Re: [PATCH v4 02/12] {linux,bsd}-user: Introduce get_task_state()

[Warner Losh <imp@bsdimp.com>]

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On Mon, Feb 19, 2024 at 7:21 AM Ilya Leoshkevich <iii@linux.ibm.com> wrote:

> A CPU's TaskState is stored in the CPUState's void *opaque field,
> accessing which is somewhat awkward due to having to use a cast.
> Introduce a wrapper and use it everywhere.
>
> Suggested-by: Alex Bennée <alex.bennee@linaro.org>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
>

Reviewed-by: Warner Losh <imp@bsdimp.com>

The bsd-user stuff is definitely good. The linux-user seems good, but I
didn't look
at it as closely.

Warner

>  bsd-user/bsd-file.h           |  2 +-
>  bsd-user/qemu.h               |  5 +++++
>  bsd-user/signal.c             | 20 ++++++++++----------
>  gdbstub/user-target.c         |  4 ++--
>  include/user/safe-syscall.h   |  2 +-
>  linux-user/aarch64/cpu_loop.c |  2 +-
>  linux-user/arm/cpu_loop.c     |  4 ++--
>  linux-user/arm/signal.c       |  2 +-
>  linux-user/cris/cpu_loop.c    |  2 +-
>  linux-user/elfload.c          |  6 +++---
>  linux-user/hppa/signal.c      |  2 +-
>  linux-user/linuxload.c        |  2 +-
>  linux-user/m68k/cpu_loop.c    |  2 +-
>  linux-user/m68k/target_cpu.h  |  2 +-
>  linux-user/mips/cpu_loop.c    |  2 +-
>  linux-user/ppc/signal.c       |  4 ++--
>  linux-user/qemu.h             |  5 +++++
>  linux-user/riscv/cpu_loop.c   |  2 +-
>  linux-user/signal-common.h    |  2 +-
>  linux-user/signal.c           | 30 +++++++++++++++---------------
>  linux-user/syscall.c          | 26 +++++++++++++-------------
>  linux-user/vm86.c             | 18 +++++++++---------
>  linux-user/xtensa/signal.c    |  2 +-
>  plugins/api.c                 |  8 ++++----
>  semihosting/arm-compat-semi.c |  8 ++++----
>  25 files changed, 87 insertions(+), 77 deletions(-)
>
> diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
> index 3c00dc00567..6fa2c30b4de 100644
> --- a/bsd-user/bsd-file.h
> +++ b/bsd-user/bsd-file.h
> @@ -641,7 +641,7 @@ static abi_long do_bsd_readlink(CPUArchState *env,
> abi_long arg1,
>      }
>      if (strcmp(p1, "/proc/curproc/file") == 0) {
>          CPUState *cpu = env_cpu(env);
> -        TaskState *ts = (TaskState *)cpu->opaque;
> +        TaskState *ts = get_task_state(cpu);
>          strncpy(p2, ts->bprm->fullpath, arg3);
>          ret = MIN((abi_long)strlen(ts->bprm->fullpath), arg3);
>      } else {
> diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
> index dc842fffa7d..a2417b25156 100644
> --- a/bsd-user/qemu.h
> +++ b/bsd-user/qemu.h
> @@ -110,6 +110,11 @@ typedef struct TaskState {
>      struct target_sigaltstack sigaltstack_used;
>  } __attribute__((aligned(16))) TaskState;
>
> +static inline TaskState *get_task_state(CPUState *cs)
> +{
> +    return cs->opaque;
> +}
> +
>  void stop_all_tasks(void);
>  extern const char *interp_prefix;
>  extern const char *qemu_uname_release;
> diff --git a/bsd-user/signal.c b/bsd-user/signal.c
> index f4352e4530f..e9f80a06d32 100644
> --- a/bsd-user/signal.c
> +++ b/bsd-user/signal.c
> @@ -319,7 +319,7 @@ void host_to_target_siginfo(target_siginfo_t *tinfo,
> const siginfo_t *info)
>
>  int block_signals(void)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      sigset_t set;
>
>      /*
> @@ -359,7 +359,7 @@ void dump_core_and_abort(int target_sig)
>  {
>      CPUState *cpu = thread_cpu;
