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- /* 32-bit ELF support for TI PRU.
- Copyright (C) 2014-2022 Free Software Foundation, Inc.
- Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
- Based on elf32-nios2.c
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- /* This file handles TI PRU ELF targets. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- #include "bfdlink.h"
- #include "genlink.h"
- #include "elf-bfd.h"
- #include "elf/pru.h"
- #include "opcode/pru.h"
- #include "libiberty.h"
- /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
- #define OCTETS_PER_BYTE(ABFD, SEC) 1
- #define SWAP_VALS(A,B) \
- do { \
- (A) ^= (B); \
- (B) ^= (A); \
- (A) ^= (B); \
- } while (0)
- /* Enable debugging printout at stdout with this variable. */
- static bool debug_relax = false;
- /* Forward declarations. */
- static bfd_reloc_status_type pru_elf32_pmem_relocate
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type pru_elf32_s10_pcrel_relocate
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type pru_elf32_u8_pcrel_relocate
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type pru_elf32_ldi32_relocate
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type bfd_elf_pru_diff_relocate
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- /* Target vector. */
- extern const bfd_target pru_elf32_vec;
- /* The relocation table used for SHT_REL sections. */
- static reloc_howto_type elf_pru_howto_table_rel[] = {
- /* No relocation. */
- HOWTO (R_PRU_NONE, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 3, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_PRU_NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_PRU_16_PMEM,
- 2,
- 1, /* short */
- 32,
- false,
- 0,
- complain_overflow_dont,
- bfd_elf_generic_reloc,
- "R_PRU_16_PMEM",
- false,
- 0, /* src_mask */
- 0xffff,
- false),
- HOWTO (R_PRU_U16_PMEMIMM,
- 2,
- 2,
- 32,
- false,
- 8,
- complain_overflow_unsigned,
- pru_elf32_pmem_relocate,
- "R_PRU_U16_PMEMIMM",
- false,
- 0, /* src_mask */
- 0x00ffff00,
- false),
- HOWTO (R_PRU_BFD_RELOC_16,
- 0,
- 1, /* short */
- 16,
- false,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_PRU_BFD_RELOC16",
- false,
- 0, /* src_mask */
- 0x0000ffff,
- false),
- /* 16-bit unsigned immediate relocation. */
- HOWTO (R_PRU_U16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 8, /* bitpos */
- complain_overflow_unsigned, /* complain on overflow */
- bfd_elf_generic_reloc, /* special function */
- "R_PRU_U16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x00ffff00, /* dest_mask */
- false), /* pcrel_offset */
- HOWTO (R_PRU_32_PMEM,
- 2,
- 2, /* long */
- 32,
- false,
- 0,
- complain_overflow_dont,
- pru_elf32_pmem_relocate,
- "R_PRU_32_PMEM",
- false,
- 0, /* src_mask */
- 0xffffffff,
- false),
- HOWTO (R_PRU_BFD_RELOC_32,
- 0,
- 2, /* long */
- 32,
- false,
- 0,
- complain_overflow_dont,
- bfd_elf_generic_reloc,
- "R_PRU_BFD_RELOC32",
- false,
- 0, /* src_mask */
- 0xffffffff,
- false),
- HOWTO (R_PRU_S10_PCREL,
- 2,
- 2,
- 10,
- true,
- 0,
- complain_overflow_bitfield,
- pru_elf32_s10_pcrel_relocate,
- "R_PRU_S10_PCREL",
- false,
- 0, /* src_mask */
- 0x060000ff,
- true),
- HOWTO (R_PRU_U8_PCREL,
- 2,
- 2,
- 8,
- true,
- 0,
- complain_overflow_unsigned,
- pru_elf32_u8_pcrel_relocate,
- "R_PRU_U8_PCREL",
- false,
- 0, /* src_mask */
- 0x000000ff,
- true),
- HOWTO (R_PRU_LDI32,
- 0, /* rightshift */
- 4, /* size (4 = 8bytes) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_unsigned, /* complain on overflow */
- pru_elf32_ldi32_relocate, /* special function */
- "R_PRU_LDI32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dest_mask */
- false), /* pcrel_offset */
- /* GNU-specific relocations. */
- HOWTO (R_PRU_GNU_BFD_RELOC_8,
- 0,
- 0, /* byte */
- 8,
- false,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_PRU_BFD_RELOC8",
- false,
- 0, /* src_mask */
- 0x000000ff,
- false),
- HOWTO (R_PRU_GNU_DIFF8, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_pru_diff_relocate, /* special_function */
- "R_PRU_DIFF8", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_PRU_GNU_DIFF16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_pru_diff_relocate,/* special_function */
- "R_PRU_DIFF16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_PRU_GNU_DIFF32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_pru_diff_relocate,/* special_function */
