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wine/programs/winedbg/be_arm.c

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/*
* Debugger ARM specific functions
*
* Copyright 2000-2003 Marcus Meissner
* 2004 Eric Pouech
* 2010-2012 André Hentschel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "debugger.h"
#if defined(__arm__) && !defined(__ARMEB__)
/*
* Switch to disassemble Thumb code.
*/
static BOOL db_disasm_thumb = FALSE;
/*
* Flag to indicate whether we need to display instruction,
* or whether we just need to know the address of the next
* instruction.
*/
static BOOL db_display = FALSE;
#define ARM_INSN_SIZE 4
#define THUMB_INSN_SIZE 2
#define THUMB2_INSN_SIZE 4
#define ROR32(n, r) (((n) >> (r)) | ((n) << (32 - (r))))
#define get_cond(ins) tbl_cond[(ins >> 28) & 0x0f]
#define get_nibble(ins, num) ((ins >> (num * 4)) & 0x0f)
static char const tbl_regs[][4] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
"fp", "ip", "sp", "lr", "pc", "cpsr"
};
static char const tbl_addrmode[][3] = {
"da", "ia", "db", "ib"
};
static char const tbl_cond[][3] = {
"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc", "hi", "ls", "ge", "lt", "gt", "le", "", ""
};
static char const tbl_dataops[][4] = {
"and", "eor", "sub", "rsb", "add", "adc", "sbc", "rsc", "tst", "teq", "cmp", "cmn", "orr",
"mov", "bic", "mvn"
};
static char const tbl_shifts[][4] = {
"lsl", "lsr", "asr", "ror"
};
static char const tbl_hiops_t[][4] = {
"add", "cmp", "mov", "bx"
};
static char const tbl_aluops_t[][4] = {
"and", "eor", "lsl", "lsr", "asr", "adc", "sbc", "ror", "tst", "neg", "cmp", "cmn", "orr",
"mul", "bic", "mvn"
};
static char const tbl_immops_t[][4] = {
"mov", "cmp", "add", "sub"
};
static char const tbl_sregops_t[][5] = {
"strh", "ldsb", "ldrh", "ldsh"
};
static UINT db_get_inst(void* addr, int size)
{
UINT result = 0;
char buffer[4];
if (dbg_read_memory(addr, buffer, size))
{
switch (size)
{
case 4:
result = *(UINT*)buffer;
break;
case 2:
result = *(WORD*)buffer;
break;
}
}
return result;
}
static void db_printsym(unsigned int addr)
{
ADDRESS64 a;
a.Mode = AddrModeFlat;
a.Offset = addr;
print_address(&a, TRUE);
}
static UINT arm_disasm_branch(UINT inst, ADDRESS64 *addr)
{
short link = (inst >> 24) & 0x01;
int offset = (inst << 2) & 0x03ffffff;
if (offset & 0x02000000) offset |= 0xfc000000;
offset += 8;
dbg_printf("\n\tb%s%s\t", link ? "l" : "", get_cond(inst));
db_printsym(addr->Offset + offset);
return 0;
}
static UINT arm_disasm_branchreg(UINT inst, ADDRESS64 *addr)
{
dbg_printf("\n\tb%s\t%s", get_cond(inst), tbl_regs[get_nibble(inst, 0)]);
return 0;
}
static UINT arm_disasm_dataprocessing(UINT inst, ADDRESS64 *addr)
{
short condcodes = (inst >> 20) & 0x01;
short opcode = (inst >> 21) & 0x0f;
short immediate = (inst >> 25) & 0x01;
short no_op1 = (opcode & 0x0d) == 0x0d;
short no_dst = (opcode & 0x0c) == 0x08;
/* check for nop */
if (get_nibble(inst, 3) == 15 /* r15 */ && condcodes == 0 &&
opcode >= 8 /* tst */ && opcode <= 11 /* cmn */)
{
dbg_printf("\n\tnop");
return 0;
}
dbg_printf("\n\t%s%s%s", tbl_dataops[opcode], condcodes ? "s" : "", get_cond(inst));
if (!no_dst) dbg_printf("\t%s, ", tbl_regs[get_nibble(inst, 3)]);
else dbg_printf("\t");
if (no_op1)
{
if (immediate)
dbg_printf("#%u", ROR32(inst & 0xff, 2 * get_nibble(inst, 2)));
else
dbg_printf("%s", tbl_regs[get_nibble(inst, 0)]);
}
else
{
if (immediate)
dbg_printf("%s, #%u", tbl_regs[get_nibble(inst, 4)],
