From 975a9ec96e282e437ccc1bdf1e660dcbf4542791 Mon Sep 17 00:00:00 2001
From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com>
Date: Fri, 10 May 2024 01:44:59 -0400
Subject: Added GDT and basic IDT as well as a bitmap drawing function

---
 kernel/arch/x86_64/isr.asm | 312 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 312 insertions(+)
 create mode 100644 kernel/arch/x86_64/isr.asm

(limited to 'kernel/arch/x86_64/isr.asm')

diff --git a/kernel/arch/x86_64/isr.asm b/kernel/arch/x86_64/isr.asm
new file mode 100644
index 0000000..8f9d6d6
--- /dev/null
+++ b/kernel/arch/x86_64/isr.asm
@@ -0,0 +1,312 @@
+; The assembly part of the interrupt service routines
+
+global isr0
+global isr1
+global isr2
+global isr3
+global isr4
+global isr5
+global isr6
+global isr7
+global isr8
+global isr9
+global isr10
+global isr11
+global isr12
+global isr13
+global isr14
+global isr15
+global isr16
+global isr17
+global isr18
+global isr19
+global isr20
+global isr21
+global isr22
+global isr23
+global isr24
+global isr25
+global isr26
+global isr27
+global isr28
+global isr29
+global isr30
+global isr31
+global isr32
+
+; macros to make up for the lack of pusha/popa
+%macro pushregs 0
+    push rax
+    push rdi
+    push rsi
+    push rdx
+    push rcx
+    push r8
+    push r9
+    push r10
+    push r11
+%endmacro
+
+%macro popregs 0
+    pop r11
+    pop r10
+    pop r9
+    pop r8
+    pop rcx
+    pop rdx
+    pop rsi
+    pop rdi
+    pop rax
+%endmacro
+
+%macro halt 0
+    .loop
+        hlt
+        jmp .loop
+%endmacro
+
+section .text
+align 4
+
+extern exception_handler
+
+isr0:
+    xchg bx, bx
+    pushregs
+    mov rdi, 0
+    call exception_handler
+    halta
+    popregs
+    iretq
+
+isr1:
+    pushregs
+    mov rdi, 1
+    call exception_handler
+    xchg bx, bx
+    popregs
+    iretq
+
+isr2:
+    pushregs
+    mov rdi, 2
+    call exception_handler
+    popregs
+    iretq
+
+isr3:
+    pushregs
+    mov rdi, 3
+    call exception_handler
+    popregs
+    iretq
+
+isr4:
+    pushregs
+    mov rdi, 4
+    call exception_handler
+    popregs
+    iretq
+
+isr5:
+    pushregs
+    mov rdi, 5
+    call exception_handler
+    popregs
+    iretq
+
+isr6:
+    pushregs
+    mov rdi, 6
+    call exception_handler
+    halt
+    popregs
+    iretq
+
+isr7:
+    pushregs
+    mov rdi, 7
+    call exception_handler
+    popregs
+    iretq
+
+isr8:
+    pushregs
+    mov rdi, 8
+    call exception_handler
+    halt
+    popregs
+    iretq
+
+isr9:
+    pushregs
+    mov rdi, 9
+    call exception_handler
+    popregs
+    iretq
+
+isr10:
+    pushregs
+    mov rdi, 10
+    call exception_handler
+    popregs
+    ; will deal with error codes later. need to be removed from the stack first
+    ; not sure if this works right yet
+    sub esp, 8
+    iretq
+
+isr11:
+    pushregs
+    mov rdi, 11
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr12:
+    pushregs
+    mov rdi, 12
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr13:
+    pushregs
+    mov rdi, 13
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr14:
+    pushregs
+    mov rdi, 14
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr15:
+    pushregs
+    mov rdi, 15
+    call exception_handler
+    popregs
+    iretq
+
+isr16:
+    pushregs
+    mov rdi, 16
+    call exception_handler
+    popregs
+    iretq
+
+isr17:
+    pushregs
+    mov rdi, 17
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr18:
+    pushregs
+    mov rdi, 18
+    call exception_handler
+    halt
+    popregs
+    iretq
+
+isr19:
+    pushregs
+    mov rdi, 19
+    call exception_handler
+    popregs
+    iretq
+
+isr20:
+    pushregs
+    mov rdi, 20
+    call exception_handler
+    popregs
+    iretq
+
+isr21:
+    pushregs
+    mov rdi, 21
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr22:
+    pushregs
+    mov rdi, 22
+    call exception_handler
+    popregs
+    iretq
+
+isr23:
+    pushregs
+    mov rdi, 23
+    call exception_handler
+    popregs
+    iretq
+
+isr24:
+    pushregs
+    mov rdi, 24
+    call exception_handler
+    popregs
+    iretq
+
+isr25:
+    pushregs
+    mov rdi, 25
+    call exception_handler
+    popregs
+    iretq
+
+isr26:
+    pushregs
+    mov rdi, 26
+    call exception_handler
+    popregs
+    iretq
+
+isr27:
+    pushregs
+    mov rdi, 27
+    call exception_handler
+    popregs
+    iretq
+
+isr28:
+    pushregs
+    mov rdi, 28
+    call exception_handler
+    popregs
+    iretq
+
+isr29:
+    pushregs
+    mov rdi, 29
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr30:
+    pushregs
+    mov rdi, 30
+    call exception_handler
+    popregs
+    sub esp, 8
+    iretq
+
+isr31:
+    pushregs
+    mov rdi, 31
+    call exception_handler
+    popregs
+    iretq
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2