/* PowerPC-specific support for 32-bit ELF
- Copyright 1994, 1995, 1996 Free Software Foundation, Inc.
+ Copyright 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
static void ppc_elf_info_to_howto
PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
static void ppc_elf_howto_init PARAMS ((void));
+static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
+static int ppc_elf_additional_program_headers PARAMS ((bfd *));
+static boolean ppc_elf_modify_segment_map PARAMS ((bfd *));
+
static boolean ppc_elf_section_from_shdr PARAMS ((bfd *,
Elf32_Internal_Shdr *,
char *));
+static boolean ppc_elf_fake_sections
+ PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
-static bfd *ppc_elf_create_dynamic_sections PARAMS ((bfd *abfd,
- struct bfd_link_info *info));
+static elf_linker_section_t *ppc_elf_create_linker_section
+ PARAMS ((bfd *abfd,
+ struct bfd_link_info *info,
+ enum elf_linker_section_enum));
static boolean ppc_elf_check_relocs PARAMS ((bfd *,
struct bfd_link_info *,
Elf_Internal_Sym *local_syms,
asection **));
+static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *,
+ struct bfd_link_info *,
+ const Elf_Internal_Sym *,
+ const char **,
+ flagword *,
+ asection **,
+ bfd_vma *));
+
static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *,
struct bfd_link_info *,
struct elf_link_hash_entry *,
static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
-#define BRANCH_PREDICT_BIT 0x200000
+#define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
+#define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
+#define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
/* The name of the dynamic interpreter. This is put in the .interp
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
+/* The size in bytes of an entry in the procedure linkage table, and of the initial size
+ of the plt reserved for the dynamic linker. */
+
+#define PLT_ENTRY_SIZE 12
+#define PLT_INITIAL_ENTRY_SIZE 72
+
\f
static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ];
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_addr16_ha_reloc, /* special_function */
"R_PPC_ADDR16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
false), /* pcrel_offset */
/* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
- the symbol. FIXME: Not supported. */
+ the symbol. */
HOWTO (R_PPC_GOT16_HA, /* type */
- 0, /* rightshift */
+ 16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_addr16_ha_reloc, /* special_function */
"R_PPC_GOT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
- /* A sign-extended 16 bit value relative to _SDA_BASE, for use with
- small data items. FIXME: Not supported. */
+ /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
+ small data items. */
HOWTO (R_PPC_SDAREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0xffff, /* dst_mask */
false), /* pcrel_offset */
- /* These next 4 relocations were added by Sun. */
- /* 32-bit section relative relocation. FIXME: not supported. */
+ /* 32-bit section relative relocation. */
HOWTO (R_PPC_SECTOFF, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* dst_mask */
true), /* pcrel_offset */
- /* 16-bit lower half section relative relocation. FIXME: not supported. */
+ /* 16-bit lower half section relative relocation. */
HOWTO (R_PPC_SECTOFF_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0xffff, /* dst_mask */
false), /* pcrel_offset */
- /* 16-bit upper half section relative relocation. FIXME: not supported. */
+ /* 16-bit upper half section relative relocation. */
HOWTO (R_PPC_SECTOFF_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0xffff, /* dst_mask */
false), /* pcrel_offset */
- /* 16-bit upper half adjusted section relative relocation. FIXME: not supported. */
+ /* 16-bit upper half adjusted section relative relocation. */
HOWTO (R_PPC_SECTOFF_HA, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
-/* 16 bit value resulting from the addend minus the symbol */
+ /* 16 bit value resulting from the addend minus the symbol */
HOWTO (R_PPC_EMB_NADDR16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0xffff, /* dst_mask */
false), /* pcrel_offset */
+ /* 16 bit value resulting from allocating a 4 byte word to hold an
+ address in the .sdata section, and returning the offset from
+ _SDA_BASE_ for that relocation */
+ HOWTO (R_PPC_EMB_SDAI16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC_EMB_SDAI16", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 16 bit value resulting from allocating a 4 byte word to hold an
+ address in the .sdata2 section, and returning the offset from
+ _SDA2_BASE_ for that relocation */
+ HOWTO (R_PPC_EMB_SDA2I16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC_EMB_SDA2I16", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
+ small data items. */
+ HOWTO (R_PPC_EMB_SDA2REL, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC_EMB_SDA2REL", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
+ signed offset from the appropriate base, and filling in the register
+ field with the appropriate register (0, 2, or 13). */
+ HOWTO (R_PPC_EMB_SDA21, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC_EMB_SDA21", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Relocation not handled: R_PPC_EMB_MRKREF */
+ /* Relocation not handled: R_PPC_EMB_RELSEC16 */
+ /* Relocation not handled: R_PPC_EMB_RELST_LO */
+ /* Relocation not handled: R_PPC_EMB_RELST_HI */
+ /* Relocation not handled: R_PPC_EMB_RELST_HA */
+ /* Relocation not handled: R_PPC_EMB_BIT_FLD */
+
+ /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
+ in the 16 bit signed offset from the appropriate base, and filling in the
+ register field with the appropriate register (0, 2, or 13). */
+ HOWTO (R_PPC_EMB_RELSDA, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC_EMB_RELSDA", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
/* Phony reloc to handle AIX style TOC entries */
HOWTO (R_PPC_TOC16, /* type */
0, /* rightshift */
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break;
case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break;
case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break;
+ case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break;
+ case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break;
+ case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break;
+ case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break;
+ case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break;
+ case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break;
+ case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break;
+ case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break;
+ case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break;
+ case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break;
+ case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break;
+ case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break;
+ case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break;
}
return ppc_elf_howto_table[ (int)ppc_reloc ];
cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
}
+/* Handle the R_PPC_ADDR16_HA reloc. */
+
+static bfd_reloc_status_type
+ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ bfd_vma relocation;
+
+ if (output_bfd != NULL)
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ if (reloc_entry->address > input_section->_cooked_size)
+ return bfd_reloc_outofrange;
+
+ if (bfd_is_com_section (symbol->section))
+ relocation = 0;
+ else
+ relocation = symbol->value;
+
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+
+ reloc_entry->addend += (relocation & 0x8000) << 1;
+
+ return bfd_reloc_continue;
+}
+
/* Function to set whether a module needs the -mrelocatable bit set. */
static boolean
bfd *ibfd;
bfd *obfd;
{
- /* This function is selected based on the input vector. We only
- want to copy information over if the output BFD also uses Elf
- format. */
- if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return true;
BFD_ASSERT (!elf_flags_init (obfd)
return false;
}
- /* This function is selected based on the input vector. We only
- want to copy information over if the output BFD also uses Elf
- format. */
