508 lines
20 KiB
C
508 lines
20 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: memset_s function
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* Author: Hisilicon
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* Create: 2014-02-25
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*/
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/*
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* [Standardize-exceptions] Use unsafe function: Portability
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* [reason] Use unsafe function to implement security function to maintain platform compatibility.
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* And sufficient input validation is performed before calling
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*/
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#include "securecutil.h"
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#ifndef SECUREC_MEMSET_WITH_PERFORMANCE
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#define SECUREC_MEMSET_WITH_PERFORMANCE 0
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#endif
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#define SECUREC_MEMSET_PARAM_OK(dest, destMax, count) (SECUREC_LIKELY((destMax) <= SECUREC_MEM_MAX_LEN && \
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(dest) != NULL && (count) <= (destMax)))
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#if SECUREC_WITH_PERFORMANCE_ADDONS || SECUREC_MEMSET_WITH_PERFORMANCE
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/* Use union to clear strict-aliasing warning */
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typedef union {
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SecStrBuf32 buf32;
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SecStrBuf31 buf31;
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SecStrBuf30 buf30;
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SecStrBuf29 buf29;
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SecStrBuf28 buf28;
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SecStrBuf27 buf27;
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SecStrBuf26 buf26;
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SecStrBuf25 buf25;
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SecStrBuf24 buf24;
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SecStrBuf23 buf23;
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SecStrBuf22 buf22;
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SecStrBuf21 buf21;
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SecStrBuf20 buf20;
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SecStrBuf19 buf19;
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SecStrBuf18 buf18;
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SecStrBuf17 buf17;
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SecStrBuf16 buf16;
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SecStrBuf15 buf15;
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SecStrBuf14 buf14;
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SecStrBuf13 buf13;
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SecStrBuf12 buf12;
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SecStrBuf11 buf11;
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SecStrBuf10 buf10;
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SecStrBuf9 buf9;
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SecStrBuf8 buf8;
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SecStrBuf7 buf7;
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SecStrBuf6 buf6;
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SecStrBuf5 buf5;
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SecStrBuf4 buf4;
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SecStrBuf3 buf3;
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SecStrBuf2 buf2;
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SecStrBuf1 buf1;
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} SecStrBuf32Union;
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/* C standard initializes the first member of the consortium. */
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static const SecStrBuf32 g_allZero = {{
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'
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}};
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static const SecStrBuf32 g_allFF = {{
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
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}};
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/* Clear coversion warning strict aliasing" */
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SECUREC_INLINE const SecStrBuf32Union *SecStrictAliasingCast(const SecStrBuf32 *buf)
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{
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return (const SecStrBuf32Union *)buf;
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}
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#ifndef SECUREC_MEMSET_THRESHOLD_SIZE
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#define SECUREC_MEMSET_THRESHOLD_SIZE 32UL
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#endif
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#define SECUREC_UNALIGNED_SET(dest, c, count) do { \
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char *pcDest = (char *)(dest); \
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switch (count) { \
