195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#!/usr/bin/env perl 295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Ascetic x86_64 AT&T to MASM/NASM assembler translator by <appro>. 495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Why AT&T to MASM and not vice versa? Several reasons. Because AT&T 695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# format is way easier to parse. Because it's simpler to "gear" from 795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Unix ABI to Windows one [see cross-reference "card" at the end of 895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# file]. Because Linux targets were available first... 995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 1095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# In addition the script also "distills" code suitable for GNU 1195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# assembler, so that it can be compiled with more rigid assemblers, 1295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# such as Solaris /usr/ccs/bin/as. 1395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 1495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# This translator is not designed to convert *arbitrary* assembler 1595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# code from AT&T format to MASM one. It's designed to convert just 1695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# enough to provide for dual-ABI OpenSSL modules development... 1795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# There *are* limitations and you might have to modify your assembler 1895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# code or this script to achieve the desired result... 1995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 2095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Currently recognized limitations: 2195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 2295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# - can't use multiple ops per line; 2395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 2495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Dual-ABI styling rules. 2595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 2695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 1. Adhere to Unix register and stack layout [see cross-reference 2795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ABI "card" at the end for explanation]. 2895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 2. Forget about "red zone," stick to more traditional blended 2995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# stack frame allocation. If volatile storage is actually required 3095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# that is. If not, just leave the stack as is. 3195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 3. Functions tagged with ".type name,@function" get crafted with 3295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# unified Win64 prologue and epilogue automatically. If you want 3395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# to take care of ABI differences yourself, tag functions as 3495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ".type name,@abi-omnipotent" instead. 3595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 4. To optimize the Win64 prologue you can specify number of input 3695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# arguments as ".type name,@function,N." Keep in mind that if N is 3795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# larger than 6, then you *have to* write "abi-omnipotent" code, 3895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# because >6 cases can't be addressed with unified prologue. 3995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 5. Name local labels as .L*, do *not* use dynamic labels such as 1: 4095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# (sorry about latter). 4195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 6. Don't use [or hand-code with .byte] "rep ret." "ret" mnemonic is 4295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# required to identify the spots, where to inject Win64 epilogue! 4395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# But on the pros, it's then prefixed with rep automatically:-) 4495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 7. Stick to explicit ip-relative addressing. If you have to use 4595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# GOTPCREL addressing, stick to mov symbol@GOTPCREL(%rip),%r??. 4695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Both are recognized and translated to proper Win64 addressing 4795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# modes. To support legacy code a synthetic directive, .picmeup, 4895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# is implemented. It puts address of the *next* instruction into 4995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# target register, e.g.: 5095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 5195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .picmeup %rax 5295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# lea .Label-.(%rax),%rax 5395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 5495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 8. In order to provide for structured exception handling unified 5595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Win64 prologue copies %rsp value to %rax. For further details 5695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# see SEH paragraph at the end. 5795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 9. .init segment is allowed to contain calls to functions only. 5895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# a. If function accepts more than 4 arguments *and* >4th argument 5995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# is declared as non 64-bit value, do clear its upper part. 6095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $flavour = shift; 6295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $output = shift; 6395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyif ($flavour =~ /\./) { $output = $flavour; undef $flavour; } 6495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyopen STDOUT,">$output" || die "can't open $output: $!" 6695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (defined($output)); 6795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $gas=1; $gas=0 if ($output =~ /\.asm$/); 6995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $elf=1; $elf=0 if (!$gas); 7095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $win64=0; 7195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $prefix=""; 7295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $decor=".L"; 7395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 7495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $masmref=8 + 50727*2**-32; # 8.00.50727 shipped with VS2005 7595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $masm=0; 7695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $PTR=" PTR"; 7795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 7895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $nasmref=2.03; 7995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $nasm=0; 8095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 8195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyif ($flavour eq "mingw64") { $gas=1; $elf=0; $win64=1; 8295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $prefix=`echo __USER_LABEL_PREFIX__ | $ENV{CC} -E -P -`; 8395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley chomp($prefix); 8495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 8595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyelsif ($flavour eq "macosx") { $gas=1; $elf=0; $prefix="_"; $decor="L\$"; } 8695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyelsif ($flavour eq "masm") { $gas=0; $elf=0; $masm=$masmref; $win64=1; $decor="\$L\$"; } 8795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyelsif ($flavour eq "nasm") { $gas=0; $elf=0; $nasm=$nasmref; $win64=1; $decor="\$L\$"; $PTR=""; } 8895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyelsif (!$gas) 8995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ if ($ENV{ASM} =~ m/nasm/ && `nasm -v` =~ m/version ([0-9]+)\.([0-9]+)/i) 9095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { $nasm = $1 + $2*0.01; $PTR=""; } 9195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif (`ml64 2>&1` =~ m/Version ([0-9]+)\.([0-9]+)(\.([0-9]+))?/) 9295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { $masm = $1 + $2*2**-16 + $4*2**-32; } 9395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley die "no assembler found on %PATH" if (!($nasm || $masm)); 9495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $win64=1; 9595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $elf=0; 9695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $decor="\$L\$"; 9795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 9895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 9995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $current_segment; 10095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $current_function; 10195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy %globals; 10295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 10395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package opcode; # pick up opcodes 10495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 10595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; # single instance in enough... 10695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 10795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 10895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 10995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /^([a-z][a-z0-9]*)/i) { 11095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} = $1; 11195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 11295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 11395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 11495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $self->{sz}; 11595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($self->{op} =~ /^(movz)x?([bw]).*/) { # movz is pain... 11695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} = $1; 11795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = $2; 11895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /call|jmp/) { 11995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = ""; 12095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /^p/ && $' !~ /^(ush|op|insrw)/) { # SSEn 12195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = ""; 12295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /^v/) { # VEX 12395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = ""; 12495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /movq/ && $line =~ /%xmm/) { 12595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = ""; 12695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /([a-z]{3,})([qlwb])$/) { 12795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} = $1; 12895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = $2; 12995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 13095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 13195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 13295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 13395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub size { 13495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 13595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $sz = shift; 13695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz} = $sz if (defined($sz) && !defined($self->{sz})); 13795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{sz}; 13895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 13995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 14095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 14195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { 14295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($self->{op} eq "movz") { # movz is pain... 14395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s%s%s",$self->{op},$self->{sz},shift; 14495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /^set/) { 14595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "$self->{op}"; 14695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} eq "ret") { 14795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $epilogue = ""; 14895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($win64 && $current_function->{abi} eq "svr4") { 14995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $epilogue = "movq 8(%rsp),%rdi\n\t" . 