%% -*- erlang-indent-level: 2 -*-
%%% @copyright 2011-2014 Yiannis Tsiouris <[email protected]>,
%%% Chris Stavrakakis <[email protected]>
%%% @author Yiannis Tsiouris <[email protected]>
%%% [http://www.softlab.ntua.gr/~gtsiour/]
%%% @doc This header file contains very very useful macros for handling
%%% various segments of an ELF-32 formated object file, such as sizes,
%%% offsets and predefined constants. For further information about
%%% each field take a quick look at
%%% "[http://www.sco.com/developers/gabi/latest/contents.html]"
%%% that contain the current HP/Intel definition of the ELF object
%%% file format.
%%------------------------------------------------------------------------------
%% ELF-32 Data Types (in bytes)
%%------------------------------------------------------------------------------
-define(ELF_ADDR_SIZE, 4).
-define(ELF_OFF_SIZE, 4).
-define(ELF_HALF_SIZE, 2).
-define(ELF_WORD_SIZE, 4).
-define(ELF_SWORD_SIZE, 4).
-define(ELF_XWORD_SIZE, ?ELF_WORD_SIZE). % for compatibility
-define(ELF_SXWORD_SIZE, ?ELF_WORD_SIZE).
-define(ELF_UNSIGNED_CHAR_SIZE, 1).
%%------------------------------------------------------------------------------
%% ELF-32 Symbol Table Entries
%%------------------------------------------------------------------------------
%% Precomputed offset for Symbol Table entries in SymTab binary (needed because
%% of the different offsets in 32 and 64 bit formats).
-define(ST_NAME_OFFSET, 0).
-define(ST_VALUE_OFFSET, (?ST_NAME_OFFSET + ?ST_NAME_SIZE) ).
-define(ST_SIZE_OFFSET, (?ST_VALUE_OFFSET + ?ST_VALUE_SIZE) ).
-define(ST_INFO_OFFSET, (?ST_SIZE_OFFSET + ?ST_SIZE_SIZE) ).
-define(ST_OTHER_OFFSET, (?ST_INFO_OFFSET + ?ST_INFO_SIZE) ).
-define(ST_SHNDX_OFFSET, (?ST_OTHER_OFFSET + ?ST_OTHER_SIZE) ).
%%------------------------------------------------------------------------------
%% ELF-64 Relocation Entries
%%------------------------------------------------------------------------------
%% Useful macros to extract information from r_info field
-define(ELF_R_SYM(I), (I bsr 8) ).
-define(ELF_R_TYPE(I), (I band 16#ff) ).
-define(ELF_R_INFO(S, T), ((S bsl 8) + (T band 16#ff)) ).
%%------------------------------------------------------------------------------
%% ELF-64 Program Header Table
%%------------------------------------------------------------------------------
%% Offsets of various fields in a Program Header Table entry binary.
-define(P_TYPE_OFFSET, 0).
-define(P_OFFSET_OFFSET, (?P_FLAGS_OFFSET + ?P_FLAGS_SIZE) ).
-define(P_VADDR_OFFSET, (?P_OFFSET_OFFSET + ?P_OFFSET_SIZE) ).
-define(P_PADDR_OFFSET, (?P_VADDR_OFFSET + ?P_VADDR_SIZE) ).
-define(P_FILESZ_OFFSET, (?P_PVADDR_OFFSET + ?P_PVADDR_SIZE) ).
-define(P_MEMSZ_OFFSET, (?P_FILESZ_OFFSET + ?P_FILESZ_SIZE) ).
-define(P_FLAGS_OFFSET, (?P_TYPE_OFFSET + ?P_TYPE_SIZE) ).
-define(P_ALIGN_OFFSET, (?P_MEMSZ_OFFSET + ?P_MEMSZ_SIZE) ).
