Kernel/LibC: Add bareboness signals

You can now call raise() to raise a signal. Signal handlers are not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
parent a1db032ba9
commit c2cf98e32f
14 changed files with 126 additions and 3 deletions
--- a/kernel/arch/x86_64/Signal.S
+++ b/kernel/arch/x86_64/Signal.S
@@ -0,0 +1,51 @@
+.section .userspace, "aw"
+
+.global signal_trampoline
+signal_trampoline:
+	pushq %rax
+	pushq %rbx
+	pushq %rcx
+	pushq %rdx
+	pushq %rbp
+	pushq %rdi
+	pushq %rsi
+	pushq %r8
+	pushq %r9
+	pushq %r10
+	pushq %r11
+	pushq %r12
+	pushq %r13
+	pushq %r14
+	pushq %r15
+
+	xchgw %bx, %bx
+
+	movq 128(%rsp), %rdi
+	movq 120(%rsp), %rax
+	call *%rax
+
+	popq %r15
+	popq %r14
+	popq %r13
+	popq %r12
+	popq %r11
+	popq %r10
+	popq %r9
+	popq %r8
+	popq %rsi
+	popq %rdi
+	popq %rbp
+	popq %rdx
+	popq %rcx
+	popq %rbx
+	popq %rax
+
+	addq $16, %rsp
+
+	ret
+
+.global test_signal
+test_signal:
+	movq $99, %rax
+	int $0x80
+	ret