559 lines
17 KiB
C
559 lines
17 KiB
C
/* ppc-dis.c -- Disassemble PowerPC instructions
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Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
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2008, 2009, 2010 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Cygnus Support
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This file is part of the GNU opcodes library.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with this file; see the file COPYING. If not, write to the
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Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include "sysdep.h"
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#include "dis-asm.h"
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#include "opintl.h"
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#include "opcode/ppc.h"
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/* This file provides several disassembler functions, all of which use
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the disassembler interface defined in dis-asm.h. Several functions
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are provided because this file handles disassembly for the PowerPC
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in both big and little endian mode and also for the POWER (RS/6000)
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chip. */
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static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int,
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ppc_cpu_t);
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struct dis_private
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{
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/* Stash the result of parsing disassembler_options here. */
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ppc_cpu_t dialect;
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};
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#define POWERPC_DIALECT(INFO) \
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(((struct dis_private *) ((INFO)->private_data))->dialect)
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struct ppc_mopt {
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const char *opt;
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ppc_cpu_t cpu;
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ppc_cpu_t sticky;
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};
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struct ppc_mopt ppc_opts[] = {
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{ "403", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_403
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| PPC_OPCODE_32),
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0 },
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{ "405", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_403
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| PPC_OPCODE_405 | PPC_OPCODE_32),
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0 },
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{ "440", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_32
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| PPC_OPCODE_440 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI),
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0 },
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{ "464", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_32
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| PPC_OPCODE_440 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI),
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0 },
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{ "476", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ISEL
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| PPC_OPCODE_440 | PPC_OPCODE_476 | PPC_OPCODE_POWER4
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| PPC_OPCODE_POWER5),
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0 },
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{ "601", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_601
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| PPC_OPCODE_32),
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0 },
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{ "603", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_32),
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0 },
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{ "604", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_32),
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0 },
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{ "620", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64),
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0 },
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{ "7400", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ALTIVEC
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| PPC_OPCODE_32),
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0 },
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{ "7410", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ALTIVEC
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| PPC_OPCODE_32),
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0 },
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{ "7450", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ALTIVEC
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| PPC_OPCODE_32),
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0 },
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{ "7455", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ALTIVEC
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| PPC_OPCODE_32),
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0 },
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{ "750cl", (PPC_OPCODE_PPC | PPC_OPCODE_PPCPS)
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, 0 },
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{ "a2", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ISEL
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| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_CACHELCK
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| PPC_OPCODE_64 | PPC_OPCODE_A2),
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0 },
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{ "altivec", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC),
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PPC_OPCODE_ALTIVEC },
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{ "any", 0,
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PPC_OPCODE_ANY },
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{ "booke", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_32),
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0 },
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{ "booke32", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_32),
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0 },
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{ "cell", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC),
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0 },
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{ "com", (PPC_OPCODE_COMMON | PPC_OPCODE_32),
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0 },
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{ "e300", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_32
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| PPC_OPCODE_E300),
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0 },
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{ "e500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_SPE
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| PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
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| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
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| PPC_OPCODE_E500MC),
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0 },
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{ "e500mc", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
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| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
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| PPC_OPCODE_E500MC),
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0 },
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{ "e500mc64", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
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| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
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| PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_POWER5
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| PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
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0 },
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{ "e500x2", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_SPE
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| PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
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| PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
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| PPC_OPCODE_E500MC),
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0 },
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{ "efs", (PPC_OPCODE_PPC | PPC_OPCODE_EFS),
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0 },
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{ "power4", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4),
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0 },
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{ "power5", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5),
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0 },
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{ "power6", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
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| PPC_OPCODE_ALTIVEC),
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0 },
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{ "power7", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ISEL
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| PPC_OPCODE_64 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5
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| PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7 | PPC_OPCODE_ALTIVEC
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| PPC_OPCODE_VSX),
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0 },
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{ "ppc", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_32),
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0 },
