| 1 | /* Target-dependent code for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2019 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 "defs.h" |
| 21 | #include "frame.h" |
| 22 | #include "inferior.h" |
| 23 | #include "symtab.h" |
| 24 | #include "target.h" |
| 25 | #include "gdbcore.h" |
| 26 | #include "gdbcmd.h" |
| 27 | #include "symfile.h" |
| 28 | #include "objfiles.h" |
| 29 | #include "regcache.h" |
| 30 | #include "value.h" |
| 31 | #include "osabi.h" |
| 32 | #include "regset.h" |
| 33 | #include "solib-svr4.h" |
| 34 | #include "solib.h" |
| 35 | #include "solist.h" |
| 36 | #include "ppc-tdep.h" |
| 37 | #include "ppc64-tdep.h" |
| 38 | #include "ppc-linux-tdep.h" |
| 39 | #include "arch/ppc-linux-common.h" |
| 40 | #include "arch/ppc-linux-tdesc.h" |
| 41 | #include "glibc-tdep.h" |
| 42 | #include "trad-frame.h" |
| 43 | #include "frame-unwind.h" |
| 44 | #include "tramp-frame.h" |
| 45 | #include "observable.h" |
| 46 | #include "auxv.h" |
| 47 | #include "elf/common.h" |
| 48 | #include "elf/ppc64.h" |
| 49 | #include "arch-utils.h" |
| 50 | #include "xml-syscall.h" |
| 51 | #include "linux-tdep.h" |
| 52 | #include "linux-record.h" |
| 53 | #include "record-full.h" |
| 54 | #include "infrun.h" |
| 55 | |
| 56 | #include "stap-probe.h" |
| 57 | #include "ax.h" |
| 58 | #include "ax-gdb.h" |
| 59 | #include "cli/cli-utils.h" |
| 60 | #include "parser-defs.h" |
| 61 | #include "user-regs.h" |
| 62 | #include <ctype.h> |
| 63 | #include "elf-bfd.h" |
| 64 | |
| 65 | #include "features/rs6000/powerpc-32l.c" |
| 66 | #include "features/rs6000/powerpc-altivec32l.c" |
| 67 | #include "features/rs6000/powerpc-vsx32l.c" |
| 68 | #include "features/rs6000/powerpc-isa205-32l.c" |
| 69 | #include "features/rs6000/powerpc-isa205-altivec32l.c" |
| 70 | #include "features/rs6000/powerpc-isa205-vsx32l.c" |
| 71 | #include "features/rs6000/powerpc-isa205-ppr-dscr-vsx32l.c" |
| 72 | #include "features/rs6000/powerpc-isa207-vsx32l.c" |
| 73 | #include "features/rs6000/powerpc-isa207-htm-vsx32l.c" |
| 74 | #include "features/rs6000/powerpc-64l.c" |
| 75 | #include "features/rs6000/powerpc-altivec64l.c" |
| 76 | #include "features/rs6000/powerpc-vsx64l.c" |
| 77 | #include "features/rs6000/powerpc-isa205-64l.c" |
| 78 | #include "features/rs6000/powerpc-isa205-altivec64l.c" |
| 79 | #include "features/rs6000/powerpc-isa205-vsx64l.c" |
| 80 | #include "features/rs6000/powerpc-isa205-ppr-dscr-vsx64l.c" |
| 81 | #include "features/rs6000/powerpc-isa207-vsx64l.c" |
| 82 | #include "features/rs6000/powerpc-isa207-htm-vsx64l.c" |
| 83 | #include "features/rs6000/powerpc-e500l.c" |
| 84 | |
| 85 | /* Shared library operations for PowerPC-Linux. */ |
| 86 | static struct target_so_ops powerpc_so_ops; |
| 87 | |
| 88 | /* The syscall's XML filename for PPC and PPC64. */ |
| 89 | #define XML_SYSCALL_FILENAME_PPC "syscalls/ppc-linux.xml" |
| 90 | #define XML_SYSCALL_FILENAME_PPC64 "syscalls/ppc64-linux.xml" |
| 91 | |
| 92 | /* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint |
| 93 | in much the same fashion as memory_remove_breakpoint in mem-break.c, |
| 94 | but is careful not to write back the previous contents if the code |
| 95 | in question has changed in between inserting the breakpoint and |
| 96 | removing it. |
| 97 | |
| 98 | Here is the problem that we're trying to solve... |
| 99 | |
| 100 | Once upon a time, before introducing this function to remove |
| 101 | breakpoints from the inferior, setting a breakpoint on a shared |
| 102 | library function prior to running the program would not work |
| 103 | properly. In order to understand the problem, it is first |
| 104 | necessary to understand a little bit about dynamic linking on |
| 105 | this platform. |
| 106 | |
| 107 | A call to a shared library function is accomplished via a bl |
| 108 | (branch-and-link) instruction whose branch target is an entry |
| 109 | in the procedure linkage table (PLT). The PLT in the object |
| 110 | file is uninitialized. To gdb, prior to running the program, the |
| 111 | entries in the PLT are all zeros. |
| 112 | |
| 113 | Once the program starts running, the shared libraries are loaded |
| 114 | and the procedure linkage table is initialized, but the entries in |
| 115 | the table are not (necessarily) resolved. Once a function is |
| 116 | actually called, the code in the PLT is hit and the function is |
| 117 | resolved. In order to better illustrate this, an example is in |
| 118 | order; the following example is from the gdb testsuite. |
| 119 | |
| 120 | We start the program shmain. |
| 121 | |
| 122 | [kev@arroyo testsuite]$ ../gdb gdb.base/shmain |
| 123 | [...] |
| 124 | |
| 125 | We place two breakpoints, one on shr1 and the other on main. |
| 126 | |
| 127 | (gdb) b shr1 |
| 128 | Breakpoint 1 at 0x100409d4 |
| 129 | (gdb) b main |
| 130 | Breakpoint 2 at 0x100006a0: file gdb.base/shmain.c, line 44. |
| 131 | |
| 132 | Examine the instruction (and the immediatly following instruction) |
| 133 | upon which the breakpoint was placed. Note that the PLT entry |
| 134 | for shr1 contains zeros. |
| 135 | |
| 136 | (gdb) x/2i 0x100409d4 |
| 137 | 0x100409d4 <shr1>: .long 0x0 |
| 138 | 0x100409d8 <shr1+4>: .long 0x0 |
| 139 | |
| 140 | Now run 'til main. |
| 141 | |
| 142 | (gdb) r |
| 143 | Starting program: gdb.base/shmain |
| 144 | Breakpoint 1 at 0xffaf790: file gdb.base/shr1.c, line 19. |
| 145 | |
| 146 | Breakpoint 2, main () |
| 147 | at gdb.base/shmain.c:44 |
| 148 | 44 g = 1; |
| 149 | |
| 150 | Examine the PLT again. Note that the loading of the shared |
| 151 | library has initialized the PLT to code which loads a constant |
| 152 | (which I think is an index into the GOT) into r11 and then |
| 153 | branches a short distance to the code which actually does the |
| 154 | resolving. |
| 155 | |
| 156 | (gdb) x/2i 0x100409d4 |
| 157 | 0x100409d4 <shr1>: li r11,4 |
| 158 | 0x100409d8 <shr1+4>: b 0x10040984 <sg+4> |
| 159 | (gdb) c |
| 160 | Continuing. |
| 161 | |
| 162 | Breakpoint 1, shr1 (x=1) |
| 163 | at gdb.base/shr1.c:19 |
| 164 | 19 l = 1; |
| 165 | |
| 166 | Now we've hit the breakpoint at shr1. (The breakpoint was |
| 167 | reset from the PLT entry to the actual shr1 function after the |
| 168 | shared library was loaded.) Note that the PLT entry has been |
| 169 | resolved to contain a branch that takes us directly to shr1. |
| 170 | (The real one, not the PLT entry.) |
| 171 | |
| 172 | (gdb) x/2i 0x100409d4 |
| 173 | 0x100409d4 <shr1>: b 0xffaf76c <shr1> |
| 174 | 0x100409d8 <shr1+4>: b 0x10040984 <sg+4> |
| 175 | |
| 176 | The thing to note here is that the PLT entry for shr1 has been |
| 177 | changed twice. |
| 178 | |
| 179 | Now the problem should be obvious. GDB places a breakpoint (a |
| 180 | trap instruction) on the zero value of the PLT entry for shr1. |
| 181 | Later on, after the shared library had been loaded and the PLT |
| 182 | initialized, GDB gets a signal indicating this fact and attempts |
| 183 | (as it always does when it stops) to remove all the breakpoints. |
| 184 | |
| 185 | The breakpoint removal was causing the former contents (a zero |
| 186 | word) to be written back to the now initialized PLT entry thus |
| 187 | destroying a portion of the initialization that had occurred only a |
| 188 | short time ago. When execution continued, the zero word would be |
| 189 | executed as an instruction an illegal instruction trap was |
| 190 | generated instead. (0 is not a legal instruction.) |
| 191 | |
| 192 | The fix for this problem was fairly straightforward. The function |
| 193 | memory_remove_breakpoint from mem-break.c was copied to this file, |
| 194 | modified slightly, and renamed to ppc_linux_memory_remove_breakpoint. |
| 195 | In tm-linux.h, MEMORY_REMOVE_BREAKPOINT is defined to call this new |
| 196 | function. |
| 197 | |
| 198 | The differences between ppc_linux_memory_remove_breakpoint () and |
| 199 | memory_remove_breakpoint () are minor. All that the former does |
| 200 | that the latter does not is check to make sure that the breakpoint |
| 201 | location actually contains a breakpoint (trap instruction) prior |
| 202 | to attempting to write back the old contents. If it does contain |
| 203 | a trap instruction, we allow the old contents to be written back. |
| 204 | Otherwise, we silently do nothing. |
| 205 | |
| 206 | The big question is whether memory_remove_breakpoint () should be |
| 207 | changed to have the same functionality. The downside is that more |
| 208 | traffic is generated for remote targets since we'll have an extra |
| 209 | fetch of a memory word each time a breakpoint is removed. |
| 210 | |
| 211 | For the time being, we'll leave this self-modifying-code-friendly |
| 212 | version in ppc-linux-tdep.c, but it ought to be migrated somewhere |
| 213 | else in the event that some other platform has similar needs with |
| 214 | regard to removing breakpoints in some potentially self modifying |
| 215 | code. */ |
| 216 | static int |
| 217 | ppc_linux_memory_remove_breakpoint (struct gdbarch *gdbarch, |
| 218 | struct bp_target_info *bp_tgt) |
| 219 | { |
| 220 | CORE_ADDR addr = bp_tgt->reqstd_address; |
| 221 | const unsigned char *bp; |
| 222 | int val; |
| 223 | int bplen; |
| 224 | gdb_byte old_contents[BREAKPOINT_MAX]; |
| 225 | |
| 226 | /* Determine appropriate breakpoint contents and size for this address. */ |
| 227 | bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen); |
| 228 | |
| 229 | /* Make sure we see the memory breakpoints. */ |
| 230 | scoped_restore restore_memory |
| 231 | = make_scoped_restore_show_memory_breakpoints (1); |
| 232 | val = target_read_memory (addr, old_contents, bplen); |
| 233 | |
| 234 | /* If our breakpoint is no longer at the address, this means that the |
| 235 | program modified the code on us, so it is wrong to put back the |
| 236 | old value. */ |
| 237 | if (val == 0 && memcmp (bp, old_contents, bplen) == 0) |
| 238 | val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen); |
| 239 | |
| 240 | return val; |
| 241 | } |
| 242 | |
| 243 | /* For historic reasons, PPC 32 GNU/Linux follows PowerOpen rather |
| 244 | than the 32 bit SYSV R4 ABI structure return convention - all |
| 245 | structures, no matter their size, are put in memory. Vectors, |
| 246 | which were added later, do get returned in a register though. */ |
| 247 | |
| 248 | static enum return_value_convention |
| 249 | ppc_linux_return_value (struct gdbarch *gdbarch, struct value *function, |
| 250 | struct type *valtype, struct regcache *regcache, |
| 251 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 252 | { |
| 253 | if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT |
| 254 | || TYPE_CODE (valtype) == TYPE_CODE_UNION) |
| 255 | && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8) |
