diff options
Diffstat (limited to 'gold/output.h')
| -rw-r--r-- | gold/output.h | 119 |
1 files changed, 87 insertions, 32 deletions
diff --git a/gold/output.h b/gold/output.h index b6c1245..053579f 100644 --- a/gold/output.h +++ b/gold/output.h @@ -29,7 +29,6 @@ #include "elfcpp.h" #include "layout.h" #include "reloc-types.h" -#include "parameters.h" namespace gold { @@ -124,6 +123,11 @@ class Output_data layout_complete() { Output_data::sizes_are_fixed = true; } + // Used to check that layout has been done. + static bool + is_layout_complete() + { return Output_data::sizes_are_fixed; } + protected: // Functions that child classes may or in some cases must implement. @@ -179,9 +183,13 @@ class Output_data this->data_size_ = data_size; } - // Return default alignment for a size--32 or 64. + // Return default alignment for the target size. + static uint64_t + default_alignment(); + + // Return default alignment for a specified size--32 or 64. static uint64_t - default_alignment(int size); + default_alignment_for_size(int size); private: Output_data(const Output_data&); @@ -216,7 +224,7 @@ class Output_section_headers : public Output_data // Return the required alignment. uint64_t do_addralign() const - { return Output_data::default_alignment(parameters->get_size()); } + { return Output_data::default_alignment(); } private: // Write the data to the file with the right size and endianness. @@ -244,7 +252,7 @@ class Output_segment_headers : public Output_data // Return the required alignment. uint64_t do_addralign() const - { return Output_data::default_alignment(parameters->get_size()); } + { return Output_data::default_alignment(); } private: // Write the data to the file with the right size and endianness. @@ -276,7 +284,7 @@ class Output_file_header : public Output_data // Return the required alignment. uint64_t do_addralign() const - { return Output_data::default_alignment(parameters->get_size()); } + { return Output_data::default_alignment(); } // Set the address and offset--we only implement this for error // checking. @@ -330,17 +338,14 @@ class Output_section_data : public Output_data // Given an input OBJECT, an input section index SHNDX within that // object, and an OFFSET relative to the start of that input - // section, return whether or not the output address is known. - // OUTPUT_SECTION_ADDRESS is the address of the output section which - // this is a part of. If this function returns true, it sets - // *POUTPUT to the output address. + // section, return whether or not the corresponding offset within + // the output section is known. If this function returns true, it + // sets *POUTPUT to the output offset. The value -1 indicates that + // this input offset is being discarded. virtual bool - output_address(const Relobj* object, unsigned int shndx, off_t offset, - uint64_t output_section_address, uint64_t *poutput) const - { - return this->do_output_address(object, shndx, offset, - output_section_address, poutput); - } + output_offset(const Relobj* object, unsigned int shndx, off_t offset, + off_t *poutput) const + { return this->do_output_offset(object, shndx, offset, poutput); } protected: // The child class must implement do_write. @@ -357,10 +362,9 @@ class Output_section_data : public Output_data do_add_input_section(Relobj*, unsigned int) { gold_unreachable(); } - // The child class may implement output_address. + // The child class may implement output_offset. virtual bool - do_output_address(const Relobj*, unsigned int, off_t, uint64_t, - uint64_t*) const + do_output_offset(const Relobj*, unsigned int, off_t, off_t*) const { return false; } // Return the required alignment. @@ -736,7 +740,7 @@ class Output_data_reloc_base : public Output_section_data // Construct the section. Output_data_reloc_base() - : Output_section_data(Output_data::default_alignment(size)) + : Output_section_data(Output_data::default_alignment_for_size(size)) { } // Write out the data. @@ -901,7 +905,8 @@ class Output_data_got : public Output_section_data typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; Output_data_got() - : Output_section_data(Output_data::default_alignment(size)), entries_() + : Output_section_data(Output_data::default_alignment_for_size(size)), + entries_() { } // Add an