This doesn't seem to be related to the previous bugs. I tried to reproduce this on 18.04.4 (I don't have 20.04) and a fresh build of GDB master, and I couldn't.
(gdb) disass _start Dump of assembler code for function _start: 0x00010074 <+0>: mov r7, #4 0x00010078 <+4>: mov r0, #1 0x0001007c <+8>: ldr r1, [pc, #12] ; 0x10090 <_start+28> 0x00010080 <+12>: ldr r2, [pc, #12] ; 0x10094 <_start+32> 0x00010084 <+16>: svc 0x00000000 0x00010088 <+20>: mov r7, #1 0x0001008c <+24>: svc 0x00000000 0x00010090 <+28>: muleq r2, r8, r0 0x00010094 <+32>: andeq r0, r0, lr End of assembler dump. (gdb) b _start Breakpoint 1 at 0x10074: file /tmp/hello.S, line 4. (gdb) r Starting program: /tmp/hello Breakpoint 1, _start () at /tmp/hello.S:4 4 MOV R7, #4 With Ubuntu 18.04.4's GDB it also works. Can you please turn on debugging and paste the log? Use "set debug infrun 1" before the run command. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1901966 Title: Unable to stop at breakpoint in 32-bit executable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/1901966/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