- "R_PRU_DIFF32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_PRU_GNU_DIFF16_PMEM, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_pru_diff_relocate,/* special_function */
- "R_PRU_DIFF16_PMEM", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_PRU_GNU_DIFF32_PMEM, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_pru_diff_relocate,/* special_function */
- "R_PRU_DIFF32_PMEM", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* Add other relocations here. */
- };
- static unsigned char elf_code_to_howto_index[R_PRU_ILLEGAL + 1];
- /* Return the howto for relocation RTYPE. */
- static reloc_howto_type *
- lookup_howto (unsigned int rtype)
- {
- static bool initialized = false;
- int i;
- int howto_tbl_size = (int) (sizeof (elf_pru_howto_table_rel)
- / sizeof (elf_pru_howto_table_rel[0]));
- if (! initialized)
- {
- initialized = true;
- memset (elf_code_to_howto_index, 0xff,
- sizeof (elf_code_to_howto_index));
- for (i = 0; i < howto_tbl_size; i++)
- elf_code_to_howto_index[elf_pru_howto_table_rel[i].type] = i;
- }
- if (rtype > R_PRU_ILLEGAL)
- return NULL;
- i = elf_code_to_howto_index[rtype];
- if (i >= howto_tbl_size)
- return NULL;
- return elf_pru_howto_table_rel + i;
- }
- /* Map for converting BFD reloc types to PRU reloc types. */
- struct elf_reloc_map
- {
- bfd_reloc_code_real_type bfd_val;
- enum elf_pru_reloc_type elf_val;
- };
- static const struct elf_reloc_map pru_reloc_map[] =
- {
- {BFD_RELOC_NONE, R_PRU_NONE},
- {BFD_RELOC_PRU_16_PMEM, R_PRU_16_PMEM},
- {BFD_RELOC_PRU_U16_PMEMIMM, R_PRU_U16_PMEMIMM},
- {BFD_RELOC_16, R_PRU_BFD_RELOC_16},
- {BFD_RELOC_PRU_U16, R_PRU_U16},
- {BFD_RELOC_PRU_32_PMEM, R_PRU_32_PMEM},
- {BFD_RELOC_32, R_PRU_BFD_RELOC_32},
- {BFD_RELOC_PRU_S10_PCREL, R_PRU_S10_PCREL},
- {BFD_RELOC_PRU_U8_PCREL, R_PRU_U8_PCREL},
- {BFD_RELOC_PRU_LDI32, R_PRU_LDI32},
- {BFD_RELOC_8, R_PRU_GNU_BFD_RELOC_8},
- {BFD_RELOC_PRU_GNU_DIFF8, R_PRU_GNU_DIFF8},
- {BFD_RELOC_PRU_GNU_DIFF16, R_PRU_GNU_DIFF16},
- {BFD_RELOC_PRU_GNU_DIFF32, R_PRU_GNU_DIFF32},
- {BFD_RELOC_PRU_GNU_DIFF16_PMEM, R_PRU_GNU_DIFF16_PMEM},
- {BFD_RELOC_PRU_GNU_DIFF32_PMEM, R_PRU_GNU_DIFF32_PMEM},
- };
- /* Assorted hash table functions. */
- /* Create an entry in a PRU ELF linker hash table. */
- static struct bfd_hash_entry *
- link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table, const char *string)
- {
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
- {
- entry = bfd_hash_allocate (table,
- sizeof (struct elf_link_hash_entry));
- if (entry == NULL)
- return entry;
- }
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- return entry;
- }
- /* Implement bfd_elf32_bfd_reloc_type_lookup:
- Given a BFD reloc type, return a howto structure. */
- static reloc_howto_type *
- pru_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
- {
- unsigned int i;
- for (i = 0; i < ARRAY_SIZE (pru_reloc_map); ++i)
- if (pru_reloc_map[i].bfd_val == code)
- return lookup_howto ((unsigned int) pru_reloc_map[i].elf_val);
- return NULL;
- }
- /* Implement bfd_elf32_bfd_reloc_name_lookup:
- Given a reloc name, return a howto structure. */
- static reloc_howto_type *
- pru_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0; i < ARRAY_SIZE (elf_pru_howto_table_rel); i++)
- if (elf_pru_howto_table_rel[i].name
- && strcasecmp (elf_pru_howto_table_rel[i].name, r_name) == 0)
- return &elf_pru_howto_table_rel[i];
- return NULL;
- }
- /* Implement elf_info_to_howto:
- Given a ELF32 relocation, fill in a arelent structure. */
- static bool
- pru_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr,
- Elf_Internal_Rela *dst)
- {
- unsigned int r_type;
- r_type = ELF32_R_TYPE (dst->r_info);
- if (r_type >= R_PRU_ILLEGAL)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- cache_ptr->howto = lookup_howto (r_type);
- return cache_ptr->howto != NULL;
- }
- /* Do the relocations that require special handling. */
- /* Produce a word address for program memory. Linker scripts will put .text
- at a high offset in order to differentiate it from .data. So here we also
- mask the high bits of PMEM address.
- But why 1MB when internal Program Memory much smaller? We want to catch
- unintended overflows.
- Why not use (1<<31) as an offset and a mask? Sitara DDRAM usually resides
- there, and users might want to put some shared carveout memory region in
- their linker scripts. So 0x80000000 might be a valid .data address.
