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@@ -1,8 +1,6 @@
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-/* $Id: winfixup.S,v 1.30 2002/02/09 19:49:30 davem Exp $
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+/* winfixup.S: Handle cases where user stack pointer is found to be bogus.
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*
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- * winfixup.S: Handle cases where user stack pointer is found to be bogus.
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- *
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- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
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+ * Copyright (C) 1997, 2006 David S. Miller (davem@davemloft.net)
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*/
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#include <asm/asi.h>
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@@ -15,367 +13,129 @@
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.text
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-set_pcontext:
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- sethi %hi(sparc64_kern_pri_context), %l1
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- ldx [%l1 + %lo(sparc64_kern_pri_context)], %l1
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- mov PRIMARY_CONTEXT, %g1
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- stxa %l1, [%g1] ASI_DMMU
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- sethi %hi(KERNBASE), %l1
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- flush %l1
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- retl
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- nop
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+ /* It used to be the case that these register window fault
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+ * handlers could run via the save and restore instructions
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+ * done by the trap entry and exit code. They now do the
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+ * window spill/fill by hand, so that case no longer can occur.
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+ */
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.align 32
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-
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- /* Here are the rules, pay attention.
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- *
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- * The kernel is disallowed from touching user space while
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- * the trap level is greater than zero, except for from within
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- * the window spill/fill handlers. This must be followed
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- * so that we can easily detect the case where we tried to
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- * spill/fill with a bogus (or unmapped) user stack pointer.
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- *
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- * These are layed out in a special way for cache reasons,
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- * don't touch...
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- */
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- .globl fill_fixup, spill_fixup
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fill_fixup:
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TRAP_LOAD_THREAD_REG(%g6, %g1)
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- rdpr %tstate, %g1
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- andcc %g1, TSTATE_PRIV, %g0
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- or %g4, FAULT_CODE_WINFIXUP, %g4
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- be,pt %xcc, window_scheisse_from_user_common
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- and %g1, TSTATE_CWP, %g1
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-
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- /* This is the extremely complex case, but it does happen from
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- * time to time if things are just right. Essentially the restore
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- * done in rtrap right before going back to user mode, with tl=1
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- * and that levels trap stack registers all setup, took a fill trap,
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- * the user stack was not mapped in the tlb, and tlb miss occurred,
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- * the pte found was not valid, and a simple ref bit watch update
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- * could not satisfy the miss, so we got here.
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- *
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- * We must carefully unwind the state so we get back to tl=0, preserve
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- * all the register values we were going to give to the user. Luckily
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- * most things are where they need to be, we also have the address
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- * which triggered the fault handy as well.
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- *
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- * Also note that we must preserve %l5 and %l6. If the user was
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- * returning from a system call, we must make it look this way
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- * after we process the fill fault on the users stack.
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- *
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- * First, get into the window where the original restore was executed.
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- */
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-
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- rdpr %wstate, %g2 ! Grab user mode wstate.
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- wrpr %g1, %cwp ! Get into the right window.
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- sll %g2, 3, %g2 ! NORMAL-->OTHER
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-
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- wrpr %g0, 0x0, %canrestore ! Standard etrap stuff.
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- wrpr %g2, 0x0, %wstate ! This must be consistent.
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- wrpr %g0, 0x0, %otherwin ! We know this.
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- call set_pcontext ! Change contexts...
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+ rdpr %tstate, %g1
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+ and %g1, TSTATE_CWP, %g1
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+ or %g4, FAULT_CODE_WINFIXUP, %g4
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+ stb %g4, [%g6 + TI_FAULT_CODE]
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+ stx %g5, [%g6 + TI_FAULT_ADDR]
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+ wrpr %g1, %cwp
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+ ba,pt %xcc, etrap
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+ rd %pc, %g7
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+ call do_sparc64_fault
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+ add %sp, PTREGS_OFF, %o0
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+ ba,pt %xcc, rtrap_clr_l6
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nop
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- rdpr %pstate, %l1 ! Prepare to change globals.
