aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/um/kernel/skas/process_kern.c484
1 files changed, 0 insertions, 484 deletions
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
deleted file mode 100644
index 0f3d5d084dc7..000000000000
--- a/arch/um/kernel/skas/process_kern.c
+++ /dev/null
@@ -1,484 +0,0 @@
1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL
5 */
6
7#include "linux/config.h"
8#include "linux/kernel.h"
9#include "linux/sched.h"
10#include "linux/interrupt.h"
11#include "linux/string.h"
12#include "linux/mm.h"
13#include "linux/slab.h"
14#include "linux/utsname.h"
15#include "linux/fs.h"
16#include "linux/utime.h"
17#include "linux/smp_lock.h"
18#include "linux/module.h"
19#include "linux/init.h"
20#include "linux/capability.h"
21#include "linux/vmalloc.h"
22#include "linux/spinlock.h"
23#include "linux/proc_fs.h"
24#include "linux/ptrace.h"
25#include "linux/random.h"
26#include "linux/personality.h"
27#include "asm/unistd.h"
28#include "asm/mman.h"
29#include "asm/segment.h"
30#include "asm/stat.h"
31#include "asm/pgtable.h"
32#include "asm/processor.h"
33#include "asm/tlbflush.h"
34#include "asm/uaccess.h"
35#include "asm/user.h"
36#include "user_util.h"
37#include "kern_util.h"
38#include "kern.h"
39#include "signal_kern.h"
40#include "init.h"
41#include "irq_user.h"
42#include "mem_user.h"
43#include "tlb.h"
44#include "frame_kern.h"
45#include "sigcontext.h"
46#include "os.h"
47#include "mode.h"
48#include "mode_kern.h"
49#include "choose-mode.h"
50
51/* This is a per-cpu array. A processor only modifies its entry and it only
52 * cares about its entry, so it's OK if another processor is modifying its
53 * entry.
54 */
55struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
56
57int external_pid(void *t)
58{
59 struct task_struct *task = t ? t : current;
60
61 return(CHOOSE_MODE_PROC(external_pid_tt, external_pid_skas, task));
62}
63
64int pid_to_processor_id(int pid)
65{
66 int i;
67
68 for(i = 0; i < ncpus; i++){
69 if(cpu_tasks[i].pid == pid) return(i);
70 }
71 return(-1);
72}
73
74void free_stack(unsigned long stack, int order)
75{
76 free_pages(stack, order);
77}
78
79unsigned long alloc_stack(int order, int atomic)
80{
81 unsigned long page;
82 gfp_t flags = GFP_KERNEL;
83
84 if (atomic)
85 flags = GFP_ATOMIC;
86 page = __get_free_pages(flags, order);
87 if(page == 0)
88 return(0);
89 stack_protections(page);
90 return(page);
91}
92
93int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
94{
95 int pid;
96
97 current->thread.request.u.thread.proc = fn;
98 current->thread.request.u.thread.arg = arg;
99 pid = do_fork(CLONE_VM | CLONE_UNTRACED | flags, 0,
100 &current->thread.regs, 0, NULL, NULL);
101 if(pid < 0)
102 panic("do_fork failed in kernel_thread, errno = %d", pid);
103 return(pid);
104}
105
106void set_current(void *t)
107{
108 struct task_struct *task = t;
109
110 cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)
111 { external_pid(task), task });
112}
113
114void *_switch_to(void *prev, void *next, void *last)
115{
116 struct task_struct *from = prev;
117 struct task_struct *to= next;
118
119 to->thread.prev_sched = from;
120 set_current(to);
121
122 do {
123 current->thread.saved_task = NULL ;
124 CHOOSE_MODE_PROC(switch_to_tt, switch_to_skas, prev, next);
125 if(current->thread.saved_task)
126 show_regs(&(current->thread.regs));
127 next= current->thread.saved_task;
128 prev= current;
129 } while(current->thread.saved_task);
130
131 return(current->thread.prev_sched);
132
133}
134
135void interrupt_end(void)
136{
137 if(need_resched()) schedule();
138 if(test_tsk_thread_flag(current, TIF_SIGPENDING)) do_signal();
139}
140
141void release_thread(struct task_struct *task)
142{
143 CHOOSE_MODE(release_thread_tt(task), release_thread_skas(task));
144}
145
146void exit_thread(void)
147{
148 unprotect_stack((unsigned long) current_thread);
149}
150
151void *get_current(void)
152{
153 return(current);
154}
155
156int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
157 unsigned long stack_top, struct task_struct * p,
158 struct pt_regs *regs)
159{
160 int ret;
161
162 p->thread = (struct thread_struct) INIT_THREAD;
163 ret = CHOOSE_MODE_PROC(copy_thread_tt, copy_thread_skas, nr,
164 clone_flags, sp, stack_top, p, regs);
165
166 if (ret || !current->thread.forking)
167 goto out;
168
169 clear_flushed_tls(p);
170
171 /*
172 * Set a new TLS for the child thread?
