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Bug 1081226 - Trivial change to systemtap spec to enable ppc64le
Summary: Trivial change to systemtap spec to enable ppc64le
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: systemtap
Version: rawhide
Hardware: ppc64le
OS: Linux
unspecified
medium
Target Milestone: ---
Assignee: Frank Ch. Eigler
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: F-ExcludeArch-ppc64le, PPC64LETracker
TreeView+ depends on / blocked
 
Reported: 2014-03-26 19:38 UTC by Brent Baude
Modified: 2014-03-28 15:15 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-03-28 14:38:02 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Brent Baude 2014-03-26 19:38:06 UTC 
The following diff will enable ppc64le and systemtap builds:

[baude@ppc64le systemtap]$ git diff
diff --git a/systemtap.spec b/systemtap.spec
index 8570948..058d539 100644
--- a/systemtap.spec
+++ b/systemtap.spec
@@ -1,7 +1,7 @@
 %{!?with_sqlite: %global with_sqlite 1}
 %{!?with_docs: %global with_docs 1}
 # crash is not available
-%ifarch ppc ppc64 %{sparc} aarch64
+%ifarch ppc ppc64 %{sparc} aarch64 ppc64le
 %{!?with_crash: %global with_crash 0}
 %else
 %{!?with_crash: %global with_crash 1}
@@ -11,7 +11,7 @@
 %{!?elfutils_version: %global elfutils_version 0.142}
 %{!?pie_supported: %global pie_supported 1}
 %{!?with_boost: %global with_boost 0}
-%ifarch ppc ppc64 %{sparc} aarch64
+%ifarch ppc ppc64 %{sparc} aarch64 ppc64le
 %{!?with_publican: %global with_publican 0}
 %else
 %{!?with_publican: %global with_publican 1}
@@ -41,6 +41,10 @@
 %{!?with_openssl: %global with_openssl 0}
 %endif
 
+%ifarch ppc64le
+%global with_virthost 0
+%endif
+
 %if 0%{?fedora} >= 18 || 0%{?rhel} >= 6
    %define initdir %{_initddir}
 %else # RHEL5 doesn't know _initddir
Comment 1 Brent Baude 2014-03-26 20:04:54 UTC 
I missed one conditional.  Proper changes are below:

[baude@ppc64le systemtap]$ git diff
diff --git a/systemtap.spec b/systemtap.spec
index 8570948..66a5512 100644
--- a/systemtap.spec
+++ b/systemtap.spec
@@ -1,7 +1,7 @@
 %{!?with_sqlite: %global with_sqlite 1}
 %{!?with_docs: %global with_docs 1}
 # crash is not available
-%ifarch ppc ppc64 %{sparc} aarch64
+%ifarch ppc ppc64 %{sparc} aarch64 ppc64le
 %{!?with_crash: %global with_crash 0}
 %else
 %{!?with_crash: %global with_crash 1}
@@ -11,7 +11,7 @@
 %{!?elfutils_version: %global elfutils_version 0.142}
 %{!?pie_supported: %global pie_supported 1}
 %{!?with_boost: %global with_boost 0}
-%ifarch ppc ppc64 %{sparc} aarch64
+%ifarch ppc ppc64 %{sparc} aarch64 ppc64le
 %{!?with_publican: %global with_publican 0}
 %else
 %{!?with_publican: %global with_publican 1}
@@ -21,7 +21,7 @@
 %else
 %{!?publican_brand: %global publican_brand fedora}
 %endif
-%ifnarch s390 s390x %{arm} aarch64
+%ifnarch s390 s390x %{arm} aarch64 ppc64le
 %{!?with_dyninst: %global with_dyninst 0%{?fedora} >= 18 || 0%{?rhel} >= 7}
 %else
 %{!?with_dyninst: %global with_dyninst 0}
@@ -41,6 +41,10 @@
 %{!?with_openssl: %global with_openssl 0}
 %endif
 
+%ifarch ppc64le
+%global with_virthost 0
+%endif
+
 %if 0%{?fedora} >= 18 || 0%{?rhel} >= 6
    %define initdir %{_initddir}
 %else # RHEL5 doesn't know _initddir
Comment 2 David Smith 2014-03-27 20:37:29 UTC 
I'll note here that these changes are fine in themselves. But, even with the spec file changed so that it will build on ppc64le, I'm not sure it will build successfully. Assuming systemtap does builds successfully, I doubt it will work well on ppc64le. Each new arch requires porting in several areas, such as register support, user and kernel backtrace support, etc.

In addition, systemtap requires elfutils, and I don't see a ppc64le elfutils backend in the elfutils source tree.
Comment 3 Brent Baude 2014-03-28 13:50:26 UTC 
Please push the changes.  I'll review the comments and ensure it works properly.
Comment 4 Frank Ch. Eigler 2014-03-28 14:38:02 UTC 
pushed.
Comment 5 Mark Wielaard 2014-03-28 15:15:31 UTC 
(In reply to David Smith from comment #2)
> In addition, systemtap requires elfutils, and I don't see a ppc64le elfutils
> backend in the elfutils source tree.

That is correct, elfutils doesn't have a ppc64le ELFv2 ABI backend yet. It will recognize little endian ppc64 (because it checks e_ident EI_DATA_, but will treat it as ELFv1 ABI (because it doesn't check e_flags EF_PPC64_ABI), including assuming there are function descriptors used (which isn't the case with ppc64le ELFv2 ABI).
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