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
|
/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* i386-specific routines for loading a.out files.
*/
#include <mach.h>
#include <mach/machine/vm_param.h>
#include "mach-exec.h"
#include <file_io.h>
#ifdef i386
#include <mach/machine/eflags.h>
/*
* Machine-dependent portions of execve() for the i386.
*/
#define STACK_SIZE (64*1024)
char *set_regs(
mach_port_t user_task,
mach_port_t user_thread,
struct exec_info *info,
int arg_size)
{
vm_offset_t stack_start;
vm_offset_t stack_end;
struct i386_thread_state regs;
unsigned int reg_size;
/*
* Add space for 5 ints to arguments, for
* PS program. XXX
*/
arg_size += 5 * sizeof(int);
/*
* Allocate stack.
*/
stack_end = VM_MAX_ADDRESS;
stack_start = VM_MAX_ADDRESS - STACK_SIZE;
(void)vm_allocate(user_task,
&stack_start,
(vm_size_t)(stack_end - stack_start),
FALSE);
reg_size = i386_THREAD_STATE_COUNT;
(void)thread_get_state(user_thread,
i386_THREAD_STATE,
(thread_state_t)®s,
®_size);
regs.eip = info->entry;
regs.uesp = (int)((stack_end - arg_size) & ~(sizeof(int)-1));
/* regs.efl |= EFL_TF; trace flag*/
(void)thread_set_state(user_thread,
i386_THREAD_STATE,
(thread_state_t)®s,
reg_size);
return (char *)regs.uesp;
}
#elif defined __alpha__
/*
* Object:
* set_regs EXPORTED function
*
* Initialize enough state for a thread to run, including
* stack memory and stack pointer, and program counter.
*
*/
#define STACK_SIZE (vm_size_t)(128*1024)
char *set_regs(
mach_port_t user_task,
mach_port_t user_thread,
struct exec_info *info,
int arg_size)
{
vm_offset_t stack_start;
vm_offset_t stack_end;
struct alpha_thread_state regs;
natural_t reg_size;
/*
* Allocate stack.
*/
stack_end = VM_MAX_ADDRESS;
stack_start = stack_end - STACK_SIZE;
(void)vm_allocate(user_task,
&stack_start,
(vm_size_t)(STACK_SIZE),
FALSE);
reg_size = ALPHA_THREAD_STATE_COUNT;
(void)thread_get_state(user_thread,
ALPHA_THREAD_STATE,
(thread_state_t)®s,
®_size);
regs.pc = info->entry;
regs.r29 = info->init_dp;
regs.r30 = (integer_t)((stack_end - arg_size) & ~(sizeof(integer_t)-1));
(void)thread_set_state(user_thread,
ALPHA_THREAD_STATE,
(thread_state_t)®s,
reg_size);
return (char *)regs.r30;
}
#else
# error "Not ported to this architecture!"
#endif
|
