diff mbox series

[v2,2/2] Update sysvipc kernel-features.h files for Linux 5.1

Message ID 20190520175341.17310-2-adhemerval.zanella@linaro.org
State New
Headers show
Series [v2,1/2] ipc: Refactor sysvipc internal definitions | expand

Commit Message

Adhemerval Zanella Netto May 20, 2019, 5:53 p.m. UTC 
Changes from previous version:

  - Fixed condition to use wire-up syscalls for semop and semtimedop.

--

Linux 5.1 adds missing SySV IPC syscalls to the syscall table for
remanining one that still uses the ipc syscall on glibc (m68k, mips-o32,
powerpc, s390, sh, and sparc32).  However the newly added direct ipc
syscall are different than the old ones:

  1. They do not expect IPC_64, meaning __IPC_64 should be set to zero
     when new syscalls are used.  And new syscalls can not be used
     for compat functions like __old_semctl (to emulated old sysvipc it
     requires to use the old __NR_ipc syscall without __IPC_64).
     Thus IPC_64 is redefined for newer kernels on affected ABIs.

  2. semtimedop and semop does not exist on 32-bit ABIs (only
     semtimedop_time64 is supplied).  The provided syscall wrappers only
     uses the wire-up syscall if __NR_semtimedop and __NR_semop are
     also defined.

Checked on x86_64-linux-gnu and i686-linux-gnu on both a 4.15 kernel
configure with default options and sysvipc tests on a 5.1.2 kernel with
--enable-kernel=5.1.

	* sysdeps/unix/sysv/linux/i386/kernel-features.h.
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Only undefine if
	[__LINUX_KERNEL_VERSION < 0x050100].
	(__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/s390/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/sh/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/sparc/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
	* sysdeps/unix/sysv/linux/msgctl.c (__old_msgctl): Only use wire-up
	syscall if __ASSUME_SYSVIPC_DEFAULT_IPC_64 is not defined.
	* sysdeps/unix/sysv/linux/semctl.c (__old_semctl): Likewise.
	* sysdeps/unix/sysv/linux/shmctl.c (__old_shmctl): Likewise.
	* sysdeps/unix/sysv/linux/semop.c (semop): Only use wire-up if
	__NR_semop is also defined.
	* sysdeps/unix/sysv/linux/semtimedop.c (semtimedop): Likewise.
---
 sysdeps/unix/sysv/linux/i386/kernel-features.h    |  8 +++++---
 sysdeps/unix/sysv/linux/m68k/kernel-features.h    |  8 +++++---
 sysdeps/unix/sysv/linux/mips/kernel-features.h    | 12 ++++++++----
 sysdeps/unix/sysv/linux/msgctl.c                  |  6 +++++-
 sysdeps/unix/sysv/linux/powerpc/kernel-features.h |  8 +++++---
 sysdeps/unix/sysv/linux/s390/kernel-features.h    |  8 +++++---
 sysdeps/unix/sysv/linux/semctl.c                  |  6 +++++-
 sysdeps/unix/sysv/linux/semop.c                   |  4 +++-
 sysdeps/unix/sysv/linux/semtimedop.c              |  4 +++-
 sysdeps/unix/sysv/linux/sh/kernel-features.h      |  8 +++++---
 sysdeps/unix/sysv/linux/shmctl.c                  |  6 +++++-
 sysdeps/unix/sysv/linux/sparc/kernel-features.h   | 10 ++++++----
 12 files changed, 60 insertions(+), 28 deletions(-)

Comments

Joseph Myers May 20, 2019, 7:10 p.m. UTC | #1 
As a general issue in this patch, you're missing spaces before '(' in 
calls to 'defined'.  'defined' should be treated like a function for this 
purpose, and have such spaces (the parentheses are optional, you can just 
do "defined MACRO").
Adhemerval Zanella Netto May 20, 2019, 7:20 p.m. UTC | #2 
On 20/05/2019 16:10, Joseph Myers wrote:
> As a general issue in this patch, you're missing spaces before '(' in 
> calls to 'defined'.  'defined' should be treated like a function for this 
> purpose, and have such spaces (the parentheses are optional, you can just 
> do "defined MACRO").
> 

Alright, I change it locally to add the required spaces.  Thanks for pointing 
this out.
Adhemerval Zanella Netto Aug. 28, 2019, 2:07 p.m. UTC | #3 
Ping (x2) with Joseph raised issue corrected (missing spaces before '(' in 
calls to 'defined', 'defined' should be treated like a function, and have
such spaces added).

