From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/object-0.26.2/src/read/pe/section.rs | 343 ++++++++++++++++++++++++++++ 1 file changed, 343 insertions(+) create mode 100644 vendor/object-0.26.2/src/read/pe/section.rs (limited to 'vendor/object-0.26.2/src/read/pe/section.rs') diff --git a/vendor/object-0.26.2/src/read/pe/section.rs b/vendor/object-0.26.2/src/read/pe/section.rs new file mode 100644 index 000000000..32e0a825d --- /dev/null +++ b/vendor/object-0.26.2/src/read/pe/section.rs @@ -0,0 +1,343 @@ +use core::marker::PhantomData; +use core::{cmp, iter, result, slice, str}; + +use crate::endian::LittleEndian as LE; +use crate::pe; +use crate::read::{ + self, CompressedData, CompressedFileRange, ObjectSection, ObjectSegment, ReadError, ReadRef, + Relocation, Result, SectionFlags, SectionIndex, SectionKind, +}; + +use super::{ImageNtHeaders, PeFile, SectionTable}; + +/// An iterator over the loadable sections of a `PeFile32`. +pub type PeSegmentIterator32<'data, 'file, R = &'data [u8]> = + PeSegmentIterator<'data, 'file, pe::ImageNtHeaders32, R>; +/// An iterator over the loadable sections of a `PeFile64`. +pub type PeSegmentIterator64<'data, 'file, R = &'data [u8]> = + PeSegmentIterator<'data, 'file, pe::ImageNtHeaders64, R>; + +/// An iterator over the loadable sections of a `PeFile`. +#[derive(Debug)] +pub struct PeSegmentIterator<'data, 'file, Pe, R = &'data [u8]> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + pub(super) file: &'file PeFile<'data, Pe, R>, + pub(super) iter: slice::Iter<'data, pe::ImageSectionHeader>, +} + +impl<'data, 'file, Pe, R> Iterator for PeSegmentIterator<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + type Item = PeSegment<'data, 'file, Pe, R>; + + fn next(&mut self) -> Option { + self.iter.next().map(|section| PeSegment { + file: self.file, + section, + }) + } +} + +/// A loadable section of a `PeFile32`. +pub type PeSegment32<'data, 'file, R = &'data [u8]> = + PeSegment<'data, 'file, pe::ImageNtHeaders32, R>; +/// A loadable section of a `PeFile64`. +pub type PeSegment64<'data, 'file, R = &'data [u8]> = + PeSegment<'data, 'file, pe::ImageNtHeaders64, R>; + +/// A loadable section of a `PeFile`. +#[derive(Debug)] +pub struct PeSegment<'data, 'file, Pe, R = &'data [u8]> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + file: &'file PeFile<'data, Pe, R>, + section: &'data pe::ImageSectionHeader, +} + +impl<'data, 'file, Pe, R> PeSegment<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + fn bytes(&self) -> Result<&'data [u8]> { + self.section + .pe_data(self.file.data) + .read_error("Invalid PE section offset or size") + } +} + +impl<'data, 'file, Pe, R> read::private::Sealed for PeSegment<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ +} + +impl<'data, 'file, Pe, R> ObjectSegment<'data> for PeSegment<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + #[inline] + fn address(&self) -> u64 { + u64::from(self.section.virtual_address.get(LE)).wrapping_add(self.file.common.image_base) + } + + #[inline] + fn size(&self) -> u64 { + u64::from(self.section.virtual_size.get(LE)) + } + + #[inline] + fn align(&self) -> u64 { + self.file.section_alignment() + } + + #[inline] + fn file_range(&self) -> (u64, u64) { + let (offset, size) = self.section.pe_file_range(); + (u64::from(offset), u64::from(size)) + } + + fn data(&self) -> Result<&'data [u8]> { + self.bytes() + } + + fn data_range(&self, address: u64, size: u64) -> Result> { + Ok(read::util::data_range( + self.bytes()?, + self.address(), + address, + size, + )) + } + + #[inline] + fn name(&self) -> Result> { + let name = self.section.name(self.file.common.symbols.strings())?; + Ok(Some( + str::from_utf8(name) + .ok() + .read_error("Non UTF-8 PE section name")?, + )) + } +} + +/// An iterator over the sections of a `PeFile32`. +pub type PeSectionIterator32<'data, 'file, R = &'data [u8]> = + PeSectionIterator<'data, 'file, pe::ImageNtHeaders32, R>; +/// An iterator over the sections of a `PeFile64`. +pub type PeSectionIterator64<'data, 'file, R = &'data [u8]> = + PeSectionIterator<'data, 'file, pe::ImageNtHeaders64, R>; + +/// An iterator over the sections of a `PeFile`. +#[derive(Debug)] +pub struct PeSectionIterator<'data, 'file, Pe, R = &'data [u8]> +where + 'data: 'file, + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + pub(super) file: &'file PeFile<'data, Pe, R>, + pub(super) iter: iter::Enumerate>, +} + +impl<'data, 'file, Pe, R> Iterator for PeSectionIterator<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + type Item = PeSection<'data, 'file, Pe, R>; + + fn