clang  10.0.0git
AIX.cpp
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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"
13 #include "clang/Driver/Options.h"
15 #include "llvm/Option/ArgList.h"
16 
18 using namespace clang::driver;
19 using namespace clang::driver::tools;
20 
21 using namespace llvm::opt;
22 
24  const InputInfo &Output,
25  const InputInfoList &Inputs,
26  const ArgList &Args,
27  const char *LinkingOutput) const {
28  ArgStringList CmdArgs;
29 
30  const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit();
31  const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit();
32  // Only support 32 and 64 bit.
33  if (!IsArch32Bit && !IsArch64Bit)
34  llvm_unreachable("Unsupported bit width value.");
35 
36  // Specify the mode in which the as(1) command operates.
37  if (IsArch32Bit) {
38  CmdArgs.push_back("-a32");
39  } else {
40  // Must be 64-bit, otherwise asserted already.
41  CmdArgs.push_back("-a64");
42  }
43 
44  // Accept an undefined symbol as an extern so that an error message is not
45  // displayed. Otherwise, undefined symbols are flagged with error messages.
46  // FIXME: This should be removed when the assembly generation from the
47  // compiler is able to write externs properly.
48  CmdArgs.push_back("-u");
49 
50  // Accept any mixture of instructions.
51  // On Power for AIX and Linux, this behaviour matches that of GCC for both the
52  // user-provided assembler source case and the compiler-produced assembler
53  // source case. Yet XL with user-provided assembler source would not add this.
54  CmdArgs.push_back("-many");
55 
56  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
57 
58  // Specify assembler output file.
59  assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
60  if (Output.isFilename()) {
61  CmdArgs.push_back("-o");
62  CmdArgs.push_back(Output.getFilename());
63  }
64 
65  // Specify assembler input file.
66  // The system assembler on AIX takes exactly one input file. The driver is
67  // expected to invoke as(1) separately for each assembler source input file.
68  if (Inputs.size() != 1)
69  llvm_unreachable("Invalid number of input files.");
70  const InputInfo &II = Inputs[0];
71  assert((II.isFilename() || II.isNothing()) && "Invalid input.");
72  if (II.isFilename())
73  CmdArgs.push_back(II.getFilename());
74 
75  const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
76  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
77 }
78 
80  const InputInfo &Output,
81  const InputInfoList &Inputs, const ArgList &Args,
82  const char *LinkingOutput) const {
83  const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
84  ArgStringList CmdArgs;
85 
86  const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
87  const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
88  // Only support 32 and 64 bit.
89  if (!(IsArch32Bit || IsArch64Bit))
90  llvm_unreachable("Unsupported bit width value.");
91 
92  // Force static linking when "-static" is present.
93  if (Args.hasArg(options::OPT_static))
94  CmdArgs.push_back("-bnso");
95 
96  // Specify linker output file.
97  assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
98  if (Output.isFilename()) {
99  CmdArgs.push_back("-o");
100  CmdArgs.push_back(Output.getFilename());
101  }
102 
103  // Set linking mode (i.e., 32/64-bit) and the address of
104  // text and data sections based on arch bit width.
105  if (IsArch32Bit) {
106  CmdArgs.push_back("-b32");
107  CmdArgs.push_back("-bpT:0x10000000");
108  CmdArgs.push_back("-bpD:0x20000000");
109  } else {
110  // Must be 64-bit, otherwise asserted already.
111  CmdArgs.push_back("-b64");
112  CmdArgs.push_back("-bpT:0x100000000");
113  CmdArgs.push_back("-bpD:0x110000000");
114  }
115 
116  auto getCrt0Basename = [&Args, IsArch32Bit] {
117  // Enable gprofiling when "-pg" is specified.
118  if (Args.hasArg(options::OPT_pg))
119  return IsArch32Bit ? "gcrt0.o" : "gcrt0_64.o";
120  // Enable profiling when "-p" is specified.
121  else if (Args.hasArg(options::OPT_p))
122  return IsArch32Bit ? "mcrt0.o" : "mcrt0_64.o";
123  else
124  return IsArch32Bit ? "crt0.o" : "crt0_64.o";
125  };
126 
127  if (!Args.hasArg(options::OPT_nostdlib)) {
128  CmdArgs.push_back(
129  Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
130  }
131 
132  // Specify linker input file(s).
133  AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
134 
135  // Add directory to library search path.
136  Args.AddAllArgs(CmdArgs, options::OPT_L);
137  ToolChain.AddFilePathLibArgs(Args, CmdArgs);
138 
139  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
140  // Support POSIX threads if "-pthreads" or "-pthread" is present.
141  if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
142  CmdArgs.push_back("-lpthreads");
143 
144  CmdArgs.push_back("-lc");
145  }
146 
147  const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
148  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
149 }
150 
151 /// AIX - AIX tool chain which can call as(1) and ld(1) directly.
152 AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
153  : ToolChain(D, Triple, Args) {
154  getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
155 }
156 
157 auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
158 
159 auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
void ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const char *LinkingOutput) const override
ConstructJob - Construct jobs to perform the action JA, writing to Output and with Inputs...
Definition: AIX.cpp:79
std::string GetLinkerPath() const
Returns the linker path, respecting the -fuse-ld= argument to determine the linker suffix or name...
Definition: ToolChain.cpp:520
AIX(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
AIX - AIX tool chain which can call as(1) and ld(1) directly.
Definition: AIX.cpp:152
const char * getFilename() const
Definition: InputInfo.h:83
Tool * buildLinker() const override
Definition: AIX.cpp:159
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:22
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:512
path_list & getFilePaths()
Definition: ToolChain.h:237
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:205
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:906
const Driver & getDriver() const
Definition: ToolChain.h:199
void ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const char *LinkingOutput) const override
ConstructJob - Construct jobs to perform the action JA, writing to Output and with Inputs...
Definition: AIX.cpp:23
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
Tool - Information on a specific compilation tool.
Definition: Tool.h:33
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:45
const llvm::Triple & getTriple() const
Definition: ToolChain.h:201
clang::driver::toolchains::AIX AIX
Definition: AIX.cpp:17
bool isNothing() const
Definition: InputInfo.h:74
bool isFilename() const
Definition: InputInfo.h:75
Tool * buildAssembler() const override
Definition: AIX.cpp:157
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:88