/* Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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/* Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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Contributed by Jakub Jelinek <jakub@redhat.com>.
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Contributed by Jakub Jelinek <jakub@redhat.com>.
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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any later version.
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|
|
GCC is distributed in the hope that it will be useful,
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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Boston, MA 02110-1301, USA. */
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/* As a special exception, if you link this library with other files,
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/* As a special exception, if you link this library with other files,
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some of which are compiled with GCC, to produce an executable,
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some of which are compiled with GCC, to produce an executable,
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this library does not by itself cause the resulting executable
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this library does not by itself cause the resulting executable
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to be covered by the GNU General Public License.
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to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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the executable file might be covered by the GNU General Public License. */
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|
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/* Locate the FDE entry for a given address, using PT_GNU_EH_FRAME ELF
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/* Locate the FDE entry for a given address, using PT_GNU_EH_FRAME ELF
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segment and dl_iterate_phdr to avoid register/deregister calls at
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segment and dl_iterate_phdr to avoid register/deregister calls at
|
DSO load/unload. */
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DSO load/unload. */
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|
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#ifndef _GNU_SOURCE
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#define _GNU_SOURCE 1
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#endif
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#endif
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|
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#include "tconfig.h"
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#include "tconfig.h"
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#include "tsystem.h"
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#include "tsystem.h"
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#ifndef inhibit_libc
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#ifndef inhibit_libc
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#include <link.h>
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#include <link.h>
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#endif
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#endif
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#include "coretypes.h"
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#include "coretypes.h"
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#include "tm.h"
|
#include "tm.h"
|
#include "dwarf2.h"
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#include "dwarf2.h"
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#include "unwind.h"
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#include "unwind.h"
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#define NO_BASE_OF_ENCODED_VALUE
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#define NO_BASE_OF_ENCODED_VALUE
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#include "unwind-pe.h"
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#include "unwind-pe.h"
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#include "unwind-dw2-fde.h"
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#include "unwind-dw2-fde.h"
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#include "unwind-compat.h"
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#include "unwind-compat.h"
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#include "gthr.h"
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#include "gthr.h"
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|
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#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
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#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
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&& (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
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&& (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
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|| (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
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|| (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
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|
|
#ifndef __RELOC_POINTER
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#ifndef __RELOC_POINTER