| 256 | && TYPE_VECTOR (valtype))) |
| 257 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 258 | else |
| 259 | return ppc_sysv_abi_return_value (gdbarch, function, valtype, regcache, |
| 260 | readbuf, writebuf); |
| 261 | } |
| 262 | |
| 263 | /* PLT stub in an executable. */ |
| 264 | static const struct ppc_insn_pattern powerpc32_plt_stub[] = |
| 265 | { |
| 266 | { 0xffff0000, 0x3d600000, 0 }, /* lis r11, xxxx */ |
| 267 | { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */ |
| 268 | { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */ |
| 269 | { 0xffffffff, 0x4e800420, 0 }, /* bctr */ |
| 270 | { 0, 0, 0 } |
| 271 | }; |
| 272 | |
| 273 | /* PLT stubs in a shared library or PIE. |
| 274 | The first variant is used when the PLT entry is within +/-32k of |
| 275 | the GOT pointer (r30). */ |
| 276 | static const struct ppc_insn_pattern powerpc32_plt_stub_so_1[] = |
| 277 | { |
| 278 | { 0xffff0000, 0x817e0000, 0 }, /* lwz r11, xxxx(r30) */ |
| 279 | { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */ |
| 280 | { 0xffffffff, 0x4e800420, 0 }, /* bctr */ |
| 281 | { 0, 0, 0 } |
| 282 | }; |
| 283 | |
| 284 | /* The second variant is used when the PLT entry is more than +/-32k |
| 285 | from the GOT pointer (r30). */ |
| 286 | static const struct ppc_insn_pattern powerpc32_plt_stub_so_2[] = |
| 287 | { |
| 288 | { 0xffff0000, 0x3d7e0000, 0 }, /* addis r11, r30, xxxx */ |
| 289 | { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */ |
| 290 | { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */ |
| 291 | { 0xffffffff, 0x4e800420, 0 }, /* bctr */ |
| 292 | { 0, 0, 0 } |
| 293 | }; |
| 294 | |
| 295 | /* The max number of insns we check using ppc_insns_match_pattern. */ |
| 296 | #define POWERPC32_PLT_CHECK_LEN (ARRAY_SIZE (powerpc32_plt_stub) - 1) |
| 297 | |
| 298 | /* Check if PC is in PLT stub. For non-secure PLT, stub is in .plt |
| 299 | section. For secure PLT, stub is in .text and we need to check |
| 300 | instruction patterns. */ |
| 301 | |
| 302 | static int |
| 303 | powerpc_linux_in_dynsym_resolve_code (CORE_ADDR pc) |
| 304 | { |
| 305 | struct bound_minimal_symbol sym; |
| 306 | |
| 307 | /* Check whether PC is in the dynamic linker. This also checks |
| 308 | whether it is in the .plt section, used by non-PIC executables. */ |
| 309 | if (svr4_in_dynsym_resolve_code (pc)) |
| 310 | return 1; |
| 311 | |
| 312 | /* Check if we are in the resolver. */ |
| 313 | sym = lookup_minimal_symbol_by_pc (pc); |
| 314 | if (sym.minsym != NULL |
| 315 | && (strcmp (sym.minsym->linkage_name (), "__glink") == 0 |
| 316 | || strcmp (sym.minsym->linkage_name (), "__glink_PLTresolve") == 0)) |
| 317 | return 1; |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | /* Follow PLT stub to actual routine. |
| 323 | |
| 324 | When the execution direction is EXEC_REVERSE, scan backward to |
| 325 | check whether we are in the middle of a PLT stub. Currently, |
| 326 | we only look-behind at most 4 instructions (the max length of a PLT |
| 327 | stub sequence. */ |
| 328 | |
| 329 | static CORE_ADDR |
| 330 | ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
| 331 | { |
| 332 | unsigned int insnbuf[POWERPC32_PLT_CHECK_LEN]; |
| 333 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 334 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 335 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 336 | CORE_ADDR target = 0; |
| 337 | int scan_limit, i; |
| 338 | |
| 339 | scan_limit = 1; |
| 340 | /* When reverse-debugging, scan backward to check whether we are |
| 341 | in the middle of trampoline code. */ |
| 342 | if (execution_direction == EXEC_REVERSE) |
| 343 | scan_limit = 4; /* At most 4 instructions. */ |
| 344 | |
| 345 | for (i = 0; i < scan_limit; i++) |
| 346 | { |
| 347 | if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf)) |
| 348 | { |
| 349 | /* Calculate PLT entry address from |
| 350 | lis r11, xxxx |
| 351 | lwz r11, xxxx(r11). */ |
| 352 | target = ((ppc_insn_d_field (insnbuf[0]) << 16) |
| 353 | + ppc_insn_d_field (insnbuf[1])); |
| 354 | } |
| 355 | else if (i < ARRAY_SIZE (powerpc32_plt_stub_so_1) - 1 |
| 356 | && ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_1, |
| 357 | insnbuf)) |
| 358 | { |
| 359 | /* Calculate PLT entry address from |
| 360 | lwz r11, xxxx(r30). */ |
| 361 | target = (ppc_insn_d_field (insnbuf[0]) |
| 362 | + get_frame_register_unsigned (frame, |
| 363 | tdep->ppc_gp0_regnum + 30)); |
| 364 | } |
| 365 | else if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_2, |
| 366 | insnbuf)) |
| 367 | { |
| 368 | /* Calculate PLT entry address from |
| 369 | addis r11, r30, xxxx |
| 370 | lwz r11, xxxx(r11). */ |
| 371 | target = ((ppc_insn_d_field (insnbuf[0]) << 16) |
| 372 | + ppc_insn_d_field (insnbuf[1]) |
| 373 | + get_frame_register_unsigned (frame, |
| 374 | tdep->ppc_gp0_regnum + 30)); |
| 375 | } |
| 376 | else |
| 377 | { |
| 378 | /* Scan backward one more instruction if it doesn't match. */ |
| 379 | pc -= 4; |
| 380 | continue; |
| 381 | } |
| 382 | |
| 383 | target = read_memory_unsigned_integer (target, 4, byte_order); |
| 384 | return target; |
| 385 | } |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | /* Wrappers to handle Linux-only registers. */ |
| 391 | |
| 392 | static void |
| 393 | ppc_linux_supply_gregset (const struct regset *regset, |
| 394 | struct regcache *regcache, |
| 395 | int regnum, const void *gregs, size_t len) |
| 396 | { |
| 397 | const struct ppc_reg_offsets *offsets |
| 398 | = (const struct ppc_reg_offsets *) regset->regmap; |
| 399 | |
| 400 | ppc_supply_gregset (regset, regcache, regnum, gregs, len); |
| 401 | |
| 402 | if (ppc_linux_trap_reg_p (regcache->arch ())) |
| 403 | { |
| 404 | /* "orig_r3" is stored 2 slots after "pc". */ |
| 405 | if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM) |
| 406 | ppc_supply_reg (regcache, PPC_ORIG_R3_REGNUM, (const gdb_byte *) gregs, |
| 407 | offsets->pc_offset + 2 * offsets->gpr_size, |
| 408 | offsets->gpr_size); |
| 409 | |
| 410 | /* "trap" is stored 8 slots after "pc". */ |
| 411 | if (regnum == -1 || regnum == PPC_TRAP_REGNUM) |
| 412 | ppc_supply_reg (regcache, PPC_TRAP_REGNUM, (const gdb_byte *) gregs, |
| 413 | offsets->pc_offset + 8 * offsets->gpr_size, |
| 414 | offsets->gpr_size); |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | static void |
| 419 | ppc_linux_collect_gregset (const struct regset *regset, |
| 420 | const struct regcache *regcache, |
| 421 | int regnum, void *gregs, size_t len) |
| 422 | { |
| 423 | const struct ppc_reg_offsets *offsets |
| 424 | = (const struct ppc_reg_offsets *) regset->regmap; |
| 425 | |
| 426 | /* Clear areas in the linux gregset not written elsewhere. */ |
| 427 | if (regnum == -1) |
| 428 | memset (gregs, 0, len); |
| 429 | |
| 430 | ppc_collect_gregset (regset, regcache, regnum, gregs, len); |
| 431 | |
| 432 | if (ppc_linux_trap_reg_p (regcache->arch ())) |
| 433 | { |
| 434 | /* "orig_r3" is stored 2 slots after "pc". */ |
| 435 | if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM) |
| 436 | ppc_collect_reg (regcache, PPC_ORIG_R3_REGNUM, (gdb_byte *) gregs, |
| 437 | offsets->pc_offset + 2 * offsets->gpr_size, |
| 438 | offsets->gpr_size); |
| 439 | |
| 440 | /* "trap" is stored 8 slots after "pc". */ |
| 441 | if (regnum == -1 || regnum == PPC_TRAP_REGNUM) |
| 442 | ppc_collect_reg (regcache, PPC_TRAP_REGNUM, (gdb_byte *) gregs, |
| 443 | offsets->pc_offset + 8 * offsets->gpr_size, |
| 444 | offsets->gpr_size); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | /* Regset descriptions. */ |
| 449 | static const struct ppc_reg_offsets ppc32_linux_reg_offsets = |
| 450 | { |
| 451 | /* General-purpose registers. */ |
| 452 | /* .r0_offset = */ 0, |
| 453 | /* .gpr_size = */ 4, |
| 454 | /* .xr_size = */ 4, |
| 455 | /* .pc_offset = */ 128, |
| 456 | /* .ps_offset = */ 132, |
| 457 | /* .cr_offset = */ 152, |
| 458 | /* .lr_offset = */ 144, |
| 459 | /* .ctr_offset = */ 140, |
| 460 | /* .xer_offset = */ 148, |
| 461 | /* .mq_offset = */ 156, |
| 462 | |
| 463 | /* Floating-point registers. */ |
| 464 | /* .f0_offset = */ 0, |
| 465 | /* .fpscr_offset = */ 256, |
| 466 | /* .fpscr_size = */ 8 |
| 467 | }; |
| 468 | |
| 469 | static const struct ppc_reg_offsets ppc64_linux_reg_offsets = |
| 470 | { |
| 471 | /* General-purpose registers. */ |
| 472 | /* .r0_offset = */ 0, |
| 473 | /* .gpr_size = */ 8, |
| 474 | /* .xr_size = */ 8, |
| 475 | /* .pc_offset = */ 256, |
| 476 | /* .ps_offset = */ 264, |
| 477 | /* .cr_offset = */ 304, |
| 478 | /* .lr_offset = */ 288, |
| 479 | /* .ctr_offset = */ 280, |
| 480 | /* .xer_offset = */ 296, |
| 481 | /* .mq_offset = */ 312, |
| 482 | |
| 483 | /* Floating-point registers. */ |
| 484 | /* .f0_offset = */ 0, |
| 485 | /* .fpscr_offset = */ 256, |
| 486 | /* .fpscr_size = */ 8 |
| 487 | }; |
| 488 | |
| 489 | static const struct regset ppc32_linux_gregset = { |
| 490 | &ppc32_linux_reg_offsets, |
| 491 | ppc_linux_supply_gregset, |
| 492 | ppc_linux_collect_gregset |
| 493 | }; |
| 494 | |
| 495 | static const struct regset ppc64_linux_gregset = { |
| 496 | &ppc64_linux_reg_offsets, |
| 497 | ppc_linux_supply_gregset, |
| 498 | ppc_linux_collect_gregset |
| 499 | }; |
| 500 | |
| 501 | static const struct regset ppc32_linux_fpregset = { |
| 502 | &ppc32_linux_reg_offsets, |
| 503 | ppc_supply_fpregset, |
| 504 | ppc_collect_fpregset |
| 505 | }; |
| 506 | |
| 507 | static const struct regcache_map_entry ppc32_le_linux_vrregmap[] = |
| 508 | { |
| 509 | { 32, PPC_VR0_REGNUM, 16 }, |
| 510 | { 1, PPC_VSCR_REGNUM, 4 }, |
| 511 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 512 | { 1, PPC_VRSAVE_REGNUM, 4 }, |
| 513 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 514 | { 0 } |
| 515 | }; |
| 516 | |
| 517 | static const struct regcache_map_entry ppc32_be_linux_vrregmap[] = |
| 518 | { |
| 519 | { 32, PPC_VR0_REGNUM, 16 }, |
| 520 | { 1, REGCACHE_MAP_SKIP, 12}, |
| 521 | { 1, PPC_VSCR_REGNUM, 4 }, |
| 522 | { 1, PPC_VRSAVE_REGNUM, 4 }, |
| 523 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 524 | { 0 } |
| 525 | }; |
| 526 | |
| 527 | static const struct regset ppc32_le_linux_vrregset = { |
| 528 | ppc32_le_linux_vrregmap, |
| 529 | regcache_supply_regset, |
| 530 | regcache_collect_regset |
| 531 | }; |
| 532 | |
| 533 | static const struct regset ppc32_be_linux_vrregset = { |
| 534 | ppc32_be_linux_vrregmap, |
| 535 | regcache_supply_regset, |
| 536 | regcache_collect_regset |
| 537 | }; |
| 538 | |
| 539 | static const struct regcache_map_entry ppc32_linux_vsxregmap[] = |
| 540 | { |
| 541 | { 32, PPC_VSR0_UPPER_REGNUM, 8 }, |
| 542 | { 0 } |
| 543 | }; |
| 544 | |
| 545 | static const struct regset ppc32_linux_vsxregset = { |
| 546 | ppc32_linux_vsxregmap, |
