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-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 5064fb691eb..0d260567fd1 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -1,24 +1,19 @@
/*
- * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/slab.h"
+#include "linux/stddef.h"
+#include "linux/fs.h"
#include "linux/smp_lock.h"
#include "linux/ptrace.h"
-#include "linux/fs.h"
-#include "asm/ptrace.h"
-#include "asm/pgtable.h"
-#include "asm/tlbflush.h"
+#include "linux/sched.h"
+#include "asm/current.h"
+#include "asm/processor.h"
#include "asm/uaccess.h"
-#include "kern_util.h"
-#include "as-layout.h"
#include "mem_user.h"
-#include "kern.h"
-#include "irq_user.h"
-#include "tlb.h"
+#include "skas.h"
#include "os.h"
-#include "skas/skas.h"
void flush_thread(void)
{
@@ -29,8 +24,8 @@ void flush_thread(void)
arch_flush_thread(&current->thread.arch);
ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
- if(ret){
- printk("flush_thread - clearing address space failed, "
+ if (ret) {
+ printk(KERN_ERR "flush_thread - clearing address space failed, "
"err = %d\n", ret);
force_sig(SIGKILL, current);
}
@@ -52,7 +47,7 @@ extern void log_exec(char **argv, void *tty);
static long execve1(char *file, char __user * __user *argv,
char __user *__user *env)
{
- long error;
+ long error;
#ifdef CONFIG_TTY_LOG
struct tty_struct *tty;
@@ -62,16 +57,16 @@ static long execve1(char *file, char __user * __user *argv,
log_exec(argv, tty);
mutex_unlock(&tty_mutex);
#endif
- error = do_execve(file, argv, env, &current->thread.regs);
- if (error == 0){
+ error = do_execve(file, argv, env, &current->thread.regs);
+ if (error == 0) {
task_lock(current);
- current->ptrace &= ~PT_DTRACE;
+ current->ptrace &= ~PT_DTRACE;
#ifdef SUBARCH_EXECVE1
SUBARCH_EXECVE1(&current->thread.regs.regs);
#endif
task_unlock(current);
- }
- return(error);
+ }
+ return error;
}
long 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)
long err;
err = execve1(file, argv, env);
- if(!err)
+ if (!err)
do_longjmp(current->thread.exec_buf, 1);
- return(err);
+ return err;
}
long sys_execve(char __user *file, char __user *__user *argv,
@@ -98,5 +93,5 @@ long sys_execve(char __user *file, char __user *__user *argv,
putname(filename);
out:
unlock_kernel();
- return(error);
+ return error;
}
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index b10ee28b97c..277fce17b08 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -1,37 +1,19 @@
/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
* Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
*/
-#include "linux/kernel.h"
-#include "linux/module.h"
-#include "linux/smp.h"
-#include "linux/kernel_stat.h"
+#include "linux/cpumask.h"
+#include "linux/hardirq.h"
#include "linux/interrupt.h"
-#include "linux/random.h"
-#include "linux/slab.h"
-#include "linux/file.h"
-#include "linux/proc_fs.h"
-#include "linux/init.h"
+#include "linux/kernel_stat.h"
+#include "linux/module.h"
#include "linux/seq_file.h"
-#include "linux/profile.h"
-#include "linux/hardirq.h"
-#include "asm/irq.h"
-#include "asm/hw_irq.h"
-#include "asm/atomic.h"
-#include "asm/signal.h"
-#include "asm/system.h"
-#include "asm/errno.h"
-#include "asm/uaccess.h"
+#include "as-layout.h"
#include "kern_util.h"
-#include "irq_user.h"
-#include "irq_kern.h"
#include "os.h"
-#include "sigio.h"
-#include "misc_constants.h"
-#include "as-layout.h"
/*
* Generic, controller-independent functions:
@@ -71,9 +53,8 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
+ } else if (i == NR_IRQS)
seq_putc(p, '\n');
- }
return 0;
}
@@ -102,11 +83,13 @@ void sigio_handler(int sig, struct uml_pt_regs *regs)
while (1) {
n = os_waiting_for_events(active_fds);
if (n <= 0) {
- if(n == -EINTR) continue;
+ if (n == -EINTR)
+ continue;
else break;
}
- for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+ for (irq_fd = active_fds; irq_fd != NULL;
+ irq_fd = irq_fd->next) {
if (irq_fd->current_events != 0) {
irq_fd->current_events = 0;
do_IRQ(irq_fd->irq, regs);
@@ -138,8 +121,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
if (type == IRQ_READ)
events = UM_POLLIN | UM_POLLPRI;
- else
- events = UM_POLLOUT;
+ else events = UM_POLLOUT;
*new_fd = ((struct irq_fd) { .next = NULL,
.id = dev_id,
.fd = fd,
@@ -153,9 +135,10 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
spin_lock_irqsave(&irq_lock, flags);
for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
- printk("Registering fd %d twice\n", fd);
- printk("Irqs : %d, %d\n", irq_fd->irq, irq);
- printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id);
+ printk(KERN_ERR "Registering fd %d twice\n", fd);
+ printk(KERN_ERR "Irqs : %d, %d\n", irq_fd->irq, irq);
+ printk(KERN_ERR "Ids : 0x%p, 0x%p\n", irq_fd->id,
+ dev_id);
goto out_unlock;
}
}
@@ -171,7 +154,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
if (n == 0)
break;
- /* n > 0
+ /*
+ * n > 0
* It means we couldn't put new pollfd to current pollfds
* and tmp_fds is NULL or too small for new pollfds array.
* Needed size is equal to n as minimum.
@@ -197,7 +181,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
spin_unlock_irqrestore(&irq_lock, flags);
- /* This calls activate_fd, so it has to be outside the critical
+ /*
+ * This calls activate_fd, so it has to be outside the critical
* section.
*/
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)
i++;
}
if (irq == NULL) {
- printk("find_irq_by_fd doesn't have descriptor %d\n", fd);
+ printk(KERN_ERR "find_irq_by_fd doesn't have descriptor %d\n",
+ fd);
goto out;
}
fdi = os_get_pollfd(i);
if ((fdi != -1) && (fdi != fd)) {
- printk("find_irq_by_fd - mismatch between active_fds and "
- "pollfds, fd %d vs %d, need %d\n", irq->fd,
+ printk(KERN_ERR "find_irq_by_fd - mismatch between active_fds "
+ "and pollfds, fd %d vs %d, need %d\n", irq->fd,
fdi, fd);
irq = NULL;
goto out;
@@ -306,7 +292,7 @@ void deactivate_fd(int fd, int irqnum)
spin_lock_irqsave(&irq_lock, flags);
irq = find_irq_by_fd(fd, irqnum, &i);
- if(irq == NULL){
+ if (irq == NULL) {
spin_unlock_irqrestore(&irq_lock, flags);
return;
}
@@ -372,8 +358,10 @@ int um_request_irq(unsigned int irq, int fd, int type,
EXPORT_SYMBOL(um_request_irq);
EXPORT_SYMBOL(reactivate_fd);
-/* hw_interrupt_type must define (startup || enable) &&
- * (shutdown || disable) && end */
+/*
+ * hw_interrupt_type must define (startup || enable) &&
+ * (shutdown || disable) && end
+ */
static void dummy(unsigned int irq)
{
}
@@ -422,7 +410,8 @@ int init_aio_irq(int irq, char *name, irq_handler_t handler)
err = os_pipe(fds, 1, 1);
if (err) {
- printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
+ printk(KERN_ERR "init_aio_irq - os_pipe failed, err = %d\n",
+ -err);
goto out;
}
@@ -430,7 +419,8 @@ int init_aio_irq(int irq, char *name, irq_handler_t handler)
IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name,
(void *) (long) fds[0]);
if (err) {
- printk("init_aio_irq - : um_request_irq failed, err = %d\n",
+ printk(KERN_ERR "init_aio_irq - : um_request_irq failed, "
+ "err = %d\n",
err);
goto out_close;
}
@@ -501,8 +491,9 @@ unsigned long to_irq_stack(unsigned long *mask_out)
int nested;
mask = xchg(&pending_mask, *mask_out);
- if(mask != 0){
- /* If any interrupts come in at this point, we want to
+ if (mask != 0) {
+ /*
+ * If any interrupts come in at this point, we want to
* make sure that their bits aren't lost by our
* putting our bit in. So, this loop accumulates bits
* until xchg returns the same value that we put in.
