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- #include <errno.h>
- #include <sched.h>
- #include <sys/syscall.h>
- int clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg, ...)
- {
- register unsigned long rval __asm__ ("r2") = -EINVAL;
- if (fn && child_stack) {
- register unsigned long syscall __asm__ ("r3");
- register unsigned long arg0 __asm__ ("r4");
- register unsigned long arg1 __asm__ ("r5");
-
- rval = TRAP_ID_SYSCALL;
- syscall = __NR_clone;
- arg0 = flags;
- arg1 = (unsigned long)child_stack;
- __asm__ __volatile__ ("trap "
- : "=r" (rval), "=r" (syscall)
- : "0" (rval),"1" (syscall), "r" (arg0), "r" (arg1)
- );
- if (rval == 0) {
-
- arg0 = (*fn) (arg);
- syscall = __NR_exit;
- __asm__ __volatile__ ("trap "
- : "=r" (rval), "=r" (syscall)
- : "1" (syscall), "r" (arg0));
- }
- }
- __syscall_return (int, rval);
- }
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