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case 32: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 31: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 30: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 29: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 28: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 27: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 26: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 25: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 24: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 23: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 22: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 21: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 20: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 19: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 18: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 17: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 16: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 15: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 14: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 13: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 12: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 11: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 10: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 9: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 8: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 7: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 6: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 5: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 4: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 3: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 2: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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case 1: \
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*(pcDest++) = (char)(c); \
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/* fall-through */ /* FALLTHRU */ \
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default: \
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break; \
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} \
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} SECUREC_WHILE_ZERO
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#define SECUREC_ALIGNED_SET_OPT_ZERO_FF(dest, c, count) do { \
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switch (c) { \
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case 0: \
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switch (count) { \
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case 1: \
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*(SecStrBuf1 *)(dest) = *(const SecStrBuf1 *)(&((SecStrictAliasingCast(&g_allZero))->buf1)); \
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break; \
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case 2: \
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*(SecStrBuf2 *)(dest) = *(const SecStrBuf2 *)(&((SecStrictAliasingCast(&g_allZero))->buf2)); \
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break; \
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case 3: \
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*(SecStrBuf3 *)(dest) = *(const SecStrBuf3 *)(&((SecStrictAliasingCast(&g_allZero))->buf3)); \
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break; \
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case 4: \
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*(SecStrBuf4 *)(dest) = *(const SecStrBuf4 *)(&((SecStrictAliasingCast(&g_allZero))->buf4)); \
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break; \
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case 5: \
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*(SecStrBuf5 *)(dest) = *(const SecStrBuf5 *)(&((SecStrictAliasingCast(&g_allZero))->buf5)); \
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break; \
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case 6: \
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*(SecStrBuf6 *)(dest) = *(const SecStrBuf6 *)(&((SecStrictAliasingCast(&g_allZero))->buf6)); \
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break; \
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case 7: \
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*(SecStrBuf7 *)(dest) = *(const SecStrBuf7 *)(&((SecStrictAliasingCast(&g_allZero))->buf7)); \
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break; \
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case 8: \
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*(SecStrBuf8 *)(dest) = *(const SecStrBuf8 *)(&((SecStrictAliasingCast(&g_allZero))->buf8)); \
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break; \
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case 9: \
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*(SecStrBuf9 *)(dest) = *(const SecStrBuf9 *)(&((SecStrictAliasingCast(&g_allZero))->buf9)); \
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break; \
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case 10: \
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*(SecStrBuf10 *)(dest) = *(const SecStrBuf10 *)(&((SecStrictAliasingCast(&g_allZero))->buf10)); \
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break; \
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case 11: \
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*(SecStrBuf11 *)(dest) = *(const SecStrBuf11 *)(&((SecStrictAliasingCast(&g_allZero))->buf11)); \
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break; \
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case 12: \
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*(SecStrBuf12 *)(dest) = *(const SecStrBuf12 *)(&((SecStrictAliasingCast(&g_allZero))->buf12)); \
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break; \
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case 13: \
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*(SecStrBuf13 *)(dest) = *(const SecStrBuf13 *)(&((SecStrictAliasingCast(&g_allZero))->buf13)); \
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break; \
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case 14: \
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*(SecStrBuf14 *)(dest) = *(const SecStrBuf14 *)(&((SecStrictAliasingCast(&g_allZero))->buf14)); \
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break; \
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case 15: \
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*(SecStrBuf15 *)(dest) = *(const SecStrBuf15 *)(&((SecStrictAliasingCast(&g_allZero))->buf15)); \
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break; \
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case 16: \
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*(SecStrBuf16 *)(dest) = *(const SecStrBuf16 *)(&((SecStrictAliasingCast(&g_allZero))->buf16)); \
