#! perl
# Fake a PE/COFF header, forcing Windows to load and interpret a perl script,
# better than pl2bat
# Copyright 2005 John Tobey <jtobey@john-edwin-tobey.org>
open IN, (my $name = shift) or die "Syntax: pl2exe.pl file.pl\n";
$name =~ s/\.pl$//;
$name .= '.exe';
open (OUT, ">$name") or die "can\'t write to $name: $!\n";
binmode OUT; # because we want to be in control
print OUT "MZ(<<'EXE_STUFF') # -*-Perl-*-\015\012";
print OUT "Here comes offset 60 .....\015\012";
# The DWORD at offset 60 holds the offset of the IMAGE_NT_HEADERS struct.
# This stuff is in winnt.h.
print OUT pack ("L", 64);
my $code_size = 512; # actually the size of the entire
# code section, which in this case contains
# data as well; rounded up to a multiple of 512
# Construct the IMAGE_NT_HEADERS structure.
my $headers = "PE\0\0"; # Portable Executable signature
$headers .= pack ('SSLLLSS', # the IMAGE_FILE_HEADER substructure
0x14c, # for Intel I386 or later, and compatible
1, # number of sections
0x4d5a83be, # time-date stamp when we created the exe (TODO)
0,0, # symbols pointer, # symbols
224, # size of the IMAGE_OPTIONAL_HEADER
0x010f # random flags: 0xa18e(?) for a DLL
);
$headers .= pack ('SCCL9S6L4SSL6',# IMAGE_OPTIONAL_HEADERS substruct
0x010b, # Magic PE32 : normal 32-bit, 0x0107 would be a ROM image
1,0, # linker version maj.min (that's us)
$code_size,
0,0, # size of initialized/un- data
0x1000, # RVA of entry point
# (the RVA is the address when loaded,
# relative to the image base)
0x1000, # RVA of start of code section
0, # RVA of data section, if there were one
0x400000, # image base
0x1000, # section alignment
512, # file alignment
4, 0, # OS version maj.min
0, 0, # Image version
4, 0, # Subsystem version
0, # reserved1 zero
0x2000, # size of image
512, # size of headers
0, # checksum; ignored
3, # Subsystem 3=console app; 2=GUI app
0, # DLL characteristics (obsolete)
0x1000, # size of stack reserve
0x1000, # size of stack commit
0x100000, # size of heap reserve
0, # size of heap commit
0, # loader flags (obsolete)
16 # the number or RVA/size pairs to follow
);
# DATA directory (16)
$headers .= pack ('L32', # 16 (RVA,size) pairs locating certain
# important image structures; the ones
# we don't have are left zero
0,0, # export directory
0x1100, 195, # import directory
0,0, # resource directory
0,0, # exception table
0,0, # security table
0x10f8, 8, # base relocation table (empty, but needed)
0,0, # debug
0,0, # architecture specific data
0,0, # global pointer
0,0, # TLS dir
0,0, # load config table
0,0, # bound import table
0,0, # import address table
0,0, # delay import descriptor
0,0, # COM descriptor
0,0 # unused
);
print OUT $headers;
# SECTION TABLE, We need to describe our one section.
my $section_header = pack ('a8L8',
'.perl', # section name
464, # raw data size
0x1000, # section begin RVA
512, # rounded-up data size
512, # offset in file
0,0,0, # relocations, line # offs, line #s
0xe0000060, # flags: CODE INITIALIZED_DATA EXECUTE READ WRITE ALIGN_DEFAULT(16)
);
print OUT $section_header;
print OUT "\015\012\015\012";
print OUT "-------------that was the IMAGE_NT_HEADERS struct-------------";
print OUT "\015\012------------------------\015\012";
print OUT "--------Now comes the code (at offset 512, if you please)-----";
print OUT "\015\012\015\012";
# Next comes the code.
# It performs fixups, prepends "perl -x " to the command line,
# launches perl, and returns perl's exit status. See at the end.
print OUT pack ("H*", "b8cc114000833dcc1140000074168b1085d27d06");
print OUT pack ("H*", "01500483c004ff0283c00483380075eaa1481140");
print OUT pack ("H*", "00ffd089c389c731c0b9f7fffffffcf2ae89f829");
print OUT pack ("H*", "d883e1fc01ccbec311400089e7b908000000f3a4");
print OUT pack ("H*", "89de89c1f3a489e383ec7cb91b00000089e731c0");
print OUT pack ("H*", "f3ab895c2404c74424284400000089e083c02889");
print OUT pack ("H*", "44242083c04489442424a140114000ffd021c075");
print OUT pack ("H*", "046a64eb258b4424446aff50a14c114000ffd021");
print OUT pack ("H*", "c074046a65eb0f8b4424446a665450a150114000");
print OUT pack ("H*", "ffd0a144114000ffd0");
print OUT "\015\012\015\012";
print OUT "-------here's the data, at file offset 760: -------";
print OUT "\015\012\015\012";
# Print out a dummy relocation table.
# The code is not relocatable--it must be loaded at 0x400000.
# But to allow programs to load it with LoadLibrary() and access
# its resources, the file must contain this table.
print OUT pack ('LL', 0x1000,8);
# The import table. Contains RVAs and names.
# (we import 5 functions from KERNEL32.DLL)
print OUT pack ('L5', 0x1128, # (unbound IAT)
0, # TimeDateStamp
0, # ForwarderChain
0x1158, # DLL Name RVA
0x1140);# Import Address Table RVA
print OUT pack ('L5', 0,0,0,0,0); # Ordinals of our KERNEL32 names, 0=unused
print OUT pack ('L6', 0x1166, 0x1178, 0x1186, 0x1198, 0x11ae, 0);
# Not sure if we really need to do this twice, but why argue:
print OUT pack ('L6', 0x1166, 0x1178, 0x1186, 0x1198, 0x11ae, 0);
# Gee it would be nice if C<pack> knew how to align things...
print OUT "KERNEL32.DLL\0\0";
print OUT "\0\0CreateProcessA\0\0"; # 1140
print OUT "\0\0ExitProcess\0"; # 1144
print OUT "\0\0GetCommandLineA\0"; # 1148
print OUT "\0\0WaitForSingleObject\0"; # 114c
print OUT "\0\0GetExitCodeProcess\0"; # 1150
# Our initialized data:
print OUT "perl -x \0"; # 11c3
# align 4
print OUT pack ('L*', 0);
# Let Perl know we're done. We no longer care about CRLF.
print OUT "\nEXE_STUFF\nif 0;\n\n";
$_ = <IN>;
unless ($_ =~ /^\#!.*perl/ ) {
print OUT "#!perl\n";
}
print OUT $_, <IN>;
close IN;
close OUT;
chmod 0755, $name;
__END__
=pod
# base: 401000
objdump -D --target=binary --architecture i386 $code
0: b8 cc 11 40 00 mov $0x4011cc,%eax
5: 83 3d cc 11 40 00 00 cmpl $0x0,0x4011cc
c: 74 16 je 0x24
e: 8b 10 mov (%eax),%edx
10: 85 d2 test %edx,%edx
12: 7d 06 jge 0x1a
14: 01 50 04 add %edx,0x4(%eax)
17: 83 c0 04 add $0x4,%eax
1a: ff 02 incl (%edx)
1c: 83 c0 04 add $0x4,%eax
1f: 83 38 00 cmpl $0x0,(%eax)
22: 75 ea jne 0xe
24: a1 48 11 40 00 mov 0x401148,%eax
29: ff d0 call *%eax ; GetCommandLineA
2b: 89 c3 mov %eax,%ebx
2d: 89 c7 mov %eax,%edi
2f: 31 c0 xor %eax,%eax
31: b9 f7 ff ff ff mov $0xfffffff7,%ecx
36: fc cld
37: f2 ae repnz scas %es:(%edi),%al
39: 89 f8 mov %edi,%eax
3b: 29 d8 sub %ebx,%eax
3d: 83 e1 fc and $0xfffffffc,%ecx
40: 01 cc add %ecx,%esp
42: be c3 11 40 00 mov $0x4011c3,%esi ; prepend 'perl -x '
47: 89 e7 mov %esp,%edi
49: b9 08 00 00 00 mov $0x8,%ecx
4e: f3 a4 rep movsb %ds:(%esi),%es:(%edi)
50: 89 de mov %ebx,%esi
52: 89 c1 mov %eax,%ecx
54: f3 a4 rep movsb %ds:(%esi),%es:(%edi)
56: 89 e3 mov %esp,%ebx
58: 83 ec 7c sub $0x7c,%esp
5b: b9 1b 00 00 00 mov $0x1b,%ecx
60: 89 e7 mov %esp,%edi
62: 31 c0 xor %eax,%eax
64: f3 ab rep stos %eax,%es:(%edi)
66: 89 5c 24 04 mov %ebx,0x4(%esp)
6a: c7 44 24 28 44 00 00 movl $0x44,0x28(%esp)
71: 00
72: 89 e0 mov %esp,%eax
74: 83 c0 28 add $0x28,%eax
77: 89 44 24 20 mov %eax,0x20(%esp)
7b: 83 c0 44 add $0x44,%eax
7e: 89 44 24 24 mov %eax,0x24(%esp)
82: a1 40 11 40 00 mov 0x401140,%eax
87: ff d0 call *%eax ; if (!CreateProcessA)
89: 21 c0 and %eax,%eax
8b: 75 04 jne 0x91
8d: 6a 64 push $0x64
8f: eb 25 jmp 0xb6 ; abnormal exit
91: 8b 44 24 44 mov 0x44(%esp),%eax ; else
95: 6a ff push $0xffffffff
97: 50 push %eax
98: a1 4c 11 40 00 mov 0x40114c,%eax
9d: ff d0 call *%eax ; if (!WaitForSingleObject)
9f: 21 c0 and %eax,%eax
a1: 74 04 je 0xa7
a3: 6a 65 push $0x65
a5: eb 0f jmp 0xb6 ; abnormal exit
a7: 8b 44 24 44 mov 0x44(%esp),%eax ; else
ab: 6a 66 push $0x66 ; exit with child code
ad: 54 push %esp
ae: 50 push %eax
af: a1 50 11 40 00 mov 0x401150,%eax
b4: ff d0 call *%eax ; GetExitCodeProcess
b6: a1 44 11 40 00 mov 0x401144,%eax
bb: ff d0 call *%eax ; ExitProcess
=cut