 915 | static const unsigned char s390_ft_main_31[] = { |
| 916 | /* Load the literals into registers. */ |
| 917 | 0x58, 0x50, 0x10, 0x00, /* l %r5, 0x0(%r1) */ |
| 918 | 0x58, 0x20, 0x10, 0x04, /* l %r2, 0x4(%r1) */ |
| 919 | 0x58, 0x40, 0x10, 0x08, /* l %r4, 0x8(%r1) */ |
| 920 | 0x58, 0x60, 0x10, 0x0c, /* l %r6, 0xc(%r1) */ |
| 921 | /* Save original PSWA (tracepoint address | 0x80000000). */ |
| 922 | 0x50, 0x50, 0xf2, 0xcc, /* st %r5, 0x2cc(%r15) */ |
| 923 | /* Construct a collecting_t object at %r15+0x2e0. */ |
| 924 | 0x50, 0x20, 0xf2, 0xe0, /* st %r2, 0x2e0(%r15) */ |
| 925 | 0x9b, 0x00, 0xf2, 0xe4, /* stam %a0, %a0, 0x2e4(%r15) */ |
| 926 | /* Move its address to %r0. */ |
| 927 | 0x41, 0x00, 0xf2, 0xe0, /* la %r0, 0x2e0(%r15) */ |
| 928 | /* Take the lock. */ |
| 929 | /* .Lloop: */ |
| 930 | 0xa7, 0x18, 0x00, 0x00, /* lhi %r1, 0 */ |
| 931 | 0xba, 0x10, 0x60, 0x00, /* cs %r1, %r0, 0(%r6) */ |
| 932 | 0xa7, 0x74, 0xff, 0xfc, /* jne .Lloop */ |
| 933 | /* Address of the register save block to %r3. */ |
| 934 | 0x18, 0x3f, /* lr %r3, %r15 */ |
| 935 | /* Make a stack frame, so that we can call the collector. */ |
| 936 | 0xa7, 0xfa, 0xff, 0xa0, /* ahi %r15, -0x60 */ |
| 937 | /* Call it. */ |
| 938 | 0x0d, 0xe4, /* basr %r14, %r4 */ |
| 939 | /* And get rid of the stack frame again. */ |
| 940 | 0x41, 0xf0, 0xf0, 0x60, /* la %r15, 0x60(%r15) */ |
| 941 | /* Leave the lock. */ |
| 942 | 0x07, 0xf0, /* br %r0 */ |
| 943 | 0xa7, 0x18, 0x00, 0x00, /* lhi %r1, 0 */ |
| 944 | 0x50, 0x10, 0x60, 0x00, /* st %t1, 0(%r6) */ |
| 945 | }; |
| 946 | |
| 947 | /* Code sequence doing the collection call for 64-bit target. %r1 contains |
| 948 | the address of the literal pool. */ |
| 949 | |
| 950 | static const unsigned char s390_ft_main_64[] = { |
| 951 | /* Load the literals into registers. */ |
| 952 | 0xe3, 0x50, 0x10, 0x00, 0x00, 0x04, /* lg %r5, 0x00(%r1) */ |
| 953 | 0xe3, 0x20, 0x10, 0x08, 0x00, 0x04, /* lg %r2, 0x08(%r1) */ |
| 954 | 0xe3, 0x40, 0x10, 0x10, 0x00, 0x04, /* lg %r4, 0x10(%r1) */ |
| 955 | 0xe3, 0x60, 0x10, 0x18, 0x00, 0x04, /* lg %r6, 0x18(%r1) */ |
| 956 | /* Save original PSWA (tracepoint address). */ |
| 957 | 0xe3, 0x50, 0xf2, 0xc8, 0x00, 0x24, /* stg %r5, 0x2c8(%r15) */ |
| 958 | /* Construct a collecting_t object at %r15+0x2e0. */ |
| 959 | 0xe3, 0x20, 0xf2, 0xe0, 0x00, 0x24, /* stg %r2, 0x2e0(%r15) */ |
| 960 | 0x9b, 0x01, 0xf2, 0xe8, /* stam %a0, %a1, 0x2e8(%r15) */ |
| 961 | /* Move its address to %r0. */ |
| 962 | 0x41, 0x00, 0xf2, 0xe0, /* la %r0, 0x2e0(%r15) */ |
| 963 | /* Take the lock. */ |
| 964 | /* .Lloop: */ |
| 965 | 0xa7, 0x19, 0x00, 0x00, /* lghi %r1, 0 */ |
| 966 | 0xeb, 0x10, 0x60, 0x00, 0x00, 0x30, /* csg %r1, %r0, 0(%r6) */ |
| 967 | 0xa7, 0x74, 0xff, 0xfb, /* jne .Lloop */ |
| 968 | /* Address of the register save block to %r3. */ |
| 969 | 0xb9, 0x04, 0x00, 0x3f, /* lgr %r3, %r15 */ |
| 970 | /* Make a stack frame, so that we can call the collector. */ |
| 971 | 0xa7, 0xfb, 0xff, 0x60, /* aghi %r15, -0xa0 */ |
| 972 | /* Call it. */ |
| 973 | 0x0d, 0xe4, /* basr %r14, %r4 */ |
| 974 | /* And get rid of the stack frame again. */ |
| 975 | 0x41, 0xf0, 0xf0, 0xa0, /* la %r15, 0xa0(%r15) */ |
| 976 | /* Leave the lock. */ |
| 977 | 0x07, 0xf0, /* br %r0 */ |
| 978 | 0xa7, 0x19, 0x00, 0x00, /* lghi %r1, 0 */ |
| 979 | 0xe3, 0x10, 0x60, 0x00, 0x00, 0x24, /* stg %t1, 0(%r6) */ |
| 980 | }; |
| 981 | |
| 982 | /* Code sequence restoring FRs, for targets with no VX support. */ |
| 983 | |
| 984 | static const unsigned char s390_ft_exit_fr[] = { |
| 985 | 0x68, 0x00, 0xf0, 0x00, /* ld %f0, 0x000(%r15) */ |
| 986 | 0x68, 0x10, 0xf0, 0x10, /* ld %f1, 0x010(%r15) */ |
| 987 | 0x68, 0x20, 0xf0, 0x20, /* ld %f2, 0x020(%r15) */ |
| 988 | 0x68, 0x30, 0xf0, 0x30, /* ld %f3, 0x030(%r15) */ |
| 989 | 0x68, 0x40, 0xf0, 0x40, /* ld %f4, 0x040(%r15) */ |
| 990 | 0x68, 0x50, 0xf0, 0x50, /* ld %f5, 0x050(%r15) */ |
| 991 | 0x68, 0x60, 0xf0, 0x60, /* ld %f6, 0x060(%r15) */ |
| 992 | 0x68, 0x70, 0xf0, 0x70, /* ld %f7, 0x070(%r15) */ |
| 993 | 0x68, 0x80, 0xf0, 0x80, /* ld %f8, 0x080(%r15) */ |
| 994 | 0x68, 0x90, 0xf0, 0x90, /* ld %f9, 0x090(%r15) */ |
| 995 | 0x68, 0xa0, 0xf0, 0xa0, /* ld %f10, 0x0a0(%r15) */ |
| 996 | 0x68, 0xb0, 0xf0, 0xb0, /* ld %f11, 0x0b0(%r15) */ |
| 997 | 0x68, 0xc0, 0xf0, 0xc0, /* ld %f12, 0x0c0(%r15) */ |
| 998 | 0x68, 0xd0, 0xf0, 0xd0, /* ld %f13, 0x0d0(%r15) */ |
| 999 | 0x68, 0xe0, 0xf0, 0xe0, /* ld %f14, 0x0e0(%r15) */ |
| 1000 | 0x68, 0xf0, 0xf0, 0xf0, /* ld %f15, 0x0f0(%r15) */ |
| 1001 | }; |
| 1002 | |
| 1003 | /* Code sequence restoring VRs. */ |
| 1004 | |
| 1005 | static const unsigned char s390_ft_exit_vr[] = { |
| 1006 | 0xe7, 0x0f, 0xf0, 0x00, 0x00, 0x36, /* vlm %v0, %v15, 0x000(%r15) */ |
| 1007 | 0xe7, 0x0f, 0xf1, 0x00, 0x0c, 0x36, /* vlm %v16, %v31, 0x100(%r15) */ |
| 1008 | }; |
| 1009 | |
| 1010 | /* Code sequence restoring misc registers. As for PSWM, only CC should be |
| 1011 | modified by C code, so we use the alr instruction to restore it by |
| 1012 | manufacturing an operand that'll result in the original flags. */ |
| 1013 | |
| 1014 | static const unsigned char s390_ft_exit_misc[] = { |
| 1015 | 0xb2, 0x9d, 0xf2, 0xd0, /* lfpc 0x2d0(%r15) */ |
| 1016 | 0x58, 0x00, 0xf2, 0xc0, /* l %r0, 0x2c0(%r15) */ |
| 1017 | /* Extract CC to high 2 bits of %r0. */ |
| 1018 | 0x88, 0x00, 0x00, 0x0c, /* srl %r0, 12 */ |
| 1019 | 0x89, 0x00, 0x00, 0x1e, /* sll %r0, 30 */ |
| 1020 | /* Add %r0 to itself. Result will be nonzero iff CC bit 0 is set, and |
| 1021 | will have carry iff CC bit 1 is set - resulting in the same flags |
| 1022 | as the original. */ |
| 1023 | 0x1e, 0x00, /* alr %r0, %r0 */ |
| 1024 | 0x9a, 0x0f, 0xf2, 0x80, /* lam %a0, %a15, 0x280(%r15) */ |
| 1025 | }; |
| 1026 | |
| 1027 | /* Code sequence restoring GPRs, for 31-bit targets with no high GPRs. */ |
| 1028 | |
| 1029 | static const unsigned char s390_ft_exit_gpr_esa[] = { |
| 1030 | 0x58, 0x00, 0xf2, 0x04, /* l %r0, 0x204(%r15) */ |
| 1031 | 0x58, 0x10, 0xf2, 0x0c, /* l %r1, 0x20c(%r15) */ |
| 1032 | 0x58, 0x20, 0xf2, 0x14, /* l %r2, 0x214(%r15) */ |
| 1033 | 0x58, 0x30, 0xf2, 0x1c, /* l %r3, 0x21c(%r15) */ |
| 1034 | 0x58, 0x40, 0xf2, 0x24, /* l %r4, 0x224(%r15) */ |
| 1035 | 0x58, 0x50, 0xf2, 0x2c, /* l %r5, 0x22c(%r15) */ |
| 1036 | 0x58, 0x60, 0xf2, 0x34, /* l %r6, 0x234(%r15) */ |
| 1037 | 0x58, 0x70, 0xf2, 0x3c, /* l %r7, 0x23c(%r15) */ |
| 1038 | 0x58, 0x80, 0xf2, 0x44, /* l %r8, 0x244(%r15) */ |
| 1039 | 0x58, 0x90, 0xf2, 0x4c, /* l %r9, 0x24c(%r15) */ |
| 1040 | 0x58, 0xa0, 0xf2, 0x54, /* l %r10, 0x254(%r15) */ |
| 1041 | 0x58, 0xb0, 0xf2, 0x5c, /* l %r11, 0x25c(%r15) */ |
| 1042 | 0x58, 0xc0, 0xf2, 0x64, /* l %r12, 0x264(%r15) */ |
| 1043 | 0x58, 0xd0, 0xf2, 0x6c, /* l %r13, 0x26c(%r15) */ |
| 1044 | 0x58, 0xe0, 0xf2, 0x74, /* l %r14, 0x274(%r15) */ |
| 1045 | 0x58, 0xf0, 0xf2, 0x7c, /* l %r15, 0x27c(%r15) */ |
| 1046 | }; |
| 1047 | |
| 1048 | /* Code sequence restoring GPRs, for 64-bit targets and 31-bit targets |
| 1049 | with high GPRs. */ |
| 1050 | |
| 1051 | static const unsigned char s390_ft_exit_gpr_zarch[] = { |
| 1052 | 0xeb, 0x0f, 0xf2, 0x00, 0x00, 0x04, /* lmg %r0, %r15, 0x200(%r15) */ |
| 1053 | }; |
| 1054 | |
| 1055 | /* Writes instructions to target, updating the to pointer. */ |
| 1056 | |
| 1057 | static void |
| 1058 | append_insns (CORE_ADDR *to, size_t len, const unsigned char *buf) |
| 1059 | { |
| 1060 | target_write_memory (*to, buf, len); |
| 1061 | *to += len; |
| 1062 | } |
| 1063 | |
| 1064 | /* Relocates an instruction from oldloc to *to, updating to. */ |
| 1065 | |
| 1066 | static int |
| 1067 | s390_relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc, int is_64) |
| 1068 | { |
| 1069 | gdb_byte buf[6]; |
| 1070 | int ilen; |
| 1071 | int op2; |
| 1072 | /* 0: no fixup, 1: PC16DBL fixup, 2: PC32DBL fixup. */ |
| 1073 | int mode = 0; |
| 1074 | int is_bras = 0; |
| 1075 | read_inferior_memory (oldloc, buf, sizeof buf); |
| 1076 | if (buf[0] < 0x40) |
| 1077 | ilen = 2; |
| 1078 | else if (buf[0] < 0xc0) |
| 1079 | ilen = 4; |
| 1080 | else |
| 1081 | ilen = 6; |
| 1082 | switch (buf[0]) |
| 1083 | { |
| 1084 | case 0x05: /* BALR */ |
| 1085 | case 0x0c: /* BASSM */ |
| 1086 | case 0x0d: /* BASR */ |
| 1087 | case 0x45: /* BAL */ |
| 1088 | case 0x4d: /* BAS */ |
| 1089 | /* These save a return address and mess around with registers. |
| 1090 | We can't relocate them. */ |
| 1091 | return 1; |
| 1092 | case 0x84: /* BRXH */ |
| 1093 | case 0x85: /* BRXLE */ |
| 1094 | mode = 1; |
| 1095 | break; |
| 1096 | case 0xa7: |
| 1097 | op2 = buf[1] & 0xf; |
| 1098 | /* BRC, BRAS, BRCT, BRCTG */ |
| 1099 | if (op2 >= 4 && op2 <= 7) |
| 1100 | mode = 1; |
| 1101 | /* BRAS */ |
| 1102 | if (op2 == 5) |
| 1103 | is_bras = 1; |
| 1104 | break; |
