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[/] [or1k_old/] [tags/] [tn_m001/] [gdb-5.0/] [bfd/] [elf32-d30v.c] - Rev 861
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/* D30V-specific support for 32-bit ELF Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. Contributed by Martin Hunt (hunt@cygnus.com). 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "elf-bfd.h" static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); static void d30v_info_to_howto_rel PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); static void d30v_info_to_howto_rela PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); static bfd_reloc_status_type bfd_elf_d30v_reloc PARAMS (( bfd *abfd, arelent *reloc_entry, asymbol *symbol, PTR data, asection *input_section, bfd *output_bfd, char **error_message)); static bfd_reloc_status_type bfd_elf_d30v_reloc_21 PARAMS (( bfd *abfd, arelent *reloc_entry, asymbol *symbol, PTR data, asection *input_section, bfd *output_bfd, char **error_message)); enum reloc_type { R_D30V_NONE = 0, R_D30V_6, R_D30V_9_PCREL, R_D30V_9_PCREL_R, R_D30V_15, R_D30V_15_PCREL, R_D30V_15_PCREL_R, R_D30V_21, R_D30V_21_PCREL, R_D30V_21_PCREL_R, R_D30V_32, R_D30V_32_PCREL, R_D30V_32_NORMAL, R_D30V_max }; static reloc_howto_type elf_d30v_howto_table[] = { /* This reloc does nothing. */ HOWTO (R_D30V_NONE, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_D30V_NONE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* A 6 bit absolute relocation */ HOWTO (R_D30V_6, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 6, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_D30V_6", /* name */ false, /* partial_inplace */ 0x3f, /* src_mask */ 0x3f, /* dst_mask */ false), /* pcrel_offset */ /* A relative 9 bit relocation, right shifted by 3 */ HOWTO (R_D30V_9_PCREL, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 6, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc_21, /* special_function */ "R_D30V_9_PCREL", /* name */ false, /* partial_inplace */ 0x3f, /* src_mask */ 0x3f, /* dst_mask */ true), /* pcrel_offset */ /* A relative 9 bit relocation, right shifted by 3 */ HOWTO (R_D30V_9_PCREL_R, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 6, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc_21, /* special_function */ "R_D30V_9_PCREL_R", /* name */ false, /* partial_inplace */ 0x3f, /* src_mask */ 0x3f, /* dst_mask */ true), /* pcrel_offset */ /* An absolute 15 bit relocation, right shifted by 3 */ HOWTO (R_D30V_15, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 12, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_D30V_15", /* name */ false, /* partial_inplace */ 0xfff, /* src_mask */ 0xfff, /* dst_mask */ false), /* pcrel_offset */ /* A relative 15 bit relocation, right shifted by 3 */ HOWTO (R_D30V_15_PCREL, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 12, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc_21, /* special_function */ "R_D30V_15_PCREL", /* name */ false, /* partial_inplace */ 0xfff, /* src_mask */ 0xfff, /* dst_mask */ true), /* pcrel_offset */ /* A relative 15 bit relocation, right shifted by 3 */ HOWTO (R_D30V_15_PCREL_R, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 12, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc_21, /* special_function */ "R_D30V_15_PCREL_R", /* name */ false, /* partial_inplace */ 0xfff, /* src_mask */ 0xfff, /* dst_mask */ true), /* pcrel_offset */ /* An absolute 21 bit relocation, right shifted by 3 */ HOWTO (R_D30V_21, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 18, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_D30V_21", /* name */ false, /* partial_inplace */ 0x3ffff, /* src_mask */ 0x3ffff, /* dst_mask */ false), /* pcrel_offset */ /* A relative 21 bit relocation, right shifted by 3 */ HOWTO (R_D30V_21_PCREL, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 18, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc_21, /* special_function */ "R_D30V_21_PCREL", /* name */ false, /* partial_inplace */ 0x3ffff, /* src_mask */ 0x3ffff, /* dst_mask */ true), /* pcrel_offset */ /* A relative 21 bit relocation, right shifted by 3, in the Right container */ HOWTO (R_D30V_21_PCREL_R, /* type */ 3, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 18, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc_21, /* special_function */ "R_D30V_21_PCREL_R", /* name */ false, /* partial_inplace */ 0x3ffff, /* src_mask */ 0x3ffff, /* dst_mask */ true), /* pcrel_offset */ /* A D30V 32 bit absolute relocation */ HOWTO (R_D30V_32, /* type */ 0, /* rightshift */ 4, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_d30v_reloc, /* special_function */ "R_D30V_32", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* A relative 32 bit relocation */ HOWTO (R_D30V_32_PCREL, /* type */ 0, /* rightshift */ 4, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_d30v_reloc, /* special_function */ "R_D30V_32_PCREL", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ true), /* pcrel_offset */ /* A regular 32 bit absolute relocation */ HOWTO (R_D30V_32_NORMAL, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_D30V_32_NORMAL", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ }; #define MIN32 (long long)0xffffffff80000000LL #define MAX32 0x7fffffffLL static bfd_reloc_status_type bfd_elf_d30v_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 long relocation; bfd_vma in1, in2, num; bfd_vma tmp_addr = 0; bfd_reloc_status_type r; asection *reloc_target_output_section; bfd_size_type addr = reloc_entry->address; bfd_reloc_status_type flag = bfd_reloc_ok; bfd_vma output_base = 0; reloc_howto_type *howto = reloc_entry->howto; int make_absolute = 0; r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message); if (r != bfd_reloc_continue) return r; /* a hacked-up version of bfd_perform_reloc() follows */ if (bfd_is_und_section (symbol->section) && (symbol->flags & BSF_WEAK) == 0 && output_bfd == (bfd *) NULL) flag = bfd_reloc_undefined; /* Is the address of the relocation really within the section? */ if (reloc_entry->address > input_section->_cooked_size) return bfd_reloc_outofrange; /* Work out which section the relocation is targetted at and the initial relocation command value. */ /* Get symbol value. (Common symbols are special.) */ if (bfd_is_com_section (symbol->section)) relocation = 0; else relocation = symbol->value; reloc_target_output_section = symbol->section->output_section; /* Convert input-section-relative symbol value to absolute. */ if (output_bfd) output_base = 0; else output_base = reloc_target_output_section->vma; relocation += output_base + symbol->section->output_offset; /* Add in supplied addend. */ relocation += reloc_entry->addend; /* Here the variable relocation holds the final address of the symbol we are relocating against, plus any addend. */ if (howto->pc_relative == true) { tmp_addr = input_section->output_section->vma + input_section->output_offset + reloc_entry->address; relocation -= tmp_addr; } if (output_bfd != (bfd *) NULL) { /* This is a partial relocation, and we want to apply the relocation to the reloc entry rather than the raw data. Modify the reloc inplace to reflect what we now know. */ reloc_entry->addend = relocation; reloc_entry->address += input_section->output_offset; return flag; } else reloc_entry->addend = 0; in1 = bfd_get_32 (abfd, (bfd_byte *) data + addr); in2 = bfd_get_32 (abfd, (bfd_byte *) data + addr + 4); /* extract the addend */ num = ((in2 & 0x3FFFF) | ((in2 & 0xFF00000) >> 2) | ((in1 & 0x3F) << 26)); in1 &= 0xFFFFFFC0; in2 = 0x80000000; relocation += num; if (howto->pc_relative == true && howto->bitsize == 32) { /* the D30V has a PC that doesn't wrap and PC-relative jumps */ /* are signed, so a PC-relative jump can'tbe more than +/- 2^31 byrtes */ /* if one exceeds this, change it to an absolute jump */ if (relocation > MAX32) { relocation = (relocation + tmp_addr) & 0xffffffff; make_absolute = 1; } else if (relocation < MIN32) { relocation = (relocation + tmp_addr) & 0xffffffff; make_absolute = 1; } } in1 |= (relocation >> 26) & 0x3F; /* top 6 bits */ in2 |= ((relocation & 0x03FC0000) << 2); /* next 8 bits */ in2 |= relocation & 0x0003FFFF; /* bottom 18 bits */ /* change a PC-relative instruction to its absolute equivalent */ /* with this simple hack */ if (make_absolute) in1 |= 0x00100000; bfd_put_32 (abfd, in1, (bfd_byte *) data + addr); bfd_put_32 (abfd, in2, (bfd_byte *) data + addr + 4); return flag; } static bfd_reloc_status_type bfd_elf_d30v_reloc_21 (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 relocation; bfd_vma in1, num; bfd_reloc_status_type r; asection *reloc_target_output_section; bfd_size_type addr = reloc_entry->address; bfd_reloc_status_type flag = bfd_reloc_ok; bfd_vma output_base = 0; reloc_howto_type *howto = reloc_entry->howto; int mask, max; r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message); if (r != bfd_reloc_continue) return r; /* a hacked-up version of bfd_perform_reloc() follows */ if (bfd_is_und_section (symbol->section) && (symbol->flags & BSF_WEAK) == 0 && output_bfd == (bfd *) NULL) flag = bfd_reloc_undefined; /* Is the address of the relocation really within the section? */ if (reloc_entry->address > input_section->_cooked_size) return bfd_reloc_outofrange; /* Work out which section the relocation is targetted at and the initial relocation command value. */ /* Get symbol value. (Common symbols are special.) */ if (bfd_is_com_section (symbol->section)) relocation = 0; else relocation = symbol->value; reloc_target_output_section = symbol->section->output_section; /* Convert input-section-relative symbol value to absolute. */ if (output_bfd) output_base = 0; else output_base = reloc_target_output_section->vma; relocation += output_base + symbol->section->output_offset; /* Add in supplied addend. */ relocation += reloc_entry->addend; /* Here the variable relocation holds the final address of the symbol we are relocating against, plus any addend. */ if (howto->pc_relative == true) { relocation -= input_section->output_section->vma + input_section->output_offset; if (howto->pcrel_offset == true) relocation -= reloc_entry->address; } if (output_bfd != (bfd *) NULL) { /* This is a partial relocation, and we want to apply the relocation to the reloc entry rather than the raw data. Modify the reloc inplace to reflect what we now know. */ reloc_entry->addend = relocation; reloc_entry->address += input_section->output_offset; return flag; } else reloc_entry->addend = 0; in1 = bfd_get_32 (abfd, (bfd_byte *) data + addr); mask = (1 << howto->bitsize) - 1; if (howto->bitsize == 6) mask <<= 12; max = (1 << (howto->bitsize + 2)) - 1; /* extract the addend */ num = in1 & mask; /* 18 bits */ if (howto->bitsize == 6) num >>= 12; num <<= 3; /* shift left 3 */ in1 &= ~mask; /* mask out addend */ relocation += num; if (howto->type == R_D30V_21_PCREL_R || howto->type == R_D30V_15_PCREL_R || howto->type == R_D30V_9_PCREL_R ) { relocation += 4; } if ((int)relocation < 0 ) { if (~(int)relocation > max) flag = bfd_reloc_overflow; } else { if ((int)relocation > max) flag = bfd_reloc_overflow; } relocation >>= 3; if (howto->bitsize == 6) in1 |= ((relocation & (mask >> 12)) << 12); else in1 |= relocation & mask; bfd_put_32 (abfd, in1, (bfd_byte *) data + addr); return flag; } /* Map BFD reloc types to D30V ELF reloc types. */ struct d30v_reloc_map { bfd_reloc_code_real_type bfd_reloc_val; unsigned char elf_reloc_val; }; static const struct d30v_reloc_map d30v_reloc_map[] = { { BFD_RELOC_NONE, R_D30V_NONE, }, { BFD_RELOC_D30V_6, R_D30V_6 }, { BFD_RELOC_D30V_9_PCREL, R_D30V_9_PCREL }, { BFD_RELOC_D30V_9_PCREL_R, R_D30V_9_PCREL_R }, { BFD_RELOC_D30V_15, R_D30V_15 }, { BFD_RELOC_D30V_15_PCREL, R_D30V_15_PCREL }, { BFD_RELOC_D30V_15_PCREL_R, R_D30V_15_PCREL_R }, { BFD_RELOC_D30V_21, R_D30V_21 }, { BFD_RELOC_D30V_21_PCREL, R_D30V_21_PCREL }, { BFD_RELOC_D30V_21_PCREL_R, R_D30V_21_PCREL_R }, { BFD_RELOC_D30V_32, R_D30V_32 }, { BFD_RELOC_D30V_32_PCREL, R_D30V_32_PCREL }, { BFD_RELOC_32, R_D30V_32_NORMAL }, }; static reloc_howto_type * bfd_elf32_bfd_reloc_type_lookup (abfd, code) bfd *abfd ATTRIBUTE_UNUSED; bfd_reloc_code_real_type code; { unsigned int i; for (i = 0; i < sizeof (d30v_reloc_map) / sizeof (struct d30v_reloc_map); i++) { if (d30v_reloc_map[i].bfd_reloc_val == code) return &elf_d30v_howto_table[d30v_reloc_map[i].elf_reloc_val]; } return NULL; } /* Set the howto pointer for an D30V ELF reloc (type REL). */ static void d30v_info_to_howto_rel (abfd, cache_ptr, dst) bfd *abfd ATTRIBUTE_UNUSED; arelent *cache_ptr; Elf32_Internal_Rel *dst; { unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); BFD_ASSERT (r_type < (unsigned int) R_D30V_max); cache_ptr->howto = &elf_d30v_howto_table[r_type]; } /* Set the howto pointer for an D30V ELF reloc (type RELA). */ static void d30v_info_to_howto_rela (abfd, cache_ptr, dst) bfd *abfd ATTRIBUTE_UNUSED; arelent *cache_ptr; Elf32_Internal_Rela *dst; { unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); BFD_ASSERT (r_type < (unsigned int) R_D30V_max); cache_ptr->howto = &elf_d30v_howto_table[r_type]; } #define ELF_ARCH bfd_arch_d30v #define ELF_MACHINE_CODE EM_CYGNUS_D30V #define ELF_MAXPAGESIZE 0x1000 #define TARGET_BIG_SYM bfd_elf32_d30v_vec #define TARGET_BIG_NAME "elf32-d30v" #define elf_info_to_howto d30v_info_to_howto_rela #define elf_info_to_howto_rel d30v_info_to_howto_rel #define elf_backend_object_p 0 #define elf_backend_final_write_processing 0 #include "elf32-target.h"
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