1047c6e3aSAndrew Turner /*- 2047c6e3aSAndrew Turner * Copyright (c) 1999, 2000 John D. Polstra. 3047c6e3aSAndrew Turner * Copyright (c) 2014 the FreeBSD Foundation 4047c6e3aSAndrew Turner * All rights reserved. 5047c6e3aSAndrew Turner * 6047c6e3aSAndrew Turner * Portions of this software were developed by Andrew Turner 7047c6e3aSAndrew Turner * under sponsorship from the FreeBSD Foundation. 8047c6e3aSAndrew Turner * 9047c6e3aSAndrew Turner * Redistribution and use in source and binary forms, with or without 10047c6e3aSAndrew Turner * modification, are permitted provided that the following conditions 11047c6e3aSAndrew Turner * are met: 12047c6e3aSAndrew Turner * 1. Redistributions of source code must retain the above copyright 13047c6e3aSAndrew Turner * notice, this list of conditions and the following disclaimer. 14047c6e3aSAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright 15047c6e3aSAndrew Turner * notice, this list of conditions and the following disclaimer in the 16047c6e3aSAndrew Turner * documentation and/or other materials provided with the distribution. 17047c6e3aSAndrew Turner * 18047c6e3aSAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19047c6e3aSAndrew Turner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20047c6e3aSAndrew Turner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21047c6e3aSAndrew Turner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22047c6e3aSAndrew Turner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23047c6e3aSAndrew Turner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24047c6e3aSAndrew Turner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25047c6e3aSAndrew Turner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26047c6e3aSAndrew Turner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27047c6e3aSAndrew Turner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28047c6e3aSAndrew Turner * SUCH DAMAGE. 29047c6e3aSAndrew Turner * 30047c6e3aSAndrew Turner * $FreeBSD$ 31047c6e3aSAndrew Turner */ 32047c6e3aSAndrew Turner 33047c6e3aSAndrew Turner #ifndef RTLD_MACHDEP_H 34047c6e3aSAndrew Turner #define RTLD_MACHDEP_H 1 35047c6e3aSAndrew Turner 36047c6e3aSAndrew Turner #include <sys/types.h> 37047c6e3aSAndrew Turner #include <machine/atomic.h> 38047c6e3aSAndrew Turner 39047c6e3aSAndrew Turner struct Struct_Obj_Entry; 40047c6e3aSAndrew Turner 41047c6e3aSAndrew Turner /* Return the address of the .dynamic section in the dynamic linker. */ 42047c6e3aSAndrew Turner #define rtld_dynamic(obj) \ 43047c6e3aSAndrew Turner ({ \ 44047c6e3aSAndrew Turner Elf_Addr _dynamic_addr; \ 45047c6e3aSAndrew Turner asm volatile("adr %0, _DYNAMIC" : "=&r"(_dynamic_addr)); \ 46047c6e3aSAndrew Turner (const Elf_Dyn *)_dynamic_addr; \ 47047c6e3aSAndrew Turner }) 48047c6e3aSAndrew Turner 49047c6e3aSAndrew Turner Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 50e35ddbe4SKonstantin Belousov const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 51047c6e3aSAndrew Turner const Elf_Rel *rel); 52047c6e3aSAndrew Turner 53047c6e3aSAndrew Turner #define make_function_pointer(def, defobj) \ 54047c6e3aSAndrew Turner ((defobj)->relocbase + (def)->st_value) 55047c6e3aSAndrew Turner 56047c6e3aSAndrew Turner #define call_initfini_pointer(obj, target) \ 57047c6e3aSAndrew Turner (((InitFunc)(target))()) 58047c6e3aSAndrew Turner 59047c6e3aSAndrew Turner #define call_init_pointer(obj, target) \ 60047c6e3aSAndrew Turner (((InitArrFunc)(target))(main_argc, main_argv, environ)) 61047c6e3aSAndrew Turner 626e4fdb5cSAndrew Turner /* 636e4fdb5cSAndrew Turner * Pass zeros into the ifunc resolver so we can change them later. The first 646e4fdb5cSAndrew Turner * 8 arguments on arm64 are passed in registers so make them known values 656e4fdb5cSAndrew Turner * if we decide to use them later. Because of this ifunc resolvers can assume 666e4fdb5cSAndrew Turner * no arguments are passeed in, and if this changes later will be able to 676e4fdb5cSAndrew Turner * compare the argument with 0 to see if it is set. 686e4fdb5cSAndrew Turner */ 694352999eSKonstantin Belousov #define call_ifunc_resolver(ptr) \ 706e4fdb5cSAndrew Turner (((Elf_Addr (*)(uint64_t, uint64_t, uint64_t, uint64_t, uint64_t, \ 716e4fdb5cSAndrew Turner uint64_t, uint64_t, uint64_t))ptr)(0, 0, 0, 0, 0, 0, 0, 0)) 724352999eSKonstantin Belousov 73047c6e3aSAndrew Turner #define round(size, align) \ 74047c6e3aSAndrew Turner (((size) + (align) - 1) & ~((align) - 1)) 75e5c3405cSKonstantin Belousov #define calculate_first_tls_offset(size, align, offset) \ 767c812942SAndrew Turner round(16, align) 77e5c3405cSKonstantin Belousov #define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \ 787c812942SAndrew Turner round(prev_offset + prev_size, align) 79047c6e3aSAndrew Turner #define calculate_tls_end(off, size) ((off) + (size)) 8017fb2856SBrooks Davis #define calculate_tls_post_size(align) \ 8117fb2856SBrooks Davis round(TLS_TCB_SIZE, align) - TLS_TCB_SIZE 82047c6e3aSAndrew Turner 837c812942SAndrew Turner #define TLS_TCB_SIZE 16 84047c6e3aSAndrew Turner typedef struct { 85047c6e3aSAndrew Turner unsigned long ti_module; 86047c6e3aSAndrew Turner unsigned long ti_offset; 87047c6e3aSAndrew Turner } tls_index; 88047c6e3aSAndrew Turner 89047c6e3aSAndrew Turner extern void *__tls_get_addr(tls_index *ti); 90047c6e3aSAndrew Turner 91047c6e3aSAndrew Turner #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 92047c6e3aSAndrew Turner #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 93047c6e3aSAndrew Turner 948fd53f45SWarner Losh #define md_abi_variant_hook(x) 958fd53f45SWarner Losh 96047c6e3aSAndrew Turner #endif 97