summaryrefslogtreecommitdiff
path: root/arch/um/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/kernel')
-rw-r--r--arch/um/kernel/exec.c5
-rw-r--r--arch/um/kernel/exitcode.c31
-rw-r--r--arch/um/kernel/gmon_syms.c11
-rw-r--r--arch/um/kernel/gprof_syms.c13
-rw-r--r--arch/um/kernel/initrd.c30
-rw-r--r--arch/um/kernel/irq.c6
-rw-r--r--arch/um/kernel/ksyms.c7
-rw-r--r--arch/um/kernel/mem.c151
-rw-r--r--arch/um/kernel/physmem.c16
-rw-r--r--arch/um/kernel/process.c158
-rw-r--r--arch/um/kernel/reboot.c7
-rw-r--r--arch/um/kernel/sigio.c18
-rw-r--r--arch/um/kernel/signal.c16
-rw-r--r--arch/um/kernel/skas/clone.c32
-rw-r--r--arch/um/kernel/skas/mmu.c132
-rw-r--r--arch/um/kernel/skas/process.c20
-rw-r--r--arch/um/kernel/skas/syscall.c6
-rw-r--r--arch/um/kernel/skas/uaccess.c140
-rw-r--r--arch/um/kernel/smp.c14
-rw-r--r--arch/um/kernel/syscall.c3
-rw-r--r--arch/um/kernel/sysrq.c44
-rw-r--r--arch/um/kernel/time.c14
-rw-r--r--arch/um/kernel/tlb.c51
-rw-r--r--arch/um/kernel/trap.c33
-rw-r--r--arch/um/kernel/uaccess.c11
-rw-r--r--arch/um/kernel/um_arch.c112
-rw-r--r--arch/um/kernel/umid.c15
27 files changed, 562 insertions, 534 deletions
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index 8196450451c..f5d7f4569ba 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -19,12 +19,13 @@
void flush_thread(void)
{
void *data = NULL;
- unsigned long end = proc_mm ? task_size : STUB_START;
int ret;
arch_flush_thread(&current->thread.arch);
- ret = unmap(&current->mm->context.id, 0, end, 1, &data);
+ ret = unmap(&current->mm->context.id, 0, STUB_START, 0, &data);
+ ret = ret || unmap(&current->mm->context.id, STUB_END,
+ host_task_size - STUB_END, 1, &data);
if (ret) {
printk(KERN_ERR "flush_thread - clearing address space failed, "
"err = %d\n", ret);
diff --git a/arch/um/kernel/exitcode.c b/arch/um/kernel/exitcode.c
index c716b5a6db1..984f80e668c 100644
--- a/arch/um/kernel/exitcode.c
+++ b/arch/um/kernel/exitcode.c
@@ -1,15 +1,17 @@
/*
- * 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/kernel.h"
-#include "linux/init.h"
-#include "linux/ctype.h"
-#include "linux/proc_fs.h"
-#include "asm/uaccess.h"
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
-/* If read and write race, the read will still atomically read a valid
+/*
+ * If read and write race, the read will still atomically read a valid
* value.
*/
int uml_exitcode = 0;
@@ -19,18 +21,19 @@ static int read_proc_exitcode(char *page, char **start, off_t off,
{
int len, val;
- /* Save uml_exitcode in a local so that we don't need to guarantee
+ /*
+ * Save uml_exitcode in a local so that we don't need to guarantee
* that sprintf accesses it atomically.
*/
val = uml_exitcode;
len = sprintf(page, "%d\n", val);
len -= off;
- if(len <= off+count)
+ if (len <= off+count)
*eof = 1;
*start = page + off;
- if(len > count)
+ if (len > count)
len = count;
- if(len < 0)
+ if (len < 0)
len = 0;
return len;
}
@@ -41,11 +44,11 @@ static int write_proc_exitcode(struct file *file, const char __user *buffer,
char *end, buf[sizeof("nnnnn\0")];
int tmp;
- if(copy_from_user(buf, buffer, count))
+ if (copy_from_user(buf, buffer, count))
return -EFAULT;
tmp = simple_strtol(buf, &end, 0);
- if((*end != '\0') && !isspace(*end))
+ if ((*end != '\0') && !isspace(*end))
return -EINVAL;
uml_exitcode = tmp;
@@ -57,7 +60,7 @@ static int make_proc_exitcode(void)
struct proc_dir_entry *ent;
ent = create_proc_entry("exitcode", 0600, &proc_root);
- if(ent == NULL){
+ if (ent == NULL) {
printk(KERN_WARNING "make_proc_exitcode : Failed to register "
"/proc/exitcode\n");
return 0;
diff --git a/arch/um/kernel/gmon_syms.c b/arch/um/kernel/gmon_syms.c
index 734f873cab1..72eccd2a411 100644
--- a/arch/um/kernel/gmon_syms.c
+++ b/arch/um/kernel/gmon_syms.c
@@ -1,5 +1,5 @@
-/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -8,12 +8,13 @@
extern void __bb_init_func(void *) __attribute__((weak));
EXPORT_SYMBOL(__bb_init_func);
-/* This is defined (and referred to in profiling stub code) only by some GCC
+/*
+ * This is defined (and referred to in profiling stub code) only by some GCC
* versions in libgcov.
*
* Since SuSE backported the fix, we cannot handle it depending on GCC version.
- * So, unconditionally export it. But also give it a weak declaration, which will
- * be overridden by any other one.
+ * So, unconditionally export it. But also give it a weak declaration, which
+ * will be overridden by any other one.
*/
extern void __gcov_init(void *) __attribute__((weak));
diff --git a/arch/um/kernel/gprof_syms.c b/arch/um/kernel/gprof_syms.c
index 9244f018d44..e2f043d0de6 100644
--- a/arch/um/kernel/gprof_syms.c
+++ b/arch/um/kernel/gprof_syms.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -7,14 +7,3 @@
extern void mcount(void);
EXPORT_SYMBOL(mcount);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/initrd.c b/arch/um/kernel/initrd.c
index 16dc43e9d94..fa015565001 100644
--- a/arch/um/kernel/initrd.c
+++ b/arch/um/kernel/initrd.c
@@ -1,5 +1,5 @@
/*
- * 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
*/
@@ -7,7 +7,6 @@
#include "linux/bootmem.h"
#include "linux/initrd.h"
#include "asm/types.h"
-#include "kern_util.h"
#include "initrd.h"
#include "init.h"
#include "os.h"
@@ -21,18 +20,27 @@ static int __init read_initrd(void)
long long size;
int err;
- if(initrd == NULL)
+ if (initrd == NULL)
return 0;
err = os_file_size(initrd, &size);
- if(err)
+ if (err)
return 0;
+ /*
+ * This is necessary because alloc_bootmem craps out if you
+ * ask for no memory.
