From 1d0512957e802acfe7b677b30589a4e3bd26fac8 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Tue, 14 Sep 2021 20:31:40 +0200
Subject: add support for 4-parameter syscalls

---
 src/kernel/arch/generic.h       | 2 +-
 src/kernel/arch/i386/sysenter.c | 2 +-
 src/kernel/syscalls.c           | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

(limited to 'src/kernel')

diff --git a/src/kernel/arch/generic.h b/src/kernel/arch/generic.h
index 547109f..dd145f7 100644
--- a/src/kernel/arch/generic.h
+++ b/src/kernel/arch/generic.h
@@ -18,7 +18,7 @@ void halt_cpu(void);
 
 // src/arch/i386/sysenter.s
 _Noreturn void sysexit(struct registers);
-int syscall_handler(int, int, int, int);
+int syscall_handler(int, int, int, int, int);
 
 // all of those can allocate memory
 struct pagedir *pagedir_new(void);
diff --git a/src/kernel/arch/i386/sysenter.c b/src/kernel/arch/i386/sysenter.c
index 231aba5..6419439 100644
--- a/src/kernel/arch/i386/sysenter.c
+++ b/src/kernel/arch/i386/sysenter.c
@@ -22,7 +22,7 @@ _Noreturn void sysenter_stage2(void) {
 	regs->eip = (userptr_t) regs->edx;
 
 	val = syscall_handler(regs->eax, regs->ebx,
-	                      regs->esi, regs->edi);
+	                      regs->esi, regs->edi, (uintptr_t)regs->ebp);
 	regs_savereturn(&process_current->regs, val);
 
 	process_switch(process_current); // TODO process_resume
diff --git a/src/kernel/syscalls.c b/src/kernel/syscalls.c
index 6821871..9002628 100644
--- a/src/kernel/syscalls.c
+++ b/src/kernel/syscalls.c
@@ -250,7 +250,7 @@ int _syscall_memflag(void __user *addr, size_t len, int flags) {
 	return -1;
 }
 
-int syscall_handler(int num, int a, int b, int c) {
+int syscall_handler(int num, int a, int b, int c, int d) {
 	switch (num) {
 		case _SYSCALL_EXIT:
 			_syscall_exit((userptr_t)a, b);
-- 
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