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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/misc.h>
#include <grub/command.h>
#include <grub/err.h>
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/term.h>
#include <grub/backtrace.h>
#define MAX_STACK_FRAME 102400
void
grub_backtrace_pointer (void *ebp)
{
void *ptr, *nptr;
unsigned i;
ptr = ebp;
while (1)
{
grub_printf ("%p: ", ptr);
grub_backtrace_print_address (((void **) ptr)[1]);
grub_printf (" (");
for (i = 0; i < 2; i++)
grub_printf ("%p,", ((void **)ptr) [i + 2]);
grub_printf ("%p)\n", ((void **)ptr) [i + 2]);
nptr = *(void **)ptr;
if (nptr < ptr || (void **) nptr - (void **) ptr > MAX_STACK_FRAME
|| nptr == ptr)
{
grub_printf ("Invalid stack frame at %p (%p)\n", ptr, nptr);
break;
}
ptr = nptr;
}
}
void
grub_backtrace (void)
{
#ifdef __x86_64__
asm volatile ("movq %%rbp, %%rdi\n"
"callq *%%rax": :"a"(grub_backtrace_pointer));
#else
asm volatile ("movl %%ebp, %%eax\n"
"calll *%%ecx": :"c"(grub_backtrace_pointer));
#endif
}
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