From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org, Florian Weimer <fweimer@redhat.com>
Subject: Re: [PATCH 1/3] x86-64: Move LP_SIZE definition to its own header
Date: Mon, 17 Oct 2022 13:03:55 -0300 [thread overview]
Message-ID: <60a02a88-9f0c-3de4-cf8a-6f8dbc12075a@linaro.org> (raw)
In-Reply-To: <350d9d552bc44b1df01e567135ff9eed4569164f.1665663395.git.fweimer@redhat.com>
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
next prev parent reply other threads:[~2022-10-17 16:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-13 12:20 [PATCH 0/3] PTR_MANGLE/PTR_DEMANGLE refactoring Florian Weimer
2022-10-13 12:20 ` [PATCH 1/3] x86-64: Move LP_SIZE definition to its own header Florian Weimer
2022-10-17 16:03 ` Adhemerval Zanella Netto [this message]
2022-10-13 12:20 ` [PATCH 2/3] Introduce <pointer_guard.h>, extracted from <sysdep.h> Florian Weimer
2022-10-14 3:30 ` DJ Delorie
2022-10-14 8:14 ` Florian Weimer
2022-10-17 16:13 ` Adhemerval Zanella Netto
2022-10-18 15:03 ` Florian Weimer
2022-10-13 12:20 ` [PATCH 3/3] Use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources Florian Weimer
2022-10-17 16:15 ` Adhemerval Zanella Netto
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