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target-arm: Handle the CPU being in AArch32 mode in the AArch64 set_pc

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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>
This commit is contained in:
Peter Maydell 2014-04-15 19:18:49 +01:00
parent c29f9a0a29
commit 7633378d5f
1 changed files with 8 additions and 4 deletions
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12
target-arm/cpu64.c
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@ -172,11 +172,15 @@ static void aarch64_cpu_finalizefn(Object *obj)
static void aarch64_cpu_set_pc(CPUState *cs, vaddr value) static void aarch64_cpu_set_pc(CPUState *cs, vaddr value)
{ {
ARMCPU *cpu = ARM_CPU(cs); ARMCPU *cpu = ARM_CPU(cs);
/* /* It's OK to look at env for the current mode here, because it's
* TODO: this will need updating for system emulation, * never possible for an AArch64 TB to chain to an AArch32 TB.
* when the core may be in AArch32 mode. * (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) static void aarch64_cpu_class_init(ObjectClass *oc, void *data)