1 files changed, 146 insertions, 0 deletions
diff --git a/src/kernel/asm.s b/src/kernel/asm.s
new file mode 100644
index 0000000..1022817
--- /dev/null
+++ b/src/kernel/asm.s
@@ -0,0 +1,146 @@
+/*
+ *  linux/kernel/asm.s
+ *
+ *  (C) 1991  Linus Torvalds
+ */
+/*
+ * asm.s contains the low-level code for most hardware faults.
+ * page_exception is handled by the mm, so that isn't here. This
+ * file also handles (hopefully) fpu-exceptions due to TS-bit, as
+ * the fpu must be properly saved/resored. This hasn't been tested.
+ */
+.globl divide_error,debug,nmi,int3,overflow,bounds,invalid_op
+.globl double_fault,coprocessor_segment_overrun
+.globl invalid_TSS,segment_not_present,stack_segment
+.globl general_protection,coprocessor_error,irq13,reserved
+divide_error:
+        pushl $do_divide_error
+no_error_code:
+        xchgl %eax,(%esp)
+        pushl %ebx
+        pushl %ecx
+        pushl %edx
+        pushl %edi
+        pushl %esi
+        pushl %ebp
+        push %ds
+        push %es
+        push %fs
+        pushl $0                # "error code"
+        lea 44(%esp),%edx
+        pushl %edx
+        movl $0x10,%edx
+        mov %dx,%ds
+        mov %dx,%es
+        mov %dx,%fs
+        call *%eax
+        addl $8,%esp
+        pop %fs
+        pop %es
+        pop %ds
+        popl %ebp
+        popl %esi
+        popl %edi
+        popl %edx
+        popl %ecx
+        popl %ebx
+        popl %eax
+        iret
+debug:
+        pushl $do_int3          # _do_debug
+        jmp no_error_code
+nmi:
+        pushl $do_nmi
+        jmp no_error_code
+int3:
+        pushl $do_int3
+        jmp no_error_code
+overflow:
+        pushl $do_overflow
+        jmp no_error_code
+bounds:
+        pushl $do_bounds
+        jmp no_error_code
+invalid_op:
+        pushl $do_invalid_op
+        jmp no_error_code
+coprocessor_segment_overrun:
+        pushl $do_coprocessor_segment_overrun
+        jmp no_error_code
+reserved:
+        pushl $do_reserved
+        jmp no_error_code
+irq13:
+        pushl %eax
+        xorb %al,%al
+        outb %al,$0xF0
+        movb $0x20,%al
+        outb %al,$0x20
+        jmp 1f
+1:      jmp 1f
+1:      outb %al,$0xA0
+        popl %eax
+        jmp coprocessor_error
+double_fault:
+        pushl $do_double_fault
+error_code:
+        xchgl %eax,4(%esp)              # error code <-> %eax
+        xchgl %ebx,(%esp)               # &function <-> %ebx
+        pushl %ecx
+        pushl %edx
+        pushl %edi
+        pushl %esi
+        pushl %ebp
+        push %ds
+        push %es
+        push %fs
+        pushl %eax                      # error code
+        lea 44(%esp),%eax               # offset
+        pushl %eax
+        movl $0x10,%eax
+        mov %ax,%ds
+        mov %ax,%es
+        mov %ax,%fs
+        call *%ebx
+        addl $8,%esp
+        pop %fs
+        pop %es
+        pop %ds
+        popl %ebp
+        popl %esi
+        popl %edi
+        popl %edx
+        popl %ecx
+        popl %ebx
+        popl %eax
+        iret
+invalid_TSS:
+        pushl $do_invalid_TSS
+        jmp error_code
+segment_not_present:
+        pushl $do_segment_not_present
+        jmp error_code
+stack_segment:
+        pushl $do_stack_segment
+        jmp error_code
+general_protection:
+        pushl $do_general_protection
+        jmp error_code

diff --git a/src/kernel/asm.s b/src/kernel/asm.s new file mode 100644 index 0000000..1022817 --- /dev/null +++ b/src/kernel/asm.s
@@ -0,0 +1,146 @@
	1	/*
	2	* linux/kernel/asm.s
	3	*
	4	* (C) 1991 Linus Torvalds
	5	*/
	6
	7	/*
	8	* asm.s contains the low-level code for most hardware faults.