15095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "movq 16(%rsp),%rsi\n\t"; 15195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 15295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $epilogue . ".byte 0xf3,0xc3"; 15395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} eq "call" && !$elf && $current_segment eq ".init") { 15495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ".p2align\t3\n\t.quad"; 15595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 15695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "$self->{op}$self->{sz}"; 15795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 15895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 15995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} =~ s/^movz/movzx/; 16095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($self->{op} eq "ret") { 16195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} = ""; 16295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($win64 && $current_function->{abi} eq "svr4") { 16395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} = "mov rdi,QWORD${PTR}[8+rsp]\t;WIN64 epilogue\n\t". 16495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "mov rsi,QWORD${PTR}[16+rsp]\n\t"; 16595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 16695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} .= "DB\t0F3h,0C3h\t\t;repret"; 16795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} =~ /^(pop|push)f/) { 16895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} .= $self->{sz}; 16995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{op} eq "call" && $current_segment eq ".CRT\$XCU") { 17095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op} = "\tDQ"; 17195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 17295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op}; 17395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 17495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 17595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub mnemonic { 17695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self=shift; 17795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $op=shift; 17895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op}=$op if (defined($op)); 17995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{op}; 18095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 18195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 18295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package const; # pick up constants, which start with $ 18395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 18495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; # single instance in enough... 18595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 18695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 18795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 18895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /^\$([^,]+)/) { 18995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $1; 19095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 19195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 19295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 19395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 19495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 19595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 19695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 19795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 19895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { 19995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # Solaris /usr/ccs/bin/as can't handle multiplications 20095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # in $self->{value} 20195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/(?<![\w\$\.])(0x?[0-9a-f]+)/oct($1)/egi; 20295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; 20395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "\$%s",$self->{value}; 20495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 20595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/(0b[0-1]+)/oct($1)/eig; 20695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/0x([0-9a-f]+)/0$1h/ig if ($masm); 20795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s",$self->{value}; 20895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 20995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 21095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 21195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package ea; # pick up effective addresses: expr(%reg,%reg,scale) 21295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 21395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; # single instance in enough... 21495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 21595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 21695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 21795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # optional * ---vvv--- appears in indirect jmp/call 21895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /^(\*?)([^\(,]*)\(([%\w,]+)\)/) { 21995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{asterisk} = $1; 22095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} = $2; 22195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ($self->{base},$self->{index},$self->{scale})=split(/,/,$3); 22295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{scale} = 1 if (!defined($self->{scale})); 22395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 22495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 22595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 22695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($win64 && $self->{label} =~ s/\@GOTPCREL//) { 22795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley die if (opcode->mnemonic() ne "mov"); 22895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley opcode->mnemonic("lea"); 22995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 23095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base} =~ s/^%//; 23195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{index} =~ s/^%// if (defined($self->{index})); 23295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 23395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 23495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 23595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub size {} 23695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 23795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 23895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $sz = shift; 23995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 24095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; 24195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/\.L/$decor/g; 24295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 24395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # Silently convert all EAs to 64-bit. This is required for 24495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # elder GNU assembler and results in more compact code, 24595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # *but* most importantly AES module depends on this feature! 24695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{index} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/; 24795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/; 24895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 24995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # Solaris /usr/ccs/bin/as can't handle multiplications 25095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # in $self->{label}, new gas requires sign extension... 25195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley use integer; 25295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/(?<![\w\$\.])(0x?[0-9a-f]+)/oct($1)/egi; 25395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/\b([0-9]+\s*[\*\/\%]\s*[0-9]+)\b/eval($1)/eg; 25495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/\b([0-9]+)\b/$1<<32>>32/eg; 25595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 25695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!$self->{label} && $self->{index} && $self->{scale}==1 && 25795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base} =~ /(rbp|r13)/) { 25895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base} = $self->{index}; $self->{index} = $1; 25995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 26095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 26195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { 26295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/^___imp_/__imp__/ if ($flavour eq "mingw64"); 26395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 26495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (defined($self->{index})) { 26595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s%s(%s,%%%s,%d)",$self->{asterisk}, 26695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label}, 26795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base}?"%$self->{base}":"", 26895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{index},$self->{scale}; 26995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 27095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s%s(%%%s)", $self->{asterisk},$self->{label},$self->{base}; 27195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 27295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 2734b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley %szmap = ( b=>"BYTE$PTR", w=>"WORD$PTR", 2744b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley l=>"DWORD$PTR", d=>"DWORD$PTR", 2754b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley q=>"QWORD$PTR", o=>"OWORD$PTR", 2764b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley x=>"XMMWORD$PTR", y=>"YMMWORD$PTR", z=>"ZMMWORD$PTR" ); 27795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 27895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/\./\$/g; 27995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} =~ s/(?<![\w\$\.])0x([0-9a-f]+)/0$1h/ig; 28095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label} = "($self->{label})" if ($self->{label} =~ /[\*\+\-\/]/); 2814b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley 2824b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley ($self->{asterisk}) && ($sz="q") || 2834b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley (opcode->mnemonic() =~ /^v?mov([qd])$/) && ($sz=$1) || 2844b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley (opcode->mnemonic() =~ /^v?pinsr([qdwb])$/) && ($sz=$1) || 2854b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley (opcode->mnemonic() =~ /^vpbroadcast([qdwb])$/) && ($sz=$1) || 2864b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley (opcode->mnemonic() =~ /^vinsert[fi]128$/) && ($sz="x"); 28795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 28895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (defined($self->{index})) { 28995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s[%s%s*%d%s]",$szmap{$sz}, 29095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label}?"