[PATCH] bfd: Handle bmmap failure in _bfd_mmap_read_temporary

["H.J. Lu" <hjl.tools@gmail.com>]

bmmap may return MAP_FAILED.  _bfd_mmap_readonly_temporary returns
MAP_FAILED when called from GDB on an object with opncls_iovec.  Update
_bfd_mmap_read_temporary to handle bmmap failure.

	* libbfd.c (_bfd_mmap_read_temporary): Handle bmmap failure.
---
 bfd/libbfd.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/bfd/libbfd.c b/bfd/libbfd.c
index 869f0ed5c66..34197b75b5e 100644
--- a/bfd/libbfd.c
+++ b/bfd/libbfd.c
@@ -1207,7 +1207,11 @@ _bfd_mmap_read_temporary (void **data_p, size_t *size_p,
     {
       data = _bfd_mmap_readonly_temporary (abfd, size, mmap_base,
 					   size_p);
-      if (data == NULL || data == MAP_FAILED)
+      /* MAP_FAILED is returned when called from GDB on an object with
+	 opncls_iovec.  Use bfd_read in this case.  */
+      if (data == MAP_FAILED)
+	goto mmap_failed;
+      if (data == NULL)
 	abort ();
       *data_p = data;
       return true;
@@ -1216,6 +1220,7 @@ _bfd_mmap_read_temporary (void **data_p, size_t *size_p,
 
   if (data == NULL)
     {
+mmap_failed:
       data = bfd_malloc (size);
       if (data == NULL)
 	return false;
-- 
2.44.0