/* Disassembler code for Renesas RL78.
Copyright (C) 2011-2020 Free Software Foundation, Inc.
Contributed by Red Hat.
Written by DJ Delorie.
This file is part of the GNU opcodes library.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include <stdio.h>
#include "bfd.h"
#include "elf-bfd.h"
#include "disassemble.h"
#include "opcode/rl78.h"
#include "elf/rl78.h"
#include <setjmp.h>
#define DEBUG_SEMANTICS 0
typedef struct
{
bfd_vma pc;
disassemble_info * dis;
} RL78_Data;
struct private
{
OPCODES_SIGJMP_BUF bailout;
};
static int
rl78_get_byte (void * vdata)
{
bfd_byte buf[1];
RL78_Data *rl78_data = (RL78_Data *) vdata;
int status;
status = rl78_data->dis->read_memory_func (rl78_data->pc,
buf,
1,
rl78_data->dis);
if (status != 0)
{
struct private *priv = (struct private *) rl78_data->dis->private_data;
rl78_data->dis->memory_error_func (status, rl78_data->pc,
rl78_data->dis);
OPCODES_SIGLONGJMP (priv->bailout, 1);
}
rl78_data->pc ++;
return buf[0];
}
static char const *
register_names[] =
{
"",
"x", "a", "c", "b", "e", "d", "l", "h",
"ax", "bc", "de", "hl",
"sp", "psw", "cs", "es", "pmc", "mem"
};
static char const *
condition_names[] =
{
"t", "f", "c", "nc", "h", "nh", "z", "nz"
};
static int
indirect_type (int t)
{
switch (t)
{
case RL78_Operand_Indirect:
case RL78_Operand_BitIndirect:
case RL78_Operand_PostInc:
case RL78_Operand_PreDec:
return 1;
default:
return 0;
}
}
static int
print_insn_rl78_common (bfd_vma addr, disassemble_info * dis, RL78_Dis_Isa isa)
{
int rv;
RL78_Data rl78_data;
RL78_Opcode_Decoded opcode;
const char * s;
#if DEBUG_SEMANTICS
static char buf[200];
#endif
struct private priv;
dis->private_data = (PTR) &priv;
rl78_data.pc = addr;
rl78_data.dis = dis;
if (OPCODES_SIGSETJMP (priv.bailout) != 0)
{
/* Error return. */
return -1;
}
rv = rl78_decode_opcode (addr, &opcode, rl78_get_byte, &rl78_data, isa);
dis->bytes_per_line = 10;
#define PR (dis->fprintf_func)
#define PS (dis->stream)
#define PC(c) PR (PS, "%c", c)
s = opcode.syntax;
#if DEBUG_SEMANTICS
switch (opcode.id)
{
case RLO_unknown: s = "uknown"; break;
case RLO_add: s = "add: %e0%0 += %e1%1"; break;
case RLO_addc: s = "addc: %e0%0 += %e1%1 + CY"; break;
case RLO_and: s = "and: %e0%0 &= %e1%1"; break;
case RLO_branch: s = "branch: pc = %e0%0"; break;
case RLO_branch_cond: s = "branch_cond: pc = %e0%0 if %c1 / %e1%1"; break;
case RLO_branch_cond_clear: s = "branch_cond_clear: pc = %e0%0 if %c1 / %e1%1, %e1%1 = 0"; break;
case RLO_call: s = "call: pc = %e1%0"; break;
case RLO_cmp: s = "cmp: %e0%0 - %e1%1"; break;
case RLO_mov: s = "mov: %e0%0 = %e1%1"; break;
case RLO_or: s = "or: %e0%0 |= %e1%1"; break;
case RLO_rol: s = "rol: %e0%0 <<= %e1%1"; break;
case RLO_rolc: s = "rol: %e0%0 <<= %e1%1,CY"; break;
case RLO_ror: s = "ror: %e0%0 >>= %e1%1"; break;