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# define __RELOC_POINTER(ptr, base) ((ptr) + (base))
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# define __RELOC_POINTER(ptr, base) ((ptr) + (base))
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#endif
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#endif
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|
|
static const fde * _Unwind_Find_registered_FDE (void *pc, struct dwarf_eh_bases *bases);
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static const fde * _Unwind_Find_registered_FDE (void *pc, struct dwarf_eh_bases *bases);
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|
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#define _Unwind_Find_FDE _Unwind_Find_registered_FDE
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#define _Unwind_Find_FDE _Unwind_Find_registered_FDE
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#include "unwind-dw2-fde.c"
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#include "unwind-dw2-fde.c"
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#undef _Unwind_Find_FDE
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#undef _Unwind_Find_FDE
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|
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#ifndef PT_GNU_EH_FRAME
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#ifndef PT_GNU_EH_FRAME
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#define PT_GNU_EH_FRAME (PT_LOOS + 0x474e550)
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#define PT_GNU_EH_FRAME (PT_LOOS + 0x474e550)
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#endif
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#endif
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|
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struct unw_eh_callback_data
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struct unw_eh_callback_data
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{
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{
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_Unwind_Ptr pc;
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_Unwind_Ptr pc;
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void *tbase;
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void *tbase;
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void *dbase;
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void *dbase;
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void *func;
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void *func;
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const fde *ret;
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const fde *ret;
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int check_cache;
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int check_cache;
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};
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};
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|
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struct unw_eh_frame_hdr
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struct unw_eh_frame_hdr
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{
|
{
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unsigned char version;
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unsigned char version;
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unsigned char eh_frame_ptr_enc;
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unsigned char eh_frame_ptr_enc;
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unsigned char fde_count_enc;
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unsigned char fde_count_enc;
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unsigned char table_enc;
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unsigned char table_enc;
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};
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};
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|
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#define FRAME_HDR_CACHE_SIZE 8
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#define FRAME_HDR_CACHE_SIZE 8
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|
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static struct frame_hdr_cache_element
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static struct frame_hdr_cache_element
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{
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{
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_Unwind_Ptr pc_low;
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_Unwind_Ptr pc_low;
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_Unwind_Ptr pc_high;
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_Unwind_Ptr pc_high;
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_Unwind_Ptr load_base;
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_Unwind_Ptr load_base;
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const ElfW(Phdr) *p_eh_frame_hdr;
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const ElfW(Phdr) *p_eh_frame_hdr;
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const ElfW(Phdr) *p_dynamic;
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const ElfW(Phdr) *p_dynamic;
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struct frame_hdr_cache_element *link;
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struct frame_hdr_cache_element *link;
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} frame_hdr_cache[FRAME_HDR_CACHE_SIZE];
