blob: 9b2101c437ee6bc05033613771015f507b824fcf [file] [log] [blame]
/*
* Copyright 2017, Data61
* Commonwealth Scientific and Industrial Research Organisation (CSIRO)
* ABN 41 687 119 230.
*
* This software may be distributed and modified according to the terms of
* the BSD 2-Clause license. Note that NO WARRANTY is provided.
* See "LICENSE_BSD2.txt" for details.
*
* @TAG(DATA61_BSD)
*/
#include <sel4debug/debug.h>
#include <sel4/sel4.h>
#include <stdarg.h>
#include <stdio.h>
int
debug_safe_printf(const char *format, ...)
{
seL4_IPCBuffer shadow_buffer; /* XXX: Should we avoid allocating
* this large struct on the stack?
*/
/* Assume that the standard printf may clobber the IPC buffer, so save it
* before.
*/
shadow_buffer = *(seL4_GetIPCBuffer());
/* Copied from printf: */
int ret;
va_list ap;
va_start(ap, format);
ret = vfprintf(stdout, format, ap);
va_end(ap);
/* Now restore the IPC buffer. */
*(seL4_GetIPCBuffer()) = shadow_buffer;
return ret;
}