+ */
+ if (size == 0) {
+ printk(KERN_ERR "\"%\" is a zero-size initrd\n");
+ return 0;
+ }
+
area = alloc_bootmem(size);
- if(area == NULL)
+ if (area == NULL)
return 0;
- if(load_initrd(initrd, area, size) == -1)
+ if (load_initrd(initrd, area, size) == -1)
return 0;
initrd_start = (unsigned long) area;
@@ -59,13 +67,15 @@ int load_initrd(char *filename, void *buf, int size)
int fd, n;
fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
- if(fd < 0){
- printk("Opening '%s' failed - err = %d\n", filename, -fd);
+ if (fd < 0) {
+ printk(KERN_ERR "Opening '%s' failed - err = %d\n", filename,
+ -fd);
return -1;
}
n = os_read_file(fd, buf, size);
- if(n != size){
- printk("Read of %d bytes from '%s' failed, err = %d\n", size,
+ if (n != size) {
+ printk(KERN_ERR "Read of %d bytes from '%s' failed, "
+ "err = %d\n", size,
filename, -n);
return -1;
}
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index ba11ccd6a8a..91587f8db34 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -107,10 +107,9 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
struct pollfd *tmp_pfd;
struct irq_fd *new_fd, *irq_fd;
unsigned long flags;
- int pid, events, err, n;
+ int events, err, n;
- pid = os_getpid();
- err = os_set_fd_async(fd, pid);
+ err = os_set_fd_async(fd);
if (err < 0)
goto out;
@@ -127,7 +126,6 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
.fd = fd,
.type = type,
.irq = irq,
- .pid = pid,
.events = events,
.current_events = 0 } );
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 7c7142ba3bd..66e2a305a8d 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -5,7 +5,6 @@
#include "linux/module.h"
#include "linux/syscalls.h"
-#include "asm/a.out.h"
#include "asm/tlbflush.h"
#include "asm/uaccess.h"
#include "as-layout.h"
@@ -18,15 +17,11 @@ EXPORT_SYMBOL(set_signals);
EXPORT_SYMBOL(get_signals);
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(sys_waitpid);
-EXPORT_SYMBOL(task_size);
EXPORT_SYMBOL(flush_tlb_range);
-EXPORT_SYMBOL(host_task_size);
EXPORT_SYMBOL(arch_validate);
-EXPORT_SYMBOL(get_kmem_end);
EXPORT_SYMBOL(high_physmem);
EXPORT_SYMBOL(empty_zero_page);
-EXPORT_SYMBOL(um_virt_to_phys);
EXPORT_SYMBOL(handle_page_fault);
EXPORT_SYMBOL(find_iomem);
@@ -40,7 +35,6 @@ EXPORT_SYMBOL(uml_strdup);
EXPORT_SYMBOL(os_stat_fd);
EXPORT_SYMBOL(os_stat_file);
EXPORT_SYMBOL(os_access);
-EXPORT_SYMBOL(os_get_exec_close);
EXPORT_SYMBOL(os_set_exec_close);
EXPORT_SYMBOL(os_getpid);
EXPORT_SYMBOL(os_open_file);
@@ -65,7 +59,6 @@ EXPORT_SYMBOL(os_accept_connection);
EXPORT_SYMBOL(os_rcv_fd);
EXPORT_SYMBOL(run_helper);
EXPORT_SYMBOL(start_thread);
-EXPORT_SYMBOL(dump_thread);
#ifdef CONFIG_SMP
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 59822dee438..2627ce82e91 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -1,49 +1,41 @@
/*
- * 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/stddef.h"
-#include "linux/kernel.h"
-#include "linux/mm.h"
-#include "linux/bootmem.h"
-#include "linux/swap.h"
-#include "linux/highmem.h"
-#include "linux/gfp.h"
-#include "asm/page.h"
-#include "asm/fixmap.h"
-#include "asm/pgalloc.h"
-#include "kern_util.h"
+#include <linux/stddef.h>
+#include <linux/bootmem.h>
+#include <linux/gfp.h>
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <asm/fixmap.h>
+#include <asm/page.h>
#include "as-layout.h"
+#include "init.h"
#include "kern.h"
+#include "kern_util.h"
#include "mem_user.h"
-#include "um_uaccess.h"
#include "os.h"
-#include "linux/types.h"
-#include "linux/string.h"
-#include "init.h"
-#include "kern_constants.h"
/* allocated in paging_init, zeroed in mem_init, and unchanged thereafter */
unsigned long *empty_zero_page = NULL;
/* allocated in paging_init and unchanged thereafter */
unsigned long *empty_bad_page = NULL;
+
+/*
+ * Initialized during boot, and readonly for initializing page tables
+ * afterwards
+ */
pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
+/* Initialized at boot time, and readonly after that */
unsigned long long highmem;
int kmalloc_ok = 0;
+/* Used during early boot */
static unsigned long brk_end;
-void unmap_physmem(void)
-{
- os_unmap_memory((void *) brk_end, uml_reserved - brk_end);
-}
-
-static void map_cb(void *unused)
-{
- map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
-}
-
#ifdef CONFIG_HIGHMEM
static void setup_highmem(unsigned long highmem_start,
unsigned long highmem_len)
@@ -53,7 +45,7 @@ static void setup_highmem(unsigned long highmem_start,
int i;
highmem_pfn = __pa(highmem_start) >> PAGE_SHIFT;
- for(i = 0; i < highmem_len >> PAGE_SHIFT; i++){
+ for (i = 0; i < highmem_len >> PAGE_SHIFT; i++) {
page = &mem_map[highmem_pfn + i];
ClearPageReserved(page);
init_page_count(page);
@@ -65,14 +57,13 @@ static void setup_highmem(unsigned long highmem_start,
void __init mem_init(void)
{
/* clear the zero-page */
- memset((void *) empty_zero_page, 0, PAGE_SIZE);
+ memset(empty_zero_page, 0, PAGE_SIZE);
/* Map in the area just after the brk now that kmalloc is about
* to be turned on.
*/
brk_end = (unsigned long) UML_ROUND_UP(sbrk(0));
- map_cb(NULL);
- initial_thread_cb(map_cb, NULL);
+ map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
free_bootmem(__pa(brk_end), uml_reserved - brk_end);
uml_reserved = brk_end;
@@ -85,7 +76,7 @@ void __init mem_init(void)
#endif
num_physpages = totalram_pages;
max_pfn = totalram_pages;
- printk(KERN_INFO "Memory: %luk available\n",
+ printk(KERN_INFO "Memory: %luk available\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10));
kmalloc_ok = 1;
@@ -119,7 +110,7 @@ static void __init one_md_table_init(pud_t *pud)
#endif
}
-static void __init fixrange_init(unsigned long start, unsigned long end,
+static void __init fixrange_init(unsigned long start, unsigned long end,
pgd_t *pgd_base)
{
pgd_t *pgd;
@@ -138,7 +129,7 @@ static void __init fixrange_init(unsigned long start, unsigned long end,
if (pud_none(*pud))
one_md_table_init(pud);
pmd = pmd_offset(pud, vaddr);
- for (; (j < PTRS_PER_PMD) && (vaddr != end); pmd++, j++) {
+ for (; (j < PTRS_PER_PMD) && (vaddr < end); pmd++, j++) {
one_page_table_init(pmd);
vaddr += PMD_SIZE;
}
@@ -152,7 +143,7 @@ pgprot_t kmap_prot;
#define kmap_get_fixmap_pte(vaddr) \
pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)),\
- (vaddr)), (vaddr))
+ (vaddr)), (vaddr))
static void __init kmap_init(void)
{
@@ -197,21 +188,23 @@ static void __init fixaddr_user_init( void)
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
- unsigned long paddr, vaddr = FIXADDR_USER_START;
+ phys_t p;
+ unsigned long v, vaddr = FIXADDR_USER_START;
- if ( ! size )
+ if (!size)
return;
fixrange_init( FIXADDR_USER_START, FIXADDR_USER_END, swapper_pg_dir);
- paddr = (unsigned long)alloc_bootmem_low_pages( size);
- memcpy( (void *)paddr, (void *)FIXADDR_USER_START, size);
- paddr = __pa(paddr);
- for ( ; size > 0; size-=PAGE_SIZE, vaddr+=PAGE_SIZE, paddr+=PAGE_SIZE){
+ v = (unsigned long) alloc_bootmem_low_pages(size);
+ memcpy((void *) v , (void *) FIXADDR_USER_START, size);
+ p = __pa(v);
+ for ( ; size > 0; size -= PAGE_SIZE, vaddr += PAGE_SIZE,
+ p += PAGE_SIZE) {
pgd = swapper_pg_dir + pgd_index(vaddr);
pud = pud_offset(pgd, vaddr);
pmd = pmd_offset(pud, vaddr);
pte = pte_offset_kernel(pmd, vaddr);
- pte_set_val( (*pte), paddr, PAGE_READONLY);
+ pte_set_val(*pte, p, PAGE_READONLY);
}
#endif
}
@@ -223,7 +216,7 @@ void __init paging_init(void)
empty_zero_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
- for(i = 0; i < ARRAY_SIZE(zones_size); i++)
+ for (i = 0; i < ARRAY_SIZE(zones_size); i++)
zones_size[i] = 0;
zones_size[ZONE_NORMAL] = (end_iomem >> PAGE_SHIFT) -
@@ -253,32 +246,33 @@ struct page *arch_validate(struct page *page, gfp_t mask, int order)
int i;
again:
- if(page == NULL)
+ if (page == NULL)
return page;
- if(PageHighMem(page))
+ if (PageHighMem(page))
return page;
addr = (unsigned long) page_address(page);
- for(i = 0; i < (1 << order); i++){
+ for (i = 0; i < (1 << order); i++) {
current->thread.fault_addr = (void *) addr;
- if(__do_copy_to_user((void __user *) addr, &zero,
+ if (__do_copy_to_user((void __user *) addr, &zero,
sizeof(zero),
&current->thread.fault_addr,
- &current->thread.fault_catcher)){
- if(!(mask & __GFP_WAIT))
+ &current->thread.fault_catcher)) {
+ if (!(mask & __GFP_WAIT))
return NULL;
else break;
}
addr += PAGE_SIZE;
}
- if(i == (1 << order))
+ if (i == (1 << order))
return page;
page = alloc_pages(mask, order);
goto again;
}
-/* This can't do anything because nothing in the kernel image can be freed
+/*
+ * This can't do anything because nothing in the kernel image can be freed
* since it's not in kernel physical memory.
