bfd/

	* elf.c (_bfd_elf_map_sections_to_segments): Don't put
	executable sections into the same segment with other
	read only sections if --sep-code.
	* elf32-bfin.c (elf32_bfin_code_in_l1): New variable.
	(elf32_bfin_data_in_l1): New variable.
	(elf32_bfin_final_write_processing): New.
	(elf32_bfin_special_sections[]): New.
	(elf_backend_final_write_processing): Define.
	(elf_backend_special_sections): Define.

	binutils/
	* readelf.c (get_machine_flags): Deal with Blackfin specific
	flags.

	include/
	* bfdlink.h (struct bfd_link_info): Add sep_code member
	variable.
	* elf/bfin.h (EF_BFIN_CODE_IN_L1): Define.
	(EF_BFIN_DATA_IN_L1): Define.

	ld/
	* Makefile.am (eelf32bfin.c): Depend on bfin.em.
	(eelf32bfinfd.c): Likewise.
	* Makefile.in: Regenerate.
	* gen-doc.texi: Set Blackfin.
	* ld.texinfo: Document --sep-code and Blackfin specific
	options.
	* ldmain.c (main): Initialize link_info.sep_code.
	* lexsup.c (enum option_values): Add OPTION_SEP_CODE.
	(ld_options[]): Add --sep-code.
	(parse_args): Deal with --sep-code.
	* emulparams/bfin.sh (EXTRA_EM_FILE): Define.
	* emulparams/elf32bfinfd.sh (OTHER_SECTIONS): Define.
	* emultempl/bfin.em: New file.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index f838cbf..c37f13e 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,15 @@
+2008-07-12  Jie Zhang  <jie.zhang@analog.com>
+
+       * elf.c (_bfd_elf_map_sections_to_segments): Don't put
+       executable sections into the same segment with other
+       read only sections if --sep-code.
+       * elf32-bfin.c (elf32_bfin_code_in_l1): New variable.
+       (elf32_bfin_data_in_l1): New variable.
+       (elf32_bfin_final_write_processing): New.
+       (elf32_bfin_special_sections[]): New.
+       (elf_backend_final_write_processing): Define.
+       (elf_backend_special_sections): Define.
+
 2008-07-11  Andreas Schwab  <schwab@suse.de>
 
        * dwarf2.c (read_section): Take pointer to bfd_size_type instead

diff --git a/bfd/elf.c b/bfd/elf.c
index d65c78d..f066c7c 100644 (file)
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -3605,6 +3605,7 @@ _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
       asection **hdrpp;
       bfd_boolean phdr_in_segment = TRUE;
       bfd_boolean writable;
+      bfd_boolean executable;
       int tls_count = 0;
       asection *first_tls = NULL;
       asection *dynsec, *eh_frame_hdr;
@@ -3676,6 +3677,7 @@ _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
       phdr_index = 0;
       maxpagesize = bed->maxpagesize;
       writable = FALSE;
+      executable = FALSE;
       dynsec = bfd_get_section_by_name (abfd, ".dynamic");
       if (dynsec != NULL
          && (dynsec->flags & SEC_LOAD) == 0)
@@ -3757,6 +3759,14 @@ _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
                 ends precisely on a page boundary.  */
              new_segment = TRUE;
            }
+         else if (info->sep_code
+                  && ((! executable && (hdr->flags & SEC_CODE) != 0)
+                      || (executable && (hdr->flags & SEC_CODE) == 0)))
+           {
+             /* We don't want to put a executable section in a non-executable
+                segment.  */
+             new_segment = TRUE;
+           }
          else
            {
              /* Otherwise, we can use the same segment.  */
@@ -3771,6 +3781,8 @@ _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
            {
              if ((hdr->flags & SEC_READONLY) == 0)
                writable = TRUE;
+             if ((hdr->flags & SEC_CODE) != 0)
+               executable = TRUE;
              last_hdr = hdr;
              /* .tbss sections effectively have zero size.  */
              if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
@@ -3796,6 +3808,11 @@ _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
          else
            writable = FALSE;
 
