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usercopy: usercopy_memset and possibly user helper macro

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Matheus
2024-09-21 12:05:44 -03:00
parent fb2fa68752
commit 09836801a3
2 changed files with 40 additions and 0 deletions
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kernel-src/include/kernel/usercopy.h
+7
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@@ -17,13 +17,20 @@ static inline int _usercopy_strlen_wrapper(void *str, size_t *size) {
return 0;
}
static inline int _usercopy_memset_wrapper(void *dst, uint8_t byte, size_t size) {
memset(dst, byte, size);
return 0;
}
#define USERCOPY_POSSIBLY_FROM_USER(kernel, user, size) (IS_USER_ADDRESS(user) ? usercopy_fromuser(kernel, user, size) : _usercopy_memcpy_wrapper(kernel, user, size))
#define USERCOPY_POSSIBLY_TO_USER(user, kernel, size) (IS_USER_ADDRESS(user) ? usercopy_touser(user, kernel, size) : _usercopy_memcpy_wrapper(user, kernel, size))
#define USERCOPY_POSSIBLY_STRLEN_FROM_USER(user, sizep) (IS_USER_ADDRESS(user) ? usercopy_strlen(user, sizep) : _usercopy_strlen_wrapper(user, sizep))
#define USERCOPY_POSSIBLY_MEMSET_TO_USER(user, byte, size) (IS_USER_ADDRESS(user) ? usercopy_memset(user, byte, size) : _usercopy_memset_wrapper(user, byte, size))
int usercopy_touser(void *user, void *kernel, size_t size);
int usercopy_fromuser(void *kernel, void *user, size_t size);
int usercopy_fromuseratomic32(uint32_t *user32, uint32_t *value);
int usercopy_strlen(const char *, size_t *size);
int usercopy_memset(void *user, uint8_t byte, size_t size);
#endif