search for: task_struct

...33 files changed, 5 insertions(+), 38 deletions(-) diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 31e8dbe..2fec2de 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -58,7 +58,6 @@ unsigned long get_wchan(struct task_struct *p); ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) #define cpu_relax() barrier() -#define cpu_relax_yield() cpu_relax() #define ARCH_HAS_PREFETCH #define ARCH_HAS_PREFETCHW diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index d102a49..6...

...33 files changed, 5 insertions(+), 38 deletions(-) diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 31e8dbe..2fec2de 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -58,7 +58,6 @@ unsigned long get_wchan(struct task_struct *p); ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) #define cpu_relax() barrier() -#define cpu_relax_yield() cpu_relax() #define ARCH_HAS_PREFETCH #define ARCH_HAS_PREFETCHW diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index d102a49..6...

...essor.h | 1 - 32 files changed, 33 deletions(-) diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 0556fda..31e8dbe 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -59,7 +59,6 @@ unsigned long get_wchan(struct task_struct *p); #define cpu_relax() barrier() #define cpu_relax_yield() cpu_relax() -#define cpu_relax_lowlatency() cpu_relax() #define ARCH_HAS_PREFETCH #define ARCH_HAS_PREFETCHW diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index 6c158d5..d102a49 100644 --- a/arch...

...33 files changed, 36 insertions(+), 3 deletions(-) diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 43a7559..0556fda 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -58,6 +58,7 @@ unsigned long get_wchan(struct task_struct *p); ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) #define cpu_relax() barrier() +#define cpu_relax_yield() cpu_relax() #define cpu_relax_lowlatency() cpu_relax() #define ARCH_HAS_PREFETCH diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h...

Hi, I am working on modifying Xen 3.4.3 for a security related project. I wanted to access the struct task_struct for a particular process running in DOM U. struct task_struct is a process descriptor maintained by the operating system. In linux it is usually present in linux/sched.h and it contains information such as process address space, process''s state etc. for a particular process. I went through...

...in_lock_prefetch(const void *x) > .ss1 = __KERNEL_CS, \ > .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ > }, \ > - .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ > + INIT_TSS_IO \ > } > > extern unsigned long thread_saved_pc(struct task_struct *tsk); > diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h > index 592a6a6..4db79ea 100644 > --- a/arch/x86/include/asm/syscalls.h > +++ b/arch/x86/include/asm/syscalls.h > @@ -16,9 +16,12 @@ > #include <linux/types.h> > > /* Common in...

...in_lock_prefetch(const void *x) > .ss1 = __KERNEL_CS, \ > .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ > }, \ > - .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ > + INIT_TSS_IO \ > } > > extern unsigned long thread_saved_pc(struct task_struct *tsk); > diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h > index 592a6a6..4db79ea 100644 > --- a/arch/x86/include/asm/syscalls.h > +++ b/arch/x86/include/asm/syscalls.h > @@ -16,9 +16,12 @@ > #include <linux/types.h> > > /* Common in...

...io.h diff --git a/arch/x86/kernel/process-io.h b/arch/x86/kernel/process-io.h new file mode 100644 index 0000000..d884444 --- /dev/null +++ b/arch/x86/kernel/process-io.h @@ -0,0 +1,22 @@ +#ifndef _X86_KERNEL_PROCESS_IO_H +#define _X86_KERNEL_PROCESS_IO_H + +static inline int copy_io_bitmap(struct task_struct *me, + struct task_struct *p) +{ + if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) { + p->thread.io_bitmap_ptr = kmemdup(me->thread.io_bitmap_ptr, + IO_BITMAP_BYTES, GFP_KERNEL); + if (!p->thread.io_bitmap_ptr) { + p->thread.io_bitmap_max = 0; + return -ENOMEM; +...

...io.h diff --git a/arch/x86/kernel/process-io.h b/arch/x86/kernel/process-io.h new file mode 100644 index 0000000..d884444 --- /dev/null +++ b/arch/x86/kernel/process-io.h @@ -0,0 +1,22 @@ +#ifndef _X86_KERNEL_PROCESS_IO_H +#define _X86_KERNEL_PROCESS_IO_H + +static inline int copy_io_bitmap(struct task_struct *me, + struct task_struct *p) +{ + if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) { + p->thread.io_bitmap_ptr = kmemdup(me->thread.io_bitmap_ptr, + IO_BITMAP_BYTES, GFP_KERNEL); + if (!p->thread.io_bitmap_ptr) { + p->thread.io_bitmap_max = 0; + return -ENOMEM; +...

