[RISCV] Support .note.gnu.property for enable Zicfiss and Zicfilp extension #77414
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You can test this locally with the following command:git-clang-format --diff db78ee0cb82669302a5e0f18a15fd53346a73823 e01a93cb192e71947f693bdd07d534912e54fbef -- clang/test/Driver/riscv-cfi-property.c lld/ELF/Config.h lld/ELF/Driver.cpp lld/ELF/InputFiles.cpp lld/ELF/SyntheticSections.cpp llvm/include/llvm/BinaryFormat/ELF.h llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h llvm/lib/Target/RISCV/MCTargetDesc/RISCVTargetStreamer.cpp llvm/lib/Target/RISCV/MCTargetDesc/RISCVTargetStreamer.h llvm/tools/llvm-readobj/ELFDumper.cppView the diff from clang-format here.diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index 182ca6d4df..8b1845fba7 100644
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -2697,7 +2697,8 @@ static void readSecurityNotes() {
"GNU_PROPERTY_X86_FEATURE_1_SHSTK property");
checkAndReportMissingFeature(
- config->zZicfilpReport, features, GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE,
+ config->zZicfilpReport, features,
+ GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE,
toString(f) + ": -z zicfilp-report: file does not have "
"GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE property");
@@ -2723,8 +2724,9 @@ static void readSecurityNotes() {
!(features & GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE)) {
features |= GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE;
if (config->zZicfilpReport == "none")
- warn(toString(f) + ": -z force-zicfilp: file does not have "
- "GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE property");
+ warn(toString(f) +
+ ": -z force-zicfilp: file does not have "
+ "GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_SIMPLE property");
}
if (config->zForceZicfiss &&
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This was referenced Jan 9, 2024
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@llvm/pr-subscribers-lld-elf @llvm/pr-subscribers-backend-risc-v Author: None (SuHo-llrr) ChangesEmit Zicfiss/Zicfilp to .note.gnu.property sections
Ref: riscv-non-isa/riscv-elf-psabi-doc#417 Patch is 20.21 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/77414.diff 10 Files Affected:
diff --git a/clang/test/Driver/riscv-cfi-property.c b/clang/test/Driver/riscv-cfi-property.c
new file mode 100644
index 00000000000000..7a4044c9328dc4
--- /dev/null
+++ b/clang/test/Driver/riscv-cfi-property.c
@@ -0,0 +1,29 @@
+// When -march with zicfiss0p4 or zicfilp0p4 add GNU property to file object
+
+// RUN: %clang --target=riscv32-linux-gnu -menable-experimental-extensions -march=rv32gc_zicfiss0p4 -c -o - %s | llvm-readobj -n - | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFISS %s
+// RUN: %clang --target=riscv64-linux-gnu -menable-experimental-extensions -march=rv64gc_zicfiss0p4 -c -o - %s | llvm-readobj -n - | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFISS %s
+// RUN: %clang --target=riscv32-linux-gnu -menable-experimental-extensions -march=rv32gc_zicfilp0p4 -c -o - %s | llvm-readobj -n - | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP %s
+// RUN: %clang --target=riscv64-linux-gnu -menable-experimental-extensions -march=rv64gc_zicfilp0p4 -c -o - %s | llvm-readobj -n - | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP %s
