embedded linux kernel make with compressed boot.pdf

8/17/2019 Embedded Linux Kernel make with compressed boot.pdf

1/12

Embedded Linux:Embedded Linux:

Kernel MakeKernel Make (compressed with boot)(compressed with boot)


2/12

http://network.hanbat.ac.kr Embedded Linux 2

kernelkernel

in $(!"#%)

& make

'' $(!"#%)

linux (

mlinux)

.

& ile linux

EL* +2'bit L,- executable danced %,0 Machines %M ersion 1staticall linked not stripped

kernel : *ile se3uence

head'arm., orhead'arm'dsc21., arch/armnommu/kernel

main.c init/

..

.

.


3/12


4/12

http://network.hanbat.ac.kr Embedded Linux =

Linux architecture'independent initiali>ationLinux architecture'independent initiali>ation

%eer http://www.linuxdoc.or9/?!@!/Linux'nit'?!@!'A.html

main.c/start8kernel()

setup8arch() setup8processor()

setup8architecture(machine8arch8tpe)

init8bootmem8node(B) ree8bootmem(B) pa9in98init(B)

trap8init() init8%7() /C initiali>e %7 handler C/ sched8init()

sotir38init()

time8init()D /C initiali>e timer C/

console8init()

init8modules() kmem8cache8init() mem8init()

mount initrd (mabe)

B

cpu8idle()D


5/12

http://network.hanbat.ac.kr Embedded Linux A

kernelkernel (not completed)(not completed)

*(.text.init)8stext 88init8be9in

*(.proc.info)

88proc8ino8be9in

*(.arch.info)88proc8ino8end 88arch8ino8be9in

*(.data.init)

*(.setup.init)

*(.initcall.init)

88arch8ino8end

88setup8start

88setup8end 88initcall8start

x1

x =4F.init

*(.text)8text

...

*(__ex_table)

88start888ex8table

*(__ksymtab)88stop888ex8table 88start888ksmtab

*(__kallsyms)88stop888ksmtab 88start888kallsms

*(.got)88stop888kallsms

8etext

.text


6/12

http://network.hanbat.ac.kr Embedded Linux

boot/compressed/mlinuxboot/compressed/mlinux boot/>ma9eboot/>ma9e

kernel

(pi99.o)

misc.o

head.o

o b Gcop 2

9 > ip. ld

,

in ...boot/compressed/

$(!"#%)/arch/armnommu/boot/compressed/mlinux

>ma9eo b Gcop

2

$(!"#%)/arch/armnommu/boot/>ma9e

head'arm., orhead'arm'dsc21.,

main.c

..

.


7/12http://network.hanbat.ac.kr Embedded Linux

$(!"#%)/arch/armnommu/boot/compressed/mlinux$(!"#%)/arch/armnommu/boot/compressed/mlinux

C(.start)C(.text)C(.ixup)

C(.9nu.warnin9)C(.rodata)

C(.rodata.C)C(.9lue8:)C(.9lue8:t)

L!#8##% 8load8addr

EH8,% 8text 8start

pi99.oinput8data

C(.data)input8data8end 8etext

text

data

C(.bss)8edata -,,8,% 88bss8start

bss

C(.stack)8end

stack

user8stack sp (initiall)


8/12http://network.hanbat.ac.kr Embedded Linux I

*lash ma9e*lash ma9e

>$ma9e l d kernel.o

initrd

l d

initrd.o

init.o lash kernel.o initrd.o%M kernel.oin .../boot/bootp/

...boot/bootp/bootp(*lash )


9/12http://network.hanbat.ac.kr Embedded Linux F

!erall *lash ma9e!erall *lash ma9e

kernel(pi99.o)

misc.o

head.o

,


init.olash kernel.o initrd.o%M

kernel.o

in .../boot/bootp/

initrd.o

kernel.ohead'arm., or

head'arm'dsc21.,

main.c

.

.

.


10/12http://network.hanbat.ac.kr Embedded Linux 14

-ootin9 ,cenario (1)-ootin9 ,cenario (1)

kernel(pi99.o)

misc.o

head.o

,


init.olash kernel.o initrd.o

%M kernel.oin .../boot/bootp/

initrd.o

kernel.o

bootblock

*lash %M

(1)

head'arm., or

head'arm'dsc21.,

main.c

.

.

.

(1) power'on boot block pc

lash init.o.

(pc r454 r15Juni3uearchitecture K MM6 o #'cacheo .

head'arm., .)



-ootin9 ,cenario (2)-ootin9 ,cenario (2)

kernel

(pi99.o)

misc.o

head.o

,


init.o

initrd.o

kernel.o

bootblock

*lash %M

kernel(pi99.o)

misc.o

head.o

initrd.o

(2 )

(2) *lash init.o kernel.o

initrd.o %M kernel.o

.

head'arm., or

head'arm'dsc21.,

main.c

.

.

.



-ootin9 ,cenario (+)-ootin9 ,cenario (+)

(+) head.o

.

kernel(pi99.o)

misc.o

head.o

,


init.o

initrd.o

kernel.o

bootblock

*lash %M

kernel

(pi99.o)

misc.o

head.o

initrd.o

kernel

(+)

head'arm., orhead'arm'dsc21.,

main.c

.

.

.

embedded linux kernel make with compressed boot.pdf

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