Re: [Qemu-devel] [PATCH 17/18] linux-user: Make target_strerror() return 'const char *'

[Laurent Vivier <laurent@vivier.eu>]

Le 06/06/2016 à 20:58, Peter Maydell a écrit :
> Make target_strerror() return 'const char *' rather than just 'char *';
> this will allow us to return constant strings from it for some special
> cases.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Laurent Vivier <laurent@vivier.eu>

> ---
>  linux-user/qemu.h    | 2 +-
>  linux-user/strace.c  | 4 ++--
>  linux-user/syscall.c | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/linux-user/qemu.h b/linux-user/qemu.h
> index 6bd7b32..56f29c3 100644
> --- a/linux-user/qemu.h
> +++ b/linux-user/qemu.h
> @@ -195,7 +195,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
>  void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
>  extern THREAD CPUState *thread_cpu;
>  void cpu_loop(CPUArchState *env);
> -char *target_strerror(int err);
> +const char *target_strerror(int err);
>  int get_osversion(void);
>  void init_qemu_uname_release(void);
>  void fork_start(void);
> diff --git a/linux-user/strace.c b/linux-user/strace.c
> index 0810c85..c5980a1 100644
> --- a/linux-user/strace.c
> +++ b/linux-user/strace.c
> @@ -281,7 +281,7 @@ print_ipc(const struct syscallname *name,
>  static void
>  print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
>  {
> -    char *errstr = NULL;
> +    const char *errstr = NULL;
>  
>      if (ret < 0) {
>          errstr = target_strerror(-ret);
> @@ -1594,7 +1594,7 @@ void
>  print_syscall_ret(int num, abi_long ret)
>  {
>      int i;
> -    char *errstr = NULL;
> +    const char *errstr = NULL;
>  
>      for(i=0;i<nsyscalls;i++)
>          if( scnames[i].nr == num ) {
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 249d246..bcee02d 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -617,7 +617,7 @@ static inline int is_error(abi_long ret)
>      return (abi_ulong)ret >= (abi_ulong)(-4096);
>  }
>  
> -char *target_strerror(int err)
> +const char *target_strerror(int err)
>  {
>      if ((err >= ERRNO_TABLE_SIZE) || (err < 0)) {
>          return NULL;
>