/* PowerPC64-specific support for 64-bit ELF.
- Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
+ Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Written by Linus Nordberg, Swox AB <info@swox.com>,
based on elf32-ppc.c by Ian Lance Taylor.
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ppc.h"
-
-#define USE_RELA /* we want RELA relocations, not REL. */
-
+#include "elf64-ppc.h"
static void ppc_howto_init
PARAMS ((void));
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 boolean ppc64_elf_set_private_flags
- PARAMS ((bfd *, flagword));
-static boolean ppc64_elf_copy_private_bfd_data
- PARAMS ((bfd *, bfd *));
+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 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 boolean ppc64_elf_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-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 ppc64_elf_adjust_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-static boolean ppc_adjust_dynindx
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean ppc64_elf_size_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean ppc64_elf_final_link
- PARAMS ((bfd *, struct bfd_link_info *));
-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 *));
-/* Branch prediction bit for branch taken relocs. */
-#define BRANCH_PREDICT_BIT 0x200000
-
-/* 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"
#define PLT_ENTRY_SIZE 24
/* The initial size of the plt reserved for the dynamic linker. */
-#define PLT_INITIAL_ENTRY_SIZE 96
+#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
/* TOC base pointers offset from start of TOC. */
#define TOC_BASE_OFF (0x8000)
-/* Global linkage stub. The first instruction has its offset patched. */
-/* FIXME: Need traceback table? */
-static const unsigned int ppc64_elf_glink_code[] = {
- 0xe9820000, /* ld %r12,0(%r2) */
- 0xf8410028, /* std %r2,40(%r1) */
- 0xe80c0000, /* ld %r0,0(%r12) */
- 0xe84c0008, /* ld %r2,8(%r12) */
- 0x7c0903a6, /* mtctr %r0 */
- 0x4e800420 /* bctr */
-};
-
-#define PPC64_ELF_GLINK_SIZE \
- ((sizeof ppc64_elf_glink_code / sizeof ppc64_elf_glink_code[0]) * 4)
+/* .plt call stub instructions. */
+#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
+#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
+#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
+#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
+#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
+ /* ld %r11,xxx+16@l(%r12) */
+#define BCTR 0x4e800420 /* bctr */
+
+/* The normal stub is this size. */
+#define PLT_CALL_STUB_SIZE (7*4)
+
+/* But sometimes the .plt entry crosses a 64k boundary, and we need
+ to adjust the high word with this insn. */
+#define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
+
+/* The .glink fixup call stub is the same as the .plt call stub, but
+ the first instruction restores r2, and the std is omitted. */
+#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
+
+/* Always allow this much space. */
+#define GLINK_CALL_STUB_SIZE (8*4)
+
+/* Pad with this. */
+#define NOP 0x60000000
+
+/* 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 . */
+
+/* After that, we need two instructions to load the index, followed by
+ 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 */
0xffffffff, /* dst_mask */
true), /* pcrel_offset */
- /* 32-bit relocation to the symbol's procedure linkage table.
- FIXME: R_PPC64_PLT32 not supported. */
+ /* 32-bit relocation to the symbol's procedure linkage table. */
HOWTO (R_PPC64_PLT32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
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. */
- /* FIXME: R_PPC64_PLT64 not supported. */
+ /* 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;
break;
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
break;
- /* FIXME: Is CTOR 32 or 64 bits? Fix md_apply_fix3 in
- gas/config/tc-ppc.c too. */
- case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR32;
+ case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
break;
case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
break;
arelent *cache_ptr;
Elf64_Internal_Rela *dst;
{
+ unsigned int type;
+
+ /* Initialize howto table if needed. */
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
- /* Initialize howto table if needed. */
ppc_howto_init ();
- BFD_ASSERT (ELF64_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
- cache_ptr->howto = ppc64_elf_howto_table[ELF64_R_TYPE (dst->r_info)];
+ type = ELF64_R_TYPE (dst->r_info);
+ BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
+ / sizeof (ppc64_elf_howto_table[0])));
+ cache_ptr->howto = ppc64_elf_howto_table[type];
}
-/* Handle the R_PPC_ADDR16_HA reloc. */
+/* 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 ATTRIBUTE_UNUSED;
+ PTR data;
asection *input_section;
bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+ char **error_message;
{
- bfd_vma relocation;
+ /* 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;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ 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)
{
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
+ /* 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
+ {
+ 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;
+}
- if (reloc_entry->address > input_section->_cooked_size)
- return bfd_reloc_outofrange;
+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 (bfd_is_com_section (symbol->section))
- relocation = 0;
- else
- relocation = symbol->value;
+ /* Subtract the symbol section base address. */
+ reloc_entry->addend -= symbol->section->output_section->vma;
+ return bfd_reloc_continue;
+}
- relocation += symbol->section->output_section->vma;
- relocation += symbol->section->output_offset;
- relocation += reloc_entry->addend;
+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);
- reloc_entry->addend += (relocation & 0x8000) << 1;
+ /* 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;
}
-/* Function to set whether a module needs the -mrelocatable bit set. */
+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);
-static boolean
-ppc64_elf_set_private_flags (abfd, flags)
+ 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;
- flagword flags;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
{
- BFD_ASSERT (!elf_flags_init (abfd)
- || elf_elfheader (abfd)->e_flags == flags);
+ bfd_vma TOCstart;
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = true;
- return true;
+ /* 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;
+
+ /* Adjust the addend for sign extension of the low 16 bits. */
+ reloc_entry->addend += 0x8000;
+ return bfd_reloc_continue;
}
-/* Copy backend specific data from one object module to another. */
-static boolean
-ppc64_elf_copy_private_bfd_data (ibfd, obfd)
- bfd *ibfd;
- bfd *obfd;
+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;
{
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
+ 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. */
- BFD_ASSERT (!elf_flags_init (obfd)
- || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
+static boolean
+ppc64_elf_object_p (abfd)
+ bfd *abfd;
+{
+ if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
+ {
+ Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
- elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
- elf_flags_init (obfd) = 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)
else
msg = _("%s: compiled for a little endian system and target is big endian");
- (*_bfd_error_handler) (msg, bfd_get_filename (ibfd));
+ (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
bfd_set_error (bfd_error_wrong_format);
return false;
}
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
+ 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:
+
+ . .text
+ . x:
+ . bl .foo
+ . nop
+
+ The function definition in another object file might be:
+
+ . .section .opd
+ . foo: .quad .foo
+ . .quad .TOC.@tocbase
+ . .quad 0
+ .
+ . .text
+ . .foo: blr
+
+ When the linker resolves the call during a static link, the branch
+ unsurprisingly just goes to .foo and the .opd information is unused.
+ If the function definition is in a shared library, things are a little
+ different: The call goes via a plt call stub, the opd information gets
+ copied to the plt, and the linker patches the nop.
+
+ . x:
+ . bl .foo_stub
+ . ld 2,40(1)
+ .
+ .
+ . .foo_stub:
+ . addis 12,2,Lfoo@toc@ha # in practice, the call stub
+ . addi 12,12,Lfoo@toc@l # is slightly optimised, but
+ . std 2,40(1) # this is the general idea
+ . ld 11,0(12)
+ . ld 2,8(12)
+ . mtctr 11
+ . ld 11,16(12)
+ . bctr
+ .
+ . .section .plt
+ . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
+
+ The "reloc ()" notation is supposed to indicate that the linker emits
+ an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
+ copying.
+
+ What are the difficulties here? Well, firstly, the relocations
+ examined by the linker in check_relocs are against the function code
+ sym .foo, while the dynamic relocation in the plt is emitted against
+ the function descriptor symbol, foo. Somewhere along the line, we need
+ to carefully copy dynamic link information from one symbol to the other.
+ Secondly, the generic part of the elf linker will make .foo a dynamic
+ symbol as is normal for most other backends. We need foo dynamic
+ instead, at least for an application final link. However, when
+ 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. */
+
+/* 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.
+ This is so that it can later discard them if they are found to be
+ unnecessary. We store the information in a field extending the
+ regular ELF linker hash table. */
+
+struct ppc_dyn_relocs
+{
+ struct ppc_dyn_relocs *next;
- 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;
- }
+ /* The input section of the reloc. */
+ asection *sec;
- else if (new_flags == old_flags)
- /* Compatible flags are ok. */
- ;
+ /* Total number of relocs copied for the input section. */
+ bfd_size_type count;
- 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_get_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_get_filename (ibfd));
- }
+ /* Number of pc-relative relocs copied for the input section. */
+ bfd_size_type pc_count;
+};
- /* 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;
+/* Of those relocs that might be copied as dynamic relocs, this macro
+ selects between relative and absolute types. */
+
+#define IS_ABSOLUTE_RELOC(RTYPE) \
+ ((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
+};
- /* 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;
+struct ppc_stub_hash_entry {
- /* 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);
+ /* Base hash table entry structure. */
+ struct bfd_hash_entry root;
- new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
- old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+ /* The stub section. */
+ asection *stub_sec;
- /* 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_get_filename (ibfd), (long) new_flags, (long) old_flags);
- }
+ /* Offset within stub_sec of the beginning of this stub. */
+ bfd_vma stub_offset;
- if (error)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- }
+ /* 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;
- return true;
-}
+ enum ppc_stub_type stub_type;
-/* Handle a PowerPC specific section when reading an object file. This
- is called when elfcode.h finds a section with an unknown type. */
+ /* The symbol table entry, if any, that this was derived from. */
+ struct ppc_link_hash_entry *h;
-static boolean
-ppc64_elf_section_from_shdr (abfd, hdr, name)
- bfd *abfd;
- Elf64_Internal_Shdr *hdr;
- char *name;
-{
- asection *newsect;
- flagword flags;
+ /* 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;
+};
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
+struct ppc_branch_hash_entry {
- newsect = hdr->bfd_section;
- flags = bfd_get_section_flags (abfd, newsect);
- if (hdr->sh_flags & SHF_EXCLUDE)
- flags |= SEC_EXCLUDE;
+ /* Base hash table entry structure. */
+ struct bfd_hash_entry root;
- if (hdr->sh_type == SHT_ORDERED)
- flags |= SEC_SORT_ENTRIES;
+ /* Offset within .branch_lt. */
+ unsigned int offset;
- bfd_set_section_flags (abfd, newsect, flags);
- return true;
-}
-\f
-/* The following routines are specific to the ELF linker, while
- routines above are used generally. They appear in this file more
- or less in the order in which they are called from external
- routines. eg. ppc64_elf_check_relocs is called early in the link
- process, ppc64_elf_finish_dynamic_sections is one of the last
- functions called. */
+ /* Generation marker. */
+ unsigned int iter;
+};
-/* Create the .glink section as well as the ordinary dynamic
- sections. */
+struct ppc_link_hash_entry
+{
+ struct elf_link_hash_entry elf;
-static boolean
-ppc64_elf_create_dynamic_sections (abfd, info)
+ /* 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 ppc_link_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 *splt;
+ asection *srelplt;
+ asection *sdynbss;
+ asection *srelbss;
+ asection *sglink;
+ asection *sfpr;
+ asection *sbrlt;
+ asection *srelbrlt;
+
+ /* Set on error. */
+ 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 *
+link_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_link_hash_entry));
