/* ppc-dis.c -- Disassemble PowerPC instructions
Copyright (C) 1994-2020 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support
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 file; see the file COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include <stdio.h>
#include "disassemble.h"
#include "elf-bfd.h"
#include "elf/ppc.h"
#include "opintl.h"
#include "opcode/ppc.h"
#include "libiberty.h"
/* This file provides several disassembler functions, all of which use
the disassembler interface defined in dis-asm.h. Several functions
are provided because this file handles disassembly for the PowerPC
in both big and little endian mode and also for the POWER (RS/6000)
chip. */
static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int,
ppc_cpu_t);
struct dis_private
{
/* Stash the result of parsing disassembler_options here. */
ppc_cpu_t dialect;
};
#define POWERPC_DIALECT(INFO) \
(((struct dis_private *) ((INFO)->private_data))->dialect)
struct ppc_mopt {
/* Option string, without -m or -M prefix. */
const char *opt;
/* CPU option flags. */
ppc_cpu_t cpu;
/* Flags that should stay on, even when combined with another cpu
option. This should only be used for generic options like
"-many" or "-maltivec" where it is reasonable to add some
capability to another cpu selection. The added flags are sticky
so that, for example, "-many -me500" and "-me500 -many" result in
the same assembler or disassembler behaviour. Do not use
"sticky" for specific cpus, as this will prevent that cpu's flags
from overriding the defaults set in powerpc_init_dialect or a
prior -m option. */
ppc_cpu_t sticky;
};
struct ppc_mopt ppc_opts[] = {
{ "403", PPC_OPCODE_PPC | PPC_OPCODE_403,
0 },
{ "405", PPC_OPCODE_PPC | PPC_OPCODE_403 | PPC_OPCODE_405,
0 },
{ "440", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_440
| PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI),
0 },
{ "464", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_440
| PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI),
0 },
{ "476", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_476
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5),
0 },
{ "601", PPC_OPCODE_PPC | PPC_OPCODE_601,
0 },
{ "603", PPC_OPCODE_PPC,
0 },
{ "604", PPC_OPCODE_PPC,
0 },
{ "620", PPC_OPCODE_PPC | PPC_OPCODE_64,
0 },
{ "7400", PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC,
0 },
{ "7410", PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC,
0 },
{ "7450", PPC_OPCODE_PPC | PPC_OPCODE_7450 | PPC_OPCODE_ALTIVEC,
0 },
{ "7455", PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC,
0 },
{ "750cl", PPC_OPCODE_PPC | PPC_OPCODE_750 | PPC_OPCODE_PPCPS
, 0 },
{ "gekko", PPC_OPCODE_PPC | PPC_OPCODE_750 | PPC_OPCODE_PPCPS
, 0 },
{ "broadway", PPC_OPCODE_PPC | PPC_OPCODE_750 | PPC_OPCODE_PPCPS
, 0 },
{ "821", PPC_OPCODE_PPC | PPC_OPCODE_860,
0 },
{ "850", PPC_OPCODE_PPC | PPC_OPCODE_860,
0 },
{ "860", PPC_OPCODE_PPC | PPC_OPCODE_860,
0 },
{ "a2", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5 | PPC_OPCODE_CACHELCK | PPC_OPCODE_64
| PPC_OPCODE_A2),
0 },
{ "altivec", PPC_OPCODE_PPC,
PPC_OPCODE_ALTIVEC },
{ "any", PPC_OPCODE_PPC,
PPC_OPCODE_ANY },
{ "booke", PPC_OPCODE_PPC | PPC_OPCODE_BOOKE,
0 },
{ "booke32", PPC_OPCODE_PPC | PPC_OPCODE_BOOKE,
0 },
{ "cell", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC),
0 },
{ "com", PPC_OPCODE_COMMON,
0 },
{ "e200z4", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE| PPC_OPCODE_SPE
| PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500 | PPC_OPCODE_VLE | PPC_OPCODE_E200Z4
| PPC_OPCODE_EFS2 | PPC_OPCODE_LSP),
0 },