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- mov %g6, %o7 ! Get current.
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-
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- andn %l1, PSTATE_MM, %l1 ! We want to be in RMO
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- stb %g4, [%g6 + TI_FAULT_CODE]
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- stx %g5, [%g6 + TI_FAULT_ADDR]
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- wrpr %g0, 0x0, %tl ! Out of trap levels.
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- wrpr %l1, (PSTATE_IE | PSTATE_AG | PSTATE_RMO), %pstate
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- mov %o7, %g6
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- ldx [%g6 + TI_TASK], %g4
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- LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3)
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- /* This is the same as below, except we handle this a bit special
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- * since we must preserve %l5 and %l6, see comment above.
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- */
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- call do_sparc64_fault
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- add %sp, PTREGS_OFF, %o0
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- ba,pt %xcc, rtrap
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- nop ! yes, nop is correct
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-
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- /* Be very careful about usage of the alternate globals here.
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- * You cannot touch %g4/%g5 as that has the fault information
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- * should this be from usermode. Also be careful for the case
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- * where we get here from the save instruction in etrap.S when
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- * coming from either user or kernel (does not matter which, it
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- * is the same problem in both cases). Essentially this means
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- * do not touch %g7 or %g2 so we handle the two cases fine.
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+ /* Be very careful about usage of the trap globals here.
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+ * You cannot touch %g5 as that has the fault information.
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*/
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spill_fixup:
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+spill_fixup_mna:
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+spill_fixup_dax:
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TRAP_LOAD_THREAD_REG(%g6, %g1)
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- ldx [%g6 + TI_FLAGS], %g1
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- andcc %g1, _TIF_32BIT, %g0
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- ldub [%g6 + TI_WSAVED], %g1
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-
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- sll %g1, 3, %g3
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- add %g6, %g3, %g3
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- stx %sp, [%g3 + TI_RWIN_SPTRS]
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- sll %g1, 7, %g3
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- bne,pt %xcc, 1f
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- add %g6, %g3, %g3
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- stx %l0, [%g3 + TI_REG_WINDOW + 0x00]
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- stx %l1, [%g3 + TI_REG_WINDOW + 0x08]
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-
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- stx %l2, [%g3 + TI_REG_WINDOW + 0x10]
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- stx %l3, [%g3 + TI_REG_WINDOW + 0x18]
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- stx %l4, [%g3 + TI_REG_WINDOW + 0x20]
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- stx %l5, [%g3 + TI_REG_WINDOW + 0x28]
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- stx %l6, [%g3 + TI_REG_WINDOW + 0x30]
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- stx %l7, [%g3 + TI_REG_WINDOW + 0x38]
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- stx %i0, [%g3 + TI_REG_WINDOW + 0x40]
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- stx %i1, [%g3 + TI_REG_WINDOW + 0x48]
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-
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- stx %i2, [%g3 + TI_REG_WINDOW + 0x50]
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- stx %i3, [%g3 + TI_REG_WINDOW + 0x58]
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- stx %i4, [%g3 + TI_REG_WINDOW + 0x60]
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- stx %i5, [%g3 + TI_REG_WINDOW + 0x68]
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- stx %i6, [%g3 + TI_REG_WINDOW + 0x70]
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- b,pt %xcc, 2f
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- stx %i7, [%g3 + TI_REG_WINDOW + 0x78]
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-1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00]
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-
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- stw %l1, [%g3 + TI_REG_WINDOW + 0x04]
