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/*
Copyright (C) 2012 - 2015 Evan Teran
evan.teran@gmail.com
Copyright (C) 1995-2003,2004,2005,2006,2007,2008,2009,2010,2011
Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ELF_DYN_H_20121007_
#define ELF_DYN_H_20121007_
#include "elf_types.h"
/* Dynamic section entry. */
struct elf32_dyn {
elf32_sword d_tag; /* Dynamic entry type */
union {
elf32_word d_val; /* Integer value */
elf32_addr d_ptr; /* Address value */
} d_un;
};
struct elf64_dyn {
elf64_sxword d_tag; /* Dynamic entry type */
union {
elf64_xword d_val; /* Integer value */
elf64_addr d_ptr; /* Address value */
} d_un;
};
/* Legal values for d_tag field of Elf32_Dyn. */
enum {
DT_MIPS_RLD_VERSION = 0x70000001, /* Runtime linker interface version */
DT_MIPS_TIME_STAMP = 0x70000002, /* Timestamp */
DT_MIPS_ICHECKSUM = 0x70000003, /* Checksum */
DT_MIPS_IVERSION = 0x70000004, /* Version string (string tbl index) */
DT_MIPS_FLAGS = 0x70000005, /* Flags */
DT_MIPS_BASE_ADDRESS = 0x70000006, /* Base address */
DT_MIPS_MSYM = 0x70000007,
DT_MIPS_CONFLICT = 0x70000008, /* Address of CONFLICT section */
DT_MIPS_LIBLIST = 0x70000009, /* Address of LIBLIST section */
DT_MIPS_LOCAL_GOTNO = 0x7000000a, /* Number of local GOT entries */
DT_MIPS_CONFLICTNO = 0x7000000b, /* Number of CONFLICT entries */
DT_MIPS_LIBLISTNO = 0x70000010, /* Number of LIBLIST entries */
DT_MIPS_SYMTABNO = 0x70000011, /* Number of DYNSYM entries */
DT_MIPS_UNREFEXTNO = 0x70000012, /* First external DYNSYM */
DT_MIPS_GOTSYM = 0x70000013, /* First GOT entry in DYNSYM */
DT_MIPS_HIPAGENO = 0x70000014, /* Number of GOT page table entries */
DT_MIPS_RLD_MAP = 0x70000016, /* Address of run time loader map. */
DT_MIPS_DELTA_CLASS = 0x70000017, /* Delta C++ class definition. */
DT_MIPS_DELTA_CLASS_NO = 0x70000018, /* Number of entries in DT_MIPS_DELTA_CLASS. */
DT_MIPS_DELTA_INSTANCE = 0x70000019, /* Delta C++ class instances. */
DT_MIPS_DELTA_INSTANCE_NO = 0x7000001a, /* Number of entries in DT_MIPS_DELTA_INSTANCE. */
DT_MIPS_DELTA_RELOC = 0x7000001b, /* Delta relocations. */
DT_MIPS_DELTA_RELOC_NO = 0x7000001c, /* Number of entries in DT_MIPS_DELTA_RELOC. */
DT_MIPS_DELTA_SYM = 0x7000001d, /* Delta symbols that Delta relocations refer to. */
DT_MIPS_DELTA_SYM_NO = 0x7000001e, /* Number of entries in DT_MIPS_DELTA_SYM. */
DT_MIPS_DELTA_CLASSSYM = 0x70000020, /* Delta symbols that hold the class declaration. */
DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, /* Number of entries in DT_MIPS_DELTA_CLASSSYM. */
DT_MIPS_CXX_FLAGS = 0x70000022, /* Flags indicating for C++ flavor. */
DT_MIPS_PIXIE_INIT = 0x70000023,
DT_MIPS_SYMBOL_LIB = 0x70000024,
DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025,
DT_MIPS_LOCAL_GOTIDX = 0x70000026,
DT_MIPS_HIDDEN_GOTIDX = 0x70000027,
DT_MIPS_PROTECTED_GOTIDX = 0x70000028,
DT_MIPS_OPTIONS = 0x70000029, /* Address of .options. */
DT_MIPS_INTERFACE = 0x7000002a, /* Address of .interface. */
DT_MIPS_DYNSTR_ALIGN = 0x7000002b,
DT_MIPS_INTERFACE_SIZE = 0x7000002c, /* Size of the .interface section. */
DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002d, /* Address of rld_text_rsolve function stored in GOT. */
DT_MIPS_PERF_SUFFIX = 0x7000002e, /* Default suffix of dso to be added by rld on dlopen() calls. */
DT_MIPS_COMPACT_SIZE = 0x7000002f, /* (O32)Size of compact rel section. */
DT_MIPS_GP_VALUE = 0x70000030, /* GP value for aux GOTs. */
DT_MIPS_AUX_DYNAMIC = 0x70000031, /* Address of aux .dynamic. */
/* The address of .got.plt in an executable using the new non-PIC ABI. */
