Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 1458 insertions, 0 deletions

diff --git a/vendor/gimli/src/read/rnglists.rs b/vendor/gimli/src/read/rnglists.rs
new file mode 100644
index 0000000..12e3e04
--- /dev/null
+++ b/vendor/gimli/src/read/rnglists.rs
@@ -0,0 +1,1458 @@
+use crate::common::{
+    DebugAddrBase, DebugAddrIndex, DebugRngListsBase, DebugRngListsIndex, DwarfFileType, Encoding,
+    RangeListsOffset, SectionId,
+};
+use crate::constants;
+use crate::endianity::Endianity;
+use crate::read::{
+    lists::ListsHeader, DebugAddr, EndianSlice, Error, Reader, ReaderOffset, ReaderOffsetId,
+    Result, Section,
+};
+
+/// The raw contents of the `.debug_ranges` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugRanges<R> {
+    pub(crate) section: R,
+}
+
+impl<'input, Endian> DebugRanges<EndianSlice<'input, Endian>>
+where
+    Endian: Endianity,
+{
+    /// Construct a new `DebugRanges` instance from the data in the `.debug_ranges`
+    /// section.
+    ///
+    /// It is the caller's responsibility to read the `.debug_ranges` section and
+    /// present it as a `&[u8]` slice. That means using some ELF loader on
+    /// Linux, a Mach-O loader on macOS, etc.
+    ///
+    /// ```
+    /// use gimli::{DebugRanges, LittleEndian};
+    ///
+    /// # let buf = [0x00, 0x01, 0x02, 0x03];
+    /// # let read_debug_ranges_section_somehow = || &buf;
+    /// let debug_ranges = DebugRanges::new(read_debug_ranges_section_somehow(), LittleEndian);
+    /// ```
+    pub fn new(section: &'input [u8], endian: Endian) -> Self {
+        Self::from(EndianSlice::new(section, endian))
+    }
+}
+
+impl<R> Section<R> for DebugRanges<R> {
+    fn id() -> SectionId {
+        SectionId::DebugRanges
+    }
+
+    fn reader(&self) -> &R {
+        &self.section
+    }
+}
+
+impl<R> From<R> for DebugRanges<R> {
+    fn from(section: R) -> Self {
+        DebugRanges { section }
+    }
+}
+
+/// The `DebugRngLists` struct represents the contents of the
+/// `.debug_rnglists` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugRngLists<R> {
+    section: R,
+}
+
+impl<'input, Endian> DebugRngLists<EndianSlice<'input, Endian>>
+where
+    Endian: Endianity,
+{
+    /// Construct a new `DebugRngLists` instance from the data in the
+    /// `.debug_rnglists` section.
+    ///
+    /// It is the caller's responsibility to read the `.debug_rnglists`
+    /// section and present it as a `&[u8]` slice. That means using some ELF
+    /// loader on Linux, a Mach-O loader on macOS, etc.
+    ///
+    /// ```
+    /// use gimli::{DebugRngLists, LittleEndian};
+    ///
+    /// # let buf = [0x00, 0x01, 0x02, 0x03];
+    /// # let read_debug_rnglists_section_somehow = || &buf;
+    /// let debug_rnglists =
+    ///     DebugRngLists::new(read_debug_rnglists_section_somehow(), LittleEndian);
+    /// ```
+    pub fn new(section: &'input [u8], endian: Endian) -> Self {
+        Self::from(EndianSlice::new(section, endian))
+    }
+}
+
+impl<R> Section<R> for DebugRngLists<R> {
+    fn id() -> SectionId {
+        SectionId::DebugRngLists
+    }
+
+    fn reader(&self) -> &R {
+        &self.section
+    }
+}
+
+impl<R> From<R> for DebugRngLists<R> {
+    fn from(section: R) -> Self {
+        DebugRngLists { section }
+    }
+}
+
+#[allow(unused)]
+pub(crate) type RngListsHeader = ListsHeader;
+
+impl<Offset> DebugRngListsBase<Offset>
+where
+    Offset: ReaderOffset,
+{
+    /// Returns a `DebugRngListsBase` with the default value of DW_AT_rnglists_base
+    /// for the given `Encoding` and `DwarfFileType`.
+    pub fn default_for_encoding_and_file(
+        encoding: Encoding,
+        file_type: DwarfFileType,
+    ) -> DebugRngListsBase<Offset> {
+        if encoding.version >= 5 && file_type == DwarfFileType::Dwo {
+            // In .dwo files, the compiler omits the DW_AT_rnglists_base attribute (because there is
+            // only a single unit in the file) but we must skip past the header, which the attribute
+            // would normally do for us.
+            DebugRngListsBase(Offset::from_u8(RngListsHeader::size_for_encoding(encoding)))
+        } else {
+            DebugRngListsBase(Offset::from_u8(0))
+        }
+    }
+}
+
+/// The DWARF data found in `.debug_ranges` and `.debug_rnglists` sections.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct RangeLists<R> {
+    debug_ranges: DebugRanges<R>,
+    debug_rnglists: DebugRngLists<R>,
+}
+
+impl<R> RangeLists<R> {
+    /// Construct a new `RangeLists` instance from the data in the `.debug_ranges` and
+    /// `.debug_rnglists` sections.
