1129204Scognet/*- 2129204Scognet * Copyright (c) 1999, 2000 John D. Polstra. 3129204Scognet * All rights reserved. 4129204Scognet * 5129204Scognet * Redistribution and use in source and binary forms, with or without 6129204Scognet * modification, are permitted provided that the following conditions 7129204Scognet * are met: 8129204Scognet * 1. Redistributions of source code must retain the above copyright 9129204Scognet * notice, this list of conditions and the following disclaimer. 10129204Scognet * 2. Redistributions in binary form must reproduce the above copyright 11129204Scognet * notice, this list of conditions and the following disclaimer in the 12129204Scognet * documentation and/or other materials provided with the distribution. 13129204Scognet * 14129204Scognet * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15129204Scognet * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16129204Scognet * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17129204Scognet * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18129204Scognet * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19129204Scognet * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20129204Scognet * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21129204Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22129204Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23129204Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24129204Scognet * SUCH DAMAGE. 25129204Scognet * 26129204Scognet * $FreeBSD: stable/10/libexec/rtld-elf/arm/rtld_machdep.h 309061 2016-11-23 17:48:43Z kib $ 27129204Scognet */ 28129204Scognet 29129204Scognet#ifndef RTLD_MACHDEP_H 30129204Scognet#define RTLD_MACHDEP_H 1 31129204Scognet 32129204Scognet#include <sys/types.h> 33129204Scognet#include <machine/atomic.h> 34129204Scognet 35129204Scognetstruct Struct_Obj_Entry; 36129204Scognet 37129204Scognet/* Return the address of the .dynamic section in the dynamic linker. */ 38129204Scognet#define rtld_dynamic(obj) (&_DYNAMIC) 39135680Scognet 40129204ScognetElf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 41129204Scognet const struct Struct_Obj_Entry *defobj, 42129204Scognet const struct Struct_Obj_Entry *obj, 43129204Scognet const Elf_Rel *rel); 44129204Scognet 45129204Scognet#define make_function_pointer(def, defobj) \ 46129204Scognet ((defobj)->relocbase + (def)->st_value) 47129204Scognet 48129204Scognet#define call_initfini_pointer(obj, target) \ 49129204Scognet (((InitFunc)(target))()) 50135680Scognet 51232831Skib#define call_init_pointer(obj, target) \ 52232831Skib (((InitArrFunc)(target))(main_argc, main_argv, environ)) 53232831Skib 54309061Skib#define call_ifunc_resolver(ptr) \ 55309061Skib (((Elf_Addr (*)(void))ptr)()) 56309061Skib 57231618Sgonzo#define TLS_TCB_SIZE 8 58135680Scognettypedef struct { 59135680Scognet unsigned long ti_module; 60135680Scognet unsigned long ti_offset; 61135680Scognet} tls_index; 62129204Scognet 63135680Scognet#define round(size, align) \ 64231618Sgonzo (((size) + (align) - 1) & ~((align) - 1)) 65135680Scognet#define calculate_first_tls_offset(size, align) \ 66231618Sgonzo round(8, align) 67135680Scognet#define calculate_tls_offset(prev_offset, prev_size, size, align) \ 68231618Sgonzo round(prev_offset + prev_size, align) 69135680Scognet#define calculate_tls_end(off, size) ((off) + (size)) 70135680Scognet 71129204Scognet/* 72129204Scognet * Lazy binding entry point, called via PLT. 73129204Scognet */ 74129204Scognetvoid _rtld_bind_start(void); 75129204Scognet 76135680Scognetextern void *__tls_get_addr(tls_index *ti); 77138023Scognet 78217851Skib#define RTLD_DEFAULT_STACK_PF_EXEC PF_X 79217851Skib#define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 80217851Skib 81129204Scognet#endif 82