+ if (entry == NULL)
+ return entry;
+ }
+
+ /* Call the allocation method of the superclass. */
+ entry = _bfd_elf_link_hash_newfunc (entry, table, string);
+ if (entry != NULL)
+ {
+ 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;
+}
+
+/* Create a ppc64 ELF linker hash table. */
+
+static struct bfd_link_hash_table *
+ppc64_elf_link_hash_table_create (abfd)
bfd *abfd;
+{
+ struct ppc_link_hash_table *htab;
+ bfd_size_type amt = sizeof (struct ppc_link_hash_table);
+
+ 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))
+ {
+ 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->sglink = NULL;
+ 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;
{
- asection *s;
+ struct ppc_link_hash_table *htab;
flagword flags;
- if (!_bfd_elf_create_dynamic_sections (abfd, info))
+ 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;
- /* Our .plt just contains pointers, no code. */
- s = bfd_get_section_by_name (abfd, ".plt");
- if (s == NULL)
+ /* 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. */
+
+static boolean
+create_got_section (dynobj, info)
+ bfd *dynobj;
+ struct bfd_link_info *info;
+{
+ struct ppc_link_hash_table *htab;
+
+ if (! _bfd_elf_create_got_section (dynobj, info))
return false;
- flags = bfd_get_section_flags (abfd, s);
- flags &= ~SEC_CODE;
- if (! bfd_set_section_flags (abfd, s, flags))
+
+ htab = ppc_hash_table (info);
+ htab->sgot = bfd_get_section_by_name (dynobj, ".got");
+ if (!htab->sgot)
+ abort ();
+
+ htab->srelgot = bfd_make_section (dynobj, ".rela.got");
+ if (!htab->srelgot
+ || ! bfd_set_section_flags (dynobj, htab->srelgot,
+ (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_READONLY))
+ || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
+ return false;
+ return true;
+}
+
+/* Create the dynamic sections, and set up shortcuts. */
+
+static boolean
+ppc64_elf_create_dynamic_sections (dynobj, info)
+ bfd *dynobj;
+ struct bfd_link_info *info;
+{
+ struct ppc_link_hash_table *htab;
+
+ htab = ppc_hash_table (info);
+ if (!htab->sgot && !create_got_section (dynobj, info))
return false;
- /* Create .glink for global linkage functions. */
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
- s = bfd_make_section (abfd, ".glink");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, 3))
+ if (!_bfd_elf_create_dynamic_sections (dynobj, info))
return false;
+ htab->splt = bfd_get_section_by_name (dynobj, ".plt");
+ htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
+ htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
+ if (!info->shared)
+ htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
+
+ if (!htab->splt || !htab->srelplt || !htab->sdynbss
+ || (!info->shared && !htab->srelbss))
+ abort ();
+
+ return true;
+}
+
+/* Copy the extra info we tack onto an elf_link_hash_entry. */
+
+static void
+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 = (struct ppc_link_hash_entry *) dir;
+ eind = (struct ppc_link_hash_entry *) ind;
+
+ if (eind->dyn_relocs != NULL)
+ {
+ if (edir->dyn_relocs != NULL)
+ {
+ struct ppc_dyn_relocs **pp;
+ struct ppc_dyn_relocs *p;
+
+ if (ind->root.type == bfd_link_hash_indirect)
+ abort ();
+
+ /* Add reloc counts against the weak sym to the strong sym
+ list. Merge any entries against the same section. */
+ for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
+ {
+ struct ppc_dyn_relocs *q;
+
+ for (q = edir->dyn_relocs; q != NULL; q = q->next)
+ if (q->sec == p->sec)
+ {
+ q->pc_count += p->pc_count;
+ q->count += p->count;
+ *pp = p->next;
+ break;
+ }
+ if (q == NULL)
+ pp = &p->next;
+ }
+ *pp = edir->dyn_relocs;
+ }
+
+ edir->dyn_relocs = eind->dyn_relocs;
+ eind->dyn_relocs = NULL;
+ }
+
+ 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);
+}
+
+/* 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
- allocate space in the global offset table or procedure linkage
- table. */
+ calculate needed space in the global offset table, procedure
+ linkage table, and dynamic reloc sections. */
static boolean
ppc64_elf_check_relocs (abfd, info, sec, relocs)
asection *sec;
const Elf_Internal_Rela *relocs;
{
- bfd *dynobj;
+ struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
- bfd_signed_vma *local_got_refcounts;
asection *sreloc;
- asection *sgot = NULL;
- asection *srelgot = NULL;
+ asection **opd_sym_map;
if (info->relocateable)
return true;
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_check_relocs called for section %s in %s\n",
- bfd_get_section_name (abfd, sec),
- bfd_get_filename (abfd));
-#endif
-
- dynobj = elf_hash_table (info)->dynobj;
+ htab = ppc_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- local_got_refcounts = elf_local_got_refcounts (abfd);
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;
+ 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++)
{
unsigned long r_symndx;
struct elf_link_hash_entry *h;
+ enum elf_ppc_reloc_type r_type;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
else
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- switch (ELF64_R_TYPE (rel->r_info))
+ r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
{
/* GOT16 relocations */
case R_PPC64_GOT16:
- case R_PPC64_GOT16_LO:
- case R_PPC64_GOT16_HI:
- case R_PPC64_GOT16_HA:
case R_PPC64_GOT16_DS:
+ case R_PPC64_GOT16_HA:
+ case R_PPC64_GOT16_HI:
+ case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_LO_DS:
- /* This symbol requires a global offset table entry. */
-
- if (sgot == NULL)
- {
- if (dynobj == NULL)
- elf_hash_table (info)->dynobj = dynobj = abfd;
- if (! _bfd_elf_create_got_section (dynobj, info))
- return false;
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- }
- if (srelgot == NULL
- && (h != NULL || info->shared))
- {
- srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
- if (srelgot == NULL)
- {
- srelgot = bfd_make_section (dynobj, ".rela.got");
- if (srelgot == NULL
- || ! bfd_set_section_flags (dynobj, srelgot,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY))
- || ! bfd_set_section_alignment (dynobj, srelgot, 2))
- return false;
- }
- }
+ /* This symbol requires a global offset table entry. */
+ if (htab->sgot == NULL
+ && !create_got_section (htab->elf.dynobj, info))
+ return false;
if (h != NULL)
{
- if (h->got.refcount == -1)
- {
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- if (!bfd_elf64_link_record_dynamic_symbol (info, h))
- return false;
-
- /* Allocate space in the .got. */
- sgot->_raw_size += 8;
- /* Allocate relocation space. */
- srelgot->_raw_size += sizeof (Elf64_External_Rela);
-
- h->got.refcount = 1;
- }
- else
- h->got.refcount++;
+ h->got.refcount += 1;
}
else
{
+ bfd_signed_vma *local_got_refcounts;
+
/* This is a global offset table entry for a local symbol. */
+ local_got_refcounts = elf_local_got_refcounts (abfd);
if (local_got_refcounts == NULL)
{
- size_t size;
+ bfd_size_type size;
- size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
- local_got_refcounts = (bfd_signed_vma *)
- bfd_alloc (abfd, size);
+ size = symtab_hdr->sh_info;
+ size *= sizeof (bfd_signed_vma);
+ local_got_refcounts = ((bfd_signed_vma *)
+ bfd_zalloc (abfd, size));
if (local_got_refcounts == NULL)
return false;
elf_local_got_refcounts (abfd) = local_got_refcounts;
- memset (local_got_refcounts, -1, size);
- }
- if (local_got_refcounts[r_symndx] == -1)
- {
- sgot->_raw_size += 8;
-
- /* If we are generating a shared object, we need to
- output a R_PPC64_RELATIVE reloc so that the
- dynamic linker can adjust this GOT entry. */
- if (info->shared)
- srelgot->_raw_size += sizeof (Elf64_External_Rela);
-
- local_got_refcounts[r_symndx] = 1;
}
- else
- local_got_refcounts[r_symndx]++;
+ local_got_refcounts[r_symndx] += 1;
}
break;
- case R_PPC64_PLT64:
- case R_PPC64_PLT32:
- case R_PPC64_PLT16_LO:
- case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_HA:
- case R_PPC64_PLTGOT16_DS:
- case R_PPC64_PLTGOT16_LO_DS:
-#ifdef DEBUG
- fprintf (stderr, "Reloc requires a PLT entry\n");
-#endif
+ case R_PPC64_PLT16_HI:
+ case R_PPC64_PLT16_LO:
+ 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;
}
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf64_link_record_dynamic_symbol (info, h))
- return false;
- }
- if (h->plt.refcount == -1)
- {
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
- h->plt.refcount = 1;
- }
- else
- h->plt.refcount++;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ h->plt.refcount += 1;
+ ((struct ppc_link_hash_entry *) h)->is_func = 1;
break;
/* The following relocations don't need to propagate the
return false;
break;
- /* When creating a shared object, we must copy these
- relocs into the output file. We create a reloc
- section in dynobj and make room for the reloc. */
- case R_PPC64_REL64:
- case R_PPC64_REL32:
- case R_PPC64_REL24:
case R_PPC64_REL14:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL14_BRNTAKEN:
- if (h == NULL)
- break;
- /* fall through */
+ htab->has_14bit_branch = 1;
+ /* Fall through. */
+
+ case R_PPC64_REL24:
+ if (h != NULL
+ && h->root.root.string[0] == '.'
+ && h->root.root.string[1] != 0)
+ {
+ /* We may need a .plt entry if the function this reloc
+ refers to is in a shared lib. */
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ h->plt.refcount += 1;
+ ((struct ppc_link_hash_entry *) h)->is_func = 1;
+ }
+ break;
+
+ case R_PPC64_ADDR64:
+ if (opd_sym_map != NULL
+ && h != NULL
+ && h->root.root.string[0] == '.'
+ && h->root.root.string[1] != 0)
+ {
+ struct elf_link_hash_entry *fdh;
+ fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
+ false, false, false);
+ if (fdh != NULL)
+ {
+ ((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_ADDR14:
+ case R_PPC64_ADDR14_BRNTAKEN:
+ case R_PPC64_ADDR14_BRTAKEN:
+ case R_PPC64_ADDR16:
+ case R_PPC64_ADDR16_DS:
+ case R_PPC64_ADDR16_HA:
+ case R_PPC64_ADDR16_HI:
+ case R_PPC64_ADDR16_HIGHER:
+ case R_PPC64_ADDR16_HIGHERA:
+ case R_PPC64_ADDR16_HIGHEST:
+ case R_PPC64_ADDR16_HIGHESTA:
+ case R_PPC64_ADDR16_LO:
+ case R_PPC64_ADDR16_LO_DS:
+ case R_PPC64_ADDR24:
+ case R_PPC64_ADDR30:
+ case R_PPC64_ADDR32:
+ case R_PPC64_UADDR16:
+ case R_PPC64_UADDR32:
+ case R_PPC64_UADDR64:
case R_PPC64_TOC:
- /* fall through */
+ /* Don't propagate .opd relocs. */
+ if (NO_OPD_RELOCS && opd_sym_map != NULL)
+ break;
- default:
- if (info->shared)
+ /* If we are creating a shared library, and this is a reloc
+ against a global symbol, or a non PC relative reloc
+ against a local symbol, then we need to copy the reloc
+ into the shared library. However, if we are linking with
+ -Bsymbolic, we do not need to copy a reloc against a
+ global symbol which is defined in an object we are
+ including in the link (i.e., DEF_REGULAR is set). At
+ this point we have not seen all the input files, so it is
+ possible that DEF_REGULAR is not set now but will be set
+ later (it is never cleared). In case of a weak definition,
+ DEF_REGULAR may be cleared later by a strong definition in
+ a shared library. We account for that possibility below by
+ storing information in the relocs_copied field of the hash
+ table entry. A similar situation occurs when creating
+ shared libraries and symbol visibility changes render the
+ symbol local.
+
+ If on the other hand, we are creating an executable, we
+ may need to keep relocations for symbols satisfied by a
+ dynamic library if we manage to avoid copy relocs for the
+ symbol. */
+ if ((info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && (IS_ABSOLUTE_RELOC (r_type)
+ || (h != NULL
+ && (! info->symbolic
+ || h->root.type == bfd_link_hash_defweak
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ || (!info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && h != NULL
+ && (h->root.type == bfd_link_hash_defweak
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)))
{
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_check_relocs need to create relocation for %s\n",
- (h && h->root.root.string
- ? h->root.root.string
- : "<unknown>"));
-#endif
+ struct ppc_dyn_relocs *p;
+ struct ppc_dyn_relocs **head;
+
+ /* We must copy these reloc types into the output file.
+ Create a reloc section in dynobj and make room for
+ this reloc. */
if (sreloc == NULL)
{
const char *name;
+ bfd *dynobj;
name = (bfd_elf_string_from_elf_section
(abfd,
if (name == NULL)
return false;
- BFD_ASSERT (strncmp (name, ".rela", 5) == 0
- && strcmp (bfd_get_section_name (abfd, sec),
- name + 5) == 0);
+ if (strncmp (name, ".rela", 5) != 0
+ || strcmp (bfd_get_section_name (abfd, sec),
+ name + 5) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: bad relocation section name `%s\'"),
+ bfd_archive_filename (abfd), name);
+ bfd_set_error (bfd_error_bad_value);
+ }
+ dynobj = htab->elf.dynobj;
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
{
flags |= SEC_ALLOC | SEC_LOAD;
if (sreloc == NULL
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
- || ! bfd_set_section_alignment (dynobj, sreloc, 2))
+ || ! bfd_set_section_alignment (dynobj, sreloc, 3))
return false;
}
+ elf_section_data (sec)->sreloc = sreloc;
+ }
+
+ /* If this is a global symbol, we count the number of
+ relocations we need for this symbol. */
+ if (h != NULL)
+ {
+ head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
+ }
+ else
+ {
+ /* Track dynamic relocs needed for local syms too.
