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AArch64: Fix handling of nocancel syscall failures (#1098327)

This commit is contained in:
Kyle McMartin 2014-05-21 15:34:20 -04:00
parent 25cc20651e
commit abfaca544c
2 changed files with 36 additions and 2 deletions
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30
glibc-aarch64-fix-handling-of-nocancel-syscall-failures.patch Normal file
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@ -0,0 +1,30 @@
commit a60339aaff82beadea6f580e587d64052cb5e3b8
Author: Will Newton <will.newton@linaro.org>
Date: Mon May 19 14:38:30 2014 +0100
AArch64: Fix handling of nocancel syscall failures
The current code for nocancel syscalls does not do a comparison of
the system call return value. This leads to code being generated
where the b.cs follows the svc instruction directly without setting
the flags on which the branch depends.
ChangeLog:
2014-05-20 Will Newton <will.newton@linaro.org>
* sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h (PSEUDO):
Test the return value of the system call in the nocancel case.
diff --git a/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h b/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
index f6903b5..0e9bef3 100644
--- a/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
@@ -32,6 +32,7 @@
__##syscall_name##_nocancel: \
cfi_startproc; \
DO_CALL (syscall_name, args); \
+ cmn x0, 4095; \
PSEUDO_RET; \
cfi_endproc; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \

8
glibc.spec
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@ -1,6 +1,6 @@
%define glibcsrcdir glibc-2.19-418-ga5d87b3
%define glibcversion 2.19.90
%define glibcrelease 15%{?dist}
%define glibcrelease 16%{?dist}
# Pre-release tarballs are pulled in from git using a command that is
# effectively:
#
@ -191,7 +191,7 @@ Patch0047: %{name}-nscd-sysconfig.patch
#
##############################################################################
# None!
Patch1000: %{name}-aarch64-fix-handling-of-nocancel-syscall-failures.patch
##############################################################################
#
@ -553,6 +553,7 @@ package or when debugging this package.
%patch2031 -p1
%patch0047 -p1
%patch2032 -p1
%patch1000 -p1
##############################################################################
# %%prep - Additional prep required...
@ -1642,6 +1643,9 @@ rm -f *.filelist*
%endif
%changelog
* Wed May 21 2014 Kyle McMartin <kyle@fedoraproject.org> - 2.19.90-16
- AArch64: Fix handling of nocancel syscall failures (#1098327)
* Thu May 15 2014 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.19.90-15
- Sync with upstream master.