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+++ This bug was initially created as a clone of Bug #1850710 +++

Description of problem:

When I attempt to single-step into JIT-compiled code on S390x,
my gdb process gets stopped and backgrounded as soon as I execute
the basr instruction that called the JIT-compiled function.
I can fg the process, at which point gdb reports "PC not saved."
If I stepi again, exactly the same thing happens.

Each time I fg the process, I can see the pc incrementing, and
instruction effects (e.g. changes to contents of general registers)
have clearly taken place.  The command "disp/i $pc" works as
expected.  The "disassemble" command works fine, e.g.
disassemble $pc, $pc+10.

*** This bug tracks the terminal issues reported in the original bug. ***

Reproduced against gdb-8.2-12.el8 and verified against both gdb-8.2-13.el8 and gdb-8.2-14.el8.

Verified against gdb-8.2-14.el8.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (gdb bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:1836