* [Xenomai-help] shared library in xenomai ?
@ 2009-05-05 6:36 luan dinh
2009-05-05 7:55 ` Gilles Chanteperdrix
0 siblings, 1 reply; 6+ messages in thread
From: luan dinh @ 2009-05-05 6:36 UTC (permalink / raw)
To: Thomas Lockhart; +Cc: xenomai
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hi.
this is my problem :
i write a program which use raw socket and rteth0 NIC card to send data. when i build as application it run well. then i build this program as shared libarary named libctest.so support send() function to send data
the command to build shared lib similar to :
gcc -shared -Wl,-soname,libctest.so.1 -o libctest.so.1.0 *.o
mv libctest.so.1.0 /opt/lib
ln -sf /opt/lib/libctest.so.1.0 /opt/lib/libctest.so
ln -sf /opt/lib/libctest.so.1.0 /opt/lib/libctest.so.1
i write a TEST program use the send() function which supported by my library.
the command to build TEST program similar to :
gcc <xenomai options> prog.c -lctest -o TEST
when i execute by command ./TEST
the TEST program still run. the send() function seem to be right but no data sent to network adapter
Luan Dinh
Did you try running ldd on your built library to make sure that the
linking is finding all of the dependencies? Or please clarify what does
not seem to be working for you...
hth
- Tom
--
Thomas Lockhart
Supervisor, Distributed and Real-time Group
Instrument Software and Science Data Systems
Caltech/JPL
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xenomai-help] shared library in xenomai ?
2009-05-05 6:36 [Xenomai-help] shared library in xenomai ? luan dinh
@ 2009-05-05 7:55 ` Gilles Chanteperdrix
0 siblings, 0 replies; 6+ messages in thread
From: Gilles Chanteperdrix @ 2009-05-05 7:55 UTC (permalink / raw)
To: luan dinh; +Cc: xenomai
luan dinh wrote:
> hi.
> this is my problem :
> i write a program which use raw socket and rteth0 NIC card to send data. when i build as application it run well. then i build this program as shared libarary named libctest.so support send() function to send data
> the command to build shared lib similar to :
> gcc -shared -Wl,-soname,libctest.so.1 -o libctest.so.1.0 *.o
> mv libctest.so.1.0 /opt/lib
> ln -sf /opt/lib/libctest.so.1.0 /opt/lib/libctest.so
> ln -sf /opt/lib/libctest.so.1.0 /opt/lib/libctest.so.1
> i write a TEST program use the send() function which supported by my library.
> the command to build TEST program similar to :
> gcc <xenomai options> prog.c -lctest -o TEST
> when i execute by command ./TEST
> the TEST program still run. the send() function seem to be right but no data sent to network adapter
Please post an excerpt of your code exposing this issue (the library
part, and the program part).
You should note that compiling libraries or programs for Xenomai usually
involves compilation flags obtained with xeno-config.
You should also note that "send()" is a glibc function, so calling a
function with the same name is a bad idea.
--
Gilles.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xenomai-help] shared library in xenomai ?
2009-05-06 6:09 luan dinh
@ 2009-05-06 6:27 ` Gilles Chanteperdrix
0 siblings, 0 replies; 6+ messages in thread
From: Gilles Chanteperdrix @ 2009-05-06 6:27 UTC (permalink / raw)
To: luan dinh; +Cc: xenomai-help
luan dinh wrote:
> hi.
> My program included :
> + libsock.c
> + demo_use.c
> + Makefile
> i build libsock.c as shared library named libmylibra.so ( support my_send() function )
> demo_use.c use my_send() and built with -lmylibra option
> Thanks for any advise.