>      CPUArchState *env = cpu_env(cpu);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      int core_dumped = 0;
>      int host_sig;
>      struct sigaction act;
> @@ -421,7 +421,7 @@ void queue_signal(CPUArchState *env, int sig, int
> si_type,
>                    target_siginfo_t *info)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>
>      trace_user_queue_signal(env, sig);
>
> @@ -476,7 +476,7 @@ void force_sig_fault(int sig, int code, abi_ulong addr)
>  static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
>  {
>      CPUState *cpu = thread_cpu;
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      target_siginfo_t tinfo;
>      ucontext_t *uc = puc;
>      struct emulated_sigtable *k;
> @@ -585,7 +585,7 @@ static void host_signal_handler(int host_sig,
> siginfo_t *info, void *puc)
>  /* compare to kern/kern_sig.c sys_sigaltstack() and kern_sigaltstack() */
>  abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr,
> abi_ulong sp)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      int ret;
>      target_stack_t oss;
>
> @@ -714,7 +714,7 @@ int do_sigaction(int sig, const struct
> target_sigaction *act,
>  static inline abi_ulong get_sigframe(struct target_sigaction *ka,
>          CPUArchState *env, size_t frame_size)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      abi_ulong sp;
>
>      /* Use default user stack */
> @@ -789,7 +789,7 @@ static int reset_signal_mask(target_ucontext_t
> *ucontext)
>      int i;
>      sigset_t blocked;
>      target_sigset_t target_set;
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      for (i = 0; i < TARGET_NSIG_WORDS; i++) {
>          __get_user(target_set.__bits[i], &ucontext->uc_sigmask.__bits[i]);
> @@ -839,7 +839,7 @@ badframe:
>
>  void signal_init(void)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      struct sigaction act;
>      struct sigaction oact;
>      int i;
> @@ -878,7 +878,7 @@ static void handle_pending_signal(CPUArchState *env,
> int sig,
>                                    struct emulated_sigtable *k)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct target_sigaction *sa;
>      int code;
>      sigset_t set;
> @@ -967,7 +967,7 @@ void process_pending_signals(CPUArchState *env)
>      int sig;
>      sigset_t *blocked_set, set;
>      struct emulated_sigtable *k;
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>
>      while (qatomic_read(&ts->signal_pending)) {
>          sigfillset(&set);
> diff --git a/gdbstub/user-target.c b/gdbstub/user-target.c
> index b7d4c37cd81..6646684a4c6 100644
> --- a/gdbstub/user-target.c
> +++ b/gdbstub/user-target.c
> @@ -204,7 +204,7 @@ int gdb_target_signal_to_gdb(int sig)
>
>  int gdb_get_cpu_index(CPUState *cpu)
>  {
> -    TaskState *ts = (TaskState *) cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      return ts ? ts->ts_tid : -1;
>  }
>
> @@ -399,7 +399,7 @@ void gdb_handle_query_xfer_exec_file(GArray *params,
> void *user_ctx)
>          return;
>      }
>
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      if (!ts || !ts->bprm || !ts->bprm->filename) {
>          gdb_put_packet("E00");
>          return;
> diff --git a/include/user/safe-syscall.h b/include/user/safe-syscall.h
> index 27b71cdbd8e..aa075f4d5cd 100644
> --- a/include/user/safe-syscall.h
> +++ b/include/user/safe-syscall.h
> @@ -134,7 +134,7 @@ extern char safe_syscall_start[];
>  extern char safe_syscall_end[];
>
>  #define safe_syscall(...)
