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* [Bug libgcc/60247] New: AVR ATxmega C++ constructor startup in libgcc.S causes boot loop
@ 2014-02-17 20:50 bobf at mrp3 dot com
2014-02-27 0:38 ` [Bug libgcc/60247] " bobf at mrp3 dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: bobf at mrp3 dot com @ 2014-02-17 20:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60247
Bug ID: 60247
Summary: AVR ATxmega C++ constructor startup in libgcc.S causes
boot loop
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: bobf at mrp3 dot com
CC: bobf at mrp3 dot com
Host: FreeBSD 8.x
Target: ATxmega processor
Build: avr-gcc port under FreeBSD
Created attachment 32156
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32156&action=edit
a patch file that corrects the problem
In the AVR implementation of GCC, when compiling for an ATXmega processor, the
C++ constructor calls from the startup code in libgcc.S does not preserve
registers before calling constructors. This usually results in a 'boot loop'
in which the processor continuously reboots due to un-handled faults.
gcc info:
COLLECT_GCC=avr-gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/avr/4.5.1/lto-wrapper
Target: avr
Configured with: ./../gcc-4.5.1/configure --target=avr --disable-libssp
--with-gmp=/usr/local --prefix=/usr/local --mandir=/usr/local/man
--infodir=/usr/local/info/ --build=x86_64-portbld-freebsd8.4
Thread model: single
gcc version 4.5.1 (GCC)
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libgcc/60247] AVR ATxmega C++ constructor startup in libgcc.S causes boot loop
2014-02-17 20:50 [Bug libgcc/60247] New: AVR ATxmega C++ constructor startup in libgcc.S causes boot loop bobf at mrp3 dot com
@ 2014-02-27 0:38 ` bobf at mrp3 dot com
2014-03-31 19:07 ` [Bug target/60247] " bobf at mrp3 dot com
2014-03-31 20:09 ` gjl at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: bobf at mrp3 dot com @ 2014-02-27 0:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60247
bobf at mrp3 dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |http://gcc.gnu.org/bugzilla
| |/show_bug.cgi?id=45263
--- Comment #1 from bobf at mrp3 dot com ---
bug 45263 may be related (and has been resolved). Preserving registers may
still be necessary, however, depending on what happens inside the constructors.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/60247] AVR ATxmega C++ constructor startup in libgcc.S causes boot loop
2014-02-17 20:50 [Bug libgcc/60247] New: AVR ATxmega C++ constructor startup in libgcc.S causes boot loop bobf at mrp3 dot com
2014-02-27 0:38 ` [Bug libgcc/60247] " bobf at mrp3 dot com
@ 2014-03-31 19:07 ` bobf at mrp3 dot com
2014-03-31 20:09 ` gjl at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: bobf at mrp3 dot com @ 2014-03-31 19:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60247
--- Comment #3 from bobf at mrp3 dot com ---
> --- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
> Are you sure this is not already fixed by PR45263? Or in version 4.7 and
> newer?
it might be - I saw something in the ubuntu libc package [after filing
this] that suggests that a fix may have been applied to later versions
[I think I added a reference to this for the PR, and if not I should
have after I discovered it].
> 4.7 is the oldest supported release series. 4.5 is no more supported.
it's currently being used in the FreeBSD ports system, though. Thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/60247] AVR ATxmega C++ constructor startup in libgcc.S causes boot loop
2014-02-17 20:50 [Bug libgcc/60247] New: AVR ATxmega C++ constructor startup in libgcc.S causes boot loop bobf at mrp3 dot com
2014-02-27 0:38 ` [Bug libgcc/60247] " bobf at mrp3 dot com
2014-03-31 19:07 ` [Bug target/60247] " bobf at mrp3 dot com
@ 2014-03-31 20:09 ` gjl at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: gjl at gcc dot gnu.org @ 2014-03-31 20:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60247
Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to bobf from comment #3)
>> 4.7 is the oldest supported release series. 4.5 is no more supported.
>
> it's currently being used in the FreeBSD ports system, though. Thanks.
If you want it in 4.5.1, you must suport your own gcc 4.5 and backport whatever
you like, e.g. for this one: r187058 which is the backport of PR45263 to 4.5.4.
Thus, you can also upgrade to 4.5.4 (or 4.6.1 or newer).
*** This bug has been marked as a duplicate of bug 45263 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-03-31 20:09 UTC | newest]
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2014-02-17 20:50 [Bug libgcc/60247] New: AVR ATxmega C++ constructor startup in libgcc.S causes boot loop bobf at mrp3 dot com
2014-02-27 0:38 ` [Bug libgcc/60247] " bobf at mrp3 dot com
2014-03-31 19:07 ` [Bug target/60247] " bobf at mrp3 dot com
2014-03-31 20:09 ` gjl at gcc dot gnu.org
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