/* Print Motorola 68k instructions.
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2021 Free Software Foundation, Inc.
This file is part of the GNU opcodes library.
MA 02110-1301, USA. */
#include "sysdep.h"
-#include "dis-asm.h"
+#include "disassemble.h"
#include "floatformat.h"
#include "libiberty.h"
#include "opintl.h"
-
+#include "cpu-m68k.h"
#include "opcode/m68k.h"
/* Local function prototypes. */
#define COERCE_SIGNED_CHAR(ch) ((int) (((ch) ^ 0x80) & 0xFF) - 128)
#endif
+/* Error code of print_insn_arg's return value. */
+
+enum print_insn_arg_error
+ {
+ /* An invalid operand is found. */
+ PRINT_INSN_ARG_INVALID_OPERAND = -1,
+
+ /* An opcode table error. */
+ PRINT_INSN_ARG_INVALID_OP_TABLE = -2,
+
+ /* A memory error. */
+ PRINT_INSN_ARG_MEMORY_ERROR = -3,
+ };
+
/* Get a 1 byte signed integer. */
#define NEXTBYTE(p, val) \
do \
{ \
p += 2; \
if (!FETCH_DATA (info, p)) \
- return -3; \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
val = COERCE_SIGNED_CHAR (p[-1]); \
} \
while (0)
while (0)
/* Get a 4 byte signed integer. */
-#define COERCE32(x) ((bfd_signed_vma) ((x) ^ 0x80000000) - 0x80000000)
+#define COERCE32(x) (((bfd_vma) (x) ^ 0x80000000) - 0x80000000)
#define NEXTLONG(p, val, ret_val) \
do \
p += 4; \
if (!FETCH_DATA (info, p)) \
return ret_val; \
- val = COERCE32 ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
+ val = COERCE32 (((((((unsigned) p[-4] << 8) + p[-3]) << 8) \
+ + p[-2]) << 8) + p[-1]); \
} \
while (0)
{ \
p += 4; \
if (!FETCH_DATA (info, p)) \
- return -3; \
- val = (unsigned int) ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
+ val = (((((((unsigned) p[-4] << 8) + p[-3]) << 8) \
+ + p[-2]) << 8) + p[-1]); \
} \
while (0)
{ \
p += 4; \
if (!FETCH_DATA (info, p)) \
- return -3; \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
floatformat_to_double (& floatformat_ieee_single_big, \
(char *) p - 4, & val); \
} \
{ \
p += 8; \
if (!FETCH_DATA (info, p)) \
- return -3; \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
floatformat_to_double (& floatformat_ieee_double_big, \
(char *) p - 8, & val); \
} \
{ \
p += 12; \
if (!FETCH_DATA (info, p)) \
- return -3; \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
floatformat_to_double (& floatformat_m68881_ext, \
(char *) p - 12, & val); \
} \
{ \
p += 12; \
if (!FETCH_DATA (info, p)) \
- return -3; \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
val = 0.0; \
} \
while (0)
};
/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
- to ADDR (exclusive) are valid. Returns 1 for success, 0 on error. */
+ to ADDR (exclusive) are valid. Returns 1 for success, 0 on memory
+ error. */
#define FETCH_DATA(info, addr) \
((addr) <= ((struct private *) (info->private_data))->max_fetched \
? 1 : fetch_data ((info), (addr)))
{ \
val = fetch_arg (buffer, place, size, info); \
if (val < 0) \
- return -3; \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
} \
while (0)
/* Returns number of bytes "eaten" by the operand, or
- return -1 if an invalid operand was found, or -2 if
- an opcode tabe error was found or -3 to simply abort.
- ADDR is the pc for this arg to be relative to. */
+ return enum print_insn_arg_error. ADDR is the pc for this arg to be
+ relative to. */
static int
print_insn_arg (const char *d,
(*info->fprintf_func) (info->stream, "{#%d}", val);
}
else
- return -1;
+ return PRINT_INSN_ARG_INVALID_OPERAND;
break;
case '#':
else if (place == 'b')
NEXTBYTE (p1, val);
else if (place == 'w' || place == 'W')
- NEXTWORD (p1, val, -3);
+ NEXTWORD (p1, val, PRINT_INSN_ARG_MEMORY_ERROR);
else if (place == 'l')
- NEXTLONG (p1, val, -3);
+ NEXTLONG (p1, val, PRINT_INSN_ARG_MEMORY_ERROR);
else
- return -2;
+ return PRINT_INSN_ARG_INVALID_OP_TABLE;
(*info->fprintf_func) (info->stream, "#%d", val);
break;
else if (place == 'B')
disp = COERCE_SIGNED_CHAR (buffer[1]);
else if (place == 'w' || place == 'W')
- NEXTWORD (p, disp, -3);
+ NEXTWORD (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
else if (place == 'l' || place == 'L' || place == 'C')
- NEXTLONG (p, disp, -3);
+ NEXTLONG (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
else if (place == 'g')
{
NEXTBYTE (buffer, disp);
if (disp == 0)
- NEXTWORD (p, disp, -3);
+ NEXTWORD (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
else if (disp == -1)
- NEXTLONG (p, disp, -3);
+ NEXTLONG (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
}
else if (place == 'c')
{
if (buffer[1] & 0x40) /* If bit six is one, long offset. */
- NEXTLONG (p, disp, -3);
+ NEXTLONG (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
else
- NEXTWORD (p, disp, -3);
+ NEXTWORD (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
}
else
- return -2;
+ return PRINT_INSN_ARG_INVALID_OP_TABLE;