ROR32(inst & 0xff, 2 * get_nibble(inst, 2)));
else if (((inst >> 4) & 0xff) == 0x00) /* no shift */
dbg_printf("%s, %s", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
else if (((inst >> 4) & 0x09) == 0x01) /* register shift */
dbg_printf("%s, %s, %s %s", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)],
tbl_shifts[(inst >> 5) & 0x03], tbl_regs[(inst >> 8) & 0x0f]);
else if (((inst >> 4) & 0x01) == 0x00) /* immediate shift */
dbg_printf("%s, %s, %s #%d", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)],
tbl_shifts[(inst >> 5) & 0x03], (inst >> 7) & 0x1f);
else
return inst;
}
return 0;
}
static UINT arm_disasm_singletrans(UINT inst, ADDRESS64 *addr)
{
short load = (inst >> 20) & 0x01;
short writeback = (inst >> 21) & 0x01;
short byte = (inst >> 22) & 0x01;
short direction = (inst >> 23) & 0x01;
short indexing = (inst >> 24) & 0x01;
short immediate = !((inst >> 25) & 0x01);
short offset = inst & 0x0fff;
if (!direction) offset *= -1;
dbg_printf("\n\t%s%s%s%s", load ? "ldr" : "str", byte ? "b" : "", writeback ? "t" : "",
get_cond(inst));
dbg_printf("\t%s, ", tbl_regs[get_nibble(inst, 3)]);
if (indexing)
{
if (immediate)
dbg_printf("[%s, #%d]", tbl_regs[get_nibble(inst, 4)], offset);
else if (((inst >> 4) & 0xff) == 0x00) /* no shift */
dbg_printf("[%s, %s]", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
else if (((inst >> 4) & 0x01) == 0x00) /* immediate shift (there's no register shift) */
dbg_printf("[%s, %s, %s #%d]", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)],
tbl_shifts[(inst >> 5) & 0x03], (inst >> 7) & 0x1f);
else
return inst;
}
else
{
if (immediate)
dbg_printf("[%s], #%d", tbl_regs[get_nibble(inst, 4)], offset);
else if (((inst >> 4) & 0xff) == 0x00) /* no shift */
dbg_printf("[%s], %s", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
else if (((inst >> 4) & 0x01) == 0x00) /* immediate shift (there's no register shift) */
dbg_printf("[%s], %s, %s #%d", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)],
tbl_shifts[(inst >> 5) & 0x03], (inst >> 7) & 0x1f);
else
return inst;
}
return 0;
}
static UINT arm_disasm_halfwordtrans(UINT inst, ADDRESS64 *addr)
{
short halfword = (inst >> 5) & 0x01;
short sign = (inst >> 6) & 0x01;
short load = (inst >> 20) & 0x01;
short writeback = (inst >> 21) & 0x01;
short immediate = (inst >> 22) & 0x01;
short direction = (inst >> 23) & 0x01;
short indexing = (inst >> 24) & 0x01;
short offset = ((inst >> 4) & 0xf0) + (inst & 0x0f);
if (!direction) offset *= -1;
dbg_printf("\n\t%s%s%s%s%s", load ? "ldr" : "str", sign ? "s" : "",
halfword ? "h" : (sign ? "b" : ""), writeback ? "t" : "", get_cond(inst));
dbg_printf("\t%s, ", tbl_regs[get_nibble(inst, 3)]);
if (indexing)
{
if (immediate)
dbg_printf("[%s, #%d]", tbl_regs[get_nibble(inst, 4)], offset);
else
dbg_printf("[%s, %s]", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
}
else
{
if (immediate)
dbg_printf("[%s], #%d", tbl_regs[get_nibble(inst, 4)], offset);
else
dbg_printf("[%s], %s", tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
}
return 0;
}
static UINT arm_disasm_blocktrans(UINT inst, ADDRESS64 *addr)
{
short load = (inst >> 20) & 0x01;
short writeback = (inst >> 21) & 0x01;
short psr = (inst >> 22) & 0x01;
short addrmode = (inst >> 23) & 0x03;
short i;
short last=15;
for (i=15;i>=0;i--)
if ((inst>>i) & 1)
{
last = i;
break;
}
dbg_printf("\n\t%s%s%s\t%s%s, {", load ? "ldm" : "stm", tbl_addrmode[addrmode], get_cond(inst),
