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glibc/0006-AArch64-Cleanup-ifuncs.patch
liqingqing_1229 1015b7d4cd sync from glibc 2.38 upstream 
(cherry picked from commit 8edff846dce230900fb3c22e90566985af7766b3)
2024-05-10 20:13:45 +08:00

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From 25b66e8c4a75b51b0122089cf6b99860fb05470d Mon Sep 17 00:00:00 2001
From: Wilco Dijkstra <wilco.dijkstra@arm.com>
Date: Tue, 24 Oct 2023 13:51:07 +0100
Subject: [PATCH 06/26] AArch64: Cleanup ifuncs
Cleanup ifuncs. Remove uses of libc_hidden_builtin_def, use ENTRY rather than
ENTRY_ALIGN, remove unnecessary defines and conditional compilation. Rename
strlen_mte to strlen_generic. Remove rtld-memset.
Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
(cherry picked from commit 9fd3409842b3e2d31cff5dbd6f96066c430f0aa2)
---
sysdeps/aarch64/memset.S | 2 +-
sysdeps/aarch64/multiarch/Makefile | 2 +-
sysdeps/aarch64/multiarch/ifunc-impl-list.c | 2 +-
sysdeps/aarch64/multiarch/memchr_nosimd.S | 9 ++----
sysdeps/aarch64/multiarch/memcpy_a64fx.S | 14 +++-------
sysdeps/aarch64/multiarch/memcpy_falkor.S | 6 ++--
sysdeps/aarch64/multiarch/memcpy_sve.S | 2 --
sysdeps/aarch64/multiarch/memcpy_thunderx.S | 27 ++++--------------
sysdeps/aarch64/multiarch/memcpy_thunderx2.S | 28 +++----------------
sysdeps/aarch64/multiarch/memset_a64fx.S | 8 ++----
sysdeps/aarch64/multiarch/memset_base64.S | 3 +-
sysdeps/aarch64/multiarch/memset_emag.S | 8 ++----
sysdeps/aarch64/multiarch/memset_generic.S | 8 +++++-
sysdeps/aarch64/multiarch/memset_kunpeng.S | 9 ++----
sysdeps/aarch64/multiarch/rtld-memset.S | 25 -----------------
sysdeps/aarch64/multiarch/strlen.c | 4 +--
sysdeps/aarch64/multiarch/strlen_asimd.S | 1 -
.../{strlen_mte.S => strlen_generic.S} | 8 +++---
18 files changed, 41 insertions(+), 125 deletions(-)
delete mode 100644 sysdeps/aarch64/multiarch/rtld-memset.S
rename sysdeps/aarch64/multiarch/{strlen_mte.S => strlen_generic.S} (85%)
diff --git a/sysdeps/aarch64/memset.S b/sysdeps/aarch64/memset.S
index 50e5da3e7a..bf3cf85c8a 100644
--- a/sysdeps/aarch64/memset.S
+++ b/sysdeps/aarch64/memset.S
@@ -29,7 +29,7 @@
*
*/
-ENTRY_ALIGN (MEMSET, 6)
+ENTRY (MEMSET)
PTR_ARG (0)
SIZE_ARG (2)
diff --git a/sysdeps/aarch64/multiarch/Makefile b/sysdeps/aarch64/multiarch/Makefile
index e6099548b9..a1a4de3cd9 100644
--- a/sysdeps/aarch64/multiarch/Makefile
+++ b/sysdeps/aarch64/multiarch/Makefile
@@ -17,6 +17,6 @@ sysdep_routines += \
memset_kunpeng \
memset_mops \
strlen_asimd \
- strlen_mte \
+ strlen_generic \
# sysdep_routines
endif
diff --git a/sysdeps/aarch64/multiarch/ifunc-impl-list.c b/sysdeps/aarch64/multiarch/ifunc-impl-list.c
index da7f115377..836e8317a5 100644
--- a/sysdeps/aarch64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/aarch64/multiarch/ifunc-impl-list.c
@@ -70,7 +70,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL (i, name, strlen,
IFUNC_IMPL_ADD (array, i, strlen, !mte, __strlen_asimd)
- IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_mte))
+ IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_generic))
return 0;
}
diff --git a/sysdeps/aarch64/multiarch/memchr_nosimd.S b/sysdeps/aarch64/multiarch/memchr_nosimd.S
index 57e48375e9..7800751899 100644
--- a/sysdeps/aarch64/multiarch/memchr_nosimd.S
+++ b/sysdeps/aarch64/multiarch/memchr_nosimd.S
@@ -26,10 +26,6 @@
* Use base integer registers.
