aboutsummaryrefslogtreecommitdiffstats
path: root/ChangeLog
diff options
context:
space:
mode:
authorDmitry V. Levin <ldv@altlinux.org>2015-12-27 16:30:02 +0000
committerDmitry V. Levin <ldv@altlinux.org>2015-12-31 00:17:48 +0000
commite0043e17dfc52fe1702746543127cb4a87232bcd (patch)
tree73e7287e78b9775e8a4c603136fbf6c6fa1a5451 /ChangeLog
parentcc42170ef6ca931c7527a86f14fc66059b6dfff4 (diff)
downloadtermbaud-e0043e17dfc52fe1702746543127cb4a87232bcd.tar.gz
termbaud-e0043e17dfc52fe1702746543127cb4a87232bcd.tar.xz
termbaud-e0043e17dfc52fe1702746543127cb4a87232bcd.zip
Fix linux personality syscall wrapper
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 [$(subdir) == misc] (sysdep_routines): Add personality. (tests): Add tst-personality. * sysdeps/unix/sysv/linux/syscalls.list (personality): Move ... * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: ... here. * sysdeps/unix/sysv/linux/arm/syscalls.list (personality): New entry. * sysdeps/unix/sysv/linux/hppa/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/i386/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/m68k/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/microblaze/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/sh/syscalls.list (personality): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/syscalls.list (personality): Likewise.
Diffstat (limited to 'ChangeLog')
-rw-r--r--ChangeLog25
1 files changed, 25 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 85d39d61079..51a055c825f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,28 @@
+2015-12-30 Dmitry V. Levin <ldv@altlinux.org>
+
+ [BZ #19408]
+ * sysdeps/unix/sysv/linux/personality.c: New file.
+ * sysdeps/unix/sysv/linux/sparc/sparc64/personality.c: Likewise.
+ * sysdeps/unix/sysv/linux/tst-personality.c: Likewise.
+ * sysdeps/unix/sysv/linux/Makefile [$(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.
+
2015-12-30 Aurelien Jarno <aurelien@aurel32.net>
* sysdeps/unix/sysv/linux/arm/ioperm.c: Do not include <string.h>.