From 7992d60dc46576bc6f6429d87f313462141db6d2 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Mon, 5 Mar 2012 11:49:31 +0000 Subject: arm64: System calls handling This patch adds support for system calls coming from 64-bit applications. It uses the asm-generic/unistd.h definitions with the canonical set of system calls. The private system calls are only used for 32-bit (compat) applications as 64-bit ones can set the TLS and flush the caches entirely from user space. The sys_call_table is just an array defined in a C file and it contains pointers to the syscall functions. The array is 4KB aligned to allow the use of the ADRP instruction (longer range ADR) in entry.S. Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas Acked-by: Tony Lindgren Acked-by: Nicolas Pitre Acked-by: Olof Johansson Acked-by: Santosh Shilimkar --- arch/arm64/include/asm/syscalls.h | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 arch/arm64/include/asm/syscalls.h (limited to 'arch/arm64/include/asm/syscalls.h') diff --git a/arch/arm64/include/asm/syscalls.h b/arch/arm64/include/asm/syscalls.h new file mode 100644 index 0000000..09ff335 --- /dev/null +++ b/arch/arm64/include/asm/syscalls.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#ifndef __ASM_SYSCALLS_H +#define __ASM_SYSCALLS_H + +#include +#include +#include + +/* + * System call wrappers implemented in kernel/entry.S. + */ +asmlinkage long sys_execve_wrapper(const char __user *filename, + const char __user *const __user *argv, + const char __user *const __user *envp); +asmlinkage long sys_clone_wrapper(unsigned long clone_flags, + unsigned long newsp, + void __user *parent_tid, + unsigned long tls_val, + void __user *child_tid); +asmlinkage long sys_rt_sigreturn_wrapper(void); +asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss, + stack_t __user *uoss); + +#include + +#endif /* __ASM_SYSCALLS_H */ -- cgit v1.1