- Note that we still keep and pass down the original howto. This way we
- can reuse this function for several different relocations. */
- static bfd_reloc_status_type
- pru_elf32_do_pmem_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section,
- bfd_byte *data, bfd_vma offset,
- bfd_vma symbol_value, bfd_vma addend)
- {
- symbol_value = symbol_value + addend;
- addend = 0;
- symbol_value &= 0x3fffff;
- return _bfd_final_link_relocate (howto, abfd, input_section,
- data, offset, symbol_value, addend);
- }
- /* Direct copy of _bfd_final_link_relocate, but with special
- "fill-in". This copy-paste mumbo jumbo is only needed because BFD
- cannot deal correctly with non-contiguous bit fields. */
- static bfd_reloc_status_type
- pru_elf32_do_s10_pcrel_relocate (bfd *input_bfd, reloc_howto_type *howto,
- asection *input_section,
- bfd_byte *contents, bfd_vma address,
- bfd_vma relocation, bfd_vma addend)
- {
- bfd_byte *location;
- bfd_vma x = 0;
- bfd_vma qboff;
- bfd_reloc_status_type flag = bfd_reloc_ok;
- /* Sanity check the address. */
- if (address > bfd_get_section_limit (input_bfd, input_section))
- return bfd_reloc_outofrange;
- BFD_ASSERT (howto->pc_relative);
- BFD_ASSERT (howto->pcrel_offset);
- relocation = relocation + addend - (input_section->output_section->vma
- + input_section->output_offset) - address;
- location = contents + address;
- /* Get the value we are going to relocate. */
- BFD_ASSERT (bfd_get_reloc_size (howto) == 4);
- x = bfd_get_32 (input_bfd, location);
- qboff = GET_BROFF_SIGNED (x) << howto->rightshift;
- relocation += qboff;
- BFD_ASSERT (howto->complain_on_overflow == complain_overflow_bitfield);
- if (relocation > 2047 && relocation < (bfd_vma)-2048l)
- flag = bfd_reloc_overflow;
- /* Check that target address is word-aligned. */
- if (relocation & ((1 << howto->rightshift) - 1))
- flag = bfd_reloc_outofrange;
- relocation >>= (bfd_vma) howto->rightshift;
- /* Fill-in the RELOCATION to the right bits of X. */
- SET_BROFF_URAW (x, relocation);
- bfd_put_32 (input_bfd, x, location);
- return flag;
- }
- static bfd_reloc_status_type
- pru_elf32_do_u8_pcrel_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section,
- bfd_byte *data, bfd_vma offset,
- bfd_vma symbol_value, bfd_vma addend)
- {
- bfd_vma relocation;
- BFD_ASSERT (howto->pc_relative);
- BFD_ASSERT (howto->pcrel_offset);
- relocation = symbol_value + addend - (input_section->output_section->vma
- + input_section->output_offset) - offset;
- relocation >>= howto->rightshift;
- /* 0 and 1 are invalid target labels for LOOP. We cannot
- encode this info in HOWTO, so catch such cases here. */
- if (relocation < 2)
- return bfd_reloc_outofrange;
- return _bfd_final_link_relocate (howto, abfd, input_section,
- data, offset, symbol_value, addend);
- }
- /* Idea and code taken from elf32-d30v. */
- static bfd_reloc_status_type
- pru_elf32_do_ldi32_relocate (bfd *abfd, reloc_howto_type *howto,
- asection *input_section,
- bfd_byte *data, bfd_vma offset,
- bfd_vma symbol_value, bfd_vma addend)
- {
- bfd_vma relocation;
- bfd_size_type octets = offset * OCTETS_PER_BYTE (abfd, input_section);
- bfd_byte *location;
- unsigned long in1, in2;
- /* A hacked-up version of _bfd_final_link_relocate() follows. */
- /* Sanity check the address. */
- if (octets + bfd_get_reloc_size (howto)
- > bfd_get_section_limit_octets (abfd, input_section))
- return bfd_reloc_outofrange;
- /* This function assumes that we are dealing with a basic relocation
- against a symbol. We want to compute the value of the symbol to
- relocate to. This is just VALUE, the value of the symbol, plus
- ADDEND, any addend associated with the reloc. */
- relocation = symbol_value + addend;
- BFD_ASSERT (!howto->pc_relative);
- /* A hacked-up version of _bfd_relocate_contents() follows. */
- location = data + octets;
- BFD_ASSERT (!howto->pc_relative);
- in1 = bfd_get_32 (abfd, location);
- in2 = bfd_get_32 (abfd, location + 4);
- SET_INSN_FIELD (IMM16, in1, relocation >> 16);
- SET_INSN_FIELD (IMM16, in2, relocation & 0xffff);
- bfd_put_32 (abfd, in1, location);
- bfd_put_32 (abfd, in2, location + 4);
- /* Old GAS and LD versions have a bug, where the two
- LDI instructions are swapped. Detect such object
- files and bail. */
- if (GET_INSN_FIELD (RDSEL, in1) != RSEL_31_16)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("error: %pB: old incompatible object file detected"),
- abfd);
- return bfd_reloc_notsupported;
- }
- return bfd_reloc_ok;
- }
- /* HOWTO handlers for relocations that require special handling. */
- static bfd_reloc_status_type
- pru_elf32_pmem_relocate (bfd *abfd, arelent *reloc_entry,
- asymbol *symbol, void *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);
- BFD_ASSERT (0);
- return pru_elf32_do_pmem_relocate (abfd, reloc_entry->howto,
- input_section,
- data, reloc_entry->address,
- (symbol->value
- + symbol->section->output_section->vma
- + symbol->section->output_offset),
- reloc_entry->addend);
- }
- static bfd_reloc_status_type
- pru_elf32_s10_pcrel_relocate (bfd *abfd, arelent *reloc_entry,
