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 Elf_Addr glink; /* GLINK PLT call stub section */ 40 41 /* Return the address of the .dynamic section in the dynamic linker. */ 42 #define rtld_dynamic(obj) (&_DYNAMIC) 43 44 bool 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 49 void arch_fix_auxv(Elf_Auxinfo *aux, Elf_Auxinfo *aux_info[]); 50 51 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 52 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 53 const Elf_Rel *rel); 54 void reloc_non_plt_self(Elf_Dyn *dynp, Elf_Addr relocbase); 55 56 #define make_function_pointer(def, defobj) \ 57 ((defobj)->relocbase + (def)->st_value) 58 59 #define call_initfini_pointer(obj, target) \ 60 (((InitFunc)(target))()) 61 62 #define call_init_pointer(obj, target) \ 63 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 64 65 extern u_long cpu_features; /* r3 */ 66 extern u_long cpu_features2; /* r4 */ 67 /* r5-r10: ifunc resolver parameters reserved for future assignment. */ 68 #define call_ifunc_resolver(ptr) \ 69 (((Elf_Addr (*)(uint32_t, uint32_t, uint64_t, uint64_t, uint64_t, \ 70 uint64_t, uint64_t, uint64_t))ptr)((uint32_t)cpu_features, \ 71 (uint32_t)cpu_features2, 0, 0, 0, 0, 0, 0)) 72 73 /* 74 * TLS 75 */ 76 77 #define round(size, align) \ 78 (((size) + (align) - 1) & ~((align) - 1)) 79 #define calculate_first_tls_offset(size, align, offset) \ 80 TLS_TCB_SIZE 81 #define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \ 82 round(prev_offset + prev_size, align) 83 #define calculate_tls_post_size(align) 0 84 85 typedef struct { 86 unsigned long ti_module; 87 unsigned long ti_offset; 88 } tls_index; 89 90 extern void *__tls_get_addr(tls_index* ti); 91 92 extern void powerpc64_abi_variant_hook(Elf_Auxinfo **); 93 #define md_abi_variant_hook(x) powerpc64_abi_variant_hook(x) 94 95 #endif 96