| 1 | /* Target-dependent code for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2018 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-spu.h" |
| 35 | #include "solib.h" |
| 36 | #include "solist.h" |
| 37 | #include "ppc-tdep.h" |
| 38 | #include "ppc64-tdep.h" |
| 39 | #include "ppc-linux-tdep.h" |
| 40 | #include "arch/ppc-linux-common.h" |
| 41 | #include "arch/ppc-linux-tdesc.h" |
| 42 | #include "glibc-tdep.h" |
| 43 | #include "trad-frame.h" |
| 44 | #include "frame-unwind.h" |
| 45 | #include "tramp-frame.h" |
| 46 | #include "observable.h" |
| 47 | #include "auxv.h" |
| 48 | #include "elf/common.h" |
| 49 | #include "elf/ppc64.h" |
| 50 | #include "arch-utils.h" |
| 51 | #include "spu-tdep.h" |
| 52 | #include "xml-syscall.h" |
| 53 | #include "linux-tdep.h" |
| 54 | #include "linux-record.h" |
| 55 | #include "record-full.h" |
| 56 | #include "infrun.h" |
| 57 | |
| 58 | #include "stap-probe.h" |
| 59 | #include "ax.h" |
| 60 | #include "ax-gdb.h" |
| 61 | #include "cli/cli-utils.h" |
| 62 | #include "parser-defs.h" |
| 63 | #include "user-regs.h" |
| 64 | #include <ctype.h> |
| 65 | #include "elf-bfd.h" |
| 66 | |
| 67 | #include "features/rs6000/powerpc-32l.c" |
| 68 | #include "features/rs6000/powerpc-altivec32l.c" |
| 69 | #include "features/rs6000/powerpc-cell32l.c" |
| 70 | #include "features/rs6000/powerpc-vsx32l.c" |
| 71 | #include "features/rs6000/powerpc-isa205-32l.c" |
| 72 | #include "features/rs6000/powerpc-isa205-altivec32l.c" |
| 73 | #include "features/rs6000/powerpc-isa205-vsx32l.c" |
| 74 | #include "features/rs6000/powerpc-64l.c" |
| 75 | #include "features/rs6000/powerpc-altivec64l.c" |
| 76 | #include "features/rs6000/powerpc-cell64l.c" |
| 77 | #include "features/rs6000/powerpc-vsx64l.c" |
| 78 | #include "features/rs6000/powerpc-isa205-64l.c" |
| 79 | #include "features/rs6000/powerpc-isa205-altivec64l.c" |
| 80 | #include "features/rs6000/powerpc-isa205-vsx64l.c" |
| 81 | #include "features/rs6000/powerpc-e500l.c" |
| 82 | |
| 83 | /* Shared library operations for PowerPC-Linux. */ |
| 84 | static struct target_so_ops powerpc_so_ops; |
| 85 | |
| 86 | /* The syscall's XML filename for PPC and PPC64. */ |
| 87 | #define XML_SYSCALL_FILENAME_PPC "syscalls/ppc-linux.xml" |
| 88 | #define XML_SYSCALL_FILENAME_PPC64 "syscalls/ppc64-linux.xml" |
| 89 | |
| 90 | /* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint |
| 91 | in much the same fashion as memory_remove_breakpoint in mem-break.c, |
| 92 | but is careful not to write back the previous contents if the code |
| 93 | in question has changed in between inserting the breakpoint and |
| 94 | removing it. |
| 95 | |
| 96 | Here is the problem that we're trying to solve... |
| 97 | |
| 98 | Once upon a time, before introducing this function to remove |
| 99 | breakpoints from the inferior, setting a breakpoint on a shared |
| 100 | library function prior to running the program would not work |
| 101 | properly. In order to understand the problem, it is first |
| 102 | necessary to understand a little bit about dynamic linking on |
| 103 | this platform. |
| 104 | |
| 105 | A call to a shared library function is accomplished via a bl |
| 106 | (branch-and-link) instruction whose branch target is an entry |
| 107 | in the procedure linkage table (PLT). The PLT in the object |
| 108 | file is uninitialized. To gdb, prior to running the program, the |
| 109 | entries in the PLT are all zeros. |
| 110 | |
| 111 | Once the program starts running, the shared libraries are loaded |
| 112 | and the procedure linkage table is initialized, but the entries in |
| 113 | the table are not (necessarily) resolved. Once a function is |
| 114 | actually called, the code in the PLT is hit and the function is |
| 115 | resolved. In order to better illustrate this, an example is in |
| 116 | order; the following example is from the gdb testsuite. |
| 117 | |
| 118 | We start the program shmain. |
| 119 | |
| 120 | [kev@arroyo testsuite]$ ../gdb gdb.base/shmain |
| 121 | [...] |
| 122 | |
| 123 | We place two breakpoints, one on shr1 and the other on main. |
| 124 | |
| 125 | (gdb) b shr1 |
| 126 | Breakpoint 1 at 0x100409d4 |
| 127 | (gdb) b main |
| 128 | Breakpoint 2 at 0x100006a0: file gdb.base/shmain.c, line 44. |
| 129 | |
| 130 | Examine the instruction (and the immediatly following instruction) |
| 131 | upon which the breakpoint was placed. Note that the PLT entry |
| 132 | for shr1 contains zeros. |
| 133 | |
| 134 | (gdb) x/2i 0x100409d4 |
| 135 | 0x100409d4 <shr1>: .long 0x0 |
| 136 | 0x100409d8 <shr1+4>: .long 0x0 |
| 137 | |
| 138 | Now run 'til main. |
| 139 | |
| 140 | (gdb) r |
| 141 | Starting program: gdb.base/shmain |
| 142 | Breakpoint 1 at 0xffaf790: file gdb.base/shr1.c, line 19. |
| 143 | |
| 144 | Breakpoint 2, main () |
| 145 | at gdb.base/shmain.c:44 |
| 146 | 44 g = 1; |
| 147 | |
| 148 | Examine the PLT again. Note that the loading of the shared |
| 149 | library has initialized the PLT to code which loads a constant |
| 150 | (which I think is an index into the GOT) into r11 and then |
| 151 | branchs a short distance to the code which actually does the |
| 152 | resolving. |
| 153 | |
| 154 | (gdb) x/2i 0x100409d4 |
| 155 | 0x100409d4 <shr1>: li r11,4 |
| 156 | 0x100409d8 <shr1+4>: b 0x10040984 <sg+4> |
| 157 | (gdb) c |
| 158 | Continuing. |
| 159 | |
| 160 | Breakpoint 1, shr1 (x=1) |
| 161 | at gdb.base/shr1.c:19 |
| 162 | 19 l = 1; |
| 163 | |
| 164 | Now we've hit the breakpoint at shr1. (The breakpoint was |
| 165 | reset from the PLT entry to the actual shr1 function after the |
| 166 | shared library was loaded.) Note that the PLT entry has been |
| 167 | resolved to contain a branch that takes us directly to shr1. |
| 168 | (The real one, not the PLT entry.) |
| 169 | |
| 170 | (gdb) x/2i 0x100409d4 |
| 171 | 0x100409d4 <shr1>: b 0xffaf76c <shr1> |
| 172 | 0x100409d8 <shr1+4>: b 0x10040984 <sg+4> |
| 173 | |
| 174 | The thing to note here is that the PLT entry for shr1 has been |
| 175 | changed twice. |
| 176 | |
| 177 | Now the problem should be obvious. GDB places a breakpoint (a |
| 178 | trap instruction) on the zero value of the PLT entry for shr1. |
| 179 | Later on, after the shared library had been loaded and the PLT |
| 180 | initialized, GDB gets a signal indicating this fact and attempts |
| 181 | (as it always does when it stops) to remove all the breakpoints. |
| 182 | |
| 183 | The breakpoint removal was causing the former contents (a zero |
| 184 | word) to be written back to the now initialized PLT entry thus |
| 185 | destroying a portion of the initialization that had occurred only a |
| 186 | short time ago. When execution continued, the zero word would be |
| 187 | executed as an instruction an illegal instruction trap was |
| 188 | generated instead. (0 is not a legal instruction.) |
| 189 | |
| 190 | The fix for this problem was fairly straightforward. The function |
| 191 | memory_remove_breakpoint from mem-break.c was copied to this file, |
| 192 | modified slightly, and renamed to ppc_linux_memory_remove_breakpoint. |
| 193 | In tm-linux.h, MEMORY_REMOVE_BREAKPOINT is defined to call this new |
| 194 | function. |
| 195 | |
| 196 | The differences between ppc_linux_memory_remove_breakpoint () and |
| 197 | memory_remove_breakpoint () are minor. All that the former does |
| 198 | that the latter does not is check to make sure that the breakpoint |
| 199 | location actually contains a breakpoint (trap instruction) prior |
| 200 | to attempting to write back the old contents. If it does contain |
| 201 | a trap instruction, we allow the old contents to be written back. |
| 202 | Otherwise, we silently do nothing. |
| 203 | |
| 204 | The big question is whether memory_remove_breakpoint () should be |
| 205 | changed to have the same functionality. The downside is that more |
| 206 | traffic is generated for remote targets since we'll have an extra |
| 207 | fetch of a memory word each time a breakpoint is removed. |
| 208 | |
| 209 | For the time being, we'll leave this self-modifying-code-friendly |
| 210 | version in ppc-linux-tdep.c, but it ought to be migrated somewhere |
| 211 | else in the event that some other platform has similar needs with |
| 212 | regard to removing breakpoints in some potentially self modifying |
| 213 | code. */ |
| 214 | static int |
| 215 | ppc_linux_memory_remove_breakpoint (struct gdbarch *gdbarch, |
| 216 | struct bp_target_info *bp_tgt) |
| 217 | { |
| 218 | CORE_ADDR addr = bp_tgt->reqstd_address; |
| 219 | const unsigned char *bp; |
| 220 | int val; |
| 221 | int bplen; |
| 222 | gdb_byte old_contents[BREAKPOINT_MAX]; |
| 223 | |
| 224 | /* Determine appropriate breakpoint contents and size for this address. */ |
| 225 | bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen); |
| 226 | |
| 227 | /* Make sure we see the memory breakpoints. */ |
| 228 | scoped_restore restore_memory |
| 229 | = make_scoped_restore_show_memory_breakpoints (1); |
| 230 | val = target_read_memory (addr, old_contents, bplen); |
| 231 | |
| 232 | /* If our breakpoint is no longer at the address, this means that the |
| 233 | program modified the code on us, so it is wrong to put back the |
| 234 | old value. */ |
| 235 | if (val == 0 && memcmp (bp, old_contents, bplen) == 0) |
| 236 | val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen); |
| 237 | |
| 238 | return val; |
| 239 | } |
| 240 | |
| 241 | /* For historic reasons, PPC 32 GNU/Linux follows PowerOpen rather |
| 242 | than the 32 bit SYSV R4 ABI structure return convention - all |
