From 24b850e55e1dd8c36a4b2e946b941422db17abb5 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 17 Jul 2025 00:24:02 -0400
Subject: kernel/amd64: Set up seperate syscall stack

It is a good idea to have a completely different stack during syscalls.
This commit implements a TSS IST entry for syscalls.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/arch/amd64/intr.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'sys/include/arch/amd64')

diff --git a/sys/include/arch/amd64/intr.h b/sys/include/arch/amd64/intr.h
index 1877d20..3870f18 100644
--- a/sys/include/arch/amd64/intr.h
+++ b/sys/include/arch/amd64/intr.h
@@ -35,6 +35,7 @@
 #define IST_SCHED   1U
 #define IST_HW_IRQ  2U
 #define IST_SW_INT  3U
+#define IST_SYSCALL 4U
 
 /* Upper 4 bits of interrupt vector */
 #define IPL_SHIFT 4
-- 
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