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Commit 01b1dee0 authored by Nick Kralevich's avatar Nick Kralevich
Browse files

init: Set ADDR_COMPAT_LAYOUT before spawning processes. 

Some Android programs have problems with memory which grows
from the top down.  Temporarily set ADDR_COMPAT_LAYOUT to
avoid breaking those programs.

Bug: 7188322
Change-Id: I61760500e670b4563838c63b82d4a0b6e354a86e
parent d6d47805

init/init.c

+16 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <sys/types.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <sys/personality.h>



#ifdef HAVE_SELINUX

#include <selinux/selinux.h>
@@ -242,6 +243,21 @@ void service_start(struct service *svc, const char *dynamic_args) 
        int fd, sz;



        umask(077);

#ifdef __arm__

        /*

         * b/7188322 - Temporarily revert to the compat memory layout

         * to avoid breaking third party apps.

         *

         * THIS WILL GO AWAY IN A FUTURE ANDROID RELEASE.

         *

         * http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7dbaa466

         * changes the kernel mapping from bottom up to top-down.

         * This breaks some programs which improperly embed

         * an out of date copy of Android's linker.

         */

        int current = personality(0xffffFFFF);

        personality(current | ADDR_COMPAT_LAYOUT);

#endif

        if (properties_inited()) {

            get_property_workspace(&fd, &sz);

            sprintf(tmp, "%d,%d", dup(fd), sz);