1 /*- 2 * Copyright (c) 1999, 2000 John D. Polstra. 3 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 4 * All rights reserved. 5 * 6 * Portions of this software were developed by SRI International and the 7 * University of Cambridge Computer Laboratory under DARPA/AFRL contract 8 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. 9 * 10 * Portions of this software were developed by the University of Cambridge 11 * Computer Laboratory as part of the CTSRD Project, with support from the 12 * UK Higher Education Innovation Fund (HEIF). 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef RTLD_MACHDEP_H 37 #define RTLD_MACHDEP_H 1 38 39 #include <sys/types.h> 40 #include <machine/atomic.h> 41 #include <machine/tls.h> 42 43 struct Struct_Obj_Entry; 44 45 #define MD_OBJ_ENTRY 46 47 #define MD_OBJ_ENTRY_INIT(obj) 48 #define MD_OBJ_ENTRY_FINI(obj) 49 50 uint64_t set_gp(struct Struct_Obj_Entry *obj); 51 52 /* Return the address of the .dynamic section in the dynamic linker. */ 53 #define rtld_dynamic(obj) \ 54 ({ \ 55 Elf_Addr _dynamic_addr; \ 56 __asm __volatile("lla %0, _DYNAMIC" : "=r"(_dynamic_addr)); \ 57 (const Elf_Dyn *)_dynamic_addr; \ 58 }) 59 60 /* No arch-specific dynamic tags */ 61 #define arch_digest_dynamic(obj, dynp) false 62 63 /* No architecture specific notes */ 64 #define arch_digest_note(obj, note) false 65 66 #define arch_fix_auxv(a, ai) do {} while (0) 67 68 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 69 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 70 const Elf_Rel *rel); 71 72 #define make_function_pointer(def, defobj) \ 73 ((defobj)->relocbase + (def)->st_value) 74 75 #define call_initfini_pointer(obj, target) \ 76 ({ \ 77 uint64_t old0; \ 78 old0 = set_gp(obj); \ 79 (((InitFunc)(target))()); \ 80 __asm __volatile("mv gp, %0" :: "r"(old0)); \ 81 }) 82 83 #define call_init_pointer(obj, target) \ 84 ({ \ 85 uint64_t old1; \ 86 old1 = set_gp(obj); \ 87 (((InitArrFunc)(target))(main_argc, main_argv, environ)); \ 88 __asm __volatile("mv gp, %0" :: "r"(old1)); \ 89 }) 90 91 extern unsigned long elf_hwcap; 92 #define call_ifunc_resolver(ptr) \ 93 (((Elf_Addr (*)(unsigned long, unsigned long, unsigned long, \ 94 unsigned long, unsigned long, unsigned long, unsigned long, \ 95 unsigned long))ptr)(elf_hwcap, 0, 0, 0, 0, 0, 0, 0)) 96 97 /* 98 * TLS 99 */ 100 101 #define round(size, align) \ 102 (((size) + (align) - 1) & ~((align) - 1)) 103 #define calculate_first_tls_offset(size, align, offset) \ 104 TLS_TCB_SIZE 105 #define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \ 106 round(prev_offset + prev_size, align) 107 #define calculate_tls_post_size(align) 0 108 109 typedef struct { 110 unsigned long ti_module; 111 unsigned long ti_offset; 112 } tls_index; 113 114 extern void *__tls_get_addr(tls_index* ti); 115 116 #define md_abi_variant_hook(x) 117 118 #endif 119