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authorJan Kratochvil <jan.kratochvil@redhat.com>2013-11-11 18:03:58 +0100
committerJan Kratochvil <jan.kratochvil@redhat.com>2013-11-11 18:03:58 +0100
commit9182aa67994f4e8db378a949812176453e06cb34 (patch)
treed534944d5c888900876148a6c5a394a127ed9346 /elf
parent450a2e2d19bcf668b44778edef55c11d98aad2c6 (diff)
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Fix vDSO l_name for GDB's: Can't read pathname for load map: Input/output error.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-object.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/elf/dl-object.c b/elf/dl-object.c
index 0f594d25e6..26d4f44375 100644
--- a/elf/dl-object.c
+++ b/elf/dl-object.c
@@ -88,7 +88,13 @@ _dl_new_object (char *realname, const char *libname, int type,
   /* newname->next = NULL;	We use calloc therefore not necessary.  */
   newname->dont_free = 1;
 
-  new->l_name = realname;
+  /* When we create the executable link map, or a VDSO link map, we start
+     with "" for the l_name. In these cases "" points to ld.so rodata
+     and won't get dumped during core file generation. Therefore to assist
+     gdb and to create more self-contained core files we adjust l_name to
+     point at the newly allocated copy (which will get dumped) instead of
+     the ld.so rodata copy.  */
+  new->l_name = *realname ? realname : (char *) newname->name + libname_len - 1;
   new->l_type = type;
   /* If we set the bit now since we know it is never used we avoid
      dirtying the cache line later.  */