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/*
* This file , when run through CPP produces a list of syscall numbers
* in the order of systbl . h . That way we can check for gaps and syscalls
* that are out of order .
*
* Unfortunately , we cannot check for the correct ordering of entries
* using SYSX ( ) .
*
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* Copyright © IBM Corporation
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*
* This program is free software ; you can redistribute it and / or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation ; either version
* 2 of the License , or ( at your option ) any later version .
*/
# include <asm/unistd.h>
# define SYSCALL(func) __NR_##func
# define COMPAT_SYS(func) __NR_##func
# define PPC_SYS(func) __NR_##func
# ifdef CONFIG_PPC64
# define OLDSYS(func) -1
# define SYS32ONLY(func) -1
powerpc: Add a proper syscall for switching endianness
We currently have a "special" syscall for switching endianness. This is
syscall number 0x1ebe, which is handled explicitly in the 64-bit syscall
exception entry.
That has a few problems, firstly the syscall number is outside of the
usual range, which confuses various tools. For example strace doesn't
recognise the syscall at all.
Secondly it's handled explicitly as a special case in the syscall
exception entry, which is complicated enough without it.
As a first step toward removing the special syscall, we need to add a
regular syscall that implements the same functionality.
The logic is simple, it simply toggles the MSR_LE bit in the userspace
MSR. This is the same as the special syscall, with the caveat that the
special syscall clobbers fewer registers.
This version clobbers r9-r12, XER, CTR, and CR0-1,5-7.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-28 21:35:16 +11:00
# define PPC64ONLY(func) __NR_##func
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# else
# define OLDSYS(func) __NR_old##func
# define SYS32ONLY(func) __NR_##func
powerpc: Add a proper syscall for switching endianness
We currently have a "special" syscall for switching endianness. This is
syscall number 0x1ebe, which is handled explicitly in the 64-bit syscall
exception entry.
That has a few problems, firstly the syscall number is outside of the
usual range, which confuses various tools. For example strace doesn't
recognise the syscall at all.
Secondly it's handled explicitly as a special case in the syscall
exception entry, which is complicated enough without it.
As a first step toward removing the special syscall, we need to add a
regular syscall that implements the same functionality.
The logic is simple, it simply toggles the MSR_LE bit in the userspace
MSR. This is the same as the special syscall, with the caveat that the
special syscall clobbers fewer registers.
This version clobbers r9-r12, XER, CTR, and CR0-1,5-7.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-28 21:35:16 +11:00
# define PPC64ONLY(func) -1
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# endif
# define SYSX(f, f3264, f32) -1
# define SYSCALL_SPU(func) SYSCALL(func)
# define COMPAT_SYS_SPU(func) COMPAT_SYS(func)
# define PPC_SYS_SPU(func) PPC_SYS(func)
# define SYSX_SPU(f, f3264, f32) SYSX(f, f3264, f32)
/* Just insert a marker for ni_syscalls */
# define __NR_ni_syscall -1
/*
* These are the known exceptions .
* Hopefully , there will be no more .
*/
# define __NR_llseek __NR__llseek
# undef __NR_umount
# define __NR_umount __NR_umount2
# define __NR_old_getrlimit __NR_getrlimit
# define __NR_newstat __NR_stat
# define __NR_newlstat __NR_lstat
# define __NR_newfstat __NR_fstat
# define __NR_newuname __NR_uname
# define __NR_sysctl __NR__sysctl
# define __NR_olddebug_setcontext __NR_sys_debug_setcontext
/* We call sys_ugetrlimit for syscall number __NR_getrlimit */
# define getrlimit ugetrlimit
START_TABLE
# include <asm/systbl.h>
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END_TABLE NR_syscalls
