| /* BFD back-end for MAXQ COFF binaries. |
| Copyright 2004, 2007 Free Software Foundation, Inc. |
| |
| Contributed by Vineet Sharma (vineets@noida.hcltech.com) Inderpreet S. |
| (inderpreetb@noida.hcltech.com) |
| |
| HCL Technologies Ltd. |
| |
| 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 "coff/maxq.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| #include "libiberty.h" |
| |
| #ifndef MAXQ20 |
| #define MAXQ20 1 |
| #endif |
| |
| #define RTYPE2HOWTO(cache_ptr, dst) \ |
| ((cache_ptr)->howto = \ |
| ((dst)->r_type < 48 \ |
| ? howto_table + (((dst)->r_type==47) ? 6: ((dst)->r_type)) \ |
| : NULL)) |
| |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| |
| /* Code to swap in the reloc offset. */ |
| #define SWAP_IN_RELOC_OFFSET H_GET_16 |
| #define SWAP_OUT_RELOC_OFFSET H_PUT_16 |
| |
| #define SHORT_JUMP BFD_RELOC_16_PCREL_S2 |
| #define LONG_JUMP BFD_RELOC_14 |
| #define ABSOLUTE_ADDR_FOR_DATA BFD_RELOC_24 |
| |
| /* checks the range of short jump -127 to 128 */ |
| #define IS_SJUMP_RANGE(x) ((x > -128) && (x < 129)) |
| #define HIGH_WORD_MASK 0xff00 |
| #define LOW_WORD_MASK 0x00ff |
| |
| 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 performs all the maxq relocations. |
| FIXME: The handling of the addend in the 'BFD_*' |
| relocations types. */ |
| |
| static bfd_reloc_status_type |
| coff_maxq20_reloc (bfd * abfd, |
| arelent * reloc_entry, |
| asymbol * symbol_in, |
| void * data, |
| asection * input_section ATTRIBUTE_UNUSED, |
| bfd * output_bfd ATTRIBUTE_UNUSED, |
| char ** error_message ATTRIBUTE_UNUSED) |
| { |
| unsigned char *addr = NULL; |
| unsigned long x = 0; |
| long call_addr = 0; |
| short addend = 0; |
| long diff = 0; |
| |
| /* If this is an undefined symbol, return error. */ |
| if (symbol_in->section == &bfd_und_section |
| && (symbol_in->flags & BSF_WEAK) == 0) |
| return bfd_reloc_continue; |
| |
| if (data && reloc_entry) |
| { |
| addr = (unsigned char *) data + reloc_entry->address; |
| call_addr = call_addr - call_addr; |
| call_addr = get_symbol_value (symbol_in); |
| |
| /* Over here the value val stores the 8 bit/16 bit value. We will put a |
| check if we are moving a 16 bit immediate value into an 8 bit |
| register. In that case we will generate a Upper bytes into PFX[0] |
| and move the lower 8 bits as SRC. */ |
| |
| switch (reloc_entry->howto->type) |
| { |
| /* BFD_RELOC_16_PCREL_S2 47 Handles all the relative jumps and |
| calls Note: Every relative jump or call is in words. */ |
| case SHORT_JUMP: |
| /* Handle any addend. */ |
| addend = reloc_entry->addend; |
| |
| if (addend > call_addr || addend > 0) |
| call_addr = symbol_in->section->output_section->vma + addend; |
| else if (addend < call_addr && addend > 0) |
| call_addr = call_addr + addend; |
| else if (addend < 0) |
| call_addr = call_addr + addend; |
| |
| diff = ((call_addr << 1) - (reloc_entry->address << 1)); |
| |
| if (!IS_SJUMP_RANGE (diff)) |
| { |
| bfd_perror (_("Can't Make it a Short Jump")); |
| return bfd_reloc_outofrange; |
| } |
| |
| x = bfd_get_16 (abfd, addr); |
| |
| x = x & LOW_WORD_MASK; |
| x = x | (diff << 8); |
| bfd_put_16 (abfd, (bfd_vma) x, addr); |
| |
| return bfd_reloc_ok; |
| |
| case ABSOLUTE_ADDR_FOR_DATA: |
| case LONG_JUMP: |
| /* BFD_RELOC_14 Handles intersegment or long jumps which might be |
| from code to code or code to data segment jumps. Note: When this |
| fucntion is called by gas the section flags somehow do not |
| contain the info about the section type(CODE or DATA). Thus the |
| user needs to evoke the linker after assembling the files |
| because the Code-Code relocs are word aligned but code-data are |
| byte aligned. */ |
| addend = (reloc_entry->addend - reloc_entry->addend); |
| |
| /* Handle any addend. */ |
| addend = reloc_entry->addend; |
| |
| /* For relocation involving multiple file added becomes zero thus |
