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scripts/gdb: fix parameter handling in $lx_per_cpu

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Before, the script tried to get the address by constructing a pointer to
the parameter (by name).  However, since GDB now passes the parameter as a
GdbValue, we cannot get its name.  Instead, we retrieve the address
through GdbValue's address attribute.

Before:
>>> p $lx_per_cpu(cpu_info)
Traceback (most recent call last):
  File "./scripts/gdb/linux/cpus.py", line 152, in invoke
    var_ptr = gdb.parse_and_eval("&" + var_name.string())
                                       ^^^^^^^^^^^^^^^^^
gdb.error: Trying to read string with inappropriate type `struct cpuinfo_x86'.

Link: https://lkml.kernel.org/r/20240425153501.749966-3-mail@florommel.de
Signed-off-by: Florian Rommel <mail@florommel.de>
Cc: Andrew Jones <ajones@ventanamicro.com>
Cc: Deepak Gupta <debug@rivosinc.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Florian Rommel 2024-04-25 17:34:59 +02:00 committed by Andrew Morton
parent ec0b6d17a5
commit db08c53fdd
1 changed files with 2 additions and 3 deletions
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5
scripts/gdb/linux/cpus.py
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@ -152,9 +152,8 @@ Note that VAR has to be quoted as string."""
def __init__(self):
super(PerCpu, self).__init__("lx_per_cpu")
def invoke(self, var_name, cpu=-1):
var_ptr = gdb.parse_and_eval("&" + var_name.string())
return per_cpu(var_ptr, cpu)
def invoke(self, var, cpu=-1):
return per_cpu(var.address, cpu)
PerCpu()