{ "e300", PPC_OPCODE_PPC | PPC_OPCODE_E300,
0 },
{ "e500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500),
0 },
{ "e500mc", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500MC),
0 },
{ "e500mc64", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_POWER5
| PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
0 },
{ "e5500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
0 },
{ "e6500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_ALTIVEC
| PPC_OPCODE_E6500 | PPC_OPCODE_TMR | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
0 },
{ "e500x2", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500),
0 },
{ "efs", PPC_OPCODE_PPC | PPC_OPCODE_EFS,
0 },
{ "efs2", PPC_OPCODE_PPC | PPC_OPCODE_EFS | PPC_OPCODE_EFS2,
0 },
{ "power4", PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4,
0 },
{ "power5", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5),
0 },
{ "power6", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC),
0 },
{ "power7", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "power8", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8
| PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "power9", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
| PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "power10", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
| PPC_OPCODE_POWER10 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "future", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
| PPC_OPCODE_POWER10 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "ppc", PPC_OPCODE_PPC,
0 },
{ "ppc32", PPC_OPCODE_PPC,
0 },
{ "32", PPC_OPCODE_PPC,
0 },
{ "ppc64", PPC_OPCODE_PPC | PPC_OPCODE_64,
0 },
{ "64", PPC_OPCODE_PPC | PPC_OPCODE_64,
0 },
{ "ppc64bridge", PPC_OPCODE_PPC | PPC_OPCODE_64_BRIDGE,
0 },
{ "ppcps", PPC_OPCODE_PPC | PPC_OPCODE_PPCPS,
0 },
{ "pwr", PPC_OPCODE_POWER,
0 },
{ "pwr2", PPC_OPCODE_POWER | PPC_OPCODE_POWER2,
0 },
{ "pwr4", PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4,
0 },
{ "pwr5", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5),
0 },
{ "pwr5x", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5),
0 },
{ "pwr6", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC),
0 },
{ "pwr7", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "pwr8", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8
| PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "pwr9", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
| PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "pwr10", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
| PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
| PPC_OPCODE_POWER10 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
0 },
{ "pwrx", PPC_OPCODE_POWER | PPC_OPCODE_POWER2,
0 },
{ "raw", PPC_OPCODE_PPC,
PPC_OPCODE_RAW },
{ "spe", PPC_OPCODE_PPC | PPC_OPCODE_EFS,
PPC_OPCODE_SPE },
{ "spe2", PPC_OPCODE_PPC | PPC_OPCODE_EFS | PPC_OPCODE_EFS2 | PPC_OPCODE_SPE,
PPC_OPCODE_SPE2 },
{ "titan", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_PMR
| PPC_OPCODE_RFMCI | PPC_OPCODE_TITAN),
0 },
{ "vle", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE| PPC_OPCODE_SPE
| PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
| PPC_OPCODE_LSP | PPC_OPCODE_EFS2 | PPC_OPCODE_SPE2),
PPC_OPCODE_VLE },
{ "vsx", PPC_OPCODE_PPC,
PPC_OPCODE_VSX },
};
/* Switch between Booke and VLE dialects for interlinked dumps. */
static ppc_cpu_t
get_powerpc_dialect (struct disassemble_info *info)
{
ppc_cpu_t dialect = 0;
if (info->private_data)
dialect = POWERPC_DIALECT (info);
/* Disassemble according to the section headers flags for VLE-mode. */
