1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2025 Xi Ruoyao <xry111@xry111.site>. All Rights Reserved. 4 */ 5 #ifndef __ASM_VDSO_GETRANDOM_H 6 #define __ASM_VDSO_GETRANDOM_H 7 8 #ifndef __ASSEMBLY__ 9 10 #include <asm/unistd.h> 11 getrandom_syscall(void * _buffer,size_t _len,unsigned int _flags)12static __always_inline ssize_t getrandom_syscall(void *_buffer, size_t _len, unsigned int _flags) 13 { 14 register long ret asm("a0"); 15 register long nr asm("a7") = __NR_getrandom; 16 register void *buffer asm("a0") = _buffer; 17 register size_t len asm("a1") = _len; 18 register unsigned int flags asm("a2") = _flags; 19 20 asm volatile ("ecall\n" 21 : "+r" (ret) 22 : "r" (nr), "r" (buffer), "r" (len), "r" (flags) 23 : "memory"); 24 25 return ret; 26 } 27 28 #endif /* !__ASSEMBLY__ */ 29 30 #endif /* __ASM_VDSO_GETRANDOM_H */ 31