Bug 1528418
Summary: | glibc: Merge error in XSAVE dynamic linker trampoline patch | ||
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Product: | Red Hat Enterprise Linux 7 | Reporter: | Florian Weimer <fweimer> |
Component: | glibc | Assignee: | Carlos O'Donell <codonell> |
Status: | CLOSED ERRATA | QA Contact: | Sergey Kolosov <skolosov> |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | 7.5 | CC: | ashankar, bgollahe, codonell, fweimer, lmiksik, mnewsome, pfrankli, skolosov |
Target Milestone: | rc | ||
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | glibc-2.17-221.el7 | Doc Type: | Bug Fix |
Doc Text: |
Previously, the dynamic loader in the GNU C library (glibc) contained an optimization which avoided saving and restoring vector registers for 64-bit Intel and AMD architectures. Consequently, applications compiled for these architectures and using unsupported vector registers for passing function arguments, not adhering to the published x86-64 psABI specification, could fail and produce unexpected results. This update changes the dynamic loader to use the XSAVE/XSAVEC context switch CPU instructions, preserving more CPU state, including all vector registers. As a result, applications using vector registers for argument passing, in ways which are not supported by the x86-64 psABI specification, work again.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2018-04-10 14:04:32 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Florian Weimer
2017-12-21 19:44:31 UTC
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2018:0805 |