| 1 | /* GNU/Linux on ARM target support. |
| 2 | |
| 3 | Copyright (C) 1999-2019 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 "target.h" |
| 22 | #include "value.h" |
| 23 | #include "gdbtypes.h" |
| 24 | #include "gdbcore.h" |
| 25 | #include "frame.h" |
| 26 | #include "regcache.h" |
| 27 | #include "solib-svr4.h" |
| 28 | #include "osabi.h" |
| 29 | #include "regset.h" |
| 30 | #include "trad-frame.h" |
| 31 | #include "tramp-frame.h" |
| 32 | #include "breakpoint.h" |
| 33 | #include "auxv.h" |
| 34 | #include "xml-syscall.h" |
| 35 | |
| 36 | #include "aarch32-tdep.h" |
| 37 | #include "arch/arm.h" |
| 38 | #include "arch/arm-get-next-pcs.h" |
| 39 | #include "arch/arm-linux.h" |
| 40 | #include "arm-tdep.h" |
| 41 | #include "arm-linux-tdep.h" |
| 42 | #include "linux-tdep.h" |
| 43 | #include "glibc-tdep.h" |
| 44 | #include "arch-utils.h" |
| 45 | #include "inferior.h" |
| 46 | #include "infrun.h" |
| 47 | #include "gdbthread.h" |
| 48 | #include "symfile.h" |
| 49 | |
| 50 | #include "record-full.h" |
| 51 | #include "linux-record.h" |
| 52 | |
| 53 | #include "cli/cli-utils.h" |
| 54 | #include "stap-probe.h" |
| 55 | #include "parser-defs.h" |
| 56 | #include "user-regs.h" |
| 57 | #include <ctype.h> |
| 58 | #include "elf/common.h" |
| 59 | |
| 60 | /* Under ARM GNU/Linux the traditional way of performing a breakpoint |
| 61 | is to execute a particular software interrupt, rather than use a |
| 62 | particular undefined instruction to provoke a trap. Upon exection |
| 63 | of the software interrupt the kernel stops the inferior with a |
| 64 | SIGTRAP, and wakes the debugger. */ |
| 65 | |
| 66 | static const gdb_byte arm_linux_arm_le_breakpoint[] = { 0x01, 0x00, 0x9f, 0xef }; |
| 67 | |
| 68 | static const gdb_byte arm_linux_arm_be_breakpoint[] = { 0xef, 0x9f, 0x00, 0x01 }; |
| 69 | |
| 70 | /* However, the EABI syscall interface (new in Nov. 2005) does not look at |
| 71 | the operand of the swi if old-ABI compatibility is disabled. Therefore, |
| 72 | use an undefined instruction instead. This is supported as of kernel |
| 73 | version 2.5.70 (May 2003), so should be a safe assumption for EABI |
| 74 | binaries. */ |
| 75 | |
| 76 | static const gdb_byte eabi_linux_arm_le_breakpoint[] = { 0xf0, 0x01, 0xf0, 0xe7 }; |
| 77 | |
| 78 | static const gdb_byte eabi_linux_arm_be_breakpoint[] = { 0xe7, 0xf0, 0x01, 0xf0 }; |
| 79 | |
| 80 | /* All the kernels which support Thumb support using a specific undefined |
| 81 | instruction for the Thumb breakpoint. */ |
| 82 | |
| 83 | static const gdb_byte arm_linux_thumb_be_breakpoint[] = {0xde, 0x01}; |
| 84 | |
| 85 | static const gdb_byte arm_linux_thumb_le_breakpoint[] = {0x01, 0xde}; |
| 86 | |
| 87 | /* Because the 16-bit Thumb breakpoint is affected by Thumb-2 IT blocks, |
| 88 | we must use a length-appropriate breakpoint for 32-bit Thumb |
| 89 | instructions. See also thumb_get_next_pc. */ |
| 90 | |
| 91 | static const gdb_byte arm_linux_thumb2_be_breakpoint[] = { 0xf7, 0xf0, 0xa0, 0x00 }; |
| 92 | |
| 93 | static const gdb_byte arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 }; |
| 94 | |
| 95 | /* Description of the longjmp buffer. The buffer is treated as an array of |
| 96 | elements of size ARM_LINUX_JB_ELEMENT_SIZE. |
| 97 | |
| 98 | The location of saved registers in this buffer (in particular the PC |
| 99 | to use after longjmp is called) varies depending on the ABI (in |
| 100 | particular the FP model) and also (possibly) the C Library. |
| 101 | |
| 102 | For glibc, eglibc, and uclibc the following holds: If the FP model is |
| 103 | SoftVFP or VFP (which implies EABI) then the PC is at offset 9 in the |
| 104 | buffer. This is also true for the SoftFPA model. However, for the FPA |
| 105 | model the PC is at offset 21 in the buffer. */ |
| 106 | #define ARM_LINUX_JB_ELEMENT_SIZE ARM_INT_REGISTER_SIZE |
| 107 | #define ARM_LINUX_JB_PC_FPA 21 |
| 108 | #define ARM_LINUX_JB_PC_EABI 9 |
| 109 | |
| 110 | /* |
| 111 | Dynamic Linking on ARM GNU/Linux |
| 112 | -------------------------------- |
| 113 | |
| 114 | Note: PLT = procedure linkage table |
| 115 | GOT = global offset table |
| 116 | |
| 117 | As much as possible, ELF dynamic linking defers the resolution of |
| 118 | jump/call addresses until the last minute. The technique used is |
| 119 | inspired by the i386 ELF design, and is based on the following |
| 120 | constraints. |
| 121 | |
| 122 | 1) The calling technique should not force a change in the assembly |
| 123 | code produced for apps; it MAY cause changes in the way assembly |
| 124 | code is produced for position independent code (i.e. shared |
| 125 | libraries). |
| 126 | |
| 127 | 2) The technique must be such that all executable areas must not be |
| 128 | modified; and any modified areas must not be executed. |
| 129 | |
| 130 | To do this, there are three steps involved in a typical jump: |
| 131 | |
| 132 | 1) in the code |
| 133 | 2) through the PLT |
| 134 | 3) using a pointer from the GOT |
| 135 | |
| 136 | When the executable or library is first loaded, each GOT entry is |
| 137 | initialized to point to the code which implements dynamic name |
| 138 | resolution and code finding. This is normally a function in the |
| 139 | program interpreter (on ARM GNU/Linux this is usually |
| 140 | ld-linux.so.2, but it does not have to be). On the first |
| 141 | invocation, the function is located and the GOT entry is replaced |
| 142 | with the real function address. Subsequent calls go through steps |
| 143 | 1, 2 and 3 and end up calling the real code. |
| 144 | |
| 145 | 1) In the code: |
| 146 | |
| 147 | b function_call |
| 148 | bl function_call |
| 149 | |
| 150 | This is typical ARM code using the 26 bit relative branch or branch |
| 151 | and link instructions. The target of the instruction |
| 152 | (function_call is usually the address of the function to be called. |
| 153 | In position independent code, the target of the instruction is |
| 154 | actually an entry in the PLT when calling functions in a shared |
| 155 | library. Note that this call is identical to a normal function |
| 156 | call, only the target differs. |
| 157 | |
| 158 | 2) In the PLT: |
| 159 | |
| 160 | The PLT is a synthetic area, created by the linker. It exists in |
| 161 | both executables and libraries. It is an array of stubs, one per |
| 162 | imported function call. It looks like this: |
| 163 | |
| 164 | PLT[0]: |
| 165 | str lr, [sp, #-4]! @push the return address (lr) |
| 166 | ldr lr, [pc, #16] @load from 6 words ahead |
| 167 | add lr, pc, lr @form an address for GOT[0] |
| 168 | ldr pc, [lr, #8]! @jump to the contents of that addr |
| 169 | |
| 170 | The return address (lr) is pushed on the stack and used for |
| 171 | calculations. The load on the second line loads the lr with |
| 172 | &GOT[3] - . - 20. The addition on the third leaves: |
| 173 | |
| 174 | lr = (&GOT[3] - . - 20) + (. + 8) |
| 175 | lr = (&GOT[3] - 12) |
| 176 | lr = &GOT[0] |
| 177 | |
| 178 | On the fourth line, the pc and lr are both updated, so that: |
| 179 | |
| 180 | pc = GOT[2] |
| 181 | lr = &GOT[0] + 8 |
| 182 | = &GOT[2] |
| 183 | |
| 184 | NOTE: PLT[0] borrows an offset .word from PLT[1]. This is a little |
| 185 | "tight", but allows us to keep all the PLT entries the same size. |
| 186 | |
| 187 | PLT[n+1]: |
| 188 | ldr ip, [pc, #4] @load offset from gotoff |
| 189 | add ip, pc, ip @add the offset to the pc |
| 190 | ldr pc, [ip] @jump to that address |
| 191 | gotoff: .word GOT[n+3] - . |
| 192 | |
| 193 | The load on the first line, gets an offset from the fourth word of |
| 194 | the PLT entry. The add on the second line makes ip = &GOT[n+3], |
| 195 | which contains either a pointer to PLT[0] (the fixup trampoline) or |
| 196 | a pointer to the actual code. |
| 197 | |
| 198 | 3) In the GOT: |
| 199 | |
| 200 | The GOT contains helper pointers for both code (PLT) fixups and |
| 201 | data fixups. The first 3 entries of the GOT are special. The next |
| 202 | M entries (where M is the number of entries in the PLT) belong to |
| 203 | the PLT fixups. The next D (all remaining) entries belong to |
| 204 | various data fixups. The actual size of the GOT is 3 + M + D. |
| 205 | |
| 206 | The GOT is also a synthetic area, created by the linker. It exists |
| 207 | in both executables and libraries. When the GOT is first |
| 208 | initialized , all the GOT entries relating to PLT fixups are |
| 209 | pointing to code back at PLT[0]. |
| 210 | |
| 211 | The special entries in the GOT are: |
| 212 | |
| 213 | GOT[0] = linked list pointer used by the dynamic loader |
| 214 | GOT[1] = pointer to the reloc table for this module |
| 215 | GOT[2] = pointer to the fixup/resolver code |
| 216 | |
| 217 | The first invocation of function call comes through and uses the |
| 218 | fixup/resolver code. On the entry to the fixup/resolver code: |
| 219 | |
| 220 | ip = &GOT[n+3] |
| 221 | lr = &GOT[2] |
| 222 | stack[0] = return address (lr) of the function call |
| 223 | [r0, r1, r2, r3] are still the arguments to the function call |
| 224 | |
| 225 | This is enough information for the fixup/resolver code to work |
| 226 | with. Before the fixup/resolver code returns, it actually calls |
| 227 | the requested function and repairs &GOT[n+3]. */ |
| 228 | |
| 229 | /* The constants below were determined by examining the following files |
| 230 | in the linux kernel sources: |
| 231 | |
| 232 | arch/arm/kernel/signal.c |
| 233 | - see SWI_SYS_SIGRETURN and SWI_SYS_RT_SIGRETURN |
| 234 | include/asm-arm/unistd.h |
| 235 | - see __NR_sigreturn, __NR_rt_sigreturn, and __NR_SYSCALL_BASE */ |
| 236 | |
| 237 | #define ARM_LINUX_SIGRETURN_INSTR 0xef900077 |
| 238 | #define ARM_LINUX_RT_SIGRETURN_INSTR 0xef9000ad |
| 239 | |
| 240 | /* For ARM EABI, the syscall number is not in the SWI instruction |
| 241 | (instead it is loaded into r7). We recognize the pattern that |
| 242 | glibc uses... alternatively, we could arrange to do this by |
| 243 | function name, but they are not always exported. */ |
| 244 | #define ARM_SET_R7_SIGRETURN 0xe3a07077 |
| 245 | #define ARM_SET_R7_RT_SIGRETURN 0xe3a070ad |
| 246 | #define ARM_EABI_SYSCALL 0xef000000 |
| 247 | |
| 248 | /* Equivalent patterns for Thumb2. */ |
