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target/microblaze: Ensure imm constant is always available

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Include the env->imm value in the TB values when IMM_FLAG is set.
This means that we can always reconstruct the complete 32-bit imm.
Discard env_imm when its contents can no longer be accessed.

Fix user-mode checks for BRK/BRKI, which depend on IMM.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-17 21:52:15 -07:00
parent 11105d6749
commit d7ecb757d1
2 changed files with 67 additions and 46 deletions
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2
target/microblaze/cpu.h
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@ -374,9 +374,9 @@ static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
*flags = (env->iflags & IFLAGS_TB_MASK) |
(env->msr & (MSR_UM | MSR_VM | MSR_EE));
*cs_base = (*flags & IMM_FLAG ? env->imm : 0);
}
#if !defined(CONFIG_USER_ONLY)