Add some simple write buffering to LibC's stdio.

Plumb it all the way to the VirtualConsole. Also fix /bin/cat to write()
the whole chunks we get from read() directly to stdout.

1 files changed, 6 insertions, 2 deletions

diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index c7ecaa01be..19aec8c7bf 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -29,15 +29,19 @@
 #define VALIDATE_USER_READ(b, s) \
     do { \
         LinearAddress laddr((dword)(b)); \
-        if (!validate_user_read(laddr) || !validate_user_read(laddr.offset((s) - 1))) \
+        if (!validate_user_read(laddr) || !validate_user_read(laddr.offset((s) - 1))) { \
+            dbgprintf("Bad read address passed to syscall: %p +%u\n", laddr.get(), (s)); \
             return -EFAULT; \
+        } \
     } while(0)
 
 #define VALIDATE_USER_WRITE(b, s) \
     do { \
         LinearAddress laddr((dword)(b)); \
-        if (!validate_user_write(laddr) || !validate_user_write(laddr.offset((s) - 1))) \
+        if (!validate_user_write(laddr) || !validate_user_write(laddr.offset((s) - 1))) { \
+            dbgprintf("Bad write address passed to syscall: %p +%u\n", laddr.get(), (s)); \
             return -EFAULT; \
+        } \
     } while(0)
 
 static const DWORD defaultStackSize = 16384;