From 96f41ff64d8113307f1b60d2eb6852423db34d14 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Mon, 18 Jul 2022 23:55:58 +0200
Subject: 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
---
 src/shared/execbuf.h  | 5 +++++
 src/shared/syscalls.h | 5 +++++
 2 files changed, 10 insertions(+)
 create mode 100644 src/shared/execbuf.h

(limited to 'src/shared')

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);
-- 
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