diff options
Diffstat (limited to 'Master/tlpkg/tlperl.straw/lib/Win32/Exe/Section.pm')
-rwxr-xr-x | Master/tlpkg/tlperl.straw/lib/Win32/Exe/Section.pm | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl.straw/lib/Win32/Exe/Section.pm b/Master/tlpkg/tlperl.straw/lib/Win32/Exe/Section.pm new file mode 100755 index 00000000000..d08f91590f7 --- /dev/null +++ b/Master/tlpkg/tlperl.straw/lib/Win32/Exe/Section.pm @@ -0,0 +1,154 @@ +# $File: //local/member/autrijus/Win32-Exe/lib/Win32/Exe/Section.pm $ $Author: autrijus $ +# $Revision: #9 $ $Change: 1130 $ $Date: 2004-02-17T15:40:29.640821Z $ + +package Win32::Exe::Section; + +use strict; +use base 'Win32::Exe::Base'; +use constant FORMAT => ( + Name => 'Z8', + VirtualSize => 'V', + VirtualAddress => 'V', + FileSize => 'V', + FileOffset => 'V', + RelocOffset => 'V', + LineNumOffset => 'V', + NumReloc => 'v', + NumLineNum => 'v', + Flags => 'V', +); +use constant DISPATCH_FIELD => 'Name'; +use constant DISPATCH_TABLE => ( + '.text' => 'Section::Code', + '.debug' => 'Section::Debug', + '.data' => 'Section::Data', + '.rdata' => 'Section::Data', + '.bss' => 'Section::Data', + '.edata' => 'Section::Exports', + '.idata' => 'Section::Imports', + '.rsrc' => 'Section::Resources', +); + +use constant CONTAINS_CODE => 0x20; +use constant CONTAINS_IDATA => 0x40; +use constant CONTAINS_UDATA => 0x80; + +sub Data { + my ($self) = @_; + $self->{data} ||= do { + my $v_size = $self->VirtualSize; + my $f_size = $self->FileSize or return("\0" x $v_size); + + $f_size = $v_size if $v_size < $f_size; + + my $data = $self->parent->substr($self->FileOffset, $f_size); + $data .= ("\x0" x ($v_size - length($data))); + $data; + } +} + +sub SetData { + my ($self, $data) = @_; + my $pad_size = length($1) if $data =~ s/(\0*)\z//; + + my $exe = $self->parent; + $exe->OptHeaderSize == 224 or die "Unsupported binary format"; + + my $index = $self->sibling_index; + my $data_size = length($data); + + my $f_size = $self->align($data_size, $exe->FileAlign); + my $v_size = $self->align($data_size, $exe->SectionAlign); + my $f_extra = $f_size - $self->FileSize; + my $v_extra = $v_size - $self->align($self->VirtualSize, $exe->SectionAlign); + + $self->pad_data($f_extra, $v_extra) if $f_extra; + + $self->SetVirtualSize($data_size + $pad_size); + $data .= ("\0" x ($self->FileSize - $data_size)); + + $exe->substr($self->FileOffset, length($data), $data); + $self->update_size; +} + +sub update_size { + my ($self) = @_; + + my $exe = $self->parent; + my $v_addr = $self->VirtualAddress; + my $v_size = $self->VirtualSize; + + foreach my $dir ($exe->data_directories) { + next unless $dir->VirtualAddress == $v_addr; + $dir->SetSize($v_size); + $dir->refresh; + } +} + +sub pad_data { + my ($self, $f_extra, $v_extra) = @_; + + my $exe = $self->parent; + my $offset = $self->FileOffset + $self->FileSize; + + $exe->update_debug_directory($offset, $f_extra); + + my $exe_size = $exe->size; + if ($exe_size > $offset) { + my $buf = $exe->substr($offset, ($exe_size - $offset)); + $exe->substr($offset + $f_extra, length($buf), $buf); + } + + $exe->set_size($exe_size + $f_extra); + if ($f_extra > 0) { + $exe->SetData($exe->Data . ("\0" x $f_extra)); + } + else { + $exe->SetData(substr($exe->Data, 0, $f_extra)); + } + + my $index = $self->sibling_index; + foreach my $section (@{$self->siblings}) { + next if $section->sibling_index <= $index; + $section->update_offset($f_extra, $v_extra); + } + + $self->SetFileSize($self->FileSize + $f_extra); + $exe->SetImageSize($exe->ImageSize + $v_extra); + + my $flags = $self->Flags; + $exe->SetCodeSize($exe->CodeSize + $f_extra) if $flags & CONTAINS_CODE; + $exe->SetIDataSize($exe->IDataSize + $f_extra) if $flags & CONTAINS_IDATA; + $exe->SetUDataSize($exe->UDataSize + $f_extra) if $flags & CONTAINS_UDATA; +} + +sub update_offset { + my ($self, $f_extra, $v_extra) = @_; + return unless $f_extra > 0; + + my $exe = $self->parent; + my $v_addr = $self->VirtualAddress; + + $self->SetVirtualAddress( $v_addr + $v_extra ); + $self->SetFileOffset( $self->FileOffset + $f_extra ); + + foreach my $dir ($exe->data_directories) { + next unless $dir->VirtualAddress == $v_addr; + $dir->SetVirtualAddress($self->VirtualAddress); + } +} + +sub substr { + my $self = shift; + my $data = $self->Data; + my $offset = shift; + my $length = @_ ? shift(@_) : (length($data) - $offset); + my $replace = shift; + + return substr($data, $offset, $length) if !defined $replace; + + substr($data, $offset, $length, $replace); + $self->SetData($data); +} + +1; |