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-rw-r--r--scripts/gdb/linux/constants.py.in7
-rw-r--r--scripts/gdb/linux/cpus.py4
-rw-r--r--scripts/gdb/linux/interrupts.py16
-rw-r--r--scripts/gdb/linux/mapletree.py252
-rw-r--r--scripts/gdb/linux/symbols.py38
-rw-r--r--scripts/gdb/linux/utils.py22
-rw-r--r--scripts/gdb/linux/vfs.py2
-rw-r--r--scripts/gdb/linux/xarray.py28
8 files changed, 339 insertions, 30 deletions
diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index fd6bd69c5096..f795302ddfa8 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -20,6 +20,7 @@
#include <linux/of_fdt.h>
#include <linux/page_ext.h>
#include <linux/radix-tree.h>
+#include <linux/maple_tree.h>
#include <linux/slab.h>
#include <linux/threads.h>
#include <linux/vmalloc.h>
@@ -93,6 +94,12 @@ LX_GDBPARSED(RADIX_TREE_MAP_SIZE)
LX_GDBPARSED(RADIX_TREE_MAP_SHIFT)
LX_GDBPARSED(RADIX_TREE_MAP_MASK)
+/* linux/maple_tree.h */
+LX_VALUE(MAPLE_NODE_SLOTS)
+LX_VALUE(MAPLE_RANGE64_SLOTS)
+LX_VALUE(MAPLE_ARANGE64_SLOTS)
+LX_GDBPARSED(MAPLE_NODE_MASK)
+
/* linux/vmalloc.h */
LX_VALUE(VM_IOREMAP)
LX_VALUE(VM_ALLOC)
diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
index f506965ea759..6edf4ef61636 100644
--- a/scripts/gdb/linux/cpus.py
+++ b/scripts/gdb/linux/cpus.py
@@ -141,7 +141,7 @@ LxCpus()
class PerCpu(gdb.Function):
"""Return per-cpu variable.
-$lx_per_cpu("VAR"[, CPU]): Return the per-cpu variable called VAR for the
+$lx_per_cpu(VAR[, CPU]): Return the per-cpu variable called VAR for the
given CPU number. If CPU is omitted, the CPU of the current context is used.
Note that VAR has to be quoted as string."""
@@ -158,7 +158,7 @@ PerCpu()
class PerCpuPtr(gdb.Function):
"""Return per-cpu pointer.
-$lx_per_cpu_ptr("VAR"[, CPU]): Return the per-cpu pointer called VAR for the
+$lx_per_cpu_ptr(VAR[, CPU]): Return the per-cpu pointer called VAR for the
given CPU number. If CPU is omitted, the CPU of the current context is used.
Note that VAR has to be quoted as string."""
diff --git a/scripts/gdb/linux/interrupts.py b/scripts/gdb/linux/interrupts.py
index 616a5f26377a..f4f715a8f0e3 100644
--- a/scripts/gdb/linux/interrupts.py
+++ b/scripts/gdb/linux/interrupts.py
@@ -7,7 +7,7 @@ import gdb
from linux import constants
from linux import cpus
from linux import utils
-from linux import radixtree
+from linux import mapletree
irq_desc_type = utils.CachedType("struct irq_desc")
@@ -23,12 +23,12 @@ def irqd_is_level(desc):
def show_irq_desc(prec, irq):
text = ""
- desc = radixtree.lookup(gdb.parse_and_eval("&irq_desc_tree"), irq)
+ desc = mapletree.mtree_load(gdb.parse_and_eval("&sparse_irqs"), irq)
if desc is None:
return text
- desc = desc.cast(irq_desc_type.get_type())
- if desc is None:
+ desc = desc.cast(irq_desc_type.get_type().pointer())
+ if desc == 0:
return text
if irq_settings_is_hidden(desc):
@@ -110,7 +110,7 @@ def x86_show_mce(prec, var, pfx, desc):
pvar = gdb.parse_and_eval(var)
text = "%*s: " % (prec, pfx)
for cpu in cpus.each_online_cpu():
- text += "%10u " % (cpus.per_cpu(pvar, cpu))
+ text += "%10u " % (cpus.per_cpu(pvar, cpu).dereference())
text += " %s\n" % (desc)
return text
@@ -142,7 +142,7 @@ def x86_show_interupts(prec):
if constants.LX_CONFIG_X86_MCE:
text += x86_show_mce(prec, "&mce_exception_count", "MCE", "Machine check exceptions")
- text == x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls")
+ text += x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls")
text += show_irq_err_count(prec)
@@ -221,8 +221,8 @@ class LxInterruptList(gdb.Command):
gdb.write("CPU%-8d" % cpu)
gdb.write("\n")
- if utils.gdb_eval_or_none("&irq_desc_tree") is None:
- return
+ if utils.gdb_eval_or_none("&sparse_irqs") is None:
+ raise gdb.GdbError("Unable to find the sparse IRQ tree, is CONFIG_SPARSE_IRQ enabled?")