| 249 | #define THUMB2_SET_R7_SIGRETURN1 0xf04f |
| 250 | #define THUMB2_SET_R7_SIGRETURN2 0x0777 |
| 251 | #define THUMB2_SET_R7_RT_SIGRETURN1 0xf04f |
| 252 | #define THUMB2_SET_R7_RT_SIGRETURN2 0x07ad |
| 253 | #define THUMB2_EABI_SYSCALL 0xdf00 |
| 254 | |
| 255 | /* OABI syscall restart trampoline, used for EABI executables too |
| 256 | whenever OABI support has been enabled in the kernel. */ |
| 257 | #define ARM_OABI_SYSCALL_RESTART_SYSCALL 0xef900000 |
| 258 | #define ARM_LDR_PC_SP_12 0xe49df00c |
| 259 | #define ARM_LDR_PC_SP_4 0xe49df004 |
| 260 | |
| 261 | /* Syscall number for sigreturn. */ |
| 262 | #define ARM_SIGRETURN 119 |
| 263 | /* Syscall number for rt_sigreturn. */ |
| 264 | #define ARM_RT_SIGRETURN 173 |
| 265 | |
| 266 | static CORE_ADDR |
| 267 | arm_linux_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self); |
| 268 | |
| 269 | /* Operation function pointers for get_next_pcs. */ |
| 270 | static struct arm_get_next_pcs_ops arm_linux_get_next_pcs_ops = { |
| 271 | arm_get_next_pcs_read_memory_unsigned_integer, |
| 272 | arm_linux_get_next_pcs_syscall_next_pc, |
| 273 | arm_get_next_pcs_addr_bits_remove, |
| 274 | arm_get_next_pcs_is_thumb, |
| 275 | arm_linux_get_next_pcs_fixup, |
| 276 | }; |
| 277 | |
| 278 | static void |
| 279 | arm_linux_sigtramp_cache (struct frame_info *this_frame, |
| 280 | struct trad_frame_cache *this_cache, |
| 281 | CORE_ADDR func, int regs_offset) |
| 282 | { |
| 283 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM); |
| 284 | CORE_ADDR base = sp + regs_offset; |
| 285 | int i; |
| 286 | |
| 287 | for (i = 0; i < 16; i++) |
| 288 | trad_frame_set_reg_addr (this_cache, i, base + i * 4); |
| 289 | |
| 290 | trad_frame_set_reg_addr (this_cache, ARM_PS_REGNUM, base + 16 * 4); |
| 291 | |
| 292 | /* The VFP or iWMMXt registers may be saved on the stack, but there's |
| 293 | no reliable way to restore them (yet). */ |
| 294 | |
| 295 | /* Save a frame ID. */ |
| 296 | trad_frame_set_id (this_cache, frame_id_build (sp, func)); |
| 297 | } |
| 298 | |
| 299 | /* See arm-linux.h for stack layout details. */ |
| 300 | static void |
| 301 | arm_linux_sigreturn_init (const struct tramp_frame *self, |
| 302 | struct frame_info *this_frame, |
| 303 | struct trad_frame_cache *this_cache, |
| 304 | CORE_ADDR func) |
| 305 | { |
| 306 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 307 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 308 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM); |
| 309 | ULONGEST uc_flags = read_memory_unsigned_integer (sp, 4, byte_order); |
| 310 | |
| 311 | if (uc_flags == ARM_NEW_SIGFRAME_MAGIC) |
| 312 | arm_linux_sigtramp_cache (this_frame, this_cache, func, |
| 313 | ARM_UCONTEXT_SIGCONTEXT |
| 314 | + ARM_SIGCONTEXT_R0); |
| 315 | else |
| 316 | arm_linux_sigtramp_cache (this_frame, this_cache, func, |
| 317 | ARM_SIGCONTEXT_R0); |
| 318 | } |
| 319 | |
| 320 | static void |
| 321 | arm_linux_rt_sigreturn_init (const struct tramp_frame *self, |
| 322 | struct frame_info *this_frame, |
| 323 | struct trad_frame_cache *this_cache, |
| 324 | CORE_ADDR func) |
| 325 | { |
| 326 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 327 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 328 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM); |
| 329 | ULONGEST pinfo = read_memory_unsigned_integer (sp, 4, byte_order); |
| 330 | |
| 331 | if (pinfo == sp + ARM_OLD_RT_SIGFRAME_SIGINFO) |
| 332 | arm_linux_sigtramp_cache (this_frame, this_cache, func, |
| 333 | ARM_OLD_RT_SIGFRAME_UCONTEXT |
| 334 | + ARM_UCONTEXT_SIGCONTEXT |
| 335 | + ARM_SIGCONTEXT_R0); |
| 336 | else |
| 337 | arm_linux_sigtramp_cache (this_frame, this_cache, func, |
| 338 | ARM_NEW_RT_SIGFRAME_UCONTEXT |
| 339 | + ARM_UCONTEXT_SIGCONTEXT |
| 340 | + ARM_SIGCONTEXT_R0); |
| 341 | } |
| 342 | |
| 343 | static void |
| 344 | arm_linux_restart_syscall_init (const struct tramp_frame *self, |
| 345 | struct frame_info *this_frame, |
| 346 | struct trad_frame_cache *this_cache, |
| 347 | CORE_ADDR func) |
| 348 | { |
| 349 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 350 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, ARM_SP_REGNUM); |
| 351 | CORE_ADDR pc = get_frame_memory_unsigned (this_frame, sp, 4); |
| 352 | CORE_ADDR cpsr = get_frame_register_unsigned (this_frame, ARM_PS_REGNUM); |
| 353 | ULONGEST t_bit = arm_psr_thumb_bit (gdbarch); |
| 354 | int sp_offset; |
| 355 | |
| 356 | /* There are two variants of this trampoline; with older kernels, the |
| 357 | stub is placed on the stack, while newer kernels use the stub from |
| 358 | the vector page. They are identical except that the older version |
| 359 | increments SP by 12 (to skip stored PC and the stub itself), while |
| 360 | the newer version increments SP only by 4 (just the stored PC). */ |
| 361 | if (self->insn[1].bytes == ARM_LDR_PC_SP_4) |
| 362 | sp_offset = 4; |
| 363 | else |
| 364 | sp_offset = 12; |
| 365 | |
| 366 | /* Update Thumb bit in CPSR. */ |
| 367 | if (pc & 1) |
| 368 | cpsr |= t_bit; |
| 369 | else |
| 370 | cpsr &= ~t_bit; |
| 371 | |
| 372 | /* Remove Thumb bit from PC. */ |
| 373 | pc = gdbarch_addr_bits_remove (gdbarch, pc); |
| 374 | |
| 375 | /* Save previous register values. */ |
| 376 | trad_frame_set_reg_value (this_cache, ARM_SP_REGNUM, sp + sp_offset); |
| 377 | trad_frame_set_reg_value (this_cache, ARM_PC_REGNUM, pc); |
| 378 | trad_frame_set_reg_value (this_cache, ARM_PS_REGNUM, cpsr); |
| 379 | |
| 380 | /* Save a frame ID. */ |
| 381 | trad_frame_set_id (this_cache, frame_id_build (sp, func)); |
| 382 | } |
| 383 | |
| 384 | static struct tramp_frame arm_linux_sigreturn_tramp_frame = { |
| 385 | SIGTRAMP_FRAME, |
| 386 | 4, |
| 387 | { |
| 388 | { ARM_LINUX_SIGRETURN_INSTR, ULONGEST_MAX }, |
| 389 | { TRAMP_SENTINEL_INSN } |
| 390 | }, |
| 391 | arm_linux_sigreturn_init |
| 392 | }; |
| 393 | |
| 394 | static struct tramp_frame arm_linux_rt_sigreturn_tramp_frame = { |
| 395 | SIGTRAMP_FRAME, |
| 396 | 4, |
| 397 | { |
| 398 | { ARM_LINUX_RT_SIGRETURN_INSTR, ULONGEST_MAX }, |
| 399 | { TRAMP_SENTINEL_INSN } |
| 400 | }, |
| 401 | arm_linux_rt_sigreturn_init |
| 402 | }; |
| 403 | |
| 404 | static struct tramp_frame arm_eabi_linux_sigreturn_tramp_frame = { |
| 405 | SIGTRAMP_FRAME, |
| 406 | 4, |
| 407 | { |
| 408 | { ARM_SET_R7_SIGRETURN, ULONGEST_MAX }, |
| 409 | { ARM_EABI_SYSCALL, ULONGEST_MAX }, |
| 410 | { TRAMP_SENTINEL_INSN } |
| 411 | }, |
| 412 | arm_linux_sigreturn_init |
| 413 | }; |
| 414 | |
| 415 | static struct tramp_frame arm_eabi_linux_rt_sigreturn_tramp_frame = { |
| 416 | SIGTRAMP_FRAME, |
| 417 | 4, |
| 418 | { |
| 419 | { ARM_SET_R7_RT_SIGRETURN, ULONGEST_MAX }, |
| 420 | { ARM_EABI_SYSCALL, ULONGEST_MAX }, |
| 421 | { TRAMP_SENTINEL_INSN } |
| 422 | }, |
| 423 | arm_linux_rt_sigreturn_init |
| 424 | }; |
| 425 | |
| 426 | static struct tramp_frame thumb2_eabi_linux_sigreturn_tramp_frame = { |
| 427 | SIGTRAMP_FRAME, |
| 428 | 2, |
| 429 | { |
| 430 | { THUMB2_SET_R7_SIGRETURN1, ULONGEST_MAX }, |
| 431 | { THUMB2_SET_R7_SIGRETURN2, ULONGEST_MAX }, |
| 432 | { THUMB2_EABI_SYSCALL, ULONGEST_MAX }, |
| 433 | { TRAMP_SENTINEL_INSN } |
| 434 | }, |
| 435 | arm_linux_sigreturn_init |
| 436 | }; |
| 437 | |
| 438 | static struct tramp_frame thumb2_eabi_linux_rt_sigreturn_tramp_frame = { |
| 439 | SIGTRAMP_FRAME, |
| 440 | 2, |
| 441 | { |
| 442 | { THUMB2_SET_R7_RT_SIGRETURN1, ULONGEST_MAX }, |
| 443 | { THUMB2_SET_R7_RT_SIGRETURN2, ULONGEST_MAX }, |
| 444 | { THUMB2_EABI_SYSCALL, ULONGEST_MAX }, |
| 445 | { TRAMP_SENTINEL_INSN } |
| 446 | }, |
| 447 | arm_linux_rt_sigreturn_init |
| 448 | }; |
| 449 | |
| 450 | static struct tramp_frame arm_linux_restart_syscall_tramp_frame = { |
| 451 | NORMAL_FRAME, |
| 452 | 4, |
| 453 | { |
| 454 | { ARM_OABI_SYSCALL_RESTART_SYSCALL, ULONGEST_MAX }, |
| 455 | { ARM_LDR_PC_SP_12, ULONGEST_MAX }, |
| 456 | { TRAMP_SENTINEL_INSN } |
| 457 | }, |
| 458 | arm_linux_restart_syscall_init |
| 459 | }; |
| 460 | |
| 461 | static struct tramp_frame arm_kernel_linux_restart_syscall_tramp_frame = { |
| 462 | NORMAL_FRAME, |
| 463 | 4, |
| 464 | { |
| 465 | { ARM_OABI_SYSCALL_RESTART_SYSCALL, ULONGEST_MAX }, |
| 466 | { ARM_LDR_PC_SP_4, ULONGEST_MAX }, |
| 467 | { TRAMP_SENTINEL_INSN } |
| 468 | }, |
| 469 | arm_linux_restart_syscall_init |
| 470 | }; |
| 471 | |
| 472 | /* Core file and register set support. */ |
| 473 | |
| 474 | #define ARM_LINUX_SIZEOF_GREGSET (18 * ARM_INT_REGISTER_SIZE) |
| 475 | |
| 476 | void |
| 477 | arm_linux_supply_gregset (const struct regset *regset, |
| 478 | struct regcache *regcache, |
| 479 | int regnum, const void *gregs_buf, size_t len) |
| 480 | { |
| 481 | struct gdbarch *gdbarch = regcache->arch (); |
| 482 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 483 | const gdb_byte *gregs = (const gdb_byte *) gregs_buf; |
| 484 | int regno; |
| 485 | CORE_ADDR reg_pc; |
| 486 | gdb_byte pc_buf[ARM_INT_REGISTER_SIZE]; |
| 487 | |
| 488 | for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++) |
| 489 | if (regnum == -1 || regnum == regno) |
| 490 | regcache->raw_supply (regno, gregs + ARM_INT_REGISTER_SIZE * regno); |
| 491 | |
| 492 | if (regnum == ARM_PS_REGNUM || regnum == -1) |
| 493 | { |
| 494 | if (arm_apcs_32) |
| 495 | regcache->raw_supply (ARM_PS_REGNUM, |
| 496 | gregs + ARM_INT_REGISTER_SIZE * ARM_CPSR_GREGNUM); |
| 497 | else |
| 498 | regcache->raw_supply (ARM_PS_REGNUM, |
| 499 | gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM); |
| 500 | } |
| 501 | |
| 502 | if (regnum == ARM_PC_REGNUM || regnum == -1) |
| 503 | { |
| 504 | reg_pc = extract_unsigned_integer ( |
| 505 | gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM, |
| 506 | ARM_INT_REGISTER_SIZE, byte_order); |
| 507 | reg_pc = gdbarch_addr_bits_remove (gdbarch, reg_pc); |
| 508 | store_unsigned_integer (pc_buf, ARM_INT_REGISTER_SIZE, byte_order, |
| 509 | reg_pc); |
| 510 | regcache->raw_supply (ARM_PC_REGNUM, pc_buf); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | void |
| 515 | arm_linux_collect_gregset (const struct regset *regset, |
| 516 | const struct regcache *regcache, |
| 517 | int regnum, void *gregs_buf, size_t len) |
| 518 | { |
| 519 | gdb_byte *gregs = (gdb_byte *) gregs_buf; |
| 520 | int regno; |
