-#include <sched.h>
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
#include <signal.h>
-#include <sys/mman.h>
-#include <sys/time.h>
+#include <sched.h>
#include <asm/unistd.h>
-#include <asm/page.h>
+#include <sys/time.h>
+#include "as-layout.h"
+#include "kern_constants.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
+/*
+ * 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.
*/
-#define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field)
-
void __attribute__ ((__section__ (".__syscall_stub")))
stub_clone_handler(void)
{
+ struct stub_data *data = (struct stub_data *) 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)
+ 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)
+ if (err)
goto out;
err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
- (long) &STUB_DATA(timer), 0);
- if(err)
+ (long) &data->timer, 0);
+ if (err)
goto out;
- err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA,
- UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
- MAP_FIXED | MAP_SHARED, STUB_DATA(fd),
- STUB_DATA(offset));
+ remap_stack(data->fd, data->offset);
+ goto done;
+
out:
- /* save current result. Parent: pid; child: retcode of mmap */
- STUB_DATA(err) = err;
+ /*
+ * save current result.
+ * Parent: pid;
+ * child: retcode of mmap already saved and it jumps around this
+ * assignment
+ */
+ data->err = err;
+ done:
trap_myself();
}