mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
160 lines
3.9 KiB
160 lines
3.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* winfixup.S: Handle cases where user stack pointer is found to be bogus. |
|
* |
|
* Copyright (C) 1997, 2006 David S. Miller (davem@davemloft.net) |
|
*/ |
|
|
|
#include <asm/asi.h> |
|
#include <asm/head.h> |
|
#include <asm/page.h> |
|
#include <asm/ptrace.h> |
|
#include <asm/processor.h> |
|
#include <asm/spitfire.h> |
|
#include <asm/thread_info.h> |
|
|
|
.text |
|
|
|
/* It used to be the case that these register window fault |
|
* handlers could run via the save and restore instructions |
|
* done by the trap entry and exit code. They now do the |
|
* window spill/fill by hand, so that case no longer can occur. |
|
*/ |
|
|
|
.align 32 |
|
fill_fixup: |
|
TRAP_LOAD_THREAD_REG(%g6, %g1) |
|
rdpr %tstate, %g1 |
|
and %g1, TSTATE_CWP, %g1 |
|
or %g4, FAULT_CODE_WINFIXUP, %g4 |
|
stb %g4, [%g6 + TI_FAULT_CODE] |
|
stx %g5, [%g6 + TI_FAULT_ADDR] |
|
wrpr %g1, %cwp |
|
ba,pt %xcc, etrap |
|
rd %pc, %g7 |
|
call do_sparc64_fault |
|
add %sp, PTREGS_OFF, %o0 |
|
ba,a,pt %xcc, rtrap |
|
|
|
/* Be very careful about usage of the trap globals here. |
|
* You cannot touch %g5 as that has the fault information. |
|
*/ |
|
spill_fixup: |
|
spill_fixup_mna: |
|
spill_fixup_dax: |
|
TRAP_LOAD_THREAD_REG(%g6, %g1) |
|
ldx [%g6 + TI_FLAGS], %g1 |
|
andcc %sp, 0x1, %g0 |
|
movne %icc, 0, %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] |
|
ba,pt %xcc, 2f |
|
stx %i7, [%g3 + TI_REG_WINDOW + 0x78] |
|
1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00] |
|
stw %l1, [%g3 + TI_REG_WINDOW + 0x04] |
|
stw %l2, [%g3 + TI_REG_WINDOW + 0x08] |
|
stw %l3, [%g3 + TI_REG_WINDOW + 0x0c] |
|
stw %l4, [%g3 + TI_REG_WINDOW + 0x10] |
|
stw %l5, [%g3 + TI_REG_WINDOW + 0x14] |
|
stw %l6, [%g3 + TI_REG_WINDOW + 0x18] |
|
stw %l7, [%g3 + TI_REG_WINDOW + 0x1c] |
|
stw %i0, [%g3 + TI_REG_WINDOW + 0x20] |
|
stw %i1, [%g3 + TI_REG_WINDOW + 0x24] |
|
stw %i2, [%g3 + TI_REG_WINDOW + 0x28] |
|
stw %i3, [%g3 + TI_REG_WINDOW + 0x2c] |
|
stw %i4, [%g3 + TI_REG_WINDOW + 0x30] |
|
stw %i5, [%g3 + TI_REG_WINDOW + 0x34] |
|
stw %i6, [%g3 + TI_REG_WINDOW + 0x38] |
|
stw %i7, [%g3 + TI_REG_WINDOW + 0x3c] |
|
2: add %g1, 1, %g1 |
|
stb %g1, [%g6 + TI_WSAVED] |
|
rdpr %tstate, %g1 |
|
andcc %g1, TSTATE_PRIV, %g0 |
|
saved |
|
be,pn %xcc, 1f |
|
and %g1, TSTATE_CWP, %g1 |
|
retry |
|
1: mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4 |
|
stb %g4, [%g6 + TI_FAULT_CODE] |
|
stx %g5, [%g6 + TI_FAULT_ADDR] |
|
wrpr %g1, %cwp |
|
ba,pt %xcc, etrap |
|
rd %pc, %g7 |
|
call do_sparc64_fault |
|
add %sp, PTREGS_OFF, %o0 |
|
ba,a,pt %xcc, rtrap |
|
|
|
winfix_mna: |
|
andn %g3, 0x7f, %g3 |
|
add %g3, 0x78, %g3 |
|
wrpr %g3, %tnpc |
|
done |
|
|
|
fill_fixup_mna: |
|
rdpr %tstate, %g1 |
|
and %g1, TSTATE_CWP, %g1 |
|
wrpr %g1, %cwp |
|
ba,pt %xcc, etrap |
|
rd %pc, %g7 |
|
sethi %hi(tlb_type), %g1 |
|
lduw [%g1 + %lo(tlb_type)], %g1 |
|
cmp %g1, 3 |
|
bne,pt %icc, 1f |
|
add %sp, PTREGS_OFF, %o0 |
|
mov %l4, %o2 |
|
call sun4v_do_mna |
|
mov %l5, %o1 |
|
ba,a,pt %xcc, rtrap |
|
1: mov %l4, %o1 |
|
mov %l5, %o2 |
|
call mem_address_unaligned |
|
nop |
|
ba,a,pt %xcc, rtrap |
|
|
|
winfix_dax: |
|
andn %g3, 0x7f, %g3 |
|
add %g3, 0x74, %g3 |
|
wrpr %g3, %tnpc |
|
done |
|
|
|
fill_fixup_dax: |
|
rdpr %tstate, %g1 |
|
and %g1, TSTATE_CWP, %g1 |
|
wrpr %g1, %cwp |
|
ba,pt %xcc, etrap |
|
rd %pc, %g7 |
|
sethi %hi(tlb_type), %g1 |
|
mov %l4, %o1 |
|
lduw [%g1 + %lo(tlb_type)], %g1 |
|
mov %l5, %o2 |
|
cmp %g1, 3 |
|
bne,pt %icc, 1f |
|
add %sp, PTREGS_OFF, %o0 |
|
call sun4v_data_access_exception |
|
nop |
|
ba,a,pt %xcc, rtrap |
|
nop |
|
1: call spitfire_data_access_exception |
|
nop |
|
ba,a,pt %xcc, rtrap |
|
nop
|
|
|