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authorJeff Dike <jdike@addtoit.com>2007-10-16 04:27:00 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 12:43:05 -0400
commitba180fd437156f7fd8cfb2fdd021d949eeef08d6 (patch)
treeb9f38b9cdd7a5b1aacf00341d1948314663c5871 /arch/um/kernel
parent77bf4400319db9d2a8af6b00c2be6faa0f3d07cb (diff)
uml: style fixes pass 3
Formatting changes in the files which have been changed in the course of folding foo_skas functions into their callers. These include: copyright updates header file trimming style fixes adding severity to printks These changes should be entirely non-functional. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel')
-rw-r--r--arch/um/kernel/exec.c41
-rw-r--r--arch/um/kernel/irq.c85
-rw-r--r--arch/um/kernel/physmem.c9
-rw-r--r--arch/um/kernel/process.c110
-rw-r--r--arch/um/kernel/ptrace.c114
-rw-r--r--arch/um/kernel/reboot.c12
-rw-r--r--arch/um/kernel/signal.c58
-rw-r--r--arch/um/kernel/skas/Makefile2
-rw-r--r--arch/um/kernel/skas/mmu.c64
-rw-r--r--arch/um/kernel/skas/process.c27
-rw-r--r--arch/um/kernel/skas/syscall.c17
-rw-r--r--arch/um/kernel/syscall.c38
-rw-r--r--arch/um/kernel/time.c32
-rw-r--r--arch/um/kernel/tlb.c158
-rw-r--r--arch/um/kernel/um_arch.c74
15 files changed, 375 insertions, 466 deletions
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index 5064fb691eb5..0d260567fd15 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -1,24 +1,19 @@
1/* 1/*
2 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/slab.h" 6#include "linux/stddef.h"
7#include "linux/fs.h"
7#include "linux/smp_lock.h" 8#include "linux/smp_lock.h"
8#include "linux/ptrace.h" 9#include "linux/ptrace.h"
9#include "linux/fs.h" 10#include "linux/sched.h"
10#include "asm/ptrace.h" 11#include "asm/current.h"
11#include "asm/pgtable.h" 12#include "asm/processor.h"
12#include "asm/tlbflush.h"
13#include "asm/uaccess.h" 13#include "asm/uaccess.h"
14#include "kern_util.h"
15#include "as-layout.h"
16#include "mem_user.h" 14#include "mem_user.h"
17#include "kern.h" 15#include "skas.h"
18#include "irq_user.h"
19#include "tlb.h"
20#include "os.h" 16#include "os.h"
21#include "skas/skas.h"
22 17
23void flush_thread(void) 18void flush_thread(void)
24{ 19{
@@ -29,8 +24,8 @@ void flush_thread(void)
29 arch_flush_thread(&current->thread.arch); 24 arch_flush_thread(&current->thread.arch);
30 25
31 ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data); 26 ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
32 if(ret){ 27 if (ret) {
33 printk("flush_thread - clearing address space failed, " 28 printk(KERN_ERR "flush_thread - clearing address space failed, "
34 "err = %d\n", ret); 29 "err = %d\n", ret);
35 force_sig(SIGKILL, current); 30 force_sig(SIGKILL, current);
36 } 31 }
@@ -52,7 +47,7 @@ extern void log_exec(char **argv, void *tty);
52static long execve1(char *file, char __user * __user *argv, 47static long execve1(char *file, char __user * __user *argv,
53 char __user *__user *env) 48 char __user *__user *env)
54{ 49{
55 long error; 50 long error;
56#ifdef CONFIG_TTY_LOG 51#ifdef CONFIG_TTY_LOG
57 struct tty_struct *tty; 52 struct tty_struct *tty;
58 53
@@ -62,16 +57,16 @@ static long execve1(char *file, char __user * __user *argv,
62 log_exec(argv, tty); 57 log_exec(argv, tty);
63 mutex_unlock(&tty_mutex); 58 mutex_unlock(&tty_mutex);
64#endif 59#endif
65 error = do_execve(file, argv, env, &current->thread.regs); 60 error = do_execve(file, argv, env, &current->thread.regs);
66 if (error == 0){ 61 if (error == 0) {
67 task_lock(current); 62 task_lock(current);
68 current->ptrace &= ~PT_DTRACE; 63 current->ptrace &= ~PT_DTRACE;
69#ifdef SUBARCH_EXECVE1 64#ifdef SUBARCH_EXECVE1
70 SUBARCH_EXECVE1(&current->thread.regs.regs); 65 SUBARCH_EXECVE1(&current->thread.regs.regs);
71#endif 66#endif
72 task_unlock(current); 67 task_unlock(current);
73 } 68 }
74 return(error); 69 return error;
75} 70}
76 71
77long um_execve(char *file, char __user *__user *argv, char __user *__user *env) 72long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
@@ -79,9 +74,9 @@ long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
79 long err; 74 long err;
80 75
81 err = execve1(file, argv, env); 76 err = execve1(file, argv, env);
82 if(!err) 77 if (!err)
83 do_longjmp(current->thread.exec_buf, 1); 78 do_longjmp(current->thread.exec_buf, 1);
84 return(err); 79 return err;
85} 80}
86 81
87long sys_execve(char __user *file, char __user *__user *argv, 82long sys_execve(char __user *file, char __user *__user *argv,
@@ -98,5 +93,5 @@ long sys_execve(char __user *file, char __user *__user *argv,
98 putname(filename); 93 putname(filename);
99 out: 94 out:
100 unlock_kernel(); 95 unlock_kernel();
101 return(error); 96 return error;
102} 97}
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index b10ee28b97cb..277fce17b088 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -1,37 +1,19 @@
1/* 1/*
2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c: 4 * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
5 * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar 5 * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
6 */ 6 */
7 7
8#include "linux/kernel.h" 8#include "linux/cpumask.h"
9#include "linux/module.h" 9#include "linux/hardirq.h"
10#include "linux/smp.h"
11#include "linux/kernel_stat.h"
12#include "linux/interrupt.h" 10#include "linux/interrupt.h"
13#include "linux/random.h" 11#include "linux/kernel_stat.h"
14#include "linux/slab.h" 12#include "linux/module.h"
15#include "linux/file.h"
16#include "linux/proc_fs.h"
17#include "linux/init.h"
18#include "linux/seq_file.h" 13#include "linux/seq_file.h"
19#include "linux/profile.h" 14#include "as-layout.h"
20#include "linux/hardirq.h"
21#include "asm/irq.h"
22#include "asm/hw_irq.h"
23#include "asm/atomic.h"
24#include "asm/signal.h"
25#include "asm/system.h"
26#include "asm/errno.h"
27#include "asm/uaccess.h"
28#include "kern_util.h" 15#include "kern_util.h"
29#include "irq_user.h"
30#include "irq_kern.h"
31#include "os.h" 16#include "os.h"
32#include "sigio.h"
33#include "misc_constants.h"
34#include "as-layout.h"
35 17
36/* 18/*
37 * Generic, controller-independent functions: 19 * Generic, controller-independent functions:
@@ -71,9 +53,8 @@ int show_interrupts(struct seq_file *p, void *v)
71 seq_putc(p, '\n'); 53 seq_putc(p, '\n');
72skip: 54skip:
73 spin_unlock_irqrestore(&irq_desc[i].lock, flags); 55 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
74 } else if (i == NR_IRQS) { 56 } else if (i == NR_IRQS)
75 seq_putc(p, '\n'); 57 seq_putc(p, '\n');
76 }
77 58
78 return 0; 59 return 0;
79} 60}
@@ -102,11 +83,13 @@ void sigio_handler(int sig, struct uml_pt_regs *regs)
102 while (1) { 83 while (1) {
103 n = os_waiting_for_events(active_fds); 84 n = os_waiting_for_events(active_fds);
104 if (n <= 0) { 85 if (n <= 0) {
105 if(n == -EINTR) continue; 86 if (n == -EINTR)
87 continue;
106 else break; 88 else break;
107 } 89 }
108 90
109 for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) { 91 for (irq_fd = active_fds; irq_fd != NULL;
92 irq_fd = irq_fd->next) {
110 if (irq_fd->current_events != 0) { 93 if (irq_fd->current_events != 0) {
111 irq_fd->current_events = 0; 94 irq_fd->current_events = 0;
112 do_IRQ(irq_fd->irq, regs); 95 do_IRQ(irq_fd->irq, regs);
@@ -138,8 +121,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
138 121
139 if (type == IRQ_READ) 122 if (type == IRQ_READ)
140 events = UM_POLLIN | UM_POLLPRI; 123 events = UM_POLLIN | UM_POLLPRI;
141 else 124 else events = UM_POLLOUT;
142 events = UM_POLLOUT;
143 *new_fd = ((struct irq_fd) { .next = NULL, 125 *new_fd = ((struct irq_fd) { .next = NULL,
144 .id = dev_id, 126 .id = dev_id,
145 .fd = fd, 127 .fd = fd,
@@ -153,9 +135,10 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
153 spin_lock_irqsave(&irq_lock, flags); 135 spin_lock_irqsave(&irq_lock, flags);
154 for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) { 136 for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
155 if ((irq_fd->fd == fd) && (irq_fd->type == type)) { 137 if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
156 printk("Registering fd %d twice\n", fd); 138 printk(KERN_ERR "Registering fd %d twice\n", fd);
157 printk("Irqs : %d, %d\n", irq_fd->irq, irq); 139 printk(KERN_ERR "Irqs : %d, %d\n", irq_fd->irq, irq);
158 printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id); 140 printk(KERN_ERR "Ids : 0x%p, 0x%p\n", irq_fd->id,
141 dev_id);
159 goto out_unlock; 142 goto out_unlock;
160 } 143 }
161 } 144 }
@@ -171,7 +154,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
171 if (n == 0) 154 if (n == 0)
172 break; 155 break;
173 156
174 /* n > 0 157 /*
158 * n > 0
175 * It means we couldn't put new pollfd to current pollfds 159 * It means we couldn't put new pollfd to current pollfds
176 * and tmp_fds is NULL or too small for new pollfds array. 160 * and tmp_fds is NULL or too small for new pollfds array.
177 * Needed size is equal to n as minimum. 161 * Needed size is equal to n as minimum.
@@ -197,7 +181,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
197 181
198 spin_unlock_irqrestore(&irq_lock, flags); 182 spin_unlock_irqrestore(&irq_lock, flags);
199 183
200 /* This calls activate_fd, so it has to be outside the critical 184 /*
185 * This calls activate_fd, so it has to be outside the critical
201 * section. 186 * section.
