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80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/** Allows to build programs with libc 2.18 and run on systems with at least libc 2.11,
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* such as Ubuntu Lucid or CentOS 6.
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*
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* Highly experimental, not recommended, disabled by default.
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*
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* To use, include this file with -include compiler parameter.
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* And add -Wl,--wrap=memcpy for linking.
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*
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* Also look at http://www.lightofdawn.org/wiki/wiki.cgi/NewAppsOnOldGlibc
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*
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* If you want even older systems, such as Ubuntu Hardy,
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* add fallocate, pipe2, __longjmp_chk, __vasprintf_chk.
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*/
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#if defined (__cplusplus)
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extern "C" {
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#endif
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#include <stdlib.h>
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#include <sys/select.h>
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__attribute__((__weak__)) long int __fdelt_chk(long int d)
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{
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if (d < 0 || d >= FD_SETSIZE)
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abort();
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return d / __NFDBITS;
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}
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#include <sys/poll.h>
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__attribute__((__weak__)) int __poll_chk(struct pollfd * fds, nfds_t nfds, int timeout, __SIZE_TYPE__ fdslen)
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{
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if (fdslen / sizeof(*fds) < nfds)
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abort();
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return poll(fds, nfds, timeout);
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}
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__attribute__((__weak__)) void * __memcpy_glibc_2_2_5(void *, const void *, size_t);
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__asm__(".symver __memcpy_glibc_2_2_5, memcpy@GLIBC_2.2.5");
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__attribute__((__weak__)) void * __wrap_memcpy(void * dest, const void * src, size_t n)
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{
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return __memcpy_glibc_2_2_5(dest, src, n);
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}
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__attribute__((__weak__)) size_t __pthread_get_minstack(const pthread_attr_t * attr)
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{
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return 1048576; /// This is a guess. Don't sure it is correct.
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}
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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extern long int syscall (long int __sysno, ...) __THROW;
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__attribute__((__weak__)) int __gai_sigqueue(int sig, const union sigval val, pid_t caller_pid)
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{
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siginfo_t info;
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memset(&info, 0, sizeof(siginfo_t));
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info.si_signo = sig;
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info.si_code = SI_ASYNCNL;
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info.si_pid = caller_pid;
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info.si_uid = getuid();
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info.si_value = val;
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return syscall(__NR_rt_sigqueueinfo, info.si_pid, sig, &info);
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}
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#if defined (__cplusplus)
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}
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#endif
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