* [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures
@ 2017-07-18 20:34 Bruno Haible
2017-07-18 20:34 ` [Qemu-devel] [Bug 1705118] " Bruno Haible
` (16 more replies)
0 siblings, 17 replies; 18+ messages in thread
From: Bruno Haible @ 2017-07-18 20:34 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
** Affects: qemu
Importance: Undecided
Status: New
** Attachment added: "source code of test program"
https://bugs.launchpad.net/bugs/1705118/+attachment/4917116/+files/testsigsegv.c
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https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
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^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
@ 2017-07-18 20:34 ` Bruno Haible
2017-07-18 20:35 ` Bruno Haible
` (15 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-07-18 20:34 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "Statically compiled test program for ppc"
https://bugs.launchpad.net/qemu/+bug/1705118/+attachment/4917117/+files/testsigsegv-ppc
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
2017-07-18 20:34 ` [Qemu-devel] [Bug 1705118] " Bruno Haible
@ 2017-07-18 20:35 ` Bruno Haible
2017-07-18 20:35 ` Bruno Haible
` (14 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-07-18 20:35 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "Statically compiled test program for ppc64"
https://bugs.launchpad.net/qemu/+bug/1705118/+attachment/4917118/+files/testsigsegv-ppc64
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
2017-07-18 20:34 ` [Qemu-devel] [Bug 1705118] " Bruno Haible
2017-07-18 20:35 ` Bruno Haible
@ 2017-07-18 20:35 ` Bruno Haible
2017-07-18 20:36 ` Bruno Haible
` (13 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-07-18 20:35 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "Statically compiled test program for ppc64le"
https://bugs.launchpad.net/qemu/+bug/1705118/+attachment/4917119/+files/testsigsegv-ppc64le
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (2 preceding siblings ...)
2017-07-18 20:35 ` Bruno Haible
@ 2017-07-18 20:36 ` Bruno Haible
2017-07-18 20:36 ` Bruno Haible
` (12 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-07-18 20:36 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "Statically compiled test program for s390x"
https://bugs.launchpad.net/qemu/+bug/1705118/+attachment/4917120/+files/testsigsegv-s390x
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (3 preceding siblings ...)
2017-07-18 20:36 ` Bruno Haible
@ 2017-07-18 20:36 ` Bruno Haible
2017-08-31 22:10 ` Bruno Haible
` (11 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-07-18 20:36 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "Statically compiled test program for sparc64"
https://bugs.launchpad.net/qemu/+bug/1705118/+attachment/4917121/+files/testsigsegv-sparc64
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (4 preceding siblings ...)
2017-07-18 20:36 ` Bruno Haible
@ 2017-08-31 22:10 ` Bruno Haible
2017-11-06 15:14 ` Peter Maydell
` (10 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-08-31 22:10 UTC (permalink / raw)
To: qemu-devel
The behaviour in qemu-2.10 is the same as in qemu-2.9.
--
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https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
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^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (5 preceding siblings ...)
2017-08-31 22:10 ` Bruno Haible
@ 2017-11-06 15:14 ` Peter Maydell
2017-11-06 17:33 ` Peter Maydell
` (9 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Peter Maydell @ 2017-11-06 15:14 UTC (permalink / raw)
To: qemu-devel
** Tags added: linux-user
--
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devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
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^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (6 preceding siblings ...)
2017-11-06 15:14 ` Peter Maydell
@ 2017-11-06 17:33 ` Peter Maydell
2017-11-06 17:53 ` Peter Maydell
` (8 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Peter Maydell @ 2017-11-06 17:33 UTC (permalink / raw)
To: qemu-devel
This is an interesting collection of different bugs:
* s390x is missing masking operations, as you describe
* ppc is passing the PC of the offending insn, not the data address, into si_addr
* sparc fails to record the address of a data fault and so passes 0 into si_addr
* sparc also isn't implementing rt_sigaction correctly and so the calls in your test program fail EINVAL (your test program doesn't check the return value from sigaction, so it ploughs ahead and makes the faulting data access with the SIG_DFL behaviour for SEGV, hence the uncaught SEGV).
I'm putting together some patches for these.
** Changed in: qemu
Status: New => Confirmed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
Confirmed
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (7 preceding siblings ...)
2017-11-06 17:33 ` Peter Maydell
@ 2017-11-06 17:53 ` Peter Maydell
2017-11-06 19:01 ` Peter Maydell
` (7 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Peter Maydell @ 2017-11-06 17:53 UTC (permalink / raw)
To: qemu-devel
...and also
* SPARC doesn't implement setup_rt_frame(), so it can't deliver RT signals at all.
