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gimli 0.17.0

A library for reading and writing the DWARF debugging format.
Documentation 
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/// Whether the format of a compilation unit is 32- or 64-bit.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum Format {
    /// 64-bit DWARF
    Dwarf64,
    /// 32-bit DWARF
    Dwarf32,
}

impl Format {
    /// Return the serialized size of an initial length field for the format.
    #[inline]
    pub fn initial_length_size(self) -> u8 {
        match self {
            Format::Dwarf32 => 4,
            Format::Dwarf64 => 12,
        }
    }

    /// Return the natural word size for the format
    #[inline]
    pub fn word_size(self) -> u8 {
        match self {
            Format::Dwarf32 => 4,
            Format::Dwarf64 => 8,
        }
    }
}

/// Encoding parameters that are commonly used for multiple DWARF sections.
///
/// This is intended to be small enough to pass by value.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct Encoding {
    /// Whether the DWARF format is 32- or 64-bit.
    pub format: Format,

    /// The DWARF version of the header.
    pub version: u16,

    /// The size of an address.
    pub address_size: u8,
    // The size of a segment selector.
    // TODO: pub segment_size: u8,
}

/// Encoding parameters for a line number program.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct LineEncoding {
    /// The size in bytes of the smallest target machine instruction.
    pub minimum_instruction_length: u8,

    /// The maximum number of individual operations that may be encoded in an
    /// instruction.
    pub maximum_operations_per_instruction: u8,

    /// The initial value of the `is_stmt` register.
    pub default_is_stmt: bool,

    /// The minimum value which a special opcode can add to the line register.
    pub line_base: i8,

    /// The range of values which a special opcode can add to the line register.
    pub line_range: u8,
}

impl Default for LineEncoding {
    fn default() -> Self {
        // Values from LLVM.
        LineEncoding {
            minimum_instruction_length: 1,
            maximum_operations_per_instruction: 1,
            default_is_stmt: true,
            line_base: -5,
            line_range: 14,
        }
    }
}

/// A DWARF register number.
///
/// The meaning of this value is ABI dependent. This is generally encoded as
/// a ULEB128, but supported architectures need 16 bits at most.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub struct Register(pub u16);

/// An offset into the `.debug_abbrev` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct DebugAbbrevOffset<T = usize>(pub T);

/// An offset to a set of entries in the `.debug_addr` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugAddrBase<T = usize>(pub T);

/// An index into a set of addresses in the `.debug_addr` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugAddrIndex<T = usize>(pub T);

/// An offset into the `.debug_info` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Ord, PartialOrd, Hash)]
pub struct DebugInfoOffset<T = usize>(pub T);

/// An offset into the `.debug_line` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugLineOffset<T = usize>(pub T);

/// An offset into the `.debug_line_str` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugLineStrOffset<T = usize>(pub T);

/// An offset into either the `.debug_loc` section or the `.debug_loclists` section,
/// depending on the version of the unit the offset was contained in.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct LocationListsOffset<T = usize>(pub T);

/// An offset to a set of location list offsets in the `.debug_loclists` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugLocListsBase<T = usize>(pub T);

/// An index into a set of location list offsets in the `.debug_loclists` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugLocListsIndex<T = usize>(pub T);

/// An offset into the `.debug_macinfo` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct DebugMacinfoOffset<T = usize>(pub T);

/// An offset into either the `.debug_ranges` section or the `.debug_rnglists` section,
/// depending on the version of the unit the offset was contained in.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct RangeListsOffset<T = usize>(pub T);

/// An offset to a set of range list offsets in the `.debug_rnglists` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugRngListsBase<T = usize>(pub T);

/// An index into a set of range list offsets in the `.debug_rnglists` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugRngListsIndex<T = usize>(pub T);

/// An offset into the `.debug_str` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugStrOffset<T = usize>(pub T);

/// An offset to a set of entries in the `.debug_str_offsets` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugStrOffsetsBase<T = usize>(pub T);

/// An index into a set of entries in the `.debug_str_offsets` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DebugStrOffsetsIndex<T = usize>(pub T);

/// An offset into the `.debug_types` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Ord, PartialOrd, Hash)]
pub struct DebugTypesOffset<T = usize>(pub T);

/// A type signature as used in the `.debug_types` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct DebugTypeSignature(pub u64);

/// An offset into the `.debug_frame` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct DebugFrameOffset<T = usize>(pub T);

impl<T> From<T> for DebugFrameOffset<T> {
    #[inline]
    fn from(o: T) -> Self {
        DebugFrameOffset(o)
    }
}

/// An offset into the `.eh_frame` section.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct EhFrameOffset<T = usize>(pub T);

impl<T> From<T> for EhFrameOffset<T> {
    #[inline]
    fn from(o: T) -> Self {
        EhFrameOffset(o)
    }
}

/// An offset into the `.debug_info` or `.debug_types` sections.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Ord, PartialOrd, Hash)]
pub enum UnitSectionOffset<T = usize> {
    /// An offset into the `.debug_info` section.
    DebugInfoOffset(DebugInfoOffset<T>),
    /// An offset into the `.debug_types` section.
    DebugTypesOffset(DebugTypesOffset<T>),
}