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scripts/gdb: implement x86_page_ops in mm.py

Implement all member functions of x86_page_ops strictly following the logic of aarch64_page_ops. This includes full support for SPARSEMEM and standard page translation functions. This fixes compatibility with 'lx-' commands on x86_64, preventing AttributeErrors when using lx-pfn_to_page and others.

Seongjun Hong committed 9 months ago

Commit 55f8b451 parent 5ed4b6b2 files · +173 −2Browse files

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2 files
  1. scripts/gdb/linux/constants.py.in +1 −1
  2. scripts/gdb/linux/mm.py +172 −1
scripts/gdb/linux/constants.py.in+1−1
@@ -150,8 +150,8 @@ LX_CONFIG(CONFIG_ARM64_64K_PAGES) · 149 unmodified lines
150150 if IS_BUILTIN(CONFIG_ARM64):
151151 LX_VALUE(CONFIG_ARM64_PA_BITS)
152152 LX_VALUE(CONFIG_ARM64_VA_BITS)
153− LX_VALUE(CONFIG_PAGE_SHIFT)
154153 LX_VALUE(CONFIG_ARCH_FORCE_MAX_ORDER)
154+LX_VALUE(CONFIG_PAGE_SHIFT)
155155 LX_CONFIG(CONFIG_SPARSEMEM)
156156 LX_CONFIG(CONFIG_SPARSEMEM_EXTREME)
157157 LX_CONFIG(CONFIG_SPARSEMEM_VMEMMAP)
scripts/gdb/linux/mm.py+172−1
@@ -26,8 +26,179 @@ class page_ops(): · 25 unmodified lines
2626 raise gdb.GdbError('Only support CONFIG_SPARSEMEM_VMEMMAP now')
2727 if constants.LX_CONFIG_ARM64 and utils.is_target_arch('aarch64'):
2828 self.ops = aarch64_page_ops()
29+ elif utils.is_target_arch('x86_64') or utils.is_target_arch('x86-64'):
30+ self.ops = x86_page_ops()
2931 else:
30− raise gdb.GdbError('Only support aarch64 now')
32+ raise gdb.GdbError('Only support aarch64 and x86_64 now')
33+
34+class x86_page_ops():
35+ def __init__(self):
36+ self.struct_page_size = utils.get_page_type().sizeof
37+ self.PAGE_SHIFT = constants.LX_CONFIG_PAGE_SHIFT
38+ self.PAGE_SIZE = 1 << self.PAGE_SHIFT
39+ self.PAGE_MASK = (~(self.PAGE_SIZE - 1)) & ((1 << 64) - 1)
40+
41+ self.PAGE_OFFSET = int(gdb.parse_and_eval("page_offset_base"))
42+ self.VMEMMAP_START = int(gdb.parse_and_eval("vmemmap_base"))
43+ self.PHYS_BASE = int(gdb.parse_and_eval("phys_base"))
44+ self.START_KERNEL_map = 0xffffffff80000000
45+
46+ self.KERNEL_START = gdb.parse_and_eval("_text")
47+ self.KERNEL_END = gdb.parse_and_eval("_end")
48+
49+ self.VMALLOC_START = int(gdb.parse_and_eval("vmalloc_base"))
50+ if self.VMALLOC_START == 0xffffc90000000000:
51+ self.VMALLOC_END = self.VMALLOC_START + (32 * 1024 * 1024 * 1024 * 1024) - 1
52+ elif self.VMALLOC_START == 0xffa0000000000000:
53+ self.VMALLOC_END = self.VMALLOC_START + (12800 * 1024 * 1024 * 1024 * 1024) - 1
54+ else:
55+ self.VMALLOC_END = self.VMALLOC_START + (12800 * 1024 * 1024 * 1024 * 1024) - 1
56+
57+ self.MAX_PHYSMEM_BITS = 46
58+ self.SECTION_SIZE_BITS = 27
59+ self.MAX_ORDER = 10
60+
61+ self.SECTIONS_SHIFT = self.MAX_PHYSMEM_BITS - self.SECTION_SIZE_BITS
62+ self.NR_MEM_SECTIONS = 1 << self.SECTIONS_SHIFT
63+ self.PFN_SECTION_SHIFT = self.SECTION_SIZE_BITS - self.PAGE_SHIFT
64+ self.PAGES_PER_SECTION = 1 << self.PFN_SECTION_SHIFT
65+ self.PAGE_SECTION_MASK = (~(self.PAGES_PER_SECTION - 1)) & ((1 << 64) - 1)
66+
67+ if constants.LX_CONFIG_SPARSEMEM_EXTREME:
68+ self.SECTIONS_PER_ROOT = self.PAGE_SIZE // gdb.lookup_type("struct mem_section").sizeof
69+ else:
70+ self.SECTIONS_PER_ROOT = 1
71+
72+ self.NR_SECTION_ROOTS = DIV_ROUND_UP(self.NR_MEM_SECTIONS, self.SECTIONS_PER_ROOT)
73+ self.SECTION_ROOT_MASK = self.SECTIONS_PER_ROOT - 1
74+
75+ try:
76+ self.SECTION_HAS_MEM_MAP = 1 << int(gdb.parse_and_eval('SECTION_HAS_MEM_MAP_BIT'))
77+ self.SECTION_IS_EARLY = 1 << int(gdb.parse_and_eval('SECTION_IS_EARLY_BIT'))
78+ except:
79+ self.SECTION_HAS_MEM_MAP = 1 << 0
80+ self.SECTION_IS_EARLY = 1 << 3
81+
82+ self.SUBSECTION_SHIFT = 21
