diff options
Diffstat (limited to 'openssl/trunk/crypto/perlasm/x86_64-xlate.pl')
| -rwxr-xr-x | openssl/trunk/crypto/perlasm/x86_64-xlate.pl | 506 |
1 files changed, 0 insertions, 506 deletions
diff --git a/openssl/trunk/crypto/perlasm/x86_64-xlate.pl b/openssl/trunk/crypto/perlasm/x86_64-xlate.pl deleted file mode 100755 index ef1a4ce6..00000000 --- a/openssl/trunk/crypto/perlasm/x86_64-xlate.pl +++ /dev/null @@ -1,506 +0,0 @@ -#!/usr/bin/env perl - -# Ascetic x86_64 AT&T to MASM 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; -# - indirect calls and jumps are not supported; -# -# Dual-ABI styling rules. -# -# 1. Adhere to Unix register and stack layout [see 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. 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. -# -# Example 1: -# .picmeup %rax -# lea .Label-.(%rax),%rax -# Example 2: -# .picmeup %rcx -# .Lpic_point: -# ... -# lea .Label-.Lpic_point(%rcx),%rbp - -my $output = shift; -open STDOUT,">$output" || die "can't open $output: $!"; - -my $masm=1 if ($output =~ /\.asm/); - -my $current_segment; -my $current_function; - -{ package opcode; # pick up opcodes - sub re { - my $self = shift; # single instance in enough... - local *line = shift; - undef $ret; - - if ($line =~ /^([a-z]+)/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} =~ /([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 $self = shift; - if (!$masm) { - if ($self->{op} eq "movz") { # movz in pain... - sprintf "%s%s%s",$self->{op},$self->{sz},shift; - } elsif ($self->{op} eq "ret") { - ".byte 0xf3,0xc3"; - } else { - "$self->{op}$self->{sz}"; - } - } else { - $self->{op} =~ s/movz/movzx/; - if ($self->{op} eq "ret") { - $self->{op} = ""; - if ($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"; - } - $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 $self = shift; - - if (!$masm) { - sprintf "\$%s",$self->{value}; - } else { - $self->{value} =~ s/0x([0-9a-f]+)/0$1h/ig; - sprintf "%s",$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 $ret; - - if ($line =~ /^([^\(,]*)\(([%\w,]+)\)/) { - $self->{label} = $1; - ($self->{base},$self->{index},$self->{scale})=split(/,/,$2); - $self->{scale} = 1 if (!defined($self->{scale})); - $ret = $self; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - - $self->{base} =~ s/^%//; - $self->{index} =~ s/^%// if (defined($self->{index})); - } - $ret; - } - sub size {} - sub out { - my $self = shift; - my $sz = shift; - - if (!$masm) { - # elder GNU assembler insists on 64-bit EAs:-( - # on pros side, this results in more compact code:-) - $self->{index} =~ s/^[er](.?[0-9xp])[d]?$/r\1/; - $self->{base} =~ s/^[er](.?[0-9xp])[d]?$/r\1/; - # Solaris /usr/ccs/bin/as can't handle multiplications - # in $self->{label} - $self->{label} =~ s/(?<![0-9a-f])(0[x0-9a-f]+)/oct($1)/eg; - $self->{label} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; - - if (defined($self->{index})) { - sprintf "%s(%%%s,%%%s,%d)", - $self->{label},$self->{base}, - $self->{index},$self->{scale}; - } else { - sprintf "%s(%%%s)", $self->{label},$self->{base}; - } - } else { - %szmap = ( b=>"BYTE", w=>"WORD", l=>"DWORD", q=>"QWORD" ); - - $self->{label} =~ s/\./\$/g; - $self->{label} =~ s/0x([0-9a-f]+)/0$1h/ig; - $self->{label} = "($self->{label})" if ($self->{label} =~ /[\*\+\-\/]/); - - if (defined($self->{index})) { - sprintf "%s PTR %s[%s*%d+%s]",$szmap{$sz}, - $self->{label}, - $self->{index},$self->{scale}, - $self->{base}; - } else { - sprintf "%s PTR %s[%s]",$szmap{$sz}, - $self->{label},$self->{base}; - } - } - } -} -{ package register; # pick up registers, which start with %. - sub re { - my $class = shift; # muliple instances... - my $self = {}; - local *line = shift; - undef $ret; - - if ($line =~ /^%(\w+)/) { - bless $self,$class; - $self->{value} = $1; - $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; - sprintf $masm?"