| 243 | structures, no matter their size, are put in memory. Vectors, |
| 244 | which were added later, do get returned in a register though. */ |
| 245 | |
| 246 | static enum return_value_convention |
| 247 | ppc_linux_return_value (struct gdbarch *gdbarch, struct value *function, |
| 248 | struct type *valtype, struct regcache *regcache, |
| 249 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 250 | { |
| 251 | if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT |
| 252 | || TYPE_CODE (valtype) == TYPE_CODE_UNION) |
| 253 | && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8) |
| 254 | && TYPE_VECTOR (valtype))) |
| 255 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 256 | else |
| 257 | return ppc_sysv_abi_return_value (gdbarch, function, valtype, regcache, |
| 258 | readbuf, writebuf); |
| 259 | } |
| 260 | |
| 261 | /* PLT stub in an executable. */ |
| 262 | static const struct ppc_insn_pattern powerpc32_plt_stub[] = |
| 263 | { |
| 264 | { 0xffff0000, 0x3d600000, 0 }, /* lis r11, xxxx */ |
| 265 | { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */ |
| 266 | { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */ |
| 267 | { 0xffffffff, 0x4e800420, 0 }, /* bctr */ |
| 268 | { 0, 0, 0 } |
| 269 | }; |
| 270 | |
| 271 | /* PLT stubs in a shared library or PIE. |
| 272 | The first variant is used when the PLT entry is within +/-32k of |
| 273 | the GOT pointer (r30). */ |
| 274 | static const struct ppc_insn_pattern powerpc32_plt_stub_so_1[] = |
| 275 | { |
| 276 | { 0xffff0000, 0x817e0000, 0 }, /* lwz r11, xxxx(r30) */ |
| 277 | { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */ |
| 278 | { 0xffffffff, 0x4e800420, 0 }, /* bctr */ |
| 279 | { 0, 0, 0 } |
| 280 | }; |
| 281 | |
| 282 | /* The second variant is used when the PLT entry is more than +/-32k |
| 283 | from the GOT pointer (r30). */ |
| 284 | static const struct ppc_insn_pattern powerpc32_plt_stub_so_2[] = |
| 285 | { |
| 286 | { 0xffff0000, 0x3d7e0000, 0 }, /* addis r11, r30, xxxx */ |
| 287 | { 0xffff0000, 0x816b0000, 0 }, /* lwz r11, xxxx(r11) */ |
| 288 | { 0xffffffff, 0x7d6903a6, 0 }, /* mtctr r11 */ |
| 289 | { 0xffffffff, 0x4e800420, 0 }, /* bctr */ |
| 290 | { 0, 0, 0 } |
| 291 | }; |
| 292 | |
| 293 | /* The max number of insns we check using ppc_insns_match_pattern. */ |
| 294 | #define POWERPC32_PLT_CHECK_LEN (ARRAY_SIZE (powerpc32_plt_stub) - 1) |
| 295 | |
| 296 | /* Check if PC is in PLT stub. For non-secure PLT, stub is in .plt |
| 297 | section. For secure PLT, stub is in .text and we need to check |
| 298 | instruction patterns. */ |
| 299 | |
| 300 | static int |
| 301 | powerpc_linux_in_dynsym_resolve_code (CORE_ADDR pc) |
| 302 | { |
| 303 | struct bound_minimal_symbol sym; |
| 304 | |
| 305 | /* Check whether PC is in the dynamic linker. This also checks |
| 306 | whether it is in the .plt section, used by non-PIC executables. */ |
| 307 | if (svr4_in_dynsym_resolve_code (pc)) |
| 308 | return 1; |
| 309 | |
| 310 | /* Check if we are in the resolver. */ |
| 311 | sym = lookup_minimal_symbol_by_pc (pc); |
| 312 | if (sym.minsym != NULL |
| 313 | && (strcmp (MSYMBOL_LINKAGE_NAME (sym.minsym), "__glink") == 0 |
| 314 | || strcmp (MSYMBOL_LINKAGE_NAME (sym.minsym), |
| 315 | "__glink_PLTresolve") == 0)) |
| 316 | return 1; |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | /* Follow PLT stub to actual routine. |
| 322 | |
| 323 | When the execution direction is EXEC_REVERSE, scan backward to |
| 324 | check whether we are in the middle of a PLT stub. Currently, |
| 325 | we only look-behind at most 4 instructions (the max length of a PLT |
| 326 | stub sequence. */ |
| 327 | |
| 328 | static CORE_ADDR |
| 329 | ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
| 330 | { |
| 331 | unsigned int insnbuf[POWERPC32_PLT_CHECK_LEN]; |
| 332 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 333 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 334 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 335 | CORE_ADDR target = 0; |
| 336 | int scan_limit, i; |
| 337 | |
| 338 | scan_limit = 1; |
| 339 | /* When reverse-debugging, scan backward to check whether we are |
| 340 | in the middle of trampoline code. */ |
| 341 | if (execution_direction == EXEC_REVERSE) |
| 342 | scan_limit = 4; /* At most 4 instructions. */ |
| 343 | |
| 344 | for (i = 0; i < scan_limit; i++) |
| 345 | { |
| 346 | if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf)) |
| 347 | { |
| 348 | /* Calculate PLT entry address from |
| 349 | lis r11, xxxx |
| 350 | lwz r11, xxxx(r11). */ |
| 351 | target = ((ppc_insn_d_field (insnbuf[0]) << 16) |
| 352 | + ppc_insn_d_field (insnbuf[1])); |
| 353 | } |
| 354 | else if (i < ARRAY_SIZE (powerpc32_plt_stub_so_1) - 1 |
| 355 | && ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_1, |
| 356 | insnbuf)) |
| 357 | { |
| 358 | /* Calculate PLT entry address from |
| 359 | lwz r11, xxxx(r30). */ |
| 360 | target = (ppc_insn_d_field (insnbuf[0]) |
| 361 | + get_frame_register_unsigned (frame, |
| 362 | tdep->ppc_gp0_regnum + 30)); |
| 363 | } |
| 364 | else if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so_2, |
| 365 | insnbuf)) |
| 366 | { |
| 367 | /* Calculate PLT entry address from |
| 368 | addis r11, r30, xxxx |
| 369 | lwz r11, xxxx(r11). */ |
| 370 | target = ((ppc_insn_d_field (insnbuf[0]) << 16) |
| 371 | + ppc_insn_d_field (insnbuf[1]) |
| 372 | + get_frame_register_unsigned (frame, |
| 373 | tdep->ppc_gp0_regnum + 30)); |
| 374 | } |
| 375 | else |
| 376 | { |
| 377 | /* Scan backward one more instruction if it doesn't match. */ |
| 378 | pc -= 4; |
| 379 | continue; |
| 380 | } |
| 381 | |
| 382 | target = read_memory_unsigned_integer (target, 4, byte_order); |
| 383 | return target; |
| 384 | } |
| 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | /* Wrappers to handle Linux-only registers. */ |
| 390 | |
| 391 | static void |
| 392 | ppc_linux_supply_gregset (const struct regset *regset, |
| 393 | struct regcache *regcache, |
| 394 | int regnum, const void *gregs, size_t len) |
| 395 | { |
| 396 | const struct ppc_reg_offsets *offsets |
| 397 | = (const struct ppc_reg_offsets *) regset->regmap; |
| 398 | |
| 399 | ppc_supply_gregset (regset, regcache, regnum, gregs, len); |
| 400 | |
| 401 | if (ppc_linux_trap_reg_p (regcache->arch ())) |
| 402 | { |
| 403 | /* "orig_r3" is stored 2 slots after "pc". */ |
| 404 | if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM) |
| 405 | ppc_supply_reg (regcache, PPC_ORIG_R3_REGNUM, (const gdb_byte *) gregs, |
| 406 | offsets->pc_offset + 2 * offsets->gpr_size, |
| 407 | offsets->gpr_size); |
| 408 | |
| 409 | /* "trap" is stored 8 slots after "pc". */ |
| 410 | if (regnum == -1 || regnum == PPC_TRAP_REGNUM) |
| 411 | ppc_supply_reg (regcache, PPC_TRAP_REGNUM, (const gdb_byte *) gregs, |
| 412 | offsets->pc_offset + 8 * offsets->gpr_size, |
| 413 | offsets->gpr_size); |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | static void |
| 418 | ppc_linux_collect_gregset (const struct regset *regset, |
| 419 | const struct regcache *regcache, |
| 420 | int regnum, void *gregs, size_t len) |
| 421 | { |
| 422 | const struct ppc_reg_offsets *offsets |
| 423 | = (const struct ppc_reg_offsets *) regset->regmap; |
| 424 | |
| 425 | /* Clear areas in the linux gregset not written elsewhere. */ |
| 426 | if (regnum == -1) |
| 427 | memset (gregs, 0, len); |
| 428 | |
| 429 | ppc_collect_gregset (regset, regcache, regnum, gregs, len); |
| 430 | |
| 431 | if (ppc_linux_trap_reg_p (regcache->arch ())) |
| 432 | { |
| 433 | /* "orig_r3" is stored 2 slots after "pc". */ |
| 434 | if (regnum == -1 || regnum == PPC_ORIG_R3_REGNUM) |
| 435 | ppc_collect_reg (regcache, PPC_ORIG_R3_REGNUM, (gdb_byte *) gregs, |
| 436 | offsets->pc_offset + 2 * offsets->gpr_size, |
| 437 | offsets->gpr_size); |
| 438 | |
| 439 | /* "trap" is stored 8 slots after "pc". */ |
| 440 | if (regnum == -1 || regnum == PPC_TRAP_REGNUM) |
| 441 | ppc_collect_reg (regcache, PPC_TRAP_REGNUM, (gdb_byte *) gregs, |
| 442 | offsets->pc_offset + 8 * offsets->gpr_size, |
| 443 | offsets->gpr_size); |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | static void |
| 448 | ppc_linux_collect_vrregset (const struct regset *regset, |
| 449 | const struct regcache *regcache, |
| 450 | int regnum, void *buf, size_t len) |
| 451 | { |
| 452 | gdb_byte *vrregs = (gdb_byte *) buf; |
| 453 | |
| 454 | /* Zero-pad the unused bytes in the fields for vscr and vrsave |
| 455 | in case they get displayed somewhere (e.g. in core files). */ |
| 456 | if (regnum == PPC_VSCR_REGNUM || regnum == -1) |
| 457 | memset (&vrregs[32 * 16], 0, 16); |
| 458 | |
| 459 | if (regnum == PPC_VRSAVE_REGNUM || regnum == -1) |
| 460 | memset (&vrregs[33 * 16], 0, 16); |
| 461 | |
| 462 | regcache_collect_regset (regset, regcache, regnum, buf, len); |
| 463 | } |
| 464 | |
| 465 | /* Regset descriptions. */ |
| 466 | static const struct ppc_reg_offsets ppc32_linux_reg_offsets = |
| 467 | { |
| 468 | /* General-purpose registers. */ |
| 469 | /* .r0_offset = */ 0, |
| 470 | /* .gpr_size = */ 4, |
| 471 | /* .xr_size = */ 4, |
| 472 | /* .pc_offset = */ 128, |
| 473 | /* .ps_offset = */ 132, |
| 474 | /* .cr_offset = */ 152, |
| 475 | /* .lr_offset = */ 144, |
| 476 | /* .ctr_offset = */ 140, |
| 477 | /* .xer_offset = */ 148, |
| 478 | /* .mq_offset = */ 156, |
| 479 | |
| 480 | /* Floating-point registers. */ |
| 481 | /* .f0_offset = */ 0, |
| 482 | /* .fpscr_offset = */ 256, |
| 483 | /* .fpscr_size = */ 8 |
| 484 | }; |
| 485 | |
