#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/frv.h"
+#include "hashtab.h"
/* Forward declarations. */
static bfd_reloc_status_type elf32_frv_relocate_lo16
0xffff, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
+
+ /* A 12-bit signed operand with the GOT offset for the address of
+ the symbol. */
+ HOWTO (R_FRV_GOT12, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_GOT12", /* name */
+ FALSE, /* partial_inplace */
+ 0xfff, /* src_mask */
+ 0xfff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The upper 16 bits of the GOT offset for the address of the
+ symbol. */
+ HOWTO (R_FRV_GOTHI, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_GOTHI", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The lower 16 bits of the GOT offset for the address of the
+ symbol. */
+ HOWTO (R_FRV_GOTLO, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_GOTLO", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The 32-bit address of the canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 12-bit signed operand with the GOT offset for the address of
+ canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_GOT12, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_GOT12", /* name */
+ FALSE, /* partial_inplace */
+ 0xfff, /* src_mask */
+ 0xfff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The upper 16 bits of the GOT offset for the address of the
+ canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_GOTHI, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_GOTHI", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The lower 16 bits of the GOT offset for the address of the
+ canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_GOTLO, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_GOTLO", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The 32-bit address of the canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_VALUE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 64, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_VALUE", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 12-bit signed operand with the GOT offset for the address of
+ canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_GOTOFF12, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_GOTOFF12", /* name */
+ FALSE, /* partial_inplace */
+ 0xfff, /* src_mask */
+ 0xfff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The upper 16 bits of the GOT offset for the address of the
+ canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_GOTOFFHI, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_GOTOFFHI", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The lower 16 bits of the GOT offset for the address of the
+ canonical descriptor of a function. */
+ HOWTO (R_FRV_FUNCDESC_GOTOFFLO, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_GOTOFFLO", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 12-bit signed operand with the GOT offset for the address of
+ the symbol. */
+ HOWTO (R_FRV_GOTOFF12, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_GOTOFF12", /* name */
+ FALSE, /* partial_inplace */
+ 0xfff, /* src_mask */
+ 0xfff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The upper 16 bits of the GOT offset for the address of the
+ symbol. */
+ HOWTO (R_FRV_GOTOFFHI, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_GOTOFFHI", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The lower 16 bits of the GOT offset for the address of the
+ symbol. */
+ HOWTO (R_FRV_GOTOFFLO, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_GOTOFFLO", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
};
/* GNU extension to record C++ vtable hierarchy. */
0, /* src_mask */
0, /* dst_mask */
FALSE); /* pcrel_offset */
+
+/* The following 3 relocations are REL. The only difference to the
+ entries in the table above are that partial_inplace is TRUE. */
+static reloc_howto_type elf32_frv_rel_32_howto =
+ HOWTO (R_FRV_32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_32", /* name */
+ TRUE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE); /* pcrel_offset */
+
+static reloc_howto_type elf32_frv_rel_funcdesc_howto =
+ HOWTO (R_FRV_FUNCDESC, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC", /* name */
+ TRUE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE); /* pcrel_offset */
+
+static reloc_howto_type elf32_frv_rel_funcdesc_value_howto =
+ HOWTO (R_FRV_FUNCDESC_VALUE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 64, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_FRV_FUNCDESC_VALUE", /* name */
+ TRUE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE); /* pcrel_offset */
+
\f
/* Map BFD reloc types to FRV ELF reloc types. */
#if 0
{ BFD_RELOC_FRV_GPREL32, R_FRV_GPREL32 },
{ BFD_RELOC_FRV_GPRELHI, R_FRV_GPRELHI },
{ BFD_RELOC_FRV_GPRELLO, R_FRV_GPRELLO },
+ { BFD_RELOC_FRV_GOT12, R_FRV_GOT12 },
+ { BFD_RELOC_FRV_GOTHI, R_FRV_GOTHI },
+ { BFD_RELOC_FRV_GOTLO, R_FRV_GOTLO },
+ { BFD_RELOC_FRV_FUNCDESC, R_FRV_FUNCDESC },
+ { BFD_RELOC_FRV_FUNCDESC_GOT12, R_FRV_FUNCDESC_GOT12 },
+ { BFD_RELOC_FRV_FUNCDESC_GOTHI, R_FRV_FUNCDESC_GOTHI },
+ { BFD_RELOC_FRV_FUNCDESC_GOTLO, R_FRV_FUNCDESC_GOTLO },
+ { BFD_RELOC_FRV_FUNCDESC_VALUE, R_FRV_FUNCDESC_VALUE },
+ { BFD_RELOC_FRV_FUNCDESC_GOTOFF12, R_FRV_FUNCDESC_GOTOFF12 },
+ { BFD_RELOC_FRV_FUNCDESC_GOTOFFHI, R_FRV_FUNCDESC_GOTOFFHI },
+ { BFD_RELOC_FRV_FUNCDESC_GOTOFFLO, R_FRV_FUNCDESC_GOTOFFLO },
+ { BFD_RELOC_FRV_GOTOFF12, R_FRV_GOTOFF12 },
+ { BFD_RELOC_FRV_GOTOFFHI, R_FRV_GOTOFFHI },
+ { BFD_RELOC_FRV_GOTOFFLO, R_FRV_GOTOFFLO },
{ BFD_RELOC_VTABLE_INHERIT, R_FRV_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_FRV_GNU_VTENTRY },
};
#endif
-/* Handle an FRV small data reloc. */
-static bfd_reloc_status_type
-elf32_frv_relocate_gprel12 (info, input_bfd, input_section, relocation,
- contents, value)
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- Elf_Internal_Rela *relocation;
- bfd_byte *contents;
- bfd_vma value;
+/* An extension of the elf hash table data structure, containing some
+ additional FRV-specific data. */
+struct frv_elf_link_hash_table
{
- bfd_vma insn;
- bfd_vma gp;
- struct bfd_link_hash_entry *h;
-
- h = bfd_link_hash_lookup (info->hash, "_gp", FALSE, FALSE, TRUE);
+ struct elf_link_hash_table elf;
+
+ /* A pointer to the .got section. */
+ asection *sgot;
+ /* A pointer to the .rel.got section. */
+ asection *sgotrel;
+ /* A pointer to the .rofixup section. */
+ asection *sgotfixup;
+ /* A pointer to the .plt section. */
+ asection *splt;
+ /* A pointer to the .rel.plt section. */
+ asection *spltrel;
+ /* GOT base offset. */
+ bfd_vma got0;
+ /* Location of the first non-lazy PLT entry, i.e., the number of
+ bytes taken by lazy PLT entries. */
+ bfd_vma plt0;
+ /* A hash table holding information about which symbols were
+ referenced with which PIC-related relocations. */
+ struct htab *relocs_info;
+};
- gp = (h->u.def.value
- + h->u.def.section->output_section->vma
- + h->u.def.section->output_offset);
+/* Get the FRV ELF linker hash table from a link_info structure. */
+
+#define frv_hash_table(info) \
+ ((struct frv_elf_link_hash_table *) ((info)->hash))
+
+#define frv_got_section(info) \
+ (frv_hash_table (info)->sgot)
+#define frv_gotrel_section(info) \
+ (frv_hash_table (info)->sgotrel)
+#define frv_gotfixup_section(info) \
+ (frv_hash_table (info)->sgotfixup)
+#define frv_plt_section(info) \
+ (frv_hash_table (info)->splt)
+#define frv_pltrel_section(info) \
+ (frv_hash_table (info)->spltrel)
+#define frv_relocs_info(info) \
+ (frv_hash_table (info)->relocs_info)
+#define frv_got_initial_offset(info) \
+ (frv_hash_table (info)->got0)
+#define frv_plt_initial_offset(info) \
+ (frv_hash_table (info)->plt0)
+
+/* Create an FRV ELF linker hash table. */
+
+static struct bfd_link_hash_table *
+frv_elf_link_hash_table_create (bfd *abfd)
+{
+ struct frv_elf_link_hash_table *ret;
+ bfd_size_type amt = sizeof (struct frv_elf_link_hash_table);
- value -= input_section->output_section->vma;
- value -= (gp - input_section->output_section->vma);
+ ret = bfd_zalloc (abfd, amt);
+ if (ret == NULL)
+ return NULL;
- insn = bfd_get_32 (input_bfd, contents + relocation->r_offset);
+ if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
+ _bfd_elf_link_hash_newfunc))
+ {
+ free (ret);
+ return NULL;
+ }
- value += relocation->r_addend;
+ return &ret->elf.root;
+}
- if ((long) value > 0x7ff || (long) value < -0x800)
- return bfd_reloc_overflow;
+/* Decide whether a reference to a symbol can be resolved locally or
+ not. If the symbol is protected, we want the local address, but
+ its function descriptor must be assigned by the dynamic linker. */
+#define FRV_SYM_LOCAL(INFO, H) \
+ (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
+ || ! elf_hash_table (INFO)->dynamic_sections_created \
+ || (H)->root.type == bfd_link_hash_undefweak \
+ || (/* The condition below is an ugly hack to get .scommon data to
+ be regarded as local. For some reason the
+ ELF_LINK_HASH_DEF_REGULAR bit is not set on such common
+ symbols, and the SEC_IS_COMMON bit is not set any longer
+ when we need to perform this test. Hopefully this
+ approximation is good enough. */ \
+ ((H)->root.type == bfd_link_hash_defined \
+ || (H)->root.type == bfd_link_hash_defweak) \
+ && (H)->root.u.def.section->output_section \
+ && ((H)->root.u.def.section->flags & SEC_LINKER_CREATED)))
+#define FRV_FUNCDESC_LOCAL(INFO, H) \
+ ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
+
+/* This structure collects information on what kind of GOT, PLT or
+ function descriptors are required by relocations that reference a
+ certain symbol. */
+struct frv_pic_relocs_info
+{
+ /* The index of the symbol, as stored in the relocation r_info, if
+ we have a local symbol; -1 otherwise. */
+ long symndx;
+ union
+ {
+ /* The input bfd in which the symbol is defined, if it's a local
+ symbol. */
+ bfd *abfd;
+ /* If symndx == -1, the hash table entry corresponding to a global
+ symbol (even if it turns out to bind locally, in which case it
+ should ideally be replaced with section's symndx + addend). */
+ struct elf_link_hash_entry *h;
+ } d;
+ /* The addend of the relocation that references the symbol. */
+ bfd_vma addend;
+
+ /* The fields above are used to identify an entry. The fields below
+ contain information on how an entry is used and, later on, which
+ locations it was assigned. */
+ /* The following 3 fields record whether the symbol+addend above was
+ ever referenced with a GOT relocation. The 12 suffix indicates a
+ GOT12 relocation; los is used for GOTLO relocations that are not
+ matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
+ pairs. */
+ unsigned got12:1;
+ unsigned gotlos:1;
+ unsigned gothilo:1;
+ /* Whether a FUNCDESC relocation references symbol+addend. */
+ unsigned fd:1;
+ /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
+ unsigned fdgot12:1;
+ unsigned fdgotlos:1;
+ unsigned fdgothilo:1;
+ /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
+ unsigned fdgoff12:1;
+ unsigned fdgofflos:1;
+ unsigned fdgoffhilo:1;
+ /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
+ GOTOFFHI relocations. The addend doesn't really matter, since we
+ envision that this will only be used to check whether the symbol
+ is mapped to the same segment as the got. */
+ unsigned gotoff:1;
+ /* Whether symbol+addend is referenced by a LABEL24 relocation. */
+ unsigned call:1;
+ /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
+ relocation. */
+ unsigned sym:1;
+ /* Whether we need a PLT entry for a symbol. Should be implied by
+ something like:
+ (call && symndx == -1 && ! FRV_SYM_LOCAL (info, d.h)) */
+ unsigned plt:1;
+ /* Whether a function descriptor should be created in this link unit
+ for symbol+addend. Should be implied by something like:
+ (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
+ || ((fd || fdgot12 || fdgotlos || fdgothilo)
+ && (symndx != -1 || FRV_FUNCDESC_LOCAL (info, d.h)))) */
+ unsigned privfd:1;
+ /* Whether a lazy PLT entry is needed for this symbol+addend.