On 20/05/2019 14:53, Adhemerval Zanella wrote:
> Changes from previous version:
> 
>   - Fixed condition to use wire-up syscalls for semop and semtimedop.
> 
> --
> 
> Linux 5.1 adds missing SySV IPC syscalls to the syscall table for
> remanining one that still uses the ipc syscall on glibc (m68k, mips-o32,
> powerpc, s390, sh, and sparc32).  However the newly added direct ipc
> syscall are different than the old ones:
> 
>   1. They do not expect IPC_64, meaning __IPC_64 should be set to zero
>      when new syscalls are used.  And new syscalls can not be used
>      for compat functions like __old_semctl (to emulated old sysvipc it
>      requires to use the old __NR_ipc syscall without __IPC_64).
>      Thus IPC_64 is redefined for newer kernels on affected ABIs.
> 
>   2. semtimedop and semop does not exist on 32-bit ABIs (only
>      semtimedop_time64 is supplied).  The provided syscall wrappers only
>      uses the wire-up syscall if __NR_semtimedop and __NR_semop are
>      also defined.
> 
> Checked on x86_64-linux-gnu and i686-linux-gnu on both a 4.15 kernel
> configure with default options and sysvipc tests on a 5.1.2 kernel with
> --enable-kernel=5.1.
> 
> 	* sysdeps/unix/sysv/linux/i386/kernel-features.h.
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Only undefine if
> 	[__LINUX_KERNEL_VERSION < 0x050100].
> 	(__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
> 	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/mips/kernel-features.h
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
> 	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
> 	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/s390/kernel-features.h
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
> 	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/sh/kernel-features.h
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
> 	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/sparc/kernel-features.h
> 	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS,
> 	__ASSUME_SYSVIPC_DEFAULT_IPC_64): Likewise.
> 	* sysdeps/unix/sysv/linux/msgctl.c (__old_msgctl): Only use wire-up
> 	syscall if __ASSUME_SYSVIPC_DEFAULT_IPC_64 is not defined.
> 	* sysdeps/unix/sysv/linux/semctl.c (__old_semctl): Likewise.
> 	* sysdeps/unix/sysv/linux/shmctl.c (__old_shmctl): Likewise.
> 	* sysdeps/unix/sysv/linux/semop.c (semop): Only use wire-up if
> 	__NR_semop is also defined.
> 	* sysdeps/unix/sysv/linux/semtimedop.c (semtimedop): Likewise.
> ---
>  sysdeps/unix/sysv/linux/i386/kernel-features.h    |  8 +++++---
>  sysdeps/unix/sysv/linux/m68k/kernel-features.h    |  8 +++++---
>  sysdeps/unix/sysv/linux/mips/kernel-features.h    | 12 ++++++++----
>  sysdeps/unix/sysv/linux/msgctl.c                  |  6 +++++-
>  sysdeps/unix/sysv/linux/powerpc/kernel-features.h |  8 +++++---
>  sysdeps/unix/sysv/linux/s390/kernel-features.h    |  8 +++++---
>  sysdeps/unix/sysv/linux/semctl.c                  |  6 +++++-
>  sysdeps/unix/sysv/linux/semop.c                   |  4 +++-
>  sysdeps/unix/sysv/linux/semtimedop.c              |  4 +++-
>  sysdeps/unix/sysv/linux/sh/kernel-features.h      |  8 +++++---
>  sysdeps/unix/sysv/linux/shmctl.c                  |  6 +++++-
>  sysdeps/unix/sysv/linux/sparc/kernel-features.h   | 10 ++++++----
>  12 files changed, 60 insertions(+), 28 deletions(-)
> 
> diff --git a/sysdeps/unix/sysv/linux/i386/kernel-features.h b/sysdeps/unix/sysv/linux/i386/kernel-features.h
> index 411eb2fca4..8c398ddd1f 100644
> --- a/sysdeps/unix/sysv/linux/i386/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/i386/kernel-features.h
> @@ -43,9 +43,11 @@
>  # undef __ASSUME_SENDTO_SYSCALL
>  #endif
>  
> -/* i686 only supports ipc syscall.  */
> -#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> -#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +/* i686 only supports ipc syscall before 5.1.  */
> +#if __LINUX_KERNEL_VERSION < 0x050100
> +# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +#endif
>  
>  #undef __ASSUME_CLONE_DEFAULT
>  #define __ASSUME_CLONE_BACKWARDS	1
> diff --git a/sysdeps/unix/sysv/linux/m68k/kernel-features.h b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
> index 46418977c8..c9be6bc167 100644