+ We really need local syms available to do this
+ easily. Oh well. */
+
+ asection *s;
+ s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
+ sec, r_symndx);
+ if (s == NULL)
+ return false;
+
+ head = ((struct ppc_dyn_relocs **)
+ &elf_section_data (s)->local_dynrel);
}
- sreloc->_raw_size += sizeof (Elf64_External_Rela);
+ p = *head;
+ if (p == NULL || p->sec != sec)
+ {
+ p = ((struct ppc_dyn_relocs *)
+ bfd_alloc (htab->elf.dynobj,
+ (bfd_size_type) sizeof *p));
+ if (p == NULL)
+ return false;
+ p->next = *head;
+ *head = p;
+ p->sec = sec;
+ p->count = 0;
+ p->pc_count = 0;
+ }
- /* FIXME: We should here do what the m68k and i386
- backends do: if the reloc is pc-relative, record it
- in case it turns out that the reloc is unnecessary
- because the symbol is forced local by versioning or
- we are linking with -Bdynamic. Fortunately this
- case is not frequent. */
+ p->count += 1;
+ if (!IS_ABSOLUTE_RELOC (r_type))
+ p->pc_count += 1;
}
+ 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)
{
- switch (ELF64_R_TYPE (rel->r_info))
+ 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 R_PPC64_GNU_VTINHERIT:
case R_PPC64_GNU_VTENTRY:
{
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
{
- if (! (elf_bad_symtab (abfd)
- && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
- && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
- && sym->st_shndx != SHN_COMMON))
- {
- 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 entry reference counts for the section being removed. */
+/* Update the .got, .plt. and dynamic reloc reference counts for the
+ section being removed. */
static boolean
ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
+
+ elf_section_data (sec)->local_dynrel = NULL;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
- switch (ELF64_R_TYPE (rel->r_info))
- {
- case R_PPC64_GOT16:
- case R_PPC64_GOT16_LO:
- case R_PPC64_GOT16_HI:
- case R_PPC64_GOT16_HA:
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx >= symtab_hdr->sh_info)
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h->got.refcount > 0)
- h->got.refcount--;
- }
- else
- {
- if (local_got_refcounts[r_symndx] > 0)
- local_got_refcounts[r_symndx]--;
- }
- break;
-
- case R_PPC64_PLT32:
- case R_PPC64_PLT16_LO:
- case R_PPC64_PLT16_HI:
- case R_PPC64_PLT16_HA:
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx >= symtab_hdr->sh_info)
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h->plt.refcount > 0)
- h->plt.refcount--;
- }
- break;
+ {
+ unsigned long r_symndx;
+ enum elf_ppc_reloc_type r_type;
+ struct elf_link_hash_entry *h;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ case R_PPC64_GOT16:
+ case R_PPC64_GOT16_DS:
+ case R_PPC64_GOT16_HA:
+ case R_PPC64_GOT16_HI:
+ case R_PPC64_GOT16_LO:
+ case R_PPC64_GOT16_LO_DS:
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->got.refcount > 0)
+ h->got.refcount--;
+ }
+ else
+ {
+ if (local_got_refcounts[r_symndx] > 0)
+ local_got_refcounts[r_symndx]--;
+ }
+ break;
+
+ case R_PPC64_PLT16_HA:
+ case R_PPC64_PLT16_HI:
+ case R_PPC64_PLT16_LO:
+ case R_PPC64_PLT32:
+ case R_PPC64_PLT64:
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->plt.refcount > 0)
+ h->plt.refcount--;
+ }
+ 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)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->plt.refcount > 0)
+ h->plt.refcount--;
+ }
+ break;
+
+ case R_PPC64_REL32:
+ case R_PPC64_REL64:
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ struct ppc_link_hash_entry *eh;
+ struct ppc_dyn_relocs **pp;
+ struct ppc_dyn_relocs *p;
+
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ eh = (struct ppc_link_hash_entry *) h;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
+ if (p->sec == sec)
+ {
+ p->pc_count -= 1;
+ p->count -= 1;
+ if (p->count == 0)
+ *pp = p->next;
+ break;
+ }
+ }
+ break;
+
+ case R_PPC64_ADDR14:
+ case R_PPC64_ADDR14_BRNTAKEN:
+ case R_PPC64_ADDR14_BRTAKEN:
+ case R_PPC64_ADDR16:
+ case R_PPC64_ADDR16_DS:
+ case R_PPC64_ADDR16_HA:
+ case R_PPC64_ADDR16_HI:
+ case R_PPC64_ADDR16_HIGHER:
+ case R_PPC64_ADDR16_HIGHERA:
+ case R_PPC64_ADDR16_HIGHEST:
+ case R_PPC64_ADDR16_HIGHESTA:
+ case R_PPC64_ADDR16_LO:
+ case R_PPC64_ADDR16_LO_DS:
+ case R_PPC64_ADDR24:
+ case R_PPC64_ADDR30:
+ case R_PPC64_ADDR32:
+ case R_PPC64_ADDR64:
+ case R_PPC64_UADDR16:
+ case R_PPC64_UADDR32:
+ case R_PPC64_UADDR64:
+ case R_PPC64_TOC:
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ struct ppc_link_hash_entry *eh;
+ struct ppc_dyn_relocs **pp;
+ struct ppc_dyn_relocs *p;
+
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ eh = (struct ppc_link_hash_entry *) h;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
+ if (p->sec == sec)
+ {
+ p->count -= 1;
+ if (p->count == 0)
+ *pp = p->next;
+ break;
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ return true;
+}
+
+/* Called via elf_link_hash_traverse to transfer dynamic linking
+ information on function code symbol entries to their corresponding
+ function descriptor symbol entries. */
+static boolean
+func_desc_adjust (h, inf)
+ struct elf_link_hash_entry *h;
+ PTR inf;
+{
+ struct bfd_link_info *info;
+ struct ppc_link_hash_table *htab;
+
+ 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 this is a function code symbol, transfer dynamic linking
+ information to the function descriptor symbol. */
+ 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 ppc_link_hash_entry *) h)->oh;
+ boolean force_local;
+
+ /* Find the corresponding function descriptor symbol. Create it
+ as undefined if necessary. */
+
+ if (fdh == NULL)
+ fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
+ false, false, true);
+
+ if (fdh == NULL
+ && info->shared
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ bfd *abfd;
+ asymbol *newsym;
+
+ 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;
+ newsym->value = 0;
+ newsym->flags = BSF_OBJECT;
+ if (h->root.type == bfd_link_hash_undefweak)
+ newsym->flags |= BSF_WEAK;
+
+ if ( !(_bfd_generic_link_add_one_symbol
+ (info, abfd, newsym->name, newsym->flags,
+ newsym->section, newsym->value, NULL, false, false,
+ (struct bfd_link_hash_entry **) &fdh)))
+ {
+ return false;
+ }
+ fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
+ }
+
+ if (fdh != NULL
+ && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
+ && (info->shared
+ || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
+ {
+ if (fdh->dynindx == -1)
+ if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
+ return false;
+ 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));
+ 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;
+ ((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
+ function code sym info. Any function code syms for which we
+ don't have a definition in a regular file, we force local.
+ 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 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 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;
+}
+
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. The current definition is in some section of the
+ dynamic object, but we're not including those sections. We have to
+ change the definition to something the rest of the link can
+ understand. */
+
+static boolean
+ppc64_elf_adjust_dynamic_symbol (info, h)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+{
+ struct ppc_link_hash_table *htab;
+ struct ppc_link_hash_entry * eh;
+ struct ppc_dyn_relocs *p;
+ asection *s;
+ unsigned int power_of_two;
+
+ htab = ppc_hash_table (info);
+
+ /* Deal with function syms. */
+ if (h->type == STT_FUNC
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ {
+ /* Clear procedure linkage table information for any symbol that
+ won't need a .plt entry. */
+ if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
+ || h->plt.refcount <= 0
+ || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
+ || (! info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ }
+ return true;
+ }
+ else
+ h->plt.offset = (bfd_vma) -1;
+
+ /* If this is a weak symbol, and there is a real definition, the
+ processor independent code will have arranged for us to see the
+ real definition first, and we can just use the same value. */
+ if (h->weakdef != NULL)
+ {
+ BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
+ || h->weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->weakdef->root.u.def.section;
+ h->root.u.def.value = h->weakdef->root.u.def.value;
+ return true;
+ }
+
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. */
+
+ /* If we are creating a shared library, we must presume that the
+ only references to the symbol are via the global offset table.
+ For such cases we need not do anything here; the relocations will
+ be handled correctly by relocate_section. */
+ if (info->shared)
+ return true;
+
+ /* If there are no references to this symbol that do not use the
+ GOT, we don't need to generate a copy reloc. */
+ if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
+ return true;
+
+ eh = (struct ppc_link_hash_entry *) h;
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ s = p->sec->output_section;
+ if (s != NULL && (s->flags & SEC_READONLY) != 0)
+ break;
+ }
+
+ /* If we didn't find any dynamic relocs in read-only sections, then
+ we'll be keeping the dynamic relocs and avoiding the copy reloc. */
+ if (p == NULL)
+ {
+ h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
+ return true;
+ }
+
+ /* We must allocate the symbol in our .dynbss section, which will
+ become part of the .bss section of the executable. There will be
+ an entry for this symbol in the .dynsym section. The dynamic
+ object will contain position independent code, so all references
+ from the dynamic object to this symbol will go through the global
+ offset table. The dynamic linker will use the .dynsym entry to
+ determine the address it must put in the global offset table, so
+ both the dynamic object and the regular object will refer to the
+ same memory location for the variable. */
+
+ /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
+ copy the initial value out of the dynamic object and into the
+ runtime process image. We need to remember the offset into the
+ .rela.bss section we are going to use. */
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ {
+ htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
+ }
+
+ /* We need to figure out the alignment required for this symbol. I
+ have no idea how ELF linkers handle this. */
+ power_of_two = bfd_log2 (h->size);
+ if (power_of_two > 4)
+ power_of_two = 4;
+
+ /* Apply the required alignment. */
+ s = htab->sdynbss;
+ s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
+ {
+ if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
+ return false;
+ }
+
+ /* Define the symbol as being at this point in the section. */
+ h->root.u.def.section = s;
+ h->root.u.def.value = s->_raw_size;
+
+ /* Increment the section size to make room for the symbol. */
+ s->_raw_size += h->size;
+
+ return true;
+}
+
+/* If given a function descriptor symbol, hide both the function code
+ sym and the descriptor. */
+static void
+ppc64_elf_hide_symbol (info, h, force_local)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+ boolean force_local;
+{
+ _bfd_elf_link_hash_hide_symbol (info, h, force_local);
+
+ if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
+ {
+ struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
+
+ 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
+ initializing any .plt and .got entries in ppc64_elf_relocate_section. */
+#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
+ ((DYN) \
+ && ((INFO)->shared \
+ || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
+ && ((H)->dynindx != -1 \
+ || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
+
+/* Allocate space in .plt, .got and associated reloc sections for
+ dynamic relocs. */
+
+static boolean
+allocate_dynrelocs (h, inf)
+ struct elf_link_hash_entry *h;
+ PTR inf;
+{
+ struct bfd_link_info *info;
+ struct ppc_link_hash_table *htab;
+ asection *s;
+ struct ppc_link_hash_entry *eh;
+ struct ppc_dyn_relocs *p;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return true;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ info = (struct bfd_link_info *) inf;
+ htab = ppc_hash_table (info);
+
+ if (htab->elf.dynamic_sections_created
+ && h->plt.refcount > 0
+ && h->dynindx != -1)
+ {
+ BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
+
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
+ {
+ /* If this is the first .plt entry, make room for the special
+ first entry. */
+ s = htab->splt;
+ if (s->_raw_size == 0)
+ s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
+
+ h->plt.offset = s->_raw_size;
+
+ /* Make room for this entry. */
+ s->_raw_size += PLT_ENTRY_SIZE;
+
+ /* Make room for the .glink code. */
+ s = htab->sglink;
+ if (s->_raw_size == 0)
+ s->_raw_size += GLINK_CALL_STUB_SIZE;
+ /* We need bigger stubs past index 32767. */
+ if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
+ s->_raw_size += 4;
+ s->_raw_size += 2*4;
+
+ /* We also need to make an entry in the .rela.plt section. */
+ s = htab->srelplt;
+ s->_raw_size += sizeof (Elf64_External_Rela);
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ }
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ }
+
+ if (h->got.refcount > 0)
+ {
+ boolean dyn;
+
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ {
+ if (! bfd_elf64_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ s = htab->sgot;
+ h->got.offset = s->_raw_size;
+ s->_raw_size += 8;
+ dyn = htab->elf.dynamic_sections_created;
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
+ htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
+ }
+ else
+ h->got.offset = (bfd_vma) -1;
+
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh->dyn_relocs == NULL)
+ return true;
+
+ /* In the shared -Bsymbolic case, discard space allocated for
+ dynamic pc-relative relocs against symbols which turn out to be
+ defined in regular objects. For the normal shared case, discard
+ space for relocs that have become local due to symbol visibility
+ changes. */
+
+ if (info->shared)
+ {
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
+ || info->symbolic))
+ {
+ struct ppc_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+ }
+ else
+ {
+ /* For the non-shared case, discard space for relocs against
+ symbols which turn out to need copy relocs or are not
+ dynamic. */
+
+ if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
+ && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ || (htab->elf.dynamic_sections_created
+ && (h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined))))
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ {
+ if (! bfd_elf64_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ /* If that succeeded, we know we'll be keeping all the
+ relocs. */
+ if (h->dynindx != -1)
+ goto keep;
+ }
+
+ eh->dyn_relocs = NULL;
+
+ keep: ;
+ }
+
+ /* Finally, allocate space. */
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *sreloc = elf_section_data (p->sec)->sreloc;
+ sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
+ }
+
+ return true;
+}
+
+/* Find any dynamic relocs that apply to read-only sections. */
+
+static boolean
+readonly_dynrelocs (h, inf)
+ struct elf_link_hash_entry *h;
+ PTR inf;
+{
+ 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)
+ {
+ asection *s = p->sec->output_section;
+
+ if (s != NULL && (s->flags & SEC_READONLY) != 0)
+ {
+ struct bfd_link_info *info = (struct bfd_link_info *) inf;
+
+ info->flags |= DF_TEXTREL;
+
+ /* Not an error, just cut short the traversal. */
+ return false;
+ }
+ }
+ return true;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static boolean
+ppc64_elf_size_dynamic_sections (output_bfd, info)
+ bfd *output_bfd ATTRIBUTE_UNUSED;
+ struct bfd_link_info *info;
+{
+ struct ppc_link_hash_table *htab;
+ bfd *dynobj;
+ asection *s;
+ boolean relocs;
+ bfd *ibfd;
+
+ htab = ppc_hash_table (info);
+ dynobj = htab->elf.dynobj;
+ if (dynobj == NULL)
+ abort ();
+
+ if (htab->elf.dynamic_sections_created)
+ {
+ /* Set the contents of the .interp section to the interpreter. */
+ if (! info->shared)
+ {
+ s = bfd_get_section_by_name (dynobj, ".interp");
+ if (s == NULL)
+ abort ();
+ s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
+ }
+
+ /* Set up .got offsets for local syms, and space for local dynamic
+ relocs. */
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ bfd_signed_vma *local_got;
+ bfd_signed_vma *end_local_got;
+ bfd_size_type locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+ asection *srel;
+
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
+ continue;
+
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ {
+ struct ppc_dyn_relocs *p;
+
+ for (p = *((struct ppc_dyn_relocs **)
+ &elf_section_data (s)->local_dynrel);
+ p != NULL;
+ p = p->next)
+ {
+ if (!bfd_is_abs_section (p->sec)
+ && bfd_is_abs_section (p->sec->output_section))
+ {
+ /* Input section has been discarded, either because
+ it is a copy of a linkonce section or due to
+ linker script /DISCARD/, so we'll be discarding
+ the relocs too. */
+ }
+ else if (p->count != 0)
+ {
+ 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;
+ }
+ }
+ }
+
+ local_got = elf_local_got_refcounts (ibfd);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_info;
+ end_local_got = local_got + locsymcount;
+ s = htab->sgot;
+ srel = htab->srelgot;
+ for (; local_got < end_local_got; ++local_got)
+ {
+ if (*local_got > 0)
+ {
+ *local_got = s->_raw_size;
+ s->_raw_size += 8;
+ if (info->shared)
+ srel->_raw_size += sizeof (Elf64_External_Rela);
+ }
+ else
+ *local_got = (bfd_vma) -1;
+ }
+ }
+
+ 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);
+
+ /* We now have determined the sizes of the various dynamic sections.