- asymbol *symbol, void *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);
- return pru_elf32_do_s10_pcrel_relocate (abfd, reloc_entry->howto,
- input_section, data,
- reloc_entry->address,
- (symbol->value
- + symbol->section->output_section->vma
- + symbol->section->output_offset),
- reloc_entry->addend);
- }
- static bfd_reloc_status_type
- pru_elf32_u8_pcrel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *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);
- return pru_elf32_do_u8_pcrel_relocate (abfd, reloc_entry->howto,
- input_section,
- data, reloc_entry->address,
- (symbol->value
- + symbol->section->output_section->vma
- + symbol->section->output_offset),
- reloc_entry->addend);
- }
- static bfd_reloc_status_type
- pru_elf32_ldi32_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *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);
- return pru_elf32_do_ldi32_relocate (abfd, reloc_entry->howto,
- input_section,
- data, reloc_entry->address,
- (symbol->value
- + symbol->section->output_section->vma
- + symbol->section->output_offset),
- reloc_entry->addend);
- }
- /* Implement elf_backend_relocate_section. */
- static int
- pru_elf32_relocate_section (bfd *output_bfd,
- struct bfd_link_info *info,
- bfd *input_bfd,
- asection *input_section,
- bfd_byte *contents,
- Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms,
- asection **local_sections)
- {
- struct bfd_elf_section_data * esd = elf_section_data (input_section);
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- bool is_rel_reloc;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (input_bfd);
- relend = relocs + input_section->reloc_count;
- /* See if we have a REL type relocation. */
- is_rel_reloc = (esd->rel.hdr != NULL);
- /* Sanity check - only one type of relocation per section.
- FIXME: Theoretically it is possible to have both types,
- but if that happens how can we distinguish between the two ? */
- BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr);
- for (rel = relocs; rel < relend; rel++)
- {
- reloc_howto_type *howto;
- unsigned long r_symndx;
- Elf_Internal_Sym *sym;
- asection *sec;
- struct elf_link_hash_entry *h;
- bfd_vma relocation;
- bfd_reloc_status_type r = bfd_reloc_ok;
- const char *name = NULL;
- const char* msg = (const char*) NULL;
- bool unresolved_reloc;
- bfd_vma addend;
- /* If we are using a REL relocation then the addend should be empty. */
- BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0);
- r_symndx = ELF32_R_SYM (rel->r_info);
- howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info));
- h = NULL;
- sym = NULL;
- sec = NULL;
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
- }
- else
- {
- bool warned, ignored;
- RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
- r_symndx, symtab_hdr, sym_hashes,
- h, sec, relocation,
- unresolved_reloc, warned, ignored);
- }
- if (sec && discarded_section (sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend, howto, 0, contents);
- /* Nothing more to do unless this is a final link. */
- if (bfd_link_relocatable (info))
- continue;
- if (howto)
- {
- switch (howto->type)
- {
- case R_PRU_NONE:
- /* We don't need to find a value for this symbol. It's just a
- marker. */
- r = bfd_reloc_ok;
- break;
- case R_PRU_U16:
- if (is_rel_reloc)
- {
- unsigned long insn;
- insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
- addend = GET_INSN_FIELD (IMM16, insn);
- }
- else
- addend = rel->r_addend;
- r = _bfd_final_link_relocate (howto, input_bfd,
- input_section, contents,
- rel->r_offset, relocation,
- addend);
- break;
- case R_PRU_U16_PMEMIMM:
- case R_PRU_32_PMEM:
- case R_PRU_16_PMEM:
- if (is_rel_reloc && howto->type == R_PRU_U16_PMEMIMM)
- {
- unsigned long insn;
- insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
- addend = GET_INSN_FIELD (IMM16, insn) << 2;
- }
- else if (is_rel_reloc && howto->type == R_PRU_32_PMEM)
- {
- addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
- addend <<= 2;
- }
- else if (is_rel_reloc && howto->type == R_PRU_16_PMEM)
- {
- addend = bfd_get_16 (input_bfd, contents + rel->r_offset);
- addend <<= 2;
- }
- else
- {
- BFD_ASSERT (!is_rel_reloc);
- addend = rel->r_addend;
- }
- r = pru_elf32_do_pmem_relocate (input_bfd, howto,
- input_section,
- contents, rel->r_offset,
- relocation, addend);
- break;
- case R_PRU_S10_PCREL:
- BFD_ASSERT (! is_rel_reloc);
- r = pru_elf32_do_s10_pcrel_relocate (input_bfd, howto,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- rel->r_addend);
- break;
- case R_PRU_U8_PCREL:
- BFD_ASSERT (! is_rel_reloc);
- r = pru_elf32_do_u8_pcrel_relocate (input_bfd, howto,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- rel->r_addend);
- break;
- case R_PRU_LDI32:
- if (is_rel_reloc)
- {
- unsigned long in1, in2;
- in1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
- in2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
- addend = (GET_INSN_FIELD (IMM16, in1) << 16)
- | GET_INSN_FIELD (IMM16, in2);
- }
- else
- {
- addend = rel->r_addend;
- }
- r = pru_elf32_do_ldi32_relocate (input_bfd, howto,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- addend);
