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Use LIBGCC_S_SO in x86_64 backtrace [committed]

Message ID alpine.DEB.2.20.1801162053260.30181@digraph.polyomino.org.uk
State New
Headers show
Series Use LIBGCC_S_SO in x86_64 backtrace [committed] | expand

Commit Message

Joseph Myers Jan. 16, 2018, 8:53 p.m. UTC 
The x86_64 backtrace implementation is used as a generic
implementation (unwinding via unwind info and _Unwind_Backtrace) by
various other architectures.  This patch makes it more generic by
making it use LIBGCC_S_SO from gnu/lib-names.h instead of hardcoding
the libgcc_s.so.1 name, so that it can also be used on hppa which uses
libgcc_s.so.4.

Tested for x86_64.  Committed.

2018-01-16  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/x86_64/backtrace.c: Include <gnu/lib-names.h>.
	(init): Use LIBGCC_S_SO not hardcoded "libgcc_s.so.1".
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Patch

diff --git a/sysdeps/x86_64/backtrace.c b/sysdeps/x86_64/backtrace.c
index 2706b50..d423cc0 100644
--- a/sysdeps/x86_64/backtrace.c
+++ b/sysdeps/x86_64/backtrace.c
@@ -20,6 +20,7 @@ 
 #include <libc-lock.h>
 #include <dlfcn.h>
 #include <execinfo.h>
+#include <gnu/lib-names.h>
 #include <stdlib.h>
 #include <unwind.h>
 
@@ -49,7 +50,7 @@  dummy_getcfa (struct _Unwind_Context *ctx __attribute__ ((unused)))
 static void
 init (void)
 {
-  libgcc_handle = __libc_dlopen ("libgcc_s.so.1");
+  libgcc_handle = __libc_dlopen (LIBGCC_S_SO);
 
   if (libgcc_handle == NULL)
     return;