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-rw-r--r--arch/um/kernel/skas/clone.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c
index 4dc55f1..39c0d71 100644
--- a/arch/um/kernel/skas/clone.c
+++ b/arch/um/kernel/skas/clone.c
@@ -13,11 +13,13 @@
/* This is in a separate file because it needs to be compiled with any
* extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
*/
+
+#define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field)
+
void __attribute__ ((__section__ (".__syscall_stub")))
stub_clone_handler(void)
{
long err;
- struct stub_data *from = (struct stub_data *) UML_CONFIG_STUB_DATA;
err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
UML_CONFIG_STUB_DATA + PAGE_SIZE / 2 -
@@ -30,15 +32,15 @@ stub_clone_handler(void)
goto out;
err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
- (long) &from->timer, 0);
+ (long) &STUB_DATA(timer), 0);
if(err)
goto out;
err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, PAGE_SIZE,
PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED,
- from->fd, from->offset);
+ STUB_DATA(fd), STUB_DATA(offset));
out:
/* save current result. Parent: pid; child: retcode of mmap */
- from->err = err;
+ STUB_DATA(err) = err;
trap_myself();
}
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