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authorPaul Mackerras <paulus@samba.org>2005-11-07 19:14:20 -0500
committerPaul Mackerras <paulus@samba.org>2005-11-07 19:14:20 -0500
commit24bfb00123e82a2e70bd115277d922438813515b (patch)
tree27328b8a5718e16d64e2d101f4b7ddcad5930aed /arch/um
parentc6135234550ed89a6fd0e8cb229633967e41d649 (diff)
parent3f00d3e8fb963968a922d821a9a53b503b687e81 (diff)
Merge ../linux-2.6
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/Kconfig46
-rw-r--r--arch/um/Makefile2
-rw-r--r--arch/um/Makefile-i3862
-rw-r--r--arch/um/drivers/chan_user.c1
-rw-r--r--arch/um/drivers/harddog_kern.c1
-rw-r--r--arch/um/drivers/harddog_user.c1
-rw-r--r--arch/um/drivers/net_kern.c38
-rw-r--r--arch/um/drivers/net_user.c1
-rw-r--r--arch/um/drivers/port_user.c1
-rw-r--r--arch/um/drivers/random.c6
-rw-r--r--arch/um/drivers/slip_user.c1
-rw-r--r--arch/um/drivers/slirp_user.c1
-rw-r--r--arch/um/drivers/xterm.c1
-rw-r--r--arch/um/include/helper.h27
-rw-r--r--arch/um/include/mem_user.h2
-rw-r--r--arch/um/include/net_user.h2
-rw-r--r--arch/um/include/os.h16
-rw-r--r--arch/um/include/sysdep-i386/stub.h64
-rw-r--r--arch/um/include/sysdep-x86_64/stub.h61
-rw-r--r--arch/um/include/uml_uaccess.h4
-rw-r--r--arch/um/kernel/Makefile7
-rw-r--r--arch/um/kernel/ksyms.c1
-rw-r--r--arch/um/kernel/mem.c4
-rw-r--r--arch/um/kernel/physmem.c4
-rw-r--r--arch/um/kernel/ptrace.c50
-rw-r--r--arch/um/kernel/sigio_user.c3
-rw-r--r--arch/um/kernel/skas/include/mmu-skas.h2
-rw-r--r--arch/um/kernel/skas/include/skas.h3
-rw-r--r--arch/um/kernel/skas/mem.c2
-rw-r--r--arch/um/kernel/skas/mmu.c44
-rw-r--r--arch/um/kernel/skas/process.c17
-rw-r--r--arch/um/kernel/skas/process_kern.c2
-rw-r--r--arch/um/kernel/tt/uaccess_user.c1
-rw-r--r--arch/um/kernel/uaccess.c30
-rw-r--r--arch/um/kernel/uaccess_user.c64
-rw-r--r--arch/um/kernel/um_arch.c10
-rw-r--r--arch/um/kernel/user_util.c1
-rw-r--r--arch/um/os-Linux/Makefile9
-rw-r--r--arch/um/os-Linux/aio.c1
-rw-r--r--arch/um/os-Linux/drivers/ethertap_user.c1
-rw-r--r--arch/um/os-Linux/drivers/tuntap_user.c1
-rw-r--r--arch/um/os-Linux/helper.c (renamed from arch/um/kernel/helper.c)18
-rw-r--r--arch/um/os-Linux/main.c (renamed from arch/um/kernel/main.c)49
-rw-r--r--arch/um/os-Linux/mem.c6
-rw-r--r--arch/um/os-Linux/start_up.c77
-rw-r--r--arch/um/os-Linux/uaccess.c32
-rw-r--r--arch/um/scripts/Makefile.rules7
-rw-r--r--arch/um/sys-i386/ldt.c506
-rw-r--r--arch/um/sys-x86_64/Makefile5
-rw-r--r--arch/um/sys-x86_64/syscalls.c75
50 files changed, 855 insertions, 455 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index cd06ed7d842d..3b5f47c46907 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -65,6 +65,30 @@ config STATIC_LINK
65 chroot, and you disable CONFIG_MODE_TT, you probably want to say Y 65 chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
66 here. 66 here.
67 67
68config HOST_2G_2G
69 bool "2G/2G host address space split"
70 default n
71 depends on MODE_TT
72 help
73 This is needed when the host on which you run has a 2G/2G memory
74 split, instead of the customary 3G/1G.
75
76 Note that to enable such a host
77 configuration, which makes sense only in some cases, you need special
78 host patches.
79
80 So, if you do not know what to do here, say 'N'.
81
82config KERNEL_HALF_GIGS
83 int "Kernel address space size (in .5G units)"
84 default "1"
85 depends on MODE_TT
86 help
87 This determines the amount of address space that UML will allocate for
88 its own, measured in half Gigabyte units. The default is 1.
89 Change this only if you need to boot UML with an unusually large amount
90 of physical memory.
91
68config MODE_SKAS 92config MODE_SKAS
69 bool "Separate Kernel Address Space support" 93 bool "Separate Kernel Address Space support"
70 default y 94 default y
@@ -182,19 +206,6 @@ config MAGIC_SYSRQ
182 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y 206 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
183 unless you really know what this hack does. 207 unless you really know what this hack does.
184 208
185config HOST_2G_2G
186 bool "2G/2G host address space split"
187 default n
188 help
189 This is needed when the host on which you run has a 2G/2G memory
190 split, instead of the customary 3G/1G.
191
192 Note that to enable such a host
193 configuration, which makes sense only in some cases, you need special
194 host patches.
195
196 So, if you do not know what to do here, say 'N'.
197
198config SMP 209config SMP
199 bool "Symmetric multi-processing support (EXPERIMENTAL)" 210 bool "Symmetric multi-processing support (EXPERIMENTAL)"
200 default n 211 default n
@@ -241,15 +252,6 @@ config NEST_LEVEL
241 set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS. 252 set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS.
242 Only change this if you are running nested UMLs. 253 Only change this if you are running nested UMLs.
243 254
244config KERNEL_HALF_GIGS
245 int "Kernel address space size (in .5G units)"
246 default "1"
247 help
248 This determines the amount of address space that UML will allocate for
249 its own, measured in half Gigabyte units. The default is 1.
250 Change this only if you need to boot UML with an unusually large amount
251 of physical memory.
252
253config HIGHMEM 255config HIGHMEM
254 bool "Highmem support" 256 bool "Highmem support"
255 depends on !64BIT 257 depends on !64BIT
diff --git a/arch/um/Makefile b/arch/um/Makefile
index e1ffad224605..e55d32e903bc 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -60,7 +60,7 @@ AFLAGS += $(ARCH_INCLUDE)
60 60
61USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) 61USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
62USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ 62USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
63 $(MODE_INCLUDE) 63 $(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64
64 64
65# -Derrno=kernel_errno - This turns all kernel references to errno into 65# -Derrno=kernel_errno - This turns all kernel references to errno into
66# kernel_errno to separate them from the libc errno. This allows -fno-common 66# kernel_errno to separate them from the libc errno. This allows -fno-common
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index aef7c50f8e13..1f7dcb064aee 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -17,8 +17,6 @@ ifeq ("$(origin SUBARCH)", "command line")
17ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)") 17ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)")
18CFLAGS += $(call cc-option,-m32) 18CFLAGS += $(call cc-option,-m32)
19USER_CFLAGS += $(call cc-option,-m32) 19USER_CFLAGS += $(call cc-option,-m32)
20HOSTCFLAGS += $(call cc-option,-m32)
21HOSTLDFLAGS += $(call cc-option,-m32)
22AFLAGS += $(call cc-option,-m32) 20AFLAGS += $(call cc-option,-m32)
23LINK-y += $(call cc-option,-m32) 21LINK-y += $(call cc-option,-m32)
24UML_OBJCOPYFLAGS += -F $(ELF_FORMAT) 22UML_OBJCOPYFLAGS += -F $(ELF_FORMAT)
diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index de3bce71aeb3..1c55d5802489 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -16,7 +16,6 @@
16#include "user_util.h" 16#include "user_util.h"
17#include "chan_user.h" 17#include "chan_user.h"
18#include "user.h" 18#include "user.h"
19#include "helper.h"
20#include "os.h" 19#include "os.h"
21#include "choose-mode.h" 20#include "choose-mode.h"
22#include "mode.h" 21#include "mode.h"
diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c
index 147ec19f6bb9..49acb2badf32 100644
--- a/arch/um/drivers/harddog_kern.c
+++ b/arch/um/drivers/harddog_kern.c
@@ -46,7 +46,6 @@
46#include <linux/smp_lock.h> 46#include <linux/smp_lock.h>
47#include <linux/init.h> 47#include <linux/init.h>
48#include <asm/uaccess.h> 48#include <asm/uaccess.h>
49#include "helper.h"
50#include "mconsole.h" 49#include "mconsole.h"
51 50
52MODULE_LICENSE("GPL"); 51MODULE_LICENSE("GPL");
diff --git a/arch/um/drivers/harddog_user.c b/arch/um/drivers/harddog_user.c
index d934181b8d4c..def013b5a3c7 100644
--- a/arch/um/drivers/harddog_user.c
+++ b/arch/um/drivers/harddog_user.c
@@ -8,7 +8,6 @@
8#include <errno.h> 8#include <errno.h>
9#include "user_util.h" 9#include "user_util.h"
10#include "user.h" 10#include "user.h"
11#include "helper.h"
12#include "mconsole.h" 11#include "mconsole.h"
13#include "os.h" 12#include "os.h"
14#include "choose-mode.h" 13#include "choose-mode.h"
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 721e2601a75d..fe865d9a3721 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -96,7 +96,6 @@ irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
96static int uml_net_open(struct net_device *dev) 96static int uml_net_open(struct net_device *dev)
97{ 97{
98 struct uml_net_private *lp = dev->priv; 98 struct uml_net_private *lp = dev->priv;
99 char addr[sizeof("255.255.255.255\0")];
100 int err; 99 int err;
101 100
102 spin_lock(&lp->lock); 101 spin_lock(&lp->lock);
@@ -107,7 +106,7 @@ static int uml_net_open(struct net_device *dev)
107 } 106 }
108 107
109 if(!lp->have_mac){ 108 if(!lp->have_mac){
110 dev_ip_addr(dev, addr, &lp->mac[2]); 109 dev_ip_addr(dev, &lp->mac[2]);
111 set_ether_mac(dev, lp->mac); 110 set_ether_mac(dev, lp->mac);
112 } 111 }
113 112
@@ -664,8 +663,6 @@ static int uml_inetaddr_event(struct notifier_block *this, unsigned long event,
664 void *ptr) 663 void *ptr)
665{ 664{
666 struct in_ifaddr *ifa = ptr; 665 struct in_ifaddr *ifa = ptr;
667 u32 addr = ifa->ifa_address;
668 u32 netmask = ifa->ifa_mask;
669 struct net_device *dev = ifa->ifa_dev->dev; 666 struct net_device *dev = ifa->ifa_dev->dev;
670 struct uml_net_private *lp; 667 struct uml_net_private *lp;
671 void (*proc)(unsigned char *, unsigned char *, void *); 668 void (*proc)(unsigned char *, unsigned char *, void *);
@@ -685,14 +682,8 @@ static int uml_inetaddr_event(struct notifier_block *this, unsigned long event,
685 break; 682 break;
686 } 683 }
687 if(proc != NULL){ 684 if(proc != NULL){
688 addr_buf[0] = addr & 0xff; 685 memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf));
689 addr_buf[1] = (addr >> 8) & 0xff; 686 memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf));
690 addr_buf[2] = (addr >> 16) & 0xff;
691 addr_buf[3] = addr >> 24;
692 netmask_buf[0] = netmask & 0xff;
693 netmask_buf[1] = (netmask >> 8) & 0xff;
694 netmask_buf[2] = (netmask >> 16) & 0xff;
695 netmask_buf[3] = netmask >> 24;
696 (*proc)(addr_buf, netmask_buf, &lp->user); 687 (*proc)(addr_buf, netmask_buf, &lp->user);
697 } 688 }
