@@ -181,6 +181,8 @@ extern int os_eventfd(unsigned int initval, int flags);
extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
const int *fds, unsigned int fds_num);
int os_poll(unsigned int n, const int *fds);
+void *os_mmap_rw_shared(int fd, size_t size);
+void *os_mremap_rw_shared(void *old_addr, size_t old_size, size_t new_size);
/* start_up.c */
extern void os_early_checks(void);
@@ -17,6 +17,7 @@
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/un.h>
+#include <sys/mman.h>
#include <sys/types.h>
#include <sys/eventfd.h>
#include <poll.h>
@@ -718,3 +719,25 @@ int os_poll(unsigned int n, const int *fds)
return -EIO;
}
+
+void *os_mmap_rw_shared(int fd, size_t size)
+{
+ void *res = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+
+ if (res == MAP_FAILED)
+ return NULL;
+
+ return res;
+}
+
+void *os_mremap_rw_shared(void *old_addr, size_t old_size, size_t new_size)
+{
+ void *res;
+
+ res = mremap(old_addr, old_size, new_size, MREMAP_MAYMOVE, NULL);
+
+ if (res == MAP_FAILED)
+ return NULL;
+
+ return res;
+}