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-rw-r--r--arch/um/Makefile1
-rw-r--r--arch/um/Makefile-i3867
-rw-r--r--arch/um/Makefile-x86_643
-rw-r--r--arch/um/drivers/harddog_kern.c3
-rw-r--r--arch/um/drivers/mmapper_kern.c2
-rw-r--r--arch/um/drivers/random.c3
-rw-r--r--arch/um/drivers/ubd_kern.c1
-rw-r--r--arch/um/include/os.h2
-rw-r--r--arch/um/kernel/smp.c3
-rw-r--r--arch/um/kernel/um_arch.c2
-rw-r--r--arch/um/os-Linux/helper.c1
-rw-r--r--arch/um/os-Linux/skas/process.c2
-rw-r--r--arch/um/os-Linux/start_up.c25
-rw-r--r--arch/um/os-Linux/sys-i386/registers.c4
-rw-r--r--arch/um/os-Linux/sys-i386/task_size.c31
-rw-r--r--arch/um/os-Linux/sys-x86_64/task_size.c2
-rw-r--r--arch/um/os-Linux/time.c7
-rw-r--r--arch/um/sys-x86_64/ksyms.c4
18 files changed, 76 insertions, 27 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile
index dbeab15..ca40397 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -77,7 +77,6 @@ include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
-Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
KBUILD_CFLAGS += $(KERNEL_DEFINES)
-KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
PHONY += linux
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index 561e373..302cbe5 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -32,4 +32,11 @@ cflags-y += $(call cc-option,-mpreferred-stack-boundary=2)
# an unresolved reference.
cflags-y += -ffreestanding
+# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
+# a lot more stack due to the lack of sharing of stacklots. Also, gcc
+# 4.3.0 needs -funit-at-a-time for extern inline functions.
+KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
+ echo $(call cc-option,-fno-unit-at-a-time); \
+ else echo $(call cc-option,-funit-at-a-time); fi ;)
+
KBUILD_CFLAGS += $(cflags-y)
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index 8ed362f..a9cd7e7 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -21,3 +21,6 @@ HEADER_ARCH := x86
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64
LINK-y += -m64
+
+# Do unit-at-a-time unconditionally on x86_64, following the host
+KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c
index a9ad4bd..d332503 100644
--- a/arch/um/drivers/harddog_kern.c
+++ b/arch/um/drivers/harddog_kern.c
@@ -66,6 +66,7 @@ static int harddog_open(struct inode *inode, struct file *file)
int err = -EBUSY;
char *sock = NULL;
+ lock_kernel();
spin_lock(&lock);
if(timer_alive)
goto err;
@@ -82,9 +83,11 @@ static int harddog_open(struct inode *inode, struct file *file)
timer_alive = 1;
spin_unlock(&lock);
+ unlock_kernel();
return nonseekable_open(inode, file);
err:
spin_unlock(&lock);
+ unlock_kernel();
return err;
}
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index 67b2f55..eb24032 100644
--- a/arch/um/drivers/mmapper_kern.c
+++ b/arch/um/drivers/mmapper_kern.c
@@ -16,6 +16,7 @@
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/mm.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include "mem_user.h"
@@ -77,6 +78,7 @@ out:
static int mmapper_open(struct inode *inode, struct file *file)
{
+ cycle_kernel_lock();
return 0;
}
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index 4949044..6eabb70 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -7,6 +7,7 @@
* of the GNU General Public License, incorporated herein by reference.
