From 5126951a79d722793e654cddcc8996f73f0c5d05 Mon Sep 17 00:00:00 2001
From: Edgaru089 <sjs333@outlook.com>
Date: Sun, 14 Nov 2021 19:42:44 +0800
Subject: [PATCH] driver/pic: one argument for IRQ handlers

---
 driver/irq/pic/int_handler.asm.S | 2 ++
 driver/irq/pic/pic.h             | 1 +
 driver/irq/pic/pic_init.c        | 1 +
 3 files changed, 4 insertions(+)

diff --git a/driver/irq/pic/int_handler.asm.S b/driver/irq/pic/int_handler.asm.S
index d42215e..d626533 100644
--- a/driver/irq/pic/int_handler.asm.S
+++ b/driver/irq/pic/int_handler.asm.S
@@ -3,6 +3,7 @@ format elf64
 include 'pic_constants.incS'
 
 extrn irq_pic_IntHandler
+extrn irq_pic_IRQHandler_Data
 extrn irq_pic_IRQHandlerRaw
 
 public irq_pic_IntHandler20h
@@ -52,6 +53,7 @@ macro inth op1 {
 	push r9
 	push r10
 	push r11
+	mov  rdi, [irq_pic_IRQHandler_Data+op1*8]
 	call irq_pic_IntHandler
 	pop r11
 	pop r10
diff --git a/driver/irq/pic/pic.h b/driver/irq/pic/pic.h
index ddddbd4..6165745 100644
--- a/driver/irq/pic/pic.h
+++ b/driver/irq/pic/pic.h
@@ -34,6 +34,7 @@ typedef SYSV_ABI void (*irq_pic_IRQHandlerType)();
 
 // defined in pic_init.c
 extern irq_pic_IRQHandlerType irq_pic_IRQHandler[16];
+extern uintptr_t              irq_pic_IRQHandler_Data[16]; // written into RDI on handler (first argument)
 extern bool                   irq_pic_Enabled;
 
 // If IRQHandlerRaw[irq] is not NULL, the function is jumped to (not called).
diff --git a/driver/irq/pic/pic_init.c b/driver/irq/pic/pic_init.c
index cbcdbc9..9030adf 100644
--- a/driver/irq/pic/pic_init.c
+++ b/driver/irq/pic/pic_init.c
@@ -10,6 +10,7 @@
 
 
 irq_pic_IRQHandlerType irq_pic_IRQHandler[16];
+uintptr_t              irq_pic_IRQHandler_Data[16];
 void *                 irq_pic_IRQHandlerRaw[16];
 bool                   irq_pic_Enabled;