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Differences Between Zynq UltraScale+ MPSoC and Versal
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Adaptive SoC
The examples on this page are done on the Zynq UltraScale+ MPSoC platform.
On Versal ACAPAdaptive SoC, the differences are:
- 2 ARM-A CPUs instead of 4
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Reading symbols from test.elf...done.
(gdb) b foo
Breakpoint 1 at 0x400620: file test.c, line 32.
(gdb) r
Starting program: /scratch/gdb-test/test.elf
Breakpoint 1, foo (s=0x7fffffffe1c0) at test.c:32
32 s->str = "This is a string";
(gdb) n
33 memset(s->arr, 0xAA, sizeof(s->arr));
(gdb) n
34 s->var = 1234;
(gdb) n
36 global_var = 0xCC33CC33;
(gdb) n
38 if (s->str == NULL) {
(gdb) x/x &global_var
0x601054 <global_var>: 0xcc33cc33
(gdb) x/4x &global_var
0x601054 <global_var>: 0xcc33cc33 0x00000000 0x00000000 0x00000000
(gdb) x/s s->str
0x400724: "This is a string"
(gdb) info registers
rax 0x7fffffffe1c0 140737488347584
rbx 0x0 0
rcx 0x0 0
rdx 0x8 8
rsi 0x7fffffffe1cc 140737488347596
rdi 0x7fffffffe1c4 140737488347588
rbp 0x7fffffffe1b0 0x7fffffffe1b0
rsp 0x7fffffffe1a0 0x7fffffffe1a0
r8 0x400710 4196112
r9 0x7ffff7de7ab0 140737351940784
r10 0x34e 846
r11 0x7ffff7b7f970 140737349417328
r12 0x4004e0 4195552
r13 0x7fffffffe2d0 140737488347856
r14 0x0 0
r15 0x0 0
rip 0x40065a 0x40065a <foo+70>
eflags 0x246 [ PF ZF IF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
k0 0x0 0
k1 0x0 0
k2 0x0 0
k3 0x0 0
k4 0x0 0
k5 0x0 0
k6 0x0 0
k7 0x0 0
(gdb) n
42 disassemble_me();
(gdb) disassemble disassemble_me
Dump of assembler code for function disassemble_me:
0x0000000000400679 <+0>: push %rbp
0x000000000040067a <+1>: mov %rsp,%rbp
0x000000000040067d <+4>: movq $0x0,-0x8(%rbp)
0x0000000000400685 <+12>: mov -0x8(%rbp),%rax
0x0000000000400689 <+16>: movzbl (%rax),%eax
0x000000000040068c <+19>: mov %al,-0x9(%rbp)
0x000000000040068f <+22>: nop
0x0000000000400690 <+23>: pop %rbp
0x0000000000400691 <+24>: retq
End of assembler dump. |
Debugging Examples
Zynq UltraScale+ MPSoC and
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Versal Adaptive SoC PS + PMU simultaneous debugging
To debug The PS and PMU simultaneously you need to boot up the Microblaze and ARM64 QEMU instances with the -gdb flag.
Once the virtual machines are started, you can remotely target them with two separate instances of GDB.
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| Info |
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Most QEMU arguments are omitted for brevity. A list of example arguments used when booting a Zynq UltraScale+ MPSoC or Versal ACAP Versal Adaptive SoC machine can be found here. |
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