search for: fork_lik

...o obj-$(CONFIG_IRQ_WORK) += irq_work.o obj-y += probe_roms.o diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index df088bb..1e6a74e0 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -609,6 +609,11 @@ ENTRY(stub_\func) END(stub_\func) .endm + FORK_LIKE clone + FORK_LIKE fork + FORK_LIKE vfork + +#ifdef CONFIG_X86_IOPORT .macro FIXED_FRAME label,func ENTRY(\label) CFI_STARTPROC @@ -621,10 +626,8 @@ ENTRY(\label) END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONF...

...o obj-$(CONFIG_IRQ_WORK) += irq_work.o obj-y += probe_roms.o diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index df088bb..1e6a74e0 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -609,6 +609,11 @@ ENTRY(stub_\func) END(stub_\func) .endm + FORK_LIKE clone + FORK_LIKE fork + FORK_LIKE vfork + +#ifdef CONFIG_X86_IOPORT .macro FIXED_FRAME label,func ENTRY(\label) CFI_STARTPROC @@ -621,10 +626,8 @@ ENTRY(\label) END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONF...

...NFIG_DOUBLEFAULT /* Set up doublefault TSS pointer in the GDT */ diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 1b69951..eb4f5ba 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -844,6 +844,11 @@ ENTRY(stub_\func) END(stub_\func) .endm + FORK_LIKE clone + FORK_LIKE fork + FORK_LIKE vfork + +#ifdef CONFIG_X86_IOPORT .macro FIXED_FRAME label,func ENTRY(\label) CFI_STARTPROC @@ -856,10 +861,8 @@ ENTRY(\label) END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONF...

...NFIG_DOUBLEFAULT /* Set up doublefault TSS pointer in the GDT */ diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 1e96c36..d2d873a 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -829,6 +829,11 @@ ENTRY(stub_\func) END(stub_\func) .endm + FORK_LIKE clone + FORK_LIKE fork + FORK_LIKE vfork + +#ifdef CONFIG_X86_IOPORT .macro FIXED_FRAME label,func ENTRY(\label) CFI_STARTPROC @@ -841,10 +846,8 @@ ENTRY(\label) END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONF...

...the GDT */ > diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S > index 1b69951..eb4f5ba 100644 > --- a/arch/x86/kernel/entry_64.S > +++ b/arch/x86/kernel/entry_64.S > @@ -844,6 +844,11 @@ ENTRY(stub_\func) > END(stub_\func) > .endm > > + FORK_LIKE clone > + FORK_LIKE fork > + FORK_LIKE vfork > + > +#ifdef CONFIG_X86_IOPORT > .macro FIXED_FRAME label,func > ENTRY(\label) > CFI_STARTPROC > @@ -856,10 +861,8 @@ ENTRY(\label) > END(\label) > .endm > > - FORK_LIKE...

...the GDT */ > diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S > index 1b69951..eb4f5ba 100644 > --- a/arch/x86/kernel/entry_64.S > +++ b/arch/x86/kernel/entry_64.S > @@ -844,6 +844,11 @@ ENTRY(stub_\func) > END(stub_\func) > .endm > > + FORK_LIKE clone > + FORK_LIKE fork > + FORK_LIKE vfork > + > +#ifdef CONFIG_X86_IOPORT > .macro FIXED_FRAME label,func > ENTRY(\label) > CFI_STARTPROC > @@ -856,10 +861,8 @@ ENTRY(\label) > END(\label) > .endm > > - FORK_LIKE...

