| /* BFD back-end for OpenRISC 1000 COFF binaries. |
| Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2011, 2012 |
| Free Software Foundation, Inc. |
| Contributed by Ivan Guzvinec <ivang@opencores.org> |
| |
| 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. */ |
| |
| #define OR32 1 |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "coff/or32.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| |
| static bfd_reloc_status_type or32_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| |
| #define INSERT_HWORD(WORD,HWORD) \ |
| (((WORD) & 0xffff0000) | ((HWORD)& 0x0000ffff)) |
| #define EXTRACT_HWORD(WORD) \ |
| ((WORD) & 0x0000ffff) |
| #define SIGN_EXTEND_HWORD(HWORD) \ |
| ((HWORD) & 0x8000 ? (HWORD)|(~0xffffL) : (HWORD)) |
| |
| #define INSERT_JUMPTARG(WORD,JT) \ |
| (((WORD) & 0xfc000000) | ((JT)& 0x03ffffff)) |
| #define EXTRACT_JUMPTARG(WORD) \ |
| ((WORD) & 0x03ffffff) |
| #define SIGN_EXTEND_JUMPTARG(JT) \ |
| ((JT) & 0x04000000 ? (JT)|(~0x03ffffffL) : (JT)) |
| |
| /* Provided the symbol, returns the value reffed. */ |
| |
| static long |
| get_symbol_value (asymbol *symbol) |
| { |
| long relocation = 0; |
| |
| if (bfd_is_com_section (symbol->section)) |
| relocation = 0; |
| else |
| relocation = symbol->value + |
| symbol->section->output_section->vma + |
| symbol->section->output_offset; |
| |
| return relocation; |
| } |
| |
| /* This function is in charge of performing all the or32 relocations. */ |
| |
| static bfd_reloc_status_type |
| or32_reloc (bfd *abfd, |
| arelent *reloc_entry, |
| asymbol *symbol_in, |
| void * data, |
| asection *input_section, |
| bfd *output_bfd, |
| char **error_message) |
| { |
| /* The consth relocation comes in two parts, we have to remember |
| the state between calls, in these variables. */ |
| static bfd_boolean part1_consth_active = FALSE; |
| static unsigned long part1_consth_value; |
| |
| unsigned long insn; |
| unsigned long sym_value; |
| unsigned long unsigned_value; |
| unsigned short r_type; |
| long signed_value; |
| |
| unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/ |
| bfd_byte *hit_data =addr + (bfd_byte *)(data); |
| |
| r_type = reloc_entry->howto->type; |
| |
| if (output_bfd) |
| { |
| /* Partial linking - do nothing. */ |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (symbol_in != NULL |
| && bfd_is_und_section (symbol_in->section)) |
| { |
| /* Keep the state machine happy in case we're called again. */ |
| if (r_type == R_IHIHALF) |
| { |
| part1_consth_active = TRUE; |
| part1_consth_value = 0; |
| } |
| |
| return bfd_reloc_undefined; |
| } |
| |
| if ((part1_consth_active) && (r_type != R_IHCONST)) |
| { |
| part1_consth_active = FALSE; |
| *error_message = (char *) "Missing IHCONST"; |
| |
| return bfd_reloc_dangerous; |
| } |
| |
| sym_value = get_symbol_value (symbol_in); |
| |
| switch (r_type) |
| { |
| case R_IREL: |
| insn = bfd_get_32(abfd, hit_data); |
| |
| /* Take the value in the field and sign extend it. */ |
| signed_value = EXTRACT_JUMPTARG (insn); |
| signed_value = SIGN_EXTEND_JUMPTARG (signed_value); |
| signed_value <<= 2; |
| |
| /* See the note on the R_IREL reloc in coff_or32_relocate_section. */ |
| if (signed_value == - (long) reloc_entry->address) |
| signed_value = 0; |
| |
