rtld_machdep.h revision 309061 
1/*-
2 * Copyright (c) 1999, 2000 John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/libexec/rtld-elf/powerpc/rtld_machdep.h 309061 2016-11-23 17:48:43Z kib $
27 */
28
29#ifndef RTLD_MACHDEP_H
30#define RTLD_MACHDEP_H	1
31
32#include <sys/types.h>
33#include <machine/atomic.h>
34
35struct Struct_Obj_Entry;
36
37/* Return the address of the .dynamic section in the dynamic linker. */
38#define rtld_dynamic(obj)    (&_DYNAMIC)
39
40Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
41		       const struct Struct_Obj_Entry *defobj,
42		       const struct Struct_Obj_Entry *obj,
43		       const Elf_Rel *rel);
44
45#define make_function_pointer(def, defobj) \
46	((defobj)->relocbase + (def)->st_value)
47
48#define call_initfini_pointer(obj, target) \
49	(((InitFunc)(target))())
50
51#define call_init_pointer(obj, target) \
52	(((InitArrFunc)(target))(main_argc, main_argv, environ))
53
54#define	call_ifunc_resolver(ptr) \
55	(((Elf_Addr (*)(void))ptr)())
56
57/*
58 * Lazy binding entry point, called via PLT.
59 */
60void _rtld_bind_start(void);
61
62/*
63 * PLT functions. Not really correct prototypes, but the
64 * symbol values are needed.
65 */
66void _rtld_powerpc_pltlongresolve(void);
67void _rtld_powerpc_pltresolve(void);
68void _rtld_powerpc_pltcall(void);
69
70/*
71 * TLS
72 */
73
74#define TLS_TP_OFFSET	0x7000
75#define TLS_DTV_OFFSET	0x8000
76#define TLS_TCB_SIZE	8
77
78#define round(size, align) \
79    (((size) + (align) - 1) & ~((align) - 1))
80#define calculate_first_tls_offset(size, align) \
81    round(8, align)
82#define calculate_tls_offset(prev_offset, prev_size, size, align) \
83    round(prev_offset + prev_size, align)
84#define calculate_tls_end(off, size)    ((off) + (size))
85
86typedef struct {
87	unsigned long ti_module;
88	unsigned long ti_offset;
89} tls_index;
90
91extern void *__tls_get_addr(tls_index* ti);
92
93#define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X
94#define	RTLD_DEFAULT_STACK_EXEC		PROT_EXEC
95
96#endif
97