/* Instruction printing code for the ARC.
- Copyright (C) 1994-2016 Free Software Foundation, Inc.
+ Copyright (C) 1994-2017 Free Software Foundation, Inc.
Contributed by Claudiu Zissulescu (claziss@synopsys.com)
#include <assert.h>
#include "dis-asm.h"
#include "opcode/arc.h"
+#include "elf/arc.h"
#include "arc-dis.h"
#include "arc-ext.h"
+#include "elf-bfd.h"
+#include "libiberty.h"
+#include "opintl.h"
/* Structure used to iterate over, and extract the values for, operands of
an opcode. */
struct arc_operand_iterator
{
- enum
- {
- OPERAND_ITERATOR_STANDARD,
- OPERAND_ITERATOR_LONG
- } mode;
-
- /* The array of 32-bit values that make up this instruction. All
- required values have been pre-loaded into this array during the
- find_format call. */
- unsigned *insn;
-
- union
- {
- struct
- {
- /* The opcode this iterator is operating on. */
- const struct arc_opcode *opcode;
+ /* The complete instruction value to extract operands from. */
+ unsigned long long insn;
- /* The index into the opcodes operand index list. */
- const unsigned char *opidx;
- } standard;
+ /* The LIMM if this is being tracked separately. This field is only
+ valid if we find the LIMM operand in the operand list. */
+ unsigned limm;
- struct
- {
- /* The long instruction opcode this iterator is operating on. */
- const struct arc_long_opcode *long_opcode;
+ /* The opcode this iterator is operating on. */
+ const struct arc_opcode *opcode;
- /* Two indexes into the opcodes operand index lists. */
- const unsigned char *opidx_base, *opidx_limm;
- } long_insn;
- } state;
+ /* The index into the opcodes operand index list. */
+ const unsigned char *opidx;
};
/* Globals variables. */
"r56", "r57", "ACCL", "ACCH", "lp_count", "rezerved", "LIMM", "pcl"
};
+static const char * const addrtypenames[ARC_NUM_ADDRTYPES] =
+{
+ "bd", "jid", "lbd", "mbd", "sd", "sm", "xa", "xd",
+ "cd", "cbd", "cjid", "clbd", "cm", "csd", "cxa", "cxd"
+};
+
+static int addrtypenames_max = ARC_NUM_ADDRTYPES - 1;
+
+static const char * const addrtypeunknown = "unknown";
+
+/* This structure keeps track which instruction class(es)
+ should be ignored durring disassembling. */
+
+typedef struct skipclass
+{
+ insn_class_t insn_class;
+ insn_subclass_t subclass;
+ struct skipclass *nxt;
+} skipclass_t, *linkclass;
+
+/* Intial classes of instructions to be consider first when
+ disassembling. */
+static linkclass decodelist = NULL;
+
/* Macros section. */
#ifdef DEBUG
#define BITS(word,s,e) (((word) << (sizeof (word) * 8 - 1 - e)) >> \
(s + (sizeof (word) * 8 - 1 - e)))
-#define OPCODE(word) (BITS ((word), 27, 31))
-
-#define OPCODE_AC(word) (BITS ((word), 11, 15))
+#define OPCODE_32BIT_INSN(word) (BITS ((word), 27, 31))
/* Functions implementation. */
+/* Add a new element to the decode list. */
+
+static void
+add_to_decodelist (insn_class_t insn_class,
+ insn_subclass_t subclass)
+{
+ linkclass t = (linkclass) xmalloc (sizeof (skipclass_t));
+
+ t->insn_class = insn_class;
+ t->subclass = subclass;
+ t->nxt = decodelist;
+ decodelist = t;
+}
+
+/* Return TRUE if we need to skip the opcode from being
+ disassembled. */
+
+static bfd_boolean
+skip_this_opcode (const struct arc_opcode *opcode)
+{
+ linkclass t = decodelist;
+
+ /* Check opcode for major 0x06, return if it is not in. */
+ if (arc_opcode_len (opcode) == 4
+ && OPCODE_32BIT_INSN (opcode->opcode) != 0x06)
+ return FALSE;
+
+ /* or not a known truble class. */
+ switch (opcode->insn_class)
+ {
+ case FLOAT:
+ case DSP:
+ break;
+ default:
+ return FALSE;
+ }
+
+ while (t != NULL)
+ {
+ if ((t->insn_class == opcode->insn_class)