+// RUN: %clang --target=riscv32-linux-gnu -menable-experimental-extensions -march=rv32gc_zicfilp0p4_zicfiss0p4 -c -o - %s | llvm-readobj -n - | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP_ZICFISS %s
+// RUN: %clang --target=riscv64-linux-gnu -menable-experimental-extensions -march=rv64gc_zicfilp0p4_zicfiss0p4 -c -o - %s | llvm-readobj -n - | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP_ZICFISS %s
+
+
+// CHECK: Name: .note.gnu.property
+// CHECK: Type: NT_GNU_PROPERTY_TYPE_0
+// CHECK: Property [
+// CHECK_ZICFISS: riscv feature: ZICFISS
+// CHECK_ZICFILP: riscv feature: ZICFILP
+// CHECK_ZICFILP_ZICFISS: riscv feature: ZICFILP, ZICFISS
+// CHECK: ]
+
+// GNU Note Section Example
+/*.section .note.gnu.property, "a";
+.balign 8;
+.long 0x4;
+.long 0x10;
+.long 0x5
+.asciz "GNU"
+.long 0xc0000000
+.long 4
+.long 3
+.long 0*/
diff --git a/lld/ELF/Config.h b/lld/ELF/Config.h
index fcca8c42b29b71..552a5060452729 100644
--- a/lld/ELF/Config.h
+++ b/lld/ELF/Config.h
@@ -187,6 +187,8 @@ struct Config {
llvm::StringRef cmseOutputLib;
StringRef zBtiReport = "none";
StringRef zCetReport = "none";
+ llvm::StringRef zZicfilpReport = "none";
+ llvm::StringRef zZicfissReport = "none";
bool ltoBBAddrMap;
llvm::StringRef ltoBasicBlockSections;
std::pair<llvm::StringRef, llvm::StringRef> thinLTOObjectSuffixReplace;
@@ -324,6 +326,8 @@ struct Config {
bool zText;
bool zRetpolineplt;
bool zWxneeded;
+ bool zForceZicfilp;
+ bool zForceZicfiss;
DiscardPolicy discard;
GnuStackKind zGnustack;
ICFLevel icf;
diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index 4bb9b7a0b2a983..1791d275a4d00c 100644
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -463,6 +463,13 @@ static void checkOptions() {
error("-z bti-report only supported on AArch64");
}
+ if (config->emachine != EM_RISCV) {
+ if (config->zZicfilpReport != "none")
+ error("-z zicfilip-report only support on RISCV32/RISCV64");
+ if (config->zZicfissReport != "none")
+ error("-z zicfiss-report only support on RISCV32/RISCV64");
+ }
+
if (config->emachine != EM_386 && config->emachine != EM_X86_64 &&
config->zCetReport != "none")
error("-z cet-report only supported on X86 and X86_64");
@@ -1455,6 +1462,8 @@ static void readConfigs(opt::InputArgList &args) {
config->zWxneeded = hasZOption(args, "wxneeded");
setUnresolvedSymbolPolicy(args);
config->power10Stubs = args.getLastArgValue(OPT_power10_stubs_eq) != "no";
+ config->zForceZicfilp = hasZOption(args, "force-zicfilp");
+ config->zForceZicfiss = hasZOption(args, "force-zicfiss");
if (opt::Arg *arg = args.getLastArg(OPT_eb, OPT_el)) {
if (arg->getOption().matches(OPT_eb))
@@ -1497,7 +1506,9 @@ static void readConfigs(opt::InputArgList &args) {
}
auto reports = {std::make_pair("bti-report", &config->zBtiReport),
- std::make_pair("cet-report", &config->zCetReport)};
+ std::make_pair("cet-report", &config->zCetReport),
+ std::make_pair("zicfilp-report", &config->zZicfilpReport),
+ std::make_pair("zicfiss-report", &config->zZicfissReport)};
for (opt::Arg *arg : args.filtered(OPT_z)) {
std::pair<StringRef, StringRef> option =
StringRef(arg->getValue()).split('=');
@@ -2570,7 +2581,7 @@ static void checkAndReportMissingFeature(StringRef config, uint32_t features,
// GNU_PROPERTY_AARCH64_FEATURE_1_AND mechanism.
