6ff71e7681
gas * config/tc-rl78.h (TC_LINKRELAX_FIXUP): Define. (TC_FORCE_RELOCATION_SUB_SAME): Define. (DWARF2_USE_FIXED_ADVANCE_PC): Define. * gas/lns/lns.exp: Add RL78 to list of targets using DW_LNS_fixed_advance_pc. bfd * elf32-rl78.c (RL78_OP_REL): New macro. (rl78_elf_howto_table): Use it for complex relocs. (get_symbol_value): Handle the cases when the info or status arguments are NULL. (get_romstart): Cache the status returned by get_symbol_value. (get_ramstart): Likewise. (RL78_STACK_PUSH): Generate an error message if the stack overflows. (RL78_STACK_POP): Likewise for underflows. (rl78_compute_complex_reloc): New function. Contains the basic processing code for all RL78 complex relocs. (rl78_special_reloc): New function. Provides special reloc handling for complex relocs. (rl78_elf_relocate_section): Use rl78_compute_complex_reloc. (rl78_offset_for_reloc): Likewise. binutils* readelf.c (target_specific_reloc_handling): Add code to handle RL78 complex relocs.
1441 lines
35 KiB
C
1441 lines
35 KiB
C
/* tc-rl78.c -- Assembler for the Renesas RL78
|
||
Copyright (C) 2011-2015 Free Software Foundation, Inc.
|
||
|
||
This file is part of GAS, the GNU Assembler.
|
||
|
||
GAS 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, or (at your option)
|
||
any later version.
|
||
|
||
GAS 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 GAS; see the file COPYING. If not, write to the Free
|
||
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
||
02110-1301, USA. */
|
||
|
||
#include "as.h"
|
||
#include "struc-symbol.h"
|
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#include "safe-ctype.h"
|
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#include "dwarf2dbg.h"
|
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#include "libbfd.h"
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#include "elf/common.h"
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#include "elf/rl78.h"
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#include "rl78-defs.h"
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#include "filenames.h"
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#include "listing.h"
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#include "sb.h"
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#include "macro.h"
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const char comment_chars[] = ";";
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/* Note that input_file.c hand checks for '#' at the beginning of the
|
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first line of the input file. This is because the compiler outputs
|
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#NO_APP at the beginning of its output. */
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const char line_comment_chars[] = "#";
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/* Use something that isn't going to be needed by any expressions or
|
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other syntax. */
|
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const char line_separator_chars[] = "@";
|
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|
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const char EXP_CHARS[] = "eE";
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const char FLT_CHARS[] = "dD";
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/* ELF flags to set in the output file header. */
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static int elf_flags = 0;
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/*------------------------------------------------------------------*/
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char * rl78_lex_start;
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char * rl78_lex_end;
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typedef struct rl78_bytesT
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{
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char prefix[1];
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int n_prefix;
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char base[4];
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int n_base;
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char ops[8];
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int n_ops;
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struct
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{
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expressionS exp;
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char offset;
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char nbits;
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char type; /* RL78REL_*. */
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int reloc;
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fixS * fixP;
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} fixups[2];
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int n_fixups;
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struct
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{
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char type;
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char field_pos;
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char val_ofs;
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} relax[2];
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int n_relax;
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int link_relax;
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fixS *link_relax_fixP;
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char times_grown;
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char times_shrank;
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} rl78_bytesT;
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static rl78_bytesT rl78_bytes;
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void
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rl78_relax (int type, int pos)
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{
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rl78_bytes.relax[rl78_bytes.n_relax].type = type;
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rl78_bytes.relax[rl78_bytes.n_relax].field_pos = pos;
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rl78_bytes.relax[rl78_bytes.n_relax].val_ofs = rl78_bytes.n_base + rl78_bytes.n_ops;
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rl78_bytes.n_relax ++;
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}
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void
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rl78_linkrelax_addr16 (void)
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{
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rl78_bytes.link_relax |= RL78_RELAXA_ADDR16;
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}
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void
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rl78_linkrelax_branch (void)
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{
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rl78_bytes.link_relax |= RL78_RELAXA_BRA;
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}
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|
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static void
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rl78_fixup (expressionS exp, int offsetbits, int nbits, int type)
