diff options
Diffstat (limited to 'src/libunwind.cpp')
| -rw-r--r-- | src/libunwind.cpp | 124 |
1 files changed, 26 insertions, 98 deletions
diff --git a/src/libunwind.cpp b/src/libunwind.cpp index 0b7fb40..03dfeae 100644 --- a/src/libunwind.cpp +++ b/src/libunwind.cpp @@ -1,9 +1,8 @@ //===--------------------------- libunwind.cpp ----------------------------===// // -// The LLVM Compiler Infrastructure -// -// This file is dual licensed under the MIT and the University of Illinois Open -// Source Licenses. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // // // Implements unw_* functions from <libunwind.h> @@ -12,12 +11,6 @@ #include <libunwind.h> -#ifndef NDEBUG -#include <cstdlib> // getenv -#endif -#include <new> -#include <algorithm> - #include "libunwind_ext.h" #include "config.h" @@ -51,6 +44,8 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, # define REGISTER_KIND Registers_x86 #elif defined(__x86_64__) # define REGISTER_KIND Registers_x86_64 +#elif defined(__powerpc64__) +# define REGISTER_KIND Registers_ppc64 #elif defined(__ppc__) # define REGISTER_KIND Registers_ppc #elif defined(__aarch64__) @@ -59,18 +54,21 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, # define REGISTER_KIND Registers_arm #elif defined(__or1k__) # define REGISTER_KIND Registers_or1k -#elif defined(__mips__) && defined(_ABIO32) && defined(__mips_soft_float) +#elif defined(__mips__) && defined(_ABIO32) && _MIPS_SIM == _ABIO32 # define REGISTER_KIND Registers_mips_o32 -#elif defined(__mips__) && defined(_ABI64) && defined(__mips_soft_float) -# define REGISTER_KIND Registers_mips_n64 +#elif defined(__mips64) +# define REGISTER_KIND Registers_mips_newabi #elif defined(__mips__) # warning The MIPS architecture is not supported with this ABI and environment! +#elif defined(__sparc__) +# define REGISTER_KIND Registers_sparc #else # error Architecture not supported #endif // Use "placement new" to allocate UnwindCursor in the cursor buffer. - new ((void *)cursor) UnwindCursor<LocalAddressSpace, REGISTER_KIND>( - context, LocalAddressSpace::sThisAddressSpace); + new (reinterpret_cast<UnwindCursor<LocalAddressSpace, REGISTER_KIND> *>(cursor)) + UnwindCursor<LocalAddressSpace, REGISTER_KIND>( + context, LocalAddressSpace::sThisAddressSpace); #undef REGISTER_KIND AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; co->setInfoBasedOnIPRegister(); @@ -78,88 +76,6 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, return UNW_ESUCCESS; } -#ifdef UNW_REMOTE -/// Create a cursor into a thread in another process. -_LIBUNWIND_EXPORT int unw_init_remote_thread(unw_cursor_t *cursor, - unw_addr_space_t as, - void *arg) { - // special case: unw_init_remote(xx, unw_local_addr_space, xx) - if (as == (unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace) - return unw_init_local(cursor, NULL); //FIXME - - // use "placement new" to allocate UnwindCursor in the cursor buffer - switch (as->cpuType) { - case CPU_TYPE_I386: - new ((void *)cursor) - UnwindCursor<RemoteAddressSpace<Pointer32<LittleEndian>>, - Registers_x86>(((unw_addr_space_i386 *)as)->oas, arg); - break; - case CPU_TYPE_X86_64: - new ((void *)cursor) - UnwindCursor<RemoteAddressSpace<Pointer64<LittleEndian>>, - Registers_x86_64>(((unw_addr_space_x86_64 *)as)->oas, arg); - break; - case CPU_TYPE_POWERPC: - new ((void *)cursor) - UnwindCursor<RemoteAddressSpace<Pointer32<BigEndian>>, - Registers_ppc>(((unw_addr_space_ppc *)as)->oas, arg); - break; - default: - return UNW_EUNSPEC; - } - return UNW_ESUCCESS; -} - - -static bool is64bit(task_t task) { - return false; // FIXME -} - -/// Create an address_space object for use in examining another task. -_LIBUNWIND_EXPORT unw_addr_space_t unw_create_addr_space_for_task(task_t task) { -#if __i386__ - if (is64bit(task)) { - unw_addr_space_x86_64 *as = new unw_addr_space_x86_64(task); - as->taskPort = task; - as->cpuType = CPU_TYPE_X86_64; - //as->oas - } else { - unw_addr_space_i386 *as = new unw_addr_space_i386(task); - as->taskPort = task; - as->cpuType = CPU_TYPE_I386; - //as->oas - } -#else -// FIXME -#endif -} - - -/// Delete an address_space object. -_LIBUNWIND_EXPORT void unw_destroy_addr_space(unw_addr_space_t asp) { - switch (asp->cpuType) { -#if __i386__ || __x86_64__ - case CPU_TYPE_I386: { - unw_addr_space_i386 *as = (unw_addr_space_i386 *)asp; - delete as; - } - break; - case CPU_TYPE_X86_64: { - unw_addr_space_x86_64 *as = (unw_addr_space_x86_64 *)asp; - delete as; - } - break; -#endif - case CPU_TYPE_POWERPC: { - unw_addr_space_ppc *as = (unw_addr_space_ppc *)asp; - delete as; - } - break; - } -} -#endif // UNW_REMOTE - - /// Get value of specified register at cursor position in stack frame. _LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum, unw_word_t *value) { @@ -186,8 +102,20 @@ _LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum, co->setReg(regNum, (pint_t)value); // specical case altering IP to re-find info (being called by personality // function) - if (regNum == UNW_REG_IP) + if (regNum == UNW_REG_IP) { + unw_proc_info_t info; + // First, get the FDE for the old location and then update it. + co->getInfo(&info); co->setInfoBasedOnIPRegister(false); + // If the original call expects stack adjustment, perform this now. + // Normal frame unwinding would have included the offset already in the + // CFA computation. + // Note: for PA-RISC and other platforms where the stack grows up, + // this should actually be - info.gp. LLVM doesn't currently support + // any such platforms and Clang doesn't export a macro for them. + if (info.gp) + co->setReg(UNW_REG_SP, co->getReg(UNW_REG_SP) + info.gp); + } return UNW_ESUCCESS; } return UNW_EBADREG; |