16, 17, 2, 3, 4, 5, 6, 7
};
+/* The microMIPS registers with type b. */
+#define micromips_to_32_reg_b_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type c. */
+#define micromips_to_32_reg_c_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type d. */
+#define micromips_to_32_reg_d_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type e. */
+#define micromips_to_32_reg_e_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type f. */
+#define micromips_to_32_reg_f_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type g. */
+#define micromips_to_32_reg_g_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type h. */
+static const unsigned int micromips_to_32_reg_h_map[] =
+{
+ 5, 5, 6, 4, 4, 4, 4, 4
+};
+
+/* The microMIPS registers with type i. */
+static const unsigned int micromips_to_32_reg_i_map[] =
+{
+ 6, 7, 7, 21, 22, 5, 6, 7
+};
+
+/* The microMIPS registers with type j: 32 registers. */
+
+/* The microMIPS registers with type l. */
+#define micromips_to_32_reg_l_map mips16_to_32_reg_map
+
+/* The microMIPS registers with type m. */
+static const unsigned int micromips_to_32_reg_m_map[] =
+{
+ 0, 17, 2, 3, 16, 18, 19, 20
+};
+
+/* The microMIPS registers with type n. */
+#define micromips_to_32_reg_n_map micromips_to_32_reg_m_map
+
+/* The microMIPS registers with type p: 32 registers. */
+
+/* The microMIPS registers with type q. */
+static const unsigned int micromips_to_32_reg_q_map[] =
+{
+ 0, 17, 2, 3, 4, 5, 6, 7
+};
+
+/* reg type s is $29. */
+
+/* reg type t is the same as the last register. */
+
+/* reg type y is $31. */
+
+/* reg type z is $0. */
+
+/* micromips imm B type. */
+static const int micromips_imm_b_map[8] =
+{
+ 1, 4, 8, 12, 16, 20, 24, -1
+};
+
+/* micromips imm C type. */
+static const int micromips_imm_c_map[16] =
+{
+ 128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 255, 32768, 65535
+};
+
+/* micromips imm D type: (-512..511)<<1. */
+/* micromips imm E type: (-64..63)<<1. */
+/* micromips imm F type: (0..63). */
+/* micromips imm G type: (-1..14). */
+/* micromips imm H type: (0..15)<<1. */
+/* micromips imm I type: (-1..126). */
+/* micromips imm J type: (0..15)<<2. */
+/* micromips imm L type: (0..15). */
+/* micromips imm M type: (1..8). */
+/* micromips imm W type: (0..63)<<2. */
+/* micromips imm X type: (-8..7). */
+/* micromips imm Y type: (-258..-3, 2..257)<<2. */
+
#define mips16_reg_names(rn) mips_gpr_names[mips16_to_32_reg_map[rn]]
values. */
static int mips_processor;
static int mips_isa;
+static int micromips_ase;
static const char * const *mips_gpr_names;
static const char * const *mips_fpr_names;
static const char * const *mips_cp0_names;
return 0;
}
+/* Check if the object has microMIPS ASE code. */
+
+static int
+is_micromips (Elf_Internal_Ehdr *header)
+{
+ if ((header->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS) != 0)
+ return 1;
+
+ return 0;
+}
+
static void
set_default_mips_dis_options (struct disassemble_info *info)
{
const struct mips_arch_choice *chosen_arch;
- /* Defaults: mipsIII/r3000 (?!), (o)32-style ("oldabi") GPR names,
- and numeric FPR, CP0 register, and HWR names. */