| 486 | static const struct ppc_reg_offsets ppc64_linux_reg_offsets = |
| 487 | { |
| 488 | /* General-purpose registers. */ |
| 489 | /* .r0_offset = */ 0, |
| 490 | /* .gpr_size = */ 8, |
| 491 | /* .xr_size = */ 8, |
| 492 | /* .pc_offset = */ 256, |
| 493 | /* .ps_offset = */ 264, |
| 494 | /* .cr_offset = */ 304, |
| 495 | /* .lr_offset = */ 288, |
| 496 | /* .ctr_offset = */ 280, |
| 497 | /* .xer_offset = */ 296, |
| 498 | /* .mq_offset = */ 312, |
| 499 | |
| 500 | /* Floating-point registers. */ |
| 501 | /* .f0_offset = */ 0, |
| 502 | /* .fpscr_offset = */ 256, |
| 503 | /* .fpscr_size = */ 8 |
| 504 | }; |
| 505 | |
| 506 | static const struct regset ppc32_linux_gregset = { |
| 507 | &ppc32_linux_reg_offsets, |
| 508 | ppc_linux_supply_gregset, |
| 509 | ppc_linux_collect_gregset |
| 510 | }; |
| 511 | |
| 512 | static const struct regset ppc64_linux_gregset = { |
| 513 | &ppc64_linux_reg_offsets, |
| 514 | ppc_linux_supply_gregset, |
| 515 | ppc_linux_collect_gregset |
| 516 | }; |
| 517 | |
| 518 | static const struct regset ppc32_linux_fpregset = { |
| 519 | &ppc32_linux_reg_offsets, |
| 520 | ppc_supply_fpregset, |
| 521 | ppc_collect_fpregset |
| 522 | }; |
| 523 | |
| 524 | static const struct regcache_map_entry ppc32_le_linux_vrregmap[] = |
| 525 | { |
| 526 | { 32, PPC_VR0_REGNUM, 16 }, |
| 527 | { 1, PPC_VSCR_REGNUM, 4 }, |
| 528 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 529 | { 1, PPC_VRSAVE_REGNUM, 4 }, |
| 530 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 531 | { 0 } |
| 532 | }; |
| 533 | |
| 534 | static const struct regcache_map_entry ppc32_be_linux_vrregmap[] = |
| 535 | { |
| 536 | { 32, PPC_VR0_REGNUM, 16 }, |
| 537 | { 1, REGCACHE_MAP_SKIP, 12}, |
| 538 | { 1, PPC_VSCR_REGNUM, 4 }, |
| 539 | { 1, PPC_VRSAVE_REGNUM, 4 }, |
| 540 | { 1, REGCACHE_MAP_SKIP, 12 }, |
| 541 | { 0 } |
| 542 | }; |
| 543 | |
| 544 | static const struct regset ppc32_le_linux_vrregset = { |
| 545 | ppc32_le_linux_vrregmap, |
| 546 | regcache_supply_regset, |
| 547 | ppc_linux_collect_vrregset |
| 548 | }; |
| 549 | |
| 550 | static const struct regset ppc32_be_linux_vrregset = { |
| 551 | ppc32_be_linux_vrregmap, |
| 552 | regcache_supply_regset, |
| 553 | ppc_linux_collect_vrregset |
| 554 | }; |
| 555 | |
| 556 | static const struct regcache_map_entry ppc32_linux_vsxregmap[] = |
| 557 | { |
| 558 | { 32, PPC_VSR0_UPPER_REGNUM, 8 }, |
| 559 | { 0 } |
| 560 | }; |
| 561 | |
| 562 | static const struct regset ppc32_linux_vsxregset = { |
| 563 | ppc32_linux_vsxregmap, |
| 564 | regcache_supply_regset, |
| 565 | regcache_collect_regset |
| 566 | }; |
| 567 | |
| 568 | const struct regset * |
| 569 | ppc_linux_gregset (int wordsize) |
| 570 | { |
| 571 | return wordsize == 8 ? &ppc64_linux_gregset : &ppc32_linux_gregset; |
| 572 | } |
| 573 | |
| 574 | const struct regset * |
| 575 | ppc_linux_fpregset (void) |
| 576 | { |
| 577 | return &ppc32_linux_fpregset; |
| 578 | } |
| 579 | |
| 580 | const struct regset * |
| 581 | ppc_linux_vrregset (struct gdbarch *gdbarch) |
| 582 | { |
| 583 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 584 | return &ppc32_be_linux_vrregset; |
| 585 | else |
| 586 | return &ppc32_le_linux_vrregset; |
| 587 | } |
| 588 | |
| 589 | const struct regset * |
| 590 | ppc_linux_vsxregset (void) |
| 591 | { |
| 592 | return &ppc32_linux_vsxregset; |
| 593 | } |
| 594 | |
| 595 | /* Iterate over supported core file register note sections. */ |
| 596 | |
| 597 | static void |
| 598 | ppc_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, |
| 599 | iterate_over_regset_sections_cb *cb, |
| 600 | void *cb_data, |
| 601 | const struct regcache *regcache) |
| 602 | { |
| 603 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 604 | int have_altivec = tdep->ppc_vr0_regnum != -1; |
| 605 | int have_vsx = tdep->ppc_vsr0_upper_regnum != -1; |
| 606 | |
| 607 | if (tdep->wordsize == 4) |
| 608 | cb (".reg", 48 * 4, 48 * 4, &ppc32_linux_gregset, NULL, cb_data); |
| 609 | else |
| 610 | cb (".reg", 48 * 8, 48 * 8, &ppc64_linux_gregset, NULL, cb_data); |
| 611 | |
| 612 | cb (".reg2", 264, 264, &ppc32_linux_fpregset, NULL, cb_data); |
| 613 | |
| 614 | if (have_altivec) |
| 615 | { |
| 616 | const struct regset *vrregset = ppc_linux_vrregset (gdbarch); |
| 617 | cb (".reg-ppc-vmx", PPC_LINUX_SIZEOF_VRREGSET, PPC_LINUX_SIZEOF_VRREGSET, |
| 618 | vrregset, "ppc Altivec", cb_data); |
| 619 | } |
| 620 | |
| 621 | if (have_vsx) |
| 622 | cb (".reg-ppc-vsx", PPC_LINUX_SIZEOF_VSXREGSET, PPC_LINUX_SIZEOF_VSXREGSET, |
| 623 | &ppc32_linux_vsxregset, "POWER7 VSX", cb_data); |
| 624 | } |
| 625 | |
| 626 | static void |
| 627 | ppc_linux_sigtramp_cache (struct frame_info *this_frame, |
| 628 | struct trad_frame_cache *this_cache, |
| 629 | CORE_ADDR func, LONGEST offset, |
| 630 | int bias) |
| 631 | { |
| 632 | CORE_ADDR base; |
| 633 | CORE_ADDR regs; |
| 634 | CORE_ADDR gpregs; |
| 635 | CORE_ADDR fpregs; |
| 636 | int i; |
| 637 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 638 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 639 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 640 | |
| 641 | base = get_frame_register_unsigned (this_frame, |
| 642 | gdbarch_sp_regnum (gdbarch)); |
| 643 | if (bias > 0 && get_frame_pc (this_frame) != func) |
| 644 | /* See below, some signal trampolines increment the stack as their |
| 645 | first instruction, need to compensate for that. */ |
| 646 | base -= bias; |
| 647 | |
| 648 | /* Find the address of the register buffer pointer. */ |
| 649 | regs = base + offset; |
| 650 | /* Use that to find the address of the corresponding register |
| 651 | buffers. */ |
| 652 | gpregs = read_memory_unsigned_integer (regs, tdep->wordsize, byte_order); |
| 653 | fpregs = gpregs + 48 * tdep->wordsize; |
| 654 | |
| 655 | /* General purpose. */ |
| 656 | for (i = 0; i < 32; i++) |
| 657 | { |
| 658 | int regnum = i + tdep->ppc_gp0_regnum; |
| 659 | trad_frame_set_reg_addr (this_cache, |
| 660 | regnum, gpregs + i * tdep->wordsize); |
| 661 | } |
| 662 | trad_frame_set_reg_addr (this_cache, |
| 663 | gdbarch_pc_regnum (gdbarch), |
| 664 | gpregs + 32 * tdep->wordsize); |
| 665 | trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, |
| 666 | gpregs + 35 * tdep->wordsize); |
| 667 | trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, |
| 668 | gpregs + 36 * tdep->wordsize); |
| 669 | trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, |
| 670 | gpregs + 37 * tdep->wordsize); |
| 671 | trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, |
| 672 | gpregs + 38 * tdep->wordsize); |
| 673 | |
| 674 | if (ppc_linux_trap_reg_p (gdbarch)) |
| 675 | { |
| 676 | trad_frame_set_reg_addr (this_cache, PPC_ORIG_R3_REGNUM, |
| 677 | gpregs + 34 * tdep->wordsize); |
| 678 | trad_frame_set_reg_addr (this_cache, PPC_TRAP_REGNUM, |
| 679 | gpregs + 40 * tdep->wordsize); |
| 680 | } |
| 681 | |
| 682 | if (ppc_floating_point_unit_p (gdbarch)) |
| 683 | { |
| 684 | /* Floating point registers. */ |
| 685 | for (i = 0; i < 32; i++) |
| 686 | { |
| 687 | int regnum = i + gdbarch_fp0_regnum (gdbarch); |
| 688 | trad_frame_set_reg_addr (this_cache, regnum, |
| 689 | fpregs + i * tdep->wordsize); |
| 690 | } |
| 691 | trad_frame_set_reg_addr (this_cache, tdep->ppc_fpscr_regnum, |
| 692 | fpregs + 32 * tdep->wordsize); |
| 693 | } |
| 694 | trad_frame_set_id (this_cache, frame_id_build (base, func)); |
| 695 | } |
| 696 | |
| 697 | static void |
| 698 | ppc32_linux_sigaction_cache_init (const struct tramp_frame *self, |
| 699 | struct frame_info *this_frame, |
| 700 | struct trad_frame_cache *this_cache, |
| 701 | CORE_ADDR func) |
| 702 | { |
| 703 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 704 | 0xd0 /* Offset to ucontext_t. */ |
| 705 | + 0x30 /* Offset to .reg. */, |
| 706 | 0); |
| 707 | } |
| 708 | |
| 709 | static void |
| 710 | ppc64_linux_sigaction_cache_init (const struct tramp_frame *self, |
| 711 | struct frame_info *this_frame, |
| 712 | struct trad_frame_cache *this_cache, |
| 713 | CORE_ADDR func) |
| 714 | { |
| 715 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 716 | 0x80 /* Offset to ucontext_t. */ |
| 717 | + 0xe0 /* Offset to .reg. */, |
| 718 | 128); |
| 719 | } |
| 720 | |
| 721 | static void |
| 722 | ppc32_linux_sighandler_cache_init (const struct tramp_frame *self, |
| 723 | struct frame_info *this_frame, |
| 724 | struct trad_frame_cache *this_cache, |
| 725 | CORE_ADDR func) |
| 726 | { |
| 727 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 728 | 0x40 /* Offset to ucontext_t. */ |
| 729 | + 0x1c /* Offset to .reg. */, |
| 730 | 0); |
| 731 | } |
| 732 | |
| 733 | static void |
| 734 | ppc64_linux_sighandler_cache_init (const struct tramp_frame *self, |
| 735 | struct frame_info *this_frame, |
| 736 | struct trad_frame_cache *this_cache, |
| 737 | CORE_ADDR func) |
| 738 | { |
| 739 | ppc_linux_sigtramp_cache (this_frame, this_cache, func, |
| 740 | 0x80 /* Offset to struct sigcontext. */ |
| 741 | + 0x38 /* Offset to .reg. */, |
| 742 | 128); |
| 743 | } |
| 744 | |
| 745 | static struct tramp_frame ppc32_linux_sigaction_tramp_frame = { |
| 746 | SIGTRAMP_FRAME, |
| 747 | 4, |
| 748 | { |
| 749 | { 0x380000ac, ULONGEST_MAX }, /* li r0, 172 */ |
| 750 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 751 | { TRAMP_SENTINEL_INSN }, |
| 752 | }, |
| 753 | ppc32_linux_sigaction_cache_init |
| 754 | }; |
| 755 | static struct tramp_frame ppc64_linux_sigaction_tramp_frame = { |
| 756 | SIGTRAMP_FRAME, |
| 757 | 4, |
| 758 | { |
| 759 | { 0x38210080, ULONGEST_MAX }, /* addi r1,r1,128 */ |
