vtgl

Commit: 7731cc2627da2f49545f4a8b32a02cc2cf6540db
Parent: 33cc37bdd2ed039a9b551f93f53a8cd2ea70c8f9
Author: Randy Palamar
Date:   Sat, 28 Dec 2024 13:34:23 -0700

amd64: fix incorrect register in syscall5

linux syscall register use on amd64 is a literal difficult to
follow. Its quite annoying that they based the entire linux
syscall calling convention on the x86/amd64 calling convention but
fortunately we avoid to useless movs on aarch64 by defining the
interface ourselves.

Diffstat:
M
platform_linux_amd64.c
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/platform_linux_amd64.c b/platform_linux_amd64.c
@@ -99,10 +99,10 @@ syscall5(i64 n, i64 a1, i64 a2, i64 a3, i64 a4, i64 a5)
 {
 	i64 result;
 	register i64 r10 asm("r10") = a4;
-	register i64 r9  asm("r9")  = a5;
+	register i64 r8  asm("r8")  = a5;
 	asm volatile ("syscall"
 		: "=a"(result)
-		: "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r9)
+		: "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r8)
 		: "rcx", "r11", "memory"
 	);
 	return result;