- break;
- case R_PRU_GNU_DIFF8:
- case R_PRU_GNU_DIFF16:
- case R_PRU_GNU_DIFF32:
- case R_PRU_GNU_DIFF16_PMEM:
- case R_PRU_GNU_DIFF32_PMEM:
- /* GNU extensions support only rela. */
- BFD_ASSERT (! is_rel_reloc);
- /* Nothing to do here, as contents already contain the
- diff value. */
- r = bfd_reloc_ok;
- break;
- case R_PRU_BFD_RELOC_16:
- if (is_rel_reloc)
- addend = bfd_get_16 (input_bfd, contents + rel->r_offset);
- else
- addend = rel->r_addend;
- r = _bfd_final_link_relocate (howto, input_bfd,
- input_section, contents,
- rel->r_offset, relocation,
- addend);
- break;
- case R_PRU_BFD_RELOC_32:
- if (is_rel_reloc)
- addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
- else
- addend = rel->r_addend;
- r = _bfd_final_link_relocate (howto, input_bfd,
- input_section, contents,
- rel->r_offset, relocation,
- addend);
- break;
- case R_PRU_GNU_BFD_RELOC_8:
- BFD_ASSERT (! is_rel_reloc);
- r = _bfd_final_link_relocate (howto, input_bfd,
- input_section, contents,
- rel->r_offset, relocation,
- rel->r_addend);
- break;
- default:
- BFD_ASSERT (0);
- break;
- }
- }
- else
- r = bfd_reloc_notsupported;
- if (r != bfd_reloc_ok)
- {
- if (h != NULL)
- name = h->root.root.string;
- else
- {
- name = bfd_elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
- if (name == NULL || *name == '\0')
- name = bfd_section_name (sec);
- }
- switch (r)
- {
- case bfd_reloc_overflow:
- (*info->callbacks->reloc_overflow) (info, NULL, name,
- howto->name, (bfd_vma) 0,
- input_bfd, input_section,
- rel->r_offset);
- break;
- case bfd_reloc_undefined:
- (*info->callbacks->undefined_symbol) (info, name, input_bfd,
- input_section,
- rel->r_offset, true);
- break;
- case bfd_reloc_outofrange:
- if (msg == NULL)
- msg = _("relocation out of range");
- break;
- case bfd_reloc_notsupported:
- if (msg == NULL)
- msg = _("unsupported relocation");
- break;
- case bfd_reloc_dangerous:
- if (msg == NULL)
- msg = _("dangerous relocation");
- break;
- default:
- if (msg == NULL)
- msg = _("unknown error");
- break;
- }
- if (msg)
- {
- (*info->callbacks->warning) (info, msg, name, input_bfd,
- input_section, rel->r_offset);
- return false;
- }
- }
- }
- return true;
- }
- /* Perform a diff relocation. Nothing to do, as the difference value is
- already written into the section's contents. */
- static bfd_reloc_status_type
- bfd_elf_pru_diff_relocate (bfd *abfd ATTRIBUTE_UNUSED,
- arelent *reloc_entry ATTRIBUTE_UNUSED,
- asymbol *symbol ATTRIBUTE_UNUSED,
- void *data ATTRIBUTE_UNUSED,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd *output_bfd ATTRIBUTE_UNUSED,
- char **error_message ATTRIBUTE_UNUSED)
- {
- return bfd_reloc_ok;
- }
- /* Returns whether the relocation type passed is a diff reloc. */
- static bool
- elf32_pru_is_diff_reloc (Elf_Internal_Rela *irel)
- {
- return (ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF8
- || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF16
- || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF32
- || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF16_PMEM
- || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF32_PMEM);
- }
- /* Reduce the diff value written in the section by count if the shrinked
- insn address happens to fall between the two symbols for which this
- diff reloc was emitted. */
- static void
- elf32_pru_adjust_diff_reloc_value (bfd *abfd,
- struct bfd_section *isec,
- Elf_Internal_Rela *irel,
- bfd_vma symval,
- bfd_vma shrinked_insn_address,
- int count)
- {
- unsigned char *reloc_contents = NULL;
- unsigned char *isec_contents = elf_section_data (isec)->this_hdr.contents;
- if (isec_contents == NULL)
- {
- if (! bfd_malloc_and_get_section (abfd, isec, &isec_contents))
- return;
- elf_section_data (isec)->this_hdr.contents = isec_contents;
- }
- reloc_contents = isec_contents + irel->r_offset;
- /* Read value written in object file. */
- bfd_signed_vma x = 0;
- switch (ELF32_R_TYPE (irel->r_info))
- {
- case R_PRU_GNU_DIFF8:
- {
- x = bfd_get_signed_8 (abfd, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF16:
- {
- x = bfd_get_signed_16 (abfd, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF32:
- {
- x = bfd_get_signed_32 (abfd, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF16_PMEM:
- {
- x = bfd_get_signed_16 (abfd, reloc_contents) * 4;
- break;
- }
- case R_PRU_GNU_DIFF32_PMEM:
- {
- x = bfd_get_signed_32 (abfd, reloc_contents) * 4;
- break;
- }
- default:
- {
- BFD_FAIL ();
- }
- }
- /* For a diff reloc sym1 - sym2 the diff at assembly time (x) is written
- into the object file at the reloc offset. sym2's logical value is
- symval (<start_of_section>) + reloc addend. Compute the start and end
- addresses and check if the shrinked insn falls between sym1 and sym2. */
- bfd_vma end_address = symval + irel->r_addend;
- bfd_vma start_address = end_address - x;
- /* Shrink the absolute DIFF value (get the to labels "closer"
- together), because we have removed data between labels. */
- if (x < 0)
- {
- x += count;
- /* In case the signed x is negative, restore order. */
