mirror of git://sourceware.org/git/glibc.git
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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| .. | ||
| Versions | ||
| aio_read.c | ||
| aio_read64.c | ||
| aio_write.c | ||
| aio_write64.c | ||
| creat64.c | ||
| dl-fxstatat64.c | ||
| fallocate.c | ||
| fallocate64.c | ||
| fstatfs64.c | ||
| fstatvfs.c | ||
| fstatvfs64.c | ||
| ftruncate64.c | ||
| fxstat.c | ||
| fxstat64.c | ||
| fxstatat.c | ||
| fxstatat64.c | ||
| getdents.c | ||
| getdents64.c | ||
| getdirentries.c | ||
| getdirentries64.c | ||
| getrlimit64.c | ||
| glob64.c | ||
| internal_statvfs64.c | ||
| lio_listio.c | ||
| lio_listio64.c | ||
| lxstat.c | ||
| lxstat64.c | ||
| mmap.c | ||
| mmap64.c | ||
| open64.c | ||
| openat.c | ||
| openat64.c | ||
| posix_fadvise.c | ||
| posix_fadvise64.c | ||
| posix_fallocate.c | ||
| posix_fallocate64.c | ||
| pread64.c | ||
| preadv.c | ||
| preadv64.c | ||
| pwrite64.c | ||
| pwritev.c | ||
| pwritev64.c | ||
| readdir.c | ||
| readdir64.c | ||
| readdir64_r.c | ||
| readdir_r.c | ||
| sendfile64.c | ||
| setrlimit64.c | ||
| statfs64.c | ||
| statvfs.c | ||
| statvfs64.c | ||
| syscalls.list | ||
| truncate64.c | ||
| xstat.c | ||
| xstat64.c | ||