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 test also verifies the behavior of the
spurious interrupt handler, as well as the ARM spurious exception
handler.
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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