/* Instruction printing code for the ARC.
- Copyright (C) 1994-2016 Free Software Foundation, Inc.
+ Copyright (C) 1994-2020 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
+{
+ /* The complete instruction value to extract operands from. */
+ unsigned long long insn;
+
+ /* 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;
+
+ /* The opcode this iterator is operating on. */
+ const struct arc_opcode *opcode;
+
+ /* The index into the opcodes operand index list. */
+ const unsigned char *opidx;
+};
+
+/* A private data used by ARC decoder. */
+struct arc_disassemble_info
+{
+ /* The current disassembled arc opcode. */
+ const struct arc_opcode *opcode;
+
+ /* Instruction length w/o limm field. */
+ unsigned insn_len;
+
+ /* TRUE if we have limm. */
+ bfd_boolean limm_p;
+
+ /* LIMM value, if exists. */
+ unsigned limm;
+
+ /* Condition code, if exists. */
+ unsigned condition_code;
+
+ /* Writeback mode. */
+ unsigned writeback_mode;
+
+ /* Number of operands. */
+ unsigned operands_count;
+
+ struct arc_insn_operand operands[MAX_INSN_ARGS];
+};
/* 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;
+
+/* ISA mask value enforced via disassembler info options. ARC_OPCODE_NONE
+ value means that no CPU is enforced. */
+
+static unsigned enforced_isa_mask = ARC_OPCODE_NONE;
+
+/* True if we want to print using only hex numbers. */
+static bfd_boolean print_hex = FALSE;
+
/* Macros section. */
#ifdef DEBUG
(info->endian == BFD_ENDIAN_LITTLE ? bfd_getm32 (bfd_getl32 (buf)) \
: bfd_getb32 (buf))
-#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 BITS(word,s,e) (((word) >> (s)) & ((1ull << ((e) - (s)) << 1) - 1))
+#define OPCODE_32BIT_INSN(word) (BITS ((word), 27, 31))
/* Functions implementation. */
+/* Initialize private data. */
+static bfd_boolean
+init_arc_disasm_info (struct disassemble_info *info)
+{
+ struct arc_disassemble_info *arc_infop
+ = calloc (sizeof (*arc_infop), 1);
+
+ if (arc_infop == NULL)
+ return FALSE;
+
+ info->private_data = arc_infop;
+ return TRUE;
+}
+
+/* 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
+ /* Can be an APEX extensions. */
+ && OPCODE_32BIT_INSN (opcode->opcode) != 0x07))
+ return FALSE;
+
+ /* or not a known truble class. */
+ switch (opcode->insn_class)
+ {
+ case FLOAT:
+ case DSP:
+ case ARITH:
+ case MPY:
+ 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 proper format for the given opcode. */
+/* 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 (const struct arc_opcode *arc_table,
- unsigned *insn, unsigned int insnLen,
- unsigned isa_mask)
+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) && (insnLen == 2))
- {
- if (OPCODE_AC (opcode->opcode) != OPCODE_AC (insn[0]))
- continue;
- }
- else if (!ARC_SHORT (opcode->mask) && (insnLen == 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;
- /* Possible candidate, check the operands. */
- for (opidx = opcode->operands; *opidx; opidx++)
- {
- int value;
- const struct arc_operand *operand = &arc_operands[*opidx];
+ *has_limm = FALSE;
- if (operand->flags & ARC_OPERAND_FAKE)
- continue;
+ /* Possible candidate, check the operands. */
+ for (opidx = opcode->operands; *opidx; opidx++)
+ {
+ int value, limmind;
+ const struct arc_operand *operand = &arc_operands[*opidx];
- if (operand->extract)
- value = (*operand->extract) (insn[0], &invalid);
- else
- value = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1);
+ if (operand->flags & ARC_OPERAND_FAKE)
+ continue;
- /* 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 && insnLen == 4)
- || (value == 0x1E && insnLen == 2))
- {
- invalid = TRUE;
- break;
- }
- }
- }
+ if (operand->extract)
+ value = (*operand->extract) (insn, &invalid);
+ else
+ value = (insn >> operand->shift) & ((1ull << operand->bits) - 1);
- /* 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 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;
+ }
+
+ /* 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;
+ }
+
+ /* Check for the implicit flags. */
+ if (cl_flags->flag_class & F_CLASS_IMPLICIT)
+ 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;
+ }
+
+ if (!foundA && foundB)
+ {
+ invalid = TRUE;
+ break;
+ }
+ }
- if (invalid)
- continue;
+ if (invalid)
+ continue;
- /* The instruction is valid. */
- return opcode;
- } while (opcode->mask);
+ if (insn_len == 4
+ && overlaps)
+ {
+ warn_p = TRUE;
+ t_op = opcode;
+ if (skip_this_opcode (opcode))
+ continue;
+ }
+
+ /* The instruction is valid. */
+ return opcode;
+ }
+ while (opcode->mask);
+
+ if (warn_p)
+ {
+ 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.