*/
@@ -290,8 +284,8 @@ void free_initmem(void)
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (start < end)
- printk ("Freeing initrd memory: %ldk freed\n",
- (end - start) >> 10);
+ printk(KERN_INFO "Freeing initrd memory: %ldk freed\n",
+ (end - start) >> 10);
for (; start < end; start += PAGE_SIZE) {
ClearPageReserved(virt_to_page(start));
init_page_count(virt_to_page(start));
@@ -308,32 +302,31 @@ void show_mem(void)
int highmem = 0;
struct page *page;
- printk("Mem-info:\n");
+ printk(KERN_INFO "Mem-info:\n");
show_free_areas();
- printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+ printk(KERN_INFO "Free swap: %6ldkB\n",
+ nr_swap_pages<<(PAGE_SHIFT-10));
pfn = max_mapnr;
- while(pfn-- > 0) {
+ while (pfn-- > 0) {
page = pfn_to_page(pfn);
total++;
- if(PageHighMem(page))
+ if (PageHighMem(page))
highmem++;
- if(PageReserved(page))
+ if (PageReserved(page))
reserved++;
- else if(PageSwapCache(page))
+ else if (PageSwapCache(page))
cached++;
- else if(page_count(page))
+ else if (page_count(page))
shared += page_count(page) - 1;
}
- printk("%d pages of RAM\n", total);
- printk("%d pages of HIGHMEM\n", highmem);
- printk("%d reserved pages\n", reserved);
- printk("%d pages shared\n", shared);
- printk("%d pages swap cached\n", cached);
+ printk(KERN_INFO "%d pages of RAM\n", total);
+ printk(KERN_INFO "%d pages of HIGHMEM\n", highmem);
+ printk(KERN_INFO "%d reserved pages\n", reserved);
+ printk(KERN_INFO "%d pages shared\n", shared);
+ printk(KERN_INFO "%d pages swap cached\n", cached);
}
-/*
- * Allocate and free page tables.
- */
+/* Allocate and free page tables. */
pgd_t *pgd_alloc(struct mm_struct *mm)
{
@@ -341,14 +334,14 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
if (pgd) {
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
- memcpy(pgd + USER_PTRS_PER_PGD,
- swapper_pg_dir + USER_PTRS_PER_PGD,
+ memcpy(pgd + USER_PTRS_PER_PGD,
+ swapper_pg_dir + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}
return pgd;
}
-void pgd_free(pgd_t *pgd)
+void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long) pgd);
}
@@ -361,10 +354,24 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
return pte;
}
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+ if (pte)
+ pgtable_page_ctor(pte);
return pte;
}
+
+#ifdef CONFIG_3_LEVEL_PGTABLES
+pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
+
+ if (pmd)
+ memset(pmd, 0, PAGE_SIZE);
+
+ return pmd;
+}
+#endif
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index e66432f4248..9757085a022 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -55,16 +55,6 @@ int __init init_maps(unsigned long physmem, unsigned long iomem,
return 0;
}
-/* Changed during early boot */
-static unsigned long kmem_top = 0;
-
-unsigned long get_kmem_end(void)
-{
- if (kmem_top == 0)
- kmem_top = host_task_size - 1024 * 1024;
- return kmem_top;
-}
-
void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
int r, int w, int x)
{
@@ -174,10 +164,10 @@ __uml_setup("iomem=", parse_iomem,
* setup_iomem, both of which run during early boot. Afterwards, it's
* unchanged.
*/
-struct iomem_region *iomem_regions = NULL;
+struct iomem_region *iomem_regions;
-/* Initialized in parse_iomem */
-int iomem_size = 0;
+/* Initialized in parse_iomem and unchanged thereafter */
+int iomem_size;
unsigned long find_iomem(char *driver, unsigned long *len_out)
{
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 0eae00b3e58..fc50d2f959d 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -4,19 +4,21 @@
* Licensed under the GPL
*/
-#include "linux/stddef.h"
-#include "linux/err.h"
-#include "linux/hardirq.h"
-#include "linux/mm.h"
-#include "linux/personality.h"
-#include "linux/proc_fs.h"
-#include "linux/ptrace.h"
-#include "linux/random.h"
-#include "linux/sched.h"
-#include "linux/tick.h"
-#include "linux/threads.h"
-#include "asm/pgtable.h"
-#include "asm/uaccess.h"
+#include <linux/stddef.h>
+#include <linux/err.h>
+#include <linux/hardirq.h>
+#include <linux/gfp.h>
+#include <linux/mm.h>
+#include <linux/personality.h>
+#include <linux/proc_fs.h>
+#include <linux/ptrace.h>
+#include <linux/random.h>
+#include <linux/sched.h>
+#include <linux/tick.h>
+#include <linux/threads.h>
+#include <asm/current.h>
+#include <asm/pgtable.h>
+#include <asm/uaccess.h>
#include "as-layout.h"
#include "kern_util.h"
#include "os.h"
@@ -30,7 +32,7 @@
*/
struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
-static inline int external_pid(struct task_struct *task)
+static inline int external_pid(void)
{
/* FIXME: Need to look up userspace_pid by cpu */
return userspace_pid[0];
@@ -40,7 +42,7 @@ int pid_to_processor_id(int pid)
{
int i;
- for(i = 0; i < ncpus; i++) {
+ for (i = 0; i < ncpus; i++) {
if (cpu_tasks[i].pid == pid)
return i;
}
@@ -60,8 +62,6 @@ unsigned long alloc_stack(int order, int atomic)
if (atomic)
flags = GFP_ATOMIC;
page = __get_free_pages(flags, order);
- if (page == 0)
- return 0;
return page;
}
@@ -80,15 +80,15 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
static inline void set_current(struct task_struct *task)
{
cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)
- { external_pid(task), task });
+ { external_pid(), task });
}
-extern void arch_switch_to(struct task_struct *from, struct task_struct *to);
+extern void arch_switch_to(struct task_struct *to);
void *_switch_to(void *prev, void *next, void *last)
{
struct task_struct *from = prev;
- struct task_struct *to= next;
+ struct task_struct *to = next;
to->thread.prev_sched = from;
set_current(to);
@@ -99,13 +99,13 @@ void *_switch_to(void *prev, void *next, void *last)
switch_threads(&from->thread.switch_buf,
&to->thread.switch_buf);
- arch_switch_to(current->thread.prev_sched, current);
+ arch_switch_to(current);
if (current->thread.saved_task)
show_regs(&(current->thread.regs));
- next= current->thread.saved_task;
- prev= current;
- } while(current->thread.saved_task);
+ to = current->thread.saved_task;
+ from = current;
+ } while (current->thread.saved_task);
return current->thread.prev_sched;
@@ -163,8 +163,6 @@ void new_thread_handler(void)
void fork_handler(void)
{
force_flush_all();
- if (current->thread.prev_sched == NULL)
- panic("blech");
schedule_tail(current->thread.prev_sched);
@@ -173,7 +171,7 @@ void fork_handler(void)
* arch_switch_to isn't needed. We could want to apply this to
* improve performance. -bb
*/
- arch_switch_to(current->thread.prev_sched, current);
+ arch_switch_to(current);
current->thread.prev_sched = NULL;
@@ -204,7 +202,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
arch_copy_thread(&current->thread.arch, &p->thread.arch);
}
else {
- init_thread_registers(&p->thread.regs.regs);
+ get_safe_registers(p->thread.regs.regs.gp);
p->thread.request.u.thread = current->thread.request.u.thread;
handler = new_thread_handler;
}
@@ -237,7 +235,7 @@ void default_idle(void)
{
unsigned long long nsecs;
- while(1) {
+ while (1) {
/* endless idle loop with no priority at all */
/*
@@ -256,57 +254,10 @@ void default_idle(void)
void cpu_idle(void)
{
- cpu_tasks[current_thread->cpu].pid = os_getpid();
+ cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
