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