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-rw-r--r--arch/um/Kconfig10
-rw-r--r--arch/um/Kconfig.char (renamed from arch/um/Kconfig_char)0
-rw-r--r--arch/um/Kconfig.debug11
-rw-r--r--arch/um/Kconfig.i386 (renamed from arch/um/Kconfig_i386)4
-rw-r--r--arch/um/Kconfig.net (renamed from arch/um/Kconfig_net)12
-rw-r--r--arch/um/Kconfig.scsi (renamed from arch/um/Kconfig_scsi)0
-rw-r--r--arch/um/Kconfig.x86_64 (renamed from arch/um/Kconfig_x86_64)8
-rw-r--r--arch/um/Makefile9
-rw-r--r--arch/um/Makefile-i3862
-rw-r--r--arch/um/Makefile-x86_642
-rw-r--r--arch/um/drivers/Makefile2
-rw-r--r--arch/um/drivers/chan_user.c11
-rw-r--r--arch/um/drivers/ubd_kern.c570
-rw-r--r--arch/um/include/aio.h40
-rw-r--r--arch/um/include/common-offsets.h1
-rw-r--r--arch/um/include/init.h10
-rw-r--r--arch/um/include/irq_kern.h3
-rw-r--r--arch/um/include/os.h15
-rw-r--r--arch/um/include/syscall.h12
-rw-r--r--arch/um/include/syscall_user.h23
-rw-r--r--arch/um/include/sysdep-i386/syscalls.h2
-rw-r--r--arch/um/include/sysdep-x86_64/ptrace.h2
-rw-r--r--arch/um/include/sysdep-x86_64/syscalls.h2
-rw-r--r--arch/um/include/tlb.h22
-rw-r--r--arch/um/include/um_uaccess.h7
-rw-r--r--arch/um/include/user_util.h8
-rw-r--r--arch/um/kernel/Makefile15
-rw-r--r--arch/um/kernel/irq.c41
-rw-r--r--arch/um/kernel/ksyms.c19
-rw-r--r--arch/um/kernel/main.c2
-rw-r--r--arch/um/kernel/mem.c2
-rw-r--r--arch/um/kernel/skas/Makefile2
-rw-r--r--arch/um/kernel/skas/include/mmu-skas.h4
-rw-r--r--arch/um/kernel/skas/include/skas.h30
-rw-r--r--arch/um/kernel/skas/mem_user.c224
-rw-r--r--arch/um/kernel/skas/mmu.c61
-rw-r--r--arch/um/kernel/skas/process.c69
-rw-r--r--arch/um/kernel/skas/process_kern.c7
-rw-r--r--arch/um/kernel/skas/syscall.c50
-rw-r--r--arch/um/kernel/skas/syscall_kern.c43
-rw-r--r--arch/um/kernel/skas/syscall_user.c44
-rw-r--r--arch/um/kernel/skas/tlb.c28
-rw-r--r--arch/um/kernel/syscall.c36
-rw-r--r--arch/um/kernel/syscall_user.c48
-rw-r--r--arch/um/kernel/tlb.c267
-rw-r--r--arch/um/kernel/trap_kern.c55
-rw-r--r--arch/um/kernel/trap_user.c21
-rw-r--r--arch/um/kernel/tt/syscall_kern.c47
-rw-r--r--arch/um/kernel/tt/syscall_user.c35
-rw-r--r--arch/um/kernel/tt/tlb.c26
-rw-r--r--arch/um/kernel/um_arch.c8
-rw-r--r--arch/um/os-Linux/Makefile14
-rw-r--r--arch/um/os-Linux/aio.c414
-rw-r--r--arch/um/os-Linux/elf_aux.c3
-rw-r--r--arch/um/os-Linux/process.c58
-rw-r--r--arch/um/os-Linux/start_up.c (renamed from arch/um/kernel/process.c)224
-rw-r--r--arch/um/os-Linux/tt.c113
-rw-r--r--arch/um/scripts/Makefile.unmap2
-rw-r--r--arch/um/sys-i386/Makefile8
-rw-r--r--arch/um/sys-i386/kernel-offsets.c1
-rw-r--r--arch/um/sys-i386/signal.c2
-rw-r--r--arch/um/sys-i386/stub.S47
-rw-r--r--arch/um/sys-i386/stub_segv.c3
-rw-r--r--arch/um/sys-x86_64/Makefile13
-rw-r--r--arch/um/sys-x86_64/kernel-offsets.c1
-rw-r--r--arch/um/sys-x86_64/signal.c41
-rw-r--r--arch/um/sys-x86_64/stub.S51
-rw-r--r--arch/um/sys-x86_64/stub_segv.c3
68 files changed, 1823 insertions, 1147 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index f945444df49..684e1f8b275 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -73,7 +73,7 @@ config MODE_SKAS
to CONFIG_MODE_TT). Otherwise, it is safe to say Y. Disabling this
option will shrink the UML binary slightly.
-source "arch/um/Kconfig_arch"
+source "arch/um/Kconfig.arch"
source "mm/Kconfig"
config LD_SCRIPT_STATIC
@@ -196,7 +196,7 @@ config HOST_2G_2G
config SMP
bool "Symmetric multi-processing support (EXPERIMENTAL)"
default n
- depends on MODE_TT && EXPERIMENTAL
+ depends on (MODE_TT && EXPERIMENTAL && !SMP_BROKEN) || (BROKEN && SMP_BROKEN)
help
This option enables UML SMP support.
It is NOT related to having a real SMP box. Not directly, at least.
@@ -279,7 +279,7 @@ source "net/Kconfig"
source "drivers/base/Kconfig"
-source "arch/um/Kconfig_char"
+source "arch/um/Kconfig.char"
source "drivers/block/Kconfig"
@@ -287,7 +287,7 @@ config NETDEVICES
bool
default NET
-source "arch/um/Kconfig_net"
+source "arch/um/Kconfig.net"
source "drivers/net/Kconfig"
@@ -311,7 +311,7 @@ config GENERIC_ISA_DMA
depends on SCSI
default y
-source "arch/um/Kconfig_scsi"
+source "arch/um/Kconfig.scsi"
endmenu
diff --git a/arch/um/Kconfig_char b/arch/um/Kconfig.char
index 62d87b71179..62d87b71179 100644
--- a/arch/um/Kconfig_char
+++ b/arch/um/Kconfig.char
diff --git a/arch/um/Kconfig.debug b/arch/um/Kconfig.debug
index bd41e4286d0..5681a8bd370 100644
--- a/arch/um/Kconfig.debug
+++ b/arch/um/Kconfig.debug
@@ -2,6 +2,17 @@ menu "Kernel hacking"
source "lib/Kconfig.debug"
+config CMDLINE_ON_HOST
+ bool "Show command line arguments on the host in TT mode"
+ depends on MODE_TT
+ default !DEBUG_INFO
+ help
+ This controls whether arguments in guest processes should be shown on
+ the host's ps output.
+ Enabling this option hinders debugging on some recent GDB versions
+ (because GDB gets "confused" when we do an execvp()). So probably you
+ should disable it.
+
config PT_PROXY
bool "Enable ptrace proxy"
depends on XTERM_CHAN && DEBUG_INFO && MODE_TT
diff --git a/arch/um/Kconfig_i386 b/arch/um/Kconfig.i386
index 27c18a8d9d1..8ad156a0049 100644
--- a/arch/um/Kconfig_i386
+++ b/arch/um/Kconfig.i386
@@ -6,6 +6,10 @@ config 64BIT
bool
default n
+config SEMAPHORE_SLEEPERS
+ bool
+ default y
+
config TOP_ADDR
hex
default 0xc0000000 if !HOST_2G_2G
diff --git a/arch/um/Kconfig_net b/arch/um/Kconfig.net
index fa2ab2dd78b..14a04ebdeae 100644
--- a/arch/um/Kconfig_net
+++ b/arch/um/Kconfig.net
@@ -34,7 +34,7 @@ config UML_NET_ETHERTAP
link with the host.
To use this, your host kernel must have support for Ethertap
- devices. Also, if your host kernel is 2.4.x, it must have
+ devices. Also, if your host kernel is 2.4.x, it must have
CONFIG_NETLINK_DEV configured as Y or M.
For more information, see
@@ -43,7 +43,7 @@ config UML_NET_ETHERTAP
networking.
If you'd like to set up an IP network with the host and/or the
- outside world, say Y to this, the Daemon Transport and/or the
+ outside world, say Y to this, the Daemon Transport and/or the
Slip Transport. You'll need at least one of them, but may choose
more than one without conflict. If you don't need UML networking,
say N.
@@ -78,7 +78,7 @@ config UML_NET_SLIP
The Ethertap Transport is preferred over slip because of its
limitations. If you prefer slip, however, say Y here. Otherwise
- choose the Multicast transport (to network multiple UMLs on
+ choose the Multicast transport (to network multiple UMLs on
multiple hosts), Ethertap (to network with the host and the
outside world), and/or the Daemon transport (to network multiple
UMLs on a single host). You may choose more than one without
@@ -138,7 +138,7 @@ config UML_NET_PCAP
depends on UML_NET && EXPERIMENTAL
help
The pcap transport makes a pcap packet stream on the host look
- like an ethernet device inside UML. This is useful for making
+ like an ethernet device inside UML. This is useful for making
UML act as a network monitor for the host. You must have libcap
installed in order to build the pcap transport into UML.
@@ -169,11 +169,11 @@ config UML_NET_SLIRP
setup string. The effect of this transport on the UML is similar
that of a host behind a firewall that masquerades all network
connections passing through it (but is less secure).
-
+
To use this you should first have slirp compiled somewhere
accessible on the host, and have read its documentation. If you
don't need UML networking, say N.
-
+
Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp"
endmenu
diff --git a/arch/um/Kconfig_scsi b/arch/um/Kconfig.scsi
index c291c942b1a..c291c942b1a 100644
--- a/arch/um/Kconfig_scsi
+++ b/arch/um/Kconfig.scsi
diff --git a/arch/um/Kconfig_x86_64 b/arch/um/Kconfig.x86_64
index 735a047c890..bd35e59419c 100644
--- a/arch/um/Kconfig_x86_64
+++ b/arch/um/Kconfig.x86_64
@@ -6,6 +6,10 @@ config 64BIT
bool
default y
+config SEMAPHORE_SLEEPERS
+ bool
+ default y
+
config TOP_ADDR
hex
default 0x80000000
@@ -33,3 +37,7 @@ config ARCH_HAS_SC_SIGNALS
config ARCH_REUSE_HOST_VSYSCALL_AREA
bool
default n
+
+config SMP_BROKEN
+ bool
+ default y
diff --git a/arch/um/Makefile b/arch/um/Makefile
index f5a83a72aa7..b15f6048caa 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -56,6 +56,7 @@ SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap
+AFLAGS += $(ARCH_INCLUDE)
USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
@@ -101,10 +102,10 @@ define archhelp
endef
ifneq ($(KBUILD_SRC),)
-$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig_$(SUBARCH) $(ARCH_DIR)/Kconfig_arch)
-CLEAN_FILES += $(ARCH_DIR)/Kconfig_arch
+$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
+CLEAN_FILES += $(ARCH_DIR)/Kconfig.arch
else
-$(shell cd $(ARCH_DIR) && ln -sf Kconfig_$(SUBARCH) Kconfig_arch)
+$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
endif
prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
@@ -147,7 +148,7 @@ CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
$(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \
- $(ARCH_DIR)/Kconfig_arch
+ $(ARCH_DIR)/Kconfig.arch
archclean:
$(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index a777e57dbf8..1ab431a53ac 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -27,7 +27,7 @@ export LDFLAGS HOSTCFLAGS HOSTLDFLAGS UML_OBJCOPYFLAGS
endif
endif
-CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) $(STUB_CFLAGS)
+CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH)
ifneq ($(CONFIG_GPROF),y)
ARCH_CFLAGS += -DUM_FASTCALL
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index aa2f7174ebc..baddb5d64ca 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -6,7 +6,7 @@ START := 0x60000000
#We #undef __x86_64__ for kernelspace, not for userspace where
#it's needed for headers to work!
-CFLAGS += -U__$(SUBARCH)__ -fno-builtin $(STUB_CFLAGS)
+CFLAGS += -U__$(SUBARCH)__ -fno-builtin
USER_CFLAGS += -fno-builtin
ELF_ARCH := i386:x86-64
diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
index de17d4c6e02..783e18cae09 100644
--- a/arch/um/drivers/Makefile
+++ b/arch/um/drivers/Makefile
@@ -13,7 +13,7 @@ mcast-objs := mcast_kern.o mcast_user.o
net-objs := net_kern.o net_user.o
mconsole-objs := mconsole_kern.o mconsole_user.o
hostaudio-objs := hostaudio_kern.o
-ubd-objs := ubd_kern.o ubd_user.o
+ubd-objs := ubd_kern.o
port-objs := port_kern.o port_user.o
harddog-objs := harddog_kern.o harddog_user.o
diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index 5d3768156c9..de3bce71aeb 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -63,7 +63,7 @@ error:
*
* SIGWINCH can't be received synchronously, so you have to set up to receive it
* as a signal. That being the case, if you are going to wait for it, it is
- * convenient to sit in a pause() and wait for the signal to bounce you out of
+ * convenient to sit in sigsuspend() and wait for the signal to bounce you out of
* it (see below for how we make sure to exit only on SIGWINCH).
*/
@@ -94,18 +94,19 @@ static int winch_thread(void *arg)
"byte, err = %d\n", -count);
/* We are not using SIG_IGN on purpose, so don't fix it as I thought to
- * do! If using SIG_IGN, the pause() call below would not stop on
+ * do! If using SIG_IGN, the sigsuspend() call below would not stop on
* SIGWINCH. */
signal(SIGWINCH, winch_handler);
sigfillset(&sigs);
- sigdelset(&sigs, SIGWINCH);
- /* Block anything else than SIGWINCH. */
+ /* Block all signals possible. */
if(sigprocmask(SIG_SETMASK, &sigs, NULL) < 0){
printk("winch_thread : sigprocmask failed, errno = %d\n",
errno);
exit(1);
}
+ /* In sigsuspend(), block anything else than SIGWINCH. */
+ sigdelset(&sigs, SIGWINCH);
if(setsid() < 0){
printk("winch_thread : setsid failed, errno = %d\n", errno);
@@ -130,7 +131,7 @@ static int winch_thread(void *arg)
while(1){
/* This will be interrupted by SIGWINCH only, since other signals
* are blocked.*/
- pause();
+ sigsuspend(&sigs);
count = os_write_file(pipe_fd, &c, sizeof(c));
if(count != sizeof(c))
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 344b24d09a7..e77a38da435 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -35,6 +35,7 @@
#include "linux/blkpg.h"
#include "linux/genhd.h"
#include "linux/spinlock.h"
+#include "asm/atomic.h"
#include "asm/segment.h"
#include "asm/uaccess.h"
#include "asm/irq.h"
@@ -53,20 +54,21 @@
#include "mem.h"
#include "mem_kern.h"
#include "cow.h"
+#include "aio.h"
enum ubd_req { UBD_READ, UBD_WRITE };
struct io_thread_req {
- enum ubd_req op;
+ enum aio_type op;
int fds[2];
unsigned long offsets[2];
unsigned long long offset;
unsigned long length;
char *buffer;
int sectorsize;
- unsigned long sector_mask;
- unsigned long long cow_offset;
- unsigned long bitmap_words[2];
+ int bitmap_offset;
+ long bitmap_start;
+ long bitmap_end;
int error;
};
@@ -80,28 +82,31 @@ extern int create_cow_file(char *cow_file, char *backing_file,
unsigned long *bitmap_len_out,
int *data_offset_out);
extern int read_cow_bitmap(int fd, void *buf, int offset, int len);
-extern void do_io(struct io_thread_req *req);
+extern void do_io(struct io_thread_req *req, struct request *r,
+ unsigned long *bitmap);
-static inline int ubd_test_bit(__u64 bit, unsigned char *data)
+static inline int ubd_test_bit(__u64 bit, void *data)
{
+ unsigned char *buffer = data;
__u64 n;
int bits, off;
- bits = sizeof(data[0]) * 8;
+ bits = sizeof(buffer[0]) * 8;
n = bit / bits;
off = bit % bits;
- return((data[n] & (1 << off)) != 0);
+ return((buffer[n] & (1 << off)) != 0);
}
-static inline void ubd_set_bit(__u64 bit, unsigned char *data)
+static inline void ubd_set_bit(__u64 bit, void *data)
{
+ unsigned char *buffer = data;
__u64 n;
int bits, off;
- bits = sizeof(data[0]) * 8;
+ bits = sizeof(buffer[0]) * 8;
n = bit / bits;
off = bit % bits;
- data[n] |= (1 << off);
+ buffer[n] |= (1 << off);
}
/*End stuff from ubd_user.h*/
@@ -110,8 +115,6 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data)
static DEFINE_SPINLOCK(ubd_io_lock);
static DEFINE_SPINLOCK(ubd_lock);
-static void (*do_ubd)(void);
-
static int ubd_open(struct inode * inode, struct file * filp);
static int ubd_release(struct inode * inode, struct file * file);
static int ubd_ioctl(struct inode * inode, struct file * file,
@@ -158,6 +161,8 @@ struct cow {
int data_offset;
};
+#define MAX_SG 64
+
struct ubd {
char *file;
int count;
@@ -168,6 +173,7 @@ struct ubd {
int no_cow;
struct cow cow;
struct platform_device pdev;
+ struct scatterlist sg[MAX_SG];
};
#define DEFAULT_COW { \
@@ -460,80 +466,113 @@ __uml_help(fakehd,
);
static void do_ubd_request(request_queue_t * q);
-
-/* Only changed by ubd_init, which is an initcall. */
-int thread_fd = -1;
+static int in_ubd;
/* Changed by ubd_handler, which is serialized because interrupts only
* happen on CPU 0.
