From 4777a84399a5d745283944ce6cd962442b5f504a Mon Sep 17 00:00:00 2001
From: Armando Montanez <amontanez@google.com>
Date: Wed, 16 Jan 2019 17:47:16 +0000
Subject: [elfabi] Add support for reading DT_SONAME from binaries

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
---
 .../llvm-elfabi/binary-read-soname-no-null.test    | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 llvm/test/tools/llvm-elfabi/binary-read-soname-no-null.test

(limited to 'llvm/test/tools/llvm-elfabi/binary-read-soname-no-null.test')

diff --git a/llvm/test/tools/llvm-elfabi/binary-read-soname-no-null.test b/llvm/test/tools/llvm-elfabi/binary-read-soname-no-null.test
new file mode 100644
index 00000000000..224407d9310
--- /dev/null
+++ b/llvm/test/tools/llvm-elfabi/binary-read-soname-no-null.test
@@ -0,0 +1,45 @@
+# RUN: yaml2obj %s > %t
+# RUN: not llvm-elfabi --elf %t --emit-tbe=%t.tbe 2>&1 | 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
+#                     \0 b a z\0 s o m e l i b . s o z z z
+    Content:         "0062617a00736f6d656c69622e736f7a7a7a"
+  - Name:            .dynamic
+    Type:            SHT_DYNAMIC
+    Flags:           [ SHF_ALLOC ]
+    Address:         0x1018
+    AddressAlign:    8
+    Content:         "0e0000000000000005000000000000000a000000000000000f000000000000000500000000000000001000000000000000000000000000000000000000000000"
+      # DT_SONAME     5 (0x05)
+      # DT_STRSZ      15 (0x0F)
+      # DT_STRTAB     0x1000
+      # DT_NULL       0x0
+    Size:            64
+    Link:            .dynstr
+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: 0x1018
+    PAddr: 0x1018
+    Sections:
+      - Section: .dynamic
+
+# CHECK: String overran bounds of string table (no null terminator) when reading DT_SONAME
-- 
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