2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
6 #ifndef __KERN_UTIL_H__
7 #define __KERN_UTIL_H__
9 #include "sysdep/ptrace.h"
10 #include "sysdep/faultinfo.h"
12 typedef void (*kern_hndl
)(int, struct uml_pt_regs
*);
14 struct kern_handlers
{
15 kern_hndl relay_signal
;
17 kern_hndl bus_handler
;
19 kern_hndl sigio_handler
;
20 kern_hndl timer_handler
;
23 extern const struct kern_handlers handlinfo_kern
;
26 extern char *gdb_init
;
27 extern int kmalloc_ok
;
31 #define UML_ROUND_DOWN(addr) ((void *)(((unsigned long) addr) & PAGE_MASK))
32 #define UML_ROUND_UP(addr) \
33 UML_ROUND_DOWN(((unsigned long) addr) + PAGE_SIZE - 1)
35 extern int kernel_fork(unsigned long flags
, int (*fn
)(void *), void * arg
);
36 extern int kernel_thread_proc(void *data
);
37 extern void syscall_segv(int sig
);
38 extern int current_pid(void);
39 extern unsigned long alloc_stack(int order
, int atomic
);
40 extern int do_signal(void);
41 extern int is_stack_fault(unsigned long sp
);
42 extern unsigned long segv(struct faultinfo fi
, unsigned long ip
,
43 int is_user
, struct uml_pt_regs
*regs
);
44 extern int handle_page_fault(unsigned long address
, unsigned long ip
,
45 int is_write
, int is_user
, int *code_out
);
46 extern void syscall_ready(void);
47 extern void set_tracing(void *t
, int tracing
);
48 extern int is_tracing(void *task
);
49 extern int segv_syscall(void);
50 extern void kern_finish_exec(void *task
, int new_pid
, unsigned long stack
);
51 extern unsigned long page_mask(void);
52 extern int need_finish_fork(void);
53 extern void free_stack(unsigned long stack
, int order
);
54 extern void add_input_request(int op
, void (*proc
)(int), void *arg
);
55 extern char *current_cmd(void);
56 extern void timer_handler(int sig
, struct uml_pt_regs
*regs
);
57 extern int set_signals(int enable
);
58 extern int pid_to_processor_id(int pid
);
59 extern void deliver_signals(void *t
);
60 extern int next_trap_index(int max
);
61 extern void default_idle(void);
62 extern void finish_fork(void);
63 extern void paging_init(void);
64 extern void init_flush_vm(void);
65 extern void *syscall_sp(void *t
);
66 extern void syscall_trace(struct uml_pt_regs
*regs
, int entryexit
);
68 extern unsigned int do_IRQ(int irq
, struct uml_pt_regs
*regs
);
69 extern void interrupt_end(void);
70 extern void initial_thread_cb(void (*proc
)(void *), void *arg
);
71 extern int debugger_signal(int status
, int pid
);
72 extern void debugger_parent_signal(int status
, int pid
);
73 extern void child_signal(int pid
, int status
);
74 extern int init_ptrace_proxy(int idle_pid
, int startup
, int stop
);
75 extern int init_parent_proxy(int pid
);
76 extern int singlestepping(void *t
);
77 extern void check_stack_overflow(void *ptr
);
78 extern void relay_signal(int sig
, struct uml_pt_regs
*regs
);
79 extern int user_context(unsigned long sp
);
80 extern void timer_irq(struct uml_pt_regs
*regs
);
81 extern void do_uml_exitcalls(void);
82 extern int attach_debugger(int idle_pid
, int pid
, int stop
);
83 extern int config_gdb(char *str
);
84 extern int remove_gdb(void);
85 extern char *uml_strdup(char *string
);
86 extern void unprotect_kernel_mem(void);
87 extern void protect_kernel_mem(void);
88 extern void uml_cleanup(void);
89 extern void lock_signalled_task(void *t
);
90 extern void IPI_handler(int cpu
);
91 extern int jail_setup(char *line
, int *add
);
92 extern void *get_init_task(void);
93 extern int clear_user_proc(void *buf
, int size
);
94 extern int copy_to_user_proc(void *to
, void *from
, int size
);
95 extern int copy_from_user_proc(void *to
, void *from
, int size
);
96 extern int strlen_user_proc(char *str
);
97 extern long execute_syscall(void *r
);
98 extern int smp_sigio_handler(void);
99 extern void *get_current(void);
100 extern struct task_struct
*get_task(int pid
, int require
);
101 extern void machine_halt(void);
102 extern int is_syscall(unsigned long addr
);
104 extern void free_irq(unsigned int, void *);
105 extern int cpu(void);
107 extern void time_init_kern(void);
109 /* Are we disallowed to sleep? Used to choose between GFP_KERNEL and GFP_ATOMIC. */
110 extern int __cant_sleep(void);
111 extern void sigio_handler(int sig
, struct uml_pt_regs
*regs
);
112 extern void copy_sc(struct uml_pt_regs
*regs
, void *from
);
113 extern unsigned long to_irq_stack(unsigned long *mask_out
);
114 unsigned long from_irq_stack(int nested
);
115 extern int start_uml(void);