tbl_regs[get_nibble(inst, 4)], writeback ? "!" : "");
for (i=0;i<=15;i++)
if ((inst>>i) & 1)
{
if (i == last) dbg_printf("%s", tbl_regs[i]);
else dbg_printf("%s, ", tbl_regs[i]);
}
dbg_printf("}%s", psr ? "^" : "");
return 0;
}
static UINT arm_disasm_swi(UINT inst, ADDRESS64 *addr)
{
UINT comment = inst & 0x00ffffff;
dbg_printf("\n\tswi%s\t#%d", get_cond(inst), comment);
return 0;
}
static UINT arm_disasm_coproctrans(UINT inst, ADDRESS64 *addr)
{
WORD CRm = inst & 0x0f;
WORD CP = (inst >> 5) & 0x07;
WORD CPnum = (inst >> 8) & 0x0f;
WORD CRn = (inst >> 16) & 0x0f;
WORD load = (inst >> 20) & 0x01;
WORD CP_Opc = (inst >> 21) & 0x07;
dbg_printf("\n\t%s%s\t%u, %u, %s, cr%u, cr%u, {%u}", load ? "mrc" : "mcr", get_cond(inst), CPnum,
CP, tbl_regs[get_nibble(inst, 3)], CRn, CRm, CP_Opc);
return 0;
}
static UINT arm_disasm_coprocdataop(UINT inst, ADDRESS64 *addr)
{
WORD CRm = inst & 0x0f;
WORD CP = (inst >> 5) & 0x07;
WORD CPnum = (inst >> 8) & 0x0f;
WORD CRd = (inst >> 12) & 0x0f;
WORD CRn = (inst >> 16) & 0x0f;
WORD CP_Opc = (inst >> 20) & 0x0f;
dbg_printf("\n\tcdp%s\t%u, %u, cr%u, cr%u, cr%u, {%u}", get_cond(inst),
CPnum, CP, CRd, CRn, CRm, CP_Opc);
return 0;
}
static UINT arm_disasm_coprocdatatrans(UINT inst, ADDRESS64 *addr)
{
WORD CPnum = (inst >> 8) & 0x0f;
WORD CRd = (inst >> 12) & 0x0f;
WORD load = (inst >> 20) & 0x01;
WORD writeback = (inst >> 21) & 0x01;
WORD translen = (inst >> 22) & 0x01;
WORD direction = (inst >> 23) & 0x01;
WORD indexing = (inst >> 24) & 0x01;
short offset = (inst & 0xff) << 2;
if (!direction) offset *= -1;
dbg_printf("\n\t%s%s%s", load ? "ldc" : "stc", translen ? "l" : "", get_cond(inst));
if (indexing)
dbg_printf("\t%u, cr%u, [%s, #%d]%s", CPnum, CRd, tbl_regs[get_nibble(inst, 4)], offset, writeback?"!":"");
else
dbg_printf("\t%u, cr%u, [%s], #%d", CPnum, CRd, tbl_regs[get_nibble(inst, 4)], offset);
return 0;
}
static WORD thumb_disasm_hireg(WORD inst, ADDRESS64 *addr)
{
short dst = inst & 0x07;
short src = (inst >> 3) & 0x07;
short h2 = (inst >> 6) & 0x01;
short h1 = (inst >> 7) & 0x01;
short op = (inst >> 8) & 0x03;
if (h1) dst += 8;
if (h2) src += 8;
if (op == 2 && dst == src) /* mov rx, rx */
{
dbg_printf("\n\tnop");
return 0;
}
if (op == 3)
dbg_printf("\n\tb%sx\t%s", h1?"l":"", tbl_regs[src]);
else
dbg_printf("\n\t%s\t%s, %s", tbl_hiops_t[op], tbl_regs[dst], tbl_regs[src]);
return 0;
}
static WORD thumb_disasm_aluop(WORD inst, ADDRESS64 *addr)
{
short dst = inst & 0x07;
short src = (inst >> 3) & 0x07;
short op = (inst >> 6) & 0x0f;
dbg_printf("\n\t%s\t%s, %s", tbl_aluops_t[op], tbl_regs[dst], tbl_regs[src]);
return 0;
}
static WORD thumb_disasm_pushpop(WORD inst, ADDRESS64 *addr)
{
short lrpc = (inst >> 8) & 0x01;
short load = (inst >> 11) & 0x01;
short i;
short last;
for (i=7;i>=0;i--)
if ((inst>>i) & 1) break;
last = i;
dbg_printf("\n\t%s\t{", load ? "pop" : "push");
for (i=0;i<=7;i++)
if ((inst>>i) & 1)
{
if (i == last) dbg_printf("%s", tbl_regs[i]);
else dbg_printf("%s, ", tbl_regs[i]);
}
if (lrpc)
dbg_printf("%s%s", last ? ", " : "", load ? "pc" : "lr");
dbg_printf("}");
return 0;
}
static WORD thumb_disasm_blocktrans(WORD inst, ADDRESS64 *addr)
{
short load = (inst >> 11) & 0x01;
short i;
short last;
for (i=7;i>=0;i--)
if ((inst>>i) & 1) break;
last = i;
dbg_printf("\n\t%s\t%s!, {", load ? "ldmia" : "stmia", tbl_regs[(inst >> 8) & 0x07]);
for (i=0;i<=7;i++)
if ((inst>>i) & 1)
{
