1 files changed, 83 insertions, 0 deletions
diff --git a/libsigsegv/src/stackvma-linux.c b/libsigsegv/src/stackvma-linux.c
new file mode 100644
index 00000000..33842287
--- /dev/null
+++ b/libsigsegv/src/stackvma-linux.c
@@ -0,0 +1,83 @@
+/* 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
+}