arch/all-pc/boot/grub2-aros/grub-core/lib/i386/backtrace.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/misc.h>
  20 #include <grub/command.h>
  21 #include <grub/err.h>
  22 #include <grub/dl.h>
  23 #include <grub/mm.h>
  24 #include <grub/term.h>
  25 #include <grub/backtrace.h>
  26
  27 #define MAX_STACK_FRAME 102400
  28
  29 void
  30 grub_backtrace_pointer (void *ebp)
  31 {
  32   void *ptr, *nptr;
  33   unsigned i;
  34
  35   ptr = ebp;
  36   while (1)
  37     {
  38       grub_printf ("%p: ", ptr);
  39       grub_backtrace_print_address (((void **) ptr)[1]);
  40       grub_printf (" (");
  41       for (i = 0; i < 2; i++)
  42         grub_printf ("%p,", ((void **)ptr) [i + 2]);
  43       grub_printf ("%p)\n", ((void **)ptr) [i + 2]);
  44       nptr = *(void **)ptr;
  45       if (nptr < ptr || (void **) nptr - (void **) ptr > MAX_STACK_FRAME
  46           || nptr == ptr)
  47         {
  48           grub_printf ("Invalid stack frame at %p (%p)\n", ptr, nptr);
  49           break;
  50         }
  51       ptr = nptr;
  52     }
  53 }
  54
  55 void
  56 grub_backtrace (void)
  57 {
  58 #ifdef __x86_64__
  59   asm volatile ("movq %rbp, %rdi\n"
  60                 "call " EXT_C("grub_backtrace_pointer"));
  61 #else
  62   asm volatile ("movl %ebp, %eax\n"
  63                 "call " EXT_C("grub_backtrace_pointer"));
  64 #endif
  65 }
  66