$self->{label}+":"", 29195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{index},$self->{scale}, 29295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base}?"+$self->{base}":""; 29395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{base} eq "rip") { 29495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s[%s]",$szmap{$sz},$self->{label}; 29595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 29695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sprintf "%s[%s%s]",$szmap{$sz}, 29795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{label}?"$self->{label}+":"", 29895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{base}; 29995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 30095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 30195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 30295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 30395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package register; # pick up registers, which start with %. 30495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 30595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $class = shift; # muliple instances... 30695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = {}; 30795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 30895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 30995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 31095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # optional * ---vvv--- appears in indirect jmp/call 31195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /^(\*?)%(\w+)/) { 31295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley bless $self,$class; 31395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{asterisk} = $1; 31495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $2; 31595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 31695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 31795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 31895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 31995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 32095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub size { 32195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 32295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 32395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 32495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($self->{value} =~ /^r[\d]+b$/i) { $ret="b"; } 32595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^r[\d]+w$/i) { $ret="w"; } 32695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^r[\d]+d$/i) { $ret="l"; } 32795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^r[\w]+$/i) { $ret="q"; } 32895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^[a-d][hl]$/i){ $ret="b"; } 32995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^[\w]{2}l$/i) { $ret="b"; } 33095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^[\w]{2}$/i) { $ret="w"; } 33195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($self->{value} =~ /^e[a-z]{2}$/i){ $ret="l"; } 33295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 33395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 33495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 33595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 33695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 33795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { sprintf "%s%%%s",$self->{asterisk},$self->{value}; } 33895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else { $self->{value}; } 33995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 34095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 34195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package label; # pick up labels, which end with : 34295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 34395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; # single instance is enough... 34495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 34595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 34695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 34795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /(^[\.\w]+)\:/) { 34895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $1; 34995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 35095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 35195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 35295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/^\.L/$decor/; 35395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 35495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 35595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 35695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 35795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 35895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 35995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { 36095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $func = ($globals{$self->{value}} or $self->{value}) . ":"; 36195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($win64 && 36295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{name} eq $self->{value} && 36395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{abi} eq "svr4") { 36495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= "\n"; 36595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %rdi,8(%rsp)\n"; 36695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %rsi,16(%rsp)\n"; 36795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %rsp,%rax\n"; 36895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= "${decor}SEH_begin_$current_function->{name}:\n"; 36995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $narg = $current_function->{narg}; 37095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $narg=6 if (!defined($narg)); 37195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %rcx,%rdi\n" if ($narg>0); 37295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %rdx,%rsi\n" if ($narg>1); 37395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %r8,%rdx\n" if ($narg>2); 37495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq %r9,%rcx\n" if ($narg>3); 37595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq 40(%rsp),%r8\n" if ($narg>4); 37695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " movq 48(%rsp),%r9\n" if ($narg>5); 37795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 37895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func; 37995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($self->{value} ne "$current_function->{name}") { 38095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} .= ":" if ($masm && $ret!~m/^\$/); 38195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} . ":"; 38295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($win64 && $current_function->{abi} eq "svr4") { 38395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $func = "$current_function->{name}" . 38495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ($nasm ? ":" : "\tPROC $current_function->{scope}") . 38595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "\n"; 38695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov QWORD${PTR}[8+rsp],rdi\t;WIN64 prologue\n"; 38795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov QWORD${PTR}[16+rsp],rsi\n"; 38895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov rax,rsp\n"; 38995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= "${decor}SEH_begin_$current_function->{name}:"; 39095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= ":" if ($masm); 39195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= "\n"; 39295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $narg = $current_function->{narg}; 39395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $narg=6 if (!defined($narg)); 39495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov rdi,rcx\n" if ($narg>0); 39595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov rsi,rdx\n" if ($narg>1); 39695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov rdx,r8\n" if ($narg>2); 39795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov rcx,r9\n" if ($narg>3); 39895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov r8,QWORD${PTR}[40+rsp]\n" if ($narg>4); 39995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= " mov r9,QWORD${PTR}[48+rsp]\n" if ($narg>5); 40095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $func .= "\n"; 40195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 40295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "$current_function->{name}". 40395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ($nasm ? ":" : "\tPROC $current_function->{scope}"); 40495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 40595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 40695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 40795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package expr; # pick up expressioins 40895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 40995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; # single instance is enough... 41095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 41195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 41295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 41395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /(^[^,]+)/) { 41495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $1; 41595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 41695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 41795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 41895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/\@PLT// if (!$elf); 41995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; 42095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s/\.L/$decor/g; 42195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 42295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 42395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 42495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 42595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 42695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($nasm && opcode->mnemonic()=~m/^j(?![re]cxz)/) { 42795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "NEAR ".$self->{value}; 42895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 42995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}; 43095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 43195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 43295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 43395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley{ package directive; # pick up directives, which start with . 43495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub re { 43595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; # single instance is enough... 43695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *line = shift; 43795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $ret; 43895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $dir; 43995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my %opcode = # lea 2f-1f(%rip),%dst; 1: nop; 2: 44095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ( "%rax"=>0x01058d48, "%rcx"=>0x010d8d48, 44195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%rdx"=>0x01158d48, "%rbx"=>0x011d8d48, 44295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%rsp"=>0x01258d48, "%rbp"=>0x012d8d48, 44395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%rsi"=>0x01358d48, "%rdi"=>0x013d8d48, 44495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%r8" =>0x01058d4c, "%r9" =>0x010d8d4c, 44595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%r10"=>0x01158d4c, "%r11"=>0x011d8d4c, 44695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%r12"=>0x01258d4c, "%r13"=>0x012d8d4c, 44795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%r14"=>0x01358d4c, "%r15"=>0x013d8d4c ); 44895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 44995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line =~ /^\s*(\.