>  \
> -    safe_syscall_base(&((TaskState *)thread_cpu->opaque)->signal_pending,
> \
> +    safe_syscall_base(&get_task_state(thread_cpu)->signal_pending,
> \
>                        __VA_ARGS__)
>
>  #endif
> diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c
> index 8c20dc8a39a..71cdc8be50c 100644
> --- a/linux-user/aarch64/cpu_loop.c
> +++ b/linux-user/aarch64/cpu_loop.c
> @@ -189,7 +189,7 @@ void target_cpu_copy_regs(CPUArchState *env, struct
> target_pt_regs *regs)
>  {
>      ARMCPU *cpu = env_archcpu(env);
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>      struct image_info *info = ts->info;
>      int i;
>
> diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c
> index b404117ff30..db1a41e27f4 100644
> --- a/linux-user/arm/cpu_loop.c
> +++ b/linux-user/arm/cpu_loop.c
> @@ -263,7 +263,7 @@ static bool insn_is_linux_bkpt(uint32_t opcode, bool
> is_thumb)
>
>  static bool emulate_arm_fpa11(CPUARMState *env, uint32_t opcode)
>  {
> -    TaskState *ts = env_cpu(env)->opaque;
> +    TaskState *ts = get_task_state(env_cpu(env));
>      int rc = EmulateAll(opcode, &ts->fpa, env);
>      int raise, enabled;
>
> @@ -514,7 +514,7 @@ void cpu_loop(CPUARMState *env)
>  void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct image_info *info = ts->info;
>      int i;
>
> diff --git a/linux-user/arm/signal.c b/linux-user/arm/signal.c
> index f77f692c63f..59806335f5b 100644
> --- a/linux-user/arm/signal.c
> +++ b/linux-user/arm/signal.c
> @@ -177,7 +177,7 @@ setup_return(CPUARMState *env, struct target_sigaction
> *ka, int usig,
>      abi_ulong handler = 0;
>      abi_ulong handler_fdpic_GOT = 0;
>      abi_ulong retcode;
> -    bool is_fdpic = info_is_fdpic(((TaskState
> *)thread_cpu->opaque)->info);
> +    bool is_fdpic = info_is_fdpic(get_task_state(thread_cpu)->info);
>      bool is_rt = ka->sa_flags & TARGET_SA_SIGINFO;
>      bool thumb;
>
> diff --git a/linux-user/cris/cpu_loop.c b/linux-user/cris/cpu_loop.c
> index 01e6ff16fc9..04c9086b6dc 100644
> --- a/linux-user/cris/cpu_loop.c
> +++ b/linux-user/cris/cpu_loop.c
> @@ -72,7 +72,7 @@ void cpu_loop(CPUCRISState *env)
>  void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct image_info *info = ts->info;
>
>      env->regs[0] = regs->r0;
> diff --git a/linux-user/elfload.c b/linux-user/elfload.c
> index b8eef893d0c..6de72da585d 100644
> --- a/linux-user/elfload.c
> +++ b/linux-user/elfload.c
> @@ -4499,7 +4499,7 @@ static int write_note(struct memelfnote *men, int fd)
>  static void fill_thread_info(struct elf_note_info *info, const
> CPUArchState *env)
>  {
>      CPUState *cpu = env_cpu((CPUArchState *)env);
> -    TaskState *ts = (TaskState *)cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct elf_thread_status *ets;
>
>      ets = g_malloc0(sizeof (*ets));
> @@ -4529,7 +4529,7 @@ static int fill_note_info(struct elf_note_info *info,
>  {
>  #define NUMNOTES 3
>      CPUState *cpu = env_cpu((CPUArchState *)env);
> -    TaskState *ts = (TaskState *)cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      int i;
>
>      info->notes = g_new0(struct memelfnote, NUMNOTES);
> @@ -4653,7 +4653,7 @@ static int write_note_info(struct elf_note_info
> *info, int fd)
>  static int elf_core_dump(int signr, const CPUArchState *env)
>  {
>      const CPUState *cpu = env_cpu((CPUArchState *)env);
> -    const TaskState *ts = (const TaskState *)cpu->opaque;
> +    const TaskState *ts = (const TaskState *)get_task_state((CPUState
> *)cpu);
>      struct vm_area_struct *vma = NULL;
>      g_autofree char *corefile = NULL;
>      struct elf_note_info info;
> diff --git a/linux-user/hppa/signal.c b/linux-user/hppa/signal.c
> index d08a97dae61..c84557e906a 100644
> --- a/linux-user/hppa/signal.c
> +++ b/linux-user/hppa/signal.c
> @@ -112,7 +112,7 @@ void setup_rt_frame(int sig, struct target_sigaction
> *ka,
>      abi_ulong frame_addr, sp, haddr;
>      struct target_rt_sigframe *frame;
>      int i;
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      sp = get_sp_from_cpustate(env);