202 */ 187 */
203 maybe_sigio_broken(fd, (type == IRQ_READ)); 188 maybe_sigio_broken(fd, (type == IRQ_READ));
@@ -264,13 +249,14 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
264 i++; 249 i++;
265 } 250 }
266 if (irq == NULL) { 251 if (irq == NULL) {
267 printk("find_irq_by_fd doesn't have descriptor %d\n", fd); 252 printk(KERN_ERR "find_irq_by_fd doesn't have descriptor %d\n",
253 fd);
268 goto out; 254 goto out;
269 } 255 }
270 fdi = os_get_pollfd(i); 256 fdi = os_get_pollfd(i);
271 if ((fdi != -1) && (fdi != fd)) { 257 if ((fdi != -1) && (fdi != fd)) {
272 printk("find_irq_by_fd - mismatch between active_fds and " 258 printk(KERN_ERR "find_irq_by_fd - mismatch between active_fds "
273 "pollfds, fd %d vs %d, need %d\n", irq->fd, 259 "and pollfds, fd %d vs %d, need %d\n", irq->fd,
274 fdi, fd); 260 fdi, fd);
275 irq = NULL; 261 irq = NULL;
276 goto out; 262 goto out;
@@ -306,7 +292,7 @@ void deactivate_fd(int fd, int irqnum)
306 292
307 spin_lock_irqsave(&irq_lock, flags); 293 spin_lock_irqsave(&irq_lock, flags);
308 irq = find_irq_by_fd(fd, irqnum, &i); 294 irq = find_irq_by_fd(fd, irqnum, &i);
309 if(irq == NULL){ 295 if (irq == NULL) {
310 spin_unlock_irqrestore(&irq_lock, flags); 296 spin_unlock_irqrestore(&irq_lock, flags);
311 return; 297 return;
312 } 298 }
@@ -372,8 +358,10 @@ int um_request_irq(unsigned int irq, int fd, int type,
372EXPORT_SYMBOL(um_request_irq); 358EXPORT_SYMBOL(um_request_irq);
373EXPORT_SYMBOL(reactivate_fd); 359EXPORT_SYMBOL(reactivate_fd);
374 360
375/* hw_interrupt_type must define (startup || enable) && 361/*
376 * (shutdown || disable) && end */ 362 * hw_interrupt_type must define (startup || enable) &&
363 * (shutdown || disable) && end
364 */
377static void dummy(unsigned int irq) 365static void dummy(unsigned int irq)
378{ 366{
379} 367}
@@ -422,7 +410,8 @@ int init_aio_irq(int irq, char *name, irq_handler_t handler)
422 410
423 err = os_pipe(fds, 1, 1); 411 err = os_pipe(fds, 1, 1);
424 if (err) { 412 if (err) {
425 printk("init_aio_irq - os_pipe failed, err = %d\n", -err); 413 printk(KERN_ERR "init_aio_irq - os_pipe failed, err = %d\n",
414 -err);
426 goto out; 415 goto out;
427 } 416 }
428 417
@@ -430,7 +419,8 @@ int init_aio_irq(int irq, char *name, irq_handler_t handler)
430 IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name, 419 IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name,
431 (void *) (long) fds[0]); 420 (void *) (long) fds[0]);
432 if (err) { 421 if (err) {
433 printk("init_aio_irq - : um_request_irq failed, err = %d\n", 422 printk(KERN_ERR "init_aio_irq - : um_request_irq failed, "
423 "err = %d\n",
434 err); 424 err);
435 goto out_close; 425 goto out_close;
436 } 426 }
@@ -501,8 +491,9 @@ unsigned long to_irq_stack(unsigned long *mask_out)
501 int nested; 491 int nested;
502 492
503 mask = xchg(&pending_mask, *mask_out); 493 mask = xchg(&pending_mask, *mask_out);
504 if(mask != 0){ 494 if (mask != 0) {
505 /* If any interrupts come in at this point, we want to 495 /*
496 * If any interrupts come in at this point, we want to
506 * make sure that their bits aren't lost by our 497 * make sure that their bits aren't lost by our
507 * putting our bit in. So, this loop accumulates bits 498 * putting our bit in. So, this loop accumulates bits
508 * until xchg returns the same value that we put in. 499 * until xchg returns the same value that we put in.
@@ -514,13 +505,13 @@ unsigned long to_irq_stack(unsigned long *mask_out)
514 do { 505 do {
515 old |= mask; 506 old |= mask;
516 mask = xchg(&pending_mask, old); 507 mask = xchg(&pending_mask, old);
517 } while(mask != old); 508 } while (mask != old);
518 return 1; 509 return 1;
519 } 510 }
520 511
521 ti = current_thread_info(); 512 ti = current_thread_info();
522 nested = (ti->real_thread != NULL); 513 nested = (ti->real_thread != NULL);
523 if(!nested){ 514 if (!nested) {
524 struct task_struct *task; 515 struct task_struct *task;
525 struct thread_info *tti; 516 struct thread_info *tti;
526 517
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 90e89e838173..a55d221d8a4c 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -75,7 +75,7 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
75 err = os_map_memory((void *) virt, fd, offset, len, r, w, x); 75 err = os_map_memory((void *) virt, fd, offset, len, r, w, x);
76 if (err) { 76 if (err) {
77 if (err == -ENOMEM) 77 if (err == -ENOMEM)
78 printk("try increasing the host's " 78 printk(KERN_ERR "try increasing the host's "
79 "/proc/sys/vm/max_map_count to <physical " 79 "/proc/sys/vm/max_map_count to <physical "
80 "memory size>/4096\n"); 80 "memory size>/4096\n");
81 panic("map_memory(0x%lx, %d, 0x%llx, %ld, %d, %d, %d) failed, " 81 panic("map_memory(0x%lx, %d, 0x%llx, %ld, %d, %d, %d) failed, "
@@ -103,7 +103,8 @@ void __init setup_physmem(unsigned long start, unsigned long reserve_end,
103 exit(1); 103 exit(1);
104 } 104 }
105 105
106 /* Special kludge - This page will be mapped in to userspace processes 106 /*
107 * Special kludge - This page will be mapped in to userspace processes
107 * from physmem_fd, so it needs to be written out there. 108 * from physmem_fd, so it needs to be written out there.
108 */ 109 */
109 os_seek_file(physmem_fd, __pa(&__syscall_stub_start)); 110 os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
@@ -202,8 +203,8 @@ int setup_iomem(void)
202 err = os_map_memory((void *) iomem_start, region->fd, 0, 203 err = os_map_memory((void *) iomem_start, region->fd, 0,
203 region->size, 1, 1, 0); 204 region->size, 1, 1, 0);
204 if (err) 205 if (err)
205 printk("Mapping iomem region for driver '%s' failed, " 206 printk(KERN_ERR "Mapping iomem region for driver '%s' "
206 "errno = %d\n", region->driver, -err); 207 "failed, errno = %d\n", region->driver, -err);
207 else { 208 else {
208 region->virt = iomem_start; 209 region->virt = iomem_start;
209 region->phys = __pa(region->virt); 210 region->phys = __pa(region->virt);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index d3b9c62e73c7..7c037fa9c5b8 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -1,51 +1,29 @@
1/* 1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Copyright 2003 PathScale, Inc. 3 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL 4 * Licensed under the GPL
5 */ 5 */
6 6
7#include "linux/kernel.h" 7#include "linux/stddef.h"
8#include "linux/sched.h" 8#include "linux/err.h"
9#include "linux/interrupt.h" 9#include "linux/hardirq.h"
10#include "linux/string.h"
11#include "linux/mm.h" 10#include "linux/mm.h"
12#include "linux/slab.h" 11#include "linux/personality.h"
13#include "linux/utsname.h"
14#include "linux/fs.h"
15#include "linux/utime.h"
16#include "linux/smp_lock.h"
17#include "linux/module.h"
18#include "linux/init.h"
19#include "linux/capability.h"
20#include "linux/vmalloc.h"
21#include "linux/spinlock.h"
22#include "linux/proc_fs.h" 12#include "linux/proc_fs.h"
23#include "linux/ptrace.h" 13#include "linux/ptrace.h"
24#include "linux/random.h" 14#include "linux/random.h"
25#include "linux/personality.h" 15#include "linux/sched.h"
26#include "asm/unistd.h" 16#include "linux/threads.h"
27#include "asm/mman.h"
28#include "asm/segment.h"
29#include "asm/stat.h"
30#include "asm/pgtable.h" 17#include "asm/pgtable.h"
31#include "asm/processor.h"
32#include "asm/tlbflush.h"
33#include "asm/uaccess.h" 18#include "asm/uaccess.h"
34#include "asm/user.h"
35#include "kern_util.h"
36#include "as-layout.h" 19#include "as-layout.h"
37#include "kern.h" 20#include "kern_util.h"
38#include "signal_kern.h"
39#include "init.h"
40#include "irq_user.h"
41#include "mem_user.h"
42#include "tlb.h"
43#include "frame_kern.h"
44#include "sigcontext.h"
45#include "os.h" 21#include "os.h"
46#include "skas.h" 22#include "skas.h"
23#include "tlb.h"
47 24
48/* This is a per-cpu array. A processor only modifies its entry and it only 25/*
26 * This is a per-cpu array. A processor only modifies its entry and it only
49 * cares about its entry, so it's OK if another processor is modifying its 27 * cares about its entry, so it's OK if another processor is modifying its
50 * entry. 28 * entry.
51 */ 29 */
@@ -54,15 +32,15 @@ struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
54static inline int external_pid(struct task_struct *task) 32static inline int external_pid(struct task_struct *task)
55{ 33{
56 /* FIXME: Need to look up userspace_pid by cpu */ 34 /* FIXME: Need to look up userspace_pid by cpu */
57 return(userspace_pid[0]); 35 return userspace_pid[0];
58} 36}
59 37
60int pid_to_processor_id(int pid) 38int pid_to_processor_id(int pid)
61{ 39{
62 int i; 40 int i;
63 41
64 for(i = 0; i < ncpus; i++){ 42 for(i = 0; i < ncpus; i++) {
65 if(cpu_tasks[i].pid == pid) 43 if (cpu_tasks[i].pid == pid)
66 return i; 44 return i;
67 } 45 }
68 return -1; 46 return -1;
@@ -118,7 +96,7 @@ void *_switch_to(void *prev, void *next, void *last)
118 current->thread.saved_task = NULL; 96 current->thread.saved_task = NULL;
119 97
120 /* XXX need to check runqueues[cpu].idle */ 98 /* XXX need to check runqueues[cpu].idle */
121 if(current->pid == 0) 99 if (current->pid == 0)
122 switch_timers(0); 100 switch_timers(0);
123 101
124 switch_threads(&from->thread.switch_buf, 102 switch_threads(&from->thread.switch_buf,
@@ -126,10 +104,10 @@ void *_switch_to(void *prev, void *next, void *last)
126 104
127 arch_switch_to(current->thread.prev_sched, current); 105 arch_switch_to(current->thread.prev_sched, current);
128 106
129 if(current->pid == 0) 107 if (current->pid == 0)
130 switch_timers(1); 108 switch_timers(1);
131 109
132 if(current->thread.saved_task) 110 if (current->thread.saved_task)
133 show_regs(&(current->thread.regs)); 111 show_regs(&(current->thread.regs));
134 next= current->thread.saved_task; 112 next= current->thread.saved_task;
135 prev= current; 113 prev= current;
@@ -141,9 +119,9 @@ void *_switch_to(void *prev, void *next, void *last)
141 119
142void interrupt_end(void) 120void interrupt_end(void)
143{ 121{
144 if(need_resched()) 122 if (need_resched())
145 schedule(); 123 schedule();
146 if(test_tsk_thread_flag(current, TIF_SIGPENDING)) 124 if (test_tsk_thread_flag(current, TIF_SIGPENDING))
147 do_signal(); 125 do_signal();
148} 126}
149 127
@@ -158,7 +136,8 @@ void *get_current(void)
158 136
159extern void schedule_tail(struct task_struct *prev); 137extern void schedule_tail(struct task_struct *prev);
160 138
161/* This is called magically, by its address being stuffed in a jmp_buf 139/*
140 * This is called magically, by its address being stuffed in a jmp_buf
162 * and being longjmp-d to. 141 * and being longjmp-d to.
163 */ 142 */
164void new_thread_handler(void) 143void new_thread_handler(void)
@@ -166,18 +145,19 @@ void new_thread_handler(void)
166 int (*fn)(void *), n; 145 int (*fn)(void *), n;
167 void *arg; 146 void *arg;
168 147
169 if(current->thread.prev_sched != NULL) 148 if (current->thread.prev_sched != NULL)
170 schedule_tail(current->thread.prev_sched); 149 schedule_tail(current->thread.prev_sched);
171 current->thread.prev_sched = NULL; 150 current->thread.prev_sched = NULL;
172 151
173 fn = current->thread.request.u.thread.proc; 152 fn = current->thread.request.u.thread.proc;
174 arg = current->thread.request.u.thread.arg; 153 arg = current->thread.request.u.thread.arg;
175 154
176 /* The return value is 1 if the kernel thread execs a process, 155 /*
156 * The return value is 1 if the kernel thread execs a process,
177 * 0 if it just exits 157 * 0 if it just exits
178 */ 158 */
179 n = run_kernel_thread(fn, arg, &current->thread.exec_buf); 159 n = run_kernel_thread(fn, arg, &current->thread.exec_buf);
180 if(n == 1){ 160 if (n == 1) {
181 /* Handle any immediate reschedules or signals */ 161 /* Handle any immediate reschedules or signals */
182 interrupt_end(); 162 interrupt_end();
183 userspace(&current->thread.regs.regs); 163 userspace(&current->thread.regs.regs);
@@ -189,14 +169,16 @@ void new_thread_handler(void)
189void fork_handler(void) 169void fork_handler(void)
190{ 170{
191 force_flush_all(); 171 force_flush_all();
192 if(current->thread.prev_sched == NULL) 172 if (current->thread.prev_sched == NULL)
193 panic("blech"); 173 panic("blech");
194 174
195 schedule_tail(current->thread.prev_sched); 175 schedule_tail(current->thread.prev_sched);
196 176
197 /* XXX: if interrupt_end() calls schedule, this call to 177 /*
178 * XXX: if interrupt_end() calls schedule, this call to
198 * arch_switch_to isn't needed. We could want to apply this to 179 * arch_switch_to isn't needed. We could want to apply this to
199 * improve performance. -bb */ 180 * improve performance. -bb
181 */
200 arch_switch_to(current->thread.prev_sched, current); 182 arch_switch_to(current->thread.prev_sched, current);
201 183
202 current->thread.prev_sched = NULL; 184 current->thread.prev_sched = NULL;
@@ -216,11 +198,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
216 198
217 p->thread = (struct thread_struct) INIT_THREAD; 199 p->thread = (struct thread_struct) INIT_THREAD;
218 200
219 if(current->thread.forking){ 201 if (current->thread.forking) {
220 memcpy(&p->thread.regs.regs, &regs->regs, 202 memcpy(&p->thread.regs.regs, &regs->regs,
221 sizeof(p->thread.regs.regs)); 203 sizeof(p->thread.regs.regs));
222 REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.regs, 0); 204 REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.regs, 0);
223 if(sp != 0) 205 if (sp != 0)
224 REGS_SP(p->thread.regs.regs.regs) = sp; 206 REGS_SP(p->thread.regs.regs.regs) = sp;
225 207
226 handler = fork_handler; 208 handler = fork_handler;
@@ -259,14 +241,14 @@ void initial_thread_cb(void (*proc)(void *), void *arg)
259 241
260void default_idle(void) 242void default_idle(void)
261{ 243{
262 while(1){ 244 while(1) {
263 /* endless idle loop with no priority at all */ 245 /* endless idle loop with no priority at all */
264 246
265 /* 247 /*
266 * although we are an idle CPU, we do not want to 248 * although we are an idle CPU, we do not want to
267 * get into the scheduler unnecessarily. 249 * get into the scheduler unnecessarily.
