kernel/fiasco/src/kern/ia32/64/thread-dbf.cpp

   1 INTERFACE[amd64]:
   2
   3 EXTENSION class Thread
   4 {
   5 private:
   6   static void handle_double_fault (Trap_state *) asm ("thread_handle_double_fault");
   7
   8 public:
   9   static bool may_enter_jdb;
  10 };
  11
  12
  13 IMPLEMENTATION[amd64]:
  14
  15 #include <cstdio>
  16 #include "cpu.h"
  17 #include "kernel_console.h"
  18 #include "processor.h"
  19 #include "reset.h"
  20 #include "trap_state.h"
  21 #include "tss.h"
  22 #include "watchdog.h"
  23
  24
  25 bool Thread::may_enter_jdb = false;
  26
  27 IMPLEMENT
  28 void
  29 Thread::handle_double_fault (Trap_state *ts)
  30 {
  31   int c;
  32
  33   Watchdog::disable();
  34      printf ("\n\033[1;31mDOUBLE FAULT!\033[m\n"
  35              "RAX=%016lx  RSI=%016lx\n"
  36              "RBX=%016lx  RDI=%016lx\n"
  37              "RCX=%016lx  RBP=%016lx\n"
  38              "RDX=%016lx  RSP=%016lx\n"
  39              "R8= %016lx  R9= %016lx\n"
  40              "R10=%016lx  R11=%016lx\n"
  41              "R12=%016lx  R13=%016lx\n"
  42              "R14=%016lx  R15=%016lx\n"
  43              "RIP %016lx  RFLAGS %016lx\n"
  44              "CS %04lx    SS %04lx\n\n",
  45              ts->_ax, ts->_si,
  46              ts->_bx, ts->_di,
  47              ts->_cx, ts->_bp,
  48              ts->_dx, ts->sp(),
  49              ts->_r8,  ts->_r9,
  50              ts->_r10, ts->_r11,
  51              ts->_r12, ts->_r13,
  52              ts->_r14, ts->_r15,
  53              ts->ip(), ts->flags(),
  54              ts->cs() & 0xffff, ts->ss() & 0xffff);
  55   if (may_enter_jdb)
  56     {
  57       puts ("Return reboots, \"k\" tries to enter the L4 kernel debugger...");
  58
  59       while ((c=Kconsole::console()->getchar(false)) == -1)
  60         Proc::pause();
  61
  62       if (c == 'k' || c == 'K')
  63         {
  64              nested_trap_handler(ts,0); // XXX: 0 is possibly the wrong CPU
  65         }
  66     }
  67   else
  68     {
  69       puts ("Return reboots");
  70       while ((Kconsole::console()->getchar(false)) == -1)
  71         Proc::pause();
  72     }
  73
  74   puts ("\033[1mRebooting...\033[0m");
  75   platform_reset();
  76 }
  77
  78