>      if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
> diff --git a/linux-user/linuxload.c b/linux-user/linuxload.c
> index 4a794f8cea1..37f132be4af 100644
> --- a/linux-user/linuxload.c
> +++ b/linux-user/linuxload.c
> @@ -89,7 +89,7 @@ static int prepare_binprm(struct linux_binprm *bprm)
>  abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
>                                abi_ulong stringp, int push_ptr)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      int n = sizeof(abi_ulong);
>      abi_ulong envp;
>      abi_ulong argv;
> diff --git a/linux-user/m68k/cpu_loop.c b/linux-user/m68k/cpu_loop.c
> index caead1cb741..f79b8e4ab05 100644
> --- a/linux-user/m68k/cpu_loop.c
> +++ b/linux-user/m68k/cpu_loop.c
> @@ -95,7 +95,7 @@ void cpu_loop(CPUM68KState *env)
>  void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct image_info *info = ts->info;
>
>      env->pc = regs->pc;
> diff --git a/linux-user/m68k/target_cpu.h b/linux-user/m68k/target_cpu.h
> index c3f288dfe83..4b40c09a8d6 100644
> --- a/linux-user/m68k/target_cpu.h
> +++ b/linux-user/m68k/target_cpu.h
> @@ -37,7 +37,7 @@ static inline void cpu_clone_regs_parent(CPUM68KState
> *env, unsigned flags)
>  static inline void cpu_set_tls(CPUM68KState *env, target_ulong newtls)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>
>      ts->tp_value = newtls;
>  }
> diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
> index 990b03e727b..462387a0737 100644
> --- a/linux-user/mips/cpu_loop.c
> +++ b/linux-user/mips/cpu_loop.c
> @@ -214,7 +214,7 @@ done_syscall:
>  void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct image_info *info = ts->info;
>      int i;
>
> diff --git a/linux-user/ppc/signal.c b/linux-user/ppc/signal.c
> index 7e7302823b0..c232424c1e8 100644
> --- a/linux-user/ppc/signal.c
> +++ b/linux-user/ppc/signal.c
> @@ -486,7 +486,7 @@ void setup_rt_frame(int sig, struct target_sigaction
> *ka,
>      int i, err = 0;
>  #if defined(TARGET_PPC64)
>      struct target_sigcontext *sc = 0;
> -    struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
> +    struct image_info *image = get_task_state(thread_cpu)->info;
>  #endif
>
>      rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
> @@ -673,7 +673,7 @@ abi_long do_swapcontext(CPUArchState *env, abi_ulong
> uold_ctx,
>      }
>
>      if (uold_ctx) {
> -        TaskState *ts = (TaskState *)thread_cpu->opaque;
> +        TaskState *ts = get_task_state(thread_cpu);
>
>          if (!lock_user_struct(VERIFY_WRITE, uctx, uold_ctx, 1)) {
>              return -TARGET_EFAULT;
> diff --git a/linux-user/qemu.h b/linux-user/qemu.h
> index 4de9ec783f6..32cd43d9eff 100644
> --- a/linux-user/qemu.h
> +++ b/linux-user/qemu.h
> @@ -162,6 +162,11 @@ typedef struct TaskState {
>      uint64_t start_boottime;
>  } TaskState;
>
> +static inline TaskState *get_task_state(CPUState *cs)
> +{
> +    return cs->opaque;
> +}
> +
>  abi_long do_brk(abi_ulong new_brk);
>  int do_guest_openat(CPUArchState *cpu_env, int dirfd, const char
> *pathname,
>                      int flags, mode_t mode, bool safe);
> diff --git a/linux-user/riscv/cpu_loop.c b/linux-user/riscv/cpu_loop.c
> index bffca7db127..52c49c2e426 100644
> --- a/linux-user/riscv/cpu_loop.c
> +++ b/linux-user/riscv/cpu_loop.c
> @@ -97,7 +97,7 @@ void cpu_loop(CPURISCVState *env)
>  void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      struct image_info *info = ts->info;
>
>      env->pc = regs->sepc;
> diff --git a/linux-user/signal-common.h b/linux-user/signal-common.h
> index 3e2dc604c2f..a7df12fc445 100644
> --- a/linux-user/signal-common.h
> +++ b/linux-user/signal-common.h
> @@ -113,7 +113,7 @@ int process_sigsuspend_mask(sigset_t **pset,
> target_ulong sigset,
>  static inline void finish_sigsuspend_mask(int ret)
>  {
>      if (ret != -QEMU_ERESTARTSYS) {
> -        TaskState *ts = (TaskState *)thread_cpu->opaque;
> +        TaskState *ts = get_task_state(thread_cpu);
>          ts->in_sigsuspend = 1;
>      }
>  }
> diff --git a/linux-user/signal.c b/linux-user/signal.c
