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This commit is contained in:
Rui Ueyama 2020-11-19 13:41:22 +09:00
parent fde6b02df6
commit 8f5ec2b5ca
7 changed files with 59 additions and 6 deletions
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6
object_file.cc
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@ -30,12 +30,14 @@ void ObjectFile::initialize_soname() {
CHECK(obj.template getSectionContentsAsArray<ELF64LE::Dyn>(shdr), this);
for (const ELF64LE::Dyn &dyn : tags) {
if (dyn.d_tag == DT_NEEDED) {
if (dyn.d_tag == DT_SONAME) {
this->soname = StringRef(symbol_strtab.data() + dyn.d_un.d_val);
return;
}
}
}
this->soname = this->name;
}
void ObjectFile::initialize_sections() {
@ -340,7 +342,7 @@ void ObjectFile::maybe_override_symbol(const ELF64LE::Sym &esym, Symbol &sym, in
sym.input_section = isec;
sym.piece_ref = sym_pieces[idx];
sym.value = esym.st_value;
sym.type = esym.getType();
sym.type = (is_dso && esym.getType() == STT_GNU_IFUNC) ? STT_FUNC : esym.getType();
sym.binding = esym.getBinding();
sym.visibility = esym.getVisibility();
sym.esym = &esym;

1
output_chunks.cc
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@ -267,6 +267,7 @@ static std::vector<u64> create_dynamic_section() {
if (!file->soname.empty()) {
define(DT_NEEDED, i);
i += file->soname.size() + 1;
llvm::outs() << "file=" << file->name << " soname=" << file->soname << "\n";
}
}

7
test/dynamic.s
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@ -11,8 +11,9 @@
// RUN: /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
// RUN: readelf --dynamic %t.exe | FileCheck %s
// CHECK: Dynamic section at offset 0x2080 contains 19 entries:
// CHECK: Dynamic section at offset 0x2080 contains 20 entries:
// CHECK: Tag Type Name/Value
// CHECK: 0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
// CHECK: 0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
// CHECK: 0x0000000000000001 (NEEDED) Shared library: [ld-linux-x86-64.so.2]
// CHECK: 0x0000000000000007 (RELA) 0x2003a0
@ -25,8 +26,8 @@
// CHECK: 0x0000000000000006 (SYMTAB) 0x200418
// CHECK: 0x000000000000000b (SYMENT) 24 (bytes)
// CHECK: 0x0000000000000005 (STRTAB) 0x2004d8
// CHECK: 0x000000000000000a (STRSZ) 116 (bytes)
// CHECK: 0x0000000000000004 (HASH) 0x20054c
// CHECK: 0x000000000000000a (STRSZ) 129 (bytes)
// CHECK: 0x0000000000000004 (HASH) 0x20055c
// CHECK: 0x0000000000000019 (INIT_ARRAY) 0x202028
// CHECK: 0x000000000000001b (INIT_ARRAYSZ) 8 (bytes)
// CHECK: 0x000000000000001a (FINI_ARRAY) 0x202020

25
test/ifunc-dso.s Normal file
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@ -0,0 +1,25 @@
// RUN: cc -shared -fPIC -o %t.so %p/input/ifunc-dso.s
// RUN: cc -o %t.o -c %s
// RUN: mold -o %t.exe /usr/lib/x86_64-linux-gnu/crt1.o \
// RUN: /usr/lib/x86_64-linux-gnu/crti.o \
// RUN: /usr/lib/gcc/x86_64-linux-gnu/9/crtbegin.o \
// RUN: %t.o \
// RUN: %t.so \
// RUN: /usr/lib/gcc/x86_64-linux-gnu/9/libgcc.a \
// RUN: /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 \
// RUN: /lib/x86_64-linux-gnu/libc.so.6 \
// RUN: /usr/lib/x86_64-linux-gnu/libc_nonshared.a \
// RUN: /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 \
// RUN: /usr/lib/gcc/x86_64-linux-gnu/9/crtend.o \
// RUN: /usr/lib/x86_64-linux-gnu/crtn.o
// RUN: %t.exe | grep 'Hello world'
.text
.globl main
main:
pushq %rbp
movq %rsp, %rbp
call foobar@PLT
xor %rax, %rax
popq %rbp
ret

23
test/input/ifunc-dso.s Normal file
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@ -0,0 +1,23 @@
.text
real_foobar:
lea .Lmsg(%rip), %rdi
xor %rax, %rax
call printf
xor %rax, %rax
ret
.globl resolve_foobar
resolve_foobar:
pushq %rbp
movq %rsp, %rbp
movq real_foobar@GOTPCREL(%rip), %rax
popq %rbp
ret
.globl foobar
.type foobar, @gnu_indirect_function
.set foobar, resolve_foobar
.data
.Lmsg:
.string "Hello world\n"

1
test/lit.cfg.py
View File

@ -12,6 +12,7 @@ import lit.util
config.name = 'mold'
config.suffixes = ['.s', '.test']
config.excludes = ['input']
config.test_format = lit.formats.ShTest(False)
config.test_source_root = os.path.dirname(__file__)

2
test/plt.s
View File

@ -15,7 +15,7 @@
// SECTIONS: [19] .got.plt PROGBITS 0000000000202058 00002058
// SECTIONS: 0000000000000028 0000000000000000 WA 0 0 8
// SECTIONS: [20] .dynamic DYNAMIC 0000000000202080 00002080
// SECTIONS: 0000000000000130 0000000000000010 WA 9 0 8
// SECTIONS: 0000000000000140 0000000000000010 WA 9 0 8
// RUN: readelf -x .got.plt %t.exe | FileCheck --check-prefix=GOTPLT %s
// GOTPLT: 0x00202058 80202000 00000000 00000000 00000000