268 */ 250 */
269 if(need_resched()) 251 if (need_resched())
270 schedule(); 252 schedule();
271 253
272 idle_sleep(10); 254 idle_sleep(10);
@@ -288,26 +270,26 @@ void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
288 pte_t *pte; 270 pte_t *pte;
289 pte_t ptent; 271 pte_t ptent;
290 272
291 if(task->mm == NULL) 273 if (task->mm == NULL)
292 return ERR_PTR(-EINVAL); 274 return ERR_PTR(-EINVAL);
293 pgd = pgd_offset(task->mm, addr); 275 pgd = pgd_offset(task->mm, addr);
294 if(!pgd_present(*pgd)) 276 if (!pgd_present(*pgd))
295 return ERR_PTR(-EINVAL); 277 return ERR_PTR(-EINVAL);
296 278
297 pud = pud_offset(pgd, addr); 279 pud = pud_offset(pgd, addr);
298 if(!pud_present(*pud)) 280 if (!pud_present(*pud))
299 return ERR_PTR(-EINVAL); 281 return ERR_PTR(-EINVAL);
300 282
301 pmd = pmd_offset(pud, addr); 283 pmd = pmd_offset(pud, addr);
302 if(!pmd_present(*pmd)) 284 if (!pmd_present(*pmd))
303 return ERR_PTR(-EINVAL); 285 return ERR_PTR(-EINVAL);
304 286
305 pte = pte_offset_kernel(pmd, addr); 287 pte = pte_offset_kernel(pmd, addr);
306 ptent = *pte; 288 ptent = *pte;
307 if(!pte_present(ptent)) 289 if (!pte_present(ptent))
308 return ERR_PTR(-EINVAL); 290 return ERR_PTR(-EINVAL);
309 291
310 if(pte_out != NULL) 292 if (pte_out != NULL)
311 *pte_out = ptent; 293 *pte_out = ptent;
312 return (void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK); 294 return (void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK);
313} 295}
@@ -380,7 +362,7 @@ int smp_sigio_handler(void)
380#ifdef CONFIG_SMP 362#ifdef CONFIG_SMP
381 int cpu = current_thread->cpu; 363 int cpu = current_thread->cpu;
382 IPI_handler(cpu); 364 IPI_handler(cpu);
383 if(cpu != 0) 365 if (cpu != 0)
384 return 1; 366 return 1;
385#endif 367#endif
386 return 0; 368 return 0;
@@ -408,7 +390,8 @@ int get_using_sysemu(void)
408 390
409static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data) 391static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data)
410{ 392{
411 if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size) /*No overflow*/ 393 if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size)
394 /* No overflow */
412 *eof = 1; 395 *eof = 1;
413 396
414 return strlen(buf); 397 return strlen(buf);
@@ -423,7 +406,8 @@ static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned
423 406
424 if (tmp[0] >= '0' && tmp[0] <= '2') 407 if (tmp[0] >= '0' && tmp[0] <= '2')
425 set_using_sysemu(tmp[0] - '0'); 408 set_using_sysemu(tmp[0] - '0');
426 return count; /*We use the first char, but pretend to write everything*/ 409 /* We use the first char, but pretend to write everything */
410 return count;
427} 411}
428 412
429int __init make_proc_sysemu(void) 413int __init make_proc_sysemu(void)
@@ -453,10 +437,10 @@ int singlestepping(void * t)
453 struct task_struct *task = t ? t : current; 437 struct task_struct *task = t ? t : current;
454 438
455 if ( ! (task->ptrace & PT_DTRACE) ) 439 if ( ! (task->ptrace & PT_DTRACE) )
456 return(0); 440 return 0;
457 441
458 if (task->thread.singlestep_syscall) 442 if (task->thread.singlestep_syscall)
459 return(1); 443 return 1;
460 444
461 return 2; 445 return 2;
462} 446}
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index bbc3a4a9a0fa..db55a017e9b9 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -1,35 +1,27 @@
1/* 1/*
2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/sched.h"
7#include "linux/mm.h"
8#include "linux/errno.h"
9#include "linux/smp_lock.h"
10#include "linux/security.h"
11#include "linux/ptrace.h"
12#include "linux/audit.h" 6#include "linux/audit.h"
7#include "linux/ptrace.h"
8#include "linux/sched.h"
9#include "asm/uaccess.h"
13#ifdef CONFIG_PROC_MM 10#ifdef CONFIG_PROC_MM
14#include "linux/proc_mm.h" 11#include "proc_mm.h"
15#endif 12#endif
16#include "asm/ptrace.h"
17#include "asm/uaccess.h"
18#include "kern_util.h"
19#include "skas_ptrace.h" 13#include "skas_ptrace.h"
20#include "sysdep/ptrace.h"
21#include "os.h"
22 14
23static inline void set_singlestepping(struct task_struct *child, int on) 15static inline void set_singlestepping(struct task_struct *child, int on)
24{ 16{
25 if (on) 17 if (on)
26 child->ptrace |= PT_DTRACE; 18 child->ptrace |= PT_DTRACE;
27 else 19 else
28 child->ptrace &= ~PT_DTRACE; 20 child->ptrace &= ~PT_DTRACE;
29 child->thread.singlestep_syscall = 0; 21 child->thread.singlestep_syscall = 0;
30 22
31#ifdef SUBARCH_SET_SINGLESTEPPING 23#ifdef SUBARCH_SET_SINGLESTEPPING
32 SUBARCH_SET_SINGLESTEPPING(child, on); 24 SUBARCH_SET_SINGLESTEPPING(child, on);
33#endif 25#endif
34} 26}
35 27
@@ -37,8 +29,8 @@ static inline void set_singlestepping(struct task_struct *child, int on)
37 * Called by kernel/ptrace.c when detaching.. 29 * Called by kernel/ptrace.c when detaching..
38 */ 30 */
39void ptrace_disable(struct task_struct *child) 31void ptrace_disable(struct task_struct *child)
40{ 32{
41 set_singlestepping(child,0); 33 set_singlestepping(child,0);
42} 34}
43 35
44extern int peek_user(struct task_struct * child, long addr, long data); 36extern int peek_user(struct task_struct * child, long addr, long data);
@@ -50,40 +42,40 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
50 unsigned long __user *p = (void __user *)(unsigned long)data; 42 unsigned long __user *p = (void __user *)(unsigned long)data;
51 43
52 switch (request) { 44 switch (request) {
53 /* when I and D space are separate, these will need to be fixed. */ 45 /* read word at location addr. */
54 case PTRACE_PEEKTEXT: /* read word at location addr. */ 46 case PTRACE_PEEKTEXT:
55 case PTRACE_PEEKDATA: 47 case PTRACE_PEEKDATA:
56 ret = generic_ptrace_peekdata(child, addr, data); 48 ret = generic_ptrace_peekdata(child, addr, data);
57 break; 49 break;
58 50
59 /* read the word at location addr in the USER area. */ 51 /* read the word at location addr in the USER area. */
60 case PTRACE_PEEKUSR: 52 case PTRACE_PEEKUSR:
61 ret = peek_user(child, addr, data); 53 ret = peek_user(child, addr, data);
62 break; 54 break;
63 55
64 /* when I and D space are separate, this will have to be fixed. */ 56 /* write the word at location addr. */
65 case PTRACE_POKETEXT: /* write the word at location addr. */ 57 case PTRACE_POKETEXT:
66 case PTRACE_POKEDATA: 58 case PTRACE_POKEDATA:
67 ret = generic_ptrace_pokedata(child, addr, data); 59 ret = generic_ptrace_pokedata(child, addr, data);
68 break; 60 break;
69 61
70 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ 62 /* write the word at location addr in the USER area */
71 ret = poke_user(child, addr, data); 63 case PTRACE_POKEUSR:
72 break; 64 ret = poke_user(child, addr, data);
65 break;
73 66
74 case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ 67 /* continue and stop at next (return from) syscall */
75 case PTRACE_CONT: { /* restart after signal. */ 68 case PTRACE_SYSCALL:
69 /* restart after signal. */
70 case PTRACE_CONT: {
76 ret = -EIO; 71 ret = -EIO;
77 if (!valid_signal(data)) 72 if (!valid_signal(data))
78 break; 73 break;
79 74
80 set_singlestepping(child, 0); 75 set_singlestepping(child, 0);
81 if (request == PTRACE_SYSCALL) { 76 if (request == PTRACE_SYSCALL)
82 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); 77 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
83 } 78 else clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
84 else {
85 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
86 }
87 child->exit_code = data; 79 child->exit_code = data;
88 wake_up_process(child); 80 wake_up_process(child);
89 ret = 0; 81 ret = 0;
@@ -91,8 +83,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
91 } 83 }
92 84
93/* 85/*
94 * make the child exit. Best I can do is send it a sigkill. 86 * make the child exit. Best I can do is send it a sigkill.
95 * perhaps it should be put in the status that it wants to 87 * perhaps it should be put in the status that it wants to
96 * exit. 88 * exit.
97 */ 89 */
98 case PTRACE_KILL: { 90 case PTRACE_KILL: {
@@ -100,7 +92,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
100 if (child->exit_state == EXIT_ZOMBIE) /* already dead */ 92 if (child->exit_state == EXIT_ZOMBIE) /* already dead */
101 break; 93 break;
102 94
103 set_singlestepping(child, 0); 95 set_singlestepping(child, 0);
104 child->exit_code = SIGKILL; 96 child->exit_code = SIGKILL;
105 wake_up_process(child); 97 wake_up_process(child);
106 break; 98 break;
@@ -111,7 +103,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
111 if (!valid_signal(data)) 103 if (!valid_signal(data))
112 break; 104 break;
113 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); 105 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
114 set_singlestepping(child, 1); 106 set_singlestepping(child, 1);
115 child->exit_code = data; 107 child->exit_code = data;
116 /* give it a chance to run. */ 108 /* give it a chance to run. */
117 wake_up_process(child); 109 wake_up_process(child);
@@ -180,13 +172,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
180 break; 172 break;
181 173
182 case PTRACE_FAULTINFO: { 174 case PTRACE_FAULTINFO: {
183 /* Take the info from thread->arch->faultinfo, 175 /*
176 * Take the info from thread->arch->faultinfo,
184 * but transfer max. sizeof(struct ptrace_faultinfo). 177 * but transfer max. sizeof(struct ptrace_faultinfo).
185 * On i386, ptrace_faultinfo is smaller! 178 * On i386, ptrace_faultinfo is smaller!
