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 #include <machine/tls.h> 37 38 struct Struct_Obj_Entry; 39 40 /* Return the address of the .dynamic section in the dynamic linker. */ 41 #define rtld_dynamic(obj) (&_DYNAMIC) 42 43 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 44 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 45 const Elf_Rel *rel); 46 void reloc_non_plt_self(Elf_Dyn *dynp, Elf_Addr relocbase); 47 48 #define make_function_pointer(def, defobj) \ 49 ((defobj)->relocbase + (def)->st_value) 50 51 #define call_initfini_pointer(obj, target) \ 52 (((InitFunc)(target))()) 53 54 #define call_init_pointer(obj, target) \ 55 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 56 57 extern u_long cpu_features; /* r3 */ 58 extern u_long cpu_features2; /* r4 */ 59 /* r5-10: ifunc resolver parameters reserved for future assignment. */ 60 #define call_ifunc_resolver(ptr) \ 61 (((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, \ 62 uint32_t, uint32_t, uint32_t))ptr)((uint32_t)cpu_features, \ 63 (uint32_t)cpu_features2, 0, 0, 0, 0, 0, 0)) 64 65 /* 66 * PLT functions. Not really correct prototypes, but the 67 * symbol values are needed. 68 */ 69 void _rtld_powerpc_pltlongresolve(void); 70 void _rtld_powerpc_pltresolve(void); 71 void _rtld_powerpc_pltcall(void); 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 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 93 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 94 95 extern void powerpc_abi_variant_hook(Elf_Auxinfo **); 96 #define md_abi_variant_hook(x) powerpc_abi_variant_hook(x) 97 98 #endif 99