static uint32_t getAndFeatures() {
if (config->emachine != EM_386 && config->emachine != EM_X86_64 &&
- config->emachine != EM_AARCH64)
+ config->emachine != EM_AARCH64 && config->emachine != EM_RISCV)
return 0;
uint32_t ret = -1;
@@ -2592,6 +2603,16 @@ static uint32_t getAndFeatures() {
toString(f) + ": -z cet-report: file does not have "
"GNU_PROPERTY_X86_FEATURE_1_SHSTK property");
+ checkAndReportMissingFeature(
+ config->zZicfilpReport, features, GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP,
+ toString(f) + ": -z zicfilp-report: file does not have "
+ "GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP property");
+
+ checkAndReportMissingFeature(
+ config->zZicfissReport, features, GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS,
+ toString(f) + ": -z zicfiss-report: file does not have "
+ "GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS property");
+
if (config->zForceBti && !(features & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)) {
features |= GNU_PROPERTY_AARCH64_FEATURE_1_BTI;
if (config->zBtiReport == "none")
@@ -2604,6 +2625,23 @@ static uint32_t getAndFeatures() {
"GNU_PROPERTY_X86_FEATURE_1_IBT property");
features |= GNU_PROPERTY_X86_FEATURE_1_IBT;
}
+
+ if (config->zForceZicfilp &&
+ !(features & GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP)) {
+ features |= GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP;
+ if (config->zZicfilpReport == "none")
+ warn(toString(f) + ": -z force-zicfilp: file does not have "
+ "GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP property");
+ }
+
+ if (config->zForceZicfiss &&
+ !(features & GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS)) {
+ features |= GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS;
+ if (config->zZicfissReport == "none")
+ warn(toString(f) + ": -z force-zicfiss: file does not have "
+ "GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS property");
+ }
+
if (config->zPacPlt && !(features & GNU_PROPERTY_AARCH64_FEATURE_1_PAC)) {
warn(toString(f) + ": -z pac-plt: file does not have "
"GNU_PROPERTY_AARCH64_FEATURE_1_PAC property");
diff --git a/lld/ELF/InputFiles.cpp b/lld/ELF/InputFiles.cpp
index 00aebb47640e84..5324c7b95935a8 100644
--- a/lld/ELF/InputFiles.cpp
+++ b/lld/ELF/InputFiles.cpp
@@ -926,9 +926,18 @@ template <class ELFT> static uint32_t readAndFeatures(const InputSection &sec) {
continue;
}
- uint32_t featureAndType = config->emachine == EM_AARCH64
- ? GNU_PROPERTY_AARCH64_FEATURE_1_AND
- : GNU_PROPERTY_X86_FEATURE_1_AND;
+ uint32_t featureAndType = 0;
+ switch (config->emachine) {
+ default:
+ featureAndType = GNU_PROPERTY_X86_FEATURE_1_AND;
+ break;
+ case EM_AARCH64:
+ featureAndType = GNU_PROPERTY_AARCH64_FEATURE_1_AND;
+ break;
+ case EM_RISCV:
+ featureAndType = GNU_PROPERTY_RISCV_FEATURE_1_AND;
+ break;
+ }
// Read a body of a NOTE record, which consists of type-length-value fields.
ArrayRef<uint8_t> desc = note.getDesc(sec.addralign);
diff --git a/lld/ELF/SyntheticSections.cpp b/lld/ELF/SyntheticSections.cpp
index bada394aa30d7d..1065e5c5be6e14 100644
--- a/lld/ELF/SyntheticSections.cpp
+++ b/lld/ELF/SyntheticSections.cpp
@@ -314,9 +314,18 @@ GnuPropertySection::GnuPropertySection()
config->wordsize, ".note.gnu.property") {}