+
+ A pointer to the opcode is placed into OPCODE_RESULT, and ITER is
+ 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.
+
+ 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 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 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 = NULL;
+ bfd_boolean needs_limm;
+ const extInstruction_t *einsn, *i;
+ unsigned limm = 0;
+ struct arc_disassemble_info *arc_infop = info->private_data;
+
+ /* First, try the extension instructions. */
+ if (*insn_len == 4)
+ {
+ 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 (i, isa_mask, &errmsg);
+ if (opcode == 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 (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];
+ int status;
+
+ status = (*info->read_memory_func) (memaddr + *insn_len, buffer,
+ 4, info);
+ if (status != 0)
+ {
+ opcode = NULL;
+ }
+ else
+ {
+ limm = ARRANGE_ENDIAN (info, buffer);
+ *insn_len += 4;
+ }
+ }
+
+ if (opcode != NULL)
+ {
+ iter->insn = insn;
+ iter->limm = limm;
+ iter->opcode = opcode;
+ iter->opidx = opcode->operands;
+ }
+
+ *opcode_result = opcode;
+
+ /* Update private data. */
+ arc_infop->opcode = opcode;
+ arc_infop->limm = (needs_limm) ? limm : 0;
+ arc_infop->limm_p = needs_limm;
+
+ return TRUE;
+}
+
static void
print_flags (const struct arc_opcode *opcode,
- unsigned *insn,
+ unsigned long long *insn,
struct disassemble_info *info)
{
const unsigned char *flgidx;
unsigned int value;
+ struct arc_disassemble_info *arc_infop = info->private_data;
/* Now extract and print the flags. */
for (flgidx = opcode->flags; *flgidx; flgidx++)
const struct arc_flag_operand *flg_operand =
&arc_flag_operands[*flgopridx];
+ /* Implicit flags are only used for the insn decoder. */
+ if (cl_flags->flag_class & F_CLASS_IMPLICIT)
+ {
+ if (cl_flags->flag_class & F_CLASS_COND)
+ arc_infop->condition_code = flg_operand->code;
+ else if (cl_flags->flag_class & F_CLASS_WB)
+ arc_infop->writeback_mode = flg_operand->code;
+ else if (cl_flags->flag_class & F_CLASS_ZZ)
+ info->data_size = flg_operand->code;
+ continue;
+ }
+
if (!flg_operand->favail)
continue;
break;
}
}
+ if (flg_operand->name[0] == 'd'
+ && flg_operand->name[1] == 0)
+ info->branch_delay_insns = 1;
+
+ /* Check if it is a conditional flag. */
+ if (cl_flags->flag_class & F_CLASS_COND)
+ {
+ if (info->insn_type == dis_jsr)
+ info->insn_type = dis_condjsr;
+ else if (info->insn_type == dis_branch)
+ info->insn_type = dis_condbranch;
+ arc_infop->condition_code = flg_operand->code;
+ }
+
+ /* Check for the write back modes. */
+ if (cl_flags->flag_class & F_CLASS_WB)
+ arc_infop->writeback_mode = flg_operand->code;
+
(*info->fprintf_func) (info->stream, "%s", flg_operand->name);
}
-
- if (flg_operand->name[0] == 'd'
- && flg_operand->name[1] == 0)
- info->branch_delay_insns = 1;
}
}
}
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
cached for later use. */
static unsigned int
-arc_insn_length (bfd_byte msb, struct disassemble_info *info)
+arc_insn_length (bfd_byte msb, bfd_byte lsb, struct disassemble_info *info)
{
bfd_byte major_opcode = msb >> 3;
switch (info->mach)
{
- case bfd_mach_arc_nps400:
case bfd_mach_arc_arc700:
+ /* The nps400 extension set requires this special casing of the
+ instruction length calculation. Right now this is not causing any
+ problems as none of the known extensions overlap in opcode space,
+ but, if they ever do then we might need to start carrying
+ information around in the elf about which extensions are in use. */
+ if (major_opcode == 0xb)
+ {
+ bfd_byte minor_opcode = lsb & 0x1f;
+
+ 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;
break;
default:
- abort ();
+ return 0;
+ }
+}
+
+/* Extract and return the value of OPERAND from the instruction whose value
+ is held in the array INSN. */
+
+static int
+extract_operand_value (const struct arc_operand *operand,
+ unsigned long long insn,
+ unsigned limm)
+{
+ int value;
+
+ /* Read the limm operand, if required. */
+ 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 = limm;
+ else
+ {
+ if (operand->extract)
+ value = (*operand->extract) (insn, (int *) NULL);
+ else
+ {
+ if (operand->flags & ARC_OPERAND_ALIGNED32)
+ {
+ value = (insn >> operand->shift)
+ & ((1 << (operand->bits - 2)) - 1);
+ value = value << 2;
+ }
+ else
+ {
+ value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
+ }
+ if (operand->flags & ARC_OPERAND_SIGNED)
+ {
+ int signbit = 1 << (operand->bits - 1);
+ value = (value ^ signbit) - signbit;
+ }
+ }
+ }
+
+ return value;
+}
+
+/* Find the next operand, and the operands value from ITER. Return TRUE if
+ there is another operand, otherwise return FALSE. If there is an
+ operand returned then the operand is placed into OPERAND, and the value
+ into VALUE. If there is no operand returned then OPERAND and VALUE are
+ unchanged. */
+
+static bfd_boolean
+operand_iterator_next (struct arc_operand_iterator *iter,
+ const struct arc_operand **operand,
+ int *value)
+{
+ if (*iter->opidx == 0)
+ {
+ *operand = NULL;
+ return FALSE;
+ }
+
+ *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 (const char *option)
+{
+ if (disassembler_options_cmp (option, "dsp") == 0)
+ add_to_decodelist (DSP, NONE);
+
+ else if (disassembler_options_cmp (option, "spfp") == 0)
+ add_to_decodelist (FLOAT, SPX);
+
+ else if (disassembler_options_cmp (option, "dpfp") == 0)
+ add_to_decodelist (FLOAT, DPX);
+
+ else if (disassembler_options_cmp (option, "quarkse_em") == 0)
+ {
+ add_to_decodelist (FLOAT, DPX);
+ add_to_decodelist (FLOAT, SPX);
+ add_to_decodelist (FLOAT, QUARKSE1);
+ add_to_decodelist (FLOAT, QUARKSE2);
+ }
+
+ else if (disassembler_options_cmp (option, "fpuda") == 0)
+ add_to_decodelist (FLOAT, DPA);
+
+ else if (disassembler_options_cmp (option, "nps400") == 0)
+ {
+ add_to_decodelist (ACL, NPS400);
+ add_to_decodelist (ARITH, NPS400);
+ add_to_decodelist (BITOP, NPS400);
+ add_to_decodelist (BMU, NPS400);
+ add_to_decodelist (CONTROL, NPS400);
+ add_to_decodelist (DMA, NPS400);
+ add_to_decodelist (DPI, NPS400);
+ add_to_decodelist (MEMORY, NPS400);
+ add_to_decodelist (MISC, NPS400);
+ add_to_decodelist (NET, NPS400);
+ add_to_decodelist (PMU, NPS400);
+ add_to_decodelist (PROTOCOL_DECODE, NPS400);
+ add_to_decodelist (ULTRAIP, NPS400);
+ }
+
+ else if (disassembler_options_cmp (option, "fpus") == 0)
+ {
+ add_to_decodelist (FLOAT, SP);
