x86-64: Use IFUNC memcpy and mempcpy in libc.a

Since apply_irel is called before memcpy and mempcpy are called, we can use IFUNC memcpy and mempcpy in libc.a. * sysdeps/x86_64/memmove.S (MEMCPY_SYMBOL): Don't check SHARED. (MEMPCPY_SYMBOL): Likewise. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Test memcpy and mempcpy in libc.a. * sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: Also include in libc.a. * sysdeps/x86_64/multiarch/memcpy-ssse3.S: Likewise. * sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S: Likewise. * sysdeps/x86_64/multiarch/memcpy.c: Also include in libc.a. (__hidden_ver1): Don't use in libc.a. * sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S (__mempcpy): Don't create a weak alias in libc.a. * sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S: Support libc.a. * sysdeps/x86_64/multiarch/mempcpy.c: Also include in libc.a. (__hidden_ver1): Don't use in libc.a.
2025-10-30 10:45:40 +03:00 · 2017-08-04 12:27:00 -07:00
parent 19f1a11e7e
commit fc11ff8d0a
10 changed files with 44 additions and 38 deletions
--- a/20
+++ b/20
@@ -1,3 +1,23 @@
+2017-08-04  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* sysdeps/x86_64/memmove.S (MEMCPY_SYMBOL): Don't check SHARED.
+	(MEMPCPY_SYMBOL): Likewise.
+	* sysdeps/x86_64/multiarch/ifunc-impl-list.c
+	(__libc_ifunc_impl_list): Test memcpy and mempcpy in libc.a.
+	* sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: Also include
+	in libc.a.
+	* sysdeps/x86_64/multiarch/memcpy-ssse3.S: Likewise.
+	* sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S:
+	Likewise.
+	* sysdeps/x86_64/multiarch/memcpy.c: Also include in libc.a.
+	(__hidden_ver1): Don't use in libc.a.
+	* sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S
+	(__mempcpy): Don't create a weak alias in libc.a.
+	* sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S: Support
+	libc.a.
+	* sysdeps/x86_64/multiarch/mempcpy.c: Also include in libc.a.
+	(__hidden_ver1): Don't use in libc.a.
+
 2017-08-04  H.J. Lu  <hongjiu.lu@intel.com>

 	* config.make.in (have-insert): New.
--- a/sysdeps/x86_64/memmove.S
+++ b/sysdeps/x86_64/memmove.S
@@ -29,7 +29,7 @@
 #define SECTION(p)		p

 #ifdef USE_MULTIARCH
-# if !defined SHARED || !IS_IN (libc)
+# if !IS_IN (libc)
 #  define MEMCPY_SYMBOL(p,s)		memcpy
 # endif
 #else
@@ -39,7 +39,7 @@
 #  define MEMCPY_SYMBOL(p,s)		memcpy
 # endif
 #endif
-#if !defined SHARED || !defined USE_MULTIARCH || !IS_IN (libc)
+#if !defined USE_MULTIARCH || !IS_IN (libc)
 # define MEMPCPY_SYMBOL(p,s)		__mempcpy
 #endif
 #ifndef MEMMOVE_SYMBOL
--- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
@@ -447,6 +447,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __memcpy_chk_sse2_unaligned_erms)
 	      IFUNC_IMPL_ADD (array, i, __memcpy_chk, 1,
 			      __memcpy_chk_erms))
+#endif

  /* Support sysdeps/x86_64/multiarch/memcpy.c.  */
  IFUNC_IMPL (i, name, memcpy,
@@ -474,6 +475,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __memcpy_sse2_unaligned_erms)
 	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_erms))

+#ifdef SHARED
  /* Support sysdeps/x86_64/multiarch/mempcpy_chk.c.  */
  IFUNC_IMPL (i, name, __mempcpy_chk,
 	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
@@ -503,6 +505,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __mempcpy_chk_sse2_unaligned_erms)
 	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk, 1,
 			      __mempcpy_chk_erms))
+#endif

  /* Support sysdeps/x86_64/multiarch/mempcpy.c.  */
  IFUNC_IMPL (i, name, mempcpy,
@@ -539,6 +542,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strncmp_ssse3)
 	      IFUNC_IMPL_ADD (array, i, strncmp, 1, __strncmp_sse2))

+#ifdef SHARED
  /* Support sysdeps/x86_64/multiarch/wmemset_chk.c.  */
  IFUNC_IMPL (i, name, __wmemset_chk,
 	      IFUNC_IMPL_ADD (array, i, __wmemset_chk, 1,
--- a/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S
+++ b/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S
@@ -19,10 +19,7 @@

