x86_64: signal trampoline code

lux-operating-system · Nov 20, 2024 · 22fe384 · 22fe384
1 parent c2d873d
commit 22fe384
Showing 1 changed file with 25 additions and 0 deletions.
diff --git a/src/platform/x86_64/ipc/sigstub.asm b/src/platform/x86_64/ipc/sigstub.asm
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+
+; lux - a lightweight unix-like operating system
+; Omar Elghoul, 2024
+
+[bits 64]
+
+; Signal Trampoline Code
+; this simply invokes the sigreturn() system call to allow the kernel to
+; restore the state of the thread before the signal was raised
+
+SYSCALL_SIGRETURN           equ 49
+
+section .data
+
+global sigstub
+align 16
+sigstub:
+    mov rax, SYSCALL_SIGRETURN
+    syscall
+
+sigstubEnd:
+
+global sigstubSize
+align 16
+sigstubSize:                dq sigstubEnd - sigstub