1 /* winfixup.S: Handle cases where user stack pointer is found to be bogus.
3 * Copyright (C) 1997, 2006 David S. Miller (davem@davemloft.net)
9 #include <asm/ptrace.h>
10 #include <asm/processor.h>
11 #include <asm/spitfire.h>
12 #include <asm/thread_info.h>
16 /* It used to be the case that these register window fault
17 * handlers could run via the save and restore instructions
18 * done by the trap entry and exit code. They now do the
19 * window spill/fill by hand, so that case no longer can occur.
24 TRAP_LOAD_THREAD_REG(%g6, %g1)
26 and %g1, TSTATE_CWP, %g1
27 or %g4, FAULT_CODE_WINFIXUP, %g4
28 stb %g4, [%g6 + TI_FAULT_CODE]
29 stx %g5, [%g6 + TI_FAULT_ADDR]
34 add %sp, PTREGS_OFF, %o0
35 ba,pt %xcc, rtrap_clr_l6
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
46 andcc %g1, _TIF_32BIT, %g0
47 ldub [%g6 + TI_WSAVED], %g1
50 stx %sp, [%g3 + TI_RWIN_SPTRS]
54 stx %l0, [%g3 + TI_REG_WINDOW + 0x00]
55 stx %l1, [%g3 + TI_REG_WINDOW + 0x08]
56 stx %l2, [%g3 + TI_REG_WINDOW + 0x10]
57 stx %l3, [%g3 + TI_REG_WINDOW + 0x18]
58 stx %l4, [%g3 + TI_REG_WINDOW + 0x20]
59 stx %l5, [%g3 + TI_REG_WINDOW + 0x28]
60 stx %l6, [%g3 + TI_REG_WINDOW + 0x30]
61 stx %l7, [%g3 + TI_REG_WINDOW + 0x38]
62 stx %i0, [%g3 + TI_REG_WINDOW + 0x40]
63 stx %i1, [%g3 + TI_REG_WINDOW + 0x48]
64 stx %i2, [%g3 + TI_REG_WINDOW + 0x50]
65 stx %i3, [%g3 + TI_REG_WINDOW + 0x58]
66 stx %i4, [%g3 + TI_REG_WINDOW + 0x60]
67 stx %i5, [%g3 + TI_REG_WINDOW + 0x68]
68 stx %i6, [%g3 + TI_REG_WINDOW + 0x70]
70 stx %i7, [%g3 + TI_REG_WINDOW + 0x78]
71 1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00]
72 stw %l1, [%g3 + TI_REG_WINDOW + 0x04]
73 stw %l2, [%g3 + TI_REG_WINDOW + 0x08]
74 stw %l3, [%g3 + TI_REG_WINDOW + 0x0c]
75 stw %l4, [%g3 + TI_REG_WINDOW + 0x10]
76 stw %l5, [%g3 + TI_REG_WINDOW + 0x14]
77 stw %l6, [%g3 + TI_REG_WINDOW + 0x18]
78 stw %l7, [%g3 + TI_REG_WINDOW + 0x1c]
79 stw %i0, [%g3 + TI_REG_WINDOW + 0x20]
80 stw %i1, [%g3 + TI_REG_WINDOW + 0x24]
81 stw %i2, [%g3 + TI_REG_WINDOW + 0x28]
82 stw %i3, [%g3 + TI_REG_WINDOW + 0x2c]
83 stw %i4, [%g3 + TI_REG_WINDOW + 0x30]
84 stw %i5, [%g3 + TI_REG_WINDOW + 0x34]
85 stw %i6, [%g3 + TI_REG_WINDOW + 0x38]
86 stw %i7, [%g3 + TI_REG_WINDOW + 0x3c]
88 stb %g1, [%g6 + TI_WSAVED]
90 andcc %g1, TSTATE_PRIV, %g0
93 and %g1, TSTATE_CWP, %g1
95 1: mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4
96 stb %g4, [%g6 + TI_FAULT_CODE]
97 stx %g5, [%g6 + TI_FAULT_ADDR]
101 call do_sparc64_fault
102 add %sp, PTREGS_OFF, %o0
103 ba,a,pt %xcc, rtrap_clr_l6
113 and %g1, TSTATE_CWP, %g1
117 sethi %hi(tlb_type), %g1
118 lduw [%g1 + %lo(tlb_type)], %g1
121 add %sp, PTREGS_OFF, %o0
125 ba,a,pt %xcc, rtrap_clr_l6
128 call mem_address_unaligned
130 ba,a,pt %xcc, rtrap_clr_l6
140 and %g1, TSTATE_CWP, %g1
144 sethi %hi(tlb_type), %g1
146 lduw [%g1 + %lo(tlb_type)], %g1
150 add %sp, PTREGS_OFF, %o0
151 call sun4v_data_access_exception
153 ba,a,pt %xcc, rtrap_clr_l6
154 1: call spitfire_data_access_exception
156 ba,a,pt %xcc, rtrap_clr_l6