Support ELFv2 stack frame.

The toc pointer save slot changes on ELFv2 from 40(1) to 24(1).

	* elf64-ppc.c (STK_LR, STK_TOC, STK_LINKER): Define.
	(savegpr0_tail, restgpr0_tail, savefpr0_tail, restfpr0_tail)
	build_plt_stub, build_tls_get_addr_stub, ppc_build_one_stub,
	ppc64_elf_relocate_section): Use new defines.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index cdb7908..6afd755 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,12 @@
 2013-10-30  Alan Modra  <amodra@gmail.com>
 
+       * elf64-ppc.c (STK_LR, STK_TOC, STK_LINKER): Define.
+       (savegpr0_tail, restgpr0_tail, savefpr0_tail, restfpr0_tail)
+       build_plt_stub, build_tls_get_addr_stub, ppc_build_one_stub,
+       ppc64_elf_relocate_section): Use new defines.
+
+2013-10-30  Alan Modra  <amodra@gmail.com>
+
        * elf64-ppc.c (PLT_ENTRY_SIZE, PLT_INITIAL_ENTRY_SIZE): Add htab
        parameter and adjust for ELFv2.  Update all uses.
        (PLT_CALL_STUB_SIZE): Delete.

diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index 6fbcdf0..8f74333 100644 (file)
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -130,6 +130,14 @@ static bfd_vma opd_entry_value
 /* The initial size of the plt reserved for the dynamic linker.  */
 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
 
+/* Offsets to some stack save slots.  */
+#define STK_LR 16
+#define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
+/* This one is dodgy.  ABIv2 does not have a linker word, so use the
+   CR save slot.  Used only by optimised __tls_get_addr call stub,
+   relying on __tls_get_addr_opt not saving CR..  */
+#define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
+
 /* TOC base pointers offset from start of TOC.  */
 #define TOC_BASE_OFF   0x8000
 
@@ -140,7 +148,7 @@ static bfd_vma opd_entry_value
 /* .plt call stub instructions.  The normal stub is like this, but
    sometimes the .plt entry crosses a 64k boundary and we need to
    insert an addi to adjust r11.  */
-#define STD_R2_40R1    0xf8410028      /* std   %r2,40(%r1)         */
+#define STD_R2_0R1     0xf8410000      /* std   %r2,0+40(%r1)       */
 #define ADDIS_R11_R2   0x3d620000      /* addis %r11,%r2,xxx@ha     */
 #define LD_R12_0R11    0xe98b0000      /* ld    %r12,xxx+0@l(%r11)  */
 #define MTCTR_R12      0x7d8903a6      /* mtctr %r12                */
@@ -164,7 +172,7 @@ static bfd_vma opd_entry_value
 #define LD_R11_0R2     0xe9620000      /* ld    %r11,xxx+0(%r2) */
 #define LD_R2_0R2      0xe8420000      /* ld    %r2,xxx+0(%r2)  */
 
-#define LD_R2_40R1     0xe8410028      /* ld    %r2,40(%r1)     */
+#define LD_R2_0R1      0xe8410000      /* ld    %r2,0(%r1)      */
 
