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From Craig Silverstein: rework DWARF reader code a bit.

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This commit is contained in:
Ian Lance Taylor
2007-11-12 19:56:20 +00:00
parent 386c048c7a
commit 24badc6562
3 changed files with 88 additions and 78 deletions
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34
gold/dwarf_reader.h
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@ -29,6 +29,7 @@
#include "elfcpp.h"
#include "elfcpp_swap.h"
#include "dwarf.h"
#include "reloc.h"
namespace gold
{
@ -44,25 +45,8 @@ template<int size, bool big_endian>
class Dwarf_line_info
{
public:
// Initializes a .debug_line reader. Buffer and buffer length point
// to the beginning and length of the line information to read.
// Reader is a ByteReader class that has the endianness set
// properly.
Dwarf_line_info(const unsigned char* buffer, off_t buffer_length,
Track_relocs<size, big_endian>* track_relocs,
const unsigned char* symtab_buffer,
off_t symtab_buffer_length)
: data_valid_(true),
buffer_(buffer), buffer_end_(buffer + buffer_length),
track_relocs_(track_relocs),
symtab_buffer_(symtab_buffer),
symtab_buffer_end_(symtab_buffer + symtab_buffer_length),
directories_(1), files_(1)
{ }
// Start processing line info, and populates the offset_map_.
void
read_line_mappings();
// Initializes a .debug_line reader for a given object file.
Dwarf_line_info(Sized_relobj<size, big_endian>* object);
// Given a section number and an offset, returns the associated
// file and line-number, as a string: "file:lineno". If unable
@ -72,6 +56,10 @@ class Dwarf_line_info
addr2line(unsigned int shndx, off_t offset);
private:
// Start processing line info, and populates the offset_map_.
void
read_line_mappings();
// Reads the relocation section associated with .debug_line and
// stores relocation information in reloc_map_.
void
@ -128,14 +116,14 @@ class Dwarf_line_info
// buffer is the buffer for our line info, starting at exactly where
// the line info to read is.
const unsigned char* buffer_;
const unsigned char* const buffer_end_;
const unsigned char* buffer_end_;
// This has relocations that point into buffer.
Track_relocs<size, big_endian>* track_relocs_;
Track_relocs<size, big_endian> track_relocs_;
// This is used to figure out what section to apply a relocation to.
const unsigned char* const symtab_buffer_;
const unsigned char* const symtab_buffer_end_;
const unsigned char* symtab_buffer_;
const unsigned char* symtab_buffer_end_;
// Holds the directories and files as we see them.
std::vector<std::string> directories_;