\w+)/) { 45095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $dir = $1; 45195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret = $self; 45295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $self->{value}; 45395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = substr($line,@+[0]); $line =~ s/^\s+//; 45495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 45595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley SWITCH: for ($dir) { 45695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.picmeup/ && do { if ($line =~ /(%r[\w]+)/i) { 45795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $dir="\t.long"; 45895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line=sprintf "0x%x,0x90000000",$opcode{$1}; 45995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 46095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 46195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 46295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.global|\.globl|\.extern/ 46395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley && do { $globals{$line} = $prefix . $line; 46495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = $globals{$line} if ($prefix); 46595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 46695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 46795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.type/ && do { ($sym,$type,$narg) = split(',',$line); 46895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($type eq "\@function") { 46995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $current_function; 47095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{name} = $sym; 47195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{abi} = "svr4"; 47295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{narg} = $narg; 47395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE"; 47495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($type eq "\@abi-omnipotent") { 47595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $current_function; 47695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{name} = $sym; 47795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE"; 47895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 47995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s/\@abi\-omnipotent/\@function/; 48095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s/\@function.*/\@function/; 48195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 48295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 48395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.asciz/ && do { if ($line =~ /^"(.*)"$/) { 48495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $dir = ".byte"; 48595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = join(",",unpack("C*",$1),0); 48695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 48795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 48895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 48995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.rva|\.long|\.quad/ 49095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley && do { $line =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei; 49195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s/\.L/$decor/g; 49295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 49395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 49495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 49595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 49695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { 49795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $dir . "\t" . $line; 49895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 49995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($dir =~ /\.extern/) { 50095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = ""; # swallow extern 50195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif (!$elf && $dir =~ /\.type/) { 50295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = ""; 50395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = ".def\t" . ($globals{$1} or $1) . ";\t" . 50495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (defined($globals{$1})?".scl 2;":".scl 3;") . 50595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "\t.type 32;\t.endef" 50695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($win64 && $line =~ /([^,]+),\@function/); 50795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif (!$elf && $dir =~ /\.size/) { 50895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = ""; 50995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (defined($current_function)) { 51095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} .= "${decor}SEH_end_$current_function->{name}:" 51195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($win64 && $current_function->{abi} eq "svr4"); 51295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $current_function; 51395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 51495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif (!$elf && $dir =~ /\.align/) { 51595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = ".p2align\t" . (log($line)/log(2)); 51695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($dir eq ".section") { 51795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_segment=$line; 51895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!$elf && $current_segment eq ".init") { 51995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($flavour eq "macosx") { $self->{value} = ".mod_init_func"; } 52095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($flavour eq "mingw64") { $self->{value} = ".section\t.ctors"; } 52195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 52295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($dir =~ /\.(text|data)/) { 52395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_segment=".$1"; 524eb7d2ed1fe8a33b3e3871502ba7e12efaf94360cAdam Langley } elsif ($dir =~ /\.global|\.globl|\.extern/) { 525eb7d2ed1fe8a33b3e3871502ba7e12efaf94360cAdam Langley if ($flavour eq "macosx") { 526eb7d2ed1fe8a33b3e3871502ba7e12efaf94360cAdam Langley $self->{value} .= "\n.private_extern $line"; 527eb7d2ed1fe8a33b3e3871502ba7e12efaf94360cAdam Langley } else { 528eb7d2ed1fe8a33b3e3871502ba7e12efaf94360cAdam Langley $self->{value} .= "\n.hidden $line"; 529eb7d2ed1fe8a33b3e3871502ba7e12efaf94360cAdam Langley } 53095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($dir =~ /\.hidden/) { 53195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($flavour eq "macosx") { $self->{value} = ".private_extern\t$prefix$line"; } 53295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($flavour eq "mingw64") { $self->{value} = ""; } 53395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($dir =~ /\.comm/) { 53495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = "$dir\t$prefix$line"; 53595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} =~ s|,([0-9]+),([0-9]+)$|",$1,".log($2)/log(2)|e if ($flavour eq "macosx"); 53695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 53795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = ""; 53895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return $self; 53995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 54095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 54195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # non-gas case or nasm/masm 54295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley SWITCH: for ($dir) { 54395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.text/ && do { my $v=undef; 54495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($nasm) { 54595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="section .text code align=64\n"; 54695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 54795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="$current_segment\tENDS\n" if ($current_segment); 54895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_segment = ".text\$"; 54995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.="$current_segment\tSEGMENT "; 5504b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley $v.=$masm>=$masmref ? "ALIGN(256)" : "PAGE"; 55195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=" 'CODE'"; 55295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 55395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $v; 55495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 55595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 55695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.data/ && do { my $v=undef; 55795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($nasm) { 55895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="section .data data align=8\n"; 55995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 56095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="$current_segment\tENDS\n" if ($current_segment); 56195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_segment = "_DATA"; 56295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.="$current_segment\tSEGMENT"; 56395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 56495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $v; 56595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 56695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 56795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.section/ && do { my $v=undef; 56895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s/([^,]*).*/$1/; 56995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = ".CRT\$XCU" if ($line eq ".init"); 57095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($nasm) { 57195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="section $line"; 57295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line=~/\.([px])data/) { 57395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=" rdata align="; 57495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=$1 eq "p"? 4 : 8; 57595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($line=~/\.CRT\$/i) { 57695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=" rdata align=8"; 57795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 57895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 57995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="$current_segment\tENDS\n" if ($current_segment); 58095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.="$line\tSEGMENT"; 58195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($line=~/\.([px])data/) { 58295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=" READONLY"; 58395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=" ALIGN(".($1 eq "p" ? 4 : 8).")" if ($masm>=$masmref); 58495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($line=~/\.CRT\$/i) { 58595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=" READONLY "; 58695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.=$masm>=$masmref ? "ALIGN(8)" : "DWORD"; 58795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 58895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 58995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_segment = $line; 59095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $v; 59195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 59295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 59395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.extern/ && do { $self->{value} = "EXTERN\t".