default_idle();
}
-void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
- pte_t *pte_out)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- pte_t ptent;
-
- if (task->mm == NULL)
- return ERR_PTR(-EINVAL);
- pgd = pgd_offset(task->mm, addr);
- if (!pgd_present(*pgd))
- return ERR_PTR(-EINVAL);
-
- pud = pud_offset(pgd, addr);
- if (!pud_present(*pud))
- return ERR_PTR(-EINVAL);
-
- pmd = pmd_offset(pud, addr);
- if (!pmd_present(*pmd))
- return ERR_PTR(-EINVAL);
-
- pte = pte_offset_kernel(pmd, addr);
- ptent = *pte;
- if (!pte_present(ptent))
- return ERR_PTR(-EINVAL);
-
- if (pte_out != NULL)
- *pte_out = ptent;
- return (void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK);
-}
-
-char *current_cmd(void)
-{
-#if defined(CONFIG_SMP) || defined(CONFIG_HIGHMEM)
- return "(Unknown)";
-#else
- void *addr = um_virt_to_phys(current, current->mm->arg_start, NULL);
- return IS_ERR(addr) ? "(Unknown)": __va((unsigned long) addr);
-#endif
-}
-
-void dump_thread(struct pt_regs *regs, struct user *u)
-{
-}
-
int __cant_sleep(void) {
return in_atomic() || irqs_disabled() || in_interrupt();
/* Is in_interrupt() really needed? */
@@ -317,7 +268,7 @@ int user_context(unsigned long sp)
unsigned long stack;
stack = sp & (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER);
- return stack != (unsigned long) current_thread;
+ return stack != (unsigned long) current_thread_info();
}
extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;
@@ -331,7 +282,7 @@ void do_uml_exitcalls(void)
(*call)();
}
-char *uml_strdup(char *string)
+char *uml_strdup(const char *string)
{
return kstrdup(string, GFP_KERNEL);
}
@@ -359,7 +310,7 @@ int strlen_user_proc(char __user *str)
int smp_sigio_handler(void)
{
#ifdef CONFIG_SMP
- int cpu = current_thread->cpu;
+ int cpu = current_thread_info()->cpu;
IPI_handler(cpu);
if (cpu != 0)
return 1;
@@ -369,7 +320,7 @@ int smp_sigio_handler(void)
int cpu(void)
{
- return current_thread->cpu;
+ return current_thread_info()->cpu;
}
static atomic_t using_sysemu = ATOMIC_INIT(0);
@@ -435,7 +386,7 @@ int singlestepping(void * t)
{
struct task_struct *task = t ? t : current;
- if ( ! (task->ptrace & PT_DTRACE) )
+ if (!(task->ptrace & PT_DTRACE))
return 0;
if (task->thread.singlestep_syscall)
@@ -459,3 +410,46 @@ unsigned long arch_align_stack(unsigned long sp)
return sp & ~0xf;
}
#endif
+
+unsigned long get_wchan(struct task_struct *p)
+{
+ unsigned long stack_page, sp, ip;
+ bool seen_sched = 0;
+
+ if ((p == NULL) || (p == current) || (p->state == TASK_RUNNING))
+ return 0;
+
+ stack_page = (unsigned long) task_stack_page(p);
+ /* Bail if the process has no kernel stack for some reason */
+ if (stack_page == 0)
+ return 0;
+
+ sp = p->thread.switch_buf->JB_SP;
+ /*
+ * Bail if the stack pointer is below the bottom of the kernel
+ * stack for some reason
+ */
+ if (sp < stack_page)
+ return 0;
+
+ while (sp < stack_page + THREAD_SIZE) {
+ ip = *((unsigned long *) sp);
+ if (in_sched_functions(ip))
+ /* Ignore everything until we're above the scheduler */
+ seen_sched = 1;
+ else if (kernel_text_address(ip) && seen_sched)
+ return ip;
+
+ sp += sizeof(unsigned long);
+ }
+
+ return 0;
+}
+
+int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
+{
+ int cpu = current_thread_info()->cpu;
+
+ return save_fp_registers(userspace_pid[cpu], (unsigned long *) fpu);
+}
+
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 04cebcf0679..00197d3d21e 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -4,6 +4,7 @@
*/
#include "linux/sched.h"
+#include "kern_util.h"
#include "os.h"
#include "skas.h"
@@ -11,7 +12,7 @@ void (*pm_power_off)(void);
static void kill_off_processes(void)
{
- if(proc_mm)
+ if (proc_mm)
/*
* FIXME: need to loop over userspace_pids
*/
@@ -21,8 +22,8 @@ static void kill_off_processes(void)
int pid, me;
me = os_getpid();
- for_each_process(p){
- if(p->mm == NULL)
+ for_each_process(p) {
+ if (p->mm == NULL)
continue;
pid = p->mm->context.id.u.pid;
diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c
index 89f9866a135..2b272b63b51 100644
--- a/arch/um/kernel/sigio.c
+++ b/arch/um/kernel/sigio.c
@@ -1,18 +1,12 @@
/*
- * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
* Licensed under the GPL
*/
-#include "linux/kernel.h"
-#include "linux/list.h"
-#include "linux/slab.h"
-#include "linux/signal.h"
-#include "linux/interrupt.h"
-#include "init.h"
-#include "sigio.h"
-#include "irq_user.h"
+#include <linux/interrupt.h>
#include "irq_kern.h"
#include "os.h"
+#include "sigio.h"
/* Protected by sigio_lock() called from write_sigio_workaround */
static int sigio_irq_fd = -1;
@@ -33,9 +27,9 @@ int write_sigio_irq(int fd)
err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt,
IRQF_DISABLED|IRQF_SAMPLE_RANDOM, "write sigio",
NULL);
- if(err){
- printk("write_sigio_irq : um_request_irq failed, err = %d\n",
- err);
+ if (err) {
+ printk(KERN_ERR "write_sigio_irq : um_request_irq failed, "
+ "err = %d\n", err);
return -1;
}
sigio_irq_fd = fd;
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index 19cb9773393..b0fce720c4d 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -3,12 +3,12 @@
* Licensed under the GPL
*/
-#include "linux/module.h"
-#include "linux/ptrace.h"
-#include "linux/sched.h"
-#include "asm/siginfo.h"
-#include "asm/signal.h"
-#include "asm/unistd.h"
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <asm/siginfo.h>
+#include <asm/signal.h>
+#include <asm/unistd.h>
#include "frame_kern.h"
#include "kern_util.h"
#include "sigcontext.h"
@@ -36,7 +36,7 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
/* Did we come from a system call? */
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;
@@ -116,7 +116,7 @@ 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)) {
/* 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:
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c
index 8d07a7acb90..2c8583c1a34 100644
--- a/arch/um/kernel/skas/clone.c
+++ b/arch/um/kernel/skas/clone.c
@@ -1,17 +1,20 @@
-#include <sched.h>
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
#include <signal.h>
-#include <sys/mman.h>
-#include <sys/time.h>
+#include <sched.h>
#include <asm/unistd.h>
+#include <sys/time.h>
#include "as-layout.h"
+#include "kern_constants.h"
#include "ptrace_user.h"
-#include "skas.h"
#include "stub-data.h"
-#include "uml-config.h"
#include "sysdep/stub.h"
-#include "kern_constants.h"
-/* This is in a separate file because it needs to be compiled with any
+/*
+ * This is in a separate file because it needs to be compiled with any
* extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
*
* Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize
@@ -26,25 +29,26 @@ stub_clone_handler(void)
err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *));
- if(err != 0)
+ if (err != 0)
goto out;
err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
- if(err)
+ if (err)
goto out;
- err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
+ err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
(long) &data->timer, 0);
- if(err)
+ if (err)
goto out;
remap_stack(data->fd, data->offset);
goto done;
out:
- /* save current result.
