MIPS/BFD: Correctly report unsupported `.reginfo' section size

Report an error when an unsupported `.reginfo' section size is found in
`_bfd_mips_elf_section_processing', removing an assertion that triggers
at elfxx-mips.c:7105 in GAS when assembling input like:

	.section	.reginfo
	.word		0xdeadbeef

and in `objcopy --rename-section' when renaming an incorrectly sized
section to `.reginfo'.

	bfd/
	* elfxx-mips.c (_bfd_mips_elf_section_processing): For
	SHT_MIPS_REGINFO sections don't assert the correct size and
	report an error instead.

	binutils/
	* testsuite/binutils-all/mips/mips-reginfo.d: New test.
	* testsuite/binutils-all/mips/mips-reginfo-n32.d: New test.
	* testsuite/binutils-all/mips/mips-reginfo.s: New test source.
	* testsuite/binutils-all/mips/mips.exp: Run the new tests.

	gas/
	* testsuite/gas/mips/reginfo-2.d: New test.
	* testsuite/gas/mips/reginfo-2-n32.d: New test.
	* testsuite/gas/mips/reginfo-2.l: New test stderr output.
	* testsuite/gas/mips/reginfo-2.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new tests.

bfd/ChangeLog

@@ -1,3 +1,9 @@
+2018-02-05  Maciej W. Rozycki  <macro@mips.com>
+
+	* elfxx-mips.c (_bfd_mips_elf_section_processing): For
+	SHT_MIPS_REGINFO sections don't assert the correct size and
+	report an error instead.
+
 2018-02-05  Maciej W. Rozycki  <macro@mips.com>
 
 	* elf.c (_bfd_elf_write_object_contents): Propagate a failure

bfd/elfxx-mips.c

@@ -7102,9 +7102,18 @@ _bfd_mips_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *hdr)
     {
       bfd_byte buf[4];
 
-      BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo));
       BFD_ASSERT (hdr->contents == NULL);
 
+      if (hdr->sh_size != sizeof (Elf32_External_RegInfo))
+	{
+	  _bfd_error_handler
+	    (_("%B: Incorrect `.reginfo' section size; expected %Lu, got %Lu"),
+	     abfd, (bfd_size_type) sizeof (Elf32_External_RegInfo),
+	     hdr->sh_size);
+	  bfd_set_error (bfd_error_bad_value);
+	  return FALSE;
+	}
+
       if (bfd_seek (abfd,
 		    hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4,
 		    SEEK_SET) != 0)

binutils/ChangeLog

@@ -1,3 +1,10 @@
+2018-02-05  Maciej W. Rozycki  <macro@mips.com>
+
+	* testsuite/binutils-all/mips/mips-reginfo.d: New test.
+	* testsuite/binutils-all/mips/mips-reginfo-n32.d: New test.
+	* testsuite/binutils-all/mips/mips-reginfo.s: New test source.
+	* testsuite/binutils-all/mips/mips.exp: Run the new tests.
+
 2018-02-05  Maciej W. Rozycki  <macro@mips.com>
 
 	* testsuite/config/default.exp (binutils_run): Document

binutils/testsuite/binutils-all/mips/mips-reginfo-n32.d

@@ -0,0 +1,7 @@
+#PROG: objcopy
+#name: MIPS objcopy .reginfo section size (n32)
+#as: -n32 -mips3
+#objcopy: --rename-section .foo=.reginfo
+#source: mips-reginfo.s
+#error: \A[^\n]*: Incorrect `\.reginfo' section size; expected 24, got 4\n
+#error:   [^\n]*: Bad value\Z

binutils/testsuite/binutils-all/mips/mips-reginfo.d

@@ -0,0 +1,6 @@
+#PROG: objcopy
+#name: MIPS objcopy .reginfo section size
+#as: -32
+#objcopy: --rename-section .foo=.reginfo
+#error: \A[^\n]*: Incorrect `\.reginfo' section size; expected 24, got 4\n
+#error:   [^\n]*: Bad value\Z

binutils/testsuite/binutils-all/mips/mips-reginfo.s

@@ -0,0 +1,2 @@
+	.section .foo, "a"
+	.word	0xdeadbeef

binutils/testsuite/binutils-all/mips/mips.exp

@@ -60,3 +60,8 @@ if $has_newabi {
     run_dump_test "mips-note-2r-n32"
     run_dump_test "mips-note-2r-n64"
 }
+
+run_dump_test "mips-reginfo"
+if $has_newabi {
+    run_dump_test "mips-reginfo-n32"
+}

gas/ChangeLog

@@ -1,3 +1,11 @@
+2018-02-05  Maciej W. Rozycki  <macro@mips.com>
+
+	* testsuite/gas/mips/reginfo-2.d: New test.
+	* testsuite/gas/mips/reginfo-2-n32.d: New test.
+	* testsuite/gas/mips/reginfo-2.l: New test stderr output.
+	* testsuite/gas/mips/reginfo-2.s: New test source.
+	* testsuite/gas/mips/mips.exp: Run the new tests.
+
 2018-02-05  Nick Clifton  <nickc@redhat.com>
 
 	* po/ru.po: Updated Russian translation.

gas/testsuite/gas/mips/mips.exp

@@ -1494,6 +1494,10 @@ if { [istarget mips*-*-vxworks*] } {
     run_dump_test "pr12915"
     run_dump_test "reginfo-1a"
     run_dump_test "reginfo-1b"
+    run_dump_test "reginfo-2"
+    if $has_newabi {
+	run_dump_test "reginfo-2-n32"
+    }
 
     run_dump_test "micromips"
     run_dump_test "micromips-trap"

gas/testsuite/gas/mips/reginfo-2-n32.d

@@ -0,0 +1,4 @@
+#name: MIPS assembled .reginfo section size (n32)
+#as: -n32 -mips3
+#source: reginfo-2.s
+#error-output: reginfo-2.l

gas/testsuite/gas/mips/reginfo-2.d

@@ -0,0 +1,3 @@
+#name: MIPS assembled .reginfo section size
+#as: -32
+#error-output: reginfo-2.l

gas/testsuite/gas/mips/reginfo-2.l

@@ -0,0 +1,3 @@
+.*: Incorrect `\.reginfo' section size; expected 24, got 28
+.*: Assembler messages:
+.*: Fatal error: can't close .*: Bad value

gas/testsuite/gas/mips/reginfo-2.s

@@ -0,0 +1,2 @@
+	.section .reginfo
+	.word	0xdeadbeef