Initial vendor packages

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

1 files changed, 1627 insertions, 0 deletions

diff --git a/vendor/gimli/src/read/loclists.rs b/vendor/gimli/src/read/loclists.rs
new file mode 100644
index 0000000..5cba675
--- /dev/null
+++ b/vendor/gimli/src/read/loclists.rs
@@ -0,0 +1,1627 @@
+use crate::common::{
+    DebugAddrBase, DebugAddrIndex, DebugLocListsBase, DebugLocListsIndex, DwarfFileType, Encoding,
+    LocationListsOffset, SectionId,
+};
+use crate::constants;
+use crate::endianity::Endianity;
+use crate::read::{
+    lists::ListsHeader, DebugAddr, EndianSlice, Error, Expression, Range, RawRange, Reader,
+    ReaderOffset, ReaderOffsetId, Result, Section,
+};
+
+/// The raw contents of the `.debug_loc` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugLoc<R> {
+    pub(crate) section: R,
+}
+
+impl<'input, Endian> DebugLoc<EndianSlice<'input, Endian>>
+where
+    Endian: Endianity,
+{
+    /// Construct a new `DebugLoc` instance from the data in the `.debug_loc`
+    /// section.
+    ///
+    /// It is the caller's responsibility to read the `.debug_loc` 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::{DebugLoc, LittleEndian};
+    ///
+    /// # let buf = [0x00, 0x01, 0x02, 0x03];
+    /// # let read_debug_loc_section_somehow = || &buf;
+    /// let debug_loc = DebugLoc::new(read_debug_loc_section_somehow(), LittleEndian);
+    /// ```
+    pub fn new(section: &'input [u8], endian: Endian) -> Self {
+        Self::from(EndianSlice::new(section, endian))
+    }
+}
+
+impl<R> Section<R> for DebugLoc<R> {
+    fn id() -> SectionId {
+        SectionId::DebugLoc
+    }
+
+    fn reader(&self) -> &R {
+        &self.section
+    }
+}
+
+impl<R> From<R> for DebugLoc<R> {
+    fn from(section: R) -> Self {
+        DebugLoc { section }
+    }
+}
+
+/// The `DebugLocLists` struct represents the DWARF data
+/// found in the `.debug_loclists` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugLocLists<R> {
+    section: R,
+}
+
+impl<'input, Endian> DebugLocLists<EndianSlice<'input, Endian>>
+where
+    Endian: Endianity,
+{
+    /// Construct a new `DebugLocLists` instance from the data in the `.debug_loclists`
+    /// section.
+    ///
+    /// It is the caller's responsibility to read the `.debug_loclists` 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::{DebugLocLists, LittleEndian};
+    ///
+    /// # let buf = [0x00, 0x01, 0x02, 0x03];
+    /// # let read_debug_loclists_section_somehow = || &buf;
+    /// let debug_loclists = DebugLocLists::new(read_debug_loclists_section_somehow(), LittleEndian);
+    /// ```
+    pub fn new(section: &'input [u8], endian: Endian) -> Self {
+        Self::from(EndianSlice::new(section, endian))
+    }
+}
+
+impl<R> Section<R> for DebugLocLists<R> {
+    fn id() -> SectionId {
+        SectionId::DebugLocLists
+    }
+
+    fn reader(&self) -> &R {
+        &self.section
+    }
+}
+
+impl<R> From<R> for DebugLocLists<R> {
+    fn from(section: R) -> Self {
+        DebugLocLists { section }
+    }
+}
+
+pub(crate) type LocListsHeader = ListsHeader;
+
+impl<Offset> DebugLocListsBase<Offset>
+where
+    Offset: ReaderOffset,
+{
+    /// Returns a `DebugLocListsBase` with the default value of DW_AT_loclists_base
+    /// for the given `Encoding` and `DwarfFileType`.
+    pub fn default_for_encoding_and_file(
+        encoding: Encoding,
+        file_type: DwarfFileType,
+    ) -> DebugLocListsBase<Offset> {
+        if encoding.version >= 5 && file_type == DwarfFileType::Dwo {
+            // In .dwo files, the compiler omits the DW_AT_loclists_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.
+            DebugLocListsBase(Offset::from_u8(LocListsHeader::size_for_encoding(encoding)))
+        } else {
+            DebugLocListsBase(Offset::from_u8(0))
+        }
+    }
+}
+
+/// The DWARF data found in `.debug_loc` and `.debug_loclists` sections.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct LocationLists<R> {
+    debug_loc: DebugLoc<R>,
+    debug_loclists: DebugLocLists<R>,
+}
+
+impl<R> LocationLists<R> {
+    /// Construct a new `LocationLists` instance from the data in the `.debug_loc` and
+    /// `.debug_loclists` sections.
