| 1 | /* GNU/Linux/PowerPC specific low level interface, for the remote server for |
| 2 | GDB. |
| 3 | Copyright (C) 1995-2020 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 | #include "server.h" |
| 21 | #include "linux-low.h" |
| 22 | |
| 23 | #include "elf/common.h" |
| 24 | #include <sys/uio.h> |
| 25 | #include <elf.h> |
| 26 | #include <asm/ptrace.h> |
| 27 | |
| 28 | #include "arch/ppc-linux-common.h" |
| 29 | #include "arch/ppc-linux-tdesc.h" |
| 30 | #include "nat/ppc-linux.h" |
| 31 | #include "nat/linux-ptrace.h" |
| 32 | #include "linux-ppc-tdesc-init.h" |
| 33 | #include "ax.h" |
| 34 | #include "tracepoint.h" |
| 35 | |
| 36 | #define PPC_FIELD(value, from, len) \ |
| 37 | (((value) >> (32 - (from) - (len))) & ((1 << (len)) - 1)) |
| 38 | #define PPC_SEXT(v, bs) \ |
| 39 | ((((CORE_ADDR) (v) & (((CORE_ADDR) 1 << (bs)) - 1)) \ |
| 40 | ^ ((CORE_ADDR) 1 << ((bs) - 1))) \ |
| 41 | - ((CORE_ADDR) 1 << ((bs) - 1))) |
| 42 | #define PPC_OP6(insn) PPC_FIELD (insn, 0, 6) |
| 43 | #define PPC_BO(insn) PPC_FIELD (insn, 6, 5) |
| 44 | #define PPC_LI(insn) (PPC_SEXT (PPC_FIELD (insn, 6, 24), 24) << 2) |
| 45 | #define PPC_BD(insn) (PPC_SEXT (PPC_FIELD (insn, 16, 14), 14) << 2) |
| 46 | |
| 47 | /* Linux target op definitions for the PowerPC architecture. */ |
| 48 | |
| 49 | class ppc_target : public linux_process_target |
| 50 | { |
| 51 | public: |
| 52 | |
| 53 | const regs_info *get_regs_info () override; |
| 54 | |
| 55 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
| 56 | |
| 57 | bool supports_z_point_type (char z_type) override; |
| 58 | |
| 59 | protected: |
| 60 | |
| 61 | void low_arch_setup () override; |
| 62 | |
| 63 | bool low_cannot_fetch_register (int regno) override; |
| 64 | |
| 65 | bool low_cannot_store_register (int regno) override; |
| 66 | |
| 67 | bool low_supports_breakpoints () override; |
| 68 | |
| 69 | CORE_ADDR low_get_pc (regcache *regcache) override; |
| 70 | |
| 71 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; |
| 72 | |
| 73 | bool low_breakpoint_at (CORE_ADDR pc) override; |
| 74 | }; |
| 75 | |
| 76 | /* The singleton target ops object. */ |
| 77 | |
| 78 | static ppc_target the_ppc_target; |
| 79 | |
| 80 | /* Holds the AT_HWCAP auxv entry. */ |
| 81 | |
| 82 | static unsigned long ppc_hwcap; |
| 83 | |
| 84 | /* Holds the AT_HWCAP2 auxv entry. */ |
| 85 | |
| 86 | static unsigned long ppc_hwcap2; |
| 87 | |
| 88 | |
| 89 | #define ppc_num_regs 73 |
| 90 | |
| 91 | #ifdef __powerpc64__ |
| 92 | /* We use a constant for FPSCR instead of PT_FPSCR, because |
| 93 | many shipped PPC64 kernels had the wrong value in ptrace.h. */ |
| 94 | static int ppc_regmap[] = |
| 95 | {PT_R0 * 8, PT_R1 * 8, PT_R2 * 8, PT_R3 * 8, |
| 96 | PT_R4 * 8, PT_R5 * 8, PT_R6 * 8, PT_R7 * 8, |
| 97 | PT_R8 * 8, PT_R9 * 8, PT_R10 * 8, PT_R11 * 8, |
| 98 | PT_R12 * 8, PT_R13 * 8, PT_R14 * 8, PT_R15 * 8, |
| 99 | PT_R16 * 8, PT_R17 * 8, PT_R18 * 8, PT_R19 * 8, |
| 100 | PT_R20 * 8, PT_R21 * 8, PT_R22 * 8, PT_R23 * 8, |
| 101 | PT_R24 * 8, PT_R25 * 8, PT_R26 * 8, PT_R27 * 8, |
| 102 | PT_R28 * 8, PT_R29 * 8, PT_R30 * 8, PT_R31 * 8, |
| 103 | PT_FPR0*8, PT_FPR0*8 + 8, PT_FPR0*8+16, PT_FPR0*8+24, |
| 104 | PT_FPR0*8+32, PT_FPR0*8+40, PT_FPR0*8+48, PT_FPR0*8+56, |
| 105 | PT_FPR0*8+64, PT_FPR0*8+72, PT_FPR0*8+80, PT_FPR0*8+88, |
| 106 | PT_FPR0*8+96, PT_FPR0*8+104, PT_FPR0*8+112, PT_FPR0*8+120, |
| 107 | PT_FPR0*8+128, PT_FPR0*8+136, PT_FPR0*8+144, PT_FPR0*8+152, |
| 108 | PT_FPR0*8+160, PT_FPR0*8+168, PT_FPR0*8+176, PT_FPR0*8+184, |
| 109 | PT_FPR0*8+192, PT_FPR0*8+200, PT_FPR0*8+208, PT_FPR0*8+216, |
| 110 | PT_FPR0*8+224, PT_FPR0*8+232, PT_FPR0*8+240, PT_FPR0*8+248, |
| 111 | PT_NIP * 8, PT_MSR * 8, PT_CCR * 8, PT_LNK * 8, |
| 112 | PT_CTR * 8, PT_XER * 8, PT_FPR0*8 + 256, |
| 113 | PT_ORIG_R3 * 8, PT_TRAP * 8 }; |
| 114 | #else |
| 115 | /* Currently, don't check/send MQ. */ |
| 116 | static int ppc_regmap[] = |
| 117 | {PT_R0 * 4, PT_R1 * 4, PT_R2 * 4, PT_R3 * 4, |
| 118 | PT_R4 * 4, PT_R5 * 4, PT_R6 * 4, PT_R7 * 4, |
| 119 | PT_R8 * 4, PT_R9 * 4, PT_R10 * 4, PT_R11 * 4, |
| 120 | PT_R12 * 4, PT_R13 * 4, PT_R14 * 4, PT_R15 * 4, |
| 121 | PT_R16 * 4, PT_R17 * 4, PT_R18 * 4, PT_R19 * 4, |
| 122 | PT_R20 * 4, PT_R21 * 4, PT_R22 * 4, PT_R23 * 4, |
| 123 | PT_R24 * 4, PT_R25 * 4, PT_R26 * 4, PT_R27 * 4, |
| 124 | PT_R28 * 4, PT_R29 * 4, PT_R30 * 4, PT_R31 * 4, |
| 125 | PT_FPR0*4, PT_FPR0*4 + 8, PT_FPR0*4+16, PT_FPR0*4+24, |
| 126 | PT_FPR0*4+32, PT_FPR0*4+40, PT_FPR0*4+48, PT_FPR0*4+56, |
| 127 | PT_FPR0*4+64, PT_FPR0*4+72, PT_FPR0*4+80, PT_FPR0*4+88, |
| 128 | PT_FPR0*4+96, PT_FPR0*4+104, PT_FPR0*4+112, PT_FPR0*4+120, |
| 129 | PT_FPR0*4+128, PT_FPR0*4+136, PT_FPR0*4+144, PT_FPR0*4+152, |
| 130 | PT_FPR0*4+160, PT_FPR0*4+168, PT_FPR0*4+176, PT_FPR0*4+184, |
| 131 | PT_FPR0*4+192, PT_FPR0*4+200, PT_FPR0*4+208, PT_FPR0*4+216, |
| 132 | PT_FPR0*4+224, PT_FPR0*4+232, PT_FPR0*4+240, PT_FPR0*4+248, |
| 133 | PT_NIP * 4, PT_MSR * 4, PT_CCR * 4, PT_LNK * 4, |
| 134 | PT_CTR * 4, PT_XER * 4, PT_FPSCR * 4, |
| 135 | PT_ORIG_R3 * 4, PT_TRAP * 4 |
| 136 | }; |
| 137 | |
| 138 | static int ppc_regmap_e500[] = |
| 139 | {PT_R0 * 4, PT_R1 * 4, PT_R2 * 4, PT_R3 * 4, |
| 140 | PT_R4 * 4, PT_R5 * 4, PT_R6 * 4, PT_R7 * 4, |
| 141 | PT_R8 * 4, PT_R9 * 4, PT_R10 * 4, PT_R11 * 4, |
| 142 | PT_R12 * 4, PT_R13 * 4, PT_R14 * 4, PT_R15 * 4, |
| 143 | PT_R16 * 4, PT_R17 * 4, PT_R18 * 4, PT_R19 * 4, |
| 144 | PT_R20 * 4, PT_R21 * 4, PT_R22 * 4, PT_R23 * 4, |
| 145 | PT_R24 * 4, PT_R25 * 4, PT_R26 * 4, PT_R27 * 4, |
| 146 | PT_R28 * 4, PT_R29 * 4, PT_R30 * 4, PT_R31 * 4, |
| 147 | -1, -1, -1, -1, |
| 148 | -1, -1, -1, -1, |
| 149 | -1, -1, -1, -1, |
| 150 | -1, -1, -1, -1, |
| 151 | -1, -1, -1, -1, |
| 152 | -1, -1, -1, -1, |
| 153 | -1, -1, -1, -1, |
| 154 | -1, -1, -1, -1, |
| 155 | PT_NIP * 4, PT_MSR * 4, PT_CCR * 4, PT_LNK * 4, |
| 156 | PT_CTR * 4, PT_XER * 4, -1, |
| 157 | PT_ORIG_R3 * 4, PT_TRAP * 4 |
| 158 | }; |
| 159 | #endif |
| 160 | |
| 161 | /* Check whether the kernel provides a register set with number |
| 162 | REGSET_ID of size REGSETSIZE for process/thread TID. */ |
| 163 | |
| 164 | static int |
| 165 | ppc_check_regset (int tid, int regset_id, int regsetsize) |
| 166 | { |
| 167 | void *buf = alloca (regsetsize); |
| 168 | struct iovec iov; |
| 169 | |
| 170 | iov.iov_base = buf; |
| 171 | iov.iov_len = regsetsize; |
| 172 | |
| 173 | if (ptrace (PTRACE_GETREGSET, tid, regset_id, &iov) >= 0 |
| 174 | || errno == ENODATA) |
| 175 | return 1; |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | bool |
| 180 | ppc_target::low_cannot_store_register (int regno) |
| 181 | { |
| 182 | const struct target_desc *tdesc = current_process ()->tdesc; |
| 183 | |
| 184 | #ifndef __powerpc64__ |
| 185 | /* Some kernels do not allow us to store fpscr. */ |
| 186 | if (!(ppc_hwcap & PPC_FEATURE_HAS_SPE) |
| 187 | && regno == find_regno (tdesc, "fpscr")) |
| 188 | return true; |
| 189 | #endif |
| 190 | |
| 191 | /* Some kernels do not allow us to store orig_r3 or trap. */ |
| 192 | if (regno == find_regno (tdesc, "orig_r3") |
| 193 | || regno == find_regno (tdesc, "trap")) |
| 194 | return true; |
| 195 | |
| 196 | return false; |
| 197 | } |
| 198 | |
| 199 | bool |
| 200 | ppc_target::low_cannot_fetch_register (int regno) |
| 201 | { |
| 202 | return false; |
| 203 | } |
| 204 | |
| 205 | static void |
| 206 | ppc_collect_ptrace_register (struct regcache *regcache, int regno, char *buf) |
| 207 | { |
| 208 | memset (buf, 0, sizeof (long)); |
| 209 | |
| 210 | if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 211 | { |
| 212 | /* Little-endian values always sit at the left end of the buffer. */ |
| 213 | collect_register (regcache, regno, buf); |
| 214 | } |
| 215 | else if (__BYTE_ORDER == __BIG_ENDIAN) |
| 216 | { |
| 217 | /* Big-endian values sit at the right end of the buffer. In case of |
| 218 | registers whose sizes are smaller than sizeof (long), we must use a |
| 219 | padding to access them correctly. */ |
| 220 | int size = register_size (regcache->tdesc, regno); |
| 221 | |
| 222 | if (size < sizeof (long)) |
| 223 | collect_register (regcache, regno, buf + sizeof (long) - size); |
| 224 | else |
| 225 | collect_register (regcache, regno, buf); |
| 226 | } |
| 227 | else |
| 228 | perror_with_name ("Unexpected byte order"); |
| 229 | } |
| 230 | |
| 231 | static void |
| 232 | ppc_supply_ptrace_register (struct regcache *regcache, |
| 233 | int regno, const char *buf) |
| 234 | { |
| 235 | if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 236 | { |
| 237 | /* Little-endian values always sit at the left end of the buffer. */ |
| 238 | supply_register (regcache, regno, buf); |
| 239 | } |
| 240 | else if (__BYTE_ORDER == __BIG_ENDIAN) |
| 241 | { |
| 242 | /* Big-endian values sit at the right end of the buffer. In case of |
| 243 | registers whose sizes are smaller than sizeof (long), we must use a |
| 244 | padding to access them correctly. */ |
| 245 | int size = register_size (regcache->tdesc, regno); |
| 246 | |
| 247 | if (size < sizeof (long)) |
| 248 | supply_register (regcache, regno, buf + sizeof (long) - size); |
| 249 | else |
| 250 | supply_register (regcache, regno, buf); |
| 251 | } |
| 252 | else |
| 253 | perror_with_name ("Unexpected byte order"); |
| 254 | } |
| 255 | |
| 256 | bool |
| 257 | ppc_target::low_supports_breakpoints () |
| 258 | { |
| 259 | return true; |
| 260 | } |
| 261 | |
| 262 | CORE_ADDR |
| 263 | ppc_target::low_get_pc (regcache *regcache) |
| 264 | { |
| 265 | if (register_size (regcache->tdesc, 0) == 4) |
| 266 | { |
| 267 | unsigned int pc; |
| 268 | collect_register_by_name (regcache, "pc", &pc); |
| 269 | return (CORE_ADDR) pc; |
| 270 | } |
| 271 | else |
| 272 | { |
| 273 | unsigned long pc; |
| 274 | collect_register_by_name (regcache, "pc", &pc); |
| 275 | return (CORE_ADDR) pc; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | void |
| 280 | ppc_target::low_set_pc (regcache *regcache, CORE_ADDR pc) |
| 281 | { |
| 282 | if (register_size (regcache->tdesc, 0) == 4) |
| 283 | { |
| 284 | unsigned int newpc = pc; |
| 285 | supply_register_by_name (regcache, "pc", &newpc); |
| 286 | } |
| 287 | else |
| 288 | { |
| 289 | unsigned long newpc = pc; |
| 290 | supply_register_by_name (regcache, "pc", &newpc); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | #ifndef __powerpc64__ |
| 295 | static int ppc_regmap_adjusted; |
| 296 | #endif |
| 297 | |
| 298 | |
| 299 | /* Correct in either endianness. |
| 300 | This instruction is "twge r2, r2", which GDB uses as a software |
| 301 | breakpoint. */ |
| 302 | static const unsigned int ppc_breakpoint = 0x7d821008; |
| 303 | #define ppc_breakpoint_len 4 |
| 304 | |
| 305 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
| 306 | |
| 307 | const gdb_byte * |
| 308 | ppc_target::sw_breakpoint_from_kind (int kind, int *size) |
| 309 | { |
| 310 | *size = ppc_breakpoint_len; |
| 311 | return (const gdb_byte *) &ppc_breakpoint; |
| 312 | } |
| 313 | |
| 314 | bool |
| 315 | ppc_target::low_breakpoint_at (CORE_ADDR where) |
| 316 | { |
| 317 | unsigned int insn; |
| 318 | |
| 319 | read_memory (where, (unsigned char *) &insn, 4); |
| 320 | if (insn == ppc_breakpoint) |
| 321 | return true; |
| 322 | /* If necessary, recognize more trap instructions here. GDB only uses |
| 323 | the one. */ |
| 324 | |
| 325 | return false; |
| 326 | } |
| 327 | |
| 328 | /* Implement supports_z_point_type target-ops. |
| 329 | Returns true if type Z_TYPE breakpoint is supported. |
| 330 | |
| 331 | Handling software breakpoint at server side, so tracepoints |
| 332 | and breakpoints can be inserted at the same location. */ |
| 333 | |
| 334 | bool |
| 335 | ppc_target::supports_z_point_type (char z_type) |
| 336 | { |
| 337 | switch (z_type) |
| 338 | { |
| 339 | case Z_PACKET_SW_BP: |
| 340 | return true; |
| 341 | case Z_PACKET_HW_BP: |
| 342 | case Z_PACKET_WRITE_WP: |
| 343 | case Z_PACKET_ACCESS_WP: |
| 344 | default: |
| 345 | return false; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | /* Implement insert_point target-ops. |
| 350 | Returns 0 on success, -1 on failure and 1 on unsupported. */ |
| 351 | |
| 352 | static int |
| 353 | ppc_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
| 354 | int size, struct raw_breakpoint *bp) |
| 355 | { |
| 356 | switch (type) |
| 357 | { |
| 358 | case raw_bkpt_type_sw: |
| 359 | return insert_memory_breakpoint (bp); |
| 360 | |
| 361 | case raw_bkpt_type_hw: |
| 362 | case raw_bkpt_type_write_wp: |
| 363 | case raw_bkpt_type_access_wp: |
| 364 | default: |
| 365 | /* Unsupported. */ |
| 366 | return 1; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | /* Implement remove_point target-ops. |
| 371 | Returns 0 on success, -1 on failure and 1 on unsupported. */ |
| 372 | |
| 373 | static int |
| 374 | ppc_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
| 375 | int size, struct raw_breakpoint *bp) |
| 376 | { |
| 377 | switch (type) |
| 378 | { |
| 379 | case raw_bkpt_type_sw: |
| 380 | return remove_memory_breakpoint (bp); |
| 381 | |
| 382 | case raw_bkpt_type_hw: |
| 383 | case raw_bkpt_type_write_wp: |
| 384 | case raw_bkpt_type_access_wp: |
| 385 | default: |
| 386 | /* Unsupported. */ |
| 387 | return 1; |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | /* Provide only a fill function for the general register set. ps_lgetregs |
| 392 | will use this for NPTL support. */ |
| 393 | |
| 394 | static void ppc_fill_gregset (struct regcache *regcache, void *buf) |
| 395 | { |
| 396 | int i; |
| 397 | |
| 398 | for (i = 0; i < 32; i++) |
| 399 | ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]); |
| 400 | |
| 401 | for (i = 64; i < 70; i++) |
| 402 | ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]); |
| 403 | |
| 404 | for (i = 71; i < 73; i++) |
| 405 | ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]); |
| 406 | } |
| 407 | |
| 408 | /* Program Priority Register regset fill function. */ |
| 409 | |
| 410 | static void |
| 411 | ppc_fill_pprregset (struct regcache *regcache, void *buf) |
| 412 | { |
| 413 | char *ppr = (char *) buf; |
| 414 | |
| 415 | collect_register_by_name (regcache, "ppr", ppr); |
| 416 | } |
| 417 | |
| 418 | /* Program Priority Register regset store function. */ |
| 419 | |
| 420 | static void |
| 421 | ppc_store_pprregset (struct regcache *regcache, const void *buf) |
| 422 | { |
| 423 | const char *ppr = (const char *) buf; |
| 424 | |
| 425 | supply_register_by_name (regcache, "ppr", ppr); |
| 426 | } |
| 427 | |
| 428 | /* Data Stream Control Register regset fill function. */ |
| 429 | |
| 430 | static void |
| 431 | ppc_fill_dscrregset (struct regcache *regcache, void *buf) |