@@ -514,13 +505,13 @@ unsigned long to_irq_stack(unsigned long *mask_out)
do {
old |= mask;
mask = xchg(&pending_mask, old);
- } while(mask != old);
+ } while (mask != old);
return 1;
}
ti = current_thread_info();
nested = (ti->real_thread != NULL);
- if(!nested){
+ if (!nested) {
struct task_struct *task;
struct thread_info *tti;
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 90e89e83817..a55d221d8a4 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,
err = os_map_memory((void *) virt, fd, offset, len, r, w, x);
if (err) {
if (err == -ENOMEM)
- printk("try increasing the host's "
+ printk(KERN_ERR "try increasing the host's "
"/proc/sys/vm/max_map_count to <physical "
"memory size>/4096\n");
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,
exit(1);
}
- /* Special kludge - This page will be mapped in to userspace processes
+ /*
+ * Special kludge - This page will be mapped in to userspace processes
* from physmem_fd, so it needs to be written out there.
*/
os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
@@ -202,8 +203,8 @@ int setup_iomem(void)
err = os_map_memory((void *) iomem_start, region->fd, 0,
region->size, 1, 1, 0);
if (err)
- printk("Mapping iomem region for driver '%s' failed, "
- "errno = %d\n", region->driver, -err);
+ printk(KERN_ERR "Mapping iomem region for driver '%s' "
+ "failed, errno = %d\n", region->driver, -err);
else {
region->virt = iomem_start;
region->phys = __pa(region->virt);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index d3b9c62e73c..7c037fa9c5b 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -1,51 +1,29 @@
/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright 2003 PathScale, Inc.
* Licensed under the GPL
*/
-#include "linux/kernel.h"
-#include "linux/sched.h"
-#include "linux/interrupt.h"
-#include "linux/string.h"
+#include "linux/stddef.h"
+#include "linux/err.h"
+#include "linux/hardirq.h"
#include "linux/mm.h"
-#include "linux/slab.h"
-#include "linux/utsname.h"
-#include "linux/fs.h"
-#include "linux/utime.h"
-#include "linux/smp_lock.h"
-#include "linux/module.h"
-#include "linux/init.h"
-#include "linux/capability.h"
-#include "linux/vmalloc.h"
-#include "linux/spinlock.h"
+#include "linux/personality.h"
#include "linux/proc_fs.h"
#include "linux/ptrace.h"
#include "linux/random.h"
-#include "linux/personality.h"
-#include "asm/unistd.h"
-#include "asm/mman.h"
-#include "asm/segment.h"
-#include "asm/stat.h"
+#include "linux/sched.h"
+#include "linux/threads.h"
#include "asm/pgtable.h"
-#include "asm/processor.h"
-#include "asm/tlbflush.h"
#include "asm/uaccess.h"
-#include "asm/user.h"
-#include "kern_util.h"
#include "as-layout.h"
-#include "kern.h"
-#include "signal_kern.h"
-#include "init.h"
-#include "irq_user.h"
-#include "mem_user.h"
-#include "tlb.h"
-#include "frame_kern.h"
-#include "sigcontext.h"
+#include "kern_util.h"
#include "os.h"
#include "skas.h"
+#include "tlb.h"
-/* This is a per-cpu array. A processor only modifies its entry and it only
+/*
+ * This is a per-cpu array. A processor only modifies its entry and it only
* cares about its entry, so it's OK if another processor is modifying its
* entry.
*/
@@ -54,15 +32,15 @@ struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
static inline int external_pid(struct task_struct *task)
{
/* FIXME: Need to look up userspace_pid by cpu */
- return(userspace_pid[0]);
+ return userspace_pid[0];
}
int pid_to_processor_id(int pid)
{
int i;
- for(i = 0; i < ncpus; i++){
- if(cpu_tasks[i].pid == pid)
+ for(i = 0; i < ncpus; i++) {
+ if (cpu_tasks[i].pid == pid)
return i;
}
return -1;
@@ -118,7 +96,7 @@ void *_switch_to(void *prev, void *next, void *last)
current->thread.saved_task = NULL;
/* XXX need to check runqueues[cpu].idle */
- if(current->pid == 0)
+ if (current->pid == 0)
switch_timers(0);
switch_threads(&from->thread.switch_buf,
@@ -126,10 +104,10 @@ void *_switch_to(void *prev, void *next, void *last)
arch_switch_to(current->thread.prev_sched, current);
- if(current->pid == 0)
+ if (current->pid == 0)
switch_timers(1);
- if(current->thread.saved_task)
+ if (current->thread.saved_task)
show_regs(&(current->thread.regs));
next= current->thread.saved_task;
prev= current;
@@ -141,9 +119,9 @@ void *_switch_to(void *prev, void *next, void *last)
void interrupt_end(void)
{
- if(need_resched())
+ if (need_resched())
schedule();
- if(test_tsk_thread_flag(current, TIF_SIGPENDING))
+ if (test_tsk_thread_flag(current, TIF_SIGPENDING))
do_signal();
}
@@ -158,7 +136,8 @@ void *get_current(void)
extern void schedule_tail(struct task_struct *prev);
-/* This is called magically, by its address being stuffed in a jmp_buf
+/*
+ * This is called magically, by its address being stuffed in a jmp_buf
* and being longjmp-d to.
*/
void new_thread_handler(void)
@@ -166,18 +145,19 @@ void new_thread_handler(void)
int (*fn)(void *), n;
void *arg;
- if(current->thread.prev_sched != NULL)
+ if (current->thread.prev_sched != NULL)
schedule_tail(current->thread.prev_sched);
current->thread.prev_sched = NULL;
fn = current->thread.request.u.thread.proc;
arg = current->thread.request.u.thread.arg;
- /* The return value is 1 if the kernel thread execs a process,
+ /*
+ * The return value is 1 if the kernel thread execs a process,
* 0 if it just exits
*/
n = run_kernel_thread(fn, arg, &current->thread.exec_buf);
- if(n == 1){
+ if (n == 1) {
/* Handle any immediate reschedules or signals */
interrupt_end();
userspace(&current->thread.regs.regs);
@@ -189,14 +169,16 @@ void new_thread_handler(void)
void fork_handler(void)
{
force_flush_all();
- if(current->thread.prev_sched == NULL)
+ if (current->thread.prev_sched == NULL)
panic("blech");
schedule_tail(current->thread.prev_sched);
- /* XXX: if interrupt_end() calls schedule, this call to
+ /*
+ * XXX: if interrupt_end() calls schedule, this call to
* arch_switch_to isn't needed. We could want to apply this to
- * improve performance. -bb */
+ * improve performance. -bb
+ */
arch_switch_to(current->thread.prev_sched, current);
current->thread.prev_sched = NULL;
@@ -216,11 +198,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
p->thread = (struct thread_struct) INIT_THREAD;
- if(current->thread.forking){
+ if (current->thread.forking) {
memcpy(&p->thread.regs.regs, &regs->regs,
sizeof(p->thread.regs.regs));
REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.regs, 0);
- if(sp != 0)
+ if (sp != 0)
REGS_SP(p->thread.regs.regs.regs) = sp;
handler = fork_handler;
@@ -259,14 +241,14 @@ void initial_thread_cb(void (*proc)(void *), void *arg)
void default_idle(void)
{
- while(1){
+ while(1) {
/* endless idle loop with no priority at all */
/*
* although we are an idle CPU, we do not want to
* get into the scheduler unnecessarily.