| signed_value += sym_value + reloc_entry->addend; |
| /* Relative jmp/call, so subtract from the value the |
| address of the place we're coming from. */ |
| signed_value -= (reloc_entry->address |
| + input_section->output_section->vma |
| + input_section->output_offset); |
| if (signed_value > 0x7ffffff || signed_value < -0x8000000) |
| return bfd_reloc_overflow; |
| |
| signed_value >>= 2; |
| insn = INSERT_JUMPTARG (insn, signed_value); |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| |
| case R_ILOHALF: |
| insn = bfd_get_32 (abfd, hit_data); |
| unsigned_value = EXTRACT_HWORD (insn); |
| unsigned_value += sym_value + reloc_entry->addend; |
| insn = INSERT_HWORD (insn, unsigned_value); |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| |
| case R_IHIHALF: |
| insn = bfd_get_32 (abfd, hit_data); |
| |
| /* consth, part 1 |
| Just get the symbol value that is referenced. */ |
| part1_consth_active = TRUE; |
| part1_consth_value = sym_value + reloc_entry->addend; |
| |
| /* Don't modify insn until R_IHCONST. */ |
| break; |
| |
| case R_IHCONST: |
| insn = bfd_get_32 (abfd, hit_data); |
| |
| /* consth, part 2 |
| Now relocate the reference. */ |
| if (! part1_consth_active) |
| { |
| *error_message = (char *) "Missing IHIHALF"; |
| return bfd_reloc_dangerous; |
| } |
| |
| /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */ |
| unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/ |
| unsigned_value += reloc_entry->addend; /* r_symndx */ |
| unsigned_value += part1_consth_value; |
| unsigned_value = unsigned_value >> 16; |
| insn = INSERT_HWORD (insn, unsigned_value); |
| part1_consth_active = FALSE; |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| |
| case R_BYTE: |
| insn = bfd_get_8 (abfd, hit_data); |
| unsigned_value = insn + sym_value + reloc_entry->addend; |
| if (unsigned_value & 0xffffff00) |
| return bfd_reloc_overflow; |
| bfd_put_8 (abfd, unsigned_value, hit_data); |
| break; |
| |
| case R_HWORD: |
| insn = bfd_get_16 (abfd, hit_data); |
| unsigned_value = insn + sym_value + reloc_entry->addend; |
| if (unsigned_value & 0xffff0000) |
| return bfd_reloc_overflow; |
| bfd_put_16 (abfd, insn, hit_data); |
| break; |
| |
| case R_WORD: |
| insn = bfd_get_32 (abfd, hit_data); |
| insn += sym_value + reloc_entry->addend; |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| |
| default: |
| *error_message = _("Unrecognized reloc"); |
| return bfd_reloc_dangerous; |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| /* type rightshift |
| size |
| bitsize |
| pc-relative |
| bitpos |
| absolute |
| complain_on_overflow |
| special_function |
| relocation name |
| partial_inplace |
| src_mask |
| */ |
| |
| /* FIXME: I'm not real sure about this table. */ |
| static reloc_howto_type howto_table[] = |
| { |
| { R_ABS, 0, 3, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "ABS", TRUE, 0xffffffff,0xffffffff, FALSE }, |
| EMPTY_HOWTO (1), |
| EMPTY_HOWTO (2), |
| EMPTY_HOWTO (3), |
| EMPTY_HOWTO (4), |
| EMPTY_HOWTO (5), |
| EMPTY_HOWTO (6), |
| EMPTY_HOWTO (7), |
| EMPTY_HOWTO (8), |
| EMPTY_HOWTO (9), |
| EMPTY_HOWTO (10), |
| EMPTY_HOWTO (11), |
| EMPTY_HOWTO (12), |
| EMPTY_HOWTO (13), |
| EMPTY_HOWTO (14), |
| EMPTY_HOWTO (15), |
| EMPTY_HOWTO (16), |
| EMPTY_HOWTO (17), |
| EMPTY_HOWTO (18), |
