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
|
/*
* Linux/PARISC Project (http://www.parisc-linux.org/)
*
* HP-UX System Call Wrapper routines and System Call Return Path
*
* Copyright (C) 2000 Hewlett-Packard (John Marvin)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef __LP64__
#warning PA64 support needs more work...did first cut
#endif
#include <asm/offsets.h>
#include <asm/assembly.h>
#include <asm/signal.h>
#ifdef __LP64__
.level 2.0w
#else
.level 1.1
#endif
.text
/* These should probably go in a header file somewhere.
* They are duplicated in kernel/wrappers.S
* Possibly we should consider consolidating these
* register save/restore macros.
*/
.macro reg_save regs
#ifdef __LP64__
#warning NEEDS WORK for 64-bit
#endif
STREG %r3, PT_GR3(\regs)
STREG %r4, PT_GR4(\regs)
STREG %r5, PT_GR5(\regs)
STREG %r6, PT_GR6(\regs)
STREG %r7, PT_GR7(\regs)
STREG %r8, PT_GR8(\regs)
STREG %r9, PT_GR9(\regs)
STREG %r10,PT_GR10(\regs)
STREG %r11,PT_GR11(\regs)
STREG %r12,PT_GR12(\regs)
STREG %r13,PT_GR13(\regs)
STREG %r14,PT_GR14(\regs)
STREG %r15,PT_GR15(\regs)
STREG %r16,PT_GR16(\regs)
STREG %r17,PT_GR17(\regs)
STREG %r18,PT_GR18(\regs)
.endm
.macro reg_restore regs
LDREG PT_GR3(\regs), %r3
LDREG PT_GR4(\regs), %r4
LDREG PT_GR5(\regs), %r5
LDREG PT_GR6(\regs), %r6
LDREG PT_GR7(\regs), %r7
LDREG PT_GR8(\regs), %r8
LDREG PT_GR9(\regs), %r9
LDREG PT_GR10(\regs),%r10
LDREG PT_GR11(\regs),%r11
LDREG PT_GR12(\regs),%r12
LDREG PT_GR13(\regs),%r13
LDREG PT_GR14(\regs),%r14
LDREG PT_GR15(\regs),%r15
LDREG PT_GR16(\regs),%r16
LDREG PT_GR17(\regs),%r17
LDREG PT_GR18(\regs),%r18
.endm
.export hpux_fork_wrapper
.export hpux_child_return
.import sys_fork
hpux_fork_wrapper:
ldo TASK_REGS-TASK_SZ_ALGN-64(%r30),%r1 ;! get pt regs
;! pointer in task
reg_save %r1
STREG %r2,-20(%r30)
ldo 64(%r30),%r30
STREG %r2,PT_GR19(%r1) ;! save for child
STREG %r30,PT_GR21(%r1) ;! save for child
LDREG PT_GR30(%r1),%r25
mtctl %r25,%cr29
copy %r1,%r24
bl sys_clone,%r2
ldi SIGCHLD,%r26
LDREG -84(%r30),%r2
fork_return:
ldo -64(%r30),%r30
ldo TASK_REGS-TASK_SZ_ALGN-64(%r30),%r1 ;! get pt regs
reg_restore %r1
/*
* HP-UX wants pid (child gets parent pid, parent gets child pid)
* in r28 and a flag in r29 (r29 == 1 for child, 0 for parent).
* Linux fork returns 0 for child, pid for parent. Since HP-UX
* libc stub throws away parent pid and returns 0 for child,
* we'll just return 0 for parent pid now. Only applications
* that jump directly to the gateway page (not supported) will
* know the difference. We can fix this later if necessary.
*/
ldo -1024(%r0),%r1
comb,>>=,n %r28,%r1,fork_exit /* just let the syscall exit handle it */
or,= %r28,%r0,%r0
or,tr %r0,%r0,%r29 /* r28 <> 0, we are parent, set r29 to 0 */
ldo 1(%r0),%r29 /* r28 == 0, we are child, set r29 to 1 */
fork_exit:
bv %r0(%r2)
nop
/* Set the return value for the child */
hpux_child_return:
#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
bl schedule_tail, %r2
nop
#endif
LDREG TASK_PT_GR19-TASK_SZ_ALGN-128(%r30),%r2
b fork_return
copy %r0,%r28
.export hpux_execve_wrapper
.export hpux_execv_wrapper
.import hpux_execve
hpux_execv_wrapper:
copy %r0,%r24 /* NULL environment */
hpux_execve_wrapper:
ldo TASK_REGS-TASK_SZ_ALGN-64(%r30),%r1 ;! get pt regs
/*
* Do we need to save/restore r3-r18 here?
* I don't think so. why would new thread need old
* threads registers?
*/
/* Store arg0, arg1 and arg2 so that hpux_execve will find them */
STREG %r26,PT_GR26(%r1)
STREG %r25,PT_GR25(%r1)
STREG %r24,PT_GR24(%r1)
STREG %r2,-20(%r30)
ldo 64(%r30),%r30
bl hpux_execve,%r2
copy %r1,%arg0
ldo -64(%r30),%r30
LDREG -20(%r30),%r2
/* If exec succeeded we need to load the args */
ldo -1024(%r0),%r1
comb,>>= %r28,%r1,exec_error
copy %r2,%r19
ldo -TASK_SZ_ALGN-64(%r30),%r1 ;! get task ptr
LDREG TASK_PT_GR26(%r1),%r26
LDREG TASK_PT_GR25(%r1),%r25
LDREG TASK_PT_GR24(%r1),%r24
LDREG TASK_PT_GR23(%r1),%r23
copy %r0,%r2 /* Flag to syscall_exit not to clear args */
exec_error:
bv %r0(%r19)
nop
.export hpux_pipe_wrapper
.import hpux_pipe
/* HP-UX expects pipefd's returned in r28 & r29 */
hpux_pipe_wrapper:
STREG %r2,-20(%r30)
ldo 64(%r30),%r30
bl hpux_pipe,%r2
ldo -56(%r30),%r26 /* pass local array to hpux_pipe */
ldo -1024(%r0),%r1
comb,>>= %r28,%r1,pipe_exit /* let syscall exit handle it */
LDREG -84(%r30),%r2
/* if success, load fd's from stack array */
LDREG -56(%r30),%r28
LDREG -52(%r30),%r29
pipe_exit:
bv %r0(%r2)
ldo -64(%r30),%r30
.export hpux_syscall_exit
.import syscall_exit
hpux_syscall_exit:
/*
*
* HP-UX call return conventions:
*
* if error:
* r22 = 1
* r28 = errno value
* r29 = secondary return value
* else
* r22 = 0
* r28 = return value
* r29 = secondary return value
*
* For now, we'll just check to see if r28 is < (unsigned long)-1024
* (to handle addresses > 2 Gb) and if so set r22 to zero. If not,
* we'll complement r28 and set r22 to 1. Wrappers will be
* needed for syscalls that care about the secondary return value.
* The wrapper may also need a way of avoiding the following code,
* but we'll deal with that when it becomes necessary.
*/
ldo -1024(%r0),%r1
comb,<< %r28,%r1,no_error
copy %r0,%r22
subi 0,%r28,%r28
ldo 1(%r0),%r22
no_error:
b syscall_exit
nop
.export hpux_unimplemented_wrapper
.import hpux_unimplemented
hpux_unimplemented_wrapper:
b hpux_unimplemented
STREG %r22,-64(%r30) /* overwrite arg8 with syscall number */
|