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break; \
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case 17: \
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*(SecStrBuf17 *)(dest) = *(const SecStrBuf17 *)(&((SecStrictAliasingCast(&g_allZero))->buf17)); \
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break; \
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case 18: \
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*(SecStrBuf18 *)(dest) = *(const SecStrBuf18 *)(&((SecStrictAliasingCast(&g_allZero))->buf18)); \
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break; \
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case 19: \
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*(SecStrBuf19 *)(dest) = *(const SecStrBuf19 *)(&((SecStrictAliasingCast(&g_allZero))->buf19)); \
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break; \
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case 20: \
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*(SecStrBuf20 *)(dest) = *(const SecStrBuf20 *)(&((SecStrictAliasingCast(&g_allZero))->buf20)); \
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break; \
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case 21: \
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*(SecStrBuf21 *)(dest) = *(const SecStrBuf21 *)(&((SecStrictAliasingCast(&g_allZero))->buf21)); \
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break; \
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case 22: \
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*(SecStrBuf22 *)(dest) = *(const SecStrBuf22 *)(&((SecStrictAliasingCast(&g_allZero))->buf22)); \
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break; \
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case 23: \
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*(SecStrBuf23 *)(dest) = *(const SecStrBuf23 *)(&((SecStrictAliasingCast(&g_allZero))->buf23)); \
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break; \
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case 24: \
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*(SecStrBuf24 *)(dest) = *(const SecStrBuf24 *)(&((SecStrictAliasingCast(&g_allZero))->buf24)); \
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break; \
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case 25: \
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*(SecStrBuf25 *)(dest) = *(const SecStrBuf25 *)(&((SecStrictAliasingCast(&g_allZero))->buf25)); \
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break; \
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case 26: \
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*(SecStrBuf26 *)(dest) = *(const SecStrBuf26 *)(&((SecStrictAliasingCast(&g_allZero))->buf26)); \
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break; \
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case 27: \
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*(SecStrBuf27 *)(dest) = *(const SecStrBuf27 *)(&((SecStrictAliasingCast(&g_allZero))->buf27)); \
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break; \
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case 28: \
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*(SecStrBuf28 *)(dest) = *(const SecStrBuf28 *)(&((SecStrictAliasingCast(&g_allZero))->buf28)); \
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break; \
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case 29: \
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*(SecStrBuf29 *)(dest) = *(const SecStrBuf29 *)(&((SecStrictAliasingCast(&g_allZero))->buf29)); \
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break; \
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case 30: \
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*(SecStrBuf30 *)(dest) = *(const SecStrBuf30 *)(&((SecStrictAliasingCast(&g_allZero))->buf30)); \
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break; \
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case 31: \
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*(SecStrBuf31 *)(dest) = *(const SecStrBuf31 *)(&((SecStrictAliasingCast(&g_allZero))->buf31)); \
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break; \
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case 32: \
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*(SecStrBuf32 *)(dest) = *(const SecStrBuf32 *)(&((SecStrictAliasingCast(&g_allZero))->buf32)); \
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break; \
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default: \
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break; \
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} \
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break; \
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case 0xFF: \
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switch (count) { \
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case 1: \
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*(SecStrBuf1 *)(dest) = *(const SecStrBuf1 *)(&((SecStrictAliasingCast(&g_allFF))->buf1)); \
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break; \
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case 2: \
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*(SecStrBuf2 *)(dest) = *(const SecStrBuf2 *)(&((SecStrictAliasingCast(&g_allFF))->buf2)); \
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break; \
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case 3: \
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*(SecStrBuf3 *)(dest) = *(const SecStrBuf3 *)(&((SecStrictAliasingCast(&g_allFF))->buf3)); \
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break; \
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case 4: \
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*(SecStrBuf4 *)(dest) = *(const SecStrBuf4 *)(&((SecStrictAliasingCast(&g_allFF))->buf4)); \
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break; \
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case 5: \
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*(SecStrBuf5 *)(dest) = *(const SecStrBuf5 *)(&((SecStrictAliasingCast(&g_allFF))->buf5)); \
