diff options
author | Peter Maydell <peter.maydell@linaro.org> | 2014-04-15 19:18:49 +0100 |
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committer | Peter Maydell <peter.maydell@linaro.org> | 2014-04-17 21:34:06 +0100 |
commit | 7633378d5fbe932c9d38ae8961ef035d1ed26bfd (patch) | |
tree | f8a8cbea6efa396e6ad53524b5813ade9aae8d8b /target-arm/cpu64.c | |
parent | c29f9a0a29e76b36fd1bb6f5adf7841c6fdbc0b3 (diff) | |
download | hqemu-7633378d5fbe932c9d38ae8961ef035d1ed26bfd.zip hqemu-7633378d5fbe932c9d38ae8961ef035d1ed26bfd.tar.gz |
target-arm: Handle the CPU being in AArch32 mode in the AArch64 set_pc
The AArch64 implementation of the set_pc method needs to be updated to
handle the possibility that the CPU is in AArch32 mode; otherwise there
are weird crashes when doing interprocessing in system emulation mode
when an interrupt occurs and we fail to resynchronize the 32-bit PC
with the TB we need to execute next.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Diffstat (limited to 'target-arm/cpu64.c')
-rw-r--r-- | target-arm/cpu64.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/target-arm/cpu64.c b/target-arm/cpu64.c index 9a0c431..c673ac2 100644 --- a/target-arm/cpu64.c +++ b/target-arm/cpu64.c @@ -172,11 +172,15 @@ static void aarch64_cpu_finalizefn(Object *obj) static void aarch64_cpu_set_pc(CPUState *cs, vaddr value) { ARMCPU *cpu = ARM_CPU(cs); - /* - * TODO: this will need updating for system emulation, - * when the core may be in AArch32 mode. + /* It's OK to look at env for the current mode here, because it's + * never possible for an AArch64 TB to chain to an AArch32 TB. + * (Otherwise we would need to use synchronize_from_tb instead.) */ - cpu->env.pc = value; + if (is_a64(&cpu->env)) { + cpu->env.pc = value; + } else { + cpu->env.regs[15] = value; + } } static void aarch64_cpu_class_init(ObjectClass *oc, void *data) |