> --- a/sysdeps/unix/sysv/linux/m68k/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
> @@ -50,6 +50,8 @@
>  # undef __ASSUME_SET_ROBUST_LIST
>  #endif
>  
> -/* m68k only supports ipc syscall.  */
> -#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> -#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +/* m68k only supports ipc syscall before 5.1.  */
> +#if __LINUX_KERNEL_VERSION < 0x050100
> +# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/mips/kernel-features.h b/sysdeps/unix/sysv/linux/mips/kernel-features.h
> index b9fa89c81d..8c85193a7a 100644
> --- a/sysdeps/unix/sysv/linux/mips/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/mips/kernel-features.h
> @@ -31,8 +31,12 @@
>     pairs to start with an even-number register.  */
>  #if _MIPS_SIM == _ABIO32
>  # define __ASSUME_ALIGNED_REGISTER_PAIRS	1
> -/* mips32 only supports ipc syscall.  */
> -# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +/* mips32 only supports ipc syscall before 5.1.  */
> +# if __LINUX_KERNEL_VERSION < 0x050100
> +#  undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +#  undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +# else
> +# endif
>  
>  /* The o32 MIPS fadvise64 syscall behaves as fadvise64_64.  */
>  # define __ASSUME_FADVISE64_AS_64_64		1
> @@ -40,6 +44,8 @@
>  /* mips32 support wire-up network syscalls.  */
>  # define __ASSUME_RECV_SYSCALL		1
>  # define __ASSUME_SEND_SYSCALL		1
> +#else
> +# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
>  #endif
>  
>  /* Define that mips64-n32 is a ILP32 ABI to set the correct interface to
> @@ -50,5 +56,3 @@
>  
>  #undef __ASSUME_CLONE_DEFAULT
>  #define __ASSUME_CLONE_BACKWARDS	1
> -
> -#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> diff --git a/sysdeps/unix/sysv/linux/msgctl.c b/sysdeps/unix/sysv/linux/msgctl.c
> index 2d49567686..1f034ebc6f 100644
> --- a/sysdeps/unix/sysv/linux/msgctl.c
> +++ b/sysdeps/unix/sysv/linux/msgctl.c
> @@ -61,7 +61,11 @@ int
>  attribute_compat_text_section
>  __old_msgctl (int msqid, int cmd, struct __old_msqid_ds *buf)
>  {
> -#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) \
> +    && !defined(__ASSUME_SYSVIPC_DEFAULT_IPC_64)
> +  /* For architecture that have wire-up msgctl but also have __IPC_64 to a
> +     value different than default (0x0), it means the old syscall was done
> +     using __NR_ipc.  */
>    return INLINE_SYSCALL_CALL (msgctl, msqid, cmd, buf);
>  #else
>    return INLINE_SYSCALL_CALL (ipc, IPCOP_msgctl, msqid, cmd, 0, buf);
> diff --git a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> index e787182396..fd2f22d730 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
> @@ -44,9 +44,11 @@
>  
>  #include_next <kernel-features.h>
>  
> -/* powerpc only supports ipc syscall.  */
> -#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> -#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +/* powerpc only supports ipc syscall before 5.1.  */
> +#if __LINUX_KERNEL_VERSION < 0x050100
> +# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +#endif
>  
>  #undef __ASSUME_CLONE_DEFAULT
>  #define __ASSUME_CLONE_BACKWARDS	1
> diff --git a/sysdeps/unix/sysv/linux/s390/kernel-features.h b/sysdeps/unix/sysv/linux/s390/kernel-features.h
> index 57077ea4cc..7997a78e1d 100644
> --- a/sysdeps/unix/sysv/linux/s390/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/s390/kernel-features.h
> @@ -45,9 +45,11 @@
>  # undef __ASSUME_SENDTO_SYSCALL
>  #endif
>  
> -/* s390 only supports ipc syscall.  */
> -#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> -#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +/* s390 only supports ipc syscall before 5.1.  */
> +#if __LINUX_KERNEL_VERSION < 0x050100
> +# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +#endif
>  
>  #undef __ASSUME_CLONE_DEFAULT
>  #define __ASSUME_CLONE_BACKWARDS2
> diff --git a/sysdeps/unix/sysv/linux/semctl.c b/sysdeps/unix/sysv/linux/semctl.c
> index d428400681..46bce6baac 100644
> --- a/sysdeps/unix/sysv/linux/semctl.c
> +++ b/sysdeps/unix/sysv/linux/semctl.c
> @@ -98,7 +98,11 @@ __old_semctl (int semid, int semnum, int cmd, ...)
>        break;
>      }
>  
> -# ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) \
