FreeBSD/Linux Kernel Cross Reference
sys/mips/include/elf.h
1 /* $OpenBSD: elf_abi.h,v 1.1 1998/01/28 11:14:41 pefo Exp $ */
2
3 /*-
4 * Copyright (c) 1996 Per Fogelstrom
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed under OpenBSD by
17 * Per Fogelstrom.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * JNPR: elf.h,v 1.4 2006/12/02 09:53:40 katta
34 * $FreeBSD: releng/9.0/sys/mips/include/elf.h 217097 2011-01-07 14:22:34Z kib $
35 *
36 */
37
38 #ifndef _MACHINE_ELF_H_
39 #define _MACHINE_ELF_H_
40
41 /* Information taken from MIPS ABI supplemental */
42
43 #ifndef __ELF_WORD_SIZE
44 #if defined(__mips_n64)
45 #define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */
46 #else
47 #define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */
48 #endif
49 #endif
50 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
51 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */
52 #include <sys/elf_generic.h>
53
54 #define ELF_ARCH EM_MIPS
55 #define ELF_MACHINE_OK(x) ((x) == EM_MIPS || (x) == EM_MIPS_RS4_BE)
56
57 /* Architecture dependent Segment types - p_type */
58 #define PT_MIPS_REGINFO 0x70000000 /* Register usage information */
59
60 /* Architecture dependent d_tag field for Elf32_Dyn. */
61 #define DT_MIPS_RLD_VERSION 0x70000001 /* Runtime Linker Interface ID */
62 #define DT_MIPS_TIME_STAMP 0x70000002 /* Timestamp */
63 #define DT_MIPS_ICHECKSUM 0x70000003 /* Cksum of ext str and com sizes */
64 #define DT_MIPS_IVERSION 0x70000004 /* Version string (string tbl index) */
65 #define DT_MIPS_FLAGS 0x70000005 /* Flags */
66 #define DT_MIPS_BASE_ADDRESS 0x70000006 /* Segment base address */
67 #define DT_MIPS_CONFLICT 0x70000008 /* Adr of .conflict section */
68 #define DT_MIPS_LIBLIST 0x70000009 /* Address of .liblist section */
69 #define DT_MIPS_LOCAL_GOTNO 0x7000000a /* Number of local .GOT entries */
70 #define DT_MIPS_CONFLICTNO 0x7000000b /* Number of .conflict entries */
71 #define DT_MIPS_LIBLISTNO 0x70000010 /* Number of .liblist entries */
72 #define DT_MIPS_SYMTABNO 0x70000011 /* Number of .dynsym entries */
73 #define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */
74 #define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in .dynsym */
75 #define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */
76 #define DT_MIPS_RLD_MAP 0x70000016 /* Address of debug map pointer */
77
78 #define DT_PROCNUM (DT_MIPS_RLD_MAP - DT_LOPROC + 1)
79
80 /*
81 * Legal values for e_flags field of Elf32_Ehdr.
82 */
83 #define EF_MIPS_NOREORDER 1 /* .noreorder was used */
84 #define EF_MIPS_PIC 2 /* Contains PIC code */
85 #define EF_MIPS_CPIC 4 /* Uses PIC calling sequence */
86 #define EF_MIPS_ARCH 0xf0000000 /* MIPS architecture level */
87
88 /*
89 * Mips special sections.
90 */
91 #define SHN_MIPS_ACOMMON 0xff00 /* Allocated common symbols */
92 #define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */
93 #define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */
94
95 /*
96 * Legal values for sh_type field of Elf32_Shdr.
97 */
98 #define SHT_MIPS_LIBLIST 0x70000000 /* Shared objects used in link */
99 #define SHT_MIPS_CONFLICT 0x70000002 /* Conflicting symbols */
100 #define SHT_MIPS_GPTAB 0x70000003 /* Global data area sizes */
101 #define SHT_MIPS_UCODE 0x70000004 /* Reserved for SGI/MIPS compilers */
102 #define SHT_MIPS_DEBUG 0x70000005 /* MIPS ECOFF debugging information */
103 #define SHT_MIPS_REGINFO 0x70000006 /* Register usage information */
104
105 /*
106 * Legal values for sh_flags field of Elf32_Shdr.
