1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999, 2000 John D. Polstra.
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#ifndef RTLD_MACHDEP_H
32#define RTLD_MACHDEP_H	1
33
34#include <sys/types.h>
35#include <machine/atomic.h>
36#include <machine/acle-compat.h>
37
38struct Struct_Obj_Entry;
39
40/* Return the address of the .dynamic section in the dynamic linker. */
41#define rtld_dynamic(obj) (&_DYNAMIC)
42
43Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
44    const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
45    const Elf_Rel *rel);
46
47#define make_function_pointer(def, defobj) \
48	((defobj)->relocbase + (def)->st_value)
49
50#define call_initfini_pointer(obj, target) \
51	(((InitFunc)(target))())
52
53#define call_init_pointer(obj, target) \
54	(((InitArrFunc)(target))(main_argc, main_argv, environ))
55
56#define	call_ifunc_resolver(ptr) \
57	(((Elf_Addr (*)(void))ptr)())
58
59#define	TLS_TCB_SIZE	8
60typedef struct {
61	unsigned long ti_module;
62	unsigned long ti_offset;
63} tls_index;
64
65#define round(size, align) \
66    (((size) + (align) - 1) & ~((align) - 1))
67#define calculate_first_tls_offset(size, align, offset)	\
68    round(8, align)
69#define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \
70    round(prev_offset + prev_size, align)
71#define calculate_tls_end(off, size)    ((off) + (size))
72#define calculate_tls_post_size(align) \
73    round(TLS_TCB_SIZE, align) - TLS_TCB_SIZE
74
75extern void *__tls_get_addr(tls_index *ti);
76
77#define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X
78#define	RTLD_DEFAULT_STACK_EXEC		PROT_EXEC
79
80extern void arm_abi_variant_hook(Elf_Auxinfo **);
81
82#ifdef __ARM_FP
83#define md_abi_variant_hook(x)		arm_abi_variant_hook(x)
84#define RTLD_VARIANT_ENV_NAMES
85#else
86#define md_abi_variant_hook(x)
87#endif
88
89#define	TLS_DTV_OFFSET	0
90
91#endif
92