Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 1 | //===------------------------- AddressSpace.hpp ---------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | // |
| 9 | // Abstracts accessing local vs remote address spaces. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef __ADDRESSSPACE_HPP__ |
| 14 | #define __ADDRESSSPACE_HPP__ |
| 15 | |
| 16 | #include <stdint.h> |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <string.h> |
| 20 | |
| 21 | #ifndef _LIBUNWIND_IS_BAREMETAL |
| 22 | #include <dlfcn.h> |
| 23 | #endif |
| 24 | |
| 25 | #ifdef __APPLE__ |
| 26 | #include <mach-o/getsect.h> |
| 27 | namespace libunwind { |
| 28 | bool checkKeyMgrRegisteredFDEs(uintptr_t targetAddr, void *&fde); |
| 29 | } |
| 30 | #endif |
| 31 | |
| 32 | #include "libunwind.h" |
| 33 | #include "config.h" |
| 34 | #include "dwarf2.h" |
| 35 | #include "Registers.hpp" |
| 36 | |
Logan Chien | 6127858 | 2015-07-19 15:23:10 +0000 | [diff] [blame] | 37 | #if _LIBUNWIND_ARM_EHABI |
Ed Maste | 4289761 | 2016-09-28 15:37:21 +0000 | [diff] [blame] | 38 | #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) |
Ed Maste | 4831fd9 | 2015-10-16 19:40:09 +0000 | [diff] [blame] | 39 | |
| 40 | typedef void *_Unwind_Ptr; |
| 41 | |
| 42 | #elif defined(__linux__) |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 43 | |
| 44 | typedef long unsigned int *_Unwind_Ptr; |
| 45 | extern "C" _Unwind_Ptr __gnu_Unwind_Find_exidx(_Unwind_Ptr addr, int *len); |
| 46 | |
| 47 | // Emulate the BSD dl_unwind_find_exidx API when on a GNU libdl system. |
| 48 | #define dl_unwind_find_exidx __gnu_Unwind_Find_exidx |
| 49 | |
| 50 | #elif !defined(_LIBUNWIND_IS_BAREMETAL) |
| 51 | #include <link.h> |
| 52 | #else // !defined(_LIBUNWIND_IS_BAREMETAL) |
| 53 | // When statically linked on bare-metal, the symbols for the EH table are looked |
| 54 | // up without going through the dynamic loader. |
| 55 | struct EHTEntry { |
| 56 | uint32_t functionOffset; |
| 57 | uint32_t unwindOpcodes; |
| 58 | }; |
| 59 | extern EHTEntry __exidx_start; |
| 60 | extern EHTEntry __exidx_end; |
| 61 | #endif // !defined(_LIBUNWIND_IS_BAREMETAL) |
Logan Chien | 6127858 | 2015-07-19 15:23:10 +0000 | [diff] [blame] | 62 | #endif // _LIBUNWIND_ARM_EHABI |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 63 | |
Petr Hosek | a60a2d5 | 2016-10-23 21:48:47 +0000 | [diff] [blame^] | 64 | #if defined(__CloudABI__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \ |
| 65 | defined(__linux__) || defined(__NetBSD__) |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 66 | #if _LIBUNWIND_SUPPORT_DWARF_UNWIND && _LIBUNWIND_SUPPORT_DWARF_INDEX |
| 67 | #include <link.h> |
Ed Schouten | f67c635 | 2015-04-29 20:43:44 +0000 | [diff] [blame] | 68 | // Macro for machine-independent access to the ELF program headers. This |
| 69 | // macro is not available on some systems (e.g., FreeBSD). On these |
| 70 | // systems the data structures are just called Elf_XXX. Define ElfW() |
| 71 | // locally. |
| 72 | #if !defined(ElfW) |
| 73 | #define ElfW(type) Elf_##type |
| 74 | #endif |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 75 | #include "EHHeaderParser.hpp" |
| 76 | #endif |
| 77 | #endif |
| 78 | |
| 79 | namespace libunwind { |
| 80 | |