*/
-#ifndef MEMCHR
-# define MEMCHR __memchr_nosimd
-#endif
-
/* Arguments and results. */
#define srcin x0
#define chrin x1
@@ -62,7 +58,7 @@
#define REP8_7f 0x7f7f7f7f7f7f7f7f
-ENTRY_ALIGN (MEMCHR, 6)
+ENTRY (__memchr_nosimd)
PTR_ARG (0)
SIZE_ARG (2)
@@ -219,5 +215,4 @@ L(none_chr):
mov result, 0
ret
-END (MEMCHR)
-libc_hidden_builtin_def (MEMCHR)
+END (__memchr_nosimd)
diff --git a/sysdeps/aarch64/multiarch/memcpy_a64fx.S b/sysdeps/aarch64/multiarch/memcpy_a64fx.S
index f89b5b670a..baff7e96d0 100644
--- a/sysdeps/aarch64/multiarch/memcpy_a64fx.S
+++ b/sysdeps/aarch64/multiarch/memcpy_a64fx.S
@@ -39,9 +39,6 @@
#define vlen8 x8
#if HAVE_AARCH64_SVE_ASM
-# if IS_IN (libc)
-# define MEMCPY __memcpy_a64fx
-# define MEMMOVE __memmove_a64fx
.arch armv8.2-a+sve
@@ -97,7 +94,7 @@
#undef BTI_C
#define BTI_C
-ENTRY (MEMCPY)
+ENTRY (__memcpy_a64fx)
PTR_ARG (0)
PTR_ARG (1)
@@ -234,11 +231,10 @@ L(last_bytes):
st1b z3.b, p0, [dstend, -1, mul vl]
ret
-END (MEMCPY)
-libc_hidden_builtin_def (MEMCPY)
+END (__memcpy_a64fx)
-ENTRY_ALIGN (MEMMOVE, 4)
+ENTRY_ALIGN (__memmove_a64fx, 4)
PTR_ARG (0)
PTR_ARG (1)
@@ -307,7 +303,5 @@ L(full_overlap):
mov dst, dstin
b L(last_bytes)
-END (MEMMOVE)
-libc_hidden_builtin_def (MEMMOVE)
-# endif /* IS_IN (libc) */
+END (__memmove_a64fx)
#endif /* HAVE_AARCH64_SVE_ASM */
diff --git a/sysdeps/aarch64/multiarch/memcpy_falkor.S b/sysdeps/aarch64/multiarch/memcpy_falkor.S
index ec0e4ade24..67c4ab34eb 100644
--- a/sysdeps/aarch64/multiarch/memcpy_falkor.S
+++ b/sysdeps/aarch64/multiarch/memcpy_falkor.S
@@ -71,7 +71,7 @@
The non-temporal stores help optimize cache utilization. */
#if IS_IN (libc)
-ENTRY_ALIGN (__memcpy_falkor, 6)
+ENTRY (__memcpy_falkor)
PTR_ARG (0)
PTR_ARG (1)
@@ -198,7 +198,6 @@ L(loop64):
ret
END (__memcpy_falkor)
-libc_hidden_builtin_def (__memcpy_falkor)
/* RATIONALE:
@@ -216,7 +215,7 @@ libc_hidden_builtin_def (__memcpy_falkor)
For small and medium cases memcpy is used. */
-ENTRY_ALIGN (__memmove_falkor, 6)
+ENTRY (__memmove_falkor)
PTR_ARG (0)
PTR_ARG (1)
@@ -311,5 +310,4 @@ L(move_long):
3: ret
END (__memmove_falkor)
-libc_hidden_builtin_def (__memmove_falkor)
#endif
diff --git a/sysdeps/aarch64/multiarch/memcpy_sve.S b/sysdeps/aarch64/multiarch/memcpy_sve.S
index d11be6a443..2f14f91366 100644
--- a/sysdeps/aarch64/multiarch/memcpy_sve.S
+++ b/sysdeps/aarch64/multiarch/memcpy_sve.S
@@ -141,7 +141,6 @@ L(copy64_from_end):
ret
END (__memcpy_sve)
-libc_hidden_builtin_def (__memcpy_sve)
ENTRY (__memmove_sve)
@@ -208,5 +207,4 @@ L(return):
ret
END (__memmove_sve)
-libc_hidden_builtin_def (__memmove_sve)
#endif
diff --git a/sysdeps/aarch64/multiarch/memcpy_thunderx.S b/sysdeps/aarch64/multiarch/memcpy_thunderx.S
index 366287587f..14269b1a47 100644
--- a/sysdeps/aarch64/multiarch/memcpy_thunderx.S
+++ b/sysdeps/aarch64/multiarch/memcpy_thunderx.S
@@ -65,21 +65,7 @@
Overlapping large forward memmoves use a loop that copies backwards.