if (dialect & PPC_OPCODE_VLE
&& info->section != NULL && info->section->owner != NULL
&& bfd_get_flavour (info->section->owner) == bfd_target_elf_flavour
&& elf_object_id (info->section->owner) == PPC32_ELF_DATA
&& (elf_section_flags (info->section) & SHF_PPC_VLE) != 0)
return dialect;
else
return dialect & ~ PPC_OPCODE_VLE;
}
/* Handle -m and -M options that set cpu type, and .machine arg. */
ppc_cpu_t
ppc_parse_cpu (ppc_cpu_t ppc_cpu, ppc_cpu_t *sticky, const char *arg)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE (ppc_opts); i++)
if (disassembler_options_cmp (ppc_opts[i].opt, arg) == 0)
{
if (ppc_opts[i].sticky)
{
*sticky |= ppc_opts[i].sticky;
if ((ppc_cpu & ~*sticky) != 0)
break;
}
ppc_cpu = ppc_opts[i].cpu;
break;
}
if (i >= ARRAY_SIZE (ppc_opts))
return 0;
ppc_cpu |= *sticky;
return ppc_cpu;
}
/* Determine which set of machines to disassemble for. */
static void
powerpc_init_dialect (struct disassemble_info *info)
{
ppc_cpu_t dialect = 0;
ppc_cpu_t sticky = 0;
struct dis_private *priv = calloc (sizeof (*priv), 1);
if (priv == NULL)
return;
switch (info->mach)
{
case bfd_mach_ppc_403:
case bfd_mach_ppc_403gc:
dialect = ppc_parse_cpu (dialect, &sticky, "403");
break;
case bfd_mach_ppc_405:
dialect = ppc_parse_cpu (dialect, &sticky, "405");
break;
case bfd_mach_ppc_601:
dialect = ppc_parse_cpu (dialect, &sticky, "601");
break;
case bfd_mach_ppc_750:
dialect = ppc_parse_cpu (dialect, &sticky, "750cl");
break;
case bfd_mach_ppc_a35:
case bfd_mach_ppc_rs64ii:
case bfd_mach_ppc_rs64iii:
dialect = ppc_parse_cpu (dialect, &sticky, "pwr2") | PPC_OPCODE_64;
break;
case bfd_mach_ppc_e500:
dialect = ppc_parse_cpu (dialect, &sticky, "e500");
break;
case bfd_mach_ppc_e500mc:
dialect = ppc_parse_cpu (dialect, &sticky, "e500mc");
break;
case bfd_mach_ppc_e500mc64:
dialect = ppc_parse_cpu (dialect, &sticky, "e500mc64");
break;
case bfd_mach_ppc_e5500:
dialect = ppc_parse_cpu (dialect, &sticky, "e5500");
break;
case bfd_mach_ppc_e6500:
dialect = ppc_parse_cpu (dialect, &sticky, "e6500");
break;
case bfd_mach_ppc_titan:
dialect = ppc_parse_cpu (dialect, &sticky, "titan");
break;
case bfd_mach_ppc_vle:
dialect = ppc_parse_cpu (dialect, &sticky, "vle");
break;
default:
if (info->arch == bfd_arch_powerpc)
dialect = ppc_parse_cpu (dialect, &sticky, "power10") | PPC_OPCODE_ANY;
else
dialect = ppc_parse_cpu (dialect, &sticky, "pwr");
break;
}
const char *opt;
FOR_EACH_DISASSEMBLER_OPTION (opt, info->disassembler_options)
{
ppc_cpu_t new_cpu = 0;
if (disassembler_options_cmp (opt, "32") == 0)
dialect &= ~(ppc_cpu_t) PPC_OPCODE_64;
else if (disassembler_options_cmp (opt, "64") == 0)
dialect |= PPC_OPCODE_64;
else if ((new_cpu = ppc_parse_cpu (dialect, &sticky, opt)) != 0)
dialect = new_cpu;
else
/* xgettext: c-format */
opcodes_error_handler (_("warning: ignoring unknown -M%s option"), opt);
}
info->private_data = priv;
POWERPC_DIALECT(info) = dialect;
}
#define PPC_OPCD_SEGS (1 + PPC_OP (-1))
static unsigned short powerpc_opcd_indices[PPC_OPCD_SEGS + 1];
#define PREFIX_OPCD_SEGS (1 + PPC_PREFIX_SEG (-1))
static unsigned short prefix_opcd_indices[PREFIX_OPCD_SEGS + 1];
#define VLE_OPCD_SEGS (1 + VLE_OP_TO_SEG (VLE_OP (-1, 0xffff)))
static unsigned short vle_opcd_indices[VLE_OPCD_SEGS + 1];
#define SPE2_OPCD_SEGS (1 + SPE2_XOP_TO_SEG (SPE2_XOP (-1)))
static unsigned short spe2_opcd_indices[SPE2_OPCD_SEGS + 1];
static bfd_boolean
ppc_symbol_is_valid (asymbol *sym,
struct disassemble_info *info ATTRIBUTE_UNUSED)
{
elf_symbol_type * est;
if (sym == NULL)
return FALSE;
est = elf_symbol_from (NULL, sym);
/* Ignore ELF hidden, local, no-type symbols.