| 81 | /// Used by findUnwindSections() to return info about needed sections. |
| 82 | struct UnwindInfoSections { |
| 83 | #if _LIBUNWIND_SUPPORT_DWARF_UNWIND || _LIBUNWIND_SUPPORT_DWARF_INDEX || \ |
| 84 | _LIBUNWIND_SUPPORT_COMPACT_UNWIND |
| 85 | // No dso_base for ARM EHABI. |
| 86 | uintptr_t dso_base; |
| 87 | #endif |
| 88 | #if _LIBUNWIND_SUPPORT_DWARF_UNWIND |
| 89 | uintptr_t dwarf_section; |
| 90 | uintptr_t dwarf_section_length; |
| 91 | #endif |
| 92 | #if _LIBUNWIND_SUPPORT_DWARF_INDEX |
| 93 | uintptr_t dwarf_index_section; |
| 94 | uintptr_t dwarf_index_section_length; |
| 95 | #endif |
| 96 | #if _LIBUNWIND_SUPPORT_COMPACT_UNWIND |
| 97 | uintptr_t compact_unwind_section; |
| 98 | uintptr_t compact_unwind_section_length; |
| 99 | #endif |
Logan Chien | 6127858 | 2015-07-19 15:23:10 +0000 | [diff] [blame] | 100 | #if _LIBUNWIND_ARM_EHABI |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 101 | uintptr_t arm_section; |
| 102 | uintptr_t arm_section_length; |
| 103 | #endif |
| 104 | }; |
| 105 | |
| 106 | |
| 107 | /// LocalAddressSpace is used as a template parameter to UnwindCursor when |
| 108 | /// unwinding a thread in the same process. The wrappers compile away, |
| 109 | /// making local unwinds fast. |
| 110 | class __attribute__((visibility("hidden"))) LocalAddressSpace { |
| 111 | public: |
| 112 | #ifdef __LP64__ |
| 113 | typedef uint64_t pint_t; |
| 114 | typedef int64_t sint_t; |
| 115 | #else |
| 116 | typedef uint32_t pint_t; |
| 117 | typedef int32_t sint_t; |
| 118 | #endif |
| 119 | uint8_t get8(pint_t addr) { |
| 120 | uint8_t val; |
| 121 | memcpy(&val, (void *)addr, sizeof(val)); |
| 122 | return val; |
| 123 | } |
| 124 | uint16_t get16(pint_t addr) { |
| 125 | uint16_t val; |
| 126 | memcpy(&val, (void *)addr, sizeof(val)); |
| 127 | return val; |
| 128 | } |
| 129 | uint32_t get32(pint_t addr) { |
| 130 | uint32_t val; |
| 131 | memcpy(&val, (void *)addr, sizeof(val)); |
| 132 | return val; |
| 133 | } |
| 134 | uint64_t get64(pint_t addr) { |
| 135 | uint64_t val; |
| 136 | memcpy(&val, (void *)addr, sizeof(val)); |
| 137 | return val; |
| 138 | } |
| 139 | double getDouble(pint_t addr) { |
| 140 | double val; |
| 141 | memcpy(&val, (void *)addr, sizeof(val)); |
| 142 | return val; |
| 143 | } |
| 144 | v128 getVector(pint_t addr) { |
| 145 | v128 val; |
| 146 | memcpy(&val, (void *)addr, sizeof(val)); |
| 147 | return val; |
| 148 | } |
| 149 | uintptr_t getP(pint_t addr); |
| 150 | static uint64_t getULEB128(pint_t &addr, pint_t end); |
| 151 | static int64_t getSLEB128(pint_t &addr, pint_t end); |
| 152 | |
| 153 | pint_t getEncodedP(pint_t &addr, pint_t end, uint8_t encoding, |
| 154 | pint_t datarelBase = 0); |
| 155 | bool findFunctionName(pint_t addr, char *buf, size_t bufLen, |
| 156 | unw_word_t *offset); |
| 157 | bool findUnwindSections(pint_t targetAddr, UnwindInfoSections &info); |
| 158 | bool findOtherFDE(pint_t targetAddr, pint_t &fde); |
| 159 | |
| 160 | static LocalAddressSpace sThisAddressSpace; |
| 161 | }; |
| 162 | |
| 163 | inline uintptr_t LocalAddressSpace::getP(pint_t addr) { |
| 164 | #ifdef __LP64__ |
| 165 | return get64(addr); |
| 166 | #else |
| 167 | return get32(addr); |
| 168 | #endif |
| 169 | } |
| 170 | |
| 171 | /// Read a ULEB128 into a 64-bit word. |
