* elf32-ppc.c (ppc_elf_howto_raw); Add entry for R_PPC_RELAX32PC.

	(ppc_elf_install_value): Handle R_PPC_RELAX32PC.  Merge duplicate
	cases.
	(shared_stub_entry): Correct opcode.
	(ppc_elf_relax_section): Generate R_PPC_RELAX32PC relocs.
	(ppc_elf_relocate_section): Handle them.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index d606e9b..5a343ea 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,12 @@
+2003-11-06  Alan Modra  <amodra@bigpond.net.au>
+
+       * elf32-ppc.c (ppc_elf_howto_raw); Add entry for R_PPC_RELAX32PC.
+       (ppc_elf_install_value): Handle R_PPC_RELAX32PC.  Merge duplicate
+       cases.
+       (shared_stub_entry): Correct opcode.
+       (ppc_elf_relax_section): Generate R_PPC_RELAX32PC relocs.
+       (ppc_elf_relocate_section): Handle them.
+
 2003-11-05  Alan Modra  <amodra@bigpond.net.au>
 
        * elf.c (_bfd_elf_rela_local_sym): Accept asection **, and return
@@ -49,7 +58,7 @@
        * elf32-ppc.c (ppc_elf_relocate_section): Don't recalculate everything
        for R_PPC_RELAX32 reloc.  Don't bother checking ppc_elf_install_value
        return value.
-       * elf64-ppc.c (ppc64_elf_relocate_section <R_PPC64_TOC>): Sanity check 
+       * elf64-ppc.c (ppc64_elf_relocate_section <R_PPC64_TOC>): Sanity check
        sec->id.
 
 2003-11-05  Alan Modra  <amodra@bigpond.net.au>

diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c
index 71a5d45..e095709 100644 (file)
--- a/bfd/elf32-ppc.c
+++ b/bfd/elf32-ppc.c
@@ -1531,7 +1531,7 @@ static reloc_howto_type ppc_elf_howto_raw[] = {
         0xffff,                /* dst_mask */
         FALSE),                /* pcrel_offset */
 
-  /* Phony reloc to handle branch stubs.  */
+  /* Phony relocs to handle branch stubs.  */
   HOWTO (R_PPC_RELAX32,         /* type */
         0,                     /* rightshift */
         0,                     /* size */
@@ -1546,6 +1546,20 @@ static reloc_howto_type ppc_elf_howto_raw[] = {
         0,                     /* dst_mask */
         FALSE),                /* pcrel_offset */
 
+  HOWTO (R_PPC_RELAX32PC,       /* type */
+        0,                     /* rightshift */
+        0,                     /* size */
+        0,                     /* bitsize */
+        FALSE,                 /* pc_relative */
+        0,                     /* bitpos */
+        complain_overflow_dont, /* complain_on_overflow */
+        bfd_elf_generic_reloc, /* special_function */
+        "R_PPC_RELAX32PC",     /* name */
+        FALSE,                 /* partial_inplace */
+        0,                     /* src_mask */
+        0,                     /* dst_mask */
+        FALSE),                /* pcrel_offset */
+
   /* GNU extension to record C++ vtable hierarchy.  */
   HOWTO (R_PPC_GNU_VTINHERIT,  /* type */
         0,                     /* rightshift */
@@ -1627,7 +1641,7 @@ ppc_elf_install_value (bfd *abfd,
   switch (r_type)
     {
     case R_PPC_RELAX32:
-      /* Do stuff here.  */
+    case R_PPC_RELAX32PC:
       t0 = bfd_get_32 (abfd, hit_addr);
       t1 = bfd_get_32 (abfd, hit_addr + 4);
 
@@ -1645,6 +1659,8 @@ ppc_elf_install_value (bfd *abfd,
       break;
 
     case R_PPC_REL24:
+    case R_PPC_LOCAL24PC:
+    case R_PPC_PLTREL24:
       t0 = bfd_get_32 (abfd, hit_addr);
       t0 &= ~0x3fffffc;
       t0 |= val & 0x3fffffc;
@@ -1660,14 +1676,6 @@ ppc_elf_install_value (bfd *abfd,
       bfd_put_32 (abfd, t0, hit_addr);
       break;
 