 #include <sysdep.h>

-#if IS_IN (libc) \
-    && (defined SHARED \
-        || defined USE_AS_MEMMOVE \
-	|| !defined USE_MULTIARCH)
+#if IS_IN (libc)

 #include "asm-syntax.h"

--- a/sysdeps/x86_64/multiarch/memcpy-ssse3.S
+++ b/sysdeps/x86_64/multiarch/memcpy-ssse3.S
@@ -19,10 +19,7 @@

 #include <sysdep.h>

-#if IS_IN (libc) \
-    && (defined SHARED \
-        || defined USE_AS_MEMMOVE \
-	|| !defined USE_MULTIARCH)
+#if IS_IN (libc)

 #include "asm-syntax.h"

--- a/sysdeps/x86_64/multiarch/memcpy.c
+++ b/sysdeps/x86_64/multiarch/memcpy.c
@@ -17,10 +17,8 @@
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

-/* Define multiple versions only for the definition in lib and for
-   DSO.  In static binaries we need memcpy before the initialization
-   happened.  */
-#if defined SHARED && IS_IN (libc)
+/* Define multiple versions only for the definition in libc.  */
+#if IS_IN (libc)
 # define memcpy __redirect_memcpy
 # include <string.h>
 # undef memcpy
@@ -31,8 +29,10 @@
 libc_ifunc_redirected (__redirect_memcpy, __new_memcpy,
 		       IFUNC_SELECTOR ());

+# ifdef SHARED
 __hidden_ver1 (__new_memcpy, __GI_memcpy, __redirect_memcpy)
  __attribute__ ((visibility ("hidden")));
+# endif

 # include <shlib-compat.h>
 versioned_symbol (libc, __new_memcpy, memcpy, GLIBC_2_14);
--- a/sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S
+++ b/sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S
@@ -23,7 +23,6 @@
 # include "asm-syntax.h"

 	.section .text.avx512,"ax",@progbits
-# if defined SHARED && !defined USE_AS_MEMPCPY && !defined USE_AS_MEMMOVE
 ENTRY (__mempcpy_chk_avx512_no_vzeroupper)
 	cmpq	%rdx, %rcx
 	jb	HIDDEN_JUMPTARGET (__chk_fail)
@@ -34,14 +33,11 @@ ENTRY (__mempcpy_avx512_no_vzeroupper)
 	addq	%rdx, %rax
 	jmp	L(start)
 END (__mempcpy_avx512_no_vzeroupper)
-# endif

-# ifdef SHARED
 ENTRY (__memmove_chk_avx512_no_vzeroupper)
 	cmpq	%rdx, %rcx
 	jb	HIDDEN_JUMPTARGET (__chk_fail)
 END (__memmove_chk_avx512_no_vzeroupper)
-# endif

 ENTRY (__memmove_avx512_no_vzeroupper)
 	mov	%rdi, %rax
@@ -413,8 +409,6 @@ L(gobble_256bytes_nt_loop_bkw):
 	jmp	L(check)
 END (__memmove_avx512_no_vzeroupper)

-# ifdef SHARED
 strong_alias (__memmove_avx512_no_vzeroupper, __memcpy_avx512_no_vzeroupper)
 strong_alias (__memmove_chk_avx512_no_vzeroupper, __memcpy_chk_avx512_no_vzeroupper)
-# endif
 #endif
--- a/sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S
@@ -18,9 +18,7 @@

 #if IS_IN (libc)
 # define MEMMOVE_SYMBOL(p,s)	p##_sse2_##s
-#endif
-
-#if !defined SHARED || !IS_IN (libc)
+#else
 weak_alias (__mempcpy, mempcpy)
 #endif

--- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
@@ -112,13 +112,11 @@ ENTRY (MEMMOVE_CHK_SYMBOL (__mempcpy_chk, unaligned))
 END (MEMMOVE_CHK_SYMBOL (__mempcpy_chk, unaligned))
 #endif

-#if VEC_SIZE == 16 || defined SHARED
 ENTRY (MEMPCPY_SYMBOL (__mempcpy, unaligned))
 	movq	%rdi, %rax
 	addq	%rdx, %rax
 	jmp	L(start)
 END (MEMPCPY_SYMBOL (__mempcpy, unaligned))
-#endif

 #if defined SHARED && IS_IN (libc)
 ENTRY (MEMMOVE_CHK_SYMBOL (__memmove_chk, unaligned))
@@ -151,7 +149,6 @@ L(nop):
 END (MEMMOVE_SYMBOL (__memmove, unaligned))

 # if VEC_SIZE == 16
-#  if defined SHARED
 ENTRY (__mempcpy_chk_erms)
 	cmpq	%rdx, %rcx
 	jb	HIDDEN_JUMPTARGET (__chk_fail)
@@ -163,7 +160,6 @@ ENTRY (__mempcpy_erms)
 	addq	%rdx, %rax
 	jmp	L(start_movsb)
 END (__mempcpy_erms)
-#  endif

 ENTRY (__memmove_chk_erms)
 	cmpq	%rdx, %rcx
@@ -193,10 +189,8 @@ L(movsb_backward):
 	cld
 	ret
 END (__memmove_erms)
-#  if defined SHARED
 strong_alias (__memmove_erms, __memcpy_erms)
 strong_alias (__memmove_chk_erms, __memcpy_chk_erms)
-#  endif
 # endif

 # ifdef SHARED
@@ -204,6 +198,7 @@ ENTRY (MEMMOVE_CHK_SYMBOL (__mempcpy_chk, unaligned_erms))
 	cmpq	%rdx, %rcx
 	jb	HIDDEN_JUMPTARGET (__chk_fail)
 END (MEMMOVE_CHK_SYMBOL (__mempcpy_chk, unaligned_erms))
+# endif

 ENTRY (MEMMOVE_SYMBOL (__mempcpy, unaligned_erms))
 	movq	%rdi, %rax
@@ -211,6 +206,7 @@ ENTRY (MEMMOVE_SYMBOL (__mempcpy, unaligned_erms))
 	jmp	L(start_erms)
 END (MEMMOVE_SYMBOL (__mempcpy, unaligned_erms))

+# ifdef SHARED
 ENTRY (MEMMOVE_CHK_SYMBOL (__memmove_chk, unaligned_erms))
 	cmpq	%rdx, %rcx
 	jb	HIDDEN_JUMPTARGET (__chk_fail)
@@ -546,19 +542,19 @@ L(loop_large_backward):
 #endif
 END (MEMMOVE_SYMBOL (__memmove, unaligned_erms))

-#ifdef SHARED
-# if IS_IN (libc)
-#  ifdef USE_MULTIARCH
+#if IS_IN (libc)
+# ifdef USE_MULTIARCH
 strong_alias (MEMMOVE_SYMBOL (__memmove, unaligned_erms),
 	      MEMMOVE_SYMBOL (__memcpy, unaligned_erms))
+#  ifdef SHARED
 strong_alias (MEMMOVE_SYMBOL (__memmove_chk, unaligned_erms),
 	      MEMMOVE_SYMBOL (__memcpy_chk, unaligned_erms))
 #  endif
+# endif
+# ifdef SHARED
 strong_alias (MEMMOVE_CHK_SYMBOL (__memmove_chk, unaligned),
 	      MEMMOVE_CHK_SYMBOL (__memcpy_chk, unaligned))
 # endif
 #endif
-#if VEC_SIZE == 16 || defined SHARED
 strong_alias (MEMMOVE_SYMBOL (__memmove, unaligned),
 	      MEMCPY_SYMBOL (__memcpy, unaligned))
-#endif
--- a/sysdeps/x86_64/multiarch/mempcpy.c
+++ b/sysdeps/x86_64/multiarch/mempcpy.c
@@ -17,10 +17,8 @@
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

-/* Define multiple versions only for the definition in lib and for
-   DSO.  In static binaries we need mempcpy before the initialization
-   happened.  */
-#if defined SHARED && IS_IN (libc)
+/* Define multiple versions only for the definition in libc.  */
+#if IS_IN (libc)
 # define mempcpy __redirect_mempcpy
 # define __mempcpy __redirect___mempcpy
 # define NO_MEMPCPY_STPCPY_REDIRECT
@@ -35,8 +33,10 @@
 libc_ifunc_redirected (__redirect_mempcpy, __mempcpy, IFUNC_SELECTOR ());

 weak_alias (__mempcpy, mempcpy)
+# ifdef SHARED
 __hidden_ver1 (__mempcpy, __GI___mempcpy, __redirect___mempcpy)
  __attribute__ ((visibility ("hidden")));
 __hidden_ver1 (mempcpy, __GI_mempcpy, __redirect_mempcpy)
  __attribute__ ((visibility ("hidden")));
+# endif
 #endif