*/
int intr_count = 0;
-/* call ubd_finish if you need to serialize */
-static void __ubd_finish(struct request *req, int error)
+static void ubd_end_request(struct request *req, int bytes, int uptodate)
{
- int nsect;
-
- if(error){
- end_request(req, 0);
- return;
+ if (!end_that_request_first(req, uptodate, bytes >> 9)) {
+ add_disk_randomness(req->rq_disk);
+ end_that_request_last(req);
}
- nsect = req->current_nr_sectors;
- req->sector += nsect;
- req->buffer += nsect << 9;
- req->errors = 0;
- req->nr_sectors -= nsect;
- req->current_nr_sectors = 0;
- end_request(req, 1);
}
-static inline void ubd_finish(struct request *req, int error)
+/* call ubd_finish if you need to serialize */
+static void __ubd_finish(struct request *req, int bytes)
{
- spin_lock(&ubd_io_lock);
- __ubd_finish(req, error);
- spin_unlock(&ubd_io_lock);
+ if(bytes < 0){
+ ubd_end_request(req, 0, 0);
+ return;
+ }
+
+ ubd_end_request(req, bytes, 1);
}
-/* Called without ubd_io_lock held */
-static void ubd_handler(void)
+static inline void ubd_finish(struct request *req, int bytes)
{
- struct io_thread_req req;
- struct request *rq = elv_next_request(ubd_queue);
- int n;
-
- do_ubd = NULL;
- intr_count++;
- n = os_read_file(thread_fd, &req, sizeof(req));
- if(n != sizeof(req)){
- printk(KERN_ERR "Pid %d - spurious interrupt in ubd_handler, "
- "err = %d\n", os_getpid(), -n);
- spin_lock(&ubd_io_lock);
- end_request(rq, 0);
- spin_unlock(&ubd_io_lock);
- return;
- }
-
- ubd_finish(rq, req.error);
- reactivate_fd(thread_fd, UBD_IRQ);
- do_ubd_request(ubd_queue);
+ spin_lock(&ubd_io_lock);
+ __ubd_finish(req, bytes);
+ spin_unlock(&ubd_io_lock);
}
+struct bitmap_io {
+ atomic_t count;
+ struct aio_context aio;
+};
+
+struct ubd_aio {
+ struct aio_context aio;
+ struct request *req;
+ int len;
+ struct bitmap_io *bitmap;
+ void *bitmap_buf;
+};
+
+static int ubd_reply_fd = -1;
+
static irqreturn_t ubd_intr(int irq, void *dev, struct pt_regs *unused)
{
- ubd_handler();
- return(IRQ_HANDLED);
-}
+ struct aio_thread_reply reply;
+ struct ubd_aio *aio;
+ struct request *req;
+ int err, n, fd = (int) (long) dev;
+
+ while(1){
+ err = os_read_file(fd, &reply, sizeof(reply));
+ if(err == -EAGAIN)
+ break;
+ if(err < 0){
+ printk("ubd_aio_handler - read returned err %d\n",
+ -err);
+ break;
+ }
-/* Only changed by ubd_init, which is an initcall. */
-static int io_pid = -1;
+ aio = container_of(reply.data, struct ubd_aio, aio);
+ n = reply.err;
-void kill_io_thread(void)
-{
- if(io_pid != -1)
- os_kill_process(io_pid, 1);
-}
+ if(n == 0){
+ req = aio->req;
+ req->nr_sectors -= aio->len >> 9;
+
+ if((aio->bitmap != NULL) &&
+ (atomic_dec_and_test(&aio->bitmap->count))){
+ aio->aio = aio->bitmap->aio;
+ aio->len = 0;
+ kfree(aio->bitmap);
+ aio->bitmap = NULL;
+ submit_aio(&aio->aio);
+ }
+ else {
+ if((req->nr_sectors == 0) &&
+ (aio->bitmap == NULL)){
+ int len = req->hard_nr_sectors << 9;
+ ubd_finish(req, len);
+ }
+
+ if(aio->bitmap_buf != NULL)
+ kfree(aio->bitmap_buf);
+ kfree(aio);
+ }
+ }
+ else if(n < 0){
+ ubd_finish(aio->req, n);
+ if(aio->bitmap != NULL)
+ kfree(aio->bitmap);
+ if(aio->bitmap_buf != NULL)
+ kfree(aio->bitmap_buf);
+ kfree(aio);
+ }
+ }
+ reactivate_fd(fd, UBD_IRQ);
-__uml_exitcall(kill_io_thread);
+ do_ubd_request(ubd_queue);
+
+ return(IRQ_HANDLED);
+}
static int ubd_file_size(struct ubd *dev, __u64 *size_out)
{
@@ -569,7 +608,7 @@ static int ubd_open_dev(struct ubd *dev)
&dev->cow.data_offset, create_ptr);
if((dev->fd == -ENOENT) && create_cow){
- dev->fd = create_cow_file(dev->file, dev->cow.file,
+ dev->fd = create_cow_file(dev->file, dev->cow.file,
dev->openflags, 1 << 9, PAGE_SIZE,
&dev->cow.bitmap_offset,
&dev->cow.bitmap_len,
@@ -668,21 +707,22 @@ static int ubd_add(int n)
struct ubd *dev = &ubd_dev[n];
int err;
+ err = -ENODEV;
if(dev->file == NULL)
- return(-ENODEV);
+ goto out;
if (ubd_open_dev(dev))
- return(-ENODEV);
+ goto out;
err = ubd_file_size(dev, &dev->size);
if(err < 0)
- return(err);
+ goto out_close;
dev->size = ROUND_BLOCK(dev->size);
err = ubd_new_disk(MAJOR_NR, dev->size, n, &ubd_gendisk[n]);
if(err)
- return(err);
+ goto out_close;
if(fake_major != MAJOR_NR)
ubd_new_disk(fake_major, dev->size, n,
@@ -693,8 +733,11 @@ static int ubd_add(int n)
if (fake_ide)
make_ide_entries(ubd_gendisk[n]->disk_name);
+ err = 0;
+out_close:
ubd_close(dev);
- return 0;
+out:
+ return err;
}
static int ubd_config(char *str)
@@ -827,6 +870,10 @@ int ubd_init(void)
{
int i;
+ ubd_reply_fd = init_aio_irq(UBD_IRQ, "ubd", ubd_intr);
+ if(ubd_reply_fd < 0)
+ printk("Setting up ubd AIO failed, err = %d\n", ubd_reply_fd);
+
devfs_mk_dir("ubd");
if (register_blkdev(MAJOR_NR, "ubd"))
return -1;
@@ -837,6 +884,7 @@ int ubd_init(void)
return -1;
}
+ blk_queue_max_hw_segments(ubd_queue, MAX_SG);
if (fake_major != MAJOR_NR) {
char name[sizeof("ubd_nnn\0")];
@@ -848,40 +896,12 @@ int ubd_init(void)
driver_register(&ubd_driver);
for (i = 0; i < MAX_DEV; i++)
ubd_add(i);
+
return 0;
}
late_initcall(ubd_init);
-int ubd_driver_init(void){
- unsigned long stack;
- int err;
-
- /* Set by CONFIG_BLK_DEV_UBD_SYNC or ubd=sync.*/
- if(global_openflags.s){
- printk(KERN_INFO "ubd: Synchronous mode\n");
- /* Letting ubd=sync be like using ubd#s= instead of ubd#= is
- * enough. So use anyway the io thread. */
- }
- stack = alloc_stack(0, 0);
- io_pid = start_io_thread(stack + PAGE_SIZE - sizeof(void *),
- &thread_fd);
- if(io_pid < 0){
- printk(KERN_ERR
- "ubd : Failed to start I/O thread (errno = %d) - "
- "falling back to synchronous I/O\n", -io_pid);
- io_pid = -1;
- return(0);
- }
- err = um_request_irq(UBD_IRQ, thread_fd, IRQ_READ, ubd_intr,
- SA_INTERRUPT, "ubd", ubd_dev);
- if(err != 0)
- printk(KERN_ERR "um_request_irq failed - errno = %d\n", -err);
- return(err);
-}
-
-device_initcall(ubd_driver_init);
-
static int ubd_open(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
@@ -919,105 +939,55 @@ static int ubd_release(struct inode * inode, struct file * file)
return(0);
}
-static void cowify_bitmap(__u64 io_offset, int length, unsigned long *cow_mask,
- __u64 *cow_offset, unsigned long *bitmap,
- __u64 bitmap_offset, unsigned long *bitmap_words,
- __u64 bitmap_len)
+static void cowify_bitmap(struct io_thread_req *req, unsigned long *bitmap)
{
- __u64 sector = io_offset >> 9;
- int i, update_bitmap = 0;
-
- for(i = 0; i < length >> 9; i++){
- if(cow_mask != NULL)
- ubd_set_bit(i, (unsigned char *) cow_mask);
- if(ubd_test_bit(sector + i, (unsigned char *) bitmap))
- continue;
-
- update_bitmap = 1;
- ubd_set_bit(sector + i, (unsigned char *) bitmap);
- }
-
- if(!update_bitmap)
- return;
-
- *cow_offset = sector / (sizeof(unsigned long) * 8);
-
- /* This takes care of the case where we're exactly at the end of the
- * device, and *cow_offset + 1 is off the end. So, just back it up
- * by one word. Thanks to Lynn Kerby for the fix and James McMechan
- * for the original diagnosis.
- */
- if(*cow_offset == ((bitmap_len + sizeof(unsigned long) - 1) /
- sizeof(unsigned long) - 1))
- (*cow_offset)--;
-
- bitmap_words[0] = bitmap[*cow_offset];
- bitmap_words[1] = bitmap[*cow_offset + 1];
-
- *cow_offset *= sizeof(unsigned long);
- *cow_offset += bitmap_offset;
-}
+ __u64 sector = req->offset / req->sectorsize;
+ int i;
-static void cowify_req(struct io_thread_req *req, unsigned long *bitmap,
- __u64 bitmap_offset, __u64 bitmap_len)
-{
- __u64 sector = req->offset >> 9;
- int i;
+ for(i = 0; i < req->length / req->sectorsize; i++){
+ if(ubd_test_bit(sector + i, bitmap))
+ continue;
- if(req->length > (sizeof(req->sector_mask) * 8) << 9)
- panic("Operation too long");
+ if(req->bitmap_start == -1)
+ req->bitmap_start = sector + i;
+ req->bitmap_end = sector + i + 1;
- if(req->op == UBD_READ) {
- for(i = 0; i < req->length >> 9; i++){
- if(ubd_test_bit(sector + i, (unsigned char *) bitmap))
- ubd_set_bit(i, (unsigned char *)
- &req->sector_mask);
- }
- }
- else cowify_bitmap(req->offset, req->length, &req->sector_mask,
- &req->cow_offset, bitmap, bitmap_offset,
- req->bitmap_words, bitmap_len);
+ ubd_set_bit(sector + i, bitmap);
+ }
}
/* Called with ubd_io_lock held */
-static int prepare_request(struct request *req, struct io_thread_req *io_req)
+static int prepare_request(struct request *req, struct io_thread_req *io_req,
+ unsigned long long offset, int page_offset,
+ int len, struct page *page)
{
struct gendisk *disk = req->rq_disk;
struct ubd *dev = disk->private_data;
- __u64 offset;
- int len;
-
- if(req->rq_status == RQ_INACTIVE) return(1);
/* This should be impossible now */
if((rq_data_dir(req) == WRITE) && !dev->openflags.w){
printk("Write attempted on readonly ubd device %s\n",
disk->disk_name);
- end_request(req, 0);
+ ubd_end_request(req, 0, 0);
return(1);
}
- offset = ((__u64) req->sector) << 9;
- len = req->current_nr_sectors << 9;
-
io_req->fds[0] = (dev->cow.file != NULL) ? dev->cow.fd : dev->fd;
io_req->fds[1] = dev->fd;
- io_req->cow_offset = -1;
io_req->offset = offset;
io_req->length = len;
io_req->error = 0;
- io_req->sector_mask = 0;
-
- io_req->op = (rq_data_dir(req) == READ) ? UBD_READ : UBD_WRITE;
+ io_req->op = (rq_data_dir(req) == READ) ? AIO_READ : AIO_WRITE;
io_req->offsets[0] = 0;
io_req->offsets[1] = dev->cow.data_offset;
- io_req->buffer = req->buffer;
+ io_req->buffer = page_address(page) + page_offset;
io_req->sectorsize = 1 << 9;
+ io_req->bitmap_offset = dev->cow.bitmap_offset;
+ io_req->bitmap_start = -1;
+ io_req->bitmap_end = -1;
- if(dev->cow.file != NULL)
- cowify_req(io_req, dev->cow.bitmap, dev->cow.bitmap_offset,
- dev->cow.bitmap_len);
-
+ if((dev->cow.file != NULL) && (io_req->op == UBD_WRITE))
+ cowify_bitmap(io_req, dev->cow.bitmap);
return(0);
}
@@ -1026,30 +996,36 @@ static void do_ubd_request(request_queue_t *q)
{
struct io_thread_req io_req;
struct request *req;
- int err, n;
-
- if(thread_fd == -1){
- while((req = elv_next_request(q)) != NULL){
- err = prepare_request(req, &io_req);
- if(!err){
- do_io(&io_req);
- __ubd_finish(req, io_req.error);
- }
- }
- }
- else {
- if(do_ubd || (req = elv_next_request(q)) == NULL)
- return;
- err = prepare_request(req, &io_req);
- if(!err){
- do_ubd = ubd_handler;
- n = os_write_file(thread_fd, (char *) &io_req,
- sizeof(io_req));
- if(n != sizeof(io_req))
- printk("write to io thread failed, "
- "errno = %d\n", -n);
+ __u64 sector;
+ int err;
+
+ if(in_ubd)
+ return;
+ in_ubd = 1;
+ while((req = elv_next_request(q)) != NULL){
+ struct gendisk *disk = req->rq_disk;
+ struct ubd *dev = disk->private_data;
+ int n, i;
+
+ blkdev_dequeue_request(req);
+
+ sector = req->sector;
+ n = blk_rq_map_sg(q, req, dev->sg);
+
+ for(i = 0; i < n; i++){
+ struct scatterlist *sg = &dev->sg[i];
+
+ err = prepare_request(req, &io_req, sector << 9,
+ sg->offset, sg->length,
+ sg->page);
+ if(err)
+ continue;
+
+ sector += sg->length >> 9;
+ do_io(&io_req, req, dev->cow.bitmap);
}
}
+ in_ubd = 0;
}
static int ubd_ioctl(struct inode * inode, struct file * file,
@@ -1265,131 +1241,95 @@ int create_cow_file(char *cow_file, char *backing_file, struct openflags flags,
return(err);
}
-static int update_bitmap(struct io_thread_req *req)
-{
- int n;
-
- if(req->cow_offset == -1)
- return(0);
-
- n = os_seek_file(req->fds[1], req->cow_offset);
- if(n < 0){
- printk("do_io - bitmap lseek failed : err = %d\n", -n);
- return(1);
- }
-
- n = os_write_file(req->fds[1], &req->bitmap_words,
- sizeof(req->bitmap_words));
- if(n != sizeof(req->bitmap_words)){
- printk("do_io - bitmap update failed, err = %d fd = %d\n", -n,
- req->fds[1]);
- return(1);
- }
-
- return(0);
-}
-
-void do_io(struct io_thread_req *req)
+void do_io(struct io_thread_req *req, struct request *r, unsigned long *bitmap)
{
- char *buf;
- unsigned long len;
- int n, nsectors, start, end, bit;
- int err;
- __u64 off;
-
- nsectors = req->length / req->sectorsize;
- start = 0;
- do {
- bit = ubd_test_bit(start, (unsigned char *) &req->sector_mask);
- end = start;
- while((end < nsectors) &&
- (ubd_test_bit(end, (unsigned char *)
- &req->sector_mask) == bit))
- end++;
-
- off = req->offset + req->offsets[bit] +
- start * req->sectorsize;
- len = (end - start) * req->sectorsize;
- buf = &req->buffer[start * req->sectorsize];
-
- err = os_seek_file(req->fds[bit], off);
- if(err < 0){
- printk("do_io - lseek failed : err = %d\n", -err);
- req->error = 1;
- return;
- }
- if(req->op == UBD_READ){
- n = 0;
- do {
- buf = &buf[n];
- len -= n;
- n = os_read_file(req->fds[bit], buf, len);
- if (n < 0) {
- printk("do_io - read failed, err = %d "
- "fd = %d\n", -n, req->fds[bit]);
- req->error = 1;
- return;
- }
- } while((n < len) && (n != 0));
- if (n < len) memset(&buf[n], 0, len - n);
- } else {
- n = os_write_file(req->fds[bit], buf, len);
- if(n != len){
- printk("do_io - write failed err = %d "
- "fd = %d\n", -n, req->fds[bit]);
- req->error = 1;
- return;
- }
- }
+ struct ubd_aio *aio;
+ struct bitmap_io *bitmap_io = NULL;
+ char *buf;
+ void *bitmap_buf = NULL;
+ unsigned long len, sector;
+ int nsectors, start, end, bit, err;
+ __u64 off;
+
+ if(req->bitmap_start != -1){
+ /* Round up to the nearest word */
+ int round = sizeof(unsigned long);
+ len = (req->bitmap_end - req->bitmap_start +
+ round * 8 - 1) / (round * 8);
+ len *= round;
+
+ off = req->bitmap_start / (8 * round);
+ off *= round;
+
+ bitmap_io = kmalloc(sizeof(*bitmap_io), GFP_KERNEL);
+ if(bitmap_io == NULL){
+ printk("Failed to kmalloc bitmap IO\n");
+ req->error = 1;
+ return;
+ }
- start = end;
- } while(start < nsectors);
+ bitmap_buf = kmalloc(len, GFP_KERNEL);
+ if(bitmap_buf == NULL){
+ printk("do_io : kmalloc of bitmap chunk "
+ "failed\n");
+ kfree(bitmap_io);
+ req->error = 1;
+ return;
+ }
+ memcpy(bitmap_buf, &bitmap[off / sizeof(bitmap[0])], len);
+
+ *bitmap_io = ((struct bitmap_io)
+ { .count = ATOMIC_INIT(0),
+ .aio = INIT_AIO(AIO_WRITE, req->fds[1],
+ bitmap_buf, len,
+ req->bitmap_offset + off,
+ ubd_reply_fd) } );
+ }
- req->error = update_bitmap(req);
-}
+ nsectors = req->length / req->sectorsize;
+ start = 0;
+ end = nsectors;
+ bit = 0;
+ do {
+ if(bitmap != NULL){
+ sector = req->offset / req->sectorsize;
+ bit = ubd_test_bit(sector + start, bitmap);
+ end = start;
+ while((end < nsectors) &&
+ (ubd_test_bit(sector + end, bitmap) == bit))
+ end++;
+ }
-/* Changed in start_io_thread, which is serialized by being called only
- * from ubd_init, which is an initcall.
- */
-int kernel_fd = -1;
+ off = req->offsets[bit] + req->offset +
+ start * req->sectorsize;
+ len = (end - start) * req->sectorsize;
+ buf = &req->buffer[start * req->sectorsize];
-/* Only changed by the io thread */
-int io_count = 0;
+ aio = kmalloc(sizeof(*aio), GFP_KERNEL);
+ if(aio == NULL){
+ req->error = 1;
+ return;
+ }
-int io_thread(void *arg)
-{
- struct io_thread_req req;
- int n;
+ *aio = ((struct ubd_aio)
+ { .aio = INIT_AIO(req->op, req->fds[bit], buf,
+ len, off, ubd_reply_fd),
+ .len = len,
+ .req = r,
+ .bitmap = bitmap_io,
+ .bitmap_buf = bitmap_buf });
+
+ if(aio->bitmap != NULL)
+ atomic_inc(&aio->bitmap->count);
+
+ err = submit_aio(&aio->aio);
+ if(err){
+ printk("do_io - submit_aio failed, "
+ "err = %d\n", err);
+ req->error = 1;
+ return;
+ }
- ignore_sigwinch_sig();
- while(1){
- n = os_read_file(kernel_fd, &req, sizeof(req));
- if(n != sizeof(req)){
- if(n < 0)
- printk("io_thread - read failed, fd = %d, "
- "err = %d\n", kernel_fd, -n);
- else {
- printk("io_thread - short read, fd = %d, "
- "length = %d\n", kernel_fd, n);
- }
- continue;
- }
- io_count++;
- do_io(&req);
- n = os_write_file(kernel_fd, &req, sizeof(req));
- if(n != sizeof(req))
- printk("io_thread - write failed, fd = %d, err = %d\n",
- kernel_fd, -n);
- }
+ start = end;
+ } while(start < nsectors);
}
-
-/*
- * 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/include/aio.h b/arch/um/include/aio.h
new file mode 100644
index 00000000000..83f16877ab0
--- /dev/null
+++ b/arch/um/include/aio.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2004 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef AIO_H__
+#define AIO_H__
+
+enum aio_type { AIO_READ, AIO_WRITE, AIO_MMAP };
+
+struct aio_thread_reply {
+ void *data;
+ int err;
+};
+
+struct aio_context {
+ enum aio_type type;
+ int fd;
+ void *data;
+ int len;
+ unsigned long long offset;
+ int reply_fd;
+ struct aio_context *next;
+};
+
+#define INIT_AIO(aio_type, aio_fd, aio_data, aio_len, aio_offset, \
+ aio_reply_fd) \
+ { .type = aio_type, \
+ .fd = aio_fd, \
+ .data = aio_data, \
+ .len = aio_len, \
+ .offset = aio_offset, \
+ .reply_fd = aio_reply_fd }
+
+#define INIT_AIO_CONTEXT { .reply_fd = -1, \
+ .next = NULL }
+
+extern int submit_aio(struct aio_context *aio);
+
+#endif
diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h
index d705daa2d85..0aa620970ad 100644
--- a/arch/um/include/common-offsets.h
+++ b/arch/um/include/common-offsets.h
@@ -12,3 +12,4 @@ DEFINE_STR(UM_KERN_WARNING, KERN_WARNING);
DEFINE_STR(UM_KERN_NOTICE, KERN_NOTICE);
DEFINE_STR(UM_KERN_INFO, KERN_INFO);
DEFINE_STR(UM_KERN_DEBUG, KERN_DEBUG);
+DEFINE(HOST_ELF_CLASS, ELF_CLASS);
diff --git a/arch/um/include/init.h b/arch/um/include/init.h
index 55c2693f877..cbd79a8d213 100644
--- a/arch/um/include/init.h
+++ b/arch/um/include/init.h
@@ -111,7 +111,15 @@ extern struct uml_param __uml_setup_start, __uml_setup_end;
#ifndef __KERNEL__
-#define __initcall(fn) static initcall_t __initcall_##fn __init_call = fn
+#define __define_initcall(level,fn) \
+ static initcall_t __initcall_##fn __attribute_used__ \
+ __attribute__((__section__(".initcall" level ".init"))) = fn
+
+/* Userspace initcalls shouldn't depend on anything in the kernel, so we'll
+ * make them run first.
+ */
+#define __initcall(fn) __define_initcall("1", fn)
+
#define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
diff --git a/arch/um/include/irq_kern.h b/arch/um/include/irq_kern.h
index 3af52a634c4..c222d56b149 100644
--- a/arch/um/include/irq_kern.h
+++ b/arch/um/include/irq_kern.h
@@ -7,12 +7,15 @@
#define __IRQ_KERN_H__
#include "linux/interrupt.h"
+#include "asm/ptrace.h"
extern int um_request_irq(unsigned int irq, int fd, int type,
irqreturn_t (*handler)(int, void *,
struct pt_regs *),
unsigned long irqflags, const char * devname,
void *dev_id);
+extern int init_aio_irq(int irq, char *name,
+ irqreturn_t (*handler)(int, void *, struct pt_regs *));
#endif
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 881d2988d2d..4c362458052 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -153,6 +153,11 @@ extern int os_file_type(char *file);
extern int os_file_mode(char *file, struct openflags *mode_out);
extern int os_lock_file(int fd, int excl);
+/* start_up.c */
+extern void os_early_checks(void);
+extern int can_do_skas(void);
+
+/* process.c */
extern unsigned long os_process_pc(int pid);
extern int os_process_parent(int pid);
extern void os_stop_process(int pid);
@@ -161,6 +166,9 @@ extern void os_kill_ptraced_process(int pid, int reap_child);
extern void os_usr1_process(int pid);
extern int os_getpid(void);
extern int os_getpgrp(void);
+extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
+extern void init_new_thread_signals(int altstack);
+extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
extern int os_map_memory(void *virt, int fd, unsigned long long off,
unsigned long len, int r, int w, int x);
@@ -170,6 +178,13 @@ extern int os_unmap_memory(void *addr, int len);
extern void os_flush_stdout(void);
extern unsigned long long os_usecs(void);
+/* tt.c
+ * for tt mode only (will be deleted in future...)
+ */
+extern void forward_pending_sigio(int target);
+extern int start_fork_tramp(void *arg, unsigned long temp_stack,
+ int clone_flags, int (*tramp)(void *));
+
#endif
/*
diff --git a/arch/um/include/syscall.h b/arch/um/include/syscall.h
new file mode 100644
index 00000000000..dda1df901a0
--- /dev/null
+++ b/arch/um/include/syscall.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SYSCALL_USER_H
+#define __SYSCALL_USER_H
+
+extern int record_syscall_start(int syscall);
+extern void record_syscall_end(int index, long result);
+
+#endif
diff --git a/arch/um/include/syscall_user.h b/arch/um/include/syscall_user.h
deleted file mode 100644
index 811d0ec2445..00000000000
--- a/arch/um/include/syscall_user.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SYSCALL_USER_H
-#define __SYSCALL_USER_H
-
-extern int record_syscall_start(int syscall);
-extern void record_syscall_end(int index, long result);
-
-#endif
-
-/*
- * 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/include/sysdep-i386/syscalls.h b/arch/um/include/sysdep-i386/syscalls.h
index be0a3e3469e..a0d5b74d373 100644
--- a/arch/um/include/sysdep-i386/syscalls.h
+++ b/arch/um/include/sysdep-i386/syscalls.h
@@ -16,6 +16,8 @@ extern syscall_handler_t sys_rt_sigaction;
extern syscall_handler_t old_mmap_i386;
+extern syscall_handler_t *sys_call_table[];
+
#define EXECUTE_SYSCALL(syscall, regs) \
((long (*)(struct syscall_args)) (*sys_call_table[syscall]))(SYSCALL_ARGS(&regs->regs))
diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h
index be8acd5efd9..331aa2d1f3f 100644
--- a/arch/um/include/sysdep-x86_64/ptrace.h
+++ b/arch/um/include/sysdep-x86_64/ptrace.h
@@ -227,7 +227,7 @@ struct syscall_args {
panic("Bad register in UPT_SET : %d\n", reg); \
break; \
} \
- val; \
+ __upt_val; \
})
#define UPT_SET_SYSCALL_RETURN(r, res) \
diff --git a/arch/um/include/sysdep-x86_64/syscalls.h b/arch/um/include/sysdep-x86_64/syscalls.h
index 67923cca569..e06f83e80f4 100644
--- a/arch/um/include/sysdep-x86_64/syscalls.h
+++ b/arch/um/include/sysdep-x86_64/syscalls.h
@@ -14,6 +14,8 @@ typedef long syscall_handler_t(void);
extern syscall_handler_t *ia32_sys_call_table[];
+extern syscall_handler_t *sys_call_table[];
+
#define EXECUTE_SYSCALL(syscall, regs) \
(((long (*)(long, long, long, long, long, long)) \
(*sys_call_table[syscall]))(UPT_SYSCALL_ARG1(&regs->regs), \
diff --git a/arch/um/include/tlb.h b/arch/um/include/tlb.h
index c6f9628f39b..45d7da6c3b2 100644
--- a/arch/um/include/tlb.h
+++ b/arch/um/include/tlb.h
@@ -9,7 +9,7 @@
#include "um_mmu.h"
struct host_vm_op {
- enum { MMAP, MUNMAP, MPROTECT } type;
+ enum { NONE, MMAP, MUNMAP, MPROTECT } type;
union {
struct {
unsigned long addr;
@@ -38,24 +38,10 @@ extern void mprotect_kernel_vm(int w);
extern void force_flush_all(void);
extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
unsigned long end_addr, int force,
- void (*do_ops)(union mm_context *,
- struct host_vm_op *, int));
+ int (*do_ops)(union mm_context *,
+ struct host_vm_op *, int, int,
+ void **));
extern int flush_tlb_kernel_range_common(unsigned long start,
unsigned long end);
-extern int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
- int r, int w, int x, struct host_vm_op *ops, int index,
- int last_filled, union mm_context *mmu,
- void (*do_ops)(union mm_context *, struct host_vm_op *,
- int));
-extern int add_munmap(unsigned long addr, unsigned long len,
- struct host_vm_op *ops, int index, int last_filled,
- union mm_context *mmu,
- void (*do_ops)(union mm_context *, struct host_vm_op *,
- int));
-extern int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
- int x, struct host_vm_op *ops, int index,
- int last_filled, union mm_context *mmu,
- void (*do_ops)(union mm_context *, struct host_vm_op *,
- int));
#endif
diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h
index 6e348cb6de2..84c0868cd56 100644
--- a/arch/um/include/um_uaccess.h
+++ b/arch/um/include/um_uaccess.h
@@ -20,13 +20,6 @@
#define access_ok(type, addr, size) \
CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)
-/* this function will go away soon - use access_ok() instead */
-static inline int __deprecated verify_area(int type, const void __user *addr, unsigned long size)
-{
- return (CHOOSE_MODE_PROC(verify_area_tt, verify_area_skas, type, addr,
- size));
-}
-
static inline int copy_from_user(void *to, const void __user *from, int n)
{
return(CHOOSE_MODE_PROC(copy_from_user_tt, copy_from_user_skas, to,
diff --git a/arch/um/include/user_util.h b/arch/um/include/user_util.h
index 7b6a24dfd30..bb505e01d99 100644
--- a/arch/um/include/user_util.h
+++ b/arch/um/include/user_util.h
@@ -54,8 +54,6 @@ extern void stack_protections(unsigned long address);
extern void task_protections(unsigned long address);
extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
extern void *add_signal_handler(int sig, void (*handler)(int));
-extern int start_fork_tramp(void *arg, unsigned long temp_stack,
- int clone_flags, int (*tramp)(void *));
extern int linux_main(int argc, char **argv);
extern void set_cmdline(char *cmd);
extern void input_cb(void (*proc)(void *), void *arg, int arg_len);
@@ -64,8 +62,6 @@ extern void *um_kmalloc(int size);
extern int switcheroo(int fd, int prot, void *from, void *to, int size);
extern void setup_machinename(char *machine_out);
extern void setup_hostinfo(void);
-extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
-extern void init_new_thread_signals(int altstack);
extern void do_exec(int old_pid, int new_pid);
extern void tracer_panic(char *msg, ...);
extern char *get_umid(int only_if_set);
@@ -74,16 +70,12 @@ extern int detach(int pid, int sig);
extern int attach(int pid);
extern void kill_child_dead(int pid);
extern int cont(int pid);
-extern void check_ptrace(void);
extern void check_sigio(void);
-extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
extern void write_sigio_workaround(void);
extern void arch_check_bugs(void);
extern int cpu_feature(char *what, char *buf, int len);
extern int arch_handle_signal(int sig, union uml_pt_regs *regs);
extern int arch_fixup(unsigned long address, void *sc_ptr);
-extern void forward_pending_sigio(int target);
-extern int can_do_skas(void);
extern void arch_init_thread(void);
extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
extern int raw(int fd);
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index a8918e80df9..614b8ebeb0e 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -8,25 +8,24 @@ clean-files :=
obj-y = config.o exec_kern.o exitcode.o \
helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
- physmem.o process.o process_kern.o ptrace.o reboot.o resource.o \
- sigio_user.o sigio_kern.o signal_kern.o signal_user.o smp.o \
- syscall_kern.o sysrq.o tempfile.o time.o time_kern.o \
- tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o umid.o \
- user_util.o
+ physmem.o process_kern.o ptrace.o reboot.o resource.o sigio_user.o \
+ sigio_kern.o signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o \
+ tempfile.o time.o time_kern.o tlb.o trap_kern.o trap_user.o \
+ uaccess_user.o um_arch.o umid.o user_util.o
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
obj-$(CONFIG_TTY_LOG) += tty_log.o
-obj-$(CONFIG_SYSCALL_DEBUG) += syscall_user.o
+obj-$(CONFIG_SYSCALL_DEBUG) += syscall.o
obj-$(CONFIG_MODE_TT) += tt/
obj-$(CONFIG_MODE_SKAS) += skas/
user-objs-$(CONFIG_TTY_LOG) += tty_log.o
-USER_OBJS := $(user-objs-y) config.o helper.o main.o process.o tempfile.o \
- time.o tty_log.o umid.o user_util.o
+USER_OBJS := $(user-objs-y) config.o helper.o main.o tempfile.o time.o \
+ tty_log.o umid.o user_util.o
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 9f18061ef4c..dcd81497199 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -31,7 +31,7 @@
#include "kern_util.h"
#include "irq_user.h"
#include "irq_kern.h"
-
+#include "os.h"
/*
* Generic, controller-independent functions:
@@ -168,13 +168,32 @@ void __init init_IRQ(void)
}
}
-/*
- * 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:
- */
+int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
+ struct pt_regs *))
+{
+ int fds[2], err;
+
+ err = os_pipe(fds, 1, 1);
+ if(err){
+ printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
+ goto out;
+ }
+
+ err = um_request_irq(irq, fds[0], IRQ_READ, handler,
+ SA_INTERRUPT | SA_SAMPLE_RANDOM, name,
+ (void *) (long) fds[0]);
+ if(err){
+ printk("init_aio_irq - : um_request_irq failed, err = %d\n",
