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The personality system call, starting with linux kernel commit v2.6.29-6609-g11d06b2a1e5658f448a308aa3beb97bacd64a940, always successfully changes the personality if requested. The syscall wrapper, however, still can return an error in the following cases: - the value returned by the system call looks like an error due to architecture limitations of 32-bit kernels; - a personality greater than 0xffffffff is passed to the system call, and the 64-bit kernel does not have commit v2.6.35-rc1-372-g485d527686850d68a0e9006dd9904f19f122485e that would truncate this value to unsigned int; - on sparc64, the value returned by the system call looks like an error due to sparc64 kernel sign extension bug. The solution is three-fold: - move generic syscalls.list personality entry to generic 64-bit syscalls.list file; - for each 32-bit architecture that use negated errno semantics, add a NOERRNO personality entry to their syscalls.list file; - for sparc64 and 32-bit architectures that use dedicated registers to flag syscall errors, add a wrapper around personality syscall; if the system call return value is flagged as an error, this wrapper returns the negated "would be errno" value, otherwise it returns the system call return value; on sparc64, it also truncates the personality argument to unsigned int before passing it to the kernel. [BZ #19408] * sysdeps/unix/sysv/linux/personality.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/personality.c: Likewise. * sysdeps/unix/sysv/linux/tst-personality.c: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir) == misc] (sysdep_routines): Add personality. (tests): Add tst-personality. * sysdeps/unix/sysv/linux/syscalls.list (personality): Move ... * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: ... here. * sysdeps/unix/sysv/linux/arm/syscalls.list (personality): New entry. * sysdeps/unix/sysv/linux/hppa/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/i386/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/m68k/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/microblaze/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/sh/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/syscalls.list (personality): Likewise.
41 lines
1.8 KiB
Plaintext
41 lines
1.8 KiB
Plaintext
# File name Caller Syscall name # args Strong name Weak names
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# semaphore and shm system calls
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msgctl - msgctl i:iip __msgctl msgctl
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msgget - msgget i:ii __msgget msgget
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msgrcv - msgrcv Ci:ibnii __msgrcv msgrcv
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msgsnd - msgsnd Ci:ibni __msgsnd msgsnd
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shmat - shmat i:ipi __shmat shmat
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shmctl - shmctl i:iip __shmctl shmctl
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shmdt - shmdt i:s __shmdt shmdt
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shmget - shmget i:iii __shmget shmget
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semop - semop i:ipi __semop semop
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semtimedop - semtimedop i:ipip semtimedop
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semget - semget i:iii __semget semget
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semctl - semctl i:iiii __semctl semctl
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# proper socket implementations:
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accept - accept Ci:iBN __libc_accept __accept accept
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bind - bind i:ipi __bind bind
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connect - connect Ci:ipi __libc_connect __connect connect
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getpeername - getpeername i:ipp __getpeername getpeername
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getsockname - getsockname i:ipp __getsockname getsockname
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getsockopt - getsockopt i:iiiBN __getsockopt getsockopt
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listen - listen i:ii __listen listen
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recv - recv Ci:ibni __libc_recv __recv recv
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recvfrom - recvfrom Ci:ibniBN __libc_recvfrom __recvfrom recvfrom
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recvmsg - recvmsg Ci:ipi __libc_recvmsg __recvmsg recvmsg
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send - send Ci:ibni __libc_send __send send
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sendmsg - sendmsg Ci:ipi __libc_sendmsg __sendmsg sendmsg
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sendto - sendto Ci:ibnibn __libc_sendto __sendto sendto
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setsockopt - setsockopt i:iiibn __setsockopt setsockopt
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shutdown - shutdown i:ii __shutdown shutdown
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socket - socket i:iii __socket socket
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socketpair - socketpair i:iiif __socketpair socketpair
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setrlimit - setrlimit i:ip __setrlimit setrlimit
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getrlimit - getrlimit i:ip __getrlimit getrlimit
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prlimit64 EXTRA prlimit64 i:iipp __prlimit64 prlimit64@@GLIBC_2.17
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fanotify_mark EXTRA fanotify_mark i:iiiiis __fanotify_mark fanotify_mark@@GLIBC_2.19
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personality EXTRA personality Ei:i __personality personality
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