That's a bigger missing feature than the rest.
--
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devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
Confirmed
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (8 preceding siblings ...)
2017-11-06 17:53 ` Peter Maydell
@ 2017-11-06 19:01 ` Peter Maydell
2017-12-15 6:33 ` Bruno Haible
` (6 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Peter Maydell @ 2017-11-06 19:01 UTC (permalink / raw)
To: qemu-devel
Patchset that fixes all the minor parts of this, leaving (probably) just sparc setup_rt_frame/rt_sigreturn:
https://lists.gnu.org/archive/html/qemu-devel/2017-11/msg00833.html
--
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devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
Confirmed
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
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^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (9 preceding siblings ...)
2017-11-06 19:01 ` Peter Maydell
@ 2017-12-15 6:33 ` Bruno Haible
2017-12-15 15:08 ` Peter Maydell
` (5 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2017-12-15 6:33 UTC (permalink / raw)
To: qemu-devel
I confirm that in qemu-2.11, the ppc and s390x cases are fixed, however
the sparc64 case is still failing:
$ ~/inst-qemu/2.11.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
0
$ ~/inst-qemu/2.11.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
0
$ ~/inst-qemu/2.11.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
0
$ ~/inst-qemu/2.11.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
0
$ ~/inst-qemu/2.11.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
3
$ ~/inst-qemu/2.11.0/bin/qemu-sparc64 testsigsegv-sparc64
setup_rt_frame: not implemented
Segmentation fault (core dumped)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode does not support catching SIGSEGV on some architectures
Status in QEMU:
Confirmed
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
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^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [Bug 1705118] Re: qemu user mode does not support catching SIGSEGV on some architectures
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (10 preceding siblings ...)
2017-12-15 6:33 ` Bruno Haible
@ 2017-12-15 15:08 ` Peter Maydell
2021-05-11 5:15 ` [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests Thomas Huth
` (4 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Peter Maydell @ 2017-12-15 15:08 UTC (permalink / raw)
To: qemu-devel
I don't suppose anybody's going to get round to implementing RT signals
for SPARC any time soon, so let's retitle this bug to track the one
remaining issue.
** Summary changed:
- qemu user mode does not support catching SIGSEGV on some architectures
+ qemu user mode: rt signals not implemented for sparc guests
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode: rt signals not implemented for sparc guests
Status in QEMU:
Confirmed
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (11 preceding siblings ...)
2017-12-15 15:08 ` Peter Maydell
@ 2021-05-11 5:15 ` Thomas Huth
2021-05-14 19:50 ` Bruno Haible
` (3 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Thomas Huth @ 2021-05-11 5:15 UTC (permalink / raw)
To: qemu-devel
The QEMU project is currently moving 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 the bug state to "Incomplete" now.
If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".
If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:
1) If you already have an account on gitlab.com, please open a new ticket
for this problem in our new tracker here:
https://gitlab.com/qemu-project/qemu/-/issues
and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.
2) If you don't have an account on gitlab.com and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" or "Confirmed" within the next 60 days (other-
wise it will get closed as "Expired"). We will then eventually migrate
the ticket automatically to the new system (but you won't be the reporter
of the bug in the new system and thus you won't get notified on changes
anymore).
Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: Confirmed => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode: rt signals not implemented for sparc guests
Status in QEMU:
Incomplete
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (12 preceding siblings ...)
2021-05-11 5:15 ` [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests Thomas Huth
@ 2021-05-14 19:50 ` Bruno Haible
2021-05-15 10:52 ` Thomas Huth
` (2 subsequent siblings)
16 siblings, 0 replies; 18+ messages in thread
From: Bruno Haible @ 2021-05-14 19:50 UTC (permalink / raw)
To: qemu-devel
The situation in version 6.0.0 is the same as in version 2.11.0: The
cases ppc, ppc64, ppc64le, s390x are fixed, but the sparc64 executable
still crashes.
** Changed in: qemu
Status: Incomplete => New
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode: rt signals not implemented for sparc guests
Status in QEMU:
New
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (13 preceding siblings ...)
