From 642b5fb0007b64c77d186fcb018d571152ee1d47 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Mon, 14 Aug 2023 18:51:07 +0200
Subject: reorganization: first steps

---
 src/libc/mman.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/libc/mman.c

(limited to 'src/libc/mman.c')

diff --git a/src/libc/mman.c b/src/libc/mman.c
new file mode 100644
index 0000000..32eeb2a
--- /dev/null
+++ b/src/libc/mman.c
@@ -0,0 +1,24 @@
+/* mmap() emulation */
+#include <camellia/syscalls.h>
+#include <errno.h>
+#include <sys/mman.h>
+
+void *mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off) {
+	(void)fd; (void) off;
+	if ((flags & MMAP_UNSUPPORTED) == MMAP_UNSUPPORTED ||
+		(prot & MMAP_UNSUPPORTED) == MMAP_UNSUPPORTED ||
+		!(flags & MAP_ANONYMOUS))
+	{
+		errno = ENOSYS;
+		return NULL;
+	}
+
+	void *p = _sys_memflag(addr, len, MEMFLAG_FINDFREE | MEMFLAG_PRESENT);
+	if (!p) errno = ENOMEM;
+	return p;
+}
+
+int munmap(void *addr, size_t len) {
+	_sys_memflag(addr, len, 0);
+	return 0;
+}
-- 
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