> index d3e62ab030f..cc7dd78e41f 100644
> --- a/linux-user/signal.c
> +++ b/linux-user/signal.c
> @@ -172,7 +172,7 @@ void target_to_host_old_sigset(sigset_t *sigset,
>
>  int block_signals(void)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      sigset_t set;
>
>      /* It's OK to block everything including SIGSEGV, because we won't
> @@ -194,7 +194,7 @@ int block_signals(void)
>   */
>  int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      if (oldset) {
>          *oldset = ts->signal_mask;
> @@ -237,7 +237,7 @@ int do_sigprocmask(int how, const sigset_t *set,
> sigset_t *oldset)
>   */
>  void set_sigmask(const sigset_t *set)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      ts->signal_mask = *set;
>  }
> @@ -246,7 +246,7 @@ void set_sigmask(const sigset_t *set)
>
>  int on_sig_stack(unsigned long sp)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      return (sp - ts->sigaltstack_used.ss_sp
>              < ts->sigaltstack_used.ss_size);
> @@ -254,7 +254,7 @@ int on_sig_stack(unsigned long sp)
>
>  int sas_ss_flags(unsigned long sp)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      return (ts->sigaltstack_used.ss_size == 0 ? SS_DISABLE
>              : on_sig_stack(sp) ? SS_ONSTACK : 0);
> @@ -265,7 +265,7 @@ abi_ulong target_sigsp(abi_ulong sp, struct
> target_sigaction *ka)
>      /*
>       * This is the X/Open sanctioned signal stack switching.
>       */
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
>          return ts->sigaltstack_used.ss_sp + ts->sigaltstack_used.ss_size;
> @@ -275,7 +275,7 @@ abi_ulong target_sigsp(abi_ulong sp, struct
> target_sigaction *ka)
>
>  void target_save_altstack(target_stack_t *uss, CPUArchState *env)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>
>      __put_user(ts->sigaltstack_used.ss_sp, &uss->ss_sp);
>      __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &uss->ss_flags);
> @@ -284,7 +284,7 @@ void target_save_altstack(target_stack_t *uss,
> CPUArchState *env)
>
>  abi_long target_restore_altstack(target_stack_t *uss, CPUArchState *env)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      size_t minstacksize = TARGET_MINSIGSTKSZ;
>      target_stack_t ss;
>
> @@ -571,7 +571,7 @@ static void signal_table_init(void)
>
>  void signal_init(void)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      struct sigaction act, oact;
>
>      /* initialize signal conversion tables */
> @@ -730,7 +730,7 @@ static G_NORETURN
>  void dump_core_and_abort(CPUArchState *env, int target_sig)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = (TaskState *)cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      int host_sig, core_dumped = 0;
>
>      /* On exit, undo the remapping of SIGABRT. */
> @@ -769,7 +769,7 @@ void queue_signal(CPUArchState *env, int sig, int
> si_type,
>                    target_siginfo_t *info)
>  {
>      CPUState *cpu = env_cpu(env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>
>      trace_user_queue_signal(env, sig);
>
> @@ -954,7 +954,7 @@ static void host_signal_handler(int host_sig,
> siginfo_t *info, void *puc)
>  {
>      CPUState *cpu = thread_cpu;
>      CPUArchState *env = cpu_env(cpu);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      target_siginfo_t tinfo;
>      host_sigcontext *uc = puc;
>      struct emulated_sigtable *k;
> @@ -1174,7 +1174,7 @@ static void handle_pending_signal(CPUArchState
> *cpu_env, int sig,
>      sigset_t set;
>      target_sigset_t target_old_set;
>      struct target_sigaction *sa;
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>
>      trace_user_handle_signal(cpu_env, sig);
>      /* dequeue signal */
> @@ -1256,7 +1256,7 @@ void process_pending_signals(CPUArchState *cpu_env)
>  {
>      CPUState *cpu = env_cpu(cpu_env);
>      int sig;
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      sigset_t set;
>      sigset_t *blocked_set;
>
> @@ -1316,7 +1316,7 @@ void process_pending_signals(CPUArchState *cpu_env)
>  int process_sigsuspend_mask(sigset_t **pset, target_ulong sigset,
