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#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <sys/syscall.h>
libc_hidden_proto(vfork)
#define __syscall_clobbers \
"r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
#define __syscall_return(type) \
return (__sc_err & 0x10000000 ? errno = __sc_ret, __sc_ret = -1 : 0), \
(type) __sc_ret
pid_t vfork(void)
{
unsigned long __sc_ret, __sc_err;
register unsigned long __sc_0 __asm__ ("r0");
register unsigned long __sc_3 __asm__ ("r3");
#if 0
/* Sigh. The vfork system call on powerpc
* seems to be completely broken. So just
* use fork instead */
__sc_0 = __NR_vfork;
__asm__ __volatile__
("sc \n\t"
"mfcr %1 "
: "=&r" (__sc_3), "=&r" (__sc_0)
: "0" (__sc_3), "1" (__sc_0)
: __syscall_clobbers);
__sc_ret = __sc_3;
__sc_err = __sc_0;
if((__sc_err & 0x10000000) && (__sc_ret == ENOSYS))
#endif
{
__sc_0 = __NR_fork;
__asm__ __volatile__
("sc \n\t"
"mfcr %1 "
: "=&r" (__sc_3), "=&r" (__sc_0)
: "0" (__sc_3), "1" (__sc_0)
: __syscall_clobbers);
__sc_ret = __sc_3;
__sc_err = __sc_0;
}
__syscall_return (pid_t);
}
libc_hidden_def(vfork)
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