diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2016-09-28 11:31:47 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-10-04 13:06:55 +1100 |
| commit | 573819e3433278cde17e7b93e101e59e96f19ccf (patch) | |
| tree | 475f117ca37f5045a820569c40a054cb9ad68b68 /arch/powerpc/kernel/head_64.S | |
| parent | be642c3457e75983be6f1f4bddcc77c9e2ed4650 (diff) | |
| download | linux-573819e3433278cde17e7b93e101e59e96f19ccf.tar.bz2 | |
powerpc/64: Change the way relocation copy is calculated
With a subsequent patch to put text into different sections,
(_end - _stext) can no longer be computed at link time to determine
the end of the copy. Instead, calculate it at runtime with
(copy_to_here - _stext) + (_end - copy_to_here).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index f765b0434731..6e21812ee672 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -628,11 +628,16 @@ __after_prom_start: bctr .balign 8 -p_end: .llong _end - _stext +p_end: .llong _end - copy_to_here -4: /* Now copy the rest of the kernel up to _end */ - addis r5,r26,(p_end - _stext)@ha - ld r5,(p_end - _stext)@l(r5) /* get _end */ +4: + /* + * Now copy the rest of the kernel up to _end, add + * _end - copy_to_here to the copy limit and run again. + */ + addis r8,r26,(p_end - _stext)@ha + ld r8,(p_end - _stext)@l(r8) + add r5,r5,r8 5: bl copy_and_flush /* copy the rest */ 9: b start_here_multiplatform |