From 549bd4a7fd2725b68e71f12859186c57533cdc9a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ciro=20Santilli=20=E5=85=AD=E5=9B=9B=E4=BA=8B=E4=BB=B6=20?=
 =?UTF-8?q?=E6=B3=95=E8=BD=AE=E5=8A=9F?= <ciro.santilli@gmail.com>
Date: Sun, 5 May 2019 00:00:00 +0000
Subject: [PATCH] x86 fail works

---
 userland/arch/x86_64/common_arch.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/userland/arch/x86_64/common_arch.h b/userland/arch/x86_64/common_arch.h
index 51217ef..709bba2 100644
--- a/userland/arch/x86_64/common_arch.h
+++ b/userland/arch/x86_64/common_arch.h
@@ -54,16 +54,17 @@ asm_main_after_prologue: \
     mov $0, %rax; \
     jmp pass; \
 fail: \
-    mov -0x8(%rbp), %rbx; \
+    /* -0x30(%rbp) is argument 1 which we pushed at prologue */ \
+    mov -0x30(%rbp), %rbx; \
     movl %eax, (%rbx); \
     mov $1, %rax; \
 pass: \
+    add $16, %rsp; \
     pop %rbx; \
     pop %r12; \
     pop %r13; \
     pop %r14; \
     pop %r15; \
-    add $16, %rsp; \
     pop %rbp; \
     ret; \
 ;