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
37struct Struct_Obj_Entry;
38
39/* Return the address of the .dynamic section in the dynamic linker. */
40Elf_Dyn *rtld_dynamic_addr(void);
41#define	rtld_dynamic(obj)	rtld_dynamic_addr()
42
43Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
44    const struct Struct_Obj_Entry *obj, const struct Struct_Obj_Entry *refobj,
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
56extern uint32_t cpu_feature;
57extern uint32_t cpu_feature2;
58extern uint32_t cpu_stdext_feature;
59extern uint32_t cpu_stdext_feature2;
60#define	call_ifunc_resolver(ptr) \
61	(((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t))ptr)( \
62	    cpu_feature, cpu_feature2, cpu_stdext_feature, cpu_stdext_feature2))
63
64typedef struct {
65    unsigned long ti_module;
66    unsigned long ti_offset;
67} tls_index;
68
69void *__tls_get_addr(tls_index *ti) __exported;
70
71#define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X
72#define	RTLD_DEFAULT_STACK_EXEC		PROT_EXEC
73
74#define md_abi_variant_hook(x)
75
76size_t calculate_first_tls_offset(size_t size, size_t align, size_t offset);
77size_t calculate_tls_offset(size_t prev_offset, size_t prev_size, size_t size,
78    size_t align, size_t offset);
79size_t calculate_tls_end(size_t off, size_t size);
80#endif
81