RE: [ECOS] hal tables in redboot...

[Mathieu Bertrand <Bertrand at tcl dot ite dot mee dot com>]

Hi Jonathan,

Thanks for your answer.
I'm not sure that my tables are really empty...
I've modified my redboot version in order to only manage the command table
in which I've inserted 4 elements with the 
RedBoot_cmd command. Here is the result of my redboot.list:
00040510 <__RedBoot_CMD_TAB_END__>:
   40510:	00017b00 	andeq	r7, r1, r0, lsl #22
   40514:	00017b08 	andeq	r7, r1, r8, lsl #22
   40518:	00017b28 	andeq	r7, r1, r8, lsr #22
   4051c:	00010dc0 	andeq	r0, r1, r0, asr #27

00040520 <_cmd_tab_do_exec>:
   40520:	00016fa0 	andeq	r6, r1, r0, lsr #31
   40524:	00016fa8 	andeq	r6, r1, r8, lsr #31
   40528:	00016fc8 	andeq	r6, r1, r8, asr #31
   4052c:	0000a000 	andeq	sl, r0, r0

00040530 <_cmd_tab_do_load>:
   40530:	00017158 	andeq	r7, r1, r8, asr r1
   40534:	00017160 	andeq	r7, r1, r0, ror #2
   40538:	000403b0 	streqh	r0, [r4], -r0
   4053c:	0000aae0 	andeq	sl, r0, r0, ror #21

00040540 <_cmd_tab_do_ping>:
   40540:	000174c0 	andeq	r7, r1, r0, asr #9
   40544:	000174c8 	andeq	r7, r1, r8, asr #9
   40548:	000174e8 	andeq	r7, r1, r8, ror #9
   4054c:	0000b040 	andeq	fp, r0, r0, asr #32

Under the redboot prompt, I can print the following addresses:
__RedBoot_CMD_TAB__: 00040510
__RedBoot_CMD_TAB_END__: 00040510

Since my command is parsed from __RedBoot_CMD_TAB__ to
__RedBoot_CMD_TAB_END__, I can't find any matching command.
There is something I can't understand, it seems to be empty but commands are
however here.
What am I missing ?

Thanks for your help.

Mathieu



Mathieu Bertrand wrote:
> Hi to all,
> 
> I'm currently designing a redboot version in RAM for testing purpose on an
> ixp2400 hardware.
> I've encountered troubles with the use of hal tables defined in main.c as
> follows:
> CYG_HAL_TABLE_BEGIN( __RedBoot_INIT_TAB__, RedBoot_inits );
> CYG_HAL_TABLE_END( __RedBoot_INIT_TAB_END__, RedBoot_inits );
> 
> CYG_HAL_TABLE_BEGIN( __RedBoot_CMD_TAB__, RedBoot_commands );
> CYG_HAL_TABLE_END( __RedBoot_CMD_TAB_END__, RedBoot_commands );
> 
> not to mention the netdev tables defined in net_io.c.
> CYG_HAL_TABLE_BEGIN( __NETDEVTAB__, netdev );
> CYG_HAL_TABLE_END( __NETDEVTAB_END__, netdev );
> 
> My questions are the following:
> 1. How does it work and how do the RedBoot_cmd and RedBoot_init commands
add
> entries in __RedBoot_CMD_TAB__ and __RedBoot_INIT_TAB__ tables
respectively
> ?

Using properties of ELF. See hal/common/current/include/hal_tables.h for 
the generated asm directives.

> 2. In my customized version, all these tables seem to be mapped at the
same
> address.

That implies they're empty.

Jifl
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