* [Bug runtime/27301] New: Aarch64 ko compilation failures when CONFIG_COMPAT is defined
@ 2021-02-01 1:31 agentzh at gmail dot com
2021-02-01 1:32 ` [Bug runtime/27301] " agentzh at gmail dot com
2021-02-01 4:20 ` agentzh at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2021-02-01 1:31 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27301
Bug ID: 27301
Summary: Aarch64 ko compilation failures when CONFIG_COMPAT is
defined
Product: systemtap
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: runtime
Assignee: systemtap at sourceware dot org
Reporter: agentzh at gmail dot com
Target Milestone: ---
When CONFIG_COMPAT is defined in the kernel's config, stap fails to compile its
runtime on Fedora 32 (kernel 5.10):
```
$ /opt/stap/bin/stap -e 'probe process.function("main") {
println(register("x0")) }' -c ./a.out
WARNING: cannot find module /home/agentzh/git/systemtap.new/a.out debuginfo: No
DWARF information found [man warning::debuginfo]
In file included from
/opt/stap/share/systemtap/runtime/linux/../linux/regs.c:16,
from /opt/stap/share/systemtap/runtime/linux/../regs.c:20,
from /opt/stap/share/systemtap/runtime/linux/runtime.h:251,
from /opt/stap/share/systemtap/runtime/runtime.h:26,
from
/tmp/stapLY6U32/stap_9b24fb2c80d42c5c58d165f9c20c403e_6889_src.c:21:
/opt/stap/share/systemtap/runtime/compatdefs.h: In function
‘_stp_is_compat_task2’:
/opt/stap/share/systemtap/runtime/compatdefs.h:38:2: error: #error architecture
not supported, no TIF_32BIT flag?
38 | #error architecture not supported, no TIF_32BIT flag?
| ^~~~~
/opt/stap/share/systemtap/runtime/compatdefs.h:40:1: error: no return statement
in function returning non-void [-Werror=return-type]
40 | }
| ^
cc1: all warnings being treated as errors
make[1]: *** [scripts/Makefile.build:279:
/tmp/stapLY6U32/stap_9b24fb2c80d42c5c58d165f9c20c403e_6889_src.o] Error 1
make: *** [Makefile:1806: /tmp/stapLY6U32] Error 2
WARNING: kbuild exited with status: 2
Pass 4: compilation failed. [man error::pass4]
```
That part of runtime code does not handle aarch64 at all. A fix is easy.
A patch is under way.
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* [Bug runtime/27301] Aarch64 ko compilation failures when CONFIG_COMPAT is defined
2021-02-01 1:31 [Bug runtime/27301] New: Aarch64 ko compilation failures when CONFIG_COMPAT is defined agentzh at gmail dot com
@ 2021-02-01 1:32 ` agentzh at gmail dot com
2021-02-01 4:20 ` agentzh at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2021-02-01 1:32 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27301
--- Comment #1 from agentzh <agentzh at gmail dot com> ---
BTW, any target C program with a main function will reproduce this.
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* [Bug runtime/27301] Aarch64 ko compilation failures when CONFIG_COMPAT is defined
2021-02-01 1:31 [Bug runtime/27301] New: Aarch64 ko compilation failures when CONFIG_COMPAT is defined agentzh at gmail dot com
2021-02-01 1:32 ` [Bug runtime/27301] " agentzh at gmail dot com
@ 2021-02-01 4:20 ` agentzh at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2021-02-01 4:20 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27301
agentzh <agentzh at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |NOTABUG
--- Comment #2 from agentzh <agentzh at gmail dot com> ---
Ah, William Cohen was faster than me. Closing this.
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2021-02-01 1:31 [Bug runtime/27301] New: Aarch64 ko compilation failures when CONFIG_COMPAT is defined agentzh at gmail dot com
2021-02-01 1:32 ` [Bug runtime/27301] " agentzh at gmail dot com
2021-02-01 4:20 ` agentzh at gmail dot com
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