From: David van Moolenbroek <david@minix3.org>
Date: Tue, 14 Sep 2010 21:21:54 +0000 (+0000)
Subject: PM: save process frame length
X-Git-Tag: v3.2.0~881
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/Bv9ARM.ch10.html?a=commitdiff_plain;h=7763fd67c7789175b8e7e008e39b87d1e6e473ea;p=minix.git

PM: save process frame length
---

diff --git a/commands/ps/ps.c b/commands/ps/ps.c
index 3be292482..bd6f10e71 100644
--- a/commands/ps/ps.c
+++ b/commands/ps/ps.c
@@ -562,7 +562,7 @@ int pstat(int p_nr, struct pstat *bufp, int endpoints)
   bufp->ps_utime = ps_proc[p_ki].p_user_time;
   bufp->ps_stime = ps_proc[p_ki].p_sys_time;
 
-  bufp->ps_procargs = ps_mproc[p_nr].mp_procargs;
+  bufp->ps_procargs = ps_mproc[p_nr].mp_frame_addr;
 
   if (bufp->ps_state == Z_STATE)
 	bufp->ps_args = "<defunct>";
diff --git a/servers/pm/exec.c b/servers/pm/exec.c
index 0b9b0df13..de58d4a0f 100644
--- a/servers/pm/exec.c
+++ b/servers/pm/exec.c
@@ -8,7 +8,7 @@
  *    - take care of setuid and setgid bits
  *    - fix up 'mproc' table
  *    - tell kernel about EXEC
- *    - save offset to initial argc (for ps)
+ *    - save offset to initial argc (for procfs)
  *
  * The entry points into this file are:
  *   do_exec:	 perform the EXEC system call
@@ -95,8 +95,9 @@ PUBLIC int do_exec_newmem()
 		strncpy(rmp->mp_name, args.progname, PROC_NAME_LEN-1);
 		rmp->mp_name[PROC_NAME_LEN-1] = '\0';
 
-		/* Save offset to initial argc (for ps) */
-		rmp->mp_procargs = (vir_bytes) stack_top - args.args_bytes;
+		/* Save offset to initial argc (for procfs) */
+		rmp->mp_frame_addr = (vir_bytes) stack_top - args.args_bytes;
+		rmp->mp_frame_len = args.args_bytes;
 
 		/* Kill process if something goes wrong after this point. */
 		rmp->mp_flags |= PARTIAL_EXEC;
@@ -183,7 +184,7 @@ vir_bytes pc;
 		check_sig(rmp->mp_pid, sn, FALSE /* ksig */);
 	}
 
-	new_sp= (char *)rmp->mp_procargs;
+	new_sp= (char *)rmp->mp_frame_addr;
 	r= sys_exec(rmp->mp_endpoint, new_sp, rmp->mp_name, pc);
 	if (r != OK) panic("sys_exec failed: %d", r);
 }
diff --git a/servers/pm/mproc.h b/servers/pm/mproc.h
index b75264bca..f207a01a5 100644
--- a/servers/pm/mproc.h
+++ b/servers/pm/mproc.h
@@ -50,9 +50,12 @@ EXTERN struct mproc {
 
   unsigned mp_flags;		/* flag bits */
   unsigned mp_trace_flags;	/* trace options */
-  vir_bytes mp_procargs;        /* ptr to proc's initial stack arguments */
   message mp_reply;		/* reply message to be sent to one */
 
+  /* Process execution frame. Both fields are used by procfs. */
+  vir_bytes mp_frame_addr;	/* ptr to proc's initial stack arguments */
+  size_t mp_frame_len;		/* size of proc's initial stack arguments */
+
   /* Scheduling priority. */
   signed int mp_nice;		/* nice is PRIO_MIN..PRIO_MAX, standard 0. */