* [PATCH 1/9] selftests: move dnotify_test from Documentation/filesystems
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-10 8:08 ` kbuild test robot
2016-09-09 22:22 ` [PATCH 2/9] selftests: update filesystems Makefile to work under selftests Shuah Khan
` (8 subsequent siblings)
9 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Move dnotify_test from Documentation/filesystems to selftests/filesystems
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
Documentation/filesystems/Makefile | 5 ----
Documentation/filesystems/dnotify_test.c | 34 ----------------------
tools/testing/selftests/filesystems/Makefile | 5 ++++
tools/testing/selftests/filesystems/dnotify_test.c | 34 ++++++++++++++++++++++
4 files changed, 39 insertions(+), 39 deletions(-)
delete mode 100644 Documentation/filesystems/Makefile
delete mode 100644 Documentation/filesystems/dnotify_test.c
create mode 100644 tools/testing/selftests/filesystems/Makefile
create mode 100644 tools/testing/selftests/filesystems/dnotify_test.c
diff --git a/Documentation/filesystems/Makefile b/Documentation/filesystems/Makefile
deleted file mode 100644
index 883010c..0000000
--- a/Documentation/filesystems/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-# List of programs to build
-hostprogs-y := dnotify_test
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
diff --git a/Documentation/filesystems/dnotify_test.c b/Documentation/filesystems/dnotify_test.c
deleted file mode 100644
index 8b37b4a..0000000
--- a/Documentation/filesystems/dnotify_test.c
+++ /dev/null
@@ -1,34 +0,0 @@
-#define _GNU_SOURCE /* needed to get the defines */
-#include <fcntl.h> /* in glibc 2.2 this has the needed
- values defined */
-#include <signal.h>
-#include <stdio.h>
-#include <unistd.h>
-
-static volatile int event_fd;
-
-static void handler(int sig, siginfo_t *si, void *data)
-{
- event_fd = si->si_fd;
-}
-
-int main(void)
-{
- struct sigaction act;
- int fd;
-
- act.sa_sigaction = handler;
- sigemptyset(&act.sa_mask);
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGRTMIN + 1, &act, NULL);
-
- fd = open(".", O_RDONLY);
- fcntl(fd, F_SETSIG, SIGRTMIN + 1);
- fcntl(fd, F_NOTIFY, DN_MODIFY|DN_CREATE|DN_MULTISHOT);
- /* we will now be notified if any of the files
- in "." is modified or new files are created */
- while (1) {
- pause();
- printf("Got event on fd=%d\n", event_fd);
- }
-}
diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
new file mode 100644
index 0000000..883010c
--- /dev/null
+++ b/tools/testing/selftests/filesystems/Makefile
@@ -0,0 +1,5 @@
+# List of programs to build
+hostprogs-y := dnotify_test
+
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
diff --git a/tools/testing/selftests/filesystems/dnotify_test.c b/tools/testing/selftests/filesystems/dnotify_test.c
new file mode 100644
index 0000000..8b37b4a
--- /dev/null
+++ b/tools/testing/selftests/filesystems/dnotify_test.c
@@ -0,0 +1,34 @@
+#define _GNU_SOURCE /* needed to get the defines */
+#include <fcntl.h> /* in glibc 2.2 this has the needed
+ values defined */
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static volatile int event_fd;
+
+static void handler(int sig, siginfo_t *si, void *data)
+{
+ event_fd = si->si_fd;
+}
+
+int main(void)
+{
+ struct sigaction act;
+ int fd;
+
+ act.sa_sigaction = handler;
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_SIGINFO;
+ sigaction(SIGRTMIN + 1, &act, NULL);
+
+ fd = open(".", O_RDONLY);
+ fcntl(fd, F_SETSIG, SIGRTMIN + 1);
+ fcntl(fd, F_NOTIFY, DN_MODIFY|DN_CREATE|DN_MULTISHOT);
+ /* we will now be notified if any of the files
+ in "." is modified or new files are created */
+ while (1) {
+ pause();
+ printf("Got event on fd=%d\n", event_fd);
+ }
+}
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* Re: [PATCH 1/9] selftests: move dnotify_test from Documentation/filesystems
2016-09-09 22:22 ` [PATCH 1/9] selftests: move dnotify_test from Documentation/filesystems Shuah Khan
@ 2016-09-10 8:08 ` kbuild test robot
0 siblings, 0 replies; 23+ messages in thread
From: kbuild test robot @ 2016-09-10 8:08 UTC (permalink / raw)
To: Shuah Khan
Cc: kbuild-all, corbet, richardcochran, Shuah Khan, linux-doc,
linux-kernel, netdev, linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 3277 bytes --]
Hi Shuah,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc5 next-20160909]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Shuah-Khan/Move-runnable-code-tests-from-Documentation-to-selftests/20160910-063538
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
>> scripts/Makefile.build:44: Documentation/filesystems/Makefile: No such file or directory
>> make[3]: *** No rule to make target 'Documentation/filesystems/Makefile'.
make[3]: Failed to remake makefile 'Documentation/filesystems/Makefile'.
vim +44 scripts/Makefile.build
f77bf0142 Sam Ravnborg 2007-10-15 28 ldflags-y :=
d72e5edbf Sam Ravnborg 2007-05-28 29
720097d89 Sam Ravnborg 2009-04-19 30 subdir-asflags-y :=
720097d89 Sam Ravnborg 2009-04-19 31 subdir-ccflags-y :=
720097d89 Sam Ravnborg 2009-04-19 32
3156fd052 Robert P. J. Day 2008-02-18 33 # Read auto.conf if it exists, otherwise ignore
c955ccafc Roman Zippel 2006-06-08 34 -include include/config/auto.conf
^1da177e4 Linus Torvalds 2005-04-16 35
20a468b51 Sam Ravnborg 2006-01-22 36 include scripts/Kbuild.include
20a468b51 Sam Ravnborg 2006-01-22 37
3156fd052 Robert P. J. Day 2008-02-18 38 # For backward compatibility check that these variables do not change
0c53c8e6e Sam Ravnborg 2007-10-14 39 save-cflags := $(CFLAGS)
0c53c8e6e Sam Ravnborg 2007-10-14 40
2a6914703 Sam Ravnborg 2005-07-25 41 # The filename Kbuild has precedence over Makefile
db8c1a7b2 Sam Ravnborg 2005-07-27 42 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
0c53c8e6e Sam Ravnborg 2007-10-14 43 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
0c53c8e6e Sam Ravnborg 2007-10-14 @44 include $(kbuild-file)
^1da177e4 Linus Torvalds 2005-04-16 45
0c53c8e6e Sam Ravnborg 2007-10-14 46 # If the save-* variables changed error out
0c53c8e6e Sam Ravnborg 2007-10-14 47 ifeq ($(KBUILD_NOPEDANTIC),)
0c53c8e6e Sam Ravnborg 2007-10-14 48 ifneq ("$(save-cflags)","$(CFLAGS)")
49c57d254 Arnaud Lacombe 2011-08-15 49 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
0c53c8e6e Sam Ravnborg 2007-10-14 50 endif
0c53c8e6e Sam Ravnborg 2007-10-14 51 endif
4a5838ad9 Borislav Petkov 2011-03-01 52
:::::: The code at line 44 was first introduced by commit
:::::: 0c53c8e6eb456cde30f2305421c605713856abc8 kbuild: check for wrong use of CFLAGS
:::::: TO: Sam Ravnborg <sam@neptun.(none)>
:::::: CC: Sam Ravnborg <sam@neptun.(none)>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 6336 bytes --]
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 2/9] selftests: update filesystems Makefile to work under selftests
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
2016-09-09 22:22 ` [PATCH 1/9] selftests: move dnotify_test from Documentation/filesystems Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-13 11:56 ` Michael Ellerman
2016-09-09 22:22 ` [PATCH 3/9] selftests: move .gitignore from Documentation/filesystems Shuah Khan
` (7 subsequent siblings)
9 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Update to work under selftests. dnotify_test will not be run as part of
selftests suite and will not included in install targets. It can be built
separately for now.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/testing/selftests/filesystems/Makefile | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
index 883010c..f1dce5c 100644
--- a/tools/testing/selftests/filesystems/Makefile
+++ b/tools/testing/selftests/filesystems/Makefile
@@ -1,5 +1,7 @@
-# List of programs to build
-hostprogs-y := dnotify_test
+TEST_PROGS := dnotify_test
+all: $(TEST_PROGS)
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
+include ../lib.mk
+
+clean:
+ rm -fr dnotify_test
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* Re: [PATCH 2/9] selftests: update filesystems Makefile to work under selftests
2016-09-09 22:22 ` [PATCH 2/9] selftests: update filesystems Makefile to work under selftests Shuah Khan
@ 2016-09-13 11:56 ` Michael Ellerman
2016-09-13 13:20 ` Shuah Khan
0 siblings, 1 reply; 23+ messages in thread
From: Michael Ellerman @ 2016-09-13 11:56 UTC (permalink / raw)
To: Shuah Khan, corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Shuah Khan <shuahkh@osg.samsung.com> writes:
> Update to work under selftests. dnotify_test will not be run as part of
> selftests suite and will not included in install targets. It can be built
> separately for now.
>
> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
> ---
> tools/testing/selftests/filesystems/Makefile | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
> index 883010c..f1dce5c 100644
> --- a/tools/testing/selftests/filesystems/Makefile
> +++ b/tools/testing/selftests/filesystems/Makefile
> @@ -1,5 +1,7 @@
> -# List of programs to build
> -hostprogs-y := dnotify_test
> +TEST_PROGS := dnotify_test
> +all: $(TEST_PROGS)
>
> -# Tell kbuild to always build the programs
> -always := $(hostprogs-y)
> +include ../lib.mk
> +
> +clean:
> + rm -fr dnotify_test
That's a complete rewrite of the Makefile, so I don't think there's any
value in bringing its content across from Documentation.
Better IMHO would be to squash this with the previous patch, so we get a
working test under selftests in a single commit.
cheers
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 2/9] selftests: update filesystems Makefile to work under selftests
2016-09-13 11:56 ` Michael Ellerman
@ 2016-09-13 13:20 ` Shuah Khan
0 siblings, 0 replies; 23+ messages in thread
From: Shuah Khan @ 2016-09-13 13:20 UTC (permalink / raw)
To: Michael Ellerman, corbet, richardcochran
Cc: linux-doc, linux-kernel, netdev, linux-kselftest, Shuah Khan
On 09/13/2016 05:56 AM, Michael Ellerman wrote:
> Shuah Khan <shuahkh@osg.samsung.com> writes:
>
>> Update to work under selftests. dnotify_test will not be run as part of
>> selftests suite and will not included in install targets. It can be built
>> separately for now.
>>
>> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
>> ---
>> tools/testing/selftests/filesystems/Makefile | 10 ++++++----
>> 1 file changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
>> index 883010c..f1dce5c 100644
>> --- a/tools/testing/selftests/filesystems/Makefile
>> +++ b/tools/testing/selftests/filesystems/Makefile
>> @@ -1,5 +1,7 @@
>> -# List of programs to build
>> -hostprogs-y := dnotify_test
>> +TEST_PROGS := dnotify_test
>> +all: $(TEST_PROGS)
>>
>> -# Tell kbuild to always build the programs
>> -always := $(hostprogs-y)
>> +include ../lib.mk
>> +
>> +clean:
>> + rm -fr dnotify_test
>
> That's a complete rewrite of the Makefile, so I don't think there's any
> value in bringing its content across from Documentation.
Moving Makefile accomplishes delete at the same time. I can combine
the move and updating Makefile into one single patch.
>
> Better IMHO would be to squash this with the previous patch, so we get a
> working test under selftests in a single commit.
