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tcg/mips: Make direct jump patching thread-safe

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Ensure direct jump patching in MIPS is atomic by using
atomic_read()/atomic_set() for code patching.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Message-Id: <1461341333-19646-11-git-send-email-sergey.fedorov@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
[rth: Merged the deposit32 followup.]
[rth: Merged the following followup.]
Message-Id: <1462210518-26522-1-git-send-email-sergey.fedorov@linaro.org>
This commit is contained in:
Sergey Fedorov 2016-04-22 19:08:52 +03:00 committed by Richard Henderson
parent 84f79fb7c6
commit c82460a560
1 changed files with 1 additions and 2 deletions
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3
tcg/mips/tcg-target.inc.c
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@ -1885,7 +1885,6 @@ static void tcg_target_init(TCGContext *s)
void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr)
{
uint32_t *ptr = (uint32_t *)jmp_addr;
*ptr = deposit32(*ptr, 0, 26, addr >> 2);
atomic_set((uint32_t *)jmp_addr, deposit32(OPC_J, 0, 26, addr >> 2));
flush_icache_range(jmp_addr, jmp_addr + 4);
}