1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
//===--- RISCVToolchain.cpp - RISCV ToolChain Implementations ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "RISCVToolchain.h"
#include "CommonArgs.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/InputInfo.h"
#include "clang/Driver/Options.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
const Multilib &Multilib,
StringRef InstallPath,
ToolChain::path_list &Paths) {
if (const auto &PathsCallback = Multilibs.filePathsCallback())
for (const auto &Path : PathsCallback(Multilib))
addPathIfExists(D, InstallPath + Path, Paths);
}
// This function tests whether a gcc installation is present either
// through gcc-toolchain argument or in the same prefix where clang
// is installed. This helps decide whether to instantiate this toolchain
// or Baremetal toolchain.
bool RISCVToolChain::hasGCCToolchain(const Driver &D,
const llvm::opt::ArgList &Args) {
if (Args.getLastArg(options::OPT_gcc_toolchain))
return true;
SmallString<128> GCCDir;
llvm::sys::path::append(GCCDir, D.Dir, "..", D.getTargetTriple(),
"lib/crt0.o");
return llvm::sys::fs::exists(GCCDir);
}
/// RISCV Toolchain
RISCVToolChain::RISCVToolChain(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: Generic_ELF(D, Triple, Args) {
GCCInstallation.init(Triple, Args);
if (GCCInstallation.isValid()) {
Multilibs = GCCInstallation.getMultilibs();
SelectedMultilib = GCCInstallation.getMultilib();
path_list &Paths = getFilePaths();
// Add toolchain/multilib specific file paths.
addMultilibsFilePaths(D, Multilibs, SelectedMultilib,
GCCInstallation.getInstallPath(), Paths);
getFilePaths().push_back(GCCInstallation.getInstallPath().str());
ToolChain::path_list &PPaths = getProgramPaths();
// Multilib cross-compiler GCC installations put ld in a triple-prefixed
// directory off of the parent of the GCC installation.
PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
GCCInstallation.getTriple().str() + "/bin")
.str());
PPaths.push_back((GCCInstallation.getParentLibPath() + "/../bin").str());
} else {
getProgramPaths().push_back(D.Dir);
}
getFilePaths().push_back(computeSysRoot() + "/lib");
}
Tool *RISCVToolChain::buildLinker() const {
return new tools::RISCV::Linker(*this);
}
ToolChain::RuntimeLibType RISCVToolChain::GetDefaultRuntimeLibType() const {
return GCCInstallation.isValid() ?
ToolChain::RLT_Libgcc : ToolChain::RLT_CompilerRT;
}
ToolChain::UnwindLibType
RISCVToolChain::GetUnwindLibType(const llvm::opt::ArgList &Args) const {
return ToolChain::UNW_None;
}
void RISCVToolChain::addClangTargetOptions(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind) const {
CC1Args.push_back("-nostdsysteminc");
}
void RISCVToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdinc))
return;
if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
SmallString<128> Dir(computeSysRoot());
llvm::sys::path::append(Dir, "include");
addSystemInclude(DriverArgs, CC1Args, Dir.str());
}
}
void RISCVToolChain::addLibStdCxxIncludePaths(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
const GCCVersion &Version = GCCInstallation.getVersion();
StringRef TripleStr = GCCInstallation.getTriple().str();
const Multilib &Multilib = GCCInstallation.getMultilib();
addLibStdCXXIncludePaths(computeSysRoot() + "/include/c++/" + Version.Text,
TripleStr, Multilib.includeSuffix(), DriverArgs,
CC1Args);
}
std::string RISCVToolChain::computeSysRoot() const {
if (!getDriver().SysRoot.empty())
return getDriver().SysRoot;
SmallString<128> SysRootDir;
if (GCCInstallation.isValid()) {
StringRef LibDir = GCCInstallation.getParentLibPath();
StringRef TripleStr = GCCInstallation.getTriple().str();
llvm::sys::path::append(SysRootDir, LibDir, "..", TripleStr);
} else {
// Use the triple as provided to the driver. Unlike the parsed triple
// this has not been normalized to always contain every field.
llvm::sys::path::append(SysRootDir, getDriver().Dir, "..",
getDriver().getTargetTriple());
}
if (!llvm::sys::fs::exists(SysRootDir))
return std::string();
return std::string(SysRootDir.str());
}
void RISCV::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
const ToolChain &ToolChain = getToolChain();
const Driver &D = ToolChain.getDriver();
ArgStringList CmdArgs;
if (!D.SysRoot.empty())
CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
bool IsRV64 = ToolChain.getArch() == llvm::Triple::riscv64;
CmdArgs.push_back("-m");
if (IsRV64) {
CmdArgs.push_back("elf64lriscv");
} else {
CmdArgs.push_back("elf32lriscv");
}
std::string Linker = getToolChain().GetLinkerPath();
bool WantCRTs =
!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
const char *crtbegin, *crtend;
auto RuntimeLib = ToolChain.GetRuntimeLibType(Args);
if (RuntimeLib == ToolChain::RLT_Libgcc) {
crtbegin = "crtbegin.o";
crtend = "crtend.o";
} else {
assert (RuntimeLib == ToolChain::RLT_CompilerRT);
crtbegin = ToolChain.getCompilerRTArgString(Args, "crtbegin",
ToolChain::FT_Object);
crtend = ToolChain.getCompilerRTArgString(Args, "crtend",
ToolChain::FT_Object);
}
if (WantCRTs) {
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
}
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
Args.AddAllArgs(CmdArgs, options::OPT_L);
Args.AddAllArgs(CmdArgs, options::OPT_u);
ToolChain.AddFilePathLibArgs(Args, CmdArgs);
Args.AddAllArgs(CmdArgs,
{options::OPT_T_Group, options::OPT_e, options::OPT_s,
options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
// TODO: add C++ includes and libs if compiling C++.
if (!Args.hasArg(options::OPT_nostdlib) &&
!Args.hasArg(options::OPT_nodefaultlibs)) {
if (ToolChain.ShouldLinkCXXStdlib(Args))
ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
CmdArgs.push_back("--start-group");
CmdArgs.push_back("-lc");
CmdArgs.push_back("-lgloss");
CmdArgs.push_back("--end-group");
AddRunTimeLibs(ToolChain, ToolChain.getDriver(), CmdArgs, Args);
}
if (WantCRTs)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
C.addCommand(std::make_unique<Command>(
JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
CmdArgs, Inputs, Output));
}
// RISCV tools end.
|
