#include "elf/ppc.h"
#include "elf64-ppc.h"
-#define USE_RELA /* we want RELA relocations, not REL. */
-
-
static void ppc_howto_init
PARAMS ((void));
static reloc_howto_type *ppc64_elf_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void ppc64_elf_info_to_howto
PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
-static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc
+static bfd_reloc_status_type ppc64_elf_ha_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc64_elf_brtaken_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc64_elf_sectoff_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc64_elf_toc_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc64_elf_toc64_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static boolean ppc64_elf_set_private_flags
- PARAMS ((bfd *, flagword));
+static bfd_reloc_status_type ppc64_elf_unhandled_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static boolean ppc64_elf_object_p
+ PARAMS ((bfd *));
static boolean ppc64_elf_merge_private_bfd_data
PARAMS ((bfd *, bfd *));
-static boolean ppc64_elf_section_from_shdr
- PARAMS ((bfd *, Elf64_Internal_Shdr *, char *));
-static struct bfd_hash_entry *link_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
- PARAMS ((bfd *));
-static boolean create_got_section
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean ppc64_elf_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static void ppc64_elf_copy_indirect_symbol
- PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
-static boolean ppc64_elf_check_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-static asection * ppc64_elf_gc_mark_hook
- PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
-static boolean ppc64_elf_gc_sweep_hook
- PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec,
- const Elf_Internal_Rela *relocs));
-static boolean func_desc_adjust
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean ppc64_elf_func_desc_adjust
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean ppc64_elf_adjust_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-static void ppc64_elf_hide_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
-static boolean allocate_dynrelocs
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean readonly_dynrelocs
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static enum elf_reloc_type_class ppc64_elf_reloc_type_class
- PARAMS ((const Elf_Internal_Rela *));
-static boolean ppc64_elf_size_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_byte *build_plt_stub
- PARAMS ((bfd *, bfd_byte *, int, int));
-static boolean build_one_stub
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean ppc64_elf_fake_sections
- PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *));
-static boolean ppc64_elf_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
- asection **));
-static boolean ppc64_elf_finish_dynamic_symbol
- PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- Elf_Internal_Sym *));
-static boolean ppc64_elf_finish_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-/* Mask to set RA in memory instructions. */
-#define RA_REGISTER_MASK 0x001f0000
-
-/* Value to shift register by to insert RA. */
-#define RA_REGISTER_SHIFT 16
-
/* The name of the dynamic interpreter. This is put in the .interp
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
/* Pad with this. */
#define NOP 0x60000000
-/* .glink entries for the first 32k functions are two instructions. */
+/* Some other nops. */
+#define CROR_151515 0x4def7b82
+#define CROR_313131 0x4ffffb82
+
+/* .glink entries for the first 32k functions are two instructions. */
#define LI_R0_0 0x38000000 /* li %r0,0 */
#define B_DOT 0x48000000 /* b . */
a branch. */
#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
+
+/* Instructions to save and restore floating point regs. */
+#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
+#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
+#define BLR 0x4e800020 /* blr */
+
+/* Since .opd is an array of descriptors and each entry will end up
+ with identical R_PPC64_RELATIVE relocs, there is really no need to
+ propagate .opd relocs; The dynamic linker should be taught to
+ relocate .opd without reloc entries. */
+#ifndef NO_OPD_RELOCS
+#define NO_OPD_RELOCS 0
+#endif
\f
+#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
+
/* Relocation HOWTO's. */
static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
/* This reloc does nothing. */
HOWTO (R_PPC64_NONE, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_NONE", /* name */
false, /* partial_inplace */
"R_PPC64_ADDR24", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0x3fffffc, /* dst_mask */
+ 0x03fffffc, /* dst_mask */
false), /* pcrel_offset */
/* A standard 16 bit relocation. */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_ha_reloc, /* special_function */
"R_PPC64_ADDR16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
"R_PPC64_ADDR14", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xfffc, /* dst_mask */
+ 0x0000fffc, /* dst_mask */
false), /* pcrel_offset */
/* An absolute 16 bit branch, for which bit 10 should be set to
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_brtaken_reloc, /* special_function */
"R_PPC64_ADDR14_BRTAKEN",/* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xfffc, /* dst_mask */
+ 0x0000fffc, /* dst_mask */
false), /* pcrel_offset */
/* An absolute 16 bit branch, for which bit 10 should be set to
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_brtaken_reloc, /* special_function */
"R_PPC64_ADDR14_BRNTAKEN",/* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xfffc, /* dst_mask */
+ 0x0000fffc, /* dst_mask */
false), /* pcrel_offset */
/* A relative 26 bit branch; the lower two bits must be zero. */
"R_PPC64_REL24", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0x3fffffc, /* dst_mask */
+ 0x03fffffc, /* dst_mask */
true), /* pcrel_offset */
/* A relative 16 bit branch; the lower two bits must be zero. */
"R_PPC64_REL14", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xfffc, /* dst_mask */
+ 0x0000fffc, /* dst_mask */
true), /* pcrel_offset */
/* A relative 16 bit branch. Bit 10 should be set to indicate that
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_brtaken_reloc, /* special_function */
"R_PPC64_REL14_BRTAKEN", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xfffc, /* dst_mask */
+ 0x0000fffc, /* dst_mask */
true), /* pcrel_offset */
/* A relative 16 bit branch. Bit 10 should be set to indicate that
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_brtaken_reloc, /* special_function */
"R_PPC64_REL14_BRNTAKEN",/* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xfffc, /* dst_mask */
+ 0x0000fffc, /* dst_mask */
true), /* pcrel_offset */
/* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GOT16", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GOT16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GOT16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GOT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
run has to have the data at some particular address. */
HOWTO (R_PPC64_COPY, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
+ 0, /* this one is variable size */
+ 0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ complain_overflow_dont, /* complain_on_overflow */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_COPY", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GLOB_DAT", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xffffffffffffffff, /* dst_mask */
+ ONES (64), /* dst_mask */
false), /* pcrel_offset */
/* Created by the link editor. Marks a procedure linkage table
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_JMP_SLOT", /* name */
false, /* partial_inplace */
0, /* src_mask */
"R_PPC64_RELATIVE", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xffffffffffffffff, /* dst_mask */
+ ONES (64), /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR32, but may be unaligned. */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
- /* FIXME: Verify. Was complain_overflow_bitfield. */
+ /* FIXME: Verify. Was complain_overflow_bitfield. */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL32", /* name */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLT32", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
+ 0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* 32-bit PC relative relocation to the symbol's procedure linkage table.
"R_PPC64_PLTREL32", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
+ 0xffffffff, /* dst_mask */
true), /* pcrel_offset */
/* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLT16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLT16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
- /* 32-bit section relative relocation. */
- /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
- dst_mask=0. */
+ /* 16-bit section relative relocation. */
HOWTO (R_PPC64_SECTOFF, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_sectoff_reloc, /* special_function */
"R_PPC64_SECTOFF", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
- true), /* pcrel_offset */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
- /* 16-bit lower half section relative relocation. */
+ /* Like R_PPC64_SECTOFF, but no overflow warning. */
HOWTO (R_PPC64_SECTOFF_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_sectoff_reloc, /* special_function */
"R_PPC64_SECTOFF_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_sectoff_reloc, /* special_function */
"R_PPC64_SECTOFF_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_sectoff_ha_reloc, /* special_function */
"R_PPC64_SECTOFF_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
false), /* pcrel_offset */
/* Like R_PPC64_REL24 without touching the two least significant
- bits. */
- /* FIXME: Verify R_PPC64_ADDR30. */
+ bits. Should have been named R_PPC64_REL30! */
HOWTO (R_PPC64_ADDR30, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
"R_PPC64_ADDR64", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xffffffffffffffff, /* dst_mask */
+ ONES (64), /* dst_mask */
false), /* pcrel_offset */
/* The bits 32-47 of an address. */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_ha_reloc, /* special_function */
"R_PPC64_ADDR16_HIGHERA", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_ha_reloc, /* special_function */
"R_PPC64_ADDR16_HIGHESTA", /* name */
false, /* partial_inplace */
0, /* src_mask */
"R_PPC64_UADDR64", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xffffffffffffffff, /* dst_mask */
+ ONES (64), /* dst_mask */
false), /* pcrel_offset */
/* 64-bit relative relocation. */
"R_PPC64_REL64", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xffffffffffffffff, /* dst_mask */
+ ONES (64), /* dst_mask */
true), /* pcrel_offset */
- /* 64-bit relocation to the symbol's procedure linkage table. */
+ /* 64-bit relocation to the symbol's procedure linkage table. */
HOWTO (R_PPC64_PLT64, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLT64", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
+ ONES (64), /* dst_mask */
false), /* pcrel_offset */
/* 64-bit PC relative relocation to the symbol's procedure linkage
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTREL64", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
+ ONES (64), /* dst_mask */
true), /* pcrel_offset */
/* 16 bit TOC-relative relocation. */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_toc_reloc, /* special_function */
"R_PPC64_TOC16", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_toc_reloc, /* special_function */
"R_PPC64_TOC16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_toc_reloc, /* special_function */
"R_PPC64_TOC16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_toc_ha_reloc, /* special_function */
"R_PPC64_TOC16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_toc64_reloc, /* special_function */
"R_PPC64_TOC", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0xffffffffffffffff, /* dst_mask */
+ ONES (64), /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_GOT16, but also informs the link editor that the
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTGOT16", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTGOT16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTGOT16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
- ppc64_elf_addr16_ha_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTGOT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GOT16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_GOT16_LO_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLT16_LO_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
false), /* pcrel_offset */
/* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
- /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
- dst_mask=0. */
HOWTO (R_PPC64_SECTOFF_DS, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_sectoff_reloc, /* special_function */
"R_PPC64_SECTOFF_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
- 0, /* dst_mask */
- true), /* pcrel_offset */
+ 0xfffc, /* dst_mask */
+ false), /* pcrel_offset */
/* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_sectoff_reloc, /* special_function */
"R_PPC64_SECTOFF_LO_DS",/* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_toc_reloc, /* special_function */
"R_PPC64_TOC16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_toc_reloc, /* special_function */
"R_PPC64_TOC16_LO_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTGOT16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_unhandled_reloc, /* special_function */
"R_PPC64_PLTGOT16_LO_DS",/* name */
false, /* partial_inplace */
0, /* src_mask */
break;
case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
break;
- case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
+ case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
break;
case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
break;
{
unsigned int type;
+ /* Initialize howto table if needed. */
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
- /* Initialize howto table if needed. */
ppc_howto_init ();
type = ELF64_R_TYPE (dst->r_info);
/* Handle the R_PPC_ADDR16_HA and similar relocs. */
static bfd_reloc_status_type
-ppc64_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
- output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
+ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ /* Adjust the addend for sign extension of the low 16 bits.
