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Diffstat (limited to 'vendor/object/src/write/pe.rs')
| -rw-r--r-- | vendor/object/src/write/pe.rs | 847 |
1 files changed, 0 insertions, 847 deletions
diff --git a/vendor/object/src/write/pe.rs b/vendor/object/src/write/pe.rs deleted file mode 100644 index 70da3a0..0000000 --- a/vendor/object/src/write/pe.rs +++ /dev/null @@ -1,847 +0,0 @@ -//! Helper for writing PE files. -use alloc::string::String; -use alloc::vec::Vec; -use core::mem; - -use crate::endian::{LittleEndian as LE, *}; -use crate::pe; -use crate::write::util; -use crate::write::{Error, Result, WritableBuffer}; - -/// A helper for writing PE files. -/// -/// Writing uses a two phase approach. The first phase reserves file ranges and virtual -/// address ranges for everything in the order that they will be written. -/// -/// The second phase writes everything out in order. Thus the caller must ensure writing -/// is in the same order that file ranges were reserved. -#[allow(missing_debug_implementations)] -pub struct Writer<'a> { - is_64: bool, - section_alignment: u32, - file_alignment: u32, - - buffer: &'a mut dyn WritableBuffer, - len: u32, - virtual_len: u32, - headers_len: u32, - - code_address: u32, - data_address: u32, - code_len: u32, - data_len: u32, - bss_len: u32, - - nt_headers_offset: u32, - data_directories: Vec<DataDirectory>, - section_header_num: u16, - sections: Vec<Section>, - - symbol_offset: u32, - symbol_num: u32, - - reloc_blocks: Vec<RelocBlock>, - relocs: Vec<U16<LE>>, - reloc_offset: u32, -} - -impl<'a> Writer<'a> { - /// Create a new `Writer`. - pub fn new( - is_64: bool, - section_alignment: u32, - file_alignment: u32, - buffer: &'a mut dyn WritableBuffer, - ) -> Self { - Writer { - is_64, - section_alignment, - file_alignment, - - buffer, - len: 0, - virtual_len: 0, - headers_len: 0, - - code_address: 0, - data_address: 0, - code_len: 0, - data_len: 0, - bss_len: 0, - - nt_headers_offset: 0, - data_directories: Vec::new(), - section_header_num: 0, - sections: Vec::new(), - - symbol_offset: 0, - symbol_num: 0, - - reloc_blocks: Vec::new(), - relocs: Vec::new(), - reloc_offset: 0, - } - } - - /// Return the current virtual address size that has been reserved. - /// - /// This is only valid after section headers have been reserved. - pub fn virtual_len(&self) -> u32 { - self.virtual_len - } - - /// Reserve a virtual address range with the given size. - /// - /// The reserved length will be increased to match the section alignment. - /// - /// Returns the aligned offset of the start of the range. - pub fn reserve_virtual(&mut self, len: u32) -> u32 { - let offset = self.virtual_len; - self.virtual_len += len; - self.virtual_len = util::align_u32(self.virtual_len, self.section_alignment); - offset - } - - /// Reserve up to the given virtual address. - /// - /// The reserved length will be increased to match the section alignment. - pub fn reserve_virtual_until(&mut self, address: u32) { - debug_assert!(self.virtual_len <= address); - self.virtual_len = util::align_u32(address, self.section_alignment); - } - - /// Return the current file length that has been reserved. - pub fn reserved_len(&self) -> u32 { - self.len - } - - /// Return the current file length that has been written. - #[allow(clippy::len_without_is_empty)] - pub fn len(&self) -> usize { - self.buffer.len() - } - - /// Reserve a file range with the given size and starting alignment. - /// - /// Returns the aligned offset of the start of the range. - pub fn reserve(&mut self, len: u32, align_start: u32) -> u32 { - if len == 0 { - return self.len; - } - self.reserve_align(align_start); - let offset = self.len; - self.len += len; - offset - } - - /// Reserve a