| 432 | { |
| 433 | char *dscr = (char *) buf; |
| 434 | |
| 435 | collect_register_by_name (regcache, "dscr", dscr); |
| 436 | } |
| 437 | |
| 438 | /* Data Stream Control Register regset store function. */ |
| 439 | |
| 440 | static void |
| 441 | ppc_store_dscrregset (struct regcache *regcache, const void *buf) |
| 442 | { |
| 443 | const char *dscr = (const char *) buf; |
| 444 | |
| 445 | supply_register_by_name (regcache, "dscr", dscr); |
| 446 | } |
| 447 | |
| 448 | /* Target Address Register regset fill function. */ |
| 449 | |
| 450 | static void |
| 451 | ppc_fill_tarregset (struct regcache *regcache, void *buf) |
| 452 | { |
| 453 | char *tar = (char *) buf; |
| 454 | |
| 455 | collect_register_by_name (regcache, "tar", tar); |
| 456 | } |
| 457 | |
| 458 | /* Target Address Register regset store function. */ |
| 459 | |
| 460 | static void |
| 461 | ppc_store_tarregset (struct regcache *regcache, const void *buf) |
| 462 | { |
| 463 | const char *tar = (const char *) buf; |
| 464 | |
| 465 | supply_register_by_name (regcache, "tar", tar); |
| 466 | } |
| 467 | |
| 468 | /* Event-Based Branching regset store function. Unless the inferior |
| 469 | has a perf event open, ptrace can return in error when reading and |
| 470 | writing to the regset, with ENODATA. For reading, the registers |
| 471 | will correctly show as unavailable. For writing, gdbserver |
| 472 | currently only caches any register writes from P and G packets and |
| 473 | the stub always tries to write all the regsets when resuming the |
| 474 | inferior, which would result in frequent warnings. For this |
| 475 | reason, we don't define a fill function. This also means that the |
| 476 | client-side regcache will be dirty if the user tries to write to |
| 477 | the EBB registers. G packets that the client sends to write to |
| 478 | unrelated registers will also include data for EBB registers, even |
| 479 | if they are unavailable. */ |
| 480 | |
| 481 | static void |
| 482 | ppc_store_ebbregset (struct regcache *regcache, const void *buf) |
| 483 | { |
| 484 | const char *regset = (const char *) buf; |
| 485 | |
| 486 | /* The order in the kernel regset is: EBBRR, EBBHR, BESCR. In the |
| 487 | .dat file is BESCR, EBBHR, EBBRR. */ |
| 488 | supply_register_by_name (regcache, "ebbrr", ®set[0]); |
| 489 | supply_register_by_name (regcache, "ebbhr", ®set[8]); |
| 490 | supply_register_by_name (regcache, "bescr", ®set[16]); |
| 491 | } |
| 492 | |
| 493 | /* Performance Monitoring Unit regset fill function. */ |
| 494 | |
| 495 | static void |
| 496 | ppc_fill_pmuregset (struct regcache *regcache, void *buf) |
| 497 | { |
| 498 | char *regset = (char *) buf; |
| 499 | |
| 500 | /* The order in the kernel regset is SIAR, SDAR, SIER, MMCR2, MMCR0. |
| 501 | In the .dat file is MMCR0, MMCR2, SIAR, SDAR, SIER. */ |
| 502 | collect_register_by_name (regcache, "siar", ®set[0]); |
| 503 | collect_register_by_name (regcache, "sdar", ®set[8]); |
| 504 | collect_register_by_name (regcache, "sier", ®set[16]); |
| 505 | collect_register_by_name (regcache, "mmcr2", ®set[24]); |
| 506 | collect_register_by_name (regcache, "mmcr0", ®set[32]); |
| 507 | } |
| 508 | |
| 509 | /* Performance Monitoring Unit regset store function. */ |
| 510 | |
| 511 | static void |
| 512 | ppc_store_pmuregset (struct regcache *regcache, const void *buf) |
| 513 | { |
| 514 | const char *regset = (const char *) buf; |
| 515 | |
| 516 | supply_register_by_name (regcache, "siar", ®set[0]); |
| 517 | supply_register_by_name (regcache, "sdar", ®set[8]); |
| 518 | supply_register_by_name (regcache, "sier", ®set[16]); |
| 519 | supply_register_by_name (regcache, "mmcr2", ®set[24]); |
| 520 | supply_register_by_name (regcache, "mmcr0", ®set[32]); |
| 521 | } |
| 522 | |
| 523 | /* Hardware Transactional Memory special-purpose register regset fill |
| 524 | function. */ |
| 525 | |
| 526 | static void |
| 527 | ppc_fill_tm_sprregset (struct regcache *regcache, void *buf) |
| 528 | { |
| 529 | int i, base; |
| 530 | char *regset = (char *) buf; |
| 531 | |
| 532 | base = find_regno (regcache->tdesc, "tfhar"); |
| 533 | for (i = 0; i < 3; i++) |
| 534 | collect_register (regcache, base + i, ®set[i * 8]); |
| 535 | } |
| 536 | |
| 537 | /* Hardware Transactional Memory special-purpose register regset store |
| 538 | function. */ |
| 539 | |
| 540 | static void |
| 541 | ppc_store_tm_sprregset (struct regcache *regcache, const void *buf) |
| 542 | { |
| 543 | int i, base; |
| 544 | const char *regset = (const char *) buf; |
| 545 | |
| 546 | base = find_regno (regcache->tdesc, "tfhar"); |
| 547 | for (i = 0; i < 3; i++) |
| 548 | supply_register (regcache, base + i, ®set[i * 8]); |
| 549 | } |
| 550 | |
| 551 | /* For the same reasons as the EBB regset, none of the HTM |
| 552 | checkpointed regsets have a fill function. These registers are |
| 553 | only available if the inferior is in a transaction. */ |
| 554 | |
| 555 | /* Hardware Transactional Memory checkpointed general-purpose regset |
| 556 | store function. */ |
| 557 | |
| 558 | static void |
| 559 | ppc_store_tm_cgprregset (struct regcache *regcache, const void *buf) |
| 560 | { |
| 561 | int i, base, size, endian_offset; |
| 562 | const char *regset = (const char *) buf; |
| 563 | |
| 564 | base = find_regno (regcache->tdesc, "cr0"); |
| 565 | size = register_size (regcache->tdesc, base); |
| 566 | |
| 567 | gdb_assert (size == 4 || size == 8); |
| 568 | |
| 569 | for (i = 0; i < 32; i++) |
| 570 | supply_register (regcache, base + i, ®set[i * size]); |
| 571 | |
| 572 | endian_offset = 0; |
| 573 | |
| 574 | if ((size == 8) && (__BYTE_ORDER == __BIG_ENDIAN)) |
| 575 | endian_offset = 4; |
| 576 | |
| 577 | supply_register_by_name (regcache, "ccr", |
| 578 | ®set[PT_CCR * size + endian_offset]); |
| 579 | |
| 580 | supply_register_by_name (regcache, "cxer", |
| 581 | ®set[PT_XER * size + endian_offset]); |
| 582 | |
| 583 | supply_register_by_name (regcache, "clr", ®set[PT_LNK * size]); |
| 584 | supply_register_by_name (regcache, "cctr", ®set[PT_CTR * size]); |
| 585 | } |
| 586 | |
| 587 | /* Hardware Transactional Memory checkpointed floating-point regset |
| 588 | store function. */ |
| 589 | |
| 590 | static void |
| 591 | ppc_store_tm_cfprregset (struct regcache *regcache, const void *buf) |
| 592 | { |
| 593 | int i, base; |
| 594 | const char *regset = (const char *) buf; |
| 595 | |
| 596 | base = find_regno (regcache->tdesc, "cf0"); |
| 597 | |
| 598 | for (i = 0; i < 32; i++) |
| 599 | supply_register (regcache, base + i, ®set[i * 8]); |
| 600 | |
| 601 | supply_register_by_name (regcache, "cfpscr", ®set[32 * 8]); |
| 602 | } |
| 603 | |
| 604 | /* Hardware Transactional Memory checkpointed vector regset store |
| 605 | function. */ |
| 606 | |
| 607 | static void |
| 608 | ppc_store_tm_cvrregset (struct regcache *regcache, const void *buf) |
| 609 | { |
| 610 | int i, base; |
| 611 | const char *regset = (const char *) buf; |
| 612 | int vscr_offset = 0; |
| 613 | |
| 614 | base = find_regno (regcache->tdesc, "cvr0"); |
| 615 | |
| 616 | for (i = 0; i < 32; i++) |
| 617 | supply_register (regcache, base + i, ®set[i * 16]); |
| 618 | |
| 619 | if (__BYTE_ORDER == __BIG_ENDIAN) |
| 620 | vscr_offset = 12; |
| 621 | |
| 622 | supply_register_by_name (regcache, "cvscr", |
| 623 | ®set[32 * 16 + vscr_offset]); |
| 624 | |
| 625 | supply_register_by_name (regcache, "cvrsave", ®set[33 * 16]); |
| 626 | } |
| 627 | |
| 628 | /* Hardware Transactional Memory checkpointed vector-scalar regset |
| 629 | store function. */ |
| 630 | |
| 631 | static void |
| 632 | ppc_store_tm_cvsxregset (struct regcache *regcache, const void *buf) |
| 633 | { |
| 634 | int i, base; |
| 635 | const char *regset = (const char *) buf; |
| 636 | |
| 637 | base = find_regno (regcache->tdesc, "cvs0h"); |
| 638 | for (i = 0; i < 32; i++) |
| 639 | supply_register (regcache, base + i, ®set[i * 8]); |
| 640 | } |
| 641 | |
| 642 | /* Hardware Transactional Memory checkpointed Program Priority |
| 643 | Register regset store function. */ |
| 644 | |
| 645 | static void |
| 646 | ppc_store_tm_cpprregset (struct regcache *regcache, const void *buf) |
| 647 | { |
| 648 | const char *cppr = (const char *) buf; |
| 649 | |
| 650 | supply_register_by_name (regcache, "cppr", cppr); |
| 651 | } |
| 652 | |
| 653 | /* Hardware Transactional Memory checkpointed Data Stream Control |
| 654 | Register regset store function. */ |
| 655 | |
| 656 | static void |
| 657 | ppc_store_tm_cdscrregset (struct regcache *regcache, const void *buf) |
| 658 | { |
| 659 | const char *cdscr = (const char *) buf; |
| 660 | |
| 661 | supply_register_by_name (regcache, "cdscr", cdscr); |
| 662 | } |
| 663 | |
| 664 | /* Hardware Transactional Memory checkpointed Target Address Register |
| 665 | regset store function. */ |
| 666 | |
| 667 | static void |
| 668 | ppc_store_tm_ctarregset (struct regcache *regcache, const void *buf) |
| 669 | { |
| 670 | const char *ctar = (const char *) buf; |
| 671 | |
| 672 | supply_register_by_name (regcache, "ctar", ctar); |
| 673 | } |
| 674 | |
| 675 | static void |
| 676 | ppc_fill_vsxregset (struct regcache *regcache, void *buf) |
| 677 | { |
| 678 | int i, base; |
| 679 | char *regset = (char *) buf; |
| 680 | |
| 681 | base = find_regno (regcache->tdesc, "vs0h"); |
| 682 | for (i = 0; i < 32; i++) |
| 683 | collect_register (regcache, base + i, ®set[i * 8]); |
| 684 | } |
| 685 | |
| 686 | static void |
| 687 | ppc_store_vsxregset (struct regcache *regcache, const void *buf) |
| 688 | { |
| 689 | int i, base; |
| 690 | const char *regset = (const char *) buf; |
| 691 | |
| 692 | base = find_regno (regcache->tdesc, "vs0h"); |
| 693 | for (i = 0; i < 32; i++) |
| 694 | supply_register (regcache, base + i, ®set[i * 8]); |
| 695 | } |
| 696 | |
| 697 | static void |
| 698 | ppc_fill_vrregset (struct regcache *regcache, void *buf) |
| 699 | { |
| 700 | int i, base; |
| 701 | char *regset = (char *) buf; |
| 702 | int vscr_offset = 0; |
| 703 | |
| 704 | base = find_regno (regcache->tdesc, "vr0"); |
| 705 | for (i = 0; i < 32; i++) |
| 706 | collect_register (regcache, base + i, ®set[i * 16]); |
| 707 | |
| 708 | if (__BYTE_ORDER == __BIG_ENDIAN) |
| 709 | vscr_offset = 12; |
| 710 | |
| 711 | collect_register_by_name (regcache, "vscr", |
| 712 | ®set[32 * 16 + vscr_offset]); |
| 713 | |
| 714 | collect_register_by_name (regcache, "vrsave", ®set[33 * 16]); |
| 715 | } |
| 716 | |
| 717 | static void |
| 718 | ppc_store_vrregset (struct regcache *regcache, const void *buf) |
| 719 | { |
| 720 | int i, base; |
| 721 | const char *regset = (const char *) buf; |
| 722 | int vscr_offset = 0; |
| 723 | |
| 724 | base = find_regno (regcache->tdesc, "vr0"); |
| 725 | for (i = 0; i < 32; i++) |
| 726 | supply_register (regcache, base + i, ®set[i * 16]); |
| 727 | |
| 728 | if (__BYTE_ORDER == __BIG_ENDIAN) |
| 729 | vscr_offset = 12; |
| 730 | |
| 731 | supply_register_by_name (regcache, "vscr", |
| 732 | ®set[32 * 16 + vscr_offset]); |
| 733 | supply_register_by_name (regcache, "vrsave", ®set[33 * 16]); |
| 734 | } |
| 735 | |
| 736 | struct gdb_evrregset_t |
| 737 | { |
| 738 | unsigned long evr[32]; |
| 739 | unsigned long long acc; |
| 740 | unsigned long spefscr; |
| 741 | }; |
| 742 | |
| 743 | static void |
| 744 | ppc_fill_evrregset (struct regcache *regcache, void *buf) |
| 745 | { |
| 746 | int i, ev0; |
| 747 | struct gdb_evrregset_t *regset = (struct gdb_evrregset_t *) buf; |
| 748 | |
| 749 | ev0 = find_regno (regcache->tdesc, "ev0h"); |
| 750 | for (i = 0; i < 32; i++) |
| 751 | collect_register (regcache, ev0 + i, ®set->evr[i]); |
| 752 | |
| 753 | collect_register_by_name (regcache, "acc", ®set->acc); |
| 754 | collect_register_by_name (regcache, "spefscr", ®set->spefscr); |
| 755 | } |
| 756 | |
| 757 | static void |
| 758 | ppc_store_evrregset (struct regcache *regcache, const void *buf) |
| 759 | { |
| 760 | int i, ev0; |
| 761 | const struct gdb_evrregset_t *regset = (const struct gdb_evrregset_t *) buf; |
| 762 | |
| 763 | ev0 = find_regno (regcache->tdesc, "ev0h"); |
| 764 | for (i = 0; i < 32; i++) |
| 765 | supply_register (regcache, ev0 + i, ®set->evr[i]); |
| 766 | |
| 767 | supply_register_by_name (regcache, "acc", ®set->acc); |
| 768 | supply_register_by_name (regcache, "spefscr", ®set->spefscr); |
| 769 | } |
| 770 | |
| 771 | /* Support for hardware single step. */ |
| 772 | |
| 773 | static int |
| 774 | ppc_supports_hardware_single_step (void) |
| 775 | { |
| 776 | return 1; |
| 777 | } |
| 778 | |
| 779 | static struct regset_info ppc_regsets[] = { |
| 780 | /* List the extra register sets before GENERAL_REGS. That way we will |
| 781 | fetch them every time, but still fall back to PTRACE_PEEKUSER for the |
| 782 | general registers. Some kernels support these, but not the newer |
| 783 | PPC_PTRACE_GETREGS. */ |
| 784 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CTAR, 0, EXTENDED_REGS, |
| 785 | NULL, ppc_store_tm_ctarregset }, |
| 786 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CDSCR, 0, EXTENDED_REGS, |
| 787 | NULL, ppc_store_tm_cdscrregset }, |
| 788 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CPPR, 0, EXTENDED_REGS, |
| 789 | NULL, ppc_store_tm_cpprregset }, |
| 790 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CVSX, 0, EXTENDED_REGS, |
| 791 | NULL, ppc_store_tm_cvsxregset }, |
| 792 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CVMX, 0, EXTENDED_REGS, |
| 793 | NULL, ppc_store_tm_cvrregset }, |
| 794 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CFPR, 0, EXTENDED_REGS, |
| 795 | NULL, ppc_store_tm_cfprregset }, |
| 796 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_CGPR, 0, EXTENDED_REGS, |
| 797 | NULL, ppc_store_tm_cgprregset }, |
| 798 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TM_SPR, 0, EXTENDED_REGS, |
| 799 | ppc_fill_tm_sprregset, ppc_store_tm_sprregset }, |
| 800 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_EBB, 0, EXTENDED_REGS, |
| 801 | NULL, ppc_store_ebbregset }, |
| 802 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_PMU, 0, EXTENDED_REGS, |
| 803 | ppc_fill_pmuregset, ppc_store_pmuregset }, |
| 804 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_TAR, 0, EXTENDED_REGS, |
| 805 | ppc_fill_tarregset, ppc_store_tarregset }, |
| 806 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_PPR, 0, EXTENDED_REGS, |
| 807 | ppc_fill_pprregset, ppc_store_pprregset }, |
| 808 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PPC_DSCR, 0, EXTENDED_REGS, |
| 809 | ppc_fill_dscrregset, ppc_store_dscrregset }, |
| 810 | { PTRACE_GETVSXREGS, PTRACE_SETVSXREGS, 0, 0, EXTENDED_REGS, |
