commit ab457f9022b4fe5f1ab1778761288175fc388648
author caowencheng <caowencheng@eswincomputing.com> Mon Mar 06 14:57:55 2023 +0800
committer wencheng cao <caowencheng@eswincomputing.com> Mon Mar 06 07:23:10 2023 +0000
tree 7f1ab719faec40a59136aee8583367930934d356
parent c920ac5695bbc0d4ea95067d615524978814229a

memset_chk into assembly file

Writing an assembly file can reduce several
assembly instructions, and compare it through
the disassembly of this file

Test: make libc
Change-Id: Ifdcc9c76742cc95b2ad9e3c14fac4796c36e12e6
Signed-off-by: caowencheng <caowencheng@eswincomputing.com>

libc/arch-riscv64/string/__memset_chk.S

diff --git a/libc/arch-riscv64/string/__memset_chk.S b/libc/arch-riscv64/string/__memset_chk.S
new file mode 100644
index 0000000..a5562cb
--- /dev/null
+++ b/libc/arch-riscv64/string/__memset_chk.S
@@ -0,0 +1,10 @@
+#include <private/bionic_asm.h>
+
+ENTRY(__memset_chk)
+    bleu    a2, a3, 1f
+    call    __memset_chk_fail
+
+1:
+    tail   memset
+END(__memset_chk)
+