next(&mut self) -> Option { + self.iter.next().map(|(index, section)| PeSection { + file: self.file, + index: SectionIndex(index + 1), + section, + }) + } +} + +/// A section of a `PeFile32`. +pub type PeSection32<'data, 'file, R = &'data [u8]> = + PeSection<'data, 'file, pe::ImageNtHeaders32, R>; +/// A section of a `PeFile64`. +pub type PeSection64<'data, 'file, R = &'data [u8]> = + PeSection<'data, 'file, pe::ImageNtHeaders64, R>; + +/// A section of a `PeFile`. +#[derive(Debug)] +pub struct PeSection<'data, 'file, Pe, R = &'data [u8]> +where + 'data: 'file, + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + pub(super) file: &'file PeFile<'data, Pe, R>, + pub(super) index: SectionIndex, + pub(super) section: &'data pe::ImageSectionHeader, +} + +impl<'data, 'file, Pe, R> PeSection<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + fn bytes(&self) -> Result<&'data [u8]> { + self.section + .pe_data(self.file.data) + .read_error("Invalid PE section offset or size") + } +} + +impl<'data, 'file, Pe, R> read::private::Sealed for PeSection<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ +} + +impl<'data, 'file, Pe, R> ObjectSection<'data> for PeSection<'data, 'file, Pe, R> +where + Pe: ImageNtHeaders, + R: ReadRef<'data>, +{ + type RelocationIterator = PeRelocationIterator<'data, 'file, R>; + + #[inline] + fn index(&self) -> SectionIndex { + self.index + } + + #[inline] + fn address(&self) -> u64 { + u64::from(self.section.virtual_address.get(LE)).wrapping_add(self.file.common.image_base) + } + + #[inline] + fn size(&self) -> u64 { + u64::from(self.section.virtual_size.get(LE)) + } + + #[inline] + fn align(&self) -> u64 { + self.file.section_alignment() + } + + #[inline] + fn file_range(&self) -> Option<(u64, u64)> { + let (offset, size) = self.section.pe_file_range(); + if size == 0 { + None + } else { + Some((u64::from(offset), u64::from(size))) + } + } + + fn data(&self) -> Result<&'data [u8]> { + self.bytes() + } + + fn data_range(&self, address: u64, size: u64) -> Result> { + Ok(read::util::data_range( + self.bytes()?, + self.address(), + address, + size, + )) + } + + #[inline] + fn compressed_file_range(&self) -> Result { + Ok(CompressedFileRange::none(self.file_range())) + } + + #[inline] + fn compressed_data(&self) -> Result> { + self.data().map(CompressedData::none) + } + + #[inline] + fn name(&self) -> Result<&str> { + let name = self.section.name(self.file.common.symbols.strings())?; + str::from_utf8(name) + .ok() + .read_error("Non UTF-8 PE section name") + } + + #[inline] + fn segment_name(&self) -> Result> { + Ok(None) + } + + #[inline] + fn kind(&self) -> SectionKind { + self.section.kind() + } + + fn relocations(&self) -> PeRelocationIterator<'data, 'file, R> { + PeRelocationIterator(PhantomData) + } + + fn flags(&self) -> SectionFlags { + SectionFlags::Coff { + characteristics: self.section.characteristics.get(LE), + } + } +} + +impl<'data> SectionTable<'data> { + /// Return the data at the given virtual address in a PE file. + pub fn pe_data_at>(&self, data: R, va: u32) -> Option<&'data [u8]> { + self.iter() + .filter_map(|section| section.pe_data_at(data, va)) + .next() + } +} + +impl pe::ImageSectionHeader { + /// Return the offset and size of the section in a PE file. + /// + /// Returns `None` for sections that have no data in the file. + pub fn pe_file_range(&self) -> (u32, u32) { + // Pointer and size will be zero for uninitialized data; we don't need to validate this. + let offset = self.pointer_to_raw_data.get(LE); + let size = cmp::min(self.virtual_size.get(LE), self.size_of_raw_data.get(LE)); + (offset, size) + } + + /// Return the section data in a PE file. + pub fn pe_data<'data, R: ReadRef<'data>>(&self, data: R) -> result::Result<&'data [u8], ()> { + let (offset, size) = self.pe_file_range(); + data.read_bytes_at(offset.into(), size.into()) + } + + /// Return the data at the given virtual address if this section contains it. + pub fn pe_data_at<'data, R: ReadRef<'data>>(&self, data: R, va: u32) -> Option<&'data [u8]> { + let section_va = self.virtual_address.get(LE); + let offset = va.checked_sub(section_va)?; + let section_data = self.pe_data(data).ok()?; + section_data.get(offset as usize..) + } +} + +/// An iterator over the relocations in an `PeSection`. +#[derive(Debug)] +pub struct PeRelocationIterator<'data, 'file, R = &'data [u8]>( + PhantomData<(&'data (), &'file (), R)>, +); + +impl<'data, 'file, R> Iterator for PeRelocationIterator<'data, 'file, R> { + type Item = (u64, Relocation); + + fn next(&mut self) -> Option { + None + } +} -- cgit v1.2.3