riscv-software-src
qemu+gdb Debug issue
How to use qemu+gdb to debug opensbi When i trying to set breakpoint in sbi_init If i use s It shows Cannot find bounds of current function If i use c ,it's just stop there I'm looking forward to your reply .Thanks.
Reading symbols from /opensbi-1.1/build/platform/generic/firmware/fw_payload.elf... (gdb) target remote:1234 Remote debugging using :1234 0x0000000000001004 in ?? () (gdb) b sbi_init Breakpoint 1 at 0x800005b4: file /opensbi-1.1/lib/sbi/sbi_init.c, line 467. (gdb) s Cannot find bounds of current function (gdb) c Continuing.
Hi, may be you could use si instead of s or step. si works well on my pc.
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(gdb) file /path/to/build/platform/generic/firmware/fw_payload.elf
Reading symbols from /path/to/platform/generic/firmware/fw_payload.elf...
(gdb) target remote :1234
Remote debugging using :1234
0x0000000000001004 in ?? ()
(gdb) b _start
Breakpoint 1 at 0x80000000: file /path/to/opensbi/firmware/fw_base.S, line 50.
(gdb) s
Cannot find bounds of current function
(gdb) si
0x0000000000001008 in ?? ()
(gdb) si
0x000000000000100c in ?? ()
(gdb) step
Cannot find bounds of current function
(gdb) si
0x0000000000001010 in ?? ()
(gdb) si
0x0000000000001014 in ?? ()
(gdb) si
0x0000000000001018 in ?? ()
(gdb) si
Breakpoint 1, _start () at /path/to/firmware/fw_base.S:50
warning: Source file is more recent than executable.
50 MOV_3R s0, a0, s1, a1, s2, a2
(gdb) si
0x0000000080000004 50 MOV_3R s0, a0, s1, a1, s2, a2
(gdb) si
0x0000000080000008 50 MOV_3R s0, a0, s1, a1, s2, a2
(gdb) si
52 call fw_boot_hart
(gdb) si
fw_boot_hart () at /path/to/firmware/fw_payload.S:22
22 li a0, -1
(gdb) si
23 ret
When you build the OpenSBI binary, you can pass "DEBUG=1" on the command line which generates debugger-friendly bits.
When you build the OpenSBI binary, you can pass "DEBUG=1" on the command line which generates debugger-friendly bits.
Thank u so much!