2 * Copyright (c) 1999, 2000 John D. Polstra.
3 * Copyright (c) 2014 the FreeBSD Foundation
6 * Portions of this software were developed by Andrew Turner
7 * under sponsorship from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef RTLD_MACHDEP_H
34 #define RTLD_MACHDEP_H 1
36 #include <sys/types.h>
37 #include <machine/atomic.h>
38 #include <machine/tls.h>
40 struct Struct_Obj_Entry;
42 /* Return the address of the .dynamic section in the dynamic linker. */
43 #define rtld_dynamic(obj) \
45 Elf_Addr _dynamic_addr; \
46 asm volatile("adr %0, _DYNAMIC" : "=&r"(_dynamic_addr)); \
47 (const Elf_Dyn *)_dynamic_addr; \
50 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
51 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
54 #define make_function_pointer(def, defobj) \
55 ((defobj)->relocbase + (def)->st_value)
57 #define call_initfini_pointer(obj, target) \
58 (((InitFunc)(target))())
60 #define call_init_pointer(obj, target) \
61 (((InitArrFunc)(target))(main_argc, main_argv, environ))
64 * Pass zeros into the ifunc resolver so we can change them later. The first
65 * 8 arguments on arm64 are passed in registers so make them known values
66 * if we decide to use them later. Because of this ifunc resolvers can assume
67 * no arguments are passeed in, and if this changes later will be able to
68 * compare the argument with 0 to see if it is set.
70 #define call_ifunc_resolver(ptr) \
71 (((Elf_Addr (*)(uint64_t, uint64_t, uint64_t, uint64_t, uint64_t, \
72 uint64_t, uint64_t, uint64_t))ptr)(0, 0, 0, 0, 0, 0, 0, 0))
74 #define round(size, align) \
75 (((size) + (align) - 1) & ~((align) - 1))
76 #define calculate_first_tls_offset(size, align, offset) \
78 #define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \
79 round(prev_offset + prev_size, align)
80 #define calculate_tls_post_size(align) \
81 round(TLS_TCB_SIZE, align) - TLS_TCB_SIZE
84 unsigned long ti_module;
85 unsigned long ti_offset;
88 extern void *__tls_get_addr(tls_index *ti);
90 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X
91 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC
93 #define md_abi_variant_hook(x)