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linux/arch/mips/kernel
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Maneesh Soni 6457a396bb MIPS Kprobes: Support branch instructions probing 
This patch provides support for kprobes on branch instructions. The branch
instruction at the probed address is actually emulated and not executed
out-of-line like other normal instructions. Instead the delay-slot instruction
is copied and single stepped out of line.

At the time of probe hit, the original branch instruction is evaluated
and the target cp0_epc is computed similar to compute_retrun_epc(). It
is also checked if the delay slot instruction can be skipped, which is
true if there is a NOP in delay slot or branch is taken in case of
branch likely instructions. Once the delay slot instruction is single
stepped the normal execution resume with the cp0_epc updated the earlier
computed cp0_epc as per the branch instructions.

Signed-off-by: Maneesh Soni <manesoni@cisco.com>
Signed-off-by: Victor Kamensky <kamensky@cisco.com>
Cc: David Daney <david.daney@cavium.com>
Cc: ananth@in.ibm.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2914/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-12-07 22:04:03 +00:00
..
cpufreq
MIPS: errloongson2_clock: Fix build error by including linux/module.h
2011-11-10 17:59:45 +00:00
.gitignore
…
8250-platform.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
asm-offsets.c
MIPS: Remove unused task_struct.trap_no field.
2010-08-05 13:26:30 +01:00
binfmt_elfn32.c
…
binfmt_elfo32.c
MIPS: 64-bit: Fix o32 core dump
2009-07-03 15:45:27 +01:00
branch.c
MIPS Kprobes: Refactor branch emulation
2011-12-07 22:04:03 +00:00
cevt-bcm1480.c
MIPS: Add missing #inclusions of <linux/irq.h>
2010-10-07 14:08:54 +01:00
cevt-ds1287.c
MIPS: Add missing #inclusions of <linux/irq.h>
2010-10-07 14:08:54 +01:00
cevt-gt641xx.c
MIPS: Add missing #inclusions of <linux/irq.h>
2010-10-07 14:08:54 +01:00
cevt-r4k.c
MIPS: Kernel hangs occasionally during boot.
2011-11-08 17:59:22 +00:00
cevt-sb1250.c
MIPS: Add missing #inclusions of <linux/irq.h>
2010-10-07 14:08:54 +01:00
cevt-smtc.c
MIPS: Add missing #inclusions of <linux/irq.h>
2010-10-07 14:08:54 +01:00
cevt-txx9.c
mips: convert to clocksource_register_hz/khz
2011-02-21 13:33:50 -08:00
cpu-bugs64.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
cpu-probe.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
csrc-bcm1480.c
mips: convert to clocksource_register_hz/khz
2011-02-21 13:33:50 -08:00
csrc-ioasic.c
mips: convert to clocksource_register_hz/khz
2011-02-21 13:33:50 -08:00
csrc-powertv.c
mips: convert to clocksource_register_hz/khz
2011-02-21 13:33:50 -08:00
csrc-r4k.c
mips: convert to clocksource_register_hz/khz
2011-02-21 13:33:50 -08:00
csrc-sb1250.c
mips: convert to clocksource_register_hz/khz
2011-02-21 13:33:50 -08:00
early_printk.c
…
entry.S
MIPS: Split do_syscall_trace into two functions.
2011-05-19 09:55:44 +01:00
ftrace.c
MIPS: Ftrace: Fix the CONFIG_DYNAMIC_FTRACE=n compile
2011-09-21 17:52:04 +02:00
genex.S
MIPS: Read watch registers with interrupts disabled.
2009-01-30 21:32:58 +00:00
gpio_txx9.c
…
head.S
MIPS: Avoid potential hazard on Context register
2009-11-02 12:00:07 +01:00
i8253.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
i8259.c
MIPS: i8259: Mark cascade interrupt non-threaded
2011-09-21 17:52:28 +02:00
init_task.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
irq_cpu.c
MIPS: Install handlers for software IRQs
2011-07-25 17:26:54 +01:00
irq_txx9.c
MIPS: Convert the irq functions to the new names
2011-03-29 14:48:07 +02:00
irq-gic.c
MIPS: Convert the irq functions to the new names
2011-03-29 14:48:07 +02:00
irq-gt641xx.c
MIPS: Convert the irq functions to the new names
2011-03-29 14:48:07 +02:00
irq-msc01.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
irq-rm7000.c
MIPS: Convert the irq functions to the new names
2011-03-29 14:48:07 +02:00
irq-rm9000.c
MIPS: Convert the irq functions to the new names
2011-03-29 14:48:07 +02:00
irq.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
jump_label.c
MIPS: jump label: Add MIPS support.