+ err);
+ goto out_close;
+ }
+
+ err = fds[1];
+ goto out;
+
+ out_close:
+ os_close_file(fds[0]);
+ os_close_file(fds[1]);
+ out:
+ return(err);
+}
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 99439fa15ef..32d3076dd22 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -114,22 +114,3 @@ extern void FASTCALL( __read_lock_failed(rwlock_t *rw));
EXPORT_SYMBOL(__read_lock_failed);
#endif
-
-#ifdef CONFIG_HIGHMEM
-EXPORT_SYMBOL(kmap);
-EXPORT_SYMBOL(kunmap);
-EXPORT_SYMBOL(kmap_atomic);
-EXPORT_SYMBOL(kunmap_atomic);
-EXPORT_SYMBOL(kmap_atomic_to_page);
-#endif
-
-/*
- * 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/main.c b/arch/um/kernel/main.c
index 1e1a87f1c51..d31027f0fe3 100644
--- a/arch/um/kernel/main.c
+++ b/arch/um/kernel/main.c
@@ -97,7 +97,7 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
-#ifdef UML_CONFIG_MODE_TT
+#ifdef UML_CONFIG_CMDLINE_ON_HOST
/* Allocate memory for thread command lines */
if(argc < 2 || strlen(argv[1]) < THREAD_NAME_LEN - 1){
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 5597bd39e6b..64fa062cc11 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -196,7 +196,7 @@ static void init_highmem(void)
static void __init fixaddr_user_init( void)
{
-#if CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
+#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
long size = FIXADDR_USER_END - FIXADDR_USER_START;
pgd_t *pgd;
pud_t *pud;
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index d296d55ade4..db36c7c9594 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -4,7 +4,7 @@
#
obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
- syscall_kern.o syscall_user.o tlb.o trap_user.o uaccess.o \
+ syscall.o tlb.o trap_user.o uaccess.o
subdir- := util
diff --git a/arch/um/kernel/skas/include/mmu-skas.h b/arch/um/kernel/skas/include/mmu-skas.h
index 278b72f1d9a..09536f81ee4 100644
--- a/arch/um/kernel/skas/include/mmu-skas.h
+++ b/arch/um/kernel/skas/include/mmu-skas.h
@@ -6,11 +6,15 @@
#ifndef __SKAS_MMU_H
#define __SKAS_MMU_H
+#include "linux/config.h"
#include "mm_id.h"
struct mmu_context_skas {
struct mm_id id;
unsigned long last_page_table;
+#ifdef CONFIG_3_LEVEL_PGTABLES
+ unsigned long last_pmd;
+#endif
};
extern 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 d983ea84254..060934740f9 100644
--- a/arch/um/kernel/skas/include/skas.h
+++ b/arch/um/kernel/skas/include/skas.h
@@ -24,28 +24,26 @@ extern void new_thread_proc(void *stack, void (*handler)(int sig));
extern void remove_sigstack(void);
extern void new_thread_handler(int sig);
extern void handle_syscall(union uml_pt_regs *regs);
-extern int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len,
- int r, int w, int x, int phys_fd, unsigned long long offset);
-extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len);
+extern int map(struct mm_id * mm_idp, unsigned long virt,
+ unsigned long len, int r, int w, int x, int phys_fd,
+ unsigned long long offset, int done, void **data);
+extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len,
+ int done, void **data);
extern int protect(struct mm_id * mm_idp, unsigned long addr,
- unsigned long len, int r, int w, int x);
+ unsigned long len, int r, int w, int x, int done,
+ void **data);
extern void user_signal(int sig, union uml_pt_regs *regs, int pid);
-extern int new_mm(int from);
+extern int new_mm(int from, unsigned long stack);
extern int start_userspace(unsigned long stub_stack);
extern int copy_context_skas0(unsigned long stack, int pid);
extern void get_skas_faultinfo(int pid, struct faultinfo * fi);
extern long execute_syscall_skas(void *r);
extern unsigned long current_stub_stack(void);
+extern long run_syscall_stub(struct mm_id * mm_idp,
+ int syscall, unsigned long *args, long expected,
+ void **addr, int done);
+extern long syscall_stub_data(struct mm_id * mm_idp,
+ unsigned long *data, int data_count,
+ void **addr, void **stub_addr);
#endif
-
-/*
- * 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/skas/mem_user.c b/arch/um/kernel/skas/mem_user.c
index b0980ff3bd9..1d89640bd50 100644
--- a/arch/um/kernel/skas/mem_user.c
+++ b/arch/um/kernel/skas/mem_user.c
@@ -5,13 +5,14 @@
#include <signal.h>
#include <errno.h>
+#include <string.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <asm/page.h>
#include <asm/unistd.h>
#include "mem_user.h"
#include "mem.h"
-#include "mm_id.h"
+#include "skas.h"
#include "user.h"
#include "os.h"
#include "proc_mm.h"
@@ -23,46 +24,155 @@
#include "uml-config.h"
#include "sysdep/ptrace.h"
#include "sysdep/stub.h"
-#include "skas.h"
-extern unsigned long syscall_stub, __syscall_stub_start;
+extern unsigned long batch_syscall_stub, __syscall_stub_start;
extern void wait_stub_done(int pid, int sig, char * fname);
-static long run_syscall_stub(struct mm_id * mm_idp, int syscall,
- unsigned long *args)
+static inline unsigned long *check_init_stack(struct mm_id * mm_idp,
+ unsigned long *stack)
+{
+ if(stack == NULL){
+ stack = (unsigned long *) mm_idp->stack + 2;
+ *stack = 0;
+ }
+ return stack;
+}
+
+extern int proc_mm;
+
+int single_count = 0;
+int multi_count = 0;
+int multi_op_count = 0;
+
+static long do_syscall_stub(struct mm_id *mm_idp, void **addr)
{
+ unsigned long regs[MAX_REG_NR];
+ unsigned long *data;
+ unsigned long *syscall;
+ long ret, offset;
int n, pid = mm_idp->u.pid;
- unsigned long regs[MAX_REG_NR];
+
+ if(proc_mm)
+#warning Need to look up userspace_pid by cpu
+ pid = userspace_pid[0];
+
+ multi_count++;
get_safe_registers(regs);
regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE +
- ((unsigned long) &syscall_stub -
+ ((unsigned long) &batch_syscall_stub -
(unsigned long) &__syscall_stub_start);
- /* XXX Don't have a define for starting a syscall */
- regs[REGS_SYSCALL_NR] = syscall;
- regs[REGS_SYSCALL_ARG1] = args[0];
- regs[REGS_SYSCALL_ARG2] = args[1];
- regs[REGS_SYSCALL_ARG3] = args[2];
- regs[REGS_SYSCALL_ARG4] = args[3];
- regs[REGS_SYSCALL_ARG5] = args[4];
- regs[REGS_SYSCALL_ARG6] = args[5];
- n = ptrace_setregs(pid, regs);
- if(n < 0){
- printk("run_syscall_stub : PTRACE_SETREGS failed, "
- "errno = %d\n", n);
- return(n);
+ n = ptrace_setregs(pid, regs);
+ if(n < 0)
+ panic("do_syscall_stub : PTRACE_SETREGS failed, errno = %d\n",
+ n);
+
+ wait_stub_done(pid, 0, "do_syscall_stub");
+
+ /* When the stub stops, we find the following values on the
+ * beginning of the stack:
+ * (long )return_value
+ * (long )offset to failed sycall-data (0, if no error)
+ */
+ ret = *((unsigned long *) mm_idp->stack);
+ offset = *((unsigned long *) mm_idp->stack + 1);
+ if (offset) {
+ data = (unsigned long *)(mm_idp->stack +
+ offset - UML_CONFIG_STUB_DATA);
+ syscall = (unsigned long *)((unsigned long)data + data[0]);
+ printk("do_syscall_stub: syscall %ld failed, return value = "
+ "0x%lx, expected return value = 0x%lx\n",
+ syscall[0], ret, syscall[7]);
+ printk(" syscall parameters: "
+ "0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
+ syscall[1], syscall[2], syscall[3],
+ syscall[4], syscall[5], syscall[6]);
+ for(n = 1; n < data[0]/sizeof(long); n++) {
+ if(n == 1)
+ printk(" additional syscall data:");
+ if(n % 4 == 1)
+ printk("\n ");
+ printk(" 0x%lx", data[n]);
+ }
+ if(n > 1)
+ printk("\n");
+ }
+ else ret = 0;
+
+ *addr = check_init_stack(mm_idp, NULL);
+
+ return ret;
+}
+
+long run_syscall_stub(struct mm_id * mm_idp, int syscall,
+ unsigned long *args, long expected, void **addr,
+ int done)
+{
+ unsigned long *stack = check_init_stack(mm_idp, *addr);
+
+ if(done && *addr == NULL)
+ single_count++;
+
+ *stack += sizeof(long);
+ stack += *stack / sizeof(long);
+
+ *stack++ = syscall;
+ *stack++ = args[0];
+ *stack++ = args[1];
+ *stack++ = args[2];
+ *stack++ = args[3];
+ *stack++ = args[4];
+ *stack++ = args[5];
+ *stack++ = expected;
+ *stack = 0;
+ multi_op_count++;
+
+ if(!done && ((((unsigned long) stack) & ~PAGE_MASK) <
+ PAGE_SIZE - 10 * sizeof(long))){
+ *addr = stack;
+ return 0;
}
- wait_stub_done(pid, 0, "run_syscall_stub");
+ return do_syscall_stub(mm_idp, addr);
+}
+
+long syscall_stub_data(struct mm_id * mm_idp,
+ unsigned long *data, int data_count,
+ void **addr, void **stub_addr)
+{
+ unsigned long *stack;
+ int ret = 0;
- return(*((unsigned long *) mm_idp->stack));
+ /* If *addr still is uninitialized, it *must* contain NULL.
+ * Thus in this case do_syscall_stub correctly won't be called.
+ */
+ if((((unsigned long) *addr) & ~PAGE_MASK) >=
+ PAGE_SIZE - (10 + data_count) * sizeof(long)) {
+ ret = do_syscall_stub(mm_idp, addr);
+ /* in case of error, don't overwrite data on stack */
+ if(ret)
+ return ret;
+ }
+
+ stack = check_init_stack(mm_idp, *addr);
+ *addr = stack;
+
+ *stack = data_count * sizeof(long);
+
+ memcpy(stack + 1, data, data_count * sizeof(long));
+
+ *stub_addr = (void *)(((unsigned long)(stack + 1) & ~PAGE_MASK) +
+ UML_CONFIG_STUB_DATA);
+
+ return 0;
}
-int map(struct mm_id *mm_idp, unsigned long virt, unsigned long len,
- int r, int w, int x, int phys_fd, unsigned long long offset)
+int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len,
+ int r, int w, int x, int phys_fd, unsigned long long offset,
+ int done, void **data)
{
- int prot, n;
+ int prot, ret;
prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
(x ? PROT_EXEC : 0);
@@ -70,6 +180,7 @@ int map(struct mm_id *mm_idp, unsigned long virt, unsigned long len,
if(proc_mm){
struct proc_mm_op map;
int fd = mm_idp->u.mm_fd;
+
map = ((struct proc_mm_op) { .op = MM_MMAP,
.u =
{ .mmap =
@@ -81,63 +192,61 @@ int map(struct mm_id *mm_idp, unsigned long virt, unsigned long len,
.fd = phys_fd,
.offset= offset
} } } );
- n = os_write_file(fd, &map, sizeof(map));
- if(n != sizeof(map))
- printk("map : /proc/mm map failed, err = %d\n", -n);
+ ret = os_write_file(fd, &map, sizeof(map));
+ if(ret != sizeof(map))
+ printk("map : /proc/mm map failed, err = %d\n", -ret);
+ else ret = 0;
}
else {
- long res;
unsigned long args[] = { virt, len, prot,
MAP_SHARED | MAP_FIXED, phys_fd,
MMAP_OFFSET(offset) };
- res = run_syscall_stub(mm_idp, STUB_MMAP_NR, args);
- if((void *) res == MAP_FAILED)
- printk("mmap stub failed, errno = %d\n", res);
+ ret = run_syscall_stub(mm_idp, STUB_MMAP_NR, args, virt,
+ data, done);
}
- return 0;
+ return ret;
}
-int unmap(struct mm_id *mm_idp, void *addr, unsigned long len)
+int unmap(struct mm_id * mm_idp, void *addr, unsigned long len, int done,
+ void **data)
{
- int n;
+ int ret;
if(proc_mm){
struct proc_mm_op unmap;
int fd = mm_idp->u.mm_fd;
+
unmap = ((struct proc_mm_op) { .op = MM_MUNMAP,
.u =
{ .munmap =
{ .addr =
(unsigned long) addr,
.len = len } } } );
- n = os_write_file(fd, &unmap, sizeof(unmap));
- if(n != sizeof(unmap)) {
- if(n < 0)
- return(n);
- else if(n > 0)
- return(-EIO);
- }
+ ret = os_write_file(fd, &unmap, sizeof(unmap));
+ if(ret != sizeof(unmap))
+ printk("unmap - proc_mm write returned %d\n", ret);
+ else ret = 0;
}
else {
- int res;
unsigned long args[] = { (unsigned long) addr, len, 0, 0, 0,
0 };
- res = run_syscall_stub(mm_idp, __NR_munmap, args);
- if(res < 0)
- printk("munmap stub failed, errno = %d\n", res);
+ ret = run_syscall_stub(mm_idp, __NR_munmap, args, 0,
+ data, done);
+ if(ret < 0)
+ printk("munmap stub failed, errno = %d\n", ret);
}
- return(0);
+ return ret;
}
-int protect(struct mm_id *mm_idp, unsigned long addr, unsigned long len,
- int r, int w, int x)
+int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
+ int r, int w, int x, int done, void **data)
{
struct proc_mm_op protect;
- int prot, n;
+ int prot, ret;
prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
(x ? PROT_EXEC : 0);
@@ -152,20 +261,19 @@ int protect(struct mm_id *mm_idp, unsigned long addr, unsigned long len,
.len = len,
.prot = prot } } } );
- n = os_write_file(fd, &protect, sizeof(protect));
- if(n != sizeof(protect))
- panic("protect failed, err = %d", -n);
+ ret = os_write_file(fd, &protect, sizeof(protect));
+ if(ret != sizeof(protect))
+ printk("protect failed, err = %d", -ret);
+ else ret = 0;
}
else {
- int res;
unsigned long args[] = { addr, len, prot, 0, 0, 0 };
- res = run_syscall_stub(mm_idp, __NR_mprotect, args);
- if(res < 0)
- panic("mprotect stub failed, errno = %d\n", res);
+ ret = run_syscall_stub(mm_idp, __NR_mprotect, args, 0,
+ data, done);
}
- return(0);
+ return ret;
}
void before_mem_skas(unsigned long unused)
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index d232daa42c3..240143b616a 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -56,6 +56,9 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
*/
mm->context.skas.last_page_table = pmd_page_kernel(*pmd);
+#ifdef CONFIG_3_LEVEL_PGTABLES
+ mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud));
+#endif
*pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
*pte = pte_mkexec(*pte);
@@ -77,23 +80,14 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
struct mm_struct *cur_mm = current->mm;
struct mm_id *cur_mm_id = &cur_mm->context.skas.id;
struct mm_id *mm_id = &mm->context.skas.id;
- unsigned long stack;
- int from, ret;
+ unsigned long stack = 0;
+ int from, ret = -ENOMEM;
- if(proc_mm){
- if((cur_mm != NULL) && (cur_mm != &init_mm))
- from = cur_mm->context.skas.id.u.mm_fd;
- else from = -1;
+ if(!proc_mm || !ptrace_faultinfo){
+ stack = get_zeroed_page(GFP_KERNEL);
+ if(stack == 0)
+ goto out;
- ret = new_mm(from);
- if(ret < 0){
- printk("init_new_context_skas - new_mm failed, "
- "errno = %d\n", ret);
- return ret;
- }
- mm_id->u.mm_fd = ret;
- }
- else {
/* 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.
