[src/trunk]: src/sys/compat move MAP_COPY in compat

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

details:   https://anonhg.NetBSD.org/src/rev/99bc431e524c
branches:  trunk
changeset: 823615:99bc431e524c
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Apr 29 01:15:40 2017 +0000

description:
move MAP_COPY in compat

diffstat:

 sys/compat/common/vm_43.c             |  17 +++++++++++++----
 sys/compat/netbsd32/netbsd32_netbsd.c |  11 ++++++++---
 sys/compat/sys/mman.h                 |   8 +++++++-
 3 files changed, 28 insertions(+), 8 deletions(-)

diffs (104 lines):

diff -r 5f0662fb8691 -r 99bc431e524c sys/compat/common/vm_43.c
--- a/sys/compat/common/vm_43.c Sat Apr 29 00:08:46 2017 +0000
+++ b/sys/compat/common/vm_43.c Sat Apr 29 01:15:40 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm_43.c,v 1.18 2011/02/08 20:20:26 rmind Exp $ */
+/*     $NetBSD: vm_43.c,v 1.19 2017/04/29 01:15:40 christos Exp $      */
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -43,7 +43,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.18 2011/02/08 20:20:26 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_43.c,v 1.19 2017/04/29 01:15:40 christos Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -110,12 +110,21 @@
        SCARG(&nargs, flags) = 0;
        if (SCARG(uap, flags) & OMAP_ANON)
                SCARG(&nargs, flags) |= MAP_ANON;
-       if (SCARG(uap, flags) & OMAP_COPY)
-               SCARG(&nargs, flags) |= MAP_COPY;
        if (SCARG(uap, flags) & OMAP_SHARED)
                SCARG(&nargs, flags) |= MAP_SHARED;
        else
                SCARG(&nargs, flags) |= MAP_PRIVATE;
+       if (SCARG(uap, flags) & OMAP_COPY) {
+               SCARG(&nargs, flags) |= MAP_PRIVATE;
+#if defined(COMPAT_10) && defined(__i386__)
+               /*
+                * Ancient kernel on x86 did not obey PROT_EXEC on i386 at least
+                * and ld.so did not turn it on. We take care of this on amd64
+                * in compat32.
+                */
+               SCARGS(&nargs, prot) |= PROT_EXEC;
+#endif
+       }
        if (SCARG(uap, flags) & OMAP_FIXED)
                SCARG(&nargs, flags) |= MAP_FIXED;
        if (SCARG(uap, flags) & OMAP_INHERIT)
diff -r 5f0662fb8691 -r 99bc431e524c sys/compat/netbsd32/netbsd32_netbsd.c
--- a/sys/compat/netbsd32/netbsd32_netbsd.c     Sat Apr 29 00:08:46 2017 +0000
+++ b/sys/compat/netbsd32/netbsd32_netbsd.c     Sat Apr 29 01:15:40 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: netbsd32_netbsd.c,v 1.205 2016/10/19 09:44:01 skrll Exp $      */
+/*     $NetBSD: netbsd32_netbsd.c,v 1.206 2017/04/29 01:15:40 christos Exp $   */
 
 /*
  * Copyright (c) 1998, 2001, 2008 Matthew R. Green
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: netbsd32_netbsd.c,v 1.205 2016/10/19 09:44:01 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: netbsd32_netbsd.c,v 1.206 2017/04/29 01:15:40 christos Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_ddb.h"
@@ -90,6 +90,8 @@
 #include <compat/netbsd32/netbsd32_syscallargs.h>
 #include <compat/netbsd32/netbsd32_conv.h>
 
+#include <compat/sys/mman.h>
+
 #if defined(DDB)
 #include <ddb/ddbvar.h>
 #endif
@@ -1521,8 +1523,11 @@
         * Ancient kernel on x86 did not obey PROT_EXEC on i386 at least
         * and ld.so did not turn it on!
         */
-       if (SCARG(&ua, flags) & MAP_COPY)
+       if (SCARG(&ua, flags) & COMPAT_MAP_COPY) {
+               SCARG(&ua, flags) = MAP_PRIVATE
+                   | (SCARG(&ua, flags) & ~COMPAT_MAP_COPY);
                SCARG(&ua, prot) |= PROT_EXEC;
+       }
 #endif
        NETBSD32TO64_UAP(fd);
        NETBSD32TOX_UAP(PAD, long);
diff -r 5f0662fb8691 -r 99bc431e524c sys/compat/sys/mman.h
--- a/sys/compat/sys/mman.h     Sat Apr 29 00:08:46 2017 +0000
+++ b/sys/compat/sys/mman.h     Sat Apr 29 01:15:40 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mman.h,v 1.2 2005/12/11 12:20:29 christos Exp $        */
+/*     $NetBSD: mman.h,v 1.3 2017/04/29 01:15:40 christos Exp $        */
 
 /*-
  * Copyright (c) 1982, 1986, 1993
@@ -34,6 +34,12 @@
 #ifndef _COMPAT_SYS_MMAN_H_
 #define _COMPAT_SYS_MMAN_H_
 
+/*
+ * Deprecated flag; these are treated as MAP_PRIVATE internally by
+ * the kernel. 
+ */
+#define        COMPAT_MAP_COPY 0x0004  /* "copy" region at mmap time */
+
 __BEGIN_DECLS
 int    msync(void *, size_t);
 int    __msync13(void *, size_t, int);