For AArch32, exception return happens through certain kinds
of CPSR write. We don't currently have any CPU_LOG_INT logging
of these events (unlike AArch64, where we log in the ERET
instruction). Add some suitable logging.
This will log exception returns like this:
Exception return from AArch32 hyp to usr PC 0x80100374
paralleling the existing logging in the exception_return
helper for AArch64 exception returns:
Exception return from AArch64 EL2 to AArch64 EL0 PC 0x8003045c
Exception return from AArch64 EL2 to AArch32 EL0 PC 0x8003045c
(Note that an AArch32 exception return can only be
AArch32->AArch32, never to AArch64.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id:
20181012144235.19646-2-peter.maydell@linaro.org
mask |= CPSR_IL;
val |= CPSR_IL;
}
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Illegal AArch32 mode switch attempt from %s to %s\n",
+ aarch32_mode_name(env->uncached_cpsr),
+ aarch32_mode_name(val));
} else {
+ qemu_log_mask(CPU_LOG_INT, "%s %s to %s PC 0x%" PRIx32 "\n",
+ write_type == CPSRWriteExceptionReturn ?
+ "Exception return from AArch32" :
+ "AArch32 mode switch from",
+ aarch32_mode_name(env->uncached_cpsr),
+ aarch32_mode_name(val), env->regs[15]);
switch_mode(env, val & CPSR_M);
}
}
}
}
+/**
+ * aarch32_mode_name(): Return name of the AArch32 CPU mode
+ * @psr: Program Status Register indicating CPU mode
+ *
+ * Returns, for debug logging purposes, a printable representation
+ * of the AArch32 CPU mode ("svc", "usr", etc) as indicated by
+ * the low bits of the specified PSR.
+ */
+static inline const char *aarch32_mode_name(uint32_t psr)
+{
+ static const char cpu_mode_names[16][4] = {
+ "usr", "fiq", "irq", "svc", "???", "???", "mon", "abt",
+ "???", "???", "hyp", "und", "???", "???", "???", "sys"
+ };
+
+ return cpu_mode_names[psr & 0xf];
+}
+
#endif
translator_loop(ops, &dc.base, cpu, tb);
}
-static const char *cpu_mode_names[16] = {
- "usr", "fiq", "irq", "svc", "???", "???", "mon", "abt",
- "???", "???", "hyp", "und", "???", "???", "???", "sys"
-};
-
void arm_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
psr & CPSR_V ? 'V' : '-',
psr & CPSR_T ? 'T' : 'A',
ns_status,
- cpu_mode_names[psr & 0xf], (psr & 0x10) ? 32 : 26);
+ aarch32_mode_name(psr), (psr & 0x10) ? 32 : 26);
}
if (flags & CPU_DUMP_FPU) {