| 521 | |
| 522 | for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++) |
| 523 | if (regnum == -1 || regnum == regno) |
| 524 | regcache->raw_collect (regno, |
| 525 | gregs + ARM_INT_REGISTER_SIZE * regno); |
| 526 | |
| 527 | if (regnum == ARM_PS_REGNUM || regnum == -1) |
| 528 | { |
| 529 | if (arm_apcs_32) |
| 530 | regcache->raw_collect (ARM_PS_REGNUM, |
| 531 | gregs + ARM_INT_REGISTER_SIZE * ARM_CPSR_GREGNUM); |
| 532 | else |
| 533 | regcache->raw_collect (ARM_PS_REGNUM, |
| 534 | gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM); |
| 535 | } |
| 536 | |
| 537 | if (regnum == ARM_PC_REGNUM || regnum == -1) |
| 538 | regcache->raw_collect (ARM_PC_REGNUM, |
| 539 | gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM); |
| 540 | } |
| 541 | |
| 542 | /* Support for register format used by the NWFPE FPA emulator. */ |
| 543 | |
| 544 | #define typeNone 0x00 |
| 545 | #define typeSingle 0x01 |
| 546 | #define typeDouble 0x02 |
| 547 | #define typeExtended 0x03 |
| 548 | |
| 549 | void |
| 550 | supply_nwfpe_register (struct regcache *regcache, int regno, |
| 551 | const gdb_byte *regs) |
| 552 | { |
| 553 | const gdb_byte *reg_data; |
| 554 | gdb_byte reg_tag; |
| 555 | gdb_byte buf[ARM_FP_REGISTER_SIZE]; |
| 556 | |
| 557 | reg_data = regs + (regno - ARM_F0_REGNUM) * ARM_FP_REGISTER_SIZE; |
| 558 | reg_tag = regs[(regno - ARM_F0_REGNUM) + NWFPE_TAGS_OFFSET]; |
| 559 | memset (buf, 0, ARM_FP_REGISTER_SIZE); |
| 560 | |
| 561 | switch (reg_tag) |
| 562 | { |
| 563 | case typeSingle: |
| 564 | memcpy (buf, reg_data, 4); |
| 565 | break; |
| 566 | case typeDouble: |
| 567 | memcpy (buf, reg_data + 4, 4); |
| 568 | memcpy (buf + 4, reg_data, 4); |
| 569 | break; |
| 570 | case typeExtended: |
| 571 | /* We want sign and exponent, then least significant bits, |
| 572 | then most significant. NWFPE does sign, most, least. */ |
| 573 | memcpy (buf, reg_data, 4); |
| 574 | memcpy (buf + 4, reg_data + 8, 4); |
| 575 | memcpy (buf + 8, reg_data + 4, 4); |
| 576 | break; |
| 577 | default: |
| 578 | break; |
| 579 | } |
| 580 | |
| 581 | regcache->raw_supply (regno, buf); |
| 582 | } |
| 583 | |
| 584 | void |
| 585 | collect_nwfpe_register (const struct regcache *regcache, int regno, |
| 586 | gdb_byte *regs) |
| 587 | { |
| 588 | gdb_byte *reg_data; |
| 589 | gdb_byte reg_tag; |
| 590 | gdb_byte buf[ARM_FP_REGISTER_SIZE]; |
| 591 | |
| 592 | regcache->raw_collect (regno, buf); |
| 593 | |
| 594 | /* NOTE drow/2006-06-07: This code uses the tag already in the |
| 595 | register buffer. I've preserved that when moving the code |
| 596 | from the native file to the target file. But this doesn't |
| 597 | always make sense. */ |
| 598 | |
| 599 | reg_data = regs + (regno - ARM_F0_REGNUM) * ARM_FP_REGISTER_SIZE; |
| 600 | reg_tag = regs[(regno - ARM_F0_REGNUM) + NWFPE_TAGS_OFFSET]; |
| 601 | |
| 602 | switch (reg_tag) |
| 603 | { |
| 604 | case typeSingle: |
| 605 | memcpy (reg_data, buf, 4); |
| 606 | break; |
| 607 | case typeDouble: |
| 608 | memcpy (reg_data, buf + 4, 4); |
| 609 | memcpy (reg_data + 4, buf, 4); |
| 610 | break; |
| 611 | case typeExtended: |
| 612 | memcpy (reg_data, buf, 4); |
| 613 | memcpy (reg_data + 4, buf + 8, 4); |
| 614 | memcpy (reg_data + 8, buf + 4, 4); |
| 615 | break; |
| 616 | default: |
| 617 | break; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | void |
| 622 | arm_linux_supply_nwfpe (const struct regset *regset, |
| 623 | struct regcache *regcache, |
| 624 | int regnum, const void *regs_buf, size_t len) |
| 625 | { |
| 626 | const gdb_byte *regs = (const gdb_byte *) regs_buf; |
| 627 | int regno; |
| 628 | |
| 629 | if (regnum == ARM_FPS_REGNUM || regnum == -1) |
| 630 | regcache->raw_supply (ARM_FPS_REGNUM, |
| 631 | regs + NWFPE_FPSR_OFFSET); |
| 632 | |
| 633 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 634 | if (regnum == -1 || regnum == regno) |
| 635 | supply_nwfpe_register (regcache, regno, regs); |
| 636 | } |
| 637 | |
| 638 | void |
| 639 | arm_linux_collect_nwfpe (const struct regset *regset, |
| 640 | const struct regcache *regcache, |
| 641 | int regnum, void *regs_buf, size_t len) |
| 642 | { |
| 643 | gdb_byte *regs = (gdb_byte *) regs_buf; |
| 644 | int regno; |
| 645 | |
| 646 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 647 | if (regnum == -1 || regnum == regno) |
| 648 | collect_nwfpe_register (regcache, regno, regs); |
| 649 | |
| 650 | if (regnum == ARM_FPS_REGNUM || regnum == -1) |
| 651 | regcache->raw_collect (ARM_FPS_REGNUM, |
| 652 | regs + ARM_INT_REGISTER_SIZE * ARM_FPS_REGNUM); |
| 653 | } |
| 654 | |
| 655 | /* Support VFP register format. */ |
| 656 | |
| 657 | #define ARM_LINUX_SIZEOF_VFP (32 * 8 + 4) |
| 658 | |
| 659 | static void |
| 660 | arm_linux_supply_vfp (const struct regset *regset, |
| 661 | struct regcache *regcache, |
| 662 | int regnum, const void *regs_buf, size_t len) |
| 663 | { |
| 664 | const gdb_byte *regs = (const gdb_byte *) regs_buf; |
| 665 | int regno; |
| 666 | |
| 667 | if (regnum == ARM_FPSCR_REGNUM || regnum == -1) |
| 668 | regcache->raw_supply (ARM_FPSCR_REGNUM, regs + 32 * 8); |
| 669 | |
| 670 | for (regno = ARM_D0_REGNUM; regno <= ARM_D31_REGNUM; regno++) |
| 671 | if (regnum == -1 || regnum == regno) |
| 672 | regcache->raw_supply (regno, regs + (regno - ARM_D0_REGNUM) * 8); |
| 673 | } |
| 674 | |
| 675 | static void |
| 676 | arm_linux_collect_vfp (const struct regset *regset, |
| 677 | const struct regcache *regcache, |
| 678 | int regnum, void *regs_buf, size_t len) |
| 679 | { |
| 680 | gdb_byte *regs = (gdb_byte *) regs_buf; |
| 681 | int regno; |
| 682 | |
| 683 | if (regnum == ARM_FPSCR_REGNUM || regnum == -1) |
| 684 | regcache->raw_collect (ARM_FPSCR_REGNUM, regs + 32 * 8); |
| 685 | |
| 686 | for (regno = ARM_D0_REGNUM; regno <= ARM_D31_REGNUM; regno++) |
| 687 | if (regnum == -1 || regnum == regno) |
| 688 | regcache->raw_collect (regno, regs + (regno - ARM_D0_REGNUM) * 8); |
| 689 | } |
| 690 | |
| 691 | static const struct regset arm_linux_gregset = |
| 692 | { |
| 693 | NULL, arm_linux_supply_gregset, arm_linux_collect_gregset |
| 694 | }; |
| 695 | |
| 696 | static const struct regset arm_linux_fpregset = |
| 697 | { |
| 698 | NULL, arm_linux_supply_nwfpe, arm_linux_collect_nwfpe |
| 699 | }; |
| 700 | |
| 701 | static const struct regset arm_linux_vfpregset = |
| 702 | { |
| 703 | NULL, arm_linux_supply_vfp, arm_linux_collect_vfp |
| 704 | }; |
| 705 | |
| 706 | /* Iterate over core file register note sections. */ |
| 707 | |
| 708 | static void |
| 709 | arm_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, |
| 710 | iterate_over_regset_sections_cb *cb, |
| 711 | void *cb_data, |
| 712 | const struct regcache *regcache) |
| 713 | { |
| 714 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 715 | |
| 716 | cb (".reg", ARM_LINUX_SIZEOF_GREGSET, ARM_LINUX_SIZEOF_GREGSET, |
| 717 | &arm_linux_gregset, NULL, cb_data); |
| 718 | |
| 719 | if (tdep->vfp_register_count > 0) |
| 720 | cb (".reg-arm-vfp", ARM_LINUX_SIZEOF_VFP, ARM_LINUX_SIZEOF_VFP, |
| 721 | &arm_linux_vfpregset, "VFP floating-point", cb_data); |
| 722 | else if (tdep->have_fpa_registers) |
| 723 | cb (".reg2", ARM_LINUX_SIZEOF_NWFPE, ARM_LINUX_SIZEOF_NWFPE, |
| 724 | &arm_linux_fpregset, "FPA floating-point", cb_data); |
| 725 | } |
| 726 | |
| 727 | /* Determine target description from core file. */ |
| 728 | |
| 729 | static const struct target_desc * |
| 730 | arm_linux_core_read_description (struct gdbarch *gdbarch, |
| 731 | struct target_ops *target, |
| 732 | bfd *abfd) |
| 733 | { |
| 734 | CORE_ADDR arm_hwcap = linux_get_hwcap (target); |
| 735 | |
| 736 | if (arm_hwcap & HWCAP_VFP) |
| 737 | { |
| 738 | /* NEON implies VFPv3-D32 or no-VFP unit. Say that we only support |
| 739 | Neon with VFPv3-D32. */ |
| 740 | if (arm_hwcap & HWCAP_NEON) |
| 741 | return aarch32_read_description (); |
| 742 | else if ((arm_hwcap & (HWCAP_VFPv3 | HWCAP_VFPv3D16)) == HWCAP_VFPv3) |
| 743 | return arm_read_description (ARM_FP_TYPE_VFPV3); |
| 744 | |
| 745 | return arm_read_description (ARM_FP_TYPE_VFPV2); |
| 746 | } |
| 747 | |
| 748 | return nullptr; |
| 749 | } |
| 750 | |
| 751 | |
| 752 | /* Copy the value of next pc of sigreturn and rt_sigrturn into PC, |
| 753 | return 1. In addition, set IS_THUMB depending on whether we |
| 754 | will return to ARM or Thumb code. Return 0 if it is not a |
| 755 | rt_sigreturn/sigreturn syscall. */ |
| 756 | static int |
| 757 | arm_linux_sigreturn_return_addr (struct frame_info *frame, |
| 758 | unsigned long svc_number, |
| 759 | CORE_ADDR *pc, int *is_thumb) |
| 760 | { |
| 761 | /* Is this a sigreturn or rt_sigreturn syscall? */ |
| 762 | if (svc_number == 119 || svc_number == 173) |
| 763 | { |
| 764 | if (get_frame_type (frame) == SIGTRAMP_FRAME) |
| 765 | { |
| 766 | ULONGEST t_bit = arm_psr_thumb_bit (frame_unwind_arch (frame)); |
| 767 | CORE_ADDR cpsr |
| 768 | = frame_unwind_register_unsigned (frame, ARM_PS_REGNUM); |
| 769 | |
| 770 | *is_thumb = (cpsr & t_bit) != 0; |
| 771 | *pc = frame_unwind_caller_pc (frame); |
| 772 | return 1; |
| 773 | } |
| 774 | } |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | /* Find the value of the next PC after a sigreturn or rt_sigreturn syscall |
| 779 | based on current processor state. In addition, set IS_THUMB depending |
| 780 | on whether we will return to ARM or Thumb code. */ |
| 781 | |
| 782 | static CORE_ADDR |
| 783 | arm_linux_sigreturn_next_pc (struct regcache *regcache, |
| 784 | unsigned long svc_number, int *is_thumb) |
| 785 | { |
| 786 | ULONGEST sp; |
| 787 | unsigned long sp_data; |
| 788 | CORE_ADDR next_pc = 0; |
| 789 | struct gdbarch *gdbarch = regcache->arch (); |
| 790 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 791 | int pc_offset = 0; |
| 792 | int is_sigreturn = 0; |
| 793 | CORE_ADDR cpsr; |
| 794 | |
| 795 | gdb_assert (svc_number == ARM_SIGRETURN |
| 796 | || svc_number == ARM_RT_SIGRETURN); |
| 797 | |
| 798 | is_sigreturn = (svc_number == ARM_SIGRETURN); |
| 799 | regcache_cooked_read_unsigned (regcache, ARM_SP_REGNUM, &sp); |
| 800 | sp_data = read_memory_unsigned_integer (sp, 4, byte_order); |
| 801 | |
| 802 | pc_offset = arm_linux_sigreturn_next_pc_offset (sp, sp_data, svc_number, |
| 803 | is_sigreturn); |