+ && (t->subclass == opcode->subclass))
+ return FALSE;
+ t = t->nxt;
+ }
+
+ return TRUE;
+}
+
static bfd_vma
bfd_getm32 (unsigned int data)
{
return value;
}
-static int
+static bfd_boolean
special_flag_p (const char *opname,
const char *flgname)
{
break; /* End of the array. */
if (strcmp (flgname, arc_flag_operands[flgidx].name) == 0)
- return 1;
+ return TRUE;
}
}
- return 0;
+ return FALSE;
}
/* Find opcode from ARC_TABLE given the instruction described by INSN and
INSNLEN. The ISA_MASK restricts the possible matches in ARC_TABLE. */
static const struct arc_opcode *
-find_format_from_table (const struct arc_opcode *arc_table,
- unsigned *insn, unsigned int insn_len,
- unsigned isa_mask, bfd_boolean *has_limm)
+find_format_from_table (struct disassemble_info *info,
+ const struct arc_opcode *arc_table,
+ unsigned long long insn,
+ unsigned int insn_len,
+ unsigned isa_mask,
+ bfd_boolean *has_limm,
+ bfd_boolean overlaps)
{
unsigned int i = 0;
const struct arc_opcode *opcode = NULL;
+ const struct arc_opcode *t_op = NULL;
const unsigned char *opidx;
const unsigned char *flgidx;
+ bfd_boolean warn_p = FALSE;
- do {
- bfd_boolean invalid = FALSE;
+ do
+ {
+ bfd_boolean invalid = FALSE;
- opcode = &arc_table[i++];
+ opcode = &arc_table[i++];
- if (ARC_SHORT (opcode->mask) && (insn_len == 2))
- {
- if (OPCODE_AC (opcode->opcode) != OPCODE_AC (insn[0]))
- continue;
- }
- else if (!ARC_SHORT (opcode->mask) && (insn_len == 4))
- {
- if (OPCODE (opcode->opcode) != OPCODE (insn[0]))
- continue;
- }
- else
- continue;
+ if (!(opcode->cpu & isa_mask))
+ continue;
- if ((insn[0] ^ opcode->opcode) & opcode->mask)
- continue;
+ if (arc_opcode_len (opcode) != (int) insn_len)
+ continue;
- if (!(opcode->cpu & isa_mask))
- continue;
+ if ((insn & opcode->mask) != opcode->opcode)
+ continue;
- *has_limm = FALSE;
+ *has_limm = FALSE;
- /* Possible candidate, check the operands. */
- for (opidx = opcode->operands; *opidx; opidx++)
- {
- int value;
- const struct arc_operand *operand = &arc_operands[*opidx];
+ /* Possible candidate, check the operands. */
+ for (opidx = opcode->operands; *opidx; opidx++)
+ {
+ int value, limmind;
+ const struct arc_operand *operand = &arc_operands[*opidx];
- if (operand->flags & ARC_OPERAND_FAKE)
- continue;
+ if (operand->flags & ARC_OPERAND_FAKE)
+ continue;
- if (operand->extract)
- value = (*operand->extract) (insn[0], &invalid);
- else
- value = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1);
+ if (operand->extract)
+ value = (*operand->extract) (insn, &invalid);
+ else
+ value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
- /* Check for LIMM indicator. If it is there, then make sure
- we pick the right format. */
- if (operand->flags & ARC_OPERAND_IR
- && !(operand->flags & ARC_OPERAND_LIMM))
- {
- if ((value == 0x3E && insn_len == 4)
- || (value == 0x1E && insn_len == 2))
- {
- invalid = TRUE;
- break;
- }
- }
+ /* Check for LIMM indicator. If it is there, then make sure
+ we pick the right format. */
+ limmind = (isa_mask & ARC_OPCODE_ARCV2) ? 0x1E : 0x3E;
+ if (operand->flags & ARC_OPERAND_IR
+ && !(operand->flags & ARC_OPERAND_LIMM))
+ {
+ if ((value == 0x3E && insn_len == 4)
+ || (value == limmind && insn_len == 2))
+ {
+ invalid = TRUE;
+ break;
+ }
+ }
- if (operand->flags & ARC_OPERAND_LIMM
- && !(operand->flags & ARC_OPERAND_DUPLICATE))
- *has_limm = TRUE;
- }
+ if (operand->flags & ARC_OPERAND_LIMM
+ && !(operand->flags & ARC_OPERAND_DUPLICATE))
+ *has_limm = TRUE;
+ }
- /* Check the flags. */
- for (flgidx = opcode->flags; *flgidx; flgidx++)
- {
- /* Get a valid flag class. */
