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      1 /*	$NetBSD: linux32_exec.h,v 1.2 2021/11/26 08:56:28 ryo Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Ryo Shimizu.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _AARCH64_LINUX32_EXEC_H_
     33 #define _AARCH64_LINUX32_EXEC_H_
     34 
     35 #include <sys/exec_elf.h>
     36 
     37 #define LINUX32_ELF_AUX_ENTRIES	20
     38 #define LINUX32_PLATFORM	"v7l"
     39 
     40 /* The extra data (ELF auxiliary table and platform name) on stack */
     41 struct linux32_extra_stack_data {
     42 	Aux32Info ai[LINUX32_ELF_AUX_ENTRIES];
     43 	uint32_t randbytes[4];
     44 	char hw_platform[8];	/* sizeof(LINUX32_PLATFORM) + align */
     45 };
     46 
     47 #define LINUX32_ELF_AUX_ARGSIZ	sizeof(struct linux32_extra_stack_data)
     48 
     49 #define LINUX32_ARM_KUSER_HELPER_ADDR	0xffff0000
     50 #define LINUX32_ARM_KUSER_HELPER_SIZE	0x00001000
     51 /* avoid 0xffff0000-. linux/arm uses this area as kuser_helper */
     52 #define LINUX32_USRSTACK	((vaddr_t)0xfffef000)
     53 #define LINUX32_MAXSSIZ		MAXSSIZ32	/* from machine/vmparam.h */
     54 
     55 int linux32_exec_setup_stack(struct lwp *, struct exec_package *);
     56 
     57 #define LINUX32_GO_RT0_SIGNATURE
     58 
     59 #endif /* _AARCH64_LINUX32_EXEC_H_ */
     60