/* * Compat system call wrappers * * Copyright (C) 2012 ARM Ltd. * Authors: Will Deacon <will.deacon@arm.com> *	    Catalin Marinas <catalin.marinas@arm.com> * * 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 <http://www.gnu.org/licenses/>. */ #include <linux/linkage.h> #include <asm/assembler.h>#include <asm/asm-offsets.h> /* * System call wrappers for the AArch32 compatibility layer. */ compat_sys_sigreturn_wrapper:	mov	x0, sp	mov	x27, #0		// prevent syscall restart handling (why)	b	compat_sys_sigreturnENDPROC(compat_sys_sigreturn_wrapper) compat_sys_rt_sigreturn_wrapper:	mov	x0, sp	mov	x27, #0		// prevent syscall restart handling (why)	b	compat_sys_rt_sigreturnENDPROC(compat_sys_rt_sigreturn_wrapper) compat_sys_statfs64_wrapper:	mov	w3, #84	cmp	w1, #88	csel	w1, w3, w1, eq	b	compat_sys_statfs64ENDPROC(compat_sys_statfs64_wrapper) compat_sys_fstatfs64_wrapper:	mov	w3, #84	cmp	w1, #88	csel	w1, w3, w1, eq	b	compat_sys_fstatfs64ENDPROC(compat_sys_fstatfs64_wrapper) /* * Wrappers for AArch32 syscalls that either take 64-bit parameters * in registers or that take 32-bit parameters which require sign * extension. */compat_sys_pread64_wrapper:	regs_to_64	x3, x4, x5	b	sys_pread64ENDPROC(compat_sys_pread64_wrapper) compat_sys_pwrite64_wrapper:	regs_to_64	x3, x4, x5	b	sys_pwrite64ENDPROC(compat_sys_pwrite64_wrapper) compat_sys_truncate64_wrapper:	regs_to_64	x1, x2, x3	b	sys_truncateENDPROC(compat_sys_truncate64_wrapper) compat_sys_ftruncate64_wrapper:	regs_to_64	x1, x2, x3	b	sys_ftruncateENDPROC(compat_sys_ftruncate64_wrapper) compat_sys_readahead_wrapper:	regs_to_64	x1, x2, x3	mov	w2, w4	b	sys_readaheadENDPROC(compat_sys_readahead_wrapper) compat_sys_fadvise64_64_wrapper:	mov	w6, w1	regs_to_64	x1, x2, x3	regs_to_64	x2, x4, x5	mov	w3, w6	b	sys_fadvise64_64ENDPROC(compat_sys_fadvise64_64_wrapper) compat_sys_sync_file_range2_wrapper:	regs_to_64	x2, x2, x3	regs_to_64	x3, x4, x5	b	sys_sync_file_range2ENDPROC(compat_sys_sync_file_range2_wrapper) compat_sys_fallocate_wrapper:	regs_to_64	x2, x2, x3	regs_to_64	x3, x4, x5	b	sys_fallocateENDPROC(compat_sys_fallocate_wrapper) #undef __SYSCALL#define __SYSCALL(x, y)		.quad	y	// x /* * The system calls table must be 4KB aligned. */	.align	12ENTRY(compat_sys_call_table)#include <asm/unistd32.h>