+ We won't actually be using the low 16 bits, so trashing them
+ doesn't matter. */
+ reloc_entry->addend += 0x8000;
+ return bfd_reloc_continue;
+}
+
+static bfd_reloc_status_type
+ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
arelent *reloc_entry;
asymbol *symbol;
- PTR data ATTRIBUTE_UNUSED;
+ PTR data;
asection *input_section;
bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+ char **error_message;
{
- bfd_vma relocation;
+ long insn;
+ enum elf_ppc_reloc_type r_type;
+ bfd_size_type octets;
+ /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
+ boolean is_power4 = false;
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ octets = reloc_entry->address * bfd_octets_per_byte (abfd);
+ insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
+ insn &= ~(0x01 << 21);
+ r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type;
+ if (r_type == R_PPC64_ADDR14_BRTAKEN
+ || r_type == R_PPC64_REL14_BRTAKEN)
+ insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
+
+ if (is_power4)
+ {
+ /* Set 'a' bit. This is 0b00010 in BO field for branch
+ on CR(BI) insns (BO == 001at or 011at), and 0b01000
+ for branch on CTR insns (BO == 1a00t or 1a01t). */
+ if ((insn & (0x14 << 21)) == (0x04 << 21))
+ insn |= 0x02 << 21;
+ else if ((insn & (0x14 << 21)) == (0x10 << 21))
+ insn |= 0x08 << 21;
+ else
+ return bfd_reloc_continue;
+ }
+ else
{
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
+ bfd_vma target = 0;
+ bfd_vma from;
+
+ if (!bfd_is_com_section (symbol->section))
+ target = symbol->value;
+ target += symbol->section->output_section->vma;
+ target += symbol->section->output_offset;
+ target += reloc_entry->addend;
+
+ from = (reloc_entry->address
+ + input_section->output_offset
+ + input_section->output_section->vma);
+
+ /* Invert 'y' bit if not the default. */
+ if ((bfd_signed_vma) (target - from) < 0)
+ insn ^= 0x01 << 21;
}
+ bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
+ return bfd_reloc_continue;
+}
+
+static bfd_reloc_status_type
+ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
- if (reloc_entry->address > input_section->_cooked_size)
- return bfd_reloc_outofrange;
+ /* Subtract the symbol section base address. */
+ reloc_entry->addend -= symbol->section->output_section->vma;
+ return bfd_reloc_continue;
+}
- if (bfd_is_com_section (symbol->section))
- relocation = 0;
- else
- relocation = symbol->value;
+static bfd_reloc_status_type
+ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ /* Subtract the symbol section base address. */
+ reloc_entry->addend -= symbol->section->output_section->vma;
+
+ /* Adjust the addend for sign extension of the low 16 bits. */
+ reloc_entry->addend += 0x8000;
+ return bfd_reloc_continue;
+}
+
+static bfd_reloc_status_type
+ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ bfd_vma TOCstart;
+
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
+ if (TOCstart == 0)
+ TOCstart = ppc64_elf_toc (input_section->output_section->owner);
+
+ /* Subtract the TOC base address. */
+ reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
+ return bfd_reloc_continue;
+}
+
+static bfd_reloc_status_type
+ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ bfd_vma TOCstart;
+
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
- relocation += symbol->section->output_section->vma;
- relocation += symbol->section->output_offset;
- relocation += reloc_entry->addend;
+ TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
+ if (TOCstart == 0)
+ TOCstart = ppc64_elf_toc (input_section->output_section->owner);
- reloc_entry->addend += (relocation & 0x8000) << 1;
+ /* Subtract the TOC base address. */
+ reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
+ /* Adjust the addend for sign extension of the low 16 bits. */
+ reloc_entry->addend += 0x8000;
return bfd_reloc_continue;
}
-/* Function to set whether a module needs the -mrelocatable bit set. */
+static bfd_reloc_status_type
+ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ bfd_vma TOCstart;
+ bfd_size_type octets;
+
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
+ if (TOCstart == 0)
+ TOCstart = ppc64_elf_toc (input_section->output_section->owner);
+
+ octets = reloc_entry->address * bfd_octets_per_byte (abfd);
+ bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
+ return bfd_reloc_ok;
+}
+
+static bfd_reloc_status_type
+ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ if (error_message != NULL)
+ {
+ static char buf[60];
+ sprintf (buf, "generic linker can't handle %s",
+ reloc_entry->howto->name);
+ *error_message = buf;
+ }
+ return bfd_reloc_dangerous;
+}
+
+/* Fix bad default arch selected for a 64 bit input bfd when the
+ default is 32 bit. */
static boolean
-ppc64_elf_set_private_flags (abfd, flags)
+ppc64_elf_object_p (abfd)
bfd *abfd;
- flagword flags;
{
- BFD_ASSERT (!elf_flags_init (abfd)
- || elf_elfheader (abfd)->e_flags == flags);
+ if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
+ {
+ Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = true;
+ if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
+ {
+ /* Relies on arch after 32 bit default being 64 bit default. */
+ abfd->arch_info = abfd->arch_info->next;
+ BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
+ }
+ }
return true;
}
/* Merge backend specific data from an object file to the output
object file when linking. */
+
static boolean
ppc64_elf_merge_private_bfd_data (ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
- flagword old_flags;
- flagword new_flags;
- boolean error;
-
/* Check if we have the same endianess. */
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
return false;
}
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
-
- new_flags = elf_elfheader (ibfd)->e_flags;
- old_flags = elf_elfheader (obfd)->e_flags;
- if (!elf_flags_init (obfd))
- {
- /* First call, no flags set. */
- elf_flags_init (obfd) = true;
- elf_elfheader (obfd)->e_flags = new_flags;
- }
+ return true;
+}
+\f
+/* The following functions are specific to the ELF linker, while
+ functions above are used generally. Those named ppc64_elf_* are
+ called by the main ELF linker code. They appear in this file more
+ or less in the order in which they are called. eg.
+ ppc64_elf_check_relocs is called early in the link process,
+ ppc64_elf_finish_dynamic_sections is one of the last functions
+ called.
- else if (new_flags == old_flags)
- /* Compatible flags are ok. */
- ;
-
- else
- {
- /* Incompatible flags. Warn about -mrelocatable mismatch.
- Allow -mrelocatable-lib to be linked with either. */
- error = false;
- if ((new_flags & EF_PPC_RELOCATABLE) != 0
- && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
- {
- error = true;
- (*_bfd_error_handler)
- (_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
- bfd_archive_filename (ibfd));
- }
- else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
- && (old_flags & EF_PPC_RELOCATABLE) != 0)
- {
- error = true;
- (*_bfd_error_handler)
- (_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
- bfd_archive_filename (ibfd));
- }
-
- /* The output is -mrelocatable-lib iff both the input files are. */
- if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
- elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
-
- /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
- but each input file is either -mrelocatable or -mrelocatable-lib. */
- if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
- && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
- && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
- elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
-
- /* Do not warn about eabi vs. V.4 mismatch, just or in the bit
- if any module uses it. */
- elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
-
- new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
- old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
-
- /* Warn about any other mismatches. */
- if (new_flags != old_flags)
- {
- error = true;
- (*_bfd_error_handler)
- (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
- bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
- }
-
- if (error)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- }
-
- return true;
-}
-
-/* Handle a PowerPC specific section when reading an object file. This
- is called when elfcode.h finds a section with an unknown type. */
-
-static boolean
-ppc64_elf_section_from_shdr (abfd, hdr, name)
- bfd *abfd;
- Elf64_Internal_Shdr *hdr;
- char *name;
-{
- asection *newsect;
- flagword flags;
-
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
-
- newsect = hdr->bfd_section;
- flags = bfd_get_section_flags (abfd, newsect);
- if (hdr->sh_flags & SHF_EXCLUDE)
- flags |= SEC_EXCLUDE;
-
- if (hdr->sh_type == SHT_ORDERED)
- flags |= SEC_SORT_ENTRIES;
-
- bfd_set_section_flags (abfd, newsect, flags);
- return true;
-}
-\f
-/* The following functions are specific to the ELF linker, while
- functions above are used generally. Those named ppc64_elf_* are
- called by the main ELF linker code. They appear in this file more
- or less in the order in which they are called. eg.
- ppc64_elf_check_relocs is called early in the link process,
- ppc64_elf_finish_dynamic_sections is one of the last functions
- called.
-
- PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
- functions have both a function code symbol and a function descriptor
- symbol. A call to foo in a relocatable object file looks like:
+ PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
+ functions have both a function code symbol and a function descriptor
+ symbol. A call to foo in a relocatable object file looks like:
. .text
. x:
creating a shared library containing foo, we need to have both symbols
dynamic so that references to .foo are satisfied during the early
stages of linking. Otherwise the linker might decide to pull in a
- definition from some other object, eg. a static library. Thirdly, we'd
- like to use .foo as the stub symbol to avoid creating another symbol.
- We need to make sure that when .foo labels a stub in a shared library,
- it isn't exported. */
+ definition from some other object, eg. a static library. */
/* The linker needs to keep track of the number of relocs that it
decides to copy as dynamic relocs in check_relocs for each symbol.
selects between relative and absolute types. */
#define IS_ABSOLUTE_RELOC(RTYPE) \
- ((RTYPE) != R_PPC64_REL14 \
- && (RTYPE) != R_PPC64_REL14_BRNTAKEN \
- && (RTYPE) != R_PPC64_REL14_BRTAKEN \
- && (RTYPE) != R_PPC64_REL24 \
- && (RTYPE) != R_PPC64_REL32 \
- && (RTYPE) != R_PPC64_REL64)
+ ((RTYPE) != R_PPC64_REL32 \
+ && (RTYPE) != R_PPC64_REL64 \
+ && (RTYPE) != R_PPC64_ADDR30)
+
+/* Section name for stubs is the associated section name plus this
+ string. */
+#define STUB_SUFFIX ".stub"
+
+/* Linker stubs.
+ ppc_stub_long_branch:
+ Used when a 14 bit branch (or even a 24 bit branch) can't reach its
+ destination, but a 24 bit branch in a stub section will reach.
+ . b dest
+
+ ppc_stub_plt_branch:
+ Similar to the above, but a 24 bit branch in the stub section won't
+ reach its destination.
+ . addis %r12,%r2,xxx@ha
+ . ld %r11,xxx@l(%r12)
+ . mtctr %r11
+ . bctr
+
+ ppc_stub_plt_call:
+ Used to call a function in a shared library.
+ . addis %r12,%r2,xxx@ha
+ . std %r2,40(%r1)
+ . ld %r11,xxx+0@l(%r12)
+ . ld %r2,xxx+8@l(%r12)
+ . mtctr %r11
+ . ld %r11,xxx+16@l(%r12)
+ . bctr
+*/
+
+enum ppc_stub_type {
+ ppc_stub_none,
+ ppc_stub_long_branch,
+ ppc_stub_plt_branch,
+ ppc_stub_plt_call
+};
+
+struct ppc_stub_hash_entry {
+
+ /* Base hash table entry structure. */
+ struct bfd_hash_entry 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 ppc_stub_type stub_type;
-/* ppc64 ELF linker hash entry. */
+ /* The symbol table entry, if any, that this was derived from. */
+ struct ppc_link_hash_entry *h;
+
+ /* 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;
+};
+
+struct ppc_branch_hash_entry {
+
+ /* Base hash table entry structure. */
+ struct bfd_hash_entry root;
+
+ /* Offset within .branch_lt. */
+ unsigned int offset;
+
+ /* Generation marker. */
+ unsigned int iter;
+};
struct ppc_link_hash_entry
{
struct elf_link_hash_entry elf;
+ /* A pointer to the most recently used stub hash entry against this
+ symbol. */
+ struct ppc_stub_hash_entry *stub_cache;
+
/* Track dynamic relocs copied for this symbol. */
struct ppc_dyn_relocs *dyn_relocs;
+ /* Link between function code and descriptor symbols. */
+ struct elf_link_hash_entry *oh;
+
/* Flag function code and descriptor symbols. */
unsigned int is_func:1;
unsigned int is_func_descriptor:1;
+ unsigned int is_entry:1;
};
/* ppc64 ELF linker hash table. */
{
struct elf_link_hash_table elf;
+ /* The stub hash table. */
+ struct bfd_hash_table stub_hash_table;
+
+ /* Another hash table for plt_branch stubs. */
+ struct bfd_hash_table branch_hash_table;
+
+ /* Linker stub bfd. */
+ bfd *stub_bfd;
+
+ /* Linker call-backs. */
+ asection * (*add_stub_section) PARAMS ((const char *, asection *));
+ void (*layout_sections_again) PARAMS ((void));
+
+ /* Array to keep track of which stub sections have been created, and
+ information on stub grouping. */
+ struct map_stub {
+ /* This is the section to which stubs in the group will be attached. */
+ asection *link_sec;
+ /* The stub section. */
+ asection *stub_sec;
+ } *stub_group;
+
+ /* Assorted information used by ppc64_elf_size_stubs. */
+ int top_index;
+ asection **input_list;
+
/* Short-cuts to get to dynamic linker sections. */
asection *sgot;
asection *srelgot;
asection *srelplt;
asection *sdynbss;
asection *srelbss;
- asection *sstub;
asection *sglink;
+ asection *sfpr;
+ asection *sbrlt;
+ asection *srelbrlt;
/* Set on error. */
- int plt_overflow;
+ unsigned int stub_error;
+
+ /* Flag set when small branches are detected. Used to
+ select suitable defaults for the stub group size. */
+ unsigned int has_14bit_branch;
+
+ /* Set if we detect a reference undefined weak symbol. */
+ unsigned int have_undefweak;
+
+ /* Incremented every time we size stubs. */
+ unsigned int stub_iteration;
/* Small local sym to section mapping cache. */
struct sym_sec_cache sym_sec;
};
+static struct bfd_hash_entry *stub_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static struct bfd_hash_entry *branch_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static struct bfd_hash_entry *link_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
+ PARAMS ((bfd *));
+static void ppc64_elf_link_hash_table_free
+ PARAMS ((struct bfd_link_hash_table *));
+static char *ppc_stub_name
+ PARAMS ((const asection *, const asection *,
+ const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
+static struct ppc_stub_hash_entry *ppc_get_stub_entry
+ PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
+ const Elf_Internal_Rela *, struct ppc_link_hash_table *));
+static struct ppc_stub_hash_entry *ppc_add_stub
+ PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
+static boolean create_linkage_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean create_got_section
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean ppc64_elf_create_dynamic_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
+static void ppc64_elf_copy_indirect_symbol
+ PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
+ struct elf_link_hash_entry *));
+static boolean ppc64_elf_check_relocs
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
+static asection * ppc64_elf_gc_mark_hook
+ PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *));
+static boolean ppc64_elf_gc_sweep_hook
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
+static boolean func_desc_adjust
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+static boolean ppc64_elf_func_desc_adjust
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean ppc64_elf_adjust_dynamic_symbol
+ PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
+static void ppc64_elf_hide_symbol
+ PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
+static boolean edit_opd
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean allocate_dynrelocs
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+static boolean readonly_dynrelocs
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+static enum elf_reloc_type_class ppc64_elf_reloc_type_class
+ PARAMS ((const Elf_Internal_Rela *));
+static boolean ppc64_elf_size_dynamic_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
+static INLINE enum ppc_stub_type ppc_type_of_stub
+ PARAMS ((asection *, const Elf_Internal_Rela *,
+ struct ppc_link_hash_entry **, bfd_vma));
+static bfd_byte *build_plt_stub
+ PARAMS ((bfd *, bfd_byte *, int, int));
+static boolean ppc_build_one_stub
+ PARAMS ((struct bfd_hash_entry *, PTR));
+static boolean ppc_size_one_stub
+ PARAMS ((struct bfd_hash_entry *, PTR));
+static void group_sections
+ PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean));
+static boolean ppc64_elf_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
+ asection **));
+static boolean ppc64_elf_finish_dynamic_symbol
+ PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
+ Elf_Internal_Sym *));
+static boolean ppc64_elf_finish_dynamic_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
+
/* Get the ppc64 ELF linker hash table from a link_info structure. */
#define ppc_hash_table(p) \
((struct ppc_link_hash_table *) ((p)->hash))
+#define ppc_stub_hash_lookup(table, string, create, copy) \
+ ((struct ppc_stub_hash_entry *) \
+ bfd_hash_lookup ((table), (string), (create), (copy)))
+
+#define ppc_branch_hash_lookup(table, string, create, copy) \
+ ((struct ppc_branch_hash_entry *) \
+ bfd_hash_lookup ((table), (string), (create), (copy)))
+
+/* Create an entry in the stub hash table. */
+
+static struct bfd_hash_entry *
+stub_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = bfd_hash_allocate (table, sizeof (struct ppc_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 ppc_stub_hash_entry *eh;
+
+ /* Initialize the local fields. */
+ eh = (struct ppc_stub_hash_entry *) entry;
+ eh->stub_sec = NULL;
+ eh->stub_offset = 0;
+ eh->target_value = 0;
+ eh->target_section = NULL;
+ eh->stub_type = ppc_stub_none;
+ eh->h = NULL;
+ eh->id_sec = NULL;
+ }
+
+ return entry;
+}
+
+/* Create an entry in the branch hash table. */
+
+static struct bfd_hash_entry *
+branch_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_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 ppc_branch_hash_entry *eh;
+
+ /* Initialize the local fields. */
+ eh = (struct ppc_branch_hash_entry *) entry;
+ eh->offset = 0;
+ eh->iter = 0;
+ }
+
+ return entry;
+}
+
/* Create an entry in a ppc64 ELF linker hash table. */
static struct bfd_hash_entry *
{
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
+ eh->stub_cache = NULL;
eh->dyn_relocs = NULL;
+ eh->oh = NULL;
eh->is_func = 0;
eh->is_func_descriptor = 0;
+ eh->is_entry = 0;
}
return entry;
struct ppc_link_hash_table *htab;
bfd_size_type amt = sizeof (struct ppc_link_hash_table);
- htab = (struct ppc_link_hash_table *) bfd_alloc (abfd, amt);
+ htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
if (htab == NULL)
return NULL;
if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
{
- bfd_release (abfd, htab);
+ free (htab);
return NULL;
}
+ /* Init the stub hash table too. */
+ if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
+ return NULL;
+
+ /* And the branch hash table. */
+ if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
+ return NULL;
+
+ htab->stub_bfd = NULL;
+ htab->add_stub_section = NULL;
+ htab->layout_sections_again = NULL;
+ htab->stub_group = NULL;
htab->sgot = NULL;
htab->srelgot = NULL;
htab->splt = NULL;
htab->srelplt = NULL;
htab->sdynbss = NULL;
htab->srelbss = NULL;
- htab->sstub = NULL;
htab->sglink = NULL;
- htab->plt_overflow = 0;
+ htab->sfpr = NULL;
+ htab->sbrlt = NULL;
+ htab->srelbrlt = NULL;
+ htab->stub_error = 0;
+ htab->has_14bit_branch = 0;
+ htab->have_undefweak = 0;
+ htab->stub_iteration = 0;
htab->sym_sec.abfd = NULL;
return &htab->elf.root;
}
+/* Free the derived linker hash table. */
+
+static void
+ppc64_elf_link_hash_table_free (hash)
+ struct bfd_link_hash_table *hash;
+{
+ struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
+
+ bfd_hash_table_free (&ret->stub_hash_table);
+ bfd_hash_table_free (&ret->branch_hash_table);
+ _bfd_generic_link_hash_table_free (hash);
+}
+
+/* Build a name for an entry in the stub hash table. */
+
+static char *
+ppc_stub_name (input_section, sym_sec, h, rel)
+ const asection *input_section;
+ const asection *sym_sec;
+ const struct ppc_link_hash_entry *h;
+ const Elf_Internal_Rela *rel;
+{
+ char *stub_name;
+ bfd_size_type len;
+
+ /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
+ offsets from a sym as a branch target? In fact, we could
+ probably assume the addend is always zero. */
+ BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
+
+ if (h)
+ {
+ len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
+ stub_name = bfd_malloc (len);
+ if (stub_name != NULL)
+ {
+ sprintf (stub_name, "%08x_%s+%x",
+ input_section->id & 0xffffffff,
+ h->elf.root.root.string,
+ (int) rel->r_addend & 0xffffffff);
+ }
+ }
+ else
+ {
+ len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
+ stub_name = bfd_malloc (len);
+ if (stub_name != NULL)
+ {
+ sprintf (stub_name, "%08x_%x:%x+%x",
+ input_section->id & 0xffffffff,
+ sym_sec->id & 0xffffffff,
+ (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
+ (int) rel->r_addend & 0xffffffff);
+ }
+ }
+ return stub_name;
+}
+
+/* Look up an entry in the stub hash. Stub entries are cached because
+ creating the stub name takes a bit of time. */
+
+static struct ppc_stub_hash_entry *
+ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
+ const asection *input_section;
+ const asection *sym_sec;
+ struct elf_link_hash_entry *hash;
+ const Elf_Internal_Rela *rel;
+ struct ppc_link_hash_table *htab;
+{
+ struct ppc_stub_hash_entry *stub_entry;
+ struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
+ 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 section in 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. */
+ id_sec = htab->stub_group[input_section->id].link_sec;
+
+ if (h != NULL && h->stub_cache != NULL
+ && h->stub_cache->h == h
+ && h->stub_cache->id_sec == id_sec)
+ {
+ stub_entry = h->stub_cache;
+ }
+ else
+ {
+ char *stub_name;
+
+ stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
+ if (stub_name == NULL)
+ return NULL;
+
+ stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
+ stub_name, false, false);
+ if (h != NULL)
+ h->stub_cache = stub_entry;
+
+ free (stub_name);
+ }
+
+ return stub_entry;
+}
+
+/* Add a new stub entry to the stub hash. Not all fields of the new
+ stub entry are initialised. */
+
+static struct ppc_stub_hash_entry *
+ppc_add_stub (stub_name, section, htab)
+ const char *stub_name;
+ asection *section;
+ struct ppc_link_hash_table *htab;
+{
+ asection *link_sec;
+ asection *stub_sec;
+ struct ppc_stub_hash_entry *stub_entry;
+
+ link_sec = htab->stub_group[section->id].link_sec;
+ stub_sec = htab->stub_group[section->id].stub_sec;
+ if (stub_sec == NULL)
+ {
+ stub_sec = htab->stub_group[link_sec->id].stub_sec;
+ 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);
+ if (stub_sec == NULL)
+ return NULL;
+ htab->stub_group[link_sec->id].stub_sec = stub_sec;
+ }
+ htab->stub_group[section->id].stub_sec = stub_sec;
+ }
+
+ /* Enter this entry into the linker stub hash table. */
+ stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
+ true, false);
+ if (stub_entry == NULL)
+ {
+ (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
+ bfd_archive_filename (section->owner),
+ stub_name);
+ return NULL;
+ }
+
+ stub_entry->stub_sec = stub_sec;
+ stub_entry->stub_offset = 0;
+ stub_entry->id_sec = link_sec;
+ return stub_entry;
+}
+
+/* Create sections for linker generated code. */
+
+static boolean
+create_linkage_sections (dynobj, info)
+ bfd *dynobj;
+ struct bfd_link_info *info;
+{
+ struct ppc_link_hash_table *htab;
+ flagword flags;
+
+ htab = ppc_hash_table (info);
+
+ /* Create .sfpr for code to save and restore fp regs. */
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
+ if (htab->sfpr == NULL
+ || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
+ || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
+ return false;
+
+ /* Create .glink for lazy dynamic linking support. */
+ htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
+ if (htab->sglink == NULL
+ || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
+ || ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
+ return false;
+
+ /* Create .branch_lt for plt_branch stubs. */
+ flags = (SEC_ALLOC | SEC_LOAD
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
+ if (htab->sbrlt == NULL
+ || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
+ || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
+ return false;
+
+ if (info->shared)
+ {
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
+ if (!htab->srelbrlt
+ || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
+ || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
+ return false;
+ }
+ return true;
+}
+
/* Create .got and .rela.got sections in DYNOBJ, and set up
shortcuts to them in our hash table. */
return true;
}
-/* Create the .stub and .glink sections as well as the ordinary
- dynamic sections. */
+/* Create the dynamic sections, and set up shortcuts. */
static boolean
ppc64_elf_create_dynamic_sections (dynobj, info)
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
- flagword flags;
htab = ppc_hash_table (info);
if (!htab->sgot && !create_got_section (dynobj, info))
|| (!info->shared && !htab->srelbss))
abort ();
- /* Create .stub and .glink for global linkage functions. */
- flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
- | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- htab->sstub = bfd_make_section (dynobj, ".stub");
- if (htab->sstub == NULL
- || ! bfd_set_section_flags (dynobj, htab->sstub, flags)
- || ! bfd_set_section_alignment (dynobj, htab->sstub, 2))
- return false;
- htab->sglink = bfd_make_section (dynobj, ".glink");
- if (htab->sglink == NULL
- || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
- || ! bfd_set_section_alignment (dynobj, htab->sglink, 3))
- return false;
-
return true;
}
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
-ppc64_elf_copy_indirect_symbol (dir, ind)
+ppc64_elf_copy_indirect_symbol (bed, dir, ind)
+ struct elf_backend_data *bed;
struct elf_link_hash_entry *dir, *ind;
{
struct ppc_link_hash_entry *edir, *eind;
edir->is_func |= eind->is_func;
edir->is_func_descriptor |= eind->is_func_descriptor;
+ edir->is_entry |= eind->is_entry;
+
+ _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
+}
- _bfd_elf_link_hash_copy_indirect (dir, ind);
+/* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
+ symbols undefined on the command-line. */
+
+boolean
+ppc64_elf_mark_entry_syms (info)
+ struct bfd_link_info *info;
+{
+ struct ppc_link_hash_table *htab;
+ struct bfd_sym_chain *sym;
+
+ htab = ppc_hash_table (info);
+ for (sym = info->gc_sym_list; sym; sym = sym->next)
+ {
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (&htab->elf, sym->name, false, false, false);
+ if (h != NULL)
+ ((struct ppc_link_hash_entry *) h)->is_entry = 1;
+ }
+ return true;
}
/* Look through the relocs for a section during the first phase, and
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
asection *sreloc;
- boolean is_opd;
+ asection **opd_sym_map;
if (info->relocateable)
return true;
sym_hashes = elf_sym_hashes (abfd);
sym_hashes_end = (sym_hashes
- + symtab_hdr->sh_size / sizeof (Elf64_External_Sym));
- if (!elf_bad_symtab (abfd))
- sym_hashes_end -= symtab_hdr->sh_info;
+ + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
+ - symtab_hdr->sh_info);
sreloc = NULL;
- is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0;
+ opd_sym_map = NULL;
+ if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
+ {
+ /* Garbage collection needs some extra help with .opd sections.
+ We don't want to necessarily keep everything referenced by
+ relocs in .opd, as that would keep all functions. Instead,
+ if we reference an .opd symbol (a function descriptor), we
+ want to keep the function code symbol's section. This is
+ easy for global symbols, but for local syms we need to keep
+ information about the associated function section. Later, if
+ edit_opd deletes entries, we'll use this array to adjust
+ local syms in .opd. */
+ union opd_info {
+ asection *func_section;
+ long entry_adjust;
+ };
+ bfd_size_type amt;
+
+ amt = sec->_raw_size * sizeof (union opd_info) / 24;
+ opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
+ if (opd_sym_map == NULL)
+ return false;
+ elf_section_data (sec)->tdata = opd_sym_map;
+ }
+
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ if (htab->sfpr == NULL
+ && !create_linkage_sections (htab->elf.dynobj, info))
+ return false;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
case R_PPC64_GOT16_LO_DS:
/* This symbol requires a global offset table entry. */
- if (htab->sgot == NULL)
- {
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
- if (!create_got_section (htab->elf.dynobj, info))
- return false;
- }
+ if (htab->sgot == NULL
+ && !create_got_section (htab->elf.dynobj, info))
+ return false;
if (h != NULL)
{
case R_PPC64_PLT32:
case R_PPC64_PLT64:
/* This symbol requires a procedure linkage table entry. We
- actually build the entry in adjust_dynamic_symbol,
- because this might be a case of linking PIC code without
- linking in any dynamic objects, in which case we don't
- need to generate a procedure linkage table after all. */
+ actually build the entry in adjust_dynamic_symbol,
+ because this might be a case of linking PIC code without
+ linking in any dynamic objects, in which case we don't
+ need to generate a procedure linkage table after all. */
if (h == NULL)
{
/* It does not make sense to have a procedure linkage
- table entry for a local symbol. */
+ table entry for a local symbol. */
bfd_set_error (bfd_error_bad_value);
return false;
}
return false;
break;
+ case R_PPC64_REL14:
+ case R_PPC64_REL14_BRTAKEN:
+ case R_PPC64_REL14_BRNTAKEN:
+ htab->has_14bit_branch = 1;
+ /* Fall through. */
+
case R_PPC64_REL24:
if (h != NULL
&& h->root.root.string[0] == '.'
break;
case R_PPC64_ADDR64:
- if (is_opd
+ if (opd_sym_map != NULL
&& h != NULL
&& h->root.root.string[0] == '.'
