/* Defines section. */
-#define MAX_FLAG_NAME_LENGHT 3
#define MAX_INSN_FIXUPS 2
#define MAX_CONSTR_STR 20
+#define FRAG_MAX_GROWTH 8
#ifdef DEBUG
# define pr_debug(fmt, args...) fprintf (stderr, fmt, ##args)
#define MAJOR_OPCODE(x) (((x) & 0xF8000000) >> 27)
#define SUB_OPCODE(x) (((x) & 0x003F0000) >> 16)
-#define LP_INSN(x) ((MAJOR_OPCODE (x) == 0x4) && \
+#define LP_INSN(x) ((MAJOR_OPCODE (x) == 0x4) && \
(SUB_OPCODE (x) == 0x28))
/* Equal to MAX_PRECISION in atof-ieee.c. */
#define MAX_LITTLENUMS 6
+/* Enum used to enumerate the relaxable ins operands. */
+enum rlx_operand_type
+{
+ EMPTY = 0,
+ REGISTER,
+ REGISTER_S, /* Register for short instruction(s). */
+ REGISTER_NO_GP, /* Is a register but not gp register specifically. */
+ REGISTER_DUP, /* Duplication of previous operand of type register. */
+ IMMEDIATE,
+ BRACKET
+};
+
+enum arc_rlx_types
+{
+ ARC_RLX_NONE = 0,
+ ARC_RLX_BL_S,
+ ARC_RLX_BL,
+ ARC_RLX_B_S,
+ ARC_RLX_B,
+ ARC_RLX_ADD_U3,
+ ARC_RLX_ADD_U6,
+ ARC_RLX_ADD_LIMM,
+ ARC_RLX_LD_U7,
+ ARC_RLX_LD_S9,
+ ARC_RLX_LD_LIMM,
+ ARC_RLX_MOV_U8,
+ ARC_RLX_MOV_S12,
+ ARC_RLX_MOV_LIMM,
+ ARC_RLX_SUB_U3,
+ ARC_RLX_SUB_U6,
+ ARC_RLX_SUB_LIMM,
+ ARC_RLX_MPY_U6,
+ ARC_RLX_MPY_LIMM,
+ ARC_RLX_MOV_RU6,
+ ARC_RLX_MOV_RLIMM,
+ ARC_RLX_ADD_RRU6,
+ ARC_RLX_ADD_RRLIMM,
+};
+
/* Macros section. */
#define regno(x) ((x) & 0x3F)
const char *arc_target_format = DEFAULT_TARGET_FORMAT;
static int byte_order = DEFAULT_BYTE_ORDER;
+/* By default relaxation is disabled. */
+static int relaxation_state = 0;
+
extern int arc_get_mach (char *);
-/* Forward declaration. */
+/* Forward declarations. */
static void arc_lcomm (int);
static void arc_option (int);
static void arc_extra_reloc (int);
+
const pseudo_typeS md_pseudo_table[] =
{
/* Make sure that .word is 32 bits. */
OPTION_MCPU,
OPTION_CD,
+ OPTION_RELAX,
/* The following options are deprecated and provided here only for
compatibility reasons. */
{ "mEM", no_argument, NULL, OPTION_ARCEM },
{ "mHS", no_argument, NULL, OPTION_ARCHS },
{ "mcode-density", no_argument, NULL, OPTION_CD },
+ { "mrelax", no_argument, NULL, OPTION_RELAX },
/* The following options are deprecated and provided here only for
compatibility reasons. */
short. */
bfd_boolean has_limm; /* Boolean value: TRUE if limm field is
valid. */
+ bfd_boolean relax; /* Boolean value: TRUE if needs
+ relaxation. */
};
/* Structure to hold any last two instructions. */
bfd_boolean has_delay_slot;
} arc_last_insns[2];
+/* Forward declaration. */
+static void assemble_insn
+ (const struct arc_opcode *, const expressionS *, int,
+ const struct arc_flags *, int, struct arc_insn *);
+
/* The cpu for which we are generating code. */
static unsigned arc_target = ARC_OPCODE_BASE;
static const char *arc_target_name = "<all>";
{ 0, 0, 0, 0, 0 }
};
-struct arc_flags
-{
- /* Name of the parsed flag. */
- char name[MAX_FLAG_NAME_LENGHT+1];
-
- /* The code of the parsed flag. Valid when is not zero. */
- unsigned char code;
-};
-
/* Used by the arc_reloc_op table. Order is important. */
#define O_gotoff O_md1 /* @gotoff relocation. */
#define O_gotpc O_md2 /* @gotpc relocation. */
static const int arc_num_reloc_op
= sizeof (arc_reloc_op) / sizeof (*arc_reloc_op);
+/* Structure for relaxable instruction that have to be swapped with a
+ smaller alternative instruction. */
+struct arc_relaxable_ins
+{
+ /* Mnemonic that should be checked. */
+ const char *mnemonic_r;
+
+ /* Operands that should be checked.
+ Indexes of operands from operand array. */
+ enum rlx_operand_type operands[6];
+
+ /* Flags that should be checked. */
+ unsigned flag_classes[5];
+
+ /* Mnemonic (smaller) alternative to be used later for relaxation. */
+ const char *mnemonic_alt;
+
+ /* Index of operand that generic relaxation has to check. */
+ unsigned opcheckidx;
+
+ /* Base subtype index used. */
+ enum arc_rlx_types subtype;
+};
+
+#define RELAX_TABLE_ENTRY(BITS, ISSIGNED, SIZE, NEXT) \
+ { (ISSIGNED) ? ((1 << ((BITS) - 1)) - 1) : ((1 << (BITS)) - 1), \
+ (ISSIGNED) ? -(1 << ((BITS) - 1)) : 0, \
+ (SIZE), \
+ (NEXT) } \
+
+#define RELAX_TABLE_ENTRY_MAX(ISSIGNED, SIZE, NEXT) \
+ { (ISSIGNED) ? 0x7FFFFFFF : 0xFFFFFFFF, \
+ (ISSIGNED) ? -(0x7FFFFFFF) : 0, \
+ (SIZE), \
+ (NEXT) } \
+
+
+/* ARC relaxation table. */
+const relax_typeS md_relax_table[] =
+{
+ /* Fake entry. */
+ {0, 0, 0, 0},
+
+ /* BL_S s13 ->
+ BL s25. */
+ RELAX_TABLE_ENTRY(13, 1, 2, ARC_RLX_BL),
+ RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE),
+
+ /* B_S s10 ->
+ B s25. */
+ RELAX_TABLE_ENTRY(10, 1, 2, ARC_RLX_B),
+ RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE),
+
+ /* ADD_S c,b, u3 ->
+ ADD<.f> a,b,u6 ->
+ ADD<.f> a,b,limm. */
+ RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_ADD_U6),
+ RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_LIMM),
+ RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
+
+ /* LD_S a, [b, u7] ->
+ LD<zz><.x><.aa><.di> a, [b, s9] ->
+ LD<zz><.x><.aa><.di> a, [b, limm] */
+ RELAX_TABLE_ENTRY(7, 0, 2, ARC_RLX_LD_S9),
+ RELAX_TABLE_ENTRY(9, 1, 4, ARC_RLX_LD_LIMM),
+ RELAX_TABLE_ENTRY_MAX(1, 8, ARC_RLX_NONE),
+
+ /* MOV_S b, u8 ->
+ MOV<.f> b, s12 ->
+ MOV<.f> b, limm. */
+ RELAX_TABLE_ENTRY(8, 0, 2, ARC_RLX_MOV_S12),
+ RELAX_TABLE_ENTRY(8, 0, 4, ARC_RLX_MOV_LIMM),
+ RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
+
+ /* SUB_S c, b, u3 ->
+ SUB<.f> a, b, u6 ->
+ SUB<.f> a, b, limm. */
+ RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_SUB_U6),
+ RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_SUB_LIMM),
+ RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
+
+ /* MPY<.f> a, b, u6 ->
+ MPY<.f> a, b, limm. */
+ RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MPY_LIMM),
+ RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
+
+ /* MOV<.f><.cc> b, u6 ->
+ MOV<.f><.cc> b, limm. */
+ RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MOV_RLIMM),
+ RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
+
+ /* ADD<.f><.cc> b, b, u6 ->
+ ADD<.f><.cc> b, b, limm. */
+ RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_RRLIMM),
+ RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
+};
+
+/* Order of this table's entries matters! */
+const struct arc_relaxable_ins arc_relaxable_insns[] =
+{
+ { "bl", { IMMEDIATE }, { 0 }, "bl_s", 0, ARC_RLX_BL_S },
+ { "b", { IMMEDIATE }, { 0 }, "b_s", 0, ARC_RLX_B_S },
+ { "add", { REGISTER, REGISTER_DUP, IMMEDIATE }, { 5, 1, 0 }, "add",
+ 2, ARC_RLX_ADD_RRU6},
+ { "add", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "add_s", 2,
+ ARC_RLX_ADD_U3 },
+ { "add", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "add", 2,
+ ARC_RLX_ADD_U6 },
+ { "ld", { REGISTER_S, BRACKET, REGISTER_S, IMMEDIATE, BRACKET },
+ { 0 }, "ld_s", 3, ARC_RLX_LD_U7 },
+ { "ld", { REGISTER, BRACKET, REGISTER_NO_GP, IMMEDIATE, BRACKET },
+ { 11, 4, 14, 17, 0 }, "ld", 3, ARC_RLX_LD_S9 },
+ { "mov", { REGISTER_S, IMMEDIATE }, { 0 }, "mov_s", 1, ARC_RLX_MOV_U8 },
+ { "mov", { REGISTER, IMMEDIATE }, { 5, 0 }, "mov", 1, ARC_RLX_MOV_S12 },
+ { "mov", { REGISTER, IMMEDIATE }, { 5, 1, 0 },"mov", 1, ARC_RLX_MOV_RU6 },
+ { "sub", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "sub_s", 2,
+ ARC_RLX_SUB_U3 },
+ { "sub", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "sub", 2,
+ ARC_RLX_SUB_U6 },
+ { "mpy", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "mpy", 2,
+ ARC_RLX_MPY_U6 },
+};
+
+const unsigned arc_num_relaxable_ins = ARRAY_SIZE (arc_relaxable_insns);
+
/* Flags to set in the elf header. */
static flagword arc_eflag = 0x00;
/* Set to TRUE when we assemble instructions. */
static bfd_boolean assembling_insn = FALSE;
-/* Functions declaration. */
-
-static void assemble_tokens (const char *, expressionS *, int,
- struct arc_flags *, int);
-static const struct arc_opcode *find_opcode_match (const struct arc_opcode *,
- expressionS *, int *,
- struct arc_flags *,
- int, int *);
-static void assemble_insn (const struct arc_opcode *, const expressionS *,
- int, const struct arc_flags *, int,
- struct arc_insn *);
-static void emit_insn (struct arc_insn *);
-static unsigned insert_operand (unsigned, const struct arc_operand *,
- offsetT, char *, unsigned);
-static const struct arc_opcode *find_special_case_flag (const char *,
- int *,
- struct arc_flags *);
-static const struct arc_opcode *find_special_case (const char *,
- int *,
- struct arc_flags *,
- expressionS *, int *);
-static const struct arc_opcode *find_special_case_pseudo (const char *,
- int *,
- expressionS *,
- int *,
- struct arc_flags *);
-
/* Functions implementation. */
/* Like md_number_to_chars but used for limms. The 4-byte limm value,
return -1;
}
-/* The public interface to the instruction assembler. */
+/* Apply the fixups in order. */
-void
-md_assemble (char *str)
+static void
+apply_fixups (struct arc_insn *insn, fragS *fragP, int fix)
{
- char *opname;
- expressionS tok[MAX_INSN_ARGS];
- int ntok, nflg;
- size_t opnamelen;
- struct arc_flags flags[MAX_INSN_FLGS];
-
- /* Split off the opcode. */
- opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_0123468");
- opname = xmalloc (opnamelen + 1);
- memcpy (opname, str, opnamelen);
- opname[opnamelen] = '\0';
-
- /* Signalize we are assmbling the instructions. */
- assembling_insn = TRUE;
-
- /* Tokenize the flags. */
- if ((nflg = tokenize_flags (str + opnamelen, flags, MAX_INSN_FLGS)) == -1)
- {
- as_bad (_("syntax error"));
- return;
- }
-
- /* Scan up to the end of the mnemonic which must end in space or end
- of string. */
- str += opnamelen;
- for (; *str != '\0'; str++)
- if (*str == ' ')
- break;
+ int i;
- /* Tokenize the rest of the line. */
- if ((ntok = tokenize_arguments (str, tok, MAX_INSN_ARGS)) < 0)
+ for (i = 0; i < insn->nfixups; i++)
{
- as_bad (_("syntax error"));
- return;
- }
+ struct arc_fixup *fixup = &insn->fixups[i];
+ int size, pcrel, offset = 0;
- /* Finish it off. */
- assemble_tokens (opname, tok, ntok, flags, nflg);
- assembling_insn = FALSE;
-}
+ /* FIXME! the reloc size is wrong in the BFD file.
+ When it is fixed please delete me. */
+ size = (insn->short_insn && !fixup->islong) ? 2 : 4;
-/* Callback to insert a register into the hash table. */
+ if (fixup->islong)
+ offset = (insn->short_insn) ? 2 : 4;
-static void
-declare_register (char *name, int number)
-{
- const char *err;
- symbolS *regS = symbol_create (name, reg_section,
- number, &zero_address_frag);
+ /* Some fixups are only used internally, thus no howto. */
+ if ((int) fixup->reloc == 0)
+ as_fatal (_("Unhandled reloc type"));
- err = hash_insert (arc_reg_hash, S_GET_NAME (regS), (void *) regS);
- if (err)
- as_fatal ("Inserting \"%s\" into register table failed: %s",
- name, err);
-}
+ if ((int) fixup->reloc < 0)
+ {
+ /* FIXME! the reloc size is wrong in the BFD file.
+ When it is fixed please enable me.
+ size = (insn->short_insn && !fixup->islong) ? 2 : 4; */
+ pcrel = fixup->pcrel;
+ }
+ else
+ {
+ reloc_howto_type *reloc_howto =
+ bfd_reloc_type_lookup (stdoutput,
+ (bfd_reloc_code_real_type) fixup->reloc);
+ gas_assert (reloc_howto);
-/* Construct symbols for each of the general registers. */
+ /* FIXME! the reloc size is wrong in the BFD file.
+ When it is fixed please enable me.