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{ "ppc32", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_32),
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0 },
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{ "ppc64", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64),
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0 },
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{ "ppc64bridge", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64_BRIDGE
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| PPC_OPCODE_64),
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0 },
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{ "ppcps", (PPC_OPCODE_PPC | PPC_OPCODE_PPCPS),
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0 },
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{ "pwr", (PPC_OPCODE_POWER | PPC_OPCODE_32),
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0 },
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{ "pwr2", (PPC_OPCODE_POWER | PPC_OPCODE_POWER2 | PPC_OPCODE_32),
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0 },
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{ "pwr4", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4),
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0 },
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{ "pwr5", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5),
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0 },
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{ "pwr5x", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5),
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0 },
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{ "pwr6", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_64
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| PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
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| PPC_OPCODE_ALTIVEC),
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0 },
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{ "pwr7", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_ISEL
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| PPC_OPCODE_64 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5
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| PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7 | PPC_OPCODE_ALTIVEC
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| PPC_OPCODE_VSX),
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0 },
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{ "pwrx", (PPC_OPCODE_POWER | PPC_OPCODE_POWER2 | PPC_OPCODE_32),
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0 },
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{ "spe", (PPC_OPCODE_PPC | PPC_OPCODE_EFS),
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PPC_OPCODE_SPE },
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{ "titan", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_32
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| PPC_OPCODE_PMR | PPC_OPCODE_RFMCI | PPC_OPCODE_TITAN),
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0 },
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{ "vsx", (PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC),
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PPC_OPCODE_VSX },
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};
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/* Handle -m and -M options that set cpu type, and .machine arg. */
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ppc_cpu_t
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ppc_parse_cpu (ppc_cpu_t ppc_cpu, const char *arg)
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{
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/* Sticky bits. */
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ppc_cpu_t retain_flags = ppc_cpu & (PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX
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| PPC_OPCODE_SPE | PPC_OPCODE_ANY);
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unsigned int i;
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for (i = 0; i < sizeof (ppc_opts) / sizeof (ppc_opts[0]); i++)
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if (strcmp (ppc_opts[i].opt, arg) == 0)
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{
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if (ppc_opts[i].sticky)
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{
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retain_flags |= ppc_opts[i].sticky;
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if ((ppc_cpu & ~(PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX
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| PPC_OPCODE_SPE | PPC_OPCODE_ANY)) != 0)
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break;
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}
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ppc_cpu = ppc_opts[i].cpu;
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break;
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}
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if (i >= sizeof (ppc_opts) / sizeof (ppc_opts[0]))
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return 0;
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ppc_cpu |= retain_flags;
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return ppc_cpu;
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}
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/* Determine which set of machines to disassemble for. */
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static int
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powerpc_init_dialect (struct disassemble_info *info)
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{
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ppc_cpu_t dialect = 0;
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char *arg;
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struct dis_private *priv = calloc (sizeof (*priv), 1);
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if (priv == NULL)
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return FALSE;
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arg = info->disassembler_options;
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while (arg != NULL)
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{
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ppc_cpu_t new_cpu = 0;
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char *end = strchr (arg, ',');
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if (end != NULL)
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*end = 0;
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if ((new_cpu = ppc_parse_cpu (dialect, arg)) != 0)
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dialect = new_cpu;
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else if (strcmp (arg, "32") == 0)
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{
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dialect &= ~PPC_OPCODE_64;
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dialect |= PPC_OPCODE_32;
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}
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else if (strcmp (arg, "64") == 0)
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{
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dialect |= PPC_OPCODE_64;
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dialect &= ~PPC_OPCODE_32;
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}
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else
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fprintf (stderr, _("warning: ignoring unknown -M%s option\n"), arg);
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if (end != NULL)
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*end++ = ',';
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arg = end;
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}
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if ((dialect & ~(PPC_OPCODE_32 | PPC_OPCODE_64)) == 0)
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{
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if (info->mach == bfd_mach_ppc64)
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dialect |= PPC_OPCODE_64;
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else
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dialect |= PPC_OPCODE_32;
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/* Choose a reasonable default. */
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dialect |= (PPC_OPCODE_PPC | PPC_OPCODE_COMMON | PPC_OPCODE_CLASSIC
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| PPC_OPCODE_601 | PPC_OPCODE_ALTIVEC);
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}
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info->private_data = priv;
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POWERPC_DIALECT(info) = dialect;
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return TRUE;
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}
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/* Print a big endian PowerPC instruction. */
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int
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print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
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{
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if (info->private_data == NULL && !powerpc_init_dialect (info))
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return -1;
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return print_insn_powerpc (memaddr, info, 1, POWERPC_DIALECT(info));
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}
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/* Print a little endian PowerPC instruction. */
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int
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print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
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{
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if (info->private_data == NULL && !powerpc_init_dialect (info))
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return -1;
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return print_insn_powerpc (memaddr, info, 0, POWERPC_DIALECT(info));
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}
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/* Print a POWER (RS/6000) instruction. */
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int
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print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info)
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{
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return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