$line; 59495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} .= ":NEAR" if ($masm); 59595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 59695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 59795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.globl|.global/ 59895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley && do { $self->{value} = $masm?"PUBLIC":"global"; 59995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} .= "\t".$line; 60095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 60195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 60295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.size/ && do { if (defined($current_function)) { 60395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $self->{value}; 60495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($current_function->{abi} eq "svr4") { 60595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}="${decor}SEH_end_$current_function->{name}:"; 60695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}.=":\n" if($masm); 60795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 60895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}.="$current_function->{name}\tENDP" if($masm && $current_function->{name}); 60995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $current_function; 61095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 61195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 61295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 61395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; }; 61495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.(value|long|rva|quad)/ 61595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley && do { my $sz = substr($1,0,1); 61695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @arr = split(/,\s*/,$line); 61795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $last = pop(@arr); 61895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $conv = sub { my $var=shift; 61995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $var=~s/^(0b[0-1]+)/oct($1)/eig; 62095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $var=~s/^0x([0-9a-f]+)/0$1h/ig if ($masm); 62195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($sz eq "D" && ($current_segment=~/.[px]data/ || $dir eq ".rva")) 62295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley { $var=~s/([_a-z\$\@][_a-z0-9\$\@]*)/$nasm?"$1 wrt ..imagebase":"imagerel $1"/egi; } 62395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $var; 62495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 62595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 62695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $sz =~ tr/bvlrq/BWDDQ/; 62795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = "\tD$sz\t"; 62895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for (@arr) { $self->{value} .= &$conv($_).","; } 62995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} .= &$conv($last); 63095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 63195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 63295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.byte/ && do { my @str=split(/,\s*/,$line); 63395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley map(s/(0b[0-1]+)/oct($1)/eig,@str); 63495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley map(s/0x([0-9a-f]+)/0$1h/ig,@str) if ($masm); 63595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley while ($#str>15) { 63695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}.="DB\t" 63795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley .join(",",@str[0..15])."\n"; 63895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley foreach (0..15) { shift @str; } 63995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 64095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}.="DB\t" 64195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley .join(",",@str) if (@str); 64295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 64395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 64495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /\.comm/ && do { my @str=split(/,\s*/,$line); 64595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $v=undef; 64695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($nasm) { 64795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.="common $prefix@str[0] @str[1]"; 64895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 64995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v="$current_segment\tENDS\n" if ($current_segment); 65095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $current_segment = "_DATA"; 65195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.="$current_segment\tSEGMENT\n"; 65295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $v.="COMM @str[0]:DWORD:".@str[1]/4; 65395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 65495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value} = $v; 65595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last; 65695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley }; 65795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 65895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line = ""; 65995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 66095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 66195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $ret; 66295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 66395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley sub out { 66495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $self = shift; 66595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $self->{value}; 66695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 66795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 66895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 66995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleysub rex { 67095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *opcode=shift; 67195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my ($dst,$src,$rex)=@_; 67295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 67395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $rex|=0x04 if($dst>=8); 67495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $rex|=0x01 if($src>=8); 67595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,($rex|0x40) if ($rex); 67695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 67795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 67895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# older gas and ml64 don't handle SSE>2 instructions 67995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy %regrm = ( "%eax"=>0, "%ecx"=>1, "%edx"=>2, "%ebx"=>3, 68095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley "%esp"=>4, "%ebp"=>5, "%esi"=>6, "%edi"=>7 ); 68195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 68295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $movq = sub { # elderly gas can't handle inter-register movq 68395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $arg = shift; 68495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x66); 68595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($arg =~ /%xmm([0-9]+),\s*%r(\w+)/) { 68695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my ($src,$dst)=($1,$2); 68795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($dst !~ /[0-9]+/) { $dst = $regrm{"%e$dst"}; } 68895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$src,$dst,0x8); 68995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x7e; 69095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|(($src&7)<<3)|($dst&7); # ModR/M 69195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 69295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($arg =~ /%r(\w+),\s*%xmm([0-9]+)/) { 69395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my ($src,$dst)=($2,$1); 69495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($dst !~ /[0-9]+/) { $dst = $regrm{"%e$dst"}; } 69595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$src,$dst,0x8); 69695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x6e; 69795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|(($src&7)<<3)|($dst&7); # ModR/M 69895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 69995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 70095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 70195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 70295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 70395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 70495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $pextrd = sub { 70595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /\$([0-9]+),\s*%xmm([0-9]+),\s*(%\w+)/) { 70695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x66); 70795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $imm=$1; 70895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $src=$2; 70995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $dst=$3; 71095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($dst =~ /%r([0-9]+)d/) { $dst = $1; } 71195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($dst =~ /%e/) { $dst = $regrm{$dst}; } 71295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$src,$dst); 71395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x3a,0x16; 71495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|(($src&7)<<3)|($dst&7); # ModR/M 71595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$imm; 71695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 71795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 71895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 71995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 72095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 72195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 72295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $pinsrd = sub { 72395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /\$([0-9]+),\s*(%\w+),\s*%xmm([0-9]+)/) { 72495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x66); 72595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $imm=$1; 72695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $src=$2; 72795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $dst=$3; 72895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($src =~ /%r([0-9]+)/) { $src = $1; } 72995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($src =~ /%e/) { $src = $regrm{$src}; } 73095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$dst,$src); 73195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x3a,0x22; 73295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|(($dst&7)<<3)|($src&7); # ModR/M 73395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$imm; 73495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 73595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 73695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 73795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 73895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 73995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 74095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $pshufb = sub { 74195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /%xmm([0-9]+),\s*%xmm([0-9]+)/) { 74295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x66); 74395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$2,$1); 74495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x38,0x00; 74595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|($1&7)|(($2&7)<<3); # ModR/M 74695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 74795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 74895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 74995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 