arch/um/include/kern_util.h

   1 /*
   2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __KERN_UTIL_H__
   7 #define __KERN_UTIL_H__
   8
   9 #include "sysdep/ptrace.h"
  10 #include "sysdep/faultinfo.h"
  11
  12 typedef void (*kern_hndl)(int, struct uml_pt_regs *);
  13
  14 struct kern_handlers {
  15         kern_hndl relay_signal;
  16         kern_hndl winch;
  17         kern_hndl bus_handler;
  18         kern_hndl page_fault;
  19         kern_hndl sigio_handler;
  20         kern_hndl timer_handler;
  21 };
  22
  23 extern const struct kern_handlers handlinfo_kern;
  24
  25 extern int ncpus;
  26 extern char *gdb_init;
  27 extern int kmalloc_ok;
  28 extern int jail;
  29 extern int nsyscalls;
  30
  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)
  34
  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);
  67 extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
  68 extern void interrupt_end(void);
  69 extern void initial_thread_cb(void (*proc)(void *), void *arg);
  70 extern int debugger_signal(int status, int pid);
  71 extern void debugger_parent_signal(int status, int pid);
  72 extern void child_signal(int pid, int status);
  73 extern int init_ptrace_proxy(int idle_pid, int startup, int stop);
  74 extern int init_parent_proxy(int pid);
  75 extern int singlestepping(void *t);
  76 extern void check_stack_overflow(void *ptr);
  77 extern void relay_signal(int sig, struct uml_pt_regs *regs);
  78 extern int user_context(unsigned long sp);
  79 extern void timer_irq(struct uml_pt_regs *regs);
  80 extern void do_uml_exitcalls(void);
  81 extern int attach_debugger(int idle_pid, int pid, int stop);
  82 extern int config_gdb(char *str);
  83 extern int remove_gdb(void);
  84 extern char *uml_strdup(char *string);
  85 extern void unprotect_kernel_mem(void);
  86 extern void protect_kernel_mem(void);
  87 extern void uml_cleanup(void);
  88 extern void lock_signalled_task(void *t);
  89 extern void IPI_handler(int cpu);
  90 extern int jail_setup(char *line, int *add);
  91 extern void *get_init_task(void);
  92 extern int clear_user_proc(void *buf, int size);
  93 extern int copy_to_user_proc(void *to, void *from, int size);
  94 extern int copy_from_user_proc(void *to, void *from, int size);
  95 extern int strlen_user_proc(char *str);
  96 extern long execute_syscall(void *r);
  97 extern int smp_sigio_handler(void);
  98 extern void *get_current(void);
  99 extern struct task_struct *get_task(int pid, int require);
 100 extern void machine_halt(void);
 101 extern int is_syscall(unsigned long addr);
 102
 103 extern void free_irq(unsigned int, void *);
 104 extern int cpu(void);
 105
 106 extern void time_init_kern(void);
 107
 108 /* Are we disallowed to sleep? Used to choose between GFP_KERNEL and GFP_ATOMIC. */
 109 extern int __cant_sleep(void);
 110 extern void sigio_handler(int sig, struct uml_pt_regs *regs);
 111 extern void copy_sc(struct uml_pt_regs *regs, void *from);
 112 extern unsigned long to_irq_stack(unsigned long *mask_out);
 113 unsigned long from_irq_stack(int nested);
 114 extern int start_uml(void);
 115 #endif