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/* Determine the virtual memory area of a given address. Linux version.
Copyright (C) 2002, 2006, 2008 Bruno Haible <bruno@clisp.org>
This program 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.
This program 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 this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "stackvma.h"
#include <stdio.h>
#include "stackvma-simple.c"
#include "stackvma-rofile.c"
#if HAVE_MINCORE
# define sigsegv_get_vma mincore_get_vma
# define STATIC static
# include "stackvma-mincore.c"
# undef sigsegv_get_vma
#endif
int
sigsegv_get_vma (unsigned long address, struct vma_struct *vma)
{
struct rofile rof;
int c;
unsigned long start, end;
#if STACK_DIRECTION < 0
unsigned long prev;
#endif
/* Open the current process' maps file. It describes one VMA per line. */
if (rof_open (&rof, "/proc/self/maps") < 0)
goto failed;
#if STACK_DIRECTION < 0
prev = 0;
#endif
for (;;)
{
if (!(rof_scanf_lx (&rof, &start) >= 0
&& rof_getchar (&rof) == '-'
&& rof_scanf_lx (&rof, &end) >= 0))
break;
while (c = rof_getchar (&rof), c != -1 && c != '\n')
continue;
if (address >= start && address <= end - 1)
{
vma->start = start;
vma->end = end;
#if STACK_DIRECTION < 0
vma->prev_end = prev;
#else
if (!(rof_scanf_lx (&rof, &vma->next_start) >= 0
&& rof_getchar (&rof) == '-'
&& rof_scanf_lx (&rof, &end) >= 0))
vma->next_start = 0;
#endif
rof_close (&rof);
vma->is_near_this = simple_is_near_this;
return 0;
}
#if STACK_DIRECTION < 0
prev = end;
#endif
}
rof_close (&rof);
failed:
#if HAVE_MINCORE
return mincore_get_vma (address, vma);
#else
return -1;
#endif
}
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