| 547 | regcache_supply_regset, |
| 548 | regcache_collect_regset |
| 549 | }; |
| 550 | |
| 551 | /* Program Priorty Register regmap. */ |
| 552 | |
| 553 | static const struct regcache_map_entry ppc32_regmap_ppr[] = |
| 554 | { |
| 555 | { 1, PPC_PPR_REGNUM, 8 }, |
| 556 | { 0 } |
| 557 | }; |
| 558 | |
| 559 | /* Program Priorty Register regset. */ |
| 560 | |
| 561 | const struct regset ppc32_linux_pprregset = { |
| 562 | ppc32_regmap_ppr, |
| 563 | regcache_supply_regset, |
| 564 | regcache_collect_regset |
| 565 | }; |
| 566 | |
| 567 | /* Data Stream Control Register regmap. */ |
| 568 | |
| 569 | static const struct regcache_map_entry ppc32_regmap_dscr[] = |
| 570 | { |
| 571 | { 1, PPC_DSCR_REGNUM, 8 }, |
| 572 | { 0 } |
| 573 | }; |
| 574 | |
| 575 | /* Data Stream Control Register regset. */ |
| 576 | |
| 577 | const struct regset ppc32_linux_dscrregset = { |
| 578 | ppc32_regmap_dscr, |
| 579 | regcache_supply_regset, |
| 580 | regcache_collect_regset |
| 581 | }; |
| 582 | |
| 583 | /* Target Address Register regmap. */ |
| 584 | |
| 585 | static const struct regcache_map_entry ppc32_regmap_tar[] = |
| 586 | { |
| 587 | { 1, PPC_TAR_REGNUM, 8 }, |
| 588 | { 0 } |
| 589 | }; |
| 590 | |
| 591 | /* Target Address Register regset. */ |
| 592 | |
| 593 | const struct regset ppc32_linux_tarregset = { |
| 594 | ppc32_regmap_tar, |
| 595 | regcache_supply_regset, |
| 596 | regcache_collect_regset |
| 597 | }; |
| 598 | |
| 599 | /* Event-Based Branching regmap. */ |
| 600 | |
| 601 | static const struct regcache_map_entry ppc32_regmap_ebb[] = |
| 602 | { |
| 603 | { 1, PPC_EBBRR_REGNUM, 8 }, |
| 604 | { 1, PPC_EBBHR_REGNUM, 8 }, |
| 605 | { 1, PPC_BESCR_REGNUM, 8 }, |
| 606 | { 0 } |
| 607 | }; |
| 608 | |
| 609 | /* Event-Based Branching regset. */ |
| 610 | |
| 611 | const struct regset ppc32_linux_ebbregset = { |
| 612 | ppc32_regmap_ebb, |
| 613 | regcache_supply_regset, |
| 614 | regcache_collect_regset |
| 615 | }; |
| 616 | |
| 617 | /* Performance Monitoring Unit regmap. */ |
| 618 | |
| 619 | static const struct regcache_map_entry ppc32_regmap_pmu[] = |
| 620 | { |
| 621 | { 1, PPC_SIAR_REGNUM, 8 }, |
| 622 | { 1, PPC_SDAR_REGNUM, 8 }, |
| 623 | { 1, PPC_SIER_REGNUM, 8 }, |
| 624 | { 1, PPC_MMCR2_REGNUM, 8 }, |
| 625 | { 1, PPC_MMCR0_REGNUM, 8 }, |
| 626 | { 0 } |
| 627 | }; |
| 628 | |
| 629 | /* Performance Monitoring Unit regset. */ |
| 630 | |
| 631 | const struct regset ppc32_linux_pmuregset = { |
| 632 | ppc32_regmap_pmu, |
| 633 | regcache_supply_regset, |
| 634 | regcache_collect_regset |
| 635 | }; |
| 636 | |
| 637 | /* Hardware Transactional Memory special-purpose register regmap. */ |
| 638 | |
| 639 | static const struct regcache_map_entry ppc32_regmap_tm_spr[] = |
| 640 | { |
| 641 | { 1, PPC_TFHAR_REGNUM, 8 }, |
| 642 | { 1, PPC_TEXASR_REGNUM, 8 }, |
| 643 | { 1, PPC_TFIAR_REGNUM, 8 }, |
| 644 | { 0 } |
| 645 | }; |
| 646 | |
| 647 | /* Hardware Transactional Memory special-purpose register regset. */ |
| 648 | |
| 649 | const struct regset ppc32_linux_tm_sprregset = { |
| 650 | ppc32_regmap_tm_spr, |
| 651 | regcache_supply_regset, |
| 652 | regcache_collect_regset |
| 653 | }; |
| 654 | |
| 655 | /* Regmaps for the Hardware Transactional Memory checkpointed |
| 656 | general-purpose regsets for 32-bit, 64-bit big-endian, and 64-bit |
| 657 | little endian targets. The ptrace and core file buffers for 64-bit |
| 658 | targets use 8-byte fields for the 4-byte registers, and the |
| 659 | position of the register in the fields depends on the endianness. |
| 660 | The 32-bit regmap is the same for both endian types because the |
| 661 | fields are all 4-byte long. |
| 662 | |
| 663 | The layout of checkpointed GPR regset is the same as a regular |
| 664 | struct pt_regs, but we skip all registers that are not actually |
| 665 | checkpointed by the processor (e.g. msr, nip), except when |
| 666 | generating a core file. The 64-bit regset is 48 * 8 bytes long. |
| 667 | In some 64-bit kernels, the regset for a 32-bit inferior has the |
| 668 | same length, but all the registers are squeezed in the first half |
| 669 | (48 * 4 bytes). The pt_regs struct calls the regular cr ccr, but |
| 670 | we use ccr for "checkpointed condition register". Note that CR |
| 671 | (condition register) field 0 is not checkpointed, but the kernel |
| 672 | returns all 4 bytes. The skipped registers should not be touched |
| 673 | when writing the regset to the inferior (with |
| 674 | PTRACE_SETREGSET). */ |
| 675 | |
| 676 | static const struct regcache_map_entry ppc32_regmap_cgpr[] = |
| 677 | { |
| 678 | { 32, PPC_CR0_REGNUM, 4 }, |
| 679 | { 3, REGCACHE_MAP_SKIP, 4 }, /* nip, msr, orig_gpr3. */ |
| 680 | { 1, PPC_CCTR_REGNUM, 4 }, |
| 681 | { 1, PPC_CLR_REGNUM, 4 }, |
| 682 | { 1, PPC_CXER_REGNUM, 4 }, |
| 683 | { 1, PPC_CCR_REGNUM, 4 }, |
| 684 | { 9, REGCACHE_MAP_SKIP, 4 }, /* All the rest. */ |
| 685 | { 0 } |
| 686 | }; |
| 687 | |
| 688 | static const struct regcache_map_entry ppc64_le_regmap_cgpr[] = |
| 689 | { |
| 690 | { 32, PPC_CR0_REGNUM, 8 }, |
| 691 | { 3, REGCACHE_MAP_SKIP, 8 }, |
| 692 | { 1, PPC_CCTR_REGNUM, 8 }, |
| 693 | { 1, PPC_CLR_REGNUM, 8 }, |
| 694 | { 1, PPC_CXER_REGNUM, 4 }, |
| 695 | { 1, REGCACHE_MAP_SKIP, 4 }, /* CXER padding. */ |
| 696 | { 1, PPC_CCR_REGNUM, 4 }, |
| 697 | { 1, REGCACHE_MAP_SKIP, 4}, /* CCR padding. */ |
| 698 | { 9, REGCACHE_MAP_SKIP, 8}, |
| 699 | { 0 } |
| 700 | }; |
| 701 | |
| 702 | static const struct regcache_map_entry ppc64_be_regmap_cgpr[] = |
| 703 | { |
| 704 | { 32, PPC_CR0_REGNUM, 8 }, |
| 705 | { 3, REGCACHE_MAP_SKIP, 8 }, |
| 706 | { 1, PPC_CCTR_REGNUM, 8 }, |
| 707 | { 1, PPC_CLR_REGNUM, 8 }, |
| 708 | { 1, REGCACHE_MAP_SKIP, 4}, /* CXER padding. */ |
| 709 | { 1, PPC_CXER_REGNUM, 4 }, |
| 710 | { 1, REGCACHE_MAP_SKIP, 4}, /* CCR padding. */ |
| 711 | { 1, PPC_CCR_REGNUM, 4 }, |
| 712 | { 9, REGCACHE_MAP_SKIP, 8}, |
| 713 | { 0 } |
| 714 | }; |
| 715 | |
| 716 | /* Regsets for the Hardware Transactional Memory checkpointed |
| 717 | general-purpose registers for 32-bit, 64-bit big-endian, and 64-bit |
| 718 | little endian targets. |
| 719 | |
| 720 | Some 64-bit kernels generate a checkpointed gpr note section with |
| 721 | 48*8 bytes for a 32-bit thread, of which only 48*4 are actually |
| 722 | used, so we set the variable size flag in the corresponding regset |
| 723 | to accept this case. */ |
| 724 | |
| 725 | static const struct regset ppc32_linux_cgprregset = { |
| 726 | ppc32_regmap_cgpr, |
| 727 | regcache_supply_regset, |
| 728 | regcache_collect_regset, |
| 729 | REGSET_VARIABLE_SIZE |
| 730 | }; |
| 731 | |
| 732 | static const struct regset ppc64_be_linux_cgprregset = { |
| 733 | ppc64_be_regmap_cgpr, |
| 734 | regcache_supply_regset, |
| 735 | regcache_collect_regset |
| 736 | }; |
| 737 | |
| 738 | static const struct regset ppc64_le_linux_cgprregset = { |
| 739 | ppc64_le_regmap_cgpr, |
| 740 | regcache_supply_regset, |
| 741 | regcache_collect_regset |
| 742 | }; |
| 743 | |
| 744 | /* Hardware Transactional Memory checkpointed floating-point regmap. */ |
| 745 | |
| 746 | static const struct regcache_map_entry ppc32_regmap_cfpr[] = |
| 747 | { |
| 748 | { 32, PPC_CF0_REGNUM, 8 }, |
| 749 | { 1, PPC_CFPSCR_REGNUM, 8 }, |
| 750 | { 0 } |
| 751 | }; |
| 752 | |
| 753 | /* Hardware Transactional Memory checkpointed floating-point regset. */ |
| 754 | |
| 755 | const struct regset ppc32_linux_cfprregset = { |
| 756 | ppc32_regmap_cfpr, |
| 757 | regcache_supply_regset, |
| 758 | regcache_collect_regset |
| 759 | }; |
| 760 | |
| 761 | /* Regmaps for the Hardware Transactional Memory checkpointed vector |
| 762 | regsets, for big and little endian targets. The position of the |
| 763 | 4-byte VSCR in its 16-byte field depends on the endianness. */ |
| 764 | |
| 765 | static const struct regcache_map_entry ppc32_le_regmap_cvmx[] = |
| 766 | { |
| 767 | { 32, PPC_CVR0_REGNUM, 16 }, |
| 768 | { 1, PPC_CVSCR_REGNUM, 4 }, |
| 769 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 770 | { 1, PPC_CVRSAVE_REGNUM, 4 }, |
| 771 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 772 | { 0 } |
| 773 | }; |
| 774 | |
| 775 | static const struct regcache_map_entry ppc32_be_regmap_cvmx[] = |
| 776 | { |
| 777 | { 32, PPC_CVR0_REGNUM, 16 }, |
| 778 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 779 | { 1, PPC_CVSCR_REGNUM, 4 }, |
| 780 | { 1, PPC_CVRSAVE_REGNUM, 4 }, |
| 781 | { 1, REGCACHE_MAP_SKIP, 12}, |
| 782 | { 0 } |
| 783 | }; |
| 784 | |
| 785 | /* Hardware Transactional Memory checkpointed vector regsets, for little |
| 786 | and big endian targets. */ |
| 787 | |
| 788 | static const struct regset ppc32_le_linux_cvmxregset = { |
| 789 | ppc32_le_regmap_cvmx, |
| 790 | regcache_supply_regset, |
| 791 | regcache_collect_regset |
| 792 | }; |
| 793 | |
| 794 | static const struct regset ppc32_be_linux_cvmxregset = { |
| 795 | ppc32_be_regmap_cvmx, |
| 796 | regcache_supply_regset, |
| 797 | regcache_collect_regset |
| 798 | }; |
| 799 | |
| 800 | /* Hardware Transactional Memory checkpointed vector-scalar regmap. */ |
| 801 | |
| 802 | static const struct regcache_map_entry ppc32_regmap_cvsx[] = |
| 803 | { |
| 804 | { 32, PPC_CVSR0_UPPER_REGNUM, 8 }, |
| 805 | { 0 } |
| 806 | }; |
| 807 | |
| 808 | /* Hardware Transactional Memory checkpointed vector-scalar regset. */ |
| 809 | |
| 810 | const struct regset ppc32_linux_cvsxregset = { |
| 811 | ppc32_regmap_cvsx, |
| 812 | regcache_supply_regset, |
| 813 | regcache_collect_regset |
| 814 | }; |
| 815 | |
| 816 | /* Hardware Transactional Memory checkpointed Program Priority Register |
| 817 | regmap. */ |
| 818 | |
| 819 | static const struct regcache_map_entry ppc32_regmap_cppr[] = |
| 820 | { |
| 821 | { 1, PPC_CPPR_REGNUM, 8 }, |
| 822 | { 0 } |
| 823 | }; |
| 824 | |
| 825 | /* Hardware Transactional Memory checkpointed Program Priority Register |
| 826 | regset. */ |
| 827 | |
| 828 | const struct regset ppc32_linux_cpprregset = { |
| 829 | ppc32_regmap_cppr, |
| 830 | regcache_supply_regset, |
| 831 | regcache_collect_regset |
| 832 | }; |
| 833 | |
| 834 | /* Hardware Transactional Memory checkpointed Data Stream Control |
| 835 | Register regmap. */ |
| 836 | |
| 837 | static const struct regcache_map_entry ppc32_regmap_cdscr[] = |
| 838 | { |
| 839 | { 1, PPC_CDSCR_REGNUM, 8 }, |
| 840 | { 0 } |
| 841 | }; |
| 842 | |
| 843 | /* Hardware Transactional Memory checkpointed Data Stream Control |
| 844 | Register regset. */ |
| 845 | |
| 846 | const struct regset ppc32_linux_cdscrregset = { |
| 847 | ppc32_regmap_cdscr, |
| 848 | regcache_supply_regset, |
| 849 | regcache_collect_regset |
| 850 | }; |
| 851 | |
| 852 | /* Hardware Transactional Memory checkpointed Target Address Register |
| 853 | regmap. */ |
| 854 | |