*/
-#ifndef MEMMOVE
-# define MEMMOVE memmove
-#endif
-#ifndef MEMCPY
-# define MEMCPY memcpy
-#endif
-
-#if IS_IN (libc)
-
-# undef MEMCPY
-# define MEMCPY __memcpy_thunderx
-# undef MEMMOVE
-# define MEMMOVE __memmove_thunderx
-
-ENTRY_ALIGN (MEMMOVE, 6)
+ENTRY (__memmove_thunderx)
PTR_ARG (0)
PTR_ARG (1)
@@ -91,9 +77,9 @@ ENTRY_ALIGN (MEMMOVE, 6)
b.lo L(move_long)
/* Common case falls through into memcpy. */
-END (MEMMOVE)
-libc_hidden_builtin_def (MEMMOVE)
-ENTRY (MEMCPY)
+END (__memmove_thunderx)
+
+ENTRY (__memcpy_thunderx)
PTR_ARG (0)
PTR_ARG (1)
@@ -316,7 +302,4 @@ L(move_long):
stp C_l, C_h, [dstin]
3: ret
-END (MEMCPY)
-libc_hidden_builtin_def (MEMCPY)
-
-#endif
+END (__memcpy_thunderx)
diff --git a/sysdeps/aarch64/multiarch/memcpy_thunderx2.S b/sysdeps/aarch64/multiarch/memcpy_thunderx2.S
index d3d6f1debc..93993b9e03 100644
--- a/sysdeps/aarch64/multiarch/memcpy_thunderx2.S
+++ b/sysdeps/aarch64/multiarch/memcpy_thunderx2.S
@@ -75,27 +75,12 @@
#define I_v v16
#define J_v v17
-#ifndef MEMMOVE
-# define MEMMOVE memmove
-#endif
-#ifndef MEMCPY
-# define MEMCPY memcpy
-#endif
-
-#if IS_IN (libc)
-
-#undef MEMCPY
-#define MEMCPY __memcpy_thunderx2
-#undef MEMMOVE
-#define MEMMOVE __memmove_thunderx2
-
-
/* Overlapping large forward memmoves use a loop that copies backwards.
Otherwise memcpy is used. Small moves branch to memcopy16 directly.
The longer memcpy cases fall through to the memcpy head.
*/
-ENTRY_ALIGN (MEMMOVE, 6)
+ENTRY (__memmove_thunderx2)
PTR_ARG (0)
PTR_ARG (1)
@@ -109,8 +94,7 @@ ENTRY_ALIGN (MEMMOVE, 6)
ccmp tmp1, count, 2, hi
b.lo L(move_long)
-END (MEMMOVE)
-libc_hidden_builtin_def (MEMMOVE)
+END (__memmove_thunderx2)
/* Copies are split into 3 main cases: small copies of up to 16 bytes,
@@ -124,8 +108,7 @@ libc_hidden_builtin_def (MEMMOVE)
#define MEMCPY_PREFETCH_LDR 640
- .p2align 4
-ENTRY (MEMCPY)
+ENTRY (__memcpy_thunderx2)
PTR_ARG (0)
PTR_ARG (1)
@@ -449,7 +432,7 @@ L(move_long):
3: ret
-END (MEMCPY)
+END (__memcpy_thunderx2)
.section .rodata
.p2align 4
@@ -472,6 +455,3 @@ L(ext_table):
.word L(ext_size_13) -.