+ add_to_decodelist (FLOAT, CVT);
+ }
+
+ else if (disassembler_options_cmp (option, "fpud") == 0)
+ {
+ add_to_decodelist (FLOAT, DP);
+ add_to_decodelist (FLOAT, CVT);
+ }
+ else if (CONST_STRNEQ (option, "hex"))
+ print_hex = TRUE;
+ else
+ /* xgettext:c-format */
+ opcodes_error_handler (_("unrecognised disassembler option: %s"), option);
+}
+
+#define ARC_CPU_TYPE_A6xx(NAME,EXTRA) \
+ { #NAME, ARC_OPCODE_ARC600, "ARC600" }
+#define ARC_CPU_TYPE_A7xx(NAME,EXTRA) \
+ { #NAME, ARC_OPCODE_ARC700, "ARC700" }
+#define ARC_CPU_TYPE_AV2EM(NAME,EXTRA) \
+ { #NAME, ARC_OPCODE_ARCv2EM, "ARC EM" }
+#define ARC_CPU_TYPE_AV2HS(NAME,EXTRA) \
+ { #NAME, ARC_OPCODE_ARCv2HS, "ARC HS" }
+#define ARC_CPU_TYPE_NONE \
+ { 0, 0, 0 }
+
+/* A table of CPU names and opcode sets. */
+static const struct cpu_type
+{
+ const char *name;
+ unsigned flags;
+ const char *isa;
+}
+ cpu_types[] =
+{
+ #include "elf/arc-cpu.def"
+};
+
+/* Helper for parsing the CPU options. Accept any of the ARC architectures
+ values. OPTION should be a value passed to cpu=. */
+
+static unsigned
+parse_cpu_option (const char *option)
+{
+ int i;
+
+ for (i = 0; cpu_types[i].name; ++i)
+ {
+ if (!disassembler_options_cmp (cpu_types[i].name, option))
+ {
+ return cpu_types[i].flags;
+ }
+ }
+
+ /* xgettext:c-format */
+ opcodes_error_handler (_("unrecognised disassembler CPU option: %s"), option);
+ return ARC_OPCODE_NONE;
+}
+
+/* Go over the options list and parse it. */
+
+static void
+parse_disassembler_options (const char *options)
+{
+ const char *option;
+
+ if (options == NULL)
+ return;
+
+ /* Disassembler might be reused for difference CPU's, and cpu option set for
+ the first one shouldn't be applied to second (which might not have
+ explicit cpu in its options. Therefore it is required to reset enforced
+ CPU when new options are being parsed. */
+ enforced_isa_mask = ARC_OPCODE_NONE;
+
+ FOR_EACH_DISASSEMBLER_OPTION (option, options)
+ {
+ /* A CPU option? Cannot use STRING_COMMA_LEN because strncmp is also a
+ preprocessor macro. */
+ if (strncmp (option, "cpu=", 4) == 0)
+ /* Strip leading `cpu=`. */
+ enforced_isa_mask = parse_cpu_option (option + 4);
+ else
+ parse_option (option);
+ }
+}
+
+/* Return the instruction type for an instruction described by OPCODE. */
+
+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 BBIT0:
+ case BBIT1:
+ case BI:
+ case BIH:
+ case BRCC:
+ case EI:
+ case JLI:
+ case JUMP:
+ case LOOP:
+ 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:
+ case ENTER:
+ case PUSH:
+ case POP:
+ insn_type = dis_dref;
+ break;
+ case LEAVE:
+ insn_type = dis_branch;
+ break;
+ default:
+ insn_type = dis_nonbranch;
+ break;
}
+
+ 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 insnLen;
- unsigned insn[2] = { 0, 0 };
- unsigned isa_mask;
- const unsigned char *opidx;
+ unsigned int insn_len;
+ unsigned long long insn = 0;
+ unsigned isa_mask = ARC_OPCODE_NONE;
const struct arc_opcode *opcode;
- const extInstruction_t *einsn;
bfd_boolean need_comma;
bfd_boolean open_braket;
int size;
+ const struct arc_operand *operand;
+ int value, vpcl;
+ struct arc_operand_iterator iter;
+ struct arc_disassemble_info *arc_infop;