for irq in range(nr_irqs):
gdb.write(show_irq_desc(prec, irq))
diff --git a/scripts/gdb/linux/mapletree.py b/scripts/gdb/linux/mapletree.py
new file mode 100644
index 000000000000..d52d51c0a03f
--- /dev/null
+++ b/scripts/gdb/linux/mapletree.py
@@ -0,0 +1,252 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Maple tree helpers
+#
+# Copyright (c) 2025 Broadcom
+#
+# Authors:
+# Florian Fainelli <florian.fainelli@broadcom.com>
+
+import gdb
+
+from linux import utils
+from linux import constants
+from linux import xarray
+
+maple_tree_root_type = utils.CachedType("struct maple_tree")
+maple_node_type = utils.CachedType("struct maple_node")
+maple_enode_type = utils.CachedType("void")
+
+maple_dense = 0
+maple_leaf_64 = 1
+maple_range_64 = 2
+maple_arange_64 = 3
+
+class Mas(object):
+ ma_active = 0
+ ma_start = 1
+ ma_root = 2
+ ma_none = 3
+ ma_pause = 4
+ ma_overflow = 5
+ ma_underflow = 6
+ ma_error = 7
+
+ def __init__(self, mt, first, end):
+ if mt.type == maple_tree_root_type.get_type().pointer():
+ self.tree = mt.dereference()
+ elif mt.type != maple_tree_root_type.get_type():
+ raise gdb.GdbError("must be {} not {}"
+ .format(maple_tree_root_type.get_type().pointer(), mt.type))
+ self.tree = mt
+ self.index = first
+ self.last = end
+ self.node = None
+ self.status = self.ma_start
+ self.min = 0
+ self.max = -1
+
+ def is_start(self):
+ # mas_is_start()
+ return self.status == self.ma_start
+
+ def is_ptr(self):
+ # mas_is_ptr()
+ return self.status == self.ma_root
+
+ def is_none(self):
+ # mas_is_none()
+ return self.status == self.ma_none
+
+ def root(self):
+ # mas_root()
+ return self.tree['ma_root'].cast(maple_enode_type.get_type().pointer())
+
+ def start(self):
+ # mas_start()
+ if self.is_start() is False:
+ return None
+
+ self.min = 0
+ self.max = ~0
+
+ while True:
+ self.depth = 0
+ root = self.root()
+ if xarray.xa_is_node(root):
+ self.depth = 0
+ self.status = self.ma_active
+ self.node = mte_safe_root(root)
+ self.offset = 0
+ if mte_dead_node(self.node) is True:
+ continue
+
+ return None
+
+ self.node = None
+ # Empty tree
+ if root is None:
+ self.status = self.ma_none
+ self.offset = constants.LX_MAPLE_NODE_SLOTS
+ return None
+
+ # Single entry tree
+ self.status = self.ma_root
+ self.offset = constants.LX_MAPLE_NODE_SLOTS
+
+ if self.index != 0:
+ return None
+
+ return root
+
+ return None
+
+ def reset(self):
+ # mas_reset()
+ self.status = self.ma_start
+ self.node = None
+
+def mte_safe_root(node):
+ if node.type != maple_enode_type.get_type().pointer():
+ raise gdb.GdbError("{} must be {} not {}"
+ .format(mte_safe_root.__name__, maple_enode_type.get_type().pointer(), node.type))
