arch/riscv/include/asm/string.h

Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/string.h

File Facts

System
Linux kernel
Corpus path
arch/riscv/include/asm/string.h
Extension
.h
Size
1690 bytes
Lines
54
Domain
Architecture Layer
Bucket
arch/riscv
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_RISCV_STRING_H
#define _ASM_RISCV_STRING_H

#include <linux/types.h>
#include <linux/linkage.h>

#define __HAVE_ARCH_MEMSET
extern asmlinkage void *memset(void *, int, size_t);
extern asmlinkage void *__memset(void *, int, size_t);
#define __HAVE_ARCH_MEMCPY
extern asmlinkage void *memcpy(void *, const void *, size_t);
extern asmlinkage void *__memcpy(void *, const void *, size_t);
#define __HAVE_ARCH_MEMMOVE
extern asmlinkage void *memmove(void *, const void *, size_t);
extern asmlinkage void *__memmove(void *, const void *, size_t);

#if !(defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS))
#define __HAVE_ARCH_STRCMP
extern asmlinkage int strcmp(const char *cs, const char *ct);

#define __HAVE_ARCH_STRLEN
extern asmlinkage __kernel_size_t strlen(const char *);

#define __HAVE_ARCH_STRNCMP
extern asmlinkage int strncmp(const char *cs, const char *ct, size_t count);

#define __HAVE_ARCH_STRNLEN
extern asmlinkage __kernel_size_t strnlen(const char *, size_t);

#define __HAVE_ARCH_STRCHR
extern asmlinkage char *strchr(const char *, int);

#define __HAVE_ARCH_STRRCHR
extern asmlinkage char *strrchr(const char *, int);
#endif

/* For those files which don't want to check by kasan. */
#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
#define memcpy(dst, src, len) __memcpy(dst, src, len)
#define memset(s, c, n) __memset(s, c, n)
#define memmove(dst, src, len) __memmove(dst, src, len)

#ifndef __NO_FORTIFY
#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
#endif

#endif
#endif /* _ASM_RISCV_STRING_H */

Annotation

Implementation Notes