Free Software Foundation, Inc.
Contributed by Nobuyuki Hikichi(hikichi@sra.co.jp).
-This file is part of GDB, GAS, and the GNU binutils.
+ This file is part of GDB, GAS, and the GNU binutils.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
#include "sysdep.h"
#include "dis-asm.h"
/* Mips instructions are at maximum this many bytes long. */
#define INSNLEN 4
-static void set_default_mips_dis_options
- PARAMS ((struct disassemble_info *));
-static void parse_mips_dis_option
- PARAMS ((const char *, unsigned int));
-static void parse_mips_dis_options
- PARAMS ((const char *));
-static int _print_insn_mips
- PARAMS ((bfd_vma, struct disassemble_info *, enum bfd_endian));
-static int print_insn_mips
- PARAMS ((bfd_vma, unsigned long int, struct disassemble_info *));
-static void print_insn_args
- PARAMS ((const char *, unsigned long, bfd_vma, struct disassemble_info *));
-static int print_insn_mips16
- PARAMS ((bfd_vma, struct disassemble_info *));
-static int is_newabi
- PARAMS ((Elf_Internal_Ehdr *));
-static void print_mips16_insn_arg
- PARAMS ((int, const struct mips_opcode *, int, bfd_boolean, int, bfd_vma,
- struct disassemble_info *));
\f
/* FIXME: These should be shared with gdb somehow. */
-struct mips_cp0sel_name {
- unsigned int cp0reg;
- unsigned int sel;
- const char * const name;
+struct mips_cp0sel_name
+{
+ unsigned int cp0reg;
+ unsigned int sel;
+ const char * const name;
};
/* The mips16 register names. */
-static const char * const mips16_reg_names[] = {
+static const char * const mips16_reg_names[] =
+{
"s0", "s1", "v0", "v1", "a0", "a1", "a2", "a3"
};
-static const char * const mips_gpr_names_numeric[32] = {
+static const char * const mips_gpr_names_numeric[32] =
+{
"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
"$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
"$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
};
-static const char * const mips_gpr_names_oldabi[32] = {
+static const char * const mips_gpr_names_oldabi[32] =
+{
"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
};
-static const char * const mips_gpr_names_newabi[32] = {
+static const char * const mips_gpr_names_newabi[32] =
+{
"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
};
-static const char * const mips_fpr_names_numeric[32] = {
+static const char * const mips_fpr_names_numeric[32] =
+{
"$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
"$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
"$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
"$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"
};
-static const char * const mips_fpr_names_32[32] = {
+static const char * const mips_fpr_names_32[32] =
+{
"fv0", "fv0f", "fv1", "fv1f", "ft0", "ft0f", "ft1", "ft1f",
"ft2", "ft2f", "ft3", "ft3f", "fa0", "fa0f", "fa1", "fa1f",
"ft4", "ft4f", "ft5", "ft5f", "fs0", "fs0f", "fs1", "fs1f",
"fs2", "fs2f", "fs3", "fs3f", "fs4", "fs4f", "fs5", "fs5f"
};
-static const char * const mips_fpr_names_n32[32] = {
+static const char * const mips_fpr_names_n32[32] =
+{
"fv0", "ft14", "fv1", "ft15", "ft0", "ft1", "ft2", "ft3",
"ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
"fa4", "fa5", "fa6", "fa7", "fs0", "ft8", "fs1", "ft9",
"fs2", "ft10", "fs3", "ft11", "fs4", "ft12", "fs5", "ft13"
};
-static const char * const mips_fpr_names_64[32] = {
+static const char * const mips_fpr_names_64[32] =
+{
"fv0", "ft12", "fv1", "ft13", "ft0", "ft1", "ft2", "ft3",
"ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
"fa4", "fa5", "fa6", "fa7", "ft8", "ft9", "ft10", "ft11",
"fs0", "fs1", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7"
};
-static const char * const mips_cp0_names_numeric[32] = {
+static const char * const mips_cp0_names_numeric[32] =
+{
"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
"$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
"$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
};
-static const char * const mips_cp0_names_mips3264[32] = {
