7992d60dc4
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 <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_SYSCALLS_H
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#define __ASM_SYSCALLS_H
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#include <linux/linkage.h>
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#include <linux/compiler.h>
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#include <linux/signal.h>
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/*
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* System call wrappers implemented in kernel/entry.S.
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*/
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asmlinkage long sys_execve_wrapper(const char __user *filename,
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const char __user *const __user *argv,
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const char __user *const __user *envp);
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asmlinkage long sys_clone_wrapper(unsigned long clone_flags,
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unsigned long newsp,
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void __user *parent_tid,
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unsigned long tls_val,
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void __user *child_tid);
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asmlinkage long sys_rt_sigreturn_wrapper(void);
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asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss,
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stack_t __user *uoss);
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#include <asm-generic/syscalls.h>
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#endif /* __ASM_SYSCALLS_H */
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