+ /* Defaults: mipsIII/r3000 (?!), no microMIPS ASE (any compressed code
+ is MIPS16 ASE) (o)32-style ("oldabi") GPR names, and numeric FPR,
+ CP0 register, and HWR names. */
mips_isa = ISA_MIPS3;
- mips_processor = CPU_R3000;
+ mips_processor = CPU_R3000;
+ micromips_ase = 0;
mips_gpr_names = mips_gpr_names_oldabi;
mips_fpr_names = mips_fpr_names_numeric;
mips_cp0_names = mips_cp0_names_numeric;
mips_hwr_names = mips_hwr_names_numeric;
no_aliases = 0;
- /* If an ELF "newabi" binary, use the n32/(n)64 GPR names. */
+ /* Update settings according to the ELF file header flags. */
if (info->flavour == bfd_target_elf_flavour && info->section != NULL)
{
Elf_Internal_Ehdr *header;
header = elf_elfheader (info->section->owner);
+ /* If an ELF "newabi" binary, use the n32/(n)64 GPR names. */
if (is_newabi (header))
mips_gpr_names = mips_gpr_names_newabi;
+ /* If a microMIPS binary, then don't use MIPS16 bindings. */
+ micromips_ase = is_micromips (header);
}
/* Set ISA, architecture, and cp0 register names as best we can. */
return length;
}
+/* Disassemble microMIPS instructions. */
+
+static int
+print_insn_micromips (bfd_vma memaddr, struct disassemble_info *info)
+{
+ const fprintf_ftype iprintf = info->fprintf_func;
+ const struct mips_opcode *op, *opend;
+ unsigned int lsb, msbd, msb;
+ void *is = info->stream;
+ unsigned int regno;
+ bfd_byte buffer[2];
+ int lastregno = 0;
+ int higher;
+ int length;
+ int status;
+ int delta;
+ int immed;
+ int insn;
+
+ lsb = 0;
+
+ info->bytes_per_chunk = 2;
+ info->display_endian = info->endian;
+ info->insn_info_valid = 1;
+ info->branch_delay_insns = 0;
+ info->data_size = 0;
+ info->insn_type = dis_nonbranch;
+ info->target = 0;
+ info->target2 = 0;
+
+ status = (*info->read_memory_func) (memaddr, buffer, 2, info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, memaddr, info);
+ return -1;
+ }
+
+ length = 2;
+
+ if (info->endian == BFD_ENDIAN_BIG)
+ insn = bfd_getb16 (buffer);
+ else
+ insn = bfd_getl16 (buffer);
+
+ if ((insn & 0xfc00) == 0x7c00)
+ {
+ /* This is a 48-bit microMIPS instruction. */
+ higher = insn;
+
+ status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
+ if (status != 0)
+ {
+ iprintf (is, "micromips 0x%x", higher);
+ (*info->memory_error_func) (status, memaddr + 2, info);
+ return -1;
+ }
+ if (info->endian == BFD_ENDIAN_BIG)
+ insn = bfd_getb16 (buffer);
+ else
+ insn = bfd_getl16 (buffer);
+ higher = (higher << 16) | insn;
+
+ status = (*info->read_memory_func) (memaddr + 4, buffer, 2, info);
+ if (status != 0)
+ {
+ iprintf (is, "micromips 0x%x", higher);
+ (*info->memory_error_func) (status, memaddr + 4, info);
+ return -1;
+ }
+ if (info->endian == BFD_ENDIAN_BIG)
+ insn = bfd_getb16 (buffer);
+ else
+ insn = bfd_getl16 (buffer);
+ iprintf (is, "0x%x%04x (48-bit insn)", higher, insn);
+
+ info->insn_type = dis_noninsn;
+ return 6;
+ }
+ else if ((insn & 0x1c00) == 0x0000 || (insn & 0x1000) == 0x1000)
+ {
+ /* This is a 32-bit microMIPS instruction. */
+ higher = insn;
+
+ status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
+ if (status != 0)
+ {
+ iprintf (is, "micromips 0x%x", higher);