107 */
108 #define SHF_MIPS_GPREL 0x10000000 /* Must be part of global data area */
109
110 /*
111 * Entries found in sections of type SHT_MIPS_GPTAB.
112 */
113 typedef union {
114 struct {
115 Elf32_Word gt_current_g_value; /* -G val used in compilation */
116 Elf32_Word gt_unused; /* Not used */
117 } gt_header; /* First entry in section */
118 struct {
119 Elf32_Word gt_g_value; /* If this val were used for -G */
120 Elf32_Word gt_bytes; /* This many bytes would be used */
121 } gt_entry; /* Subsequent entries in section */
122 } Elf32_gptab;
123 typedef union {
124 struct {
125 Elf64_Word gt_current_g_value; /* -G val used in compilation */
126 Elf64_Word gt_unused; /* Not used */
127 } gt_header; /* First entry in section */
128 struct {
129 Elf64_Word gt_g_value; /* If this val were used for -G */
130 Elf64_Word gt_bytes; /* This many bytes would be used */
131 } gt_entry; /* Subsequent entries in section */
132 } Elf64_gptab;
133
134 /*
135 * Entry found in sections of type SHT_MIPS_REGINFO.
136 */
137 typedef struct {
138 Elf32_Word ri_gprmask; /* General registers used */
139 Elf32_Word ri_cprmask[4]; /* Coprocessor registers used */
140 Elf32_Sword ri_gp_value; /* $gp register value */
141 } Elf32_RegInfo;
142 typedef struct {
143 Elf64_Word ri_gprmask; /* General registers used */
144 Elf64_Word ri_cprmask[4]; /* Coprocessor registers used */
145 Elf64_Sword ri_gp_value; /* $gp register value */
146 } Elf64_RegInfo;
147
148
149 /*
150 * Mips relocations.
151 */
152
153 #define R_MIPS_NONE 0 /* No reloc */
154 #define R_MIPS_16 1 /* Direct 16 bit */
155 #define R_MIPS_32 2 /* Direct 32 bit */
156 #define R_MIPS_REL32 3 /* PC relative 32 bit */
157 #define R_MIPS_26 4 /* Direct 26 bit shifted */
158 #define R_MIPS_HI16 5 /* High 16 bit */
159 #define R_MIPS_LO16 6 /* Low 16 bit */
160 #define R_MIPS_GPREL16 7 /* GP relative 16 bit */
161 #define R_MIPS_LITERAL 8 /* 16 bit literal entry */
162 #define R_MIPS_GOT16 9 /* 16 bit GOT entry */
163 #define R_MIPS_PC16 10 /* PC relative 16 bit */
164 #define R_MIPS_CALL16 11 /* 16 bit GOT entry for function */
165 #define R_MIPS_GPREL32 12 /* GP relative 32 bit */
166 #define R_MIPS_GOTHI16 21 /* GOT HI 16 bit */
167 #define R_MIPS_GOTLO16 22 /* GOT LO 16 bit */
168 #define R_MIPS_CALLHI16 30 /* upper 16 bit GOT entry for function */
169 #define R_MIPS_CALLLO16 31 /* lower 16 bit GOT entry for function */
170
171 /*
172 * These are from the 64-bit Irix ELF ABI
173 */
174 #define R_MIPS_SHIFT5 16
175 #define R_MIPS_SHIFT6 17
176 #define R_MIPS_64 18
177 #define R_MIPS_GOT_DISP 19
178 #define R_MIPS_GOT_PAGE 20
179 #define R_MIPS_GOT_OFST 21
180 #define R_MIPS_GOT_HI16 22
181 #define R_MIPS_GOT_LO16 23
182 #define R_MIPS_SUB 24
183 #define R_MIPS_INSERT_A 25
184 #define R_MIPS_INSERT_B 26
185 #define R_MIPS_DELETE 27
186 #define R_MIPS_HIGHER 28
187 #define R_MIPS_HIGHEST 29
188 #define R_MIPS_SCN_DISP 32
