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arm: Clarify the logic of set_pc()

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Until now, the set_pc logic was unclear, which raised questions about
whether it should be used directly, applying a value to PC or adding
additional checks, for example, set the Thumb bit in Arm cpu. Let's set
the set_pc logic for “Configure the PC, as was done in the ELF file”
and implement synchronize_with_tb hook for preserving PC to cpu_tb_exec.

Signed-off-by: Julia Suvorova <jusual@mail.ru>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190129121817.7109-1-jusual@mail.ru
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Julia Suvorova 2019-02-01 14:55:46 +00:00 • committed by Peter Maydell
parent ef682cdb4a
commit 42f6ed9193
5 changed files with 39 additions and 25 deletions
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3
target/arm/arm-powerctl.c
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@ -120,11 +120,8 @@ static void arm_set_cpu_on_async_work(CPUState *target_cpu_state,
if (info->target_aa64) {
target_cpu->env.xregs[0] = info->context_id;
target_cpu->env.thumb = false;
} else {
target_cpu->env.regs[0] = info->context_id;
target_cpu->env.thumb = info->entry & 1;
info->entry &= 0xfffffffe;
}
/* Start the new CPU at the requested address */