if (i == last) dbg_printf("%s", tbl_regs[i]);
else dbg_printf("%s, ", tbl_regs[i]);
}
dbg_printf("}");
return 0;
}
static WORD thumb_disasm_condbranch(WORD inst, ADDRESS64 *addr)
{
WORD offset = inst & 0x00ff;
dbg_printf("\n\tb%s\t", tbl_cond[(inst >> 8) & 0x0f]);
db_printsym(addr->Offset + offset);
return 0;
}
static WORD thumb_disasm_uncondbranch(WORD inst, ADDRESS64 *addr)
{
short offset = (inst & 0x07ff) << 1;
if (offset & 0x0800) offset |= 0xf000;
offset += 4;
dbg_printf("\n\tb\t");
db_printsym(addr->Offset + offset);
return 0;
}
static WORD thumb_disasm_loadadr(WORD inst, ADDRESS64 *addr)
{
WORD src = (inst >> 11) & 0x01;
WORD offset = (inst & 0xff) << 2;
dbg_printf("\n\tadd\t%s, %s, #%d", tbl_regs[(inst >> 8) & 0x07], src ? "sp" : "pc", offset);
return 0;
}
static WORD thumb_disasm_swi(WORD inst, ADDRESS64 *addr)
{
WORD comment = inst & 0x00ff;
dbg_printf("\n\tswi\t#%d", comment);
return 0;
}
static WORD thumb_disasm_nop(WORD inst, ADDRESS64 *addr)
{
dbg_printf("\n\tnop");
return 0;
}
static WORD thumb_disasm_ldrpcrel(WORD inst, ADDRESS64 *addr)
{
WORD offset = (inst & 0xff) << 2;
dbg_printf("\n\tldr\t%s, [pc, #%u]", tbl_regs[(inst >> 8) & 0x07], offset);
return 0;
}
static WORD thumb_disasm_ldrsprel(WORD inst, ADDRESS64 *addr)
{
WORD offset = (inst & 0xff) << 2;
dbg_printf("\n\t%s\t%s, [sp, #%u]", (inst & 0x0800)?"ldr":"str", tbl_regs[(inst >> 8) & 0x07], offset);
return 0;
}
static WORD thumb_disasm_addsprel(WORD inst, ADDRESS64 *addr)
{
WORD offset = (inst & 0x7f) << 2;
if ((inst >> 7) & 0x01)
dbg_printf("\n\tsub\tsp, sp, #%u", offset);
else
dbg_printf("\n\tadd\tsp, sp, #%u", offset);
return 0;
}
static WORD thumb_disasm_ldrimm(WORD inst, ADDRESS64 *addr)
{
WORD offset = (inst & 0x07c0) >> 6;
dbg_printf("\n\t%s%s\t%s, [%s, #%u]", (inst & 0x0800)?"ldr":"str", (inst & 0x1000)?"b":"",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], (inst & 0x1000)?offset:(offset << 2));
return 0;
}
static WORD thumb_disasm_ldrhimm(WORD inst, ADDRESS64 *addr)
{
WORD offset = (inst & 0x07c0) >> 5;
dbg_printf("\n\t%s\t%s, [%s, #%u]", (inst & 0x0800)?"ldrh":"strh",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], offset);
return 0;
}
static WORD thumb_disasm_ldrreg(WORD inst, ADDRESS64 *addr)
{
dbg_printf("\n\t%s%s\t%s, [%s, %s]", (inst & 0x0800)?"ldr":"str", (inst & 0x0400)?"b":"",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], tbl_regs[(inst >> 6) & 0x07]);
return 0;
}
static WORD thumb_disasm_ldrsreg(WORD inst, ADDRESS64 *addr)
{
dbg_printf("\n\t%s\t%s, [%s, %s]", tbl_sregops_t[(inst >> 10) & 0x03],
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], tbl_regs[(inst >> 6) & 0x07]);
return 0;
}
static WORD thumb_disasm_immop(WORD inst, ADDRESS64 *addr)
{
WORD op = (inst >> 11) & 0x03;
dbg_printf("\n\t%s\t%s, #%u", tbl_immops_t[op], tbl_regs[(inst >> 8) & 0x07], inst & 0xff);
return 0;
}
static WORD thumb_disasm_addsub(WORD inst, ADDRESS64 *addr)
{
WORD op = (inst >> 9) & 0x01;
WORD immediate = (inst >> 10) & 0x01;
dbg_printf("\n\t%s\t%s, %s, ", op ? "sub" : "add",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07]);
if (immediate)
dbg_printf("#%d", (inst >> 6) & 0x07);
else
dbg_printf("%s", tbl_regs[(inst >> 6) & 0x07]);
return 0;
}
static WORD thumb_disasm_movshift(WORD inst, ADDRESS64 *addr)
{
WORD op = (inst >> 11) & 0x03;
dbg_printf("\n\t%s\t%s, %s, #%u", tbl_shifts[op],
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], (inst >> 6) & 0x1f);
