openwrt/toolchain/binutils/patches/2.20.1/200-mips_non_pic.patch

--- a/bfd/elf32-mips.c
+++ b/bfd/elf32-mips.c
@@ -1663,6 +1663,15 @@ static const struct ecoff_debug_swap mip
 #define elf_backend_plt_readonly	1
 #define elf_backend_plt_sym_val		_bfd_mips_elf_plt_sym_val
 
+/* Most MIPS ELF files do not contain a traditional PLT; only VxWorks
+   and non-PIC dynamic executables do.  These settings only affect
+   _bfd_elf_create_dynamic_sections, which is only called when we
+   do want a traditional PLT.  */
+#undef elf_backend_want_plt_sym
+#define elf_backend_want_plt_sym		1
+#undef elf_backend_plt_readonly
+#define elf_backend_plt_readonly		1
+
 #define elf_backend_discard_info	_bfd_mips_elf_discard_info
 #define elf_backend_ignore_discarded_relocs \
 					_bfd_mips_elf_ignore_discarded_relocs
@@ -1687,6 +1696,8 @@ static const struct ecoff_debug_swap mip
 #define bfd_elf32_bfd_print_private_bfd_data \
 					_bfd_mips_elf_print_private_bfd_data
 
+#define elf_backend_plt_sym_val		_bfd_mips_elf_plt_sym_val
+
 /* Support for SGI-ish mips targets.  */
 #define TARGET_LITTLE_SYM		bfd_elf32_littlemips_vec
 #define TARGET_LITTLE_NAME		"elf32-littlemips"
@@ -1790,6 +1801,7 @@ mips_vxworks_final_write_processing (bfd
 #undef elf_backend_additional_program_headers
 #undef elf_backend_modify_segment_map
 #undef elf_backend_symbol_processing
+#undef elf_backend_plt_sym_val
 /* NOTE: elf_backend_rela_normal is not defined for MIPS.  */
 
 #include "elf32-target.h"
--- a/bfd/elfxx-mips.c
+++ b/bfd/elfxx-mips.c
@@ -694,6 +694,11 @@ static bfd *reldyn_sorting_bfd;
 /* Nonzero if ABFD is using NewABI conventions.  */
 #define NEWABI_P(abfd) (ABI_N32_P (abfd) || ABI_64_P (abfd))
 
+/* Nonzero if ABFD is a non-PIC object.  */
+#define NON_PIC_P(abfd) \
+  (((elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) == 0) \
+   && ((elf_elfheader (abfd)->e_flags & EF_MIPS_CPIC) == EF_MIPS_CPIC))
+
 /* The IRIX compatibility level we are striving for.  */
 #define IRIX_COMPAT(abfd) \
   (get_elf_backend_data (abfd)->elf_backend_mips_irix_compat (abfd))
@@ -706,6 +711,9 @@ static bfd *reldyn_sorting_bfd;
 #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \
   (NEWABI_P (abfd) ? ".MIPS.options" : ".options")
 
+/* The name of the section holding non-PIC to PIC call stubs.  */
+#define NON_PIC_TO_PIC_STUB_SECTION_NAME ".MIPS.pic_stubs"
+
 /* True if NAME is the recognized name of any SHT_MIPS_OPTIONS section.
    Some IRIX system files do not use MIPS_ELF_OPTIONS_SECTION_NAME.  */
 #define MIPS_ELF_OPTIONS_SECTION_NAME_P(NAME) \
@@ -7619,7 +7627,9 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s
 
 	      /* We need a stub, not a plt entry for the undefined
 		 function.  But we record it as if it needs plt.  See
-		 _bfd_elf_adjust_dynamic_symbol.  */
+		 _bfd_elf_adjust_dynamic_symbol.  Note that these relocations
+		 are always used for PIC calls, even when using the new
+		 non-PIC ABI.  */
 	      h->needs_plt = 1;
 	      h->type = STT_FUNC;
 	    }
@@ -7725,6 +7735,8 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s
 	case R_MIPS_32:
 	case R_MIPS_REL32:
 	case R_MIPS_64:
+	  if (h != NULL)
+	    h->non_got_ref = TRUE;
 	  /* In VxWorks executables, references to external symbols
 	     are handled using copy relocs or PLT stubs, so there's
 	     no need to add a .rela.dyn entry for this relocation.  */
@@ -7780,11 +7792,21 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s
 	case R_MIPS_GPREL16:
 	case R_MIPS_LITERAL:
 	case R_MIPS_GPREL32:
+	  if (h != NULL
+	      && (r_type == R_MIPS_GPREL16 || r_type == R_MIPS_GPREL32))
+	    h->non_got_ref = TRUE;
+
 	  if (SGI_COMPAT (abfd))
 	    mips_elf_hash_table (info)->compact_rel_size +=
 	      sizeof (Elf32_External_crinfo);
 	  break;
 