>
> cheers
>
thanks,
-- Shuah
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 3/9] selftests: move .gitignore from Documentation/filesystems
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
2016-09-09 22:22 ` [PATCH 1/9] selftests: move dnotify_test from Documentation/filesystems Shuah Khan
2016-09-09 22:22 ` [PATCH 2/9] selftests: update filesystems Makefile to work under selftests Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-09 22:22 ` [PATCH 4/9] selftests: move prctl tests from Documentation/prctl Shuah Khan
` (6 subsequent siblings)
9 siblings, 0 replies; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Move .gitignore for dnotify_test from Documentation/filesystems to
selftests/filesystems.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
Documentation/filesystems/.gitignore | 1 -
tools/testing/selftests/filesystems/.gitignore | 1 +
2 files changed, 1 insertion(+), 1 deletion(-)
delete mode 100644 Documentation/filesystems/.gitignore
create mode 100644 tools/testing/selftests/filesystems/.gitignore
diff --git a/Documentation/filesystems/.gitignore b/Documentation/filesystems/.gitignore
deleted file mode 100644
index 31d6e42..0000000
--- a/Documentation/filesystems/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-dnotify_test
diff --git a/tools/testing/selftests/filesystems/.gitignore b/tools/testing/selftests/filesystems/.gitignore
new file mode 100644
index 0000000..31d6e42
--- /dev/null
+++ b/tools/testing/selftests/filesystems/.gitignore
@@ -0,0 +1 @@
+dnotify_test
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* [PATCH 4/9] selftests: move prctl tests from Documentation/prctl
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (2 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 3/9] selftests: move .gitignore from Documentation/filesystems Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-09 23:58 ` kbuild test robot
2016-09-10 0:05 ` kbuild test robot
2016-09-09 22:22 ` [PATCH 5/9] selftests: Update prctl Makefile to work under selftests Shuah Khan
` (5 subsequent siblings)
9 siblings, 2 replies; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Move prctl tests from Documentation/prctl to selftests/prctl.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
Documentation/prctl/.gitignore | 3 -
Documentation/prctl/Makefile | 10 ---
.../prctl/disable-tsc-ctxt-sw-stress-test.c | 97 ----------------------
.../prctl/disable-tsc-on-off-stress-test.c | 96 ---------------------
Documentation/prctl/disable-tsc-test.c | 95 ---------------------
tools/testing/selftests/prctl/.gitignore | 3 +
tools/testing/selftests/prctl/Makefile | 10 +++
.../prctl/disable-tsc-ctxt-sw-stress-test.c | 97 ++++++++++++++++++++++
.../prctl/disable-tsc-on-off-stress-test.c | 96 +++++++++++++++++++++
tools/testing/selftests/prctl/disable-tsc-test.c | 95 +++++++++++++++++++++
10 files changed, 301 insertions(+), 301 deletions(-)
delete mode 100644 Documentation/prctl/.gitignore
delete mode 100644 Documentation/prctl/Makefile
delete mode 100644 Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c
delete mode 100644 Documentation/prctl/disable-tsc-on-off-stress-test.c
delete mode 100644 Documentation/prctl/disable-tsc-test.c
create mode 100644 tools/testing/selftests/prctl/.gitignore
create mode 100644 tools/testing/selftests/prctl/Makefile
create mode 100644 tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c
create mode 100644 tools/testing/selftests/prctl/disable-tsc-on-off-stress-test.c
create mode 100644 tools/testing/selftests/prctl/disable-tsc-test.c
diff --git a/Documentation/prctl/.gitignore b/Documentation/prctl/.gitignore
deleted file mode 100644
index 0b5c274..0000000
--- a/Documentation/prctl/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-disable-tsc-ctxt-sw-stress-test
-disable-tsc-on-off-stress-test
-disable-tsc-test
diff --git a/Documentation/prctl/Makefile b/Documentation/prctl/Makefile
deleted file mode 100644
index 44de308..0000000
--- a/Documentation/prctl/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-ifndef CROSS_COMPILE
-# List of programs to build
-hostprogs-$(CONFIG_X86) := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test disable-tsc-test
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS_disable-tsc-ctxt-sw-stress-test.o += -I$(objtree)/usr/include
-HOSTCFLAGS_disable-tsc-on-off-stress-test.o += -I$(objtree)/usr/include
-HOSTCFLAGS_disable-tsc-test.o += -I$(objtree)/usr/include
-endif
diff --git a/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c b/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c
deleted file mode 100644
index f7499d1..0000000
--- a/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
- *
- * Tests if the control register is updated correctly
- * at context switches
- *
- * Warning: this test will cause a very high load for a few seconds
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <inttypes.h>
-#include <wait.h>
-
-
-#include <sys/prctl.h>
-#include <linux/prctl.h>
-
-/* Get/set the process' ability to use the timestamp counter instruction */
-#ifndef PR_GET_TSC
-#define PR_GET_TSC 25
-#define PR_SET_TSC 26
-# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
-# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
-#endif
-
-static uint64_t rdtsc(void)
-{
-uint32_t lo, hi;
-/* We cannot use "=A", since this would use %rax on x86_64 */
-__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
-return (uint64_t)hi << 32 | lo;
-}
-
-static void sigsegv_expect(int sig)
-{
- /* */
-}
-
-static void segvtask(void)
-{
- if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
- {
- perror("prctl");
- exit(0);
- }
- signal(SIGSEGV, sigsegv_expect);
- alarm(10);
- rdtsc();
- fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
- exit(0);
-}
-
-
-static void sigsegv_fail(int sig)
-{
- fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
- exit(0);
-}
-
-static void rdtsctask(void)
-{
- if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
- {
- perror("prctl");
- exit(0);
- }
- signal(SIGSEGV, sigsegv_fail);
- alarm(10);
- for(;;) rdtsc();
-}
-
-
-int main(void)
-{
- int n_tasks = 100, i;
-
- fprintf(stderr, "[No further output means we're allright]\n");
-
- for (i=0; i<n_tasks; i++)
- if (fork() == 0)
- {
- if (i & 1)
- segvtask();
- else
- rdtsctask();
- }
-
- for (i=0; i<n_tasks; i++)
- wait(NULL);
-
- exit(0);
-}
-
diff --git a/Documentation/prctl/disable-tsc-on-off-stress-test.c b/Documentation/prctl/disable-tsc-on-off-stress-test.c
deleted file mode 100644
index a06f027..0000000
--- a/Documentation/prctl/disable-tsc-on-off-stress-test.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
- *
- * Tests if the control register is updated correctly
- * when set with prctl()
- *
- * Warning: this test will cause a very high load for a few seconds
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <inttypes.h>
-#include <wait.h>
-
-
-#include <sys/prctl.h>
-#include <linux/prctl.h>
-
-/* Get/set the process' ability to use the timestamp counter instruction */
-#ifndef PR_GET_TSC
-#define PR_GET_TSC 25
-#define PR_SET_TSC 26
-# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
-# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
-#endif
-
-/* snippet from wikipedia :-) */
-
-static uint64_t rdtsc(void)
-{
-uint32_t lo, hi;
-/* We cannot use "=A", since this would use %rax on x86_64 */
-__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
-return (uint64_t)hi << 32 | lo;
-}
-
-int should_segv = 0;
-
-static void sigsegv_cb(int sig)
-{
- if (!should_segv)
- {
- fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
- exit(0);
- }
- if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
- {
- perror("prctl");
- exit(0);
- }
- should_segv = 0;
-
- rdtsc();
-}
-
-static void task(void)
-{
- signal(SIGSEGV, sigsegv_cb);
- alarm(10);
- for(;;)
- {
- rdtsc();
- if (should_segv)
- {
- fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
- exit(0);
- }
- if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
- {
- perror("prctl");
- exit(0);
- }
- should_segv = 1;
- }
-}
-
-
-int main(void)
-{
- int n_tasks = 100, i;
-
- fprintf(stderr, "[No further output means we're allright]\n");
-
- for (i=0; i<n_tasks; i++)
- if (fork() == 0)
- task();
-
- for (i=0; i<n_tasks; i++)
- wait(NULL);
-
- exit(0);
-}
-
diff --git a/Documentation/prctl/disable-tsc-test.c b/Documentation/prctl/disable-tsc-test.c
deleted file mode 100644
index 8d494f7..0000000
--- a/Documentation/prctl/disable-tsc-test.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
- *
- * Basic test to test behaviour of PR_GET_TSC and PR_SET_TSC
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <inttypes.h>
-
-
-#include <sys/prctl.h>
-#include <linux/prctl.h>
-
-/* Get/set the process' ability to use the timestamp counter instruction */
-#ifndef PR_GET_TSC
-#define PR_GET_TSC 25
-#define PR_SET_TSC 26
-# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
-# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
-#endif
-
-const char *tsc_names[] =
-{
- [0] = "[not set]",
- [PR_TSC_ENABLE] = "PR_TSC_ENABLE",
- [PR_TSC_SIGSEGV] = "PR_TSC_SIGSEGV",
-};
-
-static uint64_t rdtsc(void)
-{
-uint32_t lo, hi;
-/* We cannot use "=A", since this would use %rax on x86_64 */
-__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
-return (uint64_t)hi << 32 | lo;
-}
-
-static void sigsegv_cb(int sig)
-{
- int tsc_val = 0;
-
- printf("[ SIG_SEGV ]\n");
- printf("prctl(PR_GET_TSC, &tsc_val); ");
- fflush(stdout);
-
- if ( prctl(PR_GET_TSC, &tsc_val) == -1)
- perror("prctl");
-
- printf("tsc_val == %s\n", tsc_names[tsc_val]);
- printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n");
- fflush(stdout);
- if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1)
- perror("prctl");
-
- printf("rdtsc() == ");
-}
-
-int main(void)
-{
- int tsc_val = 0;
-
- signal(SIGSEGV, sigsegv_cb);
-
- printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
- printf("prctl(PR_GET_TSC, &tsc_val); ");
- fflush(stdout);
-
- if ( prctl(PR_GET_TSC, &tsc_val) == -1)
- perror("prctl");
-
- printf("tsc_val == %s\n", tsc_names[tsc_val]);
- printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
- printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n");
- fflush(stdout);
-
- if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1)
- perror("prctl");
-
- printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
- printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV)\n");
- fflush(stdout);
-
- if ( prctl(PR_SET_TSC, PR_TSC_SIGSEGV) == -1)
- perror("prctl");
-
- printf("rdtsc() == ");
- fflush(stdout);
- printf("%llu\n", (unsigned long long)rdtsc());
- fflush(stdout);
-
- exit(EXIT_SUCCESS);
-}
-
diff --git a/tools/testing/selftests/prctl/.gitignore b/tools/testing/selftests/prctl/.gitignore
new file mode 100644
index 0000000..0b5c274
--- /dev/null
+++ b/tools/testing/selftests/prctl/.gitignore
@@ -0,0 +1,3 @@
+disable-tsc-ctxt-sw-stress-test
+disable-tsc-on-off-stress-test
+disable-tsc-test
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
new file mode 100644
index 0000000..44de308
--- /dev/null
+++ b/tools/testing/selftests/prctl/Makefile
@@ -0,0 +1,10 @@
+ifndef CROSS_COMPILE
+# List of programs to build
+hostprogs-$(CONFIG_X86) := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test disable-tsc-test
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
+
+HOSTCFLAGS_disable-tsc-ctxt-sw-stress-test.o += -I$(objtree)/usr/include
+HOSTCFLAGS_disable-tsc-on-off-stress-test.o += -I$(objtree)/usr/include
+HOSTCFLAGS_disable-tsc-test.o += -I$(objtree)/usr/include
+endif
diff --git a/tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c b/tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c
new file mode 100644
index 0000000..f7499d1
--- /dev/null
+++ b/tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c
@@ -0,0 +1,97 @@
+/*
+ * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
+ *
+ * Tests if the control register is updated correctly
+ * at context switches
+ *
+ * Warning: this test will cause a very high load for a few seconds
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <inttypes.h>
+#include <wait.h>
+
+
+#include <sys/prctl.h>
+#include <linux/prctl.h>
+
+/* Get/set the process' ability to use the timestamp counter instruction */
+#ifndef PR_GET_TSC
+#define PR_GET_TSC 25
+#define PR_SET_TSC 26
+# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
+# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
+#endif
+
+static uint64_t rdtsc(void)
+{
+uint32_t lo, hi;
+/* We cannot use "=A", since this would use %rax on x86_64 */
+__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
+return (uint64_t)hi << 32 | lo;
+}
+
+static void sigsegv_expect(int sig)
+{
+ /* */
+}
+
+static void segvtask(void)
+{
+ if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
+ {
+ perror("prctl");
+ exit(0);
+ }
+ signal(SIGSEGV, sigsegv_expect);
+ alarm(10);
+ rdtsc();
+ fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
+ exit(0);
+}
+
+
+static void sigsegv_fail(int sig)
+{
+ fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
+ exit(0);
+}
+
+static void rdtsctask(void)
+{
+ if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
+ {
+ perror("prctl");
+ exit(0);
+ }
+ signal(SIGSEGV, sigsegv_fail);
+ alarm(10);
+ for(;;) rdtsc();
+}
+
+
+int main(void)
+{
+ int n_tasks = 100, i;
+
+ fprintf(stderr, "[No further output means we're allright]\n");
+
+ for (i=0; i<n_tasks; i++)
+ if (fork() == 0)
+ {
+ if (i & 1)
+ segvtask();
+ else
+ rdtsctask();
+ }
+
+ for (i=0; i<n_tasks; i++)
+ wait(NULL);
+
+ exit(0);
+}
+
diff --git a/tools/testing/selftests/prctl/disable-tsc-on-off-stress-test.c b/tools/testing/selftests/prctl/disable-tsc-on-off-stress-test.c
new file mode 100644
index 0000000..a06f027
--- /dev/null
+++ b/tools/testing/selftests/prctl/disable-tsc-on-off-stress-test.c
@@ -0,0 +1,96 @@
+/*
+ * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
+ *
+ * Tests if the control register is updated correctly
+ * when set with prctl()
+ *
+ * Warning: this test will cause a very high load for a few seconds
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <inttypes.h>
+#include <wait.h>
+
+
+#include <sys/prctl.h>
+#include <linux/prctl.h>
+
+/* Get/set the process' ability to use the timestamp counter instruction */
+#ifndef PR_GET_TSC
+#define PR_GET_TSC 25
+#define PR_SET_TSC 26
+# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
+# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
+#endif
+
+/* snippet from wikipedia :-) */
+
+static uint64_t rdtsc(void)
+{
+uint32_t lo, hi;
+/* We cannot use "=A", since this would use %rax on x86_64 */
+__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
+return (uint64_t)hi << 32 | lo;
+}
+
+int should_segv = 0;
+
+static void sigsegv_cb(int sig)
+{
+ if (!should_segv)
+ {
+ fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
+ exit(0);
+ }
+ if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
+ {
+ perror("prctl");
+ exit(0);
+ }
+ should_segv = 0;
+
+ rdtsc();
+}
+
+static void task(void)
+{
+ signal(SIGSEGV, sigsegv_cb);
+ alarm(10);
+ for(;;)
+ {
+ rdtsc();
+ if (should_segv)
+ {
+ fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
+ exit(0);
+ }
+ if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
+ {
+ perror("prctl");
+ exit(0);
+ }
+ should_segv = 1;
+ }
+}
+
+
+int main(void)
+{
+ int n_tasks = 100, i;
+
+ fprintf(stderr, "[No further output means we're allright]\n");
+
+ for (i=0; i<n_tasks; i++)
+ if (fork() == 0)
+ task();
+
+ for (i=0; i<n_tasks; i++)
+ wait(NULL);
+
+ exit(0);
+}
+
diff --git a/tools/testing/selftests/prctl/disable-tsc-test.c b/tools/testing/selftests/prctl/disable-tsc-test.c
new file mode 100644
index 0000000..8d494f7
--- /dev/null
+++ b/tools/testing/selftests/prctl/disable-tsc-test.c
@@ -0,0 +1,95 @@
+/*
+ * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
+ *
+ * Basic test to test behaviour of PR_GET_TSC and PR_SET_TSC
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <inttypes.h>
+
+
+#include <sys/prctl.h>
+#include <linux/prctl.h>
+
+/* Get/set the process' ability to use the timestamp counter instruction */
+#ifndef PR_GET_TSC
+#define PR_GET_TSC 25
+#define PR_SET_TSC 26
+# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
+# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
+#endif
+
+const char *tsc_names[] =
+{
+ [0] = "[not set]",
+ [PR_TSC_ENABLE] = "PR_TSC_ENABLE",
+ [PR_TSC_SIGSEGV] = "PR_TSC_SIGSEGV",
+};
+
+static uint64_t rdtsc(void)
+{
+uint32_t lo, hi;
+/* We cannot use "=A", since this would use %rax on x86_64 */
+__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
+return (uint64_t)hi << 32 | lo;
+}
+
+static void sigsegv_cb(int sig)
+{
+ int tsc_val = 0;
+
+ printf("[ SIG_SEGV ]\n");
+ printf("prctl(PR_GET_TSC, &tsc_val); ");
+ fflush(stdout);
+
+ if ( prctl(PR_GET_TSC, &tsc_val) == -1)
+ perror("prctl");
+
+ printf("tsc_val == %s\n", tsc_names[tsc_val]);
+ printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n");
+ fflush(stdout);
+ if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1)
+ perror("prctl");
+
+ printf("rdtsc() == ");
+}
+
+int main(void)
+{
+ int tsc_val = 0;
+
+ signal(SIGSEGV, sigsegv_cb);
+
+ printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
+ printf("prctl(PR_GET_TSC, &tsc_val); ");
+ fflush(stdout);
+
+ if ( prctl(PR_GET_TSC, &tsc_val) == -1)
+ perror("prctl");
+
+ printf("tsc_val == %s\n", tsc_names[tsc_val]);
+ printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
+ printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n");
+ fflush(stdout);
+
+ if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1)
+ perror("prctl");
+
+ printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
+ printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV)\n");
+ fflush(stdout);
+
+ if ( prctl(PR_SET_TSC, PR_TSC_SIGSEGV) == -1)
+ perror("prctl");
+
+ printf("rdtsc() == ");
+ fflush(stdout);
+ printf("%llu\n", (unsigned long long)rdtsc());
+ fflush(stdout);
+
+ exit(EXIT_SUCCESS);
+}
+
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* Re: [PATCH 4/9] selftests: move prctl tests from Documentation/prctl
2016-09-09 22:22 ` [PATCH 4/9] selftests: move prctl tests from Documentation/prctl Shuah Khan
@ 2016-09-09 23:58 ` kbuild test robot
2016-09-10 0:05 ` kbuild test robot
1 sibling, 0 replies; 23+ messages in thread
From: kbuild test robot @ 2016-09-09 23:58 UTC (permalink / raw)
To: Shuah Khan
Cc: kbuild-all, corbet, richardcochran, Shuah Khan, linux-doc,
linux-kernel, netdev, linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 1726 bytes --]
Hi Shuah,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc5 next-20160909]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Shuah-Khan/Move-runnable-code-tests-from-Documentation-to-selftests/20160910-063538
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
scripts/Makefile.clean:14: Documentation/prctl/Makefile: No such file or directory
>> make[3]: *** No rule to make target 'Documentation/prctl/Makefile'.
