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This adds a port to Linux on the IBM Z platform (a.k.a s390x). It only supports the 64-bit ABI. Most functionality is working and all the tests pass with the exception of the coredump tests*. Unwinding is only supported if DWARF unwind information is present. libunwind can't currently make use of the backchain (if present). The getcontext/setcontext functions only preserve/restore a subset of registers. Currently this only consists of callee-saved registers and some parameter registers. Vector registers and access registers are not saved (and aren't callee- saved) by getcontext and cannot currently be modified. They will however be restored unmodified after resuming a context from a signal handler. There is no special libunwind support for setjmp, the functionality is emulated using glibc (I think all the ports do this for modern Linux kernels). * Unwinding on s390x requires floating point register access which the coredump library doesn't currently support.
53 lines
2 KiB
C
53 lines
2 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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Modified for x86_64 by Max Asbock <masbock@us.ibm.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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/* copy of include/tdep-x86/dwarf-config.h, modified slightly for x86-64
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some consolidation is possible here */
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#ifndef dwarf_config_h
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#define dwarf_config_h
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/* derived from DWARF register mappings in Z ELF ABI */
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#define DWARF_NUM_PRESERVED_REGS 66
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#define DWARF_REGNUM_MAP_LENGTH DWARF_NUM_PRESERVED_REGS
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/* Return TRUE if the ADDR_SPACE uses big-endian byte-order. */
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#define dwarf_is_big_endian(addr_space) 1
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/* Convert a pointer to a dwarf_cursor structure to a pointer to
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unw_cursor_t. */
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#define dwarf_to_cursor(c) ((unw_cursor_t *) (c))
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typedef struct dwarf_loc
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{
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unw_word_t val;
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unw_word_t type; /* see S390X_LOC_TYPE_* macros. */
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}
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dwarf_loc_t;
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#endif /* dwarf_config_h */
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