- const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
- const unsigned *flgopridx;
- int foundA = 0, foundB = 0;
- unsigned int value;
-
- /* Check first the extensions. */
- if (cl_flags->flag_class & F_CLASS_EXTEND)
- {
- value = (insn[0] & 0x1F);
- if (arcExtMap_condCodeName (value))
- continue;
- }
- for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
- {
- const struct arc_flag_operand *flg_operand =
- &arc_flag_operands[*flgopridx];
-
- value = (insn[0] >> flg_operand->shift)
- & ((1 << flg_operand->bits) - 1);
- if (value == flg_operand->code)
- foundA = 1;
- if (value)
- foundB = 1;
- }
- if (!foundA && foundB)
- {
- invalid = TRUE;
- break;
- }
- }
+ /* Check the flags. */
+ for (flgidx = opcode->flags; *flgidx; flgidx++)
+ {
+ /* Get a valid flag class. */
+ const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
+ const unsigned *flgopridx;
+ int foundA = 0, foundB = 0;
+ unsigned int value;
+
+ /* Check first the extensions. */
+ if (cl_flags->flag_class & F_CLASS_EXTEND)
+ {
+ value = (insn & 0x1F);
+ if (arcExtMap_condCodeName (value))
+ continue;
+ }
- if (invalid)
- continue;
+ for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
+ {
+ const struct arc_flag_operand *flg_operand =
+ &arc_flag_operands[*flgopridx];
+
+ value = (insn >> flg_operand->shift)
+ & ((1 << flg_operand->bits) - 1);
+ if (value == flg_operand->code)
+ foundA = 1;
+ if (value)
+ foundB = 1;
+ }
- /* The instruction is valid. */
- return opcode;
- } while (opcode->mask);
+ if (!foundA && foundB)
+ {
+ invalid = TRUE;
+ break;
+ }
+ }
- return NULL;
-}
+ if (invalid)
+ continue;
-/* Find long instructions matching values in INSN array. */
+ if (insn_len == 4
+ && overlaps)
+ {
+ warn_p = TRUE;
+ t_op = opcode;
+ if (skip_this_opcode (opcode))
+ continue;
+ }
-static const struct arc_long_opcode *
-find_format_long_instructions (unsigned *insn,
- unsigned int *insn_len,
- unsigned isa_mask,
- bfd_vma memaddr,
- struct disassemble_info *info)
-{
- unsigned int i;
- unsigned limm = 0;
- bfd_boolean limm_loaded = FALSE;
+ /* The instruction is valid. */
+ return opcode;
+ }
+ while (opcode->mask);
- for (i = 0; i < arc_num_long_opcodes; ++i)
+ if (warn_p)
{
- bfd_byte buffer[4];
- int status;
- const struct arc_opcode *opcode;
-
- opcode = &arc_long_opcodes[i].base_opcode;
-
- if (ARC_SHORT (opcode->mask) && (*insn_len == 2))
- {
- if (OPCODE_AC (opcode->opcode) != OPCODE_AC (insn[0]))
- continue;
- }
- else if (!ARC_SHORT (opcode->mask) && (*insn_len == 4))
- {
- if (OPCODE (opcode->opcode) != OPCODE (insn[0]))
- continue;
- }
- else
- continue;
-
- if ((insn[0] ^ opcode->opcode) & opcode->mask)
- continue;
-
- if (!(opcode->cpu & isa_mask))
- continue;
-
- if (!limm_loaded)
- {
- status = (*info->read_memory_func) (memaddr + *insn_len, buffer,
- 4, info);
- if (status != 0)
- return NULL;
-
- limm = ARRANGE_ENDIAN (info, buffer);
- limm_loaded = TRUE;
- }
-
- /* Check the second word using the mask and template. */
- if ((limm & arc_long_opcodes[i].limm_mask)
- != arc_long_opcodes[i].limm_template)
- continue;
-
- (*insn_len) += 4;
- insn[1] = limm;
- return &arc_long_opcodes[i];
+ info->fprintf_func (info->stream,
+ _("\nWarning: disassembly may be wrong due to "
+ "guessed opcode class choice.\n"
+ "Use -M<class[,class]> to select the correct "
+ "opcode class(es).\n\t\t\t\t"));
+ return t_op;
}
return NULL;
/* Find opcode for INSN, trying various different sources. The instruction
length in INSN_LEN will be updated if the instruction requires a LIMM
- extension, and the additional values loaded into the INSN array (which
- must be big enough).
+ extension.