These are generated by annobin. */
if (est != NULL
&& ELF_ST_VISIBILITY (est->internal_elf_sym.st_other) == STV_HIDDEN
&& ELF_ST_BIND (est->internal_elf_sym.st_info) == STB_LOCAL
&& ELF_ST_TYPE (est->internal_elf_sym.st_info) == STT_NOTYPE)
return FALSE;
return TRUE;
}
/* Calculate opcode table indices to speed up disassembly,
and init dialect. */
void
disassemble_init_powerpc (struct disassemble_info *info)
{
info->symbol_is_valid = ppc_symbol_is_valid;
if (powerpc_opcd_indices[PPC_OPCD_SEGS] == 0)
{
unsigned seg, idx, op;
/* PPC opcodes */
for (seg = 0, idx = 0; seg <= PPC_OPCD_SEGS; seg++)
{
powerpc_opcd_indices[seg] = idx;
for (; idx < powerpc_num_opcodes; idx++)
if (seg < PPC_OP (powerpc_opcodes[idx].opcode))
break;
}
/* 64-bit prefix opcodes */
for (seg = 0, idx = 0; seg <= PREFIX_OPCD_SEGS; seg++)
{
prefix_opcd_indices[seg] = idx;
for (; idx < prefix_num_opcodes; idx++)
if (seg < PPC_PREFIX_SEG (prefix_opcodes[idx].opcode))
break;
}
/* VLE opcodes */
for (seg = 0, idx = 0; seg <= VLE_OPCD_SEGS; seg++)
{
vle_opcd_indices[seg] = idx;
for (; idx < vle_num_opcodes; idx++)
{
op = VLE_OP (vle_opcodes[idx].opcode, vle_opcodes[idx].mask);
if (seg < VLE_OP_TO_SEG (op))
break;
}
}
/* SPE2 opcodes */
for (seg = 0, idx = 0; seg <= SPE2_OPCD_SEGS; seg++)
{
spe2_opcd_indices[seg] = idx;
for (; idx < spe2_num_opcodes; idx++)
{
op = SPE2_XOP (spe2_opcodes[idx].opcode);
if (seg < SPE2_XOP_TO_SEG (op))
break;
}
}
}
powerpc_init_dialect (info);
}
/* Print a big endian PowerPC instruction. */
int
print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
{
return print_insn_powerpc (memaddr, info, 1, get_powerpc_dialect (info));
}
/* Print a little endian PowerPC instruction. */
int
print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
{
return print_insn_powerpc (memaddr, info, 0, get_powerpc_dialect (info));
}
/* Extract the operand value from the PowerPC or POWER instruction. */
static int64_t
operand_value_powerpc (const struct powerpc_operand *operand,
uint64_t insn, ppc_cpu_t dialect)
{
int64_t value;
int invalid = 0;
/* Extract the value from the instruction. */
if (operand->extract)
value = (*operand->extract) (insn, dialect, &invalid);
else
{
if (operand->shift >= 0)
value = (insn >> operand->shift) & operand->bitm;
else
value = (insn << -operand->shift) & operand->bitm;
if ((operand->flags & PPC_OPERAND_SIGNED) != 0)
{
/* BITM is always some number of zeros followed by some
number of ones, followed by some number of zeros. */
uint64_t top = operand->bitm;
/* top & -top gives the rightmost 1 bit, so this
fills in any trailing zeros. */
top |= (top & -top) - 1;
top &= ~(top >> 1);
value = (value ^ top) - top;
}
}
return value;
}
/* Determine whether the optional operand(s) should be printed. */
static bfd_boolean
skip_optional_operands (const unsigned char *opindex,
uint64_t insn, ppc_cpu_t dialect)
{
const struct powerpc_operand *operand;
int num_optional;
for (num_optional = 0; *opindex != 0; opindex++)
{
operand = &powerpc_operands[*opindex];
if ((operand->flags & PPC_OPERAND_NEXT) != 0)
return FALSE;
if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0)
{
/* Negative count is used as a flag to extract function. */
--num_optional;
if (operand_value_powerpc (operand, insn, dialect)
!= ppc_optional_operand_value (operand, insn, dialect,
num_optional))
return FALSE;
}
}
return TRUE;
}
/* Find a match for INSN in the opcode table, given machine DIALECT. */
static const struct powerpc_opcode *
lookup_powerpc (uint64_t insn, ppc_cpu_t dialect)
{
const struct powerpc_opcode *opcode, *opcode_end, *last;
unsigned long op;
/* Get the major opcode of the instruction. */
