1 # SPDX-License-Identifier: GPL-2.0
4 config TRACE_IRQFLAGS_SUPPORT
7 source "lib/Kconfig.debug"
9 config SH_STANDARD_BIOS
10 bool "Use LinuxSH standard BIOS"
13 Say Y here if your target has the gdb-sh-stub
14 package from www.m17n.org (or any conforming standard LinuxSH BIOS)
15 in FLASH or EPROM. The kernel will use standard BIOS calls during
16 boot for various housekeeping tasks (including calls to read and
17 write characters to a system console, get a MAC address from an
18 on-board Ethernet interface, and shut down the hardware). Note this
19 does not work with machines with an existing operating system in
20 mask ROM and no flash (WindowsCE machines fall in this category).
24 bool "Check for stack overflows"
25 depends on DEBUG_KERNEL && SUPERH32
27 This option will cause messages to be printed if free stack space
28 drops below a certain limit. Saying Y here will add overhead to
29 every function call and will therefore incur a major
30 performance hit. Most users should say N.
33 bool "Use 4Kb for kernel stacks instead of 8Kb"
34 depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
36 If you say Y here the kernel will use a 4Kb stacksize for the
37 kernel stack attached to each process/thread. This facilitates
38 running more threads on a system and also reduces the pressure
39 on the VM subsystem for higher order allocations. This option
40 will also use IRQ stacks to compensate for the reduced stackspace.
43 bool "Use separate kernel stacks when processing interrupts"
44 depends on DEBUG_KERNEL && SUPERH32 && BROKEN
46 If you say Y here the kernel will use separate kernel stacks
47 for handling hard and soft interrupts. This can help avoid
48 overflowing the process kernel stacks.
51 bool "Show disassembly of nearby code in register dumps"
52 depends on DEBUG_KERNEL && SUPERH32
53 default y if DEBUG_BUGVERBOSE
56 This prints out a code trace of the instructions leading up to
57 the faulting instruction as a debugging aid. As this does grow
58 the kernel in size a bit, most users will want to say N here.
60 Those looking for more verbose debugging output should say Y.
63 bool "Enable the DWARF unwinder for stacktraces"
68 Enabling this option will make stacktraces more accurate, at
69 the cost of an increase in overall kernel size.
72 bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
73 depends on DEBUG_KERNEL
76 If running in painfully slow environments, such as an RTL
77 simulation or from remote memory via SHdebug, where the memory
78 can already be guaranteed to ber zeroed on boot, say Y.
80 For all other cases, say N. If this option seems perplexing, or
81 you aren't sure, say N.
84 bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
90 depends on STACK_DEBUG || FUNCTION_TRACER