mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-12-03 04:12:10 +08:00
Code Issues Packages Projects Releases Wiki Activity
da4ae14a4d
binutils-gdb/opcodes/ppc-dis.c
Alan Modra 9cf7e5687f Use operand->extract to provide defaults for optional PowerPC operands 
Most optional operands to powerpc instructions use a default value of
zero, but there are a few exceptions.  Those have been handled by
PPC_OPERAND_OPTIONAL_VALUE and an entry in the powerpc_operands table
for the default value, smuggled in the shift field.  This patch
changes that to using the operand extract function to provide non-zero
defaults.

I've also moved the code determining whether optional operands are
provided or omitted, to the point the first optional operand is seen,
and allowed for the possibility of optional base register operands
in a future patch.

The patch does change the error you get on invalid assembly like

  ld 3,4

You'll now see "missing operand" rather than
"syntax error; end of line, expected `('".

gas/
	* config/tc-ppc.c (md_assemble): Delay counting of optional
	operands until one is encountered.  Allow for the possibility
	of optional base regs, ie. PPC_OPERAND_PARENS.  Call
	ppc_optional_operand_value with extra args.
include/
	* opcode/ppc.h (struct powerpc_operand): Correct "insert" comment.
	Mention use of "extract" function to provide default value.
	(PPC_OPERAND_OPTIONAL_VALUE): Delete.
	(ppc_optional_operand_value): Rewrite to use extract function.
opcodes/
	* ppc-dis.c (operand_value_powerpc): Init "invalid".
	(skip_optional_operands): Count optional operands, and update
	ppc_optional_operand_value call.
	* ppc-opc.c (extract_dxdn): Remove ATTRIBUTE_UNUSED from used arg.
	(extract_vlensi): Likewise.
	(extract_fxm): Return default value for missing optional operand.
	(extract_ls, extract_raq, extract_tbr): Likewise.
	(insert_sxl, extract_sxl): New functions.
	(insert_esync, extract_esync): Remove Power9 handling and simplify.
	(powerpc_operands <FXM4, TBR>): Delete PPC_OPERAND_OPTIONAL_VALUE
	flag and extra entry.
	(powerpc_operands <SXL>): Likewise, and use insert_sxl and
	extract_sxl.
2018-08-21 16:05:36 +09:30

873 lines
26 KiB
C
Raw Blame History

/* ppc-dis.c -- Disassemble PowerPC instructions
Copyright (C) 1994-2018 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;
} private;
#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 },
{ "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 },
{ "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;
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)
priv = &private;
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, "power9") | 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 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];
/* Calculate opcode table indices to speed up disassembly,
and init dialect. */
void
disassemble_init_powerpc (struct disassemble_info *info)
{
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;
}
/* 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 int
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 0;
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 0;
}
}
return 1;
}
/* 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 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[0] = buffer[1] = buffer[2] = buffer[3] = 0;
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
}
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_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 && (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;
int need_comma;
int need_paren;
int skip_optional;
if (opcode->operands[0] != 0)
(*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
else
(*info->fprintf_func) (info->stream, "%s", opcode->name);
/* Now extract and print the operands. */
need_comma = 0;
need_paren = 0;
skip_optional = -1;
for (opindex = opcode->operands; *opindex != 0; opindex++)
{
int64_t value;
operand = powerpc_operands + *opindex;
/* If all of the optional operands have the value zero,
then don't print any of them. */
if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0)
{
if (skip_optional < 0)
skip_optional = skip_optional_operands (opindex, insn,
dialect);
if (skip_optional)
continue;
}
value = operand_value_powerpc (operand, insn, dialect);
if (need_comma)
{
(*info->fprintf_func) (info->stream, ",");
need_comma = 0;
}
/* 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%" PPC_INT_FMT "d", value);
else if ((operand->flags & PPC_OPERAND_FPR) != 0)
(*info->fprintf_func) (info->stream, "f%" PPC_INT_FMT "d", value);
else if ((operand->flags & PPC_OPERAND_VR) != 0)
(*info->fprintf_func) (info->stream, "v%" PPC_INT_FMT "d", value);
else if ((operand->flags & PPC_OPERAND_VSR) != 0)
(*info->fprintf_func) (info->stream, "vs%" PPC_INT_FMT "d", 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%" PPC_INT_FMT "d", value);
else if ((operand->flags & PPC_OPERAND_FCR) != 0)
(*info->fprintf_func) (info->stream, "fcr%" PPC_INT_FMT "d", value);
else if ((operand->flags & PPC_OPERAND_UDI) != 0)
(*info->fprintf_func) (info->stream, "%" PPC_INT_FMT "d", value);
else if ((operand->flags & PPC_OPERAND_CR_REG) != 0
&& (((dialect & PPC_OPCODE_PPC) != 0)
|| ((dialect & PPC_OPCODE_VLE) != 0)))
(*info->fprintf_func) (info->stream, "cr%" PPC_INT_FMT "d", value);
else if (((operand->flags & PPC_OPERAND_CR_BIT) != 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, "%" PPC_INT_FMT "d", value);
if (need_paren)
{
(*info->fprintf_func) (info->stream, ")");
need_paren = 0;
}
if ((operand->flags & PPC_OPERAND_PARENS) == 0)
need_comma = 1;
else
{
(*info->fprintf_func) (info->stream, "(");
need_paren = 1;
}
}
/* We have found and printed an instruction. */
return insn_length;
}
/* We could not find a match. */
(*info->fprintf_func) (info->stream, ".long 0x%" PPC_INT_FMT "x", insn);
return 4;
}
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");
}
Reference in New Issue View Git Blame Copy Permalink