diff options
Diffstat (limited to 'arch/um/kernel/skas/clone.c')
| -rw-r--r-- | arch/um/kernel/skas/clone.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c index bfb70c456b30..592cdb138441 100644 --- a/arch/um/kernel/skas/clone.c +++ b/arch/um/kernel/skas/clone.c @@ -24,29 +24,25 @@ void __attribute__ ((__section__ (".__syscall_stub"))) stub_clone_handler(void) { - struct stub_data *data = (struct stub_data *) STUB_DATA; + int stack; + struct stub_data *data = (void *) ((unsigned long)&stack & ~(UM_KERN_PAGE_SIZE - 1)); long err; err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, - STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *)); - if (err != 0) - goto out; + (unsigned long)data + UM_KERN_PAGE_SIZE / 2 - sizeof(void *)); + if (err) { + data->parent_err = err; + goto done; + } err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0); - if (err) - goto out; + if (err) { + data->child_err = err; + goto done; + } - remap_stack(data->fd, data->offset); - goto done; + remap_stack_and_trap(); - out: - /* - * save current result. - * Parent: pid; - * child: retcode of mmap already saved and it jumps around this - * assignment - */ - data->err = err; done: trap_myself(); } |