- if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ 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;
("%s: compiled normally and linked with modules compiled with -mrelocatable",
bfd_get_filename (ibfd));
}
- else if ((new_flags & EF_PPC_RELOCATABLE_LIB) != 0)
- elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE_LIB;
+ /* If -mrelocatable-lib is linked with an object without -mrelocatable-lib, turn off
+ the -mrelocatable-lib, since at least one module isn't relocatable. */
+ else if ((old_flags & EF_PPC_RELOCATABLE_LIB) != 0
+ && (new_flags & EF_PPC_RELOCATABLE_LIB) == 0)
+ elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
- new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB);
- old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB);
- /* Warn about eabi vs. V.4 mismatch */
- if ((new_flags & EF_PPC_EMB) != 0 && (old_flags & EF_PPC_EMB) == 0)
- {
- new_flags &= ~EF_PPC_EMB;
- error = true;
- (*_bfd_error_handler)
- ("%s: compiled for the eabi and linked with modules compiled for System V",
- bfd_get_filename (ibfd));
- }
- else if ((new_flags & EF_PPC_EMB) == 0 && (old_flags & EF_PPC_EMB) != 0)
- {
- old_flags &= ~EF_PPC_EMB;
- error = true;
- (*_bfd_error_handler)
- ("%s: compiled for System V and linked with modules compiled for eabi",
- bfd_get_filename (ibfd));
- }
+ /* 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)
\f
/* Set up any other section flags and such that may be necessary. */
-boolean
+static boolean
ppc_elf_fake_sections (abfd, shdr, asect)
bfd *abfd;
Elf32_Internal_Shdr *shdr;
if ((asect->flags & SEC_SORT_ENTRIES) != 0)
shdr->sh_type = SHT_ORDERED;
+
+ return true;
}
\f
-/* Create the PowerPC dynamic sections */
-
-static bfd *
-ppc_elf_create_dynamic_sections (abfd, info)
+/* Create a special linker section */
+static elf_linker_section_t *
+ppc_elf_create_linker_section (abfd, info, which)
bfd *abfd;
struct bfd_link_info *info;
+ enum elf_linker_section_enum which;
{
- struct elf_link_hash_entry *h;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ elf_linker_section_t *lsect;
- /* Create the .got section. */
- if (! _bfd_elf_create_got_section (abfd, info))
- return (bfd *)0;
+ /* Record the first bfd section that needs the special section */
+ if (!dynobj)
+ dynobj = elf_hash_table (info)->dynobj = abfd;
- /* Also create the .got.neg section where we put negative offsets */
- if (bfd_get_section_by_name (abfd, ".got.neg") == NULL)
+ /* If this is the first time, create the section */
+ lsect = elf_linker_section (dynobj, which);
+ if (!lsect)
{
- asection *s = bfd_make_section (abfd, ".got.neg");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s,
- SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY)
- || !bfd_set_section_alignment (abfd, s, 2))
- return (bfd *)0;
+ elf_linker_section_t defaults;
+ static elf_linker_section_t zero_section;
+
+ defaults = zero_section;
+ defaults.which = which;
+ defaults.hole_written_p = false;
+ defaults.alignment = 2;
+ defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+
+ switch (which)
+ {
+ default:
+ (*_bfd_error_handler) ("%s: Unknown special linker type %d",
+ bfd_get_filename (abfd),
+ (int)which);
+
+ bfd_set_error (bfd_error_bad_value);
+ return (elf_linker_section_t *)0;
+
+ case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
+ defaults.name = ".sdata";
+ defaults.rel_name = ".rela.sdata";
+ defaults.bss_name = ".sbss";
+ defaults.sym_name = "_SDA_BASE_";
+ defaults.sym_offset = 32768;
+ break;
+
+ case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
+ defaults.name = ".sdata2";
+ defaults.rel_name = ".rela.sdata2";
+ defaults.bss_name = ".sbss2";
+ defaults.sym_name = "_SDA2_BASE_";
+ defaults.sym_offset = 32768;
+ defaults.flags |= SEC_READONLY;
+ break;
+ }
+
+ lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
}
- elf_hash_table (info)->dynobj = abfd;
- return abfd;
+ return lsect;
+}
+
+\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 (abfd)
+ bfd *abfd;
+{
+ asection *s;
+ int ret;
+
+ ret = 0;
+
+ s = bfd_get_section_by_name (abfd, ".interp");
+ if (s != NULL)
+ ++ret;
+
+ s = bfd_get_section_by_name (abfd, ".sbss2");
+ if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
+ ++ret;
+
+ s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
+ if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
+ ++ret;
+
+ return ret;
}
+/* Modify the segment map if needed */
+
+static boolean
+ppc_elf_modify_segment_map (abfd)
+ bfd *abfd;
+{
+ 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
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
{
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ asection *s;
+ unsigned int power_of_two;
+ bfd_vma plt_offset;
+
#ifdef DEBUG
- fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called\n");
+ 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. */
+ BFD_ASSERT (dynobj != NULL
+ && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
+ || h->weakdef != NULL
+ || ((h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (h->elf_link_hash_flags
+ & ELF_LINK_HASH_REF_REGULAR) != 0
+ && (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)));
+
+
+ /* If this is a function, put it in the procedure linkage table. We
+ will fill in the contents of the procedure linkage table later,
+ when we know the address of the .got section. */
+ if (h->type == STT_FUNC
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ {
+ if (! info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
+ {
+ /* This case can occur if we saw a PLT32 reloc in an input
+ file, but the symbol was never referred to by a dynamic
+ object. In such a case, we don't actually need to build
+ a procedure linkage table, and we can just do a PC32
+ reloc instead. */
+ BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
+ return true;
+ }
+
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (h->dynindx == -1)
+ {
+ if (! bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ s = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (s != NULL);
+
+ /* If this is the first .plt entry, make room for the special
+ first entry. */
+ if (s->_raw_size == 0)
+ s->_raw_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. */
+ plt_offset = (PLT_INITIAL_ENTRY_SIZE
+ + 8 * ((s->_raw_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->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = plt_offset;
+ }
+
+ h->plt_offset = plt_offset;
+
+ /* Make room for this entry. */
+ s->_raw_size += PLT_ENTRY_SIZE;
+
+ /* We also need to make an entry in the .rela.plt section. */
+ s = bfd_get_section_by_name (dynobj, ".rela.plt");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size += sizeof (Elf32_External_Rela);
+
+ return true;
+ }
+
+ /* 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->weakdef != NULL)
+ {
+ BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
+ || h->weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->weakdef->root.u.def.section;
+ h->root.u.def.value = h->weakdef->root.u.def.value;
+ 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;
+
+ /* 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. */
+
+ s = bfd_get_section_by_name (dynobj, ".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;
+
+ srel = bfd_get_section_by_name (dynobj, ".rela.bss");
+ BFD_ASSERT (srel != NULL);
+ srel->_raw_size += sizeof (Elf32_External_Rela);
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
+ }
+
+ /* 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 > 3)
+ power_of_two = 3;
+
+ /* Apply the required alignment. */
+ s->_raw_size = BFD_ALIGN (s->_raw_size,
+ (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (dynobj, s))
+ {
+ if (! bfd_set_section_alignment (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->_raw_size;
+
+ /* Increment the section size to make room for the symbol. */
+ s->_raw_size += h->size;
+
return true;
}
{
bfd *dynobj;
asection *s;
+ boolean plt;
+ boolean relocs;
boolean reltext;
- boolean relplt;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
-
- /* Make space for the trailing nop in .plt. */
- s = bfd_get_section_by_name (dynobj, ".plt");
- BFD_ASSERT (s != NULL);
- if (s->_raw_size > 0)
- s->_raw_size += 4;
}
else
{
- /* We may have created entries in the .rela.got section.