+ Should be implied by something like:
+ (privfd && symndx == -1 && ! FRV_SYM_LOCAL (info, d.h)
+ && ! (info->flags & DF_BIND_NOW)) */
+ unsigned lazyplt:1;
+ /* Whether we've already emitted GOT relocations and PLT entries as
+ needed for this symbol. */
+ unsigned done:1;
+
+ /* The number of R_FRV_32, R_FRV_FUNCDESC and R_FRV_FUNCDESC_VALUE
+ relocations referencing the symbol. */
+ unsigned relocs32, relocsfd, relocsfdv;
+
+ /* The offsets of the GOT entries assigned to symbol+addend, to the
+ function descriptor's address, and to a function descriptor,
+ respectively. Should be zero if unassigned. The offsets are
+ counted from the value that will be assigned to the PIC register,
+ not from the beginning of the .got section. */
+ bfd_signed_vma got_entry, fdgot_entry, fd_entry;
+ /* The offsets of the PLT entries assigned to symbol+addend,
+ non-lazy and lazy, respectively. If unassigned, should be
+ (bfd_vma)-1. */
+ bfd_vma plt_entry, lzplt_entry;
+};
- bfd_put_32 (input_bfd,
- (insn & 0xfffff000) | (value & 0xfff),
- contents + relocation->r_offset);
+/* Compute a hash with the key fields of an frv_pic_relocs_info entry. */
+static hashval_t
+frv_pic_relocs_info_hash (const void *entry_)
+{
+ const struct frv_pic_relocs_info *entry = entry_;
- return bfd_reloc_ok;
+ return (entry->symndx == -1
+ ? entry->d.h->root.root.hash
+ : entry->symndx + entry->d.abfd->id * 257) + entry->addend;
}
-/* Handle an FRV small data reloc. for the u12 field. */
+/* Test whether the key fields of two frv_pic_relocs_info entries are
+ identical. */
+static int
+frv_pic_relocs_info_eq (const void *entry1, const void *entry2)
+{
+ const struct frv_pic_relocs_info *e1 = entry1;
+ const struct frv_pic_relocs_info *e2 = entry2;
-static bfd_reloc_status_type
-elf32_frv_relocate_gprelu12 (info, input_bfd, input_section, relocation,
- contents, value)
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- Elf_Internal_Rela *relocation;
- bfd_byte *contents;
- bfd_vma value;
+ return e1->symndx == e2->symndx && e1->addend == e2->addend
+ && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
+}
+
+/* Find or create an entry in a hash table HT that matches the key
+ fields of the given ENTRY. If it's not found, memory for a new
+ entry is allocated in ABFD's obstack. */
+static struct frv_pic_relocs_info *
+frv_pic_relocs_info_find (struct htab *ht,
+ bfd *abfd,
+ const struct frv_pic_relocs_info *entry)
{
- bfd_vma insn;
- bfd_vma gp;
- struct bfd_link_hash_entry *h;
- bfd_vma mask;
+ struct frv_pic_relocs_info **loc =
+ (struct frv_pic_relocs_info **) htab_find_slot (ht, entry, INSERT);
- h = bfd_link_hash_lookup (info->hash, "_gp", FALSE, FALSE, TRUE);
+ if (*loc)
+ return *loc;
- gp = (h->u.def.value
- + h->u.def.section->output_section->vma
- + h->u.def.section->output_offset);
+ *loc = bfd_zalloc (abfd, sizeof (**loc));
- value -= input_section->output_section->vma;
- value -= (gp - input_section->output_section->vma);
+ if (! *loc)
+ return *loc;
+
+ (*loc)->symndx = entry->symndx;
+ (*loc)->d = entry->d;
+ (*loc)->addend = entry->addend;
+ (*loc)->plt_entry = (bfd_vma)-1;
+ (*loc)->lzplt_entry = (bfd_vma)-1;
+
+ return *loc;
+}
+
+/* Obtain the address of the entry in HT associated with H's symbol +
+ addend, creating a new entry if none existed. ABFD is only used
+ for memory allocation purposes. */
+inline static struct frv_pic_relocs_info *
+frv_pic_relocs_info_for_global (struct htab *ht,
+ bfd *abfd,
+ struct elf_link_hash_entry *h,
+ bfd_vma addend)
+{
+ struct frv_pic_relocs_info entry;
+
+ entry.symndx = -1;
+ entry.d.h = h;
+ entry.addend = addend;
+
+ return frv_pic_relocs_info_find (ht, abfd, &entry);
+}
+
+/* Obtain the address of the entry in HT associated with the SYMNDXth
+ local symbol of the input bfd ABFD, plus the addend, creating a new
+ entry if none existed. */
+inline static struct frv_pic_relocs_info *
+frv_pic_relocs_info_for_local (struct htab *ht,
+ bfd *abfd,
+ long symndx,
+ bfd_vma addend)
+{
+ struct frv_pic_relocs_info entry;
+
+ entry.symndx = symndx;
+ entry.d.abfd = abfd;
+ entry.addend = addend;
+
+ return frv_pic_relocs_info_find (ht, abfd, &entry);
+}
+
+/* Every block of 65535 lazy PLT entries shares a single call to the
+ resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
+ 32767, counting from 0). All other lazy PLT entries branch to it
+ in a single instruction. */
+
+#define FRV_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
+#define FRV_LZPLT_RESOLV_LOC (8 * 32767)
+
+/* Add a dynamic relocation to the SRELOC section. */
+
+inline static bfd_vma
+_frv_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
+ int reloc_type, long dynindx, bfd_vma addend)
+{
+ Elf_Internal_Rela outrel;
+ bfd_vma reloc_offset;
+
+ outrel.r_offset = offset;
+ outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
+ outrel.r_addend = addend;
+
+ reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
+ BFD_ASSERT (reloc_offset < sreloc->_raw_size);
+ bfd_elf32_swap_reloc_out (output_bfd, &outrel,
+ sreloc->contents + reloc_offset);
+ sreloc->reloc_count++;
+
+ return reloc_offset;
+}
+
+/* Add a fixup to the ROFIXUP section. */
+
+static bfd_vma
+_frv_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset)
+{
+ bfd_vma fixup_offset;
+
+ if (rofixup->flags & SEC_EXCLUDE)
+ return -1;
+
+ fixup_offset = rofixup->reloc_count * 4;
+ if (rofixup->contents)
+ {
+ BFD_ASSERT (fixup_offset < rofixup->_raw_size);
+ bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
+ }
+ rofixup->reloc_count++;
+
+ return fixup_offset;
+}
+
+/* Find the segment number in which OSEC, and output section, is
+ located. */
+
+static unsigned
+_frv_osec_to_segment (bfd *output_bfd, asection *osec)
+{
+ struct elf_segment_map *m;
+ Elf_Internal_Phdr *p;
+
+ /* Find the segment that contains the output_section. */
+ for (m = elf_tdata (output_bfd)->segment_map,
+ p = elf_tdata (output_bfd)->phdr;
+ m != NULL;
+ m = m->next, p++)
+ {
+ int i;
+
+ for (i = m->count - 1; i >= 0; i--)
+ if (m->sections[i] == osec)
+ break;
+
+ if (i >= 0)
+ break;
+ }
+
+ return p - elf_tdata (output_bfd)->phdr;
+}
+
+inline static bfd_boolean
+_frv_osec_readonly_p (bfd *output_bfd, asection *osec)
+{
+ unsigned seg = _frv_osec_to_segment (output_bfd, osec);
+
+ return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
+}
+
+/* Generate relocations for GOT entries, function descriptors, and
+ code for PLT and lazy PLT entries. */
+
+inline static bfd_boolean
+_frv_emit_got_relocs_plt_entries (struct frv_pic_relocs_info *entry,
+ bfd *output_bfd,
+ struct bfd_link_info *info,
+ asection *sec,
+ Elf_Internal_Sym *sym,
+ bfd_vma addend)
+
+{
+ bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
+ int dynindx = -1;
+
+ if (entry->done)
+ return TRUE;
+ entry->done = 1;
+
+ if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
+ {
+ /* If the symbol is dynamic, consider it for dynamic
+ relocations, otherwise decay to section + offset. */
+ if (entry->symndx == -1 && entry->d.h->dynindx != -1)
+ dynindx = entry->d.h->dynindx;
+ else
+ {
+ if (sec->output_section
+ && ! bfd_is_abs_section (sec->output_section)
+ && ! bfd_is_und_section (sec->output_section))
+ dynindx = elf_section_data (sec->output_section)->dynindx;
+ else
+ dynindx = 0;
+ }
+ }
+
+ /* Generate relocation for GOT entry pointing to the symbol. */
+ if (entry->got_entry)
+ {
+ int idx = dynindx;
+ bfd_vma ad = addend;
+
+ /* If the symbol is dynamic but binds locally, use
+ section+offset. */
+ if (sec && (entry->symndx != -1 || FRV_SYM_LOCAL (info, entry->d.h)))
+ {
+ if (entry->symndx == -1)
+ ad += entry->d.h->root.u.def.value;
+ else
+ ad += sym->st_value;
+ ad += sec->output_offset;
+ if (sec->output_section && elf_section_data (sec->output_section))
+ idx = elf_section_data (sec->output_section)->dynindx;
+ else
+ idx = 0;
+ }
+
+ /* If we're linking an executable at a fixed address, we can
+ omit the dynamic relocation as long as the symbol is local to
+ this module. */
+ if (info->executable && !info->pie
+ && (entry->symndx != -1 || FRV_SYM_LOCAL (info, entry->d.h)))
+ {
+ if (sec)
+ ad += sec->output_section->vma;
+ if (entry->symndx != -1 ||
+ entry->d.h->root.type != bfd_link_hash_undefweak)
+ _frv_add_rofixup (output_bfd, frv_gotfixup_section (info),
+ frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info)
+ + entry->got_entry);
+ }
+ else
+ _frv_add_dyn_reloc (output_bfd, frv_gotrel_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ frv_got_section (info),
+ frv_got_initial_offset (info)
+ + entry->got_entry)
+ + frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset,
+ R_FRV_32, idx, ad);
+
+ bfd_put_32 (output_bfd, ad,
+ frv_got_section (info)->contents
+ + frv_got_initial_offset (info)
+ + entry->got_entry);
+ }
+
+ /* Generate relocation for GOT entry pointing to a canonical
+ function descriptor. */
+ if (entry->fdgot_entry)
+ {
+ int reloc, idx;
+ bfd_vma ad;
+
+ /* If the symbol is dynamic and there may be dynamic symbol
+ resolution because we are or are linked with a shared
+ library, emit a FUNCDESC relocation such that the dynamic
+ linker will allocate the function descriptor. */
+ if (entry->symndx == -1 && ! FRV_FUNCDESC_LOCAL (info, entry->d.h))
+ {
+ reloc = R_FRV_FUNCDESC;
+ idx = dynindx;
+ ad = addend;
+ if (ad)
+ return FALSE;
+ }
+ else
+ {
+ /* Otherwise, we know we have a private function descriptor,
+ so reference it directly. */
+ if (elf_hash_table (info)->dynamic_sections_created)
+ BFD_ASSERT (entry->privfd);
+ reloc = R_FRV_32;
+ idx = elf_section_data (frv_got_section (info)->output_section)
+ ->dynindx;
+ ad = frv_got_section (info)->output_offset +
+ frv_got_initial_offset (info) + entry->fd_entry;
+ }
+
+ /* If there is room for dynamic symbol resolution, emit the
+ dynamic relocation. However, if we're linking an executable
+ at a fixed location, we won't have emitted a dynamic symbol
+ entry for the got section, so idx will be zero, which means
+ we can and should compute the address of the private
+ descriptor ourselves. */
+ if (info->executable && !info->pie
+ && (entry->symndx != -1 || FRV_FUNCDESC_LOCAL (info, entry->d.h)))
+ {
+ if (entry->symndx == -1
+ && entry->d.h->root.type == bfd_link_hash_undefweak)
+ ad = 0;
+ else
+ {
+ ad += frv_got_section (info)->output_section->vma;
+ _frv_add_rofixup (output_bfd, frv_gotfixup_section (info),
+ frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info)
+ + entry->fdgot_entry);
+ }
+ }
+ else
+ _frv_add_dyn_reloc (output_bfd, frv_gotrel_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ frv_got_section (info),
+ frv_got_initial_offset (info)
+ + entry->fdgot_entry)
+ + frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset,
+ reloc, idx, ad);
+
+ bfd_put_32 (output_bfd, ad,
+ frv_got_section (info)->contents
+ + frv_got_initial_offset (info)
+ + entry->fdgot_entry);
+ }
+
+ /* Generate relocation to fill in a private function descriptor in
+ the GOT. */
+ if (entry->fd_entry)
+ {
+ int idx = dynindx;
+ bfd_vma ad = addend;
+ bfd_vma ofst;
+ long lowword, highword;
+
+ /* If the symbol is dynamic but binds locally, use
+ section+offset. */
+ if (sec && (entry->symndx != -1 || FRV_SYM_LOCAL (info, entry->d.h)))
+ {
+ if (entry->symndx == -1)
+ ad += entry->d.h->root.u.def.value;
+ else
+ ad += sym->st_value;
+ ad += sec->output_offset;
+ if (sec->output_section && elf_section_data (sec->output_section))
+ idx = elf_section_data (sec->output_section)->dynindx;
+ else
+ idx = 0;
+ }
+
+ /* If we're linking an executable at a fixed address, we can
+ omit the dynamic relocation as long as the symbol is local to
+ this module. */
+ if (info->executable && !info->pie
+ && (entry->symndx != -1 || FRV_SYM_LOCAL (info, entry->d.h)))
+ {
+ if (sec)
+ ad += sec->output_section->vma;
+ ofst = 0;