op = PPC_OP (insn);
/* Find the first match in the opcode table for this major opcode. */
opcode_end = powerpc_opcodes + powerpc_opcd_indices[op + 1];
last = NULL;
for (opcode = powerpc_opcodes + powerpc_opcd_indices[op];
opcode < opcode_end;
++opcode)
{
const unsigned char *opindex;
const struct powerpc_operand *operand;
int invalid;
if ((insn & opcode->mask) != opcode->opcode
|| ((dialect & PPC_OPCODE_ANY) == 0
&& ((opcode->flags & dialect) == 0
|| (opcode->deprecated & dialect) != 0)))
continue;
/* Check validity of operands. */
invalid = 0;
for (opindex = opcode->operands; *opindex != 0; opindex++)
{
operand = powerpc_operands + *opindex;
if (operand->extract)
(*operand->extract) (insn, dialect, &invalid);
}
if (invalid)
continue;
if ((dialect & PPC_OPCODE_RAW) == 0)
return opcode;
/* The raw machine insn is one that is not a specialization. */
if (last == NULL
|| (last->mask & ~opcode->mask) != 0)
last = opcode;
}
return last;
}
/* Find a match for INSN in the PREFIX opcode table. */
static const struct powerpc_opcode *
lookup_prefix (uint64_t insn, ppc_cpu_t dialect)
{
const struct powerpc_opcode *opcode, *opcode_end, *last;
unsigned long seg;
/* Get the opcode segment of the instruction. */
seg = PPC_PREFIX_SEG (insn);
/* Find the first match in the opcode table for this major opcode. */
opcode_end = prefix_opcodes + prefix_opcd_indices[seg + 1];
last = NULL;
for (opcode = prefix_opcodes + prefix_opcd_indices[seg];
opcode < opcode_end;
++opcode)
{
const unsigned char *opindex;
const struct powerpc_operand *operand;
int invalid;
if ((insn & opcode->mask) != opcode->opcode
|| ((dialect & PPC_OPCODE_ANY) == 0
&& ((opcode->flags & dialect) == 0
|| (opcode->deprecated & dialect) != 0)))
continue;
/* Check validity of operands. */
invalid = 0;
for (opindex = opcode->operands; *opindex != 0; opindex++)
{
operand = powerpc_operands + *opindex;
if (operand->extract)
(*operand->extract) (insn, dialect, &invalid);
}
if (invalid)
continue;
if ((dialect & PPC_OPCODE_RAW) == 0)
return opcode;
/* The raw machine insn is one that is not a specialization. */
if (last == NULL
|| (last->mask & ~opcode->mask) != 0)
last = opcode;
}
return last;
}
/* Find a match for INSN in the VLE opcode table. */
static const struct powerpc_opcode *
lookup_vle (uint64_t insn)
{
const struct powerpc_opcode *opcode;
const struct powerpc_opcode *opcode_end;
unsigned op, seg;
op = PPC_OP (insn);
if (op >= 0x20 && op <= 0x37)
{
/* This insn has a 4-bit opcode. */
op &= 0x3c;
}
seg = VLE_OP_TO_SEG (op);
/* Find the first match in the opcode table for this major opcode. */
opcode_end = vle_opcodes + vle_opcd_indices[seg + 1];
for (opcode = vle_opcodes + vle_opcd_indices[seg];
opcode < opcode_end;
++opcode)
{
uint64_t table_opcd = opcode->opcode;
uint64_t table_mask = opcode->mask;
bfd_boolean table_op_is_short = PPC_OP_SE_VLE(table_mask);
uint64_t insn2;
const unsigned char *opindex;
const struct powerpc_operand *operand;
int invalid;
insn2 = insn;
if (table_op_is_short)
insn2 >>= 16;
if ((insn2 & table_mask) != table_opcd)
continue;
/* Check validity of operands. */
invalid = 0;
for (opindex = opcode->operands; *opindex != 0; ++opindex)
{
operand = powerpc_operands + *opindex;
if (operand->extract)
(*operand->extract) (insn, (ppc_cpu_t)0, &invalid);
}
if (invalid)
continue;
return opcode;
}
return NULL;
}
/* Find a match for INSN in the SPE2 opcode table. */
static const struct powerpc_opcode *
lookup_spe2 (uint64_t insn)
{
const struct powerpc_opcode *opcode, *opcode_end;
unsigned op, xop, seg;
op = PPC_OP (insn);
if (op != 0x4)
{
/* This is not SPE2 insn.