| 804 | |
| 805 | next_pc = read_memory_unsigned_integer (sp + pc_offset, 4, byte_order); |
| 806 | |
| 807 | /* Set IS_THUMB according the CPSR saved on the stack. */ |
| 808 | cpsr = read_memory_unsigned_integer (sp + pc_offset + 4, 4, byte_order); |
| 809 | *is_thumb = ((cpsr & arm_psr_thumb_bit (gdbarch)) != 0); |
| 810 | |
| 811 | return next_pc; |
| 812 | } |
| 813 | |
| 814 | /* At a ptrace syscall-stop, return the syscall number. This either |
| 815 | comes from the SWI instruction (OABI) or from r7 (EABI). |
| 816 | |
| 817 | When the function fails, it should return -1. */ |
| 818 | |
| 819 | static LONGEST |
| 820 | arm_linux_get_syscall_number (struct gdbarch *gdbarch, |
| 821 | thread_info *thread) |
| 822 | { |
| 823 | struct regcache *regs = get_thread_regcache (thread); |
| 824 | |
| 825 | ULONGEST pc; |
| 826 | ULONGEST cpsr; |
| 827 | ULONGEST t_bit = arm_psr_thumb_bit (gdbarch); |
| 828 | int is_thumb; |
| 829 | ULONGEST svc_number = -1; |
| 830 | |
| 831 | regcache_cooked_read_unsigned (regs, ARM_PC_REGNUM, &pc); |
| 832 | regcache_cooked_read_unsigned (regs, ARM_PS_REGNUM, &cpsr); |
| 833 | is_thumb = (cpsr & t_bit) != 0; |
| 834 | |
| 835 | if (is_thumb) |
| 836 | { |
| 837 | regcache_cooked_read_unsigned (regs, 7, &svc_number); |
| 838 | } |
| 839 | else |
| 840 | { |
| 841 | enum bfd_endian byte_order_for_code = |
| 842 | gdbarch_byte_order_for_code (gdbarch); |
| 843 | |
| 844 | /* PC gets incremented before the syscall-stop, so read the |
| 845 | previous instruction. */ |
| 846 | unsigned long this_instr = |
| 847 | read_memory_unsigned_integer (pc - 4, 4, byte_order_for_code); |
| 848 | |
| 849 | unsigned long svc_operand = (0x00ffffff & this_instr); |
| 850 | |
| 851 | if (svc_operand) |
| 852 | { |
| 853 | /* OABI */ |
| 854 | svc_number = svc_operand - 0x900000; |
| 855 | } |
| 856 | else |
| 857 | { |
| 858 | /* EABI */ |
| 859 | regcache_cooked_read_unsigned (regs, 7, &svc_number); |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | return svc_number; |
| 864 | } |
| 865 | |
| 866 | static CORE_ADDR |
| 867 | arm_linux_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self) |
| 868 | { |
| 869 | CORE_ADDR next_pc = 0; |
| 870 | CORE_ADDR pc = regcache_read_pc (self->regcache); |
| 871 | int is_thumb = arm_is_thumb (self->regcache); |
| 872 | ULONGEST svc_number = 0; |
| 873 | |
| 874 | if (is_thumb) |
| 875 | { |
| 876 | svc_number = regcache_raw_get_unsigned (self->regcache, 7); |
| 877 | next_pc = pc + 2; |
| 878 | } |
| 879 | else |
| 880 | { |
| 881 | struct gdbarch *gdbarch = self->regcache->arch (); |
| 882 | enum bfd_endian byte_order_for_code = |
| 883 | gdbarch_byte_order_for_code (gdbarch); |
| 884 | unsigned long this_instr = |
| 885 | read_memory_unsigned_integer (pc, 4, byte_order_for_code); |
| 886 | |
| 887 | unsigned long svc_operand = (0x00ffffff & this_instr); |
| 888 | if (svc_operand) /* OABI. */ |
| 889 | { |
| 890 | svc_number = svc_operand - 0x900000; |
| 891 | } |
| 892 | else /* EABI. */ |
| 893 | { |
| 894 | svc_number = regcache_raw_get_unsigned (self->regcache, 7); |
| 895 | } |
| 896 | |
| 897 | next_pc = pc + 4; |
| 898 | } |
| 899 | |
| 900 | if (svc_number == ARM_SIGRETURN || svc_number == ARM_RT_SIGRETURN) |
| 901 | { |
| 902 | /* SIGRETURN or RT_SIGRETURN may affect the arm thumb mode, so |
| 903 | update IS_THUMB. */ |
| 904 | next_pc = arm_linux_sigreturn_next_pc (self->regcache, svc_number, |
| 905 | &is_thumb); |
| 906 | } |
| 907 | |
| 908 | /* Addresses for calling Thumb functions have the bit 0 set. */ |
| 909 | if (is_thumb) |
| 910 | next_pc = MAKE_THUMB_ADDR (next_pc); |
| 911 | |
| 912 | return next_pc; |
| 913 | } |
| 914 | |
| 915 | |
| 916 | /* Insert a single step breakpoint at the next executed instruction. */ |
| 917 | |
| 918 | static std::vector<CORE_ADDR> |
| 919 | arm_linux_software_single_step (struct regcache *regcache) |
| 920 | { |
| 921 | struct gdbarch *gdbarch = regcache->arch (); |
| 922 | struct arm_get_next_pcs next_pcs_ctx; |
| 923 | |
| 924 | /* If the target does have hardware single step, GDB doesn't have |
| 925 | to bother software single step. */ |
| 926 | if (target_can_do_single_step () == 1) |
| 927 | return {}; |
| 928 | |
| 929 | arm_get_next_pcs_ctor (&next_pcs_ctx, |
| 930 | &arm_linux_get_next_pcs_ops, |
| 931 | gdbarch_byte_order (gdbarch), |
| 932 | gdbarch_byte_order_for_code (gdbarch), |
| 933 | 1, |
| 934 | regcache); |
| 935 | |
| 936 | std::vector<CORE_ADDR> next_pcs = arm_get_next_pcs (&next_pcs_ctx); |
| 937 | |
| 938 | for (CORE_ADDR &pc_ref : next_pcs) |
| 939 | pc_ref = gdbarch_addr_bits_remove (gdbarch, pc_ref); |
| 940 | |
| 941 | return next_pcs; |
| 942 | } |
| 943 | |
| 944 | /* Support for displaced stepping of Linux SVC instructions. */ |
| 945 | |
| 946 | static void |
| 947 | arm_linux_cleanup_svc (struct gdbarch *gdbarch, |
| 948 | struct regcache *regs, |
| 949 | arm_displaced_step_closure *dsc) |
| 950 | { |
| 951 | ULONGEST apparent_pc; |
| 952 | int within_scratch; |
| 953 | |
| 954 | regcache_cooked_read_unsigned (regs, ARM_PC_REGNUM, &apparent_pc); |
| 955 | |
| 956 | within_scratch = (apparent_pc >= dsc->scratch_base |
| 957 | && apparent_pc < (dsc->scratch_base |
| 958 | + ARM_DISPLACED_MODIFIED_INSNS * 4 + 4)); |
| 959 | |
| 960 | if (debug_displaced) |
| 961 | { |
| 962 | fprintf_unfiltered (gdb_stdlog, "displaced: PC is apparently %.8lx after " |
| 963 | "SVC step ", (unsigned long) apparent_pc); |
| 964 | if (within_scratch) |
| 965 | fprintf_unfiltered (gdb_stdlog, "(within scratch space)\n"); |
| 966 | else |
| 967 | fprintf_unfiltered (gdb_stdlog, "(outside scratch space)\n"); |
| 968 | } |
| 969 | |
| 970 | if (within_scratch) |
| 971 | displaced_write_reg (regs, dsc, ARM_PC_REGNUM, |
| 972 | dsc->insn_addr + dsc->insn_size, BRANCH_WRITE_PC); |
| 973 | } |
| 974 | |
| 975 | static int |
| 976 | arm_linux_copy_svc (struct gdbarch *gdbarch, struct regcache *regs, |
| 977 | arm_displaced_step_closure *dsc) |
| 978 | { |
| 979 | CORE_ADDR return_to = 0; |
| 980 | |
| 981 | struct frame_info *frame; |
| 982 | unsigned int svc_number = displaced_read_reg (regs, dsc, 7); |
| 983 | int is_sigreturn = 0; |
| 984 | int is_thumb; |
| 985 | |
| 986 | frame = get_current_frame (); |
| 987 | |
| 988 | is_sigreturn = arm_linux_sigreturn_return_addr(frame, svc_number, |
| 989 | &return_to, &is_thumb); |
| 990 | if (is_sigreturn) |
| 991 | { |
| 992 | struct symtab_and_line sal; |
| 993 | |
| 994 | if (debug_displaced) |
| 995 | fprintf_unfiltered (gdb_stdlog, "displaced: found " |
| 996 | "sigreturn/rt_sigreturn SVC call. PC in " |
| 997 | "frame = %lx\n", |
| 998 | (unsigned long) get_frame_pc (frame)); |
| 999 | |
| 1000 | if (debug_displaced) |
| 1001 | fprintf_unfiltered (gdb_stdlog, "displaced: unwind pc = %lx. " |
| 1002 | "Setting momentary breakpoint.\n", |
| 1003 | (unsigned long) return_to); |
| 1004 | |
| 1005 | gdb_assert (inferior_thread ()->control.step_resume_breakpoint |
| 1006 | == NULL); |
| 1007 | |
| 1008 | sal = find_pc_line (return_to, 0); |
| 1009 | sal.pc = return_to; |
| 1010 | sal.section = find_pc_overlay (return_to); |
| 1011 | sal.explicit_pc = 1; |
| 1012 | |
| 1013 | frame = get_prev_frame (frame); |
| 1014 | |
| 1015 | if (frame) |
| 1016 | { |
| 1017 | inferior_thread ()->control.step_resume_breakpoint |
| 1018 | = set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame), |
| 1019 | bp_step_resume).release (); |
| 1020 | |
| 1021 | /* set_momentary_breakpoint invalidates FRAME. */ |
| 1022 | frame = NULL; |
| 1023 | |
| 1024 | /* We need to make sure we actually insert the momentary |
| 1025 | breakpoint set above. */ |
| 1026 | insert_breakpoints (); |
| 1027 | } |
| 1028 | else if (debug_displaced) |
| 1029 | fprintf_unfiltered (gdb_stderr, "displaced: couldn't find previous " |
| 1030 | "frame to set momentary breakpoint for " |
| 1031 | "sigreturn/rt_sigreturn\n"); |
| 1032 | } |
| 1033 | else if (debug_displaced) |
| 1034 | fprintf_unfiltered (gdb_stdlog, "displaced: found SVC call\n"); |
| 1035 | |
| 1036 | /* Preparation: If we detect sigreturn, set momentary breakpoint at resume |
| 1037 | location, else nothing. |
| 1038 | Insn: unmodified svc. |
| 1039 | Cleanup: if pc lands in scratch space, pc <- insn_addr + insn_size |
| 1040 | else leave pc alone. */ |
| 1041 | |
| 1042 | |
| 1043 | dsc->cleanup = &arm_linux_cleanup_svc; |
| 1044 | /* Pretend we wrote to the PC, so cleanup doesn't set PC to the next |
| 1045 | instruction. */ |
| 1046 | dsc->wrote_to_pc = 1; |
| 1047 | |
| 1048 | return 0; |
| 1049 | } |
| 1050 | |
| 1051 | |
| 1052 | /* The following two functions implement single-stepping over calls to Linux |
| 1053 | kernel helper routines, which perform e.g. atomic operations on architecture |
| 1054 | variants which don't support them natively. |
| 1055 | |
| 1056 | When this function is called, the PC will be pointing at the kernel helper |
| 1057 | (at an address inaccessible to GDB), and r14 will point to the return |
| 1058 | address. Displaced stepping always executes code in the copy area: |
| 1059 | so, make the copy-area instruction branch back to the kernel helper (the |
| 1060 | "from" address), and make r14 point to the breakpoint in the copy area. In |
| 1061 | that way, we regain control once the kernel helper returns, and can clean |
| 1062 | up appropriately (as if we had just returned from the kernel helper as it |
| 1063 | would have been called from the non-displaced location). */ |
| 1064 | |
| 1065 | static void |
| 1066 | cleanup_kernel_helper_return (struct gdbarch *gdbarch, |
| 1067 | struct regcache *regs, |
| 1068 | arm_displaced_step_closure *dsc) |
| 1069 | { |
| 1070 | displaced_write_reg (regs, dsc, ARM_LR_REGNUM, dsc->tmp[0], CANNOT_WRITE_PC); |
| 1071 | displaced_write_reg (regs, dsc, ARM_PC_REGNUM, dsc->tmp[0], BRANCH_WRITE_PC); |
| 1072 | } |
| 1073 | |
| 1074 | static void |
| 1075 | arm_catch_kernel_helper_return (struct gdbarch *gdbarch, CORE_ADDR from, |
| 1076 | CORE_ADDR to, struct regcache *regs, |
| 1077 | arm_displaced_step_closure *dsc) |
| 1078 | { |
| 1079 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1080 | |
| 1081 | dsc->numinsns = 1; |
| 1082 | dsc->insn_addr = from; |
| 1083 | dsc->cleanup = &cleanup_kernel_helper_return; |
