Frederic Weisbecker b2812d031d hw-breakpoints: Change/Enforce some breakpoints policies ... The current policies of breakpoints in x86 and SH are the following: - task bound breakpoints can only break on userspace addresses - cpu wide breakpoints can only break on kernel addresses The former rule prevents ptrace breakpoints to be set to trigger on kernel addresses, which is good. But as a side effect, we can't breakpoint on kernel addresses for task bound breakpoints. The latter rule simply makes no sense, there is no reason why we can't set breakpoints on userspace while performing cpu bound profiles. We want the following new policies: - task bound breakpoint can set userspace address breakpoints, with no particular privilege required. - task bound breakpoints can set kernelspace address breakpoints but must be privileged to do that. - cpu bound breakpoints can do what they want as they are privileged already. To implement these new policies, this patch checks if we are dealing with a kernel address breakpoint, if so and if the exclude_kernel parameter is set, we tell the user that the breakpoint is invalid, which makes a good generic ptrace protection. If we don't have exclude_kernel, ensure the user has the right privileges as kernel breakpoints are quite sensitive (risk of trap recursion attacks and global performance impacts). [ Paul Mundt: keep addr space check for sh signal delivery and fix double function declaration] Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Cc: K. Prasad <prasad@linux.vnet.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Paul Mundt <lethal@linux-sh.org>		2010-05-01 04:32:10 +02:00
..
uv	Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-02-28 11:00:55 -08:00
visws	x86: Move pci init function to x86_init	2010-02-19 16:12:29 -08:00
xen
a.out-core.h
a.out.h
acpi.h	ACPI: processor: finish unifying arch_acpi_processor_init_pdc()	2009-12-22 03:24:13 -05:00
aes.h
agp.h
alternative-asm.h
alternative.h	Merge branch 'perf-probes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-05 10:50:22 -08:00
amd_iommu_proto.h	x86/amd-iommu: Fix IOMMU-API initialization for iommu=pt	2010-01-22 17:44:35 +01:00
amd_iommu_types.h	x86/amd-iommu: warn when issuing command to uninitialized cmd buffer	2010-04-07 11:51:15 +02:00
amd_iommu.h
apb_timer.h	x86, apbt: Moorestown APB system timer driver	2010-02-24 11:01:21 -08:00
apic.h	x86, apic: Allow to use certain functions without APIC built-in support	2010-03-18 17:03:21 +01:00
apicdef.h
apm.h
asm-offsets.h
asm.h
atomic64_32.h	x86: Split atomic64_t functions into seperate headers	2010-01-07 11:47:31 -08:00
atomic64_64.h	x86: Split atomic64_t functions into seperate headers	2010-01-07 11:47:31 -08:00
atomic.h	x86: Mark atomic irq ops raw for 32bit legacy	2010-02-16 17:19:11 +01:00
auxvec.h
bios_ebda.h
bitops.h
bitsperlong.h
boot.h
bootparam.h
bug.h
bugs.h
byteorder.h
cache.h
cacheflush.h
calgary.h
calling.h
checksum_32.h
checksum_64.h
checksum.h
cmpxchg_32.h
cmpxchg_64.h
cmpxchg.h
compat.h	improve sys_newuname() for compat architectures	2010-03-12 15:52:32 -08:00
cpu.h
cpufeature.h	x86, cpu: Print AMD virtualization features in /proc/cpuinfo	2010-02-13 15:04:40 -08:00
cpumask.h
cputime.h
current.h
debugreg.h	x86/debug: Clear reserved bits of DR6 in do_debug()	2010-01-29 02:26:10 +01:00
delay.h
desc_defs.h
desc.h
device.h
div64.h
dma-mapping.h	dma-mapping: fix off-by-one error in dma_capable()	2009-12-16 07:20:12 -08:00
dma.h
dmi.h
dwarf2.h
e820.h	core: Move early_res from arch/x86 to kernel/	2010-02-16 21:43:39 -08:00
edac.h
efi.h
elf.h	x86: ELF_PLAT_INIT() shouldn't worry about TIF_IA32	2010-02-16 08:51:49 -08:00
emergency-restart.h