186 */ 179 */
187 ret = copy_to_user(p, &child->thread.arch.faultinfo, 180 ret = copy_to_user(p, &child->thread.arch.faultinfo,
188 sizeof(struct ptrace_faultinfo)); 181 sizeof(struct ptrace_faultinfo));
189 if(ret) 182 if (ret)
190 break; 183 break;
191 break; 184 break;
192 } 185 }
@@ -195,12 +188,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
195 case PTRACE_LDT: { 188 case PTRACE_LDT: {
196 struct ptrace_ldt ldt; 189 struct ptrace_ldt ldt;
197 190
198 if(copy_from_user(&ldt, p, sizeof(ldt))){ 191 if (copy_from_user(&ldt, p, sizeof(ldt))) {
199 ret = -EIO; 192 ret = -EIO;
200 break; 193 break;
201 } 194 }
202 195
203 /* This one is confusing, so just punt and return -EIO for 196 /*
197 * This one is confusing, so just punt and return -EIO for
204 * now 198 * now
205 */ 199 */
206 ret = -EIO; 200 ret = -EIO;
@@ -212,7 +206,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
212 struct mm_struct *old = child->mm; 206 struct mm_struct *old = child->mm;
213 struct mm_struct *new = proc_mm_get_mm(data); 207 struct mm_struct *new = proc_mm_get_mm(data);
214 208
215 if(IS_ERR(new)){ 209 if (IS_ERR(new)) {
216 ret = PTR_ERR(new); 210 ret = PTR_ERR(new);
217 break; 211 break;
218 } 212 }
@@ -226,10 +220,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
226 } 220 }
227#endif 221#endif
228#ifdef PTRACE_ARCH_PRCTL 222#ifdef PTRACE_ARCH_PRCTL
229 case PTRACE_ARCH_PRCTL: 223 case PTRACE_ARCH_PRCTL:
230 /* XXX Calls ptrace on the host - needs some SMP thinking */ 224 /* XXX Calls ptrace on the host - needs some SMP thinking */
231 ret = arch_prctl(child, data, (void *) addr); 225 ret = arch_prctl(child, data, (void *) addr);
232 break; 226 break;
233#endif 227#endif
234 default: 228 default:
235 ret = ptrace_request(child, request, addr, data); 229 ret = ptrace_request(child, request, addr, data);
@@ -255,7 +249,8 @@ void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs,
255 force_sig_info(SIGTRAP, &info, tsk); 249 force_sig_info(SIGTRAP, &info, tsk);
256} 250}
257 251
258/* XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and 252/*
253 * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and
259 * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check 254 * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check
260 */ 255 */
261void syscall_trace(struct uml_pt_regs *regs, int entryexit) 256void syscall_trace(struct uml_pt_regs *regs, int entryexit)
@@ -272,7 +267,7 @@ void syscall_trace(struct uml_pt_regs *regs, int entryexit)
272 UPT_SYSCALL_ARG3(regs), 267 UPT_SYSCALL_ARG3(regs),
273 UPT_SYSCALL_ARG4(regs)); 268 UPT_SYSCALL_ARG4(regs));
274 else audit_syscall_exit(AUDITSC_RESULT(UPT_SYSCALL_RET(regs)), 269 else audit_syscall_exit(AUDITSC_RESULT(UPT_SYSCALL_RET(regs)),
275 UPT_SYSCALL_RET(regs)); 270 UPT_SYSCALL_RET(regs));
276 } 271 }
277 272
278 /* Fake a debug trap */ 273 /* Fake a debug trap */
@@ -285,15 +280,18 @@ void syscall_trace(struct uml_pt_regs *regs, int entryexit)
285 if (!(current->ptrace & PT_PTRACED)) 280 if (!(current->ptrace & PT_PTRACED))
286 return; 281 return;
287 282
288 /* the 0x80 provides a way for the tracing parent to distinguish 283 /*
289 between a syscall stop and SIGTRAP delivery */ 284 * the 0x80 provides a way for the tracing parent to distinguish
285 * between a syscall stop and SIGTRAP delivery
286 */
290 tracesysgood = (current->ptrace & PT_TRACESYSGOOD); 287 tracesysgood = (current->ptrace & PT_TRACESYSGOOD);
291 ptrace_notify(SIGTRAP | (tracesysgood ? 0x80 : 0)); 288 ptrace_notify(SIGTRAP | (tracesysgood ? 0x80 : 0));
292 289
293 if (entryexit) /* force do_signal() --> is_syscall() */ 290 if (entryexit) /* force do_signal() --> is_syscall() */
294 set_thread_flag(TIF_SIGPENDING); 291 set_thread_flag(TIF_SIGPENDING);
295 292
296 /* this isn't the same as continuing with a signal, but it will do 293 /*
294 * this isn't the same as continuing with a signal, but it will do
297 * for normal use. strace only continues with a signal if the 295 * for normal use. strace only continues with a signal if the
298 * stopping signal is not SIGTRAP. -brl 296 * stopping signal is not SIGTRAP. -brl
299 */ 297 */
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index f3bd18bbf07f..9d8eea47a0fc 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -1,13 +1,9 @@
1/* 1/*
2 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/module.h"
7#include "linux/sched.h" 6#include "linux/sched.h"
8#include "asm/smp.h"
9#include "kern_util.h"
10#include "kern.h"
11#include "os.h" 7#include "os.h"
12#include "skas.h" 8#include "skas.h"
13 9
@@ -37,20 +33,20 @@ static void kill_off_processes(void)
37 33
38void uml_cleanup(void) 34void uml_cleanup(void)
39{ 35{
40 kmalloc_ok = 0; 36 kmalloc_ok = 0;
41 do_uml_exitcalls(); 37 do_uml_exitcalls();
42 kill_off_processes(); 38 kill_off_processes();
43} 39}
44 40
45void machine_restart(char * __unused) 41void machine_restart(char * __unused)
46{ 42{
47 uml_cleanup(); 43 uml_cleanup();
48 reboot_skas(); 44 reboot_skas();
49} 45}
50 46
51void machine_power_off(void) 47void machine_power_off(void)
52{ 48{
53 uml_cleanup(); 49 uml_cleanup();
54 halt_skas(); 50 halt_skas();
55} 51}
56 52
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index 4dab7e417ba9..19cb97733937 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -1,27 +1,16 @@
1/* 1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/stddef.h"
7#include "linux/sys.h"
8#include "linux/sched.h"
9#include "linux/wait.h"
10#include "linux/kernel.h"
11#include "linux/smp_lock.h"
12#include "linux/module.h" 6#include "linux/module.h"
13#include "linux/slab.h"
14#include "linux/tty.h"
15#include "linux/binfmts.h"
16#include "linux/ptrace.h" 7#include "linux/ptrace.h"
8#include "linux/sched.h"
9#include "asm/siginfo.h"
17#include "asm/signal.h" 10#include "asm/signal.h"
18#include "asm/uaccess.h"
19#include "asm/unistd.h" 11#include "asm/unistd.h"
20#include "asm/ucontext.h"
21#include "kern_util.h"
22#include "signal_kern.h"
23#include "kern.h"
24#include "frame_kern.h" 12#include "frame_kern.h"
13#include "kern_util.h"
25#include "sigcontext.h" 14#include "sigcontext.h"
26 15
27EXPORT_SYMBOL(block_signals); 16EXPORT_SYMBOL(block_signals);
@@ -45,9 +34,9 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
45 current_thread_info()->restart_block.fn = do_no_restart_syscall; 34 current_thread_info()->restart_block.fn = do_no_restart_syscall;
46 35
47 /* Did we come from a system call? */ 36 /* Did we come from a system call? */
48 if(PT_REGS_SYSCALL_NR(regs) >= 0){ 37 if (PT_REGS_SYSCALL_NR(regs) >= 0) {
49 /* If so, check system call restarting.. */ 38 /* If so, check system call restarting.. */
50 switch(PT_REGS_SYSCALL_RET(regs)){ 39 switch(PT_REGS_SYSCALL_RET(regs)) {
51 case -ERESTART_RESTARTBLOCK: 40 case -ERESTART_RESTARTBLOCK:
52 case -ERESTARTNOHAND: 41 case -ERESTARTNOHAND:
53 PT_REGS_SYSCALL_RET(regs) = -EINTR; 42 PT_REGS_SYSCALL_RET(regs) = -EINTR;
@@ -67,17 +56,17 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
67 } 56 }
68 57
69 sp = PT_REGS_SP(regs); 58 sp = PT_REGS_SP(regs);
70 if((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0)) 59 if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0))
71 sp = current->sas_ss_sp + current->sas_ss_size; 60 sp = current->sas_ss_sp + current->sas_ss_size;
72 61
73#ifdef CONFIG_ARCH_HAS_SC_SIGNALS 62#ifdef CONFIG_ARCH_HAS_SC_SIGNALS
74 if(!(ka->sa.sa_flags & SA_SIGINFO)) 63 if (!(ka->sa.sa_flags & SA_SIGINFO))
75 err = setup_signal_stack_sc(sp, signr, ka, regs, oldset); 64 err = setup_signal_stack_sc(sp, signr, ka, regs, oldset);
76 else 65 else
77#endif 66#endif
78 err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset); 67 err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset);
79 68
80 if(err){ 69 if (err) {
81 spin_lock_irq(&current->sighand->siglock); 70 spin_lock_irq(&current->sighand->siglock);
82 current->blocked = *oldset; 71 current->blocked = *oldset;
83 recalc_sigpending(); 72 recalc_sigpending();
@@ -87,7 +76,7 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
87 spin_lock_irq(&current->sighand->siglock); 76 spin_lock_irq(&current->sighand->siglock);
88 sigorsets(&current->blocked, &current->blocked, 77 sigorsets(&current->blocked, &current->blocked,
89 &ka->sa.sa_mask); 78 &ka->sa.sa_mask);
90 if(!(ka->sa.sa_flags & SA_NODEFER)) 79 if (!(ka->sa.sa_flags & SA_NODEFER))
91 sigaddset(&current->blocked, signr); 80 sigaddset(&current->blocked, signr);
92 recalc_sigpending(); 81 recalc_sigpending();
93 spin_unlock_irq(&current->sighand->siglock); 82 spin_unlock_irq(&current->sighand->siglock);
@@ -108,14 +97,16 @@ static int kern_do_signal(struct pt_regs *regs)
108 else 97 else
109 oldset = &current->blocked; 98 oldset = &current->blocked;
110 99
111 while((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0){ 100 while ((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0) {
112 handled_sig = 1; 101 handled_sig = 1;
113 /* Whee! Actually deliver the signal. */ 102 /* Whee! Actually deliver the signal. */
114 if(!handle_signal(regs, sig, &ka_copy, &info, oldset)){ 103 if (!handle_signal(regs, sig, &ka_copy, &info, oldset)) {
115 /* a signal was successfully delivered; the saved 104 /*
105 * a signal was successfully delivered; the saved
116 * sigmask will have been stored in the signal frame, 106 * sigmask will have been stored in the signal frame,
117 * and will be restored by sigreturn, so we can simply 107 * and will be restored by sigreturn, so we can simply
118 * clear the TIF_RESTORE_SIGMASK flag */ 108 * clear the TIF_RESTORE_SIGMASK flag
109 */
119 if (test_thread_flag(TIF_RESTORE_SIGMASK)) 110 if (test_thread_flag(TIF_RESTORE_SIGMASK))
120 clear_thread_flag(TIF_RESTORE_SIGMASK); 111 clear_thread_flag(TIF_RESTORE_SIGMASK);
121 break; 112 break;
@@ -123,9 +114,9 @@ static int kern_do_signal(struct pt_regs *regs)
123 } 114 }
124 115
125 /* Did we come from a system call? */ 116 /* Did we come from a system call? */
126 if(!handled_sig && (PT_REGS_SYSCALL_NR(regs) >= 0)){ 117 if (!handled_sig && (PT_REGS_SYSCALL_NR(regs) >= 0)) {
127 /* Restart the system call - no handlers present */ 118 /* Restart the system call - no handlers present */
128 switch(PT_REGS_SYSCALL_RET(regs)){ 119 switch(PT_REGS_SYSCALL_RET(regs)) {
129 case -ERESTARTNOHAND: 120 case -ERESTARTNOHAND:
130 case -ERESTARTSYS: 121 case -ERESTARTSYS:
131 case -ERESTARTNOINTR: 122 case -ERESTARTNOINTR:
@@ -136,22 +127,25 @@ static int kern_do_signal(struct pt_regs *regs)
136 PT_REGS_ORIG_SYSCALL(regs) = __NR_restart_syscall; 127 PT_REGS_ORIG_SYSCALL(regs) = __NR_restart_syscall;
137 PT_REGS_RESTART_SYSCALL(regs); 128 PT_REGS_RESTART_SYSCALL(regs);
138 break; 129 break;
139 } 130 }
140 } 131 }
141 132
142 /* This closes a way to execute a system call on the host. If 133 /*
134 * This closes a way to execute a system call on the host. If
143 * you set a breakpoint on a system call instruction and singlestep 135 * you set a breakpoint on a system call instruction and singlestep
144 * from it, the tracing thread used to PTRACE_SINGLESTEP the process 136 * from it, the tracing thread used to PTRACE_SINGLESTEP the process
145 * rather than PTRACE_SYSCALL it, allowing the system call to execute 137 * rather than PTRACE_SYSCALL it, allowing the system call to execute
146 * on the host. The tracing thread will check this flag and 138 * on the host. The tracing thread will check this flag and
147 * PTRACE_SYSCALL if necessary. 139 * PTRACE_SYSCALL if necessary.
