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src/rtos/rtos_nuttx_stackings.c: Fix stack alignment for cortex-m targets

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Backtraces performed by GDB on any thread other than the current
thread would fail if hardware 8 byte ISR stack alignment
was enabled on cortex_m targets. Stack reads now adjust
the stored SP to account for a potential offset introduced by hardware.
Fixed incorrect register offsets for cortex_m Nuttx frames by reading
the TCB info symbols to determine correct offsets.
Fixed offsets can no longer be used since the offsets have changed
multiple times for different Nuttx versions.
Tested on nuttx-12.1.0.
Tested using custom stm32h7 board and custom s32k148 board variants.
Built with CONFIG_ARCH_FPU enabled and disabled to
test FPU and non FPU frame logic.

Change-Id: Ifcbeefb0ddcfbcb528daa9d1d95732ca9584c9ef
Signed-off-by: daniellizewski <daniellizewski@geotab.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8180
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
This commit is contained in:
daniellizewski
2024-03-21 09:58:34 -04:00
committed by Antonio Borneo
parent b14f63e004
commit 5159c59915
3 changed files with 104 additions and 93 deletions
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9
src/rtos/rtos_nuttx_stackings.h
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@@ -5,6 +5,15 @@
#include "rtos.h"
/* Used to index the list of retrieved symbols. See nuttx_symbol_list for the order. */
enum nuttx_symbol_vals {
NX_SYM_READYTORUN = 0,
NX_SYM_PIDHASH,
NX_SYM_NPIDHASH,
NX_SYM_TCB_INFO,
NX_SYM_REG_OFFSETS,
};
extern const struct rtos_register_stacking nuttx_stacking_cortex_m;
extern const struct rtos_register_stacking nuttx_stacking_cortex_m_fpu;
extern const struct rtos_register_stacking nuttx_riscv_stacking;