>                              target_ulong sigsize)
>  {
> -    TaskState *ts = (TaskState *)thread_cpu->opaque;
> +    TaskState *ts = get_task_state(thread_cpu);
>      sigset_t *host_set = &ts->sigsuspend_mask;
>      target_sigset_t *target_sigset;
>
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index e384e142489..3e105488ee2 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -6515,7 +6515,7 @@ static void *clone_func(void *arg)
>      env = info->env;
>      cpu = env_cpu(env);
>      thread_cpu = cpu;
> -    ts = (TaskState *)cpu->opaque;
> +    ts = get_task_state(cpu);
>      info->tid = sys_gettid();
>      task_settid(ts);
>      if (info->child_tidptr)
> @@ -6557,7 +6557,7 @@ static int do_fork(CPUArchState *env, unsigned int
> flags, abi_ulong newsp,
>          flags &= ~(CLONE_VFORK | CLONE_VM);
>
>      if (flags & CLONE_VM) {
> -        TaskState *parent_ts = (TaskState *)cpu->opaque;
> +        TaskState *parent_ts = get_task_state(cpu);
>          new_thread_info info;
>          pthread_attr_t attr;
>
> @@ -6680,7 +6680,7 @@ static int do_fork(CPUArchState *env, unsigned int
> flags, abi_ulong newsp,
>                  put_user_u32(sys_gettid(), child_tidptr);
>              if (flags & CLONE_PARENT_SETTID)
>                  put_user_u32(sys_gettid(), parent_tidptr);
> -            ts = (TaskState *)cpu->opaque;
> +            ts = get_task_state(cpu);
>              if (flags & CLONE_SETTLS)
>                  cpu_set_tls (env, newtls);
>              if (flags & CLONE_CHILD_CLEARTID)
> @@ -7946,7 +7946,7 @@ int host_to_target_waitstatus(int status)
>  static int open_self_cmdline(CPUArchState *cpu_env, int fd)
>  {
>      CPUState *cpu = env_cpu(cpu_env);
> -    struct linux_binprm *bprm = ((TaskState *)cpu->opaque)->bprm;
> +    struct linux_binprm *bprm = get_task_state(cpu)->bprm;
>      int i;
>
>      for (i = 0; i < bprm->argc; i++) {
> @@ -8130,7 +8130,7 @@ static int open_self_smaps(CPUArchState *cpu_env,
> int fd)
>  static int open_self_stat(CPUArchState *cpu_env, int fd)
>  {
>      CPUState *cpu = env_cpu(cpu_env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      g_autoptr(GString) buf = g_string_new(NULL);
>      int i;
>
> @@ -8171,7 +8171,7 @@ static int open_self_stat(CPUArchState *cpu_env, int
> fd)
>  static int open_self_auxv(CPUArchState *cpu_env, int fd)
>  {
>      CPUState *cpu = env_cpu(cpu_env);
> -    TaskState *ts = cpu->opaque;
> +    TaskState *ts = get_task_state(cpu);
>      abi_ulong auxv = ts->info->saved_auxv;
>      abi_ulong len = ts->info->auxv_len;
>      char *ptr;
> @@ -8996,7 +8996,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>          pthread_mutex_lock(&clone_lock);
>
>          if (CPU_NEXT(first_cpu)) {
> -            TaskState *ts = cpu->opaque;
> +            TaskState *ts = get_task_state(cpu);
>
>              if (ts->child_tidptr) {
>                  put_user_u32(0, ts->child_tidptr);
> @@ -9423,7 +9423,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>  #ifdef TARGET_NR_pause /* not on alpha */
>      case TARGET_NR_pause:
>          if (!block_signals()) {
> -            sigsuspend(&((TaskState *)cpu->opaque)->signal_mask);
> +            sigsuspend(&get_task_state(cpu)->signal_mask);
>          }
>          return -TARGET_EINTR;
>  #endif
> @@ -9989,7 +9989,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>              sigset_t *set;
>
>  #if defined(TARGET_ALPHA)
> -            TaskState *ts = cpu->opaque;
> +            TaskState *ts = get_task_state(cpu);
>              /* target_to_host_old_sigset will bswap back */
>              abi_ulong mask = tswapal(arg1);
>              set = &ts->sigsuspend_mask;
> @@ -10390,7 +10390,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>      case TARGET_NR_mprotect:
>          arg1 = cpu_untagged_addr(cpu, arg1);
>          {
> -            TaskState *ts = cpu->opaque;
> +            TaskState *ts = get_task_state(cpu);
>              /* Special hack to detect libc making the stack executable.
