1 files changed, 127 insertions, 0 deletions
diff --git a/arch/x86_64/hal/idt_entries.s b/arch/x86_64/hal/idt_entries.s
new file mode 100644
index 0000000..204fa93
--- /dev/null
+++ b/arch/x86_64/hal/idt_entries.s
@@ -0,0 +1,127 @@
+.section .text
+.macro push_state
+    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 pop_state
+    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
+
+.macro swapgs_if_necessary
+    cmpq $0x08, 0x8(%rsp)
+    je 1f
+    swapgs
+1:
+.endm
+
+.extern __int_handles
+.type __isr_header @function
+__isr_header:
+    push_state
+    cld
+
+    movq %rsp, %rdi
+
+isr_break:
+    movq 0x78(%rdi), %rax
+    movq __int_handles(,%rax,8), %rbx
+    call %rbx
+
+    pop_state
+    addq $16, %rsp
+    swapgs_if_necessary
+    iretq
+.size __isr_header, . - __isr_header
+
+.macro defn_isr_err num:req
+.type __isr\num @function
+__isr\num:
+    swapgs_if_necessary
+    pushq $\num
+    jmp __isr_header
+.size __isr\num, . - __isr\num
+.endm
+
+.macro defn_isr num:req
+.type __isr\num @function
+__isr\num:
+    swapgs_if_necessary
+    pushq $0
+    pushq $\num
+    jmp __isr_header
+.size __isr\num, . - __isr\num
+.endm
+
+.macro decl_isr num:req
+.quad __isr\num
+.endm
+
+defn_isr 0
+defn_isr 1
+defn_isr 2
+defn_isr 3
+defn_isr 4
+defn_isr 5
+defn_isr 6
+defn_isr 7
+defn_isr_err 8
+defn_isr 9
+defn_isr_err 10
+defn_isr_err 11
+defn_isr_err 12
+defn_isr_err 13
+defn_isr_err 14
+defn_isr 15
+defn_isr 16
+defn_isr_err 17
+defn_isr 18
+defn_isr 19
+defn_isr 20
+defn_isr_err 21
+
+.altmacro
+.set i, 22
+.rept 48-22
+    defn_isr %i
+    .set i, i+1
+.endr
+
+.section .data
+
+.global __isrs
+.type __isrs @object
+__isrs:
+    .set i, 0
+    .rept 48
+        decl_isr %i
+        .set i, i+1
+    .endr
+.size __isrs, . - __isrs