| 855 | static const struct regcache_map_entry ppc32_regmap_ctar[] = |
| 856 | { |
| 857 | { 1, PPC_CTAR_REGNUM, 8 }, |
| 858 | { 0 } |
| 859 | }; |
| 860 | |
| 861 | /* Hardware Transactional Memory checkpointed Target Address Register |
| 862 | regset. */ |
| 863 | |
| 864 | const struct regset ppc32_linux_ctarregset = { |
| 865 | ppc32_regmap_ctar, |
| 866 | regcache_supply_regset, |
| 867 | regcache_collect_regset |
| 868 | }; |
| 869 | |
| 870 | const struct regset * |
| 871 | ppc_linux_gregset (int wordsize) |
| 872 | { |
| 873 | return wordsize == 8 ? &ppc64_linux_gregset : &ppc32_linux_gregset; |
| 874 | } |
| 875 | |
| 876 | const struct regset * |
| 877 | ppc_linux_fpregset (void) |
| 878 | { |
| 879 | return &ppc32_linux_fpregset; |
| 880 | } |
| 881 | |
| 882 | const struct regset * |
| 883 | ppc_linux_vrregset (struct gdbarch *gdbarch) |
| 884 | { |
| 885 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 886 | return &ppc32_be_linux_vrregset; |
| 887 | else |
| 888 | return &ppc32_le_linux_vrregset; |
| 889 | } |
| 890 | |
| 891 | const struct regset * |
| 892 | ppc_linux_vsxregset (void) |
| 893 | { |
| 894 | return &ppc32_linux_vsxregset; |
| 895 | } |
| 896 | |
| 897 | const struct regset * |
| 898 | ppc_linux_cgprregset (struct gdbarch *gdbarch) |
| 899 | { |
| 900 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 901 | |
| 902 | if (tdep->wordsize == 4) |
| 903 | { |
| 904 | return &ppc32_linux_cgprregset; |
| 905 | } |
| 906 | else |
| 907 | { |
| 908 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 909 | return &ppc64_be_linux_cgprregset; |
| 910 | else |
| 911 | return &ppc64_le_linux_cgprregset; |
| 912 | } |
| 913 | } |
| 914 | |
| 915 | const struct regset * |
| 916 | ppc_linux_cvmxregset (struct gdbarch *gdbarch) |
| 917 | { |
| 918 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 919 | return &ppc32_be_linux_cvmxregset; |
| 920 | else |
| 921 | return &ppc32_le_linux_cvmxregset; |
| 922 | } |
| 923 | |
| 924 | /* Collect function used to generate the core note for the |
| 925 | checkpointed GPR regset. Here, we don't want to skip the |
| 926 | "checkpointed" NIP and MSR, so that the note section we generate is |
| 927 | similar to the one generated by the kernel. To avoid having to |
| 928 | define additional registers in GDB which are not actually |
| 929 | checkpointed in the architecture, we copy TFHAR to the checkpointed |
| 930 | NIP slot, which is what the kernel does, and copy the regular MSR |
| 931 | to the checkpointed MSR slot, which will have a similar value in |
| 932 | most cases. */ |
| 933 | |
| 934 | static void |
| 935 | ppc_linux_collect_core_cpgrregset (const struct regset *regset, |
| 936 | const struct regcache *regcache, |
| 937 | int regnum, void *buf, size_t len) |
| 938 | { |
| 939 | struct gdbarch *gdbarch = regcache->arch (); |
| 940 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 941 | |
| 942 | const struct regset *cgprregset = ppc_linux_cgprregset (gdbarch); |
| 943 | |
| 944 | /* We collect the checkpointed GPRs already defined in the regular |
| 945 | regmap, then overlay TFHAR/MSR on the checkpointed NIP/MSR |
| 946 | slots. */ |
| 947 | cgprregset->collect_regset (cgprregset, regcache, regnum, buf, len); |
| 948 | |
| 949 | /* Check that we are collecting all the registers, which should be |
| 950 | the case when generating a core file. */ |
| 951 | if (regnum != -1) |
| 952 | return; |
| 953 | |
| 954 | /* PT_NIP and PT_MSR are 32 and 33 for powerpc. Don't redefine |
| 955 | these symbols since this file can run on clients in other |
| 956 | architectures where they can already be defined to other |
| 957 | values. */ |
| 958 | int pt_offset = 32; |
| 959 | |
| 960 | /* Check that our buffer is long enough to hold two slots at |
| 961 | pt_offset * wordsize, one for NIP and one for MSR. */ |
| 962 | gdb_assert ((pt_offset + 2) * tdep->wordsize <= len); |
| 963 | |
| 964 | /* TFHAR is 8 bytes wide, but the NIP slot for a 32-bit thread is |
| 965 | 4-bytes long. We use raw_collect_integer which handles |
| 966 | differences in the sizes for the source and destination buffers |
| 967 | for both endian modes. */ |
| 968 | (regcache->raw_collect_integer |
| 969 | (PPC_TFHAR_REGNUM, ((gdb_byte *) buf) + pt_offset * tdep->wordsize, |
| 970 | tdep->wordsize, false)); |
| 971 | |
| 972 | pt_offset = 33; |
| 973 | |
| 974 | (regcache->raw_collect_integer |
| 975 | (PPC_MSR_REGNUM, ((gdb_byte *) buf) + pt_offset * tdep->wordsize, |
| 976 | tdep->wordsize, false)); |
| 977 | } |
| 978 | |
| 979 | /* Iterate over supported core file register note sections. */ |
| 980 | |
| 981 | static void |
| 982 | ppc_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, |
| 983 | iterate_over_regset_sections_cb *cb, |
| 984 | void *cb_data, |
| 985 | const struct regcache *regcache) |
| 986 | { |
| 987 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 988 | int have_altivec = tdep->ppc_vr0_regnum != -1; |
| 989 | int have_vsx = tdep->ppc_vsr0_upper_regnum != -1; |
| 990 | int have_ppr = tdep->ppc_ppr_regnum != -1; |
| 991 | int have_dscr = tdep->ppc_dscr_regnum != -1; |
| 992 | int have_tar = tdep->ppc_tar_regnum != -1; |
| 993 | |
| 994 | if (tdep->wordsize == 4) |
| 995 | cb (".reg", 48 * 4, 48 * 4, &ppc32_linux_gregset, NULL, cb_data); |
| 996 | else |
| 997 | cb (".reg", 48 * 8, 48 * 8, &ppc64_linux_gregset, NULL, cb_data); |
| 998 | |
| 999 | cb (".reg2", 264, 264, &ppc32_linux_fpregset, NULL, cb_data); |
| 1000 | |
| 1001 | if (have_altivec) |
| 1002 | { |
| 1003 | const struct regset *vrregset = ppc_linux_vrregset (gdbarch); |
| 1004 | cb (".reg-ppc-vmx", PPC_LINUX_SIZEOF_VRREGSET, PPC_LINUX_SIZEOF_VRREGSET, |
| 1005 | vrregset, "ppc Altivec", cb_data); |
| 1006 | } |
| 1007 | |
| 1008 | if (have_vsx) |
| 1009 | cb (".reg-ppc-vsx", PPC_LINUX_SIZEOF_VSXREGSET, PPC_LINUX_SIZEOF_VSXREGSET, |
| 1010 | &ppc32_linux_vsxregset, "POWER7 VSX", cb_data); |
| 1011 | |
| 1012 | if (have_ppr) |
| 1013 | cb (".reg-ppc-ppr", PPC_LINUX_SIZEOF_PPRREGSET, |
| 1014 | PPC_LINUX_SIZEOF_PPRREGSET, |
| 1015 | &ppc32_linux_pprregset, "Priority Program Register", cb_data); |
| 1016 | |
| 1017 | if (have_dscr) |
| 1018 | cb (".reg-ppc-dscr", PPC_LINUX_SIZEOF_DSCRREGSET, |
| 1019 | PPC_LINUX_SIZEOF_DSCRREGSET, |
| 1020 | &ppc32_linux_dscrregset, "Data Stream Control Register", |
| 1021 | cb_data); |
| 1022 | |
| 1023 | if (have_tar) |
| 1024 | cb (".reg-ppc-tar", PPC_LINUX_SIZEOF_TARREGSET, |
| 1025 | PPC_LINUX_SIZEOF_TARREGSET, |
| 1026 | &ppc32_linux_tarregset, "Target Address Register", cb_data); |
| 1027 | |
| 1028 | /* EBB registers are unavailable when ptrace returns ENODATA. Check |
| 1029 | availability when generating a core file (regcache != NULL). */ |
| 1030 | if (tdep->have_ebb) |
| 1031 | if (regcache == NULL |
| 1032 | || REG_VALID == regcache->get_register_status (PPC_BESCR_REGNUM)) |
| 1033 | cb (".reg-ppc-ebb", PPC_LINUX_SIZEOF_EBBREGSET, |
| 1034 | PPC_LINUX_SIZEOF_EBBREGSET, |
| 1035 | &ppc32_linux_ebbregset, "Event-based Branching Registers", |
| 1036 | cb_data); |
| 1037 | |
| 1038 | if (tdep->ppc_mmcr0_regnum != -1) |
| 1039 | cb (".reg-ppc-pmu", PPC_LINUX_SIZEOF_PMUREGSET, |
| 1040 | PPC_LINUX_SIZEOF_PMUREGSET, |
| 1041 | &ppc32_linux_pmuregset, "Performance Monitor Registers", |
| 1042 | cb_data); |
| 1043 | |
| 1044 | if (tdep->have_htm_spr) |
| 1045 | cb (".reg-ppc-tm-spr", PPC_LINUX_SIZEOF_TM_SPRREGSET, |
| 1046 | PPC_LINUX_SIZEOF_TM_SPRREGSET, |
| 1047 | &ppc32_linux_tm_sprregset, |
| 1048 | "Hardware Transactional Memory Special Purpose Registers", |
| 1049 | cb_data); |
| 1050 | |
| 1051 | /* Checkpointed registers can be unavailable, don't call back if |
| 1052 | we are generating a core file. */ |
| 1053 | |
| 1054 | if (tdep->have_htm_core) |
| 1055 | { |
| 1056 | /* Only generate the checkpointed GPR core note if we also have |
| 1057 | access to the HTM SPRs, because we need TFHAR to fill the |
| 1058 | "checkpointed" NIP slot. We can read a core file without it |
| 1059 | since GDB is not aware of this NIP as a visible register. */ |
| 1060 | if (regcache == NULL || |
| 1061 | (REG_VALID == regcache->get_register_status (PPC_CR0_REGNUM) |
| 1062 | && tdep->have_htm_spr)) |
| 1063 | { |
| 1064 | int cgpr_size = (tdep->wordsize == 4? |
| 1065 | PPC32_LINUX_SIZEOF_CGPRREGSET |
| 1066 | : PPC64_LINUX_SIZEOF_CGPRREGSET); |
| 1067 | |
| 1068 | const struct regset *cgprregset = |
| 1069 | ppc_linux_cgprregset (gdbarch); |
| 1070 | |
| 1071 | if (regcache != NULL) |
| 1072 | { |
| 1073 | struct regset core_cgprregset = *cgprregset; |
| 1074 | |
| 1075 | core_cgprregset.collect_regset |
| 1076 | = ppc_linux_collect_core_cpgrregset; |
| 1077 | |
| 1078 | cb (".reg-ppc-tm-cgpr", |
| 1079 | cgpr_size, cgpr_size, |
| 1080 | &core_cgprregset, |
| 1081 | "Checkpointed General Purpose Registers", cb_data); |
| 1082 | } |
| 1083 | else |
| 1084 | { |
| 1085 | cb (".reg-ppc-tm-cgpr", |
| 1086 | cgpr_size, cgpr_size, |
| 1087 | cgprregset, |
| 1088 | "Checkpointed General Purpose Registers", cb_data); |
| 1089 | } |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | if (tdep->have_htm_fpu) |
| 1094 | { |
| 1095 | if (regcache == NULL || |
| 1096 | REG_VALID == regcache->get_register_status (PPC_CF0_REGNUM)) |
| 1097 | cb (".reg-ppc-tm-cfpr", PPC_LINUX_SIZEOF_CFPRREGSET, |
| 1098 | PPC_LINUX_SIZEOF_CFPRREGSET, |
| 1099 | &ppc32_linux_cfprregset, |
| 1100 | "Checkpointed Floating Point Registers", cb_data); |
| 1101 | } |
| 1102 | |
| 1103 | if (tdep->have_htm_altivec) |
| 1104 | { |
| 1105 | if (regcache == NULL || |
| 1106 | REG_VALID == regcache->get_register_status (PPC_CVR0_REGNUM)) |
| 1107 | { |
| 1108 | const struct regset *cvmxregset = |
| 1109 | ppc_linux_cvmxregset (gdbarch); |
| 1110 | |
| 1111 | cb (".reg-ppc-tm-cvmx", PPC_LINUX_SIZEOF_CVMXREGSET, |
| 1112 | PPC_LINUX_SIZEOF_CVMXREGSET, |
| 1113 | cvmxregset, |
| 1114 | "Checkpointed Altivec (VMX) Registers", cb_data); |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | if (tdep->have_htm_vsx) |
| 1119 | { |
| 1120 | if (regcache == NULL || |
| 1121 | (REG_VALID |
| 1122 | == regcache->get_register_status (PPC_CVSR0_UPPER_REGNUM))) |
| 1123 | cb (".reg-ppc-tm-cvsx", PPC_LINUX_SIZEOF_CVSXREGSET, |
| 1124 | PPC_LINUX_SIZEOF_CVSXREGSET, |
| 1125 | &ppc32_linux_cvsxregset, |
| 1126 | "Checkpointed VSX Registers", cb_data); |
| 1127 | } |
| 1128 | |
| 1129 | if (tdep->ppc_cppr_regnum != -1) |
| 1130 | { |
| 1131 | if (regcache == NULL || |
| 1132 | REG_VALID == regcache->get_register_status (PPC_CPPR_REGNUM)) |
| 1133 | cb (".reg-ppc-tm-cppr", PPC_LINUX_SIZEOF_CPPRREGSET, |
| 1134 | PPC_LINUX_SIZEOF_CPPRREGSET, |
| 1135 | &ppc32_linux_cpprregset, |
| 1136 | "Checkpointed Priority Program Register", cb_data); |
| 1137 | } |
| 1138 | |
| 1139 | if (tdep->ppc_cdscr_regnum != -1) |
| 1140 | { |