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{
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rl78_bytes.fixups[rl78_bytes.n_fixups].exp = exp;
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rl78_bytes.fixups[rl78_bytes.n_fixups].offset = offsetbits;
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rl78_bytes.fixups[rl78_bytes.n_fixups].nbits = nbits;
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rl78_bytes.fixups[rl78_bytes.n_fixups].type = type;
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rl78_bytes.fixups[rl78_bytes.n_fixups].reloc = exp.X_md;
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rl78_bytes.n_fixups ++;
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}
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#define rl78_field_fixup(exp, offset, nbits, type) \
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rl78_fixup (exp, offset + 8 * rl78_bytes.n_prefix), nbits, type)
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|
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#define rl78_op_fixup(exp, offset, nbits, type) \
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rl78_fixup (exp, offset + 8 * (rl78_bytes.n_prefix + rl78_bytes.n_base), nbits, type)
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|
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void
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rl78_prefix (int p)
|
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{
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rl78_bytes.prefix[0] = p;
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rl78_bytes.n_prefix = 1;
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}
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int
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rl78_has_prefix ()
|
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{
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return rl78_bytes.n_prefix;
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}
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void
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rl78_base1 (int b1)
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{
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rl78_bytes.base[0] = b1;
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rl78_bytes.n_base = 1;
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}
|
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void
|
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rl78_base2 (int b1, int b2)
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{
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rl78_bytes.base[0] = b1;
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rl78_bytes.base[1] = b2;
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rl78_bytes.n_base = 2;
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}
|
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|
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void
|
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rl78_base3 (int b1, int b2, int b3)
|
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{
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rl78_bytes.base[0] = b1;
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rl78_bytes.base[1] = b2;
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rl78_bytes.base[2] = b3;
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rl78_bytes.n_base = 3;
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}
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void
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rl78_base4 (int b1, int b2, int b3, int b4)
|
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{
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rl78_bytes.base[0] = b1;
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rl78_bytes.base[1] = b2;
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rl78_bytes.base[2] = b3;
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rl78_bytes.base[3] = b4;
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rl78_bytes.n_base = 4;
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}
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#define F_PRECISION 2
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void
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rl78_op (expressionS exp, int nbytes, int type)
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{
|
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int v = 0;
|
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if ((exp.X_op == O_constant || exp.X_op == O_big)
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&& type != RL78REL_PCREL)
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{
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if (exp.X_op == O_big && exp.X_add_number <= 0)
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{
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LITTLENUM_TYPE w[2];
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char * ip = rl78_bytes.ops + rl78_bytes.n_ops;
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gen_to_words (w, F_PRECISION, 8);
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ip[3] = w[0] >> 8;
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ip[2] = w[0];
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ip[1] = w[1] >> 8;
|
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ip[0] = w[1];
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rl78_bytes.n_ops += 4;
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}
|
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else
|
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{
|
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v = exp.X_add_number;
|
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while (nbytes)
|
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{
|
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rl78_bytes.ops[rl78_bytes.n_ops++] =v & 0xff;
|
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v >>= 8;
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nbytes --;
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}
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}
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}
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else
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{
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if (nbytes > 2
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&& exp.X_md == BFD_RELOC_RL78_CODE)
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exp.X_md = 0;
|
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|
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if (nbytes == 1
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&& (exp.X_md == BFD_RELOC_RL78_LO16
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|| exp.X_md == BFD_RELOC_RL78_HI16))
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as_bad (_("16-bit relocation used in 8-bit operand"));
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if (nbytes == 2
|
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&& exp.X_md == BFD_RELOC_RL78_HI8)
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as_bad (_("8-bit relocation used in 16-bit operand"));
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rl78_op_fixup (exp, rl78_bytes.n_ops * 8, nbytes * 8, type);