return 0;
}
static UINT thumb2_disasm_branchlinked(UINT inst, ADDRESS64 *addr)
{
UINT offset = (((inst & 0x07ff0000) >> 4) | ((inst & 0x000007ff) << 1)) + 4;
dbg_printf("\n\tbl\t");
db_printsym(addr->Offset + offset);
return 0;
}
static UINT thumb2_disasm_misc(UINT inst, ADDRESS64 *addr)
{
WORD op1 = (inst >> 20) & 0x03;
WORD op2 = (inst >> 4) & 0x03;
if (get_nibble(inst, 4) != get_nibble(inst, 0))
return inst;
if (op1 == 3 && op2 == 0)
{
dbg_printf("\n\tclz\t%s, %s\t", tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 0)]);
return 0;
}
if (op1 == 1)
{
switch (op2)
{
case 0:
dbg_printf("\n\trev\t");
break;
case 1:
dbg_printf("\n\trev16\t");
break;
case 2:
dbg_printf("\n\trbit\t");
break;
case 3:
dbg_printf("\n\trevsh\t");
break;
}
dbg_printf("%s, %s\t", tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 0)]);
return 0;
}
return inst;
}
static UINT thumb2_disasm_mul(UINT inst, ADDRESS64 *addr)
{
WORD op1 = (inst >> 20) & 0x07;
WORD op2 = (inst >> 4) & 0x03;
if (op1)
return inst;
if (op2 == 0 && get_nibble(inst, 3) != 0xf)
{
dbg_printf("\n\tmla\t%s, %s, %s, %s\t", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 3)]);
return 0;
}
if (op2 == 0 && get_nibble(inst, 3) == 0xf)
{
dbg_printf("\n\tmul\t%s, %s, %s\t", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
return 0;
}
if (op2 == 1)
{
dbg_printf("\n\tmls\t%s, %s, %s, %s\t", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 3)]);
return 0;
}
return inst;
}
static UINT thumb2_disasm_longmuldiv(UINT inst, ADDRESS64 *addr)
{
WORD op1 = (inst >> 20) & 0x07;
WORD op2 = (inst >> 4) & 0x0f;
if (op2 == 0)
{
switch (op1)
{
case 0:
dbg_printf("\n\tsmull\t");
break;
case 2:
dbg_printf("\n\tumull\t");
break;
case 4:
dbg_printf("\n\tsmlal\t");
break;
case 6:
dbg_printf("\n\tumlal\t");
break;
default:
return inst;
}
dbg_printf("%s, %s, %s, %s\t", tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
return 0;
}
if (op2 == 0xffff)
{
switch (op1)
{
case 1:
dbg_printf("\n\tsdiv\t");
break;
case 3:
dbg_printf("\n\tudiv\t");
break;
default:
return inst;
}
dbg_printf("%s, %s, %s\t", tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
return 0;
}
return inst;
}
struct inst_arm
{
UINT mask;
UINT pattern;
UINT (*func)(UINT, ADDRESS64*);
};
static const struct inst_arm tbl_arm[] = {
{ 0x0e000000, 0x0a000000, arm_disasm_branch },
{ 0x0e000090, 0x00000090, arm_disasm_halfwordtrans },
{ 0x0fffff00, 0x012fff00, arm_disasm_branchreg },
{ 0x0c000000, 0x00000000, arm_disasm_dataprocessing },
{ 0x0c000000, 0x04000000, arm_disasm_singletrans },
{ 0x0e000000, 0x08000000, arm_disasm_blocktrans },
{ 0x0f000000, 0x0f000000, arm_disasm_swi },
{ 0x0f000010, 0x0e000010, arm_disasm_coproctrans },
{ 0x0f000010, 0x0e000000, arm_disasm_coprocdataop },
{ 0x0e000000, 0x0c000000, arm_disasm_coprocdatatrans },
{ 0x00000000, 0x00000000, NULL }
};
struct inst_thumb16
{
WORD mask;
WORD pattern;
WORD (*func)(WORD, ADDRESS64*);
};
static const struct inst_thumb16 tbl_thumb16[] = {
{ 0xfc00, 0x4400, thumb_disasm_hireg },
{ 0xfc00, 0x4000, thumb_disasm_aluop },
{ 0xf600, 0xb400, thumb_disasm_pushpop },
{ 0xf000, 0xc000, thumb_disasm_blocktrans },
{ 0xf000, 0xd000, thumb_disasm_condbranch },
{ 0xf800, 0xe000, thumb_disasm_uncondbranch },
{ 0xf000, 0xa000, thumb_disasm_loadadr },
{ 0xf800, 0x4800, thumb_disasm_ldrpcrel },
{ 0xf000, 0x9000, thumb_disasm_ldrsprel },
{ 0xff00, 0xb000, thumb_disasm_addsprel },
