You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.3 KiB
54 lines
1.3 KiB
#include <sched.h>
|
|
#include <signal.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/time.h>
|
|
#include <asm/unistd.h>
|
|
#include <asm/page.h>
|
|
#include "ptrace_user.h"
|
|
#include "skas.h"
|
|
#include "stub-data.h"
|
|
#include "uml-config.h"
|
|
#include "sysdep/stub.h"
|
|
#include "kern_constants.h"
|
|
|
|
/* This is in a separate file because it needs to be compiled with any
|
|
* extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
|
|
*
|
|
* Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize
|
|
* on some systems.
|
|
*/
|
|
|
|
void __attribute__ ((__section__ (".__syscall_stub")))
|
|
stub_clone_handler(void)
|
|
{
|
|
struct stub_data *data = (struct stub_data *) UML_CONFIG_STUB_DATA;
|
|
long err;
|
|
|
|
err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
|
|
UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE / 2 -
|
|
sizeof(void *));
|
|
if(err != 0)
|
|
goto out;
|
|
|
|
err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
|
|
if(err)
|
|
goto out;
|
|
|
|
err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
|
|
(long) &data->timer, 0);
|
|
if(err)
|
|
goto out;
|
|
|
|
remap_stack(data->fd, data->offset);
|
|
goto done;
|
|
|
|
out:
|
|
/* save current result.
|
|
* Parent: pid;
|
|
* child: retcode of mmap already saved and it jumps around this
|
|
* assignment
|
|
*/
|
|
data->err = err;
|
|
done:
|
|
trap_myself();
|
|
}
|
|
|