- * Parent: pid;
- * child: retcode of mmap already saved and it jumps around this
+ /*
+ * save current result.
+ * Parent: pid;
+ * child: retcode of mmap already saved and it jumps around this
* assignment
*/
data->err = err;
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index f859ec306cd..0cd9a7a05e7 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -34,33 +34,14 @@ 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
- * 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,
- * 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,
- * we set TASK_SIZE to end at the start of the last page table.
- * This keeps exit_mmap off the last page, but introduces a leak
- * of that page. So, we hang onto it here and free it in
- * destroy_context_skas.
- */
-
- mm->context.last_page_table = pmd_page_vaddr(*pmd);
-#ifdef CONFIG_3_LEVEL_PGTABLES
- mm->context.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;
out_pmd:
- pud_free(pud);
+ pud_free(mm, pud);
out_pte:
- pmd_free(pmd);
+ pmd_free(mm, pmd);
out:
return -ENOMEM;
}
@@ -76,24 +57,6 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
stack = get_zeroed_page(GFP_KERNEL);
if (stack == 0)
goto out;
-
- /*
- * 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.
- */
- mm->pgd[USER_PTRS_PER_PGD] = __pgd(0);
-
- ret = init_stub_pte(mm, STUB_CODE,
- (unsigned long) &__syscall_stub_start);
- if (ret)
- goto out_free;
-
- ret = init_stub_pte(mm, STUB_DATA, stack);
- if (ret)
- goto out_free;
-
- mm->nr_ptes--;
}
to_mm->id.stack = stack;
@@ -114,6 +77,11 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
to_mm->id.u.pid = copy_context_skas0(stack,
from_mm->id.u.pid);
else to_mm->id.u.pid = start_userspace(stack);
+
+ if (to_mm->id.u.pid < 0) {
+ ret = to_mm->id.u.pid;
+ goto out_free;
+ }
}
ret = init_new_ldt(to_mm, from_mm);
@@ -123,6 +91,8 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
goto out_free;
}
+ to_mm->stub_pages = NULL;
+
return 0;
out_free:
@@ -132,24 +102,90 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
return ret;
}
+void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+{
+ struct page **pages;
+ int err, ret;
+
+ if (!skas_needs_stub)
+ return;
+
+ ret = init_stub_pte(mm, STUB_CODE,
+ (unsigned long) &__syscall_stub_start);
+ if (ret)
+ goto out;
+
+ ret = init_stub_pte(mm, STUB_DATA, mm->context.id.stack);
+ if (ret)
+ goto out;
+
+ pages = kmalloc(2 * sizeof(struct page *), GFP_KERNEL);
+ if (pages == NULL) {
+ printk(KERN_ERR "arch_dup_mmap failed to allocate 2 page "
+ "pointers\n");
+ goto out;
+ }
+
+ pages[0] = virt_to_page(&__syscall_stub_start);
+ pages[1] = virt_to_page(mm->context.id.stack);
+ mm->context.stub_pages = pages;
+
+ /* dup_mmap already holds mmap_sem */
+ err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START,
+ VM_READ | VM_MAYREAD | VM_EXEC |
+ VM_MAYEXEC | VM_DONTCOPY, pages);
+ if (err) {
+ printk(KERN_ERR "install_special_mapping returned %d\n", err);
+ goto out_free;
+ }
+ return;
+
+out_free:
+ kfree(pages);
+out:
+ force_sigsegv(SIGSEGV, current);
+}
+
+void arch_exit_mmap(struct mm_struct *mm)
+{
+ pte_t *pte;
+
+ if (mm->context.stub_pages != NULL)
+ kfree(mm->context.stub_pages);
+ pte = virt_to_pte(mm, STUB_CODE);
+ if (pte != NULL)
+ pte_clear(mm, STUB_CODE, pte);
+
+ pte = virt_to_pte(mm, STUB_DATA);
+ if (pte == NULL)
+ return;
+
+ pte_clear(mm, STUB_DATA, pte);
+}
+
void destroy_context(struct mm_struct *mm)
{
struct mm_context *mmu = &mm->context;
if (proc_mm)
os_close_file(mmu->id.u.mm_fd);
- else
+ else {
+ /*
+ * If init_new_context wasn't called, this will be
+ * zero, resulting in a kill(0), which will result in the
+ * whole UML suddenly dying. Also, cover negative and
+ * 1 cases, since they shouldn't happen either.
+ */
+ if (mmu->id.u.pid < 2) {
+ printk(KERN_ERR "corrupt mm_context - pid = %d\n",
+ mmu->id.u.pid);
+ return;
+ }
os_kill_ptraced_process(mmu->id.u.pid, 1);
+ }
- if (!proc_mm || !ptrace_faultinfo) {
+ if (skas_needs_stub)
free_page(mmu->id.stack);
- pte_lock_deinit(virt_to_page(mmu->last_page_table));
- pte_free_kernel((pte_t *) mmu->last_page_table);
- dec_zone_page_state(virt_to_page(mmu->last_page_table), NR_PAGETABLE);
-#ifdef CONFIG_3_LEVEL_PGTABLES
- pmd_free((pmd_t *) mmu->last_pmd);
-#endif
- }
free_ldt(mmu);
}
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index fce389c2342..2e9852c0d48 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -6,19 +6,25 @@
#include "linux/init.h"
#include "linux/sched.h"
#include "as-layout.h"
+#include "kern.h"
#include "os.h"
#include "skas.h"
int new_mm(unsigned long stack)
{
- int fd;
+ int fd, err;
fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
if (fd < 0)
return fd;
- if (skas_needs_stub)
- map_stub_pages(fd, STUB_CODE, STUB_DATA, stack);
+ if (skas_needs_stub) {
+ err = map_stub_pages(fd, STUB_CODE, STUB_DATA, stack);
+ if (err) {
+ os_close_file(fd);
+ return err;
+ }
+ }
return fd;
}
@@ -49,8 +55,14 @@ 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);
+ if (userspace_pid[0] < 0) {
+ printf("start_uml - start_userspace returned %d\n",
+ userspace_pid[0]);
+ exit(1);
+ }
+ }
init_new_thread_signals();
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
index 50b476f2b38..4e3b820bd2b 100644
--- a/arch/um/kernel/skas/syscall.c
+++ b/arch/um/kernel/skas/syscall.c
@@ -9,6 +9,9 @@
#include "sysdep/ptrace.h"
#include "sysdep/syscalls.h"
+extern int syscall_table_size;
+#define NR_syscalls (syscall_table_size / sizeof(void *))
+
void handle_syscall(struct uml_pt_regs *r)
{
struct pt_regs *regs = container_of(r, struct pt_regs, regs);
@@ -17,9 +20,6 @@ void handle_syscall(struct uml_pt_regs *r)
syscall_trace(r, 0);
- current->thread.nsyscalls++;
- nsyscalls++;
-
/*
* This should go in the declaration of syscall, but when I do that,
* strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index 1d8b119f2d0..e22c96993db 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -3,128 +3,130 @@
* Licensed under the GPL
*/
-#include "linux/err.h"
-#include "linux/highmem.h"
-#include "linux/mm.h"
-#include "asm/current.h"
-#include "asm/page.h"
-#include "asm/pgtable.h"
+#include <linux/err.h>
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <asm/current.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