+    pub fn new(debug_ranges: DebugRanges<R>, debug_rnglists: DebugRngLists<R>) -> RangeLists<R> {
+        RangeLists {
+            debug_ranges,
+            debug_rnglists,
+        }
+    }
+
+    /// Return the `.debug_ranges` section.
+    pub fn debug_ranges(&self) -> &DebugRanges<R> {
+        &self.debug_ranges
+    }
+
+    /// Replace the `.debug_ranges` section.
+    ///
+    /// This is useful for `.dwo` files when using the GNU split-dwarf extension to DWARF 4.
+    pub fn set_debug_ranges(&mut self, debug_ranges: DebugRanges<R>) {
+        self.debug_ranges = debug_ranges;
+    }
+
+    /// Return the `.debug_rnglists` section.
+    pub fn debug_rnglists(&self) -> &DebugRngLists<R> {
+        &self.debug_rnglists
+    }
+}
+
+impl<T> RangeLists<T> {
+    /// Create a `RangeLists` that references the data in `self`.
+    ///
+    /// This is useful when `R` implements `Reader` but `T` does not.
+    ///
+    /// ## Example Usage
+    ///
+    /// ```rust,no_run
+    /// # let load_section = || unimplemented!();
+    /// // Read the DWARF section into a `Vec` with whatever object loader you're using.
+    /// let owned_section: gimli::RangeLists<Vec<u8>> = load_section();
+    /// // Create a reference to the DWARF section.
+    /// let section = owned_section.borrow(|section| {
+    ///     gimli::EndianSlice::new(&section, gimli::LittleEndian)
+    /// });
+    /// ```
+    pub fn borrow<'a, F, R>(&'a self, mut borrow: F) -> RangeLists<R>
+    where
+        F: FnMut(&'a T) -> R,
+    {
+        RangeLists {
+            debug_ranges: borrow(&self.debug_ranges.section).into(),
+            debug_rnglists: borrow(&self.debug_rnglists.section).into(),
+        }
+    }
+}
+
+impl<R: Reader> RangeLists<R> {
+    /// Iterate over the `Range` list entries starting at the given offset.
+    ///
+    /// The `unit_version` and `address_size` must match the compilation unit that the
+    /// offset was contained in.
+    ///
+    /// The `base_address` should be obtained from the `DW_AT_low_pc` attribute in the
+    /// `DW_TAG_compile_unit` entry for the compilation unit that contains this range list.
+    ///
+    /// Can be [used with
+    /// `FallibleIterator`](./index.html#using-with-fallibleiterator).
+    pub fn ranges(
+        &self,
+        offset: RangeListsOffset<R::Offset>,
+        unit_encoding: Encoding,
+        base_address: u64,
+        debug_addr: &DebugAddr<R>,
+        debug_addr_base: DebugAddrBase<R::Offset>,
+    ) -> Result<RngListIter<R>> {
+        Ok(RngListIter::new(
+            self.raw_ranges(offset, unit_encoding)?,
+            base_address,
+            debug_addr.clone(),
+            debug_addr_base,
+        ))
+    }
+
+    /// Iterate over the `RawRngListEntry`ies starting at the given offset.
+    ///
+    /// The `unit_encoding` must match the compilation unit that the
+    /// offset was contained in.
+    ///
+    /// This iterator does not perform any processing of the range entries,
+    /// such as handling base addresses.
+    ///
+    /// Can be [used with
+    /// `FallibleIterator`](./index.html#using-with-fallibleiterator).
+    pub fn raw_ranges(
+        &self,
+        offset: RangeListsOffset<R::Offset>,
+        unit_encoding: Encoding,
+    ) -> Result<RawRngListIter<R>> {
+        let (mut input, format) = if unit_encoding.version <= 4 {
+            (self.debug_ranges.section.clone(), RangeListsFormat::Bare)
+        } else {
+            (self.debug_rnglists.section.clone(), RangeListsFormat::Rle)
+        };
+        input.skip(offset.0)?;
+        Ok(RawRngListIter::new(input, unit_encoding, format))
+    }
+
+    /// Returns the `.debug_rnglists` offset at the given `base` and `index`.
+    ///
+    /// The `base` must be the `DW_AT_rnglists_base` value from the compilation unit DIE.
+    /// This is an offset that points to the first entry following the header.
+    ///
+    /// The `index` is the value of a `DW_FORM_rnglistx` attribute.
+    ///
+    /// The `unit_encoding` must match the compilation unit that the
+    /// index was contained in.
+    pub fn get_offset(
+        &self,
+        unit_encoding: Encoding,
+        base: DebugRngListsBase<R::Offset>,
+        index: DebugRngListsIndex<R::Offset>,
+    ) -> Result<RangeListsOffset<R::Offset>> {
+        let format = unit_encoding.format;
+        let input = &mut self.debug_rnglists.section.clone();
+        input.skip(base.0)?;
+        input.skip(R::Offset::from_u64(
+            index.0.into_u64() * u64::from(format.word_size()),
+        )?)?;
+        input
+            .read_offset(format)
+            .map(|x| RangeListsOffset(base.0 + x))
+    }
+
+    /// Call `Reader::lookup_offset_id` for each section, and return the first match.
