diff options
author | Parménides GV <parmegv@sdf.org> | 2014-04-08 12:04:17 +0200 |
---|---|---|
committer | Parménides GV <parmegv@sdf.org> | 2014-04-08 12:04:17 +0200 |
commit | 3c3421afd8f74a3aa8d1011de07a8c18f9549210 (patch) | |
tree | 49d52344661c23d7268b8ea69466a1cfef04bf8b /app/openssl/crypto/perlasm/x86_64-xlate.pl | |
parent | 5fc5d37330d3535a0f421632694d1e7918fc22d7 (diff) |
Rename app->bitmask_android
This way, gradle commands generate apks correctly named.
Diffstat (limited to 'app/openssl/crypto/perlasm/x86_64-xlate.pl')
-rwxr-xr-x | app/openssl/crypto/perlasm/x86_64-xlate.pl | 917 |
1 files changed, 0 insertions, 917 deletions
diff --git a/app/openssl/crypto/perlasm/x86_64-xlate.pl b/app/openssl/crypto/perlasm/x86_64-xlate.pl deleted file mode 100755 index e47116b7..00000000 --- a/app/openssl/crypto/perlasm/x86_64-xlate.pl +++ /dev/null @@ -1,917 +0,0 @@ -#!/usr/bin/env perl - -# Ascetic x86_64 AT&T to MASM/NASM assembler translator by <appro>. -# -# Why AT&T to MASM and not vice versa? Several reasons. Because AT&T -# format is way easier to parse. Because it's simpler to "gear" from -# Unix ABI to Windows one [see cross-reference "card" at the end of -# file]. Because Linux targets were available first... -# -# In addition the script also "distills" code suitable for GNU -# assembler, so that it can be compiled with more rigid assemblers, -# such as Solaris /usr/ccs/bin/as. -# -# This translator is not designed to convert *arbitrary* assembler -# code from AT&T format to MASM one. It's designed to convert just -# enough to provide for dual-ABI OpenSSL modules development... -# There *are* limitations and you might have to modify your assembler -# code or this script to achieve the desired result... -# -# Currently recognized limitations: -# -# - can't use multiple ops per line; -# -# Dual-ABI styling rules. -# -# 1. Adhere to Unix register and stack layout [see cross-reference -# ABI "card" at the end for explanation]. -# 2. Forget about "red zone," stick to more traditional blended -# stack frame allocation. If volatile storage is actually required -# that is. If not, just leave the stack as is. -# 3. Functions tagged with ".type name,@function" get crafted with -# unified Win64 prologue and epilogue automatically. If you want -# to take care of ABI differences yourself, tag functions as -# ".type name,@abi-omnipotent" instead. -# 4. To optimize the Win64 prologue you can specify number of input -# arguments as ".type name,@function,N." Keep in mind that if N is -# larger than 6, then you *have to* write "abi-omnipotent" code, -# because >6 cases can't be addressed with unified prologue. -# 5. Name local labels as .L*, do *not* use dynamic labels such as 1: -# (sorry about latter). -# 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. 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.: -# -# .picmeup %rax -# lea .Label-.(%rax),%rax -# -# 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. -# a. If function accepts more than 4 arguments *and* >4th argument -# is declared as non 64-bit value, do clear its upper part. - -my $flavour = shift; -my $output = shift; -if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } - -{ my ($stddev,$stdino,@junk)=stat(STDOUT); - my ($outdev,$outino,@junk)=stat($output); - - open STDOUT,">$output" || die "can't open $output: $!" - if ($stddev!=$outdev || $stdino!=$outino); -} - -my $gas=1; $gas=0 if ($output =~ /\.asm$/); -my $elf=1; $elf=0 if (!