#include "kern_util.h"
#include "os.h"
-extern void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
- pte_t *pte_out);
-
-static unsigned long maybe_map(unsigned long virt, int is_write)
+pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr)
{
- pte_t pte;
- int err;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+
+ if (mm == NULL)
+ return NULL;
+
+ pgd = pgd_offset(mm, addr);
+ if (!pgd_present(*pgd))
+ return NULL;
+
+ pud = pud_offset(pgd, addr);
+ if (!pud_present(*pud))
+ return NULL;
- void *phys = um_virt_to_phys(current, virt, &pte);
- int dummy_code;
+ pmd = pmd_offset(pud, addr);
+ if (!pmd_present(*pmd))
+ return NULL;
+
+ return pte_offset_kernel(pmd, addr);
+}
+
+static pte_t *maybe_map(unsigned long virt, int is_write)
+{
+ pte_t *pte = virt_to_pte(current->mm, virt);
+ int err, dummy_code;
- if (IS_ERR(phys) || (is_write && !pte_write(pte))) {
+ if ((pte == NULL) || !pte_present(*pte) ||
+ (is_write && !pte_write(*pte))) {
err = handle_page_fault(virt, 0, is_write, 1, &dummy_code);
if (err)
- return -1UL;
- phys = um_virt_to_phys(current, virt, NULL);
+ return NULL;
+ pte = virt_to_pte(current->mm, virt);
}
- if (IS_ERR(phys))
- phys = (void *) -1;
+ if (!pte_present(*pte))
+ pte = NULL;
- return (unsigned long) phys;
+ return pte;
}
static int do_op_one_page(unsigned long addr, int len, int is_write,
int (*op)(unsigned long addr, int len, void *arg), void *arg)
{
+ jmp_buf buf;
struct page *page;
- int n;
+ pte_t *pte;
+ int n, faulted;
- addr = maybe_map(addr, is_write);
- if (addr == -1UL)
+ pte = maybe_map(addr, is_write);
+ if (pte == NULL)
return -1;
- page = phys_to_page(addr);
+ page = pte_page(*pte);
addr = (unsigned long) kmap_atomic(page, KM_UML_USERCOPY) +
(addr & ~PAGE_MASK);
- n = (*op)(addr, len, arg);
+ current->thread.fault_catcher = &buf;
+
+ faulted = UML_SETJMP(&buf);
+ if (faulted == 0)
+ n = (*op)(addr, len, arg);
+ else
+ n = -1;
+
+ current->thread.fault_catcher = NULL;
kunmap_atomic(page, KM_UML_USERCOPY);
return n;
}
-static void do_buffer_op(void *jmpbuf, void *arg_ptr)
+static int buffer_op(unsigned long addr, int len, int is_write,
+ int (*op)(unsigned long, int, void *), void *arg)
{
- va_list args;
- unsigned long addr;
- int len, is_write, size, remain, n;
- int (*op)(unsigned long, int, void *);
- void *arg;
- int *res;
-
- va_copy(args, *(va_list *)arg_ptr);
- addr = va_arg(args, unsigned long);
- len = va_arg(args, int);
- is_write = va_arg(args, int);
- op = va_arg(args, void *);
- arg = va_arg(args, void *);
- res = va_arg(args, int *);
- va_end(args);
+ int size, remain, n;
+
size = min(PAGE_ALIGN(addr) - addr, (unsigned long) len);
remain = len;
- current->thread.fault_catcher = jmpbuf;
n = do_op_one_page(addr, size, is_write, op, arg);
if (n != 0) {
- *res = (n < 0 ? remain : 0);
+ remain = (n < 0 ? remain : 0);
goto out;
}
addr += size;
remain -= size;
- if (remain == 0) {
- *res = 0;
+ if (remain == 0)
goto out;
- }
- while(addr < ((addr + remain) & PAGE_MASK)) {
+ while (addr < ((addr + remain) & PAGE_MASK)) {
n = do_op_one_page(addr, PAGE_SIZE, is_write, op, arg);
if (n != 0) {
- *res = (n < 0 ? remain : 0);
+ remain = (n < 0 ? remain : 0);
goto out;
}
addr += PAGE_SIZE;
remain -= PAGE_SIZE;
}
- if (remain == 0) {
- *res = 0;
+ if (remain == 0)
goto out;
- }
n = do_op_one_page(addr, remain, is_write, op, arg);
- if (n != 0)
- *res = (n < 0 ? remain : 0);
- else *res = 0;
- out:
- current->thread.fault_catcher = NULL;
-}
-
-static int buffer_op(unsigned long addr, int len, int is_write,
- int (*op)(unsigned long addr, int len, void *arg),
- void *arg)
-{
- int faulted, res;
-
- faulted = setjmp_wrapper(do_buffer_op, addr, len, is_write, op, arg,
- &res);
- if (!faulted)
- return res;
+ if (n != 0) {
+ remain = (n < 0 ? remain : 0);
+ goto out;
+ }
- return addr + len - (unsigned long) current->thread.fault_addr;
+ return 0;
+ out:
+ return remain;
}
static int copy_chunk_from_user(unsigned long from, int len, void *arg)
diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index 36d89cf8d20..e1062ec36d4 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -21,7 +21,6 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
#include "asm/smp.h"
#include "asm/processor.h"
#include "asm/spinlock.h"
-#include "kern_util.h"
#include "kern.h"
#include "irq_user.h"
#include "os.h"
@@ -61,7 +60,7 @@ void smp_send_stop(void)
continue;
os_write_file(cpu_data[i].ipi_pipe[1], "S", 1);
}
- printk(KERN_INFO "done\n");
+ printk(KERN_CONT "done\n");
}
static cpumask_t smp_commenced_mask = CPU_MASK_NONE;
@@ -75,8 +74,7 @@ static int idle_proc(void *cpup)
if (err < 0)
panic("CPU#%d failed to create IPI pipe, err = %d", cpu, -err);
- os_set_fd_async(cpu_data[cpu].ipi_pipe[0],
- current->thread.mode.tt.extern_pid);
+ os_set_fd_async(cpu_data[cpu].ipi_pipe[0]);
wmb();
if (cpu_test_and_set(cpu, cpu_callin_map)) {
@@ -129,8 +127,7 @@ void smp_prepare_cpus(unsigned int maxcpus)
if (err < 0)
panic("CPU#0 failed to create IPI pipe, errno = %d", -err);
- os_set_fd_async(cpu_data[me].ipi_pipe[0],
- current->thread.mode.tt.extern_pid);
+ os_set_fd_async(cpu_data[me].ipi_pipe[0]);
for (cpu = 1; cpu < ncpus; cpu++) {
printk(KERN_INFO "Booting processor %d...\n", cpu);
@@ -143,9 +140,8 @@ void smp_prepare_cpus(unsigned int maxcpus)
while (waittime-- && !cpu_isset(cpu, cpu_callin_map))
cpu_relax();
- if (cpu_isset(cpu, cpu_callin_map))
- printk(KERN_INFO "done\n");
- else printk(KERN_INFO "failed\n");
+ printk(KERN_INFO "%s\n",
+ cpu_isset(cpu, cpu_calling_map) ? "done" : "failed");
}
}
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index b9d92b2089a..9cffc628a37 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -13,9 +13,6 @@
#include "asm/uaccess.h"
#include "asm/unistd.h"
-/* Unlocked, I don't care if this is a bit off */
-int nsyscalls = 0;
-
long sys_fork(void)
{
long ret;
diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c
index 93263571d81..56d43d0a396 100644
--- a/arch/um/kernel/sysrq.c
+++ b/arch/um/kernel/sysrq.c
@@ -1,38 +1,37 @@
-/*
- * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "linux/sched.h"
-#include "linux/kernel.h"
-#include "linux/module.h"
-#include "linux/kallsyms.h"
-#include "asm/page.h"
-#include "asm/processor.h"