*/
- if(need_resched())
+ if (need_resched())
schedule();
idle_sleep(10);
@@ -288,26 +270,26 @@ void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
pte_t *pte;
pte_t ptent;
- if(task->mm == NULL)
+ if (task->mm == NULL)
return ERR_PTR(-EINVAL);
pgd = pgd_offset(task->mm, addr);
- if(!pgd_present(*pgd))
+ if (!pgd_present(*pgd))
return ERR_PTR(-EINVAL);
pud = pud_offset(pgd, addr);
- if(!pud_present(*pud))
+ if (!pud_present(*pud))
return ERR_PTR(-EINVAL);
pmd = pmd_offset(pud, addr);
- if(!pmd_present(*pmd))
+ if (!pmd_present(*pmd))
return ERR_PTR(-EINVAL);
pte = pte_offset_kernel(pmd, addr);
ptent = *pte;
- if(!pte_present(ptent))
+ if (!pte_present(ptent))
return ERR_PTR(-EINVAL);
- if(pte_out != NULL)
+ if (pte_out != NULL)
*pte_out = ptent;
return (void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK);
}
@@ -380,7 +362,7 @@ int smp_sigio_handler(void)
#ifdef CONFIG_SMP
int cpu = current_thread->cpu;
IPI_handler(cpu);
- if(cpu != 0)
+ if (cpu != 0)
return 1;
#endif
return 0;
@@ -408,7 +390,8 @@ int get_using_sysemu(void)
static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data)
{
- if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size) /*No overflow*/
+ if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size)
+ /* No overflow */
*eof = 1;
return strlen(buf);
@@ -423,7 +406,8 @@ static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned
if (tmp[0] >= '0' && tmp[0] <= '2')
set_using_sysemu(tmp[0] - '0');
- return count; /*We use the first char, but pretend to write everything*/
+ /* We use the first char, but pretend to write everything */
+ return count;
}
int __init make_proc_sysemu(void)
@@ -453,10 +437,10 @@ int singlestepping(void * t)
struct task_struct *task = t ? t : current;
if ( ! (task->ptrace & PT_DTRACE) )
- return(0);
+ return 0;
if (task->thread.singlestep_syscall)
- return(1);
+ return 1;
return 2;
}
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index bbc3a4a9a0f..db55a017e9b 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -1,35 +1,27 @@
-/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/sched.h"
-#include "linux/mm.h"
-#include "linux/errno.h"
-#include "linux/smp_lock.h"
-#include "linux/security.h"
-#include "linux/ptrace.h"
#include "linux/audit.h"
+#include "linux/ptrace.h"
+#include "linux/sched.h"
+#include "asm/uaccess.h"
#ifdef CONFIG_PROC_MM
-#include "linux/proc_mm.h"
+#include "proc_mm.h"
#endif
-#include "asm/ptrace.h"
-#include "asm/uaccess.h"
-#include "kern_util.h"
#include "skas_ptrace.h"
-#include "sysdep/ptrace.h"
-#include "os.h"
static inline void set_singlestepping(struct task_struct *child, int on)
{
- if (on)
- child->ptrace |= PT_DTRACE;
- else
- child->ptrace &= ~PT_DTRACE;
- child->thread.singlestep_syscall = 0;
+ if (on)
+ child->ptrace |= PT_DTRACE;
+ else
+ child->ptrace &= ~PT_DTRACE;
+ child->thread.singlestep_syscall = 0;
#ifdef SUBARCH_SET_SINGLESTEPPING
- SUBARCH_SET_SINGLESTEPPING(child, on);
+ SUBARCH_SET_SINGLESTEPPING(child, on);
#endif
}
@@ -37,8 +29,8 @@ static inline void set_singlestepping(struct task_struct *child, int on)
* Called by kernel/ptrace.c when detaching..
*/
void ptrace_disable(struct task_struct *child)
-{
- set_singlestepping(child,0);
+{
+ set_singlestepping(child,0);
}
extern 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)
unsigned long __user *p = (void __user *)(unsigned long)data;
switch (request) {
- /* when I and D space are separate, these will need to be fixed. */
- case PTRACE_PEEKTEXT: /* read word at location addr. */
+ /* read word at location addr. */
+ case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
ret = generic_ptrace_peekdata(child, addr, data);
break;
/* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR:
- ret = peek_user(child, addr, data);
- break;
+ case PTRACE_PEEKUSR:
+ ret = peek_user(child, addr, data);
+ break;
- /* when I and D space are separate, this will have to be fixed. */
- case PTRACE_POKETEXT: /* write the word at location addr. */
+ /* write the word at location addr. */
+ case PTRACE_POKETEXT:
case PTRACE_POKEDATA:
ret = generic_ptrace_pokedata(child, addr, data);
break;
- case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
- ret = poke_user(child, addr, data);
- break;
+ /* write the word at location addr in the USER area */
+ case PTRACE_POKEUSR:
+ ret = poke_user(child, addr, data);
+ break;
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
+ /* continue and stop at next (return from) syscall */
+ case PTRACE_SYSCALL:
+ /* restart after signal. */
+ case PTRACE_CONT: {
ret = -EIO;
if (!valid_signal(data))
break;
- set_singlestepping(child, 0);
- if (request == PTRACE_SYSCALL) {
+ set_singlestepping(child, 0);
+ if (request == PTRACE_SYSCALL)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- }
- else {
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- }
+ else clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
wake_up_process(child);
ret = 0;
@@ -91,8 +83,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
/*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
+ * make the child exit. Best I can do is send it a sigkill.
+ * perhaps it should be put in the status that it wants to
* exit.
*/
case PTRACE_KILL: {
@@ -100,7 +92,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
if (child->exit_state == EXIT_ZOMBIE) /* already dead */
break;
- set_singlestepping(child, 0);
+ set_singlestepping(child, 0);
child->exit_code = SIGKILL;
wake_up_process(child);
break;
@@ -111,7 +103,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
if (!valid_signal(data))
break;
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- set_singlestepping(child, 1);
+ set_singlestepping(child, 1);
child->exit_code = data;
/* give it a chance to run. */
wake_up_process(child);
@@ -180,13 +172,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
case PTRACE_FAULTINFO: {
- /* Take the info from thread->arch->faultinfo,
+ /*
+ * Take the info from thread->arch->faultinfo,
* but transfer max. sizeof(struct ptrace_faultinfo).
* On i386, ptrace_faultinfo is smaller!
