#include <unistd.h> #include <sys/types.h> #include <errno.h> #include <sys/syscall.h> #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); }