clang 20.0.0git
FreeBSD.cpp
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1//===--- FreeBSD.cpp - FreeBSD 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 "FreeBSD.h"
10#include "Arch/ARM.h"
11#include "Arch/Mips.h"
12#include "Arch/Sparc.h"
13#include "CommonArgs.h"
14#include "clang/Config/config.h"
15#include "clang/Driver/Compilation.h"
16#include "clang/Driver/DriverDiagnostic.h"
17#include "clang/Driver/Options.h"
18#include "clang/Driver/SanitizerArgs.h"
19#include "llvm/Option/ArgList.h"
20#include "llvm/Support/VirtualFileSystem.h"
21
22using namespace clang::driver;
23using namespace clang::driver::tools;
24using namespace clang::driver::toolchains;
25using namespace clang;
26using namespace llvm::opt;
27
28void freebsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
29 const InputInfo &Output,
30 const InputInfoList &Inputs,
31 const ArgList &Args,
32 const char *LinkingOutput) const {
33 const auto &ToolChain = static_cast<const FreeBSD &>(getToolChain());
34 const auto &D = getToolChain().getDriver();
35 const llvm::Triple &Triple = ToolChain.getTriple();
36 ArgStringList CmdArgs;
37
38 claimNoWarnArgs(Args);
39
40 // When building 32-bit code on FreeBSD/amd64, we have to explicitly
41 // instruct as in the base system to assemble 32-bit code.
42 switch (ToolChain.getArch()) {
43 default:
44 break;
45 case llvm::Triple::x86:
46 CmdArgs.push_back("--32");
47 break;
48 case llvm::Triple::ppc:
49 case llvm::Triple::ppcle:
50 CmdArgs.push_back("-a32");
51 break;
52 case llvm::Triple::mips:
53 case llvm::Triple::mipsel:
54 case llvm::Triple::mips64:
55 case llvm::Triple::mips64el: {
56 StringRef CPUName;
57 StringRef ABIName;
58 mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
59
60 CmdArgs.push_back("-march");
61 CmdArgs.push_back(CPUName.data());
62
63 CmdArgs.push_back("-mabi");
64 CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
65
66 if (Triple.isLittleEndian())
67 CmdArgs.push_back("-EL");
68 else
69 CmdArgs.push_back("-EB");
70
71 if (Arg *A = Args.getLastArg(options::OPT_G)) {
72 StringRef v = A->getValue();
73 CmdArgs.push_back(Args.MakeArgString("-G" + v));
74 A->claim();
75 }
76
77 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
78 break;
79 }
80 case llvm::Triple::arm:
81 case llvm::Triple::armeb:
82 case llvm::Triple::thumb:
83 case llvm::Triple::thumbeb: {
84 arm::FloatABI ABI = arm::getARMFloatABI(ToolChain, Args);
85
86 if (ABI == arm::FloatABI::Hard)
87 CmdArgs.push_back("-mfpu=vfp");
88 else
89 CmdArgs.push_back("-mfpu=softvfp");
90
91 CmdArgs.push_back("-meabi=5");
92 break;
93 }
94 case llvm::Triple::sparcv9: {
95 std::string CPU = getCPUName(D, Args, Triple);
96 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
97 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
98 break;
99 }
100 }
101
102 for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
103 options::OPT_fdebug_prefix_map_EQ)) {
104 StringRef Map = A->getValue();
105 if (!Map.contains('='))
106 D.Diag(diag::err_drv_invalid_argument_to_option)
107 << Map << A->getOption().getName();
108 else {
109 CmdArgs.push_back(Args.MakeArgString("--debug-prefix-map"));
110 CmdArgs.push_back(Args.MakeArgString(Map));
111 }
112 A->claim();
113 }
114
115 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
116
117 CmdArgs.push_back("-o");
118 CmdArgs.push_back(Output.getFilename());
119
120 for (const auto &II : Inputs)
121 CmdArgs.push_back(II.getFilename());
122
123 const char *Exec = Args.MakeArgString(ToolChain.GetProgramPath("as"));
124 C.addCommand(std::make_unique<Command>(JA, *this,
125 ResponseFileSupport::AtFileCurCP(),
126 Exec, CmdArgs, Inputs, Output));
127}
128
129void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
130 const InputInfo &Output,
131 const InputInfoList &Inputs,
132 const ArgList &Args,
133 const char *LinkingOutput) const {
134 const auto &ToolChain = static_cast<const FreeBSD &>(getToolChain());
135 const Driver &D = ToolChain.getDriver();
136 const llvm::Triple &Triple = ToolChain.getTriple();
137 const llvm::Triple::ArchType Arch = ToolChain.getArch();
138 const bool IsPIE =
139 !Args.hasArg(options::OPT_shared) &&
140 (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault(Args));
141 ArgStringList CmdArgs;
142
143 // Silence warning for "clang -g foo.o -o foo"
144 Args.ClaimAllArgs(options::OPT_g_Group);
145 // and "clang -emit-llvm foo.o -o foo"
146 Args.ClaimAllArgs(options::OPT_emit_llvm);
147 // and for "clang -w foo.o -o foo". Other warning options are already
148 // handled somewhere else.