+ size = bfd_get_reloc_size (reloc_howto); */
+ pcrel = reloc_howto->pc_relative;
+ }
-static void
-declare_register_set (void)
-{
- int i;
- for (i = 0; i < 64; ++i)
- {
- char name[7];
+ pr_debug ("%s:%d: apply_fixups: new %s fixup (PCrel:%s) of size %d @ \
+offset %d + %d\n",
+ fragP->fr_file, fragP->fr_line,
+ (fixup->reloc < 0) ? "Internal" :
+ bfd_get_reloc_code_name (fixup->reloc),
+ pcrel ? "Y" : "N",
+ size, fix, offset);
+ fix_new_exp (fragP, fix + offset,
+ size, &fixup->exp, pcrel, fixup->reloc);
- sprintf (name, "r%d", i);
- declare_register (name, i);
- if ((i & 0x01) == 0)
+ /* Check for ZOLs, and update symbol info if any. */
+ if (LP_INSN (insn->insn))
{
- sprintf (name, "r%dr%d", i, i+1);
- declare_register (name, i);
+ gas_assert (fixup->exp.X_add_symbol);
+ ARC_SET_FLAG (fixup->exp.X_add_symbol, ARC_FLAG_ZOL);
}
}
}
-/* Port-specific assembler initialization. This function is called
- once, at assembler startup time. */
+/* Actually output an instruction with its fixup. */
-void
-md_begin (void)
+static void
+emit_insn0 (struct arc_insn *insn, char *where, bfd_boolean relax)
{
- unsigned int i;
-
- /* The endianness can be chosen "at the factory". */
- target_big_endian = byte_order == BIG_ENDIAN;
-
- if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type))
- as_warn (_("could not set architecture and machine"));
-
- /* Set elf header flags. */
- bfd_set_private_flags (stdoutput, arc_eflag);
+ char *f = where;
- /* Set up a hash table for the instructions. */
- arc_opcode_hash = hash_new ();
- if (arc_opcode_hash == NULL)
- as_fatal (_("Virtual memory exhausted"));
+ pr_debug ("Emit insn : 0x%x\n", insn->insn);
+ pr_debug ("\tShort : 0x%d\n", insn->short_insn);
+ pr_debug ("\tLong imm: 0x%lx\n", insn->limm);
- /* Initialize the hash table with the insns. */
- for (i = 0; i < arc_num_opcodes;)
+ /* Write out the instruction. */
+ if (insn->short_insn)
{
- const char *name, *retval;
-
- name = arc_opcodes[i].name;
- retval = hash_insert (arc_opcode_hash, name, (void *) &arc_opcodes[i]);
- if (retval)
- as_fatal (_("internal error: can't hash opcode '%s': %s"),
- name, retval);
-
- while (++i < arc_num_opcodes
- && (arc_opcodes[i].name == name
- || !strcmp (arc_opcodes[i].name, name)))
- continue;
+ if (insn->has_limm)
+ {
+ if (!relax)
+ f = frag_more (6);
+ md_number_to_chars (f, insn->insn, 2);
+ md_number_to_chars_midend (f + 2, insn->limm, 4);
+ dwarf2_emit_insn (6);
+ }
+ else
+ {
+ if (!relax)
+ f = frag_more (2);
+ md_number_to_chars (f, insn->insn, 2);
+ dwarf2_emit_insn (2);
+ }
+ }
+ else
+ {
+ if (insn->has_limm)
+ {
+ if (!relax)
+ f = frag_more (8);
+ md_number_to_chars_midend (f, insn->insn, 4);
+ md_number_to_chars_midend (f + 4, insn->limm, 4);
+ dwarf2_emit_insn (8);
+ }
+ else
+ {
+ if (!relax)
+ f = frag_more (4);
+ md_number_to_chars_midend (f, insn->insn, 4);
+ dwarf2_emit_insn (4);
+ }
}
- /* Register declaration. */
- arc_reg_hash = hash_new ();
- if (arc_reg_hash == NULL)
- as_fatal (_("Virtual memory exhausted"));
+ if (!relax)
+ apply_fixups (insn, frag_now, (f - frag_now->fr_literal));
+}
- declare_register_set ();
- declare_register ("gp", 26);
- declare_register ("fp", 27);
- declare_register ("sp", 28);
- declare_register ("ilink", 29);
- declare_register ("ilink1", 29);
- declare_register ("ilink2", 30);
- declare_register ("blink", 31);
+static void
+emit_insn1 (struct arc_insn *insn)
+{
+ /* How frag_var's args are currently configured:
+ - rs_machine_dependent, to dictate it's a relaxation frag.
+ - FRAG_MAX_GROWTH, maximum size of instruction
+ - 0, variable size that might grow...unused by generic relaxation.
+ - frag_now->fr_subtype, fr_subtype starting value, set previously.
+ - s, opand expression.
+ - 0, offset but it's unused.
+ - 0, opcode but it's unused. */
+ symbolS *s = make_expr_symbol (&insn->fixups[0].exp);
+ frag_now->tc_frag_data.pcrel = insn->fixups[0].pcrel;
+
+ if (frag_room () < FRAG_MAX_GROWTH)
+ {
+ /* Handle differently when frag literal memory is exhausted.
+ This is used because when there's not enough memory left in
+ the current frag, a new frag is created and the information
+ we put into frag_now->tc_frag_data is disregarded. */
- declare_register ("mlo", 57);
- declare_register ("mmid", 58);
- declare_register ("mhi", 59);
+ struct arc_relax_type relax_info_copy;
+ relax_substateT subtype = frag_now->fr_subtype;
- declare_register ("acc1", 56);
- declare_register ("acc2", 57);
+ memcpy (&relax_info_copy, &frag_now->tc_frag_data,
+ sizeof (struct arc_relax_type));
- declare_register ("lp_count", 60);
- declare_register ("pcl", 63);
+ frag_wane (frag_now);
+ frag_grow (FRAG_MAX_GROWTH);
- /* Initialize the last instructions. */
- memset (&arc_last_insns[0], 0, sizeof (arc_last_insns));
-}
+ memcpy (&frag_now->tc_frag_data, &relax_info_copy,
+ sizeof (struct arc_relax_type));
-/* Write a value out to the object file, using the appropriate
- endianness. */
+ frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
+ subtype, s, 0, 0);
+ }
+ else
+ frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
+ frag_now->fr_subtype, s, 0, 0);
+}
-void
-md_number_to_chars (char *buf,
- valueT val,
- int n)
+static void
+emit_insn (struct arc_insn *insn)
{
- if (target_big_endian)
- number_to_chars_bigendian (buf, val, n);
+ if (insn->relax)
+ emit_insn1 (insn);
else
- number_to_chars_littleendian (buf, val, n);
+ emit_insn0 (insn, NULL, FALSE);
}
-/* Round up a section size to the appropriate boundary. */
+/* Check whether a symbol involves a register. */
-valueT
-md_section_align (segT segment,
- valueT size)
+static bfd_boolean
+contains_register (symbolS *sym)
{
- int align = bfd_get_section_alignment (stdoutput, segment);
+ if (sym)
+ {
+ expressionS *ex = symbol_get_value_expression (sym);
- return ((size + (1 << align) - 1) & (-((valueT) 1 << align)));
+ return ((O_register == ex->X_op)
+ && !contains_register (ex->X_add_symbol)
+ && !contains_register (ex->X_op_symbol));
+ }
+
+ return FALSE;
}
-/* The location from which a PC relative jump should be calculated,
- given a PC relative reloc. */
+/* Returns the register number within a symbol. */
-long
-md_pcrel_from_section (fixS *fixP,
- segT sec)
+static int
+get_register (symbolS *sym)
{
- offsetT base = fixP->fx_where + fixP->fx_frag->fr_address;
-
- pr_debug ("pcrel_from_section, fx_offset = %d\n", (int) fixP->fx_offset);
+ if (!contains_register (sym))
+ return -1;
- if (fixP->fx_addsy != (symbolS *) NULL
- && (!S_IS_DEFINED (fixP->fx_addsy)
- || S_GET_SEGMENT (fixP->fx_addsy) != sec))
- {
- pr_debug ("Unknown pcrel symbol: %s\n", S_GET_NAME (fixP->fx_addsy));
+ expressionS *ex = symbol_get_value_expression (sym);
+ return regno (ex->X_add_number);
+}
- /* The symbol is undefined (or is defined but not in this section).
- Let the linker figure it out. */
- return 0;
- }
+/* Return true if a RELOC is generic. A generic reloc is PC-rel of a
+ simple ME relocation (e.g. RELOC_ARC_32_ME, BFD_RELOC_ARC_PC32. */
- if ((int) fixP->fx_r_type < 0)
- {
- /* These are the "internal" relocations. Align them to
- 32 bit boundary (PCL), for the moment. */
- base &= ~3;
- }
- else
- {
- switch (fixP->fx_r_type)
- {
- case BFD_RELOC_ARC_PC32:
- /* The hardware calculates relative to the start of the
- insn, but this relocation is relative to location of the
- LIMM, compensate. The base always needs to be
- substracted by 4 as we do not support this type of PCrel
- relocation for short instructions. */
- base -= 4;
- /* Fall through. */
- case BFD_RELOC_ARC_PLT32:
- case BFD_RELOC_ARC_S25H_PCREL_PLT:
- case BFD_RELOC_ARC_S21H_PCREL_PLT:
- case BFD_RELOC_ARC_S25W_PCREL_PLT:
- case BFD_RELOC_ARC_S21W_PCREL_PLT:
+static bfd_boolean
+generic_reloc_p (extended_bfd_reloc_code_real_type reloc)
+{
+ if (!reloc)
+ return FALSE;
- case BFD_RELOC_ARC_S21H_PCREL:
- case BFD_RELOC_ARC_S25H_PCREL:
- case BFD_RELOC_ARC_S13_PCREL:
- case BFD_RELOC_ARC_S21W_PCREL:
- case BFD_RELOC_ARC_S25W_PCREL:
- base &= ~3;
- break;
- default:
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("unhandled reloc %s in md_pcrel_from_section"),
- bfd_get_reloc_code_name (fixP->fx_r_type));
- break;
- }
+ switch (reloc)
+ {
+ case BFD_RELOC_ARC_SDA_LDST:
+ case BFD_RELOC_ARC_SDA_LDST1:
+ case BFD_RELOC_ARC_SDA_LDST2:
+ case BFD_RELOC_ARC_SDA16_LD:
+ case BFD_RELOC_ARC_SDA16_LD1:
+ case BFD_RELOC_ARC_SDA16_LD2:
+ case BFD_RELOC_ARC_SDA16_ST2:
+ case BFD_RELOC_ARC_SDA32_ME:
+ return FALSE;
+ default:
+ return TRUE;
}
-
- pr_debug ("pcrel from %x + %lx = %x, symbol: %s (%x)\n",
- fixP->fx_frag->fr_address, fixP->fx_where, base,
- fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "(null)",
- fixP->fx_addsy ? S_GET_VALUE (fixP->fx_addsy) : 0);
-
- return base;
}
-/* Given a BFD relocation find the coresponding operand. */
+/* Allocates a tok entry. */
-static const struct arc_operand *
-find_operand_for_reloc (extended_bfd_reloc_code_real_type reloc)
+static int
+allocate_tok (expressionS *tok, int ntok, int cidx)
{
- unsigned i;
+ if (ntok > MAX_INSN_ARGS - 2)
+ return 0; /* No space left. */
- for (i = 0; i < arc_num_operands; i++)
- if (arc_operands[i].default_reloc == reloc)
- return &arc_operands[i];
- return NULL;
-}
+ if (cidx > ntok)
+ return 0; /* Incorect args. */
-/* Apply a fixup to the object code. At this point all symbol values
- should be fully resolved, and we attempt to completely resolve the
- reloc. If we can not do that, we determine the correct reloc code
- and put it back in the fixup. To indicate that a fixup has been
- eliminated, set fixP->fx_done. */
+ memcpy (&tok[ntok+1], &tok[ntok], sizeof (*tok));
-void
-md_apply_fix (fixS *fixP,
- valueT *valP,
- segT seg)
-{
- char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
- valueT value = *valP;
- unsigned insn = 0;
- symbolS *fx_addsy, *fx_subsy;
- offsetT fx_offset;
- segT add_symbol_segment = absolute_section;
- segT sub_symbol_segment = absolute_section;
- const struct arc_operand *operand = NULL;
- extended_bfd_reloc_code_real_type reloc;
+ if (cidx == ntok)
+ return 1; /* Success. */
+ return allocate_tok (tok, ntok - 1, cidx);
+}
- pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
- fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
- ((int) fixP->fx_r_type < 0) ? "Internal":
- bfd_get_reloc_code_name (fixP->fx_r_type), value,
- fixP->fx_offset);
+/* Search forward through all variants of an opcode looking for a
+ syntax match. */
- fx_addsy = fixP->fx_addsy;
- fx_subsy = fixP->fx_subsy;
- fx_offset = 0;
+static const struct arc_opcode *
+find_opcode_match (const struct arc_opcode *first_opcode,
+ expressionS *tok,
+ int *pntok,
+ struct arc_flags *first_pflag,
+ int nflgs,
+ int *pcpumatch)
+{
+ const struct arc_opcode *opcode = first_opcode;
+ int ntok = *pntok;
+ int got_cpu_match = 0;
+ expressionS bktok[MAX_INSN_ARGS];
+ int bkntok;
+ expressionS emptyE;
- if (fx_addsy)
- {
- add_symbol_segment = S_GET_SEGMENT (fx_addsy);
- }
+ memset (&emptyE, 0, sizeof (emptyE));
+ memcpy (bktok, tok, MAX_INSN_ARGS * sizeof (*tok));
+ bkntok = ntok;
- if (fx_subsy
- && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF
- && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF_S9
- && fixP->fx_r_type != BFD_RELOC_ARC_TLS_GD_LD)
+ do
{
- resolve_symbol_value (fx_subsy);
- sub_symbol_segment = S_GET_SEGMENT (fx_subsy);
+ const unsigned char *opidx;
+ const unsigned char *flgidx;
+ int tokidx = 0;
+ const expressionS *t = &emptyE;
- if (sub_symbol_segment == absolute_section)
- {
- /* The symbol is really a constant. */
- fx_offset -= S_GET_VALUE (fx_subsy);
- fx_subsy = NULL;
- }
- else
- {
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("can't resolve `%s' {%s section} - `%s' {%s section}"),
- fx_addsy ? S_GET_NAME (fx_addsy) : "0",
- segment_name (add_symbol_segment),
- S_GET_NAME (fx_subsy),
- segment_name (sub_symbol_segment));
- return;
- }
- }
+ pr_debug ("%s:%d: find_opcode_match: trying opcode 0x%08X ",
+ frag_now->fr_file, frag_now->fr_line, opcode->opcode);
- if (fx_addsy
- && !S_IS_WEAK (fx_addsy))
- {
- if (add_symbol_segment == seg
- && fixP->fx_pcrel)
- {
- value += S_GET_VALUE (fx_addsy);
- value -= md_pcrel_from_section (fixP, seg);
- fx_addsy = NULL;
- fixP->fx_pcrel = FALSE;
- }
- else if (add_symbol_segment == absolute_section)
- {
- value = fixP->fx_offset;
- fx_offset += S_GET_VALUE (fixP->fx_addsy);
- fx_addsy = NULL;
- fixP->fx_pcrel = FALSE;
- }
- }
+ /* Don't match opcodes that don't exist on this
+ architecture. */
+ if (!(opcode->cpu & arc_target))
+ goto match_failed;
- if (!fx_addsy)
- fixP->fx_done = TRUE;
+ if (is_code_density_p (opcode) && !(arc_features & ARC_CD))
+ goto match_failed;
- if (fixP->fx_pcrel)
- {
- if (fx_addsy
- && ((S_IS_DEFINED (fx_addsy)
- && S_GET_SEGMENT (fx_addsy) != seg)
- || S_IS_WEAK (fx_addsy)))
- value += md_pcrel_from_section (fixP, seg);
+ got_cpu_match = 1;
+ pr_debug ("cpu ");
- switch (fixP->fx_r_type)
+ /* Check the operands. */
+ for (opidx = opcode->operands; *opidx; ++opidx)
{
- case BFD_RELOC_ARC_32_ME:
- /* This is a pc-relative value in a LIMM. Adjust it to the
- address of the instruction not to the address of the
- LIMM. Note: it is not anylonger valid this afirmation as
- the linker consider ARC_PC32 a fixup to entire 64 bit
- insn. */
- fixP->fx_offset += fixP->fx_frag->fr_address;
- /* Fall through. */
- case BFD_RELOC_32:
- fixP->fx_r_type = BFD_RELOC_ARC_PC32;
- /* Fall through. */
- case BFD_RELOC_ARC_PC32:
- /* fixP->fx_offset += fixP->fx_where - fixP->fx_dot_value; */
- break;
- default:
- if ((int) fixP->fx_r_type < 0)
- as_fatal (_("PC relative relocation not allowed for (internal) type %d"),
- fixP->fx_r_type);
- break;
- }
- }
+ const struct arc_operand *operand = &arc_operands[*opidx];
- pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
- fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
- ((int) fixP->fx_r_type < 0) ? "Internal":
- bfd_get_reloc_code_name (fixP->fx_r_type), value,
- fixP->fx_offset);
+ /* Only take input from real operands. */
+ if ((operand->flags & ARC_OPERAND_FAKE)
+ && !(operand->flags & ARC_OPERAND_BRAKET))
