[elfabi] Add support for reading DT_SONAME from binarieslinaro-local/ci/tcwg_kernel/llvm-master-aarch64-next-allnoconfig

This change gives the llvm-elfabi tool the ability to read DT_SONAME from a binary ELF file into an ELFStub.

Added:

 - DynamicEntries struct for storing dynamic entries that are relevant to elfabi.
 - terminatedSubstr() retrieves a null-terminated substring from a StringRef.
 - appendToError() appends a string to an error, allowing more specific error messages.

Differential Revision: https://reviews.llvm.org/D55629

1 files changed, 33 insertions, 1 deletions

diff --git a/llvm/test/tools/llvm-elfabi/binary-read-arch.test b/llvm/test/tools/llvm-elfabi/binary-read-arch.test
index ecb2fb81446..f2c2d8bd56d 100644
--- a/llvm/test/tools/llvm-elfabi/binary-read-arch.test
+++ b/llvm/test/tools/llvm-elfabi/binary-read-arch.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-elfabi %t --emit-tbe=- | FileCheck %s
+# RUN: llvm-elfabi --elf %t --emit-tbe=- | FileCheck %s
 
 !ELF
 FileHeader:
@@ -7,6 +7,38 @@ FileHeader:
   Data:            ELFDATA2LSB
   Type:            ET_DYN
   Machine:         EM_X86_64
+Sections:
+  - Name:            .dynstr
+    Type:            SHT_STRTAB
+    Flags:           [ SHF_ALLOC ]
+    Address:         0x0000
+    Content:         "00"
+  - Name:            .dynamic
+    Type:            SHT_DYNAMIC
+    Flags:           [ SHF_ALLOC ]
+    Address:         0x0008
+    AddressAlign:    8
+    Content:         "0a0000000000000001000000000000000500000000000000000000000000000000000000000000000000000000000000"
+      # DT_STRSZ      1 (0x1)
+      # DT_STRTAB     0x0
+      # DT_NULL       0x0
+    Size:            48
+    Link:            .dynstr
+ProgramHeaders:
+  - Type: PT_LOAD
+    Flags: [ PF_R ]
+    VAddr: 0x0000
+    PAddr: 0x0000
+    Align: 8
+    Sections:
+      - Section: .dynstr
+      - Section: .dynamic
+  - Type: PT_DYNAMIC
+    Flags: [ PF_X, PF_R ]
+    VAddr: 0x0008
+    PAddr: 0x0008
+    Sections:
+      - Section: .dynamic
 
 # CHECK:      --- !tapi-tbe
 # CHECK-NEXT: TbeVersion: {{[1-9]\d*\.(0|([1-9]\d*))}}