+ if (entry->symndx != -1 ||
+ entry->d.h->root.type != bfd_link_hash_undefweak)
+ {
+ _frv_add_rofixup (output_bfd, frv_gotfixup_section (info),
+ frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info)
+ + entry->fd_entry);
+ _frv_add_rofixup (output_bfd, frv_gotfixup_section (info),
+ frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info)
+ + entry->fd_entry + 4);
+ }
+ }
+ else
+ {
+ ofst =
+ _frv_add_dyn_reloc (output_bfd,
+ entry->lazyplt ? frv_pltrel_section (info)
+ : frv_gotrel_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ frv_got_section (info),
+ frv_got_initial_offset (info)
+ + entry->fd_entry)
+ + frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset,
+ R_FRV_FUNCDESC_VALUE, idx, ad);
+ }
+
+ /* If we've omitted the dynamic relocation, just emit the fixed
+ addresses of the symbol and of the local GOT base offset. */
+ if (info->executable && !info->pie && sec && sec->output_section)
+ {
+ lowword = ad;
+ highword = frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info);
+ }
+ else if (entry->lazyplt)
+ {
+ if (ad)
+ return FALSE;
+
+ fd_lazy_rel_offset = ofst;
+
+ /* A function descriptor used for lazy or local resolving is
+ initialized such that its high word contains the output
+ section index in which the PLT entries are located, and
+ the low word contains the address of the lazy PLT entry
+ entry point, that must be within the memory region
+ assigned to that section. */
+ lowword = entry->lzplt_entry + 4
+ + frv_plt_section (info)->output_offset
+ + frv_plt_section (info)->output_section->vma;
+ highword = _frv_osec_to_segment
+ (output_bfd, frv_plt_section (info)->output_section);
+ }
+ else
+ {
+ /* A function descriptor for a local function gets the index
+ of the section. For a non-local function, it's
+ disregarded. */
+ lowword = ad;
+ if (entry->symndx == -1 && entry->d.h->dynindx != -1
+ && entry->d.h->dynindx == idx)
+ highword = 0;
+ else
+ highword = _frv_osec_to_segment (output_bfd, sec->output_section);
+ }
+
+ bfd_put_32 (output_bfd, lowword,
+ frv_got_section (info)->contents
+ + frv_got_initial_offset (info)
+ + entry->fd_entry);
+ bfd_put_32 (output_bfd, highword,
+ frv_got_section (info)->contents
+ + frv_got_initial_offset (info)
+ + entry->fd_entry + 4);
+ }
+
+ /* Generate code for the PLT entry. */
+ if (entry->plt_entry != (bfd_vma) -1)
+ {
+ bfd_byte *plt_code = frv_plt_section (info)->contents + entry->plt_entry;
+
+ BFD_ASSERT (entry->fd_entry);
+
+ /* Figure out what kind of PLT entry we need, depending on the
+ location of the function descriptor within the GOT. */
+ if (entry->fd_entry >= -(1 << (12 - 1))
+ && entry->fd_entry < (1 << (12 - 1)))
+ {
+ /* lddi @(gr15, fd_entry), gr14 */
+ bfd_put_32 (output_bfd,
+ 0x9cccf000 | (entry->fd_entry & ((1 << 12) - 1)),
+ plt_code);
+ plt_code += 4;
+ }
+ else
+ {
+ if (entry->fd_entry >= -(1 << (16 - 1))
+ && entry->fd_entry < (1 << (16 - 1)))
+ {
+ /* setlos lo(fd_entry), gr14 */
+ bfd_put_32 (output_bfd,
+ 0x9cfc0000
+ | (entry->fd_entry & (((bfd_vma)1 << 16) - 1)),
+ plt_code);
+ plt_code += 4;
+ }
+ else
+ {
+ /* sethi.p hi(fd_entry), gr14
+ setlo lo(fd_entry), gr14 */
+ bfd_put_32 (output_bfd,
+ 0x1cf80000
+ | ((entry->fd_entry >> 16)
+ & (((bfd_vma)1 << 16) - 1)),
+ plt_code);
+ bfd_put_32 (output_bfd,
+ 0x9cf40000
+ | (entry->fd_entry & (((bfd_vma)1 << 16) - 1)),
+ plt_code);
+ plt_code += 8;
+ }
+ /* ldd @(gr14,gr15),gr14 */
+ bfd_put_32 (output_bfd, 0x9c08e14f, plt_code);
+ plt_code += 4;
+ }
+ /* jmpl @(gr14,gr0) */
+ bfd_put_32 (output_bfd, 0x8030e000, plt_code);
+ }
+
+ /* Generate code for the lazy PLT entry. */
+ if (entry->lzplt_entry != (bfd_vma) -1)
+ {
+ bfd_byte *lzplt_code = frv_plt_section (info)->contents
+ + entry->lzplt_entry;
+ bfd_vma resolverStub_addr;
+
+ bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
+ lzplt_code += 4;
+
+ resolverStub_addr = entry->lzplt_entry / FRV_LZPLT_BLOCK_SIZE
+ * FRV_LZPLT_BLOCK_SIZE + FRV_LZPLT_RESOLV_LOC;
+ if (resolverStub_addr >= frv_plt_initial_offset (info))
+ resolverStub_addr = frv_plt_initial_offset (info) - 12;
+
+ if (entry->lzplt_entry == resolverStub_addr)
+ {
+ /* This is a lazy PLT entry that includes a resolver call. */
+ /* ldd @(gr15,gr0), gr4
+ jmpl @(gr4,gr0) */
+ bfd_put_32 (output_bfd, 0x8808f140, lzplt_code);
+ bfd_put_32 (output_bfd, 0x80304000, lzplt_code + 4);
+ }
+ else
+ {
+ /* bra resolverStub */
+ bfd_put_32 (output_bfd,
+ 0xc01a0000
+ | (((resolverStub_addr - entry->lzplt_entry)
+ / 4) & (((bfd_vma)1 << 16) - 1)),
+ lzplt_code);
+ }
+ }
+
+ return TRUE;
+}
+
+/* Handle an FRV small data reloc. */
+
+static bfd_reloc_status_type
+elf32_frv_relocate_gprel12 (info, input_bfd, input_section, relocation,
+ contents, value)
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ Elf_Internal_Rela *relocation;
+ bfd_byte *contents;
+ bfd_vma value;
+{
+ bfd_vma insn;
+ bfd_vma gp;
+ struct bfd_link_hash_entry *h;
+
+ h = bfd_link_hash_lookup (info->hash, "_gp", FALSE, FALSE, TRUE);
+
+ gp = (h->u.def.value
+ + h->u.def.section->output_section->vma
+ + h->u.def.section->output_offset);
+
+ value -= input_section->output_section->vma;
+ value -= (gp - input_section->output_section->vma);
+
+ insn = bfd_get_32 (input_bfd, contents + relocation->r_offset);
+
+ value += relocation->r_addend;
+
+ if ((long) value > 0x7ff || (long) value < -0x800)
+ return bfd_reloc_overflow;
+
+ bfd_put_32 (input_bfd,
+ (insn & 0xfffff000) | (value & 0xfff),
+ contents + relocation->r_offset);
+
+ return bfd_reloc_ok;
+}
+
+/* Handle an FRV small data reloc. for the u12 field. */
+
+static bfd_reloc_status_type
+elf32_frv_relocate_gprelu12 (info, input_bfd, input_section, relocation,
+ contents, value)
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ Elf_Internal_Rela *relocation;
+ bfd_byte *contents;
+ bfd_vma value;
+{
+ bfd_vma insn;
+ bfd_vma gp;
+ struct bfd_link_hash_entry *h;
+ bfd_vma mask;
+
+ h = bfd_link_hash_lookup (info->hash, "_gp", FALSE, FALSE, TRUE);
+
+ gp = (h->u.def.value
+ + h->u.def.section->output_section->vma
+ + h->u.def.section->output_offset);
+
+ value -= input_section->output_section->vma;
+ value -= (gp - input_section->output_section->vma);
insn = bfd_get_32 (input_bfd, contents + relocation->r_offset);
return &elf32_frv_howto_table[ (int) R_FRV_NONE];
case BFD_RELOC_32:
+ if (elf_elfheader (abfd)->e_type == ET_EXEC
+ || elf_elfheader (abfd)->e_type == ET_DYN)
+ return &elf32_frv_rel_32_howto;
+ /* Fall through. */
case BFD_RELOC_CTOR:
return &elf32_frv_howto_table[ (int) R_FRV_32];
case BFD_RELOC_FRV_GPRELLO:
return &elf32_frv_howto_table[ (int) R_FRV_GPRELLO];
+ case BFD_RELOC_FRV_GOT12:
+ return &elf32_frv_howto_table[ (int) R_FRV_GOT12];
+
+ case BFD_RELOC_FRV_GOTHI:
+ return &elf32_frv_howto_table[ (int) R_FRV_GOTHI];
+
+ case BFD_RELOC_FRV_GOTLO:
+ return &elf32_frv_howto_table[ (int) R_FRV_GOTLO];
+
+ case BFD_RELOC_FRV_FUNCDESC:
+ if (elf_elfheader (abfd)->e_type == ET_EXEC
+ || elf_elfheader (abfd)->e_type == ET_DYN)
+ return &elf32_frv_rel_funcdesc_howto;
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC];
+
+ case BFD_RELOC_FRV_FUNCDESC_GOT12:
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_GOT12];
+
+ case BFD_RELOC_FRV_FUNCDESC_GOTHI:
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_GOTHI];
+
+ case BFD_RELOC_FRV_FUNCDESC_GOTLO:
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_GOTLO];
+
+ case BFD_RELOC_FRV_FUNCDESC_VALUE:
+ if (elf_elfheader (abfd)->e_type == ET_EXEC
+ || elf_elfheader (abfd)->e_type == ET_DYN)
+ return &elf32_frv_rel_funcdesc_value_howto;
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_VALUE];
+
+ case BFD_RELOC_FRV_FUNCDESC_GOTOFF12:
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_GOTOFF12];
+
+ case BFD_RELOC_FRV_FUNCDESC_GOTOFFHI:
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_GOTOFFHI];
+
+ case BFD_RELOC_FRV_FUNCDESC_GOTOFFLO:
+ return &elf32_frv_howto_table[ (int) R_FRV_FUNCDESC_GOTOFFLO];
+
+ case BFD_RELOC_FRV_GOTOFF12:
+ return &elf32_frv_howto_table[ (int) R_FRV_GOTOFF12];
+
+ case BFD_RELOC_FRV_GOTOFFHI:
+ return &elf32_frv_howto_table[ (int) R_FRV_GOTOFFHI];
+
+ case BFD_RELOC_FRV_GOTOFFLO:
+ return &elf32_frv_howto_table[ (int) R_FRV_GOTOFFLO];
+
case BFD_RELOC_VTABLE_INHERIT:
return &elf32_frv_vtinherit_howto;
break;
}
}
+
+/* Set the howto pointer for an FRV ELF REL reloc. */
+static void
+frv_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *cache_ptr, Elf_Internal_Rela *dst)
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ switch (r_type)
+ {
+ case R_FRV_32:
+ cache_ptr->howto = &elf32_frv_rel_32_howto;
+ break;
+
+ case R_FRV_FUNCDESC:
+ cache_ptr->howto = &elf32_frv_rel_funcdesc_howto;
+ break;
+
+ case R_FRV_FUNCDESC_VALUE:
+ cache_ptr->howto = &elf32_frv_rel_funcdesc_value_howto;
+ break;
+
+ default:
+ cache_ptr->howto = NULL;
+ break;
+ }
+}
\f
/* Perform a single relocation. By default we use the standard BFD
routines, but a few relocs, we have to do them ourselves. */
struct elf_link_hash_entry **sym_hashes;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
+ unsigned isec_segment, got_segment, plt_segment, gprel_segment,
+ check_segment[2];
+ int silence_segment_error = !(info->shared || info->pie);
if (info->relocatable)
return TRUE;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
+ isec_segment = _frv_osec_to_segment (output_bfd,
+ input_section->output_section);
+ if (frv_got_section (info))
+ got_segment = _frv_osec_to_segment (output_bfd,
+ frv_got_section (info)
+ ->output_section);
+ else
+ got_segment = -1;
+ if (frv_gotfixup_section (info))
+ gprel_segment = _frv_osec_to_segment (output_bfd,
+ frv_gotfixup_section (info)
+ ->output_section);
+ else
+ gprel_segment = -1;
+ if (elf_hash_table (info)->dynamic_sections_created)
+ plt_segment = _frv_osec_to_segment (output_bfd,
+ frv_plt_section (info)
+ ->output_section);
+ else
+ plt_segment = -1;
+
for (rel = relocs; rel < relend; rel ++)
{
reloc_howto_type *howto;
bfd_reloc_status_type r;
const char * name = NULL;
int r_type;
+ asection *osec;
+ struct frv_pic_relocs_info *picrel;
+ bfd_vma orig_addend = rel->r_addend;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+
+ if ( r_type == R_FRV_GNU_VTINHERIT
+ || r_type == R_FRV_GNU_VTENTRY)
+ continue;
+
+ /* This is a final link. */
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ howto = elf32_frv_howto_table + ELF32_R_TYPE (rel->r_info);
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
+
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ osec = sec = local_sections [r_symndx];
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+
+ name = bfd_elf_string_from_elf_section
+ (input_bfd, symtab_hdr->sh_link, sym->st_name);
+ name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
+ }
+ 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;
+
+ name = h->root.root.string;
+
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && ! FRV_SYM_LOCAL (info, h))
+ {
+ sec = NULL;
+ relocation = 0;
+ }
+ else
+ 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);
+ }
+ else if (h->root.type == bfd_link_hash_undefweak)
+ {
+ relocation = 0;
+ }
+ else if ( ! info->executable
+ && ! info->symbolic
+ && info->unresolved_syms_in_objects == RM_IGNORE
+ && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
+ relocation = 0;
+ else
+ {
+ if (! ((*info->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd,
+ input_section, rel->r_offset, TRUE)))
+ return FALSE;
+ relocation = 0;
+ }
+ osec = sec;
+ }
+
+ switch (r_type)
+ {
+ case R_FRV_LABEL24:
+ case R_FRV_32:
+ case R_FRV_GOT12:
+ case R_FRV_GOTHI:
+ case R_FRV_GOTLO:
+ case R_FRV_FUNCDESC_GOT12:
+ case R_FRV_FUNCDESC_GOTHI:
+ case R_FRV_FUNCDESC_GOTLO:
+ case R_FRV_GOTOFF12:
+ case R_FRV_GOTOFFHI:
+ case R_FRV_GOTOFFLO:
+ case R_FRV_FUNCDESC_GOTOFF12:
+ case R_FRV_FUNCDESC_GOTOFFHI:
+ case R_FRV_FUNCDESC_GOTOFFLO:
+ case R_FRV_FUNCDESC:
+ case R_FRV_FUNCDESC_VALUE:
+ if (h != NULL)
+ picrel = frv_pic_relocs_info_for_global (frv_relocs_info (info),
+ input_bfd, h,
+ orig_addend);
+ else
+ /* In order to find the entry we created before, we must
+ use the original addend, not the one that may have been
+ modified by _bfd_elf_rela_local_sym(). */
+ picrel = frv_pic_relocs_info_for_local (frv_relocs_info (info),
+ input_bfd, r_symndx,
+ orig_addend);
+ if (! picrel)
+ return FALSE;
+
+ if (!_frv_emit_got_relocs_plt_entries (picrel, output_bfd, info,
+ osec, sym, rel->r_addend))
+ {
+ info->callbacks->warning
+ (info, _("Dynamic relocation references symbol with nonzero addend"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+
+ }
+
+ break;
+
+ default:
+ picrel = NULL;
+ if (h && ! FRV_SYM_LOCAL (info, h))
+ {
+ info->callbacks->warning
+ (info, _("relocation references symbol not defined in the module"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ break;
+ }
+
+ switch (r_type)
+ {
+ case R_FRV_LABEL24:
+ check_segment[0] = isec_segment;
+ if (picrel->plt)
+ {
+ relocation = frv_plt_section (info)->output_section->vma
+ + frv_plt_section (info)->output_offset
+ + picrel->plt_entry;
+ check_segment[1] = plt_segment;
+ }
+ /* We don't want to warn on calls to undefined weak symbols,
+ as calls to them must be protected by non-NULL tests
+ anyway, and unprotected calls would invoke undefined
+ behavior. */
+ else if (picrel->symndx == -1
+ && picrel->d.h->root.type == bfd_link_hash_undefweak)
+ check_segment[1] = check_segment[0];
+ else
+ check_segment[1] = sec
+ ? _frv_osec_to_segment (output_bfd, sec->output_section)
+ : (unsigned)-1;
+ break;
+
+ case R_FRV_GOT12:
+ case R_FRV_GOTHI:
+ case R_FRV_GOTLO:
+ relocation = picrel->got_entry;
+ check_segment[0] = check_segment[1] = got_segment;
+ break;
+
+ case R_FRV_FUNCDESC_GOT12:
+ case R_FRV_FUNCDESC_GOTHI:
+ case R_FRV_FUNCDESC_GOTLO:
+ relocation = picrel->fdgot_entry;
+ check_segment[0] = check_segment[1] = got_segment;
+ break;
+
+ case R_FRV_GOTOFFHI:
+ case R_FRV_GOTOFF12:
+ case R_FRV_GOTOFFLO:
+ relocation -= frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info);
+ check_segment[0] = got_segment;
+ check_segment[1] = sec
+ ? _frv_osec_to_segment (output_bfd, sec->output_section)
+ : (unsigned)-1;
+ break;
+
+ case R_FRV_FUNCDESC_GOTOFF12:
+ case R_FRV_FUNCDESC_GOTOFFHI:
+ case R_FRV_FUNCDESC_GOTOFFLO:
+ relocation = picrel->fd_entry;
+ check_segment[0] = check_segment[1] = got_segment;
+ break;
+
+ case R_FRV_FUNCDESC:
+ {
+ int dynindx;
+ bfd_vma addend = rel->r_addend;
+
+ /* If the symbol is dynamic and there may be dynamic
+ symbol resolution because we are or are linked with a
+ shared library, emit a FUNCDESC relocation such that
+ the dynamic linker will allocate the function
+ descriptor. */
+ if (h && ! FRV_FUNCDESC_LOCAL (info, h))
+ {
+ if (addend)
+ {
+ info->callbacks->warning
+ (info, _("R_FRV_FUNCDESC references dynamic symbol with nonzero addend"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ dynindx = h->dynindx;
+ }
+ else
+ {
+ /* Otherwise, we know we have a private function
+ descriptor, so reference it directly. */
+ BFD_ASSERT (picrel->privfd);
+ r_type = R_FRV_32;
+ dynindx = elf_section_data (frv_got_section
+ (info)->output_section)->dynindx;
+ addend = frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info)
+ + picrel->fd_entry;
+ }
+
+ /* If there is room for dynamic symbol resolution, emit
+ the dynamic relocation. However, if we're linking an
+ executable at a fixed location, we won't have emitted a
+ dynamic symbol entry for the got section, so idx will
+ be zero, which means we can and should compute the
+ address of the private descriptor ourselves. */
+ if (info->executable && !info->pie
+ && (!h || FRV_FUNCDESC_LOCAL (info, h)))
+ {
+ addend += frv_got_section (info)->output_section->vma;
+ if ((bfd_get_section_flags (output_bfd,
+ input_section->output_section)
+ & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
+ {
+ if (_frv_osec_readonly_p (output_bfd,
+ input_section->output_section))
+ {
+ info->callbacks->warning
+ (info,
+ _("cannot emit fixups in read-only section"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ if (! h || h->root.type != bfd_link_hash_undefweak)
+ _frv_add_rofixup (output_bfd,
+ frv_gotfixup_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset)
+ + input_section->output_section->vma
+ + input_section->output_offset);
+ }
+ }
+ else if ((bfd_get_section_flags (output_bfd,
+ input_section->output_section)
+ & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
+ {
+ if (_frv_osec_readonly_p (output_bfd,
+ input_section->output_section))
+ {
+ info->callbacks->warning
+ (info,
+ _("cannot emit dynamic relocations in read-only section"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ _frv_add_dyn_reloc (output_bfd, frv_gotrel_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset)
+ + input_section->output_section->vma
+ + input_section->output_offset,
+ r_type, dynindx, addend);
+ }
+
+ /* We want the addend in-place because dynamic
+ relocations are REL. Setting relocation to it should
+ arrange for it to be installed. */
+ relocation = addend - rel->r_addend;
+ }
+ check_segment[0] = check_segment[1] = got_segment;
+ break;
+
+ case R_FRV_32:
+ case R_FRV_FUNCDESC_VALUE:
+ {
+ int dynindx;
+ bfd_vma addend = rel->r_addend;
+
+ /* If the symbol is dynamic but binds locally, use
+ section+offset. */
+ if (h && ! FRV_SYM_LOCAL (info, h))
+ {
+ if (addend && r_type == R_FRV_FUNCDESC_VALUE)
+ {
+ info->callbacks->warning
+ (info, _("R_FRV_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ dynindx = h->dynindx;
+ }
+ else
+ {
+ if (h)
+ addend += h->root.u.def.value;
+ else
+ addend += sym->st_value;
+ if (osec)
+ addend += osec->output_offset;
+ if (osec && osec->output_section
+ && ! bfd_is_abs_section (osec->output_section)
+ && ! bfd_is_und_section (osec->output_section))
+ dynindx = elf_section_data (osec->output_section)->dynindx;
+ else
+ dynindx = 0;
+ }
+
+ /* If we're linking an executable at a fixed address, we
+ can omit the dynamic relocation as long as the symbol
+ is defined in the current link unit (which is implied
+ by its output section not being NULL). */
+ if (info->executable && !info->pie
+ && (!h || FRV_SYM_LOCAL (info, h)))
+ {
+ if (osec)
+ addend += osec->output_section->vma;
+ if ((elf_elfheader (input_bfd)->e_flags & EF_FRV_FDPIC)
+ && (bfd_get_section_flags (output_bfd,
+ input_section->output_section)
+ & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
+ {
+ if (_frv_osec_readonly_p (output_bfd,
+ input_section->output_section))
+ {
+ info->callbacks->warning
+ (info,
+ _("cannot emit fixups in read-only section"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ if (!h || h->root.type != bfd_link_hash_undefweak)
+ {
+ _frv_add_rofixup (output_bfd,
+ frv_gotfixup_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset)
+ + input_section->output_section->vma
+ + input_section->output_offset);
+ if (r_type == R_FRV_FUNCDESC_VALUE)
+ _frv_add_rofixup
+ (output_bfd,
+ frv_gotfixup_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset)
+ + input_section->output_section->vma
+ + input_section->output_offset + 4);
+ }
+ }
+ }
+ else
+ {
+ if ((bfd_get_section_flags (output_bfd,
+ input_section->output_section)
+ & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
+ {
+ if (_frv_osec_readonly_p (output_bfd,
+ input_section->output_section))
+ {
+ info->callbacks->warning
+ (info,
+ _("cannot emit dynamic relocations in read-only section"),
+ name, input_bfd, input_section, rel->r_offset);
+ return FALSE;
+ }
+ _frv_add_dyn_reloc (output_bfd, frv_gotrel_section (info),
+ _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset)
+ + input_section->output_section->vma
+ + input_section->output_offset,
+ r_type, dynindx, addend);
+ }
+ /* We want the addend in-place because dynamic
+ relocations are REL. Setting relocation to it
+ should arrange for it to be installed. */
+ relocation = addend - rel->r_addend;
+ }
+
+ if (r_type == R_FRV_FUNCDESC_VALUE)
+ {
+ /* If we've omitted the dynamic relocation, just emit
+ the fixed addresses of the symbol and of the local
+ GOT base offset. */
+ if (info->executable && !info->pie
+ && (!h || FRV_SYM_LOCAL (info, h)))
+ bfd_put_32 (output_bfd,
+ frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info),
+ contents + rel->r_offset + 4);
+ else
+ /* A function descriptor used for lazy or local
+ resolving is initialized such that its high word
+ contains the output section index in which the
+ PLT entries are located, and the low word
+ contains the offset of the lazy PLT entry entry
+ point into that section. */
+ bfd_put_32 (output_bfd,
+ h && ! FRV_SYM_LOCAL (info, h)
+ ? 0
+ : _frv_osec_to_segment (output_bfd,
+ sec->output_section),
+ contents + rel->r_offset + 4);
+ }
+ }
+ check_segment[0] = check_segment[1] = got_segment;
+ break;
+
+ case R_FRV_GPREL12:
+ case R_FRV_GPRELU12:
+ case R_FRV_GPREL32:
+ case R_FRV_GPRELHI:
+ case R_FRV_GPRELLO:
+ check_segment[0] = gprel_segment;
+ check_segment[1] = sec
+ ? _frv_osec_to_segment (output_bfd, sec->output_section)
+ : (unsigned)-1;
+ break;
+
+ default:
+ check_segment[0] = isec_segment;
+ check_segment[1] = sec
+ ? _frv_osec_to_segment (output_bfd, sec->output_section)
+ : (unsigned)-1;
+ break;
+ }
+
+ if (check_segment[0] != check_segment[1]
+ && (elf_elfheader (output_bfd)->e_flags & EF_FRV_FDPIC))
+ {
+#if 1
+ /* This helps catch problems in GCC while we can't do more
+ than static linking. The idea is to test whether the
+ input file basename is crt0.o only once. */
+ if (silence_segment_error == 1)
+ silence_segment_error =
+ (strlen (input_bfd->filename) == 6
+ && strcmp (input_bfd->filename, "crt0.o") == 0)
+ || (strlen (input_bfd->filename) > 6
+ && strcmp (input_bfd->filename
+ + strlen (input_bfd->filename) - 7,
+ "/crt0.o") == 0)
+ ? -1 : 0;
+#endif
+ if (!silence_segment_error
+ /* We don't want duplicate errors for undefined
+ symbols. */
+ && !(picrel && picrel->symndx == -1
+ && picrel->d.h->root.type == bfd_link_hash_undefined))
+ info->callbacks->warning
+ (info,
+ (info->shared || info->pie)
+ ? _("relocations between different segments are not supported")
+ : _("warning: relocation references a different segment"),
+ name, input_bfd, input_section, rel->r_offset);
+ if (!silence_segment_error && (info->shared || info->pie))
+ return FALSE;
+ elf_elfheader (output_bfd)->e_flags |= EF_FRV_PIC;
+ }
+
+ switch (r_type)
+ {
+ case R_FRV_GOTOFFHI:
+ /* We need the addend to be applied before we shift the
+ value right. */
+ relocation += rel->r_addend;
+ /* Fall through. */
+ case R_FRV_GOTHI:
+ case R_FRV_FUNCDESC_GOTHI:
+ case R_FRV_FUNCDESC_GOTOFFHI:
+ relocation >>= 16;
+ /* Fall through. */
+
+ case R_FRV_GOTLO:
+ case R_FRV_FUNCDESC_GOTLO:
+ case R_FRV_GOTOFFLO:
+ case R_FRV_FUNCDESC_GOTOFFLO:
+ relocation &= 0xffff;
+ break;
+
+ default:
+ break;
+ }
+
+ switch (r_type)
+ {
+ case R_FRV_LABEL24:
+ if (! picrel->plt)
+ break;
+ /* Fall through. */
+
+ /* When referencing a GOT entry, a function descriptor or a
+ PLT, we don't want the addend to apply to the reference,
+ but rather to the referenced symbol. The actual entry
+ will have already been created taking the addend into
+ account, so cancel it out here. */
+ case R_FRV_GOT12:
+ case R_FRV_GOTHI:
+ case R_FRV_GOTLO:
+ case R_FRV_FUNCDESC_GOT12:
+ case R_FRV_FUNCDESC_GOTHI:
+ case R_FRV_FUNCDESC_GOTLO:
+ case R_FRV_FUNCDESC_GOTOFF12:
+ case R_FRV_FUNCDESC_GOTOFFHI:
+ case R_FRV_FUNCDESC_GOTOFFLO:
+ /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
+ here, since we do want to apply the addend to the others.