| 1141 | if (regcache == NULL || |
| 1142 | REG_VALID == regcache->get_register_status (PPC_CDSCR_REGNUM)) |
| 1143 | cb (".reg-ppc-tm-cdscr", PPC_LINUX_SIZEOF_CDSCRREGSET, |
| 1144 | PPC_LINUX_SIZEOF_CDSCRREGSET, |
| 1145 | &ppc32_linux_cdscrregset, |
| 1146 | "Checkpointed Data Stream Control Register", cb_data); |
| 1147 | } |
| 1148 | |
| 1149 | if (tdep->ppc_ctar_regnum) |
| 1150 | { |
| 1151 | if ( regcache == NULL || |
| 1152 | REG_VALID == regcache->get_register_status (PPC_CTAR_REGNUM)) |
| 1153 | cb (".reg-ppc-tm-ctar", PPC_LINUX_SIZEOF_CTARREGSET, |
| 1154 | PPC_LINUX_SIZEOF_CTARREGSET, |
| 1155 | &ppc32_linux_ctarregset, |
| 1156 | "Checkpointed Target Address Register", cb_data); |
| 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | static void |
| 1161 | ppc_linux_sigtramp_cache (struct frame_info *this_frame, |
| 1162 | struct trad_frame_cache *this_cache, |
| 1163 | CORE_ADDR func, LONGEST offset, |
| 1164 | int bias) |
| 1165 | { |
| 1166 | CORE_ADDR base; |
| 1167 | CORE_ADDR regs; |
| 1168 | CORE_ADDR gpregs; |
| 1169 | CORE_ADDR fpregs; |
| 1170 | int i; |
| 1171 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 1172 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1173 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1174 | |
| 1175 | base = get_frame_register_unsigned (this_frame, |
| 1176 | gdbarch_sp_regnum (gdbarch)); |
| 1177 | if (bias > 0 && get_frame_pc (this_frame) != func) |
| 1178 | /* See below, some signal trampolines increment the stack as their |
| 1179 | first instruction, need to compensate for that. */ |
| 1180 | base -= bias; |
| 1181 | |
| 1182 | /* Find the address of the register buffer pointer. */ |
| 1183 | regs = base + offset; |
| 1184 | /* Use that to find the address of the corresponding register |
| 1185 | buffers. */ |
| 1186 | gpregs = read_memory_unsigned_integer (regs, tdep->wordsize, byte_order); |
| 1187 | fpregs = gpregs + 48 * tdep->wordsize; |
| 1188 | |
| 1189 | /* General purpose. */ |
| 1190 | for (i = 0; i < 32; i++) |
| 1191 | { |
| 1192 | int regnum = i + tdep->ppc_gp0_regnum; |
| 1193 | trad_frame_set_reg_addr (this_cache, |
| 1194 | regnum, gpregs + i * tdep->wordsize); |
| 1195 | } |
| 1196 | trad_frame_set_reg_addr (this_cache, |
| 1197 | gdbarch_pc_regnum (gdbarch), |
| 1198 | gpregs + 32 * tdep->wordsize); |
| 1199 | trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, |
| 1200 | gpregs + 35 * tdep->wordsize); |
| 1201 | trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, |
| 1202 | gpregs + 36 * tdep->wordsize); |
| 1203 | trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, |
| 1204 | gpregs + 37 * tdep->wordsize); |
| 1205 | trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, |
| 1206 | gpregs + 38 * tdep->wordsize); |
| 1207 | |
| 1208 | if (ppc_linux_trap_reg_p (gdbarch)) |
| 1209 | { |
| 1210 | trad_frame_set_reg_addr (this_cache, PPC_ORIG_R3_REGNUM, |
| 1211 | gpregs + 34 * tdep->wordsize); |
| 1212 | trad_frame_set_reg_addr (this_cache, PPC_TRAP_REGNUM, |
| 1213 | gpregs + 40 * tdep->wordsize); |
| 1214 | } |
| 1215 | |
| 1216 | if (ppc_floating_point_unit_p (gdbarch)) |
| 1217 | { |
| 1218 | /* Floating point registers. */ |
| 1219 | for (i = 0; i < 32; i++) |
| 1220 | { |
| 1221 | int regnum = i + gdbarch_fp0_regnum (gdbarch); |
| 1222 | trad_frame_set_reg_addr (this_cache, regnum, |
| 1223 | fpregs + i * tdep->wordsize); |
| 1224 | } |
| 1225 | trad_frame_set_reg_addr (this_cache, tdep->ppc_fpscr_regnum, |
| 1226 | fpregs + 32 * tdep->wordsize); |
| 1227 | } |
| 1228 | trad_frame_set_id (this_cache, frame_id_build (base, func)); |
| 1229 | } |
| 1230 | |
| 1231 | static void |
| 1232 | ppc32_linux_sigaction_cache_init (const struct tramp_frame *self, |
| 1233 | struct frame_info *this_frame, |
| 1234 | struct trad_frame_cache *this_cache, |
| 1235 | CORE_ADDR func) |
| 1236 | { |
| 1237 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 1238 | 0xd0 /* Offset to ucontext_t. */ |
| 1239 | + 0x30 /* Offset to .reg. */, |
| 1240 | 0); |
| 1241 | } |
| 1242 | |
| 1243 | static void |
| 1244 | ppc64_linux_sigaction_cache_init (const struct tramp_frame *self, |
| 1245 | struct frame_info *this_frame, |
| 1246 | struct trad_frame_cache *this_cache, |
| 1247 | CORE_ADDR func) |
| 1248 | { |
| 1249 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 1250 | 0x80 /* Offset to ucontext_t. */ |
| 1251 | + 0xe0 /* Offset to .reg. */, |
| 1252 | 128); |
| 1253 | } |
| 1254 | |
| 1255 | static void |
| 1256 | ppc32_linux_sighandler_cache_init (const struct tramp_frame *self, |
| 1257 | struct frame_info *this_frame, |
| 1258 | struct trad_frame_cache *this_cache, |
| 1259 | CORE_ADDR func) |
| 1260 | { |
| 1261 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 1262 | 0x40 /* Offset to ucontext_t. */ |
| 1263 | + 0x1c /* Offset to .reg. */, |
| 1264 | 0); |
| 1265 | } |
| 1266 | |
| 1267 | static void |
| 1268 | ppc64_linux_sighandler_cache_init (const struct tramp_frame *self, |
| 1269 | struct frame_info *this_frame, |
| 1270 | struct trad_frame_cache *this_cache, |
| 1271 | CORE_ADDR func) |
| 1272 | { |
| 1273 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 1274 | 0x80 /* Offset to struct sigcontext. */ |
| 1275 | + 0x38 /* Offset to .reg. */, |
| 1276 | 128); |
| 1277 | } |
| 1278 | |
| 1279 | static struct tramp_frame ppc32_linux_sigaction_tramp_frame = { |
| 1280 | SIGTRAMP_FRAME, |
| 1281 | 4, |
| 1282 | { |
| 1283 | { 0x380000ac, ULONGEST_MAX }, /* li r0, 172 */ |
| 1284 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 1285 | { TRAMP_SENTINEL_INSN }, |
| 1286 | }, |
| 1287 | ppc32_linux_sigaction_cache_init |
| 1288 | }; |
| 1289 | static struct tramp_frame ppc64_linux_sigaction_tramp_frame = { |
| 1290 | SIGTRAMP_FRAME, |
| 1291 | 4, |
| 1292 | { |
| 1293 | { 0x38210080, ULONGEST_MAX }, /* addi r1,r1,128 */ |
| 1294 | { 0x380000ac, ULONGEST_MAX }, /* li r0, 172 */ |
| 1295 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 1296 | { TRAMP_SENTINEL_INSN }, |
| 1297 | }, |
| 1298 | ppc64_linux_sigaction_cache_init |
| 1299 | }; |
| 1300 | static struct tramp_frame ppc32_linux_sighandler_tramp_frame = { |
| 1301 | SIGTRAMP_FRAME, |
| 1302 | 4, |
| 1303 | { |
| 1304 | { 0x38000077, ULONGEST_MAX }, /* li r0,119 */ |
| 1305 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 1306 | { TRAMP_SENTINEL_INSN }, |
| 1307 | }, |
| 1308 | ppc32_linux_sighandler_cache_init |
| 1309 | }; |
| 1310 | static struct tramp_frame ppc64_linux_sighandler_tramp_frame = { |
| 1311 | SIGTRAMP_FRAME, |
| 1312 | 4, |
| 1313 | { |
| 1314 | { 0x38210080, ULONGEST_MAX }, /* addi r1,r1,128 */ |
| 1315 | { 0x38000077, ULONGEST_MAX }, /* li r0,119 */ |
| 1316 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 1317 | { TRAMP_SENTINEL_INSN }, |
| 1318 | }, |
| 1319 | ppc64_linux_sighandler_cache_init |
| 1320 | }; |
| 1321 | |
| 1322 | /* Return 1 if PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM are usable. */ |
| 1323 | int |
| 1324 | ppc_linux_trap_reg_p (struct gdbarch *gdbarch) |
| 1325 | { |
| 1326 | /* If we do not have a target description with registers, then |
| 1327 | the special registers will not be included in the register set. */ |
| 1328 | if (!tdesc_has_registers (gdbarch_target_desc (gdbarch))) |
| 1329 | return 0; |
| 1330 | |
| 1331 | /* If we do, then it is safe to check the size. */ |
| 1332 | return register_size (gdbarch, PPC_ORIG_R3_REGNUM) > 0 |
| 1333 | && register_size (gdbarch, PPC_TRAP_REGNUM) > 0; |
| 1334 | } |
| 1335 | |
| 1336 | /* Return the current system call's number present in the |
| 1337 | r0 register. When the function fails, it returns -1. */ |
| 1338 | static LONGEST |
| 1339 | ppc_linux_get_syscall_number (struct gdbarch *gdbarch, |
| 1340 | thread_info *thread) |
| 1341 | { |
| 1342 | struct regcache *regcache = get_thread_regcache (thread); |
| 1343 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1344 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1345 | |
| 1346 | /* Make sure we're in a 32- or 64-bit machine */ |
| 1347 | gdb_assert (tdep->wordsize == 4 || tdep->wordsize == 8); |
| 1348 | |
| 1349 | /* The content of a register */ |
| 1350 | gdb::byte_vector buf (tdep->wordsize); |
| 1351 | |
| 1352 | /* Getting the system call number from the register. |
| 1353 | When dealing with PowerPC architecture, this information |
| 1354 | is stored at 0th register. */ |
| 1355 | regcache->cooked_read (tdep->ppc_gp0_regnum, buf.data ()); |
| 1356 | |
| 1357 | return extract_signed_integer (buf.data (), tdep->wordsize, byte_order); |
| 1358 | } |
| 1359 | |
| 1360 | /* PPC process record-replay */ |
| 1361 | |
| 1362 | static struct linux_record_tdep ppc_linux_record_tdep; |
| 1363 | static struct linux_record_tdep ppc64_linux_record_tdep; |
| 1364 | |
| 1365 | /* ppc_canonicalize_syscall maps from the native PowerPC Linux set of |
| 1366 | syscall ids into a canonical set of syscall ids used by process |
| 1367 | record. (See arch/powerpc/include/uapi/asm/unistd.h in kernel tree.) |
| 1368 | Return -1 if this system call is not supported by process record. |
| 1369 | Otherwise, return the syscall number for process record of given |
| 1370 | SYSCALL. */ |
| 1371 | |
| 1372 | static enum gdb_syscall |
| 1373 | ppc_canonicalize_syscall (int syscall) |
| 1374 | { |
| 1375 | int result = -1; |
| 1376 | |
| 1377 | if (syscall <= 165) |
| 1378 | result = syscall; |
| 1379 | else if (syscall >= 167 && syscall <= 190) /* Skip query_module 166 */ |
| 1380 | result = syscall + 1; |
| 1381 | else if (syscall >= 192 && syscall <= 197) /* mmap2 */ |
| 1382 | result = syscall; |
| 1383 | else if (syscall == 208) /* tkill */ |
| 1384 | result = gdb_sys_tkill; |
| 1385 | else if (syscall >= 207 && syscall <= 220) /* gettid */ |
| 1386 | result = syscall + 224 - 207; |
| 1387 | else if (syscall >= 234 && syscall <= 239) /* exit_group */ |
| 1388 | result = syscall + 252 - 234; |
| 1389 | else if (syscall >= 240 && syscall <= 248) /* timer_create */ |
| 1390 | result = syscall += 259 - 240; |
| 1391 | else if (syscall >= 250 && syscall <= 251) /* tgkill */ |
| 1392 | result = syscall + 270 - 250; |
| 1393 | else if (syscall == 336) |
| 1394 | result = gdb_sys_recv; |
| 1395 | else if (syscall == 337) |
| 1396 | result = gdb_sys_recvfrom; |
| 1397 | else if (syscall == 342) |
| 1398 | result = gdb_sys_recvmsg; |
| 1399 | |
| 1400 | return (enum gdb_syscall) result; |
| 1401 | } |
| 1402 | |
| 1403 | /* Record registers which might be clobbered during system call. |
| 1404 | Return 0 if successful. */ |
| 1405 | |
| 1406 | static int |
| 1407 | ppc_linux_syscall_record (struct regcache *regcache) |
| 1408 | { |
| 1409 | struct gdbarch *gdbarch = regcache->arch (); |
| 1410 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1411 | ULONGEST scnum; |