+    pub fn new(debug_loc: DebugLoc<R>, debug_loclists: DebugLocLists<R>) -> LocationLists<R> {
+        LocationLists {
+            debug_loc,
+            debug_loclists,
+        }
+    }
+}
+
+impl<T> LocationLists<T> {
+    /// Create a `LocationLists` 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::LocationLists<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) -> LocationLists<R>
+    where
+        F: FnMut(&'a T) -> R,
+    {
+        LocationLists {
+            debug_loc: borrow(&self.debug_loc.section).into(),
+            debug_loclists: borrow(&self.debug_loclists.section).into(),
+        }
+    }
+}
+
+impl<R: Reader> LocationLists<R> {
+    /// Iterate over the `LocationListEntry`s starting at the given offset.
+    ///
+    /// The `unit_encoding` 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 location
+    /// list.
+    ///
+    /// Can be [used with
+    /// `FallibleIterator`](./index.html#using-with-fallibleiterator).
+    pub fn locations(
+        &self,
+        offset: LocationListsOffset<R::Offset>,
+        unit_encoding: Encoding,
+        base_address: u64,
+        debug_addr: &DebugAddr<R>,
+        debug_addr_base: DebugAddrBase<R::Offset>,
+    ) -> Result<LocListIter<R>> {
+        Ok(LocListIter::new(
+            self.raw_locations(offset, unit_encoding)?,
+            base_address,
+            debug_addr.clone(),
+            debug_addr_base,
+        ))
+    }
+
+    /// Similar to `locations`, but with special handling for .dwo files.
+    /// This should only been used when this `LocationLists` was loaded from a
+    /// .dwo file.
+    pub fn locations_dwo(
+        &self,
+        offset: LocationListsOffset<R::Offset>,
+        unit_encoding: Encoding,
+        base_address: u64,
+        debug_addr: &DebugAddr<R>,
+        debug_addr_base: DebugAddrBase<R::Offset>,
+    ) -> Result<LocListIter<R>> {
+        Ok(LocListIter::new(
+            self.raw_locations_dwo(offset, unit_encoding)?,
+            base_address,
+            debug_addr.clone(),
+            debug_addr_base,
+        ))
+    }
+
+    /// Iterate over the raw `LocationListEntry`s 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 location entries,
+    /// such as handling base addresses.
+    ///
+    /// Can be [used with
+    /// `FallibleIterator`](./index.html#using-with-fallibleiterator).
+    pub fn raw_locations(
+        &self,
+        offset: LocationListsOffset<R::Offset>,
+        unit_encoding: Encoding,
+    ) -> Result<RawLocListIter<R>> {
+        let (mut input, format) = if unit_encoding.version <= 4 {
+            (self.debug_loc.section.clone(), LocListsFormat::Bare)
+        } else {
+            (self.debug_loclists.section.clone(), LocListsFormat::Lle)
+        };
+        input.skip(offset.0)?;
+        Ok(RawLocListIter::new(input, unit_encoding, format))
+    }
+
+    /// Similar to `raw_locations`, but with special handling for .dwo files.
+    /// This should only been used when this `LocationLists` was loaded from a
+    /// .dwo file.
+    pub fn raw_locations_dwo(
+        &self,
+        offset: LocationListsOffset<R::Offset>,
+        unit_encoding: Encoding,
+    ) -> Result<RawLocListIter<R>> {
+        let mut input = if unit_encoding.version <= 4 {
+            // In the GNU split dwarf extension the locations are present in the
+            // .debug_loc section but are encoded with the DW_LLE values used
+            // for the DWARF 5 .debug_loclists section.
+            self.debug_loc.section.clone()
+        } else {
+            self.debug_loclists.section.clone()
+        };
+        input.skip(offset.0)?;
+        Ok(RawLocListIter::new(
+            input,
+            unit_encoding,
+            LocListsFormat::Lle,
+        ))
+    }
+
+    /// Returns the `.debug_loclists` offset at the given `base` and `index`.
+    ///
+    /// The `base` must be the `DW_AT_loclists_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_loclistx` attribute.
+    pub fn get_offset(
+        &self,
+        unit_encoding: Encoding,
+        base: DebugLocListsBase<R::Offset>,
+        index: DebugLocListsIndex<R::Offset>,
+    ) -> Result<LocationListsOffset<R::Offset>> {
+        let format = unit_encoding.format;
+        let input = &mut self.debug_loclists.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| LocationListsOffset(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_loc
+            .lookup_offset_id(id)
+            .or_else(|| self.debug_loclists.lookup_offset_id(id))
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum LocListsFormat {
+    /// The bare location list format used before DWARF 5.
+    Bare,
+    /// The DW_LLE encoded range list format used in DWARF 5 and the non-standard GNU
+    /// split dwarf extension.
+    Lle,
+}
+
+/// A raw iterator over a location list.
+///
+/// This iterator does not perform any processing of the location entries,
+/// such as handling base addresses.
