diff options
Diffstat (limited to 'contrib/gcc/config/ia64/fde-glibc.c')
| -rw-r--r-- | contrib/gcc/config/ia64/fde-glibc.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/contrib/gcc/config/ia64/fde-glibc.c b/contrib/gcc/config/ia64/fde-glibc.c deleted file mode 100644 index 7506c17c2de3..000000000000 --- a/contrib/gcc/config/ia64/fde-glibc.c +++ /dev/null @@ -1,164 +0,0 @@ -/* Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc. - Contributed by Richard Henderson <rth@cygnus.com>. - - This file is part of GCC. - - GCC is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - GCC 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GCC; see the file COPYING. If not, write to - the Free Software Foundation, 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ - -/* As a special exception, if you link this library with other files, - some of which are compiled with GCC, to produce an executable, - this library does not by itself cause the resulting executable - to be covered by the GNU General Public License. - This exception does not however invalidate any other reasons why - the executable file might be covered by the GNU General Public License. */ - -/* Locate the FDE entry for a given address, using glibc ld.so routines - to avoid register/deregister calls at DSO load/unload. */ - -#ifndef _GNU_SOURCE -#define _GNU_SOURCE 1 -#endif -#include "config.h" -#include <stddef.h> -#include <stdlib.h> -#include <link.h> -#include "unwind-ia64.h" - -#if __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 2) \ - || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && !defined(DT_CONFIG)) -# error You need GLIBC 2.2.4 or later on IA-64 Linux -#endif - -struct unw_ia64_callback_data -{ - Elf64_Addr pc; - unsigned long *segment_base; - unsigned long *gp; - struct unw_table_entry *ret; -}; - -static int -_Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr) -{ - struct unw_ia64_callback_data *data = (struct unw_ia64_callback_data *) ptr; - const Elf64_Phdr *phdr, *p_unwind, *p_dynamic; - long n, match; - Elf64_Addr load_base, seg_base; - struct unw_table_entry *f_base, *f; - size_t lo, hi; - - /* Make sure struct dl_phdr_info is at least as big as we need. */ - if (size < offsetof (struct dl_phdr_info, dlpi_phnum) - + sizeof (info->dlpi_phnum)) - return -1; - - match = 0; - phdr = info->dlpi_phdr; - load_base = info->dlpi_addr; - p_unwind = NULL; - p_dynamic = NULL; - seg_base = ~(Elf64_Addr) 0; - - /* See if PC falls into one of the loaded segments. Find the unwind - segment at the same time. */ - for (n = info->dlpi_phnum; --n >= 0; phdr++) - { - if (phdr->p_type == PT_LOAD) - { - Elf64_Addr vaddr = phdr->p_vaddr + load_base; - if (data->pc >= vaddr && data->pc < vaddr + phdr->p_memsz) - match = 1; - if (vaddr < seg_base) - seg_base = vaddr; - } - else if (phdr->p_type == PT_IA_64_UNWIND) - p_unwind = phdr; - else if (phdr->p_type == PT_DYNAMIC) - p_dynamic = phdr; - } - if (!match || !p_unwind) - return 0; - - /* Search for the FDE within the unwind segment. */ - - f_base = (struct unw_table_entry *) (p_unwind->p_vaddr + load_base); - lo = 0; - hi = p_unwind->p_memsz / sizeof (struct unw_table_entry); - - while (lo < hi) - { - size_t mid = (lo + hi) / 2; - - f = f_base + mid; - if (data->pc < f->start_offset + seg_base) - hi = mid; - else if (data->pc >= f->end_offset + seg_base) - lo = mid + 1; - else - goto found; - } - /* No need to search for further libraries when we know pc is contained - in this library. */ - return 1; - - found: - *data->segment_base = seg_base; - *data->gp = 0; - data->ret = f; - - if (p_dynamic) - { - /* For dynamically linked executables and shared libraries, - DT_PLTGOT is the gp value for that object. */ - Elf64_Dyn *dyn = (Elf64_Dyn *)(p_dynamic->p_vaddr + load_base); - for (; dyn->d_tag != DT_NULL ; dyn++) - if (dyn->d_tag == DT_PLTGOT) - { - /* On IA-64, _DYNAMIC is writable and GLIBC has relocated it. */ - *data->gp = dyn->d_un.d_ptr; - break; - } - } - else - { - /* Otherwise this is a static executable with no _DYNAMIC. - The gp is constant program-wide. */ - register unsigned long gp __asm__("gp"); - *data->gp = gp; - } - - return 1; -} - -/* Return a pointer to the unwind table entry for the function - containing PC. */ - -struct unw_table_entry * -_Unwind_FindTableEntry (void *pc, unsigned long *segment_base, - unsigned long *gp) -{ - struct unw_ia64_callback_data data; - - data.pc = (Elf64_Addr) pc; - data.segment_base = segment_base; - data.gp = gp; - data.ret = NULL; - - if (dl_iterate_phdr (_Unwind_IteratePhdrCallback, &data) < 0) - return NULL; - - return data.ret; -} |