/* 32-bit ELF support for Nios II.
- Copyright (C) 2012, 2013 Free Software Foundation, Inc.
+ Copyright (C) 2012-2017 Free Software Foundation, Inc.
Contributed by Nigel Gray (ngray@altera.com).
Contributed by Mentor Graphics, Inc.
#include "elf-bfd.h"
#include "elf/nios2.h"
#include "opcode/nios2.h"
+#include "elf32-nios2.h"
/* Use RELA relocations. */
#ifndef USE_RELA
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
/* Target vector. */
-extern const bfd_target bfd_elf32_littlenios2_vec;
-extern const bfd_target bfd_elf32_bignios2_vec;
+extern const bfd_target nios2_elf32_le_vec;
+extern const bfd_target nios2_elf32_be_vec;
/* Offset of tp and dtp pointers from start of TLS block. */
#define TP_OFFSET 0x7000
#define DTP_OFFSET 0x8000
-/* The relocation table used for SHT_REL sections. */
-static reloc_howto_type elf_nios2_howto_table_rel[] = {
+/* The relocation tables used for SHT_REL sections. There are separate
+ tables for R1 and R2 encodings. */
+static reloc_howto_type elf_nios2_r1_howto_table_rel[] = {
/* No relocation. */
HOWTO (R_NIOS2_NONE, /* type */
0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 3, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
0xffffffff,
FALSE),
-/* Add other relocations here. */
-};
-
-static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1];
+ HOWTO (R_NIOS2_CALL26_NOAT, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ FALSE, /* pc_relative */
+ 6, /* bitpos */
+ complain_overflow_dont, /* complain on overflow */
+ nios2_elf32_call26_relocate, /* special function */
+ "R_NIOS2_CALL26_NOAT", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffc0, /* src_mask */
+ 0xffffffc0, /* dst_mask */
+ FALSE), /* pcrel_offset */
-/* Return the howto for relocation RTYPE. */
-static reloc_howto_type *
-lookup_howto (unsigned int rtype)
-{
- static int initialized = 0;
- int i;
- int howto_tbl_size = (int) (sizeof (elf_nios2_howto_table_rel)
- / sizeof (elf_nios2_howto_table_rel[0]));
+ HOWTO (R_NIOS2_GOT_LO,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 6,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOT_LO",
+ FALSE,
+ 0x003fffc0,
+ 0x003fffc0,
+ FALSE),
- if (!initialized)
- {
- initialized = 1;
- memset (elf_code_to_howto_index, 0xff,
- sizeof (elf_code_to_howto_index));
- for (i = 0; i < howto_tbl_size; i++)
- elf_code_to_howto_index[elf_nios2_howto_table_rel[i].type] = i;
- }
+ HOWTO (R_NIOS2_GOT_HA,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 6,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOT_HA",
+ FALSE,
+ 0x003fffc0,
+ 0x003fffc0,
+ FALSE),
- BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL);
- i = elf_code_to_howto_index[rtype];
- if (i >= howto_tbl_size)
- return 0;
- return elf_nios2_howto_table_rel + i;
-}
+ HOWTO (R_NIOS2_CALL_LO,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 6,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_CALL_LO",
+ FALSE,
+ 0x003fffc0,
+ 0x003fffc0,
+ FALSE),
-/* Map for converting BFD reloc types to Nios II reloc types. */
-struct elf_reloc_map
-{
- bfd_reloc_code_real_type bfd_val;
- enum elf_nios2_reloc_type elf_val;
-};
+ HOWTO (R_NIOS2_CALL_HA,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 6,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_CALL_HA",
+ FALSE,
+ 0x003fffc0,
+ 0x003fffc0,
+ FALSE),
-static const struct elf_reloc_map nios2_reloc_map[] = {
- {BFD_RELOC_NIOS2_S16, R_NIOS2_S16},
- {BFD_RELOC_NIOS2_U16, R_NIOS2_U16},
- {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16},
- {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26},
- {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5},
- {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX},
- {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6},
- {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8},
- {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16},
- {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16},
- {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16},
- {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32},
- {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16},
- {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8},
- {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL},
- {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT},
- {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY},
- {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP},
- {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP},
- {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR},
- {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN},
- {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16},
- {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16},
- {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO},
- {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA},
- {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO},
- {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA},
- {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16},
- {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16},
- {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16},
- {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16},
- {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16},
- {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD},
- {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL},
- {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL},
- {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY},
- {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT},
- {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT},
- {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
- {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF}
+/* Add other relocations here. */
};
-/* The Nios II linker needs to keep track of the number of relocs that it
- decides to copy as dynamic relocs in check_relocs for each symbol.
- This is so that it can later discard them if they are found to be
- unnecessary. We store the information in a field extending the
- regular ELF linker hash table. */
-
-struct elf32_nios2_dyn_relocs
-{
- struct elf32_nios2_dyn_relocs *next;
+static reloc_howto_type elf_nios2_r2_howto_table_rel[] = {
+ /* No relocation. */
+ HOWTO (R_NIOS2_NONE, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_NIOS2_NONE", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
- /* The input section of the reloc. */
- asection *sec;
+ /* 16-bit signed immediate relocation. */
+ HOWTO (R_NIOS2_S16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 16, /* bitpos */
+ complain_overflow_signed, /* complain on overflow */
+ bfd_elf_generic_reloc, /* special function */
+ "R_NIOS2_S16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff0000, /* src_mask */
+ 0xffff0000, /* dest_mask */
+ FALSE), /* pcrel_offset */
- /* Total number of relocs copied for the input section. */
- bfd_size_type count;
+ /* 16-bit unsigned immediate relocation. */
+ HOWTO (R_NIOS2_U16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 16, /* bitpos */
+ complain_overflow_unsigned, /* complain on overflow */
+ bfd_elf_generic_reloc, /* special function */
+ "R_NIOS2_U16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff0000, /* src_mask */
+ 0xffff0000, /* dest_mask */
+ FALSE), /* pcrel_offset */
- /* Number of pc-relative relocs copied for the input section. */
- bfd_size_type pc_count;
-};
+ HOWTO (R_NIOS2_PCREL16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 16, /* bitpos */
+ complain_overflow_signed, /* complain on overflow */
+ nios2_elf32_pcrel16_relocate, /* special function */
+ "R_NIOS2_PCREL16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff0000, /* src_mask */
+ 0xffff0000, /* dest_mask */
+ TRUE), /* pcrel_offset */
-/* Nios II ELF linker hash entry. */
+ HOWTO (R_NIOS2_CALL26, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ FALSE, /* pc_relative */
+ 6, /* bitpos */
+ complain_overflow_dont, /* complain on overflow */
+ nios2_elf32_call26_relocate, /* special function */
+ "R_NIOS2_CALL26", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffc0, /* src_mask */
+ 0xffffffc0, /* dst_mask */
+ FALSE), /* pcrel_offset */
-struct elf32_nios2_link_hash_entry
-{
- struct elf_link_hash_entry root;
+ HOWTO (R_NIOS2_IMM5,
+ 0,
+ 2,
+ 5,
+ FALSE,
+ 21,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_IMM5",
+ FALSE,
+ 0x03e00000,
+ 0x03e00000,
+ FALSE),
- /* Track dynamic relocs copied for this symbol. */
- struct elf32_nios2_dyn_relocs *dyn_relocs;
+ HOWTO (R_NIOS2_CACHE_OPX,
+ 0,
+ 2,
+ 5,
+ FALSE,
+ 11,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_CACHE_OPX",
+ FALSE,
+ 0x0000f800,
+ 0x0000f800,
+ FALSE),
-#define GOT_UNKNOWN 0
-#define GOT_NORMAL 1
-#define GOT_TLS_GD 2
-#define GOT_TLS_IE 4
- unsigned char tls_type;
+ HOWTO (R_NIOS2_IMM6,
+ 0,
+ 2,
+ 6,
+ FALSE,
+ 26,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_IMM6",
+ FALSE,
+ 0xfc000000,
+ 0xfc000000,
+ FALSE),
- /* We need to detect and take special action for symbols which are only
- referenced with %call() and not with %got(). Such symbols do not need
- a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
- linking will not work if the dynamic GOT reloc exists.
- To check for this condition efficiently, we compare got_types_used against
- CALL16_USED, meaning
- (got_types_used & (GOT16_USED | CALL16_USED)) == CALL16_USED. */
-#define GOT16_USED 1
-#define CALL16_USED 2
- unsigned char got_types_used;
-};
+ HOWTO (R_NIOS2_IMM8,
+ 0,
+ 2,
+ 8,
+ FALSE,
+ 24,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_IMM8",
+ FALSE,
+ 0xff000000,
+ 0xff000000,
+ FALSE),
-#define elf32_nios2_hash_entry(ent) \
+ HOWTO (R_NIOS2_HI16,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_hi16_relocate,
+ "R_NIOS2_HI16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_LO16,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_lo16_relocate,
+ "R_NIOS2_LO16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_HIADJ16,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_hiadj16_relocate,
+ "R_NIOS2_HIADJ16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_BFD_RELOC_32,
+ 0,
+ 2, /* long */
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_BFD_RELOC32",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_BFD_RELOC_16,
+ 0,
+ 1, /* short */
+ 16,
+ FALSE,
+ 0,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_BFD_RELOC16",
+ FALSE,
+ 0x0000ffff,
+ 0x0000ffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_BFD_RELOC_8,
+ 0,
+ 0, /* byte */
+ 8,
+ FALSE,
+ 0,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_BFD_RELOC8",
+ FALSE,
+ 0x000000ff,
+ 0x000000ff,
+ FALSE),
+
+ HOWTO (R_NIOS2_GPREL,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_gprel_relocate,
+ "R_NIOS2_GPREL",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_GNU_VTINHERIT,
+ 0,
+ 2, /* short */
+ 0,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ NULL,
+ "R_NIOS2_GNU_VTINHERIT",
+ FALSE,
+ 0,
+ 0,
+ FALSE),
+
+ HOWTO (R_NIOS2_GNU_VTENTRY,
+ 0,
+ 2, /* byte */
+ 0,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ _bfd_elf_rel_vtable_reloc_fn,
+ "R_NIOS2_GNU_VTENTRY",
+ FALSE,
+ 0,
+ 0,
+ FALSE),
+
+ HOWTO (R_NIOS2_UJMP,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_ujmp_relocate,
+ "R_NIOS2_UJMP",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_CJMP,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_cjmp_relocate,
+ "R_NIOS2_CJMP",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_CALLR,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_callr_relocate,
+ "R_NIOS2_CALLR",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_ALIGN,
+ 0,
+ 2,
+ 0,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ nios2_elf32_ignore_reloc,
+ "R_NIOS2_ALIGN",
+ FALSE,
+ 0,
+ 0,
+ TRUE),
+
+ HOWTO (R_NIOS2_GOT16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOT16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_CALL16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_CALL16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_GOTOFF_LO,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOTOFF_LO",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_GOTOFF_HA,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOTOFF_HA",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_PCREL_LO,
+ 0,
+ 2,
+ 16,
+ TRUE,
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_pcrel_lo16_relocate,
+ "R_NIOS2_PCREL_LO",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ TRUE),
+
+ HOWTO (R_NIOS2_PCREL_HA,
+ 0,
+ 2,
+ 16,
+ FALSE, /* This is a PC-relative relocation, but we need to subtract
+ PC ourselves before the HIADJ. */
+ 16,
+ complain_overflow_dont,
+ nios2_elf32_pcrel_hiadj16_relocate,
+ "R_NIOS2_PCREL_HA",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ TRUE),
