zero_stream: Convert global buffer back to stack buffer

This is possible because #45 (secure buffer copies) is implemented now.

1 files changed, 1 insertions, 9 deletions

diff --git a/examples/zero_stream/src/main.zig b/examples/zero_stream/src/main.zig
index 1536157..8e529cb 100644
--- a/examples/zero_stream/src/main.zig
+++ b/examples/zero_stream/src/main.zig
@@ -9,15 +9,6 @@ const Result = extern struct {
     status: usize,
 };
 
-// The buffer has to be a global variable
-// because a stack buffer would be mapped to different physical memory addresses
-// in the driver thread compared to the main thread due to paging
-// (because each thread has its own stack).
-// This will be fixed in a future kernel version because the same root cause
-// also prevents a distinct driver process from accessing the memory
-// (its attempt to modify the buffer would raise a page fault).
-var buf = [8]u8{ 1, 2, 3, 4, 5, 6, 7, 8 };
-
 export fn _start() void {
     main();
 }
@@ -73,6 +64,7 @@ pub fn main() void {
         : "a7"
     );
 
+    var buf = [8]u8{ 1, 2, 3, 4, 5, 6, 7, 8 };
     asm volatile (
         \\ li a7, 100009
         \\ ecall