From 650791dcba22811466b2e4fec92ebace0bb0eb78 Mon Sep 17 00:00:00 2001
From: Jason Hiser <jdhiser@gmail.com>
Date: Mon, 29 Jul 2019 09:16:46 -0400
Subject: [PATCH] added pe32 support for 32-bit windows binaries
---
include/pewrite.h | 16 ++++----
src/pewrite.cpp | 96 ++++++++++++++++++++++++++---------------------
src/zipr.cpp | 1 +
3 files changed, 64 insertions(+), 49 deletions(-)
diff --git a/include/pewrite.h b/include/pewrite.h
index 1cc6b69ad..d93043248 100644
--- a/include/pewrite.h
+++ b/include/pewrite.h
@@ -6,7 +6,7 @@
#include <map>
-template <int bitwidth>
+template <int bitwidth, class uintMa_t /* a uint<size>_t for the machine */ >
class PeWriter : ExeWriter
{
@@ -53,7 +53,7 @@ class PeWriter : ExeWriter
using win_specific_fields_t =
struct win_specific_fields
{
- uint64_t image_base;
+ uintMa_t image_base;
uint32_t section_alignment;
uint32_t file_alignment;
uint16_t major_os_version;
@@ -68,10 +68,10 @@ class PeWriter : ExeWriter
uint32_t checksum;
uint16_t subsystem;
uint16_t dll_characteristics;
- uint64_t sizeof_stack_reserve;
- uint64_t sizeof_stack_commit;
- uint64_t sizeof_heap_reserve;
- uint64_t sizeof_heap_commit;
+ uintMa_t sizeof_stack_reserve;
+ uintMa_t sizeof_stack_commit;
+ uintMa_t sizeof_heap_reserve;
+ uintMa_t sizeof_heap_commit;
uint32_t loader_flags;
uint32_t num_rva_and_sizes;
};
@@ -165,6 +165,7 @@ class PeWriter : ExeWriter
coff_header_t coff_header_hdr={};
standard_coff_header_t standard_coff_header_hdr={};
+ uint32_t base_of_data=0; // an extra field for pe32 field that's not part of the pe32+ standard_coff_header_t
win_specific_fields_t win_specific_fields_hdr={};
std::vector<image_data_directory_t> image_data_dir_hdrs={};
std::vector<pe_section_header_t> section_headers={};
@@ -190,7 +191,8 @@ class PeWriter : ExeWriter
};
-using PeWriter64 = PeWriter<64>;
+using PeWriter32 = PeWriter<32, uint32_t>;
+using PeWriter64 = PeWriter<64, uint64_t>;
diff --git a/src/pewrite.cpp b/src/pewrite.cpp
index 55fd0358a..5a5b9b147 100644
--- a/src/pewrite.cpp
+++ b/src/pewrite.cpp
@@ -49,13 +49,13 @@ uint8_t dos_header[]=
-template<int width>
-void PeWriter<width>::Write(const string &out_file, const string &infile)
+template<int width, class uintMa_t>
+void PeWriter<width,uintMa_t>::Write(const string &out_file, const string &infile)
{
// confirm our understanding of these fields
assert(sizeof(coff_header_t)==24);
assert(sizeof(standard_coff_header_t)==24);
- assert(sizeof(win_specific_fields_t)==88);
+ // assert(sizeof(win_specific_fields_t)==88); not so true on pe32.
assert(sizeof(pe_section_header_t)==40);
// open input/output files
@@ -80,17 +80,15 @@ void PeWriter<width>::Write(const string &out_file, const string &infile)
}
-template<int width>
-void PeWriter<width>::InitHeaders()
+template<int width, class uintMa_t>
+void PeWriter<width,uintMa_t>::InitHeaders()
{
const auto pebliss=reinterpret_cast<pe_bliss::pe_base*>(m_exeiop->get_pebliss());
assert(pebliss);
const auto orig_file_full_headers_str = pebliss -> get_full_headers_data();
const auto orig_file_full_headres_cstr = orig_file_full_headers_str.c_str();
- // unused -- const auto orig_file_coff_header = (coff_header_t*)(orig_file_full_headres_cstr+sizeof(dos_header));
const auto orig_file_standard_coff_header = (standard_coff_header_t*)(orig_file_full_headres_cstr+sizeof(dos_header)+sizeof(coff_header_t));
- // unused --const auto orig_file_win_header = (win_specific_fields_t*)(orig_file_full_headres_cstr+sizeof(dos_header)+sizeof(coff_header_t)+sizeof(standard_coff_header_t));
// calculate the total size (last-first), rounded to page boundaries so that the OS can allocate that much virtual memory
// for this object.
