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authorSam Ravnborg <sam@ravnborg.org>2012-05-11 11:35:11 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-11 19:27:50 -0700
commit054768a132c5c78d1aebf8be1b2927814c670845 (patch)
tree3f71c113e523b0817d46f5e66b0c9608fdaae201 /arch/sparc/kernel
parent28de2f7339c5d5d972165a1fdc8510dcd8d3fead (diff)
downloadlinux-054768a132c5c78d1aebf8be1b2927814c670845.tar.gz
sparc32: drop sun4c window overflow stack checking routine
Also drop run-time patching for srmmu Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r--arch/sparc/kernel/wof.S72
1 files changed, 2 insertions, 70 deletions
diff --git a/arch/sparc/kernel/wof.S b/arch/sparc/kernel/wof.S
index 3bbcd8dc9ab..4c2de3cf309 100644
--- a/arch/sparc/kernel/wof.S
+++ b/arch/sparc/kernel/wof.S
@@ -163,9 +163,8 @@ spwin_fromuser:
* the label 'spwin_user_stack_is_bolixed' which will take
* care of things at that point.
*/
- .globl spwin_mmu_patchme
-spwin_mmu_patchme: b spwin_sun4c_stackchk
- andcc %sp, 0x7, %g0
+ b spwin_srmmu_stackchk
+ andcc %sp, 0x7, %g0
spwin_good_ustack:
/* LOCATION: Window to be saved */
@@ -306,73 +305,6 @@ spwin_bad_ustack_from_kernel:
* As noted above %curptr cannot be touched by this routine at all.
*/
-spwin_sun4c_stackchk:
- /* LOCATION: Window to be saved on the stack */
-
- /* See if the stack is in the address space hole but first,
- * check results of callers andcc %sp, 0x7, %g0
- */
- be 1f
- sra %sp, 29, %glob_tmp
-
- rd %psr, %glob_tmp
- b spwin_user_stack_is_bolixed + 0x4
- nop
-
-1:
- add %glob_tmp, 0x1, %glob_tmp
- andncc %glob_tmp, 0x1, %g0
- be 1f
- and %sp, 0xfff, %glob_tmp ! delay slot
-
- rd %psr, %glob_tmp
- b spwin_user_stack_is_bolixed + 0x4
- nop
-
- /* See if our dump area will be on more than one
- * page.
- */
-1:
- add %glob_tmp, 0x38, %glob_tmp
- andncc %glob_tmp, 0xff8, %g0
- be spwin_sun4c_onepage ! only one page to check
- lda [%sp] ASI_PTE, %glob_tmp ! have to check first page anyways
-
-spwin_sun4c_twopages:
- /* Is first page ok permission wise? */
- srl %glob_tmp, 29, %glob_tmp
- cmp %glob_tmp, 0x6
- be 1f
- add %sp, 0x38, %glob_tmp /* Is second page in vma hole? */
-
- rd %psr, %glob_tmp
- b spwin_user_stack_is_bolixed + 0x4
- nop
-
-1:
- sra %glob_tmp, 29, %glob_tmp
- add %glob_tmp, 0x1, %glob_tmp
- andncc %glob_tmp, 0x1, %g0
- be 1f
- add %sp, 0x38, %glob_tmp
-
- rd %psr, %glob_tmp
- b spwin_user_stack_is_bolixed + 0x4
- nop
-
-1:
- lda [%glob_tmp] ASI_PTE, %glob_tmp
-
-spwin_sun4c_onepage:
- srl %glob_tmp, 29, %glob_tmp
- cmp %glob_tmp, 0x6 ! can user write to it?
- be spwin_good_ustack ! success
- nop
-
- rd %psr, %glob_tmp
- b spwin_user_stack_is_bolixed + 0x4
- nop
-
/* This is a generic SRMMU routine. As far as I know this
* works for all current v8/srmmu implementations, we'll
* see...