[PATCH] readelf: Handle 0 sh_entsize of GOT sections for x86

[H.J. Lu]

Some linker sets sh_entsize on .got and .got.plt sections, for example
x86-64 Google chrome browser:

$ readelf -SW /opt/google/chrome/chrome | grep got
  [27] .got              PROGBITS        000000000fb29fc0 fb27fc0 001be0 00  WA  0   0  8
  [28] .got.plt          PROGBITS        000000000fb2bba0 fb29ba0 0029a8 00  WA  0   0  8
$

If sh_entsize of GOT sections is 0 for x86, assume 4 for i386 and 8 for
x86-64.

	PR binutils/33368
	* readelf.c (process_got_section_contents): Handle 0 sh_entsize
	of GOT sections for i386 and x86-64.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
 binutils/readelf.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/binutils/readelf.c b/binutils/readelf.c
index 4b1a26602c2..c7a66d2a8e0 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -21150,6 +21150,24 @@ process_got_section_contents (Filedata * filedata)
 	  }
 
 	uint32_t entsz = section->sh_entsize;
+	/* NB: Some linker sets sh_entsize on .got and .got.plt
+	   sections, for example x86-64 Google chrome browser.  */
+	if (entsz == 0)
+	  switch (filedata->file_header.e_machine)
+	    {
+	    default:
+	      warn (_("Can't determine section '%s' sh_entsize\n"),
+		    name);
+	      res = false;
+	      goto out;
+	    case EM_386:
+	      entsz = 4;
+	      break;
+	    case EM_X86_64:
+	      entsz = 8;
+	      break;
+	    }
+
 	entries = section->sh_size / entsz;
 	if (entries == 1)
 	  printf (_("\nGlobal Offset Table '%s' contains 1 entry:\n"),
-- 
2.51.0