1/* $NetBSD: elf_machdep.h,v 1.21 2025/04/16 01:56:52 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef _MIPS_ELF_MACHDEP_H_
29#define _MIPS_ELF_MACHDEP_H_
30
31#ifdef _LP64
32#define KERN_ELFSIZE 64
33#define ARCH_ELFSIZE 64 /* MD native binary size */
34#else
35#define KERN_ELFSIZE 32
36#define ARCH_ELFSIZE 32 /* MD native binary size */
37#endif
38
39#if ELFSIZE == 32
40#define ELF32_MACHDEP_ID_CASES \
41 case EM_MIPS: \
42 break;
43
44#define ELF32_MACHDEP_ID EM_MIPS
45#elif ELFSIZE == 64
46#define ELF64_MACHDEP_ID_CASES \
47 case EM_MIPS: \
48 break;
49
50#define ELF64_MACHDEP_ID EM_MIPS
51#endif
52
53/* mips relocs. */
54
55#define R_MIPS_NONE 0
56#define R_MIPS_16 1
57#define R_MIPS_32 2
58#define R_MIPS_REL32 3
59#define R_MIPS_REL R_MIPS_REL32
60#define R_MIPS_26 4
61#define R_MIPS_HI16 5 /* high 16 bits of symbol value */
62#define R_MIPS_LO16 6 /* low 16 bits of symbol value */
63#define R_MIPS_GPREL16 7 /* GP-relative reference */
64#define R_MIPS_LITERAL 8 /* Reference to literal section */
65#define R_MIPS_GOT16 9 /* Reference to global offset table */
66#define R_MIPS_GOT R_MIPS_GOT16
67#define R_MIPS_PC16 10 /* 16 bit PC relative reference */
68#define R_MIPS_CALL16 11 /* 16 bit call thru glbl offset tbl */
69#define R_MIPS_CALL R_MIPS_CALL16
70#define R_MIPS_GPREL32 12
71
72/* 13, 14, 15 are not defined at this point. */
73#define R_MIPS_UNUSED1 13
74#define R_MIPS_UNUSED2 14
75#define R_MIPS_UNUSED3 15
76
77/*
78 * The remaining relocs are apparently part of the 64-bit Irix ELF ABI.
79 */
80#define R_MIPS_SHIFT5 16
81#define R_MIPS_SHIFT6 17
82
83#define R_MIPS_64 18
84#define R_MIPS_GOT_DISP 19
85#define R_MIPS_GOT_PAGE 20
86#define R_MIPS_GOT_OFST 21
87#define R_MIPS_GOT_HI16 22
88#define R_MIPS_GOT_LO16 23
89#define R_MIPS_SUB 24
90#define R_MIPS_INSERT_A 25
91#define R_MIPS_INSERT_B 26
92#define R_MIPS_DELETE 27
93#define R_MIPS_HIGHER 28
94#define R_MIPS_HIGHEST 29
95#define R_MIPS_CALL_HI16 30
96#define R_MIPS_CALL_LO16 31
97#define R_MIPS_SCN_DISP 32
98#define R_MIPS_REL16 33
99#define R_MIPS_ADD_IMMEDIATE 34
100#define R_MIPS_PJUMP 35
101#define R_MIPS_RELGOT 36
102#define R_MIPS_JALR 37
103/* TLS relocations */
104
105#define R_MIPS_TLS_DTPMOD32 38 /* Module number 32 bit */
106#define R_MIPS_TLS_DTPREL32 39 /* Module-relative offset 32 bit */
107#define R_MIPS_TLS_DTPMOD64 40 /* Module number 64 bit */
108#define R_MIPS_TLS_DTPREL64 41 /* Module-relative offset 64 bit */
109#define R_MIPS_TLS_GD 42 /* 16 bit GOT offset for GD */
110#define R_MIPS_TLS_LDM 43 /* 16 bit GOT offset for LDM */
111#define R_MIPS_TLS_DTPREL_HI16 44 /* Module-relative offset, high 16 bits */
112#define R_MIPS_TLS_DTPREL_LO16 45 /* Module-relative offset, low 16 bits */
113#define R_MIPS_TLS_GOTTPREL 46 /* 16 bit GOT offset for IE */
114#define R_MIPS_TLS_TPREL32 47 /* TP-relative offset, 32 bit */
115#define R_MIPS_TLS_TPREL64 48 /* TP-relative offset, 64 bit */
116#define R_MIPS_TLS_TPREL_HI16 49 /* TP-relative offset, high 16 bits */
117#define R_MIPS_TLS_TPREL_LO16 50 /* TP-relative offset, low 16 bits */
118
119#define R_MIPS_max 51
120
121#define R_TYPE(name) __CONCAT(R_MIPS_,name)
122
123#define R_MIPS16_min 100
124#define R_MIPS16_26 100
125#define R_MIPS16_GPREL 101
126#define R_MIPS16_GOT16 102
127#define R_MIPS16_CALL16 103
128#define R_MIPS16_HI16 104
129#define R_MIPS16_LO16 105
130#define R_MIPS16_max 106
131
132#define R_MIPS_COPY 126
133#define R_MIPS_JUMP_SLOT 127
134
135/* mips dynamic tags */
136
137#define DT_MIPS_RLD_VERSION 0x70000001