+ continue;
+ /* When we expect input, make sure we have it. */
+ if (tokidx >= ntok)
+ goto match_failed;
- /* Now check for TLS relocations. */
- reloc = fixP->fx_r_type;
- switch (reloc)
- {
- case BFD_RELOC_ARC_TLS_DTPOFF:
- case BFD_RELOC_ARC_TLS_LE_32:
- if (fixP->fx_done)
- break;
- /* Fall through. */
- case BFD_RELOC_ARC_TLS_GD_GOT:
- case BFD_RELOC_ARC_TLS_IE_GOT:
- S_SET_THREAD_LOCAL (fixP->fx_addsy);
+ /* Match operand type with expression type. */
+ switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK)
+ {
+ case ARC_OPERAND_IR:
+ /* Check to be a register. */
+ if ((tok[tokidx].X_op != O_register
+ || !is_ir_num (tok[tokidx].X_add_number))
+ && !(operand->flags & ARC_OPERAND_IGNORE))
+ goto match_failed;
+
+ /* If expect duplicate, make sure it is duplicate. */
+ if (operand->flags & ARC_OPERAND_DUPLICATE)
+ {
+ /* Check for duplicate. */
+ if (t->X_op != O_register
+ || !is_ir_num (t->X_add_number)
+ || (regno (t->X_add_number) !=
+ regno (tok[tokidx].X_add_number)))
+ goto match_failed;
+ }
+
+ /* Special handling? */
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
+ (*operand->insert)(0,
+ regno (tok[tokidx].X_add_number),
+ &errmsg);
+ if (errmsg)
+ {
+ if (operand->flags & ARC_OPERAND_IGNORE)
+ {
+ /* Missing argument, create one. */
+ if (!allocate_tok (tok, ntok - 1, tokidx))
+ goto match_failed;
+
+ tok[tokidx].X_op = O_absent;
+ ++ntok;
+ }
+ else
+ goto match_failed;
+ }
+ }
+
+ t = &tok[tokidx];
+ break;
+
+ case ARC_OPERAND_BRAKET:
+ /* Check if bracket is also in opcode table as
+ operand. */
+ if (tok[tokidx].X_op != O_bracket)
+ goto match_failed;
+ break;
+
+ case ARC_OPERAND_LIMM:
+ case ARC_OPERAND_SIGNED:
+ case ARC_OPERAND_UNSIGNED:
+ switch (tok[tokidx].X_op)
+ {
+ case O_illegal:
+ case O_absent:
+ case O_register:
+ goto match_failed;
+
+ case O_bracket:
+ /* Got an (too) early bracket, check if it is an
+ ignored operand. N.B. This procedure works only
+ when bracket is the last operand! */
+ if (!(operand->flags & ARC_OPERAND_IGNORE))
+ goto match_failed;
+ /* Insert the missing operand. */
+ if (!allocate_tok (tok, ntok - 1, tokidx))
+ goto match_failed;
+
+ tok[tokidx].X_op = O_absent;
+ ++ntok;
+ break;
+
+ case O_constant:
+ /* Check the range. */
+ if (operand->bits != 32
+ && !(operand->flags & ARC_OPERAND_NCHK))
+ {
+ offsetT min, max, val;
+ val = tok[tokidx].X_add_number;
+
+ if (operand->flags & ARC_OPERAND_SIGNED)
+ {
+ max = (1 << (operand->bits - 1)) - 1;
+ min = -(1 << (operand->bits - 1));
+ }
+ else
+ {
+ max = (1 << operand->bits) - 1;
+ min = 0;
+ }
+
+ if (val < min || val > max)
+ goto match_failed;
+
+ /* Check alignmets. */
+ if ((operand->flags & ARC_OPERAND_ALIGNED32)
+ && (val & 0x03))
+ goto match_failed;
+
+ if ((operand->flags & ARC_OPERAND_ALIGNED16)
+ && (val & 0x01))
+ goto match_failed;
+ }
+ else if (operand->flags & ARC_OPERAND_NCHK)
+ {
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
+ (*operand->insert)(0,
+ tok[tokidx].X_add_number,
+ &errmsg);
+ if (errmsg)
+ goto match_failed;
+ }
+ else
+ goto match_failed;
+ }
+ break;
+
+ case O_subtract:
+ /* Check if it is register range. */
+ if ((tok[tokidx].X_add_number == 0)
+ && contains_register (tok[tokidx].X_add_symbol)
+ && contains_register (tok[tokidx].X_op_symbol))
+ {
+ int regs;
+
+ regs = get_register (tok[tokidx].X_add_symbol);
+ regs <<= 16;
+ regs |= get_register (tok[tokidx].X_op_symbol);
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
+ (*operand->insert)(0,
+ regs,
+ &errmsg);
+ if (errmsg)
+ goto match_failed;
+ }
+ else
+ goto match_failed;
+ break;
+ }
+ default:
+ if (operand->default_reloc == 0)
+ goto match_failed; /* The operand needs relocation. */
+
+ /* Relocs requiring long immediate. FIXME! make it
+ generic and move it to a function. */
+ switch (tok[tokidx].X_md)
+ {
+ case O_gotoff:
+ case O_gotpc:
+ case O_pcl:
+ case O_tpoff:
+ case O_dtpoff:
+ case O_tlsgd:
+ case O_tlsie:
+ if (!(operand->flags & ARC_OPERAND_LIMM))
+ goto match_failed;
+ case O_absent:
+ if (!generic_reloc_p (operand->default_reloc))
+ goto match_failed;
+ default:
+ break;
+ }
+ break;
+ }
+ /* If expect duplicate, make sure it is duplicate. */
+ if (operand->flags & ARC_OPERAND_DUPLICATE)
+ {
+ if (t->X_op == O_illegal
+ || t->X_op == O_absent
+ || t->X_op == O_register
+ || (t->X_add_number != tok[tokidx].X_add_number))
+ goto match_failed;
+ }
+ t = &tok[tokidx];
+ break;
+
+ default:
+ /* Everything else should have been fake. */
+ abort ();
+ }
+
+ ++tokidx;
+ }
+ pr_debug ("opr ");
+
+ /* Check the flags. Iterate over the valid flag classes. */
+ int lnflg = nflgs;
+
+ for (flgidx = opcode->flags; *flgidx && lnflg; ++flgidx)
+ {
+ /* Get a valid flag class. */
+ const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
+ const unsigned *flgopridx;
+
+ for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
+ {
+ const struct arc_flag_operand *flg_operand;
+ struct arc_flags *pflag = first_pflag;
+ int i;
+
+ flg_operand = &arc_flag_operands[*flgopridx];
+ for (i = 0; i < nflgs; i++, pflag++)
+ {
+ /* Match against the parsed flags. */
+ if (!strcmp (flg_operand->name, pflag->name))
+ {
+ /*TODO: Check if it is duplicated. */
+ pflag->code = *flgopridx;
+ lnflg--;
+ break; /* goto next flag class and parsed flag. */
+ }
+ }
+ }
+ }
+ /* Did I check all the parsed flags? */
+ if (lnflg)
+ goto match_failed;
+
+ pr_debug ("flg");
+ /* Possible match -- did we use all of our input? */
+ if (tokidx == ntok)
+ {
+ *pntok = ntok;
+ pr_debug ("\n");
+ return opcode;
+ }
+
+ match_failed:;
+ pr_debug ("\n");
+ /* Restore the original parameters. */
+ memcpy (tok, bktok, MAX_INSN_ARGS * sizeof (*tok));
+ ntok = bkntok;
+ }
+ while (++opcode - arc_opcodes < (int) arc_num_opcodes
+ && !strcmp (opcode->name, first_opcode->name));
+
+ if (*pcpumatch)
+ *pcpumatch = got_cpu_match;
+
+ return NULL;
+}
+
+/* Swap operand tokens. */
+
+static void
+swap_operand (expressionS *operand_array,
+ unsigned source,
+ unsigned destination)
+{
+ expressionS cpy_operand;
+ expressionS *src_operand;
+ expressionS *dst_operand;
+ size_t size;
+
+ if (source == destination)
+ return;
+
+ src_operand = &operand_array[source];
+ dst_operand = &operand_array[destination];
+ size = sizeof (expressionS);
+
+ /* Make copy of operand to swap with and swap. */
+ memcpy (&cpy_operand, dst_operand, size);
+ memcpy (dst_operand, src_operand, size);
+ memcpy (src_operand, &cpy_operand, size);
+}
+
+/* Check if *op matches *tok type.
+ Returns FALSE if they don't match, TRUE if they match. */
+
+static bfd_boolean
+pseudo_operand_match (const expressionS *tok,
+ const struct arc_operand_operation *op)
+{
+ offsetT min, max, val;
+ bfd_boolean ret;
+ const struct arc_operand *operand_real = &arc_operands[op->operand_idx];
+
+ ret = FALSE;
+ switch (tok->X_op)
+ {
+ case O_constant:
+ if (operand_real->bits == 32 && (operand_real->flags & ARC_OPERAND_LIMM))
+ ret = 1;
+ else if (!(operand_real->flags & ARC_OPERAND_IR))
+ {
+ val = tok->X_add_number + op->count;
+ if (operand_real->flags & ARC_OPERAND_SIGNED)
+ {
+ max = (1 << (operand_real->bits - 1)) - 1;
+ min = -(1 << (operand_real->bits - 1));
+ }
+ else
+ {
+ max = (1 << operand_real->bits) - 1;
+ min = 0;
+ }
+ if (min <= val && val <= max)
+ ret = TRUE;
+ }
break;
- case BFD_RELOC_ARC_TLS_GD_LD:
- gas_assert (!fixP->fx_offset);
- if (fixP->fx_subsy)
- fixP->fx_offset
- = (S_GET_VALUE (fixP->fx_subsy)
- - fixP->fx_frag->fr_address- fixP->fx_where);
- fixP->fx_subsy = NULL;
- /* Fall through. */
- case BFD_RELOC_ARC_TLS_GD_CALL:
- /* These two relocs are there just to allow ld to change the tls
- model for this symbol, by patching the code. The offset -
- and scale, if any - will be installed by the linker. */
- S_SET_THREAD_LOCAL (fixP->fx_addsy);
+ case O_symbol:
+ /* Handle all symbols as long immediates or signed 9. */
+ if (operand_real->flags & ARC_OPERAND_LIMM ||
+ ((operand_real->flags & ARC_OPERAND_SIGNED) && operand_real->bits == 9))
+ ret = TRUE;
break;
- case BFD_RELOC_ARC_TLS_LE_S9:
- case BFD_RELOC_ARC_TLS_DTPOFF_S9:
- as_bad (_("TLS_*_S9 relocs are not supported yet"));
+ case O_register:
+ if (operand_real->flags & ARC_OPERAND_IR)
+ ret = TRUE;
+ break;
+
+ case O_bracket:
+ if (operand_real->flags & ARC_OPERAND_BRAKET)
+ ret = TRUE;
break;
default:
+ /* Unknown. */
break;
}
+ return ret;
+}
- if (!fixP->fx_done)
+/* Find pseudo instruction in array. */
+
+static const struct arc_pseudo_insn *
+find_pseudo_insn (const char *opname,
+ int ntok,
+ const expressionS *tok)
+{
+ const struct arc_pseudo_insn *pseudo_insn = NULL;
+ const struct arc_operand_operation *op;
+ unsigned int i;
+ int j;
+
+ for (i = 0; i < arc_num_pseudo_insn; ++i)
{
- return;
+ pseudo_insn = &arc_pseudo_insns[i];
+ if (strcmp (pseudo_insn->mnemonic_p, opname) == 0)
+ {
+ op = pseudo_insn->operand;
+ for (j = 0; j < ntok; ++j)
+ if (!pseudo_operand_match (&tok[j], &op[j]))
+ break;
+
+ /* Found the right instruction. */
+ if (j == ntok)
+ return pseudo_insn;
+ }
}
+ return NULL;
+}
- /* Addjust the value if we have a constant. */
- value += fx_offset;
+/* Assumes the expressionS *tok is of sufficient size. */
- /* For hosts with longs bigger than 32-bits make sure that the top
- bits of a 32-bit negative value read in by the parser are set,
- so that the correct comparisons are made. */
- if (value & 0x80000000)
- value |= (-1L << 31);
+static const struct arc_opcode *
+find_special_case_pseudo (const char *opname,
+ int *ntok,
+ expressionS *tok,
+ int *nflgs,
+ struct arc_flags *pflags)
+{
+ const struct arc_pseudo_insn *pseudo_insn = NULL;
+ const struct arc_operand_operation *operand_pseudo;
+ const struct arc_operand *operand_real;
+ unsigned i;
+ char construct_operand[MAX_CONSTR_STR];
- reloc = fixP->fx_r_type;
- switch (reloc)
+ /* Find whether opname is in pseudo instruction array. */
+ pseudo_insn = find_pseudo_insn (opname, *ntok, tok);
+
+ if (pseudo_insn == NULL)
+ return NULL;
+
+ /* Handle flag, Limited to one flag at the moment. */
+ if (pseudo_insn->flag_r != NULL)
+ *nflgs += tokenize_flags (pseudo_insn->flag_r, &pflags[*nflgs],
+ MAX_INSN_FLGS - *nflgs);
+
+ /* Handle operand operations. */
+ for (i = 0; i < pseudo_insn->operand_cnt; ++i)
{
- case BFD_RELOC_8:
- case BFD_RELOC_16:
- case BFD_RELOC_24:
- case BFD_RELOC_32:
- case BFD_RELOC_64:
- case BFD_RELOC_ARC_32_PCREL:
- md_number_to_chars (fixpos, value, fixP->fx_size);
- return;
+ operand_pseudo = &pseudo_insn->operand[i];
+ operand_real = &arc_operands[operand_pseudo->operand_idx];
- case BFD_RELOC_ARC_GOTPC32:
- /* I cannot fix an GOTPC relocation because I need to relax it
- from ld rx,[pcl,@sym@gotpc] to add rx,pcl,@sym@gotpc. */
- as_bad (_("Unsupported operation on reloc"));
- return;
+ if (operand_real->flags & ARC_OPERAND_BRAKET &&
+ !operand_pseudo->needs_insert)
+ continue;
- case BFD_RELOC_ARC_TLS_DTPOFF:
- case BFD_RELOC_ARC_TLS_LE_32:
- gas_assert (!fixP->fx_addsy);
- gas_assert (!fixP->fx_subsy);
+ /* Has to be inserted (i.e. this token does not exist yet). */
+ if (operand_pseudo->needs_insert)
+ {
+ if (operand_real->flags & ARC_OPERAND_BRAKET)
+ {
+ tok[i].X_op = O_bracket;
+ ++(*ntok);
+ continue;
+ }
- case BFD_RELOC_ARC_GOTOFF:
- case BFD_RELOC_ARC_32_ME:
- case BFD_RELOC_ARC_PC32:
- md_number_to_chars_midend (fixpos, value, fixP->fx_size);
- return;
+ /* Check if operand is a register or constant and handle it
+ by type. */
+ if (operand_real->flags & ARC_OPERAND_IR)
+ snprintf (construct_operand, MAX_CONSTR_STR, "r%d",
+ operand_pseudo->count);
+ else
+ snprintf (construct_operand, MAX_CONSTR_STR, "%d",
+ operand_pseudo->count);
- case BFD_RELOC_ARC_PLT32:
- md_number_to_chars_midend (fixpos, value, fixP->fx_size);
- return;
+ tokenize_arguments (construct_operand, &tok[i], 1);
+ ++(*ntok);
+ }
+
+ else if (operand_pseudo->count)
+ {
+ /* Operand number has to be adjusted accordingly (by operand
+ type). */
+ switch (tok[i].X_op)
+ {
+ case O_constant:
+ tok[i].X_add_number += operand_pseudo->count;
+ break;
+
+ case O_symbol:
+ break;
+
+ default:
+ /* Ignored. */
+ break;
+ }
+ }
+ }
+
+ /* Swap operands if necessary. Only supports one swap at the
+ moment. */
+ for (i = 0; i < pseudo_insn->operand_cnt; ++i)
+ {
+ operand_pseudo = &pseudo_insn->operand[i];
+
+ if (operand_pseudo->swap_operand_idx == i)
+ continue;
+
+ swap_operand (tok, i, operand_pseudo->swap_operand_idx);
+
+ /* Prevent a swap back later by breaking out. */
+ break;
+ }
+
+ return (const struct arc_opcode *)
+ hash_find (arc_opcode_hash, pseudo_insn->mnemonic_r);
+}
+
+static const struct arc_opcode *
+find_special_case_flag (const char *opname,
+ int *nflgs,
+ struct arc_flags *pflags)
+{
+ unsigned int i;
+ const char *flagnm;
+ unsigned flag_idx, flag_arr_idx;
+ size_t flaglen, oplen;
+ const struct arc_flag_special *arc_flag_special_opcode;
+ const struct arc_opcode *opcode;
+
+ /* Search for special case instruction. */
+ for (i = 0; i < arc_num_flag_special; i++)
+ {
+ arc_flag_special_opcode = &arc_flag_special_cases[i];
+ oplen = strlen (arc_flag_special_opcode->name);
+
+ if (strncmp (opname, arc_flag_special_opcode->name, oplen) != 0)
+ continue;
+
+ /* Found a potential special case instruction, now test for
+ flags. */
+ for (flag_arr_idx = 0;; ++flag_arr_idx)
+ {
+ flag_idx = arc_flag_special_opcode->flags[flag_arr_idx];
+ if (flag_idx == 0)
+ break; /* End of array, nothing found. */
- case BFD_RELOC_ARC_S25H_PCREL_PLT:
- reloc = BFD_RELOC_ARC_S25W_PCREL;
- goto solve_plt;
+ flagnm = arc_flag_operands[flag_idx].name;
+ flaglen = strlen (flagnm);
+ if (strcmp (opname + oplen, flagnm) == 0)
+ {
+ opcode = (const struct arc_opcode *)
+ hash_find (arc_opcode_hash,
+ arc_flag_special_opcode->name);
- case BFD_RELOC_ARC_S21H_PCREL_PLT:
- reloc = BFD_RELOC_ARC_S21H_PCREL;
- goto solve_plt;
+ if (*nflgs + 1 > MAX_INSN_FLGS)
+ break;
+ memcpy (pflags[*nflgs].name, flagnm, flaglen);
+ pflags[*nflgs].name[flaglen] = '\0';
+ (*nflgs)++;
+ return opcode;
+ }
+ }
+ }
+ return NULL;
+}
- case BFD_RELOC_ARC_S25W_PCREL_PLT:
- reloc = BFD_RELOC_ARC_S25W_PCREL;