+ ulong_type = utils.get_ulong_type()
+ indirect_ptr = node.cast(ulong_type) & ~0x2
+ val = indirect_ptr.cast(maple_enode_type.get_type().pointer())
+ return val
+
+def mte_node_type(entry):
+ ulong_type = utils.get_ulong_type()
+ val = None
+ if entry.type == maple_enode_type.get_type().pointer():
+ val = entry.cast(ulong_type)
+ elif entry.type == ulong_type:
+ val = entry
+ else:
+ raise gdb.GdbError("{} must be {} not {}"
+ .format(mte_node_type.__name__, maple_enode_type.get_type().pointer(), entry.type))
+ return (val >> 0x3) & 0xf
+
+def ma_dead_node(node):
+ if node.type != maple_node_type.get_type().pointer():
+ raise gdb.GdbError("{} must be {} not {}"
+ .format(ma_dead_node.__name__, maple_node_type.get_type().pointer(), node.type))
+ ulong_type = utils.get_ulong_type()
+ parent = node['parent']
+ indirect_ptr = node['parent'].cast(ulong_type) & ~constants.LX_MAPLE_NODE_MASK
+ return indirect_ptr == node
+
+def mte_to_node(enode):
+ ulong_type = utils.get_ulong_type()
+ if enode.type == maple_enode_type.get_type().pointer():
+ indirect_ptr = enode.cast(ulong_type)
+ elif enode.type == ulong_type:
+ indirect_ptr = enode
+ else:
+ raise gdb.GdbError("{} must be {} not {}"
+ .format(mte_to_node.__name__, maple_enode_type.get_type().pointer(), enode.type))
+ indirect_ptr = indirect_ptr & ~constants.LX_MAPLE_NODE_MASK
+ return indirect_ptr.cast(maple_node_type.get_type().pointer())
+
+def mte_dead_node(enode):
+ if enode.type != maple_enode_type.get_type().pointer():
+ raise gdb.GdbError("{} must be {} not {}"
+ .format(mte_dead_node.__name__, maple_enode_type.get_type().pointer(), enode.type))
+ node = mte_to_node(enode)
+ return ma_dead_node(node)
+
+def ma_is_leaf(tp):
+ result = tp < maple_range_64
+ return tp < maple_range_64
+
+def mt_pivots(t):
+ if t == maple_dense:
+ return 0
+ elif t == maple_leaf_64 or t == maple_range_64:
+ return constants.LX_MAPLE_RANGE64_SLOTS - 1
+ elif t == maple_arange_64:
+ return constants.LX_MAPLE_ARANGE64_SLOTS - 1
+
+def ma_pivots(node, t):
+ if node.type != maple_node_type.get_type().pointer():
+ raise gdb.GdbError("{}: must be {} not {}"
+ .format(ma_pivots.__name__, maple_node_type.get_type().pointer(), node.type))
+ if t == maple_arange_64:
+ return node['ma64']['pivot']
+ elif t == maple_leaf_64 or t == maple_range_64:
+ return node['mr64']['pivot']
+ else:
+ return None
+
+def ma_slots(node, tp):
+ if node.type != maple_node_type.get_type().pointer():
+ raise gdb.GdbError("{}: must be {} not {}"
+ .format(ma_slots.__name__, maple_node_type.get_type().pointer(), node.type))
+ if tp == maple_arange_64:
+ return node['ma64']['slot']
