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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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4
hw/arm/boot.c
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@ -697,10 +697,6 @@ static void do_cpu_reset(void *opaque)
g_assert_not_reached();
}
if (!env->aarch64) {
env->thumb = info->entry & 1;
entry &= 0xfffffffe;
}
cpu_set_pc(cs, entry);
} else {
/* If we are booting Linux then we need to check whether we are