149 Args.ClaimAllArgs(options::OPT_w);
150
151 if (!D.SysRoot.empty())
152 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
153
154 if (IsPIE)
155 CmdArgs.push_back("-pie");
156
157 CmdArgs.push_back("--eh-frame-hdr");
158 if (Args.hasArg(options::OPT_static)) {
159 CmdArgs.push_back("-Bstatic");
160 } else {
161 if (Args.hasArg(options::OPT_rdynamic))
162 CmdArgs.push_back("-export-dynamic");
163 if (Args.hasArg(options::OPT_shared)) {
164 CmdArgs.push_back("-shared");
165 } else if (!Args.hasArg(options::OPT_r)) {
166 CmdArgs.push_back("-dynamic-linker");
167 CmdArgs.push_back("/libexec/ld-elf.so.1");
168 }
169 if (Arch == llvm::Triple::arm || Triple.isX86())
170 CmdArgs.push_back("--hash-style=both");
171 CmdArgs.push_back("--enable-new-dtags");
172 }
173
174 // Explicitly set the linker emulation for platforms that might not
175 // be the default emulation for the linker.
176 switch (Arch) {
177 case llvm::Triple::x86:
178 CmdArgs.push_back("-m");
179 CmdArgs.push_back("elf_i386_fbsd");
180 break;
181 case llvm::Triple::ppc:
182 CmdArgs.push_back("-m");
183 CmdArgs.push_back("elf32ppc_fbsd");
184 break;
185 case llvm::Triple::ppcle:
186 CmdArgs.push_back("-m");
187 // Use generic -- only usage is for freestanding.
188 CmdArgs.push_back("elf32lppc");
189 break;
190 case llvm::Triple::mips:
191 CmdArgs.push_back("-m");
192 CmdArgs.push_back("elf32btsmip_fbsd");
193 break;
194 case llvm::Triple::mipsel:
195 CmdArgs.push_back("-m");
196 CmdArgs.push_back("elf32ltsmip_fbsd");
197 break;
198 case llvm::Triple::mips64:
199 CmdArgs.push_back("-m");
200 if (tools::mips::hasMipsAbiArg(Args, "n32"))
201 CmdArgs.push_back("elf32btsmipn32_fbsd");
202 else
203 CmdArgs.push_back("elf64btsmip_fbsd");
204 break;
205 case llvm::Triple::mips64el:
206 CmdArgs.push_back("-m");
207 if (tools::mips::hasMipsAbiArg(Args, "n32"))
208 CmdArgs.push_back("elf32ltsmipn32_fbsd");
209 else
210 CmdArgs.push_back("elf64ltsmip_fbsd");
211 break;
212 case llvm::Triple::riscv64:
213 CmdArgs.push_back("-m");
214 CmdArgs.push_back("elf64lriscv");
215 break;
216 case llvm::Triple::loongarch32:
217 CmdArgs.push_back("-m");
218 CmdArgs.push_back("elf32loongarch");
219 break;
220 case llvm::Triple::loongarch64:
221 CmdArgs.push_back("-m");
222 CmdArgs.push_back("elf64loongarch");
223 break;
224 default:
225 break;
226 }
227
228 if (Triple.isLoongArch64() || Triple.isRISCV64()) {
229 CmdArgs.push_back("-X");
230 if (Args.hasArg(options::OPT_mno_relax))
231 CmdArgs.push_back("--no-relax");
232 }
233
234 if (Arg *A = Args.getLastArg(options::OPT_G)) {
235 if (ToolChain.getTriple().isMIPS()) {
236 StringRef v = A->getValue();
237 CmdArgs.push_back(Args.MakeArgString("-G" + v));
238 A->claim();
239 }
240 }
241
242 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
243 if (Output.isFilename()) {
244 CmdArgs.push_back("-o");
245 CmdArgs.push_back(Output.getFilename());
246 }
247
248 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
249 options::OPT_r)) {
250 const char *crt1 = nullptr;
251 if (!Args.hasArg(options::OPT_shared)) {
252 if (Args.hasArg(options::OPT_pg))
253 crt1 = "gcrt1.o";
254 else if (IsPIE)
255 crt1 = "Scrt1.o";
256 else
257 crt1 = "crt1.o";
258 }
259 if (crt1)
260 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt1)));
261
262 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
263
264 const char *crtbegin = nullptr;
265 if (Args.hasArg(options::OPT_static))
266 crtbegin = "crtbeginT.o";
267 else if (Args.hasArg(options::OPT_shared) || IsPIE)
268 crtbegin = "crtbeginS.o";
269 else
270 crtbegin = "crtbegin.o";
271
272 CmdArgs.push_back(Args.MakeArgString(ToolChain.