+
+ HOWTO (R_NIOS2_TLS_GD16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_GD16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_LDM16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_LDM16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_LDO16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_LDO16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_IE16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_IE16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_LE16,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_bitfield,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_LE16",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_DTPMOD,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_DTPMOD",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_DTPREL,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_DTPREL",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_TLS_TPREL,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_TLS_TPREL",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_COPY,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_COPY",
+ FALSE,
+ 0,
+ 0,
+ FALSE),
+
+ HOWTO (R_NIOS2_GLOB_DAT,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GLOB_DAT",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_JUMP_SLOT,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_JUMP_SLOT",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_RELATIVE,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_RELATIVE",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_GOTOFF,
+ 0,
+ 2,
+ 32,
+ FALSE,
+ 0,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOTOFF",
+ FALSE,
+ 0xffffffff,
+ 0xffffffff,
+ FALSE),
+
+ HOWTO (R_NIOS2_CALL26_NOAT, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ FALSE, /* pc_relative */
+ 6, /* bitpos */
+ complain_overflow_dont, /* complain on overflow */
+ nios2_elf32_call26_relocate, /* special function */
+ "R_NIOS2_CALL26_NOAT", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffc0, /* src_mask */
+ 0xffffffc0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_NIOS2_GOT_LO,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOT_LO",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_GOT_HA,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_GOT_HA",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_CALL_LO,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_CALL_LO",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_CALL_HA,
+ 0,
+ 2,
+ 16,
+ FALSE,
+ 16,
+ complain_overflow_dont,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_CALL_HA",
+ FALSE,
+ 0xffff0000,
+ 0xffff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_S12,
+ 0,
+ 2,
+ 12,
+ FALSE,
+ 16,
+ complain_overflow_signed,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_S12",
+ FALSE,
+ 0x0fff0000,
+ 0x0fff0000,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_I10_1_PCREL,
+ 1,
+ 1,
+ 10,
+ TRUE,
+ 6,
+ complain_overflow_signed,
+ bfd_elf_generic_reloc, /* FIXME? */
+ "R_NIOS2_R2_I10_1_PCREL",
+ FALSE,
+ 0xffc0,
+ 0xffc0,
+ TRUE),
+
+ HOWTO (R_NIOS2_R2_T1I7_1_PCREL,
+ 1,
+ 1,
+ 7,
+ TRUE,
+ 9,
+ complain_overflow_signed,
+ bfd_elf_generic_reloc, /* FIXME? */
+ "R_NIOS2_R2_T1I7_1_PCREL",
+ FALSE,
+ 0xfe00,
+ 0xfe00,
+ TRUE),
+
+ HOWTO (R_NIOS2_R2_T1I7_2,
+ 2,
+ 1,
+ 7,
+ FALSE,
+ 9,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_T1I7_2",
+ FALSE,
+ 0xfe00,
+ 0xfe00,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_T2I4,
+ 0,
+ 1,
+ 4,
+ FALSE,
+ 12,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_T2I4",
+ FALSE,
+ 0xf000,
+ 0xf000,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_T2I4_1,
+ 1,
+ 1,
+ 4,
+ FALSE,
+ 12,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_T2I4_1",
+ FALSE,
+ 0xf000,
+ 0xf000,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_T2I4_2,
+ 2,
+ 1,
+ 4,
+ FALSE,
+ 12,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_T2I4_2",
+ FALSE,
+ 0xf000,
+ 0xf000,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_X1I7_2,
+ 2,
+ 1,
+ 7,
+ FALSE,
+ 6,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_X1I7_2",
+ FALSE,
+ 0x1fc0,
+ 0x1fc0,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_X2L5,
+ 0,
+ 1,
+ 5,
+ FALSE,
+ 6,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_X2L5",
+ FALSE,
+ 0x07c0,
+ 0x07c0,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_F1I5_2,
+ 2,
+ 1,
+ 5,
+ FALSE,
+ 6,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_F1L5_2",
+ FALSE,
+ 0x07c0,
+ 0x07c0,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_L5I4X1,
+ 2,
+ 1,
+ 4,
+ FALSE,
+ 6,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_L5I4X1",
+ FALSE,
+ 0x03c0,
+ 0x03c0,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_T1X1I6,
+ 0,
+ 1,
+ 6,
+ FALSE,
+ 9,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_T1X1I6",
+ FALSE,
+ 0x7e00,
+ 0x7e00,
+ FALSE),
+
+ HOWTO (R_NIOS2_R2_T1X1I6_2,
+ 2,
+ 2,
+ 6,
+ FALSE,
+ 9,
+ complain_overflow_unsigned,
+ bfd_elf_generic_reloc,
+ "R_NIOS2_R2_T1I1X6_2",
+ FALSE,
+ 0x7e00,
+ 0x7e00,
+ FALSE),
+
+/* Add other relocations here. */
+};
+
+static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1];
+
+
+/* Return true if producing output for a R2 BFD. */
+#define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2)
+
+/* Return the howto for relocation RTYPE. */
+static reloc_howto_type *
+lookup_howto (unsigned int rtype, bfd *abfd)
+{
+ static int initialized = 0;
+ int i;
+ /* R2 relocations are a superset of R1, so use that for the lookup
+ table. */
+ int r1_howto_tbl_size = (int) (sizeof (elf_nios2_r1_howto_table_rel)
+ / sizeof (elf_nios2_r1_howto_table_rel[0]));
+ int r2_howto_tbl_size = (int) (sizeof (elf_nios2_r2_howto_table_rel)
+ / sizeof (elf_nios2_r2_howto_table_rel[0]));
+
+ if (!initialized)
+ {
+ initialized = 1;
+ memset (elf_code_to_howto_index, 0xff,
+ sizeof (elf_code_to_howto_index));
+ for (i = 0; i < r2_howto_tbl_size; i++)
+ {
+ elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i;
+ if (i < r1_howto_tbl_size)
+ BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type
+ == elf_nios2_r1_howto_table_rel[i].type);
+ }
+ }
+
+ BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL);
+ i = elf_code_to_howto_index[rtype];
+ if (BFD_IS_R2 (abfd))
+ {
+ if (i >= r2_howto_tbl_size)
+ return 0;
+ return elf_nios2_r2_howto_table_rel + i;
+ }
+ else
+ {
+ if (i >= r1_howto_tbl_size)
+ return 0;
+ return elf_nios2_r1_howto_table_rel + i;
+ }
+}
+
+/* Map for converting BFD reloc types to Nios II reloc types. */
+struct elf_reloc_map
+{
+ bfd_reloc_code_real_type bfd_val;
+ enum elf_nios2_reloc_type elf_val;
+};
+
+static const struct elf_reloc_map nios2_reloc_map[] = {
+ {BFD_RELOC_NONE, R_NIOS2_NONE},
+ {BFD_RELOC_NIOS2_S16, R_NIOS2_S16},
+ {BFD_RELOC_NIOS2_U16, R_NIOS2_U16},
+ {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16},
+ {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26},
+ {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5},
+ {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX},
+ {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6},
+ {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8},
+ {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16},
+ {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16},
+ {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16},
+ {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32},
+ {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16},
+ {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8},
+ {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL},
+ {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT},
+ {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY},
+ {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP},
+ {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP},
+ {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR},
+ {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN},
+ {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16},
+ {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16},
+ {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO},
+ {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA},
+ {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO},
+ {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA},
+ {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16},
+ {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16},
+ {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16},
+ {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16},
+ {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16},
+ {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD},
+ {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL},
+ {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL},
+ {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY},
+ {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT},
+ {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT},
+ {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
+ {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF},
+ {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT},
+ {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO},
+ {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA},
+ {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO},
+ {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA},
+ {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12},
+ {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL},
+ {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL},
+ {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2},
+ {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4},
+ {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1},
+ {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2},
+ {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2},
+ {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5},
+ {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2},
+ {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1},
+ {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6},
+ {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2},
+};
+
+enum elf32_nios2_stub_type
+{
+ nios2_stub_call26_before,
+ nios2_stub_call26_after,
+ nios2_stub_none
+};
+
+struct elf32_nios2_stub_hash_entry
+{
+ /* Base hash table entry structure. */
+ struct bfd_hash_entry bh_root;
+
+ /* The stub section. */
+ asection *stub_sec;
+
+ /* Offset within stub_sec of the beginning of this stub. */
+ bfd_vma stub_offset;
+
+ /* Given the symbol's value and its section we can determine its final
+ value when building the stubs (so the stub knows where to jump. */
+ bfd_vma target_value;
+ asection *target_section;
+
+ enum elf32_nios2_stub_type stub_type;
+
+ /* The symbol table entry, if any, that this was derived from. */
+ struct elf32_nios2_link_hash_entry *hh;
+
+ /* And the reloc addend that this was derived from. */
+ bfd_vma addend;
+
+ /* Where this stub is being called from, or, in the case of combined
+ stub sections, the first input section in the group. */
+ asection *id_sec;
+};
+
+#define nios2_stub_hash_entry(ent) \
+ ((struct elf32_nios2_stub_hash_entry *)(ent))
+
+#define nios2_stub_hash_lookup(table, string, create, copy) \
+ ((struct elf32_nios2_stub_hash_entry *) \
+ bfd_hash_lookup ((table), (string), (create), (copy)))
+
+
+/* The Nios II linker needs to keep track of the number of relocs that it
+ decides to copy as dynamic relocs in check_relocs for each symbol.
+ This is so that it can later discard them if they are found to be
+ unnecessary. We store the information in a field extending the
+ regular ELF linker hash table. */
+
+struct elf32_nios2_dyn_relocs
+{
+ struct elf32_nios2_dyn_relocs *next;
+
+ /* The input section of the reloc. */
+ asection *sec;
+
+ /* Total number of relocs copied for the input section. */
+ bfd_size_type count;
+
+ /* Number of pc-relative relocs copied for the input section. */
+ bfd_size_type pc_count;
+};
+
+/* Nios II ELF linker hash entry. */
+
+struct elf32_nios2_link_hash_entry
+{
+ struct elf_link_hash_entry root;
+
+ /* A pointer to the most recently used stub hash entry against this
+ symbol. */
+ struct elf32_nios2_stub_hash_entry *hsh_cache;
+
+ /* Track dynamic relocs copied for this symbol. */
+ struct elf32_nios2_dyn_relocs *dyn_relocs;
+
+#define GOT_UNKNOWN 0
+#define GOT_NORMAL 1
+#define GOT_TLS_GD 2
+#define GOT_TLS_IE 4
+ unsigned char tls_type;
+
+ /* We need to detect and take special action for symbols which are only
+ referenced with %call() and not with %got(). Such symbols do not need
+ a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
+ linking will not work if the dynamic GOT reloc exists.