> Luan Dinh
> PS :i also attach the source code of these files
> ######### libsock. c###
> void demo(void *agr)
> {
> int len,i;
> rt_task_set_periodic(NULL, TM_NOW, 100000000);
> while (1) {
> rt_task_wait_period(NULL);
> len = send(sock, data, sizeof(data), 0);
> if (len < 0)
> {
> printf("Sent Failed...!\n");
> break;
> }
> }
> }
> /*my_send*/
> int my_send()
> {
> struct sched_param param;// = { .sched_priority = 1 };
> struct sockaddr_ll addr;
> struct ifreq ifr;
> mlockall(MCL_CURRENT|MCL_FUTURE);
> if ((sock = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
> perror("socket cannot be created");
> return 1;
> }
> strncpy(ifr.ifr_name, "rteth0", IFNAMSIZ);
> if (ioctl(sock, SIOCGIFINDEX, &ifr) < 0) {
> perror("cannot get interface index");
> close(sock);
> return 1;
> }
> addr.sll_family = AF_PACKET;
> addr.sll_protocol = htons(ETH_P_ALL);
> addr.sll_pkttype = PACKET_OTHERHOST;
> addr.sll_ifindex = ifr.ifr_ifindex;
>
> if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
> perror("cannot bind");
> close(sock);
> return 1;
> }
>
> rt_task_create(&demo_task, "mytask", 0, 99, 0);
> rt_task_start(&demo_task, &demo, NULL);
> return 1;
> }
>
> ### demo_use.c ###
> int main( int argc, char * argv[] )
> {
> my_send();
> pause();
> return 1;
> }
>
> ## Makefile ###
> CC = gcc
> AR = ar cru
> SOFLAGS = -shared -Wl
The -Wl means that you are going to pass a flag to the linker. So, this
declaration of SOFLAGS is a bit like a sentence which you started and
did not finish.
> CFLAGS = -I/usr/xenomai/include -I/usr/xenomai/include/posix -D_GNU_SOURCE -D_REENTRANT -D__XENO__ -Wall -g -fPIC -rdynamic -pipe -O2 -fstrict-aliasing
> LDFLAGS = -Wl,@/usr/xenomai/lib/posix.wrappers -L/usr/xenomai/lib -lpthread_rt -lpthread -lnative -lrt -lstdc++ -ldl
Bad. You should use xeno-config to obtain the CFLAGS and the LDFLAGS.
> LINKER = $(CC)
> LINT = lint -c
> RM = /bin/rm -f
> LIBOBJS = libsock.o
> TARGET = libmylibra.so \
> test
> all: $(TARGET)
> libmylibra.so: $(LIBOBJS)
> $(LINKER) $(SOFLAGS) -o $@ $^ -lc
As I told you in my previous mail, you should use LDFLAGS when linking
libmylibra.so.
Also, if you are working on an embedded system, it is a better idea to
use either the native skin or the posix skin, not use both. This way,
you can compile only one of the two skins in the kernel, and you put
only one of the two libraries on your system.
--
Gilles.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Xenomai-help] shared library in xenomai ?
@ 2009-05-06 6:09 luan dinh
2009-05-06 6:27 ` Gilles Chanteperdrix
0 siblings, 1 reply; 6+ messages in thread
From: luan dinh @ 2009-05-06 6:09 UTC (permalink / raw)
To: Gilles Chanteperdrix; +Cc: xenomai-help
[-- Attachment #1.1: Type: text/plain, Size: 2933 bytes --]
hi.
My program included :
+ libsock.c
+ demo_use.c
+ Makefile
i build libsock.c as shared library named libmylibra.so ( support my_send() function )
demo_use.c use my_send() and built with -lmylibra option
Thanks for any advise.