| 172 | inline uint64_t LocalAddressSpace::getULEB128(pint_t &addr, pint_t end) { |
| 173 | const uint8_t *p = (uint8_t *)addr; |
| 174 | const uint8_t *pend = (uint8_t *)end; |
| 175 | uint64_t result = 0; |
| 176 | int bit = 0; |
| 177 | do { |
| 178 | uint64_t b; |
| 179 | |
| 180 | if (p == pend) |
| 181 | _LIBUNWIND_ABORT("truncated uleb128 expression"); |
| 182 | |
| 183 | b = *p & 0x7f; |
| 184 | |
| 185 | if (bit >= 64 || b << bit >> bit != b) { |
| 186 | _LIBUNWIND_ABORT("malformed uleb128 expression"); |
| 187 | } else { |
| 188 | result |= b << bit; |
| 189 | bit += 7; |
| 190 | } |
| 191 | } while (*p++ >= 0x80); |
| 192 | addr = (pint_t) p; |
| 193 | return result; |
| 194 | } |
| 195 | |
| 196 | /// Read a SLEB128 into a 64-bit word. |
| 197 | inline int64_t LocalAddressSpace::getSLEB128(pint_t &addr, pint_t end) { |
| 198 | const uint8_t *p = (uint8_t *)addr; |
| 199 | const uint8_t *pend = (uint8_t *)end; |
| 200 | int64_t result = 0; |
| 201 | int bit = 0; |
| 202 | uint8_t byte; |
| 203 | do { |
| 204 | if (p == pend) |
| 205 | _LIBUNWIND_ABORT("truncated sleb128 expression"); |
| 206 | byte = *p++; |
| 207 | result |= ((byte & 0x7f) << bit); |
| 208 | bit += 7; |
| 209 | } while (byte & 0x80); |
| 210 | // sign extend negative numbers |
| 211 | if ((byte & 0x40) != 0) |
| 212 | result |= (-1LL) << bit; |
| 213 | addr = (pint_t) p; |
| 214 | return result; |
| 215 | } |
| 216 | |
| 217 | inline LocalAddressSpace::pint_t |
| 218 | LocalAddressSpace::getEncodedP(pint_t &addr, pint_t end, uint8_t encoding, |
| 219 | pint_t datarelBase) { |
| 220 | pint_t startAddr = addr; |
| 221 | const uint8_t *p = (uint8_t *)addr; |
| 222 | pint_t result; |
| 223 | |
| 224 | // first get value |
| 225 | switch (encoding & 0x0F) { |
| 226 | case DW_EH_PE_ptr: |
| 227 | result = getP(addr); |
| 228 | p += sizeof(pint_t); |
| 229 | addr = (pint_t) p; |
| 230 | break; |
| 231 | case DW_EH_PE_uleb128: |
| 232 | result = (pint_t)getULEB128(addr, end); |
| 233 | break; |
| 234 | case DW_EH_PE_udata2: |
| 235 | result = get16(addr); |
| 236 | p += 2; |
| 237 | addr = (pint_t) p; |
| 238 | break; |
| 239 | case DW_EH_PE_udata4: |
| 240 | result = get32(addr); |
| 241 | p += 4; |
| 242 | addr = (pint_t) p; |
| 243 | break; |
| 244 | case DW_EH_PE_udata8: |
| 245 | result = (pint_t)get64(addr); |
| 246 | p += 8; |
| 247 | addr = (pint_t) p; |
| 248 | break; |
| 249 | case DW_EH_PE_sleb128: |
| 250 | result = (pint_t)getSLEB128(addr, end); |
| 251 | break; |
| 252 | case DW_EH_PE_sdata2: |
| 253 | // Sign extend from signed 16-bit value. |
| 254 | result = (pint_t)(int16_t)get16(addr); |
| 255 | p += 2; |
| 256 | addr = (pint_t) p; |
| 257 | break; |
| 258 | case DW_EH_PE_sdata4: |
| 259 | // Sign extend from signed 32-bit value. |
| 260 | result = (pint_t)(int32_t)get32(addr); |
| 261 | p += 4; |
| 262 | addr = (pint_t) p; |
| 263 | break; |
| 264 | case DW_EH_PE_sdata8: |
| 265 | result = (pint_t)get64(addr); |
| 266 | p += 8; |
| 267 | addr = (pint_t) p; |
| 268 | break; |
| 269 | default: |
| 270 | _LIBUNWIND_ABORT("unknown pointer encoding"); |
| 271 | } |
| 272 | |
| 273 | // then add relative offset |
| 274 | switch (encoding & 0x70) { |
| 275 | case DW_EH_PE_absptr: |
| 276 | // do nothing |
