xref: /freebsd/libexec/rtld-elf/powerpc/rtld_machdep.h (revision b9dea67f)

/*-
 * Copyright (c) 1999, 2000 John D. Polstra.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef RTLD_MACHDEP_H
#define RTLD_MACHDEP_H	1

#include <machine/atomic.h>

#define	atomic_incr_int(p)	atomic_add_int((p), 1)
#define	atomic_decr_int(p)	atomic_subtract_int((p), 1)

#define CACHE_LINE_SIZE	  32

struct Struct_Obj_Entry;

/* Return the address of the .dynamic section in the dynamic linker. */
#define rtld_dynamic(obj)    (&_DYNAMIC)

Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
		       const struct Struct_Obj_Entry *defobj,
		       const struct Struct_Obj_Entry *obj,
		       const Elf_Rel *rel);

#define make_function_pointer(def, defobj) \
	((defobj)->relocbase + (def)->st_value)

#define call_initfini_pointer(obj, target) \
	(((InitFunc)(target))())

/*
 * Lazy binding entry point, called via PLT.
 */
void _rtld_bind_start(void);

/*
 * PLT functions. Not really correct prototypes, but the
 * symbol values are needed.
 */
void _rtld_powerpc_pltresolve(void);
void _rtld_powerpc_pltcall(void);

#endif