- However, if we are not creating the dynamic sections, we will
- not actually use these entries. Reset the size of .rela.got,
- which will cause it to get stripped from the output file
- below. */
- s = bfd_get_section_by_name (dynobj, ".rela.got");
- if (s != NULL)
- s->_raw_size = 0;
-
- /* Ditto for .rela.got.neg */
- s = bfd_get_section_by_name (dynobj, ".rela.got.neg");
- if (s != NULL)
- s->_raw_size = 0;
+ /* We may have created entries in the .rela.got, .rela.sdata, and
+ .rela.sdata2 sections. However, if we are not creating the
+ dynamic sections, we will not actually use these entries. Reset
+ the size of .rela.got, et al, which will cause it to get
+ stripped from the output file below. */
+ static char *rela_sections[] = { ".rela.got", ".rela.sdata", ".rela.sdata", (char *)0 };
+ char **p;
+
+ for (p = rela_sections; *p != (char *)0; p++)
+ {
+ s = bfd_get_section_by_name (dynobj, *p);
+ if (s != NULL)
+ s->_raw_size = 0;
+ }
}
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
memory for them. */
+ plt = false;
+ relocs = false;
reltext = false;
- relplt = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
const char *name;
boolean strip;
- if ((s->flags & SEC_IN_MEMORY) == 0)
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
/* It's OK to base decisions on the section name, because none
strip = false;
- if (strncmp (name, ".rela", 5) == 0)
+ if (strcmp (name, ".plt") == 0)
+ {
+ if (s->_raw_size == 0)
+ {
+ /* Strip this section if we don't need it; see the
+ comment below. */
+ strip = true;
+ }
+ else
+ {
+ /* Remember whether there is a PLT. */
+ plt = true;
+ }
+ }
+ else if (strncmp (name, ".rela", 5) == 0)
{
if (s->_raw_size == 0)
{
/* If we don't need this section, strip it from the
- output file. This is to handle .rela.bss and
- .rel.plt. We must create it in
- create_dynamic_sections, because it must be created
+ 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
else
{
asection *target;
+ const char *outname;
+
+ /* Remember whether there are any relocation sections. */
+ relocs = true;
/* If this relocation section applies to a read only
section, then we probably need a DT_TEXTREL entry. */
- target = bfd_get_section_by_name (output_bfd, name + 5);
+ outname = bfd_get_section_name (output_bfd,
+ s->output_section);
+ target = bfd_get_section_by_name (output_bfd, outname + 5);
if (target != NULL
&& (target->flags & SEC_READONLY) != 0)
reltext = true;
- if (strcmp (name, ".rela.plt") == 0)
- relplt = 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 if (strcmp (name, ".plt") != 0
- && strcmp (name, ".got") != 0
- && strcmp (name, ".got.neg") != 0)
+ else if (strcmp (name, ".got") != 0
+ && strcmp (name, ".sdata") != 0
+ && strcmp (name, ".sdata2") != 0)
{
/* It's not one of our sections, so don't allocate space. */
continue;
}
/* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
if (s->contents == NULL && s->_raw_size != 0)
return false;
}
return false;
}
- if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0))
- return false;
-
- if (relplt)
+ if (plt)
{
- if (! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
+ if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|| ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
return false;
}
- if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
- || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
- || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
- sizeof (Elf32_External_Rela)))
- return false;
+ if (relocs)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
+ sizeof (Elf32_External_Rela)))
+ return false;
+ }
if (reltext)
{
symbol for each output section. These are local symbols, which
means that they must come first in the dynamic symbol table.
That means we must increment the dynamic symbol index of every
- other dynamic symbol. */
+ other dynamic symbol.
+
+ FIXME: We assume that there will never be relocations to
+ locations in linker-created sections that do not have
+ externally-visible names. Instead, we should work out precisely
+ which sections relocations are targetted at. */
if (info->shared)
{
int c, i;
- c = bfd_count_sections (output_bfd);
+ for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_LINKER_CREATED) != 0)
+ continue;
+ c++;
+ }
+
elf_link_hash_traverse (elf_hash_table (info),
ppc_elf_adjust_dynindx,
(PTR) &c);
elf_hash_table (info)->dynsymcount += c;
- for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++)
+ for (i = 1, s = output_bfd->sections; s != NULL; s = s->next)
{
- elf_section_data (s)->dynindx = i;
- /* These symbols will have no names, so we don't need to
- fiddle with dynstr_index. */
+ if ((s->flags & SEC_LINKER_CREATED) != 0)
+ elf_section_data (s)->dynindx = -1;
+ else
+ {
+ elf_section_data (s)->dynindx = i;
+ /* These symbols will have no names, so we don't need to
+ fiddle with dynstr_index. */
+ i++;
+ }
}
+
+ BFD_ASSERT(i == c + 1);
}
return true;
asection *sec;
const Elf_Internal_Rela *relocs;
{
+ boolean ret = true;
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
- bfd_vma *local_got_offsets;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
- asection *sgot;
- asection *sgot_neg;
- asection *srelgot;
- asection *srelgot_neg;
+ bfd_vma *local_got_offsets;
+ elf_linker_section_t *sdata;
+ elf_linker_section_t *sdata2;
asection *sreloc;
+ asection *sgot;
+ asection *srelgot = NULL;
if (info->relocateable)
return true;
#ifdef DEBUG
- fprintf (stderr, "ppc_elf_check_relocs called for section %s\n", sec->name);
+ fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
+ bfd_get_section_name (abfd, sec),
+ bfd_get_filename (abfd));
#endif
+ /* Create the linker generated sections all the time so that the
+ special symbols are created. */
+
+ if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL)
+ {
+ sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
+ if (!sdata)
+ ret = false;
+ }
+
+
+ if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL)
+ {
+ sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2);
+ if (!sdata2)
+ ret = false;
+ }
+
dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_offsets = elf_local_got_offsets (abfd);
- sgot = NULL;
- srelgot = NULL;
+ /* FIXME: We should only create the .got section if we need it.
