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Date: Sun, 29 Sep 2019 23:54:39 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH V3] riscv64: Change container for riscv
 floating-point state to __riscv_mc_fp_state

On Sat, Sep 28, 2019 at 05:31:01PM -0700, Khem Raj wrote:
> Match the struct elements with glibc
> glibc also uses __riscv_mc prefix, some packages like gdb uses that
> include signal.h in sys/user.h for __riscv_mc_fp_state type definition
> 
> Signed-off-by: Khem Raj <raj.khem@...il.com>
> ---
> v2: Include bits/signal.h in sys/user.h
> v3: Replace bits/signal.h with signal.h
> 
>  arch/riscv64/bits/signal.h | 18 +++++++++---------
>  arch/riscv64/bits/user.h   |  4 +++-
>  2 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/riscv64/bits/signal.h b/arch/riscv64/bits/signal.h
> index 76d7ad80..aba7ab00 100644
> --- a/arch/riscv64/bits/signal.h
> +++ b/arch/riscv64/bits/signal.h
> @@ -13,25 +13,25 @@ typedef unsigned long greg_t;
>  typedef unsigned long gregset_t[32];
>  
>  struct __riscv_mc_f_ext_state {
> -	unsigned int f[32];
> -	unsigned int fcsr;
> +	unsigned int __f[32];
> +	unsigned int __fcsr;
>  };
>  
>  struct __riscv_mc_d_ext_state {
> -	unsigned long long f[32];
> -	unsigned int fcsr;
> +	unsigned long long __f[32];
> +	unsigned int __fcsr;
>  };
>  
>  struct __riscv_mc_q_ext_state {
> -	unsigned long long f[64] __attribute__((aligned(16)));
> -	unsigned int fcsr;
> +	unsigned long long __f[64] __attribute__((aligned(16)));
> +	unsigned int __fcsr;
>  	unsigned int reserved[3];
>  };
>  
>  union __riscv_mc_fp_state {
> -	struct __riscv_mc_f_ext_state f;
> -	struct __riscv_mc_d_ext_state d;
> -	struct __riscv_mc_q_ext_state q;
> +	struct __riscv_mc_f_ext_state __f;
> +	struct __riscv_mc_d_ext_state __d;
> +	struct __riscv_mc_q_ext_state __q;
>  };
>  
>  typedef union __riscv_mc_fp_state fpregset_t;
> diff --git a/arch/riscv64/bits/user.h b/arch/riscv64/bits/user.h
> index d2e383b2..9cc0bc70 100644
> --- a/arch/riscv64/bits/user.h
> +++ b/arch/riscv64/bits/user.h
> @@ -1,3 +1,5 @@
> +#include <signal.h>
> +
>  struct user_fpregs_struct {
>  	double f[32];
>  	unsigned int fcsr;
> @@ -5,4 +7,4 @@ struct user_fpregs_struct {
>  
>  #define ELF_NGREG 32
>  typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
> -typedef struct user_fpregs_struct elf_fpregset_t;
> +typedef union __riscv_mc_fp_state elf_fpregset_t;
> -- 
> 2.23.0

I'm splitting this into two parts, one modifying bits/signal.h to fix
the above and other issues there, and the other to fix bits/user.h and
further remove the unused struct user_fpregs_struct which had no
precedent. Crediting you as the basis for both. Thanks!

Rich

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