+/* Kernel debugging support. */
+
+static struct sparc_frame_cache *
+sparc64obsd_trapframe_cache (struct frame_info *next_frame, void **this_cache)
+{
+ struct sparc_frame_cache *cache;
+ CORE_ADDR sp, trapframe_addr;
+ int regnum;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = sparc_frame_cache (next_frame, this_cache);
+ gdb_assert (cache == *this_cache);
+
+ sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ trapframe_addr = sp + BIAS + 176;
+
+ cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ cache->saved_regs[SPARC64_STATE_REGNUM].addr = trapframe_addr;
+ cache->saved_regs[SPARC64_PC_REGNUM].addr = trapframe_addr + 8;
+ cache->saved_regs[SPARC64_NPC_REGNUM].addr = trapframe_addr + 16;
+
+ for (regnum = SPARC_G0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
+ cache->saved_regs[regnum].addr =
+ trapframe_addr + 48 + (regnum - SPARC_G0_REGNUM) * 8;
+
+ return cache;
+}
+
+static void
+sparc64obsd_trapframe_this_id (struct frame_info *next_frame,
+ void **this_cache, struct frame_id *this_id)
+{
+ struct sparc_frame_cache *cache =
+ sparc64obsd_trapframe_cache (next_frame, this_cache);
+
+ (*this_id) = frame_id_build (cache->base, cache->pc);
+}
+
+static void
+sparc64obsd_trapframe_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, gdb_byte *valuep)
+{
+ struct sparc_frame_cache *cache =
+ sparc64obsd_trapframe_cache (next_frame, this_cache);
+
+ trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
+}
+
+static const struct frame_unwind sparc64obsd_trapframe_unwind =
+{
+ NORMAL_FRAME,
+ sparc64obsd_trapframe_this_id,
+ sparc64obsd_trapframe_prev_register
+};
+
+static const struct frame_unwind *
+sparc64obsd_trapframe_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc;
+ ULONGEST pstate;
+ char *name;
+
+ /* Check whether we are in privileged mode, and bail out if we're not. */
+ pstate = frame_unwind_register_unsigned (next_frame, SPARC64_PSTATE_REGNUM);
+ if ((pstate & SPARC64_PSTATE_PRIV) == 0)
+ return NULL;
+
+ pc = frame_unwind_address_in_block (next_frame, NORMAL_FRAME);
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (name && strcmp (name, "Lslowtrap_reenter") == 0)
+ return &sparc64obsd_trapframe_unwind;
+
+ return NULL;
+}
+\f
+
+/* Threads support. */
+
+/* Offset wthin the thread structure where we can find %fp and %i7. */
+#define SPARC64OBSD_UTHREAD_FP_OFFSET 232
+#define SPARC64OBSD_UTHREAD_PC_OFFSET 240
+
+static void
+sparc64obsd_supply_uthread (struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ CORE_ADDR fp, fp_addr = addr + SPARC64OBSD_UTHREAD_FP_OFFSET;
+ gdb_byte buf[8];
+
+ gdb_assert (regnum >= -1);
+
+ fp = read_memory_unsigned_integer (fp_addr, 8);
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 8, fp);
+ regcache_raw_supply (regcache, SPARC_SP_REGNUM, buf);
+
+ if (regnum == SPARC_SP_REGNUM)
+ return;
+ }
+
+ if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM
+ || regnum == -1)
+ {
+ CORE_ADDR i7, i7_addr = addr + SPARC64OBSD_UTHREAD_PC_OFFSET;
+
+ i7 = read_memory_unsigned_integer (i7_addr, 8);
+ if (regnum == SPARC64_PC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 8, i7 + 8);
+ regcache_raw_supply (regcache, SPARC64_PC_REGNUM, buf);
+ }
+ if (regnum == SPARC64_NPC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 8, i7 + 12);
+ regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, buf);
+ }
+
+ if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM)
+ return;
+ }
+
+ sparc_supply_rwindow (regcache, fp, regnum);
+}
+
+static void
+sparc64obsd_collect_uthread(const struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ CORE_ADDR sp;
+ gdb_byte buf[8];
+
+ gdb_assert (regnum >= -1);
+
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ CORE_ADDR fp_addr = addr + SPARC64OBSD_UTHREAD_FP_OFFSET;
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ write_memory (fp_addr,buf, 8);
+ }
+
+ if (regnum == SPARC64_PC_REGNUM || regnum == -1)
+ {
+ CORE_ADDR i7, i7_addr = addr + SPARC64OBSD_UTHREAD_PC_OFFSET;
+
+ regcache_raw_collect (regcache, SPARC64_PC_REGNUM, buf);
+ i7 = extract_unsigned_integer (buf, 8) - 8;
+ write_memory_unsigned_integer (i7_addr, 8, i7);
+
+ if (regnum == SPARC64_PC_REGNUM)
+ return;
+ }
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 8);
+ sparc_collect_rwindow (regcache, sp, regnum);
+}
+\f