| 1084 | /* Say we wrote to the PC, else cleanup will set PC to the next |
| 1085 | instruction in the helper, which isn't helpful. */ |
| 1086 | dsc->wrote_to_pc = 1; |
| 1087 | |
| 1088 | /* Preparation: tmp[0] <- r14 |
| 1089 | r14 <- <scratch space>+4 |
| 1090 | *(<scratch space>+8) <- from |
| 1091 | Insn: ldr pc, [r14, #4] |
| 1092 | Cleanup: r14 <- tmp[0], pc <- tmp[0]. */ |
| 1093 | |
| 1094 | dsc->tmp[0] = displaced_read_reg (regs, dsc, ARM_LR_REGNUM); |
| 1095 | displaced_write_reg (regs, dsc, ARM_LR_REGNUM, (ULONGEST) to + 4, |
| 1096 | CANNOT_WRITE_PC); |
| 1097 | write_memory_unsigned_integer (to + 8, 4, byte_order, from); |
| 1098 | |
| 1099 | dsc->modinsn[0] = 0xe59ef004; /* ldr pc, [lr, #4]. */ |
| 1100 | } |
| 1101 | |
| 1102 | /* Linux-specific displaced step instruction copying function. Detects when |
| 1103 | the program has stepped into a Linux kernel helper routine (which must be |
| 1104 | handled as a special case). */ |
| 1105 | |
| 1106 | static struct displaced_step_closure * |
| 1107 | arm_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, |
| 1108 | CORE_ADDR from, CORE_ADDR to, |
| 1109 | struct regcache *regs) |
| 1110 | { |
| 1111 | arm_displaced_step_closure *dsc = new arm_displaced_step_closure; |
| 1112 | |
| 1113 | /* Detect when we enter an (inaccessible by GDB) Linux kernel helper, and |
| 1114 | stop at the return location. */ |
| 1115 | if (from > 0xffff0000) |
| 1116 | { |
| 1117 | if (debug_displaced) |
| 1118 | fprintf_unfiltered (gdb_stdlog, "displaced: detected kernel helper " |
| 1119 | "at %.8lx\n", (unsigned long) from); |
| 1120 | |
| 1121 | arm_catch_kernel_helper_return (gdbarch, from, to, regs, dsc); |
| 1122 | } |
| 1123 | else |
| 1124 | { |
| 1125 | /* Override the default handling of SVC instructions. */ |
| 1126 | dsc->u.svc.copy_svc_os = arm_linux_copy_svc; |
| 1127 | |
| 1128 | arm_process_displaced_insn (gdbarch, from, to, regs, dsc); |
| 1129 | } |
| 1130 | |
| 1131 | arm_displaced_init_closure (gdbarch, from, to, dsc); |
| 1132 | |
| 1133 | return dsc; |
| 1134 | } |
| 1135 | |
| 1136 | /* Implementation of `gdbarch_stap_is_single_operand', as defined in |
| 1137 | gdbarch.h. */ |
| 1138 | |
| 1139 | static int |
| 1140 | arm_stap_is_single_operand (struct gdbarch *gdbarch, const char *s) |
| 1141 | { |
| 1142 | return (*s == '#' || *s == '$' || isdigit (*s) /* Literal number. */ |
| 1143 | || *s == '[' /* Register indirection or |
| 1144 | displacement. */ |
| 1145 | || isalpha (*s)); /* Register value. */ |
| 1146 | } |
| 1147 | |
| 1148 | /* This routine is used to parse a special token in ARM's assembly. |
| 1149 | |
| 1150 | The special tokens parsed by it are: |
| 1151 | |
| 1152 | - Register displacement (e.g, [fp, #-8]) |
| 1153 | |
| 1154 | It returns one if the special token has been parsed successfully, |
| 1155 | or zero if the current token is not considered special. */ |
| 1156 | |
| 1157 | static int |
| 1158 | arm_stap_parse_special_token (struct gdbarch *gdbarch, |
| 1159 | struct stap_parse_info *p) |
| 1160 | { |
| 1161 | if (*p->arg == '[') |
| 1162 | { |
| 1163 | /* Temporary holder for lookahead. */ |
| 1164 | const char *tmp = p->arg; |
| 1165 | char *endp; |
| 1166 | /* Used to save the register name. */ |
| 1167 | const char *start; |
| 1168 | char *regname; |
| 1169 | int len, offset; |
| 1170 | int got_minus = 0; |
| 1171 | long displacement; |
| 1172 | struct stoken str; |
| 1173 | |
| 1174 | ++tmp; |
| 1175 | start = tmp; |
| 1176 | |
| 1177 | /* Register name. */ |
| 1178 | while (isalnum (*tmp)) |
| 1179 | ++tmp; |
| 1180 | |
| 1181 | if (*tmp != ',') |
| 1182 | return 0; |
| 1183 | |
| 1184 | len = tmp - start; |
| 1185 | regname = (char *) alloca (len + 2); |
| 1186 | |
| 1187 | offset = 0; |
| 1188 | if (isdigit (*start)) |
| 1189 | { |
| 1190 | /* If we are dealing with a register whose name begins with a |
| 1191 | digit, it means we should prefix the name with the letter |
| 1192 | `r', because GDB expects this name pattern. Otherwise (e.g., |
| 1193 | we are dealing with the register `fp'), we don't need to |
| 1194 | add such a prefix. */ |
| 1195 | regname[0] = 'r'; |
| 1196 | offset = 1; |
| 1197 | } |
| 1198 | |
| 1199 | strncpy (regname + offset, start, len); |
| 1200 | len += offset; |
| 1201 | regname[len] = '\0'; |
| 1202 | |
| 1203 | if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1) |
| 1204 | error (_("Invalid register name `%s' on expression `%s'."), |
| 1205 | regname, p->saved_arg); |
| 1206 | |
| 1207 | ++tmp; |
| 1208 | tmp = skip_spaces (tmp); |
| 1209 | if (*tmp == '#' || *tmp == '$') |
| 1210 | ++tmp; |
| 1211 | |
| 1212 | if (*tmp == '-') |
| 1213 | { |
| 1214 | ++tmp; |
| 1215 | got_minus = 1; |
| 1216 | } |
| 1217 | |
| 1218 | displacement = strtol (tmp, &endp, 10); |
| 1219 | tmp = endp; |
| 1220 | |
| 1221 | /* Skipping last `]'. */ |
| 1222 | if (*tmp++ != ']') |
| 1223 | return 0; |
| 1224 | |
| 1225 | /* The displacement. */ |
| 1226 | write_exp_elt_opcode (&p->pstate, OP_LONG); |
| 1227 | write_exp_elt_type (&p->pstate, builtin_type (gdbarch)->builtin_long); |
| 1228 | write_exp_elt_longcst (&p->pstate, displacement); |
| 1229 | write_exp_elt_opcode (&p->pstate, OP_LONG); |
| 1230 | if (got_minus) |
| 1231 | write_exp_elt_opcode (&p->pstate, UNOP_NEG); |
| 1232 | |
| 1233 | /* The register name. */ |
| 1234 | write_exp_elt_opcode (&p->pstate, OP_REGISTER); |
| 1235 | str.ptr = regname; |
| 1236 | str.length = len; |
| 1237 | write_exp_string (&p->pstate, str); |
| 1238 | write_exp_elt_opcode (&p->pstate, OP_REGISTER); |
| 1239 | |
| 1240 | write_exp_elt_opcode (&p->pstate, BINOP_ADD); |
| 1241 | |
| 1242 | /* Casting to the expected type. */ |
| 1243 | write_exp_elt_opcode (&p->pstate, UNOP_CAST); |
| 1244 | write_exp_elt_type (&p->pstate, lookup_pointer_type (p->arg_type)); |
| 1245 | write_exp_elt_opcode (&p->pstate, UNOP_CAST); |
| 1246 | |
| 1247 | write_exp_elt_opcode (&p->pstate, UNOP_IND); |
| 1248 | |
| 1249 | p->arg = tmp; |
| 1250 | } |
| 1251 | else |
| 1252 | return 0; |
| 1253 | |
| 1254 | return 1; |
| 1255 | } |
| 1256 | |
| 1257 | /* ARM process record-replay constructs: syscall, signal etc. */ |
| 1258 | |
| 1259 | struct linux_record_tdep arm_linux_record_tdep; |
| 1260 | |
| 1261 | /* arm_canonicalize_syscall maps from the native arm Linux set |
| 1262 | of syscall ids into a canonical set of syscall ids used by |
| 1263 | process record. */ |
| 1264 | |
| 1265 | static enum gdb_syscall |
| 1266 | arm_canonicalize_syscall (int syscall) |
| 1267 | { |
| 1268 | switch (syscall) |
| 1269 | { |
| 1270 | case 0: return gdb_sys_restart_syscall; |
| 1271 | case 1: return gdb_sys_exit; |
| 1272 | case 2: return gdb_sys_fork; |
| 1273 | case 3: return gdb_sys_read; |
| 1274 | case 4: return gdb_sys_write; |
| 1275 | case 5: return gdb_sys_open; |
| 1276 | case 6: return gdb_sys_close; |
| 1277 | case 8: return gdb_sys_creat; |
| 1278 | case 9: return gdb_sys_link; |
| 1279 | case 10: return gdb_sys_unlink; |
| 1280 | case 11: return gdb_sys_execve; |
| 1281 | case 12: return gdb_sys_chdir; |
| 1282 | case 13: return gdb_sys_time; |
| 1283 | case 14: return gdb_sys_mknod; |
| 1284 | case 15: return gdb_sys_chmod; |
| 1285 | case 16: return gdb_sys_lchown16; |
| 1286 | case 19: return gdb_sys_lseek; |
| 1287 | case 20: return gdb_sys_getpid; |
| 1288 | case 21: return gdb_sys_mount; |
| 1289 | case 22: return gdb_sys_oldumount; |
| 1290 | case 23: return gdb_sys_setuid16; |
| 1291 | case 24: return gdb_sys_getuid16; |
| 1292 | case 25: return gdb_sys_stime; |
| 1293 | case 26: return gdb_sys_ptrace; |
| 1294 | case 27: return gdb_sys_alarm; |
| 1295 | case 29: return gdb_sys_pause; |
| 1296 | case 30: return gdb_sys_utime; |
| 1297 | case 33: return gdb_sys_access; |
| 1298 | case 34: return gdb_sys_nice; |
| 1299 | case 36: return gdb_sys_sync; |
| 1300 | case 37: return gdb_sys_kill; |
| 1301 | case 38: return gdb_sys_rename; |
| 1302 | case 39: return gdb_sys_mkdir; |
| 1303 | case 40: return gdb_sys_rmdir; |
| 1304 | case 41: return gdb_sys_dup; |
| 1305 | case 42: return gdb_sys_pipe; |
| 1306 | case 43: return gdb_sys_times; |
| 1307 | case 45: return gdb_sys_brk; |
| 1308 | case 46: return gdb_sys_setgid16; |
| 1309 | case 47: return gdb_sys_getgid16; |
| 1310 | case 49: return gdb_sys_geteuid16; |
| 1311 | case 50: return gdb_sys_getegid16; |
| 1312 | case 51: return gdb_sys_acct; |
| 1313 | case 52: return gdb_sys_umount; |
| 1314 | case 54: return gdb_sys_ioctl; |
| 1315 | case 55: return gdb_sys_fcntl; |
| 1316 | case 57: return gdb_sys_setpgid; |
| 1317 | case 60: return gdb_sys_umask; |
| 1318 | case 61: return gdb_sys_chroot; |
| 1319 | case 62: return gdb_sys_ustat; |
| 1320 | case 63: return gdb_sys_dup2; |
| 1321 | case 64: return gdb_sys_getppid; |
| 1322 | case 65: return gdb_sys_getpgrp; |
| 1323 | case 66: return gdb_sys_setsid; |
| 1324 | case 67: return gdb_sys_sigaction; |
| 1325 | case 70: return gdb_sys_setreuid16; |
| 1326 | case 71: return gdb_sys_setregid16; |
| 1327 | case 72: return gdb_sys_sigsuspend; |
| 1328 | case 73: return gdb_sys_sigpending; |
| 1329 | case 74: return gdb_sys_sethostname; |
| 1330 | case 75: return gdb_sys_setrlimit; |
| 1331 | case 76: return gdb_sys_getrlimit; |
| 1332 | case 77: return gdb_sys_getrusage; |
| 1333 | case 78: return gdb_sys_gettimeofday; |
| 1334 | case 79: return gdb_sys_settimeofday; |
| 1335 | case 80: return gdb_sys_getgroups16; |
| 1336 | case 81: return gdb_sys_setgroups16; |
| 1337 | case 82: return gdb_sys_select; |
| 1338 | case 83: return gdb_sys_symlink; |
| 1339 | case 85: return gdb_sys_readlink; |
| 1340 | case 86: return gdb_sys_uselib; |
| 1341 | case 87: return gdb_sys_swapon; |
| 1342 | case 88: return gdb_sys_reboot; |
| 1343 | case 89: return gdb_old_readdir; |
| 1344 | case 90: return gdb_old_mmap; |
| 1345 | case 91: return gdb_sys_munmap; |
| 1346 | case 92: return gdb_sys_truncate; |
| 1347 | case 93: return gdb_sys_ftruncate; |
| 1348 | case 94: return gdb_sys_fchmod; |
| 1349 | case 95: return gdb_sys_fchown16; |
| 1350 | case 96: return gdb_sys_getpriority; |
| 1351 | case 97: return gdb_sys_setpriority; |
| 1352 | case 99: return gdb_sys_statfs; |
| 1353 | case 100: return gdb_sys_fstatfs; |