*/
ret = copy_to_user(p, &child->thread.arch.faultinfo,
sizeof(struct ptrace_faultinfo));
- if(ret)
+ if (ret)
break;
break;
}
@@ -195,12 +188,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
case PTRACE_LDT: {
struct ptrace_ldt ldt;
- if(copy_from_user(&ldt, p, sizeof(ldt))){
+ if (copy_from_user(&ldt, p, sizeof(ldt))) {
ret = -EIO;
break;
}
- /* This one is confusing, so just punt and return -EIO for
+ /*
+ * This one is confusing, so just punt and return -EIO for
* now
*/
ret = -EIO;
@@ -212,7 +206,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
struct mm_struct *old = child->mm;
struct mm_struct *new = proc_mm_get_mm(data);
- if(IS_ERR(new)){
+ if (IS_ERR(new)) {
ret = PTR_ERR(new);
break;
}
@@ -226,10 +220,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
#endif
#ifdef PTRACE_ARCH_PRCTL
- case PTRACE_ARCH_PRCTL:
- /* XXX Calls ptrace on the host - needs some SMP thinking */
- ret = arch_prctl(child, data, (void *) addr);
- break;
+ case PTRACE_ARCH_PRCTL:
+ /* XXX Calls ptrace on the host - needs some SMP thinking */
+ ret = arch_prctl(child, data, (void *) addr);
+ break;
#endif
default:
ret = ptrace_request(child, request, addr, data);
@@ -255,7 +249,8 @@ void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs,
force_sig_info(SIGTRAP, &info, tsk);
}
-/* XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and
+/*
+ * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and
* PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check
*/
void syscall_trace(struct uml_pt_regs *regs, int entryexit)
@@ -272,7 +267,7 @@ void syscall_trace(struct uml_pt_regs *regs, int entryexit)
UPT_SYSCALL_ARG3(regs),
UPT_SYSCALL_ARG4(regs));
else audit_syscall_exit(AUDITSC_RESULT(UPT_SYSCALL_RET(regs)),
- UPT_SYSCALL_RET(regs));
+ UPT_SYSCALL_RET(regs));
}
/* Fake a debug trap */
@@ -285,15 +280,18 @@ void syscall_trace(struct uml_pt_regs *regs, int entryexit)
if (!(current->ptrace & PT_PTRACED))
return;
- /* the 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
+ /*
+ * the 0x80 provides a way for the tracing parent to distinguish
+ * between a syscall stop and SIGTRAP delivery
+ */
tracesysgood = (current->ptrace & PT_TRACESYSGOOD);
ptrace_notify(SIGTRAP | (tracesysgood ? 0x80 : 0));
if (entryexit) /* force do_signal() --> is_syscall() */
set_thread_flag(TIF_SIGPENDING);
- /* this isn't the same as continuing with a signal, but it will do
+ /*
+ * this isn't the same as continuing with a signal, but it will do
* for normal use. strace only continues with a signal if the
* stopping signal is not SIGTRAP. -brl
*/
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index f3bd18bbf07..9d8eea47a0f 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -1,13 +1,9 @@
/*
- * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/module.h"
#include "linux/sched.h"
-#include "asm/smp.h"
-#include "kern_util.h"
-#include "kern.h"
#include "os.h"
#include "skas.h"
@@ -37,20 +33,20 @@ static void kill_off_processes(void)
void uml_cleanup(void)
{
- kmalloc_ok = 0;
+ kmalloc_ok = 0;
do_uml_exitcalls();
kill_off_processes();
}
void machine_restart(char * __unused)
{
- uml_cleanup();
+ uml_cleanup();
reboot_skas();
}
void machine_power_off(void)
{
- uml_cleanup();
+ uml_cleanup();
halt_skas();
}
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index 4dab7e417ba..19cb9773393 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -1,27 +1,16 @@
/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/stddef.h"
-#include "linux/sys.h"
-#include "linux/sched.h"
-#include "linux/wait.h"
-#include "linux/kernel.h"
-#include "linux/smp_lock.h"
#include "linux/module.h"
-#include "linux/slab.h"
-#include "linux/tty.h"
-#include "linux/binfmts.h"
#include "linux/ptrace.h"
+#include "linux/sched.h"
+#include "asm/siginfo.h"
#include "asm/signal.h"
-#include "asm/uaccess.h"
#include "asm/unistd.h"
-#include "asm/ucontext.h"
-#include "kern_util.h"
-#include "signal_kern.h"
-#include "kern.h"
#include "frame_kern.h"
+#include "kern_util.h"
#include "sigcontext.h"
EXPORT_SYMBOL(block_signals);
@@ -45,9 +34,9 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
current_thread_info()->restart_block.fn = do_no_restart_syscall;
/* Did we come from a system call? */
- if(PT_REGS_SYSCALL_NR(regs) >= 0){
+ if (PT_REGS_SYSCALL_NR(regs) >= 0) {
/* If so, check system call restarting.. */
- switch(PT_REGS_SYSCALL_RET(regs)){
+ switch(PT_REGS_SYSCALL_RET(regs)) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
PT_REGS_SYSCALL_RET(regs) = -EINTR;
@@ -67,17 +56,17 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
}
sp = PT_REGS_SP(regs);
- if((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0))
+ if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0))
sp = current->sas_ss_sp + current->sas_ss_size;
#ifdef CONFIG_ARCH_HAS_SC_SIGNALS
- if(!(ka->sa.sa_flags & SA_SIGINFO))
+ if (!(ka->sa.sa_flags & SA_SIGINFO))
err = setup_signal_stack_sc(sp, signr, ka, regs, oldset);
else
#endif
err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset);
- if(err){
+ if (err) {
spin_lock_irq(&current->sighand->siglock);
current->blocked = *oldset;
recalc_sigpending();
@@ -87,7 +76,7 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked, &current->blocked,
&ka->sa.sa_mask);
- if(!(ka->sa.sa_flags & SA_NODEFER))
+ if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&current->blocked, signr);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
@@ -108,14 +97,16 @@ static int kern_do_signal(struct pt_regs *regs)
else
oldset = &current->blocked;
- while((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0){
+ while ((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0) {
handled_sig = 1;
/* Whee! Actually deliver the signal. */
- if(!handle_signal(regs, sig, &ka_copy, &info, oldset)){
- /* a signal was successfully delivered; the saved
+ if (!handle_signal(regs, sig, &ka_copy, &info, oldset)) {
+ /*
+ * a signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
* and will be restored by sigreturn, so we can simply
- * clear the TIF_RESTORE_SIGMASK flag */
+ * clear the TIF_RESTORE_SIGMASK flag
+ */
if (test_thread_flag(TIF_RESTORE_SIGMASK))
clear_thread_flag(TIF_RESTORE_SIGMASK);
break;
@@ -123,9 +114,9 @@ static int kern_do_signal(struct pt_regs *regs)
}
/* Did we come from a system call? */
- if(!handled_sig && (PT_REGS_SYSCALL_NR(regs) >= 0)){
+ if (!handled_sig && (PT_REGS_SYSCALL_NR(regs) >= 0)) {
/* Restart the system call - no handlers present */
- switch(PT_REGS_SYSCALL_RET(regs)){
+ switch(PT_REGS_SYSCALL_RET(regs)) {
case -ERESTARTNOHAND:
case -ERESTARTSYS:
case -ERESTARTNOINTR:
@@ -136,22 +127,25 @@ static int kern_do_signal(struct pt_regs *regs)
PT_REGS_ORIG_SYSCALL(regs) = __NR_restart_syscall;
PT_REGS_RESTART_SYSCALL(regs);
break;
- }
+ }
}
- /* This closes a way to execute a system call on the host. If
+ /*
+ * This closes a way to execute a system call on the host. If
* you set a breakpoint on a system call instruction and singlestep
* from it, the tracing thread used to PTRACE_SINGLESTEP the process
* rather than PTRACE_SYSCALL it, allowing the system call to execute
* on the host. The tracing thread will check this flag and
* PTRACE_SYSCALL if necessary.