+ Allocate memory for them. */
+ relocs = false;
+ for (s = dynobj->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
+ continue;
+
+ 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. */
+ }
+ else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
+ {
+ if (s->_raw_size == 0)
+ {
+ /* If we don't need this section, strip it from the
+ output file. This is mostly to handle .rela.bss and
+ .rela.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ }
+ else
+ {
+ if (s != htab->srelplt)
+ relocs = true;
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
+ }
+ }
+ else
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (s->_raw_size == 0)
+ {
+ _bfd_strip_section_from_output (info, s);
+ 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. */
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
+ if (s->contents == NULL)
+ return false;
+ }
+
+ if (htab->elf.dynamic_sections_created)
+ {
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in ppc64_elf_finish_dynamic_sections, but we
+ must add the entries now so that we get the correct size for
+ the .dynamic section. The DT_DEBUG entry is filled in by the
+ dynamic linker and used by the debugger. */
+#define add_dynamic_entry(TAG, VAL) \
+ bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
+
+ if (!info->shared)
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return false;
+ }
+
+ if (htab->splt != NULL && htab->splt->_raw_size != 0)
+ {
+ if (!add_dynamic_entry (DT_PLTGOT, 0)
+ || !add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+ || !add_dynamic_entry (DT_JMPREL, 0)
+ || !add_dynamic_entry (DT_PPC64_GLINK, 0))
+ 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;
- default:
- break;
- }
+ /* 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;
}
-/* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
+/* Determine the type of stub needed, if any, for a call. */
-static boolean
-ppc64_elf_adjust_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
+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;
{
- bfd *dynobj = elf_hash_table (info)->dynobj;
- asection *s;
- unsigned int power_of_two;
- bfd_vma plt_offset;
+ struct ppc_link_hash_entry *h = *hash;
+ bfd_vma location;
+ bfd_vma branch_offset;
+ bfd_vma max_branch_offset;
+ unsigned int r_type;
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_adjust_dynamic_symbol called for %s\n",
- h->root.root.string);
-#endif
-
- /* Make sure we know what is going on here. */
- BFD_ASSERT (dynobj != NULL
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
- || h->weakdef != NULL
- || ((h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)));
-
- /* If this is a function, alter the symbol to refer to global
- linkage code, which will be generated by ppc64_elf_relocate_section.
- Also, allocate a slot in the PLT. */
- if (h->type == STT_FUNC
- || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ if (h != NULL)
{
- asection *splt, *sglink;
-
- if (! elf_hash_table (info)->dynamic_sections_created
- || ((!info->shared || info->symbolic || h->dynindx == -1)
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) != 0))
+ if (h->oh != NULL
+ && h->oh->plt.offset != (bfd_vma) -1
+ && h->oh->dynindx != -1)
{
- /* A PLT entry is not required/allowed when:
+ *hash = (struct ppc_link_hash_entry *) h->oh;
+ return ppc_stub_plt_call;
+ }
- 1. We are not using ld.so; because then the PLT entry
- can't be set up, so we can't use one.
+ if (h->elf.root.type == bfd_link_hash_undefweak
+ || h->elf.root.type == bfd_link_hash_undefined)
+ return ppc_stub_none;
+ }
- 2. We know for certain that a symbol is defined in
- this object, because this object is the application,
- is linked with -Bsymbolic, or because the symbol is local.
+ /* Determine where the call point is. */
+ location = (input_sec->output_offset
+ + input_sec->output_section->vma
+ + rel->r_offset);
- We used to end up here for GC if
- (info->shared && h->plt.refcount <= 0)
- We can't use plt.refcount here since
- ppc64_elf_check_relocs can't detect all needs for
- PLT. FIXME: Rewrite GC. */
+ branch_offset = destination - location;
+ r_type = ELF64_R_TYPE (rel->r_info);
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- return true;
- }
+ /* 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;
- splt = bfd_get_section_by_name (dynobj, ".plt");
- sglink = bfd_get_section_by_name (dynobj, ".glink");
- BFD_ASSERT (splt != NULL && sglink != NULL);
+ 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;
- /* If it's a function entry point (the name starts with a dot)
- (FIXME: Could it ever be anything else?), find its
- corresponding function descriptor symbol and make sure it's
- output as a dynamic symbol. Create it as undefined if
- necessary. ppc64_elf_finish_dynamic_symbol will look it up
- again and create a JMP_SLOT reloc for it. FIXME: The second
- lookup could be avoided by adding a new flag to
- elf_link_hash_entry->elf_link_hash_flags. */
+ return ppc_stub_none;
+}
- if (h->root.root.string[0] == '.')
- {
- struct elf_link_hash_entry *fdh;
+/* Build a .plt call stub. */
- /* FIXME: Follow bfd_link_hash_indirect? */
- fdh = elf_link_hash_lookup (elf_hash_table (info),
- h->root.root.string + 1,
- false, false, false);
+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;
+}
- if (fdh == (struct elf_link_hash_entry *) NULL)
- {
- asymbol *newsym;
-
- /* Create it as undefined. */
- newsym = bfd_make_empty_symbol (dynobj);
- BFD_ASSERT (newsym != NULL);
- /* FIXME: Need own copy of name? */
- newsym->name = h->root.root.string + 1;
- newsym->section = bfd_und_section_ptr;
- newsym->value = 0;
- newsym->flags = BSF_DYNAMIC | BSF_OBJECT;
-
- if ( ! (_bfd_generic_link_add_one_symbol
- (info, dynobj, newsym->name, newsym->flags,
- newsym->section, newsym->value,
- NULL, /* string */
- true, /* copy */
- false, /*collect*/
- (struct bfd_link_hash_entry **) &fdh)))
- {
- /* FIXME: Print error message. */
- return false;
- }
- fdh->root.type = bfd_link_hash_undefined;
-#ifdef DEBUG
- fprintf (stderr, "\tcreated %s", newsym->name);
-#endif
- }
-#ifdef DEBUG
- else
- fprintf (stderr, "\tfound %s", fdh->root.root.string);
- fprintf (stderr, "\n");
-#endif
+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);
- BFD_ASSERT (fdh != NULL);
+ /* And this is where we are coming from. */
+ off -= (stub_entry->stub_offset
+ + stub_sec->output_offset
+ + stub_sec->output_section->vma);
- /* Make sure it's output as a dynamic symbol. */
- if (fdh->dynindx == -1)
- {
- if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
- return false;
- }
- BFD_ASSERT (fdh->dynindx != -1);
- }
+ BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
+
+ bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
+ size = 4;
+ break;
- /* If this is the first .plt entry, make room for the special
- first entry. */
- if (splt->_raw_size == 0)
- splt->_raw_size = PLT_INITIAL_ENTRY_SIZE;
-
- plt_offset = splt->_raw_size;
-
- /* FIXME: What about function pointer comparisons in 64-bit PPC?
- We can't use the same trick as 32-bit PPC, since we set the
- symbol to the linkage function. This will make function entry
- point comparison work as expected within one object, but not
- across object boundaries. From the ABI:
-
- In this ABI, the address of a function is actually the address of a
- function descriptor. A reference to a function, other than a function
- call, will normally load the address of the function descriptor from
- the global offset table. The dynamic linker will ensure that for a
- given function, the same address is used for all references to the
- function from any global offset table. Thus, function address
- comparisons will work as expected.
-
- When making a call to the function, the code may refer to the
- procedure linkage table entry, in order to permit lazy symbol
- resolution at run time. In order to support correct function address
- comparisons, the compiler should be careful to only generate
- references to the procedure linkage table entry for function calls.
- For any other use of a function, the compiler should use the real
- address.
-
- I don't see how this could ever work when passing a pointer to
- a function across an object boundary. The compiler has no
- way of knowing how to find the function descriptor for a
- function whose entrypoint is taken as an argument.
-
- Or should the compiler arrange so that the function descriptor
- address is passed and make the callee dig out the entry point
- from that? */
-#if 0
- /* If this symbol is not defined in a regular file, and we are
- not generating a shared library, then set the symbol to this
- location in the .plt. This is required to make function
- pointers compare as equal between the normal executable and
- the shared library. */
- if (! info->shared
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ 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)
{
- h->root.u.def.section = splt;
- h->root.u.def.value = plt_offset;
+ (*_bfd_error_handler) (_("can't find branch stub `%s'"),
+ stub_entry->root.string + 9);
+ htab->stub_error = true;
+ return false;
}
-#endif
-
- /* FIXME: How should a linkage symbol be defined? It shouldn't
- be global, since it can't be used by any other object than
- this one. Set ELF_LINK_FORCED_LOCAL? */
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = sglink;
- h->root.u.def.value = sglink->_raw_size;
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
- h->plt.offset = plt_offset;
- /* Make room for global linkage code in .glink. */
- sglink->_raw_size += PPC64_ELF_GLINK_SIZE;
+ off = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
- /* Make room for this entry in PLT. */
- splt->_raw_size += PLT_ENTRY_SIZE;
+ bfd_put_64 (htab->sbrlt->owner, off,
+ htab->sbrlt->contents + br_entry->offset);
- /* We also need to make an entry in the .rela.plt section. */
- s = bfd_get_section_by_name (dynobj, ".rela.plt");
- BFD_ASSERT (s != NULL);
- s->_raw_size += sizeof (Elf64_External_Rela);
+ if (info->shared)
+ {
+ /* Create a reloc for the branch lookup table entry. */
+ Elf_Internal_Rela rela;
+ Elf64_External_Rela *r;
- return true;
- }
+ 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;
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->weakdef != NULL)
- {
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
- || h->weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->weakdef->root.u.def.section;
- h->root.u.def.value = h->weakdef->root.u.def.value;
- return true;
- }
+ r = (Elf64_External_Rela *) htab->srelbrlt->contents;
+ r += htab->srelbrlt->reloc_count++;
+ bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
+ }
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
+ off = (br_entry->offset
+ + htab->sbrlt->output_offset
+ + htab->sbrlt->output_section->vma
+ - elf_gp (htab->sbrlt->output_section->owner)
+ - TOC_BASE_OFF);
- /* If we are creating a shared library, we must presume that the
- only references to the symbol are via the global offset table.
- For such cases we need not do anything here; the relocations will
- be handled correctly by relocate_section. */
- if (info->shared)
- return true;
+ if (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;
+ }
- /* We must allocate the symbol in our .dynbss section, which will
- become part of the .bss section of the executable. There will be
- an entry for this symbol in the .dynsym section. The dynamic
- object will contain position independent code, so all references
- from the dynamic object to this symbol will go through the global
- offset table. The dynamic linker will use the .dynsym entry to
- determine the address it must put in the global offset table, so
- both the dynamic object and the regular object will refer to the
- same memory location for the variable. */
- s = bfd_get_section_by_name (dynobj, ".dynbss");
- BFD_ASSERT (s != NULL);
+ 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;
- /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
- copy the initial value out of the dynamic object and into the
- runtime process image. We need to remember the offset into the
- .rela.bss section we are going to use. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
- {
- asection *srel;
+ 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;
+ }
- srel = bfd_get_section_by_name (dynobj, ".rela.bss");
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf64_External_Rela);
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
- }
+ /* Now build the stub. */
+ off = stub_entry->h->elf.plt.offset;
+ if (off >= (bfd_vma) -2)
+ abort ();
- /* We need to figure out the alignment required for this symbol. I
- have no idea how ELF linkers handle this. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 4)
- power_of_two = 4;
+ off &= ~ (bfd_vma) 1;
+ off += (htab->splt->output_offset
+ + htab->splt->output_section->vma
+ - elf_gp (htab->splt->output_section->owner)
+ - TOC_BASE_OFF);
- /* Apply the required alignment. */
- s->_raw_size = BFD_ALIGN (s->_raw_size,
- (bfd_size_type) (1 << power_of_two));
- if (power_of_two > bfd_get_section_alignment (dynobj, s))
- {
- if (! bfd_set_section_alignment (dynobj, s, power_of_two))
- return false;
- }
+ 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;
+ }
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->_raw_size;
+ p = build_plt_stub (stub_bfd, loc, (int) off, 0);
+ size = p - loc;
+ break;
- /* Increment the section size to make room for the symbol. */
- s->_raw_size += h->size;
+ default:
+ BFD_FAIL ();
+ return false;
+ }
+ stub_sec->_cooked_size += size;
return true;
}
-/* Increment the index of a dynamic symbol by a given amount. Called
- via elf_link_hash_traverse. */
+/* 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_adjust_dynindx (h, cparg)
- struct elf_link_hash_entry *h;
- PTR cparg;
+ppc_size_one_stub (gen_entry, in_arg)
+ struct bfd_hash_entry *gen_entry;
+ PTR in_arg;
{
- int *cp = (int *) cparg;
+ struct ppc_stub_hash_entry *stub_entry;
+ struct ppc_link_hash_table *htab;
+ bfd_vma off;
+ int size;
-#ifdef DEBUG
- fprintf (stderr,
- "ppc_adjust_dynindx: h->dynindx = %ld, *cp = %d (%s)\n",
- h->dynindx, *cp,
- h->root.root.string ? h->root.root.string : "<unknown>");
-#endif
+ /* 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 (h->dynindx != -1)
- h->dynindx += *cp;
+ 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 the sizes of the dynamic sections. */
+/* 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. */
-static boolean
-ppc64_elf_size_dynamic_sections (output_bfd, info)
+int
+ppc64_elf_setup_section_lists (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
- bfd *dynobj;
- asection *s;
- boolean plt;
- boolean relocs;
- boolean reltext;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_size_dynamic_sections called\n");
-#endif
-
- dynobj = elf_hash_table (info)->dynobj;
- BFD_ASSERT (dynobj != NULL);
-
- if (elf_hash_table (info)->dynamic_sections_created)
+ 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)
{
- /* Set the contents of the .interp section to the interpreter. */
- if (! info->shared)
+ for (section = input_bfd->sections;
+ section != NULL;
+ section = section->next)
{
- s = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ if (top_id < section->id)
+ top_id = section->id;
}
}
- else
+
+ 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)
{
- /* We may have created entries in the .rela.got section.