 /* glink call stub instructions.  We enter with the index in R0.  */
 #define GLINK_CALL_STUB_SIZE (16*4)
@@ -6505,7 +6513,7 @@ static bfd_byte *
 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
 {
   p = savegpr0 (abfd, p, r);
-  bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
+  bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
   p = p + 4;
   bfd_put_32 (abfd, BLR, p);
   return p + 4;
@@ -6521,7 +6529,7 @@ restgpr0 (bfd *abfd, bfd_byte *p, int r)
 static bfd_byte *
 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
 {
-  bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
+  bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
   p = p + 4;
   p = restgpr0 (abfd, p, r);
   bfd_put_32 (abfd, MTLR_R0, p);
@@ -6576,7 +6584,7 @@ static bfd_byte *
 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
 {
   p = savefpr (abfd, p, r);
-  bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
+  bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
   p = p + 4;
   bfd_put_32 (abfd, BLR, p);
   return p + 4;
@@ -6592,7 +6600,7 @@ restfpr (bfd *abfd, bfd_byte *p, int r)
 static bfd_byte *
 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
 {
-  bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
+  bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
   p = p + 4;
   p = restfpr (abfd, p, r);
   bfd_put_32 (abfd, MTLR_R0, p);
@@ -10083,7 +10091,7 @@ build_plt_stub (struct ppc_link_hash_table *htab,
        }
       if (ALWAYS_EMIT_R2SAVE
          || stub_entry->stub_type == ppc_stub_plt_call_r2save)
-       bfd_put_32 (obfd, STD_R2_40R1, p),                      p += 4;
+       bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p),      p += 4;
       bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p),    p += 4;
       bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p),     p += 4;
       if (plt_load_toc
@@ -10137,7 +10145,7 @@ build_plt_stub (struct ppc_link_hash_table *htab,
        }
       if (ALWAYS_EMIT_R2SAVE
          || stub_entry->stub_type == ppc_stub_plt_call_r2save)
-       bfd_put_32 (obfd, STD_R2_40R1, p),                      p += 4;
+       bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p),      p += 4;
       bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p),      p += 4;
       if (plt_load_toc
          && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
@@ -10178,11 +10186,9 @@ build_plt_stub (struct ppc_link_hash_table *htab,
 #define ADD_R3_R12_R13 0x7c6c6a14
 #define BEQLR          0x4d820020
 #define MR_R3_R0       0x7c030378
-#define MFLR_R11       0x7d6802a6
 #define STD_R11_0R1    0xf9610000
 #define BCTRL          0x4e800421
 #define LD_R11_0R1     0xe9610000
-#define LD_R2_0R1      0xe8410000
 #define MTLR_R11       0x7d6803a6
 
 static inline bfd_byte *
@@ -10200,15 +10206,15 @@ build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
   bfd_put_32 (obfd, BEQLR, p),                 p += 4;
   bfd_put_32 (obfd, MR_R3_R0, p),              p += 4;
   bfd_put_32 (obfd, MFLR_R11, p),              p += 4;
-  bfd_put_32 (obfd, STD_R11_0R1 + 32, p),      p += 4;
+  bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
 
   if (r != NULL)
     r[0].r_offset += 9 * 4;
   p = build_plt_stub (htab, stub_entry, p, offset, r);
   bfd_put_32 (obfd, BCTRL, p - 4);
 
-  bfd_put_32 (obfd, LD_R11_0R1 + 32, p),       p += 4;
-  bfd_put_32 (obfd, LD_R2_0R1 + 40, p),                p += 4;
+  bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p),        p += 4;
+  bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p),    p += 4;
   bfd_put_32 (obfd, MTLR_R11, p),              p += 4;
   bfd_put_32 (obfd, BLR, p),                   p += 4;
 
@@ -10332,7 +10338,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
              htab->stub_error = TRUE;
              return FALSE;
            }
-         bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
+         bfd_put_32 (htab->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
          loc += 4;
          size = 12;
          if (PPC_HA (r2off) != 0)
@@ -10528,7 +10534,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
              return FALSE;
            }
 
-         bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
+         bfd_put_32 (htab->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
          loc += 4;
          size = 20;
          if (PPC_HA (off) != 0)
@@ -13336,7 +13342,8 @@ ppc64_elf_relocate_section (bfd *output_bfd,
              insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
              if (insn == NOP
                  || insn == CROR_151515 || insn == CROR_313131)
-               bfd_put_32 (input_bfd, STD_R2_40R1,
+               bfd_put_32 (input_bfd,
+                           STD_R2_0R1 + STK_TOC (htab),
                            contents + rel->r_offset);
            }
          break;
@@ -13406,7 +13413,8 @@ ppc64_elf_relocate_section (bfd *output_bfd,
                              /* Special stub used, leave nop alone.  */
                            }
                          else
-                           bfd_put_32 (input_bfd, LD_R2_40R1,
+                           bfd_put_32 (input_bfd,
+                                       LD_R2_0R1 + STK_TOC (htab),
                                        contents + rel->r_offset + 4);
                          can_plt_call = TRUE;
                        }