{ 0xe000, 0x6000, thumb_disasm_ldrimm },
{ 0xf000, 0x8000, thumb_disasm_ldrhimm },
{ 0xf200, 0x5000, thumb_disasm_ldrreg },
{ 0xf200, 0x5200, thumb_disasm_ldrsreg },
{ 0xe000, 0x2000, thumb_disasm_immop },
{ 0xff00, 0xdf00, thumb_disasm_swi },
{ 0xff00, 0xbf00, thumb_disasm_nop },
{ 0xf800, 0x1800, thumb_disasm_addsub },
{ 0xe000, 0x0000, thumb_disasm_movshift },
{ 0x0000, 0x0000, NULL }
};
static const struct inst_arm tbl_thumb32[] = {
{ 0xf800f800, 0xf000f800, thumb2_disasm_branchlinked },
{ 0xffc0f0c0, 0xfa80f080, thumb2_disasm_misc },
{ 0xff8000c0, 0xfb000000, thumb2_disasm_mul },
{ 0xff8000f0, 0xfb800000, thumb2_disasm_longmuldiv },
{ 0xff8000f0, 0xfb8000f0, thumb2_disasm_longmuldiv },
{ 0x00000000, 0x00000000, NULL }
};
/***********************************************************************
* disasm_one_insn
*
* Disassemble instruction at 'addr'. addr is changed to point to the
* start of the next instruction.
*/
void be_arm_disasm_one_insn(ADDRESS64 *addr, int display)
{
struct inst_arm *a_ptr = (struct inst_arm *)&tbl_arm;
struct inst_thumb16 *t_ptr = (struct inst_thumb16 *)&tbl_thumb16;
struct inst_arm *t2_ptr = (struct inst_arm *)&tbl_thumb32;
UINT inst;
WORD tinst;
int size;
int matched = 0;
char tmp[64];
DWORD_PTR* pval;
if (!memory_get_register(CV_ARM_CPSR, &pval, tmp, sizeof(tmp)))
dbg_printf("\n\tmemory_get_register failed: %s", tmp);
else
db_disasm_thumb=(*pval & 0x20)?TRUE:FALSE;
db_display = display;
if (!db_disasm_thumb)
{
size = ARM_INSN_SIZE;
inst = db_get_inst( memory_to_linear_addr(addr), size );
while (a_ptr->func) {
if ((inst & a_ptr->mask) == a_ptr->pattern) {
matched = 1;
break;
}
a_ptr++;
}
if (!matched) {
dbg_printf("\n\tUnknown ARM Instruction: %08x", inst);
addr->Offset += size;
}
else
{
if (!a_ptr->func(inst, addr))
addr->Offset += size;
}
return;
}
else
{
WORD *taddr = memory_to_linear_addr(addr);
tinst = db_get_inst( taddr, THUMB_INSN_SIZE );
switch (tinst & 0xf800)
{
case 0xe800:
case 0xf000:
case 0xf800:
size = THUMB2_INSN_SIZE;
taddr++;
inst = db_get_inst( taddr, THUMB_INSN_SIZE );
inst |= (tinst << 16);
while (t2_ptr->func) {
if ((inst & t2_ptr->mask) == t2_ptr->pattern) {
matched = 1;
break;
}
t2_ptr++;
}
if (!matched) {
dbg_printf("\n\tUnknown Thumb2 Instruction: %08x", inst);
addr->Offset += size;
}
else
{
if (!t2_ptr->func(inst, addr))
addr->Offset += size;
}
return;
default:
break;
}
size = THUMB_INSN_SIZE;
while (t_ptr->func) {
if ((tinst & t_ptr->mask) == t_ptr->pattern) {
matched = 1;
break;
}
t_ptr++;
}
if (!matched) {
dbg_printf("\n\tUnknown Thumb Instruction: %04x", tinst);
addr->Offset += size;
}
else
{
if (!t_ptr->func(tinst, addr))
addr->Offset += size;
}
return;
}
}
static unsigned be_arm_get_addr(HANDLE hThread, const CONTEXT* ctx,
enum be_cpu_addr bca, ADDRESS64* addr)
{
switch (bca)
{
case be_cpu_addr_pc:
return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Pc);
case be_cpu_addr_stack:
return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Sp);
case be_cpu_addr_frame:
return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Fp);
}
return FALSE;
}
static unsigned be_arm_get_register_info(int regno, enum be_cpu_addr* kind)
{
switch (regno)
{
case CV_ARM_PC: *kind = be_cpu_addr_pc; return TRUE;
case CV_ARM_R0 + 11: *kind = be_cpu_addr_frame; return TRUE;
case CV_ARM_SP: *kind = be_cpu_addr_stack; return TRUE;
}
return FALSE;
}
static void be_arm_single_step(CONTEXT* ctx, unsigned enable)
