/	int ptrace ( int request , int child_id , int address , int data )

	.globl	_ptrace
_ptrace:
        pushl   %ebx
        pushl   %edi
	movl	12(%esp), %ebx
	movl	16(%esp), %edi
	movl	20(%esp), %edx
	movl	24(%esp), %ecx
	movw	$0x7f08,%ax
        int     $0x21
	popl	%edi
	popl	%ebx
	jecxz	1f
	movl	%ecx, _errno
1:
	ret