* All SPE2 instructions have OP=4 and differs by XOP */
return NULL;
}
xop = SPE2_XOP (insn);
seg = SPE2_XOP_TO_SEG (xop);
/* Find the first match in the opcode table for this major opcode. */
opcode_end = spe2_opcodes + spe2_opcd_indices[seg + 1];
for (opcode = spe2_opcodes + spe2_opcd_indices[seg];
opcode < opcode_end;
++opcode)
{
uint64_t table_opcd = opcode->opcode;
uint64_t table_mask = opcode->mask;
uint64_t insn2;
const unsigned char *opindex;
const struct powerpc_operand *operand;
int invalid;
insn2 = insn;
if ((insn2 & table_mask) != table_opcd)
continue;
/* Check validity of operands. */
invalid = 0;
for (opindex = opcode->operands; *opindex != 0; ++opindex)
{
operand = powerpc_operands + *opindex;
if (operand->extract)
(*operand->extract) (insn, (ppc_cpu_t)0, &invalid);
}
if (invalid)
continue;
return opcode;
}
return NULL;
}
/* Print a PowerPC or POWER instruction. */
static int
print_insn_powerpc (bfd_vma memaddr,
struct disassemble_info *info,
int bigendian,
ppc_cpu_t dialect)
{
bfd_byte buffer[4];
int status;
uint64_t insn;
const struct powerpc_opcode *opcode;
int insn_length = 4; /* Assume we have a normal 4-byte instruction. */
status = (*info->read_memory_func) (memaddr, buffer, 4, info);
/* The final instruction may be a 2-byte VLE insn. */
if (status != 0 && (dialect & PPC_OPCODE_VLE) != 0)
{
/* Clear buffer so unused bytes will not have garbage in them. */
buffer[2] = buffer[3] = 0;
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
insn_length = 2;
}
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
if (bigendian)
insn = bfd_getb32 (buffer);
else
insn = bfd_getl32 (buffer);
/* Get the major opcode of the insn. */
opcode = NULL;
if ((dialect & PPC_OPCODE_POWER10) != 0
&& PPC_OP (insn) == 0x1)
{
uint64_t temp_insn, suffix;
status = (*info->read_memory_func) (memaddr + 4, buffer, 4, info);
if (status == 0)
{
if (bigendian)
suffix = bfd_getb32 (buffer);
else
suffix = bfd_getl32 (buffer);
temp_insn = (insn << 32) | suffix;
opcode = lookup_prefix (temp_insn, dialect & ~PPC_OPCODE_ANY);
if (opcode == NULL && (dialect & PPC_OPCODE_ANY) != 0)
opcode = lookup_prefix (temp_insn, dialect);
if (opcode != NULL)
{
insn = temp_insn;
insn_length = 8;
if ((info->flags & WIDE_OUTPUT) != 0)
info->bytes_per_line = 8;
}
}
}
if (opcode == NULL && (dialect & PPC_OPCODE_VLE) != 0)
{
opcode = lookup_vle (insn);
if (opcode != NULL && PPC_OP_SE_VLE (opcode->mask))
{
/* The operands will be fetched out of the 16-bit instruction. */
insn >>= 16;
insn_length = 2;
}
}
if (opcode == NULL && insn_length == 4)
{
if ((dialect & PPC_OPCODE_SPE2) != 0)
opcode = lookup_spe2 (insn);
if (opcode == NULL)
opcode = lookup_powerpc (insn, dialect & ~PPC_OPCODE_ANY);
if (opcode == NULL && (dialect & PPC_OPCODE_ANY) != 0)
opcode = lookup_powerpc (insn, dialect);
}
if (opcode != NULL)
{
const unsigned char *opindex;
const struct powerpc_operand *operand;
enum {
need_comma = 0,
need_1space = 1,
need_2spaces = 2,
need_3spaces = 3,
need_4spaces = 4,
need_5spaces = 5,
need_6spaces = 6,
need_7spaces = 7,
need_paren
} op_separator;
bfd_boolean skip_optional;
int blanks;
(*info->fprintf_func) (info->stream, "%s", opcode->name);
/* gdb fprintf_func doesn't return count printed. */
blanks = 8 - strlen (opcode->name);
if (blanks <= 0)
blanks = 1;
/* Now extract and print the operands. */
op_separator = blanks;
skip_optional = FALSE;
for (opindex = opcode->operands; *opindex != 0; opindex++)
{
int64_t value;
operand = powerpc_operands + *opindex;
/* If all of the optional operands past this one have their
default value, then don't print any of them. Except in
raw mode, print them all. */
if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
&& (dialect & PPC_OPCODE_RAW) == 0)