+ (*info->memory_error_func) (status, memaddr + 2, info);
+ return -1;
+ }
+
+ if (info->endian == BFD_ENDIAN_BIG)
+ insn = bfd_getb16 (buffer);
+ else
+ insn = bfd_getl16 (buffer);
+
+ insn = insn | (higher << 16);
+
+ length += 2;
+ }
+
+ /* FIXME: Should probably use a hash table on the major opcode here. */
+
+#define GET_OP(insn, field) \
+ (((insn) >> MICROMIPSOP_SH_##field) & MICROMIPSOP_MASK_##field)
+ opend = micromips_opcodes + bfd_micromips_num_opcodes;
+ for (op = micromips_opcodes; op < opend; op++)
+ {
+ if (op->pinfo != INSN_MACRO
+ && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
+ && (insn & op->mask) == op->match
+ && ((length == 2 && (op->mask & 0xffff0000) == 0)
+ || (length == 4 && (op->mask & 0xffff0000) != 0)))
+ {
+ const char *s;
+
+ iprintf (is, "%s", op->name);
+ if (op->args[0] != '\0')
+ iprintf (is, "\t");
+
+ for (s = op->args; *s != '\0'; s++)
+ {
+ switch (*s)
+ {
+ case ',':
+ case '(':
+ case ')':
+ iprintf (is, "%c", *s);
+ break;
+
+ case '.':
+ delta = GET_OP (insn, OFFSET10);
+ if (delta & 0x200)
+ delta |= ~0x3ff;
+ iprintf (is, "%d", delta);
+ break;
+
+ case '1':
+ iprintf (is, "0x%lx", GET_OP (insn, STYPE));
+ break;
+
+ case '<':
+ iprintf (is, "0x%lx", GET_OP (insn, SHAMT));
+ break;
+
+ case '|':
+ iprintf (is, "0x%lx", GET_OP (insn, TRAP));
+ break;
+
+ case '~':
+ delta = GET_OP (insn, OFFSET12);
+ if (delta & 0x800)
+ delta |= ~0x7ff;
+ iprintf (is, "%d", delta);
+ break;
+
+ case 'a':
+ if (strcmp (op->name, "jalx") == 0)
+ info->target = (((memaddr + 4) & ~(bfd_vma) 0x0fffffff)
+ | (GET_OP (insn, TARGET) << 2));
+ else
+ info->target = (((memaddr + 4) & ~(bfd_vma) 0x07ffffff)
+ | ((GET_OP (insn, TARGET)) << 1));
+ /* For gdb disassembler, force odd address on jalx. */
+ if (info->flavour == bfd_target_unknown_flavour
+ && strcmp (op->name, "jalx") == 0)
+ info->target |= 1;
+ (*info->print_address_func) (info->target, info);
+ break;
+
+ case 'b':
+ case 'r':
+ case 's':
+ case 'v':
+ iprintf (is, "%s", mips_gpr_names[GET_OP (insn, RS)]);
+ break;
+
+ case 'c':
+ iprintf (is, "0x%lx", GET_OP (insn, CODE));
+ break;
+
+ case 'd':
+ iprintf (is, "%s", mips_gpr_names[GET_OP (insn, RD)]);
+ break;
+
+ case 'h':
+ iprintf (is, "0x%lx", GET_OP (insn, PREFX));
+ break;
+
+ case 'i':
+ case 'u':
+ iprintf (is, "0x%lx", GET_OP (insn, IMMEDIATE));
+ break;
+
+ case 'j': /* Same as i, but sign-extended. */
+ case 'o':
+ delta = (GET_OP (insn, DELTA) ^ 0x8000) - 0x8000;
+ iprintf (is, "%d", delta);
+ break;
+
+ case 'k':
+ iprintf (is, "0x%x", GET_OP (insn, CACHE));
+ break;
+
+ case 'n':
+ {
+ int s_reg_encode;
+
+ immed = GET_OP (insn, RT);
+ s_reg_encode = immed & 0xf;
+ if (s_reg_encode != 0)
+ {
+ if (s_reg_encode == 1)
+ iprintf (is, "%s", mips_gpr_names[16]);
+ else if (s_reg_encode < 9)
+ iprintf (is, "%s-%s",
+ mips_gpr_names[16],
+ mips_gpr_names[15 + s_reg_encode]);
+ else if (s_reg_encode == 9)
+ iprintf (is, "%s-%s,%s",
+ mips_gpr_names[16],
+ mips_gpr_names[23],
+ mips_gpr_names[30]);
+ else
+ iprintf (is, "UNKNOWN");
+ }
+
+ if (immed & 0x10) /* For ra. */
+ {
+ if (s_reg_encode == 0)
+ iprintf (is, "%s", mips_gpr_names[31]);