75095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 75195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 75295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $palignr = sub { 75395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /\$([0-9]+),\s*%xmm([0-9]+),\s*%xmm([0-9]+)/) { 75495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x66); 75595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$3,$2); 75695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x3a,0x0f; 75795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|($2&7)|(($3&7)<<3); # ModR/M 75895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$1; 75995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 76095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 76195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 76295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 76395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 76495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 76595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $pclmulqdq = sub { 76695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /\$([x0-9a-f]+),\s*%xmm([0-9]+),\s*%xmm([0-9]+)/) { 76795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x66); 76895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,$3,$2); 76995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0x3a,0x44; 77095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|($2&7)|(($3&7)<<3); # ModR/M 77195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $c=$1; 77295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$c=~/^0/?oct($c):$c; 77395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 77495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 77595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 77695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 77795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 77895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 77995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $rdrand = sub { 78095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /%[er](\w+)/) { 78195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(); 78295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $dst=$1; 78395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($dst !~ /[0-9]+/) { $dst = $regrm{"%e$dst"}; } 78495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rex(\@opcode,0,$1,8); 78595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x0f,0xc7,0xf0|($dst&7); 78695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 78795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 78895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 78995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 79095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 79195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 7924b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langleymy $rdseed = sub { 7934b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley if (shift =~ /%[er](\w+)/) { 7944b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley my @opcode=(); 7954b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley my $dst=$1; 7964b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley if ($dst !~ /[0-9]+/) { $dst = $regrm{"%e$dst"}; } 7974b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley rex(\@opcode,0,$1,8); 7984b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley push @opcode,0x0f,0xc7,0xf8|($dst&7); 7994b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley @opcode; 8004b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley } else { 8014b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley (); 8024b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley } 8034b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley}; 8044b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley 80595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleysub rxb { 80695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley local *opcode=shift; 80795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my ($dst,$src1,$src2,$rxb)=@_; 80895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 80995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $rxb|=0x7<<5; 81095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $rxb&=~(0x04<<5) if($dst>=8); 81195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $rxb&=~(0x01<<5) if($src1>=8); 81295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $rxb&=~(0x02<<5) if($src2>=8); 81395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$rxb; 81495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 81595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 81695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $vprotd = sub { 81795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /\$([x0-9a-f]+),\s*%xmm([0-9]+),\s*%xmm([0-9]+)/) { 81895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x8f); 81995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rxb(\@opcode,$3,$2,-1,0x08); 82095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x78,0xc2; 82195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|($2&7)|(($3&7)<<3); # ModR/M 82295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $c=$1; 82395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$c=~/^0/?oct($c):$c; 82495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 82595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 82695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 82795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 82895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 82995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 83095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleymy $vprotq = sub { 83195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (shift =~ /\$([x0-9a-f]+),\s*%xmm([0-9]+),\s*%xmm([0-9]+)/) { 83295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my @opcode=(0x8f); 83395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rxb(\@opcode,$3,$2,-1,0x08); 83495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0x78,0xc3; 83595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,0xc0|($2&7)|(($3&7)<<3); # ModR/M 83695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $c=$1; 83795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @opcode,$c=~/^0/?oct($c):$c; 83895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @opcode; 83995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 84095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley (); 84195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 84295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley}; 84395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 84495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyif ($nasm) { 84595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley print <<___; 84695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleydefault rel 84795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley%define XMMWORD 8484b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley%define YMMWORD 8494b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley%define ZMMWORD 85095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley___ 85195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} elsif ($masm) { 85295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley print <<___; 85395c29f3cd1f6c08c6c0927868683392eea727ccAdam LangleyOPTION DOTNAME 85495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley___ 85595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 85695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 85795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyprint STDOUT "#if defined(__x86_64__)\n" if ($gas); 85895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 85995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleywhile($line=<>) { 86095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 86195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley chomp($line); 86295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 86395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s|[#!].*$||; # get rid of asm-style comments... 86495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s|/\*.*\*/||; # ... and C-style comments... 86595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s|^\s+||; # ... and skip white spaces in beginning 86695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s|\s+$||; # ... and at the end 86795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 86895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $label; 86995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $opcode; 87095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef @args; 87195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 87295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($label=label->re(\$line)) { print $label->out(); } 87395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 87495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (directive->re(\$line)) { 87595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley printf "%s",directive->out(); 87695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } elsif ($opcode=opcode->re(\$line)) { 87795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $asm = eval("\$".$opcode->mnemonic()); 87895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef @bytes; 87995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 88095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((ref($asm) eq 'CODE') && scalar(@bytes=&$asm($line))) { 88195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley print $gas?".byte\t":"DB\t",join(',',@bytes),"\n"; 88295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley next; 88395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 88495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 88595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ARGUMENT: while (1) { 88695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $arg; 88795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 88895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($arg=register->re(\$line)) { opcode->size($arg->size()); } 88995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($arg=const->re(\$line)) { } 89095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($arg=ea->re(\$line)) { } 89195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley elsif ($arg=expr->re(\$line)) { } 89295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley else { last ARGUMENT; } 89395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 89495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley push @args,$arg; 89595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 89695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley last ARGUMENT if ($line !~ /^,/); 89795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 89895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $line =~ s/^,\s*//; 89995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } # ARGUMENT: 90095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 90195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($#args>=0) { 90295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $insn; 90395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $sz=opcode->size(); 90495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 90595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($gas) { 90695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $insn = $opcode->out($#args>=1?