+    pub fn lookup_offset_id(&self, id: ReaderOffsetId) -> Option<(SectionId, R::Offset)> {
+        self.debug_ranges
+            .lookup_offset_id(id)
+            .or_else(|| self.debug_rnglists.lookup_offset_id(id))
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum RangeListsFormat {
+    /// The bare range list format used before DWARF 5.
+    Bare,
+    /// The DW_RLE encoded range list format used in DWARF 5.
+    Rle,
+}
+
+/// A raw iterator over an address range list.
+///
+/// This iterator does not perform any processing of the range entries,
+/// such as handling base addresses.
+#[derive(Debug)]
+pub struct RawRngListIter<R: Reader> {
+    input: R,
+    encoding: Encoding,
+    format: RangeListsFormat,
+}
+
+/// A raw entry in .debug_rnglists
+#[derive(Clone, Debug)]
+pub enum RawRngListEntry<T> {
+    /// A range from DWARF version <= 4.
+    AddressOrOffsetPair {
+        /// Start of range. May be an address or an offset.
+        begin: u64,
+        /// End of range. May be an address or an offset.
+        end: u64,
+    },
+    /// DW_RLE_base_address
+    BaseAddress {
+        /// base address
+        addr: u64,
+    },
+    /// DW_RLE_base_addressx
+    BaseAddressx {
+        /// base address
+        addr: DebugAddrIndex<T>,
+    },
+    /// DW_RLE_startx_endx
+    StartxEndx {
+        /// start of range
+        begin: DebugAddrIndex<T>,
+        /// end of range
+        end: DebugAddrIndex<T>,
+    },
+    /// DW_RLE_startx_length
+    StartxLength {
+        /// start of range
+        begin: DebugAddrIndex<T>,
+        /// length of range
+        length: u64,
+    },
+    /// DW_RLE_offset_pair
+    OffsetPair {
+        /// start of range
+        begin: u64,
+        /// end of range
+        end: u64,
+    },
+    /// DW_RLE_start_end
+    StartEnd {
+        /// start of range
+        begin: u64,
+        /// end of range
+        end: u64,
+    },
+    /// DW_RLE_start_length
+    StartLength {
+        /// start of range
+        begin: u64,
+        /// length of range
+        length: u64,
+    },
+}
+
+impl<T: ReaderOffset> RawRngListEntry<T> {
+    /// Parse a range entry from `.debug_rnglists`
+    fn parse<R: Reader<Offset = T>>(
+        input: &mut R,
+        encoding: Encoding,
+        format: RangeListsFormat,
+    ) -> Result<Option<Self>> {
+        Ok(match format {
+            RangeListsFormat::Bare => {
+                let range = RawRange::parse(input, encoding.address_size)?;
+                if range.is_end() {
+                    None
+                } else if range.is_base_address(encoding.address_size) {
+                    Some(RawRngListEntry::BaseAddress { addr: range.end })
+                } else {
+                    Some(RawRngListEntry::AddressOrOffsetPair {
+                        begin: range.begin,
+                        end: range.end,
+                    })
+                }
+            }
+            RangeListsFormat::Rle => match constants::DwRle(input.read_u8()?) {
+                constants::DW_RLE_end_of_list => None,
+                constants::DW_RLE_base_addressx => Some(RawRngListEntry::BaseAddressx {
+                    addr: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                }),
+                constants::DW_RLE_startx_endx => Some(RawRngListEntry::StartxEndx {
+                    begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                    end: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                }),
+                constants::DW_RLE_startx_length => Some(RawRngListEntry::StartxLength {
+                    begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                    length: input.read_uleb128()?,
+                }),
+                constants::DW_RLE_offset_pair => Some(RawRngListEntry::OffsetPair {
+                    begin: input.read_uleb128()?,
+                    end: input.read_uleb128()?,
+                }),
+                constants::DW_RLE_base_address => Some(RawRngListEntry::BaseAddress {
+                    addr: input.read_address(encoding.address_size)?,
+                }),
+                constants::DW_RLE_start_end => Some(RawRngListEntry::StartEnd {
+                    begin: input.read_address(encoding.address_size)?,
+                    end: input.read_address(encoding.address_size)?,
+                }),
+                constants::DW_RLE_start_length => Some(RawRngListEntry::StartLength {
+                    begin: input.read_address(encoding.address_size)?,
+                    length: input.read_uleb128()?,
+                }),
+                _ => {
+                    return Err(Error::InvalidAddressRange);
+                }
+            },
+        })
+    }
+}
+
+impl<R: Reader> RawRngListIter<R> {
+    /// Construct a `RawRngListIter`.
+    fn new(input: R, encoding: Encoding, format: RangeListsFormat) -> RawRngListIter<R> {
+        RawRngListIter {
+            input,
+            encoding,
+            format,
+        }
+    }
+
+    /// Advance the iterator to the next range.
+    pub fn next(&mut self) -> Result<Option<RawRngListEntry<R::Offset>>> {
+        if self.input.is_empty() {
+            return Ok(None);
+        }
+
+        match RawRngListEntry::parse(&mut self.input, self.encoding, self.format) {
+            Ok(range) => {
+                if range.is_none() {
+                    self.input.empty();
+                }
+                Ok(range)
+            }
+            Err(e) => {
+                self.input.empty();
+                Err(e)
+            }
+        }
+    }
+}
+
+#[cfg(feature = "fallible-iterator")]
+impl<R: Reader> fallible_iterator::FallibleIterator for RawRngListIter<R> {
+    type Item = RawRngListEntry<R::Offset>;
+    type Error = Error;
+
+    fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
+        RawRngListIter::next(self)
+    }
+}
+
+/// An iterator over an address range list.
