diff options
Diffstat (limited to 'crypto/perlasm')
-rwxr-xr-x | crypto/perlasm/x86_64-xlate.pl | 256 |
1 files changed, 171 insertions, 85 deletions
diff --git a/crypto/perlasm/x86_64-xlate.pl b/crypto/perlasm/x86_64-xlate.pl index 647e72e171..1f13850824 100755 --- a/crypto/perlasm/x86_64-xlate.pl +++ b/crypto/perlasm/x86_64-xlate.pl @@ -41,25 +41,24 @@ # 6. Don't use [or hand-code with .byte] "rep ret." "ret" mnemonic is # required to identify the spots, where to inject Win64 epilogue! # But on the pros, it's then prefixed with rep automatically:-) -# 7. Due to MASM limitations [and certain general counter-intuitivity -# of ip-relative addressing] generation of position-independent -# code is assisted by synthetic directive, .picmeup, which puts -# address of the *next* instruction into target register. +# 7. Stick to explicit ip-relative addressing. If you have to use +# GOTPCREL addressing, stick to mov symbol@GOTPCREL(%rip),%r??. +# Both are recognized and translated to proper Win64 addressing +# modes. To support legacy code a synthetic directive, .picmeup, +# is implemented. It puts address of the *next* instruction into +# target register, e.g.: # -# Example 1: # .picmeup %rax # lea .Label-.(%rax),%rax -# Example 2: -# .picmeup %rcx -# .Lpic_point: -# ... -# lea .Label-.Lpic_point(%rcx),%rbp # # 8. In order to provide for structured exception handling unified # Win64 prologue copies %rsp value to %rax. For further details # see SEH paragraph at the end. +# 9. .init segment is allowed to contain calls to functions only. -my $output = shift; +my $flavour = shift; +my $output = shift; +if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } { my ($stddev,$stdino,@junk)=stat(STDOUT); my ($outdev,$outino,@junk)=stat($output); @@ -68,7 +67,10 @@ my $output = shift; if ($stddev!=$outdev || $stdino!=$outino); } -my $win64=1 if ($output =~ /\.asm$/); +my $gas=1; $gas=0 if ($output =~ /\.asm$/); +my $elf=1; $elf=0 if (!$gas); +my $win64=0; +my $prefix=""; my $masmref=8 + 50727*2**-32; # 8.00.50727 shipped with VS2005 my $masm=0; @@ -77,12 +79,18 @@ my $PTR=" PTR"; my $nasmref=2.03; my $nasm=0; -if ($win64) +if ($flavour eq "mingw64") { $gas=1; $elf=0; $win64=1; $prefix="_"; } +elsif ($flavour eq "macosx") { $gas=1; $elf=0; $prefix="_"; } +elsif ($flavour eq "masm") { $gas=0; $elf=0; $masm=$masmref; $win64=1; } +elsif ($flavour eq "nasm") { $gas=0; $elf=0; $nasm=$nasmref; $win64=1; $PTR=""; } +elsif (!$gas) { if ($ENV{ASM} =~ m/nasm/ && `nasm -v` =~ m/version ([0-9]+)\.([0-9]+)/i) { $nasm = $1 + $2*0.01; $PTR=""; } elsif (`ml64 2>&1` =~ m/Version ([0-9]+)\.([0-9]+)(\.([0-9]+))?/) { $masm = $1 + $2*2**-16 + $4*2**-32; } die "no assembler found on %PATH" if (!($nasm || $masm)); + $win64=1; + $elf=0; } my $current_segment; @@ -121,13 +129,20 @@ my %globals; } sub out { my $self = shift; - if (!$win64) { + if ($gas) { if ($self->{op} eq "movz") { # movz is pain... sprintf "%s%s%s",$self->{op},$self->{sz},shift; } elsif ($self->{op} =~ /^set/) { "$self->{op}"; } elsif ($self->{op} eq "ret") { - ".byte 0xf3,0xc3"; + my $epilogue = ""; + if ($win64 && $current_function->{abi} eq "svr4") { + $epilogue = "movq 8(%rsp),%rdi\n\t" . + "movq 16(%rsp),%rsi\n\t"; + } + $epilogue . ".byte 0xf3,0xc3"; + } elsif ($self->{op} eq "call" && !$elf && $current_segment eq ".init") { + ".p2align\t3\n\t.quad"; } else { "$self->{op}$self->{sz}"; } @@ -135,19 +150,25 @@ my %globals; $self->{op} =~ s/^movz/movzx/; if ($self->{op} eq "ret") { $self->{op} = ""; - if ($current_function->{abi} eq "svr4") { + if ($win64 && $current_function->{abi} eq "svr4") { $self->{op} = "mov rdi,QWORD${PTR}[8+rsp]\t;WIN64 epilogue\n\t". "mov rsi,QWORD${PTR}[16+rsp]\n\t"; } $self->{op} .