+ To check for this condition efficiently, we compare got_types_used against
+ CALL_USED, meaning
+ (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
+ */
+#define GOT_USED 1
+#define CALL_USED 2
+ unsigned char got_types_used;
+};
+
+#define elf32_nios2_hash_entry(ent) \
((struct elf32_nios2_link_hash_entry *) (ent))
-/* Get the Nios II elf linker hash table from a link_info structure. */
-#define elf32_nios2_hash_table(info) \
- ((struct elf32_nios2_link_hash_table *) ((info)->hash))
+/* Get the Nios II elf linker hash table from a link_info structure. */
+#define elf32_nios2_hash_table(info) \
+ ((struct elf32_nios2_link_hash_table *) ((info)->hash))
+
+/* Nios II ELF linker hash table. */
+struct elf32_nios2_link_hash_table
+ {
+ /* The main hash table. */
+ struct elf_link_hash_table root;
+
+ /* The stub hash table. */
+ struct bfd_hash_table bstab;
+
+ /* Linker stub bfd. */
+ bfd *stub_bfd;
+
+ /* Linker call-backs. */
+ asection * (*add_stub_section) (const char *, asection *, bfd_boolean);
+ void (*layout_sections_again) (void);
+
+ /* Array to keep track of which stub sections have been created, and
+ information on stub grouping. */
+ struct map_stub
+ {
+ /* These are the section to which stubs in the group will be
+ attached. */
+ asection *first_sec, *last_sec;
+ /* The stub sections. There might be stubs inserted either before
+ or after the real section.*/
+ asection *first_stub_sec, *last_stub_sec;
+ } *stub_group;
+
+ /* Assorted information used by nios2_elf32_size_stubs. */
+ unsigned int bfd_count;
+ unsigned int top_index;
+ asection **input_list;
+ Elf_Internal_Sym **all_local_syms;
+
+ /* Short-cuts to get to dynamic linker sections. */
+ asection *sbss;
+
+ /* GOT pointer symbol _gp_got. */
+ struct elf_link_hash_entry *h_gp_got;
+
+ union {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } tls_ldm_got;
+
+ /* Small local sym cache. */
+ struct sym_cache sym_cache;
+
+ bfd_vma res_n_size;
+ };
+
+struct nios2_elf32_obj_tdata
+{
+ struct elf_obj_tdata root;
+
+ /* tls_type for each local got entry. */
+ char *local_got_tls_type;
+
+ /* TRUE if TLS GD relocs have been seen for this object. */
+ bfd_boolean has_tlsgd;
+};
+
+#define elf32_nios2_tdata(abfd) \
+ ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
+
+#define elf32_nios2_local_got_tls_type(abfd) \
+ (elf32_nios2_tdata (abfd)->local_got_tls_type)
+
+/* The name of the dynamic interpreter. This is put in the .interp
+ section. */
+#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
+
+/* PLT implementation for position-dependent code. */
+static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */
+ 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
+ 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
+ 0x7800683a /* jmp r15 */
+};
+
+static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */
+ 0x03800034, /* movhi r14, %hiadj(res_0) */
+ 0x73800004, /* addi r14, r14, %lo(res_0) */
+ 0x7b9fc83a, /* sub r15, r15, r14 */
+ 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
+ 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
+ 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
+ 0x6800683a /* jmp r13 */
+};
+
+/* PLT implementation for position-independent code. */
+static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */
+ 0x03c00034, /* movhi r15, %hiadj(index * 4) */
+ 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
+ 0x00000006 /* br .PLTresolve */
+};
+
+static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */
+ 0x001ce03a, /* nextpc r14 */
+ 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
+ 0x6b9b883a, /* add r13, r13, r14 */
+ 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
+ 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
+ 0x6800683a /* jmp r13 */
+};
+
+/* CALL26 stub. */
+static const bfd_vma nios2_call26_stub_entry[] = {
+ 0x00400034, /* orhi at, r0, %hiadj(dest) */
+ 0x08400004, /* addi at, at, %lo(dest) */
+ 0x0800683a /* jmp at */
+};
+
+/* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
+static void
+nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value)
+{
+ bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset);
+
+ BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff);
+
+ bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6),
+ sec->contents + offset);
+}
+
+/* Install COUNT 32-bit values DATA starting at offset OFFSET into
+ section SEC. */
+static void
+nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset,
+ int count)
+{
+ while (count--)
+ {
+ bfd_put_32 (sec->owner, *data, sec->contents + offset);
+ offset += 4;
+ ++data;
+ }
+}
+
+/* The usual way of loading a 32-bit constant into a Nios II register is to
+ load the high 16 bits in one instruction and then add the low 16 bits with
+ a signed add. This means that the high halfword needs to be adjusted to
+ compensate for the sign bit of the low halfword. This function returns the
+ adjusted high halfword for a given 32-bit constant. */
+static
+bfd_vma hiadj (bfd_vma symbol_value)
+{
+ return ((symbol_value + 0x8000) >> 16) & 0xffff;
+}
+
+/* Implement elf_backend_grok_prstatus:
+ Support for core dump NOTE sections. */
+static bfd_boolean
+nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+ int offset;
+ size_t size;
+
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
+
+ case 212: /* Linux/Nios II */
+ /* pr_cursig */
+ elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
+
+ /* pr_pid */
+ elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
+
+ /* pr_reg */
+ offset = 72;
+ size = 136;
+
+ break;
+ }
+
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ size, note->descpos + offset);
+}
+
+/* Implement elf_backend_grok_psinfo. */
+static bfd_boolean
+nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
+
+ case 124: /* Linux/Nios II elf_prpsinfo */
+ elf_tdata (abfd)->core->program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
+ elf_tdata (abfd)->core->command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
+ }
+
+ /* Note that for some reason, a spurious space is tacked
+ onto the end of the args in some (at least one anyway)
+ implementations, so strip it off if it exists. */
+
+ {
+ char *command = elf_tdata (abfd)->core->command;
+ int n = strlen (command);
+
+ if (0 < n && command[n - 1] == ' ')
+ command[n - 1] = '\0';
+ }
+
+ return TRUE;
+}
+
+/* Assorted hash table functions. */
+
+/* Initialize an entry in the stub hash table. */
+static struct bfd_hash_entry *
+stub_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = bfd_hash_allocate (table,
+ sizeof (struct elf32_nios2_stub_hash_entry));
+ if (entry == NULL)
+ return entry;
+ }
+
+ /* Call the allocation method of the superclass. */
+ entry = bfd_hash_newfunc (entry, table, string);
+ if (entry != NULL)
+ {
+ struct elf32_nios2_stub_hash_entry *hsh;
+
+ /* Initialize the local fields. */
+ hsh = (struct elf32_nios2_stub_hash_entry *) entry;
+ hsh->stub_sec = NULL;
+ hsh->stub_offset = 0;
+ hsh->target_value = 0;
+ hsh->target_section = NULL;
+ hsh->stub_type = nios2_stub_none;
+ hsh->hh = NULL;
+ hsh->id_sec = NULL;
+ }
+
+ return entry;
+}
+
+/* Create an entry in a Nios II ELF linker hash table. */
+static struct bfd_hash_entry *
+link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table, const char *string)
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = bfd_hash_allocate (table,
+ sizeof (struct elf32_nios2_link_hash_entry));
+ if (entry == NULL)
+ return entry;
+ }
-/* Nios II ELF linker hash table. */
-struct elf32_nios2_link_hash_table
- {
- /* The main hash table. */
- struct elf_link_hash_table root;
+ /* Call the allocation method of the superclass. */
+ entry = _bfd_elf_link_hash_newfunc (entry, table, string);
+ if (entry)
+ {
+ struct elf32_nios2_link_hash_entry *eh;
- /* Short-cuts to get to dynamic linker sections. */
- asection *sdynbss;
- asection *srelbss;
- asection *sbss;
+ eh = (struct elf32_nios2_link_hash_entry *) entry;
+ eh->hsh_cache = NULL;
+ eh->dyn_relocs = NULL;
+ eh->tls_type = GOT_UNKNOWN;
+ eh->got_types_used = 0;
+ }
- union {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } tls_ldm_got;
+ return entry;
+}
- /* Small local sym cache. */
- struct sym_cache sym_cache;
+/* Section name for stubs is the associated section name plus this
+ string. */
+#define STUB_SUFFIX ".stub"
+
+/* Build a name for an entry in the stub hash table. */
+static char *
+nios2_stub_name (const asection *input_section,
+ const asection *sym_sec,
+ const struct elf32_nios2_link_hash_entry *hh,
+ const Elf_Internal_Rela *rel,
+ enum elf32_nios2_stub_type stub_type)
+{
+ char *stub_name;
+ bfd_size_type len;
+ char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a';
- bfd_vma res_n_size;
- };
+ if (hh)
+ {
+ len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1;
+ stub_name = bfd_malloc (len);
+ if (stub_name != NULL)
+ {
+ sprintf (stub_name, "%08x_%c_%s+%x",
+ input_section->id & 0xffffffff,
+ stubpos,
+ hh->root.root.root.string,
+ (int) rel->r_addend & 0xffffffff);
+ }
+ }
+ else
+ {
+ len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1;
+ stub_name = bfd_malloc (len);
+ if (stub_name != NULL)
+ {
+ sprintf (stub_name, "%08x_%c_%x:%x+%x",
+ input_section->id & 0xffffffff,
+ stubpos,
+ sym_sec->id & 0xffffffff,
+ (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
+ (int) rel->r_addend & 0xffffffff);
+ }
+ }
+ return stub_name;
+}
-struct nios2_elf32_obj_tdata
+/* Look up an entry in the stub hash. Stub entries are cached because
+ creating the stub name takes a bit of time. */
+static struct elf32_nios2_stub_hash_entry *
+nios2_get_stub_entry (const asection *input_section,
+ const asection *sym_sec,
+ struct elf32_nios2_link_hash_entry *hh,
+ const Elf_Internal_Rela *rel,
+ struct elf32_nios2_link_hash_table *htab,
+ enum elf32_nios2_stub_type stub_type)
{
- struct elf_obj_tdata root;
+ struct elf32_nios2_stub_hash_entry *hsh;
+ const asection *id_sec;
+
+ /* If this input section is part of a group of sections sharing one
+ stub section, then use the id of the first/last section in the group,
+ depending on the stub section placement relative to the group.
+ Stub names need to include a section id, as there may well be
+ more than one stub used to reach say, printf, and we need to
+ distinguish between them. */
+ if (stub_type == nios2_stub_call26_before)
+ id_sec = htab->stub_group[input_section->id].first_sec;
+ else
+ id_sec = htab->stub_group[input_section->id].last_sec;
- /* tls_type for each local got entry. */
- char *local_got_tls_type;
+ if (hh != NULL && hh->hsh_cache != NULL
+ && hh->hsh_cache->hh == hh
+ && hh->hsh_cache->id_sec == id_sec
+ && hh->hsh_cache->stub_type == stub_type)
+ {
+ hsh = hh->hsh_cache;
+ }
+ else
+ {
+ char *stub_name;
- /* TRUE if TLS GD relocs have been seen for this object. */
- bfd_boolean has_tlsgd;
-};
+ stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type);
+ if (stub_name == NULL)
+ return NULL;
-#define elf32_nios2_tdata(abfd) \
- ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
+ hsh = nios2_stub_hash_lookup (&htab->bstab,
+ stub_name, FALSE, FALSE);
-#define elf32_nios2_local_got_tls_type(abfd) \
- (elf32_nios2_tdata (abfd)->local_got_tls_type)
+ if (hh != NULL)
+ hh->hsh_cache = hsh;
-/* The name of the dynamic interpreter. This is put in the .interp
- section. */
-#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
+ free (stub_name);
+ }
-/* PLT implementation for position-dependent code. */
-static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */
- 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
- 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
- 0x7800683a /* jmp r15 */
-};
+ return hsh;
+}
-static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */
- 0x03800034, /* movhi r14, %hiadj(res_0) */
- 0x73800004, /* addi r14, r14, %lo(res_0) */
- 0x7b9fc83a, /* sub r15, r15, r14 */
- 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
- 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
- 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
- 0x6800683a /* jmp r13 */
-};
+/* Add a new stub entry to the stub hash. Not all fields of the new
+ stub entry are initialised. */
+static struct elf32_nios2_stub_hash_entry *
+nios2_add_stub (const char *stub_name,
+ asection *section,
+ struct elf32_nios2_link_hash_table *htab,
+ enum elf32_nios2_stub_type stub_type)
+{
+ asection *link_sec;
+ asection *stub_sec;
+ asection **secptr, **linkptr;
+ struct elf32_nios2_stub_hash_entry *hsh;
+ bfd_boolean afterp;
-/* PLT implementation for position-independent code. */
-static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */
- 0x03c00034, /* movhi r15, %hiadj(index * 4) */
- 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
- 0x00000006 /* br .PLTresolve */
-};
+ if (stub_type == nios2_stub_call26_before)
+ {
+ link_sec = htab->stub_group[section->id].first_sec;
+ secptr = &(htab->stub_group[section->id].first_stub_sec);
+ linkptr = &(htab->stub_group[link_sec->id].first_stub_sec);
+ afterp = FALSE;
+ }
+ else
+ {
+ link_sec = htab->stub_group[section->id].last_sec;
+ secptr = &(htab->stub_group[section->id].last_stub_sec);
+ linkptr = &(htab->stub_group[link_sec->id].last_stub_sec);
+ afterp = TRUE;
+ }
+ stub_sec = *secptr;
+ if (stub_sec == NULL)
+ {
+ stub_sec = *linkptr;
+ if (stub_sec == NULL)
+ {
+ size_t namelen;
+ bfd_size_type len;
+ char *s_name;
+
+ namelen = strlen (link_sec->name);
+ len = namelen + sizeof (STUB_SUFFIX);
+ s_name = bfd_alloc (htab->stub_bfd, len);
+ if (s_name == NULL)
+ return NULL;
+
+ memcpy (s_name, link_sec->name, namelen);
+ memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
+
+ stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp);
+ if (stub_sec == NULL)
+ return NULL;
+ *linkptr = stub_sec;
+ }
+ *secptr = stub_sec;
+ }
-static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */
- 0x001ce03a, /* nextpc r14 */
- 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
- 0x6b9b883a, /* add r13, r13, r14 */
- 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
- 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
- 0x6800683a /* jmp r13 */
-};
+ /* Enter this entry into the linker stub hash table. */
+ hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name,
+ TRUE, FALSE);
+ if (hsh == NULL)
+ {
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%B: cannot create stub entry %s"),
+ section->owner,
+ stub_name);
+ return NULL;
+ }
+
+ hsh->stub_sec = stub_sec;
+ hsh->stub_offset = 0;
+ hsh->id_sec = link_sec;
+ return hsh;
+}
+
+/* Set up various things so that we can make a list of input sections
+ for each output section included in the link. Returns -1 on error,
+ 0 when no stubs will be needed, and 1 on success. */
+int
+nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
+{
+ bfd *input_bfd;
+ unsigned int bfd_count;
+ unsigned int top_id, top_index;
+ asection *section;
+ asection **input_list, **list;
+ bfd_size_type amt;
+ struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
+
+ /* Count the number of input BFDs and find the top input section id. */
+ for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link.next)
+ {
+ bfd_count += 1;
+ for (section = input_bfd->sections;
+ section != NULL;
+ section = section->next)
+ {
+ if (top_id < section->id)
+ top_id = section->id;
+ }
+ }
+
+ htab->bfd_count = bfd_count;
+
+ amt = sizeof (struct map_stub) * (top_id + 1);
+ htab->stub_group = bfd_zmalloc (amt);
+ if (htab->stub_group == NULL)
+ return -1;
+
+ /* We can't use output_bfd->section_count here to find the top output
+ section index as some sections may have been removed, and
+ strip_excluded_output_sections doesn't renumber the indices. */
+ for (section = output_bfd->sections, top_index = 0;
+ section != NULL;
+ section = section->next)
+ {
+ if (top_index < section->index)
+ top_index = section->index;
+ }
+
+ htab->top_index = top_index;
+ amt = sizeof (asection *) * (top_index + 1);
+ input_list = bfd_malloc (amt);
+ htab->input_list = input_list;
+ if (input_list == NULL)
+ return -1;
+
+ /* For sections we aren't interested in, mark their entries with a
+ value we can check later. */
+ list = input_list + top_index;
+ do
+ *list = bfd_abs_section_ptr;
+ while (list-- != input_list);
+
+ for (section = output_bfd->sections;
+ section != NULL;
+ section = section->next)
+ {
+ /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
+ * have PC relative relocs in them but no code flag set. */
+ if (((section->flags & SEC_CODE) != 0) ||
+ strcmp(".ctors", section->name) ||
+ strcmp(".dtors", section->name))
+ input_list[section->index] = NULL;
+ }
+
+ return 1;
+}
+
+/* The linker repeatedly calls this function for each input section,
+ in the order that input sections are linked into output sections.