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} frame_hdr_cache[FRAME_HDR_CACHE_SIZE];
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|
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static struct frame_hdr_cache_element *frame_hdr_cache_head;
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static struct frame_hdr_cache_element *frame_hdr_cache_head;
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|
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/* Like base_of_encoded_value, but take the base from a struct
|
/* Like base_of_encoded_value, but take the base from a struct
|
unw_eh_callback_data instead of an _Unwind_Context. */
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unw_eh_callback_data instead of an _Unwind_Context. */
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|
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static _Unwind_Ptr
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static _Unwind_Ptr
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base_from_cb_data (unsigned char encoding, struct unw_eh_callback_data *data)
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base_from_cb_data (unsigned char encoding, struct unw_eh_callback_data *data)
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{
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{
|
if (encoding == DW_EH_PE_omit)
|
if (encoding == DW_EH_PE_omit)
|
return 0;
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return 0;
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|
|
switch (encoding & 0x70)
|
switch (encoding & 0x70)
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{
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{
|
case DW_EH_PE_absptr:
|
case DW_EH_PE_absptr:
|
case DW_EH_PE_pcrel:
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case DW_EH_PE_pcrel:
|
case DW_EH_PE_aligned:
|
case DW_EH_PE_aligned:
|
return 0;
|
return 0;
|
|
|
case DW_EH_PE_textrel:
|
case DW_EH_PE_textrel:
|
return (_Unwind_Ptr) data->tbase;
|
return (_Unwind_Ptr) data->tbase;
|
case DW_EH_PE_datarel:
|
case DW_EH_PE_datarel:
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return (_Unwind_Ptr) data->dbase;
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return (_Unwind_Ptr) data->dbase;
|
default:
|
default:
|
gcc_unreachable ();
|
gcc_unreachable ();
|
}
|
}
|
}
|
}
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|
|
static int
|
static int
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_Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr)
|
_Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr)
|
{
|
{
|
struct unw_eh_callback_data *data = (struct unw_eh_callback_data *) ptr;
|
struct unw_eh_callback_data *data = (struct unw_eh_callback_data *) ptr;
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const ElfW(Phdr) *phdr, *p_eh_frame_hdr, *p_dynamic;
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const ElfW(Phdr) *phdr, *p_eh_frame_hdr, *p_dynamic;
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long n, match;
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long n, match;
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#ifdef __FRV_FDPIC__
|
#ifdef __FRV_FDPIC__
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struct elf32_fdpic_loadaddr load_base;
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struct elf32_fdpic_loadaddr load_base;
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#else
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#else
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_Unwind_Ptr load_base;
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_Unwind_Ptr load_base;
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#endif
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#endif
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const unsigned char *p;
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const unsigned char *p;
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const struct unw_eh_frame_hdr *hdr;
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const struct unw_eh_frame_hdr *hdr;
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_Unwind_Ptr eh_frame;
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_Unwind_Ptr eh_frame;
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struct object ob;
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struct object ob;
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|
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struct ext_dl_phdr_info
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struct ext_dl_phdr_info
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{
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{
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ElfW(Addr) dlpi_addr;
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ElfW(Addr) dlpi_addr;
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const char *dlpi_name;
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const char *dlpi_name;
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const ElfW(Phdr) *dlpi_phdr;
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const ElfW(Phdr) *dlpi_phdr;
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ElfW(Half) dlpi_phnum;
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ElfW(Half) dlpi_phnum;
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unsigned long long int dlpi_adds;
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unsigned long long int dlpi_adds;
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unsigned long long int dlpi_subs;