+///
+/// This iterator internally handles processing of base addresses and different
+/// entry types.  Thus, it only returns range entries that are valid
+/// and already adjusted for the base address.
+#[derive(Debug)]
+pub struct RngListIter<R: Reader> {
+    raw: RawRngListIter<R>,
+    base_address: u64,
+    debug_addr: DebugAddr<R>,
+    debug_addr_base: DebugAddrBase<R::Offset>,
+}
+
+impl<R: Reader> RngListIter<R> {
+    /// Construct a `RngListIter`.
+    fn new(
+        raw: RawRngListIter<R>,
+        base_address: u64,
+        debug_addr: DebugAddr<R>,
+        debug_addr_base: DebugAddrBase<R::Offset>,
+    ) -> RngListIter<R> {
+        RngListIter {
+            raw,
+            base_address,
+            debug_addr,
+            debug_addr_base,
+        }
+    }
+
+    #[inline]
+    fn get_address(&self, index: DebugAddrIndex<R::Offset>) -> Result<u64> {
+        self.debug_addr
+            .get_address(self.raw.encoding.address_size, self.debug_addr_base, index)
+    }
+
+    /// Advance the iterator to the next range.
+    pub fn next(&mut self) -> Result<Option<Range>> {
+        loop {
+            let raw_range = match self.raw.next()? {
+                Some(range) => range,
+                None => return Ok(None),
+            };
+
+            let range = self.convert_raw(raw_range)?;
+            if range.is_some() {
+                return Ok(range);
+            }
+        }
+    }
+
+    /// Return the next raw range.
+    ///
+    /// The raw range should be passed to `convert_range`.
+    #[doc(hidden)]
+    pub fn next_raw(&mut self) -> Result<Option<RawRngListEntry<R::Offset>>> {
+        self.raw.next()
+    }
+
+    /// Convert a raw range into a range, and update the state of the iterator.
+    ///
+    /// The raw range should have been obtained from `next_raw`.
+    #[doc(hidden)]
+    pub fn convert_raw(&mut self, raw_range: RawRngListEntry<R::Offset>) -> Result<Option<Range>> {
+        let mask = !0 >> (64 - self.raw.encoding.address_size * 8);
+        let tombstone = if self.raw.encoding.version <= 4 {
+            mask - 1
+        } else {
+            mask
+        };
+
+        let range = match raw_range {
+            RawRngListEntry::BaseAddress { addr } => {
+                self.base_address = addr;
+                return Ok(None);
+            }
+            RawRngListEntry::BaseAddressx { addr } => {
+                self.base_address = self.get_address(addr)?;
+                return Ok(None);
+            }
+            RawRngListEntry::StartxEndx { begin, end } => {
+                let begin = self.get_address(begin)?;
+                let end = self.get_address(end)?;
+                Range { begin, end }
+            }
+            RawRngListEntry::StartxLength { begin, length } => {
+                let begin = self.get_address(begin)?;
+                let end = begin.wrapping_add(length) & mask;
+                Range { begin, end }
+            }
+            RawRngListEntry::AddressOrOffsetPair { begin, end }
+            | RawRngListEntry::OffsetPair { begin, end } => {
+                if self.base_address == tombstone {
+                    return Ok(None);
+                }
+                let mut range = Range { begin, end };
+                range.add_base_address(self.base_address, self.raw.encoding.address_size);
+                range
+            }
+            RawRngListEntry::StartEnd { begin, end } => Range { begin, end },
+            RawRngListEntry::StartLength { begin, length } => {
+                let end = begin.wrapping_add(length) & mask;
+                Range { begin, end }
+            }
+        };
+
+        if range.begin == tombstone {
+            return Ok(None);
+        }
+
+        if range.begin > range.end {
+            self.raw.input.empty();
+            return Err(Error::InvalidAddressRange);
+        }
+
+        Ok(Some(range))
+    }
+}
+
+#[cfg(feature = "fallible-iterator")]
+impl<R: Reader> fallible_iterator::FallibleIterator for RngListIter<R> {
+    type Item = Range;
+    type Error = Error;
+
+    fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
+        RngListIter::next(self)
+    }
+}
+
+/// A raw address range from the `.debug_ranges` section.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub(crate) struct RawRange {
+    /// The beginning address of the range.
+    pub begin: u64,
+
+    /// The first address past the end of the range.
+    pub end: u64,
+}
+
+impl RawRange {
+    /// Check if this is a range end entry.
+    #[inline]
+    pub fn is_end(&self) -> bool {
+        self.begin == 0 && self.end == 0
+    }
+
+    /// Check if this is a base address selection entry.
+    ///
+    /// A base address selection entry changes the base address that subsequent
+    /// range entries are relative to.
+    #[inline]
+    pub fn is_base_address(&self, address_size: u8) -> bool {
+        self.begin == !0 >> (64 - address_size * 8)
+    }
+
+    /// Parse an address range entry from `.debug_ranges` or `.debug_loc`.
