zhangyu-duck opened a new pull request, #17938:
URL: https://github.com/apache/nuttx/pull/17938
## Summary
When an exception occurs, dump the necessary information, such as:
1. print trap type and reason
2. dump address and data register, include upcsa and lowcsa
3. dump special trap register
## Impact
enhance dumpinfo
## Testing
```c
int main(int argc, FAR char *argv[])
{
printf("Hello, World final!!\n");
int *p = NULL;
*p =4;
return 0;
}
```
dumpinfo:
nsh> hello
Hello, World final!!
tricore_internalprotrape: PANIC!!! Internal Protection Trap:
tricore_internalprotrape: Class 1 TID: 6 regs: 0x700322c0
tricore_internalprotrape: Internal Protection Reason:
tricore_internalprotrape: Memory Protection Null Address
dump_assert_info: Current Version: NuttX 12.12.0 6a048d2e87a Jan 15 2026
17:09:57 tricore
dump_assert_info: Assertion failed panic: at file: :0 task: hello process:
hello 0x80026df0
tricore_dump_lowcsa: LPCXI:00370C88 PC:80026DFE A2:00000000
A3:F0000600
tricore_dump_lowcsa: D0:00000000 D1:00000000 D2:00000015
D3:00000000
tricore_dump_lowcsa: A4:70001B54 A5:7000A744 A6:800034E6
A7:7000A760
tricore_dump_lowcsa: D4:7FFFFFFE D5:00000003 D6:00000000
D7:7FFFFFFF
tricore_dump_upcsa: UPCXI:00370C89 PSW:00000882 SP:7000A760
A11:80011566
tricore_dump_upcsa: D8:00000001 D9:70009F70 D10:00000000
D11:00000000
tricore_dump_upcsa: A12:80026DF0 A13:00000000 A14:00000000
A15:00000000
tricore_dump_upcsa: D12:00000000 D13:00000000 D14:00000000
D15:00000000
tricore_dump_trapctrl: PSTR:00000000 DSTR:00080000 DATR:00000000
DEADD:00000000
and we know reason is "Memory Protection Null Address" and after disassembly
we know pc: 80026DFE, which pointed to the correct exception instruction, and
visit A2, which value is 0, indicates that a null pointer was indeed accessed.
80026df0 <hello_main>:
80026df0: 91 00 00 48 movh.a %a4,32768
80026df4: d9 44 51 33 lea %a4,[%a4]13521 <800034d1 <__thenan_df+0xa29>>
80026df8: 6d 00 21 51 call 8003103a <printf>
80026dfc: a0 02 mov.a %a2,0
80026dfe: f4 22 st.a [%a2],%a2
80026e00: 6d ff 4d 55 call 8001189a <abort>
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