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- stw %l2, [%g3 + TI_REG_WINDOW + 0x08]
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- stw %l3, [%g3 + TI_REG_WINDOW + 0x0c]
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- stw %l4, [%g3 + TI_REG_WINDOW + 0x10]
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- stw %l5, [%g3 + TI_REG_WINDOW + 0x14]
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- stw %l6, [%g3 + TI_REG_WINDOW + 0x18]
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- stw %l7, [%g3 + TI_REG_WINDOW + 0x1c]
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- stw %i0, [%g3 + TI_REG_WINDOW + 0x20]
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-
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- stw %i1, [%g3 + TI_REG_WINDOW + 0x24]
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- stw %i2, [%g3 + TI_REG_WINDOW + 0x28]
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- stw %i3, [%g3 + TI_REG_WINDOW + 0x2c]
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- stw %i4, [%g3 + TI_REG_WINDOW + 0x30]
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- stw %i5, [%g3 + TI_REG_WINDOW + 0x34]
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- stw %i6, [%g3 + TI_REG_WINDOW + 0x38]
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- stw %i7, [%g3 + TI_REG_WINDOW + 0x3c]
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-2: add %g1, 1, %g1
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-
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- stb %g1, [%g6 + TI_WSAVED]
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- rdpr %tstate, %g1
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- andcc %g1, TSTATE_PRIV, %g0
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+ ldx [%g6 + TI_FLAGS], %g1
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+ andcc %g1, _TIF_32BIT, %g0
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+ ldub [%g6 + TI_WSAVED], %g1
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+ sll %g1, 3, %g3
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+ add %g6, %g3, %g3
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+ stx %sp, [%g3 + TI_RWIN_SPTRS]
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+ sll %g1, 7, %g3
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+ bne,pt %xcc, 1f
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+ add %g6, %g3, %g3
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+ stx %l0, [%g3 + TI_REG_WINDOW + 0x00]
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+ stx %l1, [%g3 + TI_REG_WINDOW + 0x08]
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+ stx %l2, [%g3 + TI_REG_WINDOW + 0x10]
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+ stx %l3, [%g3 + TI_REG_WINDOW + 0x18]
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+ stx %l4, [%g3 + TI_REG_WINDOW + 0x20]
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+ stx %l5, [%g3 + TI_REG_WINDOW + 0x28]
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+ stx %l6, [%g3 + TI_REG_WINDOW + 0x30]
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+ stx %l7, [%g3 + TI_REG_WINDOW + 0x38]
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+ stx %i0, [%g3 + TI_REG_WINDOW + 0x40]
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+ stx %i1, [%g3 + TI_REG_WINDOW + 0x48]
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+ stx %i2, [%g3 + TI_REG_WINDOW + 0x50]
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+ stx %i3, [%g3 + TI_REG_WINDOW + 0x58]
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+ stx %i4, [%g3 + TI_REG_WINDOW + 0x60]
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+ stx %i5, [%g3 + TI_REG_WINDOW + 0x68]
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+ stx %i6, [%g3 + TI_REG_WINDOW + 0x70]
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+ ba,pt %xcc, 2f
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+ stx %i7, [%g3 + TI_REG_WINDOW + 0x78]
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+1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00]
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+ stw %l1, [%g3 + TI_REG_WINDOW + 0x04]
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+ stw %l2, [%g3 + TI_REG_WINDOW + 0x08]
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+ stw %l3, [%g3 + TI_REG_WINDOW + 0x0c]
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+ stw %l4, [%g3 + TI_REG_WINDOW + 0x10]
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+ stw %l5, [%g3 + TI_REG_WINDOW + 0x14]
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+ stw %l6, [%g3 + TI_REG_WINDOW + 0x18]
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+ stw %l7, [%g3 + TI_REG_WINDOW + 0x1c]
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+ stw %i0, [%g3 + TI_REG_WINDOW + 0x20]
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+ stw %i1, [%g3 + TI_REG_WINDOW + 0x24]
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+ stw %i2, [%g3 + TI_REG_WINDOW + 0x28]
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+ stw %i3, [%g3 + TI_REG_WINDOW + 0x2c]
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+ stw %i4, [%g3 + TI_REG_WINDOW + 0x30]
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+ stw %i5, [%g3 + TI_REG_WINDOW + 0x34]
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+ stw %i6, [%g3 + TI_REG_WINDOW + 0x38]
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+ stw %i7, [%g3 + TI_REG_WINDOW + 0x3c]
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+2: add %g1, 1, %g1