+#[derive(Debug)]
+pub struct RawLocListIter<R: Reader> {
+    input: R,
+    encoding: Encoding,
+    format: LocListsFormat,
+}
+
+/// A raw entry in .debug_loclists.
+#[derive(Clone, Debug)]
+pub enum RawLocListEntry<R: Reader> {
+    /// A location 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,
+        /// expression
+        data: Expression<R>,
+    },
+    /// DW_LLE_base_address
+    BaseAddress {
+        /// base address
+        addr: u64,
+    },
+    /// DW_LLE_base_addressx
+    BaseAddressx {
+        /// base address
+        addr: DebugAddrIndex<R::Offset>,
+    },
+    /// DW_LLE_startx_endx
+    StartxEndx {
+        /// start of range
+        begin: DebugAddrIndex<R::Offset>,
+        /// end of range
+        end: DebugAddrIndex<R::Offset>,
+        /// expression
+        data: Expression<R>,
+    },
+    /// DW_LLE_startx_length
+    StartxLength {
+        /// start of range
+        begin: DebugAddrIndex<R::Offset>,
+        /// length of range
+        length: u64,
+        /// expression
+        data: Expression<R>,
+    },
+    /// DW_LLE_offset_pair
+    OffsetPair {
+        /// start of range
+        begin: u64,
+        /// end of range
+        end: u64,
+        /// expression
+        data: Expression<R>,
+    },
+    /// DW_LLE_default_location
+    DefaultLocation {
+        /// expression
+        data: Expression<R>,
+    },
+    /// DW_LLE_start_end
+    StartEnd {
+        /// start of range
+        begin: u64,
+        /// end of range
+        end: u64,
+        /// expression
+        data: Expression<R>,
+    },
+    /// DW_LLE_start_length
+    StartLength {
+        /// start of range
+        begin: u64,
+        /// length of range
+        length: u64,
+        /// expression
+        data: Expression<R>,
+    },
+}
+
+fn parse_data<R: Reader>(input: &mut R, encoding: Encoding) -> Result<Expression<R>> {
+    if encoding.version >= 5 {
+        let len = R::Offset::from_u64(input.read_uleb128()?)?;
+        Ok(Expression(input.split(len)?))
+    } else {
+        // In the GNU split-dwarf extension this is a fixed 2 byte value.
+        let len = R::Offset::from_u16(input.read_u16()?);
+        Ok(Expression(input.split(len)?))
+    }
+}
+
+impl<R: Reader> RawLocListEntry<R> {
+    /// Parse a location list entry from `.debug_loclists`
+    fn parse(input: &mut R, encoding: Encoding, format: LocListsFormat) -> Result<Option<Self>> {
+        Ok(match format {
+            LocListsFormat::Bare => {
+                let range = RawRange::parse(input, encoding.address_size)?;
+                if range.is_end() {
+                    None
+                } else if range.is_base_address(encoding.address_size) {
+                    Some(RawLocListEntry::BaseAddress { addr: range.end })
+                } else {
+                    let len = R::Offset::from_u16(input.read_u16()?);
+                    let data = Expression(input.split(len)?);
+                    Some(RawLocListEntry::AddressOrOffsetPair {
+                        begin: range.begin,
+                        end: range.end,
+                        data,
+                    })
+                }
+            }
+            LocListsFormat::Lle => match constants::DwLle(input.read_u8()?) {
+                constants::DW_LLE_end_of_list => None,
+                constants::DW_LLE_base_addressx => Some(RawLocListEntry::BaseAddressx {
+                    addr: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                }),
+                constants::DW_LLE_startx_endx => Some(RawLocListEntry::StartxEndx {
+                    begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                    end: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                    data: parse_data(input, encoding)?,
+                }),
+                constants::DW_LLE_startx_length => Some(RawLocListEntry::StartxLength {
+                    begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
+                    length: if encoding.version >= 5 {
+                        input.read_uleb128()?
+                    } else {
+                        // In the GNU split-dwarf extension this is a fixed 4 byte value.
+                        input.read_u32()? as u64
+                    },
+                    data: parse_data(input, encoding)?,
+                }),
+                constants::DW_LLE_offset_pair => Some(RawLocListEntry::OffsetPair {
+                    begin: input.read_uleb128()?,
+                    end: input.read_uleb128()?,
+                    data: parse_data(input, encoding)?,
+                }),
+                constants::DW_LLE_default_location => Some(RawLocListEntry::DefaultLocation {
+                    data: parse_data(input, encoding)?,
+                }),
+                constants::DW_LLE_base_address => Some(RawLocListEntry::BaseAddress {
+                    addr: input.read_address(encoding.address_size)?,
+                }),
+                constants::DW_LLE_start_end => Some(RawLocListEntry::StartEnd {
+                    begin: input.read_address(encoding.address_size)?,
+                    end: input.read_address(encoding.address_size)?,
+                    data: parse_data(input, encoding)?,
+                }),
+                constants::DW_LLE_start_length => Some(RawLocListEntry::StartLength {
+                    begin: input.read_address(encoding.address_size)?,
+                    length: input.read_uleb128()?,
+                    data: parse_data(input, encoding)?,
+                }),
+                _ => {
+                    return Err(Error::InvalidAddressRange);
+                }
+            },
+        })
+    }
+}
+
+impl<R: Reader> RawLocListIter<R> {
+    /// Construct a `RawLocListIter`.