+ bfd_boolean rpcl = FALSE, rset = FALSE;
- lowbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 1 : 0);
- highbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 0 : 1);
+ if (info->disassembler_options)
+ {
+ parse_disassembler_options (info->disassembler_options);
- switch (info->mach)
+ /* Avoid repeated parsing of the options. */
+ info->disassembler_options = NULL;
+ }
+
+ if (info->private_data == NULL && !init_arc_disasm_info (info))
+ return -1;
+
+ memset (&iter, 0, sizeof (iter));
+ highbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 1 : 0);
+ lowbyte = ((info->endian == BFD_ENDIAN_LITTLE) ? 0 : 1);
+
+ /* Figure out CPU type, unless it was enforced via disassembler options. */
+ if (enforced_isa_mask == ARC_OPCODE_NONE)
{
- case bfd_mach_arc_nps400:
- isa_mask = ARC_OPCODE_ARC700 | ARC_OPCODE_NPS400;
- break;
+ Elf_Internal_Ehdr *header = NULL;
- case bfd_mach_arc_arc700:
- isa_mask = ARC_OPCODE_ARC700;
- break;
+ if (info->section && info->section->owner)
+ header = elf_elfheader (info->section->owner);
- case bfd_mach_arc_arc600:
- isa_mask = ARC_OPCODE_ARC600;
- break;
+ switch (info->mach)
+ {
+ case bfd_mach_arc_arc700:
+ isa_mask = ARC_OPCODE_ARC700;
+ break;
- case bfd_mach_arc_arcv2:
- default:
- isa_mask = ARC_OPCODE_ARCv2HS | ARC_OPCODE_ARCv2EM;
- break;
+ case bfd_mach_arc_arc600:
+ isa_mask = ARC_OPCODE_ARC600;
+ break;
+
+ case bfd_mach_arc_arcv2:
+ default:
+ isa_mask = ARC_OPCODE_ARCv2EM;
+ /* TODO: Perhaps remove definition 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;
+ break;
+ }
+ }
+ else
+ isa_mask = enforced_isa_mask;
+
+ if (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);
}
/* This variable may be set by the instruction decoder. It suggests
the number of bytes objdump should display on a single line. If
the instruction decoder sets this, it should always set it to
the same value in order to get reasonable looking output. */
-
info->bytes_per_line = 8;
/* In the next lines, we set two info variables control the way
8 and bytes_per_chunk is 4, the output will look like this:
00: 00000000 00000000
with the chunks displayed according to "display_endian". */
-
if (info->section
&& !(info->section->flags & SEC_CODE))
{
/* Read the insn into a host word. */
status = (*info->read_memory_func) (memaddr, buffer, size, info);
+
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
(*info->fprintf_func) (info->stream, ".word\t0x%08lx", data);
break;
default:
- abort ();
+ return -1;
}
return size;
}
- insnLen = arc_insn_length (buffer[lowbyte], info);
- switch (insnLen)
+ insn_len = arc_insn_length (buffer[highbyte], buffer[lowbyte], info);
+ pr_debug ("instruction length = %d bytes\n", insn_len);
+ if (insn_len == 0)
+ return -1;
+
+ arc_infop = info->private_data;
+ arc_infop->insn_len = 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. */
+ return -1;
}
+ pr_debug ("instruction value = %llx\n", insn);
+
/* Set some defaults for the insn info. */
info->insn_info_valid = 1;
info->branch_delay_insns = 0;
- info->data_size = 0;
+ info->data_size = 4;
info->insn_type = dis_nonbranch;
info->target = 0;
info->target2 = 0;
info->disassembler_needs_relocs = TRUE;
