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[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [bfd/] [elf32-d30v.c] - Rev 843
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/* D30V-specific support for 32-bit ELF Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 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 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. */ #include "sysdep.h" #include "bfd.h" #include "libbfd.h" #include "elf-bfd.h" #include "elf/d30v.h" #define MAX32 ((bfd_signed_vma) 0x7fffffff) #define MIN32 (- MAX32 - 1) static bfd_reloc_status_type bfd_elf_d30v_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, void * data, asection *input_section, bfd *output_bfd, char **error_message) { bfd_signed_vma 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; if (output_bfd != NULL) { /* Partial linking -- do nothing. */ reloc_entry->address += input_section->output_offset; return bfd_reloc_ok; } 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 == NULL) flag = bfd_reloc_undefined; /* Is the address of the relocation really within the section? */ if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) return bfd_reloc_outofrange; /* Work out which section the relocation is targeted 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. */ 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) { tmp_addr = input_section->output_section->vma + input_section->output_offset + reloc_entry->address; relocation -= tmp_addr; } 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 && howto->bitsize == 32) { /* The D30V has a PC that doesn't wrap and PC-relative jumps are signed, so a PC-relative jump can't be more than +/- 2^31 bytes. If one exceeds this, change it to an absolute jump. */ if (relocation > MAX32 || 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 (bfd *abfd, arelent *reloc_entry, asymbol *symbol, void * 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; if (output_bfd != NULL) { /* Partial linking -- do nothing. */ reloc_entry->address += input_section->output_offset; return bfd_reloc_ok; } 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 == NULL) flag = bfd_reloc_undefined; /* Is the address of the relocation really within the section? */ if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) return bfd_reloc_outofrange; /* Work out which section the relocation is targeted 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. */ 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) { relocation -= (input_section->output_section->vma + input_section->output_offset); if (howto->pcrel_offset) relocation -= reloc_entry->address; } 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; } 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. */ }; /* 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 (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; } static reloc_howto_type * bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) { unsigned int i; for (i = 0; i < sizeof (elf_d30v_howto_table) / sizeof (elf_d30v_howto_table[0]); i++) if (elf_d30v_howto_table[i].name != NULL && strcasecmp (elf_d30v_howto_table[i].name, r_name) == 0) return &elf_d30v_howto_table[i]; return NULL; } /* Set the howto pointer for an D30V ELF reloc (type REL). */ static void d30v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, Elf_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]; } /* Set the howto pointer for an D30V ELF reloc (type RELA). */ static void d30v_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, Elf_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_D30V #define ELF_MACHINE_ALT1 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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