698 return(NOTIFY_DONE); 689 return(NOTIFY_DONE);
@@ -774,27 +765,18 @@ int setup_etheraddr(char *str, unsigned char *addr)
774 return(1); 765 return(1);
775} 766}
776 767
777void dev_ip_addr(void *d, char *buf, char *bin_buf) 768void dev_ip_addr(void *d, unsigned char *bin_buf)
778{ 769{
779 struct net_device *dev = d; 770 struct net_device *dev = d;
780 struct in_device *ip = dev->ip_ptr; 771 struct in_device *ip = dev->ip_ptr;
781 struct in_ifaddr *in; 772 struct in_ifaddr *in;
782 u32 addr;
783 773
784 if((ip == NULL) || ((in = ip->ifa_list) == NULL)){ 774 if((ip == NULL) || ((in = ip->ifa_list) == NULL)){
785 printk(KERN_WARNING "dev_ip_addr - device not assigned an " 775 printk(KERN_WARNING "dev_ip_addr - device not assigned an "
786 "IP address\n"); 776 "IP address\n");
787 return; 777 return;
788 } 778 }
789 addr = in->ifa_address; 779 memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address));
790 sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff,
791 (addr >> 16) & 0xff, addr >> 24);
792 if(bin_buf){
793 bin_buf[0] = addr & 0xff;
794 bin_buf[1] = (addr >> 8) & 0xff;
795 bin_buf[2] = (addr >> 16) & 0xff;
796 bin_buf[3] = addr >> 24;
797 }
798} 780}
799 781
800void set_ether_mac(void *d, unsigned char *addr) 782void set_ether_mac(void *d, unsigned char *addr)
@@ -829,14 +811,8 @@ void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *,
829 if(ip == NULL) return; 811 if(ip == NULL) return;
830 in = ip->ifa_list; 812 in = ip->ifa_list;
831 while(in != NULL){ 813 while(in != NULL){
832 address[0] = in->ifa_address & 0xff; 814 memcpy(address, &in->ifa_address, sizeof(address));
833 address[1] = (in->ifa_address >> 8) & 0xff; 815 memcpy(netmask, &in->ifa_mask, sizeof(netmask));
834 address[2] = (in->ifa_address >> 16) & 0xff;
835 address[3] = in->ifa_address >> 24;
836 netmask[0] = in->ifa_mask & 0xff;
837 netmask[1] = (in->ifa_mask >> 8) & 0xff;
838 netmask[2] = (in->ifa_mask >> 16) & 0xff;
839 netmask[3] = in->ifa_mask >> 24;
840 (*cb)(address, netmask, arg); 816 (*cb)(address, netmask, arg);
841 in = in->ifa_next; 817 in = in->ifa_next;
842 } 818 }
diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index 3730d4f12713..098fa65981ab 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -16,7 +16,6 @@
16#include "user_util.h" 16#include "user_util.h"
17#include "kern_util.h" 17#include "kern_util.h"
18#include "net_user.h" 18#include "net_user.h"
19#include "helper.h"
20#include "os.h" 19#include "os.h"
21 20
22int tap_open_common(void *dev, char *gate_addr) 21int tap_open_common(void *dev, char *gate_addr)
diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c
index 14dd2002d2da..ed4a1a6c5d83 100644
--- a/arch/um/drivers/port_user.c
+++ b/arch/um/drivers/port_user.c
@@ -18,7 +18,6 @@
18#include "user.h" 18#include "user.h"
19#include "chan_user.h" 19#include "chan_user.h"
20#include "port.h" 20#include "port.h"
21#include "helper.h"
22#include "os.h" 21#include "os.h"
23 22
24struct port_chan { 23struct port_chan {
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index f9e22198e011..ba471f5864a6 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -58,10 +58,8 @@ static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size,
58 if (filp->f_flags & O_NONBLOCK) 58 if (filp->f_flags & O_NONBLOCK)
59 return ret ? : -EAGAIN; 59 return ret ? : -EAGAIN;
60 60
61 if(need_resched()){ 61 if(need_resched())
62 current->state = TASK_INTERRUPTIBLE; 62 schedule_timeout_interruptible(1);
63 schedule_timeout(1);
64 }
65 } 63 }
66 else return n; 64 else return n;
67 if (signal_pending (current)) 65 if (signal_pending (current))
diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index 71af444e591f..89fbec185cc1 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -14,7 +14,6 @@
14#include "net_user.h" 14#include "net_user.h"
15#include "slip.h" 15#include "slip.h"
16#include "slip_common.h" 16#include "slip_common.h"
17#include "helper.h"
18#include "os.h" 17#include "os.h"
19 18
20void slip_user_init(void *data, void *dev) 19void slip_user_init(void *data, void *dev)
diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c
index 8d91f663d82c..b94c66114bc8 100644
--- a/arch/um/drivers/slirp_user.c
+++ b/arch/um/drivers/slirp_user.c
@@ -13,7 +13,6 @@
13#include "net_user.h" 13#include "net_user.h"
14#include "slirp.h" 14#include "slirp.h"
15#include "slip_common.h" 15#include "slip_common.h"
16#include "helper.h"
17#include "os.h" 16#include "os.h"
18 17
19void slirp_user_init(void *data, void *dev) 18void slirp_user_init(void *data, void *dev)
diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c
index 90e0e5ff451e..b530f1a6540d 100644
--- a/arch/um/drivers/xterm.c
+++ b/arch/um/drivers/xterm.c
@@ -14,7 +14,6 @@
14#include <sys/socket.h> 14#include <sys/socket.h>
15#include "kern_util.h" 15#include "kern_util.h"
16#include "chan_user.h" 16#include "chan_user.h"
17#include "helper.h"
18#include "user_util.h" 17#include "user_util.h"
19#include "user.h" 18#include "user.h"
20#include "os.h" 19#include "os.h"
diff --git a/arch/um/include/helper.h b/arch/um/include/helper.h
deleted file mode 100644
index 162ac31192fd..000000000000
--- a/arch/um/include/helper.h
+++ /dev/null
@@ -1,27 +0,0 @@
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __HELPER_H__
7#define __HELPER_H__
8
9extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
10 unsigned long *stack_out);
11extern int run_helper_thread(int (*proc)(void *), void *arg,
12 unsigned int flags, unsigned long *stack_out,
13 int stack_order);
14extern int helper_wait(int pid);
15
16#endif
17
18/*
19 * Overrides for Emacs so that we follow Linus's tabbing style.
20 * Emacs will notice this stuff at the end of the file and automatically
21 * adjust the settings for this buffer only. This must remain at the end
22 * of the file.
23 * ---------------------------------------------------------------------------
24 * Local variables:
25 * c-file-style: "linux"
26 * End:
27 */
diff --git a/arch/um/include/mem_user.h b/arch/um/include/mem_user.h
index 9fef4123a65a..a1064c5823bf 100644
--- a/arch/um/include/mem_user.h
+++ b/arch/um/include/mem_user.h
@@ -57,7 +57,7 @@ extern int init_maps(unsigned long physmem, unsigned long iomem,
57 unsigned long highmem); 57 unsigned long highmem);
58extern unsigned long get_vm(unsigned long len); 58extern unsigned long get_vm(unsigned long len);
59extern void setup_physmem(unsigned long start, unsigned long usable, 59extern void setup_physmem(unsigned long start, unsigned long usable,
60 unsigned long len, unsigned long highmem); 60 unsigned long len, unsigned long long highmem);
61extern void add_iomem(char *name, int fd, unsigned long size); 61extern void add_iomem(char *name, int fd, unsigned long size);
62extern unsigned long phys_offset(unsigned long phys); 62extern unsigned long phys_offset(unsigned long phys);
63extern void unmap_physmem(void); 63extern void unmap_physmem(void);
diff --git a/arch/um/include/net_user.h b/arch/um/include/net_user.h
index 89885a77a771..800c403920bc 100644
--- a/arch/um/include/net_user.h
+++ b/arch/um/include/net_user.h
@@ -25,7 +25,7 @@ struct net_user_info {
25}; 25};
26 26
27extern void ether_user_init(void *data, void *dev); 27extern void ether_user_init(void *data, void *dev);
28extern void dev_ip_addr(void *d, char *buf, char *bin_buf); 28extern void dev_ip_addr(void *d, unsigned char *bin_buf);
29extern void set_ether_mac(void *d, unsigned char *addr); 29extern void set_ether_mac(void *d, unsigned char *addr);
30extern void iter_addresses(void *d, void (*cb)(unsigned char *, 30extern void iter_addresses(void *d, void (*cb)(unsigned char *,
31 unsigned char *, void *), 31 unsigned char *, void *),
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 2e58e304b8be..2cccfa5b8ab5 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -167,7 +167,7 @@ extern int can_do_skas(void);
167#endif 167#endif
168 168
169/* mem.c */ 169/* mem.c */
170extern int create_mem_file(unsigned long len); 170extern int create_mem_file(unsigned long long len);
171 171
172/* process.c */ 172/* process.c */
173extern unsigned long os_process_pc(int pid); 173extern unsigned long os_process_pc(int pid);
@@ -199,6 +199,20 @@ extern void forward_pending_sigio(int target);
199extern int start_fork_tramp(void *arg, unsigned long temp_stack, 199extern int start_fork_tramp(void *arg, unsigned long temp_stack,
200 int clone_flags, int (*tramp)(void *)); 200 int clone_flags, int (*tramp)(void *));
201 201
202/* uaccess.c */
203extern unsigned long __do_user_copy(void *to, const void *from, int n,
204 void **fault_addr, void **fault_catcher,
205 void (*op)(void *to, const void *from,
206 int n), int *faulted_out);
207
208/* helper.c */
209extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
210 unsigned long *stack_out);
211extern int run_helper_thread(int (*proc)(void *), void *arg,
212 unsigned int flags, unsigned long *stack_out,
213 int stack_order);
214extern int helper_wait(int pid);
215
202#endif 216#endif
203 217
204/* 218/*
diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h
index d3699fe1c613..a49ceb199ee5 100644
--- a/arch/um/include/sysdep-i386/stub.h
+++ b/arch/um/include/sysdep-i386/stub.h
@@ -16,45 +16,69 @@ extern void stub_clone_handler(void);
16#define STUB_MMAP_NR __NR_mmap2 16#define STUB_MMAP_NR __NR_mmap2
17#define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT) 17#define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT)
18 18
19static inline long stub_syscall1(long syscall, long arg1)
20{
21 long ret;
22
23 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1));
24
25 return ret;
26}
27
19static inline long stub_syscall2(long syscall, long arg1, long arg2) 28static inline long stub_syscall2(long syscall, long arg1, long arg2)
20{ 29{
21 long ret; 30 long ret;
22 31
23 __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx"); 32 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
24 __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx"); 33 "c" (arg2));
25 __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax"); 34
26 __asm__("int $0x80;" : : : "%eax"); 35 return ret;
27 __asm__ __volatile__("movl %%eax, %0; " : "=g" (ret) :);
28 return(ret);
29} 36}
30 37
31static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) 38static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
32{ 39{
33 __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx"); 40 long ret;
34 return(stub_syscall2(syscall, arg1, arg2)); 41
