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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.

Backports commit c82460a560176ef69c2f0662bd280612e274db96 from qemu
This commit is contained in:
Sergey Fedorov 2018-02-23 20:42:21 -05:00 committed by Lioncash
parent 7538001da9
commit 87c3382dc8
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 1 additions and 2 deletions
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3
qemu/tcg/mips/tcg-target.inc.c
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@ -1886,7 +1886,6 @@ 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);
}