diff options
Diffstat (limited to 'bfd/bfd-in2.h')
| -rw-r--r-- | bfd/bfd-in2.h | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h index 2af3b74..96fab37 100644 --- a/bfd/bfd-in2.h +++ b/bfd/bfd-in2.h @@ -965,6 +965,9 @@ typedef struct sec else up the line will take care of it later. */ #define SEC_LINKER_CREATED 0x800000 + /* This section should not be subject to garbage collection. */ +#define SEC_KEEP 0x1000000 + /* End of section flags. */ /* Some internal packed boolean fields. */ @@ -978,6 +981,9 @@ typedef struct sec /* A mark flag used by some of the linker backends. */ unsigned int linker_mark : 1; + /* A mark flag used by some linker backends for garbage collection. */ + unsigned int gc_mark : 1; + /* End of internal packed boolean fields. */ /* The virtual memory address of the section - where it will be @@ -2129,6 +2135,26 @@ instruction. */ significant 8 bits of a 24 bit word are placed into the least significant 8 bits of the opcode. */ BFD_RELOC_TIC30_LDP, + +/* These two relocations are used by the linker to determine which of +the entries in a C++ virtual function table are actually used. When +the --gc-sections option is given, the linker will zero out the entries +that are not used, so that the code for those functions need not be +included in the output. + +VTABLE_INHERIT is a zero-space relocation used to describe to the +linker the inheritence tree of a C++ virtual function table. The +relocation's symbol should be the parent class' vtable, and the +relocation should be located at the child vtable. + +VTABLE_ENTRY is a zero-space relocation that describes the use of a +virtual function table entry. The reloc's symbol should refer to the +table of the class mentioned in the code. Off of that base, an offset +describes the entry that is being used. For Rela hosts, this offset +is stored in the reloc's addend. For Rel hosts, we are forced to put +this offset in the reloc's section offset. */ + BFD_RELOC_VTABLE_INHERIT, + BFD_RELOC_VTABLE_ENTRY, BFD_RELOC_UNUSED }; typedef enum bfd_reloc_code_real bfd_reloc_code_real_type; reloc_howto_type * @@ -2577,6 +2603,9 @@ bfd_set_private_flags PARAMS ((bfd *abfd, flagword flags)); #define bfd_relax_section(abfd, section, link_info, again) \ BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again)) +#define bfd_gc_sections(abfd, link_info) \ + BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info)) + #define bfd_link_hash_table_create(abfd) \ BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd)) @@ -2871,7 +2900,8 @@ CAT(NAME,_bfd_relax_section),\ CAT(NAME,_bfd_link_hash_table_create),\ CAT(NAME,_bfd_link_add_symbols),\ CAT(NAME,_bfd_final_link),\ -CAT(NAME,_bfd_link_split_section) +CAT(NAME,_bfd_link_split_section),\ +CAT(NAME,_bfd_gc_sections) int (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean)); bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, @@ -2895,7 +2925,10 @@ CAT(NAME,_bfd_link_split_section) /* Should this section be split up into smaller pieces during linking. */ boolean (*_bfd_link_split_section) PARAMS ((bfd *, struct sec *)); - /* Routines to handle dynamic symbols and relocs. */ + /* Remove sections that are not referenced from the output. */ + boolean (*_bfd_gc_sections) PARAMS ((bfd *, struct bfd_link_info *)); + + /* Routines to handle dynamic symbols and relocs. */ #define BFD_JUMP_TABLE_DYNAMIC(NAME)\ CAT(NAME,_get_dynamic_symtab_upper_bound),\ CAT(NAME,_canonicalize_dynamic_symtab),\ |