= "DB\t0F3h,0C3h\t\t;repret"; - } - elsif ($self->{op} =~ /^(pop|push)f/) { + } elsif ($self->{op} =~ /^(pop|push)f/) { $self->{op} .= $self->{sz}; - } + } elsif ($self->{op} eq "call" && $current_segment eq ".CRT\$XCU") { + $self->{op} = "ALIGN\t8\n\tDQ"; + } $self->{op}; } } - sub mnemonic { shift->{op}; } + sub mnemonic { + my $self=shift; + my $op=shift; + $self->{op}=$op if (defined($op)); + $self->{op}; + } } { package const; # pick up constants, which start with $ sub re { @@ -165,7 +186,7 @@ my %globals; sub out { my $self = shift; - if (!$win64) { + if ($gas) { # Solaris /usr/ccs/bin/as can't handle multiplications # in $self->{value} $self->{value} =~ s/(?<![0-9a-f])(0[x0-9a-f]+)/oct($1)/egi; @@ -192,6 +213,10 @@ my %globals; $ret = $self; $line = substr($line,@+[0]); $line =~ s/^\s+//; + if ($win64 && $self->{label} =~ s/\@GOTPCREL//) { + die if (opcode->mnemonic() ne "mov"); + opcode->mnemonic("lea"); + } $self->{base} =~ s/^%//; $self->{index} =~ s/^%// if (defined($self->{index})); } @@ -202,17 +227,20 @@ my %globals; my $self = shift; my $sz = shift; + $self->{label} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; + # Silently convert all EAs to 64-bit. This is required for # elder GNU assembler and results in more compact code, # *but* most importantly AES module depends on this feature! $self->{index} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/; $self->{base} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/; - if (!$win64) { + if ($gas) { # Solaris /usr/ccs/bin/as can't handle multiplications # in $self->{label} $self->{label} =~ s/(?<![0-9a-f])(0[x0-9a-f]+)/oct($1)/egi; $self->{label} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; + $self->{label} =~ s/\.L/L\$/g if (!$elf); if (defined($self->{index})) { sprintf "%s%s(%%%s,%%%s,%d)",$self->{asterisk}, @@ -279,7 +307,7 @@ my %globals; } sub out { my $self = shift; - if (!$win64) { sprintf "%s%%%s",$self->{asterisk},$self->{value}; } + if ($gas) { sprintf "%s%%%s",$self->{asterisk},$self->{value}; } else { $self->{value}; } } } @@ -289,24 +317,43 @@ my %globals; local *line = shift; undef $ret; - if ($line =~ /(^[\.\w]+\:)/) { + if ($line =~ /(^[\.\w]+)\:/) { $self->{value} = $1; $ret = $self; $line = substr($line,@+[0]); $line =~ s/^\s+//; - $self->{value} =~ s/\.L/\$L\$/ if ($win64); + $self->{value} =~ s/\.L/\$L\$/ if (!$gas); + $self->{value} =~ s/\.L/L\$/ if (!$elf); } $ret; } sub out { my $self = shift; - if (!$win64) { - $self->{value}; - } elsif ($self->{value} ne "$current_function->{name}:") { + if ($gas) { + my $func = ($globals{$self->{value}} or $self->{value}) . ":"; + if ($win64 && + $current_function->{name} eq $self->{value} && + $current_function->{abi} eq "svr4") { + $func .= "\n"; + $func .= " movq %rdi,8(%rsp)\n"; + $func .= " movq %rsi,16(%rsp)\n"; + $func .= " movq %rsp,%rax\n"; + $func .= ".LSEH_begin_$current_function->{name}:\n"; + my $narg = $current_function->{narg}; + $narg=6 if (!defined($narg)); + $func .= " movq %rcx,%rdi\n" if ($narg>0); + $func .= " movq %rdx,%rsi\n" if ($narg>1); + $func .= " movq %r8,%rdx\n" if ($narg>2); + $func .= " movq %r9,%rcx\n" if ($narg>3); + $func .= " movq 40(%rsp),%r8\n" if ($narg>4); + $func .= " movq 48(%rsp),%r9\n" if ($narg>5); + } + $func; + } elsif ($self->{value} ne "$current_function->{name}") { $self->{value} .= ":" if ($masm && $ret!~m/^\$/); - $self->{value}; - } elsif ($current_function->{abi} eq "svr4") { + $self->{value} . ":"; + } elsif ($win64 && $current_function->{abi} eq "svr4") { my $func = "$current_function->{name}" . ($nasm ? ":" : "\tPROC $current_function->{scope}") . "\n"; @@ -342,7 +389,10 @@ my %globals; $ret = $self; $line = substr($line,@+[0]); $line =~ s/^\s+//; - $self->{value} =~ s/\.L/\$L\$/g if ($win64); + $self->{value} =~ s/\@PLT// if (!