$gas); -my $win64=0; -my $prefix=""; -my $decor=".L"; - -my $masmref=8 + 50727*2**-32; # 8.00.50727 shipped with VS2005 -my $masm=0; -my $PTR=" PTR"; - -my $nasmref=2.03; -my $nasm=0; - -if ($flavour eq "mingw64") { $gas=1; $elf=0; $win64=1; - $prefix=`echo __USER_LABEL_PREFIX__ | $ENV{CC} -E -P -`; - chomp($prefix); - } -elsif ($flavour eq "macosx") { $gas=1; $elf=0; $prefix="_"; $decor="L\$"; } -elsif ($flavour eq "masm") { $gas=0; $elf=0; $masm=$masmref; $win64=1; $decor="\$L\$"; } -elsif ($flavour eq "nasm") { $gas=0; $elf=0; $nasm=$nasmref; $win64=1; $decor="\$L\$"; $PTR=""; } -elsif (!$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; - $decor="\$L\$"; -} - -my $current_segment; -my $current_function; -my %globals; - -{ package opcode; # pick up opcodes - sub re { - my $self = shift; # single instance in enough... - local *line = shift; - undef $ret; - - if ($line =~ /^([a-z][a-z0-9]*)/i) { - $self->{op} = $1; - $ret = $self; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - - undef $self->{sz}; - if ($self->{op} =~ /^(movz)b.*/) { # movz is pain... - $self->{op} = $1; - $self->{sz} = "b"; - } elsif ($self->{op} =~ /call|jmp/) { - $self->{sz} = ""; - } elsif ($self->{op} =~ /^p/ && $' !~ /^(ush|op)/) { # SSEn - $self->{sz} = ""; - } elsif ($self->{op} =~ /([a-z]{3,})([qlwb])$/) { - $self->{op} = $1; - $self->{sz} = $2; - } - } - $ret; - } - sub size { - my $self = shift; - my $sz = shift; - $self->{sz} = $sz if (defined($sz) && !defined($self->{sz})); - $self->{sz}; - } - sub out { - my $self = shift; - if ($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") { - 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}"; - } - } else { - $self->{op} =~ s/^movz/movzx/; - if ($self->{op} eq "ret") { - $self->{op} = ""; - if ($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/) { - $self->{op} .= $self->{sz}; - } elsif ($self->{op} eq "call" && $current_segment eq ".CRT\$XCU") { - $self->{op} = "\tDQ"; - } - $self->{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 { - my $self = shift; # single instance in enough... - local *line = shift; - undef $ret; - - if ($line =~ /^\$([^,]+)/) { - $self->{value} = $1; - $ret = $self; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - } - $ret; - } - sub out { - my $self = shift; - - if ($gas) { - # Solaris /usr/ccs/bin/as can't handle multiplications - # in $self->{value} - $self->{value} =~ s/(?<![\w\$\.])(0x?[0-9a-f]+)/oct($1)/egi; - $self->{value} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; - sprintf "\$%s",$self->{value}; - } else { - $self->{value} =~ s/(0b[0-1]+)/oct($1)/eig; - $self->{value} =~ s/0x([0-9a-f]+)/0$1h/ig if ($masm); - sprintf "%s",$self->{value}; - } - } -} -{ package ea; # pick up effective addresses: expr(%reg,%reg,scale) - sub re { - my $self = shift; # single instance in enough... - local *line = shift; - undef $ret; - - # optional * ---vvv--- appears in indirect jmp/call - if ($line =~ /^(\*?)([^\(,]*)\(([%\w,]+)\)/) { - $self->{asterisk} = $1; - $self->{label} = $2; - ($self->{base},$self->{index},$self->{scale})=split(/,/,$3); - $self->{scale} = 1 if (!defined($self->{scale})); - $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})); - } - $ret; - } - sub size {} - sub out { - my $self = shift; - my $sz = shift; - - $self->{label} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; - $self->{label} =~ s/\.L/$decor/g; - - # 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 ($gas) { - # Solaris /usr/ccs/bin/as can't handle multiplications - # in $self->{label}, new gas requires sign extension... - use integer; - $self->{label} =~ s/(?