| 1412 | enum gdb_syscall syscall_gdb; |
| 1413 | int ret; |
| 1414 | |
| 1415 | regcache_raw_read_unsigned (regcache, tdep->ppc_gp0_regnum, &scnum); |
| 1416 | syscall_gdb = ppc_canonicalize_syscall (scnum); |
| 1417 | |
| 1418 | if (syscall_gdb < 0) |
| 1419 | { |
| 1420 | printf_unfiltered (_("Process record and replay target doesn't " |
| 1421 | "support syscall number %d\n"), (int) scnum); |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
| 1425 | if (syscall_gdb == gdb_sys_sigreturn |
| 1426 | || syscall_gdb == gdb_sys_rt_sigreturn) |
| 1427 | { |
| 1428 | int i, j; |
| 1429 | int regsets[] = { tdep->ppc_gp0_regnum, |
| 1430 | tdep->ppc_fp0_regnum, |
| 1431 | tdep->ppc_vr0_regnum, |
| 1432 | tdep->ppc_vsr0_upper_regnum }; |
| 1433 | |
| 1434 | for (j = 0; j < 4; j++) |
| 1435 | { |
| 1436 | if (regsets[j] == -1) |
| 1437 | continue; |
| 1438 | for (i = 0; i < 32; i++) |
| 1439 | { |
| 1440 | if (record_full_arch_list_add_reg (regcache, regsets[j] + i)) |
| 1441 | return -1; |
| 1442 | } |
| 1443 | } |
| 1444 | |
| 1445 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum)) |
| 1446 | return -1; |
| 1447 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum)) |
| 1448 | return -1; |
| 1449 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum)) |
| 1450 | return -1; |
| 1451 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_xer_regnum)) |
| 1452 | return -1; |
| 1453 | |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
| 1457 | if (tdep->wordsize == 8) |
| 1458 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 1459 | &ppc64_linux_record_tdep); |
| 1460 | else |
| 1461 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 1462 | &ppc_linux_record_tdep); |
| 1463 | |
| 1464 | if (ret != 0) |
| 1465 | return ret; |
| 1466 | |
| 1467 | /* Record registers clobbered during syscall. */ |
| 1468 | for (int i = 3; i <= 12; i++) |
| 1469 | { |
| 1470 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + i)) |
| 1471 | return -1; |
| 1472 | } |
| 1473 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + 0)) |
| 1474 | return -1; |
| 1475 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum)) |
| 1476 | return -1; |
| 1477 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum)) |
| 1478 | return -1; |
| 1479 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum)) |
| 1480 | return -1; |
| 1481 | |
| 1482 | return 0; |
| 1483 | } |
| 1484 | |
| 1485 | /* Record registers which might be clobbered during signal handling. |
| 1486 | Return 0 if successful. */ |
| 1487 | |
| 1488 | static int |
| 1489 | ppc_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1490 | enum gdb_signal signal) |
| 1491 | { |
| 1492 | /* See handle_rt_signal64 in arch/powerpc/kernel/signal_64.c |
| 1493 | handle_rt_signal32 in arch/powerpc/kernel/signal_32.c |
| 1494 | arch/powerpc/include/asm/ptrace.h |
| 1495 | for details. */ |
| 1496 | const int SIGNAL_FRAMESIZE = 128; |
| 1497 | const int sizeof_rt_sigframe = 1440 * 2 + 8 * 2 + 4 * 6 + 8 + 8 + 128 + 512; |
| 1498 | ULONGEST sp; |
| 1499 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1500 | int i; |
| 1501 | |
| 1502 | for (i = 3; i <= 12; i++) |
| 1503 | { |
| 1504 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + i)) |
| 1505 | return -1; |
| 1506 | } |
| 1507 | |
| 1508 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum)) |
| 1509 | return -1; |
| 1510 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum)) |
| 1511 | return -1; |
| 1512 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum)) |
| 1513 | return -1; |
| 1514 | if (record_full_arch_list_add_reg (regcache, gdbarch_pc_regnum (gdbarch))) |
| 1515 | return -1; |
| 1516 | if (record_full_arch_list_add_reg (regcache, gdbarch_sp_regnum (gdbarch))) |
| 1517 | return -1; |
| 1518 | |
| 1519 | /* Record the change in the stack. |
| 1520 | frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */ |
| 1521 | regcache_raw_read_unsigned (regcache, gdbarch_sp_regnum (gdbarch), &sp); |
| 1522 | sp -= SIGNAL_FRAMESIZE; |
| 1523 | sp -= sizeof_rt_sigframe; |
| 1524 | |
| 1525 | if (record_full_arch_list_add_mem (sp, SIGNAL_FRAMESIZE + sizeof_rt_sigframe)) |
| 1526 | return -1; |
| 1527 | |
| 1528 | if (record_full_arch_list_add_end ()) |
| 1529 | return -1; |
| 1530 | |
| 1531 | return 0; |
| 1532 | } |
| 1533 | |
| 1534 | static void |
| 1535 | ppc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc) |
| 1536 | { |
| 1537 | struct gdbarch *gdbarch = regcache->arch (); |
| 1538 | |
| 1539 | regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch), pc); |
| 1540 | |
| 1541 | /* Set special TRAP register to -1 to prevent the kernel from |
| 1542 | messing with the PC we just installed, if we happen to be |
| 1543 | within an interrupted system call that the kernel wants to |
| 1544 | restart. |
| 1545 | |
| 1546 | Note that after we return from the dummy call, the TRAP and |
| 1547 | ORIG_R3 registers will be automatically restored, and the |
| 1548 | kernel continues to restart the system call at this point. */ |
| 1549 | if (ppc_linux_trap_reg_p (gdbarch)) |
| 1550 | regcache_cooked_write_unsigned (regcache, PPC_TRAP_REGNUM, -1); |
| 1551 | } |
| 1552 | |
| 1553 | static const struct target_desc * |
| 1554 | ppc_linux_core_read_description (struct gdbarch *gdbarch, |
| 1555 | struct target_ops *target, |
| 1556 | bfd *abfd) |
| 1557 | { |
| 1558 | struct ppc_linux_features features = ppc_linux_no_features; |
| 1559 | asection *altivec = bfd_get_section_by_name (abfd, ".reg-ppc-vmx"); |
| 1560 | asection *vsx = bfd_get_section_by_name (abfd, ".reg-ppc-vsx"); |
| 1561 | asection *section = bfd_get_section_by_name (abfd, ".reg"); |
| 1562 | asection *ppr = bfd_get_section_by_name (abfd, ".reg-ppc-ppr"); |
| 1563 | asection *dscr = bfd_get_section_by_name (abfd, ".reg-ppc-dscr"); |
| 1564 | asection *tar = bfd_get_section_by_name (abfd, ".reg-ppc-tar"); |
| 1565 | asection *pmu = bfd_get_section_by_name (abfd, ".reg-ppc-pmu"); |
| 1566 | asection *htmspr = bfd_get_section_by_name (abfd, ".reg-ppc-tm-spr"); |
| 1567 | |
| 1568 | if (! section) |
| 1569 | return NULL; |
| 1570 | |
| 1571 | switch (bfd_section_size (section)) |
| 1572 | { |
| 1573 | case 48 * 4: |
| 1574 | features.wordsize = 4; |
| 1575 | break; |
| 1576 | case 48 * 8: |
| 1577 | features.wordsize = 8; |
| 1578 | break; |
| 1579 | default: |
| 1580 | return NULL; |
| 1581 | } |
| 1582 | |
| 1583 | if (altivec) |
| 1584 | features.altivec = true; |
| 1585 | |
| 1586 | if (vsx) |
| 1587 | features.vsx = true; |
| 1588 | |
| 1589 | CORE_ADDR hwcap = linux_get_hwcap (target); |
| 1590 | |
| 1591 | features.isa205 = ppc_linux_has_isa205 (hwcap); |
| 1592 | |
| 1593 | if (ppr && dscr) |
| 1594 | { |
| 1595 | features.ppr_dscr = true; |
| 1596 | |
| 1597 | /* We don't require the EBB note section to be present in the |
| 1598 | core file to select isa207 because these registers could have |
| 1599 | been unavailable when the core file was created. They will |
| 1600 | be in the tdep but will show as unavailable. */ |
| 1601 | if (tar && pmu) |
| 1602 | { |
| 1603 | features.isa207 = true; |
| 1604 | if (htmspr) |
| 1605 | features.htm = true; |
| 1606 | } |
| 1607 | } |
| 1608 | |
| 1609 | return ppc_linux_match_description (features); |
| 1610 | } |
| 1611 | |
| 1612 | |
| 1613 | /* Implementation of `gdbarch_elf_make_msymbol_special', as defined in |
| 1614 | gdbarch.h. This implementation is used for the ELFv2 ABI only. */ |
| 1615 | |
| 1616 | static void |
| 1617 | ppc_elfv2_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) |
| 1618 | { |
| 1619 | elf_symbol_type *elf_sym = (elf_symbol_type *)sym; |
| 1620 | |
| 1621 | /* If the symbol is marked as having a local entry point, set a target |
| 1622 | flag in the msymbol. We currently only support local entry point |
| 1623 | offsets of 8 bytes, which is the only entry point offset ever used |
| 1624 | by current compilers. If/when other offsets are ever used, we will |
| 1625 | have to use additional target flag bits to store them. */ |
| 1626 | switch (PPC64_LOCAL_ENTRY_OFFSET (elf_sym->internal_elf_sym.st_other)) |
| 1627 | { |
| 1628 | default: |
| 1629 | break; |
| 1630 | case 8: |
| 1631 | MSYMBOL_TARGET_FLAG_1 (msym) = 1; |
| 1632 | break; |
| 1633 | } |
| 1634 | } |
| 1635 | |
| 1636 | /* Implementation of `gdbarch_skip_entrypoint', as defined in |
| 1637 | gdbarch.h. This implementation is used for the ELFv2 ABI only. */ |
| 1638 | |
| 1639 | static CORE_ADDR |
| 1640 | ppc_elfv2_skip_entrypoint (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 1641 | { |
| 1642 | struct bound_minimal_symbol fun; |
| 1643 | int local_entry_offset = 0; |
| 1644 | |
| 1645 | fun = lookup_minimal_symbol_by_pc (pc); |
| 1646 | if (fun.minsym == NULL) |
| 1647 | return pc; |
| 1648 | |
| 1649 | /* See ppc_elfv2_elf_make_msymbol_special for how local entry point |
| 1650 | offset values are encoded. */ |
| 1651 | if (MSYMBOL_TARGET_FLAG_1 (fun.minsym)) |
| 1652 | local_entry_offset = 8; |
| 1653 | |
| 1654 | if (BMSYMBOL_VALUE_ADDRESS (fun) <= pc |
| 1655 | && pc < BMSYMBOL_VALUE_ADDRESS (fun) + local_entry_offset) |
| 1656 | return BMSYMBOL_VALUE_ADDRESS (fun) + local_entry_offset; |
| 1657 | |
| 1658 | return pc; |
| 1659 | } |
| 1660 | |
| 1661 | /* Implementation of `gdbarch_stap_is_single_operand', as defined in |
| 1662 | gdbarch.h. */ |
| 1663 | |
| 1664 | static int |
| 1665 | ppc_stap_is_single_operand (struct gdbarch *gdbarch, const char *s) |
| 1666 | { |
| 1667 | return (*s == 'i' /* Literal number. */ |
| 1668 | || (isdigit (*s) && s[1] == '(' |
| 1669 | && isdigit (s[2])) /* Displacement. */ |
| 1670 | || (*s == '(' && isdigit (s[1])) /* Register indirection. */ |
| 1671 | || isdigit (*s)); /* Register value. */ |
| 1672 | } |
| 1673 | |
| 1674 | /* Implementation of `gdbarch_stap_parse_special_token', as defined in |
| 1675 | gdbarch.h. */ |
| 1676 | |
| 1677 | static int |
| 1678 | ppc_stap_parse_special_token (struct gdbarch *gdbarch, |
| 1679 | struct stap_parse_info *p) |
| 1680 | { |
| 1681 | if (isdigit (*p->arg)) |
| 1682 | { |
| 1683 | /* This temporary pointer is needed because we have to do a lookahead. |
| 1684 | We could be dealing with a register displacement, and in such case |
| 1685 | we would not need to do anything. */ |
| 1686 | const char *s = p->arg; |
| 1687 | char *regname; |
| 1688 | int len; |
| 1689 | struct stoken str; |
| 1690 | |
| 1691 | while (isdigit (*s)) |
| 1692 | ++s; |
| 1693 | |
| 1694 | if (*s == '(') |
| 1695 | { |
| 1696 | /* It is a register displacement indeed. Returning 0 means we are |
| 1697 | deferring the treatment of this case to the generic parser. */ |
| 1698 | return 0; |
| 1699 | } |
| 1700 | |
| 1701 | len = s - p->arg; |
| 1702 | regname = (char *) alloca (len + 2); |
| 1703 | regname[0] = 'r'; |
