diff options
Diffstat (limited to 'scripts/gdb')
| -rw-r--r-- | scripts/gdb/linux/constants.py.in | 7 | ||||
| -rw-r--r-- | scripts/gdb/linux/interrupts.py | 16 | ||||
| -rw-r--r-- | scripts/gdb/linux/mapletree.py | 252 | ||||
| -rw-r--r-- | scripts/gdb/linux/vfs.py | 2 | ||||
| -rw-r--r-- | scripts/gdb/linux/xarray.py | 28 |
5 files changed, 296 insertions, 9 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/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/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) |