1 //===--- AIX.cpp - AIX ToolChain Implementations ----------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "AIX.h"
10 #include "Arch/PPC.h"
11 #include "CommonArgs.h"
12 #include "clang/Driver/Compilation.h"
13 #include "clang/Driver/Options.h"
14 #include "clang/Driver/SanitizerArgs.h"
15 #include "llvm/Option/ArgList.h"
16 #include "llvm/Support/Path.h"
17
18 using AIX = clang::driver::toolchains::AIX;
19 using namespace clang::driver;
20 using namespace clang::driver::tools;
21 using namespace clang::driver::toolchains;
22
23 using namespace llvm::opt;
24 using namespace llvm::sys;
25
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const26 void aix::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
27 const InputInfo &Output,
28 const InputInfoList &Inputs,
29 const ArgList &Args,
30 const char *LinkingOutput) const {
31 ArgStringList CmdArgs;
32
33 const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit();
34 const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit();
35 // Only support 32 and 64 bit.
36 if (!IsArch32Bit && !IsArch64Bit)
37 llvm_unreachable("Unsupported bit width value.");
38
39 // Specify the mode in which the as(1) command operates.
40 if (IsArch32Bit) {
41 CmdArgs.push_back("-a32");
42 } else {
43 // Must be 64-bit, otherwise asserted already.
44 CmdArgs.push_back("-a64");
45 }
46
47 // Accept any mixture of instructions.
48 // On Power for AIX and Linux, this behaviour matches that of GCC for both the
49 // user-provided assembler source case and the compiler-produced assembler
50 // source case. Yet XL with user-provided assembler source would not add this.
51 CmdArgs.push_back("-many");
52
53 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
54
55 // Specify assembler output file.
56 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
57 if (Output.isFilename()) {
58 CmdArgs.push_back("-o");
59 CmdArgs.push_back(Output.getFilename());
60 }
61
62 // Specify assembler input file.
63 // The system assembler on AIX takes exactly one input file. The driver is
64 // expected to invoke as(1) separately for each assembler source input file.
65 if (Inputs.size() != 1)
66 llvm_unreachable("Invalid number of input files.");
67 const InputInfo &II = Inputs[0];
68 assert((II.isFilename() || II.isNothing()) && "Invalid input.");
69 if (II.isFilename())
70 CmdArgs.push_back(II.getFilename());
71
72 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
73 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
74 Exec, CmdArgs, Inputs, Output));
75 }
76
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const77 void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
78 const InputInfo &Output,
79 const InputInfoList &Inputs, const ArgList &Args,
80 const char *LinkingOutput) const {
81 const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
82 const Driver &D = ToolChain.getDriver();
83 ArgStringList CmdArgs;
84
85 const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
86 const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
87 // Only support 32 and 64 bit.
88 if (!(IsArch32Bit || IsArch64Bit))
89 llvm_unreachable("Unsupported bit width value.");
90
91 // Force static linking when "-static" is present.
92 if (Args.hasArg(options::OPT_static))
93 CmdArgs.push_back("-bnso");
94
95 // Add options for shared libraries.
96 if (Args.hasArg(options::OPT_shared)) {
97 CmdArgs.push_back("-bM:SRE");
98 CmdArgs.push_back("-bnoentry");
99 }
100
101 // Specify linker output file.
102 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
103 if (Output.isFilename()) {
104 CmdArgs.push_back("-o");
105 CmdArgs.push_back(Output.getFilename());
106 }
107
108 // Set linking mode (i.e., 32/64-bit) and the address of
109 // text and data sections based on arch bit width.
110 if (IsArch32Bit) {
111 CmdArgs.push_back("-b32");
112 CmdArgs.push_back("-bpT:0x10000000");
113 CmdArgs.push_back("-bpD:0x20000000");
114 } else {
115 // Must be 64-bit, otherwise asserted already.
116 CmdArgs.push_back("-b64");
117 CmdArgs.push_back("-bpT:0x100000000");
118 CmdArgs.push_back("-bpD:0x110000000");
119 }
120
121 auto getCrt0Basename = [&Args, IsArch32Bit] {
122 // Enable gprofiling when "-pg" is specified.
