xref: /freebsd/libexec/rtld-elf/powerpc64/rtld_machdep.h (revision cc426dd31990b8b50b210efc450e404596548ca1)
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 
37 struct Struct_Obj_Entry;
38 
39 /* Return the address of the .dynamic section in the dynamic linker. */
40 #define rtld_dynamic(obj)    (&_DYNAMIC)
41 
42 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
43     const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
44     const Elf_Rel *rel);
45 void reloc_non_plt_self(Elf_Dyn *dynp, Elf_Addr relocbase);
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 /*
60  * TLS
61  */
62 
63 #define TLS_TP_OFFSET	0x7000
64 #define TLS_DTV_OFFSET	0x8000
65 #define TLS_TCB_SIZE	16
66 
67 #define round(size, align) \
68     (((size) + (align) - 1) & ~((align) - 1))
69 #define calculate_first_tls_offset(size, align) \
70     TLS_TCB_SIZE
71 #define calculate_tls_offset(prev_offset, prev_size, size, align) \
72     round(prev_offset + prev_size, align)
73 #define calculate_tls_end(off, size)    ((off) + (size))
74 #define calculate_tls_post_size(align)  0
75 
76 typedef struct {
77 	unsigned long ti_module;
78 	unsigned long ti_offset;
79 } tls_index;
80 
81 extern void *__tls_get_addr(tls_index* ti);
82 
83 #define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X
84 #define	RTLD_DEFAULT_STACK_EXEC		PROT_EXEC
85 
86 #define md_abi_variant_hook(x)
87 
88 #endif
89