- However, if we are not creating the dynamic sections, we will
- not actually use these entries. Reset the size of .rela.got
- which will cause it to get stripped from the output file
- below. */
- s = bfd_get_section_by_name (dynobj, ".rela.got");
- if (s != NULL)
- s->_raw_size = 0;
+ if (top_index < section->index)
+ top_index = section->index;
}
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- plt = false;
- relocs = false;
- reltext = false;
- for (s = dynobj->sections; s != NULL; s = s->next)
+ 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)
{
- const char *name;
- boolean strip;
+ if ((section->flags & SEC_CODE) != 0)
+ input_list[section->index] = NULL;
+ }
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
+ return 1;
+}
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_get_section_name (dynobj, s);
+/* 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. */
- strip = false;
+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 (strcmp (name, ".plt") == 0)
+ if (isec->output_section->index <= htab->top_index)
+ {
+ asection **list = htab->input_list + isec->output_section->index;
+ if (*list != bfd_abs_section_ptr)
{
- if (s->_raw_size == 0)
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- strip = true;
- }
- else
- {
- /* Remember whether there is a PLT. */
- plt = true;
- }
+ /* 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;
}
- else if (strncmp (name, ".rela", 5) == 0)
+ }
+}
+
+/* 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)
{
- if (s->_raw_size == 0)
- {
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rela.bss and
- .rela.plt. We must create both sections in
- create_dynamic_sections, because they must be created
- before the linker maps input sections to output
- sections. The linker does that before
- adjust_dynamic_symbol is called, and it is that
- function which decides whether anything needs to go
- into these sections. */
- strip = true;
- }
+ 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
{
- asection *target;
- const char *outname;
-
- /* Remember whether there are any relocation sections. */
- relocs = true;
-
- /* If this relocation section applies to a read only
- section, then we probably need a DT_TEXTREL entry. */
- outname = bfd_get_section_name (output_bfd,
- s->output_section);
- target = bfd_get_section_by_name (output_bfd, outname + 5);
- if (target != NULL
- && (target->flags & SEC_READONLY) != 0
- && (target->flags & SEC_ALLOC) != 0)
- reltext = true;
+ prev = PREV_SEC (tail);
+ /* Set up this stub group. */
+ htab->stub_group[tail->id].link_sec = curr;
+ }
+ while (tail != curr && (tail = prev) != NULL);
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
+ /* 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;
}
- else if (strcmp (name, ".got") != 0
- && strcmp (name, ".toc") != 0
- && strcmp (name, ".glink") != 0)
+ }
+ 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++)
{
- /* It's not one of our sections, so don't allocate space. */
- continue;
- }
+ 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;
- if (strip)
- {
- _bfd_strip_section_from_output (info, s);
- continue;
- }
+ 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;
+ }
-#ifdef DEBUG
- fprintf (stderr, "\tallocating %lu bytes for section %s\n",
- (unsigned long) s->_raw_size, name);
-#endif
+ 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;
+ }
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return false;
- }
+ 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 (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Add some entries to the .dynamic section. We fill in the
- values later, in ppc64_elf_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
- if (! info->shared)
- {
- if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0))
- return false;
- }
+ /* We're done with the internal relocs, free them. */
+ if (elf_section_data (section)->relocs != internal_relocs)
+ free (internal_relocs);
+ }
- if (plt)
- {
- if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0)
- || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0)
- || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
- || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0))
- return false;
+ 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;
+ }
}
- if (relocs)
- {
- if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0)
- || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0)
- || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT,
- sizeof (Elf64_External_Rela)))
- return false;
- }
+ if (!stub_changed)
+ break;
- if (reltext)
+ /* 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)
{
- if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0))
- return false;
+ stub_sec->_raw_size = 0;
+ stub_sec->_cooked_size = 0;
}
- }
+ htab->sbrlt->_raw_size = 0;
+ htab->sbrlt->_cooked_size = 0;
- /* If we are generating a shared library, we generate a section
- symbol for each output section. These are local symbols, which
- means that they must come first in the dynamic symbol table.
- That means we must increment the dynamic symbol index of every
- other dynamic symbol.
+ bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
- FIXME: We assume that there will never be relocations to
- locations in linker-created sections that do not have
- externally-visible names. Instead, we should work out precisely
- which sections relocations are targetted at. */
- if (info->shared)
- {
- int c;
+ /* Ask the linker to do its stuff. */
+ (*htab->layout_sections_again) ();
+ }
- for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
- {
- if ((s->flags & SEC_LINKER_CREATED) != 0
- || (s->flags & SEC_ALLOC) == 0)
- {
- elf_section_data (s)->dynindx = -1;
- continue;
- }
+ /* 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. */
- /* These symbols will have no names, so we don't need to
- fiddle with dynstr_index. */
+ return true;
+}
- elf_section_data (s)->dynindx = c + 1;
+/* Called after we have determined section placement. If sections
+ move, we'll be called again. Provide a value for TOCstart. */
- c++;
- }
+bfd_vma
+ppc64_elf_toc (obfd)
+ bfd *obfd;
+{
+ asection *s;
+ bfd_vma TOCstart;
- elf_link_hash_traverse (elf_hash_table (info),
- ppc_adjust_dynindx,
- (PTR) &c);
- elf_hash_table (info)->dynsymcount += c;
+ /* 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)
+ {
+ /* 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;
-}
+ TOCstart = 0;
+ if (s != NULL)
+ TOCstart = s->output_section->vma + s->output_offset;
-/* Called after we have seen all the input files/sections, but before
- final symbol resolution and section placement has been determined.
+ return TOCstart;
+}
- We use this hook to provide a value for TOCstart, which we store in
- the output bfd elf_gp, then we call the generic ELF final link
- routine. */
+/* 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
-ppc64_elf_final_link (abfd, info)
- bfd *abfd;
+boolean
+ppc64_elf_build_stubs (info)
struct bfd_link_info *info;
{
- if (! info->relocateable)
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ asection *stub_sec;
+ bfd_vma plt_r2;
+ bfd_byte *p;
+
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
{
- asection *s;
- bfd_vma TOCstart;
+ bfd_size_type size;
- /* The TOC consists of sections .got, .toc, .tocbss, .plt in this
- order. The TOC starts where the first of these sections starts. */
- s = bfd_get_section_by_name (abfd, ".got");
- if (s == NULL)
- s = bfd_get_section_by_name (abfd, ".toc");
- if (s == NULL)
- s = bfd_get_section_by_name (abfd, ".tocbss");
- if (s == NULL)
- s = bfd_get_section_by_name (abfd, ".plt");
- if (s == NULL)
+ /* Allocate memory to hold the linker stubs. */
+ size = stub_sec->_raw_size;
+ if (size != 0)
{
- /* 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 = abfd->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 = abfd->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 = abfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
- break;
- if (s == NULL)
- for (s = abfd->sections; s != NULL; s = s->next)
- if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
- break;
+ stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
+ if (stub_sec->contents == NULL)
+ return false;
}
+ stub_sec->_cooked_size = 0;
+ }
- TOCstart = 0;
- if (s != NULL)
- TOCstart = s->output_section->vma + s->output_offset;
+ if (htab->splt != NULL)
+ {
+ unsigned int indx;
+
+ /* 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);
+ 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 (htab->sglink->owner, NOP, p);
+ p += 4;
+ }
- elf_gp (abfd) = TOCstart;
+ /* Build the .glink lazy link call stubs. */
+ indx = 0;
+ while (p < htab->sglink->contents + htab->sglink->_raw_size)
+ {
+ 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;
+ }
+ htab->sglink->_cooked_size = p - htab->sglink->contents;
}
- /* Invoke the regular gc ELF backend linker to do all the work. */
- return _bfd_elf64_gc_common_final_link (abfd, info);
-}
+ if (htab->sbrlt->_raw_size != 0)
+ {
+ htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
+ htab->sbrlt->_raw_size);
+ if (htab->sbrlt->contents == NULL)
+ return false;
+ }
-/* Set up any other section flags and such that may be necessary. */
+ /* Build the stubs as directed by the stub hash table. */
+ bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
-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;
+ 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 ((asect->flags & SEC_SORT_ENTRIES) != 0)
- shdr->sh_type = SHT_ORDERED;
+ if (stub_sec != NULL
+ || htab->sglink->_raw_size != htab->sglink->_cooked_size)
+ {
+ htab->stub_error = true;
+ (*_bfd_error_handler) (_("stubs don't match calculated size"));
+ }
- return true;
+ return !htab->stub_error;
}
/* The RELOCATE_SECTION function is called by the ELF backend linker
Elf_Internal_Sym *local_syms;
asection **local_sections;
{
+ struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
- bfd *dynobj;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- asection *sreloc;
- asection *splt;
- asection *sgot;
bfd_vma *local_got_offsets;
bfd_vma TOCstart;
boolean ret = true;
- long insn;
+ boolean is_opd;
+ /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
+ boolean is_power4 = false;
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_relocate_section called for %s section %s, %ld relocations%s\n",
- bfd_get_filename (input_bfd),
- bfd_section_name (input_bfd, input_section),
- (long) input_section->reloc_count,
- (info->relocateable) ? " (relocatable)" : "");
-#endif
+ if (info->relocateable)
+ return true;
+ /* Initialize howto table if needed. */
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
- /* Initialize howto table if needed. */
ppc_howto_init ();
+ htab = ppc_hash_table (info);
local_got_offsets = elf_local_got_offsets (input_bfd);
-
- sreloc = NULL;
- splt = NULL;
- sgot = NULL;
- dynobj = elf_hash_table (info)->dynobj;
- if (dynobj != NULL)
- {
- splt = bfd_get_section_by_name (dynobj, ".plt");
- sgot = bfd_get_section_by_name (dynobj, ".got");
- }
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;
for (; rel < relend; rel++)
Elf_Internal_Sym *sym;
asection *sec;
struct elf_link_hash_entry *h;
+ struct elf_link_hash_entry *fdh;
const char *sym_name;
- reloc_howto_type *howto;
unsigned long r_symndx;
bfd_vma relocation;
+ boolean unresolved_reloc;
+ 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);
offset = rel->r_offset;
addend = rel->r_addend;
r = bfd_reloc_other;
sec = (asection *) 0;
h = (struct elf_link_hash_entry *) 0;
sym_name = (const char *) 0;
+ unresolved_reloc = false;
+ warned = false;
- /* Unknown relocation handling. */
- if ((unsigned) r_type >= (unsigned) R_PPC_max
- || !ppc64_elf_howto_table[(int) r_type])
- {
- (*_bfd_error_handler) (_("%s: unknown relocation type %d"),
- bfd_get_filename (input_bfd),
- (int) r_type);
- bfd_set_error (bfd_error_bad_value);
- ret = false;
- continue;
- }
-
- howto = ppc64_elf_howto_table[(int) r_type];
- 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];
- addend = rel->r_addend += sec->output_offset + sym->st_value;
- }
- }
-
-#ifdef DEBUG
- fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
- howto->name,
- (int) r_type,
- r_symndx,
- (long) offset,
- (long) addend);
-#endif
- continue;
- }
-
- /* This is a final link. */
-
- /* Set `relocation'. */
if (r_type == R_PPC64_TOC)
{
/* Relocation value is TOC base. Symbol is ignored. */
sec = local_sections[r_symndx];
sym_name = "<local symbol>";
- relocation = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
+ 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
{
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
sym_name = h->root.root.string;
+ relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
- if ((r_type == R_PPC64_PLT32