+ Build lists of input sections to determine groupings between which
+ we may insert linker stubs. */
+void
+nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec)
+{
+ struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
+
+ if (isec->output_section->index <= htab->top_index)
+ {
+ asection **list = htab->input_list + isec->output_section->index;
+ if (*list != bfd_abs_section_ptr)
+ {
+ /* Steal the last_sec pointer for our list.
+ This happens to make the list in reverse order,
+ which is what we want. */
+ htab->stub_group[isec->id].last_sec = *list;
+ *list = isec;
+ }
+ }
+}
+
+/* Segment mask for CALL26 relocation relaxation. */
+#define CALL26_SEGMENT(x) ((x) & 0xf0000000)
+
+/* Fudge factor for approximate maximum size of all stubs that might
+ be inserted by the linker. This does not actually limit the number
+ of stubs that might be inserted, and only affects strategy for grouping
+ and placement of stubs. Perhaps this should be computed based on number
+ of relocations seen, or be specifiable on the command line. */
+#define MAX_STUB_SECTION_SIZE 0xffff
+
+/* See whether we can group stub sections together. Grouping stub
+ sections may result in fewer stubs. More importantly, we need to
+ put all .init* and .fini* stubs at the end of the .init or
+ .fini output sections respectively, because glibc splits the
+ _init and _fini functions into multiple parts. Putting a stub in
+ the middle of a function is not a good idea.
+ Rather than computing groups of a maximum fixed size, for Nios II
+ CALL26 relaxation it makes more sense to compute the groups based on
+ sections that fit within a 256MB address segment. Also do not allow
+ a group to span more than one output section, since different output
+ sections might correspond to different memory banks on a bare-metal
+ target, etc. */
+static void
+group_sections (struct elf32_nios2_link_hash_table *htab)
+{
+ asection **list = htab->input_list + htab->top_index;
+ do
+ {
+ /* The list is in reverse order so we'll search backwards looking
+ for the first section that begins in the same memory segment,
+ marking sections along the way to point at the tail for this
+ group. */
+ asection *tail = *list;
+ if (tail == bfd_abs_section_ptr)
+ continue;
+ while (tail != NULL)
+ {
+ bfd_vma start = tail->output_section->vma + tail->output_offset;
+ bfd_vma end = start + tail->size;
+ bfd_vma segment = CALL26_SEGMENT (end);
+ asection *prev;
+
+ if (segment != CALL26_SEGMENT (start)
+ || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE))
+ /* This section spans more than one memory segment, or is
+ close enough to the end of the segment that adding stub
+ sections before it might cause it to move so that it
+ spans memory segments, or that stubs added at the end of
+ this group might overflow into the next memory segment.
+ Put it in a group by itself to localize the effects. */
+ {
+ prev = htab->stub_group[tail->id].last_sec;
+ htab->stub_group[tail->id].last_sec = tail;
+ htab->stub_group[tail->id].first_sec = tail;
+ }
+ else
+ /* Collect more sections for this group. */
+ {
+ asection *curr, *first;
+ for (curr = tail; ; curr = prev)
+ {
+ prev = htab->stub_group[curr->id].last_sec;
+ if (!prev
+ || tail->output_section != prev->output_section
+ || (CALL26_SEGMENT (prev->output_section->vma
+ + prev->output_offset)
+ != segment))
+ break;
+ }
+ first = curr;
+ for (curr = tail; ; curr = prev)
+ {
+ prev = htab->stub_group[curr->id].last_sec;
+ htab->stub_group[curr->id].last_sec = tail;
+ htab->stub_group[curr->id].first_sec = first;
+ if (curr == first)
+ break;
+ }
+ }
+
+ /* Reset tail for the next group. */
+ tail = prev;
+ }
+ }
+ while (list-- != htab->input_list);
+ free (htab->input_list);
+}
+
+/* Determine the type of stub needed, if any, for a call. */
+static enum elf32_nios2_stub_type
+nios2_type_of_stub (asection *input_sec,
+ const Elf_Internal_Rela *rel,
+ struct elf32_nios2_link_hash_entry *hh,
+ struct elf32_nios2_link_hash_table *htab,
+ bfd_vma destination,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+ bfd_vma location, segment, start, end;
+ asection *s0, *s1, *s;
+
+ if (hh != NULL &&
+ !(hh->root.root.type == bfd_link_hash_defined
+ || hh->root.root.type == bfd_link_hash_defweak))
+ return nios2_stub_none;
+
+ /* Determine where the call point is. */
+ location = (input_sec->output_section->vma
+ + input_sec->output_offset + rel->r_offset);
+ segment = CALL26_SEGMENT (location);
+
+ /* Nios II CALL and JMPI instructions can transfer control to addresses
+ within the same 256MB segment as the PC. */
+ if (segment == CALL26_SEGMENT (destination))
+ return nios2_stub_none;
+
+ /* Find the start and end addresses of the stub group. Also account for
+ any already-created stub sections for this group. Note that for stubs
+ in the end section, only the first instruction of the last stub
+ (12 bytes long) needs to be within range. */
+ s0 = htab->stub_group[input_sec->id].first_sec;
+ s = htab->stub_group[s0->id].first_stub_sec;
+ if (s != NULL && s->size > 0)
+ start = s->output_section->vma + s->output_offset;
+ else
+ start = s0->output_section->vma + s0->output_offset;
+
+ s1 = htab->stub_group[input_sec->id].last_sec;
+ s = htab->stub_group[s1->id].last_stub_sec;
+ if (s != NULL && s->size > 0)
+ end = s->output_section->vma + s->output_offset + s->size - 8;
+ else
+ end = s1->output_section->vma + s1->output_offset + s1->size;
+
+ BFD_ASSERT (start < end);
+ BFD_ASSERT (start <= location);
+ BFD_ASSERT (location < end);
+
+ /* Put stubs at the end of the group unless that is not a valid
+ location and the beginning of the group is. It might be that
+ neither the beginning nor end works if we have an input section
+ so large that it spans multiple segment boundaries. In that
+ case, punt; the end result will be a relocation overflow error no
+ matter what we do here.
+
+ Note that adding stubs pushes up the addresses of all subsequent
+ sections, so that stubs allocated on one pass through the
+ relaxation loop may not be valid on the next pass. (E.g., we may
+ allocate a stub at the beginning of the section on one pass and
+ find that the call site has been bumped into the next memory
+ segment on the next pass.) The important thing to note is that
+ we never try to reclaim the space allocated to such unused stubs,
+ so code size and section addresses can only increase with each
+ iteration. Accounting for the start and end addresses of the
+ already-created stub sections ensures that when the algorithm
+ converges, it converges accurately, with the entire appropriate
+ stub section accessible from the call site and not just the
+ address at the start or end of the stub group proper. */
+
+ if (segment == CALL26_SEGMENT (end))
+ return nios2_stub_call26_after;
+ else if (segment == CALL26_SEGMENT (start))
+ return nios2_stub_call26_before;
+ else
+ /* Perhaps this should be a dedicated error code. */
+ return nios2_stub_none;
+}
-/* Implement elf_backend_grok_prstatus:
- Support for core dump NOTE sections. */
static bfd_boolean
-nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
{
- int offset;
- size_t size;
+ struct elf32_nios2_stub_hash_entry *hsh
+ = (struct elf32_nios2_stub_hash_entry *) gen_entry;
+ asection *stub_sec = hsh->stub_sec;
+ bfd_vma sym_value;
- switch (note->descsz)
+ /* Make a note of the offset within the stubs for this entry. */
+ hsh->stub_offset = stub_sec->size;
+
+ switch (hsh->stub_type)
+ {
+ case nios2_stub_call26_before:
+ case nios2_stub_call26_after:
+ /* A call26 stub looks like:
+ orhi at, %hiadj(dest)
+ addi at, at, %lo(dest)
+ jmp at
+ Note that call/jmpi instructions can't be used in PIC code
+ so there is no reason for the stub to be PIC, either. */
+ sym_value = (hsh->target_value
+ + hsh->target_section->output_offset
+ + hsh->target_section->output_section->vma
+ + hsh->addend);
+
+ nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry,
+ hsh->stub_offset, 3);
+ nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset,
+ hiadj (sym_value));
+ nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4,
+ (sym_value & 0xffff));
+ stub_sec->size += 12;
+ break;
+ default:
+ BFD_FAIL ();
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/* As above, but don't actually build the stub. Just bump offset so
+ we know stub section sizes. */
+static bfd_boolean
+nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
+{
+ struct elf32_nios2_stub_hash_entry *hsh
+ = (struct elf32_nios2_stub_hash_entry *) gen_entry;
+
+ switch (hsh->stub_type)
{
+ case nios2_stub_call26_before:
+ case nios2_stub_call26_after:
+ hsh->stub_sec->size += 12;
+ break;
default:
+ BFD_FAIL ();
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* Read in all local syms for all input bfds.