- SWAP_VALS (end_address, start_address);
- }
- else
- {
- x -= count;
- }
- /* Reduce the diff value by count bytes and write it back into section
- contents. */
- if (shrinked_insn_address >= start_address
- && shrinked_insn_address <= end_address)
- {
- switch (ELF32_R_TYPE (irel->r_info))
- {
- case R_PRU_GNU_DIFF8:
- {
- bfd_put_signed_8 (abfd, x & 0xFF, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF16:
- {
- bfd_put_signed_16 (abfd, x & 0xFFFF, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF32:
- {
- bfd_put_signed_32 (abfd, x & 0xFFFFFFFF, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF16_PMEM:
- {
- bfd_put_signed_16 (abfd, (x / 4) & 0xFFFF, reloc_contents);
- break;
- }
- case R_PRU_GNU_DIFF32_PMEM:
- {
- bfd_put_signed_32 (abfd, (x / 4) & 0xFFFFFFFF, reloc_contents);
- break;
- }
- default:
- {
- BFD_FAIL ();
- }
- }
- }
- }
- /* Delete some bytes from a section while changing the size of an instruction.
- The parameter "addr" denotes the section-relative offset pointing just
- behind the shrinked instruction. "addr+count" point at the first
- byte just behind the original unshrinked instruction.
- Idea copied from the AVR port. */
- static bool
- pru_elf_relax_delete_bytes (bfd *abfd,
- asection *sec,
- bfd_vma addr,
- int count)
- {
- Elf_Internal_Shdr *symtab_hdr;
- unsigned int sec_shndx;
- bfd_byte *contents;
- Elf_Internal_Rela *irel, *irelend;
- Elf_Internal_Sym *isym;
- Elf_Internal_Sym *isymbuf = NULL;
- bfd_vma toaddr;
- struct elf_link_hash_entry **sym_hashes;
- struct elf_link_hash_entry **end_hashes;
- unsigned int symcount;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
- contents = elf_section_data (sec)->this_hdr.contents;
- toaddr = sec->size;
- irel = elf_section_data (sec)->relocs;
- irelend = irel + sec->reloc_count;
- /* Actually delete the bytes. */
- if (toaddr - addr - count > 0)
- memmove (contents + addr, contents + addr + count,
- (size_t) (toaddr - addr - count));
- sec->size -= count;
- /* Adjust all the reloc addresses. */
- for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
- {
- bfd_vma old_reloc_address;
- old_reloc_address = (sec->output_section->vma
- + sec->output_offset + irel->r_offset);
- /* Get the new reloc address. */
- if ((irel->r_offset > addr
- && irel->r_offset < toaddr))
- {
- if (debug_relax)
- printf ("Relocation at address 0x%x needs to be moved.\n"
- "Old section offset: 0x%x, New section offset: 0x%x \n",
- (unsigned int) old_reloc_address,
- (unsigned int) irel->r_offset,
- (unsigned int) ((irel->r_offset) - count));
- irel->r_offset -= count;
- }
- }
- /* The reloc's own addresses are now ok. However, we need to readjust
- the reloc's addend, i.e. the reloc's value if two conditions are met:
- 1.) the reloc is relative to a symbol in this section that
- is located in front of the shrinked instruction
- 2.) symbol plus addend end up behind the shrinked instruction.
- The most common case where this happens are relocs relative to
- the section-start symbol.
- This step needs to be done for all of the sections of the bfd. */
- {
- struct bfd_section *isec;
- for (isec = abfd->sections; isec; isec = isec->next)
- {
- bfd_vma symval;
- bfd_vma shrinked_insn_address;
- if (isec->reloc_count == 0)
- continue;
- shrinked_insn_address = (sec->output_section->vma
- + sec->output_offset + addr);
- irel = elf_section_data (isec)->relocs;
- /* PR 12161: Read in the relocs for this section if necessary. */
- if (irel == NULL)
- irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, true);
- for (irelend = irel + isec->reloc_count;
- irel < irelend;
- irel++)
- {
- /* Read this BFD's local symbols if we haven't done
- so already. */
- if (isymbuf == NULL && symtab_hdr->sh_info != 0)
- {
- isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isymbuf == NULL)
- isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (isymbuf == NULL)
- return false;
- }
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- asection *sym_sec;
- isym = isymbuf + ELF32_R_SYM (irel->r_info);
- sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
- symval = isym->st_value;
- /* If the reloc is absolute, it will not have
- a symbol or section associated with it. */
- if (sym_sec == sec)
- {
- symval += sym_sec->output_section->vma
- + sym_sec->output_offset;
- if (debug_relax)
- printf ("Checking if the relocation's "
- "addend needs corrections.\n"
- "Address of anchor symbol: 0x%x \n"
- "Address of relocation target: 0x%x \n"
- "Address of relaxed insn: 0x%x \n",
- (unsigned int) symval,
- (unsigned int) (symval + irel->r_addend),
- (unsigned int) shrinked_insn_address);
- /* Shrink the special DIFF relocations. */
- if (elf32_pru_is_diff_reloc (irel))
- {
- elf32_pru_adjust_diff_reloc_value (abfd, isec, irel,
- symval,
- shrinked_insn_address,
- count);
- }
- /* Fix the addend, if it is affected. */
- if (symval <= shrinked_insn_address
- && (symval + irel->r_addend) > shrinked_insn_address)
- {
- irel->r_addend -= count;
- if (debug_relax)
- printf ("Relocation's addend needed to be fixed \n");
- }
- }
- /* else...Reference symbol is absolute.
