amd64: barely boot into kernel code

1 files changed, 0 insertions, 89 deletions

diff --git a/src/kernel/arch/i386/sysenter.s b/src/kernel/arch/i386/sysenter.s
deleted file mode 100644
index d04f839..0000000
--- a/src/kernel/arch/i386/sysenter.s
+++ /dev/null
@@ -1,89 +0,0 @@
-/* arch/i386/gdt.c */
-.set SEG_r0code, 1
-.set SEG_r3code, 3
-.set SEG_r3data, 4
-
-.set IA32_SYSENTER_CS, 0x174
-.set IA32_SYSENTER_ESP, 0x175
-.set IA32_SYSENTER_EIP, 0x176
-
-.section .text
-.global sysenter_setup
-.type sysenter_setup, @function
-sysenter_setup:
-	xor %edx, %edx
-
-	mov $(SEG_r0code << 3), %eax
-	mov $IA32_SYSENTER_CS, %ecx
-	wrmsr
-
-	mov $IA32_SYSENTER_ESP, %ecx
-	mov $0, %eax // unused
-	wrmsr
-
-	mov $IA32_SYSENTER_EIP, %ecx
-	mov $sysenter_stage1, %eax
-	wrmsr
-
-	ret
-
-
-.section .shared
-
-.global stored_eax
-stored_eax:
-.long 0
-
-.global _sysexit_real
-.type _sysexit_real, @function
-_sysexit_real:
-	mov $(SEG_r3data << 3 | 3), %ax
-	mov %ax, %ds
-	mov %ax, %es
-	mov %ax, %fs
-	mov %ax, %gs
-
-	// restore the registers
-	mov $_sysexit_regs, %esp
-	pop %edi
-	pop %esi
-	pop %ebp
-	add $4, %esp
-	pop %ebx
-	pop %edx
-	pop %ecx
-	pop %eax
-
-	// enable paging
-	mov %eax, stored_eax
-	mov %cr0, %eax
-	or $0x80000000, %eax
-	mov %eax, %cr0
-	mov stored_eax, %eax
-
-	sysexit
-
-sysenter_stage1:
-	cli /* prevent random IRQs in the middle of kernel code */
-
-	//   disable paging
-	// I don't want to damage any of the registers passed in by the user,
-	// so i'm using ESP as a temporary register. At this point there's nothing
-	// useful in it, it's == _bss_end.
-	mov %cr0, %esp
-	and $0x7FFFFFFF, %esp  // disable paging
-	mov %esp, %cr0
-
-	// save the registers
-	mov $(_sysexit_regs + 32), %esp
-	push %eax
-	push %ecx
-	push %edx
-	push %ebx
-	push $0x0 // pushal pushes %esp here, but that's worthless
-	push %ebp
-	push %esi
-	push %edi
-
-	mov $_bss_end, %esp
-	jmp sysenter_stage2