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break; \
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case 6: \
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*(SecStrBuf6 *)(dest) = *(const SecStrBuf6 *)(&((SecStrictAliasingCast(&g_allFF))->buf6)); \
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break; \
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case 7: \
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*(SecStrBuf7 *)(dest) = *(const SecStrBuf7 *)(&((SecStrictAliasingCast(&g_allFF))->buf7)); \
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break; \
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case 8: \
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*(SecStrBuf8 *)(dest) = *(const SecStrBuf8 *)(&((SecStrictAliasingCast(&g_allFF))->buf8)); \
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break; \
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case 9: \
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*(SecStrBuf9 *)(dest) = *(const SecStrBuf9 *)(&((SecStrictAliasingCast(&g_allFF))->buf9)); \
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break; \
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case 10: \
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*(SecStrBuf10 *)(dest) = *(const SecStrBuf10 *)(&((SecStrictAliasingCast(&g_allFF))->buf10)); \
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break; \
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case 11: \
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*(SecStrBuf11 *)(dest) = *(const SecStrBuf11 *)(&((SecStrictAliasingCast(&g_allFF))->buf11)); \
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break; \
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case 12: \
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*(SecStrBuf12 *)(dest) = *(const SecStrBuf12 *)(&((SecStrictAliasingCast(&g_allFF))->buf12)); \
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break; \
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case 13: \
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*(SecStrBuf13 *)(dest) = *(const SecStrBuf13 *)(&((SecStrictAliasingCast(&g_allFF))->buf13)); \
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break; \
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case 14: \
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*(SecStrBuf14 *)(dest) = *(const SecStrBuf14 *)(&((SecStrictAliasingCast(&g_allFF))->buf14)); \
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break; \
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case 15: \
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*(SecStrBuf15 *)(dest) = *(const SecStrBuf15 *)(&((SecStrictAliasingCast(&g_allFF))->buf15)); \
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break; \
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case 16: \
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*(SecStrBuf16 *)(dest) = *(const SecStrBuf16 *)(&((SecStrictAliasingCast(&g_allFF))->buf16)); \
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break; \
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case 17: \
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*(SecStrBuf17 *)(dest) = *(const SecStrBuf17 *)(&((SecStrictAliasingCast(&g_allFF))->buf17)); \
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break; \
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case 18: \
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*(SecStrBuf18 *)(dest) = *(const SecStrBuf18 *)(&((SecStrictAliasingCast(&g_allFF))->buf18)); \
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break; \
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case 19: \
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*(SecStrBuf19 *)(dest) = *(const SecStrBuf19 *)(&((SecStrictAliasingCast(&g_allFF))->buf19)); \
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break; \
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case 20: \
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*(SecStrBuf20 *)(dest) = *(const SecStrBuf20 *)(&((SecStrictAliasingCast(&g_allFF))->buf20)); \
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break; \
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case 21: \
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*(SecStrBuf21 *)(dest) = *(const SecStrBuf21 *)(&((SecStrictAliasingCast(&g_allFF))->buf21)); \
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break; \
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case 22: \
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*(SecStrBuf22 *)(dest) = *(const SecStrBuf22 *)(&((SecStrictAliasingCast(&g_allFF))->buf22)); \
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break; \
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case 23: \
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*(SecStrBuf23 *)(dest) = *(const SecStrBuf23 *)(&((SecStrictAliasingCast(&g_allFF))->buf23)); \
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break; \
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case 24: \
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*(SecStrBuf24 *)(dest) = *(const SecStrBuf24 *)(&((SecStrictAliasingCast(&g_allFF))->buf24)); \
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break; \
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case 25: \
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*(SecStrBuf25 *)(dest) = *(const SecStrBuf25 *)(&((SecStrictAliasingCast(&g_allFF))->buf25)); \
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break; \
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case 26: \
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*(SecStrBuf26 *)(dest) = *(const SecStrBuf26 *)(&((SecStrictAliasingCast(&g_allFF))->buf26)); \
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break; \
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case 27: \
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*(SecStrBuf27 *)(dest) = *(const SecStrBuf27 *)(&((SecStrictAliasingCast(&g_allFF))->buf27)); \
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break; \
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case 28: \
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*(SecStrBuf28 *)(dest) = *(const SecStrBuf28 *)(&((SecStrictAliasingCast(&g_allFF))->buf28)); \
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break; \
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case 29: \
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*(SecStrBuf29 *)(dest) = *(const SecStrBuf29 *)(&((SecStrictAliasingCast(&g_allFF))->buf29)); \
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break; \
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case 30: \
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*(SecStrBuf30 *)(dest) = *(const SecStrBuf30 *)(&((SecStrictAliasingCast(&g_allFF))->buf30)); \
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break; \
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case 31: \
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*(SecStrBuf31 *)(dest) = *(const SecStrBuf31 *)(&((SecStrictAliasingCast(&g_allFF))->buf31)); \
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break; \
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case 32: \
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*(SecStrBuf32 *)(dest) = *(const SecStrBuf32 *)(&((SecStrictAliasingCast(&g_allFF))->buf32)); \
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break; \
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default: \
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break; \
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} \
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break; \
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default: \
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SECUREC_UNALIGNED_SET((dest), (c), (count)); \
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} /* END switch */ \
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} SECUREC_WHILE_ZERO
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#define SECUREC_SMALL_MEM_SET(dest, c, count); do { \
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if (SECUREC_ADDR_ALIGNED_8((dest))) { \
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SECUREC_ALIGNED_SET_OPT_ZERO_FF((dest), (c), (count)); \
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} else { \
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SECUREC_UNALIGNED_SET((dest), (c), (count)); \
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} \
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} SECUREC_WHILE_ZERO
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/*
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* Performance optimization
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*/
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#define SECUREC_MEMSET_OPT(dest, c, count) do { \
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if ((count) > SECUREC_MEMSET_THRESHOLD_SIZE) { \
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SECUREC_MEMSET_WARP_OPT((dest), (c), (count)); \
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} else { \
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SECUREC_SMALL_MEM_SET((dest), (c), (count)); \
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} \
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} SECUREC_WHILE_ZERO
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#endif
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/*
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* Handling errors
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*/
|
|
SECUREC_INLINE errno_t SecMemsetError(void *dest, size_t destMax, int c, size_t count)
|
|
{
|
|
/* Check destMax is 0 compatible with _sp macro */
|
|
if (destMax == 0 || destMax > SECUREC_MEM_MAX_LEN) {
|
|
SECUREC_ERROR_INVALID_RANGE("memset_s");
|
|
return ERANGE;
|
|
}
|
|
if (dest == NULL) {
|
|
SECUREC_ERROR_INVALID_PARAMTER("memset_s");
|
|
return EINVAL;
|
|
}
|
|
if (count > destMax) {
|
|
(void)memset(dest, c, destMax); /* Set entire buffer to value c */
|
|
SECUREC_ERROR_INVALID_RANGE("memset_s");
|
|
return ERANGE_AND_RESET;
|
|
}
|
|
return EOK;
|
|
}
|
|
|
|
/*
|
|
* <FUNCTION DESCRIPTION>
|
|
* The memset_s function copies the value of c (converted to an unsigned char)
|
|
* into each of the first count characters of the object pointed to by dest.
|
|
*
|
|
* <INPUT PARAMETERS>
|
|
* dest Pointer to destination.
|
|
* destMax The size of the buffer.
|
|
* c Character to set.
|
|
* count Number of characters.
|
|
*
|
|
* <OUTPUT PARAMETERS>
|
|
* dest buffer is uptdated.
|
|
*
|
|
* <RETURN VALUE>
|
|
* EOK Success
|
|
* EINVAL dest == NULL and destMax != 0 and destMax <= SECUREC_MEM_MAX_LEN
|
|
* ERANGE destMax > SECUREC_MEM_MAX_LEN or (destMax is 0 and count > destMax)
|
|
* ERANGE_AND_RESET count > destMax and destMax != 0 and destMax <= SECUREC_MEM_MAX_LEN and dest != NULL
|
|
*
|
|
* if return ERANGE_AND_RESET then fill dest to c ,fill length is destMax
|
|
*/
|
|
errno_t memset_s(void *dest, size_t destMax, int c, size_t count)
|
|
{
|
|
if (SECUREC_MEMSET_PARAM_OK(dest, destMax, count)) {
|
|
#if SECUREC_MEMSET_WITH_PERFORMANCE
|
|
SECUREC_MEMSET_OPT(dest, c, count);
|
|
#else
|
|
SECUREC_MEMSET_WARP_OPT(dest, c, count);
|
|
#endif
|
|
return EOK;
|
|
}
|
|
/* Meet some runtime violation, return error code */
|
|
return SecMemsetError(dest, destMax, c, count);
|
|
}
|
|
|
|
#if SECUREC_IN_KERNEL
|
|
EXPORT_SYMBOL(memset_s);
|
|
#endif
|
|
|
|
#if SECUREC_WITH_PERFORMANCE_ADDONS
|
|
/*
|
|
* Performance optimization
|
|
*/
|
|
errno_t memset_sOptAsm(void *dest, size_t destMax, int c, size_t count)
|
|
{
|
|
if (SECUREC_MEMSET_PARAM_OK(dest, destMax, count)) {
|
|
SECUREC_MEMSET_OPT(dest, c, count);
|
|
return EOK;
|
|
}
|
|
/* Meet some runtime violation, return error code */
|
|
return SecMemsetError(dest, destMax, c, count);
|
|
}
|
|
|
|
/*
|
|
* Performance optimization, trim judgement on "destMax <= SECUREC_MEM_MAX_LEN"
|
|
*/
|
|
errno_t memset_sOptTc(void *dest, size_t destMax, int c, size_t count)
|
|
{
|
|
if (SECUREC_LIKELY(count <= destMax && dest != NULL)) {
|
|
SECUREC_MEMSET_OPT(dest, c, count);
|
|
return EOK;
|
|
}
|
|
/* Meet some runtime violation, return error code */
|
|
return SecMemsetError(dest, destMax, c, count);
|
|
}
|
|
#endif
|
|
|