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authorStafford Horne <shorne@gmail.com>2017-07-24 21:44:35 +0900
committerStafford Horne <shorne@gmail.com>2017-11-03 14:01:15 +0900
commiteecac38b0423a69715073ecbde581dafd1abb28b (patch)
tree6c675e769ef8a5f0fb81b4ea2dd7596be9c5aebd /arch/openrisc/Kconfig
parent306e5e50a32140452849fff42fca104511fd6668 (diff)
downloadlwn-eecac38b0423a69715073ecbde581dafd1abb28b.tar.gz
lwn-eecac38b0423a69715073ecbde581dafd1abb28b.zip
openrisc: support framepointers and STACKTRACE_SUPPORT
For lockdep support a reliable stack trace mechanism is needed. This patch adds support in OpenRISC for the stacktrace framework, implemented by a simple unwinder api. The unwinder api supports both framepointer and basic stack tracing. The unwinder is now used to replace the stack_dump() implementation as well. The new traces are inline with other architectures trace format: Call trace: [<c0004448>] show_stack+0x3c/0x58 [<c031c940>] dump_stack+0xa8/0xe4 [<c0008104>] __cpu_up+0x64/0x130 [<c000d268>] bringup_cpu+0x3c/0x178 [<c000d038>] cpuhp_invoke_callback+0xa8/0x1fc [<c000d680>] cpuhp_up_callbacks+0x44/0x14c [<c000e400>] cpu_up+0x14c/0x1bc [<c041da60>] smp_init+0x104/0x15c [<c033843c>] ? kernel_init+0x0/0x140 [<c0415e04>] kernel_init_freeable+0xbc/0x25c [<c033843c>] ? kernel_init+0x0/0x140 [<c0338458>] kernel_init+0x1c/0x140 [<c003a174>] ? schedule_tail+0x18/0xa0 [<c0006b80>] ret_from_fork+0x1c/0x9c Signed-off-by: Stafford Horne <shorne@gmail.com>
Diffstat (limited to 'arch/openrisc/Kconfig')
-rw-r--r--arch/openrisc/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index bfff04ae7f7d..399f55e82dcb 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -33,6 +33,7 @@ config OPENRISC
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_USE_QUEUED_RWLOCKS
select OMPIC if SMP
+ select ARCH_WANT_FRAME_POINTERS
config CPU_BIG_ENDIAN
def_bool y
@@ -60,6 +61,9 @@ config TRACE_IRQFLAGS_SUPPORT
config GENERIC_CSUM
def_bool y
+config STACKTRACE_SUPPORT
+ def_bool y
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"