x86, extable: Add early_fixup_exception()
Add a restricted version of fixup_exception() to be used during early boot only. In particular, this doesn't support the try..catch variant since we may not have a thread_info set up yet. This relies on the exception table being sorted already at build time. Link: http://lkml.kernel.org/r/1334794610-5546-1-git-send-email-hpa@zytor.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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@ -35,3 +35,20 @@ int fixup_exception(struct pt_regs *regs)
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return 0;
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return 0;
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}
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}
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/* Restricted version used during very early boot */
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int __init early_fixup_exception(unsigned long *ip)
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{
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const struct exception_table_entry *fixup;
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fixup = search_exception_tables(*ip);
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if (fixup) {
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if (fixup->fixup < 16)
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return 0; /* Not supported during early boot */
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*ip = fixup->fixup;
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return 1;
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}
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return 0;
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}
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