| 760 | { 0x380000ac, ULONGEST_MAX }, /* li r0, 172 */ |
| 761 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 762 | { TRAMP_SENTINEL_INSN }, |
| 763 | }, |
| 764 | ppc64_linux_sigaction_cache_init |
| 765 | }; |
| 766 | static struct tramp_frame ppc32_linux_sighandler_tramp_frame = { |
| 767 | SIGTRAMP_FRAME, |
| 768 | 4, |
| 769 | { |
| 770 | { 0x38000077, ULONGEST_MAX }, /* li r0,119 */ |
| 771 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 772 | { TRAMP_SENTINEL_INSN }, |
| 773 | }, |
| 774 | ppc32_linux_sighandler_cache_init |
| 775 | }; |
| 776 | static struct tramp_frame ppc64_linux_sighandler_tramp_frame = { |
| 777 | SIGTRAMP_FRAME, |
| 778 | 4, |
| 779 | { |
| 780 | { 0x38210080, ULONGEST_MAX }, /* addi r1,r1,128 */ |
| 781 | { 0x38000077, ULONGEST_MAX }, /* li r0,119 */ |
| 782 | { 0x44000002, ULONGEST_MAX }, /* sc */ |
| 783 | { TRAMP_SENTINEL_INSN }, |
| 784 | }, |
| 785 | ppc64_linux_sighandler_cache_init |
| 786 | }; |
| 787 | |
| 788 | /* Return 1 if PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM are usable. */ |
| 789 | int |
| 790 | ppc_linux_trap_reg_p (struct gdbarch *gdbarch) |
| 791 | { |
| 792 | /* If we do not have a target description with registers, then |
| 793 | the special registers will not be included in the register set. */ |
| 794 | if (!tdesc_has_registers (gdbarch_target_desc (gdbarch))) |
| 795 | return 0; |
| 796 | |
| 797 | /* If we do, then it is safe to check the size. */ |
| 798 | return register_size (gdbarch, PPC_ORIG_R3_REGNUM) > 0 |
| 799 | && register_size (gdbarch, PPC_TRAP_REGNUM) > 0; |
| 800 | } |
| 801 | |
| 802 | /* Return the current system call's number present in the |
| 803 | r0 register. When the function fails, it returns -1. */ |
| 804 | static LONGEST |
| 805 | ppc_linux_get_syscall_number (struct gdbarch *gdbarch, |
| 806 | thread_info *thread) |
| 807 | { |
| 808 | struct regcache *regcache = get_thread_regcache (thread); |
| 809 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 810 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 811 | |
| 812 | /* Make sure we're in a 32- or 64-bit machine */ |
| 813 | gdb_assert (tdep->wordsize == 4 || tdep->wordsize == 8); |
| 814 | |
| 815 | /* The content of a register */ |
| 816 | gdb::byte_vector buf (tdep->wordsize); |
| 817 | |
| 818 | /* Getting the system call number from the register. |
| 819 | When dealing with PowerPC architecture, this information |
| 820 | is stored at 0th register. */ |
| 821 | regcache->cooked_read (tdep->ppc_gp0_regnum, buf.data ()); |
| 822 | |
| 823 | return extract_signed_integer (buf.data (), tdep->wordsize, byte_order); |
| 824 | } |
| 825 | |
| 826 | /* PPC process record-replay */ |
| 827 | |
| 828 | static struct linux_record_tdep ppc_linux_record_tdep; |
| 829 | static struct linux_record_tdep ppc64_linux_record_tdep; |
| 830 | |
| 831 | /* ppc_canonicalize_syscall maps from the native PowerPC Linux set of |
| 832 | syscall ids into a canonical set of syscall ids used by process |
| 833 | record. (See arch/powerpc/include/uapi/asm/unistd.h in kernel tree.) |
| 834 | Return -1 if this system call is not supported by process record. |
| 835 | Otherwise, return the syscall number for preocess reocrd of given |
| 836 | SYSCALL. */ |
| 837 | |
| 838 | static enum gdb_syscall |
| 839 | ppc_canonicalize_syscall (int syscall) |
| 840 | { |
| 841 | int result = -1; |
| 842 | |
| 843 | if (syscall <= 165) |
| 844 | result = syscall; |
| 845 | else if (syscall >= 167 && syscall <= 190) /* Skip query_module 166 */ |
| 846 | result = syscall + 1; |
| 847 | else if (syscall >= 192 && syscall <= 197) /* mmap2 */ |
| 848 | result = syscall; |
| 849 | else if (syscall == 208) /* tkill */ |
| 850 | result = gdb_sys_tkill; |
| 851 | else if (syscall >= 207 && syscall <= 220) /* gettid */ |
| 852 | result = syscall + 224 - 207; |
| 853 | else if (syscall >= 234 && syscall <= 239) /* exit_group */ |
| 854 | result = syscall + 252 - 234; |
| 855 | else if (syscall >= 240 && syscall <= 248) /* timer_create */ |
| 856 | result = syscall += 259 - 240; |
| 857 | else if (syscall >= 250 && syscall <= 251) /* tgkill */ |
| 858 | result = syscall + 270 - 250; |
| 859 | else if (syscall == 336) |
| 860 | result = gdb_sys_recv; |
| 861 | else if (syscall == 337) |
| 862 | result = gdb_sys_recvfrom; |
| 863 | else if (syscall == 342) |
| 864 | result = gdb_sys_recvmsg; |
| 865 | |
| 866 | return (enum gdb_syscall) result; |
| 867 | } |
| 868 | |
| 869 | /* Record registers which might be clobbered during system call. |
| 870 | Return 0 if successful. */ |
| 871 | |
| 872 | static int |
| 873 | ppc_linux_syscall_record (struct regcache *regcache) |
| 874 | { |
| 875 | struct gdbarch *gdbarch = regcache->arch (); |
| 876 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 877 | ULONGEST scnum; |
| 878 | enum gdb_syscall syscall_gdb; |
| 879 | int ret; |
| 880 | int i; |
| 881 | |
| 882 | regcache_raw_read_unsigned (regcache, tdep->ppc_gp0_regnum, &scnum); |
| 883 | syscall_gdb = ppc_canonicalize_syscall (scnum); |
| 884 | |
| 885 | if (syscall_gdb < 0) |
| 886 | { |
| 887 | printf_unfiltered (_("Process record and replay target doesn't " |
| 888 | "support syscall number %d\n"), (int) scnum); |
| 889 | return 0; |
| 890 | } |
| 891 | |
| 892 | if (syscall_gdb == gdb_sys_sigreturn |
| 893 | || syscall_gdb == gdb_sys_rt_sigreturn) |
| 894 | { |
| 895 | int i, j; |
| 896 | int regsets[] = { tdep->ppc_gp0_regnum, |
| 897 | tdep->ppc_fp0_regnum, |
| 898 | tdep->ppc_vr0_regnum, |
| 899 | tdep->ppc_vsr0_upper_regnum }; |
| 900 | |
| 901 | for (j = 0; j < 4; j++) |
| 902 | { |
| 903 | if (regsets[j] == -1) |
| 904 | continue; |
| 905 | for (i = 0; i < 32; i++) |
| 906 | { |
| 907 | if (record_full_arch_list_add_reg (regcache, regsets[j] + i)) |
| 908 | return -1; |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum)) |
| 913 | return -1; |
| 914 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum)) |
| 915 | return -1; |
| 916 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum)) |
| 917 | return -1; |
| 918 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_xer_regnum)) |
| 919 | return -1; |
| 920 | |
| 921 | return 0; |
| 922 | } |
| 923 | |
| 924 | if (tdep->wordsize == 8) |
| 925 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 926 | &ppc64_linux_record_tdep); |
| 927 | else |
| 928 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 929 | &ppc_linux_record_tdep); |
| 930 | |
| 931 | if (ret != 0) |
| 932 | return ret; |
| 933 | |
| 934 | /* Record registers clobbered during syscall. */ |
| 935 | for (i = 3; i <= 12; i++) |
| 936 | { |
| 937 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + i)) |
| 938 | return -1; |
| 939 | } |
| 940 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + 0)) |
| 941 | return -1; |
| 942 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum)) |
| 943 | return -1; |
| 944 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum)) |
| 945 | return -1; |
| 946 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum)) |
| 947 | return -1; |
| 948 | |
| 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | /* Record registers which might be clobbered during signal handling. |
| 953 | Return 0 if successful. */ |
| 954 | |
| 955 | static int |
| 956 | ppc_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache, |
| 957 | enum gdb_signal signal) |
| 958 | { |
| 959 | /* See handle_rt_signal64 in arch/powerpc/kernel/signal_64.c |
| 960 | handle_rt_signal32 in arch/powerpc/kernel/signal_32.c |
| 961 | arch/powerpc/include/asm/ptrace.h |
| 962 | for details. */ |
| 963 | const int SIGNAL_FRAMESIZE = 128; |
| 964 | const int sizeof_rt_sigframe = 1440 * 2 + 8 * 2 + 4 * 6 + 8 + 8 + 128 + 512; |
| 965 | ULONGEST sp; |
| 966 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 967 | int i; |
| 968 | |
| 969 | for (i = 3; i <= 12; i++) |
| 970 | { |
| 971 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_gp0_regnum + i)) |
| 972 | return -1; |
| 973 | } |
| 974 | |
| 975 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_lr_regnum)) |
| 976 | return -1; |
| 977 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_cr_regnum)) |
| 978 | return -1; |
| 979 | if (record_full_arch_list_add_reg (regcache, tdep->ppc_ctr_regnum)) |
| 980 | return -1; |
| 981 | if (record_full_arch_list_add_reg (regcache, gdbarch_pc_regnum (gdbarch))) |
| 982 | return -1; |
| 983 | if (record_full_arch_list_add_reg (regcache, gdbarch_sp_regnum (gdbarch))) |
| 984 | return -1; |
| 985 | |
| 986 | /* Record the change in the stack. |
| 987 | frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */ |
| 988 | regcache_raw_read_unsigned (regcache, gdbarch_sp_regnum (gdbarch), &sp); |
| 989 | sp -= SIGNAL_FRAMESIZE; |
| 990 | sp -= sizeof_rt_sigframe; |
| 991 | |
| 992 | if (record_full_arch_list_add_mem (sp, SIGNAL_FRAMESIZE + sizeof_rt_sigframe)) |
| 993 | return -1; |
| 994 | |
| 995 | if (record_full_arch_list_add_end ()) |
| 996 | return -1; |
| 997 | |
| 998 | return 0; |
| 999 | } |
| 1000 | |
| 1001 | static void |
| 1002 | ppc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc) |
| 1003 | { |
| 1004 | struct gdbarch *gdbarch = regcache->arch (); |
| 1005 | |
| 1006 | regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch), pc); |
| 1007 | |
| 1008 | /* Set special TRAP register to -1 to prevent the kernel from |
| 1009 | messing with the PC we just installed, if we happen to be |
| 1010 | within an interrupted system call that the kernel wants to |
| 1011 | restart. |
| 1012 | |
| 1013 | Note that after we return from the dummy call, the TRAP and |