| 1704 | |
| 1705 | strncpy (regname + 1, p->arg, len); |
| 1706 | ++len; |
| 1707 | regname[len] = '\0'; |
| 1708 | |
| 1709 | if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1) |
| 1710 | error (_("Invalid register name `%s' on expression `%s'."), |
| 1711 | regname, p->saved_arg); |
| 1712 | |
| 1713 | write_exp_elt_opcode (&p->pstate, OP_REGISTER); |
| 1714 | str.ptr = regname; |
| 1715 | str.length = len; |
| 1716 | write_exp_string (&p->pstate, str); |
| 1717 | write_exp_elt_opcode (&p->pstate, OP_REGISTER); |
| 1718 | |
| 1719 | p->arg = s; |
| 1720 | } |
| 1721 | else |
| 1722 | { |
| 1723 | /* All the other tokens should be handled correctly by the generic |
| 1724 | parser. */ |
| 1725 | return 0; |
| 1726 | } |
| 1727 | |
| 1728 | return 1; |
| 1729 | } |
| 1730 | |
| 1731 | /* Initialize linux_record_tdep if not initialized yet. |
| 1732 | WORDSIZE is 4 or 8 for 32- or 64-bit PowerPC Linux respectively. |
| 1733 | Sizes of data structures are initialized accordingly. */ |
| 1734 | |
| 1735 | static void |
| 1736 | ppc_init_linux_record_tdep (struct linux_record_tdep *record_tdep, |
| 1737 | int wordsize) |
| 1738 | { |
| 1739 | /* Simply return if it had been initialized. */ |
| 1740 | if (record_tdep->size_pointer != 0) |
| 1741 | return; |
| 1742 | |
| 1743 | /* These values are the size of the type that will be used in a system |
| 1744 | call. They are obtained from Linux Kernel source. */ |
| 1745 | |
| 1746 | if (wordsize == 8) |
| 1747 | { |
| 1748 | record_tdep->size_pointer = 8; |
| 1749 | record_tdep->size__old_kernel_stat = 32; |
| 1750 | record_tdep->size_tms = 32; |
| 1751 | record_tdep->size_loff_t = 8; |
| 1752 | record_tdep->size_flock = 32; |
| 1753 | record_tdep->size_oldold_utsname = 45; |
| 1754 | record_tdep->size_ustat = 32; |
| 1755 | record_tdep->size_old_sigaction = 32; |
| 1756 | record_tdep->size_old_sigset_t = 8; |
| 1757 | record_tdep->size_rlimit = 16; |
| 1758 | record_tdep->size_rusage = 144; |
| 1759 | record_tdep->size_timeval = 16; |
| 1760 | record_tdep->size_timezone = 8; |
| 1761 | record_tdep->size_old_gid_t = 4; |
| 1762 | record_tdep->size_old_uid_t = 4; |
| 1763 | record_tdep->size_fd_set = 128; |
| 1764 | record_tdep->size_old_dirent = 280; |
| 1765 | record_tdep->size_statfs = 120; |
| 1766 | record_tdep->size_statfs64 = 120; |
| 1767 | record_tdep->size_sockaddr = 16; |
| 1768 | record_tdep->size_int = 4; |
| 1769 | record_tdep->size_long = 8; |
| 1770 | record_tdep->size_ulong = 8; |
| 1771 | record_tdep->size_msghdr = 56; |
| 1772 | record_tdep->size_itimerval = 32; |
| 1773 | record_tdep->size_stat = 144; |
| 1774 | record_tdep->size_old_utsname = 325; |
| 1775 | record_tdep->size_sysinfo = 112; |
| 1776 | record_tdep->size_msqid_ds = 120; |
| 1777 | record_tdep->size_shmid_ds = 112; |
| 1778 | record_tdep->size_new_utsname = 390; |
| 1779 | record_tdep->size_timex = 208; |
| 1780 | record_tdep->size_mem_dqinfo = 24; |
| 1781 | record_tdep->size_if_dqblk = 72; |
| 1782 | record_tdep->size_fs_quota_stat = 80; |
| 1783 | record_tdep->size_timespec = 16; |
| 1784 | record_tdep->size_pollfd = 8; |
| 1785 | record_tdep->size_NFS_FHSIZE = 32; |
| 1786 | record_tdep->size_knfsd_fh = 132; |
| 1787 | record_tdep->size_TASK_COMM_LEN = 16; |
| 1788 | record_tdep->size_sigaction = 32; |
| 1789 | record_tdep->size_sigset_t = 8; |
| 1790 | record_tdep->size_siginfo_t = 128; |
| 1791 | record_tdep->size_cap_user_data_t = 8; |
| 1792 | record_tdep->size_stack_t = 24; |
| 1793 | record_tdep->size_off_t = 8; |
| 1794 | record_tdep->size_stat64 = 104; |
| 1795 | record_tdep->size_gid_t = 4; |
| 1796 | record_tdep->size_uid_t = 4; |
| 1797 | record_tdep->size_PAGE_SIZE = 0x10000; /* 64KB */ |
| 1798 | record_tdep->size_flock64 = 32; |
| 1799 | record_tdep->size_io_event = 32; |
| 1800 | record_tdep->size_iocb = 64; |
| 1801 | record_tdep->size_epoll_event = 16; |
| 1802 | record_tdep->size_itimerspec = 32; |
| 1803 | record_tdep->size_mq_attr = 64; |
| 1804 | record_tdep->size_termios = 44; |
| 1805 | record_tdep->size_pid_t = 4; |
| 1806 | record_tdep->size_winsize = 8; |
| 1807 | record_tdep->size_serial_struct = 72; |
| 1808 | record_tdep->size_serial_icounter_struct = 80; |
| 1809 | record_tdep->size_size_t = 8; |
| 1810 | record_tdep->size_iovec = 16; |
| 1811 | record_tdep->size_time_t = 8; |
| 1812 | } |
| 1813 | else if (wordsize == 4) |
| 1814 | { |
| 1815 | record_tdep->size_pointer = 4; |
| 1816 | record_tdep->size__old_kernel_stat = 32; |
| 1817 | record_tdep->size_tms = 16; |
| 1818 | record_tdep->size_loff_t = 8; |
| 1819 | record_tdep->size_flock = 16; |
| 1820 | record_tdep->size_oldold_utsname = 45; |
| 1821 | record_tdep->size_ustat = 20; |
| 1822 | record_tdep->size_old_sigaction = 16; |
| 1823 | record_tdep->size_old_sigset_t = 4; |
| 1824 | record_tdep->size_rlimit = 8; |
| 1825 | record_tdep->size_rusage = 72; |
| 1826 | record_tdep->size_timeval = 8; |
| 1827 | record_tdep->size_timezone = 8; |
| 1828 | record_tdep->size_old_gid_t = 4; |
| 1829 | record_tdep->size_old_uid_t = 4; |
| 1830 | record_tdep->size_fd_set = 128; |
| 1831 | record_tdep->size_old_dirent = 268; |
| 1832 | record_tdep->size_statfs = 64; |
| 1833 | record_tdep->size_statfs64 = 88; |
| 1834 | record_tdep->size_sockaddr = 16; |
| 1835 | record_tdep->size_int = 4; |
| 1836 | record_tdep->size_long = 4; |
| 1837 | record_tdep->size_ulong = 4; |
| 1838 | record_tdep->size_msghdr = 28; |
| 1839 | record_tdep->size_itimerval = 16; |
| 1840 | record_tdep->size_stat = 88; |
| 1841 | record_tdep->size_old_utsname = 325; |
| 1842 | record_tdep->size_sysinfo = 64; |
| 1843 | record_tdep->size_msqid_ds = 68; |
| 1844 | record_tdep->size_shmid_ds = 60; |
| 1845 | record_tdep->size_new_utsname = 390; |
| 1846 | record_tdep->size_timex = 128; |
| 1847 | record_tdep->size_mem_dqinfo = 24; |
| 1848 | record_tdep->size_if_dqblk = 72; |
| 1849 | record_tdep->size_fs_quota_stat = 80; |
| 1850 | record_tdep->size_timespec = 8; |
| 1851 | record_tdep->size_pollfd = 8; |
| 1852 | record_tdep->size_NFS_FHSIZE = 32; |
| 1853 | record_tdep->size_knfsd_fh = 132; |
| 1854 | record_tdep->size_TASK_COMM_LEN = 16; |
| 1855 | record_tdep->size_sigaction = 20; |
| 1856 | record_tdep->size_sigset_t = 8; |
| 1857 | record_tdep->size_siginfo_t = 128; |
| 1858 | record_tdep->size_cap_user_data_t = 4; |
| 1859 | record_tdep->size_stack_t = 12; |
| 1860 | record_tdep->size_off_t = 4; |
| 1861 | record_tdep->size_stat64 = 104; |
| 1862 | record_tdep->size_gid_t = 4; |
| 1863 | record_tdep->size_uid_t = 4; |
| 1864 | record_tdep->size_PAGE_SIZE = 0x10000; /* 64KB */ |
| 1865 | record_tdep->size_flock64 = 32; |
| 1866 | record_tdep->size_io_event = 32; |
| 1867 | record_tdep->size_iocb = 64; |
| 1868 | record_tdep->size_epoll_event = 16; |
| 1869 | record_tdep->size_itimerspec = 16; |
| 1870 | record_tdep->size_mq_attr = 32; |
| 1871 | record_tdep->size_termios = 44; |
| 1872 | record_tdep->size_pid_t = 4; |
| 1873 | record_tdep->size_winsize = 8; |
| 1874 | record_tdep->size_serial_struct = 60; |
| 1875 | record_tdep->size_serial_icounter_struct = 80; |
| 1876 | record_tdep->size_size_t = 4; |
| 1877 | record_tdep->size_iovec = 8; |
| 1878 | record_tdep->size_time_t = 4; |
| 1879 | } |
| 1880 | else |
| 1881 | internal_error (__FILE__, __LINE__, _("unexpected wordsize")); |
| 1882 | |
| 1883 | /* These values are the second argument of system call "sys_fcntl" |
| 1884 | and "sys_fcntl64". They are obtained from Linux Kernel source. */ |
| 1885 | record_tdep->fcntl_F_GETLK = 5; |
| 1886 | record_tdep->fcntl_F_GETLK64 = 12; |
| 1887 | record_tdep->fcntl_F_SETLK64 = 13; |
| 1888 | record_tdep->fcntl_F_SETLKW64 = 14; |
| 1889 | |
| 1890 | record_tdep->arg1 = PPC_R0_REGNUM + 3; |
| 1891 | record_tdep->arg2 = PPC_R0_REGNUM + 4; |
| 1892 | record_tdep->arg3 = PPC_R0_REGNUM + 5; |
| 1893 | record_tdep->arg4 = PPC_R0_REGNUM + 6; |
| 1894 | record_tdep->arg5 = PPC_R0_REGNUM + 7; |
| 1895 | record_tdep->arg6 = PPC_R0_REGNUM + 8; |
| 1896 | |
| 1897 | /* These values are the second argument of system call "sys_ioctl". |
| 1898 | They are obtained from Linux Kernel source. |
| 1899 | See arch/powerpc/include/uapi/asm/ioctls.h. */ |
| 1900 | record_tdep->ioctl_TCGETS = 0x403c7413; |
| 1901 | record_tdep->ioctl_TCSETS = 0x803c7414; |
| 1902 | record_tdep->ioctl_TCSETSW = 0x803c7415; |
| 1903 | record_tdep->ioctl_TCSETSF = 0x803c7416; |
| 1904 | record_tdep->ioctl_TCGETA = 0x40147417; |
| 1905 | record_tdep->ioctl_TCSETA = 0x80147418; |
| 1906 | record_tdep->ioctl_TCSETAW = 0x80147419; |
| 1907 | record_tdep->ioctl_TCSETAF = 0x8014741c; |
| 1908 | record_tdep->ioctl_TCSBRK = 0x2000741d; |
| 1909 | record_tdep->ioctl_TCXONC = 0x2000741e; |
| 1910 | record_tdep->ioctl_TCFLSH = 0x2000741f; |
| 1911 | record_tdep->ioctl_TIOCEXCL = 0x540c; |
| 1912 | record_tdep->ioctl_TIOCNXCL = 0x540d; |
| 1913 | record_tdep->ioctl_TIOCSCTTY = 0x540e; |
| 1914 | record_tdep->ioctl_TIOCGPGRP = 0x40047477; |
| 1915 | record_tdep->ioctl_TIOCSPGRP = 0x80047476; |
| 1916 | record_tdep->ioctl_TIOCOUTQ = 0x40047473; |
| 1917 | record_tdep->ioctl_TIOCSTI = 0x5412; |
| 1918 | record_tdep->ioctl_TIOCGWINSZ = 0x40087468; |
| 1919 | record_tdep->ioctl_TIOCSWINSZ = 0x80087467; |
| 1920 | record_tdep->ioctl_TIOCMGET = 0x5415; |
| 1921 | record_tdep->ioctl_TIOCMBIS = 0x5416; |
| 1922 | record_tdep->ioctl_TIOCMBIC = 0x5417; |
| 1923 | record_tdep->ioctl_TIOCMSET = 0x5418; |
| 1924 | record_tdep->ioctl_TIOCGSOFTCAR = 0x5419; |
| 1925 | record_tdep->ioctl_TIOCSSOFTCAR = 0x541a; |
| 1926 | record_tdep->ioctl_FIONREAD = 0x4004667f; |
| 1927 | record_tdep->ioctl_TIOCINQ = 0x4004667f; |
| 1928 | record_tdep->ioctl_TIOCLINUX = 0x541c; |
| 1929 | record_tdep->ioctl_TIOCCONS = 0x541d; |
| 1930 | record_tdep->ioctl_TIOCGSERIAL = 0x541e; |
| 1931 | record_tdep->ioctl_TIOCSSERIAL = 0x541f; |
| 1932 | record_tdep->ioctl_TIOCPKT = 0x5420; |
| 1933 | record_tdep->ioctl_FIONBIO = 0x8004667e; |
| 1934 | record_tdep->ioctl_TIOCNOTTY = 0x5422; |
| 1935 | record_tdep->ioctl_TIOCSETD = 0x5423; |
| 1936 | record_tdep->ioctl_TIOCGETD = 0x5424; |
| 1937 | record_tdep->ioctl_TCSBRKP = 0x5425; |
| 1938 | record_tdep->ioctl_TIOCSBRK = 0x5427; |
| 1939 | record_tdep->ioctl_TIOCCBRK = 0x5428; |
| 1940 | record_tdep->ioctl_TIOCGSID = 0x5429; |
| 1941 | record_tdep->ioctl_TIOCGPTN = 0x40045430; |
| 1942 | record_tdep->ioctl_TIOCSPTLCK = 0x80045431; |
| 1943 | record_tdep->ioctl_FIONCLEX = 0x20006602; |
| 1944 | record_tdep->ioctl_FIOCLEX = 0x20006601; |
| 1945 | record_tdep->ioctl_FIOASYNC = 0x8004667d; |
| 1946 | record_tdep->ioctl_TIOCSERCONFIG = 0x5453; |
| 1947 | record_tdep->ioctl_TIOCSERGWILD = 0x5454; |
| 1948 | record_tdep->ioctl_TIOCSERSWILD = 0x5455; |
| 1949 | record_tdep->ioctl_TIOCGLCKTRMIOS = 0x5456; |
| 1950 | record_tdep->ioctl_TIOCSLCKTRMIOS = 0x5457; |