42 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
43 "c" (arg2), "d" (arg3));
44
45 return ret;
35} 46}
36 47
37static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, 48static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
38 long arg4) 49 long arg4)
39{ 50{
40 __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi"); 51 long ret;
41 return(stub_syscall3(syscall, arg1, arg2, arg3)); 52
53 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
54 "c" (arg2), "d" (arg3), "S" (arg4));
55
56 return ret;
57}
58
59static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
60 long arg4, long arg5)
61{
62 long ret;
63
64 __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
65 "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5));
66
67 return ret;
42} 68}
43 69
44static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3, 70static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
45 long arg4, long arg5, long arg6) 71 long arg4, long arg5, long arg6)
46{ 72{
47 long ret; 73 long ret;
48 __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax"); 74
49 __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx"); 75 __asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; "
50 __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx"); 76 "int $0x80 ; pop %%ebp"
51 __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx"); 77 : "=a" (ret)
52 __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi"); 78 : "g" (syscall), "b" (arg1), "c" (arg2), "d" (arg3),
53 __asm__("movl %0, %%edi; " : : "g" (arg5) : "%edi"); 79 "S" (arg4), "D" (arg5), "0" (arg6));
54 __asm__ __volatile__("pushl %%ebp ; movl %1, %%ebp; " 80
55 "int $0x80; popl %%ebp ; " 81 return ret;
56 "movl %%eax, %0; " : "=g" (ret) : "g" (arg6) : "%eax");
57 return(ret);
58} 82}
59 83
60static inline void trap_myself(void) 84static inline void trap_myself(void)
diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h
index f599058d8263..2bd6e7a97286 100644
--- a/arch/um/include/sysdep-x86_64/stub.h
+++ b/arch/um/include/sysdep-x86_64/stub.h
@@ -17,37 +17,72 @@ extern void stub_clone_handler(void);
17#define STUB_MMAP_NR __NR_mmap 17#define STUB_MMAP_NR __NR_mmap
18#define MMAP_OFFSET(o) (o) 18#define MMAP_OFFSET(o) (o)
19 19
20#define __syscall_clobber "r11","rcx","memory"
21#define __syscall "syscall"
22
20static inline long stub_syscall2(long syscall, long arg1, long arg2) 23static inline long stub_syscall2(long syscall, long arg1, long arg2)
21{ 24{
22 long ret; 25 long ret;
23 26
24 __asm__("movq %0, %%rsi; " : : "g" (arg2) : "%rsi"); 27 __asm__ volatile (__syscall
25 __asm__("movq %0, %%rdi; " : : "g" (arg1) : "%rdi"); 28 : "=a" (ret)
26 __asm__("movq %0, %%rax; " : : "g" (syscall) : "%rax"); 29 : "0" (syscall), "D" (arg1), "S" (arg2) : __syscall_clobber );
27 __asm__("syscall;" : : : "%rax", "%r11", "%rcx"); 30
28 __asm__ __volatile__("movq %%rax, %0; " : "=g" (ret) :); 31 return ret;
29 return(ret);
30} 32}
31 33
32static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) 34static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
33{ 35{
34 __asm__("movq %0, %%rdx; " : : "g" (arg3) : "%rdx"); 36 long ret;
35 return(stub_syscall2(syscall, arg1, arg2)); 37
38 __asm__ volatile (__syscall
39 : "=a" (ret)
40 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3)
41 : __syscall_clobber );
42
43 return ret;
36} 44}
37 45
38static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, 46static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
39 long arg4) 47 long arg4)
40{ 48{
41 __asm__("movq %0, %%r10; " : : "g" (arg4) : "%r10"); 49 long ret;
42 return(stub_syscall3(syscall, arg1, arg2, arg3)); 50
51 __asm__ volatile ("movq %5,%%r10 ; " __syscall
52 : "=a" (ret)
53 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
54 "g" (arg4)
55 : __syscall_clobber, "r10" );
56
57 return ret;
58}
59
60static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
61 long arg4, long arg5)
62{
63 long ret;
64
65 __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " __syscall
66 : "=a" (ret)
67 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
68 "g" (arg4), "g" (arg5)
69 : __syscall_clobber, "r10", "r8" );
70
71 return ret;
43} 72}
44 73
45static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3, 74static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
46 long arg4, long arg5, long arg6) 75 long arg4, long arg5, long arg6)
47{ 76{
48 __asm__("movq %0, %%r9; " : : "g" (arg6) : "%r9"); 77 long ret;
49 __asm__("movq %0, %%r8; " : : "g" (arg5) : "%r8"); 78
50 return(stub_syscall4(syscall, arg1, arg2, arg3, arg4)); 79 __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; "
80 "movq %7, %%r9; " __syscall : "=a" (ret)
81 : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3),
82 "g" (arg4), "g" (arg5), "g" (arg6)
83 : __syscall_clobber, "r10", "r8", "r9" );
84
85 return ret;
51} 86}
52 87
53static inline void trap_myself(void) 88static inline void trap_myself(void)
diff --git a/arch/um/include/uml_uaccess.h b/arch/um/include/uml_uaccess.h
index f77eb6428453..c0df11d06f5e 100644
--- a/arch/um/include/uml_uaccess.h
+++ b/arch/um/include/uml_uaccess.h
@@ -8,10 +8,6 @@
8 8
9extern int __do_copy_to_user(void *to, const void *from, int n, 9extern int __do_copy_to_user(void *to, const void *from, int n,
10 void **fault_addr, void **fault_catcher); 10 void **fault_addr, void **fault_catcher);
11extern unsigned long __do_user_copy(void *to, const void *from, int n,
12 void **fault_addr, void **fault_catcher,
13 void (*op)(void *to, const void *from,
14 int n), int *faulted_out);
15void __do_copy(void *to, const void *from, int n); 11void __do_copy(void *to, const void *from, int n);
16 12
17#endif 13#endif
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 1a0001b3850c..3de9d21e36bf 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -7,10 +7,10 @@ extra-y := vmlinux.lds
7clean-files := 7clean-files :=
8 8
9obj-y = config.o exec_kern.o exitcode.o \ 9obj-y = config.o exec_kern.o exitcode.o \
10 helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o physmem.o \ 10 init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \
11 process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \ 11 process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \
12 signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \ 12 signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \
13 time_kern.o tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o \ 13 time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o \
14 umid.o user_util.o 14 umid.o user_util.o
15 15
16obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o 16obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
@@ -24,8 +24,7 @@ obj-$(CONFIG_MODE_SKAS) += skas/
24 24
25user-objs-$(CONFIG_TTY_LOG) += tty_log.o 25user-objs-$(CONFIG_TTY_LOG) += tty_log.o
26 26
27USER_OBJS := $(user-objs-y) config.o helper.o main.o time.o tty_log.o umid.o \ 27USER_OBJS := $(user-objs-y) config.o time.o tty_log.o umid.o user_util.o
28 user_util.o
29 28
30include arch/um/scripts/Makefile.rules 29include arch/um/scripts/Makefile.rules
31 30
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index a97a72e516aa..7713e7a6f476 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -20,7 +20,6 @@
20#include "user_util.h" 20#include "user_util.h"
21#include "mem_user.h" 21#include "mem_user.h"
22#include "os.h" 22#include "os.h"
23#include "helper.h"
24 23
25EXPORT_SYMBOL(stop); 24EXPORT_SYMBOL(stop);
26EXPORT_SYMBOL(uml_physmem); 25EXPORT_SYMBOL(uml_physmem);
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 462cc9d65386..fa4f915be5c5 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -234,8 +234,8 @@ void paging_init(void)
234 empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE); 234 empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
235 for(i=0;i<sizeof(zones_size)/sizeof(zones_size[0]);i++) 235 for(i=0;i<sizeof(zones_size)/sizeof(zones_size[0]);i++)
236 zones_size[i] = 0; 236 zones_size[i] = 0;
237 zones_size[0] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT); 237 zones_size[ZONE_DMA] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT);
238 zones_size[2] = highmem >> PAGE_SHIFT; 238 zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT;
239 free_area_init(zones_size); 239 free_area_init(zones_size);
240 240
241 /* 241 /*
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index ea670fcc8af5..f3b583a878a6 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -246,7 +246,7 @@ int is_remapped(void *virt)
246/* Changed during early boot */ 246/* Changed during early boot */
247unsigned long high_physmem; 247unsigned long high_physmem;
248 248
249extern unsigned long physmem_size; 249extern unsigned long long physmem_size;
250 250
251int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem) 251int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
252{ 252{
@@ -321,7 +321,7 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
321extern int __syscall_stub_start, __binary_start; 321extern int __syscall_stub_start, __binary_start;
322 322
323void setup_physmem(unsigned long start, unsigned long reserve_end, 323void setup_physmem(unsigned long start, unsigned long reserve_end,
324 unsigned long len, unsigned long highmem) 324 unsigned long len, unsigned long long highmem)
325{ 325{
326 unsigned long reserve = reserve_end - start; 326 unsigned long reserve = reserve_end - start;
327 int pfn = PFN_UP(__pa(reserve_end)); 327 int pfn = PFN_UP(__pa(reserve_end));
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 71af4d503899..98e09395c093 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -43,53 +43,10 @@ void ptrace_disable(struct task_struct *child)
43extern int peek_user(struct task_struct * child, long addr, long data); 43extern int peek_user(struct task_struct * child, long addr, long data);
44extern int poke_user(struct task_struct * child, long addr, long data); 44extern int poke_user(struct task_struct * child, long addr, long data);
45 45
46long sys_ptrace(long request, long pid, long addr, long data) 46long arch_ptrace(struct task_struct *child, long request, long addr, long data)
47{ 47{
48 struct task_struct *child;
49 int i, ret; 48 int i, ret;
50 49
51 lock_kernel();
52 ret = -EPERM;
53 if (request == PTRACE_TRACEME) {
54 /* are we already being traced? */
55 if (current->ptrace & PT_PTRACED)
56 goto out;
57
58 ret = security_ptrace(current->parent, current);
59 if (ret)
