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 #define CACHE_LINE_SIZE 64 36 37 struct Struct_Obj_Entry; 38 39 /* Return the address of the .dynamic section in the dynamic linker. */ 40 #define rtld_dynamic(obj) \ 41 ((const Elf_Dyn *)((obj)->relocbase + (Elf_Addr)&_DYNAMIC)) 42 43 /* Fixup the jump slot at "where" to transfer control to "target". */ 44 static inline Elf_Addr 45 reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 46 const struct Struct_Obj_Entry *obj, 47 const struct Struct_Obj_Entry *refobj, const Elf_Rel *rel) 48 { 49 #ifdef dbg 50 dbg("reloc_jmpslot: *%p = %p", (void *)(where), 51 (void *)(target)); 52 #endif 53 (*(Elf_Addr *)(where) = (Elf_Addr)(target)); 54 return target; 55 } 56 57 #define make_function_pointer(def, defobj) \ 58 ((defobj)->relocbase + (def)->st_value) 59 60 #define call_initfini_pointer(obj, target) \ 61 (((InitFunc)(target))()) 62 63 #define call_init_pointer(obj, target) \ 64 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 65 66 #define round(size, align) \ 67 (((size) + (align) - 1) & ~((align) - 1)) 68 #define calculate_first_tls_offset(size, align) \ 69 round(size, align) 70 #define calculate_tls_offset(prev_offset, prev_size, size, align) \ 71 round((prev_offset) + (size), align) 72 #define calculate_tls_end(off, size) (off) 73 74 typedef struct { 75 unsigned long ti_module; 76 unsigned long ti_offset; 77 } tls_index; 78 79 struct tls_tcb; 80 81 extern void *__tls_get_addr(tls_index *ti); 82 extern void *__tls_get_addr_tcb(struct tls_tcb *tcb, tls_index *ti); 83 84 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 85 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 86 87 #endif 88