> */
>              if ((arg3 & PROT_GROWSDOWN)
>                  && arg1 >= ts->info->stack_limit
> @@ -12521,7 +12521,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>        return do_set_thread_area(cpu_env, arg1);
>  #elif defined(TARGET_M68K)
>        {
> -          TaskState *ts = cpu->opaque;
> +          TaskState *ts = get_task_state(cpu);
>            ts->tp_value = arg1;
>            return 0;
>        }
> @@ -12535,7 +12535,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>          return do_get_thread_area(cpu_env, arg1);
>  #elif defined(TARGET_M68K)
>          {
> -            TaskState *ts = cpu->opaque;
> +            TaskState *ts = get_task_state(cpu);
>              return ts->tp_value;
>          }
>  #else
> @@ -12660,7 +12660,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env,
> int num, abi_long arg1,
>  #if defined(TARGET_NR_set_tid_address)
>      case TARGET_NR_set_tid_address:
>      {
> -        TaskState *ts = cpu->opaque;
> +        TaskState *ts = get_task_state(cpu);
>          ts->child_tidptr = arg1;
>          /* do not call host set_tid_address() syscall, instead return
> tid() */
>          return get_errno(sys_gettid());
> diff --git a/linux-user/vm86.c b/linux-user/vm86.c
> index c2facf3fc2d..9f512a2242b 100644
> --- a/linux-user/vm86.c
> +++ b/linux-user/vm86.c
> @@ -74,7 +74,7 @@ static inline unsigned int vm_getl(CPUX86State *env,
>  void save_v86_state(CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>      struct target_vm86plus_struct * target_v86;
>
>      if (!lock_user_struct(VERIFY_WRITE, target_v86, ts->target_v86, 0))
> @@ -134,7 +134,7 @@ static inline void return_to_32bit(CPUX86State *env,
> int retval)
>  static inline int set_IF(CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>
>      ts->v86flags |= VIF_MASK;
>      if (ts->v86flags & VIP_MASK) {
> @@ -147,7 +147,7 @@ static inline int set_IF(CPUX86State *env)
>  static inline void clear_IF(CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>
>      ts->v86flags &= ~VIF_MASK;
>  }
> @@ -165,7 +165,7 @@ static inline void clear_AC(CPUX86State *env)
>  static inline int set_vflags_long(unsigned long eflags, CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>
>      set_flags(ts->v86flags, eflags, ts->v86mask);
>      set_flags(env->eflags, eflags, SAFE_MASK);
> @@ -179,7 +179,7 @@ static inline int set_vflags_long(unsigned long
> eflags, CPUX86State *env)
>  static inline int set_vflags_short(unsigned short flags, CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>
>      set_flags(ts->v86flags, flags, ts->v86mask & 0xffff);
>      set_flags(env->eflags, flags, SAFE_MASK);
> @@ -193,7 +193,7 @@ static inline int set_vflags_short(unsigned short
> flags, CPUX86State *env)
>  static inline unsigned int get_vflags(CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>      unsigned int flags;
>
>      flags = env->eflags & RETURN_MASK;
> @@ -210,7 +210,7 @@ static inline unsigned int get_vflags(CPUX86State *env)
>  static void do_int(CPUX86State *env, int intno)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>      uint32_t int_addr, segoffs, ssp;
>      unsigned int sp;
>
> @@ -269,7 +269,7 @@ void handle_vm86_trap(CPUX86State *env, int trapno)
>  void handle_vm86_fault(CPUX86State *env)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>      uint32_t csp, ssp;
>      unsigned int ip, sp, newflags, newip, newcs, opcode, intno;
>      int data32, pref_done;
> @@ -394,7 +394,7 @@ void handle_vm86_fault(CPUX86State *env)