+ Otherwise we waste space in a statically linked executable. */
+
+ if (! _bfd_elf_create_got_section (dynobj, info))
+ return false;
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (sgot != NULL);
+
sreloc = NULL;
rel_end = relocs + sec->reloc_count;
switch (ELF32_R_TYPE (rel->r_info))
{
+ /* GOT16 relocations */
case R_PPC_GOT16:
case R_PPC_GOT16_LO:
case R_PPC_GOT16_HI:
case R_PPC_GOT16_HA:
-#ifdef DEBUG
- fprintf (stderr, "Reloc requires a GOT entry\n");
-#endif
- /* This symbol requires a global offset table entry. */
-
- if (dynobj == NULL)
- {
- dynobj = ppc_elf_create_dynamic_sections (abfd, info);
- if (!dynobj)
- return false;
- }
-
- if (sgot == NULL)
- {
- sgot = bfd_get_section_by_name (dynobj, ".got");
- sgot_neg = bfd_get_section_by_name (dynobj, ".got.neg");
- BFD_ASSERT (sgot != NULL && sgot_neg != NULL);
- }
-
if (srelgot == NULL
&& (h != NULL || info->shared))
{
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
- | SEC_READONLY))
- || ! bfd_set_section_alignment (dynobj, srelgot, 2))
- return false;
- }
-
- srelgot_neg = bfd_get_section_by_name (dynobj, ".rela.got.neg");
- if (srelgot_neg == NULL)
- {
- srelgot_neg = bfd_make_section (dynobj, ".rela.got.neg");
- if (srelgot == NULL
- || ! bfd_set_section_flags (dynobj, srelgot_neg,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
| SEC_READONLY))
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
return false;
break;
- case R_PPC_PLT32:
- case R_PPC_PLTREL24:
- case R_PPC_PLT16_LO:
- case R_PPC_PLT16_HI:
- case R_PPC_PLT16_HA:
-#ifdef DEBUG
- fprintf (stderr, "Reloc requires a PLT entry\n");
-#endif
- /* This symbol requires a procedure linkage table entry. We
- actually build the entry in adjust_dynamic_symbol,
- because this might be a case of linking PIC code without
- linking in any dynamic objects, in which case we don't
- need to generate a procedure linkage table after all. */
-
+ /* Indirect .sdata relocation */
+ case R_PPC_EMB_SDAI16:
+ if (info->shared)
+ {
+ (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object",
+ bfd_get_filename (abfd),
+ "R_PPC_EMB_SDAI16");
+ ret = false;
+ break;
+ }
+
+ if (srelgot == NULL
+ && (h != NULL || info->shared))
+ {
+ srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+ if (srelgot == NULL)
+ {
+ srelgot = bfd_make_section (dynobj, ".rela.got");
+ if (srelgot == NULL
+ || ! bfd_set_section_flags (dynobj, srelgot,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | SEC_READONLY))
+ || ! bfd_set_section_alignment (dynobj, srelgot, 2))
+ return false;
+ }
+ }
+
+ if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel))
+ ret = false;
+
+ break;
+
+ /* Indirect .sdata2 relocation */
+ case R_PPC_EMB_SDA2I16:
+ if (info->shared)
+ {
+ (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object",
+ bfd_get_filename (abfd),
+ "R_PPC_EMB_SDA2I16");
+ ret = false;
+ break;
+ }
+
+ if (srelgot == NULL
+ && (h != NULL || info->shared))
+ {
+ srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+ if (srelgot == NULL)
+ {
+ srelgot = bfd_make_section (dynobj, ".rela.got");
+ if (srelgot == NULL
+ || ! bfd_set_section_flags (dynobj, srelgot,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | SEC_READONLY))
+ || ! bfd_set_section_alignment (dynobj, srelgot, 2))
+ return false;
+ }
+ }
+
+ if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel))
+ return false;
+
+ break;
+
+ case R_PPC_SDAREL16:
+ case R_PPC_EMB_SDA2REL:
+ case R_PPC_EMB_SDA21:
+ if (info->shared)
+ {
+ (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object",
+ bfd_get_filename (abfd),
+ ppc_elf_howto_table[(int)ELF32_R_TYPE (rel->r_info)]->name);
+ ret = false;
+ }
+ break;
+
+ case R_PPC_PLT32:
+ case R_PPC_PLTREL24:
+ case R_PPC_PLT16_LO:
+ case R_PPC_PLT16_HI:
+ case R_PPC_PLT16_HA:
+#ifdef DEBUG
+ fprintf (stderr, "Reloc requires a PLT entry\n");
+#endif
+ /* This symbol requires a procedure linkage table entry. We
+ actually build the entry in adjust_dynamic_symbol,
+ because this might be a case of linking PIC code without
+ linking in any dynamic objects, in which case we don't
+ need to generate a procedure linkage table after all. */
+
if (h == NULL)
{
/* It does not make sense to have a procedure linkage
table entry for a local symbol. */
bfd_set_error (bfd_error_bad_value);
- return false;
+ ret = false;
+ break;
}
/* Make sure this symbol is output as a dynamic symbol. */
if (h->dynindx == -1)
{
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
+ {
+ ret = false;
+ break;
+ }
}
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
break;
-#if 0
- case R_SPARC_PC10:
- case R_SPARC_PC22:
+ /* The following relocations don't need to propagate the
+ relocation if linking a shared object since they are
+ section relative. */
+ case R_PPC_SECTOFF:
+ case R_PPC_SECTOFF_LO:
+ case R_PPC_SECTOFF_HI:
+ case R_PPC_SECTOFF_HA:
+ break;
+
+ /* This refers only to functions defined in the shared library */
+ case R_PPC_LOCAL24PC:
+ break;
+
+ /* 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_REL24:
if (h != NULL
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
break;
- /* Fall through. */
- case R_SPARC_DISP8:
- case R_SPARC_DISP16:
- case R_SPARC_DISP32:
- case R_SPARC_WDISP30:
- case R_SPARC_WDISP22:
+ /* fall through */
+
+ case R_PPC_REL14:
+ case R_PPC_REL14_BRTAKEN:
+ case R_PPC_REL14_BRNTAKEN:
if (h == NULL)
break;
- /* Fall through. */
- case R_SPARC_8:
- case R_SPARC_16:
- case R_SPARC_32:
- case R_SPARC_HI22:
- case R_SPARC_22:
- case R_SPARC_13:
- case R_SPARC_LO10:
- case R_SPARC_UA32:
- if (info->shared
- && (sec->flags & SEC_ALLOC) != 0)
+ /* fall through */
+
+ default:
+ if (info->shared)
{
- /* 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. */
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n",
+ (h && h->root.root.string) ? h->root.root.string : "<unknown>");
+#endif
if (sreloc == NULL)
{
const char *name;
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
if (name == NULL)
- return false;
+ {
+ ret = false;
+ break;
+ }