+ elif tp == maple_range_64 or tp == maple_leaf_64:
+ return node['mr64']['slot']
+ elif tp == maple_dense:
+ return node['slot']
+ else:
+ return None
+
+def mt_slot(mt, slots, offset):
+ ulong_type = utils.get_ulong_type()
+ return slots[offset].cast(ulong_type)
+
+def mtree_lookup_walk(mas):
+ ulong_type = utils.get_ulong_type()
+ n = mas.node
+
+ while True:
+ node = mte_to_node(n)
+ tp = mte_node_type(n)
+ pivots = ma_pivots(node, tp)
+ end = mt_pivots(tp)
+ offset = 0
+ while True:
+ if pivots[offset] >= mas.index:
+ break
+ if offset >= end:
+ break
+ offset += 1
+
+ slots = ma_slots(node, tp)
+ n = mt_slot(mas.tree, slots, offset)
+ if ma_dead_node(node) is True:
+ mas.reset()
+ return None
+ break
+
+ if ma_is_leaf(tp) is True:
+ break
+
+ return n
+
+def mtree_load(mt, index):
+ ulong_type = utils.get_ulong_type()
+ # MT_STATE(...)
+ mas = Mas(mt, index, index)
+ entry = None
+
+ while True:
+ entry = mas.start()
+ if mas.is_none():
+ return None
+
+ if mas.is_ptr():
+ if index != 0:
+ entry = None
+ return entry
+
+ entry = mtree_lookup_walk(mas)
+ if entry is None and mas.is_start():
+ continue
+ else:
+ break
+
+ if xarray.xa_is_zero(entry):
+ return None
+
+ return entry
diff --git a/scripts/gdb/linux/symbols.py b/scripts/gdb/linux/symbols.py
index b255177301e9..2332bd8eddf1 100644
--- a/scripts/gdb/linux/symbols.py
+++ b/scripts/gdb/linux/symbols.py
@@ -38,19 +38,13 @@ if hasattr(gdb, 'Breakpoint'):
# Disable pagination while reporting symbol (re-)loading.
# The console input is blocked in this context so that we would
# get stuck waiting for the user to acknowledge paged output.
- show_pagination = gdb.execute("show pagination", to_string=True)
- pagination = show_pagination.endswith("on.\n")
- gdb.execute("set pagination off")
-
- if module_name in cmd.loaded_modules:
- gdb.write("refreshing all symbols to reload module "
- "'{0}'\n".format(module_name))
- cmd.load_all_symbols()
- else:
- cmd.load_module_symbols(module)
-
- # restore pagination state
- gdb.execute("set pagination %s" % ("on" if pagination else "off"))
+ with utils.pagination_off():
+ if module_name in cmd.loaded_modules:
+ gdb.write("refreshing all symbols to reload module "
+ "'{0}'\n".format(module_name))
+ cmd.load_all_symbols()
+ else:
+ cmd.load_module_symbols(module)
return False
@@ -60,6 +54,18 @@ def get_vmcore_s390():
vmcore_info = 0x0e0c
paddr_vmcoreinfo_note = gdb.parse_and_eval("*(unsigned long long *)" +
hex(vmcore_info))
+ if paddr_vmcoreinfo_note == 0 or paddr_vmcoreinfo_note & 1:
+ # In the early boot case, extract vm_layout.kaslr_offset from the
+ # vmlinux image in physical memory.
