Kernel: Save fpu state and flags in signal handler

This was causing some weird crashes :D
2025-06-27 21:51:13 +03:00
parent 9e895e5286
commit f73bb242f3
3 changed files with 15 additions and 4 deletions
--- a/kernel/arch/i686/Signal.S
+++ b/kernel/arch/i686/Signal.S
@@ -7,9 +7,6 @@

 .global signal_trampoline
 signal_trampoline:
-	pushl %ebp
-	movl %esp, %ebp
-
 	pusha

 	movl 40(%esp), %edi
@@ -19,16 +16,22 @@ signal_trampoline:
 	movl %esp, %ebp
 	andl $-16, %esp

+	subl $512, %esp
+	fxsave (%esp)
+
 	subl $12, %esp
 	pushl %edi
 	call *%eax
 	addl $16, %esp

+	fxrstor (%esp)
+	addl $512, %esp
+
 	// restore stack
 	movl %ebp, %esp
 	popa

-	leave
 	addl $8, %esp
+	popf

 	ret