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-rw-r--r--gas/config/tc-rl78.c701
1 files changed, 701 insertions, 0 deletions
diff --git a/gas/config/tc-rl78.c b/gas/config/tc-rl78.c
new file mode 100644
index 0000000..07a4cc8
--- /dev/null
+++ b/gas/config/tc-rl78.c
@@ -0,0 +1,701 @@
+/* tc-rl78.c -- Assembler for the Renesas RL78
+ Copyright 2011
+ 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"
+#include "obstack.h"
+#include "safe-ctype.h"
+#include "dwarf2dbg.h"
+#include "libbfd.h"
+#include "elf/common.h"
+#include "elf/rl78.h"
+#include "rl78-defs.h"
+#include "filenames.h"
+#include "listing.h"
+#include "sb.h"
+#include "macro.h"
+
+const char comment_chars[] = ";";
+/* Note that input_file.c hand checks for '#' at the beginning of the
+ first line of the input file. This is because the compiler outputs
+ #NO_APP at the beginning of its output. */
+const char line_comment_chars[] = "#";
+const char line_separator_chars[] = "|";
+
+const char EXP_CHARS[] = "eE";
+const char FLT_CHARS[] = "dD";
+
+/*------------------------------------------------------------------*/
+
+char * rl78_lex_start;
+char * rl78_lex_end;
+
+typedef struct rl78_bytesT
+{
+ char prefix[1];
+ int n_prefix;
+ char base[4];
+ int n_base;
+ char ops[8];
+ int n_ops;
+ struct
+ {
+ expressionS exp;
+ char offset;
+ char nbits;
+ char type; /* RL78REL_*. */
+ int reloc;
+ fixS * fixP;
+ } fixups[2];
+ int n_fixups;
+ struct
+ {
+ char type;
+ char field_pos;
+ char val_ofs;
+ } relax[2];
+ int n_relax;
+ int link_relax;
+ fixS *link_relax_fixP;
+ char times_grown;
+ char times_shrank;
+} rl78_bytesT;
+
+static rl78_bytesT rl78_bytes;
+
+static void
+rl78_fixup (expressionS exp, int offsetbits, int nbits, int type)
+{
+ rl78_bytes.fixups[rl78_bytes.n_fixups].exp = exp;
+ rl78_bytes.fixups[rl78_bytes.n_fixups].offset = offsetbits;
+ rl78_bytes.fixups[rl78_bytes.n_fixups].nbits = nbits;
+ rl78_bytes.fixups[rl78_bytes.n_fixups].type = type;
+ rl78_bytes.fixups[rl78_bytes.n_fixups].reloc = exp.X_md;
+ rl78_bytes.n_fixups ++;
+}
+
+#define rl78_field_fixup(exp, offset, nbits, type) \
+ rl78_fixup (exp, offset + 8 * rl78_bytes.n_prefix), nbits, type)
+
+#define rl78_op_fixup(exp, offset, nbits, type) \
+ rl78_fixup (exp, offset + 8 * (rl78_bytes.n_prefix + rl78_bytes.n_base), nbits, type)
+
+void
+rl78_prefix (int p)
+{
+ rl78_bytes.prefix[0] = p;
+ rl78_bytes.n_prefix = 1;
+}
+
+int
+rl78_has_prefix ()
+{
+ return rl78_bytes.n_prefix;
+}
+
+void
+rl78_base1 (int b1)
+{
+ rl78_bytes.base[0] = b1;
+ rl78_bytes.n_base = 1;
+}
+
+void
+rl78_base2 (int b1, int b2)
+{
+ rl78_bytes.base[0] = b1;
+ rl78_bytes.base[1] = b2;
+ rl78_bytes.n_base = 2;
+}
+
+void
+rl78_base3 (int b1, int b2, int b3)
+{
+ rl78_bytes.base[0] = b1;
+ rl78_bytes.base[1] = b2;
+ rl78_bytes.base[2] = b3;
+ rl78_bytes.n_base = 3;
+}
+
+void
+rl78_base4 (int b1, int b2, int b3, int b4)
+{
+ rl78_bytes.base[0] = b1;
+ rl78_bytes.base[1] = b2;
+ rl78_bytes.base[2] = b3;
+ rl78_bytes.base[3] = b4;
+ rl78_bytes.n_base = 4;
+}
+
+#define F_PRECISION 2
+
+void
+rl78_op (expressionS exp, int nbytes, int type)
+{
+ int v = 0;
+
+ if ((exp.X_op == O_constant || exp.X_op == O_big)
+ && type != RL78REL_PCREL)
+ {
+ if (exp.X_op == O_big && exp.X_add_number <= 0)
+ {
+ LITTLENUM_TYPE w[2];
+ char * ip = rl78_bytes.ops + rl78_bytes.n_ops;
+
+ gen_to_words (w, F_PRECISION, 8);
+ ip[3] = w[0] >> 8;
+ ip[2] = w[0];
+ ip[1] = w[1] >> 8;
+ ip[0] = w[1];
+ rl78_bytes.n_ops += 4;
+ }
+ else
+ {
+ v = exp.X_add_number;
+ while (nbytes)
+ {
+ rl78_bytes.ops[rl78_bytes.n_ops++] =v & 0xff;
