arch/um/include/kern_util.h

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.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 #include "uml-config.h"
  12
  13 typedef void (*kern_hndl)(int, union uml_pt_regs *);
  14
  15 struct kern_handlers {
  16         kern_hndl relay_signal;
  17         kern_hndl winch;
  18         kern_hndl bus_handler;
  19         kern_hndl page_fault;
  20         kern_hndl sigio_handler;
  21         kern_hndl timer_handler;
  22 };
  23
  24 extern const struct kern_handlers handlinfo_kern;
  25
  26 extern int ncpus;
  27 extern char *gdb_init;
  28 extern int kmalloc_ok;
  29 extern int jail;
  30 extern int nsyscalls;
  31
  32 #define UML_ROUND_DOWN(addr) ((void *)(((unsigned long) addr) & PAGE_MASK))
  33 #define UML_ROUND_UP(addr) \
  34         UML_ROUND_DOWN(((unsigned long) addr) + PAGE_SIZE - 1)
  35
  36 extern int kernel_fork(unsigned long flags, int (*fn)(void *), void * arg);
  37 #ifdef UML_CONFIG_MODE_TT
  38 extern unsigned long stack_sp(unsigned long page);
  39 #endif
  40 extern int kernel_thread_proc(void *data);
  41 extern void syscall_segv(int sig);
  42 extern int current_pid(void);
  43 extern unsigned long alloc_stack(int order, int atomic);
  44 extern int do_signal(void);
  45 extern int is_stack_fault(unsigned long sp);
  46 extern unsigned long segv(struct faultinfo fi, unsigned long ip,
  47                           int is_user, void *sc);
  48 extern int handle_page_fault(unsigned long address, unsigned long ip,
  49                              int is_write, int is_user, int *code_out);
  50 extern void syscall_ready(void);
  51 extern void set_tracing(void *t, int tracing);
  52 extern int is_tracing(void *task);
  53 extern int segv_syscall(void);
  54 extern void kern_finish_exec(void *task, int new_pid, unsigned long stack);
  55 extern unsigned long page_mask(void);
  56 extern int need_finish_fork(void);
  57 extern void free_stack(unsigned long stack, int order);
  58 extern void add_input_request(int op, void (*proc)(int), void *arg);
  59 extern char *current_cmd(void);
  60 extern void timer_handler(int sig, union uml_pt_regs *regs);
  61 extern int set_signals(int enable);
  62 extern int pid_to_processor_id(int pid);
  63 extern void deliver_signals(void *t);
  64 extern int next_trap_index(int max);
  65 extern void default_idle(void);
  66 extern void finish_fork(void);
  67 extern void paging_init(void);
  68 extern void init_flush_vm(void);
  69 extern void *syscall_sp(void *t);
  70 extern void syscall_trace(union uml_pt_regs *regs, int entryexit);
  71 extern int hz(void);
  72 extern unsigned int do_IRQ(int irq, union uml_pt_regs *regs);
  73 extern void interrupt_end(void);
  74 extern void initial_thread_cb(void (*proc)(void *), void *arg);
  75 extern int debugger_signal(int status, int pid);
  76 extern void debugger_parent_signal(int status, int pid);
  77 extern void child_signal(int pid, int status);
  78 extern int init_ptrace_proxy(int idle_pid, int startup, int stop);
  79 extern int init_parent_proxy(int pid);
  80 extern int singlestepping(void *t);
  81 extern void check_stack_overflow(void *ptr);
  82 extern void relay_signal(int sig, union uml_pt_regs *regs);
  83 extern int user_context(unsigned long sp);
  84 extern void timer_irq(union uml_pt_regs *regs);
  85 extern void unprotect_stack(unsigned long stack);
  86 extern void do_uml_exitcalls(void);
  87 extern int attach_debugger(int idle_pid, int pid, int stop);
  88 extern int config_gdb(char *str);
  89 extern int remove_gdb(void);
  90 extern char *uml_strdup(char *string);
  91 extern void unprotect_kernel_mem(void);
  92 extern void protect_kernel_mem(void);
  93 extern void uml_cleanup(void);
  94 extern void lock_signalled_task(void *t);
  95 extern void IPI_handler(int cpu);
  96 extern int jail_setup(char *line, int *add);
  97 extern void *get_init_task(void);
  98 extern int clear_user_proc(void *buf, int size);
  99 extern int copy_to_user_proc(void *to, void *from, int size);
 100 extern int copy_from_user_proc(void *to, void *from, int size);
 101 extern int strlen_user_proc(char *str);
 102 extern long execute_syscall(void *r);
 103 extern int smp_sigio_handler(void);
 104 extern void *get_current(void);
 105 extern struct task_struct *get_task(int pid, int require);
 106 extern void machine_halt(void);
 107 extern int is_syscall(unsigned long addr);
 108
 109 extern void free_irq(unsigned int, void *);
 110 extern int cpu(void);
 111
 112 extern void time_init_kern(void);
 113
 114 /* Are we disallowed to sleep? Used to choose between GFP_KERNEL and GFP_ATOMIC. */
 115 extern int __cant_sleep(void);
 116 extern void sigio_handler(int sig, union uml_pt_regs *regs);
 117
 118 #endif