mstorsjo created this revision.
mstorsjo added reviewers: labath, amccarth.
Herald added a subscriber: kristof.beyls.
Herald added a project: LLDB.
Windows on arm always uses thumb mode, and doesn't have most of the mechanisms
that are used in e.g. ELF for distinguishing between arm and thumb.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D70796
Files:
lldb/source/Utility/ArchSpec.cpp
lldb/test/Shell/ObjectFile/PECOFF/disassemble-thumb.yaml
Index: lldb/test/Shell/ObjectFile/PECOFF/disassemble-thumb.yaml
===================================================================
--- /dev/null
+++ lldb/test/Shell/ObjectFile/PECOFF/disassemble-thumb.yaml
@@ -0,0 +1,92 @@
+# RUN: yaml2obj %s > %t.exe
+# RUN: %lldb %t.exe -o "disassemble -b -n entry" -b | FileCheck %s
+
+# CHECK: {{.*}}.exe[0x401000] <+0>: 0x0040 lsls r0, r0, #0x1
+# CHECK: {{.*}}.exe[0x401002] <+2>: 0x4770 bx lr
+
+--- !COFF
+OptionalHeader:
+ AddressOfEntryPoint: 4097
+ ImageBase: 4194304
+ SectionAlignment: 4096
+ FileAlignment: 512
+ MajorOperatingSystemVersion: 6
+ MinorOperatingSystemVersion: 0
+ MajorImageVersion: 0
+ MinorImageVersion: 0
+ MajorSubsystemVersion: 6
+ MinorSubsystemVersion: 0
+ Subsystem: IMAGE_SUBSYSTEM_WINDOWS_CUI
+ DLLCharacteristics: [ IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE, IMAGE_DLL_CHARACTERISTICS_NX_COMPAT, IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE ]
+ SizeOfStackReserve: 1048576
+ SizeOfStackCommit: 4096
+ SizeOfHeapReserve: 1048576
+ SizeOfHeapCommit: 4096
+ ExportTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ImportTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ResourceTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ExceptionTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ CertificateTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ BaseRelocationTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ Debug:
+ RelativeVirtualAddress: 0
+ Size: 0
+ Architecture:
+ RelativeVirtualAddress: 0
+ Size: 0
+ GlobalPtr:
+ RelativeVirtualAddress: 0
+ Size: 0
+ TlsTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ LoadConfigTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ BoundImport:
+ RelativeVirtualAddress: 0
+ Size: 0
+ IAT:
+ RelativeVirtualAddress: 0
+ Size: 0
+ DelayImportDescriptor:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ClrRuntimeHeader:
+ RelativeVirtualAddress: 0
+ Size: 0
+header:
+ Machine: IMAGE_FILE_MACHINE_ARMNT
+ Characteristics: [ IMAGE_FILE_EXECUTABLE_IMAGE, IMAGE_FILE_32BIT_MACHINE ]
+sections:
+ - Name: .text
+ Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
+ VirtualAddress: 4096
+ VirtualSize: 4
+ SectionData: '40007047'
+symbols:
+ - Name: .text
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_NULL
+ StorageClass: IMAGE_SYM_CLASS_STATIC
+ - Name: entry
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_FUNCTION
+ StorageClass: IMAGE_SYM_CLASS_EXTERNAL
+...
Index: lldb/source/Utility/ArchSpec.cpp
===================================================================
--- lldb/source/Utility/ArchSpec.cpp
+++ lldb/source/Utility/ArchSpec.cpp
@@ -1443,6 +1443,9 @@
GetCore() == ArchSpec::Core::eCore_thumbv6m) {
return true;
}
+ // Windows on ARM is always thumb.
+ if (GetTriple().isOSWindows())
+ return true;
}
return false;
}
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