+         if ((hdr->flags & SEC_CODE) != 0)
+           executable = TRUE;
+         else
+           executable = FALSE;
+
          last_hdr = hdr;
          /* .tbss sections effectively have zero size.  */
          if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)

diff --git a/bfd/elf32-bfin.c b/bfd/elf32-bfin.c
index f83abd2..480feb2 100644 (file)
--- a/bfd/elf32-bfin.c
+++ b/bfd/elf32-bfin.c
@@ -1119,6 +1119,22 @@ bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
   return (reloc_howto_type *) NULL;
 }
 
+/* Set by ld emulation if --code-in-l1.  */
+bfd_boolean elf32_bfin_code_in_l1 = 0;
+
+/* Set by ld emulation if --data-in-l1.  */
+bfd_boolean elf32_bfin_data_in_l1 = 0;
+
+static void
+elf32_bfin_final_write_processing (bfd *abfd,
+                                  bfd_boolean linker ATTRIBUTE_UNUSED)
+{
+  if (elf32_bfin_code_in_l1)
+    elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1;
+  if (elf32_bfin_data_in_l1)
+    elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1;
+}
+
 /* Return TRUE if the name is a local label.
    bfin local labels begin with L$.  */
 static bfd_boolean
@@ -5572,6 +5588,14 @@ error_return:
     free (internal_relocs);
   return FALSE;
 }
+
+struct bfd_elf_special_section const elf32_bfin_special_sections[] =
+{
+  { ".l1.text",                8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
+  { ".l1.data",                8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+  { NULL,              0,  0, 0,            0 }
+};
+
 \f
 #define TARGET_LITTLE_SYM              bfd_elf32_bfin_vec
 #define TARGET_LITTLE_NAME             "elf32-bfin"
@@ -5618,8 +5642,11 @@ error_return:
                                         elf32_bfin_set_private_flags
 #define bfd_elf32_bfd_print_private_bfd_data \
                                         elf32_bfin_print_private_bfd_data
+#define elf_backend_final_write_processing \
+                                       elf32_bfin_final_write_processing
 #define elf_backend_reloc_type_class    elf32_bfin_reloc_type_class
 #define elf_backend_can_gc_sections 1
+#define elf_backend_special_sections   elf32_bfin_special_sections
 #define elf_backend_can_refcount 1
 #define elf_backend_want_got_plt 0
 #define elf_backend_plt_readonly 1

diff --git a/include/ChangeLog b/include/ChangeLog
index 6a433ea..1cc6fc5 100644 (file)
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,10 @@
+2008-07-12  Jie Zhang  <jie.zhang@analog.com>
+
+       * bfdlink.h (struct bfd_link_info): Add sep_code member
+       variable.
+       * elf/bfin.h (EF_BFIN_CODE_IN_L1): Define.
+       (EF_BFIN_DATA_IN_L1): Define.
+
 2008-07-07  Stan Shebs  <stan@codesourcery.com>
 
        * dis-asm.h (struct disassemble_info): Add endian_code field.

diff --git a/include/bfdlink.h b/include/bfdlink.h
index e683310..d22519a 100644 (file)
--- a/include/bfdlink.h
+++ b/include/bfdlink.h
@@ -346,6 +346,9 @@ struct bfd_link_info
   /* Non-NULL if .note.gnu.build-id section should be created.  */
   char *emit_note_gnu_build_id;
 
+  /* TRUE if putting code into separate segment.  */
+  unsigned int sep_code: 1;
+
   /* What to do with unresolved symbols in an object file.
      When producing executables the default is GENERATE_ERROR.
      When producing shared libraries the default is IGNORE.  The

diff --git a/include/elf/bfin.h b/include/elf/bfin.h
index 3c07cd1..523db9b 100644 (file)
--- a/include/elf/bfin.h
+++ b/include/elf/bfin.h
@@ -88,5 +88,8 @@ END_RELOC_NUMBERS (R_max)
 #define EF_BFIN_PIC            0x00000001      /* -fpic */
 #define EF_BFIN_FDPIC          0x00000002      /* -mfdpic */
 
+#define EF_BFIN_CODE_IN_L1     0x00000010      /* --code-in-l1 */
+#define EF_BFIN_DATA_IN_L1     0x00000020      /* --data-in-l1 */
+
 #define        EF_BFIN_PIC_FLAGS       (EF_BFIN_PIC | EF_BFIN_FDPIC)
 #endif /* _ELF_BFIN_H */