+    fn new(input: R, encoding: Encoding, format: LocListsFormat) -> RawLocListIter<R> {
+        RawLocListIter {
+            input,
+            encoding,
+            format,
+        }
+    }
+
+    /// Advance the iterator to the next location.
+    pub fn next(&mut self) -> Result<Option<RawLocListEntry<R>>> {
+        if self.input.is_empty() {
+            return Ok(None);
+        }
+
+        match RawLocListEntry::parse(&mut self.input, self.encoding, self.format) {
+            Ok(entry) => {
+                if entry.is_none() {
+                    self.input.empty();
+                }
+                Ok(entry)
+            }
+            Err(e) => {
+                self.input.empty();
+                Err(e)
+            }
+        }
+    }
+}
+
+#[cfg(feature = "fallible-iterator")]
+impl<R: Reader> fallible_iterator::FallibleIterator for RawLocListIter<R> {
+    type Item = RawLocListEntry<R>;
+    type Error = Error;
+
+    fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
+        RawLocListIter::next(self)
+    }
+}
+
+/// An iterator over a location list.
+///
+/// This iterator internally handles processing of base address selection entries
+/// and list end entries.  Thus, it only returns location entries that are valid
+/// and already adjusted for the base address.
+#[derive(Debug)]
+pub struct LocListIter<R: Reader> {
+    raw: RawLocListIter<R>,
+    base_address: u64,
+    debug_addr: DebugAddr<R>,
+    debug_addr_base: DebugAddrBase<R::Offset>,
+}
+
+impl<R: Reader> LocListIter<R> {
+    /// Construct a `LocListIter`.
+    fn new(
+        raw: RawLocListIter<R>,
+        base_address: u64,
+        debug_addr: DebugAddr<R>,
+        debug_addr_base: DebugAddrBase<R::Offset>,
+    ) -> LocListIter<R> {
+        LocListIter {
+            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 location.
+    pub fn next(&mut self) -> Result<Option<LocationListEntry<R>>> {
+        loop {
+            let raw_loc = match self.raw.next()? {
+                Some(loc) => loc,
+                None => return Ok(None),
+            };
+
+            let loc = self.convert_raw(raw_loc)?;
+            if loc.is_some() {
+                return Ok(loc);
+            }
+        }
+    }
+
+    /// Return the next raw location.
+    ///
+    /// The raw location should be passed to `convert_raw`.
+    #[doc(hidden)]
+    pub fn next_raw(&mut self) -> Result<Option<RawLocListEntry<R>>> {
+        self.raw.next()
+    }
+
+    /// Convert a raw location into a location, and update the state of the iterator.
+    ///
+    /// The raw location should have been obtained from `next_raw`.
+    #[doc(hidden)]
+    pub fn convert_raw(
+        &mut self,
+        raw_loc: RawLocListEntry<R>,
+    ) -> Result<Option<LocationListEntry<R>>> {
+        let mask = !0 >> (64 - self.raw.encoding.address_size * 8);
+        let tombstone = if self.raw.encoding.version <= 4 {
+            mask - 1
+        } else {
+            mask
+        };
+
+        let (range, data) = match raw_loc {
+            RawLocListEntry::BaseAddress { addr } => {
+                self.base_address = addr;
+                return Ok(None);
+            }
+            RawLocListEntry::BaseAddressx { addr } => {
+                self.base_address = self.get_address(addr)?;
+                return Ok(None);
+            }
+            RawLocListEntry::StartxEndx { begin, end, data } => {
+                let begin = self.get_address(begin)?;
+                let end = self.get_address(end)?;
+                (Range { begin, end }, data)
+            }
+            RawLocListEntry::StartxLength {
+                begin,
+                length,
+                data,
+            } => {
+                let begin = self.get_address(begin)?;
+                let end = begin.wrapping_add(length) & mask;
+                (Range { begin, end }, data)
+            }
+            RawLocListEntry::DefaultLocation { data } => (
+                Range {
+                    begin: 0,
+                    end: u64::max_value(),
+                },
+                data,
+            ),
+            RawLocListEntry::AddressOrOffsetPair { begin, end, data }
+            | RawLocListEntry::OffsetPair { begin, end, data } => {
+                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, data)
+            }
+            RawLocListEntry::StartEnd { begin, end, data } => (Range { begin, end }, data),
+            RawLocListEntry::StartLength {
+                begin,
+                length,
+                data,
+            } => {
+                let end = begin.wrapping_add(length) & mask;
+                (Range { begin, end }, data)
+            }
+        };
+
+        if range.begin == tombstone {
+            return Ok(None);
+        }
+
+        if range.begin > range.end {
+            self.raw.input.empty();
+            return Err(Error::InvalidLocationAddressRange);
+        }
+
+        Ok(Some(LocationListEntry { range, data }))
+    }
+}
+
+#[cfg(feature = "fallible-iterator")]
+impl<R: Reader> fallible_iterator::FallibleIterator for LocListIter<R> {
+    type Item = LocationListEntry<R>;
+    type Error = Error;
+
+    fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
+        LocListIter::next(self)
+    }
+}
+
+/// A location list entry from the `.debug_loc` or `.debug_loclists` sections.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct LocationListEntry<R: Reader> {
+    /// The address range that this location is valid for.