.word L(ext_size_14) -.
.word L(ext_size_15) -.
-
-libc_hidden_builtin_def (MEMCPY)
-#endif
diff --git a/sysdeps/aarch64/multiarch/memset_a64fx.S b/sysdeps/aarch64/multiarch/memset_a64fx.S
index d520355143..7176f3d284 100644
--- a/sysdeps/aarch64/multiarch/memset_a64fx.S
+++ b/sysdeps/aarch64/multiarch/memset_a64fx.S
@@ -33,8 +33,6 @@
#define vector_length x9
#if HAVE_AARCH64_SVE_ASM
-# if IS_IN (libc)
-# define MEMSET __memset_a64fx
.arch armv8.2-a+sve
@@ -49,7 +47,7 @@
#undef BTI_C
#define BTI_C
-ENTRY (MEMSET)
+ENTRY (__memset_a64fx)
PTR_ARG (0)
SIZE_ARG (2)
@@ -166,8 +164,6 @@ L(L2):
add count, count, CACHE_LINE_SIZE
b L(last)
-END (MEMSET)
-libc_hidden_builtin_def (MEMSET)
+END (__memset_a64fx)
-#endif /* IS_IN (libc) */
#endif /* HAVE_AARCH64_SVE_ASM */
diff --git a/sysdeps/aarch64/multiarch/memset_base64.S b/sysdeps/aarch64/multiarch/memset_base64.S
index 35296a6dec..0e8f709fa5 100644
--- a/sysdeps/aarch64/multiarch/memset_base64.S
+++ b/sysdeps/aarch64/multiarch/memset_base64.S
@@ -34,7 +34,7 @@
*
*/
-ENTRY_ALIGN (MEMSET, 6)
+ENTRY (MEMSET)
PTR_ARG (0)
SIZE_ARG (2)
@@ -183,4 +183,3 @@ L(zva_64):
#endif
END (MEMSET)
-libc_hidden_builtin_def (MEMSET)
diff --git a/sysdeps/aarch64/multiarch/memset_emag.S b/sysdeps/aarch64/multiarch/memset_emag.S
index 17d609cead..6fecad4fae 100644
--- a/sysdeps/aarch64/multiarch/memset_emag.S
+++ b/sysdeps/aarch64/multiarch/memset_emag.S
@@ -19,8 +19,7 @@
#include <sysdep.h>
-#if IS_IN (libc)
-# define MEMSET __memset_emag
+#define MEMSET __memset_emag
/*
* Using DC ZVA to zero memory does not produce better performance if
@@ -30,7 +29,6 @@
* workloads.
*/
-# define DC_ZVA_THRESHOLD 0
+#define DC_ZVA_THRESHOLD 0
-# include "./memset_base64.S"
-#endif
+#include "./memset_base64.S"
diff --git a/sysdeps/aarch64/multiarch/memset_generic.S b/sysdeps/aarch64/multiarch/memset_generic.S
index 9c23e482bf..6c1f0daac8 100644
--- a/sysdeps/aarch64/multiarch/memset_generic.S
+++ b/sysdeps/aarch64/multiarch/memset_generic.S
@@ -21,9 +21,15 @@
#if IS_IN (libc)
# define MEMSET __memset_generic
+
+/* Do not hide the generic version of memset, we use it internally. */
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)
+
/* Add a hidden definition for use within libc.so. */
# ifdef SHARED
.globl __GI_memset; __GI_memset = __memset_generic
# endif
-# include <sysdeps/aarch64/memset.S>
#endif
+
+#include <../memset.S>
diff --git a/sysdeps/aarch64/multiarch/memset_kunpeng.S b/sysdeps/aarch64/multiarch/memset_kunpeng.S
index 86c46434fd..4a54373398 100644
--- a/sysdeps/aarch64/multiarch/memset_kunpeng.S
+++ b/sysdeps/aarch64/multiarch/memset_kunpeng.S
@@ -20,16 +20,13 @@
#include <sysdep.h>
#include <sysdeps/aarch64/memset-reg.h>
-#if IS_IN (libc)
-# define MEMSET __memset_kunpeng
-
/* Assumptions:
*
* ARMv8-a, AArch64, unaligned accesses
*
*/
-ENTRY_ALIGN (MEMSET, 6)
+ENTRY (__memset_kunpeng)
PTR_ARG (0)
SIZE_ARG (2)
@@ -108,6 +105,4 @@ L(set_long):
stp q0, q0, [dstend, -32]
ret
-END (MEMSET)
-libc_hidden_builtin_def (MEMSET)
-#endif
+END (__memset_kunpeng)
diff --git a/sysdeps/aarch64/multiarch/rtld-memset.S b/sysdeps/aarch64/multiarch/rtld-memset.S
deleted file mode 100644
index 4b035ed8b2..0000000000
--- a/sysdeps/aarch64/multiarch/rtld-memset.S
+++ /dev/null
@@ -1,25 +0,0 @@
-/* Memset for aarch64, for the dynamic linker.
