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12 #include <asm/ptrace.h>
13 #include <asm/export.h>
14
15
16 #define ALLOC #alloc
17 #define EXECINSTR #execinstr
18 #define EX(x,y,a,b) \
19 98: x,y; \
20 .section .fixup,ALLOC,EXECINSTR; \
21 .align 4; \
22 99: ba 30f; \
23 a, b, %o0; \
24 .section __ex_table,ALLOC; \
25 .align 4; \
26 .word 98b, 99b; \
27 .text; \
28 .align 4
29
30 #define EXT(start,end,handler) \
31 .section __ex_table,ALLOC; \
32 .align 4; \
33 .word start, 0, end, handler; \
34 .text; \
35 .align 4
36
37
38
39
40 #define ZERO_BIG_BLOCK(base, offset, source) \
41 std source, [base + offset + 0x00]; \
42 std source, [base + offset + 0x08]; \
43 std source, [base + offset + 0x10]; \
44 std source, [base + offset + 0x18]; \
45 std source, [base + offset + 0x20]; \
46 std source, [base + offset + 0x28]; \
47 std source, [base + offset + 0x30]; \
48 std source, [base + offset + 0x38];
49
50 #define ZERO_LAST_BLOCKS(base, offset, source) \
51 std source, [base - offset - 0x38]; \
52 std source, [base - offset - 0x30]; \
53 std source, [base - offset - 0x28]; \
54 std source, [base - offset - 0x20]; \
55 std source, [base - offset - 0x18]; \
56 std source, [base - offset - 0x10]; \
57 std source, [base - offset - 0x08]; \
58 std source, [base - offset - 0x00];
59
60 .text
61 .align 4
62
63 .globl __bzero_begin
64 __bzero_begin:
65
66 .globl __bzero
67 .type __bzero,#function
68 .globl memset
69 EXPORT_SYMBOL(__bzero)
70 EXPORT_SYMBOL(memset)
71 .globl __memset_start, __memset_end
72 __memset_start:
73 memset:
74 mov %o0, %g1
75 mov 1, %g4
76 and %o1, 0xff, %g3
77 sll %g3, 8, %g2
78 or %g3, %g2, %g3
79 sll %g3, 16, %g2
80 or %g3, %g2, %g3
81 b 1f
82 mov %o2, %o1
83 3:
84 cmp %o2, 3
85 be 2f
86 EX(stb %g3, [%o0], sub %o1, 0)
87
88 cmp %o2, 2
89 be 2f
90 EX(stb %g3, [%o0 + 0x01], sub %o1, 1)
91
92 EX(stb %g3, [%o0 + 0x02], sub %o1, 2)
93 2:
94 sub %o2, 4, %o2
95 add %o1, %o2, %o1
96 b 4f
97 sub %o0, %o2, %o0
98
99 __bzero:
100 clr %g4
101 mov %g0, %g3
102 1:
103 cmp %o1, 7
104 bleu 7f
105 andcc %o0, 3, %o2
106
107 bne 3b
108 4:
109 andcc %o0, 4, %g0
110
111 be 2f
112 mov %g3, %g2
113
114 EX(st %g3, [%o0], sub %o1, 0)
115 sub %o1, 4, %o1
116 add %o0, 4, %o0
117 2:
118 andcc %o1, 0xffffff80, %o3 ! Now everything is 8 aligned and o1 is len to run
119 be 9f
120 andcc %o1, 0x78, %o2
121 10:
122 ZERO_BIG_BLOCK(%o0, 0x00, %g2)
123 subcc %o3, 128, %o3
124 ZERO_BIG_BLOCK(%o0, 0x40, %g2)
125 11:
126 EXT(10b, 11b, 20f)
127 bne 10b
128 add %o0, 128, %o0
129
130 orcc %o2, %g0, %g0
131 9:
132 be 13f
133 andcc %o1, 7, %o1
134
135 srl %o2, 1, %o3
136 set 13f, %o4
137 sub %o4, %o3, %o4
138 jmp %o4
139 add %o0, %o2, %o0
140
141 12:
142 ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
143 ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
144 13:
145 be 8f
146 andcc %o1, 4, %g0
147
148 be 1f
149 andcc %o1, 2, %g0
150
151 EX(st %g3, [%o0], and %o1, 7)
152 add %o0, 4, %o0
153 1:
154 be 1f
155 andcc %o1, 1, %g0
156
157 EX(sth %g3, [%o0], and %o1, 3)
158 add %o0, 2, %o0
159 1:
160 bne,a 8f
161 EX(stb %g3, [%o0], and %o1, 1)
162 8:
163 b 0f
164 nop
165 7:
166 be 13b
167 orcc %o1, 0, %g0
168
169 be 0f
170 8:
171 add %o0, 1, %o0
172 subcc %o1, 1, %o1
173 bne 8b
174 EX(stb %g3, [%o0 - 1], add %o1, 1)
175 0:
176 andcc %g4, 1, %g0
177 be 5f
178 nop
179 retl
180 mov %g1, %o0
181 5:
182 retl
183 clr %o0
184 __memset_end:
185
186 .section .fixup,#alloc,#execinstr
187 .align 4
188 20:
189 cmp %g2, 8
190 bleu 1f
191 and %o1, 0x7f, %o1
192 sub %g2, 9, %g2
193 add %o3, 64, %o3
194 1:
195 sll %g2, 3, %g2
196 add %o3, %o1, %o0
197 b 30f
198 sub %o0, %g2, %o0
199 21:
200 mov 8, %o0
201 and %o1, 7, %o1
202 sub %o0, %g2, %o0
203 sll %o0, 3, %o0
204 b 30f
205 add %o0, %o1, %o0
206 30:
207
208 save %sp, -104, %sp
209 mov %i5, %o0
210 mov %i7, %o1
211 call lookup_fault
212 mov %i4, %o2
213 ret
214 restore
215
216 .globl __bzero_end
217 __bzero_end: