diff options
Diffstat (limited to 'arch/um/kernel/skas')
-rw-r--r-- | arch/um/kernel/skas/clone.c | 23 |
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 | |||
23 | void __attribute__ ((__section__ (".__syscall_stub"))) | 21 | void __attribute__ ((__section__ (".__syscall_stub"))) |
24 | stub_clone_handler(void) | 22 | stub_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 | } |