1b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik//===--------------------- UnwindLevel1-gcc-ext.c -------------------------===// 2b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 3b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// The LLVM Compiler Infrastructure 4b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 5b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// This file is dual licensed under the MIT and the University of Illinois Open 6b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// Source Licenses. See LICENSE.TXT for details. 7b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 8b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 9b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// Implements gcc extensions to the C++ ABI Exception Handling Level 1. 10b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// 11b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik//===----------------------------------------------------------------------===// 12b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 13b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include <stdint.h> 14b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include <stdbool.h> 15b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include <stdlib.h> 16b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include <stdio.h> 17b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 18b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "libunwind.h" 19b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "unwind.h" 20b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "libunwind_ext.h" 21b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#include "config.h" 22b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 23b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if _LIBUNWIND_BUILD_ZERO_COST_APIS 24b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 25b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Called by __cxa_rethrow(). 26b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT _Unwind_Reason_Code 27e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert_Unwind_Resume_or_Rethrow(_Unwind_Exception *exception_object) { 28b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_Resume_or_Rethrow(ex_obj=%p), " 29e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert "private_1=%ld\n", 30e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert exception_object, 31e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#if LIBCXXABI_ARM_EHABI 32e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert (long)exception_object->unwinder_cache.reserved1); 33e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#else 34e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert (long)exception_object->private_1); 35e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#endif 36e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert 37e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#if LIBCXXABI_ARM_EHABI 38e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert // _Unwind_RaiseException on EHABI will always set the reserved1 field to 0, 39e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert // which is in the same position as private_1 below. 40e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert return _Unwind_RaiseException(exception_object); 41e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#else 42b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // If this is non-forced and a stopping place was found, then this is a 43b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // re-throw. 44b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // Call _Unwind_RaiseException() as if this was a new exception 45b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (exception_object->private_1 == 0) { 46b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return _Unwind_RaiseException(exception_object); 47b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // Will return if there is no catch clause, so that __cxa_rethrow can call 48b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // std::terminate(). 49b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 50b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 51b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // Call through to _Unwind_Resume() which distiguishes between forced and 52b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // regular exceptions. 53b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _Unwind_Resume(exception_object); 54b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_ABORT("_Unwind_Resume_or_Rethrow() called _Unwind_RaiseException()" 55b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik " which unexpectedly returned"); 56e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert#endif 57b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 58b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 59b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 60b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Called by personality handler during phase 2 to get base address for data 61b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// relative encodings. 62b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT uintptr_t 63b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_Unwind_GetDataRelBase(struct _Unwind_Context *context) { 64b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)context; 65b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_GetDataRelBase(context=%p)\n", context); 66b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_ABORT("_Unwind_GetDataRelBase() not implemented"); 67b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 68b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 69b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 70b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Called by personality handler during phase 2 to get base address for text 71b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// relative encodings. 72b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT uintptr_t 73b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_Unwind_GetTextRelBase(struct _Unwind_Context *context) { 74b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)context; 75b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_GetTextRelBase(context=%p)\n", context); 76b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_ABORT("_Unwind_GetTextRelBase() not implemented"); 77b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 78b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 79b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 80b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Scans unwind information to find the function that contains the 81b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// specified code address "pc". 82b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void *_Unwind_FindEnclosingFunction(void *pc) { 83b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_FindEnclosingFunction(pc=%p)\n", pc); 84b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // This is slow, but works. 85b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // We create an unwind cursor then alter the IP to be pc 86b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_cursor_t cursor; 87b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_context_t uc; 88b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_proc_info_t info; 89b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_getcontext(&uc); 90b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_init_local(&cursor, &uc); 91b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_set_reg(&cursor, UNW_REG_IP, (unw_word_t)(long) pc); 92b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (unw_get_proc_info(&cursor, &info) == UNW_ESUCCESS) 93b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return (void *)(long) info.start_ip; 94b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik else 95b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return NULL; 96b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 97b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 98b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 99b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Walk every frame and call trace function at each one. If trace function 100b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// returns anything other than _URC_NO_REASON, then walk is terminated. 