[PATCH] Fix segfault when .plt section does not exist

[Palmer Dabbelt <palmer@dabbelt.com>]

From: Andrew Waterman <andrew@sifive.com>

bfd/ChangeLog

2017-02-07  Andrew Waterman  <andrew@sifive.com>

	* elfnn-riscv.c (riscv_elf_finish_dynamic_sections): Only write PLT
	entry size if PLT header is written.
---
 bfd/ChangeLog     | 5 +++++
 bfd/elfnn-riscv.c | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 244d190..6c21e77 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2017-02-07  Andrew Waterman  <andrew@sifive.com>
+
+	* elfnn-riscv.c (riscv_elf_finish_dynamic_sections): Only write PLT
+	entry size if PLT header is written.
+
 2017-02-03  Alan Modra  <amodra@gmail.com>
 
 	* elf32-hppa.c (ensure_undef_weak_dynamic): New function.
diff --git a/bfd/elfnn-riscv.c b/bfd/elfnn-riscv.c
index f414429..210007d 100644
--- a/bfd/elfnn-riscv.c
+++ b/bfd/elfnn-riscv.c
@@ -2502,10 +2502,10 @@ riscv_elf_finish_dynamic_sections (bfd *output_bfd,
 
 	  for (i = 0; i < PLT_HEADER_INSNS; i++)
 	    bfd_put_32 (output_bfd, plt_header[i], splt->contents + 4*i);
-	}
 
-      elf_section_data (splt->output_section)->this_hdr.sh_entsize
-	= PLT_ENTRY_SIZE;
+	  elf_section_data (splt->output_section)->this_hdr.sh_entsize
+	    = PLT_ENTRY_SIZE;
+	}
     }
 
   if (htab->elf.sgotplt)
-- 
2.10.2