173 */
174 if (clone_flags & CLONE_SETTLS)
175 ret = arch_copy_tls(p);
176
177out:
178 return ret;
179}
180
181void initial_thread_cb(void (*proc)(void *), void *arg)
182{
183 int save_kmalloc_ok = kmalloc_ok;
184
185 kmalloc_ok = 0;
186 CHOOSE_MODE_PROC(initial_thread_cb_tt, initial_thread_cb_skas, proc,
187 arg);
188 kmalloc_ok = save_kmalloc_ok;
189}
190
191unsigned long stack_sp(unsigned long page)
192{
193 return(page + PAGE_SIZE - sizeof(void *));
194}
195
196int current_pid(void)
197{
198 return(current->pid);
199}
200
201void default_idle(void)
202{
203 CHOOSE_MODE(uml_idle_timer(), (void) 0);
204
205 while(1){
206 /* endless idle loop with no priority at all */
207
208 /*
209 * although we are an idle CPU, we do not want to
210 * get into the scheduler unnecessarily.
211 */
212 if(need_resched())
213 schedule();
214
215 idle_sleep(10);
216 }
217}
218
219void cpu_idle(void)
220{
221 CHOOSE_MODE(init_idle_tt(), init_idle_skas());
222}
223
224int page_size(void)
225{
226 return(PAGE_SIZE);
227}
228
229void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
230 pte_t *pte_out)
231{
232 pgd_t *pgd;
233 pud_t *pud;
234 pmd_t *pmd;
235 pte_t *pte;
236 pte_t ptent;
237
238 if(task->mm == NULL)
239 return(ERR_PTR(-EINVAL));
240 pgd = pgd_offset(task->mm, addr);
241 if(!pgd_present(*pgd))
242 return(ERR_PTR(-EINVAL));
243
244 pud = pud_offset(pgd, addr);
245 if(!pud_present(*pud))
246 return(ERR_PTR(-EINVAL));
247
248 pmd = pmd_offset(pud, addr);
249 if(!pmd_present(*pmd))
250 return(ERR_PTR(-EINVAL));
251
252 pte = pte_offset_kernel(pmd, addr);
253 ptent = *pte;
254 if(!pte_present(ptent))
255 return(ERR_PTR(-EINVAL));
256
257 if(pte_out != NULL)
258 *pte_out = ptent;
259 return((void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK));
260}
261
262char *current_cmd(void)
263{
264#if defined(CONFIG_SMP) || defined(CONFIG_HIGHMEM)
265 return("(Unknown)");
266#else
267 void *addr = um_virt_to_phys(current, current->mm->arg_start, NULL);
268 return IS_ERR(addr) ? "(Unknown)": __va((unsigned long) addr);
269#endif
270}
271
272void force_sigbus(void)
273{
274 printk(KERN_ERR "Killing pid %d because of a lack of memory\n",
275 current->pid);
276 lock_kernel();
277 sigaddset(&current->pending.signal, SIGBUS);
278 recalc_sigpending();
279 current->flags |= PF_SIGNALED;
280 do_exit(SIGBUS | 0x80);
281}
282
283void dump_thread(struct pt_regs *regs, struct user *u)
284{
285}
286
287void enable_hlt(void)
288{
289 panic("enable_hlt");
290}
291
292EXPORT_SYMBOL(enable_hlt);
293
294void disable_hlt(void)
295{
296 panic("disable_hlt");
297}
298
299EXPORT_SYMBOL(disable_hlt);
300
301void *um_kmalloc(int size)
302{
303 return kmalloc(size, GFP_KERNEL);
304}
305
306void *um_kmalloc_atomic(int size)
307{
308 return kmalloc(size, GFP_ATOMIC);
309}
310
311void *um_vmalloc(int size)
312{
313 return vmalloc(size);
314}
315
316void *um_vmalloc_atomic(int size)
317{
318 return __vmalloc(size, GFP_ATOMIC | __GFP_HIGHMEM, PAGE_KERNEL);
319}
320
321int __cant_sleep(void) {
322 return in_atomic() || irqs_disabled() || in_interrupt();
323 /* Is in_interrupt() really needed? */
324}
325
326unsigned long get_fault_addr(void)
327{
328 return((unsigned long) current->thread.fault_addr);
329}
330
331EXPORT_SYMBOL(get_fault_addr);
332
333void not_implemented(void)
334{
335 printk(KERN_DEBUG "Something isn't implemented in here\n");