| EMPTY_HOWTO (19), |
| EMPTY_HOWTO (20), |
| EMPTY_HOWTO (21), |
| EMPTY_HOWTO (22), |
| EMPTY_HOWTO (23), |
| { R_IREL, 0, 3, 32, TRUE, 0, complain_overflow_signed, or32_reloc, "IREL", TRUE, 0xffffffff,0xffffffff, FALSE }, |
| { R_IABS, 0, 3, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "IABS", TRUE, 0xffffffff,0xffffffff, FALSE }, |
| { R_ILOHALF, 0, 3, 16, TRUE, 0, complain_overflow_signed, or32_reloc, "ILOHALF", TRUE, 0x0000ffff,0x0000ffff, FALSE }, |
| { R_IHIHALF, 0, 3, 16, TRUE, 16,complain_overflow_signed, or32_reloc, "IHIHALF", TRUE, 0xffff0000,0xffff0000, FALSE }, |
| { R_IHCONST, 0, 3, 16, TRUE, 0, complain_overflow_signed, or32_reloc, "IHCONST", TRUE, 0xffff0000,0xffff0000, FALSE }, |
| { R_BYTE, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, or32_reloc, "BYTE", TRUE, 0x000000ff,0x000000ff, FALSE }, |
| { R_HWORD, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, or32_reloc, "HWORD", TRUE, 0x0000ffff,0x0000ffff, FALSE }, |
| { R_WORD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "WORD", TRUE, 0xffffffff,0xffffffff, FALSE }, |
| }; |
| |
| #define BADMAG(x) OR32BADMAG (x) |
| |
| #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \ |
| reloc_processing (relent, reloc, symbols, abfd, section) |
| |
| static void |
| reloc_processing (arelent *relent, |
| struct internal_reloc *reloc, |
| asymbol **symbols, |
| bfd *abfd, |
| asection *section) |
| { |
| static bfd_vma ihihalf_vaddr = (bfd_vma) -1; |
| |
| relent->address = reloc->r_vaddr; |
| relent->howto = howto_table + reloc->r_type; |
| |
| if (reloc->r_type == R_IHCONST) |
| { |
| /* The address of an R_IHCONST should always be the address of |
| the immediately preceding R_IHIHALF. relocs generated by gas |
| are correct, but relocs generated by High C are different (I |
| can't figure out what the address means for High C). We can |
| handle both gas and High C by ignoring the address here, and |
| simply reusing the address saved for R_IHIHALF. */ |
| if (ihihalf_vaddr == (bfd_vma) -1) |
| abort (); |
| |
| relent->address = ihihalf_vaddr; |
| ihihalf_vaddr = (bfd_vma) -1; |
| relent->addend = reloc->r_symndx; |
| relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr; |
| } |
| else |
| { |
| relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; |
| relent->addend = 0; |
| relent->address-= section->vma; |
| |
| if (reloc->r_type == R_IHIHALF) |
| ihihalf_vaddr = relent->address; |
| else if (ihihalf_vaddr != (bfd_vma) -1) |
| abort (); |
| } |
| } |
| |
| /* The reloc processing routine for the optimized COFF linker. */ |
| |
| static bfd_boolean |
| coff_or32_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info, |
| bfd *input_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| struct internal_reloc *relocs, |
| struct internal_syment *syms, |
| asection **sections) |
| { |
| struct internal_reloc *rel; |
| struct internal_reloc *relend; |
| bfd_boolean hihalf; |
| bfd_vma hihalf_val; |
| |
| /* If we are performing a relocatable link, we don't need to do a |
| thing. The caller will take care of adjusting the reloc |
| addresses and symbol indices. */ |
| if (info->relocatable) |
| return TRUE; |
| |
| hihalf = FALSE; |
| hihalf_val = 0; |
| |
| rel = relocs; |
| relend = rel + input_section->reloc_count; |
| |
