/* PowerPC-specific support for 32-bit ELF
Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
/* This file is based on a preliminary PowerPC ELF ABI. The
information may not match the final PowerPC ELF ABI. It includes
suggestions from the in-progress Embedded PowerPC ABI, and that
information may also not match. */
+#include <stdarg.h>
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "elf-bfd.h"
#include "elf/ppc.h"
#include "elf32-ppc.h"
+#include "elf-vxworks.h"
/* RELA relocations are used here. */
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
-/* The size in bytes of an entry in the procedure linkage table. */
-#define PLT_ENTRY_SIZE 12
-/* The initial size of the plt reserved for the dynamic linker. */
-#define PLT_INITIAL_ENTRY_SIZE 72
-/* The size of the gap between entries in the PLT. */
-#define PLT_SLOT_SIZE 8
+/* For old-style PLT. */
/* The number of single-slot PLT entries (the rest use two slots). */
#define PLT_NUM_SINGLE_ENTRIES 8192
-/* Some nop instructions. */
-#define NOP 0x60000000
-#define CROR_151515 0x4def7b82
-#define CROR_313131 0x4ffffb82
-
-/* Offset of tp and dtp pointers from start of TLS block. */
-#define TP_OFFSET 0x7000
-#define DTP_OFFSET 0x8000
-
-\f
-/* Enumeration to specify the special section. */
-enum elf_linker_section_enum
-{
- LINKER_SECTION_SDATA,
- LINKER_SECTION_SDATA2
-};
-
-/* Sections created by the linker. */
-
-typedef struct elf_linker_section
-{
- /* pointer to the section */
- asection *section;
- /* pointer to the relocations needed for this section */
- asection *rel_section;
- /* pointer to the created symbol hash value */
- struct elf_link_hash_entry *sym_hash;
- /* offset of symbol from beginning of section */
- bfd_vma sym_offset;
-} elf_linker_section_t;
-
-/* Linked list of allocated pointer entries. This hangs off of the
- symbol lists, and provides allows us to return different pointers,
- based on different addend's. */
-
-typedef struct elf_linker_section_pointers
-{
- /* next allocated pointer for this symbol */
- struct elf_linker_section_pointers *next;
- /* offset of pointer from beginning of section */
- bfd_vma offset;
- /* addend used */
- bfd_vma addend;
- /* which linker section this is */
- elf_linker_section_t *lsect;
- /* whether address was written yet */
- bfd_boolean written_address_p;
-} elf_linker_section_pointers_t;
-
-struct ppc_elf_obj_tdata
-{
- struct elf_obj_tdata elf;
-
- /* A mapping from local symbols to offsets into the various linker
- sections added. This is index by the symbol index. */
- elf_linker_section_pointers_t **linker_section_pointers;
-};
-
-#define ppc_elf_tdata(bfd) \
- ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
-
-#define elf_local_ptr_offsets(bfd) \
- (ppc_elf_tdata (bfd)->linker_section_pointers)
-
-/* Override the generic function because we store some extras. */
-
-static bfd_boolean
-ppc_elf_mkobject (bfd *abfd)
-{
- bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
- abfd->tdata.any = bfd_zalloc (abfd, amt);
- if (abfd->tdata.any == NULL)
- return FALSE;
- return TRUE;
-}
-
-/* The PPC linker needs to keep track of the number of relocs that it
- decides to copy as dynamic relocs in check_relocs for each symbol.
- This is so that it can later discard them if they are found to be
- unnecessary. We store the information in a field extending the
- regular ELF linker hash table. */
-
-struct ppc_elf_dyn_relocs
-{
- struct ppc_elf_dyn_relocs *next;
-
- /* The input section of the reloc. */
- asection *sec;
-
- /* Total number of relocs copied for the input section. */
- bfd_size_type count;
-
- /* Number of pc-relative relocs copied for the input section. */
- bfd_size_type pc_count;
-};
-
-/* PPC ELF linker hash entry. */
-
-struct ppc_elf_link_hash_entry
-{
- struct elf_link_hash_entry elf;
-
- /* If this symbol is used in the linker created sections, the processor
- specific backend uses this field to map the field into the offset
- from the beginning of the section. */
- elf_linker_section_pointers_t *linker_section_pointer;
-
- /* Track dynamic relocs copied for this symbol. */
- struct ppc_elf_dyn_relocs *dyn_relocs;
-
- /* Contexts in which symbol is used in the GOT (or TOC).
- TLS_GD .. TLS_TLS bits are or'd into the mask as the
- corresponding relocs are encountered during check_relocs.
- tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
- indicate the corresponding GOT entry type is not needed. */
-#define TLS_GD 1 /* GD reloc. */
-#define TLS_LD 2 /* LD reloc. */
-#define TLS_TPREL 4 /* TPREL reloc, => IE. */
-#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
-#define TLS_TLS 16 /* Any TLS reloc. */
-#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
- char tls_mask;
-};
-
-#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
-
-/* PPC ELF linker hash table. */
-
-struct ppc_elf_link_hash_table
-{
- struct elf_link_hash_table elf;
-
- /* Short-cuts to get to dynamic linker sections. */
- asection *got;
- asection *relgot;
- asection *plt;
- asection *relplt;
- asection *dynbss;
- asection *relbss;
- asection *dynsbss;
- asection *relsbss;
- elf_linker_section_t *sdata;
- elf_linker_section_t *sdata2;
- asection *sbss;
-
- /* Shortcut to .__tls_get_addr. */
- struct elf_link_hash_entry *tls_get_addr;
-
- /* TLS local dynamic got entry handling. */
- union {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } tlsld_got;
-
- /* Small local sym to section mapping cache. */
- struct sym_sec_cache sym_sec;
-};
-
-/* Get the PPC ELF linker hash table from a link_info structure. */
-
-#define ppc_elf_hash_table(p) \
- ((struct ppc_elf_link_hash_table *) (p)->hash)
-
-/* Create an entry in a PPC ELF linker hash table. */
-
-static struct bfd_hash_entry *
-ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
-{
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
- {
- entry = bfd_hash_allocate (table,
- sizeof (struct ppc_elf_link_hash_entry));
- if (entry == NULL)
- return entry;
- }
-
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- if (entry != NULL)
- {
- ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
- ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
- ppc_elf_hash_entry (entry)->tls_mask = 0;
- }
-
- return entry;
-}
-
-/* Create a PPC ELF linker hash table. */
-
-static struct bfd_link_hash_table *
-ppc_elf_link_hash_table_create (bfd *abfd)
-{
- struct ppc_elf_link_hash_table *ret;
-
- ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
- if (ret == NULL)
- return NULL;
-
- if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
- ppc_elf_link_hash_newfunc))
- {
- free (ret);
- return NULL;
- }
-
- return &ret->elf.root;
-}
-
-/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
- copying dynamic variables from a shared lib into an app's dynbss
- section, and instead use a dynamic relocation to point into the
- shared lib. */
-#define ELIMINATE_COPY_RELOCS 1
-
-/* Copy the extra info we tack onto an elf_link_hash_entry. */
-
-static void
-ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *ind)
-{
- struct ppc_elf_link_hash_entry *edir, *eind;
-
- edir = (struct ppc_elf_link_hash_entry *) dir;
- eind = (struct ppc_elf_link_hash_entry *) ind;
-
- if (eind->dyn_relocs != NULL)
- {
- if (edir->dyn_relocs != NULL)
- {
- struct ppc_elf_dyn_relocs **pp;
- struct ppc_elf_dyn_relocs *p;
-
- if (ind->root.type == bfd_link_hash_indirect)
- abort ();
+/* For new-style .glink and .plt. */
+#define GLINK_PLTRESOLVE 16*4
+#define GLINK_ENTRY_SIZE 4*4
- /* Add reloc counts against the weak sym to the strong sym
- list. Merge any entries against the same section. */
- for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
- {
- struct ppc_elf_dyn_relocs *q;
+/* VxWorks uses its own plt layout, filled in by the static linker. */
- for (q = edir->dyn_relocs; q != NULL; q = q->next)
- if (q->sec == p->sec)
- {
- q->pc_count += p->pc_count;
- q->count += p->count;
- *pp = p->next;
- break;
- }
- if (q == NULL)
- pp = &p->next;
- }
- *pp = edir->dyn_relocs;
- }
+/* The standard VxWorks PLT entry. */
+#define VXWORKS_PLT_ENTRY_SIZE 32
+static const bfd_vma ppc_elf_vxworks_plt_entry
+ [VXWORKS_PLT_ENTRY_SIZE / 4] =
+ {
+ 0x3d800000, /* lis r12,0 */
+ 0x818c0000, /* lwz r12,0(r12) */
+ 0x7d8903a6, /* mtctr r12 */
+ 0x4e800420, /* bctr */
+ 0x39600000, /* li r11,0 */
+ 0x48000000, /* b 14 <.PLT0resolve+0x4> */
+ 0x60000000, /* nop */
+ 0x60000000, /* nop */
+ };
+static const bfd_vma ppc_elf_vxworks_pic_plt_entry
+ [VXWORKS_PLT_ENTRY_SIZE / 4] =
+ {
+ 0x3d9e0000, /* addis r12,r30,0 */
+ 0x818c0000, /* lwz r12,0(r12) */
+ 0x7d8903a6, /* mtctr r12 */
+ 0x4e800420, /* bctr */
+ 0x39600000, /* li r11,0 */
+ 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
+ 0x60000000, /* nop */
+ 0x60000000, /* nop */
+ };
- edir->dyn_relocs = eind->dyn_relocs;
- eind->dyn_relocs = NULL;
- }
+/* The initial VxWorks PLT entry. */
+#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
+static const bfd_vma ppc_elf_vxworks_plt0_entry
+ [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
+ {
+ 0x3d800000, /* lis r12,0 */
+ 0x398c0000, /* addi r12,r12,0 */
+ 0x800c0008, /* lwz r0,8(r12) */
+ 0x7c0903a6, /* mtctr r0 */
+ 0x818c0004, /* lwz r12,4(r12) */
+ 0x4e800420, /* bctr */
+ 0x60000000, /* nop */
+ 0x60000000, /* nop */
+ };
+static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
+ [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
+ {
+ 0x819e0008, /* lwz r12,8(r30) */
+ 0x7d8903a6, /* mtctr r12 */
+ 0x819e0004, /* lwz r12,4(r30) */
+ 0x4e800420, /* bctr */
+ 0x60000000, /* nop */
+ 0x60000000, /* nop */
+ 0x60000000, /* nop */
+ 0x60000000, /* nop */
+ };
- edir->tls_mask |= eind->tls_mask;
+/* For executables, we have some additional relocations in
+ .rela.plt.unloaded, for the kernel loader. */
+
+/* The number of non-JMP_SLOT relocations per PLT0 slot. */
+#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
+/* The number of relocations in the PLTResolve slot. */
+#define VXWORKS_PLTRESOLVE_RELOCS 2
+/* The number of relocations in the PLTResolve slot when when creating
+ a shared library. */
+#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
+
+/* Some instructions. */
+#define ADDIS_11_11 0x3d6b0000
+#define ADDIS_11_30 0x3d7e0000
+#define ADDIS_12_12 0x3d8c0000
+#define ADDI_11_11 0x396b0000
+#define ADD_0_11_11 0x7c0b5a14
+#define ADD_11_0_11 0x7d605a14
+#define B 0x48000000
+#define BCL_20_31 0x429f0005
+#define BCTR 0x4e800420
+#define LIS_11 0x3d600000
+#define LIS_12 0x3d800000
+#define LWZU_0_12 0x840c0000
+#define LWZ_0_12 0x800c0000
+#define LWZ_11_11 0x816b0000
+#define LWZ_11_30 0x817e0000
+#define LWZ_12_12 0x818c0000
+#define MFLR_0 0x7c0802a6
+#define MFLR_12 0x7d8802a6
+#define MTCTR_0 0x7c0903a6
+#define MTCTR_11 0x7d6903a6
+#define MTLR_0 0x7c0803a6
+#define NOP 0x60000000
+#define SUB_11_11_12 0x7d6c5850
- if (ELIMINATE_COPY_RELOCS
- && ind->root.type != bfd_link_hash_indirect
- && dir->dynamic_adjusted)
- {
- /* If called to transfer flags for a weakdef during processing
- of elf_adjust_dynamic_symbol, don't copy non_got_ref.
- We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- dir->ref_dynamic |= ind->ref_dynamic;
- dir->ref_regular |= ind->ref_regular;
- dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
- dir->needs_plt |= ind->needs_plt;
- }
- else
- _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
-}
+/* Offset of tp and dtp pointers from start of TLS block. */
+#define TP_OFFSET 0x7000
+#define DTP_OFFSET 0x8000
\f
static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
- /* Phony relocs to handle branch stubs. */
- HOWTO (R_PPC_RELAX32, /* type */
+ /* A 16 bit relative relocation. */
+ HOWTO (R_PPC_REL16, /* type */
0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- FALSE, /* pc_relative */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
+ complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
- "R_PPC_RELAX32", /* name */
+ "R_PPC_REL16", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
- FALSE), /* pcrel_offset */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
- HOWTO (R_PPC_RELAX32PC, /* type */
+ /* A 16 bit relative relocation without overflow. */
+ HOWTO (R_PPC_REL16_LO, /* type */
0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- FALSE, /* pc_relative */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC_REL16_LO", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* The high order 16 bits of a relative address. */
+ HOWTO (R_PPC_REL16_HI, /* type */
+ 16, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
- "R_PPC_RELAX32PC", /* name */
+ "R_PPC_REL16_HI", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
- FALSE), /* pcrel_offset */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* The high order 16 bits of a relative address, plus 1 if the contents of
+ the low 16 bits, treated as a signed number, is negative. */
+ HOWTO (R_PPC_REL16_HA, /* type */
+ 16, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ ppc_elf_addr16_ha_reloc, /* special_function */
+ "R_PPC_REL16_HA", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_PPC_GNU_VTINHERIT, /* type */
ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
}
}
-\f
-#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
-
-static const int shared_stub_entry[] =
- {
- 0x7c0802a6, /* mflr 0 */
- 0x429f0005, /* bcl 20, 31, .Lxxx */
- 0x7d6802a6, /* mflr 11 */
- 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
- 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
- 0x7c0803a6, /* mtlr 0 */
- 0x7d6903a6, /* mtctr 11 */
- 0x4e800420, /* bctr */
- };
-static const int stub_entry[] =
- {
- 0x3d600000, /* lis 11,xxx@ha */
- 0x396b0000, /* addi 11,11,xxx@l */
- 0x7d6903a6, /* mtctr 11 */
- 0x4e800420, /* bctr */
- };
+static reloc_howto_type *
+ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ enum elf_ppc_reloc_type r;
+ /* Initialize howto table if not already done. */
+ if (!ppc_elf_howto_table[R_PPC_ADDR32])
+ ppc_elf_howto_init ();
-static bfd_boolean
-ppc_elf_relax_section (bfd *abfd,
- asection *isec,
- struct bfd_link_info *link_info,
- bfd_boolean *again)
-{
- struct one_fixup
- {
- struct one_fixup *next;
- asection *tsec;
- bfd_vma toff;
- bfd_vma trampoff;
- };
+ switch (code)
+ {
+ default:
+ return NULL;
- Elf_Internal_Shdr *symtab_hdr;
- bfd_byte *contents = NULL;
- Elf_Internal_Sym *isymbuf = NULL;
- Elf_Internal_Rela *internal_relocs = NULL;
- Elf_Internal_Rela *irel, *irelend;
- struct one_fixup *fixups = NULL;
- bfd_boolean changed;
- struct ppc_elf_link_hash_table *ppc_info;
- bfd_size_type trampoff;
+ case BFD_RELOC_NONE: r = R_PPC_NONE; break;
+ case BFD_RELOC_32: r = R_PPC_ADDR32; break;
+ case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
+ case BFD_RELOC_16: r = R_PPC_ADDR16; break;
+ case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
+ case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
+ case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
+ case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
+ case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
+ case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
+ case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
+ case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
+ case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
+ case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
+ case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
+ case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
+ case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
+ case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
+ case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
+ case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
+ case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
+ case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
+ case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
+ case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
+ case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
+ case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
+ case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
+ case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
+ case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
+ case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
+ case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
+ case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
+ case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
+ case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
+ case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
+ case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
+ case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
+ case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
+ case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
+ case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
+ case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
+ case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
+ case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
+ case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
+ case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
+ case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
+ case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
+ case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
+ case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
+ case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
+ case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
+ case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
+ case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
+ case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
+ case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
+ case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
+ case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
+ case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
+ case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
+ case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
+ case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
+ case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
+ case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
+ case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
+ case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
+ case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
+ case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
+ case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
+ case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
+ case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
+ }
- *again = FALSE;
+ return ppc_elf_howto_table[r];
+};
- /* Nothing to do if there are no relocations. */
- if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
- return TRUE;
+/* Set the howto pointer for a PowerPC ELF reloc. */
- trampoff = (isec->size + 3) & (bfd_vma) -4;
- /* Space for a branch around any trampolines. */
- trampoff += 4;
+static void
+ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
+{
+ /* Initialize howto table if not already done. */
+ if (!ppc_elf_howto_table[R_PPC_ADDR32])
+ ppc_elf_howto_init ();
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
+ cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+}
- /* Get a copy of the native relocations. */
- internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
- link_info->keep_memory);
- if (internal_relocs == NULL)
- goto error_return;
+/* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
- ppc_info = ppc_elf_hash_table (link_info);
- irelend = internal_relocs + isec->reloc_count;
+static bfd_reloc_status_type
+ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *reloc_entry,
+ asymbol *symbol,
+ void *data ATTRIBUTE_UNUSED,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message ATTRIBUTE_UNUSED)
+{
+ bfd_vma relocation;
- for (irel = internal_relocs; irel < irelend; irel++)
+ if (output_bfd != NULL)
{
- unsigned long r_type = ELF32_R_TYPE (irel->r_info);
- bfd_vma symaddr, reladdr, toff, roff;
- asection *tsec;
- struct one_fixup *f;
- size_t insn_offset = 0;
- bfd_vma max_branch_offset, val;
- bfd_byte *hit_addr;
- unsigned long t0;
- unsigned char sym_type;
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
- switch (r_type)
- {
- case R_PPC_REL24:
- case R_PPC_LOCAL24PC:
- case R_PPC_PLTREL24:
- max_branch_offset = 1 << 25;
- break;
+ if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
+ return bfd_reloc_outofrange;
- case R_PPC_REL14:
- case R_PPC_REL14_BRTAKEN:
- case R_PPC_REL14_BRNTAKEN:
- max_branch_offset = 1 << 15;
- break;
+ if (bfd_is_com_section (symbol->section))
+ relocation = 0;
+ else
+ relocation = symbol->value;
- default:
- continue;
- }
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+ if (reloc_entry->howto->pc_relative)
+ relocation -= reloc_entry->address;
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- Elf_Internal_Sym *isym;
-
- /* Read this BFD's local symbols. */
- if (isymbuf == NULL)
- {
- isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isymbuf == NULL)
- isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (isymbuf == 0)
- goto error_return;
- }
- isym = isymbuf + ELF32_R_SYM (irel->r_info);
- if (isym->st_shndx == SHN_UNDEF)
- continue; /* We can't do anything with undefined symbols. */
- else if (isym->st_shndx == SHN_ABS)
- tsec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- tsec = bfd_com_section_ptr;
- else
- tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ reloc_entry->addend += (relocation & 0x8000) << 1;
- toff = isym->st_value;
- sym_type = ELF_ST_TYPE (isym->st_info);
- }
- else
- {
- /* Global symbol handling. */
- unsigned long indx;
- struct elf_link_hash_entry *h;
+ return bfd_reloc_continue;
+}
- indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
- h = elf_sym_hashes (abfd)[indx];
+static bfd_reloc_status_type
+ppc_elf_unhandled_reloc (bfd *abfd,
+ arelent *reloc_entry,
+ asymbol *symbol,
+ void *data,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message)
+{
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ if (error_message != NULL)
+ {
+ static char buf[60];
+ sprintf (buf, _("generic linker can't handle %s"),
+ reloc_entry->howto->name);
+ *error_message = buf;
+ }
+ return bfd_reloc_dangerous;
+}
+\f
+/* Sections created by the linker. */
- if (r_type == R_PPC_PLTREL24
- && ppc_info->plt != NULL
- && h->plt.offset != (bfd_vma) -1)
- {
- tsec = ppc_info->plt;
- toff = h->plt.offset;
- }
- else if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- {
- tsec = h->root.u.def.section;
- toff = h->root.u.def.value;
- }
- else
- continue;
+typedef struct elf_linker_section
+{
+ /* Pointer to the bfd section. */
+ asection *section;
+ /* Section name. */
+ const char *name;
+ /* Associated bss section name. */
+ const char *bss_name;
+ /* Associated symbol name. */
+ const char *sym_name;
+ /* Associated symbol. */
+ struct elf_link_hash_entry *sym;
+} elf_linker_section_t;
- sym_type = h->type;
- }
+/* Linked list of allocated pointer entries. This hangs off of the
+ symbol lists, and provides allows us to return different pointers,
+ based on different addend's. */
- /* If the branch and target are in the same section, you have
- no hope of adding stubs. We'll error out later should the
- branch overflow. */
- if (tsec == isec)
- continue;
+typedef struct elf_linker_section_pointers
+{
+ /* next allocated pointer for this symbol */
+ struct elf_linker_section_pointers *next;
+ /* offset of pointer from beginning of section */
+ bfd_vma offset;
+ /* addend used */
+ bfd_vma addend;
+ /* which linker section this is */
+ elf_linker_section_t *lsect;
+} elf_linker_section_pointers_t;
- /* There probably isn't any reason to handle symbols in
- SEC_MERGE sections; SEC_MERGE doesn't seem a likely
- attribute for a code section, and we are only looking at
- branches. However, implement it correctly here as a
- reference for other target relax_section functions. */
- if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
- {
- /* At this stage in linking, no SEC_MERGE symbol has been
- adjusted, so all references to such symbols need to be
- passed through _bfd_merged_section_offset. (Later, in
- relocate_section, all SEC_MERGE symbols *except* for
- section symbols have been adjusted.)
