Implement fast syscall/sysret for sytem calls

2019-03-13 23:51:29 -07:00
parent 97e8f2c69a
commit f7558e3d18
9 changed files with 77 additions and 21 deletions
--- a/src/kernel/push_all.inc
+++ b/src/kernel/push_all.inc
@@ -44,4 +44,13 @@
 	pop rax
 %endmacro

+%macro check_swap_gs 0
+	mov rax, [rsp+0x90]
+	and rax, 0x03 ; mask out the RPL
+	cmp rax, 0x03
+	jne %%noswapgs
+	swapgs
+%%noswapgs:
+%endmacro
+
 ; vim: ft=asm