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+ stb %g1, [%g6 + TI_WSAVED]
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+ rdpr %tstate, %g1
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+ andcc %g1, TSTATE_PRIV, %g0
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saved
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- and %g1, TSTATE_CWP, %g1
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- be,a,pn %xcc, window_scheisse_from_user_common
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- mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4
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+ be,pn %xcc, 1f
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+ and %g1, TSTATE_CWP, %g1
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retry
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+1: mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4
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+ stb %g4, [%g6 + TI_FAULT_CODE]
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+ stx %g5, [%g6 + TI_FAULT_ADDR]
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+ wrpr %g1, %cwp
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+ ba,pt %xcc, etrap
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+ rd %pc, %g7
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+ call do_sparc64_fault
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+ add %sp, PTREGS_OFF, %o0
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+ ba,a,pt %xcc, rtrap_clr_l6
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-window_scheisse_from_user_common:
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- stb %g4, [%g6 + TI_FAULT_CODE]
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- stx %g5, [%g6 + TI_FAULT_ADDR]
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- wrpr %g1, %cwp
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- ba,pt %xcc, etrap
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- rd %pc, %g7
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- call do_sparc64_fault
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- add %sp, PTREGS_OFF, %o0
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- ba,a,pt %xcc, rtrap_clr_l6
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-
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- .globl winfix_mna, fill_fixup_mna, spill_fixup_mna
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winfix_mna:
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- andn %g3, 0x7f, %g3
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- add %g3, 0x78, %g3
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- wrpr %g3, %tnpc
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+ andn %g3, 0x7f, %g3
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+ add %g3, 0x78, %g3
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+ wrpr %g3, %tnpc
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done
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-fill_fixup_mna:
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- TRAP_LOAD_THREAD_REG(%g6, %g1)
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- rdpr %tstate, %g1
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- andcc %g1, TSTATE_PRIV, %g0
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- be,pt %xcc, window_mna_from_user_common
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- and %g1, TSTATE_CWP, %g1
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-
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- /* Please, see fill_fixup commentary about why we must preserve
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- * %l5 and %l6 to preserve absolute correct semantics.
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- */
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- rdpr %wstate, %g2 ! Grab user mode wstate.
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- wrpr %g1, %cwp ! Get into the right window.
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- sll %g2, 3, %g2 ! NORMAL-->OTHER
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- wrpr %g0, 0x0, %canrestore ! Standard etrap stuff.
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-
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- wrpr %g2, 0x0, %wstate ! This must be consistent.
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- wrpr %g0, 0x0, %otherwin ! We know this.
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- call set_pcontext ! Change contexts...
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- nop
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- rdpr %pstate, %l1 ! Prepare to change globals.
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- mov %g4, %o2 ! Setup args for
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- mov %g5, %o1 ! final call to mem_address_unaligned.
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- andn %l1, PSTATE_MM, %l1 ! We want to be in RMO
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-
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- mov %g6, %o7 ! Stash away current.
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- wrpr %g0, 0x0, %tl ! Out of trap levels.
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- wrpr %l1, (PSTATE_IE | PSTATE_AG | PSTATE_RMO), %pstate
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- mov %o7, %g6 ! Get current back.
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- ldx [%g6 + TI_TASK], %g4 ! Finish it.
