linux-kernel - [PATCH v3 0/8] Enable pt_regs based syscalls for x86-32 native

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Message-Id: <20200227132826.195669-1-brgerst@gmail.com>
Date:   Thu, 27 Feb 2020 08:28:18 -0500
From:   Brian Gerst <brgerst@...il.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Brian Gerst <brgerst@...il.com>
Subject: [PATCH v3 0/8] Enable pt_regs based syscalls for x86-32 native

This patch series cleans up the x86 syscall wrapper code and converts
the 32-bit native kernel over to pt_regs based syscalls.  This makes
the 32-bit syscall interface consistent with 64-bit, and a bit more
effecient by not blindly pushing all 6 potential arguments onto the
stack.

Changes since v2:
- Moved adding the [compat_]sys_ prefix to the ABI-level macros

Changes since v1:
- Split patch 1 into multiple patches
- Updated comments and patch notes to clarify changes

Brian Gerst (8):
  x86, syscalls: Refactor SYSCALL_DEFINEx macros
  x86, syscalls: Refactor SYSCALL_DEFINE0 macros
  x86, syscalls: Refactor COND_SYSCALL macros
  x86, syscalls: Refactor SYS_NI macros
  x86: Move 32-bit compat syscalls to common location
  x86-32: Enable syscall wrappers
  x86-64: Use syscall wrappers for x32_rt_sigreturn
  x86: Drop asmlinkage from syscalls

 arch/x86/Kconfig                       |   2 +-
 arch/x86/entry/common.c                |  20 +-
 arch/x86/entry/syscall_32.c            |  13 +-
 arch/x86/entry/syscall_64.c            |   9 +-
 arch/x86/entry/syscalls/syscall_32.tbl | 818 ++++++++++++-------------
 arch/x86/entry/syscalls/syscall_64.tbl |   2 +-
 arch/x86/entry/syscalls/syscalltbl.sh  |  33 +-
 arch/x86/ia32/Makefile                 |   2 +-
 arch/x86/include/asm/sighandling.h     |   5 -
 arch/x86/include/asm/syscall.h         |   8 +-
 arch/x86/include/asm/syscall_wrapper.h | 310 +++++-----
 arch/x86/include/asm/syscalls.h        |  29 -
 arch/x86/kernel/Makefile               |   2 +
 arch/x86/kernel/signal.c               |   2 +-
 arch/x86/{ia32 => kernel}/sys_ia32.c   | 130 ++--
 arch/x86/um/sys_call_table_32.c        |  10 +
 16 files changed, 691 insertions(+), 704 deletions(-)
 rename arch/x86/{ia32 => kernel}/sys_ia32.c (83%)

-- 
2.24.1