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comparison libunwind/src/AddressSpace.hpp @ 252:1f2b6ac9f198 llvm-original

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LLVM16-1
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Fri, 18 Aug 2023 09:04:13 +0900
parents c4bab56944e8
children
comparison
equal deleted inserted replaced
237:c80f45b162ad 252:1f2b6ac9f198
63 uintptr_t compact_unwind_section_length; 63 uintptr_t compact_unwind_section_length;
64 }; 64 };
65 65
66 // In 10.7.0 or later, libSystem.dylib implements this function. 66 // In 10.7.0 or later, libSystem.dylib implements this function.
67 extern "C" bool _dyld_find_unwind_sections(void *, dyld_unwind_sections *); 67 extern "C" bool _dyld_find_unwind_sections(void *, dyld_unwind_sections *);
68
69 namespace libunwind {
70 bool findDynamicUnwindSections(void *, unw_dynamic_unwind_sections *);
71 }
68 72
69 #elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) && defined(_LIBUNWIND_IS_BAREMETAL) 73 #elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) && defined(_LIBUNWIND_IS_BAREMETAL)
70 74
71 // When statically linked on bare-metal, the symbols for the EH table are looked 75 // When statically linked on bare-metal, the symbols for the EH table are looked
72 // up without going through the dynamic loader. 76 // up without going through the dynamic loader.
244 248
245 /// Read a SLEB128 into a 64-bit word. 249 /// Read a SLEB128 into a 64-bit word.
246 inline int64_t LocalAddressSpace::getSLEB128(pint_t &addr, pint_t end) { 250 inline int64_t LocalAddressSpace::getSLEB128(pint_t &addr, pint_t end) {
247 const uint8_t *p = (uint8_t *)addr; 251 const uint8_t *p = (uint8_t *)addr;
248 const uint8_t *pend = (uint8_t *)end; 252 const uint8_t *pend = (uint8_t *)end;
249 int64_t result = 0; 253 uint64_t result = 0;
250 int bit = 0; 254 int bit = 0;
251 uint8_t byte; 255 uint8_t byte;
252 do { 256 do {
253 if (p == pend) 257 if (p == pend)
254 _LIBUNWIND_ABORT("truncated sleb128 expression"); 258 _LIBUNWIND_ABORT("truncated sleb128 expression");
258 } while (byte & 0x80); 262 } while (byte & 0x80);
259 // sign extend negative numbers 263 // sign extend negative numbers
260 if ((byte & 0x40) != 0 && bit < 64) 264 if ((byte & 0x40) != 0 && bit < 64)
261 result |= (-1ULL) << bit; 265 result |= (-1ULL) << bit;
262 addr = (pint_t) p; 266 addr = (pint_t) p;
263 return result; 267 return (int64_t)result;
264 } 268 }
265 269
266 inline LocalAddressSpace::pint_t 270 inline LocalAddressSpace::pint_t
267 LocalAddressSpace::getEncodedP(pint_t &addr, pint_t end, uint8_t encoding, 271 LocalAddressSpace::getEncodedP(pint_t &addr, pint_t end, uint8_t encoding,
268 pint_t datarelBase) { 272 pint_t datarelBase) {
495 #endif 499 #endif
496 info.compact_unwind_section = (uintptr_t)dyldInfo.compact_unwind_section; 500 info.compact_unwind_section = (uintptr_t)dyldInfo.compact_unwind_section;
497 info.compact_unwind_section_length = (size_t)dyldInfo.compact_unwind_section_length; 501 info.compact_unwind_section_length = (size_t)dyldInfo.compact_unwind_section_length;
498 return true; 502 return true;
499 } 503 }
504
505 unw_dynamic_unwind_sections dynamicUnwindSectionInfo;
506 if (findDynamicUnwindSections((void *)targetAddr,
507 &dynamicUnwindSectionInfo)) {
508 info.dso_base = dynamicUnwindSectionInfo.dso_base;
509 #if defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
510 info.dwarf_section = (uintptr_t)dynamicUnwindSectionInfo.dwarf_section;
511 info.dwarf_section_length = dynamicUnwindSectionInfo.dwarf_section_length;
512 #endif
513 info.compact_unwind_section =
514 (uintptr_t)dynamicUnwindSectionInfo.compact_unwind_section;
515 info.compact_unwind_section_length =
516 dynamicUnwindSectionInfo.compact_unwind_section_length;
517 return true;
518 }
519
500 #elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) && defined(_LIBUNWIND_IS_BAREMETAL) 520 #elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) && defined(_LIBUNWIND_IS_BAREMETAL)
501 info.dso_base = 0; 521 info.dso_base = 0;
502 // Bare metal is statically linked, so no need to ask the dynamic loader 522 // Bare metal is statically linked, so no need to ask the dynamic loader
503 info.dwarf_section_length = (size_t)(&__eh_frame_end - &__eh_frame_start); 523 info.dwarf_section_length = (size_t)(&__eh_frame_end - &__eh_frame_start);
504 info.dwarf_section = (uintptr_t)(&__eh_frame_start); 524 info.dwarf_section = (uintptr_t)(&__eh_frame_start);