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memset (rl78_bytes.ops + rl78_bytes.n_ops, 0, nbytes);
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rl78_bytes.n_ops += nbytes;
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}
|
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}
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|
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/* This gets complicated when the field spans bytes, because fields
|
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are numbered from the MSB of the first byte as zero, and bits are
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stored LSB towards the LSB of the byte. Thus, a simple four-bit
|
||
insertion of 12 at position 4 of 0x00 yields: 0x0b. A three-bit
|
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insertion of b'MXL at position 7 is like this:
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- - - - - - - - - - - - - - - -
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M X L */
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void
|
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rl78_field (int val, int pos, int sz)
|
||
{
|
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int valm;
|
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int bytep, bitp;
|
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|
||
if (sz > 0)
|
||
{
|
||
if (val < 0 || val >= (1 << sz))
|
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as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz);
|
||
}
|
||
else
|
||
{
|
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sz = - sz;
|
||
if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1)))
|
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as_bad (_("Value %d doesn't fit in signed %d-bit field"), val, sz);
|
||
}
|
||
|
||
/* This code points at 'M' in the above example. */
|
||
bytep = pos / 8;
|
||
bitp = pos % 8;
|
||
|
||
while (bitp + sz > 8)
|
||
{
|
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int ssz = 8 - bitp;
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int svalm;
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|
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svalm = val >> (sz - ssz);
|
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svalm = svalm & ((1 << ssz) - 1);
|
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svalm = svalm << (8 - bitp - ssz);
|
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gas_assert (bytep < rl78_bytes.n_base);
|
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rl78_bytes.base[bytep] |= svalm;
|
||
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||
bitp = 0;
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sz -= ssz;
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bytep ++;
|
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}
|
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valm = val & ((1 << sz) - 1);
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valm = valm << (8 - bitp - sz);
|
||
gas_assert (bytep < rl78_bytes.n_base);
|
||
rl78_bytes.base[bytep] |= valm;
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||
}
|
||
|
||
/*------------------------------------------------------------------*/
|
||
|
||
enum options
|
||
{
|
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OPTION_RELAX = OPTION_MD_BASE,
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OPTION_G10,
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OPTION_G13,
|
||
OPTION_G14,
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||
OPTION_32BIT_DOUBLES,
|
||
OPTION_64BIT_DOUBLES,
|
||
};
|
||
|
||
#define RL78_SHORTOPTS ""
|
||
const char * md_shortopts = RL78_SHORTOPTS;
|
||
|
||
/* Assembler options. */
|
||
struct option md_longopts[] =
|
||
{
|
||
{"relax", no_argument, NULL, OPTION_RELAX},
|
||
{"mg10", no_argument, NULL, OPTION_G10},
|
||
{"mg13", no_argument, NULL, OPTION_G13},
|
||
{"mg14", no_argument, NULL, OPTION_G14},
|
||
{"mrl78", no_argument, NULL, OPTION_G14},
|
||
{"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES},
|
||
{"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES},
|
||
{NULL, no_argument, NULL, 0}
|
||
};
|
||
size_t md_longopts_size = sizeof (md_longopts);
|
||
|
||
int
|
||
md_parse_option (int c, char * arg ATTRIBUTE_UNUSED)
|
||
{
|
||
switch (c)
|
||
{
|
||
case OPTION_RELAX:
|
||
linkrelax = 1;
|
||
return 1;
|
||
|
||
case OPTION_G10:
|
||
elf_flags &= ~ E_FLAG_RL78_CPU_MASK;
|
||
elf_flags |= E_FLAG_RL78_G10;
|
||
return 1;
|
||
|
||
case OPTION_G13:
|
||
elf_flags &= ~ E_FLAG_RL78_CPU_MASK;
|
||
elf_flags |= E_FLAG_RL78_G13;
|
||
return 1;
|
||
|
||
case OPTION_G14:
|
||
elf_flags &= ~ E_FLAG_RL78_CPU_MASK;
|
||
elf_flags |= E_FLAG_RL78_G14;
|
||
return 1;
|
||
|
||
case OPTION_32BIT_DOUBLES:
|
||
elf_flags &= ~ E_FLAG_RL78_64BIT_DOUBLES;
|
||
return 1;
|
||
|
||
case OPTION_64BIT_DOUBLES:
|
||
elf_flags |= E_FLAG_RL78_64BIT_DOUBLES;
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
md_show_usage (FILE * stream)
|
||
{
|
||
fprintf (stream, _(" RL78 specific command line options:\n"));
|
||
fprintf (stream, _(" --mrelax Enable link time relaxation\n"));
|
||
fprintf (stream, _(" --mg10 Enable support for G10 variant\n"));
|
||
fprintf (stream, _(" --mg13 Selects the G13 core.\n"));
|
||
fprintf (stream, _(" --mg14 Selects the G14 core [default]\n"));
|
||
fprintf (stream, _(" --mrl78 Alias for --mg14\n"));
|
||
fprintf (stream, _(" --m32bit-doubles [default]\n"));
|
||
fprintf (stream, _(" --m64bit-doubles Source code uses 64-bit doubles\n"));
|
||
}
|
||
|
||
static void
|
||
s_bss (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
int temp;
|
||
|
||
temp = get_absolute_expression ();
|
||
subseg_set (bss_section, (subsegT) temp);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
static void
|
||
rl78_float_cons (int ignore ATTRIBUTE_UNUSED)
|
||
{
|
||
if (elf_flags & E_FLAG_RL78_64BIT_DOUBLES)
|
||
return float_cons ('d');
|
||
return float_cons ('f');
|
||
}
|
||
|
||
/* The target specific pseudo-ops which we support. */
|
||
const pseudo_typeS md_pseudo_table[] =
|
||
{
|
||
/* Our "standard" pseudos. */
|
||
{ "double", rl78_float_cons, 'd' },
|
||
{ "bss", s_bss, 0 },
|
||
{ "3byte", cons, 3 },
|
||
{ "int", cons, 4 },
|
||
{ "word", cons, 4 },
|
||
|
||
/* End of list marker. */
|
||
{ NULL, NULL, 0 }
|
||
};
|
||
|
||
void
|
||
md_begin (void)
|
||
{
|
||
}
|
||
|
||
void
|
||
rl78_md_end (void)
|
||
{
|
||
}
|
||
|
||
/* Set the ELF specific flags. */
|
||
void
|
||
rl78_elf_final_processing (void)
|
||
{
|
||
elf_elfheader (stdoutput)->e_flags |= elf_flags;
|
||
}
|
||
|
||
/* Write a value out to the object file, using the appropriate endianness. */
|
||
void
|
||
md_number_to_chars (char * buf, valueT val, int n)
|
||
{
|
||
number_to_chars_littleendian (buf, val, n);
|
||
}
|
||
|
||
static void
|
||
require_end_of_expr (char *fname)
|
||
{
|
||
while (* input_line_pointer == ' '
|
||
|| * input_line_pointer == '\t')
|
||
input_line_pointer ++;
|
||
|
||
if (! * input_line_pointer
|
||
|| strchr ("\n\r,", * input_line_pointer)
|
||
|| strchr (comment_chars, * input_line_pointer)
|
||
|| strchr (line_comment_chars, * input_line_pointer)
|
||
|| strchr (line_separator_chars, * input_line_pointer))
|
||
return;
|
||
|
||
as_bad (_("%%%s() must be outermost term in expression"), fname);
|
||
}
|
||
|
||
static struct
|
||
{
|
||
char * fname;
|
||
int reloc;
