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tools/nolibc: x86_64: use local label in memcpy/memmove

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Compiling arch-x86_64.h with clang and binutils LD yields
duplicate label errors:

.../gcc-13.2.0-nolibc/x86_64-linux/bin/x86_64-linux-ld: error: LLVM gold plugin: <inline asm>:44:1: symbol '.Lbackward_copy' is already defined
.Lbackward_copy:leaq -1(%rdi, %rcx, 1), %rdi

Instead of a local symbol use a local label which can be defined
multiple times and therefore avoids the error.

Reviewed-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20240812-nolibc-lto-v2-3-736af7bbefa8@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Thomas Weißschuh 2024-08-12 22:50:19 +02:00
parent ff7b9abbfc
commit 25fb329a23
1 changed files with 2 additions and 2 deletions
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4
tools/include/nolibc/arch-x86_64.h
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@ -193,10 +193,10 @@ __asm__ (
"movq %rdi, %rdx\n\t"
"subq %rsi, %rdx\n\t"
"cmpq %rcx, %rdx\n\t"
"jb .Lbackward_copy\n\t"
"jb 1f\n\t"
"rep movsb\n\t"
"retq\n"
".Lbackward_copy:"
"1:" /* backward copy */
"leaq -1(%rdi, %rcx, 1), %rdi\n\t"
"leaq -1(%rsi, %rcx, 1), %rsi\n\t"
"std\n\t"