+struct ppc_elf_obj_tdata
+{
+ struct elf_obj_tdata elf;
- gas may reduce relocations against symbols in SEC_MERGE
- sections to a relocation against the section symbol when
- the original addend was zero. When the reloc is against
- a section symbol we should include the addend in the
- offset passed to _bfd_merged_section_offset, since the
- location of interest is the original symbol. On the
- other hand, an access to "sym+addend" where "sym" is not
- a section symbol should not include the addend; Such an
- access is presumed to be an offset from "sym"; The
- location of interest is just "sym". */
- if (sym_type == STT_SECTION)
- toff += irel->r_addend;
+ /* A mapping from local symbols to offsets into the various linker
+ sections added. This is index by the symbol index. */
+ elf_linker_section_pointers_t **linker_section_pointers;
+};
- toff = _bfd_merged_section_offset (abfd, &tsec,
- elf_section_data (tsec)->sec_info,
- toff);
+#define ppc_elf_tdata(bfd) \
+ ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
- if (sym_type != STT_SECTION)
- toff += irel->r_addend;
- }
- else
- toff += irel->r_addend;
+#define elf_local_ptr_offsets(bfd) \
+ (ppc_elf_tdata (bfd)->linker_section_pointers)
- symaddr = tsec->output_section->vma + tsec->output_offset + toff;
+/* Override the generic function because we store some extras. */
- roff = irel->r_offset;
- reladdr = isec->output_section->vma + isec->output_offset + roff;
+static bfd_boolean
+ppc_elf_mkobject (bfd *abfd)
+{
+ if (abfd->tdata.any == NULL)
+ {
+ bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
+ abfd->tdata.any = bfd_zalloc (abfd, amt);
+ if (abfd->tdata.any == NULL)
+ return FALSE;
+ }
+ return bfd_elf_mkobject (abfd);
+}
- /* If the branch is in range, no need to do anything. */
- if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
- continue;
+/* Fix bad default arch selected for a 32 bit input bfd when the
+ default is 64 bit. */
- /* Look for an existing fixup to this address. */
- for (f = fixups; f ; f = f->next)
- if (f->tsec == tsec && f->toff == toff)
- break;
+static bfd_boolean
+ppc_elf_object_p (bfd *abfd)
+{
+ if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
+ {
+ Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
- if (f == NULL)
+ if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
{
- size_t size;
- unsigned long stub_rtype;
+ /* Relies on arch after 64 bit default being 32 bit default. */
+ abfd->arch_info = abfd->arch_info->next;
+ BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
+ }
+ }
+ return TRUE;
+}
- val = trampoff - roff;
- if (val >= max_branch_offset)
- /* Oh dear, we can't reach a trampoline. Don't try to add
- one. We'll report an error later. */
- continue;
+/* Function to set whether a module needs the -mrelocatable bit set. */
- if (link_info->shared)
- {
- size = 4 * ARRAY_SIZE (shared_stub_entry);
- insn_offset = 12;
- stub_rtype = R_PPC_RELAX32PC;
- }
- else
- {
- size = 4 * ARRAY_SIZE (stub_entry);
- insn_offset = 0;
- stub_rtype = R_PPC_RELAX32;
- }
+static bfd_boolean
+ppc_elf_set_private_flags (bfd *abfd, flagword flags)
+{
+ BFD_ASSERT (!elf_flags_init (abfd)
+ || elf_elfheader (abfd)->e_flags == flags);
- /* 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),
- stub_rtype);
- irel->r_offset = trampoff + insn_offset;
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_flags_init (abfd) = TRUE;
+ return TRUE;
+}
- /* Record the fixup so we don't do it again this section. */
- f = bfd_malloc (sizeof (*f));
- f->next = fixups;
- f->tsec = tsec;
- f->toff = toff;
- f->trampoff = trampoff;
- fixups = f;
+/* Support for core dump NOTE sections. */
- trampoff += size;
- }
- else
- {
- val = f->trampoff - roff;
- if (val >= max_branch_offset)
- continue;
+static bfd_boolean
+ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+ int offset;
+ unsigned int size;
- /* Nop out the reloc, since we're finalizing things here. */
- irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
- }
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
- /* Get the section contents. */
- if (contents == NULL)
- {
- /* Get cached copy if it exists. */
- if (elf_section_data (isec)->this_hdr.contents != NULL)
- contents = elf_section_data (isec)->this_hdr.contents;
- else
- {
- /* Go get them off disk. */
- if (!bfd_malloc_and_get_section (abfd, isec, &contents))
- goto error_return;
- }
- }
+ case 268: /* Linux/PPC. */
+ /* pr_cursig */
+ elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
- /* Fix up the existing branch to hit the trampoline. */
- hit_addr = contents + roff;
- switch (r_type)
- {
- case R_PPC_REL24:
- 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;
+ /* pr_pid */
+ elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
- case R_PPC_REL14:
- case R_PPC_REL14_BRTAKEN:
- case R_PPC_REL14_BRNTAKEN:
- t0 = bfd_get_32 (abfd, hit_addr);
- t0 &= ~0xfffc;
- t0 |= val & 0xfffc;
- bfd_put_32 (abfd, t0, hit_addr);
- break;
- }
+ /* pr_reg */
+ offset = 72;
+ size = 192;
+
+ break;
}
- /* Write out the trampolines. */
- changed = fixups != NULL;
- if (fixups != NULL)
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ size, note->descpos + offset);
+}
+
+static bfd_boolean
+ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+ switch (note->descsz)
{
- const int *stub;
- bfd_byte *dest;
- bfd_vma val;
- int i, size;
+ default:
+ return FALSE;
- do
- {
- struct one_fixup *f = fixups;
- fixups = fixups->next;
- free (f);
- }
- while (fixups);
+ case 128: /* Linux/PPC elf_prpsinfo. */
+ elf_tdata (abfd)->core_program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
+ elf_tdata (abfd)->core_command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
+ }
- contents = bfd_realloc (contents, trampoff);
- if (contents == NULL)
- goto error_return;
+ /* Note that for some reason, a spurious space is tacked
+ onto the end of the args in some (at least one anyway)
+ implementations, so strip it off if it exists. */
- isec->size = (isec->size + 3) & (bfd_vma) -4;
- /* Branch around the trampolines. */
- val = trampoff - isec->size + 0x48000000;
- dest = contents + isec->size;
- isec->size = trampoff;
- bfd_put_32 (abfd, val, dest);
- dest += 4;
+ {
+ char *command = elf_tdata (abfd)->core_command;
+ int n = strlen (command);
- if (link_info->shared)
- {
- stub = shared_stub_entry;
- size = ARRAY_SIZE (shared_stub_entry);
- }
- else
- {
- stub = stub_entry;
- size = ARRAY_SIZE (stub_entry);
- }
+ if (0 < n && command[n - 1] == ' ')
+ command[n - 1] = '\0';
+ }
- i = 0;
- while (dest < contents + trampoff)
- {
- bfd_put_32 (abfd, stub[i], dest);
- i++;
- if (i == size)
- i = 0;
- dest += 4;
- }
- BFD_ASSERT (i == 0);
- }
+ return TRUE;
+}
- if (isymbuf != NULL
- && symtab_hdr->contents != (unsigned char *) isymbuf)
+static char *
+ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
+{
+ switch (note_type)
{
- if (! link_info->keep_memory)
- free (isymbuf);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) isymbuf;
- }
- }
+ default:
+ return NULL;
- if (contents != NULL
- && elf_section_data (isec)->this_hdr.contents != contents)
- {
- if (!changed && !link_info->keep_memory)
- free (contents);
- else
- {
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (isec)->this_hdr.contents = contents;
- }
+ case NT_PRPSINFO:
+ {
+ char data[128];
+ va_list ap;
+
+ va_start (ap, note_type);
+ memset (data, 0, 32);
+ strncpy (data + 32, va_arg (ap, const char *), 16);
+ strncpy (data + 48, va_arg (ap, const char *), 80);
+ va_end (ap);
+ return elfcore_write_note (abfd, buf, bufsiz,
+ "CORE", note_type, data, sizeof (data));
+ }
+
+ case NT_PRSTATUS:
+ {
+ char data[268];
+ va_list ap;
+ long pid;
+ int cursig;
+ const void *greg;
+
+ va_start (ap, note_type);
+ memset (data, 0, 72);
+ pid = va_arg (ap, long);
+ bfd_put_32 (abfd, pid, data + 24);
+ cursig = va_arg (ap, int);
+ bfd_put_16 (abfd, cursig, data + 12);
+ greg = va_arg (ap, const void *);
+ memcpy (data + 72, greg, 192);
+ memset (data + 264, 0, 4);
+ va_end (ap);
+ return elfcore_write_note (abfd, buf, bufsiz,
+ "CORE", note_type, data, sizeof (data));
+ }
}
+}
- if (elf_section_data (isec)->relocs != internal_relocs)
- {
- if (!changed)
- free (internal_relocs);
- else
- elf_section_data (isec)->relocs = internal_relocs;
- }
+/* Return address for Ith PLT stub in section PLT, for relocation REL
+ or (bfd_vma) -1 if it should not be included. */
- *again = changed;
+static bfd_vma
+ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
+ const asection *plt ATTRIBUTE_UNUSED,
+ const arelent *rel)
+{
+ return rel->address;
+}
+
+/* Handle a PowerPC specific section when reading an object file. This
+ is called when bfd_section_from_shdr finds a section with an unknown
+ type. */
+
+static bfd_boolean
+ppc_elf_section_from_shdr (bfd *abfd,
+ Elf_Internal_Shdr *hdr,
+ const char *name,
+ int shindex)
+{
+ asection *newsect;
+ flagword flags;
+
+ if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
+ return FALSE;
+
+ newsect = hdr->bfd_section;
+ flags = bfd_get_section_flags (abfd, newsect);
+ if (hdr->sh_flags & SHF_EXCLUDE)
+ flags |= SEC_EXCLUDE;
+
+ if (hdr->sh_type == SHT_ORDERED)
+ flags |= SEC_SORT_ENTRIES;
+
+ bfd_set_section_flags (abfd, newsect, flags);
return TRUE;
+}
- error_return:
- if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
- free (isymbuf);
- if (contents != NULL
- && elf_section_data (isec)->this_hdr.contents != contents)
- free (contents);
- if (internal_relocs != NULL
- && elf_section_data (isec)->relocs != internal_relocs)
- free (internal_relocs);
- return FALSE;
+/* Set up any other section flags and such that may be necessary. */
+
+static bfd_boolean
+ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
+ Elf_Internal_Shdr *shdr,
+ asection *asect)
+{
+ if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
+ shdr->sh_flags |= SHF_EXCLUDE;
+
+ if ((asect->flags & SEC_SORT_ENTRIES) != 0)
+ shdr->sh_type = SHT_ORDERED;
+
+ return TRUE;
+}
+
+/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
+ need to bump up the number of section headers. */
+
+static int
+ppc_elf_additional_program_headers (bfd *abfd,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+ asection *s;
+ int ret = 0;
+
+ s = bfd_get_section_by_name (abfd, ".sbss2");
+ if (s != NULL && (s->flags & SEC_ALLOC) != 0)
+ ++ret;
+
+ s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
+ if (s != NULL && (s->flags & SEC_ALLOC) != 0)
+ ++ret;
+
+ return ret;
+}
+
+/* Add extra PPC sections -- Note, for now, make .sbss2 and
+ .PPC.EMB.sbss0 a normal section, and not a bss section so
+ that the linker doesn't crater when trying to make more than
+ 2 sections. */
+
+static const struct bfd_elf_special_section ppc_elf_special_sections[] =
+{
+ { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
+ { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
+ { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
+ { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
+ { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
+ { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
+ { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
+ { NULL, 0, 0, 0, 0 }
+};
+
+/* This is what we want for new plt/got. */
+static struct bfd_elf_special_section ppc_alt_plt =
+ { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
+
+static const struct bfd_elf_special_section *
+ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
+{
+ const struct bfd_elf_special_section *ssect;
+
+ /* See if this is one of the special sections. */
+ if (sec->name == NULL)
+ return NULL;
+
+ ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
+ sec->use_rela_p);
+ if (ssect != NULL)
+ {
+ if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
+ ssect = &ppc_alt_plt;
+ return ssect;
+ }
+
+ return _bfd_elf_get_sec_type_attr (abfd, sec);
}
\f
-static reloc_howto_type *
-ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
+/* Very simple linked list structure for recording apuinfo values. */
+typedef struct apuinfo_list
{
- enum elf_ppc_reloc_type r;
+ struct apuinfo_list *next;
+ unsigned long value;
+}
+apuinfo_list;
- /* Initialize howto table if not already done. */
- if (!ppc_elf_howto_table[R_PPC_ADDR32])
- ppc_elf_howto_init ();
+static apuinfo_list *head;
- switch (code)
+
+static void
+apuinfo_list_init (void)
+{
+ head = NULL;
+}
+
+static void
+apuinfo_list_add (unsigned long value)
+{
+ apuinfo_list *entry = head;
+
+ while (entry != NULL)
{
- default:
- return NULL;
+ if (entry->value == value)
+ return;
+ entry = entry->next;
+ }
- case BFD_RELOC_NONE: r = R_PPC_NONE; break;
- case BFD_RELOC_32: r = R_PPC_ADDR32; break;
- case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
- case BFD_RELOC_16: r = R_PPC_ADDR16; break;
- case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
- case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
- case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
- case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
- case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
- case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
- case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
- case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
- case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
- case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
- case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
- case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
- case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
- case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
- case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
- case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
- case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
- case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
- case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
- case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
- case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
- case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
- case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
- case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
- case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
- case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
- case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
- case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
- case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
- case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
- case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
- case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
- case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
- case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
- case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
- case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
- case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
- case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
- case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
- case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
- case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
- case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
- case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
- case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
- case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
- case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
- case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
- case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
- case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
- case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
- case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
- case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
- case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
- case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
- case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
- case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
- case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
- case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
- case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
- case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
- case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
- case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
- case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
- case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
- case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
- case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
- case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
- case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
- case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
- case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
- case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
- case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
- case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
- case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
- case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
- case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
- case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
- }
-
- return ppc_elf_howto_table[r];
-};
-
-/* Set the howto pointer for a PowerPC ELF reloc. */
-
-static void
-ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
- arelent *cache_ptr,
- Elf_Internal_Rela *dst)
-{
- /* Initialize howto table if not already done. */
- if (!ppc_elf_howto_table[R_PPC_ADDR32])
- ppc_elf_howto_init ();
+ entry = bfd_malloc (sizeof (* entry));
+ if (entry == NULL)
+ return;
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
- cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+ entry->value = value;
+ entry->next = head;
+ head = entry;
}
-/* Handle the R_PPC_ADDR16_HA reloc. */
-
-static bfd_reloc_status_type
-ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
- arelent *reloc_entry,
- asymbol *symbol,
- void *data ATTRIBUTE_UNUSED,
- asection *input_section,
- bfd *output_bfd,
- char **error_message ATTRIBUTE_UNUSED)
+static unsigned
+apuinfo_list_length (void)
{
- bfd_vma relocation;
-
- if (output_bfd != NULL)
- {
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
- }
+ apuinfo_list *entry;
+ unsigned long count;
- if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
- return bfd_reloc_outofrange;
+ for (entry = head, count = 0;
+ entry;
+ entry = entry->next)
+ ++ count;
- if (bfd_is_com_section (symbol->section))
- relocation = 0;
- else
- relocation = symbol->value;
+ return count;
+}
- relocation += symbol->section->output_section->vma;
- relocation += symbol->section->output_offset;
- relocation += reloc_entry->addend;
+static inline unsigned long
+apuinfo_list_element (unsigned long number)
+{
+ apuinfo_list * entry;
- reloc_entry->addend += (relocation & 0x8000) << 1;
+ for (entry = head;
+ entry && number --;
+ entry = entry->next)
+ ;
- return bfd_reloc_continue;
+ return entry ? entry->value : 0;
}
-static bfd_reloc_status_type
-ppc_elf_unhandled_reloc (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void *data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message)
+static void
+apuinfo_list_finish (void)
{
- /* If this is a relocatable link (output_bfd test tells us), just
- call the generic function. Any adjustment will be done at final
- link time. */
- if (output_bfd != NULL)
- return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message);
+ apuinfo_list *entry;
- if (error_message != NULL)
+ for (entry = head; entry;)
{
- static char buf[60];
- sprintf (buf, _("generic linker can't handle %s"),
- reloc_entry->howto->name);
- *error_message = buf;
+ apuinfo_list *next = entry->next;
+ free (entry);
+ entry = next;
}
- return bfd_reloc_dangerous;
+
+ head = NULL;
}
-/* Fix bad default arch selected for a 32 bit input bfd when the
- default is 64 bit. */
+#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
+#define APUINFO_LABEL "APUinfo"
-static bfd_boolean
-ppc_elf_object_p (bfd *abfd)
+/* Scan the input BFDs and create a linked list of
+ the APUinfo values that will need to be emitted. */
+
+static void
+ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
{
- if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
- {
- Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
+ bfd *ibfd;
+ asection *asec;
+ char *buffer;
+ unsigned num_input_sections;
+ bfd_size_type output_section_size;
+ unsigned i;
+ unsigned num_entries;
+ unsigned long offset;
+ unsigned long length;
+ const char *error_message = NULL;
- if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
+ if (link_info == NULL)
+ return;
+
+ /* Scan the input bfds, looking for apuinfo sections. */
+ num_input_sections = 0;
+ output_section_size = 0;
+
+ for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
+ {
+ asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
+ if (asec)
{
- /* Relies on arch after 64 bit default being 32 bit default. */
- abfd->arch_info = abfd->arch_info->next;
- BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
+ ++ num_input_sections;
+ output_section_size += asec->size;
}
}
- return TRUE;
-}
-
-/* Function to set whether a module needs the -mrelocatable bit set. */
-static bfd_boolean
-ppc_elf_set_private_flags (bfd *abfd, flagword flags)
-{
- BFD_ASSERT (!elf_flags_init (abfd)
- || elf_elfheader (abfd)->e_flags == flags);
+ /* We need at least one input sections
+ in order to make merging worthwhile. */
+ if (num_input_sections < 1)
+ return;
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = TRUE;
- return TRUE;
-}
+ /* Just make sure that the output section exists as well. */
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+ if (asec == NULL)
+ return;
-/* Merge backend specific data from an object file to the output
- object file when linking. */
+ /* Allocate a buffer for the contents of the input sections. */
+ buffer = bfd_malloc (output_section_size);
+ if (buffer == NULL)
+ return;
-static bfd_boolean
-ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
-{
- flagword old_flags;
- flagword new_flags;
- bfd_boolean error;
+ offset = 0;
+ apuinfo_list_init ();
- /* Check if we have the same endianess. */
- if (! _bfd_generic_verify_endian_match (ibfd, obfd))
- return FALSE;
-
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return TRUE;
-
- new_flags = elf_elfheader (ibfd)->e_flags;
- old_flags = elf_elfheader (obfd)->e_flags;
- if (!elf_flags_init (obfd))
+ /* Read in the input sections contents. */
+ for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
{
- /* First call, no flags set. */
- elf_flags_init (obfd) = TRUE;
- elf_elfheader (obfd)->e_flags = new_flags;
- }
+ unsigned long datum;
+ char *ptr;
- /* Compatible flags are ok. */
- else if (new_flags == old_flags)
- ;
+ asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
+ if (asec == NULL)
+ continue;
- /* Incompatible flags. */
- else
- {
- /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
- to be linked with either. */
- error = FALSE;
- if ((new_flags & EF_PPC_RELOCATABLE) != 0
- && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
+ length = asec->size;
+ if (length < 24)
{
- error = TRUE;
- (*_bfd_error_handler)
- (_("%B: compiled with -mrelocatable and linked with "
- "modules compiled normally"), ibfd);
+ error_message = _("corrupt or empty %s section in %B");
+ goto fail;
}
- else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
- && (old_flags & EF_PPC_RELOCATABLE) != 0)
+
+ if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
+ || (bfd_bread (buffer + offset, length, ibfd) != length))
{
- error = TRUE;
- (*_bfd_error_handler)
- (_("%B: compiled normally and linked with "
- "modules compiled with -mrelocatable"), ibfd);
+ error_message = _("unable to read in %s section from %B");
+ goto fail;
}
- /* The output is -mrelocatable-lib iff both the input files are. */
- if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
- elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
+ /* Process the contents of the section. */
+ ptr = buffer + offset;
+ error_message = _("corrupt %s section in %B");
- /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
- but each input file is either -mrelocatable or -mrelocatable-lib. */
- if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
- && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
- && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
- elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
+ /* Verify the contents of the header. Note - we have to
+ extract the values this way in order to allow for a
+ host whose endian-ness is different from the target. */
+ datum = bfd_get_32 (ibfd, ptr);
+ if (datum != sizeof APUINFO_LABEL)
+ goto fail;
- /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
- any module uses it. */
- elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
+ datum = bfd_get_32 (ibfd, ptr + 8);
+ if (datum != 0x2)
+ goto fail;
- new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
- old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+ if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
+ goto fail;
- /* Warn about any other mismatches. */
- if (new_flags != old_flags)
- {
- error = TRUE;
- (*_bfd_error_handler)
- (_("%B: uses different e_flags (0x%lx) fields "
- "than previous modules (0x%lx)"),
- ibfd, (long) new_flags, (long) old_flags);
- }
+ /* Get the number of bytes used for apuinfo entries. */
+ datum = bfd_get_32 (ibfd, ptr + 4);
+ if (datum + 20 != length)
+ goto fail;
- if (error)
- {
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
- }
+ /* Make sure that we do not run off the end of the section. */
+ if (offset + length > output_section_size)
+ goto fail;
+
+ /* Scan the apuinfo section, building a list of apuinfo numbers. */
+ for (i = 0; i < datum; i += 4)
+ apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
+
+ /* Update the offset. */
+ offset += length;
}
- return TRUE;
-}
-\f
-/* Handle a PowerPC specific section when reading an object file. This
- is called when elfcode.h finds a section with an unknown type. */
+ error_message = NULL;
-static bfd_boolean
-ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
-{
- asection *newsect;
- flagword flags;
+ /* Compute the size of the output section. */
+ num_entries = apuinfo_list_length ();
+ output_section_size = 20 + num_entries * 4;
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return FALSE;
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- newsect = hdr->bfd_section;
- flags = bfd_get_section_flags (abfd, newsect);
- if (hdr->sh_flags & SHF_EXCLUDE)
- flags |= SEC_EXCLUDE;
+ if (! bfd_set_section_size (abfd, asec, output_section_size))
+ ibfd = abfd,
+ error_message = _("warning: unable to set size of %s section in %B");
- if (hdr->sh_type == SHT_ORDERED)
- flags |= SEC_SORT_ENTRIES;
+ fail:
+ free (buffer);
- bfd_set_section_flags (abfd, newsect, flags);
- return TRUE;
+ if (error_message)
+ (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
}
-\f
-/* Set up any other section flags and such that may be necessary. */
+
+/* Prevent the output section from accumulating the input sections'
+ contents. We have already stored this in our linked list structure. */
static bfd_boolean
-ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
- Elf_Internal_Shdr *shdr,
- asection *asect)
+ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ asection *asec,
+ bfd_byte *contents ATTRIBUTE_UNUSED)
{
- if ((asect->flags & SEC_EXCLUDE) != 0)
- shdr->sh_flags |= SHF_EXCLUDE;
-
- if ((asect->flags & SEC_SORT_ENTRIES) != 0)
- shdr->sh_type = SHT_ORDERED;
-
- return TRUE;
+ return (apuinfo_list_length ()
+ && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
}
-\f
-/* Find a linker generated pointer with a given addend and type. */
-static elf_linker_section_pointers_t *
-elf_find_pointer_linker_section
- (elf_linker_section_pointers_t *linker_pointers,
- bfd_vma addend,
- elf_linker_section_t *lsect)
+/* Finally we can generate the output section. */
+
+static void
+ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
{
- for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
- if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
- return linker_pointers;
+ bfd_byte *buffer;
+ asection *asec;
+ unsigned i;
+ unsigned num_entries;
+ bfd_size_type length;
- return NULL;
-}
-\f
-/* Allocate a pointer to live in a linker created section. */
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+ if (asec == NULL)
+ return;
-static bfd_boolean
-elf_create_pointer_linker_section (bfd *abfd,
- struct bfd_link_info *info,
- elf_linker_section_t *lsect,
- struct elf_link_hash_entry *h,
- const Elf_Internal_Rela *rel)
-{
- elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
- elf_linker_section_pointers_t *linker_section_ptr;
- unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
- bfd_size_type amt;
+ if (apuinfo_list_length () == 0)
+ return;
- BFD_ASSERT (lsect != NULL);
+ length = asec->size;
+ if (length < 20)
+ return;
- /* Is this a global symbol? */
- if (h != NULL)
+ buffer = bfd_malloc (length);
+ if (buffer == NULL)
{
- struct ppc_elf_link_hash_entry *eh;
-
- /* Has this symbol already been allocated? If so, our work is done. */
- eh = (struct ppc_elf_link_hash_entry *) h;
- if (elf_find_pointer_linker_section (eh->linker_section_pointer,
- rel->r_addend,
- lsect))
- return TRUE;
+ (*_bfd_error_handler)
+ (_("failed to allocate space for new APUinfo section."));
+ return;
+ }
- ptr_linker_section_ptr = &eh->linker_section_pointer;
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ /* Create the apuinfo header. */
+ num_entries = apuinfo_list_length ();
+ bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
+ bfd_put_32 (abfd, num_entries * 4, buffer + 4);
+ bfd_put_32 (abfd, 0x2, buffer + 8);
+ strcpy ((char *) buffer + 12, APUINFO_LABEL);
- if (lsect->rel_section)
- lsect->rel_section->size += sizeof (Elf32_External_Rela);
- }
- else
+ length = 20;
+ for (i = 0; i < num_entries; i++)
{
- /* Allocation of a pointer to a local symbol. */
- elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
-
- /* Allocate a table to hold the local symbols if first time. */
- if (!ptr)
- {
- unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
+ bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
+ length += 4;
+ }
- amt = num_symbols;
- amt *= sizeof (elf_linker_section_pointers_t *);
- ptr = bfd_zalloc (abfd, amt);
+ if (length != asec->size)
+ (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
- if (!ptr)
- return FALSE;
+ if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
+ (*_bfd_error_handler) (_("failed to install new APUinfo section."));
- elf_local_ptr_offsets (abfd) = ptr;
- }
+ free (buffer);
- /* Has this symbol already been allocated? If so, our work is done. */
- if (elf_find_pointer_linker_section (ptr[r_symndx],
- rel->r_addend,
- lsect))
- return TRUE;
+ apuinfo_list_finish ();
+}
+\f
+/* The following functions are specific to the ELF linker, while
+ functions above are used generally. They appear in this file more
+ or less in the order in which they are called. eg.
+ ppc_elf_check_relocs is called early in the link process,
+ ppc_elf_finish_dynamic_sections is one of the last functions
+ called. */
- ptr_linker_section_ptr = &ptr[r_symndx];
-
- if (info->shared)
- {
- /* If we are generating a shared object, we need to
- output a R_<xxx>_RELATIVE reloc so that the
- dynamic linker can adjust this GOT entry. */
- BFD_ASSERT (lsect->rel_section != NULL);
- lsect->rel_section->size += sizeof (Elf32_External_Rela);
- }
- }
+/* The PPC linker needs to keep track of the number of relocs that it
+ decides to copy as dynamic relocs in check_relocs for each symbol.