| 1105 | case 0xc0: |
| 1106 | op2 = buf[1] & 0xf; |
| 1107 | /* LARL, BRCL, BRASL */ |
| 1108 | if (op2 == 0 || op2 == 4 || op2 == 5) |
| 1109 | mode = 2; |
| 1110 | /* BRASL */ |
| 1111 | if (op2 == 5) |
| 1112 | is_bras = 1; |
| 1113 | break; |
| 1114 | case 0xc4: |
| 1115 | case 0xc6: |
| 1116 | /* PC-relative addressing instructions. */ |
| 1117 | mode = 2; |
| 1118 | break; |
| 1119 | case 0xc5: /* BPRP */ |
| 1120 | case 0xc7: /* BPP */ |
| 1121 | /* Branch prediction - just skip it. */ |
| 1122 | return 0; |
| 1123 | case 0xcc: |
| 1124 | op2 = buf[1] & 0xf; |
| 1125 | /* BRCTH */ |
| 1126 | if (op2 == 6) |
| 1127 | mode = 2; |
| 1128 | break; |
| 1129 | case 0xec: |
| 1130 | op2 = buf[5]; |
| 1131 | switch (op2) |
| 1132 | { |
| 1133 | case 0x44: /* BRXHG */ |
| 1134 | case 0x45: /* BRXLG */ |
| 1135 | case 0x64: /* CGRJ */ |
| 1136 | case 0x65: /* CLGRJ */ |
| 1137 | case 0x76: /* CRJ */ |
| 1138 | case 0x77: /* CLRJ */ |
| 1139 | mode = 1; |
| 1140 | break; |
| 1141 | } |
| 1142 | break; |
| 1143 | } |
| 1144 | |
| 1145 | if (mode != 0) |
| 1146 | { |
| 1147 | /* We'll have to relocate an instruction with a PC-relative field. |
| 1148 | First, compute the target. */ |
| 1149 | int64_t loffset = 0; |
| 1150 | CORE_ADDR target; |
| 1151 | if (mode == 1) |
| 1152 | { |
| 1153 | int16_t soffset = 0; |
| 1154 | memcpy (&soffset, buf + 2, 2); |
| 1155 | loffset = soffset; |
| 1156 | } |
| 1157 | else if (mode == 2) |
| 1158 | { |
| 1159 | int32_t soffset = 0; |
| 1160 | memcpy (&soffset, buf + 2, 4); |
| 1161 | loffset = soffset; |
| 1162 | } |
| 1163 | target = oldloc + loffset * 2; |
| 1164 | if (!is_64) |
| 1165 | target &= 0x7fffffff; |
| 1166 | |
| 1167 | if (is_bras) |
| 1168 | { |
| 1169 | /* BRAS or BRASL was used. We cannot just relocate those, since |
| 1170 | they save the return address in a register. We can, however, |
| 1171 | replace them with a LARL+JG sequence. */ |
| 1172 | |
| 1173 | /* Make the LARL. */ |
| 1174 | int32_t soffset; |
| 1175 | buf[0] = 0xc0; |
| 1176 | buf[1] &= 0xf0; |
| 1177 | loffset = oldloc + ilen - *to; |
| 1178 | loffset >>= 1; |
| 1179 | soffset = loffset; |
| 1180 | if (soffset != loffset && is_64) |
| 1181 | return 1; |
| 1182 | memcpy (buf + 2, &soffset, 4); |
| 1183 | append_insns (to, 6, buf); |
| 1184 | |
| 1185 | /* Note: this is not fully correct. In 31-bit mode, LARL will write |
| 1186 | an address with the top bit 0, while BRAS/BRASL will write it |
| 1187 | with top bit 1. It should not matter much, since linux compilers |
| 1188 | use BR and not BSM to return from functions, but it could confuse |
| 1189 | some poor stack unwinder. */ |
| 1190 | |
| 1191 | /* We'll now be writing a JG. */ |
| 1192 | mode = 2; |
| 1193 | buf[0] = 0xc0; |
| 1194 | buf[1] = 0xf4; |
| 1195 | ilen = 6; |
| 1196 | } |
| 1197 | |
| 1198 | /* Compute the new offset and write it to the buffer. */ |
| 1199 | loffset = target - *to; |
| 1200 | loffset >>= 1; |
| 1201 | |
| 1202 | if (mode == 1) |
| 1203 | { |
| 1204 | int16_t soffset = loffset; |
| 1205 | if (soffset != loffset) |
| 1206 | return 1; |
| 1207 | memcpy (buf + 2, &soffset, 2); |
| 1208 | } |
| 1209 | else if (mode == 2) |
| 1210 | { |
| 1211 | int32_t soffset = loffset; |
| 1212 | if (soffset != loffset && is_64) |
| 1213 | return 1; |
| 1214 | memcpy (buf + 2, &soffset, 4); |
| 1215 | } |
| 1216 | } |
| 1217 | append_insns (to, ilen, buf); |
| 1218 | return 0; |
| 1219 | } |
| 1220 | |
| 1221 | /* Implementation of linux_target_ops method |
| 1222 | "install_fast_tracepoint_jump_pad". */ |
| 1223 | |
| 1224 | static int |
| 1225 | s390_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, |
| 1226 | CORE_ADDR tpaddr, |
| 1227 | CORE_ADDR collector, |
| 1228 | CORE_ADDR lockaddr, |
| 1229 | ULONGEST orig_size, |
| 1230 | CORE_ADDR *jump_entry, |
| 1231 | CORE_ADDR *trampoline, |
| 1232 | ULONGEST *trampoline_size, |
| 1233 | unsigned char *jjump_pad_insn, |
| 1234 | ULONGEST *jjump_pad_insn_size, |
| 1235 | CORE_ADDR *adjusted_insn_addr, |
| 1236 | CORE_ADDR *adjusted_insn_addr_end, |
| 1237 | char *err) |
| 1238 | { |
| 1239 | int i; |
| 1240 | int64_t loffset; |
| 1241 | int32_t offset; |
| 1242 | unsigned char jbuf[6] = { 0xc0, 0xf4, 0, 0, 0, 0 }; /* jg ... */ |
| 1243 | CORE_ADDR buildaddr = *jump_entry; |
| 1244 | #ifdef __s390x__ |
| 1245 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 1246 | int is_64 = register_size (regcache->tdesc, 0) == 8; |
| 1247 | int is_zarch = is_64 || have_hwcap_s390_high_gprs; |
| 1248 | int has_vx = have_hwcap_s390_vx; |
| 1249 | #else |
| 1250 | int is_64 = 0, is_zarch = 0, has_vx = 0; |
| 1251 | #endif |
| 1252 | CORE_ADDR literals[4] = { |
| 1253 | tpaddr, |
| 1254 | tpoint, |
| 1255 | collector, |
| 1256 | lockaddr, |
| 1257 | }; |
| 1258 | |
| 1259 | /* First, store the GPRs. */ |
| 1260 | if (is_zarch) |
| 1261 | append_insns (&buildaddr, sizeof s390_ft_entry_gpr_zarch, |
| 1262 | s390_ft_entry_gpr_zarch); |
| 1263 | else |
| 1264 | append_insns (&buildaddr, sizeof s390_ft_entry_gpr_esa, |
| 1265 | s390_ft_entry_gpr_esa); |
| 1266 | |
| 1267 | /* Second, misc registers (ARs, PSWM, FPC). PSWA will be stored below. */ |
| 1268 | append_insns (&buildaddr, sizeof s390_ft_entry_misc, s390_ft_entry_misc); |
| 1269 | |
| 1270 | /* Third, FRs or VRs. */ |
| 1271 | if (has_vx) |
| 1272 | append_insns (&buildaddr, sizeof s390_ft_entry_vr, s390_ft_entry_vr); |
| 1273 | else |
| 1274 | append_insns (&buildaddr, sizeof s390_ft_entry_fr, s390_ft_entry_fr); |
| 1275 | |
| 1276 | /* Now, the main part of code - store PSWA, take lock, call collector, |
| 1277 | leave lock. First, we'll need to fetch 4 literals. */ |
| 1278 | if (is_64) { |
| 1279 | unsigned char buf[] = { |
| 1280 | 0x07, 0x07, /* nopr %r7 */ |
| 1281 | 0x07, 0x07, /* nopr %r7 */ |
| 1282 | 0x07, 0x07, /* nopr %r7 */ |
| 1283 | 0xa7, 0x15, 0x00, 0x12, /* bras %r1, .Lend */ |
| 1284 | 0, 0, 0, 0, 0, 0, 0, 0, /* tpaddr */ |
| 1285 | 0, 0, 0, 0, 0, 0, 0, 0, /* tpoint */ |
| 1286 | 0, 0, 0, 0, 0, 0, 0, 0, /* collector */ |
| 1287 | 0, 0, 0, 0, 0, 0, 0, 0, /* lockaddr */ |
| 1288 | /* .Lend: */ |
| 1289 | }; |
| 1290 | /* Find the proper start place in buf, so that literals will be |
| 1291 | aligned. */ |
| 1292 | int bufpos = (buildaddr + 2) & 7; |
| 1293 | /* Stuff the literals into the buffer. */ |
| 1294 | for (i = 0; i < 4; i++) { |
| 1295 | uint64_t lit = literals[i]; |
| 1296 | memcpy (&buf[sizeof buf - 32 + i * 8], &lit, 8); |
| 1297 | } |
| 1298 | append_insns (&buildaddr, sizeof buf - bufpos, buf + bufpos); |
| 1299 | append_insns (&buildaddr, sizeof s390_ft_main_64, s390_ft_main_64); |
| 1300 | } else { |
| 1301 | unsigned char buf[] = { |
| 1302 | 0x07, 0x07, /* nopr %r7 */ |
| 1303 | 0xa7, 0x15, 0x00, 0x0a, /* bras %r1, .Lend */ |
| 1304 | 0, 0, 0, 0, /* tpaddr */ |
| 1305 | 0, 0, 0, 0, /* tpoint */ |
| 1306 | 0, 0, 0, 0, /* collector */ |
| 1307 | 0, 0, 0, 0, /* lockaddr */ |
| 1308 | /* .Lend: */ |
| 1309 | }; |
| 1310 | /* Find the proper start place in buf, so that literals will be |
| 1311 | aligned. */ |
| 1312 | int bufpos = (buildaddr + 2) & 3; |
| 1313 | /* First literal will be saved as the PSWA, make sure it has the high bit |
| 1314 | set. */ |
| 1315 | literals[0] |= 0x80000000; |
| 1316 | /* Stuff the literals into the buffer. */ |
| 1317 | for (i = 0; i < 4; i++) { |
| 1318 | uint32_t lit = literals[i]; |
| 1319 | memcpy (&buf[sizeof buf - 16 + i * 4], &lit, 4); |
| 1320 | } |
| 1321 | append_insns (&buildaddr, sizeof buf - bufpos, buf + bufpos); |
| 1322 | append_insns (&buildaddr, sizeof s390_ft_main_31, s390_ft_main_31); |
| 1323 | } |
| 1324 | |
| 1325 | /* Restore FRs or VRs. */ |
| 1326 | if (has_vx) |
| 1327 | append_insns (&buildaddr, sizeof s390_ft_exit_vr, s390_ft_exit_vr); |
| 1328 | else |
| 1329 | append_insns (&buildaddr, sizeof s390_ft_exit_fr, s390_ft_exit_fr); |
| 1330 | |
| 1331 | /* Restore misc registers. */ |
| 1332 | append_insns (&buildaddr, sizeof s390_ft_exit_misc, s390_ft_exit_misc); |
| 1333 | |
| 1334 | /* Restore the GPRs. */ |
| 1335 | if (is_zarch) |
| 1336 | append_insns (&buildaddr, sizeof s390_ft_exit_gpr_zarch, |
| 1337 | s390_ft_exit_gpr_zarch); |
| 1338 | else |
| 1339 | append_insns (&buildaddr, sizeof s390_ft_exit_gpr_esa, |
| 1340 | s390_ft_exit_gpr_esa); |
| 1341 | |
| 1342 | /* Now, adjust the original instruction to execute in the jump |
| 1343 | pad. */ |
| 1344 | *adjusted_insn_addr = buildaddr; |
| 1345 | if (s390_relocate_instruction (&buildaddr, tpaddr, is_64)) |
| 1346 | { |
| 1347 | sprintf (err, "E.Could not relocate instruction for tracepoint."); |
| 1348 | return 1; |
| 1349 | } |
| 1350 | *adjusted_insn_addr_end = buildaddr; |
| 1351 | |
| 1352 | /* Finally, write a jump back to the program. */ |
| 1353 | |
| 1354 | loffset = (tpaddr + orig_size) - buildaddr; |