...}, \ > - .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ > + INIT_TSS_IO \ > } > > extern unsigned long thread_saved_pc(struct task_struct *tsk); > diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h > index 592a6a6..4db79ea 100644 > --- a/arch/x86/include/asm/syscalls.h > +++ b/arch/x86/include/asm/syscalls.h > @@ -16,9 +16,12 @@ > #include <linux/types.h> > > /* Common in X8...

...@ -862,7 +897,7 @@ static inline void spin_lock_prefetch(const void *x) .ss1 = __KERNEL_CS, \ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ }, \ - .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ + INIT_TSS_IO \ } extern unsigned long thread_saved_pc(struct task_struct *tsk); diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h index 592a6a6..4db79ea 100644 --- a/arch/x86/include/asm/syscalls.h +++ b/arch/x86/include/asm/syscalls.h @@ -16,9 +16,12 @@ #include <linux/types.h> /* Common in X86_32 and X86_64 */ + +#ifdef CONFIG_X8...

...@ -862,7 +897,7 @@ static inline void spin_lock_prefetch(const void *x) .ss1 = __KERNEL_CS, \ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ }, \ - .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ + INIT_TSS_IO \ } extern unsigned long thread_saved_pc(struct task_struct *tsk); diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h index 592a6a6..4db79ea 100644 --- a/arch/x86/include/asm/syscalls.h +++ b/arch/x86/include/asm/syscalls.h @@ -16,9 +16,12 @@ #include <linux/types.h> /* Common in X86_32 and X86_64 */ + +#ifdef CONFIG_X8...

Peter, here is v2 with some improved patch descriptions and some fixes. The previous version has survived one day of linux-next and I only changed small parts. So unless there is some other issue, feel free to pull (or to apply the patches) to tip/locking. The following changes since commit 07d9a380680d1c0eb51ef87ff2eab5c994949e69: Linux 4.9-rc2 (2016-10-23 17:10:14 -0700) are available in

Peter, here is v2 with some improved patch descriptions and some fixes. The previous version has survived one day of linux-next and I only changed small parts. So unless there is some other issue, feel free to pull (or to apply the patches) to tip/locking. The following changes since commit 07d9a380680d1c0eb51ef87ff2eab5c994949e69: Linux 4.9-rc2 (2016-10-23 17:10:14 -0700) are available in

This patch series makes it possible to compile out the iopl and ioperm system calls, which allow privileged processes to request permission to directly poke I/O ports from userspace. Nothing on a modern Linux system uses these calls anymore, and anything new should be using /dev/port instead, or better yet writing a driver. Copying the bloat-o-meter stats from the final patch: 32-bit

This patch series makes it possible to compile out the iopl and ioperm system calls, which allow privileged processes to request permission to directly poke I/O ports from userspace. Nothing on a modern Linux system uses these calls anymore, and anything new should be using /dev/port instead, or better yet writing a driver. Copying the bloat-o-meter stats from the final patch: 32-bit

...race.h b/arch/x86/include/asm/stacktrace.h index 5ae5a68e469d..49600643faba 100644 --- a/arch/x86/include/asm/stacktrace.h +++ b/arch/x86/include/asm/stacktrace.h @@ -35,6 +35,8 @@ bool in_entry_stack(unsigned long *stack, struct stack_info *info); int get_stack_info(unsigned long *stack, struct task_struct *task, struct stack_info *info, unsigned long *visit_mask); +bool get_stack_info_noinstr(unsigned long *stack, struct task_struct *task, + struct stack_info *info); const char *stack_type_name(enum stack_type type); diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpsta...

This patch series makes it possible to compile out the userspace IO system calls, iopl and ioperm. The first patch does some 32/64 unification in copy_thread to make subsequent changes easier. The second patch simplifies the complex calculation of the TSS segment limit, which also makes it easier to change in the last patch. Patches 3-9 introduce helpers to make it easier to compile out IO.

This patch series makes it possible to compile out the userspace IO system calls, iopl and ioperm. The first patch does some 32/64 unification in copy_thread to make subsequent changes easier. The second patch simplifies the complex calculation of the TSS segment limit, which also makes it easier to change in the last patch. Patches 3-9 introduce helpers to make it easier to compile out IO.

...ackground threads spawned from different > userspace processes, we can't use a single global id per annotation. > Instead, the userspace process passes an id through the common_handle > field of the kcov_remote_arg struct. This id gets saved to the kcov_handle > field in the current task_struct and needs to be passed to the newly > spawned threads via custom annotations. Those threads should be in turn > annotated with kcov_remote_start/kcov_remote_stop. > > Signed-off-by: Andrey Konovalov <andreyknvl at google.com> > --- > Documentation/dev-tools/kcov.rst | 99 +...