Python XSDB Usage Examples - 2023.2 English

Vitis Unified Software Platform Documentation: Embedded Software Development (UG1400)

Document ID
UG1400
Release Date
2023-12-13
Version
2023.2 English

Debug Operations on Session Object

In this mode, you can create a session object and run debug operations on different debug targets using the same session object.

session=start_debug_session()
session.connect(url="TCP:xhdbfarmrkd11:3121")
session.targets(3)
# All subsequent commands are run on target 3, until the target is changed with targets() function
session.dow("test.elf")
session.bpadd(addr='main')
session.con()
session.targets(4)
# All subsequent commands are run on target 4
session.dow("foo.elf")
session.bpadd(addr='foo')
session.con()

Debug Operations on Target Object

You can also use the Target object returned by targets() functions and run debug operations can be performed on these objects. The following is an example:

session = start_debug_session()
session.connect(url="TCP:xhdbfarmrkd11:3121")
ta3 = session.targets(3)
ta4 = session.targets(4)
# Run debug commands using target objects
ta3.dow("test.elf")
ta4.dow("foo.elf")
bp1 = ta3.bpadd(addr='main')
bp2 = ta4.bpadd(addr='foo')
ta3.con()
ta4.con()
...
bp1.status()
bp2.status()

For interactive usage, it is recommended to use commands and options instead of functions and arguments, as functions require a lot of extra typing. You have defined an interactive() function in xsdb module, which supports the commands. The following is an example:

Vitis-ng [1]: import xsdb
Vitis-ng [2]: xsdb.interactive()
% conn -host xhdbfarmrkb9
tcfchan#0
% ta
1 APU 
    2 ARM Cortex-A9 MPCore #0 (Running) 
    3 ARM Cortex-A9 MPCore #1 (Running)
4 xc7z020
% ta 2
<xsdpy._target.Target object at 0x7fb2652d3520>
% stop
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0xffffff28 (Suspended)
% q
Vitis-ng [3]:

Programming U-Boot over JTAG

s = xsdb.start_debug_session()
# connecting to the target
s.connect(url="TCP:xhdbfarmrkg7:3121")
# Disable Security gates to view PMU MB target
s.targets("--set", filter="name =~ PSU")
# By default, JTAG security gates are enabled
# This disables security gates for DAP, PLTAP and PMU.
s.mwr(0xffca0038, words=0x1ff)
time.sleep(0.5)
# Load and run PMU FW
s.targets("--set", filter="name =~ MicroBlaze PMU")
s.dow('pmufw.elf')
s.con()
time.sleep(0.5)
# Reset A53, load and run FSBL
s.targets("--set", filter="name =~ Cortex-A53 #0")
s.targets()
s.rst(type='processor')
s.dow('fsbl.elf')
s.con()
# Give FSBL time to run
time.sleep(5)
s.stop()
# Downloading the other Softwares like u-boot..etc using below command
s.dow('system.dtb', '-d', addr=0x100000)
s.dow('u-boot.elf')
s.dow('bl31.elf')
s.con()
time.sleep(5)
s.stop()

Generate SVF files

# Reset values of respective cores
core = 0
apu_reset_a53 = [0x380e, 0x340d, 0x2c0b, 0x1c07]
# Generate SVF file for linking DAP to the JTAG chain
# Next 2 steps are required only for Rev2.0 silicon and above.
s = xsdb.start_debug_session()
s.connect(url="TCP:xhdxxxx41x:3121")
svf = s.svf()
svf.config('--linkdap', scan_chain=[0x14738093, 12, 0x5ba00477, 4],
           device_index=1, out="dapcon.svf")
svf.generate()

svf = s.svf()
# Configure the SVF generation
svf.config(scan_chain=[0x14738093, 12, 0x5ba00477, 4],
           device_index=1, cpu_index=core, delay=10, out="fsbl_hello.svf")
# Record writing of bootloop and release of A53 core from reset
svf.mwr(0xffff0000, 0x14000000)
svf.mwr(0xfd1a0104, apu_reset_a53[core])
# Record stopping the core
svf.stop()
# Record downloading FSBL
svf.dow(file='zynq_fsbl.elf')
# Record executing FSBL
svf.con()
svf.delay(100000)
# Record some delay and then stopping the core
svf.stop()
# Record downloading the application
svf.dow(file='zynq_hello.elf')
# Record executing application
svf.con()
# Generate SVF
svf.generate()

