UserspaceEmulator: Add support for SC_abort syscall

Userland/DevTools/UserspaceEmulator/Emulator.h

@@ -163,6 +163,7 @@ private:
     int virt$connect(int sockfd, FlatPtr address, socklen_t address_size);
     int virt$shutdown(int sockfd, int how);
     void virt$sync();
+    void virt$abort();
     void virt$exit(int);
     ssize_t virt$getrandom(FlatPtr buffer, size_t buffer_size, unsigned int flags);
     int virt$chdir(FlatPtr, size_t);

Userland/DevTools/UserspaceEmulator/Emulator_syscalls.cpp

@@ -219,6 +219,9 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
     case SC_sync:
         virt$sync();
         return 0;
+    case SC_abort:
+        virt$abort();
+        return 0;
     case SC_exit:
         virt$exit((int)arg1);
         return 0;
@@ -1027,6 +1030,14 @@ void Emulator::virt$sync()
     syscall(SC_sync);
 }
 
+void Emulator::virt$abort()
+{
+    reportln("\n=={}==  \033[33;1mSyscall: abort\033[0m, shutting down!", getpid());
+    m_exit_status = 127;
+    m_shutdown = true;
+    dump_backtrace();
+}
+
 void Emulator::virt$exit(int status)
 {
     reportln("\n=={}==  \033[33;1mSyscall: exit({})\033[0m, shutting down!", getpid(), status);