Viewing file:  vmalloc.py (2.13 KB) -rw-r--r--
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# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2023 MediaTek Inc.
#
# Authors:
# Kuan-Ying Lee <[email protected]>
#
import gdb
import re
from linux import lists, utils, stackdepot, constants, mm
if constants.LX_CONFIG_MMU:
vmap_area_type = utils.CachedType('struct vmap_area')
vmap_area_ptr_type = vmap_area_type.get_type().pointer()
def is_vmalloc_addr(x):
pg_ops = mm.page_ops().ops
addr = pg_ops.kasan_reset_tag(x)
return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END
class LxVmallocInfo(gdb.Command):
"""Show vmallocinfo"""
def __init__(self):
super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
def invoke(self, arg, from_tty):
if not constants.LX_CONFIG_MMU:
raise gdb.GdbError("Requires MMU support")
vmap_area_list = gdb.parse_and_eval('vmap_area_list')
for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"):
if not vmap_area['vm']:
gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'],
vmap_area['va_end'] - vmap_area['va_start']))
continue
v = vmap_area['vm']
gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size']))
if v['caller']:
gdb.write(" %s" % str(v['caller']).split(' ')[-1])
if v['nr_pages']:
gdb.write(" pages=%d" % v['nr_pages'])
if v['phys_addr']:
gdb.write(" phys=0x%x" % v['phys_addr'])
if v['flags'] & constants.LX_VM_IOREMAP:
gdb.write(" ioremap")
if v['flags'] & constants.LX_VM_ALLOC:
gdb.write(" vmalloc")
if v['flags'] & constants.LX_VM_MAP:
gdb.write(" vmap")
if v['flags'] & constants.LX_VM_USERMAP:
gdb.write(" user")
if v['flags'] & constants.LX_VM_DMA_COHERENT:
gdb.write(" dma-coherent")
if is_vmalloc_addr(v['pages']):
gdb.write(" vpages")
gdb.write("\n")
LxVmallocInfo()
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