+ This is so that it can later discard them if they are found to be
+ unnecessary. We store the information in a field extending the
+ regular ELF linker hash table. */
- /* Allocate space for a pointer in the linker section, and allocate
- a new pointer record from internal memory. */
- BFD_ASSERT (ptr_linker_section_ptr != NULL);
- amt = sizeof (elf_linker_section_pointers_t);
- linker_section_ptr = bfd_alloc (abfd, amt);
+struct ppc_elf_dyn_relocs
+{
+ struct ppc_elf_dyn_relocs *next;
- if (!linker_section_ptr)
- return FALSE;
+ /* The input section of the reloc. */
+ asection *sec;
- linker_section_ptr->next = *ptr_linker_section_ptr;
- linker_section_ptr->addend = rel->r_addend;
- linker_section_ptr->lsect = lsect;
- linker_section_ptr->written_address_p = FALSE;
- *ptr_linker_section_ptr = linker_section_ptr;
+ /* Total number of relocs copied for the input section. */
+ bfd_size_type count;
- linker_section_ptr->offset = lsect->section->size;
- lsect->section->size += 4;
+ /* Number of pc-relative relocs copied for the input section. */
+ bfd_size_type pc_count;
+};
-#ifdef DEBUG
- fprintf (stderr,
- "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
- lsect->name, (long) linker_section_ptr->offset,
- (long) lsect->section->size);
-#endif
+/* Track PLT entries needed for a given symbol. We might need more
+ than one glink entry per symbol. */
+struct plt_entry
+{
+ struct plt_entry *next;
- return TRUE;
-}
-\f
-#define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
+ /* -fPIC uses multiple GOT sections, one per file, called ".got2".
+ This field stores the offset into .got2 used to initialise the
+ GOT pointer reg. It will always be at least 32768 (and for
+ current gcc this is the only offset used). */
+ bfd_vma addend;
-/* Fill in the address for a pointer generated in a linker section. */
+ /* The .got2 section. */
+ asection *sec;
-static bfd_vma
-elf_finish_pointer_linker_section (bfd *output_bfd,
- bfd *input_bfd,
- struct bfd_link_info *info,
- elf_linker_section_t *lsect,
- struct elf_link_hash_entry *h,
- bfd_vma relocation,
- const Elf_Internal_Rela *rel,
- int relative_reloc)
-{
- elf_linker_section_pointers_t *linker_section_ptr;
+ /* PLT refcount or offset. */
+ union
+ {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } plt;
- BFD_ASSERT (lsect != NULL);
+ /* .glink stub offset. */
+ bfd_vma glink_offset;
+};
- if (h != NULL)
- {
- /* Handle global symbol. */
- struct ppc_elf_link_hash_entry *eh;
+/* Of those relocs that might be copied as dynamic relocs, this macro
+ selects those that must be copied when linking a shared library,
+ even when the symbol is local. */
- eh = (struct ppc_elf_link_hash_entry *) h;
- linker_section_ptr
- = elf_find_pointer_linker_section (eh->linker_section_pointer,
- rel->r_addend,
- lsect);
+#define MUST_BE_DYN_RELOC(RTYPE) \
+ ((RTYPE) != R_PPC_REL24 \
+ && (RTYPE) != R_PPC_REL14 \
+ && (RTYPE) != R_PPC_REL14_BRTAKEN \
+ && (RTYPE) != R_PPC_REL14_BRNTAKEN \
+ && (RTYPE) != R_PPC_REL32)
- BFD_ASSERT (linker_section_ptr != NULL);
+/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
+ copying dynamic variables from a shared lib into an app's dynbss
+ section, and instead use a dynamic relocation to point into the
+ shared lib. */
+#define ELIMINATE_COPY_RELOCS 1
- if (! elf_hash_table (info)->dynamic_sections_created
- || (info->shared
- && info->symbolic
- && h->def_regular))
- {
- /* This is actually a static link, or it is a
- -Bsymbolic link and the symbol is defined
- locally. We must initialize this entry in the
- global section.
-
- When doing a dynamic link, we create a .rela.<xxx>
- relocation entry to initialize the value. This
- is done in the finish_dynamic_symbol routine. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = TRUE;
- bfd_put_ptr (output_bfd,
- relocation + linker_section_ptr->addend,
- (lsect->section->contents
- + linker_section_ptr->offset));
- }
- }
- }
- else
- {
- /* Handle local symbol. */
- unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
- linker_section_ptr = (elf_find_pointer_linker_section
- (elf_local_ptr_offsets (input_bfd)[r_symndx],
- rel->r_addend,
- lsect));
+/* PPC ELF linker hash entry. */
- BFD_ASSERT (linker_section_ptr != NULL);
+struct ppc_elf_link_hash_entry
+{
+ struct elf_link_hash_entry elf;
- /* Write out pointer if it hasn't been rewritten out before. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = TRUE;
- bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
- lsect->section->contents + linker_section_ptr->offset);
+ /* If this symbol is used in the linker created sections, the processor
+ specific backend uses this field to map the field into the offset
+ from the beginning of the section. */
+ elf_linker_section_pointers_t *linker_section_pointer;
- if (info->shared)
- {
- /* We need to generate a relative reloc for the dynamic
- linker. */
+ /* Track dynamic relocs copied for this symbol. */
+ struct ppc_elf_dyn_relocs *dyn_relocs;
- asection *srel = lsect->rel_section;
- Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
- bfd_byte *erel;
- const struct elf_backend_data *bed;
- unsigned int i;
+ /* Contexts in which symbol is used in the GOT (or TOC).
+ TLS_GD .. TLS_TLS bits are or'd into the mask as the
+ corresponding relocs are encountered during check_relocs.
+ tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
+ indicate the corresponding GOT entry type is not needed. */
+#define TLS_GD 1 /* GD reloc. */
+#define TLS_LD 2 /* LD reloc. */
+#define TLS_TPREL 4 /* TPREL reloc, => IE. */
+#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
+#define TLS_TLS 16 /* Any TLS reloc. */
+#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
+ char tls_mask;
- BFD_ASSERT (srel != NULL);
+ /* Nonzero if we have seen a small data relocation referring to this
+ symbol. */
+ unsigned char has_sda_refs;
+};
- bed = get_elf_backend_data (output_bfd);
- for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
- {
- outrel[i].r_offset = (lsect->section->output_section->vma
- + lsect->section->output_offset
- + linker_section_ptr->offset);
- outrel[i].r_info = 0;
- outrel[i].r_addend = 0;
- }
- outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
- erel = lsect->section->contents;
- erel += (elf_section_data (lsect->section)->rel_count++
- * sizeof (Elf32_External_Rela));
- bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
- }
- }
- }
+#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
- relocation = (lsect->section->output_offset
- + linker_section_ptr->offset
- - lsect->sym_offset);
+enum ppc_elf_plt_type {
+ PLT_UNSET,
+ PLT_OLD,
+ PLT_NEW,
+ PLT_VXWORKS
+};
-#ifdef DEBUG
- fprintf (stderr,
- "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
- lsect->name, (long) relocation, (long) relocation);
-#endif
+/* PPC ELF linker hash table. */
- /* Subtract out the addend, because it will get added back in by the normal
- processing. */
- return relocation - linker_section_ptr->addend;
-}
-\f
-/* Create a special linker section */
-static elf_linker_section_t *
-ppc_elf_create_linker_section (bfd *abfd,
- struct bfd_link_info *info,
- enum elf_linker_section_enum which)
+struct ppc_elf_link_hash_table
{
- elf_linker_section_t *lsect;
- struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
- asection *s, *sym_sec;
- bfd_size_type amt;
- flagword flags;
- const char *name;
- const char *rel_name;
- const char *sym_name;
- bfd_vma sym_offset;
+ struct elf_link_hash_table elf;
- /* Both of these sections are (technically) created by the user
- putting data in them, so they shouldn't be marked
- SEC_LINKER_CREATED.
+ /* Short-cuts to get to dynamic linker sections. */
+ asection *got;
+ asection *relgot;
+ asection *glink;
+ asection *plt;
+ asection *relplt;
+ asection *dynbss;
+ asection *relbss;
+ asection *dynsbss;
+ asection *relsbss;
+ elf_linker_section_t sdata[2];
+ asection *sbss;
- The linker creates them so it has somewhere to attach their
- respective symbols. In fact, if they were empty it would
- be OK to leave the symbol set to 0 (or any random number), because
- the appropriate register should never be used. */
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
- sym_offset = 32768;
+ /* Shortcut to .__tls_get_addr. */
+ struct elf_link_hash_entry *tls_get_addr;
- switch (which)
- {
- default:
- abort ();
- return NULL;
+ /* TLS local dynamic got entry handling. */
+ union {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } tlsld_got;
- case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
- name = ".sdata";
- rel_name = ".rela.sdata";
- sym_name = "_SDA_BASE_";
- break;
+ /* Offset of PltResolve function in glink. */
+ bfd_vma glink_pltresolve;
- case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
- name = ".sdata2";
- rel_name = ".rela.sdata2";
- sym_name = "_SDA2_BASE_";
- flags |= SEC_READONLY;
- break;
- }
+ /* Size of reserved GOT entries. */
+ unsigned int got_header_size;
+ /* Non-zero if allocating the header left a gap. */
+ unsigned int got_gap;
- /* Record the first bfd that needs the special sections. */
- if (!htab->elf.dynobj)
- htab->elf.dynobj = abfd;
+ /* The type of PLT we have chosen to use. */
+ enum ppc_elf_plt_type plt_type;
- amt = sizeof (elf_linker_section_t);
- lsect = bfd_zalloc (htab->elf.dynobj, amt);
+ /* Whether we can use the new PLT layout. */
+ unsigned int can_use_new_plt:1;
- lsect->sym_offset = sym_offset;
+ /* Set if we should emit symbols for stubs. */
+ unsigned int emit_stub_syms:1;
- /* See if the sections already exist. */
- sym_sec = s = bfd_get_section_by_name (htab->elf.dynobj, name);
- if (s == NULL || (s->flags & flags) != flags)
- {
- s = bfd_make_section_anyway (htab->elf.dynobj, name);
- if (s == NULL
- || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
- return NULL;
- if (sym_sec == NULL)
- sym_sec = s;
- }
- lsect->section = s;
+ /* Small local sym to section mapping cache. */
+ struct sym_sec_cache sym_sec;
- if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
- && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
- return NULL;
+ /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
+ asection *srelplt2;
- s->size = align_power (s->size, 2);
+ /* The .got.plt section (VxWorks only)*/
+ asection *sgotplt;
-#ifdef DEBUG
- fprintf (stderr, "Creating section %s, current size = %ld\n",
- name, (long) s->size);
-#endif
+ /* True if the target system is VxWorks. */
+ int is_vxworks;
- if (sym_name)
- {
- struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh;
+ /* The size of PLT entries. */
+ int plt_entry_size;
+ /* The distance between adjacent PLT slots. */
+ int plt_slot_size;
+ /* The size of the first PLT entry. */
+ int plt_initial_entry_size;
+};
-#ifdef DEBUG
- fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
-#endif
- bh = bfd_link_hash_lookup (info->hash, sym_name,
- FALSE, FALSE, FALSE);
+/* Get the PPC ELF linker hash table from a link_info structure. */
- if ((bh == NULL || bh->type == bfd_link_hash_undefined)
- && !(_bfd_generic_link_add_one_symbol
- (info, abfd, sym_name, BSF_GLOBAL, sym_sec, sym_offset, NULL,
- FALSE, get_elf_backend_data (abfd)->collect, &bh)))
- return NULL;
- h = (struct elf_link_hash_entry *) bh;
+#define ppc_elf_hash_table(p) \
+ ((struct ppc_elf_link_hash_table *) (p)->hash)
- h->type = STT_OBJECT;
- lsect->sym_hash = h;
+/* Create an entry in a PPC ELF linker hash table. */
- if (info->shared
- && ! bfd_elf_link_record_dynamic_symbol (info, h))
- return NULL;
+static struct bfd_hash_entry *
+ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = bfd_hash_allocate (table,
+ sizeof (struct ppc_elf_link_hash_entry));
+ if (entry == NULL)
+ return entry;
}
- if (info->shared)
+ /* Call the allocation method of the superclass. */
+ entry = _bfd_elf_link_hash_newfunc (entry, table, string);
+ if (entry != NULL)
{
- s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
- lsect->rel_section = s;
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED | SEC_READONLY);
- if (s == NULL
- || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
- || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
- return NULL;
+ ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
+ ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
+ ppc_elf_hash_entry (entry)->tls_mask = 0;
}
- return lsect;
+ return entry;
}
-\f
-/* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
- need to bump up the number of section headers. */
-static int
-ppc_elf_additional_program_headers (bfd *abfd)
+/* Create a PPC ELF linker hash table. */
+
+static struct bfd_link_hash_table *
+ppc_elf_link_hash_table_create (bfd *abfd)
{
- asection *s;
- int ret;
+ struct ppc_elf_link_hash_table *ret;
- ret = 0;
+ ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
+ if (ret == NULL)
+ return NULL;
- s = bfd_get_section_by_name (abfd, ".interp");
- if (s != NULL)
- ++ret;
+ if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
+ ppc_elf_link_hash_newfunc,
+ sizeof (struct ppc_elf_link_hash_entry)))
+ {
+ free (ret);
+ return NULL;
+ }
- s = bfd_get_section_by_name (abfd, ".sbss2");
- if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size > 0)
- ++ret;
+ ret->elf.init_plt_refcount.refcount = 0;
+ ret->elf.init_plt_refcount.glist = NULL;
+ ret->elf.init_plt_offset.offset = 0;
+ ret->elf.init_plt_offset.glist = NULL;
- s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
- if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size > 0)
- ++ret;
+ ret->sdata[0].name = ".sdata";
+ ret->sdata[0].sym_name = "_SDA_BASE_";
+ ret->sdata[0].bss_name = ".sbss";
- return ret;
+ ret->sdata[1].name = ".sdata2";
+ ret->sdata[1].sym_name = "_SDA2_BASE_";
+ ret->sdata[1].bss_name = ".sbss2";
+
+ ret->plt_entry_size = 12;
+ ret->plt_slot_size = 8;
+ ret->plt_initial_entry_size = 72;
+
+ ret->is_vxworks = 0;
+
+ return &ret->elf.root;
}
-\f
-/* The powerpc .got has a blrl instruction in it. Mark it executable. */
+
+/* Create .got and the related sections. */
static bfd_boolean
ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
if (s == NULL)
abort ();
- flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
- if (!bfd_set_section_flags (abfd, s, flags))
- return FALSE;
+ if (htab->is_vxworks)
+ {
+ htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
+ if (!htab->sgotplt)
+ abort ();
+ }
+ else
+ {
+ /* The powerpc .got has a blrl instruction in it. Mark it
+ executable. */
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ if (!bfd_set_section_flags (abfd, s, flags))
+ return FALSE;
+ }
- htab->relgot = bfd_make_section (abfd, ".rela.got");
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED | SEC_READONLY);
+ htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
if (!htab->relgot
- || ! bfd_set_section_flags (abfd, htab->relgot,
- (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY | SEC_LINKER_CREATED
- | SEC_READONLY))
|| ! bfd_set_section_alignment (abfd, htab->relgot, 2))
return FALSE;
if (!_bfd_elf_create_dynamic_sections (abfd, info))
return FALSE;
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
- htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
+ s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
+ htab->glink = s;
if (s == NULL
- || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
+ || !bfd_set_section_alignment (abfd, s, 4))
+ return FALSE;
+
+ htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
+ s = bfd_make_section_with_flags (abfd, ".dynsbss",
+ SEC_ALLOC | SEC_LINKER_CREATED);
+ htab->dynsbss = s;
+ if (s == NULL)
return FALSE;
if (! info->shared)
{
htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
- htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
+ s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
+ htab->relsbss = s;
if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
|| ! bfd_set_section_alignment (abfd, s, 2))
return FALSE;
}
+ if (htab->is_vxworks
+ && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
+ return FALSE;
+
htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
if (s == NULL)
abort ();
- flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
+ flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
+ if (htab->plt_type == PLT_VXWORKS)
+ /* The VxWorks PLT is a loaded section with contents. */
+ flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
return bfd_set_section_flags (abfd, s, flags);
}
-/* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
+/* Copy the extra info we tack onto an elf_link_hash_entry. */
-static bfd_boolean
-ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
+static void
+ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
{
- struct ppc_elf_link_hash_table *htab;
- asection *s;
- unsigned int power_of_two;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
- h->root.root.string);
-#endif
+ struct ppc_elf_link_hash_entry *edir, *eind;
- /* Make sure we know what is going on here. */
- htab = ppc_elf_hash_table (info);
- BFD_ASSERT (htab->elf.dynobj != NULL
- && (h->needs_plt
- || h->u.weakdef != NULL
- || (h->def_dynamic
- && h->ref_regular
- && !h->def_regular)));
+ edir = (struct ppc_elf_link_hash_entry *) dir;
+ eind = (struct ppc_elf_link_hash_entry *) ind;
- /* Deal with function syms. */
- if (h->type == STT_FUNC
- || h->needs_plt)
+ if (eind->dyn_relocs != NULL)
{
- /* Clear procedure linkage table information for any symbol that
- won't need a .plt entry. */
- if (h->plt.refcount <= 0
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
+ if (edir->dyn_relocs != NULL)
{
- /* A PLT entry is not required/allowed when:
-
- 1. We are not using ld.so; because then the PLT entry
- can't be set up, so we can't use one. In this case,
- ppc_elf_adjust_dynamic_symbol won't even be called.
+ struct ppc_elf_dyn_relocs **pp;
+ struct ppc_elf_dyn_relocs *p;
- 2. GC has rendered the entry unused.
+ /* Add reloc counts against the indirect sym to the direct sym
+ list. Merge any entries against the same section. */
+ for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
+ {
+ struct ppc_elf_dyn_relocs *q;
- 3. We know for certain that a call to this symbol
- will go to this object, or will remain undefined. */
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
+ for (q = edir->dyn_relocs; q != NULL; q = q->next)
+ if (q->sec == p->sec)
+ {
+ q->pc_count += p->pc_count;
+ q->count += p->count;
+ *pp = p->next;
+ break;
+ }
+ if (q == NULL)
+ pp = &p->next;
+ }
+ *pp = edir->dyn_relocs;
}
- return TRUE;
- }
- else
- h->plt.offset = (bfd_vma) -1;
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->u.weakdef != NULL)
- {
- BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
- || h->u.weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->u.weakdef->root.u.def.section;
- h->root.u.def.value = h->u.weakdef->root.u.def.value;
- if (ELIMINATE_COPY_RELOCS)
- h->non_got_ref = h->u.weakdef->non_got_ref;
- return TRUE;
+ edir->dyn_relocs = eind->dyn_relocs;
+ eind->dyn_relocs = NULL;
}
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
-
- /* If we are creating a shared library, we must presume that the
- only references to the symbol are via the global offset table.
- For such cases we need not do anything here; the relocations will
- be handled correctly by relocate_section. */
- if (info->shared)
- return TRUE;
+ edir->tls_mask |= eind->tls_mask;
+ edir->has_sda_refs |= eind->has_sda_refs;
+
+ /* If called to transfer flags for a weakdef during processing
+ of elf_adjust_dynamic_symbol, don't copy non_got_ref.
+ We clear it ourselves for ELIMINATE_COPY_RELOCS. */
+ if (!(ELIMINATE_COPY_RELOCS
+ && eind->elf.root.type != bfd_link_hash_indirect
+ && edir->elf.dynamic_adjusted))
+ edir->elf.non_got_ref |= eind->elf.non_got_ref;
+
+ edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
+ edir->elf.ref_regular |= eind->elf.ref_regular;
+ edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
+ edir->elf.needs_plt |= eind->elf.needs_plt;
+
+ /* If we were called to copy over info for a weak sym, that's all. */
+ if (eind->elf.root.type != bfd_link_hash_indirect)
+ return;
- /* If there are no references to this symbol that do not use the
- GOT, we don't need to generate a copy reloc. */
- if (!h->non_got_ref)
- return TRUE;
+ /* Copy over the GOT refcount entries that we may have already seen to
+ the symbol which just became indirect. */
+ edir->elf.got.refcount += eind->elf.got.refcount;
+ eind->elf.got.refcount = 0;
- if (ELIMINATE_COPY_RELOCS)
+ /* And plt entries. */
+ if (eind->elf.plt.plist != NULL)
{
- struct ppc_elf_dyn_relocs *p;
- for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+ if (edir->elf.plt.plist != NULL)
{
- s = p->sec->output_section;
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- break;
- }
+ struct plt_entry **entp;
+ struct plt_entry *ent;
- /* If we didn't find any dynamic relocs in read-only sections, then
- we'll be keeping the dynamic relocs and avoiding the copy reloc. */
- if (p == NULL)
- {
- h->non_got_ref = 0;
- return TRUE;
+ for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
+ {
+ struct plt_entry *dent;
+
+ for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
+ if (dent->sec == ent->sec && dent->addend == ent->addend)
+ {
+ dent->plt.refcount += ent->plt.refcount;
+ *entp = ent->next;
+ break;
+ }
+ if (dent == NULL)
+ entp = &ent->next;
+ }
+ *entp = edir->elf.plt.plist;
}
- }
- /* We must allocate the symbol in our .dynbss section, which will
- become part of the .bss section of the executable. There will be
- an entry for this symbol in the .dynsym section. The dynamic
- object will contain position independent code, so all references
- from the dynamic object to this symbol will go through the global
- offset table. The dynamic linker will use the .dynsym entry to
- determine the address it must put in the global offset table, so
- both the dynamic object and the regular object will refer to the
- same memory location for the variable.