138#define DT_MIPS_TIME_STAMP 0x70000002
139#define DT_MIPS_ICHECKSUM 0x70000003
140#define DT_MIPS_IVERSION 0x70000004
141#define DT_MIPS_FLAGS 0x70000005
142#define DT_MIPS_BASE_ADDRESS 0x70000006
143#define DT_MIPS_CONFLICT 0x70000008
144#define DT_MIPS_LIBLIST 0x70000009
145#define DT_MIPS_CONFLICTNO 0x7000000b
146#define DT_MIPS_LOCAL_GOTNO 0x7000000a /* number of local got ents */
147#define DT_MIPS_LIBLISTNO 0x70000010
148#define DT_MIPS_SYMTABNO 0x70000011 /* number of .dynsym entries */
149#define DT_MIPS_UNREFEXTNO 0x70000012
150#define DT_MIPS_GOTSYM 0x70000013 /* first dynamic sym in got */
151#define DT_MIPS_HIPAGENO 0x70000014
152#define DT_MIPS_RLD_MAP 0x70000016 /* address of loader map */
153#define DT_MIPS_PLTGOT 0x70000032
154#define DT_MIPS_RWPLT 0x70000034
155#define DT_MIPS_RLD_MAP_REL 0x70000035
156
157/*
158 * ELF Flags
159 */
160#define EF_MIPS_PIC 0x00000002 /* Contains PIC code */
161#define EF_MIPS_CPIC 0x00000004 /* STD PIC calling sequence */
162#define EF_MIPS_ABI2 0x00000020 /* N32 */
163
164#define EF_MIPS_ARCH_ASE 0x0f000000 /* Architectural extensions */
165#define EF_MIPS_ARCH_MDMX 0x08000000 /* MDMX multimedia extension */
166#define EF_MIPS_ARCH_M16 0x04000000 /* MIPS-16 ISA extensions */
167
168#define EF_MIPS_ARCH 0xf0000000 /* Architecture field */
169#define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code */
170#define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code */
171#define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code */
172#define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code */
173#define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code */
174#define EF_MIPS_ARCH_32 0x50000000 /* -mips32 code */
175#define EF_MIPS_ARCH_64 0x60000000 /* -mips64 code */
176#define EF_MIPS_ARCH_32R2 0x70000000 /* -mips32r2 code */
177#define EF_MIPS_ARCH_64R2 0x80000000 /* -mips64r2 code */
178
179#define EF_MIPS_ABI 0x0000f000
180#define EF_MIPS_ABI_O32 0x00001000
181#define EF_MIPS_ABI_O64 0x00002000
182#define EF_MIPS_ABI_EABI32 0x00003000
183#define EF_MIPS_ABI_EABI64 0x00004000
184
185#if defined(__MIPSEB__)
186#define ELF32_MACHDEP_ENDIANNESS ELFDATA2MSB
187#define ELF64_MACHDEP_ENDIANNESS ELFDATA2MSB
188#elif defined(__MIPSEL__)
189#define ELF32_MACHDEP_ENDIANNESS ELFDATA2LSB
190#define ELF64_MACHDEP_ENDIANNESS ELFDATA2LSB
191#elif !defined(HAVE_NBTOOL_CONFIG_H)
192#error neither __MIPSEL__ nor __MIPSEB__ are defined.
193#endif
194
195#ifdef _KERNEL
196#ifdef _KERNEL_OPT
197#include "opt_compat_netbsd.h"
198#endif
199#ifdef COMPAT_16
200/*
201 * Up to 1.6, the ELF dynamic loader (ld.elf_so) was not relocatable.
202 * Tell the kernel ELF exec code not to try relocating the interpreter
203 * for dynamically-linked ELF binaries.
204 */
205#define ELF_INTERP_NON_RELOCATABLE
206#endif /* COMPAT_16 */
207
208/*
209 * We need to be able to include the ELF header so we can pick out the
210 * ABI being used.
211 */
212#ifdef ELFSIZE
213#define ELF_MD_PROBE_FUNC ELFNAME2(mips_netbsd,probe)
214#define ELF_MD_COREDUMP_SETUP ELFNAME2(coredump,setup)
215#endif
216
217struct exec_package;
218
219int mips_netbsd_elf32_probe(struct lwp *, struct exec_package *, void *, char *,
220 vaddr_t *);
221void coredump_elf32_setup(struct lwp *, void *);
222
223int mips_netbsd_elf64_probe(struct lwp *, struct exec_package *, void *, char *,
224 vaddr_t *);
225void coredump_elf64_setup(struct lwp *, void *);
226#endif /* _KERNEL */
227
228#endif /* _MIPS_ELF_MACHDEP_H_ */