+ else
+ iprintf (is, ",%s", mips_gpr_names[31]);
+ }
+ break;
+ }
+
+ case 'p':
+ /* Sign-extend the displacement. */
+ delta = (GET_OP (insn, DELTA) ^ 0x8000) - 0x8000;
+ info->target = (delta << 1) + memaddr + length;
+ (*info->print_address_func) (info->target, info);
+ break;
+
+ case 'q':
+ iprintf (is, "0x%lx", GET_OP (insn, CODE2));
+ break;
+
+ case 't':
+ case 'w':
+ iprintf (is, "%s", mips_gpr_names[GET_OP (insn, RT)]);
+ break;
+
+ case 'y':
+ iprintf (is, "%s", mips_gpr_names[GET_OP (insn, RS3)]);
+ break;
+
+ case 'z':
+ iprintf (is, "%s", mips_gpr_names[0]);
+ break;
+
+ case 'B':
+ iprintf (is, "0x%lx", GET_OP (insn, CODE10));
+ break;
+
+ case 'C':
+ iprintf (is, "0x%lx", GET_OP (insn, COPZ));
+ break;
+
+ case 'D':
+ iprintf (is, "%s", mips_fpr_names[GET_OP (insn, FD)]);
+ break;
+
+ case 'E':
+ /* Coprocessor register for lwcN instructions, et al.
+
+ Note that there is no load/store cp0 instructions, and
+ that FPU (cp1) instructions disassemble this field using
+ 'T' format. Therefore, until we gain understanding of
+ cp2 register names, we can simply print the register
+ numbers. */
+ iprintf (is, "$%ld", GET_OP (insn, RT));
+ break;
+
+ case 'G':
+ /* Coprocessor register for mtcN instructions, et al. Note
+ that FPU (cp1) instructions disassemble this field using
+ 'S' format. Therefore, we only need to worry about cp0,
+ cp2, and cp3.
+ The microMIPS encoding does not have a coprocessor
+ identifier field as such, so we must work out the
+ coprocessor number by looking at the opcode. */
+ switch (insn
+ & ~((MICROMIPSOP_MASK_RT << MICROMIPSOP_SH_RT)
+ | (MICROMIPSOP_MASK_RS << MICROMIPSOP_SH_RS)))
+ {
+ case 0x000000fc: /* mfc0 */
+ case 0x000002fc: /* mtc0 */
+ case 0x580000fc: /* dmfc0 */
+ case 0x580002fc: /* dmtc0 */
+ iprintf (is, "%s", mips_cp0_names[GET_OP (insn, RS)]);
+ break;
+ default:
+ iprintf (is, "$%ld", GET_OP (insn, RS));
+ break;
+ }
+ break;
+
+ case 'H':
+ iprintf (is, "%ld", GET_OP (insn, SEL));
+ break;
+
+ case 'K':
+ iprintf (is, "%s", mips_hwr_names[GET_OP (insn, RS)]);
+ break;
+
+ case 'M':
+ iprintf (is, "$fcc%ld", GET_OP (insn, CCC));
+ break;
+
+ case 'N':
+ iprintf (is,
+ (op->pinfo & (FP_D | FP_S)) != 0
+ ? "$fcc%ld" : "$cc%ld",
+ GET_OP (insn, BCC));
+ break;
+
+ case 'R':
+ iprintf (is, "%s", mips_fpr_names[GET_OP (insn, FR)]);
+ break;
+
+ case 'S':
+ case 'V':
+ iprintf (is, "%s", mips_fpr_names[GET_OP (insn, FS)]);
+ break;
+
+ case 'T':
+ iprintf (is, "%s", mips_fpr_names[GET_OP (insn, FT)]);
+ break;
+
+ case '+':
+ /* Extension character; switch for second char. */
+ s++;
+ switch (*s)
+ {
+ case 'A':
+ lsb = GET_OP (insn, EXTLSB);
+ iprintf (is, "0x%x", lsb);
+ break;
+
+ case 'B':
+ msb = GET_OP (insn, INSMSB);
+ iprintf (is, "0x%x", msb - lsb + 1);
+ break;
+
+ case 'C':
+ case 'H':
+ msbd = GET_OP (insn, EXTMSBD);
+ iprintf (is, "0x%x", msbd + 1);
+ break;
+
+ case 'D':
+ {
+ const struct mips_cp0sel_name *n;
+ unsigned int cp0reg, sel;
+
+ cp0reg = GET_OP (insn, RS);
+ sel = GET_OP (insn, SEL);
+
+ /* CP0 register including 'sel' code for mtcN
+ (et al.), to be printed textually if known.