@@ -103,20 +97,30 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
ret = init_stub_pte(mm, CONFIG_STUB_CODE,
(unsigned long) &__syscall_stub_start);
if(ret)
- goto out;
-
- ret = -ENOMEM;
- stack = get_zeroed_page(GFP_KERNEL);
- if(stack == 0)
- goto out;
- mm_id->stack = stack;
+ goto out_free;
ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack);
if(ret)
goto out_free;
mm->nr_ptes--;
+ }
+ mm_id->stack = stack;
+ if(proc_mm){
+ if((cur_mm != NULL) && (cur_mm != &init_mm))
+ from = cur_mm_id->u.mm_fd;
+ else from = -1;
+
+ ret = new_mm(from, stack);
+ if(ret < 0){
+ printk("init_new_context_skas - new_mm failed, "
+ "errno = %d\n", ret);
+ goto out_free;
+ }
+ mm_id->u.mm_fd = ret;
+ }
+ else {
if((cur_mm != NULL) && (cur_mm != &init_mm))
mm_id->u.pid = copy_context_skas0(stack,
cur_mm_id->u.pid);
@@ -126,7 +130,8 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm)
return 0;
out_free:
- free_page(mm_id->stack);
+ if(mm_id->stack != 0)
+ free_page(mm_id->stack);
out:
return ret;
}
@@ -137,9 +142,15 @@ void destroy_context_skas(struct mm_struct *mm)
if(proc_mm)
os_close_file(mmu->id.u.mm_fd);
- else {
+ else
os_kill_ptraced_process(mmu->id.u.pid, 1);
+
+ if(!proc_mm || !ptrace_faultinfo){
free_page(mmu->id.stack);
- free_page(mmu->last_page_table);
+ pte_free_kernel((pte_t *) mmu->last_page_table);
+ dec_page_state(nr_page_table_pages);
+#ifdef CONFIG_3_LEVEL_PGTABLES
+ pmd_free((pmd_t *) mmu->last_pmd);
+#endif
}
}
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index f228f8b5419..5cd0e992978 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -138,6 +138,8 @@ static void handle_trap(int pid, union uml_pt_regs *regs, int local_using_sysemu
}
extern int __syscall_stub_start;
+int stub_code_fd = -1;
+__u64 stub_code_offset;
static int userspace_tramp(void *stack)
{
@@ -152,31 +154,31 @@ static int userspace_tramp(void *stack)
/* This has a pte, but it can't be mapped in with the usual
* tlb_flush mechanism because this is part of that mechanism
*/
- int fd;
- __u64 offset;
-
- fd = phys_mapping(to_phys(&__syscall_stub_start), &offset);
addr = mmap64((void *) UML_CONFIG_STUB_CODE, page_size(),
- PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset);
+ PROT_EXEC, MAP_FIXED | MAP_PRIVATE,
+ stub_code_fd, stub_code_offset);
if(addr == MAP_FAILED){
- printk("mapping mmap stub failed, errno = %d\n",
+ printk("mapping stub code failed, errno = %d\n",
errno);
exit(1);
}
if(stack != NULL){
+ int fd;
+ __u64 offset;
+
fd = phys_mapping(to_phys(stack), &offset);
addr = mmap((void *) UML_CONFIG_STUB_DATA, page_size(),
PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_SHARED, fd, offset);
if(addr == MAP_FAILED){
- printk("mapping segfault stack failed, "
+ printk("mapping stub stack failed, "
"errno = %d\n", errno);
exit(1);
}
}
}
- if(!ptrace_faultinfo && (stack != NULL)){
+ if(!ptrace_faultinfo){
unsigned long v = UML_CONFIG_STUB_CODE +
(unsigned long) stub_segv_handler -
(unsigned long) &__syscall_stub_start;
@@ -202,6 +204,10 @@ int start_userspace(unsigned long stub_stack)
unsigned long sp;
int pid, status, n, flags;
+ if ( stub_code_fd == -1 )
+ stub_code_fd = phys_mapping(to_phys(&__syscall_stub_start),
+ &stub_code_offset);
+
stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if(stack == MAP_FAILED)
@@ -363,6 +369,53 @@ int copy_context_skas0(unsigned long new_stack, int pid)
return pid;
}
+/*
+ * This is used only, if proc_mm is available, while PTRACE_FAULTINFO
+ * isn't. Opening /proc/mm creates a new mm_context, which lacks the stub-pages
+ * Thus, we map them using /proc/mm-fd
+ */
+void map_stub_pages(int fd, unsigned long code,
+ unsigned long data, unsigned long stack)
+{
+ struct proc_mm_op mmop;
+ int n;
+
+ mmop = ((struct proc_mm_op) { .op = MM_MMAP,
+ .u =
+ { .mmap =
+ { .addr = code,
+ .len = PAGE_SIZE,
+ .prot = PROT_EXEC,
+ .flags = MAP_FIXED | MAP_PRIVATE,
+ .fd = stub_code_fd,
+ .offset = stub_code_offset
+ } } });
+ n = os_write_file(fd, &mmop, sizeof(mmop));
+ if(n != sizeof(mmop))
+ panic("map_stub_pages : /proc/mm map for code failed, "
+ "err = %d\n", -n);
+
+ if ( stack ) {
+ __u64 map_offset;
+ int map_fd = phys_mapping(to_phys((void *)stack), &map_offset);
+ mmop = ((struct proc_mm_op)
+ { .op = MM_MMAP,
+ .u =
+ { .mmap =
+ { .addr = data,
+ .len = PAGE_SIZE,
+ .prot = PROT_READ | PROT_WRITE,
+ .flags = MAP_FIXED | MAP_SHARED,
+ .fd = map_fd,
+ .offset = map_offset
+ } } });
+ n = os_write_file(fd, &mmop, sizeof(mmop));
+ if(n != sizeof(mmop))
+ panic("map_stub_pages : /proc/mm map for data failed, "
+ "err = %d\n", -n);
+ }
+}
+
void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr,
void (*handler)(int))
{
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index cbabab104ac..3d1b227226e 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -129,7 +129,9 @@ int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp,
return(0);
}
-int new_mm(int from)
+extern void map_stub_pages(int fd, unsigned long code,
+ unsigned long data, unsigned long stack);
+int new_mm(int from, unsigned long stack)
{
struct proc_mm_op copy;
int n, fd;
@@ -148,6 +150,9 @@ int new_mm(int from)
"err = %d\n", -n);
}
+ if(!ptrace_faultinfo)
+ map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
+
return(fd);
}
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
new file mode 100644
index 00000000000..51fb94076fc
--- /dev/null
+++ b/arch/um/kernel/skas/syscall.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/sys.h"
+#include "linux/ptrace.h"
+#include "asm/errno.h"
+#include "asm/unistd.h"
+#include "asm/ptrace.h"
+#include "asm/current.h"
+#include "sysdep/syscalls.h"
+#include "kern_util.h"
+#include "syscall.h"
+
+void handle_syscall(union uml_pt_regs *r)
+{
+ struct pt_regs *regs = container_of(r, struct pt_regs, regs);
+ long result;
+ int syscall;
+#ifdef UML_CONFIG_SYSCALL_DEBUG
+ int index;
+
+ index = record_syscall_start(UPT_SYSCALL_NR(r));
+#endif
+ 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
+ * children at all, sometimes hanging when bash doesn't see the first
+ * ls exit.
+ * The assembly looks functionally the same to me. This is
+ * gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
+ * in case it's a compiler bug.
+ */
+ syscall = UPT_SYSCALL_NR(r);
+ if((syscall >= NR_syscalls) || (syscall < 0))
+ result = -ENOSYS;
+ else result = EXECUTE_SYSCALL(syscall, regs);
+
+ REGS_SET_SYSCALL_RETURN(r->skas.regs, result);
+
+ syscall_trace(r, 1);
+#ifdef UML_CONFIG_SYSCALL_DEBUG
+ record_syscall_end(index, result);
+#endif
+}
diff --git a/arch/um/kernel/skas/syscall_kern.c b/arch/um/kernel/skas/syscall_kern.c
deleted file mode 100644
index bdf040ce5b8..00000000000
--- a/arch/um/kernel/skas/syscall_kern.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/sys.h"
-#include "linux/ptrace.h"
-#include "asm/errno.h"
-#include "asm/unistd.h"
-#include "asm/ptrace.h"
-#include "asm/current.h"
-#include "sysdep/syscalls.h"
-#include "kern_util.h"
-
-extern syscall_handler_t *sys_call_table[];
-
-long execute_syscall_skas(void *r)
-{
- struct pt_regs *regs = r;
- long res;
- int syscall;
-
- current->thread.nsyscalls++;
- nsyscalls++;
- syscall = UPT_SYSCALL_NR(&regs->regs);
-
- if((syscall >= NR_syscalls) || (syscall < 0))
- res = -ENOSYS;
- else res = EXECUTE_SYSCALL(syscall, regs);
-
- return(res);
-}
-
-/*
- * 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/skas/syscall_user.c b/arch/um/kernel/skas/syscall_user.c
deleted file mode 100644
index 6b066497014..00000000000
--- a/arch/um/kernel/skas/syscall_user.c
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdlib.h>
-#include <signal.h>
-#include "kern_util.h"
-#include "uml-config.h"
-#include "syscall_user.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-#include "skas.h"
-
-void handle_syscall(union uml_pt_regs *regs)
-{
- long result;
-#ifdef UML_CONFIG_SYSCALL_DEBUG
- int index;
-
- index = record_syscall_start(UPT_SYSCALL_NR(regs));
-#endif
-
- syscall_trace(regs, 0);
- result = execute_syscall_skas(regs);
-
- REGS_SET_SYSCALL_RETURN(regs->skas.regs, result);
-
- syscall_trace(regs, 1);
-#ifdef UML_CONFIG_SYSCALL_DEBUG
- record_syscall_end(index, result);
-#endif
-}
-
-/*
- * 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/skas/tlb.c b/arch/um/kernel/skas/tlb.c
index 6230999c672..6e84963dfc2 100644
--- a/arch/um/kernel/skas/tlb.c
+++ b/arch/um/kernel/skas/tlb.c
@@ -18,33 +18,39 @@
#include "os.h"
#include "tlb.h"
-static void do_ops(union mm_context *mmu, struct host_vm_op *ops, int last)
+static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
+ int finished, void **flush)
{
struct host_vm_op *op;
- int i;
+ int i, ret = 0;
- for(i = 0; i <= last; i++){
+ for(i = 0; i <= last && !ret; i++){
op = &ops[i];
switch(op->type){
case MMAP:
- map(&mmu->skas.id, op->u.mmap.addr, op->u.mmap.len,
- op->u.mmap.r, op->u.mmap.w, op->u.mmap.x,
- op->u.mmap.fd, op->u.mmap.offset);
+ ret = map(&mmu->skas.id, op->u.mmap.addr,
+ op->u.mmap.len, op->u.mmap.r, op->u.mmap.w,
+ op->u.mmap.x, op->u.mmap.fd,
+ op->u.mmap.offset, finished, flush);
break;
case MUNMAP:
- unmap(&mmu->skas.id, (void *) op->u.munmap.addr,
- op->u.munmap.len);
+ ret = unmap(&mmu->skas.id,
+ (void *) op->u.munmap.addr,
+ op->u.munmap.len, finished, flush);
break;
case MPROTECT:
- protect(&mmu->skas.id, op->u.mprotect.addr,
- op->u.mprotect.len, op->u.mprotect.r,
- op->u.mprotect.w, op->u.mprotect.x);
+ ret = protect(&mmu->skas.id, op->u.mprotect.addr,
+ op->u.mprotect.len, op->u.mprotect.r,
+ op->u.mprotect.w, op->u.mprotect.x,
+ finished, flush);
break;
default:
printk("Unknown op type %d in do_ops\n", op->type);
break;
}
}
+
+ return ret;
}
extern int proc_mm;
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
new file mode 100644
index 00000000000..1429c131879
--- /dev/null
+++ b/arch/um/kernel/syscall.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "kern_util.h"
+#include "syscall.h"
+#include "os.h"
+
+struct {
+ int syscall;
+ int pid;
+ long result;
+ unsigned long long start;
+ unsigned long long end;
+} syscall_record[1024];
+
+int record_syscall_start(int syscall)
+{
+ int max, index;
+
+ max = sizeof(syscall_record)/sizeof(syscall_record[0]);
+ index = next_syscall_index(max);
+
+ syscall_record[index].syscall = syscall;
+ syscall_record[index].pid = current_pid();
+ syscall_record[index].result = 0xdeadbeef;
+ syscall_record[index].start = os_usecs();
+ return(index);
+}
+
+void record_syscall_end(int index, long result)
+{
+ syscall_record[index].result = result;
+ syscall_record[index].end = os_usecs();
+}
diff --git a/arch/um/kernel/syscall_user.c b/arch/um/kernel/syscall_user.c
deleted file mode 100644
index 01b711e00a8..00000000000
--- a/arch/um/kernel/syscall_user.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdlib.h>
-#include <sys/time.h>
-#include "kern_util.h"
-#include "syscall_user.h"
-
-struct {
- int syscall;
- int pid;
- long result;
- struct timeval start;
- struct timeval end;
-} syscall_record[1024];
-
-int record_syscall_start(int syscall)
-{
- int max, index;
-
- max = sizeof(syscall_record)/sizeof(syscall_record[0]);
- index = next_syscall_index(max);
-
- syscall_record[index].syscall = syscall;
- syscall_record[index].pid = current_pid();
- syscall_record[index].result = 0xdeadbeef;
- gettimeofday(&syscall_record[index].start, NULL);
- return(index);
-}
-
-void record_syscall_end(int index, long result)
-{
- syscall_record[index].result = result;
- gettimeofday(&syscall_record[index].end, NULL);
-}
-
-/*
- * 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/tlb.c b/arch/um/kernel/tlb.c
index 83ec8d4747f..80ed6188e8a 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -15,12 +15,118 @@
#include "mem_user.h"
#include "os.h"
+static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
+ int r, int w, int x, struct host_vm_op *ops, int *index,
+ int last_filled, union mm_context *mmu, void **flush,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
+{
+ __u64 offset;
+ struct host_vm_op *last;
+ int fd, ret = 0;
+
+ fd = phys_mapping(phys, &offset);
+ if(*index != -1){
+ last = &ops[*index];
+ if((last->type == MMAP) &&
+ (last->u.mmap.addr + last->u.mmap.len == virt) &&
+ (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
+ (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
+ (last->u.mmap.offset + last->u.mmap.len == offset)){
+ last->u.mmap.len += len;
+ return 0;
+ }
+ }
+
+ if(*index == last_filled){
+ ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
+ *index = -1;
+ }
+
+ ops[++*index] = ((struct host_vm_op) { .type = MMAP,
+ .u = { .mmap = {
+ .addr = virt,
+ .len = len,
+ .r = r,
+ .w = w,
+ .x = x,
+ .fd = fd,
+ .offset = offset }
+ } });
+ return ret;
+}
+
+static int add_munmap(unsigned long addr, unsigned long len,
+ struct host_vm_op *ops, int *index, int last_filled,
+ union mm_context *mmu, void **flush,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
+{
+ struct host_vm_op *last;
+ int ret = 0;
+
+ if(*index != -1){
+ last = &ops[*index];
+ if((last->type == MUNMAP) &&
+ (last->u.munmap.addr + last->u.mmap.len == addr)){
+ last->u.munmap.len += len;
+ return 0;
+ }
+ }
+
+ if(*index == last_filled){
+ ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
+ *index = -1;
+ }
+
+ ops[++*index] = ((struct host_vm_op) { .type = MUNMAP,
+ .u = { .munmap = {
+ .addr = addr,
+ .len = len } } });
+ return ret;
+}
+
+static int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
+ int x, struct host_vm_op *ops, int *index,
+ int last_filled, union mm_context *mmu, void **flush,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
+{
+ struct host_vm_op *last;
+ int ret = 0;
+
+ if(*index != -1){
+ last = &ops[*index];
+ if((last->type == MPROTECT) &&
+ (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
+ (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
+ (last->u.mprotect.x == x)){
+ last->u.mprotect.len += len;
+ return 0;
+ }
+ }
+
+ if(*index == last_filled){
+ ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
+ *index = -1;
+ }
+
+ ops[++*index] = ((struct host_vm_op) { .type = MPROTECT,
+ .u = { .mprotect = {
+ .addr = addr,
+ .len = len,
+ .r = r,
+ .w = w,
+ .x = x } } });
+ return ret;
+}
+
#define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1))
void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
unsigned long end_addr, int force,
- void (*do_ops)(union mm_context *, struct host_vm_op *,
- int))
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
{
pgd_t *npgd;
pud_t *npud;
@@ -29,21 +135,24 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
union mm_context *mmu = &mm->context;
unsigned long addr, end;
int r, w, x;
- struct host_vm_op ops[16];
+ struct host_vm_op ops[1];
+ void *flush = NULL;
int op_index = -1, last_op = sizeof(ops) / sizeof(ops[0]) - 1;
+ int ret = 0;
if(mm == NULL) return;
- for(addr = start_addr; addr < end_addr;){
+ ops[0].type = NONE;
+ for(addr = start_addr; addr < end_addr && !ret;){
npgd = pgd_offset(mm, addr);
if(!pgd_present(*npgd)){
end = ADD_ROUND(addr, PGDIR_SIZE);
if(end > end_addr)
end = end_addr;
if(force || pgd_newpage(*npgd)){
- op_index = add_munmap(addr, end - addr, ops,
- op_index, last_op, mmu,
- do_ops);
+ ret = add_munmap(addr, end - addr, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
pgd_mkuptodate(*npgd);
}
addr = end;
@@ -56,9 +165,9 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
if(end > end_addr)
end = end_addr;
if(force || pud_newpage(*npud)){
- op_index = add_munmap(addr, end - addr, ops,
- op_index, last_op, mmu,
- do_ops);
+ ret = add_munmap(addr, end - addr, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
pud_mkuptodate(*npud);
}
addr = end;
@@ -71,9 +180,9 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
if(end > end_addr)
end = end_addr;
if(force || pmd_newpage(*npmd)){