case RLO_rorc: s = "ror: %e0%0 >>= %e1%1,CY"; break;
case RLO_sar: s = "sar: %e0%0 >>= %e1%1 signed"; break;
case RLO_sel: s = "sel: rb = %1"; break;
case RLO_shr: s = "shr: %e0%0 >>= %e1%1 unsigned"; break;
case RLO_shl: s = "shl: %e0%0 <<= %e1%1"; break;
case RLO_skip: s = "skip: if %c1"; break;
case RLO_sub: s = "sub: %e0%0 -= %e1%1"; break;
case RLO_subc: s = "subc: %e0%0 -= %e1%1 - CY"; break;
case RLO_xch: s = "xch: %e0%0 <-> %e1%1"; break;
case RLO_xor: s = "xor: %e0%0 ^= %e1%1"; break;
}
sprintf(buf, "%s%%W%%f\t\033[32m%s\033[0m", s, opcode.syntax);
s = buf;
#endif
for (; *s; s++)
{
if (*s != '%')
{
PC (*s);
}
else
{
RL78_Opcode_Operand * oper;
int do_hex = 0;
int do_addr = 0;
int do_es = 0;
int do_sfr = 0;
int do_cond = 0;
int do_bang = 0;
while (1)
{
s ++;
switch (*s)
{
case 'x':
do_hex = 1;
break;
case '!':
do_bang = 1;
break;
case 'e':
do_es = 1;
break;
case 'a':
do_addr = 1;
break;
case 's':
do_sfr = 1;
break;
case 'c':
do_cond = 1;
break;
default:
goto no_more_modifiers;
}
}
no_more_modifiers:;
switch (*s)
{
case '%':
PC ('%');
break;
#if DEBUG_SEMANTICS
case 'W':
if (opcode.size == RL78_Word)
PR (PS, " \033[33mW\033[0m");
break;
case 'f':
if (opcode.flags)
{
char *comma = "";
PR (PS, " \033[35m");
if (opcode.flags & RL78_PSW_Z)
{ PR (PS, "Z"); comma = ","; }
if (opcode.flags & RL78_PSW_AC)
{ PR (PS, "%sAC", comma); comma = ","; }
if (opcode.flags & RL78_PSW_CY)
{ PR (PS, "%sCY", comma); comma = ","; }
PR (PS, "\033[0m");
}
break;
#endif
case '0':
case '1':
oper = *s == '0' ? &opcode.op[0] : &opcode.op[1];
if (do_es)
{
if (oper->use_es && indirect_type (oper->type))
PR (PS, "es:");
}
if (do_bang)
{
/* If we are going to display SP by name, we must omit the bang. */
if ((oper->type == RL78_Operand_Indirect
|| oper->type == RL78_Operand_BitIndirect)
&& oper->reg == RL78_Reg_None
&& do_sfr
&& ((oper->addend == 0xffff8 && opcode.size == RL78_Word)
|| (oper->addend == 0x0fff8 && do_es && opcode.size == RL78_Word)))
;
else
PC ('!');
}
if (do_cond)
{
PR (PS, "%s", condition_names[oper->condition]);
break;
}
switch (oper->type)
{
case RL78_Operand_Immediate:
if (do_addr)
dis->print_address_func (oper->addend, dis);
else if (do_hex
|| oper->addend > 999
|| oper->addend < -999)
PR (PS, "%#x", oper->addend);
else
PR (PS, "%d", oper->addend);
break;
case RL78_Operand_Register:
PR (PS, "%s", register_names[oper->reg]);
break;
case RL78_Operand_Bit:
PR (PS, "%s.%d", register_names[oper->reg], oper->bit_number);
break;
case RL78_Operand_Indirect:
case RL78_Operand_BitIndirect:
switch (oper->reg)
{
case RL78_Reg_None:
if (oper->addend == 0xffffa && do_sfr && opcode.size == RL78_Byte)
PR (PS, "psw");
else if (oper->addend == 0xffff8 && do_sfr && opcode.size == RL78_Word)
PR (PS, "sp");
