hi: I use function ret = msgget(KEY_MQ_CORE, IPC_CREAT|0660); make successed. After exec, but the return value is -1 I want to use cmd "IPCS" to check the ipc ID. but shell return: not found. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif How can I do? The same function "msgget" used in other uClinx os is OK. Why failed in nios2 uClinux? Why the cmd "IPCS" not support nios2 linux? Thanks a lot.

Today I write a test.c for test ipc/msg. frist I make it use GCC, it work fine in FC4. Then I make it use nios2-linux-uclibc-gcc, and exec it. But msgQ not inplemented following is the return information in shell. # msgsend msgget: Calling msgget(0x4d2,01666) msgget: Function not implemented# So I check the nios2 kernel configure, I slect "general-->POSIX Message Queues" setting and rebuild the kernel. follow is rebuilding kernel information: [Alex@localhost linux-2.6.x]$ make ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc- zImage no emulation specific options. CHK include/linux/version.h SPLIT include/linux/autoconf.h -> include/config/* CHK include/nios2_system.h perl -I/home/Alex/linux-2.6.x/arch/nios2nommu/scripts /home/Alex/linux-2.6.x/arch/nios2nommu/scripts/gen_nios2_system.h.pl cpu sdram ext_flash < ../nios2_ptf/CRM3500N_cpu_v2.ptf > include/nios2_system.h.tmp; if [ -r include/nios2_system.h ] && cmp -s include/nios2_system.h include/nios2_system.h.tmp; then rm -f include/nios2_system.h.tmp; else echo &#39; UPD include/nios2_system.h&#39;; mv -f include/nios2_system.h.tmp include/nios2_system.h; fi make[1]: “arch/nios2nommu/kernel/asm-offsets.s”&#26159;&#26368;&#26032;&#30340;&#12290; CHK include/asm-nios2nommu/asm-offsets.h CHK include/linux/compile.h CHK usr/initramfs_list CC ipc/mqueue.o CC ipc/msgutil.o LD ipc/built-in.o GEN .version CHK include/linux/compile.h UPD include/linux/compile.h CC init/version.o LD init/built-in.o LD vmlinux SYSMAP System.map OBJCOPY arch/nios2nommu/boot/compressed/vmlinux.bin GZIP arch/nios2nommu/boot/compressed/vmlinux.bin.gz LD arch/nios2nommu/boot/compressed/piggy.o LD arch/nios2nommu/boot/compressed/vmlinux OBJCOPY arch/nios2nommu/boot/zImage Kernel: arch/nios2nommu/boot/zImage is ready [Alex@localhost linux-2.6.x]$ I find CC ipc/mqueue.o , so I think maybe ipcs will suppourt. CC ipc/msgutil.o LD ipc/built-in.o http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif I exec the zImage, but ipcs cmd still lost. And exec the test bin still failed. The following is the test.c for test ipc/mqueue # include <sys/types.h># include <sys/ipc.h># include <sys/msg.h># include <stdio.h># include <string.h># define MSGSZ 128 /* * Declare the message structure. */ typedef struct { long mtype; char mtext[MSGSZ]; } message_buf; main(){ int msqid; int msgflg = IPC_CREAT | 0666; key_t key; message_buf sbuf; size_t buf_length; /* * Get the message queue id for the * "name" 1234, which was created by * the server. */ key = 1234; (void) fprintf(stderr, "\nmsgget: Calling msgget(%#lx,\%#o)\n", key, msgflg); if ((msqid = msgget(key, msgflg )) < 0) { perror("msgget"); exit(1); } else (void) fprintf(stderr, "msgget: msgget succeeded: msqid = %d\n", msqid); /* * We&#39;ll send message type 1 */ sbuf.mtype = 1; (void) fprintf(stderr, "msgget: msgget succeeded: msqid = %d\n", msqid); (void) strcpy(sbuf.mtext, "Did you get this?"); (void) fprintf(stderr, "msgget: msgget succeeded: msqid = %d\n", msqid); buf_length = strlen(sbuf.mtext) ; /* * Send a message. */ if (msgsnd(msqid, &sbuf, buf_length, IPC_NOWAIT) < 0) { printf ("%d, %d, %s, %d\n", msqid, sbuf.mtype, sbuf.mtext, buf_length); perror("msgsnd"); exit(1); } else printf("Message: \"%s\" Sent\n", sbuf.mtext); exit(0); } Pleaes let us solver the question togeter. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

for ipcs you can enable it in busybox under buildroot. But I don&#39;t know if nios2 kernel support it correctly.