| 1355 | loffset >>= 1; |
| 1356 | offset = loffset; |
| 1357 | if (is_64 && offset != loffset) |
| 1358 | { |
| 1359 | sprintf (err, |
| 1360 | "E.Jump back from jump pad too far from tracepoint " |
| 1361 | "(offset 0x%" PRIx64 " > int33).", loffset); |
| 1362 | return 1; |
| 1363 | } |
| 1364 | memcpy (jbuf + 2, &offset, 4); |
| 1365 | append_insns (&buildaddr, sizeof jbuf, jbuf); |
| 1366 | |
| 1367 | /* The jump pad is now built. Wire in a jump to our jump pad. This |
| 1368 | is always done last (by our caller actually), so that we can |
| 1369 | install fast tracepoints with threads running. This relies on |
| 1370 | the agent's atomic write support. */ |
| 1371 | loffset = *jump_entry - tpaddr; |
| 1372 | loffset >>= 1; |
| 1373 | offset = loffset; |
| 1374 | if (is_64 && offset != loffset) |
| 1375 | { |
| 1376 | sprintf (err, |
| 1377 | "E.Jump back from jump pad too far from tracepoint " |
| 1378 | "(offset 0x%" PRIx64 " > int33).", loffset); |
| 1379 | return 1; |
| 1380 | } |
| 1381 | memcpy (jbuf + 2, &offset, 4); |
| 1382 | memcpy (jjump_pad_insn, jbuf, sizeof jbuf); |
| 1383 | *jjump_pad_insn_size = sizeof jbuf; |
| 1384 | |
| 1385 | /* Return the end address of our pad. */ |
| 1386 | *jump_entry = buildaddr; |
| 1387 | |
| 1388 | return 0; |
| 1389 | } |
| 1390 | |
| 1391 | /* Implementation of linux_target_ops method |
| 1392 | "get_min_fast_tracepoint_insn_len". */ |
| 1393 | |
| 1394 | static int |
| 1395 | s390_get_min_fast_tracepoint_insn_len (void) |
| 1396 | { |
| 1397 | /* We only support using 6-byte jumps to reach the tracepoint code. |
| 1398 | If the tracepoint buffer were allocated sufficiently close (64kiB) |
| 1399 | to the executable code, and the traced instruction itself was close |
| 1400 | enough to the beginning, we could use 4-byte jumps, but this doesn't |
| 1401 | seem to be worth the effort. */ |
| 1402 | return 6; |
| 1403 | } |
| 1404 | |
| 1405 | /* Implementation of linux_target_ops method "get_ipa_tdesc_idx". */ |
| 1406 | |
| 1407 | static int |
| 1408 | s390_get_ipa_tdesc_idx (void) |
| 1409 | { |
| 1410 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 1411 | const struct target_desc *tdesc = regcache->tdesc; |
| 1412 | |
| 1413 | #ifdef __s390x__ |
| 1414 | if (tdesc == tdesc_s390x_linux64) |
| 1415 | return S390_TDESC_64; |
| 1416 | if (tdesc == tdesc_s390x_linux64v1) |
| 1417 | return S390_TDESC_64V1; |
| 1418 | if (tdesc == tdesc_s390x_linux64v2) |
| 1419 | return S390_TDESC_64V2; |
| 1420 | if (tdesc == tdesc_s390x_te_linux64) |
| 1421 | return S390_TDESC_TE; |
| 1422 | if (tdesc == tdesc_s390x_vx_linux64) |
| 1423 | return S390_TDESC_VX; |
| 1424 | if (tdesc == tdesc_s390x_tevx_linux64) |
| 1425 | return S390_TDESC_TEVX; |
| 1426 | if (tdesc == tdesc_s390x_gs_linux64) |
| 1427 | return S390_TDESC_GS; |
| 1428 | #endif |
| 1429 | |
| 1430 | if (tdesc == tdesc_s390_linux32) |
| 1431 | return S390_TDESC_32; |
| 1432 | if (tdesc == tdesc_s390_linux32v1) |
| 1433 | return S390_TDESC_32V1; |
| 1434 | if (tdesc == tdesc_s390_linux32v2) |
| 1435 | return S390_TDESC_32V2; |
| 1436 | if (tdesc == tdesc_s390_linux64) |
| 1437 | return S390_TDESC_64; |
| 1438 | if (tdesc == tdesc_s390_linux64v1) |
| 1439 | return S390_TDESC_64V1; |
| 1440 | if (tdesc == tdesc_s390_linux64v2) |
| 1441 | return S390_TDESC_64V2; |
| 1442 | if (tdesc == tdesc_s390_te_linux64) |
| 1443 | return S390_TDESC_TE; |
| 1444 | if (tdesc == tdesc_s390_vx_linux64) |
| 1445 | return S390_TDESC_VX; |
| 1446 | if (tdesc == tdesc_s390_tevx_linux64) |
| 1447 | return S390_TDESC_TEVX; |
| 1448 | if (tdesc == tdesc_s390_gs_linux64) |
| 1449 | return S390_TDESC_GS; |
| 1450 | |
| 1451 | return 0; |
| 1452 | } |
| 1453 | |
| 1454 | /* Appends given buffer to current_insn_ptr in the target. */ |
| 1455 | |
| 1456 | static void |
| 1457 | add_insns (const unsigned char *start, int len) |
| 1458 | { |
| 1459 | CORE_ADDR buildaddr = current_insn_ptr; |
| 1460 | |
| 1461 | if (debug_threads) |
| 1462 | debug_printf ("Adding %d bytes of insn at %s\n", |
| 1463 | len, paddress (buildaddr)); |
| 1464 | |
| 1465 | append_insns (&buildaddr, len, start); |
| 1466 | current_insn_ptr = buildaddr; |
| 1467 | } |
| 1468 | |
| 1469 | /* Register usage in emit: |
| 1470 | |
| 1471 | - %r0, %r1: temp |
| 1472 | - %r2: top of stack (high word for 31-bit) |
| 1473 | - %r3: low word of top of stack (for 31-bit) |
| 1474 | - %r4, %r5: temp |
| 1475 | - %r6, %r7, %r8: don't use |
| 1476 | - %r9: saved arg1 |
| 1477 | - %r10: saved arg2 |
| 1478 | - %r11: frame pointer |
| 1479 | - %r12: saved top of stack for void_call_2 (high word for 31-bit) |
| 1480 | - %r13: low word of saved top of stack (for 31-bit) |
| 1481 | - %r14: return address for calls |
| 1482 | - %r15: stack pointer |
| 1483 | |
| 1484 | */ |
| 1485 | |
| 1486 | /* The "emit_prologue" emit_ops method for s390. */ |
| 1487 | |
| 1488 | static void |
| 1489 | s390_emit_prologue (void) |
| 1490 | { |
| 1491 | static const unsigned char buf[] = { |
| 1492 | 0x90, 0x9f, 0xf0, 0x24, /* stm %r9, %r15, 0x24(%r15) */ |
| 1493 | 0x18, 0x92, /* lr %r9, %r2 */ |
| 1494 | 0x18, 0xa3, /* lr %r10, %r3 */ |
| 1495 | 0x18, 0xbf, /* lr %r11, %r15 */ |
| 1496 | }; |
| 1497 | add_insns (buf, sizeof buf); |
| 1498 | } |
| 1499 | |
| 1500 | /* The "emit_epilogue" emit_ops method for s390. */ |
| 1501 | |
| 1502 | static void |
| 1503 | s390_emit_epilogue (void) |
| 1504 | { |
| 1505 | static const unsigned char buf[] = { |
| 1506 | 0x90, 0x23, 0xa0, 0x00, /* stm %r2, %r3, 0(%r10) */ |
| 1507 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1508 | 0x98, 0x9f, 0xb0, 0x24, /* lm %r9, %r15, 0x24(%r11) */ |
| 1509 | 0x07, 0xfe, /* br %r14 */ |
| 1510 | }; |
| 1511 | add_insns (buf, sizeof buf); |
| 1512 | } |
| 1513 | |
| 1514 | /* The "emit_add" emit_ops method for s390. */ |
| 1515 | |
| 1516 | static void |
| 1517 | s390_emit_add (void) |
| 1518 | { |
| 1519 | static const unsigned char buf[] = { |
| 1520 | 0x5e, 0x30, 0xf0, 0x04, /* al %r3, 4(%r15) */ |
| 1521 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x98, /* al %r2, 0(%r15) */ |
| 1522 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1523 | }; |
| 1524 | add_insns (buf, sizeof buf); |
| 1525 | } |
| 1526 | |
| 1527 | /* The "emit_sub" emit_ops method for s390. */ |
| 1528 | |
| 1529 | static void |
| 1530 | s390_emit_sub (void) |
| 1531 | { |
| 1532 | static const unsigned char buf[] = { |
| 1533 | 0x98, 0x45, 0xf0, 0x00, /* lm %r4, %r5, 0(%r15) */ |
| 1534 | 0x1f, 0x53, /* slr %r5, %r3 */ |
| 1535 | 0xb9, 0x99, 0x00, 0x42, /* slbr %r4, %r2 */ |
| 1536 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1537 | 0x18, 0x35, /* lr %r3, %r5 */ |
| 1538 | 0x18, 0x24, /* lr %r2, %r4 */ |
| 1539 | }; |
| 1540 | add_insns (buf, sizeof buf); |
| 1541 | } |
| 1542 | |
| 1543 | /* The "emit_mul" emit_ops method for s390. */ |
| 1544 | |
| 1545 | static void |
| 1546 | s390_emit_mul (void) |
| 1547 | { |
| 1548 | emit_error = 1; |
| 1549 | } |
| 1550 | |
| 1551 | /* The "emit_lsh" emit_ops method for s390. */ |
| 1552 | |
| 1553 | static void |
| 1554 | s390_emit_lsh (void) |
| 1555 | { |
| 1556 | static const unsigned char buf[] = { |
| 1557 | 0x18, 0x43, /* lr %r4, %r3 */ |
| 1558 | 0x98, 0x23, 0xf0, 0x00, /* lm %r2, %r3, 0(%r15) */ |
| 1559 | 0x8d, 0x20, 0x40, 0x00, /* sldl %r2, 0(%r4) */ |
| 1560 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1561 | }; |
| 1562 | add_insns (buf, sizeof buf); |
| 1563 | } |
| 1564 | |
| 1565 | /* The "emit_rsh_signed" emit_ops method for s390. */ |
| 1566 | |
| 1567 | static void |
| 1568 | s390_emit_rsh_signed (void) |
| 1569 | { |
| 1570 | static const unsigned char buf[] = { |
| 1571 | 0x18, 0x43, /* lr %r4, %r3 */ |
| 1572 | 0x98, 0x23, 0xf0, 0x00, /* lm %r2, %r3, 0(%r15) */ |
| 1573 | 0x8e, 0x20, 0x40, 0x00, /* srda %r2, 0(%r4) */ |
| 1574 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1575 | }; |
| 1576 | add_insns (buf, sizeof buf); |
| 1577 | } |
| 1578 | |
| 1579 | /* The "emit_rsh_unsigned" emit_ops method for s390. */ |
| 1580 | |
| 1581 | static void |
| 1582 | s390_emit_rsh_unsigned (void) |
| 1583 | { |
| 1584 | static const unsigned char buf[] = { |
| 1585 | 0x18, 0x43, /* lr %r4, %r3 */ |
| 1586 | 0x98, 0x23, 0xf0, 0x00, /* lm %r2, %r3, 0(%r15) */ |
| 1587 | 0x8c, 0x20, 0x40, 0x00, /* srdl %r2, 0(%r4) */ |
| 1588 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1589 | }; |
| 1590 | add_insns (buf, sizeof buf); |
| 1591 | } |
| 1592 | |
| 1593 | /* The "emit_ext" emit_ops method for s390. */ |
| 1594 | |
| 1595 | static void |
| 1596 | s390_emit_ext (int arg) |
| 1597 | { |
| 1598 | unsigned char buf[] = { |
| 1599 | 0x8d, 0x20, 0x00, (unsigned char) (64 - arg), /* sldl %r2, <64-arg> */ |
| 1600 | 0x8e, 0x20, 0x00, (unsigned char) (64 - arg), /* srda %r2, <64-arg> */ |
