struct Configuration {
Symbol *EntrySym = nullptr;
InputFile *FirstElf = nullptr;
+ llvm::StringMap<uint64_t> SectionStartMap;
llvm::StringRef DynamicLinker;
llvm::StringRef Entry;
llvm::StringRef Emulation;
return StripPolicy::None;
}
+static uint64_t parseSectionAddress(StringRef S, opt::Arg *Arg) {
+ uint64_t VA = 0;
+ if (S.startswith("0x"))
+ S = S.drop_front(2);
+ if (S.getAsInteger(16, VA))
+ error("invalid argument: " + stringize(Arg));
+ return VA;
+}
+
+static StringMap<uint64_t> getSectionStartMap(opt::InputArgList &Args) {
+ StringMap<uint64_t> Ret;
+ for (auto *Arg : Args.filtered(OPT_section_start)) {
+ StringRef Name;
+ StringRef Addr;
+ std::tie(Name, Addr) = StringRef(Arg->getValue()).split('=');
+ Ret[Name] = parseSectionAddress(Addr, Arg);
+ }
+
+ if (auto *Arg = Args.getLastArg(OPT_Ttext))
+ Ret[".text"] = parseSectionAddress(Arg->getValue(), Arg);
+ if (auto *Arg = Args.getLastArg(OPT_Tdata))
+ Ret[".data"] = parseSectionAddress(Arg->getValue(), Arg);
+ if (auto *Arg = Args.getLastArg(OPT_Tbss))
+ Ret[".bss"] = parseSectionAddress(Arg->getValue(), Arg);
+ return Ret;
+}
+
// Initializes Config members by the command line options.
void LinkerDriver::readConfigs(opt::InputArgList &Args) {
for (auto *Arg : Args.filtered(OPT_L))
if (!RPaths.empty())
Config->RPath = llvm::join(RPaths.begin(), RPaths.end(), ":");
+ Config->SectionStartMap = getSectionStartMap(Args);
+
if (auto *Arg = Args.getLastArg(OPT_m)) {
// Parse ELF{32,64}{LE,BE} and CPU type.
StringRef S = Arg->getValue();
def O: Joined<["-"], "O">, HelpText<"Optimize output file size">;
+def Tbss: J<"Tbss=">, HelpText<"Same as --section-start with .bss as the sectionname">;
+
+def Tdata: J<"Tdata=">, HelpText<"Same as --section-start with .data as the sectionname">;
+
+def Ttext: J<"Ttext=">, HelpText<"Same as --section-start with .text as the sectionname">;
+
def allow_multiple_definition: F<"allow-multiple-definition">,
HelpText<"Allow multiple definitions">;
def script: S<"script">, HelpText<"Read linker script">;
+def section_start: S<"section-start">, MetaVarName<"<address>">,
+ HelpText<"Set address of section">;
+
def shared: F<"shared">, HelpText<"Build a shared object">;
def soname: J<"soname=">, HelpText<"Set DT_SONAME">;
if (Sec->PageAlign)
Alignment = std::max<uintX_t>(Alignment, Target->PageSize);
+ auto I = Config->SectionStartMap.find(Sec->getName());
+ if (I != Config->SectionStartMap.end())
+ VA = I->second;
+
// We only assign VAs to allocated sections.
if (needsPtLoad(Sec)) {
VA = alignTo(VA, Alignment);
--- /dev/null
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+# RUN: ld.lld %t.o --section-start .text=0x100000 \
+# RUN: --section-start .data=0x110000 --section-start .bss=0x200000 -o %t
+# RUN: llvm-objdump -section-headers %t | FileCheck %s
+
+# CHECK: Sections:
+# CHECK-NEXT: Idx Name Size Address Type
+# CHECK-NEXT: 0 00000000 0000000000000000
+# CHECK-NEXT: 1 .text 00000001 0000000000100000 TEXT DATA
+# CHECK-NEXT: 2 .data 00000004 0000000000110000 DATA
+# CHECK-NEXT: 3 .bss 00000004 0000000000200000 BSS
+
+## The same, but dropped "0x" prefix.
+# RUN: ld.lld %t.o --section-start .text=100000 \
+# RUN: --section-start .data=110000 --section-start .bss=0x200000 -o %t1
+# RUN: llvm-objdump -section-headers %t1 | FileCheck %s
+
+## Use -Ttext, -Tdata, -Tbss as replacement for --section-start:
+# RUN: ld.lld %t.o -Ttext=0x100000 -Tdata=0x110000 -Tbss=0x200000 -o %t4
+# RUN: llvm-objdump -section-headers %t4 | FileCheck %s
+
+## The same, but dropped "0x" prefix.
+# RUN: ld.lld %t.o -Ttext=100000 -Tdata=110000 -Tbss=200000 -o %t5
+# RUN: llvm-objdump -section-headers %t5 | FileCheck %s
+
+## Errors:
+# RUN: not ld.lld %t.o --section-start .text100000 -o %t2 2>&1 \
+# RUN: | FileCheck -check-prefix=ERR1 %s
+# ERR1: invalid argument: --section-start .text100000
+
+# RUN: not ld.lld %t.o --section-start .text=1Q0000 -o %t3 2>&1 \
+# RUN: | FileCheck -check-prefix=ERR2 %s
+# ERR2: invalid argument: --section-start .text=1Q0000
+
+# RUN: not ld.lld %t.o -Ttext=1w0000 -o %t6 2>&1 \
+# RUN: | FileCheck -check-prefix=ERR3 %s
+# ERR3: invalid argument: -Ttext=1w0000
+
+# RUN: not ld.lld %t.o -Tbss=1w0000 -o %t6 2>&1 \
+# RUN: | FileCheck -check-prefix=ERR4 %s
+# ERR4: invalid argument: -Tbss=1w0000
+
+# RUN: not ld.lld %t.o -Tdata=1w0000 -o %t6 2>&1 \
+# RUN: | FileCheck -check-prefix=ERR5 %s
+# ERR5: invalid argument: -Tdata=1w0000
+
+.text
+.globl _start
+_start:
+ nop
+
+.data
+.long 0
+
+.bss
+.zero 4