|
||
}
|
||
reloc_functions[] =
|
||
{
|
||
{ "code", BFD_RELOC_RL78_CODE },
|
||
{ "lo16", BFD_RELOC_RL78_LO16 },
|
||
{ "hi16", BFD_RELOC_RL78_HI16 },
|
||
{ "hi8", BFD_RELOC_RL78_HI8 },
|
||
{ 0, 0 }
|
||
};
|
||
|
||
void
|
||
md_operand (expressionS * exp ATTRIBUTE_UNUSED)
|
||
{
|
||
int reloc = 0;
|
||
int i;
|
||
|
||
for (i = 0; reloc_functions[i].fname; i++)
|
||
{
|
||
int flen = strlen (reloc_functions[i].fname);
|
||
|
||
if (input_line_pointer[0] == '%'
|
||
&& strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0
|
||
&& input_line_pointer[flen + 1] == '(')
|
||
{
|
||
reloc = reloc_functions[i].reloc;
|
||
input_line_pointer += flen + 2;
|
||
break;
|
||
}
|
||
}
|
||
if (reloc == 0)
|
||
return;
|
||
|
||
expression (exp);
|
||
if (* input_line_pointer == ')')
|
||
input_line_pointer ++;
|
||
|
||
exp->X_md = reloc;
|
||
|
||
require_end_of_expr (reloc_functions[i].fname);
|
||
}
|
||
|
||
void
|
||
rl78_frag_init (fragS * fragP)
|
||
{
|
||
if (rl78_bytes.n_relax || rl78_bytes.link_relax)
|
||
{
|
||
fragP->tc_frag_data = malloc (sizeof (rl78_bytesT));
|
||
memcpy (fragP->tc_frag_data, & rl78_bytes, sizeof (rl78_bytesT));
|
||
}
|
||
else
|
||
fragP->tc_frag_data = 0;
|
||
}
|
||
|
||
/* When relaxing, we need to output a reloc for any .align directive
|
||
so that we can retain this alignment as we adjust opcode sizes. */
|
||
void
|
||
rl78_handle_align (fragS * frag)
|
||
{
|
||
if (linkrelax
|
||
&& (frag->fr_type == rs_align
|
||
|| frag->fr_type == rs_align_code)
|
||
&& frag->fr_address + frag->fr_fix > 0
|
||
&& frag->fr_offset > 0
|
||
&& now_seg != bss_section)
|
||
{
|
||
fix_new (frag, frag->fr_fix, 0,
|
||
&abs_symbol, RL78_RELAXA_ALIGN + frag->fr_offset,
|
||
0, BFD_RELOC_RL78_RELAX);
|
||
/* For the purposes of relaxation, this relocation is attached
|
||
to the byte *after* the alignment - i.e. the byte that must
|
||
remain aligned. */
|
||
fix_new (frag->fr_next, 0, 0,
|
||
&abs_symbol, RL78_RELAXA_ELIGN + frag->fr_offset,
|
||
0, BFD_RELOC_RL78_RELAX);
|
||
}
|
||
}
|
||
|
||
char *
|
||
md_atof (int type, char * litP, int * sizeP)
|
||
{
|
||
return ieee_md_atof (type, litP, sizeP, target_big_endian);
|
||
}
|
||
|
||
symbolS *
|
||
md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
#define APPEND(B, N_B) \
|
||
if (rl78_bytes.N_B) \
|
||
{ \
|
||
memcpy (bytes + idx, rl78_bytes.B, rl78_bytes.N_B); \
|
||
idx += rl78_bytes.N_B; \
|
||
}
|
||
|
||
|
||
void
|
||
md_assemble (char * str)
|
||
{
|
||
char * bytes;
|
||
fragS * frag_then = frag_now;
|
||
int idx = 0;
|
||
int i;
|
||
int rel;
|
||
expressionS *exp;
|
||
|
||
/*printf("\033[32mASM: %s\033[0m\n", str);*/
|
||
|
||
dwarf2_emit_insn (0);
|
||
|
||
memset (& rl78_bytes, 0, sizeof (rl78_bytes));
|
||
|
||
rl78_lex_init (str, str + strlen (str));
|
||
|
||
rl78_parse ();
|
||
|
||
/* This simplifies the relaxation code. */
|
||
if (rl78_bytes.n_relax || rl78_bytes.link_relax)
|
||
{
|
||
int olen = rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops;
|
||
/* We do it this way because we want the frag to have the
|
||
rl78_bytes in it, which we initialize above. The extra bytes
|
||
are for relaxing. */
|
||
bytes = frag_more (olen + 3);
|
||
frag_then = frag_now;
|
||
frag_variant (rs_machine_dependent,
|
||
olen /* max_chars */,
|
||
0 /* var */,
|
||
olen /* subtype */,
|
||
0 /* symbol */,
|
||
0 /* offset */,
|
||
0 /* opcode */);
|
||
frag_then->fr_opcode = bytes;
|
||
frag_then->fr_fix = olen + (bytes - frag_then->fr_literal);
|
||
frag_then->fr_subtype = olen;
|
||
frag_then->fr_var = 0;
|
||
}
|
||
else
|
||
{
|
||
bytes = frag_more (rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops);
|
||
frag_then = frag_now;
|
||
}
|
||
|
||
APPEND (prefix, n_prefix);
|
||
APPEND (base, n_base);
|
||
APPEND (ops, n_ops);
|
||
|
||
if (rl78_bytes.link_relax)
|
||
{
|
||
fixS * f;
|
||
|
||
f = fix_new (frag_then,
|
||
(char *) bytes - frag_then->fr_literal,
|
||
0,
|
||
abs_section_sym,
|
||
rl78_bytes.link_relax | rl78_bytes.n_fixups,
|
||
0,
|
||
BFD_RELOC_RL78_RELAX);
|
||
frag_then->tc_frag_data->link_relax_fixP = f;
|
||
}
|
||
|
||
for (i = 0; i < rl78_bytes.n_fixups; i ++)
|
||
{
|
||
/* index: [nbytes][type] */
|
||
static int reloc_map[5][4] =
|
||
{
|
||
{ 0, 0 },
|
||
{ BFD_RELOC_8, BFD_RELOC_8_PCREL },
|
||
{ BFD_RELOC_16, BFD_RELOC_16_PCREL },
|
||
{ BFD_RELOC_24, BFD_RELOC_24_PCREL },
|
||
{ BFD_RELOC_32, BFD_RELOC_32_PCREL },
|
||
};
|
||
fixS * f;
|
||
|
||
idx = rl78_bytes.fixups[i].offset / 8;
|
||
rel = reloc_map [rl78_bytes.fixups[i].nbits / 8][(int) rl78_bytes.fixups[i].type];
|
||
|
||
if (rl78_bytes.fixups[i].reloc)
|
||
rel = rl78_bytes.fixups[i].reloc;
|
||
|
||
if (frag_then->tc_frag_data)
|
||
exp = & frag_then->tc_frag_data->fixups[i].exp;
|
||
else
|
||
exp = & rl78_bytes.fixups[i].exp;
|
||
|
||
f = fix_new_exp (frag_then,
|
||
(char *) bytes + idx - frag_then->fr_literal,
|
||
rl78_bytes.fixups[i].nbits / 8,
|
||
exp,
|
||
rl78_bytes.fixups[i].type == RL78REL_PCREL ? 1 : 0,
|
||
rel);
|
||
if (frag_then->tc_frag_data)
|
||
frag_then->tc_frag_data->fixups[i].fixP = f;
|
||
}
|
||
}
|
||
|
||
void
|
||
rl78_cons_fix_new (fragS * frag,
|
||
int where,
|
||
int size,
|
||
expressionS * exp)
|
||
{
|
||
bfd_reloc_code_real_type type;
|
||
fixS *fixP;
|
||
|
||
switch (size)
|
||
{
|
||
case 1:
|
||
type = BFD_RELOC_8;
|
||
break;
|
||
case 2:
|
||
type = BFD_RELOC_16;
|
||
break;
|
||
case 3:
|
||
type = BFD_RELOC_24;
|
||
break;
|
||
case 4:
|
||
type = BFD_RELOC_32;
|
||
break;
|
||
default:
|
||
as_bad (_("unsupported constant size %d\n"), size);
|
||
return;
|
||
}
|
||
|
||
switch (exp->X_md)
|
||
{
|
||
case BFD_RELOC_RL78_CODE:
|
||
if (size == 2)
|
||
type = exp->X_md;
|
||
break;
|
||
case BFD_RELOC_RL78_LO16:
|
||
case BFD_RELOC_RL78_HI16:
|
||
if (size != 2)
|
||
{
|
||
/* Fixups to assembler generated expressions do not use %hi or %lo. */
|
||
if (frag->fr_file)
|
||
as_bad (_("%%hi16/%%lo16 only applies to .short or .hword"));
|
||
}
|
||
else
|
||
type = exp->X_md;
|
||
break;
|
||
case BFD_RELOC_RL78_HI8:
|
||
if (size != 1)
|
||
{
|
||
/* Fixups to assembler generated expressions do not use %hi or %lo. */
|
||
if (frag->fr_file)
|
||
as_bad (_("%%hi8 only applies to .byte"));
|
||
}
|
||
else
|
||
type = exp->X_md;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (exp->X_op == O_subtract && exp->X_op_symbol)
|
||
{
|
||
if (size != 4 && size != 2 && size != 1)
|
||
as_bad (_("difference of two symbols only supported with .long, .short, or .byte"));
|
||
else
|
||
type = BFD_RELOC_RL78_DIFF;
|
||
}
|
||
|
||
fixP = fix_new_exp (frag, where, (int) size, exp, 0, type);
|
||
switch (exp->X_md)
|
||
{
|
||
/* These are intended to have values larger than the container,
|
||
since the backend puts only the portion we need in it.
|
||
However, we don't have a backend-specific reloc for them as
|
||
they're handled with complex relocations. */
|
||
case BFD_RELOC_RL78_LO16:
|
||
case BFD_RELOC_RL78_HI16:
|
||
case BFD_RELOC_RL78_HI8:
|
||
fixP->fx_no_overflow = 1;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
/*----------------------------------------------------------------------*/
|
||
/* To recap: we estimate everything based on md_estimate_size, then
|
||
adjust based on rl78_relax_frag. When it all settles, we call
|
||
md_convert frag to update the bytes. The relaxation types and
|
||
relocations are in fragP->tc_frag_data, which is a copy of that
|
||
rl78_bytes.
