Re: dmsetup fails on latest kernel
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On 01/19/2012 10:06 AM, Bryn M. Reeves wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 01/19/2012 04:10 PM, Kasatkin, Dmitry wrote:It seems "semget" is missing from: arch/x86/syscalls/syscall_32.tbl But it presents in: arch/x86/syscalls/syscall_64.tbl Is it a bug then?Maybe; I noticed that too but it's also missing in the old x86 unistd_32.h. I thought Linux only provided the ipc(2) call - glibc sources seem to confirm that (sysdeps/unix/sysv/linux/semget.c). sys_sem* and friends are present in include/asm-generic/unistd.h so maybe these values just need to be propagated to syscall_32.tbl? Actually there's a bunch of SysV IPC calls defined in syscall_64.tbl that are not present in syscall_32.tbl: $ egrep 'shm|sem|msg[a-z]' arch/x86/syscalls/syscall_32.tbl $ egrep 'shm|sem|msg[a-z]' arch/x86/syscalls/syscall_64.tbl 29 64 shmget sys_shmget 30 64 shmat sys_shmat 31 64 shmctl sys_shmctl 64 64 semget sys_semget 65 64 semop sys_semop 66 64 semctl sys_semctl 67 64 shmdt sys_shmdt 68 64 msgget sys_msgget 69 64 msgsnd sys_msgsnd 70 64 msgrcv sys_msgrcv 71 64 msgctl sys_msgctl 220 64 semtimedop sys_semtimedop But sys_ipc is there: $ grep sys_ipc arch/x86/syscalls/syscall_32.tbl 117 i386 ipc sys_ipc sys32_ipc
No, the i386 ABI uses several system call multiplexes (sys_ipc, sys_socketcall) which are deprecated for new ABIs. x86-64 and other new ABIs use plain system calls. Thus, this is all as one should expect; the right thing to do is to compare against the old 32-bit system call table.
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