336}
337
338EXPORT_SYMBOL(not_implemented);
339
340int user_context(unsigned long sp)
341{
342 unsigned long stack;
343
344 stack = sp & (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER);
345 return(stack != (unsigned long) current_thread);
346}
347
348extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;
349
350void do_uml_exitcalls(void)
351{
352 exitcall_t *call;
353
354 call = &__uml_exitcall_end;
355 while (--call >= &__uml_exitcall_begin)
356 (*call)();
357}
358
359char *uml_strdup(char *string)
360{
361 return kstrdup(string, GFP_KERNEL);
362}
363
364int copy_to_user_proc(void __user *to, void *from, int size)
365{
366 return(copy_to_user(to, from, size));
367}
368
369int copy_from_user_proc(void *to, void __user *from, int size)
370{
371 return(copy_from_user(to, from, size));
372}
373
374int clear_user_proc(void __user *buf, int size)
375{
376 return(clear_user(buf, size));
377}
378
379int strlen_user_proc(char __user *str)
380{
381 return(strlen_user(str));
382}
383
384int smp_sigio_handler(void)
385{
386#ifdef CONFIG_SMP
387 int cpu = current_thread->cpu;
388 IPI_handler(cpu);
389 if(cpu != 0)
390 return(1);
391#endif
392 return(0);
393}
394
395int cpu(void)
396{
397 return(current_thread->cpu);
398}
399
400static atomic_t using_sysemu = ATOMIC_INIT(0);
401int sysemu_supported;
402
403void set_using_sysemu(int value)
404{
405 if (value > sysemu_supported)
406 return;
407 atomic_set(&using_sysemu, value);
408}
409
410int get_using_sysemu(void)
411{
412 return atomic_read(&using_sysemu);
413}
414
415static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data)
416{
417 if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size) /*No overflow*/
418 *eof = 1;
419
420 return strlen(buf);
421}
422
423static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned long count,void *data)
424{
425 char tmp[2];
426
427 if (copy_from_user(tmp, buf, 1))
428 return -EFAULT;
429
430 if (tmp[0] >= '0' && tmp[0] <= '2')
431 set_using_sysemu(tmp[0] - '0');
432 return count; /*We use the first char, but pretend to write everything*/
433}
434
435int __init make_proc_sysemu(void)
436{
437 struct proc_dir_entry *ent;
438 if (!sysemu_supported)
439 return 0;
440
441 ent = create_proc_entry("sysemu", 0600, &proc_root);
442
443 if (ent == NULL)
444 {
445 printk(KERN_WARNING "Failed to register /proc/sysemu\n");
446 return(0);
447 }
448
449 ent->read_proc = proc_read_sysemu;
450 ent->write_proc = proc_write_sysemu;
451
452 return 0;
453}
454
455late_initcall(make_proc_sysemu);
456
457int singlestepping(void * t)
458{
459 struct task_struct *task = t ? t : current;
460
461 if ( ! (task->ptrace & PT_DTRACE) )
462 return(0);
463
464 if (task->thread.singlestep_syscall)
465 return(1);
466
467 return 2;
468}
469
470/*
471 * Only x86 and x86_64 have an arch_align_stack().
472 * All other arches have "#define arch_align_stack(x) (x)"
473 * in their asm/system.h
474 * As this is included in UML from asm-um/system-generic.h,
475 * we can use it to behave as the subarch does.
476 */
477#ifndef arch_align_stack
478unsigned long arch_align_stack(unsigned long sp)
479{
480 if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
481 sp -= get_random_int() % 8192;
482 return sp & ~0xf;
483}
484#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 17:24:05 -0500