+ If not known, print both CP0 register name and
+ sel numerically since CP0 register with sel 0 may
+ have a name unrelated to register being printed. */
+ n = lookup_mips_cp0sel_name (mips_cp0sel_names,
+ mips_cp0sel_names_len,
+ cp0reg, sel);
+ if (n != NULL)
+ iprintf (is, "%s", n->name);
+ else
+ iprintf (is, "$%d,%d", cp0reg, sel);
+ break;
+ }
+
+ case 'E':
+ lsb = GET_OP (insn, EXTLSB) + 32;
+ iprintf (is, "0x%x", lsb);
+ break;
+
+ case 'F':
+ msb = GET_OP (insn, INSMSB) + 32;
+ iprintf (is, "0x%x", msb - lsb + 1);
+ break;
+
+ case 'G':
+ msbd = GET_OP (insn, EXTMSBD) + 32;
+ iprintf (is, "0x%x", msbd + 1);
+ break;
+
+ default:
+ /* xgettext:c-format */
+ iprintf (is,
+ _("# internal disassembler error, "
+ "unrecognized modifier (+%c)"),
+ *s);
+ abort ();
+ }
+ break;
+
+ case 'm':
+ /* Extension character; switch for second char. */
+ s++;
+ switch (*s)
+ {
+ case 'a': /* global pointer. */
+ iprintf (is, "%s", mips_gpr_names[28]);
+ break;
+
+ case 'b':
+ regno = micromips_to_32_reg_b_map[GET_OP (insn, MB)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'c':
+ regno = micromips_to_32_reg_c_map[GET_OP (insn, MC)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'd':
+ regno = micromips_to_32_reg_d_map[GET_OP (insn, MD)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'e':
+ regno = micromips_to_32_reg_e_map[GET_OP (insn, ME)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'f':
+ /* Save lastregno for "mt" to print out later. */
+ lastregno = micromips_to_32_reg_f_map[GET_OP (insn, MF)];
+ iprintf (is, "%s", mips_gpr_names[lastregno]);
+ break;
+
+ case 'g':
+ regno = micromips_to_32_reg_g_map[GET_OP (insn, MG)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'h':
+ regno = micromips_to_32_reg_h_map[GET_OP (insn, MH)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'i':
+ regno = micromips_to_32_reg_i_map[GET_OP (insn, MI)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'j':
+ iprintf (is, "%s", mips_gpr_names[GET_OP (insn, MJ)]);
+ break;
+
+ case 'l':
+ regno = micromips_to_32_reg_l_map[GET_OP (insn, ML)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'm':
+ regno = micromips_to_32_reg_m_map[GET_OP (insn, MM)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'n':
+ regno = micromips_to_32_reg_n_map[GET_OP (insn, MN)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'p':
+ /* Save lastregno for "mt" to print out later. */
+ lastregno = GET_OP (insn, MP);
+ iprintf (is, "%s", mips_gpr_names[lastregno]);
+ break;
+
+ case 'q':
+ regno = micromips_to_32_reg_q_map[GET_OP (insn, MQ)];
+ iprintf (is, "%s", mips_gpr_names[regno]);
+ break;
+
+ case 'r': /* program counter. */
+ iprintf (is, "$pc");
+ break;
+
+ case 's': /* stack pointer. */
+ lastregno = 29;
+ iprintf (is, "%s", mips_gpr_names[29]);
+ break;
+
+ case 't':
+ iprintf (is, "%s", mips_gpr_names[lastregno]);
+ break;
+
+ case 'z': /* $0. */
+ iprintf (is, "%s", mips_gpr_names[0]);
+ break;
+
+ case 'A':
+ /* Sign-extend the immediate. */
+ immed = ((GET_OP (insn, IMMA) ^ 0x40) - 0x40) << 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'B':