$args[$#args]->size():$sz); 90795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @args = map($_->out($sz),@args); 90895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley printf "\t%s\t%s",$insn,join(",",@args); 90995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 91095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley $insn = $opcode->out(); 91195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley foreach (@args) { 91295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley my $arg = $_->out(); 91395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley # $insn.=$sz compensates for movq, pinsrw, ... 91495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($arg =~ /^xmm[0-9]+$/) { $insn.=$sz; $sz="x" if(!$sz); last; } 91595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($arg =~ /^ymm[0-9]+$/) { $insn.=$sz; $sz="y" if(!$sz); last; } 9164b5979b3fa02446964fdc1cff7ff972fa796e17dAdam Langley if ($arg =~ /^zmm[0-9]+$/) { $insn.=$sz; $sz="z" if(!$sz); last; } 91795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ($arg =~ /^mm[0-9]+$/) { $insn.=$sz; $sz="q" if(!$sz); last; } 91895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 91995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley @args = reverse(@args); 92095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley undef $sz if ($nasm && $opcode->mnemonic() eq "lea"); 921ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley 922ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley if ($insn eq "movq" && $#args == 1 && $args[0]->out($sz) eq "xmm0" && $args[1]->out($sz) eq "rax") { 923ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley # I have no clue why MASM can't parse this instruction. 924ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley printf "DB 66h, 48h, 0fh, 6eh, 0c0h"; 925ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley } else { 926ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley printf "\t%s\t%s",$insn,join(",",map($_->out($sz),@args)); 927ded93581f1674f81faa0dba4b15a842756066ab2Adam Langley } 92895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 92995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 93095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley printf "\t%s",$opcode->out(); 93195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 93295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 93395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 93495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley print $line,"\n"; 93595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 93695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 93795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyprint "\n$current_segment\tENDS\n" if ($current_segment && $masm); 93895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyprint "END\n" if ($masm); 9391195796045e1f8bbd1ed311b2cbd8b9d87f2074aDavid Benjaminprint "#endif\n" if ($gas); 94095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 94195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 94295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyclose STDOUT; 94395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 94495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley################################################# 94595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Cross-reference x86_64 ABI "card" 94695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 94795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Unix Win64 94895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rax * * 94995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rbx - - 95095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rcx #4 #1 95195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rdx #3 #2 95295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rsi #2 - 95395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rdi #1 - 95495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rbp - - 95595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rsp - - 95695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r8 #5 #3 95795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r9 #6 #4 95895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r10 * * 95995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r11 * * 96095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r12 - - 96195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r13 - - 96295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r14 - - 96395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %r15 - - 96495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 96595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# (*) volatile register 96695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# (-) preserved by callee 96795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# (#) Nth argument, volatile 96895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 96995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# In Unix terms top of stack is argument transfer area for arguments 97095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# which could not be accomodated in registers. Or in other words 7th 97195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# [integer] argument resides at 8(%rsp) upon function entry point. 97295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 128 bytes above %rsp constitute a "red zone" which is not touched 97395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# by signal handlers and can be used as temporal storage without 97495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# allocating a frame. 97595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 97695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# In Win64 terms N*8 bytes on top of stack is argument transfer area, 97795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# which belongs to/can be overwritten by callee. N is the number of 97895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# arguments passed to callee, *but* not less than 4! This means that 97995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# upon function entry point 5th argument resides at 40(%rsp), as well 98095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# as that 32 bytes from 8(%rsp) can always be used as temporal 98195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# storage [without allocating a frame]. One can actually argue that 98295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# one can assume a "red zone" above stack pointer under Win64 as well. 98395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Point is that at apparently no occasion Windows kernel would alter 98495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# the area above user stack pointer in true asynchronous manner... 98595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 98695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# All the above means that if assembler programmer adheres to Unix 98795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# register and stack layout, but disregards the "red zone" existense, 98895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# it's possible to use following prologue and epilogue to "gear" from 98995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Unix to Win64 ABI in leaf functions with not more than 6 arguments. 99095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 99195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# omnipotent_function: 99295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ifdef WIN64 99395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rdi,8(%rsp) 99495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rsi,16(%rsp) 99595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rcx,%rdi ; if 1st argument is actually present 99695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rdx,%rsi ; if 2nd argument is actually ... 99795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %r8,%rdx ; if 3rd argument is ... 99895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %r9,%rcx ; if 4th argument ... 99995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq 40(%rsp),%r8 ; if 5th ... 100095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq 48(%rsp),%r9 ; if 6th ... 100195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# endif 100295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ... 100395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ifdef WIN64 100495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq 8(%rsp),%rdi 100595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq 16(%rsp),%rsi 100695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# endif 100795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ret 100895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 100995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley################################################# 101095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Win64 SEH, Structured Exception Handling. 101195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 101295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Unlike on Unix systems(*) lack of Win64 stack unwinding information 101395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# has undesired side-effect at run-time: if an exception is raised in 101495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# assembler subroutine such as those in question (basically we're 101595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# referring to segmentation violations caused by malformed input 101695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# parameters), the application is briskly terminated without invoking 101795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# any exception handlers, most notably without generating memory dump 101895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# or any user notification whatsoever. This poses a problem. It's 101995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# possible to address it by registering custom language-specific 102095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# handler that would restore processor context to the state at 102195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# subroutine entry point and return "exception is not handled, keep 102295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# unwinding" code. Writing such handler can be a challenge... But it's 102395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# doable, though requires certain coding convention. Consider following 102495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# snippet: 102595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 102695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .type function,@function 102795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# function: 102895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rsp,%rax # copy rsp to volatile register 102995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# pushq %r15 # save non-volatile registers 103095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# pushq %rbx 103195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# pushq %rbp 103295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rsp,%r11 103395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# subq %rdi,%r11 # prepare [variable] stack frame 103495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# andq $-64,%r11 103595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rax,0(%r11) # check for exceptions 103695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %r11,%rsp # allocate [variable] stack frame 103795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rax,0(%rsp) # save original rsp value 103895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# magic_point: 103995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ... 