entry_arch.h
errno.h
fb.h	x86-64: Allow fbdev primary video code	2010-02-16 21:22:26 -08:00
fcntl.h
fixmap.h	x86: Fix placement of FIX_OHCI1394_BASE	2010-03-16 11:16:27 +01:00
floppy.h
frame.h
ftrace.h
futex.h
gart.h
genapic.h
geode.h	cs5535: drop the Geode-specific MFGPT/GPIO code	2009-12-15 08:53:28 -08:00
gpio.h
hardirq.h
highmem.h	x86, paravirt: Remove kmap_atomic_pte paravirt op.	2010-02-27 14:41:35 -08:00
hpet.h	x86: Disable HPET MSI on ATI SB700/SB800	2010-01-23 06:21:58 +01:00
hugetlb.h
hw_breakpoint.h	hw-breakpoints: Change/Enforce some breakpoints policies	2010-05-01 04:32:10 +02:00
hw_irq.h	x86: Handle legacy PIC interrupts on all the cpu's	2010-03-16 06:36:35 +01:00
hypertransport.h
hyperv.h	KVM: Add HYPER-V header file	2010-03-01 12:35:57 -03:00
hypervisor.h
i387.h	x86, ptrace: regset extensions to support xstate	2010-02-11 15:08:17 -08:00
i8253.h
i8259.h	Merge remote branch 'origin/x86/apic' into x86/mrst	2010-02-22 16:25:18 -08:00
ia32_unistd.h
ia32.h
idle.h
inat_types.h
inat.h
init.h
insn.h	x86: Move MAX_INSN_SIZE into asm/insn.h	2010-03-10 13:23:34 +01:00
inst.h
io_apic.h	x86, ioapic: Add dummy ioapic functions	2010-02-23 23:14:07 -08:00
io.h	x86: Merge io.h	2010-02-05 13:57:40 -08:00
ioctl.h
ioctls.h
iomap.h
iommu.h
ipcbuf.h
ipi.h
irq_regs.h
irq_remapping.h
irq_vectors.h	x86, irq: Use 0x20 for the IRQ_MOVE_CLEANUP_VECTOR instead of 0x1f	2010-01-18 10:59:59 -08:00
irq.h	x86, legacy_irq: Remove left over nr_legacy_irqs	2010-02-24 11:01:34 -08:00
irqflags.h
ist.h
k8.h
Kbuild	KVM: export <asm/hyperv.h>	2010-03-01 12:36:01 -03:00
kdebug.h
kexec.h
kgdb.h
kmap_types.h
kmemcheck.h
kprobes.h	x86: Move MAX_INSN_SIZE into asm/insn.h	2010-03-10 13:23:34 +01:00
kvm_emulate.h	KVM: x86 emulator: fix memory access during x86 emulation	2010-03-01 12:36:11 -03:00
kvm_host.h	KVM: Fix segment descriptor loading	2010-03-01 12:36:14 -03:00
kvm_para.h	KVM: Implement bare minimum of HYPER-V MSRs	2010-03-01 12:35:57 -03:00
kvm.h	KVM: x86: Extend KVM_SET_VCPU_EVENTS with selective updates	2009-12-27 13:36:33 -02:00
ldt.h
lguest_hcall.h	lguest: stop using KVM hypercall mechanism	2010-04-14 21:43:56 +09:30
lguest.h
linkage.h
local.h	local_t: Remove cpu_local_xx macros	2010-01-05 15:34:49 +09:00
mach_timer.h
mach_traps.h
math_emu.h
mc146818rtc.h
mca_dma.h
mca.h
mce.h	x86: mce.h: Fix warning in header checks	2010-01-13 10:41:22 +01:00
microcode.h	Revert "x86: ucode-amd: Load ucode-patches once ..."	2010-01-23 06:21:59 +01:00
mman.h
mmconfig.h
mmu_context.h
mmu.h
mmx.h
mmzone_32.h
mmzone_64.h	x86, numa: Add fixed node size option for numa emulation	2010-02-15 14:34:10 -08:00
mmzone.h
module.h
mpspec_def.h
mpspec.h
mrst.h	x86, mrst: Add vrtc platform data setup code	2010-02-23 23:15:19 -08:00
msgbuf.h
msidef.h
msr-index.h	Merge branch 'perf/urgent' into perf/core	2010-04-02 19:38:10 +02:00
msr.h	x86, msr: msrs_alloc/free for CONFIG_SMP=n	2009-12-16 15:36:32 -08:00
mtrr.h
mutex_32.h
mutex_64.h
mutex.h
nmi.h	x86, perfctr: Remove unused func avail_to_resrv_perfctr_nmi()	2009-12-28 09:36:46 +01:00
nops.h
numa_32.h
numa_64.h	x86, numa: Add fixed node size option for numa emulation	2010-02-15 14:34:10 -08:00
numa.h
numaq.h	Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-07 15:59:39 -08:00
olpc.h	x86, olpc: Use pci subarch init for OLPC	2010-02-25 19:26:23 -08:00
page_32_types.h
page_32.h
page_64_types.h
page_64.h
page_types.h	x86: Use the generic page_is_ram()	2010-02-01 16:58:17 -08:00
page.h
param.h
paravirt_types.h	x86, paravirt: Remove kmap_atomic_pte paravirt op.	2010-02-27 14:41:35 -08:00
paravirt.h	x86, paravirt: Remove kmap_atomic_pte paravirt op.	2010-02-27 14:41:35 -08:00
parport.h
pat.h
