X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86_64%2Fdesctab.asm;h=27ba9137829b8fe507856972fde87aa61db922ea;hb=e957c67ea0f63a668303d087af7ee0c7ecff1f01;hp=694672c72b2d5b2f4f7ec1acddb9ef154686593d;hpb=a59083b859599aeee6ab3e4fd6a0113faa5fddf5;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86_64/desctab.asm b/Kernel/arch/x86_64/desctab.asm
index 694672c7..27ba9137 100644
--- a/Kernel/arch/x86_64/desctab.asm
+++ b/Kernel/arch/x86_64/desctab.asm
@@ -128,7 +128,7 @@ Desctab_Init:
 	
 	ret
 
-; int IRQ_AddHandler(int IRQ, void (*Handler)(int IRQ))
+; int IRQ_AddHandler(int IRQ, void (*Handler)(int IRQ), void *Ptr)
 ; Return Values:
 ;  0 on Success
 ; -1 on an invalid IRQ Number
@@ -137,6 +137,7 @@ Desctab_Init:
 IRQ_AddHandler:
 	; RDI - IRQ Number
 	; RSI - Callback
+	; RDX - Ptr
 	
 	; Check for RDI >= 16
 	cmp rdi, 16
@@ -153,8 +154,8 @@ IRQ_AddHandler:
 	
 	; Find a free callback slot
 	%rep NUM_IRQ_CALLBACKS
-	mov rdx, [rax]
-	test rdx, rdx
+	mov rcx, [rax]
+	test rcx, rcx
 	jz .assign
 	add rax, 8
 	%endrep
@@ -170,6 +171,7 @@ IRQ_AddHandler:
 	push rdi
 	push rsi
 	push rax
+	push rdx
 	sub rsp, 8
 	mov rcx, rdi	; IRQ Number
 	mov rdx, rsi	; Callback
@@ -177,12 +179,15 @@ IRQ_AddHandler:
 	mov rdi, csIRQ_Assigned
 	call Log
 	add rsp, 8
+	pop rdx
 	pop rax
 	pop rsi
 	pop rdi
 
 	; Assign and return
 	mov [rax], rsi
+	add rax, gaIRQ_DataPtrs - gaIRQ_Handlers
+	mov [rax], rdx
 	xor rax, rax
 
 .ret:
@@ -300,6 +305,7 @@ IrqCommon:
 	jz .skip.%[i]
 	; Set RDI to IRQ number
 	mov rdi, [rsp+(16+2+1)*8]	; Get IRQ number
+	mov rsi, [rbx-gaIRQ_Handlers+gaIRQ_DataPtrs]
 	call rax	; Call
 .skip.%[i]:
 	add rbx, 8	; Next!
@@ -374,6 +380,7 @@ SchedulerIRQ:
 	pop gs
 	POP_GPR
 	add rsp, 2*8	; Dummy error code and IRQ num
+;	xchg bx, bx
 	iretq
 
 [extern ci_offsetof_tThread_KernelStack]
@@ -416,6 +423,10 @@ SyscallStub:
 	pop r11
 	pop rcx
 	pop rsp 	; Change back to user stack
+	; TODO: Determine if user is 64 or 32 bit
+
+;	xchg bx, bx	
+	db 0x48	; REX, nasm doesn't have a sysretq opcode
 	sysret
 
 [section .data]
@@ -428,3 +439,5 @@ gIDTPtr:
 
 gaIRQ_Handlers:
 	times	16*NUM_IRQ_CALLBACKS	dq	0
+gaIRQ_DataPtrs:
+	times	16*NUM_IRQ_CALLBACKS	dq	0