void GnuPropertySection::writeTo(uint8_t *buf) {
- uint32_t featureAndType = config->emachine == EM_AARCH64
- ? GNU_PROPERTY_AARCH64_FEATURE_1_AND
- : GNU_PROPERTY_X86_FEATURE_1_AND;
+ uint32_t featureAndType = 0;
+ switch (config->emachine) {
+ default:
+ featureAndType = GNU_PROPERTY_X86_FEATURE_1_AND;
+ break;
+ case EM_AARCH64:
+ featureAndType = GNU_PROPERTY_AARCH64_FEATURE_1_AND;
+ break;
+ case EM_RISCV:
+ featureAndType = GNU_PROPERTY_RISCV_FEATURE_1_AND;
+ break;
+ }
write32(buf, 4); // Name size
write32(buf + 4, config->is64 ? 16 : 12); // Content size
diff --git a/lld/test/ELF/riscv-force-cfi-property.s b/lld/test/ELF/riscv-force-cfi-property.s
new file mode 100644
index 00000000000000..65043d1e71261e
--- /dev/null
+++ b/lld/test/ELF/riscv-force-cfi-property.s
@@ -0,0 +1,35 @@
+# REQUIRES: riscv
+
+# RUN: llvm-mc -filetype=obj -triple=riscv32-unknown-elf %s -o %t.rv32_lp.o
+# RUN: ld.lld %t.rv32_lp.o -zforce-zicfilp -o %t.rv32_lp | count 0
+# RUN: llvm-readobj -n %t.rv32_lp | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP %s
+
+# RUN: llvm-mc -filetype=obj -triple=riscv64-unknown-elf %s -o %t.rv64_lp.o
+# RUN: ld.lld %t.rv64_lp.o -zforce-zicfilp -o %t.rv64_lp | count 0
+# RUN: llvm-readobj -n %t.rv64_lp | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP %s
+
+# RUN: llvm-mc -filetype=obj -triple=riscv32-unknown-elf %s -o %t.rv32_ss.o
+# RUN: ld.lld %t.rv32_ss.o -zforce-zicfiss -o %t.rv32_ss | count 0
+# RUN: llvm-readobj -n %t.rv32_ss | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFISS %s
+
+# RUN: llvm-mc -filetype=obj -triple=riscv64-unknown-elf %s -o %t.rv64_ss.o
+# RUN: ld.lld %t.rv64_ss.o -zforce-zicfiss -o %t.rv64_ss | count 0
+# RUN: llvm-readobj -n %t.rv64_ss | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFISS %s
+
+# RUN: llvm-mc -filetype=obj -triple=riscv32-unknown-elf %s -o %t.rv32_lp_ss.o
+# RUN: ld.lld %t.rv32_lp_ss.o -zforce-zicfilp -zforce-zicfiss -o %t.rv32_lp_ss | count 0
+# RUN: llvm-readobj -n %t.rv32_lp_ss | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP_ZICFISS %s
+
+# RUN: llvm-mc -filetype=obj -triple=riscv64-unknown-elf %s -o %t.rv64_lp_ss.o
+# RUN: ld.lld %t.rv64_lp_ss.o -zforce-zicfilp -zforce-zicfiss -o %t.rv64_lp_ss | count 0
+# RUN: llvm-readobj -n %t.rv64_lp_ss | FileCheck -check-prefix=CHECK -check-prefix=CHECK_ZICFILP_ZICFISS %s
+
+
+
+// CHECK: Name: .note.gnu.property
+// CHECK: Type: NT_GNU_PROPERTY_TYPE_0
+// CHECK: Property [
+// CHECK_ZICFISS: riscv feature: ZICFISS
+// CHECK_ZICFILP: riscv feature: ZICFILP
+// CHECK_ZICFILP_ZICFISS: riscv feature: ZICFILP, ZICFISS
+// CHECK: ]
diff --git a/llvm/include/llvm/BinaryFormat/ELF.h b/llvm/include/llvm/BinaryFormat/ELF.h
index 8e0356a8efeb61..34c6a2690cbf3f 100644
--- a/llvm/include/llvm/BinaryFormat/ELF.h
+++ b/llvm/include/llvm/BinaryFormat/ELF.h
@@ -1737,6 +1737,7 @@ enum : unsigned {
GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000,
GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002,
+ GNU_PROPERTY_RISCV_FEATURE_1_AND = 0xc0000000,
GNU_PROPERTY_X86_UINT32_OR_LO = 0xc0008000,
GNU_PROPERTY_X86_FEATURE_2_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 1,
@@ -1776,6 +1777,12 @@ enum : unsigned {
GNU_PROPERTY_X86_ISA_1_V4 = 1 << 3,
};
+// riscv processor feature bits.