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (abfd, sec),
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
| SEC_READONLY))
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
- return false;
+ {
+ ret = false;
+ break;
+ }
}
}
}
break;
-#endif
+ }
+ }
- default:
- break;
+ return ret;
+}
+
+\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. */
+
+/*ARGSUSED*/
+static boolean
+ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ const Elf_Internal_Sym *sym;
+ const char **namep;
+ flagword *flagsp;
+ asection **secp;
+ bfd_vma *valp;
+{
+ if (sym->st_shndx == SHN_COMMON && !info->relocateable && sym->st_size <= bfd_get_gp_size (abfd))
+ {
+ /* Common symbols less than or equal to -G nn bytes are automatically
+ put into .sdata. */
+ elf_linker_section_t *sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
+ if (!sdata->bss_section)
+ {
+ /* We don't go through bfd_make_section, because we don't
+ want to attach this common section to DYNOBJ. The linker
+ will move the symbols to the appropriate output section
+ when it defines common symbols. */
+ sdata->bss_section = ((asection *)
+ bfd_zalloc (abfd, sizeof (asection)));
+ if (sdata->bss_section == NULL)
+ return false;
+ sdata->bss_section->name = sdata->bss_name;
+ sdata->bss_section->flags = SEC_IS_COMMON;
+ sdata->bss_section->output_section = sdata->bss_section;
+ sdata->bss_section->symbol =
+ (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
+ sdata->bss_section->symbol_ptr_ptr =
+ (asymbol **) bfd_zalloc (abfd, sizeof (asymbol *));
+ if (sdata->bss_section->symbol == NULL
+ || sdata->bss_section->symbol_ptr_ptr == NULL)
+ return false;
+ sdata->bss_section->symbol->name = sdata->bss_name;
+ sdata->bss_section->symbol->flags = BSF_SECTION_SYM;
+ sdata->bss_section->symbol->section = sdata->bss_section;
+ *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol;
}
+
+ *secp = sdata->bss_section;
+ *valp = sym->st_size;
}
return true;
bfd *dynobj;
#ifdef DEBUG
- fprintf (stderr, "ppc_elf_finish_dynamic_symbol called\n");
+ fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", h->root.root.string);
#endif
dynobj = elf_hash_table (info)->dynobj;
+ BFD_ASSERT (dynobj != NULL);
if (h->plt_offset != (bfd_vma) -1)
{
asection *srela;
Elf_Internal_Rela rela;
+#ifdef DEBUG
+ fprintf (stderr, ", plt_offset = %d", h->plt_offset);
+#endif
+
/* This symbol has an entry in the procedure linkage table. Set
it up. */
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (splt != NULL && srela != NULL);
- /* Fill in the entry in the procedure linkage table. */
-#if 0
- bfd_put_32 (output_bfd,
- PLT_ENTRY_WORD0 + h->plt_offset,
- splt->contents + h->plt_offset);
- bfd_put_32 (output_bfd,
- (PLT_ENTRY_WORD1
- + (((- (h->plt_offset + 4)) >> 2) & 0x3fffff)),
- splt->contents + h->plt_offset + 4);
- bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
- splt->contents + h->plt_offset + 8);
+ /* We don't need to fill in the .plt. The ppc dynamic linker
+ will fill it in. */
/* Fill in the entry in the .rela.plt section. */
rela.r_offset = (splt->output_section->vma
+ splt->output_offset
+ h->plt_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
rela.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rela,
((Elf32_External_Rela *) srela->contents
- + h->plt_offset / PLT_ENTRY_SIZE - 4));
-#endif
+ + ((h->plt_offset - PLT_INITIAL_ENTRY_SIZE) / 8)));
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
{
/* This symbols needs a copy reloc. Set it up. */
+#ifdef DEBUG
+ fprintf (stderr, ", copy");
+#endif
+
BFD_ASSERT (h->dynindx != -1);
s = bfd_get_section_by_name (h->root.u.def.section->owner,
++s->reloc_count;
}
+#ifdef DEBUG
+ fprintf (stderr, "\n");
+#endif
+
/* Mark some specially defined symbols as absolute. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
bfd *output_bfd;
struct bfd_link_info *info;
{
- bfd *dynobj;
asection *sdyn;
- asection *sgot;
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ asection *sgot = bfd_get_section_by_name (dynobj, ".got");
#ifdef DEBUG
fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
#endif
- dynobj = elf_hash_table (info)->dynobj;
-
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (elf_hash_table (info)->dynamic_sections_created)
switch (dyn.d_tag)
{
- case DT_PLTGOT: name = ".plt"; size = false; break;
- case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
+ case DT_PLTGOT: name = ".plt"; size = false; break;
+ case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
case DT_JMPREL: name = ".rela.plt"; size = false; break;
- default: name = NULL; size = false; break;
+ default: name = NULL; size = false; break;
}
if (name != NULL)
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
}
}
-
- /* Clear the first four entries in the procedure linkage table,
- and put a nop in the last four bytes. */
-#if 0
- if (splt->_raw_size > 0)
- {
- memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE);
- bfd_put_32 (output_bfd, SPARC_NOP,
- splt->contents + splt->_raw_size - 4);
- }
-
- elf_section_data (splt->output_section)->this_hdr.sh_entsize =
- PLT_ENTRY_SIZE;
-#endif
}
- /* Set the first entry in the global offset table to the address of
- the dynamic section. */
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- if (sgot->_raw_size > 0)
+ /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
+ easily find the address of the _GLOBAL_OFFSET_TABLE_. */
+ if (sgot)
{
+ unsigned char *contents = sgot->contents;
+ bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
+
if (sdyn == NULL)
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
+ bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
else
bfd_put_32 (output_bfd,
sdyn->output_section->vma + sdyn->output_offset,
- sgot->contents);
- }
+ contents+4);
- elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+ elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+ }
if (info->shared)
{
asection *sdynsym;
asection *s;
Elf_Internal_Sym sym;
+ int maxdindx = 0;
/* Set up the section symbols for the output sections. */
