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| author | Alex Bennée <alex.bennee@linaro.org> | 2019-12-17 15:08:57 +0000 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2020-01-09 11:41:29 +0000 |
| commit | 4ff5ef9e911c670ca10cdd36dd27c5395ec2c753 (patch) | |
| tree | 5abc54db219c91ed383e48bbfaad767b8628b1e9 /target/arm/m_helper.c | |
| parent | b906acbb3aceed5b1eca30d9d365d5bd7431400b (diff) | |
target/arm: only update pc after semihosting completes
Before we introduce blocking semihosting calls we need to ensure we
can restart the system on semi hosting exception. To be able to do
this the EXCP_SEMIHOST operation should be idempotent until it finally
completes. Practically this means ensureing we only update the pc
after the semihosting call has completed.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Keith Packard <keithp@keithp.com>
Tested-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'target/arm/m_helper.c')
| -rw-r--r-- | target/arm/m_helper.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c index 76de317e6a..33d414a684 100644 --- a/target/arm/m_helper.c +++ b/target/arm/m_helper.c @@ -2185,6 +2185,7 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs) "...handling as semihosting call 0x%x\n", env->regs[0]); env->regs[0] = do_arm_semihosting(env); + env->regs[15] += env->thumb ? 2 : 4; return; case EXCP_BKPT: armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG, false); |