Improvements to libtest

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 72 insertions, 0 deletions

diff --git a/libtest/mmap.c b/libtest/mmap.c
new file mode 100644
index 0000000..c12594f
--- /dev/null
+++ b/libtest/mmap.c
@@ -0,0 +1,72 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+#include <sys/syscall.h>
+
+
+void *
+libtest_real_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off)
+{
+	size_t pagesize = libtest_get_pagesize();
+
+	if (off < 0 || off % (off_t)pagesize)
+		goto einval;
+	off /= (off_t)pagesize;
+
+#if defined(__x86_64__) && defined(__ILP32__) /* x32 */
+	if (off > LLONG_MAX)
+		goto einval;
+#else
+	if (off > LONG_MAX)
+		goto einval;
+#endif
+
+#ifdef SYS_mmap2
+	assert(pagesize == 4096u);
+	return (void *)syscall(SYS_mmap2, addr, len, prot, flags, fd, off);
+#else
+	return (void *)syscall(SYS_mmap, addr, len, prot, flags, fd, off);
+#endif
+
+einval:
+	errno = EINVAL;
+	return MAP_FAILED;
+}
+
+
+int
+libtest_real_munmap(void *addr, size_t len)
+{
+	return syscall(SYS_munmap, addr, len);
+}
+
+
+void *
+libtest_real_mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...)
+{
+	va_list args;
+	void *new_addr = NULL;
+
+	if (flags & MREMAP_FIXED) {
+		va_start(args, flags);
+		new_addr = va_arg(args, void *);
+		va_end(args);
+	}
+
+	return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr);
+}
+
+
+#else
+
+
+CONST int
+main(void)
+{
+	/* TODO maybe test */
+	return 0;
+}
+
+
+#endif