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From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Thu, 13 Oct 2011 16:20:10 +0000 (UTC)
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Subject: svn commit: r226343 - head/sys/vm
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Author: marcel
Date: Thu Oct 13 16:20:10 2011
New Revision: 226343
URL: http://svn.freebsd.org/changeset/base/226343

Log:
  In sys_obreak() and when compiling for amd64 or ia64, when the process
  is ILP32 (i.e. i386) grant execute permissions by default. The JDK 1.4.x
  depends on being able to execute from the heap on i386.

Modified:
  head/sys/vm/vm_unix.c

Modified: head/sys/vm/vm_unix.c
==============================================================================
--- head/sys/vm/vm_unix.c	Thu Oct 13 16:16:46 2011	(r226342)
+++ head/sys/vm/vm_unix.c	Thu Oct 13 16:20:10 2011	(r226343)
@@ -36,6 +36,8 @@
  *	@(#)vm_unix.c	8.1 (Berkeley) 6/11/93
  */
 
+#include "opt_compat.h"
+
 /*
  * Traditional sbrk/grow interface to VM
  */
@@ -49,6 +51,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/proc.h>
 #include <sys/racct.h>
 #include <sys/resourcevar.h>
+#include <sys/sysent.h>
 #include <sys/sysproto.h>
 #include <sys/systm.h>
 
@@ -75,7 +78,7 @@ sys_obreak(td, uap)
 	struct vmspace *vm = td->td_proc->p_vmspace;
 	vm_offset_t new, old, base;
 	rlim_t datalim, vmemlim;
-	int rv;
+	int prot, rv;
 	int error = 0;
 	boolean_t do_map_wirefuture;
 
@@ -135,8 +138,15 @@ sys_obreak(td, uap)
 		}
 		PROC_UNLOCK(td->td_proc);
 #endif
+		prot = VM_PROT_RW;
+#ifdef COMPAT_FREEBSD32
+#if defined(__amd64__) || defined(__ia64__)
+		if (SV_PROC_FLAG(td->td_proc, SV_ILP32))
+			prot |= VM_PROT_EXECUTE;
+#endif
+#endif
 		rv = vm_map_insert(&vm->vm_map, NULL, 0, old, new,
-		    VM_PROT_RW, VM_PROT_ALL, 0);
+		    prot, VM_PROT_ALL, 0);
 		if (rv != KERN_SUCCESS) {
 #ifdef RACCT
 			PROC_LOCK(td->td_proc);