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https://github.com/tobast/libunwind-eh_elf.git
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16e98c8cf3
Set local_addr_space.big_endian flag according to current target endianness. Before it was set by memset to 0, which corresponds to little endian and it worked perfectly fine for aarch64. But it breaks aarch64_be because dwarf_readu16, dwarf_readu32, etc functions do not read values correctly since they operate with wrong idea about current target endianness. Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
188 lines
5.1 KiB
C
188 lines
5.1 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2008 CodeSourcery
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Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com>
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Copyright (C) 2013 Linaro Limited
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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 <stdlib.h>
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#include <string.h>
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#include "unwind_i.h"
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#ifdef UNW_REMOTE_ONLY
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/* unw_local_addr_space is a NULL pointer in this case. */
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PROTECTED unw_addr_space_t unw_local_addr_space;
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#else /* !UNW_REMOTE_ONLY */
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static struct unw_addr_space local_addr_space;
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PROTECTED unw_addr_space_t unw_local_addr_space = &local_addr_space;
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static inline void *
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uc_addr (ucontext_t *uc, int reg)
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{
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if (reg >= UNW_AARCH64_X0 && reg <= UNW_AARCH64_V31)
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return &uc->uc_mcontext.regs[reg];
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else
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return NULL;
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}
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# ifdef UNW_LOCAL_ONLY
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HIDDEN void *
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tdep_uc_addr (ucontext_t *uc, int reg)
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{
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return uc_addr (uc, reg);
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}
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# endif /* UNW_LOCAL_ONLY */
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HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
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/* XXX fix me: there is currently no way to locate the dyn-info list
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by a remote unwinder. On ia64, this is done via a special
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unwind-table entry. Perhaps something similar can be done with
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DWARF2 unwind info. */
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static void
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put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
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{
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/* it's a no-op */
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}
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static int
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get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
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void *arg)
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{
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*dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
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return 0;
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}
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static int
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access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
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void *arg)
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{
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if (write)
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{
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Debug (16, "mem[%lx] <- %lx\n", addr, *val);
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*(unw_word_t *) addr = *val;
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}
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else
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{
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*val = *(unw_word_t *) addr;
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Debug (16, "mem[%lx] -> %lx\n", addr, *val);
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}
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return 0;
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}
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static int
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access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
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void *arg)
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{
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unw_word_t *addr;
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ucontext_t *uc = arg;
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if (unw_is_fpreg (reg))
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goto badreg;
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if (!(addr = uc_addr (uc, reg)))
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goto badreg;
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if (write)
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{
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*(unw_word_t *) addr = *val;
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Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
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}
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else
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{
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*val = *(unw_word_t *) addr;
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Debug (12, "%s -> %lx\n", unw_regname (reg), *val);
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}
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return 0;
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badreg:
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Debug (1, "bad register number %u\n", reg);
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return -UNW_EBADREG;
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}
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static int
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access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
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int write, void *arg)
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{
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ucontext_t *uc = arg;
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unw_fpreg_t *addr;
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if (!unw_is_fpreg (reg))
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goto badreg;
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if (!(addr = uc_addr (uc, reg)))
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goto badreg;
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if (write)
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{
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Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
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((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
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*(unw_fpreg_t *) addr = *val;
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}
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else
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{
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*val = *(unw_fpreg_t *) addr;
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Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
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((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
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}
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return 0;
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badreg:
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Debug (1, "bad register number %u\n", reg);
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/* attempt to access a non-preserved register */
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return -UNW_EBADREG;
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}
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static int
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get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
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char *buf, size_t buf_len, unw_word_t *offp,
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void *arg)
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{
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return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
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}
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HIDDEN void
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aarch64_local_addr_space_init (void)
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{
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memset (&local_addr_space, 0, sizeof (local_addr_space));
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local_addr_space.caching_policy = UNW_CACHE_GLOBAL;
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local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
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local_addr_space.acc.put_unwind_info = put_unwind_info;
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local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
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local_addr_space.acc.access_mem = access_mem;
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local_addr_space.acc.access_reg = access_reg;
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local_addr_space.acc.access_fpreg = access_fpreg;
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local_addr_space.acc.resume = aarch64_local_resume;
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local_addr_space.acc.get_proc_name = get_static_proc_name;
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local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
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unw_flush_cache (&local_addr_space, 0, 0);
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}
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#endif /* !UNW_REMOTE_ONLY */
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