- No adjustment needed. */
- }
- /* else...Reference symbol is extern. No need for adjusting
- the addend. */
- }
- }
- }
- /* Adjust the local symbols defined in this section. */
- isym = (Elf_Internal_Sym *) symtab_hdr->contents;
- /* Fix PR 9841, there may be no local symbols. */
- if (isym != NULL)
- {
- Elf_Internal_Sym *isymend;
- isymend = isym + symtab_hdr->sh_info;
- for (; isym < isymend; isym++)
- {
- if (isym->st_shndx == sec_shndx)
- {
- if (isym->st_value > addr
- && isym->st_value <= toaddr)
- isym->st_value -= count;
- if (isym->st_value <= addr
- && isym->st_value + isym->st_size > addr)
- {
- /* If this assert fires then we have a symbol that ends
- part way through an instruction. Does that make
- sense? */
- BFD_ASSERT (isym->st_value + isym->st_size >= addr + count);
- isym->st_size -= count;
- }
- }
- }
- }
- /* Now adjust the global symbols defined in this section. */
- symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- - symtab_hdr->sh_info);
- sym_hashes = elf_sym_hashes (abfd);
- end_hashes = sym_hashes + symcount;
- for (; sym_hashes < end_hashes; sym_hashes++)
- {
- struct elf_link_hash_entry *sym_hash = *sym_hashes;
- if ((sym_hash->root.type == bfd_link_hash_defined
- || sym_hash->root.type == bfd_link_hash_defweak)
- && sym_hash->root.u.def.section == sec)
- {
- if (sym_hash->root.u.def.value > addr
- && sym_hash->root.u.def.value <= toaddr)
- sym_hash->root.u.def.value -= count;
- if (sym_hash->root.u.def.value <= addr
- && (sym_hash->root.u.def.value + sym_hash->size > addr))
- {
- /* If this assert fires then we have a symbol that ends
- part way through an instruction. Does that make
- sense? */
- BFD_ASSERT (sym_hash->root.u.def.value + sym_hash->size
- >= addr + count);
- sym_hash->size -= count;
- }
- }
- }
- return true;
- }
- static bool
- pru_elf32_relax_section (bfd *abfd, asection *sec,
- struct bfd_link_info *link_info,
- bool *again)
- {
- Elf_Internal_Shdr * symtab_hdr;
- Elf_Internal_Rela * internal_relocs;
- Elf_Internal_Rela * irel;
- Elf_Internal_Rela * irelend;
- bfd_byte * contents = NULL;
- Elf_Internal_Sym * isymbuf = NULL;
- /* Assume nothing changes. */
- *again = false;
- /* We don't have to do anything for a relocatable link, if
- this section does not have relocs, or if this is not a
- code section. */
- if (bfd_link_relocatable (link_info)
- || (sec->flags & SEC_RELOC) == 0
- || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
- return true;
- symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
- /* Get a copy of the native relocations. */
- internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
- link_info->keep_memory);
- if (internal_relocs == NULL)
- goto error_return;
- /* Walk through them looking for relaxing opportunities. */
- irelend = internal_relocs + sec->reloc_count;
- for (irel = internal_relocs; irel < irelend; irel++)
- {
- bfd_vma symval;
- /* Get the section contents if we haven't done so already. */
- if (contents == NULL)
- {
- /* Get cached copy if it exists. */
- if (elf_section_data (sec)->this_hdr.contents != NULL)
- contents = elf_section_data (sec)->this_hdr.contents;
- else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
- goto error_return;
- }
- /* Read this BFD's local symbols if we haven't done so already. */
- if (isymbuf == NULL && symtab_hdr->sh_info != 0)
- {
- isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isymbuf == NULL)
- isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (isymbuf == NULL)
- goto error_return;
- }
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- Elf_Internal_Sym *isym;
- asection *sym_sec;
- isym = isymbuf + ELF32_R_SYM (irel->r_info);
- if (isym->st_shndx == SHN_UNDEF)
- sym_sec = bfd_und_section_ptr;
- else if (isym->st_shndx == SHN_ABS)
- sym_sec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- sym_sec = bfd_com_section_ptr;
- else
- sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
- symval = (isym->st_value
- + sym_sec->output_section->vma + sym_sec->output_offset);
- }
- else
- {
- unsigned long indx;
- struct elf_link_hash_entry *h;
- /* An external symbol. */
- indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
- h = elf_sym_hashes (abfd)[indx];
- BFD_ASSERT (h != NULL);
- if (h->root.type != bfd_link_hash_defined
- && h->root.type != bfd_link_hash_defweak)
- /* This appears to be a reference to an undefined
- symbol. Just ignore it--it will be caught by the
- regular reloc processing. */
- continue;
- symval = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- }
- /* For simplicity of coding, we are going to modify the section
