Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * AArch64-specific system calls implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2012 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Author: Catalin Marinas <catalin.marinas@arm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/cpufeature.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		unsigned long, prot, unsigned long, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		unsigned long, fd, unsigned long, off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	if (offset_in_page(off) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	if (personality(personality) == PER_LINUX32 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		!system_supports_32bit_el0())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	return ksys_personality(personality);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) asmlinkage long sys_ni_syscall(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	return sys_ni_syscall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)  * Wrappers to pass the pt_regs argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define __arm64_sys_personality		__arm64_sys_arm64_personality
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #undef __SYSCALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define __SYSCALL(nr, sym)	asmlinkage long __arm64_##sym(const struct pt_regs *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #undef __SYSCALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define __SYSCALL(nr, sym)	[nr] = __arm64_##sym,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) const syscall_fn_t sys_call_table[__NR_syscalls] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	[0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };