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target-lm32: stop VM on illegal or unknown instruction

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Instead of translating the instruction to a no-op, pause the VM and display
a message to the user.

As a side effect, this also works for instructions where the operands are
only known at runtime.

Signed-off-by: Michael Walle <michael@walle.cc>
This commit is contained in:
Michael Walle 2013-09-23 20:47:33 +02:00
parent 8c5edce5b7
commit 667ff9612b
3 changed files with 86 additions and 38 deletions
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17
target-lm32/op_helper.c
View file

@ -8,6 +8,10 @@
#include "exec/softmmu_exec.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/sysemu.h"
#endif
#if !defined(CONFIG_USER_ONLY)
#define MMUSUFFIX _mmu
#define SHIFT 0
@ -39,6 +43,19 @@ void HELPER(hlt)(CPULM32State *env)
cpu_loop_exit(env);
}
void HELPER(ill)(CPULM32State *env)
{
#ifndef CONFIG_USER_ONLY
CPUState *cs = CPU(lm32_env_get_cpu(env));
fprintf(stderr, "VM paused due to illegal instruction. "
"Connect a debugger or switch to the monitor console "
"to find out more.\n");
qemu_system_vmstop_request(RUN_STATE_PAUSED);
cs->halted = 1;
raise_exception(env, EXCP_HALTED);
#endif
}
void HELPER(wcsr_bp)(CPULM32State *env, uint32_t bp, uint32_t idx)
{
uint32_t addr = bp & ~1;