This revision was automatically updated to reflect the committed changes.
Closed by commit rGc1873d84a331: [Clang][Driver] Pass through the --be8 endian
flag to linker in BareMetal… (authored by simpal01).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D154786/new/
https://reviews.llvm.org/D154786
Files:
clang/lib/Driver/ToolChains/Arch/ARM.cpp
clang/lib/Driver/ToolChains/Arch/ARM.h
clang/lib/Driver/ToolChains/BareMetal.cpp
clang/lib/Driver/ToolChains/Gnu.cpp
clang/test/Driver/baremetal.cpp
Index: clang/test/Driver/baremetal.cpp
===================================================================
--- clang/test/Driver/baremetal.cpp
+++ clang/test/Driver/baremetal.cpp
@@ -15,7 +15,7 @@
// CHECK-V6M-C-SAME: "-internal-isystem" "[[SYSROOT]]{{[/\\]+}}include{{[/\\]+}}c++{{[/\\]+}}v1"
// CHECk-V6M-C-SAME: "-internal-isystem" "[[SYSROOT]]{{[/\\]+}}include"
// CHECK-V6M-C-SAME: "-x" "c++" "{{.*}}baremetal.cpp"
-// CHECK-V6M-C-NEXT: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-C-NEXT: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
// CHECK-V6M-C-SAME: "-T" "semihosted.lds" "-Lsome{{[/\\]+}}directory{{[/\\]+}}user{{[/\\]+}}asked{{[/\\]+}}for"
// CHECK-V6M-C-SAME: "-L[[SYSROOT:[^"]+]]{{[/\\]+}}lib"
// CHECK-V6M-C-SAME: "-L[[RESOURCE_DIR:[^"]+]]{{[/\\]+}}lib{{[/\\]+}}baremetal"
@@ -34,7 +34,7 @@
// CHECK-ARMV7M-PER-TARGET: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
// CHECK-ARMV7M-PER-TARGET: "-isysroot" "[[SYSROOT:[^"]*]]"
// CHECK-ARMV7M-PER-TARGET: "-x" "c++" "{{.*}}baremetal.cpp"
-// CHECK-ARMV7M-PER-TARGET: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic"
+// CHECK-ARMV7M-PER-TARGET: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
// CHECK-ARMV7M-PER-TARGET: "-L[[SYSROOT:[^"]+]]{{[/\\]+}}lib"
// CHECK-ARMV7M-PER-TARGET: "-L[[RESOURCE_DIR:[^"]+]]{{[/\\]+}}lib{{[/\\]+}}armv7m-vendor-none-eabi
// CHECK-ARMV7M-PER-TARGET: "-lc" "-lm" "-lclang_rt.builtins"
@@ -42,7 +42,7 @@
// RUN: %clangxx %s -### --target=armv6m-none-eabi 2>&1 \
// RUN: --sysroot=%S/Inputs/baremetal_arm | FileCheck --check-prefix=CHECK-V6M-DEFAULTCXX %s
// CHECK-V6M-DEFAULTCXX: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
-// CHECK-V6M-DEFAULTCXX: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-DEFAULTCXX: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
// CHECK-V6M-DEFAULTCXX-SAME: "-L{{[^"]*}}{{[/\\]+}}Inputs{{[/\\]+}}baremetal_arm{{[/\\]+}}lib"
// CHECK-V6M-DEFAULTCXX-SAME: "-L[[RESOURCE_DIR]]{{[/\\]+}}lib{{[/\\]+}}baremetal"
// CHECK-V6M-DEFAULTCXX-SAME: "-lc++" "-lc++abi" "-lunwind"
@@ -53,7 +53,7 @@
// CHECK-V6M-LIBCXX: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
// CHECK-V6M-LIBCXX-NOT: "-internal-isystem" "{{[^"]+}}{{[/\\]+}}include{{[/\\]+}}c++{{[/\\]+}}{{[^v].*}}"
// CHECK-V6M-LIBCXX-SAME: "-internal-isystem" "{{[^"]+}}{{[/\\]+}}include{{[/\\]+}}c++{{[/\\]+}}v1"
-// CHECK-V6M-LIBCXX: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-LIBCXX: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
// CHECK-V6M-LIBCXX-SAME: "-L{{[^"]*}}{{[/\\]+}}Inputs{{[/\\]+}}baremetal_arm{{[/\\]+}}lib"
// CHECK-V6M-LIBCXX-SAME: "-L[[RESOURCE_DIR]]{{[/\\]+}}lib{{[/\\]+}}baremetal"
// CHECK-V6M-LIBCXX-SAME: "-lc++" "-lc++abi" "-lunwind"
@@ -66,7 +66,7 @@
// CHECK-V6M-LIBSTDCXX: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
// CHECK-V6M-LIBSTDCXX-NOT: "-internal-isystem" "{{[^"]+}}{{[/\\]+}}include{{[/\\]+}}c++{{[/\\]+}}v1"