60 goto out;
61
62 /* set the ptrace bit in the process flags. */
63 current->ptrace |= PT_PTRACED;
64 ret = 0;
65 goto out;
66 }
67 ret = -ESRCH;
68 read_lock(&tasklist_lock);
69 child = find_task_by_pid(pid);
70 if (child)
71 get_task_struct(child);
72 read_unlock(&tasklist_lock);
73 if (!child)
74 goto out;
75
76 ret = -EPERM;
77 if (pid == 1) /* you may not mess with init */
78 goto out_tsk;
79
80 if (request == PTRACE_ATTACH) {
81 ret = ptrace_attach(child);
82 goto out_tsk;
83 }
84
85#ifdef SUBACH_PTRACE_SPECIAL
86 SUBARCH_PTRACE_SPECIAL(child,request,addr,data);
87#endif
88
89 ret = ptrace_check_attach(child, request == PTRACE_KILL);
90 if (ret < 0)
91 goto out_tsk;
92
93 switch (request) { 50 switch (request) {
94 /* when I and D space are separate, these will need to be fixed. */ 51 /* when I and D space are separate, these will need to be fixed. */
95 case PTRACE_PEEKTEXT: /* read word at location addr. */ 52 case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -282,10 +239,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
282 ret = ptrace_request(child, request, addr, data); 239 ret = ptrace_request(child, request, addr, data);
283 break; 240 break;
284 } 241 }
285 out_tsk: 242
286 put_task_struct(child);
287 out:
288 unlock_kernel();
289 return ret; 243 return ret;
290} 244}
291 245
diff --git a/arch/um/kernel/sigio_user.c b/arch/um/kernel/sigio_user.c
index a52751108aa1..48b1f644b9a6 100644
--- a/arch/um/kernel/sigio_user.c
+++ b/arch/um/kernel/sigio_user.c
@@ -18,7 +18,6 @@
18#include "kern_util.h" 18#include "kern_util.h"
19#include "user_util.h" 19#include "user_util.h"
20#include "sigio.h" 20#include "sigio.h"
21#include "helper.h"
22#include "os.h" 21#include "os.h"
23 22
24/* Changed during early boot */ 23/* Changed during early boot */
@@ -225,7 +224,7 @@ static int need_poll(int n)
225 next_poll.used = n; 224 next_poll.used = n;
226 return(0); 225 return(0);
227 } 226 }
228 if(next_poll.poll != NULL) kfree(next_poll.poll); 227 kfree(next_poll.poll);
229 next_poll.poll = um_kmalloc_atomic(n * sizeof(struct pollfd)); 228 next_poll.poll = um_kmalloc_atomic(n * sizeof(struct pollfd));
230 if(next_poll.poll == NULL){ 229 if(next_poll.poll == NULL){
231 printk("need_poll : failed to allocate new pollfds\n"); 230 printk("need_poll : failed to allocate new pollfds\n");
diff --git a/arch/um/kernel/skas/include/mmu-skas.h b/arch/um/kernel/skas/include/mmu-skas.h
index 09536f81ee42..44110c521e49 100644
--- a/arch/um/kernel/skas/include/mmu-skas.h
+++ b/arch/um/kernel/skas/include/mmu-skas.h
@@ -8,6 +8,7 @@
8 8
9#include "linux/config.h" 9#include "linux/config.h"
10#include "mm_id.h" 10#include "mm_id.h"
11#include "asm/ldt.h"
11 12
12struct mmu_context_skas { 13struct mmu_context_skas {
13 struct mm_id id; 14 struct mm_id id;
@@ -15,6 +16,7 @@ struct mmu_context_skas {
15#ifdef CONFIG_3_LEVEL_PGTABLES 16#ifdef CONFIG_3_LEVEL_PGTABLES
16 unsigned long last_pmd; 17 unsigned long last_pmd;
17#endif 18#endif
19 uml_ldt_t ldt;
18}; 20};
19 21
20extern void switch_mm_skas(struct mm_id * mm_idp); 22extern void switch_mm_skas(struct mm_id * mm_idp);
diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h
index 060934740f9f..daa2f85b684c 100644
--- a/arch/um/kernel/skas/include/skas.h
+++ b/arch/um/kernel/skas/include/skas.h
@@ -10,7 +10,8 @@
10#include "sysdep/ptrace.h" 10#include "sysdep/ptrace.h"
11 11
12extern int userspace_pid[]; 12extern int userspace_pid[];
13extern int proc_mm, ptrace_faultinfo; 13extern int proc_mm, ptrace_faultinfo, ptrace_ldt;
14extern int skas_needs_stub;
14 15
15extern void switch_threads(void *me, void *next); 16extern void switch_threads(void *me, void *next);
16extern void thread_wait(void *sw, void *fb); 17extern void thread_wait(void *sw, void *fb);
diff --git a/arch/um/kernel/skas/mem.c b/arch/um/kernel/skas/mem.c
index 147466d7ff4f..88ab96c609ce 100644
--- a/arch/um/kernel/skas/mem.c
+++ b/arch/um/kernel/skas/mem.c
@@ -20,7 +20,7 @@ unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out,
20 *task_size_out = CONFIG_HOST_TASK_SIZE; 20 *task_size_out = CONFIG_HOST_TASK_SIZE;
21#else 21#else
22 *host_size_out = top; 22 *host_size_out = top;
23 if (proc_mm && ptrace_faultinfo) 23 if (!skas_needs_stub)
24 *task_size_out = top; 24 *task_size_out = top;
25 else *task_size_out = CONFIG_STUB_START & PGDIR_MASK; 25 else *task_size_out = CONFIG_STUB_START & PGDIR_MASK;
26#endif 26#endif
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 9e5e39cea821..677871f1b37c 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -15,6 +15,7 @@
15#include "asm/mmu.h" 15#include "asm/mmu.h"
16#include "asm/pgalloc.h" 16#include "asm/pgalloc.h"
17#include "asm/pgtable.h" 17#include "asm/pgtable.h"
18#include "asm/ldt.h"
18#include "os.h" 19#include "os.h"
19#include "skas.h" 20#include "skas.h"
20 21
@@ -74,13 +75,12 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
74 75
75int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) 76int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
76{ 77{
77 struct mm_struct *cur_mm = current->mm; 78 struct mmu_context_skas *from_mm = NULL;
78 struct mm_id *cur_mm_id = &cur_mm->context.skas.id; 79 struct mmu_context_skas *to_mm = &mm->context.skas;
79 struct mm_id *mm_id = &mm->context.skas.id;
80 unsigned long stack = 0; 80 unsigned long stack = 0;
81 int from, ret = -ENOMEM; 81 int from_fd, ret = -ENOMEM;
82 82
83 if(!proc_mm || !ptrace_faultinfo){ 83 if(skas_needs_stub){
84 stack = get_zeroed_page(GFP_KERNEL); 84 stack = get_zeroed_page(GFP_KERNEL);
85 if(stack == 0) 85 if(stack == 0)
86 goto out; 86 goto out;
@@ -102,33 +102,43 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
102 102
103 mm->nr_ptes--; 103 mm->nr_ptes--;
104 } 104 }
105 mm_id->stack = stack; 105
106 to_mm->id.stack = stack;
107 if(current->mm != NULL && current->mm != &init_mm)
108 from_mm = &current->mm->context.skas;
106 109
107 if(proc_mm){ 110 if(proc_mm){
108 if((cur_mm != NULL) && (cur_mm != &init_mm)) 111 if(from_mm)
109 from = cur_mm_id->u.mm_fd; 112 from_fd = from_mm->id.u.mm_fd;
110 else from = -1; 113 else from_fd = -1;
111 114
112 ret = new_mm(from, stack); 115 ret = new_mm(from_fd, stack);
113 if(ret < 0){ 116 if(ret < 0){
114 printk("init_new_context_skas - new_mm failed, " 117 printk("init_new_context_skas - new_mm failed, "
115 "errno = %d\n", ret); 118 "errno = %d\n", ret);
116 goto out_free; 119 goto out_free;
117 } 120 }
118 mm_id->u.mm_fd = ret; 121 to_mm->id.u.mm_fd = ret;
119 } 122 }
120 else { 123 else {
121 if((cur_mm != NULL) && (cur_mm != &init_mm)) 124 if(from_mm)
122 mm_id->u.pid = copy_context_skas0(stack, 125 to_mm->id.u.pid = copy_context_skas0(stack,
123 cur_mm_id->u.pid); 126 from_mm->id.u.pid);
124 else mm_id->u.pid = start_userspace(stack); 127 else to_mm->id.u.pid = start_userspace(stack);
128 }
129
130 ret = init_new_ldt(to_mm, from_mm);
131 if(ret < 0){
132 printk("init_new_context_skas - init_ldt"
133 " failed, errno = %d\n", ret);
134 goto out_free;
125 } 135 }
126 136
127 return 0; 137 return 0;
128 138
129 out_free: 139 out_free:
130 if(mm_id->stack != 0) 140 if(to_mm->id.stack != 0)
131 free_page(mm_id->stack); 141 free_page(to_mm->id.stack);
132 out: 142 out:
133 return ret; 143 return ret;
134} 144}
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index 5cd0e9929789..599d679bd4fc 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -69,6 +69,17 @@ void wait_stub_done(int pid, int sig, char * fname)
69 69
70 if((n < 0) || !WIFSTOPPED(status) || 70 if((n < 0) || !WIFSTOPPED(status) ||
71 (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){ 71 (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){
72 unsigned long regs[FRAME_SIZE];
73 if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
74 printk("Failed to get registers from stub, "
75 "errno = %d\n", errno);
76 else {
77 int i;
78
79 printk("Stub registers -\n");
80 for(i = 0; i < FRAME_SIZE; i++)
81 printk("\t%d - %lx\n", i, regs[i]);
82 }
72 panic("%s : failed to wait for SIGUSR1/SIGTRAP, " 83 panic("%s : failed to wait for SIGUSR1/SIGTRAP, "
73 "pid = %d, n = %d, errno = %d, status = 0x%x\n", 84 "pid = %d, n = %d, errno = %d, status = 0x%x\n",
74 fname, pid, n, errno, status); 85 fname, pid, n, errno, status);
@@ -370,9 +381,9 @@ int copy_context_skas0(unsigned long new_stack, int pid)
370} 381}
371 382
372/* 383/*
373 * This is used only, if proc_mm is available, while PTRACE_FAULTINFO 384 * This is used only, if stub pages are needed, while proc_mm is
374 * isn't. Opening /proc/mm creates a new mm_context, which lacks the stub-pages 385 * availabl. Opening /proc/mm creates a new mm_context, which lacks
375 * Thus, we map them using /proc/mm-fd 386 * the stub-pages. Thus, we map them using /proc/mm-fd
376 */ 387 */
377void map_stub_pages(int fd, unsigned long code, 388void map_stub_pages(int fd, unsigned long code,
378 unsigned long data, unsigned long stack) 389 unsigned long data, unsigned long stack)
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index efe92e8aa2a9..9c990253966c 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -145,7 +145,7 @@ int new_mm(int from, unsigned long stack)
145 "err = %d\n", -n); 145 "err = %d\n", -n);
146 } 146 }
147 147
148 if(!ptrace_faultinfo) 148 if(skas_needs_stub)
149 map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); 149 map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
150 150
151 return(fd); 151 return(fd);
diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c
index 8c220f054b61..6c92bbccb49c 100644
--- a/arch/um/kernel/tt/uaccess_user.c
+++ b/arch/um/kernel/tt/uaccess_user.c
@@ -10,6 +10,7 @@
10#include "uml_uaccess.h" 10#include "uml_uaccess.h"
11#include "task.h" 11#include "task.h"
12#include "kern_util.h" 12#include "kern_util.h"
13#include "os.h"
13 14
14int __do_copy_from_user(void *to, const void *from, int n, 15int __do_copy_from_user(void *to, const void *from, int n,
15 void **fault_addr, void **fault_catcher) 16 void **fault_addr, void **fault_catcher)
diff --git a/arch/um/kernel/uaccess.c b/arch/um/kernel/uaccess.c
new file mode 100644
index 000000000000..054e3de0784e
--- /dev/null
+++ b/arch/um/kernel/uaccess.c
@@ -0,0 +1,30 @@
1/*
2 * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
3 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Licensed under the GPL
5 */
6
7/* These are here rather than tt/uaccess.c because skas mode needs them in
8 * order to do SIGBUS recovery when a tmpfs mount runs out of room.
