Differential D4167 Diff 13268 src/compat/glibc_compat.cpp

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src/compat/glibc_compat.cpp

	// Copyright (c) 2009-2014 The Bitcoin Core developers			// Copyright (c) 2009-2014 The Bitcoin Core developers
	// Distributed under the MIT software license, see the accompanying			// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.			// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#if defined(HAVE_CONFIG_H)			#if defined(HAVE_CONFIG_H)
	#include <config/bitcoin-config.h>			#include <config/bitcoin-config.h>
	#endif			#endif

				#include <cstdarg>
	#include <cstddef>			#include <cstddef>
	#include <cstdint>			#include <cstdint>

	#if defined(HAVE_SYS_SELECT_H)			#if defined(HAVE_SYS_SELECT_H)
	#include <sys/select.h>			#include <sys/select.h>
	#endif			#endif

	// Prior to GLIBC_2.14, memcpy was aliased to memmove.			// Prior to GLIBC_2.14, memcpy was aliased to memmove.
	▲ Show 20 Lines • Show All 44 Lines • ▼ Show 20 Lines
	#elif defined(__arm__)			#elif defined(__arm__)
	__asm(".symver log2f_old,log2f@GLIBC_2.4");			__asm(".symver log2f_old,log2f@GLIBC_2.4");
	#elif defined(__aarch64__)			#elif defined(__aarch64__)
	__asm(".symver log2f_old,log2f@GLIBC_2.17");			__asm(".symver log2f_old,log2f@GLIBC_2.17");
	#endif			#endif
	extern "C" float __wrap_log2f(float x) {			extern "C" float __wrap_log2f(float x) {
	return log2f_old(x);			return log2f_old(x);
	}			}

				/*
				* Starting with GLIBC_2.28, the `fcntl()` function has a new variant
				* `fcntl64()`:
				* https://gitlab.com/freedesktop-sdk/mirrors/glibc/commit/06ab719d30b01da401150068054d3b8ea93dd12f
				* (link to a mirror, glibc has no online source browser).
				*
				* See also the release notes for the 2.28 version:
				* https://www.sourceware.org/ml/libc-alpha/2018-08/msg00003.html
				*
				* This is intended to fix a bug related to large file support on architectures
				* where off_t and off64_t are not the same underlying type.
				* To remain compatible with the previous versions, the GLIBC offers a
				* compatibility symbol for these architectures. We can link the new `fcntl()`
				* and `fcntl64()` against this symbol with the help of a wrapper.
				*/
				#if defined(HAVE_CONFIG_H) && !defined(OFF_T_EQUALS_OFF64_T)
				extern "C" int fcntl_old(int fd, int cmd, ...);
				#ifdef __i386__
				__asm(".symver fcntl_old,fcntl@GLIBC_2.0");
				#elif defined(__amd64__)
				__asm(".symver fcntl_old,fcntl@GLIBC_2.2.5");
				#elif defined(__arm__)
				__asm(".symver fcntl_old,fcntl@GLIBC_2.4");
				#elif defined(__aarch64__)
				__asm(".symver fcntl_old,fcntl@GLIBC_2.17");
				#endif

				extern "C" int __wrap_fcntl(int fd, int cmd, ...) {
				int ret;
				va_list vargs;
				va_start(vargs, cmd);
				ret = fcntl_old(fd, cmd, va_arg(vargs, void *));
				va_end(vargs);
				return ret;
				}
				extern "C" int __wrap_fcntl64(int fd, int cmd, ...) {
				int ret;
				va_list vargs;
				va_start(vargs, cmd);
				ret = fcntl_old(fd, cmd, va_arg(vargs, void *));
				va_end(vargs);
				return ret;
				}
				#endif