select OF
select OF_EARLY_FLATTREE
select PERF_USE_VMALLOC
+ select HAVE_DEBUG_STACKOVERFLOW
config SCHED_OMIT_FRAME_POINTER
def_bool y
with klogd/syslogd or the X server. You should normally N here,
unless you want to debug such a crash.
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
config 16KSTACKS
bool "Use 16Kb for kernel stacks instead of 8Kb"
help
select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select HAVE_DEBUG_STACKOVERFLOW
config GENERIC_CSUM
def_bool y
source "lib/Kconfig.debug"
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
config DEBUG_VERBOSE
bool "Verbose fault messages"
default y
select ARCH_WANT_IPC_PARSE_VERSION
select OLD_SIGSUSPEND3
select OLD_SIGACTION
+ select HAVE_DEBUG_STACKOVERFLOW
config ZONE_DMA
bool
source "lib/Kconfig.debug"
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
-
config GDBSTUB
bool "Remote GDB kernel debugging"
depends on DEBUG_KERNEL
select GENERIC_ATOMIC64
select ARCH_USES_GETTIMEOFFSET
select MODULES_USE_ELF_RELA
+ select HAVE_DEBUG_STACKOVERFLOW
config SBUS
bool
source "lib/Kconfig.debug"
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
config DEBUG_PAGEALLOC
bool "Debug page memory allocations"
depends on DEBUG_KERNEL && BROKEN
select OF
select OF_EARLY_FLATTREE
select SPARSE_IRQ
+ select HAVE_DEBUG_STACKOVERFLOW
config STACKTRACE_SUPPORT
def_bool y
source "lib/Kconfig.debug"
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
config 4KSTACKS
bool "Use 4Kb for kernel stacks instead of 8Kb"
depends on DEBUG_KERNEL
select MODULES_USE_ELF_REL if MODULES
select MODULES_USE_ELF_RELA if MODULES && 64BIT
select CLONE_BACKWARDS
+ select HAVE_DEBUG_STACKOVERFLOW
menu "Machine selection"
Normally, you will choose 'N' here.
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit(2GB on MIPS). The debugging option
- provides another way to check stack overflow happened on kernel mode
- stack usually caused by nested interruption.
-
config SMTC_IDLE_HOOK_DEBUG
bool "Enable additional debug checks before going into CPU idle loop"
depends on DEBUG_KERNEL && MIPS_MT_SMTC
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
select OLD_SIGACTION
+ select HAVE_DEBUG_STACKOVERFLOW
config AM33_2
def_bool n
source "lib/Kconfig.debug"
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
-
config DEBUG_DECOMPRESS_KERNEL
bool "Using serial port during decompressing kernel"
depends on DEBUG_KERNEL
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
+ select HAVE_DEBUG_STACKOVERFLOW
config MMU
def_bool y
menu "Debugging options"
-config DEBUG_STACKOVERFLOW
- bool "Check for kernel stack overflow"
- default y
- help
- Make extra checks for space available on stack in some
- critical functions. This will cause kernel to run a bit slower,
- but will catch most of kernel stack overruns and exit gracefully.
-
- Say Y if you are unsure.
-
config JUMP_UPON_UNHANDLED_EXCEPTION
bool "Try to die gracefully"
default y
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS
select TTY # Needed for pdc_cons.c
+ select HAVE_DEBUG_STACKOVERFLOW
help
The PA-RISC microprocessor is designed by Hewlett-Packard and used
If in doubt, say "N".
endmenu
-
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- default y
- depends on DEBUG_KERNEL
- ---help---
- Say Y here if you want to check the overflows of kernel, IRQ
- and exception stacks. This option will cause messages of the
- stacks in detail when free stack space drops below a certain
- limit.
- If in doubt, say "N".
select ARCH_USE_BUILTIN_BSWAP
select OLD_SIGSUSPEND
select OLD_SIGACTION if PPC32
+ select HAVE_DEBUG_STACKOVERFLOW
config EARLY_PRINTK
bool
too small and stack traces cause important information to
scroll off the screen.
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
config HCALL_STATS
bool "Hypervisor call instrumentation"
depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
select HAVE_ARCH_TRACEHOOK
select HAVE_SYSCALL_TRACEPOINTS
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+ select HAVE_DEBUG_STACKOVERFLOW
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
with klogd/syslogd. You should normally N here,
unless you want to debug such a crash.
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- help
- This option will cause messages to be printed if free stack space
- drops below a certain limit.
-
config DEBUG_EXTRA_FLAGS
string "Additional compiler arguments when building with '-g'"
depends on DEBUG_INFO
select OLD_SIGACTION if X86_32
select COMPAT_OLD_SIGACTION if IA32_EMULATION
select RTC_LIB
+ select HAVE_DEBUG_STACKOVERFLOW
config INSTRUCTION_DECODER
def_bool y
with klogd/syslogd or the X server. You should normally N here,
unless you want to debug such a crash. You need usb debug device.
-config DEBUG_STACKOVERFLOW
- bool "Check for stack overflows"
- depends on DEBUG_KERNEL
- ---help---
- Say Y here if you want to check the overflows of kernel, IRQ
- and exception stacks. This option will cause messages of the
- stacks in detail when free stack space drops below a certain
- limit.
- If in doubt, say "N".
-
config X86_PTDUMP
bool "Export kernel pagetable layout to userspace via debugfs"
depends on DEBUG_KERNEL
If unsure, say N.
+config HAVE_DEBUG_STACKOVERFLOW
+ bool
+
+config DEBUG_STACKOVERFLOW
+ bool "Check for stack overflows"
+ depends on DEBUG_KERNEL && HAVE_DEBUG_STACKOVERFLOW
+ ---help---
+ Say Y here if you want to check for overflows of kernel, IRQ
+ and exception stacks (if your archicture uses them). This
+ option will show detailed messages if free stack space drops
+ below a certain limit.
+
+ These kinds of bugs usually occur when call-chains in the
+ kernel get too deep, especially when interrupts are
+ involved.
+
+ Use this in cases where you see apparently random memory
+ corruption, especially if it appears in 'struct thread_info'
+
+ If in doubt, say "N".
+
source "samples/Kconfig"
source "lib/Kconfig.kgdb"
projects / linux-imx.git / commitdiff