From: H.J. Lu <hjl.tools@gmail.com>
Date: Thu, 4 Sep 2025 13:05:33 +0000 (-0700)
Subject: readelf: Handle 0 sh_entsize of GOT sections
X-Git-Tag: gdb-17-branchpoint~8
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3e1716c9fc203f5654d49c17b160a466c78a2a2c;p=thirdparty%2Fbinutils-gdb.git

readelf: Handle 0 sh_entsize of GOT sections

Gold, lld and mold set sh_entsize to 0 on .got and .got.plt sections.
If sh_entsize of GOT sections is 0, assume 8 for ELFCLASS64 and 4 for
ELFCLASS32, except for x32 which uses 8.

	PR binutils/33368
	* readelf.c (process_got_section_contents): Handle 0 sh_entsize
	of GOT sections.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---

diff --git a/binutils/readelf.c b/binutils/readelf.c
index 705b7761bc8..03c4520ff92 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -21075,6 +21075,25 @@ process_got_section_contents (Filedata * filedata)
 	  }
 
 	uint32_t entsz = section->sh_entsize;
+	/* NB: Gold, lld and mold set sh_entsize to 0 on .got and
+	   .got.plt sections.  */
+	if (entsz == 0)
+	  {
+	    if (is_32bit_elf)
+	      switch (filedata->file_header.e_machine)
+		{
+		default:
+		  entsz = 4;
+		  break;
+		case EM_X86_64:
+		  /* x32 uses 8 byte GOT sh_entsize.  */
+		  entsz = 8;
+		  break;
+		}
+	    else
+	      entsz = 8;
+	  }
+
 	entries = section->sh_size / entsz;
 	if (entries == 1)
 	  printf (_("\nGlobal Offset Table '%s' contains 1 entry:\n"),