+static const char * const mips_cp0_names_mips3264[32] =
+{
"c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
"c0_context", "c0_pagemask", "c0_wired", "$7",
"c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
"c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
};
-static const struct mips_cp0sel_name mips_cp0sel_names_mips3264[] = {
+static const struct mips_cp0sel_name mips_cp0sel_names_mips3264[] =
+{
{ 16, 1, "c0_config1" },
{ 16, 2, "c0_config2" },
{ 16, 3, "c0_config3" },
{ 29, 1, "c0_datahi" }
};
-static const char * const mips_cp0_names_mips3264r2[32] = {
+static const char * const mips_cp0_names_mips3264r2[32] =
+{
"c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
"c0_context", "c0_pagemask", "c0_wired", "c0_hwrena",
"c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
"c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
};
-static const struct mips_cp0sel_name mips_cp0sel_names_mips3264r2[] = {
+static const struct mips_cp0sel_name mips_cp0sel_names_mips3264r2[] =
+{
{ 4, 1, "c0_contextconfig" },
{ 5, 1, "c0_pagegrain" },
{ 12, 1, "c0_intctl" },
};
/* SB-1: MIPS64 (mips_cp0_names_mips3264) with minor mods. */
-static const char * const mips_cp0_names_sb1[32] = {
+static const char * const mips_cp0_names_sb1[32] =
+{
"c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
"c0_context", "c0_pagemask", "c0_wired", "$7",
"c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
"c0_taglo_i", "c0_taghi_i", "c0_errorepc", "c0_desave",
};
-static const struct mips_cp0sel_name mips_cp0sel_names_sb1[] = {
+static const struct mips_cp0sel_name mips_cp0sel_names_sb1[] =
+{
{ 16, 1, "c0_config1" },
{ 18, 1, "c0_watchlo,1" },
{ 19, 1, "c0_watchhi,1" },
{ 29, 3, "c0_datahi_d" },
};
-static const char * const mips_hwr_names_numeric[32] = {
+static const char * const mips_hwr_names_numeric[32] =
+{
"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
"$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
"$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
"$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
};
-static const char * const mips_hwr_names_mips3264r2[32] = {
+static const char * const mips_hwr_names_mips3264r2[32] =
+{
"hwr_cpunum", "hwr_synci_step", "hwr_cc", "hwr_ccres",
"$4", "$5", "$6", "$7",
"$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
"$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
};
-struct mips_abi_choice {
- const char *name;
+struct mips_abi_choice
+{
+ const char * name;
const char * const *gpr_names;
const char * const *fpr_names;
};
-struct mips_abi_choice mips_abi_choices[] = {
+struct mips_abi_choice mips_abi_choices[] =
+{
{ "numeric", mips_gpr_names_numeric, mips_fpr_names_numeric },
{ "32", mips_gpr_names_oldabi, mips_fpr_names_32 },
{ "n32", mips_gpr_names_newabi, mips_fpr_names_n32 },
{ "64", mips_gpr_names_newabi, mips_fpr_names_64 },
};
-struct mips_arch_choice {
+struct mips_arch_choice
+{
const char *name;
int bfd_mach_valid;
unsigned long bfd_mach;
const char * const *hwr_names;
};
-const struct mips_arch_choice mips_arch_choices[] = {
+const struct mips_arch_choice mips_arch_choices[] =
+{
{ "numeric", 0, 0, 0, 0,
mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
static const char * const *mips_hwr_names;
/* Other options */
-static int no_aliases; /* If set disassemble as most general inst. */
-
-static const struct mips_abi_choice *choose_abi_by_name
- PARAMS ((const char *, unsigned int));
-static const struct mips_arch_choice *choose_arch_by_name
- PARAMS ((const char *, unsigned int));
-static const struct mips_arch_choice *choose_arch_by_number
- PARAMS ((unsigned long));
-static const struct mips_cp0sel_name *lookup_mips_cp0sel_name
- PARAMS ((const struct mips_cp0sel_name *, unsigned int, unsigned int,
- unsigned int));
+static int no_aliases; /* If set disassemble as most general inst. */
\f
static const struct mips_abi_choice *
-choose_abi_by_name (name, namelen)
- const char *name;
- unsigned int namelen;