| this fails - check for zero added. In another case when we try |
| to add a stub to a file the addend shows the offset from the |
| start od this file. */ |
| addend = 0; |
| |
| if (!bfd_is_com_section (symbol_in->section) && |
| ((symbol_in->flags & BSF_OLD_COMMON) == 0)) |
| { |
| if (reloc_entry->addend > symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| |
| if ((reloc_entry->addend < symbol_in->value) |
| && (reloc_entry->addend != 0)) |
| addend = reloc_entry->addend - symbol_in->value; |
| |
| if (reloc_entry->addend == symbol_in->value) |
| addend = 0; |
| } |
| |
| if (bfd_is_com_section (symbol_in->section) || |
| ((symbol_in->flags & BSF_OLD_COMMON) != 0)) |
| addend = reloc_entry->addend; |
| |
| if (addend < 0 |
| && (call_addr < (long) (addend * (-1)))) |
| addend = 0; |
| |
| call_addr += addend; |
| |
| /* FIXME: This check does not work well with the assembler, |
| linker needs to be run always. */ |
| if ((symbol_in->section->flags & SEC_CODE) == SEC_CODE) |
| { |
| /* Convert it into words. */ |
| call_addr = call_addr >> 1; |
| |
| if (call_addr > 0xFFFF) /* Intersegment Jump. */ |
| { |
| bfd_perror (_("Exceeds Long Jump Range")); |
| return bfd_reloc_outofrange; |
| } |
| } |
| else |
| { |
| /* case ABSOLUTE_ADDR_FOR_DATA : Resolves any code-data |
| segemnt relocs. These are NOT word aligned. */ |
| |
| if (call_addr > 0xFFFF) /* Intersegment Jump. */ |
| { |
| bfd_perror (_("Absolute address Exceeds 16 bit Range")); |
| return bfd_reloc_outofrange; |
| } |
| } |
| |
| x = bfd_get_32 (abfd, addr); |
| |
| x = (x & 0xFF00FF00); |
| x = (x | ((call_addr & HIGH_WORD_MASK) >> 8)); |
| x = (x | (call_addr & LOW_WORD_MASK) << 16); |
| |
| bfd_put_32 (abfd, (bfd_vma) x, addr); |
| return bfd_reloc_ok; |
| |
| case BFD_RELOC_8: |
| addend = (reloc_entry->addend - reloc_entry->addend); |
| |
| if (!bfd_is_com_section (symbol_in->section) && |
| ((symbol_in->flags & BSF_OLD_COMMON) == 0)) |
| { |
| if (reloc_entry->addend > symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| if (reloc_entry->addend < symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| if (reloc_entry->addend == symbol_in->value) |
| addend = 0; |
| } |
| |
| if (bfd_is_com_section (symbol_in->section) || |
| ((symbol_in->flags & BSF_OLD_COMMON) != 0)) |
| addend = reloc_entry->addend; |
| |
| if (addend < 0 |
| && (call_addr < (long) (addend * (-1)))) |
| addend = 0; |
| |
| if (call_addr + addend > 0xFF) |
| { |
| bfd_perror (_("Absolute address Exceeds 8 bit Range")); |
| return bfd_reloc_outofrange; |
| } |
| |
| x = bfd_get_8 (abfd, addr); |
| x = x & 0x00; |
| x = x | (call_addr + addend); |
| |
| bfd_put_8 (abfd, (bfd_vma) x, addr); |
| return bfd_reloc_ok; |
| |
| case BFD_RELOC_16: |
| addend = (reloc_entry->addend - reloc_entry->addend); |
| if (!bfd_is_com_section (symbol_in->section) && |
| ((symbol_in->flags & BSF_OLD_COMMON) == 0)) |
| { |
| if (reloc_entry->addend > symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| |
| if (reloc_entry->addend < symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| |
| if (reloc_entry->addend == symbol_in->value) |
| addend = 0; |
| } |
| |
| if (bfd_is_com_section (symbol_in->section) || |
| ((symbol_in->flags & BSF_OLD_COMMON) != 0)) |
| addend = reloc_entry->addend; |
| |
| if (addend < 0 |
| && (call_addr < (long) (addend * (-1)))) |
| addend = 0; |
| |
| if ((call_addr + addend) > 0xFFFF) |
| { |
| bfd_perror (_("Absolute address Exceeds 16 bit Range")); |
| return bfd_reloc_outofrange; |
| } |
| else |
| { |
| unsigned short val = (call_addr + addend); |
| |
| x = bfd_get_16 (abfd, addr); |
| |
| /* LE */ |
| x = (x & 0x0000); /* Flush garbage value. */ |
| x = val; |
| if ((symbol_in->section->flags & SEC_CODE) == SEC_CODE) |
| x = x >> 1; /* Convert it into words. */ |
| } |
| |
| bfd_put_16 (abfd, (bfd_vma) x, addr); |
| return bfd_reloc_ok; |
| |