else if (oper->addend == 0x0fff8 && do_sfr && do_es && opcode.size == RL78_Word)
PR (PS, "sp");
else if (oper->addend == 0xffff8 && do_sfr && opcode.size == RL78_Byte)
PR (PS, "spl");
else if (oper->addend == 0xffff9 && do_sfr && opcode.size == RL78_Byte)
PR (PS, "sph");
else if (oper->addend == 0xffffc && do_sfr && opcode.size == RL78_Byte)
PR (PS, "cs");
else if (oper->addend == 0xffffd && do_sfr && opcode.size == RL78_Byte)
PR (PS, "es");
else if (oper->addend == 0xffffe && do_sfr && opcode.size == RL78_Byte)
PR (PS, "pmc");
else if (oper->addend == 0xfffff && do_sfr && opcode.size == RL78_Byte)
PR (PS, "mem");
else if (oper->addend >= 0xffe20)
PR (PS, "%#x", oper->addend);
else
{
int faddr = oper->addend;
if (do_es && ! oper->use_es)
faddr += 0xf0000;
dis->print_address_func (faddr, dis);
}
break;
case RL78_Reg_B:
case RL78_Reg_C:
case RL78_Reg_BC:
PR (PS, "%d[%s]", oper->addend, register_names[oper->reg]);
break;
default:
PR (PS, "[%s", register_names[oper->reg]);
if (oper->reg2 != RL78_Reg_None)
PR (PS, "+%s", register_names[oper->reg2]);
if (oper->addend || do_addr)
PR (PS, "+%d", oper->addend);
PC (']');
break;
}
if (oper->type == RL78_Operand_BitIndirect)
PR (PS, ".%d", oper->bit_number);
break;
#if DEBUG_SEMANTICS
/* Shouldn't happen - push and pop don't print
[SP] directly. But we *do* use them for
semantic debugging. */
case RL78_Operand_PostInc:
PR (PS, "[%s++]", register_names[oper->reg]);
break;
case RL78_Operand_PreDec:
PR (PS, "[--%s]", register_names[oper->reg]);
break;
#endif
default:
/* If we ever print this, that means the
programmer tried to print an operand with a
type we don't expect. Print the line and
operand number from rl78-decode.opc for
them. */
PR (PS, "???%d.%d", opcode.lineno, *s - '0');
break;
}
}
}
}
#if DEBUG_SEMANTICS
PR (PS, "\t\033[34m(line %d)\033[0m", opcode.lineno);
#endif
return rv;
}
int
print_insn_rl78 (bfd_vma addr, disassemble_info * dis)
{
return print_insn_rl78_common (addr, dis, RL78_ISA_DEFAULT);
}
int
print_insn_rl78_g10 (bfd_vma addr, disassemble_info * dis)
{
return print_insn_rl78_common (addr, dis, RL78_ISA_G10);
}
int
print_insn_rl78_g13 (bfd_vma addr, disassemble_info * dis)
{
return print_insn_rl78_common (addr, dis, RL78_ISA_G13);
}
int
print_insn_rl78_g14 (bfd_vma addr, disassemble_info * dis)
{
return print_insn_rl78_common (addr, dis, RL78_ISA_G14);
}
disassembler_ftype
rl78_get_disassembler (bfd *abfd)
{
int cpu = E_FLAG_RL78_ANY_CPU;
if (abfd != NULL)
cpu = abfd->tdata.elf_obj_data->elf_header->e_flags & E_FLAG_RL78_CPU_MASK;
switch (cpu)
{
case E_FLAG_RL78_G10:
return print_insn_rl78_g10;
case E_FLAG_RL78_G13:
return print_insn_rl78_g13;
case E_FLAG_RL78_G14:
return print_insn_rl78_g14;
default:
return print_insn_rl78;
}
}
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