*/
- if(current->ptrace & PT_DTRACE)
+ if (current->ptrace & PT_DTRACE)
current->thread.singlestep_syscall =
is_syscall(PT_REGS_IP(&current->thread.regs));
- /* if there's no signal to deliver, we just put the saved sigmask
- * back */
+ /*
+ * if there's no signal to deliver, we just put the saved sigmask
+ * back
+ */
if (!handled_sig && test_thread_flag(TIF_RESTORE_SIGMASK)) {
clear_thread_flag(TIF_RESTORE_SIGMASK);
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index b2823cdd783..0b76d8869c9 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -1,5 +1,5 @@
#
-# Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com)
+# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
# Licensed under the GPL
#
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 902d7413895..c5475ecd9fd 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -1,20 +1,12 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/sched.h"
-#include "linux/list.h"
-#include "linux/spinlock.h"
-#include "linux/slab.h"
-#include "linux/errno.h"
#include "linux/mm.h"
-#include "asm/current.h"
-#include "asm/segment.h"
-#include "asm/mmu.h"
+#include "linux/sched.h"
#include "asm/pgalloc.h"
#include "asm/pgtable.h"
-#include "asm/ldt.h"
#include "os.h"
#include "skas.h"
@@ -41,10 +33,11 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
if (!pte)
goto out_pte;
- /* There's an interaction between the skas0 stub pages, stack
+ /*
+ * There's an interaction between the skas0 stub pages, stack
* randomization, and the BUG at the end of exit_mmap. exit_mmap
- * checks that the number of page tables freed is the same as had
- * been allocated. If the stack is on the last page table page,
+ * checks that the number of page tables freed is the same as had
+ * been allocated. If the stack is on the last page table page,
* then the stack pte page will be freed, and if not, it won't. To
* avoid having to know where the stack is, or if the process mapped
* 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,
* destroy_context_skas.
*/
- mm->context.skas.last_page_table = pmd_page_vaddr(*pmd);
+ mm->context.skas.last_page_table = pmd_page_vaddr(*pmd);
#ifdef CONFIG_3_LEVEL_PGTABLES
- mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud));
+ mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud));
#endif
*pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
*pte = pte_mkread(*pte);
- return(0);
+ return 0;
out_pmd:
pud_free(pud);
out_pte:
pmd_free(pmd);
out:
- return(-ENOMEM);
+ return -ENOMEM;
}
int init_new_context(struct task_struct *task, struct mm_struct *mm)
{
- struct mmu_context_skas *from_mm = NULL;
+ struct mmu_context_skas *from_mm = NULL;
struct mmu_context_skas *to_mm = &mm->context.skas;
unsigned long stack = 0;
int ret = -ENOMEM;
- if(skas_needs_stub){
+ if (skas_needs_stub) {
stack = get_zeroed_page(GFP_KERNEL);
- if(stack == 0)
+ if (stack == 0)
goto out;
- /* This zeros the entry that pgd_alloc didn't, needed since
+ /*
+ * This zeros the entry that pgd_alloc didn't, needed since
* we are about to reinitialize it, and want mm.nr_ptes to
* be accurate.
*/
@@ -91,39 +85,39 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
ret = init_stub_pte(mm, CONFIG_STUB_CODE,
(unsigned long) &__syscall_stub_start);
- if(ret)
+ if (ret)
goto out_free;
ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack);
- if(ret)
+ if (ret)
goto out_free;
mm->nr_ptes--;
}
to_mm->id.stack = stack;
- if(current->mm != NULL && current->mm != &init_mm)
+ if (current->mm != NULL && current->mm != &init_mm)
from_mm = &current->mm->context.skas;
- if(proc_mm){
+ if (proc_mm) {
ret = new_mm(stack);
- if(ret < 0){
- printk("init_new_context_skas - new_mm failed, "
- "errno = %d\n", ret);
+ if (ret < 0) {
+ printk(KERN_ERR "init_new_context_skas - "
+ "new_mm failed, errno = %d\n", ret);
goto out_free;
}
to_mm->id.u.mm_fd = ret;
}
else {
- if(from_mm)
+ if (from_mm)
to_mm->id.u.pid = copy_context_skas0(stack,
from_mm->id.u.pid);
else to_mm->id.u.pid = start_userspace(stack);
}
ret = init_new_ldt(to_mm, from_mm);
- if(ret < 0){
- printk("init_new_context_skas - init_ldt"
+ if (ret < 0) {
+ printk(KERN_ERR "init_new_context_skas - init_ldt"
" failed, errno = %d\n", ret);
goto out_free;
}
@@ -131,7 +125,7 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
return 0;
out_free:
- if(to_mm->id.stack != 0)
+ if (to_mm->id.stack != 0)
free_page(to_mm->id.stack);
out:
return ret;
@@ -141,12 +135,12 @@ void destroy_context(struct mm_struct *mm)
{
struct mmu_context_skas *mmu = &mm->context.skas;
- if(proc_mm)
+ if (proc_mm)
os_close_file(mmu->id.u.mm_fd);
else
os_kill_ptraced_process(mmu->id.u.pid, 1);
- if(!proc_mm || !ptrace_faultinfo){
+ if (!proc_mm || !ptrace_faultinfo) {
free_page(mmu->id.stack);
pte_lock_deinit(virt_to_page(mmu->last_page_table));
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 dabae62d52b..9ce1c49421f 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -1,36 +1,23 @@
/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/sched.h"
-#include "linux/slab.h"
-#include "linux/ptrace.h"
-#include "linux/proc_fs.h"
-#include "linux/file.h"
-#include "linux/errno.h"
#include "linux/init.h"
-#include "asm/uaccess.h"
-#include "asm/atomic.h"
-#include "kern_util.h"
+#include "linux/sched.h"
#include "as-layout.h"
-#include "skas.h"
#include "os.h"
-#include "tlb.h"
-#include "kern.h"
-#include "registers.h"
-
-extern void schedule_tail(struct task_struct *prev);
+#include "skas.h"
int new_mm(unsigned long stack)
{
int fd;
fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
- if(fd < 0)
+ if (fd < 0)
return fd;
- if(skas_needs_stub)
+ if (skas_needs_stub)
map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
return fd;
@@ -62,7 +49,7 @@ int __init start_uml(void)
{
stack_protections((unsigned long) &cpu0_irqstack);
set_sigstack(cpu0_irqstack, THREAD_SIZE);
- if(proc_mm)
+ if (proc_mm)
userspace_pid[0] = start_userspace(0);
init_new_thread_signals();
@@ -75,7 +62,7 @@ int __init start_uml(void)
unsigned long current_stub_stack(void)
{
- if(current->mm == NULL)
+ if (current->mm == NULL)
return 0;
return current->mm->context.skas.id.stack;
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
index e183da633c8..8582c133104 100644
--- a/arch/um/kernel/skas/syscall.c
+++ b/arch/um/kernel/skas/syscall.c
@@ -1,17 +1,13 @@
/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/sys.h"
+#include "linux/kernel.h"
#include "linux/ptrace.h"
-#include "asm/errno.h"
-#include "asm/unistd.h"
-#include "asm/ptrace.h"
-#include "asm/current.h"
-#include "sysdep/syscalls.h"
#include "kern_util.h"
-#include "syscall.h"
+#include "sysdep/ptrace.h"
+#include "sysdep/syscalls.h"
void handle_syscall(struct uml_pt_regs *r)
{
@@ -24,7 +20,8 @@ void handle_syscall(struct uml_pt_regs *r)
current->thread.nsyscalls++;
nsyscalls++;
- /* This should go in the declaration of syscall, but when I do that,
+ /*
+ * This should go in the declaration of syscall, but when I do that,
* strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
* children at all, sometimes hanging when bash doesn't see the first
* ls exit.
