| 1 |
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| 2 | |
| 3 | * syscall_wrapper.h - arm64 specific wrappers to syscall definitions
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| 4 | *
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| 5 | * Based on arch/x86/include/asm_syscall_wrapper.h
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| 6 |
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| 7 |
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| 8 | #ifndef __ASM_SYSCALL_WRAPPER_H
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| 9 | #define __ASM_SYSCALL_WRAPPER_H
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| 10 |
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| 11 | #include <asm/ptrace.h>
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| 12 |
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| 13 | #ifdef CONFIG_COMPAT
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| 14 |
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| 15 | #define COMPAT_SC_ARM64_REGS_TO_ARGS(x, ...) \
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| 16 | __MAP(x,__SC_ARGS \
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| 17 | ,,regs->regs[0],,regs->regs[1],,regs->regs[2] \
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| 18 | ,,regs->regs[3],,regs->regs[4],,regs->regs[5])
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| 19 |
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| 20 | #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
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| 21 | asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs); \
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| 22 | ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO); \
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| 23 | static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
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| 24 | static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
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| 25 | asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs) \
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| 26 | { \
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| 27 | return __se_compat_sys##name(COMPAT_SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
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| 28 | } \
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| 29 | static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
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| 30 | { \
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| 31 | return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
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| 32 | } \
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| 33 | static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
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| 34 |
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| 35 | #define COMPAT_SYSCALL_DEFINE0(sname) \
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| 36 | asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused); \
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| 37 | ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \
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| 38 | asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused)
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| 39 |
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| 40 | #define COND_SYSCALL_COMPAT(name) \
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| 41 | asmlinkage long __arm64_compat_sys_##name(const struct pt_regs *regs); \
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| 42 | asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \
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| 43 | { \
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| 44 | return sys_ni_syscall(); \
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| 45 | }
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| 46 |
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| 47 | #endif
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| 48 |
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| 49 | #define SC_ARM64_REGS_TO_ARGS(x, ...) \
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| 50 | __MAP(x,__SC_ARGS \
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| 51 | ,,regs->orig_x0,,regs->regs[1],,regs->regs[2] \
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| 52 | ,,regs->regs[3],,regs->regs[4],,regs->regs[5])
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| 53 |
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| 54 | #define __SYSCALL_DEFINEx(x, name, ...) \
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| 55 | asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \
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| 56 | ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \
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| 57 | static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
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| 58 | static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
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| 59 | asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \
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| 60 | { \
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| 61 | return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
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| 62 | } \
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| 63 | static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
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| 64 | { \
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| 65 | long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
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| 66 | __MAP(x,__SC_TEST,__VA_ARGS__); \
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| 67 | __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
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| 68 | return ret; \
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| 69 | } \
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| 70 | static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
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| 71 |
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| 72 | #define SYSCALL_DEFINE0(sname) \
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| 73 | SYSCALL_METADATA(_##sname, 0); \
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| 74 | asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused); \
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| 75 | ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \
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| 76 | asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
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| 77 |
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| 78 | #define COND_SYSCALL(name) \
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| 79 | asmlinkage long __arm64_sys_##name(const struct pt_regs *regs); \
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| 80 | asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \
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| 81 | { \
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| 82 | return sys_ni_syscall(); \
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| 83 | }
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| 84 |
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| 85 | asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused);
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| 86 |
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| 87 | #endif
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