- goto solve_plt;
+/* Used to find special case opcode. */
- case BFD_RELOC_ARC_S21W_PCREL_PLT:
- reloc = BFD_RELOC_ARC_S21W_PCREL;
+static const struct arc_opcode *
+find_special_case (const char *opname,
+ int *nflgs,
+ struct arc_flags *pflags,
+ expressionS *tok,
+ int *ntok)
+{
+ const struct arc_opcode *opcode;
- case BFD_RELOC_ARC_S25W_PCREL:
- case BFD_RELOC_ARC_S21W_PCREL:
- case BFD_RELOC_ARC_S21H_PCREL:
- case BFD_RELOC_ARC_S25H_PCREL:
- case BFD_RELOC_ARC_S13_PCREL:
- solve_plt:
- operand = find_operand_for_reloc (reloc);
- gas_assert (operand);
- break;
+ opcode = find_special_case_pseudo (opname, ntok, tok, nflgs, pflags);
- default:
- {
- if ((int) fixP->fx_r_type >= 0)
- as_fatal (_("unhandled relocation type %s"),
- bfd_get_reloc_code_name (fixP->fx_r_type));
+ if (opcode == NULL)
+ opcode = find_special_case_flag (opname, nflgs, pflags);
- /* The rest of these fixups needs to be completely resolved as
- constants. */
- if (fixP->fx_addsy != 0
- && S_GET_SEGMENT (fixP->fx_addsy) != absolute_section)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("non-absolute expression in constant field"));
+ return opcode;
+}
- gas_assert (-(int) fixP->fx_r_type < (int) arc_num_operands);
- operand = &arc_operands[-(int) fixP->fx_r_type];
- break;
- }
- }
+static void
+preprocess_operands (const struct arc_opcode *opcode,
+ expressionS *tok,
+ int ntok)
+{
+ int i;
+ size_t len;
+ const char *p;
+ unsigned j;
+ const struct arc_aux_reg *auxr;
- if (target_big_endian)
+ for (i = 0; i < ntok; i++)
{
- switch (fixP->fx_size)
+ switch (tok[i].X_op)
{
- case 4:
- insn = bfd_getb32 (fixpos);
- break;
- case 2:
- insn = bfd_getb16 (fixpos);
+ case O_illegal:
+ case O_absent:
+ break; /* Throw and error. */
+
+ case O_symbol:
+ if (opcode->class != AUXREG)
+ break;
+ /* Convert the symbol to a constant if possible. */
+ p = S_GET_NAME (tok[i].X_add_symbol);
+ len = strlen (p);
+
+ auxr = &arc_aux_regs[0];
+ for (j = 0; j < arc_num_aux_regs; j++, auxr++)
+ if (len == auxr->length
+ && strcasecmp (auxr->name, p) == 0)
+ {
+ tok[i].X_op = O_constant;
+ tok[i].X_add_number = auxr->address;
+ break;
+ }
break;
default:
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("unknown fixup size"));
- }
- }
- else
- {
- insn = 0;
- switch (fixP->fx_size)
- {
- case 4:
- insn = bfd_getl16 (fixpos) << 16 | bfd_getl16 (fixpos + 2);
- break;
- case 2:
- insn = bfd_getl16 (fixpos);
break;
- default:
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("unknown fixup size"));
}
}
-
- insn = insert_operand (insn, operand, (offsetT) value,
- fixP->fx_file, fixP->fx_line);
-
- md_number_to_chars_midend (fixpos, insn, fixP->fx_size);
}
-/* Prepare machine-dependent frags for relaxation.
+/* Given an opcode name, pre-tockenized set of argumenst and the
+ opcode flags, take it all the way through emission. */
- Called just before relaxation starts. Any symbol that is now undefined
- will not become defined.
+static void
+assemble_tokens (const char *opname,
+ expressionS *tok,
+ int ntok,
+ struct arc_flags *pflags,
+ int nflgs)
+{
+ bfd_boolean found_something = FALSE;
+ const struct arc_opcode *opcode;
+ int cpumatch = 1;
- Return the correct fr_subtype in the frag.
+ /* Search opcodes. */
+ opcode = (const struct arc_opcode *) hash_find (arc_opcode_hash, opname);
- Return the initial "guess for fr_var" to caller. The guess for fr_var
- is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix
- or fr_var contributes to our returned value.
+ /* Couldn't find opcode conventional way, try special cases. */
+ if (!opcode)
+ opcode = find_special_case (opname, &nflgs, pflags, tok, &ntok);
- Although it may not be explicit in the frag, pretend
- fr_var starts with a value. */
+ if (opcode)
+ {
+ pr_debug ("%s:%d: assemble_tokens: %s trying opcode 0x%08X\n",
+ frag_now->fr_file, frag_now->fr_line, opcode->name,
+ opcode->opcode);
-int
-md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
- segT segment ATTRIBUTE_UNUSED)
-{
- int growth = 4;
+ preprocess_operands (opcode, tok, ntok);
- fragP->fr_var = 4;
- pr_debug ("%s:%d: md_estimate_size_before_relax: %d\n",
- fragP->fr_file, fragP->fr_line, growth);
+ found_something = TRUE;
+ opcode = find_opcode_match (opcode, tok, &ntok, pflags, nflgs, &cpumatch);
+ if (opcode)
+ {
+ struct arc_insn insn;
+ assemble_insn (opcode, tok, ntok, pflags, nflgs, &insn);
+ emit_insn (&insn);
+ return;
+ }
+ }
- as_fatal (_("md_estimate_size_before_relax\n"));
- return growth;
+ if (found_something)
+ {
+ if (cpumatch)
+ as_bad (_("inappropriate arguments for opcode '%s'"), opname);
+ else
+ as_bad (_("opcode '%s' not supported for target %s"), opname,
+ arc_target_name);
+ }
+ else
+ as_bad (_("unknown opcode '%s'"), opname);
}
-/* Translate internal representation of relocation info to BFD target
- format. */
+/* The public interface to the instruction assembler. */
-arelent *
-tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
- fixS *fixP)
+void
+md_assemble (char *str)
{
- arelent *reloc;
- bfd_reloc_code_real_type code;
+ char *opname;
+ expressionS tok[MAX_INSN_ARGS];
+ int ntok, nflg;
+ size_t opnamelen;
+ struct arc_flags flags[MAX_INSN_FLGS];
- reloc = (arelent *) xmalloc (sizeof (* reloc));
- reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
- *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
- reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
+ /* Split off the opcode. */
+ opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_0123468");
+ opname = xmalloc (opnamelen + 1);
+ memcpy (opname, str, opnamelen);
+ opname[opnamelen] = '\0';
- /* Make sure none of our internal relocations make it this far.
- They'd better have been fully resolved by this point. */
- gas_assert ((int) fixP->fx_r_type > 0);
+ /* Signalize we are assmbling the instructions. */
+ assembling_insn = TRUE;
- code = fixP->fx_r_type;
+ /* Tokenize the flags. */
+ if ((nflg = tokenize_flags (str + opnamelen, flags, MAX_INSN_FLGS)) == -1)
+ {
+ as_bad (_("syntax error"));
+ return;
+ }
- /* if we have something like add gp, pcl,
- _GLOBAL_OFFSET_TABLE_@gotpc. */
- if (code == BFD_RELOC_ARC_GOTPC32
- && GOT_symbol
- && fixP->fx_addsy == GOT_symbol)
- code = BFD_RELOC_ARC_GOTPC;
+ /* Scan up to the end of the mnemonic which must end in space or end
+ of string. */
+ str += opnamelen;
+ for (; *str != '\0'; str++)
+ if (*str == ' ')
+ break;
- reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
- if (reloc->howto == NULL)
+ /* Tokenize the rest of the line. */
+ if ((ntok = tokenize_arguments (str, tok, MAX_INSN_ARGS)) < 0)
{
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("cannot represent `%s' relocation in object file"),
- bfd_get_reloc_code_name (code));
- return NULL;
+ as_bad (_("syntax error"));
+ return;
}
- if (!fixP->fx_pcrel != !reloc->howto->pc_relative)
- as_fatal (_("internal error? cannot generate `%s' relocation"),
- bfd_get_reloc_code_name (code));
+ /* Finish it off. */
+ assemble_tokens (opname, tok, ntok, flags, nflg);
+ assembling_insn = FALSE;
+}
+
+/* Callback to insert a register into the hash table. */
+
+static void
+declare_register (char *name, int number)
+{
+ const char *err;
+ symbolS *regS = symbol_create (name, reg_section,
+ number, &zero_address_frag);
+
+ err = hash_insert (arc_reg_hash, S_GET_NAME (regS), (void *) regS);
+ if (err)
+ as_fatal ("Inserting \"%s\" into register table failed: %s",
+ name, err);
+}
- gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
+/* Construct symbols for each of the general registers. */
- if (code == BFD_RELOC_ARC_TLS_DTPOFF
- || code == BFD_RELOC_ARC_TLS_DTPOFF_S9)
+static void
+declare_register_set (void)
+{
+ int i;
+ for (i = 0; i < 64; ++i)
{
- asymbol *sym
- = fixP->fx_subsy ? symbol_get_bfdsym (fixP->fx_subsy) : NULL;
- /* We just want to store a 24 bit index, but we have to wait
- till after write_contents has been called via
- bfd_map_over_sections before we can get the index from
- _bfd_elf_symbol_from_bfd_symbol. Thus, the write_relocs
- function is elf32-arc.c has to pick up the slack.
- Unfortunately, this leads to problems with hosts that have
- pointers wider than long (bfd_vma). There would be various
- ways to handle this, all error-prone :-( */
- reloc->addend = (bfd_vma) sym;
- if ((asymbol *) reloc->addend != sym)
+ char name[7];
+
+ sprintf (name, "r%d", i);
+ declare_register (name, i);
+ if ((i & 0x01) == 0)
{
- as_bad ("Can't store pointer\n");
- return NULL;
+ sprintf (name, "r%dr%d", i, i+1);
+ declare_register (name, i);
}
}
- else
- reloc->addend = fixP->fx_offset;
-
- return reloc;
}
-/* Perform post-processing of machine-dependent frags after relaxation.
- Called after relaxation is finished.
- In: Address of frag.
- fr_type == rs_machine_dependent.
- fr_subtype is what the address relaxed to.
-
- Out: Any fixS:s and constants are set up. */
+/* Port-specific assembler initialization. This function is called
+ once, at assembler startup time. */
void
-md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
- segT segment ATTRIBUTE_UNUSED,
- fragS *fragP ATTRIBUTE_UNUSED)
+md_begin (void)
{
- pr_debug ("%s:%d: md_convert_frag, subtype: %d, fix: %d, var: %d\n",
- fragP->fr_file, fragP->fr_line,
- fragP->fr_subtype, fragP->fr_fix, fragP->fr_var);
- abort ();
-}
+ unsigned int i;
-/* We have no need to default values of symbols. We could catch
- register names here, but that is handled by inserting them all in
- the symbol table to begin with. */
+ /* The endianness can be chosen "at the factory". */
+ target_big_endian = byte_order == BIG_ENDIAN;
-symbolS *
-md_undefined_symbol (char *name)
-{
- /* The arc abi demands that a GOT[0] should be referencible as
- [pc+_DYNAMIC@gotpc]. Hence we convert a _DYNAMIC@gotpc to a
- GOTPC reference to _GLOBAL_OFFSET_TABLE_. */
- if (((*name == '_')
- && (*(name+1) == 'G')
- && (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0))
- || ((*name == '_')
- && (*(name+1) == 'D')
- && (strcmp (name, DYNAMIC_STRUCT_NAME) == 0)))
+ if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type))
+ as_warn (_("could not set architecture and machine"));
+
+ /* Set elf header flags. */
+ bfd_set_private_flags (stdoutput, arc_eflag);
+
+ /* Set up a hash table for the instructions. */
+ arc_opcode_hash = hash_new ();
+ if (arc_opcode_hash == NULL)
+ as_fatal (_("Virtual memory exhausted"));
+
+ /* Initialize the hash table with the insns. */
+ for (i = 0; i < arc_num_opcodes;)
{
- if (!GOT_symbol)
- {
- if (symbol_find (name))
- as_bad ("GOT already in symbol table");
+ const char *name, *retval;
- GOT_symbol = symbol_new (GLOBAL_OFFSET_TABLE_NAME, undefined_section,
- (valueT) 0, &zero_address_frag);
- };
- return GOT_symbol;
+ name = arc_opcodes[i].name;
+ retval = hash_insert (arc_opcode_hash, name, (void *) &arc_opcodes[i]);
+ if (retval)
+ as_fatal (_("internal error: can't hash opcode '%s': %s"),
+ name, retval);
+
+ while (++i < arc_num_opcodes
+ && (arc_opcodes[i].name == name
+ || !strcmp (arc_opcodes[i].name, name)))
+ continue;
}
- return NULL;
+
+ /* Register declaration. */
+ arc_reg_hash = hash_new ();
+ if (arc_reg_hash == NULL)
+ as_fatal (_("Virtual memory exhausted"));
+
+ declare_register_set ();
+ declare_register ("gp", 26);
+ declare_register ("fp", 27);
+ declare_register ("sp", 28);
+ declare_register ("ilink", 29);
+ declare_register ("ilink1", 29);
+ declare_register ("ilink2", 30);
+ declare_register ("blink", 31);
+
+ declare_register ("mlo", 57);
+ declare_register ("mmid", 58);
+ declare_register ("mhi", 59);
+
+ declare_register ("acc1", 56);
+ declare_register ("acc2", 57);
+
+ declare_register ("lp_count", 60);
+ declare_register ("pcl", 63);
+
+ /* Initialize the last instructions. */
+ memset (&arc_last_insns[0], 0, sizeof (arc_last_insns));
}
-/* Turn a string in input_line_pointer into a floating point constant
- of type type, and store the appropriate bytes in *litP. The number
- of LITTLENUMS emitted is stored in *sizeP. An error message is
- returned, or NULL on OK. */
+/* Write a value out to the object file, using the appropriate
+ endianness. */
-char *
-md_atof (int type, char *litP, int *sizeP)
+void
+md_number_to_chars (char *buf,
+ valueT val,
+ int n)
{
- return ieee_md_atof (type, litP, sizeP, target_big_endian);
+ if (target_big_endian)
+ number_to_chars_bigendian (buf, val, n);
+ else
+ number_to_chars_littleendian (buf, val, n);
}
-/* Called for any expression that can not be recognized. When the
- function is called, `input_line_pointer' will point to the start of
- the expression. */
+/* Round up a section size to the appropriate boundary. */
-void
-md_operand (expressionS *expressionP ATTRIBUTE_UNUSED)
+valueT
+md_section_align (segT segment,
+ valueT size)
{
- char *p = input_line_pointer;
- if (*p == '@')
- {
- input_line_pointer++;
- expressionP->X_op = O_symbol;
- expression (expressionP);
- }
+ int align = bfd_get_section_alignment (stdoutput, segment);
+
+ return ((size + (1 << align) - 1) & (-((valueT) 1 << align)));
}
-/* This function is called from the function 'expression', it attempts
- to parse special names (in our case register names). It fills in
- the expression with the identified register. It returns TRUE if
- it is a register and FALSE otherwise. */
+/* The location from which a PC relative jump should be calculated,
+ given a PC relative reloc. */
-bfd_boolean
-arc_parse_name (const char *name,
- struct expressionS *e)
+long
+md_pcrel_from_section (fixS *fixP,
+ segT sec)
{
- struct symbol *sym;
+ offsetT base = fixP->fx_where + fixP->fx_frag->fr_address;
- if (!assembling_insn)
- return FALSE;
+ pr_debug ("pcrel_from_section, fx_offset = %d\n", (int) fixP->fx_offset);
- /* Handle only registers. */
- if (e->X_op != O_absent)
- return FALSE;
+ if (fixP->fx_addsy != (symbolS *) NULL
+ && (!S_IS_DEFINED (fixP->fx_addsy)
+ || S_GET_SEGMENT (fixP->fx_addsy) != sec))
+ {
+ pr_debug ("Unknown pcrel symbol: %s\n", S_GET_NAME (fixP->fx_addsy));
- sym = hash_find (arc_reg_hash, name);
- if (sym)
+ /* The symbol is undefined (or is defined but not in this section).
