syscalls: implement execbuf

i have been planning to implement something like this for a while now.
it should be faster when doing consecutive syscalls (to be tested).

it will also be helpful in writing the elf loader

2 files changed, 10 insertions, 0 deletions

diff --git a/src/shared/execbuf.h b/src/shared/execbuf.h
new file mode 100644
index 0000000..70ea35c
--- /dev/null
+++ b/src/shared/execbuf.h
@@ -0,0 +1,5 @@
+#pragma once
+/* the instruction format is bound to change, atm it's extremely inefficient */
+
+/* takes 5 arguments */
+#define EXECBUF_SYSCALL 0xF0000001
diff --git a/src/shared/syscalls.h b/src/shared/syscalls.h
index 2b8bd14..e3b879e 100644
--- a/src/shared/syscalls.h
+++ b/src/shared/syscalls.h
@@ -28,6 +28,8 @@ enum {
 	_SYSCALL_MEMFLAG,
 	_SYSCALL_PIPE,
 
+	_SYSCALL_EXECBUF,
+
 	_SYSCALL_DEBUG_KLOG,
 };
 
@@ -85,4 +87,7 @@ long _syscall_fs_respond(void __user *buf, long ret, int flags);
 void __user *_syscall_memflag(void __user *addr, size_t len, int flags);
 long _syscall_pipe(handle_t __user user_ends[2], int flags);
 
+/* see shared/execbuf.h */
+long _syscall_execbuf(void __user *buf, size_t len);
+
 void _syscall_debug_klog(const void __user *buf, size_t len);