| 277 | break; |
| 278 | case DW_EH_PE_pcrel: |
| 279 | result += startAddr; |
| 280 | break; |
| 281 | case DW_EH_PE_textrel: |
| 282 | _LIBUNWIND_ABORT("DW_EH_PE_textrel pointer encoding not supported"); |
| 283 | break; |
| 284 | case DW_EH_PE_datarel: |
| 285 | // DW_EH_PE_datarel is only valid in a few places, so the parameter has a |
| 286 | // default value of 0, and we abort in the event that someone calls this |
| 287 | // function with a datarelBase of 0 and DW_EH_PE_datarel encoding. |
| 288 | if (datarelBase == 0) |
| 289 | _LIBUNWIND_ABORT("DW_EH_PE_datarel is invalid with a datarelBase of 0"); |
| 290 | result += datarelBase; |
| 291 | break; |
| 292 | case DW_EH_PE_funcrel: |
| 293 | _LIBUNWIND_ABORT("DW_EH_PE_funcrel pointer encoding not supported"); |
| 294 | break; |
| 295 | case DW_EH_PE_aligned: |
| 296 | _LIBUNWIND_ABORT("DW_EH_PE_aligned pointer encoding not supported"); |
| 297 | break; |
| 298 | default: |
| 299 | _LIBUNWIND_ABORT("unknown pointer encoding"); |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | if (encoding & DW_EH_PE_indirect) |
| 304 | result = getP(result); |
| 305 | |
| 306 | return result; |
| 307 | } |
| 308 | |
| 309 | #ifdef __APPLE__ |
| 310 | struct dyld_unwind_sections |
| 311 | { |
| 312 | const struct mach_header* mh; |
| 313 | const void* dwarf_section; |
| 314 | uintptr_t dwarf_section_length; |
| 315 | const void* compact_unwind_section; |
| 316 | uintptr_t compact_unwind_section_length; |
| 317 | }; |
| 318 | #if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) \ |
| 319 | && (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1070)) \ |
| 320 | || defined(__IPHONE_OS_VERSION_MIN_REQUIRED) |
| 321 | // In 10.7.0 or later, libSystem.dylib implements this function. |
| 322 | extern "C" bool _dyld_find_unwind_sections(void *, dyld_unwind_sections *); |
| 323 | #else |
| 324 | // In 10.6.x and earlier, we need to implement this functionality. |
| 325 | static inline bool _dyld_find_unwind_sections(void* addr, |
| 326 | dyld_unwind_sections* info) { |
| 327 | // Find mach-o image containing address. |
| 328 | Dl_info dlinfo; |
| 329 | if (!dladdr(addr, &dlinfo)) |
| 330 | return false; |
| 331 | const mach_header *mh = (const mach_header *)dlinfo.dli_saddr; |
| 332 | |
Ed Maste | 63469ff | 2016-07-19 17:15:50 +0000 | [diff] [blame] | 333 | // Find DWARF unwind section in that image. |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 334 | unsigned long size; |
| 335 | const uint8_t *p = getsectiondata(mh, "__TEXT", "__eh_frame", &size); |
| 336 | if (!p) |
| 337 | return false; |
| 338 | |
| 339 | // Fill in return struct. |
| 340 | info->mh = mh; |
| 341 | info->dwarf_section = p; |
| 342 | info->dwarf_section_length = size; |
| 343 | info->compact_unwind_section = 0; |
| 344 | info->compact_unwind_section_length = 0; |
| 345 | |
| 346 | return true; |
| 347 | } |
| 348 | #endif |
| 349 | #endif |
| 350 | |
| 351 | inline bool LocalAddressSpace::findUnwindSections(pint_t targetAddr, |
| 352 | UnwindInfoSections &info) { |
| 353 | #ifdef __APPLE__ |
| 354 | dyld_unwind_sections dyldInfo; |
| 355 | if (_dyld_find_unwind_sections((void *)targetAddr, &dyldInfo)) { |
| 356 | info.dso_base = (uintptr_t)dyldInfo.mh; |
| 357 | #if _LIBUNWIND_SUPPORT_DWARF_UNWIND |