9 */
10
11#include <linux/string.h>
12#include "os.h"
13
14void __do_copy(void *to, const void *from, int n)
15{
16 memcpy(to, from, n);
17}
18
19
20int __do_copy_to_user(void *to, const void *from, int n,
21 void **fault_addr, void **fault_catcher)
22{
23 unsigned long fault;
24 int faulted;
25
26 fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
27 __do_copy, &faulted);
28 if(!faulted) return(0);
29 else return(n - (fault - (unsigned long) to));
30}
diff --git a/arch/um/kernel/uaccess_user.c b/arch/um/kernel/uaccess_user.c
deleted file mode 100644
index d035257ed0af..000000000000
--- a/arch/um/kernel/uaccess_user.c
+++ /dev/null
@@ -1,64 +0,0 @@
1/*
2 * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
3 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Licensed under the GPL
5 */
6
7#include <setjmp.h>
8#include <string.h>
9
10/* These are here rather than tt/uaccess.c because skas mode needs them in
11 * order to do SIGBUS recovery when a tmpfs mount runs out of room.
12 */
13
14unsigned long __do_user_copy(void *to, const void *from, int n,
15 void **fault_addr, void **fault_catcher,
16 void (*op)(void *to, const void *from,
17 int n), int *faulted_out)
18{
19 unsigned long *faddrp = (unsigned long *) fault_addr, ret;
20
21 sigjmp_buf jbuf;
22 *fault_catcher = &jbuf;
23 if(sigsetjmp(jbuf, 1) == 0){
24 (*op)(to, from, n);
25 ret = 0;
26 *faulted_out = 0;
27 }
28 else {
29 ret = *faddrp;
30 *faulted_out = 1;
31 }
32 *fault_addr = NULL;
33 *fault_catcher = NULL;
34 return ret;
35}
36
37void __do_copy(void *to, const void *from, int n)
38{
39 memcpy(to, from, n);
40}
41
42
43int __do_copy_to_user(void *to, const void *from, int n,
44 void **fault_addr, void **fault_catcher)
45{
46 unsigned long fault;
47 int faulted;
48
49 fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
50 __do_copy, &faulted);
51 if(!faulted) return(0);
52 else return(n - (fault - (unsigned long) to));
53}
54
55/*
56 * Overrides for Emacs so that we follow Linus's tabbing style.
57 * Emacs will notice this stuff at the end of the file and automatically
58 * adjust the settings for this buffer only. This must remain at the end
59 * of the file.
60 * ---------------------------------------------------------------------------
61 * Local variables:
62 * c-file-style: "linux"
63 * End:
64 */
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 93dc782dc1cc..142a9493912b 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -137,7 +137,7 @@ static char *argv1_end = NULL;
137 137
138/* Set in early boot */ 138/* Set in early boot */
139static int have_root __initdata = 0; 139static int have_root __initdata = 0;
140long physmem_size = 32 * 1024 * 1024; 140long long physmem_size = 32 * 1024 * 1024;
141 141
142void set_cmdline(char *cmd) 142void set_cmdline(char *cmd)
143{ 143{
@@ -402,7 +402,7 @@ int linux_main(int argc, char **argv)
402#ifndef CONFIG_HIGHMEM 402#ifndef CONFIG_HIGHMEM
403 highmem = 0; 403 highmem = 0;
404 printf("CONFIG_HIGHMEM not enabled - physical memory shrunk " 404 printf("CONFIG_HIGHMEM not enabled - physical memory shrunk "
405 "to %ld bytes\n", physmem_size); 405 "to %lu bytes\n", physmem_size);
406#endif 406#endif
407 } 407 }
408 408
@@ -414,8 +414,8 @@ int linux_main(int argc, char **argv)
414 414
415 setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); 415 setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
416 if(init_maps(physmem_size, iomem_size, highmem)){ 416 if(init_maps(physmem_size, iomem_size, highmem)){
417 printf("Failed to allocate mem_map for %ld bytes of physical " 417 printf("Failed to allocate mem_map for %lu bytes of physical "
418 "memory and %ld bytes of highmem\n", physmem_size, 418 "memory and %lu bytes of highmem\n", physmem_size,
419 highmem); 419 highmem);
420 exit(1); 420 exit(1);
421 } 421 }
@@ -426,7 +426,7 @@ int linux_main(int argc, char **argv)
426 end_vm = start_vm + virtmem_size; 426 end_vm = start_vm + virtmem_size;
427 427
428 if(virtmem_size < physmem_size) 428 if(virtmem_size < physmem_size)
429 printf("Kernel virtual memory size shrunk to %ld bytes\n", 429 printf("Kernel virtual memory size shrunk to %lu bytes\n",
430 virtmem_size); 430 virtmem_size);
431 431
432 uml_postsetup(); 432 uml_postsetup();
diff --git a/arch/um/kernel/user_util.c b/arch/um/kernel/user_util.c
index 41d17c71511c..4c231161f257 100644
--- a/arch/um/kernel/user_util.c
+++ b/arch/um/kernel/user_util.c
@@ -27,7 +27,6 @@
27#include "user.h" 27#include "user.h"
28#include "mem_user.h" 28#include "mem_user.h"
29#include "init.h" 29#include "init.h"
30#include "helper.h"
31#include "ptrace_user.h" 30#include "ptrace_user.h"
32#include "uml-config.h" 31#include "uml-config.h"
33 32
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index d15ec2af6a22..b83ac8e21c35 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -3,11 +3,12 @@
3# Licensed under the GPL 3# Licensed under the GPL
4# 4#
5 5
6obj-y = aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o time.o \ 6obj-y = aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
7 tt.o tty.o user_syms.o drivers/ sys-$(SUBARCH)/ 7 start_up.o time.o tt.o tty.o uaccess.o user_syms.o drivers/ \
8 sys-$(SUBARCH)/
8 9
9USER_OBJS := aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o \ 10USER_OBJS := aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
10 time.o tt.o tty.o 11 start_up.o time.o tt.o tty.o uaccess.o
11 12
12elf_aux.o: $(ARCH_DIR)/kernel-offsets.h 13elf_aux.o: $(ARCH_DIR)/kernel-offsets.h
13CFLAGS_elf_aux.o += -I$(objtree)/arch/um 14CFLAGS_elf_aux.o += -I$(objtree)/arch/um
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
index 41cfb0944201..ffa759addd3c 100644
--- a/arch/um/os-Linux/aio.c
+++ b/arch/um/os-Linux/aio.c
@@ -10,7 +10,6 @@
10#include <sched.h> 10#include <sched.h>
11#include <sys/syscall.h> 11#include <sys/syscall.h>
12#include "os.h" 12#include "os.h"
13#include "helper.h"
14#include "aio.h" 13#include "aio.h"
15#include "init.h" 14#include "init.h"
16#include "user.h" 15#include "user.h"
diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c
index cd4d6544da71..901b85e8a1c6 100644
--- a/arch/um/os-Linux/drivers/ethertap_user.c
+++ b/arch/um/os-Linux/drivers/ethertap_user.c
@@ -19,7 +19,6 @@
19#include "user_util.h" 19#include "user_util.h"
20#include "net_user.h" 20#include "net_user.h"
21#include "etap.h" 21#include "etap.h"
22#include "helper.h"
23#include "os.h" 22#include "os.h"
24 23
25#define MAX_PACKET ETH_MAX_PACKET 24#define MAX_PACKET ETH_MAX_PACKET
diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c
index 4ba9b17adf13..52945338b64d 100644
--- a/arch/um/os-Linux/drivers/tuntap_user.c
+++ b/arch/um/os-Linux/drivers/tuntap_user.c
@@ -20,7 +20,6 @@
20#include "kern_util.h" 20#include "kern_util.h"
21#include "user_util.h" 21#include "user_util.h"
22#include "user.h" 22#include "user.h"
23#include "helper.h"
24#include "os.h" 23#include "os.h"
25 24
26#define MAX_PACKET ETH_MAX_PACKET 25#define MAX_PACKET ETH_MAX_PACKET
diff --git a/arch/um/kernel/helper.c b/arch/um/os-Linux/helper.c
index 33fb0bd3b11a..36cc8475bcda 100644
--- a/arch/um/kernel/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -1,4 +1,4 @@
1/* 1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) 2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
@@ -13,7 +13,6 @@
13#include "user.h" 13#include "user.h"
14#include "kern_util.h" 14#include "kern_util.h"
15#include "user_util.h" 15#include "user_util.h"
16#include "helper.h"
17#include "os.h" 16#include "os.h"
18 17
19struct helper_data { 18struct helper_data {
@@ -46,7 +45,7 @@ static int helper_child(void *arg)
46 errval = errno; 45 errval = errno;
47 printk("execvp of '%s' failed - errno = %d\n", argv[0], errno); 46 printk("execvp of '%s' failed - errno = %d\n", argv[0], errno);
48 os_write_file(data->fd, &errval, sizeof(errval)); 47 os_write_file(data->fd, &errval, sizeof(errval));
49 os_kill_process(os_getpid(), 0); 48 kill(os_getpid(), SIGKILL);
50 return(0); 49 return(0);
51} 50}
52 51
@@ -90,7 +89,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
90 goto out_close; 89 goto out_close;
91 } 90 }
92 91
93 os_close_file(fds[1]); 92 close(fds[1]);
94 fds[1] = -1; 93 fds[1] = -1;
95 94
96 /*Read the errno value from the child.*/ 95 /*Read the errno value from the child.*/
@@ -98,7 +97,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
98 if(n < 0){ 97 if(n < 0){
99 printk("run_helper : read on pipe failed, ret = %d\n", -n); 98 printk("run_helper : read on pipe failed, ret = %d\n", -n);
100 ret = n; 99 ret = n;
101 os_kill_process(pid, 1); 100 kill(pid, SIGKILL);
101 CATCH_EINTR(waitpid(pid, NULL, 0));
102 } 102 }
103 else if(n != 0){ 103 else if(n != 0){
104 CATCH_EINTR(n = waitpid(pid, NULL, 0)); 104 CATCH_EINTR(n = waitpid(pid, NULL, 0));
@@ -109,8 +109,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
109 109
110out_close: 110out_close:
111 if (fds[1] != -1) 111 if (fds[1] != -1)
112 os_close_file(fds[1]); 112 close(fds[1]);
113 os_close_file(fds[0]); 113 close(fds[0]);
114out_free: 114out_free:
115 if(stack_out == NULL) 115 if(stack_out == NULL)
116 free_stack(stack, 0); 116 free_stack(stack, 0);
@@ -118,7 +118,7 @@ out_free:
118 return(ret); 118 return(ret);
119} 119}
120 120
121int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, 121int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
122 unsigned long *stack_out, int stack_order) 122 unsigned long *stack_out, int stack_order)
123{ 123{
124 unsigned long stack, sp; 124 unsigned long stack, sp;
@@ -131,7 +131,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
131 pid = clone(proc, (void *) sp, flags | SIGCHLD, arg); 131 pid = clone(proc, (void *) sp, flags | SIGCHLD, arg);
132 if(pid < 0){ 132 if(pid < 0){
133 err = -errno; 133 err = -errno;
134 printk("run_helper_thread : clone failed, errno = %d\n", 134 printk("run_helper_thread : clone failed, errno = %d\n",
135 errno); 135 errno);
136 return err; 136 return err;
137 } 137 }
diff --git a/arch/um/kernel/main.c b/arch/um/os-Linux/main.c
index d31027f0fe39..23da27d22569 100644
--- a/arch/um/kernel/main.c
+++ b/arch/um/os-Linux/main.c
@@ -157,25 +157,25 @@ int main(int argc, char **argv, char **envp)
157 */ 157 */
158 change_sig(SIGPROF, 0); 158 change_sig(SIGPROF, 0);
159 159
160 /* This signal stuff used to be in the reboot case. However, 160 /* This signal stuff used to be in the reboot case. However,
161 * sometimes a SIGVTALRM can come in when we're halting (reproducably 161 * sometimes a SIGVTALRM can come in when we're halting (reproducably
162 * when writing out gcov information, presumably because that takes 162 * when writing out gcov information, presumably because that takes
163 * some time) and cause a segfault. 163 * some time) and cause a segfault.
