I have added the line:
extern int      shm_nused;
I will let you know the result

Jose Luis Rodriguez Garcia wrote:

> It fails with:
>
> cc -ffreestanding -march=pentium3 -O2 -Werror -Wall -Wno-main 
> -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes 
> -Wstrict-prototypes -Wno-sign-compare -fno-zero-initialized-in-bss 
> -Di386 -I. -I../../../../arch -I../../../.. -nostdinc -DSEM_DEBUG 
> -DSHMDEBUG -DLKM -DMAXUSERS=32 -D_KERNEL -D_KERNEL_OPT 
> -I../../../../dist/ipf -c ../../../../compat/linux/common/linux_ipc.c
> ../../../../compat/linux/common/linux_ipc.c: In function 
> `linux_sys_shmctl':
> ../../../../compat/linux/common/linux_ipc.c:534: error: `shm_nused' 
> undeclared (first use in this function)
> ../../../../compat/linux/common/linux_ipc.c:534: error: (Each 
> undeclared identifier is reported only once
> ../../../../compat/linux/common/linux_ipc.c:534: error: for each 
> function it appears in.)
>
>
> Chuck Silvers wrote:
>
>> On Wed, Nov 02, 2005 at 07:14:09PM +0100, Jose Luis Rodriguez Garcia 
>> wrote:
>>  
>>
>>> It didn't work.
>>> It appears that it calls linux_sys_shmctl
>>> I have added the next line at the end of this funcition:
>>>
>>> printf("sys_shmctl: %d\n",SCARG(uap, cmd));
>>>
>>> It prints the next output:
>>> sys_shmctl: 258
>>>
>>> Can it be: 258=256 +2, and LINUX_IPC_STAT=2?
>>>   
>>
>>
>> yup, 0x100 is IPC_64, which is for running 32-bit binaries on 64-bit 
>> kernels.
>> here's yet another patch (which doesn't so the 32-on-64 thing, but 
>> should
>> work for 32-on-32).
>>
>> -Chuck
>>  
>>
>> ------------------------------------------------------------------------
>>
>> Index: src/sys/compat/linux/common/linux_ipc.c
>> ===================================================================
>> RCS file: /cvsroot/src/sys/compat/linux/common/linux_ipc.c,v
>> retrieving revision 1.31
>> diff -u -p -r1.31 linux_ipc.c
>> --- src/sys/compat/linux/common/linux_ipc.c    26 Feb 2005 23:10:19 
>> -0000    1.31
>> +++ src/sys/compat/linux/common/linux_ipc.c    2 Nov 2005 16:32:39 -0000
>> @@ -469,11 +469,15 @@ linux_sys_shmctl(l, v, retval)
>>     struct sys___shmctl13_args nua;
>>     struct shmid_ds *bsp, bs;
>>     struct linux_shmid_ds ls;
>> -    int error;
>> +    struct linux_shminfo64 lsi64;
>> +    struct linux_shm_info lsi;
>> +    int error, i, cmd;
>>
>>     SCARG(&nua, shmid) = SCARG(uap, shmid);
>> -    switch (SCARG(uap, cmd)) {
>> +    cmd = SCARG(uap, cmd) & ~LINUX_IPC_64;
>> +    switch (cmd) {
>>     case LINUX_IPC_STAT:
>> +    case LINUX_SHM_STAT:
>>         sg = stackgap_init(p, 0);
>>         bsp = stackgap_alloc(p, &sg, sizeof(struct shmid_ds));
>>         SCARG(&nua, cmd) = IPC_STAT;
>> @@ -483,7 +487,12 @@ linux_sys_shmctl(l, v, retval)
>>         if ((error = copyin(SCARG(&nua, buf), &bs, sizeof bs)))
>>             return error;
>>         bsd_to_linux_shmid_ds(&bs, &ls);
>> +        if (cmd == LINUX_SHM_STAT) {
>> +            retval[0] = IXSEQ_TO_IPCID(bs.shm_perm._key,
>> +                           bs.shm_perm);
>> +        }
>>         return copyout(&ls, SCARG(uap, buf), sizeof ls);
>> +
>>     case LINUX_IPC_SET:
>>         if ((error = copyin(SCARG(uap, buf), &ls, sizeof ls)))
>>             return error;
>> @@ -495,22 +504,47 @@ linux_sys_shmctl(l, v, retval)
>>         SCARG(&nua, cmd) = IPC_SET;
>>         SCARG(&nua, buf) = bsp;
>>         break;
>> +
