5 #include <asm/unistd.h>
7 #include "ptrace_user.h"
10 #include "uml-config.h"
11 #include "sysdep/stub.h"
12 #include "kern_constants.h"
14 /* This is in a separate file because it needs to be compiled with any
15 * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
17 * Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize
21 #define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field)
23 void __attribute__ ((__section__ (".__syscall_stub")))
24 stub_clone_handler(void)
28 err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
29 UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE / 2 -
34 err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
38 err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
39 (long) &STUB_DATA(timer), 0);
43 err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA,
44 UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
45 MAP_FIXED | MAP_SHARED, STUB_DATA(fd),
48 /* save current result. Parent: pid; child: retcode of mmap */