From cbb8e65e234e0139c0c516bb6b9110d210eecd3f Mon Sep 17 00:00:00 2001 From: Benjamin Berg Date: Thu, 19 Sep 2024 14:45:02 +0200 Subject: [PATCH] um: Add generic stub_syscall1 function The 64bit version did not have a stub_syscall1 function yet. Add it as it will be useful to implement a static binary for stub loading. Signed-off-by: Benjamin Berg Link: https://patch.msgid.link/20240919124511.282088-2-benjamin@sipsolutions.net Signed-off-by: Johannes Berg --- arch/x86/um/shared/sysdep/stub_64.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/um/shared/sysdep/stub_64.h b/arch/x86/um/shared/sysdep/stub_64.h index 67f44284f1aa4..8e4ff39dcade5 100644 --- a/arch/x86/um/shared/sysdep/stub_64.h +++ b/arch/x86/um/shared/sysdep/stub_64.h @@ -28,6 +28,17 @@ static __always_inline long stub_syscall0(long syscall) return ret; } +static __always_inline long stub_syscall1(long syscall, long arg1) +{ + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1) : __syscall_clobber ); + + return ret; +} + static __always_inline long stub_syscall2(long syscall, long arg1, long arg2) { long ret; -- 2.50.1