1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1999, 2000 John D. Polstra. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef RTLD_MACHDEP_H 30 #define RTLD_MACHDEP_H 1 31 32 #include <sys/types.h> 33 #include <machine/atomic.h> 34 #include <machine/tls.h> 35 36 struct Struct_Obj_Entry; 37 38 #define MD_OBJ_ENTRY \ 39 STAILQ_HEAD(, tlsdesc_dynarg) tlsdesc_dynargs; 40 41 #define MD_OBJ_ENTRY_INIT(obj) md_obj_entry_init(obj) 42 #define MD_OBJ_ENTRY_FINI(obj) md_obj_entry_fini(obj) 43 44 void md_obj_entry_init(struct Struct_Obj_Entry *obj); 45 void md_obj_entry_fini(struct Struct_Obj_Entry *obj); 46 47 /* Return the address of the .dynamic section in the dynamic linker. */ 48 Elf_Dyn *rtld_dynamic_addr(void); 49 #define rtld_dynamic(obj) rtld_dynamic_addr() 50 51 /* No arch-specific dynamic tags */ 52 #define arch_digest_dynamic(obj, dynp) false 53 54 /* No architecture specific notes */ 55 #define arch_digest_note(obj, note) false 56 57 #define arch_fix_auxv(a, ai) do {} while (0) 58 59 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 60 const struct Struct_Obj_Entry *obj, const struct Struct_Obj_Entry *refobj, 61 const Elf_Rel *rel); 62 63 #define make_function_pointer(def, defobj) \ 64 ((defobj)->relocbase + (def)->st_value) 65 66 #define call_initfini_pointer(obj, target) \ 67 (((InitFunc)(target))()) 68 69 #define call_init_pointer(obj, target) \ 70 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 71 72 extern uint32_t cpu_feature; 73 extern uint32_t cpu_feature2; 74 extern uint32_t cpu_stdext_feature; 75 extern uint32_t cpu_stdext_feature2; 76 #define call_ifunc_resolver(ptr) \ 77 (((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t))ptr)( \ 78 cpu_feature, cpu_feature2, cpu_stdext_feature, cpu_stdext_feature2)) 79 80 typedef struct { 81 unsigned long ti_module; 82 unsigned long ti_offset; 83 } tls_index; 84 85 void *__tls_get_addr(tls_index *ti) __exported; 86 87 #define __NONE_ABI /* Cannot be expressed in C */ 88 89 struct tlsdesc_dynarg 90 { 91 tls_index tlsinfo; 92 STAILQ_ENTRY(tlsdesc_dynarg) link; 93 }; 94 95 struct tlsdesc 96 { 97 ptrdiff_t (*entry)(struct tlsdesc *) __NONE_ABI; 98 union { 99 Elf_Ssize addend; 100 Elf_Size offset; 101 struct tlsdesc_dynarg *arg; 102 }; 103 }; 104 105 #define md_abi_variant_hook(x) 106 107 size_t calculate_first_tls_offset(size_t size, size_t align, size_t offset); 108 size_t calculate_tls_offset(size_t prev_offset, size_t prev_size, size_t size, 109 size_t align, size_t offset); 110 111 ptrdiff_t rtld_tlsdesc_dynamic_impl(struct tlsdesc_dynarg *tda, 112 struct tcb *tcb); 113 114 ptrdiff_t rtld_tlsdesc_static(struct tlsdesc *) __NONE_ABI; 115 ptrdiff_t rtld_tlsdesc_undef(struct tlsdesc *) __NONE_ABI; 116 ptrdiff_t rtld_tlsdesc_dynamic(struct tlsdesc *) __NONE_ABI; 117 118 #endif 119