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86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
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/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2003 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 <string.h>
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#include <stdlib.h>
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#include "init.h"
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#include "unwind_i.h"
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#ifdef UNW_REMOTE_ONLY
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PROTECTED int
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unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
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{
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return -UNW_EINVAL;
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}
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#else /* !UNW_REMOTE_ONLY */
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PROTECTED int
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unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
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{
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struct cursor *c = (struct cursor *) cursor;
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unw_word_t sol;
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if (tdep_needs_initialization)
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tdep_init ();
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Debug (2, "(cursor=%p)\n", c);
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#ifdef __hpux
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{
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int ret;
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c->as = unw_local_addr_space;
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c->as_arg = uc;
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if ((ret = common_init (c)) < 0)
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return ret;
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/* On HP-UX, the context created by getcontext() points to the
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getcontext() system call stub. Step over it: */
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return unw_step (cursor);
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}
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#else
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/* The bsp value stored by getcontext() points to the *end* of the
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register frame of the initial function. We correct for this by
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storing the adjusted value in sc_rbs_base, which isn't used by
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getcontext()/setcontext(). We can be certain that the entire
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frame is stored in a contiguous rbs-area because the frame didn't
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become part of the dirty partition until getcontext() was called
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and we know that getcontext() doesn't switch the register-backing
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store. */
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sol = (uc->uc_mcontext.sc_ar_pfs >> 7) & 0x7f;
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uc->uc_mcontext.sc_rbs_base = ia64_rse_skip_regs (uc->uc_mcontext.sc_ar_bsp,
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-sol);
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#endif
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c->as = unw_local_addr_space;
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c->as_arg = uc;
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return common_init (c);
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}
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#endif /* !UNW_REMOTE_ONLY */
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