101b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT _Unwind_Reason_Code 102b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref) { 103b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_cursor_t cursor; 104b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_context_t uc; 105b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_getcontext(&uc); 106b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_init_local(&cursor, &uc); 107b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 108b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_Backtrace(callback=%p)\n", callback); 109b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 110b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // walk each frame 111b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik while (true) { 112605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert _Unwind_Reason_Code result; 113b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 114b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // ask libuwind to get next frame (skip over first frame which is 115b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // _Unwind_Backtrace()) 116b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (unw_step(&cursor) <= 0) { 117b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_UNWINDING(" _backtrace: ended because cursor reached " 118b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik "bottom of stack, returning %d\n", 119b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _URC_END_OF_STACK); 120b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return _URC_END_OF_STACK; 121b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 122b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 123605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert#if LIBCXXABI_ARM_EHABI 124605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert // Get the information for this frame. 125605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert unw_proc_info_t frameInfo; 126605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert if (unw_get_proc_info(&cursor, &frameInfo) != UNW_ESUCCESS) { 127605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert return _URC_END_OF_STACK; 128605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert } 129605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert 130605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert struct _Unwind_Context *context = (struct _Unwind_Context *)&cursor; 131605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert size_t off; 132605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert size_t len; 133605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert uint32_t* unwindInfo = (uint32_t *) frameInfo.unwind_info; 134605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert unwindInfo = decode_eht_entry(unwindInfo, &off, &len); 135605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert if (unwindInfo == NULL) { 136605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert return _URC_FAILURE; 137605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert } 138605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert 139605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert result = _Unwind_VRS_Interpret(context, unwindInfo, off, len); 140605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert if (result != _URC_CONTINUE_UNWIND) { 141605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert return _URC_END_OF_STACK; 142605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert } 143605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert#endif // LIBCXXABI_ARM_EHABI 144605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert 145b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // debugging 146b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (_LIBUNWIND_TRACING_UNWINDING) { 147b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik char functionName[512]; 148b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_proc_info_t frameInfo; 149b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_word_t offset; 150b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_get_proc_name(&cursor, functionName, 512, &offset); 151b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_get_proc_info(&cursor, &frameInfo); 152b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_UNWINDING( 153b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik " _backtrace: start_ip=0x%llX, func=%s, lsda=0x%llX, context=%p\n", 154e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert (long long)frameInfo.start_ip, functionName, (long long)frameInfo.lsda, 155e45805f0d3f8dafef1297cc7dc49e610713f023bDan Albert &cursor); 156b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 157b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 158b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // call trace function with this frame 159605f03260ce43ec564cd0ec80ea21514e82eeeb3Dan Albert result = (*callback)((struct _Unwind_Context *)(&cursor), ref); 160b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik if (result != _URC_NO_REASON) { 161b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_UNWINDING(" _backtrace: ended because callback " 162b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik "returned %d\n", 163b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik result); 164b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return result; 165b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 166b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik } 167b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 168b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 169b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 170b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Find dwarf unwind info for an address 'pc' in some function. 171b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT const void *_Unwind_Find_FDE(const void *pc, 172b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik struct dwarf_eh_bases *bases) { 173b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // This is slow, but works. 174b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // We create an unwind cursor then alter the IP to be pc 175b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_cursor_t cursor; 176b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_context_t uc; 177b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_proc_info_t info; 178b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_getcontext(&uc); 179b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_init_local(&cursor, &uc); 180b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_set_reg(&cursor, UNW_REG_IP, (unw_word_t)(long) pc); 181b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_get_proc_info(&cursor, &info); 182b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik bases->tbase = (uintptr_t)info.extra; 183b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik bases->dbase = 0; // dbase not used on Mac OS X 184b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik bases->func = (uintptr_t)info.start_ip; 185b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_Find_FDE(pc=%p) => %p\n", pc, 186b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void *)(long) info.unwind_info); 187b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return (void *)(long) info.unwind_info; 188b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 189b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 190b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Returns the CFA (call frame area, or stack pointer at start of function) 191b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// for the current context. 192b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT uintptr_t _Unwind_GetCFA(struct _Unwind_Context *context) { 193b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_cursor_t *cursor = (unw_cursor_t *)context; 194b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_word_t result; 195b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik unw_get_reg(cursor, UNW_REG_SP, &result); 196b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_GetCFA(context=%p) => 0x%llX\n", context, 197b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (uint64_t) result); 198b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return (uintptr_t)result; 199b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 200b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 201b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 202b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Called by personality handler during phase 2 to get instruction pointer. 