A pointer to the opcode is placed into OPCODE_RESULT, and ITER is
- initialised, ready to iterate over the operands of the found opcode.
+ initialised, ready to iterate over the operands of the found opcode. If
+ the found opcode requires a LIMM then the LIMM value will be loaded into a
+ field of ITER.
This function returns TRUE in almost all cases, FALSE is reserved to
- indicate an error (failing to find an opcode is not an error) a
- returned result of FALSE would indicate that the disassembler can't
- continue.
+ indicate an error (failing to find an opcode is not an error) a returned
+ result of FALSE would indicate that the disassembler can't continue.
- If no matching opcode is found then the returned result will be TRUE,
- the value placed into OPCODE_RESULT will be NULL, ITER will be
- undefined, and INSN_LEN will be unchanged.
+ If no matching opcode is found then the returned result will be TRUE, the
+ value placed into OPCODE_RESULT will be NULL, ITER will be undefined, and
+ INSN_LEN will be unchanged.
- If a matching opcode is found, then the returned result will be TRUE,
- the opcode pointer is placed into OPCODE_RESULT, INSN_LEN will be
- increased by 4 if the instruction requires a LIMM, and the LIMM value
- will have been loaded into the INSN[1]. Finally, ITER will have been
- initialised so that calls to OPERAND_ITERATOR_NEXT will iterate over
- the opcode's operands. */
+ If a matching opcode is found, then the returned result will be TRUE, the
+ opcode pointer is placed into OPCODE_RESULT, INSN_LEN will be increased by
+ 4 if the instruction requires a LIMM, and the LIMM value will have been
+ loaded into a field of ITER. Finally, ITER will have been initialised so
+ that calls to OPERAND_ITERATOR_NEXT will iterate over the opcode's
+ operands. */
static bfd_boolean
-find_format (bfd_vma memaddr, unsigned *insn, unsigned int *insn_len,
- unsigned isa_mask, struct disassemble_info *info,
- const struct arc_opcode **opcode_result,
- struct arc_operand_iterator *iter)
+find_format (bfd_vma memaddr,
+ unsigned long long insn,
+ unsigned int * insn_len,
+ unsigned isa_mask,
+ struct disassemble_info * info,
+ const struct arc_opcode ** opcode_result,
+ struct arc_operand_iterator * iter)
{
- const struct arc_opcode *opcode;
+ const struct arc_opcode *opcode = NULL;
bfd_boolean needs_limm;
+ const extInstruction_t *einsn, *i;
+ unsigned limm = 0;
- /* Find the first match in the opcode table. */
- opcode = find_format_from_table (arc_opcodes, insn, *insn_len,
- isa_mask, &needs_limm);
-
- if (opcode == NULL)
+ /* First, try the extension instructions. */
+ if (*insn_len == 4)
{
- const extInstruction_t *einsn;
-
- /* No instruction found. Try the extensions. */
- einsn = arcExtMap_insn (OPCODE (insn[0]), insn[0]);
- if (einsn != NULL)
+ einsn = arcExtMap_insn (OPCODE_32BIT_INSN (insn), insn);
+ for (i = einsn; (i != NULL) && (opcode == NULL); i = i->next)
{
const char *errmsg = NULL;
- opcode = arcExtMap_genOpcode (einsn, isa_mask, &errmsg);
+
+ opcode = arcExtMap_genOpcode (i, isa_mask, &errmsg);
if (opcode == NULL)
{
- (*info->fprintf_func) (info->stream,
- "An error occured while "
- "generating the extension instruction "
- "operations");
- *opcode_result = NULL;
+ (*info->fprintf_func) (info->stream, "\
+An error occured while generating the extension instruction operations");
+ *opcode_result = NULL;
return FALSE;
}
- opcode = find_format_from_table (opcode, insn, *insn_len,
- isa_mask, &needs_limm);
- assert (opcode != NULL);
+ opcode = find_format_from_table (info, opcode, insn, *insn_len,
+ isa_mask, &needs_limm, FALSE);
}
}
+ /* Then, try finding the first match in the opcode table. */
+ if (opcode == NULL)