{
if (!skip_optional)
skip_optional = skip_optional_operands (opindex, insn, dialect);
if (skip_optional)
continue;
}
value = operand_value_powerpc (operand, insn, dialect);
if (op_separator == need_comma)
(*info->fprintf_func) (info->stream, ",");
else if (op_separator == need_paren)
(*info->fprintf_func) (info->stream, "(");
else
(*info->fprintf_func) (info->stream, "%*s", op_separator, " ");
/* Print the operand as directed by the flags. */
if ((operand->flags & PPC_OPERAND_GPR) != 0
|| ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0))
(*info->fprintf_func) (info->stream, "r%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_FPR) != 0)
(*info->fprintf_func) (info->stream, "f%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_VR) != 0)
(*info->fprintf_func) (info->stream, "v%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_VSR) != 0)
(*info->fprintf_func) (info->stream, "vs%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_ACC) != 0)
(*info->fprintf_func) (info->stream, "a%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
(*info->print_address_func) (memaddr + value, info);
else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
(*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
else if ((operand->flags & PPC_OPERAND_FSL) != 0)
(*info->fprintf_func) (info->stream, "fsl%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_FCR) != 0)
(*info->fprintf_func) (info->stream, "fcr%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_UDI) != 0)
(*info->fprintf_func) (info->stream, "%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_CR_REG) != 0
&& (operand->flags & PPC_OPERAND_CR_BIT) == 0
&& (((dialect & PPC_OPCODE_PPC) != 0)
|| ((dialect & PPC_OPCODE_VLE) != 0)))
(*info->fprintf_func) (info->stream, "cr%" PRId64, value);
else if ((operand->flags & PPC_OPERAND_CR_BIT) != 0
&& (operand->flags & PPC_OPERAND_CR_REG) == 0
&& (((dialect & PPC_OPCODE_PPC) != 0)
|| ((dialect & PPC_OPCODE_VLE) != 0)))
{
static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
int cr;
int cc;
cr = value >> 2;
if (cr != 0)
(*info->fprintf_func) (info->stream, "4*cr%d+", cr);
cc = value & 3;
(*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
}
else
(*info->fprintf_func) (info->stream, "%" PRId64, value);
if (op_separator == need_paren)
(*info->fprintf_func) (info->stream, ")");
op_separator = need_comma;
if ((operand->flags & PPC_OPERAND_PARENS) != 0)
op_separator = need_paren;
}
/* We have found and printed an instruction. */
return insn_length;
}
/* We could not find a match. */
if (insn_length == 4)
(*info->fprintf_func) (info->stream, ".long 0x%x",
(unsigned int) insn);
else
(*info->fprintf_func) (info->stream, ".word 0x%x",
(unsigned int) insn >> 16);
return insn_length;
}
const disasm_options_and_args_t *
disassembler_options_powerpc (void)
{
static disasm_options_and_args_t *opts_and_args;
if (opts_and_args == NULL)
{
size_t i, num_options = ARRAY_SIZE (ppc_opts);
disasm_options_t *opts;
opts_and_args = XNEW (disasm_options_and_args_t);
opts_and_args->args = NULL;
opts = &opts_and_args->options;
opts->name = XNEWVEC (const char *, num_options + 1);
opts->description = NULL;
opts->arg = NULL;
for (i = 0; i < num_options; i++)
opts->name[i] = ppc_opts[i].opt;
/* The array we return must be NULL terminated. */
opts->name[i] = NULL;
}
return opts_and_args;
}
void
print_ppc_disassembler_options (FILE *stream)
{
unsigned int i, col;
fprintf (stream, _("\n\
The following PPC specific disassembler options are supported for use with\n\
the -M switch:\n"));
for (col = 0, i = 0; i < ARRAY_SIZE (ppc_opts); i++)
{
col += fprintf (stream, " %s,", ppc_opts[i].opt);
if (col > 66)
{
fprintf (stream, "\n");
col = 0;
}
}
fprintf (stream, "\n");
}