$elf); + $self->{value} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; + $self->{value} =~ s/\.L/\$L\$/g if (!$gas); + $self->{value} =~ s/\.L/L\$/g if (!$elf); } $ret; } @@ -372,27 +422,81 @@ my %globals; "%r14"=>0x01358d4c, "%r15"=>0x013d8d4c ); if ($line =~ /^\s*(\.\w+)/) { - if (!$win64) { - $self->{value} = $1; - $line =~ s/\@abi\-omnipotent/\@function/; - $line =~ s/\@function.*/\@function/; - if ($line =~ /\.picmeup\s+(%r[\w]+)/i) { - $self->{value} = sprintf "\t.long\t0x%x,0x90000000",$opcode{$1}; - } elsif ($line =~ /\.asciz\s+"(.*)"$/) { - $self->{value} = ".byte\t".join(",",unpack("C*",$1),0); - } elsif ($line =~ /\.extern/) { + $dir = $1; + $ret = $self; + undef $self->{value}; + $line = substr($line,@+[0]); $line =~ s/^\s+//; + + SWITCH: for ($dir) { + /\.picmeup/ && do { if ($line =~ /(%r[\w]+)/i) { + $dir="\t.long"; + $line=sprintf "0x%x,0x90000000",$opcode{$1}; + } + last; + }; + /\.global|\.globl|\.extern/ + && do { $globals{$line} = $prefix . $line; + $line = $globals{$line} if ($prefix); + last; + }; + /\.type/ && do { ($sym,$type,$narg) = split(',',$line); + if ($type eq "\@function") { + undef $current_function; + $current_function->{name} = $sym; + $current_function->{abi} = "svr4"; + $current_function->{narg} = $narg; + $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE"; + } elsif ($type eq "\@abi-omnipotent") { + undef $current_function; + $current_function->{name} = $sym; + $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE"; + } + $line =~ s/\@abi\-omnipotent/\@function/; + $line =~ s/\@function.*/\@function/; + last; + }; + /\.asciz/ && do { if ($line =~ /^"(.*)"$/) { + $dir = ".byte"; + $line = join(",",unpack("C*",$1),0); + } + last; + }; + } + + if ($gas) { + $self->{value} = $dir . "\t" . $line; + + if ($dir =~ /\.extern/) { $self->{value} = ""; # swallow extern - } else { - $self->{value} = $line; + } elsif (!$elf && $dir =~ /\.type/) { + $self->{value} = ""; + $self->{value} = ".def\t" . ($globals{$1} or $1) . ";\t" . + (defined($globals{$1})?".scl 2;":".scl 3;") . + "\t.type 32;\t.endef" + if ($win64 && $line =~ /([^,]+),\@function/); + } elsif (!$elf && $dir =~ /\.size/) { + $self->{value} = ""; + if (defined($current_function)) { + $self->{value} .= ".LSEH_end_$current_function->{name}:" + if ($win64 && $current_function->{abi} eq "svr4"); + undef $current_function; + } + } elsif (!$elf && $dir =~ /\.align/) { + $self->{value} = ".p2align\t" . (log($line)/log(2)); + } elsif ($dir eq ".section") { + $current_segment=$line; + if (!$elf && $current_segment eq ".init") { + if ($flavour eq "macosx") { $self->{value} = ".mod_init_func"; } + elsif ($flavour eq "mingw64") { $self->{value} = ".section\t.ctors"; } + } + } elsif ($dir =~ /\.(text|data)/) { + $current_segment=".$1"; } $line = ""; return $self; } - $dir = $1; - $ret = $self; - undef $self->{value}; - $line = substr($line,@+[0]); $line =~ s/^\s+//; + # non-gas case or nasm/masm SWITCH: for ($dir) { /\.text/ && do { my $v=undef; if ($nasm) { @@ -419,6 +523,8 @@ my %globals; last; }; /\.section/ && do { my $v=undef; + $line =~ s/([^,]*).*/$1/; + $line = ".CRT\$XCU" if ($line eq ".init"); if ($nasm) { $v="section $line"; if ($line=~/\.([px])data/) { @@ -444,21 +550,6 @@ my %globals; /\.globl|.global/ && do { $self->{value} = $masm?"PUBLIC":"global"; $self->{value} .= "\t".