| 358 | info.dwarf_section = (uintptr_t)dyldInfo.dwarf_section; |
| 359 | info.dwarf_section_length = dyldInfo.dwarf_section_length; |
| 360 | #endif |
| 361 | info.compact_unwind_section = (uintptr_t)dyldInfo.compact_unwind_section; |
| 362 | info.compact_unwind_section_length = dyldInfo.compact_unwind_section_length; |
| 363 | return true; |
| 364 | } |
Logan Chien | 6127858 | 2015-07-19 15:23:10 +0000 | [diff] [blame] | 365 | #elif _LIBUNWIND_ARM_EHABI |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 366 | #ifdef _LIBUNWIND_IS_BAREMETAL |
| 367 | // Bare metal is statically linked, so no need to ask the dynamic loader |
| 368 | info.arm_section = (uintptr_t)(&__exidx_start); |
| 369 | info.arm_section_length = (uintptr_t)(&__exidx_end - &__exidx_start); |
| 370 | #else |
| 371 | int length = 0; |
| 372 | info.arm_section = (uintptr_t) dl_unwind_find_exidx( |
| 373 | (_Unwind_Ptr) targetAddr, &length); |
| 374 | info.arm_section_length = (uintptr_t)length; |
| 375 | #endif |
Ed Maste | adc2908 | 2016-08-30 15:38:10 +0000 | [diff] [blame] | 376 | _LIBUNWIND_TRACE_UNWINDING("findUnwindSections: section %X length %x", |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 377 | info.arm_section, info.arm_section_length); |
| 378 | if (info.arm_section && info.arm_section_length) |
| 379 | return true; |
| 380 | #elif _LIBUNWIND_SUPPORT_DWARF_UNWIND |
| 381 | #if _LIBUNWIND_SUPPORT_DWARF_INDEX |
| 382 | struct dl_iterate_cb_data { |
| 383 | LocalAddressSpace *addressSpace; |
| 384 | UnwindInfoSections *sects; |
| 385 | uintptr_t targetAddr; |
| 386 | }; |
| 387 | |
| 388 | dl_iterate_cb_data cb_data = {this, &info, targetAddr}; |
| 389 | int found = dl_iterate_phdr( |
| 390 | [](struct dl_phdr_info *pinfo, size_t, void *data) -> int { |
| 391 | auto cbdata = static_cast<dl_iterate_cb_data *>(data); |
| 392 | size_t object_length; |
| 393 | bool found_obj = false; |
| 394 | bool found_hdr = false; |
| 395 | |
| 396 | assert(cbdata); |
| 397 | assert(cbdata->sects); |
| 398 | |
| 399 | if (cbdata->targetAddr < pinfo->dlpi_addr) { |
| 400 | return false; |
| 401 | } |
| 402 | |
Viktor Kutuzov | 9ed9c3b | 2015-05-06 10:32:28 +0000 | [diff] [blame] | 403 | #if !defined(Elf_Half) |
| 404 | typedef ElfW(Half) Elf_Half; |
| 405 | #endif |
| 406 | #if !defined(Elf_Phdr) |
| 407 | typedef ElfW(Phdr) Elf_Phdr; |
| 408 | #endif |
| 409 | |
| 410 | for (Elf_Half i = 0; i < pinfo->dlpi_phnum; i++) { |
| 411 | const Elf_Phdr *phdr = &pinfo->dlpi_phdr[i]; |
Saleem Abdulrasool | 675df58 | 2015-04-24 19:39:17 +0000 | [diff] [blame] | 412 | if (phdr->p_type == PT_LOAD) { |
| 413 | uintptr_t begin = pinfo->dlpi_addr + phdr->p_vaddr; |
| 414 | uintptr_t end = begin + phdr->p_memsz; |
| 415 | if (cbdata->targetAddr >= begin && cbdata->targetAddr < end) { |
| 416 | cbdata->sects->dso_base = begin; |
| 417 | object_length = phdr->p_memsz; |
| 418 | found_obj = true; |
| 419 | } |
| 420 | } else if (phdr->p_type == PT_GNU_EH_FRAME) { |
| 421 | EHHeaderParser<LocalAddressSpace>::EHHeaderInfo hdrInfo; |
| 422 | uintptr_t eh_frame_hdr_start = pinfo->dlpi_addr + phdr->p_vaddr; |
| 423 | cbdata->sects->dwarf_index_section = eh_frame_hdr_start; |
| 424 | cbdata->sects->dwarf_index_section_length = phdr->p_memsz; |
