diff --git a/qemu/target/arm/helper-a64.c b/qemu/target/arm/helper-a64.c index 6dd1c870..b95d1872 100644 --- a/qemu/target/arm/helper-a64.c +++ b/qemu/target/arm/helper-a64.c @@ -954,7 +954,7 @@ static int el_from_spsr(uint32_t spsr) } } -void HELPER(exception_return)(CPUARMState *env) +void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc) { int cur_el = arm_current_el(env); unsigned int spsr_idx = aarch64_banked_spsr_index(cur_el); @@ -1021,9 +1021,9 @@ void HELPER(exception_return)(CPUARMState *env) aarch64_sync_64_to_32(env); if (spsr & CPSR_T) { - env->regs[15] = env->elr_el[cur_el] & ~0x1; + env->regs[15] = new_pc & ~0x1; } else { - env->regs[15] = env->elr_el[cur_el] & ~0x3; + env->regs[15] = new_pc & ~0x3; } qemu_log_mask(CPU_LOG_INT, "Exception return from AArch64 EL%d to " "AArch32 EL%d PC 0x%" PRIx32 "\n", @@ -1035,7 +1035,7 @@ void HELPER(exception_return)(CPUARMState *env) env->pstate &= ~PSTATE_SS; } aarch64_restore_sp(env, new_el); - env->pc = env->elr_el[cur_el]; + env->pc = new_pc; qemu_log_mask(CPU_LOG_INT, "Exception return from AArch64 EL%d to " "AArch64 EL%d PC 0x%" PRIx64 "\n", cur_el, new_el, env->pc); @@ -1062,7 +1062,7 @@ illegal_return: * no change to exception level, execution state or stack pointer */ env->pstate |= PSTATE_IL; - env->pc = env->elr_el[cur_el]; + env->pc = new_pc; spsr &= PSTATE_NZCV | PSTATE_DAIF; spsr |= pstate_read(env) & ~(PSTATE_NZCV | PSTATE_DAIF); pstate_write(env, spsr); diff --git a/qemu/target/arm/helper-a64.h b/qemu/target/arm/helper-a64.h index 7f3e745c..524887ff 100644 --- a/qemu/target/arm/helper-a64.h +++ b/qemu/target/arm/helper-a64.h @@ -82,7 +82,7 @@ DEF_HELPER_2(advsimd_f16tosinth, i32, f16, ptr) DEF_HELPER_2(advsimd_f16touinth, i32, f16, ptr) DEF_HELPER_2(sqrt_f16, f16, f16, ptr) -DEF_HELPER_1(exception_return, void, env) +DEF_HELPER_2(exception_return, void, env, i64) DEF_HELPER_FLAGS_3(pacia, TCG_CALL_NO_WG, i64, env, i64, i64) DEF_HELPER_FLAGS_3(pacib, TCG_CALL_NO_WG, i64, env, i64, i64) diff --git a/qemu/target/arm/translate-a64.c b/qemu/target/arm/translate-a64.c index 7bb35b04..19da1ca1 100644 --- a/qemu/target/arm/translate-a64.c +++ b/qemu/target/arm/translate-a64.c @@ -2062,6 +2062,7 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) { TCGContext *tcg_ctx = s->uc->tcg_ctx; unsigned int opc, op2, op3, rn, op4; + TCGv_i64 dst; opc = extract32(insn, 21, 4); op2 = extract32(insn, 16, 5); @@ -2089,7 +2090,11 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) unallocated_encoding(s); return; } - gen_helper_exception_return(tcg_ctx, tcg_ctx->cpu_env); + dst = tcg_temp_new_i64(tcg_ctx); + tcg_gen_ld_i64(tcg_ctx, dst, tcg_ctx->cpu_env, + offsetof(CPUARMState, elr_el[s->current_el])); + gen_helper_exception_return(tcg_ctx, tcg_ctx->cpu_env, dst); + tcg_temp_free_i64(tcg_ctx, dst); /* Must exit loop to check un-masked IRQs */ s->base.is_jmp = DISAS_EXIT; return;