+ Note that we've applied the addend to GOTOFFHI before we
+ shifted it right. */
+ case R_FRV_GOTOFFHI:
+ relocation -= rel->r_addend;
+ break;
+
+ default:
+ break;
+ }
+
+ if (r_type == R_FRV_HI16)
+ r = elf32_frv_relocate_hi16 (input_bfd, rel, contents, relocation);
+
+ else if (r_type == R_FRV_LO16)
+ r = elf32_frv_relocate_lo16 (input_bfd, rel, contents, relocation);
+
+ else if (r_type == R_FRV_LABEL24)
+ r = elf32_frv_relocate_label24 (input_bfd, input_section, rel,
+ contents, relocation);
+
+ else if (r_type == R_FRV_GPREL12)
+ r = elf32_frv_relocate_gprel12 (info, input_bfd, input_section, rel,
+ contents, relocation);
+
+ else if (r_type == R_FRV_GPRELU12)
+ r = elf32_frv_relocate_gprelu12 (info, input_bfd, input_section, rel,
+ contents, relocation);
+
+ else if (r_type == R_FRV_GPRELLO)
+ r = elf32_frv_relocate_gprello (info, input_bfd, input_section, rel,
+ contents, relocation);
+
+ else if (r_type == R_FRV_GPRELHI)
+ r = elf32_frv_relocate_gprelhi (info, input_bfd, input_section, rel,
+ contents, relocation);
+
+ else
+ r = frv_final_link_relocate (howto, input_bfd, input_section, contents,
+ rel, relocation);
+
+ if (r != bfd_reloc_ok)
+ {
+ const char * msg = (const char *) NULL;
+
+ switch (r)
+ {
+ case bfd_reloc_overflow:
+ r = info->callbacks->reloc_overflow
+ (info, name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset);
+ break;
+
+ case bfd_reloc_undefined:
+ r = info->callbacks->undefined_symbol
+ (info, name, input_bfd, input_section, rel->r_offset, TRUE);
+ break;
+
+ case bfd_reloc_outofrange:
+ msg = _("internal error: out of range error");
+ break;
+
+ case bfd_reloc_notsupported:
+ msg = _("internal error: unsupported relocation error");
+ break;
+
+ case bfd_reloc_dangerous:
+ msg = _("internal error: dangerous relocation");
+ break;
+
+ default:
+ msg = _("internal error: unknown error");
+ break;
+ }
+
+ if (msg)
+ r = info->callbacks->warning
+ (info, msg, name, input_bfd, input_section, rel->r_offset);
+
+ if (! r)
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+\f
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+elf32_frv_gc_mark_hook (sec, info, rel, h, sym)
+ asection *sec;
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ 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_FRV_GNU_VTINHERIT:
+ case R_FRV_GNU_VTENTRY:
+ break;
+
+ default:
+ switch (h->root.type)
+ {
+ default:
+ break;
+
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ return h->root.u.def.section;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+ }
+ }
+ }
+ else
+ return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+
+ return NULL;
+}
+
+/* Update the got entry reference counts for the section being removed. */
+
+static bfd_boolean
+elf32_frv_gc_sweep_hook (abfd, info, sec, relocs)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ asection *sec ATTRIBUTE_UNUSED;
+ const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
+{
+ return TRUE;
+}
+
+\f
+/* Hook called by the linker routine which adds symbols from an object
+ file. We use it to put .comm items in .scomm, and not .comm. */
+
+static bfd_boolean
+elf32_frv_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 ATTRIBUTE_UNUSED;
+ flagword *flagsp ATTRIBUTE_UNUSED;
+ asection **secp;
+ bfd_vma *valp;
+{
+ if (sym->st_shndx == SHN_COMMON
+ && !info->relocatable
+ && (int)sym->st_size <= (int)bfd_get_gp_size (abfd))
+ {
+ /* Common symbols less than or equal to -G nn bytes are
+ automatically put into .sbss. */
+
+ asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
+
+ if (scomm == NULL)
+ {
+ scomm = bfd_make_section (abfd, ".scommon");
+ if (scomm == NULL
+ || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
+ | SEC_IS_COMMON
+ | SEC_LINKER_CREATED)))
+ return FALSE;
+ }
+
+ *secp = scomm;
+ *valp = sym->st_size;
+ }
+
+ return TRUE;
+}
+/* Create a .got section, as well as its additional info field. This
+ is almost entirely copied from
+ elflink.c:_bfd_elf_create_got_section(). */
+
+static bfd_boolean
+_frv_create_got_section (bfd *abfd, struct bfd_link_info *info)
+{
+ flagword flags;
+ asection *s;
+ struct elf_link_hash_entry *h;
+ struct bfd_link_hash_entry *bh;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ int ptralign;
+
+ /* This function may be called more than once. */
+ s = bfd_get_section_by_name (abfd, ".got");
+ if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
+ return TRUE;
+
+ /* Machine specific: although pointers are 32-bits wide, we want the
+ GOT to be aligned to a 64-bit boundary, such that function
+ descriptors in it can be accessed with 64-bit loads and
+ stores. */
+ ptralign = 3;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+
+ s = bfd_make_section (abfd, ".got");
+ if (s == NULL
+ || !bfd_set_section_flags (abfd, s, flags)
+ || !bfd_set_section_alignment (abfd, s, ptralign))
+ return FALSE;
+
+ if (bed->want_got_plt)
+ {
+ s = bfd_make_section (abfd, ".got.plt");
+ if (s == NULL
+ || !bfd_set_section_flags (abfd, s, flags)
+ || !bfd_set_section_alignment (abfd, s, ptralign))
+ return FALSE;
+ }
+
+ if (bed->want_got_sym)
+ {
+ /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
+ (or .got.plt) section. We don't do this in the linker script
+ because we don't want to define the symbol if we are not creating
+ a global offset table. */
+ bh = NULL;
+ if (!(_bfd_generic_link_add_one_symbol
+ (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
+ bed->got_symbol_offset, (const char *) NULL, FALSE,
+ bed->collect, &bh)))
+ return FALSE;
+ h = (struct elf_link_hash_entry *) bh;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ /* Machine-specific: we want the symbol for executables as
+ well. */
+ if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+
+ elf_hash_table (info)->hgot = h;
+ }
+
+ /* The first bit of the global offset table is the header. */
+ s->_raw_size += bed->got_header_size + bed->got_symbol_offset;
+
+ /* This is the machine-specific part. Create and initialize section
+ data for the got. */
+ frv_got_section (info) = s;
+ frv_relocs_info (info) = htab_try_create (1, frv_pic_relocs_info_hash,
+ frv_pic_relocs_info_eq,
+ (htab_del) NULL);
+ if (! frv_relocs_info (info))
+ return FALSE;
+
+ s = bfd_make_section (abfd, ".rel.got");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, (flags | SEC_READONLY))
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return FALSE;
+
+ frv_gotrel_section (info) = s;
+
+ /* Machine-specific. */
+ s = bfd_make_section (abfd, ".rofixup");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, (flags | SEC_READONLY))
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return FALSE;
+
+ frv_gotfixup_section (info) = s;
+
+ /* Define _gp in .rofixup, for FDPIC. If it turns out that
+ we're linking with a different linker script, the linker script
+ will override it. */
+ bh = NULL;
+ if (!(_bfd_generic_link_add_one_symbol
+ (info, abfd, "_gp", BSF_GLOBAL, s, -2048, (const char *) NULL, FALSE,
+ bed->collect, &bh)))
+ return FALSE;
+ h = (struct elf_link_hash_entry *) bh;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ /* Machine-specific: we want the symbol for executables as well. */
+ if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+
+ return TRUE;
+}
+
+/* Make sure the got and plt sections exist, and that our pointers in
+ the link hash table point to them. */
+
+static bfd_boolean
+elf32_frv_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
+{
+ /* This is mostly copied from
+ elflink.c:_bfd_elf_create_dynamic_sections(). */
+ flagword flags, pltflags;
+ asection *s;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
+ .rel[a].bss sections. */
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+
+ pltflags = flags;
+ pltflags |= SEC_CODE;
+ if (bed->plt_not_loaded)
+ pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
+ if (bed->plt_readonly)
+ pltflags |= SEC_READONLY;
+
+ s = bfd_make_section (abfd, ".plt");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, pltflags)
+ || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
+ return FALSE;
+ /* FRV-specific: remember it. */
+ frv_plt_section (info) = s;
+
+ if (bed->want_plt_sym)
+ {
+ /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
+ .plt section. */
+ struct elf_link_hash_entry *h;
+ struct bfd_link_hash_entry *bh = NULL;
+
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
+ FALSE, get_elf_backend_data (abfd)->collect, &bh)))
+ return FALSE;
+ h = (struct elf_link_hash_entry *) bh;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ if (! info->executable
+ && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ /* FRV-specific: we want rel relocations for the plt. */
+ s = bfd_make_section (abfd, ".rel.plt");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
+ return FALSE;
+ /* FRV-specific: remember it. */
+ frv_pltrel_section (info) = s;
+
+ /* FRV-specific: we want to create the GOT in the FRV way. */
+ if (! _frv_create_got_section (abfd, info))
+ return FALSE;
+
+ /* FRV-specific: make sure we created everything we wanted. */
+ BFD_ASSERT (frv_got_section (info) && frv_gotrel_section (info)
+ && frv_gotfixup_section (info)
+ && frv_plt_section (info) && frv_pltrel_section (info));
+
+ if (bed->want_dynbss)
+ {
+ /* The .dynbss section is a place to put symbols which are defined
+ by dynamic objects, are referenced by regular objects, and are
+ not functions. We must allocate space for them in the process
+ image and use a R_*_COPY reloc to tell the dynamic linker to
+ initialize them at run time. The linker script puts the .dynbss
+ section into the .bss section of the final image. */
+ s = bfd_make_section (abfd, ".dynbss");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
+ return FALSE;
+
+ /* The .rel[a].bss section holds copy relocs. This section is not
+ normally needed. We need to create it here, though, so that the
+ linker will map it to an output section. We can't just create it
+ only if we need it, because we will not know whether we need it
+ until we have seen all the input files, and the first time the
+ main linker code calls BFD after examining all the input files
+ (size_dynamic_sections) the input sections have already been
+ mapped to the output sections. If the section turns out not to
+ be needed, we can discard it later. We will never need this
+ section when generating a shared object, since they do not use
+ copy relocs. */
+ if (! info->shared)
+ {
+ s = bfd_make_section (abfd,
+ (bed->default_use_rela_p
+ ? ".rela.bss" : ".rel.bss"));
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* The name of the dynamic interpreter. This is put in the .interp
+ section. */
+
+#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
+
+#define DEFAULT_STACK_SIZE 0x20000
+
+/* This structure is used to collect the number of entries present in
+ each addressable range of the got. */
+struct _frv_dynamic_got_info
+{
+ /* Several bits of information about the current link. */
+ struct bfd_link_info *info;
+ /* Total size needed for GOT entries within the 12-, 16- or 32-bit
+ ranges. */
+ bfd_vma got12, gotlos, gothilo;
+ /* Total size needed for function descriptor entries within the 12-,
+ 16- or 32-bit ranges. */
+ bfd_vma fd12, fdlos, fdhilo;
+ /* Total size needed function descriptor entries referenced in PLT
+ entries, that would be profitable to place in offsets close to
+ the PIC register. */
+ bfd_vma fdplt;
+ /* Total size needed by lazy PLT entries. */
+ bfd_vma lzplt;
+ /* Number of relocations carried over from input object files. */
+ unsigned long relocs;
+ /* Number of fixups introduced by relocations in input object files. */
+ unsigned long fixups;
+};
+
+/* Compute the total GOT size required by each symbol in each range.
