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author | Arvind Sankar <nivedita@alum.mit.edu> | 2020-01-07 22:44:34 +0300 |
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committer | Borislav Petkov <bp@suse.de> | 2020-01-23 13:58:43 +0300 |
commit | 183ef7adf4ed638ac0fb0c3c9a71fc00e8512b61 (patch) | |
tree | 2d58db55eedf738b53bfefafa5bfd64757c41ae8 /arch/x86/entry | |
parent | b2b1d94cdfd4e906d3936dab2850096a4a0c2017 (diff) | |
download | linux-183ef7adf4ed638ac0fb0c3c9a71fc00e8512b61.tar.xz |
x86/boot: Simplify calculation of output address
Condense the calculation of decompressed kernel start a little.
Committer notes:
before:
ebp = ebx - (init_size - _end)
after:
eax = (ebx + _end) - init_size
where in both ebx contains the temporary address the kernel is moved to
for in-place decompression.
The before and after difference in register state is %eax and %ebp
but that is immaterial because the compressed image is not built with
-mregparm, i.e., all arguments of the following extract_kernel() call
are passed on the stack.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200107194436.2166846-1-nivedita@alum.mit.edu
Diffstat (limited to 'arch/x86/entry')
0 files changed, 0 insertions, 0 deletions