>  int do_vm86(CPUX86State *env, long subfunction, abi_ulong vm86_addr)
>  {
>      CPUState *cs = env_cpu(env);
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>      struct target_vm86plus_struct * target_v86;
>      int ret;
>
> diff --git a/linux-user/xtensa/signal.c b/linux-user/xtensa/signal.c
> index 32dcfa52291..003208a9161 100644
> --- a/linux-user/xtensa/signal.c
> +++ b/linux-user/xtensa/signal.c
> @@ -157,7 +157,7 @@ void setup_rt_frame(int sig, struct target_sigaction
> *ka,
>  {
>      abi_ulong frame_addr;
>      struct target_rt_sigframe *frame;
> -    int is_fdpic = info_is_fdpic(((TaskState *)thread_cpu->opaque)->info);
> +    int is_fdpic = info_is_fdpic(get_task_state(thread_cpu)->info);
>      abi_ulong handler = 0;
>      abi_ulong handler_fdpic_GOT = 0;
>      uint32_t ra;
> diff --git a/plugins/api.c b/plugins/api.c
> index 5521b0ad36c..1d7b72c0f67 100644
> --- a/plugins/api.c
> +++ b/plugins/api.c
> @@ -392,7 +392,7 @@ const char *qemu_plugin_path_to_binary(void)
>  {
>      char *path = NULL;
>  #ifdef CONFIG_USER_ONLY
> -    TaskState *ts = (TaskState *) current_cpu->opaque;
> +    TaskState *ts = get_task_state(current_cpu);
>      path = g_strdup(ts->bprm->filename);
>  #endif
>      return path;
> @@ -402,7 +402,7 @@ uint64_t qemu_plugin_start_code(void)
>  {
>      uint64_t start = 0;
>  #ifdef CONFIG_USER_ONLY
> -    TaskState *ts = (TaskState *) current_cpu->opaque;
> +    TaskState *ts = get_task_state(current_cpu);
>      start = ts->info->start_code;
>  #endif
>      return start;
> @@ -412,7 +412,7 @@ uint64_t qemu_plugin_end_code(void)
>  {
>      uint64_t end = 0;
>  #ifdef CONFIG_USER_ONLY
> -    TaskState *ts = (TaskState *) current_cpu->opaque;
> +    TaskState *ts = get_task_state(current_cpu);
>      end = ts->info->end_code;
>  #endif
>      return end;
> @@ -422,7 +422,7 @@ uint64_t qemu_plugin_entry_code(void)
>  {
>      uint64_t entry = 0;
>  #ifdef CONFIG_USER_ONLY
> -    TaskState *ts = (TaskState *) current_cpu->opaque;
> +    TaskState *ts = get_task_state(current_cpu);
>      entry = ts->info->entry;
>  #endif
>      return entry;
> diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
> index 329ea112607..d78c6428b90 100644
> --- a/semihosting/arm-compat-semi.c
> +++ b/semihosting/arm-compat-semi.c
> @@ -214,7 +214,7 @@ static target_ulong syscall_err;
>  static inline uint32_t get_swi_errno(CPUState *cs)
>  {
>  #ifdef CONFIG_USER_ONLY
> -    TaskState *ts = cs->opaque;
> +    TaskState *ts = get_task_state(cs);
>
>      return ts->swi_errno;
>  #else
> @@ -226,7 +226,7 @@ static void common_semi_cb(CPUState *cs, uint64_t ret,
> int err)
>  {
>      if (err) {
>  #ifdef CONFIG_USER_ONLY
> -        TaskState *ts = cs->opaque;
> +        TaskState *ts = get_task_state(cs);
>          ts->swi_errno = err;
>  #else
>          syscall_err = err;
> @@ -586,7 +586,7 @@ void do_common_semihosting(CPUState *cs)
>  #if !defined(CONFIG_USER_ONLY)
>              const char *cmdline;
>  #else
> -            TaskState *ts = cs->opaque;
> +            TaskState *ts = get_task_state(cs);
>  #endif
>              GET_ARG(0);
>              GET_ARG(1);
> @@ -664,7 +664,7 @@ void do_common_semihosting(CPUState *cs)
>              target_ulong retvals[4];
>              int i;
>  #ifdef CONFIG_USER_ONLY
> -            TaskState *ts = cs->opaque;
> +            TaskState *ts = get_task_state(cs);
>              target_ulong limit;
>  #else
>              LayoutInfo info = common_semi_find_bases(cs);
> --
> 2.43.2
>
>

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