| 811 | ppc_fill_vsxregset, ppc_store_vsxregset }, |
| 812 | { PTRACE_GETVRREGS, PTRACE_SETVRREGS, 0, 0, EXTENDED_REGS, |
| 813 | ppc_fill_vrregset, ppc_store_vrregset }, |
| 814 | { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 0, 0, EXTENDED_REGS, |
| 815 | ppc_fill_evrregset, ppc_store_evrregset }, |
| 816 | { 0, 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL }, |
| 817 | NULL_REGSET |
| 818 | }; |
| 819 | |
| 820 | static struct usrregs_info ppc_usrregs_info = |
| 821 | { |
| 822 | ppc_num_regs, |
| 823 | ppc_regmap, |
| 824 | }; |
| 825 | |
| 826 | static struct regsets_info ppc_regsets_info = |
| 827 | { |
| 828 | ppc_regsets, /* regsets */ |
| 829 | 0, /* num_regsets */ |
| 830 | NULL, /* disabled_regsets */ |
| 831 | }; |
| 832 | |
| 833 | static struct regs_info myregs_info = |
| 834 | { |
| 835 | NULL, /* regset_bitmap */ |
| 836 | &ppc_usrregs_info, |
| 837 | &ppc_regsets_info |
| 838 | }; |
| 839 | |
| 840 | const regs_info * |
| 841 | ppc_target::get_regs_info () |
| 842 | { |
| 843 | return &myregs_info; |
| 844 | } |
| 845 | |
| 846 | void |
| 847 | ppc_target::low_arch_setup () |
| 848 | { |
| 849 | const struct target_desc *tdesc; |
| 850 | struct regset_info *regset; |
| 851 | struct ppc_linux_features features = ppc_linux_no_features; |
| 852 | |
| 853 | int tid = lwpid_of (current_thread); |
| 854 | |
| 855 | features.wordsize = ppc_linux_target_wordsize (tid); |
| 856 | |
| 857 | if (features.wordsize == 4) |
| 858 | tdesc = tdesc_powerpc_32l; |
| 859 | else |
| 860 | tdesc = tdesc_powerpc_64l; |
| 861 | |
| 862 | current_process ()->tdesc = tdesc; |
| 863 | |
| 864 | /* The value of current_process ()->tdesc needs to be set for this |
| 865 | call. */ |
| 866 | ppc_hwcap = linux_get_hwcap (features.wordsize); |
| 867 | ppc_hwcap2 = linux_get_hwcap2 (features.wordsize); |
| 868 | |
| 869 | features.isa205 = ppc_linux_has_isa205 (ppc_hwcap); |
| 870 | |
| 871 | if (ppc_hwcap & PPC_FEATURE_HAS_VSX) |
| 872 | features.vsx = true; |
| 873 | |
| 874 | if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC) |
| 875 | features.altivec = true; |
| 876 | |
| 877 | if ((ppc_hwcap2 & PPC_FEATURE2_DSCR) |
| 878 | && ppc_check_regset (tid, NT_PPC_DSCR, PPC_LINUX_SIZEOF_DSCRREGSET) |
| 879 | && ppc_check_regset (tid, NT_PPC_PPR, PPC_LINUX_SIZEOF_PPRREGSET)) |
| 880 | { |
| 881 | features.ppr_dscr = true; |
| 882 | if ((ppc_hwcap2 & PPC_FEATURE2_ARCH_2_07) |
| 883 | && (ppc_hwcap2 & PPC_FEATURE2_TAR) |
| 884 | && (ppc_hwcap2 & PPC_FEATURE2_EBB) |
| 885 | && ppc_check_regset (tid, NT_PPC_TAR, |
| 886 | PPC_LINUX_SIZEOF_TARREGSET) |
| 887 | && ppc_check_regset (tid, NT_PPC_EBB, |
| 888 | PPC_LINUX_SIZEOF_EBBREGSET) |
| 889 | && ppc_check_regset (tid, NT_PPC_PMU, |
| 890 | PPC_LINUX_SIZEOF_PMUREGSET)) |
| 891 | { |
| 892 | features.isa207 = true; |
| 893 | if ((ppc_hwcap2 & PPC_FEATURE2_HTM) |
| 894 | && ppc_check_regset (tid, NT_PPC_TM_SPR, |
| 895 | PPC_LINUX_SIZEOF_TM_SPRREGSET)) |
| 896 | features.htm = true; |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | tdesc = ppc_linux_match_description (features); |
| 901 | |
| 902 | /* On 32-bit machines, check for SPE registers. |
| 903 | Set the low target's regmap field as appropriately. */ |
| 904 | #ifndef __powerpc64__ |
| 905 | if (ppc_hwcap & PPC_FEATURE_HAS_SPE) |
| 906 | tdesc = tdesc_powerpc_e500l; |
| 907 | |
| 908 | if (!ppc_regmap_adjusted) |
| 909 | { |
| 910 | if (ppc_hwcap & PPC_FEATURE_HAS_SPE) |
| 911 | ppc_usrregs_info.regmap = ppc_regmap_e500; |
| 912 | |
| 913 | /* If the FPSCR is 64-bit wide, we need to fetch the whole |
| 914 | 64-bit slot and not just its second word. The PT_FPSCR |
| 915 | supplied in a 32-bit GDB compilation doesn't reflect |
| 916 | this. */ |
| 917 | if (register_size (tdesc, 70) == 8) |
| 918 | ppc_regmap[70] = (48 + 2*32) * sizeof (long); |
| 919 | |
| 920 | ppc_regmap_adjusted = 1; |
| 921 | } |
| 922 | #endif |
| 923 | |
| 924 | current_process ()->tdesc = tdesc; |
| 925 | |
| 926 | for (regset = ppc_regsets; regset->size >= 0; regset++) |
| 927 | switch (regset->get_request) |
| 928 | { |
| 929 | case PTRACE_GETVRREGS: |
| 930 | regset->size = features.altivec ? PPC_LINUX_SIZEOF_VRREGSET : 0; |
| 931 | break; |
| 932 | case PTRACE_GETVSXREGS: |
| 933 | regset->size = features.vsx ? PPC_LINUX_SIZEOF_VSXREGSET : 0; |
| 934 | break; |
| 935 | case PTRACE_GETEVRREGS: |
| 936 | if (ppc_hwcap & PPC_FEATURE_HAS_SPE) |
| 937 | regset->size = 32 * 4 + 8 + 4; |
| 938 | else |
| 939 | regset->size = 0; |
| 940 | break; |
| 941 | case PTRACE_GETREGSET: |
| 942 | switch (regset->nt_type) |
| 943 | { |
| 944 | case NT_PPC_PPR: |
| 945 | regset->size = (features.ppr_dscr ? |
| 946 | PPC_LINUX_SIZEOF_PPRREGSET : 0); |
| 947 | break; |
| 948 | case NT_PPC_DSCR: |
| 949 | regset->size = (features.ppr_dscr ? |
| 950 | PPC_LINUX_SIZEOF_DSCRREGSET : 0); |
| 951 | break; |
| 952 | case NT_PPC_TAR: |
| 953 | regset->size = (features.isa207 ? |
| 954 | PPC_LINUX_SIZEOF_TARREGSET : 0); |
| 955 | break; |
| 956 | case NT_PPC_EBB: |
| 957 | regset->size = (features.isa207 ? |
| 958 | PPC_LINUX_SIZEOF_EBBREGSET : 0); |
| 959 | break; |
| 960 | case NT_PPC_PMU: |
| 961 | regset->size = (features.isa207 ? |
| 962 | PPC_LINUX_SIZEOF_PMUREGSET : 0); |
| 963 | break; |
| 964 | case NT_PPC_TM_SPR: |
| 965 | regset->size = (features.htm ? |
| 966 | PPC_LINUX_SIZEOF_TM_SPRREGSET : 0); |
| 967 | break; |
| 968 | case NT_PPC_TM_CGPR: |
| 969 | if (features.wordsize == 4) |
| 970 | regset->size = (features.htm ? |
| 971 | PPC32_LINUX_SIZEOF_CGPRREGSET : 0); |
| 972 | else |
| 973 | regset->size = (features.htm ? |
| 974 | PPC64_LINUX_SIZEOF_CGPRREGSET : 0); |
| 975 | break; |
| 976 | case NT_PPC_TM_CFPR: |
| 977 | regset->size = (features.htm ? |
| 978 | PPC_LINUX_SIZEOF_CFPRREGSET : 0); |
| 979 | break; |
| 980 | case NT_PPC_TM_CVMX: |
| 981 | regset->size = (features.htm ? |
| 982 | PPC_LINUX_SIZEOF_CVMXREGSET : 0); |
| 983 | break; |
| 984 | case NT_PPC_TM_CVSX: |
| 985 | regset->size = (features.htm ? |
| 986 | PPC_LINUX_SIZEOF_CVSXREGSET : 0); |
| 987 | break; |
| 988 | case NT_PPC_TM_CPPR: |
| 989 | regset->size = (features.htm ? |
| 990 | PPC_LINUX_SIZEOF_CPPRREGSET : 0); |
| 991 | break; |
| 992 | case NT_PPC_TM_CDSCR: |
| 993 | regset->size = (features.htm ? |
| 994 | PPC_LINUX_SIZEOF_CDSCRREGSET : 0); |
| 995 | break; |
| 996 | case NT_PPC_TM_CTAR: |
| 997 | regset->size = (features.htm ? |
| 998 | PPC_LINUX_SIZEOF_CTARREGSET : 0); |
| 999 | break; |
| 1000 | default: |
| 1001 | break; |
| 1002 | } |
| 1003 | break; |
| 1004 | default: |
| 1005 | break; |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | /* Implementation of linux_target_ops method "supports_tracepoints". */ |
| 1010 | |
| 1011 | static int |
| 1012 | ppc_supports_tracepoints (void) |
| 1013 | { |
| 1014 | return 1; |
| 1015 | } |
| 1016 | |
| 1017 | /* Get the thread area address. This is used to recognize which |
| 1018 | thread is which when tracing with the in-process agent library. We |
| 1019 | don't read anything from the address, and treat it as opaque; it's |
| 1020 | the address itself that we assume is unique per-thread. */ |
| 1021 | |
| 1022 | static int |
| 1023 | ppc_get_thread_area (int lwpid, CORE_ADDR *addr) |
| 1024 | { |
| 1025 | struct lwp_info *lwp = find_lwp_pid (ptid_t (lwpid)); |
| 1026 | struct thread_info *thr = get_lwp_thread (lwp); |
| 1027 | struct regcache *regcache = get_thread_regcache (thr, 1); |
| 1028 | ULONGEST tp = 0; |
| 1029 | |
| 1030 | #ifdef __powerpc64__ |
| 1031 | if (register_size (regcache->tdesc, 0) == 8) |
| 1032 | collect_register_by_name (regcache, "r13", &tp); |
| 1033 | else |
| 1034 | #endif |
| 1035 | collect_register_by_name (regcache, "r2", &tp); |
| 1036 | |
| 1037 | *addr = tp; |
| 1038 | |
| 1039 | return 0; |
| 1040 | } |
| 1041 | |
| 1042 | #ifdef __powerpc64__ |
| 1043 | |
| 1044 | /* Older glibc doesn't provide this. */ |
| 1045 | |
| 1046 | #ifndef EF_PPC64_ABI |
| 1047 | #define EF_PPC64_ABI 3 |
| 1048 | #endif |
| 1049 | |
| 1050 | /* Returns 1 if inferior is using ELFv2 ABI. Undefined for 32-bit |
| 1051 | inferiors. */ |
| 1052 | |
| 1053 | static int |
| 1054 | is_elfv2_inferior (void) |
| 1055 | { |
| 1056 | /* To be used as fallback if we're unable to determine the right result - |
| 1057 | assume inferior uses the same ABI as gdbserver. */ |
| 1058 | #if _CALL_ELF == 2 |
| 1059 | const int def_res = 1; |
| 1060 | #else |
| 1061 | const int def_res = 0; |
| 1062 | #endif |
| 1063 | CORE_ADDR phdr; |
| 1064 | Elf64_Ehdr ehdr; |
| 1065 | |
| 1066 | const struct target_desc *tdesc = current_process ()->tdesc; |
| 1067 | int wordsize = register_size (tdesc, 0); |
| 1068 | |
| 1069 | if (!linux_get_auxv (wordsize, AT_PHDR, &phdr)) |
| 1070 | return def_res; |
| 1071 | |
| 1072 | /* Assume ELF header is at the beginning of the page where program headers |
| 1073 | are located. If it doesn't look like one, bail. */ |
| 1074 | |
| 1075 | read_inferior_memory (phdr & ~0xfff, (unsigned char *) &ehdr, sizeof ehdr); |
| 1076 | if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG)) |
| 1077 | return def_res; |
| 1078 | |
| 1079 | return (ehdr.e_flags & EF_PPC64_ABI) == 2; |
| 1080 | } |
| 1081 | |
| 1082 | #endif |
| 1083 | |
| 1084 | /* Generate a ds-form instruction in BUF and return the number of bytes written |
| 1085 | |
| 1086 | 0 6 11 16 30 32 |
| 1087 | | OPCD | RST | RA | DS |XO| */ |
| 1088 | |
| 1089 | __attribute__((unused)) /* Maybe unused due to conditional compilation. */ |
| 1090 | static int |
| 1091 | gen_ds_form (uint32_t *buf, int opcd, int rst, int ra, int ds, int xo) |
| 1092 | { |
| 1093 | uint32_t insn; |
| 1094 | |
| 1095 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1096 | gdb_assert ((rst & ~0x1f) == 0); |
| 1097 | gdb_assert ((ra & ~0x1f) == 0); |
| 1098 | gdb_assert ((xo & ~0x3) == 0); |
| 1099 | |
| 1100 | insn = (rst << 21) | (ra << 16) | (ds & 0xfffc) | (xo & 0x3); |
| 1101 | *buf = (opcd << 26) | insn; |
| 1102 | return 1; |
| 1103 | } |
| 1104 | |
| 1105 | /* Followings are frequently used ds-form instructions. */ |
| 1106 | |
| 1107 | #define GEN_STD(buf, rs, ra, offset) gen_ds_form (buf, 62, rs, ra, offset, 0) |
| 1108 | #define GEN_STDU(buf, rs, ra, offset) gen_ds_form (buf, 62, rs, ra, offset, 1) |
| 1109 | #define GEN_LD(buf, rt, ra, offset) gen_ds_form (buf, 58, rt, ra, offset, 0) |
| 1110 | #define GEN_LDU(buf, rt, ra, offset) gen_ds_form (buf, 58, rt, ra, offset, 1) |
| 1111 | |
| 1112 | /* Generate a d-form instruction in BUF. |
| 1113 | |
| 1114 | 0 6 11 16 32 |
| 1115 | | OPCD | RST | RA | D | */ |
| 1116 | |
| 1117 | static int |
| 1118 | gen_d_form (uint32_t *buf, int opcd, int rst, int ra, int si) |
| 1119 | { |
| 1120 | uint32_t insn; |
| 1121 | |
| 1122 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1123 | gdb_assert ((rst & ~0x1f) == 0); |
| 1124 | gdb_assert ((ra & ~0x1f) == 0); |
| 1125 | |
| 1126 | insn = (rst << 21) | (ra << 16) | (si & 0xffff); |
| 1127 | *buf = (opcd << 26) | insn; |
| 1128 | return 1; |
| 1129 | } |
| 1130 | |
| 1131 | /* Followings are frequently used d-form instructions. */ |
| 1132 | |
| 1133 | #define GEN_ADDI(buf, rt, ra, si) gen_d_form (buf, 14, rt, ra, si) |
| 1134 | #define GEN_ADDIS(buf, rt, ra, si) gen_d_form (buf, 15, rt, ra, si) |
| 1135 | #define GEN_LI(buf, rt, si) GEN_ADDI (buf, rt, 0, si) |
| 1136 | #define GEN_LIS(buf, rt, si) GEN_ADDIS (buf, rt, 0, si) |
| 1137 | #define GEN_ORI(buf, rt, ra, si) gen_d_form (buf, 24, rt, ra, si) |
| 1138 | #define GEN_ORIS(buf, rt, ra, si) gen_d_form (buf, 25, rt, ra, si) |
| 1139 | #define GEN_LWZ(buf, rt, ra, si) gen_d_form (buf, 32, rt, ra, si) |
| 1140 | #define GEN_STW(buf, rt, ra, si) gen_d_form (buf, 36, rt, ra, si) |
| 1141 | #define GEN_STWU(buf, rt, ra, si) gen_d_form (buf, 37, rt, ra, si) |
| 1142 | |
| 1143 | /* Generate a xfx-form instruction in BUF and return the number of bytes |
| 1144 | written. |
| 1145 | |
| 1146 | 0 6 11 21 31 32 |
| 1147 | | OPCD | RST | RI | XO |/| */ |
| 1148 | |
| 1149 | static int |
| 1150 | gen_xfx_form (uint32_t *buf, int opcd, int rst, int ri, int xo) |
| 1151 | { |
| 1152 | uint32_t insn; |
| 1153 | unsigned int n = ((ri & 0x1f) << 5) | ((ri >> 5) & 0x1f); |
| 1154 | |
| 1155 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1156 | gdb_assert ((rst & ~0x1f) == 0); |
| 1157 | gdb_assert ((xo & ~0x3ff) == 0); |
| 1158 | |
| 1159 | insn = (rst << 21) | (n << 11) | (xo << 1); |
| 1160 | *buf = (opcd << 26) | insn; |
| 1161 | return 1; |
| 1162 | } |
| 1163 | |
| 1164 | /* Followings are frequently used xfx-form instructions. */ |
| 1165 | |
| 1166 | #define GEN_MFSPR(buf, rt, spr) gen_xfx_form (buf, 31, rt, spr, 339) |
| 1167 | #define GEN_MTSPR(buf, rt, spr) gen_xfx_form (buf, 31, rt, spr, 467) |
| 1168 | #define GEN_MFCR(buf, rt) gen_xfx_form (buf, 31, rt, 0, 19) |
| 1169 | #define GEN_MTCR(buf, rt) gen_xfx_form (buf, 31, rt, 0x3cf, 144) |
| 1170 | #define GEN_SYNC(buf, L, E) gen_xfx_form (buf, 31, L & 0x3, \ |
| 1171 | E & 0xf, 598) |
| 1172 | #define GEN_LWSYNC(buf) GEN_SYNC (buf, 1, 0) |
| 1173 | |
| 1174 | |
| 1175 | /* Generate a x-form instruction in BUF and return the number of bytes written. |
| 1176 | |
| 1177 | 0 6 11 16 21 31 32 |
| 1178 | | OPCD | RST | RA | RB | XO |RC| */ |
| 1179 | |
| 1180 | static int |
| 1181 | gen_x_form (uint32_t *buf, int opcd, int rst, int ra, int rb, int xo, int rc) |
| 1182 | { |
| 1183 | uint32_t insn; |
| 1184 | |
| 1185 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1186 | gdb_assert ((rst & ~0x1f) == 0); |
| 1187 | gdb_assert ((ra & ~0x1f) == 0); |
| 1188 | gdb_assert ((rb & ~0x1f) == 0); |
| 1189 | gdb_assert ((xo & ~0x3ff) == 0); |
| 1190 | gdb_assert ((rc & ~1) == 0); |
| 1191 | |
| 1192 | insn = (rst << 21) | (ra << 16) | (rb << 11) | (xo << 1) | rc; |
| 1193 | *buf = (opcd << 26) | insn; |
| 1194 | return 1; |
| 1195 | } |
| 1196 | |
| 1197 | /* Followings are frequently used x-form instructions. */ |
| 1198 | |
| 1199 | #define GEN_OR(buf, ra, rs, rb) gen_x_form (buf, 31, rs, ra, rb, 444, 0) |
| 1200 | #define GEN_MR(buf, ra, rs) GEN_OR (buf, ra, rs, rs) |
| 1201 | #define GEN_LWARX(buf, rt, ra, rb) gen_x_form (buf, 31, rt, ra, rb, 20, 0) |
| 1202 | #define GEN_STWCX(buf, rs, ra, rb) gen_x_form (buf, 31, rs, ra, rb, 150, 1) |
| 1203 | /* Assume bf = cr7. */ |
| 1204 | #define GEN_CMPW(buf, ra, rb) gen_x_form (buf, 31, 28, ra, rb, 0, 0) |
| 1205 | |
| 1206 | |
| 1207 | /* Generate a md-form instruction in BUF and return the number of bytes written. |
| 1208 | |
| 1209 | 0 6 11 16 21 27 30 31 32 |
| 1210 | | OPCD | RS | RA | sh | mb | XO |sh|Rc| */ |
| 1211 | |
| 1212 | static int |