&& h->root.root.string[1] != 0)
false, false, false);
if (fdh != NULL)
{
- /* Ensure the function descriptor symbol string is
- part of the code symbol string. We aren't
- changing the name here, just allowing some tricks
- in ppc64_elf_hide_symbol. */
- fdh->root.root.string = h->root.root.string + 1;
((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
+ ((struct ppc_link_hash_entry *) fdh)->oh = h;
((struct ppc_link_hash_entry *) h)->is_func = 1;
+ ((struct ppc_link_hash_entry *) h)->oh = fdh;
}
}
+ if (opd_sym_map != NULL
+ && h == NULL
+ && rel + 1 < rel_end
+ && ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
+ == R_PPC64_TOC))
+ {
+ asection *s;
+
+ s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
+ r_symndx);
+ if (s == NULL)
+ return false;
+ else if (s != sec)
+ opd_sym_map[rel->r_offset / 24] = s;
+ }
/* Fall through. */
case R_PPC64_REL64:
case R_PPC64_REL32:
- case R_PPC64_REL14:
- case R_PPC64_REL14_BRTAKEN:
- case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
case R_PPC64_TOC:
-#if 0
- /* Don't propagate .opd relocs. */
- if (is_opd)
+ /* Don't propagate .opd relocs. */
+ if (NO_OPD_RELOCS && opd_sym_map != NULL)
break;
-#endif
/* If we are creating a shared library, and this is a reloc
against a global symbol, or a non PC relative reloc
bfd_set_error (bfd_error_bad_value);
}
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
-
dynobj = htab->elf.dynobj;
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
break;
default:
+ break;
}
}
relocation. */
static asection *
-ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym)
- bfd *abfd;
+ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
+ asection *sec;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
Elf_Internal_Rela *rel;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
{
+ asection *rsec = NULL;
+
if (h != NULL)
{
enum elf_ppc_reloc_type r_type;
+ struct ppc_link_hash_entry *fdh;
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
- return h->root.u.def.section;
+ fdh = (struct ppc_link_hash_entry *) h;
+
+ /* Function descriptor syms cause the associated
+ function code sym section to be marked. */
+ if (fdh->is_func_descriptor)
+ rsec = fdh->oh->root.u.def.section;
+
+ /* Function entry syms return NULL if they are in .opd
+ and are not ._start (or others undefined on the ld
+ command line). Thus we avoid marking all function
+ sections, as all functions are referenced in .opd. */
+ else if ((fdh->oh != NULL
+ && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
+ || elf_section_data (sec)->tdata == NULL)
+ rsec = h->root.u.def.section;
+ break;
case bfd_link_hash_common:
- return h->root.u.c.p->section;
+ rsec = h->root.u.c.p->section;
+ break;
default:
break;
}
else
{
- return bfd_section_from_elf_index (abfd, sym->st_shndx);
+ asection **opd_sym_section;
+
+ rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+ opd_sym_section = (asection **) elf_section_data (rsec)->tdata;
+ if (opd_sym_section != NULL)
+ rsec = opd_sym_section[sym->st_value / 24];
+ else if (elf_section_data (sec)->tdata != NULL)
+ rsec = NULL;
}
- return NULL;
+ return rsec;
}
/* Update the .got, .plt. and dynamic reloc reference counts for the
}
break;
+ case R_PPC64_REL14:
+ case R_PPC64_REL14_BRNTAKEN:
+ case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL24:
if (r_symndx >= symtab_hdr->sh_info)
{
}
break;
- case R_PPC64_REL14:
- case R_PPC64_REL14_BRNTAKEN:
- case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL32:
case R_PPC64_REL64:
if (r_symndx >= symtab_hdr->sh_info)
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
- if (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
+ if (h->root.type == bfd_link_hash_indirect)
return true;
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
info = (struct bfd_link_info *) inf;
htab = ppc_hash_table (info);
if (!((struct ppc_link_hash_entry *) h)->is_func)
return true;
+ if (h->root.type == bfd_link_hash_undefweak
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
+ htab->have_undefweak = true;
+
if (h->plt.refcount > 0
&& h->root.root.string[0] == '.'
&& h->root.root.string[1] != '\0')
{
- struct elf_link_hash_entry *fdh;
+ struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
boolean force_local;
/* Find the corresponding function descriptor symbol. Create it
as undefined if necessary. */
- fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
- false, false, true);
+ if (fdh == NULL)
+ fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
+ false, false, true);
- if (fdh == NULL && info->shared)
+ if (fdh == NULL
+ && info->shared
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
{
bfd *abfd;
asymbol *newsym;
- /* Create it as undefined. */
- if (h->root.type == bfd_link_hash_undefined
- || h->root.type == bfd_link_hash_undefweak)
- abfd = h->root.u.undef.abfd;
- else if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- abfd = h->root.u.def.section->owner;
- else
- abort ();
+ abfd = h->root.u.undef.abfd;
newsym = bfd_make_empty_symbol (abfd);
newsym->name = h->root.root.string + 1;
newsym->section = bfd_und_section_ptr;
{
return false;
}
+ fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
}
if (fdh != NULL
if (fdh->dynindx == -1)
if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
return false;
- fdh->plt.refcount = h->plt.refcount;
fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
| ELF_LINK_HASH_REF_DYNAMIC
| ELF_LINK_HASH_REF_REGULAR_NONWEAK
| ELF_LINK_NON_GOT_REF));
- fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
+ {
+ fdh->plt.refcount = h->plt.refcount;
+ fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ }
((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
- fdh->root.root.string = h->root.root.string + 1;
+ ((struct ppc_link_hash_entry *) fdh)->oh = h;
+ ((struct ppc_link_hash_entry *) h)->oh = fdh;
}
/* Now that the info is on the function descriptor, clear the
This prevents a shared library from exporting syms that have
been imported from another library. Function code syms that
are really in the library we must leave global to prevent the
- linker dragging a definition in from a static library. */
- force_local = (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0;
+ linker dragging in a definition from a static library. */
+ force_local = (info->shared
+ && ((h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0
+ || fdh == NULL
+ || (fdh->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0
+ || (fdh->elf_link_hash_flags
+ & ELF_LINK_FORCED_LOCAL) != 0));
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
}
return true;
}
+#define MIN_SAVE_FPR 14
+#define MAX_SAVE_FPR 31
+
/* Called near the start of bfd_elf_size_dynamic_sections. We use
- this hook to transfer dynamic linking information gathered so far
- on function code symbol entries, to their corresponding function
- descriptor symbol entries. */
+ this hook to a) provide some gcc support functions, and b) transfer
+ dynamic linking information gathered so far on function code symbol
+ entries, to their corresponding function descriptor symbol entries. */
static boolean
ppc64_elf_func_desc_adjust (obfd, info)
bfd *obfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
+ unsigned int lowest_savef = MAX_SAVE_FPR + 2;
+ unsigned int lowest_restf = MAX_SAVE_FPR + 2;
+ unsigned int i;
+ struct elf_link_hash_entry *h;
+ bfd_byte *p;
+ char sym[10];
htab = ppc_hash_table (info);
+
+ if (htab->sfpr == NULL)
+ /* We don't have any relocs. */
+ return true;
+
+ /* First provide any missing ._savef* and ._restf* functions. */
+ memcpy (sym, "._savef14", 10);
+ for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
+ {
+ sym[7] = i / 10 + '0';
+ sym[8] = i % 10 + '0';
+ h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefined)
+ {
+ if (lowest_savef > i)
+ lowest_savef = i;
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = htab->sfpr;
+ h->root.u.def.value = (i - lowest_savef) * 4;
+ h->type = STT_FUNC;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
+ }
+ }
+
+ memcpy (sym, "._restf14", 10);
+ for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
+ {
+ sym[7] = i / 10 + '0';
+ sym[8] = i % 10 + '0';
+ h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefined)
+ {
+ if (lowest_restf > i)
+ lowest_restf = i;
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = htab->sfpr;
+ h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
+ + (i - lowest_restf) * 4);
+ h->type = STT_FUNC;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
+ }
+ }
+
elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
+
+ htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
+ + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
+
+ if (htab->sfpr->_raw_size == 0)
+ {
+ if (!htab->have_undefweak)
+ {
+ _bfd_strip_section_from_output (info, htab->sfpr);
+ return true;
+ }
+
+ htab->sfpr->_raw_size = 4;
+ }
+
+ p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
+ if (p == NULL)
+ return false;
+ htab->sfpr->contents = p;
+
+ for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
+ {
+ unsigned int fpr = i << 21;
+ unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
+ bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
+ p += 4;
+ }
+ if (lowest_savef <= MAX_SAVE_FPR)
+ {
+ bfd_put_32 (htab->elf.dynobj, BLR, p);
+ p += 4;
+ }
+
+ for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
+ {
+ unsigned int fpr = i << 21;
+ unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
+ bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
+ p += 4;
+ }
+ if (lowest_restf <= MAX_SAVE_FPR
+ || htab->sfpr->_raw_size == 4)
+ {
+ bfd_put_32 (htab->elf.dynobj, BLR, p);
+ }
+
return true;
}
if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
{
- const char *name;
- struct elf_link_hash_entry *fh;
- struct ppc_link_hash_table *htab;
+ struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
- name = h->root.root.string - 1;
- htab = ppc_hash_table (info);
- fh = elf_link_hash_lookup (&htab->elf, name, false, false, false);
+ if (fh == NULL)
+ {
+ const char *p, *q;
+ struct ppc_link_hash_table *htab;
+ char save;
+
+ /* We aren't supposed to use alloca in BFD because on
+ systems which do not have alloca the version in libiberty
+ calls xmalloc, which might cause the program to crash
+ when it runs out of memory. This function doesn't have a
+ return status, so there's no way to gracefully return an
+ error. So cheat. We know that string[-1] can be safely
+ dereferenced; It's either a string in an ELF string
+ table, or allocated in an objalloc structure. */
+
+ p = h->root.root.string - 1;
+ save = *p;
+ *(char *) p = '.';
+ htab = ppc_hash_table (info);
+ fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
+ *(char *) p = save;
+
+ /* Unfortunately, if it so happens that the string we were
+ looking for was allocated immediately before this string,
+ then we overwrote the string terminator. That's the only
+ reason the lookup should fail. */
+ if (fh == NULL)
+ {
+ q = h->root.root.string + strlen (h->root.root.string);
+ while (q >= h->root.root.string && *q == *p)
+ --q, --p;
+ if (q < h->root.root.string && *p == '.')
+ fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
+ }
+ if (fh != NULL)
+ {
+ ((struct ppc_link_hash_entry *) h)->oh = fh;
+ ((struct ppc_link_hash_entry *) fh)->oh = h;
+ }
+ }
if (fh != NULL)
_bfd_elf_link_hash_hide_symbol (info, fh, force_local);
}
}
+static boolean
+edit_opd (obfd, info)
+ bfd *obfd;
+ struct bfd_link_info *info;
+{
+ bfd *ibfd;
+ unsigned int bfd_indx;
+
+ for (bfd_indx = 0, ibfd = info->input_bfds;
+ ibfd != NULL;
+ ibfd = ibfd->link_next, bfd_indx++)
+ {
+ asection *sec;
+ Elf_Internal_Rela *relstart, *rel, *relend;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *local_syms;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_vma offset;
+ long *adjust;
+ boolean need_edit;
+
+ sec = bfd_get_section_by_name (ibfd, ".opd");
+ if (sec == NULL)
+ continue;
+
+ adjust = (long *) elf_section_data (sec)->tdata;
+ BFD_ASSERT (adjust != NULL);
+ memset (adjust, 0, (size_t) sec->_raw_size * sizeof (long) / 24);
+
+ if (sec->output_section == bfd_abs_section_ptr)
+ continue;
+
+ /* Look through the section relocs. */
+ if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
+ continue;
+
+ local_syms = NULL;
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (ibfd);
+
+ /* Read the relocations. */
+ relstart = _bfd_elf64_link_read_relocs (obfd, sec, (PTR) NULL,
+ (Elf_Internal_Rela *) NULL,
+ info->keep_memory);
+ if (relstart == NULL)
+ return false;
+
+ /* First run through the relocs to check they are sane, and to
+ determine whether we need to edit this opd section. */
+ need_edit = false;
+ offset = 0;
+ relend = relstart + sec->reloc_count;
+ for (rel = relstart; rel < relend; rel++)
+ {
+ enum elf_ppc_reloc_type r_type;
+ unsigned long r_symndx;
+ asection *sym_sec;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+
+ /* .opd contains a regular array of 24 byte entries. We're
+ only interested in the reloc pointing to a function entry
+ point. */
+ r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
+ if (r_type == R_PPC64_TOC)
+ continue;
+
+ if (r_type != R_PPC64_ADDR64)
+ {
+ (*_bfd_error_handler)
+ (_("%s: unexpected reloc type %u in .opd section"),
+ bfd_archive_filename (ibfd), r_type);
+ need_edit = false;
+ break;
+ }
+
+ if (rel + 1 >= relend)
+ continue;
+ r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
+ if (r_type != R_PPC64_TOC)
+ continue;
+
+ if (rel->r_offset != offset)
+ {
+ /* If someone messes with .opd alignment then after a
+ "ld -r" we might have padding in the middle of .opd.
