1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 29 */ 30 31 #ifndef RTLD_MACHDEP_H 32 #define RTLD_MACHDEP_H 1 33 34 #include <sys/types.h> 35 #include <machine/atomic.h> 36 37 struct Struct_Obj_Entry; 38 39 /* Return the address of the .dynamic section in the dynamic linker. */ 40 Elf_Dyn *rtld_dynamic_addr(void); 41 #define rtld_dynamic(obj) rtld_dynamic_addr() 42 43 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 44 const struct Struct_Obj_Entry *obj, const struct Struct_Obj_Entry *refobj, 45 const Elf_Rel *rel); 46 47 #define make_function_pointer(def, defobj) \ 48 ((defobj)->relocbase + (def)->st_value) 49 50 #define call_initfini_pointer(obj, target) \ 51 (((InitFunc)(target))()) 52 53 #define call_init_pointer(obj, target) \ 54 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 55 56 extern uint32_t cpu_feature; 57 extern uint32_t cpu_feature2; 58 extern uint32_t cpu_stdext_feature; 59 extern uint32_t cpu_stdext_feature2; 60 #define call_ifunc_resolver(ptr) \ 61 (((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t))ptr)( \ 62 cpu_feature, cpu_feature2, cpu_stdext_feature, cpu_stdext_feature2)) 63 64 typedef struct { 65 unsigned long ti_module; 66 unsigned long ti_offset; 67 } tls_index; 68 69 void *__tls_get_addr(tls_index *ti) __exported; 70 71 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 72 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 73 74 #define md_abi_variant_hook(x) 75 76 size_t calculate_first_tls_offset(size_t size, size_t align, size_t offset); 77 size_t calculate_tls_offset(size_t prev_offset, size_t prev_size, size_t size, 78 size_t align, size_t offset); 79 size_t calculate_tls_end(size_t off, size_t size); 80 #endif 81