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+%% -*- 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-64 formated object file, such as sizes,
+%%% offsets and predefined constants. For further information about
+%%% each field take a quick look at
+%%% "[http://downloads.openwatcom.org/ftp/devel/docs/elf-64-gen.pdf]"
+%%% that contain the current HP/Intel definition of the ELF object
+%%% file format.
+
+%%------------------------------------------------------------------------------
+%% ELF-64 Data Types (in bytes)
+%%------------------------------------------------------------------------------
+-define(ELF_ADDR_SIZE, 8).
+-define(ELF_OFF_SIZE, 8).
+-define(ELF_HALF_SIZE, 2).
+-define(ELF_WORD_SIZE, 4).
+-define(ELF_SWORD_SIZE, 4).
+-define(ELF_XWORD_SIZE, 8).
+-define(ELF_SXWORD_SIZE, 8).
+-define(ELF_UNSIGNED_CHAR_SIZE, 1).
+
+%%------------------------------------------------------------------------------
+%% ELF-64 Symbol Table Entries
+%%------------------------------------------------------------------------------
+%% Precomputed offset for Symbol Table entries in SymTab binary
+-define(ST_NAME_OFFSET, 0).
+-define(ST_INFO_OFFSET, (?ST_NAME_OFFSET + ?ST_NAME_SIZE) ).
+-define(ST_OTHER_OFFSET, (?ST_INFO_OFFSET + ?ST_INFO_SIZE) ).
+-define(ST_SHNDX_OFFSET, (?ST_OTHER_OFFSET + ?ST_OTHER_SIZE) ).
+-define(ST_VALUE_OFFSET, (?ST_SHNDX_OFFSET + ?ST_SHNDX_SIZE) ).
+-define(ST_SIZE_OFFSET, (?ST_VALUE_OFFSET + ?ST_VALUE_SIZE) ).
+
+%%------------------------------------------------------------------------------
+%% ELF-64 Relocation Entries
+%%------------------------------------------------------------------------------
+%% Useful macros to extract information from r_info field
+-define(ELF_R_SYM(I), (I bsr 32) ).
+-define(ELF_R_TYPE(I), (I band 16#ffffffff) ).
+-define(ELF_R_INFO(S, T), ((S bsl 32) + (T band 16#ffffffff)) ).
+
+%%------------------------------------------------------------------------------
+%% ELF-64 Program Header Table
+%%------------------------------------------------------------------------------
+%% Offsets of various fields in a Program Header Table entry binary.
+-define(P_TYPE_OFFSET, 0).
+-define(P_FLAGS_OFFSET, (?P_TYPE_OFFSET + ?P_TYPE_SIZE) ).
+-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_ALIGN_OFFSET, (?P_MEMSZ_OFFSET + ?P_MEMSZ_SIZE) ).