linux_exec.h revision 1.8 
1/*	$NetBSD: linux_exec.h,v 1.8 2002/08/26 21:06:01 christos Exp $  */
2
3/*-
4 * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Emmanuel Dreyfus.
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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	     This product includes software developed by the NetBSD
21 *	     Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *	   contributors may be used to endorse or promote products derived
24 *	   from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#ifndef _POWERPC_LINUX_EXEC_H
40#define _POWERPC_LINUX_EXEC_H
41
42#include <sys/exec_aout.h>
43#include <sys/exec_elf.h>
44#include <sys/types.h>
45
46/*
47 * From Linux's include/asm-ppc/elf.h
48 */
49#define LINUX_ELF_HWCAP (0)
50
51/*
52 * From Linux's include/asm-ppc/param.h
53 */
54# define LINUX_CLOCKS_PER_SEC 100	/* frequency at which times() counts */
55
56/*
57 * Linux a.out format parameters
58 */
59#define LINUX_M_POWERPC		MID_POWERPC
60#define LINUX_MID_MACHINE	LINUX_M_POWERPC
61
62/*
63 * Linux Elf32 format parameters
64 */
65
66#define LINUX_GCC_SIGNATURE 1
67/*
68 * LINUX_ATEXIT_SIGNATURE enable the atexit_signature test. See
69 * sys/compat/linux/common/linux_exec_elf32.c:linux_atexit_signature()
70 */
71#define LINUX_ATEXIT_SIGNATURE	1
72
73/*
74 * LINUX_SHIFT enable the 16 bytes shift for arguments and ELF auxiliary
75 * table. This is needed on the PowerPC
76 */
77#define LINUX_SHIFT 0x0000000FUL
78
79/*
80 * LINUX_SP_WRAP enable the stack pointer wrap before Linux's ld.so
81 * transfers control to the Linux executable. It is set to the size
82 * of the stack pointer wrap code, which is defined in
83 * sys/compat/linux/arch/powerpc/linux_sp_wrap.S
84 */
85#define LINUX_SP_WRAP 0x30		/* Size of the stack pointer wrap code */
86
87/*
88 * Entries in the ELF auxiliary table. This is counted from
89 * sys/compat/linux/arc/powerpc/linux_exec_powerpc.c
90 */
91#define LINUX_ELF_AUX_ENTRIES 14
92
93/*
94 * Size of the auxiliary ELF table. On the PowerPC we need 16 extra bytes
95 * in order to force an alignement on a 16 bytes boundary (this is expected
96 * by PowerPC GNU ld.so). If we use LINUX_SP_WRAP, we also need some extra
97 * room for the sp_wrap_code.
98 */
99#ifdef LINUX_SP_WRAP
100#define LINUX_ELF_AUX_ARGSIZ \
101    ((howmany(ELF_AUX_ENTRIES * sizeof(LinuxAuxInfo), sizeof(Elf32_Addr))) \
102    + 16 + LINUX_SP_WRAP)
103#else
104#define LINUX_ELF_AUX_ARGSIZ \
105    ((howmany(ELF_AUX_ENTRIES * sizeof(LinuxAuxInfo), sizeof(Elf32_Addr))) + 16)
106#endif
107
108/* XXX should use ELFNAME2 */
109#define LINUX_COPYARGS_FUNCTION linux_elf32_copyargs
110
111typedef struct {
112	Elf32_Sword a_type;
113	Elf32_Word  a_v;
114} LinuxAux32Info;
115#define LinuxAuxInfo LinuxAux32Info
116
117/* NetBSD/powerpc doesn't use e_syscall, so use the default. */
118#define LINUX_SYSCALL_FUNCTION syscall
119
120#ifdef _KERNEL
121__BEGIN_DECLS
122int linux_elf32_copyargs __P((struct proc *, struct exec_package *,
123    struct ps_strings *, char **, void *));
124__END_DECLS
125#endif /* _KERNEL */
126#endif /* !_POWERPC_LINUX_EXEC_H */
127