+    #[inline]
+    pub fn parse<R: Reader>(input: &mut R, address_size: u8) -> Result<RawRange> {
+        let begin = input.read_address(address_size)?;
+        let end = input.read_address(address_size)?;
+        let range = RawRange { begin, end };
+        Ok(range)
+    }
+}
+
+/// An address range from the `.debug_ranges`, `.debug_rnglists`, or `.debug_aranges` sections.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct Range {
+    /// The beginning address of the range.
+    pub begin: u64,
+
+    /// The first address past the end of the range.
+    pub end: u64,
+}
+
+impl Range {
+    /// Add a base address to this range.
+    #[inline]
+    pub(crate) fn add_base_address(&mut self, base_address: u64, address_size: u8) {
+        let mask = !0 >> (64 - address_size * 8);
+        self.begin = base_address.wrapping_add(self.begin) & mask;
+        self.end = base_address.wrapping_add(self.end) & mask;
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::common::Format;
+    use crate::endianity::LittleEndian;
+    use crate::test_util::GimliSectionMethods;
+    use test_assembler::{Endian, Label, LabelMaker, Section};
+
+    #[test]
+    fn test_rnglists_32() {
+        let tombstone = !0u32;
+        let encoding = Encoding {
+            format: Format::Dwarf32,
+            version: 5,
+            address_size: 4,
+        };
+        let section = Section::with_endian(Endian::Little)
+            .L32(0x0300_0000)
+            .L32(0x0301_0300)
+            .L32(0x0301_0400)
+            .L32(0x0301_0500)
+            .L32(tombstone)
+            .L32(0x0301_0600);
+        let buf = section.get_contents().unwrap();
+        let debug_addr = &DebugAddr::from(EndianSlice::new(&buf, LittleEndian));
+        let debug_addr_base = DebugAddrBase(0);
+
+        let start = Label::new();
+        let first = Label::new();
+        let size = Label::new();
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // Header
+            .mark(&start)
+            .L32(&size)
+            .L16(encoding.version)
+            .L8(encoding.address_size)
+            .L8(0)
+            .L32(0)
+            .mark(&first)
+            // An OffsetPair using the unit base address.
+            .L8(4).uleb(0x10200).uleb(0x10300)
+            // A base address selection followed by an OffsetPair.
+            .L8(5).L32(0x0200_0000)
+            .L8(4).uleb(0x10400).uleb(0x10500)
+            // An empty OffsetPair followed by a normal OffsetPair.
+            .L8(4).uleb(0x10600).uleb(0x10600)
+            .L8(4).uleb(0x10800).uleb(0x10900)
+            // A StartEnd
+            .L8(6).L32(0x201_0a00).L32(0x201_0b00)
+            // A StartLength
+            .L8(7).L32(0x201_0c00).uleb(0x100)
+            // An OffsetPair that starts at 0.
+            .L8(4).uleb(0).uleb(1)
+            // An OffsetPair that starts and ends at 0.
+            .L8(4).uleb(0).uleb(0)
+            // An OffsetPair that ends at -1.
+            .L8(5).L32(0)
+            .L8(4).uleb(0).uleb(0xffff_ffff)
+            // A BaseAddressx + OffsetPair
+            .L8(1).uleb(0)
+            .L8(4).uleb(0x10100).uleb(0x10200)
+            // A StartxEndx
+            .L8(2).uleb(1).uleb(2)
+            // A StartxLength
+            .L8(3).uleb(3).uleb(0x100)
+
+            // Tombstone entries, all of which should be ignored.
+            // A BaseAddressx that is a tombstone.
+            .L8(1).uleb(4)
+            .L8(4).uleb(0x11100).uleb(0x11200)
+            // A BaseAddress that is a tombstone.
+            .L8(5).L32(tombstone)
+            .L8(4).uleb(0x11300).uleb(0x11400)
+            // A StartxEndx that is a tombstone.
+            .L8(2).uleb(4).uleb(5)
+            // A StartxLength that is a tombstone.
+            .L8(3).uleb(4).uleb(0x100)
+            // A StartEnd that is a tombstone.
+            .L8(6).L32(tombstone).L32(0x201_1500)
+            // A StartLength that is a tombstone.
+            .L8(7).L32(tombstone).uleb(0x100)
+            // A StartEnd (not ignored)
+            .L8(6).L32(0x201_1600).L32(0x201_1700)
+
+            // A range end.
+            .L8(0)
+            // Some extra data.