- && h->plt.offset != (bfd_vma) -1)
- || ((r_type == R_PPC64_GOT16
- || r_type == R_PPC64_GOT16_LO
- || r_type == R_PPC64_GOT16_HI
- || r_type == R_PPC64_GOT16_HA
- || r_type == R_PPC64_GOT16_DS
- || r_type == R_PPC64_GOT16_LO_DS)
- && elf_hash_table (info)->dynamic_sections_created
- && (! info->shared
- || (! info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))
- || (info->shared
- && ((! info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)
- && (input_section->flags & SEC_ALLOC) != 0
- && (r_type == R_PPC64_ADDR64
- || r_type == R_PPC64_ADDR32
- || r_type == R_PPC64_ADDR24
- || r_type == R_PPC64_ADDR16
- || r_type == R_PPC64_ADDR16_LO
- || r_type == R_PPC64_ADDR16_DS
- || r_type == R_PPC64_ADDR16_LO_DS
- || r_type == R_PPC64_ADDR16_HI
- || r_type == R_PPC64_ADDR16_HA
- || r_type == R_PPC64_ADDR16_HIGHER
- || r_type == R_PPC64_ADDR16_HIGHERA
- || r_type == R_PPC64_ADDR16_HIGHEST
- || r_type == R_PPC64_ADDR16_HIGHESTA
- || r_type == R_PPC64_ADDR14
- || r_type == R_PPC64_ADDR14_BRTAKEN
- || r_type == R_PPC64_ADDR14_BRNTAKEN
- || r_type == R_PPC64_COPY
- || r_type == R_PPC64_GLOB_DAT
- || r_type == R_PPC64_JMP_SLOT
- || r_type == R_PPC64_UADDR64
- || r_type == R_PPC64_UADDR32
- || r_type == R_PPC64_UADDR16)))
- {
- /* In these cases, we don't need the relocation
- value. We check specially because in some
- obscure cases sec->output_section will be NULL. */
- relocation = 0;
- }
+ if (sec->output_section == NULL)
+ /* Set a flag that will be cleared later if we find a
+ relocation value for this symbol. output_section
+ is typically NULL for symbols satisfied by a shared
+ library. */
+ unresolved_reloc = true;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
- relocation = 0;
- else if (info->shared && !info->symbolic && !info->no_undefined)
- relocation = 0;
+ ;
+ else if (info->shared
+ && (!info->symbolic || info->allow_shlib_undefined)
+ && !info->no_undefined
+ && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
+ ;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
- rel->r_offset, (!info->shared
- || info->no_undefined
- || ELF_ST_VISIBILITY (h->other)))))
+ offset, (!info->shared
+ || info->no_undefined
+ || ELF_ST_VISIBILITY (h->other)))))
return false;
- relocation = 0;
- }
- }
-
- switch ((int) r_type)
- {
- case (int) R_PPC64_ADDR16_DS:
- case (int) R_PPC64_ADDR16_LO_DS:
- case (int) R_PPC64_GOT16_DS:
- case (int) R_PPC64_GOT16_LO_DS:
- case (int) R_PPC64_PLT16_LO_DS:
- case (int) R_PPC64_SECTOFF_DS:
- case (int) R_PPC64_SECTOFF_LO_DS:
- case (int) R_PPC64_TOC16_DS:
- case (int) R_PPC64_TOC16_LO_DS:
- case (int) R_PPC64_PLTGOT16_DS:
- case (int) R_PPC64_PLTGOT16_LO_DS:
- if (((relocation + addend) & 3) != 0)
- {
- (*_bfd_error_handler) (_("%s: error: relocation %s not a multiple of 4"),
- bfd_get_filename (input_bfd),
- howto->name);
- bfd_set_error (bfd_error_bad_value);
- ret = false;
- continue;
+ warned = true;
}
}
- /* Set `addend'. */
- switch ((int) r_type)
+ /* First handle relocations that tweak non-addend part of insn. */
+ insn = 0;
+ switch (r_type)
{
default:
- (*_bfd_error_handler) (_("%s: unknown relocation type %d for symbol %s"),
- bfd_get_filename (input_bfd),
- (int) r_type, sym_name);
+ break;
- bfd_set_error (bfd_error_bad_value);
- ret = false;
- continue;
+ /* Branch taken prediction relocations. */
+ case R_PPC64_ADDR14_BRTAKEN:
+ case R_PPC64_REL14_BRTAKEN:
+ insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
+ /* Fall thru. */
- /* Relocations that may need to be propagated if this is a shared
- object. */
- case (int) R_PPC64_REL24:
- case (int) R_PPC64_ADDR24:
- /* An ADDR24 or REL24 branching to a linkage function may be
- followed by a nop that we have to replace with an 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. */
- && (rel->r_offset - input_section->vma + 8
- <= input_section->_cooked_size))
+ /* 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);
+ if (is_power4)
{
- bfd_byte *pnext;
- unsigned long insn;
-
- pnext = contents + (rel->r_offset - input_section->vma) + 4;
- insn = bfd_get_32 (input_bfd, pnext);
-
- if (insn == 0x60000000 /* nop (ori r0,r0,0) */
- || insn == 0x4def7b82 /* cror 15,15,15 */
- || insn == 0x4ffffb82) /* cror 31,31,31 */
- {
- bfd_put_32 (input_bfd, 0xe8410028, pnext); /* ld r2,40(r1) */
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_relocate_section: " \
- "patched nop after call to %s\n", sym_name);
-#endif
- }
+ /* 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;
}
- /* fall through */
-
- case (int) R_PPC64_REL64:
- case (int) R_PPC64_REL32:
- case (int) R_PPC64_REL14:
- /* If these relocations are not to a named symbol, they can be
- handled right here, no need to bother the dynamic linker. */
- if (h == NULL && r_type != R_PPC64_ADDR24)
- break;
- /* fall through */
-
- /* Relocations that always need to be propagated if this is a shared
- object. */
- case (int) R_PPC64_NONE:
- case (int) R_PPC64_ADDR64:
- case (int) R_PPC64_ADDR32:
- case (int) R_PPC64_ADDR16:
- case (int) R_PPC64_ADDR16_LO:
- case (int) R_PPC64_ADDR16_DS:
- case (int) R_PPC64_ADDR16_LO_DS:
- case (int) R_PPC64_ADDR16_HI:
- case (int) R_PPC64_ADDR16_HA:
- case (int) R_PPC64_ADDR16_HIGHER:
- case (int) R_PPC64_ADDR16_HIGHERA:
- case (int) R_PPC64_ADDR16_HIGHEST:
- case (int) R_PPC64_ADDR16_HIGHESTA:
- case (int) R_PPC64_ADDR14:
- case (int) R_PPC64_UADDR64:
- case (int) R_PPC64_UADDR32:
- case (int) R_PPC64_UADDR16:
- case (int) R_PPC64_TOC:
- if (info->shared)
+ else
{
- Elf_Internal_Rela outrel;
- boolean skip;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_relocate_section need to create relocation for %s\n",
- (h && h->root.root.string
- ? h->root.root.string
- : "<unknown>"));
-#endif
+ from = (offset
+ + input_section->output_offset
+ + input_section->output_section->vma);
- /* When generating a shared object, these relocations
- are copied into the output file to be resolved at run
- time. */
-
- if (sreloc == NULL)
- {
- const char *name;
-
- name = (bfd_elf_string_from_elf_section
- (input_bfd,
- elf_elfheader (input_bfd)->e_shstrndx,
- elf_section_data (input_section)->rel_hdr.sh_name));
- if (name == NULL)
- return false;
-
- BFD_ASSERT (strncmp (name, ".rela", 5) == 0
- && strcmp (bfd_get_section_name (input_bfd,
- input_section),
- name + 5) == 0);
+ /* Invert 'y' bit if not the default. */
+ if ((bfd_signed_vma) (relocation + addend - from) < 0)
+ insn ^= 0x01 << 21;
+ }
- sreloc = bfd_get_section_by_name (dynobj, name);
- BFD_ASSERT (sreloc != NULL);
- }
+ bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
+ break;
- skip = false;
+ case R_PPC64_REL24:
+ /* 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
+ && (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)
+ {
+ boolean can_plt_call = 0;
- if (elf_section_data (input_section)->stab_info == NULL)
- outrel.r_offset = rel->r_offset;
- else
+ if (offset + 8 <= input_section->_cooked_size)
{
- bfd_vma off;
-
- off = (_bfd_stab_section_offset
- (output_bfd, &elf_hash_table (info)->stab_info,
- input_section,
- &elf_section_data (input_section)->stab_info,
- rel->r_offset));
- if (off == (bfd_vma) -1)
- skip = true;
- outrel.r_offset = off;
+ 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;
+ }
}
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
-
- if (skip)
- memset (&outrel, 0, sizeof outrel);
- /* h->dynindx may be -1 if this symbol was marked to
- become local. */
- else if (h != NULL
- && ((! info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ if (!can_plt_call)
{
- BFD_ASSERT (h->dynindx != -1);
- outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
- outrel.r_addend = rel->r_addend;
+ /* 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;
}
- else
- {
- if (r_type == R_PPC64_ADDR64)
- {
- outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
- outrel.r_addend = relocation + rel->r_addend;
- }
- else
- {
- long indx;
-
- if (h == NULL)
- sec = local_sections[r_symndx];
- else
- {
- BFD_ASSERT (h->root.type == bfd_link_hash_defined
- || (h->root.type
- == bfd_link_hash_defweak));
- sec = h->root.u.def.section;
- }
-
- if (r_type == R_PPC64_TOC
- || (sec != NULL && bfd_is_abs_section (sec)))
- {
- indx = 0;
- }
- else if (sec == NULL || sec->owner == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- else
- {
- asection *osec;
-
- osec = sec->output_section;
- indx = elf_section_data (osec)->dynindx;
- BFD_ASSERT (indx > 0);
-#ifdef DEBUG
- if (indx <= 0)
- {
- printf ("indx=%ld section=%s flags=%08x name=%s\n",
- indx, osec->name, osec->flags,
- h->root.root.string);
- }
-#endif
- }
- outrel.r_info = ELF64_R_INFO (indx, r_type);
- outrel.r_addend = relocation + rel->r_addend;
- }
+ if (can_plt_call)
+ {
+ relocation = (stub_entry->stub_offset
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma);
+ addend = 0;
+ unresolved_reloc = false;
}
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- (((Elf64_External_Rela *)
- sreloc->contents)
- + sreloc->reloc_count));
- ++sreloc->reloc_count;
-
- /* This reloc will be computed at runtime, so there's no
- need to do anything now, unless this is a RELATIVE
- reloc in an unallocated section. */
- if (skip
- || (input_section->flags & SEC_ALLOC) != 0
- || ELF64_R_TYPE (outrel.r_info) != R_PPC64_RELATIVE)
- continue;
}
- /* Arithmetic adjust relocations that aren't going into a
- shared object. */
- if ((r_type == R_PPC64_ADDR16_HA
- || r_type == R_PPC64_ADDR16_HIGHERA
- || r_type == R_PPC64_ADDR16_HIGHESTA)
- /* It's just possible that this symbol is a weak symbol
- that's not actually defined anywhere. In that case,
- 'sec' would be NULL, and we should leave the symbol
- alone (it will be set to zero elsewhere in the link). */
- && sec != NULL)
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefweak
+ && relocation == 0
+ && addend == 0)
{
- addend += ((relocation + addend) & 0x8000) << 1;
+ /* 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;
+ }
- /* Branch taken prediction relocations. */
- case (int) R_PPC64_ADDR14_BRTAKEN:
- case (int) R_PPC64_REL14_BRTAKEN:
- insn = bfd_get_32 (output_bfd, contents + offset);
- if ((relocation - offset) & 0x8000)
- insn &= ~BRANCH_PREDICT_BIT;
- else
- insn |= BRANCH_PREDICT_BIT;
- bfd_put_32 (output_bfd, insn, contents + offset);
- break;
+ /* Set `addend'. */
+ switch (r_type)
+ {
+ default:
+ (*_bfd_error_handler)
+ (_("%s: unknown relocation type %d for symbol %s"),
+ bfd_archive_filename (input_bfd), (int) r_type, sym_name);
- /* Branch not taken predicition relocations. */
- case (int) R_PPC64_ADDR14_BRNTAKEN:
- case (int) R_PPC64_REL14_BRNTAKEN:
- insn = bfd_get_32 (output_bfd, contents + offset);
- if ((relocation - offset) & 0x8000)
- insn |= BRANCH_PREDICT_BIT;
- else
- insn &= ~BRANCH_PREDICT_BIT;
- bfd_put_32 (output_bfd, insn, contents + offset);
- break;
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ continue;
+ case R_PPC64_NONE:
+ case R_PPC_GNU_VTINHERIT:
+ case R_PPC_GNU_VTENTRY:
+ continue;
/* GOT16 relocations. Like an ADDR16 using the symbol's
address in the GOT as relocation value instead of the
symbols value itself. Also, create a GOT entry for the
symbol and put the symbol value there. */
- /* FIXME: If the symbol is not in the .got section
- (typically in the .toc section) we fail (h->got.offset is
- 0). */
- /* NOTE: Sets `relocation'. */
- case (int) R_PPC64_GOT16:
- case (int) R_PPC64_GOT16_LO:
- case (int) R_PPC64_GOT16_HI:
- case (int) R_PPC64_GOT16_HA:
- case (int) R_PPC64_GOT16_DS:
- case (int) R_PPC64_GOT16_LO_DS:
+ case R_PPC64_GOT16:
+ case R_PPC64_GOT16_LO:
+ case R_PPC64_GOT16_HI:
+ case R_PPC64_GOT16_HA:
+ case R_PPC64_GOT16_DS:
+ case R_PPC64_GOT16_LO_DS:
{
/* Relocation is to the entry for this symbol in the global
offset table. */
bfd_vma off;
- BFD_ASSERT (sgot != NULL);
+
+ if (htab->sgot == NULL)
+ abort ();
if (h != NULL)
{
- off = h->got.offset;
- BFD_ASSERT (off != (bfd_vma) -1);
+ boolean dyn;
- if (! elf_hash_table (info)->dynamic_sections_created
+ off = h->got.offset;
+ dyn = htab->elf.dynamic_sections_created;
+ if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
|| (info->shared
- && (info->symbolic || h->dynindx == -1)
+ && (info->symbolic
+ || h->dynindx == -1
+ || (h->elf_link_hash_flags
+ & ELF_LINK_FORCED_LOCAL))
&& (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR)))
{
/* This is actually a static link, or it is a
-Bsymbolic link and the symbol is defined
- locally. We must initialize this entry in the
- global offset table. Since the offset must
- always be a multiple of 4, we use the least
- significant bit to record whether we have
+ locally, or the symbol was forced to be local
+ because of a version file. We must initialize
+ this entry in the global offset table. Since the
+ offset must always be a multiple of 8, we use the
+ least significant bit to record whether we have
initialized it already.