|
||
|
||
Our scheme is as follows: fr_fix has the size of the smallest
|
||
opcode (like BRA.S). We store the number of total bytes we need in
|
||
fr_subtype. When we're done relaxing, we use fr_subtype and the
|
||
existing opcode bytes to figure out what actual opcode we need to
|
||
put in there. If the fixup isn't resolvable now, we use the
|
||
maximal size. */
|
||
|
||
#define TRACE_RELAX 0
|
||
#define tprintf if (TRACE_RELAX) printf
|
||
|
||
|
||
typedef enum
|
||
{
|
||
OT_other,
|
||
OT_bt,
|
||
OT_bt_sfr,
|
||
OT_bt_es,
|
||
OT_bc,
|
||
OT_bh
|
||
} op_type_T;
|
||
|
||
/* We're looking for these types of relaxations:
|
||
|
||
BT 00110001 sbit0cc1 addr---- (cc is 10 (BF) or 01 (BT))
|
||
B~T 00110001 sbit0cc1 00000011 11101110 pcrel16- -------- (BR $!pcrel20)
|
||
|
||
BT sfr 00110001 sbit0cc0 sfr----- addr----
|
||
BT ES: 00010001 00101110 sbit0cc1 addr----
|
||
|
||
BC 110111cc addr----
|
||
B~C 110111cc 00000011 11101110 pcrel16- -------- (BR $!pcrel20)
|
||
|
||
BH 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20)
|
||
B~H 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20)
|
||
*/
|
||
|
||
/* Given the opcode bytes at OP, figure out which opcode it is and
|
||
return the type of opcode. We use this to re-encode the opcode as
|
||
a different size later. */
|
||
|
||
static op_type_T
|
||
rl78_opcode_type (char * op)
|
||
{
|
||
if (op[0] == 0x31
|
||
&& ((op[1] & 0x0f) == 0x05
|
||
|| (op[1] & 0x0f) == 0x03))
|
||
return OT_bt;
|
||
|
||
if (op[0] == 0x31
|
||
&& ((op[1] & 0x0f) == 0x04
|
||
|| (op[1] & 0x0f) == 0x02))
|
||
return OT_bt_sfr;
|
||
|
||
if (op[0] == 0x11
|
||
&& op[1] == 0x31
|
||
&& ((op[2] & 0x0f) == 0x05
|
||
|| (op[2] & 0x0f) == 0x03))
|
||
return OT_bt_es;
|
||
|
||
if ((op[0] & 0xfc) == 0xdc)
|
||
return OT_bc;
|
||
|
||
if (op[0] == 0x61
|
||
&& (op[1] & 0xef) == 0xc3)
|
||
return OT_bh;
|
||
|
||
return OT_other;
|
||
}
|
||
|
||
/* Returns zero if *addrP has the target address. Else returns nonzero
|
||
if we cannot compute the target address yet. */
|
||
|
||
static int
|
||
rl78_frag_fix_value (fragS * fragP,
|
||
segT segment,
|
||
int which,
|
||
addressT * addrP,
|
||
int need_diff,
|
||
addressT * sym_addr)
|
||
{
|
||
addressT addr = 0;
|
||
rl78_bytesT * b = fragP->tc_frag_data;
|
||
expressionS * exp = & b->fixups[which].exp;
|
||
|
||
if (need_diff && exp->X_op != O_subtract)
|
||
return 1;
|
||
|
||
if (exp->X_add_symbol)
|
||
{
|
||
if (S_FORCE_RELOC (exp->X_add_symbol, 1))
|
||
return 1;
|
||
if (S_GET_SEGMENT (exp->X_add_symbol) != segment)
|
||
return 1;
|
||
addr += S_GET_VALUE (exp->X_add_symbol);
|
||
}
|
||
|
||
if (exp->X_op_symbol)
|
||
{
|
||
if (exp->X_op != O_subtract)
|
||
return 1;
|
||
if (S_FORCE_RELOC (exp->X_op_symbol, 1))
|
||
return 1;
|
||
if (S_GET_SEGMENT (exp->X_op_symbol) != segment)
|
||
return 1;
|
||
addr -= S_GET_VALUE (exp->X_op_symbol);
|
||
}
|
||
if (sym_addr)
|
||
* sym_addr = addr;
|
||
addr += exp->X_add_number;
|
||
* addrP = addr;
|
||
return 0;
|
||
}
|
||
|
||
/* Estimate how big the opcode is after this relax pass. The return
|
||
value is the difference between fr_fix and the actual size. We
|
||
compute the total size in rl78_relax_frag and store it in fr_subtype,
|
||
so we only need to subtract fx_fix and return it. */
|
||
|
||
int
|
||
md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED)
|
||
{
|
||
int opfixsize;
|
||
int delta;
|
||
|
||
/* This is the size of the opcode that's accounted for in fr_fix. */
|
||
opfixsize = fragP->fr_fix - (fragP->fr_opcode - fragP->fr_literal);
|
||
/* This is the size of the opcode that isn't. */
|
||
delta = (fragP->fr_subtype - opfixsize);
|
||
|
||
tprintf (" -> opfixsize %d delta %d\n", opfixsize, delta);
|
||
return delta;
|
||
}
|
||
|
||
/* Given the new addresses for this relax pass, figure out how big
|
||
each opcode must be. We store the total number of bytes needed in
|
||
fr_subtype. The return value is the difference between the size
|
||
after the last pass and the size after this pass, so we use the old
|
||
fr_subtype to calculate the difference. */
|
||
|
||
int
|
||
rl78_relax_frag (segT segment ATTRIBUTE_UNUSED, fragS * fragP, long stretch)
|
||
{
|
||
addressT addr0, sym_addr;
|
||
addressT mypc;
|
||
int disp;
|
||
int oldsize = fragP->fr_subtype;
|
||
int newsize = oldsize;
