Re: [PATCH for-6.2 04/43] target/hppa: Implement do_unaligned_access for user-only

[Peter Maydell]

On Thu, 29 Jul 2021 at 01:57, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  linux-user/hppa/cpu_loop.c | 2 +-
>  target/hppa/cpu.c          | 8 +++++---
>  2 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/linux-user/hppa/cpu_loop.c b/linux-user/hppa/cpu_loop.c
> index 82d8183821..5ce30fec8b 100644
> --- a/linux-user/hppa/cpu_loop.c
> +++ b/linux-user/hppa/cpu_loop.c
> @@ -161,7 +161,7 @@ void cpu_loop(CPUHPPAState *env)
>          case EXCP_UNALIGN:
>              info.si_signo = TARGET_SIGBUS;
>              info.si_errno = 0;
> -            info.si_code = 0;
> +            info.si_code = TARGET_BUS_ADRALN;
>              info._sifields._sigfault._addr = env->cr[CR_IOR];
>              queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
>              break;
> diff --git a/target/hppa/cpu.c b/target/hppa/cpu.c
> index 2eace4ee12..55c0d81046 100644
> --- a/target/hppa/cpu.c
> +++ b/target/hppa/cpu.c
> @@ -71,7 +71,6 @@ static void hppa_cpu_disas_set_info(CPUState *cs, 
> disassemble_info *info)
>      info->print_insn = print_insn_hppa;
>  }
>
> -#ifndef CONFIG_USER_ONLY
>  static void hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
>                                           MMUAccessType access_type,
>                                           int mmu_idx, uintptr_t retaddr)
> @@ -80,15 +79,18 @@ static void hppa_cpu_do_unaligned_access(CPUState *cs, 
> vaddr addr,
>      CPUHPPAState *env = &cpu->env;
>
>      cs->exception_index = EXCP_UNALIGN;
> +#ifdef CONFIG_USER_ONLY
> +    env->cr[CR_IOR] = addr;

Do we not need the top 32 bits of the address, which the softmmu
version is recording in CR_ISR ?

> +#else
>      if (env->psw & PSW_Q) {
>          /* ??? Needs tweaking for hppa64.  */
>          env->cr[CR_IOR] = addr;
>          env->cr[CR_ISR] = addr >> 32;
>      }
> +#endif
>
>      cpu_loop_exit_restore(cs, retaddr);
>  }
> -#endif /* CONFIG_USER_ONLY */

-- PMM