| 1951 | record_tdep->ioctl_TIOCSERGSTRUCT = 0x5458; |
| 1952 | record_tdep->ioctl_TIOCSERGETLSR = 0x5459; |
| 1953 | record_tdep->ioctl_TIOCSERGETMULTI = 0x545a; |
| 1954 | record_tdep->ioctl_TIOCSERSETMULTI = 0x545b; |
| 1955 | record_tdep->ioctl_TIOCMIWAIT = 0x545c; |
| 1956 | record_tdep->ioctl_TIOCGICOUNT = 0x545d; |
| 1957 | record_tdep->ioctl_FIOQSIZE = 0x40086680; |
| 1958 | } |
| 1959 | |
| 1960 | /* Return a floating-point format for a floating-point variable of |
| 1961 | length LEN in bits. If non-NULL, NAME is the name of its type. |
| 1962 | If no suitable type is found, return NULL. */ |
| 1963 | |
| 1964 | static const struct floatformat ** |
| 1965 | ppc_floatformat_for_type (struct gdbarch *gdbarch, |
| 1966 | const char *name, int len) |
| 1967 | { |
| 1968 | if (len == 128 && name) |
| 1969 | { |
| 1970 | if (strcmp (name, "__float128") == 0 |
| 1971 | || strcmp (name, "_Float128") == 0 |
| 1972 | || strcmp (name, "_Float64x") == 0 |
| 1973 | || strcmp (name, "complex _Float128") == 0 |
| 1974 | || strcmp (name, "complex _Float64x") == 0) |
| 1975 | return floatformats_ia64_quad; |
| 1976 | |
| 1977 | if (strcmp (name, "__ibm128") == 0) |
| 1978 | return floatformats_ibm_long_double; |
| 1979 | } |
| 1980 | |
| 1981 | return default_floatformat_for_type (gdbarch, name, len); |
| 1982 | } |
| 1983 | |
| 1984 | static void |
| 1985 | ppc_linux_init_abi (struct gdbarch_info info, |
| 1986 | struct gdbarch *gdbarch) |
| 1987 | { |
| 1988 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1989 | struct tdesc_arch_data *tdesc_data = info.tdesc_data; |
| 1990 | static const char *const stap_integer_prefixes[] = { "i", NULL }; |
| 1991 | static const char *const stap_register_indirection_prefixes[] = { "(", |
| 1992 | NULL }; |
| 1993 | static const char *const stap_register_indirection_suffixes[] = { ")", |
| 1994 | NULL }; |
| 1995 | |
| 1996 | linux_init_abi (info, gdbarch); |
| 1997 | |
| 1998 | /* PPC GNU/Linux uses either 64-bit or 128-bit long doubles; where |
| 1999 | 128-bit, they can be either IBM long double or IEEE quad long double. |
| 2000 | The 64-bit long double case will be detected automatically using |
| 2001 | the size specified in debug info. We use a .gnu.attribute flag |
| 2002 | to distinguish between the IBM long double and IEEE quad cases. */ |
| 2003 | set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT); |
| 2004 | if (tdep->long_double_abi == POWERPC_LONG_DOUBLE_IEEE128) |
| 2005 | set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); |
| 2006 | else |
| 2007 | set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double); |
| 2008 | |
| 2009 | /* Support for floating-point data type variants. */ |
| 2010 | set_gdbarch_floatformat_for_type (gdbarch, ppc_floatformat_for_type); |
| 2011 | |
| 2012 | /* Handle inferior calls during interrupted system calls. */ |
| 2013 | set_gdbarch_write_pc (gdbarch, ppc_linux_write_pc); |
| 2014 | |
| 2015 | /* Get the syscall number from the arch's register. */ |
| 2016 | set_gdbarch_get_syscall_number (gdbarch, ppc_linux_get_syscall_number); |
| 2017 | |
| 2018 | /* SystemTap functions. */ |
| 2019 | set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes); |
| 2020 | set_gdbarch_stap_register_indirection_prefixes (gdbarch, |
| 2021 | stap_register_indirection_prefixes); |
| 2022 | set_gdbarch_stap_register_indirection_suffixes (gdbarch, |
| 2023 | stap_register_indirection_suffixes); |
| 2024 | set_gdbarch_stap_gdb_register_prefix (gdbarch, "r"); |
| 2025 | set_gdbarch_stap_is_single_operand (gdbarch, ppc_stap_is_single_operand); |
| 2026 | set_gdbarch_stap_parse_special_token (gdbarch, |
| 2027 | ppc_stap_parse_special_token); |
| 2028 | |
| 2029 | if (tdep->wordsize == 4) |
| 2030 | { |
| 2031 | /* Until November 2001, gcc did not comply with the 32 bit SysV |
| 2032 | R4 ABI requirement that structures less than or equal to 8 |
| 2033 | bytes should be returned in registers. Instead GCC was using |
| 2034 | the AIX/PowerOpen ABI - everything returned in memory |
| 2035 | (well ignoring vectors that is). When this was corrected, it |
| 2036 | wasn't fixed for GNU/Linux native platform. Use the |
| 2037 | PowerOpen struct convention. */ |
| 2038 | set_gdbarch_return_value (gdbarch, ppc_linux_return_value); |
| 2039 | |
| 2040 | set_gdbarch_memory_remove_breakpoint (gdbarch, |
| 2041 | ppc_linux_memory_remove_breakpoint); |
| 2042 | |
| 2043 | /* Shared library handling. */ |
| 2044 | set_gdbarch_skip_trampoline_code (gdbarch, ppc_skip_trampoline_code); |
| 2045 | set_solib_svr4_fetch_link_map_offsets |
| 2046 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); |
| 2047 | |
| 2048 | /* Setting the correct XML syscall filename. */ |
| 2049 | set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC); |
| 2050 | |
| 2051 | /* Trampolines. */ |
| 2052 | tramp_frame_prepend_unwinder (gdbarch, |
| 2053 | &ppc32_linux_sigaction_tramp_frame); |
| 2054 | tramp_frame_prepend_unwinder (gdbarch, |
| 2055 | &ppc32_linux_sighandler_tramp_frame); |
| 2056 | |
| 2057 | /* BFD target for core files. */ |
| 2058 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 2059 | set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpcle"); |
| 2060 | else |
| 2061 | set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpc"); |
| 2062 | |
| 2063 | if (powerpc_so_ops.in_dynsym_resolve_code == NULL) |
| 2064 | { |
| 2065 | powerpc_so_ops = svr4_so_ops; |
| 2066 | /* Override dynamic resolve function. */ |
| 2067 | powerpc_so_ops.in_dynsym_resolve_code = |
| 2068 | powerpc_linux_in_dynsym_resolve_code; |
| 2069 | } |
| 2070 | set_solib_ops (gdbarch, &powerpc_so_ops); |
| 2071 | |
| 2072 | set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); |
| 2073 | } |
| 2074 | |
| 2075 | if (tdep->wordsize == 8) |
| 2076 | { |
| 2077 | if (tdep->elf_abi == POWERPC_ELF_V1) |
| 2078 | { |
| 2079 | /* Handle PPC GNU/Linux 64-bit function pointers (which are really |
| 2080 | function descriptors). */ |
| 2081 | set_gdbarch_convert_from_func_ptr_addr |
| 2082 | (gdbarch, ppc64_convert_from_func_ptr_addr); |
| 2083 | |
| 2084 | set_gdbarch_elf_make_msymbol_special |
| 2085 | (gdbarch, ppc64_elf_make_msymbol_special); |
| 2086 | } |
| 2087 | else |
| 2088 | { |
| 2089 | set_gdbarch_elf_make_msymbol_special |
| 2090 | (gdbarch, ppc_elfv2_elf_make_msymbol_special); |
| 2091 | |
| 2092 | set_gdbarch_skip_entrypoint (gdbarch, ppc_elfv2_skip_entrypoint); |
| 2093 | } |
| 2094 | |
| 2095 | /* Shared library handling. */ |
| 2096 | set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code); |
| 2097 | set_solib_svr4_fetch_link_map_offsets |
| 2098 | (gdbarch, svr4_lp64_fetch_link_map_offsets); |
| 2099 | |
| 2100 | /* Setting the correct XML syscall filename. */ |
| 2101 | set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC64); |
| 2102 | |
| 2103 | /* Trampolines. */ |
| 2104 | tramp_frame_prepend_unwinder (gdbarch, |
| 2105 | &ppc64_linux_sigaction_tramp_frame); |
| 2106 | tramp_frame_prepend_unwinder (gdbarch, |
| 2107 | &ppc64_linux_sighandler_tramp_frame); |
| 2108 | |
| 2109 | /* BFD target for core files. */ |
| 2110 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 2111 | set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpcle"); |
| 2112 | else |
| 2113 | set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc"); |
| 2114 | } |
| 2115 | |
| 2116 | set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description); |
| 2117 | set_gdbarch_iterate_over_regset_sections (gdbarch, |
| 2118 | ppc_linux_iterate_over_regset_sections); |
| 2119 | |
| 2120 | /* Enable TLS support. */ |
| 2121 | set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| 2122 | svr4_fetch_objfile_link_map); |
| 2123 | |
| 2124 | if (tdesc_data) |
| 2125 | { |
| 2126 | const struct tdesc_feature *feature; |
| 2127 | |
| 2128 | /* If we have target-described registers, then we can safely |
| 2129 | reserve a number for PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM |
| 2130 | (whether they are described or not). */ |
| 2131 | gdb_assert (gdbarch_num_regs (gdbarch) <= PPC_ORIG_R3_REGNUM); |
| 2132 | set_gdbarch_num_regs (gdbarch, PPC_TRAP_REGNUM + 1); |
| 2133 | |
| 2134 | /* If they are present, then assign them to the reserved number. */ |
| 2135 | feature = tdesc_find_feature (info.target_desc, |
| 2136 | "org.gnu.gdb.power.linux"); |
| 2137 | if (feature != NULL) |
| 2138 | { |
| 2139 | tdesc_numbered_register (feature, tdesc_data, |
| 2140 | PPC_ORIG_R3_REGNUM, "orig_r3"); |
| 2141 | tdesc_numbered_register (feature, tdesc_data, |
| 2142 | PPC_TRAP_REGNUM, "trap"); |
| 2143 | } |
| 2144 | } |
| 2145 | |
| 2146 | set_gdbarch_displaced_step_location (gdbarch, |
| 2147 | linux_displaced_step_location); |
| 2148 | |
| 2149 | /* Support reverse debugging. */ |
| 2150 | set_gdbarch_process_record (gdbarch, ppc_process_record); |
| 2151 | set_gdbarch_process_record_signal (gdbarch, ppc_linux_record_signal); |
| 2152 | tdep->ppc_syscall_record = ppc_linux_syscall_record; |
| 2153 | |
| 2154 | ppc_init_linux_record_tdep (&ppc_linux_record_tdep, 4); |
| 2155 | ppc_init_linux_record_tdep (&ppc64_linux_record_tdep, 8); |
| 2156 | } |
| 2157 | |
| 2158 | void |
| 2159 | _initialize_ppc_linux_tdep (void) |
| 2160 | { |
| 2161 | /* Register for all sub-families of the POWER/PowerPC: 32-bit and |
| 2162 | 64-bit PowerPC, and the older rs6k. */ |
| 2163 | gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_LINUX, |
| 2164 | ppc_linux_init_abi); |
| 2165 | gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64, GDB_OSABI_LINUX, |
| 2166 | ppc_linux_init_abi); |
| 2167 | gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX, |
| 2168 | ppc_linux_init_abi); |
| 2169 | |
| 2170 | /* Initialize the Linux target descriptions. */ |
| 2171 | initialize_tdesc_powerpc_32l (); |
| 2172 | initialize_tdesc_powerpc_altivec32l (); |
| 2173 | initialize_tdesc_powerpc_vsx32l (); |
| 2174 | initialize_tdesc_powerpc_isa205_32l (); |
| 2175 | initialize_tdesc_powerpc_isa205_altivec32l (); |
| 2176 | initialize_tdesc_powerpc_isa205_vsx32l (); |
| 2177 | initialize_tdesc_powerpc_isa205_ppr_dscr_vsx32l (); |
| 2178 | initialize_tdesc_powerpc_isa207_vsx32l (); |
| 2179 | initialize_tdesc_powerpc_isa207_htm_vsx32l (); |
| 2180 | initialize_tdesc_powerpc_64l (); |
| 2181 | initialize_tdesc_powerpc_altivec64l (); |
| 2182 | initialize_tdesc_powerpc_vsx64l (); |
| 2183 | initialize_tdesc_powerpc_isa205_64l (); |
| 2184 | initialize_tdesc_powerpc_isa205_altivec64l (); |
| 2185 | initialize_tdesc_powerpc_isa205_vsx64l (); |
| 2186 | initialize_tdesc_powerpc_isa205_ppr_dscr_vsx64l (); |
| 2187 | initialize_tdesc_powerpc_isa207_vsx64l (); |
| 2188 | initialize_tdesc_powerpc_isa207_htm_vsx64l (); |
| 2189 | initialize_tdesc_powerpc_e500l (); |
| 2190 | } |