| 1213 | gen_md_form (uint32_t *buf, int opcd, int rs, int ra, int sh, int mb, |
| 1214 | int xo, int rc) |
| 1215 | { |
| 1216 | uint32_t insn; |
| 1217 | unsigned int n = ((mb & 0x1f) << 1) | ((mb >> 5) & 0x1); |
| 1218 | unsigned int sh0_4 = sh & 0x1f; |
| 1219 | unsigned int sh5 = (sh >> 5) & 1; |
| 1220 | |
| 1221 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1222 | gdb_assert ((rs & ~0x1f) == 0); |
| 1223 | gdb_assert ((ra & ~0x1f) == 0); |
| 1224 | gdb_assert ((sh & ~0x3f) == 0); |
| 1225 | gdb_assert ((mb & ~0x3f) == 0); |
| 1226 | gdb_assert ((xo & ~0x7) == 0); |
| 1227 | gdb_assert ((rc & ~0x1) == 0); |
| 1228 | |
| 1229 | insn = (rs << 21) | (ra << 16) | (sh0_4 << 11) | (n << 5) |
| 1230 | | (sh5 << 1) | (xo << 2) | (rc & 1); |
| 1231 | *buf = (opcd << 26) | insn; |
| 1232 | return 1; |
| 1233 | } |
| 1234 | |
| 1235 | /* The following are frequently used md-form instructions. */ |
| 1236 | |
| 1237 | #define GEN_RLDICL(buf, ra, rs ,sh, mb) \ |
| 1238 | gen_md_form (buf, 30, rs, ra, sh, mb, 0, 0) |
| 1239 | #define GEN_RLDICR(buf, ra, rs ,sh, mb) \ |
| 1240 | gen_md_form (buf, 30, rs, ra, sh, mb, 1, 0) |
| 1241 | |
| 1242 | /* Generate a i-form instruction in BUF and return the number of bytes written. |
| 1243 | |
| 1244 | 0 6 30 31 32 |
| 1245 | | OPCD | LI |AA|LK| */ |
| 1246 | |
| 1247 | static int |
| 1248 | gen_i_form (uint32_t *buf, int opcd, int li, int aa, int lk) |
| 1249 | { |
| 1250 | uint32_t insn; |
| 1251 | |
| 1252 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1253 | |
| 1254 | insn = (li & 0x3fffffc) | (aa & 1) | (lk & 1); |
| 1255 | *buf = (opcd << 26) | insn; |
| 1256 | return 1; |
| 1257 | } |
| 1258 | |
| 1259 | /* The following are frequently used i-form instructions. */ |
| 1260 | |
| 1261 | #define GEN_B(buf, li) gen_i_form (buf, 18, li, 0, 0) |
| 1262 | #define GEN_BL(buf, li) gen_i_form (buf, 18, li, 0, 1) |
| 1263 | |
| 1264 | /* Generate a b-form instruction in BUF and return the number of bytes written. |
| 1265 | |
| 1266 | 0 6 11 16 30 31 32 |
| 1267 | | OPCD | BO | BI | BD |AA|LK| */ |
| 1268 | |
| 1269 | static int |
| 1270 | gen_b_form (uint32_t *buf, int opcd, int bo, int bi, int bd, |
| 1271 | int aa, int lk) |
| 1272 | { |
| 1273 | uint32_t insn; |
| 1274 | |
| 1275 | gdb_assert ((opcd & ~0x3f) == 0); |
| 1276 | gdb_assert ((bo & ~0x1f) == 0); |
| 1277 | gdb_assert ((bi & ~0x1f) == 0); |
| 1278 | |
| 1279 | insn = (bo << 21) | (bi << 16) | (bd & 0xfffc) | (aa & 1) | (lk & 1); |
| 1280 | *buf = (opcd << 26) | insn; |
| 1281 | return 1; |
| 1282 | } |
| 1283 | |
| 1284 | /* The following are frequently used b-form instructions. */ |
| 1285 | /* Assume bi = cr7. */ |
| 1286 | #define GEN_BNE(buf, bd) gen_b_form (buf, 16, 0x4, (7 << 2) | 2, bd, 0 ,0) |
| 1287 | |
| 1288 | /* GEN_LOAD and GEN_STORE generate 64- or 32-bit load/store for ppc64 or ppc32 |
| 1289 | respectively. They are primary used for save/restore GPRs in jump-pad, |
| 1290 | not used for bytecode compiling. */ |
| 1291 | |
| 1292 | #ifdef __powerpc64__ |
| 1293 | #define GEN_LOAD(buf, rt, ra, si, is_64) (is_64 ? \ |
| 1294 | GEN_LD (buf, rt, ra, si) : \ |
| 1295 | GEN_LWZ (buf, rt, ra, si)) |
| 1296 | #define GEN_STORE(buf, rt, ra, si, is_64) (is_64 ? \ |
| 1297 | GEN_STD (buf, rt, ra, si) : \ |
| 1298 | GEN_STW (buf, rt, ra, si)) |
| 1299 | #else |
| 1300 | #define GEN_LOAD(buf, rt, ra, si, is_64) GEN_LWZ (buf, rt, ra, si) |
| 1301 | #define GEN_STORE(buf, rt, ra, si, is_64) GEN_STW (buf, rt, ra, si) |
| 1302 | #endif |
| 1303 | |
| 1304 | /* Generate a sequence of instructions to load IMM in the register REG. |
| 1305 | Write the instructions in BUF and return the number of bytes written. */ |
| 1306 | |
| 1307 | static int |
| 1308 | gen_limm (uint32_t *buf, int reg, uint64_t imm, int is_64) |
| 1309 | { |
| 1310 | uint32_t *p = buf; |
| 1311 | |
| 1312 | if ((imm + 32768) < 65536) |
| 1313 | { |
| 1314 | /* li reg, imm[15:0] */ |
| 1315 | p += GEN_LI (p, reg, imm); |
| 1316 | } |
| 1317 | else if ((imm >> 32) == 0) |
| 1318 | { |
| 1319 | /* lis reg, imm[31:16] |
| 1320 | ori reg, reg, imm[15:0] |
| 1321 | rldicl reg, reg, 0, 32 */ |
| 1322 | p += GEN_LIS (p, reg, (imm >> 16) & 0xffff); |
| 1323 | if ((imm & 0xffff) != 0) |
| 1324 | p += GEN_ORI (p, reg, reg, imm & 0xffff); |
| 1325 | /* Clear upper 32-bit if sign-bit is set. */ |
| 1326 | if (imm & (1u << 31) && is_64) |
| 1327 | p += GEN_RLDICL (p, reg, reg, 0, 32); |
| 1328 | } |
| 1329 | else |
| 1330 | { |
| 1331 | gdb_assert (is_64); |
| 1332 | /* lis reg, <imm[63:48]> |
| 1333 | ori reg, reg, <imm[48:32]> |
| 1334 | rldicr reg, reg, 32, 31 |
| 1335 | oris reg, reg, <imm[31:16]> |
| 1336 | ori reg, reg, <imm[15:0]> */ |
| 1337 | p += GEN_LIS (p, reg, ((imm >> 48) & 0xffff)); |
| 1338 | if (((imm >> 32) & 0xffff) != 0) |
| 1339 | p += GEN_ORI (p, reg, reg, ((imm >> 32) & 0xffff)); |
| 1340 | p += GEN_RLDICR (p, reg, reg, 32, 31); |
| 1341 | if (((imm >> 16) & 0xffff) != 0) |
| 1342 | p += GEN_ORIS (p, reg, reg, ((imm >> 16) & 0xffff)); |
| 1343 | if ((imm & 0xffff) != 0) |
| 1344 | p += GEN_ORI (p, reg, reg, (imm & 0xffff)); |
| 1345 | } |
| 1346 | |
| 1347 | return p - buf; |
| 1348 | } |
| 1349 | |
| 1350 | /* Generate a sequence for atomically exchange at location LOCK. |
| 1351 | This code sequence clobbers r6, r7, r8. LOCK is the location for |
| 1352 | the atomic-xchg, OLD_VALUE is expected old value stored in the |
| 1353 | location, and R_NEW is a register for the new value. */ |
| 1354 | |
| 1355 | static int |
| 1356 | gen_atomic_xchg (uint32_t *buf, CORE_ADDR lock, int old_value, int r_new, |
| 1357 | int is_64) |
| 1358 | { |
| 1359 | const int r_lock = 6; |
| 1360 | const int r_old = 7; |
| 1361 | const int r_tmp = 8; |
| 1362 | uint32_t *p = buf; |
| 1363 | |
| 1364 | /* |
| 1365 | 1: lwarx TMP, 0, LOCK |
| 1366 | cmpwi TMP, OLD |
| 1367 | bne 1b |
| 1368 | stwcx. NEW, 0, LOCK |
| 1369 | bne 1b */ |
| 1370 | |
| 1371 | p += gen_limm (p, r_lock, lock, is_64); |
| 1372 | p += gen_limm (p, r_old, old_value, is_64); |
| 1373 | |
| 1374 | p += GEN_LWARX (p, r_tmp, 0, r_lock); |
| 1375 | p += GEN_CMPW (p, r_tmp, r_old); |
| 1376 | p += GEN_BNE (p, -8); |
| 1377 | p += GEN_STWCX (p, r_new, 0, r_lock); |
| 1378 | p += GEN_BNE (p, -16); |
| 1379 | |
| 1380 | return p - buf; |
| 1381 | } |
| 1382 | |
| 1383 | /* Generate a sequence of instructions for calling a function |
| 1384 | at address of FN. Return the number of bytes are written in BUF. */ |
| 1385 | |
| 1386 | static int |
| 1387 | gen_call (uint32_t *buf, CORE_ADDR fn, int is_64, int is_opd) |
| 1388 | { |
| 1389 | uint32_t *p = buf; |
| 1390 | |
| 1391 | /* Must be called by r12 for caller to calculate TOC address. */ |
| 1392 | p += gen_limm (p, 12, fn, is_64); |
| 1393 | if (is_opd) |
| 1394 | { |
| 1395 | p += GEN_LOAD (p, 11, 12, 16, is_64); |
| 1396 | p += GEN_LOAD (p, 2, 12, 8, is_64); |
| 1397 | p += GEN_LOAD (p, 12, 12, 0, is_64); |
| 1398 | } |
| 1399 | p += GEN_MTSPR (p, 12, 9); /* mtctr r12 */ |
| 1400 | *p++ = 0x4e800421; /* bctrl */ |
| 1401 | |
| 1402 | return p - buf; |
| 1403 | } |
| 1404 | |
| 1405 | /* Copy the instruction from OLDLOC to *TO, and update *TO to *TO + size |
| 1406 | of instruction. This function is used to adjust pc-relative instructions |
| 1407 | when copying. */ |
| 1408 | |
| 1409 | static void |
| 1410 | ppc_relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) |
| 1411 | { |
| 1412 | uint32_t insn, op6; |
| 1413 | long rel, newrel; |
| 1414 | |
| 1415 | read_inferior_memory (oldloc, (unsigned char *) &insn, 4); |
| 1416 | op6 = PPC_OP6 (insn); |
| 1417 | |
| 1418 | if (op6 == 18 && (insn & 2) == 0) |
| 1419 | { |
| 1420 | /* branch && AA = 0 */ |
| 1421 | rel = PPC_LI (insn); |
| 1422 | newrel = (oldloc - *to) + rel; |
| 1423 | |
| 1424 | /* Out of range. Cannot relocate instruction. */ |
| 1425 | if (newrel >= (1 << 25) || newrel < -(1 << 25)) |
| 1426 | return; |
| 1427 | |
| 1428 | insn = (insn & ~0x3fffffc) | (newrel & 0x3fffffc); |
| 1429 | } |
| 1430 | else if (op6 == 16 && (insn & 2) == 0) |
| 1431 | { |
| 1432 | /* conditional branch && AA = 0 */ |
| 1433 | |
| 1434 | /* If the new relocation is too big for even a 26-bit unconditional |
| 1435 | branch, there is nothing we can do. Just abort. |
| 1436 | |
| 1437 | Otherwise, if it can be fit in 16-bit conditional branch, just |
| 1438 | copy the instruction and relocate the address. |
| 1439 | |
| 1440 | If the it's big for conditional-branch (16-bit), try to invert the |
| 1441 | condition and jump with 26-bit branch. For example, |
| 1442 | |
| 1443 | beq .Lgoto |
| 1444 | INSN1 |
| 1445 | |
| 1446 | => |
| 1447 | |
| 1448 | bne 1f (+8) |
| 1449 | b .Lgoto |
| 1450 | 1:INSN1 |
| 1451 | |
| 1452 | After this transform, we are actually jump from *TO+4 instead of *TO, |
| 1453 | so check the relocation again because it will be 1-insn farther then |
| 1454 | before if *TO is after OLDLOC. |
| 1455 | |
| 1456 | |
| 1457 | For BDNZT (or so) is transformed from |
| 1458 | |
| 1459 | bdnzt eq, .Lgoto |
| 1460 | INSN1 |
| 1461 | |
| 1462 | => |
| 1463 | |
| 1464 | bdz 1f (+12) |
| 1465 | bf eq, 1f (+8) |
| 1466 | b .Lgoto |
| 1467 | 1:INSN1 |
| 1468 | |
| 1469 | See also "BO field encodings". */ |
| 1470 | |
| 1471 | rel = PPC_BD (insn); |
| 1472 | newrel = (oldloc - *to) + rel; |
| 1473 | |
| 1474 | if (newrel < (1 << 15) && newrel >= -(1 << 15)) |
| 1475 | insn = (insn & ~0xfffc) | (newrel & 0xfffc); |
| 1476 | else if ((PPC_BO (insn) & 0x14) == 0x4 || (PPC_BO (insn) & 0x14) == 0x10) |
| 1477 | { |
| 1478 | newrel -= 4; |
| 1479 | |
| 1480 | /* Out of range. Cannot relocate instruction. */ |
| 1481 | if (newrel >= (1 << 25) || newrel < -(1 << 25)) |
| 1482 | return; |
| 1483 | |
| 1484 | if ((PPC_BO (insn) & 0x14) == 0x4) |
| 1485 | insn ^= (1 << 24); |
| 1486 | else if ((PPC_BO (insn) & 0x14) == 0x10) |
| 1487 | insn ^= (1 << 22); |
| 1488 | |
| 1489 | /* Jump over the unconditional branch. */ |
| 1490 | insn = (insn & ~0xfffc) | 0x8; |
| 1491 | target_write_memory (*to, (unsigned char *) &insn, 4); |
| 1492 | *to += 4; |
| 1493 | |
| 1494 | /* Build a unconditional branch and copy LK bit. */ |
| 1495 | insn = (18 << 26) | (0x3fffffc & newrel) | (insn & 0x3); |
| 1496 | target_write_memory (*to, (unsigned char *) &insn, 4); |
| 1497 | *to += 4; |
| 1498 | |
| 1499 | return; |
| 1500 | } |
| 1501 | else if ((PPC_BO (insn) & 0x14) == 0) |
| 1502 | { |
| 1503 | uint32_t bdnz_insn = (16 << 26) | (0x10 << 21) | 12; |
| 1504 | uint32_t bf_insn = (16 << 26) | (0x4 << 21) | 8; |
| 1505 | |
| 1506 | newrel -= 8; |
| 1507 | |
| 1508 | /* Out of range. Cannot relocate instruction. */ |
| 1509 | if (newrel >= (1 << 25) || newrel < -(1 << 25)) |
| 1510 | return; |
| 1511 | |
| 1512 | /* Copy BI field. */ |
| 1513 | bf_insn |= (insn & 0x1f0000); |
| 1514 | |
| 1515 | /* Invert condition. */ |
| 1516 | bdnz_insn |= (insn ^ (1 << 22)) & (1 << 22); |
| 1517 | bf_insn |= (insn ^ (1 << 24)) & (1 << 24); |
| 1518 | |
| 1519 | target_write_memory (*to, (unsigned char *) &bdnz_insn, 4); |
| 1520 | *to += 4; |
| 1521 | target_write_memory (*to, (unsigned char *) &bf_insn, 4); |
| 1522 | *to += 4; |
| 1523 | |
| 1524 | /* Build a unconditional branch and copy LK bit. */ |
| 1525 | insn = (18 << 26) | (0x3fffffc & newrel) | (insn & 0x3); |
| 1526 | target_write_memory (*to, (unsigned char *) &insn, 4); |
| 1527 | *to += 4; |
| 1528 | |
| 1529 | return; |
| 1530 | } |
| 1531 | else /* (BO & 0x14) == 0x14, branch always. */ |
| 1532 | { |
| 1533 | /* Out of range. Cannot relocate instruction. */ |
| 1534 | if (newrel >= (1 << 25) || newrel < -(1 << 25)) |
| 1535 | return; |
| 1536 | |
| 1537 | /* Build a unconditional branch and copy LK bit. */ |
| 1538 | insn = (18 << 26) | (0x3fffffc & newrel) | (insn & 0x3); |
| 1539 | target_write_memory (*to, (unsigned char *) &insn, 4); |
| 1540 | *to += 4; |
| 1541 | |
| 1542 | return; |
| 1543 | } |
| 1544 | } |
| 1545 | |
| 1546 | target_write_memory (*to, (unsigned char *) &insn, 4); |
| 1547 | *to += 4; |
| 1548 | } |
| 1549 | |
| 1550 | /* Implement install_fast_tracepoint_jump_pad of target_ops. |
| 1551 | See target.h for details. */ |
| 1552 | |
| 1553 | static int |
| 1554 | ppc_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, CORE_ADDR tpaddr, |
| 1555 | CORE_ADDR collector, |
| 1556 | CORE_ADDR lockaddr, |
| 1557 | ULONGEST orig_size, |
| 1558 | CORE_ADDR *jump_entry, |
| 1559 | CORE_ADDR *trampoline, |
| 1560 | ULONGEST *trampoline_size, |
| 1561 | unsigned char *jjump_pad_insn, |
| 1562 | ULONGEST *jjump_pad_insn_size, |
| 1563 | CORE_ADDR *adjusted_insn_addr, |
| 1564 | CORE_ADDR *adjusted_insn_addr_end, |
| 1565 | char *err) |
| 1566 | { |
| 1567 | uint32_t buf[256]; |
| 1568 | uint32_t *p = buf; |
| 1569 | int j, offset; |
| 1570 | CORE_ADDR buildaddr = *jump_entry; |
| 1571 | const CORE_ADDR entryaddr = *jump_entry; |
| 1572 | int rsz, min_frame, frame_size, tp_reg; |
| 1573 | #ifdef __powerpc64__ |
| 1574 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 1575 | int is_64 = register_size (regcache->tdesc, 0) == 8; |
| 1576 | int is_opd = is_64 && !is_elfv2_inferior (); |
| 1577 | #else |
| 1578 | int is_64 = 0, is_opd = 0; |
| 1579 | #endif |
| 1580 | |
| 1581 | #ifdef __powerpc64__ |
| 1582 | if (is_64) |
| 1583 | { |
| 1584 | /* Minimum frame size is 32 bytes for ELFv2, and 112 bytes for ELFv1. */ |
| 1585 | rsz = 8; |
| 1586 | min_frame = 112; |
| 1587 | frame_size = (40 * rsz) + min_frame; |
| 1588 | tp_reg = 13; |
| 1589 | } |
| 1590 | else |
| 1591 | { |
| 1592 | #endif |
| 1593 | rsz = 4; |
| 1594 | min_frame = 16; |
| 1595 | frame_size = (40 * rsz) + min_frame; |
| 1596 | tp_reg = 2; |
| 1597 | #ifdef __powerpc64__ |
| 1598 | } |
| 1599 | #endif |
| 1600 | |
| 1601 | /* Stack frame layout for this jump pad, |
| 1602 | |
| 1603 | High thread_area (r13/r2) | |
| 1604 | tpoint - collecting_t obj |
| 1605 | PC/<tpaddr> | +36 |
| 1606 | CTR | +35 |
| 1607 | LR | +34 |
| 1608 | XER | +33 |
| 1609 | CR | +32 |
| 1610 | R31 | |
| 1611 | R29 | |
| 1612 | ... | |
| 1613 | R1 | +1 |
| 1614 | R0 - collected registers |
| 1615 | ... | |
| 1616 | ... | |
| 1617 | Low Back-chain - |
| 1618 | |
| 1619 | |
| 1620 | The code flow of this jump pad, |
| 1621 | |
| 1622 | 1. Adjust SP |
| 1623 | 2. Save GPR and SPR |
| 1624 | 3. Prepare argument |
| 1625 | 4. Call gdb_collector |
| 1626 | 5. Restore GPR and SPR |
| 1627 | 6. Restore SP |
| 1628 | 7. Build a jump for back to the program |
| 1629 | 8. Copy/relocate original instruction |
| 1630 | 9. Build a jump for replacing original instruction. */ |
| 1631 | |
| 1632 | /* Adjust stack pointer. */ |
| 1633 | if (is_64) |
| 1634 | p += GEN_STDU (p, 1, 1, -frame_size); /* stdu r1,-frame_size(r1) */ |