+ edir->elf.plt.plist = eind->elf.plt.plist;
+ eind->elf.plt.plist = NULL;
+ }
- Of course, if the symbol is sufficiently small, we must instead
- allocate it in .sbss. FIXME: It would be better to do this if and
- only if there were actually SDAREL relocs for that symbol. */
+ if (eind->elf.dynindx != -1)
+ {
+ if (edir->elf.dynindx != -1)
+ _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
+ edir->elf.dynstr_index);
+ edir->elf.dynindx = eind->elf.dynindx;
+ edir->elf.dynstr_index = eind->elf.dynstr_index;
+ eind->elf.dynindx = -1;
+ eind->elf.dynstr_index = 0;
+ }
+}
- if (h->size <= elf_gp_size (htab->elf.dynobj))
- s = htab->dynsbss;
- else
- s = htab->dynbss;
- BFD_ASSERT (s != NULL);
+/* Return 1 if target is one of ours. */
- /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
- copy the initial value out of the dynamic object and into the
- runtime process image. We need to remember the offset into the
- .rela.bss section we are going to use. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
- {
- asection *srel;
+static bfd_boolean
+is_ppc_elf_target (const struct bfd_target *targ)
+{
+ extern const bfd_target bfd_elf32_powerpc_vec;
+ extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
+ extern const bfd_target bfd_elf32_powerpcle_vec;
- if (h->size <= elf_gp_size (htab->elf.dynobj))
- srel = htab->relsbss;
- else
- srel = htab->relbss;
- BFD_ASSERT (srel != NULL);
- srel->size += sizeof (Elf32_External_Rela);
- h->needs_copy = 1;
- }
+ return (targ == &bfd_elf32_powerpc_vec
+ || targ == &bfd_elf32_powerpc_vxworks_vec
+ || targ == &bfd_elf32_powerpcle_vec);
+}
- /* We need to figure out the alignment required for this symbol. I
- have no idea how ELF linkers handle this. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 4)
- power_of_two = 4;
+/* Hook called by the linker routine which adds symbols from an object
+ file. We use it to put .comm items in .sbss, and not .bss. */
- /* Apply the required alignment. */
- s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
- if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
+static bfd_boolean
+ppc_elf_add_symbol_hook (bfd *abfd,
+ struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp,
+ bfd_vma *valp)
+{
+ if (sym->st_shndx == SHN_COMMON
+ && !info->relocatable
+ && sym->st_size <= elf_gp_size (abfd)
+ && is_ppc_elf_target (info->hash->creator))
{
- if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
- return FALSE;
- }
+ /* Common symbols less than or equal to -G nn bytes are automatically
+ put into .sbss. */
+ struct ppc_elf_link_hash_table *htab;
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->size;
+ htab = ppc_elf_hash_table (info);
+ if (htab->sbss == NULL)
+ {
+ flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
- /* Increment the section size to make room for the symbol. */
- s->size += h->size;
+ if (!htab->elf.dynobj)
+ htab->elf.dynobj = abfd;
+
+ htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
+ ".sbss",
+ flags);
+ if (htab->sbss == NULL)
+ return FALSE;
+ }
+
+ *secp = htab->sbss;
+ *valp = sym->st_size;
+ }
return TRUE;
}
\f
-/* Of those relocs that might be copied as dynamic relocs, this macro
- selects those that must be copied when linking a shared library,
- even when the symbol is local. */
-
-#define MUST_BE_DYN_RELOC(RTYPE) \
- ((RTYPE) != R_PPC_REL24 \
- && (RTYPE) != R_PPC_REL14 \
- && (RTYPE) != R_PPC_REL14_BRTAKEN \
- && (RTYPE) != R_PPC_REL14_BRNTAKEN \
- && (RTYPE) != R_PPC_REL32)
+static bfd_boolean
+create_sdata_sym (struct ppc_elf_link_hash_table *htab,
+ elf_linker_section_t *lsect)
+{
+ lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
+ TRUE, FALSE, TRUE);
+ if (lsect->sym == NULL)
+ return FALSE;
+ if (lsect->sym->root.type == bfd_link_hash_new)
+ lsect->sym->non_elf = 0;
+ lsect->sym->ref_regular = 1;
+ return TRUE;
+}
-/* Allocate space in associated reloc sections for dynamic relocs. */
+/* Create a special linker section. */
static bfd_boolean
-allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
+ppc_elf_create_linker_section (bfd *abfd,
+ struct bfd_link_info *info,
+ flagword flags,
+ elf_linker_section_t *lsect)
{
- struct bfd_link_info *info = inf;
- struct ppc_elf_link_hash_entry *eh;
- struct ppc_elf_link_hash_table *htab;
- struct ppc_elf_dyn_relocs *p;
-
- if (h->root.type == bfd_link_hash_indirect)
- return TRUE;
+ struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
+ asection *s;
- if (h->root.type == bfd_link_hash_warning)
- /* When warning symbols are created, they **replace** the "real"
- entry in the hash table, thus we never get to see the real
- symbol in a hash traversal. So look at it now. */
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
- htab = ppc_elf_hash_table (info);
- if (htab->elf.dynamic_sections_created
- && h->plt.refcount > 0)
- {
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ /* Record the first bfd that needs the special sections. */
+ if (!htab->elf.dynobj)
+ htab->elf.dynobj = abfd;
- if (info->shared
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
- {
- asection *s = htab->plt;
-
- /* If this is the first .plt entry, make room for the special
- first entry. */
- if (s->size == 0)
- s->size += PLT_INITIAL_ENTRY_SIZE;
-
- /* The PowerPC PLT is actually composed of two parts, the
- first part is 2 words (for a load and a jump), and then
- there is a remaining word available at the end. */
- h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
- + (PLT_SLOT_SIZE
- * ((s->size - PLT_INITIAL_ENTRY_SIZE)
- / PLT_ENTRY_SIZE)));
-
- /* If this symbol is not defined in a regular file, and we
- are not generating a shared library, then set the symbol
- to this location in the .plt. This is required to make
- function pointers compare as equal between the normal
- executable and the shared library. */
- if (! info->shared
- && !h->def_regular)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
- }
+ s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
+ lsect->name,
+ flags);
+ if (s == NULL
+ || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
+ return FALSE;
+ lsect->section = s;
- /* Make room for this entry. After the 8192nd entry, room
- for two entries is allocated. */
- s->size += PLT_ENTRY_SIZE;
- if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
- > PLT_NUM_SINGLE_ENTRIES)
- s->size += PLT_ENTRY_SIZE;
+ return create_sdata_sym (htab, lsect);
+}
- /* We also need to make an entry in the .rela.plt section. */
- htab->relplt->size += sizeof (Elf32_External_Rela);
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
+/* Find a linker generated pointer with a given addend and type. */
- eh = (struct ppc_elf_link_hash_entry *) h;
- if (eh->elf.got.refcount > 0)
- {
- /* Make sure this symbol is output as a dynamic symbol. */
- if (eh->elf.dynindx == -1
- && !eh->elf.forced_local)
- {
- if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
- return FALSE;
- }
+static elf_linker_section_pointers_t *
+elf_find_pointer_linker_section
+ (elf_linker_section_pointers_t *linker_pointers,
+ bfd_vma addend,
+ elf_linker_section_t *lsect)
+{
+ for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
+ if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
+ return linker_pointers;
- if (eh->tls_mask == (TLS_TLS | TLS_LD)
- && !eh->elf.def_dynamic)
- /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
- eh->elf.got.offset = (bfd_vma) -1;
- else
- {
- bfd_boolean dyn;
- eh->elf.got.offset = htab->got->size;
- if ((eh->tls_mask & TLS_TLS) != 0)
- {
- if ((eh->tls_mask & TLS_LD) != 0)
- htab->got->size += 8;
- if ((eh->tls_mask & TLS_GD) != 0)
- htab->got->size += 8;
- if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
- htab->got->size += 4;
- if ((eh->tls_mask & TLS_DTPREL) != 0)
- htab->got->size += 4;
- }
- else
- htab->got->size += 4;
- dyn = htab->elf.dynamic_sections_created;
- if ((info->shared
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
- && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
- || eh->elf.root.type != bfd_link_hash_undefweak))
- {
- /* All the entries we allocated need relocs. */
- htab->relgot->size
- += ((htab->got->size - eh->elf.got.offset) / 4
- * sizeof (Elf32_External_Rela));
- /* Except LD only needs one. */
- if ((eh->tls_mask & TLS_LD) != 0)
- htab->relgot->size -= sizeof (Elf32_External_Rela);
- }
- }
- }
- else
- eh->elf.got.offset = (bfd_vma) -1;
+ return NULL;
+}
- if (eh->dyn_relocs == NULL)
- return TRUE;
+/* Allocate a pointer to live in a linker created section. */
- /* In the shared -Bsymbolic case, discard space allocated for
- dynamic pc-relative relocs against symbols which turn out to be
- defined in regular objects. For the normal shared case, discard
- space for relocs that have become local due to symbol visibility
- changes. */
+static bfd_boolean
+elf_create_pointer_linker_section (bfd *abfd,
+ elf_linker_section_t *lsect,
+ struct elf_link_hash_entry *h,
+ const Elf_Internal_Rela *rel)
+{
+ elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
+ elf_linker_section_pointers_t *linker_section_ptr;
+ unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
+ bfd_size_type amt;
- if (info->shared)
+ BFD_ASSERT (lsect != NULL);
+
+ /* Is this a global symbol? */
+ if (h != NULL)
{
- /* Relocs that use pc_count are those that appear on a call insn,
- or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
- generated via assembly. We want calls to protected symbols to
- resolve directly to the function rather than going via the plt.
- If people want function pointer comparisons to work as expected
- then they should avoid writing weird assembly. */
- if (SYMBOL_CALLS_LOCAL (info, h))
- {
- struct ppc_elf_dyn_relocs **pp;
+ struct ppc_elf_link_hash_entry *eh;
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
- {
- p->count -= p->pc_count;
- p->pc_count = 0;
- if (p->count == 0)
- *pp = p->next;
- else
- pp = &p->next;
- }
- }
+ /* Has this symbol already been allocated? If so, our work is done. */
+ eh = (struct ppc_elf_link_hash_entry *) h;
+ if (elf_find_pointer_linker_section (eh->linker_section_pointer,
+ rel->r_addend,
+ lsect))
+ return TRUE;
- /* Also discard relocs on undefined weak syms with non-default
- visibility. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak)
- eh->dyn_relocs = NULL;
-
- /* Make sure undefined weak symbols are output as a dynamic symbol
- in PIEs. */
- if (info->pie
- && eh->dyn_relocs != NULL
- && h->dynindx == -1
- && h->root.type == bfd_link_hash_undefweak
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ ptr_linker_section_ptr = &eh->linker_section_pointer;
}
- else if (ELIMINATE_COPY_RELOCS)
+ else
{
- /* For the non-shared case, discard space for relocs against
- symbols which turn out to need copy relocs or are not
- dynamic. */
+ /* Allocation of a pointer to a local symbol. */
+ elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
- if (!h->non_got_ref
- && h->def_dynamic
- && !h->def_regular)
+ /* Allocate a table to hold the local symbols if first time. */
+ if (!ptr)
{
- /* Make sure this symbol is output as a dynamic symbol.
- Undefined weak syms won't yet be marked as dynamic. */
- if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
- /* If that succeeded, we know we'll be keeping all the
- relocs. */
- if (h->dynindx != -1)
- goto keep;
+ amt = num_symbols;
+ amt *= sizeof (elf_linker_section_pointers_t *);
+ ptr = bfd_zalloc (abfd, amt);
+
+ if (!ptr)
+ return FALSE;
+
+ elf_local_ptr_offsets (abfd) = ptr;
}
- eh->dyn_relocs = NULL;
+ /* Has this symbol already been allocated? If so, our work is done. */
+ if (elf_find_pointer_linker_section (ptr[r_symndx],
+ rel->r_addend,
+ lsect))
+ return TRUE;
- keep: ;
+ ptr_linker_section_ptr = &ptr[r_symndx];
}
- /* Finally, allocate space. */
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
- {
- asection *sreloc = elf_section_data (p->sec)->sreloc;
- sreloc->size += p->count * sizeof (Elf32_External_Rela);
- }
+ /* Allocate space for a pointer in the linker section, and allocate
+ a new pointer record from internal memory. */
+ BFD_ASSERT (ptr_linker_section_ptr != NULL);
+ amt = sizeof (elf_linker_section_pointers_t);
+ linker_section_ptr = bfd_alloc (abfd, amt);
+
+ if (!linker_section_ptr)
+ return FALSE;
+
+ linker_section_ptr->next = *ptr_linker_section_ptr;
+ linker_section_ptr->addend = rel->r_addend;
+ linker_section_ptr->lsect = lsect;
+ *ptr_linker_section_ptr = linker_section_ptr;
+
+ linker_section_ptr->offset = lsect->section->size;
+ lsect->section->size += 4;
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
+ lsect->name, (long) linker_section_ptr->offset,
+ (long) lsect->section->size);
+#endif
return TRUE;
}
-/* Find any dynamic relocs that apply to read-only sections. */
-
static bfd_boolean
-readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
+update_local_sym_info (bfd *abfd,
+ Elf_Internal_Shdr *symtab_hdr,
+ unsigned long r_symndx,
+ int tls_type)
{
- struct ppc_elf_dyn_relocs *p;
+ bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
+ char *local_got_tls_masks;
- if (h->root.type == bfd_link_hash_indirect)
- return TRUE;
+ if (local_got_refcounts == NULL)
+ {
+ bfd_size_type size = symtab_hdr->sh_info;
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
+ local_got_refcounts = bfd_zalloc (abfd, size);
+ if (local_got_refcounts == NULL)
+ return FALSE;
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
+ }
- for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
- {
- asection *s = p->sec->output_section;
+ local_got_refcounts[r_symndx] += 1;
+ local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
+ local_got_tls_masks[r_symndx] |= tls_type;
+ return TRUE;
+}
- if (s != NULL
- && ((s->flags & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC)))
- {
- ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
+static bfd_boolean
+update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
+ asection *sec, bfd_vma addend)
+{
+ struct plt_entry *ent;
- /* Not an error, just cut short the traversal. */
- return FALSE;
- }
+ if (addend < 32768)
+ sec = NULL;
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->sec == sec && ent->addend == addend)
+ break;
+ if (ent == NULL)
+ {
+ bfd_size_type amt = sizeof (*ent);
+ ent = bfd_alloc (abfd, amt);
+ if (ent == NULL)
+ return FALSE;
+ ent->next = h->plt.plist;
+ ent->sec = sec;
+ ent->addend = addend;
+ ent->plt.refcount = 0;
+ h->plt.plist = ent;
}
+ ent->plt.refcount += 1;
return TRUE;
}
-/* Set the sizes of the dynamic sections. */
+static struct plt_entry *
+find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
+{
+ struct plt_entry *ent;
+
+ if (addend < 32768)
+ sec = NULL;
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->sec == sec && ent->addend == addend)
+ break;
+ return ent;
+}
+
+static void
+bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
+{
+ (*_bfd_error_handler)
+ (_("%B: relocation %s cannot be used when making a shared object"),
+ abfd,
+ ppc_elf_howto_table[r_type]->name);
+ bfd_set_error (bfd_error_bad_value);
+}
+
+/* Look through the relocs for a section during the first phase, and
+ allocate space in the global offset table or procedure linkage
+ table. */
static bfd_boolean
-ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info)
+ppc_elf_check_relocs (bfd *abfd,
+ struct bfd_link_info *info,
+ asection *sec,
+ const Elf_Internal_Rela *relocs)
{
struct ppc_elf_link_hash_table *htab;
- asection *s;
- bfd_boolean relocs;
- bfd *ibfd;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+ asection *got2, *sreloc;
+
+ if (info->relocatable)
+ return TRUE;
+
+ /* Don't do anything special with non-loaded, non-alloced sections.
+ In particular, any relocs in such sections should not affect GOT
+ and PLT reference counting (ie. we don't allow them to create GOT
+ or PLT entries), there's no possibility or desire to optimize TLS
+ relocs, and there's not much point in propagating relocs to shared
+ libs that the dynamic linker won't relocate. */
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
#ifdef DEBUG
- fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
+ _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
+ sec, abfd);
#endif
- htab = ppc_elf_hash_table (info);
- BFD_ASSERT (htab->elf.dynobj != NULL);
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (info->executable)
- {
- s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- }
- }
+ /* Initialize howto table if not already done. */
+ if (!ppc_elf_howto_table[R_PPC_ADDR32])
+ ppc_elf_howto_init ();
- if (htab->tlsld_got.refcount > 0)
- {
- htab->tlsld_got.offset = htab->got->size;
- htab->got->size += 8;
- if (info->shared)
- htab->relgot->size += sizeof (Elf32_External_Rela);
- }
- else
- htab->tlsld_got.offset = (bfd_vma) -1;
+ htab = ppc_elf_hash_table (info);
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ got2 = bfd_get_section_by_name (abfd, ".got2");
+ sreloc = NULL;
- /* Set up .got offsets for local syms, and space for local dynamic
- relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
{
- bfd_signed_vma *local_got;
- bfd_signed_vma *end_local_got;
- char *lgot_masks;
- bfd_size_type locsymcount;
- Elf_Internal_Shdr *symtab_hdr;
- asection *srel;
-
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
- continue;
+ unsigned long r_symndx;
+ enum elf_ppc_reloc_type r_type;
+ struct elf_link_hash_entry *h;
+ int tls_type = 0;
- for (s = ibfd->sections; s != NULL; s = s->next)
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
{
- struct ppc_elf_dyn_relocs *p;
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ }
- for (p = ((struct ppc_elf_dyn_relocs *)
- elf_section_data (s)->local_dynrel);
- p != NULL;
- p = p->next)
- {
- if (!bfd_is_abs_section (p->sec)
- && bfd_is_abs_section (p->sec->output_section))
- {
- /* Input section has been discarded, either because
- it is a copy of a linkonce section or due to
- linker script /DISCARD/, so we'll be discarding
- the relocs too. */
- }
- else if (p->count != 0)
- {
- elf_section_data (p->sec)->sreloc->size
- += p->count * sizeof (Elf32_External_Rela);
- if ((p->sec->output_section->flags
- & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC))
- info->flags |= DF_TEXTREL;
- }
- }
+ /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
+ This shows up in particular in an R_PPC_ADDR32 in the eabi
+ startup code. */
+ if (h != NULL
+ && htab->got == NULL
+ && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ {
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ if (!ppc_elf_create_got (htab->elf.dynobj, info))
+ return FALSE;
+ BFD_ASSERT (h == htab->elf.hgot);
}
- local_got = elf_local_got_refcounts (ibfd);
- if (!local_got)
- continue;
+ r_type = ELF32_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ case R_PPC_GOT_TLSLD16:
+ case R_PPC_GOT_TLSLD16_LO:
+ case R_PPC_GOT_TLSLD16_HI:
+ case R_PPC_GOT_TLSLD16_HA:
+ htab->tlsld_got.refcount += 1;
+ tls_type = TLS_TLS | TLS_LD;
+ goto dogottls;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- locsymcount = symtab_hdr->sh_info;
- end_local_got = local_got + locsymcount;
- lgot_masks = (char *) end_local_got;
- s = htab->got;
- srel = htab->relgot;
- for (; local_got < end_local_got; ++local_got, ++lgot_masks)
- if (*local_got > 0)
- {
- if (*lgot_masks == (TLS_TLS | TLS_LD))
- {
- /* If just an LD reloc, we'll just use
- htab->tlsld_got.offset. */
- if (htab->tlsld_got.offset == (bfd_vma) -1)
- {
- htab->tlsld_got.offset = s->size;
- s->size += 8;
- if (info->shared)
- srel->size += sizeof (Elf32_External_Rela);
- }
- *local_got = (bfd_vma) -1;
- }
- else
- {
- *local_got = s->size;
- if ((*lgot_masks & TLS_TLS) != 0)
- {
- if ((*lgot_masks & TLS_GD) != 0)
- s->size += 8;
- if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
- s->size += 4;
- if ((*lgot_masks & TLS_DTPREL) != 0)
- s->size += 4;
- }
- else
- s->size += 4;
- if (info->shared)
- srel->size += ((s->size - *local_got) / 4
- * sizeof (Elf32_External_Rela));
- }
- }
- else
- *local_got = (bfd_vma) -1;
- }
+ case R_PPC_GOT_TLSGD16:
+ case R_PPC_GOT_TLSGD16_LO:
+ case R_PPC_GOT_TLSGD16_HI:
+ case R_PPC_GOT_TLSGD16_HA:
+ tls_type = TLS_TLS | TLS_GD;
+ goto dogottls;
- /* Allocate space for global sym dynamic relocs. */
- elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
+ case R_PPC_GOT_TPREL16:
+ case R_PPC_GOT_TPREL16_LO:
+ case R_PPC_GOT_TPREL16_HI:
+ case R_PPC_GOT_TPREL16_HA:
+ if (info->shared)
+ info->flags |= DF_STATIC_TLS;
+ tls_type = TLS_TLS | TLS_TPREL;
+ goto dogottls;
- /* We've now determined the sizes of the various dynamic sections.
- Allocate memory for them. */
- relocs = FALSE;
- for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
- {
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
+ case R_PPC_GOT_DTPREL16:
+ case R_PPC_GOT_DTPREL16_LO:
+ case R_PPC_GOT_DTPREL16_HI:
+ case R_PPC_GOT_DTPREL16_HA:
+ tls_type = TLS_TLS | TLS_DTPREL;
+ dogottls:
+ sec->has_tls_reloc = 1;
+ /* Fall thru */
- if (s == htab->plt
- || s == htab->got
- || (htab->sdata != NULL && s == htab->sdata->section)
- || (htab->sdata2 != NULL && s == htab->sdata2->section))
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- }
- else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
- {
- if (s->size == 0)
+ /* GOT16 relocations */
+ case R_PPC_GOT16:
+ case R_PPC_GOT16_LO:
+ case R_PPC_GOT16_HI:
+ case R_PPC_GOT16_HA:
+ /* This symbol requires a global offset table entry. */
+ if (htab->got == NULL)
{
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rela.bss and
- .rela.plt. We must create both sections in
- create_dynamic_sections, because they must be created
- before the linker maps input sections to output
- sections. The linker does that before
- adjust_dynamic_symbol is called, and it is that
- function which decides whether anything needs to go
- into these sections. */
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ if (!ppc_elf_create_got (htab->elf.dynobj, info))
+ return FALSE;
}
- else
+ if (h != NULL)
{
- /* Remember whether there are any relocation sections. */
- relocs = TRUE;
-
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
+ h->got.refcount += 1;
+ ppc_elf_hash_entry (h)->tls_mask |= tls_type;
}
- }
- else
- {
- /* It's not one of our sections, so don't allocate space. */
- continue;
- }
-
- if (s->size == 0)
- {
- _bfd_strip_section_from_output (info, s);
- continue;
- }
-
- /* Allocate memory for the section contents. */
- s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
- if (s->contents == NULL)
- return FALSE;
- }
-
- if (htab->elf.dynamic_sections_created)
- {
- /* Add some entries to the .dynamic section. We fill in the
- values later, in ppc_elf_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
-#define add_dynamic_entry(TAG, VAL) \
- _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+ else
+ /* This is a global offset table entry for a local symbol. */
+ if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
+ return FALSE;
+ break;
- if (info->executable)
- {
- if (!add_dynamic_entry (DT_DEBUG, 0))
+ /* Indirect .sdata relocation. */
+ case R_PPC_EMB_SDAI16:
+ if (info->shared)
+ {
+ bad_shared_reloc (abfd, r_type);
+ return FALSE;
+ }
+ if (htab->sdata[0].section == NULL
+ && !ppc_elf_create_linker_section (abfd, info, 0,
+ &htab->sdata[0]))
return FALSE;
- }
-
- if (htab->plt != NULL && htab->plt->size != 0)
- {
- if (!add_dynamic_entry (DT_PLTGOT, 0)
- || !add_dynamic_entry (DT_PLTRELSZ, 0)
- || !add_dynamic_entry (DT_PLTREL, DT_RELA)
- || !add_dynamic_entry (DT_JMPREL, 0))
+ if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
+ h, rel))
return FALSE;
- }
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
+ break;
- if (relocs)
- {
- if (!add_dynamic_entry (DT_RELA, 0)
- || !add_dynamic_entry (DT_RELASZ, 0)
- || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
+ /* Indirect .sdata2 relocation. */
+ case R_PPC_EMB_SDA2I16:
+ if (info->shared)
+ {
+ bad_shared_reloc (abfd, r_type);
+ return FALSE;
+ }
+ if (htab->sdata[1].section == NULL
+ && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
+ &htab->sdata[1]))
return FALSE;
- }
-
- /* If any dynamic relocs apply to a read-only section, then we
- need a DT_TEXTREL entry. */
- if ((info->flags & DF_TEXTREL) == 0)
- elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
- info);
-
- if ((info->flags & DF_TEXTREL) != 0)
- {
- if (!add_dynamic_entry (DT_TEXTREL, 0))
+ if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
+ h, rel))
return FALSE;
- }
- }
-#undef add_dynamic_entry
-
- return TRUE;
-}
-\f
-static bfd_boolean
-update_local_sym_info (bfd *abfd,
- Elf_Internal_Shdr *symtab_hdr,
- unsigned long r_symndx,
- int tls_type)
-{
- bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
- char *local_got_tls_masks;
-
- if (local_got_refcounts == NULL)
- {
- bfd_size_type size = symtab_hdr->sh_info;
-
- size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
- local_got_refcounts = bfd_zalloc (abfd, size);
- if (local_got_refcounts == NULL)
- return FALSE;
- elf_local_got_refcounts (abfd) = local_got_refcounts;
- }
-
- local_got_refcounts[r_symndx] += 1;
- local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
- local_got_tls_masks[r_symndx] |= tls_type;
- return TRUE;
-}
-
-static void
-bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
-{
- (*_bfd_error_handler)
- (_("%B: relocation %s cannot be used when making a shared object"),
- abfd,
- ppc_elf_howto_table[r_type]->name);
- bfd_set_error (bfd_error_bad_value);
-}
-
-/* Look through the relocs for a section during the first phase, and
- allocate space in the global offset table or procedure linkage
- table. */
-
-static bfd_boolean
-ppc_elf_check_relocs (bfd *abfd,
- struct bfd_link_info *info,
- asection *sec,
- const Elf_Internal_Rela *relocs)
-{
- struct ppc_elf_link_hash_table *htab;
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
- asection *sreloc;
-
- if (info->relocatable)
- return TRUE;
-
-#ifdef DEBUG
- _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
- sec, abfd);
-#endif
-
- /* Initialize howto table if not already done. */
- if (!ppc_elf_howto_table[R_PPC_ADDR32])
- ppc_elf_howto_init ();
-
- /* Create the linker generated sections all the time so that the
- special symbols are created. */
- htab = ppc_elf_hash_table (info);
- if (htab->sdata == NULL)
- {
- htab->sdata = ppc_elf_create_linker_section (abfd, info,
- LINKER_SECTION_SDATA);
- if (htab->sdata == NULL)
- return FALSE;
- }
-
- if (htab->sdata2 == NULL)
- {
- htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
- LINKER_SECTION_SDATA2);
- if (htab->sdata2 == NULL)
- return FALSE;
- }
-
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (abfd);
- sreloc = NULL;
-
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- unsigned long r_symndx;
- enum elf_ppc_reloc_type r_type;
- struct elf_link_hash_entry *h;
- int tls_type = 0;
-
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
-
- /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
- This shows up in particular in an R_PPC_ADDR32 in the eabi
- startup code. */
- if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
- {
- if (htab->got == NULL)
+ if (h != NULL)
{
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
- if (!ppc_elf_create_got (htab->elf.dynobj, info))
- return FALSE;
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
}
- }
-
- r_type = ELF32_R_TYPE (rel->r_info);
- switch (r_type)
- {
- case R_PPC_GOT_TLSLD16:
- case R_PPC_GOT_TLSLD16_LO:
- case R_PPC_GOT_TLSLD16_HI:
- case R_PPC_GOT_TLSLD16_HA:
- htab->tlsld_got.refcount += 1;
- tls_type = TLS_TLS | TLS_LD;
- goto dogottls;
-
- case R_PPC_GOT_TLSGD16:
- case R_PPC_GOT_TLSGD16_LO:
- case R_PPC_GOT_TLSGD16_HI:
- case R_PPC_GOT_TLSGD16_HA:
- tls_type = TLS_TLS | TLS_GD;
- goto dogottls;
+ break;
- case R_PPC_GOT_TPREL16:
- case R_PPC_GOT_TPREL16_LO:
- case R_PPC_GOT_TPREL16_HI:
- case R_PPC_GOT_TPREL16_HA:
+ case R_PPC_SDAREL16:
if (info->shared)
- info->flags |= DF_STATIC_TLS;
- tls_type = TLS_TLS | TLS_TPREL;
- goto dogottls;
-
- case R_PPC_GOT_DTPREL16:
- case R_PPC_GOT_DTPREL16_LO:
- case R_PPC_GOT_DTPREL16_HI:
- case R_PPC_GOT_DTPREL16_HA:
- tls_type = TLS_TLS | TLS_DTPREL;
- dogottls:
- sec->has_tls_reloc = 1;
- /* Fall thru */
-
- /* GOT16 relocations */
- case R_PPC_GOT16:
- case R_PPC_GOT16_LO:
- case R_PPC_GOT16_HI:
- case R_PPC_GOT16_HA:
- /* This symbol requires a global offset table entry. */
- if (htab->got == NULL)
{
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
- if (!ppc_elf_create_got (htab->elf.dynobj, info))
- return FALSE;
+ bad_shared_reloc (abfd, r_type);
+ return FALSE;
}
+ if (htab->sdata[0].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[0]))
+ return FALSE;
if (h != NULL)
{
- h->got.refcount += 1;
- ppc_elf_hash_entry (h)->tls_mask |= tls_type;
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
}
- else
- /* This is a global offset table entry for a local symbol. */
- if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
- return FALSE;
break;
- /* Indirect .sdata relocation. */
- case R_PPC_EMB_SDAI16:
+ case R_PPC_EMB_SDA2REL:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
- if (!elf_create_pointer_linker_section (abfd, info,
- htab->sdata, h, rel))
+ if (htab->sdata[1].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[1]))
return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
break;
- /* Indirect .sdata2 relocation. */
- case R_PPC_EMB_SDA2I16:
+ case R_PPC_EMB_SDA21:
+ case R_PPC_EMB_RELSDA:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
- if (!elf_create_pointer_linker_section (abfd, info,
- htab->sdata2, h, rel))
+ if (htab->sdata[0].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[0]))
+ return FALSE;
+ if (htab->sdata[1].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[1]))
return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
break;
- case R_PPC_SDAREL16:
- case R_PPC_EMB_SDA2REL:
- case R_PPC_EMB_SDA21:
- case R_PPC_EMB_RELSDA:
case R_PPC_EMB_NADDR32:
case R_PPC_EMB_NADDR16:
case R_PPC_EMB_NADDR16_LO:
bad_shared_reloc (abfd, r_type);
return FALSE;
}
+ if (h != NULL)
+ h->non_got_ref = TRUE;
break;
case R_PPC_PLT32:
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
+ else
+ {
+ bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
- h->needs_plt = 1;
- h->plt.refcount++;
+ h->needs_plt = 1;
+ if (!update_plt_info (abfd, h, got2, addend))
+ return FALSE;
+ }
break;
/* The following relocations don't need to propagate the
case R_PPC_TOC16:
break;
- /* This are just markers. */
+ case R_PPC_REL16:
+ case R_PPC_REL16_LO:
+ case R_PPC_REL16_HI:
+ case R_PPC_REL16_HA:
+ htab->can_use_new_plt = 1;
+ break;
+
+ /* These are just markers. */
case R_PPC_TLS:
case R_PPC_EMB_MRKREF:
case R_PPC_NONE:
/* This refers only to functions defined in the shared library. */
case R_PPC_LOCAL24PC:
+ if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
+ htab->plt_type = PLT_OLD;
break;
/* This relocation describes the C++ object vtable hierarchy.