| 1601 | }; |
| 1602 | add_insns (buf, sizeof buf); |
| 1603 | } |
| 1604 | |
| 1605 | /* The "emit_log_not" emit_ops method for s390. */ |
| 1606 | |
| 1607 | static void |
| 1608 | s390_emit_log_not (void) |
| 1609 | { |
| 1610 | static const unsigned char buf[] = { |
| 1611 | 0x16, 0x23, /* or %r2, %r3 */ |
| 1612 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1613 | 0xa7, 0x38, 0x00, 0x00, /* lhi %r3, 0 */ |
| 1614 | 0xa7, 0x74, 0x00, 0x04, /* jne .Lskip */ |
| 1615 | 0xa7, 0x38, 0x00, 0x01, /* lhi %r3, 1 */ |
| 1616 | /* .Lskip: */ |
| 1617 | }; |
| 1618 | add_insns (buf, sizeof buf); |
| 1619 | } |
| 1620 | |
| 1621 | /* The "emit_bit_and" emit_ops method for s390. */ |
| 1622 | |
| 1623 | static void |
| 1624 | s390_emit_bit_and (void) |
| 1625 | { |
| 1626 | static const unsigned char buf[] = { |
| 1627 | 0x54, 0x20, 0xf0, 0x00, /* n %r2, 0(%r15) */ |
| 1628 | 0x54, 0x30, 0xf0, 0x04, /* n %r3, 4(%r15) */ |
| 1629 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1630 | }; |
| 1631 | add_insns (buf, sizeof buf); |
| 1632 | } |
| 1633 | |
| 1634 | /* The "emit_bit_or" emit_ops method for s390. */ |
| 1635 | |
| 1636 | static void |
| 1637 | s390_emit_bit_or (void) |
| 1638 | { |
| 1639 | static const unsigned char buf[] = { |
| 1640 | 0x56, 0x20, 0xf0, 0x00, /* o %r2, 0(%r15) */ |
| 1641 | 0x56, 0x30, 0xf0, 0x04, /* o %r3, 4(%r15) */ |
| 1642 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1643 | }; |
| 1644 | add_insns (buf, sizeof buf); |
| 1645 | } |
| 1646 | |
| 1647 | /* The "emit_bit_xor" emit_ops method for s390. */ |
| 1648 | |
| 1649 | static void |
| 1650 | s390_emit_bit_xor (void) |
| 1651 | { |
| 1652 | static const unsigned char buf[] = { |
| 1653 | 0x57, 0x20, 0xf0, 0x00, /* x %r2, 0(%r15) */ |
| 1654 | 0x57, 0x30, 0xf0, 0x04, /* x %r3, 4(%r15) */ |
| 1655 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1656 | }; |
| 1657 | add_insns (buf, sizeof buf); |
| 1658 | } |
| 1659 | |
| 1660 | /* The "emit_bit_not" emit_ops method for s390. */ |
| 1661 | |
| 1662 | static void |
| 1663 | s390_emit_bit_not (void) |
| 1664 | { |
| 1665 | static const unsigned char buf[] = { |
| 1666 | 0xa7, 0x48, 0xff, 0xff, /* lhi %r4, -1 */ |
| 1667 | 0x17, 0x24, /* xr %r2, %r4 */ |
| 1668 | 0x17, 0x34, /* xr %r3, %r4 */ |
| 1669 | }; |
| 1670 | add_insns (buf, sizeof buf); |
| 1671 | } |
| 1672 | |
| 1673 | /* The "emit_equal" emit_ops method for s390. */ |
| 1674 | |
| 1675 | static void |
| 1676 | s390_emit_equal (void) |
| 1677 | { |
| 1678 | s390_emit_bit_xor (); |
| 1679 | s390_emit_log_not (); |
| 1680 | } |
| 1681 | |
| 1682 | /* The "emit_less_signed" emit_ops method for s390. */ |
| 1683 | |
| 1684 | static void |
| 1685 | s390_emit_less_signed (void) |
| 1686 | { |
| 1687 | static const unsigned char buf[] = { |
| 1688 | 0x59, 0x20, 0xf0, 0x00, /* c %r2, 0(%r15) */ |
| 1689 | 0xa7, 0x24, 0x00, 0x0c, /* jh .Lless */ |
| 1690 | 0xa7, 0x44, 0x00, 0x06, /* jl .Lhigh */ |
| 1691 | 0x55, 0x30, 0xf0, 0x04, /* cl %r3, 4(%r15) */ |
| 1692 | 0xa7, 0x24, 0x00, 0x06, /* jh .Lless */ |
| 1693 | /* .Lhigh: */ |
| 1694 | 0xa7, 0x38, 0x00, 0x00, /* lhi %r3, 0 */ |
| 1695 | 0xa7, 0xf4, 0x00, 0x04, /* j .Lend */ |
| 1696 | /* .Lless: */ |
| 1697 | 0xa7, 0x38, 0x00, 0x01, /* lhi %r3, 1 */ |
| 1698 | /* .Lend: */ |
| 1699 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1700 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1701 | }; |
| 1702 | add_insns (buf, sizeof buf); |
| 1703 | } |
| 1704 | |
| 1705 | /* The "emit_less_unsigned" emit_ops method for s390. */ |
| 1706 | |
| 1707 | static void |
| 1708 | s390_emit_less_unsigned (void) |
| 1709 | { |
| 1710 | static const unsigned char buf[] = { |
| 1711 | 0x55, 0x20, 0xf0, 0x00, /* cl %r2, 0(%r15) */ |
| 1712 | 0xa7, 0x24, 0x00, 0x0c, /* jh .Lless */ |
| 1713 | 0xa7, 0x44, 0x00, 0x06, /* jl .Lhigh */ |
| 1714 | 0x55, 0x30, 0xf0, 0x04, /* cl %r3, 4(%r15) */ |
| 1715 | 0xa7, 0x24, 0x00, 0x06, /* jh .Lless */ |
| 1716 | /* .Lhigh: */ |
| 1717 | 0xa7, 0x38, 0x00, 0x00, /* lhi %r3, 0 */ |
| 1718 | 0xa7, 0xf4, 0x00, 0x04, /* j .Lend */ |
| 1719 | /* .Lless: */ |
| 1720 | 0xa7, 0x38, 0x00, 0x01, /* lhi %r3, 1 */ |
| 1721 | /* .Lend: */ |
| 1722 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1723 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1724 | }; |
| 1725 | add_insns (buf, sizeof buf); |
| 1726 | } |
| 1727 | |
| 1728 | /* The "emit_ref" emit_ops method for s390. */ |
| 1729 | |
| 1730 | static void |
| 1731 | s390_emit_ref (int size) |
| 1732 | { |
| 1733 | static const unsigned char buf1[] = { |
| 1734 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1735 | 0x43, 0x30, 0x30, 0x00, /* ic %r3, 0(%r3) */ |
| 1736 | }; |
| 1737 | static const unsigned char buf2[] = { |
| 1738 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1739 | 0x48, 0x30, 0x30, 0x00, /* lh %r3, 0(%r3) */ |
| 1740 | }; |
| 1741 | static const unsigned char buf4[] = { |
| 1742 | 0xa7, 0x28, 0x00, 0x00, /* lhi %r2, 0 */ |
| 1743 | 0x58, 0x30, 0x30, 0x00, /* l %r3, 0(%r3) */ |
| 1744 | }; |
| 1745 | static const unsigned char buf8[] = { |
| 1746 | 0x98, 0x23, 0x30, 0x00, /* lm %r2, %r3, 0(%r3) */ |
| 1747 | }; |
| 1748 | switch (size) |
| 1749 | { |
| 1750 | case 1: |
| 1751 | add_insns (buf1, sizeof buf1); |
| 1752 | break; |
| 1753 | case 2: |
| 1754 | add_insns (buf2, sizeof buf2); |
| 1755 | break; |
| 1756 | case 4: |
| 1757 | add_insns (buf4, sizeof buf4); |
| 1758 | break; |
| 1759 | case 8: |
| 1760 | add_insns (buf8, sizeof buf8); |
| 1761 | break; |
| 1762 | default: |
| 1763 | emit_error = 1; |
| 1764 | } |
| 1765 | } |
| 1766 | |
| 1767 | /* The "emit_if_goto" emit_ops method for s390. */ |
| 1768 | |
| 1769 | static void |
| 1770 | s390_emit_if_goto (int *offset_p, int *size_p) |
| 1771 | { |
| 1772 | static const unsigned char buf[] = { |
| 1773 | 0x16, 0x23, /* or %r2, %r3 */ |
| 1774 | 0x98, 0x23, 0xf0, 0x00, /* lm %r2, %r3, 0(%r15) */ |
| 1775 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1776 | 0xc0, 0x74, 0x00, 0x00, 0x00, 0x00 /* jgne <fillme> */ |
| 1777 | }; |
| 1778 | add_insns (buf, sizeof buf); |
| 1779 | if (offset_p) |
| 1780 | *offset_p = 12; |
| 1781 | if (size_p) |
| 1782 | *size_p = 4; |
| 1783 | } |
| 1784 | |
| 1785 | /* The "emit_goto" emit_ops method for s390 and s390x. */ |
| 1786 | |
| 1787 | static void |
| 1788 | s390_emit_goto (int *offset_p, int *size_p) |
| 1789 | { |
| 1790 | static const unsigned char buf[] = { |
| 1791 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg <fillme> */ |
| 1792 | }; |
| 1793 | add_insns (buf, sizeof buf); |
| 1794 | if (offset_p) |
| 1795 | *offset_p = 2; |
| 1796 | if (size_p) |
| 1797 | *size_p = 4; |
| 1798 | } |
| 1799 | |
| 1800 | /* The "write_goto_address" emit_ops method for s390 and s390x. */ |
| 1801 | |
| 1802 | static void |
| 1803 | s390_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) |
| 1804 | { |
| 1805 | long diff = ((long) (to - (from - 2))) / 2; |
| 1806 | int sdiff = diff; |
| 1807 | unsigned char buf[sizeof sdiff]; |
| 1808 | |
| 1809 | /* We're only doing 4-byte sizes at the moment. */ |
| 1810 | if (size != sizeof sdiff || sdiff != diff) |
| 1811 | { |
| 1812 | emit_error = 1; |
| 1813 | return; |
| 1814 | } |
| 1815 | |
| 1816 | memcpy (buf, &sdiff, sizeof sdiff); |
| 1817 | target_write_memory (from, buf, sizeof sdiff); |
| 1818 | } |
| 1819 | |
| 1820 | /* Preparation for emitting a literal pool of given size. Loads the address |
| 1821 | of the pool into %r1, and jumps over it. Called should emit the pool data |
| 1822 | immediately afterwards. Used for both s390 and s390x. */ |
| 1823 | |
| 1824 | static void |
| 1825 | s390_emit_litpool (int size) |
| 1826 | { |
| 1827 | static const unsigned char nop[] = { |
| 1828 | 0x07, 0x07, |
| 1829 | }; |
| 1830 | unsigned char buf[] = { |
| 1831 | 0xa7, 0x15, 0x00, |
| 1832 | (unsigned char) ((size + 4) / 2), /* bras %r1, .Lend+size */ |
| 1833 | /* .Lend: */ |
| 1834 | }; |
| 1835 | if (size == 4) |
| 1836 | { |
| 1837 | /* buf needs to start at even halfword for litpool to be aligned */ |
| 1838 | if (current_insn_ptr & 2) |
| 1839 | add_insns (nop, sizeof nop); |
| 1840 | } |
| 1841 | else |
| 1842 | { |
| 1843 | while ((current_insn_ptr & 6) != 4) |
| 1844 | add_insns (nop, sizeof nop); |
| 1845 | } |
| 1846 | add_insns (buf, sizeof buf); |
| 1847 | } |
| 1848 | |
| 1849 | /* The "emit_const" emit_ops method for s390. */ |
| 1850 | |
| 1851 | static void |
| 1852 | s390_emit_const (LONGEST num) |
| 1853 | { |
| 1854 | unsigned long long n = num; |
| 1855 | unsigned char buf_s[] = { |
| 1856 | /* lhi %r3, <num> */ |
| 1857 | 0xa7, 0x38, |
| 1858 | (unsigned char) (num >> 8), (unsigned char) num, |
| 1859 | /* xr %r2, %r2 */ |
| 1860 | 0x17, 0x22, |
| 1861 | }; |