+ immed = micromips_imm_b_map[GET_OP (insn, IMMB)];
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'C':
+ immed = micromips_imm_c_map[GET_OP (insn, IMMC)];
+ iprintf (is, "0x%lx", immed);
+ break;
+
+ case 'D':
+ /* Sign-extend the displacement. */
+ delta = (GET_OP (insn, IMMD) ^ 0x200) - 0x200;
+ info->target = (delta << 1) + memaddr + length;
+ (*info->print_address_func) (info->target, info);
+ break;
+
+ case 'E':
+ /* Sign-extend the displacement. */
+ delta = (GET_OP (insn, IMME) ^ 0x40) - 0x40;
+ info->target = (delta << 1) + memaddr + length;
+ (*info->print_address_func) (info->target, info);
+ break;
+
+ case 'F':
+ immed = GET_OP (insn, IMMF);
+ iprintf (is, "0x%x", immed);
+ break;
+
+ case 'G':
+ immed = (insn >> MICROMIPSOP_SH_IMMG) + 1;
+ immed = (immed & MICROMIPSOP_MASK_IMMG) - 1;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'H':
+ immed = GET_OP (insn, IMMH) << 1;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'I':
+ immed = (insn >> MICROMIPSOP_SH_IMMI) + 1;
+ immed = (immed & MICROMIPSOP_MASK_IMMI) - 1;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'J':
+ immed = GET_OP (insn, IMMJ) << 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'L':
+ immed = GET_OP (insn, IMML);
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'M':
+ immed = (insn >> MICROMIPSOP_SH_IMMM) - 1;
+ immed = (immed & MICROMIPSOP_MASK_IMMM) + 1;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'N':
+ immed = GET_OP (insn, IMMN);
+ if (immed == 0)
+ iprintf (is, "%s,%s",
+ mips_gpr_names[16],
+ mips_gpr_names[31]);
+ else
+ iprintf (is, "%s-%s,%s",
+ mips_gpr_names[16],
+ mips_gpr_names[16 + immed],
+ mips_gpr_names[31]);
+ break;
+
+ case 'O':
+ immed = GET_OP (insn, IMMO);
+ iprintf (is, "0x%x", immed);
+ break;
+
+ case 'P':
+ immed = GET_OP (insn, IMMP) << 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'Q':
+ /* Sign-extend the immediate. */
+ immed = (GET_OP (insn, IMMQ) ^ 0x400000) - 0x400000;
+ immed <<= 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'U':
+ immed = GET_OP (insn, IMMU) << 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'W':
+ immed = GET_OP (insn, IMMW) << 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'X':
+ /* Sign-extend the immediate. */
+ immed = (GET_OP (insn, IMMX) ^ 0x8) - 0x8;
+ iprintf (is, "%d", immed);
+ break;
+
+ case 'Y':
+ /* Sign-extend the immediate. */
+ immed = (GET_OP (insn, IMMY) ^ 0x100) - 0x100;
+ if (immed >= -2 && immed <= 1)
+ immed ^= 0x100;
+ immed = immed << 2;
+ iprintf (is, "%d", immed);
+ break;
+
+ default:
+ /* xgettext:c-format */
+ iprintf (is,
+ _("# internal disassembler error, "
+ "unrecognized modifier (m%c)"),
+ *s);
+ abort ();
+ }
+ break;
+
+ default:
+ /* xgettext:c-format */
+ iprintf (is,
+ _("# internal disassembler error, "
+ "unrecognized modifier (%c)"),
+ *s);
+ abort ();
+ }
+ }
+
+ /* Figure out instruction type and branch delay information. */
+ if ((op->pinfo
+ & (INSN_UNCOND_BRANCH_DELAY | INSN_COND_BRANCH_DELAY)) != 0)
+ info->branch_delay_insns = 1;
+ if (((op->pinfo & INSN_UNCOND_BRANCH_DELAY)