*/
#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
@@ -33,6 +34,8 @@ static DECLARE_WAIT_QUEUE_HEAD(host_read_wait);
static int rng_dev_open (struct inode *inode, struct file *filp)
{
+ cycle_kernel_lock();
+
/* enforce read-only access to this chrdev */
if ((filp->f_mode & FMODE_READ) == 0)
return -EINVAL;
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 44ad160..b58fb89 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -49,7 +49,6 @@
#include "irq_user.h"
#include "irq_kern.h"
#include "ubd_user.h"
-#include "kern_util.h"
#include "os.h"
#include "mem.h"
#include "mem_kern.h"
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index e2716ac..db5be46 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -299,6 +299,6 @@ extern int os_arch_prctl(int pid, int code, unsigned long *addr);
extern int get_pty(void);
/* sys-$ARCH/task_size.c */
-extern unsigned long os_get_task_size(void);
+extern unsigned long os_get_top_address(void);
#endif
diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index e1062ec..be2d50c 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -214,8 +214,7 @@ void smp_call_function_slave(int cpu)
atomic_inc(&scf_finished);
}
-int smp_call_function(void (*_func)(void *info), void *_info, int nonatomic,
- int wait)
+int smp_call_function(void (*_func)(void *info), void *_info, int wait)
{
int cpus = num_online_cpus() - 1;
int i;
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 9db85b2..8d84250 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -274,7 +274,7 @@ int __init linux_main(int argc, char **argv)
if (have_root == 0)
add_arg(DEFAULT_COMMAND_LINE);
- host_task_size = os_get_task_size();
+ host_task_size = os_get_top_address();
/*
* TASK_SIZE needs to be PGDIR_SIZE aligned or else exit_mmap craps
* out
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c
index 74ca7aa..30860b8 100644
--- a/arch/um/os-Linux/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -7,6 +7,7 @@
#include <unistd.h>
#include <errno.h>
#include <sched.h>
+#include <linux/limits.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include "kern_constants.h"
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 6be028c..172ad8f 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -55,7 +55,7 @@ static int ptrace_dump_regs(int pid)
* Signals that are OK to receive in the stub - we'll just continue it.
* SIGWINCH will happen when UML is inside a detached screen.
*/
-#define STUB_SIG_MASK (1 << SIGVTALRM)
+#define STUB_SIG_MASK ((1 << SIGVTALRM) | (1 << SIGWINCH))
/* Signals that the stub will finish with - anything else is an error */
#define STUB_DONE_MASK (1 << SIGTRAP)
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index b4b36e0..183db26 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -121,8 +121,10 @@ static int stop_ptraced_child(int pid, int exitcode, int mustexit)
{
int status, n, ret = 0;
- if (ptrace(PTRACE_CONT, pid, 0, 0) < 0)
- fatal_perror("stop_ptraced_child : ptrace failed");
+ if (ptrace(PTRACE_CONT, pid, 0, 0) < 0) {
+ perror("stop_ptraced_child : ptrace failed");
+ return -1;
+ }
CATCH_EINTR(n = waitpid(pid, &status, 0));
if (!WIFEXITED(status) || (WEXITSTATUS(status) != exitcode)) {
int exit_with = WEXITSTATUS(status);
@@ -212,7 +214,7 @@ static void __init check_sysemu(void)
if (n < 0)
fatal_perror("check_sysemu : wait failed");
if (!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP))
- fatal("check_sysemu : expected SIGTRAP, got status = %d",
+ fatal("check_sysemu : expected SIGTRAP, got status = %d\n",
status);
if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0)
@@ -254,9 +256,11 @@ static void __init check_sysemu(void)
if (WIFSTOPPED(status) &&
(WSTOPSIG(status) == (SIGTRAP|0x80))) {
- if (!count)
- fatal("check_ptrace : SYSEMU_SINGLESTEP "
- "doesn't singlestep");
+ if (!count) {
+ non_fatal("check_ptrace : SYSEMU_SINGLESTEP "
+ "doesn't singlestep");
+ goto fail;
+ }
n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET,
os_getpid());
if (n < 0)
@@ -266,9 +270,12 @@ static void __init check_sysemu(void)
}
else if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP))
count++;
- else
- fatal("check_ptrace : expected SIGTRAP or "
- "(SIGTRAP | 0x80), got status = %d", status);
+ else {
+ non_fatal("check_ptrace : expected SIGTRAP or "
+ "(SIGTRAP | 0x80), got status = %d\n",
+ status);
+ goto fail;
+ }
}
if (stop_ptraced_child(pid, 0, 0) < 0)
goto fail_stopped;
diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c
index b487cbe..229f7a5 100644
--- a/arch/um/os-Linux/sys-i386/registers.c
+++ b/arch/um/os-Linux/sys-i386/registers.c
@@ -6,7 +6,7 @@
#include <errno.h>
#include <sys/ptrace.h>
-#include <asm/user.h>
+#include <sys/user.h>
#include "kern_constants.h"
#include "longjmp.h"
#include "user.h"
@@ -76,7 +76,7 @@ int put_fp_registers(int pid, unsigned long *regs)
void arch_init_registers(int pid)
{
- struct user_fxsr_struct fpx_regs;
+ struct user_fpxregs_struct fpx_regs;
int err;
err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
diff --git a/arch/um/os-Linux/sys-i386/task_size.c b/arch/um/os-Linux/sys-i386/task_size.c
index ccb49b0..be04c1e 100644
--- a/arch/um/os-Linux/sys-i386/task_size.c
+++ b/arch/um/os-Linux/sys-i386/task_size.c
@@ -63,7 +63,7 @@ static int page_ok(unsigned long page)
return ok;
}
-unsigned long os_get_task_size(void)
+unsigned long os_get_top_address(void)
{
struct sigaction sa, old;
unsigned long bottom = 0;
@@ -76,9 +76,9 @@ unsigned long os_get_task_size(void)
* hosts, but shouldn't hurt otherwise.