Using readjtaguart function

s = xsdb.start_debug_session()
# connecting to the target
s.connect(url="TCP:xhdbfarmrke9:3121")
# List available targets and select a target through its id.
# The targets are assigned IDs as they are discovered on the Jtag chain,
# so the IDs can change from session to session.
# For non-interactive usage, -filter option can be used to select a target,
# instead of selecting the target through its ID
s.targets("--set", filter="name =~ ARM Cortex-A9 MPCore #0")
s.targets()
s.rst()
s.loadhw(hw='zc702.xsa')
# run FSBL for ps7_init
s.dow('fsbl.elf')
s.con()
time.sleep(0.5)
s.stop()
# Download the application program
s.dow('test_jtag_uart.elf')
s.readjtaguart()
s.con()
s.readjtaguart('--stop')  # after you are done

Using readjtaguart_file function

s = xsdb.start_debug_session()
# connecting to the target
s.connect(url="TCP:xhdbfarmrke9:3121")
# List available targets and select a target through its id.
# The targets are assigned IDs as they are discovered on the Jtag chain,
# so the IDs can change from session to session.
# For non-interactive usage, -filter option can be used to select a target,
# instead of selecting the target through its ID
s.targets("--set", filter="name =~ ARM Cortex-A9 MPCore #0")
s.targets()
s.rst()
s.loadhw(hw='zc702.xsa')
# run FSBL for ps7_init
s.dow('fsbl.elf')
s.con()
time.sleep(0.5)
s.stop()
# Download the application program
s.dow('test_jtag_uart.elf')
s.readjtaguart(file='streams.log', mode='w')
s.con()
s.readjtaguart('--stop')  # after you are done

Using jtag_terminal function

s = xsdb.start_debug_session()
# connecting to the target
s.connect(url="TCP:xhdbfarmrke9:3121")
# List available targets and select a target through its id.
# The targets are assigned IDs as they are discovered on the Jtag chain,
# so the IDs can change from session to session.
# For non-interactive usage, -filter option can be used to select a target,
# instead of selecting the target through its ID
s.targets("--set", filter="name =~ ARM Cortex-A9 MPCore #0")
s.targets()
s.rst()
s.loadhw(hw='zc702.xsa')
# run FSBL for ps7_init
s.dow('fsbl.elf')
s.con()
time.sleep(0.5)
s.stop()
# Download the application program
s.dow('test_jtag_uart.elf')
s.jtagterminal()
s.con()
s.jtagterminal('--stop')  # after you are done

Performing_standalone_app_debug:

Vitis [2]: import xsdb

Vitis [3]: s = xsdb.start_debug_session()

# connecting to the target
Vitis [4]: s.connect(url="TCP:xhdbfarmrke9:3121")
tcfchan#0
Out[4]: 'tcfchan#0'

# List available targets and select a target through its id.
# The targets are assigned IDs as they are discovered on the Jtag chain,
# so the IDs can change from session to session.
# For non-interactive usage, -filter option can be used to select a target,
# instead of selecting the target through its ID
Vitis [5]: s.targets()
     1  APU
        2  ARM Cortex-A9 MPCore #0 (Running)
        3  ARM Cortex-A9 MPCore #1 (Running)
     4  xc7z020

Vitis [6]: s.targets("--set", filter="name =~ APU")
Out[6]: <xsdb._target.Target at 0x7f01764c6e20>

Vitis [7]: s.targets()
     1* APU
        2  ARM Cortex-A9 MPCore #0 (Running)
        3  ARM Cortex-A9 MPCore #1 (Running)
     4  xc7z020

Vitis [8]: s.rst()

Vitis [9]: s.fpga(file='zc702.bit')
100%    3.86MB    1.66MB/s    00:02ETA


Vitis [10]: s.targets(2)
Out[10]: <xsdb._target.Target at 0x7f014d1f1610>

Vitis [11]: s.loadhw(hw='zc702.xsa')
INFO: [Hsi 55-2053] elapsed time for repository (/proj/xbuilds/HEAD_daily_latest/installs/lin64/Vitis/HEAD/data/embeddedsw) loading 1 seconds