(*info->print_address_func) (addr + disp, info);
break;
{
int val1;
- NEXTWORD (p, val, -3);
+ NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
FETCH_ARG (3, val1);
(*info->fprintf_func) (info->stream, "%s@(%d)", reg_names[val1 + 8], val);
break;
else if (val == 3)
(*info->fprintf_func) (info->stream, ">>");
else
- return -1;
+ return PRINT_INSN_ARG_INVALID_OPERAND;
break;
case 'I':
/* Get coprocessor ID... */
val = fetch_arg (buffer, 'd', 3, info);
if (val < 0)
- return -3;
+ return PRINT_INSN_ARG_MEMORY_ERROR;
if (val != 1) /* Unusual coprocessor ID? */
(*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
break;
{
val = fetch_arg (buffer, 'x', 6, info);
if (val < 0)
- return -3;
+ return PRINT_INSN_ARG_MEMORY_ERROR;
val = ((val & 7) << 3) + ((val >> 3) & 7);
}
else
{
val = fetch_arg (buffer, 's', 6, info);
if (val < 0)
- return -3;
+ return PRINT_INSN_ARG_MEMORY_ERROR;
}
/* If the <ea> is invalid for *d, then reject this match. */
if (!m68k_valid_ea (*d, val))
- return -1;
+ return PRINT_INSN_ARG_INVALID_OPERAND;
/* Get register number assuming address register. */
regno = (val & 7) + 8;
break;
case 5:
- NEXTWORD (p, val, -3);
+ NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
(*info->fprintf_func) (info->stream, "%s@(%d)", regname, val);
break;
case 6:
p = print_indexed (regno, p, addr, info);
if (p == NULL)
- return -3;
+ return PRINT_INSN_ARG_MEMORY_ERROR;
break;
case 7:
switch (val & 7)
{
case 0:
- NEXTWORD (p, val, -3);
+ NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
(*info->print_address_func) (val, info);
break;
break;
case 2:
- NEXTWORD (p, val, -3);
+ NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
(*info->fprintf_func) (info->stream, "%%pc@(");
(*info->print_address_func) (addr + val, info);
(*info->fprintf_func) (info->stream, ")");
case 3:
p = print_indexed (-1, p, addr, info);
if (p == NULL)
- return -3;
+ return PRINT_INSN_ARG_MEMORY_ERROR;
break;
case 4:
break;
case 'w':
- NEXTWORD (p, val, -3);
+ NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
flt_p = 0;
break;
case 'l':
- NEXTLONG (p, val, -3);
+ NEXTLONG (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
flt_p = 0;
break;
break;
default:
- return -1;
+ return PRINT_INSN_ARG_INVALID_OPERAND;
}
if (flt_p) /* Print a float? */
(*info->fprintf_func) (info->stream, "#0e%g", flval);
break;
default:
- return -1;
+ return PRINT_INSN_ARG_INVALID_OPERAND;
}
}
{
char doneany;
p1 = buffer + 2;
- NEXTWORD (p1, val, -3);
+ NEXTWORD (p1, val, PRINT_INSN_ARG_MEMORY_ERROR);
/* Move the pointer ahead if this point is farther ahead
than the last. */
p = p1 > p ? p1 : p;
(*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
}
else
- return -2;
+ return PRINT_INSN_ARG_INVALID_OP_TABLE;
break;
case 'X':
place = '8';
+ /* Fall through. */
case 'Y':
case 'Z':
case 'W':
break;
default:
- return -2;
+ return PRINT_INSN_ARG_INVALID_OP_TABLE;
}
return p - p0;
}
/* Try to match the current instruction to best and if so, return the
- number of bytes consumed from the instruction stream, else zero. */
+ number of bytes consumed from the instruction stream, else zero.
+ Return -1 on memory error. */
static int
match_insn_m68k (bfd_vma memaddr,
this because we know exactly what the second word is, and we
aren't going to print anything based on it. */
p = buffer + 6;
- FETCH_DATA (info, p);
+ if (!FETCH_DATA (info, p))
+ return -1;
buffer[2] = buffer[4];
buffer[3] = buffer[5];
}
- FETCH_DATA (info, p);
+ if (!FETCH_DATA (info, p))
+ return -1;
save_p = p;
info->print_address_func = dummy_print_address;
if (eaten >= 0)
p += eaten;
- else if (eaten == -1 || eaten == -3)
+ else if (eaten == PRINT_INSN_ARG_INVALID_OPERAND
+ || eaten == PRINT_INSN_ARG_MEMORY_ERROR)
{
info->fprintf_func = save_printer;
info->print_address_func = save_print_address;
- return 0;
+ return eaten == PRINT_INSN_ARG_MEMORY_ERROR ? -1 : 0;
}
else
{
/* Try to interpret the instruction at address MEMADDR as one that
can execute on a processor with the features given by ARCH_MASK.
If successful, print the instruction to INFO->STREAM and return
- its length in bytes. Return 0 otherwise. */
+ its length in bytes. Return 0 otherwise. Return -1 on memory
+ error. */
static int
m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
*opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
}
- FETCH_DATA (info, buffer + 2);
+ if (!FETCH_DATA (info, buffer + 2))
+ return -1;
major_opcode = (buffer[0] >> 4) & 15;
for (i = 0; i < numopcodes[major_opcode]; i++)
/* First try printing an m680x0 instruction. Try printing a Coldfire
one if that fails. */
val = m68k_scan_mask (memaddr, info, m68k_mask);
- if (val == 0)
+ if (val <= 0)
val = m68k_scan_mask (memaddr, info, mcf_mask);
}
else
projects / thirdparty / binutils-gdb.git / blobdiff