+ Also, there's nothing to prevent someone putting
+ something silly in .opd with the assembler. No .opd
+ optimization for them! */
+ (*_bfd_error_handler)
+ (_("%s: .opd is not a regular array of opd entries"),
+ bfd_archive_filename (ibfd));
+ need_edit = false;
+ break;
+ }
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ sym_sec = NULL;
+ h = NULL;
+ sym = NULL;
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ sym_sec = h->root.u.def.section;
+ }
+ else
+ {
+ if (local_syms == NULL)
+ {
+ local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (local_syms == NULL)
+ local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (local_syms == NULL)
+ goto error_free_rel;
+ }
+ sym = local_syms + r_symndx;
+ if ((sym->st_shndx != SHN_UNDEF
+ && sym->st_shndx < SHN_LORESERVE)
+ || sym->st_shndx > SHN_HIRESERVE)
+ sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
+ }
+
+ if (sym_sec == NULL || sym_sec->owner == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: undefined sym `%s' in .opd section"),
+ bfd_archive_filename (ibfd),
+ h != NULL ? h->root.root.string : "<local symbol>");
+ need_edit = false;
+ break;
+ }
+
+ if (sym_sec->output_section == bfd_abs_section_ptr)
+ {
+ /* OK, we've found a function that's excluded from the
+ link. */
+ need_edit = true;
+ }
+
+ offset += 24;
+ }
+
+ if (need_edit)
+ {
+ Elf_Internal_Rela *write_rel;
+ bfd_byte *rptr, *wptr;
+ boolean skip;
+
+ /* This seems a waste of time as input .opd sections are all
+ zeros as generated by gcc, but I suppose there's no reason
+ this will always be so. We might start putting something in
+ the third word of .opd entries. */
+ if ((sec->flags & SEC_IN_MEMORY) == 0)
+ {
+ bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
+ if (loc == NULL
+ || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
+ sec->_raw_size))
+ {
+ if (local_syms != NULL
+ && symtab_hdr->contents != (unsigned char *) local_syms)
+ free (local_syms);
+ error_free_rel:
+ if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ return false;
+ }
+ sec->contents = loc;
+ sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
+ }
+
+ elf_section_data (sec)->relocs = relstart;
+
+ wptr = sec->contents;
+ rptr = sec->contents;
+ write_rel = relstart;
+ skip = false;
+ offset = 0;
+ for (rel = relstart; rel < relend; rel++)
+ {
+ if (rel->r_offset == offset)
+ {
+ unsigned long r_symndx;
+ asection *sym_sec;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ sym_sec = NULL;
+ h = NULL;
+ sym = NULL;
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ sym_sec = h->root.u.def.section;
+ }
+ else
+ {
+ sym = local_syms + r_symndx;
+ if ((sym->st_shndx != SHN_UNDEF
+ && sym->st_shndx < SHN_LORESERVE)
+ || sym->st_shndx > SHN_HIRESERVE)
+ sym_sec = bfd_section_from_elf_index (ibfd,
+ sym->st_shndx);
+ }
+
+ skip = sym_sec->output_section == bfd_abs_section_ptr;
+ if (skip)
+ {
+ if (h != NULL)
+ {
+ /* Arrange for the function descriptor sym
+ to be dropped. */
+ struct elf_link_hash_entry *fdh;
+ struct ppc_link_hash_entry *fh;
+
+ fh = (struct ppc_link_hash_entry *) h;
+ BFD_ASSERT (fh->is_func);
+ fdh = fh->oh;
+ fdh->root.u.def.value = 0;
+ fdh->root.u.def.section = sym_sec;
+ }
+ }
+ else
+ {
+ /* We'll be keeping this opd entry. */
+
+ if (h != NULL)
+ {
+ /* Redefine the function descriptor symbol
+ to this location in the opd section.
+ We've checked above that opd relocs are
+ ordered. */
+ struct elf_link_hash_entry *fdh;
+ struct ppc_link_hash_entry *fh;
+
+ fh = (struct ppc_link_hash_entry *) h;
+ BFD_ASSERT (fh->is_func);
+ fdh = fh->oh;
+ fdh->root.u.def.value = wptr - sec->contents;
+ }
+ else
+ {
+ /* Local syms are a bit tricky. We could
+ tweak them as they can be cached, but
+ we'd need to look through the local syms
+ for the function descriptor sym which we
+ don't have at the moment. So keep an
+ array of adjustments. */
+ adjust[(rel->r_offset + wptr - rptr) / 24]
+ = wptr - rptr;
+ }
+
+ if (wptr != rptr)
+ memcpy (wptr, rptr, 24);
+ wptr += 24;
+ }
+ rptr += 24;
+ offset += 24;
+ }
+
+ /* We need to adjust any reloc offsets to point to the
+ new opd entries. While we're at it, we may as well
+ remove redundant relocs. */
+ if (!skip)
+ {
+ rel->r_offset += wptr - rptr;
+ if (write_rel != rel)
+ memcpy (write_rel, rel, sizeof (*rel));
+ ++write_rel;
+ }
+ }
+
+ sec->_cooked_size = wptr - sec->contents;
+ sec->reloc_count = write_rel - relstart;
+ }
+ else if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+
+ if (local_syms != NULL
+ && symtab_hdr->contents != (unsigned char *) local_syms)
+ {
+ if (!info->keep_memory)
+ free (local_syms);
+ else
+ symtab_hdr->contents = (unsigned char *) local_syms;
+ }
+ }
+
+ return true;
+}
+
/* This is the condition under which ppc64_elf_finish_dynamic_symbol
will be called from elflink.h. If elflink.h doesn't call our
finish_dynamic_symbol routine, we'll need to do something about
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
- if (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
+ if (h->root.type == bfd_link_hash_indirect)
return true;
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
info = (struct bfd_link_info *) inf;
htab = ppc_hash_table (info);
/* Make room for this entry. */
s->_raw_size += PLT_ENTRY_SIZE;
- /* Make room for the .stub and .glink code. */
- s = htab->sstub;
- s->_raw_size += PLT_CALL_STUB_SIZE;
-
+ /* Make room for the .glink code. */
s = htab->sglink;
if (s->_raw_size == 0)
s->_raw_size += GLINK_CALL_STUB_SIZE;
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
eh = (struct ppc_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
linker script /DISCARD/, so we'll be discarding
the relocs too. */
}
- else
+ else if (p->count != 0)
{
srel = elf_section_data (p->sec)->sreloc;
srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
+ if ((p->sec->output_section->flags & SEC_READONLY) != 0)
+ info->flags |= DF_TEXTREL;
}
}
}
}
}
+ if (!edit_opd (output_bfd, info))
+ return false;
+
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
relocs = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
- bfd_vma size;
-
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
- if (s == htab->splt
- || s == htab->sgot
- || s == htab->sstub
- || s == htab->sglink)
+ if (s == htab->sbrlt || s == htab->srelbrlt)
+ /* These haven't been allocated yet; don't strip. */
+ continue;
+ else if (s == htab->splt
+ || s == htab->sgot
+ || s == htab->sglink)
{
/* Strip this section if we don't need it; see the
comment below. */
continue;
}
+ /* .plt is in the bss section. We don't initialise it. */
+ if ((s->flags & SEC_LOAD) == 0)
+ continue;
+
/* Allocate memory for the section contents. We use bfd_zalloc
here in case unused entries are not reclaimed before the
section's contents are written out. This should not happen,
but this way if it does, we get a R_PPC64_NONE reloc instead
of garbage. */
- size = s->_raw_size;
- if (s == htab->sstub)
- {
- /* .stub may grow. Allocate enough for the maximum growth. */
- size += (size + 65536 + 65535) / 65536 * 4;
- }
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, size);
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
if (s->contents == NULL)
return false;
}
return false;
}
- if (htab->splt->_raw_size != 0)
+ if (htab->splt != NULL && htab->splt->_raw_size != 0)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
return false;
}
- if (relocs)
- {
- if (!add_dynamic_entry (DT_RELA, 0)
- || !add_dynamic_entry (DT_RELASZ, 0)
- || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
- return false;
+ if (NO_OPD_RELOCS)
+ {
+ if (!add_dynamic_entry (DT_PPC64_OPD, 0)
+ || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
+ return false;
+ }
+
+ if (relocs)
+ {
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
+ return false;
+
+ /* If any dynamic relocs apply to a read-only section,
+ then we need a DT_TEXTREL entry. */
+ if ((info->flags & DF_TEXTREL) == 0)
+ elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
+ (PTR) info);
+
+ if ((info->flags & DF_TEXTREL) != 0)
+ {
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return false;
+ }
+ }
+ }
+#undef add_dynamic_entry
+
+ return true;
+}
+
+/* Determine the type of stub needed, if any, for a call. */
+
+static INLINE enum ppc_stub_type
+ppc_type_of_stub (input_sec, rel, hash, destination)
+ asection *input_sec;
+ const Elf_Internal_Rela *rel;
+ struct ppc_link_hash_entry **hash;
+ bfd_vma destination;
+{
+ struct ppc_link_hash_entry *h = *hash;
+ bfd_vma location;
+ bfd_vma branch_offset;
+ bfd_vma max_branch_offset;
+ unsigned int r_type;
+
+ if (h != NULL)
+ {
+ if (h->oh != NULL
+ && h->oh->plt.offset != (bfd_vma) -1
+ && h->oh->dynindx != -1)
+ {
+ *hash = (struct ppc_link_hash_entry *) h->oh;
+ return ppc_stub_plt_call;
+ }
+
+ if (h->elf.root.type == bfd_link_hash_undefweak
+ || h->elf.root.type == bfd_link_hash_undefined)
+ return ppc_stub_none;
+ }
+
+ /* Determine where the call point is. */
+ location = (input_sec->output_offset
+ + input_sec->output_section->vma
+ + rel->r_offset);
+
+ branch_offset = destination - location;
+ r_type = ELF64_R_TYPE (rel->r_info);
+
+ /* Determine if a long branch stub is needed. */
+ max_branch_offset = 1 << 25;
+ if (r_type != (unsigned int) R_PPC64_REL24)
+ max_branch_offset = 1 << 15;
+
+ if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
+ /* We need a stub. Figure out whether a long_branch or plt_branch
+ is needed later. */
+ return ppc_stub_long_branch;
+
+ return ppc_stub_none;
+}
+
+/* Build a .plt call stub. */
+
+static bfd_byte *
+build_plt_stub (obfd, p, offset, glink)
+ bfd *obfd;
+ bfd_byte *p;
+ int offset;
+ int glink;
+{
+#define PPC_LO(v) ((v) & 0xffff)
+#define PPC_HI(v) (((v) >> 16) & 0xffff)
+#define PPC_HA(v) PPC_HI ((v) + 0x8000)
+
+ if (glink)
+ bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
+ bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
+ if (!glink)
+ bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
+ bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
+ if (PPC_HA (offset + 8) != PPC_HA (offset))
+ bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
+ offset += 8;
+ bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
+ if (PPC_HA (offset + 8) != PPC_HA (offset))
+ bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
+ offset += 8;
+ bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
+ bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
+ bfd_put_32 (obfd, BCTR, p), p += 4;
+ return p;
+}
+
+static boolean
+ppc_build_one_stub (gen_entry, in_arg)
+ struct bfd_hash_entry *gen_entry;
+ PTR in_arg;
+{
+ struct ppc_stub_hash_entry *stub_entry;
+ struct ppc_branch_hash_entry *br_entry;
+ struct bfd_link_info *info;
+ struct ppc_link_hash_table *htab;
+ asection *stub_sec;
+ bfd *stub_bfd;
+ bfd_byte *loc;
+ bfd_byte *p;
+ unsigned int indx;
+ bfd_vma off;
+ int size;
+
+ /* Massage our args to the form they really have. */
+ stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
+ info = (struct bfd_link_info *) in_arg;
+
+ htab = ppc_hash_table (info);
+ stub_sec = stub_entry->stub_sec;
+
+ /* Make a note of the offset within the stubs for this entry. */
+ stub_entry->stub_offset = stub_sec->_cooked_size;
+ loc = stub_sec->contents + stub_entry->stub_offset;
+
+ stub_bfd = stub_sec->owner;
+
+ switch (stub_entry->stub_type)
+ {
+ case ppc_stub_long_branch:
+ /* Branches are relative. This is where we are going to. */
+ off = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
+
+ /* And this is where we are coming from. */
+ off -= (stub_entry->stub_offset
+ + stub_sec->output_offset
+ + stub_sec->output_section->vma);
+
+ BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
+
+ bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
+ size = 4;
+ break;
+
+ case ppc_stub_plt_branch:
+ br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
+ stub_entry->root.string + 9,
+ false, false);
+ if (br_entry == NULL)
+ {
+ (*_bfd_error_handler) (_("can't find branch stub `%s'"),
+ stub_entry->root.string + 9);
+ htab->stub_error = true;
+ return false;
+ }
+
+ off = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
+
+ bfd_put_64 (htab->sbrlt->owner, off,
+ htab->sbrlt->contents + br_entry->offset);
+
+ if (info->shared)
+ {
+ /* Create a reloc for the branch lookup table entry. */
+ Elf_Internal_Rela rela;
+ Elf64_External_Rela *r;
+
+ rela.r_offset = (br_entry->offset
+ + htab->sbrlt->output_offset
+ + htab->sbrlt->output_section->vma);
+ rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
+ rela.r_addend = off;
+
+ r = (Elf64_External_Rela *) htab->srelbrlt->contents;
+ r += htab->srelbrlt->reloc_count++;
+ bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
+ }
+
+ off = (br_entry->offset
+ + htab->sbrlt->output_offset
+ + htab->sbrlt->output_section->vma
+ - elf_gp (htab->sbrlt->output_section->owner)
