Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / elf_common.h
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1/*-
2 * Copyright (c) 1998 John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/sys/elf_common.h,v 1.5.2.3 2001/02/28 02:30:46 obrien Exp $
1de703da 27 * $DragonFly: src/sys/sys/elf_common.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
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28 */
29
30#ifndef _SYS_ELF_COMMON_H_
31#define _SYS_ELF_COMMON_H_ 1
32
33/*
34 * ELF definitions that are independent of architecture or word size.
35 */
36
37/*
38 * Note header. The ".note" section contains an array of notes. Each
39 * begins with this header, aligned to a word boundary. Immediately
40 * following the note header is n_namesz bytes of name, padded to the
41 * next word boundary. Then comes n_descsz bytes of descriptor, again
42 * padded to a word boundary. The values of n_namesz and n_descsz do
43 * not include the padding.
44 */
45
46typedef struct {
47 u_int32_t n_namesz; /* Length of name. */
48 u_int32_t n_descsz; /* Length of descriptor. */
49 u_int32_t n_type; /* Type of this note. */
50} Elf_Note;
51
52/* Indexes into the e_ident array. Keep synced with
53 http://www.sco.com/developer/gabi/ch4.eheader.html */
54#define EI_MAG0 0 /* Magic number, byte 0. */
55#define EI_MAG1 1 /* Magic number, byte 1. */
56#define EI_MAG2 2 /* Magic number, byte 2. */
57#define EI_MAG3 3 /* Magic number, byte 3. */
58#define EI_CLASS 4 /* Class of machine. */
59#define EI_DATA 5 /* Data format. */
60#define EI_VERSION 6 /* ELF format version. */
61#define EI_OSABI 7 /* Operating system / ABI identification */
62#define EI_ABIVERSION 8 /* ABI version */
63#define OLD_EI_BRAND 8 /* Start of architecture identification. */
64#define EI_PAD 9 /* Start of padding (per SVR4 ABI). */
65#define EI_NIDENT 16 /* Size of e_ident array. */
66
67/* Values for the magic number bytes. */
68#define ELFMAG0 0x7f
69#define ELFMAG1 'E'
70#define ELFMAG2 'L'
71#define ELFMAG3 'F'
72
73/* Values for e_ident[EI_VERSION] and e_version. */
74#define EV_NONE 0
75#define EV_CURRENT 1
76
77/* Values for e_ident[EI_CLASS]. */
78#define ELFCLASSNONE 0 /* Unknown class. */
79#define ELFCLASS32 1 /* 32-bit architecture. */
80#define ELFCLASS64 2 /* 64-bit architecture. */
81
82/* Values for e_ident[EI_DATA]. */
83#define ELFDATANONE 0 /* Unknown data format. */
84#define ELFDATA2LSB 1 /* 2's complement little-endian. */
85#define ELFDATA2MSB 2 /* 2's complement big-endian. */
86
87/* Values for e_ident[EI_OSABI]. */
88#define ELFOSABI_SYSV 0 /* UNIX System V ABI */
89#define ELFOSABI_NONE ELFOSABI_SYSV /* symbol used in old spec */
90#define ELFOSABI_HPUX 1 /* HP-UX operating system */
91#define ELFOSABI_NETBSD 2 /* NetBSD */
92#define ELFOSABI_LINUX 3 /* GNU/Linux */
93#define ELFOSABI_HURD 4 /* GNU/Hurd */
94#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
95#define ELFOSABI_SOLARIS 6 /* Solaris */
96#define ELFOSABI_MONTEREY 7 /* Monterey */
97#define ELFOSABI_IRIX 8 /* IRIX */
98#define ELFOSABI_FREEBSD 9 /* FreeBSD */
99#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
100#define ELFOSABI_MODESTO 11 /* Novell Modesto */
101#define ELFOSABI_OPENBSD 12 /* OpenBSD */
102#define ELFOSABI_ARM 97 /* ARM */
103#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
104
105/* e_ident */
106#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
107 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
108 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
109 (ehdr).e_ident[EI_MAG3] == ELFMAG3)
110
111/* Values for e_type. */
112#define ET_NONE 0 /* Unknown type. */
113#define ET_REL 1 /* Relocatable. */
114#define ET_EXEC 2 /* Executable. */
115#define ET_DYN 3 /* Shared object. */
116#define ET_CORE 4 /* Core file. */
117
118/* Values for e_machine. */
119#define EM_NONE 0 /* Unknown machine. */
120#define EM_M32 1 /* AT&T WE32100. */
121#define EM_SPARC 2 /* Sun SPARC. */
122#define EM_386 3 /* Intel i386. */
123#define EM_68K 4 /* Motorola 68000. */
124#define EM_88K 5 /* Motorola 88000. */
125#define EM_486 6 /* Intel i486. */
126#define EM_860 7 /* Intel i860. */
127#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */
128
129/* Extensions. This list is not complete. */
130#define EM_S370 9 /* IBM System/370 */
131#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ /* Depreciated */
132#define EM_PARISC 15 /* HPPA */
133#define EM_SPARC32PLUS 18 /* SPARC v8plus */
134#define EM_PPC 20 /* PowerPC 32-bit */
135#define EM_PPC64 21 /* PowerPC 64-bit */
136#define EM_ARM 40 /* ARM */
137#define EM_SPARCV9 43 /* SPARC v9 64-bit */
138#define EM_IA_64 50 /* Intel IA-46 Processor */
139#define EM_X86_64 62 /* Advanced Micro Devices x86-64 */
140#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI */
141
142/* Special section indexes. */
143#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