| 1635 | else |
| 1636 | p += GEN_STWU (p, 1, 1, -frame_size); /* stwu r1,-frame_size(r1) */ |
| 1637 | |
| 1638 | /* Store GPRs. Save R1 later, because it had just been modified, but |
| 1639 | we want the original value. */ |
| 1640 | for (j = 2; j < 32; j++) |
| 1641 | p += GEN_STORE (p, j, 1, min_frame + j * rsz, is_64); |
| 1642 | p += GEN_STORE (p, 0, 1, min_frame + 0 * rsz, is_64); |
| 1643 | /* Set r0 to the original value of r1 before adjusting stack frame, |
| 1644 | and then save it. */ |
| 1645 | p += GEN_ADDI (p, 0, 1, frame_size); |
| 1646 | p += GEN_STORE (p, 0, 1, min_frame + 1 * rsz, is_64); |
| 1647 | |
| 1648 | /* Save CR, XER, LR, and CTR. */ |
| 1649 | p += GEN_MFCR (p, 3); /* mfcr r3 */ |
| 1650 | p += GEN_MFSPR (p, 4, 1); /* mfxer r4 */ |
| 1651 | p += GEN_MFSPR (p, 5, 8); /* mflr r5 */ |
| 1652 | p += GEN_MFSPR (p, 6, 9); /* mfctr r6 */ |
| 1653 | p += GEN_STORE (p, 3, 1, min_frame + 32 * rsz, is_64);/* std r3, 32(r1) */ |
| 1654 | p += GEN_STORE (p, 4, 1, min_frame + 33 * rsz, is_64);/* std r4, 33(r1) */ |
| 1655 | p += GEN_STORE (p, 5, 1, min_frame + 34 * rsz, is_64);/* std r5, 34(r1) */ |
| 1656 | p += GEN_STORE (p, 6, 1, min_frame + 35 * rsz, is_64);/* std r6, 35(r1) */ |
| 1657 | |
| 1658 | /* Save PC<tpaddr> */ |
| 1659 | p += gen_limm (p, 3, tpaddr, is_64); |
| 1660 | p += GEN_STORE (p, 3, 1, min_frame + 36 * rsz, is_64); |
| 1661 | |
| 1662 | |
| 1663 | /* Setup arguments to collector. */ |
| 1664 | /* Set r4 to collected registers. */ |
| 1665 | p += GEN_ADDI (p, 4, 1, min_frame); |
| 1666 | /* Set r3 to TPOINT. */ |
| 1667 | p += gen_limm (p, 3, tpoint, is_64); |
| 1668 | |
| 1669 | /* Prepare collecting_t object for lock. */ |
| 1670 | p += GEN_STORE (p, 3, 1, min_frame + 37 * rsz, is_64); |
| 1671 | p += GEN_STORE (p, tp_reg, 1, min_frame + 38 * rsz, is_64); |
| 1672 | /* Set R5 to collecting object. */ |
| 1673 | p += GEN_ADDI (p, 5, 1, 37 * rsz); |
| 1674 | |
| 1675 | p += GEN_LWSYNC (p); |
| 1676 | p += gen_atomic_xchg (p, lockaddr, 0, 5, is_64); |
| 1677 | p += GEN_LWSYNC (p); |
| 1678 | |
| 1679 | /* Call to collector. */ |
| 1680 | p += gen_call (p, collector, is_64, is_opd); |
| 1681 | |
| 1682 | /* Simply write 0 to release the lock. */ |
| 1683 | p += gen_limm (p, 3, lockaddr, is_64); |
| 1684 | p += gen_limm (p, 4, 0, is_64); |
| 1685 | p += GEN_LWSYNC (p); |
| 1686 | p += GEN_STORE (p, 4, 3, 0, is_64); |
| 1687 | |
| 1688 | /* Restore stack and registers. */ |
| 1689 | p += GEN_LOAD (p, 3, 1, min_frame + 32 * rsz, is_64); /* ld r3, 32(r1) */ |
| 1690 | p += GEN_LOAD (p, 4, 1, min_frame + 33 * rsz, is_64); /* ld r4, 33(r1) */ |
| 1691 | p += GEN_LOAD (p, 5, 1, min_frame + 34 * rsz, is_64); /* ld r5, 34(r1) */ |
| 1692 | p += GEN_LOAD (p, 6, 1, min_frame + 35 * rsz, is_64); /* ld r6, 35(r1) */ |
| 1693 | p += GEN_MTCR (p, 3); /* mtcr r3 */ |
| 1694 | p += GEN_MTSPR (p, 4, 1); /* mtxer r4 */ |
| 1695 | p += GEN_MTSPR (p, 5, 8); /* mtlr r5 */ |
| 1696 | p += GEN_MTSPR (p, 6, 9); /* mtctr r6 */ |
| 1697 | |
| 1698 | /* Restore GPRs. */ |
| 1699 | for (j = 2; j < 32; j++) |
| 1700 | p += GEN_LOAD (p, j, 1, min_frame + j * rsz, is_64); |
| 1701 | p += GEN_LOAD (p, 0, 1, min_frame + 0 * rsz, is_64); |
| 1702 | /* Restore SP. */ |
| 1703 | p += GEN_ADDI (p, 1, 1, frame_size); |
| 1704 | |
| 1705 | /* Flush instructions to inferior memory. */ |
| 1706 | target_write_memory (buildaddr, (unsigned char *) buf, (p - buf) * 4); |
| 1707 | |
| 1708 | /* Now, insert the original instruction to execute in the jump pad. */ |
| 1709 | *adjusted_insn_addr = buildaddr + (p - buf) * 4; |
| 1710 | *adjusted_insn_addr_end = *adjusted_insn_addr; |
| 1711 | ppc_relocate_instruction (adjusted_insn_addr_end, tpaddr); |
| 1712 | |
| 1713 | /* Verify the relocation size. If should be 4 for normal copy, |
| 1714 | 8 or 12 for some conditional branch. */ |
| 1715 | if ((*adjusted_insn_addr_end - *adjusted_insn_addr == 0) |
| 1716 | || (*adjusted_insn_addr_end - *adjusted_insn_addr > 12)) |
| 1717 | { |
| 1718 | sprintf (err, "E.Unexpected instruction length = %d" |
| 1719 | "when relocate instruction.", |
| 1720 | (int) (*adjusted_insn_addr_end - *adjusted_insn_addr)); |
| 1721 | return 1; |
| 1722 | } |
| 1723 | |
| 1724 | buildaddr = *adjusted_insn_addr_end; |
| 1725 | p = buf; |
| 1726 | /* Finally, write a jump back to the program. */ |
| 1727 | offset = (tpaddr + 4) - buildaddr; |
| 1728 | if (offset >= (1 << 25) || offset < -(1 << 25)) |
| 1729 | { |
| 1730 | sprintf (err, "E.Jump back from jump pad too far from tracepoint " |
| 1731 | "(offset 0x%x > 26-bit).", offset); |
| 1732 | return 1; |
| 1733 | } |
| 1734 | /* b <tpaddr+4> */ |
| 1735 | p += GEN_B (p, offset); |
| 1736 | target_write_memory (buildaddr, (unsigned char *) buf, (p - buf) * 4); |
| 1737 | *jump_entry = buildaddr + (p - buf) * 4; |
| 1738 | |
| 1739 | /* The jump pad is now built. Wire in a jump to our jump pad. This |
| 1740 | is always done last (by our caller actually), so that we can |
| 1741 | install fast tracepoints with threads running. This relies on |
| 1742 | the agent's atomic write support. */ |
| 1743 | offset = entryaddr - tpaddr; |
| 1744 | if (offset >= (1 << 25) || offset < -(1 << 25)) |
| 1745 | { |
| 1746 | sprintf (err, "E.Jump back from jump pad too far from tracepoint " |
| 1747 | "(offset 0x%x > 26-bit).", offset); |
| 1748 | return 1; |
| 1749 | } |
| 1750 | /* b <jentry> */ |
| 1751 | GEN_B ((uint32_t *) jjump_pad_insn, offset); |
| 1752 | *jjump_pad_insn_size = 4; |
| 1753 | |
| 1754 | return 0; |
| 1755 | } |
| 1756 | |
| 1757 | /* Returns the minimum instruction length for installing a tracepoint. */ |
| 1758 | |
| 1759 | static int |
| 1760 | ppc_get_min_fast_tracepoint_insn_len (void) |
| 1761 | { |
| 1762 | return 4; |
| 1763 | } |
| 1764 | |
| 1765 | /* Emits a given buffer into the target at current_insn_ptr. Length |
| 1766 | is in units of 32-bit words. */ |
| 1767 | |
| 1768 | static void |
| 1769 | emit_insns (uint32_t *buf, int n) |
| 1770 | { |
| 1771 | n = n * sizeof (uint32_t); |
| 1772 | target_write_memory (current_insn_ptr, (unsigned char *) buf, n); |
| 1773 | current_insn_ptr += n; |
| 1774 | } |
| 1775 | |
| 1776 | #define __EMIT_ASM(NAME, INSNS) \ |
| 1777 | do \ |
| 1778 | { \ |
| 1779 | extern uint32_t start_bcax_ ## NAME []; \ |
| 1780 | extern uint32_t end_bcax_ ## NAME []; \ |
| 1781 | emit_insns (start_bcax_ ## NAME, \ |
| 1782 | end_bcax_ ## NAME - start_bcax_ ## NAME); \ |
| 1783 | __asm__ (".section .text.__ppcbcax\n\t" \ |
| 1784 | "start_bcax_" #NAME ":\n\t" \ |
| 1785 | INSNS "\n\t" \ |
| 1786 | "end_bcax_" #NAME ":\n\t" \ |
| 1787 | ".previous\n\t"); \ |
| 1788 | } while (0) |
| 1789 | |
| 1790 | #define _EMIT_ASM(NAME, INSNS) __EMIT_ASM (NAME, INSNS) |
| 1791 | #define EMIT_ASM(INSNS) _EMIT_ASM (__LINE__, INSNS) |
| 1792 | |
| 1793 | /* |
| 1794 | |
| 1795 | Bytecode execution stack frame - 32-bit |
| 1796 | |
| 1797 | | LR save area (SP + 4) |
| 1798 | SP' -> +- Back chain (SP + 0) |
| 1799 | | Save r31 for access saved arguments |
| 1800 | | Save r30 for bytecode stack pointer |
| 1801 | | Save r4 for incoming argument *value |
| 1802 | | Save r3 for incoming argument regs |
| 1803 | r30 -> +- Bytecode execution stack |
| 1804 | | |
| 1805 | | 64-byte (8 doublewords) at initial. |
| 1806 | | Expand stack as needed. |
| 1807 | | |
| 1808 | +- |
| 1809 | | Some padding for minimum stack frame and 16-byte alignment. |
| 1810 | | 16 bytes. |
| 1811 | SP +- Back-chain (SP') |
| 1812 | |
| 1813 | initial frame size |
| 1814 | = 16 + (4 * 4) + 64 |
| 1815 | = 96 |
| 1816 | |
| 1817 | r30 is the stack-pointer for bytecode machine. |
| 1818 | It should point to next-empty, so we can use LDU for pop. |
| 1819 | r3 is used for cache of the high part of TOP value. |
| 1820 | It was the first argument, pointer to regs. |
| 1821 | r4 is used for cache of the low part of TOP value. |
| 1822 | It was the second argument, pointer to the result. |
| 1823 | We should set *result = TOP after leaving this function. |
| 1824 | |
| 1825 | Note: |
| 1826 | * To restore stack at epilogue |
| 1827 | => sp = r31 |
| 1828 | * To check stack is big enough for bytecode execution. |
| 1829 | => r30 - 8 > SP + 8 |
| 1830 | * To return execution result. |
| 1831 | => 0(r4) = TOP |
| 1832 | |
| 1833 | */ |
| 1834 | |
| 1835 | /* Regardless of endian, register 3 is always high part, 4 is low part. |
| 1836 | These defines are used when the register pair is stored/loaded. |
| 1837 | Likewise, to simplify code, have a similiar define for 5:6. */ |
| 1838 | |
| 1839 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 1840 | #define TOP_FIRST "4" |
| 1841 | #define TOP_SECOND "3" |
| 1842 | #define TMP_FIRST "6" |
| 1843 | #define TMP_SECOND "5" |
| 1844 | #else |
| 1845 | #define TOP_FIRST "3" |
| 1846 | #define TOP_SECOND "4" |
| 1847 | #define TMP_FIRST "5" |
| 1848 | #define TMP_SECOND "6" |
| 1849 | #endif |
| 1850 | |
| 1851 | /* Emit prologue in inferior memory. See above comments. */ |
| 1852 | |
| 1853 | static void |
| 1854 | ppc_emit_prologue (void) |
| 1855 | { |
| 1856 | EMIT_ASM (/* Save return address. */ |
| 1857 | "mflr 0 \n" |
| 1858 | "stw 0, 4(1) \n" |
| 1859 | /* Adjust SP. 96 is the initial frame size. */ |
| 1860 | "stwu 1, -96(1) \n" |
| 1861 | /* Save r30 and incoming arguments. */ |
| 1862 | "stw 31, 96-4(1) \n" |
| 1863 | "stw 30, 96-8(1) \n" |
| 1864 | "stw 4, 96-12(1) \n" |
| 1865 | "stw 3, 96-16(1) \n" |
| 1866 | /* Point r31 to original r1 for access arguments. */ |
| 1867 | "addi 31, 1, 96 \n" |
| 1868 | /* Set r30 to pointing stack-top. */ |
| 1869 | "addi 30, 1, 64 \n" |
| 1870 | /* Initial r3/TOP to 0. */ |
| 1871 | "li 3, 0 \n" |
| 1872 | "li 4, 0 \n"); |
| 1873 | } |
| 1874 | |
| 1875 | /* Emit epilogue in inferior memory. See above comments. */ |
| 1876 | |
| 1877 | static void |
| 1878 | ppc_emit_epilogue (void) |
| 1879 | { |
| 1880 | EMIT_ASM (/* *result = TOP */ |
| 1881 | "lwz 5, -12(31) \n" |
| 1882 | "stw " TOP_FIRST ", 0(5) \n" |
| 1883 | "stw " TOP_SECOND ", 4(5) \n" |
| 1884 | /* Restore registers. */ |
| 1885 | "lwz 31, -4(31) \n" |
| 1886 | "lwz 30, -8(31) \n" |
| 1887 | /* Restore SP. */ |
| 1888 | "lwz 1, 0(1) \n" |
| 1889 | /* Restore LR. */ |
| 1890 | "lwz 0, 4(1) \n" |
| 1891 | /* Return 0 for no-error. */ |
| 1892 | "li 3, 0 \n" |
| 1893 | "mtlr 0 \n" |
| 1894 | "blr \n"); |
| 1895 | } |
| 1896 | |
| 1897 | /* TOP = stack[--sp] + TOP */ |
| 1898 | |
| 1899 | static void |
| 1900 | ppc_emit_add (void) |
| 1901 | { |
| 1902 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 1903 | "lwz " TMP_SECOND ", 4(30)\n" |
| 1904 | "addc 4, 6, 4 \n" |
| 1905 | "adde 3, 5, 3 \n"); |
| 1906 | } |
| 1907 | |
| 1908 | /* TOP = stack[--sp] - TOP */ |
| 1909 | |
| 1910 | static void |
| 1911 | ppc_emit_sub (void) |
| 1912 | { |
| 1913 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 1914 | "lwz " TMP_SECOND ", 4(30) \n" |
| 1915 | "subfc 4, 4, 6 \n" |
| 1916 | "subfe 3, 3, 5 \n"); |
| 1917 | } |
| 1918 | |
| 1919 | /* TOP = stack[--sp] * TOP */ |
| 1920 | |
| 1921 | static void |
| 1922 | ppc_emit_mul (void) |
| 1923 | { |
| 1924 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 1925 | "lwz " TMP_SECOND ", 4(30) \n" |
| 1926 | "mulhwu 7, 6, 4 \n" |
| 1927 | "mullw 3, 6, 3 \n" |
| 1928 | "mullw 5, 4, 5 \n" |
| 1929 | "mullw 4, 6, 4 \n" |
| 1930 | "add 3, 5, 3 \n" |
| 1931 | "add 3, 7, 3 \n"); |
| 1932 | } |
| 1933 | |
| 1934 | /* TOP = stack[--sp] << TOP */ |
| 1935 | |
| 1936 | static void |
| 1937 | ppc_emit_lsh (void) |
| 1938 | { |
| 1939 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 1940 | "lwz " TMP_SECOND ", 4(30) \n" |
| 1941 | "subfic 3, 4, 32\n" /* r3 = 32 - TOP */ |
| 1942 | "addi 7, 4, -32\n" /* r7 = TOP - 32 */ |
| 1943 | "slw 5, 5, 4\n" /* Shift high part left */ |
| 1944 | "slw 4, 6, 4\n" /* Shift low part left */ |
| 1945 | "srw 3, 6, 3\n" /* Shift low to high if shift < 32 */ |
| 1946 | "slw 7, 6, 7\n" /* Shift low to high if shift >= 32 */ |
| 1947 | "or 3, 5, 3\n" |
| 1948 | "or 3, 7, 3\n"); /* Assemble high part */ |
| 1949 | } |
| 1950 | |
| 1951 | /* Top = stack[--sp] >> TOP |
| 1952 | (Arithmetic shift right) */ |
| 1953 | |
| 1954 | static void |
| 1955 | ppc_emit_rsh_signed (void) |
| 1956 | { |
| 1957 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 1958 | "lwz " TMP_SECOND ", 4(30) \n" |
| 1959 | "addi 7, 4, -32\n" /* r7 = TOP - 32 */ |
| 1960 | "sraw 3, 5, 4\n" /* Shift high part right */ |
| 1961 | "cmpwi 7, 1\n" |
| 1962 | "blt 0, 1f\n" /* If shift <= 32, goto 1: */ |
| 1963 | "sraw 4, 5, 7\n" /* Shift high to low */ |
| 1964 | "b 2f\n" |
| 1965 | "1:\n" |
| 1966 | "subfic 7, 4, 32\n" /* r7 = 32 - TOP */ |
| 1967 | "srw 4, 6, 4\n" /* Shift low part right */ |
| 1968 | "slw 5, 5, 7\n" /* Shift high to low */ |
| 1969 | "or 4, 4, 5\n" /* Assemble low part */ |
| 1970 | "2:\n"); |
| 1971 | } |
| 1972 | |
| 1973 | /* Top = stack[--sp] >> TOP |
| 1974 | (Logical shift right) */ |
| 1975 | |
| 1976 | static void |
| 1977 | ppc_emit_rsh_unsigned (void) |
| 1978 | { |
| 1979 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 1980 | "lwz " TMP_SECOND ", 4(30) \n" |
| 1981 | "subfic 3, 4, 32\n" /* r3 = 32 - TOP */ |
| 1982 | "addi 7, 4, -32\n" /* r7 = TOP - 32 */ |
| 1983 | "srw 6, 6, 4\n" /* Shift low part right */ |
| 1984 | "slw 3, 5, 3\n" /* Shift high to low if shift < 32 */ |
| 1985 | "srw 7, 5, 7\n" /* Shift high to low if shift >= 32 */ |
| 1986 | "or 6, 6, 3\n" |
| 1987 | "srw 3, 5, 4\n" /* Shift high part right */ |
| 1988 | "or 4, 6, 7\n"); /* Assemble low part */ |
| 1989 | } |
| 1990 | |
| 1991 | /* Emit code for signed-extension specified by ARG. */ |
| 1992 | |
| 1993 | static void |
| 1994 | ppc_emit_ext (int arg) |
| 1995 | { |
| 1996 | switch (arg) |
| 1997 | { |
| 1998 | case 8: |
| 1999 | EMIT_ASM ("extsb 4, 4\n" |
| 2000 | "srawi 3, 4, 31"); |
| 2001 | break; |
| 2002 | case 16: |
| 2003 | EMIT_ASM ("extsh 4, 4\n" |
| 2004 | "srawi 3, 4, 31"); |
| 2005 | break; |
| 2006 | case 32: |
| 2007 | EMIT_ASM ("srawi 3, 4, 31"); |
| 2008 | break; |
| 2009 | default: |
| 2010 | emit_error = 1; |
| 2011 | } |
| 2012 | } |
| 2013 | |
| 2014 | /* Emit code for zero-extension specified by ARG. */ |
| 2015 | |
| 2016 | static void |
| 2017 | ppc_emit_zero_ext (int arg) |
| 2018 | { |
| 2019 | switch (arg) |
| 2020 | { |
| 2021 | case 8: |
| 2022 | EMIT_ASM ("clrlwi 4,4,24\n" |
| 2023 | "li 3, 0\n"); |
| 2024 | break; |
| 2025 | case 16: |
| 2026 | EMIT_ASM ("clrlwi 4,4,16\n" |
| 2027 | "li 3, 0\n"); |
| 2028 | break; |
| 2029 | case 32: |
| 2030 | EMIT_ASM ("li 3, 0"); |
| 2031 | break; |
| 2032 | default: |
| 2033 | emit_error = 1; |
| 2034 | } |
| 2035 | } |
| 2036 | |
