diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-11-15 00:51:41 -0800 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-11-15 11:49:49 -0800 |
| commit | dfe3c11022d3ccd9fbe933a224a43cdeddf07851 (patch) | |
| tree | e7f465048b70d27df2201bfc36fc686d90e14072 /src/crypto/zinc | |
| parent | eb531fdd490b5b870e56d2ff9802c4bc5cee7237 (diff) | |
perlasm: avoid rep ret
The original hardcodes returns as .byte 0xf3,0xc3, aka "rep ret".
We replace this by "ret". "rep ret" was meant to help with AMD K8
chips, cf. http://repzret.org/p/repzret. It makes no sense to
continue to use this kludge for code that won't even run on ancient
AMD chips.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/crypto/zinc')
| -rw-r--r-- | src/crypto/zinc/perlasm/x86_64-xlate.pl | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/crypto/zinc/perlasm/x86_64-xlate.pl b/src/crypto/zinc/perlasm/x86_64-xlate.pl index 8a18c5b..0fe1516 100644 --- a/src/crypto/zinc/perlasm/x86_64-xlate.pl +++ b/src/crypto/zinc/perlasm/x86_64-xlate.pl @@ -164,7 +164,7 @@ my %globals; $epilogue = "movq 8(%rsp),%rdi\n\t" . "movq 16(%rsp),%rsi\n\t"; } - $epilogue . ".byte 0xf3,0xc3"; + $epilogue . "ret"; } elsif ($self->{op} eq "call" && !$elf && $current_segment eq ".init") { ".p2align\t3\n\t.quad"; } else { |