| 1 | |
| 2 | |
| 3 | * AArch64-specific system calls implementation
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| 4 | *
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| 5 | * Copyright (C) 2012 ARM Ltd.
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| 6 | * Author: Catalin Marinas <[email protected]>
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| 7 |
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| 8 |
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| 9 | #include <linux/compiler.h>
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| 10 | #include <linux/errno.h>
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| 11 | #include <linux/fs.h>
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| 12 | #include <linux/mm.h>
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| 13 | #include <linux/export.h>
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| 14 | #include <linux/sched.h>
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| 15 | #include <linux/slab.h>
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| 16 | #include <linux/syscalls.h>
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| 17 |
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| 18 | #include <asm/cpufeature.h>
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| 19 | #include <asm/syscall.h>
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| 20 |
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| 21 | SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
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| 22 | unsigned long, prot, unsigned long, flags,
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| 23 | unsigned long, fd, unsigned long, off)
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| 24 | {
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| 25 | if (offset_in_page(off) != 0)
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| 26 | return -EINVAL;
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| 27 |
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| 28 | return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
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| 29 | }
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| 30 |
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| 31 | SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
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| 32 | {
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| 33 | if (personality(personality) == PER_LINUX32 &&
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| 34 | !system_supports_32bit_el0())
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| 35 | return -EINVAL;
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| 36 | return ksys_personality(personality);
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| 37 | }
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| 38 |
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| 39 | asmlinkage long sys_ni_syscall(void);
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| 40 |
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| 41 | asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused)
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| 42 | {
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| 43 | return sys_ni_syscall();
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| 44 | }
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| 45 |
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| 46 | |
| 47 | * Wrappers to pass the pt_regs argument.
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| 48 |
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| 49 | #define __arm64_sys_personality __arm64_sys_arm64_personality
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| 50 |
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| 51 | #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
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| 52 |
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| 53 | #undef __SYSCALL
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| 54 | #define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
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| 55 | #include <asm/syscall_table_64.h>
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| 56 |
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| 57 | #undef __SYSCALL
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| 58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
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| 59 |
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| 60 | const syscall_fn_t sys_call_table[__NR_syscalls] = {
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| 61 | [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall,
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| 62 | #include <asm/syscall_table_64.h>
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| 63 | };
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