5 #include <asm/unistd.h>
7 #include "ptrace_user.h"
10 #include "uml-config.h"
11 #include "sysdep/stub.h"
13 /* This is in a separate file because it needs to be compiled with any
14 * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
17 #define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field)
19 void __attribute__ ((__section__ (".__syscall_stub")))
20 stub_clone_handler(void)
24 err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
25 UML_CONFIG_STUB_DATA + PAGE_SIZE / 2 -
30 err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
34 err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
35 (long) &STUB_DATA(timer), 0);
39 err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, PAGE_SIZE,
40 PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED,
41 STUB_DATA(fd), STUB_DATA(offset));
43 /* save current result. Parent: pid; child: retcode of mmap */