make[3]: Failed to remake makefile 'Documentation/prctl/Makefile'.
make[2]: *** [Documentation/prctl] Error 2
scripts/Makefile.clean:14: Documentation/filesystems/Makefile: No such file or directory
make[3]: *** No rule to make target 'Documentation/filesystems/Makefile'.
make[3]: Failed to remake makefile 'Documentation/filesystems/Makefile'.
make[2]: *** [Documentation/filesystems] Error 2
make[2]: Target '__clean' not remade because of errors.
make[1]: *** [_clean_Documentation] Error 2
make[1]: Target 'distclean' not remade because of errors.
make: *** [sub-make] Error 2
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 6336 bytes --]
^ permalink raw reply [flat|nested] 23+ messages in thread* Re: [PATCH 4/9] selftests: move prctl tests from Documentation/prctl
2016-09-09 22:22 ` [PATCH 4/9] selftests: move prctl tests from Documentation/prctl Shuah Khan
2016-09-09 23:58 ` kbuild test robot
@ 2016-09-10 0:05 ` kbuild test robot
1 sibling, 0 replies; 23+ messages in thread
From: kbuild test robot @ 2016-09-10 0:05 UTC (permalink / raw)
To: Shuah Khan
Cc: kbuild-all, corbet, richardcochran, Shuah Khan, linux-doc,
linux-kernel, netdev, linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 2288 bytes --]
Hi Shuah,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc5 next-20160909]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Shuah-Khan/Move-runnable-code-tests-from-Documentation-to-selftests/20160910-063538
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
>> scripts/Makefile.build:44: Documentation/prctl/Makefile: No such file or directory
make[3]: *** No rule to make target 'Documentation/prctl/Makefile'.
make[3]: Failed to remake makefile 'Documentation/prctl/Makefile'.
vim +44 scripts/Makefile.build
3156fd052 Robert P. J. Day 2008-02-18 38 # For backward compatibility check that these variables do not change
0c53c8e6e Sam Ravnborg 2007-10-14 39 save-cflags := $(CFLAGS)
0c53c8e6e Sam Ravnborg 2007-10-14 40
2a6914703 Sam Ravnborg 2005-07-25 41 # The filename Kbuild has precedence over Makefile
db8c1a7b2 Sam Ravnborg 2005-07-27 42 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
0c53c8e6e Sam Ravnborg 2007-10-14 43 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
0c53c8e6e Sam Ravnborg 2007-10-14 @44 include $(kbuild-file)
^1da177e4 Linus Torvalds 2005-04-16 45
0c53c8e6e Sam Ravnborg 2007-10-14 46 # If the save-* variables changed error out
0c53c8e6e Sam Ravnborg 2007-10-14 47 ifeq ($(KBUILD_NOPEDANTIC),)
:::::: The code at line 44 was first introduced by commit
:::::: 0c53c8e6eb456cde30f2305421c605713856abc8 kbuild: check for wrong use of CFLAGS
:::::: TO: Sam Ravnborg <sam@neptun.(none)>
:::::: CC: Sam Ravnborg <sam@neptun.(none)>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 6336 bytes --]
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 5/9] selftests: Update prctl Makefile to work under selftests
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (3 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 4/9] selftests: move prctl tests from Documentation/prctl Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-09 22:22 ` [PATCH 6/9] selftests: move ptp tests from Documentation/ptp Shuah Khan
` (4 subsequent siblings)
9 siblings, 0 replies; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Update prctl Makefile to work under selftests. prctl will not be run as
part of selftests suite and will not included in install targets. They
can be built separately for now.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/testing/selftests/prctl/Makefile | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile
index 44de308..35aa1c8 100644
--- a/tools/testing/selftests/prctl/Makefile
+++ b/tools/testing/selftests/prctl/Makefile
@@ -1,10 +1,15 @@
ifndef CROSS_COMPILE
-# List of programs to build
-hostprogs-$(CONFIG_X86) := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test disable-tsc-test
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
+uname_M := $(shell uname -m 2>/dev/null || echo not)
+ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
-HOSTCFLAGS_disable-tsc-ctxt-sw-stress-test.o += -I$(objtree)/usr/include
-HOSTCFLAGS_disable-tsc-on-off-stress-test.o += -I$(objtree)/usr/include
-HOSTCFLAGS_disable-tsc-test.o += -I$(objtree)/usr/include
+ifeq ($(ARCH),x86)
+TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
+ disable-tsc-test
+all: $(TEST_PROGS)
+
+include ../lib.mk
+
+clean:
+ rm -fr $(TEST_PROGS)
+endif
endif
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* [PATCH 6/9] selftests: move ptp tests from Documentation/ptp
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (4 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 5/9] selftests: Update prctl Makefile to work under selftests Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-10 0:07 ` kbuild test robot
2016-09-09 22:22 ` [PATCH 7/9] selftests: Update ptp Makefile to work under selftests Shuah Khan
` (3 subsequent siblings)
9 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Move ptp tests from Documentation/ptp to selftests/ptp.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
Documentation/ptp/.gitignore | 1 -
Documentation/ptp/Makefile | 8 -
Documentation/ptp/testptp.c | 523 ---------------------------------
Documentation/ptp/testptp.mk | 33 ---
tools/testing/selftests/ptp/.gitignore | 1 +
tools/testing/selftests/ptp/Makefile | 8 +
tools/testing/selftests/ptp/testptp.c | 523 +++++++++++++++++++++++++++++++++
tools/testing/selftests/ptp/testptp.mk | 33 +++
8 files changed, 565 insertions(+), 565 deletions(-)
delete mode 100644 Documentation/ptp/.gitignore
delete mode 100644 Documentation/ptp/Makefile
delete mode 100644 Documentation/ptp/testptp.c
delete mode 100644 Documentation/ptp/testptp.mk
create mode 100644 tools/testing/selftests/ptp/.gitignore
create mode 100644 tools/testing/selftests/ptp/Makefile
create mode 100644 tools/testing/selftests/ptp/testptp.c
create mode 100644 tools/testing/selftests/ptp/testptp.mk
diff --git a/Documentation/ptp/.gitignore b/Documentation/ptp/.gitignore
deleted file mode 100644
index f562e49..0000000
--- a/Documentation/ptp/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-testptp
diff --git a/Documentation/ptp/Makefile b/Documentation/ptp/Makefile
deleted file mode 100644
index 293d6c0..0000000
--- a/Documentation/ptp/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# List of programs to build
-hostprogs-y := testptp
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS_testptp.o += -I$(objtree)/usr/include
-HOSTLOADLIBES_testptp := -lrt
diff --git a/Documentation/ptp/testptp.c b/Documentation/ptp/testptp.c
deleted file mode 100644
index 5d2eae1..0000000
--- a/Documentation/ptp/testptp.c
+++ /dev/null
@@ -1,523 +0,0 @@
-/*
- * PTP 1588 clock support - User space test program
- *
- * Copyright (C) 2010 OMICRON electronics GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-#define _GNU_SOURCE
-#define __SANE_USERSPACE_TYPES__ /* For PPC64, to get LL64 types */
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <math.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/timex.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <linux/ptp_clock.h>
-
-#define DEVICE "/dev/ptp0"
-
-#ifndef ADJ_SETOFFSET
-#define ADJ_SETOFFSET 0x0100
-#endif
-
-#ifndef CLOCK_INVALID
-#define CLOCK_INVALID -1
-#endif
-
-/* clock_adjtime is not available in GLIBC < 2.14 */
-#if !__GLIBC_PREREQ(2, 14)
-#include <sys/syscall.h>
-static int clock_adjtime(clockid_t id, struct timex *tx)
-{
- return syscall(__NR_clock_adjtime, id, tx);
-}
-#endif
-
-static clockid_t get_clockid(int fd)
-{
-#define CLOCKFD 3
-#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD)
-
- return FD_TO_CLOCKID(fd);
-}
-
-static void handle_alarm(int s)
-{
- printf("received signal %d\n", s);
-}
-
-static int install_handler(int signum, void (*handler)(int))
-{
- struct sigaction action;
- sigset_t mask;
-
- /* Unblock the signal. */
- sigemptyset(&mask);
- sigaddset(&mask, signum);
- sigprocmask(SIG_UNBLOCK, &mask, NULL);
-
- /* Install the signal handler. */
- action.sa_handler = handler;
- action.sa_flags = 0;
- sigemptyset(&action.sa_mask);
- sigaction(signum, &action, NULL);
-
- return 0;
-}
-
-static long ppb_to_scaled_ppm(int ppb)
-{
- /*
- * The 'freq' field in the 'struct timex' is in parts per
- * million, but with a 16 bit binary fractional field.
- * Instead of calculating either one of
- *
- * scaled_ppm = (ppb / 1000) << 16 [1]
- * scaled_ppm = (ppb << 16) / 1000 [2]
- *
- * we simply use double precision math, in order to avoid the
- * truncation in [1] and the possible overflow in [2].
- */
- return (long) (ppb * 65.536);
-}
-
-static int64_t pctns(struct ptp_clock_time *t)
-{
- return t->sec * 1000000000LL + t->nsec;
-}
-
-static void usage(char *progname)
-{
- fprintf(stderr,
- "usage: %s [options]\n"
- " -a val request a one-shot alarm after 'val' seconds\n"
- " -A val request a periodic alarm every 'val' seconds\n"
- " -c query the ptp clock's capabilities\n"
- " -d name device to open\n"
- " -e val read 'val' external time stamp events\n"
- " -f val adjust the ptp clock frequency by 'val' ppb\n"
- " -g get the ptp clock time\n"
- " -h prints this message\n"
- " -i val index for event/trigger\n"
- " -k val measure the time offset between system and phc clock\n"
- " for 'val' times (Maximum 25)\n"
- " -l list the current pin configuration\n"
- " -L pin,val configure pin index 'pin' with function 'val'\n"
- " the channel index is taken from the '-i' option\n"
- " 'val' specifies the auxiliary function:\n"
- " 0 - none\n"
- " 1 - external time stamp\n"
- " 2 - periodic output\n"
- " -p val enable output with a period of 'val' nanoseconds\n"
- " -P val enable or disable (val=1|0) the system clock PPS\n"
- " -s set the ptp clock time from the system time\n"
- " -S set the system time from the ptp clock time\n"
- " -t val shift the ptp clock time by 'val' seconds\n"
- " -T val set the ptp clock time to 'val' seconds\n",
- progname);
-}
-
-int main(int argc, char *argv[])
-{
- struct ptp_clock_caps caps;
- struct ptp_extts_event event;
- struct ptp_extts_request extts_request;
- struct ptp_perout_request perout_request;
- struct ptp_pin_desc desc;
- struct timespec ts;
- struct timex tx;
-
- static timer_t timerid;
- struct itimerspec timeout;
- struct sigevent sigevent;
-
- struct ptp_clock_time *pct;
- struct ptp_sys_offset *sysoff;
-
-
- char *progname;
- unsigned int i;
- int c, cnt, fd;
-
- char *device = DEVICE;
- clockid_t clkid;
- int adjfreq = 0x7fffffff;
- int adjtime = 0;
- int capabilities = 0;
- int extts = 0;
- int gettime = 0;
- int index = 0;
- int list_pins = 0;
- int oneshot = 0;
- int pct_offset = 0;
- int n_samples = 0;
- int periodic = 0;
- int perout = -1;
- int pin_index = -1, pin_func;
- int pps = -1;
- int seconds = 0;
- int settime = 0;
-
- int64_t t1, t2, tp;
- int64_t interval, offset;
-
- progname = strrchr(argv[0], '/');
- progname = progname ? 1+progname : argv[0];
- while (EOF != (c = getopt(argc, argv, "a:A:cd:e:f:ghi:k:lL:p:P:sSt:T:v"))) {
- switch (c) {
- case 'a':
- oneshot = atoi(optarg);
- break;
- case 'A':
- periodic = atoi(optarg);
- break;
- case 'c':
- capabilities = 1;
- break;
- case 'd':
- device = optarg;
- break;
- case 'e':
- extts = atoi(optarg);
- break;
- case 'f':
- adjfreq = atoi(optarg);
- break;
- case 'g':
- gettime = 1;
- break;
- case 'i':
- index = atoi(optarg);
- break;
- case 'k':
- pct_offset = 1;
- n_samples = atoi(optarg);
- break;
- case 'l':
- list_pins = 1;
- break;
- case 'L':
- cnt = sscanf(optarg, "%d,%d", &pin_index, &pin_func);
- if (cnt != 2) {
- usage(progname);
- return -1;
- }
- break;
- case 'p':
- perout = atoi(optarg);
- break;
- case 'P':
- pps = atoi(optarg);
- break;
- case 's':
- settime = 1;
- break;
- case 'S':
- settime = 2;
- break;
- case 't':
- adjtime = atoi(optarg);
- break;
- case 'T':
- settime = 3;
- seconds = atoi(optarg);
- break;
- case 'h':
- usage(progname);
- return 0;
- case '?':
- default:
- usage(progname);
- return -1;
- }
- }
-
- fd = open(device, O_RDWR);
- if (fd < 0) {
- fprintf(stderr, "opening %s: %s\n", device, strerror(errno));
- return -1;
- }
-
- clkid = get_clockid(fd);
- if (CLOCK_INVALID == clkid) {
- fprintf(stderr, "failed to read clock id\n");
- return -1;
- }
-
- if (capabilities) {
- if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
- perror("PTP_CLOCK_GETCAPS");
- } else {
- printf("capabilities:\n"
- " %d maximum frequency adjustment (ppb)\n"
- " %d programmable alarms\n"
- " %d external time stamp channels\n"
- " %d programmable periodic signals\n"
- " %d pulse per second\n"
- " %d programmable pins\n"
