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llvm-project/lld/test/COFF/pdb-safeseh.yaml

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[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
# RUN: yaml2obj %s -o %t.obj
# RUN: lld-link -debug -entry:main -out:%t.exe -pdb:%t.pdb %t.obj
[LLD/PDB] Write actual records to the globals stream. Previously we were writing an empty globals stream. Windows tools interpret this as "private symbols are not present in this PDB", even when they are, so we need to fix this. Regardless, without it we don't have information about global variables, so we need to fix it anyway. This patch does that. With this patch, the "lm" command in WinDbg correctly reports that we have private symbols available, but the "dv" command still refuses to display local variables. Differential Revision: https://reviews.llvm.org/D36535 llvm-svn: 310743
2017-08-12 03:00:03 +08:00
# RUN: llvm-pdbutil dump -globals %t.pdb | FileCheck %s
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
# There is an S_GDATA32 symbol record with .secrel32 and .secidx relocations in
# it in this debug info. This is similar to the relocations in the loadcfg.obj
# file in the MSVC CRT. We need to make sure that our relocation logic matches
# MSVC's for these absolute, linker-provided symbols.
[LLD/PDB] Write actual records to the globals stream. Previously we were writing an empty globals stream. Windows tools interpret this as "private symbols are not present in this PDB", even when they are, so we need to fix this. Regardless, without it we don't have information about global variables, so we need to fix it anyway. This patch does that. With this patch, the "lm" command in WinDbg correctly reports that we have private symbols available, but the "dv" command still refuses to display local variables. Differential Revision: https://reviews.llvm.org/D36535 llvm-svn: 310743
2017-08-12 03:00:03 +08:00
# CHECK: Global Symbols
# CHECK-NEXT: ============================================================
# CHECK-NEXT: Records
# CHECK-NEXT: 20 | S_GDATA32 [size = 40] `___safe_se_handler_table`
# CHECK-NEXT: type = 0x0022 (unsigned long), addr = 0003:0000
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
--- !COFF
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
header:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
Machine: IMAGE_FILE_MACHINE_I386
Characteristics: [ ]
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
sections:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
- Name: '.debug$S'
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
Subsections:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
- !Symbols
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
Records:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
- Kind: S_GDATA32
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
DataSym:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
Type: 34
DisplayName: ___safe_se_handler_table
- !StringTable
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
Strings:
Relocations:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
- VirtualAddress: 20
SymbolName: ___safe_se_handler_table
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 24
SymbolName: ___safe_se_handler_table
Type: IMAGE_REL_I386_SECTION
- Name: '.text$mn'
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 16
SectionData: 488D0500000000C3
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
Relocations:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
- VirtualAddress: 3
SymbolName: ___safe_se_handler_table
Type: IMAGE_REL_I386_REL32
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
symbols:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
- Name: '.debug$S'
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
SectionDefinition:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
Length: 372
NumberOfRelocations: 6
NumberOfLinenumbers: 0
CheckSum: 0
Number: 0
- Name: '.text$mn'
Value: 0
SectionNumber: 2
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
[llvm-pdbutil] Output the symbol offset when dumping. Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
2017-07-01 05:35:00 +08:00
SectionDefinition:
[COFF] Improve synthetic symbol handling Summary: The main change is that we can have SECREL and SECTION relocations against ___safe_se_handler_table, which is important for handling the debug info in the MSVCRT. Previously we were using DefinedRelative for __safe_se_handler_table and __ImageBase, and after we implement CFGuard, we plan to extend it to handle __guard_fids_table, __guard_longjmp_table, and more. However, DefinedRelative is really only suitable for implementing __ImageBase, because it lacks a Chunk, which you need in order to figure out the output section index and output section offset when resolving SECREl and SECTION relocations. This change renames DefinedRelative to DefinedSynthetic and gives it a Chunk. One wart is that __ImageBase doesn't have a chunk. It points to the PE header, effectively. We could split DefinedRelative and DefinedSynthetic if we think that's cleaner and creates fewer special cases. I also added safeseh.s, which checks that we don't emit a safe seh table entries pointing to garbage collected handlers and that we don't emit a table at all when there are no handlers. Reviewers: ruiu Reviewed By: ruiu Subscribers: inglorion, pcc, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D34577 llvm-svn: 306293
2017-06-26 23:39:52 +08:00
Length: 8
NumberOfRelocations: 1
NumberOfLinenumbers: 0
CheckSum: 1092178131
Number: 0
- Name: _main
Value: 0
SectionNumber: 2
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_FUNCTION
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
- Name: ___safe_se_handler_table
Value: 0
SectionNumber: 0
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
...