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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [bfd/] [elf32-rx.c] - Rev 849
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/* Renesas RX specific support for 32-bit ELF. Copyright (C) 2008, 2009 Free Software Foundation, Inc. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "sysdep.h" #include "bfd.h" #include "libbfd.h" #include "elf-bfd.h" #include "elf/rx.h" #include "libiberty.h" #define RX_OPCODE_BIG_ENDIAN 0 #ifdef DEBUG char * rx_get_reloc (long); void dump_symtab (bfd *, void *, void *); #endif #define RXREL(n,sz,bit,shift,complain,pcrel) \ HOWTO (R_RX_##n, shift, sz, bit, pcrel, 0, complain_overflow_ ## complain, \ bfd_elf_generic_reloc, "R_RX_" #n, FALSE, 0, ~0, FALSE) /* Note that the relocations around 0x7f are internal to this file; feel free to move them as needed to avoid conflicts with published relocation numbers. */ static reloc_howto_type rx_elf_howto_table [] = { RXREL (NONE, 0, 0, 0, dont, FALSE), RXREL (DIR32, 2, 32, 0, signed, FALSE), RXREL (DIR24S, 2, 24, 0, signed, FALSE), RXREL (DIR16, 1, 16, 0, dont, FALSE), RXREL (DIR16U, 1, 16, 0, unsigned, FALSE), RXREL (DIR16S, 1, 16, 0, signed, FALSE), RXREL (DIR8, 0, 8, 0, dont, FALSE), RXREL (DIR8U, 0, 8, 0, unsigned, FALSE), RXREL (DIR8S, 0, 8, 0, signed, FALSE), RXREL (DIR24S_PCREL, 2, 24, 0, signed, TRUE), RXREL (DIR16S_PCREL, 1, 16, 0, signed, TRUE), RXREL (DIR8S_PCREL, 0, 8, 0, signed, TRUE), RXREL (DIR16UL, 1, 16, 2, unsigned, FALSE), RXREL (DIR16UW, 1, 16, 1, unsigned, FALSE), RXREL (DIR8UL, 0, 8, 2, unsigned, FALSE), RXREL (DIR8UW, 0, 8, 1, unsigned, FALSE), RXREL (DIR32_REV, 1, 16, 0, dont, FALSE), RXREL (DIR16_REV, 1, 16, 0, dont, FALSE), RXREL (DIR3U_PCREL, 0, 3, 0, dont, TRUE), EMPTY_HOWTO (0x13), EMPTY_HOWTO (0x14), EMPTY_HOWTO (0x15), EMPTY_HOWTO (0x16), EMPTY_HOWTO (0x17), EMPTY_HOWTO (0x18), EMPTY_HOWTO (0x19), EMPTY_HOWTO (0x1a), EMPTY_HOWTO (0x1b), EMPTY_HOWTO (0x1c), EMPTY_HOWTO (0x1d), EMPTY_HOWTO (0x1e), EMPTY_HOWTO (0x1f), RXREL (RH_3_PCREL, 0, 3, 0, signed, TRUE), RXREL (RH_16_OP, 1, 16, 0, signed, FALSE), RXREL (RH_24_OP, 2, 24, 0, signed, FALSE), RXREL (RH_32_OP, 2, 32, 0, signed, FALSE), RXREL (RH_24_UNS, 2, 24, 0, unsigned, FALSE), RXREL (RH_8_NEG, 0, 8, 0, signed, FALSE), RXREL (RH_16_NEG, 1, 16, 0, signed, FALSE), RXREL (RH_24_NEG, 2, 24, 0, signed, FALSE), RXREL (RH_32_NEG, 2, 32, 0, signed, FALSE), RXREL (RH_DIFF, 2, 32, 0, signed, FALSE), RXREL (RH_GPRELB, 1, 16, 0, unsigned, FALSE), RXREL (RH_GPRELW, 1, 16, 0, unsigned, FALSE), RXREL (RH_GPRELL, 1, 16, 0, unsigned, FALSE), RXREL (RH_RELAX, 0, 0, 0, dont, FALSE), EMPTY_HOWTO (0x2e), EMPTY_HOWTO (0x2f), EMPTY_HOWTO (0x30), EMPTY_HOWTO (0x31), EMPTY_HOWTO (0x32), EMPTY_HOWTO (0x33), EMPTY_HOWTO (0x34), EMPTY_HOWTO (0x35), EMPTY_HOWTO (0x36), EMPTY_HOWTO (0x37), EMPTY_HOWTO (0x38), EMPTY_HOWTO (0x39), EMPTY_HOWTO (0x3a), EMPTY_HOWTO (0x3b), EMPTY_HOWTO (0x3c), EMPTY_HOWTO (0x3d), EMPTY_HOWTO (0x3e), EMPTY_HOWTO (0x3f), EMPTY_HOWTO (0x40), RXREL (ABS32, 2, 32, 0, dont, FALSE), RXREL (ABS24S, 2, 24, 0, signed, FALSE), RXREL (ABS16, 1, 16, 0, dont, FALSE), RXREL (ABS16U, 1, 16, 0, unsigned, FALSE), RXREL (ABS16S, 1, 16, 0, signed, FALSE), RXREL (ABS8, 0, 8, 0, dont, FALSE), RXREL (ABS8U, 0, 8, 0, unsigned, FALSE), RXREL (ABS8S, 0, 8, 0, signed, FALSE), RXREL (ABS24S_PCREL, 2, 24, 0, signed, TRUE), RXREL (ABS16S_PCREL, 1, 16, 0, signed, TRUE), RXREL (ABS8S_PCREL, 0, 8, 0, signed, TRUE), RXREL (ABS16UL, 1, 16, 0, unsigned, FALSE), RXREL (ABS16UW, 1, 16, 0, unsigned, FALSE), RXREL (ABS8UL, 0, 8, 0, unsigned, FALSE), RXREL (ABS8UW, 0, 8, 0, unsigned, FALSE), RXREL (ABS32_REV, 2, 32, 0, dont, FALSE), RXREL (ABS16_REV, 1, 16, 0, dont, FALSE), #define STACK_REL_P(x) ((x) <= R_RX_ABS16_REV && (x) >= R_RX_ABS32) EMPTY_HOWTO (0x52), EMPTY_HOWTO (0x53), EMPTY_HOWTO (0x54), EMPTY_HOWTO (0x55), EMPTY_HOWTO (0x56), EMPTY_HOWTO (0x57), EMPTY_HOWTO (0x58), EMPTY_HOWTO (0x59), EMPTY_HOWTO (0x5a), EMPTY_HOWTO (0x5b), EMPTY_HOWTO (0x5c), EMPTY_HOWTO (0x5d), EMPTY_HOWTO (0x5e), EMPTY_HOWTO (0x5f), EMPTY_HOWTO (0x60), EMPTY_HOWTO (0x61), EMPTY_HOWTO (0x62), EMPTY_HOWTO (0x63), EMPTY_HOWTO (0x64), EMPTY_HOWTO (0x65), EMPTY_HOWTO (0x66), EMPTY_HOWTO (0x67), EMPTY_HOWTO (0x68), EMPTY_HOWTO (0x69), EMPTY_HOWTO (0x6a), EMPTY_HOWTO (0x6b), EMPTY_HOWTO (0x6c), EMPTY_HOWTO (0x6d), EMPTY_HOWTO (0x6e), EMPTY_HOWTO (0x6f), EMPTY_HOWTO (0x70), EMPTY_HOWTO (0x71), EMPTY_HOWTO (0x72), EMPTY_HOWTO (0x73), EMPTY_HOWTO (0x74), EMPTY_HOWTO (0x75), EMPTY_HOWTO (0x76), EMPTY_HOWTO (0x77), /* These are internal. */ /* A 5-bit unsigned displacement to a B/W/L address, at bit position 8/12. */ /* ---- ---- 4--- 3210. */ #define R_RX_RH_ABS5p8B 0x78 RXREL (RH_ABS5p8B, 0, 0, 0, dont, FALSE), #define R_RX_RH_ABS5p8W 0x79 RXREL (RH_ABS5p8W, 0, 0, 0, dont, FALSE), #define R_RX_RH_ABS5p8L 0x7a RXREL (RH_ABS5p8L, 0, 0, 0, dont, FALSE), /* A 5-bit unsigned displacement to a B/W/L address, at bit position 5/12. */ /* ---- -432 1--- 0---. */ #define R_RX_RH_ABS5p5B 0x7b RXREL (RH_ABS5p5B, 0, 0, 0, dont, FALSE), #define R_RX_RH_ABS5p5W 0x7c RXREL (RH_ABS5p5W, 0, 0, 0, dont, FALSE), #define R_RX_RH_ABS5p5L 0x7d RXREL (RH_ABS5p5L, 0, 0, 0, dont, FALSE), /* A 4-bit unsigned immediate at bit position 8. */ #define R_RX_RH_UIMM4p8 0x7e RXREL (RH_UIMM4p8, 0, 0, 0, dont, FALSE), /* A 4-bit negative unsigned immediate at bit position 8. */ #define R_RX_RH_UNEG4p8 0x7f RXREL (RH_UNEG4p8, 0, 0, 0, dont, FALSE), /* End of internal relocs. */ RXREL (SYM, 2, 32, 0, dont, FALSE), RXREL (OPneg, 2, 32, 0, dont, FALSE), RXREL (OPadd, 2, 32, 0, dont, FALSE), RXREL (OPsub, 2, 32, 0, dont, FALSE), RXREL (OPmul, 2, 32, 0, dont, FALSE), RXREL (OPdiv, 2, 32, 0, dont, FALSE), RXREL (OPshla, 2, 32, 0, dont, FALSE), RXREL (OPshra, 2, 32, 0, dont, FALSE), RXREL (OPsctsize, 2, 32, 0, dont, FALSE), RXREL (OPscttop, 2, 32, 0, dont, FALSE), RXREL (OPand, 2, 32, 0, dont, FALSE), RXREL (OPor, 2, 32, 0, dont, FALSE), RXREL (OPxor, 2, 32, 0, dont, FALSE), RXREL (OPnot, 2, 32, 0, dont, FALSE), RXREL (OPmod, 2, 32, 0, dont, FALSE), RXREL (OPromtop, 2, 32, 0, dont, FALSE), RXREL (OPramtop, 2, 32, 0, dont, FALSE) }; /* Map BFD reloc types to RX ELF reloc types. */ struct rx_reloc_map { bfd_reloc_code_real_type bfd_reloc_val; unsigned int rx_reloc_val; }; static const struct rx_reloc_map rx_reloc_map [] = { { BFD_RELOC_NONE, R_RX_NONE }, { BFD_RELOC_8, R_RX_DIR8S }, { BFD_RELOC_16, R_RX_DIR16S }, { BFD_RELOC_24, R_RX_DIR24S }, { BFD_RELOC_32, R_RX_DIR32 }, { BFD_RELOC_RX_16_OP, R_RX_DIR16 }, { BFD_RELOC_RX_DIR3U_PCREL, R_RX_DIR3U_PCREL }, { BFD_RELOC_8_PCREL, R_RX_DIR8S_PCREL }, { BFD_RELOC_16_PCREL, R_RX_DIR16S_PCREL }, { BFD_RELOC_24_PCREL, R_RX_DIR24S_PCREL }, { BFD_RELOC_RX_8U, R_RX_DIR8U }, { BFD_RELOC_RX_16U, R_RX_DIR16U }, { BFD_RELOC_RX_24U, R_RX_RH_24_UNS }, { BFD_RELOC_RX_NEG8, R_RX_RH_8_NEG }, { BFD_RELOC_RX_NEG16, R_RX_RH_16_NEG }, { BFD_RELOC_RX_NEG24, R_RX_RH_24_NEG }, { BFD_RELOC_RX_NEG32, R_RX_RH_32_NEG }, { BFD_RELOC_RX_DIFF, R_RX_RH_DIFF }, { BFD_RELOC_RX_GPRELB, R_RX_RH_GPRELB }, { BFD_RELOC_RX_GPRELW, R_RX_RH_GPRELW }, { BFD_RELOC_RX_GPRELL, R_RX_RH_GPRELL }, { BFD_RELOC_RX_RELAX, R_RX_RH_RELAX }, { BFD_RELOC_RX_SYM, R_RX_SYM }, { BFD_RELOC_RX_OP_SUBTRACT, R_RX_OPsub }, { BFD_RELOC_RX_ABS8, R_RX_ABS8 }, { BFD_RELOC_RX_ABS16, R_RX_ABS16 }, { BFD_RELOC_RX_ABS32, R_RX_ABS32 }, { BFD_RELOC_RX_ABS16UL, R_RX_ABS16UL }, { BFD_RELOC_RX_ABS16UW, R_RX_ABS16UW }, { BFD_RELOC_RX_ABS16U, R_RX_ABS16U } }; #define BIGE(abfd) ((abfd)->xvec->byteorder == BFD_ENDIAN_BIG) static reloc_howto_type * rx_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) { unsigned int i; if (code == BFD_RELOC_RX_32_OP) return rx_elf_howto_table + R_RX_DIR32; for (i = ARRAY_SIZE (rx_reloc_map); --i;) if (rx_reloc_map [i].bfd_reloc_val == code) return rx_elf_howto_table + rx_reloc_map[i].rx_reloc_val; return NULL; } static reloc_howto_type * rx_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, const char * r_name) { unsigned int i; for (i = 0; i < ARRAY_SIZE (rx_elf_howto_table); i++) if (rx_elf_howto_table[i].name != NULL && strcasecmp (rx_elf_howto_table[i].name, r_name) == 0) return rx_elf_howto_table + i; return NULL; } /* Set the howto pointer for an RX ELF reloc. */ static void rx_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_RX_max); cache_ptr->howto = rx_elf_howto_table + r_type; } static bfd_vma get_symbol_value (const char * name, bfd_reloc_status_type * status, struct bfd_link_info * info, bfd * input_bfd, asection * input_section, int offset) { bfd_vma value = 0; struct bfd_link_hash_entry * h; h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); if (h == NULL || (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)) * status = info->callbacks->undefined_symbol (info, name, input_bfd, input_section, offset, TRUE); else