info->flags |= DF_STATIC_TLS;
goto dodyn;
- /* When creating a shared object, we must copy these
- relocs into the output file. We create a reloc
- section in dynobj and make room for the reloc. */
+ case R_PPC_REL32:
+ if (h == NULL
+ && got2 != NULL
+ && (sec->flags & SEC_CODE) != 0
+ && (info->shared || info->pie)
+ && htab->plt_type == PLT_UNSET)
+ {
+ /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
+ the start of a function, which assembles to a REL32
+ reference to .got2. If we detect one of these, then
+ force the old PLT layout because the linker cannot
+ reliably deduce the GOT pointer value needed for
+ PLT call stubs. */
+ asection *s;
+
+ s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
+ r_symndx);
+ if (s == got2)
+ htab->plt_type = PLT_OLD;
+ }
+ if (h == NULL || h == htab->elf.hgot)
+ break;
+ goto dodyn1;
+
case R_PPC_REL24:
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
- case R_PPC_REL32:
- if (h == NULL
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ if (h == NULL)
break;
+ if (h == htab->elf.hgot)
+ {
+ if (htab->plt_type == PLT_UNSET)
+ htab->plt_type = PLT_OLD;
+ break;
+ }
/* fall through */
case R_PPC_ADDR32:
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
+ dodyn1:
if (h != NULL && !info->shared)
{
/* We may need a plt entry if the symbol turns out to be
a function defined in a dynamic object. */
- h->plt.refcount++;
+ if (!update_plt_info (abfd, h, NULL, 0))
+ return FALSE;
/* We may need a copy reloc too. */
h->non_got_ref = 1;
|| !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
- && (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
if (name == NULL)
return FALSE;
- BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+ BFD_ASSERT (CONST_STRNEQ (name, ".rela")
&& strcmp (bfd_get_section_name (abfd, sec),
name + 5) == 0);
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
if (sreloc == NULL)
{
flagword flags;
- sreloc = bfd_make_section (htab->elf.dynobj, name);
flags = (SEC_HAS_CONTENTS | SEC_READONLY
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- if ((sec->flags & SEC_ALLOC) != 0)
- flags |= SEC_ALLOC | SEC_LOAD;
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_ALLOC | SEC_LOAD);
+ sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
+ name,
+ flags);
if (sreloc == NULL
- || ! bfd_set_section_flags (htab->elf.dynobj,
- sreloc, flags)
|| ! bfd_set_section_alignment (htab->elf.dynobj,
sreloc, 2))
return FALSE;
easily. Oh well. */
asection *s;
+ void *vpp;
+
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (s == NULL)
return FALSE;
- head = ((struct ppc_elf_dyn_relocs **)
- &elf_section_data (s)->local_dynrel);
+ vpp = &elf_section_data (s)->local_dynrel;
+ head = (struct ppc_elf_dyn_relocs **) vpp;
}
p = *head;
return TRUE;
}
+\f
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
-/* Return the section that should be marked against GC for a given
- relocation. */
-
-static asection *
-ppc_elf_gc_mark_hook (asection *sec,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
+static bfd_boolean
+ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
- if (h != NULL)
- {
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_PPC_GNU_VTINHERIT:
- case R_PPC_GNU_VTENTRY:
- break;
+ flagword old_flags;
+ flagword new_flags;
+ bfd_boolean error;
- default:
- switch (h->root.type)
- {
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- return h->root.u.def.section;
+ if (!is_ppc_elf_target (ibfd->xvec)
+ || !is_ppc_elf_target (obfd->xvec))
+ return TRUE;
- case bfd_link_hash_common:
- return h->root.u.c.p->section;
+ /* Check if we have the same endianess. */
+ if (! _bfd_generic_verify_endian_match (ibfd, obfd))
+ return FALSE;
- default:
- break;
- }
- }
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+ if (!elf_flags_init (obfd))
+ {
+ /* First call, no flags set. */
+ elf_flags_init (obfd) = TRUE;
+ elf_elfheader (obfd)->e_flags = new_flags;
}
- else
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
- return NULL;
-}
+ /* Compatible flags are ok. */
+ else if (new_flags == old_flags)
+ ;
-/* Update the got, plt and dynamic reloc reference counts for the
+ /* Incompatible flags. */
+ else
+ {
+ /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
+ to be linked with either. */
+ error = FALSE;
+ if ((new_flags & EF_PPC_RELOCATABLE) != 0
+ && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%B: compiled with -mrelocatable and linked with "
+ "modules compiled normally"), ibfd);
+ }
+ else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
+ && (old_flags & EF_PPC_RELOCATABLE) != 0)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%B: compiled normally and linked with "
+ "modules compiled with -mrelocatable"), ibfd);
+ }
+
+ /* The output is -mrelocatable-lib iff both the input files are. */
+ if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
+ elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
+
+ /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
+ but each input file is either -mrelocatable or -mrelocatable-lib. */
+ if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
+ && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
+ && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
+ elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
+
+ /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
+ any module uses it. */
+ elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
+
+ new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+ old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+
+ /* Warn about any other mismatches. */
+ if (new_flags != old_flags)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%B: uses different e_flags (0x%lx) fields "
+ "than previous modules (0x%lx)"),
+ ibfd, (long) new_flags, (long) old_flags);
+ }
+
+ if (error)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+\f
+/* Choose which PLT scheme to use, and set .plt flags appropriately.
+ Returns -1 on error, 0 for old PLT, 1 for new PLT. */
+int
+ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info,
+ int force_old_plt,
+ int emit_stub_syms)
+{
+ struct ppc_elf_link_hash_table *htab;
+ flagword flags;
+
+ htab = ppc_elf_hash_table (info);
+
+ if (htab->plt_type == PLT_UNSET)
+ htab->plt_type = (force_old_plt || !htab->can_use_new_plt
+ ? PLT_OLD : PLT_NEW);
+
+ htab->emit_stub_syms = emit_stub_syms;
+
+ BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
+
+ if (htab->plt_type == PLT_NEW)
+ {
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+
+ /* The new PLT is a loaded section. */
+ if (htab->plt != NULL
+ && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
+ return -1;
+
+ /* The new GOT is not executable. */
+ if (htab->got != NULL
+ && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
+ return -1;
+ }
+ else
+ {
+ /* Stop an unused .glink section from affecting .text alignment. */
+ if (htab->glink != NULL
+ && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
+ return -1;
+ }
+ return htab->plt_type == PLT_NEW;
+}
+\f
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+ppc_elf_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
+{
+ if (h != NULL)
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_PPC_GNU_VTINHERIT:
+ case R_PPC_GNU_VTENTRY:
+ return NULL;
+ }
+
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
+}
+
+/* Update the got, plt and dynamic reloc reference counts for the
section being removed. */
static bfd_boolean
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
+ asection *got2;
+
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
elf_section_data (sec)->local_dynrel = NULL;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
+ got2 = bfd_get_section_by_name (abfd, ".got2");
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
struct ppc_elf_link_hash_entry *eh;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct ppc_elf_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
case R_PPC_REL32:
- if (h == NULL
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ if (h == NULL || h == htab->elf.hgot)
break;
/* Fall thru */
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
+ if (info->shared)
+ break;
+
case R_PPC_PLT32:
case R_PPC_PLTREL24:
+ case R_PPC_PLTREL32:
case R_PPC_PLT16_LO:
case R_PPC_PLT16_HI:
case R_PPC_PLT16_HA:
if (h != NULL)
{
- if (h->plt.refcount > 0)
- h->plt.refcount--;
+ bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
+ struct plt_entry *ent = find_plt_ent (h, got2, addend);
+ if (ent->plt.refcount > 0)
+ ent->plt.refcount -= 1;
}
break;
}
return TRUE;
}
-
+\f
/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
asection *
struct ppc_elf_link_hash_table *htab;
htab = ppc_elf_hash_table (info);
+ if (htab->plt_type == PLT_NEW
+ && htab->plt != NULL
+ && htab->plt->output_section != NULL)
+ {
+ elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
+ elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
+ }
+
htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
FALSE, FALSE, TRUE);
-
return _bfd_elf_tls_setup (obfd, info);
}
&& h != NULL
&& h == htab->tls_get_addr)
{
- if (h->plt.refcount > 0)
- h->plt.refcount -= 1;
+ struct plt_entry *ent = find_plt_ent (h, NULL, 0);
+ if (ent != NULL && ent->plt.refcount > 0)
+ ent->plt.refcount -= 1;
}
expecting_tls_get_addr = 0;
continue;
tls_mask = &lgot_masks[r_symndx];
}
- *tls_mask |= tls_set;
- *tls_mask &= ~tls_clear;
- }
+ *tls_mask |= tls_set;
+ *tls_mask &= ~tls_clear;
+ }
+
+ if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ }
+
+ if (locsyms != NULL
+ && (symtab_hdr->contents != (unsigned char *) locsyms))
+ {
+ if (!info->keep_memory)
+ free (locsyms);
+ else
+ symtab_hdr->contents = (unsigned char *) locsyms;
+ }
+ }
+ return TRUE;
+}
+\f
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. The current definition is in some section of the
+ dynamic object, but we're not including those sections. We have to
+ change the definition to something the rest of the link can
+ understand. */
+
+static bfd_boolean
+ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
+{
+ struct ppc_elf_link_hash_table *htab;
+ asection *s;
+ unsigned int power_of_two;
+
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
+ h->root.root.string);
+#endif
+
+ /* Make sure we know what is going on here. */
+ htab = ppc_elf_hash_table (info);
+ BFD_ASSERT (htab->elf.dynobj != NULL
+ && (h->needs_plt
+ || h->u.weakdef != NULL
+ || (h->def_dynamic
+ && h->ref_regular
+ && !h->def_regular)));
+
+ /* Deal with function syms. */
+ if (h->type == STT_FUNC
+ || h->needs_plt)
+ {
+ /* Clear procedure linkage table information for any symbol that
+ won't need a .plt entry. */
+ struct plt_entry *ent;
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->plt.refcount > 0)
+ break;
+ if (ent == NULL
+ || SYMBOL_CALLS_LOCAL (info, h)
+ || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak))
+ {
+ /* A PLT entry is not required/allowed when:
+
+ 1. We are not using ld.so; because then the PLT entry
+ can't be set up, so we can't use one. In this case,
+ ppc_elf_adjust_dynamic_symbol won't even be called.
+
+ 2. GC has rendered the entry unused.
+
+ 3. We know for certain that a call to this symbol
+ will go to this object, or will remain undefined. */
+ h->plt.plist = NULL;
+ h->needs_plt = 0;
+ }
+ return TRUE;
+ }
+ else
+ h->plt.plist = NULL;
+
+ /* If this is a weak symbol, and there is a real definition, the
+ processor independent code will have arranged for us to see the
+ real definition first, and we can just use the same value. */
+ if (h->u.weakdef != NULL)
+ {
+ BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
+ || h->u.weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->u.weakdef->root.u.def.section;
+ h->root.u.def.value = h->u.weakdef->root.u.def.value;
+ if (ELIMINATE_COPY_RELOCS)
+ h->non_got_ref = h->u.weakdef->non_got_ref;
+ return TRUE;
+ }
+
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. */
+
+ /* If we are creating a shared library, we must presume that the
+ only references to the symbol are via the global offset table.
+ For such cases we need not do anything here; the relocations will
+ be handled correctly by relocate_section. */
+ if (info->shared)
+ return TRUE;
+
+ /* If there are no references to this symbol that do not use the
+ GOT, we don't need to generate a copy reloc. */
+ if (!h->non_got_ref)
+ return TRUE;
+
+ /* If we didn't find any dynamic relocs in read-only sections, then we'll
+ be keeping the dynamic relocs and avoiding the copy reloc. We can't
+ do this if there are any small data relocations. */
+ if (ELIMINATE_COPY_RELOCS
+ && !ppc_elf_hash_entry (h)->has_sda_refs)
+ {
+ struct ppc_elf_dyn_relocs *p;
+ for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+ {
+ s = p->sec->output_section;
+ if (s != NULL && (s->flags & SEC_READONLY) != 0)
+ break;
+ }
+
+ if (p == NULL)
+ {
+ h->non_got_ref = 0;
+ return TRUE;
+ }
+ }
+
+ if (h->size == 0)
+ {
+ (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
+ h->root.root.string);
+ return TRUE;
+ }
+
+ /* We must allocate the symbol in our .dynbss section, which will
+ become part of the .bss section of the executable. There will be
+ an entry for this symbol in the .dynsym section. The dynamic
+ object will contain position independent code, so all references
+ from the dynamic object to this symbol will go through the global
+ offset table. The dynamic linker will use the .dynsym entry to
+ determine the address it must put in the global offset table, so
+ both the dynamic object and the regular object will refer to the
+ same memory location for the variable.
+
+ Of course, if the symbol is referenced using SDAREL relocs, we
+ must instead allocate it in .sbss. */
+
+ if (ppc_elf_hash_entry (h)->has_sda_refs)
+ s = htab->dynsbss;
+ else
+ s = htab->dynbss;
+ BFD_ASSERT (s != NULL);
+
+ /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
+ copy the initial value out of the dynamic object and into the
+ runtime process image. We need to remember the offset into the
+ .rela.bss section we are going to use. */
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ {
+ asection *srel;
+
+ if (ppc_elf_hash_entry (h)->has_sda_refs)
+ srel = htab->relsbss;
+ else
+ srel = htab->relbss;
+ BFD_ASSERT (srel != NULL);
+ srel->size += sizeof (Elf32_External_Rela);
+ h->needs_copy = 1;
+ }
+
+ /* We need to figure out the alignment required for this symbol. I
+ have no idea how ELF linkers handle this. */
+ power_of_two = bfd_log2 (h->size);
+ if (power_of_two > 4)
+ power_of_two = 4;
+
+ /* Apply the required alignment. */
+ s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
+ {
+ if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
+ return FALSE;
+ }
+
+ /* Define the symbol as being at this point in the section. */
+ h->root.u.def.section = s;
+ h->root.u.def.value = s->size;
+
+ /* Increment the section size to make room for the symbol. */
+ s->size += h->size;
+
+ return TRUE;
+}
+\f
+/* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
+ xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
+ specifying the addend on the plt relocation. For -fpic code, the sym
+ is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
+ xxxxxxxx.got2.plt_pic32.<callee>. */
+
+static bfd_boolean
+add_stub_sym (struct plt_entry *ent,
+ struct elf_link_hash_entry *h,
+ struct bfd_link_info *info)
+{
+ struct elf_link_hash_entry *sh;
+ size_t len1, len2, len3;
+ char *name;
+ const char *stub;
+ struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
+
+ if (info->shared || info->pie)
+ stub = ".plt_pic32.";
+ else
+ stub = ".plt_call32.";
+
+ len1 = strlen (h->root.root.string);
+ len2 = strlen (stub);
+ len3 = 0;
+ if (ent->sec)
+ len3 = strlen (ent->sec->name);
+ name = bfd_malloc (len1 + len2 + len3 + 9);
+ if (name == NULL)
+ return FALSE;
+ sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
+ if (ent->sec)
+ memcpy (name + 8, ent->sec->name, len3);
+ memcpy (name + 8 + len3, stub, len2);
+ memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
+ sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
+ if (sh == NULL)
+ return FALSE;
+ if (sh->root.type == bfd_link_hash_new)
+ {
+ sh->root.type = bfd_link_hash_defined;
+ sh->root.u.def.section = htab->glink;
+ sh->root.u.def.value = ent->glink_offset;
+ sh->ref_regular = 1;
+ sh->def_regular = 1;
+ sh->ref_regular_nonweak = 1;
+ sh->forced_local = 1;
+ sh->non_elf = 0;
+ }
+ return TRUE;
+}
+
+/* Allocate NEED contiguous space in .got, and return the offset.
+ Handles allocation of the got header when crossing 32k. */
+
+static bfd_vma
+allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
+{
+ bfd_vma where;
+ unsigned int max_before_header;
+
+ if (htab->plt_type == PLT_VXWORKS)
+ {
+ where = htab->got->size;
+ htab->got->size += need;
+ }
+ else
+ {
+ max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
+ if (need <= htab->got_gap)
+ {
+ where = max_before_header - htab->got_gap;
+ htab->got_gap -= need;
+ }
+ else
+ {
+ if (htab->got->size + need > max_before_header
+ && htab->got->size <= max_before_header)
+ {
+ htab->got_gap = max_before_header - htab->got->size;
+ htab->got->size = max_before_header + htab->got_header_size;
+ }
+ where = htab->got->size;
+ htab->got->size += need;
+ }
+ }
+ return where;
+}
+
+/* Allocate space in associated reloc sections for dynamic relocs. */
+
+static bfd_boolean
+allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
+{
+ struct bfd_link_info *info = inf;
+ struct ppc_elf_link_hash_entry *eh;
+ struct ppc_elf_link_hash_table *htab;
+ struct ppc_elf_dyn_relocs *p;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ /* When warning symbols are created, they **replace** the "real"
+ entry in the hash table, thus we never get to see the real
+ symbol in a hash traversal. So look at it now. */
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ htab = ppc_elf_hash_table (info);
+ if (htab->elf.dynamic_sections_created)
+ {
+ struct plt_entry *ent;
+ bfd_boolean doneone = FALSE;
+ bfd_vma plt_offset = 0, glink_offset = 0;
+
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->plt.refcount > 0)
+ {
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ if (info->shared
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
+ {
+ asection *s = htab->plt;
+
+ if (htab->plt_type == PLT_NEW)
+ {
+ if (!doneone)
+ {
+ plt_offset = s->size;
+ s->size += 4;
+ }
+ ent->plt.offset = plt_offset;
+
+ s = htab->glink;
+ if (!doneone || info->shared || info->pie)
+ {
+ glink_offset = s->size;
+ s->size += GLINK_ENTRY_SIZE;
+ }
+ if (!doneone
+ && !info->shared
+ && !h->def_regular)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = glink_offset;
+ }
+ ent->glink_offset = glink_offset;
+
+ if (htab->emit_stub_syms
+ && !add_stub_sym (ent, h, info))
+ return FALSE;
+ }
+ else
+ {
+ if (!doneone)
+ {
+ /* If this is the first .plt entry, make room
+ for the special first entry. */
+ if (s->size == 0)
+ s->size += htab->plt_initial_entry_size;
+
+ /* The PowerPC PLT is actually composed of two
+ parts, the first part is 2 words (for a load
+ and a jump), and then there is a remaining
+ word available at the end. */
+ plt_offset = (htab->plt_initial_entry_size
+ + (htab->plt_slot_size
+ * ((s->size
+ - htab->plt_initial_entry_size)
+ / htab->plt_entry_size)));
+
+ /* If this symbol is not defined in a regular
+ file, and we are not generating a shared
+ library, then set the symbol to this location
+ in the .plt. This is required to make
+ function pointers compare as equal between
+ the normal executable and the shared library. */
+ if (! info->shared
+ && !h->def_regular)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = plt_offset;
+ }
+
+ /* Make room for this entry. */
+ s->size += htab->plt_entry_size;
+ /* After the 8192nd entry, room for two entries
+ is allocated. */
+ if (htab->plt_type == PLT_OLD
+ && (s->size - htab->plt_initial_entry_size)
+ / htab->plt_entry_size
+ > PLT_NUM_SINGLE_ENTRIES)
+ s->size += htab->plt_entry_size;
+ }
+ ent->plt.offset = plt_offset;
+ }
+
+ /* We also need to make an entry in the .rela.plt section. */
+ if (!doneone)
+ {
+ htab->relplt->size += sizeof (Elf32_External_Rela);
+
+ if (htab->plt_type == PLT_VXWORKS)
+ {
+ /* Allocate space for the unloaded relocations. */
+ if (!info->shared)
+ {
+ if (ent->plt.offset
+ == (bfd_vma) htab->plt_initial_entry_size)
+ {
+ htab->srelplt2->size
+ += sizeof (Elf32_External_Rela)
+ * VXWORKS_PLTRESOLVE_RELOCS;
+ }
+
+ htab->srelplt2->size
+ += sizeof (Elf32_External_Rela)
+ * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
+ }
+
+ /* Every PLT entry has an associated GOT entry in
+ .got.plt. */
+ htab->sgotplt->size += 4;
+ }
+ doneone = TRUE;
+ }
+ }
+ else
+ ent->plt.offset = (bfd_vma) -1;
+
+ if (!doneone)
+ {
+ h->plt.plist = NULL;
+ h->needs_plt = 0;
+ }
+ }
+ }
+ else
+ {
+ h->plt.plist = NULL;
+ h->needs_plt = 0;
+ }
+
+ eh = (struct ppc_elf_link_hash_entry *) h;
+ if (eh->elf.got.refcount > 0)
+ {
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (eh->elf.dynindx == -1
+ && !eh->elf.forced_local)
+ {
+ if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
+ return FALSE;
+ }
+
+ if (eh->tls_mask == (TLS_TLS | TLS_LD)
+ && !eh->elf.def_dynamic)
+ /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
+ eh->elf.got.offset = (bfd_vma) -1;
+ else
+ {
+ bfd_boolean dyn;
+ unsigned int need = 0;
+ if ((eh->tls_mask & TLS_TLS) != 0)
+ {
+ if ((eh->tls_mask & TLS_LD) != 0)
+ need += 8;
+ if ((eh->tls_mask & TLS_GD) != 0)
+ need += 8;
+ if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
+ need += 4;
+ if ((eh->tls_mask & TLS_DTPREL) != 0)
+ need += 4;
+ }
+ else
+ need += 4;
+ eh->elf.got.offset = allocate_got (htab, need);
+ dyn = htab->elf.dynamic_sections_created;
+ if ((info->shared
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
+ && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
+ || eh->elf.root.type != bfd_link_hash_undefweak))
+ {
+ /* All the entries we allocated need relocs.