+ Returns -1 on error, 0 otherwise. */
+
+static int
+get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
+ struct bfd_link_info *info)
+{
+ unsigned int bfd_indx;
+ Elf_Internal_Sym *local_syms, **all_local_syms;
+ struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
+
+ /* We want to read in symbol extension records only once. To do this
+ we need to read in the local symbols in parallel and save them for
+ later use; so hold pointers to the local symbols in an array. */
+ bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
+ all_local_syms = bfd_zmalloc (amt);
+ htab->all_local_syms = all_local_syms;
+ if (all_local_syms == NULL)
+ return -1;
+
+ /* Walk over all the input BFDs, swapping in local symbols. */
+ for (bfd_indx = 0;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link.next, bfd_indx++)
+ {
+ Elf_Internal_Shdr *symtab_hdr;
+
+ /* We'll need the symbol table in a second. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (symtab_hdr->sh_info == 0)
+ continue;
+
+ /* We need an array of the local symbols attached to the input bfd. */
+ local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (local_syms == NULL)
+ {
+ local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ /* Cache them for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) local_syms;
+ }
+ if (local_syms == NULL)
+ return -1;
+
+ all_local_syms[bfd_indx] = local_syms;
+ }
+
+ return 0;
+}
+
+/* Determine and set the size of the stub section for a final link. */
+bfd_boolean
+nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd,
+ struct bfd_link_info *info,
+ asection *(*add_stub_section) (const char *,
+ asection *, bfd_boolean),
+ void (*layout_sections_again) (void))
+{
+ bfd_boolean stub_changed = FALSE;
+ struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
+
+ /* Stash our params away. */
+ htab->stub_bfd = stub_bfd;
+ htab->add_stub_section = add_stub_section;
+ htab->layout_sections_again = layout_sections_again;
+
+ /* FIXME: We only compute the section groups once. This could cause
+ problems if adding a large stub section causes following sections,
+ or parts of them, to move into another segment. However, this seems
+ to be consistent with the way other back ends handle this.... */
+ group_sections (htab);
+
+ if (get_local_syms (output_bfd, info->input_bfds, info))
+ {
+ if (htab->all_local_syms)
+ goto error_ret_free_local;
return FALSE;
+ }
+
+ while (1)
+ {
+ bfd *input_bfd;
+ unsigned int bfd_indx;
+ asection *stub_sec;
+
+ for (input_bfd = info->input_bfds, bfd_indx = 0;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link.next, bfd_indx++)
+ {
+ Elf_Internal_Shdr *symtab_hdr;
+ asection *section;
+ Elf_Internal_Sym *local_syms;
+
+ /* We'll need the symbol table in a second. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (symtab_hdr->sh_info == 0)
+ continue;
+
+ local_syms = htab->all_local_syms[bfd_indx];
+
+ /* Walk over each section attached to the input bfd. */
+ for (section = input_bfd->sections;
+ section != NULL;
+ section = section->next)
+ {
+ Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
+
+ /* If there aren't any relocs, then there's nothing more
+ to do. */
+ if ((section->flags & SEC_RELOC) == 0
+ || section->reloc_count == 0)
+ continue;
+
+ /* If this section is a link-once section that will be
+ discarded, then don't create any stubs. */
+ if (section->output_section == NULL
+ || section->output_section->owner != output_bfd)
+ continue;
+
+ /* Get the relocs. */
+ internal_relocs
+ = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
+ info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_ret_free_local;
+
+ /* Now examine each relocation. */
+ irela = internal_relocs;
+ irelaend = irela + section->reloc_count;
+ for (; irela < irelaend; irela++)
+ {
+ unsigned int r_type, r_indx;
+ enum elf32_nios2_stub_type stub_type;
+ struct elf32_nios2_stub_hash_entry *hsh;
+ asection *sym_sec;
+ bfd_vma sym_value;
+ bfd_vma destination;
+ struct elf32_nios2_link_hash_entry *hh;
+ char *stub_name;
+ const asection *id_sec;
+
+ r_type = ELF32_R_TYPE (irela->r_info);
+ r_indx = ELF32_R_SYM (irela->r_info);
+
+ if (r_type >= (unsigned int) R_NIOS2_ILLEGAL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ error_ret_free_internal:
+ if (elf_section_data (section)->relocs == NULL)
+ free (internal_relocs);
+ goto error_ret_free_local;
+ }
+
+ /* Only look for stubs on CALL and JMPI instructions. */
+ if (r_type != (unsigned int) R_NIOS2_CALL26)
+ continue;
+
+ /* Now determine the call target, its name, value,
+ section. */
+ sym_sec = NULL;
+ sym_value = 0;
+ destination = 0;
+ hh = NULL;
+ if (r_indx < symtab_hdr->sh_info)
+ {
+ /* It's a local symbol. */
+ Elf_Internal_Sym *sym;
+ Elf_Internal_Shdr *hdr;
+ unsigned int shndx;
+
+ sym = local_syms + r_indx;
+ if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
+ sym_value = sym->st_value;
+ shndx = sym->st_shndx;
+ if (shndx < elf_numsections (input_bfd))
+ {
+ hdr = elf_elfsections (input_bfd)[shndx];
+ sym_sec = hdr->bfd_section;
+ destination = (sym_value + irela->r_addend
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ }
+ }
+ else
+ {
+ /* It's an external symbol. */
+ int e_indx;
+
+ e_indx = r_indx - symtab_hdr->sh_info;
+ hh = ((struct elf32_nios2_link_hash_entry *)
+ elf_sym_hashes (input_bfd)[e_indx]);
+
+ while (hh->root.root.type == bfd_link_hash_indirect
+ || hh->root.root.type == bfd_link_hash_warning)
+ hh = ((struct elf32_nios2_link_hash_entry *)
+ hh->root.root.u.i.link);
+
+ if (hh->root.root.type == bfd_link_hash_defined
+ || hh->root.root.type == bfd_link_hash_defweak)
+ {
+ sym_sec = hh->root.root.u.def.section;
+ sym_value = hh->root.root.u.def.value;
+
+ if (sym_sec->output_section != NULL)
+ destination = (sym_value + irela->r_addend
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ else
+ continue;
+ }
+ else if (hh->root.root.type == bfd_link_hash_undefweak)
+ {
+ if (! bfd_link_pic (info))
+ continue;
+ }
+ else if (hh->root.root.type == bfd_link_hash_undefined)
+ {
+ if (! (info->unresolved_syms_in_objects == RM_IGNORE
+ && (ELF_ST_VISIBILITY (hh->root.other)
+ == STV_DEFAULT)))
+ continue;
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
+ }
+ }
+
+ /* Determine what (if any) linker stub is needed. */
+ stub_type = nios2_type_of_stub (section, irela, hh, htab,
+ destination, info);
+ if (stub_type == nios2_stub_none)
+ continue;
+
+ /* Support for grouping stub sections. */
+ if (stub_type == nios2_stub_call26_before)
+ id_sec = htab->stub_group[section->id].first_sec;
+ else
+ id_sec = htab->stub_group[section->id].last_sec;
+
+ /* Get the name of this stub. */
+ stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela,
+ stub_type);
+ if (!stub_name)
+ goto error_ret_free_internal;
+
+ hsh = nios2_stub_hash_lookup (&htab->bstab,
+ stub_name,
+ FALSE, FALSE);
+ if (hsh != NULL)
+ {
+ /* The proper stub has already been created. */
+ free (stub_name);
+ continue;
+ }
+
+ hsh = nios2_add_stub (stub_name, section, htab, stub_type);
+ if (hsh == NULL)
+ {
+ free (stub_name);
+ goto error_ret_free_internal;
+ }
+ hsh->target_value = sym_value;
+ hsh->target_section = sym_sec;
+ hsh->stub_type = stub_type;
+ hsh->hh = hh;
+ hsh->addend = irela->r_addend;
+ stub_changed = TRUE;
+ }
- case 212: /* Linux/Nios II */
- /* pr_cursig */
- elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
+ /* We're done with the internal relocs, free them. */
+ if (elf_section_data (section)->relocs == NULL)
+ free (internal_relocs);
+ }
+ }
- /* pr_pid */
- elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
+ if (!stub_changed)
+ break;
- /* pr_reg */
- offset = 72;
- size = 136;
+ /* OK, we've added some stubs. Find out the new size of the
+ stub sections. */
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ stub_sec->size = 0;
- break;
+ bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab);
+
+ /* Ask the linker to do its stuff. */
+ (*htab->layout_sections_again) ();
+ stub_changed = FALSE;
}
- /* Make a ".reg/999" section. */
- return _bfd_elfcore_make_pseudosection (abfd, ".reg",
- size, note->descpos + offset);
+ free (htab->all_local_syms);
+ return TRUE;
+
+ error_ret_free_local:
+ free (htab->all_local_syms);
+ return FALSE;
}
-/* Implement elf_backend_grok_psinfo. */
-static bfd_boolean
-nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+/* Build all the stubs associated with the current output file. The
+ stubs are kept in a hash table attached to the main linker hash
+ table. This function is called via nios2elf_finish in the linker. */
+bfd_boolean
+nios2_elf32_build_stubs (struct bfd_link_info *info)
{
- switch (note->descsz)
- {
- default:
- return FALSE;
-
- case 124: /* Linux/Nios II elf_prpsinfo */
- elf_tdata (abfd)->core->program
- = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
- elf_tdata (abfd)->core->command
- = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
- }
+ asection *stub_sec;
+ struct bfd_hash_table *table;
+ struct elf32_nios2_link_hash_table *htab;
- /* Note that for some reason, a spurious space is tacked
- onto the end of the args in some (at least one anyway)
- implementations, so strip it off if it exists. */
+ htab = elf32_nios2_hash_table (info);
- {
- char *command = elf_tdata (abfd)->core->command;
- int n = strlen (command);
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ /* The stub_bfd may contain non-stub sections if it is also the
+ dynobj. Any such non-stub sections are created with the
+ SEC_LINKER_CREATED flag set, while stub sections do not
+ have that flag. Ignore any non-stub sections here. */
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
+ {
+ bfd_size_type size;
+
+ /* Allocate memory to hold the linker stubs. */
+ size = stub_sec->size;
+ stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
+ if (stub_sec->contents == NULL && size != 0)
+ return FALSE;
+ stub_sec->size = 0;
+ }
- if (0 < n && command[n - 1] == ' ')
- command[n - 1] = '\0';
- }
+ /* Build the stubs as directed by the stub hash table. */
+ table = &htab->bstab;
+ bfd_hash_traverse (table, nios2_build_one_stub, info);
return TRUE;
}
-/* Create an entry in a Nios II ELF linker hash table. */
-static struct bfd_hash_entry *
-link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table, const char *string)
+
+#define is_nios2_elf(bfd) \
+ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
+ && elf_object_id (bfd) == NIOS2_ELF_DATA)
+
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
{
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
+ bfd *obfd = info->output_bfd;
+ flagword old_flags;
+ flagword new_flags;
+
+ if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd))
+ return TRUE;
+
+ /* Check if we have the same endianness. */
+ if (! _bfd_generic_verify_endian_match (ibfd, info))
+ return FALSE;
+
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+ if (!elf_flags_init (obfd))
{
- entry = bfd_hash_allocate (table,
- sizeof (struct elf32_nios2_link_hash_entry));
- if (entry == NULL)
- return entry;
+ /* First call, no flags set. */
+ elf_flags_init (obfd) = TRUE;
+ elf_elfheader (obfd)->e_flags = new_flags;
+
+ switch (new_flags)
+ {
+ default:
+ case EF_NIOS2_ARCH_R1:
+ bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1);
+ break;
+ case EF_NIOS2_ARCH_R2:
+ if (bfd_big_endian (ibfd))
+ {
+ _bfd_error_handler
