diff options
Diffstat (limited to 'gold/layout.h')
| -rw-r--r-- | gold/layout.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/gold/layout.h b/gold/layout.h index fe5c696..94745a6 100644 --- a/gold/layout.h +++ b/gold/layout.h @@ -528,6 +528,31 @@ class Layout get_section_order_map() { return &this->section_order_map_; } + // Struct to store segment info when mapping some input sections to + // unique segments using linker plugins. Mapping an input section to + // a unique segment is done by first placing such input sections in + // unique output sections and then mapping the output section to a + // unique segment. NAME is the name of the output section. FLAGS + // and ALIGN are the extra flags and alignment of the segment. + struct Unique_segment_info + { + // Identifier for the segment. ELF segments dont have names. This + // is used as the name of the output section mapped to the segment. + const char* name; + // Additional segment flags. + uint64_t flags; + // Segment alignment. + uint64_t align; + }; + + // Mapping from input section to segment. + typedef std::map<Const_section_id, Unique_segment_info*> + Section_segment_map; + + // Maps section SECN to SEGMENT s. + void + insert_section_segment_map(Const_section_id secn, Unique_segment_info *s); + bool is_section_ordering_specified() { return this->section_ordering_specified_; } @@ -536,6 +561,14 @@ class Layout set_section_ordering_specified() { this->section_ordering_specified_ = true; } + bool + is_unique_segment_for_sections_specified() const + { return this->unique_segment_for_sections_specified_; } + + void + set_unique_segment_for_sections_specified() + { this->unique_segment_for_sections_specified_ = true; } + // For incremental updates, allocate a block of memory from the // free list. Find a block starting at or after MINOFF. off_t @@ -1070,6 +1103,11 @@ class Layout elfcpp::Elf_Word type, elfcpp::Elf_Xword flags, Output_section_order order, bool is_relro); + // Clear the input section flags that should not be copied to the + // output section. + elfcpp::Elf_Xword + get_output_section_flags (elfcpp::Elf_Xword input_section_flags); + // Choose the output section for NAME in RELOBJ. Output_section* choose_output_section(const Relobj* relobj, const char* name, @@ -1336,6 +1374,9 @@ class Layout // True if the input sections in the output sections should be sorted // as specified in a section ordering file. bool section_ordering_specified_; + // True if some input sections need to be mapped to a unique segment, + // after being mapped to a unique Output_section. + bool unique_segment_for_sections_specified_; // In incremental build, holds information check the inputs and build the // .gnu_incremental_inputs section. Incremental_inputs* incremental_inputs_; @@ -1350,6 +1391,11 @@ class Layout // Plugins specify section_ordering using this map. This is set in // update_section_order in plugin.cc std::map<Section_id, unsigned int> section_order_map_; + // This maps an input section to a unique segment. This is done by first + // placing such input sections in unique output sections and then mapping + // the output section to a unique segment. Unique_segment_info stores + // any additional flags and alignment of the new segment. + Section_segment_map section_segment_map_; // Hash a pattern to its position in the section ordering file. Unordered_map<std::string, unsigned int> input_section_position_; // Vector of glob only patterns in the section_ordering file. |