<![\w\$\.])(0x?[0-9a-f]+)/oct($1)/egi; - $self->{label} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; - $self->{label} =~ s/([0-9]+)/$1<<32>>32/eg; - $self->{label} =~ s/^___imp_/__imp__/ if ($flavour eq "mingw64"); - - if (defined($self->{index})) { - sprintf "%s%s(%%%s,%%%s,%d)",$self->{asterisk}, - $self->{label},$self->{base}, - $self->{index},$self->{scale}; - } else { - sprintf "%s%s(%%%s)", $self->{asterisk},$self->{label},$self->{base}; - } - } else { - %szmap = ( b=>"BYTE$PTR", w=>"WORD$PTR", l=>"DWORD$PTR", q=>"QWORD$PTR" ); - - $self->{label} =~ s/\./\$/g; - $self->{label} =~ s/(?<![\w\$\.])0x([0-9a-f]+)/0$1h/ig; - $self->{label} = "($self->{label})" if ($self->{label} =~ /[\*\+\-\/]/); - $sz="q" if ($self->{asterisk}); - - if (defined($self->{index})) { - sprintf "%s[%s%s*%d+%s]",$szmap{$sz}, - $self->{label}?"$self->{label}+":"", - $self->{index},$self->{scale}, - $self->{base}; - } elsif ($self->{base} eq "rip") { - sprintf "%s[%s]",$szmap{$sz},$self->{label}; - } else { - sprintf "%s[%s%s]",$szmap{$sz}, - $self->{label}?"$self->{label}+":"", - $self->{base}; - } - } - } -} -{ package register; # pick up registers, which start with %. - sub re { - my $class = shift; # muliple instances... - my $self = {}; - local *line = shift; - undef $ret; - - # optional * ---vvv--- appears in indirect jmp/call - if ($line =~ /^(\*?)%(\w+)/) { - bless $self,$class; - $self->{asterisk} = $1; - $self->{value} = $2; - $ret = $self; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - } - $ret; - } - sub size { - my $self = shift; - undef $ret; - - if ($self->{value} =~ /^r[\d]+b$/i) { $ret="b"; } - elsif ($self->{value} =~ /^r[\d]+w$/i) { $ret="w"; } - elsif ($self->{value} =~ /^r[\d]+d$/i) { $ret="l"; } - elsif ($self->{value} =~ /^r[\w]+$/i) { $ret="q"; } - elsif ($self->{value} =~ /^[a-d][hl]$/i){ $ret="b"; } - elsif ($self->{value} =~ /^[\w]{2}l$/i) { $ret="b"; } - elsif ($self->{value} =~ /^[\w]{2}$/i) { $ret="w"; } - elsif ($self->{value} =~ /^e[a-z]{2}$/i){ $ret="l"; } - - $ret; - } - sub out { - my $self = shift; - if ($gas) { sprintf "%s%%%s",$self->{asterisk},$self->{value}; } - else { $self->{value}; } - } -} -{ package label; # pick up labels, which end with : - sub re { - my $self = shift; # single instance is enough... - local *line = shift; - undef $ret; - - if ($line =~ /(^[\.\w]+)\:/) { - $self->{value} = $1; - $ret = $self; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - - $self->{value} =~ s/^\.L/$decor/; - } - $ret; - } - sub out { - my $self = shift; - - if ($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"; - $func .= "${decor}SEH_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/^\$/); - $self->{value} . ":"; - } elsif ($win64 && $current_function->{abi} eq "svr4") { - my $func = "$current_function->{name}" . - ($nasm ? ":" : "\tPROC $current_function->{scope}") . - "\n"; - $func .= " mov QWORD${PTR}[8+rsp],rdi\t;WIN64 prologue\n"; - $func .= " mov QWORD${PTR}[16+rsp],rsi\n"; - $func .= " mov rax,rsp\n"; - $func .= "${decor}SEH_begin_$current_function->{name}:"; - $func .= ":" if ($masm); - $func .= "\n"; - my $narg = $current_function->{narg}; - $narg=6 if (!defined($narg)); - $func .= " mov rdi,rcx\n" if ($narg>0); - $func .= " mov rsi,rdx\n" if ($narg>1); - $func .