+ (_("error: %B: Big-endian R2 is not supported."), ibfd);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2);
+ break;
+ }
}
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- if (entry)
+ /* Incompatible flags. */
+ else if (new_flags != old_flags)
{
- struct elf32_nios2_link_hash_entry *eh;
-
- eh = (struct elf32_nios2_link_hash_entry *) entry;
- eh->dyn_relocs = NULL;
- eh->tls_type = GOT_UNKNOWN;
- eh->got_types_used = 0;
+ /* So far, the only incompatible flags denote incompatible
+ architectures. */
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %B: Conflicting CPU architectures %d/%d"),
+ ibfd, new_flags, old_flags);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
}
- return entry;
+ /* Merge Tag_compatibility attributes and any common GNU ones. */
+ _bfd_elf_merge_object_attributes (ibfd, info);
+
+ return TRUE;
}
+
/* Implement bfd_elf32_bfd_reloc_type_lookup:
Given a BFD reloc type, return a howto structure. */
static reloc_howto_type *
-nios2_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+nios2_elf32_bfd_reloc_type_lookup (bfd *abfd,
bfd_reloc_code_real_type code)
{
int i;
+
for (i = 0;
i < (int) (sizeof (nios2_reloc_map) / sizeof (struct elf_reloc_map));
++i)
if (nios2_reloc_map[i].bfd_val == code)
- return &elf_nios2_howto_table_rel[(int) nios2_reloc_map[i].elf_val];
+ return lookup_howto (nios2_reloc_map[i].elf_val, abfd);
return NULL;
}
/* Implement bfd_elf32_bfd_reloc_name_lookup:
Given a reloc name, return a howto structure. */
static reloc_howto_type *
-nios2_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+nios2_elf32_bfd_reloc_name_lookup (bfd *abfd,
const char *r_name)
{
- unsigned int i;
- for (i = 0;
- i < (sizeof (elf_nios2_howto_table_rel)
- / sizeof (elf_nios2_howto_table_rel[0]));
- i++)
- if (elf_nios2_howto_table_rel[i].name
- && strcasecmp (elf_nios2_howto_table_rel[i].name, r_name) == 0)
- return &elf_nios2_howto_table_rel[i];
-
- return NULL;
+ int i;
+ reloc_howto_type *howto_tbl;
+ int howto_tbl_size;
+
+ if (BFD_IS_R2 (abfd))
+ {
+ howto_tbl = elf_nios2_r2_howto_table_rel;
+ howto_tbl_size = (int) (sizeof (elf_nios2_r2_howto_table_rel)
+ / sizeof (elf_nios2_r2_howto_table_rel[0]));
+ }
+ else
+ {
+ howto_tbl = elf_nios2_r1_howto_table_rel;
+ howto_tbl_size = (int) (sizeof (elf_nios2_r1_howto_table_rel)
+ / sizeof (elf_nios2_r1_howto_table_rel[0]));
+ }
+
+ for (i = 0; i < howto_tbl_size; i++)
+ if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0)
+ return howto_tbl + i;
+ return NULL;
}
/* Implement elf_info_to_howto:
Given a ELF32 relocation, fill in a arelent structure. */
static void
-nios2_elf32_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
+nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < R_NIOS2_ILLEGAL);
- cache_ptr->howto = &elf_nios2_howto_table_rel[r_type];
+ cache_ptr->howto = lookup_howto (r_type, abfd);
}
/* Return the base VMA address which should be subtracted from real addresses
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
gp_found = TRUE;
- *pgp = lh->u.def.value;
+ {
+ asection *sym_sec = lh->u.def.section;
+ bfd_vma sym_value = lh->u.def.value;
+
+ if (sym_sec->output_section)
+ sym_value = (sym_value + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ *pgp = sym_value;
+ }
break;
case bfd_link_hash_indirect:
case bfd_link_hash_warning:
symbol value for an external symbol if we are producing relocatable
output. */
static bfd_reloc_status_type
-nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
+nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
char **error_message, bfd_vma *pgp)
{
if (bfd_is_und_section (symbol->section) && !relocatable)
return bfd_reloc_ok;
}
-/* The usual way of loading a 32-bit constant into a Nios II register is to
- load the high 16 bits in one instruction and then add the low 16 bits with
- a signed add. This means that the high halfword needs to be adjusted to
- compensate for the sign bit of the low halfword. This function returns the
- adjusted high halfword for a given 32-bit constant. */
-static
-bfd_vma hiadj (bfd_vma symbol_value)
-{
- return ((symbol_value + 0x8000) >> 16) & 0xffff;
-}
-
/* Do the relocations that require special handling. */
static bfd_reloc_status_type
-nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
symbol_value = symbol_value + addend;
static bfd_reloc_status_type
nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
symbol_value = symbol_value + addend;
static bfd_reloc_status_type
nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
+ asection *input_section,
bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
static bfd_reloc_status_type
nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
+ asection *input_section,
bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
static bfd_reloc_status_type
nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section
- ATTRIBUTE_UNUSED,
+ asection *input_section,
bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
static bfd_reloc_status_type
nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
- /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
+ /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
so we need to subtract 4 before doing a final_link_relocate. */
symbol_value = symbol_value + addend - 4;
addend = 0;
static bfd_reloc_status_type
nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
/* Check that the relocation is in the same page as the current address. */
- if (((symbol_value + addend) & 0xf0000000)
- != ((input_section->output_section->vma + offset) & 0xf0000000))
+ if (CALL26_SEGMENT (symbol_value + addend)
+ != CALL26_SEGMENT (input_section->output_section->vma
+ + input_section->output_offset
+ + offset))
+ return bfd_reloc_overflow;
+
+ /* Check that the target address is correctly aligned on a 4-byte
+ boundary. */
+ if ((symbol_value + addend) & 0x3)
return bfd_reloc_overflow;
return _bfd_final_link_relocate (howto, abfd, input_section,
static bfd_reloc_status_type
nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
/* Because we need the output_bfd, the special handling is done
static bfd_reloc_status_type
nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
bfd_vma symbol_lo16, symbol_hi16;
static bfd_reloc_status_type
nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
bfd_vma symbol_lo16, symbol_hi16;
static bfd_reloc_status_type
nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data, bfd_vma offset,
+ asection *input_section,
+ bfd_byte *data, bfd_vma offset,
bfd_vma symbol_value, bfd_vma addend)
{
bfd_vma symbol_lo16, symbol_hi16;
changes in size of section don't screw up .align. */
static bfd_reloc_status_type
nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
- asymbol *symbol ATTRIBUTE_UNUSED,
- void *data ATTRIBUTE_UNUSED, asection *input_section,
- bfd *output_bfd,
+ asymbol *symbol ATTRIBUTE_UNUSED,
+ void *data ATTRIBUTE_UNUSED, asection *input_section,
+ bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
if (output_bfd != NULL)
}
static bfd_reloc_status_type
-nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
- bfd *output_bfd,
+nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
- bfd *output_bfd,
+ void *data, asection *input_section,
+ bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
- bfd *output_bfd,
+ void *data, asection *input_section,
+ bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
- bfd *output_bfd,
+ void *data, asection *input_section,
+ bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
- bfd *output_bfd,
+ void *data, asection *input_section,
+ bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
+ void *data, asection *input_section,
bfd *output_bfd, char **msg)
{
bfd_vma relocation;
static bfd_reloc_status_type
nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
+ void *data, asection *input_section,
bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
+ void *data, asection *input_section,
bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
static bfd_reloc_status_type
nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
+ void *data, asection *input_section,
bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
reloc_entry->addend);
}
-
+
/* Implement elf_backend_relocate_section. */
static bfd_boolean
nios2_elf32_relocate_section (bfd *output_bfd,
asection *splt;
asection *sreloc = NULL;
bfd_vma *local_got_offsets;
+ bfd_vma got_base;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
splt = htab->root.splt;
local_got_offsets = elf_local_got_offsets (input_bfd);
+ if (elf32_nios2_hash_table (info)->h_gp_got == NULL)
+ got_base = 0;
+ else
+ got_base = elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value;
+
for (rel = relocs; rel < relend; rel++)
{
reloc_howto_type *howto;
struct elf32_nios2_link_hash_entry *eh;
bfd_vma relocation;
bfd_vma gp;
- bfd_vma reloc_address;
bfd_reloc_status_type r = bfd_reloc_ok;
const char *name = NULL;
int r_type;
r_type = ELF32_R_TYPE (rel->r_info);
r_symndx = ELF32_R_SYM (rel->r_info);
- howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info));
+ howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd);
h = NULL;
sym = NULL;
sec = NULL;
}
else
{
- bfd_boolean warned;
+ bfd_boolean warned, ignored;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
- unresolved_reloc, warned);
+ unresolved_reloc, warned, ignored);
}
if (sec && discarded_section (sec))
rel, 1, relend, howto, 0, contents);
/* Nothing more to do unless this is a final link. */
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
continue;
- if (sec && sec->output_section)
- reloc_address = (sec->output_section->vma + sec->output_offset
- + rel->r_offset);
- else
- reloc_address = 0;
-
if (howto)
{
switch (howto->type)
/* Turns an absolute address into a gp-relative address. */
if (!nios2_elf_assign_gp (output_bfd, &gp, info))
{
+ bfd_vma reloc_address;
+
+ if (sec && sec->output_section)
+ reloc_address = (sec->output_section->vma
+ + sec->output_offset
+ + rel->r_offset);
+ else
+ reloc_address = 0;
+
format = _("global pointer relative relocation at address "
"0x%08x when _gp not defined\n");
sprintf (msgbuf, format, reloc_address);
else
{
bfd_vma symbol_address = rel->r_addend + relocation;
- relocation = relocation + rel->r_addend - gp;
+ relocation = symbol_address - gp;
rel->r_addend = 0;
if (((signed) relocation < -32768
|| (signed) relocation > 32767)
|| h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak))
{
+ if (h)
+ name = h->root.root.string;
+ /* xgettext:c-format */
format = _("Unable to reach %s (at 0x%08x) from the "
"global pointer (at 0x%08x) because the "
"offset (%d) is out of the allowed range, "
"-32678 to 32767.\n" );
- sprintf (msgbuf, format, name, symbol_address, gp,
+ sprintf (msgbuf, format, name, symbol_address, gp,
(signed)relocation);
msg = msgbuf;
r = bfd_reloc_outofrange;
rel->r_offset, relocation,
rel->r_addend);
}
-
break;
case R_NIOS2_UJMP:
r = nios2_elf32_do_ujmp_relocate (input_bfd, howto,
rel->r_addend);
break;
case R_NIOS2_CALL26:
+ case R_NIOS2_CALL26_NOAT:
/* If we have a call to an undefined weak symbol, we just want
to stuff a zero in the bits of the call instruction and
bypass the normal call26 relocation handling, because it'll
unresolved_reloc = FALSE;
}
+ /* Detect R_NIOS2_CALL26 relocations that would overflow the
+ 256MB segment. Replace the target with a reference to a
+ trampoline instead.
