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mips: fix shmctl/semctl/msgctl syscall for o32

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The commit 275f22148e ("ipc: rename old-style shmctl/semctl/msgctl
syscalls") switched various architectures to use sys_old_*ctl() with
ipc_parse_version, including mips n32/n64. However, for mips o32, commit
0d6040d468 ("arch: add split IPC system calls where needed") added
separate IPC syscalls without properly using the old-style handlers.

This causes applications using uClibc-ng to fail with -EINVAL when
calling semctl/shmctl/msgctl with IPC_64 flag, as uClibc-ng uses the
syscall numbers from kernel headers to determine whether to use the IPC
multiplexer or split syscalls. In contrast, glibc is unaffected as it
uses a unified feature test macro __ASSUME_DIRECT_SYSVIPC_SYSCALLS
(disabled for mips-o32) to make this decision.

Fix this by switching the o32 ABI entries for semctl, shmctl and msgctl
to use the old-style handlers, matching the behavior of other
architectures and fixing compatibility with uClibc-ng.

Signed-off-by: Ism Hong <ism.hong@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Ism Hong 2025-01-06 19:52:27 +08:00 committed by Thomas Bogendoerfer
parent 42a39e4aa5
commit bc7584e009
1 changed files with 3 additions and 3 deletions
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6
arch/mips/kernel/syscalls/syscall_o32.tbl
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@ -382,15 +382,15 @@
368 o32 io_pgetevents sys_io_pgetevents_time32 compat_sys_io_pgetevents
# room for arch specific calls
393 o32 semget sys_semget
394 o32 semctl sys_semctl compat_sys_semctl
394 o32 semctl sys_old_semctl compat_sys_old_semctl
395 o32 shmget sys_shmget
396 o32 shmctl sys_shmctl compat_sys_shmctl
396 o32 shmctl sys_old_shmctl compat_sys_old_shmctl
397 o32 shmat sys_shmat compat_sys_shmat
398 o32 shmdt sys_shmdt
399 o32 msgget sys_msgget
400 o32 msgsnd sys_msgsnd compat_sys_msgsnd
401 o32 msgrcv sys_msgrcv compat_sys_msgrcv
402 o32 msgctl sys_msgctl compat_sys_msgctl
402 o32 msgctl sys_old_msgctl compat_sys_old_msgctl
403 o32 clock_gettime64 sys_clock_gettime sys_clock_gettime
404 o32 clock_settime64 sys_clock_settime sys_clock_settime
405 o32 clock_adjtime64 sys_clock_adjtime sys_clock_adjtime