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[Bug 1791763] Re: broken signal handling in nios2 user-mode emulation
From: |
Thomas Huth |
Subject: |
[Bug 1791763] Re: broken signal handling in nios2 user-mode emulation |
Date: |
Fri, 13 Nov 2020 15:48:38 -0000 |
The QEMU project is currently considering to move its bug tracking to another
system. For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state
back to "New" within the next 60 days, otherwise this report will be marked as
"Expired". Or mark it as "Fix Released" if the problem has been solved with a
newer version of QEMU already. Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1791763
Title:
broken signal handling in nios2 user-mode emulation
Status in QEMU:
Incomplete
Bug description:
This bug is against the 3.0 release.
It appears that the signal handling parts of the nios2 user-mode
emulation have never really been completed or tested. Some examples
of failing tests from the GCC testsuite are gcc.dg/pr78185.c and
gcc.dg/cleanup-10.c.
Some problems I've identified and tried to fix with the attached patch
are:
- Code copied from the Linux kernel wasn't adjusted to differentiate
between host and target data types and address spaces.
- The sigaltstack() system call returns EINVAL because fields are
listed in the wrong order in struct target_sigaltstack.
With this patch, the system calls to set up the signal handler are
returning successfully, but the handler isn't being invoked, so
something is still wrong. I think I need another pair of eyes to look
over this code.
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- [Bug 1791763] Re: broken signal handling in nios2 user-mode emulation,
Thomas Huth <=