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powerpc: Transition to Secure-PLT, like most other OSs (Toolchain part)

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Summary:
Toolchain follow-up to r349350.  LLVM patches will be submitted upstream for
9.0 as well.

The bsd.cpu.mk change is required because GNU ld assumes BSS-PLT if it
cannot determine for certain that it needs Secure-PLT, and some binaries do
not compile in such a way to make it know to use Secure-PLT.

Reviewed By: nwhitehorn, bdragon, pfg
Differential Revision: https://reviews.freebsd.org/D20598
This commit is contained in:
Justin Hibbits 2019-06-25 02:35:22 +00:00
parent f62da49b2f
commit e861dab451
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349351
4 changed files with 11 additions and 2 deletions
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3
contrib/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
View File

@ -138,7 +138,8 @@ void PPCSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
if (isDarwin())
HasLazyResolverStubs = true;
if (TargetTriple.isOSNetBSD() || TargetTriple.isOSOpenBSD())
if ((TargetTriple.isOSFreeBSD() && TargetTriple.getOSMajorVersion() >= 13)
|| TargetTriple.isOSNetBSD() || TargetTriple.isOSOpenBSD())
SecurePlt = true;
if (HasSPE && IsPPC64)

3
contrib/llvm/tools/clang/lib/Driver/ToolChains/Arch/PPC.cpp
View File

@ -116,7 +116,8 @@ ppc::ReadGOTPtrMode ppc::getPPCReadGOTPtrMode(const Driver &D, const llvm::Tripl
const ArgList &Args) {
if (Args.getLastArg(options::OPT_msecure_plt))
return ppc::ReadGOTPtrMode::SecurePlt;
if (Triple.isOSOpenBSD())
if ((Triple.isOSFreeBSD() && Triple.getOSMajorVersion() >= 13) ||
Triple.isOSOpenBSD())
return ppc::ReadGOTPtrMode::SecurePlt;
else
return ppc::ReadGOTPtrMode::Bss;

3
gnu/usr.bin/cc/cc_tools/Makefile.hdrs
View File

@ -21,6 +21,9 @@ TARGET_INC+= ${GCC_CPU}/${GCC_CPU}.h
TARGET_INC+= ${GCC_CPU}/unix.h
TARGET_INC+= ${GCC_CPU}/att.h
.endif
.if ${TARGET_CPUARCH} == "powerpc"
TARGET_INC+= ${GCC_CPU}/secureplt.h
.endif
TARGET_INC+= dbxelf.h
TARGET_INC+= elfos-undef.h
TARGET_INC+= elfos.h

4
share/mk/bsd.cpu.mk
View File

@ -369,6 +369,10 @@ CFLAGS += -mfloat-abi=softfp
.endif
.endif
.if ${MACHINE_ARCH} == "powerpc" || ${MACHINE_ARCH} == "powerpcspe"
LDFLAGS+= -Wl,--secure-plt
.endif
.if ${MACHINE_ARCH} == "powerpcspe"
CFLAGS += -mcpu=8548 -Wa,-me500 -mspe=yes -mabi=spe -mfloat-gprs=double
.endif