+ | (op->pinfo2 & INSN2_UNCOND_BRANCH)) != 0)
+ {
+ if ((op->pinfo & (INSN_WRITE_GPR_31 | INSN_WRITE_GPR_T)) != 0)
+ info->insn_type = dis_jsr;
+ else
+ info->insn_type = dis_branch;
+ }
+ else if (((op->pinfo & INSN_COND_BRANCH_DELAY)
+ | (op->pinfo2 & INSN2_COND_BRANCH)) != 0)
+ {
+ if ((op->pinfo & INSN_WRITE_GPR_31) != 0)
+ info->insn_type = dis_condjsr;
+ else
+ info->insn_type = dis_condbranch;
+ }
+ else if ((op->pinfo
+ & (INSN_STORE_MEMORY | INSN_LOAD_MEMORY_DELAY)) != 0)
+ info->insn_type = dis_dref;
+
+ return length;
+ }
+ }
+#undef GET_OP
+
+ iprintf (is, "0x%x", insn);
+ info->insn_type = dis_noninsn;
+
+ return length;
+}
+
+/* Return 1 if a symbol associated with the location being disassembled
+ indicates a compressed (MIPS16 or microMIPS) mode. We iterate over
+ all the symbols at the address being considered assuming if at least
+ one of them indicates code compression, then such code has been
+ genuinely produced here (other symbols could have been derived from
+ function symbols defined elsewhere or could define data). Otherwise,
+ return 0. */
+
+static bfd_boolean
+is_compressed_mode_p (struct disassemble_info *info)
+{
+ elf_symbol_type *symbol;
+ int pos;
+ int i;
+
+ for (i = 0; i < info->num_symbols; i++)
+ {
+ pos = info->symtab_pos + i;
+
+ if (bfd_asymbol_flavour (info->symtab[pos]) != bfd_target_elf_flavour)
+ continue;
+
+ symbol = (elf_symbol_type *) info->symtab[pos];
+ if ((!micromips_ase
+ && ELF_ST_IS_MIPS16 (symbol->internal_elf_sym.st_other))
+ || (micromips_ase
+ && ELF_ST_IS_MICROMIPS (symbol->internal_elf_sym.st_other)))
+ return 1;
+ }
+
+ return 0;
+}
+
/* In an environment where we do not know the symbol type of the
instruction we are forced to assume that the low order bit of the
instructions' address may mark it as a mips16 instruction. If we
struct disassemble_info *info,
enum bfd_endian endianness)
{
+ int (*print_insn_compr) (bfd_vma, struct disassemble_info *);
bfd_byte buffer[INSNLEN];
int status;
set_default_mips_dis_options (info);
parse_mips_dis_options (info->disassembler_options);
+ if (info->mach == bfd_mach_mips16)
+ return print_insn_mips16 (memaddr, info);
+ if (info->mach == bfd_mach_mips_micromips)
+ return print_insn_micromips (memaddr, info);
+
+ print_insn_compr = !micromips_ase ? print_insn_mips16 : print_insn_micromips;
+
#if 1
- /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
+ /* FIXME: If odd address, this is CLEARLY a compressed instruction. */
/* Only a few tools will work this way. */
if (memaddr & 0x01)
- return print_insn_mips16 (memaddr, info);
+ return print_insn_compr (memaddr, info);
#endif
#if SYMTAB_AVAILABLE
- if (info->mach == bfd_mach_mips16
- || (info->symbols != NULL
- && bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour
- && ELF_ST_IS_MIPS16 ((*(elf_symbol_type **) info->symbols)
- ->internal_elf_sym.st_other)))
- return print_insn_mips16 (memaddr, info);
+ if (is_compressed_mode_p (info))
+ return print_insn_compr (memaddr, info);
#endif
status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
projects / deliverable / binutils-gdb.git / blobdiff