R_PPC64_ENTRY

Add a new relocation that marks large-model entry code, for edit back
to medium-model.

include/elf/
	* ppc64.h (R_PPC64_ENTRY): Define.
bfd/
	* reloc.c (BFD_RELOC_PPC64_ENTRY): New.
	* elf64-ppc.c (reloc_howto_type ppc64_elf_howto_raw): Add
	entry for R_PPC64_ENTRY.
	(LD_R2_0R12, ADD_R2_R2_R12, LIS_R2, ADDIS_R2_R12): Define.
	(ppc64_elf_reloc_type_lookup): Handle R_PPC64_ENTRY.
	(ppc64_elf_relocate_section): Edit code at R_PPC64_ENTTY.  Use
	new insn defines.
	* libbfd.h: Regenerate.
	* bfd-in2.h: Regenerate.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 8c0336d..0a92044 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,15 @@
+2015-12-07  Alan Modra  <amodra@gmail.com>
+
+       * reloc.c (BFD_RELOC_PPC64_ENTRY): New.
+       * elf64-ppc.c (reloc_howto_type ppc64_elf_howto_raw): Add
+       entry for R_PPC64_ENTRY.
+       (LD_R2_0R12, ADD_R2_R2_R12, LIS_R2, ADDIS_R2_R12): Define.
+       (ppc64_elf_reloc_type_lookup): Handle R_PPC64_ENTRY.
+       (ppc64_elf_relocate_section): Edit code at R_PPC64_ENTTY.  Use
+       new insn defines.
+       * libbfd.h: Regenerate.
+       * bfd-in2.h: Regenerate.
+
 2015-12-07  Kaz Kojima  <kkojima@rr.iij4u.or.jp>
 
        * config.bfd: Mark sh5*-*-* and sh64*-*-* as obsolete.

diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index db54efe..606d11b 100644 (file)
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -3330,6 +3330,7 @@ instruction.  */
   BFD_RELOC_PPC64_ADDR16_HIGH,
   BFD_RELOC_PPC64_ADDR16_HIGHA,
   BFD_RELOC_PPC64_ADDR64_LOCAL,
+  BFD_RELOC_PPC64_ENTRY,
 
 /* PowerPC and PowerPC64 thread-local storage relocations.  */
   BFD_RELOC_PPC_TLS,

diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index 9b5ebcd..17b7a13 100644 (file)
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -173,8 +173,12 @@ static bfd_vma opd_entry_value
 #define LD_R2_0R2      0xe8420000      /* ld    %r2,xxx+0(%r2)  */
 
 #define LD_R2_0R1      0xe8410000      /* ld    %r2,0(%r1)      */
+#define LD_R2_0R12     0xe84c0000      /* ld    %r2,0(%r12)     */
+#define ADD_R2_R2_R12  0x7c426214      /* add   %r2,%r2,%r12    */
 
-#define ADDIS_R12_R2   0x3d820000      /* addis %r12,%r2,xxx@ha     */
+#define LIS_R2         0x3c400000      /* lis %r2,xxx@ha         */
+#define ADDIS_R2_R12   0x3c4c0000      /* addis %r2,%r12,xxx@ha  */
+#define ADDIS_R12_R2   0x3d820000      /* addis %r12,%r2,xxx@ha  */
 #define ADDIS_R12_R12  0x3d8c0000      /* addis %r12,%r12,xxx@ha */
 #define LD_R12_0R12    0xe98c0000      /* ld    %r12,xxx@l(%r12) */
 
@@ -2127,6 +2131,21 @@ static reloc_howto_type ppc64_elf_howto_raw[] = {
         0xffff,                /* dst_mask */
         FALSE),                /* pcrel_offset */
 
+  /* Marker reloc on ELFv2 large-model function entry.  */
+  HOWTO (R_PPC64_ENTRY,
+        0,                     /* rightshift */
+        2,                     /* size (0 = byte, 1 = short, 2 = long) */
+        32,                    /* bitsize */
+        FALSE,                 /* pc_relative */
+        0,                     /* bitpos */
+        complain_overflow_dont, /* complain_on_overflow */
+        bfd_elf_generic_reloc, /* special_function */
+        "R_PPC64_ENTRY",       /* name */
+        FALSE,                 /* partial_inplace */
+        0,                     /* src_mask */
+        0,                     /* dst_mask */
+        FALSE),                /* pcrel_offset */
+
   /* Like ADDR64, but use local entry point of function.  */
   HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
         0,                     /* rightshift */
@@ -2429,6 +2448,8 @@ ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
       break;
     case BFD_RELOC_PPC_REL16DX_HA:             r = R_PPC64_REL16DX_HA;
       break;
+    case BFD_RELOC_PPC64_ENTRY:                        r = R_PPC64_ENTRY;
+      break;
     case BFD_RELOC_PPC64_ADDR64_LOCAL:         r = R_PPC64_ADDR64_LOCAL;
       break;
     case BFD_RELOC_VTABLE_INHERIT:             r = R_PPC64_GNU_VTINHERIT;
@@ -5575,6 +5596,10 @@ ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
          sec->has_toc_reloc = 1;
          break;
 
+         /* Marker reloc.  */
+       case R_PPC64_ENTRY:
+         break;
+
          /* This relocation describes the C++ object vtable hierarchy.
             Reconstruct it for later use during GC.  */
        case R_PPC64_GNU_VTINHERIT:
@@ -13852,6 +13877,52 @@ ppc64_elf_relocate_section (bfd *output_bfd,
            }
          break;
 