+#include <linux/kallsyms.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
#include "sysrq.h"
/* Catch non-i386 SUBARCH's. */
#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT)
void show_trace(struct task_struct *task, unsigned long * stack)
{
- unsigned long addr;
+ unsigned long addr;
- if (!stack) {
+ if (!stack) {
stack = (unsigned long*) &stack;
WARN_ON(1);
}
- printk("Call Trace: \n");
- while (((long) stack & (THREAD_SIZE-1)) != 0) {
- addr = *stack;
+ printk(KERN_INFO "Call Trace: \n");
+ while (((long) stack & (THREAD_SIZE-1)) != 0) {
+ addr = *stack;
if (__kernel_text_address(addr)) {
- printk("%08lx: [<%08lx>]", (unsigned long) stack, addr);
- print_symbol(" %s", addr);
- printk("\n");
- }
- stack++;
- }
- printk("\n");
+ printk(KERN_INFO "%08lx: [<%08lx>]",
+ (unsigned long) stack, addr);
+ print_symbol(KERN_CONT " %s", addr);
+ printk(KERN_CONT "\n");
+ }
+ stack++;
+ }
+ printk(KERN_INFO "\n");
}
#endif
@@ -67,14 +66,13 @@ void show_stack(struct task_struct *task, unsigned long *esp)
}
stack = esp;
- for(i = 0; i < kstack_depth_to_print; i++) {
+ for (i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(stack))
break;
if (i && ((i % 8) == 0))
- printk("\n ");
+ printk("\n" KERN_INFO " ");
printk("%08lx ", *stack++);
}
- printk("Call Trace: \n");
show_trace(task, esp);
}
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 1ac746a9eae..e066e84493b 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -3,12 +3,12 @@
* Licensed under the GPL
*/
-#include "linux/clockchips.h"
-#include "linux/interrupt.h"
-#include "linux/jiffies.h"
-#include "linux/threads.h"
-#include "asm/irq.h"
-#include "asm/param.h"
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/threads.h>
+#include <asm/irq.h>
+#include <asm/param.h>
#include "kern_util.h"
#include "os.h"
@@ -32,7 +32,7 @@ void timer_handler(int sig, struct uml_pt_regs *regs)
static void itimer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
- switch(mode) {
+ switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
set_interval();
break;
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index f4a0e407eee..d175d0566af 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -3,9 +3,10 @@
* Licensed under the GPL
*/
-#include "linux/mm.h"
-#include "asm/pgtable.h"
-#include "asm/tlbflush.h"
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <asm/pgtable.h>
+#include <asm/tlbflush.h>
#include "as-layout.h"
#include "mem_user.h"
#include "os.h"
@@ -56,7 +57,7 @@ static int do_ops(struct host_vm_change *hvc, int end,
for (i = 0; i < end && !ret; i++) {
op = &hvc->ops[i];
- switch(op->type) {
+ switch (op->type) {
case MMAP:
ret = map(hvc->id, op->u.mmap.addr, op->u.mmap.len,
op->u.mmap.prot, op->u.mmap.fd,
@@ -183,27 +184,30 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
pte = pte_offset_kernel(pmd, addr);
do {
+ if ((addr >= STUB_START) && (addr < STUB_END))
+ continue;
+
r = pte_read(*pte);
w = pte_write(*pte);
x = pte_exec(*pte);
if (!pte_young(*pte)) {
r = 0;
w = 0;
- } else if (!pte_dirty(*pte)) {
+ } else if (!pte_dirty(*pte))
w = 0;
- }
+
prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
(x ? UM_PROT_EXEC : 0));
if (hvc->force || pte_newpage(*pte)) {
if (pte_present(*pte))
ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
PAGE_SIZE, prot, hvc);
- else ret = add_munmap(addr, PAGE_SIZE, hvc);
- }
- else if (pte_newprot(*pte))
+ else
+ ret = add_munmap(addr, PAGE_SIZE, hvc);
+ } else if (pte_newprot(*pte))
ret = add_mprotect(addr, PAGE_SIZE, prot, hvc);
*pte = pte_mkuptodate(*pte);
- } while (pte++, addr += PAGE_SIZE, ((addr != end) && !ret));
+ } while (pte++, addr += PAGE_SIZE, ((addr < end) && !ret));
return ret;
}
@@ -225,7 +229,7 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr,
}
}
else ret = update_pte_range(pmd, addr, next, hvc);
- } while (pmd++, addr = next, ((addr != end) && !ret));
+ } while (pmd++, addr = next, ((addr < end) && !ret));
return ret;
}
@@ -247,7 +251,7 @@ static inline int update_pud_range(pgd_t *pgd, unsigned long addr,
}
}
else ret = update_pmd_range(pud, addr, next, hvc);
- } while (pud++, addr = next, ((addr != end) && !ret));
+ } while (pud++, addr = next, ((addr < end) && !ret));
return ret;
}
@@ -270,7 +274,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
}
}
else ret = update_pud_range(pgd, addr, next, &hvc);
- } while (pgd++, addr = next, ((addr != end_addr) && !ret));
+ } while (pgd++, addr = next, ((addr < end_addr) && !ret));
if (!ret)
ret = do_ops(&hvc, hvc.index, 1);
@@ -485,9 +489,6 @@ void __flush_tlb_one(unsigned long addr)
static void fix_range(struct mm_struct *mm, unsigned long start_addr,
unsigned long end_addr, int force)
{
- if (!proc_mm && (end_addr > STUB_START))
- end_addr = STUB_START;
-
fix_range_common(mm, start_addr, end_addr, force);
}
@@ -499,10 +500,9 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
else fix_range(vma->vm_mm, start, end, 0);
}
-void flush_tlb_mm(struct mm_struct *mm)
+void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
+ unsigned long end)
{
- unsigned long end;
-
/*
* Don't bother flushing if this address space is about to be
* destroyed.
@@ -510,8 +510,17 @@ void flush_tlb_mm(struct mm_struct *mm)
if (atomic_read(&mm->mm_users) == 0)
return;
- end = proc_mm ? task_size : STUB_START;
- fix_range(mm, 0, end, 0);
+ fix_range(mm, start, end, 0);
+}
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+ struct vm_area_struct *vma = mm->mmap;
+
+ while (vma != NULL) {
+ fix_range(mm, vma->vm_start, vma->vm_end, 0);
+ vma = vma->vm_next;
+ }
}
void force_flush_all(void)
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index cb3321f8e0a..44e49041949 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -13,6 +13,7 @@
#include "as-layout.h"
#include "kern_util.h"
#include "os.h"
+#include "skas.h"
#include "sysdep/sigcontext.h"
/*
@@ -128,7 +129,19 @@ static void bad_segv(struct faultinfo fi, unsigned long ip)
force_sig_info(SIGSEGV, &si, current);
}
-static void segv_handler(int sig, struct uml_pt_regs *regs)
+void fatal_sigsegv(void)
+{
+ force_sigsegv(SIGSEGV, current);
+ do_signal();
+ /*
+ * This is to tell gcc that we're not returning - do_signal
+ * can, in general, return, but in this case, it's not, since
+ * we just got a fatal SIGSEGV queued.
