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ARC: Handle zero-overhead-loop in unaligned access handler

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If a load or store is the last instruction in a zero-overhead-loop, and
it's misaligned, the loop would execute only once.

This fixes that problem.

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Mischa Jonker 2013-09-26 15:44:56 +02:00 • committed by Vineet Gupta
parent 4a10c2ac2f
commit c11eb222fd
1 changed files with 6 additions and 0 deletions
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6
arch/arc/kernel/unaligned.c
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@ -245,6 +245,12 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,
regs->status32 &= ~STATUS_DE_MASK; regs->status32 &= ~STATUS_DE_MASK;
} else { } else {
regs->ret += state.instr_len; regs->ret += state.instr_len;
/* handle zero-overhead-loop */
if ((regs->ret == regs->lp_end) && (regs->lp_count)) {
regs->ret = regs->lp_start;
regs->lp_count--;
}
} }
return 0; return 0;