+choose_abi_by_name (const char *name, unsigned int namelen)
{
const struct mips_abi_choice *c;
unsigned int i;
for (i = 0, c = NULL; i < ARRAY_SIZE (mips_abi_choices) && c == NULL; i++)
- {
- if (strncmp (mips_abi_choices[i].name, name, namelen) == 0
- && strlen (mips_abi_choices[i].name) == namelen)
- c = &mips_abi_choices[i];
- }
+ if (strncmp (mips_abi_choices[i].name, name, namelen) == 0
+ && strlen (mips_abi_choices[i].name) == namelen)
+ c = &mips_abi_choices[i];
+
return c;
}
static const struct mips_arch_choice *
-choose_arch_by_name (name, namelen)
- const char *name;
- unsigned int namelen;
+choose_arch_by_name (const char *name, unsigned int namelen)
{
const struct mips_arch_choice *c = NULL;
unsigned int i;
for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
- {
- if (strncmp (mips_arch_choices[i].name, name, namelen) == 0
- && strlen (mips_arch_choices[i].name) == namelen)
- c = &mips_arch_choices[i];
- }
+ if (strncmp (mips_arch_choices[i].name, name, namelen) == 0
+ && strlen (mips_arch_choices[i].name) == namelen)
+ c = &mips_arch_choices[i];
+
return c;
}
static const struct mips_arch_choice *
-choose_arch_by_number (mach)
- unsigned long mach;
+choose_arch_by_number (unsigned long mach)
{
static unsigned long hint_bfd_mach;
static const struct mips_arch_choice *hint_arch_choice;
return c;
}
-void
-set_default_mips_dis_options (info)
- struct disassemble_info *info;
+/* Check if the object uses NewABI conventions. */
+
+static int
+is_newabi (Elf_Internal_Ehdr *header)
+{
+ /* There are no old-style ABIs which use 64-bit ELF. */
+ if (header->e_ident[EI_CLASS] == ELFCLASS64)
+ return 1;
+
+ /* If a 32-bit ELF file, n32 is a new-style ABI. */
+ if ((header->e_flags & EF_MIPS_ABI2) != 0)
+ return 1;
+
+ return 0;
+}
+
+static void
+set_default_mips_dis_options (struct disassemble_info *info)
{
const struct mips_arch_choice *chosen_arch;
#endif
}
-void
-parse_mips_dis_option (option, len)
- const char *option;
- unsigned int len;
+static void
+parse_mips_dis_option (const char *option, unsigned int len)
{
unsigned int i, optionlen, vallen;
const char *val;
/* Look for the = that delimits the end of the option name. */
for (i = 0; i < len; i++)
- {
- if (option[i] == '=')
- break;
- }
+ if (option[i] == '=')
+ break;
+
if (i == 0) /* Invalid option: no name before '='. */
return;
if (i == len) /* Invalid option: no '='. */
val = option + (optionlen + 1);
vallen = len - (optionlen + 1);
- if (strncmp("gpr-names", option, optionlen) == 0
- && strlen("gpr-names") == optionlen)
+ if (strncmp ("gpr-names", option, optionlen) == 0
+ && strlen ("gpr-names") == optionlen)
{
chosen_abi = choose_abi_by_name (val, vallen);
if (chosen_abi != NULL)
return;
}
- if (strncmp("fpr-names", option, optionlen) == 0
- && strlen("fpr-names") == optionlen)
+ if (strncmp ("fpr-names", option, optionlen) == 0
+ && strlen ("fpr-names") == optionlen)
{
chosen_abi = choose_abi_by_name (val, vallen);
if (chosen_abi != NULL)
return;
}
- if (strncmp("cp0-names", option, optionlen) == 0
- && strlen("cp0-names") == optionlen)
+ if (strncmp ("cp0-names", option, optionlen) == 0
+ && strlen ("cp0-names") == optionlen)
{
chosen_arch = choose_arch_by_name (val, vallen);
if (chosen_arch != NULL)
return;
}
- if (strncmp("hwr-names", option, optionlen) == 0
- && strlen("hwr-names") == optionlen)
+ if (strncmp ("hwr-names", option, optionlen) == 0
+ && strlen ("hwr-names") == optionlen)
{
chosen_arch = choose_arch_by_name (val, vallen);
if (chosen_arch != NULL)
return;
}
- if (strncmp("reg-names", option, optionlen) == 0
- && strlen("reg-names") == optionlen)
+ if (strncmp ("reg-names", option, optionlen) == 0
+ && strlen ("reg-names") == optionlen)
{
/* We check both ABI and ARCH here unconditionally, so
that "numeric" will do the desirable thing: select
/* Invalid option. */
}
-void
-parse_mips_dis_options (options)
- const char *options;
+static void
+parse_mips_dis_options (const char *options)
{
const char *option_end;
}
static const struct mips_cp0sel_name *