> +    && !defined(__ASSUME_SYSVIPC_DEFAULT_IPC_64)
> + /* For architecture that have wire-up semctl but also have __IPC_64 to a
> +    value different than default (0x0), it means the old syscall was done
> +    using __NR_ipc.  */
>    return INLINE_SYSCALL_CALL (semctl, semid, semnum, cmd, arg.array);
>  # else
>    return INLINE_SYSCALL_CALL (ipc, IPCOP_semctl, semid, semnum, cmd,
> diff --git a/sysdeps/unix/sysv/linux/semop.c b/sysdeps/unix/sysv/linux/semop.c
> index 119ee06878..e401f3487b 100644
> --- a/sysdeps/unix/sysv/linux/semop.c
> +++ b/sysdeps/unix/sysv/linux/semop.c
> @@ -26,7 +26,9 @@
>  int
>  semop (int semid, struct sembuf *sops, size_t nsops)
>  {
> -#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +  /* semop wire-up syscall is not exported for 32-bit ABIs (they have
> +     semtimedop_time64 instead with uses a 64-bit time_t).  */
> +#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) && defined (__NR_semop)
>    return INLINE_SYSCALL_CALL (semop, semid, sops, nsops);
>  #else
>    return INLINE_SYSCALL_CALL (ipc, IPCOP_semop, semid, nsops, 0, sops);
> diff --git a/sysdeps/unix/sysv/linux/semtimedop.c b/sysdeps/unix/sysv/linux/semtimedop.c
> index 1d746c4117..589ffc3fc8 100644
> --- a/sysdeps/unix/sysv/linux/semtimedop.c
> +++ b/sysdeps/unix/sysv/linux/semtimedop.c
> @@ -27,7 +27,9 @@ int
>  semtimedop (int semid, struct sembuf *sops, size_t nsops,
>  	    const struct timespec *timeout)
>  {
> -#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +  /* semtimedop wire-up syscall is not exported for 32-bit ABIs (they have
> +     semtimedop_time64 instead with uses a 64-bit time_t).  */
> +#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) && defined (__NR_semtimedop)
>    return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout);
>  #else
>    return INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid,
> diff --git a/sysdeps/unix/sysv/linux/sh/kernel-features.h b/sysdeps/unix/sysv/linux/sh/kernel-features.h
> index cf68256abe..1721b89158 100644
> --- a/sysdeps/unix/sysv/linux/sh/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/sh/kernel-features.h
> @@ -41,9 +41,11 @@
>     before the offset.  */
>  #define __ASSUME_PRW_DUMMY_ARG	1
>  
> -/* sh only supports ipc syscall.  */
> -#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> -#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +/* sh only supports ipc syscall before 5.1.  */
> +#if __LINUX_KERNEL_VERSION < 0x050100
> +# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +#endif
>  
>  /* Support for several syscalls was added in 4.8.  */
>  #if __LINUX_KERNEL_VERSION < 0x040800
> diff --git a/sysdeps/unix/sysv/linux/shmctl.c b/sysdeps/unix/sysv/linux/shmctl.c
> index b322f205f8..40aa115b24 100644
> --- a/sysdeps/unix/sysv/linux/shmctl.c
> +++ b/sysdeps/unix/sysv/linux/shmctl.c
> @@ -63,7 +63,11 @@ int
>  attribute_compat_text_section
>  __old_shmctl (int shmid, int cmd, struct __old_shmid_ds *buf)
>  {
> -#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) \
> +    && !defined(__ASSUME_SYSVIPC_DEFAULT_IPC_64)
> +  /* For architecture that have wire-up shmctl but also have __IPC_64 to a
> +     value different than default (0x0), it means the old syscall was done
> +     using __NR_ipc.  */
>    return INLINE_SYSCALL_CALL (shmctl, shmid, cmd, buf);
>  #else
>    return INLINE_SYSCALL_CALL (ipc, IPCOP_shmctl, shmid, cmd, 0, buf);
> diff --git a/sysdeps/unix/sysv/linux/sparc/kernel-features.h b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
> index 82c8236c23..b8f2212002 100644
> --- a/sysdeps/unix/sysv/linux/sparc/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
> @@ -58,10 +58,12 @@
>  # undef __NR_pause
>  #endif
>  
> -/* sparc only supports ipc syscall.  */
> -#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> -#ifndef __arch64__
> -# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +/* sparc only supports ipc syscall before 5.1.  */
> +#if __LINUX_KERNEL_VERSION < 0x050100
> +# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
> +# if !defined __arch64__
> +#  undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
> +# endif
>  #endif
>  
>  /* Support for the renameat2 syscall was added in 3.16.  */
>
diff mbox series