| 1014 | ORIG_R3 registers will be automatically restored, and the |
| 1015 | kernel continues to restart the system call at this point. */ |
| 1016 | if (ppc_linux_trap_reg_p (gdbarch)) |
| 1017 | regcache_cooked_write_unsigned (regcache, PPC_TRAP_REGNUM, -1); |
| 1018 | } |
| 1019 | |
| 1020 | static int |
| 1021 | ppc_linux_spu_section (bfd *abfd, asection *asect, void *user_data) |
| 1022 | { |
| 1023 | return startswith (bfd_section_name (abfd, asect), "SPU/"); |
| 1024 | } |
| 1025 | |
| 1026 | static const struct target_desc * |
| 1027 | ppc_linux_core_read_description (struct gdbarch *gdbarch, |
| 1028 | struct target_ops *target, |
| 1029 | bfd *abfd) |
| 1030 | { |
| 1031 | struct ppc_linux_features features = ppc_linux_no_features; |
| 1032 | asection *cell = bfd_sections_find_if (abfd, ppc_linux_spu_section, NULL); |
| 1033 | asection *altivec = bfd_get_section_by_name (abfd, ".reg-ppc-vmx"); |
| 1034 | asection *vsx = bfd_get_section_by_name (abfd, ".reg-ppc-vsx"); |
| 1035 | asection *section = bfd_get_section_by_name (abfd, ".reg"); |
| 1036 | |
| 1037 | if (! section) |
| 1038 | return NULL; |
| 1039 | |
| 1040 | switch (bfd_section_size (abfd, section)) |
| 1041 | { |
| 1042 | case 48 * 4: |
| 1043 | features.wordsize = 4; |
| 1044 | break; |
| 1045 | case 48 * 8: |
| 1046 | features.wordsize = 8; |
| 1047 | break; |
| 1048 | default: |
| 1049 | return NULL; |
| 1050 | } |
| 1051 | |
| 1052 | if (cell) |
| 1053 | features.cell = true; |
| 1054 | |
| 1055 | if (altivec) |
| 1056 | features.altivec = true; |
| 1057 | |
| 1058 | if (vsx) |
| 1059 | features.vsx = true; |
| 1060 | |
| 1061 | CORE_ADDR hwcap; |
| 1062 | |
| 1063 | if (target_auxv_search (target, AT_HWCAP, &hwcap) != 1) |
| 1064 | hwcap = 0; |
| 1065 | |
| 1066 | features.isa205 = ppc_linux_has_isa205 (hwcap); |
| 1067 | |
| 1068 | return ppc_linux_match_description (features); |
| 1069 | } |
| 1070 | |
| 1071 | |
| 1072 | /* Implementation of `gdbarch_elf_make_msymbol_special', as defined in |
| 1073 | gdbarch.h. This implementation is used for the ELFv2 ABI only. */ |
| 1074 | |
| 1075 | static void |
| 1076 | ppc_elfv2_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) |
| 1077 | { |
| 1078 | elf_symbol_type *elf_sym = (elf_symbol_type *)sym; |
| 1079 | |
| 1080 | /* If the symbol is marked as having a local entry point, set a target |
| 1081 | flag in the msymbol. We currently only support local entry point |
| 1082 | offsets of 8 bytes, which is the only entry point offset ever used |
| 1083 | by current compilers. If/when other offsets are ever used, we will |
| 1084 | have to use additional target flag bits to store them. */ |
| 1085 | switch (PPC64_LOCAL_ENTRY_OFFSET (elf_sym->internal_elf_sym.st_other)) |
| 1086 | { |
| 1087 | default: |
| 1088 | break; |
| 1089 | case 8: |
| 1090 | MSYMBOL_TARGET_FLAG_1 (msym) = 1; |
| 1091 | break; |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | /* Implementation of `gdbarch_skip_entrypoint', as defined in |
| 1096 | gdbarch.h. This implementation is used for the ELFv2 ABI only. */ |
| 1097 | |
| 1098 | static CORE_ADDR |
| 1099 | ppc_elfv2_skip_entrypoint (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 1100 | { |
| 1101 | struct bound_minimal_symbol fun; |
| 1102 | int local_entry_offset = 0; |
| 1103 | |
| 1104 | fun = lookup_minimal_symbol_by_pc (pc); |
| 1105 | if (fun.minsym == NULL) |
| 1106 | return pc; |
| 1107 | |
| 1108 | /* See ppc_elfv2_elf_make_msymbol_special for how local entry point |
| 1109 | offset values are encoded. */ |
| 1110 | if (MSYMBOL_TARGET_FLAG_1 (fun.minsym)) |
| 1111 | local_entry_offset = 8; |
| 1112 | |
| 1113 | if (BMSYMBOL_VALUE_ADDRESS (fun) <= pc |
| 1114 | && pc < BMSYMBOL_VALUE_ADDRESS (fun) + local_entry_offset) |
| 1115 | return BMSYMBOL_VALUE_ADDRESS (fun) + local_entry_offset; |
| 1116 | |
| 1117 | return pc; |
| 1118 | } |
| 1119 | |
| 1120 | /* Implementation of `gdbarch_stap_is_single_operand', as defined in |
| 1121 | gdbarch.h. */ |
| 1122 | |
| 1123 | static int |
| 1124 | ppc_stap_is_single_operand (struct gdbarch *gdbarch, const char *s) |
| 1125 | { |
| 1126 | return (*s == 'i' /* Literal number. */ |
| 1127 | || (isdigit (*s) && s[1] == '(' |
| 1128 | && isdigit (s[2])) /* Displacement. */ |
| 1129 | || (*s == '(' && isdigit (s[1])) /* Register indirection. */ |
| 1130 | || isdigit (*s)); /* Register value. */ |
| 1131 | } |
| 1132 | |
| 1133 | /* Implementation of `gdbarch_stap_parse_special_token', as defined in |
| 1134 | gdbarch.h. */ |
| 1135 | |
| 1136 | static int |
| 1137 | ppc_stap_parse_special_token (struct gdbarch *gdbarch, |
| 1138 | struct stap_parse_info *p) |
| 1139 | { |
| 1140 | if (isdigit (*p->arg)) |
| 1141 | { |
| 1142 | /* This temporary pointer is needed because we have to do a lookahead. |
| 1143 | We could be dealing with a register displacement, and in such case |
| 1144 | we would not need to do anything. */ |
| 1145 | const char *s = p->arg; |
| 1146 | char *regname; |
| 1147 | int len; |
| 1148 | struct stoken str; |
| 1149 | |
| 1150 | while (isdigit (*s)) |
| 1151 | ++s; |
| 1152 | |
| 1153 | if (*s == '(') |
| 1154 | { |
| 1155 | /* It is a register displacement indeed. Returning 0 means we are |
| 1156 | deferring the treatment of this case to the generic parser. */ |
| 1157 | return 0; |
| 1158 | } |
| 1159 | |
| 1160 | len = s - p->arg; |
| 1161 | regname = (char *) alloca (len + 2); |
| 1162 | regname[0] = 'r'; |
| 1163 | |
| 1164 | strncpy (regname + 1, p->arg, len); |
| 1165 | ++len; |
| 1166 | regname[len] = '\0'; |
| 1167 | |
| 1168 | if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1) |
| 1169 | error (_("Invalid register name `%s' on expression `%s'."), |
| 1170 | regname, p->saved_arg); |
| 1171 | |
| 1172 | write_exp_elt_opcode (&p->pstate, OP_REGISTER); |
| 1173 | str.ptr = regname; |
| 1174 | str.length = len; |
| 1175 | write_exp_string (&p->pstate, str); |
| 1176 | write_exp_elt_opcode (&p->pstate, OP_REGISTER); |
| 1177 | |
| 1178 | p->arg = s; |
| 1179 | } |
| 1180 | else |
| 1181 | { |
| 1182 | /* All the other tokens should be handled correctly by the generic |
| 1183 | parser. */ |
| 1184 | return 0; |
| 1185 | } |
| 1186 | |
| 1187 | return 1; |
| 1188 | } |
| 1189 | |
| 1190 | /* Cell/B.E. active SPE context tracking support. */ |
| 1191 | |
| 1192 | static struct objfile *spe_context_objfile = NULL; |
| 1193 | static CORE_ADDR spe_context_lm_addr = 0; |
| 1194 | static CORE_ADDR spe_context_offset = 0; |
| 1195 | |
| 1196 | static ptid_t spe_context_cache_ptid; |
| 1197 | static CORE_ADDR spe_context_cache_address; |
| 1198 | |
| 1199 | /* Hook into inferior_created, solib_loaded, and solib_unloaded observers |
| 1200 | to track whether we've loaded a version of libspe2 (as static or dynamic |
| 1201 | library) that provides the __spe_current_active_context variable. */ |
| 1202 | static void |
| 1203 | ppc_linux_spe_context_lookup (struct objfile *objfile) |
| 1204 | { |
| 1205 | struct bound_minimal_symbol sym; |
| 1206 | |
| 1207 | if (!objfile) |
| 1208 | { |
| 1209 | spe_context_objfile = NULL; |
| 1210 | spe_context_lm_addr = 0; |
| 1211 | spe_context_offset = 0; |
| 1212 | spe_context_cache_ptid = minus_one_ptid; |
| 1213 | spe_context_cache_address = 0; |
| 1214 | return; |
| 1215 | } |
| 1216 | |
| 1217 | sym = lookup_minimal_symbol ("__spe_current_active_context", NULL, objfile); |
| 1218 | if (sym.minsym) |
| 1219 | { |
| 1220 | spe_context_objfile = objfile; |
| 1221 | spe_context_lm_addr = svr4_fetch_objfile_link_map (objfile); |
| 1222 | spe_context_offset = MSYMBOL_VALUE_RAW_ADDRESS (sym.minsym); |
| 1223 | spe_context_cache_ptid = minus_one_ptid; |
| 1224 | spe_context_cache_address = 0; |
| 1225 | return; |
| 1226 | } |
| 1227 | } |
| 1228 | |
| 1229 | static void |
| 1230 | ppc_linux_spe_context_inferior_created (struct target_ops *t, int from_tty) |
| 1231 | { |
| 1232 | struct objfile *objfile; |
| 1233 | |
| 1234 | ppc_linux_spe_context_lookup (NULL); |
| 1235 | ALL_OBJFILES (objfile) |
| 1236 | ppc_linux_spe_context_lookup (objfile); |
| 1237 | } |
| 1238 | |
| 1239 | static void |
| 1240 | ppc_linux_spe_context_solib_loaded (struct so_list *so) |
| 1241 | { |
| 1242 | if (strstr (so->so_original_name, "/libspe") != NULL) |
| 1243 | { |
| 1244 | solib_read_symbols (so, 0); |
| 1245 | ppc_linux_spe_context_lookup (so->objfile); |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | static void |
| 1250 | ppc_linux_spe_context_solib_unloaded (struct so_list *so) |
| 1251 | { |
| 1252 | if (so->objfile == spe_context_objfile) |
| 1253 | ppc_linux_spe_context_lookup (NULL); |
| 1254 | } |
| 1255 | |
| 1256 | /* Retrieve contents of the N'th element in the current thread's |
| 1257 | linked SPE context list into ID and NPC. Return the address of |
| 1258 | said context element, or 0 if not found. */ |
| 1259 | static CORE_ADDR |
| 1260 | ppc_linux_spe_context (int wordsize, enum bfd_endian byte_order, |
| 1261 | int n, int *id, unsigned int *npc) |
| 1262 | { |
| 1263 | CORE_ADDR spe_context = 0; |
| 1264 | gdb_byte buf[16]; |
| 1265 | int i; |
| 1266 | |
| 1267 | /* Quick exit if we have not found __spe_current_active_context. */ |
| 1268 | if (!spe_context_objfile) |
| 1269 | return 0; |
| 1270 | |
| 1271 | /* Look up cached address of thread-local variable. */ |
| 1272 | if (spe_context_cache_ptid != inferior_ptid) |
| 1273 | { |
| 1274 | struct target_ops *target = current_top_target (); |
| 1275 | |
| 1276 | TRY |
| 1277 | { |
| 1278 | /* We do not call target_translate_tls_address here, because |