+            .L32(0xffff_ffff);
+        size.set_const((&section.here() - &start - 4) as u64);
+
+        let buf = section.get_contents().unwrap();
+        let debug_ranges = DebugRanges::new(&[], LittleEndian);
+        let debug_rnglists = DebugRngLists::new(&buf, LittleEndian);
+        let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
+        let offset = RangeListsOffset((&first - &start) as usize);
+        let mut ranges = rnglists
+            .ranges(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0101_0200,
+                end: 0x0101_0300,
+            }))
+        );
+
+        // A base address selection followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0400,
+                end: 0x0201_0500,
+            }))
+        );
+
+        // An empty range followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0600,
+                end: 0x0201_0600,
+            }))
+        );
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0800,
+                end: 0x0201_0900,
+            }))
+        );
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0a00,
+                end: 0x0201_0b00,
+            }))
+        );
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0c00,
+                end: 0x0201_0d00,
+            }))
+        );
+
+        // A range that starts at 0.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0200_0000,
+                end: 0x0200_0001,
+            }))
+        );
+
+        // A range that starts and ends at 0.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0200_0000,
+                end: 0x0200_0000,
+            }))
+        );
+
+        // A range that ends at -1.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0000_0000,
+                end: 0xffff_ffff,
+            }))
+        );
+
+        // A BaseAddressx + OffsetPair
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0301_0100,
+                end: 0x0301_0200,
+            }))
+        );
+
+        // A StartxEndx
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0301_0300,
+                end: 0x0301_0400,
+            }))
+        );
+
+        // A StartxLength
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0301_0500,
+                end: 0x0301_0600,
+            }))
+        );
+
+        // A StartEnd range following the tombstones
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_1600,
+                end: 0x0201_1700,
+            }))
+        );
+
+        // A range end.
+        assert_eq!(ranges.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut ranges = rnglists
+            .ranges(
+                RangeListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(ranges.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_rnglists_64() {
+        let tombstone = !0u64;
+        let encoding = Encoding {
+            format: Format::Dwarf64,
+            version: 5,
+            address_size: 8,
+        };
+        let section = Section::with_endian(Endian::Little)
+            .L64(0x0300_0000)
+            .L64(0x0301_0300)
+            .L64(0x0301_0400)
+            .L64(0x0301_0500)
+            .L64(tombstone)
+            .L64(0x0301_0600);
+        let buf = section.get_contents().unwrap();
+        let debug_addr = &DebugAddr::from(EndianSlice::new(&buf, LittleEndian));
+        let debug_addr_base = DebugAddrBase(0);
+
+        let start = Label::new();
+        let first = Label::new();
+        let size = Label::new();
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // Header
+            .mark(&start)
+            .L32(0xffff_ffff)
+            .L64(&size)
+            .L16(encoding.version)
+            .L8(encoding.address_size)
+            .L8(0)
+            .L32(0)
+            .mark(&first)
+            // An OffsetPair using the unit base address.
+            .L8(4).uleb(0x10200).uleb(0x10300)
+            // A base address selection followed by an OffsetPair.
+            .L8(5).L64(0x0200_0000)
+            .L8(4).uleb(0x10400).uleb(0x10500)
+            // An empty OffsetPair followed by a normal OffsetPair.
+            .L8(4).uleb(0x10600).uleb(0x10600)
+            .L8(4).uleb(0x10800).uleb(0x10900)
+            // A StartEnd
+            .L8(6).L64(0x201_0a00).L64(0x201_0b00)
+            // A StartLength
+            .L8(7).L64(0x201_0c00).uleb(0x100)
+            // An OffsetPair that starts at 0.
+            .L8(4).uleb(0).uleb(1)
+            // An OffsetPair that starts and ends at 0.
+            .L8(4).uleb(0).uleb(0)
+            // An OffsetPair that ends at -1.
+            .L8(5).L64(0)
+            .L8(4).uleb(0).uleb(0xffff_ffff)
+            // A BaseAddressx + OffsetPair
+            .L8(1).uleb(0)
+            .L8(4).uleb(0x10100).uleb(0x10200)
+            // A StartxEndx
+            .L8(2).uleb(1).uleb(2)
+            // A StartxLength
+            .L8(3).uleb(3).uleb(0x100)
+
+            // Tombstone entries, all of which should be ignored.
+            // A BaseAddressx that is a tombstone.
+            .L8(1).uleb(4)
+            .L8(4).uleb(0x11100).uleb(0x11200)
+            // A BaseAddress that is a tombstone.
+            .L8(5).L64(tombstone)
+            .L8(4).uleb(0x11300).uleb(0x11400)
+            // A StartxEndx that is a tombstone.
+            .L8(2).uleb(4).uleb(5)
+            // A StartxLength that is a tombstone.
+            .L8(3).uleb(4).uleb(0x100)
+            // A StartEnd that is a tombstone.
+            .L8(6).L64(tombstone).L64(0x201_1500)
+            // A StartLength that is a tombstone.
+            .L8(7).L64(tombstone).uleb(0x100)
+            // A StartEnd (not ignored)
+            .L8(6).L64(0x201_1600).L64(0x201_1700)
+
+            // A range end.
+            .L8(0)
+            // Some extra data.