| for (; rel < relend; rel++) |
| { |
| long symndx; |
| bfd_byte *loc; |
| struct coff_link_hash_entry *h; |
| struct internal_syment *sym; |
| asection *sec; |
| bfd_vma val; |
| bfd_boolean overflow; |
| unsigned long insn; |
| long signed_value; |
| unsigned long unsigned_value; |
| bfd_reloc_status_type rstat; |
| |
| symndx = rel->r_symndx; |
| loc = contents + rel->r_vaddr - input_section->vma; |
| |
| if (symndx == -1 || rel->r_type == R_IHCONST) |
| h = NULL; |
| else |
| h = obj_coff_sym_hashes (input_bfd)[symndx]; |
| |
| sym = NULL; |
| sec = NULL; |
| val = 0; |
| |
| /* An R_IHCONST reloc does not have a symbol. Instead, the |
| symbol index is an addend. R_IHCONST is always used in |
| conjunction with R_IHHALF. */ |
| if (rel->r_type != R_IHCONST) |
| { |
| if (h == NULL) |
| { |
| if (symndx == -1) |
| sec = bfd_abs_section_ptr; |
| else |
| { |
| sym = syms + symndx; |
| sec = sections[symndx]; |
| val = (sec->output_section->vma |
| + sec->output_offset |
| + sym->n_value |
| - sec->vma); |
| } |
| } |
| else |
| { |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| val = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, input_section, |
| rel->r_vaddr - input_section->vma, TRUE))) |
| return FALSE; |
| } |
| } |
| |
| if (hihalf) |
| { |
| if (! ((*info->callbacks->reloc_dangerous) |
| (info, "missing IHCONST reloc", input_bfd, |
| input_section, rel->r_vaddr - input_section->vma))) |
| return FALSE; |
| hihalf = FALSE; |
| } |
| } |
| |
| overflow = FALSE; |
| |
| switch (rel->r_type) |
| { |
| default: |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| |
| case R_IREL: |
| insn = bfd_get_32 (input_bfd, loc); |
| |
| /* Extract the addend. */ |
| signed_value = EXTRACT_JUMPTARG (insn); |
| signed_value = SIGN_EXTEND_JUMPTARG (signed_value); |
| signed_value <<= 2; |
| |
| /* Determine the destination of the jump. */ |
| signed_value += val; |
| |
| /* Make the destination PC relative. */ |
| signed_value -= (input_section->output_section->vma |
| + input_section->output_offset |
| + (rel->r_vaddr - input_section->vma)); |
| if (signed_value > 0x7ffffff || signed_value < - 0x8000000) |
| { |
| overflow = TRUE; |
| signed_value = 0; |
| } |
| |
| /* Put the adjusted value back into the instruction. */ |
| signed_value >>= 2; |
| insn = INSERT_JUMPTARG(insn, signed_value); |
| |
| bfd_put_32 (input_bfd, (bfd_vma) insn, loc); |
| break; |
| |
| case R_ILOHALF: |
| insn = bfd_get_32 (input_bfd, loc); |
| unsigned_value = EXTRACT_HWORD (insn); |
| unsigned_value += val; |
| insn = INSERT_HWORD (insn, unsigned_value); |
| bfd_put_32 (input_bfd, insn, loc); |
| break; |
| |
| case R_IHIHALF: |
| /* Save the value for the R_IHCONST reloc. */ |
| hihalf = TRUE; |
| hihalf_val = val; |
| break; |
| |
| case R_IHCONST: |
| if (! hihalf) |
| { |
| if (! ((*info->callbacks->reloc_dangerous) |
| (info, "missing IHIHALF reloc", input_bfd, |
| input_section, rel->r_vaddr - input_section->vma))) |
| return FALSE; |
| hihalf_val = 0; |
| } |
| |
| insn = bfd_get_32 (input_bfd, loc); |
| unsigned_value = rel->r_symndx + hihalf_val; |
| unsigned_value >>= 16; |
| insn = INSERT_HWORD (insn, unsigned_value); |
| bfd_put_32 (input_bfd, (bfd_vma) insn, loc); |
| |
| hihalf = FALSE; |
| break; |
| |
| case R_BYTE: |
| case R_HWORD: |