value = (h->u.def.value + h->u.def.section->output_section->vma + h->u.def.section->output_offset); return value; } static bfd_vma get_gp (bfd_reloc_status_type * status, struct bfd_link_info * info, bfd * abfd, asection * sec, int offset) { static bfd_boolean cached = FALSE; static bfd_vma cached_value = 0; if (!cached) { cached_value = get_symbol_value ("__gp", status, info, abfd, sec, offset); cached = TRUE; } return cached_value; } static bfd_vma get_romstart (bfd_reloc_status_type * status, struct bfd_link_info * info, bfd * abfd, asection * sec, int offset) { static bfd_boolean cached = FALSE; static bfd_vma cached_value = 0; if (!cached) { cached_value = get_symbol_value ("_start", status, info, abfd, sec, offset); cached = TRUE; } return cached_value; } static bfd_vma get_ramstart (bfd_reloc_status_type * status, struct bfd_link_info * info, bfd * abfd, asection * sec, int offset) { static bfd_boolean cached = FALSE; static bfd_vma cached_value = 0; if (!cached) { cached_value = get_symbol_value ("__datastart", status, info, abfd, sec, offset); cached = TRUE; } return cached_value; } #define NUM_STACK_ENTRIES 16 static int32_t rx_stack [ NUM_STACK_ENTRIES ]; static unsigned int rx_stack_top; #define RX_STACK_PUSH(val) \ do \ { \ if (rx_stack_top < NUM_STACK_ENTRIES) \ rx_stack [rx_stack_top ++] = (val); \ else \ r = bfd_reloc_dangerous; \ } \ while (0) #define RX_STACK_POP(dest) \ do \ { \ if (rx_stack_top > 0) \ (dest) = rx_stack [-- rx_stack_top]; \ else \ (dest) = 0, r = bfd_reloc_dangerous; \ } \ while (0) /* Relocate an RX ELF section. There is some attempt to make this function usable for many architectures, both USE_REL and USE_RELA ['twould be nice if such a critter existed], if only to serve as a learning tool. The RELOCATE_SECTION function is called by the new ELF backend linker to handle the relocations for a section. The relocs are always passed as Rela structures; if the section actually uses Rel structures, the r_addend field will always be zero. This function is responsible for adjusting the section contents as necessary, and (if using Rela relocs and generating a relocatable output file) adjusting the reloc addend as necessary. This function does not have to worry about setting the reloc address or the reloc symbol index. LOCAL_SYMS is a pointer to the swapped in local symbols. LOCAL_SECTIONS is an array giving the section in the input file corresponding to the st_shndx field of each local symbol. The global hash table entry for the global symbols can be found via elf_sym_hashes (input_bfd). When generating relocatable output, this function must handle STB_LOCAL/STT_SECTION symbols specially. The output symbol is going to be the section symbol corresponding to the output section, which means that the addend must be adjusted accordingly. */ static bfd_boolean rx_elf_relocate_section (bfd * output_bfd, 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; bfd * dynobj; asection * splt; symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; sym_hashes = elf_sym_hashes (input_bfd); relend = relocs + input_section->reloc_count; dynobj = elf_hash_table (info)->dynobj; splt = NULL; if (dynobj != NULL) splt = bfd_get_section_by_name (dynobj, ".plt"); 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; bfd_boolean unresolved_reloc = TRUE; int r_type; r_type = ELF32_R_TYPE (rel->r_info); r_symndx = ELF32_R_SYM (rel->r_info); howto = rx_elf_howto_table + ELF32_R_TYPE (rel->r_info); h = NULL; sym = NULL; sec = NULL; relocation = 0; 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 = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name; } else { bfd_boolean warned; RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, r_symndx, symtab_hdr, sym_hashes, h, sec, relocation, unresolved_reloc, warned); name = h->root.root.string; } 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) { /* This is a relocatable link. We don't have to change anything, unless the reloc is against a section symbol, in which case we have to adjust according to where the section symbol winds up in the output section. */ if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) rel->r_addend += sec->output_offset; continue; } if (h != NULL && h->root.type == bfd_link_hash_undefweak) /* If the symbol is undefined and weak then the relocation resolves to zero. */ relocation = 0; else { if (howto->pc_relative) { relocation -= (input_section->output_section->vma + input_section->output_offset + rel->r_offset); if (r_type != R_RX_RH_3_PCREL && r_type != R_RX_DIR3U_PCREL) relocation ++; } relocation += rel->r_addend; } r = bfd_reloc_ok; #define RANGE(a,b) if (a > (long) relocation || (long) relocation > b) r = bfd_reloc_overflow #define ALIGN(m) if (relocation & m) r = bfd_reloc_other; #define OP(i) (contents[rel->r_offset + (i)]) #define WARN_REDHAT(type) \ _bfd_error_handler (_("%B:%A: Warning: deprecated Red Hat reloc " type " detected against: %s."), \ input_bfd, input_section, name) /* Opcode relocs are always big endian. Data relocs are bi-endian. */ switch (r_type) { case R_RX_NONE: break; case R_RX_RH_RELAX: break; case R_RX_RH_3_PCREL: WARN_REDHAT ("RX_RH_3_PCREL"); RANGE (3, 10); OP (0) &= 0xf8; OP (0) |= relocation & 0x07; break; case R_RX_RH_8_NEG: WARN_REDHAT ("RX_RH_8_NEG"); relocation = - relocation; case R_RX_DIR8S_PCREL: RANGE (-128, 127); OP (0) = relocation; break; case R_RX_DIR8S: RANGE (-128, 255); OP (0) = relocation; break; case R_RX_DIR8U: RANGE (0, 255); OP (0) = relocation; break; case R_RX_RH_16_NEG: WARN_REDHAT ("RX_RH_16_NEG"); relocation = - relocation; case R_RX_DIR16S_PCREL: RANGE (-32768, 32767); #if RX_OPCODE_BIG_ENDIAN #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_RH_16_OP: WARN_REDHAT ("RX_RH_16_OP"); RANGE (-32768, 32767); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_DIR16S: RANGE (-32768, 65535); if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE)) { OP (1) = relocation; OP (0) = relocation >> 8; } else { OP (0) = relocation; OP (1) = relocation >> 8; } break; case R_RX_DIR16U: RANGE (0, 65536); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_DIR16: RANGE (-32768, 65536); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_DIR16_REV: RANGE (-32768, 65536); #if RX_OPCODE_BIG_ENDIAN OP (0) = relocation; OP (1) = relocation >> 8; #else OP (1) = relocation; OP (0) = relocation >> 8; #endif break; case R_RX_DIR3U_PCREL: RANGE (3, 10); OP (0) &= 0xf8; OP (0) |= relocation & 0x07; break; case R_RX_RH_24_NEG: WARN_REDHAT ("RX_RH_24_NEG"); relocation = - relocation; case R_RX_DIR24S_PCREL: RANGE (-0x800000, 0x7fffff); #if RX_OPCODE_BIG_ENDIAN OP (2) = relocation; OP (1) = relocation >> 8; OP (0) = relocation >> 16; #else OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; #endif break; case R_RX_RH_24_OP: WARN_REDHAT ("RX_RH_24_OP"); RANGE (-0x800000, 0x7fffff); #if RX_OPCODE_BIG_ENDIAN OP (2) = relocation; OP (1) = relocation >> 8; OP (0) = relocation >> 16; #else OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; #endif break; case R_RX_DIR24S: RANGE (-0x800000, 0x7fffff); if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE)) { OP (2) = relocation; OP (1) = relocation >> 8; OP (0) = relocation >> 16; } else { OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; } break; case R_RX_RH_24_UNS: WARN_REDHAT ("RX_RH_24_UNS"); RANGE (0, 0xffffff); #if RX_OPCODE_BIG_ENDIAN OP (2) = relocation; OP (1) = relocation >> 8; OP (0) = relocation >> 16; #else OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; #endif break; case R_RX_RH_32_NEG: WARN_REDHAT ("RX_RH_32_NEG"); relocation = - relocation; #if RX_OPCODE_BIG_ENDIAN OP (3) = relocation; OP (2) = relocation >> 8; OP (1) = relocation >> 16; OP (0) = relocation >> 24; #else OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; OP (3) = relocation >> 24; #endif break; case R_RX_RH_32_OP: WARN_REDHAT ("RX_RH_32_OP"); #if RX_OPCODE_BIG_ENDIAN OP (3) = relocation; OP (2) = relocation >> 8; OP (1) = relocation >> 16; OP (0) = relocation >> 24; #else OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; OP (3) = relocation >> 24; #endif break; case R_RX_DIR32: if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE)) { OP (3) = relocation; OP (2) = relocation >> 8; OP (1) = relocation >> 16; OP (0) = relocation >> 24; } else { OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; OP (3) = relocation >> 24; } break; case R_RX_DIR32_REV: if (BIGE (output_bfd)) { OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; OP (3) = relocation >> 24; } else { OP (3) = relocation; OP (2) = relocation >> 8; OP (1) = relocation >> 16; OP (0) = relocation >> 24; } break; case R_RX_RH_DIFF: { bfd_vma val; WARN_REDHAT ("RX_RH_DIFF"); val = bfd_get_32 (output_bfd, & OP (0)); val -= relocation; bfd_put_32 (output_bfd, val, & OP (0)); } break; case R_RX_RH_GPRELB: WARN_REDHAT ("RX_RH_GPRELB"); relocation -= get_gp (&r, info, input_bfd, input_section, rel->r_offset); RANGE (0, 65535); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_RH_GPRELW: WARN_REDHAT ("RX_RH_GPRELW"); relocation -= get_gp (&r, info, input_bfd, input_section, rel->r_offset); ALIGN (1); relocation >>= 1; RANGE (0, 65535); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_RH_GPRELL: WARN_REDHAT ("RX_RH_GPRELL"); relocation -= get_gp (&r, info, input_bfd, input_section, rel->r_offset); ALIGN (3); relocation >>= 2; RANGE (0, 65535); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; /* Internal relocations just for relaxation: */ case R_RX_RH_ABS5p5B: RX_STACK_POP (relocation); RANGE (0, 31); OP (0) &= 0xf8; OP (0) |= relocation >> 2; OP (1) &= 0x77; OP (1) |= (relocation << 6) & 0x80; OP (1) |= (relocation << 3) & 0x08; break; case R_RX_RH_ABS5p5W: RX_STACK_POP (relocation); RANGE (0, 62); ALIGN (1); relocation >>= 1; OP (0) &= 0xf8; OP (0) |= relocation >> 2; OP (1) &= 0x77; OP (1) |= (relocation << 6) & 0x80; OP (1) |= (relocation << 3) & 0x08; break; case R_RX_RH_ABS5p5L: RX_STACK_POP (relocation); RANGE (0, 124); ALIGN (3); relocation >>= 2; OP (0) &= 0xf8; OP (0) |= relocation >> 2; OP (1) &= 0x77; OP (1) |= (relocation << 6) & 0x80; OP (1) |= (relocation << 3) & 0x08; break; case R_RX_RH_ABS5p8B: RX_STACK_POP (relocation); RANGE (0, 31); OP (0) &= 0x70; OP (0) |= (relocation << 3) & 0x80; OP (0) |= relocation & 0x0f; break; case R_RX_RH_ABS5p8W: RX_STACK_POP (relocation); RANGE (0, 62); ALIGN (1); relocation >>= 1; OP (0) &= 0x70; OP (0) |= (relocation << 3) & 0x80; OP (0) |= relocation & 0x0f; break; case R_RX_RH_ABS5p8L: RX_STACK_POP (relocation); RANGE (0, 124); ALIGN (3); relocation >>= 2; OP (0) &= 0x70; OP (0) |= (relocation << 3) & 0x80; OP (0) |= relocation & 0x0f; break; case R_RX_RH_UIMM4p8: RANGE (0, 15); OP (0) &= 0x0f; OP (0) |= relocation << 4; break; case R_RX_RH_UNEG4p8: RANGE (-15, 0); OP (0) &= 0x0f; OP (0) |= (-relocation) << 4; break; /* Complex reloc handling: */ case R_RX_ABS32: RX_STACK_POP (relocation); #if RX_OPCODE_BIG_ENDIAN OP (3) = relocation; OP (2) = relocation >> 8; OP (1) = relocation >> 16; OP (0) = relocation >> 24; #else OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; OP (3) = relocation >> 24; #endif break; case R_RX_ABS32_REV: RX_STACK_POP (relocation); #if RX_OPCODE_BIG_ENDIAN OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; OP (3) = relocation >> 24; #else OP (3) = relocation; OP (2) = relocation >> 8; OP (1) = relocation >> 16; OP (0) = relocation >> 24; #endif break; case R_RX_ABS24S_PCREL: case R_RX_ABS24S: RX_STACK_POP (relocation); RANGE (-0x800000, 0x7fffff); if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE)) { OP (2) = relocation; OP (1) = relocation >> 8; OP (0) = relocation >> 16; } else { OP (0) = relocation; OP (1) = relocation >> 8; OP (2) = relocation >> 16; } break; case R_RX_ABS16: RX_STACK_POP (relocation); RANGE (-32768, 65535); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_ABS16_REV: RX_STACK_POP (relocation); RANGE (-32768, 65535); #if RX_OPCODE_BIG_ENDIAN OP (0) = relocation; OP (1) = relocation >> 8; #else OP (1) = relocation; OP (0) = relocation >> 8; #endif break; case R_RX_ABS16S_PCREL: case R_RX_ABS16S: RX_STACK_POP (relocation); RANGE (-32768, 32767); if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE)) { OP (1) = relocation; OP (0) = relocation >> 8; } else { OP (0) = relocation; OP (1) = relocation >> 8; } break; case R_RX_ABS16U: RX_STACK_POP (relocation); RANGE (0, 65536); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_ABS16UL: RX_STACK_POP (relocation); relocation >>= 2; RANGE (0, 65536); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_ABS16UW: RX_STACK_POP (relocation); relocation >>= 1; RANGE (0, 65536); #if RX_OPCODE_BIG_ENDIAN OP (1) = relocation; OP (0) = relocation >> 8; #else OP (0) = relocation; OP (1) = relocation >> 8; #endif break; case R_RX_ABS8: RX_STACK_POP (relocation); RANGE (-128, 255); OP (0) = relocation; break; case R_RX_ABS8U: RX_STACK_POP (relocation); RANGE (0, 255); OP (0) = relocation; break; case R_RX_ABS8UL: RX_STACK_POP (relocation); relocation >>= 2; RANGE (0, 255); OP (0) = relocation; break; case R_RX_ABS8UW: RX_STACK_POP (relocation); relocation >>= 1; RANGE (0, 255); OP (0) = relocation; break; case R_RX_ABS8S_PCREL: case R_RX_ABS8S: RX_STACK_POP (relocation); RANGE (-128, 127); OP (0) = relocation; break; case R_RX_SYM: if (r_symndx < symtab_hdr->sh_info) RX_STACK_PUSH (sec->output_section->vma + sec->output_offset + sym->st_value); else { if (h != NULL && (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak)) RX_STACK_PUSH (h->root.u.def.value + sec->output_section->vma + sec->output_offset); else _bfd_error_handler (_("Warning: RX_SYM reloc with an unknown symbol")); } break; case R_RX_OPneg: { int32_t tmp; RX_STACK_POP (tmp); tmp = - tmp; RX_STACK_PUSH (tmp); } break; case R_RX_OPadd: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 += tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPsub: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp2 -= tmp1; RX_STACK_PUSH (tmp2); } break; case R_RX_OPmul: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 *= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPdiv: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 /= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPshla: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 <<= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPshra: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 >>= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPsctsize: RX_STACK_PUSH (input_section->size); break; case R_RX_OPscttop: RX_STACK_PUSH (input_section->output_section->vma); break; case R_RX_OPand: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 &= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPor: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 |= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPxor: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 ^= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPnot: { int32_t tmp; RX_STACK_POP (tmp); tmp = ~ tmp; RX_STACK_PUSH (tmp); } break; case R_RX_OPmod: { int32_t tmp1, tmp2; RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 %= tmp2; RX_STACK_PUSH (tmp1); } break; case R_RX_OPromtop: RX_STACK_PUSH (get_romstart (&r, info, input_bfd, input_section, rel->r_offset)); break; case R_RX_OPramtop: RX_STACK_PUSH (get_ramstart (&r, info, input_bfd, input_section, rel->r_offset)); break; default: r = bfd_reloc_notsupported; break; } if (r != bfd_reloc_ok) { const char * msg = NULL; switch (r) { case bfd_reloc_overflow: /* Catch the case of a missing function declaration and emit a more helpful error message. */ if (r_type == R_RX_DIR24S_PCREL) msg = _("%B(%A): error: call to undefined function '%s'"); else 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_other: msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area"); break; case bfd_reloc_outofrange: msg = _("%B(%A): internal error: out of range error"); break; case bfd_reloc_notsupported: msg = _("%B(%A): internal error: unsupported relocation error"); break; case bfd_reloc_dangerous: msg = _("%B(%A): internal error: dangerous relocation"); break; default: msg = _("%B(%A): internal error: unknown error"); break; } if (msg) _bfd_error_handler (msg, input_bfd, input_section, name); if (! r) return FALSE; } } return TRUE; } /* Relaxation Support. */ /* Progression of relocations from largest operand size to smallest operand size. */ static int next_smaller_reloc (int r) { switch (r) { case R_RX_DIR32: return R_RX_DIR24S; case R_RX_DIR24S: return R_RX_DIR16S; case R_RX_DIR16S: return R_RX_DIR8S; case R_RX_DIR8S: return R_RX_NONE; case R_RX_DIR16: return R_RX_DIR8; case R_RX_DIR8: return R_RX_NONE; case R_RX_DIR16U: return R_RX_DIR8U; case R_RX_DIR8U: return R_RX_NONE; case R_RX_DIR24S_PCREL: return R_RX_DIR16S_PCREL; case R_RX_DIR16S_PCREL: return R_RX_DIR8S_PCREL; case R_RX_DIR8S_PCREL: return R_RX_DIR3U_PCREL; case R_RX_DIR16UL: return R_RX_DIR8UL; case R_RX_DIR8UL: return R_RX_NONE; case R_RX_DIR16UW: return R_RX_DIR8UW; case R_RX_DIR8UW: return R_RX_NONE; case R_RX_RH_32_OP: return R_RX_RH_24_OP; case R_RX_RH_24_OP: return R_RX_RH_16_OP; case R_RX_RH_16_OP: return R_RX_DIR8; case R_RX_ABS32: return R_RX_ABS24S; case R_RX_ABS24S: return R_RX_ABS16S; case R_RX_ABS16: return R_RX_ABS8; case R_RX_ABS16U: return R_RX_ABS8U; case R_RX_ABS16S: return R_RX_ABS8S; case R_RX_ABS8: return R_RX_NONE; case R_RX_ABS8U: return R_RX_NONE; case R_RX_ABS8S: return R_RX_NONE; case R_RX_ABS24S_PCREL: return R_RX_ABS16S_PCREL; case R_RX_ABS16S_PCREL: return R_RX_ABS8S_PCREL; case R_RX_ABS8S_PCREL: return R_RX_NONE; case R_RX_ABS16UL: return R_RX_ABS8UL; case R_RX_ABS16UW: return R_RX_ABS8UW; case R_RX_ABS8UL: return R_RX_NONE; case R_RX_ABS8UW: return R_RX_NONE; } return r; }; /* Delete some bytes from a section while relaxing. */ static bfd_boolean elf32_rx_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count, Elf_Internal_Rela *alignment_rel, int force_snip) { Elf_Internal_Shdr * symtab_hdr; unsigned int sec_shndx; bfd_byte * contents; Elf_Internal_Rela * irel; Elf_Internal_Rela * irelend; Elf_Internal_Rela * irelalign; Elf_Internal_Sym * isym; Elf_Internal_Sym * isymend; bfd_vma toaddr; unsigned int symcount; struct elf_link_hash_entry ** sym_hashes; struct elf_link_hash_entry ** end_hashes; if (!alignment_rel) force_snip = 1; 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 alignment boundary, if ALIGNMENT_REL is non-NULL. */ irelalign = NULL; toaddr = sec->size; if (alignment_rel) toaddr = alignment_rel->r_offset; 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)); /* If we don't have an alignment marker to worry about, we can just shrink the section. Otherwise, we have to fill in the newly created gap with NOP insns (0x03). */ if (force_snip) sec->size -= count; else memset (contents + toaddr - count, 0x03, count); /* Adjust all the relocs. */ for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) { /* Get the new reloc address. */ if (irel->r_offset > addr && (irel->r_offset < toaddr || (force_snip && irel->r_offset == toaddr))) irel->r_offset -= count; /* If we see an ALIGN marker at the end of the gap, we move it to the beginning of the gap, since marking these gaps is what they're for. */ if (irel->r_offset == toaddr && ELF32_R_TYPE (irel->r_info) == R_RX_RH_RELAX && irel->r_addend & RX_RELAXA_ALIGN) irel->r_offset -= count; } /* Adjust the local symbols defined in this section. */ symtab_hdr = &elf_tdata (abfd)->symtab_hdr; isym = (Elf_Internal_Sym *) symtab_hdr->contents; isymend = isym + symtab_hdr->sh_info; for (; isym < isymend; isym++) { /* If the symbol is in the range of memory we just moved, we have to adjust its value. */ if (isym->st_shndx == sec_shndx && isym->st_value > addr && isym->st_value < toaddr) isym->st_value -= count; /* If the symbol *spans* the bytes we just deleted (i.e. it's *end* is in the moved bytes but it's *start* isn't), then we must adjust its size. */ if (isym->st_shndx == sec_shndx && isym->st_value < addr && isym->st_value + isym->st_size > addr && isym->st_value + isym->st_size < toaddr) isym->st_size -= 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) { /* As above, adjust the value if needed. */ if (sym_hash->root.u.def.value > addr && sym_hash->root.u.def.value < toaddr) sym_hash->root.u.def.value -= count; /* As above, adjust the size if needed. */ if (sym_hash->root.u.def.value < addr && sym_hash->root.u.def.value + sym_hash->size > addr && sym_hash->root.u.def.value + sym_hash->size < toaddr) sym_hash->size -= count; } } return TRUE; } /* Used to sort relocs by address. If relocs have the same address, we maintain their relative order, except that R_RX_RH_RELAX alignment relocs must be the first reloc for any given address. */ static void reloc_bubblesort (Elf_Internal_Rela * r, int count) { int i; bfd_boolean again; bfd_boolean swappit; /* This is almost a classic bubblesort. It's the slowest sort, but we're taking advantage of the fact that the relocations are mostly in order already (the assembler emits them that way) and we need relocs with the same address to remain in the same relative order. */ again = TRUE; while (again) { again = FALSE; for (i = 0; i < count - 1; i ++) { if (r[i].r_offset > r[i + 1].r_offset) swappit = TRUE; else if (r[i].r_offset < r[i + 1].r_offset) swappit = FALSE; else if (ELF32_R_TYPE (r[i + 1].r_info) == R_RX_RH_RELAX && (r[i + 1].r_addend & RX_RELAXA_ALIGN)) swappit = TRUE; else if (ELF32_R_TYPE (r[i + 1].r_info) == R_RX_RH_RELAX && (r[i + 1].r_addend & RX_RELAXA_ELIGN) && !(ELF32_R_TYPE (r[i].r_info) == R_RX_RH_RELAX && (r[i].r_addend & RX_RELAXA_ALIGN))) swappit = TRUE; else swappit = FALSE; if (swappit) { Elf_Internal_Rela tmp; tmp = r[i]; r[i] = r[i + 1]; r[i + 1] = tmp; /* If we do move a reloc back, re-scan to see if it needs to be moved even further back. This avoids most of the O(n^2) behavior for our cases. */ if (i > 0) i -= 2; again = TRUE; } } } } #define OFFSET_FOR_RELOC(rel, lrel, scale) \ rx_offset_for_reloc (abfd, rel + 1, symtab_hdr, shndx_buf, intsyms, \ lrel, abfd, sec, link_info, scale) static bfd_vma rx_offset_for_reloc (bfd * abfd, Elf_Internal_Rela * rel, Elf_Internal_Shdr * symtab_hdr, Elf_External_Sym_Shndx * shndx_buf, Elf_Internal_Sym * intsyms, Elf_Internal_Rela ** lrel, bfd * input_bfd, asection * input_section, struct bfd_link_info * info, int * scale) { bfd_vma symval; bfd_reloc_status_type r; *scale = 1; /* REL is the first of 1..N relocations. We compute the symbol value for each relocation, then combine them if needed. LREL gets a pointer to the last relocation used. */ while (1) { int32_t tmp1, tmp2; /* Get the value of the symbol referred to by the reloc. */ if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info) { /* A local symbol. */ Elf_Internal_Sym *isym; Elf_External_Sym_Shndx *shndx; asection *ssec; isym = intsyms + ELF32_R_SYM (rel->r_info); if (isym->st_shndx == SHN_UNDEF) ssec = bfd_und_section_ptr; else if (isym->st_shndx == SHN_ABS) ssec = bfd_abs_section_ptr; else if (isym->st_shndx == SHN_COMMON) ssec = bfd_com_section_ptr; else ssec = bfd_section_from_elf_index (abfd, isym->st_shndx); shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (rel->r_info) : 0); /* Initial symbol value. */ symval = isym->st_value; /* GAS may have made this symbol relative to a section, in which case, we have to add the addend to find the symbol. */ if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) symval += rel->r_addend; if (ssec) { if ((ssec->flags & SEC_MERGE) && ssec->sec_info_type == ELF_INFO_TYPE_MERGE) symval = _bfd_merged_section_offset (abfd, & ssec, elf_section_data (ssec)->sec_info, symval); } /* Now make the offset relative to where the linker is putting it. */ if (ssec) symval += ssec->output_section->vma + ssec->output_offset; symval += rel->r_addend; } else { unsigned long indx; struct elf_link_hash_entry * h; /* An external symbol. */ indx = ELF32_R_SYM (rel->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. */ if (lrel) *lrel = rel; return 0; } symval = (h->root.u.def.value + h->root.u.def.section->output_section->vma + h->root.u.def.section->output_offset); symval += rel->r_addend; } switch (ELF32_R_TYPE (rel->r_info)) { case R_RX_SYM: RX_STACK_PUSH (symval); break; case R_RX_OPneg: RX_STACK_POP (tmp1); tmp1 = - tmp1; RX_STACK_PUSH (tmp1); break; case R_RX_OPadd: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 += tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPsub: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp2 -= tmp1; RX_STACK_PUSH (tmp2); break; case R_RX_OPmul: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 *= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPdiv: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 /= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPshla: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 <<= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPshra: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 >>= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPsctsize: RX_STACK_PUSH (input_section->size); break; case R_RX_OPscttop: RX_STACK_PUSH (input_section->output_section->vma); break; case R_RX_OPand: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 &= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPor: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 |= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPxor: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 ^= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPnot: RX_STACK_POP (tmp1); tmp1 = ~ tmp1; RX_STACK_PUSH (tmp1); break; case R_RX_OPmod: RX_STACK_POP (tmp1); RX_STACK_POP (tmp2); tmp1 %= tmp2; RX_STACK_PUSH (tmp1); break; case R_RX_OPromtop: RX_STACK_PUSH (get_romstart (&r, info, input_bfd, input_section, rel->r_offset)); break; case R_RX_OPramtop: RX_STACK_PUSH (get_ramstart (&r, info, input_bfd, input_section, rel->r_offset)); break; case R_RX_DIR16UL: case R_RX_DIR8UL: case R_RX_ABS16UL: case R_RX_ABS8UL: if (rx_stack_top) RX_STACK_POP (symval); if (lrel) *lrel = rel; *scale = 4; return symval; case R_RX_DIR16UW: case R_RX_DIR8UW: case R_RX_ABS16UW: case R_RX_ABS8UW: if (rx_stack_top) RX_STACK_POP (symval); if (lrel) *lrel = rel; *scale = 2; return symval; default: if (rx_stack_top) RX_STACK_POP (symval); if (lrel) *lrel = rel; return symval; } rel ++; } } static void move_reloc (Elf_Internal_Rela * irel, Elf_Internal_Rela * srel, int delta) { bfd_vma old_offset = srel->r_offset; irel ++; while (irel <= srel) { if (irel->r_offset == old_offset) irel->r_offset += delta; irel ++; } } /* Relax one section. */ static bfd_boolean elf32_rx_relax_section (bfd * abfd, asection * sec, struct bfd_link_info * link_info, bfd_boolean * again, bfd_boolean allow_pcrel3) { Elf_Internal_Shdr * symtab_hdr; Elf_Internal_Shdr * shndx_hdr; Elf_Internal_Rela * internal_relocs; Elf_Internal_Rela * free_relocs = NULL; Elf_Internal_Rela * irel; Elf_Internal_Rela * srel; Elf_Internal_Rela * irelend; Elf_Internal_Rela * next_alignment; Elf_Internal_Rela * prev_alignment; bfd_byte * contents = NULL; bfd_byte * free_contents = NULL; Elf_Internal_Sym * intsyms = NULL; Elf_Internal_Sym * free_intsyms = NULL; Elf_External_Sym_Shndx * shndx_buf = NULL; bfd_vma pc; bfd_vma sec_start; bfd_vma sec_end; bfd_vma symval = 0; int pcrel = 0; int code = 0; int section_alignment_glue; /* how much to scale the relocation by - 1, 2, or 4. */ int scale; /* 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; shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; sec_start = sec->output_section->vma + sec->output_offset; sec_end = sec->output_section->vma + sec->output_offset + sec->size; /* Get the section contents. */ if (elf_section_data (sec)->this_hdr.contents != NULL) contents = elf_section_data (sec)->this_hdr.contents; /* Go get them off disk. */ else { if (! bfd_malloc_and_get_section (abfd, sec, &contents)) goto error_return; elf_section_data (sec)->this_hdr.contents = contents; } /* Read this BFD's symbols. */ /* Get cached copy if it exists. */ if (symtab_hdr->contents != NULL) intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; else { intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL); symtab_hdr->contents = (bfd_byte *) intsyms; } if (shndx_hdr->sh_size != 0) { bfd_size_type amt; amt = symtab_hdr->sh_info; amt *= sizeof (Elf_External_Sym_Shndx); shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); if (shndx_buf == NULL) goto error_return; if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt) goto error_return; shndx_hdr->contents = (bfd_byte *) shndx_buf; } /* Get a copy of the native relocations. */ internal_relocs = (_bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, link_info->keep_memory)); if (internal_relocs == NULL) goto error_return; if (! link_info->keep_memory) free_relocs = internal_relocs; /* The RL_ relocs must be just before the operand relocs they go with, so we must sort them to guarantee this. We use bubblesort instead of qsort so we can guarantee that relocs with the same address remain in the same relative order. */ reloc_bubblesort (internal_relocs, sec->reloc_count); /* Walk through them looking for relaxing opportunities. */ irelend = internal_relocs + sec->reloc_count; /* This will either be NULL or a pointer to the next alignment relocation. */ next_alignment = internal_relocs; /* This will be the previous alignment, although at first it points to the first real relocation. */ prev_alignment = internal_relocs; /* We calculate worst case shrinkage caused by alignment directives. No fool-proof, but better than either ignoring the problem or doing heavy duty analysis of all the alignment markers in all input sections. */ section_alignment_glue = 0; for (irel = internal_relocs; irel < irelend; irel++) if (ELF32_R_TYPE (irel->r_info) == R_RX_RH_RELAX && irel->r_addend & RX_RELAXA_ALIGN) { int this_glue = 1 << (irel->r_addend & RX_RELAXA_ANUM); if (section_alignment_glue < this_glue) section_alignment_glue = this_glue; } /* Worst case is all 0..N alignments, in order, causing 2*N-1 byte shrinkage. */ section_alignment_glue *= 2; for (irel = internal_relocs; irel < irelend; irel++) { unsigned char *insn; int nrelocs; /* The insns we care about are all marked with one of these. */ if (ELF32_R_TYPE (irel->r_info) != R_RX_RH_RELAX) continue; if (irel->r_addend & RX_RELAXA_ALIGN || next_alignment == internal_relocs) { /* When we delete bytes, we need to maintain all the alignments indicated. In addition, we need to be careful about relaxing jumps across alignment boundaries - these displacements *grow* when we delete bytes. For now, don't shrink displacements across an alignment boundary, just in case. Note that this only affects relocations to the same section. */ prev_alignment = next_alignment; next_alignment += 2; while (next_alignment < irelend && (ELF32_R_TYPE (next_alignment->r_info) != R_RX_RH_RELAX || !(next_alignment->r_addend & RX_RELAXA_ELIGN))) next_alignment ++; if (next_alignment >= irelend || next_alignment->r_offset == 0) next_alignment = NULL; } /* When we hit alignment markers, see if we've shrunk enough before them to reduce the gap without violating the alignment requirements. */ if (irel->r_addend & RX_RELAXA_ALIGN) { /* At this point, the next relocation *should* be the ELIGN end marker. */ Elf_Internal_Rela *erel = irel + 1; unsigned int alignment, nbytes; if (ELF32_R_TYPE (erel->r_info) != R_RX_RH_RELAX) continue; if (!(erel->r_addend & RX_RELAXA_ELIGN)) continue; alignment = 1 << (irel->r_addend & RX_RELAXA_ANUM); if (erel->r_offset - irel->r_offset < alignment) continue; nbytes = erel->r_offset - irel->r_offset; nbytes /= alignment; nbytes *= alignment; elf32_rx_relax_delete_bytes (abfd, sec, erel->r_offset-nbytes, nbytes, next_alignment, erel->r_offset == sec->size); *again = TRUE; continue; } if (irel->r_addend & RX_RELAXA_ELIGN) continue; insn = contents + irel->r_offset; nrelocs = irel->r_addend & RX_RELAXA_RNUM; /* At this point, we have an insn that is a candidate for linker relaxation. There are NRELOCS relocs following that may be relaxed, although each reloc may be made of more than one reloc entry (such as gp-rel symbols). */ /* Get the value of the symbol referred to by the reloc. Just in case this is the last reloc in the list, use the RL's addend to choose between this reloc (no addend) or the next (yes addend, which means at least one following reloc). */ /* srel points to the "current" reloction for this insn - actually the last reloc for a given operand, which is the one we need to update. We check the relaxations in the same order that the relocations happen, so we'll just push it along as we go. */ srel = irel; pc = sec->output_section->vma + sec->output_offset + srel->r_offset; #define GET_RELOC \ symval = OFFSET_FOR_RELOC (srel, &srel, &scale); \ pcrel = symval - pc + srel->r_addend; \ nrelocs --; #define SNIPNR(offset, nbytes) \ elf32_rx_relax_delete_bytes (abfd, sec, (insn - contents) + offset, nbytes, next_alignment, 0); #define SNIP(offset, nbytes, newtype) \ SNIPNR (offset, nbytes); \ srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), newtype) /* The order of these bit tests must match the order that the relocs appear in. Since we sorted those by offset, we can predict them. */ /* Note that the numbers in, say, DSP6 are the bit offsets of the code fields that describe the operand. Bits number 0 for the MSB of insn[0]. */ /* DSP* codes: 0 00 [reg] 1 01 dsp:8[reg] 2 10 dsp:16[reg] 3 11 reg */ if (irel->r_addend & RX_RELAXA_DSP6) { GET_RELOC; code = insn[0] & 3; if (code == 2 && symval/scale <= 255) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[0] &= 0xfc; insn[0] |= 0x01; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (3, 1, newrel); *again = TRUE; } } else if (code == 1 && symval == 0) { insn[0] &= 0xfc; SNIP (2, 1, R_RX_NONE); *again = TRUE; } /* Special case DSP:5 format: MOV.bwl dsp:5[Rsrc],Rdst. */ else if (code == 1 && symval/scale <= 31 /* Decodable bits. */ && (insn[0] & 0xcc) == 0xcc /* Width. */ && (insn[0] & 0x30) != 3 /* Register MSBs. */ && (insn[1] & 0x88) == 0x00) { int newrel = 0; insn[0] = 0x88 | (insn[0] & 0x30); /* The register fields are in the right place already. */ /* We can't relax this new opcode. */ irel->r_addend = 0; switch ((insn[0] & 0x30) >> 4) { case 0: newrel = R_RX_RH_ABS5p5B; break; case 1: newrel = R_RX_RH_ABS5p5W; break; case 2: newrel = R_RX_RH_ABS5p5L; break; } move_reloc (irel, srel, -2); SNIP (2, 1, newrel); } /* Special case DSP:5 format: MOVU.bw dsp:5[Rsrc],Rdst. */ else if (code == 1 && symval/scale <= 31 /* Decodable bits. */ && (insn[0] & 0xf8) == 0x58 /* Register MSBs. */ && (insn[1] & 0x88) == 0x00) { int newrel = 0; insn[0] = 0xb0 | ((insn[0] & 0x04) << 1); /* The register fields are in the right place already. */ /* We can't relax this new opcode. */ irel->r_addend = 0; switch ((insn[0] & 0x08) >> 3) { case 0: newrel = R_RX_RH_ABS5p5B; break; case 1: newrel = R_RX_RH_ABS5p5W; break; } move_reloc (irel, srel, -2); SNIP (2, 1, newrel); } } /* A DSP4 operand always follows a DSP6 operand, even if there's no relocation for it. We have to read the code out of the opcode to calculate the offset of the