+            .L32(0xffff_ffff);
+        size.set_const((&section.here() - &start - 12) as u64);
+
+        let buf = section.get_contents().unwrap();
+        let debug_ranges = DebugRanges::new(&[], LittleEndian);
+        let debug_rnglists = DebugRngLists::new(&buf, LittleEndian);
+        let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
+        let offset = RangeListsOffset((&first - &start) as usize);
+        let mut ranges = rnglists
+            .ranges(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0101_0200,
+                end: 0x0101_0300,
+            }))
+        );
+
+        // A base address selection followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0400,
+                end: 0x0201_0500,
+            }))
+        );
+
+        // An empty range followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0600,
+                end: 0x0201_0600,
+            }))
+        );
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0800,
+                end: 0x0201_0900,
+            }))
+        );
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0a00,
+                end: 0x0201_0b00,
+            }))
+        );
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0c00,
+                end: 0x0201_0d00,
+            }))
+        );
+
+        // A range that starts at 0.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0200_0000,
+                end: 0x0200_0001,
+            }))
+        );
+
+        // A range that starts and ends at 0.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0200_0000,
+                end: 0x0200_0000,
+            }))
+        );
+
+        // A range that ends at -1.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0000_0000,
+                end: 0xffff_ffff,
+            }))
+        );
+
+        // A BaseAddressx + OffsetPair
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0301_0100,
+                end: 0x0301_0200,
+            }))
+        );
+
+        // A StartxEndx
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0301_0300,
+                end: 0x0301_0400,
+            }))
+        );
+
+        // A StartxLength
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0301_0500,
+                end: 0x0301_0600,
+            }))
+        );
+
+        // A StartEnd range following the tombstones
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_1600,
+                end: 0x0201_1700,
+            }))
+        );
+
+        // A range end.
+        assert_eq!(ranges.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut ranges = rnglists
+            .ranges(
+                RangeListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(ranges.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_raw_range() {
+        let range = RawRange {
+            begin: 0,
+            end: 0xffff_ffff,
+        };
+        assert!(!range.is_end());
+        assert!(!range.is_base_address(4));
+        assert!(!range.is_base_address(8));
+
+        let range = RawRange { begin: 0, end: 0 };
+        assert!(range.is_end());
+        assert!(!range.is_base_address(4));
+        assert!(!range.is_base_address(8));
+
+        let range = RawRange {
+            begin: 0xffff_ffff,
+            end: 0,
+        };
+        assert!(!range.is_end());
+        assert!(range.is_base_address(4));
+        assert!(!range.is_base_address(8));
+
+        let range = RawRange {
+            begin: 0xffff_ffff_ffff_ffff,
+            end: 0,
+        };
+        assert!(!range.is_end());
+        assert!(!range.is_base_address(4));
+        assert!(range.is_base_address(8));
+    }
+
+    #[test]
+    fn test_ranges_32() {
+        let tombstone = !0u32 - 1;
+        let start = Label::new();
+        let first = Label::new();
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // A range before the offset.
+            .mark(&start)
+            .L32(0x10000).L32(0x10100)
+            .mark(&first)
+            // A normal range.
+            .L32(0x10200).L32(0x10300)
+            // A base address selection followed by a normal range.
+            .L32(0xffff_ffff).L32(0x0200_0000)
+            .L32(0x10400).L32(0x10500)
+            // An empty range followed by a normal range.
+            .L32(0x10600).L32(0x10600)
+            .L32(0x10800).L32(0x10900)
+            // A range that starts at 0.
+            .L32(0).L32(1)
+            // A range that ends at -1.
+            .L32(0xffff_ffff).L32(0x0000_0000)
+            .L32(0).L32(0xffff_ffff)
+            // A normal range with tombstone.
+            .L32(tombstone).L32(tombstone)
+            // A base address selection with tombstone followed by a normal range.
+            .L32(0xffff_ffff).L32(tombstone)
+            .L32(0x10a00).L32(0x10b00)
+            // A range end.
+            .L32(0).L32(0)
+            // Some extra data.
+            .L32(0);
+
+        let buf = section.get_contents().unwrap();
+        let debug_ranges = DebugRanges::new(&buf, LittleEndian);
+        let debug_rnglists = DebugRngLists::new(&[], LittleEndian);
+        let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
+        let offset = RangeListsOffset((&first - &start) as usize);
+        let debug_addr = &DebugAddr::from(EndianSlice::new(&[], LittleEndian));
+        let debug_addr_base = DebugAddrBase(0);
+        let encoding = Encoding {
+            format: Format::Dwarf32,
+            version: 4,
+            address_size: 4,
+        };
+        let mut ranges = rnglists
+            .ranges(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0101_0200,
+                end: 0x0101_0300,
+            }))
+        );
+
+        // A base address selection followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0400,
+                end: 0x0201_0500,
+            }))
+        );
+
+        // An empty range followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0600,
+                end: 0x0201_0600,
+            }))
+        );
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0800,
+                end: 0x0201_0900,
+            }))
+        );
+
+        // A range that starts at 0.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0200_0000,
+                end: 0x0200_0001,
+            }))
+        );
+
+        // A range that ends at -1.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0000_0000,
+                end: 0xffff_ffff,
+            }))
+        );
+
+        // A range end.
+        assert_eq!(ranges.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut ranges = rnglists
+            .ranges(
+                RangeListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(ranges.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_ranges_64() {
+        let tombstone = !0u64 - 1;
+        let start = Label::new();
+        let first = Label::new();
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // A range before the offset.
+            .mark(&start)
+            .L64(0x10000).L64(0x10100)
+            .mark(&first)
+            // A normal range.
+            .L64(0x10200).L64(0x10300)
+            // A base address selection followed by a normal range.
+            .L64(0xffff_ffff_ffff_ffff).L64(0x0200_0000)
+            .L64(0x10400).L64(0x10500)
+            // An empty range followed by a normal range.