@@ -33,7 +30,7 @@ void handle_syscall(struct uml_pt_regs *r)
* in case it's a compiler bug.
*/
syscall = UPT_SYSCALL_NR(r);
- if((syscall >= NR_syscalls) || (syscall < 0))
+ if ((syscall >= NR_syscalls) || (syscall < 0))
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index ebb29f5259a..b9d92b2089a 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -1,25 +1,17 @@
/*
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/sched.h"
#include "linux/file.h"
-#include "linux/smp_lock.h"
-#include "linux/mm.h"
#include "linux/fs.h"
+#include "linux/mm.h"
+#include "linux/sched.h"
#include "linux/utsname.h"
-#include "linux/msg.h"
-#include "linux/shm.h"
-#include "linux/sys.h"
-#include "linux/syscalls.h"
-#include "linux/unistd.h"
-#include "linux/slab.h"
-#include "linux/utime.h"
+#include "asm/current.h"
#include "asm/mman.h"
#include "asm/uaccess.h"
-#include "kern_util.h"
-#include "sysdep/syscalls.h"
+#include "asm/unistd.h"
/* Unlocked, I don't care if this is a bit off */
int nsyscalls = 0;
@@ -32,7 +24,7 @@ long sys_fork(void)
ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
&current->thread.regs, 0, NULL, NULL);
current->thread.forking = 0;
- return(ret);
+ return ret;
}
long sys_vfork(void)
@@ -44,7 +36,7 @@ long sys_vfork(void)
UPT_SP(&current->thread.regs.regs),
&current->thread.regs, 0, NULL, NULL);
current->thread.forking = 0;
- return(ret);
+ return ret;
}
/* common code for old and new mmaps */
@@ -90,15 +82,15 @@ long old_mmap(unsigned long addr, unsigned long len,
*/
long sys_pipe(unsigned long __user * fildes)
{
- int fd[2];
- long error;
+ int fd[2];
+ long error;
- error = do_pipe(fd);
- if (!error) {
+ error = do_pipe(fd);
+ if (!error) {
if (copy_to_user(fildes, fd, sizeof(fd)))
- error = -EFAULT;
- }
- return error;
+ error = -EFAULT;
+ }
+ return error;
}
@@ -122,7 +114,7 @@ long sys_olduname(struct oldold_utsname __user * name)
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
return -EFAULT;
- down_read(&uts_sem);
+ down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 90e24e2dbea..4fc8c2586b7 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -1,28 +1,19 @@
/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/kernel.h"
-#include "linux/module.h"
-#include "linux/unistd.h"
-#include "linux/stddef.h"
-#include "linux/spinlock.h"
-#include "linux/time.h"
-#include "linux/sched.h"
#include "linux/interrupt.h"
-#include "linux/init.h"
-#include "linux/delay.h"
-#include "linux/hrtimer.h"
+#include "linux/jiffies.h"
+#include "linux/threads.h"
#include "asm/irq.h"
#include "asm/param.h"
-#include "asm/current.h"
#include "kern_util.h"
#include "os.h"
int hz(void)
{
- return(HZ);
+ return HZ;
}
/*
@@ -43,7 +34,7 @@ void timer_irq(struct uml_pt_regs *regs)
unsigned long long ticks = 0;
#ifdef CONFIG_UML_REAL_TIME_CLOCK
int c = cpu();
- if(prev_nsecs[c]){
+ if (prev_nsecs[c]) {
/* We've had 1 tick */
unsigned long long nsecs = os_nsecs();
@@ -51,7 +42,7 @@ void timer_irq(struct uml_pt_regs *regs)
prev_nsecs[c] = nsecs;
/* Protect against the host clock being set backwards */
- if(delta[c] < 0)
+ if (delta[c] < 0)
delta[c] = 0;
ticks += (delta[c] * HZ) / BILLION;
@@ -61,7 +52,7 @@ void timer_irq(struct uml_pt_regs *regs)
#else
ticks = 1;
#endif
- while(ticks > 0){
+ while (ticks > 0) {
do_IRQ(TIMER_IRQ, regs);
ticks--;
}
@@ -112,12 +103,12 @@ static void register_timer(void)
int err;
err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL);
- if(err != 0)
+ if (err != 0)
printk(KERN_ERR "register_timer : request_irq failed - "
"errno = %d\n", -err);
err = set_interval(1);
- if(err != 0)
+ if (err != 0)
printk(KERN_ERR "register_timer : set_interval failed - "
"errno = %d\n", -err);
}
@@ -144,7 +135,8 @@ void do_gettimeofday(struct timeval *tv)
xtime.tv_nsec;
#endif
tv->tv_sec = nsecs / NSEC_PER_SEC;
- /* Careful about calculations here - this was originally done as
+ /*
+ * Careful about calculations here - this was originally done as
* (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC
* which gave bogus (> 1000000) values. Dunno why, suspect gcc
* (4.0.0) miscompiled it, or there's a subtle 64/32-bit conversion
@@ -176,7 +168,7 @@ int do_settimeofday(struct timespec *tv)
void timer_handler(int sig, struct uml_pt_regs *regs)
{
- if(current_thread->cpu == 0)
+ if (current_thread->cpu == 0)
timer_irq(regs);
local_irq_disable();
irq_enter();
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 12b8c637527..849922fcfb6 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -1,19 +1,16 @@
/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include "linux/mm.h"
-#include "asm/page.h"
-#include "asm/pgalloc.h"
#include "asm/pgtable.h"
#include "asm/tlbflush.h"
#include "as-layout.h"
-#include "tlb.h"
-#include "mem.h"
#include "mem_user.h"
#include "os.h"
#include "skas.h"
+#include "tlb.h"
static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
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,
int fd, ret = 0;
fd = phys_mapping(phys, &offset);
- if(*index != -1){
+ if (*index != -1) {
last = &ops[*index];
- if((last->type == MMAP) &&
+ if ((last->type == MMAP) &&
(last->u.mmap.addr + last->u.mmap.len == virt) &&
(last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) &&
- (last->u.mmap.offset + last->u.mmap.len == offset)){
+ (last->u.mmap.offset + last->u.mmap.len == offset)) {
last->u.mmap.len += len;
return 0;
}
}
- if(*index == last_filled){
+ if (*index == last_filled) {
ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
*index = -1;
}
@@ -62,16 +59,16 @@ static int add_munmap(unsigned long addr, unsigned long len,
struct host_vm_op *last;
int ret = 0;
- if(*index != -1){
+ if (*index != -1) {
last = &ops[*index];
- if((last->type == MUNMAP) &&
- (last->u.munmap.addr + last->u.mmap.len == addr)){
+ if ((last->type == MUNMAP) &&
+ (last->u.munmap.addr + last->u.mmap.len == addr)) {
last->u.munmap.len += len;
return 0;
}
}
- if(*index == last_filled){
+ if (*index == last_filled) {
ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
*index = -1;
}
@@ -92,17 +89,17 @@ static int add_mprotect(unsigned long addr, unsigned long len,
struct host_vm_op *last;
int ret = 0;
- if(*index != -1){
+ if (*index != -1) {
last = &ops[*index];
- if((last->type == MPROTECT) &&
+ if ((last->type == MPROTECT) &&
(last->u.mprotect.addr + last->u.mprotect.len == addr) &&
- (last->u.mprotect.prot == prot)){
+ (last->u.mprotect.prot == prot)) {
last->u.mprotect.len += len;
return 0;
}
}
- if(*index == last_filled){
+ if (*index == last_filled) {
ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
*index = -1;
}
@@ -141,15 +138,15 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
}
prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
(x ? UM_PROT_EXEC : 0));
- if(force || pte_newpage(*pte)){
- if(pte_present(*pte))
+ if (force || pte_newpage(*pte)) {
+ if (pte_present(*pte))
ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
PAGE_SIZE, prot, ops, op_index,
last_op, mmu, flush, do_ops);
else ret = add_munmap(addr, PAGE_SIZE, ops, op_index,
last_op, mmu, flush, do_ops);
}
- else if(pte_newprot(*pte))
+ else if (pte_newprot(*pte))
ret = add_mprotect(addr, PAGE_SIZE, prot, ops, op_index,
last_op, mmu, flush, do_ops);
*pte = pte_mkuptodate(*pte);