123 if (Args.hasArg(options::OPT_pg))
124 return IsArch32Bit ? "gcrt0.o" : "gcrt0_64.o";
125 // Enable profiling when "-p" is specified.
126 else if (Args.hasArg(options::OPT_p))
127 return IsArch32Bit ? "mcrt0.o" : "mcrt0_64.o";
128 else
129 return IsArch32Bit ? "crt0.o" : "crt0_64.o";
130 };
131
132 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
133 options::OPT_shared)) {
134 CmdArgs.push_back(
135 Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
136
137 CmdArgs.push_back(Args.MakeArgString(
138 ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : "crti_64.o")));
139 }
140
141 // Collect all static constructor and destructor functions in both C and CXX
142 // language link invocations. This has to come before AddLinkerInputs as the
143 // implied option needs to precede any other '-bcdtors' settings or
144 // '-bnocdtors' that '-Wl' might forward.
145 CmdArgs.push_back("-bcdtors:all:0:s");
146
147 // Specify linker input file(s).
148 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
149
150 // Add directory to library search path.
151 Args.AddAllArgs(CmdArgs, options::OPT_L);
152 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
153 ToolChain.addProfileRTLibs(Args, CmdArgs);
154
155 if (getToolChain().ShouldLinkCXXStdlib(Args))
156 getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
157
158 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
159 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
160
161 // Support POSIX threads if "-pthreads" or "-pthread" is present.
162 if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
163 CmdArgs.push_back("-lpthreads");
164
165 if (D.CCCIsCXX())
166 CmdArgs.push_back("-lm");
167
168 CmdArgs.push_back("-lc");
169 }
170
171 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
172 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
173 Exec, CmdArgs, Inputs, Output));
174 }
175
176 /// AIX - AIX tool chain which can call as(1) and ld(1) directly.
AIX(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)177 AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
178 : ToolChain(D, Triple, Args) {
179 getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
180 }
181
182 // Returns the effective header sysroot path to use.
183 // This comes from either -isysroot or --sysroot.
184 llvm::StringRef
GetHeaderSysroot(const llvm::opt::ArgList & DriverArgs) const185 AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const {
186 if (DriverArgs.hasArg(options::OPT_isysroot))
187 return DriverArgs.getLastArgValue(options::OPT_isysroot);
188 if (!getDriver().SysRoot.empty())
189 return getDriver().SysRoot;
190 return "/";
191 }
192
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const193 void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
194 ArgStringList &CC1Args) const {
195 // Return if -nostdinc is specified as a driver option.
196 if (DriverArgs.hasArg(options::OPT_nostdinc))
197 return;
198
199 llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
200 const Driver &D = getDriver();
201
202 // Add the Clang builtin headers (<resource>/include).
203 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
204 SmallString<128> P(D.ResourceDir);
205 path::append(P, "/include");
206 addSystemInclude(DriverArgs, CC1Args, P.str());
207 }
208
209 // Return if -nostdlibinc is specified as a driver option.
210 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
211 return;
212
213 // Add <sysroot>/usr/include.
214 SmallString<128> UP(Sysroot);
215 path::append(UP, "/usr/include");
216 addSystemInclude(DriverArgs, CC1Args, UP.str());
217 }
218
AddCXXStdlibLibArgs(const llvm::opt::ArgList & Args,llvm::opt::ArgStringList & CmdArgs) const219 void AIX::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
220 llvm::opt::ArgStringList &CmdArgs) const {
221 switch (GetCXXStdlibType(Args)) {
222 case ToolChain::CST_Libcxx:
223 CmdArgs.push_back("-lc++");
224 return;
225 case ToolChain::CST_Libstdcxx:
226 llvm::report_fatal_error("linking libstdc++ unimplemented on AIX");
227 }
228
229 llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
230 }
231
GetDefaultCXXStdlibType() const232 ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const {
233 return ToolChain::CST_Libcxx;
234 }
235
GetDefaultRuntimeLibType() const236 ToolChain::RuntimeLibType AIX::GetDefaultRuntimeLibType() const {
237 return ToolChain::RLT_CompilerRT;
238 }
239
buildAssembler() const240 auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
241
buildLinker() const242 auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
243