| 1862 | static const unsigned char buf_l[] = { |
| 1863 | 0x98, 0x23, 0x10, 0x00, /* lm %r2, %r3, 0(%r1) */ |
| 1864 | }; |
| 1865 | if (num < 0x8000 && num >= 0) |
| 1866 | { |
| 1867 | add_insns (buf_s, sizeof buf_s); |
| 1868 | } |
| 1869 | else |
| 1870 | { |
| 1871 | s390_emit_litpool (8); |
| 1872 | add_insns ((unsigned char *) &n, sizeof n); |
| 1873 | add_insns (buf_l, sizeof buf_l); |
| 1874 | } |
| 1875 | } |
| 1876 | |
| 1877 | /* The "emit_call" emit_ops method for s390. */ |
| 1878 | |
| 1879 | static void |
| 1880 | s390_emit_call (CORE_ADDR fn) |
| 1881 | { |
| 1882 | unsigned int n = fn; |
| 1883 | static const unsigned char buf[] = { |
| 1884 | 0x58, 0x10, 0x10, 0x00, /* l %r1, 0(%r1) */ |
| 1885 | 0xa7, 0xfa, 0xff, 0xa0, /* ahi %r15, -0x60 */ |
| 1886 | 0x0d, 0xe1, /* basr %r14, %r1 */ |
| 1887 | 0xa7, 0xfa, 0x00, 0x60, /* ahi %r15, 0x60 */ |
| 1888 | }; |
| 1889 | s390_emit_litpool (4); |
| 1890 | add_insns ((unsigned char *) &n, sizeof n); |
| 1891 | add_insns (buf, sizeof buf); |
| 1892 | } |
| 1893 | |
| 1894 | /* The "emit_reg" emit_ops method for s390. */ |
| 1895 | |
| 1896 | static void |
| 1897 | s390_emit_reg (int reg) |
| 1898 | { |
| 1899 | unsigned char bufpre[] = { |
| 1900 | /* lr %r2, %r9 */ |
| 1901 | 0x18, 0x29, |
| 1902 | /* lhi %r3, <reg> */ |
| 1903 | 0xa7, 0x38, (unsigned char) (reg >> 8), (unsigned char) reg, |
| 1904 | }; |
| 1905 | add_insns (bufpre, sizeof bufpre); |
| 1906 | s390_emit_call (get_raw_reg_func_addr ()); |
| 1907 | } |
| 1908 | |
| 1909 | /* The "emit_pop" emit_ops method for s390. */ |
| 1910 | |
| 1911 | static void |
| 1912 | s390_emit_pop (void) |
| 1913 | { |
| 1914 | static const unsigned char buf[] = { |
| 1915 | 0x98, 0x23, 0xf0, 0x00, /* lm %r2, %r3, 0(%r15) */ |
| 1916 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 1917 | }; |
| 1918 | add_insns (buf, sizeof buf); |
| 1919 | } |
| 1920 | |
| 1921 | /* The "emit_stack_flush" emit_ops method for s390. */ |
| 1922 | |
| 1923 | static void |
| 1924 | s390_emit_stack_flush (void) |
| 1925 | { |
| 1926 | static const unsigned char buf[] = { |
| 1927 | 0xa7, 0xfa, 0xff, 0xf8, /* ahi %r15, -8 */ |
| 1928 | 0x90, 0x23, 0xf0, 0x00, /* stm %r2, %r3, 0(%r15) */ |
| 1929 | }; |
| 1930 | add_insns (buf, sizeof buf); |
| 1931 | } |
| 1932 | |
| 1933 | /* The "emit_zero_ext" emit_ops method for s390. */ |
| 1934 | |
| 1935 | static void |
| 1936 | s390_emit_zero_ext (int arg) |
| 1937 | { |
| 1938 | unsigned char buf[] = { |
| 1939 | 0x8d, 0x20, 0x00, (unsigned char) (64 - arg), /* sldl %r2, <64-arg> */ |
| 1940 | 0x8c, 0x20, 0x00, (unsigned char) (64 - arg), /* srdl %r2, <64-arg> */ |
| 1941 | }; |
| 1942 | add_insns (buf, sizeof buf); |
| 1943 | } |
| 1944 | |
| 1945 | /* The "emit_swap" emit_ops method for s390. */ |
| 1946 | |
| 1947 | static void |
| 1948 | s390_emit_swap (void) |
| 1949 | { |
| 1950 | static const unsigned char buf[] = { |
| 1951 | 0x98, 0x45, 0xf0, 0x00, /* lm %r4, %r5, 0(%r15) */ |
| 1952 | 0x90, 0x23, 0xf0, 0x00, /* stm %r2, %r3, 0(%r15) */ |
| 1953 | 0x18, 0x24, /* lr %r2, %r4 */ |
| 1954 | 0x18, 0x35, /* lr %r3, %r5 */ |
| 1955 | }; |
| 1956 | add_insns (buf, sizeof buf); |
| 1957 | } |
| 1958 | |
| 1959 | /* The "emit_stack_adjust" emit_ops method for s390. */ |
| 1960 | |
| 1961 | static void |
| 1962 | s390_emit_stack_adjust (int n) |
| 1963 | { |
| 1964 | unsigned char buf[] = { |
| 1965 | /* ahi %r15, 8*n */ |
| 1966 | 0xa7, 0xfa, |
| 1967 | (unsigned char ) (n * 8 >> 8), (unsigned char) (n * 8), |
| 1968 | }; |
| 1969 | add_insns (buf, sizeof buf); |
| 1970 | } |
| 1971 | |
| 1972 | /* Sets %r2 to a 32-bit constant. */ |
| 1973 | |
| 1974 | static void |
| 1975 | s390_emit_set_r2 (int arg1) |
| 1976 | { |
| 1977 | unsigned char buf_s[] = { |
| 1978 | /* lhi %r2, <arg1> */ |
| 1979 | 0xa7, 0x28, (unsigned char) (arg1 >> 8), (unsigned char) arg1, |
| 1980 | }; |
| 1981 | static const unsigned char buf_l[] = { |
| 1982 | 0x58, 0x20, 0x10, 0x00, /* l %r2, 0(%r1) */ |
| 1983 | }; |
| 1984 | if (arg1 < 0x8000 && arg1 >= -0x8000) |
| 1985 | { |
| 1986 | add_insns (buf_s, sizeof buf_s); |
| 1987 | } |
| 1988 | else |
| 1989 | { |
| 1990 | s390_emit_litpool (4); |
| 1991 | add_insns ((unsigned char *) &arg1, sizeof arg1); |
| 1992 | add_insns (buf_l, sizeof buf_l); |
| 1993 | } |
| 1994 | } |
| 1995 | |
| 1996 | /* The "emit_int_call_1" emit_ops method for s390. */ |
| 1997 | |
| 1998 | static void |
| 1999 | s390_emit_int_call_1 (CORE_ADDR fn, int arg1) |
| 2000 | { |
| 2001 | /* FN's prototype is `LONGEST(*fn)(int)'. */ |
| 2002 | s390_emit_set_r2 (arg1); |
| 2003 | s390_emit_call (fn); |
| 2004 | } |
| 2005 | |
| 2006 | /* The "emit_void_call_2" emit_ops method for s390. */ |
| 2007 | |
| 2008 | static void |
| 2009 | s390_emit_void_call_2 (CORE_ADDR fn, int arg1) |
| 2010 | { |
| 2011 | /* FN's prototype is `void(*fn)(int,LONGEST)'. */ |
| 2012 | static const unsigned char buf[] = { |
| 2013 | 0x18, 0xc2, /* lr %r12, %r2 */ |
| 2014 | 0x18, 0xd3, /* lr %r13, %r3 */ |
| 2015 | 0x18, 0x43, /* lr %r4, %r3 */ |
| 2016 | 0x18, 0x32, /* lr %r3, %r2 */ |
| 2017 | }; |
| 2018 | static const unsigned char buf2[] = { |
| 2019 | 0x18, 0x2c, /* lr %r2, %r12 */ |
| 2020 | 0x18, 0x3d, /* lr %r3, %r13 */ |
| 2021 | }; |
| 2022 | add_insns (buf, sizeof buf); |
| 2023 | s390_emit_set_r2 (arg1); |
| 2024 | s390_emit_call (fn); |
| 2025 | add_insns (buf2, sizeof buf2); |
| 2026 | } |
| 2027 | |
| 2028 | /* The "emit_eq_goto" emit_ops method for s390. */ |
| 2029 | |
| 2030 | static void |
| 2031 | s390_emit_eq_goto (int *offset_p, int *size_p) |
| 2032 | { |
| 2033 | static const unsigned char buf[] = { |
| 2034 | 0x57, 0x20, 0xf0, 0x00, /* x %r2, 0(%r15) */ |
| 2035 | 0x57, 0x30, 0xf0, 0x04, /* x %r3, 4(%r15) */ |
| 2036 | 0x16, 0x23, /* or %r2, %r3 */ |
| 2037 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2038 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2039 | 0xc0, 0x84, 0x00, 0x00, 0x00, 0x00, /* jge <fillme> */ |
| 2040 | }; |
| 2041 | add_insns (buf, sizeof buf); |
| 2042 | if (offset_p) |
| 2043 | *offset_p = 20; |
| 2044 | if (size_p) |
| 2045 | *size_p = 4; |
| 2046 | } |
| 2047 | |
| 2048 | /* The "emit_ne_goto" emit_ops method for s390. */ |
| 2049 | |
| 2050 | static void |
| 2051 | s390_emit_ne_goto (int *offset_p, int *size_p) |
| 2052 | { |
| 2053 | static const unsigned char buf[] = { |
| 2054 | 0x57, 0x20, 0xf0, 0x00, /* x %r2, 0(%r15) */ |
| 2055 | 0x57, 0x30, 0xf0, 0x04, /* x %r3, 4(%r15) */ |
| 2056 | 0x16, 0x23, /* or %r2, %r3 */ |
| 2057 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2058 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2059 | 0xc0, 0x74, 0x00, 0x00, 0x00, 0x00, /* jgne <fillme> */ |
| 2060 | }; |
| 2061 | add_insns (buf, sizeof buf); |
| 2062 | if (offset_p) |
| 2063 | *offset_p = 20; |
| 2064 | if (size_p) |
| 2065 | *size_p = 4; |
| 2066 | } |
| 2067 | |
| 2068 | /* The "emit_lt_goto" emit_ops method for s390. */ |
| 2069 | |
| 2070 | static void |
| 2071 | s390_emit_lt_goto (int *offset_p, int *size_p) |
| 2072 | { |
| 2073 | static const unsigned char buf[] = { |
| 2074 | 0x59, 0x20, 0xf0, 0x00, /* c %r2, 0(%r15) */ |
| 2075 | 0xa7, 0x24, 0x00, 0x0e, /* jh .Ltrue */ |
| 2076 | 0xa7, 0x44, 0x00, 0x06, /* jl .Lfalse */ |
| 2077 | 0x55, 0x30, 0xf0, 0x04, /* cl %r3, 4(%r15) */ |
| 2078 | 0xa7, 0x24, 0x00, 0x08, /* jh .Ltrue */ |
| 2079 | /* .Lfalse: */ |
| 2080 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2081 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2082 | 0xa7, 0xf4, 0x00, 0x09, /* j .Lend */ |
| 2083 | /* .Ltrue: */ |
| 2084 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2085 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2086 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg <fillme> */ |
| 2087 | /* .Lend: */ |
| 2088 | }; |
| 2089 | add_insns (buf, sizeof buf); |
| 2090 | if (offset_p) |
| 2091 | *offset_p = 42; |
| 2092 | if (size_p) |
| 2093 | *size_p = 4; |
| 2094 | } |
| 2095 | |
| 2096 | /* The "emit_le_goto" emit_ops method for s390. */ |
| 2097 | |
| 2098 | static void |
| 2099 | s390_emit_le_goto (int *offset_p, int *size_p) |
| 2100 | { |
| 2101 | static const unsigned char buf[] = { |
| 2102 | 0x59, 0x20, 0xf0, 0x00, /* c %r2, 0(%r15) */ |
| 2103 | 0xa7, 0x24, 0x00, 0x0e, /* jh .Ltrue */ |
| 2104 | 0xa7, 0x44, 0x00, 0x06, /* jl .Lfalse */ |
| 2105 | 0x55, 0x30, 0xf0, 0x04, /* cl %r3, 4(%r15) */ |
| 2106 | 0xa7, 0xa4, 0x00, 0x08, /* jhe .Ltrue */ |
| 2107 | /* .Lfalse: */ |
| 2108 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2109 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2110 | 0xa7, 0xf4, 0x00, 0x09, /* j .Lend */ |
| 2111 | /* .Ltrue: */ |
| 2112 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2113 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2114 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg <fillme> */ |