The 32-bit and 64-bit versions of copy_thread have functionally identical handling for copying the I/O bitmap, modulo differences in error handling. Clean up the error paths in both by moving the copy of the I/O bitmap to the end, to eliminate the need to free it if subsequent copy steps fail; move the resulting identical code to a static inline in a common header. Signed-off-by: Josh Triplett

The 32-bit and 64-bit versions of copy_thread have functionally identical handling for copying the I/O bitmap, modulo differences in error handling. Clean up the error paths in both by moving the copy of the I/O bitmap to the end, to eliminate the need to free it if subsequent copy steps fail; move the resulting identical code to a static inline in a common header. Signed-off-by: Josh Triplett

...the GDT */ > diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S > index df088bb..1e6a74e0 100644 > --- a/arch/x86/kernel/entry_64.S > +++ b/arch/x86/kernel/entry_64.S > @@ -609,6 +609,11 @@ ENTRY(stub_\func) > END(stub_\func) > .endm > > + FORK_LIKE clone > + FORK_LIKE fork > + FORK_LIKE vfork > + > +#ifdef CONFIG_X86_IOPORT > .macro FIXED_FRAME label,func > ENTRY(\label) > CFI_STARTPROC > @@ -621,10 +626,8 @@ ENTRY(\label) > END(\label) > .endm > > - FORK_LIKE...

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

...FIG_DOUBLEFAULT /* Set up doublefault TSS pointer in the GDT */ diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index df088bb..1e6a74e0 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -609,6 +609,11 @@ ENTRY(stub_\func) END(stub_\func) .endm + FORK_LIKE clone + FORK_LIKE fork + FORK_LIKE vfork + +#ifdef CONFIG_X86_IOPORT .macro FIXED_FRAME label,func ENTRY(\label) CFI_STARTPROC @@ -621,10 +626,8 @@ ENTRY(\label) END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONF...

...FIG_DOUBLEFAULT /* Set up doublefault TSS pointer in the GDT */ diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index df088bb..1e6a74e0 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -609,6 +609,11 @@ ENTRY(stub_\func) END(stub_\func) .endm + FORK_LIKE clone + FORK_LIKE fork + FORK_LIKE vfork + +#ifdef CONFIG_X86_IOPORT .macro FIXED_FRAME label,func ENTRY(\label) CFI_STARTPROC @@ -621,10 +626,8 @@ ENTRY(\label) END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONF...

...pointer in the GDT */ > diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S > index 1b69951..eb4f5ba 100644 > --- a/arch/x86/kernel/entry_64.S > +++ b/arch/x86/kernel/entry_64.S > @@ -844,6 +844,11 @@ ENTRY(stub_\func) > END(stub_\func) > .endm > > + FORK_LIKE clone > + FORK_LIKE fork > + FORK_LIKE vfork > + > +#ifdef CONFIG_X86_IOPORT > .macro FIXED_FRAME label,func > ENTRY(\label) > CFI_STARTPROC > @@ -856,10 +861,8 @@ ENTRY(\label) > END(\label) > .endm > > - FORK_LIKE clone > - FORK_LIKE fork &gt...

...pointer in the GDT */ > diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S > index 1b69951..eb4f5ba 100644 > --- a/arch/x86/kernel/entry_64.S > +++ b/arch/x86/kernel/entry_64.S > @@ -844,6 +844,11 @@ ENTRY(stub_\func) > END(stub_\func) > .endm > > + FORK_LIKE clone > + FORK_LIKE fork > + FORK_LIKE vfork > + > +#ifdef CONFIG_X86_IOPORT > .macro FIXED_FRAME label,func > ENTRY(\label) > CFI_STARTPROC > @@ -856,10 +861,8 @@ ENTRY(\label) > END(\label) > .endm > > - FORK_LIKE clone > - FORK_LIKE fork &gt...

The 32-bit and 64-bit versions of copy_thread have functionally identical handling for copying the I/O bitmap, modulo differences in error handling. Clean up the error paths in both by moving the copy of the I/O bitmap to the end, to eliminate the need to free it if subsequent copy steps fail; move the resulting identical code to a static inline in a common header. Signed-off-by: Josh Triplett

The 32-bit and 64-bit versions of copy_thread have functionally identical handling for copying the I/O bitmap, modulo differences in error handling. Clean up the error paths in both by moving the copy of the I/O bitmap to the end, to eliminate the need to free it if subsequent copy steps fail; move the resulting identical code to a static inline in a common header. Signed-off-by: Josh Triplett

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.