Commit cce743ab authored by Richard Henderson's avatar Richard Henderson Committed by Alex Bennée
Browse files

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: default avatarRichard Henderson <richard.henderson@linaro.org>
Reviewed-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Tested-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Message-Id: <20200406174803.8192-1-richard.henderson@linaro.org>
Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
parent eca7a8e6

tcg/i386/tcg-target.inc.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

        }

    }