+enum : unsigned {
+ GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP = 1 << 0,
+ GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS = 1 << 1,
+};
+
// FreeBSD note types.
enum {
NT_FREEBSD_ABI_TAG = 1,
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
index b375e8bb4b8fac..ef1d86624b771d 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
@@ -84,6 +84,35 @@ void RISCVTargetELFStreamer::finishAttributeSection() {
ELF::SHT_RISCV_ATTRIBUTES, AttributeSection);
}
+void RISCVTargetELFStreamer::emitNoteSection(unsigned Flags) {
+ if (Flags == 0)
+ return;
+
+ MCStreamer &OutStreamer = getStreamer();
+ MCContext &Context = OutStreamer.getContext();
+ MCSectionELF *Nt = Context.getELFSection(".note.gnu.property", ELF::SHT_NOTE,
+ ELF::SHF_ALLOC);
+ MCSection *Cur = OutStreamer.getCurrentSectionOnly();
+ OutStreamer.switchSection(Nt);
+
+ // Emit the note header.
+ OutStreamer.emitValueToAlignment(Align(8));
+ OutStreamer.emitIntValue(4, 4); // data size for note name
+ OutStreamer.emitIntValue(4 * 4, 4); // data size
+ OutStreamer.emitIntValue(ELF::NT_GNU_PROPERTY_TYPE_0, 4); // note type
+ OutStreamer.emitBytes(StringRef("GNU", 4)); // note name
+
+ // Emit the CFI(ZICFILP/ZICFISS) properties.
+ OutStreamer.emitIntValue(ELF::GNU_PROPERTY_RISCV_FEATURE_1_AND,
+ 4); // and property
+ OutStreamer.emitIntValue(4, 4); // data size
+ OutStreamer.emitIntValue(Flags, 4); // data
+ OutStreamer.emitIntValue(0, 4); // pad
+
+ OutStreamer.endSection(Nt);
+ OutStreamer.switchSection(Cur);
+}
+
void RISCVTargetELFStreamer::finish() {
RISCVTargetStreamer::finish();
MCAssembler &MCA = getStreamer().getAssembler();
@@ -118,6 +147,20 @@ void RISCVTargetELFStreamer::finish() {
}
MCA.setELFHeaderEFlags(EFlags);
+
+ unsigned GNUNoteFlags = 0;
+
+ // TODO check ZICFILP or ZICFISS with march
+ // should we check with codegen enable ex. -mllvm
+ // -riscv-hardware-shadow-stack=true ?
+ const FeatureBitset &Features = STI.getFeatureBits();
+ if (Features[RISCV::FeatureStdExtZicfilp])
+ GNUNoteFlags |= ELF::GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP;
+
+ if (Features[RISCV::FeatureStdExtZicfiss])
+ GNUNoteFlags |= ELF::GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS;
+
+ emitNoteSection(GNUNoteFlags);
}
void RISCVTargetELFStreamer::reset() {
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
index a6f54bf67b5d2b..595dc777c30c4a 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
@@ -71,6 +71,7 @@ class RISCVTargetELFStreamer : public RISCVTargetStreamer {
void emitDirectiveVariantCC(MCSymbol &Symbol) override;
void finish() override;
+ void emitNoteSection(unsigned Flags);
};
MCELFStreamer *createRISCVELFStreamer(MCContext &C,
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index 50ea63e87a43be..a6840b6370ed5b 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -5094,7 +5094,7 @@ template <class ELFT> void GNUELFDumper<ELFT>::printAddrsig() {
template <typename ELFT>
static std::string getGNUProperty(uint32_t Type, uint32_t DataSize,
- ArrayRef<uint8_t> Data) {
+ ArrayRef<uint8_t> Data, uint16_t Target) {
std::string str;
raw_string_ostream OS(str);
uint32_t PrData;
@@ -5127,8 +5127,16 @@ static std::string getGNUProperty(uint32_t Type, uint32_t DataSize,
return OS.str();
case GNU_PROPERTY_AARCH64_FEATURE_1_AND:
case GNU_PROPERTY_X86_FEATURE_1_AND:
- OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: "
- : "x86 feature: ");
+
+ if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) {
+ if (Target == ELF::EM_RISCV)
+ OS << "riscv feature: ";
+ else
+ OS << "aarch64 feature: ";
+ } else {
+ OS << "x86 feature: ";
+ }
+
if (DataSize != 4) {
OS << format("<corrupt length: 0x%x>", DataSize);
return OS.str();
@@ -5138,14 +5146,21 @@ static std::string getGNUProperty(uint32_t Type, uint32_t DataSize,
OS << "<None>";
return OS.str();
}
+
