[src/trunk]: src/sys PR/49287: Masao Uebayashi: Handle exec_script argument v...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/adc471df7b4b
branches:  trunk
changeset: 805049:adc471df7b4b
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Dec 14 21:35:24 2014 +0000

description:
PR/49287: Masao Uebayashi: Handle exec_script argument vector from the 32 ->
64 bit case. When execing a 64 bit shell from a 32 bit binary the argument
vector was still incorrect.

XXX: Pullup 7

diffstat:

 sys/kern/kern_exec.c |  16 +++++++++++-----
 sys/sys/exec.h       |   3 ++-
 2 files changed, 13 insertions(+), 6 deletions(-)

diffs (70 lines):

diff -r d43e0b048a2c -r adc471df7b4b sys/kern/kern_exec.c
--- a/sys/kern/kern_exec.c      Sun Dec 14 21:27:49 2014 +0000
+++ b/sys/kern/kern_exec.c      Sun Dec 14 21:35:24 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_exec.c,v 1.410 2014/11/09 17:50:01 maxv Exp $     */
+/*     $NetBSD: kern_exec.c,v 1.411 2014/12/14 21:35:24 christos Exp $ */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -59,7 +59,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.410 2014/11/09 17:50:01 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.411 2014/12/14 21:35:24 christos Exp $");
 
 #include "opt_exec.h"
 #include "opt_execfmt.h"
@@ -673,7 +673,7 @@
        epp->ep_emul_arg_free = NULL;
        memset(&epp->ep_vmcmds, 0, sizeof(epp->ep_vmcmds));
        epp->ep_vap = &data->ed_attr;
-       epp->ep_flags = 0;
+       epp->ep_flags = (p->p_flag & PK_32) ? EXEC_FROM32 : 0;
        MD_TOPDOWN_INIT(epp);
        epp->ep_emul_root = NULL;
        epp->ep_interp = NULL;
@@ -1335,9 +1335,15 @@
 }
 
 static size_t
+fromptrsz(const struct exec_package *epp)
+{
+       return (epp->ep_flags & EXEC_FROM32) ? sizeof(int) : sizeof(char *);
+}
+
+static size_t
 ptrsz(const struct exec_package *epp)
 {
-       return (epp->ep_flags & EXEC_32) ?  sizeof(int) : sizeof(char *);
+       return (epp->ep_flags & EXEC_32) ? sizeof(int) : sizeof(char *);
 }
 
 static size_t
@@ -1508,7 +1514,7 @@
                return EINVAL;
        }
        if (epp->ep_flags & EXEC_SKIPARG)
-               args = (const void *)((const char *)args + ptrsz(epp));
+               args = (const void *)((const char *)args + fromptrsz(epp));
        i = 0;
        error = copyinargstrs(data, args, fetch_element, &dp, &i, ktr_execarg);
        if (error != 0) {
diff -r d43e0b048a2c -r adc471df7b4b sys/sys/exec.h
--- a/sys/sys/exec.h    Sun Dec 14 21:27:49 2014 +0000
+++ b/sys/sys/exec.h    Sun Dec 14 21:35:24 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: exec.h,v 1.146 2014/09/05 05:42:50 matt Exp $  */
+/*     $NetBSD: exec.h,v 1.147 2014/12/14 21:35:24 christos Exp $      */
 
 /*-
  * Copyright (c) 1992, 1993
@@ -230,6 +230,7 @@
 #define        EXEC_32         0x0020          /* 32-bit binary emulation */
 #define        EXEC_FORCEAUX   0x0040          /* always use ELF AUX vector */
 #define        EXEC_TOPDOWN_VM 0x0080          /* may use top-down VM layout */
+#define        EXEC_FROM32     0x0100          /* exec'ed from 32-bit binary */
 
 struct exec_vmcmd {
        int     (*ev_proc)(struct lwp *, struct exec_vmcmd *);