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4 Commits

Author SHA1 Message Date
Sven Schnelle
7e923369b1 parisc: add spinlock to patch function 
If multiple CPUs are patching code we need the spinlock
to protect against parallel fixmap maps/unmap calls.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
 2019-06-08 12:56:26 +02:00
Sven Schnelle
4e87ace902 parisc: add support for patching multiple words 
add patch_text_multiple() which allows to patch multiple
text words in memory. This can be used to copy functions.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
 2019-06-08 12:56:25 +02:00
Sven Schnelle
ea5a8c620f parisc: remove unused flags parameter in __patch_text() 
It's not used by patch_map()/patch_unmap(), so lets remove
it.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
 2019-05-03 23:47:39 +02:00
Sven Schnelle
620a53d522 parisc: add parisc code patching 
Instead of re-mapping the whole kernel text with RWX rights
add a patch_text() which can be used to replace instructions
in the kernel .text section. Based on the ARM implementation.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
 2019-05-03 23:47:38 +02:00