/* Print Motorola 68k instructions.
- Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 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) < 0) \
- return -3; \
+ if (!FETCH_DATA (info, p)) \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
val = COERCE_SIGNED_CHAR (p[-1]); \
} \
while (0)
do \
{ \
p += 2; \
- if (FETCH_DATA (info, p) < 0) \
+ if (!FETCH_DATA (info, p)) \
return ret_val; \
val = COERCE16 ((p[-2] << 8) + 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) < 0) \
+ 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)
do \
{ \
p += 4; \
- if (FETCH_DATA (info, p) < 0) \
- return -3; \
- val = (unsigned int) ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
+ if (!FETCH_DATA (info, p)) \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
+ val = (((((((unsigned) p[-4] << 8) + p[-3]) << 8) \
+ + p[-2]) << 8) + p[-1]); \
} \
while (0)
do \
{ \
p += 4; \
- if (FETCH_DATA (info, p) < 0) \
- return -3; \
+ if (!FETCH_DATA (info, p)) \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
floatformat_to_double (& floatformat_ieee_single_big, \
(char *) p - 4, & val); \
} \
do \
{ \
p += 8; \
- if (FETCH_DATA (info, p) , 0) \
- return -3; \
+ if (!FETCH_DATA (info, p)) \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
floatformat_to_double (& floatformat_ieee_double_big, \
(char *) p - 8, & val); \
} \
do \
{ \
p += 12; \
- if (FETCH_DATA (info, p) < 0) \
- return -3; \
+ if (!FETCH_DATA (info, p)) \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
floatformat_to_double (& floatformat_m68881_ext, \
(char *) p - 12, & val); \
} \
do \
{ \
p += 12; \
- if (FETCH_DATA (info, p) < 0) \
- return -3; \
+ if (!FETCH_DATA (info, p)) \
+ return PRINT_INSN_ARG_MEMORY_ERROR; \
val = 0.0; \
} \
while (0)
/* Maximum length of an instruction. */
#define MAXLEN 22
-#include <setjmp.h>
-
struct private
{
/* Points to first byte not fetched. */
bfd_vma insn_start;
};
-static fprintf_ftype save_printer;
-static void (* save_print_address) (bfd_vma, struct disassemble_info *);
-
/* 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)))
if (status != 0)
{
(*info->memory_error_func) (status, start, info);
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
return 0;
}
else
{ \
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,
{
static char *const cacheFieldName[] = { "nc", "dc", "ic", "bc" };
FETCH_ARG (2, val);
- (*info->fprintf_func) (info->stream, cacheFieldName[val]);
+ (*info->fprintf_func) (info->stream, "%s", cacheFieldName[val]);
break;
}
case 'J':
{
/* FIXME: There's a problem here, different m68k processors call the
- same address different names. This table can't get it right
- because it doesn't know which processor it's disassembling for. */
- static const struct { char *name; int value; } names[]
- = {{"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
- {"%tc", 0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
- {"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
- {"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
- {"%msp", 0x803}, {"%isp", 0x804},
- /* reg c04 is sometimes called flashbar or rambar.
- rec c05 is also sometimes called rambar. */
- {"%rambar0", 0xc04}, {"%rambar1", 0xc05},
-
- /* Should we be calling this psr like we do in case 'Y'? */
- {"%mmusr",0x805},
-
- {"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808},
-
- /* Fido added these. */
- {"%cac", 0xffe}, {"%mbo", 0xfff}};
+ same address different names. The tables below try to get it right
+ using info->mach, but only for v4e. */
+ struct regname { char * name; int value; };
+ static const struct regname names[] =
+ {
+ {"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
+ {"%tc", 0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
+ {"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
+ {"%rgpiobar", 0x009}, {"%acr4",0x00c},
+ {"%acr5",0x00d}, {"%acr6",0x00e}, {"%acr7", 0x00f},
+ {"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
+ {"%msp", 0x803}, {"%isp", 0x804},
+ {"%pc", 0x80f},
+ /* Reg c04 is sometimes called flashbar or rambar.