$line; - $globals{$line} = $line; - last; - }; - /\.type/ && do { ($sym,$type,$narg) = split(',',$line); - if ($type eq "\@function") { - undef $current_function; - $current_function->{name} = $sym; - $current_function->{abi} = "svr4"; - $current_function->{narg} = $narg; - $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE"; - } elsif ($type eq "\@abi-omnipotent") { - undef $current_function; - $current_function->{name} = $sym; - $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE"; - } last; }; /\.size/ && do { if (defined($current_function)) { @@ -473,38 +564,32 @@ my %globals; last; }; /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; }; - /\.(byte|value|long|quad)/ + /\.(value|long|rva|quad)/ && do { my $sz = substr($1,0,1); my @arr = split(',',$line); my $last = pop(@arr); my $conv = sub { my $var=shift; $var=~s/0x([0-9a-f]+)/0$1h/ig; $var=~s/\.L/\$L\$/g; - if ($current_segment=~/.[px]data/) + if ($sz eq "D" && ($current_segment=~/.[px]data/ || $dir eq ".rva")) { $var=~s/([_a-z\$\@][_a-z0-9\$\@]*)/$nasm?"$1 wrt ..imagebase":"imagerel $1"/egi; } $var; }; - $sz =~ tr/bvlq/BWDQ/; + $sz =~ tr/bvlrq/BWDDQ/; $self->{value} = "\tD$sz\t"; for (@arr) { $self->{value} .= &$conv($_).","; } $self->{value} .= &$conv($last); last; }; - /\.picmeup/ && do { $self->{value} = sprintf"\tDD\t0%Xh,090000000h",$opcode{$line}; - last; - }; - /\.asciz/ && do { if ($line =~ /^"(.*)"$/) { - my @str=unpack("C*",$1); - push @str,0; - while ($#str>15) { - $self->{value}.="DB\t" - .join(",",@str[0..15])."\n"; - foreach (0..15) { shift @str; } - } + /\.byte/ && do { my @str=split(",",$line); + while ($#str>15) { $self->{value}.="DB\t" - .join(",",@str) if (@str); + .join(",",@str[0..15])."\n"; + foreach (0..15) { shift @str; } } + $self->{value}.="DB\t" + .join(",",@str) if (@str); last; }; } @@ -566,7 +651,7 @@ while($line=<>) { $sz=opcode->size(); if (defined($dst)) { - if (!$win64) { + if ($gas) { printf "\t%s\t%s,%s", $opcode->out($dst->size()), $src->out($sz),$dst->out($sz); } else { @@ -584,7 +669,8 @@ while($line=<>) { print $line,"\n"; } -print "\n$current_segment\tENDS\nEND\n" if ($current_segment && $masm); +print "\n$current_segment\tENDS\n" if ($current_segment && $masm); +print "END\n" if ($masm); close STDOUT; @@ -759,26 +845,26 @@ close STDOUT; # # function_unwind_info: # .byte 9,0,0,0 -# .long handler +# .rva handler # # This structure designates exception handler for a function with # zero-length prologue, no stack frame or frame register. # # To facilitate composing of .pdata structures, auto-generated "gear" # prologue copies rsp value to rax and denotes next instruction with -# $L$SEH_begin_{function_name} label. This essentially defines the SEH +# .LSEH_begin_{function_name} label. This essentially defines the SEH # styling rule mentioned in the beginning. Position of this label is # chosen in such manner that possible exceptions raised in the "gear" # prologue would be accounted to caller and unwound from latter's frame. -# End of function is marked with respective $L$SEH_end_{function_name} +# End of function is marked with respective .LSEH_end_{function_name} # label. To summarize, .pdata segment would contain # -# .long $L$SEH_begin_function -# .long $L$SEH_end_function -# .long function_unwind_info +# .rva .LSEH_begin_function +# .rva .LSEH_end_function +# .rva function_unwind_info # # Reference to functon_unwind_info from .xdata segment is the anchor. -# In case you wonder why references are 32-bit .longs and not 64-bit +# In case you wonder why references are 32-bit .rvas and not 64-bit # .quads. References put into these two segments are required to be # *relative* to the base address of the current binary module, a.k.a. # image base. No Win64 module, be it .exe or .dll, can be larger than |