| 425 | EHHeaderParser<LocalAddressSpace>::decodeEHHdr( |
| 426 | *cbdata->addressSpace, eh_frame_hdr_start, phdr->p_memsz, |
| 427 | hdrInfo); |
| 428 | cbdata->sects->dwarf_section = hdrInfo.eh_frame_ptr; |
| 429 | found_hdr = true; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | if (found_obj && found_hdr) { |
| 434 | cbdata->sects->dwarf_section_length = object_length; |
| 435 | return true; |
| 436 | } else { |
| 437 | return false; |
| 438 | } |
| 439 | }, |
| 440 | &cb_data); |
| 441 | return static_cast<bool>(found); |
| 442 | #else |
| 443 | #error "_LIBUNWIND_SUPPORT_DWARF_UNWIND requires _LIBUNWIND_SUPPORT_DWARF_INDEX on this platform." |
| 444 | #endif |
| 445 | #endif |
| 446 | |
| 447 | return false; |
| 448 | } |
| 449 | |
| 450 | |
| 451 | inline bool LocalAddressSpace::findOtherFDE(pint_t targetAddr, pint_t &fde) { |
| 452 | #ifdef __APPLE__ |
| 453 | return checkKeyMgrRegisteredFDEs(targetAddr, *((void**)&fde)); |
| 454 | #else |
| 455 | // TO DO: if OS has way to dynamically register FDEs, check that. |
| 456 | (void)targetAddr; |
| 457 | (void)fde; |
| 458 | return false; |
| 459 | #endif |
| 460 | } |
| 461 | |
| 462 | inline bool LocalAddressSpace::findFunctionName(pint_t addr, char *buf, |
| 463 | size_t bufLen, |
| 464 | unw_word_t *offset) { |
| 465 | #ifndef _LIBUNWIND_IS_BAREMETAL |
| 466 | Dl_info dyldInfo; |
| 467 | if (dladdr((void *)addr, &dyldInfo)) { |
| 468 | if (dyldInfo.dli_sname != NULL) { |
| 469 | snprintf(buf, bufLen, "%s", dyldInfo.dli_sname); |
| 470 | *offset = (addr - (pint_t) dyldInfo.dli_saddr); |
| 471 | return true; |
| 472 | } |
| 473 | } |
| 474 | #endif |
| 475 | return false; |
| 476 | } |
| 477 | |
| 478 | |
| 479 | |
| 480 | #ifdef UNW_REMOTE |
| 481 | |
| 482 | /// OtherAddressSpace is used as a template parameter to UnwindCursor when |
| 483 | /// unwinding a thread in the another process. The other process can be a |
| 484 | /// different endianness and a different pointer size which is handled by |
| 485 | /// the P template parameter. |
| 486 | template <typename P> |
| 487 | class OtherAddressSpace { |
| 488 | public: |
| 489 | OtherAddressSpace(task_t task) : fTask(task) {} |
| 490 | |
| 491 | typedef typename P::uint_t pint_t; |
| 492 | |
| 493 | uint8_t get8(pint_t addr); |
| 494 | uint16_t get16(pint_t addr); |
| 495 | uint32_t get32(pint_t addr); |
| 496 | uint64_t get64(pint_t addr); |
| 497 | pint_t getP(pint_t addr); |
| 498 | uint64_t getULEB128(pint_t &addr, pint_t end); |
| 499 | int64_t getSLEB128(pint_t &addr, pint_t end); |
| 500 | pint_t getEncodedP(pint_t &addr, pint_t end, uint8_t encoding, |
| 501 | pint_t datarelBase = 0); |
| 502 | bool findFunctionName(pint_t addr, char *buf, size_t bufLen, |
| 503 | unw_word_t *offset); |
| 504 | bool findUnwindSections(pint_t targetAddr, UnwindInfoSections &info); |
| 505 | bool findOtherFDE(pint_t targetAddr, pint_t &fde); |
| 506 | private: |
| 507 | void *localCopy(pint_t addr); |
| 508 | |
| 509 | task_t fTask; |
| 510 | }; |
| 511 | |
| 512 | template <typename P> uint8_t OtherAddressSpace<P>::get8(pint_t addr) { |
| 513 | return *((uint8_t *)localCopy(addr)); |
| 514 | } |
| 515 | |
| 516 | template <typename P> uint16_t OtherAddressSpace<P>::get16(pint_t addr) { |