%s":"%%%s",$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+//; - - $self->{value} =~ s/\.L/\$L/ if ($masm); - } - $ret; - } - sub out { - my $self = shift; - - if (!$masm) { - $self->{value}; - } elsif ($self->{value} ne "$current_function->{name}:") { - $self->{value}; - } elsif ($current_function->{abi} eq "svr4") { - my $func = "$current_function->{name} PROC\n". - " mov QWORD PTR 8[rsp],rdi\t;WIN64 prologue\n". - " mov QWORD PTR 16[rsp],rsi\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} PROC"; - } - } -} -{ 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+//; - - $self->{value} =~ s/\.L/\$L/g if ($masm); - } - $ret; - } - sub out { - my $self = shift; - $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+)/) { - if (!$masm) { - $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}; - } else { - $self->{value} = $line; - } - $line = ""; - return $self; - } - - $dir = $1; - $ret = $self; - undef $self->{value}; - $line = substr($line,@+[0]); $line =~ s/^\s+//; - SWITCH: for ($dir) { - /\.(text)/ - && do { my $v=undef; - $v="$current_segment\tENDS\n" if ($current_segment); - $current_segment = "_$1\$"; - $current_segment =~ tr/[a-z]/[A-Z]/; - $v.="$current_segment\tSEGMENT ALIGN(64) 'CODE'"; - $self->{value} = $v; - last; - }; - /\.globl/ && do { $self->{value} = "PUBLIC\t".$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} = $narg; - } elsif ($type eq "\@abi-omnipotent") { - undef $current_function; - $current_function->{name} = $sym; - } - last; - }; - /\.size/ && do { if (defined($current_function)) { - $self->{value}="$current_function->{name}\tENDP"; - undef $current_function; - } - last; - }; - /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; }; - /\.(byte|value|long|quad)/ - && do { my @arr = split(',',$line); - my $sz = substr($1,0,1); - my $last = pop(@arr); - - $sz =~ tr/bvlq/BWDQ/; - $self->{value} = "\tD$sz\t"; - for (@arr) { $self->{value} .= sprintf"0%Xh,",oct; } - $self->{value} .= sprintf"0%Xh",oct($last); - last; - }; - /\.picmeup/ && do { $self->{value} = sprintf"\tDD\t 0%Xh,090000000h",$opcode{$line}; - last; - }; - } - $line = ""; - } - - $ret; - } - sub out { - my $self = shift; - $self->{value}; - } -} - -while($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 $dst; - undef $src; - undef $sz; - - if ($label=label->re(\$line)) { print $label->out(); } - - if (directive->re(\$line)) { - printf "%s",directive->out(); - } elsif ($opcode=opcode->re(\$line)) { ARGUMENT: { - - if ($src=register->re(\$line)) { opcode->size($src->size()); } - elsif ($src=const->re(\$line)) { } - elsif ($src=ea->re(\$line)) { } - elsif ($src=expr->re(\$line)) { } - - last ARGUMENT if ($line !~ /^,/); - - $line = substr($line,1); $line =~ s/^\s+//; - - if ($dst=register->re(\$line)) { opcode->size($dst->size()); } - elsif ($dst=const->re(\$line)) { } - elsif ($dst=ea->re(\$line)) { } - - } # ARGUMENT: - - $sz=opcode->size(); - - if (defined($dst)) { - if (!$masm) { - printf "\t%s\t%s,%s", $opcode->out($dst->size()), - $src->out($sz),$dst->out($sz); - } else { - printf "\t%s\t%s,%s", $opcode->out(), - $dst->out($sz),$src->out($sz); - } - } elsif (defined($src)) { - printf "\t%s\t%s",$opcode->out(),$src->out($sz); - } else { - printf "\t%s",$opcode->out(); - } - } - - print $line,"\n"; -} - -print "\n$current_segment\tENDS\nEND\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]. -# -# 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 |