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authorKees Cook <keescook@chromium.org>2016-12-16 12:59:31 -0800
committerKees Cook <keescook@chromium.org>2017-01-03 12:08:59 -0800
commit9988f4d577f42f43b7612d755477585f35424af7 (patch)
tree5467f7efe4219aef56b66ab3b086c6c818d4e59a /scripts
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
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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: Arnd Bergmann <arnd@arndb.de> Reported-by: Brad Spengler <spender@grsecurity.net> Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/gcc-plugins/latent_entropy_plugin.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/scripts/gcc-plugins/latent_entropy_plugin.c b/scripts/gcc-plugins/latent_entropy_plugin.c
index 12541126575b..8ff203ad4809 100644
--- a/scripts/gcc-plugins/latent_entropy_plugin.c
+++ b/scripts/gcc-plugins/latent_entropy_plugin.c
@@ -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;
}