*/
unsigned long top = 0xffffd000 >> UM_KERN_PAGE_SHIFT;
- unsigned long test;
+ unsigned long test, original;
- printf("Locating the top of the address space ... ");
+ printf("Locating the bottom of the address space ... ");
fflush(stdout);
/*
@@ -89,16 +89,31 @@ unsigned long os_get_task_size(void)
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_NODEFER;
if (sigaction(SIGSEGV, &sa, &old)) {
- perror("os_get_task_size");
+ perror("os_get_top_address");
exit(1);
}
- if (!page_ok(bottom)) {
- fprintf(stderr, "Address 0x%x no good?\n",
- bottom << UM_KERN_PAGE_SHIFT);
+ /* Manually scan the address space, bottom-up, until we find
+ * the first valid page (or run out of them).
+ */
+ for (bottom = 0; bottom < top; bottom++) {
+ if (page_ok(bottom))
+ break;
+ }
+
+ /* If we've got this far, we ran out of pages. */
+ if (bottom == top) {
+ fprintf(stderr, "Unable to determine bottom of address "
+ "space.\n");
exit(1);
}
+ printf("0x%x\n", bottom << UM_KERN_PAGE_SHIFT);
+ printf("Locating the top of the address space ... ");
+ fflush(stdout);
+
+ original = bottom;
+
/* This could happen with a 4G/4G split */
if (page_ok(top))
goto out;
@@ -114,7 +129,7 @@ unsigned long os_get_task_size(void)
out:
/* Restore the old SIGSEGV handling */
if (sigaction(SIGSEGV, &old, NULL)) {
- perror("os_get_task_size");
+ perror("os_get_top_address");
exit(1);
}
top <<= UM_KERN_PAGE_SHIFT;
diff --git a/arch/um/os-Linux/sys-x86_64/task_size.c b/arch/um/os-Linux/sys-x86_64/task_size.c
index fad6f57..26a0dd1 100644
--- a/arch/um/os-Linux/sys-x86_64/task_size.c
+++ b/arch/um/os-Linux/sys-x86_64/task_size.c
@@ -1,4 +1,4 @@
-unsigned long os_get_task_size(unsigned long shift)
+unsigned long os_get_top_address(unsigned long shift)
{
/* The old value of CONFIG_TOP_ADDR */
return 0x7fc0000000;
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index bee98f4..dec5678 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -106,6 +106,10 @@ static void deliver_alarm(void)
unsigned long long this_tick = os_nsecs();
int one_tick = UM_NSEC_PER_SEC / UM_HZ;
+ /* Protection against the host's time going backwards */
+ if ((last_tick != 0) && (this_tick < last_tick))
+ this_tick = last_tick;
+
if (last_tick == 0)
last_tick = this_tick - one_tick;
@@ -148,6 +152,9 @@ static int after_sleep_interval(struct timespec *ts)
start_usecs = usec;
start_usecs -= skew / UM_NSEC_PER_USEC;
+ if (start_usecs < 0)
+ start_usecs = 0;
+
tv = ((struct timeval) { .tv_sec = start_usecs / UM_USEC_PER_SEC,
.tv_usec = start_usecs % UM_USEC_PER_SEC });
interval = ((struct itimerval) { { 0, usec }, tv });
diff --git a/arch/um/sys-x86_64/ksyms.c b/arch/um/sys-x86_64/ksyms.c
index 6604673..1db2fce 100644
--- a/arch/um/sys-x86_64/ksyms.c
+++ b/arch/um/sys-x86_64/ksyms.c
@@ -3,5 +3,9 @@
#include <asm/checksum.h>
/*XXX: we need them because they would be exported by x86_64 */
+#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
+EXPORT_SYMBOL(memcpy);
+#else
EXPORT_SYMBOL(__memcpy);
+#endif
EXPORT_SYMBOL(csum_partial);
generated by cgit v0.10.2 at 2024-11-20 12:34:07 (GMT)