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author | Dan Albert <danalbert@google.com> | 2015-06-17 15:33:58 -0700 |
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committer | Dan Albert <danalbert@google.com> | 2015-06-17 15:33:58 -0700 |
commit | 7a1d76c6c5b354abbba43308d5061eb6ff96d3ea (patch) | |
tree | 78a639d039e517565afa35d7af021a6967bec0d9 /binutils-2.19/bfd/elf32-msp430.c | |
parent | c39479f4ab4d372b518957871e1f205a03e7c3d6 (diff) | |
download | toolchain_binutils-7a1d76c6c5b354abbba43308d5061eb6ff96d3ea.zip toolchain_binutils-7a1d76c6c5b354abbba43308d5061eb6ff96d3ea.tar.gz toolchain_binutils-7a1d76c6c5b354abbba43308d5061eb6ff96d3ea.tar.bz2 |
Remove old versions of binutils.
Change-Id: If634d8d30cfa8c88ca3ba59691a0df4ee5596f85
Diffstat (limited to 'binutils-2.19/bfd/elf32-msp430.c')
-rw-r--r-- | binutils-2.19/bfd/elf32-msp430.c | 1191 |
1 files changed, 0 insertions, 1191 deletions
diff --git a/binutils-2.19/bfd/elf32-msp430.c b/binutils-2.19/bfd/elf32-msp430.c deleted file mode 100644 index 7a57024..0000000 --- a/binutils-2.19/bfd/elf32-msp430.c +++ /dev/null @@ -1,1191 +0,0 @@ -/* MSP430-specific support for 32-bit ELF - Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 - Free Software Foundation, Inc. - Contributed by Dmitry Diky <diwil@mail.ru> - - 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 "libiberty.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/msp430.h" - -/* Use RELA instead of REL. */ -#undef USE_REL - -static reloc_howto_type elf_msp430_howto_table[] = -{ - HOWTO (R_MSP430_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_MSP430_NONE", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_MSP430_32, /* 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_MSP430_32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* A 13 bit PC relative relocation. */ - HOWTO (R_MSP430_10_PCREL, /* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 10, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_13_PCREL", /* name */ - FALSE, /* partial_inplace */ - 0xfff, /* src_mask */ - 0xfff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - /* A 16 bit absolute relocation. */ - HOWTO (R_MSP430_16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_16", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* A 16 bit absolute relocation for command address. */ - HOWTO (R_MSP430_16_PCREL, /* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_16_PCREL", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - /* A 16 bit absolute relocation, byte operations. */ - HOWTO (R_MSP430_16_BYTE, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_16_BYTE", /* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* A 16 bit absolute relocation for command address. */ - HOWTO (R_MSP430_16_PCREL_BYTE,/* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_16_PCREL_BYTE",/* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - /* A 13 bit PC relative relocation for complicated polymorphs. */ - HOWTO (R_MSP430_2X_PCREL, /* type */ - 1, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 10, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_2X_PCREL", /* name */ - FALSE, /* partial_inplace */ - 0xfff, /* src_mask */ - 0xfff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - /* A 16 bit relaxable relocation for command address. */ - HOWTO (R_MSP430_RL_PCREL, /* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_MSP430_RL_PCREL", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - TRUE) /* pcrel_offset */ -}; - -/* Map BFD reloc types to MSP430 ELF reloc types. */ - -struct msp430_reloc_map -{ - bfd_reloc_code_real_type bfd_reloc_val; - unsigned int elf_reloc_val; -}; - -static const struct msp430_reloc_map msp430_reloc_map[] = - { - {BFD_RELOC_NONE, R_MSP430_NONE}, - {BFD_RELOC_32, R_MSP430_32}, - {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL}, - {BFD_RELOC_16, R_MSP430_16_BYTE}, - {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL}, - {BFD_RELOC_MSP430_16, R_MSP430_16}, - {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE}, - {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE}, - {BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL}, - {BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL} - }; - -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 < ARRAY_SIZE (msp430_reloc_map); i++) - if (msp430_reloc_map[i].bfd_reloc_val == code) - return &elf_msp430_howto_table[msp430_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_msp430_howto_table) - / sizeof (elf_msp430_howto_table[0])); - i++) - if (elf_msp430_howto_table[i].name != NULL - && strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0) - return &elf_msp430_howto_table[i]; - - return NULL; -} - -/* Set the howto pointer for an MSP430 ELF reloc. */ - -static void -msp430_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_MSP430_max); - cache_ptr->howto = &elf_msp430_howto_table[r_type]; -} - -/* Look through the relocs for a section during the first phase. - Since we don't do .gots or .plts, we just need to consider the - virtual table relocs for gc. */ - -static bfd_boolean -elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info, - asection * sec, const Elf_Internal_Rela * relocs) -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - - if (info->relocatable) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - - rel_end = relocs + sec->reloc_count; - for (rel = relocs; rel < rel_end; rel++) - { - struct elf_link_hash_entry *h; - unsigned long r_symndx; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - } - } - - return TRUE; -} - -/* Perform a single relocation. By default we use the standard BFD - routines, but a few relocs, we have to do them ourselves. */ - -static bfd_reloc_status_type -msp430_final_link_relocate (reloc_howto_type * howto, bfd * input_bfd, - asection * input_section, bfd_byte * contents, - Elf_Internal_Rela * rel, bfd_vma relocation) -{ - bfd_reloc_status_type r = bfd_reloc_ok; - bfd_vma x; - bfd_signed_vma srel; - - switch (howto->type) - { - case R_MSP430_10_PCREL: - contents += rel->r_offset; - srel = (bfd_signed_vma) relocation; - srel += rel->r_addend; - srel -= rel->r_offset; - srel -= 2; /* Branch instructions add 2 to the PC... */ - srel -= (input_section->output_section->vma + - input_section->output_offset); - - if (srel & 1) - return bfd_reloc_outofrange; - - /* MSP430 addresses commands as words. */ - srel >>= 1; - - /* Check for an overflow. */ - if (srel < -512 || srel > 511) - return bfd_reloc_overflow; - - x = bfd_get_16 (input_bfd, contents); - x = (x & 0xfc00) | (srel & 0x3ff); - bfd_put_16 (input_bfd, x, contents); - break; - - case R_MSP430_2X_PCREL: - contents += rel->r_offset; - srel = (bfd_signed_vma) relocation; - srel += rel->r_addend; - srel -= rel->r_offset; - srel -= 2; /* Branch instructions add 2 to the PC... */ - srel -= (input_section->output_section->vma + - input_section->output_offset); - - if (srel & 1) - return bfd_reloc_outofrange; - - /* MSP430 addresses commands as words. */ - srel >>= 1; - - /* Check for an overflow. */ - if (srel < -512 || srel > 511) - return bfd_reloc_overflow; - - x = bfd_get_16 (input_bfd, contents); - x = (x & 0xfc00) | (srel & 0x3ff); - bfd_put_16 (input_bfd, x, contents); - /* Handle second jump instruction. */ - x = bfd_get_16 (input_bfd, contents - 2); - srel += 1; - x = (x & 0xfc00) | (srel & 0x3ff); - bfd_put_16 (input_bfd, x, contents - 2); - break; - - case R_MSP430_16_PCREL: - case R_MSP430_RL_PCREL: - contents += rel->r_offset; - srel = (bfd_signed_vma) relocation; - srel += rel->r_addend; - srel -= rel->r_offset; - /* Only branch instructions add 2 to the PC... */ - srel -= (input_section->output_section->vma + - input_section->output_offset); - - if (srel & 1) - return bfd_reloc_outofrange; - - bfd_put_16 (input_bfd, srel & 0xffff, contents); - break; - - case R_MSP430_16_PCREL_BYTE: - contents += rel->r_offset; - srel = (bfd_signed_vma) relocation; - srel += rel->r_addend; - srel -= rel->r_offset; - /* Only branch instructions add 2 to the PC... */ - srel -= (input_section->output_section->vma + - input_section->output_offset); - - bfd_put_16 (input_bfd, srel & 0xffff, contents); - break; - - case R_MSP430_16_BYTE: - contents += rel->r_offset; - srel = (bfd_signed_vma) relocation; - srel += rel->r_addend; - bfd_put_16 (input_bfd, srel & 0xffff, contents); - break; - - case R_MSP430_16: - contents += rel->r_offset; - srel = (bfd_signed_vma) relocation; - srel += rel->r_addend; - - if (srel & 1) - return bfd_reloc_notsupported; - - bfd_put_16 (input_bfd, srel & 0xffff, contents); - break; - - default: - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - } - - return r; -} - -/* Relocate an MSP430 ELF section. */ - -static bfd_boolean -elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, - 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) -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - Elf_Internal_Rela *rel; - Elf_Internal_Rela *relend; - - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (input_bfd); - relend = relocs + input_section->reloc_count; - - 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; - const char *name = NULL; - int r_type; - - r_type = ELF32_R_TYPE (rel->r_info); - r_symndx = ELF32_R_SYM (rel->r_info); - howto = elf_msp430_howto_table + 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); - - name = bfd_elf_string_from_elf_section - (input_bfd, symtab_hdr->sh_link, sym->st_name); - name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; - } - else - { - bfd_boolean unresolved_reloc, warned; - - RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, - r_symndx, symtab_hdr, sym_hashes, - h, sec, relocation, - unresolved_reloc, warned); - } - - if (sec != NULL && elf_discarded_section (sec)) - { - /* For relocs against symbols from removed linkonce sections, - or sections discarded by a linker script, we just want the - section contents zeroed. Avoid any special processing. */ - _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); - rel->r_info = 0; - rel->r_addend = 0; - continue; - } - - if (info->relocatable) - continue; - - r = msp430_final_link_relocate (howto, input_bfd, input_section, - contents, rel, relocation); - - if (r != bfd_reloc_ok) - { - const char *msg = (const char *) NULL; - - switch (r) - { - case bfd_reloc_overflow: - r = info->callbacks->reloc_overflow - (info, (h ? &h->root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, - rel->r_offset); - break; - - case bfd_reloc_undefined: - r = info->callbacks->undefined_symbol - (info, name, input_bfd, input_section, rel->r_offset, TRUE); - break; - - case bfd_reloc_outofrange: - msg = _("internal error: out of range error"); - break; - - case bfd_reloc_notsupported: - msg = _("internal error: unsupported relocation error"); - break; - - case bfd_reloc_dangerous: - msg = _("internal error: dangerous relocation"); - break; - - default: - msg = _("internal error: unknown error"); - break; - } - - if (msg) - r = info->callbacks->warning - (info, msg, name, input_bfd, input_section, rel->r_offset); - - if (!r) - return FALSE; - } - - } - - return TRUE; -} - -/* The final processing done just before writing out a MSP430 ELF object - file. This gets the MSP430 architecture right based on the machine - number. */ - -static void -bfd_elf_msp430_final_write_processing (bfd * abfd, - bfd_boolean linker ATTRIBUTE_UNUSED) -{ - unsigned long val; - - switch (bfd_get_mach (abfd)) - { - default: - case bfd_mach_msp110: - val = E_MSP430_MACH_MSP430x11x1; - break; - - case bfd_mach_msp11: - val = E_MSP430_MACH_MSP430x11; - break; - - case bfd_mach_msp12: - val = E_MSP430_MACH_MSP430x12; - break; - - case bfd_mach_msp13: - val = E_MSP430_MACH_MSP430x13; - break; - - case bfd_mach_msp14: - val = E_MSP430_MACH_MSP430x14; - break; - - case bfd_mach_msp15: - val = E_MSP430_MACH_MSP430x15; - break; - - case bfd_mach_msp16: - val = E_MSP430_MACH_MSP430x16; - break; - - case bfd_mach_msp31: - val = E_MSP430_MACH_MSP430x31; - break; - - case bfd_mach_msp32: - val = E_MSP430_MACH_MSP430x32; - break; - - case bfd_mach_msp33: - val = E_MSP430_MACH_MSP430x33; - break; - - case bfd_mach_msp41: - val = E_MSP430_MACH_MSP430x41; - break; - - case bfd_mach_msp42: - val = E_MSP430_MACH_MSP430x42; - break; - - case bfd_mach_msp43: - val = E_MSP430_MACH_MSP430x43; - break; - - case bfd_mach_msp44: - val = E_MSP430_MACH_MSP430x44; - break; - } - - elf_elfheader (abfd)->e_machine = EM_MSP430; - elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH; - elf_elfheader (abfd)->e_flags |= val; -} - -/* Set the right machine number. */ - -static bfd_boolean -elf32_msp430_object_p (bfd * abfd) -{ - int e_set = bfd_mach_msp14; - - if (elf_elfheader (abfd)->e_machine == EM_MSP430 - || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD) - { - int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH; - - switch (e_mach) - { - default: - case E_MSP430_MACH_MSP430x11: - e_set = bfd_mach_msp11; - break; - - case E_MSP430_MACH_MSP430x11x1: - e_set = bfd_mach_msp110; - break; - - case E_MSP430_MACH_MSP430x12: - e_set = bfd_mach_msp12; - break; - - case E_MSP430_MACH_MSP430x13: - e_set = bfd_mach_msp13; - break; - - case E_MSP430_MACH_MSP430x14: - e_set = bfd_mach_msp14; - break; - - case E_MSP430_MACH_MSP430x15: - e_set = bfd_mach_msp15; - break; - - case E_MSP430_MACH_MSP430x16: - e_set = bfd_mach_msp16; - break; - - case E_MSP430_MACH_MSP430x31: - e_set = bfd_mach_msp31; - break; - - case E_MSP430_MACH_MSP430x32: - e_set = bfd_mach_msp32; - break; - - case E_MSP430_MACH_MSP430x33: - e_set = bfd_mach_msp33; - break; - - case E_MSP430_MACH_MSP430x41: - e_set = bfd_mach_msp41; - break; - - case E_MSP430_MACH_MSP430x42: - e_set = bfd_mach_msp42; - break; - - case E_MSP430_MACH_MSP430x43: - e_set = bfd_mach_msp43; - break; - - case E_MSP430_MACH_MSP430x44: - e_set = bfd_mach_msp44; - break; - } - } - - return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set); -} - -/* These functions handle relaxing for the msp430. - Relaxation required only in two cases: - - Bad hand coding like jumps from one section to another or - from file to file. - - Sibling calls. This will affect onlu 'jump label' polymorph. Without - relaxing this enlarges code by 2 bytes. Sibcalls implemented but - do not work in gcc's port by the reason I do not know. - Anyway, if a relaxation required, user should pass -relax option to the - linker. - - There are quite a few relaxing opportunities available on the msp430: - - ================================================================ - - 1. 3 words -> 1 word - - eq == jeq label jne +4; br lab - ne != jne label jeq +4; br lab - lt < jl label jge +4; br lab - ltu < jlo label lhs +4; br lab - ge >= jge label jl +4; br lab - geu >= jhs label jlo +4; br lab - - 2. 4 words -> 1 word - - ltn < jn jn +2; jmp +4; br lab - - 3. 4 words -> 2 words - - gt > jeq +2; jge label jeq +6; jl +4; br label - gtu > jeq +2; jhs label jeq +6; jlo +4; br label - - 4. 4 words -> 2 words and 2 labels - - leu <= jeq label; jlo label jeq +2; jhs +4; br label - le <= jeq label; jl label jeq +2; jge +4; br label - ================================================================= - - codemap for first cases is (labels masked ): - eq: 0x2002,0x4010,0x0000 -> 0x2400 - ne: 0x2402,0x4010,0x0000 -> 0x2000 - lt: 0x3402,0x4010,0x0000 -> 0x3800 - ltu: 0x2c02,0x4010,0x0000 -> 0x2800 - ge: 0x3802,0x4010,0x0000 -> 0x3400 - geu: 0x2802,0x4010,0x0000 -> 0x2c00 - - second case: - ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000 - - third case: - gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400 - gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00 - - fourth case: - leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800 - le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800 - - Unspecified case :) - jump: 0x4010,0x0000 -> 0x3c00. */ - -#define NUMB_RELAX_CODES 12 -static struct rcodes_s -{ - int f0, f1; /* From code. */ - int t0, t1; /* To code. */ - int labels; /* Position of labels: 1 - one label at first - word, 2 - one at second word, 3 - two - labels at both. */ - int cdx; /* Words to match. */ - int bs; /* Shrink bytes. */ - int off; /* Offset from old label for new code. */ - int ncl; /* New code length. */ -} rcode[] = -{/* lab,cdx,bs,off,ncl */ - { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */ - { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */ - { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */ - { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */ - { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */ - { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */ - { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */ - { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */ - { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */ - { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */ - { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */ - { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */ - { 0, 0, 0, 0, 0, 0, 0, 0, 0} -}; - -/* Return TRUE if a symbol exists at the given address. */ - -static bfd_boolean -msp430_elf_symbol_address_p (bfd * abfd, - asection * sec, - Elf_Internal_Sym * isym, - bfd_vma addr) -{ - Elf_Internal_Shdr *symtab_hdr; - unsigned int sec_shndx; - Elf_Internal_Sym *isymend; - struct elf_link_hash_entry **sym_hashes; - struct elf_link_hash_entry **end_hashes; - unsigned int symcount; - - sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - /* Examine all the local symbols. */ - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) - if (isym->st_shndx == sec_shndx && isym->st_value == addr) - return TRUE; - - 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 - && sym_hash->root.u.def.value == addr) - return TRUE; - } - - return FALSE; -} - -/* Adjust all local symbols defined as '.section + 0xXXXX' (.section has sec_shndx) - referenced from current and other sections */ -static bfd_boolean -msp430_elf_relax_adjust_locals(bfd * abfd, asection * sec, bfd_vma addr, - int count, unsigned int sec_shndx, bfd_vma toaddr) -{ - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Rela *irel; - Elf_Internal_Rela *irelend; - Elf_Internal_Sym *isym; - - irel = elf_section_data (sec)->relocs; - irelend = irel + sec->reloc_count; - symtab_hdr = & elf_tdata (abfd)->symtab_hdr; - isym = (Elf_Internal_Sym *) symtab_hdr->contents; - - for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) - { - int sidx = ELF32_R_SYM(irel->r_info); - Elf_Internal_Sym *lsym = isym + sidx; - - /* Adjust symbols referenced by .sec+0xXX */ - if (irel->r_addend > addr && irel->r_addend < toaddr - && lsym->st_shndx == sec_shndx) - irel->r_addend -= count; - } - - return TRUE; -} - -/* Delete some bytes from a section while relaxing. */ - -static bfd_boolean -msp430_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; - Elf_Internal_Rela *irelend; - Elf_Internal_Rela *irelalign; - bfd_vma toaddr; - Elf_Internal_Sym *isym; - Elf_Internal_Sym *isymend; - struct elf_link_hash_entry **sym_hashes; - struct elf_link_hash_entry **end_hashes; - unsigned int symcount; - asection *p; - - sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - contents = elf_section_data (sec)->this_hdr.contents; - - /* The deletion must stop at the next ALIGN reloc for an aligment - power larger than the number of bytes we are deleting. */ - - irelalign = NULL; - toaddr = sec->size; - - irel = elf_section_data (sec)->relocs; - irelend = irel + sec->reloc_count; - - /* Actually delete the bytes. */ - memmove (contents + addr, contents + addr + count, - (size_t) (toaddr - addr - count)); - sec->size -= count; - - /* Adjust all the relocs. */ - symtab_hdr = & elf_tdata (abfd)->symtab_hdr; - isym = (Elf_Internal_Sym *) symtab_hdr->contents; - for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) - { - /* Get the new reloc address. */ - if ((irel->r_offset > addr && irel->r_offset < toaddr)) - irel->r_offset -= count; - } - - for (p = abfd->sections; p != NULL; p = p->next) - msp430_elf_relax_adjust_locals(abfd,p,addr,count,sec_shndx,toaddr); - - /* Adjust the local symbols defined in this section. */ - symtab_hdr = & elf_tdata (abfd)->symtab_hdr; - isym = (Elf_Internal_Sym *) symtab_hdr->contents; - for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) - if (isym->st_shndx == sec_shndx - && isym->st_value > addr && isym->st_value < toaddr) - isym->st_value -= 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 - && sym_hash->root.u.def.value > addr - && sym_hash->root.u.def.value < toaddr) - sym_hash->root.u.def.value -= count; - } - - return TRUE; -} - - -static bfd_boolean -msp430_elf_relax_section (bfd * abfd, asection * sec, - struct bfd_link_info * link_info, - bfd_boolean * 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 (link_info->relocatable - || (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; - - /* If this isn't something that can be relaxed, then ignore - this reloc. */ - if (ELF32_R_TYPE (irel->r_info) != (int) R_MSP430_RL_PCREL) - continue; - - /* 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. */ - - /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative - branch. */ - /* Paranoia? paranoia... */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL) - { - bfd_vma value = symval; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* See if the value will fit in 10 bits, note the high value is - 1016 as the target will be two bytes closer if we are - able to relax. */ - if ((long) value < 1016 && (long) value > -1016) - { - int code0 = 0, code1 = 0, code2 = 0; - int i; - struct rcodes_s *rx; - - /* Get the opcode. */ - if (irel->r_offset >= 6) - code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6); - - if (irel->r_offset >= 4) - code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4); - - code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2); - - if (code2 != 0x4010) - continue; - - /* Check r4 and r3. */ - for (i = NUMB_RELAX_CODES - 1; i >= 0; i--) - { - rx = &rcode[i]; - if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1) - break; - else if (rx->cdx == 1 && rx->f1 == code1) - break; - else if (rx->cdx == 0) /* This is an unconditional jump. */ - break; - } - - /* Check labels: - .Label0: ; we do not care about this label - jeq +6 - .Label1: ; make sure there is no label here - jl +4 - .Label2: ; make sure there is no label here - br .Label_dst - - So, if there is .Label1 or .Label2 we cannot relax this code. - This actually should not happen, cause for relaxable - instructions we use RL_PCREL reloc instead of 16_PCREL. - Will change this in the future. */ - - if (rx->cdx > 0 - && msp430_elf_symbol_address_p (abfd, sec, isymbuf, - irel->r_offset - 2)) - continue; - if (rx->cdx > 1 - && msp430_elf_symbol_address_p (abfd, sec, isymbuf, - irel->r_offset - 4)) - continue; - - /* Note that we've changed the relocs, section contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - elf_section_data (sec)->this_hdr.contents = contents; - symtab_hdr->contents = (unsigned char *) isymbuf; - - /* Fix the relocation's type. */ - if (rx->labels == 3) /* Handle special cases. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MSP430_2X_PCREL); - else - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MSP430_10_PCREL); - - /* Fix the opcode right way. */ - bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off); - if (rx->t1) - bfd_put_16 (abfd, rx->t1, - contents + irel->r_offset - rx->off + 2); - - /* Delete bytes. */ - if (!msp430_elf_relax_delete_bytes (abfd, sec, - irel->r_offset - rx->off + - rx->ncl, rx->bs)) - goto error_return; - - /* Handle unconditional jumps. */ - if (rx->cdx == 0) - irel->r_offset -= 2; - - /* 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 (internal_relocs != NULL - && elf_section_data (sec)->relocs != internal_relocs) - free (internal_relocs); - - return TRUE; - -error_return: - if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) - free (isymbuf); - if (contents != NULL - && elf_section_data (sec)->this_hdr.contents != contents) - free (contents); - if (internal_relocs != NULL - && elf_section_data (sec)->relocs != internal_relocs) - free (internal_relocs); - - return FALSE; -} - - -#define ELF_ARCH bfd_arch_msp430 -#define ELF_MACHINE_CODE EM_MSP430 -#define ELF_MACHINE_ALT1 EM_MSP430_OLD -#define ELF_MAXPAGESIZE 1 -#define ELF_OSABI ELFOSABI_STANDALONE - -#define TARGET_LITTLE_SYM bfd_elf32_msp430_vec -#define TARGET_LITTLE_NAME "elf32-msp430" - -#define elf_info_to_howto msp430_info_to_howto_rela -#define elf_info_to_howto_rel NULL -#define elf_backend_relocate_section elf32_msp430_relocate_section -#define elf_backend_check_relocs elf32_msp430_check_relocs -#define elf_backend_can_gc_sections 1 -#define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing -#define elf_backend_object_p elf32_msp430_object_p -#define elf_backend_post_process_headers _bfd_elf_set_osabi -#define bfd_elf32_bfd_relax_section msp430_elf_relax_section - -#include "elf32-target.h" |