DT_MIPS_PLTGOT = 0x70000032,
/* The base of the PLT in an executable using the new non-PIC ABI if that
PLT is writable. For a non-writable PLT, this is omitted or has a zero
value. */
DT_MIPS_RWPLT = 0x70000034,
DT_MIPS_NUM = 0x35,
};
/* Legal values for d_tag (dynamic entry type). */
enum {
DT_NULL = 0, /* Marks end of dynamic section */
DT_NEEDED = 1, /* Name of needed library */
DT_PLTRELSZ = 2, /* Size in bytes of PLT relocs */
DT_PLTGOT = 3, /* Processor defined value */
DT_HASH = 4, /* Address of symbol hash table */
DT_STRTAB = 5, /* Address of string table */
DT_SYMTAB = 6, /* Address of symbol table */
DT_RELA = 7, /* Address of Rela relocs */
DT_RELASZ = 8, /* Total size of Rela relocs */
DT_RELAENT = 9, /* Size of one Rela reloc */
DT_STRSZ = 10, /* Size of string table */
DT_SYMENT = 11, /* Size of one symbol table entry */
DT_INIT = 12, /* Address of init function */
DT_FINI = 13, /* Address of termination function */
DT_SONAME = 14, /* Name of shared object */
DT_RPATH = 15, /* Library search path (deprecated) */
DT_SYMBOLIC = 16, /* Start symbol search here */
DT_REL = 17, /* Address of Rel relocs */
DT_RELSZ = 18, /* Total size of Rel relocs */
DT_RELENT = 19, /* Size of one Rel reloc */
DT_PLTREL = 20, /* Type of reloc in PLT */
DT_DEBUG = 21, /* For debugging; unspecified */
DT_TEXTREL = 22, /* Reloc might modify .text */
DT_JMPREL = 23, /* Address of PLT relocs */
DT_BIND_NOW = 24, /* Process relocations of object */
DT_INIT_ARRAY = 25, /* Array with addresses of init fct */
DT_FINI_ARRAY = 26, /* Array with addresses of fini fct */
DT_INIT_ARRAYSZ = 27, /* Size in bytes of DT_INIT_ARRAY */
DT_FINI_ARRAYSZ = 28, /* Size in bytes of DT_FINI_ARRAY */
DT_RUNPATH = 29, /* Library search path */
DT_FLAGS = 30, /* Flags for the object being loaded */
DT_ENCODING = 32, /* Start of encoded range */
DT_PREINIT_ARRAY = 32, /* Array with addresses of preinit fct*/
DT_PREINIT_ARRAYSZ = 33, /* size in bytes of DT_PREINIT_ARRAY */
DT_NUM = 34, /* Number used */
DT_LOOS = 0x6000000d, /* Start of OS-specific */
DT_HIOS = 0x6ffff000, /* End of OS-specific */
DT_LOPROC = 0x70000000, /* Start of processor-specific */
DT_HIPROC = 0x7fffffff, /* End of processor-specific */
DT_PROCNUM = DT_MIPS_NUM /* Most used by any processor */
};
/* DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
Dyn.d_un.d_val field of the Elf*_Dyn structure. This follows Sun's
approach. */
enum {
DT_VALRNGLO = 0x6ffffd00,
DT_GNU_PRELINKED = 0x6ffffdf5, /* Prelinking timestamp */
DT_GNU_CONFLICTSZ = 0x6ffffdf6, /* Size of conflict section */
DT_GNU_LIBLISTSZ = 0x6ffffdf7, /* Size of library list */
DT_CHECKSUM = 0x6ffffdf8,
DT_PLTPADSZ = 0x6ffffdf9,
DT_MOVEENT = 0x6ffffdfa,
DT_MOVESZ = 0x6ffffdfb,
DT_FEATURE_1 = 0x6ffffdfc, /* Feature selection (DTF_*). */
DT_POSFLAG_1 = 0x6ffffdfd, /* Flags for DT_* entries, effecting the following DT_* entry. */
DT_SYMINSZ = 0x6ffffdfe, /* Size of syminfo table (in bytes) */
DT_SYMINENT = 0x6ffffdff, /* Entry size of syminfo */
DT_VALRNGHI = 0x6ffffdff,
DT_VALNUM = 12,
};
constexpr inline uint32_t DT_VALTAGIDX(uint32_t tag) {
return DT_VALRNGHI - tag; /* Reverse order! */
}
/* DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
If any adjustment is made to the ELF object after it has been
built these entries will need to be adjusted. */
enum {
DT_ADDRRNGLO = 0x6ffffe00,
DT_GNU_HASH = 0x6ffffef5, /* GNU-style hash table. */
DT_TLSDESC_PLT = 0x6ffffef6,
DT_TLSDESC_GOT = 0x6ffffef7,
DT_GNU_CONFLICT = 0x6ffffef8, /* Start of conflict section */