+ - TOC_BASE_OFF);
+
+ if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("linkage table error against `%s'"),
+ stub_entry->root.string);
+ bfd_set_error (bfd_error_bad_value);
+ htab->stub_error = true;
+ return false;
+ }
+
+ indx = off;
+ bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
+ bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
+ bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
+ bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
+ size = 16;
+ break;
+
+ case ppc_stub_plt_call:
+ /* Do the best we can for shared libraries built without
+ exporting ".foo" for each "foo". This can happen when symbol
+ versioning scripts strip all bar a subset of symbols. */
+ if (stub_entry->h->oh->root.type != bfd_link_hash_defined
+ && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
+ {
+ /* Point the symbol at the stub. There may be multiple stubs,
+ we don't really care; The main thing is to make this sym
+ defined somewhere. */
+ stub_entry->h->oh->root.type = bfd_link_hash_defined;
+ stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
+ stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
+ }
+
+ /* Now build the stub. */
+ off = stub_entry->h->elf.plt.offset;
+ if (off >= (bfd_vma) -2)
+ abort ();
+
+ off &= ~ (bfd_vma) 1;
+ off += (htab->splt->output_offset
+ + htab->splt->output_section->vma
+ - elf_gp (htab->splt->output_section->owner)
+ - TOC_BASE_OFF);
+
+ if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("linkage table error against `%s'"),
+ stub_entry->h->elf.root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ htab->stub_error = true;
+ return false;
+ }
+
+ p = build_plt_stub (stub_bfd, loc, (int) off, 0);
+ size = p - loc;
+ break;
+
+ default:
+ BFD_FAIL ();
+ return false;
+ }
+
+ stub_sec->_cooked_size += size;
+ return true;
+}
+
+/* As above, but don't actually build the stub. Just bump offset so
+ we know stub section sizes, and select plt_branch stubs where
+ long_branch stubs won't do. */
+
+static boolean
+ppc_size_one_stub (gen_entry, in_arg)
+ struct bfd_hash_entry *gen_entry;
+ PTR in_arg;
+{
+ struct ppc_stub_hash_entry *stub_entry;
+ struct ppc_link_hash_table *htab;
+ bfd_vma off;
+ int size;
+
+ /* Massage our args to the form they really have. */
+ stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
+ htab = (struct ppc_link_hash_table *) in_arg;
+
+ if (stub_entry->stub_type == ppc_stub_plt_call)
+ {
+ off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
+ off += (htab->splt->output_offset
+ + htab->splt->output_section->vma
+ - elf_gp (htab->splt->output_section->owner)
+ - TOC_BASE_OFF);
+
+ size = 28;
+ if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
+ size += 4;
+ }
+ else
+ {
+ /* ppc_stub_long_branch or ppc_stub_plt_branch. */
+ stub_entry->stub_type = ppc_stub_long_branch;
+ size = 4;
+
+ off = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
+ off -= (stub_entry->stub_sec->_raw_size
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma);
+
+ if (off + (1 << 25) >= (bfd_vma) (1 << 26))
+ {
+ struct ppc_branch_hash_entry *br_entry;
+
+ br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
+ stub_entry->root.string + 9,
+ true, false);
+ if (br_entry == NULL)
+ {
+ (*_bfd_error_handler) (_("can't build branch stub `%s'"),
+ stub_entry->root.string + 9);
+ htab->stub_error = true;
+ return false;
+ }
+
+ if (br_entry->iter != htab->stub_iteration)
+ {
+ br_entry->iter = htab->stub_iteration;
+ br_entry->offset = htab->sbrlt->_raw_size;
+ htab->sbrlt->_raw_size += 8;
+ }
+ stub_entry->stub_type = ppc_stub_plt_branch;
+ size = 16;
+ }
+ }
+
+ stub_entry->stub_sec->_raw_size += size;
+ return true;
+}
+
+/* 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
+ppc64_elf_setup_section_lists (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ bfd *input_bfd;
+ int top_id, top_index;
+ asection *section;
+ asection **input_list, **list;
+ bfd_size_type amt;
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+
+ if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
+ || htab->sbrlt == NULL)
+ return 0;
+
+ /* Find the top input section id. */
+ for (input_bfd = info->input_bfds, top_id = 0;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link_next)
+ {
+ for (section = input_bfd->sections;
+ section != NULL;
+ section = section->next)
+ {
+ if (top_id < section->id)
+ top_id = section->id;
+ }
+ }
+
+ amt = sizeof (struct map_stub) * (top_id + 1);
+ htab->stub_group = (struct map_stub *) 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
+ _bfd_strip_section_from_output 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 = (asection **) 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)
+ {
+ if ((section->flags & SEC_CODE) != 0)
+ 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
+ppc64_elf_next_input_section (info, isec)
+ struct bfd_link_info *info;
+ asection *isec;
+{
+ struct ppc_link_hash_table *htab = ppc_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 link_sec pointer for our list. */
+#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
+ /* This happens to make the list in reverse order,
+ which is what we want. */
+ PREV_SEC (isec) = *list;
+ *list = isec;
+ }
+ }
+}
+
+/* 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 beginning 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. */
+
+static void
+group_sections (htab, stub_group_size, stubs_always_before_branch)
+ struct ppc_link_hash_table *htab;
+ bfd_size_type stub_group_size;
+ boolean stubs_always_before_branch;
+{
+ asection **list = htab->input_list + htab->top_index;
+ do
+ {
+ asection *tail = *list;
+ if (tail == bfd_abs_section_ptr)
+ continue;
+ while (tail != NULL)
+ {
+ asection *curr;
+ asection *prev;
+ bfd_size_type total;
+
+ curr = tail;
+ if (tail->_cooked_size)
+ total = tail->_cooked_size;
+ else
+ total = tail->_raw_size;
+ while ((prev = PREV_SEC (curr)) != NULL
+ && ((total += curr->output_offset - prev->output_offset)
+ < stub_group_size))
+ curr = prev;
+
+ /* OK, the size from the start of CURR to the end is less
+ than stub_group_size and thus can be handled by one stub
+ section. (or the tail section is itself larger than
+ stub_group_size, in which case we may be toast.) We
+ should really be keeping track of the total size of stubs
+ added here, as stubs contribute to the final output
+ section size. That's a little tricky, and this way will
+ only break if stubs added make the total size more than
+ 2^25, ie. for the default stub_group_size, if stubs total
+ more than 2834432 bytes, or over 100000 plt call stubs. */
+ do
+ {
+ prev = PREV_SEC (tail);
+ /* Set up this stub group. */
+ htab->stub_group[tail->id].link_sec = curr;
+ }
+ while (tail != curr && (tail = prev) != NULL);
+
+ /* But wait, there's more! Input sections up to stub_group_size
+ bytes before the stub section can be handled by it too. */
+ if (!stubs_always_before_branch)
+ {
+ total = 0;
+ while (prev != NULL
+ && ((total += tail->output_offset - prev->output_offset)
+ < stub_group_size))
+ {
+ tail = prev;
+ prev = PREV_SEC (tail);
+ htab->stub_group[tail->id].link_sec = curr;
+ }
+ }
+ tail = prev;
+ }
+ }
+ while (list-- != htab->input_list);
+ free (htab->input_list);
+#undef PREV_SEC
+}
+
+/* Determine and set the size of the stub section for a final link.
+
+ The basic idea here is to examine all the relocations looking for
+ PC-relative calls to a target that is unreachable with a "bl"
+ instruction. */
+
+boolean
+ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
+ add_stub_section, layout_sections_again)
+ bfd *output_bfd;
+ bfd *stub_bfd;
+ struct bfd_link_info *info;
+ bfd_signed_vma group_size;
+ asection * (*add_stub_section) PARAMS ((const char *, asection *));
+ void (*layout_sections_again) PARAMS ((void));
+{
+ bfd_size_type stub_group_size;
+ boolean stubs_always_before_branch;
+ struct ppc_link_hash_table *htab = ppc_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;
+ stubs_always_before_branch = group_size < 0;
+ if (group_size < 0)
+ stub_group_size = -group_size;
+ else
+ stub_group_size = group_size;
+ if (stub_group_size == 1)
+ {
+ /* Default values. */
+ stub_group_size = 30720000;
+ if (htab->has_14bit_branch)
+ stub_group_size = 30000;
+ }
+
+ group_sections (htab, stub_group_size, stubs_always_before_branch);
+
+ while (1)
+ {
+ bfd *input_bfd;
+ unsigned int bfd_indx;
+ asection *stub_sec;
+ boolean stub_changed;
+
+ htab->stub_iteration += 1;
+ stub_changed = false;
+
+ 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 = NULL;
+
+ /* We'll need the symbol table in a second. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (symtab_hdr->sh_info == 0)
+ continue;
+
+ /* 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_elf64_link_read_relocs (input_bfd, section, NULL,
+ (Elf_Internal_Rela *) 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 ppc_stub_type stub_type;
+ struct ppc_stub_hash_entry *stub_entry;
+ asection *sym_sec;
+ bfd_vma sym_value;
+ bfd_vma destination;
+ struct ppc_link_hash_entry *hash;
+ char *stub_name;
+ const asection *id_sec;
+
+ r_type = ELF64_R_TYPE (irela->r_info);
+ r_indx = ELF64_R_SYM (irela->r_info);
+
+ if (r_type >= (unsigned int) R_PPC_max)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
+ }
+
+ /* Only look for stubs on branch instructions. */
+ if (r_type != (unsigned int) R_PPC64_REL24
+ && r_type != (unsigned int) R_PPC64_REL14
+ && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
+ && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
+ continue;
+
+ /* Now determine the call target, its name, value,
+ section. */
+ sym_sec = NULL;
+ sym_value = 0;
+ destination = 0;
+ hash = NULL;
+ if (r_indx < symtab_hdr->sh_info)
+ {
+ /* It's a local symbol. */
+ Elf_Internal_Sym *sym;
+ Elf_Internal_Shdr *hdr;
+
+ if (local_syms == NULL)
+ {
+ 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);
+ if (local_syms == NULL)
+ goto error_ret_free_internal;
+ }
+ sym = local_syms + r_indx;
+ hdr = elf_elfsections (input_bfd)[sym->st_shndx];
+ sym_sec = hdr->bfd_section;
+ if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
+ sym_value = sym->st_value;
+ 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;
+ hash = ((struct ppc_link_hash_entry *)
+ elf_sym_hashes (input_bfd)[e_indx]);
+
+ while (hash->elf.root.type == bfd_link_hash_indirect
+ || hash->elf.root.type == bfd_link_hash_warning)
+ hash = ((struct ppc_link_hash_entry *)
+ hash->elf.root.u.i.link);
+
+ if (hash->elf.root.type == bfd_link_hash_defined
+ || hash->elf.root.type == bfd_link_hash_defweak)
+ {
+ sym_sec = hash->elf.root.u.def.section;
+ sym_value = hash->elf.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 if (hash->elf.root.type == bfd_link_hash_undefweak)
+ ;
+ else if (hash->elf.root.type == bfd_link_hash_undefined)
+ ;
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
+ }
+ }
+
+ /* Determine what (if any) linker stub is needed. */
+ stub_type = ppc_type_of_stub (section, irela, &hash,
+ destination);
+ if (stub_type == ppc_stub_none)
+ continue;
+
+ /* Support for grouping stub sections. */
+ id_sec = htab->stub_group[section->id].link_sec;
+
+ /* Get the name of this stub. */
+ stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
+ if (!stub_name)
+ goto error_ret_free_internal;
+
+ stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
+ stub_name, false, false);
+ if (stub_entry != NULL)
+ {
+ /* The proper stub has already been created. */
+ free (stub_name);
+ continue;
+ }
+
+ stub_entry = ppc_add_stub (stub_name, section, htab);
+ if (stub_entry == NULL)
+ {
+ free (stub_name);
+ error_ret_free_internal:
+ if (elf_section_data (section)->relocs == NULL)
+ free (internal_relocs);
+ error_ret_free_local:
+ if (local_syms != NULL
+ && (symtab_hdr->contents
+ != (unsigned char *) local_syms))
+ free (local_syms);
+ return false;
+ }
- /* If any dynamic relocs apply to a read-only section,
- then we need a DT_TEXTREL entry. */
- elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, (PTR) info);
+ stub_entry->target_value = sym_value;
+ stub_entry->target_section = sym_sec;
+ stub_entry->stub_type = stub_type;
+ stub_entry->h = hash;
+ stub_changed = true;
+ }
- if ((info->flags & DF_TEXTREL) != 0)
+ /* We're done with the internal relocs, free them. */
+ if (elf_section_data (section)->relocs != internal_relocs)
+ free (internal_relocs);
+ }
+
+ if (local_syms != NULL
+ && symtab_hdr->contents != (unsigned char *) local_syms)
{
- if (!add_dynamic_entry (DT_TEXTREL, 0))
- return false;
+ if (!info->keep_memory)
+ free (local_syms);
+ else
+ symtab_hdr->contents = (unsigned char *) local_syms;
}
}
- }
-#undef add_dynamic_entry
-
- return true;
-}
-
-/* Called after we have seen all the input files/sections, but before
- final symbol resolution and section placement has been determined.