file range with the given size and using the file alignment. - /// - /// Returns the aligned offset of the start of the range. - pub fn reserve_file(&mut self, len: u32) -> u32 { - self.reserve(len, self.file_alignment) - } - - /// Write data. - pub fn write(&mut self, data: &[u8]) { - self.buffer.write_bytes(data); - } - - /// Reserve alignment padding bytes. - pub fn reserve_align(&mut self, align_start: u32) { - self.len = util::align_u32(self.len, align_start); - } - - /// Write alignment padding bytes. - pub fn write_align(&mut self, align_start: u32) { - util::write_align(self.buffer, align_start as usize); - } - - /// Write padding up to the next multiple of file alignment. - pub fn write_file_align(&mut self) { - self.write_align(self.file_alignment); - } - - /// Reserve the file range up to the given file offset. - pub fn reserve_until(&mut self, offset: u32) { - debug_assert!(self.len <= offset); - self.len = offset; - } - - /// Write padding up to the given file offset. - pub fn pad_until(&mut self, offset: u32) { - debug_assert!(self.buffer.len() <= offset as usize); - self.buffer.resize(offset as usize); - } - - /// Reserve the range for the DOS header. - /// - /// This must be at the start of the file. - /// - /// When writing, you may use `write_custom_dos_header` or `write_empty_dos_header`. - pub fn reserve_dos_header(&mut self) { - debug_assert_eq!(self.len, 0); - self.reserve(mem::size_of::<pe::ImageDosHeader>() as u32, 1); - } - - /// Write a custom DOS header. - /// - /// This must be at the start of the file. - pub fn write_custom_dos_header(&mut self, dos_header: &pe::ImageDosHeader) -> Result<()> { - debug_assert_eq!(self.buffer.len(), 0); - - // Start writing. - self.buffer - .reserve(self.len as usize) - .map_err(|_| Error(String::from("Cannot allocate buffer")))?; - - self.buffer.write(dos_header); - Ok(()) - } - - /// Write the DOS header for a file without a stub. - /// - /// This must be at the start of the file. - /// - /// Uses default values for all fields. - pub fn write_empty_dos_header(&mut self) -> Result<()> { - self.write_custom_dos_header(&pe::ImageDosHeader { - e_magic: U16::new(LE, pe::IMAGE_DOS_SIGNATURE), - e_cblp: U16::new(LE, 0), - e_cp: U16::new(LE, 0), - e_crlc: U16::new(LE, 0), - e_cparhdr: U16::new(LE, 0), - e_minalloc: U16::new(LE, 0), - e_maxalloc: U16::new(LE, 0), - e_ss: U16::new(LE, 0), - e_sp: U16::new(LE, 0), - e_csum: U16::new(LE, 0), - e_ip: U16::new(LE, 0), - e_cs: U16::new(LE, 0), - e_lfarlc: U16::new(LE, 0), - e_ovno: U16::new(LE, 0), - e_res: [U16::new(LE, 0); 4], - e_oemid: U16::new(LE, 0), - e_oeminfo: U16::new(LE, 0), - e_res2: [U16::new(LE, 0); 10], - e_lfanew: U32::new(LE, self.nt_headers_offset), - }) - } - - /// Reserve a fixed DOS header and stub. - /// - /// Use `reserve_dos_header` and `reserve` if you need a custom stub. - pub fn reserve_dos_header_and_stub(&mut self) { - self.reserve_dos_header(); - self.reserve(64, 1); - } - - /// Write a fixed DOS header and stub. - /// - /// Use `write_custom_dos_header` and `write` if you need a custom stub. - pub fn write_dos_header_and_stub(&mut self) -> Result<()> { - self.write_custom_dos_header(&pe::ImageDosHeader { - e_magic: U16::new(LE, pe::IMAGE_DOS_SIGNATURE), - e_cblp: U16::new(LE, 0x90), - e_cp: U16::new(LE, 3), - e_crlc: U16::new(LE, 0), - e_cparhdr: U16::new(LE, 4), - e_minalloc: U16::new(LE, 0), - e_maxalloc: U16::new(LE, 0xffff), - e_ss: U16::new(LE, 0), - e_sp: U16::new(LE, 0xb8), - e_csum: U16::new(LE, 0), - e_ip: U16::new(LE, 0), - e_cs: U16::new(LE, 0), - e_lfarlc: U16::new(LE, 0x40), - e_ovno: U16::new(LE, 0), - e_res: [U16::new(LE, 0); 4], - e_oemid: U16::new(LE, 0), - e_oeminfo: U16::new(LE, 0), - e_res2: [U16::new(LE, 0); 