From 8c846c9ca5e2f1d4742311b099752f4f87f9d327 Mon Sep 17 00:00:00 2001
From: DualFroz <me@dualfroz.com>
Date: Mon, 24 Aug 2026 23:06:40 +0200
Subject: [PATCH] feat(cpu): add per-vector interrupt stub assembly

---
 src/isrStubs.S | 170 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 src/isrStubs.S

diff --git a/src/isrStubs.S b/src/isrStubs.S
new file mode 100644
index 0000000..7111e61
--- /dev/null
+++ b/src/isrStubs.S
@@ -0,0 +1,170 @@
+.section .text
+.code64
+.extern isrDispatch
+
+.macro isrNoError num
+.global isrStub\num
+isrStub\num:
+    pushq $0
+    pushq $\num
+    jmp isrCommon
+.endm
+
+.macro isrWithError num
+.global isrStub\num
+isrStub\num:
+    pushq $\num
+    jmp isrCommon
+.endm
+
+isrNoError 0
+isrNoError 1
+isrNoError 2
+isrNoError 3
+isrNoError 4
+isrNoError 5
+isrNoError 6
+isrNoError 7
+isrWithError 8
+isrNoError 9
+isrWithError 10
+isrWithError 11
+isrWithError 12
+isrWithError 13
+isrWithError 14
+isrNoError 15
+isrNoError 16
+isrWithError 17
+isrNoError 18
+isrNoError 19
+isrNoError 20
+isrWithError 21
+isrNoError 22
+isrNoError 23
+isrNoError 24
+isrNoError 25
+isrNoError 26
+isrNoError 27
+isrNoError 28
+isrNoError 29
+isrNoError 30
+isrNoError 31
+
+isrNoError 32
+isrNoError 33
+isrNoError 34
+isrNoError 35
+isrNoError 36
+isrNoError 37
+isrNoError 38
+isrNoError 39
+isrNoError 40
+isrNoError 41
+isrNoError 42
+isrNoError 43
+isrNoError 44
+isrNoError 45
+isrNoError 46
+isrNoError 47
+
+.global isrStub128
+isrStub128:
+    pushq $0
+    pushq $128
+    jmp isrCommon
+
+isrCommon:
+    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
+
+    cld
+    movq %rsp, %rdi
+    call isrDispatch
+    movq %rax, %rsp
+
+    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
+
+    addq $16, %rsp
+    iretq
+
+.section .rodata
+.align 8
+.global isrStubTable
+isrStubTable:
+    .quad isrStub0
+    .quad isrStub1
+    .quad isrStub2
+    .quad isrStub3
+    .quad isrStub4
+    .quad isrStub5
+    .quad isrStub6
+    .quad isrStub7
+    .quad isrStub8
+    .quad isrStub9
+    .quad isrStub10
+    .quad isrStub11
+    .quad isrStub12
+    .quad isrStub13
+    .quad isrStub14
+    .quad isrStub15
+    .quad isrStub16
+    .quad isrStub17
+    .quad isrStub18
+    .quad isrStub19
+    .quad isrStub20
+    .quad isrStub21
+    .quad isrStub22
+    .quad isrStub23
+    .quad isrStub24
+    .quad isrStub25
+    .quad isrStub26
+    .quad isrStub27
+    .quad isrStub28
+    .quad isrStub29
+    .quad isrStub30
+    .quad isrStub31
+    .quad isrStub32
+    .quad isrStub33
+    .quad isrStub34
+    .quad isrStub35
+    .quad isrStub36
+    .quad isrStub37
+    .quad isrStub38
+    .quad isrStub39
+    .quad isrStub40
+    .quad isrStub41
+    .quad isrStub42
+    .quad isrStub43
+    .quad isrStub44
+    .quad isrStub45
+    .quad isrStub46
+    .quad isrStub47
+
+.section .note.GNU-stack, "", @progbits