// CHECK-V6M-LIBSTDCXX-SAME: "-internal-isystem" "{{[^"]+}}{{[/\\]+}}include{{[/\\]+}}c++{{[/\\]+}}6.0.0"
-// CHECK-V6M-LIBSTDCXX: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-LIBSTDCXX: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
// CHECK-V6M-LIBSTDCXX-SAME: "-L{{[^"]*}}{{[/\\]+}}Inputs{{[/\\]+}}baremetal_arm{{[/\\]+}}lib"
// CHECK-V6M-LIBSTDCXX-SAME: "-L[[RESOURCE_DIR]]{{[/\\]+}}lib{{[/\\]+}}baremetal"
// CHECK-V6M-LIBSTDCXX-SAME: "-lstdc++" "-lsupc++" "-lunwind"
@@ -77,7 +77,7 @@
// RUN: -nodefaultlibs \
// RUN: | FileCheck --check-prefix=CHECK-V6M-NDL %s
// CHECK-V6M-NDL: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
-// CHECK-V6M-NDL: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-NDL: ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
// CHECK-V6M-NDL-SAME: "-L{{[^"]*}}{{[/\\]+}}Inputs{{[/\\]+}}baremetal_arm{{[/\\]+}}lib"
// CHECK-V6M-NDL-SAME: "-L[[RESOURCE_DIR]]{{[/\\]+}}lib{{[/\\]+}}baremetal"
@@ -117,6 +117,46 @@
// RUN: | FileCheck %s --check-prefix=CHECK-SYSROOT-INC
// CHECK-SYSROOT-INC-NOT: "-internal-isystem" "include"
+// RUN: %clang -### %s --target=armebv7-none-eabi --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARMV7EB %s
+// CHECK-ARMV7EB: "{{.*}}ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "--be8" "-EB"
+
+// RUN: %clang -### %s --target=armv7-none-eabi -mbig-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARMV7EB %s
+
+// RUN: %clang -### %s --target=armebv7-none-eabi -mbig-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARMV7EB %s
+
+// RUN: %clang -### %s --target=armv7-none-eabi --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARMV7EL %s
+// CHECK-ARMV7EL: "{{.*}}ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
+// CHECK-ARMV7EL-NOT: "--be8"
+
+// RUN: %clang -### %s --target=armebv7-none-eabi -mlittle-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARMV7EL %s
+
+// RUN: %clang -### %s --target=armv7-none-eabi -mlittle-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARMV7EL %s
+
+// RUN: %clang -### %s --target=aarch64_be-none-elf --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-AARCH64BE %s
+// CHECK-AARCH64BE: "{{.*}}ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EB"
+// CHECK-AARCH64BE-NOT: "--be8"
+
+// RUN: %clang -### %s --target=aarch64-none-elf -mbig-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-AARCH64BE %s
+
+// RUN: %clang -### %s --target=aarch64_be-none-elf -mbig-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-AARCH64BE %s
+
+// RUN: %clang -### %s --target=aarch64-none-elf --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-AARCH64LE %s
+// CHECK-AARCH64LE: "{{.*}}ld{{(.exe)?}}" "{{.*}}.o" "-Bstatic" "-EL"
+// CHECK-AARCH64LE-NOT: "--be8"
+
+// RUN: %clang -### %s --target=aarch64_be-none-elf -mlittle-endian --sysroot=%S/Inputs/baremetal_arm 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-AARCH64LE %s
+
// RUN: %clang -no-canonical-prefixes %s -### --target=aarch64-none-elf 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-AARCH64-NO-HOST-INC %s
// Verify that the bare metal driver does not include any host system paths:
Index: clang/lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Gnu.cpp
+++ clang/lib/Driver/ToolChains/Gnu.cpp
@@ -220,30 +220,6 @@
// The types are (hopefully) good enough.