- When doing a dynamic link, we create a .rela.got
+ When doing a dynamic link, we create a .rel.got
relocation entry to initialize the value. This
is done in the finish_dynamic_symbol routine. */
if ((off & 1) != 0)
else
{
bfd_put_64 (output_bfd, relocation,
- sgot->contents + off);
+ htab->sgot->contents + off);
h->got.offset |= 1;
}
}
+ else
+ unresolved_reloc = false;
}
else
{
- BFD_ASSERT (local_got_offsets != NULL
- && local_got_offsets[r_symndx] != (bfd_vma) -1);
+ if (local_got_offsets == NULL)
+ abort ();
off = local_got_offsets[r_symndx];
- /* The offset must always be a multiple of 4. We use
+ /* The offset must always be a multiple of 8. We use
the least significant bit to record whether we have
already processed this entry. */
if ((off & 1) != 0)
off &= ~1;
else
{
- bfd_put_64 (output_bfd, relocation, sgot->contents + off);
+ bfd_put_64 (output_bfd, relocation,
+ htab->sgot->contents + off);
if (info->shared)
{
- asection *srelgot;
Elf_Internal_Rela outrel;
+ Elf64_External_Rela *loc;
/* We need to generate a R_PPC64_RELATIVE reloc
for the dynamic linker. */
- srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ off);
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
outrel.r_addend = relocation;
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- (((Elf64_External_Rela *)
- srelgot->contents)
- + srelgot->reloc_count));
- ++srelgot->reloc_count;
+ loc = (Elf64_External_Rela *) htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++;
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
}
local_got_offsets[r_symndx] |= 1;
}
}
- relocation = sgot->output_offset + off;
+ if (off >= (bfd_vma) -2)
+ abort ();
+
+ relocation = htab->sgot->output_offset + off;
+
/* TOC base (r2) is TOC start plus 0x8000. */
addend -= TOC_BASE_OFF;
- break;
}
+ break;
+
+ case R_PPC64_PLT16_HA:
+ case R_PPC64_PLT16_HI:
+ case R_PPC64_PLT16_LO:
+ case R_PPC64_PLT32:
+ case R_PPC64_PLT64:
+ /* Relocation is to the entry for this symbol in the
+ procedure linkage table. */
+
+ /* Resolve a PLT reloc against a local symbol directly,
+ without using the procedure linkage table. */
+ if (h == NULL)
+ break;
+
+ if (h->plt.offset == (bfd_vma) -1
+ || htab->splt == NULL)
+ {
+ /* We didn't make a PLT entry for this symbol. This
+ happens when statically linking PIC code, or when
+ using -Bsymbolic. */
+ break;
+ }
+
+ relocation = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + h->plt.offset);
+ unresolved_reloc = false;
+ break;
/* TOC16 relocs. We want the offset relative to the TOC base,
which is the address of the start of the TOC plus 0x8000.
The TOC consists of sections .got, .toc, .tocbss, and .plt,
in this order. */
-
- case (int) R_PPC64_TOC16:
- case (int) R_PPC64_TOC16_LO:
- case (int) R_PPC64_TOC16_HI:
- case (int) R_PPC64_TOC16_DS:
- case (int) R_PPC64_TOC16_LO_DS:
- BFD_ASSERT (sec != (asection *) 0);
- /* Only .got, .toc and *UND* symbols are allowed. */
- BFD_ASSERT (bfd_is_und_section (sec)
- || strcmp (bfd_get_section_name (abfd, sec),
- ".got") == 0
- || strcmp (bfd_get_section_name (abfd, sec),
- ".toc") == 0);
-
+ case R_PPC64_TOC16:
+ case R_PPC64_TOC16_LO:
+ case R_PPC64_TOC16_HI:
+ case R_PPC64_TOC16_DS:
+ case R_PPC64_TOC16_LO_DS:
+ case R_PPC64_TOC16_HA:
addend -= TOCstart + TOC_BASE_OFF;
break;
- case (int) R_PPC64_TOC16_HA:
- BFD_ASSERT (sec != (asection *) 0);
- BFD_ASSERT (bfd_is_und_section (sec)
- || strcmp (bfd_get_section_name (abfd, sec),
- ".got") == 0
- || strcmp (bfd_get_section_name (abfd, sec),
- ".toc") == 0);
-
- addend -= TOCstart + TOC_BASE_OFF;
- /* Add 1 to 16-bit word 16:31 if sign bit in 0:15 is set. */
- addend += ((relocation + addend) & 0x8000) << 1;
+ /* Relocate against the beginning of the section. */
+ case R_PPC64_SECTOFF:
+ case R_PPC64_SECTOFF_LO:
+ case R_PPC64_SECTOFF_HI:
+ case R_PPC64_SECTOFF_DS:
+ case R_PPC64_SECTOFF_LO_DS:
+ case R_PPC64_SECTOFF_HA:
+ if (sec != (asection *) 0)
+ addend -= sec->output_section->vma;
break;
- /* Relocate against the beginning of the section. */
- case (int) R_PPC64_SECTOFF:
- case (int) R_PPC64_SECTOFF_LO:
- case (int) R_PPC64_SECTOFF_HI:
- case (int) R_PPC64_SECTOFF_DS:
- case (int) R_PPC64_SECTOFF_LO_DS:
- BFD_ASSERT (sec != (asection *) 0);
- addend -= sec->output_section->vma;
+ case R_PPC64_REL14:
+ case R_PPC64_REL14_BRNTAKEN:
+ case R_PPC64_REL14_BRTAKEN:
+ case R_PPC64_REL24:
break;
- case (int) R_PPC64_SECTOFF_HA:
- BFD_ASSERT (sec != (asection *) 0);
- addend -= sec->output_section->vma;
- addend += ((relocation + addend) & 0x8000) << 1;
+ /* Relocations that may need to be propagated if this is a
+ dynamic object. */
+ case R_PPC64_REL32:
+ case R_PPC64_REL64:
+ case R_PPC64_ADDR14:
+ case R_PPC64_ADDR14_BRNTAKEN:
+ case R_PPC64_ADDR14_BRTAKEN:
+ case R_PPC64_ADDR16:
+ case R_PPC64_ADDR16_DS:
+ case R_PPC64_ADDR16_HA:
+ case R_PPC64_ADDR16_HI:
+ case R_PPC64_ADDR16_HIGHER:
+ case R_PPC64_ADDR16_HIGHERA:
+ case R_PPC64_ADDR16_HIGHEST:
+ case R_PPC64_ADDR16_HIGHESTA:
+ case R_PPC64_ADDR16_LO:
+ case R_PPC64_ADDR16_LO_DS:
+ case R_PPC64_ADDR24:
+ case R_PPC64_ADDR30:
+ case R_PPC64_ADDR32:
+ case R_PPC64_ADDR64:
+ case R_PPC64_UADDR16:
+ case R_PPC64_UADDR32:
+ case R_PPC64_UADDR64:
+ /* r_symndx will be zero only for relocs against symbols
+ from removed linkonce sections, or sections discarded by
+ a linker script. */
+ if (r_symndx == 0)
+ break;
+ /* Fall thru. */
+
+ case R_PPC64_TOC:
+ 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
+ && h->dynindx != -1
+ && (! info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ || (!info->shared
+ && h != NULL
+ && h->dynindx != -1
+ && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
+ && (((h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ || h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined)))
+ {
+ Elf_Internal_Rela outrel;
+ boolean skip, relocate;
+ asection *sreloc;
+ Elf64_External_Rela *loc;
+
+ /* 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)
+ 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))
+ outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
+ else
+ {
+ /* 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 (bfd_is_abs_section (sec))
+ ;
+ else if (sec == NULL || sec->owner == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ else
+ {
+ asection *osec;
+
+ osec = sec->output_section;
+ indx = elf_section_data (osec)->dynindx;
+
+ /* We are turning this relocation into one
+ against a section symbol, so subtract out
+ the output section's address but not the
+ offset of the input section in the output
+ section. */
+ outrel.r_addend -= osec->vma;
+ }
+
+ outrel.r_info = ELF64_R_INFO (indx, r_type);
+ }
+ }
+
+ sreloc = elf_section_data (input_section)->sreloc;
+ if (sreloc == NULL)
+ abort ();
+
+ loc = (Elf64_External_Rela *) sreloc->contents;
+ loc += sreloc->reloc_count++;
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
+
+ /* If this reloc is against an external symbol, it will
+ be computed at runtime, so there's no need to do
+ anything now. */
+ if (! relocate)
+ continue;
+ }
break;
- case (int) R_PPC64_COPY:
- case (int) R_PPC64_GLOB_DAT:
- case (int) R_PPC64_JMP_SLOT:
- case (int) R_PPC64_RELATIVE:
- case (int) R_PPC64_PLT32:
- case (int) R_PPC64_PLTREL32:
- case (int) R_PPC64_PLT16_LO:
- case (int) R_PPC64_PLT16_LO_DS:
- case (int) R_PPC64_PLT16_HI:
- case (int) R_PPC64_PLT16_HA:
- case (int) R_PPC64_PLT64:
- case (int) R_PPC64_PLTREL64:
- case (int) R_PPC64_PLTGOT16:
- case (int) R_PPC64_PLTGOT16_LO:
- case (int) R_PPC64_PLTGOT16_DS:
- case (int) R_PPC64_PLTGOT16_LO_DS:
- case (int) R_PPC64_PLTGOT16_HI:
- case (int) R_PPC64_PLTGOT16_HA:
- (*_bfd_error_handler) (_("%s: Relocation %s is not yet supported for symbol %s."),
- bfd_get_filename (input_bfd),
- ppc64_elf_howto_table[(int) r_type]->name,
- sym_name);
+ case R_PPC64_COPY:
+ case R_PPC64_GLOB_DAT:
+ case R_PPC64_JMP_SLOT:
+ case R_PPC64_RELATIVE:
+ /* We shouldn't ever see these dynamic relocs in relocatable
+ files. */
+ /* Fall thru */
+
+ case R_PPC64_PLTGOT16:
+ case R_PPC64_PLTGOT16_DS:
+ case R_PPC64_PLTGOT16_HA:
+ case R_PPC64_PLTGOT16_HI:
+ case R_PPC64_PLTGOT16_LO:
+ case R_PPC64_PLTGOT16_LO_DS:
+ case R_PPC64_PLTREL32:
+ case R_PPC64_PLTREL64:
+ /* These ones haven't been implemented yet. */
+
+ (*_bfd_error_handler)
+ (_("%s: Relocation %s is not supported for symbol %s."),
+ bfd_archive_filename (input_bfd),
+ ppc64_elf_howto_table[(int) r_type]->name, sym_name);
bfd_set_error (bfd_error_invalid_operation);
ret = false;
continue;
+ }
- case (int) R_PPC_GNU_VTINHERIT:
- case (int) R_PPC_GNU_VTENTRY:
- /* These are no-ops in the end. */
- continue;
+ /* Do any further special processing. */
+ switch (r_type)
+ {
+ default:
+ break;
+
+ case R_PPC64_ADDR16_HA:
+ case R_PPC64_ADDR16_HIGHERA:
+ case R_PPC64_ADDR16_HIGHESTA:
+ case R_PPC64_PLT16_HA:
+ case R_PPC64_TOC16_HA:
+ case R_PPC64_SECTOFF_HA:
+ /* It's just possible that this symbol is a weak symbol
+ that's not actually defined anywhere. In that case,
+ 'sec' would be NULL, and we should leave the symbol
+ alone (it will be set to zero elsewhere in the link). */
+ if (sec != NULL)
+ /* Add 0x10000 if sign bit in 0:15 is set. */
+ addend += ((relocation + addend) & 0x8000) << 1;
+ break;
+
+ case R_PPC64_ADDR16_DS:
+ case R_PPC64_ADDR16_LO_DS:
+ case R_PPC64_GOT16_DS:
+ case R_PPC64_GOT16_LO_DS:
+ case R_PPC64_PLT16_LO_DS:
+ case R_PPC64_SECTOFF_DS:
+ case R_PPC64_SECTOFF_LO_DS:
+ case R_PPC64_TOC16_DS:
+ case R_PPC64_TOC16_LO_DS:
+ case R_PPC64_PLTGOT16_DS:
+ case R_PPC64_PLTGOT16_LO_DS:
+ if (((relocation + addend) & 3) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: error: relocation %s not a multiple of 4"),
+ bfd_archive_filename (input_bfd),
+ ppc64_elf_howto_table[(int) r_type]->name);
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ 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;
}
-#ifdef DEBUG
- fprintf (stderr, " type = %s (%d), name = %s, sym index = %ld, offset = %ld, addend = %ld\n",
- howto->name,
- (int) r_type,
- sym_name,
- r_symndx,
- (long) offset,
- (long) addend);
-#endif
+ /* 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
+ && !((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);
+ ret = false;
+ }
- r = _bfd_final_link_relocate (howto,
+ r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
input_bfd,
input_section,
contents,
relocation,
addend);
- if (r == bfd_reloc_ok)
- ;
- else if (r == bfd_reloc_overflow)
+ if (r != bfd_reloc_ok)
{
const char *name;
if (h != NULL)
{
if (h->root.type == bfd_link_hash_undefweak
- && howto->pc_relative)
+ && ppc64_elf_howto_table[(int) r_type]->pc_relative)
{
/* Assume this is a call protected by other code that
detects the symbol is undefined. If this is the case,
name = bfd_section_name (input_bfd, sec);
}
- if (! (*info->callbacks->reloc_overflow) (info,
- name,
- howto->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;
}
-#ifdef DEBUG
- fprintf (stderr, "\n");
-#endif
-
return ret;
}
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
{
+ struct ppc_link_hash_table *htab;
bfd *dynobj;
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_finish_dynamic_symbol called for %s",
- h->root.root.string);
-#endif
-
- dynobj = elf_hash_table (info)->dynobj;
- BFD_ASSERT (dynobj != NULL);
+ 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)
{
- asection *splt, *srela, *sglink;
Elf_Internal_Rela rela;
- bfd_vma reloc_index, plt_offset;
- struct elf_link_hash_entry *funcdesc_h;
-
-#ifdef DEBUG
- fprintf (stderr, ", plt_offset = 0x%lx", (unsigned long) h->plt.offset);
-#endif
+ Elf64_External_Rela *loc;
/* This symbol has an entry in the procedure linkage table. Set
- it up. */
-
- BFD_ASSERT (h->dynindx != -1);
-
- splt = bfd_get_section_by_name (dynobj, ".plt");
- srela = bfd_get_section_by_name (dynobj, ".rela.plt");
- BFD_ASSERT (splt != NULL && srela != NULL);
-
- /* We don't need to fill in the .plt. The dynamic linker will
- fill it in. */
-
- /* We may need to create a linkage function. */
- sglink = bfd_get_section_by_name (dynobj, ".glink");