148 */ 140 */
149 if(current->ptrace & PT_DTRACE) 141 if (current->ptrace & PT_DTRACE)
150 current->thread.singlestep_syscall = 142 current->thread.singlestep_syscall =
151 is_syscall(PT_REGS_IP(&current->thread.regs)); 143 is_syscall(PT_REGS_IP(&current->thread.regs));
152 144
153 /* if there's no signal to deliver, we just put the saved sigmask 145 /*
154 * back */ 146 * if there's no signal to deliver, we just put the saved sigmask
147 * back
148 */
155 if (!handled_sig && test_thread_flag(TIF_RESTORE_SIGMASK)) { 149 if (!handled_sig && test_thread_flag(TIF_RESTORE_SIGMASK)) {
156 clear_thread_flag(TIF_RESTORE_SIGMASK); 150 clear_thread_flag(TIF_RESTORE_SIGMASK);
157 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL); 151 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index b2823cdd783e..0b76d8869c94 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -1,5 +1,5 @@
1# 1#
2# Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com) 2# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3# Licensed under the GPL 3# Licensed under the GPL
4# 4#
5 5
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 902d74138952..c5475ecd9fd4 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -1,20 +1,12 @@
1/* 1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/sched.h"
7#include "linux/list.h"
8#include "linux/spinlock.h"
9#include "linux/slab.h"
10#include "linux/errno.h"
11#include "linux/mm.h" 6#include "linux/mm.h"
12#include "asm/current.h" 7#include "linux/sched.h"
13#include "asm/segment.h"
14#include "asm/mmu.h"
15#include "asm/pgalloc.h" 8#include "asm/pgalloc.h"
16#include "asm/pgtable.h" 9#include "asm/pgtable.h"
17#include "asm/ldt.h"
18#include "os.h" 10#include "os.h"
19#include "skas.h" 11#include "skas.h"
20 12
@@ -41,10 +33,11 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
41 if (!pte) 33 if (!pte)
42 goto out_pte; 34 goto out_pte;
43 35
44 /* There's an interaction between the skas0 stub pages, stack 36 /*
37 * There's an interaction between the skas0 stub pages, stack
45 * randomization, and the BUG at the end of exit_mmap. exit_mmap 38 * randomization, and the BUG at the end of exit_mmap. exit_mmap
46 * checks that the number of page tables freed is the same as had 39 * checks that the number of page tables freed is the same as had
47 * been allocated. If the stack is on the last page table page, 40 * been allocated. If the stack is on the last page table page,
48 * then the stack pte page will be freed, and if not, it won't. To 41 * then the stack pte page will be freed, and if not, it won't. To
49 * avoid having to know where the stack is, or if the process mapped 42 * avoid having to know where the stack is, or if the process mapped
50 * something at the top of its address space for some other reason, 43 * something at the top of its address space for some other reason,
@@ -54,36 +47,37 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
54 * destroy_context_skas. 47 * destroy_context_skas.
55 */ 48 */
56 49
57 mm->context.skas.last_page_table = pmd_page_vaddr(*pmd); 50 mm->context.skas.last_page_table = pmd_page_vaddr(*pmd);
58#ifdef CONFIG_3_LEVEL_PGTABLES 51#ifdef CONFIG_3_LEVEL_PGTABLES
59 mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud)); 52 mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud));
60#endif 53#endif
61 54
62 *pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT)); 55 *pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
63 *pte = pte_mkread(*pte); 56 *pte = pte_mkread(*pte);
64 return(0); 57 return 0;
65 58
66 out_pmd: 59 out_pmd:
67 pud_free(pud); 60 pud_free(pud);
68 out_pte: 61 out_pte:
69 pmd_free(pmd); 62 pmd_free(pmd);
70 out: 63 out:
71 return(-ENOMEM); 64 return -ENOMEM;
72} 65}
73 66
74int init_new_context(struct task_struct *task, struct mm_struct *mm) 67int init_new_context(struct task_struct *task, struct mm_struct *mm)
75{ 68{
76 struct mmu_context_skas *from_mm = NULL; 69 struct mmu_context_skas *from_mm = NULL;
77 struct mmu_context_skas *to_mm = &mm->context.skas; 70 struct mmu_context_skas *to_mm = &mm->context.skas;
78 unsigned long stack = 0; 71 unsigned long stack = 0;
79 int ret = -ENOMEM; 72 int ret = -ENOMEM;
80 73
81 if(skas_needs_stub){ 74 if (skas_needs_stub) {
82 stack = get_zeroed_page(GFP_KERNEL); 75 stack = get_zeroed_page(GFP_KERNEL);
83 if(stack == 0) 76 if (stack == 0)
84 goto out; 77 goto out;
85 78
86 /* This zeros the entry that pgd_alloc didn't, needed since 79 /*
80 * This zeros the entry that pgd_alloc didn't, needed since
87 * we are about to reinitialize it, and want mm.nr_ptes to 81 * we are about to reinitialize it, and want mm.nr_ptes to
88 * be accurate. 82 * be accurate.
89 */ 83 */
@@ -91,39 +85,39 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
91 85
92 ret = init_stub_pte(mm, CONFIG_STUB_CODE, 86 ret = init_stub_pte(mm, CONFIG_STUB_CODE,
93 (unsigned long) &__syscall_stub_start); 87 (unsigned long) &__syscall_stub_start);
94 if(ret) 88 if (ret)
95 goto out_free; 89 goto out_free;
96 90
97 ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack); 91 ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack);
98 if(ret) 92 if (ret)
99 goto out_free; 93 goto out_free;
100 94
101 mm->nr_ptes--; 95 mm->nr_ptes--;
102 } 96 }
103 97
104 to_mm->id.stack = stack; 98 to_mm->id.stack = stack;
105 if(current->mm != NULL && current->mm != &init_mm) 99 if (current->mm != NULL && current->mm != &init_mm)
106 from_mm = &current->mm->context.skas; 100 from_mm = &current->mm->context.skas;
107 101
108 if(proc_mm){ 102 if (proc_mm) {
109 ret = new_mm(stack); 103 ret = new_mm(stack);
110 if(ret < 0){ 104 if (ret < 0) {
111 printk("init_new_context_skas - new_mm failed, " 105 printk(KERN_ERR "init_new_context_skas - "
112 "errno = %d\n", ret); 106 "new_mm failed, errno = %d\n", ret);
113 goto out_free; 107 goto out_free;
114 } 108 }
115 to_mm->id.u.mm_fd = ret; 109 to_mm->id.u.mm_fd = ret;
116 } 110 }
117 else { 111 else {
118 if(from_mm) 112 if (from_mm)
119 to_mm->id.u.pid = copy_context_skas0(stack, 113 to_mm->id.u.pid = copy_context_skas0(stack,
120 from_mm->id.u.pid); 114 from_mm->id.u.pid);
121 else to_mm->id.u.pid = start_userspace(stack); 115 else to_mm->id.u.pid = start_userspace(stack);
122 } 116 }
123 117
124 ret = init_new_ldt(to_mm, from_mm); 118 ret = init_new_ldt(to_mm, from_mm);
125 if(ret < 0){ 119 if (ret < 0) {
126 printk("init_new_context_skas - init_ldt" 120 printk(KERN_ERR "init_new_context_skas - init_ldt"
127 " failed, errno = %d\n", ret); 121 " failed, errno = %d\n", ret);
128 goto out_free; 122 goto out_free;
129 } 123 }
@@ -131,7 +125,7 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
131 return 0; 125 return 0;
132 126
133 out_free: 127 out_free:
134 if(to_mm->id.stack != 0) 128 if (to_mm->id.stack != 0)
135 free_page(to_mm->id.stack); 129 free_page(to_mm->id.stack);
136 out: 130 out:
137 return ret; 131 return ret;
@@ -141,12 +135,12 @@ void destroy_context(struct mm_struct *mm)
141{ 135{
142 struct mmu_context_skas *mmu = &mm->context.skas; 136 struct mmu_context_skas *mmu = &mm->context.skas;
143 137
144 if(proc_mm) 138 if (proc_mm)
145 os_close_file(mmu->id.u.mm_fd); 139 os_close_file(mmu->id.u.mm_fd);
146 else 140 else
147 os_kill_ptraced_process(mmu->id.u.pid, 1); 141 os_kill_ptraced_process(mmu->id.u.pid, 1);
148 142
149 if(!proc_mm || !ptrace_faultinfo){ 143 if (!proc_mm || !ptrace_faultinfo) {
150 free_page(mmu->id.stack); 144 free_page(mmu->id.stack);
151 pte_lock_deinit(virt_to_page(mmu->last_page_table)); 145 pte_lock_deinit(virt_to_page(mmu->last_page_table));
152 pte_free_kernel((pte_t *) mmu->last_page_table); 146 pte_free_kernel((pte_t *) mmu->last_page_table);
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index dabae62d52be..9ce1c49421f8 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -1,36 +1,23 @@
1/* 1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/sched.h"
7#include "linux/slab.h"
8#include "linux/ptrace.h"
9#include "linux/proc_fs.h"
10#include "linux/file.h"
11#include "linux/errno.h"
12#include "linux/init.h" 6#include "linux/init.h"
13#include "asm/uaccess.h" 7#include "linux/sched.h"
14#include "asm/atomic.h"
15#include "kern_util.h"
16#include "as-layout.h" 8#include "as-layout.h"
17#include "skas.h"
18#include "os.h" 9#include "os.h"
19#include "tlb.h" 10#include "skas.h"
20#include "kern.h"
21#include "registers.h"
22
23extern void schedule_tail(struct task_struct *prev);
24 11
25int new_mm(unsigned long stack) 12int new_mm(unsigned long stack)
26{ 13{
27 int fd; 14 int fd;
28 15
29 fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); 16 fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
30 if(fd < 0) 17 if (fd < 0)
31 return fd; 18 return fd;
32 19
33 if(skas_needs_stub) 20 if (skas_needs_stub)
34 map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); 21 map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
35 22
36 return fd; 23 return fd;
@@ -62,7 +49,7 @@ int __init start_uml(void)
62{ 49{
63 stack_protections((unsigned long) &cpu0_irqstack); 50 stack_protections((unsigned long) &cpu0_irqstack);
64 set_sigstack(cpu0_irqstack, THREAD_SIZE); 51 set_sigstack(cpu0_irqstack, THREAD_SIZE);
65 if(proc_mm) 52 if (proc_mm)
66 userspace_pid[0] = start_userspace(0); 53 userspace_pid[0] = start_userspace(0);
67 54
68 init_new_thread_signals(); 55 init_new_thread_signals();
@@ -75,7 +62,7 @@ int __init start_uml(void)
75 62
76unsigned long current_stub_stack(void) 63unsigned long current_stub_stack(void)
77{ 64{
78 if(current->mm == NULL) 65 if (current->mm == NULL)
79 return 0; 66 return 0;
80 67
81 return current->mm->context.skas.id.stack; 68 return current->mm->context.skas.id.stack;
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
index e183da633c89..8582c1331048 100644
--- a/arch/um/kernel/skas/syscall.c
+++ b/arch/um/kernel/skas/syscall.c
@@ -1,17 +1,13 @@
1/* 1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/sys.h" 6#include "linux/kernel.h"
7#include "linux/ptrace.h" 7#include "linux/ptrace.h"
8#include "asm/errno.h"
9#include "asm/unistd.h"
10#include "asm/ptrace.h"
11#include "asm/current.h"
12#include "sysdep/syscalls.h"
13#include "kern_util.h" 8#include "kern_util.h"
14#include "syscall.h" 9#include "sysdep/ptrace.h"
10#include "sysdep/syscalls.h"
15 11
16void handle_syscall(struct uml_pt_regs *r) 12void handle_syscall(struct uml_pt_regs *r)
17{ 13{
@@ -24,7 +20,8 @@ void handle_syscall(struct uml_pt_regs *r)
24 current->thread.nsyscalls++; 20 current->thread.nsyscalls++;
25 nsyscalls++; 21 nsyscalls++;
26 22
27 /* This should go in the declaration of syscall, but when I do that, 23 /*
24 * This should go in the declaration of syscall, but when I do that,
28 * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing 25 * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
29 * children at all, sometimes hanging when bash doesn't see the first 26 * children at all, sometimes hanging when bash doesn't see the first
30 * ls exit. 27 * ls exit.