for (s = output_bfd->sections; s != NULL; s = s->next)
{
- int indx;
+ int indx, dindx;
sym.st_value = s->vma;
indx = elf_section_data (s)->this_idx;
- BFD_ASSERT (indx > 0);
- sym.st_shndx = indx;
-
- bfd_elf32_swap_symbol_out (output_bfd, &sym,
- (PTR) (((Elf32_External_Sym *)
- sdynsym->contents)
- + elf_section_data (s)->dynindx));
+ dindx = elf_section_data (s)->dynindx;
+ if (dindx != -1)
+ {
+ BFD_ASSERT(indx > 0);
+ BFD_ASSERT(dindx > 0);
+
+ if (dindx > maxdindx)
+ maxdindx = dindx;
+
+ sym.st_shndx = indx;
+
+ bfd_elf32_swap_symbol_out (output_bfd, &sym,
+ (PTR) (((Elf32_External_Sym *)
+ sdynsym->contents)
+ + dindx));
+ }
}
/* Set the sh_info field of the output .dynsym section to the
index of the first global symbol. */
elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
- bfd_count_sections (output_bfd) + 1;
+ maxdindx + 1;
}
return true;
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
bfd *dynobj = elf_hash_table (info)->dynobj;
- bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd);
- asection *sgot = (asection *)0;
+ elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL;
+ elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL;
Elf_Internal_Rela *rel = relocs;
Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
+ asection *sreloc = NULL;
+ asection *splt = NULL;
+ asection *sgot = NULL;
+ bfd_vma *local_got_offsets;
boolean ret = true;
long insn;
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
ppc_elf_howto_init ();
+ local_got_offsets = elf_local_got_offsets (input_bfd);
+
for (; rel < relend; rel++)
{
enum ppc_reloc_type r_type = (enum ppc_reloc_type)ELF32_R_TYPE (rel->r_info);
Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0;
asection *sec = (asection *)0;
struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0;
+ const char *sym_name = (const char *)0;
reloc_howto_type *howto;
unsigned long r_symndx;
bfd_vma relocation;
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
+ sym_name = "<local symbol>";
+
relocation = (sec->output_section->vma
+ sec->output_offset
+ sym->st_value);
else
{
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;
+ sym_name = h->root.root.string;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
- relocation = (h->root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
+ if ((r_type == R_PPC_PLT32
+ && h->plt_offset != (bfd_vma) -1)
+ || ((r_type == R_PPC_GOT16
+ || r_type == R_PPC_GOT16_LO
+ || r_type == R_PPC_GOT16_HI
+ || r_type == R_PPC_GOT16_HA)
+ && elf_hash_table (info)->dynamic_sections_created
+ && (! info->shared
+ || ! info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ || (info->shared
+ && (! info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ && (input_section->flags & SEC_ALLOC) != 0
+ && (r_type == R_PPC_ADDR32
+ || r_type == R_PPC_ADDR24
+ || r_type == R_PPC_ADDR16
+ || r_type == R_PPC_ADDR16_LO
+ || r_type == R_PPC_ADDR16_HI
+ || r_type == R_PPC_ADDR16_HA
+ || r_type == R_PPC_ADDR14
+ || r_type == R_PPC_ADDR14_BRTAKEN
+ || r_type == R_PPC_ADDR14_BRNTAKEN
+ || r_type == R_PPC_PLTREL24
+ || r_type == R_PPC_COPY
+ || r_type == R_PPC_GLOB_DAT
+ || r_type == R_PPC_JMP_SLOT
+ || r_type == R_PPC_UADDR32
+ || r_type == R_PPC_UADDR16
+ || r_type == R_PPC_REL32
+ || r_type == R_PPC_SDAREL16
+ || r_type == R_PPC_EMB_NADDR32
+ || r_type == R_PPC_EMB_NADDR16
+ || r_type == R_PPC_EMB_NADDR16_LO
+ || r_type == R_PPC_EMB_NADDR16_HI
+ || r_type == R_PPC_EMB_NADDR16_HA
+ || r_type == R_PPC_EMB_SDAI16
+ || r_type == R_PPC_EMB_SDA2I16
+ || r_type == R_PPC_EMB_SDA2REL
+ || r_type == R_PPC_EMB_SDA21
+ || r_type == R_PPC_EMB_MRKREF
+ || r_type == R_PPC_EMB_BIT_FLD
+ || r_type == R_PPC_EMB_RELSDA
+ || ((r_type == R_PPC_REL24
+ || r_type == R_PPC_REL14
+ || r_type == R_PPC_REL14_BRTAKEN
+ || r_type == R_PPC_REL14_BRNTAKEN
+ || r_type == R_PPC_RELATIVE)
+ && strcmp (h->root.root.string,
+ "_GLOBAL_OFFSET_TABLE_") != 0))))
+ {
+ /* In these cases, we don't need the relocation
+ value. We check specially because in some
+ obscure cases sec->output_section will be NULL. */
+ relocation = 0;
+ }
+ else
+ relocation = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
switch ((int)r_type)
{
default:
- (*_bfd_error_handler) ("%s: unknown relocation type %d",
+ (*_bfd_error_handler) ("%s: unknown relocation type %d for symbol %s",
bfd_get_filename (input_bfd),
- (int)r_type);
+ (int)r_type, sym_name);
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
- case R_PPC_NONE: /* relocations that need no special processing */
- case R_PPC_ADDR32:
- case R_PPC_ADDR24:
- case R_PPC_ADDR16:
- case R_PPC_ADDR16_LO:
- case R_PPC_ADDR16_HI:
- case R_PPC_ADDR14:
- case R_PPC_REL24:
- case R_PPC_REL14:
- case R_PPC_UADDR32:
- case R_PPC_UADDR16:
- case R_PPC_REL32:
+ /* relocations that need no special processing */
+ case (int)R_PPC_LOCAL24PC:
break;
- case (int)R_PPC_ADDR14_BRTAKEN: /* branch taken prediction relocations */
+ case (int)R_PPC_REL24:
+ case (int)R_PPC_REL14:
+ if (h == NULL
+ || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ break;
+ /* fall through */
+
+ /* Relocations that need to be propagated if this is a shared
+ object. */
+ case (int)R_PPC_NONE:
+ case (int)R_PPC_ADDR32:
+ case (int)R_PPC_ADDR24:
+ case (int)R_PPC_ADDR16:
+ case (int)R_PPC_ADDR16_LO:
+ case (int)R_PPC_ADDR16_HI:
+ case (int)R_PPC_ADDR16_HA:
+ case (int)R_PPC_ADDR14:
+ case (int)R_PPC_UADDR32:
+ case (int)R_PPC_UADDR16:
+ case (int)R_PPC_REL32:
+ if (info->shared)
+ {
+ Elf_Internal_Rela outrel;
+ boolean skip;
+
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n",
+ (h && h->root.root.string) ? h->root.root.string : "<unknown>");
+#endif
+
+ /* When generating a shared object, these relocations
+ are copied into the output file to be resolved at run
+ time. */
+
+ if (sreloc == NULL)
+ {
+ const char *name;
+
+ name = (bfd_elf_string_from_elf_section
+ (input_bfd,
+ elf_elfheader (input_bfd)->e_shstrndx,
+ elf_section_data (input_section)->rel_hdr.sh_name));
+ if (name == NULL)
+ return false;
+
+ BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+ && strcmp (bfd_get_section_name (input_bfd,