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- LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3)
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- call mem_address_unaligned
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- add %sp, PTREGS_OFF, %o0
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- b,pt %xcc, rtrap
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- nop ! yes, the nop is correct
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-spill_fixup_mna:
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+fill_fixup_mna:
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TRAP_LOAD_THREAD_REG(%g6, %g1)
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- ldx [%g6 + TI_FLAGS], %g1
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- andcc %g1, _TIF_32BIT, %g0
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- ldub [%g6 + TI_WSAVED], %g1
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- sll %g1, 3, %g3
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- add %g6, %g3, %g3
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- stx %sp, [%g3 + TI_RWIN_SPTRS]
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-
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- sll %g1, 7, %g3
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- bne,pt %xcc, 1f
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- add %g6, %g3, %g3
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- stx %l0, [%g3 + TI_REG_WINDOW + 0x00]
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- stx %l1, [%g3 + TI_REG_WINDOW + 0x08]
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- stx %l2, [%g3 + TI_REG_WINDOW + 0x10]
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- stx %l3, [%g3 + TI_REG_WINDOW + 0x18]
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- stx %l4, [%g3 + TI_REG_WINDOW + 0x20]
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-
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- stx %l5, [%g3 + TI_REG_WINDOW + 0x28]
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- stx %l6, [%g3 + TI_REG_WINDOW + 0x30]
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- stx %l7, [%g3 + TI_REG_WINDOW + 0x38]
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- stx %i0, [%g3 + TI_REG_WINDOW + 0x40]
|
|
|
- stx %i1, [%g3 + TI_REG_WINDOW + 0x48]
|
|
|
- stx %i2, [%g3 + TI_REG_WINDOW + 0x50]
|
|
|
- stx %i3, [%g3 + TI_REG_WINDOW + 0x58]
|
|
|
- stx %i4, [%g3 + TI_REG_WINDOW + 0x60]
|
|
|
-
|
|
|
- stx %i5, [%g3 + TI_REG_WINDOW + 0x68]
|
|
|
- stx %i6, [%g3 + TI_REG_WINDOW + 0x70]
|
|
|
- stx %i7, [%g3 + TI_REG_WINDOW + 0x78]
|
|
|
- b,pt %xcc, 2f
|
|
|
