| use core::fmt::Debug; |
| use core::{result, str}; |
| |
| use crate::endian::{self, Endianness}; |
| use crate::macho; |
| use crate::pod::{Bytes, Pod}; |
| use crate::read::{self, ObjectSegment, ReadError, Result}; |
| |
| use super::{MachHeader, MachOFile, MachOLoadCommand, MachOLoadCommandIterator, Section}; |
| |
| /// An iterator over the segments of a `MachOFile32`. |
| pub type MachOSegmentIterator32<'data, 'file, Endian = Endianness> = |
| MachOSegmentIterator<'data, 'file, macho::MachHeader32<Endian>>; |
| /// An iterator over the segments of a `MachOFile64`. |
| pub type MachOSegmentIterator64<'data, 'file, Endian = Endianness> = |
| MachOSegmentIterator<'data, 'file, macho::MachHeader64<Endian>>; |
| |
| /// An iterator over the segments of a `MachOFile`. |
| #[derive(Debug)] |
| pub struct MachOSegmentIterator<'data, 'file, Mach> |
| where |
| 'data: 'file, |
| Mach: MachHeader, |
| { |
| pub(super) file: &'file MachOFile<'data, Mach>, |
| pub(super) commands: MachOLoadCommandIterator<'data, Mach::Endian>, |
| } |
| |
| impl<'data, 'file, Mach: MachHeader> Iterator for MachOSegmentIterator<'data, 'file, Mach> { |
| type Item = MachOSegment<'data, 'file, Mach>; |
| |
| fn next(&mut self) -> Option<Self::Item> { |
| loop { |
| let command = self.commands.next().ok()??; |
| if let Ok(Some((segment, _))) = Mach::Segment::from_command(command) { |
| return Some(MachOSegment { |
| file: self.file, |
| segment, |
| }); |
| } |
| } |
| } |
| } |
| |
| /// A segment of a `MachOFile32`. |
| pub type MachOSegment32<'data, 'file, Endian = Endianness> = |
| MachOSegment<'data, 'file, macho::MachHeader32<Endian>>; |
| /// A segment of a `MachOFile64`. |
| pub type MachOSegment64<'data, 'file, Endian = Endianness> = |
| MachOSegment<'data, 'file, macho::MachHeader64<Endian>>; |
| |
| /// A segment of a `MachOFile`. |
| #[derive(Debug)] |
| pub struct MachOSegment<'data, 'file, Mach> |
| where |
| 'data: 'file, |
| Mach: MachHeader, |
| { |
| file: &'file MachOFile<'data, Mach>, |
| segment: &'data Mach::Segment, |
| } |
| |
| impl<'data, 'file, Mach: MachHeader> MachOSegment<'data, 'file, Mach> { |
| fn bytes(&self) -> Result<Bytes<'data>> { |
| self.segment |
| .data(self.file.endian, self.file.data) |
| .read_error("Invalid Mach-O segment size or offset") |
| } |
| } |
| |
| impl<'data, 'file, Mach: MachHeader> read::private::Sealed for MachOSegment<'data, 'file, Mach> {} |
| |
| impl<'data, 'file, Mach: MachHeader> ObjectSegment<'data> for MachOSegment<'data, 'file, Mach> { |
| #[inline] |
| fn address(&self) -> u64 { |
| self.segment.vmaddr(self.file.endian).into() |
| } |
| |
| #[inline] |
| fn size(&self) -> u64 { |
| self.segment.vmsize(self.file.endian).into() |
| } |
| |
| #[inline] |
| fn align(&self) -> u64 { |
| // Page size. |
| 0x1000 |
| } |
| |
| #[inline] |
| fn file_range(&self) -> (u64, u64) { |
| self.segment.file_range(self.file.endian) |
| } |
| |
| fn data(&self) -> Result<&'data [u8]> { |
| Ok(self.bytes()?.0) |
| } |
| |
| fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> { |
| Ok(read::data_range( |
| self.bytes()?, |
| self.address(), |
| address, |
| size, |
| )) |
| } |
| |
| #[inline] |
| fn name(&self) -> Result<Option<&str>> { |
| Ok(Some( |
| str::from_utf8(self.segment.name()) |
| .ok() |
| .read_error("Non UTF-8 Mach-O segment name")?, |
| )) |
| } |
| } |
| |
| /// A trait for generic access to `SegmentCommand32` and `SegmentCommand64`. |
| #[allow(missing_docs)] |
| pub trait Segment: Debug + Pod { |
| type Word: Into<u64>; |
| type Endian: endian::Endian; |
| type Section: Section<Endian = Self::Endian>; |
| |
| fn from_command(command: MachOLoadCommand<Self::Endian>) -> Result<Option<(&Self, Bytes)>>; |
| |
| fn cmd(&self, endian: Self::Endian) -> u32; |
| fn cmdsize(&self, endian: Self::Endian) -> u32; |
| fn segname(&self) -> &[u8; 16]; |
| fn vmaddr(&self, endian: Self::Endian) -> Self::Word; |
| fn vmsize(&self, endian: Self::Endian) -> Self::Word; |
| fn fileoff(&self, endian: Self::Endian) -> Self::Word; |
