mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 02:26:57 +07:00
529d235a0e
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>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
|
|
* 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().
|
|
*
|
|
* Copyright © IBM Corporation
|
|
*
|
|
* 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
|
|
#define PPC64ONLY(func) __NR_##func
|
|
#else
|
|
#define OLDSYS(func) __NR_old##func
|
|
#define SYS32ONLY(func) __NR_##func
|
|
#define PPC64ONLY(func) -1
|
|
#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>
|
|
END_TABLE __NR_syscalls
|