83+ self.PAGES_PER_SUBSECTION = 1 << (self.SUBSECTION_SHIFT - self.PAGE_SHIFT)
84+
85+ if constants.LX_CONFIG_NUMA and constants.LX_CONFIG_NODES_SHIFT:
86+ self.NODE_SHIFT = constants.LX_CONFIG_NODES_SHIFT
87+ else:
88+ self.NODE_SHIFT = 0
89+
90+ self.MAX_NUMNODES = 1 << self.NODE_SHIFT
91+
92+ self.vmemmap = gdb.Value(self.VMEMMAP_START).cast(utils.get_page_type().pointer())
93+
94+ def kasan_reset_tag(self, addr):
95+ return addr
96+
97+ def SECTION_NR_TO_ROOT(self, sec):
98+ return sec // self.SECTIONS_PER_ROOT
99+
100+ def __nr_to_section(self, nr):
101+ root = self.SECTION_NR_TO_ROOT(nr)
102+ mem_section = gdb.parse_and_eval("mem_section")
103+ return mem_section[root][nr & self.SECTION_ROOT_MASK]
104+
105+ def pfn_to_section_nr(self, pfn):
106+ return pfn >> self.PFN_SECTION_SHIFT
107+
108+ def section_nr_to_pfn(self, sec):
109+ return sec << self.PFN_SECTION_SHIFT
110+
111+ def __pfn_to_section(self, pfn):
112+ return self.__nr_to_section(self.pfn_to_section_nr(pfn))
113+
114+ def pfn_to_section(self, pfn):
115+ return self.__pfn_to_section(pfn)
116+
117+ def subsection_map_index(self, pfn):
118+ return (pfn & ~(self.PAGE_SECTION_MASK)) // self.PAGES_PER_SUBSECTION
119+
120+ def pfn_section_valid(self, ms, pfn):
121+ if constants.LX_CONFIG_SPARSEMEM_VMEMMAP:
122+ idx = self.subsection_map_index(pfn)
123+ return test_bit(idx, ms['usage']['subsection_map'])
124+ else:
125+ return True
126+
127+ def valid_section(self, mem_section):
128+ if mem_section != None and (mem_section['section_mem_map'] & self.SECTION_HAS_MEM_MAP):
129+ return True
130+ return False
131+
132+ def early_section(self, mem_section):
133+ if mem_section != None and (mem_section['section_mem_map'] & self.SECTION_IS_EARLY):
134+ return True
135+ return False
136+
137+ def pfn_valid(self, pfn):
138+ ms = None
139+ if self.PHYS_PFN(self.PFN_PHYS(pfn)) != pfn:
140+ return False
141+ if self.pfn_to_section_nr(pfn) >= self.NR_MEM_SECTIONS:
142+ return False
143+ ms = self.__pfn_to_section(pfn)
144+
145+ if not self.valid_section(ms):
146+ return False
147+ return self.early_section(ms) or self.pfn_section_valid(ms, pfn)
148+
149+ def PFN_PHYS(self, pfn):
150+ return pfn << self.PAGE_SHIFT
151+
152+ def PHYS_PFN(self, phys):
153+ return phys >> self.PAGE_SHIFT
154+
155+ def __phys_to_virt(self, pa):
156+ return pa + self.PAGE_OFFSET
157+
158+ def __virt_to_phys(self, va):
159+ if va >= self.START_KERNEL_map:
160+ return va - self.START_KERNEL_map + self.PHYS_BASE
161+ else:
162+ return va - self.PAGE_OFFSET
163+
164+ def virt_to_phys(self, va):
165+ return self.__virt_to_phys(va)
166+
167+ def virt_to_page(self, va):
168+ return self.pfn_to_page(self.virt_to_pfn(va))
169+
170+ def __pa(self, va):
171+ return self.__virt_to_phys(va)
172+
173+ def __va(self, pa):
174+ return self.__phys_to_virt(pa)
175+
176+ def pfn_to_kaddr(self, pfn):
177+ return self.__va(pfn << self.PAGE_SHIFT)
178+
179+ def virt_to_pfn(self, va):
180+ return self.PHYS_PFN(self.__virt_to_phys(va))
181+
182+ def sym_to_pfn(self, x):
183+ return self.PHYS_PFN(self.__virt_to_phys(x))
184+
185+ def page_to_pfn(self, page):
186+ return int(page.cast(utils.get_page_type().pointer()) - self.vmemmap)
187+
188+ def pfn_to_page(self, pfn):
189+ return self.vmemmap + pfn
190+
191+ def page_to_phys(self, page):
192+ return self.PFN_PHYS(self.page_to_pfn(page))
193+
194+ def page_to_virt(self, page):
195+ return self.__va(self.page_to_phys(page))
196+
197+ def page_address(self, page):
198+ return self.page_to_virt(page)
199+
200+ def folio_address(self, folio):
201+ return self.page_address(folio['page'].address)
31202
32203 class aarch64_page_ops():
33204 def __init__(self):