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unsigned long long int dlpi_subs;
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};
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};
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|
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match = 0;
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match = 0;
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phdr = info->dlpi_phdr;
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phdr = info->dlpi_phdr;
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load_base = info->dlpi_addr;
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load_base = info->dlpi_addr;
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p_eh_frame_hdr = NULL;
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p_eh_frame_hdr = NULL;
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p_dynamic = NULL;
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p_dynamic = NULL;
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|
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struct frame_hdr_cache_element *prev_cache_entry = NULL,
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struct frame_hdr_cache_element *prev_cache_entry = NULL,
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*last_cache_entry = NULL;
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*last_cache_entry = NULL;
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|
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if (data->check_cache && size >= sizeof (struct ext_dl_phdr_info))
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if (data->check_cache && size >= sizeof (struct ext_dl_phdr_info))
|
{
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{
|
static unsigned long long adds = -1ULL, subs;
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static unsigned long long adds = -1ULL, subs;
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struct ext_dl_phdr_info *einfo = (struct ext_dl_phdr_info *) info;
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struct ext_dl_phdr_info *einfo = (struct ext_dl_phdr_info *) info;
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|
|
/* We use a least recently used cache replacement policy. Also,
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/* We use a least recently used cache replacement policy. Also,
|
the most recently used cache entries are placed at the head
|
the most recently used cache entries are placed at the head
|
of the search chain. */
|
of the search chain. */
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|
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if (einfo->dlpi_adds == adds && einfo->dlpi_subs == subs)
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if (einfo->dlpi_adds == adds && einfo->dlpi_subs == subs)
|
{
|
{
|
/* Find data->pc in shared library cache.
|
/* Find data->pc in shared library cache.
|
Set load_base, p_eh_frame_hdr and p_dynamic
|
Set load_base, p_eh_frame_hdr and p_dynamic
|
plus match from the cache and goto
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plus match from the cache and goto
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"Read .eh_frame_hdr header." below. */
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"Read .eh_frame_hdr header." below. */
|
|
|
struct frame_hdr_cache_element *cache_entry;
|
struct frame_hdr_cache_element *cache_entry;
|
|
|
for (cache_entry = frame_hdr_cache_head;
|
for (cache_entry = frame_hdr_cache_head;
|
cache_entry;
|
cache_entry;
|
cache_entry = cache_entry->link)
|
cache_entry = cache_entry->link)
|
{
|
{
|
if (data->pc >= cache_entry->pc_low
|
if (data->pc >= cache_entry->pc_low
|
&& data->pc < cache_entry->pc_high)
|
&& data->pc < cache_entry->pc_high)
|
{
|
{
|
load_base = cache_entry->load_base;
|
load_base = cache_entry->load_base;
|
p_eh_frame_hdr = cache_entry->p_eh_frame_hdr;
|
p_eh_frame_hdr = cache_entry->p_eh_frame_hdr;
|
p_dynamic = cache_entry->p_dynamic;
|
p_dynamic = cache_entry->p_dynamic;
|
|
|
/* And move the entry we're using to the head. */
|
/* And move the entry we're using to the head. */
|
if (cache_entry != frame_hdr_cache_head)
|
if (cache_entry != frame_hdr_cache_head)
|
{
|
{
|
prev_cache_entry->link = cache_entry->link;
|
prev_cache_entry->link = cache_entry->link;
|
cache_entry->link = frame_hdr_cache_head;
|
cache_entry->link = frame_hdr_cache_head;
|
frame_hdr_cache_head = cache_entry;
|
frame_hdr_cache_head = cache_entry;
|
}
|
}
|
goto found;
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goto found;
|
}
|
}
|
|
|
last_cache_entry = cache_entry;
|
last_cache_entry = cache_entry;
|
/* Exit early if we found an unused entry. */
|
/* Exit early if we found an unused entry. */
|
if ((cache_entry->pc_low | cache_entry->pc_high) == 0)
|
if ((cache_entry->pc_low | cache_entry->pc_high) == 0)
|
break;
|
break;
|
if (cache_entry->link != NULL)
|
if (cache_entry->link != NULL)
|
prev_cache_entry = cache_entry;
|
prev_cache_entry = cache_entry;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
adds = einfo->dlpi_adds;
|
adds = einfo->dlpi_adds;
|
subs = einfo->dlpi_subs;
|
subs = einfo->dlpi_subs;
|
/* Initialize the cache. Create a chain of cache entries,
|
/* Initialize the cache. Create a chain of cache entries,
|
with the final one terminated by a NULL link. */
|
with the final one terminated by a NULL link. */
|
int i;
|
int i;
|
for (i = 0; i < FRAME_HDR_CACHE_SIZE; i++)
|
for (i = 0; i < FRAME_HDR_CACHE_SIZE; i++)
|
{
|
{
|
frame_hdr_cache[i].pc_low = 0;
|
