1 files changed, 111 insertions, 0 deletions
diff --git a/Userland/Libraries/LibC/mman.cpp b/Userland/Libraries/LibC/mman.cpp
new file mode 100644
index 0000000000..3df02a46da
--- /dev/null
+++ b/Userland/Libraries/LibC/mman.cpp
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <Kernel/API/Syscall.h>
+#include <errno.h>
+#include <mman.h>
+#include <stdio.h>
+#include <string.h>
+
+extern "C" {
+
+void* serenity_mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset, size_t alignment, const char* name)
+{
+    Syscall::SC_mmap_params params { (uintptr_t)addr, size, alignment, prot, flags, fd, offset, { name, name ? strlen(name) : 0 } };
+    ssize_t rc = syscall(SC_mmap, &params);
+    if (rc < 0 && -rc < EMAXERRNO) {
+        errno = -rc;
+        return MAP_FAILED;
+    }
+    return (void*)rc;
+}
+
+void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset)
+{
+    return serenity_mmap(addr, size, prot, flags, fd, offset, PAGE_SIZE, nullptr);
+}
+
+void* mmap_with_name(void* addr, size_t size, int prot, int flags, int fd, off_t offset, const char* name)
+{
+    return serenity_mmap(addr, size, prot, flags, fd, offset, PAGE_SIZE, name);
+}
+
+void* mremap(void* old_address, size_t old_size, size_t new_size, int flags)
+{
+    Syscall::SC_mremap_params params { (uintptr_t)old_address, old_size, new_size, flags };
+    ssize_t rc = syscall(SC_mremap, &params);
+    if (rc < 0 && -rc < EMAXERRNO) {
+        errno = -rc;
+        return MAP_FAILED;
+    }
+    return (void*)rc;
+}
+
+int munmap(void* addr, size_t size)
+{
+    int rc = syscall(SC_munmap, addr, size);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int mprotect(void* addr, size_t size, int prot)
+{
+    int rc = syscall(SC_mprotect, addr, size, prot);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int set_mmap_name(void* addr, size_t size, const char* name)
+{
+    if (!name) {
+        errno = EFAULT;
+        return -1;
+    }
+    Syscall::SC_set_mmap_name_params params { addr, size, { name, strlen(name) } };
+    int rc = syscall(SC_set_mmap_name, &params);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int madvise(void* address, size_t size, int advice)
+{
+    int rc = syscall(SC_madvise, address, size, advice);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int minherit(void* address, size_t size, int inherit)
+{
+    int rc = syscall(SC_minherit, address, size, inherit);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+void* allocate_tls(size_t size)
+{
+    int rc = syscall(SC_allocate_tls, size);
+    if (rc < 0 && -rc < EMAXERRNO) {
+        errno = -rc;
+        return MAP_FAILED;
+    }
+    return (void*)rc;
+}
+}