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target/i386: Use cpu_unwind_state_data for tpr access

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Avoid cpu_restore_state, and modifying env->eip out from
underneath the translator with TARGET_TB_PCREL.  There is
some slight duplication from x86_restore_state_to_opc,
but it's just a few lines.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1269
Reviewed-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-10-24 22:45:29 +10:00
parent 6392bd6b90
commit f484f213c9
1 changed files with 23 additions and 2 deletions
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25
target/i386/helper.c
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@ -509,6 +509,27 @@ void cpu_x86_inject_mce(Monitor *mon, X86CPU *cpu, int bank,
}
}
static inline target_ulong get_memio_eip(CPUX86State *env)
{
#ifdef CONFIG_TCG
uint64_t data[TARGET_INSN_START_WORDS];
CPUState *cs = env_cpu(env);
if (!cpu_unwind_state_data(cs, cs->mem_io_pc, data)) {
return env->eip;
}
/* Per x86_restore_state_to_opc. */
if (TARGET_TB_PCREL) {
return (env->eip & TARGET_PAGE_MASK) | data[0];
} else {
return data[0] - env->segs[R_CS].base;
}
#else
qemu_build_not_reached();
#endif
}
void cpu_report_tpr_access(CPUX86State *env, TPRAccess access)
{
X86CPU *cpu = env_archcpu(env);
@ -519,9 +540,9 @@ void cpu_report_tpr_access(CPUX86State *env, TPRAccess access)
cpu_interrupt(cs, CPU_INTERRUPT_TPR);
} else if (tcg_enabled()) {
cpu_restore_state(cs, cs->mem_io_pc, false);
target_ulong eip = get_memio_eip(env);
apic_handle_tpr_access_report(cpu->apic_state, env->eip, access);
apic_handle_tpr_access_report(cpu->apic_state, eip, access);
}
}
#endif /* !CONFIG_USER_ONLY */