>>     case LINUX_IPC_RMID:
>>         SCARG(&nua, cmd) = IPC_RMID;
>>         SCARG(&nua, buf) = NULL;
>>         break;
>> +
>>     case LINUX_SHM_LOCK:
>>         SCARG(&nua, cmd) = SHM_LOCK;
>>         SCARG(&nua, buf) = NULL;
>>         break;
>> +
>>     case LINUX_SHM_UNLOCK:
>>         SCARG(&nua, cmd) = SHM_UNLOCK;
>>         SCARG(&nua, buf) = NULL;
>>         break;
>> +
>>     case LINUX_IPC_INFO:
>> -    case LINUX_SHM_STAT:
>> +        memset(&lsi64, 0, sizeof lsi64);
>> +        lsi64.l_shmmax = shminfo.shmmax;
>> +        lsi64.l_shmmin = shminfo.shmmin;
>> +        lsi64.l_shmmni = shminfo.shmmni;
>> +        lsi64.l_shmseg = shminfo.shmseg;
>> +        lsi64.l_shmall = shminfo.shmall;
>> +        return copyout(&lsi64, SCARG(uap, buf), sizeof lsi64);
>> +
>>     case LINUX_SHM_INFO:
>> +        memset(&lsi, 0, sizeof lsi);
>> +        lsi.l_used_ids = shm_nused;
>> +        for (i = 0; i < shminfo.shmmni; i++) {
>> +            if (shmsegs[i].shm_perm.mode & 0x800) {
>> +                lsi.l_shm_tot += shmsegs[i].shm_segsz;
>> +            }
>> +        }
>> +        lsi.l_shm_rss = 0;
>> +        lsi.l_shm_swp = 0;
>> +        lsi.l_swap_attempts = 0;
>> +        lsi.l_swap_successes = 0;
>> +        return copyout(&lsi, SCARG(uap, buf), sizeof lsi);
>> +
>>     default:
>> +        printf("linux_sys_shmctl cmd %d\n", SCARG(uap, cmd));
>>         return EINVAL;
>>     }
>>     return sys___shmctl13(l, &nua, retval);
>> Index: src/sys/compat/linux/common/linux_ipc.h
>> ===================================================================
>> RCS file: /cvsroot/src/sys/compat/linux/common/linux_ipc.h,v
>> retrieving revision 1.6
>> diff -u -p -r1.6 linux_ipc.h
>> --- src/sys/compat/linux/common/linux_ipc.h    30 May 2001 11:37:27 
>> -0000    1.6
>> +++ src/sys/compat/linux/common/linux_ipc.h    2 Nov 2005 16:32:39 -0000
>> @@ -72,6 +72,8 @@ struct linux_ipc_perm {
>> #define LINUX_IPC_STAT    2
>> #define LINUX_IPC_INFO    3
>>
>> +#define LINUX_IPC_64    0x100
>> +
>> #if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG)
>> #ifdef _KERNEL
>> __BEGIN_DECLS
>> Index: src/sys/compat/linux/common/linux_shm.h
>> ===================================================================
>> RCS file: /cvsroot/src/sys/compat/linux/common/linux_shm.h,v
>> retrieving revision 1.6
>> diff -u -p -r1.6 linux_shm.h
>> --- src/sys/compat/linux/common/linux_shm.h    28 Sep 2004 19:05:19 
>> -0000    1.6
>> +++ src/sys/compat/linux/common/linux_shm.h    2 Nov 2005 16:32:39 -0000
>> @@ -58,6 +58,27 @@ struct linux_shmid_ds {
>>     void            *l_private3;
>> };
>>
>> +struct linux_shminfo64 {
>> +    u_long            l_shmmax;
>> +    u_long            l_shmmin;
>> +    u_long            l_shmmni;
>> +    u_long            l_shmseg;
>> +    u_long            l_shmall;
>> +    u_long            l___unused1;
>> +    u_long            l___unused2;
>> +    u_long            l___unused3;
>> +    u_long            l___unused4;
>> +};
>> +
>> +struct linux_shm_info {
>> +    int            l_used_ids;
>> +    u_long            l_shm_tot;
>> +    u_long            l_shm_rss;
>> +    u_long            l_shm_swp;
>> +    u_long            l_swap_attempts;
>> +    u_long            l_swap_successes;
>> +};
>> +
>> #define LINUX_SHM_RDONLY    0x1000
>> #define LINUX_SHM_RND        0x2000
>> #define LINUX_SHM_REMAP        0x4000
>>  
>>
>