+ Reg c05 is also sometimes called rambar. */
+ {"%rambar0", 0xc04}, {"%rambar1", 0xc05},
+
+ /* reg c0e is sometimes called mbar2 or secmbar.
+ reg c0f is sometimes called mbar. */
+ {"%mbar0", 0xc0e}, {"%mbar1", 0xc0f},
+
+ /* Should we be calling this psr like we do in case 'Y'? */
+ {"%mmusr",0x805},
+
+ {"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808},
+
+ /* Fido added these. */
+ {"%cac", 0xffe}, {"%mbo", 0xfff}
+ };
+ /* Alternate names for v4e (MCF5407/5445x/MCF547x/MCF548x), at least. */
+ static const struct regname names_v4e[] =
+ {
+ {"%asid",0x003}, {"%acr0",0x004}, {"%acr1",0x005},
+ {"%acr2",0x006}, {"%acr3",0x007}, {"%mmubar",0x008},
+ };
+ unsigned int arch_mask;
+ arch_mask = bfd_m68k_mach_to_features (info->mach);
FETCH_ARG (12, val);
- for (regno = sizeof names / sizeof names[0] - 1; regno >= 0; regno--)
+ if (arch_mask & (mcfisa_b | mcfisa_c))
+ {
+ for (regno = ARRAY_SIZE (names_v4e); --regno >= 0;)
+ if (names_v4e[regno].value == val)
+ {
+ (*info->fprintf_func) (info->stream, "%s", names_v4e[regno].name);
+ break;
+ }
+ if (regno >= 0)
+ break;
+ }
+ for (regno = ARRAY_SIZE (names) - 1; regno >= 0; regno--)
if (names[regno].value == val)
{
(*info->fprintf_func) (info->stream, "%s", names[regno].name);
break;
}
if (regno < 0)
- (*info->fprintf_func) (info->stream, "%d", val);
+ (*info->fprintf_func) (info->stream, "0x%x", val);
}
break;
static char *const scalefactor_name[] = { "<<", ">>" };
FETCH_ARG (1, val);
- (*info->fprintf_func) (info->stream, scalefactor_name[val]);
+ (*info->fprintf_func) (info->stream, "%s", scalefactor_name[val]);
}
else
{
(*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, "#%g", flval);
+ (*info->fprintf_func) (info->stream, "#0e%g", flval);
else
(*info->fprintf_func) (info->stream, "#%d", val);
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':
case '2':
case '3':
{
- int val;
char *name = 0;
FETCH_ARG (5, val);
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,
if (*args == '.')
args++;
-
+
/* Point at first word of argument data,
and at descriptor for first argument. */
p = buffer + 2;
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)
+ 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 if (eaten == -3)
- return 0;
else
{
/* We must restore the print functions before trying to print the
/* 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++)
}
}
return 0;
-}
+}
/* Print the m68k instruction at address MEMADDR in debugged memory,
on INFO->STREAM. Returns length of the instruction, in bytes. */
int
print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
{
- fprintf_ftype save_printer;
- void (* save_print_address) (bfd_vma, struct disassemble_info *);
unsigned int arch_mask;
struct private priv;
int val;
bfd_byte *buffer = priv.the_buffer;
- /* Save these printing functions in case we need to restore them
- later. */
- save_printer = info->fprintf_func;
- save_print_address = info->print_address_func;
-
info->private_data = & priv;
/* Tell objdump to use two bytes per chunk
and six bytes per line for displaying raw data. */
/* 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
if (val == 0)
/* Handle undefined instructions. */
- info->fprintf_func (info->stream, "0%o", (buffer[0] << 8) + buffer[1]);
-
- /* Restore print functions. */
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
+ info->fprintf_func (info->stream, ".short 0x%04x", (buffer[0] << 8) + buffer[1]);
return val ? val : 2;
}
projects / deliverable / binutils-gdb.git / blobdiff