- " %d cross timestamping\n",
- caps.max_adj,
- caps.n_alarm,
- caps.n_ext_ts,
- caps.n_per_out,
- caps.pps,
- caps.n_pins,
- caps.cross_timestamping);
- }
- }
-
- if (0x7fffffff != adjfreq) {
- memset(&tx, 0, sizeof(tx));
- tx.modes = ADJ_FREQUENCY;
- tx.freq = ppb_to_scaled_ppm(adjfreq);
- if (clock_adjtime(clkid, &tx)) {
- perror("clock_adjtime");
- } else {
- puts("frequency adjustment okay");
- }
- }
-
- if (adjtime) {
- memset(&tx, 0, sizeof(tx));
- tx.modes = ADJ_SETOFFSET;
- tx.time.tv_sec = adjtime;
- tx.time.tv_usec = 0;
- if (clock_adjtime(clkid, &tx) < 0) {
- perror("clock_adjtime");
- } else {
- puts("time shift okay");
- }
- }
-
- if (gettime) {
- if (clock_gettime(clkid, &ts)) {
- perror("clock_gettime");
- } else {
- printf("clock time: %ld.%09ld or %s",
- ts.tv_sec, ts.tv_nsec, ctime(&ts.tv_sec));
- }
- }
-
- if (settime == 1) {
- clock_gettime(CLOCK_REALTIME, &ts);
- if (clock_settime(clkid, &ts)) {
- perror("clock_settime");
- } else {
- puts("set time okay");
- }
- }
-
- if (settime == 2) {
- clock_gettime(clkid, &ts);
- if (clock_settime(CLOCK_REALTIME, &ts)) {
- perror("clock_settime");
- } else {
- puts("set time okay");
- }
- }
-
- if (settime == 3) {
- ts.tv_sec = seconds;
- ts.tv_nsec = 0;
- if (clock_settime(clkid, &ts)) {
- perror("clock_settime");
- } else {
- puts("set time okay");
- }
- }
-
- if (extts) {
- memset(&extts_request, 0, sizeof(extts_request));
- extts_request.index = index;
- extts_request.flags = PTP_ENABLE_FEATURE;
- if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
- perror("PTP_EXTTS_REQUEST");
- extts = 0;
- } else {
- puts("external time stamp request okay");
- }
- for (; extts; extts--) {
- cnt = read(fd, &event, sizeof(event));
- if (cnt != sizeof(event)) {
- perror("read");
- break;
- }
- printf("event index %u at %lld.%09u\n", event.index,
- event.t.sec, event.t.nsec);
- fflush(stdout);
- }
- /* Disable the feature again. */
- extts_request.flags = 0;
- if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
- perror("PTP_EXTTS_REQUEST");
- }
- }
-
- if (list_pins) {
- int n_pins = 0;
- if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
- perror("PTP_CLOCK_GETCAPS");
- } else {
- n_pins = caps.n_pins;
- }
- for (i = 0; i < n_pins; i++) {
- desc.index = i;
- if (ioctl(fd, PTP_PIN_GETFUNC, &desc)) {
- perror("PTP_PIN_GETFUNC");
- break;
- }
- printf("name %s index %u func %u chan %u\n",
- desc.name, desc.index, desc.func, desc.chan);
- }
- }
-
- if (oneshot) {
- install_handler(SIGALRM, handle_alarm);
- /* Create a timer. */
- sigevent.sigev_notify = SIGEV_SIGNAL;
- sigevent.sigev_signo = SIGALRM;
- if (timer_create(clkid, &sigevent, &timerid)) {
- perror("timer_create");
- return -1;
- }
- /* Start the timer. */
- memset(&timeout, 0, sizeof(timeout));
- timeout.it_value.tv_sec = oneshot;
- if (timer_settime(timerid, 0, &timeout, NULL)) {
- perror("timer_settime");
- return -1;
- }
- pause();
- timer_delete(timerid);
- }
-
- if (periodic) {
- install_handler(SIGALRM, handle_alarm);
- /* Create a timer. */
- sigevent.sigev_notify = SIGEV_SIGNAL;
- sigevent.sigev_signo = SIGALRM;
- if (timer_create(clkid, &sigevent, &timerid)) {
- perror("timer_create");
- return -1;
- }
- /* Start the timer. */
- memset(&timeout, 0, sizeof(timeout));
- timeout.it_interval.tv_sec = periodic;
- timeout.it_value.tv_sec = periodic;
- if (timer_settime(timerid, 0, &timeout, NULL)) {
- perror("timer_settime");
- return -1;
- }
- while (1) {
- pause();
- }
- timer_delete(timerid);
- }
-
- if (perout >= 0) {
- if (clock_gettime(clkid, &ts)) {
- perror("clock_gettime");
- return -1;
- }
- memset(&perout_request, 0, sizeof(perout_request));
- perout_request.index = index;
- perout_request.start.sec = ts.tv_sec + 2;
- perout_request.start.nsec = 0;
- perout_request.period.sec = 0;
- perout_request.period.nsec = perout;
- if (ioctl(fd, PTP_PEROUT_REQUEST, &perout_request)) {
- perror("PTP_PEROUT_REQUEST");
- } else {
- puts("periodic output request okay");
- }
- }
-
- if (pin_index >= 0) {
- memset(&desc, 0, sizeof(desc));
- desc.index = pin_index;
- desc.func = pin_func;
- desc.chan = index;
- if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
- perror("PTP_PIN_SETFUNC");
- } else {
- puts("set pin function okay");
- }
- }
-
- if (pps != -1) {
- int enable = pps ? 1 : 0;
- if (ioctl(fd, PTP_ENABLE_PPS, enable)) {
- perror("PTP_ENABLE_PPS");
- } else {
- puts("pps for system time request okay");
- }
- }
-
- if (pct_offset) {
- if (n_samples <= 0 || n_samples > 25) {
- puts("n_samples should be between 1 and 25");
- usage(progname);
- return -1;
- }
-
- sysoff = calloc(1, sizeof(*sysoff));
- if (!sysoff) {
- perror("calloc");
- return -1;
- }
- sysoff->n_samples = n_samples;
-
- if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
- perror("PTP_SYS_OFFSET");
- else
- puts("system and phc clock time offset request okay");
-
- pct = &sysoff->ts[0];
- for (i = 0; i < sysoff->n_samples; i++) {
- t1 = pctns(pct+2*i);
- tp = pctns(pct+2*i+1);
- t2 = pctns(pct+2*i+2);
- interval = t2 - t1;
- offset = (t2 + t1) / 2 - tp;
-
- printf("system time: %lld.%u\n",
- (pct+2*i)->sec, (pct+2*i)->nsec);
- printf("phc time: %lld.%u\n",
- (pct+2*i+1)->sec, (pct+2*i+1)->nsec);
- printf("system time: %lld.%u\n",
- (pct+2*i+2)->sec, (pct+2*i+2)->nsec);
- printf("system/phc clock time offset is %" PRId64 " ns\n"
- "system clock time delay is %" PRId64 " ns\n",
- offset, interval);
- }
-
- free(sysoff);
- }
-
- close(fd);
- return 0;
-}
diff --git a/Documentation/ptp/testptp.mk b/Documentation/ptp/testptp.mk
deleted file mode 100644
index 4ef2d97..0000000
--- a/Documentation/ptp/testptp.mk
+++ /dev/null
@@ -1,33 +0,0 @@
-# PTP 1588 clock support - User space test program
-#
-# Copyright (C) 2010 OMICRON electronics GmbH
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-CC = $(CROSS_COMPILE)gcc
-INC = -I$(KBUILD_OUTPUT)/usr/include
-CFLAGS = -Wall $(INC)
-LDLIBS = -lrt
-PROGS = testptp
-
-all: $(PROGS)
-
-testptp: testptp.o
-
-clean:
- rm -f testptp.o
-
-distclean: clean
- rm -f $(PROGS)
diff --git a/tools/testing/selftests/ptp/.gitignore b/tools/testing/selftests/ptp/.gitignore
new file mode 100644
index 0000000..f562e49
--- /dev/null
+++ b/tools/testing/selftests/ptp/.gitignore
@@ -0,0 +1 @@
+testptp
diff --git a/tools/testing/selftests/ptp/Makefile b/tools/testing/selftests/ptp/Makefile
new file mode 100644
index 0000000..293d6c0
--- /dev/null
+++ b/tools/testing/selftests/ptp/Makefile
@@ -0,0 +1,8 @@
+# List of programs to build
+hostprogs-y := testptp
+
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
+
+HOSTCFLAGS_testptp.o += -I$(objtree)/usr/include
+HOSTLOADLIBES_testptp := -lrt
diff --git a/tools/testing/selftests/ptp/testptp.c b/tools/testing/selftests/ptp/testptp.c
new file mode 100644
index 0000000..5d2eae1
--- /dev/null
+++ b/tools/testing/selftests/ptp/testptp.c
@@ -0,0 +1,523 @@
+/*
+ * PTP 1588 clock support - User space test program
+ *
+ * Copyright (C) 2010 OMICRON electronics GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#define _GNU_SOURCE
+#define __SANE_USERSPACE_TYPES__ /* For PPC64, to get LL64 types */
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <linux/ptp_clock.h>
+
+#define DEVICE "/dev/ptp0"
+
+#ifndef ADJ_SETOFFSET
+#define ADJ_SETOFFSET 0x0100
+#endif
+
+#ifndef CLOCK_INVALID
+#define CLOCK_INVALID -1
+#endif
+
+/* clock_adjtime is not available in GLIBC < 2.14 */
+#if !__GLIBC_PREREQ(2, 14)
+#include <sys/syscall.h>
+static int clock_adjtime(clockid_t id, struct timex *tx)
+{
+ return syscall(__NR_clock_adjtime, id, tx);
+}
+#endif
+
+static clockid_t get_clockid(int fd)
+{
+#define CLOCKFD 3
+#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD)
+
+ return FD_TO_CLOCKID(fd);
+}
+
+static void handle_alarm(int s)
+{
+ printf("received signal %d\n", s);
+}
+
+static int install_handler(int signum, void (*handler)(int))
+{
+ struct sigaction action;
+ sigset_t mask;
+
+ /* Unblock the signal. */
+ sigemptyset(&mask);
+ sigaddset(&mask, signum);
+ sigprocmask(SIG_UNBLOCK, &mask, NULL);
+
+ /* Install the signal handler. */
+ action.sa_handler = handler;
+ action.sa_flags = 0;
+ sigemptyset(&action.sa_mask);
+ sigaction(signum, &action, NULL);
+
+ return 0;
+}
+
+static long ppb_to_scaled_ppm(int ppb)
+{
+ /*
+ * The 'freq' field in the 'struct timex' is in parts per
+ * million, but with a 16 bit binary fractional field.
+ * Instead of calculating either one of
+ *
+ * scaled_ppm = (ppb / 1000) << 16 [1]
+ * scaled_ppm = (ppb << 16) / 1000 [2]
+ *
+ * we simply use double precision math, in order to avoid the
+ * truncation in [1] and the possible overflow in [2].
+ */
+ return (long) (ppb * 65.536);
+}
+
+static int64_t pctns(struct ptp_clock_time *t)
+{
+ return t->sec * 1000000000LL + t->nsec;
+}
+
+static void usage(char *progname)
+{
+ fprintf(stderr,
+ "usage: %s [options]\n"
+ " -a val request a one-shot alarm after 'val' seconds\n"
+ " -A val request a periodic alarm every 'val' seconds\n"
+ " -c query the ptp clock's capabilities\n"
+ " -d name device to open\n"
+ " -e val read 'val' external time stamp events\n"
+ " -f val adjust the ptp clock frequency by 'val' ppb\n"
+ " -g get the ptp clock time\n"
+ " -h prints this message\n"
+ " -i val index for event/trigger\n"
+ " -k val measure the time offset between system and phc clock\n"
+ " for 'val' times (Maximum 25)\n"
+ " -l list the current pin configuration\n"
+ " -L pin,val configure pin index 'pin' with function 'val'\n"
+ " the channel index is taken from the '-i' option\n"
+ " 'val' specifies the auxiliary function:\n"
+ " 0 - none\n"
+ " 1 - external time stamp\n"
+ " 2 - periodic output\n"
+ " -p val enable output with a period of 'val' nanoseconds\n"
+ " -P val enable or disable (val=1|0) the system clock PPS\n"
+ " -s set the ptp clock time from the system time\n"
+ " -S set the system time from the ptp clock time\n"
+ " -t val shift the ptp clock time by 'val' seconds\n"
+ " -T val set the ptp clock time to 'val' seconds\n",
+ progname);
+}
+
+int main(int argc, char *argv[])
+{
+ struct ptp_clock_caps caps;
+ struct ptp_extts_event event;
+ struct ptp_extts_request extts_request;
+ struct ptp_perout_request perout_request;
+ struct ptp_pin_desc desc;
+ struct timespec ts;
+ struct timex tx;
+
+ static timer_t timerid;
+ struct itimerspec timeout;
+ struct sigevent sigevent;
+
+ struct ptp_clock_time *pct;
+ struct ptp_sys_offset *sysoff;
+
+
+ char *progname;
+ unsigned int i;
+ int c, cnt, fd;
+
+ char *device = DEVICE;
+ clockid_t clkid;
+ int adjfreq = 0x7fffffff;
+ int adjtime = 0;
+ int capabilities = 0;
+ int extts = 0;
+ int gettime = 0;
+ int index = 0;
+ int list_pins = 0;
+ int oneshot = 0;
+ int pct_offset = 0;
+ int n_samples = 0;
+ int periodic = 0;
+ int perout = -1;
+ int pin_index = -1, pin_func;
+ int pps = -1;
+ int seconds = 0;
+ int settime = 0;
+
+ int64_t t1, t2, tp;
+ int64_t interval, offset;
+
+ progname = strrchr(argv[0], '/');
+ progname = progname ? 1+progname : argv[0];
+ while (EOF != (c = getopt(argc, argv, "a:A:cd:e:f:ghi:k:lL:p:P:sSt:T:v"))) {
+ switch (c) {
+ case 'a':
+ oneshot = atoi(optarg);
+ break;
+ case 'A':
+ periodic = atoi(optarg);
+ break;
+ case 'c':
+ capabilities = 1;
+ break;
+ case 'd':
+ device = optarg;
+ break;
+ case 'e':
+ extts = atoi(optarg);
+ break;
+ case 'f':
+ adjfreq = atoi(optarg);
+ break;
+ case 'g':
+ gettime = 1;
+ break;
+ case 'i':
+ index = atoi(optarg);
+ break;
+ case 'k':
+ pct_offset = 1;
+ n_samples = atoi(optarg);
+ break;
+ case 'l':
+ list_pins = 1;
+ break;
+ case 'L':
+ cnt = sscanf(optarg, "%d,%d", &pin_index, &pin_func);
+ if (cnt != 2) {
+ usage(progname);
+ return -1;
+ }
+ break;
+ case 'p':
+ perout = atoi(optarg);
+ break;
+ case 'P':
+ pps = atoi(optarg);
+ break;
+ case 's':
+ settime = 1;
+ break;
+ case 'S':
+ settime = 2;
+ break;
+ case 't':
+ adjtime = atoi(optarg);
+ break;
+ case 'T':
+ settime = 3;
+ seconds = atoi(optarg);
+ break;
+ case 'h':
+ usage(progname);
+ return 0;
+ case '?':
+ default:
+ usage(progname);
+ return -1;
+ }
+ }
+
+ fd = open(device, O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "opening %s: %s\n", device, strerror(errno));
+ return -1;
+ }
+
+ clkid = get_clockid(fd);
+ if (CLOCK_INVALID == clkid) {
+ fprintf(stderr, "failed to read clock id\n");
+ return -1;
+ }
+
+ if (capabilities) {
+ if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
+ perror("PTP_CLOCK_GETCAPS");
+ } else {
+ printf("capabilities:\n"
+ " %d maximum frequency adjustment (ppb)\n"
+ " %d programmable alarms\n"
+ " %d external time stamp channels\n"
+ " %d programmable periodic signals\n"
+ " %d pulse per second\n"
+ " %d programmable pins\n"