+ Except LD only needs one. */
+ if ((eh->tls_mask & TLS_LD) != 0)
+ need -= 4;
+ htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
+ }
+ }
+ }
+ else
+ eh->elf.got.offset = (bfd_vma) -1;
+
+ if (eh->dyn_relocs == NULL)
+ return TRUE;
+
+ /* In the shared -Bsymbolic case, discard space allocated for
+ dynamic pc-relative relocs against symbols which turn out to be
+ defined in regular objects. For the normal shared case, discard
+ space for relocs that have become local due to symbol visibility
+ changes. */
+
+ if (info->shared)
+ {
+ /* Relocs that use pc_count are those that appear on a call insn,
+ or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
+ generated via assembly. We want calls to protected symbols to
+ resolve directly to the function rather than going via the plt.
+ If people want function pointer comparisons to work as expected
+ then they should avoid writing weird assembly. */
+ if (SYMBOL_CALLS_LOCAL (info, h))
+ {
+ struct ppc_elf_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+
+ /* Also discard relocs on undefined weak syms with non-default
+ visibility. */
+ if (eh->dyn_relocs != NULL
+ && h->root.type == bfd_link_hash_undefweak)
+ {
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
+ eh->dyn_relocs = NULL;
+
+ /* Make sure undefined weak symbols are output as a dynamic
+ symbol in PIEs. */
+ else if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+ }
+ }
+ else if (ELIMINATE_COPY_RELOCS)
+ {
+ /* For the non-shared case, discard space for relocs against
+ symbols which turn out to need copy relocs or are not
+ dynamic. */
+
+ if (!h->non_got_ref
+ && h->def_dynamic
+ && !h->def_regular)
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ /* If that succeeded, we know we'll be keeping all the
+ relocs. */
+ if (h->dynindx != -1)
+ goto keep;
+ }
+
+ eh->dyn_relocs = NULL;
+
+ keep: ;
+ }
+
+ /* Finally, allocate space. */
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *sreloc = elf_section_data (p->sec)->sreloc;
+ sreloc->size += p->count * sizeof (Elf32_External_Rela);
+ }
+
+ return TRUE;
+}
+
+/* Find any dynamic relocs that apply to read-only sections. */
+
+static bfd_boolean
+readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
+{
+ struct ppc_elf_dyn_relocs *p;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *s = p->sec->output_section;
+
+ if (s != NULL
+ && ((s->flags & (SEC_READONLY | SEC_ALLOC))
+ == (SEC_READONLY | SEC_ALLOC)))
+ {
+ ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
+
+ /* Not an error, just cut short the traversal. */
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static bfd_boolean
+ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct ppc_elf_link_hash_table *htab;
+ asection *s;
+ bfd_boolean relocs;
+ bfd *ibfd;
+
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
+#endif
+
+ htab = ppc_elf_hash_table (info);
+ BFD_ASSERT (htab->elf.dynobj != NULL);
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Set the contents of the .interp section to the interpreter. */
+ if (info->executable)
+ {
+ s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
+ }
+
+ if (htab->plt_type == PLT_OLD)
+ htab->got_header_size = 16;
+ else if (htab->plt_type == PLT_NEW)
+ htab->got_header_size = 12;
+
+ /* Set up .got offsets for local syms, and space for local dynamic
+ relocs. */
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ bfd_signed_vma *local_got;
+ bfd_signed_vma *end_local_got;
+ char *lgot_masks;
+ bfd_size_type locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+
+ if (!is_ppc_elf_target (ibfd->xvec))
+ continue;
+
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ {
+ struct ppc_elf_dyn_relocs *p;
+
+ for (p = ((struct ppc_elf_dyn_relocs *)
+ elf_section_data (s)->local_dynrel);
+ p != NULL;
+ p = p->next)
+ {
+ if (!bfd_is_abs_section (p->sec)
+ && bfd_is_abs_section (p->sec->output_section))
+ {
+ /* Input section has been discarded, either because
+ it is a copy of a linkonce section or due to
+ linker script /DISCARD/, so we'll be discarding
+ the relocs too. */
+ }
+ else if (p->count != 0)
+ {
+ elf_section_data (p->sec)->sreloc->size
+ += p->count * sizeof (Elf32_External_Rela);
+ if ((p->sec->output_section->flags
+ & (SEC_READONLY | SEC_ALLOC))
+ == (SEC_READONLY | SEC_ALLOC))
+ info->flags |= DF_TEXTREL;
+ }
+ }
+ }
+
+ local_got = elf_local_got_refcounts (ibfd);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_info;
+ end_local_got = local_got + locsymcount;
+ lgot_masks = (char *) end_local_got;
+ for (; local_got < end_local_got; ++local_got, ++lgot_masks)
+ if (*local_got > 0)
+ {
+ if (*lgot_masks == (TLS_TLS | TLS_LD))
+ {
+ /* If just an LD reloc, we'll just use
+ htab->tlsld_got.offset. */
+ htab->tlsld_got.refcount += 1;
+ *local_got = (bfd_vma) -1;
+ }
+ else
+ {
+ unsigned int need = 0;
+ if ((*lgot_masks & TLS_TLS) != 0)
+ {
+ if ((*lgot_masks & TLS_GD) != 0)
+ need += 8;
+ if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
+ need += 4;
+ if ((*lgot_masks & TLS_DTPREL) != 0)
+ need += 4;
+ }
+ else
+ need += 4;
+ *local_got = allocate_got (htab, need);
+ if (info->shared)
+ htab->relgot->size += (need
+ * (sizeof (Elf32_External_Rela) / 4));
+ }
+ }
+ else
+ *local_got = (bfd_vma) -1;
+ }
+
+ if (htab->tlsld_got.refcount > 0)
+ {
+ htab->tlsld_got.offset = allocate_got (htab, 8);
+ if (info->shared)
+ htab->relgot->size += sizeof (Elf32_External_Rela);
+ }
+ else
+ htab->tlsld_got.offset = (bfd_vma) -1;
+
+ /* Allocate space for global sym dynamic relocs. */
+ elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
+
+ if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
+ {
+ unsigned int g_o_t = 32768;
+
+ /* If we haven't allocated the header, do so now. When we get here,
+ for old plt/got the got size will be 0 to 32764 (not allocated),
+ or 32780 to 65536 (header allocated). For new plt/got, the
+ corresponding ranges are 0 to 32768 and 32780 to 65536. */
+ if (htab->got->size <= 32768)
+ {
+ g_o_t = htab->got->size;
+ if (htab->plt_type == PLT_OLD)
+ g_o_t += 4;
+ htab->got->size += htab->got_header_size;
+ }
+
+ htab->elf.hgot->root.u.def.value = g_o_t;
+ }
+
+ if (htab->glink != NULL && htab->glink->size != 0)
+ {
+ htab->glink_pltresolve = htab->glink->size;
+ /* Space for the branch table. */
+ htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
+ /* Pad out to align the start of PLTresolve. */
+ htab->glink->size += -htab->glink->size & 15;
+ htab->glink->size += GLINK_PLTRESOLVE;
+
+ if (htab->emit_stub_syms)
+ {
+ struct elf_link_hash_entry *sh;
+ sh = elf_link_hash_lookup (&htab->elf, "__glink",
+ TRUE, FALSE, FALSE);
+ if (sh == NULL)
+ return FALSE;
+ if (sh->root.type == bfd_link_hash_new)
+ {
+ sh->root.type = bfd_link_hash_defined;
+ sh->root.u.def.section = htab->glink;
+ sh->root.u.def.value = htab->glink_pltresolve;
+ sh->ref_regular = 1;
+ sh->def_regular = 1;
+ sh->ref_regular_nonweak = 1;
+ sh->forced_local = 1;
+ sh->non_elf = 0;
+ }
+ sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
+ TRUE, FALSE, FALSE);
+ if (sh == NULL)
+ return FALSE;
+ if (sh->root.type == bfd_link_hash_new)
+ {
+ sh->root.type = bfd_link_hash_defined;
+ sh->root.u.def.section = htab->glink;
+ sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
+ sh->ref_regular = 1;
+ sh->def_regular = 1;
+ sh->ref_regular_nonweak = 1;
+ sh->forced_local = 1;
+ sh->non_elf = 0;
+ }
+ }
+ }
+
+ /* We've now determined the sizes of the various dynamic sections.
+ Allocate memory for them. */
+ relocs = FALSE;
+ for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
+ {
+ bfd_boolean strip_section = TRUE;
+
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
+ continue;
+
+ if (s == htab->plt
+ || s == htab->glink
+ || s == htab->got
+ || s == htab->sgotplt
+ || s == htab->sbss
+ || s == htab->dynbss
+ || s == htab->dynsbss)
+ {
+ /* We'd like to strip these sections if they aren't needed, but if
+ we've exported dynamic symbols from them we must leave them.
+ It's too late to tell BFD to get rid of the symbols. */
+ if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
+ strip_section = FALSE;
+ /* Strip this section if we don't need it; see the
+ comment below. */
+ }
+ else if (s == htab->sdata[0].section
+ || s == htab->sdata[1].section)
+ {
+ /* Strip these too. */
+ }
+ else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
+ {
+ if (s->size != 0)
+ {
+ /* Remember whether there are any relocation sections. */
+ relocs = TRUE;
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
+ }
+ }
+ else
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (s->size == 0 && strip_section)
+ {
+ /* If we don't need this section, strip it from the
+ output file. This is mostly to handle .rela.bss and
+ .rela.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ s->flags |= SEC_EXCLUDE;
+ continue;
+ }
+
+ if ((s->flags & SEC_HAS_CONTENTS) == 0)
+ continue;
+
+ /* Allocate memory for the section contents. */
+ s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
+
+ if (htab->elf.dynamic_sections_created)
+ {
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in ppc_elf_finish_dynamic_sections, but we
+ must add the entries now so that we get the correct size for
+ the .dynamic section. The DT_DEBUG entry is filled in by the
+ dynamic linker and used by the debugger. */
+#define add_dynamic_entry(TAG, VAL) \
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+
+ if (info->executable)
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
+
+ if (htab->plt != NULL && htab->plt->size != 0)
+ {
+ if (!add_dynamic_entry (DT_PLTGOT, 0)
+ || !add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+ || !add_dynamic_entry (DT_JMPREL, 0))
+ return FALSE;
+ }
+
+ if (htab->glink != NULL && htab->glink->size != 0)
+ {
+ if (!add_dynamic_entry (DT_PPC_GOT, 0))
+ return FALSE;
+ }
+
+ if (relocs)
+ {
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
+ return FALSE;
+ }
+
+ /* If any dynamic relocs apply to a read-only section, then we
+ need a DT_TEXTREL entry. */
+ if ((info->flags & DF_TEXTREL) == 0)
+ elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
+ info);
+
+ if ((info->flags & DF_TEXTREL) != 0)
+ {
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
+ }
+ }
+#undef add_dynamic_entry
+
+ return TRUE;
+}
+\f
+#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
+
+static const int shared_stub_entry[] =
+ {
+ 0x7c0802a6, /* mflr 0 */
+ 0x429f0005, /* bcl 20, 31, .Lxxx */
+ 0x7d6802a6, /* mflr 11 */
+ 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
+ 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
+ 0x7c0803a6, /* mtlr 0 */
+ 0x7d6903a6, /* mtctr 11 */
+ 0x4e800420, /* bctr */
+ };
+
+static const int stub_entry[] =
+ {
+ 0x3d600000, /* lis 11,xxx@ha */
+ 0x396b0000, /* addi 11,11,xxx@l */
+ 0x7d6903a6, /* mtctr 11 */
+ 0x4e800420, /* bctr */
+ };
+
+static bfd_boolean
+ppc_elf_relax_section (bfd *abfd,
+ asection *isec,
+ struct bfd_link_info *link_info,
+ bfd_boolean *again)
+{
+ struct one_fixup
+ {
+ struct one_fixup *next;
+ asection *tsec;
+ bfd_vma toff;
+ bfd_vma trampoff;
+ };
+
+ Elf_Internal_Shdr *symtab_hdr;
+ bfd_byte *contents = NULL;
+ Elf_Internal_Sym *isymbuf = NULL;
+ Elf_Internal_Rela *internal_relocs = NULL;
+ Elf_Internal_Rela *irel, *irelend;
+ struct one_fixup *fixups = NULL;
+ bfd_boolean changed;
+ struct ppc_elf_link_hash_table *htab;
+ bfd_size_type trampoff;
+ asection *got2;
+
+ *again = FALSE;
+
+ /* Nothing to do if there are no relocations, and no need to do
+ anything with non-alloc sections. */
+ if ((isec->flags & SEC_ALLOC) == 0
+ || (isec->flags & SEC_RELOC) == 0
+ || isec->reloc_count == 0)
+ return TRUE;
+
+ trampoff = (isec->size + 3) & (bfd_vma) -4;
+ /* Space for a branch around any trampolines. */
+ trampoff += 4;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ /* Get a copy of the native relocations. */
+ internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
+ link_info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ htab = ppc_elf_hash_table (link_info);
+ got2 = bfd_get_section_by_name (abfd, ".got2");
+
+ irelend = internal_relocs + isec->reloc_count;
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ unsigned long r_type = ELF32_R_TYPE (irel->r_info);
+ bfd_vma symaddr, reladdr, toff, roff;
+ asection *tsec;
+ struct one_fixup *f;
+ size_t insn_offset = 0;
+ bfd_vma max_branch_offset, val;
+ bfd_byte *hit_addr;
+ unsigned long t0;
+ unsigned char sym_type;
+
+ switch (r_type)
+ {
+ case R_PPC_REL24:
+ case R_PPC_LOCAL24PC:
+ case R_PPC_PLTREL24:
+ max_branch_offset = 1 << 25;
+ break;
+
+ case R_PPC_REL14:
+ case R_PPC_REL14_BRTAKEN:
+ case R_PPC_REL14_BRNTAKEN:
+ max_branch_offset = 1 << 15;
+ break;
+
+ default:
+ continue;
+ }
+
+ /* Get the value of the symbol referred to by the reloc. */
+ if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+
+ /* Read this BFD's local symbols. */
+ if (isymbuf == NULL)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == 0)
+ goto error_return;
+ }
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ if (isym->st_shndx == SHN_UNDEF)
+ continue; /* We can't do anything with undefined symbols. */
+ else if (isym->st_shndx == SHN_ABS)
+ tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ tsec = bfd_com_section_ptr;
+ else
+ tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+
+ toff = isym->st_value;
+ sym_type = ELF_ST_TYPE (isym->st_info);
+ }
+ else
+ {
+ /* Global symbol handling. */
+ unsigned long indx;
+ struct elf_link_hash_entry *h;
+
+ indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
+ h = elf_sym_hashes (abfd)[indx];
+
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ tsec = NULL;
+ toff = 0;
+ if (r_type == R_PPC_PLTREL24
+ && htab->plt != NULL)
+ {
+ struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
+
+ if (ent != NULL)
+ {
+ if (htab->plt_type == PLT_NEW)
+ {
+ tsec = htab->glink;
+ toff = ent->glink_offset;
+ }
+ else
+ {
+ tsec = htab->plt;
+ toff = ent->plt.offset;
+ }
+ }
+ }
+ if (tsec != NULL)
+ ;
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ tsec = h->root.u.def.section;
+ toff = h->root.u.def.value;
+ }
+ else
+ continue;
+
+ sym_type = h->type;
+ }
+
+ /* If the branch and target are in the same section, you have
+ no hope of adding stubs. We'll error out later should the
+ branch overflow. */
+ if (tsec == isec)
+ continue;
+
+ /* There probably isn't any reason to handle symbols in
+ SEC_MERGE sections; SEC_MERGE doesn't seem a likely
+ attribute for a code section, and we are only looking at
+ branches. However, implement it correctly here as a
+ reference for other target relax_section functions. */
+ if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
+ {
+ /* At this stage in linking, no SEC_MERGE symbol has been
+ adjusted, so all references to such symbols need to be
+ passed through _bfd_merged_section_offset. (Later, in
+ relocate_section, all SEC_MERGE symbols *except* for
+ section symbols have been adjusted.)
+
+ gas may reduce relocations against symbols in SEC_MERGE
+ sections to a relocation against the section symbol when
+ the original addend was zero. When the reloc is against
+ a section symbol we should include the addend in the
+ offset passed to _bfd_merged_section_offset, since the
+ location of interest is the original symbol. On the
+ other hand, an access to "sym+addend" where "sym" is not
+ a section symbol should not include the addend; Such an
+ access is presumed to be an offset from "sym"; The
+ location of interest is just "sym". */
+ if (sym_type == STT_SECTION)
+ toff += irel->r_addend;
+
+ toff = _bfd_merged_section_offset (abfd, &tsec,
+ elf_section_data (tsec)->sec_info,
+ toff);
+
+ if (sym_type != STT_SECTION)
+ toff += irel->r_addend;
+ }
+ /* PLTREL24 addends are special. */
+ else if (r_type != R_PPC_PLTREL24)
+ toff += irel->r_addend;
+
+ /* Attempted -shared link of non-pic code loses. */
+ if (tsec->output_section == NULL)
+ continue;
+
+ symaddr = tsec->output_section->vma + tsec->output_offset + toff;
+
+ roff = irel->r_offset;
+ reladdr = isec->output_section->vma + isec->output_offset + roff;
+
+ /* If the branch is in range, no need to do anything. */
+ if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
+ continue;
+
+ /* Look for an existing fixup to this address. */
+ for (f = fixups; f ; f = f->next)
+ if (f->tsec == tsec && f->toff == toff)
+ break;
+
+ if (f == NULL)
+ {
+ size_t size;
+ unsigned long stub_rtype;
+
+ val = trampoff - roff;
+ if (val >= max_branch_offset)
+ /* Oh dear, we can't reach a trampoline. Don't try to add
+ one. We'll report an error later. */
+ continue;
+
+ if (link_info->shared)
+ {
+ size = 4 * ARRAY_SIZE (shared_stub_entry);
+ insn_offset = 12;
+ stub_rtype = R_PPC_RELAX32PC;
+ }
+ else
+ {
+ size = 4 * ARRAY_SIZE (stub_entry);
+ insn_offset = 0;
+ stub_rtype = R_PPC_RELAX32;
+ }
+
+ if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
+ != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
+ abort ();
+ if (tsec == htab->plt
+ || tsec == htab->glink)
+ stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
+
+ /* 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),
+ stub_rtype);
+ irel->r_offset = trampoff + insn_offset;
+
+ /* Record the fixup so we don't do it again this section. */
+ f = bfd_malloc (sizeof (*f));
+ f->next = fixups;
+ f->tsec = tsec;
+ f->toff = toff;
+ f->trampoff = trampoff;
+ fixups = f;
+
+ trampoff += size;
+ }
+ else
+ {
+ val = f->trampoff - roff;
+ if (val >= max_branch_offset)
+ continue;
- if (elf_section_data (sec)->relocs != relstart)
- free (relstart);
- }
+ /* Nop out the reloc, since we're finalizing things here. */
+ irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
+ }
- if (locsyms != NULL
- && (symtab_hdr->contents != (unsigned char *) locsyms))
+ /* Get the section contents. */
+ if (contents == NULL)
{
- if (!info->keep_memory)
- free (locsyms);
+ /* Get cached copy if it exists. */
+ if (elf_section_data (isec)->this_hdr.contents != NULL)
+ contents = elf_section_data (isec)->this_hdr.contents;
else
- symtab_hdr->contents = (unsigned char *) locsyms;
+ {
+ /* Go get them off disk. */
+ if (!bfd_malloc_and_get_section (abfd, isec, &contents))
+ goto error_return;
+ }
}
- }
- return TRUE;
-}
-\f
-/* Hook called by the linker routine which adds symbols from an object
- file. We use it to put .comm items in .sbss, and not .bss. */
-
-static bfd_boolean
-ppc_elf_add_symbol_hook (bfd *abfd,
- struct bfd_link_info *info,
- Elf_Internal_Sym *sym,
- const char **namep ATTRIBUTE_UNUSED,
- flagword *flagsp ATTRIBUTE_UNUSED,
- asection **secp,
- bfd_vma *valp)
-{
- if (sym->st_shndx == SHN_COMMON
- && !info->relocatable
- && sym->st_size <= elf_gp_size (abfd)
- && (info->hash->creator == abfd->xvec
- || info->hash->creator == abfd->xvec->alternative_target))
- {
- /* Common symbols less than or equal to -G nn bytes are automatically
- put into .sbss. */
- struct ppc_elf_link_hash_table *htab;
- htab = ppc_elf_hash_table (info);
- if (htab->sbss == NULL)
+ /* Fix up the existing branch to hit the trampoline. */
+ hit_addr = contents + roff;
+ switch (r_type)
{
- flagword flags = SEC_IS_COMMON;
+ case R_PPC_REL24:
+ 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;
- htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
- if (htab->sbss == NULL
- || ! bfd_set_section_flags (abfd, htab->sbss, flags))
- return FALSE;
+ case R_PPC_REL14:
+ case R_PPC_REL14_BRTAKEN:
+ case R_PPC_REL14_BRNTAKEN:
+ t0 = bfd_get_32 (abfd, hit_addr);
+ t0 &= ~0xfffc;
+ t0 |= val & 0xfffc;
+ bfd_put_32 (abfd, t0, hit_addr);
+ break;
}
-
- *secp = htab->sbss;
- *valp = sym->st_size;
}
- return TRUE;
-}
-\f
-/* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
-
-static bfd_boolean
-ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
- struct bfd_link_info *info,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
-{
- struct ppc_elf_link_hash_table *htab;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
- h->root.root.string);
-#endif
-
- htab = ppc_elf_hash_table (info);
- BFD_ASSERT (htab->elf.dynobj != NULL);
-
- if (h->plt.offset != (bfd_vma) -1)
+ /* Write out the trampolines. */
+ changed = fixups != NULL;
+ if (fixups != NULL)
{
- Elf_Internal_Rela rela;
- bfd_byte *loc;
- bfd_vma reloc_index;
-
-#ifdef DEBUG
- fprintf (stderr, ", plt_offset = %d", h->plt.offset);
-#endif
-
- /* This symbol has an entry in the procedure linkage table. Set
- it up. */
+ const int *stub;
+ bfd_byte *dest;
+ bfd_vma val;
+ int i, size;
- BFD_ASSERT (h->dynindx != -1);
- BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
+ do
+ {
+ struct one_fixup *f = fixups;
+ fixups = fixups->next;
+ free (f);
+ }
+ while (fixups);
- /* We don't need to fill in the .plt. The ppc dynamic linker
- will fill it in. */
+ contents = bfd_realloc (contents, trampoff);
+ if (contents == NULL)
+ goto error_return;
- /* Fill in the entry in the .rela.plt section. */
- rela.r_offset = (htab->plt->output_section->vma
- + htab->plt->output_offset
- + h->plt.offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
- rela.r_addend = 0;
+ isec->size = (isec->size + 3) & (bfd_vma) -4;
+ /* Branch around the trampolines. */
+ val = trampoff - isec->size + 0x48000000;
+ dest = contents + isec->size;
+ isec->size = trampoff;
+ bfd_put_32 (abfd, val, dest);
+ dest += 4;
- reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
- if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
- reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
- loc = (htab->relplt->contents
- + reloc_index * sizeof (Elf32_External_Rela));
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ if (link_info->shared)
+ {
+ stub = shared_stub_entry;
+ size = ARRAY_SIZE (shared_stub_entry);
+ }
+ else
+ {
+ stub = stub_entry;
+ size = ARRAY_SIZE (stub_entry);
+ }
- if (!h->def_regular)
+ i = 0;
+ while (dest < contents + trampoff)
{
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- /* If the symbol is weak, we do need to clear the value.