+ Let the linker figure it out. */
+ return 0;
+ }
+
+ if ((int) fixP->fx_r_type < 0)
{
- e->X_op = O_register;
- e->X_add_number = S_GET_VALUE (sym);
- return TRUE;
+ /* These are the "internal" relocations. Align them to
+ 32 bit boundary (PCL), for the moment. */
+ base &= ~3;
}
- return FALSE;
+ else
+ {
+ switch (fixP->fx_r_type)
+ {
+ case BFD_RELOC_ARC_PC32:
+ /* The hardware calculates relative to the start of the
+ insn, but this relocation is relative to location of the
+ LIMM, compensate. The base always needs to be
+ substracted by 4 as we do not support this type of PCrel
+ relocation for short instructions. */
+ base -= 4;
+ /* Fall through. */
+ case BFD_RELOC_ARC_PLT32:
+ case BFD_RELOC_ARC_S25H_PCREL_PLT:
+ case BFD_RELOC_ARC_S21H_PCREL_PLT:
+ case BFD_RELOC_ARC_S25W_PCREL_PLT:
+ case BFD_RELOC_ARC_S21W_PCREL_PLT:
+
+ case BFD_RELOC_ARC_S21H_PCREL:
+ case BFD_RELOC_ARC_S25H_PCREL:
+ case BFD_RELOC_ARC_S13_PCREL:
+ case BFD_RELOC_ARC_S21W_PCREL:
+ case BFD_RELOC_ARC_S25W_PCREL:
+ base &= ~3;
+ break;
+ default:
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("unhandled reloc %s in md_pcrel_from_section"),
+ bfd_get_reloc_code_name (fixP->fx_r_type));
+ break;
+ }
+ }
+
+ pr_debug ("pcrel from %x + %lx = %x, symbol: %s (%x)\n",
+ fixP->fx_frag->fr_address, fixP->fx_where, base,
+ fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "(null)",
+ fixP->fx_addsy ? S_GET_VALUE (fixP->fx_addsy) : 0);
+
+ return base;
}
-/* md_parse_option
- Invocation line includes a switch not recognized by the base assembler.
- See if it's a processor-specific option.
+/* Given a BFD relocation find the coresponding operand. */
- New options (supported) are:
+static const struct arc_operand *
+find_operand_for_reloc (extended_bfd_reloc_code_real_type reloc)
+{
+ unsigned i;
- -mcpu=<cpu name> Assemble for selected processor
- -EB/-mbig-endian Big-endian
- -EL/-mlittle-endian Little-endian
+ for (i = 0; i < arc_num_operands; i++)
+ if (arc_operands[i].default_reloc == reloc)
+ return &arc_operands[i];
+ return NULL;
+}
- The following CPU names are recognized:
- arc700, av2em, av2hs. */
+/* Insert an operand value into an instruction. */
-int
-md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
+static unsigned
+insert_operand (unsigned insn,
+ const struct arc_operand *operand,
+ offsetT val,
+ char *file,
+ unsigned line)
{
- int cpu_flags = EF_ARC_CPU_GENERIC;
+ offsetT min = 0, max = 0;
- switch (c)
+ if (operand->bits != 32
+ && !(operand->flags & ARC_OPERAND_NCHK)
+ && !(operand->flags & ARC_OPERAND_FAKE))
{
- case OPTION_ARC600:
- case OPTION_ARC601:
- return md_parse_option (OPTION_MCPU, "arc600");
+ if (operand->flags & ARC_OPERAND_SIGNED)
+ {
+ max = (1 << (operand->bits - 1)) - 1;
+ min = -(1 << (operand->bits - 1));
+ }
+ else
+ {
+ max = (1 << operand->bits) - 1;
+ min = 0;
+ }
- case OPTION_ARC700:
- return md_parse_option (OPTION_MCPU, "arc700");
+ if (val < min || val > max)
+ as_bad_value_out_of_range (_("operand"),
+ val, min, max, file, line);
+ }
- case OPTION_ARCEM:
- return md_parse_option (OPTION_MCPU, "arcem");
+ pr_debug ("insert field: %ld <= %ld <= %ld in 0x%08x\n",
+ min, val, max, insn);
- case OPTION_ARCHS:
- return md_parse_option (OPTION_MCPU, "archs");
+ if ((operand->flags & ARC_OPERAND_ALIGNED32)
+ && (val & 0x03))
+ as_bad_where (file, line,
+ _("Unaligned operand. Needs to be 32bit aligned"));
- case OPTION_MCPU:
- {
- int i;
- char *s = alloca (strlen (arg) + 1);
+ if ((operand->flags & ARC_OPERAND_ALIGNED16)
+ && (val & 0x01))
+ as_bad_where (file, line,
+ _("Unaligned operand. Needs to be 16bit aligned"));
- {
- char *t = s;
- char *arg1 = arg;
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
- do
- *t = TOLOWER (*arg1++);
- while (*t++);
+ insn = (*operand->insert) (insn, val, &errmsg);
+ if (errmsg)
+ as_warn_where (file, line, "%s", errmsg);
+ }
+ else
+ {
+ if (operand->flags & ARC_OPERAND_TRUNCATE)
+ {
+ if (operand->flags & ARC_OPERAND_ALIGNED32)
+ val >>= 2;
+ if (operand->flags & ARC_OPERAND_ALIGNED16)
+ val >>= 1;
}
+ insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift);
+ }
+ return insn;
+}
- for (i = 0; cpu_types[i].name; ++i)
- {
- if (!strcmp (cpu_types[i].name, s))
- {
- arc_target = cpu_types[i].flags;
- arc_target_name = cpu_types[i].name;
- arc_features = cpu_types[i].features;
- arc_mach_type = cpu_types[i].mach;
- cpu_flags = cpu_types[i].eflags;
-
- mach_type_specified_p = 1;
- break;
- }
- }
-
- if (!cpu_types[i].name)
- {
- as_fatal (_("unknown architecture: %s\n"), arg);
- }
- break;
- }
-
- case OPTION_EB:
- arc_target_format = "elf32-bigarc";
- byte_order = BIG_ENDIAN;
- break;
+/* Apply a fixup to the object code. At this point all symbol values
+ should be fully resolved, and we attempt to completely resolve the
+ reloc. If we can not do that, we determine the correct reloc code
+ and put it back in the fixup. To indicate that a fixup has been
+ eliminated, set fixP->fx_done. */
- case OPTION_EL:
- arc_target_format = "elf32-littlearc";
- byte_order = LITTLE_ENDIAN;
- break;
+void
+md_apply_fix (fixS *fixP,
+ valueT *valP,
+ segT seg)
+{
+ char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
+ valueT value = *valP;
+ unsigned insn = 0;
+ symbolS *fx_addsy, *fx_subsy;
+ offsetT fx_offset;
+ segT add_symbol_segment = absolute_section;
+ segT sub_symbol_segment = absolute_section;
+ const struct arc_operand *operand = NULL;
+ extended_bfd_reloc_code_real_type reloc;
- case OPTION_CD:
- /* This option has an effect only on ARC EM. */
- if (arc_target & ARC_OPCODE_ARCv2EM)
- arc_features |= ARC_CD;
- break;
+ pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
+ fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
+ ((int) fixP->fx_r_type < 0) ? "Internal":
+ bfd_get_reloc_code_name (fixP->fx_r_type), value,
+ fixP->fx_offset);
- case OPTION_USER_MODE:
- case OPTION_LD_EXT_MASK:
- case OPTION_SWAP:
- case OPTION_NORM:
- case OPTION_BARREL_SHIFT:
- case OPTION_MIN_MAX:
- case OPTION_NO_MPY:
- case OPTION_EA:
- case OPTION_MUL64:
- case OPTION_SIMD:
- case OPTION_SPFP:
- case OPTION_DPFP:
- case OPTION_XMAC_D16:
- case OPTION_XMAC_24:
- case OPTION_DSP_PACKA:
- case OPTION_CRC:
- case OPTION_DVBF:
- case OPTION_TELEPHONY:
- case OPTION_XYMEMORY:
- case OPTION_LOCK:
- case OPTION_SWAPE:
- case OPTION_RTSC:
- case OPTION_FPUDA:
- /* Dummy options are accepted but have no effect. */
- break;
+ fx_addsy = fixP->fx_addsy;
+ fx_subsy = fixP->fx_subsy;
+ fx_offset = 0;
- default:
- return 0;
+ if (fx_addsy)
+ {
+ add_symbol_segment = S_GET_SEGMENT (fx_addsy);
}
- if (cpu_flags != EF_ARC_CPU_GENERIC)
- arc_eflag = (arc_eflag & ~EF_ARC_MACH_MSK) | cpu_flags;
-
- return 1;
-}
-
-void
-md_show_usage (FILE *stream)
-{
- fprintf (stream, _("ARC-specific assembler options:\n"));
+ if (fx_subsy
+ && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF
+ && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF_S9
+ && fixP->fx_r_type != BFD_RELOC_ARC_TLS_GD_LD)
+ {
+ resolve_symbol_value (fx_subsy);
+ sub_symbol_segment = S_GET_SEGMENT (fx_subsy);
- fprintf (stream, " -mcpu=<cpu name>\t assemble for CPU <cpu name>\n");
- fprintf (stream,
- " -mcode-density\t enable code density option for ARC EM\n");
+ if (sub_symbol_segment == absolute_section)
+ {
+ /* The symbol is really a constant. */
+ fx_offset -= S_GET_VALUE (fx_subsy);
+ fx_subsy = NULL;
+ }
+ else
+ {
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("can't resolve `%s' {%s section} - `%s' {%s section}"),
+ fx_addsy ? S_GET_NAME (fx_addsy) : "0",
+ segment_name (add_symbol_segment),
+ S_GET_NAME (fx_subsy),
+ segment_name (sub_symbol_segment));
+ return;
+ }
+ }
- fprintf (stream, _("\
- -EB assemble code for a big-endian cpu\n"));
- fprintf (stream, _("\
- -EL assemble code for a little-endian cpu\n"));
-}
+ if (fx_addsy
+ && !S_IS_WEAK (fx_addsy))
+ {
+ if (add_symbol_segment == seg
+ && fixP->fx_pcrel)
+ {
+ value += S_GET_VALUE (fx_addsy);
+ value -= md_pcrel_from_section (fixP, seg);
+ fx_addsy = NULL;
+ fixP->fx_pcrel = FALSE;
+ }
+ else if (add_symbol_segment == absolute_section)
+ {
+ value = fixP->fx_offset;
+ fx_offset += S_GET_VALUE (fixP->fx_addsy);
+ fx_addsy = NULL;
+ fixP->fx_pcrel = FALSE;
+ }
+ }
-static void
-preprocess_operands (const struct arc_opcode *opcode,
- expressionS *tok,
- int ntok)
-{
- int i;
- size_t len;
- const char *p;
- unsigned j;
- const struct arc_aux_reg *auxr;
+ if (!fx_addsy)
+ fixP->fx_done = TRUE;
- for (i = 0; i < ntok; i++)
+ if (fixP->fx_pcrel)
{
- switch (tok[i].X_op)
- {
- case O_illegal:
- case O_absent:
- break; /* Throw and error. */
-
- case O_symbol:
- if (opcode->class != AUXREG)
- break;
- /* Convert the symbol to a constant if possible. */
- p = S_GET_NAME (tok[i].X_add_symbol);
- len = strlen (p);
+ if (fx_addsy
+ && ((S_IS_DEFINED (fx_addsy)
+ && S_GET_SEGMENT (fx_addsy) != seg)
+ || S_IS_WEAK (fx_addsy)))
+ value += md_pcrel_from_section (fixP, seg);
- auxr = &arc_aux_regs[0];
- for (j = 0; j < arc_num_aux_regs; j++, auxr++)
- if (len == auxr->length
- && strcasecmp (auxr->name, p) == 0)
- {
- tok[i].X_op = O_constant;
- tok[i].X_add_number = auxr->address;
- break;
- }
+ switch (fixP->fx_r_type)
+ {
+ case BFD_RELOC_ARC_32_ME:
+ /* This is a pc-relative value in a LIMM. Adjust it to the
+ address of the instruction not to the address of the
+ LIMM. Note: it is not anylonger valid this afirmation as
+ the linker consider ARC_PC32 a fixup to entire 64 bit
+ insn. */
+ fixP->fx_offset += fixP->fx_frag->fr_address;
+ /* Fall through. */
+ case BFD_RELOC_32:
+ fixP->fx_r_type = BFD_RELOC_ARC_PC32;
+ /* Fall through. */
+ case BFD_RELOC_ARC_PC32:
+ /* fixP->fx_offset += fixP->fx_where - fixP->fx_dot_value; */
break;
default:
+ if ((int) fixP->fx_r_type < 0)
+ as_fatal (_("PC relative relocation not allowed for (internal) type %d"),
+ fixP->fx_r_type);
break;
}
}
-}
-/* Given an opcode name, pre-tockenized set of argumenst and the
- opcode flags, take it all the way through emission. */
-
-static void
-assemble_tokens (const char *opname,
- expressionS *tok,
- int ntok,
- struct arc_flags *pflags,
- int nflgs)
-{
- bfd_boolean found_something = FALSE;
- const struct arc_opcode *opcode;
- int cpumatch = 1;
-
- /* Search opcodes. */
- opcode = (const struct arc_opcode *) hash_find (arc_opcode_hash, opname);
+ pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
+ fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
+ ((int) fixP->fx_r_type < 0) ? "Internal":
+ bfd_get_reloc_code_name (fixP->fx_r_type), value,
+ fixP->fx_offset);
- /* Couldn't find opcode conventional way, try special cases. */
- if (!opcode)
- opcode = find_special_case (opname, &nflgs, pflags, tok, &ntok);
- if (opcode)
+ /* Now check for TLS relocations. */
+ reloc = fixP->fx_r_type;
+ switch (reloc)
{
- pr_debug ("%s:%d: assemble_tokens: %s trying opcode 0x%08X\n",
- frag_now->fr_file, frag_now->fr_line, opcode->name,
- opcode->opcode);
+ case BFD_RELOC_ARC_TLS_DTPOFF:
+ case BFD_RELOC_ARC_TLS_LE_32:
+ if (fixP->fx_done)
+ break;
+ /* Fall through. */
+ case BFD_RELOC_ARC_TLS_GD_GOT:
+ case BFD_RELOC_ARC_TLS_IE_GOT:
+ S_SET_THREAD_LOCAL (fixP->fx_addsy);
+ break;
- preprocess_operands (opcode, tok, ntok);
+ case BFD_RELOC_ARC_TLS_GD_LD:
