Title: Test to verify code fault handling in ISR execution context
and the behavior of irq_lock() and irq_unlock() when invoked
from User Mode. (ARM Only)
Description:
The first test verifies that we can handle system fault conditions
while running in handler mode (i.e. in an ISR). Only for ARM
Cortex-M targets.
The second test verifies that threads in user mode, despite being able to call
the irq_lock() and irq_unlock() functions without triggering a CPU fault,
they won't be able to read or modify the current IRQ locking status.
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Building and Running Project:
This project outputs to the console. It can be built and executed on QEMU as
follows:
ninja/make run
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Troubleshooting:
Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:
ninja/make clean # discard results of previous builds
# but keep existing configuration info
or
ninja/make pristine # discard results of previous builds
# and restore pre-defined configuration info
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Sample Output:
***** Booting Zephyr OS build zephyr-v2.0.0-1066-ga087055d4e3d *****
Running test suite arm_interrupt
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starting test - test_arm_interrupt
Available IRQ line: 25
E: ***** HARD FAULT *****
E: ARCH_EXCEPT with reason 3
E: r0/a1: 0x00000003 r1/a2: 0x20001240 r2/a3: 0x00000003
E: r3/a4: 0x20001098 r12/ip: 0x00000000 r14/lr: 0x000012c9
E: xpsr: 0x01000029
E: Faulting instruction address (r15/pc): 0x000003de
E: >>> ZEPHYR FATAL ERROR 3: Kernel oops
E: Current thread: 0x20000058 (unknown)
Caught system error -- reason 3
E: Fault during interrupt handling
E: ***** HARD FAULT *****
E: ARCH_EXCEPT with reason 4
E: r0/a1: 0x00000004 r1/a2: 0x20001240 r2/a3: 0x00000004
E: r3/a4: 0x20001098 r12/ip: 0x00000000 r14/lr: 0x000012c9
E: xpsr: 0x01000029
E: Faulting instruction address (r15/pc): 0x000003e8
E: >>> ZEPHYR FATAL ERROR 4: Kernel panic
E: Current thread: 0x20000058 (unknown)
Caught system error -- reason 4
E: Fault during interrupt handling
PASS - test_arm_interrupt
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starting test - test_arm_user_interrupt
PASS - test_arm_user_interrupt
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Test suite arm_interrupt succeeded
===================================================================
PROJECT EXECUTION SUCCESSFUL
Test suite arm_interrupt succeeded
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PROJECT EXECUTION SUCCESSFUL
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