1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* winfixup.S: Handle cases where user stack pointer is found to be bogus.
4 * Copyright (C) 1997, 2006 David S. Miller (davem@davemloft.net)
10 #include <asm/ptrace.h>
11 #include <asm/processor.h>
12 #include <asm/spitfire.h>
13 #include <asm/thread_info.h>
17 /* It used to be the case that these register window fault
18 * handlers could run via the save and restore instructions
19 * done by the trap entry and exit code. They now do the
20 * window spill/fill by hand, so that case no longer can occur.
25 TRAP_LOAD_THREAD_REG(%g6, %g1)
27 and %g1, TSTATE_CWP, %g1
28 or %g4, FAULT_CODE_WINFIXUP, %g4
29 stb %g4, [%g6 + TI_FAULT_CODE]
30 stx %g5, [%g6 + TI_FAULT_ADDR]
35 add %sp, PTREGS_OFF, %o0
38 /* Be very careful about usage of the trap globals here.
39 * You cannot touch %g5 as that has the fault information.
44 TRAP_LOAD_THREAD_REG(%g6, %g1)
45 ldx [%g6 + TI_FLAGS], %g1
48 andcc %g1, _TIF_32BIT, %g0
49 ldub [%g6 + TI_WSAVED], %g1
52 stx %sp, [%g3 + TI_RWIN_SPTRS]
56 stx %l0, [%g3 + TI_REG_WINDOW + 0x00]
57 stx %l1, [%g3 + TI_REG_WINDOW + 0x08]
58 stx %l2, [%g3 + TI_REG_WINDOW + 0x10]
59 stx %l3, [%g3 + TI_REG_WINDOW + 0x18]
60 stx %l4, [%g3 + TI_REG_WINDOW + 0x20]
61 stx %l5, [%g3 + TI_REG_WINDOW + 0x28]
62 stx %l6, [%g3 + TI_REG_WINDOW + 0x30]
63 stx %l7, [%g3 + TI_REG_WINDOW + 0x38]
64 stx %i0, [%g3 + TI_REG_WINDOW + 0x40]
65 stx %i1, [%g3 + TI_REG_WINDOW + 0x48]
66 stx %i2, [%g3 + TI_REG_WINDOW + 0x50]
67 stx %i3, [%g3 + TI_REG_WINDOW + 0x58]
68 stx %i4, [%g3 + TI_REG_WINDOW + 0x60]
69 stx %i5, [%g3 + TI_REG_WINDOW + 0x68]
70 stx %i6, [%g3 + TI_REG_WINDOW + 0x70]
72 stx %i7, [%g3 + TI_REG_WINDOW + 0x78]
73 1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00]
74 stw %l1, [%g3 + TI_REG_WINDOW + 0x04]
75 stw %l2, [%g3 + TI_REG_WINDOW + 0x08]
76 stw %l3, [%g3 + TI_REG_WINDOW + 0x0c]
77 stw %l4, [%g3 + TI_REG_WINDOW + 0x10]
78 stw %l5, [%g3 + TI_REG_WINDOW + 0x14]
79 stw %l6, [%g3 + TI_REG_WINDOW + 0x18]
80 stw %l7, [%g3 + TI_REG_WINDOW + 0x1c]
81 stw %i0, [%g3 + TI_REG_WINDOW + 0x20]
82 stw %i1, [%g3 + TI_REG_WINDOW + 0x24]
83 stw %i2, [%g3 + TI_REG_WINDOW + 0x28]
84 stw %i3, [%g3 + TI_REG_WINDOW + 0x2c]
85 stw %i4, [%g3 + TI_REG_WINDOW + 0x30]
86 stw %i5, [%g3 + TI_REG_WINDOW + 0x34]
87 stw %i6, [%g3 + TI_REG_WINDOW + 0x38]
88 stw %i7, [%g3 + TI_REG_WINDOW + 0x3c]
90 stb %g1, [%g6 + TI_WSAVED]
92 andcc %g1, TSTATE_PRIV, %g0
95 and %g1, TSTATE_CWP, %g1
97 1: mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4
98 stb %g4, [%g6 + TI_FAULT_CODE]
99 stx %g5, [%g6 + TI_FAULT_ADDR]
103 call do_sparc64_fault
104 add %sp, PTREGS_OFF, %o0
115 and %g1, TSTATE_CWP, %g1
119 sethi %hi(tlb_type), %g1
120 lduw [%g1 + %lo(tlb_type)], %g1
123 add %sp, PTREGS_OFF, %o0
130 call mem_address_unaligned
142 and %g1, TSTATE_CWP, %g1
146 sethi %hi(tlb_type), %g1
148 lduw [%g1 + %lo(tlb_type)], %g1
152 add %sp, PTREGS_OFF, %o0
153 call sun4v_data_access_exception
157 1: call spitfire_data_access_exception