arch/all-pc/kernel/_bug.c

   1 /*
   2     Copyright © 1995-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6 */
   7
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10
  11 #include <kernel_base.h>
  12 #include <kernel_debug.h>
  13
  14 #if defined(__AROSEXEC_SMP__)
  15 #include <aros/atomic.h>
  16 #include <asm/cpu.h>
  17 extern volatile ULONG   safedebug;
  18 #endif
  19
  20 #include <proto/exec.h>
  21
  22 static int UniPutC(int c, struct KernelBase *KernelBase);
  23
  24 /*
  25  * This is internal version of KrnBug(), to be called directly by bug() macro.
  26  * If you want to reimplement it, override this file.
  27  * However, generally you won't want to do this, because __vcformat() supports
  28  * AROS-specific extensions, like %b, which are unlikely supported by your host OS.
  29  */
  30 int krnBug(const char *format, va_list args, APTR kernelBase)
  31 {
  32     int retval = 0;
  33
  34 #if defined(__AROSEXEC_SMP__)
  35     if (safedebug & 1)
  36     {
  37         while (bit_test_and_set_long((ULONG*)&safedebug, 1)) { asm volatile("pause"); };
  38     }
  39 #endif
  40
  41     retval = __vcformat(kernelBase, (int (*)(int, void *))UniPutC, format, args);
  42
  43 #if defined(__AROSEXEC_SMP__)
  44     if (safedebug & 1)
  45     {
  46         __AROS_ATOMIC_AND_L(safedebug, ~(1 << 1));
  47     }
  48 #endif
  49
  50     return retval;
  51 }
  52
  53 /*
  54  * This is yet another character stuffing callback for debug output. This one unifies the output
  55  * with debug output from outside the kernel where possible, allowing kernel debug output to be
  56  * redirected alongside that other output (e.g. with Sashimi or Bifteck).
  57  */
  58 static int UniPutC(int c, struct KernelBase *KernelBase)
  59 {
  60     int result;
  61
  62     if (SysBase != NULL)
  63     {
  64         RawPutChar(c);
  65         result = 1;
  66     }
  67     else
  68         result = krnPutC(c, KernelBase);
  69
  70     return result;
  71 }