-lookup_mips_cp0sel_name(names, len, cp0reg, sel)
- const struct mips_cp0sel_name *names;
- unsigned int len, cp0reg, sel;
+lookup_mips_cp0sel_name (const struct mips_cp0sel_name *names,
+ unsigned int len,
+ unsigned int cp0reg,
+ unsigned int sel)
{
unsigned int i;
/* Print insn arguments for 32/64-bit code. */
static void
-print_insn_args (d, l, pc, info)
- const char *d;
- register unsigned long int l;
- bfd_vma pc;
- struct disassemble_info *info;
+print_insn_args (const char *d,
+ register unsigned long int l,
+ bfd_vma pc,
+ struct disassemble_info *info)
{
int op, delta;
unsigned int lsb, msb, msbd;
case 'Q':
{
unsigned int vsel = (l >> OP_SH_VSEL) & OP_MASK_VSEL;
+
if ((vsel & 0x10) == 0)
{
int fmt;
+
vsel &= 0x0f;
for (fmt = 0; fmt < 3; fmt++, vsel >>= 1)
if ((vsel & 1) == 0)
}
}
\f
-/* Check if the object uses NewABI conventions. */
-
-static int
-is_newabi (header)
- Elf_Internal_Ehdr *header;
-{
- /* There are no old-style ABIs which use 64-bit ELF. */
- if (header->e_ident[EI_CLASS] == ELFCLASS64)
- return 1;
-
- /* If a 32-bit ELF file, n32 is a new-style ABI. */
- if ((header->e_flags & EF_MIPS_ABI2) != 0)
- return 1;
-
- return 0;
-}
-\f
/* Print the mips instruction at address MEMADDR in debugged memory,
on using INFO. Returns length of the instruction, in bytes, which is
always INSNLEN. BIGENDIAN must be 1 if this is big-endian code, 0 if
this is little-endian code. */
static int
-print_insn_mips (memaddr, word, info)
- bfd_vma memaddr;
- unsigned long int word;
- struct disassemble_info *info;
+print_insn_mips (bfd_vma memaddr,
+ unsigned long int word,
+ struct disassemble_info *info)
{
- register const struct mips_opcode *op;
+ const struct mips_opcode *op;
static bfd_boolean init = 0;
static const struct mips_opcode *mips_hash[OP_MASK_OP + 1];
&& !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
&& (word & op->mask) == op->match)
{
- register const char *d;
+ const char *d;
/* We always allow to disassemble the jalx instruction. */
if (! OPCODE_IS_MEMBER (op, mips_isa, mips_processor)
return INSNLEN;
}
\f
-/* 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
- are single stepping, or the pc is within the disassembled function,
- this works. Otherwise, we need a clue. Sometimes. */
-
-static int
-_print_insn_mips (memaddr, info, endianness)
- bfd_vma memaddr;
- struct disassemble_info *info;
- enum bfd_endian endianness;
-{
- bfd_byte buffer[INSNLEN];
- int status;
-
- set_default_mips_dis_options (info);
- parse_mips_dis_options (info->disassembler_options);
-
-#if 1
- /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
- /* Only a few tools will work this way. */
- if (memaddr & 0x01)
- return print_insn_mips16 (memaddr, info);
-#endif
-
-#if SYMTAB_AVAILABLE
- if (info->mach == bfd_mach_mips16
- || (info->flavour == bfd_target_elf_flavour
- && info->symbols != NULL
- && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other
- == STO_MIPS16)))
- return print_insn_mips16 (memaddr, info);
-#endif
-
- status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
- if (status == 0)
- {
- unsigned long insn;
-
- if (endianness == BFD_ENDIAN_BIG)
- insn = (unsigned long) bfd_getb32 (buffer);
- else
- insn = (unsigned long) bfd_getl32 (buffer);
-
- return print_insn_mips (memaddr, insn, info);
- }
- else
- {
- (*info->memory_error_func) (status, memaddr, info);
- return -1;
- }
-}
-
-int
-print_insn_big_mips (memaddr, info)
- bfd_vma memaddr;
- struct disassemble_info *info;
-{
- return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
-}
-
-int
-print_insn_little_mips (memaddr, info)
- bfd_vma memaddr;
- struct disassemble_info *info;
-{
- return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
-}
-\f
-/* Disassemble mips16 instructions. */
-
-static int
-print_insn_mips16 (memaddr, info)
- bfd_vma memaddr;
- struct disassemble_info *info;
-{
- int status;
- bfd_byte buffer[2];
- int length;
- int insn;
- bfd_boolean use_extend;
- int extend = 0;
- const struct mips_opcode *op, *opend;