203b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// ipBefore is a boolean that says if IP is already adjusted to be the call 204b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// site address. Normally IP is the return address. 205b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context *context, 206b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik int *ipBefore) { 207b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("_Unwind_GetIPInfo(context=%p)\n", context); 208b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik *ipBefore = 0; 209b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return _Unwind_GetIP(context); 210b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 211b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 212b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if _LIBUNWIND_SUPPORT_DWARF_UNWIND 213b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 214b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Called by programs with dynamic code generators that want 215b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// to register a dynamically generated FDE. 216b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// This function has existed on Mac OS X since 10.4, but 217b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// was broken until 10.6. 218b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __register_frame(const void *fde) { 219b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__register_frame(%p)\n", fde); 220b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _unw_add_dynamic_fde((unw_word_t)(uintptr_t) fde); 221b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 222b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 223b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 224b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// Called by programs with dynamic code generators that want 225b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// to unregister a dynamically generated FDE. 226b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// This function has existed on Mac OS X since 10.4, but 227b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik/// was broken until 10.6. 228b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __deregister_frame(const void *fde) { 229b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__deregister_frame(%p)\n", fde); 230b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _unw_remove_dynamic_fde((unw_word_t)(uintptr_t) fde); 231b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 232b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 233b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 234b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// The following register/deregister functions are gcc extensions. 235b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// They have existed on Mac OS X, but have never worked because Mac OS X 236b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// before 10.6 used keymgr to track known FDEs, but these functions 237b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// never got updated to use keymgr. 238b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// For now, we implement these as do-nothing functions to keep any existing 239b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// applications working. We also add the not in 10.6 symbol so that nwe 240b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik// application won't be able to use them. 241b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 242b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#if _LIBUNWIND_SUPPORT_FRAME_APIS 243b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __register_frame_info_bases(const void *fde, void *ob, 244b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik void *tb, void *db) { 245b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 246b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)ob; 247b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)tb; 248b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)db; 249b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__register_frame_info_bases(%p,%p, %p, %p)\n", 250b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik fde, ob, tb, db); 251b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 252b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 253b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 254b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __register_frame_info(const void *fde, void *ob) { 255b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 256b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)ob; 257b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__register_frame_info(%p, %p)\n", fde, ob); 258b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 259b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 260b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 261b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __register_frame_info_table_bases(const void *fde, 262b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik void *ob, void *tb, 263b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik void *db) { 264b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 265b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)ob; 266b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)tb; 267b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)db; 268b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__register_frame_info_table_bases" 269b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik "(%p,%p, %p, %p)\n", fde, ob, tb, db); 270b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 271b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 272b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 273b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __register_frame_info_table(const void *fde, void *ob) { 274b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 275b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)ob; 276b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__register_frame_info_table(%p, %p)\n", fde, ob); 277b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 278b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 279b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 280b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void __register_frame_table(const void *fde) { 281b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 282b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__register_frame_table(%p)\n", fde); 283b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 284b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 285b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 286b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void *__deregister_frame_info(const void *fde) { 287b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 288b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__deregister_frame_info(%p)\n", fde); 289b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 290b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return NULL; 291b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 292b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 293b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik_LIBUNWIND_EXPORT void *__deregister_frame_info_bases(const void *fde) { 294b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik (void)fde; 295b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik _LIBUNWIND_TRACE_API("__deregister_frame_info_bases(%p)\n", fde); 296b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik // do nothing, this function never worked in Mac OS X 297b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik return NULL; 298b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik} 299b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // _LIBUNWIND_SUPPORT_FRAME_APIS 300b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 301b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // _LIBUNWIND_SUPPORT_DWARF_UNWIND 302b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik 303b78da9875b6e35187b5d584746c78faaf3230a3dNick Kledzik#endif // _LIBUNWIND_BUILD_ZERO_COST_APIS 304