# run FSBL for ps_init
Vitis [12]: s.dow('fsbl.elf')
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0xffffff28 (Suspended)
Downloading Program -- fsbl.elf
    section, .text: 0x00000000 - 0x0000fc8b
    section, .handoff: 0x0000fc8c - 0x0000fcd7
    section, .init: 0x0000fcd8 - 0x0000fce3
    section, .fini: 0x0000fce4 - 0x0000fcef
    section, .rodata: 0x0000fcf0 - 0x00010043
    section, .data: 0x00010048 - 0x00013017
    section, .mmu_tbl: 0x00014000 - 0x00017fff
    section, .init_array: 0x00018000 - 0x00018003
    section, .fini_array: 0x00018004 - 0x00018007
    section, .rsa_ac: 0x00018008 - 0x0001903f
    section, .bss: 0x00019040 - 0x0001b3ff
    section, .heap: 0x0001b400 - 0x0001d3ff
    section, .stack: 0xffff0000 - 0xffffd3ff

Successfully downloaded  fsbl.elf
Setting PC to Program Start Address 0x00000000

Vitis [13]: s.con()

Info: ARM Cortex-A9 MPCore #0 (target 2) Running
Vitis [14]: s.stop()

Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0xfcac (Suspended)

# Download the application program
Vitis [15]: s.dow('test_jtag_uart.elf')
Downloading Program -- test_jtag_uart.elf
    section, .text: 0x00100000 - 0x00101503
    section, .init: 0x00101504 - 0x0010150f
    section, .fini: 0x00101510 - 0x0010151b
    section, .rodata: 0x0010151c - 0x001016cc
    section, .data: 0x001016d0 - 0x00101b3f
    section, .eh_frame: 0x00101b40 - 0x00101b43
    section, .mmu_tbl: 0x00104000 - 0x00107fff
    section, .init_array: 0x00108000 - 0x00108003
    section, .fini_array: 0x00108004 - 0x00108007
    section, .bss: 0x00108008 - 0x0010802f
    section, .heap: 0x00108030 - 0x0010a02f
    section, .stack: 0x0010a030 - 0x0010d82f

Successfully downloaded  test_jtag_uart.elf
Setting PC to Program Start Address 0x00100000

Vitis [16]: s.bpadd(addr='main')
Out[16]: <xsdb._breakpoint.Breakpoint at 0x7f016fe59af0>

Info: Breakpoint 0 status:
	 target 2: {Address: 0x100564 Type: Hardware}
Info: Breakpoint 0 status:
	 target 3: {At col 4: Undefined identifier main. Invalid expression}
Vitis [17]: s.con()

Info: ARM Cortex-A9 MPCore #0 (target 2) Running
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0x100570 (Breakpoint)
main() at ../src/helloworld.c: 57
57: int l_int_b = 20;
Vitis [18]: s.stp()

Info: ARM Cortex-A9 MPCore #0 (target 2) Running
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0x100578 (Step)
main() at ../src/helloworld.c: 58
58: int l_int_a = 40;
Vitis [19]: s.stp()

Info: ARM Cortex-A9 MPCore #0 (target 2) Running
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0x100580 (Step)
main() at ../src/helloworld.c: 60
60: init_platform();
Vitis [20]: s.rrd()
             r0: 00000000               r1: 00000000               r2: 00000001
             r3: 00000028               r4: 00000003               r5: 0000001e
             r6: 0000ffff               r7: f8f00000               r8: 0000767b
             r9: ffffffff              r10: 00000000              r11: 0010c02c
            r12: 00000000               sp: 0010c020               lr: 001007bc
             pc: 00100580             cpsr: 6000005f              usr
            fiq                        irq                        abt
            und                        svc                        mon
            vfp                       cp15                    Jazelle
 gpv_qos301_cpu            gpv_qos301_dmac             gpv_qos301_iou
  gpv_trustzone                    l2cache                     mpcore