+ " %d cross timestamping\n",
+ caps.max_adj,
+ caps.n_alarm,
+ caps.n_ext_ts,
+ caps.n_per_out,
+ caps.pps,
+ caps.n_pins,
+ caps.cross_timestamping);
+ }
+ }
+
+ if (0x7fffffff != adjfreq) {
+ memset(&tx, 0, sizeof(tx));
+ tx.modes = ADJ_FREQUENCY;
+ tx.freq = ppb_to_scaled_ppm(adjfreq);
+ if (clock_adjtime(clkid, &tx)) {
+ perror("clock_adjtime");
+ } else {
+ puts("frequency adjustment okay");
+ }
+ }
+
+ if (adjtime) {
+ memset(&tx, 0, sizeof(tx));
+ tx.modes = ADJ_SETOFFSET;
+ tx.time.tv_sec = adjtime;
+ tx.time.tv_usec = 0;
+ if (clock_adjtime(clkid, &tx) < 0) {
+ perror("clock_adjtime");
+ } else {
+ puts("time shift okay");
+ }
+ }
+
+ if (gettime) {
+ if (clock_gettime(clkid, &ts)) {
+ perror("clock_gettime");
+ } else {
+ printf("clock time: %ld.%09ld or %s",
+ ts.tv_sec, ts.tv_nsec, ctime(&ts.tv_sec));
+ }
+ }
+
+ if (settime == 1) {
+ clock_gettime(CLOCK_REALTIME, &ts);
+ if (clock_settime(clkid, &ts)) {
+ perror("clock_settime");
+ } else {
+ puts("set time okay");
+ }
+ }
+
+ if (settime == 2) {
+ clock_gettime(clkid, &ts);
+ if (clock_settime(CLOCK_REALTIME, &ts)) {
+ perror("clock_settime");
+ } else {
+ puts("set time okay");
+ }
+ }
+
+ if (settime == 3) {
+ ts.tv_sec = seconds;
+ ts.tv_nsec = 0;
+ if (clock_settime(clkid, &ts)) {
+ perror("clock_settime");
+ } else {
+ puts("set time okay");
+ }
+ }
+
+ if (extts) {
+ memset(&extts_request, 0, sizeof(extts_request));
+ extts_request.index = index;
+ extts_request.flags = PTP_ENABLE_FEATURE;
+ if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
+ perror("PTP_EXTTS_REQUEST");
+ extts = 0;
+ } else {
+ puts("external time stamp request okay");
+ }
+ for (; extts; extts--) {
+ cnt = read(fd, &event, sizeof(event));
+ if (cnt != sizeof(event)) {
+ perror("read");
+ break;
+ }
+ printf("event index %u at %lld.%09u\n", event.index,
+ event.t.sec, event.t.nsec);
+ fflush(stdout);
+ }
+ /* Disable the feature again. */
+ extts_request.flags = 0;
+ if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
+ perror("PTP_EXTTS_REQUEST");
+ }
+ }
+
+ if (list_pins) {
+ int n_pins = 0;
+ if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
+ perror("PTP_CLOCK_GETCAPS");
+ } else {
+ n_pins = caps.n_pins;
+ }
+ for (i = 0; i < n_pins; i++) {
+ desc.index = i;
+ if (ioctl(fd, PTP_PIN_GETFUNC, &desc)) {
+ perror("PTP_PIN_GETFUNC");
+ break;
+ }
+ printf("name %s index %u func %u chan %u\n",
+ desc.name, desc.index, desc.func, desc.chan);
+ }
+ }
+
+ if (oneshot) {
+ install_handler(SIGALRM, handle_alarm);
+ /* Create a timer. */
+ sigevent.sigev_notify = SIGEV_SIGNAL;
+ sigevent.sigev_signo = SIGALRM;
+ if (timer_create(clkid, &sigevent, &timerid)) {
+ perror("timer_create");
+ return -1;
+ }
+ /* Start the timer. */
+ memset(&timeout, 0, sizeof(timeout));
+ timeout.it_value.tv_sec = oneshot;
+ if (timer_settime(timerid, 0, &timeout, NULL)) {
+ perror("timer_settime");
+ return -1;
+ }
+ pause();
+ timer_delete(timerid);
+ }
+
+ if (periodic) {
+ install_handler(SIGALRM, handle_alarm);
+ /* Create a timer. */
+ sigevent.sigev_notify = SIGEV_SIGNAL;
+ sigevent.sigev_signo = SIGALRM;
+ if (timer_create(clkid, &sigevent, &timerid)) {
+ perror("timer_create");
+ return -1;
+ }
+ /* Start the timer. */
+ memset(&timeout, 0, sizeof(timeout));
+ timeout.it_interval.tv_sec = periodic;
+ timeout.it_value.tv_sec = periodic;
+ if (timer_settime(timerid, 0, &timeout, NULL)) {
+ perror("timer_settime");
+ return -1;
+ }
+ while (1) {
+ pause();
+ }
+ timer_delete(timerid);
+ }
+
+ if (perout >= 0) {
+ if (clock_gettime(clkid, &ts)) {
+ perror("clock_gettime");
+ return -1;
+ }
+ memset(&perout_request, 0, sizeof(perout_request));
+ perout_request.index = index;
+ perout_request.start.sec = ts.tv_sec + 2;
+ perout_request.start.nsec = 0;
+ perout_request.period.sec = 0;
+ perout_request.period.nsec = perout;
+ if (ioctl(fd, PTP_PEROUT_REQUEST, &perout_request)) {
+ perror("PTP_PEROUT_REQUEST");
+ } else {
+ puts("periodic output request okay");
+ }
+ }
+
+ if (pin_index >= 0) {
+ memset(&desc, 0, sizeof(desc));
+ desc.index = pin_index;
+ desc.func = pin_func;
+ desc.chan = index;
+ if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
+ perror("PTP_PIN_SETFUNC");
+ } else {
+ puts("set pin function okay");
+ }
+ }
+
+ if (pps != -1) {
+ int enable = pps ? 1 : 0;
+ if (ioctl(fd, PTP_ENABLE_PPS, enable)) {
+ perror("PTP_ENABLE_PPS");
+ } else {
+ puts("pps for system time request okay");
+ }
+ }
+
+ if (pct_offset) {
+ if (n_samples <= 0 || n_samples > 25) {
+ puts("n_samples should be between 1 and 25");
+ usage(progname);
+ return -1;
+ }
+
+ sysoff = calloc(1, sizeof(*sysoff));
+ if (!sysoff) {
+ perror("calloc");
+ return -1;
+ }
+ sysoff->n_samples = n_samples;
+
+ if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
+ perror("PTP_SYS_OFFSET");
+ else
+ puts("system and phc clock time offset request okay");
+
+ pct = &sysoff->ts[0];
+ for (i = 0; i < sysoff->n_samples; i++) {
+ t1 = pctns(pct+2*i);
+ tp = pctns(pct+2*i+1);
+ t2 = pctns(pct+2*i+2);
+ interval = t2 - t1;
+ offset = (t2 + t1) / 2 - tp;
+
+ printf("system time: %lld.%u\n",
+ (pct+2*i)->sec, (pct+2*i)->nsec);
+ printf("phc time: %lld.%u\n",
+ (pct+2*i+1)->sec, (pct+2*i+1)->nsec);
+ printf("system time: %lld.%u\n",
+ (pct+2*i+2)->sec, (pct+2*i+2)->nsec);
+ printf("system/phc clock time offset is %" PRId64 " ns\n"
+ "system clock time delay is %" PRId64 " ns\n",
+ offset, interval);
+ }
+
+ free(sysoff);
+ }
+
+ close(fd);
+ return 0;
+}
diff --git a/tools/testing/selftests/ptp/testptp.mk b/tools/testing/selftests/ptp/testptp.mk
new file mode 100644
index 0000000..4ef2d97
--- /dev/null
+++ b/tools/testing/selftests/ptp/testptp.mk
@@ -0,0 +1,33 @@
+# PTP 1588 clock support - User space test program
+#
+# Copyright (C) 2010 OMICRON electronics GmbH
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+CC = $(CROSS_COMPILE)gcc
+INC = -I$(KBUILD_OUTPUT)/usr/include
+CFLAGS = -Wall $(INC)
+LDLIBS = -lrt
+PROGS = testptp
+
+all: $(PROGS)
+
+testptp: testptp.o
+
+clean:
+ rm -f testptp.o
+
+distclean: clean
+ rm -f $(PROGS)
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* Re: [PATCH 6/9] selftests: move ptp tests from Documentation/ptp
2016-09-09 22:22 ` [PATCH 6/9] selftests: move ptp tests from Documentation/ptp Shuah Khan
@ 2016-09-10 0:07 ` kbuild test robot
0 siblings, 0 replies; 23+ messages in thread
From: kbuild test robot @ 2016-09-10 0:07 UTC (permalink / raw)
To: Shuah Khan
Cc: kbuild-all, corbet, richardcochran, Shuah Khan, linux-doc,
linux-kernel, netdev, linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 2282 bytes --]
Hi Shuah,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc5 next-20160909]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Shuah-Khan/Move-runnable-code-tests-from-Documentation-to-selftests/20160910-063538
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
>> scripts/Makefile.build:44: Documentation/ptp/Makefile: No such file or directory
>> make[3]: *** No rule to make target 'Documentation/ptp/Makefile'.
make[3]: Failed to remake makefile 'Documentation/ptp/Makefile'.
vim +44 scripts/Makefile.build
3156fd052 Robert P. J. Day 2008-02-18 38 # For backward compatibility check that these variables do not change
0c53c8e6e Sam Ravnborg 2007-10-14 39 save-cflags := $(CFLAGS)
0c53c8e6e Sam Ravnborg 2007-10-14 40
2a6914703 Sam Ravnborg 2005-07-25 41 # The filename Kbuild has precedence over Makefile
db8c1a7b2 Sam Ravnborg 2005-07-27 42 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
0c53c8e6e Sam Ravnborg 2007-10-14 43 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
0c53c8e6e Sam Ravnborg 2007-10-14 @44 include $(kbuild-file)
^1da177e4 Linus Torvalds 2005-04-16 45
0c53c8e6e Sam Ravnborg 2007-10-14 46 # If the save-* variables changed error out
0c53c8e6e Sam Ravnborg 2007-10-14 47 ifeq ($(KBUILD_NOPEDANTIC),)
:::::: The code at line 44 was first introduced by commit
:::::: 0c53c8e6eb456cde30f2305421c605713856abc8 kbuild: check for wrong use of CFLAGS
:::::: TO: Sam Ravnborg <sam@neptun.(none)>
:::::: CC: Sam Ravnborg <sam@neptun.(none)>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 6336 bytes --]
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 7/9] selftests: Update ptp Makefile to work under selftests
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (5 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 6/9] selftests: move ptp tests from Documentation/ptp Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-10 13:32 ` Sergei Shtylyov
2016-09-09 22:22 ` [PATCH 8/9] selftests: move vDSO tests from Documentation/vDSO Shuah Khan
` (2 subsequent siblings)
9 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Update ptp Makefile to work under selftests. ptp will not be run as part
of selftests suite and will not included in install targets. They can be
built separately for now.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/testing/selftests/ptp/Makefile | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/ptp/Makefile b/tools/testing/selftests/ptp/Makefile
index 293d6c0..f4a7238 100644
--- a/tools/testing/selftests/ptp/Makefile
+++ b/tools/testing/selftests/ptp/Makefile
@@ -1,8 +1,8 @@
-# List of programs to build
-hostprogs-y := testptp
+TEST_PROGS := testptp
+LDLIBS += -lrt
+all: $(TEST_PROGS)
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
+include ../lib.mk
-HOSTCFLAGS_testptp.o += -I$(objtree)/usr/include
-HOSTLOADLIBES_testptp := -lrt
+clean:
+ rm -fr testptp
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* [PATCH 8/9] selftests: move vDSO tests from Documentation/vDSO
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (6 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 7/9] selftests: Update ptp Makefile to work under selftests Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-10 0:46 ` kbuild test robot
2016-09-09 22:22 ` [PATCH 9/9] selftests: Update vDSO Makefile to work under selftests Shuah Khan
2016-09-10 7:01 ` [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Jonathan Corbet
9 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Move vDSO tests from Documentation/vDSO to selftests/vDSO.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
Documentation/vDSO/.gitignore | 2 -
Documentation/vDSO/Makefile | 17 --
Documentation/vDSO/parse_vdso.c | 269 ---------------------
Documentation/vDSO/vdso_standalone_test_x86.c | 128 ----------
Documentation/vDSO/vdso_test.c | 52 ----
tools/testing/selftests/vDSO/.gitignore | 2 +
tools/testing/selftests/vDSO/Makefile | 17 ++
tools/testing/selftests/vDSO/parse_vdso.c | 269 +++++++++++++++++++++
.../selftests/vDSO/vdso_standalone_test_x86.c | 128 ++++++++++
tools/testing/selftests/vDSO/vdso_test.c | 52 ++++
10 files changed, 468 insertions(+), 468 deletions(-)
delete mode 100644 Documentation/vDSO/.gitignore
delete mode 100644 Documentation/vDSO/Makefile
delete mode 100644 Documentation/vDSO/parse_vdso.c
delete mode 100644 Documentation/vDSO/vdso_standalone_test_x86.c
delete mode 100644 Documentation/vDSO/vdso_test.c
create mode 100644 tools/testing/selftests/vDSO/.gitignore
create mode 100644 tools/testing/selftests/vDSO/Makefile
create mode 100644 tools/testing/selftests/vDSO/parse_vdso.c
create mode 100644 tools/testing/selftests/vDSO/vdso_standalone_test_x86.c
create mode 100644 tools/testing/selftests/vDSO/vdso_test.c
diff --git a/Documentation/vDSO/.gitignore b/Documentation/vDSO/.gitignore
deleted file mode 100644
index 133bf9e..0000000
--- a/Documentation/vDSO/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-vdso_test
-vdso_standalone_test_x86
diff --git a/Documentation/vDSO/Makefile b/Documentation/vDSO/Makefile
deleted file mode 100644
index b12e987..0000000
--- a/Documentation/vDSO/Makefile
+++ /dev/null
@@ -1,17 +0,0 @@
-ifndef CROSS_COMPILE
-# vdso_test won't build for glibc < 2.16, so disable it
-# hostprogs-y := vdso_test
-hostprogs-$(CONFIG_X86) := vdso_standalone_test_x86
-vdso_standalone_test_x86-objs := vdso_standalone_test_x86.o parse_vdso.o
-vdso_test-objs := parse_vdso.o vdso_test.o
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS := -I$(objtree)/usr/include -std=gnu99
-HOSTCFLAGS_vdso_standalone_test_x86.o := -fno-asynchronous-unwind-tables -fno-stack-protector
-HOSTLOADLIBES_vdso_standalone_test_x86 := -nostdlib
-ifeq ($(CONFIG_X86_32),y)
-HOSTLOADLIBES_vdso_standalone_test_x86 += -lgcc_s
-endif
-endif
diff --git a/Documentation/vDSO/parse_vdso.c b/Documentation/vDSO/parse_vdso.c
deleted file mode 100644
index 1dbb4b8..0000000
--- a/Documentation/vDSO/parse_vdso.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * parse_vdso.c: Linux reference vDSO parser
- * Written by Andrew Lutomirski, 2011-2014.