144#define SHN_LORESERVE 0xff00 /* First of reserved range. */
145#define SHN_LOPROC 0xff00 /* First processor-specific. */
146#define SHN_HIPROC 0xff1f /* Last processor-specific. */
147#define SHN_ABS 0xfff1 /* Absolute values. */
148#define SHN_COMMON 0xfff2 /* Common data. */
149#define SHN_HIRESERVE 0xffff /* Last of reserved range. */
150
151/* sh_type */
152#define SHT_NULL 0 /* inactive */
153#define SHT_PROGBITS 1 /* program defined information */
154#define SHT_SYMTAB 2 /* symbol table section */
155#define SHT_STRTAB 3 /* string table section */
156#define SHT_RELA 4 /* relocation section with addends*/
157#define SHT_HASH 5 /* symbol hash table section */
158#define SHT_DYNAMIC 6 /* dynamic section */
159#define SHT_NOTE 7 /* note section */
160#define SHT_NOBITS 8 /* no space section */
161#define SHT_REL 9 /* relation section without addends */
162#define SHT_SHLIB 10 /* reserved - purpose unknown */
163#define SHT_DYNSYM 11 /* dynamic symbol table section */
164#define SHT_LOPROC 0x70000000 /* reserved range for processor */
165#define SHT_HIPROC 0x7fffffff /* specific section header types */
166#define SHT_LOUSER 0x80000000 /* reserved range for application */
167#define SHT_HIUSER 0xffffffff /* specific indexes */
168
169/* Flags for sh_flags. */
170#define SHF_WRITE 0x1 /* Section contains writable data. */
171#define SHF_ALLOC 0x2 /* Section occupies memory. */
172#define SHF_EXECINSTR 0x4 /* Section contains instructions. */
173#define SHF_MASKPROC 0xf0000000 /* Reserved for processor-specific. */
174
175/* Values for p_type. */
176#define PT_NULL 0 /* Unused entry. */
177#define PT_LOAD 1 /* Loadable segment. */
178#define PT_DYNAMIC 2 /* Dynamic linking information segment. */
179#define PT_INTERP 3 /* Pathname of interpreter. */
180#define PT_NOTE 4 /* Auxiliary information. */
181#define PT_SHLIB 5 /* Reserved (not used). */
182#define PT_PHDR 6 /* Location of program header itself. */
183
184#define PT_COUNT 7 /* Number of defined p_type values. */
185
186#define PT_LOPROC 0x70000000 /* First processor-specific type. */
187#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
188
189/* Values for p_flags. */
190#define PF_X 0x1 /* Executable. */
191#define PF_W 0x2 /* Writable. */
192#define PF_R 0x4 /* Readable. */
193
194/* Values for d_tag. */
195#define DT_NULL 0 /* Terminating entry. */
196#define DT_NEEDED 1 /* String table offset of a needed shared
197 library. */
198#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
199#define DT_PLTGOT 3 /* Processor-dependent address. */
200#define DT_HASH 4 /* Address of symbol hash table. */
201#define DT_STRTAB 5 /* Address of string table. */
202#define DT_SYMTAB 6 /* Address of symbol table. */
203#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
204#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
205#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
206#define DT_STRSZ 10 /* Size of string table. */
207#define DT_SYMENT 11 /* Size of each symbol table entry. */
208#define DT_INIT 12 /* Address of initialization function. */
209#define DT_FINI 13 /* Address of finalization function. */
210#define DT_SONAME 14 /* String table offset of shared object
211 name. */
212#define DT_RPATH 15 /* String table offset of library path. */
213#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. */
214#define DT_REL 17 /* Address of ElfNN_Rel relocations. */
215#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
216#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
217#define DT_PLTREL 20 /* Type of relocation used for PLT. */
218#define DT_DEBUG 21 /* Reserved (not used). */
219#define DT_TEXTREL 22 /* Indicates there may be relocations in
220 non-writable segments. */
221#define DT_JMPREL 23 /* Address of PLT relocations. */
222
223#define DT_COUNT 24 /* Number of defined d_tag values. */
224
225/* Values for n_type. Used in core files. */
226#define NT_PRSTATUS 1 /* Process status. */
227#define NT_FPREGSET 2 /* Floating point registers. */
228#define NT_PRPSINFO 3 /* Process state info. */
229
230/* Symbol Binding - ELFNN_ST_BIND - st_info */
231#define STB_LOCAL 0 /* Local symbol */
232#define STB_GLOBAL 1 /* Global symbol */
233#define STB_WEAK 2 /* like global - lower precedence */
234#define STB_LOPROC 13 /* reserved range for processor */
235#define STB_HIPROC 15 /* specific symbol bindings */
236
237/* Symbol type - ELFNN_ST_TYPE - st_info */
238#define STT_NOTYPE 0 /* Unspecified type. */
239#define STT_OBJECT 1 /* Data object. */
240#define STT_FUNC 2 /* Function. */
241#define STT_SECTION 3 /* Section. */
242#define STT_FILE 4 /* Source file. */
243#define STT_LOPROC 13 /* reserved range for processor */
244#define STT_HIPROC 15 /* specific symbol types */
245
246/* Special symbol table indexes. */
247#define STN_UNDEF 0 /* Undefined symbol index. */
248
249#endif /* !_SYS_ELF_COMMON_H_ */