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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Return backtrace of current program state.
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Copyright (C) 2008-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David S. Miller <davem@davemloft.net>
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://www.gnu.org/licenses/>. */
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#include <execinfo.h>
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#include <stddef.h>
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#include <bp-checks.h>
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#include <sysdep.h>
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struct layout
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{
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unsigned long locals[8];
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unsigned long ins[6];
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unsigned long next;
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void *__unbounded return_address;
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};
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int
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__backtrace (void **array, int size)
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{
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struct layout *current;
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unsigned long fp;
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int count;
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asm volatile ("flushw");
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asm volatile ("mov %%fp, %0" : "=r"(fp));
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current = (struct layout *__unbounded) (fp + STACK_BIAS);
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current = BOUNDED_1 (current);
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for (count = 0; count < size; count++)
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{
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array[count] = current->return_address;
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if (!current->next)
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break;
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current = (struct layout *__unbounded) (current->next + STACK_BIAS);
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current = BOUNDED_1 (current);
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}
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return count;
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}
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weak_alias (__backtrace, backtrace)
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libc_hidden_def (__backtrace)
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