+ input_section),
+ name + 5) == 0);
+
+ sreloc = bfd_get_section_by_name (dynobj, name);
+ BFD_ASSERT (sreloc != NULL);
+ }
+
+ skip = false;
+
+ if (elf_section_data (input_section)->stab_info == NULL)
+ outrel.r_offset = rel->r_offset;
+ else
+ {
+ bfd_vma off;
+
+ off = (_bfd_stab_section_offset
+ (output_bfd, &elf_hash_table (info)->stab_info,
+ input_section,
+ &elf_section_data (input_section)->stab_info,
+ rel->r_offset));
+ if (off == (bfd_vma) -1)
+ skip = true;
+ outrel.r_offset = off;
+ }
+
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
+
+ if (skip)
+ memset (&outrel, 0, sizeof outrel);
+ /* h->dynindx may be -1 if this symbol was marked to
+ become local. */
+ else if (h != NULL
+ && ((! info->symbolic && h->dynindx != -1)
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ {
+ BFD_ASSERT (h->dynindx != -1);
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+ outrel.r_addend = rel->r_addend;
+ }
+ else
+ {
+ if (r_type == R_PPC_ADDR32)
+ {
+ outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ else
+ {
+ long indx;
+
+ if (h == NULL)
+ sec = local_sections[r_symndx];
+ else
+ {
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined
+ || (h->root.type
+ == bfd_link_hash_defweak));
+ sec = h->root.u.def.section;
+ }
+ if (sec != NULL && bfd_is_abs_section (sec))
+ indx = 0;
+ else if (sec == NULL || sec->owner == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ else
+ {
+ asection *osec;
+
+ osec = sec->output_section;
+ indx = elf_section_data (osec)->dynindx;
+ BFD_ASSERT(indx > 0);
+ }
+
+ outrel.r_info = ELF32_R_INFO (indx, r_type);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ }
+
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel,
+ (((Elf32_External_Rela *)
+ sreloc->contents)
+ + sreloc->reloc_count));
+ ++sreloc->reloc_count;
+
+ /* This reloc will be computed at runtime, so there's no
+ need to do anything now, unless this is a RELATIVE
+ reloc in an unallocated section. */
+ if (skip
+ || (input_section->flags & SEC_ALLOC) != 0
+ || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)
+ continue;
+ }
+
+ /* Arithmetic adjust relocations that aren't going into a
+ shared object. */
+ if (r_type == R_PPC_ADDR16_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). */
+ && sec != NULL)
+ {
+ addend += ((relocation + addend) & 0x8000) << 1;
+ }
+ break;
+
+ /* branch taken prediction relocations */
+ case (int)R_PPC_ADDR14_BRTAKEN:
case (int)R_PPC_REL14_BRTAKEN:
insn = bfd_get_32 (output_bfd, contents + offset);
if ((relocation - offset) & 0x8000)
bfd_put_32 (output_bfd, insn, contents + offset);
break;
- case (int)R_PPC_ADDR14_BRNTAKEN: /* branch not taken predicition relocations */
+ /* branch not taken predicition relocations */
+ case (int)R_PPC_ADDR14_BRNTAKEN:
case (int)R_PPC_REL14_BRNTAKEN:
insn = bfd_get_32 (output_bfd, contents + offset);
if ((relocation - offset) & 0x8000)
bfd_put_32 (output_bfd, insn, contents + offset);
break;
- case (int)R_PPC_GOT16: /* GOT16 relocations */
+ /* GOT16 relocations */
+ case (int)R_PPC_GOT16:
case (int)R_PPC_GOT16_LO:
case (int)R_PPC_GOT16_HI:
case (int)R_PPC_GOT16_HA:
-#ifdef DEBUG
- fprintf (stderr, "GOT relocations in section %s from section %s\n", input_section->name, sec->name);
-#endif
- if (dynobj == NULL)
- {
- dynobj = ppc_elf_create_dynamic_sections (output_bfd, info);
- if (!dynobj)
- {
- ret = false;
- continue;
- }
- }
-
- BFD_ASSERT (sec != (asection *)0);
- if (!sgot)
+ /* Relocation is to the entry for this symbol in the global
+ offset table. */
+ if (sgot == NULL)
{
sgot = bfd_get_section_by_name (dynobj, ".got");
BFD_ASSERT (sgot != NULL);
off &= ~1;
else
{
- bfd_put_32 (output_bfd, relocation,
+ bfd_put_32 (output_bfd, relocation + addend,
sgot->contents + off);
h->got_offset |= 1;
}
}
- relocation = sgot->output_offset + off;
+ relocation = sgot->output_offset + off - 4;
+ addend = 0;
}
else
{
+ sgot->output_offset
+ off);
outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
- outrel.r_addend = 0;
+ outrel.r_addend = relocation + addend;
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
(((Elf32_External_Rela *)
srelgot->contents)
local_got_offsets[r_symndx] |= 1;
}
- relocation = sgot->output_offset + off;
+ relocation = sgot->output_offset + off - 4;
+ addend = 0;
}
break;
+ /* Indirect .sdata relocation */
+ case (int)R_PPC_EMB_SDAI16:
+ BFD_ASSERT (sdata != NULL);
+ relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
+ sdata, h, relocation, rel,
+ R_PPC_RELATIVE);
+ break;
+
+ /* Indirect .sdata2 relocation */
+ case (int)R_PPC_EMB_SDA2I16:
+ BFD_ASSERT (sdata2 != NULL);
+ relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
+ sdata2, h, relocation, rel,
+ R_PPC_RELATIVE);
+ break;
+
/* Handle the TOC16 reloc. We want to use the offset within the .got
section, not the actual VMA. This is appropriate when generating
an embedded ELF object, for which the .got section acts like the
|| strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
|| strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
- addend -= sec->output_section->vma + 0x8000;
+ addend -= sec->output_section->vma + sec->output_offset + 0x8000;
break;
- case (int)R_PPC_ADDR16_HA: /* arithmetic adjust relocations */
- BFD_ASSERT (sec != (asection *)0);
- addend += ((relocation + addend) & 0x8000) << 1;
- break;
+ case (int)R_PPC_PLTREL24:
+ /* Relocation is to the entry for this symbol in the
+ procedure linkage table. */
+ BFD_ASSERT (h != NULL);
+
+ if (h->plt_offset == (bfd_vma) -1)
+ {
+ /* We didn't make a PLT entry for this symbol. This
+ happens when statically linking PIC code, or when
+ using -Bsymbolic. */
+ break;
+ }
- case R_PPC_SDAREL16: /* relocate against _SDA_BASE_ */
+ if (splt == NULL)
+ {
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (splt != NULL);
+ }
+
+ relocation = (splt->output_section->vma
+ + splt->output_offset
+ + h->plt_offset);
+ break;
+
+ /* relocate against _SDA_BASE_ */
+ case (int)R_PPC_SDAREL16:
BFD_ASSERT (sec != (asection *)0);
