[elfabi] Add support for reading DT_NEEDED from binaries
This patch gives elfabi the ability to read DT_NEEDED entries from ELF binaries
to populate NeededLibs in TextAPI's ELFStub.
Differential Revision: https://reviews.llvm.org/D55852
llvm-svn: 351592
diff --git a/llvm/test/tools/llvm-elfabi/binary-read-neededlibs.test b/llvm/test/tools/llvm-elfabi/binary-read-neededlibs.test
new file mode 100644
index 0000000..4245d19
--- /dev/null
+++ b/llvm/test/tools/llvm-elfabi/binary-read-neededlibs.test
@@ -0,0 +1,47 @@
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-elfabi --elf %t --emit-tbe=- | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_DYN
+ Machine: EM_X86_64
+Sections:
+ - Name: .dynstr
+ Type: SHT_STRTAB
+ Flags: [ SHF_ALLOC ]
+ Address: 0x1000
+ # "\0libfoo.so\0libbar.so\0somelib.so\0foo\0"
+ Content: "006c6962666f6f2e736f006c69626261722e736f00736f6d656c69622e736f00666f6f00"
+ - Name: .dynamic
+ Type: SHT_DYNAMIC
+ Flags: [ SHF_ALLOC ]
+ Address: 0x1024
+ Content: "010000000000000001000000000000000e00000000000000150000000000000001000000000000000b000000000000000a0000000000000024000000000000000500000000000000001000000000000000000000000000000000000000000000"
+ # DT_NEEDED 1 (0x01)
+ # DT_SONAME 21 (0x15)
+ # DT_NEEDED 11 (0x0b)
+ # DT_STRSZ 36 (0x24)
+ # DT_STRTAB 0x1000
+ # DT_NULL 0x0
+ Size: 96
+ProgramHeaders:
+ - Type: PT_LOAD
+ Flags: [ PF_R ]
+ VAddr: 0x1000
+ PAddr: 0x1000
+ Align: 8
+ Sections:
+ - Section: .dynstr
+ - Section: .dynamic
+ - Type: PT_DYNAMIC
+ Flags: [ PF_X, PF_R ]
+ VAddr: 0x1024
+ PAddr: 0x1024
+ Sections:
+
+# CHECK: NeededLibs:
+# CHECK-NEXT: - libfoo.so{{$}}
+# CHECK-NEXT: - libbar.so{{$}}
+# CHECK-NEXT: Symbols: {}