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linux-user/openrisc: Abort for EXCP_RANGE, EXCP_FPE

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QEMU does not allow the system control bits for either exception to
be enabled in linux-user, therefore both exceptions are dead code.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-09-14 20:27:58 -07:00
parent fac94cb36d
commit d315712b69
1 changed files with 9 additions and 8 deletions
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17
linux-user/openrisc/cpu_loop.c
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@ -56,7 +56,6 @@ void cpu_loop(CPUOpenRISCState *env)
break;
case EXCP_DPF:
case EXCP_IPF:
case EXCP_RANGE:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
@ -77,13 +76,6 @@ void cpu_loop(CPUOpenRISCState *env)
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_FPE:
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
info.si_code = 0;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_INTERRUPT:
/* We processed the pending cpu work above. */
break;
@ -96,6 +88,15 @@ void cpu_loop(CPUOpenRISCState *env)
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case EXCP_RANGE:
/* Requires SR.OVE set, which linux-user won't do. */
cpu_abort(cs, "Unexpected RANGE exception");
case EXCP_FPE:
/*
* Requires FPSCR.FPEE set. Writes to FPSCR from usermode not
* yet enabled in kernel ABI, so linux-user does not either.
*/
cpu_abort(cs, "Unexpected FPE exception");
default:
g_assert_not_reached();
}