+    pub range: Range,
+
+    /// The data containing a single location description.
+    pub data: Expression<R>,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::common::Format;
+    use crate::endianity::LittleEndian;
+    use crate::read::{EndianSlice, Range};
+    use crate::test_util::GimliSectionMethods;
+    use test_assembler::{Endian, Label, LabelMaker, Section};
+
+    #[test]
+    fn test_loclists_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)
+            // OffsetPair
+            .L8(4).uleb(0x10200).uleb(0x10300).uleb(4).L32(2)
+            // A base address selection followed by an OffsetPair.
+            .L8(6).L32(0x0200_0000)
+            .L8(4).uleb(0x10400).uleb(0x10500).uleb(4).L32(3)
+            // An empty OffsetPair followed by a normal OffsetPair.
+            .L8(4).uleb(0x10600).uleb(0x10600).uleb(4).L32(4)
+            .L8(4).uleb(0x10800).uleb(0x10900).uleb(4).L32(5)
+            // A StartEnd
+            .L8(7).L32(0x201_0a00).L32(0x201_0b00).uleb(4).L32(6)
+            // A StartLength
+            .L8(8).L32(0x201_0c00).uleb(0x100).uleb(4).L32(7)
+            // An OffsetPair that starts at 0.
+            .L8(4).uleb(0).uleb(1).uleb(4).L32(8)
+            // An OffsetPair that ends at -1.
+            .L8(6).L32(0)
+            .L8(4).uleb(0).uleb(0xffff_ffff).uleb(4).L32(9)
+            // A DefaultLocation
+            .L8(5).uleb(4).L32(10)
+            // A BaseAddressx + OffsetPair
+            .L8(1).uleb(0)
+            .L8(4).uleb(0x10100).uleb(0x10200).uleb(4).L32(11)
+            // A StartxEndx
+            .L8(2).uleb(1).uleb(2).uleb(4).L32(12)
+            // A StartxLength
+            .L8(3).uleb(3).uleb(0x100).uleb(4).L32(13)
+
+            // Tombstone entries, all of which should be ignored.
+            // A BaseAddressx that is a tombstone.
+            .L8(1).uleb(4)
+            .L8(4).uleb(0x11100).uleb(0x11200).uleb(4).L32(20)
+            // A BaseAddress that is a tombstone.
+            .L8(6).L32(tombstone)
+            .L8(4).uleb(0x11300).uleb(0x11400).uleb(4).L32(21)
+            // A StartxEndx that is a tombstone.
+            .L8(2).uleb(4).uleb(5).uleb(4).L32(22)
+            // A StartxLength that is a tombstone.
+            .L8(3).uleb(4).uleb(0x100).uleb(4).L32(23)
+            // A StartEnd that is a tombstone.
+            .L8(7).L32(tombstone).L32(0x201_1500).uleb(4).L32(24)
+            // A StartLength that is a tombstone.
+            .L8(8).L32(tombstone).uleb(0x100).uleb(4).L32(25)
+            // A StartEnd (not ignored)
+            .L8(7).L32(0x201_1600).L32(0x201_1700).uleb(4).L32(26)
+
+            // 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_loc = DebugLoc::new(&[], LittleEndian);
+        let debug_loclists = DebugLocLists::new(&buf, LittleEndian);
+        let loclists = LocationLists::new(debug_loc, debug_loclists);
+        let offset = LocationListsOffset((&first - &start) as usize);
+        let mut locations = loclists
+            .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0101_0200,
+                    end: 0x0101_0300,
+                },
+                data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A base address selection followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0400,
+                    end: 0x0201_0500,
+                },
+                data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // An empty location range followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0600,
+                    end: 0x0201_0600,
+                },
+                data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+            }))
+        );
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0800,
+                    end: 0x0201_0900,
+                },
+                data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0a00,
+                    end: 0x0201_0b00,
+                },
+                data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0c00,
+                    end: 0x0201_0d00,
+                },
+                data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that starts at 0.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0200_0000,
+                    end: 0x0200_0001,
+                },
+                data: Expression(EndianSlice::new(&[8, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that ends at -1.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0000_0000,
+                    end: 0xffff_ffff,
+                },
+                data: Expression(EndianSlice::new(&[9, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A DefaultLocation.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0,
+                    end: u64::max_value(),
+                },
+                data: Expression(EndianSlice::new(&[10, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A BaseAddressx + OffsetPair
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0301_0100,
+                    end: 0x0301_0200,
+                },
+                data: Expression(EndianSlice::new(&[11, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A StartxEndx
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0301_0300,
+                    end: 0x0301_0400,
+                },
+                data: Expression(EndianSlice::new(&[12, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A StartxLength
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0301_0500,
+                    end: 0x0301_0600,
+                },
+                data: Expression(EndianSlice::new(&[13, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A StartEnd location following the tombstones
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_1600,
+                    end: 0x0201_1700,
+                },
+                data: Expression(EndianSlice::new(&[26, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location list end.