@@ -33,7 +30,7 @@ void handle_syscall(struct uml_pt_regs *r)
33 * in case it's a compiler bug. 30 * in case it's a compiler bug.
34 */ 31 */
35 syscall = UPT_SYSCALL_NR(r); 32 syscall = UPT_SYSCALL_NR(r);
36 if((syscall >= NR_syscalls) || (syscall < 0)) 33 if ((syscall >= NR_syscalls) || (syscall < 0))
37 result = -ENOSYS; 34 result = -ENOSYS;
38 else result = EXECUTE_SYSCALL(syscall, regs); 35 else result = EXECUTE_SYSCALL(syscall, regs);
39 36
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index ebb29f5259a9..b9d92b2089ae 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -1,25 +1,17 @@
1/* 1/*
2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/sched.h"
7#include "linux/file.h" 6#include "linux/file.h"
8#include "linux/smp_lock.h"
9#include "linux/mm.h"
10#include "linux/fs.h" 7#include "linux/fs.h"
8#include "linux/mm.h"
9#include "linux/sched.h"
11#include "linux/utsname.h" 10#include "linux/utsname.h"
12#include "linux/msg.h" 11#include "asm/current.h"
13#include "linux/shm.h"
14#include "linux/sys.h"
15#include "linux/syscalls.h"
16#include "linux/unistd.h"
17#include "linux/slab.h"
18#include "linux/utime.h"
19#include "asm/mman.h" 12#include "asm/mman.h"
20#include "asm/uaccess.h" 13#include "asm/uaccess.h"
21#include "kern_util.h" 14#include "asm/unistd.h"
22#include "sysdep/syscalls.h"
23 15
24/* Unlocked, I don't care if this is a bit off */ 16/* Unlocked, I don't care if this is a bit off */
25int nsyscalls = 0; 17int nsyscalls = 0;
@@ -32,7 +24,7 @@ long sys_fork(void)
32 ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs), 24 ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
33 &current->thread.regs, 0, NULL, NULL); 25 &current->thread.regs, 0, NULL, NULL);
34 current->thread.forking = 0; 26 current->thread.forking = 0;
35 return(ret); 27 return ret;
36} 28}
37 29
38long sys_vfork(void) 30long sys_vfork(void)
@@ -44,7 +36,7 @@ long sys_vfork(void)
44 UPT_SP(&current->thread.regs.regs), 36 UPT_SP(&current->thread.regs.regs),
45 &current->thread.regs, 0, NULL, NULL); 37 &current->thread.regs, 0, NULL, NULL);
46 current->thread.forking = 0; 38 current->thread.forking = 0;
47 return(ret); 39 return ret;
48} 40}
49 41
50/* common code for old and new mmaps */ 42/* common code for old and new mmaps */
@@ -90,15 +82,15 @@ long old_mmap(unsigned long addr, unsigned long len,
90 */ 82 */
91long sys_pipe(unsigned long __user * fildes) 83long sys_pipe(unsigned long __user * fildes)
92{ 84{
93 int fd[2]; 85 int fd[2];
94 long error; 86 long error;
95 87
96 error = do_pipe(fd); 88 error = do_pipe(fd);
97 if (!error) { 89 if (!error) {
98 if (copy_to_user(fildes, fd, sizeof(fd))) 90 if (copy_to_user(fildes, fd, sizeof(fd)))
99 error = -EFAULT; 91 error = -EFAULT;
100 } 92 }
101 return error; 93 return error;
102} 94}
103 95
104 96
@@ -122,7 +114,7 @@ long sys_olduname(struct oldold_utsname __user * name)
122 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) 114 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
123 return -EFAULT; 115 return -EFAULT;
124 116
125 down_read(&uts_sem); 117 down_read(&uts_sem);
126 118
127 error = __copy_to_user(&name->sysname, &utsname()->sysname, 119 error = __copy_to_user(&name->sysname, &utsname()->sysname,
128 __OLD_UTS_LEN); 120 __OLD_UTS_LEN);
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 90e24e2dbeaa..4fc8c2586b70 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -1,28 +1,19 @@
1/* 1/*
2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/kernel.h"
7#include "linux/module.h"
8#include "linux/unistd.h"
9#include "linux/stddef.h"
10#include "linux/spinlock.h"
11#include "linux/time.h"
12#include "linux/sched.h"
13#include "linux/interrupt.h" 6#include "linux/interrupt.h"
14#include "linux/init.h" 7#include "linux/jiffies.h"
15#include "linux/delay.h" 8#include "linux/threads.h"
16#include "linux/hrtimer.h"
17#include "asm/irq.h" 9#include "asm/irq.h"
18#include "asm/param.h" 10#include "asm/param.h"
19#include "asm/current.h"
20#include "kern_util.h" 11#include "kern_util.h"
21#include "os.h" 12#include "os.h"
22 13
23int hz(void) 14int hz(void)
24{ 15{
25 return(HZ); 16 return HZ;
26} 17}
27 18
28/* 19/*
@@ -43,7 +34,7 @@ void timer_irq(struct uml_pt_regs *regs)
43 unsigned long long ticks = 0; 34 unsigned long long ticks = 0;
44#ifdef CONFIG_UML_REAL_TIME_CLOCK 35#ifdef CONFIG_UML_REAL_TIME_CLOCK
45 int c = cpu(); 36 int c = cpu();
46 if(prev_nsecs[c]){ 37 if (prev_nsecs[c]) {
47 /* We've had 1 tick */ 38 /* We've had 1 tick */
48 unsigned long long nsecs = os_nsecs(); 39 unsigned long long nsecs = os_nsecs();
49 40
@@ -51,7 +42,7 @@ void timer_irq(struct uml_pt_regs *regs)
51 prev_nsecs[c] = nsecs; 42 prev_nsecs[c] = nsecs;
52 43
53 /* Protect against the host clock being set backwards */ 44 /* Protect against the host clock being set backwards */
54 if(delta[c] < 0) 45 if (delta[c] < 0)
55 delta[c] = 0; 46 delta[c] = 0;
56 47
57 ticks += (delta[c] * HZ) / BILLION; 48 ticks += (delta[c] * HZ) / BILLION;
@@ -61,7 +52,7 @@ void timer_irq(struct uml_pt_regs *regs)
61#else 52#else
62 ticks = 1; 53 ticks = 1;
63#endif 54#endif
64 while(ticks > 0){ 55 while (ticks > 0) {
65 do_IRQ(TIMER_IRQ, regs); 56 do_IRQ(TIMER_IRQ, regs);
66 ticks--; 57 ticks--;
67 } 58 }
@@ -112,12 +103,12 @@ static void register_timer(void)
112 int err; 103 int err;
113 104
114 err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL); 105 err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
115 if(err != 0) 106 if (err != 0)
116 printk(KERN_ERR "register_timer : request_irq failed - " 107 printk(KERN_ERR "register_timer : request_irq failed - "
117 "errno = %d\n", -err); 108 "errno = %d\n", -err);
118 109
119 err = set_interval(1); 110 err = set_interval(1);
120 if(err != 0) 111 if (err != 0)
121 printk(KERN_ERR "register_timer : set_interval failed - " 112 printk(KERN_ERR "register_timer : set_interval failed - "
122 "errno = %d\n", -err); 113 "errno = %d\n", -err);
123} 114}
@@ -144,7 +135,8 @@ void do_gettimeofday(struct timeval *tv)
144 xtime.tv_nsec; 135 xtime.tv_nsec;
145#endif 136#endif
146 tv->tv_sec = nsecs / NSEC_PER_SEC; 137 tv->tv_sec = nsecs / NSEC_PER_SEC;
147 /* Careful about calculations here - this was originally done as 138 /*
139 * Careful about calculations here - this was originally done as
148 * (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC 140 * (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC
149 * which gave bogus (> 1000000) values. Dunno why, suspect gcc 141 * which gave bogus (> 1000000) values. Dunno why, suspect gcc
150 * (4.0.0) miscompiled it, or there's a subtle 64/32-bit conversion 142 * (4.0.0) miscompiled it, or there's a subtle 64/32-bit conversion
@@ -176,7 +168,7 @@ int do_settimeofday(struct timespec *tv)
176 168
177void timer_handler(int sig, struct uml_pt_regs *regs) 169void timer_handler(int sig, struct uml_pt_regs *regs)
178{ 170{
179 if(current_thread->cpu == 0) 171 if (current_thread->cpu == 0)
180 timer_irq(regs); 172 timer_irq(regs);
181 local_irq_disable(); 173 local_irq_disable();
182 irq_enter(); 174 irq_enter();
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 12b8c637527d..849922fcfb60 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -1,19 +1,16 @@
1/* 1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/mm.h" 6#include "linux/mm.h"
7#include "asm/page.h"
8#include "asm/pgalloc.h"
9#include "asm/pgtable.h" 7#include "asm/pgtable.h"
10#include "asm/tlbflush.h" 8#include "asm/tlbflush.h"
11#include "as-layout.h" 9#include "as-layout.h"
12#include "tlb.h"
13#include "mem.h"
14#include "mem_user.h" 10#include "mem_user.h"
15#include "os.h" 11#include "os.h"
16#include "skas.h" 12#include "skas.h"
13#include "tlb.h"
17 14
18static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, 15static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
19 unsigned int prot, struct host_vm_op *ops, int *index, 16 unsigned int prot, struct host_vm_op *ops, int *index,
@@ -26,18 +23,18 @@ static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
26 int fd, ret = 0; 23 int fd, ret = 0;
27 24
28 fd = phys_mapping(phys, &offset); 25 fd = phys_mapping(phys, &offset);
29 if(*index != -1){ 26 if (*index != -1) {
30 last = &ops[*index]; 27 last = &ops[*index];
31 if((last->type == MMAP) && 28 if ((last->type == MMAP) &&
32 (last->u.mmap.addr + last->u.mmap.len == virt) && 29 (last->u.mmap.addr + last->u.mmap.len == virt) &&
33 (last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) && 30 (last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) &&
34 (last->u.mmap.offset + last->u.mmap.len == offset)){ 31 (last->u.mmap.offset + last->u.mmap.len == offset)) {
35 last->u.mmap.len += len; 32 last->u.mmap.len += len;
36 return 0; 33 return 0;
37 } 34 }
38 } 35 }
39 36
40 if(*index == last_filled){ 37 if (*index == last_filled) {
41 ret = (*do_ops)(mmu, ops, last_filled, 0, flush); 38 ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
42 *index = -1; 39 *index = -1;
43 } 40 }
@@ -62,16 +59,16 @@ static int add_munmap(unsigned long addr, unsigned long len,
62 struct host_vm_op *last; 59 struct host_vm_op *last;
63 int ret = 0; 60 int ret = 0;
64 61
65 if(*index != -1){ 62 if (*index != -1) {
66 last = &ops[*index]; 63 last = &ops[*index];
67 if((last->type == MUNMAP) && 64 if ((last->type == MUNMAP) &&
68 (last->u.munmap.addr + last->u.mmap.len == addr)){ 65 (last->u.munmap.addr + last->u.mmap.len == addr)) {
69 last->u.munmap.len += len; 66 last->u.munmap.len += len;
70 return 0; 67 return 0;
71 } 68 }
72 } 69 }
73 70
74 if(*index == last_filled){ 71 if (*index == last_filled) {
75 ret = (*do_ops)(mmu, ops, last_filled, 0, flush); 72 ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
76 *index = -1; 73 *index = -1;
77 } 74 }
@@ -92,17 +89,17 @@ static int add_mprotect(unsigned long addr, unsigned long len,
92 struct host_vm_op *last; 89 struct host_vm_op *last;
93 int ret = 0; 90 int ret = 0;
94 91
95 if(*index != -1){ 92 if (*index != -1) {
96 last = &ops[*index]; 93 last = &ops[*index];
97 if((last->type == MPROTECT) && 94 if ((last->type == MPROTECT) &&
98 (last->u.mprotect.addr + last->u.mprotect.len == addr) && 95 (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
99 (last->u.mprotect.prot == prot)){ 96 (last->u.mprotect.prot == prot)) {
100 last->u.mprotect.len += len; 97 last->u.mprotect.len += len;
101 return 0; 98 return 0;
102 } 99 }
103 } 100 }
104 101
105 if(*index == last_filled){ 102 if (*index == last_filled) {
106 ret = (*do_ops)(mmu, ops, last_filled, 0, flush); 103 ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
107 *index = -1; 104 *index = -1;
108 } 105 }
@@ -141,15 +138,15 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
141 } 138 }
142 prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | 139 prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
143 (x ? UM_PROT_EXEC : 0)); 140 (x ? UM_PROT_EXEC : 0));
144 if(force || pte_newpage(*pte)){ 141 if (force || pte_newpage(*pte)) {
145 if(pte_present(*pte)) 142 if (pte_present(*pte))
146 ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK, 143 ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
147 PAGE_SIZE, prot, ops, op_index, 144 PAGE_SIZE, prot, ops, op_index,
148 last_op, mmu, flush, do_ops); 145 last_op, mmu, flush, do_ops);
149 else ret = add_munmap(addr, PAGE_SIZE, ops, op_index, 146 else ret = add_munmap(addr, PAGE_SIZE, ops, op_index,
150 last_op, mmu, flush, do_ops); 147 last_op, mmu, flush, do_ops);
151 } 148 }
152 else if(pte_newprot(*pte)) 149 else if (pte_newprot(*pte))
153 ret = add_mprotect(addr, PAGE_SIZE, prot, ops, op_index, 150 ret = add_mprotect(addr, PAGE_SIZE, prot, ops, op_index,
154 last_op, mmu, flush, do_ops); 151 last_op, mmu, flush, do_ops);
155 *pte = pte_mkuptodate(*pte); 152 *pte = pte_mkuptodate(*pte);
@@ -172,8 +169,8 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr,
172 pmd = pmd_offset(pud, addr); 169 pmd = pmd_offset(pud, addr);
173 do { 170 do {
174 next = pmd_addr_end(addr, end); 171 next = pmd_addr_end(addr, end);
175 if(!pmd_present(*pmd)){ 172 if (!pmd_present(*pmd)) {
