About the initialization of 'struct linux_record_tdep'

About the initialization of 'struct linux_record_tdep'

[xingxing pan]

Hi. I'm just porting the process record function to an ARM similar arch.
To initialize the struct linux_record_tdep, one has to collect the
size of various types.
Is there some way to do this beside diving into the kernel source or
system including files?
Why not finish the collecting during the configure stage?

Thank you.

Re: About the initialization of 'struct linux_record_tdep'

[Hui Zhu]

Why not?
Maybe you can work on it first.  :)

Hui

On Thu, Oct 14, 2010 at 09:46, xingxing pan <forandom@gmail.com> wrote:
> Hi. I'm just porting the process record function to an ARM similar arch.
> To initialize the struct linux_record_tdep, one has to collect the
> size of various types.
> Is there some way to do this beside diving into the kernel source or
> system including files?
> Why not finish the collecting during the configure stage?
>
> Thank you.
>

Re: About the initialization of 'struct linux_record_tdep'

[Joseph S. Myers]

On Thu, 14 Oct 2010, xingxing pan wrote:

> Hi. I'm just porting the process record function to an ARM similar arch.
> To initialize the struct linux_record_tdep, one has to collect the
> size of various types.
> Is there some way to do this beside diving into the kernel source or
> system including files?
> Why not finish the collecting during the configure stage?

You don't generally have target headers available when configuring GDB, 
only those for the host system, and it is also possible that a single GDB 
configuration supports multiple target ABIs (32-bit and 64-bit say).

-- 
Joseph S. Myers
joseph@codesourcery.com

Re: About the initialization of 'struct linux_record_tdep'

[Hui Zhu]

On Fri, Oct 15, 2010 at 00:40, Joseph S. Myers <joseph@codesourcery.com> wrote:
> On Thu, 14 Oct 2010, xingxing pan wrote:
>
>> Hi. I'm just porting the process record function to an ARM similar arch.
>> To initialize the struct linux_record_tdep, one has to collect the
>> size of various types.
>> Is there some way to do this beside diving into the kernel source or
>> system including files?
>> Why not finish the collecting during the configure stage?
>
> You don't generally have target headers available when configuring GDB,
> only those for the host system, and it is also possible that a single GDB
> configuration supports multiple target ABIs (32-bit and 64-bit say).
>
> --
> Joseph S. Myers
> joseph@codesourcery.com
>

I agree with that, for current status, this config didn't need
anything of target linux kernel.

Following part is a file that get the size of some kernel struct, you
can use it to get this size.

Thanks,
Hui

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdint.h>
#include <sys/times.h>
#include <linux/utsname.h>
#include <ustat.h>
#include <signal.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/sysinfo.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/shm.h>
#include <sys/timex.h>
#include <sys/quota.h>
#include <linux/dqblk_v1.h>
#include <linux/dqblk_v2.h>
#include <linux/dqblk_xfs.h>
#include <time.h>
#include <poll.h>
#include <linux/nfsd/nfsfh.h>
#include <sys/capability.h>
#include <asm/ldt.h>
#include <linux/aio_abi.h>
#include <sys/epoll.h>
#include <mqueue.h>
//#include <termios.h>
#include <asm/termios.h>
//#include <asm/termbits.h>
#include <linux/serial.h>
#include <linux/hayesesp.h>
#define __USE_LARGEFILE64
#include <dirent.h>
#include <sys/vfs.h>
#include <sys/stat.h>
#include <fcntl.h>



struct a__old_kernel_stat {
        unsigned short st_dev;
        unsigned short st_ino;
        unsigned short st_mode;
        unsigned short st_nlink;
        unsigned short st_uid;
        unsigned short st_gid;
        unsigned short st_rdev;
        unsigned int  st_size;
        unsigned int  a;
        unsigned int  b;
        unsigned int  c;
};

