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Finished layout code.

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This commit is contained in:
Ian Lance Taylor
2006-09-27 22:53:42 +00:00
parent 6b89cc2108
commit 75f65a3e30
12 changed files with 1281 additions and 407 deletions
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72
gold/target.h
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@@ -13,6 +13,8 @@
#ifndef GOLD_TARGET_H
#define GOLD_TARGET_H
#include <cassert>
#include "symtab.h"
#include "elfcpp.h"
@@ -33,43 +35,70 @@ class Target
// return 32 or 64.
int
get_size() const
{ return this->size_; }
{ return this->pti_->size; }
// Return whether this target is big-endian.
bool
is_big_endian() const
{ return this->is_big_endian_; }
{ return this->pti_->is_big_endian; }
// Whether this target has a specific make_symbol function.
bool
has_make_symbol() const
{ return this->has_make_symbol_; }
{ return this->pti_->has_make_symbol; }
// Whether this target has a specific resolve function.
bool
has_resolve() const
{ return this->has_resolve_; }
{ return this->pti_->has_resolve; }
// Return the default address to use for the text segment.
uint64_t
text_segment_address() const
{ return this->pti_->text_segment_address; }
// Return the ABI specified page size.
uint64_t
abi_pagesize() const
{ return this->pti_->abi_pagesize; }
// Return the common page size used on actual systems.
uint64_t
common_pagesize() const
{ return this->pti_->common_pagesize; }
protected:
Target(int size, bool is_big_endian, bool has_make_symbol, bool has_resolve)
: size_(size),
is_big_endian_(is_big_endian),
has_make_symbol_(has_make_symbol),
has_resolve_(has_resolve)
// This struct holds the constant information for a child class. We
// use a struct to avoid the overhead of virtual function calls for
// simple information.
struct Target_info
{
// Address size (32 or 64).
int size;
// Whether the target is big endian.
bool is_big_endian;
// Whether this target has a specific make_symbol function.
bool has_make_symbol;
// Whether this target has a specific resolve function.
bool has_resolve;
// The default text segment address.
uint64_t text_segment_address;
// The ABI specified page size.
uint64_t abi_pagesize;
// The common page size used by actual implementations.
uint64_t common_pagesize;
};
Target(const Target_info* pti)
: pti_(pti)
{ }
private:
Target(const Target&);
Target& operator=(const Target&);
// The target size.
int size_;
// Whether this target is big endian.
bool is_big_endian_;
// Whether this target has a special make_symbol function.
bool has_make_symbol_;
// Whether this target has a special resolve function.
bool has_resolve_;
// The target information.
const Target_info* pti_;
};
// The abstract class for a specific size and endianness of target.
@@ -96,9 +125,12 @@ class Sized_target : public Target
{ abort(); }
protected:
Sized_target(bool has_make_symbol, bool has_resolve)
: Target(size, big_endian, has_make_symbol, has_resolve)
{ }
Sized_target(const Target::Target_info* pti)
: Target(pti)
{
assert(pti->size == size);
assert(pti->is_big_endian ? big_endian : !big_endian);
}
};
} // End namespace gold.