frame_hdr_cache[i].pc_low = 0;
|
frame_hdr_cache[i].pc_high = 0;
|
frame_hdr_cache[i].pc_high = 0;
|
frame_hdr_cache[i].link = &frame_hdr_cache[i+1];
|
frame_hdr_cache[i].link = &frame_hdr_cache[i+1];
|
}
|
}
|
frame_hdr_cache[i-1].link = NULL;
|
frame_hdr_cache[i-1].link = NULL;
|
frame_hdr_cache_head = &frame_hdr_cache[0];
|
frame_hdr_cache_head = &frame_hdr_cache[0];
|
data->check_cache = 0;
|
data->check_cache = 0;
|
}
|
}
|
}
|
}
|
|
|
/* Make sure struct dl_phdr_info is at least as big as we need. */
|
/* Make sure struct dl_phdr_info is at least as big as we need. */
|
if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
|
if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
|
+ sizeof (info->dlpi_phnum))
|
+ sizeof (info->dlpi_phnum))
|
return -1;
|
return -1;
|
|
|
_Unwind_Ptr pc_low = 0, pc_high = 0;
|
_Unwind_Ptr pc_low = 0, pc_high = 0;
|
|
|
/* See if PC falls into one of the loaded segments. Find the eh_frame
|
/* See if PC falls into one of the loaded segments. Find the eh_frame
|
segment at the same time. */
|
segment at the same time. */
|
for (n = info->dlpi_phnum; --n >= 0; phdr++)
|
for (n = info->dlpi_phnum; --n >= 0; phdr++)
|
{
|
{
|
if (phdr->p_type == PT_LOAD)
|
if (phdr->p_type == PT_LOAD)
|
{
|
{
|
_Unwind_Ptr vaddr = (_Unwind_Ptr)
|
_Unwind_Ptr vaddr = (_Unwind_Ptr)
|
__RELOC_POINTER (phdr->p_vaddr, load_base);
|
__RELOC_POINTER (phdr->p_vaddr, load_base);
|
if (data->pc >= vaddr && data->pc < vaddr + phdr->p_memsz)
|
if (data->pc >= vaddr && data->pc < vaddr + phdr->p_memsz)
|
{
|
{
|
match = 1;
|
match = 1;
|
pc_low = vaddr;
|
pc_low = vaddr;
|
pc_high = vaddr + phdr->p_memsz;
|
pc_high = vaddr + phdr->p_memsz;
|
}
|
}
|
}
|
}
|
else if (phdr->p_type == PT_GNU_EH_FRAME)
|
else if (phdr->p_type == PT_GNU_EH_FRAME)
|
p_eh_frame_hdr = phdr;
|
p_eh_frame_hdr = phdr;
|
else if (phdr->p_type == PT_DYNAMIC)
|
else if (phdr->p_type == PT_DYNAMIC)
|
p_dynamic = phdr;
|
p_dynamic = phdr;
|
}
|
}
|
|
|
if (!match)
|
if (!match)
|
return 0;
|
return 0;
|
|
|
if (size >= sizeof (struct ext_dl_phdr_info))
|
if (size >= sizeof (struct ext_dl_phdr_info))
|
{
|
{
|
/* Move the cache entry we're about to overwrite to the head of
|
/* Move the cache entry we're about to overwrite to the head of
|
the list. If either last_cache_entry or prev_cache_entry are
|
the list. If either last_cache_entry or prev_cache_entry are
|
NULL, that cache entry is already at the head. */
|
NULL, that cache entry is already at the head. */
|
if (last_cache_entry != NULL && prev_cache_entry != NULL)
|
if (last_cache_entry != NULL && prev_cache_entry != NULL)
|
{
|
{
|
prev_cache_entry->link = last_cache_entry->link;
|
prev_cache_entry->link = last_cache_entry->link;
|
last_cache_entry->link = frame_hdr_cache_head;
|
last_cache_entry->link = frame_hdr_cache_head;
|
frame_hdr_cache_head = last_cache_entry;
|
frame_hdr_cache_head = last_cache_entry;
|
}
|
}
|
|
|
frame_hdr_cache_head->load_base = load_base;
|
frame_hdr_cache_head->load_base = load_base;
|
frame_hdr_cache_head->p_eh_frame_hdr = p_eh_frame_hdr;
|
frame_hdr_cache_head->p_eh_frame_hdr = p_eh_frame_hdr;
|
frame_hdr_cache_head->p_dynamic = p_dynamic;
|
frame_hdr_cache_head->p_dynamic = p_dynamic;
|
frame_hdr_cache_head->pc_low = pc_low;
|
frame_hdr_cache_head->pc_low = pc_low;
|
frame_hdr_cache_head->pc_high = pc_high;
|
frame_hdr_cache_head->pc_high = pc_high;
|
}
|
}
|
|
|
found:
|
found:
|
|
|
if (!p_eh_frame_hdr)
|
if (!p_eh_frame_hdr)
|
return 0;
|
return 0;
|
|
|
/* Read .eh_frame_hdr header. */
|
/* Read .eh_frame_hdr header. */
|
hdr = (const struct unw_eh_frame_hdr *)
|
hdr = (const struct unw_eh_frame_hdr *)
|
__RELOC_POINTER (p_eh_frame_hdr->p_vaddr, load_base);
|
__RELOC_POINTER (p_eh_frame_hdr->p_vaddr, load_base);
|
if (hdr->version != 1)
|
if (hdr->version != 1)
|
return 1;
|
return 1;
|
|
|
#ifdef CRT_GET_RFIB_DATA
|
#ifdef CRT_GET_RFIB_DATA
|
# ifdef __i386__
|
# ifdef __i386__
|
data->dbase = NULL;
|
data->dbase = NULL;
|
if (p_dynamic)
|
if (p_dynamic)
|
{
|
{
|
/* For dynamically linked executables and shared libraries,
|
/* For dynamically linked executables and shared libraries,
|
DT_PLTGOT is the gp value for that object. */
|
DT_PLTGOT is the gp value for that object. */
|
ElfW(Dyn) *dyn = (ElfW(Dyn) *)
|
ElfW(Dyn) *dyn = (ElfW(Dyn) *)
|
__RELOC_POINTER (p_dynamic->p_vaddr, load_base);
|
__RELOC_POINTER (p_dynamic->p_vaddr, load_base);
|
for (; dyn->d_tag != DT_NULL ; dyn++)
|
for (; dyn->d_tag != DT_NULL ; dyn++)
|
if (dyn->d_tag == DT_PLTGOT)
|
if (dyn->d_tag == DT_PLTGOT)
|
{
|
{
|
/* On IA-32, _DYNAMIC is writable and GLIBC has relocated it. */
|
/* On IA-32, _DYNAMIC is writable and GLIBC has relocated it. */
|
data->dbase = (void *) dyn->d_un.d_ptr;
|
data->dbase = (void *) dyn->d_un.d_ptr;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
# elif defined __FRV_FDPIC__ && defined __linux__
|
# elif defined __FRV_FDPIC__ && defined __linux__
|
data->dbase = load_base.got_value;
|
data->dbase = load_base.got_value;
|
# else
|
# else
|
# error What is DW_EH_PE_datarel base on this platform?
|
# error What is DW_EH_PE_datarel base on this platform?
|
# endif
|
# endif
|
#endif
|
#endif
|
|
|
p = read_encoded_value_with_base (hdr->eh_frame_ptr_enc,
|
p = read_encoded_value_with_base (hdr->eh_frame_ptr_enc,
|
base_from_cb_data (hdr->eh_frame_ptr_enc,
|
base_from_cb_data (hdr->eh_frame_ptr_enc,
|
data),
|
data),
|
(const unsigned char *) (hdr + 1),
|
(const unsigned char *) (hdr + 1),
|
&eh_frame);
|
&eh_frame);
|
|
|
/* We require here specific table encoding to speed things up.
|
/* We require here specific table encoding to speed things up.
