From 912d2e3c7eb1baa71dda2c0a28aa5809eaa96f27 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 16 Jul 2022 13:33:00 +0200
Subject: amd64: barely boot into kernel code

---
 src/kernel/arch/i386/interrupts/isr_stub.s | 64 ------------------------------
 1 file changed, 64 deletions(-)
 delete mode 100644 src/kernel/arch/i386/interrupts/isr_stub.s

(limited to 'src/kernel/arch/i386/interrupts/isr_stub.s')

diff --git a/src/kernel/arch/i386/interrupts/isr_stub.s b/src/kernel/arch/i386/interrupts/isr_stub.s
deleted file mode 100644
index fdbae6f..0000000
--- a/src/kernel/arch/i386/interrupts/isr_stub.s
+++ /dev/null
@@ -1,64 +0,0 @@
-.section .shared
-
-.global _isr_stubs
-_isr_stubs:
-.rept 256
-	.set _stub_start, .
-
-	cli
-	call _isr_stage2
-
-	.if . - _stub_start > 8
-		.error "isr stubs over maximum size"
-		.abort
-	.endif
-	.align 8
-.endr
-
-_isr_stage2:
-	// pushal order, without %esp
-	push %eax
-	push %ecx
-	push %edx
-	push %ebx
-	push %ebp
-	push %esi
-	push %edi
-
-	// convert the return address into the vector nr
-	mov 28(%esp), %eax
-	add $-_isr_stubs, %eax
-	shr $3, %eax
-
-	// disable paging, if present
-	mov %cr0, %ebx
-	push %ebx // push original cr0
-	and $0x7FFFFFFF, %ebx
-	mov %ebx, %cr0
-
-	mov %esp, %ebp
-	mov $_isr_big_stack, %esp
-	push %eax // push the vector nr
-	call isr_stage3
-
-	mov %ebp, %esp
-	pop %eax // restore old cr0
-	mov %eax, %cr0
-
-	// restore registers
-	pop %edi
-	pop %esi
-	pop %ebp
-	pop %ebx
-	pop %edx
-	pop %ecx
-	pop %eax
-
-	add $4, %esp // skip call's return address
-	iret
-
-.align 8
-// TODO overflow check
-.skip 64 // seems to be enough
-.global _isr_mini_stack
-_isr_mini_stack:
-- 
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