+\f
+
+/* Signal trampolines. */
+
+static void
+m68kobsd_sigtramp_cache_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ CORE_ADDR addr, base, pc;
+ int regnum;
+
+ base = get_frame_register_unsigned (this_frame, M68K_SP_REGNUM);
+
+ /* The 'addql #4,%sp' instruction at offset 8 adjusts the stack
+ pointer. Adjust the frame base accordingly. */
+ pc = get_frame_register_unsigned (this_frame, M68K_PC_REGNUM);
+ if ((pc - func) > 8)
+ base -= 4;
+
+ /* Get frame pointer, stack pointer, program counter and processor
+ state from `struct sigcontext'. */
+ addr = get_frame_memory_unsigned (this_frame, base + 8, 4);
+ trad_frame_set_reg_addr (this_cache, M68K_FP_REGNUM, addr + 8);
+ trad_frame_set_reg_addr (this_cache, M68K_SP_REGNUM, addr + 12);
+ trad_frame_set_reg_addr (this_cache, M68K_PC_REGNUM, addr + 20);
+ trad_frame_set_reg_addr (this_cache, M68K_PS_REGNUM, addr + 24);
+
+ /* The sc_ap member of `struct sigcontext' points to additional
+ hardware state. Here we find the missing registers. */
+ addr = get_frame_memory_unsigned (this_frame, addr + 16, 4) + 4;
+ for (regnum = M68K_D0_REGNUM; regnum < M68K_FP_REGNUM; regnum++, addr += 4)
+ trad_frame_set_reg_addr (this_cache, regnum, addr);
+
+ /* Construct the frame ID using the function start. */
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+static const struct tramp_frame m68kobsd_sigtramp = {
+ SIGTRAMP_FRAME,
+ 2,
+ {
+ { 0x206f, -1 }, { 0x000c, -1}, /* moveal %sp@(12),%a0 */
+ { 0x4e90, -1 }, /* jsr %a0@ */
+ { 0x588f, -1 }, /* addql #4,%sp */
+ { 0x4e41, -1 }, /* trap #1 */
+ { 0x2f40, -1 }, { 0x0004, -1 }, /* moveal %d0,%sp@(4) */
+ { 0x7001, -1 }, /* moveq #SYS_exit,%d0 */
+ { 0x4e40, -1 }, /* trap #0 */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ m68kobsd_sigtramp_cache_init
+};
+\f