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SubjectRe: [PATCH v2 0/2] GDB: Support getting current task struct in UML
On Fri, 17 Feb 2023 19:11:52 -0600 Glenn Washburn <development@efficientek.com> wrote:

> Added suggestions from Jan.
>
> Glenn
>
> Glenn Washburn (2):
> scripts/gdb: Correct indentation in get_current_task
> scripts/gdb: Support getting current task struct in UML
>

For some reason I get a bunch of rejects when applying these on top of
the latest patchpile. Please check my end result:

def get_current_task(cpu):
task_ptr_type = task_type.get_type().pointer()

if utils.is_target_arch("x86"):
if gdb.lookup_global_symbol("cpu_tasks"):
# This is a UML kernel, which stores the current task
# differently than other x86 sub architectures
var_ptr = gdb.parse_and_eval("(struct task_struct *)cpu_tasks[0].task")
return var_ptr.dereference()
else:
var_ptr = gdb.parse_and_eval("&current_task")
return per_cpu(var_ptr, cpu).dereference()
elif utils.is_target_arch("aarch64"):
current_task_addr = gdb.parse_and_eval("$SP_EL0")
if((current_task_addr >> 63) != 0):
current_task = current_task_addr.cast(task_ptr_type)
return current_task.dereference()
else:
raise gdb.GdbError("Sorry, obtaining the current task is not allowed "
"while running in userspace(EL0)")
else:
raise gdb.GdbError("Sorry, obtaining the current task is not yet "
"supported with this arch")



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