[U-Boot] how compilor know where .text section starts from?
Hi, everybody: I am new to uboot and reading source code, I have a question: how does compilor know where .text section starts from? For example, I am using MPC8548CDS, document says .text section begins from 0xfff8000, but I haven't find this value in u-boot.lds? So it must be specified in some other place, right?
Dear hank.peng pengxihan@gmail.com,
repl: bad addresses: hank.peng pengxihan@gmail.com -- no at-sign after local-part (<)
Please fix the mail address you provide in your headers as return address. Either get rid of the dot, or add quotes.
In message 389deec70812022235v3f7ebedav57a62bcca04a19f0@mail.gmail.com you wrote:
I am new to uboot and reading source code, I have a question: how does compilor know where .text section starts from?
It doesn't. The compiler knows not much about the location of segments. That's a matter the linker deals with.
For example, I am using MPC8548CDS, document says .text section begins from 0xfff8000, but I haven't find this value in u-boot.lds? So it must be specified in some other place, right?
See board/<name>/config.mk
Best regards,
Wolfgang Denk
2008/12/3 Wolfgang Denk wd@denx.de:
Dear hank.peng pengxihan@gmail.com,
repl: bad addresses: hank.peng pengxihan@gmail.com -- no at-sign after local-part (<)
Please fix the mail address you provide in your headers as return address. Either get rid of the dot, or add quotes.
Fixed, :)
In message 389deec70812022235v3f7ebedav57a62bcca04a19f0@mail.gmail.com you wrote:
I am new to uboot and reading source code, I have a question: how does compilor know where .text section starts from?
It doesn't. The compiler knows not much about the location of segments. That's a matter the linker deals with.
For example, I am using MPC8548CDS, document says .text section begins from 0xfff8000, but I haven't find this value in u-boot.lds? So it must be specified in some other place, right?
See board/<name>/config.mk
I see that, so you mean linker will read TEXT_BASE from config.mk. Can I specify its value in u-boot.lds?
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de You can love it, change it, or leave it. There is NO other option. But do not complain - it is your own choice... -- wd
hank peng 写道:
2008/12/3 Wolfgang Denk wd@denx.de:
Dear hank.peng pengxihan@gmail.com,
repl: bad addresses: hank.peng pengxihan@gmail.com -- no at-sign after local-part (<)
Please fix the mail address you provide in your headers as return address. Either get rid of the dot, or add quotes.
Fixed, :)
In message 389deec70812022235v3f7ebedav57a62bcca04a19f0@mail.gmail.com you wrote:
I am new to uboot and reading source code, I have a question: how does compilor know where .text section starts from?
It doesn't. The compiler knows not much about the location of segments. That's a matter the linker deals with.
For example, I am using MPC8548CDS, document says .text section begins from 0xfff8000, but I haven't find this value in u-boot.lds? So it must be specified in some other place, right?
See board/<name>/config.mk
I see that, so you mean linker will read TEXT_BASE from config.mk. Can I specify its value in u-boot.lds?
Sure, of course you can. But you must ensure when CPU boots up, it can find the correct entrance.
participants (4)
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chen gong -
hank peng -
hank.peng
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Wolfgang Denk