}
-// On Arm the endianness of the output file is determined by the target and
-// can be overridden by the pseudo-target flags '-mlittle-endian'/'-EL' and
-// '-mbig-endian'/'-EB'. Unlike other targets the flag does not result in a
-// normalized triple so we must handle the flag here.
-static bool isArmBigEndian(const llvm::Triple &Triple,
- const ArgList &Args) {
- bool IsBigEndian = false;
- switch (Triple.getArch()) {
- case llvm::Triple::armeb:
- case llvm::Triple::thumbeb:
- IsBigEndian = true;
- [[fallthrough]];
- case llvm::Triple::arm:
- case llvm::Triple::thumb:
- if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
- options::OPT_mbig_endian))
- IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
- break;
- default:
- break;
- }
- return IsBigEndian;
-}
-
static const char *getLDMOption(const llvm::Triple &T, const ArgList &Args) {
switch (T.getArch()) {
case llvm::Triple::x86:
@@ -258,7 +234,8 @@
case llvm::Triple::thumb:
case llvm::Triple::armeb:
case llvm::Triple::thumbeb:
- return isArmBigEndian(T, Args) ? "armelfb_linux_eabi" : "armelf_linux_eabi";
+ return tools::arm::isARMBigEndian(T, Args) ? "armelfb_linux_eabi"
+ : "armelf_linux_eabi";
case llvm::Triple::m68k:
return "m68kelf";
case llvm::Triple::ppc:
@@ -448,7 +425,7 @@
CmdArgs.push_back("-s");
if (Triple.isARM() || Triple.isThumb() || Triple.isAArch64()) {
- bool IsBigEndian = isArmBigEndian(Triple, Args);
+ bool IsBigEndian = arm::isARMBigEndian(Triple, Args);
if (IsBigEndian)
arm::appendBE8LinkFlag(Args, CmdArgs, Triple);
IsBigEndian = IsBigEndian || Arch == llvm::Triple::aarch64_be;
@@ -820,7 +797,7 @@
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
const llvm::Triple &Triple2 = getToolChain().getTriple();
- CmdArgs.push_back(isArmBigEndian(Triple2, Args) ? "-EB" : "-EL");
+ CmdArgs.push_back(arm::isARMBigEndian(Triple2, Args) ? "-EB" : "-EL");
switch (Triple2.getSubArch()) {
case llvm::Triple::ARMSubArch_v7:
CmdArgs.push_back("-mfpu=neon");
Index: clang/lib/Driver/ToolChains/BareMetal.cpp
===================================================================
--- clang/lib/Driver/ToolChains/BareMetal.cpp
+++ clang/lib/Driver/ToolChains/BareMetal.cpp
@@ -12,6 +12,7 @@
#include "Gnu.h"
#include "clang/Driver/InputInfo.h"
+#include "Arch/ARM.h"
#include "Arch/RISCV.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
@@ -115,10 +116,12 @@
}
}
-/// Is the triple {arm,thumb}-none-none-{eabi,eabihf} ?
