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tcg/i386: Fix %r12 guest_base initialization 

When %gs cannot be used, we use register offset addressing.
This path is almost never used, so it was clearly not tested.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200406174803.8192-1-richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Richard Henderson 2020-04-06 10:48:03 -07:00 committed by Alex Bennée
parent eca7a8e6c0
commit cce743abbf
1 changed files with 1 additions and 1 deletions
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2
tcg/i386/tcg-target.inc.c
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@ -3737,7 +3737,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
} else {
/* Choose R12 because, as a base, it requires a SIB byte. */
x86_guest_base_index = TCG_REG_R12;
tcg_out_mov(s, TCG_TYPE_PTR, x86_guest_base_index, guest_base);
tcg_out_movi(s, TCG_TYPE_PTR, x86_guest_base_index, guest_base);
tcg_regset_set_reg(s->reserved_regs, x86_guest_base_index);
}
}