+ if paddr_vmcoreinfo_note == 0:
+ kaslr_offset_phys = 0
+ else:
+ kaslr_offset_phys = paddr_vmcoreinfo_note - 1
+ with utils.pagination_off():
+ gdb.execute("symbol-file {0} -o {1}".format(
+ utils.get_vmlinux(), hex(kaslr_offset_phys)))
+ kaslr_offset = gdb.parse_and_eval("vm_layout.kaslr_offset")
+ return "KERNELOFFSET=" + hex(kaslr_offset)[2:]
inferior = gdb.selected_inferior()
elf_note = inferior.read_memory(paddr_vmcoreinfo_note, 12)
n_namesz, n_descsz, n_type = struct.unpack(">III", elf_note)
@@ -178,11 +184,7 @@ lx-symbols command."""
saved_states.append({'breakpoint': bp, 'enabled': bp.enabled})
# drop all current symbols and reload vmlinux
- orig_vmlinux = 'vmlinux'
- for obj in gdb.objfiles():
- if (obj.filename.endswith('vmlinux') or
- obj.filename.endswith('vmlinux.debug')):
- orig_vmlinux = obj.filename
+ orig_vmlinux = utils.get_vmlinux()
gdb.execute("symbol-file", to_string=True)
kerneloffset = get_kerneloffset()
if kerneloffset is None:
diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py
index 03ebdccf5f69..e11f6f67961a 100644
--- a/scripts/gdb/linux/utils.py
+++ b/scripts/gdb/linux/utils.py
@@ -200,7 +200,7 @@ def get_gdbserver_type():
def probe_kgdb():
try:
- thread_info = gdb.execute("info thread 2", to_string=True)
+ thread_info = gdb.execute("info thread 1", to_string=True)
return "shadowCPU" in thread_info
except gdb.error:
return False
@@ -251,3 +251,23 @@ def parse_vmcore(s):
else:
kerneloffset = int(match.group(1), 16)
return VmCore(kerneloffset=kerneloffset)
+
+
+def get_vmlinux():
+ vmlinux = 'vmlinux'
+ for obj in gdb.objfiles():
+ if (obj.filename.endswith('vmlinux') or
+ obj.filename.endswith('vmlinux.debug')):
+ vmlinux = obj.filename
+ return vmlinux
+
+
+@contextlib.contextmanager
+def pagination_off():
+ show_pagination = gdb.execute("show pagination", to_string=True)
+ pagination = show_pagination.endswith("on.\n")
+ gdb.execute("set pagination off")
+ try:
+ yield
+ finally:
+ gdb.execute("set pagination %s" % ("on" if pagination else "off"))
diff --git a/scripts/gdb/linux/vfs.py b/scripts/gdb/linux/vfs.py
index c77b9ce75f6d..9e921b645a68 100644
--- a/scripts/gdb/linux/vfs.py
+++ b/scripts/gdb/linux/vfs.py
@@ -22,7 +22,7 @@ def dentry_name(d):
if parent == d or parent == 0:
return ""
p = dentry_name(d['d_parent']) + "/"
- return p + d['d_iname'].string()
+ return p + d['d_name']['name'].string()
class DentryName(gdb.Function):
"""Return string of the full path of a dentry.
diff --git a/scripts/gdb/linux/xarray.py b/scripts/gdb/linux/xarray.py
new file mode 100644
index 000000000000..f4477b5def75
--- /dev/null
+++ b/scripts/gdb/linux/xarray.py
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Xarray helpers
+#
+# Copyright (c) 2025 Broadcom
+#
+# Authors:
+# Florian Fainelli <florian.fainelli@broadcom.com>
+
+import gdb
+
+from linux import utils
+from linux import constants
+
+def xa_is_internal(entry):
+ ulong_type = utils.get_ulong_type()
+ return ((entry.cast(ulong_type) & 3) == 2)
+
+def xa_mk_internal(v):
+ return ((v << 2) | 2)
+
+def xa_is_zero(entry):
+ ulong_type = utils.get_ulong_type()
+ return entry.cast(ulong_type) == xa_mk_internal(257)
+
+def xa_is_node(entry):
+ ulong_type = utils.get_ulong_type()
+ return xa_is_internal(entry) and (entry.cast(ulong_type) > 4096)
generated by cgit (git 2.34.1) at 2025-07-24 15:43:55 +0000