164 */ 164 */
165 165
166 /* stop timers and set SIG*ALRM to be ignored */ 166 /* stop timers and set SIG*ALRM to be ignored */
167 disable_timer(); 167 disable_timer();
168 168
169 /* disable SIGIO for the fds and set SIGIO to be ignored */ 169 /* disable SIGIO for the fds and set SIGIO to be ignored */
170 err = deactivate_all_fds(); 170 err = deactivate_all_fds();
171 if(err) 171 if(err)
172 printf("deactivate_all_fds failed, errno = %d\n", -err); 172 printf("deactivate_all_fds failed, errno = %d\n", -err);
173 173
174 /* Let any pending signals fire now. This ensures 174 /* Let any pending signals fire now. This ensures
175 * that they won't be delivered after the exec, when 175 * that they won't be delivered after the exec, when
176 * they are definitely not expected. 176 * they are definitely not expected.
177 */ 177 */
178 unblock_signals(); 178 unblock_signals();
179 179
180 /* Reboot */ 180 /* Reboot */
181 if(ret){ 181 if(ret){
@@ -257,14 +257,3 @@ void __wrap_free(void *ptr)
257 } 257 }
258 else __real_free(ptr); 258 else __real_free(ptr);
259} 259}
260
261/*
262 * Overrides for Emacs so that we follow Linus's tabbing style.
263 * Emacs will notice this stuff at the end of the file and automatically
264 * adjust the settings for this buffer only. This must remain at the end
265 * of the file.
266 * ---------------------------------------------------------------------------
267 * Local variables:
268 * c-file-style: "linux"
269 * End:
270 */
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 8e71edaaf80b..9d7d69a523bb 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -88,7 +88,7 @@ int make_tempfile(const char *template, char **out_tempname, int do_unlink)
88 * This proc is used in start_up.c 88 * This proc is used in start_up.c
89 * So it isn't 'static'. 89 * So it isn't 'static'.
90 */ 90 */
91int create_tmp_file(unsigned long len) 91int create_tmp_file(unsigned long long len)
92{ 92{
93 int fd, err; 93 int fd, err;
94 char zero; 94 char zero;
@@ -121,7 +121,7 @@ int create_tmp_file(unsigned long len)
121 return(fd); 121 return(fd);
122} 122}
123 123
124static int create_anon_file(unsigned long len) 124static int create_anon_file(unsigned long long len)
125{ 125{
126 void *addr; 126 void *addr;
127 int fd; 127 int fd;
@@ -144,7 +144,7 @@ static int create_anon_file(unsigned long len)
144 144
145extern int have_devanon; 145extern int have_devanon;
146 146
147int create_mem_file(unsigned long len) 147int create_mem_file(unsigned long long len)
148{ 148{
149 int err, fd; 149 int err, fd;
150 150
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index b99ab414542f..37517d49c4ae 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -135,7 +135,9 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode,
135} 135}
136 136
137int ptrace_faultinfo = 1; 137int ptrace_faultinfo = 1;
138int ptrace_ldt = 1;
138int proc_mm = 1; 139int proc_mm = 1;
140int skas_needs_stub = 0;
139 141
140static int __init skas0_cmd_param(char *str, int* add) 142static int __init skas0_cmd_param(char *str, int* add)
141{ 143{
@@ -294,7 +296,7 @@ static void __init check_ptrace(void)
294 check_sysemu(); 296 check_sysemu();
295} 297}
296 298
297extern int create_tmp_file(unsigned long len); 299extern int create_tmp_file(unsigned long long len);
298 300
299static void check_tmpexec(void) 301static void check_tmpexec(void)
300{ 302{
@@ -352,14 +354,26 @@ __uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param,
352" it. To support PTRACE_FAULTINFO, the host needs to be patched\n" 354" it. To support PTRACE_FAULTINFO, the host needs to be patched\n"
353" using the current skas3 patch.\n\n"); 355" using the current skas3 patch.\n\n");
354 356
357static int __init noptraceldt_cmd_param(char *str, int* add)
358{
359 ptrace_ldt = 0;
360 return 0;
361}
362
363__uml_setup("noptraceldt", noptraceldt_cmd_param,
364"noptraceldt\n"
365" Turns off usage of PTRACE_LDT, even if host supports it.\n"
366" To support PTRACE_LDT, the host needs to be patched using\n"
367" the current skas3 patch.\n\n");
368
355#ifdef UML_CONFIG_MODE_SKAS 369#ifdef UML_CONFIG_MODE_SKAS
356static inline void check_skas3_ptrace_support(void) 370static inline void check_skas3_ptrace_faultinfo(void)
357{ 371{
358 struct ptrace_faultinfo fi; 372 struct ptrace_faultinfo fi;
359 void *stack; 373 void *stack;
360 int pid, n; 374 int pid, n;
361 375
362 printf("Checking for the skas3 patch in the host..."); 376 printf(" - PTRACE_FAULTINFO...");
363 pid = start_ptraced_child(&stack); 377 pid = start_ptraced_child(&stack);
364 378
365 n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi); 379 n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi);
@@ -381,9 +395,49 @@ static inline void check_skas3_ptrace_support(void)
381 stop_ptraced_child(pid, stack, 1, 1); 395 stop_ptraced_child(pid, stack, 1, 1);
382} 396}
383 397
384int can_do_skas(void) 398static inline void check_skas3_ptrace_ldt(void)
399{
400#ifdef PTRACE_LDT
401 void *stack;
402 int pid, n;
403 unsigned char ldtbuf[40];
404 struct ptrace_ldt ldt_op = (struct ptrace_ldt) {
405 .func = 2, /* read default ldt */
406 .ptr = ldtbuf,
407 .bytecount = sizeof(ldtbuf)};
408
409 printf(" - PTRACE_LDT...");
410 pid = start_ptraced_child(&stack);
411
412 n = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op);
413 if (n < 0) {
414 if(errno == EIO)
415 printf("not found\n");
416 else {
417 perror("not found");
418 }
419 ptrace_ldt = 0;
420 }
421 else {
422 if(ptrace_ldt)
423 printf("found\n");
424 else
425 printf("found, but use is disabled\n");
426 }
427
428 stop_ptraced_child(pid, stack, 1, 1);
429#else
430 /* PTRACE_LDT might be disabled via cmdline option.
431 * We want to override this, else we might use the stub
432 * without real need
433 */
434 ptrace_ldt = 1;
435#endif
436}
437
438static inline void check_skas3_proc_mm(void)
385{ 439{
386 printf("Checking for /proc/mm..."); 440 printf(" - /proc/mm...");
387 if (os_access("/proc/mm", OS_ACC_W_OK) < 0) { 441 if (os_access("/proc/mm", OS_ACC_W_OK) < 0) {
388 proc_mm = 0; 442 proc_mm = 0;
389 printf("not found\n"); 443 printf("not found\n");
@@ -394,8 +448,19 @@ int can_do_skas(void)
394 else 448 else
395 printf("found\n"); 449 printf("found\n");
396 } 450 }
451}
452
453int can_do_skas(void)
454{
455 printf("Checking for the skas3 patch in the host:\n");
456
457 check_skas3_proc_mm();
458 check_skas3_ptrace_faultinfo();
459 check_skas3_ptrace_ldt();
460
461 if(!proc_mm || !ptrace_faultinfo || !ptrace_ldt)
462 skas_needs_stub = 1;
397 463
398 check_skas3_ptrace_support();
399 return 1; 464 return 1;
400} 465}
401#else 466#else
diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c
new file mode 100644
index 000000000000..38d710158c3d
--- /dev/null
+++ b/arch/um/os-Linux/uaccess.c
@@ -0,0 +1,32 @@
1/*
2 * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
3 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Licensed under the GPL
5 */
6
7#include <setjmp.h>
8#include <string.h>
9
10unsigned long __do_user_copy(void *to, const void *from, int n,
11 void **fault_addr, void **fault_catcher,
12 void (*op)(void *to, const void *from,
13 int n), int *faulted_out)
14{
15 unsigned long *faddrp = (unsigned long *) fault_addr, ret;
16
17 sigjmp_buf jbuf;
18 *fault_catcher = &jbuf;
19 if(sigsetjmp(jbuf, 1) == 0){
20 (*op)(to, from, n);
21 ret = 0;
22 *faulted_out = 0;
23 }
24 else {
25 ret = *faddrp;
26 *faulted_out = 1;
27 }
28 *fault_addr = NULL;
29 *fault_catcher = NULL;
30 return ret;
31}
32
diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules
index 651d9d88b656..b3fbf125709b 100644
--- a/arch/um/scripts/Makefile.rules
+++ b/arch/um/scripts/Makefile.rules
@@ -26,8 +26,13 @@ define unprofile
26 $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1))) 26 $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1)))
27endef 27endef
28 28
29# cmd_make_link checks to see if the $(foo-dir) variable starts with a /. If
30# so, it's considered to be a path relative to $(srcdir) rather than
31# $(srcdir)/arch/$(SUBARCH). This is because x86_64 wants to get ldt.c from
32# arch/um/sys-i386 rather than arch/i386 like the other borrowed files. So,
33# it sets $(ldt.c-dir) to /arch/um/sys-i386.
