X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86_64%2Fstart64.asm;h=b0a85868ceb4b5ba4ad60056d6d3f3d96d38396f;hb=952891ddb96a341c0e24ecb7dec6361c7bbeaece;hp=d0cc503fc1cbf8a2760aa85b4aad65987667bab3;hpb=a1b7b0fcbf99e2c53dd6d7ee5961772bf29bdb2b;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86_64/start64.asm b/Kernel/arch/x86_64/start64.asm
index d0cc503f..b0a85868 100644
--- a/Kernel/arch/x86_64/start64.asm
+++ b/Kernel/arch/x86_64/start64.asm
@@ -106,16 +106,53 @@ Proc_ReturnToUser:
 CallWithArgArray:
 	push rbp
 	mov rbp, rsp
-	mov rcx, [rbp+3*8]	; Get NArgs
-	mov rdx, [rbp+4*8]
-
-.top:
-	mov rax, [rdx+rcx*8-8]
-	push rax
-	loop .top
+	push r10
+	push r11
+	
+	mov [rbp+2*8], rdi	; Save Ptr to stack
 	
-	mov rax, [rbp+2*8]
+	mov r11, rsi	; NArgs
+	mov r10, rdx	; Args
+
+	; Arg 1: RDI
+	mov rdi, [r10]
+	add r10, 8
+	dec r11
+	jz .call
+	; Arg 2: RSI
+	mov rsi, [r10]
+	add r10, 8
+	dec r11
+	jz .call
+	; Arg 3: RDX
+	mov rdx, [r10]
+	add r10, 8
+	dec r11
+	jz .call
+	; Arg 4: RCX
+	mov rcx, [r10]
+	add r10, 8
+	dec r11
+	jz .call
+	; Arg 5: R8
+	mov r8, [r10]
+	add r10, 8
+	dec r11
+	jz .call
+	; Arg 6: R9
+	mov r9, [r10]
+	add r10, 8
+	dec r11
+	jz .call
+	; No support for more
+
+.call:
+	mov rax, [rbp+2*8]	; Ptr
 	call rax
+	
+	pop r11
+	pop r10
+	
 	lea rsp, [rbp]
 	pop rbp
 	ret