if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) {
- DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI");
- DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC");
- DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_GCS, "GCS");
+ if (Target == ELF::EM_RISCV) {
+ DumpBit(GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP, "ZICFILP");
+ DumpBit(GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS, "ZICFISS");
+ } else {
+ DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI");
+ DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC");
+ DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_GCS, "GCS");
+ }
} else {
DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT");
DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK");
}
+
if (PrData)
OS << format("<unknown flags: 0x%x>", PrData);
return OS.str();
@@ -5199,7 +5214,8 @@ static std::string getGNUProperty(uint32_t Type, uint32_t DataSize,
}
template <typename ELFT>
-static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) {
+static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr,
+ uint16_t Target) {
using Elf_Word = typename ELFT::Word;
SmallVector<std::string, 4> Properties;
@@ -5217,8 +5233,8 @@ static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) {
Properties.push_back(OS.str());
break;
}
- Properties.push_back(
- getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize)));
+ Properties.push_back(getGNUProperty<ELFT>(
+ Type, DataSize, Arr.take_front(PaddedSize), Target));
Arr = Arr.drop_front(PaddedSize);
}
@@ -5270,7 +5286,7 @@ static StringRef getDescAsStringRef(ArrayRef<uint8_t> Desc) {
template <typename ELFT>
static bool printGNUNote(raw_ostream &OS, uint32_t NoteType,
- ArrayRef<uint8_t> Desc) {
+ ArrayRef<uint8_t> Desc, uint16_t Target) {
// Return true if we were able to pretty-print the note, false otherwise.
switch (NoteType) {
default:
@@ -5292,7 +5308,7 @@ static bool printGNUNote(raw_ostream &OS, uint32_t NoteType,
break;
case ELF::NT_GNU_PROPERTY_TYPE_0:
OS << " Properties:";
- for (const std::string &Property : getGNUPropertyList<ELFT>(Desc))
+ for (const std::string &Property : getGNUPropertyList<ELFT>(Desc, Target))
OS << " " << Property << "\n";
break;
}
@@ -6012,10 +6028,12 @@ template <class ELFT> void GNUELFDumper<ELFT>::printNotes() {
else
OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n";
+ uint16_t Target = this->Obj.getHeader().e_machine;
+
// Print the description, or fallback to printing raw bytes for unknown
// owners/if we fail to pretty-print the contents.
if (Name == "GNU") {
- if (printGNUNote<ELFT>(OS, Type, Descriptor))
+ if (printGNUNote<ELFT>(OS, Type, Descriptor, Target))
return Error::success();
} else if (Name == "FreeBSD") {
if (std::optional<FreeBSDNote> N =
@@ -7642,7 +7660,7 @@ template <class ELFT> void LLVMELFDumper<ELFT>::printAddrsig() {
template <typename ELFT>
static bool printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc,
- ScopedPrinter &W) {
+ ScopedPrinter &W, uint16_t Target) {
// Return true if we were able to pretty-print the note, false otherwise.
switch (NoteType) {
default:
@@ -7667,7 +7685,7 @@ static bool printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc,
break;
case ELF::NT_GNU_PROPERTY_TYPE_0:
ListScope D(W, "Property");
- for (const std::string &Property : getGNUPropertyList<ELFT>(Desc))
+ for (const std::string &Property : getGNUPropertyList<ELFT>(Desc, Target))
W.printString(Property);
break;
}
@@ -7803,10 +7821,11 @@ template <class ELFT> void LLVMELFDumper<ELFT>::printNotes() {
W.printString("Type",
"Unknown (" + to_string(format_hex(Type, 10)) + ")");
+ uint16_t Target = this->Obj.getHeader().e_machine;
// Print the description, or fallback to printing raw bytes for unknown
// owners/if we fail to pretty-print the contents.
if (Name == "GNU") {
- if (printGNUNote...
