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The `end' symbol doesn't match the end of the kernel image because it's

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relative to the start address (unless the start address is 0, which is
not the case).
This is currently not a problem because all powerpc architectures are
using loader(8) which passes metadata to the kernel including the
correct `endkernel' address.  If we don't use loader(8), register 4
and 5 will have the size of the kernel ELF file, not its end address.
We fix that simply by adding `kernel_text' to `end' to compute
`endkernel'.

Discussed with:	nathanw
This commit is contained in:
Rui Paulo 2012-06-29 01:55:20 +00:00
parent df7e35725b
commit 0381f4905f
2 changed files with 10 additions and 8 deletions
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9
sys/powerpc/aim/locore32.S
View File

@ -164,13 +164,14 @@ __start:
bl OF_initial_setup bl OF_initial_setup
lis 4,end@ha
addi 4,4,end@l
mr 5,4
lis 3,kernel_text@ha lis 3,kernel_text@ha
addi 3,3,kernel_text@l addi 3,3,kernel_text@l
lis 4,end@ha
addi 4,4,end@l
add 4,4,3
mr 5,4
/* Restore the argument pointer and length */ /* Restore the argument pointer and length */
mr 6,20 mr 6,20
mr 7,21 mr 7,21

9
sys/powerpc/aim/locore64.S
View File

@ -164,13 +164,14 @@ ASENTRY_NOPROF(__start)
bl OF_initial_setup bl OF_initial_setup
nop nop
lis 4,end@ha
addi 4,4,end@l
mr 5,4
lis 3,kernbase@ha lis 3,kernbase@ha
addi 3,3,kernbase@l addi 3,3,kernbase@l
lis 4,end@ha
addi 4,4,end@l
add 4,4,3
mr 5,4
/* Restore the argument pointer and length */ /* Restore the argument pointer and length */
mr 6,20 mr 6,20
mr 7,21 mr 7,21