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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-10-12 16:24:44 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-10-17 12:01:22 -0200
commit4e17c78e4a5da41b3cfefdd49ab760b051b65029 (patch)
tree5edb6ba088bb680dea2f232c369bd1c4d5fb7e3d /sysdeps/x86
parent56a752ab6aa89088a787d852358cdd8f0a0d57f1 (diff)
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Add common ifunc-init.h header
This patch moves the generic definition from x86_64 init-arch
to a common header ifunc-init.h.  No functional changes is expected.

Checked on a x86_64-linux-gnu build.

	* sysdeps/generic/ifunc-init.h: New file.
	* sysdeps/x86/init-arch.h: Use generic ifunc-init.h.
Diffstat (limited to 'sysdeps/x86')
-rw-r--r--sysdeps/x86/init-arch.h41
1 files changed, 1 insertions, 40 deletions
diff --git a/sysdeps/x86/init-arch.h b/sysdeps/x86/init-arch.h
index 15d3f0975d..06a21cc249 100644
--- a/sysdeps/x86/init-arch.h
+++ b/sysdeps/x86/init-arch.h
@@ -20,46 +20,7 @@
 #else
 # include <ldsodefs.h>
 #endif
-
-/* These macros are used to implement ifunc selection in C.  To implement
-   an ifunc function, foo, which returns the address of __foo_sse2 or
-   __foo_avx2:
-
-   #define foo __redirect_foo
-   #define __foo __redirect___foo
-   #include <foo.h>
-   #undef foo
-   #undef __foo
-   #define SYMBOL_NAME foo
-   #include <init-arch.h>
-
-   extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
-   extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
-
-   static inline void *
-   foo_selector (void)
-   {
-     if (use AVX2)
-      return OPTIMIZE (avx2);
-
-     return OPTIMIZE (sse2);
-   }
-
-   libc_ifunc_redirected (__redirect_foo, foo, foo_selector ());
-
-*/
-
-#define PASTER1(x,y)	x##_##y
-#define EVALUATOR1(x,y)	PASTER1 (x,y)
-#define PASTER2(x,y)	__##x##_##y
-#define EVALUATOR2(x,y)	PASTER2 (x,y)
-
-/* Basically set '__redirect_<symbol>' to use as type definition,
-   '__<symbol>_<variant>' as the optimized implementation and
-   '<symbol>_ifunc_selector' as the IFUNC selector.  */
-#define REDIRECT_NAME	EVALUATOR1 (__redirect, SYMBOL_NAME)
-#define OPTIMIZE(name)	EVALUATOR2 (SYMBOL_NAME, name)
-#define IFUNC_SELECTOR	EVALUATOR1 (SYMBOL_NAME, ifunc_selector)
+#include <ifunc-init.h>
 
 #ifndef __x86_64__
 /* Due to the reordering and the other nifty extensions in i686, it is