1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
/* $OpenBSD: ldasm.S,v 1.9 2002/08/11 18:41:17 drahn Exp $ */
/*
* Copyright (c) 2001 Niklas Hallqvist
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed under OpenBSD by
* Niklas Hallqvist.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* Copyright 1996 Matt Thomas <matt@3am-software.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#include <machine/pal.h>
#include <sys/syscall.h>
#define AUX_entry 9
.extern _GLOBAL_OFFSET_TABLE_
/* Not really a leaf... but we are special. */
LEAF_NOPROFILE(_dl_start, 0)
.set noreorder
lda sp, (-8 - ((AUX_entry) * 8))(sp)
br pv, L1
L1:
LDGP(pv)
ldiq t2, L1
subq pv, t2, t2
lda t0, _GLOBAL_OFFSET_TABLE_
addq t0, t2, t0
lda t1, _DYNAMIC
addq t1, t2, t1
L2: cmpult t0, t1, t3
beq t3, L3
ldq t3, 0(t0)
addq t3, t2, t3
stq t3, 0(t0)
lda t0, 8(t0)
br L2
L3:
mov a0, s0
mov t2, a1 /* relocation displacement */
mov a1, s1
ldq a2, 0(a0) /* argc */
lda a3, 8(a0) /* argv */
mov a3, s3
lda t3, 1(a2)
sll t3, 3, t3
addq a3, t3, a4 /* envp */
mov a4, s4
mov t1, a2 /* dynamic */
mov a5, s5
lda s2, 0(sp)
mov s2, a3
CALL(_dl_boot_bind)
mov s3, a0 /* **argv */
mov s4, a1 /* **envp */
mov s1, a2 /* loff */
mov s2, a3 /* dl_data */
CALL(_dl_boot)
mov s0, a0
mov v0, pv
jsr ra, (pv)
END(_dl_start)
/*
* Lazy binding entry point, called via PLT.
*/
NESTED_NOPROFILE(_dl_bind_start, 0, 168, ra, 0, 0)
.set noat
/* at_reg already used by PLT code. */
/*
* Allocate stack frame and preserve all registers that the caller
* would have normally saved themselves.
*/
lda sp, -168(sp)
stq ra, 0(sp)
stq v0, 8(sp)
stq t0, 16(sp)
stq t1, 24(sp)
stq t2, 32(sp)
stq t3, 40(sp)
stq t4, 48(sp)
stq t5, 56(sp)
stq t6, 64(sp)
stq t7, 72(sp)
stq a0, 80(sp)
stq a1, 88(sp)
stq a2, 96(sp)
stq a3, 104(sp)
stq a4, 112(sp)
stq a5, 120(sp)
stq t8, 128(sp)
stq t9, 136(sp)
stq t10, 144(sp)
stq t11, 152(sp)
stq gp, 160(sp)
/*
* Load our global pointer. Note, can't use pv, since it is
* already used by the PLT code.
*/
br t0, L100
L100: LDGP(t0)
/* Set up the arguments for _dl_bind. */
subq at_reg, t12, a1
ldq a0, 8(t12)
subq a1, 20, a1
addq a1, a1, a1
CALL(_dl_bind)
/* Move the destination address into position. */
mov v0, pv
/* Restore program registers. */
ldq ra, 0(sp)
ldq v0, 8(sp)
ldq t0, 16(sp)
ldq t1, 24(sp)
ldq t2, 32(sp)
ldq t3, 40(sp)
ldq t4, 48(sp)
ldq t5, 56(sp)
ldq t6, 64(sp)
ldq t7, 72(sp)
ldq a0, 80(sp)
ldq a1, 88(sp)
ldq a2, 96(sp)
ldq a3, 104(sp)
ldq a4, 112(sp)
ldq a5, 120(sp)
ldq t8, 128(sp)
ldq t9, 136(sp)
ldq t10, 144(sp)
ldq t11, 152(sp)
ldq gp, 160(sp)
/* XXX LDGP? */
/*
* We've patched the PLT; sync the I-stream.
*/
imb
/* Pop the stack frame and turn control to the destination. */
lda sp, 168(sp)
jmp zero, (pv)
END(_dl_bind_start)
/*
* In reality these are not leaves, but they are stubs which does not need
* further register saving.
*/
LEAF_NOPROFILE(_dl_exit, 1)
ldiq v0, SYS_exit
call_pal PAL_OSF1_callsys
RET
END(_dl_exit)
LEAF_NOPROFILE(_dl_open, 2)
ldiq v0, SYS_open
call_pal PAL_OSF1_callsys
beq a3, _dl_open_no_error
subq zero, v0, v0
_dl_open_no_error:
RET
END(_dl_open)
LEAF_NOPROFILE(_dl_close, 1)
ldiq v0, SYS_close
call_pal PAL_OSF1_callsys
RET
END(_dl_close)
LEAF_NOPROFILE(_dl_write, 3)
ldiq v0, SYS_write
call_pal PAL_OSF1_callsys
RET
END(_dl_write)
LEAF_NOPROFILE(_dl_read, 3)
ldiq v0, SYS_read
call_pal PAL_OSF1_callsys
RET
END(_dl_read)
LEAF_NOPROFILE(_dl_mmap, 6)
lda sp, -8(sp)
stq a5, 0(sp)
ldiq v0, SYS_mmap
call_pal PAL_OSF1_callsys
lda sp, 8(sp)
RET
END(_dl_mmap)
LEAF_NOPROFILE(_dl_munmap, 2)
ldiq v0, SYS_munmap
call_pal PAL_OSF1_callsys
RET
END(_dl_munmap)
LEAF_NOPROFILE(_dl_mprotect, 3)
ldiq v0, SYS_mprotect
call_pal PAL_OSF1_callsys
RET
END(_dl_mprotect)
LEAF_NOPROFILE(_dl_issetugid, 0)
ldiq v0, SYS_issetugid
call_pal PAL_OSF1_callsys
RET
END(_dl_issetugid)
LEAF_NOPROFILE(_dl_stat, 2)
ldiq v0, SYS_stat
call_pal PAL_OSF1_callsys
RET
END(_dl_stat)
LEAF_NOPROFILE(_dl__syscall, 3)
ldiq v0, SYS___syscall
call_pal PAL_OSF1_callsys
RET
END(_dl__syscall)
LEAF_NOPROFILE(_dl_fstat, 2)
ldiq v0, SYS_fstat
call_pal PAL_OSF1_callsys
RET
END(_dl_fstat)
LEAF_NOPROFILE(_dl_fcntl, 3)
ldiq v0, SYS_fcntl
call_pal PAL_OSF1_callsys
RET
END(_dl_fcntl)
LEAF_NOPROFILE(_dl_getdirentries, 4)
ldiq v0, SYS_getdirentries
call_pal PAL_OSF1_callsys
RET
END(_dl_getdirentries)
|