- Copyright (C) 2017-2023 Free Software Foundation, Inc.
-
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library. If not, see
- <https://www.gnu.org/licenses/>. */
-
-#include <sysdep.h>
-
-#if IS_IN (rtld)
-# define MEMSET memset
-# include <sysdeps/aarch64/memset.S>
-#endif
diff --git a/sysdeps/aarch64/multiarch/strlen.c b/sysdeps/aarch64/multiarch/strlen.c
index bbdd3de8c4..728bd1936a 100644
--- a/sysdeps/aarch64/multiarch/strlen.c
+++ b/sysdeps/aarch64/multiarch/strlen.c
@@ -28,10 +28,10 @@
extern __typeof (__redirect_strlen) __strlen;
-extern __typeof (__redirect_strlen) __strlen_mte attribute_hidden;
+extern __typeof (__redirect_strlen) __strlen_generic attribute_hidden;
extern __typeof (__redirect_strlen) __strlen_asimd attribute_hidden;
-libc_ifunc (__strlen, (mte ? __strlen_mte : __strlen_asimd));
+libc_ifunc (__strlen, (mte ? __strlen_generic : __strlen_asimd));
# undef strlen
strong_alias (__strlen, strlen);
diff --git a/sysdeps/aarch64/multiarch/strlen_asimd.S b/sysdeps/aarch64/multiarch/strlen_asimd.S
index 490439491d..aee5ef9f78 100644
--- a/sysdeps/aarch64/multiarch/strlen_asimd.S
+++ b/sysdeps/aarch64/multiarch/strlen_asimd.S
@@ -203,4 +203,3 @@ L(page_cross):
ret
END (__strlen_asimd)
-libc_hidden_builtin_def (__strlen_asimd)
diff --git a/sysdeps/aarch64/multiarch/strlen_mte.S b/sysdeps/aarch64/multiarch/strlen_generic.S
similarity index 85%
rename from sysdeps/aarch64/multiarch/strlen_mte.S
rename to sysdeps/aarch64/multiarch/strlen_generic.S
index 1c1220b767..2346296a18 100644
--- a/sysdeps/aarch64/multiarch/strlen_mte.S
+++ b/sysdeps/aarch64/multiarch/strlen_generic.S
@@ -17,14 +17,14 @@
<https://www.gnu.org/licenses/>. */
/* The actual strlen code is in ../strlen.S. If we are building libc this file
- defines __strlen_mte. Otherwise the include of ../strlen.S will define
- the normal __strlen entry points. */
+ defines __strlen_generic. Otherwise the include of ../strlen.S will define
+ the normal __strlen entry points. */
#include <sysdep.h>
#if IS_IN (libc)
-# define STRLEN __strlen_mte
+# define STRLEN __strlen_generic
/* Do not hide the generic version of strlen, we use it internally. */
# undef libc_hidden_builtin_def
@@ -32,7 +32,7 @@
# ifdef SHARED
/* It doesn't make sense to send libc-internal strlen calls through a PLT. */
- .globl __GI_strlen; __GI_strlen = __strlen_mte
+ .globl __GI_strlen; __GI_strlen = __strlen_generic
# endif
#endif
--
2.33.0
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