= " mov rdx,r8\n" if ($narg>2); - $func .= " mov rcx,r9\n" if ($narg>3); - $func .= " mov r8,QWORD${PTR}[40+rsp]\n" if ($narg>4); - $func .= " mov r9,QWORD${PTR}[48+rsp]\n" if ($narg>5); - $func .= "\n"; - } else { - "$current_function->{name}". - ($nasm ? ":" : "\tPROC $current_function->{scope}"); - } - } -} -{ package expr; # pick up expressioins - sub re { - my $self = shift; # single instance is enough... - local *line = shift; - undef $ret; - - if ($line =~ /(^[^,]+)/) { - $self->{value} = $1; - $ret = $self; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - - $self->{value} =~ s/\@PLT// if (!$elf); - $self->{value} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; - $self->{value} =~ s/\.L/$decor/g; - } - $ret; - } - sub out { - my $self = shift; - if ($nasm && opcode->mnemonic()=~m/^j/) { - "NEAR ".$self->{value}; - } else { - $self->{value}; - } - } -} -{ package directive; # pick up directives, which start with . - sub re { - my $self = shift; # single instance is enough... - local *line = shift; - undef $ret; - my $dir; - my %opcode = # lea 2f-1f(%rip),%dst; 1: nop; 2: - ( "%rax"=>0x01058d48, "%rcx"=>0x010d8d48, - "%rdx"=>0x01158d48, "%rbx"=>0x011d8d48, - "%rsp"=>0x01258d48, "%rbp"=>0x012d8d48, - "%rsi"=>0x01358d48, "%rdi"=>0x013d8d48, - "%r8" =>0x01058d4c, "%r9" =>0x010d8d4c, - "%r10"=>0x01158d4c, "%r11"=>0x011d8d4c, - "%r12"=>0x01258d4c, "%r13"=>0x012d8d4c, - "%r14"=>0x01358d4c, "%r15"=>0x013d8d4c ); - - if ($line =~ /^\s*(\.\w+)/) { - $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; - }; - /\.rva|\.long|\.quad/ - && do { $line =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; - $line =~ s/\.L/$decor/g; - last; - }; - } - - if ($gas) { - $self->{value} = $dir . "\t" . $line; - - if ($dir =~ /\.extern/) { - $self->{value} = ""; # swallow extern - } elsif (!$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)) { - $self->{value} .= "${decor}SEH_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 $self; - } - - # non-gas case or nasm/masm - SWITCH: for ($dir) { - /\.text/ && do { my $v=undef; - if ($nasm) { - $v="section .text code align=64\n"; - } else { - $v="$current_segment\tENDS\n" if ($current_segment); - $current_segment = ".text\$"; - $v.="$current_segment\tSEGMENT "; - $v.=$masm>=$masmref ? "ALIGN(64)" : "PAGE"; - $v.=" 'CODE'"; - } - $self->{value} = $v; - last; - }; - /\.data/ && do { my $v=undef; - if ($nasm) { - $v="section .data data align=8\n"; - } else { - $v="$current_segment\tENDS\n" if ($current_segment); - $current_segment = "_DATA"; - $v.="$current_segment\tSEGMENT"; - } - $self->{value} = $v; - 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/) { - $v.=" rdata align="; - $v.=$1 eq "p"? 4 : 8; - } elsif ($line=~/\.CRT\$/i) { - $v.=" rdata align=8"; - } - } else { - $v="$current_segment\tENDS\n" if ($current_segment); - $v.="$line\tSEGMENT"; - if ($line=~/\.([px])data/) { - $v.=" READONLY"; - $v.=" ALIGN(".($1 eq "p" ? 4 : 8).")" if ($masm>=$masmref); - } elsif ($line=~/\.CRT\$/i) { - $v.=" READONLY DWORD"; - } - } - $current_segment = $line; - $self->{value} = $v; - last; - }; - /\.extern/ && do { $self->{value} = "EXTERN\t".$line; - $self->{value} .= ":NEAR" if ($masm); - last; - }; - /\.globl|.global/ - && do { $self->{value} = $masm?"PUBLIC":"global"; - $self->{value} .= "\t".$line; - last; - }; - /\.size/ && do { if (defined($current_function)) { - undef $self->{value}; - if ($current_function->{abi} eq "svr4") { - $self->{value}="${decor}SEH_end_$current_function->{name}:"; - $self->{value}.