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-rw-r--r--arch/um/kernel/skas/clone.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c
index cb37ce9124a6..47b812b3bca8 100644
--- a/arch/um/kernel/skas/clone.c
+++ b/arch/um/kernel/skas/clone.c
@@ -18,11 +18,10 @@
18 * on some systems. 18 * on some systems.
19 */ 19 */
20 20
21#define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field)
22
23void __attribute__ ((__section__ (".__syscall_stub"))) 21void __attribute__ ((__section__ (".__syscall_stub")))
24stub_clone_handler(void) 22stub_clone_handler(void)
25{ 23{
24 struct stub_data *data = (struct stub_data *) UML_CONFIG_STUB_DATA;
26 long err; 25 long err;
27 26
28 err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, 27 err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
@@ -35,17 +34,21 @@ stub_clone_handler(void)
35 if(err) 34 if(err)
36 goto out; 35 goto out;
37 36
38 err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL, 37 err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
39 (long) &STUB_DATA(timer), 0); 38 (long) &data->timer, 0);
40 if(err) 39 if(err)
41 goto out; 40 goto out;
42 41
43 err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, 42 remap_stack(data->fd, data->offset);
44 UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, 43 goto done;
45 MAP_FIXED | MAP_SHARED, STUB_DATA(fd), 44
46 STUB_DATA(offset));
47 out: 45 out:
48 /* save current result. Parent: pid; child: retcode of mmap */ 46 /* save current result.
49 STUB_DATA(err) = err; 47 * Parent: pid;
48 * child: retcode of mmap already saved and it jumps around this
49 * assignment
50 */
51 data->err = err;
52 done:
50 trap_myself(); 53 trap_myself();
51} 54}