{
dbg_printf("be_arm_single_step: not done\n");
}
static void be_arm_print_context(HANDLE hThread, const CONTEXT* ctx, int all_regs)
{
static const char condflags[] = "NZCV";
int i;
char buf[8];
switch (ctx->Cpsr & 0x1F)
{
case 0: strcpy(buf, "User26"); break;
case 1: strcpy(buf, "FIQ26"); break;
case 2: strcpy(buf, "IRQ26"); break;
case 3: strcpy(buf, "SVC26"); break;
case 16: strcpy(buf, "User"); break;
case 17: strcpy(buf, "FIQ"); break;
case 18: strcpy(buf, "IRQ"); break;
case 19: strcpy(buf, "SVC"); break;
case 23: strcpy(buf, "ABT"); break;
case 27: strcpy(buf, "UND"); break;
default: strcpy(buf, "UNKNWN"); break;
}
dbg_printf("Register dump:\n");
dbg_printf("%s %s Mode\n", (ctx->Cpsr & 0x20) ? "Thumb" : "ARM", buf);
strcpy(buf, condflags);
for (i = 0; buf[i]; i++)
if (!((ctx->Cpsr >> 26) & (1 << (sizeof(condflags) - i))))
buf[i] = '-';
dbg_printf(" Pc:%04x Sp:%04x Lr:%04x Cpsr:%04x(%s)\n",
ctx->Pc, ctx->Sp, ctx->Lr, ctx->Cpsr, buf);
dbg_printf(" r0:%04x r1:%04x r2:%04x r3:%04x\n",
ctx->R0, ctx->R1, ctx->R2, ctx->R3);
dbg_printf(" r4:%04x r5:%04x r6:%04x r7:%04x r8:%04x\n",
ctx->R4, ctx->R5, ctx->R6, ctx->R7, ctx->R8 );
dbg_printf(" r9:%04x r10:%04x Fp:%04x Ip:%04x\n",
ctx->R9, ctx->R10, ctx->Fp, ctx->Ip );
if (all_regs) dbg_printf( "Floating point ARM dump not implemented\n" );
}
static void be_arm_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
{
}
static struct dbg_internal_var be_arm_ctx[] =
{
{CV_ARM_R0 + 0, "r0", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R0), dbg_itype_unsigned_int},
{CV_ARM_R0 + 1, "r1", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R1), dbg_itype_unsigned_int},
{CV_ARM_R0 + 2, "r2", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R2), dbg_itype_unsigned_int},
{CV_ARM_R0 + 3, "r3", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R3), dbg_itype_unsigned_int},
{CV_ARM_R0 + 4, "r4", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R4), dbg_itype_unsigned_int},
{CV_ARM_R0 + 5, "r5", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R5), dbg_itype_unsigned_int},
{CV_ARM_R0 + 6, "r6", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R6), dbg_itype_unsigned_int},
{CV_ARM_R0 + 7, "r7", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R7), dbg_itype_unsigned_int},
{CV_ARM_R0 + 8, "r8", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R8), dbg_itype_unsigned_int},
{CV_ARM_R0 + 9, "r9", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R9), dbg_itype_unsigned_int},
{CV_ARM_R0 + 10, "r10", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R10), dbg_itype_unsigned_int},
{CV_ARM_R0 + 11, "r11", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Fp), dbg_itype_unsigned_int},
{CV_ARM_R0 + 12, "r12", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Ip), dbg_itype_unsigned_int},
{CV_ARM_SP, "sp", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Sp), dbg_itype_unsigned_int},
{CV_ARM_LR, "lr", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Lr), dbg_itype_unsigned_int},
{CV_ARM_PC, "pc", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Pc), dbg_itype_unsigned_int},
{CV_ARM_CPSR, "cpsr", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Cpsr), dbg_itype_unsigned_int},
{0, NULL, 0, dbg_itype_none}
};
static unsigned be_arm_is_step_over_insn(const void* insn)
{
dbg_printf("be_arm_is_step_over_insn: not done\n");
return FALSE;
}
static unsigned be_arm_is_function_return(const void* insn)
{
dbg_printf("be_arm_is_function_return: not done\n");
return FALSE;
}
static unsigned be_arm_is_break_insn(const void* insn)
{
dbg_printf("be_arm_is_break_insn: not done\n");
return FALSE;
}
static unsigned be_arm_is_func_call(const void* insn, ADDRESS64* callee)
{
return FALSE;
}
static unsigned be_arm_is_jump(const void* insn, ADDRESS64* jumpee)
{
return FALSE;
}
static unsigned be_arm_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
CONTEXT* ctx, enum be_xpoint_type type,
void* addr, unsigned long* val, unsigned size)
{
SIZE_T sz;
switch (type)
{
case be_xpoint_break:
if (!size) return 0;
if (!pio->read(hProcess, addr, val, 4, &sz) || sz != 4) return 0;
default:
dbg_printf("Unknown/unsupported bp type %c\n", type);
return 0;
}
return 1;
}
static unsigned be_arm_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
CONTEXT* ctx, enum be_xpoint_type type,
void* addr, unsigned long val, unsigned size)
{
SIZE_T sz;
switch (type)
{
case be_xpoint_break:
if (!size) return 0;
if (!pio->write(hProcess, addr, &val, 4, &sz) || sz == 4) return 0;
break;
default:
dbg_printf("Unknown/unsupported bp type %c\n", type);
return 0;
}
return 1;
}
static unsigned be_arm_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
{
dbg_printf("be_arm_is_watchpoint_set: not done\n");
return FALSE;
}
static void be_arm_clear_watchpoint(CONTEXT* ctx, unsigned idx)
{
dbg_printf("be_arm_clear_watchpoint: not done\n");
}
static int be_arm_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
{
INT step = (ctx->Cpsr & 0x20) ? 2 : 4;
if (way)
{
ctx->Pc -= step;
return -step;
}
ctx->Pc += step;
return step;
}
static int be_arm_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
unsigned ext_sign, LONGLONG* ret)
{
if (size != 1 && size != 2 && size != 4 && size != 8) return FALSE;
memset(ret, 0, sizeof(*ret)); /* clear unread bytes */
/* FIXME: this assumes that debuggee and debugger use the same
* integral representation
*/
if (!memory_read_value(lvalue, size, ret)) return FALSE;
/* propagate sign information */
if (ext_sign && size < 8 && (*ret >> (size * 8 - 1)) != 0)
{
ULONGLONG neg = -1;
*ret |= neg << (size * 8);
}
return TRUE;
}
static int be_arm_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
long double* ret)
{
char tmp[sizeof(long double)];
/* FIXME: this assumes that debuggee and debugger use the same
* representation for reals
*/
if (!memory_read_value(lvalue, size, tmp)) return FALSE;
switch (size)
{
case sizeof(float): *ret = *(float*)tmp; break;
case sizeof(double): *ret = *(double*)tmp; break;
default: return FALSE;
}
return TRUE;
}
static int be_arm_store_integer(const struct dbg_lvalue* lvalue, unsigned size,
unsigned is_signed, LONGLONG val)
{
/* this is simple if we're on a little endian CPU */
return memory_write_value(lvalue, size, &val);
}
struct backend_cpu be_arm =
{
IMAGE_FILE_MACHINE_ARMV7,
4,
be_cpu_linearize,
be_cpu_build_addr,
be_arm_get_addr,
be_arm_get_register_info,
be_arm_single_step,
be_arm_print_context,
be_arm_print_segment_info,
be_arm_ctx,
be_arm_is_step_over_insn,
be_arm_is_function_return,
be_arm_is_break_insn,
be_arm_is_func_call,
be_arm_is_jump,
be_arm_disasm_one_insn,
be_arm_insert_Xpoint,
be_arm_remove_Xpoint,
be_arm_is_watchpoint_set,
be_arm_clear_watchpoint,
be_arm_adjust_pc_for_break,
be_arm_fetch_integer,
be_arm_fetch_float,
be_arm_store_integer,
};
#endif
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