+ gas_assert (!fixP->fx_offset);
+ if (fixP->fx_subsy)
+ fixP->fx_offset
+ = (S_GET_VALUE (fixP->fx_subsy)
+ - fixP->fx_frag->fr_address- fixP->fx_where);
+ fixP->fx_subsy = NULL;
+ /* Fall through. */
+ case BFD_RELOC_ARC_TLS_GD_CALL:
+ /* These two relocs are there just to allow ld to change the tls
+ model for this symbol, by patching the code. The offset -
+ and scale, if any - will be installed by the linker. */
+ S_SET_THREAD_LOCAL (fixP->fx_addsy);
+ break;
- found_something = TRUE;
- opcode = find_opcode_match (opcode, tok, &ntok, pflags, nflgs, &cpumatch);
- if (opcode)
- {
- struct arc_insn insn;
- assemble_insn (opcode, tok, ntok, pflags, nflgs, &insn);
- emit_insn (&insn);
- return;
- }
+ case BFD_RELOC_ARC_TLS_LE_S9:
+ case BFD_RELOC_ARC_TLS_DTPOFF_S9:
+ as_bad (_("TLS_*_S9 relocs are not supported yet"));
+ break;
+
+ default:
+ break;
}
- if (found_something)
+ if (!fixP->fx_done)
{
- if (cpumatch)
- as_bad (_("inappropriate arguments for opcode '%s'"), opname);
- else
- as_bad (_("opcode '%s' not supported for target %s"), opname,
- arc_target_name);
+ return;
}
- else
- as_bad (_("unknown opcode '%s'"), opname);
-}
-
-/* Used to find special case opcode. */
-
-static const struct arc_opcode *
-find_special_case (const char *opname,
- int *nflgs,
- struct arc_flags *pflags,
- expressionS *tok,
- int *ntok)
-{
- const struct arc_opcode *opcode;
-
- opcode = find_special_case_pseudo (opname, ntok, tok, nflgs, pflags);
-
- if (opcode == NULL)
- opcode = find_special_case_flag (opname, nflgs, pflags);
- return opcode;
-}
+ /* Addjust the value if we have a constant. */
+ value += fx_offset;
-/* Swap operand tokens. */
+ /* For hosts with longs bigger than 32-bits make sure that the top
+ bits of a 32-bit negative value read in by the parser are set,
+ so that the correct comparisons are made. */
+ if (value & 0x80000000)
+ value |= (-1L << 31);
-static void
-swap_operand (expressionS *operand_array,
- unsigned source,
- unsigned destination)
-{
- expressionS cpy_operand;
- expressionS *src_operand;
- expressionS *dst_operand;
- size_t size;
+ reloc = fixP->fx_r_type;
+ switch (reloc)
+ {
+ case BFD_RELOC_8:
+ case BFD_RELOC_16:
+ case BFD_RELOC_24:
+ case BFD_RELOC_32:
+ case BFD_RELOC_64:
+ case BFD_RELOC_ARC_32_PCREL:
+ md_number_to_chars (fixpos, value, fixP->fx_size);
+ return;
- if (source == destination)
- return;
+ case BFD_RELOC_ARC_GOTPC32:
+ /* I cannot fix an GOTPC relocation because I need to relax it
+ from ld rx,[pcl,@sym@gotpc] to add rx,pcl,@sym@gotpc. */
+ as_bad (_("Unsupported operation on reloc"));
+ return;
- src_operand = &operand_array[source];
- dst_operand = &operand_array[destination];
- size = sizeof (expressionS);
+ case BFD_RELOC_ARC_TLS_DTPOFF:
+ case BFD_RELOC_ARC_TLS_LE_32:
+ gas_assert (!fixP->fx_addsy);
+ gas_assert (!fixP->fx_subsy);
- /* Make copy of operand to swap with and swap. */
- memcpy (&cpy_operand, dst_operand, size);
- memcpy (dst_operand, src_operand, size);
- memcpy (src_operand, &cpy_operand, size);
-}
+ case BFD_RELOC_ARC_GOTOFF:
+ case BFD_RELOC_ARC_32_ME:
+ case BFD_RELOC_ARC_PC32:
+ md_number_to_chars_midend (fixpos, value, fixP->fx_size);
+ return;
-/* Check if *op matches *tok type.
- Returns FALSE if they don't match, TRUE if they match. */
+ case BFD_RELOC_ARC_PLT32:
+ md_number_to_chars_midend (fixpos, value, fixP->fx_size);
+ return;
-static bfd_boolean
-pseudo_operand_match (const expressionS *tok,
- const struct arc_operand_operation *op)
-{
- offsetT min, max, val;
- bfd_boolean ret;
- const struct arc_operand *operand_real = &arc_operands[op->operand_idx];
+ case BFD_RELOC_ARC_S25H_PCREL_PLT:
+ reloc = BFD_RELOC_ARC_S25W_PCREL;
+ goto solve_plt;
- ret = FALSE;
- switch (tok->X_op)
- {
- case O_constant:
- if (operand_real->bits == 32 && (operand_real->flags & ARC_OPERAND_LIMM))
- ret = 1;
- else if (!(operand_real->flags & ARC_OPERAND_IR))
- {
- val = tok->X_add_number + op->count;
- if (operand_real->flags & ARC_OPERAND_SIGNED)
- {
- max = (1 << (operand_real->bits - 1)) - 1;
- min = -(1 << (operand_real->bits - 1));
- }
- else
- {
- max = (1 << operand_real->bits) - 1;
- min = 0;
- }
- if (min <= val && val <= max)
- ret = TRUE;
- }
- break;
+ case BFD_RELOC_ARC_S21H_PCREL_PLT:
+ reloc = BFD_RELOC_ARC_S21H_PCREL;
+ goto solve_plt;
- case O_symbol:
- /* Handle all symbols as long immediates or signed 9. */
- if (operand_real->flags & ARC_OPERAND_LIMM ||
- ((operand_real->flags & ARC_OPERAND_SIGNED) && operand_real->bits == 9))
- ret = TRUE;
- break;
+ case BFD_RELOC_ARC_S25W_PCREL_PLT:
+ reloc = BFD_RELOC_ARC_S25W_PCREL;
+ goto solve_plt;
- case O_register:
- if (operand_real->flags & ARC_OPERAND_IR)
- ret = TRUE;
- break;
+ case BFD_RELOC_ARC_S21W_PCREL_PLT:
+ reloc = BFD_RELOC_ARC_S21W_PCREL;
- case O_bracket:
- if (operand_real->flags & ARC_OPERAND_BRAKET)
- ret = TRUE;
+ case BFD_RELOC_ARC_S25W_PCREL:
+ case BFD_RELOC_ARC_S21W_PCREL:
+ case BFD_RELOC_ARC_S21H_PCREL:
+ case BFD_RELOC_ARC_S25H_PCREL:
+ case BFD_RELOC_ARC_S13_PCREL:
+ solve_plt:
+ operand = find_operand_for_reloc (reloc);
+ gas_assert (operand);
break;
default:
- /* Unknown. */
- break;
- }
- return ret;
-}
+ {
+ if ((int) fixP->fx_r_type >= 0)
+ as_fatal (_("unhandled relocation type %s"),
+ bfd_get_reloc_code_name (fixP->fx_r_type));
-/* Find pseudo instruction in array. */
+ /* The rest of these fixups needs to be completely resolved as
+ constants. */
+ if (fixP->fx_addsy != 0
+ && S_GET_SEGMENT (fixP->fx_addsy) != absolute_section)
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("non-absolute expression in constant field"));
-static const struct arc_pseudo_insn *
-find_pseudo_insn (const char *opname,
- int ntok,
- const expressionS *tok)
-{
- const struct arc_pseudo_insn *pseudo_insn = NULL;
- const struct arc_operand_operation *op;
- unsigned int i;
- int j;
+ gas_assert (-(int) fixP->fx_r_type < (int) arc_num_operands);
+ operand = &arc_operands[-(int) fixP->fx_r_type];
+ break;
+ }
+ }
- for (i = 0; i < arc_num_pseudo_insn; ++i)
+ if (target_big_endian)
{
- pseudo_insn = &arc_pseudo_insns[i];
- if (strcmp (pseudo_insn->mnemonic_p, opname) == 0)
+ switch (fixP->fx_size)
{
- op = pseudo_insn->operand;
- for (j = 0; j < ntok; ++j)
- if (!pseudo_operand_match (&tok[j], &op[j]))
- break;
-
- /* Found the right instruction. */
- if (j == ntok)
- return pseudo_insn;
+ case 4:
+ insn = bfd_getb32 (fixpos);
+ break;
+ case 2:
+ insn = bfd_getb16 (fixpos);
+ break;
+ default:
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("unknown fixup size"));
+ }
+ }
+ else
+ {
+ insn = 0;
+ switch (fixP->fx_size)
+ {
+ case 4:
+ insn = bfd_getl16 (fixpos) << 16 | bfd_getl16 (fixpos + 2);
+ break;
+ case 2:
+ insn = bfd_getl16 (fixpos);
+ break;
+ default:
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("unknown fixup size"));
}
}
- return NULL;
-}
-
-/* Assumes the expressionS *tok is of sufficient size. */
-
-static const struct arc_opcode *
-find_special_case_pseudo (const char *opname,
- int *ntok,
- expressionS *tok,
- int *nflgs,
- struct arc_flags *pflags)
-{
- const struct arc_pseudo_insn *pseudo_insn = NULL;
- const struct arc_operand_operation *operand_pseudo;
- const struct arc_operand *operand_real;
- unsigned i;
- char construct_operand[MAX_CONSTR_STR];
- /* Find whether opname is in pseudo instruction array. */
- pseudo_insn = find_pseudo_insn (opname, *ntok, tok);
+ insn = insert_operand (insn, operand, (offsetT) value,
+ fixP->fx_file, fixP->fx_line);
- if (pseudo_insn == NULL)
- return NULL;
+ md_number_to_chars_midend (fixpos, insn, fixP->fx_size);
+}
- /* Handle flag, Limited to one flag at the moment. */
- if (pseudo_insn->flag_r != NULL)
- *nflgs += tokenize_flags (pseudo_insn->flag_r, &pflags[*nflgs],
- MAX_INSN_FLGS - *nflgs);
+/* Prepare machine-dependent frags for relaxation.
- /* Handle operand operations. */
- for (i = 0; i < pseudo_insn->operand_cnt; ++i)
- {
- operand_pseudo = &pseudo_insn->operand[i];
- operand_real = &arc_operands[operand_pseudo->operand_idx];
+ Called just before relaxation starts. Any symbol that is now undefined
+ will not become defined.
- if (operand_real->flags & ARC_OPERAND_BRAKET &&
- !operand_pseudo->needs_insert)
- continue;
+ Return the correct fr_subtype in the frag.
- /* Has to be inserted (i.e. this token does not exist yet). */
- if (operand_pseudo->needs_insert)
- {
- if (operand_real->flags & ARC_OPERAND_BRAKET)
- {
- tok[i].X_op = O_bracket;
- ++(*ntok);
- continue;
- }
+ Return the initial "guess for fr_var" to caller. The guess for fr_var
+ is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix
+ or fr_var contributes to our returned value.
- /* Check if operand is a register or constant and handle it
- by type. */
- if (operand_real->flags & ARC_OPERAND_IR)
- snprintf (construct_operand, MAX_CONSTR_STR, "r%d",
- operand_pseudo->count);
- else
- snprintf (construct_operand, MAX_CONSTR_STR, "%d",
- operand_pseudo->count);
+ Although it may not be explicit in the frag, pretend
+ fr_var starts with a value. */
- tokenize_arguments (construct_operand, &tok[i], 1);
- ++(*ntok);
- }
+int
+md_estimate_size_before_relax (fragS *fragP,
+ segT segment)
+{
+ int growth;
+
+ /* If the symbol is not located within the same section AND it's not
+ an absolute section, use the maximum. OR if the symbol is a
+ constant AND the insn is by nature not pc-rel, use the maximum.
+ OR if the symbol is being equated against another symbol, use the
+ maximum. OR if the symbol is weak use the maximum. */
+ if ((S_GET_SEGMENT (fragP->fr_symbol) != segment
+ && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section)
+ || (symbol_constant_p (fragP->fr_symbol)
+ && !fragP->tc_frag_data.pcrel)
+ || symbol_equated_p (fragP->fr_symbol)
+ || S_IS_WEAK (fragP->fr_symbol))
+ {
+ while (md_relax_table[fragP->fr_subtype].rlx_more != ARC_RLX_NONE)
+ ++fragP->fr_subtype;
+ }
- else if (operand_pseudo->count)
- {
- /* Operand number has to be adjusted accordingly (by operand
- type). */
- switch (tok[i].X_op)
- {
- case O_constant:
- tok[i].X_add_number += operand_pseudo->count;
- break;
+ growth = md_relax_table[fragP->fr_subtype].rlx_length;
+ fragP->fr_var = growth;
- case O_symbol:
- break;
+ pr_debug ("%s:%d: md_estimate_size_before_relax: %d\n",
+ fragP->fr_file, fragP->fr_line, growth);
- default:
- /* Ignored. */
- break;
- }
- }
- }
+ return growth;
+}
- /* Swap operands if necessary. Only supports one swap at the
- moment. */
- for (i = 0; i < pseudo_insn->operand_cnt; ++i)
- {
- operand_pseudo = &pseudo_insn->operand[i];
+/* Translate internal representation of relocation info to BFD target
+ format. */
- if (operand_pseudo->swap_operand_idx == i)
- continue;
+arelent *
+tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
+ fixS *fixP)
+{
+ arelent *reloc;
+ bfd_reloc_code_real_type code;
- swap_operand (tok, i, operand_pseudo->swap_operand_idx);
+ reloc = (arelent *) xmalloc (sizeof (* reloc));
+ reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
+ *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
+ reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
- /* Prevent a swap back later by breaking out. */
- break;
- }
+ /* Make sure none of our internal relocations make it this far.
