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      1 /*	$NetBSD: linux32_exec.h,v 1.10 2021/11/26 08:56:28 ryo Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Emmanuel Dreyfus
     17  * 4. The name of the author may not be used to endorse or promote
     18  *    products derived from this software without specific prior written
     19  *    permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
     22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 #ifndef _AMD64_LINUX32_EXEC_H
     34 #define _AMD64_LINUX32_EXEC_H
     35 
     36 #include <sys/exec_elf.h>
     37 
     38 #define LINUX32_M_I386		100
     39 #define LINUX32_MID_MACHINE	LINUX_M_I386
     40 #define LINUX32_USRSTACK	0xC0000000
     41 
     42 #define LINUX32_DEBUGLINK_SIGNATURE	1
     43 #define LINUX32_GO_RT0_SIGNATURE	1
     44 
     45 /* Counted from common/linux32_exec_elf32.c */
     46 #define LINUX32_ELF_AUX_ENTRIES	20
     47 
     48 /* Hardware platform identifier string */
     49 #define LINUX32_PLATFORM "i686"
     50 
     51 #define LINUX32_CPUCAP (cpu_feature[0])
     52 
     53 #if 0
     54 /* vsyscall assembly */
     55 static char linux32_kernel_vsyscall[] = {
     56 	0x55,				/* push   %ebp */		\
     57 	0x89, 0xcd,			/* mov    %ecx,%ebp */ 		\
     58 	0x0f, 0x05,			/* syscall */			\
     59 	0xb9, 0x7b, 0x00, 0x00, 0x00,	/* mov    $0x7b,%ecx */		\
     60 	0x8e, 0xd1,			/* movl   %ecx,%ss */		\
     61 	0x89, 0xe9,			/* mov    %ebp,%ecx */		\
     62 	0x5d,				/* pop    %ebp */		\
     63 	0xc3,				/* ret */			\
     64 };
     65 #endif
     66 
     67 /* The extra data (ELF auxiliary table and platform name) on stack */
     68 struct linux32_extra_stack_data {
     69 	Aux32Info ai[LINUX32_ELF_AUX_ENTRIES];
     70 	uint32_t randbytes[4];
     71 	char hw_platform[8];	/* sizeof(LINUX32_PLATFORM) + align */
     72 #if 0 /* notyet */
     73 	Elf32_Ehdr elfhdr;
     74 	char kernel_vsyscall[sizeof(linux32_kernel_vsyscall)];
     75 #endif
     76 };
     77 
     78 #define LINUX32_ELF_AUX_ARGSIZ sizeof(struct linux32_extra_stack_data)
     79 
     80 #define linux32_exec_setup_stack	linux_exec_setup_stack
     81 
     82 #endif /* !_AMD64_LINUX32_EXEC_H */
     83