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authorSam Ravnborg <sam@ravnborg.org>2012-05-11 11:35:13 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-11 19:27:52 -0700
commitef136bc91e3a98d34f32d85ab0c79de67b4f6f87 (patch)
tree6455e0125f740e5afdb18d3c11daf2b9c2c44729 /arch/sparc/kernel
parente098ff92f65048ce327927c0ce3daed0ef34988f (diff)
downloadlinux-ef136bc91e3a98d34f32d85ab0c79de67b4f6f87.tar.gz
sparc32: drop sun4c user stack checking routine
With this we no longer do any run-time patchings of traps. So drop the function + macro to support this. 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/rtrap_32.S76
1 files changed, 6 insertions, 70 deletions
diff --git a/arch/sparc/kernel/rtrap_32.S b/arch/sparc/kernel/rtrap_32.S
index 5f5f74c2c2c..7abc24e2bf1 100644
--- a/arch/sparc/kernel/rtrap_32.S
+++ b/arch/sparc/kernel/rtrap_32.S
@@ -128,13 +128,12 @@ rtrap_patch2: and %glob_tmp, 0xff, %glob_tmp
wr %glob_tmp, 0x0, %wim
- /* Here comes the architecture specific
- * branch to the user stack checking routine
- * for return from traps.
- */
- .globl rtrap_mmu_patchme
-rtrap_mmu_patchme: b sun4c_rett_stackchk
- andcc %fp, 0x7, %g0
+ /* Here comes the architecture specific
+ * branch to the user stack checking routine
+ * for return from traps.
+ */
+ b srmmu_rett_stackchk
+ andcc %fp, 0x7, %g0
ret_trap_userwins_ok:
LOAD_PT_PRIV(sp, t_psr, t_pc, t_npc)
@@ -225,69 +224,6 @@ ret_trap_user_stack_is_bolixed:
b signal_p
ld [%curptr + TI_FLAGS], %g2
-sun4c_rett_stackchk:
- be 1f
- and %fp, 0xfff, %g1 ! delay slot
-
- b ret_trap_user_stack_is_bolixed + 0x4
- wr %t_wim, 0x0, %wim
-
- /* See if we have to check the sanity of one page or two */
-1:
- add %g1, 0x38, %g1
- sra %fp, 29, %g2
- add %g2, 0x1, %g2
- andncc %g2, 0x1, %g0
- be 1f
- andncc %g1, 0xff8, %g0
-
- /* %sp is in vma hole, yuck */
- b ret_trap_user_stack_is_bolixed + 0x4
- wr %t_wim, 0x0, %wim
-
-1:
- be sun4c_rett_onepage /* Only one page to check */
- lda [%fp] ASI_PTE, %g2
-
-sun4c_rett_twopages:
- add %fp, 0x38, %g1
- sra %g1, 29, %g2
- add %g2, 0x1, %g2
- andncc %g2, 0x1, %g0
- be 1f
- lda [%g1] ASI_PTE, %g2
-
- /* Second page is in vma hole */
- b ret_trap_user_stack_is_bolixed + 0x4
- wr %t_wim, 0x0, %wim
-
-1:
- srl %g2, 29, %g2
- andcc %g2, 0x4, %g0
- bne sun4c_rett_onepage
- lda [%fp] ASI_PTE, %g2
-
- /* Second page has bad perms */
- b ret_trap_user_stack_is_bolixed + 0x4
- wr %t_wim, 0x0, %wim
-
-sun4c_rett_onepage:
- srl %g2, 29, %g2
- andcc %g2, 0x4, %g0
- bne,a 1f
- restore %g0, %g0, %g0
-
- /* A page had bad page permissions, losing... */
- b ret_trap_user_stack_is_bolixed + 0x4
- wr %t_wim, 0x0, %wim
-
- /* Whee, things are ok, load the window and continue. */
-1:
- LOAD_WINDOW(sp)
-
- b ret_trap_userwins_ok
- save %g0, %g0, %g0
-
.globl srmmu_rett_stackchk
srmmu_rett_stackchk:
bne ret_trap_user_stack_is_bolixed