29quiet_cmd_make_link = SYMLINK $@ 34quiet_cmd_make_link = SYMLINK $@
30cmd_make_link = ln -sf $(srctree)/arch/$(SUBARCH)/$($(notdir $@)-dir)/$(notdir $@) $@ 35cmd_make_link = rm -f $@; ln -sf $(srctree)$(if $(filter-out /%,$($(notdir $@)-dir)),/arch/$(SUBARCH))/$($(notdir $@)-dir)/$(notdir $@) $@
31 36
32# this needs to be before the foreach, because targets does not accept 37# this needs to be before the foreach, because targets does not accept
33# complete paths like $(obj)/$(f). To make sure this works, use a := assignment 38# complete paths like $(obj)/$(f). To make sure this works, use a := assignment
diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c
index 36b5c2c13289..6360f1c958d0 100644
--- a/arch/um/sys-i386/ldt.c
+++ b/arch/um/sys-i386/ldt.c
@@ -3,53 +3,26 @@
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include "linux/stddef.h"
6#include "linux/config.h" 7#include "linux/config.h"
7#include "linux/sched.h" 8#include "linux/sched.h"
8#include "linux/slab.h" 9#include "linux/slab.h"
9#include "linux/types.h" 10#include "linux/types.h"
11#include "linux/errno.h"
10#include "asm/uaccess.h" 12#include "asm/uaccess.h"
11#include "asm/ptrace.h"
12#include "asm/smp.h" 13#include "asm/smp.h"
13#include "asm/ldt.h" 14#include "asm/ldt.h"
15#include "asm/unistd.h"
14#include "choose-mode.h" 16#include "choose-mode.h"
15#include "kern.h" 17#include "kern.h"
16#include "mode_kern.h" 18#include "mode_kern.h"
17 19
18#ifdef CONFIG_MODE_TT
19
20extern int modify_ldt(int func, void *ptr, unsigned long bytecount); 20extern int modify_ldt(int func, void *ptr, unsigned long bytecount);
21 21
22static int do_modify_ldt_tt(int func, void *ptr, unsigned long bytecount) 22#ifdef CONFIG_MODE_TT
23{
24 return modify_ldt(func, ptr, bytecount);
25}
26
27#endif
28
29#ifdef CONFIG_MODE_SKAS
30
31#include "skas.h"
32#include "skas_ptrace.h"
33
34static int do_modify_ldt_skas(int func, void *ptr, unsigned long bytecount)
35{
36 struct ptrace_ldt ldt;
37 u32 cpu;
38 int res;
39
40 ldt = ((struct ptrace_ldt) { .func = func,
41 .ptr = ptr,
42 .bytecount = bytecount });
43
44 cpu = get_cpu();
45 res = ptrace(PTRACE_LDT, userspace_pid[cpu], 0, (unsigned long) &ldt);
46 put_cpu();
47
48 return res;
49}
50#endif
51 23
52int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) 24static long do_modify_ldt_tt(int func, void __user *ptr,
25 unsigned long bytecount)
53{ 26{
54 struct user_desc info; 27 struct user_desc info;
55 int res = 0; 28 int res = 0;
@@ -89,8 +62,7 @@ int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
89 goto out; 62 goto out;
90 } 63 }
91 64
92 res = CHOOSE_MODE_PROC(do_modify_ldt_tt, do_modify_ldt_skas, func, 65 res = modify_ldt(func, p, bytecount);
93 p, bytecount);
94 if(res < 0) 66 if(res < 0)
95 goto out; 67 goto out;
96 68
@@ -108,3 +80,467 @@ out:
108 kfree(buf); 80 kfree(buf);
109 return res; 81 return res;
110} 82}
83
84#endif
85
86#ifdef CONFIG_MODE_SKAS
87
88#include "skas.h"
89#include "skas_ptrace.h"
90#include "asm/mmu_context.h"
91
92long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc,
93 void **addr, int done)
94{
95 long res;
96
97 if(proc_mm){
98 /* This is a special handling for the case, that the mm to
99 * modify isn't current->active_mm.
100 * If this is called directly by modify_ldt,
101 * (current->active_mm->context.skas.u == mm_idp)
102 * will be true. So no call to switch_mm_skas(mm_idp) is done.
103 * If this is called in case of init_new_ldt or PTRACE_LDT,
104 * mm_idp won't belong to current->active_mm, but child->mm.
105 * So we need to switch child's mm into our userspace, then
106 * later switch back.
107 *
108 * Note: I'm unshure: should interrupts be disabled here?
109 */
110 if(!current->active_mm || current->active_mm == &init_mm ||
111 mm_idp != &current->active_mm->context.skas.id)
112 switch_mm_skas(mm_idp);
113 }
114
115 if(ptrace_ldt) {
116 struct ptrace_ldt ldt_op = (struct ptrace_ldt) {
117 .func = func,
118 .ptr = desc,
119 .bytecount = sizeof(*desc)};
120 u32 cpu;
121 int pid;
122
123 if(!proc_mm)
124 pid = mm_idp->u.pid;
125 else {
126 cpu = get_cpu();
127 pid = userspace_pid[cpu];
128 }
129
130 res = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op);
131 if(res)
132 res = errno;
133
134 if(proc_mm)
135 put_cpu();
136 }
137 else {
138 void *stub_addr;
139 res = syscall_stub_data(mm_idp, (unsigned long *)desc,
140 (sizeof(*desc) + sizeof(long) - 1) &
141 ~(sizeof(long) - 1),
142 addr, &stub_addr);
143 if(!res){
144 unsigned long args[] = { func,
145 (unsigned long)stub_addr,
146 sizeof(*desc),
147 0, 0, 0 };
148 res = run_syscall_stub(mm_idp, __NR_modify_ldt, args,
149 0, addr, done);
150 }
151 }
152
153 if(proc_mm){
154 /* This is the second part of special handling, that makes
155 * PTRACE_LDT possible to implement.
156 */
157 if(current->active_mm && current->active_mm != &init_mm &&
158 mm_idp != &current->active_mm->context.skas.id)
159 switch_mm_skas(&current->active_mm->context.skas.id);
160 }
161
162 return res;
163}
164
165static long read_ldt_from_host(void __user * ptr, unsigned long bytecount)
166{
167 int res, n;
168 struct ptrace_ldt ptrace_ldt = (struct ptrace_ldt) {
169 .func = 0,
170 .bytecount = bytecount,
171 .ptr = (void *)kmalloc(bytecount, GFP_KERNEL)};
172 u32 cpu;
173
174 if(ptrace_ldt.ptr == NULL)
175 return -ENOMEM;
176
177 /* This is called from sys_modify_ldt only, so userspace_pid gives
178 * us the right number
179 */
180
181 cpu = get_cpu();
182 res = ptrace(PTRACE_LDT, userspace_pid[cpu], 0,
183 (unsigned long) &ptrace_ldt);
184 put_cpu();
185 if(res < 0)
186 goto out;
187
188 n = copy_to_user(ptr, ptrace_ldt.ptr, res);
189 if(n != 0)
190 res = -EFAULT;
191
192 out:
193 kfree(ptrace_ldt.ptr);
194
195 return res;
196}
197
198/*
199 * In skas mode, we hold our own ldt data in UML.
200 * Thus, the code implementing sys_modify_ldt_skas
201 * is very similar to (and mostly stolen from) sys_modify_ldt
202 * for arch/i386/kernel/ldt.c
203 * The routines copied and modified in part are:
204 * - read_ldt
205 * - read_default_ldt
206 * - write_ldt
207 * - sys_modify_ldt_skas
208 */
209
210static int read_ldt(void __user * ptr, unsigned long bytecount)
211{
212 int i, err = 0;
213 unsigned long size;
214 uml_ldt_t * ldt = &current->mm->context.skas.ldt;
215
216 if(!ldt->entry_count)
217 goto out;
218 if(bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
219 bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
220 err = bytecount;
221
222 if(ptrace_ldt){
223 return read_ldt_from_host(ptr, bytecount);
224 }
225
226 down(&ldt->semaphore);
227 if(ldt->entry_count <= LDT_DIRECT_ENTRIES){
228 size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES;
229 if(size > bytecount)
230 size = bytecount;
231 if(copy_to_user(ptr, ldt->entries, size))
232 err = -EFAULT;
233 bytecount -= size;
234 ptr += size;
235 }
236 else {
237 for(i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount;
238 i++){
239 size = PAGE_SIZE;
240 if(size > bytecount)
241 size = bytecount;
242 if(copy_to_user(ptr, ldt->pages[i], size)){
243 err = -EFAULT;
244 break;
245 }
246 bytecount -= size;
247 ptr += size;
248 }
249 }
250 up(&ldt->semaphore);
251
252 if(bytecount == 0 || err == -EFAULT)
253 goto out;
254
255 if(clear_user(ptr, bytecount))
256 err = -EFAULT;
257
258out:
259 return err;
260}
261
262static int read_default_ldt(void __user * ptr, unsigned long bytecount)
263{
264 int err;
265
266 if(bytecount > 5*LDT_ENTRY_SIZE)
267 bytecount = 5*LDT_ENTRY_SIZE;
268
269 err = bytecount;
270 /* UML doesn't support lcall7 and lcall27.
271 * So, we don't really have a default ldt, but emulate
272 * an empty ldt of common host default ldt size.
