xref: /freebsd/libexec/rtld-elf/powerpc64/rtld_machdep.h (revision 5b56413d04e608379c9a306373554a8e4d321bc0)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
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 
29 #ifndef RTLD_MACHDEP_H
30 #define RTLD_MACHDEP_H	1
31 
32 #include <sys/types.h>
33 #include <machine/atomic.h>
34 #include <machine/tls.h>
35 
36 struct Struct_Obj_Entry;
37 
38 #define	MD_OBJ_ENTRY	\
39     Elf_Addr glink;		/* GLINK PLT call stub section */
40 
41 /* Return the address of the .dynamic section in the dynamic linker. */
42 #define rtld_dynamic(obj)    (&_DYNAMIC)
43 
44 bool arch_digest_dynamic(struct Struct_Obj_Entry *, const Elf_Dyn *);
45 
46 /* No architecture specific notes */
47 #define	arch_digest_note(obj, note)	false
48 
49 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
50     const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
51     const Elf_Rel *rel);
52 void reloc_non_plt_self(Elf_Dyn *dynp, Elf_Addr relocbase);
53 
54 #define make_function_pointer(def, defobj) \
55 	((defobj)->relocbase + (def)->st_value)
56 
57 #define call_initfini_pointer(obj, target) \
58 	(((InitFunc)(target))())
59 
60 #define call_init_pointer(obj, target) \
61 	(((InitArrFunc)(target))(main_argc, main_argv, environ))
62 
63 extern u_long cpu_features; /* r3 */
64 extern u_long cpu_features2; /* r4 */
65 /* r5-r10: ifunc resolver parameters reserved for future assignment. */
66 #define	call_ifunc_resolver(ptr) \
67 	(((Elf_Addr (*)(uint32_t, uint32_t, uint64_t, uint64_t, uint64_t, \
68            uint64_t, uint64_t, uint64_t))ptr)((uint32_t)cpu_features, \
69            (uint32_t)cpu_features2, 0, 0, 0, 0, 0, 0))
70 
71 /*
72  * TLS
73  */
74 
75 #define round(size, align) \
76     (((size) + (align) - 1) & ~((align) - 1))
77 #define calculate_first_tls_offset(size, align, offset)	\
78     TLS_TCB_SIZE
79 #define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \
80     round(prev_offset + prev_size, align)
81 #define calculate_tls_post_size(align)  0
82 
83 typedef struct {
84 	unsigned long ti_module;
85 	unsigned long ti_offset;
86 } tls_index;
87 
88 extern void *__tls_get_addr(tls_index* ti);
89 
90 extern void powerpc64_abi_variant_hook(Elf_Auxinfo **);
91 #define md_abi_variant_hook(x) powerpc64_abi_variant_hook(x)
92 
93 #endif
94