|
||
op_type_T optype;
|
||
int ri;
|
||
|
||
mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal);
|
||
|
||
/* If we ever get more than one reloc per opcode, this is the one
|
||
we're relaxing. */
|
||
ri = 0;
|
||
|
||
optype = rl78_opcode_type (fragP->fr_opcode);
|
||
/* Try to get the target address. */
|
||
if (rl78_frag_fix_value (fragP, segment, ri, & addr0,
|
||
fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH,
|
||
& sym_addr))
|
||
{
|
||
/* If we don't, we must use the maximum size for the linker. */
|
||
switch (fragP->tc_frag_data->relax[ri].type)
|
||
{
|
||
case RL78_RELAX_BRANCH:
|
||
switch (optype)
|
||
{
|
||
case OT_bt:
|
||
newsize = 6;
|
||
break;
|
||
case OT_bt_sfr:
|
||
case OT_bt_es:
|
||
newsize = 7;
|
||
break;
|
||
case OT_bc:
|
||
newsize = 5;
|
||
break;
|
||
case OT_bh:
|
||
newsize = 6;
|
||
break;
|
||
case OT_other:
|
||
newsize = oldsize;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
}
|
||
fragP->fr_subtype = newsize;
|
||
tprintf (" -> new %d old %d delta %d (external)\n", newsize, oldsize, newsize-oldsize);
|
||
return newsize - oldsize;
|
||
}
|
||
|
||
if (sym_addr > mypc)
|
||
addr0 += stretch;
|
||
|
||
switch (fragP->tc_frag_data->relax[ri].type)
|
||
{
|
||
case RL78_RELAX_BRANCH:
|
||
disp = (int) addr0 - (int) mypc;
|
||
|
||
switch (optype)
|
||
{
|
||
case OT_bt:
|
||
if (disp >= -128 && (disp - (oldsize-2)) <= 127)
|
||
newsize = 3;
|
||
else
|
||
newsize = 6;
|
||
break;
|
||
case OT_bt_sfr:
|
||
case OT_bt_es:
|
||
if (disp >= -128 && (disp - (oldsize-3)) <= 127)
|
||
newsize = 4;
|
||
else
|
||
newsize = 7;
|
||
break;
|
||
case OT_bc:
|
||
if (disp >= -128 && (disp - (oldsize-1)) <= 127)
|
||
newsize = 2;
|
||
else
|
||
newsize = 5;
|
||
break;
|
||
case OT_bh:
|
||
if (disp >= -128 && (disp - (oldsize-2)) <= 127)
|
||
newsize = 3;
|
||
else
|
||
newsize = 6;
|
||
break;
|
||
case OT_other:
|
||
newsize = oldsize;
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* This prevents infinite loops in align-heavy sources. */
|
||
if (newsize < oldsize)
|
||
{
|
||
if (fragP->tc_frag_data->times_shrank > 10
|
||
&& fragP->tc_frag_data->times_grown > 10)
|
||
newsize = oldsize;
|
||
if (fragP->tc_frag_data->times_shrank < 20)
|
||
fragP->tc_frag_data->times_shrank ++;
|
||
}
|
||
else if (newsize > oldsize)
|
||
{
|
||
if (fragP->tc_frag_data->times_grown < 20)
|
||
fragP->tc_frag_data->times_grown ++;
|
||
}
|
||
|
||
fragP->fr_subtype = newsize;
|
||
tprintf (" -> new %d old %d delta %d\n", newsize, oldsize, newsize-oldsize);
|
||
return newsize - oldsize;
|
||
}
|
||
|
||
/* This lets us test for the opcode type and the desired size in a
|
||
switch statement. */
|
||
#define OPCODE(type,size) ((type) * 16 + (size))
|
||
|
||
/* Given the opcode stored in fr_opcode and the number of bytes we
|
||
think we need, encode a new opcode. We stored a pointer to the
|
||
fixup for this opcode in the tc_frag_data structure. If we can do
|
||
the fixup here, we change the relocation type to "none" (we test
|
||
for that in tc_gen_reloc) else we change it to the right type for
|
||
the new (biggest) opcode. */
|
||
|
||
void
|
||
md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
|
||
segT segment ATTRIBUTE_UNUSED,
|
||
fragS * fragP ATTRIBUTE_UNUSED)
|
||
{
|
||
rl78_bytesT * rl78b = fragP->tc_frag_data;
|
||
addressT addr0, mypc;
|
||
int disp;
|
||
int reloc_type, reloc_adjust;
|
||
char * op = fragP->fr_opcode;
|
||
int keep_reloc = 0;
|
||
int ri;
|
||
int fi = (rl78b->n_fixups > 1) ? 1 : 0;
|
||
fixS * fix = rl78b->fixups[fi].fixP;
|
||
|
||
/* If we ever get more than one reloc per opcode, this is the one
|
||
we're relaxing. */
|
||
ri = 0;
|
||
|
||
/* We used a new frag for this opcode, so the opcode address should
|
||
be the frag address. */
|
||
mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal);
|
||
tprintf("\033[32mmypc: 0x%x\033[0m\n", (int)mypc);
|
||
|
||
/* Try to get the target address. If we fail here, we just use the
|
||
largest format. */
|
||
if (rl78_frag_fix_value (fragP, segment, 0, & addr0,
|
||
fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, 0))
|
||
{
|
||
/* We don't know the target address. */
|
||
keep_reloc = 1;
|
||
addr0 = 0;
|
||
disp = 0;
|
||
tprintf ("unknown addr ? - %x = ?\n", (int)mypc);
|
||
}
|
||
else
|
||
{
|