| 1279 | svr4_fetch_objfile_link_map may invalidate the frame chain, |
| 1280 | which must not do while inside a frame sniffer. |
| 1281 | |
| 1282 | Instead, we have cached the lm_addr value, and use that to |
| 1283 | directly call the target's to_get_thread_local_address. */ |
| 1284 | spe_context_cache_address |
| 1285 | = target->get_thread_local_address (inferior_ptid, |
| 1286 | spe_context_lm_addr, |
| 1287 | spe_context_offset); |
| 1288 | spe_context_cache_ptid = inferior_ptid; |
| 1289 | } |
| 1290 | |
| 1291 | CATCH (ex, RETURN_MASK_ERROR) |
| 1292 | { |
| 1293 | return 0; |
| 1294 | } |
| 1295 | END_CATCH |
| 1296 | } |
| 1297 | |
| 1298 | /* Read variable value. */ |
| 1299 | if (target_read_memory (spe_context_cache_address, buf, wordsize) == 0) |
| 1300 | spe_context = extract_unsigned_integer (buf, wordsize, byte_order); |
| 1301 | |
| 1302 | /* Cyle through to N'th linked list element. */ |
| 1303 | for (i = 0; i < n && spe_context; i++) |
| 1304 | if (target_read_memory (spe_context + align_up (12, wordsize), |
| 1305 | buf, wordsize) == 0) |
| 1306 | spe_context = extract_unsigned_integer (buf, wordsize, byte_order); |
| 1307 | else |
| 1308 | spe_context = 0; |
| 1309 | |
| 1310 | /* Read current context. */ |
| 1311 | if (spe_context |
| 1312 | && target_read_memory (spe_context, buf, 12) != 0) |
| 1313 | spe_context = 0; |
| 1314 | |
| 1315 | /* Extract data elements. */ |
| 1316 | if (spe_context) |
| 1317 | { |
| 1318 | if (id) |
| 1319 | *id = extract_signed_integer (buf, 4, byte_order); |
| 1320 | if (npc) |
| 1321 | *npc = extract_unsigned_integer (buf + 4, 4, byte_order); |
| 1322 | } |
| 1323 | |
| 1324 | return spe_context; |
| 1325 | } |
| 1326 | |
| 1327 | |
| 1328 | /* Cell/B.E. cross-architecture unwinder support. */ |
| 1329 | |
| 1330 | struct ppu2spu_cache |
| 1331 | { |
| 1332 | struct frame_id frame_id; |
| 1333 | readonly_detached_regcache *regcache; |
| 1334 | }; |
| 1335 | |
| 1336 | static struct gdbarch * |
| 1337 | ppu2spu_prev_arch (struct frame_info *this_frame, void **this_cache) |
| 1338 | { |
| 1339 | struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache; |
| 1340 | return cache->regcache->arch (); |
| 1341 | } |
| 1342 | |
| 1343 | static void |
| 1344 | ppu2spu_this_id (struct frame_info *this_frame, |
| 1345 | void **this_cache, struct frame_id *this_id) |
| 1346 | { |
| 1347 | struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache; |
| 1348 | *this_id = cache->frame_id; |
| 1349 | } |
| 1350 | |
| 1351 | static struct value * |
| 1352 | ppu2spu_prev_register (struct frame_info *this_frame, |
| 1353 | void **this_cache, int regnum) |
| 1354 | { |
| 1355 | struct ppu2spu_cache *cache = (struct ppu2spu_cache *) *this_cache; |
| 1356 | struct gdbarch *gdbarch = cache->regcache->arch (); |
| 1357 | gdb_byte *buf; |
| 1358 | |
| 1359 | buf = (gdb_byte *) alloca (register_size (gdbarch, regnum)); |
| 1360 | |
| 1361 | cache->regcache->cooked_read (regnum, buf); |
| 1362 | return frame_unwind_got_bytes (this_frame, regnum, buf); |
| 1363 | } |
| 1364 | |
| 1365 | struct ppu2spu_data |
| 1366 | { |
| 1367 | struct gdbarch *gdbarch; |
| 1368 | int id; |
| 1369 | unsigned int npc; |
| 1370 | gdb_byte gprs[128*16]; |
| 1371 | }; |
| 1372 | |
| 1373 | static enum register_status |
| 1374 | ppu2spu_unwind_register (ppu2spu_data *data, int regnum, gdb_byte *buf) |
| 1375 | { |
| 1376 | enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch); |
| 1377 | |
| 1378 | if (regnum >= 0 && regnum < SPU_NUM_GPRS) |
| 1379 | memcpy (buf, data->gprs + 16*regnum, 16); |
| 1380 | else if (regnum == SPU_ID_REGNUM) |
| 1381 | store_unsigned_integer (buf, 4, byte_order, data->id); |
| 1382 | else if (regnum == SPU_PC_REGNUM) |
| 1383 | store_unsigned_integer (buf, 4, byte_order, data->npc); |
| 1384 | else |
| 1385 | return REG_UNAVAILABLE; |
| 1386 | |
| 1387 | return REG_VALID; |
| 1388 | } |
| 1389 | |
| 1390 | static int |
| 1391 | ppu2spu_sniffer (const struct frame_unwind *self, |
| 1392 | struct frame_info *this_frame, void **this_prologue_cache) |
| 1393 | { |
| 1394 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 1395 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1396 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1397 | struct ppu2spu_data data; |
| 1398 | struct frame_info *fi; |
| 1399 | CORE_ADDR base, func, backchain, spe_context; |
| 1400 | gdb_byte buf[8]; |
| 1401 | int n = 0; |
| 1402 | |
| 1403 | /* Count the number of SPU contexts already in the frame chain. */ |
| 1404 | for (fi = get_next_frame (this_frame); fi; fi = get_next_frame (fi)) |
| 1405 | if (get_frame_type (fi) == ARCH_FRAME |
| 1406 | && gdbarch_bfd_arch_info (get_frame_arch (fi))->arch == bfd_arch_spu) |
| 1407 | n++; |
| 1408 | |
| 1409 | base = get_frame_sp (this_frame); |
| 1410 | func = get_frame_pc (this_frame); |
| 1411 | if (target_read_memory (base, buf, tdep->wordsize)) |
| 1412 | return 0; |
| 1413 | backchain = extract_unsigned_integer (buf, tdep->wordsize, byte_order); |
| 1414 | |
| 1415 | spe_context = ppc_linux_spe_context (tdep->wordsize, byte_order, |
| 1416 | n, &data.id, &data.npc); |
| 1417 | if (spe_context && base <= spe_context && spe_context < backchain) |
| 1418 | { |
| 1419 | char annex[32]; |
| 1420 | |
| 1421 | /* Find gdbarch for SPU. */ |
| 1422 | struct gdbarch_info info; |
| 1423 | gdbarch_info_init (&info); |
| 1424 | info.bfd_arch_info = bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu); |
| 1425 | info.byte_order = BFD_ENDIAN_BIG; |
| 1426 | info.osabi = GDB_OSABI_LINUX; |
| 1427 | info.id = &data.id; |
| 1428 | data.gdbarch = gdbarch_find_by_info (info); |
| 1429 | if (!data.gdbarch) |
| 1430 | return 0; |
| 1431 | |
| 1432 | xsnprintf (annex, sizeof annex, "%d/regs", data.id); |
| 1433 | if (target_read (current_top_target (), TARGET_OBJECT_SPU, annex, |
| 1434 | data.gprs, 0, sizeof data.gprs) |
| 1435 | == sizeof data.gprs) |
| 1436 | { |
| 1437 | auto cooked_read = [&data] (int regnum, gdb_byte *buf) |
| 1438 | { |
| 1439 | return ppu2spu_unwind_register (&data, regnum, buf); |
| 1440 | }; |
| 1441 | struct ppu2spu_cache *cache |
| 1442 | = FRAME_OBSTACK_CALLOC (1, struct ppu2spu_cache); |
| 1443 | std::unique_ptr<readonly_detached_regcache> regcache |
| 1444 | (new readonly_detached_regcache (data.gdbarch, cooked_read)); |
| 1445 | |
| 1446 | cache->frame_id = frame_id_build (base, func); |
| 1447 | cache->regcache = regcache.release (); |
| 1448 | *this_prologue_cache = cache; |
| 1449 | return 1; |
| 1450 | } |
| 1451 | } |
| 1452 | |
| 1453 | return 0; |
| 1454 | } |
| 1455 | |
| 1456 | static void |
| 1457 | ppu2spu_dealloc_cache (struct frame_info *self, void *this_cache) |
| 1458 | { |
| 1459 | struct ppu2spu_cache *cache = (struct ppu2spu_cache *) this_cache; |
| 1460 | delete cache->regcache; |
| 1461 | } |
| 1462 | |
| 1463 | static const struct frame_unwind ppu2spu_unwind = { |
| 1464 | ARCH_FRAME, |
| 1465 | default_frame_unwind_stop_reason, |
| 1466 | ppu2spu_this_id, |
| 1467 | ppu2spu_prev_register, |
| 1468 | NULL, |
| 1469 | ppu2spu_sniffer, |
| 1470 | ppu2spu_dealloc_cache, |
| 1471 | ppu2spu_prev_arch, |
| 1472 | }; |
| 1473 | |
| 1474 | /* Initialize linux_record_tdep if not initialized yet. |
| 1475 | WORDSIZE is 4 or 8 for 32- or 64-bit PowerPC Linux respectively. |
| 1476 | Sizes of data structures are initialized accordingly. */ |
| 1477 | |
| 1478 | static void |
| 1479 | ppc_init_linux_record_tdep (struct linux_record_tdep *record_tdep, |
| 1480 | int wordsize) |
| 1481 | { |
| 1482 | /* Simply return if it had been initialized. */ |
| 1483 | if (record_tdep->size_pointer != 0) |
| 1484 | return; |
| 1485 | |
| 1486 | /* These values are the size of the type that will be used in a system |
| 1487 | call. They are obtained from Linux Kernel source. */ |
| 1488 | |
| 1489 | if (wordsize == 8) |
| 1490 | { |
| 1491 | record_tdep->size_pointer = 8; |
| 1492 | record_tdep->size__old_kernel_stat = 32; |
| 1493 | record_tdep->size_tms = 32; |
| 1494 | record_tdep->size_loff_t = 8; |
| 1495 | record_tdep->size_flock = 32; |
| 1496 | record_tdep->size_oldold_utsname = 45; |
| 1497 | record_tdep->size_ustat = 32; |
| 1498 | record_tdep->size_old_sigaction = 32; |
| 1499 | record_tdep->size_old_sigset_t = 8; |
| 1500 | record_tdep->size_rlimit = 16; |
| 1501 | record_tdep->size_rusage = 144; |
| 1502 | record_tdep->size_timeval = 16; |
| 1503 | record_tdep->size_timezone = 8; |
| 1504 | record_tdep->size_old_gid_t = 4; |
| 1505 | record_tdep->size_old_uid_t = 4; |
| 1506 | record_tdep->size_fd_set = 128; |
| 1507 | record_tdep->size_old_dirent = 280; |
| 1508 | record_tdep->size_statfs = 120; |
| 1509 | record_tdep->size_statfs64 = 120; |
| 1510 | record_tdep->size_sockaddr = 16; |
| 1511 | record_tdep->size_int = 4; |
| 1512 | record_tdep->size_long = 8; |
| 1513 | record_tdep->size_ulong = 8; |
| 1514 | record_tdep->size_msghdr = 56; |
| 1515 | record_tdep->size_itimerval = 32; |
| 1516 | record_tdep->size_stat = 144; |
| 1517 | record_tdep->size_old_utsname = 325; |
| 1518 | record_tdep->size_sysinfo = 112; |
| 1519 | record_tdep->size_msqid_ds = 120; |
| 1520 | record_tdep->size_shmid_ds = 112; |
| 1521 | record_tdep->size_new_utsname = 390; |
| 1522 | record_tdep->size_timex = 208; |
| 1523 | record_tdep->size_mem_dqinfo = 24; |
| 1524 | record_tdep->size_if_dqblk = 72; |
| 1525 | record_tdep->size_fs_quota_stat = 80; |
| 1526 | record_tdep->size_timespec = 16; |
| 1527 | record_tdep->size_pollfd = 8; |
| 1528 | record_tdep->size_NFS_FHSIZE = 32; |
| 1529 | record_tdep->size_knfsd_fh = 132; |
