diff options
Diffstat (limited to 'arch/sparc/kernel/wof.S')
-rw-r--r-- | arch/sparc/kernel/wof.S | 72 |
1 files changed, 2 insertions, 70 deletions
diff --git a/arch/sparc/kernel/wof.S b/arch/sparc/kernel/wof.S index 3bbcd8d..4c2de3c 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... |