Vitis [21]: s.mrd(0xe000d000)
E000D000 :  800A0000

# Local variable value can be modified
Vitis [22]: s.locals()
l_int_b   : 20
l_int_a   : 40

Vitis [23]: s.locals(name='l_int_b', val=815)

Vitis [24]: s.locals(name='l_int_b')
l_int_b   : 815

# Global variables and be displayed, and its value can be modified
Vitis [25]: s.print(expr='g_int_a')
g_int_a   : 60

Vitis [26]: s.print(expr='g_int_a', val=9919)

Vitis [27]: s.print(expr='g_int_a')
g_int_a   : 9919

# Expressions can be evaluated and its value can be displayed
Vitis [28]: s.print('--add', expr='l_int_a + l_int_b')
l_int_a + l_int_b  : 855

# Step over a line of source code
Vitis [29]: s.nxt()

Info: ARM Cortex-A9 MPCore #0 (target 2) Running
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0x100584 (Step)
main() at ../src/helloworld.c: 61
61: test_function(l_int_a, l_int_b);

# View stack trace
Vitis [30]: s.bt()
0  0x100584 main()+32:../src/helloworld.c, line 61
1  0x1007bc _start()+88:xil-crt0.S, line 119
2  unknown-pc

# Set a breakpoint at exit and resume execution
Vitis [31]: s.bpadd(addr='&exit')
Out[29]: <xsdb._breakpoint.Breakpoint at 0x7f016fd2c5e0>

Info: Breakpoint 1 status:
	 target 2: {Address: 0x1012ac Type: Hardware}
Info: Breakpoint 1 status:
	 target 3: {At col 5: Undefined identifier exit. Invalid expression}
Vitis [32]: s.con()

Info: ARM Cortex-A9 MPCore #0 (target 2) Running
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0x1012ac (Breakpoint)

 # View stack trace
Vitis [33]: s.bt()
0  0x1012ac exit()+0
1  0x71034f12

Select_target_based_on_target_properties:

Vitis [2]: import xsdb

Vitis [3]: s = xsdb.start_debug_session()

# connecting to the target
Vitis [4]: s.connect(url="TCP:xhdbfarmrke9:3121")
tcfchan#0
Out[4]: 'tcfchan#0'

# check the jtag targets connected, the IDs listed with jtag targets are called node IDs
Vitis [5]: s.jtag_targets()
     1  Digilent JTAG-SMT1 210203344713A ( is_pdi_programmable)
        2  arm_dap (idcode 4ba00477 irlen 4 is_pdi_programmable)
        3  xc7z020 (idcode 23727093 irlen 6 fpga is_pdi_programmable)

# check the targets connected, the IDs listed with targets are called target IDs
Vitis [6]: s.targets()
     1  APU
        2  ARM Cortex-A9 MPCore #0 (Breakpoint)
        3  ARM Cortex-A9 MPCore #1 (Running)
     4  xc7z020

# check jtag target properties of 2nd device (2nd ARM DAP). Note the target_ctx here.
Vitis [7]: s.jtag_targets('-t', filter="node_id == 2")
Out[7]:
{'jsn-JTAG-SMT1-210203344713A-4ba00477-0': {'target_ctx': 'jsn-JTAG-SMT1-210203344713A-4ba00477-0',
  'level': 1,
  'node_id': 2,
  'is_open': 1,
  'is_active': 1,
  'is_current': 0,
  'name': 'arm_dap',
  'jtag_cable_name': 'Digilent JTAG-SMT1 210203344713A',
  'state': '',
  'jtag_cable_manufacturer': 'Digilent',
  'jtag_cable_product': 'JTAG-SMT1',
  'jtag_cable_serial': '210203344713A',
  'idcode': '4ba00477',
  'irlen': '4',
  'is_fpga': 0,
  'is_pdi_programmable': 0}}

# using the target context, select the targets associated with the JTAG target (2nd ARM DAP - node id = 2)
Vitis [8]: s.targets(filter="jtag_device_ctx == jsn-JTAG-SMT1-210203344713A-4ba0
      ...: 0477-0")
     1  APU
        2  ARM Cortex-A9 MPCore #0 (Breakpoint)
        3  ARM Cortex-A9 MPCore #1 (Running)