+ Note that htab->stub_group is null if relaxation has been
+ disabled by the --no-relax linker command-line option, so
+ we can use that to skip this processing entirely. */
+ if (howto->type == R_NIOS2_CALL26 && htab->stub_group)
+ {
+ bfd_vma dest = relocation + rel->r_addend;
+ enum elf32_nios2_stub_type stub_type;
+
+ eh = (struct elf32_nios2_link_hash_entry *)h;
+ stub_type = nios2_type_of_stub (input_section, rel, eh,
+ htab, dest, NULL);
+
+ if (stub_type != nios2_stub_none)
+ {
+ struct elf32_nios2_stub_hash_entry *hsh;
+
+ hsh = nios2_get_stub_entry (input_section, sec,
+ eh, rel, htab, stub_type);
+ if (hsh == NULL)
+ {
+ r = bfd_reloc_undefined;
+ break;
+ }
+
+ dest = (hsh->stub_offset
+ + hsh->stub_sec->output_offset
+ + hsh->stub_sec->output_section->vma);
+ r = nios2_elf32_do_call26_relocate (input_bfd, howto,
+ input_section,
+ contents,
+ rel->r_offset,
+ dest, 0);
+ break;
+ }
+ }
+
+ /* Normal case. */
r = nios2_elf32_do_call26_relocate (input_bfd, howto,
input_section, contents,
rel->r_offset, relocation,
case R_NIOS2_GOT16:
case R_NIOS2_CALL16:
+ case R_NIOS2_GOT_LO:
+ case R_NIOS2_GOT_HA:
+ case R_NIOS2_CALL_LO:
+ case R_NIOS2_CALL_HA:
/* Relocation is to the entry for this symbol in the
global offset table. */
if (sgot == NULL)
bfd_boolean dyn;
eh = (struct elf32_nios2_link_hash_entry *)h;
- use_plt = (eh->got_types_used == CALL16_USED
+ use_plt = (eh->got_types_used == CALL_USED
&& h->plt.offset != (bfd_vma) -1);
off = h->got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
dyn = elf_hash_table (info)->dynamic_sections_created;
- if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
- || (info->shared
+ if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
+ bfd_link_pic (info),
+ h)
+ || (bfd_link_pic (info)
&& SYMBOL_REFERENCES_LOCAL (info, h))
|| (ELF_ST_VISIBILITY (h->other)
&& h->root.type == bfd_link_hash_undefweak))
bfd_put_32 (output_bfd, relocation,
sgot->contents + off);
- if (info->shared)
+ if (bfd_link_pic (info))
{
asection *srelgot;
Elf_Internal_Rela outrel;
}
}
- if (use_plt && info->shared)
+ if (use_plt && bfd_link_pic (info))
{
off = ((h->plt.offset - 24) / 12 + 3) * 4;
- relocation = htab->root.sgotplt->output_offset + off;
+ relocation = (htab->root.sgotplt->output_offset + off
+ - got_base);
}
else
- relocation = sgot->output_offset + off;
+ relocation = sgot->output_offset + off - got_base;
/* This relocation does not use the addend. */
rel->r_addend = 0;
- r = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset,
- relocation, rel->r_addend);
+ switch (howto->type)
+ {
+ case R_NIOS2_GOT_LO:
+ case R_NIOS2_CALL_LO:
+ r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
+ input_section, contents,
+ rel->r_offset, relocation,
+ rel->r_addend);
+ break;
+ case R_NIOS2_GOT_HA:
+ case R_NIOS2_CALL_HA:
+ r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
+ input_section, contents,
+ rel->r_offset,
+ relocation,
+ rel->r_addend);
+ break;
+ default:
+ r = _bfd_final_link_relocate (howto, input_bfd,
+ input_section, contents,
+ rel->r_offset, relocation,
+ rel->r_addend);
+ break;
+ }
break;
case R_NIOS2_GOTOFF_LO:
case R_NIOS2_GOTOFF_HA:
case R_NIOS2_GOTOFF:
- /* Relocation is relative to the start of the
- global offset table. */
+ /* Relocation is relative to the global offset table pointer. */
BFD_ASSERT (sgot != NULL);
if (sgot == NULL)
}
/* Note that sgot->output_offset is not involved in this
- calculation. We always want the start of .got. If we
- define _GLOBAL_OFFSET_TABLE in a different way, as is
- permitted by the ABI, we might have to change this
- calculation. */
+ calculation. We always want the start of .got. */
relocation -= sgot->output_section->vma;
+
+ /* Now we adjust the relocation to be relative to the GOT pointer
+ (the _gp_got symbol), which possibly contains the 0x8000 bias. */
+ relocation -= got_base;
+
switch (howto->type)
{
case R_NIOS2_GOTOFF_LO:
{
/* If we don't know the module number, create a relocation
for it. */
- if (info->shared)
+ if (bfd_link_pic (info))
{
Elf_Internal_Rela outrel;
bfd_byte *loc;
htab->tls_ldm_got.offset |= 1;
}
- relocation = (htab->root.sgot->output_offset + off);
+ relocation = htab->root.sgot->output_offset + off - got_base;
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
{
bfd_boolean dyn;
dyn = htab->root.dynamic_sections_created;
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
- && (!info->shared
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
+ bfd_link_pic (info),
+ h)
+ && (!bfd_link_pic (info)
|| !SYMBOL_REFERENCES_LOCAL (info, h)))
{
unresolved_reloc = FALSE;
now, and emit any relocations. If both an IE GOT and a
GD GOT are necessary, we emit the GD first. */
- if ((info->shared || indx != 0)
+ if ((bfd_link_pic (info) || indx != 0)
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak))
if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16)
off += 8;
- relocation = (htab->root.sgot->output_offset + off);
+ relocation = htab->root.sgot->output_offset + off - got_base;
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
break;
case R_NIOS2_TLS_LE16:
- if (info->shared && !info->pie)
+ if (bfd_link_dll (info))
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not "
"permitted in shared object"),
input_bfd, input_section,
break;
case R_NIOS2_BFD_RELOC_32:
- if (info->shared
+ if (bfd_link_pic (info)
&& (input_section->flags & SEC_ALLOC) != 0
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
memset (&outrel, 0, sizeof outrel);
else if (h != NULL
&& h->dynindx != -1
- && (!info->shared
- || !info->symbolic
+ && (!bfd_link_pic (info)
+ || !SYMBOLIC_BIND (info, h)
|| !h->def_regular))
{
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
switch (r)
{
case bfd_reloc_overflow:
- r = info->callbacks->reloc_overflow (info, NULL, name,
- howto->name, (bfd_vma) 0,
- input_bfd, input_section,
- rel->r_offset);
+ (*info->callbacks->reloc_overflow) (info, NULL, 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);
+ (*info->callbacks->undefined_symbol) (info, name, input_bfd,
+ input_section,
+ rel->r_offset, TRUE);
break;
case bfd_reloc_outofrange:
if (msg)
{
- r = info->callbacks->warning
- (info, msg, name, input_bfd, input_section, rel->r_offset);
+ (*info->callbacks->warning) (info, msg, name, input_bfd,
+ input_section, rel->r_offset);
return FALSE;
}
}
create_got_section (bfd *dynobj, struct bfd_link_info *info)
{
struct elf32_nios2_link_hash_table *htab;
+ struct elf_link_hash_entry *h;
htab = elf32_nios2_hash_table (info);
if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4))
return FALSE;
+ /* The Nios II ABI specifies that GOT-relative relocations are relative
+ to the linker-created symbol _gp_got, rather than using
+ _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always
+ points to the base of the GOT while _gp_got may include a bias. */
+ h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt,
+ "_gp_got");
+ elf32_nios2_hash_table (info)->h_gp_got = h;
+ if (h == NULL)
+ return FALSE;
+
return TRUE;
}
if (!htab->root.sgot && !create_got_section (dynobj, info))
return FALSE;
- _bfd_elf_create_dynamic_sections (dynobj, info);
+ if (!_bfd_elf_create_dynamic_sections (dynobj, info))
+ return FALSE;
/* In order for the two loads in a shared object .PLTresolve to share the
same %hiadj, the start of the PLT (as well as the GOT) must be aligned
to a 16-byte boundary. This is because the addresses for these loads
include the -(.plt+4) PIC correction. */
- if (!bfd_set_section_alignment (dynobj, htab->root.splt, 4))
- return FALSE;
-
- htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
- if (!htab->sdynbss)
- return FALSE;
- if (!info->shared)
- {
- htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
- if (!htab->srelbss)
- return FALSE;
- }
-
- return TRUE;
+ return bfd_set_section_alignment (dynobj, htab->root.splt, 4);
}
/* Implement elf_backend_copy_indirect_symbol:
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
}
+/* Set the right machine number for a NIOS2 ELF file. */
+
+static bfd_boolean
+nios2_elf32_object_p (bfd *abfd)
+{
+ unsigned long mach;
+
+ mach = elf_elfheader (abfd)->e_flags;
+
+ switch (mach)
+ {
+ default:
+ case EF_NIOS2_ARCH_R1:
+ bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1);
+ break;
+ case EF_NIOS2_ARCH_R2:
+ bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2);
+ break;
+ }
+
+ return TRUE;
+}
+
/* Implement elf_backend_check_relocs:
Look through the relocs for a section during the first phase. */
static bfd_boolean
asection *sreloc = NULL;
bfd_signed_vma *local_got_refcounts;
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
return TRUE;
dynobj = elf_hash_table (info)->dynobj;
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;
+
+ /* PR15323, ref flags aren't set for references in the same
+ object. */
+ h->root.non_ir_ref = 1;
}
r_type = ELF32_R_TYPE (rel->r_info);
switch (r_type)
{
case R_NIOS2_GOT16:
+ case R_NIOS2_GOT_LO:
+ case R_NIOS2_GOT_HA:
case R_NIOS2_CALL16:
+ case R_NIOS2_CALL_LO:
+ case R_NIOS2_CALL_HA:
case R_NIOS2_TLS_GD16:
case R_NIOS2_TLS_IE16:
/* This symbol requires a global offset table entry. */
{
default:
case R_NIOS2_GOT16:
+ case R_NIOS2_GOT_LO:
+ case R_NIOS2_GOT_HA:
case R_NIOS2_CALL16:
+ case R_NIOS2_CALL_LO:
+ case R_NIOS2_CALL_HA:
tls_type = GOT_NORMAL;
break;
case R_NIOS2_TLS_GD16:
}
if (srelgot == NULL
- && (h != NULL || info->shared))
+ && (h != NULL || bfd_link_pic (info)))
{
srelgot = htab->root.srelgot;
BFD_ASSERT (srelgot != NULL);
= (struct elf32_nios2_link_hash_entry *)h;
h->got.refcount++;
old_tls_type = elf32_nios2_hash_entry(h)->tls_type;
- if (r_type == R_NIOS2_CALL16)
+ if (r_type == R_NIOS2_CALL16
+ || r_type == R_NIOS2_CALL_LO
+ || r_type == R_NIOS2_CALL_HA)
{
/* Make sure a plt entry is created for this symbol if
it turns out to be a function defined by a dynamic
h->plt.refcount++;
h->needs_plt = 1;
h->type = STT_FUNC;
- eh->got_types_used |= CALL16_USED;
+ eh->got_types_used |= CALL_USED;
}
else
- eh->got_types_used |= GOT16_USED;
+ eh->got_types_used |= GOT_USED;
}
else
{
case R_NIOS2_BFD_RELOC_32:
case R_NIOS2_CALL26:
+ case R_NIOS2_CALL26_NOAT:
case R_NIOS2_HIADJ16:
case R_NIOS2_LO16:
sections have not yet been mapped to output sections.
Tentatively set the flag for now, and correct in
adjust_dynamic_symbol. */
- if (!info->shared)
+ if (!bfd_link_pic (info))
h->non_got_ref = 1;
/* Make sure a plt entry is created for this symbol if it
turns out to be a function defined by a dynamic object. */
h->plt.refcount++;
- if (r_type == R_NIOS2_CALL26)
+ if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT)
h->needs_plt = 1;
}
/* If we are creating a shared library, we need to copy the
reloc into the shared library. */
- if (info->shared
+ if (bfd_link_pic (info)
&& (sec->flags & SEC_ALLOC) != 0
&& (r_type == R_NIOS2_BFD_RELOC_32
|| (h != NULL && ! h->needs_plt
- && (! info->symbolic || ! h->def_regular))))
+ && (! SYMBOLIC_BIND (info, h) || ! h->def_regular))))
{
struct elf32_nios2_dyn_relocs *p;
struct elf32_nios2_dyn_relocs **head;
relocation. */
static asection *
nios2_elf32_gc_mark_hook (asection *sec,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info,
Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
const Elf_Internal_Rela *rel, *relend;
bfd *dynobj;
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
return TRUE;
elf_section_data (sec)->local_dynrel = NULL;
switch (r_type)
{
case R_NIOS2_GOT16:
+ case R_NIOS2_GOT_LO:
+ case R_NIOS2_GOT_HA:
case R_NIOS2_CALL16:
+ case R_NIOS2_CALL_LO:
+ case R_NIOS2_CALL_HA:
if (h != NULL)
{
if (h->got.refcount > 0)
case R_NIOS2_PCREL_HA:
case R_NIOS2_BFD_RELOC_32:
case R_NIOS2_CALL26:
+ case R_NIOS2_CALL26_NOAT:
if (h != NULL)
{
struct elf32_nios2_link_hash_entry *eh;
return TRUE;
}
-/* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
-static void
-nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value)
-{
- bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset);
-
- BFD_ASSERT(value <= 0xffff);
-
- bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6),
- sec->contents + offset);
-}
-
-/* Install COUNT 32-bit values DATA starting at offset OFFSET into
- section SEC. */
-static void
-nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset,
- int count)
-{
- while (count--)
- {
- bfd_put_32 (sec->owner, *data, sec->contents + offset);
- offset += 4;
- ++data;
- }
-}
-
/* Implement elf_backend_finish_dynamic_symbols:
Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL);
/* Emit the PLT entry. */
- if (info->shared)
+ if (bfd_link_pic (info))
{
nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset,
3);
}
}
- use_plt = (eh->got_types_used == CALL16_USED
+ use_plt = (eh->got_types_used == CALL_USED
&& h->plt.offset != (bfd_vma) -1);
if (!use_plt && h->got.offset != (bfd_vma) -1
The entry in the global offset table will already have been
initialized in the relocate_section function. */
- if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
+ if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
{
rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
rela.r_addend = bfd_get_signed_32 (output_bfd,
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak));
- s = htab->srelbss;
- BFD_ASSERT (s != NULL);
-
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY);
rela.r_addend = 0;
+ if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
+ s = htab->root.sreldynrelro;
+ else
+ s = htab->root.srelbss;
+ BFD_ASSERT (s != NULL);
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
}
- /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
+ /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || h == elf_hash_table (info)->hgot)
+ || h == elf_hash_table (info)->hgot
+ || h == elf32_nios2_hash_table (info)->h_gp_got)
sym->st_shndx = SHN_ABS;
return TRUE;
break;
case DT_PLTGOT:
- s = htab->root.sgot;
- BFD_ASSERT (s != NULL);
- dyn.d_un.d_ptr = s->output_section->vma;
+ s = htab->root.sgotplt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_JMPREL:
s = htab->root.srelplt;
- BFD_ASSERT (s != NULL);
- dyn.d_un.d_ptr = s->output_section->vma;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_PLTRELSZ:
s = htab->root.srelplt;
- BFD_ASSERT (s != NULL);
dyn.d_un.d_val = s->size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
- case DT_RELASZ:
- /* The procedure linkage table relocs (DT_JMPREL) should
- not be included in the overall relocs (DT_RELA).
