From d1ff7bcc91886626dc9060ec5fb67ee102ab7c1d Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Mon, 11 Mar 2024 21:30:31 -0400
Subject: usermode capable kernel with logging syscall

---
 arch/x86_64/int.S | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 arch/x86_64/int.S

(limited to 'arch/x86_64/int.S')

diff --git a/arch/x86_64/int.S b/arch/x86_64/int.S
new file mode 100644
index 0000000..96c62d9
--- /dev/null
+++ b/arch/x86_64/int.S
@@ -0,0 +1,131 @@
+.section .text
+.global x86_64_lidt
+.type x86_64_lidt @function
+x86_64_lidt:
+    lidt (%rdi)
+    retq
+
+.macro irq_preserve
+    pushq %rax
+    pushq %rbx
+    pushq %rcx
+    pushq %rdx
+    pushq %rsi
+    pushq %rdi
+    pushq %rbp
+    pushq %r8
+    pushq %r9
+    pushq %r10
+    pushq %r11
+    pushq %r12
+    pushq %r13
+    pushq %r14
+    pushq %r15
+.endm
+
+.macro irq_restore
+    popq %r15
+    popq %r14
+    popq %r13
+    popq %r12
+    popq %r11
+    popq %r10
+    popq %r9
+    popq %r8
+    popq %rbp
+    popq %rdi
+    popq %rsi
+    popq %rdx
+    popq %rcx
+    popq %rbx
+    popq %rax
+.endm
+
+.global irq_stub
+.type irq_stub @function
+irq_stub:
+    irq_preserve
+
+    movq %rsp, %rdi
+    cld
+
+    .extern irq_handle
+    call irq_handle
+    movq %rax, %rsp
+
+    irq_restore
+    addq $128, %rsp
+    iretq
+
+.extern __isr_err
+.extern __isr_num
+
+.macro isr_error num:req
+.type __isr\num @function
+isr\num:
+    subq $128, %rsp
+    pushq %rbx
+    movq 8(%rsp), %rbx
+    movq %rbx, __isr_err
+    popq %rbx
+    addq $8, %rsp
+    movq $\num, __isr_num
+    jmp irq_stub
+.endm
+
+.macro isr_noerr num:req
+.type __isr\num @function
+isr\num:
+    movq $\num, __isr_num
+    jmp irq_stub
+.endm
+
+isr_noerr 0
+isr_noerr 1
+isr_noerr 2
+isr_noerr 3
+isr_noerr 4
+isr_noerr 5
+isr_noerr 6
+isr_noerr 7
+isr_error 8
+isr_noerr 9
+isr_error 10
+isr_error 11
+isr_error 12
+isr_error 13
+isr_error 14
+isr_noerr 15
+isr_noerr 16
+isr_error 17
+isr_noerr 18
+isr_noerr 19
+isr_noerr 20
+isr_error 21
+
+.section .data
+.global __isr_stubs
+.type __isr_stubs @object
+__isr_stubs:
+    .quad isr0
+    .quad isr1
+    .quad isr2
+    .quad isr3
+    .quad isr4
+    .quad isr5
+    .quad isr6
+    .quad isr7
+    .quad isr8
+    .quad isr9
+    .quad isr10
+    .quad isr11
+    .quad isr12
+    .quad isr13
+    .quad isr14
+    .quad isr15
+    .quad isr16
+    .quad isr17
+    .quad isr18
+    .quad isr19
+    .quad isr20
+    .quad isr21
-- 
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