Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

arch/x86_64/cpu/isr_stubs.asm

@@ -0,0 +1,133 @@
+[BITS 64]
+
+extern isr_handler_common
+global isr_stub_table
+global isr_stub_default
+
+%macro ISR_NOERRCODE 1
+isr_stub_%1:
+    push qword 0        ; Dummy error code
+    push qword %1       ; Interrupt vector number
+    jmp isr_common_stub
+%endmacro
+
+%macro ISR_ERRCODE 1
+isr_stub_%1:
+    push qword %1       ; Interrupt vector number (error code already on stack)
+    jmp isr_common_stub
+%endmacro
+
+section .text
+
+; CPU Exceptions 0-31
+ISR_NOERRCODE 0
+ISR_NOERRCODE 1
+ISR_NOERRCODE 2
+ISR_NOERRCODE 3
+ISR_NOERRCODE 4
+ISR_NOERRCODE 5
+ISR_NOERRCODE 6
+ISR_NOERRCODE 7
+ISR_ERRCODE   8
+ISR_NOERRCODE 9
+ISR_ERRCODE   10
+ISR_ERRCODE   11
+ISR_ERRCODE   12
+ISR_ERRCODE   13
+ISR_ERRCODE   14
+ISR_NOERRCODE 15
+ISR_NOERRCODE 16
+ISR_ERRCODE   17
+ISR_NOERRCODE 18
+ISR_NOERRCODE 19
+ISR_NOERRCODE 20
+ISR_NOERRCODE 21
+ISR_NOERRCODE 22
+ISR_NOERRCODE 23
+ISR_NOERRCODE 24
+ISR_NOERRCODE 25
+ISR_NOERRCODE 26
+ISR_NOERRCODE 27
+ISR_NOERRCODE 28
+ISR_NOERRCODE 29
+ISR_ERRCODE   30
+ISR_NOERRCODE 31
+
+; Hardware IRQs 32-47
+ISR_NOERRCODE 32
+ISR_NOERRCODE 33
+ISR_NOERRCODE 34
+ISR_NOERRCODE 35
+ISR_NOERRCODE 36
+ISR_NOERRCODE 37
+ISR_NOERRCODE 38
+ISR_NOERRCODE 39
+ISR_NOERRCODE 40
+ISR_NOERRCODE 41
+ISR_NOERRCODE 42
+ISR_NOERRCODE 43
+ISR_NOERRCODE 44
+ISR_NOERRCODE 45
+ISR_NOERRCODE 46
+ISR_NOERRCODE 47
+
+isr_stub_default:
+    push qword 0
+    push qword 255
+    jmp isr_common_stub
+
+isr_common_stub:
+    push rax
+    push rbx
+    push rcx
+    push rdx
+    push rsi
+    push rdi
+    push rbp
+    push r8
+    push r9
+    push r10
+    push r11
+    push r12
+    push r13
+    push r14
+    push r15
+
+    mov rdi, rsp
+    cld
+    call isr_handler_common
+
+    pop r15
+    pop r14
+    pop r13
+    pop r12
+    pop r11
+    pop r10
+    pop r9
+    pop r8
+    pop rbp
+    pop rdi
+    pop rsi
+    pop rdx
+    pop rcx
+    pop rbx
+    pop rax
+
+    add rsp, 16
+    iretq
+
+section .data
+align 8
+isr_stub_table:
+    dq isr_stub_0, isr_stub_1, isr_stub_2, isr_stub_3
+    dq isr_stub_4, isr_stub_5, isr_stub_6, isr_stub_7
+    dq isr_stub_8, isr_stub_9, isr_stub_10, isr_stub_11
+    dq isr_stub_12, isr_stub_13, isr_stub_14, isr_stub_15
+    dq isr_stub_16, isr_stub_17, isr_stub_18, isr_stub_19
+    dq isr_stub_20, isr_stub_21, isr_stub_22, isr_stub_23
+    dq isr_stub_24, isr_stub_25, isr_stub_26, isr_stub_27
+    dq isr_stub_28, isr_stub_29, isr_stub_30, isr_stub_31
+    dq isr_stub_32, isr_stub_33, isr_stub_34, isr_stub_35
+    dq isr_stub_36, isr_stub_37, isr_stub_38, isr_stub_39
+    dq isr_stub_40, isr_stub_41, isr_stub_42, isr_stub_43
+    dq isr_stub_44, isr_stub_45, isr_stub_46, isr_stub_47