/* Find the first match in the opcode table. */
- opcode = find_format (arc_opcodes, insn, insnLen, isa_mask);
+ if (!find_format (memaddr, insn, &insn_len, isa_mask, info, &opcode, &iter))
+ return -1;
if (!opcode)
{
- /* No instruction found. Try the extensions. */
- einsn = arcExtMap_insn (OPCODE (insn[0]), insn[0]);
- if (einsn)
+ switch (insn_len)
{
- const char *errmsg = NULL;
- opcode = arcExtMap_genOpcode (einsn, isa_mask, &errmsg);
- if (opcode == NULL)
- {
- (*info->fprintf_func) (info->stream,
- "An error occured while "
- "generating the extension instruction "
- "operations");
- return -1;
- }
+ case 2:
+ (*info->fprintf_func) (info->stream, ".shor\t%#04llx",
+ insn & 0xffff);
+ break;
- opcode = find_format (opcode, insn, insnLen, isa_mask);
- assert (opcode != NULL);
- }
- else
- {
- if (insnLen == 2)
- (*info->fprintf_func) (info->stream, ".long %#04x", insn[0]);
- else
- (*info->fprintf_func) (info->stream, ".long %#08x", insn[0]);
+ case 4:
+ (*info->fprintf_func) (info->stream, ".word\t%#08llx",
+ insn & 0xffffffff);
+ break;
+
+ case 6:
+ (*info->fprintf_func) (info->stream, ".long\t%#08llx",
+ insn & 0xffffffff);
+ (*info->fprintf_func) (info->stream, ".long\t%#04llx",
+ (insn >> 32) & 0xffff);
+ break;
- info->insn_type = dis_noninsn;
- return insnLen;
+ case 8:
+ (*info->fprintf_func) (info->stream, ".long\t%#08llx",
+ insn & 0xffffffff);
+ (*info->fprintf_func) (info->stream, ".long\t%#08llx",
+ insn >> 32);
+ break;
+
+ default:
+ return -1;
}
+
+ info->insn_type = dis_noninsn;
+ return insn_len;
}
/* Print the mnemonic. */
(*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))
- info->insn_type = dis_jsr;
- 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");
need_comma = FALSE;
open_braket = FALSE;
+ arc_infop->operands_count = 0;
/* Now extract and print the operands. */
- for (opidx = opcode->operands; *opidx; opidx++)
+ operand = NULL;
+ vpcl = 0;
+ while (operand_iterator_next (&iter, &operand, &value))
{
- const struct arc_operand *operand = &arc_operands[*opidx];
- int value;
-
if (open_braket && (operand->flags & ARC_OPERAND_BRAKET))
{
(*info->fprintf_func) (info->stream, "]");
}
/* 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->extract)
- value = (*operand->extract) (insn[0], (int *) NULL);
- else
+ if ((operand->flags & ARC_OPERAND_IGNORE)
+ && (operand->flags & ARC_OPERAND_IR)
+ && value == -1)
+ continue;
+
+ if (operand->flags & ARC_OPERAND_COLON)
{
- if (operand->flags & ARC_OPERAND_ALIGNED32)
- {
- value = (insn[0] >> operand->shift)
- & ((1 << (operand->bits - 2)) - 1);
- value = value << 2;
- }
- else
- {
- value = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1);
- }
- if (operand->flags & ARC_OPERAND_SIGNED)
- {
- int signbit = 1 << (operand->bits - 1);
- value = (value ^ signbit) - signbit;
- }
+ (*info->fprintf_func) (info->stream, ":");
+ continue;
}
- if (operand->flags & ARC_OPERAND_IGNORE
- && (operand->flags & ARC_OPERAND_IR
- && value == -1))
- continue;
-
if (need_comma)
(*info->fprintf_func) (info->stream, ",");
continue;
}
- /* Read the limm operand, if required. */
- if (operand->flags & ARC_OPERAND_LIMM
- && !(operand->flags & ARC_OPERAND_DUPLICATE))