+ opcode = find_format_from_table (info, arc_opcodes, insn, *insn_len,
+ isa_mask, &needs_limm, TRUE);
+
if (needs_limm && opcode != NULL)
{
bfd_byte buffer[4];
}
else
{
- insn[1] = ARRANGE_ENDIAN (info, buffer);
+ limm = ARRANGE_ENDIAN (info, buffer);
*insn_len += 4;
}
}
- if (opcode == NULL)
+ if (opcode != NULL)
{
- const struct arc_long_opcode *long_opcode;
-
- /* No instruction found yet, try the long instructions. */
- long_opcode =
- find_format_long_instructions (insn, insn_len, isa_mask,
- memaddr, info);
-
- if (long_opcode != NULL)
- {
- iter->mode = OPERAND_ITERATOR_LONG;
- iter->insn = insn;
- iter->state.long_insn.long_opcode = long_opcode;
- iter->state.long_insn.opidx_base =
- long_opcode->base_opcode.operands;
- iter->state.long_insn.opidx_limm =
- long_opcode->operands;
- opcode = &long_opcode->base_opcode;
- }
- }
- else
- {
- iter->mode = OPERAND_ITERATOR_STANDARD;
iter->insn = insn;
- iter->state.standard.opcode = opcode;
- iter->state.standard.opidx = opcode->operands;
+ iter->limm = limm;
+ iter->opcode = opcode;
+ iter->opidx = opcode->operands;
}
*opcode_result = opcode;
static void
print_flags (const struct arc_opcode *opcode,
- unsigned *insn,
+ unsigned long long *insn,
struct disassemble_info *info)
{
const unsigned char *flgidx;
return NULL;
}
+/* Convert a value representing an address type to a string used to refer to
+ the address type in assembly code. */
+
+static const char *
+get_addrtype (int value)
+{
+ if (value < 0 || value > addrtypenames_max)
+ return addrtypeunknown;
+
+ return addrtypenames[value];
+}
+
/* Calculate the instruction length for an instruction starting with MSB
and LSB, the most and least significant byte. The ISA_MASK is used to
filter the instructions considered to only those that are part of the
{
bfd_byte minor_opcode = lsb & 0x1f;
- if (minor_opcode < 4)
- return 2;
+ if (minor_opcode < 4)
+ return 6;
+ else if (minor_opcode == 0x10 || minor_opcode == 0x11)
+ return 8;
+ }
+ if (major_opcode == 0xa)
+ {
+ return 8;
}
+ /* Fall through. */
case bfd_mach_arc_arc600:
return (major_opcode > 0xb) ? 2 : 4;
break;
is held in the array INSN. */
static int
-extract_operand_value (const struct arc_operand *operand, unsigned *insn)
+extract_operand_value (const struct arc_operand *operand,
+ unsigned long long insn,
+ unsigned limm)
{
int value;
if (operand->flags & ARC_OPERAND_LIMM)
/* The second part of the instruction value will have been loaded as
part of the find_format call made earlier. */
- value = insn[1];
+ value = limm;
else
{
if (operand->extract)
- value = (*operand->extract) (insn[0], (int *) NULL);
+ value = (*operand->extract) (insn, (int *) NULL);
else
{
if (operand->flags & ARC_OPERAND_ALIGNED32)
{
- value = (insn[0] >> operand->shift)
+ value = (insn >> operand->shift)
& ((1 << (operand->bits - 2)) - 1);
value = value << 2;
}
else
{
- value = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1);
+ value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
}
if (operand->flags & ARC_OPERAND_SIGNED)
{
const struct arc_operand **operand,
int *value)
{
- if (iter->mode == OPERAND_ITERATOR_STANDARD)
+ if (*iter->opidx == 0)
{
- if (*iter->state.standard.opidx == 0)
- {
- *operand = NULL;
- return FALSE;
- }
+ *operand = NULL;
+ return FALSE;
+ }
- *operand = &arc_operands[*iter->state.standard.opidx];
- *value = extract_operand_value (*operand, iter->insn);
- iter->state.standard.opidx++;
+ *operand = &arc_operands[*iter->opidx];
+ *value = extract_operand_value (*operand, iter->insn, iter->limm);
+ iter->opidx++;
+
+ return TRUE;
+}
+
+/* Helper for parsing the options. */
+
+static void
+parse_option (char *option)
+{
+ if (CONST_STRNEQ (option, "dsp"))
+ add_to_decodelist (DSP, NONE);