| fn filesize(&self, endian: Self::Endian) -> Self::Word; |
| fn maxprot(&self, endian: Self::Endian) -> u32; |
| fn initprot(&self, endian: Self::Endian) -> u32; |
| fn nsects(&self, endian: Self::Endian) -> u32; |
| fn flags(&self, endian: Self::Endian) -> u32; |
| |
| /// Return the `segname` bytes up until the null terminator. |
| fn name(&self) -> &[u8] { |
| let segname = &self.segname()[..]; |
| match segname.iter().position(|&x| x == 0) { |
| Some(end) => &segname[..end], |
| None => segname, |
| } |
| } |
| |
| /// Return the offset and size of the segment in the file. |
| fn file_range(&self, endian: Self::Endian) -> (u64, u64) { |
| (self.fileoff(endian).into(), self.filesize(endian).into()) |
| } |
| |
| /// Get the segment data from the file data. |
| /// |
| /// Returns `Err` for invalid values. |
| fn data<'data>( |
| &self, |
| endian: Self::Endian, |
| data: Bytes<'data>, |
| ) -> result::Result<Bytes<'data>, ()> { |
| let (offset, size) = self.file_range(endian); |
| data.read_bytes_at(offset as usize, size as usize) |
| } |
| |
| /// Get the array of sections from the data following the segment command. |
| /// |
| /// Returns `Err` for invalid values. |
| fn sections<'data>( |
| &self, |
| endian: Self::Endian, |
| data: Bytes<'data>, |
| ) -> Result<&'data [Self::Section]> { |
| data.read_slice_at(0, self.nsects(endian) as usize) |
| .read_error("Invalid Mach-O number of sections") |
| } |
| } |
| |
| impl<Endian: endian::Endian> Segment for macho::SegmentCommand32<Endian> { |
| type Word = u32; |
| type Endian = Endian; |
| type Section = macho::Section32<Self::Endian>; |
| |
| fn from_command(command: MachOLoadCommand<Self::Endian>) -> Result<Option<(&Self, Bytes)>> { |
| command.segment_32() |
| } |
| |
| fn cmd(&self, endian: Self::Endian) -> u32 { |
| self.cmd.get(endian) |
| } |
| fn cmdsize(&self, endian: Self::Endian) -> u32 { |
| self.cmdsize.get(endian) |
| } |
| fn segname(&self) -> &[u8; 16] { |
| &self.segname |
| } |
| fn vmaddr(&self, endian: Self::Endian) -> Self::Word { |
| self.vmaddr.get(endian) |
| } |
| fn vmsize(&self, endian: Self::Endian) -> Self::Word { |
| self.vmsize.get(endian) |
| } |
| fn fileoff(&self, endian: Self::Endian) -> Self::Word { |
| self.fileoff.get(endian) |
| } |
| fn filesize(&self, endian: Self::Endian) -> Self::Word { |
| self.filesize.get(endian) |
| } |
| fn maxprot(&self, endian: Self::Endian) -> u32 { |
| self.maxprot.get(endian) |
| } |
| fn initprot(&self, endian: Self::Endian) -> u32 { |
| self.initprot.get(endian) |
| } |
| fn nsects(&self, endian: Self::Endian) -> u32 { |
| self.nsects.get(endian) |
| } |
| fn flags(&self, endian: Self::Endian) -> u32 { |
| self.flags.get(endian) |
| } |
| } |
| |
| impl<Endian: endian::Endian> Segment for macho::SegmentCommand64<Endian> { |
| type Word = u64; |
| type Endian = Endian; |
| type Section = macho::Section64<Self::Endian>; |
| |
| fn from_command(command: MachOLoadCommand<Self::Endian>) -> Result<Option<(&Self, Bytes)>> { |
| command.segment_64() |
| } |
| |
| fn cmd(&self, endian: Self::Endian) -> u32 { |
| self.cmd.get(endian) |
| } |
| fn cmdsize(&self, endian: Self::Endian) -> u32 { |
| self.cmdsize.get(endian) |
| } |
| fn segname(&self) -> &[u8; 16] { |
| &self.segname |
| } |
| fn vmaddr(&self, endian: Self::Endian) -> Self::Word { |
| self.vmaddr.get(endian) |
| } |
| fn vmsize(&self, endian: Self::Endian) -> Self::Word { |
| self.vmsize.get(endian) |
| } |
| fn fileoff(&self, endian: Self::Endian) -> Self::Word { |
| self.fileoff.get(endian) |
| } |
| fn filesize(&self, endian: Self::Endian) -> Self::Word { |
| self.filesize.get(endian) |
| } |
| fn maxprot(&self, endian: Self::Endian) -> u32 { |
| self.maxprot.get(endian) |
| } |
| fn initprot(&self, endian: Self::Endian) -> u32 { |
| self.initprot.get(endian) |
| } |
| fn nsects(&self, endian: Self::Endian) -> u32 { |
| self.nsects.get(endian) |
| } |
| fn flags(&self, endian: Self::Endian) -> u32 { |
| self.flags.get(endian) |
| } |
| } |