+ need_comma = TRUE;
+
+ if (operand->flags & ARC_OPERAND_PCREL)
{
- status = (*info->read_memory_func) (memaddr + insnLen, buffer,
- 4, info);
- if (status != 0)
- {
- (*info->memory_error_func) (status, memaddr + insnLen, info);
- return -1;
- }
- insn[1] = ARRANGE_ENDIAN (info, buffer);
+ rpcl = TRUE;
+ vpcl = value;
+ rset = TRUE;
+
+ info->target = (bfd_vma) (memaddr & ~3) + value;
+ }
+ else if (!(operand->flags & ARC_OPERAND_IR))
+ {
+ vpcl = value;
+ rset = TRUE;
}
/* Print the operand as directed by the flags. */
rname = regnames[value + 1];
(*info->fprintf_func) (info->stream, "%s", rname);
}
+ if (value == 63)
+ rpcl = TRUE;
+ else
+ rpcl = FALSE;
}
else if (operand->flags & ARC_OPERAND_LIMM)
{
- const char *rname = get_auxreg (opcode, insn[1], isa_mask);
+ const char *rname = get_auxreg (opcode, value, isa_mask);
+
if (rname && open_braket)
(*info->fprintf_func) (info->stream, "%s", rname);
else
{
- (*info->fprintf_func) (info->stream, "%#x", insn[1]);
+ (*info->fprintf_func) (info->stream, "%#x", value);
if (info->insn_type == dis_branch
|| info->insn_type == dis_jsr)
- info->target = (bfd_vma) insn[1];
+ info->target = (bfd_vma) value;
}
}
- else if (operand->flags & ARC_OPERAND_PCREL)
- {
- /* PCL relative. */
- if (info->flags & INSN_HAS_RELOC)
- memaddr = 0;
- (*info->print_address_func) ((memaddr & ~3) + value, info);
-
- info->target = (bfd_vma) (memaddr & ~3) + value;
- }
else if (operand->flags & ARC_OPERAND_SIGNED)
{
const char *rname = get_auxreg (opcode, value, isa_mask);
if (rname && open_braket)
(*info->fprintf_func) (info->stream, "%s", rname);
else
- (*info->fprintf_func) (info->stream, "%d", value);
+ {
+ if (print_hex)
+ (*info->fprintf_func) (info->stream, "%#x", value);
+ 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
&& !(operand->flags & ARC_OPERAND_ALIGNED32)
&& !(operand->flags & ARC_OPERAND_ALIGNED16)
- && value > 0 && value <= 14)
- (*info->fprintf_func) (info->stream, "r13-%s",
- regnames[13 + value - 1]);
+ && value >= 0 && value <= 14)
+ {
+ /* Leave/Enter mnemonics. */
+ switch (value)
+ {
+ case 0:
+ need_comma = FALSE;
+ break;
+ case 1:
+ (*info->fprintf_func) (info->stream, "r13");
+ break;
+ default:
+ (*info->fprintf_func) (info->stream, "r13-%s",
+ regnames[13 + value - 1]);
+ break;
+ }
+ rpcl = FALSE;
+ rset = FALSE;
+ }
else
{
const char *rname = get_auxreg (opcode, value, isa_mask);
}
}
- need_comma = TRUE;
+ if (operand->flags & ARC_OPERAND_LIMM)
+ {
+ arc_infop->operands[arc_infop->operands_count].kind
+ = ARC_OPERAND_KIND_LIMM;
+ /* It is not important to have exactly the LIMM indicator
+ here. */
+ arc_infop->operands[arc_infop->operands_count].value = 63;
+ }
+ else
+ {
+ arc_infop->operands[arc_infop->operands_count].value = value;
+ arc_infop->operands[arc_infop->operands_count].kind
+ = (operand->flags & ARC_OPERAND_IR
+ ? ARC_OPERAND_KIND_REG
+ : ARC_OPERAND_KIND_SHIMM);
+ }
+ arc_infop->operands_count ++;
+ }
- /* Adjust insn len. */
- if (operand->flags & ARC_OPERAND_LIMM
- && !(operand->flags & ARC_OPERAND_DUPLICATE))
- insnLen += 4;
+ /* Pretty print extra info for pc-relative operands. */
+ if (rpcl && rset)
+ {
+ if (info->flags & INSN_HAS_RELOC)
