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 #define rtld_dynamic(obj) (&_DYNAMIC) 41 42 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 43 const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj, 44 const Elf_Rel *rel); 45 void reloc_non_plt_self(Elf_Dyn *dynp, Elf_Addr relocbase); 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 u_long cpu_features; /* r3 */ 57 extern u_long cpu_features2; /* r4 */ 58 /* r5-10: ifunc resolver parameters reserved for future assignment. */ 59 #define call_ifunc_resolver(ptr) \ 60 (((Elf_Addr (*)(uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, \ 61 uint32_t, uint32_t, uint32_t))ptr)((uint32_t)cpu_features, \ 62 (uint32_t)cpu_features2, 0, 0, 0, 0, 0, 0)) 63 64 /* 65 * PLT functions. Not really correct prototypes, but the 66 * symbol values are needed. 67 */ 68 void _rtld_powerpc_pltlongresolve(void); 69 void _rtld_powerpc_pltresolve(void); 70 void _rtld_powerpc_pltcall(void); 71 72 /* 73 * TLS 74 */ 75 76 #define TLS_TP_OFFSET 0x7000 77 #define TLS_DTV_OFFSET 0x8000 78 #define TLS_TCB_SIZE 8 79 80 #define round(size, align) \ 81 (((size) + (align) - 1) & ~((align) - 1)) 82 #define calculate_first_tls_offset(size, align) \ 83 TLS_TCB_SIZE 84 #define calculate_tls_offset(prev_offset, prev_size, size, align) \ 85 round(prev_offset + prev_size, align) 86 #define calculate_tls_end(off, size) ((off) + (size)) 87 #define calculate_tls_post_size(align) 0 88 89 typedef struct { 90 unsigned long ti_module; 91 unsigned long ti_offset; 92 } tls_index; 93 94 extern void *__tls_get_addr(tls_index* ti); 95 96 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 97 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 98 99 extern void powerpc_abi_variant_hook(Elf_Auxinfo **); 100 #define md_abi_variant_hook(x) powerpc_abi_variant_hook(x) 101 102 #endif 103