+ They'd better have been fully resolved by this point. */
+ gas_assert ((int) fixP->fx_r_type > 0);
- return (const struct arc_opcode *)
- hash_find (arc_opcode_hash, pseudo_insn->mnemonic_r);
-}
+ code = fixP->fx_r_type;
-static const struct arc_opcode *
-find_special_case_flag (const char *opname,
- int *nflgs,
- struct arc_flags *pflags)
-{
- unsigned int i;
- const char *flagnm;
- unsigned flag_idx, flag_arr_idx;
- size_t flaglen, oplen;
- const struct arc_flag_special *arc_flag_special_opcode;
- const struct arc_opcode *opcode;
+ /* if we have something like add gp, pcl,
+ _GLOBAL_OFFSET_TABLE_@gotpc. */
+ if (code == BFD_RELOC_ARC_GOTPC32
+ && GOT_symbol
+ && fixP->fx_addsy == GOT_symbol)
+ code = BFD_RELOC_ARC_GOTPC;
- /* Search for special case instruction. */
- for (i = 0; i < arc_num_flag_special; i++)
+ reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
+ if (reloc->howto == NULL)
{
- arc_flag_special_opcode = &arc_flag_special_cases[i];
- oplen = strlen (arc_flag_special_opcode->name);
-
- if (strncmp (opname, arc_flag_special_opcode->name, oplen) != 0)
- continue;
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("cannot represent `%s' relocation in object file"),
+ bfd_get_reloc_code_name (code));
+ return NULL;
+ }
- /* Found a potential special case instruction, now test for
- flags. */
- for (flag_arr_idx = 0;; ++flag_arr_idx)
- {
- flag_idx = arc_flag_special_opcode->flags[flag_arr_idx];
- if (flag_idx == 0)
- break; /* End of array, nothing found. */
+ if (!fixP->fx_pcrel != !reloc->howto->pc_relative)
+ as_fatal (_("internal error? cannot generate `%s' relocation"),
+ bfd_get_reloc_code_name (code));
- flagnm = arc_flag_operands[flag_idx].name;
- flaglen = strlen (flagnm);
- if (strcmp (opname + oplen, flagnm) == 0)
- {
- opcode = (const struct arc_opcode *)
- hash_find (arc_opcode_hash,
- arc_flag_special_opcode->name);
+ gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
- if (*nflgs + 1 > MAX_INSN_FLGS)
- break;
- memcpy (pflags[*nflgs].name, flagnm, flaglen);
- pflags[*nflgs].name[flaglen] = '\0';
- (*nflgs)++;
- return opcode;
- }
+ if (code == BFD_RELOC_ARC_TLS_DTPOFF
+ || code == BFD_RELOC_ARC_TLS_DTPOFF_S9)
+ {
+ asymbol *sym
+ = fixP->fx_subsy ? symbol_get_bfdsym (fixP->fx_subsy) : NULL;
+ /* We just want to store a 24 bit index, but we have to wait
+ till after write_contents has been called via
+ bfd_map_over_sections before we can get the index from
+ _bfd_elf_symbol_from_bfd_symbol. Thus, the write_relocs
+ function is elf32-arc.c has to pick up the slack.
+ Unfortunately, this leads to problems with hosts that have
+ pointers wider than long (bfd_vma). There would be various
+ ways to handle this, all error-prone :-( */
+ reloc->addend = (bfd_vma) sym;
+ if ((asymbol *) reloc->addend != sym)
+ {
+ as_bad ("Can't store pointer\n");
+ return NULL;
}
}
- return NULL;
+ else
+ reloc->addend = fixP->fx_offset;
+
+ return reloc;
}
-/* Check whether a symbol involves a register. */
+/* Perform post-processing of machine-dependent frags after relaxation.
+ Called after relaxation is finished.
+ In: Address of frag.
+ fr_type == rs_machine_dependent.
+ fr_subtype is what the address relaxed to.
-static int
-contains_register (symbolS *sym)
+ Out: Any fixS:s and constants are set up. */
+
+void
+md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
+ segT segment ATTRIBUTE_UNUSED,
+ fragS *fragP)
{
- if (sym)
- {
- expressionS *ex = symbol_get_value_expression (sym);
- return ((O_register == ex->X_op)
- && !contains_register (ex->X_add_symbol)
- && !contains_register (ex->X_op_symbol));
- }
- else
- return 0;
-}
+ const relax_typeS *table_entry;
+ char *dest;
+ const struct arc_opcode *opcode;
+ struct arc_insn insn;
+ int size, fix;
+ struct arc_relax_type *relax_arg = &fragP->tc_frag_data;
-/* Returns the register number within a symbol. */
+ fix = (fragP->fr_fix < 0 ? 0 : fragP->fr_fix);
+ dest = fragP->fr_literal + fix;
+ table_entry = TC_GENERIC_RELAX_TABLE + fragP->fr_subtype;
-static int
-get_register (symbolS *sym)
-{
- if (!contains_register (sym))
- return -1;
+ pr_debug ("%s:%d: md_convert_frag, subtype: %d, fix: %d, var: %d\n",
+ fragP->fr_file, fragP->fr_line,
+ fragP->fr_subtype, fix, fragP->fr_var);
- expressionS *ex = symbol_get_value_expression (sym);
- return regno (ex->X_add_number);
-}
+ if (fragP->fr_subtype <= 0
+ && fragP->fr_subtype >= arc_num_relax_opcodes)
+ as_fatal (_("no relaxation found for this instruction."));
-/* Allocates a tok entry. */
+ opcode = &arc_relax_opcodes[fragP->fr_subtype];
-static int
-allocate_tok (expressionS *tok, int ntok, int cidx)
-{
- if (ntok > MAX_INSN_ARGS - 2)
- return 0; /* No space left. */
+ assemble_insn (opcode, relax_arg->tok, relax_arg->ntok, relax_arg->pflags,
+ relax_arg->nflg, &insn);
- if (cidx > ntok)
- return 0; /* Incorect args. */
+ apply_fixups (&insn, fragP, fix);
- memcpy (&tok[ntok+1], &tok[ntok], sizeof (*tok));
+ size = insn.short_insn ? (insn.has_limm ? 6 : 2) : (insn.has_limm ? 8 : 4);
+ gas_assert (table_entry->rlx_length == size);
+ emit_insn0 (&insn, dest, TRUE);
- if (cidx == ntok)
- return 1; /* Success. */
- return allocate_tok (tok, ntok - 1, cidx);
+ fragP->fr_fix += table_entry->rlx_length;
+ fragP->fr_var = 0;
}
-/* Return true if a RELOC is generic. A generic reloc is PC-rel of a
- simple ME relocation (e.g. RELOC_ARC_32_ME, BFD_RELOC_ARC_PC32. */
+/* We have no need to default values of symbols. We could catch
+ register names here, but that is handled by inserting them all in
+ the symbol table to begin with. */
-static bfd_boolean
-generic_reloc_p (extended_bfd_reloc_code_real_type reloc)
+symbolS *
+md_undefined_symbol (char *name)
{
- if (!reloc)
- return FALSE;
-
- switch (reloc)
+ /* The arc abi demands that a GOT[0] should be referencible as
+ [pc+_DYNAMIC@gotpc]. Hence we convert a _DYNAMIC@gotpc to a
+ GOTPC reference to _GLOBAL_OFFSET_TABLE_. */
+ if (((*name == '_')
+ && (*(name+1) == 'G')
+ && (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0))
+ || ((*name == '_')
+ && (*(name+1) == 'D')
+ && (strcmp (name, DYNAMIC_STRUCT_NAME) == 0)))
{
- case BFD_RELOC_ARC_SDA_LDST:
- case BFD_RELOC_ARC_SDA_LDST1:
- case BFD_RELOC_ARC_SDA_LDST2:
- case BFD_RELOC_ARC_SDA16_LD:
- case BFD_RELOC_ARC_SDA16_LD1:
- case BFD_RELOC_ARC_SDA16_LD2:
- case BFD_RELOC_ARC_SDA16_ST2:
- case BFD_RELOC_ARC_SDA32_ME:
- return FALSE;
- default:
- break;
+ if (!GOT_symbol)
+ {
+ if (symbol_find (name))
+ as_bad ("GOT already in symbol table");
+
+ GOT_symbol = symbol_new (GLOBAL_OFFSET_TABLE_NAME, undefined_section,
+ (valueT) 0, &zero_address_frag);
+ };
+ return GOT_symbol;
}
- return TRUE;
+ return NULL;
}
-/* Search forward through all variants of an opcode looking for a
- syntax match. */
+/* Turn a string in input_line_pointer into a floating point constant
+ of type type, and store the appropriate bytes in *litP. The number
+ of LITTLENUMS emitted is stored in *sizeP. An error message is
+ returned, or NULL on OK. */
-static const struct arc_opcode *
-find_opcode_match (const struct arc_opcode *first_opcode,
- expressionS *tok,
- int *pntok,
- struct arc_flags *first_pflag,
- int nflgs,
- int *pcpumatch)
+char *
+md_atof (int type, char *litP, int *sizeP)
{
- const struct arc_opcode *opcode = first_opcode;
- int ntok = *pntok;
- int got_cpu_match = 0;
- expressionS bktok[MAX_INSN_ARGS];
- int bkntok;
- expressionS emptyE;
+ return ieee_md_atof (type, litP, sizeP, target_big_endian);
+}
- memset (&emptyE, 0, sizeof (emptyE));
- memcpy (bktok, tok, MAX_INSN_ARGS * sizeof (*tok));
- bkntok = ntok;
+/* Called for any expression that can not be recognized. When the
+ function is called, `input_line_pointer' will point to the start of
+ the expression. */
- do
+void
+md_operand (expressionS *expressionP ATTRIBUTE_UNUSED)
+{
+ char *p = input_line_pointer;
+ if (*p == '@')
{
- const unsigned char *opidx;
- const unsigned char *flgidx;
- int tokidx = 0;
- const expressionS *t = &emptyE;
-
- pr_debug ("%s:%d: find_opcode_match: trying opcode 0x%08X ",
- frag_now->fr_file, frag_now->fr_line, opcode->opcode);
-
- /* Don't match opcodes that don't exist on this
- architecture. */
- if (!(opcode->cpu & arc_target))
- goto match_failed;
-
- if (is_code_density_p (opcode) && !(arc_features & ARC_CD))
- goto match_failed;
+ input_line_pointer++;
+ expressionP->X_op = O_symbol;
+ expression (expressionP);
+ }
+}
- got_cpu_match = 1;
- pr_debug ("cpu ");
+/* This function is called from the function 'expression', it attempts
+ to parse special names (in our case register names). It fills in
+ the expression with the identified register. It returns TRUE if
+ it is a register and FALSE otherwise. */
- /* Check the operands. */
- for (opidx = opcode->operands; *opidx; ++opidx)
- {
- const struct arc_operand *operand = &arc_operands[*opidx];
+bfd_boolean
+arc_parse_name (const char *name,
+ struct expressionS *e)
+{
+ struct symbol *sym;
- /* Only take input from real operands. */
- if ((operand->flags & ARC_OPERAND_FAKE)
- && !(operand->flags & ARC_OPERAND_BRAKET))
- continue;
+ if (!assembling_insn)
+ return FALSE;
- /* When we expect input, make sure we have it. */
- if (tokidx >= ntok)
- goto match_failed;
+ /* Handle only registers. */
+ if (e->X_op != O_absent)
+ return FALSE;
- /* Match operand type with expression type. */
- switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK)
- {
- case ARC_OPERAND_IR:
- /* Check to be a register. */
- if ((tok[tokidx].X_op != O_register
- || !is_ir_num (tok[tokidx].X_add_number))
- && !(operand->flags & ARC_OPERAND_IGNORE))
- goto match_failed;
+ sym = hash_find (arc_reg_hash, name);
+ if (sym)
+ {
+ e->X_op = O_register;
+ e->X_add_number = S_GET_VALUE (sym);
+ return TRUE;
+ }
+ return FALSE;
+}
- /* If expect duplicate, make sure it is duplicate. */
- if (operand->flags & ARC_OPERAND_DUPLICATE)
- {
- /* Check for duplicate. */
- if (t->X_op != O_register
- || !is_ir_num (t->X_add_number)
- || (regno (t->X_add_number) !=
- regno (tok[tokidx].X_add_number)))
- goto match_failed;
- }
+/* md_parse_option
+ Invocation line includes a switch not recognized by the base assembler.
+ See if it's a processor-specific option.
- /* Special handling? */
- if (operand->insert)
- {
- const char *errmsg = NULL;
- (*operand->insert)(0,
- regno (tok[tokidx].X_add_number),
- &errmsg);
- if (errmsg)
- {
- if (operand->flags & ARC_OPERAND_IGNORE)
- {
- /* Missing argument, create one. */
- if (!allocate_tok (tok, ntok - 1, tokidx))
- goto match_failed;
+ New options (supported) are:
- tok[tokidx].X_op = O_absent;
- ++ntok;
- }
- else
- goto match_failed;
- }
- }
+ -mcpu=<cpu name> Assemble for selected processor
+ -EB/-mbig-endian Big-endian
+ -EL/-mlittle-endian Little-endian
+ -mrelax Enable relaxation
- t = &tok[tokidx];
- break;
+ The following CPU names are recognized:
+ arc700, av2em, av2hs. */
- case ARC_OPERAND_BRAKET:
- /* Check if bracket is also in opcode table as
- operand. */
- if (tok[tokidx].X_op != O_bracket)
- goto match_failed;
- break;
+int
+md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
+{
+ int cpu_flags = EF_ARC_CPU_GENERIC;
- case ARC_OPERAND_LIMM:
- case ARC_OPERAND_SIGNED:
- case ARC_OPERAND_UNSIGNED:
- switch (tok[tokidx].X_op)
- {
- case O_illegal:
- case O_absent:
- case O_register:
- goto match_failed;
+ switch (c)
+ {
+ case OPTION_ARC600:
+ case OPTION_ARC601:
+ return md_parse_option (OPTION_MCPU, "arc600");
- case O_bracket:
- /* Got an (too) early bracket, check if it is an
- ignored operand. N.B. This procedure works only
- when bracket is the last operand! */
- if (!(operand->flags & ARC_OPERAND_IGNORE))
- goto match_failed;
- /* Insert the missing operand. */
- if (!allocate_tok (tok, ntok - 1, tokidx))
- goto match_failed;
+ case OPTION_ARC700:
+ return md_parse_option (OPTION_MCPU, "arc700");
- tok[tokidx].X_op = O_absent;
- ++ntok;
- break;
+ case OPTION_ARCEM:
+ return md_parse_option (OPTION_MCPU, "arcem");
- case O_constant:
- /* Check the range. */
- if (operand->bits != 32
- && !(operand->flags & ARC_OPERAND_NCHK))
- {
- offsetT min, max, val;
- val = tok[tokidx].X_add_number;
+ case OPTION_ARCHS:
+ return md_parse_option (OPTION_MCPU, "archs");
- if (operand->flags & ARC_OPERAND_SIGNED)
- {
- max = (1 << (operand->bits - 1)) - 1;
- min = -(1 << (operand->bits - 1));
- }
- else
- {
- max = (1 << operand->bits) - 1;
- min = 0;
- }
+ case OPTION_MCPU:
+ {
+ int i;
+ char *s = alloca (strlen (arg) + 1);
- if (val < min || val > max)
- goto match_failed;
+ {
+ char *t = s;
+ char *arg1 = arg;
- /* Check alignmets. */
- if ((operand->flags & ARC_OPERAND_ALIGNED32)
- && (val & 0x03))
- goto match_failed;
+ do
+ *t = TOLOWER (*arg1++);
+ while (*t++);
+ }
- if ((operand->flags & ARC_OPERAND_ALIGNED16)
- && (val & 0x01))
- goto match_failed;
- }
- else if (operand->flags & ARC_OPERAND_NCHK)
- {
- if (operand->insert)
- {
- const char *errmsg = NULL;
- (*operand->insert)(0,
- tok[tokidx].X_add_number,
- &errmsg);
- if (errmsg)
- goto match_failed;
- }
- else
- goto match_failed;
- }
- break;
+ for (i = 0; cpu_types[i].name; ++i)
+ {
+ if (!strcmp (cpu_types[i].name, s))
+ {
+ arc_target = cpu_types[i].flags;
+ arc_target_name = cpu_types[i].name;
+ arc_features = cpu_types[i].features;
+ arc_mach_type = cpu_types[i].mach;
+ cpu_flags = cpu_types[i].eflags;