@@ -172,8 +169,8 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr,
pmd = pmd_offset(pud, addr);
do {
next = pmd_addr_end(addr, end);
- if(!pmd_present(*pmd)){
- if(force || pmd_newpage(*pmd)){
+ if (!pmd_present(*pmd)) {
+ if (force || pmd_newpage(*pmd)) {
ret = add_munmap(addr, next - addr, ops,
op_index, last_op, mmu,
flush, do_ops);
@@ -202,8 +199,8 @@ static inline int update_pud_range(pgd_t *pgd, unsigned long addr,
pud = pud_offset(pgd, addr);
do {
next = pud_addr_end(addr, end);
- if(!pud_present(*pud)){
- if(force || pud_newpage(*pud)){
+ if (!pud_present(*pud)) {
+ if (force || pud_newpage(*pud)) {
ret = add_munmap(addr, next - addr, ops,
op_index, last_op, mmu,
flush, do_ops);
@@ -233,8 +230,8 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
pgd = pgd_offset(mm, addr);
do {
next = pgd_addr_end(addr, end_addr);
- if(!pgd_present(*pgd)){
- if (force || pgd_newpage(*pgd)){
+ if (!pgd_present(*pgd)) {
+ if (force || pgd_newpage(*pgd)) {
ret = add_munmap(addr, next - addr, ops,
&op_index, last_op, mmu,
&flush, do_ops);
@@ -246,12 +243,13 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
do_ops);
} while (pgd++, addr = next, ((addr != end_addr) && !ret));
- if(!ret)
+ if (!ret)
ret = (*do_ops)(mmu, ops, op_index, 1, &flush);
/* This is not an else because ret is modified above */
- if(ret) {
- printk("fix_range_common: failed, killing current process\n");
+ if (ret) {
+ printk(KERN_ERR "fix_range_common: failed, killing current "
+ "process\n");
force_sig(SIGKILL, current);
}
}
@@ -267,17 +265,17 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
int updated = 0, err;
mm = &init_mm;
- for(addr = start; addr < end;){
+ for (addr = start; addr < end;) {
pgd = pgd_offset(mm, addr);
- if(!pgd_present(*pgd)){
+ if (!pgd_present(*pgd)) {
last = ADD_ROUND(addr, PGDIR_SIZE);
- if(last > end)
+ if (last > end)
last = end;
- if(pgd_newpage(*pgd)){
+ if (pgd_newpage(*pgd)) {
updated = 1;
err = os_unmap_memory((void *) addr,
last - addr);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
}
@@ -286,15 +284,15 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
}
pud = pud_offset(pgd, addr);
- if(!pud_present(*pud)){
+ if (!pud_present(*pud)) {
last = ADD_ROUND(addr, PUD_SIZE);
- if(last > end)
+ if (last > end)
last = end;
- if(pud_newpage(*pud)){
+ if (pud_newpage(*pud)) {
updated = 1;
err = os_unmap_memory((void *) addr,
last - addr);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
}
@@ -303,15 +301,15 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
}
pmd = pmd_offset(pud, addr);
- if(!pmd_present(*pmd)){
+ if (!pmd_present(*pmd)) {
last = ADD_ROUND(addr, PMD_SIZE);
- if(last > end)
+ if (last > end)
last = end;
- if(pmd_newpage(*pmd)){
+ if (pmd_newpage(*pmd)) {
updated = 1;
err = os_unmap_memory((void *) addr,
last - addr);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
}
@@ -320,25 +318,25 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
}
pte = pte_offset_kernel(pmd, addr);
- if(!pte_present(*pte) || pte_newpage(*pte)){
+ if (!pte_present(*pte) || pte_newpage(*pte)) {
updated = 1;
err = os_unmap_memory((void *) addr,
PAGE_SIZE);
- if(err < 0)
+ if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
- if(pte_present(*pte))
+ if (pte_present(*pte))
map_memory(addr,
pte_val(*pte) & PAGE_MASK,
PAGE_SIZE, 1, 1, 1);
}
- else if(pte_newprot(*pte)){
+ else if (pte_newprot(*pte)) {
updated = 1;
os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
}
addr += PAGE_SIZE;
}
- return(updated);
+ return updated;
}
void 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)
address &= PAGE_MASK;
pgd = pgd_offset(mm, address);
- if(!pgd_present(*pgd))
+ if (!pgd_present(*pgd))
goto kill;
pud = pud_offset(pgd, address);
- if(!pud_present(*pud))
+ if (!pud_present(*pud))
goto kill;
pmd = pmd_offset(pud, address);
- if(!pmd_present(*pmd))
+ if (!pmd_present(*pmd))
goto kill;
pte = pte_offset_kernel(pmd, address);
@@ -380,8 +378,8 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
mm_id = &mm->context.skas.id;
prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
(x ? UM_PROT_EXEC : 0));
- if(pte_newpage(*pte)){
- if(pte_present(*pte)){
+ if (pte_newpage(*pte)) {
+ if (pte_present(*pte)) {
unsigned long long offset;
int fd;
@@ -391,10 +389,10 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
}
else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush);
}
- else if(pte_newprot(*pte))
+ else if (pte_newprot(*pte))
err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush);
- if(err)
+ if (err)
goto kill;
*pte = pte_mkuptodate(*pte);
@@ -402,28 +400,28 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
return;
kill:
- printk("Failed to flush page for address 0x%lx\n", address);
+ printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address);
force_sig(SIGKILL, current);
}
pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
{
- return(pgd_offset(mm, address));
+ return pgd_offset(mm, address);
}
pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address)
{
- return(pud_offset(pgd, address));
+ return pud_offset(pgd, address);
}
pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address)
{
- return(pmd_offset(pud, address));
+ return pmd_offset(pud, address);
}
pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address)
{
- return(pte_offset_kernel(pmd, address));
+ return pte_offset_kernel(pmd, address);
}
pte_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)
pud_t *pud = pud_offset(pgd, addr);
pmd_t *pmd = pmd_offset(pud, addr);
- return(pte_offset_map(pmd, addr));
+ return pte_offset_map(pmd, addr);
}
void flush_tlb_all(void)
@@ -452,18 +450,18 @@ void flush_tlb_kernel_vm(void)
void __flush_tlb_one(unsigned long addr)
{
- flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
+ flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
}
static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
int finished, void **flush)
{
struct host_vm_op *op;
- int i, ret = 0;
+ int i, ret = 0;
- for(i = 0; i <= last && !ret; i++){
- op = &ops[i];
- switch(op->type){
+ for (i = 0; i <= last && !ret; i++) {
+ op = &ops[i];
+ switch(op->type) {
case MMAP:
ret = map(&mmu->skas.id, op->u.mmap.addr,
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,
finished, flush);
break;
default:
- printk("Unknown op type %d in do_ops\n", op->type);
+ printk(KERN_ERR "Unknown op type %d in do_ops\n",
+ op->type);
break;
}
}
@@ -491,32 +490,33 @@ static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
static void fix_range(struct mm_struct *mm, unsigned long start_addr,
unsigned long end_addr, int force)
{
- if(!proc_mm && (end_addr > CONFIG_STUB_START))
- end_addr = CONFIG_STUB_START;
+ if (!proc_mm && (end_addr > CONFIG_STUB_START))
+ end_addr = CONFIG_STUB_START;
- fix_range_common(mm, start_addr, end_addr, force, do_ops);
+ fix_range_common(mm, start_addr, end_addr, force, do_ops);
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
- if(vma->vm_mm == NULL)
- flush_tlb_kernel_range_common(start, end);
- else fix_range(vma->vm_mm, start, end, 0);
+ if (vma->vm_mm == NULL)
+ flush_tlb_kernel_range_common(start, end);
+ else fix_range(vma->vm_mm, start, end, 0);
}
void flush_tlb_mm(struct mm_struct *mm)
{
unsigned long end;
- /* Don't bother flushing if this address space is about to be
- * destroyed.