- add %g1, 1, %g1
|
|
|
-1: std %l0, [%g3 + TI_REG_WINDOW + 0x00]
|
|
|
- std %l2, [%g3 + TI_REG_WINDOW + 0x08]
|
|
|
- std %l4, [%g3 + TI_REG_WINDOW + 0x10]
|
|
|
+ rdpr %tstate, %g1
|
|
|
+ and %g1, TSTATE_CWP, %g1
|
|
|
+ wrpr %g1, %cwp
|
|
|
+ ba,pt %xcc, etrap
|
|
|
+ rd %pc, %g7
|
|
|
+ mov %l4, %o2
|
|
|
+ mov %l5, %o1
|
|
|
+ call mem_address_unaligned
|
|
|
+ add %sp, PTREGS_OFF, %o0
|
|
|
+ ba,a,pt %xcc, rtrap_clr_l6
|
|
|
|
|
|
- std %l6, [%g3 + TI_REG_WINDOW + 0x18]
|
|
|
- std %i0, [%g3 + TI_REG_WINDOW + 0x20]
|
|
|
- std %i2, [%g3 + TI_REG_WINDOW + 0x28]
|
|
|
- std %i4, [%g3 + TI_REG_WINDOW + 0x30]
|
|
|
- std %i6, [%g3 + TI_REG_WINDOW + 0x38]
|
|
|
- add %g1, 1, %g1
|
|
|
-2: stb %g1, [%g6 + TI_WSAVED]
|
|
|
- rdpr %tstate, %g1
|
|
|
-
|
|
|
- andcc %g1, TSTATE_PRIV, %g0
|
|
|
- saved
|
|
|
- be,pn %xcc, window_mna_from_user_common
|
|
|
- and %g1, TSTATE_CWP, %g1
|
|
|
- retry
|
|
|
-window_mna_from_user_common:
|
|
|
- wrpr %g1, %cwp
|
|
|
- sethi %hi(109f), %g7
|
|
|
- ba,pt %xcc, etrap
|
|
|
-109: or %g7, %lo(109b), %g7
|
|
|
- mov %l4, %o2
|
|
|
- mov %l5, %o1
|
|
|
- call mem_address_unaligned
|
|
|
- add %sp, PTREGS_OFF, %o0
|
|
|
- ba,pt %xcc, rtrap
|
|
|
- clr %l6
|
|
|
-
|
|
|
- .globl winfix_dax, fill_fixup_dax, spill_fixup_dax
|
|
|
winfix_dax:
|
|
|
- andn %g3, 0x7f, %g3
|
|
|
- add %g3, 0x74, %g3
|
|
|
- wrpr %g3, %tnpc
|
|
|
+ andn %g3, 0x7f, %g3
|
|
|
+ add %g3, 0x74, %g3
|
|
|
+ wrpr %g3, %tnpc
|
|
|
done
|
|
|
-fill_fixup_dax:
|
|
|
- TRAP_LOAD_THREAD_REG(%g6, %g1)
|
|
|
- rdpr %tstate, %g1
|
|
|
- andcc %g1, TSTATE_PRIV, %g0
|
|
|
- be,pt %xcc, window_dax_from_user_common
|
|
|
- and %g1, TSTATE_CWP, %g1
|
|
|
-
|
|
|
- /* Please, see fill_fixup commentary about why we must preserve
|
|
|
- * %l5 and %l6 to preserve absolute correct semantics.
|
|
|
- */
|
|
|
- rdpr %wstate, %g2 ! Grab user mode wstate.
|
|
|
- wrpr %g1, %cwp ! Get into the right window.
|
|
|
- sll %g2, 3, %g2 ! NORMAL-->OTHER
|
|
|
- wrpr %g0, 0x0, %canrestore ! Standard etrap stuff.
|
|
|
-
|
|
|
- wrpr %g2, 0x0, %wstate ! This must be consistent.
|
|
|
- wrpr %g0, 0x0, %otherwin ! We know this.
|
|
|
- call set_pcontext ! Change contexts...
|
|
|
- nop
|
|
|
- rdpr %pstate, %l1 ! Prepare to change globals.
|
|
|
- mov %g4, %o1 ! Setup args for
|
|
|
- mov %g5, %o2 ! final call to spitfire_data_access_exception.
|
|
|
- andn %l1, PSTATE_MM, %l1 ! We want to be in RMO
|
|
|
-
|
|
|
- mov %g6, %o7 ! Stash away current.
|
|
|
- wrpr %g0, 0x0, %tl ! Out of trap levels.
|
|
|
- wrpr %l1, (PSTATE_IE | PSTATE_AG | PSTATE_RMO), %pstate
|
|
|
- mov %o7, %g6 ! Get current back.
|
|
|
- ldx [%g6 + TI_TASK], %g4 ! Finish it.