| 2115 | /* .Lend: */ |
| 2116 | }; |
| 2117 | add_insns (buf, sizeof buf); |
| 2118 | if (offset_p) |
| 2119 | *offset_p = 42; |
| 2120 | if (size_p) |
| 2121 | *size_p = 4; |
| 2122 | } |
| 2123 | |
| 2124 | /* The "emit_gt_goto" emit_ops method for s390. */ |
| 2125 | |
| 2126 | static void |
| 2127 | s390_emit_gt_goto (int *offset_p, int *size_p) |
| 2128 | { |
| 2129 | static const unsigned char buf[] = { |
| 2130 | 0x59, 0x20, 0xf0, 0x00, /* c %r2, 0(%r15) */ |
| 2131 | 0xa7, 0x44, 0x00, 0x0e, /* jl .Ltrue */ |
| 2132 | 0xa7, 0x24, 0x00, 0x06, /* jh .Lfalse */ |
| 2133 | 0x55, 0x30, 0xf0, 0x04, /* cl %r3, 4(%r15) */ |
| 2134 | 0xa7, 0x44, 0x00, 0x08, /* jl .Ltrue */ |
| 2135 | /* .Lfalse: */ |
| 2136 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2137 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2138 | 0xa7, 0xf4, 0x00, 0x09, /* j .Lend */ |
| 2139 | /* .Ltrue: */ |
| 2140 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2141 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2142 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg <fillme> */ |
| 2143 | /* .Lend: */ |
| 2144 | }; |
| 2145 | add_insns (buf, sizeof buf); |
| 2146 | if (offset_p) |
| 2147 | *offset_p = 42; |
| 2148 | if (size_p) |
| 2149 | *size_p = 4; |
| 2150 | } |
| 2151 | |
| 2152 | /* The "emit_ge_goto" emit_ops method for s390. */ |
| 2153 | |
| 2154 | static void |
| 2155 | s390_emit_ge_goto (int *offset_p, int *size_p) |
| 2156 | { |
| 2157 | static const unsigned char buf[] = { |
| 2158 | 0x59, 0x20, 0xf0, 0x00, /* c %r2, 0(%r15) */ |
| 2159 | 0xa7, 0x44, 0x00, 0x0e, /* jl .Ltrue */ |
| 2160 | 0xa7, 0x24, 0x00, 0x06, /* jh .Lfalse */ |
| 2161 | 0x55, 0x30, 0xf0, 0x04, /* cl %r3, 4(%r15) */ |
| 2162 | 0xa7, 0xc4, 0x00, 0x08, /* jle .Ltrue */ |
| 2163 | /* .Lfalse: */ |
| 2164 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2165 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2166 | 0xa7, 0xf4, 0x00, 0x09, /* j .Lend */ |
| 2167 | /* .Ltrue: */ |
| 2168 | 0x98, 0x23, 0xf0, 0x08, /* lm %r2, %r3, 8(%r15) */ |
| 2169 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2170 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg <fillme> */ |
| 2171 | /* .Lend: */ |
| 2172 | }; |
| 2173 | add_insns (buf, sizeof buf); |
| 2174 | if (offset_p) |
| 2175 | *offset_p = 42; |
| 2176 | if (size_p) |
| 2177 | *size_p = 4; |
| 2178 | } |
| 2179 | |
| 2180 | /* The "emit_ops" structure for s390. Named _impl to avoid name |
| 2181 | collision with s390_emit_ops function. */ |
| 2182 | |
| 2183 | static struct emit_ops s390_emit_ops_impl = |
| 2184 | { |
| 2185 | s390_emit_prologue, |
| 2186 | s390_emit_epilogue, |
| 2187 | s390_emit_add, |
| 2188 | s390_emit_sub, |
| 2189 | s390_emit_mul, |
| 2190 | s390_emit_lsh, |
| 2191 | s390_emit_rsh_signed, |
| 2192 | s390_emit_rsh_unsigned, |
| 2193 | s390_emit_ext, |
| 2194 | s390_emit_log_not, |
| 2195 | s390_emit_bit_and, |
| 2196 | s390_emit_bit_or, |
| 2197 | s390_emit_bit_xor, |
| 2198 | s390_emit_bit_not, |
| 2199 | s390_emit_equal, |
| 2200 | s390_emit_less_signed, |
| 2201 | s390_emit_less_unsigned, |
| 2202 | s390_emit_ref, |
| 2203 | s390_emit_if_goto, |
| 2204 | s390_emit_goto, |
| 2205 | s390_write_goto_address, |
| 2206 | s390_emit_const, |
| 2207 | s390_emit_call, |
| 2208 | s390_emit_reg, |
| 2209 | s390_emit_pop, |
| 2210 | s390_emit_stack_flush, |
| 2211 | s390_emit_zero_ext, |
| 2212 | s390_emit_swap, |
| 2213 | s390_emit_stack_adjust, |
| 2214 | s390_emit_int_call_1, |
| 2215 | s390_emit_void_call_2, |
| 2216 | s390_emit_eq_goto, |
| 2217 | s390_emit_ne_goto, |
| 2218 | s390_emit_lt_goto, |
| 2219 | s390_emit_le_goto, |
| 2220 | s390_emit_gt_goto, |
| 2221 | s390_emit_ge_goto |
| 2222 | }; |
| 2223 | |
| 2224 | #ifdef __s390x__ |
| 2225 | |
| 2226 | /* The "emit_prologue" emit_ops method for s390x. */ |
| 2227 | |
| 2228 | static void |
| 2229 | s390x_emit_prologue (void) |
| 2230 | { |
| 2231 | static const unsigned char buf[] = { |
| 2232 | 0xeb, 0x9f, 0xf0, 0x48, 0x00, 0x24, /* stmg %r9, %r15, 0x48(%r15) */ |
| 2233 | 0xb9, 0x04, 0x00, 0x92, /* lgr %r9, %r2 */ |
| 2234 | 0xb9, 0x04, 0x00, 0xa3, /* lgr %r10, %r3 */ |
| 2235 | 0xb9, 0x04, 0x00, 0xbf, /* lgr %r11, %r15 */ |
| 2236 | }; |
| 2237 | add_insns (buf, sizeof buf); |
| 2238 | } |
| 2239 | |
| 2240 | /* The "emit_epilogue" emit_ops method for s390x. */ |
| 2241 | |
| 2242 | static void |
| 2243 | s390x_emit_epilogue (void) |
| 2244 | { |
| 2245 | static const unsigned char buf[] = { |
| 2246 | 0xe3, 0x20, 0xa0, 0x00, 0x00, 0x24, /* stg %r2, 0(%r10) */ |
| 2247 | 0xa7, 0x29, 0x00, 0x00, /* lghi %r2, 0 */ |
| 2248 | 0xeb, 0x9f, 0xf0, 0x48, 0x00, 0x04, /* lmg %r9, %r15, 0x48(%r15) */ |
| 2249 | 0x07, 0xfe, /* br %r14 */ |
| 2250 | }; |
| 2251 | add_insns (buf, sizeof buf); |
| 2252 | } |
| 2253 | |
| 2254 | /* The "emit_add" emit_ops method for s390x. */ |
| 2255 | |
| 2256 | static void |
| 2257 | s390x_emit_add (void) |
| 2258 | { |
| 2259 | static const unsigned char buf[] = { |
| 2260 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x0a, /* alg %r2, 0(%r15) */ |
| 2261 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2262 | }; |
| 2263 | add_insns (buf, sizeof buf); |
| 2264 | } |
| 2265 | |
| 2266 | /* The "emit_sub" emit_ops method for s390x. */ |
| 2267 | |
| 2268 | static void |
| 2269 | s390x_emit_sub (void) |
| 2270 | { |
| 2271 | static const unsigned char buf[] = { |
| 2272 | 0xe3, 0x30, 0xf0, 0x00, 0x00, 0x04, /* lg %r3, 0(%r15) */ |
| 2273 | 0xb9, 0x0b, 0x00, 0x32, /* slgr %r3, %r2 */ |
| 2274 | 0xb9, 0x04, 0x00, 0x23, /* lgr %r2, %r3 */ |
| 2275 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2276 | }; |
| 2277 | add_insns (buf, sizeof buf); |
| 2278 | } |
| 2279 | |
| 2280 | /* The "emit_mul" emit_ops method for s390x. */ |
| 2281 | |
| 2282 | static void |
| 2283 | s390x_emit_mul (void) |
| 2284 | { |
| 2285 | emit_error = 1; |
| 2286 | } |
| 2287 | |
| 2288 | /* The "emit_lsh" emit_ops method for s390x. */ |
| 2289 | |
| 2290 | static void |
| 2291 | s390x_emit_lsh (void) |
| 2292 | { |
| 2293 | static const unsigned char buf[] = { |
| 2294 | 0xe3, 0x30, 0xf0, 0x00, 0x00, 0x04, /* lg %r3, 0(%r15) */ |
| 2295 | 0xeb, 0x23, 0x20, 0x00, 0x00, 0x0d, /* sllg %r2, %r3, 0(%r2) */ |
| 2296 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2297 | }; |
| 2298 | add_insns (buf, sizeof buf); |
| 2299 | } |
| 2300 | |
| 2301 | /* The "emit_rsh_signed" emit_ops method for s390x. */ |
| 2302 | |
| 2303 | static void |
| 2304 | s390x_emit_rsh_signed (void) |
| 2305 | { |
| 2306 | static const unsigned char buf[] = { |
| 2307 | 0xe3, 0x30, 0xf0, 0x00, 0x00, 0x04, /* lg %r3, 0(%r15) */ |
| 2308 | 0xeb, 0x23, 0x20, 0x00, 0x00, 0x0a, /* srag %r2, %r3, 0(%r2) */ |
| 2309 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2310 | }; |
| 2311 | add_insns (buf, sizeof buf); |
| 2312 | } |
| 2313 | |
| 2314 | /* The "emit_rsh_unsigned" emit_ops method for s390x. */ |
| 2315 | |
| 2316 | static void |
| 2317 | s390x_emit_rsh_unsigned (void) |
| 2318 | { |
| 2319 | static const unsigned char buf[] = { |
| 2320 | 0xe3, 0x30, 0xf0, 0x00, 0x00, 0x04, /* lg %r3, 0(%r15) */ |
| 2321 | 0xeb, 0x23, 0x20, 0x00, 0x00, 0x0c, /* srlg %r2, %r3, 0(%r2) */ |
| 2322 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2323 | }; |
| 2324 | add_insns (buf, sizeof buf); |
| 2325 | } |
| 2326 | |
| 2327 | /* The "emit_ext" emit_ops method for s390x. */ |
| 2328 | |
| 2329 | static void |
| 2330 | s390x_emit_ext (int arg) |
| 2331 | { |
| 2332 | unsigned char buf[] = { |
| 2333 | /* sllg %r2, %r2, <64-arg> */ |
| 2334 | 0xeb, 0x22, 0x00, (unsigned char) (64 - arg), 0x00, 0x0d, |
| 2335 | /* srag %r2, %r2, <64-arg> */ |
| 2336 | 0xeb, 0x22, 0x00, (unsigned char) (64 - arg), 0x00, 0x0a, |
| 2337 | }; |
| 2338 | add_insns (buf, sizeof buf); |
| 2339 | } |
| 2340 | |
| 2341 | /* The "emit_log_not" emit_ops method for s390x. */ |
| 2342 | |
| 2343 | static void |
| 2344 | s390x_emit_log_not (void) |
| 2345 | { |
| 2346 | static const unsigned char buf[] = { |
| 2347 | 0xb9, 0x00, 0x00, 0x22, /* lpgr %r2, %r2 */ |
| 2348 | 0xa7, 0x2b, 0xff, 0xff, /* aghi %r2, -1 */ |
| 2349 | 0xeb, 0x22, 0x00, 0x3f, 0x00, 0x0c, /* srlg %r2, %r2, 63 */ |
| 2350 | }; |
| 2351 | add_insns (buf, sizeof buf); |
| 2352 | } |
| 2353 | |
| 2354 | /* The "emit_bit_and" emit_ops method for s390x. */ |
| 2355 | |
| 2356 | static void |
| 2357 | s390x_emit_bit_and (void) |
| 2358 | { |
| 2359 | static const unsigned char buf[] = { |
| 2360 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x80, /* ng %r2, 0(%r15) */ |
| 2361 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2362 | }; |
| 2363 | add_insns (buf, sizeof buf); |
| 2364 | } |
| 2365 | |
| 2366 | /* The "emit_bit_or" emit_ops method for s390x. */ |