||
/* We know the target address, and it's in addr0. */
|
||
disp = (int) addr0 - (int) mypc;
|
||
tprintf ("known addr %x - %x = %d\n", (int)addr0, (int)mypc, disp);
|
||
}
|
||
|
||
if (linkrelax)
|
||
keep_reloc = 1;
|
||
|
||
reloc_type = BFD_RELOC_NONE;
|
||
reloc_adjust = 0;
|
||
|
||
switch (fragP->tc_frag_data->relax[ri].type)
|
||
{
|
||
case RL78_RELAX_BRANCH:
|
||
switch (OPCODE (rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype))
|
||
{
|
||
|
||
case OPCODE (OT_bt, 3): /* BT A,$ - no change. */
|
||
disp -= 3;
|
||
op[2] = disp;
|
||
break;
|
||
|
||
case OPCODE (OT_bt, 6): /* BT A,$ - long version. */
|
||
disp -= 3;
|
||
op[1] ^= 0x06; /* toggle conditional. */
|
||
op[2] = 3; /* displacement over long branch. */
|
||
disp -= 3;
|
||
op[3] = 0xEE; /* BR $!addr20 */
|
||
op[4] = disp & 0xff;
|
||
op[5] = disp >> 8;
|
||
reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE;
|
||
reloc_adjust = 2;
|
||
break;
|
||
|
||
case OPCODE (OT_bt_sfr, 4): /* BT PSW,$ - no change. */
|
||
disp -= 4;
|
||
op[3] = disp;
|
||
break;
|
||
|
||
case OPCODE (OT_bt_sfr, 7): /* BT PSW,$ - long version. */
|
||
disp -= 4;
|
||
op[1] ^= 0x06; /* toggle conditional. */
|
||
op[3] = 3; /* displacement over long branch. */
|
||
disp -= 3;
|
||
op[4] = 0xEE; /* BR $!addr20 */
|
||
op[5] = disp & 0xff;
|
||
op[6] = disp >> 8;
|
||
reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE;
|
||
reloc_adjust = 2;
|
||
break;
|
||
|
||
case OPCODE (OT_bt_es, 4): /* BT ES:[HL],$ - no change. */
|
||
disp -= 4;
|
||
op[3] = disp;
|
||
break;
|
||
|
||
case OPCODE (OT_bt_es, 7): /* BT PSW,$ - long version. */
|
||
disp -= 4;
|
||
op[2] ^= 0x06; /* toggle conditional. */
|
||
op[3] = 3; /* displacement over long branch. */
|
||
disp -= 3;
|
||
op[4] = 0xEE; /* BR $!addr20 */
|
||
op[5] = disp & 0xff;
|
||
op[6] = disp >> 8;
|
||
reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE;
|
||
reloc_adjust = 2;
|
||
break;
|
||
|
||
case OPCODE (OT_bc, 2): /* BC $ - no change. */
|
||
disp -= 2;
|
||
op[1] = disp;
|
||
break;
|
||
|
||
case OPCODE (OT_bc, 5): /* BC $ - long version. */
|
||
disp -= 2;
|
||
op[0] ^= 0x02; /* toggle conditional. */
|
||
op[1] = 3;
|
||
disp -= 3;
|
||
op[2] = 0xEE; /* BR $!addr20 */
|
||
op[3] = disp & 0xff;
|
||
op[4] = disp >> 8;
|
||
reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE;
|
||
reloc_adjust = 2;
|
||
break;
|
||
|
||
case OPCODE (OT_bh, 3): /* BH $ - no change. */
|
||
disp -= 3;
|
||
op[2] = disp;
|
||
break;
|
||
|
||
case OPCODE (OT_bh, 6): /* BC $ - long version. */
|
||
disp -= 3;
|
||
op[1] ^= 0x10; /* toggle conditional. */
|
||
op[2] = 3;
|
||
disp -= 3;
|
||
op[3] = 0xEE; /* BR $!addr20 */
|
||
op[4] = disp & 0xff;
|
||
op[5] = disp >> 8;
|
||
reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE;
|
||
reloc_adjust = 2;
|
||
break;
|
||
|
||
default:
|
||
fprintf(stderr, "Missed case %d %d at 0x%lx\n",
|
||
rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype, mypc);
|
||
abort ();
|
||
|
||
}
|
||
break;
|
||
|
||
default:
|
||
if (rl78b->n_fixups)
|
||
{
|
||
reloc_type = fix->fx_r_type;
|
||
reloc_adjust = 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (rl78b->n_fixups)
|
||
{
|
||
|
||
fix->fx_r_type = reloc_type;
|
||
fix->fx_where += reloc_adjust;
|
||
switch (reloc_type)
|
||
{
|
||
case BFD_RELOC_NONE:
|
||
fix->fx_size = 0;
|
||
break;
|
||
case BFD_RELOC_8:
|
||
fix->fx_size = 1;
|
||
break;
|
||
case BFD_RELOC_16_PCREL:
|
||
fix->fx_size = 2;
|
||
break;
|
||
}
|
||
}
|
||
|
||
fragP->fr_fix = fragP->fr_subtype + (fragP->fr_opcode - fragP->fr_literal);
|
||
tprintf ("fragP->fr_fix now %ld (%d + (%p - %p)\n", (long) fragP->fr_fix,
|
||
fragP->fr_subtype, fragP->fr_opcode, fragP->fr_literal);
|
||
fragP->fr_var = 0;
|
||
|
||
tprintf ("compare 0x%lx vs 0x%lx - 0x%lx = 0x%lx (%p)\n",
|
||
(long)fragP->fr_fix,
|
||
(long)fragP->fr_next->fr_address, (long)fragP->fr_address,
|
||
(long)(fragP->fr_next->fr_address - fragP->fr_address),
|
||
fragP->fr_next);
|
||
|
||
if (fragP->fr_next != NULL
|
||
&& ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
|
||
!= fragP->fr_fix))
|
||
as_bad (_("bad frag at %p : fix %ld addr %ld %ld \n"), fragP,
|
||
(long) fragP->fr_fix,
|
||
(long) fragP->fr_address, (long) fragP->fr_next->fr_address);
|
||
}
|
||
|
||
/* End of relaxation code.
