[llvm] [llvm-readobj][ELF] Implement JSON output for --dynamic-table (PR #95976)

[James Henderson via llvm-commits]

================
@@ -138,6 +140,361 @@
 # GNU64-NEXT:  0x0000000076543210 (<unknown:>0x76543210) 0x5555666677778888
 # GNU64-NEXT:  0x0000000000000000 (NULL)                 0x0
 
+#      JSON64:"DynamicSection": [
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 1,
+# JSON64-NEXT:      "Type": "NEEDED",
+# JSON64-NEXT:      "Value": 1,
+# JSON64-NEXT:      "Library": "D"
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 2,
+# JSON64-NEXT:      "Type": "PLTRELSZ",
+# JSON64-NEXT:      "Value": 16
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 3,
+# JSON64-NEXT:      "Type": "PLTGOT",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 4,
+# JSON64-NEXT:      "Type": "HASH",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 5,
+# JSON64-NEXT:      "Type": "STRTAB",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 6,
+# JSON64-NEXT:      "Type": "SYMTAB",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 7,
+# JSON64-NEXT:      "Type": "RELA",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 8,
+# JSON64-NEXT:      "Type": "RELASZ",
+# JSON64-NEXT:      "Value": 16
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 9,
+# JSON64-NEXT:      "Type": "RELAENT",
+# JSON64-NEXT:      "Value": 1929
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 10,
+# JSON64-NEXT:      "Type": "STRSZ",
+# JSON64-NEXT:      "Value": 16
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 11,
+# JSON64-NEXT:      "Type": "SYMENT",
+# JSON64-NEXT:      "Value": 2439
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 12,
+# JSON64-NEXT:      "Type": "INIT",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 13,
+# JSON64-NEXT:      "Type": "FINI",
+# JSON64-NEXT:      "Value": 4096
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 14,
+# JSON64-NEXT:      "Type": "SONAME",
+# JSON64-NEXT:      "Value": 3,
+# JSON64-NEXT:      "Name": "U"
+# JSON64-NEXT:  },
+# JSON64-NEXT:  {
+# JSON64-NEXT:      "Tag": 15,
+# JSON64-NEXT:      "Type": "RPATH",
+# JSON64-NEXT:      "Value": 5,
+# JSON64-NEXT:      "Path": [
+# JSON64-NEXT:          "f"
----------------
jh7370 wrote:

Here and for RUNPATH, you should probably have multiple elements in the path string. That will impact the output of the other test cases in this file, so I'm okay if you want to defer it to the follow-up patch I mention in the out-of-line comment, if you prefer.

https://github.com/llvm/llvm-project/pull/95976