- Otherwise, the PLT entry would provide a definition for
- the symbol even if the symbol wasn't defined anywhere,
- and so the symbol would never be NULL. */
- if (!h->ref_regular_nonweak)
- sym->st_value = 0;
+ bfd_put_32 (abfd, stub[i], dest);
+ i++;
+ if (i == size)
+ i = 0;
+ dest += 4;
}
+ BFD_ASSERT (i == 0);
}
- if (h->needs_copy)
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
{
- asection *s;
- Elf_Internal_Rela rela;
- bfd_byte *loc;
-
- /* This symbols needs a copy reloc. Set it up. */
-
-#ifdef DEBUG
- fprintf (stderr, ", copy");
-#endif
-
- BFD_ASSERT (h->dynindx != -1);
-
- if (h->size <= elf_gp_size (htab->elf.dynobj))
- s = htab->relsbss;
+ if (! link_info->keep_memory)
+ free (isymbuf);
else
- s = htab->relbss;
- BFD_ASSERT (s != NULL);
-
- rela.r_offset = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
- rela.r_addend = 0;
- loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
}
-#ifdef DEBUG
- fprintf (stderr, "\n");
-#endif
+ if (contents != NULL
+ && elf_section_data (isec)->this_hdr.contents != contents)
+ {
+ if (!changed && !link_info->keep_memory)
+ free (contents);
+ else
+ {
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (isec)->this_hdr.contents = contents;
+ }
+ }
- /* Mark some specially defined symbols as absolute. */
- if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
- || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
- sym->st_shndx = SHN_ABS;
+ if (elf_section_data (isec)->relocs != internal_relocs)
+ {
+ if (!changed)
+ free (internal_relocs);
+ else
+ elf_section_data (isec)->relocs = internal_relocs;
+ }
+ *again = changed;
return TRUE;
+
+ error_return:
+ if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
+ free (isymbuf);
+ if (contents != NULL
+ && elf_section_data (isec)->this_hdr.contents != contents)
+ free (contents);
+ if (internal_relocs != NULL
+ && elf_section_data (isec)->relocs != internal_relocs)
+ free (internal_relocs);
+ return FALSE;
}
\f
-/* Finish up the dynamic sections. */
+/* What to do when ld finds relocations against symbols defined in
+ discarded sections. */
-static bfd_boolean
-ppc_elf_finish_dynamic_sections (bfd *output_bfd,
- struct bfd_link_info *info)
+static unsigned int
+ppc_elf_action_discarded (asection *sec)
{
- asection *sdyn;
- struct ppc_elf_link_hash_table *htab;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
-#endif
-
- htab = ppc_elf_hash_table (info);
- sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
-
- if (htab->elf.dynamic_sections_created)
- {
- Elf32_External_Dyn *dyncon, *dynconend;
-
- BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
-
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- asection *s;
+ if (strcmp (".fixup", sec->name) == 0)
+ return 0;
- bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
+ if (strcmp (".got2", sec->name) == 0)
+ return 0;
- switch (dyn.d_tag)
- {
- case DT_PLTGOT:
- s = htab->plt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- break;
+ return _bfd_elf_default_action_discarded (sec);
+}
+\f
+/* Fill in the address for a pointer generated in a linker section. */
- case DT_PLTRELSZ:
- dyn.d_un.d_val = htab->relplt->size;
- break;
+static bfd_vma
+elf_finish_pointer_linker_section (bfd *input_bfd,
+ elf_linker_section_t *lsect,
+ struct elf_link_hash_entry *h,
+ bfd_vma relocation,
+ const Elf_Internal_Rela *rel)
+{
+ elf_linker_section_pointers_t *linker_section_ptr;
- case DT_JMPREL:
- s = htab->relplt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- break;
+ BFD_ASSERT (lsect != NULL);
- default:
- continue;
- }
+ if (h != NULL)
+ {
+ /* Handle global symbol. */
+ struct ppc_elf_link_hash_entry *eh;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- }
+ eh = (struct ppc_elf_link_hash_entry *) h;
+ BFD_ASSERT (eh->elf.def_regular);
+ linker_section_ptr = eh->linker_section_pointer;
}
-
- /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
- easily find the address of the _GLOBAL_OFFSET_TABLE_. */
- if (htab->got)
+ else
{
- unsigned char *contents = htab->got->contents;
- bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
+ /* Handle local symbol. */
+ unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
- if (sdyn == NULL)
- bfd_put_32 (output_bfd, 0, contents + 4);
- else
- bfd_put_32 (output_bfd,
- sdyn->output_section->vma + sdyn->output_offset,
- contents + 4);
+ BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
+ linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
+ }
- elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
+ linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
+ rel->r_addend,
+ lsect);
+ BFD_ASSERT (linker_section_ptr != NULL);
+
+ /* Offset will always be a multiple of four, so use the bottom bit
+ as a "written" flag. */
+ if ((linker_section_ptr->offset & 1) == 0)
+ {
+ bfd_put_32 (lsect->section->owner,
+ relocation + linker_section_ptr->addend,
+ lsect->section->contents + linker_section_ptr->offset);
+ linker_section_ptr->offset += 1;
}
- return TRUE;
+ relocation = (lsect->section->output_offset
+ + linker_section_ptr->offset - 1
+ - 0x8000);
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
+ lsect->name, (long) relocation, (long) relocation);
+#endif
+
+ /* Subtract out the addend, because it will get added back in by the normal
+ processing. */
+ return relocation - linker_section_ptr->addend;
}
-\f
+
/* The RELOCATE_SECTION function is called by the ELF backend linker
to handle the relocations for a section.
Elf_Internal_Rela *relend;
Elf_Internal_Rela outrel;
bfd_byte *loc;
- asection *sreloc = NULL;
+ asection *got2, *sreloc = NULL;
bfd_vma *local_got_offsets;
bfd_boolean ret = TRUE;
+ bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
#ifdef DEBUG
_bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
(info->relocatable) ? " (relocatable)" : "");
#endif
- if (info->relocatable)
- return TRUE;
+ got2 = bfd_get_section_by_name (input_bfd, ".got2");
/* Initialize howto table if not already done. */
if (!ppc_elf_howto_table[R_PPC_ADDR32])
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
+ sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
sym_name = h->root.root.string;
}
+ if (sec != NULL && elf_discarded_section (sec))
+ {
+ /* For relocs against symbols from removed linkonce sections,
+ or sections discarded by a linker script, we just want the
+ section contents zeroed. Avoid any special processing. */
+ howto = NULL;
+ if (r_type < R_PPC_max)
+ howto = ppc_elf_howto_table[r_type];
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ rel->r_info = 0;
+ rel->r_addend = 0;
+ continue;
+ }
+
+ if (info->relocatable)
+ {
+ if (got2 != NULL
+ && r_type == R_PPC_PLTREL24
+ && rel->r_addend >= 32768)
+ {
+ /* R_PPC_PLTREL24 is rather special. If non-zero, the
+ addend specifies the GOT pointer offset within .got2. */
+ rel->r_addend += got2->output_offset;
+ }
+ continue;
+ }
+
/* TLS optimizations. Replace instruction sequences and relocs
based on information we collected in tls_optimize. We edit
RELOCS so that --emit-relocs will output something sensible
&& (tls_mask & TLS_TPREL) == 0)
{
bfd_vma insn;
- insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
+ insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
insn &= 31 << 21;
insn |= 0x3c020000; /* addis 0,2,0 */
- bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
r_type = R_PPC_TPREL16_HA;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
}
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
r_type = R_PPC_TPREL16_LO;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
+
/* Was PPC_TLS which sits on insn boundary, now
- PPC_TPREL16_LO which is at insn+2. */
- rel->r_offset += 2;
+ PPC_TPREL16_LO which is at low-order half-word. */
+ rel->r_offset += d_offset;
}
break;
else
{
bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
- rel->r_offset -= 2;
+ rel->r_offset -= d_offset;
r_type = R_PPC_NONE;
}
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
/* OK, it checks out. Replace the call. */
offset = rel[1].r_offset;
insn1 = bfd_get_32 (output_bfd,
- contents + rel->r_offset - 2);
+ contents + rel->r_offset - d_offset);
if ((tls_mask & tls_gd) != 0)
{
/* IE */
insn1 |= 32 << 26; /* lwz */
insn2 = 0x7c631214; /* add 3,3,2 */
rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
+ rel[1].r_addend = 0;
r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
+ R_PPC_GOT_TPREL16);
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
/* Was an LD reloc. */
r_symndx = 0;
rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
- rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
}
r_type = R_PPC_TPREL16_HA;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
rel[1].r_info = ELF32_R_INFO (r_symndx,
R_PPC_TPREL16_LO);
- rel[1].r_offset += 2;
+ rel[1].r_offset += d_offset;
+ rel[1].r_addend = rel->r_addend;
}
- bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
+ bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
bfd_put_32 (output_bfd, insn2, contents + offset);
if (tls_gd == 0)
{
}
}
- relocation = htab->got->output_offset + off - 4;
+ relocation = htab->got->output_offset + off;
+ relocation -= htab->elf.hgot->root.u.def.value;
/* Addends on got relocations don't make much sense.
x+off@got is actually x@got+off, and since the got is
addend = 0;
goto dodyn;
+ case R_PPC_REL16:
+ case R_PPC_REL16_LO:
+ case R_PPC_REL16_HI:
+ case R_PPC_REL16_HA:
+ break;
+
case R_PPC_REL24:
case R_PPC_REL32:
case R_PPC_REL14:
/* If these relocations are not to a named symbol, they can be
handled right here, no need to bother the dynamic linker. */
if (SYMBOL_REFERENCES_LOCAL (info, h)
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ || h == htab->elf.hgot)
break;
/* fall through */
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
- /* r_symndx will be zero only for relocs against symbols
- from removed linkonce sections, or sections discarded by
- a linker script. */
dodyn:
- if (r_symndx == 0)
+ if ((input_section->flags & SEC_ALLOC) == 0)
break;
/* Fall thru. */
|| !SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
- && (input_section->flags & SEC_ALLOC) != 0
&& h != NULL
&& h->dynindx != -1
&& !h->non_got_ref
if (name == NULL)
return FALSE;
- BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+ BFD_ASSERT (CONST_STRNEQ (name, ".rela")
&& strcmp (bfd_get_section_name (input_bfd,
input_section),
name + 5) == 0);
but ld.so expects buggy relocs. */
osec = sec->output_section;
indx = elf_section_data (osec)->dynindx;
- BFD_ASSERT (indx > 0);
+ if (indx == 0)
+ {
+ osec = htab->elf.text_index_section;
+ indx = elf_section_data (osec)->dynindx;
+ }
+ BFD_ASSERT (indx != 0);
#ifdef DEBUG
- if (indx <= 0)
- printf ("indx=%d section=%s flags=%08x name=%s\n",
+ if (indx == 0)
+ printf ("indx=%ld section=%s flags=%08x name=%s\n",
indx, osec->name, osec->flags,
h->root.root.string);
#endif
}
break;
+ case R_PPC_RELAX32PC_PLT:
+ case R_PPC_RELAX32_PLT:
+ {
+ struct plt_entry *ent = find_plt_ent (h, got2, addend);
+
+ if (htab->plt_type == PLT_NEW)
+ relocation = (htab->glink->output_section->vma
+ + htab->glink->output_offset
+ + ent->glink_offset);
+ else
+ relocation = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset);
+ addend = 0;
+ }
+ if (r_type == R_PPC_RELAX32_PLT)
+ goto relax32;
+ /* Fall thru */
+
case R_PPC_RELAX32PC:
relocation -= (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset - 4);
/* Fall thru */
+
case R_PPC_RELAX32:
+ relax32:
{
unsigned long t0;
unsigned long t1;
/* Indirect .sdata relocation. */
case R_PPC_EMB_SDAI16:
- BFD_ASSERT (htab->sdata != NULL);
+ BFD_ASSERT (htab->sdata[0].section != NULL);
relocation
- = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
- htab->sdata, h, relocation,
- rel, R_PPC_RELATIVE);
+ = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
+ h, relocation, rel);
break;
/* Indirect .sdata2 relocation. */
case R_PPC_EMB_SDA2I16:
- BFD_ASSERT (htab->sdata2 != NULL);
+ BFD_ASSERT (htab->sdata[1].section != NULL);
relocation
- = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
- htab->sdata2, h, relocation,
- rel, R_PPC_RELATIVE);
+ = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
+ h, relocation, rel);
break;
/* Handle the TOC16 reloc. We want to use the offset within the .got
case R_PPC_PLTREL24:
/* Relocation is to the entry for this symbol in the
procedure linkage table. */
- BFD_ASSERT (h != NULL);
+ {
+ struct plt_entry *ent = find_plt_ent (h, got2, addend);
- if (h->plt.offset == (bfd_vma) -1
- || htab->plt == NULL)
- {
- /* We didn't make a PLT entry for this symbol. This
- happens when statically linking PIC code, or when
- using -Bsymbolic. */
- break;
- }
+ addend = 0;
+ if (ent == NULL
+ || htab->plt == NULL)
+ {
+ /* We didn't make a PLT entry for this symbol. This
+ happens when statically linking PIC code, or when
+ using -Bsymbolic. */
+ break;
+ }
- unresolved_reloc = FALSE;
- relocation = (htab->plt->output_section->vma
- + htab->plt->output_offset
- + h->plt.offset);
+ unresolved_reloc = FALSE;
+ if (htab->plt_type == PLT_NEW)
+ relocation = (htab->glink->output_section->vma
+ + htab->glink->output_offset
+ + ent->glink_offset);
+ else
+ relocation = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset);
+ }
break;
/* Relocate against _SDA_BASE_. */
case R_PPC_SDAREL16:
{
const char *name;
- const struct elf_link_hash_entry *sh;
+ struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
- if (! ((strncmp (name, ".sdata", 6) == 0
+ if (! ((CONST_STRNEQ (name, ".sdata")
&& (name[6] == 0 || name[6] == '.'))
- || (strncmp (name, ".sbss", 5) == 0
+ || (CONST_STRNEQ (name, ".sbss")
&& (name[5] == 0 || name[5] == '.'))))
{
(*_bfd_error_handler)
howto->name,
name);
}
- sh = htab->sdata->sym_hash;
+ sh = htab->sdata[0].sym;
addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
break;
case R_PPC_EMB_SDA2REL:
{
const char *name;
- const struct elf_link_hash_entry *sh;
+ struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
- if (! (strncmp (name, ".sdata2", 7) == 0
- || strncmp (name, ".sbss2", 6) == 0))
+ if (! (CONST_STRNEQ (name, ".sdata2")
+ || CONST_STRNEQ (name, ".sbss2")))
{
(*_bfd_error_handler)
(_("%B: the target (%s) of a %s relocation is "
ret = FALSE;
continue;
}
- sh = htab->sdata2->sym_hash;
+ sh = htab->sdata[1].sym;
addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
break;
case R_PPC_EMB_RELSDA:
{
const char *name;
- const struct elf_link_hash_entry *sh;
int reg;
+ struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
- if (((strncmp (name, ".sdata", 6) == 0
+ if (((CONST_STRNEQ (name, ".sdata")
&& (name[6] == 0 || name[6] == '.'))
- || (strncmp (name, ".sbss", 5) == 0
+ || (CONST_STRNEQ (name, ".sbss")
&& (name[5] == 0 || name[5] == '.'))))
{
reg = 13;
- sh = htab->sdata->sym_hash;
+ sh = htab->sdata[0].sym;
addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
- else if (strncmp (name, ".sdata2", 7) == 0
- || strncmp (name, ".sbss2", 6) == 0)
+ else if (CONST_STRNEQ (name, ".sdata2")
+ || CONST_STRNEQ (name, ".sbss2"))
{
reg = 2;
- sh = htab->sdata2->sym_hash;
+ sh = htab->sdata[1].sym;
addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
else if (strcmp (name, ".PPC.EMB.sdata0") == 0
break;
case R_PPC_ADDR16_HA:
- case R_PPC_GOT16_HA:
- case R_PPC_PLT16_HA:
+ case R_PPC_REL16_HA:
case R_PPC_SECTOFF_HA:
case R_PPC_TPREL16_HA:
case R_PPC_DTPREL16_HA:
- case R_PPC_GOT_TLSGD16_HA:
- case R_PPC_GOT_TLSLD16_HA:
- case R_PPC_GOT_TPREL16_HA:
- case R_PPC_GOT_DTPREL16_HA:
case R_PPC_EMB_NADDR16_HA:
case R_PPC_EMB_RELST_HA:
/* It's just possible that this symbol is a weak symbol
that's not actually defined anywhere. In that case,
'sec' would be NULL, and we should leave the symbol
alone (it will be set to zero elsewhere in the link). */
- if (sec != NULL)
- /* Add 0x10000 if sign bit in 0:15 is set.
- Bits 0:15 are not used. */
- addend += 0x8000;
+ if (sec == NULL)
+ break;
+ /* Fall thru */
+
+ case R_PPC_PLT16_HA:
+ case R_PPC_GOT16_HA:
+ case R_PPC_GOT_TLSGD16_HA:
+ case R_PPC_GOT_TLSLD16_HA:
+ case R_PPC_GOT_TPREL16_HA:
+ case R_PPC_GOT_DTPREL16_HA:
+ /* Add 0x10000 if sign bit in 0:15 is set.
+ Bits 0:15 are not used. */
+ addend += 0x8000;
break;
}
r_symndx,
(long) rel->r_offset,
(long) addend);
-#endif
-
- if (unresolved_reloc
- && !((input_section->flags & SEC_DEBUGGING) != 0
- && h->def_dynamic))
- {
- (*_bfd_error_handler)
- (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
- input_bfd,
- input_section,
- (long) rel->r_offset,
- howto->name,
- sym_name);
- ret = FALSE;
- }
-
- r = _bfd_final_link_relocate (howto,
- input_bfd,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- addend);
-
- if (r != bfd_reloc_ok)
- {
- if (sym_name == NULL)
- sym_name = "(null)";
- if (r == bfd_reloc_overflow)
- {
- if (warned)
- continue;
- if (h != NULL
- && h->root.type == bfd_link_hash_undefweak
- && howto->pc_relative)
- {
- /* Assume this is a call protected by other code that
- detect the symbol is undefined. If this is the case,
- we can safely ignore the overflow. If not, the
- program is hosed anyway, and a little warning isn't
- going to help. */
-
- continue;
- }
-
- if (! (*info->callbacks->reloc_overflow) (info,
- (h ? &h->root : NULL),
- sym_name,
- howto->name,
- rel->r_addend,
- input_bfd,
- input_section,
- rel->r_offset))
- return FALSE;
- }
- else
- {
- (*_bfd_error_handler)
- (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
- input_bfd, input_section,
- (long) rel->r_offset, howto->name, sym_name, (int) r);
- ret = FALSE;
- }
- }
- }
-
-#ifdef DEBUG
- fprintf (stderr, "\n");
-#endif
-
- return ret;
-}
-
-static enum elf_reloc_type_class
-ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
-{
- switch (ELF32_R_TYPE (rela->r_info))
- {
- case R_PPC_RELATIVE:
- return reloc_class_relative;
- case R_PPC_REL24:
- case R_PPC_ADDR24:
- case R_PPC_JMP_SLOT:
- return reloc_class_plt;
- case R_PPC_COPY:
- return reloc_class_copy;
- default:
- return reloc_class_normal;
- }
-}
-\f
-/* Support for core dump NOTE sections. */
-
-static bfd_boolean
-ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
-{
- int offset;
- unsigned int size;
-
- switch (note->descsz)
- {
- default:
- return FALSE;
-
- case 268: /* Linux/PPC. */
- /* pr_cursig */
- elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
-
- /* pr_pid */
- elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
-
- /* pr_reg */
- offset = 72;
- size = 192;
-
- break;
- }
-
- /* Make a ".reg/999" section. */
- return _bfd_elfcore_make_pseudosection (abfd, ".reg",
- size, note->descpos + offset);
-}
-
-static bfd_boolean
-ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
-{
- switch (note->descsz)
- {
- default:
- return FALSE;
-
- case 128: /* Linux/PPC elf_prpsinfo. */
- elf_tdata (abfd)->core_program
- = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
- elf_tdata (abfd)->core_command
- = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
- }
-
- /* Note that for some reason, a spurious space is tacked
- onto the end of the args in some (at least one anyway)
- implementations, so strip it off if it exists. */
-
- {
- char *command = elf_tdata (abfd)->core_command;
- int n = strlen (command);
-
- if (0 < n && command[n - 1] == ' ')
- command[n - 1] = '\0';
- }
-
- return TRUE;
-}
-\f
-/* Very simple linked list structure for recording apuinfo values. */
-typedef struct apuinfo_list
-{
- struct apuinfo_list *next;
- unsigned long value;
-}
-apuinfo_list;
+#endif
-static apuinfo_list *head;
+ if (unresolved_reloc
+ && !((input_section->flags & SEC_DEBUGGING) != 0
+ && h->def_dynamic))
+ {
+ (*_bfd_error_handler)
+ (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
+ input_bfd,
+ input_section,
+ (long) rel->r_offset,
+ howto->name,
+ sym_name);
+ ret = FALSE;
+ }
+ r = _bfd_final_link_relocate (howto,
+ input_bfd,
+ input_section,
+ contents,
+ rel->r_offset,
+ relocation,
+ addend);
-static void
-apuinfo_list_init (void)
-{
- head = NULL;
-}
+ if (r != bfd_reloc_ok)
+ {
+ if (r == bfd_reloc_overflow)
+ {
+ if (warned)
+ continue;
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefweak
+ && howto->pc_relative)
+ {
+ /* Assume this is a call protected by other code that
+ detect the symbol is undefined. If this is the case,
+ we can safely ignore the overflow. If not, the
+ program is hosed anyway, and a little warning isn't
+ going to help. */
-static void
-apuinfo_list_add (unsigned long value)
-{
- apuinfo_list *entry = head;
+ continue;
+ }
- while (entry != NULL)
- {
- if (entry->value == value)
- return;
- entry = entry->next;
+ if (! (*info->callbacks->reloc_overflow) (info,
+ (h ? &h->root : NULL),
+ sym_name,
+ howto->name,
+ rel->r_addend,
+ input_bfd,
+ input_section,
+ rel->r_offset))
+ return FALSE;
+ }
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
+ input_bfd, input_section,
+ (long) rel->r_offset, howto->name, sym_name, (int) r);
+ ret = FALSE;
+ }
+ }
}
- entry = bfd_malloc (sizeof (* entry));
- if (entry == NULL)
- return;
+#ifdef DEBUG
+ fprintf (stderr, "\n");
+#endif
- entry->value = value;
- entry->next = head;
- head = entry;
+ return ret;
}
+\f
+#define PPC_LO(v) ((v) & 0xffff)
+#define PPC_HI(v) (((v) >> 16) & 0xffff)
+#define PPC_HA(v) PPC_HI ((v) + 0x8000)
-static unsigned
-apuinfo_list_length (void)
-{
- apuinfo_list *entry;
- unsigned long count;
-
- for (entry = head, count = 0;
- entry;
- entry = entry->next)
- ++ count;
-
- return count;
-}
+/* Finish up dynamic symbol handling. We set the contents of various
+ dynamic sections here. */
-static inline unsigned long
-apuinfo_list_element (unsigned long number)
+static bfd_boolean
+ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
+ struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
- apuinfo_list * entry;
+ struct ppc_elf_link_hash_table *htab;
+ struct plt_entry *ent;
+ bfd_boolean doneone;
- for (entry = head;
- entry && number --;
- entry = entry->next)
- ;
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
+ h->root.root.string);
+#endif
- return entry ? entry->value : 0;
-}
+ htab = ppc_elf_hash_table (info);
+ BFD_ASSERT (htab->elf.dynobj != NULL);
-static void
-apuinfo_list_finish (void)
-{
- apuinfo_list *entry;
+ doneone = FALSE;
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->plt.offset != (bfd_vma) -1)
+ {
+ if (!doneone)
+ {
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+ bfd_vma reloc_index;
- for (entry = head; entry;)
- {
- apuinfo_list *next = entry->next;
- free (entry);
- entry = next;
- }
+ if (htab->plt_type == PLT_NEW)
+ reloc_index = ent->plt.offset / 4;
+ else
+ {
+ reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
+ / htab->plt_slot_size);
+ if (reloc_index > PLT_NUM_SINGLE_ENTRIES
+ && htab->plt_type == PLT_OLD)
+ reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
+ }
- head = NULL;
-}
+ /* This symbol has an entry in the procedure linkage table.
+ Set it up. */
+ if (htab->plt_type == PLT_VXWORKS)
+ {
+ bfd_vma got_offset;
+ const bfd_vma *plt_entry;
+
+ /* The first three entries in .got.plt are reserved. */
+ got_offset = (reloc_index + 3) * 4;
-#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
-#define APUINFO_LABEL "APUinfo"
+ /* Use the right PLT. */
+ plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
+ : ppc_elf_vxworks_plt_entry;
-/* Scan the input BFDs and create a linked list of
- the APUinfo values that will need to be emitted. */
+ /* Fill in the .plt on VxWorks. */
+ if (info->shared)
+ {
+ bfd_vma got_offset_hi = (got_offset >> 16)
+ + ((got_offset & 0x8000) >> 15);
+
+ bfd_put_32 (output_bfd,
+ plt_entry[0] | (got_offset_hi & 0xffff),
+ htab->plt->contents + ent->plt.offset + 0);
+ bfd_put_32 (output_bfd,
+ plt_entry[1] | (got_offset & 0xffff),
+ htab->plt->contents + ent->plt.offset + 4);
+ }
+ else
+ {
+ bfd_vma got_loc
+ = (got_offset
+ + htab->elf.hgot->root.u.def.value
+ + htab->elf.hgot->root.u.def.section->output_offset
+ + htab->elf.hgot->root.u.def.section->output_section->vma);
+ bfd_vma got_loc_hi = (got_loc >> 16)
+ + ((got_loc & 0x8000) >> 15);
+
+ bfd_put_32 (output_bfd,
+ plt_entry[0] | (got_loc_hi & 0xffff),
+ htab->plt->contents + ent->plt.offset + 0);
+ bfd_put_32 (output_bfd,
+ plt_entry[1] | (got_loc & 0xffff),
+ htab->plt->contents + ent->plt.offset + 4);
+ }
-static void
-ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
-{
- bfd *ibfd;
- asection *asec;
- char *buffer;
- unsigned num_input_sections;
- bfd_size_type output_section_size;
- unsigned i;
- unsigned num_entries;
- unsigned long offset;
- unsigned long length;
- const char *error_message = NULL;
+ bfd_put_32 (output_bfd, plt_entry[2],
+ htab->plt->contents + ent->plt.offset + 8);
+ bfd_put_32 (output_bfd, plt_entry[3],
+ htab->plt->contents + ent->plt.offset + 12);
+
+ /* This instruction is an immediate load. The value loaded is
+ the byte offset of the R_PPC_JMP_SLOT relocation from the
+ start of the .rela.plt section. The value is stored in the
+ low-order 16 bits of the load instruction. */
+ /* NOTE: It appears that this is now an index rather than a
+ prescaled offset. */
+ bfd_put_32 (output_bfd,
+ plt_entry[4] | reloc_index,
+ htab->plt->contents + ent->plt.offset + 16);
+ /* This instruction is a PC-relative branch whose target is
+ the start of the PLT section. The address of this branch
+ instruction is 20 bytes beyond the start of this PLT entry.