| 1530 | record_tdep->size_TASK_COMM_LEN = 16; |
| 1531 | record_tdep->size_sigaction = 32; |
| 1532 | record_tdep->size_sigset_t = 8; |
| 1533 | record_tdep->size_siginfo_t = 128; |
| 1534 | record_tdep->size_cap_user_data_t = 8; |
| 1535 | record_tdep->size_stack_t = 24; |
| 1536 | record_tdep->size_off_t = 8; |
| 1537 | record_tdep->size_stat64 = 104; |
| 1538 | record_tdep->size_gid_t = 4; |
| 1539 | record_tdep->size_uid_t = 4; |
| 1540 | record_tdep->size_PAGE_SIZE = 0x10000; /* 64KB */ |
| 1541 | record_tdep->size_flock64 = 32; |
| 1542 | record_tdep->size_io_event = 32; |
| 1543 | record_tdep->size_iocb = 64; |
| 1544 | record_tdep->size_epoll_event = 16; |
| 1545 | record_tdep->size_itimerspec = 32; |
| 1546 | record_tdep->size_mq_attr = 64; |
| 1547 | record_tdep->size_termios = 44; |
| 1548 | record_tdep->size_pid_t = 4; |
| 1549 | record_tdep->size_winsize = 8; |
| 1550 | record_tdep->size_serial_struct = 72; |
| 1551 | record_tdep->size_serial_icounter_struct = 80; |
| 1552 | record_tdep->size_size_t = 8; |
| 1553 | record_tdep->size_iovec = 16; |
| 1554 | record_tdep->size_time_t = 8; |
| 1555 | } |
| 1556 | else if (wordsize == 4) |
| 1557 | { |
| 1558 | record_tdep->size_pointer = 4; |
| 1559 | record_tdep->size__old_kernel_stat = 32; |
| 1560 | record_tdep->size_tms = 16; |
| 1561 | record_tdep->size_loff_t = 8; |
| 1562 | record_tdep->size_flock = 16; |
| 1563 | record_tdep->size_oldold_utsname = 45; |
| 1564 | record_tdep->size_ustat = 20; |
| 1565 | record_tdep->size_old_sigaction = 16; |
| 1566 | record_tdep->size_old_sigset_t = 4; |
| 1567 | record_tdep->size_rlimit = 8; |
| 1568 | record_tdep->size_rusage = 72; |
| 1569 | record_tdep->size_timeval = 8; |
| 1570 | record_tdep->size_timezone = 8; |
| 1571 | record_tdep->size_old_gid_t = 4; |
| 1572 | record_tdep->size_old_uid_t = 4; |
| 1573 | record_tdep->size_fd_set = 128; |
| 1574 | record_tdep->size_old_dirent = 268; |
| 1575 | record_tdep->size_statfs = 64; |
| 1576 | record_tdep->size_statfs64 = 88; |
| 1577 | record_tdep->size_sockaddr = 16; |
| 1578 | record_tdep->size_int = 4; |
| 1579 | record_tdep->size_long = 4; |
| 1580 | record_tdep->size_ulong = 4; |
| 1581 | record_tdep->size_msghdr = 28; |
| 1582 | record_tdep->size_itimerval = 16; |
| 1583 | record_tdep->size_stat = 88; |
| 1584 | record_tdep->size_old_utsname = 325; |
| 1585 | record_tdep->size_sysinfo = 64; |
| 1586 | record_tdep->size_msqid_ds = 68; |
| 1587 | record_tdep->size_shmid_ds = 60; |
| 1588 | record_tdep->size_new_utsname = 390; |
| 1589 | record_tdep->size_timex = 128; |
| 1590 | record_tdep->size_mem_dqinfo = 24; |
| 1591 | record_tdep->size_if_dqblk = 72; |
| 1592 | record_tdep->size_fs_quota_stat = 80; |
| 1593 | record_tdep->size_timespec = 8; |
| 1594 | record_tdep->size_pollfd = 8; |
| 1595 | record_tdep->size_NFS_FHSIZE = 32; |
| 1596 | record_tdep->size_knfsd_fh = 132; |
| 1597 | record_tdep->size_TASK_COMM_LEN = 16; |
| 1598 | record_tdep->size_sigaction = 20; |
| 1599 | record_tdep->size_sigset_t = 8; |
| 1600 | record_tdep->size_siginfo_t = 128; |
| 1601 | record_tdep->size_cap_user_data_t = 4; |
| 1602 | record_tdep->size_stack_t = 12; |
| 1603 | record_tdep->size_off_t = 4; |
| 1604 | record_tdep->size_stat64 = 104; |
| 1605 | record_tdep->size_gid_t = 4; |
| 1606 | record_tdep->size_uid_t = 4; |
| 1607 | record_tdep->size_PAGE_SIZE = 0x10000; /* 64KB */ |
| 1608 | record_tdep->size_flock64 = 32; |
| 1609 | record_tdep->size_io_event = 32; |
| 1610 | record_tdep->size_iocb = 64; |
| 1611 | record_tdep->size_epoll_event = 16; |
| 1612 | record_tdep->size_itimerspec = 16; |
| 1613 | record_tdep->size_mq_attr = 32; |
| 1614 | record_tdep->size_termios = 44; |
| 1615 | record_tdep->size_pid_t = 4; |
| 1616 | record_tdep->size_winsize = 8; |
| 1617 | record_tdep->size_serial_struct = 60; |
| 1618 | record_tdep->size_serial_icounter_struct = 80; |
| 1619 | record_tdep->size_size_t = 4; |
| 1620 | record_tdep->size_iovec = 8; |
| 1621 | record_tdep->size_time_t = 4; |
| 1622 | } |
| 1623 | else |
| 1624 | internal_error (__FILE__, __LINE__, _("unexpected wordsize")); |
| 1625 | |
| 1626 | /* These values are the second argument of system call "sys_fcntl" |
| 1627 | and "sys_fcntl64". They are obtained from Linux Kernel source. */ |
| 1628 | record_tdep->fcntl_F_GETLK = 5; |
| 1629 | record_tdep->fcntl_F_GETLK64 = 12; |
| 1630 | record_tdep->fcntl_F_SETLK64 = 13; |
| 1631 | record_tdep->fcntl_F_SETLKW64 = 14; |
| 1632 | |
| 1633 | record_tdep->arg1 = PPC_R0_REGNUM + 3; |
| 1634 | record_tdep->arg2 = PPC_R0_REGNUM + 4; |
| 1635 | record_tdep->arg3 = PPC_R0_REGNUM + 5; |
| 1636 | record_tdep->arg4 = PPC_R0_REGNUM + 6; |
| 1637 | record_tdep->arg5 = PPC_R0_REGNUM + 7; |
| 1638 | record_tdep->arg6 = PPC_R0_REGNUM + 8; |
| 1639 | |
| 1640 | /* These values are the second argument of system call "sys_ioctl". |
| 1641 | They are obtained from Linux Kernel source. |
| 1642 | See arch/powerpc/include/uapi/asm/ioctls.h. */ |
| 1643 | record_tdep->ioctl_TCGETS = 0x403c7413; |
| 1644 | record_tdep->ioctl_TCSETS = 0x803c7414; |
| 1645 | record_tdep->ioctl_TCSETSW = 0x803c7415; |
| 1646 | record_tdep->ioctl_TCSETSF = 0x803c7416; |
| 1647 | record_tdep->ioctl_TCGETA = 0x40147417; |
| 1648 | record_tdep->ioctl_TCSETA = 0x80147418; |
| 1649 | record_tdep->ioctl_TCSETAW = 0x80147419; |
| 1650 | record_tdep->ioctl_TCSETAF = 0x8014741c; |
| 1651 | record_tdep->ioctl_TCSBRK = 0x2000741d; |
| 1652 | record_tdep->ioctl_TCXONC = 0x2000741e; |
| 1653 | record_tdep->ioctl_TCFLSH = 0x2000741f; |
| 1654 | record_tdep->ioctl_TIOCEXCL = 0x540c; |
| 1655 | record_tdep->ioctl_TIOCNXCL = 0x540d; |
| 1656 | record_tdep->ioctl_TIOCSCTTY = 0x540e; |
| 1657 | record_tdep->ioctl_TIOCGPGRP = 0x40047477; |
| 1658 | record_tdep->ioctl_TIOCSPGRP = 0x80047476; |
| 1659 | record_tdep->ioctl_TIOCOUTQ = 0x40047473; |
| 1660 | record_tdep->ioctl_TIOCSTI = 0x5412; |
| 1661 | record_tdep->ioctl_TIOCGWINSZ = 0x40087468; |
| 1662 | record_tdep->ioctl_TIOCSWINSZ = 0x80087467; |
| 1663 | record_tdep->ioctl_TIOCMGET = 0x5415; |
| 1664 | record_tdep->ioctl_TIOCMBIS = 0x5416; |
| 1665 | record_tdep->ioctl_TIOCMBIC = 0x5417; |
| 1666 | record_tdep->ioctl_TIOCMSET = 0x5418; |
| 1667 | record_tdep->ioctl_TIOCGSOFTCAR = 0x5419; |
| 1668 | record_tdep->ioctl_TIOCSSOFTCAR = 0x541a; |
| 1669 | record_tdep->ioctl_FIONREAD = 0x4004667f; |
| 1670 | record_tdep->ioctl_TIOCINQ = 0x4004667f; |
| 1671 | record_tdep->ioctl_TIOCLINUX = 0x541c; |
| 1672 | record_tdep->ioctl_TIOCCONS = 0x541d; |
| 1673 | record_tdep->ioctl_TIOCGSERIAL = 0x541e; |
| 1674 | record_tdep->ioctl_TIOCSSERIAL = 0x541f; |
| 1675 | record_tdep->ioctl_TIOCPKT = 0x5420; |
| 1676 | record_tdep->ioctl_FIONBIO = 0x8004667e; |
| 1677 | record_tdep->ioctl_TIOCNOTTY = 0x5422; |
| 1678 | record_tdep->ioctl_TIOCSETD = 0x5423; |
| 1679 | record_tdep->ioctl_TIOCGETD = 0x5424; |
| 1680 | record_tdep->ioctl_TCSBRKP = 0x5425; |
| 1681 | record_tdep->ioctl_TIOCSBRK = 0x5427; |
| 1682 | record_tdep->ioctl_TIOCCBRK = 0x5428; |
| 1683 | record_tdep->ioctl_TIOCGSID = 0x5429; |
| 1684 | record_tdep->ioctl_TIOCGPTN = 0x40045430; |
| 1685 | record_tdep->ioctl_TIOCSPTLCK = 0x80045431; |
| 1686 | record_tdep->ioctl_FIONCLEX = 0x20006602; |
| 1687 | record_tdep->ioctl_FIOCLEX = 0x20006601; |
| 1688 | record_tdep->ioctl_FIOASYNC = 0x8004667d; |
| 1689 | record_tdep->ioctl_TIOCSERCONFIG = 0x5453; |
| 1690 | record_tdep->ioctl_TIOCSERGWILD = 0x5454; |
| 1691 | record_tdep->ioctl_TIOCSERSWILD = 0x5455; |
| 1692 | record_tdep->ioctl_TIOCGLCKTRMIOS = 0x5456; |
| 1693 | record_tdep->ioctl_TIOCSLCKTRMIOS = 0x5457; |
| 1694 | record_tdep->ioctl_TIOCSERGSTRUCT = 0x5458; |
| 1695 | record_tdep->ioctl_TIOCSERGETLSR = 0x5459; |
| 1696 | record_tdep->ioctl_TIOCSERGETMULTI = 0x545a; |
| 1697 | record_tdep->ioctl_TIOCSERSETMULTI = 0x545b; |
| 1698 | record_tdep->ioctl_TIOCMIWAIT = 0x545c; |
| 1699 | record_tdep->ioctl_TIOCGICOUNT = 0x545d; |
| 1700 | record_tdep->ioctl_FIOQSIZE = 0x40086680; |
| 1701 | } |
| 1702 | |
| 1703 | /* Return a floating-point format for a floating-point variable of |
| 1704 | length LEN in bits. If non-NULL, NAME is the name of its type. |
| 1705 | If no suitable type is found, return NULL. */ |
| 1706 | |
| 1707 | const struct floatformat ** |
| 1708 | ppc_floatformat_for_type (struct gdbarch *gdbarch, |
| 1709 | const char *name, int len) |
| 1710 | { |
| 1711 | if (len == 128 && name) |
| 1712 | { |
| 1713 | if (strcmp (name, "__float128") == 0 |
| 1714 | || strcmp (name, "_Float128") == 0 |
| 1715 | || strcmp (name, "_Float64x") == 0 |
| 1716 | || strcmp (name, "complex _Float128") == 0 |
| 1717 | || strcmp (name, "complex _Float64x") == 0) |
| 1718 | return floatformats_ia64_quad; |
| 1719 | |
| 1720 | if (strcmp (name, "__ibm128") == 0) |
| 1721 | return floatformats_ibm_long_double; |
| 1722 | } |
| 1723 | |
| 1724 | return default_floatformat_for_type (gdbarch, name, len); |
| 1725 | } |
| 1726 | |
| 1727 | static void |
| 1728 | ppc_linux_init_abi (struct gdbarch_info info, |
| 1729 | struct gdbarch *gdbarch) |
| 1730 | { |
| 1731 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1732 | struct tdesc_arch_data *tdesc_data = info.tdesc_data; |
| 1733 | static const char *const stap_integer_prefixes[] = { "i", NULL }; |
| 1734 | static const char *const stap_register_indirection_prefixes[] = { "(", |
| 1735 | NULL }; |
| 1736 | static const char *const stap_register_indirection_suffixes[] = { ")", |
| 1737 | NULL }; |
| 1738 | |
| 1739 | linux_init_abi (info, gdbarch); |
| 1740 | |
| 1741 | /* PPC GNU/Linux uses either 64-bit or 128-bit long doubles; where |