10], - e_lfanew: U32::new(LE, self.nt_headers_offset), - })?; - - #[rustfmt::skip] - self.buffer.write_bytes(&[ - 0x0e, 0x1f, 0xba, 0x0e, 0x00, 0xb4, 0x09, 0xcd, - 0x21, 0xb8, 0x01, 0x4c, 0xcd, 0x21, 0x54, 0x68, - 0x69, 0x73, 0x20, 0x70, 0x72, 0x6f, 0x67, 0x72, - 0x61, 0x6d, 0x20, 0x63, 0x61, 0x6e, 0x6e, 0x6f, - 0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6e, - 0x20, 0x69, 0x6e, 0x20, 0x44, 0x4f, 0x53, 0x20, - 0x6d, 0x6f, 0x64, 0x65, 0x2e, 0x0d, 0x0d, 0x0a, - 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - ]); - - Ok(()) - } - - fn nt_headers_size(&self) -> u32 { - if self.is_64 { - mem::size_of::<pe::ImageNtHeaders64>() as u32 - } else { - mem::size_of::<pe::ImageNtHeaders32>() as u32 - } - } - - fn optional_header_size(&self) -> u32 { - let size = if self.is_64 { - mem::size_of::<pe::ImageOptionalHeader64>() as u32 - } else { - mem::size_of::<pe::ImageOptionalHeader32>() as u32 - }; - size + self.data_directories.len() as u32 * mem::size_of::<pe::ImageDataDirectory>() as u32 - } - - /// Return the offset of the NT headers, if reserved. - pub fn nt_headers_offset(&self) -> u32 { - self.nt_headers_offset - } - - /// Reserve the range for the NT headers. - pub fn reserve_nt_headers(&mut self, data_directory_num: usize) { - debug_assert_eq!(self.nt_headers_offset, 0); - self.nt_headers_offset = self.reserve(self.nt_headers_size(), 8); - self.data_directories = vec![DataDirectory::default(); data_directory_num]; - self.reserve( - data_directory_num as u32 * mem::size_of::<pe::ImageDataDirectory>() as u32, - 1, - ); - } - - /// Set the virtual address and size of a data directory. - pub fn set_data_directory(&mut self, index: usize, virtual_address: u32, size: u32) { - self.data_directories[index] = DataDirectory { - virtual_address, - size, - } - } - - /// Write the NT headers. - pub fn write_nt_headers(&mut self, nt_headers: NtHeaders) { - self.pad_until(self.nt_headers_offset); - self.buffer.write(&U32::new(LE, pe::IMAGE_NT_SIGNATURE)); - let file_header = pe::ImageFileHeader { - machine: U16::new(LE, nt_headers.machine), - number_of_sections: U16::new(LE, self.section_header_num), - time_date_stamp: U32::new(LE, nt_headers.time_date_stamp), - pointer_to_symbol_table: U32::new(LE, self.symbol_offset), - number_of_symbols: U32::new(LE, self.symbol_num), - size_of_optional_header: U16::new(LE, self.optional_header_size() as u16), - characteristics: U16::new(LE, nt_headers.characteristics), - }; - self.buffer.write(&file_header); - if self.is_64 { - let optional_header = pe::ImageOptionalHeader64 { - magic: U16::new(LE, pe::IMAGE_NT_OPTIONAL_HDR64_MAGIC), - major_linker_version: nt_headers.major_linker_version, - minor_linker_version: nt_headers.minor_linker_version, - size_of_code: U32::new(LE, self.code_len), - size_of_initialized_data: U32::new(LE, self.data_len), - size_of_uninitialized_data: U32::new(LE, self.bss_len), - address_of_entry_point: U32::new(LE, nt_headers.address_of_entry_point), - base_of_code: U32::new(LE, self.code_address), - image_base: U64::new(LE, nt_headers.image_base), - section_alignment: U32::new(LE, self.section_alignment), - file_alignment: U32::new(LE, self.file_alignment), - major_operating_system_version: U16::new( - LE, - nt_headers.major_operating_system_version, - ), - minor_operating_system_version: U16::new( - LE, - nt_headers.minor_operating_system_version, - ), - major_image_version: U16::new(LE, nt_headers.major_image_version), - minor_image_version: U16::new(LE, nt_headers.minor_image_version), - major_subsystem_version: U16::new(LE, nt_headers.major_subsystem_version), - minor_subsystem_version: U16::new(LE, nt_headers.minor_subsystem_version), - win32_version_value: U32::new(LE, 0), - size_of_image: U32::new(LE, self.virtual_len), - size_of_headers: U32::new(LE, self.headers_len), - check_sum: U32::new(LE, 0), - subsystem: U16::new(LE, nt_headers.subsystem), - dll_characteristics: U16::new(LE, nt_headers.dll_characteristics), - size_of_stack_reserve: U64::new(LE, nt_headers.size_of_stack_reserve), - size_of_stack_commit: U64::new(LE, nt_headers.size_of_stack_commit), - size_of_heap_reserve: U64::new(LE, nt_headers.size_of_heap_reserve), - size_of_heap_commit: U64::new(LE, nt_headers.size_of_heap_commit), - loader_flags: U32::new(LE, 0), - number_of_rva_and_sizes: U32::new(LE, self.data_directories.len() as u32), - }; - self.buffer.write(&optional_header); - } else { - let optional_header = pe::ImageOptionalHeader32 { - magic: U16::new(LE, pe::IMAGE_NT_OPTIONAL_HDR32_MAGIC), - major_linker_version: nt_headers.major_linker_version, - minor_linker_version: nt_headers.minor_linker_version, - size_of_code: U32::new(LE, self.code_len), - size_of_initialized_data: U32::new(LE, self.data_len), - size_of_uninitialized_data: U32::new(LE, self.bss_len), - address_of_entry_point: U32::new(LE, nt_headers.address_of_entry_point), - base_of_code: U32::new(LE, self.code_address), - base_of_data: U32::new(LE, self.data_address), - image_base: U32::new(LE, nt_headers.image_base as u32), - section_alignment: U32::new(LE, self.section_alignment), - file_alignment: U32::new(LE, self.file_alignment), - major_operating_system_version: U16::new( - LE, - nt_headers.major_operating_system_version, - ), - minor_operating_system_version: U16::new( - LE, - nt_headers.minor_operating_system_version, - ), - major_image_version: U16::new(LE, nt_headers.major_image_version), - minor_image_version: U16::new(LE, nt_headers.minor_image_version), - major_subsystem_version: U16::new(LE, nt_headers.major_subsystem_version), - minor_subsystem_version: U16::new(LE, nt_headers.minor_subsystem_version), - win32_version_value: U32::new(LE, 0), - size_of_image: U32::new(LE, self.virtual_len), - size_of_headers: U32::new(LE, self.headers_len), - check_sum: U32::new(LE, 0), - subsystem: U16::new(LE, nt_headers.subsystem), - dll_characteristics: U16::new(LE, nt_headers.dll_characteristics), - size_of_stack_reserve: U32::new(LE, nt_headers.size_of_stack_reserve as u32), - size_of_stack_commit: U32::new(LE, nt_headers.size_of_stack_commit as u32), - size_of_heap_reserve: U32::new(LE, nt_headers.size_of_heap_reserve as u32), - size_of_heap_commit: U32::new(LE, nt_headers.size_of_heap_commit as u32), - loader_flags: U32::new(LE, 0), - number_of_rva_and_sizes: U32::new(LE, self.data_directories.len() as u32), - }; - self.buffer.write(&optional_header); - } - - for dir in &self.data_directories { - self.buffer.write(&pe::ImageDataDirectory { - virtual_address: U32::new(LE, dir.virtual_address), - size: U32::new(LE, dir.size), - }) - } - } - - /// Reserve the section headers. - /// - /// The number of reserved section headers must be the same as the number of sections that - /// are later reserved. - // TODO: change this to a maximum number of sections? - pub fn reserve_section_headers(&mut self, section_header_num: u16) { - debug_assert_eq!(self.section_header_num, 0); - self.section_header_num = section_header_num; - self.reserve( - u32::from(section_header_num) * mem::size_of::<pe::ImageSectionHeader>() as u32, - 1, - ); - // Padding before sections must be included in headers_len. - self.reserve_align(self.file_alignment); - self.headers_len = self.len; - self.reserve_virtual(self.len); - } - - /// Write the section headers. - /// - /// This uses information that was recorded when the sections were reserved. - pub fn write_section_headers(&mut self) { - debug_assert_eq!