2021-05-14 19:50 ` Bruno Haible
@ 2021-05-15 10:52 ` Thomas Huth
2021-06-23 17:33 ` Richard Henderson
2021-08-25 7:26 ` Thomas Huth
16 siblings, 0 replies; 18+ messages in thread
From: Thomas Huth @ 2021-05-15 10:52 UTC (permalink / raw)
To: qemu-devel
This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:
https://gitlab.com/qemu-project/qemu/-/issues/311
** Changed in: qemu
Status: New => Expired
** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #311
https://gitlab.com/qemu-project/qemu/-/issues/311
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode: rt signals not implemented for sparc guests
Status in QEMU:
Expired
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (14 preceding siblings ...)
2021-05-15 10:52 ` Thomas Huth
@ 2021-06-23 17:33 ` Richard Henderson
2021-08-25 7:26 ` Thomas Huth
16 siblings, 0 replies; 18+ messages in thread
From: Richard Henderson @ 2021-06-23 17:33 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: Expired => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode: rt signals not implemented for sparc guests
Status in QEMU:
Fix Committed
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
` (15 preceding siblings ...)
2021-06-23 17:33 ` Richard Henderson
@ 2021-08-25 7:26 ` Thomas Huth
16 siblings, 0 replies; 18+ messages in thread
From: Thomas Huth @ 2021-08-25 7:26 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1705118
Title:
qemu user mode: rt signals not implemented for sparc guests
Status in QEMU:
Fix Released
Bug description:
The documentation
<https://qemu.weilnetz.de/doc/qemu-doc.html#Features> says that
qemu in user mode supports POSIX signal handling.
Catching SIGSEGV according to POSIX, however, does not work on
ppc, ppc64, ppc64le, s390x, sparc64.
It does work, however, on
aarch64, alpha, arm, hppa, m68k, mips, mips64, sh4.
How to reproduce:
The attached program runs fine (exits with code 0) on
- real hardware Linux/PowerPC64 (in 32-bit and 64-bit mode),
- real hardware Linux/PowerPC64LE,
- qemu-system-s390x emulated Linux/s390x,
- real hardware Linux/SPARC64.
$ gcc -O -Wall testsigsegv.c; ./a.out; echo $?
0
For ppc:
$ powerpc-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc
$ ~/inst-qemu/2.9.0/bin/qemu-ppc testsigsegv-ppc
$ echo $?
3
For ppc64:
$ powerpc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64 testsigsegv-ppc64
$ echo $?
3
For ppc64le:
$ powerpc64le-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-ppc64le
$ ~/inst-qemu/2.9.0/bin/qemu-ppc64le testsigsegv-ppc64le
$ echo $?
3
For s390x:
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-s390x
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x
$ echo $?
3
$ s390x-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -DAVOID_LINUX_S390X_COMPAT -o testsigsegv-s390x-a
$ ~/inst-qemu/2.9.0/bin/qemu-s390x testsigsegv-s390x-a
$ echo $?
0
So, the test fails here because the Linux/s390x kernel omits the least
significant 12 bits of the fault address in the 'si_addr' field. But
qemu-s390x is not compatible with the Linux/s390x behaviour: it puts
the complete fault address in the 'si_addr' field.
For sparc64:
$ sparc64-linux-gnu-gcc-5 -O -Wall -static testsigsegv.c -o testsigsegv-sparc64
$ ~/inst-qemu/2.9.0/bin/qemu-sparc64 testsigsegv-sparc64
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1705118/+subscriptions
^ permalink raw reply [flat|nested] 18+ messages in thread
end of thread, other threads:[~2021-08-25 7:36 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-07-18 20:34 [Qemu-devel] [Bug 1705118] [NEW] qemu user mode does not support catching SIGSEGV on some architectures Bruno Haible
2017-07-18 20:34 ` [Qemu-devel] [Bug 1705118] " Bruno Haible
2017-07-18 20:35 ` Bruno Haible
2017-07-18 20:35 ` Bruno Haible
2017-07-18 20:36 ` Bruno Haible
2017-07-18 20:36 ` Bruno Haible
2017-08-31 22:10 ` Bruno Haible
2017-11-06 15:14 ` Peter Maydell
2017-11-06 17:33 ` Peter Maydell
2017-11-06 17:53 ` Peter Maydell
2017-11-06 19:01 ` Peter Maydell
2017-12-15 6:33 ` Bruno Haible
2017-12-15 15:08 ` Peter Maydell
2021-05-11 5:15 ` [Bug 1705118] Re: qemu user mode: rt signals not implemented for sparc guests Thomas Huth
2021-05-14 19:50 ` Bruno Haible
2021-05-15 10:52 ` Thomas Huth
2021-06-23 17:33 ` Richard Henderson
2021-08-25 7:26 ` Thomas Huth
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