| 1742 | 128-bit, they can be either IBM long double or IEEE quad long double. |
| 1743 | The 64-bit long double case will be detected automatically using |
| 1744 | the size specified in debug info. We use a .gnu.attribute flag |
| 1745 | to distinguish between the IBM long double and IEEE quad cases. */ |
| 1746 | set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT); |
| 1747 | if (tdep->long_double_abi == POWERPC_LONG_DOUBLE_IEEE128) |
| 1748 | set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); |
| 1749 | else |
| 1750 | set_gdbarch_long_double_format (gdbarch, floatformats_ibm_long_double); |
| 1751 | |
| 1752 | /* Support for floating-point data type variants. */ |
| 1753 | set_gdbarch_floatformat_for_type (gdbarch, ppc_floatformat_for_type); |
| 1754 | |
| 1755 | /* Handle inferior calls during interrupted system calls. */ |
| 1756 | set_gdbarch_write_pc (gdbarch, ppc_linux_write_pc); |
| 1757 | |
| 1758 | /* Get the syscall number from the arch's register. */ |
| 1759 | set_gdbarch_get_syscall_number (gdbarch, ppc_linux_get_syscall_number); |
| 1760 | |
| 1761 | /* SystemTap functions. */ |
| 1762 | set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes); |
| 1763 | set_gdbarch_stap_register_indirection_prefixes (gdbarch, |
| 1764 | stap_register_indirection_prefixes); |
| 1765 | set_gdbarch_stap_register_indirection_suffixes (gdbarch, |
| 1766 | stap_register_indirection_suffixes); |
| 1767 | set_gdbarch_stap_gdb_register_prefix (gdbarch, "r"); |
| 1768 | set_gdbarch_stap_is_single_operand (gdbarch, ppc_stap_is_single_operand); |
| 1769 | set_gdbarch_stap_parse_special_token (gdbarch, |
| 1770 | ppc_stap_parse_special_token); |
| 1771 | |
| 1772 | if (tdep->wordsize == 4) |
| 1773 | { |
| 1774 | /* Until November 2001, gcc did not comply with the 32 bit SysV |
| 1775 | R4 ABI requirement that structures less than or equal to 8 |
| 1776 | bytes should be returned in registers. Instead GCC was using |
| 1777 | the AIX/PowerOpen ABI - everything returned in memory |
| 1778 | (well ignoring vectors that is). When this was corrected, it |
| 1779 | wasn't fixed for GNU/Linux native platform. Use the |
| 1780 | PowerOpen struct convention. */ |
| 1781 | set_gdbarch_return_value (gdbarch, ppc_linux_return_value); |
| 1782 | |
| 1783 | set_gdbarch_memory_remove_breakpoint (gdbarch, |
| 1784 | ppc_linux_memory_remove_breakpoint); |
| 1785 | |
| 1786 | /* Shared library handling. */ |
| 1787 | set_gdbarch_skip_trampoline_code (gdbarch, ppc_skip_trampoline_code); |
| 1788 | set_solib_svr4_fetch_link_map_offsets |
| 1789 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); |
| 1790 | |
| 1791 | /* Setting the correct XML syscall filename. */ |
| 1792 | set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC); |
| 1793 | |
| 1794 | /* Trampolines. */ |
| 1795 | tramp_frame_prepend_unwinder (gdbarch, |
| 1796 | &ppc32_linux_sigaction_tramp_frame); |
| 1797 | tramp_frame_prepend_unwinder (gdbarch, |
| 1798 | &ppc32_linux_sighandler_tramp_frame); |
| 1799 | |
| 1800 | /* BFD target for core files. */ |
| 1801 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 1802 | set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpcle"); |
| 1803 | else |
| 1804 | set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpc"); |
| 1805 | |
| 1806 | if (powerpc_so_ops.in_dynsym_resolve_code == NULL) |
| 1807 | { |
| 1808 | powerpc_so_ops = svr4_so_ops; |
| 1809 | /* Override dynamic resolve function. */ |
| 1810 | powerpc_so_ops.in_dynsym_resolve_code = |
| 1811 | powerpc_linux_in_dynsym_resolve_code; |
| 1812 | } |
| 1813 | set_solib_ops (gdbarch, &powerpc_so_ops); |
| 1814 | |
| 1815 | set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); |
| 1816 | } |
| 1817 | |
| 1818 | if (tdep->wordsize == 8) |
| 1819 | { |
| 1820 | if (tdep->elf_abi == POWERPC_ELF_V1) |
| 1821 | { |
| 1822 | /* Handle PPC GNU/Linux 64-bit function pointers (which are really |
| 1823 | function descriptors). */ |
| 1824 | set_gdbarch_convert_from_func_ptr_addr |
| 1825 | (gdbarch, ppc64_convert_from_func_ptr_addr); |
| 1826 | |
| 1827 | set_gdbarch_elf_make_msymbol_special |
| 1828 | (gdbarch, ppc64_elf_make_msymbol_special); |
| 1829 | } |
| 1830 | else |
| 1831 | { |
| 1832 | set_gdbarch_elf_make_msymbol_special |
| 1833 | (gdbarch, ppc_elfv2_elf_make_msymbol_special); |
| 1834 | |
| 1835 | set_gdbarch_skip_entrypoint (gdbarch, ppc_elfv2_skip_entrypoint); |
| 1836 | } |
| 1837 | |
| 1838 | /* Shared library handling. */ |
| 1839 | set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code); |
| 1840 | set_solib_svr4_fetch_link_map_offsets |
| 1841 | (gdbarch, svr4_lp64_fetch_link_map_offsets); |
| 1842 | |
| 1843 | /* Setting the correct XML syscall filename. */ |
| 1844 | set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC64); |
| 1845 | |
| 1846 | /* Trampolines. */ |
| 1847 | tramp_frame_prepend_unwinder (gdbarch, |
| 1848 | &ppc64_linux_sigaction_tramp_frame); |
| 1849 | tramp_frame_prepend_unwinder (gdbarch, |
| 1850 | &ppc64_linux_sighandler_tramp_frame); |
| 1851 | |
| 1852 | /* BFD target for core files. */ |
| 1853 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 1854 | set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpcle"); |
| 1855 | else |
| 1856 | set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc"); |
| 1857 | } |
| 1858 | |
| 1859 | set_gdbarch_core_read_description (gdbarch, ppc_linux_core_read_description); |
| 1860 | set_gdbarch_iterate_over_regset_sections (gdbarch, |
| 1861 | ppc_linux_iterate_over_regset_sections); |
| 1862 | |
| 1863 | /* Enable TLS support. */ |
| 1864 | set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| 1865 | svr4_fetch_objfile_link_map); |
| 1866 | |
| 1867 | if (tdesc_data) |
| 1868 | { |
| 1869 | const struct tdesc_feature *feature; |
| 1870 | |
| 1871 | /* If we have target-described registers, then we can safely |
| 1872 | reserve a number for PPC_ORIG_R3_REGNUM and PPC_TRAP_REGNUM |
| 1873 | (whether they are described or not). */ |
| 1874 | gdb_assert (gdbarch_num_regs (gdbarch) <= PPC_ORIG_R3_REGNUM); |
| 1875 | set_gdbarch_num_regs (gdbarch, PPC_TRAP_REGNUM + 1); |
| 1876 | |
| 1877 | /* If they are present, then assign them to the reserved number. */ |
| 1878 | feature = tdesc_find_feature (info.target_desc, |
| 1879 | "org.gnu.gdb.power.linux"); |
| 1880 | if (feature != NULL) |
| 1881 | { |
| 1882 | tdesc_numbered_register (feature, tdesc_data, |
| 1883 | PPC_ORIG_R3_REGNUM, "orig_r3"); |
| 1884 | tdesc_numbered_register (feature, tdesc_data, |
| 1885 | PPC_TRAP_REGNUM, "trap"); |
| 1886 | } |
| 1887 | } |
| 1888 | |
| 1889 | /* Enable Cell/B.E. if supported by the target. */ |
| 1890 | if (tdesc_compatible_p (info.target_desc, |
| 1891 | bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu))) |
| 1892 | { |
| 1893 | /* Cell/B.E. multi-architecture support. */ |
| 1894 | set_spu_solib_ops (gdbarch); |
| 1895 | |
| 1896 | /* Cell/B.E. cross-architecture unwinder support. */ |
| 1897 | frame_unwind_prepend_unwinder (gdbarch, &ppu2spu_unwind); |
| 1898 | |
| 1899 | /* We need to support more than "addr_bit" significant address bits |
| 1900 | in order to support SPUADDR_ADDR encoded values. */ |
| 1901 | set_gdbarch_significant_addr_bit (gdbarch, 64); |
| 1902 | } |
| 1903 | |
| 1904 | set_gdbarch_displaced_step_location (gdbarch, |
| 1905 | linux_displaced_step_location); |
| 1906 | |
| 1907 | /* Support reverse debugging. */ |
| 1908 | set_gdbarch_process_record (gdbarch, ppc_process_record); |
| 1909 | set_gdbarch_process_record_signal (gdbarch, ppc_linux_record_signal); |
| 1910 | tdep->ppc_syscall_record = ppc_linux_syscall_record; |
| 1911 | |
| 1912 | ppc_init_linux_record_tdep (&ppc_linux_record_tdep, 4); |
| 1913 | ppc_init_linux_record_tdep (&ppc64_linux_record_tdep, 8); |
| 1914 | } |
| 1915 | |
| 1916 | void |
| 1917 | _initialize_ppc_linux_tdep (void) |
| 1918 | { |
| 1919 | /* Register for all sub-familes of the POWER/PowerPC: 32-bit and |
| 1920 | 64-bit PowerPC, and the older rs6k. */ |
| 1921 | gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_LINUX, |
| 1922 | ppc_linux_init_abi); |
| 1923 | gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64, GDB_OSABI_LINUX, |
| 1924 | ppc_linux_init_abi); |
| 1925 | gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX, |
| 1926 | ppc_linux_init_abi); |
| 1927 | |
| 1928 | /* Attach to observers to track __spe_current_active_context. */ |
| 1929 | gdb::observers::inferior_created.attach (ppc_linux_spe_context_inferior_created); |
| 1930 | gdb::observers::solib_loaded.attach (ppc_linux_spe_context_solib_loaded); |
| 1931 | gdb::observers::solib_unloaded.attach (ppc_linux_spe_context_solib_unloaded); |
| 1932 | |
| 1933 | /* Initialize the Linux target descriptions. */ |
| 1934 | initialize_tdesc_powerpc_32l (); |
| 1935 | initialize_tdesc_powerpc_altivec32l (); |
| 1936 | initialize_tdesc_powerpc_cell32l (); |
| 1937 | initialize_tdesc_powerpc_vsx32l (); |
| 1938 | initialize_tdesc_powerpc_isa205_32l (); |
| 1939 | initialize_tdesc_powerpc_isa205_altivec32l (); |
| 1940 | initialize_tdesc_powerpc_isa205_vsx32l (); |
| 1941 | initialize_tdesc_powerpc_64l (); |
| 1942 | initialize_tdesc_powerpc_altivec64l (); |
| 1943 | initialize_tdesc_powerpc_cell64l (); |
| 1944 | initialize_tdesc_powerpc_vsx64l (); |
| 1945 | initialize_tdesc_powerpc_isa205_64l (); |
| 1946 | initialize_tdesc_powerpc_isa205_altivec64l (); |
| 1947 | initialize_tdesc_powerpc_isa205_vsx64l (); |
| 1948 | initialize_tdesc_powerpc_e500l (); |
| 1949 | } |