operand. */ if (irel->r_addend & RX_RELAXA_DSP4) { int code6, offset = 0; GET_RELOC; code6 = insn[0] & 0x03; switch (code6) { case 0: offset = 2; break; case 1: offset = 3; break; case 2: offset = 4; break; case 3: offset = 2; break; } code = (insn[0] & 0x0c) >> 2; if (code == 2 && symval / scale <= 255) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[0] &= 0xf3; insn[0] |= 0x04; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (offset+1, 1, newrel); *again = TRUE; } } else if (code == 1 && symval == 0) { insn[0] &= 0xf3; SNIP (offset, 1, R_RX_NONE); *again = TRUE; } /* Special case DSP:5 format: MOV.bwl Rsrc,dsp:5[Rdst] */ else if (code == 1 && symval/scale <= 31 /* Decodable bits. */ && (insn[0] & 0xc3) == 0xc3 /* Width. */ && (insn[0] & 0x30) != 3 /* Register MSBs. */ && (insn[1] & 0x88) == 0x00) { int newrel = 0; insn[0] = 0x80 | (insn[0] & 0x30); /* The register fields are in the right place already. */ /* We can't relax this new opcode. */ irel->r_addend = 0; switch ((insn[0] & 0x30) >> 4) { case 0: newrel = R_RX_RH_ABS5p5B; break; case 1: newrel = R_RX_RH_ABS5p5W; break; case 2: newrel = R_RX_RH_ABS5p5L; break; } move_reloc (irel, srel, -2); SNIP (2, 1, newrel); } } /* These always occur alone, but the offset depends on whether it's a MEMEX opcode (0x06) or not. */ if (irel->r_addend & RX_RELAXA_DSP14) { int offset; GET_RELOC; if (insn[0] == 0x06) offset = 3; else offset = 4; code = insn[1] & 3; if (code == 2 && symval / scale <= 255) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[1] &= 0xfc; insn[1] |= 0x01; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (offset, 1, newrel); *again = TRUE; } } else if (code == 1 && symval == 0) { insn[1] &= 0xfc; SNIP (offset, 1, R_RX_NONE); *again = TRUE; } } /* IMM* codes: 0 00 imm:32 1 01 simm:8 2 10 simm:16 3 11 simm:24. */ /* These always occur alone. */ if (irel->r_addend & RX_RELAXA_IMM6) { long ssymval; GET_RELOC; /* These relocations sign-extend, so we must do signed compares. */ ssymval = (long) symval; code = insn[0] & 0x03; if (code == 0 && ssymval <= 8388607 && ssymval >= -8388608) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[0] &= 0xfc; insn[0] |= 0x03; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (2, 1, newrel); *again = TRUE; } } else if (code == 3 && ssymval <= 32767 && ssymval >= -32768) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[0] &= 0xfc; insn[0] |= 0x02; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (2, 1, newrel); *again = TRUE; } } /* Special case UIMM8 format: CMP #uimm8,Rdst. */ else if (code == 2 && ssymval <= 255 && ssymval >= 16 /* Decodable bits. */ && (insn[0] & 0xfc) == 0x74 /* Decodable bits. */ && ((insn[1] & 0xf0) == 0x00)) { int newrel; insn[0] = 0x75; insn[1] = 0x50 | (insn[1] & 0x0f); /* We can't relax this new opcode. */ irel->r_addend = 0; if (STACK_REL_P (ELF32_R_TYPE (srel->r_info))) newrel = R_RX_ABS8U; else newrel = R_RX_DIR8U; SNIP (2, 1, newrel); *again = TRUE; } else if (code == 2 && ssymval <= 127 && ssymval >= -128) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[0] &= 0xfc; insn[0] |= 0x01; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (2, 1, newrel); *again = TRUE; } } /* Special case UIMM4 format: CMP, MUL, AND, OR. */ else if (code == 1 && ssymval <= 15 && ssymval >= 0 /* Decodable bits and immediate type. */ && insn[0] == 0x75 /* Decodable bits. */ && (insn[1] & 0xc0) == 0x00) { static const int newop[4] = { 1, 3, 4, 5 }; insn[0] = 0x60 | newop[insn[1] >> 4]; /* The register number doesn't move. */ /* We can't relax this new opcode. */ irel->r_addend = 0; move_reloc (irel, srel, -1); SNIP (2, 1, R_RX_RH_UIMM4p8); *again = TRUE; } /* Special case UIMM4 format: ADD -> ADD/SUB. */ else if (code == 1 && ssymval <= 15 && ssymval >= -15 /* Decodable bits and immediate type. */ && insn[0] == 0x71 /* Same register for source and destination. */ && ((insn[1] >> 4) == (insn[1] & 0x0f))) { int newrel; /* Note that we can't turn "add $0,Rs" into a NOP because the flags need to be set right. */ if (ssymval < 0) { insn[0] = 0x60; /* Subtract. */ newrel = R_RX_RH_UNEG4p8; } else { insn[0] = 0x62; /* Add. */ newrel = R_RX_RH_UIMM4p8; } /* The register number is in the right place. */ /* We can't relax this new opcode. */ irel->r_addend = 0; move_reloc (irel, srel, -1); SNIP (2, 1, newrel); *again = TRUE; } } /* These are either matched with a DSP6 (2-byte base) or an id24 (3-byte base). */ if (irel->r_addend & RX_RELAXA_IMM12) { int dspcode, offset = 0; long ssymval; GET_RELOC; if ((insn[0] & 0xfc) == 0xfc) dspcode = 1; /* Just something with one byte operand. */ else dspcode = insn[0] & 3; switch (dspcode) { case 0: offset = 2; break; case 1: offset = 3; break; case 2: offset = 4; break; case 3: offset = 2; break; } /* These relocations sign-extend, so we must do signed compares. */ ssymval = (long) symval; code = (insn[1] >> 2) & 3; if (code == 0 && ssymval <= 8388607 && ssymval >= -8388608) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[1] &= 0xf3; insn[1] |= 0x0c; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (offset, 1, newrel); *again = TRUE; } } else if (code == 3 && ssymval <= 32767 && ssymval >= -32768) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); insn[1] &= 0xf3; insn[1] |= 0x08; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE (srel->r_info)) { SNIP (offset, 1, newrel); *again = TRUE; } } /* Special case UIMM8 format: MOV #uimm8,Rdst. */ else if (code == 2 && ssymval <= 255 && ssymval >= 16 /* Decodable bits. */ && insn[0] == 0xfb /* Decodable bits. */ && ((insn[1] & 0x03) == 0x02)) { int newrel; insn[0] = 0x75; insn[1] = 0x40 | (insn[1] >> 4); /* We can't relax this new opcode. */ irel->r_addend = 0; if (STACK_REL_P (ELF32_R_TYPE (srel->r_info))) newrel = R_RX_ABS8U; else newrel = R_RX_DIR8U; SNIP (2, 1, newrel); *again = TRUE; } else if (code == 2 && ssymval <= 127 && ssymval >= -128) { unsigned int newrel = ELF32_R_TYPE(srel->r_info); insn[1] &= 0xf3; insn[1] |= 0x04; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); if (newrel != ELF32_R_TYPE(srel->r_info)) { SNIP (offset, 1, newrel); *again = TRUE; } } /* Special case UIMM4 format: MOV #uimm4,Rdst. */ else if (code == 1 && ssymval <= 15 && ssymval >= 0 /* Decodable bits. */ && insn[0] == 0xfb /* Decodable bits. */ && ((insn[1] & 0x03) == 0x02)) { insn[0] = 0x66; insn[1] = insn[1] >> 4; /* We can't relax this new opcode. */ irel->r_addend = 0; move_reloc (irel, srel, -1); SNIP (2, 1, R_RX_RH_UIMM4p8); *again = TRUE; } } if (irel->r_addend & RX_RELAXA_BRA) { unsigned int newrel = ELF32_R_TYPE (srel->r_info); int max_pcrel3 = 4; int alignment_glue = 0; GET_RELOC; /* Branches over alignment chunks are problematic, as deleting bytes here makes the branch *further* away. We can be agressive with branches within this alignment block, but not branches outside it. */ if ((prev_alignment == NULL || symval < (bfd_vma)(sec_start + prev_alignment->r_offset)) && (next_alignment == NULL || symval > (bfd_vma)(sec_start + next_alignment->r_offset))) alignment_glue = section_alignment_glue; if (ELF32_R_TYPE(srel[1].r_info) == R_RX_RH_RELAX && srel[1].r_addend & RX_RELAXA_BRA && srel[1].r_offset < irel->r_offset + pcrel) max_pcrel3 ++; newrel = next_smaller_reloc (ELF32_R_TYPE (srel->r_info)); /* The values we compare PCREL with are not what you'd expect; they're off by a little to compensate for (1) where the reloc is relative to the insn, and (2) how much the insn is going to change when we relax it. */ /* These we have to decode. */ switch (insn[0]) { case 0x04: /* BRA pcdsp:24 */ if (-32768 + alignment_glue <= pcrel && pcrel <= 32765 - alignment_glue) { insn[0] = 0x38; SNIP (3, 1, newrel); *again = TRUE; } break; case 0x38: /* BRA pcdsp:16 */ if (-128 + alignment_glue <= pcrel && pcrel <= 127 - alignment_glue) { insn[0] = 0x2e; SNIP (2, 1, newrel); *again = TRUE; } break; case 0x2e: /* BRA pcdsp:8 */ /* Note that there's a risk here of shortening things so much that we no longer fit this reloc; it *should* only happen when you branch across a branch, and that branch also devolves into BRA.S. "Real" code should be OK. */ if (max_pcrel3 + alignment_glue <= pcrel && pcrel <= 10 - alignment_glue && allow_pcrel3) { insn[0] = 0x08; SNIP (1, 1, newrel); move_reloc (irel, srel, -1); *again = TRUE; } break; case 0x05: /* BSR pcdsp:24 */ if (-32768 + alignment_glue <= pcrel && pcrel <= 32765 - alignment_glue) { insn[0] = 0x39; SNIP (1, 1, newrel); *again = TRUE; } break; case 0x3a: /* BEQ.W pcdsp:16 */ case 0x3b: /* BNE.W pcdsp:16 */ if (-128 + alignment_glue <= pcrel && pcrel <= 127 - alignment_glue) { insn[0] = 0x20 | (insn[0] & 1); SNIP (1, 1, newrel); *again = TRUE; } break; case 0x20: /* BEQ.B pcdsp:8 */ case 0x21: /* BNE.B pcdsp:8 */ if (max_pcrel3 + alignment_glue <= pcrel && pcrel - alignment_glue <= 10 && allow_pcrel3) { insn[0] = 