| 2037 | /* TOP = !TOP |
| 2038 | i.e., TOP = (TOP == 0) ? 1 : 0; */ |
| 2039 | |
| 2040 | static void |
| 2041 | ppc_emit_log_not (void) |
| 2042 | { |
| 2043 | EMIT_ASM ("or 4, 3, 4 \n" |
| 2044 | "cntlzw 4, 4 \n" |
| 2045 | "srwi 4, 4, 5 \n" |
| 2046 | "li 3, 0 \n"); |
| 2047 | } |
| 2048 | |
| 2049 | /* TOP = stack[--sp] & TOP */ |
| 2050 | |
| 2051 | static void |
| 2052 | ppc_emit_bit_and (void) |
| 2053 | { |
| 2054 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2055 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2056 | "and 4, 6, 4 \n" |
| 2057 | "and 3, 5, 3 \n"); |
| 2058 | } |
| 2059 | |
| 2060 | /* TOP = stack[--sp] | TOP */ |
| 2061 | |
| 2062 | static void |
| 2063 | ppc_emit_bit_or (void) |
| 2064 | { |
| 2065 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2066 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2067 | "or 4, 6, 4 \n" |
| 2068 | "or 3, 5, 3 \n"); |
| 2069 | } |
| 2070 | |
| 2071 | /* TOP = stack[--sp] ^ TOP */ |
| 2072 | |
| 2073 | static void |
| 2074 | ppc_emit_bit_xor (void) |
| 2075 | { |
| 2076 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2077 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2078 | "xor 4, 6, 4 \n" |
| 2079 | "xor 3, 5, 3 \n"); |
| 2080 | } |
| 2081 | |
| 2082 | /* TOP = ~TOP |
| 2083 | i.e., TOP = ~(TOP | TOP) */ |
| 2084 | |
| 2085 | static void |
| 2086 | ppc_emit_bit_not (void) |
| 2087 | { |
| 2088 | EMIT_ASM ("nor 3, 3, 3 \n" |
| 2089 | "nor 4, 4, 4 \n"); |
| 2090 | } |
| 2091 | |
| 2092 | /* TOP = stack[--sp] == TOP */ |
| 2093 | |
| 2094 | static void |
| 2095 | ppc_emit_equal (void) |
| 2096 | { |
| 2097 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2098 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2099 | "xor 4, 6, 4 \n" |
| 2100 | "xor 3, 5, 3 \n" |
| 2101 | "or 4, 3, 4 \n" |
| 2102 | "cntlzw 4, 4 \n" |
| 2103 | "srwi 4, 4, 5 \n" |
| 2104 | "li 3, 0 \n"); |
| 2105 | } |
| 2106 | |
| 2107 | /* TOP = stack[--sp] < TOP |
| 2108 | (Signed comparison) */ |
| 2109 | |
| 2110 | static void |
| 2111 | ppc_emit_less_signed (void) |
| 2112 | { |
| 2113 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2114 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2115 | "cmplw 6, 6, 4 \n" |
| 2116 | "cmpw 7, 5, 3 \n" |
| 2117 | /* CR6 bit 0 = low less and high equal */ |
| 2118 | "crand 6*4+0, 6*4+0, 7*4+2\n" |
| 2119 | /* CR7 bit 0 = (low less and high equal) or high less */ |
| 2120 | "cror 7*4+0, 7*4+0, 6*4+0\n" |
| 2121 | "mfcr 4 \n" |
| 2122 | "rlwinm 4, 4, 29, 31, 31 \n" |
| 2123 | "li 3, 0 \n"); |
| 2124 | } |
| 2125 | |
| 2126 | /* TOP = stack[--sp] < TOP |
| 2127 | (Unsigned comparison) */ |
| 2128 | |
| 2129 | static void |
| 2130 | ppc_emit_less_unsigned (void) |
| 2131 | { |
| 2132 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2133 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2134 | "cmplw 6, 6, 4 \n" |
| 2135 | "cmplw 7, 5, 3 \n" |
| 2136 | /* CR6 bit 0 = low less and high equal */ |
| 2137 | "crand 6*4+0, 6*4+0, 7*4+2\n" |
| 2138 | /* CR7 bit 0 = (low less and high equal) or high less */ |
| 2139 | "cror 7*4+0, 7*4+0, 6*4+0\n" |
| 2140 | "mfcr 4 \n" |
| 2141 | "rlwinm 4, 4, 29, 31, 31 \n" |
| 2142 | "li 3, 0 \n"); |
| 2143 | } |
| 2144 | |
| 2145 | /* Access the memory address in TOP in size of SIZE. |
| 2146 | Zero-extend the read value. */ |
| 2147 | |
| 2148 | static void |
| 2149 | ppc_emit_ref (int size) |
| 2150 | { |
| 2151 | switch (size) |
| 2152 | { |
| 2153 | case 1: |
| 2154 | EMIT_ASM ("lbz 4, 0(4)\n" |
| 2155 | "li 3, 0"); |
| 2156 | break; |
| 2157 | case 2: |
| 2158 | EMIT_ASM ("lhz 4, 0(4)\n" |
| 2159 | "li 3, 0"); |
| 2160 | break; |
| 2161 | case 4: |
| 2162 | EMIT_ASM ("lwz 4, 0(4)\n" |
| 2163 | "li 3, 0"); |
| 2164 | break; |
| 2165 | case 8: |
| 2166 | if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 2167 | EMIT_ASM ("lwz 3, 4(4)\n" |
| 2168 | "lwz 4, 0(4)"); |
| 2169 | else |
| 2170 | EMIT_ASM ("lwz 3, 0(4)\n" |
| 2171 | "lwz 4, 4(4)"); |
| 2172 | break; |
| 2173 | } |
| 2174 | } |
| 2175 | |
| 2176 | /* TOP = NUM */ |
| 2177 | |
| 2178 | static void |
| 2179 | ppc_emit_const (LONGEST num) |
| 2180 | { |
| 2181 | uint32_t buf[10]; |
| 2182 | uint32_t *p = buf; |
| 2183 | |
| 2184 | p += gen_limm (p, 3, num >> 32 & 0xffffffff, 0); |
| 2185 | p += gen_limm (p, 4, num & 0xffffffff, 0); |
| 2186 | |
| 2187 | emit_insns (buf, p - buf); |
| 2188 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2189 | } |
| 2190 | |
| 2191 | /* Set TOP to the value of register REG by calling get_raw_reg function |
| 2192 | with two argument, collected buffer and register number. */ |
| 2193 | |
| 2194 | static void |
| 2195 | ppc_emit_reg (int reg) |
| 2196 | { |
| 2197 | uint32_t buf[13]; |
| 2198 | uint32_t *p = buf; |
| 2199 | |
| 2200 | /* fctx->regs is passed in r3 and then saved in -16(31). */ |
| 2201 | p += GEN_LWZ (p, 3, 31, -16); |
| 2202 | p += GEN_LI (p, 4, reg); /* li r4, reg */ |
| 2203 | p += gen_call (p, get_raw_reg_func_addr (), 0, 0); |
| 2204 | |
| 2205 | emit_insns (buf, p - buf); |
| 2206 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2207 | |
| 2208 | if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 2209 | { |
| 2210 | EMIT_ASM ("mr 5, 4\n" |
| 2211 | "mr 4, 3\n" |
| 2212 | "mr 3, 5\n"); |
| 2213 | } |
| 2214 | } |
| 2215 | |
| 2216 | /* TOP = stack[--sp] */ |
| 2217 | |
| 2218 | static void |
| 2219 | ppc_emit_pop (void) |
| 2220 | { |
| 2221 | EMIT_ASM ("lwzu " TOP_FIRST ", 8(30) \n" |
| 2222 | "lwz " TOP_SECOND ", 4(30) \n"); |
| 2223 | } |
| 2224 | |
| 2225 | /* stack[sp++] = TOP |
| 2226 | |
| 2227 | Because we may use up bytecode stack, expand 8 doublewords more |
| 2228 | if needed. */ |
| 2229 | |
| 2230 | static void |
| 2231 | ppc_emit_stack_flush (void) |
| 2232 | { |
| 2233 | /* Make sure bytecode stack is big enough before push. |
| 2234 | Otherwise, expand 64-byte more. */ |
| 2235 | |
| 2236 | EMIT_ASM (" stw " TOP_FIRST ", 0(30) \n" |
| 2237 | " stw " TOP_SECOND ", 4(30)\n" |
| 2238 | " addi 5, 30, -(8 + 8) \n" |
| 2239 | " cmpw 7, 5, 1 \n" |
| 2240 | " bgt 7, 1f \n" |
| 2241 | " stwu 31, -64(1) \n" |
| 2242 | "1:addi 30, 30, -8 \n"); |
| 2243 | } |
| 2244 | |
| 2245 | /* Swap TOP and stack[sp-1] */ |
| 2246 | |
| 2247 | static void |
| 2248 | ppc_emit_swap (void) |
| 2249 | { |
| 2250 | EMIT_ASM ("lwz " TMP_FIRST ", 8(30) \n" |
| 2251 | "lwz " TMP_SECOND ", 12(30) \n" |
| 2252 | "stw " TOP_FIRST ", 8(30) \n" |
| 2253 | "stw " TOP_SECOND ", 12(30) \n" |
| 2254 | "mr 3, 5 \n" |
| 2255 | "mr 4, 6 \n"); |
| 2256 | } |
| 2257 | |
| 2258 | /* Discard N elements in the stack. Also used for ppc64. */ |
| 2259 | |
| 2260 | static void |
| 2261 | ppc_emit_stack_adjust (int n) |
| 2262 | { |
| 2263 | uint32_t buf[6]; |
| 2264 | uint32_t *p = buf; |
| 2265 | |
| 2266 | n = n << 3; |
| 2267 | if ((n >> 15) != 0) |
| 2268 | { |
| 2269 | emit_error = 1; |
| 2270 | return; |
| 2271 | } |
| 2272 | |
| 2273 | p += GEN_ADDI (p, 30, 30, n); |
| 2274 | |
| 2275 | emit_insns (buf, p - buf); |
| 2276 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2277 | } |
| 2278 | |
| 2279 | /* Call function FN. */ |
| 2280 | |
| 2281 | static void |
| 2282 | ppc_emit_call (CORE_ADDR fn) |
| 2283 | { |
| 2284 | uint32_t buf[11]; |
| 2285 | uint32_t *p = buf; |
| 2286 | |
| 2287 | p += gen_call (p, fn, 0, 0); |
| 2288 | |
| 2289 | emit_insns (buf, p - buf); |
| 2290 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2291 | } |
| 2292 | |
| 2293 | /* FN's prototype is `LONGEST(*fn)(int)'. |
| 2294 | TOP = fn (arg1) |
| 2295 | */ |
| 2296 | |
| 2297 | static void |
| 2298 | ppc_emit_int_call_1 (CORE_ADDR fn, int arg1) |
| 2299 | { |
| 2300 | uint32_t buf[15]; |
| 2301 | uint32_t *p = buf; |
| 2302 | |
| 2303 | /* Setup argument. arg1 is a 16-bit value. */ |
| 2304 | p += gen_limm (p, 3, (uint32_t) arg1, 0); |
| 2305 | p += gen_call (p, fn, 0, 0); |
| 2306 | |
| 2307 | emit_insns (buf, p - buf); |
| 2308 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2309 | |
| 2310 | if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 2311 | { |
| 2312 | EMIT_ASM ("mr 5, 4\n" |
| 2313 | "mr 4, 3\n" |
| 2314 | "mr 3, 5\n"); |
| 2315 | } |
| 2316 | } |
| 2317 | |
| 2318 | /* FN's prototype is `void(*fn)(int,LONGEST)'. |
| 2319 | fn (arg1, TOP) |
| 2320 | |
| 2321 | TOP should be preserved/restored before/after the call. */ |
| 2322 | |
| 2323 | static void |
| 2324 | ppc_emit_void_call_2 (CORE_ADDR fn, int arg1) |
| 2325 | { |
| 2326 | uint32_t buf[21]; |
| 2327 | uint32_t *p = buf; |
| 2328 | |
| 2329 | /* Save TOP. 0(30) is next-empty. */ |
| 2330 | p += GEN_STW (p, 3, 30, 0); |
| 2331 | p += GEN_STW (p, 4, 30, 4); |
| 2332 | |
| 2333 | /* Setup argument. arg1 is a 16-bit value. */ |
| 2334 | if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 2335 | { |
| 2336 | p += GEN_MR (p, 5, 4); |
| 2337 | p += GEN_MR (p, 6, 3); |
| 2338 | } |
| 2339 | else |
| 2340 | { |
| 2341 | p += GEN_MR (p, 5, 3); |
| 2342 | p += GEN_MR (p, 6, 4); |
| 2343 | } |
| 2344 | p += gen_limm (p, 3, (uint32_t) arg1, 0); |
| 2345 | p += gen_call (p, fn, 0, 0); |
| 2346 | |
| 2347 | /* Restore TOP */ |
| 2348 | p += GEN_LWZ (p, 3, 30, 0); |
| 2349 | p += GEN_LWZ (p, 4, 30, 4); |
| 2350 | |
| 2351 | emit_insns (buf, p - buf); |
| 2352 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2353 | } |
| 2354 | |
| 2355 | /* Note in the following goto ops: |
| 2356 | |
| 2357 | When emitting goto, the target address is later relocated by |
| 2358 | write_goto_address. OFFSET_P is the offset of the branch instruction |
| 2359 | in the code sequence, and SIZE_P is how to relocate the instruction, |
| 2360 | recognized by ppc_write_goto_address. In current implementation, |
| 2361 | SIZE can be either 24 or 14 for branch of conditional-branch instruction. |
| 2362 | */ |
| 2363 | |
| 2364 | /* If TOP is true, goto somewhere. Otherwise, just fall-through. */ |
| 2365 | |
| 2366 | static void |
| 2367 | ppc_emit_if_goto (int *offset_p, int *size_p) |
| 2368 | { |
| 2369 | EMIT_ASM ("or. 3, 3, 4 \n" |
| 2370 | "lwzu " TOP_FIRST ", 8(30) \n" |
| 2371 | "lwz " TOP_SECOND ", 4(30) \n" |
| 2372 | "1:bne 0, 1b \n"); |
| 2373 | |
| 2374 | if (offset_p) |
| 2375 | *offset_p = 12; |
| 2376 | if (size_p) |
| 2377 | *size_p = 14; |
| 2378 | } |
| 2379 | |
| 2380 | /* Unconditional goto. Also used for ppc64. */ |
| 2381 | |
| 2382 | static void |
| 2383 | ppc_emit_goto (int *offset_p, int *size_p) |
| 2384 | { |
| 2385 | EMIT_ASM ("1:b 1b"); |
| 2386 | |
| 2387 | if (offset_p) |
| 2388 | *offset_p = 0; |
| 2389 | if (size_p) |
| 2390 | *size_p = 24; |
| 2391 | } |
| 2392 | |
| 2393 | /* Goto if stack[--sp] == TOP */ |
| 2394 | |
| 2395 | static void |
| 2396 | ppc_emit_eq_goto (int *offset_p, int *size_p) |
| 2397 | { |
| 2398 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2399 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2400 | "xor 4, 6, 4 \n" |
| 2401 | "xor 3, 5, 3 \n" |
| 2402 | "or. 3, 3, 4 \n" |
| 2403 | "lwzu " TOP_FIRST ", 8(30) \n" |
| 2404 | "lwz " TOP_SECOND ", 4(30) \n" |
| 2405 | "1:beq 0, 1b \n"); |
| 2406 | |
| 2407 | if (offset_p) |
| 2408 | *offset_p = 28; |
| 2409 | if (size_p) |
| 2410 | *size_p = 14; |
| 2411 | } |
| 2412 | |
| 2413 | /* Goto if stack[--sp] != TOP */ |
| 2414 | |
| 2415 | static void |
| 2416 | ppc_emit_ne_goto (int *offset_p, int *size_p) |
| 2417 | { |
| 2418 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2419 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2420 | "xor 4, 6, 4 \n" |
| 2421 | "xor 3, 5, 3 \n" |
| 2422 | "or. 3, 3, 4 \n" |
| 2423 | "lwzu " TOP_FIRST ", 8(30) \n" |
| 2424 | "lwz " TOP_SECOND ", 4(30) \n" |
| 2425 | "1:bne 0, 1b \n"); |
| 2426 | |
| 2427 | if (offset_p) |
| 2428 | *offset_p = 28; |
| 2429 | if (size_p) |
| 2430 | *size_p = 14; |
| 2431 | } |
| 2432 | |
| 2433 | /* Goto if stack[--sp] < TOP */ |
| 2434 | |
| 2435 | static void |
| 2436 | ppc_emit_lt_goto (int *offset_p, int *size_p) |
| 2437 | { |
| 2438 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2439 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2440 | "cmplw 6, 6, 4 \n" |
| 2441 | "cmpw 7, 5, 3 \n" |
| 2442 | /* CR6 bit 0 = low less and high equal */ |
| 2443 | "crand 6*4+0, 6*4+0, 7*4+2\n" |
| 2444 | /* CR7 bit 0 = (low less and high equal) or high less */ |
| 2445 | "cror 7*4+0, 7*4+0, 6*4+0\n" |
| 2446 | "lwzu " TOP_FIRST ", 8(30) \n" |
| 2447 | "lwz " TOP_SECOND ", 4(30)\n" |
| 2448 | "1:blt 7, 1b \n"); |
| 2449 | |
| 2450 | if (offset_p) |
| 2451 | *offset_p = 32; |
| 2452 | if (size_p) |
| 2453 | *size_p = 14; |
| 2454 | } |
| 2455 | |
| 2456 | /* Goto if stack[--sp] <= TOP */ |
| 2457 | |
| 2458 | static void |
| 2459 | ppc_emit_le_goto (int *offset_p, int *size_p) |
| 2460 | { |
| 2461 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2462 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2463 | "cmplw 6, 6, 4 \n" |
| 2464 | "cmpw 7, 5, 3 \n" |
| 2465 | /* CR6 bit 0 = low less/equal and high equal */ |
| 2466 | "crandc 6*4+0, 7*4+2, 6*4+1\n" |
| 2467 | /* CR7 bit 0 = (low less/eq and high equal) or high less */ |
| 2468 | "cror 7*4+0, 7*4+0, 6*4+0\n" |
| 2469 | "lwzu " TOP_FIRST ", 8(30) \n" |
| 2470 | "lwz " TOP_SECOND ", 4(30)\n" |
| 2471 | "1:blt 7, 1b \n"); |
| 2472 | |
| 2473 | if (offset_p) |
| 2474 | *offset_p = 32; |
| 2475 | if (size_p) |
| 2476 | *size_p = 14; |
| 2477 | } |
| 2478 | |
| 2479 | /* Goto if stack[--sp] > TOP */ |
| 2480 | |
| 2481 | static void |
| 2482 | ppc_emit_gt_goto (int *offset_p, int *size_p) |
| 2483 | { |
| 2484 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2485 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2486 | "cmplw 6, 6, 4 \n" |
| 2487 | "cmpw 7, 5, 3 \n" |
| 2488 | /* CR6 bit 0 = low greater and high equal */ |
| 2489 | "crand 6*4+0, 6*4+1, 7*4+2\n" |
| 2490 | /* CR7 bit 0 = (low greater and high equal) or high greater */ |
| 2491 | "cror 7*4+0, 7*4+1, 6*4+0\n" |
| 2492 | "lwzu " TOP_FIRST ", 8(30) \n" |
| 2493 | "lwz " TOP_SECOND ", 4(30)\n" |
| 2494 | "1:blt 7, 1b \n"); |
| 2495 | |
| 2496 | if (offset_p) |
| 2497 | *offset_p = 32; |
| 2498 | if (size_p) |
| 2499 | *size_p = 14; |
| 2500 | } |
| 2501 | |
| 2502 | /* Goto if stack[--sp] >= TOP */ |
| 2503 | |
| 2504 | static void |
| 2505 | ppc_emit_ge_goto (int *offset_p, int *size_p) |
| 2506 | { |
| 2507 | EMIT_ASM ("lwzu " TMP_FIRST ", 8(30) \n" |
| 2508 | "lwz " TMP_SECOND ", 4(30) \n" |
| 2509 | "cmplw 6, 6, 4 \n" |
| 2510 | "cmpw 7, 5, 3 \n" |
| 2511 | /* CR6 bit 0 = low ge and high equal */ |
| 2512 | "crandc 6*4+0, 7*4+2, 6*4+0\n" |
| 2513 | /* CR7 bit 0 = (low ge and high equal) or high greater */ |
| 2514 | "cror 7*4+0, 7*4+1, 6*4+0\n" |
| 2515 | "lwzu " TOP_FIRST ", 8(30)\n" |