| 2367 | |
| 2368 | static void |
| 2369 | s390x_emit_bit_or (void) |
| 2370 | { |
| 2371 | static const unsigned char buf[] = { |
| 2372 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x81, /* og %r2, 0(%r15) */ |
| 2373 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2374 | }; |
| 2375 | add_insns (buf, sizeof buf); |
| 2376 | } |
| 2377 | |
| 2378 | /* The "emit_bit_xor" emit_ops method for s390x. */ |
| 2379 | |
| 2380 | static void |
| 2381 | s390x_emit_bit_xor (void) |
| 2382 | { |
| 2383 | static const unsigned char buf[] = { |
| 2384 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x82, /* xg %r2, 0(%r15) */ |
| 2385 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2386 | }; |
| 2387 | add_insns (buf, sizeof buf); |
| 2388 | } |
| 2389 | |
| 2390 | /* The "emit_bit_not" emit_ops method for s390x. */ |
| 2391 | |
| 2392 | static void |
| 2393 | s390x_emit_bit_not (void) |
| 2394 | { |
| 2395 | static const unsigned char buf[] = { |
| 2396 | 0xa7, 0x39, 0xff, 0xff, /* lghi %r3, -1 */ |
| 2397 | 0xb9, 0x82, 0x00, 0x23, /* xgr %r2, %r3 */ |
| 2398 | }; |
| 2399 | add_insns (buf, sizeof buf); |
| 2400 | } |
| 2401 | |
| 2402 | /* The "emit_equal" emit_ops method for s390x. */ |
| 2403 | |
| 2404 | static void |
| 2405 | s390x_emit_equal (void) |
| 2406 | { |
| 2407 | s390x_emit_bit_xor (); |
| 2408 | s390x_emit_log_not (); |
| 2409 | } |
| 2410 | |
| 2411 | /* The "emit_less_signed" emit_ops method for s390x. */ |
| 2412 | |
| 2413 | static void |
| 2414 | s390x_emit_less_signed (void) |
| 2415 | { |
| 2416 | static const unsigned char buf[] = { |
| 2417 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2418 | 0xa7, 0x29, 0x00, 0x01, /* lghi %r2, 1 */ |
| 2419 | 0xa7, 0x24, 0x00, 0x04, /* jh .Lend */ |
| 2420 | 0xa7, 0x29, 0x00, 0x00, /* lghi %r2, 0 */ |
| 2421 | /* .Lend: */ |
| 2422 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2423 | }; |
| 2424 | add_insns (buf, sizeof buf); |
| 2425 | } |
| 2426 | |
| 2427 | /* The "emit_less_unsigned" emit_ops method for s390x. */ |
| 2428 | |
| 2429 | static void |
| 2430 | s390x_emit_less_unsigned (void) |
| 2431 | { |
| 2432 | static const unsigned char buf[] = { |
| 2433 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x21, /* clg %r2, 0(%r15) */ |
| 2434 | 0xa7, 0x29, 0x00, 0x01, /* lghi %r2, 1 */ |
| 2435 | 0xa7, 0x24, 0x00, 0x04, /* jh .Lend */ |
| 2436 | 0xa7, 0x29, 0x00, 0x00, /* lghi %r2, 0 */ |
| 2437 | /* .Lend: */ |
| 2438 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2439 | }; |
| 2440 | add_insns (buf, sizeof buf); |
| 2441 | } |
| 2442 | |
| 2443 | /* The "emit_ref" emit_ops method for s390x. */ |
| 2444 | |
| 2445 | static void |
| 2446 | s390x_emit_ref (int size) |
| 2447 | { |
| 2448 | static const unsigned char buf1[] = { |
| 2449 | 0xe3, 0x20, 0x20, 0x00, 0x00, 0x90, /* llgc %r2, 0(%r2) */ |
| 2450 | }; |
| 2451 | static const unsigned char buf2[] = { |
| 2452 | 0xe3, 0x20, 0x20, 0x00, 0x00, 0x91 /* llgh %r2, 0(%r2) */ |
| 2453 | }; |
| 2454 | static const unsigned char buf4[] = { |
| 2455 | 0xe3, 0x20, 0x20, 0x00, 0x00, 0x16, /* llgf %r2, 0(%r2) */ |
| 2456 | }; |
| 2457 | static const unsigned char buf8[] = { |
| 2458 | 0xe3, 0x20, 0x20, 0x00, 0x00, 0x04, /* lg %r2, 0(%r2) */ |
| 2459 | }; |
| 2460 | switch (size) |
| 2461 | { |
| 2462 | case 1: |
| 2463 | add_insns (buf1, sizeof buf1); |
| 2464 | break; |
| 2465 | case 2: |
| 2466 | add_insns (buf2, sizeof buf2); |
| 2467 | break; |
| 2468 | case 4: |
| 2469 | add_insns (buf4, sizeof buf4); |
| 2470 | break; |
| 2471 | case 8: |
| 2472 | add_insns (buf8, sizeof buf8); |
| 2473 | break; |
| 2474 | default: |
| 2475 | emit_error = 1; |
| 2476 | } |
| 2477 | } |
| 2478 | |
| 2479 | /* The "emit_if_goto" emit_ops method for s390x. */ |
| 2480 | |
| 2481 | static void |
| 2482 | s390x_emit_if_goto (int *offset_p, int *size_p) |
| 2483 | { |
| 2484 | static const unsigned char buf[] = { |
| 2485 | 0xb9, 0x02, 0x00, 0x22, /* ltgr %r2, %r2 */ |
| 2486 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x04, /* lg %r2, 0(%r15) */ |
| 2487 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2488 | 0xc0, 0x74, 0x00, 0x00, 0x00, 0x00, /* jgne <fillme> */ |
| 2489 | }; |
| 2490 | add_insns (buf, sizeof buf); |
| 2491 | if (offset_p) |
| 2492 | *offset_p = 16; |
| 2493 | if (size_p) |
| 2494 | *size_p = 4; |
| 2495 | } |
| 2496 | |
| 2497 | /* The "emit_const" emit_ops method for s390x. */ |
| 2498 | |
| 2499 | static void |
| 2500 | s390x_emit_const (LONGEST num) |
| 2501 | { |
| 2502 | unsigned long long n = num; |
| 2503 | unsigned char buf_s[] = { |
| 2504 | /* lghi %r2, <num> */ |
| 2505 | 0xa7, 0x29, (unsigned char) (num >> 8), (unsigned char) num, |
| 2506 | }; |
| 2507 | static const unsigned char buf_l[] = { |
| 2508 | 0xe3, 0x20, 0x10, 0x00, 0x00, 0x04, /* lg %r2, 0(%r1) */ |
| 2509 | }; |
| 2510 | if (num < 0x8000 && num >= -0x8000) |
| 2511 | { |
| 2512 | add_insns (buf_s, sizeof buf_s); |
| 2513 | } |
| 2514 | else |
| 2515 | { |
| 2516 | s390_emit_litpool (8); |
| 2517 | add_insns ((unsigned char *) &n, sizeof n); |
| 2518 | add_insns (buf_l, sizeof buf_l); |
| 2519 | } |
| 2520 | } |
| 2521 | |
| 2522 | /* The "emit_call" emit_ops method for s390x. */ |
| 2523 | |
| 2524 | static void |
| 2525 | s390x_emit_call (CORE_ADDR fn) |
| 2526 | { |
| 2527 | unsigned long n = fn; |
| 2528 | static const unsigned char buf[] = { |
| 2529 | 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1, 0(%r1) */ |
| 2530 | 0xa7, 0xfb, 0xff, 0x60, /* aghi %r15, -0xa0 */ |
| 2531 | 0x0d, 0xe1, /* basr %r14, %r1 */ |
| 2532 | 0xa7, 0xfb, 0x00, 0xa0, /* aghi %r15, 0xa0 */ |
| 2533 | }; |
| 2534 | s390_emit_litpool (8); |
| 2535 | add_insns ((unsigned char *) &n, sizeof n); |
| 2536 | add_insns (buf, sizeof buf); |
| 2537 | } |
| 2538 | |
| 2539 | /* The "emit_reg" emit_ops method for s390x. */ |
| 2540 | |
| 2541 | static void |
| 2542 | s390x_emit_reg (int reg) |
| 2543 | { |
| 2544 | unsigned char buf[] = { |
| 2545 | /* lgr %r2, %r9 */ |
| 2546 | 0xb9, 0x04, 0x00, 0x29, |
| 2547 | /* lghi %r3, <reg> */ |
| 2548 | 0xa7, 0x39, (unsigned char) (reg >> 8), (unsigned char) reg, |
| 2549 | }; |
| 2550 | add_insns (buf, sizeof buf); |
| 2551 | s390x_emit_call (get_raw_reg_func_addr ()); |
| 2552 | } |
| 2553 | |
| 2554 | /* The "emit_pop" emit_ops method for s390x. */ |
| 2555 | |
| 2556 | static void |
| 2557 | s390x_emit_pop (void) |
| 2558 | { |
| 2559 | static const unsigned char buf[] = { |
| 2560 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x04, /* lg %r2, 0(%r15) */ |
| 2561 | 0x41, 0xf0, 0xf0, 0x08, /* la %r15, 8(%r15) */ |
| 2562 | }; |
| 2563 | add_insns (buf, sizeof buf); |
| 2564 | } |
| 2565 | |
| 2566 | /* The "emit_stack_flush" emit_ops method for s390x. */ |
| 2567 | |
| 2568 | static void |
| 2569 | s390x_emit_stack_flush (void) |
| 2570 | { |
| 2571 | static const unsigned char buf[] = { |
| 2572 | 0xa7, 0xfb, 0xff, 0xf8, /* aghi %r15, -8 */ |
| 2573 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x24, /* stg %r2, 0(%r15) */ |
| 2574 | }; |
| 2575 | add_insns (buf, sizeof buf); |
| 2576 | } |
| 2577 | |
| 2578 | /* The "emit_zero_ext" emit_ops method for s390x. */ |
| 2579 | |
| 2580 | static void |
| 2581 | s390x_emit_zero_ext (int arg) |
| 2582 | { |
| 2583 | unsigned char buf[] = { |
| 2584 | /* sllg %r2, %r2, <64-arg> */ |
| 2585 | 0xeb, 0x22, 0x00, (unsigned char) (64 - arg), 0x00, 0x0d, |
| 2586 | /* srlg %r2, %r2, <64-arg> */ |
| 2587 | 0xeb, 0x22, 0x00, (unsigned char) (64 - arg), 0x00, 0x0c, |
| 2588 | }; |
| 2589 | add_insns (buf, sizeof buf); |
| 2590 | } |
| 2591 | |
| 2592 | /* The "emit_swap" emit_ops method for s390x. */ |
| 2593 | |
| 2594 | static void |
| 2595 | s390x_emit_swap (void) |
| 2596 | { |
| 2597 | static const unsigned char buf[] = { |
| 2598 | 0xe3, 0x30, 0xf0, 0x00, 0x00, 0x04, /* lg %r3, 0(%r15) */ |
| 2599 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x24, /* stg %r2, 0(%r15) */ |
| 2600 | 0xb9, 0x04, 0x00, 0x23, /* lgr %r2, %r3 */ |
| 2601 | }; |
| 2602 | add_insns (buf, sizeof buf); |
| 2603 | } |
| 2604 | |
| 2605 | /* The "emit_stack_adjust" emit_ops method for s390x. */ |
| 2606 | |
| 2607 | static void |
| 2608 | s390x_emit_stack_adjust (int n) |
| 2609 | { |
| 2610 | unsigned char buf[] = { |
| 2611 | /* aghi %r15, 8*n */ |
| 2612 | 0xa7, 0xfb, |
| 2613 | (unsigned char) (n * 8 >> 8), (unsigned char) (n * 8), |
| 2614 | }; |
| 2615 | add_insns (buf, sizeof buf); |
| 2616 | } |
| 2617 | |
| 2618 | /* The "emit_int_call_1" emit_ops method for s390x. */ |
| 2619 | |
| 2620 | static void |
| 2621 | s390x_emit_int_call_1 (CORE_ADDR fn, int arg1) |
| 2622 | { |
| 2623 | /* FN's prototype is `LONGEST(*fn)(int)'. */ |
| 2624 | s390x_emit_const (arg1); |
| 2625 | s390x_emit_call (fn); |
| 2626 | } |
| 2627 | |
