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54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2002 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "unwind_i.h"
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PROTECTED int
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unw_is_signal_frame (unw_cursor_t *cursor)
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{
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struct cursor *c = (struct cursor *) cursor;
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struct ia64_state_record sr;
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int ret;
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/* Crude and slow, but we need to peek ahead into the unwind
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descriptors to find out if the current IP is inside the signal
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trampoline. */
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ret = ia64_fetch_proc_info (c, c->ip, 1);
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if (ret < 0)
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return ret;
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ret = ia64_create_state_record (c, &sr);
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if (ret < 0)
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return ret;
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/* For now, we assume that any non-zero abi marker implies a signal frame.
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This should get us pretty far. */
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ret = (sr.abi_marker != 0);
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ia64_free_state_record (&sr);
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Debug (1, "(cursor=%p, ip=0x%016lx) -> %d\n", c, c->ip, ret);
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return ret;
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}
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