kernel: user interrupts

1 files changed, 20 insertions, 0 deletions

diff --git a/src/user/lib/intr.s b/src/user/lib/intr.s
new file mode 100644
index 0000000..008387d
--- /dev/null
+++ b/src/user/lib/intr.s
@@ -0,0 +1,20 @@
+.section .text
+.global intr_trampoline
+.type intr_trampoline, @function
+intr_trampoline:
+	push %rax
+	push %rdx
+	call *_intr(%rip)
+	pop %rdx
+	pop %rax
+	pop tmprip(%rip)
+	pop %rsp
+	jmp *tmprip(%rip)
+
+.section .bss
+tmprip:
+	.skip 8
+
+.global _intr
+_intr:
+	.skip 8