>Number:         15945
>Category:       kern
>Synopsis:       PT_IO
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 17 06:31:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Love
>Release:        NetBSD 1.5ZB
>Organization:
	Stacken Computer Club
>Environment:
System: NetBSD nutcracker.stacken.kth.se 1.5ZB NetBSD 1.5ZB (NUTCRACKER) #7: Sun Mar 17 15:01:14 CET 2002 lha@nutcracker.stacken.kth.se:/usr/src/sys/arch/i386/compile/NUTCRACKER i386
Architecture: i386
Machine: i386
>Description:

	Artur Grabowski <art@blahonga.org>, described a more generic
	pthread API for reading/writing to a process on
	<bsd-api-discuss@wasabisystems.com>.

>How-To-Repeat:

	Try use use pmdb and find PT_IO missing.

>Fix:

	I just adapeded the Artur's patch (including the changes
	proposed to bsd-api-discuss list) to netbsd.

Index: sys/ptrace.h
===================================================================
RCS file: /sources/netbsd/NetBSD-cvs/syssrc/sys/sys/ptrace.h,v
retrieving revision 1.23
diff -u -r1.23 ptrace.h
--- sys/ptrace.h	2001/12/05 00:58:06	1.23
+++ sys/ptrace.h	2002/03/17 13:55:21
@@ -1,4 +1,4 @@
-/*	$NetBSD: ptrace.h,v 1.22 2001/06/13 16:06:27 nathanw Exp $	*/
+/*	$NetBSD: ptrace.h,v 1.23 2001/12/05 00:58:06 thorpej Exp $	*/
 
 /*-
  * Copyright (c) 1984, 1993
@@ -47,6 +47,22 @@
 #define	PT_KILL		8	/* kill the child process */
 #define	PT_ATTACH	9	/* attach to running process */
 #define	PT_DETACH	10	/* detach from running process */
+#define PT_IO		11	/* do I/O to/from the stopped process. */
+
+struct ptrace_io_desc {
+	int		 piod_op;	/* I/O operation */
+	void		*piod_offs;	/* child offset */
+	void		*piod_addr;	/* parent offset */
+	size_t		 piod_len;	/* request length */
+};
+
+/*
+ * Operations in piod_op.
+ */
+#define PIOD_READ_D	1	/* Read from D space */
+#define PIOD_WRITE_D	2	/* Write to D space */
+#define PIOD_READ_I	3	/* Read from I space */
+#define PIOD_WRITE_I	4	/* Write to I space */
 
 #define	PT_FIRSTMACH	32	/* for machine-specific requests */
 #include <machine/ptrace.h>	/* machine-specific requests, if any */
Index: kern/sys_process.c
===================================================================
RCS file: /sources/netbsd/NetBSD-cvs/syssrc/sys/kern/sys_process.c,v
retrieving revision 1.72
diff -u -r1.72 sys_process.c
--- kern/sys_process.c	2002/01/11 21:16:28	1.72
+++ kern/sys_process.c	2002/03/17 14:00:58
@@ -95,6 +95,7 @@
 	struct proc *t;				/* target process */
 	struct uio uio;
 	struct iovec iov;
+	struct ptrace_io_desc piod;
 	int s, error, write, tmp;
 
 	/* "A foolish consistency..." XXX */
@@ -168,6 +169,7 @@
 	case  PT_WRITE_I:
 	case  PT_WRITE_D:
 	case  PT_CONTINUE:
+	case  PT_IO:
 	case  PT_KILL:
 	case  PT_DETACH:
 #ifdef PT_STEP
@@ -255,6 +257,35 @@
 		error = procfs_domem(p, t, NULL, &uio);
 		if (!write)
 			*retval = tmp;
+		return (error);
+		
+	case  PT_IO:
+		error = copyin(SCARG(uap, addr), &piod, sizeof(piod));
+		if (error)
+			return (error);
+		iov.iov_base = piod.piod_addr;
+		iov.iov_len = piod.piod_len;
+		uio.uio_iov = &iov;
+		uio.uio_iovcnt = 1;
+		uio.uio_offset = (off_t)(long)piod.piod_offs;
+		uio.uio_resid = piod.piod_len;
+		uio.uio_segflg = UIO_USERSPACE;
+		uio.uio_procp = p;
+		switch (piod.piod_op) {
+		case PIOD_READ_D:
+		case PIOD_READ_I:
+			uio.uio_rw = UIO_READ;
+			break;
+		case PIOD_WRITE_D:
+		case PIOD_WRITE_I:
+			uio.uio_rw = UIO_WRITE;
+			break;
+		default:
+			return (EINVAL);
+		}
+		error = procfs_domem(p, t, NULL, &uio);
+		piod.piod_len -= uio.uio_resid;
+		(void) copyout(&piod, SCARG(uap, addr), sizeof(piod));
 		return (error);
 
 #ifdef PT_STEP


>Release-Note:
>Audit-Trail:
>Unformatted: