/* $NetBSD: disassem.c,v 1.14 2003/03/27 16:58:36 mycroft Exp $ */
/*-
* Copyright (c) 1996 Mark Brinicombe.
* Copyright (c) 1996 Brini.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RiscBSD kernel project
*
* db_disasm.c
*
* Kernel disassembler
*
* Created : 10/02/96
*
* Structured after the sparc/sparc/db_disasm.c by David S. Miller &
* Paul Kranenburg
*
* This code is not complete. Not all instructions are disassembled.
*/
#include <sys/cdefs.h>
//__FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/arm/arm/disassem.c,v 1.2 2005/01/05 21:58:47 imp Exp $");
#include <sys/param.h>
#include <stdio.h>
#include "disassem.h"
#include "armreg.h"
//#include <ddb/ddb.h>
/*
* General instruction format
*
* insn[cc][mod] [operands]
*
* Those fields with an uppercase format code indicate that the field
* follows directly after the instruction before the separator i.e.
* they modify the instruction rather than just being an operand to
* the instruction. The only exception is the writeback flag which
* follows a operand.
*
*
* 2 - print Operand 2 of a data processing instruction
* d - destination register (bits 12-15)
* n - n register (bits 16-19)
* s - s register (bits 8-11)
* o - indirect register rn (bits 16-19) (used by swap)
* m - m register (bits 0-3)
* a - address operand of ldr/str instruction
* e - address operand of ldrh/strh instruction
* l - register list for ldm/stm instruction
* f - 1st fp operand (register) (bits 12-14)
* g - 2nd fp operand (register) (bits 16-18)
* h - 3rd fp operand (register/immediate) (bits 0-4)
* j - xtb rotate literal (bits 10-11)
* i - bfx lsb literal (bits 7-11)
* w - bfx width literal (bits 16-20)
* b - branch address
* t - thumb branch address (bits 24, 0-23)
* k - breakpoint comment (bits 0-3, 8-19)
* X - block transfer type
* Y - block transfer type (r13 base)
* c - comment field bits(0-23)
* p - saved or current status register
* F - PSR transfer fields
* D - destination-is-r15 (P) flag on TST, TEQ, CMP, CMN
* L - co-processor transfer size
* S - set status flag
* P - fp precision
* Q - fp precision (for ldf/stf)
* R - fp rounding
* v - co-processor data transfer registers + addressing mode
* W - writeback flag
* x - instruction in hex
* # - co-processor number
* y - co-processor data processing registers
* z - co-processor register transfer registers
*/
struct arm32_insn {
u_int mask;
u_int pattern;
char* name;
char* format;
};
static const struct arm32_insn arm32_i[] = {
{ 0x0fffffff, 0x0ff00000, "imb", "c" }, /* Before swi */
{ 0x0fffffff, 0x0ff00001, "imbrange", "c" }, /* Before swi */
{ 0x0f000000, 0x0f000000, "swi", "c" },
{ 0xfe000000, 0xfa000000, "blx", "t" }, /* Before b and bl */
{ 0x0f000000, 0x0a000000, "b", "b" },
{ 0x0f000000, 0x0b000000, "bl", "b" },
{ 0x0fe000f0, 0x00000090, "mul", "Snms" },
{ 0x0fe000f0, 0x00200090, "mla", "Snmsd" },
{ 0x0fe000f0, 0x00800090, "umull", "Sdnms" },
{ 0x0fe000f0, 0x00c00090, "smull", "Sdnms" },
{ 0x0fe000f0, 0x00a00090, "umlal", "Sdnms" },
{ 0x0fe000f0, 0x00e00090, "smlal", "Sdnms" },
{ 0x0fff03f0, 0x06cf0070, "uxtb16", "dmj" },
{ 0x0fe00070, 0x07e00050, "ubfx", "dmiw" },
{ 0x0d700000, 0x04200000, "strt", "daW" },
{ 0x0d700000, 0x04300000, "ldrt", "daW" },
{ 0x0d700000, 0x04600000, "strbt", "daW" },
{ 0x0d700000, 0x04700000, "ldrbt", "daW" },
{ 0x0c500000, 0x04000000, "str", "daW" },
{ 0x0c500000, 0x04100000, "ldr", "daW" },
{ 0x0c500000, 0x04400000, "strb", "daW" },
{ 0x0c500000, 0x04500000, "ldrb", "daW" },
{ 0x0e1f0000, 0x080d0000, "stm", "YnWl" },/* separate out r13 base */
{ 0x0e1f0000, 0x081d0000, "ldm", "YnWl" },/* separate out r13 base */
{ 0x0e100000, 0x08000000, "stm", "XnWl" },
{ 0x0e100000, 0x08100000, "ldm", "XnWl" },
{ 0x0e1000f0, 0x00100090, "ldrb", "deW" },
{ 0x0e1000f0, 0x00000090, "strb", "deW" },
{ 0x0e1000f0, 0x001000d0, "ldrsb", "deW" },
{ 0x0e1000f0, 0x001000b0, "ldrh", "deW" },
{ 0x0e1000f0, 0x000000b0, "strh", "deW" },
{ 0x0e1000f0, 0x001000f0, "ldrsh", "deW" },
{ 0x0f200090, 0x00200090, "und", "x" }, /* Before data processing */
{ 0x0e1000d0, 0x000000d0, "und", "x" }, /* Before data processing */
{ 0x0ff00ff0, 0x01000090, "swp", "dmo" },
{ 0x0ff00ff0, 0x01400090, "swpb", "dmo" },
{ 0x0fbf0fff, 0x010f0000, "mrs", "dp" }, /* Before data processing */
{ 0x0fb0fff0, 0x0120f000, "msr", "pFm" },/* Before data processing */
{ 0x0fb0f000, 0x0320f000, "msr", "pF2" },/* Before data processing */
{ 0x0ffffff0, 0x012fff10, "bx", "m" },
{ 0x0fff0ff0, 0x016f0f10, "clz", "dm" },
{ 0x0ffffff0, 0x012fff30, "blx", "m" },
{ 0xfff000f0, 0xe1200070, "bkpt", "k" },
{ 0x0de00000, 0x00000000, "and", "Sdn2" },
{ 0x0de00000, 0x00200000, "eor", "Sdn2" },
{ 0x0de00000, 0x00400000, "sub", "Sdn2" },
{ 0x0de00000, 0x00600000, "rsb", "Sdn2" },
{ 0x0de00000, 0x00800000, "add", "Sdn2" },
{ 0x0de00000, 0x00a00000, "adc", "Sdn2" },
{ 0x0de00000, 0x00c00000, "sbc", "Sdn2" },
{ 0x0de00000, 0x00e00000, "rsc", "Sdn2" },
{ 0x0df00000, 0x01100000, "tst", "Dn2" },
{ 0x0df00000, 0x01300000, "teq", "Dn2" },
{ 0x0df00000, 0x01500000, "cmp", "Dn2" },
{ 0x0df00000, 0x01700000, "cmn", "Dn2" },
{ 0x0de00000, 0x01800000, "orr", "Sdn2" },
{ 0x0de00000, 0x01a00000, "mov", "Sd2" },
{ 0x0de00000, 0x01c00000, "bic", "Sdn2" },
{ 0x0de00000, 0x01e00000, "mvn", "Sd2" },
{ 0x0ff08f10, 0x0e000100, "adf", "PRfgh" },
{ 0x0ff08f10, 0x0e100100, "muf", "PRfgh" },
{ 0x0ff08f10, 0x0e200100, "suf", "PRfgh" },
{ 0x0ff08f10, 0x0e300100, "rsf", "PRfgh" },
{ 0x0ff08f10, 0x0e400100, "dvf", "PRfgh" },
{ 0x0ff08f10, 0x0e500100, "rdf", "PRfgh" },
{ 0x0ff08f10, 0x0e600100, "pow", "PRfgh" },
{ 0x0ff08f10, 0x0e700100, "rpw", "PRfgh" },
{ 0x0ff08f10, 0x0e800100, "rmf", "PRfgh" },
{ 0x0ff08f10, 0x0e900100, "fml", "PRfgh" },
{ 0x0ff08f10, 0x0ea00100, "fdv", "PRfgh" },
{ 0x0ff08f10, 0x0eb00100, "frd", "PRfgh" },
{ 0x0ff08f10, 0x0ec00100, "pol", "PRfgh" },
{ 0x0f008f10, 0x0e000100, "fpbop", "PRfgh" },
{ 0x0ff08f10, 0x0e008100, "mvf", "PRfh" },
{ 0x0ff08f10, 0x0e108100, "mnf", "PRfh" },
{ 0x0ff08f10, 0x0e208100, "abs", "PRfh" },
{ 0x0ff08f10, 0x0e308100, "rnd", "PRfh" },
{ 0x0ff08f10, 0x0e408100, "sqt", "PRfh" },
{ 0x0ff08f10, 0x0e508100, "log", "PRfh" },
{ 0x0ff08f10, 0x0e608100, "lgn", "PRfh" },
{ 0x0ff08f10, 0x0e708100, "exp", "PRfh" },
{ 0x0ff08f10, 0x0e808100, "sin", "PRfh" },
{ 0x0ff08f10, 0x0e908100, "cos", "PRfh" },
{ 0x0ff08f10, 0x0ea08100, "tan", "PRfh" },
{ 0x0ff08f10, 0x0eb08100, "asn", "PRfh" },
{ 0x0ff08f10, 0x0ec08100, "acs", "PRfh" },
{ 0x0ff08f10, 0x0ed08100, "atn", "PRfh" },
{ 0x0f008f10, 0x0e008100, "fpuop", "PRfh" },
{ 0x0e100f00, 0x0c000100, "stf", "QLv" },
{ 0x0e100f00, 0x0c100100, "ldf", "QLv" },
{ 0x0ff00f10, 0x0e000110, "flt", "PRgd" },
{ 0x0ff00f10, 0x0e100110, "fix", "PRdh" },
{ 0x0ff00f10, 0x0e200110, "wfs", "d" },
{ 0x0ff00f10, 0x0e300110, "rfs", "d" },
{ 0x0ff00f10, 0x0e400110, "wfc", "d" },
{ 0x0ff00f10, 0x0e500110, "rfc", "d" },
{ 0x0ff0ff10, 0x0e90f110, "cmf", "PRgh" },
{ 0x0ff0ff10, 0x0eb0f110, "cnf", "PRgh" },
{ 0x0ff0ff10, 0x0ed0f110, "cmfe", "PRgh" },
{ 0x0ff0ff10, 0x0ef0f110, "cnfe", "PRgh" },
{ 0xff100010, 0xfe000010, "mcr2", "#z" },
{ 0x0f100010, 0x0e000010, "mcr", "#z" },
{ 0xff100010, 0xfe100010, "mrc2", "#z" },
{ 0x0f100010, 0x0e100010, "mrc", "#z" },
{ 0xff000010, 0xfe000000, "cdp2", "#y" },
{ 0x0f000010, 0x0e000000, "cdp", "#y" },
{ 0xfe100090, 0xfc100000, "ldc2", "L#v" },
{ 0x0e100090, 0x0c100000, "ldc", "L#v" },
{ 0xfe100090, 0xfc000000, "stc2", "L#v" },
{ 0x0e100090, 0x0c000000, "stc", "L#v" },
{ 0xf550f000, 0xf550f000, "pld", "ne" },
{ 0x0ff00ff0, 0x01000050, "qaad", "dmn" },
{ 0x0ff00ff0, 0x01400050, "qdaad", "dmn" },
{ 0x0ff00ff0, 0x01600050, "qdsub", "dmn" },
{ 0x0ff00ff0, 0x01200050, "dsub", "dmn" },
{ 0x0ff000f0, 0x01000080, "smlabb", "nmsd" }, // d & n inverted!!
{ 0x0ff000f0, 0x010000a0, "smlatb", "nmsd" }, // d & n inverted!!
{ 0x0ff000f0, 0x010000c0, "smlabt", "nmsd" }, // d & n inverted!!
{ 0x0ff000f0, 0x010000e0, "smlatt", "nmsd" }, // d & n inverted!!
{ 0x0ff000f0, 0x01400080, "smlalbb","ndms" }, // d & n inverted!!
{ 0x0ff000f0, 0x014000a0, "smlaltb","ndms" }, // d & n inverted!!
{ 0x0ff000f0, 0x014000c0, "smlalbt","ndms" }, // d & n inverted!!
{ 0x0ff000f0, 0x014000e0, "smlaltt","ndms" }, // d & n inverted!!
{ 0x0ff000f0, 0x01200080, "smlawb", "nmsd" }, // d & n inverted!!
{ 0x0ff0f0f0, 0x012000a0, "smulwb","nms" }, // d & n inverted!!
{ 0x0ff000f0, 0x012000c0, "smlawt", "nmsd" }, // d & n inverted!!
{ 0x0ff0f0f0, 0x012000e0, "smulwt","nms" }, // d & n inverted!!
{ 0x0ff0f0f0, 0x01600080, "smulbb","nms" }, // d & n inverted!!
{ 0x0ff0f0f0, 0x016000a0, "smultb","nms" }, // d & n inverted!!
{ 0x0ff0f0f0, 0x016000c0, "smulbt","nms" }, // d & n inverted!!
{ 0x0ff0f0f0, 0x016000e0, "smultt","nms" }, // d & n inverted!!
{ 0x00000000, 0x00000000, NULL, NULL }
};
static char const arm32_insn_conditions[][4] = {
"eq", "ne", "cs", "cc",
"mi", "pl", "vs", "vc",
"hi", "ls", "ge", "lt",
"gt", "le", "", "nv"
};
static char const insn_block_transfers[][4] = {
"da", "ia", "db", "ib"
};
static char const insn_stack_block_transfers[][4] = {
"ed", "ea", "fd", "fa"
};
static char const op_shifts[][4] = {
"lsl", "lsr", "asr", "ror"
};
static char const insn_fpa_rounding[][2] = {
"", "p", "m", "z"
};
static char const insn_fpa_precision[][2] = {
"s", "d", "e", "p"
};
static char const insn_fpaconstants[][8] = {
"0.0", "1.0", "2.0", "3.0",
"4.0", "5.0", "0.5", "10.0"
};
#define insn_condition(x) arm32_insn_conditions[((x) >> 28) & 0x0f]
#define insn_blktrans(x) insn_block_transfers[((x) >> 23) & 3]
#define insn_stkblktrans(x) insn_stack_block_transfers[(3*(((x) >> 20)&1))^(((x) >> 23)&3)]
#define op2_shift(x) op_shifts[((x) >> 5) & 3]
#define insn_fparnd(x) insn_fpa_rounding[((x) >> 5) & 0x03]
#define insn_fpaprec(x) insn_fpa_precision[((((x) >> 18) & 2)|((x) >> 7)) & 1]
#define insn_fpaprect(x) insn_fpa_precision[((((x) >> 21) & 2)|((x) >> 15)) & 1]
#define insn_fpaimm(x) insn_fpaconstants[(x) & 0x07]
/* Local prototypes */
static void disasm_register_shift(const disasm_interface_t *di, u_int insn);
static void disasm_print_reglist(const disasm_interface_t *di, u_int insn);
static void disasm_insn_ldrstr(const disasm_interface_t *di, u_int insn,
u_int loc);
static void disasm_insn_ldrhstrh(const disasm_interface_t *di, u_int insn,
u_int loc);
static void disasm_insn_ldcstc(const disasm_interface_t *di, u_int insn,
u_int loc);
static u_int disassemble_readword(u_int address);
static void disassemble_printaddr(u_int address);
u_int
disasm(const disasm_interface_t *di, u_int loc, int __unused altfmt)
{
const struct arm32_insn *i_ptr = &arm32_i[0];
u_int insn = di->di_readword(loc);
int matchp = 0;
int branch;
char* f_ptr;
int fmt = 0;
/* di->di_printf("loc=%08x insn=%08x : ", loc, insn);*/
while (i_ptr->name) {
if ((insn & i_ptr->mask) == i_ptr->pattern) {
matchp = 1;
break;
}
i_ptr++;
}
if (!matchp) {
di->di_printf("und%s\t%08x\n", insn_condition(insn), insn);
return(loc + INSN_SIZE);
}
/* If instruction forces condition code, don't print it. */
if ((i_ptr->mask & 0xf0000000) == 0xf0000000)
di->di_printf("%s", i_ptr->name);
else
di->di_printf("%s%s", i_ptr->name, insn_condition(insn));
f_ptr = i_ptr->format;
/* Insert tab if there are no instruction modifiers */
if (*(f_ptr) < 'A' || *(f_ptr) > 'Z') {
++fmt;
di->di_printf("\t");
}
while (*f_ptr) {
switch (*f_ptr) {
/* 2 - print Operand 2 of a data processing instruction */
case '2':
if (insn & 0x02000000) {
int rotate= ((insn >> 7) & 0x1e);
di->di_printf("#0x%08x",
(insn & 0xff) << (32 - rotate) |
(insn & 0xff) >> rotate);
} else {
disasm_register_shift(di, insn);
}
break;
/* d - destination register (bits 12-15) */
case 'd':
di->di_printf("r%d", ((insn >> 12) & 0x0f));
break;
/* D - insert 'p' if Rd is R15 */
case 'D':
if (((insn >> 12) & 0x0f) == 15)
di->di_printf("p");
break;
/* n - n register (bits 16-19) */
case 'n':
di->di_printf("r%d", ((insn >> 16) & 0x0f));
break;
/* s - s register (bits 8-11) */
case 's':
di->di_printf("r%d", ((insn >> 8) & 0x0f));
break;
/* o - indirect register rn (bits 16-19) (used by swap) */
case 'o':
di->di_printf("[r%d]", ((insn >> 16) & 0x0f));
break;
/* m - m register (bits 0-4) */
case 'm':
di->di_printf("r%d", ((insn >> 0) & 0x0f));
break;
/* a - address operand of ldr/str instruction */
case 'a':
disasm_insn_ldrstr(di, insn, loc);
break;
/* e - address operand of ldrh/strh instruction */
case 'e':
disasm_insn_ldrhstrh(di, insn, loc);
break;
/* l - register list for ldm/stm instruction */
case 'l':
disasm_print_reglist(di, insn);
break;
/* f - 1st fp operand (register) (bits 12-14) */
case 'f':
di->di_printf("f%d", (insn >> 12) & 7);
break;
/* g - 2nd fp operand (register) (bits 16-18) */
case 'g':
di->di_printf("f%d", (insn >> 16) & 7);
break;
/* h - 3rd fp operand (register/immediate) (bits 0-4) */
case 'h':
if (insn & (1 << 3))
di->di_printf("#%s", insn_fpaimm(insn));
else
di->di_printf("f%d", insn & 7);
break;
/* j - xtb rotate literal (bits 10-11) */
case 'j':
di->di_printf("ror #%d", ((insn >> 10) & 3) << 3);
break;
/* i - bfx lsb literal (bits 7-11) */
case 'i':
di->di_printf("#%d", (insn >> 7) & 31);
break;
/* w - bfx width literal (bits 16-20) */
case 'w':
di->di_printf("#%d", 1 + ((insn >> 16) & 31));
break;
/* b - branch address */
case 'b':
branch = ((insn << 2) & 0x03ffffff);
if (branch & 0x02000000)
branch |= 0xfc000000;
di->di_printaddr(loc + 8 + branch);
break;
/* t - blx address */
case 't':
branch = ((insn << 2) & 0x03ffffff) |
(insn >> 23 & 0x00000002);
if (branch & 0x02000000)
branch |= 0xfc000000;
di->di_printaddr(loc + 8 + branch);
break;
/* X - block transfer type */
case 'X':
di->di_printf("%s", insn_blktrans(insn));
break;
/* Y - block transfer type (r13 base) */
case 'Y':
di->di_printf("%s", insn_stkblktrans(insn));
break;
/* c - comment field bits(0-23) */
case 'c':
di->di_printf("0x%08x", (insn & 0x00ffffff));
break;
/* k - breakpoint comment (bits 0-3, 8-19) */
case 'k':
di->di_printf("0x%04x",
(insn & 0x000fff00) >> 4 | (insn & 0x0000000f));
break;
/* p - saved or current status register */
case 'p':
if (insn & 0x00400000)
di->di_printf("spsr");
else
di->di_printf("cpsr");
break;
/* F - PSR transfer fields */
case 'F':
di->di_printf("_");
if (insn & (1 << 16))
di->di_printf("c");
if (insn & (1 << 17))
di->di_printf("x");
if (insn & (1 << 18))
di->di_printf("s");
if (insn & (1 << 19))
di->di_printf("f");
break;
/* B - byte transfer flag */
case 'B':
if (insn & 0x00400000)
di->di_printf("b");
break;
/* L - co-processor transfer size */
case 'L':
if (insn & (1 << 22))
di->di_printf("l");
break;
/* S - set status flag */
case 'S':
if (insn & 0x00100000)
di->di_printf("s");
break;
/* P - fp precision */
case 'P':
di->di_printf("%s", insn_fpaprec(insn));
break;
/* Q - fp precision (for ldf/stf) */
case 'Q':
break;
/* R - fp rounding */
case 'R':
di->di_printf("%s", insn_fparnd(insn));
break;
/* W - writeback flag */
case 'W':
if (insn & (1 << 21))
di->di_printf("!");
break;
/* # - co-processor number */
case '#':
di->di_printf("p%d", (insn >> 8) & 0x0f);
break;
/* v - co-processor data transfer registers+addressing mode */
case 'v':
disasm_insn_ldcstc(di, insn, loc);
break;
/* x - instruction in hex */
case 'x':
di->di_printf("0x%08x", insn);
break;
/* y - co-processor data processing registers */
case 'y':
di->di_printf("%d, ", (insn >> 20) & 0x0f);
di->di_printf("c%d, c%d, c%d", (insn >> 12) & 0x0f,
(insn >> 16) & 0x0f, insn & 0x0f);
di->di_printf(", %d", (insn >> 5) & 0x07);
break;
/* z - co-processor register transfer registers */
case 'z':
di->di_printf("%d, ", (insn >> 21) & 0x07);
di->di_printf("r%d, c%d, c%d, %d",
(insn >> 12) & 0x0f, (insn >> 16) & 0x0f,
insn & 0x0f, (insn >> 5) & 0x07);
/* if (((insn >> 5) & 0x07) != 0)
di->di_printf(", %d", (insn >> 5) & 0x07);*/
break;
default:
di->di_printf("[%c - unknown]", *f_ptr);
break;
}
if (*(f_ptr+1) >= 'A' && *(f_ptr+1) <= 'Z')
++f_ptr;
else if (*(++f_ptr)) {
++fmt;
if (fmt == 1)
di->di_printf("\t");
else
di->di_printf(", ");
}
};
di->di_printf("\n");
return(loc + INSN_SIZE);
}
static void
disasm_register_shift(const disasm_interface_t *di, u_int insn)
{
di->di_printf("r%d", (insn & 0x0f));
if ((insn & 0x00000ff0) == 0)
;
else if ((insn & 0x00000ff0) == 0x00000060)
di->di_printf(", rrx");
else {
if (insn & 0x10)
di->di_printf(", %s r%d", op2_shift(insn),
(insn >> 8) & 0x0f);
else
di->di_printf(", %s #%d", op2_shift(insn),
(insn >> 7) & 0x1f);
}
}
static void
disasm_print_reglist(const disasm_interface_t *di, u_int insn)
{
int loop;
int start;
int comma;
di->di_printf("{");
start = -1;
comma = 0;
for (loop = 0; loop < 17; ++loop) {
if (start != -1) {
if (loop == 16 || !(insn & (1 << loop))) {
if (comma)
di->di_printf(", ");
else
comma = 1;
if (start == loop - 1)
di->di_printf("r%d", start);
else
di->di_printf("r%d-r%d", start, loop - 1);
start = -1;
}
} else {
if (insn & (1 << loop))
start = loop;
}
}
di->di_printf("}");
if (insn & (1 << 22))
di->di_printf("^");
}
static void
disasm_insn_ldrstr(const disasm_interface_t *di, u_int insn, u_int loc)
{
int offset;
offset = insn & 0xfff;
if ((insn & 0x032f0000) == 0x010f0000) {
/* rA = pc, immediate index */
if (insn & 0x00800000)
loc += offset;
else
loc -= offset;
di->di_printaddr(loc + 8);
} else {
di->di_printf("[r%d", (insn >> 16) & 0x0f);
if ((insn & 0x03000fff) != 0x01000000) {
di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
if (!(insn & 0x00800000))
di->di_printf("-");
if (insn & (1 << 25))
disasm_register_shift(di, insn);
else
di->di_printf("#0x%03x", offset);
}
if (insn & (1 << 24))
di->di_printf("]");
}
}
static void
disasm_insn_ldrhstrh(const disasm_interface_t *di, u_int insn, u_int loc)
{
int offset;
offset = ((insn & 0xf00) >> 4) | (insn & 0xf);
if ((insn & 0x004f0000) == 0x004f0000) {
/* rA = pc, immediate index */
if (insn & 0x00800000)
loc += offset;
else
loc -= offset;
di->di_printaddr(loc + 8);
} else {
di->di_printf("[r%d", (insn >> 16) & 0x0f);
if ((insn & 0x01400f0f) != 0x01400000) {
di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
if (!(insn & 0x00800000))
di->di_printf("-");
if (insn & (1 << 22))
di->di_printf("#0x%02x", offset);
else
di->di_printf("r%d", (insn & 0x0f));
}
if (insn & (1 << 24))
di->di_printf("]");
}
}
static void
disasm_insn_ldcstc(const disasm_interface_t *di, u_int insn, u_int __unused loc)
{
if (((insn >> 8) & 0xf) == 1)
di->di_printf("f%d, ", (insn >> 12) & 0x07);
else
di->di_printf("c%d, ", (insn >> 12) & 0x0f);
di->di_printf("[r%d", (insn >> 16) & 0x0f);
di->di_printf("%s, ", (insn & (1 << 24)) ? "" : "]");
if (!(insn & (1 << 23)))
di->di_printf("-");
di->di_printf("#0x%03x", (insn & 0xff) << 2);
if (insn & (1 << 24))
di->di_printf("]");
if (insn & (1 << 21))
di->di_printf("!");
}
static u_int
disassemble_readword(u_int address)
{
return(*((u_int *)address));
}
static void
disassemble_printaddr(u_int address)
{
printf("0x%08x", address);
}
static const disasm_interface_t disassemble_di = {
disassemble_readword, disassemble_printaddr, printf
};
void
disassemble(u_int address)
{
(void)disasm(&disassemble_di, address, 0);
}
/* End of disassem.c */