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52 lines
2 KiB
C
52 lines
2 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2003 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 <libunwind.h>
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#include <setjmp.h>
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/* Why use K&R syntax here? setjmp() is often a macro and that
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expands into a call to, say, __setjmp() and we need to define the
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libunwind-version of setjmp() with the name of the actual function.
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Using K&R syntax lets us keep the setjmp() macro while keeping the
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syntax valid... This trick works provided setjmp() doesn't do
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anything other than a function call. */
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int
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setjmp (env)
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jmp_buf env;
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{
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void **wp = (void **) env;
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#if UNW_TARGET_IA64
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wp[0] = __builtin_dwarf_cfa () - 16;
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wp[1] = __builtin_ia64_bsp ();
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#else
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/* this should work on most platforms, but may not be
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performance-optimal; check the code! */
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wp[0] = __builtin_frame_address (0);
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wp[1] = (void *) (uintptr_t) 0;
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#endif
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return 0;
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}
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