|
|
|
- LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3)
|
|
|
- call spitfire_data_access_exception
|
|
|
- add %sp, PTREGS_OFF, %o0
|
|
|
|
|
|
- b,pt %xcc, rtrap
|
|
|
- nop ! yes, the nop is correct
|
|
|
-spill_fixup_dax:
|
|
|
+fill_fixup_dax:
|
|
|
TRAP_LOAD_THREAD_REG(%g6, %g1)
|
|
|
- ldx [%g6 + TI_FLAGS], %g1
|
|
|
- andcc %g1, _TIF_32BIT, %g0
|
|
|
- ldub [%g6 + TI_WSAVED], %g1
|
|
|
- sll %g1, 3, %g3
|
|
|
- add %g6, %g3, %g3
|
|
|
- stx %sp, [%g3 + TI_RWIN_SPTRS]
|
|
|
-
|
|
|
- sll %g1, 7, %g3
|
|
|
- bne,pt %xcc, 1f
|
|
|
- add %g6, %g3, %g3
|
|
|
- stx %l0, [%g3 + TI_REG_WINDOW + 0x00]
|
|
|
- stx %l1, [%g3 + TI_REG_WINDOW + 0x08]
|
|
|
- stx %l2, [%g3 + TI_REG_WINDOW + 0x10]
|
|
|
- stx %l3, [%g3 + TI_REG_WINDOW + 0x18]
|
|
|
- stx %l4, [%g3 + TI_REG_WINDOW + 0x20]
|
|
|
-
|
|
|
- stx %l5, [%g3 + TI_REG_WINDOW + 0x28]
|
|
|
- stx %l6, [%g3 + TI_REG_WINDOW + 0x30]
|
|
|
- stx %l7, [%g3 + TI_REG_WINDOW + 0x38]
|
|
|
- stx %i0, [%g3 + TI_REG_WINDOW + 0x40]
|
|
|
- stx %i1, [%g3 + TI_REG_WINDOW + 0x48]
|
|
|
- stx %i2, [%g3 + TI_REG_WINDOW + 0x50]
|
|
|
- stx %i3, [%g3 + TI_REG_WINDOW + 0x58]
|
|
|
- stx %i4, [%g3 + TI_REG_WINDOW + 0x60]
|
|
|
-
|
|
|
- stx %i5, [%g3 + TI_REG_WINDOW + 0x68]
|
|
|
- stx %i6, [%g3 + TI_REG_WINDOW + 0x70]
|
|
|
- stx %i7, [%g3 + TI_REG_WINDOW + 0x78]
|
|
|
- b,pt %xcc, 2f
|
|
|
- add %g1, 1, %g1
|
|
|
-1: std %l0, [%g3 + TI_REG_WINDOW + 0x00]
|
|
|
- std %l2, [%g3 + TI_REG_WINDOW + 0x08]
|
|
|
- std %l4, [%g3 + TI_REG_WINDOW + 0x10]
|
|
|
-
|
|
|
- std %l6, [%g3 + TI_REG_WINDOW + 0x18]
|
|
|
- std %i0, [%g3 + TI_REG_WINDOW + 0x20]
|
|
|
- std %i2, [%g3 + TI_REG_WINDOW + 0x28]
|
|
|
- std %i4, [%g3 + TI_REG_WINDOW + 0x30]
|
|
|
- std %i6, [%g3 + TI_REG_WINDOW + 0x38]
|
|
|
- add %g1, 1, %g1
|
|
|
-2: stb %g1, [%g6 + TI_WSAVED]
|
|
|
- rdpr %tstate, %g1
|
|
|
-
|
|
|
- andcc %g1, TSTATE_PRIV, %g0
|
|
|
- saved
|
|
|
- be,pn %xcc, window_dax_from_user_common
|
|
|
- and %g1, TSTATE_CWP, %g1
|
|
|
- retry
|
|
|
-window_dax_from_user_common:
|
|
|
- wrpr %g1, %cwp
|
|
|
- sethi %hi(109f), %g7
|
|
|
- ba,pt %xcc, etrap
|
|
|
-109: or %g7, %lo(109b), %g7
|
|
|
- mov %l4, %o1
|
|
|
- mov %l5, %o2
|
|
|
- call spitfire_data_access_exception
|
|
|
- add %sp, PTREGS_OFF, %o0
|
|
|
- ba,pt %xcc, rtrap
|
|
|
- clr %l6
|
|
|
+ rdpr %tstate, %g1
|
|
|
+ and %g1, TSTATE_CWP, %g1
|
|
|
+ wrpr %g1, %cwp
|
|
|
+ ba,pt %xcc, etrap
|
|
|
+ rd %pc, %g7
|
|
|
+ mov %l4, %o1
|
|
|
+ mov %l5, %o2
|
|
|
+ call spitfire_data_access_exception
|
|
|
+ add %sp, PTREGS_OFF, %o0
|
|
|
+ ba,a,pt %xcc, rtrap_clr_l6
|