+ Symbols may require up to 4 words in the GOT: an entry pointing to
+ the symbol, an entry pointing to its function descriptor, and a
+ private function descriptors taking two words. */
+
+static int
+_frv_count_got_plt_entries (void **entryp, void *dinfo_)
+{
+ struct frv_pic_relocs_info *entry = *entryp;
+ struct _frv_dynamic_got_info *dinfo = dinfo_;
+
+ /* Allocate space for a GOT entry pointing to the symbol. */
+ if (entry->got12)
+ dinfo->got12 += 4;
+ else if (entry->gotlos)
+ dinfo->gotlos += 4;
+ else if (entry->gothilo)
+ dinfo->gothilo += 4;
+ else
+ entry->relocs32--;
+ entry->relocs32++;
+
+ /* Allocate space for a GOT entry pointing to the function
+ descriptor. */
+ if (entry->fdgot12)
+ dinfo->got12 += 4;
+ else if (entry->fdgotlos)
+ dinfo->gotlos += 4;
+ else if (entry->fdgothilo)
+ dinfo->gothilo += 4;
+ else
+ entry->relocsfd--;
+ entry->relocsfd++;
+
+ /* Decide whether we need a PLT entry, a function descriptor in the
+ GOT, and a lazy PLT entry for this symbol. */
+ entry->plt = entry->call
+ && entry->symndx == -1 && ! FRV_SYM_LOCAL (dinfo->info, entry->d.h)
+ && elf_hash_table (dinfo->info)->dynamic_sections_created;
+ entry->privfd = entry->plt
+ || entry->fdgoff12 || entry->fdgofflos || entry->fdgoffhilo
+ || ((entry->fd || entry->fdgot12 || entry->fdgotlos || entry->fdgothilo)
+ && (entry->symndx != -1
+ || FRV_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
+ entry->lazyplt = entry->privfd
+ && entry->symndx == -1 && ! FRV_SYM_LOCAL (dinfo->info, entry->d.h)
+ && ! (dinfo->info->flags & DF_BIND_NOW)
+ && elf_hash_table (dinfo->info)->dynamic_sections_created;
+
+ /* Allocate space for a function descriptor. */
+ if (entry->fdgoff12)
+ dinfo->fd12 += 8;
+ else if (entry->fdgofflos)
+ dinfo->fdlos += 8;
+ else if (entry->privfd && entry->plt)
+ dinfo->fdplt += 8;
+ else if (entry->privfd)
+ dinfo->fdhilo += 8;
+ else
+ entry->relocsfdv--;
+ entry->relocsfdv++;
+
+ if (entry->lazyplt)
+ dinfo->lzplt += 8;
+
+ if (!dinfo->info->executable || dinfo->info->pie)
+ dinfo->relocs += entry->relocs32 + entry->relocsfd + entry->relocsfdv;
+ else
+ {
+ if (entry->symndx != -1 || FRV_SYM_LOCAL (dinfo->info, entry->d.h))
+ {
+ if (entry->symndx != -1
+ || entry->d.h->root.type != bfd_link_hash_undefweak)
+ dinfo->fixups += entry->relocs32 + 2 * entry->relocsfdv;
+ }
+ else
+ dinfo->relocs += entry->relocs32 + entry->relocsfdv;
+ if (entry->symndx != -1 || FRV_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
+ {
+ if (entry->symndx != -1
+ || entry->d.h->root.type != bfd_link_hash_undefweak)
+ dinfo->fixups += entry->relocsfd;
+ }
+ else
+ dinfo->relocs += entry->relocsfd;
+ }
+
+ return 1;
+}
+
+/* This structure is used to assign offsets to got entries, function
+ descriptors, plt entries and lazy plt entries. */
+
+struct _frv_dynamic_got_plt_info
+{
+ /* Summary information collected with _frv_count_got_plt_entries. */
+ struct _frv_dynamic_got_info g;
+
+ /* For each addressable range, we record a MAX (positive) and MIN
+ (negative) value. CUR is used to assign got entries, and it's
+ incremented from an initial positive value to MAX, then from MIN
+ to FDCUR (unless FDCUR wraps around first). FDCUR is used to
+ assign function descriptors, and it's decreased from an initial
+ non-positive value to MIN, then from MAX down to CUR (unless CUR
+ wraps around first). All of MIN, MAX, CUR and FDCUR always point
+ to even words. ODD, if non-zero, indicates an odd word to be
+ used for the next got entry, otherwise CUR is used and
+ incremented by a pair of words, wrapping around when it reaches
+ MAX. FDCUR is decremented (and wrapped) before the next function
+ descriptor is chosen. FDPLT indicates the number of remaining
+ slots that can be used for function descriptors used only by PLT
+ entries. */
+ struct _frv_dynamic_got_alloc_data
+ {
+ bfd_signed_vma max, cur, odd, fdcur, min;
+ bfd_vma fdplt;
+ } got12, gotlos, gothilo;
+};
+
+/* Determine the positive and negative ranges to be used by each
+ offset range in the GOT. FDCUR and CUR, that must be aligned to a
+ double-word boundary, are the minimum (negative) and maximum
+ (positive) GOT offsets already used by previous ranges, except for
+ an ODD entry that may have been left behind. GOT and FD indicate
+ the size of GOT entries and function descriptors that must be
+ placed within the range from -WRAP to WRAP. If there's room left,
+ up to FDPLT bytes should be reserved for additional function
+ descriptors. */
+
+inline static bfd_signed_vma
+_frv_compute_got_alloc_data (struct _frv_dynamic_got_alloc_data *gad,
+ bfd_signed_vma fdcur,
+ bfd_signed_vma odd,
+ bfd_signed_vma cur,
+ bfd_vma got,
+ bfd_vma fd,
+ bfd_vma fdplt,
+ bfd_vma wrap)
+{
+ bfd_signed_vma wrapmin = -wrap;
+
+ /* Start at the given initial points. */
+ gad->fdcur = fdcur;
+ gad->cur = cur;
+
+ /* If we had an incoming odd word and we have any got entries that
+ are going to use it, consume it, otherwise leave gad->odd at
+ zero. We might force gad->odd to zero and return the incoming
+ odd such that it is used by the next range, but then GOT entries
+ might appear to be out of order and we wouldn't be able to
+ shorten the GOT by one word if it turns out to end with an
+ unpaired GOT entry. */
+ if (odd && got)
+ {
+ gad->odd = odd;
+ got -= 4;
+ odd = 0;
+ }
+ else
+ gad->odd = 0;
+
+ /* If we're left with an unpaired GOT entry, compute its location
+ such that we can return it. Otherwise, if got doesn't require an
+ odd number of words here, either odd was already zero in the
+ block above, or it was set to zero because got was non-zero, or
+ got was already zero. In the latter case, we want the value of
+ odd to carry over to the return statement, so we don't want to
+ reset odd unless the condition below is true. */
+ if (got & 4)
+ {
+ odd = cur + got;
+ got += 4;
+ }
+
+ /* Compute the tentative boundaries of this range. */
+ gad->max = cur + got;
+ gad->min = fdcur - fd;
+ gad->fdplt = 0;
+
+ /* If function descriptors took too much space, wrap some of them
+ around. */
+ if (gad->min < wrapmin)
+ {
+ gad->max += wrapmin - gad->min;
+ gad->min = wrapmin;
+ }
+ /* If there is space left and we have function descriptors
+ referenced in PLT entries that could take advantage of shorter
+ offsets, place them here. */
+ else if (fdplt && gad->min > wrapmin)
+ {
+ bfd_vma fds;
+ if ((bfd_vma) (gad->min - wrapmin) < fdplt)
+ fds = gad->min - wrapmin;
+ else
+ fds = fdplt;
+
+ fdplt -= fds;
+ gad->min -= fds;
+ gad->fdplt += fds;
+ }
+
+ /* If GOT entries took too much space, wrap some of them around.
+ This may well cause gad->min to become lower than wrapmin. This
+ will cause a relocation overflow later on, so we don't have to
+ report it here . */
+ if ((bfd_vma) gad->max > wrap)
+ {
+ gad->min -= gad->max - wrap;
+ gad->max = wrap;
+ }
+ /* If there is more space left, try to place some more function
+ descriptors for PLT entries. */
+ else if (fdplt && (bfd_vma) gad->max < wrap)
+ {
+ bfd_vma fds;
+ if ((bfd_vma) (wrap - gad->max) < fdplt)
+ fds = wrap - gad->max;
+ else
+ fds = fdplt;
+
+ fdplt -= fds;
+ gad->max += fds;
+ gad->fdplt += fds;
+ }
+
+ /* If odd was initially computed as an offset past the wrap point,
+ wrap it around. */
+ if (odd > gad->max)
+ odd = gad->min + odd - gad->max;
+
+ /* _frv_get_got_entry() below will always wrap gad->cur if needed
+ before returning, so do it here too. This guarantees that,
+ should cur and fdcur meet at the wrap point, they'll both be
+ equal to min. */
+ if (gad->cur == gad->max)
+ gad->cur = gad->min;
+
+ return odd;
+}
+
+/* Compute the location of the next GOT entry, given the allocation
+ data for a range. */
+
+inline static bfd_signed_vma
+_frv_get_got_entry (struct _frv_dynamic_got_alloc_data *gad)
+{
+ bfd_signed_vma ret;
+
+ if (gad->odd)
+ {
+ /* If there was an odd word left behind, use it. */
+ ret = gad->odd;
+ gad->odd = 0;
+ }
+ else
+ {
+ /* Otherwise, use the word pointed to by cur, reserve the next
+ as an odd word, and skip to the next pair of words, possibly
+ wrapping around. */
+ ret = gad->cur;
+ gad->odd = gad->cur + 4;
+ gad->cur += 8;
+ if (gad->cur == gad->max)
+ gad->cur = gad->min;
+ }
+
+ return ret;
+}
+
+/* Compute the location of the next function descriptor entry in the
+ GOT, given the allocation data for a range. */
+
+inline static bfd_signed_vma
+_frv_get_fd_entry (struct _frv_dynamic_got_alloc_data *gad)
+{
+ /* If we're at the bottom, wrap around, and only then allocate the
+ next pair of words. */
+ if (gad->fdcur == gad->min)
+ gad->fdcur = gad->max;
+ return gad->fdcur -= 8;
+}
+
+/* Assign GOT offsets for every GOT entry and function descriptor.
+ Doing everything in a single pass is tricky. */
+
+static int
+_frv_assign_got_entries (void **entryp, void *info_)
+{
+ struct frv_pic_relocs_info *entry = *entryp;
+ struct _frv_dynamic_got_plt_info *dinfo = info_;
+
+ if (entry->got12)
+ entry->got_entry = _frv_get_got_entry (&dinfo->got12);
+ else if (entry->gotlos)
+ entry->got_entry = _frv_get_got_entry (&dinfo->gotlos);
+ else if (entry->gothilo)
+ entry->got_entry = _frv_get_got_entry (&dinfo->gothilo);
+
+ if (entry->fdgot12)
+ entry->fdgot_entry = _frv_get_got_entry (&dinfo->got12);
+ else if (entry->fdgotlos)
+ entry->fdgot_entry = _frv_get_got_entry (&dinfo->gotlos);
+ else if (entry->fdgothilo)
+ entry->fdgot_entry = _frv_get_got_entry (&dinfo->gothilo);
+
+ if (entry->fdgoff12)
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->got12);
+ else if (entry->plt && dinfo->got12.fdplt)
+ {
+ dinfo->got12.fdplt -= 8;
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->got12);
+ }
+ else if (entry->fdgofflos)
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->gotlos);
+ else if (entry->plt && dinfo->gotlos.fdplt)
+ {
+ dinfo->gotlos.fdplt -= 8;
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->gotlos);
+ }
+ else if (entry->plt)
+ {
+ dinfo->gothilo.fdplt -= 8;
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->gothilo);
+ }
+ else if (entry->privfd)
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->gothilo);
+
+ return 1;
+}
+
+/* Assign GOT offsets to private function descriptors used by PLT
+ entries (or referenced by 32-bit offsets), as well as PLT entries
+ and lazy PLT entries. */
+
+static int
+_frv_assign_plt_entries (void **entryp, void *info_)
+{
+ struct frv_pic_relocs_info *entry = *entryp;
+ struct _frv_dynamic_got_plt_info *dinfo = info_;
+
+ /* If this symbol requires a local function descriptor, allocate
+ one. */
+ if (entry->privfd && entry->fd_entry == 0)
+ {
+ if (dinfo->got12.fdplt)
+ {
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->got12);
+ dinfo->got12.fdplt -= 8;
+ }
+ else if (dinfo->gotlos.fdplt)
+ {
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->gotlos);
+ dinfo->gotlos.fdplt -= 8;
+ }
+ else
+ {
+ BFD_ASSERT (dinfo->gothilo.fdplt)
+ entry->fd_entry = _frv_get_fd_entry (&dinfo->gothilo);
+ dinfo->gothilo.fdplt -= 8;
+ }
+ }
+
+ if (entry->plt)
+ {
+ int size;
+
+ /* We use the section's raw size to mark the location of the
+ next PLT entry. */
+ entry->plt_entry = frv_plt_section (dinfo->g.info)->_raw_size;
+
+ /* Figure out the length of this PLT entry based on the
+ addressing mode we need to reach the function descriptor. */
+ BFD_ASSERT (entry->fd_entry);
+ if (entry->fd_entry >= -(1 << (12 - 1))
+ && entry->fd_entry < (1 << (12 - 1)))
+ size = 8;
+ else if (entry->fd_entry >= -(1 << (16 - 1))
+ && entry->fd_entry < (1 << (16 - 1)))
+ size = 12;
+ else
+ size = 16;
+
+ frv_plt_section (dinfo->g.info)->_raw_size += size;
+ }
+
+ if (entry->lazyplt)
+ {
+ entry->lzplt_entry = dinfo->g.lzplt;
+ dinfo->g.lzplt += 8;
+ /* If this entry is the one that gets the resolver stub, account
+ for the additional instruction. */
+ if (entry->lzplt_entry % FRV_LZPLT_BLOCK_SIZE == FRV_LZPLT_RESOLV_LOC)
+ dinfo->g.lzplt += 4;
+ }
+
+ return 1;
+}
+
+/* Follow indirect and warning hash entries so that each got entry
+ points to the final symbol definition. P must point to a pointer
+ to the hash table we're traversing. Since this traversal may
+ modify the hash table, we set this pointer to NULL to indicate
+ we've made a potentially-destructive change to the hash table, so
+ the traversal must be restarted. */
+static int
+_frv_resolve_final_relocs_info (void **entryp, void *p)
+{
+ struct frv_pic_relocs_info *entry = *entryp;
+ htab_t *htab = p;
+
+ if (entry->symndx == -1)
+ {
+ struct elf_link_hash_entry *h = entry->d.h;
+
+ 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 (entry->d.h == h)
+ return 1;
+
+ entry->d.h = h;
+
+ /* If we can't find this entry with the new bfd hash, re-insert
+ it, and get the traversal restarted. */
+ if (! htab_find (*htab, entry))
+ {
+ htab_clear_slot (*htab, entryp);
+ entryp = htab_find_slot (*htab, entry, INSERT);
+ if (! *entryp)
+ *entryp = entry;
+ /* Abort the traversal, since the whole table may have
+ moved, and leave it up to the parent to restart the
+ process. */
+ *(htab_t *)p = NULL;
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static bfd_boolean
+elf32_frv_size_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *s;
+ struct _frv_dynamic_got_plt_info gpinfo;
+ bfd_signed_vma odd;
+ bfd_vma limit;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ BFD_ASSERT (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 (dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
+ }
+ }
+
+ memset (&gpinfo, 0, sizeof (gpinfo));
+ gpinfo.g.info = info;
+
+ for (;;)
+ {
+ htab_t relocs = frv_relocs_info (info);
+
+ htab_traverse (relocs, _frv_resolve_final_relocs_info, &relocs);
+
+ if (relocs == frv_relocs_info (info))
+ break;
+ }
+
+ htab_traverse (frv_relocs_info (info), _frv_count_got_plt_entries,
+ &gpinfo.g);
+
+ odd = 12;
+ /* Compute the total size taken by entries in the 12-bit and 16-bit
+ ranges, to tell how many PLT function descriptors we can bring
+ into the 12-bit range without causing the 16-bit range to
+ overflow. */
+ limit = odd + gpinfo.g.got12 + gpinfo.g.gotlos
+ + gpinfo.g.fd12 + gpinfo.g.fdlos;
+ if (limit < (bfd_vma)1 << 16)
+ limit = ((bfd_vma)1 << 16) - limit;
+ else
+ limit = 0;
+ if (gpinfo.g.fdplt < limit)
+ limit = gpinfo.g.fdplt;
+
+ /* Determine the ranges of GOT offsets that we can use for each
+ range of addressing modes. */
+ odd = _frv_compute_got_alloc_data (&gpinfo.got12,
+ 0,
+ odd,
+ 16,
+ gpinfo.g.got12,
+ gpinfo.g.fd12,
+ limit,
+ (bfd_vma)1 << (12-1));
+ odd = _frv_compute_got_alloc_data (&gpinfo.gotlos,
+ gpinfo.got12.min,
+ odd,
+ gpinfo.got12.max,
+ gpinfo.g.gotlos,
+ gpinfo.g.fdlos,
