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| author | Peter Maydell <peter.maydell@linaro.org> | 2015-04-01 17:57:29 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-04-01 17:57:29 +0100 |
| commit | 7847f9ea9fce15a9ecfb62ab72c1e84ff516b0db (patch) | |
| tree | 57af085d325a3b98ff097c385a4c1d5ff8e0bc56 | |
| parent | 4de9a883be653f02f8c1d5dcd1066f614d9606b6 (diff) | |
| download | qemu-7847f9ea9fce15a9ecfb62ab72c1e84ff516b0db.tar.gz | |
target-arm: Store SPSR_EL1 state in banked_spsr[1] (SPSR_svc)
The AArch64 SPSR_EL1 register is architecturally mandated to
be mapped to the AArch32 SPSR_svc register. This means its
state should live in QEMU's env->banked_spsr[1] field.
Correct the various places in the code that incorrectly
put it in banked_spsr[0].
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target-arm/helper-a64.c | 2 | ||||
| -rw-r--r-- | target-arm/helper.c | 2 | ||||
| -rw-r--r-- | target-arm/internals.h | 5 |
3 files changed, 6 insertions, 3 deletions
diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index 7e0d038563..861f6fa69c 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -523,7 +523,7 @@ void aarch64_cpu_do_interrupt(CPUState *cs) aarch64_save_sp(env, arm_current_el(env)); env->elr_el[new_el] = env->pc; } else { - env->banked_spsr[0] = cpsr_read(env); + env->banked_spsr[aarch64_banked_spsr_index(new_el)] = cpsr_read(env); if (!env->thumb) { env->cp15.esr_el[new_el] |= 1 << 25; } diff --git a/target-arm/helper.c b/target-arm/helper.c index 10886c5281..d77c6de40c 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2438,7 +2438,7 @@ static const ARMCPRegInfo v8_cp_reginfo[] = { { .name = "SPSR_EL1", .state = ARM_CP_STATE_AA64, .type = ARM_CP_ALIAS, .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 0, - .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[0]) }, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[1]) }, /* We rely on the access checks not allowing the guest to write to the * state field when SPSel indicates that it's being used as the stack * pointer. diff --git a/target-arm/internals.h b/target-arm/internals.h index bb171a73bd..2cc301762c 100644 --- a/target-arm/internals.h +++ b/target-arm/internals.h @@ -82,11 +82,14 @@ static inline void arm_log_exception(int idx) /* * For AArch64, map a given EL to an index in the banked_spsr array. + * Note that this mapping and the AArch32 mapping defined in bank_number() + * must agree such that the AArch64<->AArch32 SPSRs have the architecturally + * mandated mapping between each other. */ static inline unsigned int aarch64_banked_spsr_index(unsigned int el) { static const unsigned int map[4] = { - [1] = 0, /* EL1. */ + [1] = 1, /* EL1. */ [2] = 6, /* EL2. */ [3] = 7, /* EL3. */ }; |