-
- 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);
-
- /* Handle the extend opcode specially. */
- use_extend = FALSE;
- if ((insn & 0xf800) == 0xf000)
- {
- use_extend = TRUE;
- extend = insn & 0x7ff;
-
- memaddr += 2;
-
- status = (*info->read_memory_func) (memaddr, buffer, 2, info);
- if (status != 0)
- {
- (*info->fprintf_func) (info->stream, "extend 0x%x",
- (unsigned int) extend);
- (*info->memory_error_func) (status, memaddr, info);
- return -1;
- }
-
- if (info->endian == BFD_ENDIAN_BIG)
- insn = bfd_getb16 (buffer);
- else
- insn = bfd_getl16 (buffer);
-
- /* Check for an extend opcode followed by an extend opcode. */
- if ((insn & 0xf800) == 0xf000)
- {
- (*info->fprintf_func) (info->stream, "extend 0x%x",
- (unsigned int) extend);
- info->insn_type = dis_noninsn;
- return length;
- }
-
- length += 2;
- }
-
- /* FIXME: Should probably use a hash table on the major opcode here. */
-
- opend = mips16_opcodes + bfd_mips16_num_opcodes;
- for (op = mips16_opcodes; op < opend; op++)
- {
- if (op->pinfo != INSN_MACRO
- && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
- && (insn & op->mask) == op->match)
- {
- const char *s;
-
- if (strchr (op->args, 'a') != NULL)
- {
- if (use_extend)
- {
- (*info->fprintf_func) (info->stream, "extend 0x%x",
- (unsigned int) extend);
- info->insn_type = dis_noninsn;
- return length - 2;
- }
-
- use_extend = FALSE;
-
- memaddr += 2;
-
- status = (*info->read_memory_func) (memaddr, buffer, 2,
- info);
- if (status == 0)
- {
- use_extend = TRUE;
- if (info->endian == BFD_ENDIAN_BIG)
- extend = bfd_getb16 (buffer);
- else
- extend = bfd_getl16 (buffer);
- length += 2;
- }
- }
-
- (*info->fprintf_func) (info->stream, "%s", op->name);
- if (op->args[0] != '\0')
- (*info->fprintf_func) (info->stream, "\t");
-
- for (s = op->args; *s != '\0'; s++)
- {
- if (*s == ','
- && s[1] == 'w'
- && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)
- == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY)))
- {
- /* Skip the register and the comma. */
- ++s;
- continue;
- }
- if (*s == ','
- && s[1] == 'v'
- && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ)
- == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)))
- {
- /* Skip the register and the comma. */
- ++s;
- continue;
- }
- print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
- info);
- }
-
- if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
- {
- info->branch_delay_insns = 1;
- if (info->insn_type != dis_jsr)
- info->insn_type = dis_branch;
- }
-
- return length;
- }
- }
-
- if (use_extend)
- (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000);
- (*info->fprintf_func) (info->stream, "0x%x", insn);
- info->insn_type = dis_noninsn;
-
- return length;
-}
-
/* Disassemble an operand for a mips16 instruction. */
static void
-print_mips16_insn_arg (type, op, l, use_extend, extend, memaddr, info)
- char type;
- const struct mips_opcode *op;
- int l;
- bfd_boolean use_extend;
- int extend;
- bfd_vma memaddr;
- struct disassemble_info *info;
+print_mips16_insn_arg (char type,
+ const struct mips_opcode *op,
+ int l,
+ bfd_boolean use_extend,
+ int extend,
+ bfd_vma memaddr,
+ struct disassemble_info *info)
{
switch (type)
{
}
}
+/* Disassemble mips16 instructions. */
+
+static int
+print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
+{
+ int status;
+ bfd_byte buffer[2];
+ int length;
+ int insn;
+ bfd_boolean use_extend;
+ int extend = 0;
+ const struct mips_opcode *op, *opend;
+
+ 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);
+
+ /* Handle the extend opcode specially. */
+ use_extend = FALSE;
+ if ((insn & 0xf800) == 0xf000)
+ {
+ use_extend = TRUE;
+ extend = insn & 0x7ff;
+
+ memaddr += 2;
+
+ status = (*info->read_memory_func) (memaddr, buffer, 2, info);
+ if (status != 0)
+ {
+ (*info->fprintf_func) (info->stream, "extend 0x%x",
+ (unsigned int) extend);
+ (*info->memory_error_func) (status, memaddr, info);
+ return -1;
+ }
+
+ if (info->endian == BFD_ENDIAN_BIG)
