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HV: rewrite memcpy_s to be iso c11 compliant

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Per C11 standard (ISO/IEC 9899:2011): K.3.7.1.1

1. Copying shall not take place between objects that overlap;
2. If there is a runtime-constraint violation, the memcpy_s function stores
   zeros in the first s1max characters of the object;
3. The memcpy_s function returns zero if there was no runtime-constraint
   violation. Otherwise, a nonzero value is returned.

Tracked-On: #4885

Signed-off-by: Victor Sun <victor.sun@intel.com>
Reviewed-by: Yonghua Huang <yonghua.huang@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Victor Sun
2020-05-28 15:46:08 +08:00
committed by wenlingz
parent 45d1f38a5b
commit e254be150a
2 changed files with 37 additions and 34 deletions
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2
hypervisor/include/lib/rtl.h
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@@ -36,7 +36,7 @@ char *strncpy_s(char *d_arg, size_t dmax, const char *s_arg, size_t slen_arg);
char *strchr(char *s_arg, char ch);
size_t strnlen_s(const char *str_arg, size_t maxlen_arg);
void *memset(void *base, uint8_t v, size_t n);
void *memcpy_s(void *d, size_t dmax, const void *s, size_t slen);
int32_t memcpy_s(void *d, size_t dmax, const void *s, size_t slen);
int64_t strtol_deci(const char *nptr);
uint64_t strtoul_hex(const char *nptr);
char *strstr_s(const char *str1, size_t maxlen1,