[Object] Add {begin,end}_dynamic_symbols stubs and implementation for ELF.

Add -D option to llvm-nm to dump dynamic symbols.

Patch by David Meyer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151600 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 31 insertions, 0 deletions

diff --git a/test/Object/Inputs/shared-object-test.elf-i386 b/test/Object/Inputs/shared-object-test.elf-i386
new file mode 100644
index 00000000000..5129cc40bff
--- /dev/null
+++ b/test/Object/Inputs/shared-object-test.elf-i386
diff --git a/test/Object/Inputs/shared-object-test.elf-x86-64 b/test/Object/Inputs/shared-object-test.elf-x86-64
new file mode 100644
index 00000000000..71081ebfd16
--- /dev/null
+++ b/test/Object/Inputs/shared-object-test.elf-x86-64
diff --git a/test/Object/Inputs/shared.ll b/test/Object/Inputs/shared.ll
new file mode 100644
index 00000000000..3db0f82d9cd
--- /dev/null
+++ b/test/Object/Inputs/shared.ll
@@ -0,0 +1,31 @@
+; How to make the shared objects from this file:
+;
+; X86-32 ELF:
+;   llc -mtriple=i386-linux-gnu shared.ll -filetype=obj -o tmp32.o -relocation-model=pic
+;   ld -melf_i386 -shared tmp32.o -o shared-object-test.elf-i386 --unresolved-symbols=ignore-all
+;
+; X86-64 ELF:
+;   llc -mtriple=x86_64-linux-gnu shared.ll -filetype=obj -o tmp64.o -relocation-model=pic
+;   ld -melf_x86_64 -shared tmp64.o -o shared-object-test.elf-x86-64 --unresolved-symbols=ignore-all
+
+@defined_sym = global i32 1, align 4
+
+@tls_sym = thread_local global i32 2, align 4
+
+@undef_sym = external global i32
+
+@undef_tls_sym = external thread_local global i32
+
+@common_sym = common global i32 0, align 4
+
+define i32 @global_func() nounwind uwtable {
+entry:
+  ret i32 0
+}
+
+declare i32 @undef_func(...)
+
+define internal i32 @local_func() nounwind uwtable {
+entry:
+  ret i32 0
+}