[1/3] x86-64: Move LP_SIZE definition to its own header

  This way, we can define the pointer guard macros without including
<sysdep.h> on x86-64.  Other architectures will not have such an
inclusion dependency, and the implied header file inclusion would
create a porting hazard.
---
 sysdeps/x86_64/sysdep.h          |  7 +------
 sysdeps/x86_64/x32/sysdep.h      |  6 +-----
 sysdeps/x86_64/x32/x86-lp_size.h | 23 +++++++++++++++++++++++
 sysdeps/x86_64/x86-lp_size.h     | 23 +++++++++++++++++++++++
 4 files changed, 48 insertions(+), 11 deletions(-)
 create mode 100644 sysdeps/x86_64/x32/x86-lp_size.h
 create mode 100644 sysdeps/x86_64/x86-lp_size.h
  

On 13/10/22 09:20, Florian Weimer via Libc-alpha wrote:
> This way, we can define the pointer guard macros without including
> <sysdep.h> on x86-64.  Other architectures will not have such an
> inclusion dependency, and the implied header file inclusion would
> create a porting hazard.

LGTM with a minor nit below.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

> ---
>  sysdeps/x86_64/sysdep.h          |  7 +------
>  sysdeps/x86_64/x32/sysdep.h      |  6 +-----
>  sysdeps/x86_64/x32/x86-lp_size.h | 23 +++++++++++++++++++++++
>  sysdeps/x86_64/x86-lp_size.h     | 23 +++++++++++++++++++++++
>  4 files changed, 48 insertions(+), 11 deletions(-)
>  create mode 100644 sysdeps/x86_64/x32/x86-lp_size.h
>  create mode 100644 sysdeps/x86_64/x86-lp_size.h
> 
> diff --git a/sysdeps/x86_64/sysdep.h b/sysdeps/x86_64/sysdep.h
> index 7f5defa4ec..d1a43dc14c 100644
> --- a/sysdeps/x86_64/sysdep.h
> +++ b/sysdeps/x86_64/sysdep.h
> @@ -20,6 +20,7 @@
>  #define _X86_64_SYSDEP_H 1
>  
>  #include <sysdeps/x86/sysdep.h>
> +#include <x86-lp_size.h>
>  
>  #ifdef	__ASSEMBLER__
>  
> @@ -68,9 +69,6 @@ lose:									      \
>  # define JUMPTARGET(name)	name
>  #endif
>  
> -/* Long and pointer size in bytes.  */
> -#define LP_SIZE	8
> -
>  /* Instruction to operate on long and pointer.  */
>  #define LP_OP(insn) insn##q
>  
> @@ -137,9 +135,6 @@ lose:									      \
>  
>  #else	/* __ASSEMBLER__ */
>  
> -/* Long and pointer size in bytes.  */
> -#define LP_SIZE "8"
> -
>  /* Instruction to operate on long and pointer.  */
>  #define LP_OP(insn) #insn "q"
>  
> diff --git a/sysdeps/x86_64/x32/sysdep.h b/sysdeps/x86_64/x32/sysdep.h
> index 645ea4ae69..92d987780d 100644
> --- a/sysdeps/x86_64/x32/sysdep.h
> +++ b/sysdeps/x86_64/x32/sysdep.h
> @@ -17,8 +17,8 @@
>     <https://www.gnu.org/licenses/>.  */
>  
>  #include <sysdeps/x86_64/sysdep.h>
> +#include <x86-lp_size.h>
>  
> -#undef LP_SIZE
>  #undef LP_OP
>  #undef ASM_ADDR
>  
> @@ -41,8 +41,6 @@
>  
>  #ifdef	__ASSEMBLER__
>  
> -# define LP_SIZE 4
> -
>  # define LP_OP(insn) insn##l
>  
>  # define ASM_ADDR .long
> @@ -66,8 +64,6 @@
>  
>  #else	/* __ASSEMBLER__ */
>  
> -# define LP_SIZE "4"
> -
>  # define LP_OP(insn) #insn "l"
>  
>  # define ASM_ADDR ".long"
> diff --git a/sysdeps/x86_64/x32/x86-lp_size.h b/sysdeps/x86_64/x32/x86-lp_size.h
> new file mode 100644
> index 0000000000..ad03eb66b2
> --- /dev/null
> +++ b/sysdeps/x86_64/x32/x86-lp_size.h
> @@ -0,0 +1,23 @@
> +/* Pointer size definition for x86-64 x42.

s/42/32

> +   Copyright (C) 2022 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#ifdef __ASSEMBLER__
> +# define LP_SIZE 4
> +#else
> +# define LP_SIZE "4"
> +#endif
> diff --git a/sysdeps/x86_64/x86-lp_size.h b/sysdeps/x86_64/x86-lp_size.h
> new file mode 100644
> index 0000000000..76877240e8
> --- /dev/null
> +++ b/sysdeps/x86_64/x86-lp_size.h
> @@ -0,0 +1,23 @@
> +/* Pointer size definition for x86-64.
> +   Copyright (C) 2022 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#ifdef __ASSEMBLER__
> +# define LP_SIZE 8
> +#else
> +# define LP_SIZE "8"
> +#endif