#include <setjmp.h>
#include <string.h>
#include "sysdep.h"
#include "opcode/vax.h"
#include "dis-asm.h"
static char *reg_names[] =
{
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc"
};
static char *entry_mask_bit[] =
{
"~r0~", "~r1~",
"r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11",
"~ap~", "~fp~",
"IntOvfl", "DecOvfl",
};
#define COERCE_SIGNED_CHAR(ch) ((signed char)(ch))
#define NEXTBYTE(p) \
(p += 1, FETCH_DATA (info, p), \
COERCE_SIGNED_CHAR(p[-1]))
#define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
#define NEXTWORD(p) \
(p += 2, FETCH_DATA (info, p), \
COERCE16 ((p[-1] << 8) + p[-2]))
#define COERCE32(x) ((int) (((x) ^ 0x80000000) - 0x80000000))
#define NEXTLONG(p) \
(p += 4, FETCH_DATA (info, p), \
(COERCE32 ((((((p[-1] << 8) + p[-2]) << 8) + p[-3]) << 8) + p[-4])))
#define MAXLEN 25
struct private
{
bfd_byte * max_fetched;
bfd_byte the_buffer[MAXLEN];
bfd_vma insn_start;
jmp_buf bailout;
};
#define FETCH_DATA(info, addr) \
((addr) <= ((struct private *)(info->private_data))->max_fetched \
? 1 : fetch_data ((info), (addr)))
static int
fetch_data (struct disassemble_info *info, bfd_byte *addr)
{
int status;
struct private *priv = (struct private *) info->private_data;
bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
status = (*info->read_memory_func) (start,
priv->max_fetched,
addr - priv->max_fetched,
info);
if (status != 0)
{
(*info->memory_error_func) (status, start, info);
longjmp (priv->bailout, 1);
}
else
priv->max_fetched = addr;
return 1;
}
static unsigned int entry_addr_occupied_slots = 0;
static unsigned int entry_addr_total_slots = 0;
static bfd_vma * entry_addr = NULL;
static bfd_boolean
parse_disassembler_options (char * options)
{
const char * entry_switch = "entry:";
while ((options = strstr (options, entry_switch)))
{
options += strlen (entry_switch);
if (entry_addr_occupied_slots >= entry_addr_total_slots)
{
entry_addr_total_slots +=
strlen (options) / (strlen (entry_switch) + 5);
entry_addr = realloc (entry_addr, sizeof (bfd_vma)
* entry_addr_total_slots);
}
if (entry_addr == NULL)
return FALSE;
entry_addr[entry_addr_occupied_slots] = bfd_scan_vma (options, NULL, 0);
entry_addr_occupied_slots ++;
}
return TRUE;
}
#if 0
static void
free_entry_array (void)
{
if (entry_addr)
{
free (entry_addr);
entry_addr = NULL;
entry_addr_occupied_slots = entry_addr_total_slots = 0;
}
}
#endif
static bfd_boolean
is_function_entry (struct disassemble_info *info, bfd_vma addr)
{
unsigned int i;
if (info->symbols
&& info->symbols[0]
&& (info->symbols[0]->flags & BSF_FUNCTION)
&& addr == bfd_asymbol_value (info->symbols[0]))
return TRUE;
for (i = entry_addr_occupied_slots; i--;)
if (entry_addr[i] == addr)
return TRUE;
return FALSE;
}
static int
print_insn_mode (const char *d,
int size,
unsigned char *p0,
bfd_vma addr,
disassemble_info *info)
{
unsigned char *p = p0;
unsigned char mode, reg;
mode = (unsigned char) NEXTBYTE (p);
reg = mode & 0xF;
switch (mode & 0xF0)
{
case 0x00:
case 0x10:
case 0x20:
case 0x30:
if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
(*info->fprintf_func) (info->stream, "$0x%x [%c-float]", mode, d[1]);
else
(*info->fprintf_func) (info->stream, "$0x%x", mode);
break;
case 0x40:
p += print_insn_mode (d, size, p0 + 1, addr + 1, info);
(*info->fprintf_func) (info->stream, "[%s]", reg_names[reg]);
break;
case 0x50:
(*info->fprintf_func) (info->stream, "%s", reg_names[reg]);
break;
case 0x60:
(*info->fprintf_func) (info->stream, "(%s)", reg_names[reg]);
break;
case 0x70:
(*info->fprintf_func) (info->stream, "-(%s)", reg_names[reg]);
break;
case 0x80:
if (reg == 0xF)
{
int i;
FETCH_DATA (info, p + size);
(*info->fprintf_func) (info->stream, "$0x");
if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
{
int float_word;
float_word = p[0] | (p[1] << 8);
if ((d[1] == 'd' || d[1] == 'f')