|
Also, DW_EH_PE_datarel here means using PT_GNU_EH_FRAME start
|
Also, DW_EH_PE_datarel here means using PT_GNU_EH_FRAME start
|
as base, not the processor specific DW_EH_PE_datarel. */
|
as base, not the processor specific DW_EH_PE_datarel. */
|
if (hdr->fde_count_enc != DW_EH_PE_omit
|
if (hdr->fde_count_enc != DW_EH_PE_omit
|
&& hdr->table_enc == (DW_EH_PE_datarel | DW_EH_PE_sdata4))
|
&& hdr->table_enc == (DW_EH_PE_datarel | DW_EH_PE_sdata4))
|
{
|
{
|
_Unwind_Ptr fde_count;
|
_Unwind_Ptr fde_count;
|
|
|
p = read_encoded_value_with_base (hdr->fde_count_enc,
|
p = read_encoded_value_with_base (hdr->fde_count_enc,
|
base_from_cb_data (hdr->fde_count_enc,
|
base_from_cb_data (hdr->fde_count_enc,
|
data),
|
data),
|
p, &fde_count);
|
p, &fde_count);
|
/* Shouldn't happen. */
|
/* Shouldn't happen. */
|
if (fde_count == 0)
|
if (fde_count == 0)
|
return 1;
|
return 1;
|
if ((((_Unwind_Ptr) p) & 3) == 0)
|
if ((((_Unwind_Ptr) p) & 3) == 0)
|
{
|
{
|
struct fde_table {
|
struct fde_table {
|
signed initial_loc __attribute__ ((mode (SI)));
|
signed initial_loc __attribute__ ((mode (SI)));
|
signed fde __attribute__ ((mode (SI)));
|
signed fde __attribute__ ((mode (SI)));
|
};
|
};
|
const struct fde_table *table = (const struct fde_table *) p;
|
const struct fde_table *table = (const struct fde_table *) p;
|
size_t lo, hi, mid;
|
size_t lo, hi, mid;
|
_Unwind_Ptr data_base = (_Unwind_Ptr) hdr;
|
_Unwind_Ptr data_base = (_Unwind_Ptr) hdr;
|
fde *f;
|
fde *f;
|
unsigned int f_enc, f_enc_size;
|
unsigned int f_enc, f_enc_size;
|
_Unwind_Ptr range;
|
_Unwind_Ptr range;
|
|
|
mid = fde_count - 1;
|
mid = fde_count - 1;
|
if (data->pc < table[0].initial_loc + data_base)
|
if (data->pc < table[0].initial_loc + data_base)
|
return 1;
|
return 1;
|
else if (data->pc < table[mid].initial_loc + data_base)
|
else if (data->pc < table[mid].initial_loc + data_base)
|
{
|
{
|
lo = 0;
|
lo = 0;
|
hi = mid;
|
hi = mid;
|
|
|
while (lo < hi)
|
while (lo < hi)
|
{
|
{
|
mid = (lo + hi) / 2;
|
mid = (lo + hi) / 2;
|
if (data->pc < table[mid].initial_loc + data_base)
|
if (data->pc < table[mid].initial_loc + data_base)
|
hi = mid;
|
hi = mid;
|
else if (data->pc >= table[mid + 1].initial_loc + data_base)
|
else if (data->pc >= table[mid + 1].initial_loc + data_base)
|
lo = mid + 1;
|
lo = mid + 1;
|
else
|
else
|
break;
|
break;
|
}
|
}
|
|
|
gcc_assert (lo < hi);
|
gcc_assert (lo < hi);
|
}
|
}
|
|
|
f = (fde *) (table[mid].fde + data_base);
|
f = (fde *) (table[mid].fde + data_base);
|
f_enc = get_fde_encoding (f);
|
f_enc = get_fde_encoding (f);
|
f_enc_size = size_of_encoded_value (f_enc);
|
f_enc_size = size_of_encoded_value (f_enc);
|
read_encoded_value_with_base (f_enc & 0x0f, 0,
|
read_encoded_value_with_base (f_enc & 0x0f, 0,
|
&f->pc_begin[f_enc_size], &range);
|
&f->pc_begin[f_enc_size], &range);
|
if (data->pc < table[mid].initial_loc + data_base + range)
|
if (data->pc < table[mid].initial_loc + data_base + range)
|
data->ret = f;
|
data->ret = f;
|
data->func = (void *) (table[mid].initial_loc + data_base);
|
data->func = (void *) (table[mid].initial_loc + data_base);
|
return 1;
|
return 1;
|
}
|
}
|
}
|
}
|
|
|
/* We have no sorted search table, so need to go the slow way.