|
||
----------------------------------------------------------------------*/
|
||
|
||
|
||
arelent **
|
||
tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp)
|
||
{
|
||
static arelent * reloc[8];
|
||
int rp;
|
||
|
||
if (fixp->fx_r_type == BFD_RELOC_NONE)
|
||
{
|
||
reloc[0] = NULL;
|
||
return reloc;
|
||
}
|
||
|
||
if (fixp->fx_subsy
|
||
&& S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
|
||
{
|
||
fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy);
|
||
fixp->fx_subsy = NULL;
|
||
}
|
||
|
||
reloc[0] = (arelent *) xmalloc (sizeof (arelent));
|
||
reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
|
||
* reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
|
||
reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where;
|
||
reloc[0]->addend = fixp->fx_offset;
|
||
|
||
if (fixp->fx_r_type == BFD_RELOC_RL78_32_OP
|
||
&& fixp->fx_subsy)
|
||
{
|
||
fixp->fx_r_type = BFD_RELOC_RL78_DIFF;
|
||
}
|
||
|
||
#define OPX(REL,SYM,ADD) \
|
||
reloc[rp] = (arelent *) xmalloc (sizeof (arelent)); \
|
||
reloc[rp]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); \
|
||
reloc[rp]->howto = bfd_reloc_type_lookup (stdoutput, REL); \
|
||
reloc[rp]->addend = ADD; \
|
||
* reloc[rp]->sym_ptr_ptr = SYM; \
|
||
reloc[rp]->address = fixp->fx_frag->fr_address + fixp->fx_where; \
|
||
reloc[++rp] = NULL
|
||
#define OPSYM(SYM) OPX(BFD_RELOC_RL78_SYM, SYM, 0)
|
||
#define OPIMM(IMM) OPX(BFD_RELOC_RL78_SYM, abs_symbol.bsym, IMM)
|
||
#define OP(OP) OPX(BFD_RELOC_RL78_##OP, *reloc[0]->sym_ptr_ptr, 0)
|
||
#define SYM0() reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_SYM)
|
||
|
||
rp = 1;
|
||
|
||
/* Certain BFD relocations cannot be translated directly into
|
||
a single (non-Red Hat) RL78 relocation, but instead need
|
||
multiple RL78 relocations - handle them here. */
|
||
switch (fixp->fx_r_type)
|
||
{
|
||
case BFD_RELOC_RL78_DIFF:
|
||
SYM0 ();
|
||
OPSYM (symbol_get_bfdsym (fixp->fx_subsy));
|
||
OP(OP_SUBTRACT);
|
||
|
||
switch (fixp->fx_size)
|
||
{
|
||
case 1:
|
||
OP(ABS8);
|
||
break;
|
||
case 2:
|
||
OP (ABS16);
|
||
break;
|
||
case 4:
|
||
OP (ABS32);
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_NEG32:
|
||
SYM0 ();
|
||
OP (OP_NEG);
|
||
OP (ABS32);
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_CODE:
|
||
reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_16U);
|
||
reloc[1] = NULL;
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_LO16:
|
||
SYM0 ();
|
||
OPIMM (0xffff);
|
||
OP (OP_AND);
|
||
OP (ABS16);
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_HI16:
|
||
SYM0 ();
|
||
OPIMM (16);
|
||
OP (OP_SHRA);
|
||
OP (ABS16);
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_HI8:
|
||
SYM0 ();
|
||
OPIMM (16);
|
||
OP (OP_SHRA);
|
||
OPIMM (0xff);
|
||
OP (OP_AND);
|
||
OP (ABS8);
|
||
break;
|
||
|
||
default:
|
||
reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
|
||
reloc[1] = NULL;
|
||
break;
|
||
}
|
||
|
||
return reloc;
|
||
}
|
||
|
||
int
|
||
rl78_validate_fix_sub (struct fix * f)
|
||
{
|
||
/* We permit the subtraction of two symbols in a few cases. */
|
||
/* mov #sym1-sym2, R3 */
|
||
if (f->fx_r_type == BFD_RELOC_RL78_32_OP)
|
||
return 1;
|
||
/* .long sym1-sym2 */
|
||
if (f->fx_r_type == BFD_RELOC_RL78_DIFF
|
||
&& ! f->fx_pcrel
|
||
&& (f->fx_size == 4 || f->fx_size == 2 || f->fx_size == 1))
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
long
|
||
md_pcrel_from_section (fixS * fixP, segT sec)
|
||
{
|
||
long rv;
|
||
|
||
if (fixP->fx_addsy != NULL
|
||
&& (! S_IS_DEFINED (fixP->fx_addsy)
|
||
|| S_GET_SEGMENT (fixP->fx_addsy) != sec))
|
||
/* The symbol is undefined (or is defined but not in this section).
|
||
Let the linker figure it out. */
|
||
return 0;
|
||
|
||
rv = fixP->fx_frag->fr_address + fixP->fx_where;
|
||
switch (fixP->fx_r_type)
|
||
{
|
||
case BFD_RELOC_8_PCREL:
|
||
rv += 1;
|
||
break;
|
||
case BFD_RELOC_16_PCREL:
|
||
rv += 2;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
return rv;
|
||
}
|
||
|
||
void
|
||
md_apply_fix (struct fix * f ATTRIBUTE_UNUSED,
|
||
valueT * t ATTRIBUTE_UNUSED,
|
||
segT s ATTRIBUTE_UNUSED)
|
||
{
|
||
char * op;
|
||
unsigned long val;
|
||
|
||
if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1))
|
||
return;
|
||
if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1))
|
||
return;
|
||
|
||
op = f->fx_frag->fr_literal + f->fx_where;
|
||
val = (unsigned long) * t;
|
||
|
||
switch (f->fx_r_type)
|
||
{
|
||
case BFD_RELOC_NONE:
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_RELAX:
|
||
f->fx_done = 1;
|
||
break;
|
||
|
||
case BFD_RELOC_8_PCREL:
|
||
if ((long)val < -128 || (long)val > 127)
|
||
as_bad_where (f->fx_file, f->fx_line,
|
||
_("value of %ld too large for 8-bit branch"),
|
||
val);
|
||
/* Fall through. */
|
||
case BFD_RELOC_8:
|
||
op[0] = val;
|
||
break;
|
||
|
||
case BFD_RELOC_16_PCREL:
|
||
if ((long)val < -32768 || (long)val > 32767)
|
||
as_bad_where (f->fx_file, f->fx_line,
|
||
_("value of %ld too large for 16-bit branch"),
|
||
val);
|
||
/* Fall through. */
|
||
case BFD_RELOC_16:
|
||
case BFD_RELOC_RL78_CODE:
|
||
op[0] = val;
|
||
op[1] = val >> 8;
|
||
break;
|
||
|
||
case BFD_RELOC_24:
|
||
op[0] = val;
|
||
op[1] = val >> 8;
|
||
op[2] = val >> 16;
|
||
break;
|
||
|
||
case BFD_RELOC_32:
|
||
op[0] = val;
|
||
op[1] = val >> 8;
|
||
op[2] = val >> 16;
|
||
op[3] = val >> 24;
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_DIFF:
|
||
op[0] = val;
|
||
if (f->fx_size > 1)
|
||
op[1] = val >> 8;
|
||
if (f->fx_size > 2)
|
||
op[2] = val >> 16;
|
||
if (f->fx_size > 3)
|
||
op[3] = val >> 24;
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_HI8:
|
||
val = val >> 16;
|
||
op[0] = val;
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_HI16:
|
||
val = val >> 16;
|
||
op[0] = val;
|
||
op[1] = val >> 8;
|
||
break;
|
||
|
||
case BFD_RELOC_RL78_LO16:
|
||
op[0] = val;
|
||
op[1] = val >> 8;
|
||
break;
|
||
|
||
default:
|
||
as_bad (_("Unknown reloc in md_apply_fix: %s"),
|
||
bfd_get_reloc_code_name (f->fx_r_type));
|
||
break;
|
||
}
|
||
|
||
if (f->fx_addsy == NULL)
|
||
f->fx_done = 1;
|
||
}
|
||
|
||
valueT
|
||
md_section_align (segT segment, valueT size)
|
||
{
|
||
int align = bfd_get_section_alignment (stdoutput, segment);
|
||
return ((size + (1 << align) - 1) & (-1 << align));
|
||
}
|