1 /*- 2 * Copyright (c) 1999, 2000 John D. Polstra. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 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 35 struct Struct_Obj_Entry; 36 37 /* Return the address of the .dynamic section in the dynamic linker. */ 38 #define rtld_dynamic(obj) (&_DYNAMIC) 39 40 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 41 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 42 const Elf_Rel *rel); 43 44 #define make_function_pointer(def, defobj) \ 45 ((defobj)->relocbase + (def)->st_value) 46 47 #define call_initfini_pointer(obj, target) \ 48 (((InitFunc)(target))()) 49 50 #define call_init_pointer(obj, target) \ 51 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 52 53 #define call_ifunc_resolver(ptr) \ 54 (((Elf_Addr (*)(void))ptr)()) 55 56 #define TLS_TCB_SIZE 8 57 typedef struct { 58 unsigned long ti_module; 59 unsigned long ti_offset; 60 } tls_index; 61 62 #define round(size, align) \ 63 (((size) + (align) - 1) & ~((align) - 1)) 64 #define calculate_first_tls_offset(size, align) \ 65 round(8, align) 66 #define calculate_tls_offset(prev_offset, prev_size, size, align) \ 67 round(prev_offset + prev_size, align) 68 #define calculate_tls_end(off, size) ((off) + (size)) 69 70 /* 71 * Lazy binding entry point, called via PLT. 72 */ 73 void _rtld_bind_start(void); 74 75 extern void *__tls_get_addr(tls_index *ti); 76 77 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 78 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 79 80 extern void arm_abi_variant_hook(Elf_Auxinfo **); 81 82 #define md_abi_variant_hook(x) arm_abi_variant_hook(x) 83 #define RTLD_VARIANT_ENV_NAMES 84 85 #endif 86