+
+ else if (CONST_STRNEQ (option, "spfp"))
+ add_to_decodelist (FLOAT, SPX);
+
+ else if (CONST_STRNEQ (option, "dpfp"))
+ add_to_decodelist (FLOAT, DPX);
+
+ else if (CONST_STRNEQ (option, "quarkse_em"))
+ {
+ add_to_decodelist (FLOAT, DPX);
+ add_to_decodelist (FLOAT, SPX);
+ add_to_decodelist (FLOAT, QUARKSE);
}
- else
+
+ else if (CONST_STRNEQ (option, "fpuda"))
+ add_to_decodelist (FLOAT, DPA);
+
+ else if (CONST_STRNEQ (option, "fpus"))
{
- const struct arc_operand *operand_base, *operand_limm;
- int value_base, value_limm;
+ add_to_decodelist (FLOAT, SP);
+ add_to_decodelist (FLOAT, CVT);
+ }
- if (*iter->state.long_insn.opidx_limm == 0)
- {
- *operand = NULL;
- return FALSE;
- }
+ else if (CONST_STRNEQ (option, "fpud"))
+ {
+ add_to_decodelist (FLOAT, DP);
+ add_to_decodelist (FLOAT, CVT);
+ }
+ else
+ fprintf (stderr, _("Unrecognised disassembler option: %s\n"), option);
+}
- operand_base = &arc_operands[*iter->state.long_insn.opidx_base];
- operand_limm = &arc_operands[*iter->state.long_insn.opidx_limm];
+/* Go over the options list and parse it. */
- if (operand_base->flags & ARC_OPERAND_LIMM)
- {
- /* We've reached the end of the operand list. */
- *operand = NULL;
- return FALSE;
- }
+static void
+parse_disassembler_options (char *options)
+{
+ if (options == NULL)
+ return;
- value_base = value_limm = 0;
- if (!(operand_limm->flags & ARC_OPERAND_IGNORE))
- {
- /* This should never happen. If it does then the use of
- extract_operand_value below will access memory beyond
- the insn array. */
- assert ((operand_limm->flags & ARC_OPERAND_LIMM) == 0);
+ while (*options)
+ {
+ /* Skip empty options. */
+ if (*options == ',')
+ {
+ ++ options;
+ continue;
+ }
- *operand = operand_limm;
- value_limm = extract_operand_value (*operand, &iter->insn[1]);
- }
+ parse_option (options);
- if (!(operand_base->flags & ARC_OPERAND_IGNORE))
- {
- *operand = operand_base;
- value_base = extract_operand_value (*operand, iter->insn);
- }
+ while (*options != ',' && *options != '\0')
+ ++ options;
+ }
+}
- /* This is a bit of a fudge. There's no reason why simply ORing
- together the two values is the right thing to do, however, for all
- the cases we currently have, it is the right thing, so, for now,
- I've put off solving the more complex problem. */
- *value = value_base | value_limm;
+/* Return the instruction type for an instruction described by OPCODE. */
- iter->state.long_insn.opidx_base++;
- iter->state.long_insn.opidx_limm++;
+static enum dis_insn_type
+arc_opcode_to_insn_type (const struct arc_opcode *opcode)
+{
+ enum dis_insn_type insn_type;
+
+ switch (opcode->insn_class)
+ {
+ case BRANCH:
+ case JUMP:
+ if (!strncmp (opcode->name, "bl", 2)
+ || !strncmp (opcode->name, "jl", 2))
+ {
+ if (opcode->subclass == COND)
+ insn_type = dis_condjsr;
+ else
+ insn_type = dis_jsr;
+ }
+ else
+ {
+ if (opcode->subclass == COND)
+ insn_type = dis_condbranch;
+ else
+ insn_type = dis_branch;
+ }
+ break;
+ case LOAD:
+ case STORE:
+ case MEMORY:
+ insn_type = dis_dref;
+ break;
+ default:
+ insn_type = dis_nonbranch;
+ break;
}
- return TRUE;
+
+ return insn_type;
}
/* Disassemble ARC instructions. */
print_insn_arc (bfd_vma memaddr,
struct disassemble_info *info)
{
- bfd_byte buffer[4];
- unsigned int lowbyte, highbyte;
+ bfd_byte buffer[8];
+ unsigned int highbyte, lowbyte;
int status;
unsigned int insn_len;
- unsigned insn[2] = { 0, 0 };
+ unsigned long long insn = 0;
unsigned isa_mask;
const struct arc_opcode *opcode;
bfd_boolean need_comma;
const struct arc_operand *operand;
int value;
struct arc_operand_iterator iter;
+ Elf_Internal_Ehdr *header = NULL;
+
+ if (info->disassembler_options)
+ {
+ parse_disassembler_options (info->disassembler_options);