Luan Dinh
PS :i also attach the source code of these files
######### libsock. c###
void demo(void *agr)
{
int len,i;
rt_task_set_periodic(NULL, TM_NOW, 100000000);
while (1) {
rt_task_wait_period(NULL);
len = send(sock, data, sizeof(data), 0);
if (len < 0)
{
printf("Sent Failed...!\n");
break;
}
}
}
/*my_send*/
int my_send()
{
struct sched_param param;// = { .sched_priority = 1 };
struct sockaddr_ll addr;
struct ifreq ifr;
mlockall(MCL_CURRENT|MCL_FUTURE);
if ((sock = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
perror("socket cannot be created");
return 1;
}
strncpy(ifr.ifr_name, "rteth0", IFNAMSIZ);
if (ioctl(sock, SIOCGIFINDEX, &ifr) < 0) {
perror("cannot get interface index");
close(sock);
return 1;
}
addr.sll_family = AF_PACKET;
addr.sll_protocol = htons(ETH_P_ALL);
addr.sll_pkttype = PACKET_OTHERHOST;
addr.sll_ifindex = ifr.ifr_ifindex;
if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("cannot bind");
close(sock);
return 1;
}
rt_task_create(&demo_task, "mytask", 0, 99, 0);
rt_task_start(&demo_task, &demo, NULL);
return 1;
}
### demo_use.c ###
int main( int argc, char * argv[] )
{
my_send();
pause();
return 1;
}
## Makefile ###
CC = gcc
AR = ar cru
SOFLAGS = -shared -Wl
CFLAGS = -I/usr/xenomai/include -I/usr/xenomai/include/posix -D_GNU_SOURCE -D_REENTRANT -D__XENO__ -Wall -g -fPIC -rdynamic -pipe -O2 -fstrict-aliasing
LDFLAGS = -Wl,@/usr/xenomai/lib/posix.wrappers -L/usr/xenomai/lib -lpthread_rt -lpthread -lnative -lrt -lstdc++ -ldl
LINKER = $(CC)
LINT = lint -c
RM = /bin/rm -f
LIBOBJS = libsock.o
TARGET = libmylibra.so \
test
all: $(TARGET)
libmylibra.so: $(LIBOBJS)
$(LINKER) $(SOFLAGS) -o $@ $^ -lc
test: demo_use.o
$(LINKER) $(LDFLAGS) $^ -L. -lmylibra -o $@
clean:
@( $(RM) *.o vgcore.* core core.* $(TARGET) )
# make rule
%.o : %.cpp
$(CC) $(CFLAGS) -c $^ -o $@
Please post an excerpt of your code exposing this issue (the library
part, and the program part).
You should note that compiling libraries or programs for Xenomai usually
involves compilation flags obtained with xeno-config.
You should also note that "send()" is a glibc function, so calling a
function with the same name is a bad idea.
--
Gilles.
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[-- Attachment #2: libsock.c --]
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#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <native/task.h>
#include <native/timer.h>
#include <errno.h>
#include <pthread.h>
#include <string.h>
#include <netinet/ether.h>
#include "libsock.h"
unsigned char buffer[1514];
unsigned char data[60] =
{0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x64,0x67,0x69,0x73,0x6E,0x88,0xA4,0x21,0x10,
0x0C,0x00,0x00,0x00,0x01,0x00,0x07,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x30,0x01,0x02,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
int sock;
RT_TASK demo_task;
void sockprintf()
{
printf("this is Sockprintf...!\n");
}
void demo(void *agr)
{
int len,i;
rt_task_set_periodic(NULL, TM_NOW, 100000000);
while (1) {
rt_task_wait_period(NULL);
len = send(sock, data, sizeof(data), 0);
if (len < 0)
{
printf("Sent Failed...!\n");
break;
}
}
}
void catch_signal(int sig)
{
close(sock);
}
int my_send()
{
struct sched_param param;// = { .sched_priority = 1 };
struct sockaddr_ll addr;
struct ifreq ifr;
mlockall(MCL_CURRENT|MCL_FUTURE);
if ((sock = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
perror("socket cannot be created");
return 1;
}
strncpy(ifr.ifr_name, "rteth0", IFNAMSIZ);
if (ioctl(sock, SIOCGIFINDEX, &ifr) < 0) {
perror("cannot get interface index");
close(sock);
return 1;
}
addr.sll_family = AF_PACKET;
addr.sll_protocol = htons(ETH_P_ALL);
addr.sll_pkttype = PACKET_OTHERHOST;
addr.sll_ifindex = ifr.ifr_ifindex;
if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("cannot bind");
close(sock);
