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#include <errno.h>

#include <sys/ptrace.h>

#include <sys/syscall.h>

int

ptrace(int request, int pid, int addr, int data)

{

        long ret;

        long res;

        if (request > 0 && request < 4) (long *)data = &ret;

        __asm__ volatile ("movel %1,%/d0\n\t"

                          "movel %2,%/d1\n\t"

                          "movel %3,%/d2\n\t"

                          "movel %4,%/d3\n\t"

                          "movel %5,%/d4\n\t"

                          "trap  #0\n\t"

                          "movel %/d0,%0"

                :"=g" (res)

                :"i" (SYS_ptrace), "g" (request), "g" (pid),

                 "g" (addr), "g" (data) : "%d0", "%d1", "%d2", "%d3", "%d4");

        if (res >= 0) {

                if (request > 0 && request < 4) {

                        errno = 0;

                        return (ret);

                }

                return (int) res;

        }

        errno = -res;

        return -1;

}