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e0043e17df
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. |
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| .. | ||
| bits | ||
| sh3 | ||
| sh4 | ||
| sys | ||
| ____longjmp_chk.S | ||
| arch-fork.h | ||
| atomic-machine.h | ||
| brk.c | ||
| c++-types.data | ||
| clone.S | ||
| configure | ||
| configure.ac | ||
| fcntl.c | ||
| fxstat.c | ||
| fxstatat.c | ||
| getrlimit64.c | ||
| Implies | ||
| kernel-features.h | ||
| ld.abilist | ||
| libanl.abilist | ||
| libBrokenLocale.abilist | ||
| libc.abilist | ||
| libcrypt.abilist | ||
| libdl.abilist | ||
| libm.abilist | ||
| libnsl.abilist | ||
| libpthread.abilist | ||
| libresolv.abilist | ||
| librt.abilist | ||
| libthread_db.abilist | ||
| libutil.abilist | ||
| lockf64.c | ||
| lowlevel-atomic.h | ||
| lxstat.c | ||
| makecontext.S | ||
| Makefile | ||
| pipe.S | ||
| pread64.c | ||
| pread.c | ||
| profil-counter.h | ||
| pt-vfork.S | ||
| pwrite64.c | ||
| pwrite.c | ||
| setegid.c | ||
| seteuid.c | ||
| setgid.c | ||
| setgroups.c | ||
| setregid.c | ||
| setresgid.c | ||
| setresuid.c | ||
| setreuid.c | ||
| setuid.c | ||
| shlib-versions | ||
| sigaltstack-offsets.sym | ||
| sigcontextinfo.h | ||
| smp.h | ||
| syscall.S | ||
| syscalls.list | ||
| sysdep-cancel.h | ||
| sysdep.h | ||
| sysdep.S | ||
| Versions | ||
| vfork.S | ||
| xstat.c | ||