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- /* libunwind - a platform-independent unwind library
- Copyright (C) 2008 CodeSourcery
- This file is part of libunwind.
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- "Software"), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
- The above copyright notice and this permission notice shall be
- included in all copies or substantial portions of the Software.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
- #include <stdlib.h>
- #include <string.h>
- #include "unwind_i.h"
- #ifdef UNW_REMOTE_ONLY
- /* unw_local_addr_space is a NULL pointer in this case. */
- PROTECTED unw_addr_space_t unw_local_addr_space;
- #else /* !UNW_REMOTE_ONLY */
- static struct unw_addr_space local_addr_space;
- PROTECTED unw_addr_space_t unw_local_addr_space = &local_addr_space;
- /* Return the address of the 64-bit slot in UC for REG (even for o32,
- where registers are 32-bit, the slots are still 64-bit). */
- static inline void *
- uc_addr (ucontext_t *uc, int reg)
- {
- if (reg >= UNW_MIPS_R0 && reg < UNW_MIPS_R0 + 32)
- return &uc->uc_mcontext.gregs[reg - UNW_MIPS_R0];
- else
- return NULL;
- }
- # ifdef UNW_LOCAL_ONLY
- HIDDEN void *
- tdep_uc_addr (ucontext_t *uc, int reg)
- {
- char *addr = uc_addr (uc, reg);
- if (reg >= UNW_MIPS_R0 && reg <= UNW_MIPS_R31
- && tdep_big_endian (unw_local_addr_space)
- && unw_local_addr_space->abi == UNW_MIPS_ABI_O32)
- addr += 4;
- return addr;
- }
- # endif /* UNW_LOCAL_ONLY */
- HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
- /* XXX fix me: there is currently no way to locate the dyn-info list
- by a remote unwinder. On ia64, this is done via a special
- unwind-table entry. Perhaps something similar can be done with
- DWARF2 unwind info. */
- static void
- put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
- {
- /* it's a no-op */
- }
- static int
- get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
- void *arg)
- {
- *dyn_info_list_addr = (unw_word_t) (intptr_t) &_U_dyn_info_list;
- return 0;
- }
- static int
- access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
- void *arg)
- {
- if (write)
- {
- Debug (16, "mem[%llx] <- %llx\n", (long long) addr, (long long) *val);
- *(unw_word_t *) (intptr_t) addr = *val;
- }
- else
- {
- *val = *(unw_word_t *) (intptr_t) addr;
- Debug (16, "mem[%llx] -> %llx\n", (long long) addr, (long long) *val);
- }
- return 0;
- }
- static int
- access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
- void *arg)
- {
- unw_word_t *addr;
- ucontext_t *uc = arg;
- if (unw_is_fpreg (reg))
- goto badreg;
- Debug (16, "reg = %s\n", unw_regname (reg));
- if (!(addr = uc_addr (uc, reg)))
- goto badreg;
- if (write)
- {
- *(unw_word_t *) (intptr_t) addr = (mips_reg_t) *val;
- Debug (12, "%s <- %llx\n", unw_regname (reg), (long long) *val);
- }
- else
- {
- *val = (mips_reg_t) *(unw_word_t *) (intptr_t) addr;
- Debug (12, "%s -> %llx\n", unw_regname (reg), (long long) *val);
- }
- return 0;
- badreg:
- Debug (1, "bad register number %u\n", reg);
- return -UNW_EBADREG;
- }
- static int
- access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
- int write, void *arg)
- {
- ucontext_t *uc = arg;
- unw_fpreg_t *addr;
- if (!unw_is_fpreg (reg))
- goto badreg;
- if (!(addr = uc_addr (uc, reg)))
- goto badreg;
- if (write)
- {
- Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
- ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
- *(unw_fpreg_t *) (intptr_t) addr = *val;
- }
- else
- {
- *val = *(unw_fpreg_t *) (intptr_t) addr;
- Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
- ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
- }
- return 0;
- badreg:
- Debug (1, "bad register number %u\n", reg);
- /* attempt to access a non-preserved register */
- return -UNW_EBADREG;
- }
- static int
- get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
- char *buf, size_t buf_len, unw_word_t *offp,
- void *arg)
- {
- return elf_w (get_proc_name) (as, getpid (), ip, buf, buf_len, offp);
- }
- HIDDEN void
- mips_local_addr_space_init (void)
- {
- memset (&local_addr_space, 0, sizeof (local_addr_space));
- local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
- #if _MIPS_SIM == _ABIO32
- local_addr_space.abi = UNW_MIPS_ABI_O32;
- #elif _MIPS_SIM == _ABIN32
- local_addr_space.abi = UNW_MIPS_ABI_N32;
- #elif _MIPS_SIM == _ABI64
- local_addr_space.abi = UNW_MIPS_ABI_N64;
- #else
- # error Unsupported ABI
- #endif
- local_addr_space.addr_size = sizeof (void *);
- local_addr_space.caching_policy = UNW_CACHE_GLOBAL;
- local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
- local_addr_space.acc.put_unwind_info = put_unwind_info;
- local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
- local_addr_space.acc.access_mem = access_mem;
- local_addr_space.acc.access_reg = access_reg;
- local_addr_space.acc.access_fpreg = access_fpreg;
- local_addr_space.acc.resume = 0; /* mips_local_resume? FIXME! */
- local_addr_space.acc.get_proc_name = get_static_proc_name;
- unw_flush_cache (&local_addr_space, 0, 0);
- }
- #endif /* !UNW_REMOTE_ONLY */
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