Debugging_prog_already_running_on_target:

Vitis [1]: import xsdb

Vitis [2]: s = xsdb.start_debug_session()

# connecting to the target
Vitis [3]: s.connect(url="TCP:xhdbfarmrke9:3121")
tcfchan#0
Out[3]: 'tcfchan#0'

# Select the target on which the program is running and specify the symbol file using the
# memmap command

Vitis [4]: s.target(2)
Out[4]: <xsdb._target.Target at 0x7f3167dd12e0>

Vitis [5]: s.memmap(file='test_jtag_uart.elf')

# When the symbol file is specified, the debugger maps the code on the target to the symbol
# file. bt command can be used to see the back trace. Further debug is possible, as shown in
# the first example

Vitis [6]: s.stop()
Info: ARM Cortex-A9 MPCore #0 (target 2) Stopped at 0x10101c (Suspended)
sleep_A9() at sleep.c: 63
63: } while (tCur < tEnd);

Vitis [7]: s.backtrace()
0  0x10101c sleep_A9()+56:sleep.c, line 63
1  0x100608 test_function()+76:../src/helloworld.c, line 78
2  0x100590 main()+44:../src/helloworld.c, line 61
3  0x1007ac _start()+88:xil-crt0.S, line 119
4  unknown-pc

Debug_app_on_zu_plus_mpsoc:

Vitis [1]: import xsdb

Vitis [2]: s = xsdb.start_debug_session()

# connect to remote hw_server by specifying its url.
# If the hardware is connected to a local machine,-url option and the <url>
# are not needed. connect command returns the channel ID of the connection
Vitis [3]: s.connect(url="TCP:xhdbfarmrkk5:3121")
tcfchan#0
Out[3]: 'tcfchan#0'

# List available targets and select a target through its id.
# The targets are assigned IDs as they are discovered on the Jtag chain,
# so the IDs can change from session to session.
Vitis [4]:  s.targets()
     1  PS TAP
        2  PMU
        3  PL
     4  PSU
        5  RPU (Reset)
           6  Cortex-R5 #0 (RPU Reset)
           7  Cortex-R5 #1 (RPU Reset)
        8  APU (L2 Cache Reset)
           9  Cortex-A53 #0 (APU Reset)
          10  Cortex-A53 #1 (APU Reset)
          11  Cortex-A53 #2 (APU Reset)
          12  Cortex-A53 #3 (APU Reset)

Vitis [5]: s.targets("--set", filter="name =~ PSU")
Out[5]: <xsdb._target.Target at 0x7fe9ca93bac0>

Vitis [6]: s.ta()
     1  PS TAP
        2  PMU
        3  PL
     4* PSU
        5  RPU (Reset)
           6  Cortex-R5 #0 (RPU Reset)
           7  Cortex-R5 #1 (RPU Reset)
        8  APU (L2 Cache Reset)
           9  Cortex-A53 #0 (APU Reset)
          10  Cortex-A53 #1 (APU Reset)
          11  Cortex-A53 #2 (APU Reset)
          12  Cortex-A53 #3 (APU Reset)


Vitis [7]: s.rst(type='system')

# Configure the FPGA. When the active target is not a FPGA device,
# the first FPGA device is configured
Vitis [8]: s.fpga(file='zcu102.bit')
100%    3.86MB    1.66MB/s    00:02ETA

Vitis [9]: s.targets(10)
Out[9]: <xsdb._target.Target at 0x7fe9a99347f0>

Vitis [10]: s.rst(type='cores')

Info: Cortex-A53 #0 (target 9) Stopped at 0xffff0000 (Reset Catch)
Info: Cortex-A53 #1 (target 10) Stopped at 0xffff0000 (Reset Catch)
Info: Cortex-A53 #2 (target 11) Stopped at 0xffff0000 (Reset Catch)
Info: Cortex-A53 #3 (target 12) Stopped at 0xffff0000 (Reset Catch)

