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3842dac733
reading of .debug_frame sections (used in lieu of .eh_frame sections when they're not available).
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2008 CodeSourcery
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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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#include "offsets.h"
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PROTECTED int
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unw_step (unw_cursor_t *cursor)
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{
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struct cursor *c = (struct cursor *) cursor;
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int ret;
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Debug (1, "(cursor=%p)\n", c);
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/* Try DWARF-based unwinding... this is the only method likely to work for
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ARM. */
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ret = dwarf_step (&c->dwarf);
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if (unlikely (ret == -UNW_ESTOPUNWIND))
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return ret;
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/* Dwarf unwinding didn't work, stop. */
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if (unlikely (ret < 0))
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return 0;
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return (c->dwarf.ip == 0) ? 0 : 1;
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}
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