- op_index = add_munmap(addr, end - addr, ops,
- op_index, last_op, mmu,
- do_ops);
+ ret = add_munmap(addr, end - addr, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
pmd_mkuptodate(*npmd);
}
addr = end;
@@ -92,24 +201,32 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
}
if(force || pte_newpage(*npte)){
if(pte_present(*npte))
- op_index = add_mmap(addr,
- pte_val(*npte) & PAGE_MASK,
- PAGE_SIZE, r, w, x, ops,
- op_index, last_op, mmu,
- do_ops);
- else op_index = add_munmap(addr, PAGE_SIZE, ops,
- op_index, last_op, mmu,
- do_ops);
+ ret = add_mmap(addr,
+ pte_val(*npte) & PAGE_MASK,
+ PAGE_SIZE, r, w, x, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+ else ret = add_munmap(addr, PAGE_SIZE, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
}
else if(pte_newprot(*npte))
- op_index = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
- op_index, last_op, mmu,
- do_ops);
+ ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
*npte = pte_mkuptodate(*npte);
addr += PAGE_SIZE;
}
- (*do_ops)(mmu, ops, op_index);
+
+ if(!ret)
+ ret = (*do_ops)(mmu, ops, op_index, 1, &flush);
+
+ /* This is not an else because ret is modified above */
+ if(ret) {
+ printk("fix_range_common: failed, killing current process\n");
+ force_sig(SIGKILL, current);
+ }
}
int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
@@ -226,106 +343,6 @@ pte_t *addr_pte(struct task_struct *task, unsigned long addr)
return(pte_offset_map(pmd, addr));
}
-int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
- int r, int w, int x, struct host_vm_op *ops, int index,
- int last_filled, union mm_context *mmu,
- void (*do_ops)(union mm_context *, struct host_vm_op *, int))
-{
- __u64 offset;
- struct host_vm_op *last;
- int fd;
-
- fd = phys_mapping(phys, &offset);
- if(index != -1){
- last = &ops[index];
- if((last->type == MMAP) &&
- (last->u.mmap.addr + last->u.mmap.len == virt) &&
- (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
- (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
- (last->u.mmap.offset + last->u.mmap.len == offset)){
- last->u.mmap.len += len;
- return(index);
- }
- }
-
- if(index == last_filled){
- (*do_ops)(mmu, ops, last_filled);
- index = -1;
- }
-
- ops[++index] = ((struct host_vm_op) { .type = MMAP,
- .u = { .mmap = {
- .addr = virt,
- .len = len,
- .r = r,
- .w = w,
- .x = x,
- .fd = fd,
- .offset = offset }
- } });
- return(index);
-}
-
-int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops,
- int index, int last_filled, union mm_context *mmu,
- void (*do_ops)(union mm_context *, struct host_vm_op *, int))
-{
- struct host_vm_op *last;
-
- if(index != -1){
- last = &ops[index];
- if((last->type == MUNMAP) &&
- (last->u.munmap.addr + last->u.mmap.len == addr)){
- last->u.munmap.len += len;
- return(index);
- }
- }
-
- if(index == last_filled){
- (*do_ops)(mmu, ops, last_filled);
- index = -1;
- }
-
- ops[++index] = ((struct host_vm_op) { .type = MUNMAP,
- .u = { .munmap = {
- .addr = addr,
- .len = len } } });
- return(index);
-}
-
-int add_mprotect(unsigned long addr, unsigned long len, int r, int w, int x,
- struct host_vm_op *ops, int index, int last_filled,
- union mm_context *mmu,
- void (*do_ops)(union mm_context *, struct host_vm_op *, int))
-{
- struct host_vm_op *last;
-
- if(index != -1){
- last = &ops[index];
- if((last->type == MPROTECT) &&
- (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
- (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
- (last->u.mprotect.x == x)){
- last->u.mprotect.len += len;
- return(index);
- }
- }
-
- if(index == last_filled){
- (*do_ops)(mmu, ops, last_filled);
- index = -1;
- }
-
- ops[++index] = ((struct host_vm_op) { .type = MPROTECT,
- .u = { .mprotect = {
- .addr = addr,
- .len = len,
- .r = r,
- .w = w,
- .x = x } } });
- return(index);
-}
-
void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
{
address &= PAGE_MASK;
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c
index c20aef12059..b5fc89fe9ea 100644
--- a/arch/um/kernel/trap_kern.c
+++ b/arch/um/kernel/trap_kern.c
@@ -26,6 +26,7 @@
#include "mem.h"
#include "mem_kern.h"
+/* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */
int handle_page_fault(unsigned long address, unsigned long ip,
int is_write, int is_user, int *code_out)
{
@@ -35,7 +36,6 @@ int handle_page_fault(unsigned long address, unsigned long ip,
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
- unsigned long page;
int err = -EFAULT;
*code_out = SEGV_MAPERR;
@@ -52,7 +52,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
else if(expand_stack(vma, address))
goto out;
- good_area:
+good_area:
*code_out = SEGV_ACCERR;
if(is_write && !(vma->vm_flags & VM_WRITE))
goto out;
@@ -60,9 +60,8 @@ int handle_page_fault(unsigned long address, unsigned long ip,
if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto out;
- page = address & PAGE_MASK;
do {
- survive:
+survive:
switch (handle_mm_fault(mm, vma, address, is_write)){
case VM_FAULT_MINOR:
current->min_flt++;
@@ -79,16 +78,16 @@ int handle_page_fault(unsigned long address, unsigned long ip,
default:
BUG();
}
- pgd = pgd_offset(mm, page);
- pud = pud_offset(pgd, page);
- pmd = pmd_offset(pud, page);
- pte = pte_offset_kernel(pmd, page);
+ pgd = pgd_offset(mm, address);
+ pud = pud_offset(pgd, address);
+ pmd = pmd_offset(pud, address);
+ pte = pte_offset_kernel(pmd, address);
} while(!pte_present(*pte));
err = 0;
*pte = pte_mkyoung(*pte);
if(pte_write(*pte)) *pte = pte_mkdirty(*pte);
- flush_tlb_page(vma, page);
- out:
+ flush_tlb_page(vma, address);
+out:
up_read(&mm->mmap_sem);
return(err);
@@ -144,19 +143,18 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc)
panic("Kernel mode fault at addr 0x%lx, ip 0x%lx",
address, ip);
- if(err == -EACCES){
+ if (err == -EACCES) {
si.si_signo = SIGBUS;
si.si_errno = 0;
si.si_code = BUS_ADRERR;
si.si_addr = (void *)address;
current->thread.arch.faultinfo = fi;
force_sig_info(SIGBUS, &si, current);
- }
- else if(err == -ENOMEM){
+ } else if (err == -ENOMEM) {
printk("VM: killing process %s\n", current->comm);
do_exit(SIGKILL);
- }
- else {
+ } else {
+ BUG_ON(err != -EFAULT);
si.si_signo = SIGSEGV;
si.si_addr = (void *) address;
current->thread.arch.faultinfo = fi;
@@ -200,30 +198,3 @@ void winch(int sig, union uml_pt_regs *regs)
void trap_init(void)
{
}
-
-DEFINE_SPINLOCK(trap_lock);
-
-static int trap_index = 0;
-
-int next_trap_index(int limit)
-{
- int ret;
-
- spin_lock(&trap_lock);
- ret = trap_index;
- if(++trap_index == limit)
- trap_index = 0;
- spin_unlock(&trap_lock);
- return(ret);
-}
-
-/*
- * 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/trap_user.c b/arch/um/kernel/trap_user.c
index f825a6eda3f..e9ccd6b8d3c 100644
--- a/arch/um/kernel/trap_user.c
+++ b/arch/um/kernel/trap_user.c
@@ -40,35 +40,14 @@ void kill_child_dead(int pid)
} while(1);
}
-/* Unlocked - don't care if this is a bit off */
-int nsegfaults = 0;
-
-struct {
- unsigned long address;
- int is_write;
- int pid;
- unsigned long sp;
- int is_user;
-} segfault_record[1024];
-
void segv_handler(int sig, union uml_pt_regs *regs)
{
- int index, max;
struct faultinfo * fi = UPT_FAULTINFO(regs);
if(UPT_IS_USER(regs) && !SEGV_IS_FIXABLE(fi)){
bad_segv(*fi, UPT_IP(regs));
return;
}
- max = sizeof(segfault_record)/sizeof(segfault_record[0]);
- index = next_trap_index(max);
-
- nsegfaults++;
- segfault_record[index].address = FAULT_ADDRESS(*fi);
- segfault_record[index].pid = os_getpid();
- segfault_record[index].is_write = FAULT_WRITE(*fi);
- segfault_record[index].sp = UPT_SP(regs);
- segfault_record[index].is_user = UPT_IS_USER(regs);
segv(*fi, UPT_IP(regs), UPT_IS_USER(regs), regs);
}
diff --git a/arch/um/kernel/tt/syscall_kern.c b/arch/um/kernel/tt/syscall_kern.c
index 2650a628719..3d29c90514c 100644
--- a/arch/um/kernel/tt/syscall_kern.c
+++ b/arch/um/kernel/tt/syscall_kern.c
@@ -12,36 +12,41 @@
#include "asm/uaccess.h"
#include "asm/stat.h"
#include "sysdep/syscalls.h"
+#include "sysdep/sigcontext.h"
#include "kern_util.h"
+#include "syscall.h"
-extern syscall_handler_t *sys_call_table[];
-
-long execute_syscall_tt(void *r)
+void syscall_handler_tt(int sig, struct pt_regs *regs)
{
- struct pt_regs *regs = r;
- long res;
+ void *sc;
+ long result;
int syscall;
-
#ifdef CONFIG_SYSCALL_DEBUG
+ int index;
+ index = record_syscall_start(syscall);
+#endif
+ sc = UPT_SC(&regs->regs);
+ SC_START_SYSCALL(sc);
+
+ syscall_trace(&regs->regs, 0);
+
current->thread.nsyscalls++;
nsyscalls++;
-#endif
syscall = UPT_SYSCALL_NR(&regs->regs);
if((syscall >= NR_syscalls) || (syscall < 0))
- res = -ENOSYS;
- else res = EXECUTE_SYSCALL(syscall, regs);
+ result = -ENOSYS;
+ else result = EXECUTE_SYSCALL(syscall, regs);
- return(res);
-}
+ /* regs->sc may have changed while the system call ran (there may
+ * have been an interrupt or segfault), so it needs to be refreshed.
+ */
+ UPT_SC(&regs->regs) = sc;
-/*
- * 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:
- */
+ SC_SET_SYSCALL_RETURN(sc, result);
+
+ syscall_trace(&regs->regs, 1);
+#ifdef CONFIG_SYSCALL_DEBUG
+ record_syscall_end(index, result);
+#endif
+}
diff --git a/arch/um/kernel/tt/syscall_user.c b/arch/um/kernel/tt/syscall_user.c
index b218316cfdb..902987bf379 100644
--- a/arch/um/kernel/tt/syscall_user.c
+++ b/arch/um/kernel/tt/syscall_user.c
@@ -13,42 +13,9 @@
#include "task.h"
#include "user_util.h"
#include "kern_util.h"
-#include "syscall_user.h"
+#include "syscall.h"
#include "tt.h"
-
-void syscall_handler_tt(int sig, union uml_pt_regs *regs)
-{
- void *sc;
- long result;
- int syscall;
-#ifdef UML_CONFIG_DEBUG_SYSCALL
- int index;
-#endif
-
- syscall = UPT_SYSCALL_NR(regs);
- sc = UPT_SC(regs);
- SC_START_SYSCALL(sc);
-
-#ifdef UML_CONFIG_DEBUG_SYSCALL
- index = record_syscall_start(syscall);
-#endif
- syscall_trace(regs, 0);
- result = execute_syscall_tt(regs);
-
- /* regs->sc may have changed while the system call ran (there may
- * have been an interrupt or segfault), so it needs to be refreshed.
- */
- UPT_SC(regs) = sc;
-
- SC_SET_SYSCALL_RETURN(sc, result);
-
- syscall_trace(regs, 1);
-#ifdef UML_CONFIG_DEBUG_SYSCALL
- record_syscall_end(index, result);
-#endif
-}
-
void do_sigtrap(void *task)
{
UPT_SYSCALL_NR(TASK_REGS(task)) = -1;
diff --git a/arch/um/kernel/tt/tlb.c b/arch/um/kernel/tt/tlb.c
index 2eefb43bc9c..f1d85dbb45b 100644
--- a/arch/um/kernel/tt/tlb.c
+++ b/arch/um/kernel/tt/tlb.c
@@ -17,25 +17,31 @@
#include "os.h"
#include "tlb.h"
-static void do_ops(union mm_context *mmu, struct host_vm_op *ops, int last)
+static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
+ int finished, void **flush)
{
struct host_vm_op *op;
- int i;
+ int i, ret=0;
- for(i = 0; i <= last; i++){
+ for(i = 0; i <= last && !ret; i++){
op = &ops[i];
switch(op->type){
case MMAP:
- os_map_memory((void *) op->u.mmap.addr, op->u.mmap.fd,
- op->u.mmap.offset, op->u.mmap.len,
- op->u.mmap.r, op->u.mmap.w,
- op->u.mmap.x);
+ ret = os_map_memory((void *) op->u.mmap.addr,
+ op->u.mmap.fd, op->u.mmap.offset,
+ op->u.mmap.len, op->u.mmap.r,
+ op->u.mmap.w, op->u.mmap.x);
break;
case MUNMAP:
- os_unmap_memory((void *) op->u.munmap.addr,
- op->u.munmap.len);
+ ret = os_unmap_memory((void *) op->u.munmap.addr,
+ op->u.munmap.len);
break;
case MPROTECT:
+ ret = protect_memory(op->u.mprotect.addr,
+ op->u.munmap.len,
+ op->u.mprotect.r,
+ op->u.mprotect.w,
+ op->u.mprotect.x, 1);
protect_memory(op->u.mprotect.addr, op->u.munmap.len,
op->u.mprotect.r, op->u.mprotect.w,
op->u.mprotect.x, 1);
@@ -45,6 +51,8 @@ static void do_ops(union mm_context *mmu, struct host_vm_op *ops, int last)
break;
}
}
+
+ return ret;
}
static void fix_range(struct mm_struct *mm, unsigned long start_addr,
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index ca2bb6f09a7..09f6f7ce469 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -126,7 +126,7 @@ unsigned long start_vm;
unsigned long end_vm;
int ncpus = 1;
-#ifdef CONFIG_MODE_TT
+#ifdef CONFIG_CMDLINE_ON_HOST
/* Pointer set in linux_main, the array itself is private to each thread,
* and changed at address space creation time so this poses no concurrency
* problems.
@@ -141,7 +141,7 @@ long physmem_size = 32 * 1024 * 1024;
void set_cmdline(char *cmd)
{
-#ifdef CONFIG_MODE_TT
+#ifdef CONFIG_CMDLINE_ON_HOST
char *umid, *ptr;
if(CHOOSE_MODE(honeypot, 0)) return;
@@ -333,6 +333,7 @@ int linux_main(int argc, char **argv)
if(have_root == 0)
add_arg(DEFAULT_COMMAND_LINE);
+ os_early_checks();
mode_tt = force_tt ? 1 : !can_do_skas();
#ifndef CONFIG_MODE_TT
if (mode_tt) {
@@ -385,7 +386,7 @@ int linux_main(int argc, char **argv)
setup_machinename(system_utsname.machine);
-#ifdef CONFIG_MODE_TT
+#ifdef CONFIG_CMDLINE_ON_HOST
argv1_begin = argv[1];
argv1_end = &argv[1][strlen(argv[1])];
#endif
@@ -470,7 +471,6 @@ void __init setup_arch(char **cmdline_p)
void __init check_bugs(void)
{
arch_check_bugs();
- check_ptrace();
check_sigio();
check_devanon();
}
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index 4ddf540284c..7a1662419c0 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -3,11 +3,19 @@
# Licensed under the GPL
#
-obj-y = elf_aux.o file.o process.o signal.o time.o tty.o user_syms.o drivers/ \
- sys-$(SUBARCH)/
+obj-y = aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
+ tty.o user_syms.o drivers/ sys-$(SUBARCH)/
-USER_OBJS := elf_aux.o file.o process.o signal.o time.o tty.o
+USER_OBJS := aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
+ tty.o
+
+elf_aux.o: $(ARCH_DIR)/kernel-offsets.h
+CFLAGS_elf_aux.o += -I$(objtree)/arch/um
CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
+HAVE_AIO_ABI := $(shell [ -r /usr/include/linux/aio_abi.h ] && \
+ echo -DHAVE_AIO_ABI )
+CFLAGS_aio.o += $(HAVE_AIO_ABI)
+
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
new file mode 100644
index 00000000000..b04897cd995
--- /dev/null
+++ b/arch/um/os-Linux/aio.c
@@ -0,0 +1,414 @@
+/*
+ * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <errno.h>
+#include <sched.h>
+#include <sys/syscall.h>
+#include "os.h"
+#include "helper.h"
+#include "aio.h"
+#include "init.h"
+#include "user.h"
+#include "mode.h"
+
+static int aio_req_fd_r = -1;
+static int aio_req_fd_w = -1;
+
+static int update_aio(struct aio_context *aio, int res)
+{
+ if(res < 0)
+ aio->len = res;
+ else if((res == 0) && (aio->type == AIO_READ)){
+ /* This is the EOF case - we have hit the end of the file
+ * and it ends in a partial block, so we fill the end of
+ * the block with zeros and claim success.
+ */
+ memset(aio->data, 0, aio->len);
+ aio->len = 0;
+ }
+ else if(res > 0){
+ aio->len -= res;
+ aio->data += res;
+ aio->offset += res;
+ return aio->len;
+ }
+
+ return 0;
+}
+
+#if defined(HAVE_AIO_ABI)
+#include <linux/aio_abi.h>
+
+/* If we have the headers, we are going to build with AIO enabled.
+ * If we don't have aio in libc, we define the necessary stubs here.
+ */
+
+#if !defined(HAVE_AIO_LIBC)
+
+static long io_setup(int n, aio_context_t *ctxp)
+{
+ return syscall(__NR_io_setup, n, ctxp);
+}
+
+static long io_submit(aio_context_t ctx, long nr, struct iocb **iocbpp)
+{
+ return syscall(__NR_io_submit, ctx, nr, iocbpp);
+}
+
+static long io_getevents(aio_context_t ctx_id, long min_nr, long nr,
+ struct io_event *events, struct timespec *timeout)
+{
+ return syscall(__NR_io_getevents, ctx_id, min_nr, nr, events, timeout);
+}
+
+#endif
+
+/* The AIO_MMAP cases force the mmapped page into memory here
+ * rather than in whatever place first touches the data. I used
+ * to do this by touching the page, but that's delicate because
+ * gcc is prone to optimizing that away. So, what's done here
+ * is we read from the descriptor from which the page was
+ * mapped. The caller is required to pass an offset which is
+ * inside the page that was mapped. Thus, when the read
+ * returns, we know that the page is in the page cache, and
+ * that it now backs the mmapped area.