- *
- * This code is meant to be linked in to various programs that run on Linux.
- * As such, it is available with as few restrictions as possible. This file
- * is licensed under the Creative Commons Zero License, version 1.0,
- * available at http://creativecommons.org/publicdomain/zero/1.0/legalcode
- *
- * The vDSO is a regular ELF DSO that the kernel maps into user space when
- * it starts a program. It works equally well in statically and dynamically
- * linked binaries.
- *
- * This code is tested on x86. In principle it should work on any
- * architecture that has a vDSO.
- */
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <string.h>
-#include <limits.h>
-#include <elf.h>
-
-/*
- * To use this vDSO parser, first call one of the vdso_init_* functions.
- * If you've already parsed auxv, then pass the value of AT_SYSINFO_EHDR
- * to vdso_init_from_sysinfo_ehdr. Otherwise pass auxv to vdso_init_from_auxv.
- * Then call vdso_sym for each symbol you want. For example, to look up
- * gettimeofday on x86_64, use:
- *
- * <some pointer> = vdso_sym("LINUX_2.6", "gettimeofday");
- * or
- * <some pointer> = vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
- *
- * vdso_sym will return 0 if the symbol doesn't exist or if the init function
- * failed or was not called. vdso_sym is a little slow, so its return value
- * should be cached.
- *
- * vdso_sym is threadsafe; the init functions are not.
- *
- * These are the prototypes:
- */
-extern void vdso_init_from_auxv(void *auxv);
-extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
-extern void *vdso_sym(const char *version, const char *name);
-
-
-/* And here's the code. */
-#ifndef ELF_BITS
-# if ULONG_MAX > 0xffffffffUL
-# define ELF_BITS 64
-# else
-# define ELF_BITS 32
-# endif
-#endif
-
-#define ELF_BITS_XFORM2(bits, x) Elf##bits##_##x
-#define ELF_BITS_XFORM(bits, x) ELF_BITS_XFORM2(bits, x)
-#define ELF(x) ELF_BITS_XFORM(ELF_BITS, x)
-
-static struct vdso_info
-{
- bool valid;
-
- /* Load information */
- uintptr_t load_addr;
- uintptr_t load_offset; /* load_addr - recorded vaddr */
-
- /* Symbol table */
- ELF(Sym) *symtab;
- const char *symstrings;
- ELF(Word) *bucket, *chain;
- ELF(Word) nbucket, nchain;
-
- /* Version table */
- ELF(Versym) *versym;
- ELF(Verdef) *verdef;
-} vdso_info;
-
-/* Straight from the ELF specification. */
-static unsigned long elf_hash(const unsigned char *name)
-{
- unsigned long h = 0, g;
- while (*name)
- {
- h = (h << 4) + *name++;
- if (g = h & 0xf0000000)
- h ^= g >> 24;
- h &= ~g;
- }
- return h;
-}
-
-void vdso_init_from_sysinfo_ehdr(uintptr_t base)
-{
- size_t i;
- bool found_vaddr = false;
-
- vdso_info.valid = false;
-
- vdso_info.load_addr = base;
-
- ELF(Ehdr) *hdr = (ELF(Ehdr)*)base;
- if (hdr->e_ident[EI_CLASS] !=
- (ELF_BITS == 32 ? ELFCLASS32 : ELFCLASS64)) {
- return; /* Wrong ELF class -- check ELF_BITS */
- }
-
- ELF(Phdr) *pt = (ELF(Phdr)*)(vdso_info.load_addr + hdr->e_phoff);
- ELF(Dyn) *dyn = 0;
-
- /*
- * We need two things from the segment table: the load offset
- * and the dynamic table.
- */
- for (i = 0; i < hdr->e_phnum; i++)
- {
- if (pt[i].p_type == PT_LOAD && !found_vaddr) {
- found_vaddr = true;
- vdso_info.load_offset = base
- + (uintptr_t)pt[i].p_offset
- - (uintptr_t)pt[i].p_vaddr;
- } else if (pt[i].p_type == PT_DYNAMIC) {
- dyn = (ELF(Dyn)*)(base + pt[i].p_offset);
- }
- }
-
- if (!found_vaddr || !dyn)
- return; /* Failed */
-
- /*
- * Fish out the useful bits of the dynamic table.
- */
- ELF(Word) *hash = 0;
- vdso_info.symstrings = 0;
- vdso_info.symtab = 0;
- vdso_info.versym = 0;
- vdso_info.verdef = 0;
- for (i = 0; dyn[i].d_tag != DT_NULL; i++) {
- switch (dyn[i].d_tag) {
- case DT_STRTAB:
- vdso_info.symstrings = (const char *)
- ((uintptr_t)dyn[i].d_un.d_ptr
- + vdso_info.load_offset);
- break;
- case DT_SYMTAB:
- vdso_info.symtab = (ELF(Sym) *)
- ((uintptr_t)dyn[i].d_un.d_ptr
- + vdso_info.load_offset);
- break;
- case DT_HASH:
- hash = (ELF(Word) *)
- ((uintptr_t)dyn[i].d_un.d_ptr
- + vdso_info.load_offset);
- break;
- case DT_VERSYM:
- vdso_info.versym = (ELF(Versym) *)
- ((uintptr_t)dyn[i].d_un.d_ptr
- + vdso_info.load_offset);
- break;
- case DT_VERDEF:
- vdso_info.verdef = (ELF(Verdef) *)
- ((uintptr_t)dyn[i].d_un.d_ptr
- + vdso_info.load_offset);
- break;
- }
- }
- if (!vdso_info.symstrings || !vdso_info.symtab || !hash)
- return; /* Failed */
-
- if (!vdso_info.verdef)
- vdso_info.versym = 0;
-
- /* Parse the hash table header. */
- vdso_info.nbucket = hash[0];
- vdso_info.nchain = hash[1];
- vdso_info.bucket = &hash[2];
- vdso_info.chain = &hash[vdso_info.nbucket + 2];
-
- /* That's all we need. */
- vdso_info.valid = true;
-}
-
-static bool vdso_match_version(ELF(Versym) ver,
- const char *name, ELF(Word) hash)
-{
- /*
- * This is a helper function to check if the version indexed by
- * ver matches name (which hashes to hash).
- *
- * The version definition table is a mess, and I don't know how
- * to do this in better than linear time without allocating memory
- * to build an index. I also don't know why the table has
- * variable size entries in the first place.
- *
- * For added fun, I can't find a comprehensible specification of how
- * to parse all the weird flags in the table.
- *
- * So I just parse the whole table every time.
- */
-
- /* First step: find the version definition */
- ver &= 0x7fff; /* Apparently bit 15 means "hidden" */
- ELF(Verdef) *def = vdso_info.verdef;
- while(true) {
- if ((def->vd_flags & VER_FLG_BASE) == 0
- && (def->vd_ndx & 0x7fff) == ver)
- break;
-
- if (def->vd_next == 0)
- return false; /* No definition. */
-
- def = (ELF(Verdef) *)((char *)def + def->vd_next);
- }
-
- /* Now figure out whether it matches. */
- ELF(Verdaux) *aux = (ELF(Verdaux)*)((char *)def + def->vd_aux);
- return def->vd_hash == hash
- && !strcmp(name, vdso_info.symstrings + aux->vda_name);
-}
-
-void *vdso_sym(const char *version, const char *name)
-{
- unsigned long ver_hash;
- if (!vdso_info.valid)
- return 0;
-
- ver_hash = elf_hash(version);
- ELF(Word) chain = vdso_info.bucket[elf_hash(name) % vdso_info.nbucket];
-
- for (; chain != STN_UNDEF; chain = vdso_info.chain[chain]) {
- ELF(Sym) *sym = &vdso_info.symtab[chain];
-
- /* Check for a defined global or weak function w/ right name. */
- if (ELF64_ST_TYPE(sym->st_info) != STT_FUNC)
- continue;
- if (ELF64_ST_BIND(sym->st_info) != STB_GLOBAL &&
- ELF64_ST_BIND(sym->st_info) != STB_WEAK)
- continue;
- if (sym->st_shndx == SHN_UNDEF)
- continue;
- if (strcmp(name, vdso_info.symstrings + sym->st_name))
- continue;
-
- /* Check symbol version. */
- if (vdso_info.versym
- && !vdso_match_version(vdso_info.versym[chain],
- version, ver_hash))
- continue;
-
- return (void *)(vdso_info.load_offset + sym->st_value);
- }
-
- return 0;
-}
-
-void vdso_init_from_auxv(void *auxv)
-{
- ELF(auxv_t) *elf_auxv = auxv;
- for (int i = 0; elf_auxv[i].a_type != AT_NULL; i++)
- {
- if (elf_auxv[i].a_type == AT_SYSINFO_EHDR) {
- vdso_init_from_sysinfo_ehdr(elf_auxv[i].a_un.a_val);
- return;
- }
- }
-
- vdso_info.valid = false;
-}
diff --git a/Documentation/vDSO/vdso_standalone_test_x86.c b/Documentation/vDSO/vdso_standalone_test_x86.c
deleted file mode 100644
index 93b0ebf..0000000
--- a/Documentation/vDSO/vdso_standalone_test_x86.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * vdso_test.c: Sample code to test parse_vdso.c on x86
- * Copyright (c) 2011-2014 Andy Lutomirski
- * Subject to the GNU General Public License, version 2
- *
- * You can amuse yourself by compiling with:
- * gcc -std=gnu99 -nostdlib
- * -Os -fno-asynchronous-unwind-tables -flto -lgcc_s
- * vdso_standalone_test_x86.c parse_vdso.c
- * to generate a small binary. On x86_64, you can omit -lgcc_s
- * if you want the binary to be completely standalone.
- */
-
-#include <sys/syscall.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <stdint.h>
-
-extern void *vdso_sym(const char *version, const char *name);
-extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
-extern void vdso_init_from_auxv(void *auxv);
-
-/* We need a libc functions... */
-int strcmp(const char *a, const char *b)
-{
- /* This implementation is buggy: it never returns -1. */
- while (*a || *b) {
- if (*a != *b)
- return 1;
- if (*a == 0 || *b == 0)
- return 1;
- a++;
- b++;
- }
-
- return 0;
-}
-
-/* ...and two syscalls. This is x86-specific. */
-static inline long x86_syscall3(long nr, long a0, long a1, long a2)
-{
- long ret;
-#ifdef __x86_64__
- asm volatile ("syscall" : "=a" (ret) : "a" (nr),
- "D" (a0), "S" (a1), "d" (a2) :
- "cc", "memory", "rcx",
- "r8", "r9", "r10", "r11" );
-#else
- asm volatile ("int $0x80" : "=a" (ret) : "a" (nr),
- "b" (a0), "c" (a1), "d" (a2) :
- "cc", "memory" );
-#endif
- return ret;
-}
-
-static inline long linux_write(int fd, const void *data, size_t len)
-{
- return x86_syscall3(__NR_write, fd, (long)data, (long)len);
-}
-
-static inline void linux_exit(int code)
-{
- x86_syscall3(__NR_exit, code, 0, 0);
-}
-
-void to_base10(char *lastdig, time_t n)
-{
- while (n) {
- *lastdig = (n % 10) + '0';
- n /= 10;
- lastdig--;
- }
-}
-
-__attribute__((externally_visible)) void c_main(void **stack)
-{
- /* Parse the stack */
- long argc = (long)*stack;
- stack += argc + 2;
-
- /* Now we're pointing at the environment. Skip it. */
- while(*stack)
- stack++;
- stack++;
-
- /* Now we're pointing at auxv. Initialize the vDSO parser. */
- vdso_init_from_auxv((void *)stack);
-
- /* Find gettimeofday. */
- typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
- gtod_t gtod = (gtod_t)vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
-
- if (!gtod)
- linux_exit(1);
-
- struct timeval tv;
- long ret = gtod(&tv, 0);
-
- if (ret == 0) {
- char buf[] = "The time is .000000\n";
- to_base10(buf + 31, tv.tv_sec);
- to_base10(buf + 38, tv.tv_usec);
- linux_write(1, buf, sizeof(buf) - 1);
- } else {
- linux_exit(ret);
- }
-
- linux_exit(0);
-}
-
-/*
- * This is the real entry point. It passes the initial stack into
- * the C entry point.
- */
-asm (
- ".text\n"
- ".global _start\n"
- ".type _start,@function\n"
- "_start:\n\t"
-#ifdef __x86_64__
- "mov %rsp,%rdi\n\t"
- "jmp c_main"
-#else
- "push %esp\n\t"
- "call c_main\n\t"
- "int $3"
-#endif
- );
diff --git a/Documentation/vDSO/vdso_test.c b/Documentation/vDSO/vdso_test.c
deleted file mode 100644
index 8daeb7d7..0000000
--- a/Documentation/vDSO/vdso_test.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * vdso_test.c: Sample code to test parse_vdso.c
- * Copyright (c) 2014 Andy Lutomirski
- * Subject to the GNU General Public License, version 2
- *
- * Compile with:
- * gcc -std=gnu99 vdso_test.c parse_vdso.c
- *
- * Tested on x86, 32-bit and 64-bit. It may work on other architectures, too.