- if (sglink != NULL && h->root.u.def.section == sglink)
- {
- bfd_byte *p;
- bfd_vma pltoff;
- const unsigned int *stub;
-
- /* Where to write it. */
- p = h->root.u.def.section->contents + h->root.u.def.value;
+ it up. */
- /* The function descriptor is in the PLT. */
- pltoff = splt->output_section->vma
- + splt->output_section->output_offset
- + h->plt.offset
- - elf_gp (output_bfd) - TOC_BASE_OFF;
+ if (htab->splt == NULL
+ || htab->srelplt == NULL
+ || htab->sglink == NULL)
+ abort ();
- if (pltoff + 0x8000 > 0xffff)
- {
- (*_bfd_error_handler)
- (_("linkage table overflow against `%s'"),
- h->root.root.string);
- }
-
- /* Write it out. */
- stub = ppc64_elf_glink_code;
- bfd_put_32 (output_bfd, *stub | (pltoff & 0xfffc), p);
- while (p += 4, ++stub < (ppc64_elf_glink_code
- + (sizeof (ppc64_elf_glink_code)
- / sizeof (*ppc64_elf_glink_code))));
- {
- bfd_put_32 (output_bfd, *stub, p);
- }
-#ifdef DEBUG
- fprintf (stderr, ", linkage function");
-#endif
- }
+ /* Create a JMP_SLOT reloc to inform the dynamic linker to
+ fill in the PLT entry. */
- /* Create a JMP_SLOT reloc to inform the dynamic linker to fix
- the PLT entry. */
-
- /* Save the PLT offset, since `h' may be changed below. */
- plt_offset = h->plt.offset;
-
- /* If it's a function entry point, find its corresponding
- function descriptor. ppc64_elf_adjust_dynamic_symbol have
- already set it up for us. */
-
- /* FIXME: Is it safe to assume that this symbol is a function? */
- BFD_ASSERT (h->root.root.string[0] == '.');
-
- /* FIXME: Follow bfd_link_hash_indirect? */
- funcdesc_h = elf_link_hash_lookup (elf_hash_table (info),
- h->root.root.string + 1,
- false, false, false);
- BFD_ASSERT (funcdesc_h != NULL);
- BFD_ASSERT (funcdesc_h->dynindx != -1);
-
- /* FIXME: Rename the symbol for the function entry point to
- `linkage_for_FUNC'? */
-
- rela.r_offset = (splt->output_section->vma
- + splt->output_offset
- + plt_offset);
- rela.r_info = ELF64_R_INFO (funcdesc_h->dynindx, R_PPC64_JMP_SLOT);
+ rela.r_offset = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + h->plt.offset);
+ rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
rela.r_addend = 0;
- reloc_index = (plt_offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
- bfd_elf64_swap_reloca_out (output_bfd, &rela,
- ((Elf64_External_Rela *) srela->contents
- + reloc_index));
-#ifdef DEBUG
- fprintf (stderr, ", JMP_SLOT for %s", funcdesc_h->root.root.string);
-#endif
-
-#if 0
- /* FIXME: Really do this? */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- }
-#endif
+ loc = (Elf64_External_Rela *) htab->srelplt->contents;
+ loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
+ bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
if (h->got.offset != (bfd_vma) -1)
{
- asection *sgot;
- asection *srela;
Elf_Internal_Rela rela;
-
-#ifdef DEBUG
- fprintf (stderr, ", got.offset = %08lx", (unsigned long) h->got.offset);
-#endif
+ Elf64_External_Rela *loc;
/* This symbol has an entry in the global offset table. Set it
- up. */
+ up. */
- sgot = bfd_get_section_by_name (dynobj, ".got");
- srela = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (sgot != NULL && srela != NULL);
+ if (htab->sgot == NULL || htab->srelgot == NULL)
+ abort ();
- rela.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + (h->got.offset &~ 1));
+ rela.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ + (h->got.offset &~ (bfd_vma) 1));
- /* If this is a -Bsymbolic link, and the symbol is defined
- locally, we just want to emit a RELATIVE reloc. The entry in
- the global offset table will already have been initialized in
- the relocate_section function. */
+ /* If this is a static link, or it is a -Bsymbolic link and the
+ symbol is defined locally or was forced to be local because
+ of a version file, we just want to emit a RELATIVE reloc.
+ The entry in the global offset table will already have been
+ initialized in the relocate_section function. */
if (info->shared
- && (info->symbolic || h->dynindx == -1)
+ && (info->symbolic
+ || h->dynindx == -1
+ || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
{
+ BFD_ASSERT((h->got.offset & 1) != 0);
rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
rela.r_addend = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
else
{
BFD_ASSERT ((h->got.offset & 1) == 0);
- bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
+ bfd_put_64 (output_bfd, (bfd_vma) 0,
+ htab->sgot->contents + h->got.offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
rela.r_addend = 0;
}
- bfd_elf64_swap_reloca_out (output_bfd, &rela,
- ((Elf64_External_Rela *) srela->contents
- + srela->reloc_count));
- ++srela->reloc_count;
+ loc = (Elf64_External_Rela *) htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++;
+ bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
{
- asection *s;
Elf_Internal_Rela rela;
+ Elf64_External_Rela *loc;
- /* This symbols needs a copy reloc. Set it up. */
-
-#ifdef DEBUG
- fprintf (stderr, ", copy");
-#endif
-
- BFD_ASSERT (h->dynindx != -1);
+ /* This symbol needs a copy reloc. Set it up. */
- s = bfd_get_section_by_name (h->root.u.def.section->owner,
- ".rela.bss");
- BFD_ASSERT (s != NULL);
+ if (h->dynindx == -1
+ || (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ || htab->srelbss == NULL)
+ abort ();
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
rela.r_addend = 0;
- bfd_elf64_swap_reloca_out (output_bfd, &rela,
- ((Elf64_External_Rela *) s->contents
- + s->reloc_count));
- ++s->reloc_count;
+ loc = (Elf64_External_Rela *) htab->srelbss->contents;
+ loc += htab->srelbss->reloc_count++;
+ bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
-#ifdef DEBUG
- fprintf (stderr, "\n");
-#endif
-
/* Mark some specially defined symbols as absolute. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
sym->st_shndx = SHN_ABS;
return true;
}
+/* Used to decide how to sort relocs in an optimal manner for the
+ dynamic linker, before writing them out. */
+
+static enum elf_reloc_type_class
+ppc64_elf_reloc_type_class (rela)
+ const Elf_Internal_Rela *rela;
+{
+ enum elf_ppc_reloc_type r_type;
+
+ r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
+ switch (r_type)
+ {
+ case R_PPC64_RELATIVE:
+ return reloc_class_relative;
+ case R_PPC64_JMP_SLOT:
+ return reloc_class_plt;
+ case R_PPC64_COPY:
+ return reloc_class_copy;
+ default:
+ return reloc_class_normal;
+ }
+}
+
/* Finish up the dynamic sections. */
static boolean
bfd *output_bfd;
struct bfd_link_info *info;
{
+ struct ppc_link_hash_table *htab;
+ bfd *dynobj;
asection *sdyn;
- bfd *dynobj = elf_hash_table (info)->dynobj;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc64_elf_finish_dynamic_sections called\n");
-#endif
+ htab = ppc_hash_table (info);
+ dynobj = htab->elf.dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
- if (elf_hash_table (info)->dynamic_sections_created)
+ if (htab->elf.dynamic_sections_created)
{
- asection *splt;
Elf64_External_Dyn *dyncon, *dynconend;
- splt = bfd_get_section_by_name (dynobj, ".plt");
- BFD_ASSERT (splt != NULL && sdyn != NULL);
+ if (sdyn == NULL || htab->sgot == NULL)
+ abort ();
dyncon = (Elf64_External_Dyn *) sdyn->contents;
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
- const char *name;
- boolean size;
+ asection *s;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
- case DT_PLTGOT: name = ".plt"; size = false; break;
- case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
- case DT_JMPREL: name = ".rela.plt"; size = false; break;
- default: name = NULL; size = false; break;
- }
-
- if (name != NULL)
- {
- asection *s;
-
- s = bfd_get_section_by_name (output_bfd, name);
- if (s == NULL)
- dyn.d_un.d_val = 0;
- else
- {
- if (! size)
- dyn.d_un.d_ptr = s->vma;
- else
- {
- if (s->_cooked_size != 0)
- dyn.d_un.d_val = s->_cooked_size;
- else
- dyn.d_un.d_val = s->_raw_size;
- }
- }
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- }
- }
- }
-
- if (info->shared)
- {
- asection *sdynsym;
- asection *s;
- Elf_Internal_Sym sym;
- int maxdindx = 0;
-
- /* Set up the section symbols for the output sections. */
-
- sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
- BFD_ASSERT (sdynsym != NULL);
+ default:
+ continue;
- sym.st_size = 0;
- sym.st_name = 0;
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- sym.st_other = 0;
+ case DT_PPC64_GLINK:
+ dyn.d_un.d_ptr = (htab->sglink->output_section->vma
+ + htab->sglink->output_offset);
+ break;
- for (s = output_bfd->sections; s != NULL; s = s->next)
- {
- int indx, dindx;
+ case DT_PPC64_OPD:
+ s = bfd_get_section_by_name (output_bfd, ".opd");
+ if (s != NULL)
+ dyn.d_un.d_ptr = s->vma;
+ break;
- sym.st_value = s->vma;
+ 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;
- indx = elf_section_data (s)->this_idx;
- dindx = elf_section_data (s)->dynindx;
- if (dindx != -1)
- {
- BFD_ASSERT (indx > 0);
- BFD_ASSERT (dindx > 0);
+ case DT_PLTGOT:
+ dyn.d_un.d_ptr = (htab->splt->output_section->vma
+ + htab->splt->output_offset);
+ break;
- if (dindx > maxdindx)
- maxdindx = dindx;
+ case DT_JMPREL:
+ dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
+ + htab->srelplt->output_offset);
+ break;
- sym.st_shndx = indx;
+ case DT_PLTRELSZ:
+ dyn.d_un.d_val = htab->srelplt->_raw_size;
+ break;
- bfd_elf64_swap_symbol_out (output_bfd, &sym,
- (PTR) (((Elf64_External_Sym *)
- sdynsym->contents)
- + dindx));
+ case DT_RELASZ:
+ /* Don't count procedure linkage table relocs in the
+ overall reloc count. */
+ if (htab->srelplt != NULL)
+ dyn.d_un.d_val -= htab->srelplt->_raw_size;
+ break;
}
+
+ bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
}
+ }
- /* Set the sh_info field of the output .dynsym section to the
- index of the first global symbol. */
- elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
- maxdindx + 1;
+ if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
+ {
+ /* Fill in the first entry in the global offset table.
+ We use it to hold the link-time TOCbase. */
+ bfd_put_64 (output_bfd,
+ elf_gp (output_bfd) + TOC_BASE_OFF,
+ htab->sgot->contents);
+
+ /* Set .got entry size. */
+ elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
+ }
+
+ if (htab->splt != NULL && htab->splt->_raw_size != 0)
+ {
+ /* Set .plt entry size. */
+ elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
+ = PLT_ENTRY_SIZE;
}
return true;
#define elf_backend_plt_alignment 3
#define elf_backend_plt_not_loaded 1
#define elf_backend_got_symbol_offset 0
-#define elf_backend_got_header_size 0
-#define elf_backend_can_gc_sections 1
-
+#define elf_backend_got_header_size 8
#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
-
-#define bfd_elf64_bfd_copy_private_bfd_data ppc64_elf_copy_private_bfd_data
-#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
-#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_final_link ppc64_elf_final_link
-
-#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
-#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
-#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
-#define elf_backend_relocate_section ppc64_elf_relocate_section
-#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
-#define elf_backend_check_relocs ppc64_elf_check_relocs
-#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
-#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
-#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
-#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
-#define elf_backend_fake_sections ppc64_elf_fake_sections
+#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_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_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_gc_mark_hook ppc64_elf_gc_mark_hook
+#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
+#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
+#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_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
+#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
#include "elf64-target.h"
projects / deliverable / binutils-gdb.git / blobdiff