104095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq 0(%rsp),%rcx # pull original rsp value 104195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq -24(%rcx),%rbp # restore non-volatile registers 104295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq -16(%rcx),%rbx 104395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq -8(%rcx),%r15 104495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# movq %rcx,%rsp # restore original rsp 104595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ret 104695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .size function,.-function 104795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 104895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# The key is that up to magic_point copy of original rsp value remains 104995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# in chosen volatile register and no non-volatile register, except for 105095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# rsp, is modified. While past magic_point rsp remains constant till 105195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# the very end of the function. In this case custom language-specific 105295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# exception handler would look like this: 105395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 105495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame, 105595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT *context,DISPATCHER_CONTEXT *disp) 105695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# { ULONG64 *rsp = (ULONG64 *)context->Rax; 105795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# if (context->Rip >= magic_point) 105895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# { rsp = ((ULONG64 **)context->Rsp)[0]; 105995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# context->Rbp = rsp[-3]; 106095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# context->Rbx = rsp[-2]; 106195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# context->R15 = rsp[-1]; 106295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# } 106395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# context->Rsp = (ULONG64)rsp; 106495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# context->Rdi = rsp[1]; 106595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# context->Rsi = rsp[2]; 106695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 106795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# memcpy (disp->ContextRecord,context,sizeof(CONTEXT)); 106895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# RtlVirtualUnwind(UNW_FLAG_NHANDLER,disp->ImageBase, 106995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# dips->ControlPc,disp->FunctionEntry,disp->ContextRecord, 107095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# &disp->HandlerData,&disp->EstablisherFrame,NULL); 107195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# return ExceptionContinueSearch; 107295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# } 107395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 107495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# It's appropriate to implement this handler in assembler, directly in 107595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# function's module. In order to do that one has to know members' 107695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# offsets in CONTEXT and DISPATCHER_CONTEXT structures and some constant 107795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# values. Here they are: 107895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 107995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rax 120 108095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rcx 128 108195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rdx 136 108295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rbx 144 108395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rsp 152 108495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rbp 160 108595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rsi 168 108695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rdi 176 108795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R8 184 108895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R9 192 108995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R10 200 109095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R11 208 109195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R12 216 109295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R13 224 109395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R14 232 109495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.R15 240 109595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Rip 248 109695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# CONTEXT.Xmm6 512 109795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# sizeof(CONTEXT) 1232 109895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.ControlPc 0 109995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.ImageBase 8 110095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.FunctionEntry 16 110195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.EstablisherFrame 24 110295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.TargetIp 32 110395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.ContextRecord 40 110495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.LanguageHandler 48 110595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# DISPATCHER_CONTEXT.HandlerData 56 110695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# UNW_FLAG_NHANDLER 0 110795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# ExceptionContinueSearch 1 110895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 110995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# In order to tie the handler to the function one has to compose 111095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# couple of structures: one for .xdata segment and one for .pdata. 111195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 111295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# UNWIND_INFO structure for .xdata segment would be 111395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 111495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# function_unwind_info: 111595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .byte 9,0,0,0 111695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .rva handler 111795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 111895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# This structure designates exception handler for a function with 111995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# zero-length prologue, no stack frame or frame register. 112095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 112195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# To facilitate composing of .pdata structures, auto-generated "gear" 112295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# prologue copies rsp value to rax and denotes next instruction with 112395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .LSEH_begin_{function_name} label. This essentially defines the SEH 112495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# styling rule mentioned in the beginning. Position of this label is 112595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# chosen in such manner that possible exceptions raised in the "gear" 112695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# prologue would be accounted to caller and unwound from latter's frame. 112795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# End of function is marked with respective .LSEH_end_{function_name} 112895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# label. To summarize, .pdata segment would contain 112995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 113095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .rva .LSEH_begin_function 113195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .rva .LSEH_end_function 113295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .rva function_unwind_info 113395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 113495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Reference to functon_unwind_info from .xdata segment is the anchor. 113595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# In case you wonder why references are 32-bit .rvas and not 64-bit 113695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# .quads. References put into these two segments are required to be 113795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# *relative* to the base address of the current binary module, a.k.a. 113895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# image base. No Win64 module, be it .exe or .dll, can be larger than 113995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 2GB and thus such relative references can be and are accommodated in 114095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 32 bits. 114195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 114295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Having reviewed the example function code, one can argue that "movq 114395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# %rsp,%rax" above is redundant. It is not! Keep in mind that on Unix 114495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# rax would contain an undefined value. If this "offends" you, use 114595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# another register and refrain from modifying rax till magic_point is 114695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# reached, i.e. as if it was a non-volatile register. If more registers 114795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# are required prior [variable] frame setup is completed, note that 114895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# nobody says that you can have only one "magic point." You can 114995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# "liberate" non-volatile registers by denoting last stack off-load 115095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# instruction and reflecting it in finer grade unwind logic in handler. 115195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# After all, isn't it why it's called *language-specific* handler... 115295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 115395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Attentive reader can notice that exceptions would be mishandled in 115495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# auto-generated "gear" epilogue. Well, exception effectively can't 115595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# occur there, because if memory area used by it was subject to 115695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# segmentation violation, then it would be raised upon call to the 115795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# function (and as already mentioned be accounted to caller, which is 115895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# not a problem). If you're still not comfortable, then define tail 115995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# "magic point" just prior ret instruction and have handler treat it... 116095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# 116195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# (*) Note that we're talking about run-time, not debug-time. Lack of 116295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# unwind information makes debugging hard on both Windows and 116395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# Unix. "Unlike" referes to the fact that on Unix signal handler 116495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# will always be invoked, core dumped and appropriate exit code 116595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley# returned to parent (for user notification). 1166