[openssl-dev] [openssl.org #3759] [PATCH] crypto: use bigint in x86-64 perl

[Mike Frysinger via RT]

When building on x32 systems where the default type is 32bit, make sure
we can transparently represent 64bit integers.  Otherwise we end up with
build errors like:
/usr/bin/perl asm/ghash-x86_64.pl elf > ghash-x86_64.s
Integer overflow in hexadecimal number at asm/../../perlasm/x86_64-xlate.pl line 201, <> line 890.
...
ghash-x86_64.s: Assembler messages:
ghash-x86_64.s:890: Error: junk '.15473355479995e+19' after expression

We don't enable this globally as there are some cases where we'd get
32bit values interpreted as unsigned when we need them as signed.

Reported-by: Bertrand Jacquin <bertrand at jacquin.bzh>
URL: https://bugs.gentoo.org/542618
---
 crypto/perlasm/x86_64-xlate.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/crypto/perlasm/x86_64-xlate.pl b/crypto/perlasm/x86_64-xlate.pl
index aae8288..0bf9774 100755
--- a/crypto/perlasm/x86_64-xlate.pl
+++ b/crypto/perlasm/x86_64-xlate.pl
@@ -195,6 +195,10 @@ my %globals;
     sub out {
     	my $self = shift;
 
+	# When building on x32 ABIs, the expanded hex value might be too
+	# big to fit into 32bits.  Enable transparent 64bit support here
+	# so we can safely print it out.
+	use bigint;
 	if ($gas) {
 	    # Solaris /usr/ccs/bin/as can't handle multiplications
 	    # in $self->{value}
-- 
2.3.3