xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChains/AIX.cpp (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
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 
26 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 
83 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.
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
172 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 
180 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 
206 auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
207 
208 auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
209