mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.2 KiB
51 lines
1.2 KiB
/* |
|
* M7patch.S: Patch generic routines with M7 variant. |
|
* |
|
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
|
*/ |
|
|
|
#include <linux/linkage.h> |
|
|
|
#define BRANCH_ALWAYS 0x10680000 |
|
#define NOP 0x01000000 |
|
#define NG_DO_PATCH(OLD, NEW) \ |
|
sethi %hi(NEW), %g1; \ |
|
or %g1, %lo(NEW), %g1; \ |
|
sethi %hi(OLD), %g2; \ |
|
or %g2, %lo(OLD), %g2; \ |
|
sub %g1, %g2, %g1; \ |
|
sethi %hi(BRANCH_ALWAYS), %g3; \ |
|
sll %g1, 11, %g1; \ |
|
srl %g1, 11 + 2, %g1; \ |
|
or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
|
or %g3, %g1, %g3; \ |
|
stw %g3, [%g2]; \ |
|
sethi %hi(NOP), %g3; \ |
|
or %g3, %lo(NOP), %g3; \ |
|
stw %g3, [%g2 + 0x4]; \ |
|
flush %g2; |
|
|
|
ENTRY(m7_patch_copyops) |
|
NG_DO_PATCH(memcpy, M7memcpy) |
|
NG_DO_PATCH(raw_copy_from_user, M7copy_from_user) |
|
NG_DO_PATCH(raw_copy_to_user, M7copy_to_user) |
|
retl |
|
nop |
|
ENDPROC(m7_patch_copyops) |
|
|
|
ENTRY(m7_patch_bzero) |
|
NG_DO_PATCH(memset, M7memset) |
|
NG_DO_PATCH(__bzero, M7bzero) |
|
NG_DO_PATCH(__clear_user, NGclear_user) |
|
NG_DO_PATCH(tsb_init, NGtsb_init) |
|
retl |
|
nop |
|
ENDPROC(m7_patch_bzero) |
|
|
|
ENTRY(m7_patch_pageops) |
|
NG_DO_PATCH(copy_user_page, NG4copy_user_page) |
|
NG_DO_PATCH(_clear_page, M7clear_page) |
|
NG_DO_PATCH(clear_user_page, M7clear_user_page) |
|
retl |
|
nop |
|
ENDPROC(m7_patch_pageops)
|
|
|