Patch

diff --git a/sysdeps/unix/sysv/linux/i386/kernel-features.h b/sysdeps/unix/sysv/linux/i386/kernel-features.h
index 411eb2fca4..8c398ddd1f 100644
--- a/sysdeps/unix/sysv/linux/i386/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/i386/kernel-features.h
@@ -43,9 +43,11 @@ 
 # undef __ASSUME_SENDTO_SYSCALL
 #endif
 
-/* i686 only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+/* i686 only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS	1
diff --git a/sysdeps/unix/sysv/linux/m68k/kernel-features.h b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
index 46418977c8..c9be6bc167 100644
--- a/sysdeps/unix/sysv/linux/m68k/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
@@ -50,6 +50,8 @@ 
 # undef __ASSUME_SET_ROBUST_LIST
 #endif
 
-/* m68k only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+/* m68k only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+#endif
diff --git a/sysdeps/unix/sysv/linux/mips/kernel-features.h b/sysdeps/unix/sysv/linux/mips/kernel-features.h
index b9fa89c81d..8c85193a7a 100644
--- a/sysdeps/unix/sysv/linux/mips/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/mips/kernel-features.h
@@ -31,8 +31,12 @@ 
    pairs to start with an even-number register.  */
 #if _MIPS_SIM == _ABIO32
 # define __ASSUME_ALIGNED_REGISTER_PAIRS	1
-/* mips32 only supports ipc syscall.  */
-# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* mips32 only supports ipc syscall before 5.1.  */
+# if __LINUX_KERNEL_VERSION < 0x050100
+#  undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#  undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+# else
+# endif
 
 /* The o32 MIPS fadvise64 syscall behaves as fadvise64_64.  */
 # define __ASSUME_FADVISE64_AS_64_64		1
@@ -40,6 +44,8 @@ 
 /* mips32 support wire-up network syscalls.  */
 # define __ASSUME_RECV_SYSCALL		1
 # define __ASSUME_SEND_SYSCALL		1
+#else
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
 #endif
 
 /* Define that mips64-n32 is a ILP32 ABI to set the correct interface to
@@ -50,5 +56,3 @@ 
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS	1
-
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
diff --git a/sysdeps/unix/sysv/linux/msgctl.c b/sysdeps/unix/sysv/linux/msgctl.c
index 2d49567686..1f034ebc6f 100644
--- a/sysdeps/unix/sysv/linux/msgctl.c
+++ b/sysdeps/unix/sysv/linux/msgctl.c
@@ -61,7 +61,11 @@  int
 attribute_compat_text_section
 __old_msgctl (int msqid, int cmd, struct __old_msqid_ds *buf)
 {
-#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) \
+    && !defined(__ASSUME_SYSVIPC_DEFAULT_IPC_64)
+  /* For architecture that have wire-up msgctl but also have __IPC_64 to a
+     value different than default (0x0), it means the old syscall was done
+     using __NR_ipc.  */
   return INLINE_SYSCALL_CALL (msgctl, msqid, cmd, buf);
 #else
   return INLINE_SYSCALL_CALL (ipc, IPCOP_msgctl, msqid, cmd, 0, buf);
diff --git a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
index e787182396..fd2f22d730 100644
--- a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
@@ -44,9 +44,11 @@ 
 
 #include_next <kernel-features.h>
 
-/* powerpc only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+/* powerpc only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS	1
diff --git a/sysdeps/unix/sysv/linux/s390/kernel-features.h b/sysdeps/unix/sysv/linux/s390/kernel-features.h
index 57077ea4cc..7997a78e1d 100644
--- a/sysdeps/unix/sysv/linux/s390/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/s390/kernel-features.h
@@ -45,9 +45,11 @@ 
 # undef __ASSUME_SENDTO_SYSCALL
 #endif
 
-/* s390 only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+/* s390 only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS2
diff --git a/sysdeps/unix/sysv/linux/semctl.c b/sysdeps/unix/sysv/linux/semctl.c
index d428400681..46bce6baac 100644
--- a/sysdeps/unix/sysv/linux/semctl.c
+++ b/sysdeps/unix/sysv/linux/semctl.c
@@ -98,7 +98,11 @@  __old_semctl (int semid, int semnum, int cmd, ...)
       break;
     }
 
-# ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) \
+    && !defined(__ASSUME_SYSVIPC_DEFAULT_IPC_64)
+ /* For architecture that have wire-up semctl but also have __IPC_64 to a
+    value different than default (0x0), it means the old syscall was done
+    using __NR_ipc.  */
   return INLINE_SYSCALL_CALL (semctl, semid, semnum, cmd, arg.array);
 # else
   return INLINE_SYSCALL_CALL (ipc, IPCOP_semctl, semid, semnum, cmd,
diff --git a/sysdeps/unix/sysv/linux/semop.c b/sysdeps/unix/sysv/linux/semop.c
index 119ee06878..e401f3487b 100644
--- a/sysdeps/unix/sysv/linux/semop.c
+++ b/sysdeps/unix/sysv/linux/semop.c
@@ -26,7 +26,9 @@ 
 int
 semop (int semid, struct sembuf *sops, size_t nsops)
 {
-#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  /* semop wire-up syscall is not exported for 32-bit ABIs (they have
+     semtimedop_time64 instead with uses a 64-bit time_t).  */
+#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) && defined (__NR_semop)
   return INLINE_SYSCALL_CALL (semop, semid, sops, nsops);
 #else
   return INLINE_SYSCALL_CALL (ipc, IPCOP_semop, semid, nsops, 0, sops);
diff --git a/sysdeps/unix/sysv/linux/semtimedop.c b/sysdeps/unix/sysv/linux/semtimedop.c
index 1d746c4117..589ffc3fc8 100644
--- a/sysdeps/unix/sysv/linux/semtimedop.c
+++ b/sysdeps/unix/sysv/linux/semtimedop.c
@@ -27,7 +27,9 @@  int
 semtimedop (int semid, struct sembuf *sops, size_t nsops,
 	    const struct timespec *timeout)
 {
-#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  /* semtimedop wire-up syscall is not exported for 32-bit ABIs (they have
+     semtimedop_time64 instead with uses a 64-bit time_t).  */
+#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) && defined (__NR_semtimedop)
   return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout);
 #else
   return INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid,
diff --git a/sysdeps/unix/sysv/linux/sh/kernel-features.h b/sysdeps/unix/sysv/linux/sh/kernel-features.h
index cf68256abe..1721b89158 100644
--- a/sysdeps/unix/sysv/linux/sh/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/sh/kernel-features.h
@@ -41,9 +41,11 @@ 
    before the offset.  */
 #define __ASSUME_PRW_DUMMY_ARG	1
 
-/* sh only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
-#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+/* sh only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+#endif
 
 /* Support for several syscalls was added in 4.8.  */
 #if __LINUX_KERNEL_VERSION < 0x040800
diff --git a/sysdeps/unix/sysv/linux/shmctl.c b/sysdeps/unix/sysv/linux/shmctl.c
index b322f205f8..40aa115b24 100644
--- a/sysdeps/unix/sysv/linux/shmctl.c
+++ b/sysdeps/unix/sysv/linux/shmctl.c
@@ -63,7 +63,11 @@  int
 attribute_compat_text_section
 __old_shmctl (int shmid, int cmd, struct __old_shmid_ds *buf)
 {
-#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#if defined(__ASSUME_DIRECT_SYSVIPC_SYSCALLS) \
+    && !defined(__ASSUME_SYSVIPC_DEFAULT_IPC_64)
+  /* For architecture that have wire-up shmctl but also have __IPC_64 to a
+     value different than default (0x0), it means the old syscall was done
+     using __NR_ipc.  */
   return INLINE_SYSCALL_CALL (shmctl, shmid, cmd, buf);
 #else
   return INLINE_SYSCALL_CALL (ipc, IPCOP_shmctl, shmid, cmd, 0, buf);
diff --git a/sysdeps/unix/sysv/linux/sparc/kernel-features.h b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
index 82c8236c23..b8f2212002 100644
--- a/sysdeps/unix/sysv/linux/sparc/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
@@ -58,10 +58,12 @@ 
 # undef __NR_pause
 #endif
 
-/* sparc only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
-#ifndef __arch64__
-# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+/* sparc only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# if !defined __arch64__
+#  undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+# endif
 #endif
 
 /* Support for the renameat2 syscall was added in 3.16.  */