- contents, the section relocs, and the BFD symbol table. We
- must tell the rest of the code not to free up this
- information. It would be possible to instead create a table
- of changes which have to be made, as is done in coff-mips.c;
- that would be more work, but would require less memory when
- the linker is run. */
- /* Check if we can remove an LDI instruction from the LDI32
- pseudo instruction if the upper 16 operand bits are zero. */
- if (ELF32_R_TYPE (irel->r_info) == (int) R_PRU_LDI32)
- {
- bfd_vma value = symval + irel->r_addend;
- if (debug_relax)
- printf ("R_PRU_LDI32 with value=0x%lx\n", (long) value);
- if ((long) value >> 16 == 0)
- {
- unsigned long insn;
- /* Note that we've changed the relocs, section contents. */
- elf_section_data (sec)->relocs = internal_relocs;
- elf_section_data (sec)->this_hdr.contents = contents;
- symtab_hdr->contents = (unsigned char *) isymbuf;
- /* Make the second instruction load the 16-bit constant
- into the full 32-bit register. */
- insn = bfd_get_32 (abfd, contents + irel->r_offset + 4);
- /* Old GAS and LD versions have a bug, where the two
- LDI instructions are swapped. Detect such object
- files and bail. */
- if (GET_INSN_FIELD (RDSEL, insn) != RSEL_15_0)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("error: %pB: old incompatible object file detected"),
- abfd);
- goto error_return;
- }
- SET_INSN_FIELD (RDSEL, insn, RSEL_31_0);
- bfd_put_32 (abfd, insn, contents + irel->r_offset + 4);
- /* Delete the first LDI instruction. Note that there should
- be no relocations or symbols pointing to the second LDI
- instruction. */
- if (!pru_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 4))
- goto error_return;
- /* We're done with deletion of the first instruction.
- Set a regular LDI relocation for the second instruction
- we left to load the 16-bit value into the 32-bit
- register. */
- irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
- R_PRU_U16);
- /* That will change things, so, we should relax again.
- Note that this is not required, and it may be slow. */
- *again = true;
- }
- }
- }
- if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
- {
- if (!link_info->keep_memory)
- free (isymbuf);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) isymbuf;
- }
- }
- if (contents != NULL
- && elf_section_data (sec)->this_hdr.contents != contents)
- {
- if (!link_info->keep_memory)
- free (contents);
- else
- {
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = contents;
- }
- }
- if (elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
- return true;
- error_return:
- if (symtab_hdr->contents != (unsigned char *) isymbuf)
- free (isymbuf);
- if (elf_section_data (sec)->this_hdr.contents != contents)
- free (contents);
- if (elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
- return false;
- }
- /* Free the derived linker hash table. */
- static void
- pru_elf32_link_hash_table_free (bfd *obfd)
- {
- _bfd_elf_link_hash_table_free (obfd);
- }
- /* Implement bfd_elf32_bfd_link_hash_table_create. */
- static struct bfd_link_hash_table *
- pru_elf32_link_hash_table_create (bfd *abfd)
- {
- struct elf_link_hash_table *ret;
- size_t amt = sizeof (struct elf_link_hash_table);
- ret = bfd_zmalloc (amt);
- if (ret == NULL)
- return NULL;
- if (!_bfd_elf_link_hash_table_init (ret, abfd,
- link_hash_newfunc,
- sizeof (struct
- elf_link_hash_entry),
- PRU_ELF_DATA))
- {
- free (ret);
- return NULL;
- }
- ret->root.hash_table_free = pru_elf32_link_hash_table_free;
- return &ret->root;
- }
- #define ELF_ARCH bfd_arch_pru
- #define ELF_TARGET_ID PRU_ELF_DATA
- #define ELF_MACHINE_CODE EM_TI_PRU
- #define ELF_MAXPAGESIZE 1
- #define bfd_elf32_bfd_link_hash_table_create \
- pru_elf32_link_hash_table_create
- /* Relocation table lookup macros. */
- #define bfd_elf32_bfd_reloc_type_lookup pru_elf32_bfd_reloc_type_lookup
- #define bfd_elf32_bfd_reloc_name_lookup pru_elf32_bfd_reloc_name_lookup
- #define elf_info_to_howto pru_elf32_info_to_howto
- #define elf_info_to_howto_rel NULL
- /* elf backend functions. */
- /* TI folks like to use a mix of REL and RELA relocations. See also
- the MSP430 and TI C6X backends. */
- #define elf_backend_may_use_rel_p 1
- #define elf_backend_may_use_rela_p 1
- #define elf_backend_default_use_rela_p 1
- #define elf_backend_rela_normal 1
- #define elf_backend_relocate_section pru_elf32_relocate_section
- #define bfd_elf32_bfd_relax_section pru_elf32_relax_section
- #define elf_backend_can_gc_sections 1
- #define TARGET_LITTLE_SYM pru_elf32_vec
- #define TARGET_LITTLE_NAME "elf32-pru"
- #include "elf32-target.h"
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