+ */
+
+static int do_aio(aio_context_t ctx, struct aio_context *aio)
+{
+ struct iocb iocb, *iocbp = &iocb;
+ char c;
+ int err;
+
+ iocb = ((struct iocb) { .aio_data = (unsigned long) aio,
+ .aio_reqprio = 0,
+ .aio_fildes = aio->fd,
+ .aio_buf = (unsigned long) aio->data,
+ .aio_nbytes = aio->len,
+ .aio_offset = aio->offset,
+ .aio_reserved1 = 0,
+ .aio_reserved2 = 0,
+ .aio_reserved3 = 0 });
+
+ switch(aio->type){
+ case AIO_READ:
+ iocb.aio_lio_opcode = IOCB_CMD_PREAD;
+ break;
+ case AIO_WRITE:
+ iocb.aio_lio_opcode = IOCB_CMD_PWRITE;
+ break;
+ case AIO_MMAP:
+ iocb.aio_lio_opcode = IOCB_CMD_PREAD;
+ iocb.aio_buf = (unsigned long) &c;
+ iocb.aio_nbytes = sizeof(c);
+ break;
+ default:
+ printk("Bogus op in do_aio - %d\n", aio->type);
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = io_submit(ctx, 1, &iocbp);
+ if(err > 0)
+ err = 0;
+
+ out:
+ return err;
+}
+
+static aio_context_t ctx = 0;
+
+static int aio_thread(void *arg)
+{
+ struct aio_thread_reply reply;
+ struct aio_context *aio;
+ struct io_event event;
+ int err, n;
+
+ signal(SIGWINCH, SIG_IGN);
+
+ while(1){
+ n = io_getevents(ctx, 1, 1, &event, NULL);
+ if(n < 0){
+ if(errno == EINTR)
+ continue;
+ printk("aio_thread - io_getevents failed, "
+ "errno = %d\n", errno);
+ }
+ else {
+ aio = (struct aio_context *) event.data;
+ if(update_aio(aio, event.res)){
+ do_aio(ctx, aio);
+ continue;
+ }
+
+ reply = ((struct aio_thread_reply)
+ { .data = aio,
+ .err = aio->len });
+ err = os_write_file(aio->reply_fd, &reply,
+ sizeof(reply));
+ if(err != sizeof(reply))
+ printk("aio_thread - write failed, "
+ "fd = %d, err = %d\n", aio->reply_fd,
+ -err);
+ }
+ }
+ return 0;
+}
+
+#endif
+
+static int do_not_aio(struct aio_context *aio)
+{
+ char c;
+ int err;
+
+ switch(aio->type){
+ case AIO_READ:
+ err = os_seek_file(aio->fd, aio->offset);
+ if(err)
+ goto out;
+
+ err = os_read_file(aio->fd, aio->data, aio->len);
+ break;
+ case AIO_WRITE:
+ err = os_seek_file(aio->fd, aio->offset);
+ if(err)
+ goto out;
+
+ err = os_write_file(aio->fd, aio->data, aio->len);
+ break;
+ case AIO_MMAP:
+ err = os_seek_file(aio->fd, aio->offset);
+ if(err)
+ goto out;
+
+ err = os_read_file(aio->fd, &c, sizeof(c));
+ break;
+ default:
+ printk("do_not_aio - bad request type : %d\n", aio->type);
+ err = -EINVAL;
+ break;
+ }
+
+ out:
+ return err;
+}
+
+static int not_aio_thread(void *arg)
+{
+ struct aio_context *aio;
+ struct aio_thread_reply reply;
+ int err;
+
+ signal(SIGWINCH, SIG_IGN);
+ while(1){
+ err = os_read_file(aio_req_fd_r, &aio, sizeof(aio));
+ if(err != sizeof(aio)){
+ if(err < 0)
+ printk("not_aio_thread - read failed, "
+ "fd = %d, err = %d\n", aio_req_fd_r,
+ -err);
+ else {
+ printk("not_aio_thread - short read, fd = %d, "
+ "length = %d\n", aio_req_fd_r, err);
+ }
+ continue;
+ }
+ again:
+ err = do_not_aio(aio);
+
+ if(update_aio(aio, err))
+ goto again;
+
+ reply = ((struct aio_thread_reply) { .data = aio,
+ .err = aio->len });
+ err = os_write_file(aio->reply_fd, &reply, sizeof(reply));
+ if(err != sizeof(reply))
+ printk("not_aio_thread - write failed, fd = %d, "
+ "err = %d\n", aio_req_fd_r, -err);
+ }
+}
+
+static int submit_aio_24(struct aio_context *aio)
+{
+ int err;
+
+ err = os_write_file(aio_req_fd_w, &aio, sizeof(aio));
+ if(err == sizeof(aio))
+ err = 0;
+
+ return err;
+}
+
+static int aio_pid = -1;
+static int (*submit_proc)(struct aio_context *aio);
+
+static int init_aio_24(void)
+{
+ unsigned long stack;
+ int fds[2], err;
+
+ err = os_pipe(fds, 1, 1);
+ if(err)
+ goto out;
+
+ aio_req_fd_w = fds[0];
+ aio_req_fd_r = fds[1];
+ err = run_helper_thread(not_aio_thread, NULL,
+ CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
+ if(err < 0)
+ goto out_close_pipe;
+
+ aio_pid = err;
+ goto out;
+
+ out_close_pipe:
+ os_close_file(fds[0]);
+ os_close_file(fds[1]);
+ aio_req_fd_w = -1;
+ aio_req_fd_r = -1;
+ out:
+#ifndef HAVE_AIO_ABI
+ printk("/usr/include/linux/aio_abi.h not present during build\n");
+#endif
+ printk("2.6 host AIO support not used - falling back to I/O "
+ "thread\n");
+
+ submit_proc = submit_aio_24;
+
+ return 0;
+}
+
+#ifdef HAVE_AIO_ABI
+#define DEFAULT_24_AIO 0
+static int submit_aio_26(struct aio_context *aio)
+{
+ struct aio_thread_reply reply;
+ int err;
+
+ err = do_aio(ctx, aio);
+ if(err){
+ reply = ((struct aio_thread_reply) { .data = aio,
+ .err = err });
+ err = os_write_file(aio->reply_fd, &reply, sizeof(reply));
+ if(err != sizeof(reply))
+ printk("submit_aio_26 - write failed, "
+ "fd = %d, err = %d\n", aio->reply_fd, -err);
+ else err = 0;
+ }
+
+ return err;
+}
+
+static int init_aio_26(void)
+{
+ unsigned long stack;
+ int err;
+
+ if(io_setup(256, &ctx)){
+ printk("aio_thread failed to initialize context, err = %d\n",
+ errno);
+ return -errno;
+ }
+
+ err = run_helper_thread(aio_thread, NULL,
+ CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
+ if(err < 0)
+ return -errno;
+
+ aio_pid = err;
+
+ printk("Using 2.6 host AIO\n");
+
+ submit_proc = submit_aio_26;
+
+ return 0;
+}
+
+#else
+#define DEFAULT_24_AIO 1
+static int submit_aio_26(struct aio_context *aio)
+{
+ return -ENOSYS;
+}
+
+static int init_aio_26(void)
+{
+ submit_proc = submit_aio_26;
+ return -ENOSYS;
+}
+#endif
+
+static int aio_24 = DEFAULT_24_AIO;
+
+static int __init set_aio_24(char *name, int *add)
+{
+ aio_24 = 1;
+ return 0;
+}
+
+__uml_setup("aio=2.4", set_aio_24,
+"aio=2.4\n"
+" This is used to force UML to use 2.4-style AIO even when 2.6 AIO is\n"
+" available. 2.4 AIO is a single thread that handles one request at a\n"
+" time, synchronously. 2.6 AIO is a thread which uses the 2.6 AIO \n"
+" interface to handle an arbitrary number of pending requests. 2.6 AIO \n"
+" is not available in tt mode, on 2.4 hosts, or when UML is built with\n"
+" /usr/include/linux/aio_abi.h not available. Many distributions don't\n"
+" include aio_abi.h, so you will need to copy it from a kernel tree to\n"
+" your /usr/include/linux in order to build an AIO-capable UML\n\n"
+);
+
+static int init_aio(void)
+{
+ int err;
+
+ CHOOSE_MODE(({
+ if(!aio_24){
+ printk("Disabling 2.6 AIO in tt mode\n");
+ aio_24 = 1;
+ } }), (void) 0);
+
+ if(!aio_24){
+ err = init_aio_26();
+ if(err && (errno == ENOSYS)){
+ printk("2.6 AIO not supported on the host - "
+ "reverting to 2.4 AIO\n");
+ aio_24 = 1;
+ }
+ else return err;
+ }
+
+ if(aio_24)
+ return init_aio_24();
+
+ return 0;
+}
+
+/* The reason for the __initcall/__uml_exitcall asymmetry is that init_aio
+ * needs to be called when the kernel is running because it calls run_helper,
+ * which needs get_free_page. exit_aio is a __uml_exitcall because the generic
+ * kernel does not run __exitcalls on shutdown, and can't because many of them
+ * break when called outside of module unloading.
+ */
+__initcall(init_aio);
+
+static void exit_aio(void)
+{
+ if(aio_pid != -1)
+ os_kill_process(aio_pid, 1);
+}
+
+__uml_exitcall(exit_aio);
+
+int submit_aio(struct aio_context *aio)
+{
+ return (*submit_proc)(aio);
+}
diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c
index 4cca3e9c23f..1399520a858 100644
--- a/arch/um/os-Linux/elf_aux.c
+++ b/arch/um/os-Linux/elf_aux.c
@@ -12,8 +12,9 @@
#include "init.h"
#include "elf_user.h"
#include "mem_user.h"
+#include <kernel-offsets.h>
-#if ELF_CLASS == ELFCLASS32
+#if HOST_ELF_CLASS == ELFCLASS32
typedef Elf32_auxv_t elf_auxv_t;
#else
typedef Elf64_auxv_t elf_auxv_t;
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 1e126bfd31a..d32413e4b4c 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -3,10 +3,10 @@
* Licensed under the GPL
*/
-#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
+#include <setjmp.h>
#include <linux/unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
@@ -14,6 +14,10 @@
#include "os.h"
#include "user.h"
#include "user_util.h"
+#include "signal_user.h"
+#include "process.h"
+#include "irq_user.h"
+#include "kern_util.h"
#define ARBITRARY_ADDR -1
#define FAILURE_PID -1
@@ -114,8 +118,10 @@ void os_usr1_process(int pid)
kill(pid, SIGUSR1);
}
-/*Don't use the glibc version, which caches the result in TLS. It misses some
- * syscalls, and also breaks with clone(), which does not unshare the TLS.*/
+/* Don't use the glibc version, which caches the result in TLS. It misses some
+ * syscalls, and also breaks with clone(), which does not unshare the TLS.
+ */
+
inline _syscall0(pid_t, getpid)
int os_getpid(void)
@@ -164,6 +170,52 @@ int os_unmap_memory(void *addr, int len)
return(0);
}
+void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
+{
+ int flags = 0, pages;
+
+ if(sig_stack != NULL){
+ pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER);
+ set_sigstack(sig_stack, pages * page_size());
+ flags = SA_ONSTACK;
+ }
+ if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1);
+}
+
+void init_new_thread_signals(int altstack)
+{
+ int flags = altstack ? SA_ONSTACK : 0;
+
+ set_handler(SIGSEGV, (__sighandler_t) sig_handler, flags,
+ SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ set_handler(SIGTRAP, (__sighandler_t) sig_handler, flags,
+ SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ set_handler(SIGFPE, (__sighandler_t) sig_handler, flags,
+ SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ set_handler(SIGILL, (__sighandler_t) sig_handler, flags,
+ SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
+ SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ set_handler(SIGUSR2, (__sighandler_t) sig_handler,
+ flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+ signal(SIGHUP, SIG_IGN);
+
+ init_irq_signals(altstack);
+}
+
+int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
+{
+ sigjmp_buf buf;
+ int n;
+
+ *jmp_ptr = &buf;
+ n = sigsetjmp(buf, 1);
+ if(n != 0)
+ return(n);
+ (*fn)(arg);
+ return(0);
+}
+
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
diff --git a/arch/um/kernel/process.c b/arch/um/os-Linux/start_up.c
index 67acd92c532..040cc1472bc 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/os-Linux/start_up.c
@@ -1,4 +1,4 @@
-/*
+/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
@@ -19,7 +19,6 @@
#include "user_util.h"
#include "kern_util.h"
#include "user.h"
-#include "process.h"
#include "signal_kern.h"
#include "signal_user.h"
#include "sysdep/ptrace.h"
@@ -39,98 +38,6 @@
#include "registers.h"
#endif
-void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
-{
- int flags = 0, pages;
-
- if(sig_stack != NULL){
- pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER);
- set_sigstack(sig_stack, pages * page_size());
- flags = SA_ONSTACK;
- }
- if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1);
-}
-
-void init_new_thread_signals(int altstack)
-{
- int flags = altstack ? SA_ONSTACK : 0;
-
- set_handler(SIGSEGV, (__sighandler_t) sig_handler, flags,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- set_handler(SIGTRAP, (__sighandler_t) sig_handler, flags,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- set_handler(SIGFPE, (__sighandler_t) sig_handler, flags,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- set_handler(SIGILL, (__sighandler_t) sig_handler, flags,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
- SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- set_handler(SIGUSR2, (__sighandler_t) sig_handler,
- flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
- signal(SIGHUP, SIG_IGN);
-
- init_irq_signals(altstack);
-}
-
-struct tramp {
- int (*tramp)(void *);
- void *tramp_data;
- unsigned long temp_stack;
- int flags;
- int pid;
-};
-
-/* See above for why sigkill is here */
-
-int sigkill = SIGKILL;
-
-int outer_tramp(void *arg)
-{
- struct tramp *t;
- int sig = sigkill;
-
- t = arg;
- t->pid = clone(t->tramp, (void *) t->temp_stack + page_size()/2,
- t->flags, t->tramp_data);
- if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);
- kill(os_getpid(), sig);
- _exit(0);
-}
-
-int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
- int clone_flags, int (*tramp)(void *))
-{
- struct tramp arg;
- unsigned long sp;
- int new_pid, status, err;
-
- /* The trampoline will run on the temporary stack */
- sp = stack_sp(temp_stack);
-
- clone_flags |= CLONE_FILES | SIGCHLD;
-
- arg.tramp = tramp;
- arg.tramp_data = thread_arg;
- arg.temp_stack = temp_stack;
- arg.flags = clone_flags;
-
- /* Start the process and wait for it to kill itself */
- new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);
- if(new_pid < 0)
- return(new_pid);
-
- CATCH_EINTR(err = waitpid(new_pid, &status, 0));
- if(err < 0)
- panic("Waiting for outer trampoline failed - errno = %d",
- errno);
-
- if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))
- panic("outer trampoline didn't exit with SIGKILL, "
- "status = %d", status);
-
- return(arg.pid);
-}
-
static int ptrace_child(void *arg)
{
int ret;
@@ -165,7 +72,7 @@ static int start_ptraced_child(void **stack_out)
void *stack;
unsigned long sp;
int pid, n, status;
-
+
stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if(stack == MAP_FAILED)
@@ -173,10 +80,10 @@ static int start_ptraced_child(void **stack_out)
sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);
pid = clone(ptrace_child, (void *) sp, SIGCHLD, NULL);
if(pid < 0)
- panic("check_ptrace : clone failed, errno = %d", errno);
+ panic("start_ptraced_child : clone failed, errno = %d", errno);
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
if(n < 0)
- panic("check_ptrace : wait failed, errno = %d", errno);
+ panic("check_ptrace : clone failed, errno = %d", errno);
if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP))
panic("check_ptrace : expected SIGSTOP, got status = %d",
status);
@@ -185,11 +92,14 @@ static int start_ptraced_child(void **stack_out)
return(pid);
}
-/* When testing for SYSEMU support, if it is one of the broken versions, we must
- * just avoid using sysemu, not panic, but only if SYSEMU features are broken.
+/* When testing for SYSEMU support, if it is one of the broken versions, we
+ * must just avoid using sysemu, not panic, but only if SYSEMU features are
+ * broken.
* So only for SYSEMU features we test mustpanic, while normal host features
- * must work anyway!*/
-static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
+ * must work anyway!