--- Quote Start --- originally posted by hippo@May 11 2006, 02:10 PM for ipcs you can enable it in busybox under buildroot. but i don&#39;t know if nios2 kernel support it correctly. <div align='right'><{post_snapback}> (index.php?act=findpost&pid=15279) --- quote end --- --- Quote End --- I enabled msg queue in kernel, run ipcs, # ipcs kernel not configured for shared memory kernel not configured for semaphores kernel not configured for message queues#

Thank you hippo. I use make menuconfig and make in ~/buildroot/build_nios2/busybox dir. frist I enable " ipcs" second "make" but how can I update roofs? I use"make" in `/buildroot dir,but the busybox exec file is not the nios2 exec file

--- Quote Start --- originally posted by hippo+may 11 2006, 01:47 am--><div class='quotetop'>quote (hippo @ may 11 2006, 01:47 am)</div> --- quote start --- <!--quotebegin-hippo@May 11 2006, 02:10 PM for ipcs you can enable it in busybox under buildroot. but i don&#39;t know if nios2 kernel support it correctly. <div align='right'><{post_snapback}> (index.php?act=findpost&pid=15279) --- quote end --- --- Quote End --- I enabled msg queue in kernel, run ipcs, # ipcs kernel not configured for shared memory kernel not configured for semaphores kernel not configured for message queues# <div align='right'><{post_snapback}> (index.php?act=findpost&pid=15281)</div> [/b] --- Quote End --- HI hippo: What meanings the "kernel not configured for message queues"? Is it meaning the nios2 uclinux kernel not support message queues?or I lost some setting in kernel configur?

how to use "msgget" in nios2 uclinx? | Altera Community

13 Replies

Altera_Forum
Honored Contributor
20 years ago
--- Quote Start ---
originally posted by hippo@May 11 2006, 09:11 PM
please check ~/apps/mqueue .
<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15310)
--- quote end ---

--- Quote End ---

I make ~/apps/mqueue but failed. So I rework the Makefile of mqueue .

But I meet a question. If I want to use mqueue ,frist I must make ~/apps/mqueue/src to make libmqueue.a

So I added "ar = nios2-linux-uclibc-ar' id makefile.

but in make process, the cc use gcc not nios2-linux-uclibc-gcc,so the libmqueue.a
is wrong.
Altera_Forum
Honored Contributor
20 years ago
--- Quote Start ---
originally posted by alex824+may 12 2006, 02:51 pm--><div class='quotetop'>quote (alex824 @ may 12 2006, 02:51 pm)</div>
--- quote start ---
<!--quotebegin-hippo@May 11 2006, 09:11 PM
please check ~/apps/mqueue .
<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15310)
--- quote end ---

--- Quote End ---

I make ~/apps/mqueue but failed. So I rework the Makefile of mqueue .

But I meet a question. If I want to use mqueue ,frist I must make ~/apps/mqueue/src to make libmqueue.a

So I added "ar = nios2-linux-uclibc-ar' id makefile.

but in make process, the cc use gcc not nios2-linux-uclibc-gcc,so the libmqueue.a
is wrong.
<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15316)</div>
[/b]
--- Quote End ---

Please look at download/mx140apps.diff, and modify the Makefile.
Altera_Forum
Honored Contributor
20 years ago
[
--- Quote End ---

Please look at download/mx140apps.diff, and modify the Makefile.
<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15319)</div>

--- Quote End ---

Thanks hippo.
I have already rework ~/app/mqueue fo following mx140apps.diff.

But the mx140apps.diff not dabble at the link *.A .

Can you give us a template?

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how to use "msgget" in nios2 uclinx?

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