- */
- if(atomic_read(&mm->mm_users) == 0)
- return;
+ /*
+ * Don't bother flushing if this address space is about to be
+ * destroyed.
+ */
+ if (atomic_read(&mm->mm_users) == 0)
+ return;
end = proc_mm ? task_size : CONFIG_STUB_START;
- fix_range(mm, 0, end, 0);
+ fix_range(mm, 0, end, 0);
}
void force_flush_all(void)
@@ -524,7 +524,7 @@ void force_flush_all(void)
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma = mm->mmap;
- while(vma != NULL) {
+ while (vma != NULL) {
fix_range(mm, vma->vm_start, vma->vm_end, 1);
vma = vma->vm_next;
}
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 5f3e13c365e..1993e5e1225 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -1,39 +1,22 @@
/*
- * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/kernel.h"
-#include "linux/sched.h"
-#include "linux/notifier.h"
-#include "linux/mm.h"
-#include "linux/types.h"
-#include "linux/tty.h"
-#include "linux/init.h"
-#include "linux/bootmem.h"
-#include "linux/spinlock.h"
-#include "linux/utsname.h"
-#include "linux/sysrq.h"
-#include "linux/seq_file.h"
#include "linux/delay.h"
+#include "linux/mm.h"
#include "linux/module.h"
+#include "linux/seq_file.h"
+#include "linux/string.h"
#include "linux/utsname.h"
-#include "asm/page.h"
#include "asm/pgtable.h"
-#include "asm/ptrace.h"
-#include "asm/elf.h"
-#include "asm/user.h"
+#include "asm/processor.h"
#include "asm/setup.h"
-#include "ubd_user.h"
-#include "asm/current.h"
-#include "kern_util.h"
-#include "as-layout.h"
#include "arch.h"
+#include "as-layout.h"
+#include "init.h"
#include "kern.h"
#include "mem_user.h"
-#include "mem.h"
-#include "initrd.h"
-#include "init.h"
#include "os.h"
#include "skas.h"
@@ -48,7 +31,7 @@ static void __init add_arg(char *arg)
printf("add_arg: Too many command line arguments!\n");
exit(1);
}
- if(strlen(command_line) > 0)
+ if (strlen(command_line) > 0)
strcat(command_line, " ");
strcat(command_line, arg);
}
@@ -133,7 +116,7 @@ static int have_root __initdata = 0;
/* Set in uml_mem_setup and modified in linux_main */
long long physmem_size = 32 * 1024 * 1024;
-static char *usage_string =
+static char *usage_string =
"User Mode Linux v%s\n"
" available at http://user-mode-linux.sourceforge.net/\n\n";
@@ -191,7 +174,7 @@ static int __init uml_ncpus_setup(char *line, int *add)
__uml_setup("ncpus=", uml_ncpus_setup,
"ncpus=<# of desired CPUs>\n"
-" This tells an SMP kernel how many virtual processors to start.\n\n"
+" This tells an SMP kernel how many virtual processors to start.\n\n"
);
#endif
@@ -223,9 +206,8 @@ static int __init uml_checksetup(char *line, int *add)
int n;
n = strlen(p->str);
- if(!strncmp(line, p->str, n)){
- if (p->setup_func(line + n, add)) return 1;
- }
+ if (!strncmp(line, p->str, n) && p->setup_func(line + n, add))
+ return 1;
p++;
}
return 0;
@@ -236,7 +218,7 @@ static void __init uml_postsetup(void)
initcall_t *p;
p = &__uml_postsetup_start;
- while(p < &__uml_postsetup_end){
+ while(p < &__uml_postsetup_end) {
(*p)();
p++;
}
@@ -272,16 +254,18 @@ int __init linux_main(int argc, char **argv)
unsigned int i, add;
char * mode;
- for (i = 1; i < argc; i++){
- if((i == 1) && (argv[i][0] == ' ')) continue;
+ for (i = 1; i < argc; i++) {
+ if ((i == 1) && (argv[i][0] == ' '))
+ continue;
add = 1;
uml_checksetup(argv[i], &add);
if (add)
add_arg(argv[i]);
}
- if(have_root == 0)
+ if (have_root == 0)
add_arg(DEFAULT_COMMAND_LINE);
+ /* OS sanity checks that need to happen before the kernel runs */
os_early_checks();
can_do_skas();
@@ -302,12 +286,14 @@ int __init linux_main(int argc, char **argv)
brk_start = (unsigned long) sbrk(0);
- /* Increase physical memory size for exec-shield users
- so they actually get what they asked for. This should
- add zero for non-exec shield users */
+ /*
+ * Increase physical memory size for exec-shield users
+ * so they actually get what they asked for. This should
+ * add zero for non-exec shield users
+ */
diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
- if(diff > 1024 * 1024){
+ if (diff > 1024 * 1024) {
printf("Adding %ld bytes to physical memory to account for "
"exec-shield gap\n", diff);
physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
@@ -324,11 +310,12 @@ int __init linux_main(int argc, char **argv)
iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC;
- /* Zones have to begin on a 1 << MAX_ORDER page boundary,
+ /*
+ * Zones have to begin on a 1 << MAX_ORDER page boundary,
* so this makes sure that's true for highmem
*/
max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1);
- if(physmem_size + iomem_size > max_physmem){
+ if (physmem_size + iomem_size > max_physmem) {
highmem = physmem_size + iomem_size - max_physmem;
physmem_size -= highmem;
#ifndef CONFIG_HIGHMEM
@@ -345,7 +332,7 @@ int __init linux_main(int argc, char **argv)
start_vm = VMALLOC_START;
setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
- if(init_maps(physmem_size, iomem_size, highmem)){
+ if (init_maps(physmem_size, iomem_size, highmem)) {
printf("Failed to allocate mem_map for %Lu bytes of physical "
"memory and %Lu bytes of highmem\n", physmem_size,
highmem);
@@ -354,10 +341,11 @@ int __init linux_main(int argc, char **argv)
virtmem_size = physmem_size;
avail = get_kmem_end() - start_vm;
- if(physmem_size > avail) virtmem_size = avail;
+ if (physmem_size > avail)
+ virtmem_size = avail;
end_vm = start_vm + virtmem_size;
- if(virtmem_size < physmem_size)
+ if (virtmem_size < physmem_size)
printf("Kernel virtual memory size shrunk to %lu bytes\n",
virtmem_size);
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 07:07:07 +0000