@@ -98,12 +96,15 @@ void PeWriter<width>::InitHeaders()
const auto image_size = page_round_up(DetectMaxAddr()) - page_round_down(image_base);
+ const auto machine = (width == 64) ? 0x8664 : // x86 64
+ (width == 32) ? 0x014c : // i386
+ throw invalid_argument("Cannot map width to machine type");
// initialize the headers
coff_header_hdr = coff_header_t
({
0x00004550, // "PE\0\0"
- 0x8664, // x86 64
+ machine, // x86 64
(uint16_t)segvec.size(), // size of the segment map
(uint32_t)time(nullptr), // time in seconds
0, // ?? have to figure file pointer to symtable out.
@@ -112,43 +113,47 @@ void PeWriter<width>::InitHeaders()
pebliss->get_characteristics() // relocs stripped | executable | line numbers stripped | large addresses OK
} );
+ const auto magic_no = width==64 ? 0x20b : // PE32+
+ width==32 ? 0x10b : // PE32
+ throw invalid_argument("Width -> magic cannot be calculated");
standard_coff_header_hdr = standard_coff_header_t
( {
- 0x20b, // PE32+
+ magic_no,
orig_file_standard_coff_header->major_linker_version, // version 2.25 linker (major part)
orig_file_standard_coff_header->minor_linker_version, // version 2.25 linker (minor part)
0x1234, // ?? have to figure out sizeof code
0x5678, // ?? have to figure out initd data
0x4321, // ?? have to figure out uninitd data
- (uint32_t)m_exeiop->get_entry(), // entry point
+ (uint32_t)(m_exeiop->get_entry() - image_base), // entry point
0x1000 // ?? have to figure out code base
} );
+ base_of_data=0x2000;
win_specific_fields_hdr = win_specific_fields_t
( {
- image_base, // image_base;
- PAGE_SIZE, // section_alignment;
- 512, // file_alignment -- guessing this is a magic constant we can always use
- pebliss->get_major_os_version(), // major_os_version -- constants, may very if we need to port to more win versions. read from a.ncexe?
- pebliss->get_minor_os_version(), // minor_os_version;
- 0, // major_image_version;
- 0, // minor_image_version;
- pebliss->get_major_subsystem_version(), // major_subsystem_version;
- pebliss->get_minor_subsystem_version(), // minor_subsystem_version;
- 0, // win32_version;
- (uint32_t)image_size, // sizeof_image in memory (not including headers?)
- 0x1000, // sizeof_headers (OK to over estimate?)
- 0, // checksum ?? need to fix later
- 3, // subsystem ?? read from input file?
- pebliss->get_dll_characteristics (), // dll_characteristics
- pebliss->get_stack_size_reserve_64 (), // sizeof_stack_reserve
- pebliss->get_stack_size_commit_64 (), // sizeof_stack_commit
- pebliss->get_heap_size_reserve_64 (), // sizeof_heap_reserve
- pebliss->get_heap_size_commit_64 (), // sizeof_heap_commit
- 0, // loader_flags -- reserved, must be 0.
- 0x10 // number of rva_and_sizes -- always 16 from what I can tell?
+ uintMa_t(image_base), // image_base;
+ PAGE_SIZE, // section_alignment;
+ 512, // file_alignment -- guessing this is a magic constant we can always use
+ pebliss->get_major_os_version(), // major_os_version -- constants, may very if we need to port to more win versions. read from a.ncexe?
+ pebliss->get_minor_os_version(), // minor_os_version;
+ 1, // major_image_version;
+ 0, // minor_image_version;
+ pebliss->get_major_subsystem_version(), // major_subsystem_version;
+ pebliss->get_minor_subsystem_version(), // minor_subsystem_version;
+ 0, // win32_version;
+ (uint32_t)image_size, // sizeof_image in memory (not including headers?)
+ 0x1000, // sizeof_headers (OK to over estimate?)
+ 0, // checksum ?? need to fix later
+ 3, // subsystem ?? read from input file?
+ pebliss->get_dll_characteristics(), // dll_characteristics
+ uintMa_t(pebliss->get_stack_size_reserve_64()), // sizeof_stack_reserve
+ uintMa_t(pebliss->get_stack_size_commit_64 ()), // sizeof_stack_commit
+ uintMa_t(pebliss->get_heap_size_reserve_64 ()), // sizeof_heap_reserve
+ uintMa_t(pebliss->get_heap_size_commit_64 ()), // sizeof_heap_commit
+ 0, // loader_flags -- reserved, must be 0.