+ gpinfo.g.fdplt - gpinfo.got12.fdplt,
+ (bfd_vma)1 << (16-1));
+ odd = _frv_compute_got_alloc_data (&gpinfo.gothilo,
+ gpinfo.gotlos.min,
+ odd,
+ gpinfo.gotlos.max,
+ gpinfo.g.gothilo,
+ gpinfo.g.fdhilo,
+ gpinfo.g.fdplt - gpinfo.got12.fdplt
+ - gpinfo.gotlos.fdplt,
+ (bfd_vma)1 << (32-1));
+
+ /* Now assign (most) GOT offsets. */
+ htab_traverse (frv_relocs_info (info), _frv_assign_got_entries, &gpinfo);
+
+ frv_got_section (info)->_raw_size = gpinfo.gothilo.max - gpinfo.gothilo.min
+ /* If an odd word is the last word of the GOT, we don't need this
+ word to be part of the GOT. */
+ - (odd + 4 == gpinfo.gothilo.max ? 4 : 0);
+ if (frv_got_section (info)->_raw_size == 0)
+ frv_got_section (info)->flags |= SEC_EXCLUDE;
+ else if (frv_got_section (info)->_raw_size == 12
+ && ! elf_hash_table (info)->dynamic_sections_created)
+ {
+ frv_got_section (info)->flags |= SEC_EXCLUDE;
+ frv_got_section (info)->_raw_size = 0;
+ }
+ else
+ {
+ frv_got_section (info)->contents =
+ (bfd_byte *) bfd_zalloc (dynobj, frv_got_section (info)->_raw_size);
+ if (frv_got_section (info)->contents == NULL)
+ return FALSE;
+ }
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ /* Subtract the number of lzplt entries, since those will generate
+ relocations in the pltrel section. */
+ frv_gotrel_section (info)->_raw_size =
+ (gpinfo.g.relocs - gpinfo.g.lzplt / 8)
+ * get_elf_backend_data (output_bfd)->s->sizeof_rel;
+ else
+ BFD_ASSERT (gpinfo.g.relocs == 0);
+ if (frv_gotrel_section (info)->_raw_size == 0)
+ frv_gotrel_section (info)->flags |= SEC_EXCLUDE;
+ else
+ {
+ frv_gotrel_section (info)->contents =
+ (bfd_byte *) bfd_zalloc (dynobj, frv_gotrel_section (info)->_raw_size);
+ if (frv_gotrel_section (info)->contents == NULL)
+ return FALSE;
+ }
+
+ if (elf_elfheader (output_bfd)->e_flags & EF_FRV_FDPIC)
+ frv_gotfixup_section (info)->_raw_size = (gpinfo.g.fixups + 1) * 4;
+ if (frv_gotfixup_section (info)->_raw_size == 0)
+ frv_gotfixup_section (info)->flags |= SEC_EXCLUDE;
+ else
+ {
+ frv_gotfixup_section (info)->contents =
+ (bfd_byte *) bfd_zalloc (dynobj,
+ frv_gotfixup_section (info)->_raw_size);
+ if (frv_gotfixup_section (info)->contents == NULL)
+ return FALSE;
+ }
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ frv_pltrel_section (info)->_raw_size =
+ gpinfo.g.lzplt / 8 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
+ if (frv_pltrel_section (info)->_raw_size == 0)
+ frv_pltrel_section (info)->flags |= SEC_EXCLUDE;
+ else
+ {
+ frv_pltrel_section (info)->contents =
+ (bfd_byte *) bfd_zalloc (dynobj,
+ frv_pltrel_section (info)->_raw_size);
+ if (frv_pltrel_section (info)->contents == NULL)
+ return FALSE;
+ }
+ }
+
+ /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
+ such that there's room for the additional instruction needed to
+ call the resolver. Since _frv_assign_got_entries didn't account
+ for them, our block size is 4 bytes smaller than the real block
+ size. */
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ frv_plt_section (info)->_raw_size = gpinfo.g.lzplt
+ + ((gpinfo.g.lzplt + (FRV_LZPLT_BLOCK_SIZE - 4) - 8)
+ / (FRV_LZPLT_BLOCK_SIZE - 4) * 4);
+ }
- r_type = ELF32_R_TYPE (rel->r_info);
+ /* Reset it, such that _frv_assign_plt_entries() can use it to
+ actually assign lazy PLT entries addresses. */
+ gpinfo.g.lzplt = 0;
- if ( r_type == R_FRV_GNU_VTINHERIT
- || r_type == R_FRV_GNU_VTENTRY)
- continue;
+ /* Save information that we're going to need to generate GOT and PLT
+ entries. */
+ frv_got_initial_offset (info) = -gpinfo.gothilo.min;
- /* This is a final link. */
- r_symndx = ELF32_R_SYM (rel->r_info);
- howto = elf32_frv_howto_table + ELF32_R_TYPE (rel->r_info);
- h = NULL;
- sym = NULL;
- sec = NULL;
+ if (get_elf_backend_data (output_bfd)->want_got_sym)
+ elf_hash_table (info)->hgot->root.u.def.value
+ += frv_got_initial_offset (info);
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections [r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+ if (elf_hash_table (info)->dynamic_sections_created)
+ frv_plt_initial_offset (info) = frv_plt_section (info)->_raw_size;
- name = bfd_elf_string_from_elf_section
- (input_bfd, symtab_hdr->sh_link, sym->st_name);
- name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
- }
+ htab_traverse (frv_relocs_info (info), _frv_assign_plt_entries, &gpinfo);
+
+ /* Allocate the PLT section contents only after
+ _frv_assign_plt_entries has a chance to add the size of the
+ non-lazy PLT entries. */
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ if (frv_plt_section (info)->_raw_size == 0)
+ frv_plt_section (info)->flags |= SEC_EXCLUDE;
else
{
- h = sym_hashes [r_symndx - symtab_hdr->sh_info];
+ frv_plt_section (info)->contents =
+ (bfd_byte *) bfd_zalloc (dynobj, frv_plt_section (info)->_raw_size);
+ if (frv_plt_section (info)->contents == NULL)
+ return FALSE;
+ }
+ }
- 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 (elf_hash_table (info)->dynamic_sections_created)
+ {
+ if (frv_got_section (info)->_raw_size)
+ if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0))
+ return FALSE;
+
+ if (frv_pltrel_section (info)->_raw_size)
+ if (! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
+ return FALSE;
+
+ if (frv_gotrel_section (info)->_raw_size)
+ if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
+ sizeof (Elf32_External_Rel)))
+ return FALSE;
+ }
- name = h->root.root.string;
+ return TRUE;
+}
- 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);
- }
- else if (h->root.type == bfd_link_hash_undefweak)
- {
- relocation = 0;
- }
- else
- {
- if (! ((*info->callbacks->undefined_symbol)
- (info, h->root.root.string, input_bfd,
- input_section, rel->r_offset, TRUE)))
- return FALSE;
- relocation = 0;
- }
- }
+static bfd_boolean
+elf32_frv_always_size_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ if (!info->relocatable
+ && elf_elfheader (output_bfd)->e_flags & EF_FRV_FDPIC)
+ {
+ struct elf_link_hash_entry *h;
+ asection *sec;
- if (r_type == R_FRV_HI16)
- r = elf32_frv_relocate_hi16 (input_bfd, rel, contents, relocation);
+ /* Force a PT_GNU_STACK segment to be created. */
+ if (! elf_tdata (output_bfd)->stack_flags)
+ elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
- else if (r_type == R_FRV_LO16)
- r = elf32_frv_relocate_lo16 (input_bfd, rel, contents, relocation);
+ /* Define __stacksize if it's not defined yet. */
+ h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
+ FALSE, FALSE, FALSE);
+ if (! h || h->root.type != bfd_link_hash_defined
+ || h->type != STT_OBJECT
+ || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
+ {
+ struct bfd_link_hash_entry *bh;
- else if (r_type == R_FRV_LABEL24)
- r = elf32_frv_relocate_label24 (input_bfd, input_section, rel,
- contents, relocation);
+ if (!(_bfd_generic_link_add_one_symbol
+ (info, output_bfd, "__stacksize",
+ BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
+ (const char *) NULL, FALSE,
+ get_elf_backend_data (output_bfd)->collect, &bh)))
+ return FALSE;
- else if (r_type == R_FRV_GPREL12)
- r = elf32_frv_relocate_gprel12 (info, input_bfd, input_section, rel,
- contents, relocation);
+ h = (struct elf_link_hash_entry *) bh;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+ }
- else if (r_type == R_FRV_GPRELU12)
- r = elf32_frv_relocate_gprelu12 (info, input_bfd, input_section, rel,
- contents, relocation);
+ /* Create a stack section, and set its alignment. */
+ sec = bfd_make_section (output_bfd, ".stack");
- else if (r_type == R_FRV_GPRELLO)
- r = elf32_frv_relocate_gprello (info, input_bfd, input_section, rel,
- contents, relocation);
+ if (sec == NULL
+ || ! bfd_set_section_alignment (output_bfd, sec, 3))
+ return FALSE;
+ }
- else if (r_type == R_FRV_GPRELHI)
- r = elf32_frv_relocate_gprelhi (info, input_bfd, input_section, rel,
- contents, relocation);
+ return TRUE;
+}
- else
- r = frv_final_link_relocate (howto, input_bfd, input_section, contents,
- rel, relocation);
+static bfd_boolean
+elf32_frv_modify_segment_map (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ if (elf_elfheader (output_bfd)->e_flags & EF_FRV_FDPIC)
+ {
+ struct elf_segment_map *m;
- if (r != bfd_reloc_ok)
+ for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
+ if (m->p_type == PT_GNU_STACK)
+ break;
+
+ if (m)
{
- const char * msg = (const char *) NULL;
+ asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
+ struct elf_link_hash_entry *h;
- switch (r)
+ if (sec)
{
- case bfd_reloc_overflow:
- r = info->callbacks->reloc_overflow
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset);
- break;
+ /* Obtain the pointer to the __stacksize symbol. */
+ h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
+ FALSE, FALSE, FALSE);
+ 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;
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined);
+
+ /* Set the section size from the symbol value. We
+ intentionally ignore the symbol section. */
+ if (h->root.type == bfd_link_hash_defined)
+ sec->_raw_size = h->root.u.def.value;
+ else
+ sec->_raw_size = DEFAULT_STACK_SIZE;
+
+ /* Add the stack section to the PT_GNU_STACK segment,
+ such that its size and alignment requirements make it
+ to the segment. */
+ m->sections[m->count] = sec;
+ m->count++;
+ }
+ }
+ }
- case bfd_reloc_undefined:
- r = info->callbacks->undefined_symbol
- (info, name, input_bfd, input_section, rel->r_offset, TRUE);
- break;
+ return TRUE;
+}
- case bfd_reloc_outofrange:
- msg = _("internal error: out of range error");
- break;
+/* Fill in code and data in dynamic sections. */
- case bfd_reloc_notsupported:
- msg = _("internal error: unsupported relocation error");
- break;
+static bfd_boolean
+elf32_frv_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *sdyn;
- case bfd_reloc_dangerous:
- msg = _("internal error: dangerous relocation");
- break;
+ dynobj = elf_hash_table (info)->dynobj;
- default:
- msg = _("internal error: unknown error");
- break;
- }
+ if (frv_got_section (info))
+ {
+ BFD_ASSERT (frv_gotrel_section (info)->_raw_size
+ == (frv_gotrel_section (info)->reloc_count
+ * sizeof (Elf32_External_Rel)));
- if (msg)
- r = info->callbacks->warning
- (info, msg, name, input_bfd, input_section, rel->r_offset);
+ if (frv_gotfixup_section (info))
+ {
+ if (elf_elfheader (output_bfd)->e_flags & EF_FRV_FDPIC)
+ {
+ struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
+ bfd_vma got_value = hgot->root.u.def.value
+ + hgot->root.u.def.section->output_section->vma
+ + hgot->root.u.def.section->output_offset;
- if (! r)
- return FALSE;
+ _frv_add_rofixup (output_bfd, frv_gotfixup_section (info),
+ got_value);
+ }
+
+ if (frv_gotfixup_section (info)->_raw_size
+ != (frv_gotfixup_section (info)->reloc_count * 4))
+ {
+ if (!elf_hash_table (info)->dynamic_sections_created)
+ {
+ info->callbacks->warning
+ (info, "no dynamic sections, missing -melf32frvfd?",
+ ".rofixup", NULL, NULL, 0);
+ return FALSE;
+ }
+ BFD_ASSERT (0);
+ }
}
}
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ BFD_ASSERT (frv_pltrel_section (info)->_raw_size
+ == (frv_pltrel_section (info)->reloc_count
+ * sizeof (Elf32_External_Rel)));
+ }
- return TRUE;
-}
-\f
-/* Return the section that should be marked against GC for a given
- relocation. */
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
-static asection *
-elf32_frv_gc_mark_hook (sec, info, rel, h, sym)
- asection *sec;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- Elf_Internal_Rela *rel;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
-{
- if (h != NULL)
+ if (elf_hash_table (info)->dynamic_sections_created)
{
- switch (ELF32_R_TYPE (rel->r_info))
+ Elf32_External_Dyn * dyncon;
+ Elf32_External_Dyn * dynconend;
+
+ BFD_ASSERT (sdyn != NULL);
+
+ dyncon = (Elf32_External_Dyn *) sdyn->contents;
+ dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+
+ for (; dyncon < dynconend; dyncon++)
{
- case R_FRV_GNU_VTINHERIT:
- case R_FRV_GNU_VTENTRY:
- break;
+ Elf_Internal_Dyn dyn;
- default:
- switch (h->root.type)
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
{
default:
break;
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- return h->root.u.def.section;
+ case DT_PLTGOT:
+ dyn.d_un.d_ptr = frv_got_section (info)->output_section->vma
+ + frv_got_section (info)->output_offset
+ + frv_got_initial_offset (info);
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
- case bfd_link_hash_common:
- return h->root.u.c.p->section;
+ case DT_JMPREL:
+ dyn.d_un.d_ptr = frv_pltrel_section (info)->output_section->vma
+ + frv_pltrel_section (info)->output_offset;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
+ case DT_PLTRELSZ:
+ if (frv_pltrel_section (info)->_cooked_size != 0)
+ dyn.d_un.d_val = frv_pltrel_section (info)->_cooked_size;
+ else
+ dyn.d_un.d_val = frv_pltrel_section (info)->_raw_size;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
}
}
}
- else
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
- return NULL;
+ return TRUE;
}
-/* Update the got entry reference counts for the section being removed. */
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. */
static bfd_boolean
-elf32_frv_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
+elf32_frv_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
{
+ bfd * dynobj;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ /* Make sure we know what is going on here. */
+ BFD_ASSERT (dynobj != NULL
+ && (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 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;
}
-\f
-/* Hook called by the linker routine which adds symbols from an object
- file. We use it to put .comm items in .scomm, and not .comm. */
+/* Perform any actions needed for dynamic symbols. */
static bfd_boolean
-elf32_frv_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 ATTRIBUTE_UNUSED;
- flagword *flagsp ATTRIBUTE_UNUSED;
- asection **secp;
- bfd_vma *valp;
+elf32_frv_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
+ Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
{
- if (sym->st_shndx == SHN_COMMON
- && !info->relocatable
- && (int)sym->st_size <= (int)bfd_get_gp_size (abfd))
- {
- /* Common symbols less than or equal to -G nn bytes are
- automatically put into .sbss. */
-
- asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
-
- if (scomm == NULL)
- {
- scomm = bfd_make_section (abfd, ".scommon");
- if (scomm == NULL
- || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
- | SEC_IS_COMMON
- | SEC_LINKER_CREATED)))
- return FALSE;
- }
-
- *secp = scomm;
- *valp = sym->st_size;
- }
-
return TRUE;
}
+
/* Look through the relocs for a section during the first phase.
