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| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2024 Xi Ruoyao <xry111@xry111.site>. All Rights Reserved. |
| 4 | */ |
| 5 | #ifndef __ASM_VDSO_GETRANDOM_H |
| 6 | #define __ASM_VDSO_GETRANDOM_H |
| 7 | |
| 8 | #ifndef __ASSEMBLER__ |
| 9 | |
| 10 | #include <asm/unistd.h> |
| 11 | #include <asm/vdso/vdso.h> |
| 12 | |
| 13 | static __always_inline ssize_t getrandom_syscall(void *_buffer, size_t _len, unsigned int _flags) |
| 14 | { |
| 15 | register long ret asm("a0"); |
| 16 | register long nr asm("a7") = __NR_getrandom; |
| 17 | register void *buffer asm("a0") = _buffer; |
| 18 | register size_t len asm("a1") = _len; |
| 19 | register unsigned int flags asm("a2") = _flags; |
| 20 | |
| 21 | asm volatile( |
| 22 | " syscall 0\n" |
| 23 | : "=r" (ret) |
| 24 | : "r" (nr), "r" (buffer), "r" (len), "r" (flags) |
| 25 | : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", |
| 26 | "memory"); |
| 27 | |
| 28 | return ret; |
| 29 | } |
| 30 | |
| 31 | #endif /* !__ASSEMBLER__ */ |
| 32 | |
| 33 | #endif /* __ASM_VDSO_GETRANDOM_H */ |
| 34 |
Warning: This file is not a C or C++ file. It does not have highlighting.