+ 0x10 // number of rva_and_sizes -- always 16 from what I can tell?
} );
//
@@ -180,19 +185,21 @@ void PeWriter<width>::InitHeaders()
}
-template<int width>
-void PeWriter<width>::GenerateDataDirectory()
+template<int width, class uintMa_t>
+void PeWriter<width,uintMa_t>::GenerateDataDirectory()
{
}
-template<int width>
-void PeWriter<width>::CalculateHeaderSizes()
+template<int width, class uintMa_t>
+void PeWriter<width,uintMa_t>::CalculateHeaderSizes()
{
// shorten name
auto &hdr_size=coff_header_hdr.sizeof_opt_header;
hdr_size = 0;
hdr_size += sizeof(standard_coff_header_t);
+ if(width==32)
+ hdr_size+=sizeof(uintMa_t); // add in BaseOfData field in sizing.
hdr_size += sizeof(win_specific_fields_t);
hdr_size += sizeof(image_data_directory_t) * image_data_dir_hdrs.size();
@@ -210,8 +217,8 @@ void PeWriter<width>::CalculateHeaderSizes()
}
-template<int width>
-void PeWriter<width>::CreateSectionHeaders()
+template<int width, class uintMa_t>
+void PeWriter<width,uintMa_t>::CreateSectionHeaders()
{
auto code_size=0u;
auto init_data_size=0u;
@@ -228,21 +235,23 @@ void PeWriter<width>::CreateSectionHeaders()
}
// update header with section size info.
- standard_coff_header_hdr.sizeof_code = code_size;
+ standard_coff_header_hdr.sizeof_code = code_size;
standard_coff_header_hdr.sizeof_initd_data = init_data_size;
standard_coff_header_hdr.sizeof_uninitd_data = uninit_data_size;
}
-template<int width>
-void PeWriter<width>::WriteFilePass1()
+template<int width, class uintMa_t>
+void PeWriter<width,uintMa_t>::WriteFilePass1()
{
const auto res1=fseek(fout, 0,SEEK_SET);
assert(res1==0);
fwrite(&dos_header , sizeof(dos_header) , 1, fout);
fwrite(&coff_header_hdr , sizeof(coff_header_hdr) , 1, fout);
fwrite(&standard_coff_header_hdr, sizeof(standard_coff_header_hdr), 1, fout);
+ if(width==32)
+ fwrite(&base_of_data , sizeof(base_of_data), 1, fout);
fwrite(&win_specific_fields_hdr , sizeof(win_specific_fields_hdr) , 1, fout);
fwrite(image_data_dir_hdrs.data(), sizeof(image_data_directory_t), image_data_dir_hdrs.size(), fout);
@@ -266,7 +275,7 @@ void PeWriter<width>::WriteFilePass1()
const auto seg_end_addr = s.virtual_addr + s.file_size;
for(auto i = page_round_down(s.virtual_addr); i < seg_end_addr; i+=PAGE_SIZE)
{
- const auto & page = pagemap[file_base+i];
+ const auto &page = pagemap[file_base+i];
for(auto j=0u; j<PAGE_SIZE; j++)
{
// skip bytes that aren't in the section.
@@ -289,4 +298,7 @@ void PeWriter<width>::WriteFilePass1()
}
-template class PeWriter<64>;
+template class PeWriter<64, uint64_t>;
+template class PeWriter<32, uint32_t>;
+// class PeWriter32; // instantiate templates.
+// class PeWriter64;
diff --git a/src/zipr.cpp b/src/zipr.cpp
index 76305f605..5c2d6895f 100644
--- a/src/zipr.cpp
+++ b/src/zipr.cpp
@@ -1906,6 +1906,7 @@ void ZiprImpl_t::OutputBinaryFile(const string &name)
auto ew=unique_ptr<ExeWriter>(
is_pe && bit_width == 64 ? (ExeWriter*)new PeWriter64(exeiop, m_firp, *m_add_sections, *m_bss_opts) :
+ is_pe && bit_width == 32 ? (ExeWriter*)new PeWriter32(exeiop, m_firp, *m_add_sections, *m_bss_opts) :
is_elf && bit_width == 64 ? (ExeWriter*)new ElfWriter64(exeiop, m_firp, *m_add_sections, *m_bss_opts) :
is_elf && bit_width == 32 ? (ExeWriter*)new ElfWriter32(exeiop, m_firp, *m_add_sections, *m_bss_opts) :
throw invalid_argument("Unknown file type/machine width combo")
--
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