+/// Is the triple {arm,armeb,thumb,thumbeb}-none-none-{eabi,eabihf} ?
static bool isARMBareMetal(const llvm::Triple &Triple) {
if (Triple.getArch() != llvm::Triple::arm &&
- Triple.getArch() != llvm::Triple::thumb)
+ Triple.getArch() != llvm::Triple::thumb &&
+ Triple.getArch() != llvm::Triple::armeb &&
+ Triple.getArch() != llvm::Triple::thumbeb)
return false;
if (Triple.getVendor() != llvm::Triple::UnknownVendor)
@@ -134,9 +137,10 @@
return true;
}
-/// Is the triple aarch64-none-elf?
+/// Is the triple {aarch64.aarch64_be}-none-elf?
static bool isAArch64BareMetal(const llvm::Triple &Triple) {
- if (Triple.getArch() != llvm::Triple::aarch64)
+ if (Triple.getArch() != llvm::Triple::aarch64 &&
+ Triple.getArch() != llvm::Triple::aarch64_be)
return false;
if (Triple.getVendor() != llvm::Triple::UnknownVendor)
@@ -432,11 +436,21 @@
ArgStringList CmdArgs;
auto &TC = static_cast<const toolchains::BareMetal &>(getToolChain());
+ const llvm::Triple::ArchType Arch = TC.getArch();
+ const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
CmdArgs.push_back("-Bstatic");
+ if (Triple.isARM() || Triple.isThumb() || Triple.isAArch64()) {
+ bool IsBigEndian = arm::isARMBigEndian(Triple, Args);
+ if (IsBigEndian)
+ arm::appendBE8LinkFlag(Args, CmdArgs, Triple);
+ IsBigEndian = IsBigEndian || Arch == llvm::Triple::aarch64_be;
+ CmdArgs.push_back(IsBigEndian ? "-EB" : "-EL");
+ }
+
Args.AddAllArgs(CmdArgs,
{options::OPT_L, options::OPT_T_Group, options::OPT_s,
options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
Index: clang/lib/Driver/ToolChains/Arch/ARM.h
===================================================================
--- clang/lib/Driver/ToolChains/Arch/ARM.h
+++ clang/lib/Driver/ToolChains/Arch/ARM.h
@@ -11,6 +11,7 @@
#include "clang/Driver/ToolChain.h"
#include "llvm/ADT/StringRef.h"
+#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/TargetParser/ARMTargetParser.h"
#include "llvm/TargetParser/Triple.h"
@@ -73,6 +74,7 @@
int getARMSubArchVersionNumber(const llvm::Triple &Triple);
bool isARMMProfile(const llvm::Triple &Triple);
bool isARMAProfile(const llvm::Triple &Triple);
+bool isARMBigEndian(const llvm::Triple &Triple, const llvm::opt::ArgList &Args);
} // end namespace arm
} // end namespace tools
Index: clang/lib/Driver/ToolChains/Arch/ARM.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Arch/ARM.cpp
+++ clang/lib/Driver/ToolChains/Arch/ARM.cpp
@@ -32,6 +32,20 @@
return llvm::ARM::parseArchProfile(Arch) == llvm::ARM::ProfileKind::M;
}
+// On Arm the endianness of the output file is determined by the target and
+// can be overridden by the pseudo-target flags '-mlittle-endian'/'-EL' and
+// '-mbig-endian'/'-EB'. Unlike other targets the flag does not result in a
+// normalized triple so we must handle the flag here.
+bool arm::isARMBigEndian(const llvm::Triple &Triple, const ArgList &Args) {
+ if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
+ options::OPT_mbig_endian)) {
+ return !A->getOption().matches(options::OPT_mlittle_endian);
+ }
+
+ return Triple.getArch() == llvm::Triple::armeb ||
+ Triple.getArch() == llvm::Triple::thumbeb;
+}
+
// True if A-profile.
bool arm::isARMAProfile(const llvm::Triple &Triple) {
llvm::StringRef Arch = Triple.getArchName();
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