| case R_WORD: |
| rstat = _bfd_relocate_contents (howto_table + rel->r_type, |
| input_bfd, val, loc); |
| if (rstat == bfd_reloc_overflow) |
| overflow = TRUE; |
| else if (rstat != bfd_reloc_ok) |
| abort (); |
| break; |
| } |
| |
| if (overflow) |
| { |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| |
| if (symndx == -1) |
| name = "*ABS*"; |
| else if (h != NULL) |
| name = NULL; |
| else if (sym == NULL) |
| name = "*unknown*"; |
| else if (sym->_n._n_n._n_zeroes == 0 |
| && sym->_n._n_n._n_offset != 0) |
| name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; |
| else |
| { |
| strncpy (buf, sym->_n._n_name, SYMNMLEN); |
| buf[SYMNMLEN] = '\0'; |
| name = buf; |
| } |
| |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, (h ? &h->root : NULL), name, |
| howto_table[rel->r_type].name, (bfd_vma) 0, input_bfd, |
| input_section, rel->r_vaddr - input_section->vma))) |
| return FALSE; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| #define coff_relocate_section coff_or32_relocate_section |
| |
| /* We don't want to change the symndx of a R_IHCONST reloc, since it |
| is actually an addend, not a symbol index at all. */ |
| |
| static bfd_boolean |
| coff_or32_adjust_symndx (bfd *obfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| bfd *ibfd ATTRIBUTE_UNUSED, |
| asection *sec ATTRIBUTE_UNUSED, |
| struct internal_reloc *irel, |
| bfd_boolean *adjustedp) |
| { |
| if (irel->r_type == R_IHCONST) |
| *adjustedp = TRUE; |
| else |
| *adjustedp = FALSE; |
| return TRUE; |
| } |
| |
| #define coff_adjust_symndx coff_or32_adjust_symndx |
| |
| #ifndef bfd_pe_print_pdata |
| #define bfd_pe_print_pdata NULL |
| #endif |
| |
| #include "coffcode.h" |
| |
| const bfd_target or32coff_big_vec = |
| { |
| "coff-or32-big", /* Name. */ |
| bfd_target_coff_flavour, |
| BFD_ENDIAN_BIG, /* Data byte order is big. */ |
| BFD_ENDIAN_BIG, /* Header byte order is big. */ |
| |
| (HAS_RELOC | EXEC_P | /* Object flags. */ |
| HAS_LINENO | HAS_DEBUG | |
| HAS_SYMS | HAS_LOCALS | WP_TEXT), |
| |
| (SEC_HAS_CONTENTS | SEC_ALLOC | /* Section flags. */ |
| SEC_LOAD | SEC_RELOC | |
| SEC_READONLY ), |
| '_', /* Leading underscore. */ |
| '/', /* ar_pad_char. */ |
| 15, /* ar_max_namelen. */ |
| 0, /* match priority. */ |
| |
| /* Data. */ |
| bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| bfd_getb16, bfd_getb_signed_16, bfd_putb16, |
| |
| /* Headers. */ |
| bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| bfd_getb16, bfd_getb_signed_16, bfd_putb16, |
| |
| { |
| _bfd_dummy_target, |
| coff_object_p, |
| bfd_generic_archive_p, |
| _bfd_dummy_target |
| }, |
| { |
| bfd_false, |
| coff_mkobject, |
| _bfd_generic_mkarchive, |
| bfd_false |
| }, |
| { |
| bfd_false, |
| coff_write_object_contents, |
| _bfd_write_archive_contents, |
| bfd_false |
| }, |
| |
| BFD_JUMP_TABLE_GENERIC (coff), |
| BFD_JUMP_TABLE_COPY (coff), |
| BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| BFD_JUMP_TABLE_SYMBOLS (coff), |
| BFD_JUMP_TABLE_RELOCS (coff), |
| BFD_JUMP_TABLE_WRITE (coff), |
| BFD_JUMP_TABLE_LINK (coff), |
| BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| |
| /* Alternative_target. */ |
| #ifdef TARGET_LITTLE_SYM |
| & TARGET_LITTLE_SYM, |
| #else |
| NULL, |
| #endif |
| |
| COFF_SWAP_TABLE |
| }; |
