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Copy pathglibc_compat.cpp
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150 lines (129 loc) · 3.78 KB
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// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#if defined(HAVE_CONFIG_H)
#include <config/navcoin-config.h>
#endif
#include <cstddef>
#include <cstdint>
#include <errno.h>
#include <glob.h>
#include <poll.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/syscall.h>
#if defined(HAVE_SYS_SELECT_H)
#include <sys/select.h>
#endif
// Prior to GLIBC_2.14, memcpy was aliased to memmove.
extern "C" void* memmove(void* a, const void* b, size_t c);
extern "C" void* memcpy(void* a, const void* b, size_t c)
{
return memmove(a, b, c);
}
extern "C" void __chk_fail(void) __attribute__((__noreturn__));
extern "C" FDELT_TYPE __fdelt_warn(FDELT_TYPE a)
{
if (a >= FD_SETSIZE)
__chk_fail();
return a / __NFDBITS;
}
extern "C" FDELT_TYPE __fdelt_chk(FDELT_TYPE) __attribute__((weak, alias("__fdelt_warn")));
#if defined(__i386__) || defined(__arm__)
extern "C" int64_t __udivmoddi4(uint64_t u, uint64_t v, uint64_t* rp);
extern "C" int64_t __wrap___divmoddi4(int64_t u, int64_t v, int64_t* rp)
{
int32_t c1 = 0, c2 = 0;
int64_t uu = u, vv = v;
int64_t w;
int64_t r;
if (uu < 0) {
c1 = ~c1, c2 = ~c2, uu = -uu;
}
if (vv < 0) {
c1 = ~c1, vv = -vv;
}
w = __udivmoddi4(uu, vv, (uint64_t*)&r);
if (c1)
w = -w;
if (c2)
r = -r;
*rp = r;
return w;
}
#endif
extern "C" float log2f_old(float x);
#ifdef __i386__
__asm(".symver log2f_old,log2f@GLIBC_2.1");
#elif defined(__amd64__)
__asm(".symver log2f_old,log2f@GLIBC_2.2.5");
#elif defined(__arm__)
__asm(".symver log2f_old,log2f@GLIBC_2.4");
#elif defined(__aarch64__)
__asm(".symver log2f_old,log2f@GLIBC_2.17");
#elif defined(__riscv)
__asm(".symver log2f_old,log2f@GLIBC_2.27");
#endif
extern "C" float __wrap_log2f(float x)
{
return log2f_old(x);
}
extern "C" int glob_old(const char * pattern, int flags, int (*errfunc) (const char *epath, int eerrno), glob_t *pglob);
#ifdef __i386__
__asm(".symver glob_old,glob@GLIBC_2.0");
#elif defined(__amd64__)
__asm(".symver glob_old,glob@GLIBC_2.2.5");
#elif defined(__arm__)
__asm(".symver glob_old,glob@GLIBC_2.4");
#elif defined(__aarch64__)
__asm(".symver glob_old,glob@GLIBC_2.17");
#elif defined(__riscv)
__asm(".symver glob_old,glob@GLIBC_2.27");
#endif
extern "C" int __wrap_glob(const char * pattern, int flags, int (*errfunc) (const char *epath, int eerrno), glob_t *pglob)
{
return glob_old(pattern, flags, errfunc, pglob);
}
#if defined(__i386__) || defined(__arm__)
extern "C" int __wrap_glob64(const char * pattern, int flags, int (*errfunc) (const char *epath, int eerrno), glob_t *pglob)
{
return glob_old(pattern, flags, errfunc, pglob);
}
#endif
extern "C" int __poll_chk(struct pollfd *fds, nfds_t nfds, int timeout, size_t fdslen)
{
if(fdslen / sizeof(*fds) < nfds)
__chk_fail();
return poll(fds, nfds, timeout);
}
extern "C" void __explicit_bzero_chk(void *dst, size_t len, size_t dstlen)
{
if (__glibc_unlikely(dstlen < len))
__chk_fail();
explicit_bzero(dst, len);
}
extern "C" int getentropy(void *buf, size_t len)
{
int pre_errno = errno;
int ret;
if (len > 256)
return (-1);
do {
ret = syscall(SYS_getrandom, buf, len, 0);
} while (ret == -1 && errno == EINTR);
if (ret != (int)len)
return (-1);
errno = pre_errno;
return (0);
}
#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4))
extern "C" void* reallocarray(void *optr, size_t nmemb, size_t size)
{
if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
nmemb > 0 && SIZE_MAX / nmemb < size) {
errno = ENOMEM;
return NULL;
}
return realloc(optr, size * nmemb);
}