| 517 | return P::E::get16(*(uint16_t *)localCopy(addr)); |
| 518 | } |
| 519 | |
| 520 | template <typename P> uint32_t OtherAddressSpace<P>::get32(pint_t addr) { |
| 521 | return P::E::get32(*(uint32_t *)localCopy(addr)); |
| 522 | } |
| 523 | |
| 524 | template <typename P> uint64_t OtherAddressSpace<P>::get64(pint_t addr) { |
| 525 | return P::E::get64(*(uint64_t *)localCopy(addr)); |
| 526 | } |
| 527 | |
| 528 | template <typename P> |
| 529 | typename P::uint_t OtherAddressSpace<P>::getP(pint_t addr) { |
| 530 | return P::getP(*(uint64_t *)localCopy(addr)); |
| 531 | } |
| 532 | |
| 533 | template <typename P> |
| 534 | uint64_t OtherAddressSpace<P>::getULEB128(pint_t &addr, pint_t end) { |
| 535 | uintptr_t size = (end - addr); |
| 536 | LocalAddressSpace::pint_t laddr = (LocalAddressSpace::pint_t) localCopy(addr); |
| 537 | LocalAddressSpace::pint_t sladdr = laddr; |
| 538 | uint64_t result = LocalAddressSpace::getULEB128(laddr, laddr + size); |
| 539 | addr += (laddr - sladdr); |
| 540 | return result; |
| 541 | } |
| 542 | |
| 543 | template <typename P> |
| 544 | int64_t OtherAddressSpace<P>::getSLEB128(pint_t &addr, pint_t end) { |
| 545 | uintptr_t size = (end - addr); |
| 546 | LocalAddressSpace::pint_t laddr = (LocalAddressSpace::pint_t) localCopy(addr); |
| 547 | LocalAddressSpace::pint_t sladdr = laddr; |
| 548 | uint64_t result = LocalAddressSpace::getSLEB128(laddr, laddr + size); |
| 549 | addr += (laddr - sladdr); |
| 550 | return result; |
| 551 | } |
| 552 | |
| 553 | template <typename P> void *OtherAddressSpace<P>::localCopy(pint_t addr) { |
| 554 | // FIX ME |
| 555 | } |
| 556 | |
| 557 | template <typename P> |
| 558 | bool OtherAddressSpace<P>::findFunctionName(pint_t addr, char *buf, |
| 559 | size_t bufLen, unw_word_t *offset) { |
| 560 | // FIX ME |
| 561 | } |
| 562 | |
| 563 | /// unw_addr_space is the base class that abstract unw_addr_space_t type in |
| 564 | /// libunwind.h points to. |
| 565 | struct unw_addr_space { |
| 566 | cpu_type_t cpuType; |
| 567 | task_t taskPort; |
| 568 | }; |
| 569 | |
| 570 | /// unw_addr_space_i386 is the concrete instance that a unw_addr_space_t points |
| 571 | /// to when examining |
| 572 | /// a 32-bit intel process. |
| 573 | struct unw_addr_space_i386 : public unw_addr_space { |
| 574 | unw_addr_space_i386(task_t task) : oas(task) {} |
| 575 | OtherAddressSpace<Pointer32<LittleEndian> > oas; |
| 576 | }; |
| 577 | |
| 578 | /// unw_addr_space_x86_64 is the concrete instance that a unw_addr_space_t |
| 579 | /// points to when examining |
| 580 | /// a 64-bit intel process. |
| 581 | struct unw_addr_space_x86_64 : public unw_addr_space { |
| 582 | unw_addr_space_x86_64(task_t task) : oas(task) {} |
| 583 | OtherAddressSpace<Pointer64<LittleEndian> > oas; |
| 584 | }; |
| 585 | |
| 586 | /// unw_addr_space_ppc is the concrete instance that a unw_addr_space_t points |
| 587 | /// to when examining |
| 588 | /// a 32-bit PowerPC process. |
| 589 | struct unw_addr_space_ppc : public unw_addr_space { |
| 590 | unw_addr_space_ppc(task_t task) : oas(task) {} |
| 591 | OtherAddressSpace<Pointer32<BigEndian> > oas; |
| 592 | }; |
| 593 | |
| 594 | #endif // UNW_REMOTE |
| 595 | |
| 596 | } // namespace libunwind |
| 597 | |
| 598 | #endif // __ADDRESSSPACE_HPP__ |