176 if(force || pmd_newpage(*pmd)){ 173 if (force || pmd_newpage(*pmd)) {
177 ret = add_munmap(addr, next - addr, ops, 174 ret = add_munmap(addr, next - addr, ops,
178 op_index, last_op, mmu, 175 op_index, last_op, mmu,
179 flush, do_ops); 176 flush, do_ops);
@@ -202,8 +199,8 @@ static inline int update_pud_range(pgd_t *pgd, unsigned long addr,
202 pud = pud_offset(pgd, addr); 199 pud = pud_offset(pgd, addr);
203 do { 200 do {
204 next = pud_addr_end(addr, end); 201 next = pud_addr_end(addr, end);
205 if(!pud_present(*pud)){ 202 if (!pud_present(*pud)) {
206 if(force || pud_newpage(*pud)){ 203 if (force || pud_newpage(*pud)) {
207 ret = add_munmap(addr, next - addr, ops, 204 ret = add_munmap(addr, next - addr, ops,
208 op_index, last_op, mmu, 205 op_index, last_op, mmu,
209 flush, do_ops); 206 flush, do_ops);
@@ -233,8 +230,8 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
233 pgd = pgd_offset(mm, addr); 230 pgd = pgd_offset(mm, addr);
234 do { 231 do {
235 next = pgd_addr_end(addr, end_addr); 232 next = pgd_addr_end(addr, end_addr);
236 if(!pgd_present(*pgd)){ 233 if (!pgd_present(*pgd)) {
237 if (force || pgd_newpage(*pgd)){ 234 if (force || pgd_newpage(*pgd)) {
238 ret = add_munmap(addr, next - addr, ops, 235 ret = add_munmap(addr, next - addr, ops,
239 &op_index, last_op, mmu, 236 &op_index, last_op, mmu,
240 &flush, do_ops); 237 &flush, do_ops);
@@ -246,12 +243,13 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
246 do_ops); 243 do_ops);
247 } while (pgd++, addr = next, ((addr != end_addr) && !ret)); 244 } while (pgd++, addr = next, ((addr != end_addr) && !ret));
248 245
249 if(!ret) 246 if (!ret)
250 ret = (*do_ops)(mmu, ops, op_index, 1, &flush); 247 ret = (*do_ops)(mmu, ops, op_index, 1, &flush);
251 248
252 /* This is not an else because ret is modified above */ 249 /* This is not an else because ret is modified above */
253 if(ret) { 250 if (ret) {
254 printk("fix_range_common: failed, killing current process\n"); 251 printk(KERN_ERR "fix_range_common: failed, killing current "
252 "process\n");
255 force_sig(SIGKILL, current); 253 force_sig(SIGKILL, current);
256 } 254 }
257} 255}
@@ -267,17 +265,17 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
267 int updated = 0, err; 265 int updated = 0, err;
268 266
269 mm = &init_mm; 267 mm = &init_mm;
270 for(addr = start; addr < end;){ 268 for (addr = start; addr < end;) {
271 pgd = pgd_offset(mm, addr); 269 pgd = pgd_offset(mm, addr);
272 if(!pgd_present(*pgd)){ 270 if (!pgd_present(*pgd)) {
273 last = ADD_ROUND(addr, PGDIR_SIZE); 271 last = ADD_ROUND(addr, PGDIR_SIZE);
274 if(last > end) 272 if (last > end)
275 last = end; 273 last = end;
276 if(pgd_newpage(*pgd)){ 274 if (pgd_newpage(*pgd)) {
277 updated = 1; 275 updated = 1;
278 err = os_unmap_memory((void *) addr, 276 err = os_unmap_memory((void *) addr,
279 last - addr); 277 last - addr);
280 if(err < 0) 278 if (err < 0)
281 panic("munmap failed, errno = %d\n", 279 panic("munmap failed, errno = %d\n",
282 -err); 280 -err);
283 } 281 }
@@ -286,15 +284,15 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
286 } 284 }
287 285
288 pud = pud_offset(pgd, addr); 286 pud = pud_offset(pgd, addr);
289 if(!pud_present(*pud)){ 287 if (!pud_present(*pud)) {
290 last = ADD_ROUND(addr, PUD_SIZE); 288 last = ADD_ROUND(addr, PUD_SIZE);
291 if(last > end) 289 if (last > end)
292 last = end; 290 last = end;
293 if(pud_newpage(*pud)){ 291 if (pud_newpage(*pud)) {
294 updated = 1; 292 updated = 1;
295 err = os_unmap_memory((void *) addr, 293 err = os_unmap_memory((void *) addr,
296 last - addr); 294 last - addr);
297 if(err < 0) 295 if (err < 0)
298 panic("munmap failed, errno = %d\n", 296 panic("munmap failed, errno = %d\n",
299 -err); 297 -err);
300 } 298 }
@@ -303,15 +301,15 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
303 } 301 }
304 302
305 pmd = pmd_offset(pud, addr); 303 pmd = pmd_offset(pud, addr);
306 if(!pmd_present(*pmd)){ 304 if (!pmd_present(*pmd)) {
307 last = ADD_ROUND(addr, PMD_SIZE); 305 last = ADD_ROUND(addr, PMD_SIZE);
308 if(last > end) 306 if (last > end)
309 last = end; 307 last = end;
310 if(pmd_newpage(*pmd)){ 308 if (pmd_newpage(*pmd)) {
311 updated = 1; 309 updated = 1;
312 err = os_unmap_memory((void *) addr, 310 err = os_unmap_memory((void *) addr,
313 last - addr); 311 last - addr);
314 if(err < 0) 312 if (err < 0)
315 panic("munmap failed, errno = %d\n", 313 panic("munmap failed, errno = %d\n",
316 -err); 314 -err);
317 } 315 }
@@ -320,25 +318,25 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
320 } 318 }
321 319
322 pte = pte_offset_kernel(pmd, addr); 320 pte = pte_offset_kernel(pmd, addr);
323 if(!pte_present(*pte) || pte_newpage(*pte)){ 321 if (!pte_present(*pte) || pte_newpage(*pte)) {
324 updated = 1; 322 updated = 1;
325 err = os_unmap_memory((void *) addr, 323 err = os_unmap_memory((void *) addr,
326 PAGE_SIZE); 324 PAGE_SIZE);
327 if(err < 0) 325 if (err < 0)
328 panic("munmap failed, errno = %d\n", 326 panic("munmap failed, errno = %d\n",
329 -err); 327 -err);
330 if(pte_present(*pte)) 328 if (pte_present(*pte))
331 map_memory(addr, 329 map_memory(addr,
332 pte_val(*pte) & PAGE_MASK, 330 pte_val(*pte) & PAGE_MASK,
333 PAGE_SIZE, 1, 1, 1); 331 PAGE_SIZE, 1, 1, 1);
334 } 332 }
335 else if(pte_newprot(*pte)){ 333 else if (pte_newprot(*pte)) {
336 updated = 1; 334 updated = 1;
337 os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1); 335 os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
338 } 336 }
339 addr += PAGE_SIZE; 337 addr += PAGE_SIZE;
340 } 338 }
341 return(updated); 339 return updated;
342} 340}
343 341
344void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) 342void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
@@ -354,15 +352,15 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
354 352
355 address &= PAGE_MASK; 353 address &= PAGE_MASK;
356 pgd = pgd_offset(mm, address); 354 pgd = pgd_offset(mm, address);
357 if(!pgd_present(*pgd)) 355 if (!pgd_present(*pgd))
358 goto kill; 356 goto kill;
359 357
360 pud = pud_offset(pgd, address); 358 pud = pud_offset(pgd, address);
361 if(!pud_present(*pud)) 359 if (!pud_present(*pud))
362 goto kill; 360 goto kill;
363 361
364 pmd = pmd_offset(pud, address); 362 pmd = pmd_offset(pud, address);
365 if(!pmd_present(*pmd)) 363 if (!pmd_present(*pmd))
366 goto kill; 364 goto kill;
367 365
368 pte = pte_offset_kernel(pmd, address); 366 pte = pte_offset_kernel(pmd, address);
@@ -380,8 +378,8 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
380 mm_id = &mm->context.skas.id; 378 mm_id = &mm->context.skas.id;
381 prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | 379 prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
382 (x ? UM_PROT_EXEC : 0)); 380 (x ? UM_PROT_EXEC : 0));
383 if(pte_newpage(*pte)){ 381 if (pte_newpage(*pte)) {
384 if(pte_present(*pte)){ 382 if (pte_present(*pte)) {
385 unsigned long long offset; 383 unsigned long long offset;
386 int fd; 384 int fd;
387 385
@@ -391,10 +389,10 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
391 } 389 }
392 else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush); 390 else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush);
393 } 391 }
394 else if(pte_newprot(*pte)) 392 else if (pte_newprot(*pte))
395 err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush); 393 err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush);
396 394
397 if(err) 395 if (err)
398 goto kill; 396 goto kill;
399 397
400 *pte = pte_mkuptodate(*pte); 398 *pte = pte_mkuptodate(*pte);
@@ -402,28 +400,28 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
402 return; 400 return;
403 401
404kill: 402kill:
405 printk("Failed to flush page for address 0x%lx\n", address); 403 printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address);
406 force_sig(SIGKILL, current); 404 force_sig(SIGKILL, current);
407} 405}
408 406
409pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) 407pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
410{ 408{
411 return(pgd_offset(mm, address)); 409 return pgd_offset(mm, address);
412} 410}
413 411
414pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) 412pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address)
415{ 413{
416 return(pud_offset(pgd, address)); 414 return pud_offset(pgd, address);
417} 415}
418 416
419pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) 417pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address)
420{ 418{
421 return(pmd_offset(pud, address)); 419 return pmd_offset(pud, address);
422} 420}
423 421
424pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) 422pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address)
425{ 423{
426 return(pte_offset_kernel(pmd, address)); 424 return pte_offset_kernel(pmd, address);
427} 425}
428 426
429pte_t *addr_pte(struct task_struct *task, unsigned long addr) 427pte_t *addr_pte(struct task_struct *task, unsigned long addr)
@@ -432,7 +430,7 @@ pte_t *addr_pte(struct task_struct *task, unsigned long addr)
432 pud_t *pud = pud_offset(pgd, addr); 430 pud_t *pud = pud_offset(pgd, addr);
433 pmd_t *pmd = pmd_offset(pud, addr); 431 pmd_t *pmd = pmd_offset(pud, addr);
434 432
435 return(pte_offset_map(pmd, addr)); 433 return pte_offset_map(pmd, addr);
436} 434}
437 435
438void flush_tlb_all(void) 436void flush_tlb_all(void)
@@ -452,18 +450,18 @@ void flush_tlb_kernel_vm(void)
452 450
453void __flush_tlb_one(unsigned long addr) 451void __flush_tlb_one(unsigned long addr)
454{ 452{
455 flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE); 453 flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
456} 454}
457 455
458static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last, 456static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
459 int finished, void **flush) 457 int finished, void **flush)
460{ 458{
461 struct host_vm_op *op; 459 struct host_vm_op *op;
462 int i, ret = 0; 460 int i, ret = 0;
463 461
464 for(i = 0; i <= last && !ret; i++){ 462 for (i = 0; i <= last && !ret; i++) {
465 op = &ops[i]; 463 op = &ops[i];
466 switch(op->type){ 464 switch(op->type) {
467 case MMAP: 465 case MMAP:
468 ret = map(&mmu->skas.id, op->u.mmap.addr, 466 ret = map(&mmu->skas.id, op->u.mmap.addr,
469 op->u.mmap.len, op->u.mmap.prot, 467 op->u.mmap.len, op->u.mmap.prot,
@@ -480,7 +478,8 @@ static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
480 finished, flush); 478 finished, flush);
481 break; 479 break;
482 default: 480 default:
483 printk("Unknown op type %d in do_ops\n", op->type); 481 printk(KERN_ERR "Unknown op type %d in do_ops\n",
482 op->type);
484 break; 483 break;
485 } 484 }
486 } 485 }
@@ -491,32 +490,33 @@ static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
491static void fix_range(struct mm_struct *mm, unsigned long start_addr, 490static void fix_range(struct mm_struct *mm, unsigned long start_addr,
492 unsigned long end_addr, int force) 491 unsigned long end_addr, int force)
493{ 492{
494 if(!proc_mm && (end_addr > CONFIG_STUB_START)) 493 if (!proc_mm && (end_addr > CONFIG_STUB_START))
495 end_addr = CONFIG_STUB_START; 494 end_addr = CONFIG_STUB_START;
496 495
497 fix_range_common(mm, start_addr, end_addr, force, do_ops); 496 fix_range_common(mm, start_addr, end_addr, force, do_ops);
498} 497}
499 498
500void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 499void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
501 unsigned long end) 500 unsigned long end)
502{ 501{
503 if(vma->vm_mm == NULL) 502 if (vma->vm_mm == NULL)
504 flush_tlb_kernel_range_common(start, end); 503 flush_tlb_kernel_range_common(start, end);
505 else fix_range(vma->vm_mm, start, end, 0); 504 else fix_range(vma->vm_mm, start, end, 0);
506} 505}
507 506
508void flush_tlb_mm(struct mm_struct *mm) 507void flush_tlb_mm(struct mm_struct *mm)
509{ 508{
510 unsigned long end; 509 unsigned long end;
511 510
512 /* Don't bother flushing if this address space is about to be 511 /*
513 * destroyed. 512 * Don't bother flushing if this address space is about to be
514 */ 513 * destroyed.