- We use this hook to provide a value for TOCstart, which we store in
- the output bfd elf_gp. */
-
-boolean
-ppc64_elf_set_toc (obfd, info)
- bfd *obfd;
- struct bfd_link_info *info;
-{
- if (!info->relocateable)
- {
- asection *s;
- bfd_vma TOCstart;
+ if (!stub_changed)
+ break;
- /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
- order. The TOC starts where the first of these sections starts. */
- s = bfd_get_section_by_name (obfd, ".got");
- if (s == NULL)
- s = bfd_get_section_by_name (obfd, ".toc");
- if (s == NULL)
- s = bfd_get_section_by_name (obfd, ".tocbss");
- if (s == NULL)
- s = bfd_get_section_by_name (obfd, ".plt");
- if (s == NULL)
+ /* 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)
{
- /* This may happen for
- o references to TOC base (SYM@toc / TOC[tc0]) without a
- .toc directive
- o bad linker script
- o --gc-sections and empty TOC sections
-
- FIXME: Warn user? */
-
- /* Look for a likely section. We probably won't even be
- using TOCstart. */
- for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
- == (SEC_ALLOC | SEC_SMALL_DATA))
- break;
- if (s == NULL)
- for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
- == (SEC_ALLOC | SEC_SMALL_DATA))
- break;
- if (s == NULL)
- for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
- break;
- if (s == NULL)
- for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
- break;
+ stub_sec->_raw_size = 0;
+ stub_sec->_cooked_size = 0;
}
+ htab->sbrlt->_raw_size = 0;
+ htab->sbrlt->_cooked_size = 0;
- TOCstart = 0;
- if (s != NULL)
- TOCstart = s->output_section->vma + s->output_offset;
+ bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
- elf_gp (obfd) = TOCstart;
+ /* Ask the linker to do its stuff. */
+ (*htab->layout_sections_again) ();
}
+
+ /* It would be nice to strip .branch_lt from the output if the
+ section is empty, but it's too late. If we strip sections here,
+ the dynamic symbol table is corrupted since the section symbol
+ for the stripped section isn't written. */
+
return true;
}
-/* PowerPC64 .plt entries are 24 bytes long, which doesn't divide
- evenly into 64k. Sometimes with a large enough .plt, we'll need to
- use offsets differing in the high 16 bits when accessing a .plt
- entry from a .plt call stub. This function adjusts the size of
- .stub to accommodate the extra stub instruction needed in such
- cases. */
+/* Called after we have determined section placement. If sections
+ move, we'll be called again. Provide a value for TOCstart. */
-boolean
-ppc64_elf_size_stubs (obfd, info, changed)
+bfd_vma
+ppc64_elf_toc (obfd)
bfd *obfd;
- struct bfd_link_info *info;
- int *changed;
{
- struct ppc_link_hash_table *htab = ppc_hash_table (info);
- bfd_vma plt_offset, next_64k;
- long base, num, extra;
-
- /* .plt and .stub should be both present, or both absent. */
- if ((htab->splt == NULL || htab->splt->_raw_size == 0)
- != (htab->sstub == NULL || htab->sstub->_raw_size == 0))
- abort ();
-
- /* If no .plt, then nothing to do. */
- if (htab->splt == NULL || htab->splt->_raw_size == 0)
- return true;
-
- plt_offset = (htab->splt->output_section->vma
- + htab->splt->output_offset
- - elf_gp (obfd));
- next_64k = (plt_offset + 65535) & -65536;
-
- /* If the .plt doesn't have any entries crossing a 64k boundary,
- then there is no need for bigger stubs. */
- if (next_64k <= plt_offset + htab->splt->_raw_size)
- return true;
+ asection *s;
+ bfd_vma TOCstart;
- /* OK, so we have at least one transition. Since .plt entries are
- 24 bytes long, we'll strike it lucky every 3*64k, with the 64k
- boundary between .plt entries. */
- base = next_64k / 65536;
- num = (plt_offset + htab->splt->_raw_size - next_64k) / 65536;
- extra = (base % 3 + num + 1) * 2 / 3;
-
- /* Allow one extra instruction for each EXTRA. The change in .stub
- may change the location of .toc and .plt. .toc and .plt ought to
- move as a group, but someone might be playing with eg. .plt
- alignment, so don't allow .stub size to decrease. */
- if (htab->sstub->_cooked_size < htab->sstub->_raw_size + extra * 4)
+ /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
+ order. The TOC starts where the first of these sections starts. */
+ s = bfd_get_section_by_name (obfd, ".got");
+ if (s == NULL)
+ s = bfd_get_section_by_name (obfd, ".toc");
+ if (s == NULL)
+ s = bfd_get_section_by_name (obfd, ".tocbss");
+ if (s == NULL)
+ s = bfd_get_section_by_name (obfd, ".plt");
+ if (s == NULL)
{
- htab->sstub->_cooked_size = htab->sstub->_raw_size + extra * 4;
- *changed = true;
+ /* This may happen for
+ o references to TOC base (SYM@toc / TOC[tc0]) without a
+ .toc directive
+ o bad linker script
+ o --gc-sections and empty TOC sections
+
+ FIXME: Warn user? */
+
+ /* Look for a likely section. We probably won't even be
+ using TOCstart. */
+ for (s = obfd->sections; s != NULL; s = s->next)
+ if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
+ == (SEC_ALLOC | SEC_SMALL_DATA))
+ break;
+ if (s == NULL)
+ for (s = obfd->sections; s != NULL; s = s->next)
+ if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
+ == (SEC_ALLOC | SEC_SMALL_DATA))
+ break;
+ if (s == NULL)
+ for (s = obfd->sections; s != NULL; s = s->next)
+ if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
+ break;
+ if (s == NULL)
+ for (s = obfd->sections; s != NULL; s = s->next)
+ if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
+ break;
}
- return true;
-}
-
-/* Build a .plt call stub. */
-static bfd_byte *
-build_plt_stub (obfd, p, offset, glink)
- bfd *obfd;
- bfd_byte *p;
- int offset;
- int glink;
-{
-#define PPC_LO(v) ((v) & 0xffff)
-#define PPC_HI(v) (((v) >> 16) & 0xffff)
-#define PPC_HA(v) PPC_HI ((v) + 0x8000)
+ TOCstart = 0;
+ if (s != NULL)
+ TOCstart = s->output_section->vma + s->output_offset;
- if (glink)
- bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
- bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
- if (!glink)
- bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
- bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
- if (PPC_HA (offset + 8) != PPC_HA (offset))
- bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
- offset += 8;
- bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
- if (PPC_HA (offset + 8) != PPC_HA (offset))
- bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
- offset += 8;
- bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
- bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
- bfd_put_32 (obfd, BCTR, p), p += 4;
- return p;
+ return TOCstart;
}
-/* Build the stubs for one function call. */
+/* 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 gldelf64ppc_finish. */
-static boolean
-build_one_stub (h, inf)
- struct elf_link_hash_entry *h;
- PTR inf;
+boolean
+ppc64_elf_build_stubs (info)
+ struct bfd_link_info *info;
{
- struct bfd_link_info *info;
- struct ppc_link_hash_table *htab;
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ asection *stub_sec;
+ bfd_vma plt_r2;
+ bfd_byte *p;
- if (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- return true;
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ {
+ bfd_size_type size;
- info = (struct bfd_link_info *) inf;
- htab = ppc_hash_table (info);
+ /* Allocate memory to hold the linker stubs. */
+ size = stub_sec->_raw_size;
+ if (size != 0)
+ {
+ stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
+ if (stub_sec->contents == NULL)
+ return false;
+ }
+ stub_sec->_cooked_size = 0;
+ }
- if (htab->elf.dynamic_sections_created
- && h->plt.offset != (bfd_vma) -1)
+ if (htab->splt != NULL)
{
- struct elf_link_hash_entry *fh;
- asection *s;
- bfd_vma plt_r2;
- bfd_byte *p;
unsigned int indx;
- BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
-
- fh = elf_link_hash_lookup (&htab->elf, h->root.root.string - 1,
- false, false, true);
-
- if (fh == NULL)
- abort ();
-
- BFD_ASSERT (((struct ppc_link_hash_entry *) fh)->is_func);
-
- /* Point the function at the linkage stub. This works because
- the only references to the function code sym are calls.
- Function pointer comparisons use the function descriptor. */
- s = htab->sstub;
- fh->root.type = bfd_link_hash_defined;
- fh->root.u.def.section = s;
- fh->root.u.def.value = s->_cooked_size;
-
- /* Build the .plt call stub. */
- plt_r2 = (htab->splt->output_section->vma
- + htab->splt->output_offset
- + h->plt.offset
+ /* Build the .glink plt call stub. */
+ plt_r2 = (htab->splt->output_offset
+ + htab->splt->output_section->vma
- elf_gp (htab->splt->output_section->owner)
- TOC_BASE_OFF);
-
- if (plt_r2 + 0x80000000 > 0xffffffff
- || (plt_r2 & 3) != 0)
- {
- (*_bfd_error_handler)
- (_("linkage table error against `%s'"),
- h->root.root.string);
- bfd_set_error (bfd_error_bad_value);
- htab->plt_overflow = true;
- return false;
- }
- p = s->contents + s->_cooked_size;
- p = build_plt_stub (s->owner, p, (int) plt_r2, 0);
- s->_cooked_size = p - s->contents;
-
- /* Build the .glink lazy link call stub. */
- s = htab->sglink;
- p = s->contents + s->_cooked_size;
- indx = s->reloc_count;
- if (indx < 0x8000)
+ p = htab->sglink->contents;
+ p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
+ while (p < htab->sglink->contents + GLINK_CALL_STUB_SIZE)
{
- bfd_put_32 (s->owner, LI_R0_0 | indx, p);
+ bfd_put_32 (htab->sglink->owner, NOP, p);
p += 4;
}
- else
+
+ /* Build the .glink lazy link call stubs. */
+ indx = 0;
+ while (p < htab->sglink->contents + htab->sglink->_raw_size)
{
- bfd_put_32 (s->owner, LIS_R0_0 | PPC_HI (indx), p);
- p += 4;
- bfd_put_32 (s->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
+ if (indx < 0x8000)
+ {
+ bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
+ p += 4;
+ }
+ else
+ {
+ bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
+ p += 4;
+ bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
+ p += 4;
+ }
+ bfd_put_32 (htab->sglink->owner,
+ B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
+ indx++;
p += 4;
}
- bfd_put_32 (s->owner, B_DOT | ((s->contents - p) & 0x3fffffc), p);
- p += 4;
- s->_cooked_size = p - s->contents;
- s->reloc_count += 1;
+ htab->sglink->_cooked_size = p - htab->sglink->contents;
}
- return true;
-}
-
-boolean
-ppc64_elf_build_stubs (obfd, info)
- bfd *obfd;
- struct bfd_link_info *info;
-{
- struct ppc_link_hash_table *htab = ppc_hash_table (info);
- bfd_vma old_stub_size;
- bfd_vma plt_r2;
- bfd_byte *p;
- /* If no .plt stubs, then nothing to do. */
- if (htab->sstub == NULL || htab->sstub->_raw_size == 0)
- return true;
-
- old_stub_size = htab->sstub->_cooked_size;
- htab->sstub->_cooked_size = 0;
-
- /* Build the .glink plt call stub. */
- plt_r2 = (htab->splt->output_section->vma
- + htab->splt->output_offset
- - elf_gp (obfd)
- - TOC_BASE_OFF);
- p = htab->sglink->contents;
- p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
- while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE)
+ if (htab->sbrlt->_raw_size != 0)
{
- bfd_put_32 (htab->sglink->owner, NOP, p);
- p += 4;
+ htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
+ htab->sbrlt->_raw_size);
+ if (htab->sbrlt->contents == NULL)
+ return false;
}
- htab->sglink->_cooked_size = p - htab->sglink->contents;
- /* Use reloc_count to count entries. */
- htab->sglink->reloc_count = 0;
+ /* Build the stubs as directed by the stub hash table. */
+ bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
- elf_link_hash_traverse (&htab->elf, build_one_stub, (PTR) info);
- htab->sglink->reloc_count = 0;
-
- if (htab->plt_overflow)
- return false;
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ {
+ if (stub_sec->_raw_size != stub_sec->_cooked_size)
+ break;
+ }
- if (old_stub_size != htab->sstub->_cooked_size
+ if (stub_sec != NULL
|| htab->sglink->_raw_size != htab->sglink->_cooked_size)
{
- (*_bfd_error_handler)
- (_("stub section size doesn't match calculated size"));
- bfd_set_error (bfd_error_bad_value);
- return false;
+ htab->stub_error = true;
+ (*_bfd_error_handler) (_("stubs don't match calculated size"));
}
- return true;
-}
-/* Set up any other section flags and such that may be necessary. */
-
-static boolean
-ppc64_elf_fake_sections (abfd, shdr, asect)
- bfd *abfd ATTRIBUTE_UNUSED;
- Elf64_Internal_Shdr *shdr;
- asection *asect;
-{
- if ((asect->flags & SEC_EXCLUDE) != 0)
- shdr->sh_flags |= SHF_EXCLUDE;
-
- if ((asect->flags & SEC_SORT_ENTRIES) != 0)
- shdr->sh_type = SHT_ORDERED;
-
- return true;
+ return !htab->stub_error;
}
/* The RELOCATE_SECTION function is called by the ELF backend linker
bfd_vma *local_got_offsets;
bfd_vma TOCstart;
boolean ret = true;
+ boolean is_opd;
+ /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
+ boolean is_power4 = false;
+
+ if (info->relocateable)
+ return true;
/* Initialize howto table if needed. */
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
TOCstart = elf_gp (output_bfd);
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
+ is_opd = elf_section_data (input_section)->tdata != NULL;
rel = relocs;
relend = relocs + input_section->reloc_count;
Elf_Internal_Sym *sym;
asection *sec;
struct elf_link_hash_entry *h;
+ struct elf_link_hash_entry *fdh;
const char *sym_name;
unsigned long r_symndx;
bfd_vma relocation;
boolean unresolved_reloc;
- boolean has_nop;
+ boolean warned;
long insn;
+ struct ppc_stub_hash_entry *stub_entry;