(self.section_header_num as usize, self.sections.len()); - for section in &self.sections { - let section_header = pe::ImageSectionHeader { - name: section.name, - virtual_size: U32::new(LE, section.range.virtual_size), - virtual_address: U32::new(LE, section.range.virtual_address), - size_of_raw_data: U32::new(LE, section.range.file_size), - pointer_to_raw_data: U32::new(LE, section.range.file_offset), - pointer_to_relocations: U32::new(LE, 0), - pointer_to_linenumbers: U32::new(LE, 0), - number_of_relocations: U16::new(LE, 0), - number_of_linenumbers: U16::new(LE, 0), - characteristics: U32::new(LE, section.characteristics), - }; - self.buffer.write(§ion_header); - } - } - - /// Reserve a section. - /// - /// Returns the file range and virtual address range that are reserved - /// for the section. - pub fn reserve_section( - &mut self, - name: [u8; 8], - characteristics: u32, - virtual_size: u32, - data_size: u32, - ) -> SectionRange { - let virtual_address = self.reserve_virtual(virtual_size); - - // Padding after section must be included in section file size. - let file_size = util::align_u32(data_size, self.file_alignment); - let file_offset = if file_size != 0 { - self.reserve(file_size, self.file_alignment) - } else { - 0 - }; - - // Sizes in optional header use the virtual size with the file alignment. - let aligned_virtual_size = util::align_u32(virtual_size, self.file_alignment); - if characteristics & pe::IMAGE_SCN_CNT_CODE != 0 { - if self.code_address == 0 { - self.code_address = virtual_address; - } - self.code_len += aligned_virtual_size; - } else if characteristics & pe::IMAGE_SCN_CNT_INITIALIZED_DATA != 0 { - if self.data_address == 0 { - self.data_address = virtual_address; - } - self.data_len += aligned_virtual_size; - } else if characteristics & pe::IMAGE_SCN_CNT_UNINITIALIZED_DATA != 0 { - if self.data_address == 0 { - self.data_address = virtual_address; - } - self.bss_len += aligned_virtual_size; - } - - let range = SectionRange { - virtual_address, - virtual_size, - file_offset, - file_size, - }; - self.sections.push(Section { - name, - characteristics, - range, - }); - range - } - - /// Write the data for a section. - pub fn write_section(&mut self, offset: u32, data: &[u8]) { - if data.is_empty() { - return; - } - self.pad_until(offset); - self.write(data); - self.write_align(self.file_alignment); - } - - /// Reserve a `.text` section. - /// - /// Contains executable code. - pub fn reserve_text_section(&mut self, size: u32) -> SectionRange { - self.reserve_section( - *b".text\0\0\0", - pe::IMAGE_SCN_CNT_CODE | pe::IMAGE_SCN_MEM_EXECUTE | pe::IMAGE_SCN_MEM_READ, - size, - size, - ) - } - - /// Reserve a `.data` section. - /// - /// Contains initialized data. - /// - /// May also contain uninitialized data if `virtual_size` is greater than `data_size`. - pub fn reserve_data_section(&mut self, virtual_size: u32, data_size: u32) -> SectionRange { - self.reserve_section( - *b".data\0\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ | pe::IMAGE_SCN_MEM_WRITE, - virtual_size, - data_size, - ) - } - - /// Reserve a `.rdata` section. - /// - /// Contains read-only initialized data. - pub fn reserve_rdata_section(&mut self, size: u32) -> SectionRange { - self.reserve_section( - *b".rdata\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ, - size, - size, - ) - } - - /// Reserve a `.bss` section. - /// - /// Contains uninitialized data. - pub fn reserve_bss_section(&mut self, size: u32) -> SectionRange { - self.reserve_section( - *b".bss\0\0\0\0", - pe::IMAGE_SCN_CNT_UNINITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ | pe::IMAGE_SCN_MEM_WRITE, - size, - 0, - ) - } - - /// Reserve an `.idata` section. - /// - /// Contains import tables. Note that it is permissible to store import tables in a different - /// section. - /// - /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_IMPORT` data directory. - pub fn reserve_idata_section(&mut self, size: u32) -> SectionRange { - let range = self.reserve_section( - *b".idata\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ | pe::IMAGE_SCN_MEM_WRITE, - size, - size, - ); - let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_IMPORT]; - debug_assert_eq!