=":\n" if($masm); - } - $self->{value}.="$current_function->{name}\tENDP" if($masm); - undef $current_function; - } - last; - }; - /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; }; - /\.(value|long|rva|quad)/ - && do { my $sz = substr($1,0,1); - my @arr = split(/,\s*/,$line); - my $last = pop(@arr); - my $conv = sub { my $var=shift; - $var=~s/^(0b[0-1]+)/oct($1)/eig; - $var=~s/^0x([0-9a-f]+)/0$1h/ig if ($masm); - 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/bvlrq/BWDDQ/; - $self->{value} = "\tD$sz\t"; - for (@arr) { $self->{value} .= &$conv($_).","; } - $self->{value} .= &$conv($last); - last; - }; - /\.byte/ && do { my @str=split(/,\s*/,$line); - map(s/(0b[0-1]+)/oct($1)/eig,@str); - map(s/0x([0-9a-f]+)/0$1h/ig,@str) if ($masm); - while ($#str>15) { - $self->{value}.="DB\t" - .join(",",@str[0..15])."\n"; - foreach (0..15) { shift @str; } - } - $self->{value}.="DB\t" - .join(",",@str) if (@str); - last; - }; - } - $line = ""; - } - - $ret; - } - sub out { - my $self = shift; - $self->{value}; - } -} - -if ($nasm) { - print <<___; -default rel -___ -} elsif ($masm) { - print <<___; -OPTION DOTNAME -___ -} -while($line=<>) { - - chomp($line); - - $line =~ s|[#!].*$||; # get rid of asm-style comments... - $line =~ s|/\*.*\*/||; # ... and C-style comments... - $line =~ s|^\s+||; # ... and skip white spaces in beginning - - undef $label; - undef $opcode; - undef $sz; - undef @args; - - if ($label=label->re(\$line)) { print $label->out(); } - - if (directive->re(\$line)) { - printf "%s",directive->out(); - } elsif ($opcode=opcode->re(\$line)) { ARGUMENT: while (1) { - my $arg; - - if ($arg=register->re(\$line)) { opcode->size($arg->size()); } - elsif ($arg=const->re(\$line)) { } - elsif ($arg=ea->re(\$line)) { } - elsif ($arg=expr->re(\$line)) { } - else { last ARGUMENT; } - - push @args,$arg; - - last ARGUMENT if ($line !~ /^,/); - - $line =~ s/^,\s*//; - } # ARGUMENT: - - $sz=opcode->size(); - - if ($#args>=0) { - my $insn; - if ($gas) { - $insn = $opcode->out($#args>=1?$args[$#args]->size():$sz); - } else { - $insn = $opcode->out(); - $insn .= $sz if (map($_->out() =~ /x?mm/,@args)); - @args = reverse(@args); - undef $sz if ($nasm && $opcode->mnemonic() eq "lea"); - } - printf "\t%s\t%s",$insn,join(",",map($_->out($sz),@args)); - } else { - printf "\t%s",$opcode->out(); - } - } - - print $line,"\n"; -} - -print "\n$current_segment\tENDS\n" if ($current_segment && $masm); -print "END\n" if ($masm); - -close STDOUT; - -################################################# -# Cross-reference x86_64 ABI "card" -# -# Unix Win64 -# %rax * * -# %rbx - - -# %rcx #4 #1 -# %rdx #3 #2 -# %rsi #2 - -# %rdi #1 - -# %rbp - - -# %rsp - - -# %r8 #5 #3 -# %r9 #6 #4 -# %r10 * * -# %r11 * * -# %r12 - - -# %r13 - - -# %r14 - - -# %r15 - - -# -# (*) volatile register -# (-) preserved by callee -# (#) Nth argument, volatile -# -# In Unix terms top of stack is argument transfer area for arguments -# which could not be accomodated in registers. Or in other words 7th -# [integer] argument resides at 8(%rsp) upon function entry point. -# 128 bytes above %rsp constitute a "red zone" which is not touched -# by signal handlers and can be used as temporal storage without -# allocating a frame. -# -# In Win64 terms N*8 bytes on top of stack is argument transfer area, -# which belongs to/can be overwritten by callee. N is the