diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-32/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/clone.S | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S index 23fb464..91c362a 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S @@ -25,29 +25,32 @@ #include <bits/errno.h> /* int __clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, - void *tls, pid_t *parent_tid, pid_t *child_tid); */ + pid_t *parent_tid, void *tls, pid_t *child_tid); */ /* sys_clone (void *child_stack, unsigned long flags, pid_t *parent_tid, pid_t *child_tid, void *tls); */ .text ENTRY(__clone) - /* Sanity check arguments & move registers */ + st %r6,24(%r15) /* store %r6 to save area */ lr %r0,%r5 /* move *arg out of the way */ - ltr %r1,%r2 /* no NULL function pointers */ - lhi %r2,-EINVAL - jz SYSCALL_ERROR_LABEL - ltr %r3,%r3 /* no NULL stack pointers */ - jz SYSCALL_ERROR_LABEL - /* set up registers, then call SVC */ - lr %r2,%r3 - lr %r3,%r4 - lm %r4,%r5,96(%r15) - svc SYS_ify(clone) - ltr %r2,%r2 /* check return code */ - jm SYSCALL_ERROR_LABEL - jz thread_start - br %r14 - + ltr %r1,%r2 /* check fn and move to %r1 */ + jz error /* no NULL function pointers */ + ltr %r2,%r3 /* check child_stack and move to %r2 */ + jz error /* no NULL stack pointers */ + lr %r3,%r4 /* move flags to %r3 */ + lr %r4,%r6 /* move parent_tid to %r4 */ + l %r5,100(%r15) /* load child_tid from stack */ + l %r6,96(%r15) /* load tls from stack */ + svc SYS_ify(clone) + l %r6,24(%r15) /* restore %r6 */ + ltr %r2,%r2 /* check return code */ + jm SYSCALL_ERROR_LABEL + jz thread_start + br %r14 +error: + lhi %r2,-EINVAL + j SYSCALL_ERROR_LABEL + thread_start: /* fn is in gpr 1, arg in gpr 0 */ lr %r2,%r0 /* set first parameter to void *arg */ |