search for: childreg

...lude "process-io.h" + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); @@ -135,7 +137,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, { struct pt_regs *childregs = task_pt_regs(p); struct task_struct *tsk; - int err; p->thread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -167,36 +168,22 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, task_user_gs(p) = get_user_gs(current_pt_regs()); p...

...lude "process-io.h" + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); @@ -134,7 +136,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, { struct pt_regs *childregs = task_pt_regs(p); struct task_struct *tsk; - int err; p->thread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -166,32 +167,19 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.io_bitmap_ptr = NULL; tsk = current; -...

...lude "process-io.h" + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); @@ -134,7 +136,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, { struct pt_regs *childregs = task_pt_regs(p); struct task_struct *tsk; - int err; p->thread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -166,32 +167,19 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.io_bitmap_ptr = NULL; tsk = current; -...

...lude "process-io.h" + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); @@ -134,7 +136,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, { struct pt_regs *childregs = task_pt_regs(p); struct task_struct *tsk; - int err; p->thread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -168,34 +169,21 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.fpu_counter = 0; p->thread.io_bitmap_...

...lude "process-io.h" + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); @@ -134,7 +136,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, { struct pt_regs *childregs = task_pt_regs(p); struct task_struct *tsk; - int err; p->thread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -168,34 +169,21 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.fpu_counter = 0; p->thread.io_bitmap_...

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.

...> diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c > index 07550ff..3b82293 100644 > --- a/arch/x86/kernel/process_32.c > +++ b/arch/x86/kernel/process_32.c > @@ -154,7 +154,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, > childregs->orig_ax = -1; > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > return...

...e_user_return_notify(prev_p, next_p); } diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 07550ff..3b82293 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -154,7 +154,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->orig_ax = -1; childregs->cs = __KERNEL_CS | get_kernel_rpl(); childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); return 0; } *childregs = *current_pt_regs(); @@ -165,7 +165,7 @@ int copy_thread(unsigned lo...

...e_user_return_notify(prev_p, next_p); } diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 07550ff..3b82293 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -154,7 +154,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->orig_ax = -1; childregs->cs = __KERNEL_CS | get_kernel_rpl(); childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); return 0; } *childregs = *current_pt_regs(); @@ -165,7 +165,7 @@ int copy_thread(unsigned lo...

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

...t; } > > diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c > index e86028b..dc780cb 100644 > --- a/arch/x86/kernel/process_32.c > +++ b/arch/x86/kernel/process_32.c > @@ -155,7 +155,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); >...

...t; } > > diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c > index e86028b..dc780cb 100644 > --- a/arch/x86/kernel/process_32.c > +++ b/arch/x86/kernel/process_32.c > @@ -155,7 +155,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); >...

...e_user_return_notify(prev_p, next_p); } diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index e86028b..dc780cb 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -155,7 +155,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->cs = __KERNEL_CS | get_kernel_rpl(); childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; p->fpu_counter = 0; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); return 0; } @@ -269,14 +269...

...e_user_return_notify(prev_p, next_p); } diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 73a38c8..38eaae4 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -154,7 +154,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->cs = __KERNEL_CS | get_kernel_rpl(); childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; p->thread.fpu_counter = 0; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); return 0; } @@ -167,...

...> diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c > index e86028b..dc780cb 100644 > --- a/arch/x86/kernel/process_32.c > +++ b/arch/x86/kernel/process_32.c > @@ -155,7 +155,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p-&g...

...> diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c > index e86028b..dc780cb 100644 > --- a/arch/x86/kernel/process_32.c > +++ b/arch/x86/kernel/process_32.c > @@ -155,7 +155,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p-&g...