if (env->hflags & MIPS_HFLAG_M16) {
if (env->insn_flags & ASE_MICROMIPS) {
/* microMIPS mode */
- abi_ulong instr[2];
-
- ret = get_user_u16(instr[0], env->active_tc.PC) ||
- get_user_u16(instr[1], env->active_tc.PC + 2);
+ ret = get_user_u16(trap_instr, env->active_tc.PC);
+ if (ret != 0) {
+ goto error;
+ }
- trap_instr = (instr[0] << 16) | instr[1];
+ if ((trap_instr >> 10) == 0x11) {
+ /* 16-bit instruction */
+ code = trap_instr & 0xf;
+ } else {
+ /* 32-bit instruction */
+ abi_ulong instr_lo;
+
+ ret = get_user_u16(instr_lo,
+ env->active_tc.PC + 2);
+ if (ret != 0) {
+ goto error;
+ }
+ trap_instr = (trap_instr << 16) | instr_lo;
+ code = ((trap_instr >> 6) & ((1 << 20) - 1));
+ /* Unfortunately, microMIPS also suffers from
+ the old assembler bug... */
+ if (code >= (1 << 10)) {
+ code >>= 10;
+ }
+ }
} else {
/* MIPS16e mode */
ret = get_user_u16(trap_instr, env->active_tc.PC);
goto error;
}
code = (trap_instr >> 6) & 0x3f;
- if (do_break(env, &info, code) != 0) {
- goto error;
- }
- break;
}
} else {
ret = get_user_ual(trap_instr, env->active_tc.PC);
- }
-
- if (ret != 0) {
- goto error;
- }
+ if (ret != 0) {
+ goto error;
+ }
- /* As described in the original Linux kernel code, the
- * below checks on 'code' are to work around an old
- * assembly bug.
- */
- code = ((trap_instr >> 6) & ((1 << 20) - 1));
- if (code >= (1 << 10)) {
- code >>= 10;
+ /* As described in the original Linux kernel code, the
+ * below checks on 'code' are to work around an old
+ * assembly bug.
+ */
+ code = ((trap_instr >> 6) & ((1 << 20) - 1));
+ if (code >= (1 << 10)) {
+ code >>= 10;
+ }
}
if (do_break(env, &info, code) != 0) {