0x10 | ((insn[0] & 1) << 3); SNIP (1, 1, newrel); move_reloc (irel, srel, -1); *again = TRUE; } break; case 0x16: /* synthetic BNE dsp24 */ case 0x1e: /* synthetic BEQ dsp24 */ if (-32767 + alignment_glue <= pcrel && pcrel <= 32766 - alignment_glue && insn[1] == 0x04) { if (insn[0] == 0x16) insn[0] = 0x3b; else insn[0] = 0x3a; /* We snip out the bytes at the end else the reloc will get moved too, and too much. */ SNIP (3, 2, newrel); move_reloc (irel, srel, -1); *again = TRUE; } break; } /* Special case - synthetic conditional branches, pcrel24. Note that EQ and NE have been handled above. */ if ((insn[0] & 0xf0) == 0x20 && insn[1] == 0x06 && insn[2] == 0x04 && srel->r_offset != irel->r_offset + 1 && -32767 + alignment_glue <= pcrel && pcrel <= 32766 - alignment_glue) { insn[1] = 0x05; insn[2] = 0x38; SNIP (5, 1, newrel); *again = TRUE; } /* Special case - synthetic conditional branches, pcrel16 */ if ((insn[0] & 0xf0) == 0x20 && insn[1] == 0x05 && insn[2] == 0x38 && srel->r_offset != irel->r_offset + 1 && -127 + alignment_glue <= pcrel && pcrel <= 126 - alignment_glue) { int cond = (insn[0] & 0x0f) ^ 0x01; insn[0] = 0x20 | cond; /* By moving the reloc first, we avoid having delete_bytes move it also. */ move_reloc (irel, srel, -2); SNIP (2, 3, newrel); *again = TRUE; } } BFD_ASSERT (nrelocs == 0); /* Special case - check MOV.bwl #IMM, dsp[reg] and see if we can use MOV.bwl #uimm:8, dsp:5[r7] format. This is tricky because it may have one or two relocations. */ if ((insn[0] & 0xfc) == 0xf8 && (insn[1] & 0x80) == 0x00 && (insn[0] & 0x03) != 0x03) { int dcode, icode, reg, ioff, dscale, ilen; bfd_vma disp_val = 0; long imm_val = 0; Elf_Internal_Rela * disp_rel = 0; Elf_Internal_Rela * imm_rel = 0; /* Reset this. */ srel = irel; dcode = insn[0] & 0x03; icode = (insn[1] >> 2) & 0x03; reg = (insn[1] >> 4) & 0x0f; ioff = dcode == 1 ? 3 : dcode == 2 ? 4 : 2; /* Figure out what the dispacement is. */ if (dcode == 1 || dcode == 2) { /* There's a displacement. See if there's a reloc for it. */ if (srel[1].r_offset == irel->r_offset + 2) { GET_RELOC; disp_val = symval; disp_rel = srel; } else { if (dcode == 1) disp_val = insn[2]; else { #if RX_OPCODE_BIG_ENDIAN disp_val = insn[2] * 256 + insn[3]; #else disp_val = insn[2] + insn[3] * 256; #endif } switch (insn[1] & 3) { case 1: disp_val *= 2; scale = 2; break; case 2: disp_val *= 4; scale = 4; break; } } } dscale = scale; /* Figure out what the immediate is. */ if (srel[1].r_offset == irel->r_offset + ioff) { GET_RELOC; imm_val = (long) symval; imm_rel = srel; } else { unsigned char * ip = insn + ioff; switch (icode) { case 1: /* For byte writes, we don't sign extend. Makes the math easier later. */ if (scale == 1) imm_val = ip[0]; else imm_val = (char) ip[0]; break; case 2: #if RX_OPCODE_BIG_ENDIAN imm_val = ((char) ip[0] << 8) | ip[1]; #else imm_val = ((char) ip[1] << 8) | ip[0]; #endif break; case 3: #if RX_OPCODE_BIG_ENDIAN imm_val = ((char) ip[0] << 16) | (ip[1] << 8) | ip[2]; #else imm_val = ((char) ip[2] << 16) | (ip[1] << 8) | ip[0]; #endif break; case 0: #if RX_OPCODE_BIG_ENDIAN imm_val = (ip[0] << 24) | (ip[1] << 16) | (ip[2] << 8) | ip[3]; #else imm_val = (ip[3] << 24) | (ip[2] << 16) | (ip[1] << 8) | ip[0]; #endif break; } } ilen = 2; switch (dcode) { case 1: ilen += 1; break; case 2: ilen += 2; break; } switch (icode) { case 1: ilen += 1; break; case 2: ilen += 2; break; case 3: ilen += 3; break; case 4: ilen += 4; break; } /* The shortcut happens when the immediate is 0..255, register r0 to r7, and displacement (scaled) 0..31. */ if (0 <= imm_val && imm_val <= 255 && 0 <= reg && reg <= 7 && disp_val / dscale <= 31) { insn[0] = 0x3c | (insn[1] & 0x03); insn[1] = (((disp_val / dscale) << 3) & 0x80) | (reg << 4) | ((disp_val/dscale) & 0x0f); insn[2] = imm_val; if (disp_rel) { int newrel = R_RX_NONE; switch (dscale) { case 1: newrel = R_RX_RH_ABS5p8B; break; case 2: newrel = R_RX_RH_ABS5p8W; break; case 4: newrel = R_RX_RH_ABS5p8L; break; } disp_rel->r_info = ELF32_R_INFO (ELF32_R_SYM (disp_rel->r_info), newrel); move_reloc (irel, disp_rel, -1); } if (imm_rel) { imm_rel->r_info = ELF32_R_INFO (ELF32_R_SYM (imm_rel->r_info), R_RX_DIR8U); move_reloc (disp_rel ? disp_rel : irel, imm_rel, irel->r_offset - imm_rel->r_offset + 2); } SNIPNR (3, ilen - 3); *again = TRUE; /* We can't relax this new opcode. */ irel->r_addend = 0; } } } /* We can't reliably relax branches to DIR3U_PCREL unless we know whatever they're branching over won't shrink any more. If we're basically done here, do one more pass just for branches - but don't request a pass after that one! */ if (!*again && !allow_pcrel3) { bfd_boolean ignored; elf32_rx_relax_section (abfd, sec, link_info, &ignored, TRUE); } return TRUE; error_return: if (free_relocs != NULL) free (free_relocs); if (free_contents != NULL) free (free_contents); if (shndx_buf != NULL) { shndx_hdr->contents = NULL; free (shndx_buf); } if (free_intsyms != NULL) free (free_intsyms); return FALSE; } static bfd_boolean elf32_rx_relax_section_wrapper (bfd * abfd, asection * sec, struct bfd_link_info * link_info, bfd_boolean * again) { return elf32_rx_relax_section (abfd, sec, link_info, again, FALSE); } /* Function to set the ELF flag bits. */ static bfd_boolean rx_elf_set_private_flags (bfd * abfd, flagword flags) { elf_elfheader (abfd)->e_flags = flags; elf_flags_init (abfd) = TRUE; return TRUE; } static bfd_boolean no_warn_mismatch = FALSE; void bfd_elf32_rx_set_target_flags (bfd_boolean); void bfd_elf32_rx_set_target_flags (bfd_boolean user_no_warn_mismatch) { no_warn_mismatch = user_no_warn_mismatch; } /* Merge backend specific data from an object file to the output object file when linking. */ static bfd_boolean rx_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd) { flagword old_flags; flagword new_flags; bfd_boolean error = FALSE; new_flags = elf_elfheader (ibfd)->e_flags; old_flags = elf_elfheader (obfd)->e_flags; if (!elf_flags_init (obfd)) { /* First call, no flags set. */ elf_flags_init (obfd) = TRUE; elf_elfheader (obfd)->e_flags = new_flags; } else if (old_flags != new_flags) { flagword known_flags = E_FLAG_RX_64BIT_DOUBLES | E_FLAG_RX_DSP; if ((old_flags ^ new_flags) & known_flags) { /* Only complain if flag bits we care about do not match. Other bits may be set, since older binaries did use some deprecated flags. */ if (no_warn_mismatch) { elf_elfheader (obfd)->e_flags = (new_flags | old_flags) & known_flags; } else { (*_bfd_error_handler) ("ELF header flags mismatch: old_flags = 0x%.8lx, new_flags = 0x%.8lx, filename = %s", old_flags, new_flags, bfd_get_filename (ibfd)); error = TRUE; } } else elf_elfheader (obfd)->e_flags = new_flags & known_flags; } if (error) bfd_set_error (bfd_error_bad_value); return !error; } static bfd_boolean rx_elf_print_private_bfd_data (bfd * abfd, void * ptr) { FILE * file = (FILE *) ptr; flagword flags; BFD_ASSERT (abfd != NULL && ptr != NULL); /* Print normal ELF private data. */ _bfd_elf_print_private_bfd_data (abfd, ptr); flags = elf_elfheader (abfd)->e_flags; fprintf (file, _("private flags = 0x%lx:"), (long) flags); if (flags & E_FLAG_RX_64BIT_DOUBLES) fprintf (file, _(" [64-bit doubles]")); if (flags & E_FLAG_RX_DSP) fprintf (file, _(" [dsp]")); fputc ('\n', file); return TRUE; } /* Return the MACH for an e_flags value. */ static int elf32_rx_machine (bfd * abfd) { if ((elf_elfheader (abfd)->e_flags & EF_RX_CPU_MASK) == EF_RX_CPU_RX) return bfd_mach_rx; return 0; } static bfd_boolean rx_elf_object_p (bfd * abfd) { bfd_default_set_arch_mach (abfd, bfd_arch_rx, elf32_rx_machine (abfd)); return TRUE; } #ifdef DEBUG void dump_symtab (bfd * abfd, void * internal_syms, void * external_syms) { size_t locsymcount; Elf_Internal_Sym * isymbuf; Elf_Internal_Sym * isymend; Elf_Internal_Sym * isym; Elf_Internal_Shdr * symtab_hdr; bfd_boolean free_internal = FALSE, free_external = FALSE; char * st_info_str; char * st_info_stb_str; char * st_other_str; char * st_shndx_str; if (! internal_syms) { internal_syms = bfd_malloc (1000); free_internal = 1; } if (! external_syms) { external_syms = bfd_malloc (1000); free_external = 1; } symtab_hdr = &elf_tdata (abfd)->symtab_hdr; locsymcount = symtab_hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; if (free_internal) isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, internal_syms, external_syms, NULL); else isymbuf = internal_syms; isymend = isymbuf + locsymcount; for (isym = isymbuf ; isym < isymend ; isym++) { switch (ELF_ST_TYPE (isym->st_info)) { case STT_FUNC: st_info_str = "STT_FUNC"; case STT_SECTION: st_info_str = "STT_SECTION"; case STT_FILE: st_info_str = "STT_FILE"; case STT_OBJECT: st_info_str = "STT_OBJECT"; case STT_TLS: st_info_str = "STT_TLS"; default: st_info_str = ""; } switch (ELF_ST_BIND (isym->st_info)) { case STB_LOCAL: st_info_stb_str = "STB_LOCAL"; case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL"; default: st_info_stb_str = ""; } switch (ELF_ST_VISIBILITY (isym->st_other)) { case STV_DEFAULT: st_other_str = "STV_DEFAULT"; case STV_INTERNAL: st_other_str = "STV_INTERNAL"; case STV_PROTECTED: st_other_str = "STV_PROTECTED"; default: st_other_str = ""; } switch (isym->st_shndx) { case SHN_ABS: st_shndx_str = "SHN_ABS"; case SHN_COMMON: st_shndx_str = "SHN_COMMON"; case SHN_UNDEF: st_shndx_str = "SHN_UNDEF"; default: st_shndx_str = ""; } printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", isym, (unsigned long) isym->st_value, (unsigned long) isym->st_size, isym->st_name, bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, isym->st_name), isym->st_info, st_info_str, st_info_stb_str, isym->st_other, st_other_str, isym->st_shndx, st_shndx_str); } if (free_internal) free (internal_syms); if (free_external) free (external_syms); } char * rx_get_reloc (long reloc) { if (0 <= reloc && reloc < R_RX_max) return rx_elf_howto_table[reloc].name; return ""; } #endif /* DEBUG */ /* We must take care to keep the on-disk copy of any code sections that are fully linked swapped if the target is big endian, to match the Renesas tools. */ /* The rule is: big endian object that are final-link executables, have code sections stored with 32-bit words swapped relative to what you'd get by default. */ static bfd_boolean rx_get_section_contents (bfd * abfd, sec_ptr section, void * location, file_ptr offset, bfd_size_type count) { int exec = (abfd->flags & EXEC_P) ? 1 : 0; int s_code = (section->flags & SEC_CODE) ? 1 : 0; bfd_boolean rv; #ifdef DJDEBUG fprintf (stderr, "dj: get %ld %ld from %s %s e%d sc%d %08lx:%08lx\n", (long) offset, (long) count, section->name, bfd_big_endian(abfd) ? "be" : "le", exec, s_code, (long unsigned) section->filepos, (long unsigned) offset); #endif if (exec && s_code && bfd_big_endian (abfd)) { char * cloc = (char *) location; bfd_size_type cnt, end_cnt; rv = TRUE; /* Fetch and swap unaligned bytes at the beginning. */ if (offset % 4) { char buf[4]; rv = _bfd_generic_get_section_contents (abfd, section, buf, (offset & -4), 4); if (!rv) return FALSE; bfd_putb32 (bfd_getl32 (buf), buf); cnt = 4 - (offset % 4); if (cnt > count) cnt = count; memcpy (location, buf + (offset % 4), cnt); count -= cnt; offset += cnt; cloc += count; } end_cnt = count % 4; /* Fetch and swap the middle bytes. */ if (count >= 4) { rv = _bfd_generic_get_section_contents (abfd, section, cloc, offset, count - end_cnt); if (!rv) return FALSE; for (cnt = count; cnt >= 4; cnt -= 4, cloc += 4) bfd_putb32 (bfd_getl32 (cloc), cloc); } /* Fetch and swap the end bytes. */ if (end_cnt > 0) { char buf[4]; /* Fetch the end bytes. */ rv = _bfd_generic_get_section_contents (abfd, section, buf, offset + count - end_cnt, 4); if (!rv) return FALSE; bfd_putb32 (bfd_getl32 (buf), buf); memcpy (cloc, buf, end_cnt); } } else rv = _bfd_generic_get_section_contents (abfd, section, location, offset, count); return rv; } #ifdef DJDEBUG static bfd_boolean rx2_set_section_contents (bfd * abfd, sec_ptr section, const void * location, file_ptr offset, bfd_size_type count) { bfd_size_type i; fprintf (stderr, " set sec %s %08x loc %p offset %#x count %#x\n", section->name, (unsigned) section->vma, location, (int) offset, (int) count); for (i = 0; i < count; i++) { if (i % 16 == 0 && i > 0) fprintf (stderr, "\n"); if (i % 16 && i % 4 == 0) fprintf (stderr, " "); if (i % 16 == 0) fprintf (stderr, " %08x:", (int) (section->vma + offset + i)); fprintf (stderr, " %02x", ((unsigned char *) location)[i]); } fprintf (stderr, "\n"); return _bfd_elf_set_section_contents (abfd, section, location, offset, count); } #define _bfd_elf_set_section_contents rx2_set_section_contents #endif static bfd_boolean rx_set_section_contents (bfd * abfd, sec_ptr section, const void * location, file_ptr offset, bfd_size_type count) { bfd_boolean exec = (abfd->flags & EXEC_P) ? TRUE : FALSE; bfd_boolean s_code = (section->flags & SEC_CODE) ? TRUE : FALSE; bfd_boolean rv; char * swapped_data = NULL; bfd_size_type i; bfd_vma caddr = section->vma + offset; file_ptr faddr = 0; bfd_size_type scount; #ifdef DJDEBUG bfd_size_type i; fprintf (stderr, "\ndj: set %ld %ld to %s %s e%d sc%d\n", (long) offset, (long) count, section->name, bfd_big_endian (abfd) ? "be" : "le", exec, s_code); for (i = 0; i < count; i++) { int a = section->vma + offset + i; if (a % 16 == 0 && a > 0) fprintf (stderr, "\n"); if (a % 16 && a % 4 == 0) fprintf (stderr, " "); if (a % 16 == 0 || i == 0) fprintf (stderr, " %08x:", (int) (section->vma + offset + i)); fprintf (stderr, " %02x", ((unsigned char *) location)[i]); } fprintf (stderr, "\n"); #endif if (! exec || ! s_code || ! bfd_big_endian (abfd)) return _bfd_elf_set_section_contents (abfd, section, location, offset, count); while (count > 0 && caddr > 0 && caddr % 4) { switch (caddr % 4) { case 0: faddr = offset + 3; break; case 1: faddr = offset + 1; break; case 2: faddr = offset - 1; break; case 3: faddr = offset - 3; break; } rv = _bfd_elf_set_section_contents (abfd, section, location, faddr, 1); if (! rv) return rv; location ++; offset ++; count --; caddr ++; } scount = (int)(count / 4) * 4; if (scount > 0) { char * cloc = (char *) location; swapped_data = (char *) bfd_alloc (abfd, count); for (i = 0; i < count; i += 4) { bfd_vma v = bfd_getl32 (cloc + i); bfd_putb32 (v, swapped_data + i); } rv = _bfd_elf_set_section_contents (abfd, section, swapped_data, offset, scount); if (!rv) return rv; } count -= scount; location += scount; offset += scount; if (count > 0) { caddr = section->vma + offset; while (count > 0) { switch (caddr % 4) { case 0: faddr = offset + 3; break; case 1: faddr = offset + 1; break; case 2: faddr = offset - 1; break; case 3: faddr = offset - 3; break; } rv = _bfd_elf_set_section_contents (abfd, section, location, faddr, 1); if (! rv) return rv; location ++; offset ++; count --; caddr ++; } } return TRUE; } static bfd_boolean rx_final_link (bfd * abfd, struct bfd_link_info * info) { asection * o; for (o = abfd->sections; o != NULL; o = o->next) { #ifdef DJDEBUG fprintf (stderr, "sec %s fl %x vma %lx lma %lx size %lx raw %lx\n", o->name, o->flags, o->vma, o->lma, o->size, o->rawsize); #endif if (o->flags & SEC_CODE && bfd_big_endian (abfd) && (o->size % 4 || o->rawsize % 4)) { #ifdef DJDEBUG fprintf (stderr, "adjusting...\n"); #endif o->size += 4 - (o->size % 4); o->rawsize += 4 - (o->rawsize % 4); } } return bfd_elf_final_link (abfd, info); } static bfd_boolean elf32_rx_modify_program_headers (bfd * abfd ATTRIBUTE_UNUSED, struct bfd_link_info * info ATTRIBUTE_UNUSED) { const struct elf_backend_data * bed; struct elf_obj_tdata * tdata; Elf_Internal_Phdr * phdr; unsigned int count; unsigned int i; bed = get_elf_backend_data (abfd); tdata = elf_tdata (abfd); phdr = tdata->phdr; count = tdata->program_header_size / bed->s->sizeof_phdr; for (i = count; i-- != 0; ) if (phdr[i].p_type == PT_LOAD) { /* The Renesas tools expect p_paddr to be zero. However, there is no other way to store the writable data in ROM for startup initialization. So, we let the linker *think* we're using paddr and vaddr the "usual" way, but at the last minute we move the paddr into the vaddr (which is what the simulator uses) and zero out paddr. Note that this does not affect the section headers, just the program headers. We hope. */ phdr[i].p_vaddr = phdr[i].p_paddr; /* If we zero out p_paddr, then the LMA in the section table becomes wrong. */ /*phdr[i].p_paddr = 0;*/ } return TRUE; } #define ELF_ARCH bfd_arch_rx #define ELF_MACHINE_CODE EM_RX #define ELF_MAXPAGESIZE 0x1000 #define TARGET_BIG_SYM bfd_elf32_rx_be_vec #define TARGET_BIG_NAME "elf32-rx-be" #define TARGET_LITTLE_SYM bfd_elf32_rx_le_vec #define TARGET_LITTLE_NAME "elf32-rx-le" #define elf_info_to_howto_rel NULL #define elf_info_to_howto rx_info_to_howto_rela #define elf_backend_object_p rx_elf_object_p #define elf_backend_relocate_section rx_elf_relocate_section #define elf_symbol_leading_char ('_') #define elf_backend_can_gc_sections 1 #define elf_backend_modify_program_headers elf32_rx_modify_program_headers #define bfd_elf32_bfd_reloc_type_lookup rx_reloc_type_lookup #define bfd_elf32_bfd_reloc_name_lookup rx_reloc_name_lookup #define bfd_elf32_bfd_set_private_flags rx_elf_set_private_flags #define bfd_elf32_bfd_merge_private_bfd_data rx_elf_merge_private_bfd_data #define bfd_elf32_bfd_print_private_bfd_data rx_elf_print_private_bfd_data #define bfd_elf32_get_section_contents rx_get_section_contents #define bfd_elf32_set_section_contents rx_set_section_contents #define bfd_elf32_bfd_final_link rx_final_link #define bfd_elf32_bfd_relax_section elf32_rx_relax_section_wrapper #include "elf32-target.h"
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