+        assert_eq!(locations.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut locations = loclists
+            .locations(
+                LocationListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(locations.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_loclists_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)
+            // OffsetPair
+            .L8(4).uleb(0x10200).uleb(0x10300).uleb(4).L32(2)
+            // A base address selection followed by an OffsetPair.
+            .L8(6).L64(0x0200_0000)
+            .L8(4).uleb(0x10400).uleb(0x10500).uleb(4).L32(3)
+            // An empty OffsetPair followed by a normal OffsetPair.
+            .L8(4).uleb(0x10600).uleb(0x10600).uleb(4).L32(4)
+            .L8(4).uleb(0x10800).uleb(0x10900).uleb(4).L32(5)
+            // A StartEnd
+            .L8(7).L64(0x201_0a00).L64(0x201_0b00).uleb(4).L32(6)
+            // A StartLength
+            .L8(8).L64(0x201_0c00).uleb(0x100).uleb(4).L32(7)
+            // An OffsetPair that starts at 0.
+            .L8(4).uleb(0).uleb(1).uleb(4).L32(8)
+            // An OffsetPair that ends at -1.
+            .L8(6).L64(0)
+            .L8(4).uleb(0).uleb(0xffff_ffff).uleb(4).L32(9)
+            // A DefaultLocation
+            .L8(5).uleb(4).L32(10)
+            // A BaseAddressx + OffsetPair
+            .L8(1).uleb(0)
+            .L8(4).uleb(0x10100).uleb(0x10200).uleb(4).L32(11)
+            // A StartxEndx
+            .L8(2).uleb(1).uleb(2).uleb(4).L32(12)
+            // A StartxLength
+            .L8(3).uleb(3).uleb(0x100).uleb(4).L32(13)
+
+            // Tombstone entries, all of which should be ignored.
+            // A BaseAddressx that is a tombstone.
+            .L8(1).uleb(4)
+            .L8(4).uleb(0x11100).uleb(0x11200).uleb(4).L32(20)
+            // A BaseAddress that is a tombstone.
+            .L8(6).L64(tombstone)
+            .L8(4).uleb(0x11300).uleb(0x11400).uleb(4).L32(21)
+            // A StartxEndx that is a tombstone.
+            .L8(2).uleb(4).uleb(5).uleb(4).L32(22)
+            // A StartxLength that is a tombstone.
+            .L8(3).uleb(4).uleb(0x100).uleb(4).L32(23)
+            // A StartEnd that is a tombstone.
+            .L8(7).L64(tombstone).L64(0x201_1500).uleb(4).L32(24)
+            // A StartLength that is a tombstone.
+            .L8(8).L64(tombstone).uleb(0x100).uleb(4).L32(25)
+            // A StartEnd (not ignored)
+            .L8(7).L64(0x201_1600).L64(0x201_1700).uleb(4).L32(26)
+
+            // 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_loc = DebugLoc::new(&[], LittleEndian);
+        let debug_loclists = DebugLocLists::new(&buf, LittleEndian);
+        let loclists = LocationLists::new(debug_loc, debug_loclists);
+        let offset = LocationListsOffset((&first - &start) as usize);
+        let mut locations = loclists
+            .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0101_0200,
+                    end: 0x0101_0300,
+                },
+                data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A base address selection followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0400,
+                    end: 0x0201_0500,
+                },
+                data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // An empty location range followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0600,
+                    end: 0x0201_0600,
+                },
+                data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+            }))
+        );
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0800,
+                    end: 0x0201_0900,
+                },
+                data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0a00,
+                    end: 0x0201_0b00,
+                },
+                data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0c00,
+                    end: 0x0201_0d00,
+                },
+                data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that starts at 0.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0200_0000,
+                    end: 0x0200_0001,
+                },
+                data: Expression(EndianSlice::new(&[8, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that ends at -1.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0000_0000,
+                    end: 0xffff_ffff,
+                },
+                data: Expression(EndianSlice::new(&[9, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A DefaultLocation.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0,
+                    end: u64::max_value(),
+                },
+                data: Expression(EndianSlice::new(&[10, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A BaseAddressx + OffsetPair
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0301_0100,
+                    end: 0x0301_0200,
+                },
+                data: Expression(EndianSlice::new(&[11, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A StartxEndx
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0301_0300,
+                    end: 0x0301_0400,
+                },
+                data: Expression(EndianSlice::new(&[12, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A StartxLength
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0301_0500,
+                    end: 0x0301_0600,
+                },
+                data: Expression(EndianSlice::new(&[13, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A StartEnd location following the tombstones
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_1600,
+                    end: 0x0201_1700,
+                },
+                data: Expression(EndianSlice::new(&[26, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location list end.
