Commit 9988f4d5 authored by Kees Cook's avatar Kees Cook

latent_entropy: fix ARM build error on earlier gcc

This fixes build errors seen on gcc-4.9.3 or gcc-5.3.1 for an ARM:

arm-soc/init/initramfs.c: In function 'error':
arm-soc/init/initramfs.c:50:1: error: unrecognizable insn:
 }
 ^
(insn 26 25 27 5 (set (reg:SI 111 [ local_entropy.243 ])
        (rotatert:SI (reg:SI 116 [ local_entropy.243 ])
            (const_int -30 [0xffffffffffffffe2]))) -1
     (nil))

Patch from PaX Team <pageexec@freemail.hu>
Reported-by: default avatarArnd Bergmann <arnd@arndb.de>
Reported-by: default avatarBrad Spengler <spender@grsecurity.net>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
parent 0c744ea4
......@@ -328,9 +328,9 @@ static enum tree_code get_op(tree *rhs)
op = LROTATE_EXPR;
/*
* This code limits the value of random_const to
* the size of a wide int for the rotation
* the size of a long for the rotation
*/
random_const &= HOST_BITS_PER_WIDE_INT - 1;
random_const %= TYPE_PRECISION(long_unsigned_type_node);
break;
}
......
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