+ The address is encoded in bits 6-29, inclusive. The value
+ stored is right-shifted by two bits, permitting a 26-bit
+ offset. */
+ bfd_put_32 (output_bfd,
+ (plt_entry[5]
+ | (-(ent->plt.offset + 20) & 0x03fffffc)),
+ htab->plt->contents + ent->plt.offset + 20);
+ bfd_put_32 (output_bfd, plt_entry[6],
+ htab->plt->contents + ent->plt.offset + 24);
+ bfd_put_32 (output_bfd, plt_entry[7],
+ htab->plt->contents + ent->plt.offset + 28);
+
+ /* Fill in the GOT entry corresponding to this PLT slot with
+ the address immediately after the the "bctr" instruction
+ in this PLT entry. */
+ bfd_put_32 (output_bfd, (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset + 16),
+ htab->sgotplt->contents + got_offset);
+
+ if (!info->shared)
+ {
+ /* Fill in a couple of entries in .rela.plt.unloaded. */
+ loc = htab->srelplt2->contents
+ + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
+ * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
+ * sizeof (Elf32_External_Rela));
+
+ /* Provide the @ha relocation for the first instruction. */
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset + 2);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
+ R_PPC_ADDR16_HA);
+ rela.r_addend = got_offset;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Provide the @l relocation for the second instruction. */
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset + 6);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
+ R_PPC_ADDR16_LO);
+ rela.r_addend = got_offset;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Provide a relocation for the GOT entry corresponding to this
+ PLT slot. Point it at the middle of the .plt entry. */
+ rela.r_offset = (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + got_offset);
+ rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
+ R_PPC_ADDR32);
+ rela.r_addend = ent->plt.offset + 16;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ }
- if (link_info == NULL)
- return;
+ /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
+ In particular, the offset for the relocation is not the
+ address of the PLT entry for this function, as specified
+ by the ABI. Instead, the offset is set to the address of
+ the GOT slot for this function. See EABI 4.4.4.1. */
+ rela.r_offset = (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + got_offset);
- /* Scan the input bfds, looking for apuinfo sections. */
- num_input_sections = 0;
- output_section_size = 0;
+ }
+ else
+ {
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset);
+ if (htab->plt_type == PLT_OLD)
+ {
+ /* We don't need to fill in the .plt. The ppc dynamic
+ linker will fill it in. */
+ }
+ else
+ {
+ bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
+ + htab->glink->output_section->vma
+ + htab->glink->output_offset);
+ bfd_put_32 (output_bfd, val,
+ htab->plt->contents + ent->plt.offset);
+ }
+ }
- for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
- {
- asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
- if (asec)
- {
- ++ num_input_sections;
- output_section_size += asec->size;
- }
- }
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
+ rela.r_addend = 0;
- /* We need at least one input sections
- in order to make merging worthwhile. */
- if (num_input_sections < 1)
- return;
+ loc = (htab->relplt->contents
+ + reloc_index * sizeof (Elf32_External_Rela));
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- /* Just make sure that the output section exists as well. */
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- return;
+ if (!h->def_regular)
+ {
+ /* Mark the symbol as undefined, rather than as defined in
+ the .plt section. Leave the value alone. */
+ sym->st_shndx = SHN_UNDEF;
+ /* If the symbol is weak, we do need to clear the value.
+ Otherwise, the PLT entry would provide a definition for
+ the symbol even if the symbol wasn't defined anywhere,
+ and so the symbol would never be NULL. */
+ if (!h->ref_regular_nonweak)
+ sym->st_value = 0;
+ }
+ doneone = TRUE;
+ }
- /* Allocate a buffer for the contents of the input sections. */
- buffer = bfd_malloc (output_section_size);
- if (buffer == NULL)
- return;
+ if (htab->plt_type == PLT_NEW)
+ {
+ bfd_vma plt;
+ unsigned char *p;
- offset = 0;
- apuinfo_list_init ();
+ plt = (ent->plt.offset
+ + htab->plt->output_section->vma
+ + htab->plt->output_offset);
+ p = (unsigned char *) htab->glink->contents + ent->glink_offset;
- /* Read in the input sections contents. */
- for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
- {
- unsigned long datum;
- char *ptr;
+ if (info->shared || info->pie)
+ {
+ bfd_vma got = 0;
- asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- continue;
+ if (ent->addend >= 32768)
+ got = (ent->addend
+ + ent->sec->output_section->vma
+ + ent->sec->output_offset);
+ else if (htab->elf.hgot != NULL)
+ got = (htab->elf.hgot->root.u.def.value
+ + htab->elf.hgot->root.u.def.section->output_section->vma
+ + htab->elf.hgot->root.u.def.section->output_offset);
- length = asec->size;
- if (length < 24)
- {
- error_message = _("corrupt or empty %s section in %B");
- goto fail;
- }
+ plt -= got;
- if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
- || (bfd_bread (buffer + offset, length, ibfd) != length))
- {
- error_message = _("unable to read in %s section from %B");
- goto fail;
- }
+ if (plt + 0x8000 < 0x10000)
+ {
+ bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
+ p += 4;
+ bfd_put_32 (output_bfd, MTCTR_11, p);
+ p += 4;
+ bfd_put_32 (output_bfd, BCTR, p);
+ p += 4;
+ bfd_put_32 (output_bfd, NOP, p);
+ p += 4;
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
+ p += 4;
+ bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
+ p += 4;
+ bfd_put_32 (output_bfd, MTCTR_11, p);
+ p += 4;
+ bfd_put_32 (output_bfd, BCTR, p);
+ p += 4;
+ }
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
+ p += 4;
+ bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
+ p += 4;
+ bfd_put_32 (output_bfd, MTCTR_11, p);
+ p += 4;
+ bfd_put_32 (output_bfd, BCTR, p);
+ p += 4;
+
+ /* We only need one non-PIC glink stub. */
+ break;
+ }
+ }
+ else
+ break;
+ }
- /* Process the contents of the section. */
- ptr = buffer + offset;
- error_message = _("corrupt %s section in %B");
+ if (h->needs_copy)
+ {
+ asection *s;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
- /* Verify the contents of the header. Note - we have to
- extract the values this way in order to allow for a
- host whose endian-ness is different from the target. */
- datum = bfd_get_32 (ibfd, ptr);
- if (datum != sizeof APUINFO_LABEL)
- goto fail;
+ /* This symbols needs a copy reloc. Set it up. */
- datum = bfd_get_32 (ibfd, ptr + 8);
- if (datum != 0x2)
- goto fail;
+#ifdef DEBUG
+ fprintf (stderr, ", copy");
+#endif
- if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
- goto fail;
+ BFD_ASSERT (h->dynindx != -1);
- /* Get the number of bytes used for apuinfo entries. */
- datum = bfd_get_32 (ibfd, ptr + 4);
- if (datum + 20 != length)
- goto fail;
+ if (ppc_elf_hash_entry (h)->has_sda_refs)
+ s = htab->relsbss;
+ else
+ s = htab->relbss;
+ BFD_ASSERT (s != NULL);
- /* Make sure that we do not run off the end of the section. */
- if (offset + length > output_section_size)
- goto fail;
+ rela.r_offset = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
+ rela.r_addend = 0;
+ loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ }
- /* Scan the apuinfo section, building a list of apuinfo numbers. */
- for (i = 0; i < datum; i += 4)
- apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
+#ifdef DEBUG
+ fprintf (stderr, "\n");
+#endif
- /* Update the offset. */
- offset += length;
+ /* Mark some specially defined symbols as absolute. */
+ if (strcmp (h->root.root.string, "_DYNAMIC") == 0
+ || (!htab->is_vxworks
+ && (h == htab->elf.hgot
+ || strcmp (h->root.root.string,
+ "_PROCEDURE_LINKAGE_TABLE_") == 0)))
+ sym->st_shndx = SHN_ABS;
+
+ return TRUE;
+}
+\f
+static enum elf_reloc_type_class
+ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
+{
+ switch (ELF32_R_TYPE (rela->r_info))
+ {
+ case R_PPC_RELATIVE:
+ return reloc_class_relative;
+ case R_PPC_REL24:
+ case R_PPC_ADDR24:
+ case R_PPC_JMP_SLOT:
+ return reloc_class_plt;
+ case R_PPC_COPY:
+ return reloc_class_copy;
+ default:
+ return reloc_class_normal;
}
+}
+\f
+/* Finish up the dynamic sections. */
- error_message = NULL;
+static bfd_boolean
+ppc_elf_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ asection *sdyn;
+ asection *splt;
+ struct ppc_elf_link_hash_table *htab;
+ bfd_vma got;
+ bfd * dynobj;
- /* Compute the size of the output section. */
- num_entries = apuinfo_list_length ();
- output_section_size = 20 + num_entries * 4;
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
+#endif
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+ htab = ppc_elf_hash_table (info);
+ dynobj = elf_hash_table (info)->dynobj;
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+ if (htab->is_vxworks)
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ else
+ splt = NULL;
- if (! bfd_set_section_size (abfd, asec, output_section_size))
- ibfd = abfd,
- error_message = _("warning: unable to set size of %s section in %B");
+ got = 0;
+ if (htab->elf.hgot != NULL)
+ got = (htab->elf.hgot->root.u.def.value
+ + htab->elf.hgot->root.u.def.section->output_section->vma
+ + htab->elf.hgot->root.u.def.section->output_offset);
- fail:
- free (buffer);
+ if (htab->elf.dynamic_sections_created)
+ {
+ Elf32_External_Dyn *dyncon, *dynconend;
- if (error_message)
- (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
-}
+ BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
+ dyncon = (Elf32_External_Dyn *) sdyn->contents;
+ dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+ asection *s;
-/* Prevent the output section from accumulating the input sections'
- contents. We have already stored this in our linked list structure. */
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
-static bfd_boolean
-ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
- asection *asec,
- bfd_byte *contents ATTRIBUTE_UNUSED)
-{
- return (apuinfo_list_length ()
- && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
-}
+ switch (dyn.d_tag)
+ {
+ case DT_PLTGOT:
+ if (htab->is_vxworks)
+ s = htab->sgotplt;
+ else
+ s = htab->plt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
+ break;
+ case DT_PLTRELSZ:
+ dyn.d_un.d_val = htab->relplt->size;
+ break;
-/* Finally we can generate the output section. */
+ case DT_JMPREL:
+ s = htab->relplt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
+ break;
-static void
-ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
-{
- bfd_byte *buffer;
- asection *asec;
- unsigned i;
- unsigned num_entries;
- bfd_size_type length;
+ case DT_PPC_GOT:
+ dyn.d_un.d_ptr = got;
+ break;
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- return;
+ case DT_RELASZ:
+ if (htab->is_vxworks)
+ {
+ if (htab->relplt)
+ dyn.d_un.d_ptr -= htab->relplt->size;
+ break;
+ }
+ continue;
- if (apuinfo_list_length () == 0)
- return;
+ default:
+ continue;
+ }
- length = asec->size;
- if (length < 20)
- return;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ }
+ }
- buffer = bfd_malloc (length);
- if (buffer == NULL)
+ /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
+ easily find the address of the _GLOBAL_OFFSET_TABLE_. */
+ if (htab->got != NULL)
{
- (*_bfd_error_handler)
- (_("failed to allocate space for new APUinfo section."));
- return;
- }
+ unsigned char *p = htab->got->contents;
+ bfd_vma val;
- /* Create the apuinfo header. */
- num_entries = apuinfo_list_length ();
- bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
- bfd_put_32 (abfd, num_entries * 4, buffer + 4);
- bfd_put_32 (abfd, 0x2, buffer + 8);
- strcpy (buffer + 12, APUINFO_LABEL);
+ p += htab->elf.hgot->root.u.def.value;
+ if (htab->plt_type == PLT_OLD)
+ bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
- length = 20;
- for (i = 0; i < num_entries; i++)
- {
- bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
- length += 4;
+ val = 0;
+ if (sdyn != NULL)
+ val = sdyn->output_section->vma + sdyn->output_offset;
+ bfd_put_32 (output_bfd, val, p);
+
+ elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
}
- if (length != asec->size)
- (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
+ /* Fill in the first entry in the VxWorks procedure linkage table. */
+ if (splt && splt->size > 0)
+ {
+ /* Use the right PLT. */
+ static const bfd_vma *plt_entry = NULL;
+ plt_entry = info->shared ?
+ ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
- if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
- (*_bfd_error_handler) (_("failed to install new APUinfo section."));
+ if (!info->shared)
+ {
+ bfd_vma got_value =
+ (htab->elf.hgot->root.u.def.section->output_section->vma
+ + htab->elf.hgot->root.u.def.section->output_offset
+ + htab->elf.hgot->root.u.def.value);
+ bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
+
+ bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
+ splt->contents + 0);
+ bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
+ splt->contents + 4);
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
+ bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
+ }
+ bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
+ bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
+ bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
+ bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
+ bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
+ bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
+
+ if (! info->shared)
+ {
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+
+ loc = htab->srelplt2->contents;
+
+ /* Output the @ha relocation for the first instruction. */
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + 2);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
+ rela.r_addend = 0;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Output the @l relocation for the second instruction. */
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + 6);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
+ rela.r_addend = 0;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ /* Fix up the remaining relocations. They may have the wrong
+ symbol index for _G_O_T_ or _P_L_T_ depending on the order
+ in which symbols were output. */
+ while (loc < htab->srelplt2->contents + htab->srelplt2->size)
+ {
+ Elf_Internal_Rela rel;
+
+ bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
+ bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
+ bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
+ loc += sizeof (Elf32_External_Rela);
+
+ bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
+ rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
+ bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
+ loc += sizeof (Elf32_External_Rela);
+ }
+ }
+ }
- free (buffer);
+ if (htab->glink != NULL && htab->glink->contents != NULL)
+ {
+ unsigned char *p;
+ unsigned char *endp;
+ bfd_vma res0;
+ unsigned int i;
+
+ /*
+ * PIC glink code is the following:
+ *
+ * # ith PLT code stub.
+ * addis 11,30,(plt+(i-1)*4-got)@ha
+ * lwz 11,(plt+(i-1)*4-got)@l(11)
+ * mtctr 11
+ * bctr
+ *
+ * # A table of branches, one for each plt entry.
+ * # The idea is that the plt call stub loads ctr (and r11) with these
+ * # addresses, so (r11 - res_0) gives the plt index * 4.
+ * res_0: b PLTresolve
+ * res_1: b PLTresolve
+ * .
+ * # Some number of entries towards the end can be nops
+ * res_n_m3: nop
+ * res_n_m2: nop
+ * res_n_m1:
+ *
+ * PLTresolve:
+ * addis 11,11,(1f-res_0)@ha
+ * mflr 0
+ * bcl 20,31,1f
+ * 1: addi 11,11,(1b-res_0)@l
+ * mflr 12
+ * mtlr 0
+ * sub 11,11,12 # r11 = index * 4
+ * addis 12,12,(got+4-1b)@ha
+ * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
+ * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
+ * mtctr 0
+ * add 0,11,11
+ * add 11,0,11 # r11 = index * 12 = reloc offset.
+ * bctr
+ */
+ static const unsigned int pic_plt_resolve[] =
+ {
+ ADDIS_11_11,
+ MFLR_0,
+ BCL_20_31,
+ ADDI_11_11,
+ MFLR_12,
+ MTLR_0,
+ SUB_11_11_12,
+ ADDIS_12_12,
+ LWZ_0_12,
+ LWZ_12_12,
+ MTCTR_0,
+ ADD_0_11_11,
+ ADD_11_0_11,
+ BCTR,
+ NOP,
+ NOP
+ };
+
+ static const unsigned int plt_resolve[] =
+ {
+ LIS_12,
+ ADDIS_11_11,
+ LWZ_0_12,
+ ADDI_11_11,
+ MTCTR_0,
+ ADD_0_11_11,
+ LWZ_12_12,
+ ADD_11_0_11,
+ BCTR,
+ NOP,
+ NOP,
+ NOP,
+ NOP,
+ NOP,
+ NOP,
+ NOP
+ };
+
+ if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
+ abort ();
+ if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
+ abort ();
- apuinfo_list_finish ();
-}
+ /* Build the branch table, one for each plt entry (less one),
+ and perhaps some padding. */
+ p = htab->glink->contents;
+ p += htab->glink_pltresolve;
+ endp = htab->glink->contents;
+ endp += htab->glink->size - GLINK_PLTRESOLVE;
+ while (p < endp - 8 * 4)
+ {
+ bfd_put_32 (output_bfd, B + endp - p, p);
+ p += 4;
+ }
+ while (p < endp)
+ {
+ bfd_put_32 (output_bfd, NOP, p);
+ p += 4;
+ }
-/* Return address for Ith PLT stub in section PLT, for relocation REL
- or (bfd_vma) -1 if it should not be included. */
+ res0 = (htab->glink_pltresolve
+ + htab->glink->output_section->vma
+ + htab->glink->output_offset);
-static bfd_vma
-ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
- const asection *plt ATTRIBUTE_UNUSED,
- const arelent *rel)
-{
- return rel->address;
-}
+ /* Last comes the PLTresolve stub. */
+ if (info->shared || info->pie)
+ {
+ bfd_vma bcl;
-/* Add extra PPC sections -- Note, for now, make .sbss2 and
- .PPC.EMB.sbss0 a normal section, and not a bss section so
- that the linker doesn't crater when trying to make more than
- 2 sections. */
+ for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
+ {
+ bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
+ p += 4;
+ }
+ p -= 4 * ARRAY_SIZE (pic_plt_resolve);
+
+ bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
+ + htab->glink->output_section->vma
+ + htab->glink->output_offset);
+
+ bfd_put_32 (output_bfd,
+ ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
+ bfd_put_32 (output_bfd,
+ ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
+ bfd_put_32 (output_bfd,
+ ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
+ if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
+ {
+ bfd_put_32 (output_bfd,
+ LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
+ bfd_put_32 (output_bfd,
+ LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
+ }
+ else
+ {
+ bfd_put_32 (output_bfd,
+ LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
+ bfd_put_32 (output_bfd,
+ LWZ_12_12 + 4, p + 9*4);
+ }
+ }
+ else
+ {
+ for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
+ {
+ bfd_put_32 (output_bfd, plt_resolve[i], p);
+ p += 4;
+ }
+ p -= 4 * ARRAY_SIZE (plt_resolve);
+
+ bfd_put_32 (output_bfd,
+ LIS_12 + PPC_HA (got + 4), p + 0*4);
+ bfd_put_32 (output_bfd,
+ ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
+ bfd_put_32 (output_bfd,
+ ADDI_11_11 + PPC_LO (-res0), p + 3*4);
+ if (PPC_HA (got + 4) == PPC_HA (got + 8))
+ {
+ bfd_put_32 (output_bfd,
+ LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
+ bfd_put_32 (output_bfd,
+ LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
+ }
+ else
+ {
+ bfd_put_32 (output_bfd,
+ LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
+ bfd_put_32 (output_bfd,
+ LWZ_12_12 + 4, p + 6*4);
+ }
+ }
+ }
-static struct bfd_elf_special_section const ppc_elf_special_sections[]=
-{
- { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
- { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
- { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
- { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
- { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
- { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
- { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
- { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
- { NULL, 0, 0, 0, 0 }
-};
+ return TRUE;
+}
\f
#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
#define TARGET_LITTLE_NAME "elf32-powerpcle"
#else
#define ELF_MAXPAGESIZE 0x10000
#endif
+#define ELF_MINPAGESIZE 0x1000
+#define ELF_COMMONPAGESIZE 0x1000
#define elf_info_to_howto ppc_elf_info_to_howto
#ifdef EM_CYGNUS_POWERPC
#endif
#define elf_backend_plt_not_loaded 1
-#define elf_backend_got_symbol_offset 4
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
-#define elf_backend_got_header_size 12
#define elf_backend_rela_normal 1
#define bfd_elf32_mkobject ppc_elf_mkobject
#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
#define elf_backend_grok_prstatus ppc_elf_grok_prstatus
#define elf_backend_grok_psinfo ppc_elf_grok_psinfo
+#define elf_backend_write_core_note ppc_elf_write_core_note
#define elf_backend_reloc_type_class ppc_elf_reloc_type_class
#define elf_backend_begin_write_processing ppc_elf_begin_write_processing
#define elf_backend_final_write_processing ppc_elf_final_write_processing
#define elf_backend_write_section ppc_elf_write_section
-#define elf_backend_special_sections ppc_elf_special_sections
+#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
#define elf_backend_plt_sym_val ppc_elf_plt_sym_val
+#define elf_backend_action_discarded ppc_elf_action_discarded
+#define elf_backend_init_index_section _bfd_elf_init_1_index_section
+
+#include "elf32-target.h"
+
+/* VxWorks Target */
+
+#undef TARGET_LITTLE_SYM
+#undef TARGET_LITTLE_NAME
+
+#undef TARGET_BIG_SYM
+#define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
+#undef TARGET_BIG_NAME
+#define TARGET_BIG_NAME "elf32-powerpc-vxworks"
+
+/* VxWorks uses the elf default section flags for .plt. */
+static const struct bfd_elf_special_section *
+ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
+{
+ if (sec->name == NULL)
+ return NULL;
+
+ if (strcmp (sec->name, ".plt") == 0)
+ return _bfd_elf_get_sec_type_attr (abfd, sec);
+
+ return ppc_elf_get_sec_type_attr (abfd, sec);
+}
+
+/* Like ppc_elf_link_hash_table_create, but overrides
+ appropriately for VxWorks. */
+static struct bfd_link_hash_table *
+ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
+{
+ struct bfd_link_hash_table *ret;
+
+ ret = ppc_elf_link_hash_table_create (abfd);
+ if (ret)
+ {
+ struct ppc_elf_link_hash_table *htab
+ = (struct ppc_elf_link_hash_table *)ret;
+ htab->is_vxworks = 1;
+ htab->plt_type = PLT_VXWORKS;
+ htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
+ htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
+ htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
+ }
+ return ret;
+}
+
+/* Tweak magic VxWorks symbols as they are loaded. */
+static bfd_boolean
+ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
+ struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp,
+ bfd_vma *valp)
+{
+ if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
+ valp))
+ return FALSE;
+
+ return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
+}
+
+static void
+ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
+{
+ ppc_elf_final_write_processing(abfd, linker);
+ elf_vxworks_final_write_processing(abfd, linker);
+}
+
+/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
+ define it. */
+#undef elf_backend_want_plt_sym
+#define elf_backend_want_plt_sym 1
+#undef elf_backend_want_got_plt
+#define elf_backend_want_got_plt 1
+#undef elf_backend_got_symbol_offset
+#define elf_backend_got_symbol_offset 0
+#undef elf_backend_plt_not_loaded
+#define elf_backend_plt_not_loaded 0
+#undef elf_backend_plt_readonly
+#define elf_backend_plt_readonly 1
+#undef elf_backend_got_header_size
+#define elf_backend_got_header_size 12
+
+#undef bfd_elf32_bfd_link_hash_table_create
+#define bfd_elf32_bfd_link_hash_table_create \
+ ppc_elf_vxworks_link_hash_table_create
+#undef elf_backend_add_symbol_hook
+#define elf_backend_add_symbol_hook \
+ ppc_elf_vxworks_add_symbol_hook
+#undef elf_backend_link_output_symbol_hook
+#define elf_backend_link_output_symbol_hook \
+ elf_vxworks_link_output_symbol_hook
+#undef elf_backend_final_write_processing
+#define elf_backend_final_write_processing \
+ ppc_elf_vxworks_final_write_processing
+#undef elf_backend_get_sec_type_attr
+#define elf_backend_get_sec_type_attr \
+ ppc_elf_vxworks_get_sec_type_attr
+#undef elf_backend_emit_relocs
+#define elf_backend_emit_relocs \
+ elf_vxworks_emit_relocs
+
+#undef elf32_bed
+#define elf32_bed ppc_elf_vxworks_bed
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff