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target-sparc: fix Trap Based Address Register behavior for sparc64

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Accoding the chapter 7.6 Trap Processing of the SPARC Architecture Manual v9,
the Trap Based Address Register is not modified as a trap is taken.

This fix allows booting FreeBSD-10.3-RELEASE-sparc64.

Backports commit de5f1077446ca455342db149737bdc395a7b9882 from qemu
This commit is contained in:
Artyom Tarasenko 2018-02-23 13:39:57 -05:00 committed by Lioncash
parent 34472bd6fd
commit af0e282ab1
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 2 additions and 3 deletions
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5
qemu/target-sparc/int64_helper.c
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@ -80,9 +80,8 @@ void sparc_cpu_do_interrupt(CPUState *cs)
} else if ((intno & 0x1c0) == TT_FILL) {
cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1));
}
env->tbr &= ~0x7fffULL;
env->tbr |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
env->pc = env->tbr;
env->pc = env->tbr & ~0x7fffULL;
env->pc |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
env->npc = env->pc + 4;
cs->exception_index = -1;
}