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 36struct Struct_Obj_Entry; 37 38#define MD_OBJ_ENTRY \ 39 Elf_Addr *gotptr; /* GOT pointer (secure-plt only) */ 40 41/* Return the address of the .dynamic section in the dynamic linker. */ 42#define rtld_dynamic(obj) (&_DYNAMIC) 43 44bool arch_digest_dynamic(struct Struct_Obj_Entry *, const Elf_Dyn *); 45 46/* No architecture specific notes */ 47#define arch_digest_note(obj, note) false 48 49Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 50 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 51 const Elf_Rel *rel); 52void reloc_non_plt_self(Elf_Dyn *dynp, Elf_Addr relocbase); 53 54#define make_function_pointer(def, defobj) \ 55 ((defobj)->relocbase + (def)->st_value) 56 57#define call_initfini_pointer(obj, target) \ 58 (((InitFunc)(target))()) 59 60#define call_init_pointer(obj, target) \ 61 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 62 63extern u_long cpu_features; /* r3 */ 64extern u_long cpu_features2; /* r4 */ 65/* r5-10: ifunc resolver parameters reserved for future assignment. */ 66#define call_ifunc_resolver(ptr) \ 67 (((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, \ 68 uint32_t, uint32_t, uint32_t))ptr)((uint32_t)cpu_features, \ 69 (uint32_t)cpu_features2, 0, 0, 0, 0, 0, 0)) 70 71/* 72 * PLT functions. Not really correct prototypes, but the 73 * symbol values are needed. 74 */ 75void _rtld_powerpc_pltlongresolve(void); 76void _rtld_powerpc_pltresolve(void); 77void _rtld_powerpc_pltcall(void); 78 79/* 80 * TLS 81 */ 82 83#define round(size, align) \ 84 (((size) + (align) - 1) & ~((align) - 1)) 85#define calculate_first_tls_offset(size, align, offset) \ 86 TLS_TCB_SIZE 87#define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \ 88 round(prev_offset + prev_size, align) 89#define calculate_tls_post_size(align) 0 90 91typedef struct { 92 unsigned long ti_module; 93 unsigned long ti_offset; 94} tls_index; 95 96extern void *__tls_get_addr(tls_index* ti); 97 98extern void powerpc_abi_variant_hook(Elf_Auxinfo **); 99#define md_abi_variant_hook(x) powerpc_abi_variant_hook(x) 100 101#endif 102