+	case R_MIPS_HI16:
+	case R_MIPS_LO16:
+	  if (h != NULL && strcmp (h->root.root.string, "_gp_disp") != 0)
+	    h->non_got_ref = TRUE;
+	  break;
+
 	  /* This relocation describes the C++ object vtable hierarchy.
 	     Reconstruct it for later use during GC.  */
 	case R_MIPS_GNU_VTINHERIT:
@@ -7807,20 +7829,20 @@ _bfd_mips_elf_check_relocs (bfd *abfd, s
 
       /* We must not create a stub for a symbol that has relocations
 	 related to taking the function's address.  This doesn't apply to
-	 VxWorks, where CALL relocs refer to a .got.plt entry instead of
-	 a normal .got entry.  */
+	 VxWorks or the non-PIC ABI, where CALL relocs refer to a
+	 .got.plt entry instead of a normal .got entry.  */
       if (!htab->is_vxworks && h != NULL)
 	switch (r_type)
 	  {
-	  default:
-	    ((struct mips_elf_link_hash_entry *) h)->no_fn_stub = TRUE;
-	    break;
 	  case R_MIPS16_CALL16:
 	  case R_MIPS_CALL16:
 	  case R_MIPS_CALL_HI16:
 	  case R_MIPS_CALL_LO16:
 	  case R_MIPS_JALR:
 	    break;
+	  default:
+	    ((struct mips_elf_link_hash_entry *) h)->no_fn_stub = TRUE;
+	    break;
 	  }
 
       /* See if this reloc would need to refer to a MIPS16 hard-float stub,
@@ -12514,7 +12536,9 @@ _bfd_mips_elf_merge_private_bfd_data (bf
 	  break;
 	}
     }
-  if (null_input_bfd)
+  /* Dynamic objects normally have no sections, and do not reach
+     here - but they might if used as DYNOBJ.  */
+  if (null_input_bfd || (ibfd->flags & DYNAMIC) != 0)
     return TRUE;
 
   ok = TRUE;
--- a/bfd/elfxx-mips.h
+++ b/bfd/elfxx-mips.h
@@ -63,6 +63,9 @@ extern bfd_boolean _bfd_mips_elf_finish_
 extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol
   (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
    Elf_Internal_Sym *);
+extern bfd_boolean _bfd_mips_nonpic_finish_dynamic_symbol
+  (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
+   Elf_Internal_Sym *);
 extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections
   (bfd *, struct bfd_link_info *);
 extern void _bfd_mips_elf_final_write_processing
@@ -153,6 +156,15 @@ extern const struct bfd_elf_special_sect
 
 extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *);
 
+extern bfd_vma _bfd_mips_elf_plt_sym_val
+  (bfd_vma, const asection *, const arelent *);
+extern void _bfd_mips_elf_begin_write_processing
+  (bfd *abfd, struct bfd_link_info *link_info);
+extern bfd_boolean bfd_mips_elf_maybe_create_non_pic_to_pic_stubs_section
+  (struct bfd_link_info *);
+extern void _bfd_mips_post_process_headers
+  (bfd *abfd, struct bfd_link_info *link_info);
+
 #define elf_backend_common_definition   _bfd_mips_elf_common_definition
 #define elf_backend_name_local_section_symbols \
   _bfd_mips_elf_name_local_section_symbols
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -1891,6 +1891,12 @@ md_begin (void)
 	as_bad (_("-G may not be used in position-independent code"));
       g_switch_value = 0;
     }
+  else if (mips_abicalls)
+    {
+      if (g_switch_seen && g_switch_value != 0)
+	as_bad (_("-G may not be used with abicalls"));
+      g_switch_value = 0;
+    }
 
   if (! bfd_set_arch_mach (stdoutput, bfd_arch_mips, file_mips_arch))
     as_warn (_("Could not set architecture and machine"));
@@ -11258,6 +11264,7 @@ enum options
     OPTION_PDR,
     OPTION_NO_PDR,
     OPTION_MVXWORKS_PIC,
+    OPTION_NON_PIC_ABICALLS,
 #endif /* OBJ_ELF */
     OPTION_END_OF_ENUM    
   };
@@ -11359,6 +11366,7 @@ struct option md_longopts[] =
   {"mpdr", no_argument, NULL, OPTION_PDR},
   {"mno-pdr", no_argument, NULL, OPTION_NO_PDR},
   {"mvxworks-pic", no_argument, NULL, OPTION_MVXWORKS_PIC},
+  {"mnon-pic-abicalls", no_argument, NULL, OPTION_NON_PIC_ABICALLS},
 #endif /* OBJ_ELF */
 
   {NULL, no_argument, NULL, 0}
@@ -11783,6 +11791,11 @@ md_parse_option (int c, char *arg)
     case OPTION_MVXWORKS_PIC:
       mips_pic = VXWORKS_PIC;
       break;
+
+    case OPTION_NON_PIC_ABICALLS:
+      mips_pic = NO_PIC;
+      mips_abicalls = TRUE;
+      break;
 #endif /* OBJ_ELF */
 
     default: