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 struct Struct_Obj_Entry; 36 37 /* Return the address of the .dynamic section in the dynamic linker. */ 38 #define rtld_dynamic(obj) (&_DYNAMIC) 39 40 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target, 41 const struct Struct_Obj_Entry *defobj, 42 const struct Struct_Obj_Entry *obj, 43 const Elf_Rel *rel); 44 45 #define make_function_pointer(def, defobj) \ 46 ((defobj)->relocbase + (def)->st_value) 47 48 #define call_initfini_pointer(obj, target) \ 49 (((InitFunc)(target))()) 50 51 #define call_init_pointer(obj, target) \ 52 (((InitArrFunc)(target))(main_argc, main_argv, environ)) 53 54 /* 55 * Lazy binding entry point, called via PLT. 56 */ 57 void _rtld_bind_start(void); 58 59 /* 60 * TLS 61 */ 62 63 #define TLS_TP_OFFSET 0x7000 64 #define TLS_DTV_OFFSET 0x8000 65 #define TLS_TCB_SIZE 16 66 67 #define round(size, align) \ 68 (((size) + (align) - 1) & ~((align) - 1)) 69 #define calculate_first_tls_offset(size, align) \ 70 round(16, align) 71 #define calculate_tls_offset(prev_offset, prev_size, size, align) \ 72 round(prev_offset + prev_size, align) 73 #define calculate_tls_end(off, size) ((off) + (size)) 74 75 typedef struct { 76 unsigned long ti_module; 77 unsigned long ti_offset; 78 } tls_index; 79 80 extern void *__tls_get_addr(tls_index* ti); 81 82 #define RTLD_DEFAULT_STACK_PF_EXEC PF_X 83 #define RTLD_DEFAULT_STACK_EXEC PROT_EXEC 84 85 #endif 86