$ JLinkGDBServer -singlerun -timeout 0 -nogui -rtos /nuttx/tools/jlink-nuttx.so
SEGGER J-Link GDB Server V7.50 Command Line Version

JLinkARM.dll V7.50 (DLL compiled Jul  1 2021 17:41:45)

Command line: -singlerun -timeout 0 -nogui -rtos /nuttx/tools/jlink-nuttx.so
-----GDB Server start settings-----
GDBInit file:                  none
GDB Server Listening port:     2331
SWO raw output listening port: 2332
Terminal I/O port:             2333
Accept remote connection:      yes
Generate logfile:              off
Verify download:               off
Init regs on start:            off
Silent mode:                   off
Single run mode:               on
Target connection timeout:     0 ms
------J-Link related settings------
J-Link Host interface:         USB
J-Link script:                 none
J-Link settings file:          none
------Target related settings------
Target device:                 Unspecified
Target interface:              JTAG
Target interface speed:        4000kHz
Target endian:                 little

Connecting to J-Link...
J-Link is connected.
Firmware: J-Link V10 compiled Nov  2 2021 12:14:50
Hardware: V10.10
S/N: 260115523
OEM: SEGGER-EDU
Feature(s): FlashBP, GDB
Checking target voltage...
Target voltage: 2.98 V
Listening on TCP/IP port 2331
Connecting to target...

J-Link found 2 JTAG devices, Total IRLen = 9
JTAG ID: 0x4BA00477 (Cortex-M4)
Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
Reading all registers
Read 4 bytes @ address 0x1FFFFDFA (Data = 0xFFFFFFFF)
Read 2 bytes @ address 0x1FFFFDFA (Data = 0xFFFF)
Received monitor command: speed 1000
Target interface speed set to 1000 kHz
Received monitor command: clrbp
Received monitor command: reset
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0x0000026A)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= 10010000, MSP= 10010000, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = 0000026A
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00

Security extension regs:
MSP_S  = 00000000, MSPLIM_S  = 00000000
PSP_S  = 00000000, PSPLIM_S  = 00000000
MSP_NS = 10010000, MSPLIM_NS = 00000000
PSP_NS = 00000000, PSPLIM_NS = 00000000
CONTROL_S  00, FAULTMASK_S  00, BASEPRI_S  00, PRIMASK_S  00
CONTROL_NS 00, FAULTMASK_NS 00, BASEPRI_NS 00, PRIMASK_NS 00

Reading all registers
Received monitor command: speed auto
Select auto target interface speed (4000 kHz)
Received monitor command: flash breakpoints 1
Flash breakpoints enabled
Received monitor command: semihosting enable
Semi-hosting enabled (Handle on BKPT)
Received monitor command: semihosting IOClient 1
Semihosting I/O set to TELNET Client
Received monitor command: SWO DisableTarget 0xFFFFFFFF
Failed to disable SWO.
Received monitor command: SWO EnableTarget 0 0 0x1 0
Failed to enable SWO. Could not determine a suitable SWO speed!
Loading RTOS plugin: //nuttx/tools/jlink-nuttx.so...
RTOS plugin (API v1.1) loaded successfully
RTOS plugin: Loaded
Received symbol: g_pidhash (0x20001134)
Received symbol: g_npidhash (0x20001138)
Received symbol: g_tcbinfo (0x0009DDEC)
Received symbol: g_readytorun (0x20001104)
All mandatory symbols successfully loaded.
All mandatory symbols successfully loaded.
Downloading 16096 bytes @ address 0x00000000
Downloading 16320 bytes @ address 0x00003EE0
Downloading 352 bytes @ address 0x00007EA0
Downloading 16368 bytes @ address 0x00008000
Downloading 16 bytes @ address 0x0000BFF0
Downloading 412 bytes @ address 0x0000C000
Downloading 256 bytes @ address 0x0000C200
Downloading 16080 bytes @ address 0x0000C300
Downloading 16128 bytes @ address 0x000101D0
Downloading 16112 bytes @ address 0x000140D0
Downloading 16112 bytes @ address 0x00017FC0
Downloading 16112 bytes @ address 0x0001BEB0
Downloading 16112 bytes @ address 0x0001FDA0
Downloading 16144 bytes @ address 0x00023C90
Downloading 16064 bytes @ address 0x00027BA0
Downloading 16032 bytes @ address 0x0002BA60
Downloading 16112 bytes @ address 0x0002F900
Downloading 16192 bytes @ address 0x000337F0
Downloading 16176 bytes @ address 0x00037730
Downloading 16176 bytes @ address 0x0003B660
Downloading 16160 bytes @ address 0x0003F590
Downloading 16112 bytes @ address 0x000434B0
Downloading 16080 bytes @ address 0x000473A0
Downloading 15936 bytes @ address 0x0004B270
Downloading 16160 bytes @ address 0x0004F0B0
Downloading 16064 bytes @ address 0x00052FD0
Downloading 16016 bytes @ address 0x00056E90
Downloading 16080 bytes @ address 0x0005AD20
Downloading 16128 bytes @ address 0x0005EBF0
Downloading 16000 bytes @ address 0x00062AF0
Downloading 15968 bytes @ address 0x00066970
Downloading 16032 bytes @ address 0x0006A7D0
Downloading 16160 bytes @ address 0x0006E670
Downloading 15984 bytes @ address 0x00072590
Downloading 16064 bytes @ address 0x00076400
Downloading 16144 bytes @ address 0x0007A2C0
Downloading 16336 bytes @ address 0x0007E1D0
Downloading 16320 bytes @ address 0x000821A0
Downloading 16336 bytes @ address 0x00086160
Downloading 16320 bytes @ address 0x0008A130
Downloading 16352 bytes @ address 0x0008E0F0
Downloading 16336 bytes @ address 0x000920D0
Downloading 16336 bytes @ address 0x000960A0
Downloading 16058 bytes @ address 0x0009A070
Downloading 8 bytes @ address 0x0009DF2C
Downloading 3100 bytes @ address 0x0009DF34
Segmentation fault (core dumped)