+ */
+static int stop_ptraced_child(int pid, void *stack, int exitcode,
+ int mustpanic)
{
int status, n, ret = 0;
@@ -217,8 +127,6 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
return ret;
}
-static int force_sysemu_disabled = 0;
-
int ptrace_faultinfo = 1;
int proc_mm = 1;
@@ -228,29 +136,32 @@ static int __init skas0_cmd_param(char *str, int* add)
return 0;
}
+__uml_setup("skas0", skas0_cmd_param,
+ "skas0\n"
+ " Disables SKAS3 usage, so that SKAS0 is used, unless \n"
+ " you specify mode=tt.\n\n");
+
+static int force_sysemu_disabled = 0;
+
static int __init nosysemu_cmd_param(char *str, int* add)
{
force_sysemu_disabled = 1;
return 0;
}
-__uml_setup("skas0", skas0_cmd_param,
- "skas0\n"
- " Disables SKAS3 usage, so that SKAS0 is used, unless you \n"
- " specify mode=tt.\n\n");
-
__uml_setup("nosysemu", nosysemu_cmd_param,
- "nosysemu\n"
- " Turns off syscall emulation patch for ptrace (SYSEMU) on.\n"
- " SYSEMU is a performance-patch introduced by Laurent Vivier. It changes\n"
- " behaviour of ptrace() and helps reducing host context switch rate.\n"
- " To make it working, you need a kernel patch for your host, too.\n"
- " See http://perso.wanadoo.fr/laurent.vivier/UML/ for further information.\n\n");
+"nosysemu\n"
+" Turns off syscall emulation patch for ptrace (SYSEMU) on.\n"
+" SYSEMU is a performance-patch introduced by Laurent Vivier. It changes\n"
+" behaviour of ptrace() and helps reducing host context switch rate.\n"
+" To make it working, you need a kernel patch for your host, too.\n"
+" See http://perso.wanadoo.fr/laurent.vivier/UML/ for further \n"
+" information.\n\n");
static void __init check_sysemu(void)
{
void *stack;
- int pid, syscall, n, status, count=0;
+ int pid, n, status, count=0;
printk("Checking syscall emulation patch for ptrace...");
sysemu_supported = 0;
@@ -281,6 +192,12 @@ static void __init check_sysemu(void)
printk("Checking advanced syscall emulation patch for ptrace...");
pid = start_ptraced_child(&stack);
+
+ if(ptrace(PTRACE_OLDSETOPTIONS, pid, 0,
+ (void *) PTRACE_O_TRACESYSGOOD) < 0)
+ panic("check_ptrace: PTRACE_OLDSETOPTIONS failed, errno = %d",
+ errno);
+
while(1){
count++;
if(ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0)
@@ -288,15 +205,10 @@ static void __init check_sysemu(void)
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
if(n < 0)
panic("check_ptrace : wait failed, errno = %d", errno);
- if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP))
- panic("check_ptrace : expected (SIGTRAP|SYSCALL_TRAP), "
- "got status = %d", status);
-
- syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET,
- 0);
- if(syscall == __NR_getpid){
+ if(WIFSTOPPED(status) && (WSTOPSIG(status) == (SIGTRAP|0x80))){
if (!count)
- panic("check_ptrace : SYSEMU_SINGLESTEP doesn't singlestep");
+ panic("check_ptrace : SYSEMU_SINGLESTEP "
+ "doesn't singlestep");
n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET,
os_getpid());
if(n < 0)
@@ -304,6 +216,11 @@ static void __init check_sysemu(void)
"call return, errno = %d", errno);
break;
}
+ else if(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP))
+ count++;
+ else
+ panic("check_ptrace : expected SIGTRAP or "
+ "(SIGTRAP|0x80), got status = %d", status);
}
if (stop_ptraced_child(pid, stack, 0, 0) < 0)
goto fail_stopped;
@@ -321,7 +238,7 @@ fail_stopped:
printk("missing\n");
}
-void __init check_ptrace(void)
+static void __init check_ptrace(void)
{
void *stack;
int pid, syscall, n, status;
@@ -329,20 +246,20 @@ void __init check_ptrace(void)
printk("Checking that ptrace can change system call numbers...");
pid = start_ptraced_child(&stack);
- if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
- panic("check_ptrace: PTRACE_SETOPTIONS failed, errno = %d", errno);
+ if(ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
+ panic("check_ptrace: PTRACE_OLDSETOPTIONS failed, errno = %d", errno);
while(1){
if(ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0)
- panic("check_ptrace : ptrace failed, errno = %d",
+ panic("check_ptrace : ptrace failed, errno = %d",
errno);
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
if(n < 0)
panic("check_ptrace : wait failed, errno = %d", errno);
- if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP + 0x80))
- panic("check_ptrace : expected SIGTRAP + 0x80, "
+ if(!WIFSTOPPED(status) || (WSTOPSIG(status) != (SIGTRAP|0x80)))
+ panic("check_ptrace : expected (SIGTRAP|0x80), "
"got status = %d", status);
-
+
syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET,
0);
if(syscall == __NR_getpid){
@@ -359,33 +276,36 @@ void __init check_ptrace(void)
check_sysemu();
}
-int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
+void os_early_checks(void)
{
- sigjmp_buf buf;
- int n;
-
- *jmp_ptr = &buf;
- n = sigsetjmp(buf, 1);
- if(n != 0)
- return(n);
- (*fn)(arg);
- return(0);
+ check_ptrace();
}
-void forward_pending_sigio(int target)
+static int __init noprocmm_cmd_param(char *str, int* add)
{
- sigset_t sigs;
+ proc_mm = 0;
+ return 0;
+}
+
+__uml_setup("noprocmm", noprocmm_cmd_param,
+"noprocmm\n"
+" Turns off usage of /proc/mm, even if host supports it.\n"
+" To support /proc/mm, the host needs to be patched using\n"
+" the current skas3 patch.\n\n");
- if(sigpending(&sigs))
- panic("forward_pending_sigio : sigpending failed");
- if(sigismember(&sigs, SIGIO))
- kill(target, SIGIO);
+static int __init noptracefaultinfo_cmd_param(char *str, int* add)
+{
+ ptrace_faultinfo = 0;
+ return 0;
}
-extern void *__syscall_stub_start, __syscall_stub_end;
+__uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param,
+"noptracefaultinfo\n"
+" Turns off usage of PTRACE_FAULTINFO, even if host supports\n"
+" it. To support PTRACE_FAULTINFO, the host needs to be patched\n"
+" using the current skas3 patch.\n\n");
#ifdef UML_CONFIG_MODE_SKAS
-
static inline void check_skas3_ptrace_support(void)
{
struct ptrace_faultinfo fi;
@@ -400,9 +320,8 @@ static inline void check_skas3_ptrace_support(void)
ptrace_faultinfo = 0;
if(errno == EIO)
printf("not found\n");
- else {
+ else
perror("not found");
- }
}
else {
if (!ptrace_faultinfo)
@@ -419,9 +338,10 @@ int can_do_skas(void)
{
printf("Checking for /proc/mm...");
if (os_access("/proc/mm", OS_ACC_W_OK) < 0) {
- proc_mm = 0;
+ proc_mm = 0;
printf("not found\n");
- } else {
+ }
+ else {
if (!proc_mm)
printf("found but disabled on command line\n");
else
diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
new file mode 100644
index 00000000000..5b047ab8416
--- /dev/null
+++ b/arch/um/os-Linux/tt.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sched.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <sys/time.h>
+#include <sys/ptrace.h>
+#include <linux/ptrace.h>
+#include <sys/wait.h>
+#include <sys/mman.h>
+#include <asm/ptrace.h>
+#include <asm/unistd.h>
+#include <asm/page.h>
+#include "user_util.h"
+#include "kern_util.h"
+#include "user.h"
+#include "signal_kern.h"
+#include "signal_user.h"
+#include "sysdep/ptrace.h"
+#include "sysdep/sigcontext.h"
+#include "irq_user.h"
+#include "ptrace_user.h"
+#include "time_user.h"
+#include "init.h"
+#include "os.h"
+#include "uml-config.h"
+#include "choose-mode.h"
+#include "mode.h"
+#include "tempfile.h"
+
+/*
+ *-------------------------
+ * only for tt mode (will be deleted in future...)
+ *-------------------------
+ */
+
+struct tramp {
+ int (*tramp)(void *);
+ void *tramp_data;
+ unsigned long temp_stack;
+ int flags;
+ int pid;
+};
+
+/* See above for why sigkill is here */
+
+int sigkill = SIGKILL;
+
+int outer_tramp(void *arg)
+{
+ struct tramp *t;
+ int sig = sigkill;
+
+ t = arg;
+ t->pid = clone(t->tramp, (void *) t->temp_stack + page_size()/2,
+ t->flags, t->tramp_data);
+ if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);
+ kill(os_getpid(), sig);
+ _exit(0);
+}
+
+int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
+ int clone_flags, int (*tramp)(void *))
+{
+ struct tramp arg;
+ unsigned long sp;
+ int new_pid, status, err;
+
+ /* The trampoline will run on the temporary stack */
+ sp = stack_sp(temp_stack);
+
+ clone_flags |= CLONE_FILES | SIGCHLD;
+
+ arg.tramp = tramp;
+ arg.tramp_data = thread_arg;
+ arg.temp_stack = temp_stack;
+ arg.flags = clone_flags;
+
+ /* Start the process and wait for it to kill itself */
+ new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);
+ if(new_pid < 0)
+ return(new_pid);
+
+ CATCH_EINTR(err = waitpid(new_pid, &status, 0));
+ if(err < 0)
+ panic("Waiting for outer trampoline failed - errno = %d",
+ errno);
+
+ if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))
+ panic("outer trampoline didn't exit with SIGKILL, "
+ "status = %d", status);
+
+ return(arg.pid);
+}
+
+void forward_pending_sigio(int target)
+{
+ sigset_t sigs;
+
+ if(sigpending(&sigs))
+ panic("forward_pending_sigio : sigpending failed");
+ if(sigismember(&sigs, SIGIO))
+ kill(target, SIGIO);
+}
+
diff --git a/arch/um/scripts/Makefile.unmap b/arch/um/scripts/Makefile.unmap
index 802d027a1e1..b2165188d94 100644
--- a/arch/um/scripts/Makefile.unmap
+++ b/arch/um/scripts/Makefile.unmap
@@ -12,7 +12,7 @@ $(obj)/unmap.o: _c_flags = $(call unprofile,$(CFLAGS))
quiet_cmd_wrapld = LD $@
define cmd_wrapld
- $(LD) $(LDFLAGS) -r -o $(obj)/unmap_tmp.o $< $(shell $(CC) $(CFLAGS) -print-file-name=libc.a); \
+ $(LD) $(LDFLAGS) -r -o $(obj)/unmap_tmp.o $< ; \
$(OBJCOPY) $(UML_OBJCOPYFLAGS) $(obj)/unmap_tmp.o $@ -G switcheroo
endef
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 77c3c4d29f5..4ca2a229da4 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -16,13 +16,7 @@ semaphore.c-dir = kernel
highmem.c-dir = mm
module.c-dir = kernel
-STUB_CFLAGS = -Wp,-MD,$(depfile) $(call unprofile,$(USER_CFLAGS))
-
-# _cflags works with kernel files, not with userspace ones, but c_flags does,
-# why ask why?
-$(obj)/stub_segv.o : c_flags = $(STUB_CFLAGS)
-
-$(obj)/stub.o : a_flags = $(STUB_CFLAGS)
+$(obj)/stub_segv.o : _c_flags = $(call unprofile,$(CFLAGS))
subdir- := util
diff --git a/arch/um/sys-i386/kernel-offsets.c b/arch/um/sys-i386/kernel-offsets.c
index 9f8ecd1fdd9..a1070af2bcd 100644
--- a/arch/um/sys-i386/kernel-offsets.c
+++ b/arch/um/sys-i386/kernel-offsets.c
@@ -2,6 +2,7 @@
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/time.h>
+#include <linux/elf.h>
#include <asm/page.h>
#define DEFINE(sym, val) \
diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c
index 4efc69a039d..16bc19928b3 100644
--- a/arch/um/sys-i386/signal.c
+++ b/arch/um/sys-i386/signal.c
@@ -122,9 +122,9 @@ int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext *from,
int err;
to_fp = to->fpstate;
- from_fp = from->fpstate;
sigs = to->oldmask;
err = copy_from_user(to, from, sizeof(*to));
+ from_fp = to->fpstate;
to->oldmask = sigs;
to->fpstate = to_fp;
if(to_fp != NULL)
diff --git a/arch/um/sys-i386/stub.S b/arch/um/sys-i386/stub.S
index 2f2c70a8f04..6a70d9ab5c2 100644
--- a/arch/um/sys-i386/stub.S
+++ b/arch/um/sys-i386/stub.S
@@ -2,7 +2,50 @@
.globl syscall_stub
.section .__syscall_stub, "x"
-syscall_stub:
- int $0x80
+
+ .globl batch_syscall_stub
+batch_syscall_stub:
+ /* load pointer to first operation */
+ mov $(UML_CONFIG_STUB_DATA+8), %esp
+
+again:
+ /* load length of additional data */
+ mov 0x0(%esp), %eax
+
+ /* if(length == 0) : end of list */
+ /* write possible 0 to header */
+ mov %eax, UML_CONFIG_STUB_DATA+4
+ cmpl $0, %eax
+ jz done
+
+ /* save current pointer */
+ mov %esp, UML_CONFIG_STUB_DATA+4
+
+ /* skip additional data */
+ add %eax, %esp
+
+ /* load syscall-# */
+ pop %eax
+
+ /* load syscall params */
+ pop %ebx
+ pop %ecx
+ pop %edx
+ pop %esi
+ pop %edi
+ pop %ebp
+
+ /* execute syscall */
+ int $0x80
+
+ /* check return value */
+ pop %ebx
+ cmp %ebx, %eax
+ je again
+
+done:
+ /* save return value */
mov %eax, UML_CONFIG_STUB_DATA
+
+ /* stop */
int3
diff --git a/arch/um/sys-i386/stub_segv.c b/arch/um/sys-i386/stub_segv.c
index 68aeabe3a65..1e88b275eda 100644
--- a/arch/um/sys-i386/stub_segv.c
+++ b/arch/um/sys-i386/stub_segv.c
@@ -3,8 +3,7 @@
* Licensed under the GPL
*/
-#include <signal.h>
-#include <asm/sigcontext.h>
+#include <asm/signal.h>
#include <asm/unistd.h>
#include "uml-config.h"
#include "sysdep/sigcontext.h"
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 7488206ce6f..f0ab574d1e9 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -6,7 +6,7 @@
#XXX: why into lib-y?
lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \
- ptrace.o ptrace_user.o semaphore.o sigcontext.o signal.o stub.o \
+ ptrace.o ptrace_user.o sigcontext.o signal.o stub.o \
stub_segv.o syscalls.o syscall_table.o sysrq.o thunk.o
obj-y := ksyms.o
@@ -15,7 +15,7 @@ obj-$(CONFIG_MODULES) += module.o um_module.o
USER_OBJS := ptrace_user.o sigcontext.o
SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c memcpy.S \
- semaphore.c thunk.S module.c
+ thunk.S module.c
include arch/um/scripts/Makefile.rules
@@ -24,17 +24,10 @@ csum-copy.S-dir = lib
csum-partial.c-dir = lib
csum-wrappers.c-dir = lib
memcpy.S-dir = lib
-semaphore.c-dir = kernel
thunk.S-dir = lib
module.c-dir = kernel
-STUB_CFLAGS = -Wp,-MD,$(depfile) $(call unprofile,$(USER_CFLAGS))
-
-# _cflags works with kernel files, not with userspace ones, but c_flags does,
-# why ask why?
-$(obj)/stub_segv.o : c_flags = $(STUB_CFLAGS)
-
-$(obj)/stub.o : a_flags = $(STUB_CFLAGS)
+$(obj)/stub_segv.o: _c_flags = $(call unprofile,$(CFLAGS))
subdir- := util
diff --git a/arch/um/sys-x86_64/kernel-offsets.c b/arch/um/sys-x86_64/kernel-offsets.c
index 220e875cbe2..998541eade4 100644
--- a/arch/um/sys-x86_64/kernel-offsets.c
+++ b/arch/um/sys-x86_64/kernel-offsets.c
@@ -2,6 +2,7 @@
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/time.h>
+#include <linux/elf.h>
#include <asm/page.h>
#define DEFINE(sym, val) \
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 8fdaed06c10..fe1d065332b 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -104,28 +104,35 @@ int copy_sc_to_user_skas(struct sigcontext *to, struct _fpstate *to_fp,
int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext *from,
int fpsize)
{
- struct _fpstate *to_fp, *from_fp;
- unsigned long sigs;
- int err;
-
- to_fp = to->fpstate;
- from_fp = from->fpstate;
- sigs = to->oldmask;
- err = copy_from_user(to, from, sizeof(*to));
- to->oldmask = sigs;
- return(err);
+ struct _fpstate *to_fp, *from_fp;
+ unsigned long sigs;
+ int err;
+
+ to_fp = to->fpstate;
+ sigs = to->oldmask;
+ err = copy_from_user(to, from, sizeof(*to));
+ from_fp = to->fpstate;
+ to->fpstate = to_fp;
+ to->oldmask = sigs;
+ if(to_fp != NULL)
+ err |= copy_from_user(to_fp, from_fp, fpsize);
+ return(err);
}
int copy_sc_to_user_tt(struct sigcontext *to, struct _fpstate *fp,
struct sigcontext *from, int fpsize)
{
- struct _fpstate *to_fp, *from_fp;
- int err;
-
- to_fp = (fp ? fp : (struct _fpstate *) (to + 1));
- from_fp = from->fpstate;
- err = copy_to_user(to, from, sizeof(*to));
- return(err);
+ struct _fpstate *to_fp, *from_fp;
+ int err;
+
+ to_fp = (fp ? fp : (struct _fpstate *) (to + 1));
+ from_fp = from->fpstate;
+ err = copy_to_user(to, from, sizeof(*to));
+ if(from_fp != NULL){
+ err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate));
+ err |= copy_to_user(to_fp, from_fp, fpsize);
+ }
+ return(err);
}
#endif
diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S
index 31c14925716..03c27973578 100644
--- a/arch/um/sys-x86_64/stub.S
+++ b/arch/um/sys-x86_64/stub.S
@@ -13,3 +13,54 @@ syscall_stub:
or %rcx, %rbx
movq %rax, (%rbx)
int3
+
+ .globl batch_syscall_stub
+batch_syscall_stub:
+ mov $(UML_CONFIG_STUB_DATA >> 32), %rbx
+ sal $32, %rbx
+ mov $(UML_CONFIG_STUB_DATA & 0xffffffff), %rax
+ or %rax, %rbx
+ /* load pointer to first operation */
+ mov %rbx, %rsp
+ add $0x10, %rsp
+again:
+ /* load length of additional data */
+ mov 0x0(%rsp), %rax
+
+ /* if(length == 0) : end of list */
+ /* write possible 0 to header */
+ mov %rax, 8(%rbx)
+ cmp $0, %rax
+ jz done
+
+ /* save current pointer */
+ mov %rsp, 8(%rbx)
+
+ /* skip additional data */
+ add %rax, %rsp
+
+ /* load syscall-# */
+ pop %rax
+
+ /* load syscall params */
+ pop %rdi
+ pop %rsi
+ pop %rdx
+ pop %r10
+ pop %r8
+ pop %r9
+
+ /* execute syscall */
+ syscall
+
+ /* check return value */
+ pop %rcx
+ cmp %rcx, %rax
+ je again
+
+done:
+ /* save return value */
+ mov %rax, (%rbx)
+
+ /* stop */
+ int3
diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c
index 161d1fe9c03..65a131b362b 100644
--- a/arch/um/sys-x86_64/stub_segv.c
+++ b/arch/um/sys-x86_64/stub_segv.c
@@ -3,9 +3,10 @@
* Licensed under the GPL
*/
-#include <signal.h>
+#include <asm/signal.h>
#include <linux/compiler.h>
#include <asm/unistd.h>
+#include <asm/ucontext.h>
#include "uml-config.h"
#include "sysdep/sigcontext.h"
#include "sysdep/faultinfo.h"