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8afc33ce9f
By default, the start_ip_offset in libunwind's table_entry struct is relative to the unw_dyn_info_t's segbase. This presents a problem for us in conjunction with using LLVM's MCJIT because it likes to spread text sections and the corresponding eh_frame sections quite far apart. This represents my attempt to support this use case in the simplest manner that is backwards compatible, by adding a new format kind (UNW_INFO_FORMAT_REMOTE_TABLE2) that indicates that the `start_ip_offset` should be interpreted as relative to `start_ip` rather than segbase.
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2002, 2005 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_i.h"
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HIDDEN int
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unwi_extract_dynamic_proc_info (unw_addr_space_t as, unw_word_t ip,
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unw_proc_info_t *pi, unw_dyn_info_t *di,
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int need_unwind_info, void *arg)
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{
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pi->start_ip = di->start_ip;
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pi->end_ip = di->end_ip;
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pi->gp = di->gp;
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pi->format = di->format;
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switch (di->format)
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{
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case UNW_INFO_FORMAT_DYNAMIC:
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pi->handler = di->u.pi.handler;
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pi->lsda = 0;
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pi->flags = di->u.pi.flags;
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pi->unwind_info_size = 0;
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if (need_unwind_info)
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pi->unwind_info = di;
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else
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pi->unwind_info = NULL;
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return 0;
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case UNW_INFO_FORMAT_TABLE:
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case UNW_INFO_FORMAT_REMOTE_TABLE:
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case UNW_INFO_FORMAT_IP_OFFSET:
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#ifdef tdep_search_unwind_table
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/* call platform-specific search routine: */
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return tdep_search_unwind_table (as, ip, di, pi, need_unwind_info, arg);
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#else
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/* fall through */
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#endif
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default:
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break;
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}
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return -UNW_EINVAL;
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}
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