+
+ /* Avoid repeated parsing of the options. */
+ info->disassembler_options = NULL;
+ }
memset (&iter, 0, sizeof (iter));
- lowbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 1 : 0);
- highbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 0 : 1);
+ highbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 1 : 0);
+ lowbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 0 : 1);
+
+ if (info->section && info->section->owner)
+ header = elf_elfheader (info->section->owner);
switch (info->mach)
{
case bfd_mach_arc_arcv2:
default:
- isa_mask = ARC_OPCODE_ARCv2HS | ARC_OPCODE_ARCv2EM;
+ isa_mask = ARC_OPCODE_ARCv2EM;
+ /* TODO: Perhaps remove defitinion of header since it is only used at
+ this location. */
+ if (header != NULL
+ && (header->e_flags & EF_ARC_MACH_MSK) == EF_ARC_CPU_ARCV2HS)
+ {
+ isa_mask = ARC_OPCODE_ARCv2HS;
+ /* FPU instructions are not extensions for HS. */
+ add_to_decodelist (FLOAT, SP);
+ add_to_decodelist (FLOAT, DP);
+ add_to_decodelist (FLOAT, CVT);
+ }
break;
}
return size;
}
- insn_len = arc_insn_length (buffer[lowbyte], buffer[highbyte], info);
+ insn_len = arc_insn_length (buffer[highbyte], buffer[lowbyte], info);
pr_debug ("instruction length = %d bytes\n", insn_len);
+
switch (insn_len)
{
case 2:
- insn[0] = (buffer[lowbyte] << 8) | buffer[highbyte];
+ insn = (buffer[highbyte] << 8) | buffer[lowbyte];
break;
- default:
- /* An unknown instruction is treated as being length 4. This is
- possibly not the best solution, but matches the behaviour that was
- in place before the table based instruction length look-up was
- introduced. */
case 4:
- /* This is a long instruction: Read the remaning 2 bytes. */
- status = (*info->read_memory_func) (memaddr + 2, &buffer[2], 2, info);
- if (status != 0)
- {
- (*info->memory_error_func) (status, memaddr + 2, info);
- return -1;
- }
- insn[0] = ARRANGE_ENDIAN (info, buffer);
+ {
+ /* This is a long instruction: Read the remaning 2 bytes. */
+ status = (*info->read_memory_func) (memaddr + 2, &buffer[2], 2, info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, memaddr + 2, info);
+ return -1;
+ }
+ insn = (unsigned long long) ARRANGE_ENDIAN (info, buffer);
+ }
+ break;
+
+ case 6:
+ {
+ status = (*info->read_memory_func) (memaddr + 2, &buffer[2], 4, info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, memaddr + 2, info);
+ return -1;
+ }
+ insn = (unsigned long long) ARRANGE_ENDIAN (info, &buffer[2]);
+ insn |= ((unsigned long long) buffer[highbyte] << 40)
+ | ((unsigned long long) buffer[lowbyte] << 32);
+ }
break;
+
+ case 8:
+ {
+ status = (*info->read_memory_func) (memaddr + 2, &buffer[2], 6, info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, memaddr + 2, info);
+ return -1;
+ }
+ insn =
+ ((((unsigned long long) ARRANGE_ENDIAN (info, buffer)) << 32)
+ | ((unsigned long long) ARRANGE_ENDIAN (info, &buffer[4])));
+ }
+ break;
+
+ default:
+ /* There is no instruction whose length is not 2, 4, 6, or 8. */
+ abort ();
}
+ pr_debug ("instruction value = %llx\n", insn);
+
/* Set some defaults for the insn info. */
info->insn_info_valid = 1;
info->branch_delay_insns = 0;
if (!opcode)
{
- if (insn_len == 2)
- (*info->fprintf_func) (info->stream, ".long %#04x", insn[0]);
- else
- (*info->fprintf_func) (info->stream, ".long %#08x", insn[0]);
+ switch (insn_len)
+ {
+ case 2:
+ (*info->fprintf_func) (info->stream, ".long %#04llx",
+ insn & 0xffff);
+ break;
+ case 4:
+ (*info->fprintf_func) (info->stream, ".long %#08llx",
+ insn & 0xffffffff);
+ break;
+ case 6:
+ (*info->fprintf_func) (info->stream, ".long %#08llx",
+ insn & 0xffffffff);
+ (*info->fprintf_func) (info->stream, ".long %#04llx",
+ (insn >> 32) & 0xffff);
