Fix stack alignment

2025-11-24 17:04:33 +01:00
parent 2faad79559
commit 3f3795df3c
3 changed files with 7 additions and 3 deletions
--- a/kernel/intr/intr0.S
+++ b/kernel/intr/intr0.S
@ -66,7 +66,9 @@
  _push_regs
  cld
  movq %rsp, %rdi
+  sub $0x8, %rsp
  call intr_handleintr
+  add $0x8, %rsp
  _pop_regs
  add $0x10, %rsp
  iretq
--- a/kernel/proc/switch.S
+++ b/kernel/proc/switch.S
@ -2,10 +2,7 @@

 .global proc_switch
 proc_switch:
-  testq %rsi, %rsi
-  je 1f
  movq %rsi, %cr3
-1:
  mov %rdi, %rsp
  _pop_regs
  add $0x10, %rsp
--- a/ulib/_start.S
+++ b/ulib/_start.S
@ -4,4 +4,9 @@

 .global _start
 _start:
+  xor %rbp, %rbp
+  mov %rsp, %rbp
+  and $-0x10, %rsp
+  sub $0x8, %rsp
+
  call _premain