diff options
Diffstat (limited to 'gold/object.h')
| -rw-r--r-- | gold/object.h | 73 |
1 files changed, 72 insertions, 1 deletions
diff --git a/gold/object.h b/gold/object.h index e7d05c7..bbc1a10 100644 --- a/gold/object.h +++ b/gold/object.h @@ -195,7 +195,8 @@ class Object Object(const std::string& name, Input_file* input_file, bool is_dynamic, off_t offset = 0) : name_(name), input_file_(input_file), offset_(offset), shnum_(-1U), - is_dynamic_(is_dynamic), xindex_(NULL), no_export_(false) + is_dynamic_(is_dynamic), uses_split_stack_(false), + has_no_split_stack_(false), xindex_(NULL), no_export_(false) { input_file->file().add_object(); } virtual ~Object() @@ -216,6 +217,17 @@ class Object is_dynamic() const { return this->is_dynamic_; } + // Return whether this object was compiled with -fsplit-stack. + bool + uses_split_stack() const + { return this->uses_split_stack_; } + + // Return whether this object contains any functions compiled with + // the no_split_stack attribute. + bool + has_no_split_stack() const + { return this->has_no_split_stack_; } + // Returns NULL for Objects that are not plugin objects. This method // is overridden in the Pluginobj class. Pluginobj* @@ -556,6 +568,12 @@ class Object handle_gnu_warning_section(const char* name, unsigned int shndx, Symbol_table*); + // If NAME is the name of the special section which indicates that + // this object was compiled with -fstack-split, mark it accordingly, + // and return true. Otherwise return false. + bool + handle_split_stack_section(const char* name); + private: // This class may not be copied. Object(const Object&); @@ -572,6 +590,11 @@ class Object unsigned int shnum_; // Whether this is a dynamic object. bool is_dynamic_; + // Whether this object was compiled with -fsplit-stack. + bool uses_split_stack_; + // Whether this object contains any functions compiled with the + // no_split_stack attribute. + bool has_no_split_stack_; // Many sections for objects with more than SHN_LORESERVE sections. Xindex* xindex_; // True if exclude this object from automatic symbol export. @@ -1252,6 +1275,30 @@ class Got_offset_list Got_offset_list* got_next_; }; +// This type is used to modify relocations for -fsplit-stack. It is +// indexed by relocation index, and means that the relocation at that +// index should use the symbol from the vector, rather than the one +// indicated by the relocation. + +class Reloc_symbol_changes +{ + public: + Reloc_symbol_changes(size_t count) + : vec_(count, NULL) + { } + + void + set(size_t i, Symbol* sym) + { this->vec_[i] = sym; } + + const Symbol* + operator[](size_t i) const + { return this->vec_[i]; } + + private: + std::vector<Symbol*> vec_; +}; + // A regular object file. This is size and endian specific. template<int size, bool big_endian> @@ -1671,6 +1718,30 @@ class Sized_relobj : public Relobj unsigned char* reloc_view, section_size_type reloc_view_size); + // A type shared by split_stack_adjust_reltype and find_functions. + typedef std::map<section_offset_type, section_size_type> Function_offsets; + + // Check for -fsplit-stack routines calling non-split-stack routines. + void + split_stack_adjust(const Symbol_table*, const unsigned char* pshdrs, + unsigned int sh_type, unsigned int shndx, + const unsigned char* prelocs, size_t reloc_count, + unsigned char* view, section_size_type view_size, + Reloc_symbol_changes** reloc_map); + + template<int sh_type> + void + split_stack_adjust_reltype(const Symbol_table*, const unsigned char* pshdrs, + unsigned int shndx, const unsigned char* prelocs, + size_t reloc_count, unsigned char* view, + section_size_type view_size, + Reloc_symbol_changes** reloc_map); + + // Find all functions in a section. + void + find_functions(const unsigned char* pshdrs, unsigned int shndx, + Function_offsets*); + // Initialize input to output maps for section symbols in merged // sections. void |