The PE/COFF spec describes an additional DllCharacteristics field
implemented as a debug directory entry, which carries flags related to
which control flow integrity (CFI) features are supported by the binary.
So let's add this entry when doing ELF to PE/COFF conversion - we will
add support for setting the flags in a subsequent patch.
Signed-off-by: Ard Biesheuvel <a...@kernel.org>
---
BaseTools/Source/C/GenFw/Elf64Convert.c | 54 +++++++++++++++-----
BaseTools/Source/C/GenFw/GenFw.c | 3 +-
BaseTools/Source/C/Include/IndustryStandard/PeImage.h | 13 ++++-
3 files changed, 55 insertions(+), 15 deletions(-)
diff --git a/BaseTools/Source/C/GenFw/Elf64Convert.c
b/BaseTools/Source/C/GenFw/Elf64Convert.c
index 2a810e835d4a4a66..9c17c90b16602421 100644
--- a/BaseTools/Source/C/GenFw/Elf64Convert.c
+++ b/BaseTools/Source/C/GenFw/Elf64Convert.c
@@ -992,6 +992,16 @@ ScanSections64 (
sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY) +
strlen(mInImageName) + 1;
+ //
+ // Add more space in the .debug data region for the DllCharacteristicsEx
+ // field.
+ //
+ if (mDllCharacteristicsEx != 0) {
+ mCoffOffset = DebugRvaAlign(mCoffOffset) +
+ sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY) +
+ sizeof (EFI_IMAGE_DEBUG_EX_DLLCHARACTERISTICS_ENTRY);
+ }
+
mCoffOffset = CoffAlign(mCoffOffset);
if (SectionCount == 0) {
mDataOffset = mCoffOffset;
@@ -2244,29 +2254,47 @@ WriteDebug64 (
VOID
)
{
- UINT32 Len;
- EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
- EFI_IMAGE_DATA_DIRECTORY *DataDir;
- EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *Dir;
- EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY *Nb10;
+ UINT32 Len;
+ EFI_IMAGE_OPTIONAL_HEADER_UNION *NtHdr;
+ EFI_IMAGE_DATA_DIRECTORY *DataDir;
+ EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *Dir;
+ EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY *Nb10;
+ EFI_IMAGE_DEBUG_EX_DLLCHARACTERISTICS_ENTRY *DllEntry;
Len = strlen(mInImageName) + 1;
+ NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
+ DataDir =
&NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG];
+ DataDir->VirtualAddress = mDebugOffset;
+ DataDir->Size = sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
+
Dir = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY*)(mCoffFile + mDebugOffset);
+
+ if (mDllCharacteristicsEx != 0) {
+ DataDir->Size += sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
+
+ Dir->Type = EFI_IMAGE_DEBUG_TYPE_EX_DLLCHARACTERISTICS;
+ Dir->SizeOfData = sizeof (EFI_IMAGE_DEBUG_EX_DLLCHARACTERISTICS_ENTRY);
+ Dir->FileOffset = mDebugOffset + DataDir->Size +
+ sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY) +
+ DebugRvaAlign(Len);
+ Dir->RVA = Dir->FileOffset;
+
+ DllEntry = (VOID *)(mCoffFile + Dir->FileOffset);
+
+ DllEntry->DllCharacteristicsEx = mDllCharacteristicsEx;
+
+ Dir++;
+ }
+
Dir->Type = EFI_IMAGE_DEBUG_TYPE_CODEVIEW;
Dir->SizeOfData = sizeof(EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY) + Len;
- Dir->RVA = mDebugOffset + sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
- Dir->FileOffset = mDebugOffset + sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
+ Dir->RVA = mDebugOffset + DataDir->Size;
+ Dir->FileOffset = mDebugOffset + DataDir->Size;
Nb10 = (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY*)(Dir + 1);
Nb10->Signature = CODEVIEW_SIGNATURE_NB10;
strcpy ((char *)(Nb10 + 1), mInImageName);
-
-
- NtHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)(mCoffFile + mNtHdrOffset);
- DataDir =
&NtHdr->Pe32Plus.OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG];
- DataDir->VirtualAddress = mDebugOffset;
- DataDir->Size = sizeof(EFI_IMAGE_DEBUG_DIRECTORY_ENTRY);
}
STATIC
diff --git a/BaseTools/Source/C/GenFw/GenFw.c b/BaseTools/Source/C/GenFw/GenFw.c
index 6f61f16788cd2a0a..d0e52ccc26431380 100644
--- a/BaseTools/Source/C/GenFw/GenFw.c
+++ b/BaseTools/Source/C/GenFw/GenFw.c
@@ -2932,7 +2932,8 @@ Routine Description:
if (mIsConvertXip) {
DebugEntry->FileOffset = DebugEntry->RVA;
}
- if (ZeroDebugFlag || DebugEntry->Type != EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {
+ if ((ZeroDebugFlag || DebugEntry->Type != EFI_IMAGE_DEBUG_TYPE_CODEVIEW)
&&
+ (DebugEntry->Type != EFI_IMAGE_DEBUG_TYPE_EX_DLLCHARACTERISTICS)) {
memset (FileBuffer + DebugEntry->FileOffset, 0,
DebugEntry->SizeOfData);
memset (DebugEntry, 0, sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY));
}
diff --git a/BaseTools/Source/C/Include/IndustryStandard/PeImage.h
b/BaseTools/Source/C/Include/IndustryStandard/PeImage.h
index 77ded3f611398278..5e9428ab98c7f68a 100644
--- a/BaseTools/Source/C/Include/IndustryStandard/PeImage.h
+++ b/BaseTools/Source/C/Include/IndustryStandard/PeImage.h
@@ -615,7 +615,8 @@ typedef struct {
///
/// Debug Format
///
-#define EFI_IMAGE_DEBUG_TYPE_CODEVIEW 2
+#define EFI_IMAGE_DEBUG_TYPE_CODEVIEW 2
+#define EFI_IMAGE_DEBUG_TYPE_EX_DLLCHARACTERISTICS 20
typedef struct {
UINT32 Characteristics;
@@ -664,6 +665,16 @@ typedef struct {
//
} EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY;
+///
+/// Extended DLL Characteristics
+///
+#define EFI_IMAGE_DLLCHARACTERISTICS_EX_CET_COMPAT 0x0001
+#define EFI_IMAGE_DLLCHARACTERISTICS_EX_FORWARD_CFI_COMPAT 0x0040
+
+typedef struct {
+ UINT16 DllCharacteristicsEx;
+} EFI_IMAGE_DEBUG_EX_DLLCHARACTERISTICS_ENTRY;
+
//
// .pdata entries for X64
//
--
2.39.2
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#101938): https://edk2.groups.io/g/devel/message/101938
Mute This Topic: https://groups.io/mt/97879300/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
