From 584923445ca039f7ac31dfea46b129fb7a80d836 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sun, 12 Jul 2020 19:49:55 +0200
Subject: [PATCH] UserspaceEmulator: "Add" a couple of syscalls

This patch adds gettid() and stubs out pledge() and unveil() for now.
---
 DevTools/UserspaceEmulator/Emulator.cpp | 21 +++++++++++++++++++++
 DevTools/UserspaceEmulator/Emulator.h   |  3 +++
 2 files changed, 24 insertions(+)

diff --git a/DevTools/UserspaceEmulator/Emulator.cpp b/DevTools/UserspaceEmulator/Emulator.cpp
index 1968af7e50..fcea894e6e 100644
--- a/DevTools/UserspaceEmulator/Emulator.cpp
+++ b/DevTools/UserspaceEmulator/Emulator.cpp
@@ -185,6 +185,12 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
 
     printf("Syscall: %s (%x)\n", Syscall::to_string((Syscall::Function)function), function);
     switch (function) {
+    case SC_gettid:
+        return virt$gettid();
+    case SC_pledge:
+        return virt$pledge(arg1);
+    case SC_unveil:
+        return virt$unveil(arg1);
     case SC_getuid:
         return virt$getuid();
     case SC_exit:
@@ -196,6 +202,21 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
     }
 }
 
+u32 Emulator::virt$gettid()
+{
+    return gettid();
+}
+
+u32 Emulator::virt$pledge(u32)
+{
+    return 0;
+}
+
+u32 Emulator::virt$unveil(u32)
+{
+    return 0;
+}
+
 uid_t Emulator::virt$getuid()
 {
     return getuid();
diff --git a/DevTools/UserspaceEmulator/Emulator.h b/DevTools/UserspaceEmulator/Emulator.h
index 5d07ba43f0..1f9d9011cd 100644
--- a/DevTools/UserspaceEmulator/Emulator.h
+++ b/DevTools/UserspaceEmulator/Emulator.h
@@ -54,6 +54,9 @@ private:
 
     void setup_stack();
 
+    u32 virt$gettid();
+    u32 virt$unveil(u32);
+    u32 virt$pledge(u32);
     uid_t virt$getuid();
     void virt$exit(int);