+            .L64(0x10600).L64(0x10600)
+            .L64(0x10800).L64(0x10900)
+            // A range that starts at 0.
+            .L64(0).L64(1)
+            // A range that ends at -1.
+            .L64(0xffff_ffff_ffff_ffff).L64(0x0000_0000)
+            .L64(0).L64(0xffff_ffff_ffff_ffff)
+            // A normal range with tombstone.
+            .L64(tombstone).L64(tombstone)
+            // A base address selection with tombstone followed by a normal range.
+            .L64(0xffff_ffff_ffff_ffff).L64(tombstone)
+            .L64(0x10a00).L64(0x10b00)
+            // A range end.
+            .L64(0).L64(0)
+            // Some extra data.
+            .L64(0);
+
+        let buf = section.get_contents().unwrap();
+        let debug_ranges = DebugRanges::new(&buf, LittleEndian);
+        let debug_rnglists = DebugRngLists::new(&[], LittleEndian);
+        let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
+        let offset = RangeListsOffset((&first - &start) as usize);
+        let debug_addr = &DebugAddr::from(EndianSlice::new(&[], LittleEndian));
+        let debug_addr_base = DebugAddrBase(0);
+        let encoding = Encoding {
+            format: Format::Dwarf64,
+            version: 4,
+            address_size: 8,
+        };
+        let mut ranges = rnglists
+            .ranges(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0101_0200,
+                end: 0x0101_0300,
+            }))
+        );
+
+        // A base address selection followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0400,
+                end: 0x0201_0500,
+            }))
+        );
+
+        // An empty range followed by a normal range.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0600,
+                end: 0x0201_0600,
+            }))
+        );
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0201_0800,
+                end: 0x0201_0900,
+            }))
+        );
+
+        // A range that starts at 0.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0200_0000,
+                end: 0x0200_0001,
+            }))
+        );
+
+        // A range that ends at -1.
+        assert_eq!(
+            ranges.next(),
+            Ok(Some(Range {
+                begin: 0x0,
+                end: 0xffff_ffff_ffff_ffff,
+            }))
+        );
+
+        // A range end.
+        assert_eq!(ranges.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut ranges = rnglists
+            .ranges(
+                RangeListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(ranges.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_ranges_invalid() {
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // An invalid range.
+            .L32(0x20000).L32(0x10000)
+            // An invalid range after wrapping.
+            .L32(0x20000).L32(0xff01_0000);
+
+        let buf = section.get_contents().unwrap();
+        let debug_ranges = DebugRanges::new(&buf, LittleEndian);
+        let debug_rnglists = DebugRngLists::new(&[], LittleEndian);
+        let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
+        let debug_addr = &DebugAddr::from(EndianSlice::new(&[], LittleEndian));
+        let debug_addr_base = DebugAddrBase(0);
+        let encoding = Encoding {
+            format: Format::Dwarf32,
+            version: 4,
+            address_size: 4,
+        };
+
+        // An invalid range.
+        let mut ranges = rnglists
+            .ranges(
+                RangeListsOffset(0x0),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(ranges.next(), Err(Error::InvalidAddressRange));
+
+        // An invalid range after wrapping.
+        let mut ranges = rnglists
+            .ranges(
+                RangeListsOffset(0x8),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(ranges.next(), Err(Error::InvalidAddressRange));
+
+        // An invalid offset.
+        match rnglists.ranges(
+            RangeListsOffset(buf.len() + 1),
+            encoding,
+            0x0100_0000,
+            debug_addr,
+            debug_addr_base,
+        ) {
+            Err(Error::UnexpectedEof(_)) => {}
+            otherwise => panic!("Unexpected result: {:?}", otherwise),
+        }
+    }
+
+    #[test]
+    fn test_get_offset() {
+        for format in vec![Format::Dwarf32, Format::Dwarf64] {
+            let encoding = Encoding {
+                format,
+                version: 5,
+                address_size: 4,
+            };
+
+            let zero = Label::new();
+            let length = Label::new();
+            let start = Label::new();
+            let first = Label::new();
+            let end = Label::new();
+            let mut section = Section::with_endian(Endian::Little)
+                .mark(&zero)
+                .initial_length(format, &length, &start)
+                .D16(encoding.version)
+                .D8(encoding.address_size)
+                .D8(0)
+                .D32(20)
+                .mark(&first);
+            for i in 0..20 {
+                section = section.word(format.word_size(), 1000 + i);
+            }
+            section = section.mark(&end);
+            length.set_const((&end - &start) as u64);
+            let section = section.get_contents().unwrap();
+
+            let debug_ranges = DebugRanges::from(EndianSlice::new(&[], LittleEndian));
+            let debug_rnglists = DebugRngLists::from(EndianSlice::new(&section, LittleEndian));
+            let ranges = RangeLists::new(debug_ranges, debug_rnglists);
+
+            let base = DebugRngListsBase((&first - &zero) as usize);
+            assert_eq!(
+                ranges.get_offset(encoding, base, DebugRngListsIndex(0)),
+                Ok(RangeListsOffset(base.0 + 1000))
+            );
+            assert_eq!(
+                ranges.get_offset(encoding, base, DebugRngListsIndex(19)),
+                Ok(RangeListsOffset(base.0 + 1019))
+            );
+        }
+    }
+}