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
|
/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#ifndef __UM_PROCESSOR_GENERIC_H
#define __UM_PROCESSOR_GENERIC_H
struct pt_regs;
struct task_struct;
#include "linux/config.h"
#include "asm/ptrace.h"
#include "choose-mode.h"
#include "registers.h"
struct mm_struct;
struct thread_struct {
/* This flag is set to 1 before calling do_fork (and analyzed in
* copy_thread) to mark that we are begin called from userspace (fork /
* vfork / clone), and reset to 0 after. It is left to 0 when called
* from kernelspace (i.e. kernel_thread() or fork_idle(), as of 2.6.11). */
struct task_struct *saved_task;
int forking;
int nsyscalls;
struct pt_regs regs;
int singlestep_syscall;
void *fault_addr;
void *fault_catcher;
struct task_struct *prev_sched;
unsigned long temp_stack;
void *exec_buf;
struct arch_thread arch;
union {
#ifdef CONFIG_MODE_TT
struct {
int extern_pid;
int tracing;
int switch_pipe[2];
int vm_seq;
} tt;
#endif
#ifdef CONFIG_MODE_SKAS
struct {
void *switch_buf;
void *fork_buf;
int mm_count;
} skas;
#endif
} mode;
struct {
int op;
union {
struct {
int pid;
} fork, exec;
struct {
int (*proc)(void *);
void *arg;
} thread;
struct {
void (*proc)(void *);
void *arg;
} cb;
} u;
} request;
};
#define INIT_THREAD \
{ \
.forking = 0, \
.nsyscalls = 0, \
.regs = EMPTY_REGS, \
.fault_addr = NULL, \
.prev_sched = NULL, \
.temp_stack = 0, \
.exec_buf = NULL, \
.arch = INIT_ARCH_THREAD, \
.request = { 0 } \
}
typedef struct {
unsigned long seg;
} mm_segment_t;
extern struct task_struct *alloc_task_struct(void);
extern void release_thread(struct task_struct *);
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern void dump_thread(struct pt_regs *regs, struct user *u);
static inline void prepare_to_copy(struct task_struct *tsk)
{
}
extern unsigned long thread_saved_pc(struct task_struct *t);
static inline void mm_copy_segments(struct mm_struct *from_mm,
struct mm_struct *new_mm)
{
}
#define init_stack (init_thread_union.stack)
/*
* User space process size: 3GB (default).
*/
extern unsigned long task_size;
#define TASK_SIZE (task_size)
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
*/
#define TASK_UNMAPPED_BASE (0x40000000)
extern void start_thread(struct pt_regs *regs, unsigned long entry,
unsigned long stack);
struct cpuinfo_um {
unsigned long loops_per_jiffy;
int ipi_pipe[2];
};
extern struct cpuinfo_um boot_cpu_data;
#define my_cpu_data cpu_data[smp_processor_id()]
#ifdef CONFIG_SMP
extern struct cpuinfo_um cpu_data[];
#define current_cpu_data cpu_data[smp_processor_id()]
#else
#define cpu_data (&boot_cpu_data)
#define current_cpu_data boot_cpu_data
#endif
#ifdef CONFIG_MODE_SKAS
#define KSTK_REG(tsk, reg) \
({ union uml_pt_regs regs; \
get_thread_regs(®s, tsk->thread.mode.skas.switch_buf); \
UPT_REG(®s, reg); })
#else
#define KSTK_REG(tsk, reg) (0xbadbabe)
#endif
#define get_wchan(p) (0)
#endif
|