+ v >>= 8;
+ nbytes --;
+ }
+ }
+ }
+ else
+ {
+ rl78_op_fixup (exp, rl78_bytes.n_ops * 8, nbytes * 8, type);
+ memset (rl78_bytes.ops + rl78_bytes.n_ops, 0, nbytes);
+ rl78_bytes.n_ops += nbytes;
+ }
+}
+
+/* This gets complicated when the field spans bytes, because fields
+ are numbered from the MSB of the first byte as zero, and bits are
+ 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
+ insertion of b'MXL at position 7 is like this:
+
+ - - - - - - - - - - - - - - - -
+ M X L */
+
+void
+rl78_field (int val, int pos, int sz)
+{
+ int valm;
+ int bytep, bitp;
+
+ if (sz > 0)
+ {
+ if (val < 0 || val >= (1 << sz))
+ as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz);
+ }
+ else
+ {
+ sz = - sz;
+ if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1)))
+ 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)
+ {
+ int ssz = 8 - bitp;
+ int svalm;
+
+ svalm = val >> (sz - ssz);
+ svalm = svalm & ((1 << ssz) - 1);
+ svalm = svalm << (8 - bitp - ssz);
+ gas_assert (bytep < rl78_bytes.n_base);
+ rl78_bytes.base[bytep] |= svalm;
+
+ bitp = 0;
+ sz -= ssz;
+ bytep ++;
+ }
+ valm = val & ((1 << sz) - 1);
+ valm = valm << (8 - bitp - sz);
+ gas_assert (bytep < rl78_bytes.n_base);
+ rl78_bytes.base[bytep] |= valm;
+}
+
+/*------------------------------------------------------------------*/
+
+#define RL78_SHORTOPTS ""
+const char * md_shortopts = RL78_SHORTOPTS;
+
+/* Assembler options. */
+struct option md_longopts[] =
+{
+ {NULL, no_argument, NULL, 0}
+};
+size_t md_longopts_size = sizeof (md_longopts);
+
+int
+md_parse_option (int c ATTRIBUTE_UNUSED, char * arg ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+void
+md_show_usage (FILE * stream ATTRIBUTE_UNUSED)
+{
+}
+
+
+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 ();
+}
+
+/* The target specific pseudo-ops which we support. */
+const pseudo_typeS md_pseudo_table[] =
+{
+ /* Our "standard" pseudos. */
+ { "double", 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)
+{
+}
+
+/* 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 struct
+{
+ char * fname;
+ int reloc;
+}
+reloc_functions[] =
+{
+ { "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;
+}
+
+void
+rl78_frag_init (fragS * fragP)
+{
+ fragP->tc_frag_data = 0;
+}
+
+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 ();
+
+ 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);
+
+ 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;
+
+ 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;
+ }
+
+ 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;
+ }
+
+ fix_new_exp (frag, where, (int) size, exp, 0, type);
+}
+
+/* No relaxation just yet */
+int
+md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+arelent **
+tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp)
+{
+ static arelent * reloc[8];
+ int rp;
+ int is_opcode = 0;
+
+ 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;
+ is_opcode = 1;
+ }
+
+#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_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_8:
+ case BFD_RELOC_8_PCREL:
+ op[0] = val;
+ break;
+
+ case BFD_RELOC_16:
+ case BFD_RELOC_16_PCREL:
+ 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:
+ case BFD_RELOC_RL78_DIFF:
+ op[0] = val;
+ op[1] = val >> 8;
+ op[2] = val >> 16;
+ op[3] = val >> 24;
+ 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));
+}
+
+void
+md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
+ segT segment ATTRIBUTE_UNUSED,
+ fragS * fragP ATTRIBUTE_UNUSED)
+{
+ /* No relaxation yet */
+}
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