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 an undefined symbol as an extern so that an error message is not
48 // displayed. Otherwise, undefined symbols are flagged with error messages.
49 // FIXME: This should be removed when the assembly generation from the
50 // compiler is able to write externs properly.
51 CmdArgs.push_back("-u");
52
53 // Accept any mixture of instructions.
54 // On Power for AIX and Linux, this behaviour matches that of GCC for both the
55 // user-provided assembler source case and the compiler-produced assembler
56 // source case. Yet XL with user-provided assembler source would not add this.
57 CmdArgs.push_back("-many");
58
59 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
60
61 // Specify assembler output file.
62 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
63 if (Output.isFilename()) {
64 CmdArgs.push_back("-o");
65 CmdArgs.push_back(Output.getFilename());
66 }
67
68 // Specify assembler input file.
69 // The system assembler on AIX takes exactly one input file. The driver is
70 // expected to invoke as(1) separately for each assembler source input file.
71 if (Inputs.size() != 1)
72 llvm_unreachable("Invalid number of input files.");
73 const InputInfo &II = Inputs[0];
74 assert((II.isFilename() || II.isNothing()) && "Invalid input.");
75 if (II.isFilename())
76 CmdArgs.push_back(II.getFilename());
77
78 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
79 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
80 Exec, CmdArgs, Inputs));
81 }
82
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const83 void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
84 const InputInfo &Output,
85 const InputInfoList &Inputs, const ArgList &Args,
86 const char *LinkingOutput) const {
87 const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
88 const Driver &D = ToolChain.getDriver();
89 ArgStringList CmdArgs;
90
91 const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
92 const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
93 // Only support 32 and 64 bit.
94 if (!(IsArch32Bit || IsArch64Bit))
95 llvm_unreachable("Unsupported bit width value.");
96
97 // Force static linking when "-static" is present.
98 if (Args.hasArg(options::OPT_static))
99 CmdArgs.push_back("-bnso");
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)) {
133 CmdArgs.push_back(
134 Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
135 }
136
137 // Collect all static constructor and destructor functions in CXX mode. This
138 // has to come before AddLinkerInputs as the implied option needs to precede
139 // any other '-bcdtors' settings or '-bnocdtors' that '-Wl' might forward.
140 if (D.CCCIsCXX())
141 CmdArgs.push_back("-bcdtors:all:0:s");
142
143 // Specify linker input file(s).
144 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
145
146 // Add directory to library search path.
147 Args.AddAllArgs(CmdArgs, options::OPT_L);
148 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
149
150 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
151 // Support POSIX threads if "-pthreads" or "-pthread" is present.
152 if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
153 CmdArgs.push_back("-lpthreads");
154
155 CmdArgs.push_back("-lc");
156 }
157
158 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
159 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
160 Exec, CmdArgs, Inputs));
161 }
162
163 /// AIX - AIX tool chain which can call as(1) and ld(1) directly.
AIX(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)164 AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
165 : ToolChain(D, Triple, Args) {
166 getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
167 }
168
169 // Returns the effective header sysroot path to use.
170 // This comes from either -isysroot or --sysroot.
171 llvm::StringRef
GetHeaderSysroot(const llvm::opt::ArgList & DriverArgs) const172 AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const {
173 if (DriverArgs.hasArg(options::OPT_isysroot))
174 return DriverArgs.getLastArgValue(options::OPT_isysroot);
175 if (!getDriver().SysRoot.empty())
176 return getDriver().SysRoot;
177 return "/";
178 }
179
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const180 void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
181 ArgStringList &CC1Args) const {
182 // Return if -nostdinc is specified as a driver option.
183 if (DriverArgs.hasArg(options::OPT_nostdinc))
184 return;
185
186 llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
187 const Driver &D = getDriver();
188
189 // Add the Clang builtin headers (<resource>/include).
190 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
191 SmallString<128> P(D.ResourceDir);
192 path::append(P, "/include");
193 addSystemInclude(DriverArgs, CC1Args, P.str());
194 }
195
196 // Return if -nostdlibinc is specified as a driver option.
197 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
198 return;
199
200 // Add <sysroot>/usr/include.
201 SmallString<128> UP(Sysroot);
202 path::append(UP, "/usr/include");
203 addSystemInclude(DriverArgs, CC1Args, UP.str());
204 }
205
buildAssembler() const206 auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
207
buildLinker() const208 auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
209