+ /* If the instruction has a reloc associated with it, then the
+ offset field in the instruction will actually be the addend
+ for the reloc. (We are using REL type relocs). In such
+ cases, we can ignore the pc when computing addresses, since
+ the addend is not currently pc-relative. */
+ memaddr = 0;
+
+ (*info->fprintf_func) (info->stream, "\t;");
+ (*info->print_address_func) ((memaddr & ~3) + vpcl, info);
}
- return insnLen;
+ 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;
}
-/* Disassemble ARC instructions. Used by debugger. */
+void
+print_arc_disassembler_options (FILE *stream)
+{
+ int i;
+
+ 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"));
+
+ /* cpu=... options. */
+ for (i = 0; cpu_types[i].name; ++i)
+ {
+ /* As of now all value CPU values are less than 16 characters. */
+ fprintf (stream, " cpu=%-16s\tEnforce %s ISA.\n",
+ cpu_types[i].name, cpu_types[i].isa);
+ }
-struct arcDisState
-arcAnalyzeInstr (bfd_vma memaddr,
- struct disassemble_info *info)
+ 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"));
+ fprintf (stream, _("\
+ nps400 Recognize NPS400 instructions.\n"));
+ fprintf (stream, _("\
+ hex Use only hexadecimal number to print immediates.\n"));
+}
+
+void arc_insn_decode (bfd_vma addr,
+ struct disassemble_info *info,
+ disassembler_ftype disasm_func,
+ struct arc_instruction *insn)
{
- struct arcDisState ret;
- memset (&ret, 0, sizeof (struct arcDisState));
-
- ret.instructionLen = print_insn_arc (memaddr, info);
-
-#if 0
- ret.words[0] = insn[0];
- ret.words[1] = insn[1];
- ret._this = &ret;
- ret.coreRegName = _coreRegName;
- ret.auxRegName = _auxRegName;
- ret.condCodeName = _condCodeName;
- ret.instName = _instName;
-#endif
+ const struct arc_opcode *opcode;
+ struct arc_disassemble_info *arc_infop;
+
+ /* Ensure that insn would be in the reset state. */
+ memset (insn, 0, sizeof (struct arc_instruction));
+
+ /* There was an error when disassembling, for example memory read error. */
+ if (disasm_func (addr, info) < 0)
+ {
+ insn->valid = FALSE;
+ return;
+ }
+
+ assert (info->private_data != NULL);
+ arc_infop = info->private_data;
+
+ insn->length = arc_infop->insn_len;;
+ insn->address = addr;
+
+ /* Quick exit if memory at this address is not an instruction. */
+ if (info->insn_type == dis_noninsn)
+ {
+ insn->valid = FALSE;
+ return;
+ }
- return ret;
+ insn->valid = TRUE;
+
+ opcode = (const struct arc_opcode *) arc_infop->opcode;
+ insn->insn_class = opcode->insn_class;
+ insn->limm_value = arc_infop->limm;
+ insn->limm_p = arc_infop->limm_p;
+
+ insn->is_control_flow = (info->insn_type == dis_branch
+ || info->insn_type == dis_condbranch
+ || info->insn_type == dis_jsr
+ || info->insn_type == dis_condjsr);
+
+ insn->has_delay_slot = info->branch_delay_insns;
+ insn->writeback_mode
+ = (enum arc_ldst_writeback_mode) arc_infop->writeback_mode;
+ insn->data_size_mode = info->data_size;
+ insn->condition_code = arc_infop->condition_code;
+ memcpy (insn->operands, arc_infop->operands,
+ sizeof (struct arc_insn_operand) * MAX_INSN_ARGS);
+ insn->operands_count = arc_infop->operands_count;
}
/* Local variables:
projects / deliverable / binutils-gdb.git / blobdiff