- Therefore, we override the DT_RELASZ entry here to
- make it not include the JMPREL relocs. Since the
- linker script arranges for .rela.plt to follow all
- other relocation sections, we don't have to worry
- about changing the DT_RELA entry. */
- s = htab->root.srelplt;
- if (s != NULL)
- dyn.d_un.d_val -= s->size;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
-
case DT_NIOS2_GP:
- s = htab->root.sgot;
- BFD_ASSERT (s != NULL);
- dyn.d_un.d_ptr = s->output_section->vma + 0x7ff0;
+ s = htab->root.sgotplt;
+ dyn.d_un.d_ptr
+ = s->output_section->vma + s->output_offset + 0x7ff0;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
}
{
bfd_vma got_address = (sgotplt->output_section->vma
+ sgotplt->output_offset);
- if (info->shared)
+ if (bfd_link_pic (info))
{
- bfd_vma corrected = got_address - (splt->output_section->vma
- + splt->output_offset + 4);
+ bfd_vma got_pcrel = got_address - (splt->output_section->vma
+ + splt->output_offset);
+ /* Both GOT and PLT must be aligned to a 16-byte boundary
+ for the two loads to share the %hiadj part. The 4-byte
+ offset for nextpc is accounted for in the %lo offsets
+ on the loads. */
+ BFD_ASSERT ((got_pcrel & 0xf) == 0);
nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6);
- nios2_elf32_install_imm16 (splt, 4, hiadj (corrected));
- nios2_elf32_install_imm16 (splt, 12, (corrected & 0xffff) + 4);
- nios2_elf32_install_imm16 (splt, 16, (corrected & 0xffff) + 8);
-
- elf_section_data (splt->output_section)->this_hdr.sh_entsize
- = 24;
+ nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel));
+ nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff);
+ nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff);
}
else
{
6 | ((res_size - (res_offset + 4)) << 6),
splt->contents + res_offset);
+ /* The GOT must be aligned to a 16-byte boundary for the
+ two loads to share the same %hiadj part. */
+ BFD_ASSERT ((got_address & 0xf) == 0);
+
nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7);
nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start));
nios2_elf32_install_imm16 (splt, res_size + 4,
nios2_elf32_install_imm16 (splt, res_size + 12,
hiadj (got_address));
nios2_elf32_install_imm16 (splt, res_size + 16,
- (got_address & 0xffff) + 4);
+ (got_address + 4) & 0xffff);
nios2_elf32_install_imm16 (splt, res_size + 20,
- (got_address & 0xffff) + 8);
-
- elf_section_data (splt->output_section)->this_hdr.sh_entsize
- = 28 + res_size;
+ (got_address + 8) & 0xffff);
}
}
}
{
struct elf32_nios2_link_hash_table *htab;
bfd *dynobj;
- asection *s;
+ asection *s, *srel;
unsigned align2;
htab = elf32_nios2_hash_table (info);
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
- if (info->shared)
+ if (bfd_link_pic (info))
return TRUE;
if (h->size == 0)
{
- (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
- h->root.root.string);
+ _bfd_error_handler (_("dynamic variable `%s' is zero size"),
+ h->root.root.string);
return TRUE;
}
determine the address it must put in the global offset table, so
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
- s = htab->sdynbss;
- BFD_ASSERT (s != NULL);
-
/* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to
copy the initial value out of the dynamic object and into the
runtime process image. We need to remember the offset into the
.rela.bss section we are going to use. */
+ if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
+ {
+ s = htab->root.sdynrelro;
+ srel = htab->root.sreldynrelro;
+ }
+ else
+ {
+ s = htab->root.sdynbss;
+ srel = htab->root.srelbss;
+ }
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
- asection *srel;
-
- srel = htab->srelbss;
- BFD_ASSERT (srel != NULL);
srel->size += sizeof (Elf32_External_Rela);
h->needs_copy = 1;
}
&& !bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
{
asection *s = htab->root.splt;
/* Allocate room for the header. */
if (s->size == 0)
{
- if (info->shared)
+ if (bfd_link_pic (info))
s->size = 24;
else
s->size = 28;
location in the .plt. This is required to make function
pointers compare as equal between the normal executable and
the shared library. */
- if (! info->shared
+ if (! bfd_link_pic (info)
&& !h->def_regular)
{
h->root.u.def.section = s;
}
eh = (struct elf32_nios2_link_hash_entry *) h;
- use_plt = (eh->got_types_used == CALL16_USED
+ use_plt = (eh->got_types_used == CALL_USED
&& h->plt.offset != (bfd_vma) -1);
if (h->got.refcount > 0)
dyn = htab->root.dynamic_sections_created;
indx = 0;
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
- && (!info->shared
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
+ && (!bfd_link_pic (info)
|| !SYMBOL_REFERENCES_LOCAL (info, h)))
indx = h->dynindx;
if (tls_type != GOT_NORMAL
- && (info->shared || indx != 0)
+ && (bfd_link_pic (info) || indx != 0)
&& (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak))
{
else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
&& !use_plt
- && (info->shared
+ && (bfd_link_pic (info)
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
htab->root.srelgot->size += sizeof (Elf32_External_Rela);
}
space for pc-relative relocs that have become local due to symbol
visibility changes. */
- if (info->shared)
+ if (bfd_link_pic (info))
{
if (h->def_regular
- && (h->forced_local || info->symbolic))
+ && (h->forced_local || SYMBOLIC_BIND (info, h)))
{
struct elf32_nios2_dyn_relocs **pp;
if (elf_hash_table (info)->dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
- if (info->executable)
+ if (bfd_link_executable (info) && !info->nointerp)
{
s = bfd_get_linker_section (dynobj, ".interp");
BFD_ASSERT (s != NULL);
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
if (*local_tls_type == GOT_NORMAL)
s->size += 4;
- if (info->shared || *local_tls_type == GOT_TLS_GD)
+ if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD)
srel->size += sizeof (Elf32_External_Rela);
}
else
for R_NIOS2_TLS_LDM16 relocations. */
htab->tls_ldm_got.offset = htab->root.sgot->size;
htab->root.sgot->size += 8;
- if (info->shared)
+ if (bfd_link_pic (info))
htab->root.srelgot->size += sizeof (Elf32_External_Rela);
}
else
sym dynamic relocs. */
elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* If the .got section is more than 0x8000 bytes, we add
+ 0x8000 to the value of _gp_got, so that 16-bit relocations
+ have a greater chance of working. */
+ if (htab->root.sgot->size >= 0x8000
+ && elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value == 0)
+ elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value = 0x8000;
+ }
+
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
memory for them. */
of the dynobj section names depend upon the input files. */
name = bfd_get_section_name (dynobj, s);
- if (strcmp (name, ".plt") == 0)
+ if (s == htab->root.splt)
{
/* Remember whether there is a PLT. */
plt = s->size != 0;
/* Correct for the number of res_N branches. */
- if (plt && !info->shared)
+ if (plt && !bfd_link_pic (info))
{
htab->res_n_size = (s->size-28) / 3;
s->size += htab->res_n_size;
s->reloc_count = 0;
}
}
- else if (CONST_STRNEQ (name, ".got"))
- got = s->size != 0;
- else if (strcmp (name, ".dynbss") != 0)
+ else if (s == htab->root.sgot
+ || s == htab->root.sgotplt)
+ {
+ if (s->size != 0)
+ got = TRUE;
+ }
+ else if (s != htab->root.sdynbss
+ && s != htab->root.sdynrelro)
/* It's not one of our sections, so don't allocate space. */
continue;
#define add_dynamic_entry(TAG, VAL) \
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
- if (!info->shared && !add_dynamic_entry (DT_DEBUG, 0))
+ if (!bfd_link_pic (info) && !add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
if (got && !add_dynamic_entry (DT_PLTGOT, 0))
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))))
return FALSE;
- if (!info->shared && !add_dynamic_entry (DT_NIOS2_GP, 0))
+ if (!bfd_link_pic (info) && !add_dynamic_entry (DT_NIOS2_GP, 0))
return FALSE;
if ((info->flags & DF_TEXTREL) != 0
return TRUE;
}
+/* Free the derived linker hash table. */
+static void
+nios2_elf32_link_hash_table_free (bfd *obfd)
+{
+ struct elf32_nios2_link_hash_table *htab
+ = (struct elf32_nios2_link_hash_table *) obfd->link.hash;
+
+ bfd_hash_table_free (&htab->bstab);
+ _bfd_elf_link_hash_table_free (obfd);
+}
+
/* Implement bfd_elf32_bfd_link_hash_table_create. */
static struct bfd_link_hash_table *
nios2_elf32_link_hash_table_create (bfd *abfd)
return NULL;
}
+ /* Init the stub hash table too. */
+ if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc,
+ sizeof (struct elf32_nios2_stub_hash_entry)))
+ {
+ _bfd_elf_link_hash_table_free (abfd);
+ return NULL;
+ }
+ ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free;
+
return &ret->root.root;
}
static bfd_boolean
is_nios2_elf_target (const struct bfd_target *targ)
{
- return (targ == &bfd_elf32_littlenios2_vec
- || targ == &bfd_elf32_bignios2_vec);
+ return (targ == &nios2_elf32_le_vec
+ || targ == &nios2_elf32_be_vec);
}
/* Implement elf_backend_add_symbol_hook.
bfd *dynobj;
if (sym->st_shndx == SHN_COMMON
- && !info->relocatable
+ && !bfd_link_relocatable (info)
&& sym->st_size <= elf_gp_size (abfd)
&& is_nios2_elf_target (info->output_bfd->xvec))
{
#define bfd_elf32_bfd_link_hash_table_create \
nios2_elf32_link_hash_table_create
+#define bfd_elf32_bfd_merge_private_bfd_data \
+ nios2_elf32_merge_private_bfd_data
+
/* Relocation table lookup macros. */
#define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup
#define elf_backend_can_refcount 1
#define elf_backend_plt_readonly 1
#define elf_backend_want_got_plt 1
+#define elf_backend_want_dynrelro 1
#define elf_backend_rela_normal 1
+#define elf_backend_dtrel_excludes_plt 1
#define elf_backend_relocate_section nios2_elf32_relocate_section
#define elf_backend_section_flags nios2_elf32_section_flags
#define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections
#define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook
#define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol
+#define elf_backend_object_p nios2_elf32_object_p
#define elf_backend_grok_prstatus nios2_grok_prstatus
#define elf_backend_grok_psinfo nios2_grok_psinfo
#define elf_backend_special_sections elf32_nios2_special_sections
-#define TARGET_LITTLE_SYM bfd_elf32_littlenios2_vec
+#define TARGET_LITTLE_SYM nios2_elf32_le_vec
#define TARGET_LITTLE_NAME "elf32-littlenios2"
-#define TARGET_BIG_SYM bfd_elf32_bignios2_vec
+#define TARGET_BIG_SYM nios2_elf32_be_vec
#define TARGET_BIG_NAME "elf32-bignios2"
#define elf_backend_got_header_size 12
+#define elf_backend_default_execstack 0
#include "elf32-target.h"