About .u_boot_cmd section, you can see the u-boot.lds for each
processor core directory(arch/...).
This section collects all cmd_tbl_t structures into this section.
So each uboot command line command should use macro U_BOOT_CMD to
allocate the structure.
After compilation you can see how linker arrange the cmd_tbl_t
structures into .u_boot_cmd section.
EX.
...............
.u_boot_cmd 0x33f97fe4 0x468
*(.u_boot_cmd)
.u_boot_cmd 0x33f97fe4 0x18 common/libcommon.a(cmd_bdinfo.o)
0x33f97fe4 __u_boot_cmd_bdinfo
.u_boot_cmd 0x33f97ffc 0x30 common/libcommon.a(cmd_boot.o)
0x33f97ffc __u_boot_cmd_go
0x33f98014 __u_boot_cmd_reset
.u_boot_cmd 0x33f9802c 0x78 common/libcommon.a(cmd_bootm.o)
0x33f9802c __u_boot_cmd_bootm
0x33f98044 __u_boot_cmd_boot
0x33f9805c __u_boot_cmd_bootd
0x33f98074 __u_boot_cmd_iminfo
0x33f9808c __u_boot_cmd_imls
.u_boot_cmd 0x33f980a4 0x30 common/libcommon.a(cmd_cache.o)
0x33f980a4 __u_boot_cmd_icache
0x33f980bc __u_boot_cmd_dcache
.u_boot_cmd 0x33f980d4 0x18 common/libcommon.a(cmd_console.o)
0x33f980d4 __u_boot_cmd_coninfo
.u_boot_cmd 0x33f980ec 0x18 common/libcommon.a(cmd_date.o)
0x33f980ec __u_boot_cmd_date
.............
See, just like a table in memory.
So you can use a for-loop to traverse the table and print each
command's description jusk like the _do_help()(in common/command.c)
do.
Paul
Wed, Aug 11, 2010 at 2:05 PM, <prashantpurohit...@gmail.com> wrote:
> Hi all,
>
> I need to know how the command line interface has been developed in U-boot?
>
> I could understand few things about command line interface from command.h
> and command.c file.
>
> I am unable to get how from command line the U_BOOT_CMD macro has been
> called?
>
> Also, what is the need of the special section for U-boot i.e ".u_boot_cmd"?
>
> If any one has more info about it, please let me know as I am developing a
> similar command line interface for my application.
>
> Thanks in advance.
>
> Cheers,
> Prashant
>
> _______________________________________________
> U-Boot mailing list
> U-Boot@lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
>
>
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