/* Copyright (C) 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <link.h> #include <unwind.h> struct unw_eh_callback_data { _Unwind_Ptr pc; _Unwind_Ptr exidx_start; int exidx_len; }; /* Callback to determins if the PC lies within an object, and remember the location of the exception index table if it does. */ static int find_exidx_callback (struct dl_phdr_info * info, size_t size, void * ptr) { struct unw_eh_callback_data * data; const ElfW(Phdr) *phdr; int i; int match; _Unwind_Ptr load_base; data = (struct unw_eh_callback_data *) ptr; load_base = info->dlpi_addr; phdr = info->dlpi_phdr; match = 0; for (i = info->dlpi_phnum; i > 0; i--, phdr++) { if (phdr->p_type == PT_LOAD) { _Unwind_Ptr vaddr = phdr->p_vaddr + load_base; if (data->pc >= vaddr && data->pc < vaddr + phdr->p_memsz) match = 1; } else if (phdr->p_type == PT_ARM_EXIDX) { data->exidx_start = (_Unwind_Ptr) (phdr->p_vaddr + load_base); data->exidx_len = phdr->p_memsz; } } return match; } /* Find the exception index table containing PC. */ _Unwind_Ptr __gnu_Unwind_Find_exidx (_Unwind_Ptr pc, int * pcount); _Unwind_Ptr __gnu_Unwind_Find_exidx (_Unwind_Ptr pc, int * pcount) { struct unw_eh_callback_data data; data.pc = pc; data.exidx_start = 0; if (dl_iterate_phdr (find_exidx_callback, &data) <= 0) return 0; *pcount = data.exidx_len / 8; return data.exidx_start; }