+ break;
+ case 8:
+ (*info->fprintf_func) (info->stream, ".long %#08llx",
+ insn & 0xffffffff);
+ (*info->fprintf_func) (info->stream, ".long %#08llx",
+ insn >> 32);
+ break;
+ default:
+ abort ();
+ }
info->insn_type = dis_noninsn;
return insn_len;
(*info->fprintf_func) (info->stream, "%s", opcode->name);
/* Preselect the insn class. */
- switch (opcode->insn_class)
- {
- case BRANCH:
- case JUMP:
- if (!strncmp (opcode->name, "bl", 2)
- || !strncmp (opcode->name, "jl", 2))
- {
- if (opcode->subclass == COND)
- info->insn_type = dis_condjsr;
- else
- info->insn_type = dis_jsr;
- }
- else
- {
- if (opcode->subclass == COND)
- info->insn_type = dis_condbranch;
- else
- info->insn_type = dis_branch;
- }
- break;
- case MEMORY:
- info->insn_type = dis_dref; /* FIXME! DB indicates mov as memory! */
- break;
- default:
- info->insn_type = dis_nonbranch;
- break;
- }
+ info->insn_type = arc_opcode_to_insn_type (opcode);
- pr_debug ("%s: 0x%08x\n", opcode->name, opcode->opcode);
+ pr_debug ("%s: 0x%08llx\n", opcode->name, opcode->opcode);
- print_flags (opcode, insn, info);
+ print_flags (opcode, &insn, info);
if (opcode->operands[0] != 0)
(*info->fprintf_func) (info->stream, "\t");
}
/* Only take input from real operands. */
- if ((operand->flags & ARC_OPERAND_FAKE)
- && !(operand->flags & ARC_OPERAND_BRAKET))
+ if (ARC_OPERAND_IS_FAKE (operand))
continue;
if ((operand->flags & ARC_OPERAND_IGNORE)
&& value == -1)
continue;
+ if (operand->flags & ARC_OPERAND_COLON)
+ {
+ (*info->fprintf_func) (info->stream, ":");
+ continue;
+ }
+
if (need_comma)
(*info->fprintf_func) (info->stream, ",");
continue;
}
+ need_comma = TRUE;
+
/* Print the operand as directed by the flags. */
if (operand->flags & ARC_OPERAND_IR)
{
else if (operand->flags & ARC_OPERAND_LIMM)
{
const char *rname = get_auxreg (opcode, value, isa_mask);
+
if (rname && open_braket)
(*info->fprintf_func) (info->stream, "%s", rname);
else
else
(*info->fprintf_func) (info->stream, "%d", value);
}
+ else if (operand->flags & ARC_OPERAND_ADDRTYPE)
+ {
+ const char *addrtype = get_addrtype (value);
+ (*info->fprintf_func) (info->stream, "%s", addrtype);
+ /* A colon follow an address type. */
+ need_comma = FALSE;
+ }
else
{
if (operand->flags & ARC_OPERAND_TRUNCATE
(*info->fprintf_func) (info->stream, "%#x", value);
}
}
-
- need_comma = TRUE;
}
return insn_len;
disassembler_ftype
arc_get_disassembler (bfd *abfd)
{
- /* Read the extenssion insns and registers, if any. */
- build_ARC_extmap (abfd);
+ /* BFD my be absent, if opcodes is invoked from the debugger that
+ has connected to remote target and doesn't have an ELF file. */
+ if (abfd != NULL)
+ {
+ /* Read the extension insns and registers, if any. */
+ build_ARC_extmap (abfd);
#ifdef DEBUG
- dump_ARC_extmap ();
+ dump_ARC_extmap ();
#endif
+ }
return print_insn_arc;
}
return ret;
}
+void
+print_arc_disassembler_options (FILE *stream)
+{
+ fprintf (stream, _("\n\
+The following ARC specific disassembler options are supported for use \n\
+with -M switch (multiple options should be separated by commas):\n"));
+
+ fprintf (stream, _("\
+ dsp Recognize DSP instructions.\n"));
+ fprintf (stream, _("\
+ spfp Recognize FPX SP instructions.\n"));
+ fprintf (stream, _("\
+ dpfp Recognize FPX DP instructions.\n"));
+ fprintf (stream, _("\
+ quarkse_em Recognize FPU QuarkSE-EM instructions.\n"));
+ fprintf (stream, _("\
+ fpuda Recognize double assist FPU instructions.\n"));
+ fprintf (stream, _("\
+ fpus Recognize single precision FPU instructions.\n"));
+ fprintf (stream, _("\
+ fpud Recognize double precision FPU instructions.\n"));
+}
+
+
/* Local variables:
eval: (c-set-style "gnu")
indent-tabs-mode: t
projects / binutils-gdb.git / blobdiff