	9	* page_exception is handled by the mm, so that isn't here. This
	10	* file also handles (hopefully) fpu-exceptions due to TS-bit, as
	11	* the fpu must be properly saved/resored. This hasn't been tested.
	12	*/
	13
	14	.globl divide_error,debug,nmi,int3,overflow,bounds,invalid_op
	15	.globl double_fault,coprocessor_segment_overrun
	16	.globl invalid_TSS,segment_not_present,stack_segment
	17	.globl general_protection,coprocessor_error,irq13,reserved
	18
	19	divide_error:
	20	pushl $do_divide_error
	21	no_error_code:
	22	xchgl %eax,(%esp)
	23	pushl %ebx
	24	pushl %ecx
	25	pushl %edx
	26	pushl %edi
	27	pushl %esi
	28	pushl %ebp
	29	push %ds
	30	push %es
	31	push %fs
	32	pushl $0 # "error code"
	33	lea 44(%esp),%edx
	34	pushl %edx
	35	movl $0x10,%edx
	36	mov %dx,%ds
	37	mov %dx,%es
	38	mov %dx,%fs
	39	call *%eax
	40	addl $8,%esp
	41	pop %fs
	42	pop %es
	43	pop %ds
	44	popl %ebp
	45	popl %esi
	46	popl %edi
	47	popl %edx
	48	popl %ecx
	49	popl %ebx
	50	popl %eax
	51	iret
	52
	53	debug:
	54	pushl $do_int3 # _do_debug
	55	jmp no_error_code
	56
	57	nmi:
	58	pushl $do_nmi
	59	jmp no_error_code
	60
	61	int3:
	62	pushl $do_int3
	63	jmp no_error_code
	64
	65	overflow:
	66	pushl $do_overflow
	67	jmp no_error_code
	68
	69	bounds:
	70	pushl $do_bounds
	71	jmp no_error_code
	72
	73	invalid_op:
	74	pushl $do_invalid_op
	75	jmp no_error_code
	76
	77	coprocessor_segment_overrun:
	78	pushl $do_coprocessor_segment_overrun
	79	jmp no_error_code
	80
	81	reserved:
	82	pushl $do_reserved
	83	jmp no_error_code
	84
	85	irq13:
	86	pushl %eax
	87	xorb %al,%al
	88	outb %al,$0xF0
	89	movb $0x20,%al
	90	outb %al,$0x20
	91	jmp 1f
	92	1: jmp 1f
	93	1: outb %al,$0xA0
	94	popl %eax
	95	jmp coprocessor_error
	96
	97	double_fault:
	98	pushl $do_double_fault
	99	error_code:
	100	xchgl %eax,4(%esp) # error code <-> %eax
	101	xchgl %ebx,(%esp) # &function <-> %ebx
	102	pushl %ecx
	103	pushl %edx
	104	pushl %edi
	105	pushl %esi
	106	pushl %ebp
	107	push %ds
	108	push %es
	109	push %fs
	110	pushl %eax # error code
	111	lea 44(%esp),%eax # offset
	112	pushl %eax
	113	movl $0x10,%eax
	114	mov %ax,%ds
	115	mov %ax,%es
	116	mov %ax,%fs
	117	call *%ebx
	118	addl $8,%esp
	119	pop %fs
	120	pop %es
	121	pop %ds
	122	popl %ebp
	123	popl %esi
	124	popl %edi
	125	popl %edx
	126	popl %ecx
	127	popl %ebx
	128	popl %eax
	129	iret
	130
	131	invalid_TSS:
	132	pushl $do_invalid_TSS
	133	jmp error_code
	134
	135	segment_not_present:
	136	pushl $do_segment_not_present
	137	jmp error_code
	138
	139	stack_segment:
	140	pushl $do_stack_segment
	141	jmp error_code
	142
	143	general_protection:
	144	pushl $do_general_protection
	145	jmp error_code
	146