| 2516 | "lwz " TOP_SECOND ", 4(30)\n" |
| 2517 | "1:blt 7, 1b \n"); |
| 2518 | |
| 2519 | if (offset_p) |
| 2520 | *offset_p = 32; |
| 2521 | if (size_p) |
| 2522 | *size_p = 14; |
| 2523 | } |
| 2524 | |
| 2525 | /* Relocate previous emitted branch instruction. FROM is the address |
| 2526 | of the branch instruction, TO is the goto target address, and SIZE |
| 2527 | if the value we set by *SIZE_P before. Currently, it is either |
| 2528 | 24 or 14 of branch and conditional-branch instruction. |
| 2529 | Also used for ppc64. */ |
| 2530 | |
| 2531 | static void |
| 2532 | ppc_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) |
| 2533 | { |
| 2534 | long rel = to - from; |
| 2535 | uint32_t insn; |
| 2536 | int opcd; |
| 2537 | |
| 2538 | read_inferior_memory (from, (unsigned char *) &insn, 4); |
| 2539 | opcd = (insn >> 26) & 0x3f; |
| 2540 | |
| 2541 | switch (size) |
| 2542 | { |
| 2543 | case 14: |
| 2544 | if (opcd != 16 |
| 2545 | || (rel >= (1 << 15) || rel < -(1 << 15))) |
| 2546 | emit_error = 1; |
| 2547 | insn = (insn & ~0xfffc) | (rel & 0xfffc); |
| 2548 | break; |
| 2549 | case 24: |
| 2550 | if (opcd != 18 |
| 2551 | || (rel >= (1 << 25) || rel < -(1 << 25))) |
| 2552 | emit_error = 1; |
| 2553 | insn = (insn & ~0x3fffffc) | (rel & 0x3fffffc); |
| 2554 | break; |
| 2555 | default: |
| 2556 | emit_error = 1; |
| 2557 | } |
| 2558 | |
| 2559 | if (!emit_error) |
| 2560 | target_write_memory (from, (unsigned char *) &insn, 4); |
| 2561 | } |
| 2562 | |
| 2563 | /* Table of emit ops for 32-bit. */ |
| 2564 | |
| 2565 | static struct emit_ops ppc_emit_ops_impl = |
| 2566 | { |
| 2567 | ppc_emit_prologue, |
| 2568 | ppc_emit_epilogue, |
| 2569 | ppc_emit_add, |
| 2570 | ppc_emit_sub, |
| 2571 | ppc_emit_mul, |
| 2572 | ppc_emit_lsh, |
| 2573 | ppc_emit_rsh_signed, |
| 2574 | ppc_emit_rsh_unsigned, |
| 2575 | ppc_emit_ext, |
| 2576 | ppc_emit_log_not, |
| 2577 | ppc_emit_bit_and, |
| 2578 | ppc_emit_bit_or, |
| 2579 | ppc_emit_bit_xor, |
| 2580 | ppc_emit_bit_not, |
| 2581 | ppc_emit_equal, |
| 2582 | ppc_emit_less_signed, |
| 2583 | ppc_emit_less_unsigned, |
| 2584 | ppc_emit_ref, |
| 2585 | ppc_emit_if_goto, |
| 2586 | ppc_emit_goto, |
| 2587 | ppc_write_goto_address, |
| 2588 | ppc_emit_const, |
| 2589 | ppc_emit_call, |
| 2590 | ppc_emit_reg, |
| 2591 | ppc_emit_pop, |
| 2592 | ppc_emit_stack_flush, |
| 2593 | ppc_emit_zero_ext, |
| 2594 | ppc_emit_swap, |
| 2595 | ppc_emit_stack_adjust, |
| 2596 | ppc_emit_int_call_1, |
| 2597 | ppc_emit_void_call_2, |
| 2598 | ppc_emit_eq_goto, |
| 2599 | ppc_emit_ne_goto, |
| 2600 | ppc_emit_lt_goto, |
| 2601 | ppc_emit_le_goto, |
| 2602 | ppc_emit_gt_goto, |
| 2603 | ppc_emit_ge_goto |
| 2604 | }; |
| 2605 | |
| 2606 | #ifdef __powerpc64__ |
| 2607 | |
| 2608 | /* |
| 2609 | |
| 2610 | Bytecode execution stack frame - 64-bit |
| 2611 | |
| 2612 | | LR save area (SP + 16) |
| 2613 | | CR save area (SP + 8) |
| 2614 | SP' -> +- Back chain (SP + 0) |
| 2615 | | Save r31 for access saved arguments |
| 2616 | | Save r30 for bytecode stack pointer |
| 2617 | | Save r4 for incoming argument *value |
| 2618 | | Save r3 for incoming argument regs |
| 2619 | r30 -> +- Bytecode execution stack |
| 2620 | | |
| 2621 | | 64-byte (8 doublewords) at initial. |
| 2622 | | Expand stack as needed. |
| 2623 | | |
| 2624 | +- |
| 2625 | | Some padding for minimum stack frame. |
| 2626 | | 112 for ELFv1. |
| 2627 | SP +- Back-chain (SP') |
| 2628 | |
| 2629 | initial frame size |
| 2630 | = 112 + (4 * 8) + 64 |
| 2631 | = 208 |
| 2632 | |
| 2633 | r30 is the stack-pointer for bytecode machine. |
| 2634 | It should point to next-empty, so we can use LDU for pop. |
| 2635 | r3 is used for cache of TOP value. |
| 2636 | It was the first argument, pointer to regs. |
| 2637 | r4 is the second argument, pointer to the result. |
| 2638 | We should set *result = TOP after leaving this function. |
| 2639 | |
| 2640 | Note: |
| 2641 | * To restore stack at epilogue |
| 2642 | => sp = r31 |
| 2643 | * To check stack is big enough for bytecode execution. |
| 2644 | => r30 - 8 > SP + 112 |
| 2645 | * To return execution result. |
| 2646 | => 0(r4) = TOP |
| 2647 | |
| 2648 | */ |
| 2649 | |
| 2650 | /* Emit prologue in inferior memory. See above comments. */ |
| 2651 | |
| 2652 | static void |
| 2653 | ppc64v1_emit_prologue (void) |
| 2654 | { |
| 2655 | /* On ELFv1, function pointers really point to function descriptor, |
| 2656 | so emit one here. We don't care about contents of words 1 and 2, |
| 2657 | so let them just overlap out code. */ |
| 2658 | uint64_t opd = current_insn_ptr + 8; |
| 2659 | uint32_t buf[2]; |
| 2660 | |
| 2661 | /* Mind the strict aliasing rules. */ |
| 2662 | memcpy (buf, &opd, sizeof buf); |
| 2663 | emit_insns(buf, 2); |
| 2664 | EMIT_ASM (/* Save return address. */ |
| 2665 | "mflr 0 \n" |
| 2666 | "std 0, 16(1) \n" |
| 2667 | /* Save r30 and incoming arguments. */ |
| 2668 | "std 31, -8(1) \n" |
| 2669 | "std 30, -16(1) \n" |
| 2670 | "std 4, -24(1) \n" |
| 2671 | "std 3, -32(1) \n" |
| 2672 | /* Point r31 to current r1 for access arguments. */ |
| 2673 | "mr 31, 1 \n" |
| 2674 | /* Adjust SP. 208 is the initial frame size. */ |
| 2675 | "stdu 1, -208(1) \n" |
| 2676 | /* Set r30 to pointing stack-top. */ |
| 2677 | "addi 30, 1, 168 \n" |
| 2678 | /* Initial r3/TOP to 0. */ |
| 2679 | "li 3, 0 \n"); |
| 2680 | } |
| 2681 | |
| 2682 | /* Emit prologue in inferior memory. See above comments. */ |
| 2683 | |
| 2684 | static void |
| 2685 | ppc64v2_emit_prologue (void) |
| 2686 | { |
| 2687 | EMIT_ASM (/* Save return address. */ |
| 2688 | "mflr 0 \n" |
| 2689 | "std 0, 16(1) \n" |
| 2690 | /* Save r30 and incoming arguments. */ |
| 2691 | "std 31, -8(1) \n" |
| 2692 | "std 30, -16(1) \n" |
| 2693 | "std 4, -24(1) \n" |
| 2694 | "std 3, -32(1) \n" |
| 2695 | /* Point r31 to current r1 for access arguments. */ |
| 2696 | "mr 31, 1 \n" |
| 2697 | /* Adjust SP. 208 is the initial frame size. */ |
| 2698 | "stdu 1, -208(1) \n" |
| 2699 | /* Set r30 to pointing stack-top. */ |
| 2700 | "addi 30, 1, 168 \n" |
| 2701 | /* Initial r3/TOP to 0. */ |
| 2702 | "li 3, 0 \n"); |
| 2703 | } |
| 2704 | |
| 2705 | /* Emit epilogue in inferior memory. See above comments. */ |
| 2706 | |
| 2707 | static void |
| 2708 | ppc64_emit_epilogue (void) |
| 2709 | { |
| 2710 | EMIT_ASM (/* Restore SP. */ |
| 2711 | "ld 1, 0(1) \n" |
| 2712 | /* *result = TOP */ |
| 2713 | "ld 4, -24(1) \n" |
| 2714 | "std 3, 0(4) \n" |
| 2715 | /* Restore registers. */ |
| 2716 | "ld 31, -8(1) \n" |
| 2717 | "ld 30, -16(1) \n" |
| 2718 | /* Restore LR. */ |
| 2719 | "ld 0, 16(1) \n" |
| 2720 | /* Return 0 for no-error. */ |
| 2721 | "li 3, 0 \n" |
| 2722 | "mtlr 0 \n" |
| 2723 | "blr \n"); |
| 2724 | } |
| 2725 | |
| 2726 | /* TOP = stack[--sp] + TOP */ |
| 2727 | |
| 2728 | static void |
| 2729 | ppc64_emit_add (void) |
| 2730 | { |
| 2731 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2732 | "add 3, 4, 3 \n"); |
| 2733 | } |
| 2734 | |
| 2735 | /* TOP = stack[--sp] - TOP */ |
| 2736 | |
| 2737 | static void |
| 2738 | ppc64_emit_sub (void) |
| 2739 | { |
| 2740 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2741 | "sub 3, 4, 3 \n"); |
| 2742 | } |
| 2743 | |
| 2744 | /* TOP = stack[--sp] * TOP */ |
| 2745 | |
| 2746 | static void |
| 2747 | ppc64_emit_mul (void) |
| 2748 | { |
| 2749 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2750 | "mulld 3, 4, 3 \n"); |
| 2751 | } |
| 2752 | |
| 2753 | /* TOP = stack[--sp] << TOP */ |
| 2754 | |
| 2755 | static void |
| 2756 | ppc64_emit_lsh (void) |
| 2757 | { |
| 2758 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2759 | "sld 3, 4, 3 \n"); |
| 2760 | } |
| 2761 | |
| 2762 | /* Top = stack[--sp] >> TOP |
| 2763 | (Arithmetic shift right) */ |
| 2764 | |
| 2765 | static void |
| 2766 | ppc64_emit_rsh_signed (void) |
| 2767 | { |
| 2768 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2769 | "srad 3, 4, 3 \n"); |
| 2770 | } |
| 2771 | |
| 2772 | /* Top = stack[--sp] >> TOP |
| 2773 | (Logical shift right) */ |
| 2774 | |
| 2775 | static void |
| 2776 | ppc64_emit_rsh_unsigned (void) |
| 2777 | { |
| 2778 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2779 | "srd 3, 4, 3 \n"); |
| 2780 | } |
| 2781 | |
| 2782 | /* Emit code for signed-extension specified by ARG. */ |
| 2783 | |
| 2784 | static void |
| 2785 | ppc64_emit_ext (int arg) |
| 2786 | { |
| 2787 | switch (arg) |
| 2788 | { |
| 2789 | case 8: |
| 2790 | EMIT_ASM ("extsb 3, 3"); |
| 2791 | break; |
| 2792 | case 16: |
| 2793 | EMIT_ASM ("extsh 3, 3"); |
| 2794 | break; |
| 2795 | case 32: |
| 2796 | EMIT_ASM ("extsw 3, 3"); |
| 2797 | break; |
| 2798 | default: |
| 2799 | emit_error = 1; |
| 2800 | } |
| 2801 | } |
| 2802 | |
| 2803 | /* Emit code for zero-extension specified by ARG. */ |
| 2804 | |
| 2805 | static void |
| 2806 | ppc64_emit_zero_ext (int arg) |
| 2807 | { |
| 2808 | switch (arg) |
| 2809 | { |
| 2810 | case 8: |
| 2811 | EMIT_ASM ("rldicl 3,3,0,56"); |
| 2812 | break; |
| 2813 | case 16: |
| 2814 | EMIT_ASM ("rldicl 3,3,0,48"); |
| 2815 | break; |
| 2816 | case 32: |
| 2817 | EMIT_ASM ("rldicl 3,3,0,32"); |
| 2818 | break; |
| 2819 | default: |
| 2820 | emit_error = 1; |
| 2821 | } |
| 2822 | } |
| 2823 | |
| 2824 | /* TOP = !TOP |
| 2825 | i.e., TOP = (TOP == 0) ? 1 : 0; */ |
| 2826 | |
| 2827 | static void |
| 2828 | ppc64_emit_log_not (void) |
| 2829 | { |
| 2830 | EMIT_ASM ("cntlzd 3, 3 \n" |
| 2831 | "srdi 3, 3, 6 \n"); |
| 2832 | } |
| 2833 | |
| 2834 | /* TOP = stack[--sp] & TOP */ |
| 2835 | |
| 2836 | static void |
| 2837 | ppc64_emit_bit_and (void) |
| 2838 | { |
| 2839 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2840 | "and 3, 4, 3 \n"); |
| 2841 | } |
| 2842 | |
| 2843 | /* TOP = stack[--sp] | TOP */ |
| 2844 | |
| 2845 | static void |
| 2846 | ppc64_emit_bit_or (void) |
| 2847 | { |
| 2848 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2849 | "or 3, 4, 3 \n"); |
| 2850 | } |
| 2851 | |
| 2852 | /* TOP = stack[--sp] ^ TOP */ |
| 2853 | |
| 2854 | static void |
| 2855 | ppc64_emit_bit_xor (void) |
| 2856 | { |
| 2857 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2858 | "xor 3, 4, 3 \n"); |
| 2859 | } |
| 2860 | |
| 2861 | /* TOP = ~TOP |
| 2862 | i.e., TOP = ~(TOP | TOP) */ |
| 2863 | |
| 2864 | static void |
| 2865 | ppc64_emit_bit_not (void) |
| 2866 | { |
| 2867 | EMIT_ASM ("nor 3, 3, 3 \n"); |
| 2868 | } |
| 2869 | |
| 2870 | /* TOP = stack[--sp] == TOP */ |
| 2871 | |
| 2872 | static void |
| 2873 | ppc64_emit_equal (void) |
| 2874 | { |
| 2875 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2876 | "xor 3, 3, 4 \n" |
| 2877 | "cntlzd 3, 3 \n" |
| 2878 | "srdi 3, 3, 6 \n"); |
| 2879 | } |
| 2880 | |
| 2881 | /* TOP = stack[--sp] < TOP |
| 2882 | (Signed comparison) */ |
| 2883 | |
| 2884 | static void |
| 2885 | ppc64_emit_less_signed (void) |
| 2886 | { |
| 2887 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2888 | "cmpd 7, 4, 3 \n" |
| 2889 | "mfcr 3 \n" |
| 2890 | "rlwinm 3, 3, 29, 31, 31 \n"); |
| 2891 | } |
| 2892 | |
| 2893 | /* TOP = stack[--sp] < TOP |
| 2894 | (Unsigned comparison) */ |
| 2895 | |
| 2896 | static void |
| 2897 | ppc64_emit_less_unsigned (void) |
| 2898 | { |
| 2899 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 2900 | "cmpld 7, 4, 3 \n" |
| 2901 | "mfcr 3 \n" |
| 2902 | "rlwinm 3, 3, 29, 31, 31 \n"); |
| 2903 | } |
| 2904 | |
| 2905 | /* Access the memory address in TOP in size of SIZE. |
| 2906 | Zero-extend the read value. */ |
| 2907 | |
| 2908 | static void |
| 2909 | ppc64_emit_ref (int size) |
| 2910 | { |
| 2911 | switch (size) |
| 2912 | { |
| 2913 | case 1: |
| 2914 | EMIT_ASM ("lbz 3, 0(3)"); |
| 2915 | break; |
| 2916 | case 2: |
| 2917 | EMIT_ASM ("lhz 3, 0(3)"); |
| 2918 | break; |
| 2919 | case 4: |
| 2920 | EMIT_ASM ("lwz 3, 0(3)"); |
| 2921 | break; |
| 2922 | case 8: |
| 2923 | EMIT_ASM ("ld 3, 0(3)"); |
| 2924 | break; |
| 2925 | } |
| 2926 | } |
| 2927 | |
| 2928 | /* TOP = NUM */ |
| 2929 | |
| 2930 | static void |
| 2931 | ppc64_emit_const (LONGEST num) |
| 2932 | { |
| 2933 | uint32_t buf[5]; |
| 2934 | uint32_t *p = buf; |
| 2935 | |
| 2936 | p += gen_limm (p, 3, num, 1); |
| 2937 | |
| 2938 | emit_insns (buf, p - buf); |
| 2939 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2940 | } |
| 2941 | |
| 2942 | /* Set TOP to the value of register REG by calling get_raw_reg function |
| 2943 | with two argument, collected buffer and register number. */ |
| 2944 | |
| 2945 | static void |
| 2946 | ppc64v1_emit_reg (int reg) |
| 2947 | { |
| 2948 | uint32_t buf[15]; |
| 2949 | uint32_t *p = buf; |
| 2950 | |
| 2951 | /* fctx->regs is passed in r3 and then saved in 176(1). */ |
| 2952 | p += GEN_LD (p, 3, 31, -32); |
| 2953 | p += GEN_LI (p, 4, reg); |
| 2954 | p += GEN_STD (p, 2, 1, 40); /* Save TOC. */ |
| 2955 | p += gen_call (p, get_raw_reg_func_addr (), 1, 1); |
| 2956 | p += GEN_LD (p, 2, 1, 40); /* Restore TOC. */ |
| 2957 | |
| 2958 | emit_insns (buf, p - buf); |
| 2959 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2960 | } |
| 2961 | |
| 2962 | /* Likewise, for ELFv2. */ |
| 2963 | |
| 2964 | static void |
| 2965 | ppc64v2_emit_reg (int reg) |
| 2966 | { |
| 2967 | uint32_t buf[12]; |
| 2968 | uint32_t *p = buf; |
| 2969 | |
| 2970 | /* fctx->regs is passed in r3 and then saved in 176(1). */ |
| 2971 | p += GEN_LD (p, 3, 31, -32); |
| 2972 | p += GEN_LI (p, 4, reg); |
| 2973 | p += GEN_STD (p, 2, 1, 24); /* Save TOC. */ |
| 2974 | p += gen_call (p, get_raw_reg_func_addr (), 1, 0); |
| 2975 | p += GEN_LD (p, 2, 1, 24); /* Restore TOC. */ |
| 2976 | |
| 2977 | emit_insns (buf, p - buf); |
| 2978 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 2979 | } |
| 2980 | |
| 2981 | /* TOP = stack[--sp] */ |
| 2982 | |
| 2983 | static void |
| 2984 | ppc64_emit_pop (void) |
| 2985 | { |
| 2986 | EMIT_ASM ("ldu 3, 8(30)"); |
| 2987 | } |
| 2988 | |
| 2989 | /* stack[sp++] = TOP |
| 2990 | |
| 2991 | Because we may use up bytecode stack, expand 8 doublewords more |
| 2992 | if needed. */ |
| 2993 | |
| 2994 | static void |
| 2995 | ppc64_emit_stack_flush (void) |
| 2996 | { |
| 2997 | /* Make sure bytecode stack is big enough before push. |
| 2998 | Otherwise, expand 64-byte more. */ |
| 2999 | |
| 3000 | EMIT_ASM (" std 3, 0(30) \n" |
| 3001 | " addi 4, 30, -(112 + 8) \n" |
| 3002 | " cmpd 7, 4, 1 \n" |
| 3003 | " bgt 7, 1f \n" |
| 3004 | " stdu 31, -64(1) \n" |
| 3005 | "1:addi 30, 30, -8 \n"); |
| 3006 | } |
| 3007 | |
| 3008 | /* Swap TOP and stack[sp-1] */ |
| 3009 | |
| 3010 | static void |
| 3011 | ppc64_emit_swap (void) |
| 3012 | { |
| 3013 | EMIT_ASM ("ld 4, 8(30) \n" |
| 3014 | "std 3, 8(30) \n" |
| 3015 | "mr 3, 4 \n"); |
