From 928f2662d1469e815a7e32e04d6c68bae4a61c14 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Fri, 12 Mar 2021 19:40:49 +0100
Subject: Added user stack pushing

---
 kernel/features/proc.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'kernel/features')

diff --git a/kernel/features/proc.c b/kernel/features/proc.c
index 38d88f8..e4b5105 100644
--- a/kernel/features/proc.c
+++ b/kernel/features/proc.c
@@ -437,6 +437,18 @@ static u8 procfs_ready(const char *path, struct device *dev)
 	return 1;
 }
 
+static void proc_stack_push(struct proc *proc, u32 data)
+{
+	struct page_dir *prev;
+	memory_backup_dir(&prev);
+	memory_switch_dir(proc->page_dir);
+
+	proc->regs.useresp -= sizeof(data);
+	*(u32 *)proc->regs.useresp = data;
+
+	memory_switch_dir(prev);
+}
+
 extern void proc_jump_userspace(void);
 
 u32 _esp, _eip;
-- 
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