|
/* We have no sorted search table, so need to go the slow way.
|
As soon as GLIBC will provide API so to notify that a library has been
|
As soon as GLIBC will provide API so to notify that a library has been
|
removed, we could cache this (and thus use search_object). */
|
removed, we could cache this (and thus use search_object). */
|
ob.pc_begin = NULL;
|
ob.pc_begin = NULL;
|
ob.tbase = data->tbase;
|
ob.tbase = data->tbase;
|
ob.dbase = data->dbase;
|
ob.dbase = data->dbase;
|
ob.u.single = (fde *) eh_frame;
|
ob.u.single = (fde *) eh_frame;
|
ob.s.i = 0;
|
ob.s.i = 0;
|
ob.s.b.mixed_encoding = 1; /* Need to assume worst case. */
|
ob.s.b.mixed_encoding = 1; /* Need to assume worst case. */
|
data->ret = linear_search_fdes (&ob, (fde *) eh_frame, (void *) data->pc);
|
data->ret = linear_search_fdes (&ob, (fde *) eh_frame, (void *) data->pc);
|
if (data->ret != NULL)
|
if (data->ret != NULL)
|
{
|
{
|
_Unwind_Ptr func;
|
_Unwind_Ptr func;
|
unsigned int encoding = get_fde_encoding (data->ret);
|
unsigned int encoding = get_fde_encoding (data->ret);
|
|
|
read_encoded_value_with_base (encoding,
|
read_encoded_value_with_base (encoding,
|
base_from_cb_data (encoding, data),
|
base_from_cb_data (encoding, data),
|
data->ret->pc_begin, &func);
|
data->ret->pc_begin, &func);
|
data->func = (void *) func;
|
data->func = (void *) func;
|
}
|
}
|
return 1;
|
return 1;
|
}
|
}
|
|
|
const fde *
|
const fde *
|
_Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
|
_Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
|
{
|
{
|
struct unw_eh_callback_data data;
|
struct unw_eh_callback_data data;
|
const fde *ret;
|
const fde *ret;
|
|
|
ret = _Unwind_Find_registered_FDE (pc, bases);
|
ret = _Unwind_Find_registered_FDE (pc, bases);
|
if (ret != NULL)
|
if (ret != NULL)
|
return ret;
|
return ret;
|
|
|
data.pc = (_Unwind_Ptr) pc;
|
data.pc = (_Unwind_Ptr) pc;
|
data.tbase = NULL;
|
data.tbase = NULL;
|
data.dbase = NULL;
|
data.dbase = NULL;
|
data.func = NULL;
|
data.func = NULL;
|
data.ret = NULL;
|
data.ret = NULL;
|
data.check_cache = 1;
|
data.check_cache = 1;
|
|
|
if (dl_iterate_phdr (_Unwind_IteratePhdrCallback, &data) < 0)
|
if (dl_iterate_phdr (_Unwind_IteratePhdrCallback, &data) < 0)
|
return NULL;
|
return NULL;
|
|
|
if (data.ret)
|
if (data.ret)
|
{
|
{
|
bases->tbase = data.tbase;
|
bases->tbase = data.tbase;
|
bases->dbase = data.dbase;
|
bases->dbase = data.dbase;
|
bases->func = data.func;
|
bases->func = data.func;
|
}
|
}
|
return data.ret;
|
return data.ret;
|
}
|
}
|
|
|
#else
|
#else
|
/* Prevent multiple include of header files. */
|
/* Prevent multiple include of header files. */
|
#define _Unwind_Find_FDE _Unwind_Find_FDE
|
#define _Unwind_Find_FDE _Unwind_Find_FDE
|
#include "unwind-dw2-fde.c"
|
#include "unwind-dw2-fde.c"
|
#endif
|
#endif
|
|
|
#if defined (USE_GAS_SYMVER) && defined (SHARED) && defined (USE_LIBUNWIND_EXCEPTIONS)
|
#if defined (USE_GAS_SYMVER) && defined (SHARED) && defined (USE_LIBUNWIND_EXCEPTIONS)
|
alias (_Unwind_Find_FDE);
|
alias (_Unwind_Find_FDE);
|
#endif
|
#endif
|
|
|