return 1;
}
rt_task_create(&demo_task, "mytask", 0, 99, 0);
rt_task_start(&demo_task, &demo, NULL);
pause();
rt_task_delete(&demo_task);
return 1;
}
[-- Attachment #3: demo_use.c --]
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#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <native/task.h>
#include <native/timer.h>
#include <errno.h>
#include <pthread.h>
#include <string.h>
#include <netinet/ether.h>
#include "testdom.hpp"
#include "libsock.h"
int main( int argc, char * argv[] )
{
my_send();
pause();
return 1;
}
[-- Attachment #4: Makefile --]
[-- Type: application/octet-stream, Size: 1165 bytes --]
CC = gcc
AR = ar cru
#CFLAGS = -Wall -D_REENTRANT -D_GNU_SOURCE -g -fPIC
SOFLAGS = -shared -Wl
#LDFLAGS = -lstdc++
CFLAGS = -I/usr/xenomai/include -I/usr/xenomai/include/posix -D_GNU_SOURCE -D_REENTRANT -D__XENO__ -Wall -g -fPIC -rdynamic -pipe -O2 -fstrict-aliasing
LDFLAGS = -Wl,@/usr/xenomai/lib/posix.wrappers -L/usr/xenomai/lib -lpthread_rt -lpthread -lnative -lrt -lstdc++ -ldl
LINKER = $(CC)
LINT = lint -c
RM = /bin/rm -f
ifeq ($(origin version), undefined)
version = 0.4
endif
#--------------------------------------------------------------------
LIBOBJS = libsock.o
TARGET = libmylibra.so \
test
#TARGET = test
#--------------------------------------------------------------------
all: $(TARGET)
#libmylibra.so: $(LIBOBJS)
# $(LINKER) $(SOFLAGS) $^ -o $@ -lc
libmylibra.so: $(LIBOBJS)
$(LINKER) $(SOFLAGS) -o $@ $^ -lc
#$(TARGET): $(LIBOBJS)
# $(LINKER) $(LDFLAGS) $(LIBOBJS) -o $(TARGET)
test: demo_use.o
$(LINKER) $(LDFLAGS) $^ -L. -lmylibra -o $@
clean:
@( $(RM) *.o vgcore.* core core.* $(TARGET) )
#--------------------------------------------------------------------
# make rule
%.o : %.cpp
$(CC) $(CFLAGS) -c $^ -o $@
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xenomai-help] shared library in xenomai ?
2009-05-05 5:45 luan dinh
@ 2009-05-05 5:54 ` Thomas Lockhart
0 siblings, 0 replies; 6+ messages in thread
From: Thomas Lockhart @ 2009-05-05 5:54 UTC (permalink / raw)
To: luan dinh; +Cc: xenomai
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> after that i write TEST program and use fuctions which my library
> support. i can build and run TEST program but some functions in my
> library doen't work ....
What does "doesn't work" mean? If the test program is willing to run
then it is finding all symbols in the library and (I think) the library
is finding all symbols it needs.
> how to build and use my shared library in xenomai?
Did you try running ldd on your built library to make sure that the
linking is finding all of the dependencies? Or please clarify what does
not seem to be working for you...
hth
- Tom
--
Thomas Lockhart
Supervisor, Distributed and Real-time Group
Instrument Software and Science Data Systems
Caltech/JPL
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Xenomai-help] shared library in xenomai ?
@ 2009-05-05 5:45 luan dinh
2009-05-05 5:54 ` Thomas Lockhart
0 siblings, 1 reply; 6+ messages in thread
From: luan dinh @ 2009-05-05 5:45 UTC (permalink / raw)
To: xenomai
[-- Attachment #1: Type: text/plain, Size: 666 bytes --]
Dear all.
i finished build a program and run it in xenomai. now i want to build it as shared library.
i use following commands to create library file (.so ) from object file (.o)
gcc -shared -Wl,-soname,libctest.so.1 -o libctest.so.1.0 *.o
mv libctest.so.1.0 /opt/lib
ln -sf /opt/lib/libctest.so.1.0 /opt/lib/libctest.so
ln -sf /opt/lib/libctest.so.1.0 /opt/lib/libctest.so.1
after that i write TEST program and use fuctions which my library
support. i can build and run TEST program but some functions in
my library doen't work ....
how to build and use my shared library in xenomai?
Thanks for any help.
Luan Dinh
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