- */
-
-#include <stdint.h>
-#include <elf.h>
-#include <stdio.h>
-#include <sys/auxv.h>
-#include <sys/time.h>
-
-extern void *vdso_sym(const char *version, const char *name);
-extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
-extern void vdso_init_from_auxv(void *auxv);
-
-int main(int argc, char **argv)
-{
- unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
- if (!sysinfo_ehdr) {
- printf("AT_SYSINFO_EHDR is not present!\n");
- return 0;
- }
-
- vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
-
- /* Find gettimeofday. */
- typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
- gtod_t gtod = (gtod_t)vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
-
- if (!gtod) {
- printf("Could not find __vdso_gettimeofday\n");
- return 1;
- }
-
- struct timeval tv;
- long ret = gtod(&tv, 0);
-
- if (ret == 0) {
- printf("The time is %lld.%06lld\n",
- (long long)tv.tv_sec, (long long)tv.tv_usec);
- } else {
- printf("__vdso_gettimeofday failed\n");
- }
-
- return 0;
-}
diff --git a/tools/testing/selftests/vDSO/.gitignore b/tools/testing/selftests/vDSO/.gitignore
new file mode 100644
index 0000000..133bf9e
--- /dev/null
+++ b/tools/testing/selftests/vDSO/.gitignore
@@ -0,0 +1,2 @@
+vdso_test
+vdso_standalone_test_x86
diff --git a/tools/testing/selftests/vDSO/Makefile b/tools/testing/selftests/vDSO/Makefile
new file mode 100644
index 0000000..b12e987
--- /dev/null
+++ b/tools/testing/selftests/vDSO/Makefile
@@ -0,0 +1,17 @@
+ifndef CROSS_COMPILE
+# vdso_test won't build for glibc < 2.16, so disable it
+# hostprogs-y := vdso_test
+hostprogs-$(CONFIG_X86) := vdso_standalone_test_x86
+vdso_standalone_test_x86-objs := vdso_standalone_test_x86.o parse_vdso.o
+vdso_test-objs := parse_vdso.o vdso_test.o
+
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
+
+HOSTCFLAGS := -I$(objtree)/usr/include -std=gnu99
+HOSTCFLAGS_vdso_standalone_test_x86.o := -fno-asynchronous-unwind-tables -fno-stack-protector
+HOSTLOADLIBES_vdso_standalone_test_x86 := -nostdlib
+ifeq ($(CONFIG_X86_32),y)
+HOSTLOADLIBES_vdso_standalone_test_x86 += -lgcc_s
+endif
+endif
diff --git a/tools/testing/selftests/vDSO/parse_vdso.c b/tools/testing/selftests/vDSO/parse_vdso.c
new file mode 100644
index 0000000..1dbb4b8
--- /dev/null
+++ b/tools/testing/selftests/vDSO/parse_vdso.c
@@ -0,0 +1,269 @@
+/*
+ * parse_vdso.c: Linux reference vDSO parser
+ * Written by Andrew Lutomirski, 2011-2014.
+ *
+ * This code is meant to be linked in to various programs that run on Linux.
+ * As such, it is available with as few restrictions as possible. This file
+ * is licensed under the Creative Commons Zero License, version 1.0,
+ * available at http://creativecommons.org/publicdomain/zero/1.0/legalcode
+ *
+ * The vDSO is a regular ELF DSO that the kernel maps into user space when
+ * it starts a program. It works equally well in statically and dynamically
+ * linked binaries.
+ *
+ * This code is tested on x86. In principle it should work on any
+ * architecture that has a vDSO.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+#include <limits.h>
+#include <elf.h>
+
+/*
+ * To use this vDSO parser, first call one of the vdso_init_* functions.
+ * If you've already parsed auxv, then pass the value of AT_SYSINFO_EHDR
+ * to vdso_init_from_sysinfo_ehdr. Otherwise pass auxv to vdso_init_from_auxv.
+ * Then call vdso_sym for each symbol you want. For example, to look up
+ * gettimeofday on x86_64, use:
+ *
+ * <some pointer> = vdso_sym("LINUX_2.6", "gettimeofday");
+ * or
+ * <some pointer> = vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
+ *
+ * vdso_sym will return 0 if the symbol doesn't exist or if the init function
+ * failed or was not called. vdso_sym is a little slow, so its return value
+ * should be cached.
+ *
+ * vdso_sym is threadsafe; the init functions are not.
+ *
+ * These are the prototypes:
+ */
+extern void vdso_init_from_auxv(void *auxv);
+extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
+extern void *vdso_sym(const char *version, const char *name);
+
+
+/* And here's the code. */
+#ifndef ELF_BITS
+# if ULONG_MAX > 0xffffffffUL
+# define ELF_BITS 64
+# else
+# define ELF_BITS 32
+# endif
+#endif
+
+#define ELF_BITS_XFORM2(bits, x) Elf##bits##_##x
+#define ELF_BITS_XFORM(bits, x) ELF_BITS_XFORM2(bits, x)
+#define ELF(x) ELF_BITS_XFORM(ELF_BITS, x)
+
+static struct vdso_info
+{
+ bool valid;
+
+ /* Load information */
+ uintptr_t load_addr;
+ uintptr_t load_offset; /* load_addr - recorded vaddr */
+
+ /* Symbol table */
+ ELF(Sym) *symtab;
+ const char *symstrings;
+ ELF(Word) *bucket, *chain;
+ ELF(Word) nbucket, nchain;
+
+ /* Version table */
+ ELF(Versym) *versym;
+ ELF(Verdef) *verdef;
+} vdso_info;
+
+/* Straight from the ELF specification. */
+static unsigned long elf_hash(const unsigned char *name)
+{
+ unsigned long h = 0, g;
+ while (*name)
+ {
+ h = (h << 4) + *name++;
+ if (g = h & 0xf0000000)
+ h ^= g >> 24;
+ h &= ~g;
+ }
+ return h;
+}
+
+void vdso_init_from_sysinfo_ehdr(uintptr_t base)
+{
+ size_t i;
+ bool found_vaddr = false;
+
+ vdso_info.valid = false;
+
+ vdso_info.load_addr = base;
+
+ ELF(Ehdr) *hdr = (ELF(Ehdr)*)base;
+ if (hdr->e_ident[EI_CLASS] !=
+ (ELF_BITS == 32 ? ELFCLASS32 : ELFCLASS64)) {
+ return; /* Wrong ELF class -- check ELF_BITS */
+ }
+
+ ELF(Phdr) *pt = (ELF(Phdr)*)(vdso_info.load_addr + hdr->e_phoff);
+ ELF(Dyn) *dyn = 0;
+
+ /*
+ * We need two things from the segment table: the load offset
+ * and the dynamic table.
+ */
+ for (i = 0; i < hdr->e_phnum; i++)
+ {
+ if (pt[i].p_type == PT_LOAD && !found_vaddr) {
+ found_vaddr = true;
+ vdso_info.load_offset = base
+ + (uintptr_t)pt[i].p_offset
+ - (uintptr_t)pt[i].p_vaddr;
+ } else if (pt[i].p_type == PT_DYNAMIC) {
+ dyn = (ELF(Dyn)*)(base + pt[i].p_offset);
+ }
+ }
+
+ if (!found_vaddr || !dyn)
+ return; /* Failed */
+
+ /*
+ * Fish out the useful bits of the dynamic table.
+ */
+ ELF(Word) *hash = 0;
+ vdso_info.symstrings = 0;
+ vdso_info.symtab = 0;
+ vdso_info.versym = 0;
+ vdso_info.verdef = 0;
+ for (i = 0; dyn[i].d_tag != DT_NULL; i++) {
+ switch (dyn[i].d_tag) {
+ case DT_STRTAB:
+ vdso_info.symstrings = (const char *)
+ ((uintptr_t)dyn[i].d_un.d_ptr
+ + vdso_info.load_offset);
+ break;
+ case DT_SYMTAB:
+ vdso_info.symtab = (ELF(Sym) *)
+ ((uintptr_t)dyn[i].d_un.d_ptr
+ + vdso_info.load_offset);
+ break;
+ case DT_HASH:
+ hash = (ELF(Word) *)
+ ((uintptr_t)dyn[i].d_un.d_ptr
+ + vdso_info.load_offset);
+ break;
+ case DT_VERSYM:
+ vdso_info.versym = (ELF(Versym) *)
+ ((uintptr_t)dyn[i].d_un.d_ptr
+ + vdso_info.load_offset);
+ break;
+ case DT_VERDEF:
+ vdso_info.verdef = (ELF(Verdef) *)
+ ((uintptr_t)dyn[i].d_un.d_ptr
+ + vdso_info.load_offset);
+ break;
+ }
+ }
+ if (!vdso_info.symstrings || !vdso_info.symtab || !hash)
+ return; /* Failed */
+
+ if (!vdso_info.verdef)
+ vdso_info.versym = 0;
+
+ /* Parse the hash table header. */
+ vdso_info.nbucket = hash[0];
+ vdso_info.nchain = hash[1];
+ vdso_info.bucket = &hash[2];
+ vdso_info.chain = &hash[vdso_info.nbucket + 2];
+
+ /* That's all we need. */
+ vdso_info.valid = true;
+}
+
+static bool vdso_match_version(ELF(Versym) ver,
+ const char *name, ELF(Word) hash)
+{
+ /*
+ * This is a helper function to check if the version indexed by
+ * ver matches name (which hashes to hash).
+ *
+ * The version definition table is a mess, and I don't know how
+ * to do this in better than linear time without allocating memory
+ * to build an index. I also don't know why the table has
+ * variable size entries in the first place.
+ *
+ * For added fun, I can't find a comprehensible specification of how
+ * to parse all the weird flags in the table.
+ *
+ * So I just parse the whole table every time.
+ */
+
+ /* First step: find the version definition */
+ ver &= 0x7fff; /* Apparently bit 15 means "hidden" */
+ ELF(Verdef) *def = vdso_info.verdef;
+ while(true) {
+ if ((def->vd_flags & VER_FLG_BASE) == 0
+ && (def->vd_ndx & 0x7fff) == ver)
+ break;
+
+ if (def->vd_next == 0)
+ return false; /* No definition. */
+
+ def = (ELF(Verdef) *)((char *)def + def->vd_next);
+ }
+
+ /* Now figure out whether it matches. */
+ ELF(Verdaux) *aux = (ELF(Verdaux)*)((char *)def + def->vd_aux);
+ return def->vd_hash == hash
+ && !strcmp(name, vdso_info.symstrings + aux->vda_name);
+}
+
+void *vdso_sym(const char *version, const char *name)
+{
+ unsigned long ver_hash;
+ if (!vdso_info.valid)
+ return 0;
+
+ ver_hash = elf_hash(version);
+ ELF(Word) chain = vdso_info.bucket[elf_hash(name) % vdso_info.nbucket];
+
+ for (; chain != STN_UNDEF; chain = vdso_info.chain[chain]) {
+ ELF(Sym) *sym = &vdso_info.symtab[chain];
+
+ /* Check for a defined global or weak function w/ right name. */
+ if (ELF64_ST_TYPE(sym->st_info) != STT_FUNC)
+ continue;
+ if (ELF64_ST_BIND(sym->st_info) != STB_GLOBAL &&
+ ELF64_ST_BIND(sym->st_info) != STB_WEAK)
+ continue;
+ if (sym->st_shndx == SHN_UNDEF)
+ continue;
+ if (strcmp(name, vdso_info.symstrings + sym->st_name))
+ continue;
+
+ /* Check symbol version. */
+ if (vdso_info.versym
+ && !vdso_match_version(vdso_info.versym[chain],
+ version, ver_hash))
+ continue;
+
+ return (void *)(vdso_info.load_offset + sym->st_value);
+ }
+
+ return 0;
+}
+
+void vdso_init_from_auxv(void *auxv)
+{
+ ELF(auxv_t) *elf_auxv = auxv;
+ for (int i = 0; elf_auxv[i].a_type != AT_NULL; i++)
+ {
+ if (elf_auxv[i].a_type == AT_SYSINFO_EHDR) {
+ vdso_init_from_sysinfo_ehdr(elf_auxv[i].a_un.a_val);
+ return;
+ }
+ }
+
+ vdso_info.valid = false;
+}
diff --git a/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c b/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c
new file mode 100644
index 0000000..93b0ebf
--- /dev/null
+++ b/tools/testing/selftests/vDSO/vdso_standalone_test_x86.c
@@ -0,0 +1,128 @@
+/*
+ * vdso_test.c: Sample code to test parse_vdso.c on x86
+ * Copyright (c) 2011-2014 Andy Lutomirski
+ * Subject to the GNU General Public License, version 2
+ *
+ * You can amuse yourself by compiling with:
+ * gcc -std=gnu99 -nostdlib
+ * -Os -fno-asynchronous-unwind-tables -flto -lgcc_s
+ * vdso_standalone_test_x86.c parse_vdso.c
+ * to generate a small binary. On x86_64, you can omit -lgcc_s
+ * if you want the binary to be completely standalone.
+ */
+
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdint.h>
+
+extern void *vdso_sym(const char *version, const char *name);
+extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
+extern void vdso_init_from_auxv(void *auxv);
+
+/* We need a libc functions... */
+int strcmp(const char *a, const char *b)
+{
+ /* This implementation is buggy: it never returns -1. */
+ while (*a || *b) {
+ if (*a != *b)
+ return 1;
+ if (*a == 0 || *b == 0)
+ return 1;
+ a++;
+ b++;
+ }
+
+ return 0;
+}
+
+/* ...and two syscalls. This is x86-specific. */
+static inline long x86_syscall3(long nr, long a0, long a1, long a2)
+{
+ long ret;
+#ifdef __x86_64__
+ asm volatile ("syscall" : "=a" (ret) : "a" (nr),
+ "D" (a0), "S" (a1), "d" (a2) :
+ "cc", "memory", "rcx",
+ "r8", "r9", "r10", "r11" );
+#else
+ asm volatile ("int $0x80" : "=a" (ret) : "a" (nr),
+ "b" (a0), "c" (a1), "d" (a2) :
+ "cc", "memory" );
+#endif
+ return ret;
+}
+
+static inline long linux_write(int fd, const void *data, size_t len)
+{
+ return x86_syscall3(__NR_write, fd, (long)data, (long)len);
+}
+
+static inline void linux_exit(int code)
+{
+ x86_syscall3(__NR_exit, code, 0, 0);
+}
+
+void to_base10(char *lastdig, time_t n)
+{
+ while (n) {
+ *lastdig = (n % 10) + '0';
+ n /= 10;
+ lastdig--;
+ }
+}
+
+__attribute__((externally_visible)) void c_main(void **stack)
+{
+ /* Parse the stack */
+ long argc = (long)*stack;
+ stack += argc + 2;
+
+ /* Now we're pointing at the environment. Skip it. */
+ while(*stack)
+ stack++;
+ stack++;
+
+ /* Now we're pointing at auxv. Initialize the vDSO parser. */
+ vdso_init_from_auxv((void *)stack);
+
+ /* Find gettimeofday. */
+ typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
+ gtod_t gtod = (gtod_t)vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
+
+ if (!gtod)
+ linux_exit(1);
+
+ struct timeval tv;
+ long ret = gtod(&tv, 0);
+
+ if (ret == 0) {
+ char buf[] = "The time is .000000\n";
+ to_base10(buf + 31, tv.tv_sec);
+ to_base10(buf + 38, tv.tv_usec);
+ linux_write(1, buf, sizeof(buf) - 1);
+ } else {
+ linux_exit(ret);
+ }
+
+ linux_exit(0);
+}
+
+/*
+ * This is the real entry point. It passes the initial stack into
+ * the C entry point.
