[U-Boot-Users] how to modify my ld scripts

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[U-Boot-Users] U-Boot 0.4.0 on MBX...

Joe

27 Oct 2003 27 Oct '03

7:54 a.m.

Hi all: Whatever I modify my scripts ,The u-boot.bin is seemed no effect! So my ppcenv cant locate to a right room! Help please! joe

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Wolfgang Denk

27 Oct 27 Oct

8:57 a.m.

Dear Joe,

in message 20031027065406.94199.qmail@web41104.mail.yahoo.com you wrote:

...

Whatever I modify my scripts ,The u-boot.bin is
seemed no effect! So my ppcenv cant locate to a right room!

The location of the environment (in flash or in other type of memory, where in flash, etc.) is determined by the #defines in your board config file. Your u-boot.lds linker script must match this definition.

...

Help please!

How could we? You don't provide any information.

Wolfgang Denk

-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de You cannot propel yourself forward by patting yourself on the back.

Joe

11:14 a.m.

New subject: [U-Boot-Users] how to modify my ld scripts--the detail!

dear Wolf Denk: This is my scripts OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") OUTPUT_ARCH(arm) ENTRY(_start) SECTIONS { . = 0x00000000;

. = ALIGN(4); .text : { cpu/arm720t/start.o (.text) *(.text) }

. = ALIGN(4); .rodata : { *(.rodata) }

. = ALIGN(4); .data : { *(.data) }

. = ALIGN(4); .got : { *(.got) }

armboot_end_data = .;

. = ALIGN(4); .bss : { *(.bss) }

. = ALIGN(76 * 1024); .ppcenv : { common/environment.o (.ppcenv) }

armboot_end = .; }

and my board config files #define #define CFG_ENV_ADDR (PHYS_FLASH_1 + 0x13000)

Is it wrong? What i need to do?

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Wolfgang Denk

11:21 a.m.

New subject: [U-Boot-Users] how to modify my ld scripts--the detail!

Dear Joe,

in message 20031027101440.84892.qmail@web41110.mail.yahoo.com you wrote:

...

This is my scripts

...

    . = ALIGN(4);
    .bss : { *(.bss) }

     . = ALIGN(76 * 1024);

This _alignes_ on a 76 kB boundary (which makjes absolutely no sense to me), but it does not _place_ the segment at a certain address.

...

#define #define CFG_ENV_ADDR (PHYS_FLASH_1

0x13000)

Is it wrong? What i need to do?

Calculate result=PHYS_FLASH_1+0x13000 and use ". = result" in your linker script.

Best regards,

Wolfgang Denk

-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, I got those with the system, *for free*". - Linus Torvalds in 3itc77$9lj@ninurta.fer.uni-lj.si

Joe

11:54 a.m.

New subject: [U-Boot-Users] how to modify my ld scripts--3nd

Dear Wolfgang Denk: Thank you for your instance help! . = ALIGN(76 * 1024); you say: "Calculate result=PHYS_FLASH_1+0x13000 and use ". = result" in your linker script."

so The PHYS_FLASH_1 = 0; Can i modify my scripts as this? . = 0x13000; . = ALIGN(76 * 1024); .ppcenv : { common/environment.o (.ppcenv) } Thanks a lot! Joe

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Wolfgang Denk

12:36 p.m.

New subject: [U-Boot-Users] how to modify my ld scripts--3nd

In message 20031027105423.91301.qmail@web41110.mail.yahoo.com you wrote:

...

so The PHYS_FLASH_1 = 0; Can i modify my scripts as this? . = 0x13000; . = ALIGN(76 * 1024);

This makes no sense. Remove this align statement.

The rest is fine - assuming you really want to place your environment at an offset of 76 kB.

BTW - you can check the result of the linker run in the u-boot.map file.

Best regards,

Wolfgang Denk

-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de Quote from a recent meeting: "We are going to continue having these meetings everyday until I find out why no work is getting done."

Joe

12:16 p.m.

New subject: [U-Boot-Users] how to modify my ld scripts--the detail!

Dear Wolfgang Denk:

This is my scripts after modified!

OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") OUTPUT_ARCH(arm) ENTRY(_start) SECTIONS { . = 0x00000000; . = . + 0x10000; /*as a test,but it seem no efect to ppcboot.bin */ . = ALIGN(4); .text : { cpu/arm720t/start.o (.text) *(.text) }

. = ALIGN(4); .rodata : { *(.rodata) }

. = ALIGN(4); .data : { *(.data) } . = ALIGN(4); .got : { *(.got) }

armboot_end_data = .;

. = ALIGN(4); .bss : { *(.bss) }

. = 0x00014000; /* as you say*/

.ppcenv : { common/environment.o (.ppcenv) }

armboot_end = .; }

It do not work! I am crazy!

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Wolfgang Denk

12:40 p.m.

New subject: [U-Boot-Users] how to modify my ld scripts--the detail!

In message 20031027111633.64522.qmail@web41111.mail.yahoo.com you wrote:

...

    . = 0x00000000;
    . = . + 0x10000; /*as a test,but it seem no

efect to ppcboot.bin */

Except that it will probably break U-Boot.

...

    . = ALIGN(4);

Well, in both cases (with or without the "+ 0x10000") the alognment is already much more strict than a 4 byte boundary, so this ALIGN is not needed or even confusing.

...

It do not  work! I am crazy!

It probably does not work because of your modification above.

Also, I'd be very surprised if you managed to squeeze all of U-Boot code, data _and_ _bss_ to be smaller than 76 kB.

Hm, I'm afraid I cannot help you. "It do not work" is not exactly a precise problem description.

Best regards,

Wolfgang Denk

-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de Imagination is more important than knowledge. -- Albert Einstein

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