# run fsbl to initialize PS
Vitis [11]: s.dow('fsbl_a53.elf')
Downloading Program -- fsbl_a53.elf
    section, .text: 0xfffc0000 - 0xfffd65b7
    section, .note.gnu.build-id: 0xfffd65b8 - 0xfffd65db
    section, .init: 0xfffd6600 - 0xfffd6633
    section, .fini: 0xfffd6640 - 0xfffd6673
    section, .rodata: 0xfffd6680 - 0xfffd6b94
    section, .sys_cfg_data: 0xfffd6bc0 - 0xfffd732b
    section, .mmu_tbl0: 0xfffd8000 - 0xfffd800f
    section, .mmu_tbl1: 0xfffd9000 - 0xfffdafff
    section, .mmu_tbl2: 0xfffdb000 - 0xfffdefff
    section, .data: 0xfffdf000 - 0xfffe02c7
    section, .sbss: 0xfffe02c8 - 0xfffe02ff
    section, .bss: 0xfffe0300 - 0xfffe297f
    section, .heap: 0xfffe2980 - 0xfffe2d7f
    section, .stack: 0xfffe2d80 - 0xfffe4d7f
    section, .dup_data: 0xfffe4d80 - 0xfffe6047
    section, .handoff_params: 0xfffe9e00 - 0xfffe9e87
    section, .bitstream_buffer: 0xffff0040 - 0xfffffc3f

Successfully downloaded  fsbl_a53.elf
Setting PC to Program Start Address 0xfffc0000

Vitis [12]: s.con()

Info: Cortex-A53 #1 (target 10) Running
Vitis [13]: s.stop()

Info: Cortex-A53 #1 (target 10) Stopped at 0xfffd2c7c (External Debug Request)

# run the application
Vitis [14]: s.dow('zcu102_hello.elf')
Downloading Program -- zcu102_hello.elf
    section, .text: 0x00000000 - 0x000020b3
    section, .init: 0x000020c0 - 0x000020f3
    section, .fini: 0x00002100 - 0x00002133
    section, .rodata: 0x00002140 - 0x00002360
    section, .rodata1: 0x00002361 - 0x0000237f
    section, .sdata2: 0x00002380 - 0x0000237f
    section, .sbss2: 0x00002380 - 0x0000237f
    section, .data: 0x00002380 - 0x00002bb7
    section, .data1: 0x00002bb8 - 0x00002bbf
    section, .note.gnu.build-id: 0x00002bc0 - 0x00002be3
    section, .ctors: 0x00002be4 - 0x00002bff
    section, .dtors: 0x00002c00 - 0x00002bff
    section, .eh_frame: 0x00002c00 - 0x00002c03
    section, .mmu_tbl0: 0x00003000 - 0x0000300f
    section, .mmu_tbl1: 0x00004000 - 0x00005fff
    section, .mmu_tbl2: 0x00006000 - 0x00009fff
    section, .preinit_array: 0x0000a000 - 0x00009fff
    section, .init_array: 0x0000a000 - 0x0000a007
    section, .fini_array: 0x0000a008 - 0x0000a047
    section, .sdata: 0x0000a048 - 0x0000a07f
    section, .sbss: 0x0000a080 - 0x0000a07f
    section, .tdata: 0x0000a080 - 0x0000a07f
    section, .tbss: 0x0000a080 - 0x0000a07f
    section, .bss: 0x0000a080 - 0x0000a0bf
    section, .heap: 0x0000a0c0 - 0x0000c0bf
    section, .stack: 0x0000c0c0 - 0x0000f0bf

Successfully downloaded  zcu102_hello.elf
Setting PC to Program Start Address 0x00000000

Vitis [15]: s.bpadd(addr='main')
Out[15]: <xsdb._breakpoint.Breakpoint at 0x7fe9cae59cd0>

Info: Breakpoint 0 status:
	 target 6: {At col 4: Undefined identifier main. Invalid expression}
Info: Breakpoint 0 status:
	 target 7: {At col 4: Undefined identifier main. Invalid expression}
Info: Breakpoint 0 status:
	 target 9: {At col 4: Undefined identifier main. Invalid expression}
Info: Breakpoint 0 status:
	 target 10: {Address: 0xd00 Type: Hardware}
Info: Breakpoint 0 status:
	 target 11: {At col 4: Undefined identifier main. Invalid expression}
Info: Breakpoint 0 status:
	 target 12: {At col 4: Undefined identifier main. Invalid expression}
Vitis [16]: s.con()