| 1354 | case 102: return gdb_sys_socketcall; |
| 1355 | case 103: return gdb_sys_syslog; |
| 1356 | case 104: return gdb_sys_setitimer; |
| 1357 | case 105: return gdb_sys_getitimer; |
| 1358 | case 106: return gdb_sys_stat; |
| 1359 | case 107: return gdb_sys_lstat; |
| 1360 | case 108: return gdb_sys_fstat; |
| 1361 | case 111: return gdb_sys_vhangup; |
| 1362 | case 113: /* sys_syscall */ |
| 1363 | return gdb_sys_no_syscall; |
| 1364 | case 114: return gdb_sys_wait4; |
| 1365 | case 115: return gdb_sys_swapoff; |
| 1366 | case 116: return gdb_sys_sysinfo; |
| 1367 | case 117: return gdb_sys_ipc; |
| 1368 | case 118: return gdb_sys_fsync; |
| 1369 | case 119: return gdb_sys_sigreturn; |
| 1370 | case 120: return gdb_sys_clone; |
| 1371 | case 121: return gdb_sys_setdomainname; |
| 1372 | case 122: return gdb_sys_uname; |
| 1373 | case 124: return gdb_sys_adjtimex; |
| 1374 | case 125: return gdb_sys_mprotect; |
| 1375 | case 126: return gdb_sys_sigprocmask; |
| 1376 | case 128: return gdb_sys_init_module; |
| 1377 | case 129: return gdb_sys_delete_module; |
| 1378 | case 131: return gdb_sys_quotactl; |
| 1379 | case 132: return gdb_sys_getpgid; |
| 1380 | case 133: return gdb_sys_fchdir; |
| 1381 | case 134: return gdb_sys_bdflush; |
| 1382 | case 135: return gdb_sys_sysfs; |
| 1383 | case 136: return gdb_sys_personality; |
| 1384 | case 138: return gdb_sys_setfsuid16; |
| 1385 | case 139: return gdb_sys_setfsgid16; |
| 1386 | case 140: return gdb_sys_llseek; |
| 1387 | case 141: return gdb_sys_getdents; |
| 1388 | case 142: return gdb_sys_select; |
| 1389 | case 143: return gdb_sys_flock; |
| 1390 | case 144: return gdb_sys_msync; |
| 1391 | case 145: return gdb_sys_readv; |
| 1392 | case 146: return gdb_sys_writev; |
| 1393 | case 147: return gdb_sys_getsid; |
| 1394 | case 148: return gdb_sys_fdatasync; |
| 1395 | case 149: return gdb_sys_sysctl; |
| 1396 | case 150: return gdb_sys_mlock; |
| 1397 | case 151: return gdb_sys_munlock; |
| 1398 | case 152: return gdb_sys_mlockall; |
| 1399 | case 153: return gdb_sys_munlockall; |
| 1400 | case 154: return gdb_sys_sched_setparam; |
| 1401 | case 155: return gdb_sys_sched_getparam; |
| 1402 | case 156: return gdb_sys_sched_setscheduler; |
| 1403 | case 157: return gdb_sys_sched_getscheduler; |
| 1404 | case 158: return gdb_sys_sched_yield; |
| 1405 | case 159: return gdb_sys_sched_get_priority_max; |
| 1406 | case 160: return gdb_sys_sched_get_priority_min; |
| 1407 | case 161: return gdb_sys_sched_rr_get_interval; |
| 1408 | case 162: return gdb_sys_nanosleep; |
| 1409 | case 163: return gdb_sys_mremap; |
| 1410 | case 164: return gdb_sys_setresuid16; |
| 1411 | case 165: return gdb_sys_getresuid16; |
| 1412 | case 168: return gdb_sys_poll; |
| 1413 | case 169: return gdb_sys_nfsservctl; |
| 1414 | case 170: return gdb_sys_setresgid; |
| 1415 | case 171: return gdb_sys_getresgid; |
| 1416 | case 172: return gdb_sys_prctl; |
| 1417 | case 173: return gdb_sys_rt_sigreturn; |
| 1418 | case 174: return gdb_sys_rt_sigaction; |
| 1419 | case 175: return gdb_sys_rt_sigprocmask; |
| 1420 | case 176: return gdb_sys_rt_sigpending; |
| 1421 | case 177: return gdb_sys_rt_sigtimedwait; |
| 1422 | case 178: return gdb_sys_rt_sigqueueinfo; |
| 1423 | case 179: return gdb_sys_rt_sigsuspend; |
| 1424 | case 180: return gdb_sys_pread64; |
| 1425 | case 181: return gdb_sys_pwrite64; |
| 1426 | case 182: return gdb_sys_chown; |
| 1427 | case 183: return gdb_sys_getcwd; |
| 1428 | case 184: return gdb_sys_capget; |
| 1429 | case 185: return gdb_sys_capset; |
| 1430 | case 186: return gdb_sys_sigaltstack; |
| 1431 | case 187: return gdb_sys_sendfile; |
| 1432 | case 190: return gdb_sys_vfork; |
| 1433 | case 191: return gdb_sys_getrlimit; |
| 1434 | case 192: return gdb_sys_mmap2; |
| 1435 | case 193: return gdb_sys_truncate64; |
| 1436 | case 194: return gdb_sys_ftruncate64; |
| 1437 | case 195: return gdb_sys_stat64; |
| 1438 | case 196: return gdb_sys_lstat64; |
| 1439 | case 197: return gdb_sys_fstat64; |
| 1440 | case 198: return gdb_sys_lchown; |
| 1441 | case 199: return gdb_sys_getuid; |
| 1442 | case 200: return gdb_sys_getgid; |
| 1443 | case 201: return gdb_sys_geteuid; |
| 1444 | case 202: return gdb_sys_getegid; |
| 1445 | case 203: return gdb_sys_setreuid; |
| 1446 | case 204: return gdb_sys_setregid; |
| 1447 | case 205: return gdb_sys_getgroups; |
| 1448 | case 206: return gdb_sys_setgroups; |
| 1449 | case 207: return gdb_sys_fchown; |
| 1450 | case 208: return gdb_sys_setresuid; |
| 1451 | case 209: return gdb_sys_getresuid; |
| 1452 | case 210: return gdb_sys_setresgid; |
| 1453 | case 211: return gdb_sys_getresgid; |
| 1454 | case 212: return gdb_sys_chown; |
| 1455 | case 213: return gdb_sys_setuid; |
| 1456 | case 214: return gdb_sys_setgid; |
| 1457 | case 215: return gdb_sys_setfsuid; |
| 1458 | case 216: return gdb_sys_setfsgid; |
| 1459 | case 217: return gdb_sys_getdents64; |
| 1460 | case 218: return gdb_sys_pivot_root; |
| 1461 | case 219: return gdb_sys_mincore; |
| 1462 | case 220: return gdb_sys_madvise; |
| 1463 | case 221: return gdb_sys_fcntl64; |
| 1464 | case 224: return gdb_sys_gettid; |
| 1465 | case 225: return gdb_sys_readahead; |
| 1466 | case 226: return gdb_sys_setxattr; |
| 1467 | case 227: return gdb_sys_lsetxattr; |
| 1468 | case 228: return gdb_sys_fsetxattr; |
| 1469 | case 229: return gdb_sys_getxattr; |
| 1470 | case 230: return gdb_sys_lgetxattr; |
| 1471 | case 231: return gdb_sys_fgetxattr; |
| 1472 | case 232: return gdb_sys_listxattr; |
| 1473 | case 233: return gdb_sys_llistxattr; |
| 1474 | case 234: return gdb_sys_flistxattr; |
| 1475 | case 235: return gdb_sys_removexattr; |
| 1476 | case 236: return gdb_sys_lremovexattr; |
| 1477 | case 237: return gdb_sys_fremovexattr; |
| 1478 | case 238: return gdb_sys_tkill; |
| 1479 | case 239: return gdb_sys_sendfile64; |
| 1480 | case 240: return gdb_sys_futex; |
| 1481 | case 241: return gdb_sys_sched_setaffinity; |
| 1482 | case 242: return gdb_sys_sched_getaffinity; |
| 1483 | case 243: return gdb_sys_io_setup; |
| 1484 | case 244: return gdb_sys_io_destroy; |
| 1485 | case 245: return gdb_sys_io_getevents; |
| 1486 | case 246: return gdb_sys_io_submit; |
| 1487 | case 247: return gdb_sys_io_cancel; |
| 1488 | case 248: return gdb_sys_exit_group; |
| 1489 | case 249: return gdb_sys_lookup_dcookie; |
| 1490 | case 250: return gdb_sys_epoll_create; |
| 1491 | case 251: return gdb_sys_epoll_ctl; |
| 1492 | case 252: return gdb_sys_epoll_wait; |
| 1493 | case 253: return gdb_sys_remap_file_pages; |
| 1494 | case 256: return gdb_sys_set_tid_address; |
| 1495 | case 257: return gdb_sys_timer_create; |
| 1496 | case 258: return gdb_sys_timer_settime; |
| 1497 | case 259: return gdb_sys_timer_gettime; |
| 1498 | case 260: return gdb_sys_timer_getoverrun; |
| 1499 | case 261: return gdb_sys_timer_delete; |
| 1500 | case 262: return gdb_sys_clock_settime; |
| 1501 | case 263: return gdb_sys_clock_gettime; |
| 1502 | case 264: return gdb_sys_clock_getres; |
| 1503 | case 265: return gdb_sys_clock_nanosleep; |
| 1504 | case 266: return gdb_sys_statfs64; |
| 1505 | case 267: return gdb_sys_fstatfs64; |
| 1506 | case 268: return gdb_sys_tgkill; |
| 1507 | case 269: return gdb_sys_utimes; |
| 1508 | /* |
| 1509 | case 270: return gdb_sys_arm_fadvise64_64; |
| 1510 | case 271: return gdb_sys_pciconfig_iobase; |
| 1511 | case 272: return gdb_sys_pciconfig_read; |
| 1512 | case 273: return gdb_sys_pciconfig_write; |
| 1513 | */ |
| 1514 | case 274: return gdb_sys_mq_open; |
| 1515 | case 275: return gdb_sys_mq_unlink; |
| 1516 | case 276: return gdb_sys_mq_timedsend; |
| 1517 | case 277: return gdb_sys_mq_timedreceive; |
| 1518 | case 278: return gdb_sys_mq_notify; |
| 1519 | case 279: return gdb_sys_mq_getsetattr; |
| 1520 | case 280: return gdb_sys_waitid; |
| 1521 | case 281: return gdb_sys_socket; |
| 1522 | case 282: return gdb_sys_bind; |
| 1523 | case 283: return gdb_sys_connect; |
| 1524 | case 284: return gdb_sys_listen; |
| 1525 | case 285: return gdb_sys_accept; |
| 1526 | case 286: return gdb_sys_getsockname; |
| 1527 | case 287: return gdb_sys_getpeername; |
| 1528 | case 288: return gdb_sys_socketpair; |
| 1529 | case 289: /* send */ return gdb_sys_no_syscall; |
| 1530 | case 290: return gdb_sys_sendto; |
| 1531 | case 291: return gdb_sys_recv; |
| 1532 | case 292: return gdb_sys_recvfrom; |
| 1533 | case 293: return gdb_sys_shutdown; |
| 1534 | case 294: return gdb_sys_setsockopt; |
| 1535 | case 295: return gdb_sys_getsockopt; |
| 1536 | case 296: return gdb_sys_sendmsg; |
| 1537 | case 297: return gdb_sys_recvmsg; |
| 1538 | case 298: return gdb_sys_semop; |
| 1539 | case 299: return gdb_sys_semget; |
| 1540 | case 300: return gdb_sys_semctl; |
| 1541 | case 301: return gdb_sys_msgsnd; |
| 1542 | case 302: return gdb_sys_msgrcv; |
| 1543 | case 303: return gdb_sys_msgget; |
| 1544 | case 304: return gdb_sys_msgctl; |
| 1545 | case 305: return gdb_sys_shmat; |
| 1546 | case 306: return gdb_sys_shmdt; |
| 1547 | case 307: return gdb_sys_shmget; |
| 1548 | case 308: return gdb_sys_shmctl; |
| 1549 | case 309: return gdb_sys_add_key; |
| 1550 | case 310: return gdb_sys_request_key; |
| 1551 | case 311: return gdb_sys_keyctl; |
| 1552 | case 312: return gdb_sys_semtimedop; |
| 1553 | case 313: /* vserver */ return gdb_sys_no_syscall; |
| 1554 | case 314: return gdb_sys_ioprio_set; |
| 1555 | case 315: return gdb_sys_ioprio_get; |
| 1556 | case 316: return gdb_sys_inotify_init; |
| 1557 | case 317: return gdb_sys_inotify_add_watch; |
| 1558 | case 318: return gdb_sys_inotify_rm_watch; |
| 1559 | case 319: return gdb_sys_mbind; |
| 1560 | case 320: return gdb_sys_get_mempolicy; |
| 1561 | case 321: return gdb_sys_set_mempolicy; |
| 1562 | case 322: return gdb_sys_openat; |
| 1563 | case 323: return gdb_sys_mkdirat; |
| 1564 | case 324: return gdb_sys_mknodat; |
| 1565 | case 325: return gdb_sys_fchownat; |
| 1566 | case 326: return gdb_sys_futimesat; |
| 1567 | case 327: return gdb_sys_fstatat64; |
| 1568 | case 328: return gdb_sys_unlinkat; |
| 1569 | case 329: return gdb_sys_renameat; |
| 1570 | case 330: return gdb_sys_linkat; |
| 1571 | case 331: return gdb_sys_symlinkat; |
| 1572 | case 332: return gdb_sys_readlinkat; |
| 1573 | case 333: return gdb_sys_fchmodat; |