189 #define R_MIPS_REL16 33
190 #define R_MIPS_ADD_IMMEDIATE 34
191 #define R_MIPS_PJUMP 35
192 #define R_MIPS_ERLGOT 36
193
194 #define R_MIPS_max 37
195 #define R_TYPE(name) __CONCAT(R_MIPS_,name)
196
197 /* Define "machine" characteristics */
198 #if __ELF_WORD_SIZE == 32
199 #define ELF_TARG_CLASS ELFCLASS32
200 #else
201 #define ELF_TARG_CLASS ELFCLASS64
202 #endif
203 #ifdef __MIPSEB__
204 #define ELF_TARG_DATA ELFDATA2MSB
205 #else
206 #define ELF_TARG_DATA ELFDATA2LSB
207 #endif
208 #define ELF_TARG_MACH EM_MIPS
209 #define ELF_TARG_VER 1
210
211 /*
212 * Auxiliary vector entries for passing information to the interpreter.
213 *
214 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
215 * but POSIX lays claim to all symbols ending with "_t".
216 */
217 typedef struct { /* Auxiliary vector entry on initial stack */
218 int a_type; /* Entry type. */
219 union {
220 int a_val; /* Integer value. */
221 void *a_ptr; /* Address. */
222 void (*a_fcn)(void); /* Function pointer (not used). */
223 } a_un;
224 } Elf32_Auxinfo;
225
226 typedef struct { /* Auxiliary vector entry on initial stack */
227 long a_type; /* Entry type. */
228 union {
229 long a_val; /* Integer value. */
230 void *a_ptr; /* Address. */
231 void (*a_fcn)(void); /* Function pointer (not used). */
232 } a_un;
233 } Elf64_Auxinfo;
234
235 __ElfType(Auxinfo);
236
237 /* Values for a_type. */
238 #define AT_NULL 0 /* Terminates the vector. */
239 #define AT_IGNORE 1 /* Ignored entry. */
240 #define AT_EXECFD 2 /* File descriptor of program to load. */
241 #define AT_PHDR 3 /* Program header of program already loaded. */
242 #define AT_PHENT 4 /* Size of each program header entry. */
243 #define AT_PHNUM 5 /* Number of program header entries. */
244 #define AT_PAGESZ 6 /* Page size in bytes. */
245 #define AT_BASE 7 /* Interpreter's base address. */
246 #define AT_FLAGS 8 /* Flags (unused for i386). */
247 #define AT_ENTRY 9 /* Where interpreter should transfer control. */
248 #define AT_NOTELF 10 /* Program is not ELF ?? */
249 #define AT_UID 11 /* Real uid. */
250 #define AT_EUID 12 /* Effective uid. */
251 #define AT_GID 13 /* Real gid. */
252 #define AT_EGID 14 /* Effective gid. */
253 #define AT_EXECPATH 15 /* Path to the executable. */
254 #define AT_CANARY 16 /* Canary for SSP */
255 #define AT_CANARYLEN 17 /* Length of the canary. */
256 #define AT_OSRELDATE 18 /* OSRELDATE. */
257 #define AT_NCPUS 19 /* Number of CPUs. */
258 #define AT_PAGESIZES 20 /* Pagesizes. */
259 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */
260 #define AT_STACKPROT 23 /* Initial stack protection. */
261
262 #define AT_COUNT 24 /* Count of defined aux entry types. */
263
264 #define ET_DYN_LOAD_ADDR 0x0120000
265
266 /*
267 * Constant to mark start of symtab/strtab saved by trampoline
268 */
269 #define SYMTAB_MAGIC 0x64656267
270
271 #endif /* !_MACHINE_ELF_H_ */
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