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https://github.com/tobast/libunwind-eh_elf.git
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95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
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/* libunwind - a platform-independent unwind library
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Copyright (C) 2008 CodeSourcery
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Copyright (C) 2014 Tilera Corp.
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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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#include <ucontext.h>
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#ifndef UNW_REMOTE_ONLY
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HIDDEN inline int
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tilegx_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
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{
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int i;
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struct cursor *c = (struct cursor *) cursor;
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ucontext_t *uc = c->dwarf.as_arg;
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Debug (1, "(cursor=%p\n", c);
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return setcontext(uc);
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}
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#endif /* !UNW_REMOTE_ONLY */
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static inline void
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establish_machine_state (struct cursor *c)
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{
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unw_addr_space_t as = c->dwarf.as;
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void *arg = c->dwarf.as_arg;
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unw_fpreg_t fpval;
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unw_word_t val;
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int reg;
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Debug (8, "copying out cursor state\n");
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for (reg = 0; reg <= UNW_REG_LAST; ++reg)
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{
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Debug (16, "copying %s %d\n", unw_regname (reg), reg);
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if (unw_is_fpreg (reg))
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{
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Debug (1, "no fp!");
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abort ();
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}
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else
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{
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if (tdep_access_reg (c, reg, &val, 0) >= 0)
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as->acc.access_reg (as, reg, &val, 1, arg);
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}
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}
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}
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PROTECTED int
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unw_resume (unw_cursor_t *cursor)
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{
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struct cursor *c = (struct cursor *) cursor;
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Debug (1, "(cursor=%p) ip=0x%lx\n", c, c->dwarf.ip);
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if (!c->dwarf.ip)
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{
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/* This can happen easily when the frame-chain gets truncated
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due to bad or missing unwind-info. */
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Debug (1, "refusing to resume execution at address 0\n");
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return -UNW_EINVAL;
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}
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establish_machine_state (c);
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return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
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c->dwarf.as_arg);
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}
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