| 1574 | case 334: return gdb_sys_faccessat; |
| 1575 | case 335: return gdb_sys_pselect6; |
| 1576 | case 336: return gdb_sys_ppoll; |
| 1577 | case 337: return gdb_sys_unshare; |
| 1578 | case 338: return gdb_sys_set_robust_list; |
| 1579 | case 339: return gdb_sys_get_robust_list; |
| 1580 | case 340: return gdb_sys_splice; |
| 1581 | /*case 341: return gdb_sys_arm_sync_file_range;*/ |
| 1582 | case 342: return gdb_sys_tee; |
| 1583 | case 343: return gdb_sys_vmsplice; |
| 1584 | case 344: return gdb_sys_move_pages; |
| 1585 | case 345: return gdb_sys_getcpu; |
| 1586 | case 346: return gdb_sys_epoll_pwait; |
| 1587 | case 347: return gdb_sys_kexec_load; |
| 1588 | /* |
| 1589 | case 348: return gdb_sys_utimensat; |
| 1590 | case 349: return gdb_sys_signalfd; |
| 1591 | case 350: return gdb_sys_timerfd_create; |
| 1592 | case 351: return gdb_sys_eventfd; |
| 1593 | */ |
| 1594 | case 352: return gdb_sys_fallocate; |
| 1595 | /* |
| 1596 | case 353: return gdb_sys_timerfd_settime; |
| 1597 | case 354: return gdb_sys_timerfd_gettime; |
| 1598 | case 355: return gdb_sys_signalfd4; |
| 1599 | */ |
| 1600 | case 356: return gdb_sys_eventfd2; |
| 1601 | case 357: return gdb_sys_epoll_create1; |
| 1602 | case 358: return gdb_sys_dup3; |
| 1603 | case 359: return gdb_sys_pipe2; |
| 1604 | case 360: return gdb_sys_inotify_init1; |
| 1605 | /* |
| 1606 | case 361: return gdb_sys_preadv; |
| 1607 | case 362: return gdb_sys_pwritev; |
| 1608 | case 363: return gdb_sys_rt_tgsigqueueinfo; |
| 1609 | case 364: return gdb_sys_perf_event_open; |
| 1610 | case 365: return gdb_sys_recvmmsg; |
| 1611 | case 366: return gdb_sys_accept4; |
| 1612 | case 367: return gdb_sys_fanotify_init; |
| 1613 | case 368: return gdb_sys_fanotify_mark; |
| 1614 | case 369: return gdb_sys_prlimit64; |
| 1615 | case 370: return gdb_sys_name_to_handle_at; |
| 1616 | case 371: return gdb_sys_open_by_handle_at; |
| 1617 | case 372: return gdb_sys_clock_adjtime; |
| 1618 | case 373: return gdb_sys_syncfs; |
| 1619 | case 374: return gdb_sys_sendmmsg; |
| 1620 | case 375: return gdb_sys_setns; |
| 1621 | case 376: return gdb_sys_process_vm_readv; |
| 1622 | case 377: return gdb_sys_process_vm_writev; |
| 1623 | case 378: return gdb_sys_kcmp; |
| 1624 | case 379: return gdb_sys_finit_module; |
| 1625 | */ |
| 1626 | case 983041: /* ARM_breakpoint */ return gdb_sys_no_syscall; |
| 1627 | case 983042: /* ARM_cacheflush */ return gdb_sys_no_syscall; |
| 1628 | case 983043: /* ARM_usr26 */ return gdb_sys_no_syscall; |
| 1629 | case 983044: /* ARM_usr32 */ return gdb_sys_no_syscall; |
| 1630 | case 983045: /* ARM_set_tls */ return gdb_sys_no_syscall; |
| 1631 | default: return gdb_sys_no_syscall; |
| 1632 | } |
| 1633 | } |
| 1634 | |
| 1635 | /* Record all registers but PC register for process-record. */ |
| 1636 | |
| 1637 | static int |
| 1638 | arm_all_but_pc_registers_record (struct regcache *regcache) |
| 1639 | { |
| 1640 | int i; |
| 1641 | |
| 1642 | for (i = 0; i < ARM_PC_REGNUM; i++) |
| 1643 | { |
| 1644 | if (record_full_arch_list_add_reg (regcache, ARM_A1_REGNUM + i)) |
| 1645 | return -1; |
| 1646 | } |
| 1647 | |
| 1648 | if (record_full_arch_list_add_reg (regcache, ARM_PS_REGNUM)) |
| 1649 | return -1; |
| 1650 | |
| 1651 | return 0; |
| 1652 | } |
| 1653 | |
| 1654 | /* Handler for arm system call instruction recording. */ |
| 1655 | |
| 1656 | static int |
| 1657 | arm_linux_syscall_record (struct regcache *regcache, unsigned long svc_number) |
| 1658 | { |
| 1659 | int ret = 0; |
| 1660 | enum gdb_syscall syscall_gdb; |
| 1661 | |
| 1662 | syscall_gdb = arm_canonicalize_syscall (svc_number); |
| 1663 | |
| 1664 | if (syscall_gdb == gdb_sys_no_syscall) |
| 1665 | { |
| 1666 | printf_unfiltered (_("Process record and replay target doesn't " |
| 1667 | "support syscall number %s\n"), |
| 1668 | plongest (svc_number)); |
| 1669 | return -1; |
| 1670 | } |
| 1671 | |
| 1672 | if (syscall_gdb == gdb_sys_sigreturn |
| 1673 | || syscall_gdb == gdb_sys_rt_sigreturn) |
| 1674 | { |
| 1675 | if (arm_all_but_pc_registers_record (regcache)) |
| 1676 | return -1; |
| 1677 | return 0; |
| 1678 | } |
| 1679 | |
| 1680 | ret = record_linux_system_call (syscall_gdb, regcache, |
| 1681 | &arm_linux_record_tdep); |
| 1682 | if (ret != 0) |
| 1683 | return ret; |
| 1684 | |
| 1685 | /* Record the return value of the system call. */ |
| 1686 | if (record_full_arch_list_add_reg (regcache, ARM_A1_REGNUM)) |
| 1687 | return -1; |
| 1688 | /* Record LR. */ |
| 1689 | if (record_full_arch_list_add_reg (regcache, ARM_LR_REGNUM)) |
| 1690 | return -1; |
| 1691 | /* Record CPSR. */ |
| 1692 | if (record_full_arch_list_add_reg (regcache, ARM_PS_REGNUM)) |
| 1693 | return -1; |
| 1694 | |
| 1695 | return 0; |
| 1696 | } |
| 1697 | |
| 1698 | /* Implement the skip_trampoline_code gdbarch method. */ |
| 1699 | |
| 1700 | static CORE_ADDR |
| 1701 | arm_linux_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
| 1702 | { |
| 1703 | CORE_ADDR target_pc = arm_skip_stub (frame, pc); |
| 1704 | |
| 1705 | if (target_pc != 0) |
| 1706 | return target_pc; |
| 1707 | |
| 1708 | return find_solib_trampoline_target (frame, pc); |
| 1709 | } |
| 1710 | |
| 1711 | /* Implement the gcc_target_options gdbarch method. */ |
| 1712 | |
| 1713 | static std::string |
| 1714 | arm_linux_gcc_target_options (struct gdbarch *gdbarch) |
| 1715 | { |
| 1716 | /* GCC doesn't know "-m32". */ |
| 1717 | return {}; |
| 1718 | } |
| 1719 | |
| 1720 | static void |
| 1721 | arm_linux_init_abi (struct gdbarch_info info, |
| 1722 | struct gdbarch *gdbarch) |
| 1723 | { |
| 1724 | static const char *const stap_integer_prefixes[] = { "#", "$", "", NULL }; |
| 1725 | static const char *const stap_register_prefixes[] = { "r", NULL }; |
| 1726 | static const char *const stap_register_indirection_prefixes[] = { "[", |
| 1727 | NULL }; |
| 1728 | static const char *const stap_register_indirection_suffixes[] = { "]", |
| 1729 | NULL }; |
| 1730 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1731 | |
| 1732 | linux_init_abi (info, gdbarch); |
| 1733 | |
| 1734 | tdep->lowest_pc = 0x8000; |
| 1735 | if (info.byte_order_for_code == BFD_ENDIAN_BIG) |
| 1736 | { |
| 1737 | if (tdep->arm_abi == ARM_ABI_AAPCS) |
| 1738 | tdep->arm_breakpoint = eabi_linux_arm_be_breakpoint; |
| 1739 | else |
| 1740 | tdep->arm_breakpoint = arm_linux_arm_be_breakpoint; |
| 1741 | tdep->thumb_breakpoint = arm_linux_thumb_be_breakpoint; |
| 1742 | tdep->thumb2_breakpoint = arm_linux_thumb2_be_breakpoint; |
| 1743 | } |
| 1744 | else |
| 1745 | { |
| 1746 | if (tdep->arm_abi == ARM_ABI_AAPCS) |
| 1747 | tdep->arm_breakpoint = eabi_linux_arm_le_breakpoint; |
| 1748 | else |
| 1749 | tdep->arm_breakpoint = arm_linux_arm_le_breakpoint; |
| 1750 | tdep->thumb_breakpoint = arm_linux_thumb_le_breakpoint; |
| 1751 | tdep->thumb2_breakpoint = arm_linux_thumb2_le_breakpoint; |
| 1752 | } |
| 1753 | tdep->arm_breakpoint_size = sizeof (arm_linux_arm_le_breakpoint); |
| 1754 | tdep->thumb_breakpoint_size = sizeof (arm_linux_thumb_le_breakpoint); |
| 1755 | tdep->thumb2_breakpoint_size = sizeof (arm_linux_thumb2_le_breakpoint); |
| 1756 | |
| 1757 | if (tdep->fp_model == ARM_FLOAT_AUTO) |
| 1758 | tdep->fp_model = ARM_FLOAT_FPA; |
| 1759 | |
| 1760 | switch (tdep->fp_model) |
| 1761 | { |
| 1762 | case ARM_FLOAT_FPA: |
| 1763 | tdep->jb_pc = ARM_LINUX_JB_PC_FPA; |
| 1764 | break; |
| 1765 | case ARM_FLOAT_SOFT_FPA: |
| 1766 | case ARM_FLOAT_SOFT_VFP: |
| 1767 | case ARM_FLOAT_VFP: |
| 1768 | tdep->jb_pc = ARM_LINUX_JB_PC_EABI; |
| 1769 | break; |
| 1770 | default: |
| 1771 | internal_error |
| 1772 | (__FILE__, __LINE__, |
| 1773 | _("arm_linux_init_abi: Floating point model not supported")); |
| 1774 | break; |
| 1775 | } |
| 1776 | tdep->jb_elt_size = ARM_LINUX_JB_ELEMENT_SIZE; |
| 1777 | |
| 1778 | set_solib_svr4_fetch_link_map_offsets |
| 1779 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); |
| 1780 | |
| 1781 | /* Single stepping. */ |
| 1782 | set_gdbarch_software_single_step (gdbarch, arm_linux_software_single_step); |
| 1783 | |
| 1784 | /* Shared library handling. */ |
| 1785 | set_gdbarch_skip_trampoline_code (gdbarch, arm_linux_skip_trampoline_code); |
| 1786 | set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); |
| 1787 | |
| 1788 | /* Enable TLS support. */ |
| 1789 | set_gdbarch_fetch_tls_load_module_address (gdbarch, |
| 1790 | svr4_fetch_objfile_link_map); |
| 1791 | |
| 1792 | tramp_frame_prepend_unwinder (gdbarch, |
| 1793 | &arm_linux_sigreturn_tramp_frame); |
| 1794 | tramp_frame_prepend_unwinder (gdbarch, |
| 1795 | &arm_linux_rt_sigreturn_tramp_frame); |
| 1796 | tramp_frame_prepend_unwinder (gdbarch, |
| 1797 | &arm_eabi_linux_sigreturn_tramp_frame); |
| 1798 | tramp_frame_prepend_unwinder (gdbarch, |
| 1799 | &arm_eabi_linux_rt_sigreturn_tramp_frame); |
| 1800 | tramp_frame_prepend_unwinder (gdbarch, |
| 1801 | &thumb2_eabi_linux_sigreturn_tramp_frame); |
| 1802 | tramp_frame_prepend_unwinder (gdbarch, |
| 1803 | &thumb2_eabi_linux_rt_sigreturn_tramp_frame); |
| 1804 | tramp_frame_prepend_unwinder (gdbarch, |
| 1805 | &arm_linux_restart_syscall_tramp_frame); |
| 1806 | tramp_frame_prepend_unwinder (gdbarch, |
| 1807 | &arm_kernel_linux_restart_syscall_tramp_frame); |
| 1808 | |
| 1809 | /* Core file support. */ |
| 1810 | set_gdbarch_iterate_over_regset_sections |
| 1811 | (gdbarch, arm_linux_iterate_over_regset_sections); |
| 1812 | set_gdbarch_core_read_description (gdbarch, arm_linux_core_read_description); |
| 1813 | |
| 1814 | /* Displaced stepping. */ |
| 1815 | set_gdbarch_displaced_step_copy_insn (gdbarch, |
| 1816 | arm_linux_displaced_step_copy_insn); |
| 1817 | set_gdbarch_displaced_step_fixup (gdbarch, arm_displaced_step_fixup); |
| 1818 | set_gdbarch_displaced_step_location (gdbarch, linux_displaced_step_location); |
| 1819 | |
| 1820 | /* Reversible debugging, process record. */ |
| 1821 | set_gdbarch_process_record (gdbarch, arm_process_record); |
| 1822 | |
| 1823 | /* SystemTap functions. */ |
| 1824 | set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes); |
| 1825 | set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes); |
| 1826 | set_gdbarch_stap_register_indirection_prefixes (gdbarch, |
| 1827 | stap_register_indirection_prefixes); |
