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| author | Sam Ravnborg <sam@ravnborg.org> | 2012-05-11 15:35:13 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-12 06:27:52 +0400 |
| commit | ef136bc91e3a98d34f32d85ab0c79de67b4f6f87 (patch) | |
| tree | 6455e0125f740e5afdb18d3c11daf2b9c2c44729 /arch/sparc/kernel/rtrap_32.S | |
| parent | e098ff92f65048ce327927c0ce3daed0ef34988f (diff) | |
| download | linux-ef136bc91e3a98d34f32d85ab0c79de67b4f6f87.tar.xz | |
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/rtrap_32.S')
| -rw-r--r-- | arch/sparc/kernel/rtrap_32.S | 76 |
1 files changed, 6 insertions, 70 deletions
diff --git a/arch/sparc/kernel/rtrap_32.S b/arch/sparc/kernel/rtrap_32.S index 5f5f74c2c2ca..7abc24e2bf1a 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 |