/*      $NetBSD: linux32_exec.h,v 1.2 2021/11/26 08:56:28 ryo Exp $     */

/*-
* Copyright (c) 2021 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ryo Shimizu.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

#ifndef _AARCH64_LINUX32_EXEC_H_
#define _AARCH64_LINUX32_EXEC_H_

#include <sys/exec_elf.h>

#define LINUX32_ELF_AUX_ENTRIES 20
#define LINUX32_PLATFORM        "v7l"

/* The extra data (ELF auxiliary table and platform name) on stack */
struct linux32_extra_stack_data {
       Aux32Info ai[LINUX32_ELF_AUX_ENTRIES];
       uint32_t randbytes[4];
       char hw_platform[8];    /* sizeof(LINUX32_PLATFORM) + align */
};

#define LINUX32_ELF_AUX_ARGSIZ  sizeof(struct linux32_extra_stack_data)

#define LINUX32_ARM_KUSER_HELPER_ADDR   0xffff0000
#define LINUX32_ARM_KUSER_HELPER_SIZE   0x00001000
/* avoid 0xffff0000-. linux/arm uses this area as kuser_helper */
#define LINUX32_USRSTACK        ((vaddr_t)0xfffef000)
#define LINUX32_MAXSSIZ         MAXSSIZ32       /* from machine/vmparam.h */

int linux32_exec_setup_stack(struct lwp *, struct exec_package *);

#define LINUX32_GO_RT0_SIGNATURE

#endif /* _AARCH64_LINUX32_EXEC_H_ */