+ */
+ os_dump_core();
+}
+
+void segv_handler(int sig, struct uml_pt_regs *regs)
{
struct faultinfo * fi = UPT_FAULTINFO(regs);
@@ -216,9 +229,6 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
void relay_signal(int sig, struct uml_pt_regs *regs)
{
- if (arch_handle_signal(sig, regs))
- return;
-
if (!UPT_IS_USER(regs)) {
if (sig == SIGBUS)
printk(KERN_ERR "Bus error - the host /dev/shm or /tmp "
@@ -226,31 +236,24 @@ void relay_signal(int sig, struct uml_pt_regs *regs)
panic("Kernel mode signal %d", sig);
}
+ arch_examine_signal(sig, regs);
+
current->thread.arch.faultinfo = *UPT_FAULTINFO(regs);
force_sig(sig, current);
}
-static void bus_handler(int sig, struct uml_pt_regs *regs)
+void bus_handler(int sig, struct uml_pt_regs *regs)
{
if (current->thread.fault_catcher != NULL)
UML_LONGJMP(current->thread.fault_catcher, 1);
else relay_signal(sig, regs);
}
-static void winch(int sig, struct uml_pt_regs *regs)
+void winch(int sig, struct uml_pt_regs *regs)
{
do_IRQ(WINCH_IRQ, regs);
}
-const struct kern_handlers handlinfo_kern = {
- .relay_signal = relay_signal,
- .winch = winch,
- .bus_handler = bus_handler,
- .page_fault = segv_handler,
- .sigio_handler = sigio_handler,
- .timer_handler = timer_handler
-};
-
void trap_init(void)
{
}
diff --git a/arch/um/kernel/uaccess.c b/arch/um/kernel/uaccess.c
index d7436aacd26..f0f4b040d7c 100644
--- a/arch/um/kernel/uaccess.c
+++ b/arch/um/kernel/uaccess.c
@@ -1,10 +1,11 @@
/*
* Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-/* These are here rather than tt/uaccess.c because skas mode needs them in
+/*
+ * These are here rather than tt/uaccess.c because skas mode needs them in
* order to do SIGBUS recovery when a tmpfs mount runs out of room.
*/
@@ -25,6 +26,8 @@ int __do_copy_to_user(void *to, const void *from, int n,
fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
__do_copy, &faulted);
- if(!faulted) return(0);
- else return(n - (fault - (unsigned long) to));
+ if (!faulted)
+ return 0;
+ else
+ return n - (fault - (unsigned long) to);
}
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index f1c71393f57..a6c1dd1cf5a 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -3,22 +3,23 @@
* Licensed under the GPL
*/
-#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/pgtable.h"
-#include "asm/processor.h"
-#include "asm/setup.h"
-#include "arch.h"
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/string.h>
+#include <linux/utsname.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/setup.h>
#include "as-layout.h"
+#include "arch.h"
#include "init.h"
#include "kern.h"
+#include "kern_util.h"
#include "mem_user.h"
#include "os.h"
-#include "skas.h"
#define DEFAULT_COMMAND_LINE "root=98:0"
@@ -100,8 +101,6 @@ const struct seq_operations cpuinfo_op = {
};
/* Set in linux_main */
-unsigned long host_task_size;
-unsigned long task_size;
unsigned long uml_physmem;
unsigned long uml_reserved; /* Also modified in mem_init */
unsigned long start_vm;
@@ -197,20 +196,19 @@ __uml_setup("--help", Usage,
" Prints this message.\n\n"
);
-static int __init uml_checksetup(char *line, int *add)
+static void __init uml_checksetup(char *line, int *add)
{
struct uml_param *p;
p = &__uml_setup_start;
- while(p < &__uml_setup_end) {
+ while (p < &__uml_setup_end) {
int n;
n = strlen(p->str);
if (!strncmp(line, p->str, n) && p->setup_func(line + n, add))
- return 1;
+ return;
p++;
}
- return 0;
}
static void __init uml_postsetup(void)
@@ -218,14 +216,36 @@ 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++;
}
return;
}
+static int panic_exit(struct notifier_block *self, unsigned long unused1,
+ void *unused2)
+{
+ bust_spinlocks(1);
+ show_regs(&(current->thread.regs));
+ bust_spinlocks(0);
+ uml_exitcode = 1;
+ os_dump_core();
+ return 0;
+}
+
+static struct notifier_block panic_exit_notifier = {
+ .notifier_call = panic_exit,
+ .next = NULL,
+ .priority = 0
+};
+
/* Set during early boot */
+unsigned long task_size;
+EXPORT_SYMBOL(task_size);
+
+unsigned long host_task_size;
+
unsigned long brk_start;
unsigned long end_iomem;
EXPORT_SYMBOL(end_iomem);
@@ -234,20 +254,6 @@ EXPORT_SYMBOL(end_iomem);
extern char __binary_start;
-static unsigned long set_task_sizes_skas(unsigned long *task_size_out)
-{
- /* Round up to the nearest 4M */
- unsigned long host_task_size = ROUND_4M((unsigned long)
- &host_task_size);
-
- if (!skas_needs_stub)
- *task_size_out = host_task_size;
- else
- *task_size_out = STUB_START & PGDIR_MASK;
-
- return host_task_size;
-}
-
int __init linux_main(int argc, char **argv)
{
unsigned long avail, diff;
@@ -266,6 +272,13 @@ int __init linux_main(int argc, char **argv)
if (have_root == 0)
add_arg(DEFAULT_COMMAND_LINE);
+ host_task_size = os_get_task_size();
+ /*
+ * TASK_SIZE needs to be PGDIR_SIZE aligned or else exit_mmap craps
+ * out
+ */
+ task_size = host_task_size & PGDIR_MASK;
+
/* OS sanity checks that need to happen before the kernel runs */
os_early_checks();
@@ -278,13 +291,6 @@ int __init linux_main(int argc, char **argv)
printf("UML running in %s mode\n", mode);
- host_task_size = set_task_sizes_skas(&task_size);
-
- /*
- * Setting up handlers to 'sig_info' struct
- */
- os_fill_handlinfo(handlinfo_kern);
-
brk_start = (unsigned long) sbrk(0);
/*
@@ -309,7 +315,7 @@ int __init linux_main(int argc, char **argv)
highmem = 0;
iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
- max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC;
+ max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC;
/*
* Zones have to begin on a 1 << MAX_ORDER page boundary,
@@ -341,7 +347,7 @@ int __init linux_main(int argc, char **argv)
}
virtmem_size = physmem_size;
- avail = get_kmem_end() - start_vm;
+ avail = TASK_SIZE - start_vm;
if (physmem_size > avail)
virtmem_size = avail;
end_vm = start_vm + virtmem_size;
@@ -350,6 +356,9 @@ int __init linux_main(int argc, char **argv)
printf("Kernel virtual memory size shrunk to %lu bytes\n",
virtmem_size);
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &panic_exit_notifier);
+
uml_postsetup();
stack_protections((unsigned long) &init_thread_info);
@@ -358,29 +367,8 @@ int __init linux_main(int argc, char **argv)
return start_uml();
}
-extern int uml_exitcode;
-
-static int panic_exit(struct notifier_block *self, unsigned long unused1,
- void *unused2)
-{
- bust_spinlocks(1);
- show_regs(&(current->thread.regs));
- bust_spinlocks(0);
- uml_exitcode = 1;
- os_dump_core();
- return 0;
-}
-
-static struct notifier_block panic_exit_notifier = {
- .notifier_call = panic_exit,
- .next = NULL,
- .priority = 0
-};
-
void __init setup_arch(char **cmdline_p)
{
- atomic_notifier_chain_register(&panic_notifier_list,
- &panic_exit_notifier);
paging_init();
strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
diff --git a/arch/um/kernel/umid.c b/arch/um/kernel/umid.c
index 039e16efcd5..81e07e2be3a 100644
--- a/arch/um/kernel/umid.c
+++ b/arch/um/kernel/umid.c
@@ -1,13 +1,12 @@
-/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include "asm/errno.h"
+#include <asm/errno.h>
#include "init.h"
-#include "os.h"
#include "kern.h"
-#include "linux/kernel.h"
+#include "os.h"
/* Changed by set_umid_arg */
static int umid_inited = 0;
@@ -16,16 +15,16 @@ static int __init set_umid_arg(char *name, int *add)
{
int err;
- if(umid_inited){
+ if (umid_inited) {
printf("umid already set\n");
return 0;
}
*add = 0;
err = set_umid(name);
- if(err == -EEXIST)
+ if (err == -EEXIST)
printf("umid '%s' already in use\n", name);
- else if(!err)
+ else if (!err)
umid_inited = 1;
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-04 10:35:09 +0000