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Expand OPENSSL_ia32cap_P to 64 bits. It might appear controversial, because

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such operation can be considered as breaking binary compatibility. However!
OPNESSL_ia32cap_P is accessed by application through pointer returned by
OPENSSL_ia32cap_loc() and such change of *internal* OPENSSL_ia32cap_P
declaration is possible specifically on little-endian platforms, such as
x86[_64] ones in question. In addition, if 32-bit application calls
OPENSSL_ia32cap_loc(), it clears upper half of capability vector maintaining
the illusion that it's still 32 bits wide.
This commit is contained in:
Andy Polyakov
2011-06-28 13:31:58 +00:00
parent 500007c9ed
commit 0ec55604c0
6 changed files with 32 additions and 11 deletions
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2
crypto/perlasm/x86gas.pl
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@@ -150,7 +150,7 @@ sub ::public_label
sub ::file_end
{ if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) {
my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,4";
my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,8";
if ($::elf) { push (@out,"$tmp,4\n"); }
else { push (@out,"$tmp\n"); }
}

2
crypto/perlasm/x86masm.pl
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@@ -129,7 +129,7 @@ ___
if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out)
{ my $comm=<<___;
.bss SEGMENT 'BSS'
COMM ${nmdecor}OPENSSL_ia32cap_P:DWORD
COMM ${nmdecor}OPENSSL_ia32cap_P:QWORD
.bss ENDS
___
# comment out OPENSSL_ia32cap_P declarations

2
crypto/perlasm/x86nasm.pl
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@@ -114,7 +114,7 @@ sub ::file_end
{ if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out)
{ my $comm=<<___;
${drdecor}segment .bss
${drdecor}common ${nmdecor}OPENSSL_ia32cap_P 4
${drdecor}common ${nmdecor}OPENSSL_ia32cap_P 8
___
# comment out OPENSSL_ia32cap_P declarations
grep {s/(^extern\s+${nmdecor}OPENSSL_ia32cap_P)/\;$1/} @out;