x86 perlasm updates.
This commit is contained in:
Andy Polyakov
@@ -7,6 +7,7 @@ package x86nasm;
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$lprfx="\@L";
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$label="000";
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$under=($::netware)?'':'_';
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$initseg="";
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sub ::generic
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{ my $opcode=shift;
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@@ -117,15 +118,10 @@ sub ::function_end_B
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sub ::file_end
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{ # try to detect if SSE2 or MMX extensions were used on Win32...
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if ($::win32 && grep {/\s+[x]*mm[0-7]/i} @out)
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{ # One can argue that it's wasteful to craft every
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# SSE/MMX module with this snippet... Well, it's 72
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# bytes long and for the moment we have two modules.
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# Let's argue when we have 7 modules or so...
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#
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# $1<<10 sets a reserved bit to signal that variable
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if ($::win32 && grep {/\b[x]?mm[0-7]\b|OPENSSL_ia32cap_P\b/i} @out)
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{ # $1<<10 sets a reserved bit to signal that variable
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# was initialized already...
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my $tmp=<<___;
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my $code=<<___;
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align 16
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${lprfx}OPENSSL_ia32cap_init:
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lea edx,[${under}OPENSSL_ia32cap_P]
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@@ -143,27 +139,60 @@ ${lprfx}OPENSSL_ia32cap_init:
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xor eax,ecx
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bt eax,21
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jnc NEAR ${lprfx}nocpuid
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push ebp
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push edi
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push ebx
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mov edi,edx
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xor eax,eax
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cpuid
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xor eax,eax
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cmp ebx,'Genu'
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setne al
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mov ebp,eax
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cmp edx,'ineI'
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setne al
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or ebp,eax
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cmp eax,'ntel'
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setne al
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or ebp,eax
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mov eax,1
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cpuid
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cmp ebp,0
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jne ${lprfx}notP4
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and ah,15
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cmp ah,15
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jne ${lprfx}notP4
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or edx,1<<20
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${lprfx}notP4:
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bt edx,28
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jnc ${lprfx}done
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shr ebx,16
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cmp bl,1
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ja ${lprfx}done
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and edx,0xefffffff
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${lprfx}done:
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or edx,1<<10
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mov DWORD [edi],edx
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pop ebx
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pop edi
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pop ebp
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${lprfx}nocpuid:
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ret
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segment .CRT\$XCU data align=4
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dd ${lprfx}OPENSSL_ia32cap_init
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___
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my $data=<<___;
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segment .bss
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common ${under}OPENSSL_ia32cap_P 4
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___
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#<not needed in OpenSSL context>#push (@out,$code);
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# comment out OPENSSL_ia32cap_P declarations
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grep {s/(^extern\s+${under}OPENSSL_ia32cap_P)/\;$1/} @out;
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push (@out,$tmp);
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push (@out,$data)
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}
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push (@out,$initseg) if ($initseg);
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}
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sub ::comment { foreach (@_) { push(@out,"\t; $_\n"); } }
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@@ -216,12 +245,11 @@ sub ::picmeup
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sub ::initseg
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{ my($f)=$under.shift;
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if ($::win32)
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{ my($tmp)=<<___;
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segment .CRT\$XCU rdata align=4
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{ $initseg=<<___;
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segment .CRT\$XCU data align=4
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extern $f
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dd $f
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___
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push(@out,$tmp);
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}
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}
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@@ -5,8 +5,6 @@ package x86unix; # GAS actually...
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*out=\@::out;
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$label="L000";
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$const="";
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$constl=0;
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$align=($::aout)?"4":"16";
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$under=($::aout or $::coff)?"_":"";
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@@ -189,24 +187,20 @@ sub ::set_label
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sub ::file_end
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{ # try to detect if SSE2 or MMX extensions were used on ELF platform...
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if ($::elf && grep {/%[x]?mm[0-7]/i} @out){
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my $tmp;
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if ($::elf && grep {/\b%[x]?mm[0-7]\b|OPENSSL_ia32cap_P\b/i} @out) {
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push (@out,"\n.section\t.bss\n");
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push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n");
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return; # below is not needed in OpenSSL context
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push (@out,".section\t.init\n");
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# One can argue that it's wasteful to craft every
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# SSE/MMX module with this snippet... Well, it's 72
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# bytes long and for the moment we have two modules.
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# Let's argue when we have 7 modules or so...
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#
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&::picmeup("edx","OPENSSL_ia32cap_P");
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# $1<<10 sets a reserved bit to signal that variable
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# was initialized already...
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&::picmeup("edx","OPENSSL_ia32cap_P");
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$tmp=<<___;
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my $code=<<___;
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cmpl \$0,(%edx)
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jne 1f
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jne 3f
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movl \$1<<10,(%edx)
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pushf
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popl %eax
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@@ -218,27 +212,47 @@ sub ::file_end
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popl %eax
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xorl %ecx,%eax
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btl \$21,%eax
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jnc 1f
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jnc 3f
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pushl %ebp
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pushl %edi
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pushl %ebx
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movl %edx,%edi
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movl \$1,%eax
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xor %eax,%eax
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.byte 0x0f,0xa2
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orl \$1<<10,%edx
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xorl %eax,%eax
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cmpl $1970169159,%ebx
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setne %al
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movl %eax,%ebp
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cmpl $1231384169,%edx
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setne %al
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orl %eax,%ebp
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cmpl $1818588270,%ecx
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setne %al
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orl %eax,%ebp
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movl $1,%eax
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.byte 0x0f,0xa2
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cmpl $0,%ebp
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jne 1f
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andb $15,%ah
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cmpb $15,%ah
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jne 1f
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orl $1048576,%edx
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1: btl $28,%edx
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jnc 2f
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shrl $16,%ebx
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cmpb $1,%bl
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ja 2f
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andl $4026531839,%edx
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2: orl \$1<<10,%edx
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movl %edx,0(%edi)
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popl %ebx
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popl %edi
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jmp 1f
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popl %ebp
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jmp 3f
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.align $align
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1:
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3:
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___
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push (@out,$tmp);
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}
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if ($const ne "")
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{ push(@out,".section .rodata\n");
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push(@out,$const);
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$const="";
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push (@out,$code);
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}
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}
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