FreeBSD/Linux Kernel Cross Reference
sys/sys/imgact_elf.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1995-1996 Søren Schmidt
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 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * $FreeBSD: releng/12.0/sys/sys/imgact_elf.h 334165 2018-05-24 16:25:18Z brooks $
31 */
32
33 #ifndef _SYS_IMGACT_ELF_H_
34 #define _SYS_IMGACT_ELF_H_
35
36 #include <machine/elf.h>
37
38 #ifdef _KERNEL
39
40 #define AUXARGS_ENTRY(pos, id, val) \
41 {(pos)->a_type = (id); (pos)->a_un.a_val = (val); (pos)++;}
42
43 struct image_params;
44 struct thread;
45 struct vnode;
46
47 /*
48 * Structure used to pass information from the loader to the
49 * stack fixup routine.
50 */
51 typedef struct {
52 Elf_Ssize execfd;
53 Elf_Size phdr;
54 Elf_Size phent;
55 Elf_Size phnum;
56 Elf_Size pagesz;
57 Elf_Size base;
58 Elf_Size flags;
59 Elf_Size entry;
60 Elf_Word hdr_eflags; /* e_flags field from ehdr */
61 } __ElfN(Auxargs);
62
63 typedef struct {
64 Elf_Note hdr;
65 const char * vendor;
66 int flags;
67 bool (*trans_osrel)(const Elf_Note *, int32_t *);
68 #define BN_CAN_FETCH_OSREL 0x0001 /* Deprecated. */
69 #define BN_TRANSLATE_OSREL 0x0002 /* Use trans_osrel to fetch osrel */
70 /* after checking the image ABI specification, if needed. */
71 } Elf_Brandnote;
72
73 typedef struct {
74 int brand;
75 int machine;
76 const char *compat_3_brand; /* pre Binutils 2.10 method (FBSD 3) */
77 const char *emul_path;
78 const char *interp_path;
79 struct sysentvec *sysvec;
80 const char *interp_newpath;
81 int flags;
82 Elf_Brandnote *brand_note;
83 boolean_t (*header_supported)(struct image_params *);
84 #define BI_CAN_EXEC_DYN 0x0001
85 #define BI_BRAND_NOTE 0x0002 /* May have note.ABI-tag section. */
86 #define BI_BRAND_NOTE_MANDATORY 0x0004 /* Must have note.ABI-tag section. */
87 #define BI_BRAND_ONLY_STATIC 0x0008 /* Match only interp-less binaries. */
88 } __ElfN(Brandinfo);
89
90 __ElfType(Auxargs);
91 __ElfType(Brandinfo);
92
93 #define MAX_BRANDS 8
94
95 int __elfN(brand_inuse)(Elf_Brandinfo *entry);
96 int __elfN(insert_brand_entry)(Elf_Brandinfo *entry);
97 int __elfN(remove_brand_entry)(Elf_Brandinfo *entry);
98 int __elfN(freebsd_fixup)(register_t **, struct image_params *);
99 int __elfN(coredump)(struct thread *, struct vnode *, off_t, int);
100 size_t __elfN(populate_note)(int, void *, void *, size_t, void **);
101
102 /* Machine specific function to dump per-thread information. */
103 void __elfN(dump_thread)(struct thread *, void *, size_t *);
104
105 extern int __elfN(fallback_brand);
106 extern Elf_Brandnote __elfN(freebsd_brandnote);
107 extern Elf_Brandnote __elfN(kfreebsd_brandnote);
108 #endif /* _KERNEL */
109
110 #endif /* !_SYS_IMGACT_ELF_H_ */
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