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target-alpha: Set PC correctly for floating-point exceptions

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PC should be one past the faulting insn.  Add better commentary
for the machine-check exception path.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-06-28 13:06:19 -07:00
parent 9d5a626b2c
commit ba9c5de5f2
2 changed files with 10 additions and 1 deletions
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2
target-alpha/helper.c
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@ -571,6 +571,8 @@ void QEMU_NORETURN dynamic_excp(CPUAlphaState *env, uintptr_t retaddr,
env->error_code = error;
if (retaddr) {
cpu_restore_state(cs, retaddr);
/* Floating-point exceptions (our only users) point to the next PC. */
env->pc += 4;
}
cpu_loop_exit(cs);
}