xref: /freebsd/libexec/rtld-elf/amd64/rtld_machdep.h (revision d93a896ef95946b0bf1219866fcb324b78543444)
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  * $FreeBSD$
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 
35 struct Struct_Obj_Entry;
36 
37 /* Return the address of the .dynamic section in the dynamic linker. */
38 Elf_Dyn *rtld_dynamic_addr(void);
39 #define	rtld_dynamic(obj)	rtld_dynamic_addr()
40 
41 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
42     const struct Struct_Obj_Entry *obj, const struct Struct_Obj_Entry *refobj,
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 extern uint32_t cpu_feature;
55 extern uint32_t cpu_feature2;
56 extern uint32_t cpu_stdext_feature;
57 extern uint32_t cpu_stdext_feature2;
58 #define	call_ifunc_resolver(ptr) \
59 	(((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t))ptr)( \
60 	    cpu_feature, cpu_feature2, cpu_stdext_feature, cpu_stdext_feature2))
61 
62 #define round(size, align) \
63 	(((size) + (align) - 1) & ~((align) - 1))
64 #define calculate_first_tls_offset(size, align) \
65 	round(size, align)
66 #define calculate_tls_offset(prev_offset, prev_size, size, align) \
67 	round((prev_offset) + (size), align)
68 #define calculate_tls_end(off, size) 	(off)
69 
70 typedef struct {
71     unsigned long ti_module;
72     unsigned long ti_offset;
73 } tls_index;
74 
75 void *__tls_get_addr(tls_index *ti) __exported;
76 
77 #define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X
78 #define	RTLD_DEFAULT_STACK_EXEC		PROT_EXEC
79 
80 #define md_abi_variant_hook(x)
81 
82 #endif
83