linux_exec.h revision 1.5 
1/*	$NetBSD: linux_exec.h,v 1.5 2001/08/30 20:41:36 manu 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#include <sys/systm.h>
46
47/*
48 * From Linux's include/asm-ppc/elf.h
49 */
50#define LINUX_ELF_HWCAP (0)
51
52/*
53 * From Linux's include/asm-ppc/param.h
54 */
55# define LINUX_CLOCKS_PER_SEC 100	/* frequency at which times() counts */
56
57/*
58 * Linux a.out format parameters
59 */
60#define LINUX_M_POWERPC		MID_POWERPC
61#define LINUX_MID_MACHINE	LINUX_M_POWERPC
62
63/*
64 * Linux Elf32 format parameters
65 */
66
67#define LINUX_GCC_SIGNATURE 1
68/*
69 * LINUX_ATEXIT_SIGNATURE enable the atexit_signature test. See
70 * sys/compat/linux/common/linux_exec_elf32.c:linux_atexit_signature()
71 */
72#define LINUX_ATEXIT_SIGNATURE	1
73
74/*
75 * LINUX_SHIFT enable the 16 bytes shift for arguments and ELF auxiliary
76 * table. This is needed on the PowerPC
77 */
78#define LINUX_SHIFT 0x0000000FUL
79
80/*
81 * LINUX_SP_WRAP enable the stack pointer wrap before Linux's ld.so
82 * transfers control to the Linux executable. It is set to the size
83 * of the stack pointer wrap code, which is defined in
84 * sys/compat/linux/arch/powerpc/linux_sp_wrap.S
85 */
86#define LINUX_SP_WRAP 0x30		/* Size of the stack pointer wrap code */
87
88/*
89 * Entries in the ELF auxiliary table. This is counted from
90 * sys/compat/linux/arc/powerpc/linux_exec_powerpc.c
91 */
92#define LINUX_ELF_AUX_ENTRIES 14
93
94/*
95 * Size of the auxiliary ELF table. On the PowerPC we need 16 extra bytes
96 * in order to force an alignement on a 16 bytes boundary (this is expected
97 * by PowerPC GNU ld.so). If we use LINUX_SP_WRAP, we also need some extra
98 * room for the sp_wrap_code.
99 */
100#ifdef LINUX_SP_WRAP
101#define LINUX_ELF_AUX_ARGSIZ \
102    ((howmany(ELF_AUX_ENTRIES * sizeof(LinuxAuxInfo), sizeof(Elf32_Addr))) \
103    + 16 + LINUX_SP_WRAP)
104#else
105#define LINUX_ELF_AUX_ARGSIZ \
106    ((howmany(ELF_AUX_ENTRIES * sizeof(LinuxAuxInfo), sizeof(Elf32_Addr))) + 16)
107#endif
108
109/* XXX should use ELFNAME2 */
110#define LINUX_COPYARGS_FUNCTION linux_elf32_copyargs
111
112typedef struct {
113	Elf32_Sword a_type;
114	Elf32_Word  a_v;
115} LinuxAux32Info;
116#define LinuxAuxInfo LinuxAux32Info
117
118#ifdef _KERNEL
119__BEGIN_DECLS
120int linux_elf32_copyargs __P((struct exec_package *,
121    struct ps_strings *, char **, void *));
122__END_DECLS
123#endif /* _KERNEL */
124
125#endif /* !_POWERPC_LINUX_EXEC_H */
126