| 1828 | set_gdbarch_stap_register_indirection_suffixes (gdbarch, |
| 1829 | stap_register_indirection_suffixes); |
| 1830 | set_gdbarch_stap_gdb_register_prefix (gdbarch, "r"); |
| 1831 | set_gdbarch_stap_is_single_operand (gdbarch, arm_stap_is_single_operand); |
| 1832 | set_gdbarch_stap_parse_special_token (gdbarch, |
| 1833 | arm_stap_parse_special_token); |
| 1834 | |
| 1835 | /* `catch syscall' */ |
| 1836 | set_xml_syscall_file_name (gdbarch, "syscalls/arm-linux.xml"); |
| 1837 | set_gdbarch_get_syscall_number (gdbarch, arm_linux_get_syscall_number); |
| 1838 | |
| 1839 | /* Syscall record. */ |
| 1840 | tdep->arm_syscall_record = arm_linux_syscall_record; |
| 1841 | |
| 1842 | /* Initialize the arm_linux_record_tdep. */ |
| 1843 | /* These values are the size of the type that will be used in a system |
| 1844 | call. They are obtained from Linux Kernel source. */ |
| 1845 | arm_linux_record_tdep.size_pointer |
| 1846 | = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT; |
| 1847 | arm_linux_record_tdep.size__old_kernel_stat = 32; |
| 1848 | arm_linux_record_tdep.size_tms = 16; |
| 1849 | arm_linux_record_tdep.size_loff_t = 8; |
| 1850 | arm_linux_record_tdep.size_flock = 16; |
| 1851 | arm_linux_record_tdep.size_oldold_utsname = 45; |
| 1852 | arm_linux_record_tdep.size_ustat = 20; |
| 1853 | arm_linux_record_tdep.size_old_sigaction = 16; |
| 1854 | arm_linux_record_tdep.size_old_sigset_t = 4; |
| 1855 | arm_linux_record_tdep.size_rlimit = 8; |
| 1856 | arm_linux_record_tdep.size_rusage = 72; |
| 1857 | arm_linux_record_tdep.size_timeval = 8; |
| 1858 | arm_linux_record_tdep.size_timezone = 8; |
| 1859 | arm_linux_record_tdep.size_old_gid_t = 2; |
| 1860 | arm_linux_record_tdep.size_old_uid_t = 2; |
| 1861 | arm_linux_record_tdep.size_fd_set = 128; |
| 1862 | arm_linux_record_tdep.size_old_dirent = 268; |
| 1863 | arm_linux_record_tdep.size_statfs = 64; |
| 1864 | arm_linux_record_tdep.size_statfs64 = 84; |
| 1865 | arm_linux_record_tdep.size_sockaddr = 16; |
| 1866 | arm_linux_record_tdep.size_int |
| 1867 | = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT; |
| 1868 | arm_linux_record_tdep.size_long |
| 1869 | = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; |
| 1870 | arm_linux_record_tdep.size_ulong |
| 1871 | = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; |
| 1872 | arm_linux_record_tdep.size_msghdr = 28; |
| 1873 | arm_linux_record_tdep.size_itimerval = 16; |
| 1874 | arm_linux_record_tdep.size_stat = 88; |
| 1875 | arm_linux_record_tdep.size_old_utsname = 325; |
| 1876 | arm_linux_record_tdep.size_sysinfo = 64; |
| 1877 | arm_linux_record_tdep.size_msqid_ds = 88; |
| 1878 | arm_linux_record_tdep.size_shmid_ds = 84; |
| 1879 | arm_linux_record_tdep.size_new_utsname = 390; |
| 1880 | arm_linux_record_tdep.size_timex = 128; |
| 1881 | arm_linux_record_tdep.size_mem_dqinfo = 24; |
| 1882 | arm_linux_record_tdep.size_if_dqblk = 68; |
| 1883 | arm_linux_record_tdep.size_fs_quota_stat = 68; |
| 1884 | arm_linux_record_tdep.size_timespec = 8; |
| 1885 | arm_linux_record_tdep.size_pollfd = 8; |
| 1886 | arm_linux_record_tdep.size_NFS_FHSIZE = 32; |
| 1887 | arm_linux_record_tdep.size_knfsd_fh = 132; |
| 1888 | arm_linux_record_tdep.size_TASK_COMM_LEN = 16; |
| 1889 | arm_linux_record_tdep.size_sigaction = 20; |
| 1890 | arm_linux_record_tdep.size_sigset_t = 8; |
| 1891 | arm_linux_record_tdep.size_siginfo_t = 128; |
| 1892 | arm_linux_record_tdep.size_cap_user_data_t = 12; |
| 1893 | arm_linux_record_tdep.size_stack_t = 12; |
| 1894 | arm_linux_record_tdep.size_off_t = arm_linux_record_tdep.size_long; |
| 1895 | arm_linux_record_tdep.size_stat64 = 96; |
| 1896 | arm_linux_record_tdep.size_gid_t = 4; |
| 1897 | arm_linux_record_tdep.size_uid_t = 4; |
| 1898 | arm_linux_record_tdep.size_PAGE_SIZE = 4096; |
| 1899 | arm_linux_record_tdep.size_flock64 = 24; |
| 1900 | arm_linux_record_tdep.size_user_desc = 16; |
| 1901 | arm_linux_record_tdep.size_io_event = 32; |
| 1902 | arm_linux_record_tdep.size_iocb = 64; |
| 1903 | arm_linux_record_tdep.size_epoll_event = 12; |
| 1904 | arm_linux_record_tdep.size_itimerspec |
| 1905 | = arm_linux_record_tdep.size_timespec * 2; |
| 1906 | arm_linux_record_tdep.size_mq_attr = 32; |
| 1907 | arm_linux_record_tdep.size_termios = 36; |
| 1908 | arm_linux_record_tdep.size_termios2 = 44; |
| 1909 | arm_linux_record_tdep.size_pid_t = 4; |
| 1910 | arm_linux_record_tdep.size_winsize = 8; |
| 1911 | arm_linux_record_tdep.size_serial_struct = 60; |
| 1912 | arm_linux_record_tdep.size_serial_icounter_struct = 80; |
| 1913 | arm_linux_record_tdep.size_hayes_esp_config = 12; |
| 1914 | arm_linux_record_tdep.size_size_t = 4; |
| 1915 | arm_linux_record_tdep.size_iovec = 8; |
| 1916 | arm_linux_record_tdep.size_time_t = 4; |
| 1917 | |
| 1918 | /* These values are the second argument of system call "sys_ioctl". |
| 1919 | They are obtained from Linux Kernel source. */ |
| 1920 | arm_linux_record_tdep.ioctl_TCGETS = 0x5401; |
| 1921 | arm_linux_record_tdep.ioctl_TCSETS = 0x5402; |
| 1922 | arm_linux_record_tdep.ioctl_TCSETSW = 0x5403; |
| 1923 | arm_linux_record_tdep.ioctl_TCSETSF = 0x5404; |
| 1924 | arm_linux_record_tdep.ioctl_TCGETA = 0x5405; |
| 1925 | arm_linux_record_tdep.ioctl_TCSETA = 0x5406; |
| 1926 | arm_linux_record_tdep.ioctl_TCSETAW = 0x5407; |
| 1927 | arm_linux_record_tdep.ioctl_TCSETAF = 0x5408; |
| 1928 | arm_linux_record_tdep.ioctl_TCSBRK = 0x5409; |
| 1929 | arm_linux_record_tdep.ioctl_TCXONC = 0x540a; |
| 1930 | arm_linux_record_tdep.ioctl_TCFLSH = 0x540b; |
| 1931 | arm_linux_record_tdep.ioctl_TIOCEXCL = 0x540c; |
| 1932 | arm_linux_record_tdep.ioctl_TIOCNXCL = 0x540d; |
| 1933 | arm_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e; |
| 1934 | arm_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f; |
| 1935 | arm_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410; |
| 1936 | arm_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411; |
| 1937 | arm_linux_record_tdep.ioctl_TIOCSTI = 0x5412; |
| 1938 | arm_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413; |
| 1939 | arm_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414; |
| 1940 | arm_linux_record_tdep.ioctl_TIOCMGET = 0x5415; |
| 1941 | arm_linux_record_tdep.ioctl_TIOCMBIS = 0x5416; |
| 1942 | arm_linux_record_tdep.ioctl_TIOCMBIC = 0x5417; |
| 1943 | arm_linux_record_tdep.ioctl_TIOCMSET = 0x5418; |
| 1944 | arm_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419; |
| 1945 | arm_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a; |
| 1946 | arm_linux_record_tdep.ioctl_FIONREAD = 0x541b; |
| 1947 | arm_linux_record_tdep.ioctl_TIOCINQ = arm_linux_record_tdep.ioctl_FIONREAD; |
| 1948 | arm_linux_record_tdep.ioctl_TIOCLINUX = 0x541c; |
| 1949 | arm_linux_record_tdep.ioctl_TIOCCONS = 0x541d; |
| 1950 | arm_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e; |
| 1951 | arm_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f; |
| 1952 | arm_linux_record_tdep.ioctl_TIOCPKT = 0x5420; |
| 1953 | arm_linux_record_tdep.ioctl_FIONBIO = 0x5421; |
| 1954 | arm_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422; |
| 1955 | arm_linux_record_tdep.ioctl_TIOCSETD = 0x5423; |
| 1956 | arm_linux_record_tdep.ioctl_TIOCGETD = 0x5424; |
| 1957 | arm_linux_record_tdep.ioctl_TCSBRKP = 0x5425; |
| 1958 | arm_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426; |
| 1959 | arm_linux_record_tdep.ioctl_TIOCSBRK = 0x5427; |
| 1960 | arm_linux_record_tdep.ioctl_TIOCCBRK = 0x5428; |
| 1961 | arm_linux_record_tdep.ioctl_TIOCGSID = 0x5429; |
| 1962 | arm_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a; |
| 1963 | arm_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b; |
| 1964 | arm_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c; |
| 1965 | arm_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d; |
| 1966 | arm_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430; |
| 1967 | arm_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431; |
| 1968 | arm_linux_record_tdep.ioctl_FIONCLEX = 0x5450; |
| 1969 | arm_linux_record_tdep.ioctl_FIOCLEX = 0x5451; |
| 1970 | arm_linux_record_tdep.ioctl_FIOASYNC = 0x5452; |
| 1971 | arm_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453; |
| 1972 | arm_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454; |
| 1973 | arm_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455; |
| 1974 | arm_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456; |
| 1975 | arm_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457; |
| 1976 | arm_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458; |
| 1977 | arm_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459; |
| 1978 | arm_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a; |
| 1979 | arm_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b; |
| 1980 | arm_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c; |
| 1981 | arm_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d; |
| 1982 | arm_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e; |
| 1983 | arm_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f; |
| 1984 | arm_linux_record_tdep.ioctl_FIOQSIZE = 0x5460; |
| 1985 | |
| 1986 | /* These values are the second argument of system call "sys_fcntl" |
| 1987 | and "sys_fcntl64". They are obtained from Linux Kernel source. */ |
| 1988 | arm_linux_record_tdep.fcntl_F_GETLK = 5; |
| 1989 | arm_linux_record_tdep.fcntl_F_GETLK64 = 12; |
| 1990 | arm_linux_record_tdep.fcntl_F_SETLK64 = 13; |
| 1991 | arm_linux_record_tdep.fcntl_F_SETLKW64 = 14; |
| 1992 | |
| 1993 | arm_linux_record_tdep.arg1 = ARM_A1_REGNUM; |
| 1994 | arm_linux_record_tdep.arg2 = ARM_A1_REGNUM + 1; |
| 1995 | arm_linux_record_tdep.arg3 = ARM_A1_REGNUM + 2; |
| 1996 | arm_linux_record_tdep.arg4 = ARM_A1_REGNUM + 3; |
| 1997 | arm_linux_record_tdep.arg5 = ARM_A1_REGNUM + 4; |
| 1998 | arm_linux_record_tdep.arg6 = ARM_A1_REGNUM + 5; |
| 1999 | arm_linux_record_tdep.arg7 = ARM_A1_REGNUM + 6; |
| 2000 | |
| 2001 | set_gdbarch_gcc_target_options (gdbarch, arm_linux_gcc_target_options); |
| 2002 | } |
| 2003 | |
| 2004 | void |
| 2005 | _initialize_arm_linux_tdep (void) |
| 2006 | { |
| 2007 | gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_LINUX, |
| 2008 | arm_linux_init_abi); |
| 2009 | } |