Merge branch 'dev04'

1 files changed, 40 insertions, 0 deletions

diff --git a/lib/include/syscalls.h b/lib/include/syscalls.h
new file mode 100644
index 0000000..7808e98
--- /dev/null
+++ b/lib/include/syscalls.h
@@ -0,0 +1,40 @@
+// Copyright (c) 2021 Johannes Stoelp
+
+#pragma once
+
+#include <stddef.h>     // size_t
+#include <sys/types.h>  // ssize_t, off_t, ...
+
+extern int dynld_errno;
+
+// Syscall definitions taken from corresponding man pages, eg
+//   open(2)
+//   read(2)
+//   ...
+
+#define O_RDONLY 00
+int open(const char* path, int flags);
+int close(int fd);
+
+#define F_OK 0
+#define R_OK 4
+int access(const char* path, int mode);
+
+ssize_t write(int fd, const void* buf, size_t count);
+ssize_t read(int fd, void* buf, size_t count);
+ssize_t pread(int fd, void* buf, size_t count, off_t offset);
+
+// mmap - prot:
+#define PROT_READ  0x1
+#define PROT_WRITE 0x2
+#define PROT_EXEC  0x4
+// mmap - flags:
+#define MAP_PRIVATE   0x2
+#define MAP_ANONYMOUS 0x20
+#define MAP_FIXED     0x10
+// mmap - ret:
+#define MAP_FAILED ((void*)-1)
+void* mmap(void* addr, size_t length, int prot, int flags, int fd, off_t offset);
+int munmap(void* addr, size_t length);
+
+void _exit(int status);