+       case R_PPC64_ENTRY:
+         relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
+         if (!bfd_link_pic (info)
+             && !info->traditional_format
+             && relocation + 0x80008000 <= 0xffffffff)
+           {
+             unsigned int insn1, insn2;
+
+             insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
+             insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
+             if ((insn1 & ~0xfffc) == LD_R2_0R12
+                 && insn2 == ADD_R2_R2_R12)
+               {
+                 bfd_put_32 (output_bfd,
+                             LIS_R2 + PPC_HA (relocation),
+                             contents + rel->r_offset);
+                 bfd_put_32 (output_bfd,
+                             ADDI_R2_R2 + PPC_LO (relocation),
+                             contents + rel->r_offset + 4);
+               }
+           }
+         else
+           {
+             relocation -= (rel->r_offset
+                            + input_section->output_offset
+                            + input_section->output_section->vma);
+             if (relocation + 0x80008000 <= 0xffffffff)
+               {
+                 unsigned int insn1, insn2;
+
+                 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
+                 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
+                 if ((insn1 & ~0xfffc) == LD_R2_0R12
+                     && insn2 == ADD_R2_R2_R12)
+                   {
+                     bfd_put_32 (output_bfd,
+                                 ADDIS_R2_R12 + PPC_HA (relocation),
+                                 contents + rel->r_offset);
+                     bfd_put_32 (output_bfd,
+                                 ADDI_R2_R2 + PPC_LO (relocation),
+                                 contents + rel->r_offset + 4);
+                   }
+               }
+           }
+         break;
+
        case R_PPC64_REL16_HA:
          /* If we are generating a non-PIC executable, edit
             .  0:      addis 2,12,.TOC.-0b@ha
@@ -13862,6 +13933,7 @@ ppc64_elf_relocate_section (bfd *output_bfd,
             if .TOC. is in range.  */
          if (!bfd_link_pic (info)
              && !info->traditional_format
+             && !htab->opd_abi
              && h != NULL && &h->elf == htab->elf.hgot
              && rel + 1 < relend
              && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
@@ -13873,15 +13945,15 @@ ppc64_elf_relocate_section (bfd *output_bfd,
              bfd_vma offset = rel->r_offset - d_offset;
              insn1 = bfd_get_32 (output_bfd, contents + offset);
              insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
-             if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
-                 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
+             if ((insn1 & 0xffff0000) == ADDIS_R2_R12
+                 && (insn2 & 0xffff0000) == ADDI_R2_R2)
                {
                  r_type = R_PPC64_ADDR16_HA;
                  rel->r_info = ELF64_R_INFO (r_symndx, r_type);
                  rel->r_addend -= d_offset;
                  rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
                  rel[1].r_addend -= d_offset + 4;
-                 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
+                 bfd_put_32 (output_bfd, LIS_R2, contents + offset);
                }
            }
          break;
@@ -14178,6 +14250,7 @@ ppc64_elf_relocate_section (bfd *output_bfd,
        case R_PPC64_TOCSAVE:
        case R_PPC64_GNU_VTINHERIT:
        case R_PPC64_GNU_VTENTRY:
+       case R_PPC64_ENTRY:
          goto copy_reloc;
 
          /* GOT16 relocations.  Like an ADDR16 using the symbol's

diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index a6ed64e..1c93c91 100644 (file)
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -1418,6 +1418,7 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
   "BFD_RELOC_PPC64_ADDR16_HIGH",
   "BFD_RELOC_PPC64_ADDR16_HIGHA",
   "BFD_RELOC_PPC64_ADDR64_LOCAL",
+  "BFD_RELOC_PPC64_ENTRY",
   "BFD_RELOC_PPC_TLS",
   "BFD_RELOC_PPC_TLSGD",
   "BFD_RELOC_PPC_TLSLD",

diff --git a/bfd/reloc.c b/bfd/reloc.c
index 17c470e..593e7c7 100644 (file)
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -2943,6 +2943,8 @@ ENUMX
   BFD_RELOC_PPC64_ADDR16_HIGHA
 ENUMX
   BFD_RELOC_PPC64_ADDR64_LOCAL
+ENUMX
+  BFD_RELOC_PPC64_ENTRY
 ENUMDOC
   Power(rs6000) and PowerPC relocations.
 

diff --git a/include/elf/ChangeLog b/include/elf/ChangeLog
index 22a25cb..e6e7af9 100644 (file)
--- a/include/elf/ChangeLog
+++ b/include/elf/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-07  Alan Modra  <amodra@gmail.com>
+
+       * ppc64.h (R_PPC64_ENTRY): Define.
+
 2015-11-11  Alan Modra  <amodra@gmail.com>
            Peter Bergner <bergner@vnet.ibm.com>
 

diff --git a/include/elf/ppc64.h b/include/elf/ppc64.h
index 2cc24cc..9b47b52 100644 (file)
--- a/include/elf/ppc64.h
+++ b/include/elf/ppc64.h
@@ -152,6 +152,7 @@ START_RELOC_NUMBERS (elf_ppc64_reloc_type)
 /* Added for ELFv2.  */
   RELOC_NUMBER (R_PPC64_REL24_NOTOC,      116)
   RELOC_NUMBER (R_PPC64_ADDR64_LOCAL,     117)
+  RELOC_NUMBER (R_PPC64_ENTRY,            118)
 
 #ifndef RELOC_MACROS_GEN_FUNC
 /* Fake relocation only used internally by ld.  */