pci_64.h	x86: Only call dma32_reserve_bootmem 64bit !CONFIG_NUMA	2010-02-10 17:47:18 -08:00
pci_x86.h	Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-07 15:59:39 -08:00
pci-direct.h
pci-functions.h
pci.h	pci-dma: add linux/pci-dma.h to linux/pci.h	2010-03-12 15:52:42 -08:00
percpu.h	percpu, x86: Generic inc / dec percpu instructions	2010-01-05 15:34:50 +09:00
perf_event_p4.h	x86, perf: Add raw events support for the P4 PMU	2010-03-26 08:45:49 +01:00
perf_event.h	perf: Enhance perf to allow for guest statistic collection from host	2010-04-19 12:35:33 +03:00
pgalloc.h	x86, mm: Allow highmem user page tables to be disabled at boot time	2010-02-25 10:28:19 +01:00
pgtable_32_types.h
pgtable_32.h	x86: don't include slab.h from arch/x86/include/asm/pgtable_32.h	2010-03-30 22:02:21 +09:00
pgtable_64_types.h
pgtable_64.h	MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself	2010-02-20 16:41:46 +00:00
pgtable_types.h
pgtable-2level_types.h
pgtable-2level.h
pgtable-3level_types.h
pgtable-3level.h
pgtable.h
poll.h
posix_types_32.h
posix_types_64.h
posix_types.h
prctl.h
processor-cyrix.h
processor-flags.h
processor.h	x86, ptrace: Fix block-step	2010-03-26 11:33:57 +01:00
proto.h	Move round_up/down to kernel.h	2010-02-12 09:42:39 -08:00
ptrace-abi.h	x86, perf, bts, mm: Delete the never used BTS-ptrace code	2010-03-26 11:33:55 +01:00
ptrace.h	x86, perf, bts, mm: Delete the never used BTS-ptrace code	2010-03-26 11:33:55 +01:00
pvclock-abi.h
pvclock.h
rdc321x_defs.h
reboot_fixups.h
reboot.h
required-features.h
resource.h
resume-trace.h
rio.h
rtc.h
rwlock.h
rwsem.h	x86-64, rwsem: Avoid store forwarding hazard in __downgrade_write	2010-02-13 13:37:56 -08:00
scatterlist.h
seccomp_32.h
seccomp_64.h
seccomp.h
sections.h
segment.h
sembuf.h
serial.h
setup_arch.h
setup.h	x86: Move pci init function to x86_init	2010-02-19 16:12:29 -08:00
shmbuf.h
shmparam.h
sigcontext32.h
sigcontext.h
sigframe.h
siginfo.h
signal.h
smp.h	x86, lib: Add wbinvd smp helpers	2010-01-22 16:05:42 -08:00
smpboot_hooks.h
socket.h
sockios.h
sparsemem.h
spinlock_types.h
spinlock.h
srat.h
stackprotector.h
stacktrace.h	perf: Drop useless check for ignored frame	2010-01-13 10:09:08 +01:00
stat.h
statfs.h
string_32.h
string_64.h
string.h
suspend_32.h
suspend_64.h
suspend.h
svm.h	KVM: SVM: Fix SVM_CR0_SELECTIVE_MASK	2010-03-01 12:35:51 -03:00
swab.h
swiotlb.h
sync_bitops.h
sys_ia32.h	Add generic sys_olduname()	2010-03-12 15:52:32 -08:00
syscall.h	tracing: Unify arch_syscall_addr() implementations	2010-02-17 13:07:21 +01:00
syscalls.h	Add generic sys_olduname()	2010-03-12 15:52:32 -08:00
system_64.h
system.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2010-03-03 07:34:18 -08:00
tce.h
termbits.h
termios.h
thread_info.h	x86, ptrace: Fix block-step	2010-03-26 11:33:57 +01:00
time.h
timer.h
timex.h
tlb.h
tlbflush.h
topology.h
trampoline.h
traps.h
tsc.h
types.h
uaccess_32.h	x86: copy_from_user() should not return -EFAULT	2010-01-05 13:45:06 -08:00
uaccess_64.h	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-02-28 10:35:09 -08:00
uaccess.h
ucontext.h
unaligned.h
unistd_32.h	Add generic sys_olduname()	2010-03-12 15:52:32 -08:00
unistd_64.h	Add generic sys_olduname()	2010-03-12 15:52:32 -08:00
unistd.h
user32.h
user_32.h
user_64.h
user.h	x86, ptrace: regset extensions to support xstate	2010-02-11 15:08:17 -08:00
vdso.h
vga.h
vgtod.h
virtext.h
vm86.h
vmi_time.h
vmi.h
vmware.h
vmx.h	KVM: VMX: Rename VMX_EPT_IGMT_BIT to VMX_EPT_IPAT_BIT	2010-03-01 12:36:09 -03:00
vsyscall.h
x86_init.h	Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-07 15:59:39 -08:00
xcr.h
xor_32.h
xor_64.h
xor.h
xsave.h	x86, ptrace: regset extensions to support xstate	2010-02-11 15:08:17 -08:00