Info: Cortex-A53 #1 (target 10) Running
Info: Cortex-A53 #1 (target 10) Stopped at 0xd08 (Breakpoint)
main() at ../src/helloworld.c: 29
29: int l_int_b = 20;
Vitis [17]: s.rrd()
      r0: 00000000        r1: 00000000        r2: 00000000        r3: 00000004
      r4: 0000000f        r5: ffffffff        r6: 0000001c        r7: 00000002
      r8: ffffffff        r9: 00000000       r10: fd5c0090       r11: 00000000
     r12: 00000000       r13: 00000000       r14: 00000000       r15: 00000000
     r16: 00000000       r17: 00000000       r18: 00000000       r19: 00000000
     r20: 00000000       r21: 00000000       r22: 00000000       r23: 00000000
     r24: 00000000       r25: 00000000       r26: 00000000       r27: 00000000
     r28: 00000000       r29: 0000e0a0       r30: 00000f34        sp: 0000e0a0
      pc: 00000d08      cpsr: 600002cd       vfp                 sys
     dbg            acpu_gic


Vitis [18]: s.stp()

Info: Cortex-A53 #1 (target 10) Running
Info: Cortex-A53 #1 (target 10) Stopped at 0xd10 (Step)
main() at ../src/helloworld.c: 30
30: int l_int_a = 40;
Vitis [19]: s.stp()

Info: Cortex-A53 #1 (target 10) Running
Info: Cortex-A53 #1 (target 10) Stopped at 0xd18 (Step)
main() at ../src/helloworld.c: 32
32: init_platform();

# Local variable value can be modified
Vitis [20]: s.locals()
l_int_b   : 20
l_int_a   : 40

Vitis [21]: s.locals(name='l_int_b', val=815)

Vitis [22]: s.locals(name='l_int_b')
l_int_b   : 815

# Global variables and be displayed, and its value can be modified
Vitis [23]: s.print(expr='g_int_a')
g_int_a   : 60

Vitis [24]: s.print(expr='g_int_a', val=9919)

Vitis [25]: s.print(expr='g_int_a')
g_int_a   : 9919

# Expressions can be evaluated and its value can be displayed
Vitis [26]: s.print('--add', expr='l_int_a + l_int_b')
l_int_a + l_int_b  : 855

# Step over a line of source code
Vitis [27]: s.nxt()

Info: Cortex-A53 #1 (target 10) Running
Info: Cortex-A53 #1 (target 10) Stopped at 0xd1c (Step)
main() at ../src/helloworld.c: 33
33: test_function(l_int_a, l_int_b);

# View stack trace
Vitis [28]: s.bt()
0  0xd1c main()+28:../src/helloworld.c, line 33
1  0xf34 _startup()+124:xil-crt0.S, line 157

# Set a breakpoint at exit and resume execution
Vitis [29]: s.bpadd(addr='&exit')
Info: Breakpoint 1 status:
	 target 6: {At col 5: Undefined identifier exit. Invalid expression}
Info: Breakpoint 1 status:
	 target 7: {At col 5: Undefined identifier exit. Invalid expression}
Info: Breakpoint 1 status:
	 target 9: {At col 5: Undefined identifier exit. Invalid expression}
Info: Breakpoint 1 status:
	 target 10: {Address: 0x1a90 Type: Hardware}
Info: Breakpoint 1 status:
	 target 11: {At col 5: Undefined identifier exit. Invalid expression}
Info: Breakpoint 1 status:
	 target 12: {At col 5: Undefined identifier exit. Invalid expression}
Out[29]: <xsdb._breakpoint.Breakpoint at 0x7fe9a35e9ca0>

Vitis [30]: s.con()

Info: Cortex-A53 #1 (target 10) Running

Vitis [31]: s.stop()
Info: Cortex-A53 #1 (target 10) Stopped at 0x192c (External Debug Request)
sleep_A53() at sleep.c: 71
71: } while (tCur < tEnd);

# View stack trace
Vitis [32]: s.bt()
0  0x192c sleep_A53()+44:sleep.c, line 71
1  0x192c sleep_A53()+44:sleep.c, line 70