273 */
274 if(clear_user(ptr, bytecount))
275 err = -EFAULT;
276
277 return err;
278}
279
280static int write_ldt(void __user * ptr, unsigned long bytecount, int func)
281{
282 uml_ldt_t * ldt = &current->mm->context.skas.ldt;
283 struct mm_id * mm_idp = &current->mm->context.skas.id;
284 int i, err;
285 struct user_desc ldt_info;
286 struct ldt_entry entry0, *ldt_p;
287 void *addr = NULL;
288
289 err = -EINVAL;
290 if(bytecount != sizeof(ldt_info))
291 goto out;
292 err = -EFAULT;
293 if(copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
294 goto out;
295
296 err = -EINVAL;
297 if(ldt_info.entry_number >= LDT_ENTRIES)
298 goto out;
299 if(ldt_info.contents == 3){
300 if (func == 1)
301 goto out;
302 if (ldt_info.seg_not_present == 0)
303 goto out;
304 }
305
306 if(!ptrace_ldt)
307 down(&ldt->semaphore);
308
309 err = write_ldt_entry(mm_idp, func, &ldt_info, &addr, 1);
310 if(err)
311 goto out_unlock;
312 else if(ptrace_ldt) {
313 /* With PTRACE_LDT available, this is used as a flag only */
314 ldt->entry_count = 1;
315 goto out;
316 }
317
318 if(ldt_info.entry_number >= ldt->entry_count &&
319 ldt_info.entry_number >= LDT_DIRECT_ENTRIES){
320 for(i=ldt->entry_count/LDT_ENTRIES_PER_PAGE;
321 i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number;
322 i++){
323 if(i == 0)
324 memcpy(&entry0, ldt->entries, sizeof(entry0));
325 ldt->pages[i] = (struct ldt_entry *)
326 __get_free_page(GFP_KERNEL|__GFP_ZERO);
327 if(!ldt->pages[i]){
328 err = -ENOMEM;
329 /* Undo the change in host */
330 memset(&ldt_info, 0, sizeof(ldt_info));
331 write_ldt_entry(mm_idp, 1, &ldt_info, &addr, 1);
332 goto out_unlock;
333 }
334 if(i == 0) {
335 memcpy(ldt->pages[0], &entry0, sizeof(entry0));
336 memcpy(ldt->pages[0]+1, ldt->entries+1,
337 sizeof(entry0)*(LDT_DIRECT_ENTRIES-1));
338 }
339 ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE;
340 }
341 }
342 if(ldt->entry_count <= ldt_info.entry_number)
343 ldt->entry_count = ldt_info.entry_number + 1;
344
345 if(ldt->entry_count <= LDT_DIRECT_ENTRIES)
346 ldt_p = ldt->entries + ldt_info.entry_number;
347 else
348 ldt_p = ldt->pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] +
349 ldt_info.entry_number%LDT_ENTRIES_PER_PAGE;
350
351 if(ldt_info.base_addr == 0 && ldt_info.limit == 0 &&
352 (func == 1 || LDT_empty(&ldt_info))){
353 ldt_p->a = 0;
354 ldt_p->b = 0;
355 }
356 else{
357 if (func == 1)
358 ldt_info.useable = 0;
359 ldt_p->a = LDT_entry_a(&ldt_info);
360 ldt_p->b = LDT_entry_b(&ldt_info);
361 }
362 err = 0;
363
364out_unlock:
365 up(&ldt->semaphore);
366out:
367 return err;
368}
369
370static long do_modify_ldt_skas(int func, void __user *ptr,
371 unsigned long bytecount)
372{
373 int ret = -ENOSYS;
374
375 switch (func) {
376 case 0:
377 ret = read_ldt(ptr, bytecount);
378 break;
379 case 1:
380 case 0x11:
381 ret = write_ldt(ptr, bytecount, func);
382 break;
383 case 2:
384 ret = read_default_ldt(ptr, bytecount);
385 break;
386 }
387 return ret;
388}
389
390short dummy_list[9] = {0, -1};
391short * host_ldt_entries = NULL;
392
393void ldt_get_host_info(void)
394{
395 long ret;
396 struct ldt_entry * ldt;
397 int i, size, k, order;
398
399 host_ldt_entries = dummy_list+1;
400
401 for(i = LDT_PAGES_MAX-1, order=0; i; i>>=1, order++);
402
403 ldt = (struct ldt_entry *)
404 __get_free_pages(GFP_KERNEL|__GFP_ZERO, order);
405 if(ldt == NULL) {
406 printk("ldt_get_host_info: couldn't allocate buffer for host ldt\n");
407 return;
408 }
409
410 ret = modify_ldt(0, ldt, (1<<order)*PAGE_SIZE);
411 if(ret < 0) {
412 printk("ldt_get_host_info: couldn't read host ldt\n");
413 goto out_free;
414 }
415 if(ret == 0) {
416 /* default_ldt is active, simply write an empty entry 0 */
417 host_ldt_entries = dummy_list;
418 goto out_free;
419 }
420
421 for(i=0, size=0; i<ret/LDT_ENTRY_SIZE; i++){
422 if(ldt[i].a != 0 || ldt[i].b != 0)
423 size++;
424 }
425
426 if(size < sizeof(dummy_list)/sizeof(dummy_list[0])) {
427 host_ldt_entries = dummy_list;
428 }
429 else {
430 size = (size + 1) * sizeof(dummy_list[0]);
431 host_ldt_entries = (short *)kmalloc(size, GFP_KERNEL);
432 if(host_ldt_entries == NULL) {
433 printk("ldt_get_host_info: couldn't allocate host ldt list\n");
434 goto out_free;
435 }
436 }
437
438 for(i=0, k=0; i<ret/LDT_ENTRY_SIZE; i++){
439 if(ldt[i].a != 0 || ldt[i].b != 0) {
440 host_ldt_entries[k++] = i;
441 }
442 }
443 host_ldt_entries[k] = -1;
444
445out_free:
446 free_pages((unsigned long)ldt, order);
447}
448
449long init_new_ldt(struct mmu_context_skas * new_mm,
450 struct mmu_context_skas * from_mm)
451{
452 struct user_desc desc;
453 short * num_p;
454 int i;
455 long page, err=0;
456 void *addr = NULL;
457
458 memset(&desc, 0, sizeof(desc));
459
460 if(!ptrace_ldt)
461 init_MUTEX(&new_mm->ldt.semaphore);
462
463 if(!from_mm){
464 /*
465 * We have to initialize a clean ldt.
466 */
467 if(proc_mm) {
468 /*
469 * If the new mm was created using proc_mm, host's
470 * default-ldt currently is assigned, which normally
471 * contains the call-gates for lcall7 and lcall27.
472 * To remove these gates, we simply write an empty
473 * entry as number 0 to the host.
474 */
475 err = write_ldt_entry(&new_mm->id, 1, &desc,
476 &addr, 1);
477 }
478 else{
479 /*
480 * Now we try to retrieve info about the ldt, we
481 * inherited from the host. All ldt-entries found
482 * will be reset in the following loop
483 */
484 if(host_ldt_entries == NULL)
485 ldt_get_host_info();
486 for(num_p=host_ldt_entries; *num_p != -1; num_p++){
487 desc.entry_number = *num_p;
488 err = write_ldt_entry(&new_mm->id, 1, &desc,
489 &addr, *(num_p + 1) == -1);
490 if(err)
491 break;
492 }
493 }
494 new_mm->ldt.entry_count = 0;
495 }
496 else if (!ptrace_ldt) {
497 /* Our local LDT is used to supply the data for
498 * modify_ldt(READLDT), if PTRACE_LDT isn't available,
499 * i.e., we have to use the stub for modify_ldt, which
500 * can't handle the big read buffer of up to 64kB.
501 */
502 down(&from_mm->ldt.semaphore);
503 if(from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES){
504 memcpy(new_mm->ldt.entries, from_mm->ldt.entries,
505 sizeof(new_mm->ldt.entries));
506 }
507 else{
508 i = from_mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE;
509 while(i-->0){
510 page = __get_free_page(GFP_KERNEL|__GFP_ZERO);
511 if (!page){
512 err = -ENOMEM;
513 break;
514 }
515 new_mm->ldt.pages[i] = (struct ldt_entry*)page;
516 memcpy(new_mm->ldt.pages[i],
517 from_mm->ldt.pages[i], PAGE_SIZE);
518 }
519 }
520 new_mm->ldt.entry_count = from_mm->ldt.entry_count;
521 up(&from_mm->ldt.semaphore);
522 }
523
524 return err;
525}
526
527
528void free_ldt(struct mmu_context_skas * mm)
529{
530 int i;
531
532 if(!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES){
533 i = mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE;
534 while(i-- > 0){
535 free_page((long )mm->ldt.pages[i]);
536 }
537 }
538 mm->ldt.entry_count = 0;
539}
540#endif
541
542int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
543{
544 return(CHOOSE_MODE_PROC(do_modify_ldt_tt, do_modify_ldt_skas, func,
545 ptr, bytecount));
546}
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 06c3633457a2..ea977df395a1 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -5,7 +5,7 @@
5# 5#
6 6
7#XXX: why into lib-y? 7#XXX: why into lib-y?
8lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \ 8lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o ldt.o mem.o memcpy.o \
9 ptrace.o ptrace_user.o sigcontext.o signal.o stub.o \ 9 ptrace.o ptrace_user.o sigcontext.o signal.o stub.o \
10 stub_segv.o syscalls.o syscall_table.o sysrq.o thunk.o 10 stub_segv.o syscalls.o syscall_table.o sysrq.o thunk.o
11 11
@@ -14,7 +14,7 @@ obj-$(CONFIG_MODULES) += module.o um_module.o
14 14
15USER_OBJS := ptrace_user.o sigcontext.o 15USER_OBJS := ptrace_user.o sigcontext.o
16 16
17SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c memcpy.S \ 17SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c ldt.c memcpy.S \
18 thunk.S module.c 18 thunk.S module.c
19 19
20include arch/um/scripts/Makefile.rules 20include arch/um/scripts/Makefile.rules
@@ -23,6 +23,7 @@ bitops.c-dir = lib
23csum-copy.S-dir = lib 23csum-copy.S-dir = lib
24csum-partial.c-dir = lib 24csum-partial.c-dir = lib
25csum-wrappers.c-dir = lib 25csum-wrappers.c-dir = lib
26ldt.c-dir = /arch/um/sys-i386
26memcpy.S-dir = lib 27memcpy.S-dir = lib
27thunk.S-dir = lib 28thunk.S-dir = lib
28module.c-dir = kernel 29module.c-dir = kernel
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index 3259a4db4534..6acee5c4ada6 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -29,81 +29,6 @@ asmlinkage long sys_uname64(struct new_utsname __user * name)
29} 29}
30 30
31#ifdef CONFIG_MODE_TT 31#ifdef CONFIG_MODE_TT
32extern int modify_ldt(int func, void *ptr, unsigned long bytecount);
33
34long sys_modify_ldt_tt(int func, void *ptr, unsigned long bytecount)
35{
36 /* XXX This should check VERIFY_WRITE depending on func, check this
37 * in i386 as well.
38 */
39 if (!access_ok(VERIFY_READ, ptr, bytecount))
40 return -EFAULT;
41 return(modify_ldt(func, ptr, bytecount));
42}
43#endif
44
45#ifdef CONFIG_MODE_SKAS
46extern int userspace_pid[];
47
48#include "skas_ptrace.h"
49
50long sys_modify_ldt_skas(int func, void *ptr, unsigned long bytecount)
51{
52 struct ptrace_ldt ldt;
53 void *buf;
54 int res, n;
55
56 buf = kmalloc(bytecount, GFP_KERNEL);
57 if(buf == NULL)
58 return(-ENOMEM);
59
60 res = 0;
61
62 switch(func){
63 case 1:
64 case 0x11:
65 res = copy_from_user(buf, ptr, bytecount);
66 break;
67 }
68
69 if(res != 0){
70 res = -EFAULT;
71 goto out;
72 }
73
74 ldt = ((struct ptrace_ldt) { .func = func,
75 .ptr = buf,
76 .bytecount = bytecount });
77#warning Need to look up userspace_pid by cpu
78 res = ptrace(PTRACE_LDT, userspace_pid[0], 0, (unsigned long) &ldt);
79 if(res < 0)
80 goto out;
81
82 switch(func){
83 case 0:
84 case 2:
85 n = res;
86 res = copy_to_user(ptr, buf, n);
87 if(res != 0)
88 res = -EFAULT;
89 else
90 res = n;
91 break;
92 }
93
94 out:
95 kfree(buf);
96 return(res);
97}
98#endif
99
100long sys_modify_ldt(int func, void *ptr, unsigned long bytecount)
101{
102 return(CHOOSE_MODE_PROC(sys_modify_ldt_tt, sys_modify_ldt_skas, func,
103 ptr, bytecount));
104}
105
106#ifdef CONFIG_MODE_TT
107extern long arch_prctl(int code, unsigned long addr); 32extern long arch_prctl(int code, unsigned long addr);
108 33
109static long arch_prctl_tt(int code, unsigned long addr) 34static long arch_prctl_tt(int code, unsigned long addr)
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-08 00:46:12 -0400