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authorUlrich Drepper <drepper@redhat.com>2009-07-09 23:52:22 -0700
committerUlrich Drepper <drepper@redhat.com>2009-07-09 23:52:22 -0700
commit415ac3df9b10ae426d4f71f9d48003f6a3c7bd8d (patch)
treeffdd1aed425688539db80ff7b9daf6f6ddbcbfff /elf/tst-unique1mod2.c
parentb4f55afd031f14531ba7681032fc5f75a1578320 (diff)
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Implement STB_GNU_UNIQUE handling.
Some symbols have to be identified process-wide by their name. This is particularly important for some C++ features (e.g., class local static data and static variables in inline functions). This cannot completely be implemented with ELF functionality so far. The STB_GNU_UNIQUE binding helps by ensuring the dynamic linker will always use the same definition for all symbols with the same name and this binding.
Diffstat (limited to 'elf/tst-unique1mod2.c')
-rw-r--r--elf/tst-unique1mod2.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/elf/tst-unique1mod2.c b/elf/tst-unique1mod2.c
new file mode 100644
index 0000000..c075515
--- /dev/null
+++ b/elf/tst-unique1mod2.c
@@ -0,0 +1,20 @@
+#include <config.h>
+
+#ifdef HAVE_ASM_UNIQUE_OBJECT
+# define S(s) _S (s)
+# define _S(s) #s
+
+asm (".data;"
+ S (ASM_GLOBAL_DIRECTIVE) " var\n"
+ ".type var, " S (ASM_TYPE_DIRECTIVE_PREFIX) "gnu_unique_object\n"
+ ".size var, 4\n"
+ "var:.zero 4\n"
+ ".previous");
+extern int var;
+
+int
+f (int *p)
+{
+ return &var != p || *p != 1;
+}
+#endif