| 3016 | } |
| 3017 | |
| 3018 | /* Call function FN - ELFv1. */ |
| 3019 | |
| 3020 | static void |
| 3021 | ppc64v1_emit_call (CORE_ADDR fn) |
| 3022 | { |
| 3023 | uint32_t buf[13]; |
| 3024 | uint32_t *p = buf; |
| 3025 | |
| 3026 | p += GEN_STD (p, 2, 1, 40); /* Save TOC. */ |
| 3027 | p += gen_call (p, fn, 1, 1); |
| 3028 | p += GEN_LD (p, 2, 1, 40); /* Restore TOC. */ |
| 3029 | |
| 3030 | emit_insns (buf, p - buf); |
| 3031 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 3032 | } |
| 3033 | |
| 3034 | /* Call function FN - ELFv2. */ |
| 3035 | |
| 3036 | static void |
| 3037 | ppc64v2_emit_call (CORE_ADDR fn) |
| 3038 | { |
| 3039 | uint32_t buf[10]; |
| 3040 | uint32_t *p = buf; |
| 3041 | |
| 3042 | p += GEN_STD (p, 2, 1, 24); /* Save TOC. */ |
| 3043 | p += gen_call (p, fn, 1, 0); |
| 3044 | p += GEN_LD (p, 2, 1, 24); /* Restore TOC. */ |
| 3045 | |
| 3046 | emit_insns (buf, p - buf); |
| 3047 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 3048 | } |
| 3049 | |
| 3050 | /* FN's prototype is `LONGEST(*fn)(int)'. |
| 3051 | TOP = fn (arg1) |
| 3052 | */ |
| 3053 | |
| 3054 | static void |
| 3055 | ppc64v1_emit_int_call_1 (CORE_ADDR fn, int arg1) |
| 3056 | { |
| 3057 | uint32_t buf[13]; |
| 3058 | uint32_t *p = buf; |
| 3059 | |
| 3060 | /* Setup argument. arg1 is a 16-bit value. */ |
| 3061 | p += gen_limm (p, 3, arg1, 1); |
| 3062 | p += GEN_STD (p, 2, 1, 40); /* Save TOC. */ |
| 3063 | p += gen_call (p, fn, 1, 1); |
| 3064 | p += GEN_LD (p, 2, 1, 40); /* Restore TOC. */ |
| 3065 | |
| 3066 | emit_insns (buf, p - buf); |
| 3067 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 3068 | } |
| 3069 | |
| 3070 | /* Likewise for ELFv2. */ |
| 3071 | |
| 3072 | static void |
| 3073 | ppc64v2_emit_int_call_1 (CORE_ADDR fn, int arg1) |
| 3074 | { |
| 3075 | uint32_t buf[10]; |
| 3076 | uint32_t *p = buf; |
| 3077 | |
| 3078 | /* Setup argument. arg1 is a 16-bit value. */ |
| 3079 | p += gen_limm (p, 3, arg1, 1); |
| 3080 | p += GEN_STD (p, 2, 1, 24); /* Save TOC. */ |
| 3081 | p += gen_call (p, fn, 1, 0); |
| 3082 | p += GEN_LD (p, 2, 1, 24); /* Restore TOC. */ |
| 3083 | |
| 3084 | emit_insns (buf, p - buf); |
| 3085 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 3086 | } |
| 3087 | |
| 3088 | /* FN's prototype is `void(*fn)(int,LONGEST)'. |
| 3089 | fn (arg1, TOP) |
| 3090 | |
| 3091 | TOP should be preserved/restored before/after the call. */ |
| 3092 | |
| 3093 | static void |
| 3094 | ppc64v1_emit_void_call_2 (CORE_ADDR fn, int arg1) |
| 3095 | { |
| 3096 | uint32_t buf[17]; |
| 3097 | uint32_t *p = buf; |
| 3098 | |
| 3099 | /* Save TOP. 0(30) is next-empty. */ |
| 3100 | p += GEN_STD (p, 3, 30, 0); |
| 3101 | |
| 3102 | /* Setup argument. arg1 is a 16-bit value. */ |
| 3103 | p += GEN_MR (p, 4, 3); /* mr r4, r3 */ |
| 3104 | p += gen_limm (p, 3, arg1, 1); |
| 3105 | p += GEN_STD (p, 2, 1, 40); /* Save TOC. */ |
| 3106 | p += gen_call (p, fn, 1, 1); |
| 3107 | p += GEN_LD (p, 2, 1, 40); /* Restore TOC. */ |
| 3108 | |
| 3109 | /* Restore TOP */ |
| 3110 | p += GEN_LD (p, 3, 30, 0); |
| 3111 | |
| 3112 | emit_insns (buf, p - buf); |
| 3113 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 3114 | } |
| 3115 | |
| 3116 | /* Likewise for ELFv2. */ |
| 3117 | |
| 3118 | static void |
| 3119 | ppc64v2_emit_void_call_2 (CORE_ADDR fn, int arg1) |
| 3120 | { |
| 3121 | uint32_t buf[14]; |
| 3122 | uint32_t *p = buf; |
| 3123 | |
| 3124 | /* Save TOP. 0(30) is next-empty. */ |
| 3125 | p += GEN_STD (p, 3, 30, 0); |
| 3126 | |
| 3127 | /* Setup argument. arg1 is a 16-bit value. */ |
| 3128 | p += GEN_MR (p, 4, 3); /* mr r4, r3 */ |
| 3129 | p += gen_limm (p, 3, arg1, 1); |
| 3130 | p += GEN_STD (p, 2, 1, 24); /* Save TOC. */ |
| 3131 | p += gen_call (p, fn, 1, 0); |
| 3132 | p += GEN_LD (p, 2, 1, 24); /* Restore TOC. */ |
| 3133 | |
| 3134 | /* Restore TOP */ |
| 3135 | p += GEN_LD (p, 3, 30, 0); |
| 3136 | |
| 3137 | emit_insns (buf, p - buf); |
| 3138 | gdb_assert ((p - buf) <= (sizeof (buf) / sizeof (*buf))); |
| 3139 | } |
| 3140 | |
| 3141 | /* If TOP is true, goto somewhere. Otherwise, just fall-through. */ |
| 3142 | |
| 3143 | static void |
| 3144 | ppc64_emit_if_goto (int *offset_p, int *size_p) |
| 3145 | { |
| 3146 | EMIT_ASM ("cmpdi 7, 3, 0 \n" |
| 3147 | "ldu 3, 8(30) \n" |
| 3148 | "1:bne 7, 1b \n"); |
| 3149 | |
| 3150 | if (offset_p) |
| 3151 | *offset_p = 8; |
| 3152 | if (size_p) |
| 3153 | *size_p = 14; |
| 3154 | } |
| 3155 | |
| 3156 | /* Goto if stack[--sp] == TOP */ |
| 3157 | |
| 3158 | static void |
| 3159 | ppc64_emit_eq_goto (int *offset_p, int *size_p) |
| 3160 | { |
| 3161 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 3162 | "cmpd 7, 4, 3 \n" |
| 3163 | "ldu 3, 8(30) \n" |
| 3164 | "1:beq 7, 1b \n"); |
| 3165 | |
| 3166 | if (offset_p) |
| 3167 | *offset_p = 12; |
| 3168 | if (size_p) |
| 3169 | *size_p = 14; |
| 3170 | } |
| 3171 | |
| 3172 | /* Goto if stack[--sp] != TOP */ |
| 3173 | |
| 3174 | static void |
| 3175 | ppc64_emit_ne_goto (int *offset_p, int *size_p) |
| 3176 | { |
| 3177 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 3178 | "cmpd 7, 4, 3 \n" |
| 3179 | "ldu 3, 8(30) \n" |
| 3180 | "1:bne 7, 1b \n"); |
| 3181 | |
| 3182 | if (offset_p) |
| 3183 | *offset_p = 12; |
| 3184 | if (size_p) |
| 3185 | *size_p = 14; |
| 3186 | } |
| 3187 | |
| 3188 | /* Goto if stack[--sp] < TOP */ |
| 3189 | |
| 3190 | static void |
| 3191 | ppc64_emit_lt_goto (int *offset_p, int *size_p) |
| 3192 | { |
| 3193 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 3194 | "cmpd 7, 4, 3 \n" |
| 3195 | "ldu 3, 8(30) \n" |
| 3196 | "1:blt 7, 1b \n"); |
| 3197 | |
| 3198 | if (offset_p) |
| 3199 | *offset_p = 12; |
| 3200 | if (size_p) |
| 3201 | *size_p = 14; |
| 3202 | } |
| 3203 | |
| 3204 | /* Goto if stack[--sp] <= TOP */ |
| 3205 | |
| 3206 | static void |
| 3207 | ppc64_emit_le_goto (int *offset_p, int *size_p) |
| 3208 | { |
| 3209 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 3210 | "cmpd 7, 4, 3 \n" |
| 3211 | "ldu 3, 8(30) \n" |
| 3212 | "1:ble 7, 1b \n"); |
| 3213 | |
| 3214 | if (offset_p) |
| 3215 | *offset_p = 12; |
| 3216 | if (size_p) |
| 3217 | *size_p = 14; |
| 3218 | } |
| 3219 | |
| 3220 | /* Goto if stack[--sp] > TOP */ |
| 3221 | |
| 3222 | static void |
| 3223 | ppc64_emit_gt_goto (int *offset_p, int *size_p) |
| 3224 | { |
| 3225 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 3226 | "cmpd 7, 4, 3 \n" |
| 3227 | "ldu 3, 8(30) \n" |
| 3228 | "1:bgt 7, 1b \n"); |
| 3229 | |
| 3230 | if (offset_p) |
| 3231 | *offset_p = 12; |
| 3232 | if (size_p) |
| 3233 | *size_p = 14; |
| 3234 | } |
| 3235 | |
| 3236 | /* Goto if stack[--sp] >= TOP */ |
| 3237 | |
| 3238 | static void |
| 3239 | ppc64_emit_ge_goto (int *offset_p, int *size_p) |
| 3240 | { |
| 3241 | EMIT_ASM ("ldu 4, 8(30) \n" |
| 3242 | "cmpd 7, 4, 3 \n" |
| 3243 | "ldu 3, 8(30) \n" |
| 3244 | "1:bge 7, 1b \n"); |
| 3245 | |
| 3246 | if (offset_p) |
| 3247 | *offset_p = 12; |
| 3248 | if (size_p) |
| 3249 | *size_p = 14; |
| 3250 | } |
| 3251 | |
| 3252 | /* Table of emit ops for 64-bit ELFv1. */ |
| 3253 | |
| 3254 | static struct emit_ops ppc64v1_emit_ops_impl = |
| 3255 | { |
| 3256 | ppc64v1_emit_prologue, |
| 3257 | ppc64_emit_epilogue, |
| 3258 | ppc64_emit_add, |
| 3259 | ppc64_emit_sub, |
| 3260 | ppc64_emit_mul, |
| 3261 | ppc64_emit_lsh, |
| 3262 | ppc64_emit_rsh_signed, |
| 3263 | ppc64_emit_rsh_unsigned, |
| 3264 | ppc64_emit_ext, |
| 3265 | ppc64_emit_log_not, |
| 3266 | ppc64_emit_bit_and, |
| 3267 | ppc64_emit_bit_or, |
| 3268 | ppc64_emit_bit_xor, |
| 3269 | ppc64_emit_bit_not, |
| 3270 | ppc64_emit_equal, |
| 3271 | ppc64_emit_less_signed, |
| 3272 | ppc64_emit_less_unsigned, |
| 3273 | ppc64_emit_ref, |
| 3274 | ppc64_emit_if_goto, |
| 3275 | ppc_emit_goto, |
| 3276 | ppc_write_goto_address, |
| 3277 | ppc64_emit_const, |
| 3278 | ppc64v1_emit_call, |
| 3279 | ppc64v1_emit_reg, |
| 3280 | ppc64_emit_pop, |
| 3281 | ppc64_emit_stack_flush, |
| 3282 | ppc64_emit_zero_ext, |
| 3283 | ppc64_emit_swap, |
| 3284 | ppc_emit_stack_adjust, |
| 3285 | ppc64v1_emit_int_call_1, |
| 3286 | ppc64v1_emit_void_call_2, |
| 3287 | ppc64_emit_eq_goto, |
| 3288 | ppc64_emit_ne_goto, |
| 3289 | ppc64_emit_lt_goto, |
| 3290 | ppc64_emit_le_goto, |
| 3291 | ppc64_emit_gt_goto, |
| 3292 | ppc64_emit_ge_goto |
| 3293 | }; |
| 3294 | |
| 3295 | /* Table of emit ops for 64-bit ELFv2. */ |
| 3296 | |
| 3297 | static struct emit_ops ppc64v2_emit_ops_impl = |
| 3298 | { |
| 3299 | ppc64v2_emit_prologue, |
| 3300 | ppc64_emit_epilogue, |
| 3301 | ppc64_emit_add, |
| 3302 | ppc64_emit_sub, |
| 3303 | ppc64_emit_mul, |
| 3304 | ppc64_emit_lsh, |
| 3305 | ppc64_emit_rsh_signed, |
| 3306 | ppc64_emit_rsh_unsigned, |
| 3307 | ppc64_emit_ext, |
| 3308 | ppc64_emit_log_not, |
| 3309 | ppc64_emit_bit_and, |
| 3310 | ppc64_emit_bit_or, |
| 3311 | ppc64_emit_bit_xor, |
| 3312 | ppc64_emit_bit_not, |
| 3313 | ppc64_emit_equal, |
| 3314 | ppc64_emit_less_signed, |
| 3315 | ppc64_emit_less_unsigned, |
| 3316 | ppc64_emit_ref, |
| 3317 | ppc64_emit_if_goto, |
| 3318 | ppc_emit_goto, |
| 3319 | ppc_write_goto_address, |
| 3320 | ppc64_emit_const, |
| 3321 | ppc64v2_emit_call, |
| 3322 | ppc64v2_emit_reg, |
| 3323 | ppc64_emit_pop, |
| 3324 | ppc64_emit_stack_flush, |
| 3325 | ppc64_emit_zero_ext, |
| 3326 | ppc64_emit_swap, |
| 3327 | ppc_emit_stack_adjust, |
| 3328 | ppc64v2_emit_int_call_1, |
| 3329 | ppc64v2_emit_void_call_2, |
| 3330 | ppc64_emit_eq_goto, |
| 3331 | ppc64_emit_ne_goto, |
| 3332 | ppc64_emit_lt_goto, |
| 3333 | ppc64_emit_le_goto, |
| 3334 | ppc64_emit_gt_goto, |
| 3335 | ppc64_emit_ge_goto |
| 3336 | }; |
| 3337 | |
| 3338 | #endif |
| 3339 | |
| 3340 | /* Implementation of linux_target_ops method "emit_ops". */ |
| 3341 | |
| 3342 | static struct emit_ops * |
| 3343 | ppc_emit_ops (void) |
| 3344 | { |
| 3345 | #ifdef __powerpc64__ |
| 3346 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 3347 | |
| 3348 | if (register_size (regcache->tdesc, 0) == 8) |
| 3349 | { |
| 3350 | if (is_elfv2_inferior ()) |
| 3351 | return &ppc64v2_emit_ops_impl; |
| 3352 | else |
| 3353 | return &ppc64v1_emit_ops_impl; |
| 3354 | } |
| 3355 | #endif |
| 3356 | return &ppc_emit_ops_impl; |
| 3357 | } |
| 3358 | |
| 3359 | /* Implementation of linux_target_ops method "get_ipa_tdesc_idx". */ |
| 3360 | |
| 3361 | static int |
| 3362 | ppc_get_ipa_tdesc_idx (void) |
| 3363 | { |
| 3364 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
| 3365 | const struct target_desc *tdesc = regcache->tdesc; |
| 3366 | |
| 3367 | #ifdef __powerpc64__ |
| 3368 | if (tdesc == tdesc_powerpc_64l) |
| 3369 | return PPC_TDESC_BASE; |
| 3370 | if (tdesc == tdesc_powerpc_altivec64l) |
| 3371 | return PPC_TDESC_ALTIVEC; |
| 3372 | if (tdesc == tdesc_powerpc_vsx64l) |
| 3373 | return PPC_TDESC_VSX; |
| 3374 | if (tdesc == tdesc_powerpc_isa205_64l) |
| 3375 | return PPC_TDESC_ISA205; |
| 3376 | if (tdesc == tdesc_powerpc_isa205_altivec64l) |
| 3377 | return PPC_TDESC_ISA205_ALTIVEC; |
| 3378 | if (tdesc == tdesc_powerpc_isa205_vsx64l) |
| 3379 | return PPC_TDESC_ISA205_VSX; |
| 3380 | if (tdesc == tdesc_powerpc_isa205_ppr_dscr_vsx64l) |
| 3381 | return PPC_TDESC_ISA205_PPR_DSCR_VSX; |
| 3382 | if (tdesc == tdesc_powerpc_isa207_vsx64l) |
| 3383 | return PPC_TDESC_ISA207_VSX; |
| 3384 | if (tdesc == tdesc_powerpc_isa207_htm_vsx64l) |
| 3385 | return PPC_TDESC_ISA207_HTM_VSX; |
| 3386 | #endif |
| 3387 | |
| 3388 | if (tdesc == tdesc_powerpc_32l) |
| 3389 | return PPC_TDESC_BASE; |
| 3390 | if (tdesc == tdesc_powerpc_altivec32l) |
| 3391 | return PPC_TDESC_ALTIVEC; |
| 3392 | if (tdesc == tdesc_powerpc_vsx32l) |
| 3393 | return PPC_TDESC_VSX; |
| 3394 | if (tdesc == tdesc_powerpc_isa205_32l) |
| 3395 | return PPC_TDESC_ISA205; |
| 3396 | if (tdesc == tdesc_powerpc_isa205_altivec32l) |
| 3397 | return PPC_TDESC_ISA205_ALTIVEC; |
| 3398 | if (tdesc == tdesc_powerpc_isa205_vsx32l) |
| 3399 | return PPC_TDESC_ISA205_VSX; |
| 3400 | if (tdesc == tdesc_powerpc_isa205_ppr_dscr_vsx32l) |
| 3401 | return PPC_TDESC_ISA205_PPR_DSCR_VSX; |
| 3402 | if (tdesc == tdesc_powerpc_isa207_vsx32l) |
| 3403 | return PPC_TDESC_ISA207_VSX; |
| 3404 | if (tdesc == tdesc_powerpc_isa207_htm_vsx32l) |
| 3405 | return PPC_TDESC_ISA207_HTM_VSX; |
| 3406 | if (tdesc == tdesc_powerpc_e500l) |
| 3407 | return PPC_TDESC_E500; |
| 3408 | |
| 3409 | return 0; |
| 3410 | } |
| 3411 | |
| 3412 | struct linux_target_ops the_low_target = { |
| 3413 | ppc_insert_point, |
| 3414 | ppc_remove_point, |
| 3415 | NULL, |
| 3416 | NULL, |
| 3417 | ppc_collect_ptrace_register, |
| 3418 | ppc_supply_ptrace_register, |
| 3419 | NULL, /* siginfo_fixup */ |
| 3420 | NULL, /* new_process */ |
| 3421 | NULL, /* delete_process */ |
| 3422 | NULL, /* new_thread */ |
| 3423 | NULL, /* delete_thread */ |
| 3424 | NULL, /* new_fork */ |
| 3425 | NULL, /* prepare_to_resume */ |
| 3426 | NULL, /* process_qsupported */ |
| 3427 | ppc_supports_tracepoints, |
| 3428 | ppc_get_thread_area, |
| 3429 | ppc_install_fast_tracepoint_jump_pad, |
| 3430 | ppc_emit_ops, |
| 3431 | ppc_get_min_fast_tracepoint_insn_len, |
| 3432 | NULL, /* supports_range_stepping */ |
| 3433 | ppc_supports_hardware_single_step, |
| 3434 | NULL, /* get_syscall_trapinfo */ |
| 3435 | ppc_get_ipa_tdesc_idx, |
| 3436 | }; |
| 3437 | |
| 3438 | /* The linux target ops object. */ |
| 3439 | |
| 3440 | linux_process_target *the_linux_target = &the_ppc_target; |
| 3441 | |
| 3442 | void |
| 3443 | initialize_low_arch (void) |
| 3444 | { |
| 3445 | /* Initialize the Linux target descriptions. */ |
| 3446 | |
| 3447 | init_registers_powerpc_32l (); |
| 3448 | init_registers_powerpc_altivec32l (); |
| 3449 | init_registers_powerpc_vsx32l (); |
| 3450 | init_registers_powerpc_isa205_32l (); |
| 3451 | init_registers_powerpc_isa205_altivec32l (); |
| 3452 | init_registers_powerpc_isa205_vsx32l (); |
| 3453 | init_registers_powerpc_isa205_ppr_dscr_vsx32l (); |
| 3454 | init_registers_powerpc_isa207_vsx32l (); |
| 3455 | init_registers_powerpc_isa207_htm_vsx32l (); |
| 3456 | init_registers_powerpc_e500l (); |
| 3457 | #if __powerpc64__ |
| 3458 | init_registers_powerpc_64l (); |
| 3459 | init_registers_powerpc_altivec64l (); |
| 3460 | init_registers_powerpc_vsx64l (); |
| 3461 | init_registers_powerpc_isa205_64l (); |
| 3462 | init_registers_powerpc_isa205_altivec64l (); |
| 3463 | init_registers_powerpc_isa205_vsx64l (); |
| 3464 | init_registers_powerpc_isa205_ppr_dscr_vsx64l (); |
| 3465 | init_registers_powerpc_isa207_vsx64l (); |
| 3466 | init_registers_powerpc_isa207_htm_vsx64l (); |
| 3467 | #endif |
| 3468 | |
| 3469 | initialize_regsets_info (&ppc_regsets_info); |
| 3470 | } |