int
main(int argc,char *argv[],char *envp[])
{
        printf ("%d\n", sizeof (char *));
        printf ("%d\n", sizeof (struct a__old_kernel_stat));
        printf ("%d\n", sizeof (struct tms));
        printf ("%d\n", sizeof (loff_t));
        printf ("%d\n", sizeof (struct flock));
        printf ("%d\n", sizeof (struct oldold_utsname));
        printf ("%d\n", sizeof (struct ustat));
        printf ("%d\n", sizeof (struct sigaction));
        printf ("%d\n", sizeof (sigset_t));
        printf ("%d\n", sizeof (struct rlimit));
        printf ("%d\n", sizeof (struct rusage));
        printf ("%d\n", sizeof (struct timeval));
        printf ("%d\n", sizeof (struct timezone));
        printf ("%d\n", sizeof (unsigned short));
        printf ("%d\n", sizeof (fd_set));
        printf ("%d\n", sizeof (struct dirent));
        printf ("%d\n", sizeof (struct dirent64));
        printf ("%d\n", sizeof (struct statfs));
        printf ("%d\n", sizeof (struct statfs64));
        printf ("%d\n", sizeof (struct sockaddr));
        printf ("%d\n", sizeof (int));
        printf ("%d\n", sizeof (long));
        printf ("%d\n", sizeof (unsigned long));
        printf ("%d\n", sizeof (struct msghdr));
        printf ("%d\n", sizeof (struct itimerval));
        printf ("%d\n", sizeof (struct stat));
        printf ("%d\n", sizeof (struct old_utsname));
        printf ("%d\n", sizeof (struct sysinfo));
        printf ("%d\n", sizeof (struct msqid_ds));
        printf ("%d\n", sizeof (struct shmid_ds));
        printf ("%d\n", sizeof (struct new_utsname));
        printf ("%d\n", sizeof (struct timex));
        printf ("%d\n", sizeof (struct dqinfo));
        printf ("%d\n", sizeof (struct dqblk));
        printf ("%d\n", sizeof (struct fs_quota_stat));
        printf ("%d\n", sizeof (struct timespec));
        printf ("%d\n", sizeof (struct pollfd));
        printf ("%d\n", sizeof (struct knfsd_fh));
        printf ("%d\n", sizeof (struct sigaction));
        printf ("%d\n", sizeof (sigset_t));
        printf ("%d\n", sizeof (siginfo_t));
        printf ("%d\n", sizeof (cap_user_data_t));
        printf ("%d\n", sizeof (stack_t));
        printf ("%d\n", sizeof (off_t));
        printf ("%d\n", sizeof (struct stat64));
        printf ("%d\n", sizeof (gid_t));
        printf ("%d\n", sizeof (uid_t));
        //printf ("%d\n", sizeof (struct flock64));
        printf ("%d\n", sizeof (struct user_desc));
        printf ("%d\n", sizeof (struct io_event));
        printf ("%d\n", sizeof (struct iocb));
        printf ("%d\n", sizeof (struct epoll_event));
        printf ("%d\n", sizeof (struct itimerspec));
        printf ("%d\n", sizeof (struct mq_attr));
        printf ("%d\n", sizeof (struct siginfo));
        //printf ("%d\n", sizeof (struct termios));
        //printf ("%d\n", sizeof (struct termios2));
        printf ("%d\n", sizeof (pid_t));
        //printf ("%d\n", sizeof (struct winsize));
        printf ("%d\n", sizeof (struct serial_struct));
        printf ("%d\n", sizeof (struct serial_icounter_struct));
        printf ("%d\n", sizeof (struct hayes_esp_config));
        printf ("%d\n", sizeof (size_t));
        printf ("%d\n", sizeof (struct iovec));
        printf ("%x\n", _IOR('T',0x2A, struct termios2));
        printf ("%x\n", _IOW('T',0x2B, struct termios2));
        printf ("%x\n", _IOR('T',0x2C, struct termios2));
        printf ("%x\n", _IOR('T',0x2D, struct termios2));
        printf ("%x\n", _IOR('T',0x30, unsigned int));
        printf ("%x\n", _IOW('T',0x31, int));

        return (0);
}