+        assert_eq!(locations.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut locations = loclists
+            .locations(
+                LocationListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(locations.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_location_list_32() {
+        let tombstone = !0u32 - 1;
+        let start = Label::new();
+        let first = Label::new();
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // A location before the offset.
+            .mark(&start)
+            .L32(0x10000).L32(0x10100).L16(4).L32(1)
+            .mark(&first)
+            // A normal location.
+            .L32(0x10200).L32(0x10300).L16(4).L32(2)
+            // A base address selection followed by a normal location.
+            .L32(0xffff_ffff).L32(0x0200_0000)
+            .L32(0x10400).L32(0x10500).L16(4).L32(3)
+            // An empty location range followed by a normal location.
+            .L32(0x10600).L32(0x10600).L16(4).L32(4)
+            .L32(0x10800).L32(0x10900).L16(4).L32(5)
+            // A location range that starts at 0.
+            .L32(0).L32(1).L16(4).L32(6)
+            // A location range that ends at -1.
+            .L32(0xffff_ffff).L32(0x0000_0000)
+            .L32(0).L32(0xffff_ffff).L16(4).L32(7)
+            // A normal location with tombstone.
+            .L32(tombstone).L32(tombstone).L16(4).L32(8)
+            // A base address selection with tombstone followed by a normal location.
+            .L32(0xffff_ffff).L32(tombstone)
+            .L32(0x10a00).L32(0x10b00).L16(4).L32(9)
+            // A location list end.
+            .L32(0).L32(0)
+            // Some extra data.
+            .L32(0);
+
+        let buf = section.get_contents().unwrap();
+        let debug_loc = DebugLoc::new(&buf, LittleEndian);
+        let debug_loclists = DebugLocLists::new(&[], LittleEndian);
+        let loclists = LocationLists::new(debug_loc, debug_loclists);
+        let offset = LocationListsOffset((&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 locations = loclists
+            .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0101_0200,
+                    end: 0x0101_0300,
+                },
+                data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A base address selection followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0400,
+                    end: 0x0201_0500,
+                },
+                data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // An empty location range followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0600,
+                    end: 0x0201_0600,
+                },
+                data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+            }))
+        );
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0800,
+                    end: 0x0201_0900,
+                },
+                data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that starts at 0.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0200_0000,
+                    end: 0x0200_0001,
+                },
+                data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that ends at -1.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0000_0000,
+                    end: 0xffff_ffff,
+                },
+                data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location list end.
+        assert_eq!(locations.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut locations = loclists
+            .locations(
+                LocationListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(locations.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_location_list_64() {
+        let tombstone = !0u64 - 1;
+        let start = Label::new();
+        let first = Label::new();
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // A location before the offset.
+            .mark(&start)
+            .L64(0x10000).L64(0x10100).L16(4).L32(1)
+            .mark(&first)
+            // A normal location.
+            .L64(0x10200).L64(0x10300).L16(4).L32(2)
+            // A base address selection followed by a normal location.
+            .L64(0xffff_ffff_ffff_ffff).L64(0x0200_0000)
+            .L64(0x10400).L64(0x10500).L16(4).L32(3)
+            // An empty location range followed by a normal location.
+            .L64(0x10600).L64(0x10600).L16(4).L32(4)
+            .L64(0x10800).L64(0x10900).L16(4).L32(5)
+            // A location range that starts at 0.
+            .L64(0).L64(1).L16(4).L32(6)
+            // A location range that ends at -1.
+            .L64(0xffff_ffff_ffff_ffff).L64(0x0000_0000)
+            .L64(0).L64(0xffff_ffff_ffff_ffff).L16(4).L32(7)
+            // A normal location with tombstone.
+            .L64(tombstone).L64(tombstone).L16(4).L32(8)
+            // A base address selection with tombstone followed by a normal location.
+            .L64(0xffff_ffff_ffff_ffff).L64(tombstone)
+            .L64(0x10a00).L64(0x10b00).L16(4).L32(9)
+            // A location list end.
+            .L64(0).L64(0)
+            // Some extra data.
