Add --no-dynamic-linker option to ld, for static PIE use

Inhibits output of .interp section in ELF executables.

include/
	* bfdlink.h (struct bfd_link_info): Add "nointerp" field.
bfd/
	* elflink.c (_bfd_elf_link_create_dynamic_sections): Don't create
	.interp when info->nointerp.
	(bfd_elf_size_dynamic_sections): Adjust assert.
	* elf32-arm.c (elf32_arm_size_dynamic_sections): Don't size .interp
	when info->nointerp.
	* elf32-bfin.c (elf32_bfinfdpic_size_dynamic_sections): Likewise.
	* elf32-cr16.c (_bfd_cr16_elf_size_dynamic_sections): Likewise.
	* elf32-cris.c (elf_cris_size_dynamic_sections): Likewise.
	* elf32-frv.c (elf32_frvfdpic_size_dynamic_sections): Likewise.
	* elf32-hppa.c (elf32_hppa_size_dynamic_sections): Likewise.
	* elf32-i370.c (i370_elf_size_dynamic_sections): Likewise.
	* elf32-i386.c (elf_i386_size_dynamic_sections): Likewise.
	* elf32-lm32.c (lm32_elf_size_dynamic_sections): Likewise.
	* elf32-m32r.c (m32r_elf_size_dynamic_sections): Likewise.
	* elf32-m68k.c (elf_m68k_size_dynamic_sections): Likewise.
	* elf32-metag.c (elf_metag_size_dynamic_sections): Likewise.
	* elf32-nds32.c (nds32_elf_size_dynamic_sections): Likewise.
	* elf32-nios2.c (nios2_elf32_size_dynamic_sections): Likewise.
	* elf32-or1k.c (or1k_elf_size_dynamic_sections): Likewise.
	* elf32-ppc.c (ppc_elf_size_dynamic_sections): Likewise.
	* elf32-s390.c (elf_s390_size_dynamic_sections): Likewise.
	* elf32-score.c (s3_bfd_score_elf_size_dynamic_sections): Likewise.
	* elf32-score7.c (s7_bfd_score_elf_size_dynamic_sections): Likewise.
	* elf32-sh.c (sh_elf_size_dynamic_sections): Likewise.
	* elf32-tic6x.c (elf32_tic6x_size_dynamic_sections): Likewise.
	* elf32-tilepro.c (tilepro_elf_size_dynamic_sections): Likewise.
	* elf32-vax.c (elf_vax_size_dynamic_sections): Likewise.
	* elf32-xtensa.c (elf_xtensa_size_dynamic_sections): Likewise.
	* elf64-alpha.c (elf64_alpha_size_dynamic_sections): Likewise.
	* elf64-hppa.c (elf64_hppa_size_dynamic_sections): Likewise.
	* elf64-ppc.c (ppc64_elf_size_dynamic_sections): Likewise.
	* elf64-s390.c (elf_s390_size_dynamic_sections): Likewise.
	* elf64-sh64.c (sh64_elf64_size_dynamic_sections): Likewise.
	* elf64-x86-64.c (elf_x86_64_size_dynamic_sections): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_size_dynamic_sections): Likewise.
	* elfnn-ia64.c (elfNN_ia64_size_dynamic_sections): Likewise.
	* elfxx-mips.c (_bfd_mips_elf_size_dynamic_sections): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_size_dynamic_sections): Likewise.
	* elfxx-tilegx.c (tilegx_elf_size_dynamic_sections): Likewise.
ld/
	* ld.texinfo (--no-dynamic-linker): Document.
	* ldlex.h (enum option_values): Add OPTION_NO_DYNAMIC_LINKER.
	* lexsup.c (ld_options, parse_args): Handle --no-dynamic-linker.

4 files changed, 21 insertions, 0 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index e73abeb..e1e06b8 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,9 @@
+2015-09-20  Rich Felker  <dalias@libc.org>
+
+	* ld.texinfo (--no-dynamic-linker): Document.
+	* ldlex.h (enum option_values): Add OPTION_NO_DYNAMIC_LINKER.
+	* lexsup.c (ld_options, parse_args): Handle --no-dynamic-linker.
+
 2015-09-18  Alan Modra  <amodra@gmail.com>
 
 	* ld.texinfo: Document PowerPC64 --{no-,}save-restore-funcs.
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index c5d39d5..6b7fac8 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -1455,6 +1455,13 @@ generating dynamically linked ELF executables.  The default dynamic
 linker is normally correct; don't use this unless you know what you are
 doing.
 
+@kindex --no-dynamic-linker
+@item --no-dynamic-linker
+When producing an executable file, omit the request for a dynamic
+linker to be used at load-time.  This is only meaningful for ELF
+executables that contain dynamic relocations, and usually requires
+entry point code that is capable of processing these relocations.
+
 @kindex --fatal-warnings
 @kindex --no-fatal-warnings
 @item --fatal-warnings
diff --git a/ld/ldlex.h b/ld/ldlex.h
index 5629ef1..6f11e7b 100644
--- a/ld/ldlex.h
+++ b/ld/ldlex.h
@@ -33,6 +33,7 @@ enum option_values
   OPTION_DEFSYM,
   OPTION_DEMANGLE,
   OPTION_DYNAMIC_LINKER,
+  OPTION_NO_DYNAMIC_LINKER,
   OPTION_SYSROOT,
   OPTION_EB,
   OPTION_EL,
diff --git a/ld/lexsup.c b/ld/lexsup.c
index 5dc56dc..fdd39a7 100644
--- a/ld/lexsup.c
+++ b/ld/lexsup.c
@@ -138,6 +138,9 @@ static const struct ld_option ld_options[] =
   { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER},
     'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"),
     TWO_DASHES },
+  { {"no-dynamic-linker", no_argument, NULL, OPTION_NO_DYNAMIC_LINKER},
+    '\0', NULL, N_("Produce an executable with no program interpreter header"),
+    TWO_DASHES },
   { {"library", required_argument, NULL, 'l'},
     'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES },
   { {"library-path", required_argument, NULL, 'L'},
@@ -761,6 +764,10 @@ parse_args (unsigned argc, char **argv)
 	case 'I':		/* Used on Solaris.  */
 	case OPTION_DYNAMIC_LINKER:
 	  command_line.interpreter = optarg;
+	  link_info.nointerp = 0;
+	  break;
+	case OPTION_NO_DYNAMIC_LINKER:
+	  link_info.nointerp = 1;
 	  break;
 	case OPTION_SYSROOT:
 	  /* Already handled in ldmain.c.  */