From: Jiri Kosina Date: Fri, 5 Oct 2012 00:12:22 +0000 (-0700) Subject: tile: fix personality bits handling upon exec() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9f6547a3209b78689ab8183630df87ca5e13fec0;p=openwrt%2Fstaging%2Fblogic.git tile: fix personality bits handling upon exec() Historically, the top three bytes of personality have been used for things such as ADDR_NO_RANDOMIZE, which made sense only for specific architectures. We now however have a flag there that is general no matter the architecture (UNAME26); generally we have to be careful to preserve the personality flags across exec(). This patch fixes tile architecture not to forcefully overwrite personality flags during exec(). In addition to that, we fix two other things along the way: - exec_domain switching is fixed -- set_personality() should always be used instead of directly assigning to current->personality. - as pointed out by Arnd Bergmann, PER_LINUX_32BIT is not used anywhere by tile, so let's just drop that in favor of PER_LINUX Signed-off-by: Jiri Kosina Acked-by: Chris Metcalf Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h index d16d006d660e..f8ccf08f6934 100644 --- a/arch/tile/include/asm/elf.h +++ b/arch/tile/include/asm/elf.h @@ -156,12 +156,12 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm, #undef SET_PERSONALITY #define SET_PERSONALITY(ex) \ do { \ - current->personality = PER_LINUX; \ + set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ current_thread_info()->status &= ~TS_COMPAT; \ } while (0) #define COMPAT_SET_PERSONALITY(ex) \ do { \ - current->personality = PER_LINUX_32BIT; \ + set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ current_thread_info()->status |= TS_COMPAT; \ } while (0)