libexec/rtld-elf/arm/rtld_machdep.h

   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   32
  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,
  44                        const struct Struct_Obj_Entry *obj,
  45                        const Elf_Rel *rel);
  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 typedef struct {
  54         unsigned long ti_module;
  55         unsigned long ti_offset;
  56 } tls_index;
  57
  58 #define round(size, align) \
  59         (((size) + (align) - 1) & ~((align) - 1))
  60 #define calculate_first_tls_offset(size, align) \
  61         round(size, align)
  62 #define calculate_tls_offset(prev_offset, prev_size, size, align) \
  63             round(prev_offset + prev_size, align)
  64 #define calculate_tls_end(off, size)    ((off) + (size))
  65
  66
  67 /*
  68  * Lazy binding entry point, called via PLT.
  69  */
  70 void _rtld_bind_start(void);
  71
  72 extern void *__tls_get_addr(tls_index *ti);
  73
  74 #endif