2011-01-18 19:30:24 +01:00
kgdb.c
MIPS: Fix a typo.
2010-10-04 18:33:54 +01:00
kprobes.c
MIPS Kprobes: Support branch instructions probing
2011-12-07 22:04:03 +00:00
kspd.c
MIPS: kspd: Adjust confusing if indentation
2010-10-04 18:33:54 +01:00
linux32.c
MIPS: Compat: Use 32-bit wrapper for compat_sys_futex.
2011-09-21 17:53:44 +02:00
machine_kexec.c
…
Makefile
MIPS: perf: Reorganize contents of perf support files.
2011-10-24 23:34:26 +01:00
mcount.S
MIPS: tracing: Fix the indentation of mcount.S
2010-08-05 13:26:06 +01:00
mips_ksyms.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
mips_machine.c
MIPS: Add generic support for multiple machines within a single kernel
2011-01-18 19:30:21 +01:00
mips-mt-fpaff.c
MIPS: MT: Fix build error iFPU affinity code
2010-10-25 08:12:27 -07:00
mips-mt.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
module.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
octeon_switch.S
update David Miller's old email address
2011-04-06 06:19:38 -07:00
perf_event_mipsxx.c
MIPS: perf: Add Octeon support for hardware perf.
2011-10-24 23:34:27 +01:00
perf_event.c
MIPS: perf: Reorganize contents of perf support files.
2011-10-24 23:34:26 +01:00
proc.c
MIPS: Probe for presence of KScratch registers.
2011-01-18 19:30:22 +01:00
process.c
mips: add export.h to files using EXPORT_SYMBOL/THIS_MODULE
2011-10-31 19:30:57 -04:00
prom.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
ptrace32.c
headers: smp_lock.h redux
2009-07-12 12:22:34 -07:00
ptrace.c
MIPS: Split do_syscall_trace into two functions.
2011-05-19 09:55:44 +01:00
r4k_fpu.S
update David Miller's old email address
2011-04-06 06:19:38 -07:00
r4k_switch.S
update David Miller's old email address
2011-04-06 06:19:38 -07:00
r2300_fpu.S
update David Miller's old email address
2011-04-06 06:19:38 -07:00
r2300_switch.S
update David Miller's old email address
2011-04-06 06:19:38 -07:00
r6000_fpu.S
update David Miller's old email address
2011-04-06 06:19:38 -07:00
relocate_kernel.S
…
reset.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
rtlx.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
scall32-o32.S
MIPS: Hook up process_vm_readv and process_vm_writev system calls.
2011-11-09 00:07:56 +00:00
scall64-64.S
MIPS: Hook up process_vm_readv and process_vm_writev system calls.
2011-11-09 00:07:56 +00:00
scall64-n32.S
MIPS: Hook up process_vm_readv and process_vm_writev system calls.
2011-11-09 00:07:56 +00:00
scall64-o32.S
MIPS: Hook up process_vm_readv and process_vm_writev system calls.
2011-11-09 00:07:56 +00:00
setup.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
signal32.c
MIPS: Fix GCC-4.6 'set but not used' warning in signal*.c
2011-03-14 21:07:25 +01:00
signal_n32.c
MIPS: do_sigaltstack() expects userland pointers
2010-10-18 16:59:03 +01:00
signal-common.h
MIPS: Move signal trampolines off of the stack.
2010-04-12 17:26:15 +01:00
signal.c
MIPS: Handle __put_user() sleeping.
2011-09-21 17:52:38 +02:00
smp-cmp.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
smp-mt.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
smp-up.c
cpumask: arch_send_call_function_ipi_mask: mips
2009-09-24 09:34:45 +09:30
smp.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
smtc-asm.S
…
smtc-proc.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
smtc.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
spinlock_test.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
spram.c
MIPS: SPRAM: Clean up support code a little
2009-11-02 12:00:05 +01:00
stacktrace.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
sync-r4k.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
syscall.c
MIPS: Move arch_get_unmapped_area and gang to new file.
2011-05-19 09:55:49 +01:00
time.c
mips: migrate core kernel file from module.h --> export.h
2011-10-31 19:30:56 -04:00
topology.c
MIPS: Add arch generic CPU hotplug
2009-06-24 18:34:40 +01:00
traps.c
MIPS: ASID conflict after CPU hotplug
2011-11-10 17:59:45 +00:00
unaligned.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
vdso.c
MIPS: Make init_vdso a subsys_initcall.
2010-07-26 19:08:16 +01:00
vmlinux.lds.S
Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2011-05-24 11:53:42 -07:00
vpe.c
mips: remove needless include of module.h from core kernel files.
2011-10-31 19:30:57 -04:00
watch.c
…