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}
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/* Extract the operand value from the PowerPC or POWER instruction. */
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static long
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operand_value_powerpc (const struct powerpc_operand *operand,
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unsigned long insn, ppc_cpu_t dialect)
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{
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long value;
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int invalid;
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/* Extract the value from the instruction. */
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if (operand->extract)
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value = (*operand->extract) (insn, dialect, &invalid);
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else
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{
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value = (insn >> operand->shift) & operand->bitm;
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if ((operand->flags & PPC_OPERAND_SIGNED) != 0)
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{
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/* BITM is always some number of zeros followed by some
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number of ones, followed by some numer of zeros. */
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unsigned long top = operand->bitm;
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/* top & -top gives the rightmost 1 bit, so this
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fills in any trailing zeros. */
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top |= (top & -top) - 1;
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top &= ~(top >> 1);
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value = (value ^ top) - top;
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}
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}
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return value;
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}
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/* Determine whether the optional operand(s) should be printed. */
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static int
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skip_optional_operands (const unsigned char *opindex,
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unsigned long insn, ppc_cpu_t dialect)
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{
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const struct powerpc_operand *operand;
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for (; *opindex != 0; opindex++)
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{
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operand = &powerpc_operands[*opindex];
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if ((operand->flags & PPC_OPERAND_NEXT) != 0
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|| ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
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&& operand_value_powerpc (operand, insn, dialect) != 0))
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return 0;
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}
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return 1;
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}
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/* Print a PowerPC or POWER instruction. */
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static int
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print_insn_powerpc (bfd_vma memaddr,
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struct disassemble_info *info,
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int bigendian,
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ppc_cpu_t dialect)
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{
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bfd_byte buffer[4];
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int status;
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unsigned long insn;
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const struct powerpc_opcode *opcode;
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const struct powerpc_opcode *opcode_end;
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unsigned long op;
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ppc_cpu_t dialect_orig = dialect;
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status = (*info->read_memory_func) (memaddr, buffer, 4, info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, memaddr, info);
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return -1;
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}
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if (bigendian)
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insn = bfd_getb32 (buffer);
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else
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insn = bfd_getl32 (buffer);
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/* Get the major opcode of the instruction. */
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op = PPC_OP (insn);
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/* Find the first match in the opcode table. We could speed this up
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a bit by doing a binary search on the major opcode. */
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opcode_end = powerpc_opcodes + powerpc_num_opcodes;
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again:
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for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
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{
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unsigned long table_op;
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const unsigned char *opindex;
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const struct powerpc_operand *operand;
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int invalid;
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int need_comma;
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int need_paren;
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int skip_optional;
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table_op = PPC_OP (opcode->opcode);
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if (op < table_op)
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break;
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if (op > table_op)
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continue;
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if ((insn & opcode->mask) != opcode->opcode
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|| (opcode->flags & dialect) == 0
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|| (opcode->deprecated & dialect_orig) != 0)
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continue;
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/* Make two passes over the operands. First see if any of them
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have extraction functions, and, if they do, make sure the
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instruction is valid. */
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invalid = 0;
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for (opindex = opcode->operands; *opindex != 0; opindex++)
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{
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operand = powerpc_operands + *opindex;
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if (operand->extract)
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(*operand->extract) (insn, dialect, &invalid);
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}
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if (invalid)
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continue;
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/* The instruction is valid. */
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if (opcode->operands[0] != 0)
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(*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
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else
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(*info->fprintf_func) (info->stream, "%s", opcode->name);
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/* Now extract and print the operands. */
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need_comma = 0;
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need_paren = 0;
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skip_optional = -1;
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for (opindex = opcode->operands; *opindex != 0; opindex++)
|
|
{
|
|
long value;
|
|
|
|
operand = powerpc_operands + *opindex;
|
|
|
|
/* Operands that are marked FAKE are simply ignored. We
|
|
already made sure that the extract function considered
|
|
the instruction to be valid. */
|
|
if ((operand->flags & PPC_OPERAND_FAKE) != 0)
|
|
continue;
|
|
|
|
/* 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%ld", value);
|
|
else if ((operand->flags & PPC_OPERAND_FPR) != 0)
|
|
(*info->fprintf_func) (info->stream, "f%ld", value);
|
|
else if ((operand->flags & PPC_OPERAND_VR) != 0)
|
|
(*info->fprintf_func) (info->stream, "v%ld", value);
|
|
else if ((operand->flags & PPC_OPERAND_VSR) != 0)
|
|
(*info->fprintf_func) (info->stream, "vs%ld", 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%ld", value);
|
|
else if ((operand->flags & PPC_OPERAND_FCR) != 0)
|
|
(*info->fprintf_func) (info->stream, "fcr%ld", value);
|
|
else if ((operand->flags & PPC_OPERAND_UDI) != 0)
|
|
(*info->fprintf_func) (info->stream, "%ld", value);
|
|
else if ((operand->flags & PPC_OPERAND_CR) != 0
|
|
&& (dialect & PPC_OPCODE_PPC) != 0)
|
|
{
|
|
if (operand->bitm == 7)
|
|
(*info->fprintf_func) (info->stream, "cr%ld", value);
|
|
else
|
|
{
|
|
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, "%ld", 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. */
|
|
return 4;
|
|
}
|
|
|
|
if ((dialect & PPC_OPCODE_ANY) != 0)
|
|
{
|
|
dialect = ~PPC_OPCODE_ANY;
|
|
goto again;
|
|
}
|
|
|
|
/* We could not find a match. */
|
|
(*info->fprintf_func) (info->stream, ".long 0x%lx", insn);
|
|
|
|
return 4;
|
|
}
|
|
|
|
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 < sizeof (ppc_opts) / sizeof (ppc_opts[0]); i++)
|
|
{
|
|
col += fprintf (stream, " %s,", ppc_opts[i].opt);
|
|
if (col > 66)
|
|
{
|
|
fprintf (stream, "\n");
|
|
col = 0;
|
|
}
|
|
}
|
|
fprintf (stream, " 32, 64\n");
|
|
}
|