515 if(atomic_read(&mm->mm_users) == 0) 514 */
516 return; 515 if (atomic_read(&mm->mm_users) == 0)
516 return;
517 517
518 end = proc_mm ? task_size : CONFIG_STUB_START; 518 end = proc_mm ? task_size : CONFIG_STUB_START;
519 fix_range(mm, 0, end, 0); 519 fix_range(mm, 0, end, 0);
520} 520}
521 521
522void force_flush_all(void) 522void force_flush_all(void)
@@ -524,7 +524,7 @@ void force_flush_all(void)
524 struct mm_struct *mm = current->mm; 524 struct mm_struct *mm = current->mm;
525 struct vm_area_struct *vma = mm->mmap; 525 struct vm_area_struct *vma = mm->mmap;
526 526
527 while(vma != NULL) { 527 while (vma != NULL) {
528 fix_range(mm, vma->vm_start, vma->vm_end, 1); 528 fix_range(mm, vma->vm_start, vma->vm_end, 1);
529 vma = vma->vm_next; 529 vma = vma->vm_next;
530 } 530 }
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 5f3e13c365e5..1993e5e12256 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -1,39 +1,22 @@
1/* 1/*
2 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/kernel.h"
7#include "linux/sched.h"
8#include "linux/notifier.h"
9#include "linux/mm.h"
10#include "linux/types.h"
11#include "linux/tty.h"
12#include "linux/init.h"
13#include "linux/bootmem.h"
14#include "linux/spinlock.h"
15#include "linux/utsname.h"
16#include "linux/sysrq.h"
17#include "linux/seq_file.h"
18#include "linux/delay.h" 6#include "linux/delay.h"
7#include "linux/mm.h"
19#include "linux/module.h" 8#include "linux/module.h"
9#include "linux/seq_file.h"
10#include "linux/string.h"
20#include "linux/utsname.h" 11#include "linux/utsname.h"
21#include "asm/page.h"
22#include "asm/pgtable.h" 12#include "asm/pgtable.h"
23#include "asm/ptrace.h" 13#include "asm/processor.h"
24#include "asm/elf.h"
25#include "asm/user.h"
26#include "asm/setup.h" 14#include "asm/setup.h"
27#include "ubd_user.h"
28#include "asm/current.h"
29#include "kern_util.h"
30#include "as-layout.h"
31#include "arch.h" 15#include "arch.h"
16#include "as-layout.h"
17#include "init.h"
32#include "kern.h" 18#include "kern.h"
33#include "mem_user.h" 19#include "mem_user.h"
34#include "mem.h"
35#include "initrd.h"
36#include "init.h"
37#include "os.h" 20#include "os.h"
38#include "skas.h" 21#include "skas.h"
39 22
@@ -48,7 +31,7 @@ static void __init add_arg(char *arg)
48 printf("add_arg: Too many command line arguments!\n"); 31 printf("add_arg: Too many command line arguments!\n");
49 exit(1); 32 exit(1);
50 } 33 }
51 if(strlen(command_line) > 0) 34 if (strlen(command_line) > 0)
52 strcat(command_line, " "); 35 strcat(command_line, " ");
53 strcat(command_line, arg); 36 strcat(command_line, arg);
54} 37}
@@ -133,7 +116,7 @@ static int have_root __initdata = 0;
133/* Set in uml_mem_setup and modified in linux_main */ 116/* Set in uml_mem_setup and modified in linux_main */
134long long physmem_size = 32 * 1024 * 1024; 117long long physmem_size = 32 * 1024 * 1024;
135 118
136static char *usage_string = 119static char *usage_string =
137"User Mode Linux v%s\n" 120"User Mode Linux v%s\n"
138" available at http://user-mode-linux.sourceforge.net/\n\n"; 121" available at http://user-mode-linux.sourceforge.net/\n\n";
139 122
@@ -191,7 +174,7 @@ static int __init uml_ncpus_setup(char *line, int *add)
191 174
192__uml_setup("ncpus=", uml_ncpus_setup, 175__uml_setup("ncpus=", uml_ncpus_setup,
193"ncpus=<# of desired CPUs>\n" 176"ncpus=<# of desired CPUs>\n"
194" This tells an SMP kernel how many virtual processors to start.\n\n" 177" This tells an SMP kernel how many virtual processors to start.\n\n"
195); 178);
196#endif 179#endif
197 180
@@ -223,9 +206,8 @@ static int __init uml_checksetup(char *line, int *add)
223 int n; 206 int n;
224 207
225 n = strlen(p->str); 208 n = strlen(p->str);
226 if(!strncmp(line, p->str, n)){ 209 if (!strncmp(line, p->str, n) && p->setup_func(line + n, add))
227 if (p->setup_func(line + n, add)) return 1; 210 return 1;
228 }
229 p++; 211 p++;
230 } 212 }
231 return 0; 213 return 0;
@@ -236,7 +218,7 @@ static void __init uml_postsetup(void)
236 initcall_t *p; 218 initcall_t *p;
237 219
238 p = &__uml_postsetup_start; 220 p = &__uml_postsetup_start;
239 while(p < &__uml_postsetup_end){ 221 while(p < &__uml_postsetup_end) {
240 (*p)(); 222 (*p)();
241 p++; 223 p++;
242 } 224 }
@@ -272,16 +254,18 @@ int __init linux_main(int argc, char **argv)
272 unsigned int i, add; 254 unsigned int i, add;
273 char * mode; 255 char * mode;
274 256
275 for (i = 1; i < argc; i++){ 257 for (i = 1; i < argc; i++) {
276 if((i == 1) && (argv[i][0] == ' ')) continue; 258 if ((i == 1) && (argv[i][0] == ' '))
259 continue;
277 add = 1; 260 add = 1;
278 uml_checksetup(argv[i], &add); 261 uml_checksetup(argv[i], &add);
279 if (add) 262 if (add)
280 add_arg(argv[i]); 263 add_arg(argv[i]);
281 } 264 }
282 if(have_root == 0) 265 if (have_root == 0)
283 add_arg(DEFAULT_COMMAND_LINE); 266 add_arg(DEFAULT_COMMAND_LINE);
284 267
268 /* OS sanity checks that need to happen before the kernel runs */
285 os_early_checks(); 269 os_early_checks();
286 270
287 can_do_skas(); 271 can_do_skas();
@@ -302,12 +286,14 @@ int __init linux_main(int argc, char **argv)
302 286
303 brk_start = (unsigned long) sbrk(0); 287 brk_start = (unsigned long) sbrk(0);
304 288
305 /* Increase physical memory size for exec-shield users 289 /*
306 so they actually get what they asked for. This should 290 * Increase physical memory size for exec-shield users
307 add zero for non-exec shield users */ 291 * so they actually get what they asked for. This should
292 * add zero for non-exec shield users
293 */
308 294
309 diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); 295 diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
310 if(diff > 1024 * 1024){ 296 if (diff > 1024 * 1024) {
311 printf("Adding %ld bytes to physical memory to account for " 297 printf("Adding %ld bytes to physical memory to account for "
312 "exec-shield gap\n", diff); 298 "exec-shield gap\n", diff);
313 physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); 299 physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
@@ -324,11 +310,12 @@ int __init linux_main(int argc, char **argv)
324 iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK; 310 iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
325 max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC; 311 max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC;
326 312
327 /* Zones have to begin on a 1 << MAX_ORDER page boundary, 313 /*
314 * Zones have to begin on a 1 << MAX_ORDER page boundary,
328 * so this makes sure that's true for highmem 315 * so this makes sure that's true for highmem
329 */ 316 */
330 max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1); 317 max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1);
331 if(physmem_size + iomem_size > max_physmem){ 318 if (physmem_size + iomem_size > max_physmem) {
332 highmem = physmem_size + iomem_size - max_physmem; 319 highmem = physmem_size + iomem_size - max_physmem;
333 physmem_size -= highmem; 320 physmem_size -= highmem;
334#ifndef CONFIG_HIGHMEM 321#ifndef CONFIG_HIGHMEM
@@ -345,7 +332,7 @@ int __init linux_main(int argc, char **argv)
345 start_vm = VMALLOC_START; 332 start_vm = VMALLOC_START;
346 333
347 setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); 334 setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
348 if(init_maps(physmem_size, iomem_size, highmem)){ 335 if (init_maps(physmem_size, iomem_size, highmem)) {
349 printf("Failed to allocate mem_map for %Lu bytes of physical " 336 printf("Failed to allocate mem_map for %Lu bytes of physical "
350 "memory and %Lu bytes of highmem\n", physmem_size, 337 "memory and %Lu bytes of highmem\n", physmem_size,
351 highmem); 338 highmem);
@@ -354,10 +341,11 @@ int __init linux_main(int argc, char **argv)
354 341
355 virtmem_size = physmem_size; 342 virtmem_size = physmem_size;
356 avail = get_kmem_end() - start_vm; 343 avail = get_kmem_end() - start_vm;
357 if(physmem_size > avail) virtmem_size = avail; 344 if (physmem_size > avail)
345 virtmem_size = avail;
358 end_vm = start_vm + virtmem_size; 346 end_vm = start_vm + virtmem_size;
359 347
360 if(virtmem_size < physmem_size) 348 if (virtmem_size < physmem_size)
361 printf("Kernel virtual memory size shrunk to %lu bytes\n", 349 printf("Kernel virtual memory size shrunk to %lu bytes\n",
362 virtmem_size); 350 virtmem_size);
363 351
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-25 06:28:17 -0400