search for: e86028b

...p->thread.io_bitmap_max = 0; + return -ENOMEM; + } + set_tsk_thread_flag(p, TIF_IO_BITMAP); + } else { + p->thread.io_bitmap_ptr = NULL; + } + + return 0; +} + +#endif /* _X86_KERNEL_PROCESS_IO_H */ diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 884f98f..e86028b 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -56,6 +56,8 @@ #include <asm/debugreg.h> #include <asm/switch_to.h> +#include "process-io.h" + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); asmlinkage void ret_from...

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

...ITMAP)) { - /* - * Clear any possible leftover bits: - */ - memset(tss->io_bitmap, 0xff, prev->io_bitmap_max); - } + switch_io_bitmap(tss, prev_p, next_p); propagate_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_counte...

...memset(tss->io_bitmap, 0xff, prev->io_bitmap_max); > - } > + switch_io_bitmap(tss, prev_p, next_p); > propagate_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 = X8...

...memset(tss->io_bitmap, 0xff, prev->io_bitmap_max); > - } > + switch_io_bitmap(tss, prev_p, next_p); > propagate_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 = X8...

...over bits: > - */ > - memset(tss->io_bitmap, 0xff, prev->io_bitmap_max); > - } > + switch_io_bitmap(tss, prev_p, next_p); > propagate_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_F...

...over bits: > - */ > - memset(tss->io_bitmap, 0xff, prev->io_bitmap_max); > - } > + switch_io_bitmap(tss, prev_p, next_p); > propagate_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_F...