+            .L64(0);
+
+        let buf = section.get_contents().unwrap();
+        let debug_loc = DebugLoc::new(&buf, LittleEndian);
+        let debug_loclists = DebugLocLists::new(&[], LittleEndian);
+        let loclists = LocationLists::new(debug_loc, debug_loclists);
+        let offset = LocationListsOffset((&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 locations = loclists
+            .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+            .unwrap();
+
+        // A normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0101_0200,
+                    end: 0x0101_0300,
+                },
+                data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A base address selection followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0400,
+                    end: 0x0201_0500,
+                },
+                data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // An empty location range followed by a normal location.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0600,
+                    end: 0x0201_0600,
+                },
+                data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+            }))
+        );
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0201_0800,
+                    end: 0x0201_0900,
+                },
+                data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that starts at 0.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0200_0000,
+                    end: 0x0200_0001,
+                },
+                data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location range that ends at -1.
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0,
+                    end: 0xffff_ffff_ffff_ffff,
+                },
+                data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+            }))
+        );
+
+        // A location list end.
+        assert_eq!(locations.next(), Ok(None));
+
+        // An offset at the end of buf.
+        let mut locations = loclists
+            .locations(
+                LocationListsOffset(buf.len()),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(locations.next(), Ok(None));
+    }
+
+    #[test]
+    fn test_locations_invalid() {
+        #[rustfmt::skip]
+        let section = Section::with_endian(Endian::Little)
+            // An invalid location range.
+            .L32(0x20000).L32(0x10000).L16(4).L32(1)
+            // An invalid range after wrapping.
+            .L32(0x20000).L32(0xff01_0000).L16(4).L32(2);
+
+        let buf = section.get_contents().unwrap();
+        let debug_loc = DebugLoc::new(&buf, LittleEndian);
+        let debug_loclists = DebugLocLists::new(&[], LittleEndian);
+        let loclists = LocationLists::new(debug_loc, debug_loclists);
+        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 location range.
+        let mut locations = loclists
+            .locations(
+                LocationListsOffset(0x0),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(locations.next(), Err(Error::InvalidLocationAddressRange));
+
+        // An invalid location range after wrapping.
+        let mut locations = loclists
+            .locations(
+                LocationListsOffset(14),
+                encoding,
+                0x0100_0000,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(locations.next(), Err(Error::InvalidLocationAddressRange));
+
+        // An invalid offset.
+        match loclists.locations(
+            LocationListsOffset(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_loc = DebugLoc::from(EndianSlice::new(&[], LittleEndian));
+            let debug_loclists = DebugLocLists::from(EndianSlice::new(&section, LittleEndian));
+            let locations = LocationLists::new(debug_loc, debug_loclists);
+
+            let base = DebugLocListsBase((&first - &zero) as usize);
+            assert_eq!(
+                locations.get_offset(encoding, base, DebugLocListsIndex(0)),
+                Ok(LocationListsOffset(base.0 + 1000))
+            );
+            assert_eq!(
+                locations.get_offset(encoding, base, DebugLocListsIndex(19)),
+                Ok(LocationListsOffset(base.0 + 1019))
+            );
+        }
+    }
+
+    #[test]
+    fn test_loclists_gnu_v4_split_dwarf() {
+        #[rustfmt::skip]
+        let buf = [
+            0x03, // DW_LLE_startx_length
+            0x00, // ULEB encoded b7
+            0x08, 0x00, 0x00, 0x00, // Fixed 4 byte length of 8
+            0x03, 0x00, // Fixed two byte length of the location
+            0x11, 0x00, // DW_OP_constu 0
+            0x9f, // DW_OP_stack_value
+            // Padding data
+            //0x99, 0x99, 0x99, 0x99
+        ];
+        let data_buf = [0x11, 0x00, 0x9f];
+        let expected_data = EndianSlice::new(&data_buf, LittleEndian);
+        let debug_loc = DebugLoc::new(&buf, LittleEndian);
+        let debug_loclists = DebugLocLists::new(&[], LittleEndian);
+        let loclists = LocationLists::new(debug_loc, debug_loclists);
+        let debug_addr =
+            &DebugAddr::from(EndianSlice::new(&[0x01, 0x02, 0x03, 0x04], LittleEndian));
+        let debug_addr_base = DebugAddrBase(0);
+        let encoding = Encoding {
+            format: Format::Dwarf32,
+            version: 4,
+            address_size: 4,
+        };
+
+        // An invalid location range.
+        let mut locations = loclists
+            .locations_dwo(
+                LocationListsOffset(0x0),
+                encoding,
+                0,
+                debug_addr,
+                debug_addr_base,
+            )
+            .unwrap();
+        assert_eq!(
+            locations.next(),
+            Ok(Some(LocationListEntry {
+                range: Range {
+                    begin: 0x0403_0201,
+                    end: 0x0403_0209
+                },
+                data: Expression(expected_data),
+            }))
+        );
+    }
+}