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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | menu "Kernel hacking" |
3 | ||
afbfb52e | 4 | config TRACE_IRQFLAGS_SUPPORT |
d7ef4fb3 | 5 | def_bool y |
afbfb52e | 6 | |
1da177e4 LT |
7 | source "lib/Kconfig.debug" |
8 | ||
9 | config SH_STANDARD_BIOS | |
10 | bool "Use LinuxSH standard BIOS" | |
1a013e2f | 11 | depends on SUPERH32 |
1da177e4 LT |
12 | help |
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). | |
21 | If unsure, say N. | |
22 | ||
9f14b84a | 23 | config STACK_DEBUG |
d153ea88 | 24 | bool "Check for stack overflows" |
5db141a9 | 25 | depends on DEBUG_KERNEL && SUPERH32 |
d153ea88 PM |
26 | help |
27 | This option will cause messages to be printed if free stack space | |
9f14b84a PM |
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. | |
d153ea88 | 31 | |
a6a31139 PM |
32 | config 4KSTACKS |
33 | bool "Use 4Kb for kernel stacks instead of 8Kb" | |
b817f7e0 | 34 | depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB |
a6a31139 PM |
35 | help |
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. | |
41 | ||
110ed282 PM |
42 | config IRQSTACKS |
43 | bool "Use separate kernel stacks when processing interrupts" | |
40c8bca7 | 44 | depends on DEBUG_KERNEL && SUPERH32 && BROKEN |
110ed282 PM |
45 | help |
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. | |
49 | ||
5d2685d0 PM |
50 | config DUMP_CODE |
51 | bool "Show disassembly of nearby code in register dumps" | |
52 | depends on DEBUG_KERNEL && SUPERH32 | |
53 | default y if DEBUG_BUGVERBOSE | |
54 | default n | |
55 | help | |
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. | |
59 | ||
60 | Those looking for more verbose debugging output should say Y. | |
61 | ||
bd353861 MF |
62 | config DWARF_UNWINDER |
63 | bool "Enable the DWARF unwinder for stacktraces" | |
64 | select FRAME_POINTER | |
da47f4a3 | 65 | depends on SUPERH32 |
bd353861 MF |
66 | default n |
67 | help | |
68 | Enabling this option will make stacktraces more accurate, at | |
69 | the cost of an increase in overall kernel size. | |
70 | ||
740a3e67 PM |
71 | config SH_NO_BSS_INIT |
72 | bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" | |
73 | depends on DEBUG_KERNEL | |
74 | default n | |
75 | help | |
76 | If running in painfully slow environments, such as an RTL | |
77 | simulation or from remote memory via SHdebug, where the memory | |
25985edc | 78 | can already be guaranteed to ber zeroed on boot, say Y. |
740a3e67 PM |
79 | |
80 | For all other cases, say N. If this option seems perplexing, or | |
81 | you aren't sure, say N. | |
82 | ||
8214d52a PM |
83 | config SH64_SR_WATCH |
84 | bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" | |
fe58cac3 | 85 | depends on SUPERH64 |
8214d52a | 86 | |
473d1cf4 PM |
87 | config MCOUNT |
88 | def_bool y | |
89 | depends on SUPERH32 | |
90 | depends on STACK_DEBUG || FUNCTION_TRACER | |
91 | ||
1da177e4 | 92 | endmenu |