number of -# arguments passed to callee, *but* not less than 4! This means that -# upon function entry point 5th argument resides at 40(%rsp), as well -# as that 32 bytes from 8(%rsp) can always be used as temporal -# storage [without allocating a frame]. One can actually argue that -# one can assume a "red zone" above stack pointer under Win64 as well. -# Point is that at apparently no occasion Windows kernel would alter -# the area above user stack pointer in true asynchronous manner... -# -# All the above means that if assembler programmer adheres to Unix -# register and stack layout, but disregards the "red zone" existense, -# it's possible to use following prologue and epilogue to "gear" from -# Unix to Win64 ABI in leaf functions with not more than 6 arguments. -# -# omnipotent_function: -# ifdef WIN64 -# movq %rdi,8(%rsp) -# movq %rsi,16(%rsp) -# movq %rcx,%rdi ; if 1st argument is actually present -# movq %rdx,%rsi ; if 2nd argument is actually ... -# movq %r8,%rdx ; if 3rd argument is ... -# movq %r9,%rcx ; if 4th argument ... -# movq 40(%rsp),%r8 ; if 5th ... -# movq 48(%rsp),%r9 ; if 6th ... -# endif -# ... -# ifdef WIN64 -# movq 8(%rsp),%rdi -# movq 16(%rsp),%rsi -# endif -# ret -# -################################################# -# Win64 SEH, Structured Exception Handling. -# -# Unlike on Unix systems(*) lack of Win64 stack unwinding information -# has undesired side-effect at run-time: if an exception is raised in -# assembler subroutine such as those in question (basically we're -# referring to segmentation violations caused by malformed input -# parameters), the application is briskly terminated without invoking -# any exception handlers, most notably without generating memory dump -# or any user notification whatsoever. This poses a problem. It's -# possible to address it by registering custom language-specific -# handler that would restore processor context to the state at -# subroutine entry point and return "exception is not handled, keep -# unwinding" code. Writing such handler can be a challenge... But it's -# doable, though requires certain coding convention. Consider following -# snippet: -# -# .type function,@function -# function: -# movq %rsp,%rax # copy rsp to volatile register -# pushq %r15 # save non-volatile registers -# pushq %rbx -# pushq %rbp -# movq %rsp,%r11 -# subq %rdi,%r11 # prepare [variable] stack frame -# andq $-64,%r11 -# movq %rax,0(%r11) # check for exceptions -# movq %r11,%rsp # allocate [variable] stack frame -# movq %rax,0(%rsp) # save original rsp value -# magic_point: -# ... -# movq 0(%rsp),%rcx # pull original rsp value -# movq -24(%rcx),%rbp # restore non-volatile registers -# movq -16(%rcx),%rbx -# movq -8(%rcx),%r15 -# movq %rcx,%rsp # restore original rsp -# ret -# .size function,.-function -# -# The key is that up to magic_point copy of original rsp value remains -# in chosen volatile register and no non-volatile register, except for -# rsp, is modified. While past magic_point rsp remains constant till -# the very end of the function. In this case custom language-specific -# exception handler would look like this: -# -# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame, -# CONTEXT *context,DISPATCHER_CONTEXT *disp) -# { ULONG64 *rsp = (ULONG64 *)context->Rax; -# if (context->Rip >= magic_point) -# { rsp = ((ULONG64 **)context->Rsp)[0]; -# context->Rbp = rsp[-3]; -# context->Rbx = rsp[-2]; -# context->R15 = rsp[-1]; -# } -# context->Rsp = (ULONG64)rsp; -# context->Rdi = rsp[1]; -# context->Rsi = rsp[2]; -# -# memcpy (disp->ContextRecord,context,sizeof(CONTEXT)); -# RtlVirtualUnwind(UNW_FLAG_NHANDLER,disp->ImageBase, -# dips->ControlPc,disp->FunctionEntry,disp->ContextRecord, -# &disp->HandlerData,&disp->EstablisherFrame,NULL); -# return ExceptionContinueSearch; -# } -# -# It's appropriate to implement this handler in assembler, directly in -# function's module. In order to do that one has to know members' -# offsets in CONTEXT and DISPATCHER_CONTEXT structures and some constant -# values. Here they are: -# -# CONTEXT.Rax 120 -# CONTEXT.Rcx 128 -# CONTEXT.Rdx 136 -# CONTEXT.Rbx 144 -# CONTEXT.Rsp 152 -# CONTEXT.Rbp 160 -# CONTEXT.Rsi 168 -# CONTEXT.Rdi 176 -# CONTEXT.R8 184 -# CONTEXT.R9 192 -# CONTEXT.R10 200 -# CONTEXT.R11 208 -# CONTEXT.R12 216 -# CONTEXT.R13 224 -# CONTEXT.R14 232 -# CONTEXT.R15 240 -# CONTEXT.Rip 248 -# CONTEXT.Xmm6 512 -# sizeof(CONTEXT) 1232 -# DISPATCHER_CONTEXT.ControlPc 0 -# DISPATCHER_CONTEXT.ImageBase 8 -# DISPATCHER_CONTEXT.FunctionEntry 16 -# DISPATCHER_CONTEXT.EstablisherFrame 24 -# DISPATCHER_CONTEXT.TargetIp 32 -# DISPATCHER_CONTEXT.ContextRecord 40 -# DISPATCHER_CONTEXT.LanguageHandler 48 -# DISPATCHER_CONTEXT.HandlerData 56 -# UNW_FLAG_NHANDLER 0 -# ExceptionContinueSearch 1 -# -# In order to tie the handler to the function one has to compose -# couple of structures: one for .xdata segment and one for .pdata. -# -# UNWIND_INFO structure for .xdata segment would be -# -# function_unwind_info: -# .byte 9,0,0,0 -# .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 -# .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 .LSEH_end_{function_name} -# label. To summarize, .pdata segment would contain -# -# .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 .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 -# 2GB and thus such relative references can be and are accommodated in -# 32 bits. -# -# Having reviewed the example function code, one can argue that "movq -# %rsp,%rax" above is redundant. It is not! Keep in mind that on Unix -# rax would contain an undefined value. If this "offends" you, use -# another register and refrain from modifying rax till magic_point is -# reached, i.e. as if it was a non-volatile register. If more registers -# are required prior [variable] frame setup is completed, note that -# nobody says that you can have only one "magic point." You can -# "liberate" non-volatile registers by denoting last stack off-load -# instruction and reflecting it in finer grade unwind logic in handler. -# After all, isn't it why it's called *language-specific* handler... -# -# Attentive reader can notice that exceptions would be mishandled in -# auto-generated "gear" epilogue. Well, exception effectively can't -# occur there, because if memory area used by it was subject to -# segmentation violation, then it would be raised upon call to the -# function (and as already mentioned be accounted to caller, which is -# not a problem). If you're still not comfortable, then define tail -# "magic point" just prior ret instruction and have handler treat it... -# -# (*) Note that we're talking about run-time, not debug-time. Lack of -# unwind information makes debugging hard on both Windows and -# Unix. "Unlike" referes to the fact that on Unix signal handler -# will always be invoked, core dumped and appropriate exit code -# returned to parent (for user notification). |