-    case R_PPC_LOCAL24PC:
-    case R_PPC_PLTREL24:
-      t0 = bfd_get_32 (abfd, hit_addr);
-      t0 &= ~0x3fffffc;
-      t0 |= val & 0x3fffffc;
-      bfd_put_32 (abfd, t0, hit_addr);
-      break;
-
     default:
       return bfd_reloc_notsupported;
     }
@@ -1681,7 +1689,7 @@ static const bfd_byte shared_stub_entry[] =
     0x7c, 0x08, 0x02, 0xa6, /* mflr 0 */
     0x42, 0x9f, 0x00, 0x05, /* bcl 20, 31, .Lxxx */
     0x7d, 0x68, 0x02, 0xa6, /* mflr 11 */
-    0x3d, 0x60, 0x00, 0x00, /* addis 11, 11, (xxx-.Lxxx)@ha */
+    0x3d, 0x6b, 0x00, 0x00, /* addis 11, 11, (xxx-.Lxxx)@ha */
     0x39, 0x6b, 0x00, 0x18, /* addi 11, 11, (xxx-.Lxxx)@l */
     0x7c, 0x08, 0x03, 0xa6, /* mtlr 0 */
     0x7d, 0x69, 0x03, 0xa6, /* mtctr 11 */
@@ -1908,26 +1916,39 @@ ppc_elf_relax_section (bfd *abfd,
       if (tsec == isec)
        continue;
 
-      /* Look for an existing fixup to this address.  */
+      /* Look for an existing fixup to this address.
+        ??? What if the existing fixup is for a non-pic stub, and the
+        new one requires a pic stub?  This presumably could happen with
+        a static link and a mix of R_PPC_LOCAL24PC and R_PPC_REL24
+        relocs to a symbol needing long branch stubs.
+        ??? Why do we require R_PPC_LOCAL24PC and branches to the plt
+        to have a shared branch stub?  Shared branch stubs should only
+        be needed when info->shared.  */
       for (f = fixups; f ; f = f->next)
        if (f->tsec == tsec && f->toff == toff)
          break;
 
       if (f == NULL)
        {
+         const bfd_byte *stub;
          size_t size;
+         unsigned long stub_rtype;
 
          if (link_info->shared
              || tsec == ppc_info->plt
              || r_type == R_PPC_LOCAL24PC)
            {
+             stub = shared_stub_entry;
              size = sizeof (shared_stub_entry);
              insn_offset = 16;
+             stub_rtype = R_PPC_RELAX32PC;
            }
          else
            {
+             stub = stub_entry;
              size = sizeof (stub_entry);
              insn_offset = 4;
+             stub_rtype = R_PPC_RELAX32;
            }
 
          /* Resize the current section to make room for the new branch.  */
@@ -1939,17 +1960,12 @@ ppc_elf_relax_section (bfd *abfd,
 
          isec->_cooked_size = amt;
 
-         if (link_info->shared
-             || tsec == ppc_info->plt
-             || r_type == R_PPC_LOCAL24PC)
-           memcpy (contents + trampoff, shared_stub_entry, size);
-         else
-           memcpy (contents + trampoff, stub_entry, size);
+         memcpy (contents + trampoff, stub, size);
 
          /* Hijack the old relocation.  Since we need two
             relocations for this use a "composite" reloc.  */
          irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
-                                      R_PPC_RELAX32);
+                                      stub_rtype);
          irel->r_offset = trampoff + insn_offset;
 
          /* Record the fixup so we don't do it again this section.  */
@@ -5440,6 +5456,11 @@ ppc_elf_relocate_section (bfd *output_bfd,
            }
          break;
 
+       case R_PPC_RELAX32PC:
+         relocation -= (input_section->output_section->vma
+                        + input_section->output_offset
+                        + rel->r_offset - 4);
+         /* Fall thru */
        case R_PPC_RELAX32:
          ppc_elf_install_value (output_bfd, contents + rel->r_offset,
                                 relocation + addend, r_type);