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//===-- asan_linux.cc -----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// Linux-specific details.
//===----------------------------------------------------------------------===//
#ifdef __linux__
#include "asan_internal.h"
#include <sys/mman.h>
#include <sys/syscall.h>
#include <unistd.h>
extern char _DYNAMIC[];
namespace __asan {
void *AsanDoesNotSupportStaticLinkage() {
// This will fail to link with -static.
return &_DYNAMIC;
}
#ifdef ANDROID
#define SYS_mmap2 __NR_mmap2
#define SYS_write __NR_write
#endif
void *asan_mmap(void *addr, size_t length, int prot, int flags,
int fd, uint64_t offset) {
# if __WORDSIZE == 64
return (void *)syscall(SYS_mmap, addr, length, prot, flags, fd, offset);
# else
return (void *)syscall(SYS_mmap2, addr, length, prot, flags, fd, offset);
# endif
}
ssize_t asan_write(int fd, const void *buf, size_t count) {
return (ssize_t)syscall(SYS_write, fd, buf, count);
}
} // namespace __asan
#endif // __linux__
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