entry for a global symbol to the GOT. Return true if this @@ -1013,8 +1018,7 @@ class Output_data_dynamic : public Output_section_data { public: Output_data_dynamic(Stringpool* pool) - : Output_section_data(Output_data::default_alignment( - parameters->get_size())), + : Output_section_data(Output_data::default_alignment()), entries_(), pool_(pool) { } @@ -1155,11 +1159,15 @@ class Output_section : public Output_data virtual ~Output_section(); // Add a new input section SHNDX, named NAME, with header SHDR, from - // object OBJECT. Return the offset within the output section. + // object OBJECT. RELOC_SHNDX is the index of a relocation section + // which applies to this section, or 0 if none, or -1U if more than + // one. Return the offset within the output section. template<int size, bool big_endian> off_t - add_input_section(Relobj* object, unsigned int shndx, const char *name, - const elfcpp::Shdr<size, big_endian>& shdr); + add_input_section(Sized_relobj<size, big_endian>* object, unsigned int shndx, + const char *name, + const elfcpp::Shdr<size, big_endian>& shdr, + unsigned int reloc_shndx); // Add generated data POSD to this output section. void @@ -1326,6 +1334,29 @@ class Output_section : public Output_data this->dynsym_index_ = index; } + // Return whether this section should be written after all the input + // sections are complete. + bool + after_input_sections() const + { return this->after_input_sections_; } + + // Record that this section should be written after all the input + // sections are complete. + void + set_after_input_sections() + { this->after_input_sections_ = true; } + + // Return whether the offset OFFSET in the input section SHNDX in + // object OBJECT is being included in the link. + bool + is_input_address_mapped(const Relobj* object, unsigned int shndx, + off_t offset) const; + + // Return the offset within the output section of OFFSET relative to + // the start of input section SHNDX in object OBJECT. + off_t + output_offset(const Relobj* object, unsigned int shndx, off_t offset) const; + // Return the output virtual address of OFFSET relative to the start // of input section SHNDX in object OBJECT. uint64_t @@ -1477,13 +1508,12 @@ class Output_section : public Output_data // Given an input OBJECT, an input section index SHNDX within that // object, and an OFFSET relative to the start of that input - // section, return whether or not the output address is known. - // OUTPUT_SECTION_ADDRESS is the address of the output section - // which this is a part of. If this function returns true, it - // sets *POUTPUT to the output address. + // section, return whether or not the output offset is known. If + // this function returns true, it sets *POUTPUT to the output + // offset. bool - output_address(const Relobj* object, unsigned int shndx, off_t offset, - uint64_t output_section_address, uint64_t *poutput) const; + output_offset(const Relobj* object, unsigned int shndx, off_t offset, + off_t *poutput) const; // Write out the data. This does nothing for an input section. void @@ -1648,6 +1678,9 @@ class Output_section : public Output_data // Whether the link field of this output section should point to the // dynamic symbol table. bool should_link_to_dynsym_ : 1; + // Whether this section should be written after all the input + // sections are complete. + bool after_input_sections_ : 1; }; // An output segment. PT_LOAD segments are built from collections of @@ -1847,6 +1880,28 @@ class Output_file write_output_view(off_t, off_t, unsigned char*) { } + // Get a read/write buffer. This is used when we want to write part + // of the file, read it in, and write it again. + unsigned char* + get_input_output_view(off_t start, off_t size) + { return this->get_output_view(start, size); } + + // Write a read/write buffer back to the file. + void + write_input_output_view(off_t, off_t, unsigned char*) + { } + + // Get a read buffer. This is used when we just want to read part + // of the file back it in. + const unsigned char* + get_input_view(off_t start, off_t size) + { return this->get_output_view(start, size); } + + // Release a read bfufer. + void + free_input_view(off_t, off_t, const unsigned char*) + { } + private: // General options. const General_options& options_; |