1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1993 Paul Kranenburg 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Paul Kranenburg. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 35 /* 36 * RRS section definitions. 37 * 38 * The layout of some data structures defined in this header file is 39 * such that we can provide compatibility with the SunOS 4.x shared 40 * library scheme. 41 */ 42 43 #ifndef _SYS_LINK_ELF_H_ 44 #define _SYS_LINK_ELF_H_ 45 46 #include <sys/elf.h> 47 48 /* 49 * Flags that describe the origin of the entries in Dl_serinfo. 50 * SunOS has these in <sys/link.h>, we follow the suit. 51 */ 52 #define LA_SER_ORIG 0x01 /* original (needed) name */ 53 #define LA_SER_LIBPATH 0x02 /* LD_LIBRARY_PATH entry prepended */ 54 #define LA_SER_RUNPATH 0x04 /* runpath entry prepended */ 55 #define LA_SER_CONFIG 0x08 /* configuration entry prepended */ 56 #define LA_SER_DEFAULT 0x40 /* default path prepended */ 57 #define LA_SER_SECURE 0x80 /* default (secure) path prepended */ 58 59 typedef struct link_map { 60 caddr_t l_base; /* Base Address of library */ 61 #ifdef __mips__ 62 caddr_t l_xxx; /* unused */ 63 #endif 64 const char *l_name; /* Absolute Path to Library */ 65 const void *l_ld; /* Pointer to .dynamic in memory */ 66 struct link_map *l_next, *l_prev; /* linked list of of mapped libs */ 67 caddr_t l_addr; /* Load Offset of library */ 68 const char *l_refname; /* object we are filtering for */ 69 } Link_map; 70 71 struct r_debug { 72 int r_version; /* Currently '1' */ 73 struct link_map *r_map; /* list of loaded images */ 74 void (*r_brk)(struct r_debug *, struct link_map *); 75 /* pointer to break point */ 76 enum { 77 RT_CONSISTENT, /* things are stable */ 78 RT_ADD, /* adding a shared library */ 79 RT_DELETE /* removing a shared library */ 80 } r_state; 81 void *r_ldbase; /* Base address of rtld */ 82 }; 83 84 #define R_DEBUG_VERSION 1 85 86 struct dl_phdr_info 87 { 88 Elf_Addr dlpi_addr; /* module relocation base */ 89 const char *dlpi_name; /* module name */ 90 const Elf_Phdr *dlpi_phdr; /* pointer to module's phdr */ 91 Elf_Half dlpi_phnum; /* number of entries in phdr */ 92 unsigned long long int dlpi_adds; /* total # of loads */ 93 unsigned long long int dlpi_subs; /* total # of unloads */ 94 size_t dlpi_tls_modid; 95 void *dlpi_tls_data; 96 }; 97 98 __BEGIN_DECLS 99 100 typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *); 101 extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *); 102 int _rtld_addr_phdr(const void *, struct dl_phdr_info *); 103 int _rtld_get_stack_prot(void); 104 int _rtld_is_dlopened(void *); 105 106 #ifdef __ARM_EABI__ 107 void * dl_unwind_find_exidx(const void *, int *); 108 #endif 109 110 __END_DECLS 111 112 #endif /* _SYS_LINK_ELF_H_ */ 113