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>
39 struct Struct_Obj_Entry;
41 /* Return the address of the .dynamic section in the dynamic linker. */
42 #define rtld_dynamic(obj) \
44 Elf_Addr _dynamic_addr; \
45 asm volatile("adr %0, _DYNAMIC" : "=&r"(_dynamic_addr)); \
46 (const Elf_Dyn *)_dynamic_addr; \
49 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
50 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
53 #define make_function_pointer(def, defobj) \
54 ((defobj)->relocbase + (def)->st_value)
56 #define call_initfini_pointer(obj, target) \
57 (((InitFunc)(target))())
59 #define call_init_pointer(obj, target) \
60 (((InitArrFunc)(target))(main_argc, main_argv, environ))
62 #define call_ifunc_resolver(ptr) \
63 (((Elf_Addr (*)(void))ptr)())
65 #define round(size, align) \
66 (((size) + (align) - 1) & ~((align) - 1))
67 #define calculate_first_tls_offset(size, align) \
69 #define calculate_tls_offset(prev_offset, prev_size, size, align) \
70 round(prev_offset + prev_size, align)
71 #define calculate_tls_end(off, size) ((off) + (size))
72 #define calculate_tls_post_size(align) \
73 round(TLS_TCB_SIZE, align) - TLS_TCB_SIZE
75 #define TLS_TCB_SIZE 16
77 unsigned long ti_module;
78 unsigned long ti_offset;
81 extern void *__tls_get_addr(tls_index *ti);
83 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X
84 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC
86 #define md_abi_variant_hook(x)