From 12c161f27865d0e389cd593c669bd740d7f24692 Mon Sep 17 00:00:00 2001
From: Jamie Liu <jamieliu@google.com>
Date: Fri, 11 May 2018 11:16:57 -0700
Subject: Implement MAP_32BIT.

PiperOrigin-RevId: 196281052
Change-Id: Ie620a0f983a1bf2570d0003d4754611879335c1c
---
 pkg/sentry/memmap/memmap.go | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'pkg/sentry/memmap')

diff --git a/pkg/sentry/memmap/memmap.go b/pkg/sentry/memmap/memmap.go
index 14fed55bc..72986cbb9 100644
--- a/pkg/sentry/memmap/memmap.go
+++ b/pkg/sentry/memmap/memmap.go
@@ -266,6 +266,12 @@ type MMapOpts struct {
 	// be replaced. If Unmap is true, Fixed must be true.
 	Unmap bool
 
+	// If Map32Bit is true, all addresses in the created mapping must fit in a
+	// 32-bit integer. (Note that the "end address" of the mapping, i.e. the
+	// address of the first byte *after* the mapping, need not fit in a 32-bit
+	// integer.) Map32Bit is ignored if Fixed is true.
+	Map32Bit bool
+
 	// Perms is the set of permissions to the applied to this mapping.
 	Perms usermem.AccessType
 
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