[0/2] arch: Sync all syscall tables with 2 newly added system calls

Message

Sohil Mehta Sept. 11, 2023, 6:02 p.m. UTC

6.6-rc1 has added support for 2 new system calls:
[1] fchmodat2()
[2] x86-specific map_shadow_stack()

This series mainly synchronizes the syscall tables arcoss the core kernel and
tools to reflect the recent updates.

For fchmodat2(), it fixes the missing entries in the tools directory.

For map_shadow_stack(), it reserves the syscall across the board. Since
map_shadow_stack() is x86 specific for now, it is marked as a conditional
syscall in sys_ni.c. Adding it to the syscall tables of other architectures is
harmless and would return ENOSYS when exercised.

Reserving arch-specific syscall numbers in the tables of all architectures is
good practice and would help avoid future conflicts.

[1]: https://lore.kernel.org/lkml/20230824-frohlocken-vorabend-725f6fdaad50@brauner/
[2]: https://lore.kernel.org/lkml/[e-mail]/

Sohil Mehta (2):
  tools headers UAPI: Sync fchmodat2() syscall table entries
  arch: Reserve map_shadow_stack() syscall number for all architectures

 arch/alpha/kernel/syscalls/syscall.tbl              | 1 +
 arch/arm/tools/syscall.tbl                          | 1 +
 arch/arm64/include/asm/unistd.h                     | 2 +-
 arch/arm64/include/asm/unistd32.h                   | 2 ++
 arch/ia64/kernel/syscalls/syscall.tbl               | 1 +
 arch/m68k/kernel/syscalls/syscall.tbl               | 1 +
 arch/microblaze/kernel/syscalls/syscall.tbl         | 1 +
 arch/mips/kernel/syscalls/syscall_n32.tbl           | 1 +
 arch/mips/kernel/syscalls/syscall_n64.tbl           | 1 +
 arch/mips/kernel/syscalls/syscall_o32.tbl           | 1 +
 arch/parisc/kernel/syscalls/syscall.tbl             | 1 +
 arch/powerpc/kernel/syscalls/syscall.tbl            | 1 +
 arch/s390/kernel/syscalls/syscall.tbl               | 1 +
 arch/sh/kernel/syscalls/syscall.tbl                 | 1 +
 arch/sparc/kernel/syscalls/syscall.tbl              | 1 +
 arch/x86/entry/syscalls/syscall_32.tbl              | 1 +
 arch/xtensa/kernel/syscalls/syscall.tbl             | 1 +
 include/uapi/asm-generic/unistd.h                   | 5 ++++-
 tools/include/uapi/asm-generic/unistd.h             | 8 +++++++-
 tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl | 2 ++
 tools/perf/arch/powerpc/entry/syscalls/syscall.tbl  | 2 ++
 tools/perf/arch/s390/entry/syscalls/syscall.tbl     | 2 ++
 tools/perf/arch/x86/entry/syscalls/syscall_64.tbl   | 2 ++
 23 files changed, 37 insertions(+), 3 deletions(-)


base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d

Comments

Sohil Mehta Sept. 13, 2023, 7:32 p.m. UTC | #1

On 9/11/2023 11:02 AM, Sohil Mehta wrote:
> Sohil Mehta (2):
>   tools headers UAPI: Sync fchmodat2() syscall table entries

I now see a patch by Arnaldo that does something similar:
https://lore.kernel.org/lkml/[e-mail]/

Also, it states that:

"The tools/perf/check-headers.sh script, part of the tools/ build
process, points out changes in the original files.

So its important not to touch the copies in tools/ when doing changes in
the original kernel headers, that will be done later, when
check-headers.sh inform about the change to the perf tools hackers."

I was unaware of this and therefore I'll drop all the tools/ related
changes from this series.

Sohil