[truncated]
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@yetingk |
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yetingk
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|
I am sorry that I missed the commit for a long time. Very sorry about it. |
topperc
reviewed
May 10, 2024
| OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: " | ||
| : "x86 feature: "); | ||
|
|
||
| if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { |
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Add a static_assert that GNU_PROPERTY_AARCH64_FEATURE_1_AND and GNU_PROPERTY_RISCV_FEATURE_1_AND have the same value.
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Add static_assert when I use GNU_PROPERTY_AARCH64_FEATURE_1_AND to check
Thanks
|
Unless Otherwise (a) with just a |
MaskRay
reviewed
May 10, 2024
| @@ -0,0 +1,29 @@ | |||
| // When -march with zicfiss0p4 or zicfilp0p4 add GNU property to file object | |||
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This directory is for driver tests. Codegen tests should use %clang_cc1 and be moved elsewhere (e.g. test/CodeGen)
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I should only test in llvm-readobj not in Driver
Thanks
Are you saying that lld changes should be a different PR? |
jrtc27
reviewed
May 10, 2024
|
|
||
| unsigned GNUNoteFlags = 0; | ||
|
|
||
| // check ZICFILP or ZICFISS with features |
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Not sure this adds anything, but if it's staying please properly style it (e.g. start with a capital letter)
| unsigned GNUNoteFlags = 0; | ||
|
|
||
| // check ZICFILP or ZICFISS with features | ||
| // TODO should we check with codegen enable ex. -mllvm |
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This seems like it should be resolved before merging?
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Yes, I think we shouldn't just check if there is CFI extension is on,
we should also check if the codegen options are really enabled.
Ex. following code in RISCVFrameLowering
@yetingk Do you think so?
if (!STI.hasForcedSWShadowStack() && STI.hasStdExtZicfiss()) {
BuildMI(MBB, MI, DL, TII->get(RISCV::SSPUSH)).addReg(RAReg);
return;
}
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@SuHo-llrr shadow stack depends on -fsanitize=shadow-call-stack. I think you need to also check this.
| @@ -85,6 +85,35 @@ void RISCVTargetELFStreamer::finishAttributeSection() { | |||
| ELF::SHT_RISCV_ATTRIBUTES, AttributeSection); | |||
| } | |||
|
|
|||
| void RISCVTargetELFStreamer::emitNoteSection(unsigned Flags) { | |||
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I know this is what AArch64 calls it, but it's a very vague name that could cover any number of note sections. Can we do better and make ours specific to what it's actually doing, i.e. something about it being a GNU properties note?
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I think you are right, I should split lld Part to different PR, Thanks. |
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| @@ -331,6 +333,8 @@ struct Config { | |||
| bool zText; | |||
| bool zRetpolineplt; | |||
| bool zWxneeded; | |||
| bool zForceZicfilp; | |||
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I'm not sure if using bool here is suitable now. Currently, we have a second PLT scheme for Zicfilp: the function-signature-based one at riscv-non-isa/riscv-elf-psabi-doc#434 , so in the foreseeable future, this field would likely to be changed to an enum.
| @@ -85,6 +85,37 @@ void RISCVTargetELFStreamer::finishAttributeSection() { | |||
| ELF::SHT_RISCV_ATTRIBUTES, AttributeSection); | |||
| } | |||
|
|
|||
| void RISCVTargetELFStreamer::emitGNUProgramProperties(unsigned Flags) { | |||
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Change the name of Flags to AndFlags: Although currently only the AND flag is used, the .note.gnu.property section actually defines more flags besides the AND one, so if you're emitting the whole section with this function (as indicated by the function name), you should be clear about what flag of the section you're emitting.
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I should move emit program properties to TargetStreamer.
Thanks,
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| : GNU_PROPERTY_X86_FEATURE_1_AND; | ||
| uint32_t featureAndType = 0; | ||
| switch (config->emachine) { | ||
| default: |
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Also change the default statement to EM_X86_64 ?
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Emit Zicfiss/Zicfilp to .note.gnu.property sections
Ref: riscv-non-isa/riscv-elf-psabi-doc#417