(dir.virtual_address, 0); - *dir = DataDirectory { - virtual_address: range.virtual_address, - size, - }; - range - } - - /// Reserve an `.edata` section. - /// - /// Contains export tables. - /// - /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_EXPORT` data directory. - pub fn reserve_edata_section(&mut self, size: u32) -> SectionRange { - let range = self.reserve_section( - *b".edata\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ, - size, - size, - ); - let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_EXPORT]; - debug_assert_eq!(dir.virtual_address, 0); - *dir = DataDirectory { - virtual_address: range.virtual_address, - size, - }; - range - } - - /// Reserve a `.pdata` section. - /// - /// Contains exception information. - /// - /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_EXCEPTION` data directory. - pub fn reserve_pdata_section(&mut self, size: u32) -> SectionRange { - let range = self.reserve_section( - *b".pdata\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ, - size, - size, - ); - let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_EXCEPTION]; - debug_assert_eq!(dir.virtual_address, 0); - *dir = DataDirectory { - virtual_address: range.virtual_address, - size, - }; - range - } - - /// Reserve a `.xdata` section. - /// - /// Contains exception information. - pub fn reserve_xdata_section(&mut self, size: u32) -> SectionRange { - self.reserve_section( - *b".xdata\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ, - size, - size, - ) - } - - /// Reserve a `.rsrc` section. - /// - /// Contains the resource directory. - /// - /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_RESOURCE` data directory. - pub fn reserve_rsrc_section(&mut self, size: u32) -> SectionRange { - let range = self.reserve_section( - *b".rsrc\0\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ, - size, - size, - ); - let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_RESOURCE]; - debug_assert_eq!(dir.virtual_address, 0); - *dir = DataDirectory { - virtual_address: range.virtual_address, - size, - }; - range - } - - /// Add a base relocation. - /// - /// `typ` must be one of the `IMAGE_REL_BASED_*` constants. - pub fn add_reloc(&mut self, mut virtual_address: u32, typ: u16) { - let reloc = U16::new(LE, typ << 12 | (virtual_address & 0xfff) as u16); - virtual_address &= !0xfff; - if let Some(block) = self.reloc_blocks.last_mut() { - if block.virtual_address == virtual_address { - self.relocs.push(reloc); - block.count += 1; - return; - } - // Blocks must have an even number of relocations. - if block.count & 1 != 0 { - self.relocs.push(U16::new(LE, 0)); - block.count += 1; - } - debug_assert!(block.virtual_address < virtual_address); - } - self.relocs.push(reloc); - self.reloc_blocks.push(RelocBlock { - virtual_address, - count: 1, - }); - } - - /// Return true if a base relocation has been added. - pub fn has_relocs(&mut self) -> bool { - !self.relocs.is_empty() - } - - /// Reserve a `.reloc` section. - /// - /// This contains the base relocations that were added with `add_reloc`. - /// - /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_BASERELOC` data directory. - pub fn reserve_reloc_section(&mut self) -> SectionRange { - if let Some(block) = self.reloc_blocks.last_mut() { - // Blocks must have an even number of relocations. - if block.count & 1 != 0 { - self.relocs.push(U16::new(LE, 0)); - block.count += 1; - } - } - let size = self.reloc_blocks.iter().map(RelocBlock::size).sum(); - let range = self.reserve_section( - *b".reloc\0\0", - pe::IMAGE_SCN_CNT_INITIALIZED_DATA - | pe::IMAGE_SCN_MEM_READ - | pe::IMAGE_SCN_MEM_DISCARDABLE, - size, - size, - ); - let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_BASERELOC]; - debug_assert_eq!