diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/clone.S | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S index 992cb2f10f..117411824f 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S @@ -25,32 +25,40 @@ #define _ERRNO_H 1 #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); */ +/* 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 */ + lgr %r0,%r5 /* move *arg out of the way */ ltgr %r1,%r2 /* no NULL function pointers */ lghi %r2,-EINVAL - jz SYSCALL_ERROR_LABEL + jgz SYSCALL_ERROR_LABEL ltgr %r3,%r3 /* no NULL stack pointers */ - jz SYSCALL_ERROR_LABEL - /* move child_stack and flags, then call SVC */ + jgz SYSCALL_ERROR_LABEL + /* set up registers, then call SVC */ lgr %r2,%r3 lgr %r3,%r4 + lmg %r4,%r5,160(%r15) svc SYS_ify(clone) ltgr %r2,%r2 /* check return code */ - jm SYSCALL_ERROR_LABEL + jgm SYSCALL_ERROR_LABEL jz thread_start br %r14 thread_start: - /* fn is in gpr 1, arg in gpr 5 */ - lgr %r2,%r5 /* set first parameter to void *arg */ - sgr %r11,%r11 /* terminate the stack frame */ + /* fn is in gpr 1, arg in gpr 0 */ + lgr %r2,%r0 /* set first parameter to void *arg */ aghi %r15,-160 /* make room on the stack for the save area */ + xc 0(8,%r15),0(%r15) basr %r14,%r1 /* jump to fn */ #ifdef PIC - larl %r12,_GLOBAL_OFFSET_TABLE_ -#endif jg _exit@PLT /* branch to _exit -> thread termination */ +#else + jg _exit /* branch to _exit -> thread termination */ +#endif PSEUDO_END (__clone) weak_alias (__clone, clone) |