if (strcmp (bfd_get_section_name (abfd, sec), ".sdata") != 0
&& strcmp (bfd_get_section_name (abfd, sec), ".sbss") != 0)
{
- (*_bfd_error_handler) ("%s: The target of R_PPC_SDAREL16 relocations must be in section .sdata or .sbss not %s",
+ (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
bfd_get_filename (input_bfd),
+ sym_name,
+ ppc_elf_howto_table[ (int)r_type ]->name,
bfd_get_section_name (abfd, sec));
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
}
- goto unsupported;
+ addend -= (sdata->sym_hash->root.u.def.value
+ + sdata->sym_hash->root.u.def.section->output_section->vma
+ + sdata->sym_hash->root.u.def.section->output_offset);
+ break;
- case R_PPC_EMB_SDA2REL:
+
+ /* relocate against _SDA2_BASE_ */
+ case (int)R_PPC_EMB_SDA2REL:
BFD_ASSERT (sec != (asection *)0);
if (strcmp (bfd_get_section_name (abfd, sec), ".sdata2") != 0
&& strcmp (bfd_get_section_name (abfd, sec), ".sbss2") != 0)
{
- (*_bfd_error_handler) ("%s: The target of R_PPC_SDA2REL16 relocations must be in section .sdata2 or .sbss2 not %s",
+ (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
bfd_get_filename (input_bfd),
+ sym_name,
+ ppc_elf_howto_table[ (int)r_type ]->name,
bfd_get_section_name (abfd, sec));
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
}
- goto unsupported;
+ addend -= (sdata2->sym_hash->root.u.def.value
+ + sdata2->sym_hash->root.u.def.section->output_section->vma
+ + sdata2->sym_hash->root.u.def.section->output_offset);
+ break;
- case R_PPC_PLTREL24:
- case R_PPC_COPY:
- case R_PPC_GLOB_DAT:
- case R_PPC_JMP_SLOT:
- case R_PPC_RELATIVE:
- case R_PPC_LOCAL24PC:
- case R_PPC_PLT32:
- case R_PPC_PLTREL32:
- case R_PPC_PLT16_LO:
- case R_PPC_PLT16_HI:
- case R_PPC_PLT16_HA:
- case R_PPC_SECTOFF:
- case R_PPC_SECTOFF_LO:
- case R_PPC_SECTOFF_HI:
- case R_PPC_SECTOFF_HA:
- case R_PPC_EMB_NADDR32:
- case R_PPC_EMB_NADDR16:
- case R_PPC_EMB_NADDR16_LO:
- case R_PPC_EMB_NADDR16_HI:
- case R_PPC_EMB_NADDR16_HA:
- case R_PPC_EMB_SDAI16:
- case R_PPC_EMB_SDA2I16:
- case R_PPC_EMB_SDA21:
- case R_PPC_EMB_MRKREF:
- case R_PPC_EMB_RELSEC16:
- case R_PPC_EMB_RELST_LO:
- case R_PPC_EMB_RELST_HI:
- case R_PPC_EMB_RELST_HA:
- case R_PPC_EMB_BIT_FLD:
- case R_PPC_EMB_RELSDA:
- unsupported:
- (*_bfd_error_handler) ("%s: Relocation %s is not yet supported.",
+ /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
+ case (int)R_PPC_EMB_SDA21:
+ case (int)R_PPC_EMB_RELSDA:
+ {
+ const char *name = bfd_get_section_name (abfd, sec);
+ int reg;
+
+ BFD_ASSERT (sec != (asection *)0);
+ if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0)
+ {
+ reg = 13;
+ addend -= (sdata->sym_hash->root.u.def.value
+ + sdata->sym_hash->root.u.def.section->output_section->vma
+ + sdata->sym_hash->root.u.def.section->output_offset);
+ }
+
+ else if (strcmp (name, ".sdata2") == 0 || strcmp (name, ".sbss2") == 0)
+ {
+ reg = 2;
+ addend -= (sdata2->sym_hash->root.u.def.value
+ + sdata2->sym_hash->root.u.def.section->output_section->vma
+ + sdata2->sym_hash->root.u.def.section->output_offset);
+ }
+
+ else if (strcmp (name, ".PPC.EMB.sdata0") == 0 || strcmp (name, ".PPC.EMB.sbss0") == 0)
+ {
+ reg = 0;
+ }
+
+ else
+ {
+ (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
+ bfd_get_filename (input_bfd),
+ sym_name,
+ ppc_elf_howto_table[ (int)r_type ]->name,
+ bfd_get_section_name (abfd, sec));
+
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ continue;
+ }
+
+ if (r_type == R_PPC_EMB_SDA21)
+ { /* fill in register field */
+ insn = bfd_get_32 (output_bfd, contents + offset);
+ insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
+ bfd_put_32 (output_bfd, insn, contents + offset);
+ }
+ }
+ break;
+
+ /* Relocate against the beginning of the section */
+ case (int)R_PPC_SECTOFF:
+ case (int)R_PPC_SECTOFF_LO:
+ case (int)R_PPC_SECTOFF_HI:
+ BFD_ASSERT (sec != (asection *)0);
+ addend -= sec->output_section->vma;
+ break;
+
+ case (int)R_PPC_SECTOFF_HA:
+ BFD_ASSERT (sec != (asection *)0);
+ addend -= sec->output_section->vma;
+ addend += ((relocation + addend) & 0x8000) << 1;
+ break;
+
+ /* Negative relocations */
+ case (int)R_PPC_EMB_NADDR32:
+ case (int)R_PPC_EMB_NADDR16:
+ case (int)R_PPC_EMB_NADDR16_LO:
+ case (int)R_PPC_EMB_NADDR16_HI:
+ addend -= 2*relocation;
+ break;
+
+ case (int)R_PPC_EMB_NADDR16_HA:
+ addend -= 2*relocation;
+ addend += ((relocation + addend) & 0x8000) << 1;
+ break;
+
+ /* NOP relocation that prevents garbage collecting linkers from omitting a
+ reference. */
+ case (int)R_PPC_EMB_MRKREF:
+ continue;
+
+ case (int)R_PPC_COPY:
+ case (int)R_PPC_GLOB_DAT:
+ case (int)R_PPC_JMP_SLOT:
+ case (int)R_PPC_RELATIVE:
+ case (int)R_PPC_PLT32:
+ case (int)R_PPC_PLTREL32:
+ case (int)R_PPC_PLT16_LO:
+ case (int)R_PPC_PLT16_HI:
+ case (int)R_PPC_PLT16_HA:
+ case (int)R_PPC_EMB_RELSEC16:
+ case (int)R_PPC_EMB_RELST_LO:
+ case (int)R_PPC_EMB_RELST_HI:
+ case (int)R_PPC_EMB_RELST_HA:
+ case (int)R_PPC_EMB_BIT_FLD:
+ (*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.",
bfd_get_filename (input_bfd),
- ppc_elf_howto_table[ (int)r_type ]->name);
+ ppc_elf_howto_table[ (int)r_type ]->name,
+ sym_name);
- bfd_set_error (bfd_error_bad_value);
+ bfd_set_error (bfd_error_invalid_operation);
ret = false;
continue;
}
#ifdef DEBUG
- fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
+ fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
howto->name,
(int)r_type,
+ sym_name,
r_symndx,
(long)offset,
(long)addend);
#define ELF_MACHINE_ALT2 EM_PPC_OLD
#endif
+#define elf_backend_plt_not_loaded 1
+#define elf_backend_got_symbol_offset 4
+
#define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
#define elf_backend_check_relocs ppc_elf_check_relocs
#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
+#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
#define elf_backend_fake_sections ppc_elf_fake_sections
+#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
+#define elf_backend_modify_segment_map ppc_elf_modify_segment_map
#include "elf32-target.h"
projects / binutils-gdb.git / blobdiff