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| author | Sam Ravnborg <sam@ravnborg.org> | 2012-05-11 13:35:10 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-12 04:27:50 +0200 |
| commit | 28de2f7339c5d5d972165a1fdc8510dcd8d3fead (patch) | |
| tree | 57ec82d3d348621ac18393d76835fd623273f827 | |
| parent | sparc32: delete pgtsun4c.h (diff) | |
| download | linux-28de2f7339c5d5d972165a1fdc8510dcd8d3fead.tar.xz linux-28de2f7339c5d5d972165a1fdc8510dcd8d3fead.zip | |
sparc32: drop sun4c specific stack validation
This allows us to kill run-time patching for this function too
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc/kernel/wuf.S | 60 | ||||
| -rw-r--r-- | arch/sparc/mm/srmmu.c | 1 |
2 files changed, 3 insertions, 58 deletions
diff --git a/arch/sparc/kernel/wuf.S b/arch/sparc/kernel/wuf.S index 779ff750603d..9fde91a249e0 100644 --- a/arch/sparc/kernel/wuf.S +++ b/arch/sparc/kernel/wuf.S @@ -131,12 +131,9 @@ fwin_from_user: /* LOCATION: Window 'W' */ - /* Branch to the architecture specific stack validation - * routine. They can be found below... - */ - .globl fwin_mmu_patchme -fwin_mmu_patchme: b sun4c_fwin_stackchk - andcc %sp, 0x7, %g0 + /* Branch to the stack validation routine */ + b srmmu_fwin_stackchk + andcc %sp, 0x7, %g0 #define STACK_OFFSET (THREAD_SIZE - TRACEREG_SZ - STACKFRAME_SZ) @@ -242,57 +239,6 @@ fwin_user_finish_up: * 'someone elses' window possibly. */ - .align 4 -sun4c_fwin_stackchk: - /* LOCATION: Window 'W' */ - - /* Caller did 'andcc %sp, 0x7, %g0' */ - be 1f - and %sp, 0xfff, %l0 ! delay slot - - b,a fwin_user_stack_is_bolixed - - /* See if we have to check the sanity of one page or two */ -1: - add %l0, 0x38, %l0 - sra %sp, 29, %l5 - add %l5, 0x1, %l5 - andncc %l5, 0x1, %g0 - be 1f - andncc %l0, 0xff8, %g0 - - b,a fwin_user_stack_is_bolixed /* %sp is in vma hole, yuck */ - -1: - be sun4c_fwin_onepage /* Only one page to check */ - lda [%sp] ASI_PTE, %l1 -sun4c_fwin_twopages: - add %sp, 0x38, %l0 - sra %l0, 29, %l5 - add %l5, 0x1, %l5 - andncc %l5, 0x1, %g0 - be 1f - lda [%l0] ASI_PTE, %l1 - - b,a fwin_user_stack_is_bolixed /* Second page in vma hole */ - -1: - srl %l1, 29, %l1 - andcc %l1, 0x4, %g0 - bne sun4c_fwin_onepage - lda [%sp] ASI_PTE, %l1 - - b,a fwin_user_stack_is_bolixed /* Second page has bad perms */ - -sun4c_fwin_onepage: - srl %l1, 29, %l1 - andcc %l1, 0x4, %g0 - bne fwin_user_stack_is_ok - nop - - /* A page had bad page permissions, losing... */ - b,a fwin_user_stack_is_bolixed - .globl srmmu_fwin_stackchk srmmu_fwin_stackchk: /* LOCATION: Window 'W' */ diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index 7fd4cc395cf8..d76af193b6b6 100644 --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -2145,7 +2145,6 @@ static void __init patch_window_trap_handlers(void) unsigned long *iaddr, *daddr; PATCH_BRANCH(spwin_mmu_patchme, spwin_srmmu_stackchk); - PATCH_BRANCH(fwin_mmu_patchme, srmmu_fwin_stackchk); PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk); PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk); } |