| case BFD_RELOC_32: |
| addend = (reloc_entry->addend - reloc_entry->addend); |
| |
| if (!bfd_is_com_section (symbol_in->section) && |
| ((symbol_in->flags & BSF_OLD_COMMON) == 0)) |
| { |
| if (reloc_entry->addend > symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| if (reloc_entry->addend < symbol_in->value) |
| addend = reloc_entry->addend - symbol_in->value; |
| if (reloc_entry->addend == symbol_in->value) |
| addend = 0; |
| } |
| |
| if (bfd_is_com_section (symbol_in->section) || |
| ((symbol_in->flags & BSF_OLD_COMMON) != 0)) |
| addend = reloc_entry->addend; |
| |
| if (addend < 0 |
| && (call_addr < (long) (addend * (-1)))) |
| addend = 0; |
| |
| if ((call_addr + addend) < 0) |
| { |
| bfd_perror ("Absolute address Exceeds 32 bit Range"); |
| return bfd_reloc_outofrange; |
| } |
| |
| x = bfd_get_32 (abfd, addr); |
| x = (x & 0x0000); /* Flush garbage value. */ |
| x = call_addr + addend; |
| if ((symbol_in->section->flags & SEC_CODE) == SEC_CODE) |
| x = x >> 1; /* Convert it into words. */ |
| |
| bfd_put_32 (abfd, (bfd_vma) x, addr); |
| return bfd_reloc_ok; |
| |
| default: |
| bfd_perror (_("Unrecognized Reloc Type")); |
| return bfd_reloc_notsupported; |
| } |
| } |
| |
| return bfd_reloc_notsupported; |
| } |
| |
| static reloc_howto_type howto_table[] = |
| { |
| EMPTY_HOWTO (0), |
| EMPTY_HOWTO (1), |
| { |
| BFD_RELOC_32, 0, 1, 8, FALSE, 0, complain_overflow_bitfield, |
| coff_maxq20_reloc, "32Bit", TRUE, 0x000000ff, 0x000000ff, TRUE |
| }, |
| { |
| SHORT_JUMP, 0, 1, 8, FALSE, 0, complain_overflow_bitfield, |
| coff_maxq20_reloc, "SHORT_JMP", TRUE, 0x000000ff, 0x000000ff, TRUE |
| }, |
| { |
| ABSOLUTE_ADDR_FOR_DATA, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| coff_maxq20_reloc, "INTERSEGMENT_RELOC", TRUE, 0x00000000, 0x00000000, |
| FALSE |
| }, |
| { |
| BFD_RELOC_16, 0, 1, 8, FALSE, 0, complain_overflow_bitfield, |
| coff_maxq20_reloc, "16Bit", TRUE, 0x000000ff, 0x000000ff, TRUE |
| }, |
| { |
| LONG_JUMP, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| coff_maxq20_reloc, "LONG_JUMP", TRUE, 0x00000000, 0x00000000, FALSE |
| }, |
| { |
| BFD_RELOC_8, 0, 1, 8, FALSE, 0, complain_overflow_bitfield, |
| coff_maxq20_reloc, "8bit", TRUE, 0x000000ff, 0x000000ff, TRUE |
| }, |
| EMPTY_HOWTO (8), |
| EMPTY_HOWTO (9), |
| EMPTY_HOWTO (10), |
| }; |
| |
| static reloc_howto_type * |
| maxq_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| switch (code) |
| { |
| /* SHORT JUMP */ |
| case BFD_RELOC_16_PCREL_S2: |
| return howto_table + 3; |
| |
| /* INTERSEGMENT JUMP */ |
| case BFD_RELOC_24: |
| return howto_table + 4; |
| |
| /* BYTE RELOC */ |
| case BFD_RELOC_8: |
| return howto_table + 7; |
| |
| /* WORD RELOC */ |
| case BFD_RELOC_16: |
| return howto_table + 5; |
| |
| /* LONG RELOC */ |
| case BFD_RELOC_32: |
| return howto_table + 2; |
| |
| /* LONG JUMP */ |
| case BFD_RELOC_14: |
| return howto_table + 6; |
| |
| default: |
| return NULL; |
| } |
| } |
| |
| static reloc_howto_type * |
| maxq_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) |
| if (howto_table[i].name != NULL |
| && strcasecmp (howto_table[i].name, r_name) == 0) |
| return &howto_table[i]; |
| |
| return NULL; |
| } |
| |
| #define coff_bfd_reloc_type_lookup maxq_reloc_type_lookup |
| #define coff_bfd_reloc_name_lookup maxq_reloc_name_lookup |
| |
| /* Perform any necessary magic to the addend in a reloc entry. */ |
| #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ |
| cache_ptr->addend = ext_reloc.r_offset; |
| |
| #include "coffcode.h" |
| |
| #ifndef TARGET_UNDERSCORE |
| #define TARGET_UNDERSCORE 1 |
| #endif |
| |
| #ifndef EXTRA_S_FLAGS |
| #define EXTRA_S_FLAGS 0 |
| #endif |
| |
| /* Forward declaration for use initialising alternative_target field. */ |
| CREATE_LITTLE_COFF_TARGET_VEC (maxqcoff_vec, "coff-maxq", 0, EXTRA_S_FLAGS, |
| TARGET_UNDERSCORE, NULL, COFF_SWAP_TABLE); |
| |