+ */
+asm (
+ ".text\n"
+ ".global _start\n"
+ ".type _start,@function\n"
+ "_start:\n\t"
+#ifdef __x86_64__
+ "mov %rsp,%rdi\n\t"
+ "jmp c_main"
+#else
+ "push %esp\n\t"
+ "call c_main\n\t"
+ "int $3"
+#endif
+ );
diff --git a/tools/testing/selftests/vDSO/vdso_test.c b/tools/testing/selftests/vDSO/vdso_test.c
new file mode 100644
index 0000000..8daeb7d7
--- /dev/null
+++ b/tools/testing/selftests/vDSO/vdso_test.c
@@ -0,0 +1,52 @@
+/*
+ * vdso_test.c: Sample code to test parse_vdso.c
+ * Copyright (c) 2014 Andy Lutomirski
+ * Subject to the GNU General Public License, version 2
+ *
+ * Compile with:
+ * gcc -std=gnu99 vdso_test.c parse_vdso.c
+ *
+ * Tested on x86, 32-bit and 64-bit. It may work on other architectures, too.
+ */
+
+#include <stdint.h>
+#include <elf.h>
+#include <stdio.h>
+#include <sys/auxv.h>
+#include <sys/time.h>
+
+extern void *vdso_sym(const char *version, const char *name);
+extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
+extern void vdso_init_from_auxv(void *auxv);
+
+int main(int argc, char **argv)
+{
+ unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
+ if (!sysinfo_ehdr) {
+ printf("AT_SYSINFO_EHDR is not present!\n");
+ return 0;
+ }
+
+ vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
+
+ /* Find gettimeofday. */
+ typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
+ gtod_t gtod = (gtod_t)vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
+
+ if (!gtod) {
+ printf("Could not find __vdso_gettimeofday\n");
+ return 1;
+ }
+
+ struct timeval tv;
+ long ret = gtod(&tv, 0);
+
+ if (ret == 0) {
+ printf("The time is %lld.%06lld\n",
+ (long long)tv.tv_sec, (long long)tv.tv_usec);
+ } else {
+ printf("__vdso_gettimeofday failed\n");
+ }
+
+ return 0;
+}
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* Re: [PATCH 8/9] selftests: move vDSO tests from Documentation/vDSO
2016-09-09 22:22 ` [PATCH 8/9] selftests: move vDSO tests from Documentation/vDSO Shuah Khan
@ 2016-09-10 0:46 ` kbuild test robot
0 siblings, 0 replies; 23+ messages in thread
From: kbuild test robot @ 2016-09-10 0:46 UTC (permalink / raw)
To: Shuah Khan
Cc: kbuild-all, corbet, richardcochran, Shuah Khan, linux-doc,
linux-kernel, netdev, linux-kselftest
[-- Attachment #1: Type: text/plain, Size: 3256 bytes --]
Hi Shuah,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc5 next-20160909]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Shuah-Khan/Move-runnable-code-tests-from-Documentation-to-selftests/20160910-063538
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
>> scripts/Makefile.build:44: Documentation/vDSO/Makefile: No such file or directory
>> make[3]: *** No rule to make target 'Documentation/vDSO/Makefile'.
make[3]: Failed to remake makefile 'Documentation/vDSO/Makefile'.
vim +44 scripts/Makefile.build
f77bf0142 Sam Ravnborg 2007-10-15 28 ldflags-y :=
d72e5edbf Sam Ravnborg 2007-05-28 29
720097d89 Sam Ravnborg 2009-04-19 30 subdir-asflags-y :=
720097d89 Sam Ravnborg 2009-04-19 31 subdir-ccflags-y :=
720097d89 Sam Ravnborg 2009-04-19 32
3156fd052 Robert P. J. Day 2008-02-18 33 # Read auto.conf if it exists, otherwise ignore
c955ccafc Roman Zippel 2006-06-08 34 -include include/config/auto.conf
^1da177e4 Linus Torvalds 2005-04-16 35
20a468b51 Sam Ravnborg 2006-01-22 36 include scripts/Kbuild.include
20a468b51 Sam Ravnborg 2006-01-22 37
3156fd052 Robert P. J. Day 2008-02-18 38 # For backward compatibility check that these variables do not change
0c53c8e6e Sam Ravnborg 2007-10-14 39 save-cflags := $(CFLAGS)
0c53c8e6e Sam Ravnborg 2007-10-14 40
2a6914703 Sam Ravnborg 2005-07-25 41 # The filename Kbuild has precedence over Makefile
db8c1a7b2 Sam Ravnborg 2005-07-27 42 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
0c53c8e6e Sam Ravnborg 2007-10-14 43 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
0c53c8e6e Sam Ravnborg 2007-10-14 @44 include $(kbuild-file)
^1da177e4 Linus Torvalds 2005-04-16 45
0c53c8e6e Sam Ravnborg 2007-10-14 46 # If the save-* variables changed error out
0c53c8e6e Sam Ravnborg 2007-10-14 47 ifeq ($(KBUILD_NOPEDANTIC),)
0c53c8e6e Sam Ravnborg 2007-10-14 48 ifneq ("$(save-cflags)","$(CFLAGS)")
49c57d254 Arnaud Lacombe 2011-08-15 49 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
0c53c8e6e Sam Ravnborg 2007-10-14 50 endif
0c53c8e6e Sam Ravnborg 2007-10-14 51 endif
4a5838ad9 Borislav Petkov 2011-03-01 52
:::::: The code at line 44 was first introduced by commit
:::::: 0c53c8e6eb456cde30f2305421c605713856abc8 kbuild: check for wrong use of CFLAGS
:::::: TO: Sam Ravnborg <sam@neptun.(none)>
:::::: CC: Sam Ravnborg <sam@neptun.(none)>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 6336 bytes --]
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 9/9] selftests: Update vDSO Makefile to work under selftests
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (7 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 8/9] selftests: move vDSO tests from Documentation/vDSO Shuah Khan
@ 2016-09-09 22:22 ` Shuah Khan
2016-09-10 13:33 ` Sergei Shtylyov
2016-09-10 7:01 ` [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Jonathan Corbet
9 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-09 22:22 UTC (permalink / raw)
To: corbet, richardcochran
Cc: Shuah Khan, linux-doc, linux-kernel, netdev, linux-kselftest
Update vDSO Makefile to work under selftests. vDSO will not be run as part
of selftests suite and will not included in install targets. They can be
built separately for now.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/testing/selftests/vDSO/Makefile | 29 ++++++++++++++++-------------
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/tools/testing/selftests/vDSO/Makefile b/tools/testing/selftests/vDSO/Makefile
index b12e987..706b68b 100644
--- a/tools/testing/selftests/vDSO/Makefile
+++ b/tools/testing/selftests/vDSO/Makefile
@@ -1,17 +1,20 @@
ifndef CROSS_COMPILE
-# vdso_test won't build for glibc < 2.16, so disable it
-# hostprogs-y := vdso_test
-hostprogs-$(CONFIG_X86) := vdso_standalone_test_x86
-vdso_standalone_test_x86-objs := vdso_standalone_test_x86.o parse_vdso.o
-vdso_test-objs := parse_vdso.o vdso_test.o
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS := -I$(objtree)/usr/include -std=gnu99
-HOSTCFLAGS_vdso_standalone_test_x86.o := -fno-asynchronous-unwind-tables -fno-stack-protector
-HOSTLOADLIBES_vdso_standalone_test_x86 := -nostdlib
+CFLAGS := -std=gnu99
+CFLAGS_vdso_standalone_test_x86 := -nostdlib -fno-asynchronous-unwind-tables -fno-stack-protector
ifeq ($(CONFIG_X86_32),y)
-HOSTLOADLIBES_vdso_standalone_test_x86 += -lgcc_s
+LDLIBS += -lgcc_s
endif
+
+TEST_PROGS := vdso_test vdso_standalone_test_x86
+
+all: $(TEST_PROGS)
+vdso_test: parse_vdso.c vdso_test.c
+vdso_standalone_test_x86: vdso_standalone_test_x86.c parse_vdso.c
+ $(CC) $(CFLAGS) $(CFLAGS_vdso_standalone_test_x86) \
+ vdso_standalone_test_x86.c parse_vdso.c \
+ -o vdso_standalone_test_x86
+
+include ../lib.mk
+clean:
+ rm -fr $(TEST_PROGS)
endif
--
2.7.4
^ permalink raw reply related [flat|nested] 23+ messages in thread* Re: [PATCH 0/9] Move runnable code (tests) from Documentation to selftests
2016-09-09 22:22 [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Shuah Khan
` (8 preceding siblings ...)
2016-09-09 22:22 ` [PATCH 9/9] selftests: Update vDSO Makefile to work under selftests Shuah Khan
@ 2016-09-10 7:01 ` Jonathan Corbet
2016-09-13 9:20 ` Jani Nikula
9 siblings, 1 reply; 23+ messages in thread
From: Jonathan Corbet @ 2016-09-10 7:01 UTC (permalink / raw)
To: Shuah Khan
Cc: richardcochran, linux-doc, linux-kernel, netdev, linux-kselftest
On Fri, 9 Sep 2016 16:22:41 -0600
Shuah Khan <shuahkh@osg.samsung.com> wrote:
> Move runnable code (tests) from Documentation to selftests and update
> Makefiles to work under selftests.
>
> Jon Corbet and I discussed this in an email thread and as per that
> discussion, this patch series moves all the tests that are under the
> Documentation directory to selftests. There is more runnable code in
> the form of examples and utils and that is going to be another patch
> series. I moved just the tests and left the documentation files as is.
I'm fine with the idea, but it looks like a couple of tweaks are needed,
in particular to avoid leaving behind dangling references in
Documentation/Makefile that cause build errors.
I think the individual patches probably need a wider CC list as well.
I'd use the get_maintainer script (or git) to see who has taken an
interest in the individual tests and make sure they are aware of the
move.
Thanks,
jon
^ permalink raw reply [flat|nested] 23+ messages in thread* Re: [PATCH 0/9] Move runnable code (tests) from Documentation to selftests
2016-09-10 7:01 ` [PATCH 0/9] Move runnable code (tests) from Documentation to selftests Jonathan Corbet
@ 2016-09-13 9:20 ` Jani Nikula
2016-09-13 13:25 ` Shuah Khan
0 siblings, 1 reply; 23+ messages in thread
From: Jani Nikula @ 2016-09-13 9:20 UTC (permalink / raw)
To: Jonathan Corbet, Shuah Khan
Cc: richardcochran, linux-doc, linux-kernel, netdev, linux-kselftest
On Sat, 10 Sep 2016, Jonathan Corbet <corbet@lwn.net> wrote:
> On Fri, 9 Sep 2016 16:22:41 -0600
> Shuah Khan <shuahkh@osg.samsung.com> wrote:
>
>> Move runnable code (tests) from Documentation to selftests and update
>> Makefiles to work under selftests.
>>
>> Jon Corbet and I discussed this in an email thread and as per that
>> discussion, this patch series moves all the tests that are under the
>> Documentation directory to selftests. There is more runnable code in
>> the form of examples and utils and that is going to be another patch
>> series. I moved just the tests and left the documentation files as is.
>
> I'm fine with the idea, but it looks like a couple of tweaks are needed,
> in particular to avoid leaving behind dangling references in
> Documentation/Makefile that cause build errors.
>
> I think the individual patches probably need a wider CC list as well.
> I'd use the get_maintainer script (or git) to see who has taken an
> interest in the individual tests and make sure they are aware of the
> move.
FWIW, I'm in favor of moving *all* the code away from Documentation, not
just tests. Essentially removing the CONFIG_BUILD_DOCSRC config option,
and reserving Documentation/Makefile for documentation build. After this
series, some of the remaining code belongs under samples, some under
tools.
We could make it possible to include the code samples from samples into
the Sphinx built documentation.
BR,
Jani.
--
Jani Nikula, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 0/9] Move runnable code (tests) from Documentation to selftests
2016-09-13 9:20 ` Jani Nikula
@ 2016-09-13 13:25 ` Shuah Khan
2016-09-13 13:45 ` Jani Nikula
0 siblings, 1 reply; 23+ messages in thread
From: Shuah Khan @ 2016-09-13 13:25 UTC (permalink / raw)
To: Jani Nikula, Jonathan Corbet
Cc: richardcochran, linux-doc, linux-kernel, netdev, linux-kselftest,
Shuah Khan
On 09/13/2016 03:20 AM, Jani Nikula wrote:
> On Sat, 10 Sep 2016, Jonathan Corbet <corbet@lwn.net> wrote:
>> On Fri, 9 Sep 2016 16:22:41 -0600
>> Shuah Khan <shuahkh@osg.samsung.com> wrote:
>>
>>> Move runnable code (tests) from Documentation to selftests and update
>>> Makefiles to work under selftests.
>>>
>>> Jon Corbet and I discussed this in an email thread and as per that
>>> discussion, this patch series moves all the tests that are under the
>>> Documentation directory to selftests. There is more runnable code in
>>> the form of examples and utils and that is going to be another patch
>>> series. I moved just the tests and left the documentation files as is.
>>
>> I'm fine with the idea, but it looks like a couple of tweaks are needed,
>> in particular to avoid leaving behind dangling references in
>> Documentation/Makefile that cause build errors.
>>
>> I think the individual patches probably need a wider CC list as well.
>> I'd use the get_maintainer script (or git) to see who has taken an
>> interest in the individual tests and make sure they are aware of the
>> move.
>
> FWIW, I'm in favor of moving *all* the code away from Documentation, not
> just tests. Essentially removing the CONFIG_BUILD_DOCSRC config option,
> and reserving Documentation/Makefile for documentation build. After this
> series, some of the remaining code belongs under samples, some under
> tools.
I am planning another patch series to move all the examples and samples
and tools to their right location.
>
> We could make it possible to include the code samples from samples into
> the Sphinx built documentation.
>
> BR,
> Jani.
>
I can't say I understand Sphinx, however, it might make sense to include
samples into Sphinx build. Is this approach different from the way they
are built under Documentation via Doc Makfiles now?
thanks,
-- Shuah
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 0/9] Move runnable code (tests) from Documentation to selftests
2016-09-13 13:25 ` Shuah Khan
@ 2016-09-13 13:45 ` Jani Nikula
0 siblings, 0 replies; 23+ messages in thread
From: Jani Nikula @ 2016-09-13 13:45 UTC (permalink / raw)
To: Shuah Khan, Jonathan Corbet
Cc: richardcochran, linux-doc, linux-kernel, netdev, linux-kselftest,
Shuah Khan, Markus Heiser
On Tue, 13 Sep 2016, Shuah Khan <shuahkh@osg.samsung.com> wrote:
> On 09/13/2016 03:20 AM, Jani Nikula wrote:
>> FWIW, I'm in favor of moving *all* the code away from Documentation, not
>> just tests. Essentially removing the CONFIG_BUILD_DOCSRC config option,
>> and reserving Documentation/Makefile for documentation build. After this
>> series, some of the remaining code belongs under samples, some under
>> tools.
>
> I am planning another patch series to move all the examples and samples
> and tools to their right location.
Great!
>> We could make it possible to include the code samples from samples into
>> the Sphinx built documentation.
>
> I can't say I understand Sphinx, however, it might make sense to include
> samples into Sphinx build. Is this approach different from the way they
> are built under Documentation via Doc Makfiles now?
It's just that by default Sphinx won't allow including files outside of
its root directory, which is Documentation in this case. It just needs
an extension for this.
BR,
Jani.
--
Jani Nikula, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 23+ messages in thread