- return frame_id_build (frv_unwind_sp (gdbarch, next_frame),
- frame_pc_unwind (next_frame));
-}
-
-/* Signal trampolines. */
-
-static struct frv_unwind_cache *
-frv_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache)
-{
- struct frv_unwind_cache *cache;
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- CORE_ADDR addr;
- char buf[4];
- int regno;
- CORE_ADDR sc_addr_cache_val = 0;
-
- if (*this_cache)
- return *this_cache;
-
- cache = FRAME_OBSTACK_ZALLOC (struct frv_unwind_cache);
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
-
- frame_unwind_register (next_frame, sp_regnum, buf);
- cache->base = extract_unsigned_integer (buf, sizeof buf);
-
- for (regno = 0; regno < frv_num_regs; regno++)
- {
- cache->saved_regs[regno].addr
- = tdep->sigcontext_reg_addr (next_frame, regno, &sc_addr_cache_val);
- }
-
-
- if (cache->saved_regs[sp_regnum].addr != -1
- && target_read_memory (cache->saved_regs[sp_regnum].addr,
- buf, sizeof buf) == 0)
- {
- cache->prev_sp = extract_unsigned_integer (buf, sizeof buf);
-
- /* Now that we've bothered to read it out of memory, save the
- prev frame's SP value in the cache. */
- trad_frame_set_value (cache->saved_regs, sp_regnum, cache->prev_sp);
- }
- else
- {
- warning ("Can't read SP value from sigtramp frame");
- }
-
- *this_cache = cache;
- return cache;
-}
-
-static void
-frv_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
- struct frame_id *this_id)
-{
- struct frv_unwind_cache *cache =
- frv_sigtramp_frame_cache (next_frame, this_cache);
-
- (*this_id) = frame_id_build (cache->base, frame_pc_unwind (next_frame));
-}
-
-static void
-frv_sigtramp_frame_prev_register (struct frame_info *next_frame,
- void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
-{
- /* Make sure we've initialized the cache. */
- frv_sigtramp_frame_cache (next_frame, this_cache);
-
- frv_frame_prev_register (next_frame, this_cache, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
-}
-
-static const struct frame_unwind frv_sigtramp_frame_unwind =
-{
- SIGTRAMP_FRAME,
- frv_sigtramp_frame_this_id,
- frv_sigtramp_frame_prev_register
-};
-
-static const struct frame_unwind *
-frv_sigtramp_frame_sniffer (struct frame_info *next_frame)
-{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
-
- /* We shouldn't even bother to try if the OSABI didn't register
- a sigcontext_reg_addr handler. */
- if (!gdbarch_tdep (current_gdbarch)->sigcontext_reg_addr)
- return NULL;
-
- find_pc_partial_function (pc, &name, NULL, NULL);
- if (DEPRECATED_PC_IN_SIGTRAMP (pc, name))
- return &frv_sigtramp_frame_unwind;
-
- return NULL;