+ insn = bfd_getb16 (buffer);
+ else
+ insn = bfd_getl16 (buffer);
+
+ /* Check for an extend opcode followed by an extend opcode. */
+ if ((insn & 0xf800) == 0xf000)
+ {
+ (*info->fprintf_func) (info->stream, "extend 0x%x",
+ (unsigned int) extend);
+ info->insn_type = dis_noninsn;
+ return length;
+ }
+
+ length += 2;
+ }
+
+ /* FIXME: Should probably use a hash table on the major opcode here. */
+
+ opend = mips16_opcodes + bfd_mips16_num_opcodes;
+ for (op = mips16_opcodes; op < opend; op++)
+ {
+ if (op->pinfo != INSN_MACRO
+ && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
+ && (insn & op->mask) == op->match)
+ {
+ const char *s;
+
+ if (strchr (op->args, 'a') != NULL)
+ {
+ if (use_extend)
+ {
+ (*info->fprintf_func) (info->stream, "extend 0x%x",
+ (unsigned int) extend);
+ info->insn_type = dis_noninsn;
+ return length - 2;
+ }
+
+ use_extend = FALSE;
+
+ memaddr += 2;
+
+ status = (*info->read_memory_func) (memaddr, buffer, 2,
+ info);
+ if (status == 0)
+ {
+ use_extend = TRUE;
+ if (info->endian == BFD_ENDIAN_BIG)
+ extend = bfd_getb16 (buffer);
+ else
+ extend = bfd_getl16 (buffer);
+ length += 2;
+ }
+ }
+
+ (*info->fprintf_func) (info->stream, "%s", op->name);
+ if (op->args[0] != '\0')
+ (*info->fprintf_func) (info->stream, "\t");
+
+ for (s = op->args; *s != '\0'; s++)
+ {
+ if (*s == ','
+ && s[1] == 'w'
+ && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)
+ == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY)))
+ {
+ /* Skip the register and the comma. */
+ ++s;
+ continue;
+ }
+ if (*s == ','
+ && s[1] == 'v'
+ && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ)
+ == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)))
+ {
+ /* Skip the register and the comma. */
+ ++s;
+ continue;
+ }
+ print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
+ info);
+ }
+
+ if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
+ {
+ info->branch_delay_insns = 1;
+ if (info->insn_type != dis_jsr)
+ info->insn_type = dis_branch;
+ }
+
+ return length;
+ }
+ }
+
+ if (use_extend)
+ (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000);
+ (*info->fprintf_func) (info->stream, "0x%x", insn);
+ info->insn_type = dis_noninsn;
+
+ return length;
+}
+
+/* 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
+ are single stepping, or the pc is within the disassembled function,
+ this works. Otherwise, we need a clue. Sometimes. */
+
+static int
+_print_insn_mips (bfd_vma memaddr,
+ struct disassemble_info *info,
+ enum bfd_endian endianness)
+{
+ bfd_byte buffer[INSNLEN];
+ int status;
+
+ set_default_mips_dis_options (info);
+ parse_mips_dis_options (info->disassembler_options);
+
+#if 1
+ /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
+ /* Only a few tools will work this way. */
+ if (memaddr & 0x01)
+ return print_insn_mips16 (memaddr, info);
+#endif
+
+#if SYMTAB_AVAILABLE
+ if (info->mach == bfd_mach_mips16
+ || (info->flavour == bfd_target_elf_flavour
+ && info->symbols != NULL
+ && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other
+ == STO_MIPS16)))
+ return print_insn_mips16 (memaddr, info);
+#endif
+
+ status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
+ if (status == 0)
+ {
+ unsigned long insn;
+
+ if (endianness == BFD_ENDIAN_BIG)
+ insn = (unsigned long) bfd_getb32 (buffer);
+ else
+ insn = (unsigned long) bfd_getl32 (buffer);
+
+ return print_insn_mips (memaddr, insn, info);
+ }
+ else
+ {
+ (*info->memory_error_func) (status, memaddr, info);
+ return -1;
+ }
+}
+
+int
+print_insn_big_mips (bfd_vma memaddr, struct disassemble_info *info)
+{
+ return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
+}
+
+int
+print_insn_little_mips (bfd_vma memaddr, struct disassemble_info *info)
+{
+ return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
+}
+\f
void
-print_mips_disassembler_options (stream)
- FILE *stream;
+print_mips_disassembler_options (FILE *stream)
{
unsigned int i;
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