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Commit a9f856b1 authored by Jiyong Park's avatar Jiyong Park Committed by Automerger Merge Worker
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Merge "init: don't touch mmap_rnd_compat_bits on 64-bit only builds" am: 2d79c6c0 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2154914



Change-Id: I1e3ef837b69b85c5a554a9d0f41d319dd986ecb4
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents 6bfcefca 2d79c6c0

init/security.cpp

+3 −2
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
 */



#include "security.h"

#include "util.h"



#include <errno.h>

#include <fcntl.h>
@@ -106,12 +107,12 @@ Result<void> SetMmapRndBitsAction(const BuiltinArguments&) { 
    return {};

#elif defined(__aarch64__)

    // arm64 supports 18 - 33 bits depending on pagesize and VA_SIZE

    if (SetMmapRndBitsMin(33, 24, false) && SetMmapRndBitsMin(16, 16, true)) {

    if (SetMmapRndBitsMin(33, 24, false) && (!Has32BitAbi() || SetMmapRndBitsMin(16, 16, true))) {

        return {};

    }

#elif defined(__x86_64__)

    // x86_64 supports 28 - 32 bits

    if (SetMmapRndBitsMin(32, 32, false) && SetMmapRndBitsMin(16, 16, true)) {

    if (SetMmapRndBitsMin(32, 32, false) && (!Has32BitAbi() || SetMmapRndBitsMin(16, 16, true))) {

        return {};

    }

#elif defined(__arm__) || defined(__i386__)

init/util.cpp

+5 −0
Original line number Diff line number Diff line
@@ -733,5 +733,10 @@ bool IsMicrodroid() { 
    return is_microdroid;

}



bool Has32BitAbi() {

    static bool has = !android::base::GetProperty("ro.product.cpu.abilist32", "").empty();

    return has;

}



}  // namespace init

}  // namespace android

init/util.h

+1 −0
Original line number Diff line number Diff line
@@ -106,5 +106,6 @@ bool IsDefaultMountNamespaceReady(); 
void SetDefaultMountNamespaceReady();



bool IsMicrodroid();

bool Has32BitAbi();

}  // namespace init

}  // namespace android