- Since we don't do .gots or .plts, we just need to consider the
- virtual table relocs for gc. */
+
+ Besides handling virtual table relocs for gc, we have to deal with
+ all sorts of PIC-related relocations. We describe below the
+ general plan on how to handle such relocations, even though we only
+ collect information at this point, storing them in hash tables for
+ perusal of later passes.
+
+ 32 relocations are propagated to the linker output when creating
+ position-independent output. LO16 and HI16 relocations are not
+ supposed to be encountered in this case.
+
+ LABEL16 should always be resolvable by the linker, since it's only
+ used by branches.
+
+ LABEL24, on the other hand, is used by calls. If it turns out that
+ the target of a call is a dynamic symbol, a PLT entry must be
+ created for it, which triggers the creation of a private function
+ descriptor and, unless lazy binding is disabled, a lazy PLT entry.
+
+ GPREL relocations require the referenced symbol to be in the same
+ segment as _gp, but this can only be checked later.
+
+ All GOT, GOTOFF and FUNCDESC relocations require a .got section to
+ exist. LABEL24 might as well, since it may require a PLT entry,
+ that will require a got.
+
+ Non-FUNCDESC GOT relocations require a GOT entry to be created
+ regardless of whether the symbol is dynamic. However, since a
+ global symbol that turns out to not be exported may have the same
+ address of a non-dynamic symbol, we don't assign GOT entries at
+ this point, such that we can share them in this case. A relocation
+ for the GOT entry always has to be created, be it to offset a
+ private symbol by the section load address, be it to get the symbol
+ resolved dynamically.
+
+ FUNCDESC GOT relocations require a GOT entry to be created, and
+ handled as if a FUNCDESC relocation was applied to the GOT entry in
+ an object file.
+
+ FUNCDESC relocations referencing a symbol that turns out to NOT be
+ dynamic cause a private function descriptor to be created. The
+ FUNCDESC relocation then decays to a 32 relocation that points at
+ the private descriptor. If the symbol is dynamic, the FUNCDESC
+ relocation is propagated to the linker output, such that the
+ dynamic linker creates the canonical descriptor, pointing to the
+ dynamically-resolved definition of the function.
+
+ Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
+ symbols that are assigned to the same segment as the GOT, but we
+ can only check this later, after we know the complete set of
+ symbols defined and/or exported.
+
+ FUNCDESC GOTOFF relocations require a function descriptor to be
+ created and, unless lazy binding is disabled or the symbol is not
+ dynamic, a lazy PLT entry. Since we can't tell at this point
+ whether a symbol is going to be dynamic, we have to decide later
+ whether to create a lazy PLT entry or bind the descriptor directly
+ to the private function.
+
+ FUNCDESC_VALUE relocations are not supposed to be present in object
+ files, but they may very well be simply propagated to the linker
+ output, since they have no side effect.
+
+
+ A function descriptor always requires a FUNCDESC_VALUE relocation.
+ Whether it's in .plt.rel or not depends on whether lazy binding is
+ enabled and on whether the referenced symbol is dynamic.
+
+ The existence of a lazy PLT requires the resolverStub lazy PLT
+ entry to be present.
+
+
+ As for assignment of GOT, PLT and lazy PLT entries, and private
+ descriptors, we might do them all sequentially, but we can do
+ better than that. For example, we can place GOT entries and
+ private function descriptors referenced using 12-bit operands
+ closer to the PIC register value, such that these relocations don't
+ overflow. Those that are only referenced with LO16 relocations
+ could come next, but we may as well place PLT-required function
+ descriptors in the 12-bit range to make them shorter. Symbols
+ referenced with LO16/HI16 may come next, but we may place
+ additional function descriptors in the 16-bit range if we can
+ reliably tell that we've already placed entries that are ever
+ referenced with only LO16. PLT entries are therefore generated as
+ small as possible, while not introducing relocation overflows in
+ GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
+ generated before or after PLT entries, but not intermingled with
+ them, such that we can have more lazy PLT entries in range for a
+ branch to the resolverStub. The resolverStub should be emitted at
+ the most distant location from the first lazy PLT entry such that
+ it's still in range for a branch, or closer, if there isn't a need
+ for so many lazy PLT entries. Additional lazy PLT entries may be
+ emitted after the resolverStub, as long as branches are still in
+ range. If the branch goes out of range, longer lazy PLT entries
+ are emitted.
+
+ We could further optimize PLT and lazy PLT entries by giving them
+ priority in assignment to closer-to-gr17 locations depending on the
+ number of occurrences of references to them (assuming a function
+ that's called more often is more important for performance, so its
+ PLT entry should be faster), or taking hints from the compiler.
+ Given infinite time and money... :-) */
static bfd_boolean
elf32_frv_check_relocs (abfd, info, sec, relocs)
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
+ bfd *dynobj;
+ struct frv_pic_relocs_info *picrel;
if (info->relocatable)
return TRUE;
if (!elf_bad_symtab (abfd))
sym_hashes_end -= symtab_hdr->sh_info;
+ dynobj = elf_hash_table (info)->dynobj;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
else
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_FRV_LABEL24:
+ case R_FRV_32:
+ case R_FRV_GOT12:
+ case R_FRV_GOTHI:
+ case R_FRV_GOTLO:
+ case R_FRV_FUNCDESC_GOT12:
+ case R_FRV_FUNCDESC_GOTHI:
+ case R_FRV_FUNCDESC_GOTLO:
+ case R_FRV_GOTOFF12:
+ case R_FRV_GOTOFFHI:
+ case R_FRV_GOTOFFLO:
+ case R_FRV_FUNCDESC_GOTOFF12:
+ case R_FRV_FUNCDESC_GOTOFFHI:
+ case R_FRV_FUNCDESC_GOTOFFLO:
+ case R_FRV_FUNCDESC:
+ case R_FRV_FUNCDESC_VALUE:
+ if (! dynobj)
+ {
+ elf_hash_table (info)->dynobj = dynobj = abfd;
+ if (! _frv_create_got_section (abfd, info))
+ return FALSE;
+ }
+ if (h != NULL)
+ {
+ if (h->dynindx == -1)
+ switch (ELF_ST_VISIBILITY (h->other))
+ {
+ case STV_INTERNAL:
+ case STV_HIDDEN:
+ break;
+ default:
+ bfd_elf32_link_record_dynamic_symbol (info, h);
+ break;
+ }
+ picrel
+ = frv_pic_relocs_info_for_global (frv_relocs_info (info),
+ abfd, h,
+ rel->r_addend);
+ }
+ else
+ picrel = frv_pic_relocs_info_for_local (frv_relocs_info (info),
+ abfd, r_symndx,
+ rel->r_addend);
+ if (! picrel)
+ return FALSE;
+ break;
+
+ default:
+ picrel = NULL;
+ break;
+ }
+
switch (ELF32_R_TYPE (rel->r_info))
{
+ case R_FRV_LABEL24:
+ picrel->call = 1;
+ break;
+
+ case R_FRV_FUNCDESC_VALUE:
+ picrel->relocsfdv++;
+ if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
+ picrel->relocs32--;
+ /* Fall through. */
+ case R_FRV_32:
+ picrel->sym = 1;
+ if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
+ picrel->relocs32++;
+ break;
+
+ case R_FRV_GOT12:
+ picrel->got12 = 1;
+ break;
+
+ case R_FRV_GOTHI:
+ case R_FRV_GOTLO:
+ picrel->gothilo = 1;
+ break;
+
+ case R_FRV_FUNCDESC_GOT12:
+ picrel->fdgot12 = 1;
+ break;
+
+ case R_FRV_FUNCDESC_GOTHI:
+ case R_FRV_FUNCDESC_GOTLO:
+ picrel->fdgothilo = 1;
+ break;
+
+ case R_FRV_GOTOFF12:
+ case R_FRV_GOTOFFHI:
+ case R_FRV_GOTOFFLO:
+ picrel->gotoff = 1;
+ break;
+
+ case R_FRV_FUNCDESC_GOTOFF12:
+ picrel->fdgoff12 = 1;
+ break;
+
+ case R_FRV_FUNCDESC_GOTOFFHI:
+ case R_FRV_FUNCDESC_GOTOFFLO:
+ picrel->fdgoffhilo = 1;
+ break;
+
+ case R_FRV_FUNCDESC:
+ picrel->fd = 1;
+ picrel->relocsfd++;
+ break;
+
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_FRV_GNU_VTINHERIT:
new_flags = elf_elfheader (ibfd)->e_flags;
old_flags = elf_elfheader (obfd)->e_flags;
+ if (new_flags & EF_FRV_FDPIC)
+ new_flags &= ~EF_FRV_PIC;
+
#ifdef DEBUG
(*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
if (flags & EF_FRV_BIGPIC)
fprintf (file, " -fPIC");
+ if (flags & EF_FRV_LIBPIC)
+ fprintf (file, " -mlibrary-pic");
+
+ if (flags & EF_FRV_FDPIC)
+ fprintf (file, " -mfdpic");
+
if (flags & EF_FRV_NON_PIC_RELOCS)
fprintf (file, " non-pic relocations");
#define TARGET_BIG_SYM bfd_elf32_frv_vec
#define TARGET_BIG_NAME "elf32-frv"
-#define elf_info_to_howto_rel NULL
+#define elf_info_to_howto_rel frv_info_to_howto_rel
#define elf_info_to_howto frv_info_to_howto_rela
#define elf_backend_relocate_section elf32_frv_relocate_section
#define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
#define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
#define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
+#define bfd_elf32_bfd_link_hash_table_create frv_elf_link_hash_table_create
+#define elf_backend_always_size_sections \
+ elf32_frv_always_size_sections
+#define elf_backend_modify_segment_map \
+ elf32_frv_modify_segment_map
+
+#define elf_backend_create_dynamic_sections \
+ elf32_frv_create_dynamic_sections
+#define elf_backend_adjust_dynamic_symbol \
+ elf32_frv_adjust_dynamic_symbol
+#define elf_backend_size_dynamic_sections \
+ elf32_frv_size_dynamic_sections
+#define elf_backend_finish_dynamic_symbol \
+ elf32_frv_finish_dynamic_symbol
+#define elf_backend_finish_dynamic_sections \
+ elf32_frv_finish_dynamic_sections
+
+#define elf_backend_want_got_sym 1
+#define elf_backend_got_header_size 0
+#define elf_backend_want_got_plt 0
+#define elf_backend_plt_readonly 1
+#define elf_backend_want_plt_sym 0
+#define elf_backend_plt_header_size 0
+
+#define elf_backend_may_use_rel_p 1
+#define elf_backend_may_use_rela_p 1
+/* We use REL for dynamic relocations only. */
+#define elf_backend_default_use_rela_p 1
+
#include "elf32-target.h"
projects / thirdparty / binutils-gdb.git / commitdiff
