+/* Signal trampolines. */
+
+static void
+mips64obsd_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *cache,
+ CORE_ADDR func)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ CORE_ADDR sp, sigcontext_addr, addr;
+ int regnum;
+
+ /* We find the appropriate instance of `struct sigcontext' at a
+ fixed offset in the signal frame. */
+ sp = get_frame_register_signed (this_frame,
+ MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch));
+ sigcontext_addr = sp + 32;
+
+ /* PC. */
+ regnum = mips_regnum (gdbarch)->pc;
+ trad_frame_set_reg_addr (cache,
+ regnum + gdbarch_num_regs (gdbarch),
+ sigcontext_addr + 16);
+
+ /* GPRs. */
+ for (regnum = MIPS_AT_REGNUM, addr = sigcontext_addr + 32;
+ regnum <= MIPS_RA_REGNUM; regnum++, addr += 8)
+ trad_frame_set_reg_addr (cache,
+ regnum + gdbarch_num_regs (gdbarch),
+ addr);
+
+ /* HI and LO. */
+ regnum = mips_regnum (gdbarch)->lo;
+ trad_frame_set_reg_addr (cache,
+ regnum + gdbarch_num_regs (gdbarch),
+ sigcontext_addr + 280);
+ regnum = mips_regnum (gdbarch)->hi;
+ trad_frame_set_reg_addr (cache,
+ regnum + gdbarch_num_regs (gdbarch),
+ sigcontext_addr + 288);
+
+ /* TODO: Handle the floating-point registers. */
+
+ trad_frame_set_id (cache, frame_id_build (sp, func));
+}
+
+static const struct tramp_frame mips64obsd_sigframe =
+{
+ SIGTRAMP_FRAME,
+ MIPS_INSN32_SIZE,
+ {
+ { 0x67a40020, -1 }, /* daddiu a0,sp,32 */
+ { 0x24020067, -1 }, /* li v0,103 */
+ { 0x0000000c, -1 }, /* syscall */
+ { 0x0000000d, -1 }, /* break */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips64obsd_sigframe_init
+};
+
+\f