(dir.virtual_address, 0); - *dir = DataDirectory { - virtual_address: range.virtual_address, - size, - }; - self.reloc_offset = range.file_offset; - range - } - - /// Write a `.reloc` section. - /// - /// This contains the base relocations that were added with `add_reloc`. - pub fn write_reloc_section(&mut self) { - if self.reloc_offset == 0 { - return; - } - self.pad_until(self.reloc_offset); - - let mut total = 0; - for block in &self.reloc_blocks { - self.buffer.write(&pe::ImageBaseRelocation { - virtual_address: U32::new(LE, block.virtual_address), - size_of_block: U32::new(LE, block.size()), - }); - self.buffer - .write_slice(&self.relocs[total..][..block.count as usize]); - total += block.count as usize; - } - debug_assert_eq!(total, self.relocs.len()); - - self.write_align(self.file_alignment); - } - - /// Reserve the certificate table. - /// - /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_SECURITY` data directory. - // TODO: reserve individual certificates - pub fn reserve_certificate_table(&mut self, size: u32) { - let size = util::align_u32(size, 8); - let offset = self.reserve(size, 8); - let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_SECURITY]; - debug_assert_eq!(dir.virtual_address, 0); - *dir = DataDirectory { - virtual_address: offset, - size, - }; - } - - /// Write the certificate table. - // TODO: write individual certificates - pub fn write_certificate_table(&mut self, data: &[u8]) { - let dir = self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_SECURITY]; - self.pad_until(dir.virtual_address); - self.write(data); - self.pad_until(dir.virtual_address + dir.size); - } -} - -/// Information required for writing [`pe::ImageNtHeaders32`] or [`pe::ImageNtHeaders64`]. -#[allow(missing_docs)] -#[derive(Debug, Clone)] -pub struct NtHeaders { - // ImageFileHeader - pub machine: u16, - pub time_date_stamp: u32, - pub characteristics: u16, - // ImageOptionalHeader - pub major_linker_version: u8, - pub minor_linker_version: u8, - pub address_of_entry_point: u32, - pub image_base: u64, - pub major_operating_system_version: u16, - pub minor_operating_system_version: u16, - pub major_image_version: u16, - pub minor_image_version: u16, - pub major_subsystem_version: u16, - pub minor_subsystem_version: u16, - pub subsystem: u16, - pub dll_characteristics: u16, - pub size_of_stack_reserve: u64, - pub size_of_stack_commit: u64, - pub size_of_heap_reserve: u64, - pub size_of_heap_commit: u64, -} - -#[derive(Default, Clone, Copy)] -struct DataDirectory { - virtual_address: u32, - size: u32, -} - -/// Information required for writing [`pe::ImageSectionHeader`]. -#[allow(missing_docs)] -#[derive(Debug, Clone)] -pub struct Section { - pub name: [u8; pe::IMAGE_SIZEOF_SHORT_NAME], - pub characteristics: u32, - pub range: SectionRange, -} - -/// The file range and virtual address range for a section. -#[allow(missing_docs)] -#[derive(Debug, Default, Clone, Copy)] -pub struct SectionRange { - pub virtual_address: u32, - pub virtual_size: u32, - pub file_offset: u32, - pub file_size: u32, -} - -struct RelocBlock { - virtual_address: u32, - count: u32, -} - -impl RelocBlock { - fn size(&self) -> u32 { - mem::size_of::<pe::ImageBaseRelocation>() as u32 + self.count * mem::size_of::<u16>() as u32 - } -} |