- case O_subtract:
- /* Check if it is register range. */
- if ((tok[tokidx].X_add_number == 0)
- && contains_register (tok[tokidx].X_add_symbol)
- && contains_register (tok[tokidx].X_op_symbol))
- {
- int regs;
+ mach_type_specified_p = 1;
+ break;
+ }
+ }
- regs = get_register (tok[tokidx].X_add_symbol);
- regs <<= 16;
- regs |= get_register (tok[tokidx].X_op_symbol);
- if (operand->insert)
- {
- const char *errmsg = NULL;
- (*operand->insert)(0,
- regs,
- &errmsg);
- if (errmsg)
- goto match_failed;
- }
- else
- goto match_failed;
- break;
- }
- default:
- if (operand->default_reloc == 0)
- goto match_failed; /* The operand needs relocation. */
+ if (!cpu_types[i].name)
+ {
+ as_fatal (_("unknown architecture: %s\n"), arg);
+ }
+ break;
+ }
- /* Relocs requiring long immediate. FIXME! make it
- generic and move it to a function. */
- switch (tok[tokidx].X_md)
- {
- case O_gotoff:
- case O_gotpc:
- case O_pcl:
- case O_tpoff:
- case O_dtpoff:
- case O_tlsgd:
- case O_tlsie:
- if (!(operand->flags & ARC_OPERAND_LIMM))
- goto match_failed;
- case O_absent:
- if (!generic_reloc_p (operand->default_reloc))
- goto match_failed;
- default:
- break;
- }
- break;
- }
- /* If expect duplicate, make sure it is duplicate. */
- if (operand->flags & ARC_OPERAND_DUPLICATE)
- {
- if (t->X_op == O_illegal
- || t->X_op == O_absent
- || t->X_op == O_register
- || (t->X_add_number != tok[tokidx].X_add_number))
- goto match_failed;
- }
- t = &tok[tokidx];
- break;
+ case OPTION_EB:
+ arc_target_format = "elf32-bigarc";
+ byte_order = BIG_ENDIAN;
+ break;
- default:
- /* Everything else should have been fake. */
- abort ();
- }
+ case OPTION_EL:
+ arc_target_format = "elf32-littlearc";
+ byte_order = LITTLE_ENDIAN;
+ break;
- ++tokidx;
- }
- pr_debug ("opr ");
+ case OPTION_CD:
+ /* This option has an effect only on ARC EM. */
+ if (arc_target & ARC_OPCODE_ARCv2EM)
+ arc_features |= ARC_CD;
+ break;
- /* Check the flags. Iterate over the valid flag classes. */
- int lnflg = nflgs;
+ case OPTION_RELAX:
+ relaxation_state = 1;
+ break;
- for (flgidx = opcode->flags; *flgidx && lnflg; ++flgidx)
- {
- /* Get a valid flag class. */
- const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
- const unsigned *flgopridx;
+ case OPTION_USER_MODE:
+ case OPTION_LD_EXT_MASK:
+ case OPTION_SWAP:
+ case OPTION_NORM:
+ case OPTION_BARREL_SHIFT:
+ case OPTION_MIN_MAX:
+ case OPTION_NO_MPY:
+ case OPTION_EA:
+ case OPTION_MUL64:
+ case OPTION_SIMD:
+ case OPTION_SPFP:
+ case OPTION_DPFP:
+ case OPTION_XMAC_D16:
+ case OPTION_XMAC_24:
+ case OPTION_DSP_PACKA:
+ case OPTION_CRC:
+ case OPTION_DVBF:
+ case OPTION_TELEPHONY:
+ case OPTION_XYMEMORY:
+ case OPTION_LOCK:
+ case OPTION_SWAPE:
+ case OPTION_RTSC:
+ case OPTION_FPUDA:
+ /* Dummy options are accepted but have no effect. */
+ break;
- for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
- {
- const struct arc_flag_operand *flg_operand;
- struct arc_flags *pflag = first_pflag;
- int i;
+ default:
+ return 0;
+ }
- flg_operand = &arc_flag_operands[*flgopridx];
- for (i = 0; i < nflgs; i++, pflag++)
- {
- /* Match against the parsed flags. */
- if (!strcmp (flg_operand->name, pflag->name))
- {
- /*TODO: Check if it is duplicated. */
- pflag->code = *flgopridx;
- lnflg--;
- break; /* goto next flag class and parsed flag. */
- }
- }
- }
- }
- /* Did I check all the parsed flags? */
- if (lnflg)
- goto match_failed;
+ if (cpu_flags != EF_ARC_CPU_GENERIC)
+ arc_eflag = (arc_eflag & ~EF_ARC_MACH_MSK) | cpu_flags;
- pr_debug ("flg");
- /* Possible match -- did we use all of our input? */
- if (tokidx == ntok)
- {
- *pntok = ntok;
- pr_debug ("\n");
- return opcode;
- }
+ return 1;
+}
- match_failed:;
- pr_debug ("\n");
- /* Restore the original parameters. */
- memcpy (tok, bktok, MAX_INSN_ARGS * sizeof (*tok));
- ntok = bkntok;
- }
- while (++opcode - arc_opcodes < (int) arc_num_opcodes
- && !strcmp (opcode->name, first_opcode->name));
+void
+md_show_usage (FILE *stream)
+{
+ fprintf (stream, _("ARC-specific assembler options:\n"));
- if (*pcpumatch)
- *pcpumatch = got_cpu_match;
+ fprintf (stream, " -mcpu=<cpu name>\t assemble for CPU <cpu name>\n");
+ fprintf (stream,
+ " -mcode-density\t enable code density option for ARC EM\n");
+
+ fprintf (stream, _("\
+ -EB assemble code for a big-endian cpu\n"));
+ fprintf (stream, _("\
+ -EL assemble code for a little-endian cpu\n"));
+ fprintf (stream, _("\
+ -mrelax Enable relaxation\n"));
- return NULL;
}
/* Find the proper relocation for the given opcode. */
return ret;
}
+/* All the symbol types that are allowed to be used for
+ relaxation. */
+
+static bfd_boolean
+may_relax_expr (expressionS tok)
+{
+ /* Check if we have unrelaxable relocs. */
+ switch (tok.X_md)
+ {
+ default:
+ break;
+ case O_plt:
+ return FALSE;
+ }
+
+ switch (tok.X_op)
+ {
+ case O_symbol:
+ case O_multiply:
+ case O_divide:
+ case O_modulus:
+ case O_add:
+ case O_subtract:
+ break;
+
+ default:
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* Checks if flags are in line with relaxable insn. */
+
+static bfd_boolean
+relaxable_flag (const struct arc_relaxable_ins *ins,
+ const struct arc_flags *pflags,
+ int nflgs)
+{
+ unsigned flag_class,
+ flag,
+ flag_class_idx = 0,
+ flag_idx = 0;
+
+ const struct arc_flag_operand *flag_opand;
+ int i, counttrue = 0;
+
+ /* Iterate through flags classes. */
+ while ((flag_class = ins->flag_classes[flag_class_idx]) != 0)
+ {
+ /* Iterate through flags in flag class. */
+ while ((flag = arc_flag_classes[flag_class].flags[flag_idx])
+ != 0)
+ {
+ flag_opand = &arc_flag_operands[flag];
+ /* Iterate through flags in ins to compare. */
+ for (i = 0; i < nflgs; ++i)
+ {
+ if (strcmp (flag_opand->name, pflags[i].name) == 0)
+ ++counttrue;
+ }
+
+ ++flag_idx;
+ }
+
+ ++flag_class_idx;
+ flag_idx = 0;
+ }
+
+ /* If counttrue == nflgs, then all flags have been found. */
+ return (counttrue == nflgs ? TRUE : FALSE);
+}
+
+/* Checks if operands are in line with relaxable insn. */
+
+static bfd_boolean
+relaxable_operand (const struct arc_relaxable_ins *ins,
+ const expressionS *tok,
+ int ntok)
+{
+ const enum rlx_operand_type *operand = &ins->operands[0];
+ int i = 0;
+
+ while (*operand != EMPTY)
+ {
+ const expressionS *epr = &tok[i];
+
+ if (i != 0 && i >= ntok)
+ return FALSE;
+
+ switch (*operand)
+ {
+ case IMMEDIATE:
+ if (!(epr->X_op == O_multiply
+ || epr->X_op == O_divide
+ || epr->X_op == O_modulus
+ || epr->X_op == O_add
+ || epr->X_op == O_subtract
+ || epr->X_op == O_symbol))
+ return FALSE;
+ break;
+
+ case REGISTER_DUP:
+ if ((i <= 0)
+ || (epr->X_add_number != tok[i - 1].X_add_number))
+ return FALSE;
+ /* Fall through. */
+ case REGISTER:
+ if (epr->X_op != O_register)
+ return FALSE;
+ break;
+
+ case REGISTER_S:
+ if (epr->X_op != O_register)
+ return FALSE;
+
+ switch (epr->X_add_number)
+ {
+ case 0: case 1: case 2: case 3:
+ case 12: case 13: case 14: case 15:
+ break;
+ default:
+ return FALSE;
+ }
+ break;
+
+ case REGISTER_NO_GP:
+ if ((epr->X_op != O_register)
+ || (epr->X_add_number == 26)) /* 26 is the gp register. */
+ return FALSE;
+ break;
+
+ case BRACKET:
+ if (epr->X_op != O_bracket)
+ return FALSE;
+ break;
+
+ default:
+ /* Don't understand, bail out. */
+ return FALSE;
+ break;
+ }
+
+ ++i;
+ operand = &ins->operands[i];
+ }
+
+ return (i == ntok ? TRUE : FALSE);
+}
+
+/* Return TRUE if this OPDCODE is a candidate for relaxation. */
+
+static bfd_boolean
+relax_insn_p (const struct arc_opcode *opcode,
+ const expressionS *tok,
+ int ntok,
+ const struct arc_flags *pflags,
+ int nflg)
+{
+ unsigned i;
+ bfd_boolean rv = FALSE;
+
+ /* Check the relaxation table. */
+ for (i = 0; i < arc_num_relaxable_ins && relaxation_state; ++i)
+ {
+ const struct arc_relaxable_ins *arc_rlx_ins = &arc_relaxable_insns[i];
+
+ if ((strcmp (opcode->name, arc_rlx_ins->mnemonic_r) == 0)
+ && may_relax_expr (tok[arc_rlx_ins->opcheckidx])
+ && relaxable_operand (arc_rlx_ins, tok, ntok)
+ && relaxable_flag (arc_rlx_ins, pflags, nflg))
+ {
+ rv = TRUE;
+ frag_now->fr_subtype = arc_relaxable_insns[i].subtype;
+ memcpy (&frag_now->tc_frag_data.tok, tok,
+ sizeof (expressionS) * ntok);
+ memcpy (&frag_now->tc_frag_data.pflags, pflags,
+ sizeof (struct arc_flags) * nflg);
+ frag_now->tc_frag_data.nflg = nflg;
+ frag_now->tc_frag_data.ntok = ntok;
+ break;
+ }
+ }
+
+ return rv;
+}
+
/* Turn an opcode description and a set of arguments into
an instruction and a fixup. */
<< flg_operand->shift;
}
+ insn->relax = relax_insn_p (opcode, tok, ntok, pflags, nflg);
+
/* Short instruction? */
insn->short_insn = ARC_SHORT (opcode->mask) ? TRUE : FALSE;
_("A jump/branch instruction in delay slot."));
}
-/* Actually output an instruction with its fixup. */
-
-static void
-emit_insn (struct arc_insn *insn)
-{
- char *f;
- int i;
-
- pr_debug ("Emit insn : 0x%x\n", insn->insn);
- pr_debug ("\tShort : 0x%d\n", insn->short_insn);
- pr_debug ("\tLong imm: 0x%lx\n", insn->limm);
-
- /* Write out the instruction. */
- if (insn->short_insn)
- {
- if (insn->has_limm)
- {
- f = frag_more (6);
- md_number_to_chars (f, insn->insn, 2);
- md_number_to_chars_midend (f + 2, insn->limm, 4);
- dwarf2_emit_insn (6);
- }
- else
- {
- f = frag_more (2);
- md_number_to_chars (f, insn->insn, 2);
- dwarf2_emit_insn (2);
- }
- }
- else
- {
- if (insn->has_limm)
- {
- f = frag_more (8);
- md_number_to_chars_midend (f, insn->insn, 4);
- md_number_to_chars_midend (f + 4, insn->limm, 4);
- dwarf2_emit_insn (8);
- }
- else
- {
- f = frag_more (4);
- md_number_to_chars_midend (f, insn->insn, 4);
- dwarf2_emit_insn (4);
- }
- }
-
- /* Apply the fixups in order. */
- for (i = 0; i < insn->nfixups; i++)
- {
- struct arc_fixup *fixup = &insn->fixups[i];
- int size, pcrel, offset = 0;
-
- /*FIXME! the reloc size is wrong in the BFD file. When it will
- be fixed please delete me. */
- size = (insn->short_insn && !fixup->islong) ? 2 : 4;
-
- if (fixup->islong)
- offset = (insn->short_insn) ? 2 : 4;
-
- /* Some fixups are only used internally, thus no howto. */
- if ((int) fixup->reloc < 0)
- {
- /*FIXME! the reloc size is wrong in the BFD file. When it
- will be fixed please enable me.
- size = (insn->short_insn && !fixup->islong) ? 2 : 4; */
- pcrel = fixup->pcrel;
- }
- else
- {
- reloc_howto_type *reloc_howto =
- bfd_reloc_type_lookup (stdoutput,
- (bfd_reloc_code_real_type) fixup->reloc);
- gas_assert (reloc_howto);
- /*FIXME! the reloc size is wrong in the BFD file. When it
- will be fixed please enable me.
- size = bfd_get_reloc_size (reloc_howto); */
- pcrel = reloc_howto->pc_relative;
- }
-
- pr_debug ("%s:%d: emit_insn: new %s fixup (PCrel:%s) of size %d @ offset %d\n",
- frag_now->fr_file, frag_now->fr_line,
- (fixup->reloc < 0) ? "Internal" :
- bfd_get_reloc_code_name (fixup->reloc),
- pcrel ? "Y" : "N",
- size, offset);
- fix_new_exp (frag_now, f - frag_now->fr_literal + offset,
- size, &fixup->exp, pcrel, fixup->reloc);
-
- /* Check for ZOLs, and update symbol info if any. */
- if (LP_INSN (insn->insn))
- {
- gas_assert (fixup->exp.X_add_symbol);
- ARC_SET_FLAG (fixup->exp.X_add_symbol, ARC_FLAG_ZOL);
- }
- }
-}
-
-/* Insert an operand value into an instruction. */
-
-static unsigned
-insert_operand (unsigned insn,
- const struct arc_operand *operand,
- offsetT val,
- char *file,
- unsigned line)
-{
- offsetT min = 0, max = 0;
-
- if (operand->bits != 32
- && !(operand->flags & ARC_OPERAND_NCHK)
- && !(operand->flags & ARC_OPERAND_FAKE))
- {
- if (operand->flags & ARC_OPERAND_SIGNED)
- {
- max = (1 << (operand->bits - 1)) - 1;
- min = -(1 << (operand->bits - 1));
- }
- else
- {
- max = (1 << operand->bits) - 1;
- min = 0;
- }
-
- if (val < min || val > max)
- as_bad_value_out_of_range (_("operand"),
- val, min, max, file, line);
- }
-
- pr_debug ("insert field: %ld <= %ld <= %ld in 0x%08x\n",
- min, val, max, insn);
-
- if ((operand->flags & ARC_OPERAND_ALIGNED32)
- && (val & 0x03))
- as_bad_where (file, line,
- _("Unaligned operand. Needs to be 32bit aligned"));
-
- if ((operand->flags & ARC_OPERAND_ALIGNED16)
- && (val & 0x01))
- as_bad_where (file, line,
- _("Unaligned operand. Needs to be 16bit aligned"));
-
- if (operand->insert)
- {
- const char *errmsg = NULL;
-
- insn = (*operand->insert) (insn, val, &errmsg);
- if (errmsg)
- as_warn_where (file, line, "%s", errmsg);
- }
- else
- {
- if (operand->flags & ARC_OPERAND_TRUNCATE)
- {
- if (operand->flags & ARC_OPERAND_ALIGNED32)
- val >>= 2;
- if (operand->flags & ARC_OPERAND_ALIGNED16)
- val >>= 1;
- }
- insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift);
- }
- return insn;
-}
-
void
arc_handle_align (fragS* fragP)
{
dwarf2_emit_label (sym);
}
+
+/* Used because generic relaxation assumes a pc-rel value whilst we
+ also relax instructions that use an absolute value resolved out of
+ relative values (if that makes any sense). An example: 'add r1,
+ r2, @.L2 - .' The symbols . and @.L2 are relative to the section
+ but if they're in the same section we can subtract the section
+ offset relocation which ends up in a resolved value. So if @.L2 is
+ .text + 0x50 and . is .text + 0x10, we can say that .text + 0x50 -
+ .text + 0x40 = 0x10. */
+int
+arc_pcrel_adjust (fragS *fragP)
+{
+ if (!fragP->tc_frag_data.pcrel)
+ return fragP->fr_address + fragP->fr_fix;
+
+ return 0;
+}
projects / deliverable / binutils-gdb.git / commitdiff