| 2628 | /* The "emit_void_call_2" emit_ops method for s390x. */ |
| 2629 | |
| 2630 | static void |
| 2631 | s390x_emit_void_call_2 (CORE_ADDR fn, int arg1) |
| 2632 | { |
| 2633 | /* FN's prototype is `void(*fn)(int,LONGEST)'. */ |
| 2634 | static const unsigned char buf[] = { |
| 2635 | 0xb9, 0x04, 0x00, 0x32, /* lgr %r3, %r2 */ |
| 2636 | 0xb9, 0x04, 0x00, 0xc2, /* lgr %r12, %r2 */ |
| 2637 | }; |
| 2638 | static const unsigned char buf2[] = { |
| 2639 | 0xb9, 0x04, 0x00, 0x2c, /* lgr %r2, %r12 */ |
| 2640 | }; |
| 2641 | add_insns (buf, sizeof buf); |
| 2642 | s390x_emit_const (arg1); |
| 2643 | s390x_emit_call (fn); |
| 2644 | add_insns (buf2, sizeof buf2); |
| 2645 | } |
| 2646 | |
| 2647 | /* The "emit_eq_goto" emit_ops method for s390x. */ |
| 2648 | |
| 2649 | static void |
| 2650 | s390x_emit_eq_goto (int *offset_p, int *size_p) |
| 2651 | { |
| 2652 | static const unsigned char buf[] = { |
| 2653 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2654 | 0xe3, 0x20, 0xf0, 0x08, 0x00, 0x04, /* lg %r2, 8(%r15) */ |
| 2655 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2656 | 0xc0, 0x84, 0x00, 0x00, 0x00, 0x00, /* jge <fillme> */ |
| 2657 | }; |
| 2658 | add_insns (buf, sizeof buf); |
| 2659 | if (offset_p) |
| 2660 | *offset_p = 18; |
| 2661 | if (size_p) |
| 2662 | *size_p = 4; |
| 2663 | } |
| 2664 | |
| 2665 | /* The "emit_ne_goto" emit_ops method for s390x. */ |
| 2666 | |
| 2667 | static void |
| 2668 | s390x_emit_ne_goto (int *offset_p, int *size_p) |
| 2669 | { |
| 2670 | static const unsigned char buf[] = { |
| 2671 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2672 | 0xe3, 0x20, 0xf0, 0x08, 0x00, 0x04, /* lg %r2, 8(%r15) */ |
| 2673 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2674 | 0xc0, 0x74, 0x00, 0x00, 0x00, 0x00, /* jgne <fillme> */ |
| 2675 | }; |
| 2676 | add_insns (buf, sizeof buf); |
| 2677 | if (offset_p) |
| 2678 | *offset_p = 18; |
| 2679 | if (size_p) |
| 2680 | *size_p = 4; |
| 2681 | } |
| 2682 | |
| 2683 | /* The "emit_lt_goto" emit_ops method for s390x. */ |
| 2684 | |
| 2685 | static void |
| 2686 | s390x_emit_lt_goto (int *offset_p, int *size_p) |
| 2687 | { |
| 2688 | static const unsigned char buf[] = { |
| 2689 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2690 | 0xe3, 0x20, 0xf0, 0x08, 0x00, 0x04, /* lg %r2, 8(%r15) */ |
| 2691 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2692 | 0xc0, 0x24, 0x00, 0x00, 0x00, 0x00, /* jgh <fillme> */ |
| 2693 | }; |
| 2694 | add_insns (buf, sizeof buf); |
| 2695 | if (offset_p) |
| 2696 | *offset_p = 18; |
| 2697 | if (size_p) |
| 2698 | *size_p = 4; |
| 2699 | } |
| 2700 | |
| 2701 | /* The "emit_le_goto" emit_ops method for s390x. */ |
| 2702 | |
| 2703 | static void |
| 2704 | s390x_emit_le_goto (int *offset_p, int *size_p) |
| 2705 | { |
| 2706 | static const unsigned char buf[] = { |
| 2707 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2708 | 0xe3, 0x20, 0xf0, 0x08, 0x00, 0x04, /* lg %r2, 8(%r15) */ |
| 2709 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2710 | 0xc0, 0xa4, 0x00, 0x00, 0x00, 0x00, /* jghe <fillme> */ |
| 2711 | }; |
| 2712 | add_insns (buf, sizeof buf); |
| 2713 | if (offset_p) |
| 2714 | *offset_p = 18; |
| 2715 | if (size_p) |
| 2716 | *size_p = 4; |
| 2717 | } |
| 2718 | |
| 2719 | /* The "emit_gt_goto" emit_ops method for s390x. */ |
| 2720 | |
| 2721 | static void |
| 2722 | s390x_emit_gt_goto (int *offset_p, int *size_p) |
| 2723 | { |
| 2724 | static const unsigned char buf[] = { |
| 2725 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2726 | 0xe3, 0x20, 0xf0, 0x08, 0x00, 0x04, /* lg %r2, 8(%r15) */ |
| 2727 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2728 | 0xc0, 0x44, 0x00, 0x00, 0x00, 0x00, /* jgl <fillme> */ |
| 2729 | }; |
| 2730 | add_insns (buf, sizeof buf); |
| 2731 | if (offset_p) |
| 2732 | *offset_p = 18; |
| 2733 | if (size_p) |
| 2734 | *size_p = 4; |
| 2735 | } |
| 2736 | |
| 2737 | /* The "emit_ge_goto" emit_ops method for s390x. */ |
| 2738 | |
| 2739 | static void |
| 2740 | s390x_emit_ge_goto (int *offset_p, int *size_p) |
| 2741 | { |
| 2742 | static const unsigned char buf[] = { |
| 2743 | 0xe3, 0x20, 0xf0, 0x00, 0x00, 0x20, /* cg %r2, 0(%r15) */ |
| 2744 | 0xe3, 0x20, 0xf0, 0x08, 0x00, 0x04, /* lg %r2, 8(%r15) */ |
| 2745 | 0x41, 0xf0, 0xf0, 0x10, /* la %r15, 16(%r15) */ |
| 2746 | 0xc0, 0xc4, 0x00, 0x00, 0x00, 0x00, /* jgle <fillme> */ |
| 2747 | }; |
| 2748 | add_insns (buf, sizeof buf); |
| 2749 | if (offset_p) |
| 2750 | *offset_p = 18; |
| 2751 | if (size_p) |
| 2752 | *size_p = 4; |
| 2753 | } |
| 2754 | |
| 2755 | /* The "emit_ops" structure for s390x. */ |
| 2756 | |
| 2757 | static struct emit_ops s390x_emit_ops = |
| 2758 | { |
| 2759 | s390x_emit_prologue, |
| 2760 | s390x_emit_epilogue, |
| 2761 | s390x_emit_add, |
| 2762 | s390x_emit_sub, |
| 2763 | s390x_emit_mul, |
| 2764 | s390x_emit_lsh, |
| 2765 | s390x_emit_rsh_signed, |
| 2766 | s390x_emit_rsh_unsigned, |
| 2767 | s390x_emit_ext, |
| 2768 | s390x_emit_log_not, |
| 2769 | s390x_emit_bit_and, |
| 2770 | s390x_emit_bit_or, |
| 2771 | s390x_emit_bit_xor, |
| 2772 | s390x_emit_bit_not, |
| 2773 | s390x_emit_equal, |
| 2774 | s390x_emit_less_signed, |
| 2775 | s390x_emit_less_unsigned, |
| 2776 | s390x_emit_ref, |
| 2777 | s390x_emit_if_goto, |
| 2778 | s390_emit_goto, |
| 2779 | s390_write_goto_address, |
| 2780 | s390x_emit_const, |
| 2781 | s390x_emit_call, |
| 2782 | s390x_emit_reg, |
| 2783 | s390x_emit_pop, |
| 2784 | s390x_emit_stack_flush, |
| 2785 | s390x_emit_zero_ext, |
| 2786 | s390x_emit_swap, |
| 2787 | s390x_emit_stack_adjust, |
| 2788 | s390x_emit_int_call_1, |
| 2789 | s390x_emit_void_call_2, |
| 2790 | s390x_emit_eq_goto, |
| 2791 | s390x_emit_ne_goto, |
| 2792 | s390x_emit_lt_goto, |
| 2793 | s390x_emit_le_goto, |
| 2794 | s390x_emit_gt_goto, |
| 2795 | s390x_emit_ge_goto |
| 2796 | }; |
| 2797 | #endif |
| 2798 | |
| 2799 | /* The "emit_ops" linux_target_ops method. */ |
| 2800 | |
| 2801 | static struct emit_ops * |
| 2802 | s390_emit_ops (void) |
| 2803 | { |
| 2804 | #ifdef __s390x__ |
| 2805 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 2806 | |
| 2807 | if (register_size (regcache->tdesc, 0) == 8) |
| 2808 | return &s390x_emit_ops; |
| 2809 | else |
| 2810 | #endif |
| 2811 | return &s390_emit_ops_impl; |
| 2812 | } |
| 2813 | |
| 2814 | struct linux_target_ops the_low_target = { |
| 2815 | s390_get_pc, |
| 2816 | s390_set_pc, |
| 2817 | NULL, /* breakpoint_kind_from_pc */ |
| 2818 | s390_sw_breakpoint_from_kind, |
| 2819 | NULL, |
| 2820 | s390_breakpoint_len, |
| 2821 | s390_breakpoint_at, |
| 2822 | s390_supports_z_point_type, |
| 2823 | NULL, |
| 2824 | NULL, |
| 2825 | NULL, |
| 2826 | NULL, |
| 2827 | s390_collect_ptrace_register, |
| 2828 | s390_supply_ptrace_register, |
| 2829 | NULL, /* siginfo_fixup */ |
| 2830 | NULL, /* new_process */ |
| 2831 | NULL, /* delete_process */ |
| 2832 | NULL, /* new_thread */ |
| 2833 | NULL, /* delete_thread */ |
| 2834 | NULL, /* new_fork */ |
| 2835 | NULL, /* prepare_to_resume */ |
| 2836 | NULL, /* process_qsupported */ |
| 2837 | s390_supports_tracepoints, |
| 2838 | s390_get_thread_area, |
| 2839 | s390_install_fast_tracepoint_jump_pad, |
| 2840 | s390_emit_ops, |
| 2841 | s390_get_min_fast_tracepoint_insn_len, |
| 2842 | NULL, /* supports_range_stepping */ |
| 2843 | NULL, /* breakpoint_kind_from_current_state */ |
| 2844 | s390_supports_hardware_single_step, |
| 2845 | NULL, /* get_syscall_trapinfo */ |
| 2846 | s390_get_ipa_tdesc_idx, |
| 2847 | }; |
| 2848 | |
| 2849 | /* The linux target ops object. */ |
| 2850 | |
| 2851 | linux_process_target *the_linux_target = &the_s390_target; |
| 2852 | |
| 2853 | void |
| 2854 | initialize_low_arch (void) |
| 2855 | { |
| 2856 | /* Initialize the Linux target descriptions. */ |
| 2857 | |
| 2858 | init_registers_s390_linux32 (); |
| 2859 | init_registers_s390_linux32v1 (); |
| 2860 | init_registers_s390_linux32v2 (); |
| 2861 | init_registers_s390_linux64 (); |
| 2862 | init_registers_s390_linux64v1 (); |
| 2863 | init_registers_s390_linux64v2 (); |
| 2864 | init_registers_s390_te_linux64 (); |
| 2865 | init_registers_s390_vx_linux64 (); |
| 2866 | init_registers_s390_tevx_linux64 (); |
| 2867 | init_registers_s390_gs_linux64 (); |
| 2868 | #ifdef __s390x__ |
| 2869 | init_registers_s390x_linux64 (); |
| 2870 | init_registers_s390x_linux64v1 (); |
| 2871 | init_registers_s390x_linux64v2 (); |
| 2872 | init_registers_s390x_te_linux64 (); |
| 2873 | init_registers_s390x_vx_linux64 (); |
| 2874 | init_registers_s390x_tevx_linux64 (); |
| 2875 | init_registers_s390x_gs_linux64 (); |
| 2876 | #endif |
| 2877 | |
| 2878 | initialize_regsets_info (&s390_regsets_info); |
| 2879 | initialize_regsets_info (&s390_regsets_info_3264); |
| 2880 | } |