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Removed bogus padding that wasted 0x500 bytes.

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Improved code and comments.  Don't do anything except transfer control
in the head.o module.
This commit is contained in:
Bruce Evans 1995-11-18 05:25:24 +00:00
parent a87c854a14
commit 92b86cc420
2 changed files with 12 additions and 14 deletions
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16
sys/i386/boot/kzipboot/head.S
View File

@ -1,13 +1,11 @@
/* /*
* Leader for kernel * First module in a kzipped kernel.
* This needs to be at the beginning, so the start address is passed * This needs to be at the beginning so that the boot loader calls it.
* to the boot loader * It may be overwritten by uncompressing the kernel, so it transfers
* control to a higher address that won't be overwritten.
*
* Copyright (C) Serge Vakulenko * Copyright (C) Serge Vakulenko
*/ */
.text .text
.globl kzstart head:
kzstart: jmp tail
cli # disable interrupts
call start # unpack the kernel image
# never return here.
. = kzstart + 0x500 # skip warm boot stuff

10
sys/i386/boot/kzipboot/tail.S
View File

@ -3,10 +3,10 @@
* Copyright (C) Serge Vakulenko * Copyright (C) Serge Vakulenko
*/ */
.text .text
.globl start .globl tail
start: tail:
popl %eax # remove return addr cli # disable interrupts
pushl 4(%esp) # pass howto arg pushl 4(%esp) # pass howto arg
call _boot # unpack the kernel image call _boot # unpack the kernel image
popl %eax # discard howto arg popl %eax # discard howto arg
ljmp $CSEG, $KADDR # jump to unpacked kernel ljmp $CSEG, $KADDR # jump to unpacked kernel