diff options
| author | Jens Wiklander <jens.wiklander@linaro.org> | 2015-12-06 11:01:54 +0100 |
|---|---|---|
| committer | Pascal Brand <pascal.brand@st.com> | 2016-02-10 06:38:36 +0100 |
| commit | 923c1f343db556196600a1788c437715083264f8 (patch) | |
| tree | a6573f73668c47c70bc94e6edf83e55b178772b7 /core/arch/arm/plat-ls | |
| parent | a1989c09670c506604b60b16d54281a633c5eb41 (diff) | |
core: stack unwinding
Adds support for stack unwinding, currently only done for fatal aborts
from kernel mode if CFG_CORE_UNWIND = y
The ARMv7/Aarch32 implementation uses -funwind-tables to generate frame
unwinding information which is quite large. Enabling stack unwinding
currently consumes ~8 KiB. The code to parse the frame unwind
information is imported from FreeBSD.
The Aarch64 implementation takes advantage of the frame pointer and has
minimal overhead. The core code to unwind the stack is imported from
FreeBSD.
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (HiKey 32/64)
Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Tested-by: Jens Wiklander <jens.wiklander@linaro.org> (QEMU, FVP)
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'core/arch/arm/plat-ls')
| -rw-r--r-- | core/arch/arm/plat-ls/ls_core_pos.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/core/arch/arm/plat-ls/ls_core_pos.S b/core/arch/arm/plat-ls/ls_core_pos.S index ae7fc4cc..21cfb4b2 100644 --- a/core/arch/arm/plat-ls/ls_core_pos.S +++ b/core/arch/arm/plat-ls/ls_core_pos.S @@ -28,11 +28,14 @@ #include <asm.S> #include <arm.h> #include <arm32_macros.S> +#include <kernel/unwind.h> /* Layerscape platform specific function to calculate core position. */ FUNC get_core_pos , : +UNWIND( .fnstart) read_mpidr r0 /* Calculate CorePos = CoreId */ and r0, r0, #MPIDR_CPU_MASK bx lr +UNWIND( .fnend) END_FUNC get_core_pos |