+ bfd_vma max_br_offset;
+ bfd_vma from;
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
r_symndx = ELF64_R_SYM (rel->r_info);
-
- if (info->relocateable)
- {
- /* This is a relocatable link. We don't have to change
- anything, unless the reloc is against a section symbol,
- in which case we have to adjust according to where the
- section symbol winds up in the output section. */
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- if ((unsigned) ELF_ST_TYPE (sym->st_info) == STT_SECTION)
- {
- sec = local_sections[r_symndx];
- rel->r_addend += sec->output_offset + sym->st_value;
- }
- }
- continue;
- }
-
- /* This is a final link. */
-
offset = rel->r_offset;
addend = rel->r_addend;
r = bfd_reloc_other;
h = (struct elf_link_hash_entry *) 0;
sym_name = (const char *) 0;
unresolved_reloc = false;
+ warned = false;
if (r_type == R_PPC64_TOC)
{
sym_name = "<local symbol>";
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
+ /* rel may have changed, update our copy of addend. */
addend = rel->r_addend;
+
+ if (elf_section_data (sec) != NULL)
+ {
+ long *opd_sym_adjust;
+
+ opd_sym_adjust = (long *) elf_section_data (sec)->tdata;
+ if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
+ relocation += opd_sym_adjust[sym->st_value / 24];
+ }
}
else
{
|| info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return false;
- relocation = 0;
+ warned = true;
}
}
/* Branch taken prediction relocations. */
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_REL14_BRTAKEN:
- insn = 0x01 << 21; /* Set 't' bit, lowest bit of BO field. */
- /* Fall thru. */
+ insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
+ /* Fall thru. */
/* Branch not taken prediction relocations. */
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_REL14_BRNTAKEN:
insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
- /* Set 'a' bit. This is 0b00010 in BO field for branch on CR(BI)
- insns (BO == 001at or 011at), and 0b01000 for branch on CTR
- insns (BO == 1a00t or 1a01t). */
- if ((insn & (0x14 << 21)) == (0x04 << 21))
- insn |= 0x02 << 21;
- else if ((insn & (0x14 << 21)) == (0x10 << 21))
- insn |= 0x08 << 21;
+ if (is_power4)
+ {
+ /* Set 'a' bit. This is 0b00010 in BO field for branch
+ on CR(BI) insns (BO == 001at or 011at), and 0b01000
+ for branch on CTR insns (BO == 1a00t or 1a01t). */
+ if ((insn & (0x14 << 21)) == (0x04 << 21))
+ insn |= 0x02 << 21;
+ else if ((insn & (0x14 << 21)) == (0x10 << 21))
+ insn |= 0x08 << 21;
+ else
+ break;
+ }
else
- break;
+ {
+ from = (offset
+ + input_section->output_offset
+ + input_section->output_section->vma);
+
+ /* Invert 'y' bit if not the default. */
+ if ((bfd_signed_vma) (relocation + addend - from) < 0)
+ insn ^= 0x01 << 21;
+ }
bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
break;
case R_PPC64_REL24:
- case R_PPC64_ADDR24:
- /* An ADDR24 or REL24 branching to a linkage function may be
- followed by a nop that we have to replace with a ld in
- order to restore the TOC base pointer. Only calls to
- shared objects need to alter the TOC base. These are
- recognized by their need for a PLT entry. */
- has_nop = 0;
+ /* A REL24 branching to a linkage function is followed by a
+ nop. We replace the nop with a ld in order to restore
+ the TOC base pointer. Only calls to shared objects need
+ to alter the TOC base. These are recognized by their
+ need for a PLT entry. */
if (h != NULL
- && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
- /* Make sure that there really is an instruction after
- the branch that we can decode. */
- && offset + 8 <= input_section->_cooked_size)
+ && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
+ && fdh->plt.offset != (bfd_vma) -1
+ && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
+ rel, htab)) != NULL)
{
- bfd_byte *pnext;
+ boolean can_plt_call = 0;
+
+ if (offset + 8 <= input_section->_cooked_size)
+ {
+ insn = bfd_get_32 (input_bfd, contents + offset + 4);
+ if (insn == NOP
+ || insn == CROR_151515 || insn == CROR_313131)
+ {
+ bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
+ contents + offset + 4);
+ can_plt_call = 1;
+ }
+ }
- pnext = contents + offset + 4;
- insn = bfd_get_32 (input_bfd, pnext);
+ if (!can_plt_call)
+ {
+ /* If this is a plain branch rather than a branch
+ and link, don't require a nop. */
+ insn = bfd_get_32 (input_bfd, contents + offset);
+ if ((insn & 1) == 0)
+ can_plt_call = 1;
+ }
- if (insn == 0x60000000 /* nop (ori r0,r0,0) */
- || insn == 0x4def7b82 /* cror 15,15,15 */
- || insn == 0x4ffffb82) /* cror 31,31,31 */
+ if (can_plt_call)
{
- bfd_put_32 (input_bfd,
- (bfd_vma) 0xe8410028, /* ld r2,40(r1) */
- pnext);
- has_nop = 1;
+ relocation = (stub_entry->stub_offset
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma);
+ addend = 0;
+ unresolved_reloc = false;
}
}
if (h != NULL
&& h->root.type == bfd_link_hash_undefweak
- && r_type == R_PPC64_REL24
- && addend == 0
- && relocation == 0)
+ && relocation == 0
+ && addend == 0)
{
- /* Tweak calls to undefined weak functions to behave as
- if the "called" function immediately returns. We can
- thus call to a weak function without first checking
- whether the function is defined. */
- relocation = 4;
- if (has_nop)
- relocation = 8;
+ /* Tweak calls to undefined weak functions to point at a
+ blr. We can thus call a weak function without first
+ checking whether the function is defined. We have a
+ blr at the end of .sfpr. */
+ BFD_ASSERT (htab->sfpr->_raw_size != 0);
+ relocation = (htab->sfpr->_raw_size - 4
+ + htab->sfpr->output_offset
+ + htab->sfpr->output_section->vma);
+ from = (offset
+ + input_section->output_offset
+ + input_section->output_section->vma);
+
+ /* But let's not be silly about it. If the blr isn't in
+ reach, just go to the next instruction. */
+ if (relocation - from + (1 << 25) >= (1 << 26)
+ || htab->sfpr->_raw_size == 0)
+ relocation = from + 4;
}
break;
}
addend -= sec->output_section->vma;
break;
+ case R_PPC64_REL14:
+ case R_PPC64_REL14_BRNTAKEN:
+ case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL24:
break;
/* Relocations that may need to be propagated if this is a
dynamic object. */
- case R_PPC64_REL14:
- case R_PPC64_REL14_BRNTAKEN:
- case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL32:
case R_PPC64_REL64:
case R_PPC64_ADDR14:
if ((input_section->flags & SEC_ALLOC) == 0)
break;
+ if (NO_OPD_RELOCS && is_opd)
+ break;
+
if ((info->shared
&& (IS_ABSOLUTE_RELOC (r_type)
|| (h != NULL
asection *sreloc;
Elf64_External_Rela *loc;
-#if 0
- if (strcmp (bfd_get_section_name (output_bfd, input_section),
- ".opd") == 0)
- break;
-#endif
-
/* When generating a dynamic object, these relocations
are copied into the output file to be resolved at run
time. */
skip = false;
+ relocate = false;
outrel.r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset);
if (outrel.r_offset == (bfd_vma) -1)
skip = true;
-
+ else if (outrel.r_offset == (bfd_vma) -2)
+ skip = true, relocate = true;
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
outrel.r_addend = addend;
if (skip)
- {
- relocate = false;
- memset (&outrel, 0, sizeof outrel);
- }
+ memset (&outrel, 0, sizeof outrel);
else if (h != NULL
&& h->dynindx != -1
+ && !is_opd
&& (!IS_ABSOLUTE_RELOC (r_type)
|| !info->shared
|| !info->symbolic
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))
- {
- relocate = false;
- outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
- }
+ outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
else
{
- /* This symbol is local, or marked to become local. */
+ /* This symbol is local, or marked to become local,
+ or this is an opd section reloc which must point
+ at a local function. */
outrel.r_addend += relocation;
relocate = true;
if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
{
+ if (is_opd && h != NULL)
+ {
+ /* Lie about opd entries. This case occurs
+ when building shared libraries and we
+ reference a function in another shared
+ lib. The same thing happens for a weak
+ definition in an application that's
+ overridden by a strong definition in a
+ shared lib. (I believe this is a generic
+ bug in binutils handling of weak syms.)
+ In these cases we won't use the opd
+ entry in this lib. */
+ unresolved_reloc = false;
+ }
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
}
else
{
long indx = 0;
- if (r_type == R_PPC64_TOC || bfd_is_abs_section (sec))
+ if (bfd_is_abs_section (sec))
;
else if (sec == NULL || sec->owner == NULL)
{
continue;
}
break;
+
+ case R_PPC64_REL14:
+ case R_PPC64_REL14_BRNTAKEN:
+ case R_PPC64_REL14_BRTAKEN:
+ max_br_offset = 1 << 15;
+ goto branch_check;
+
+ case R_PPC64_REL24:
+ max_br_offset = 1 << 25;
+
+ branch_check:
+ /* If the branch is out of reach, then redirect the
+ call to the local stub for this function. */
+ from = (offset
+ + input_section->output_offset
+ + input_section->output_section->vma);
+ if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
+ && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
+ rel, htab)) != NULL)
+ {
+ /* Munge up the value and addend so that we call the stub
+ rather than the procedure directly. */
+ relocation = (stub_entry->stub_offset
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma);
+ addend = 0;
+ }
+ break;
}
- /* FIXME: Why do we allow debugging sections to escape this error?
- More importantly, why do we not emit dynamic relocs above in
- debugging sections (which are ! SEC_ALLOC)? If we had
- emitted the dynamic reloc, we could remove the fudge here. */
+ /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
+ because such sections are not SEC_ALLOC and thus ld.so will
+ not process them. */
if (unresolved_reloc
- && !(info->shared
- && (input_section->flags & SEC_DEBUGGING) != 0
+ && !((input_section->flags & SEC_DEBUGGING) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
- (*_bfd_error_handler)
- (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
- (long) rel->r_offset,
- h->root.root.string);
+ {
+ (*_bfd_error_handler)
+ (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
+ bfd_archive_filename (input_bfd),
+ bfd_get_section_name (input_bfd, input_section),
+ (long) rel->r_offset,
+ h->root.root.string);
+ ret = false;
+ }
r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
input_bfd,
relocation,
addend);
- if (r == bfd_reloc_ok)
- ;
- else if (r == bfd_reloc_overflow)
+ if (r != bfd_reloc_ok)
{
const char *name;
name = bfd_section_name (input_bfd, sec);
}
- if (! ((*info->callbacks->reloc_overflow)
- (info, name, ppc64_elf_howto_table[(int) r_type]->name,
- (bfd_vma) 0, input_bfd, input_section, offset)))
- return false;
+ if (r == bfd_reloc_overflow)
+ {
+ if (warned)
+ continue;
+ if (!((*info->callbacks->reloc_overflow)
+ (info, name, ppc64_elf_howto_table[(int) r_type]->name,
+ rel->r_addend, input_bfd, input_section, offset)))
+ return false;
+ }
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s(%s+0x%lx): reloc against `%s': error %d"),
+ bfd_archive_filename (input_bfd),
+ bfd_get_section_name (input_bfd, input_section),
+ (long) rel->r_offset, name, (int) r);
+ ret = false;
+ }
}
- else
- ret = false;
}
return ret;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
- if (h->plt.offset != (bfd_vma) -1)
+ if (h->plt.offset != (bfd_vma) -1
+ && ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
{
Elf_Internal_Rela rela;
Elf64_External_Rela *loc;
/* This symbol has an entry in the procedure linkage table. Set
- it up. */
+ it up. */
if (htab->splt == NULL
|| htab->srelplt == NULL
|| htab->sglink == NULL)
abort ();
- BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
-
/* Create a JMP_SLOT reloc to inform the dynamic linker to
fill in the PLT entry. */
Elf64_External_Rela *loc;
/* This symbol has an entry in the global offset table. Set it
- up. */
+ up. */
if (htab->sgot == NULL || htab->srelgot == NULL)
abort ();
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
+ asection *s;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
+ htab->sglink->output_offset);
break;
+ case DT_PPC64_OPD:
+ s = bfd_get_section_by_name (output_bfd, ".opd");
+ if (s != NULL)
+ dyn.d_un.d_ptr = s->vma;
+ break;
+
+ case DT_PPC64_OPDSZ:
+ s = bfd_get_section_by_name (output_bfd, ".opd");
+ if (s != NULL)
+ dyn.d_un.d_val = s->_raw_size;
+ break;
+
case DT_PLTGOT:
dyn.d_un.d_ptr = (htab->splt->output_section->vma
+ htab->splt->output_offset);
#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
+#define elf_backend_rela_normal 1
#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
-#define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags
#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
+#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
-#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
+#define elf_backend_object_p ppc64_elf_object_p
#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
#define elf_backend_check_relocs ppc64_elf_check_relocs
#define elf_backend_hide_symbol ppc64_elf_hide_symbol
#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
-#define elf_backend_fake_sections ppc64_elf_fake_sections
#define elf_backend_relocate_section ppc64_elf_relocate_section
#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
projects / deliverable / binutils-gdb.git / blobdiff