DT_GNU_LIBLIST = 0x6ffffef9, /* Library list */
DT_CONFIG = 0x6ffffefa, /* Configuration information. */
DT_DEPAUDIT = 0x6ffffefb, /* Dependency auditing. */
DT_AUDIT = 0x6ffffefc, /* Object auditing. */
DT_PLTPAD = 0x6ffffefd, /* PLT padding. */
DT_MOVETAB = 0x6ffffefe, /* Move table. */
DT_SYMINFO = 0x6ffffeff, /* Syminfo table. */
DT_ADDRRNGHI = 0x6ffffeff,
DT_ADDRNUM = 11,
};
constexpr inline uint32_t DT_ADDRTAGIDX(uint32_t tag) {
return DT_ADDRRNGHI - tag; /* Reverse order! */
}
/* The versioning entry types. The next are defined as part of the
GNU extension. */
enum {
DT_VERSYM = 0x6ffffff0,
};
enum {
DT_RELACOUNT = 0x6ffffff9,
DT_RELCOUNT = 0x6ffffffa,
};
/* These were chosen by Sun. */
enum {
DT_FLAGS_1 = 0x6ffffffb, /* State flags, see DF_1_* below. */
DT_VERDEF = 0x6ffffffc, /* Address of version definition table */
DT_VERDEFNUM = 0x6ffffffd, /* Number of version definitions */
DT_VERNEED = 0x6ffffffe, /* Address of table with needed versions */
DT_VERNEEDNUM = 0x6fffffff, /* Number of needed versions */
DT_VERSIONTAGNUM = 16,
};
constexpr inline uint32_t DT_VERSIONTAGIDX(uint32_t tag) {
return DT_VERNEEDNUM - tag; /* Reverse order! */
}
/* Sun added these machine-independent extensions in the "processor-specific"
range. Be compatible. */
enum {
DT_AUXILIARY = 0x7ffffffd, /* Shared object to load before self */
DT_FILTER = 0x7fffffff, /* Shared object to get values from */
DT_EXTRANUM = 3,
};
constexpr inline uint32_t DT_EXTRATAGIDX(uint32_t tag) {
return static_cast<elf32_word>(-(static_cast<elf32_sword>(tag) << 1 >> 1) - 1);
}
/* Values of `d_un.d_val' in the DT_FLAGS entry. */
enum {
DF_ORIGIN = 0x00000001, /* Object may use DF_ORIGIN */
DF_SYMBOLIC = 0x00000002, /* Symbol resolutions starts here */
DF_TEXTREL = 0x00000004, /* Object contains text relocations */
DF_BIND_NOW = 0x00000008, /* No lazy binding for this object */
DF_STATIC_TLS = 0x00000010, /* Module uses the static TLS model */
};
/* State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1
entry in the dynamic section. */
enum {
DF_1_NOW = 0x00000001, /* Set RTLD_NOW for this object. */
DF_1_GLOBAL = 0x00000002, /* Set RTLD_GLOBAL for this object. */
DF_1_GROUP = 0x00000004, /* Set RTLD_GROUP for this object. */
DF_1_NODELETE = 0x00000008, /* Set RTLD_NODELETE for this object.*/
DF_1_LOADFLTR = 0x00000010, /* Trigger filtee loading at runtime.*/
DF_1_INITFIRST = 0x00000020, /* Set RTLD_INITFIRST for this object*/
DF_1_NOOPEN = 0x00000040, /* Set RTLD_NOOPEN for this object. */
DF_1_ORIGIN = 0x00000080, /* $ORIGIN must be handled. */
DF_1_DIRECT = 0x00000100, /* Direct binding enabled. */
DF_1_TRANS = 0x00000200,
DF_1_INTERPOSE = 0x00000400, /* Object is used to interpose. */
DF_1_NODEFLIB = 0x00000800, /* Ignore default lib search path. */
DF_1_NODUMP = 0x00001000, /* Object can't be dldump'ed. */
DF_1_CONFALT = 0x00002000, /* Configuration alternative created.*/
DF_1_ENDFILTEE = 0x00004000, /* Filtee terminates filters search. */
DF_1_DISPRELDNE = 0x00008000, /* Disp reloc applied at build time. */
DF_1_DISPRELPND = 0x00010000, /* Disp reloc applied at run-time. */
};
/* Flags for the feature selection in DT_FEATURE_1. */
enum {
DTF_1_PARINIT = 0x00000001,
DTF_1_CONFEXP = 0x00000002,
};
/* Flags in the DT_POSFLAG_1 entry effecting only the next DT_* entry. */
enum {
DF_P1_LAZYLOAD = 0x00000001, /* Lazyload following object. */
DF_P1_GROUPPERM = 0x00000002, /* Symbols from next object are not generally available. */
};
#endif
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