&& (float_word & 0xff80) == 0x8000)
{
(*info->fprintf_func) (info->stream, "[invalid %c-float]",
d[1]);
}
else
{
for (i = 0; i < size; i++)
(*info->fprintf_func) (info->stream, "%02x",
p[size - i - 1]);
(*info->fprintf_func) (info->stream, " [%c-float]", d[1]);
}
}
else
{
for (i = 0; i < size; i++)
(*info->fprintf_func) (info->stream, "%02x", p[size - i - 1]);
}
p += size;
}
else
(*info->fprintf_func) (info->stream, "(%s)+", reg_names[reg]);
break;
case 0x90:
if (reg == 0xF)
(*info->fprintf_func) (info->stream, "*0x%x", NEXTLONG (p));
else
(*info->fprintf_func) (info->stream, "@(%s)+", reg_names[reg]);
break;
case 0xB0:
(*info->fprintf_func) (info->stream, "*");
case 0xA0:
if (reg == 0xF)
(*info->print_address_func) (addr + 2 + NEXTBYTE (p), info);
else
(*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTBYTE (p),
reg_names[reg]);
break;
case 0xD0:
(*info->fprintf_func) (info->stream, "*");
case 0xC0:
if (reg == 0xF)
(*info->print_address_func) (addr + 3 + NEXTWORD (p), info);
else
(*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTWORD (p),
reg_names[reg]);
break;
case 0xF0:
(*info->fprintf_func) (info->stream, "*");
case 0xE0:
if (reg == 0xF)
(*info->print_address_func) (addr + 5 + NEXTLONG (p), info);
else
(*info->fprintf_func) (info->stream, "0x%x(%s)", NEXTLONG (p),
reg_names[reg]);
break;
}
return p - p0;
}
static int
print_insn_arg (const char *d,
unsigned char *p0,
bfd_vma addr,
disassemble_info *info)
{
int arg_len;
switch (d[1])
{
case 'b' : arg_len = 1; break;
case 'd' : arg_len = 8; break;
case 'f' : arg_len = 4; break;
case 'g' : arg_len = 8; break;
case 'h' : arg_len = 16; break;
case 'l' : arg_len = 4; break;
case 'o' : arg_len = 16; break;
case 'w' : arg_len = 2; break;
case 'q' : arg_len = 8; break;
default : abort ();
}
if (d[0] == 'b')
{
unsigned char *p = p0;
if (arg_len == 1)
(*info->print_address_func) (addr + 1 + NEXTBYTE (p), info);
else
(*info->print_address_func) (addr + 2 + NEXTWORD (p), info);
return p - p0;
}
return print_insn_mode (d, arg_len, p0, addr, info);
}
int
print_insn_vax (bfd_vma memaddr, disassemble_info *info)
{
static bfd_boolean parsed_disassembler_options = FALSE;
const struct vot *votp;
const char *argp;
unsigned char *arg;
struct private priv;
bfd_byte *buffer = priv.the_buffer;
info->private_data = & priv;
priv.max_fetched = priv.the_buffer;
priv.insn_start = memaddr;
if (! parsed_disassembler_options
&& info->disassembler_options != NULL)
{
parse_disassembler_options (info->disassembler_options);
parsed_disassembler_options = TRUE;
}
if (setjmp (priv.bailout) != 0)
return -1;
argp = NULL;
if (info->buffer_length - (memaddr - info->buffer_vma) > 1)
{
FETCH_DATA (info, buffer + 2);
}
else
{
FETCH_DATA (info, buffer + 1);
buffer[1] = 0;
}
if (is_function_entry (info, memaddr))
{
int i = 0;
int register_mask = buffer[1] << 8 | buffer[0];
(*info->fprintf_func) (info->stream, ".word 0x%04x # Entry mask: <",
register_mask);
for (i = 15; i >= 0; i--)
if (register_mask & (1 << i))
(*info->fprintf_func) (info->stream, " %s", entry_mask_bit[i]);
(*info->fprintf_func) (info->stream, " >");
return 2;
}
for (votp = &votstrs[0]; votp->name[0]; votp++)
{
vax_opcodeT opcode = votp->detail.code;
if ((bfd_byte) opcode == buffer[0]
&& (opcode >> 8 == 0 || opcode >> 8 == buffer[1]))
{
argp = votp->detail.args;
break;
}
}
if (argp == NULL)
{
(*info->fprintf_func) (info->stream, ".word 0x%x",
(buffer[0] << 8) + buffer[1]);
return 2;
}
arg = buffer + ((votp->detail.code >> 8) ? 2 : 1);
FETCH_DATA (info, arg);
(*info->fprintf_func) (info->stream, "%s", votp->name);
if (*argp)
(*info->fprintf_func) (info->stream, " ");
while (*argp)
{
arg += print_insn_arg (argp, arg, memaddr + arg - buffer, info);
argp += 2;
if (*argp)
(*info->fprintf_func) (info->stream, ",");
}
return arg - buffer;
}