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/*
* Copyright (c) 2017, Max Filippov, Open Source and Linux Lab.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE AUTHOR 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.
*/
#include "qemu/osdep.h"
#include "disas/dis-asm.h"
#include "hw/xtensa/xtensa-isa.h"
int print_insn_xtensa(bfd_vma memaddr, struct disassemble_info *info)
{
xtensa_isa isa = info->private_data;
xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc(isa);
xtensa_insnbuf slotbuf = xtensa_insnbuf_alloc(isa);
bfd_byte *buffer = g_malloc(1);
int status = info->read_memory_func(memaddr, buffer, 1, info);
xtensa_format fmt;
int slot, slots;
unsigned len;
if (status) {
info->memory_error_func(status, memaddr, info);
len = -1;
goto out;
}
len = xtensa_isa_length_from_chars(isa, buffer);
if (len == XTENSA_UNDEFINED) {
info->fprintf_func(info->stream, ".byte 0x%02x", buffer[0]);
len = 1;
goto out;
}
buffer = g_realloc(buffer, len);
status = info->read_memory_func(memaddr + 1, buffer + 1, len - 1, info);
if (status) {
info->fprintf_func(info->stream, ".byte 0x%02x", buffer[0]);
info->memory_error_func(status, memaddr + 1, info);
len = 1;
goto out;
}
xtensa_insnbuf_from_chars(isa, insnbuf, buffer, len);
fmt = xtensa_format_decode(isa, insnbuf);
if (fmt == XTENSA_UNDEFINED) {
unsigned i;
for (i = 0; i < len; ++i) {
info->fprintf_func(info->stream, "%s 0x%02x",
i ? ", " : ".byte ", buffer[i]);
}
goto out;
}
slots = xtensa_format_num_slots(isa, fmt);
if (slots > 1) {
info->fprintf_func(info->stream, "{ ");
}
for (slot = 0; slot < slots; ++slot) {
xtensa_opcode opc;
int opnd, vopnd, opnds;
if (slot) {
info->fprintf_func(info->stream, "; ");
}
xtensa_format_get_slot(isa, fmt, slot, insnbuf, slotbuf);
opc = xtensa_opcode_decode(isa, fmt, slot, slotbuf);
if (opc == XTENSA_UNDEFINED) {
info->fprintf_func(info->stream, "???");
continue;
}
opnds = xtensa_opcode_num_operands(isa, opc);
info->fprintf_func(info->stream, "%s", xtensa_opcode_name(isa, opc));
for (opnd = vopnd = 0; opnd < opnds; ++opnd) {
if (xtensa_operand_is_visible(isa, opc, opnd)) {
uint32_t v = 0xbadc0de;
int rc;
info->fprintf_func(info->stream, vopnd ? ", " : "\t");
xtensa_operand_get_field(isa, opc, opnd, fmt, slot,
slotbuf, &v);
rc = xtensa_operand_decode(isa, opc, opnd, &v);
if (rc == XTENSA_UNDEFINED) {
info->fprintf_func(info->stream, "???");
} else if (xtensa_operand_is_register(isa, opc, opnd)) {
xtensa_regfile rf = xtensa_operand_regfile(isa, opc, opnd);
info->fprintf_func(info->stream, "%s%d",
xtensa_regfile_shortname(isa, rf), v);
} else if (xtensa_operand_is_PCrelative(isa, opc, opnd)) {
xtensa_operand_undo_reloc(isa, opc, opnd, &v, memaddr);
info->fprintf_func(info->stream, "0x%x", v);
} else {
info->fprintf_func(info->stream, "%d", v);
}
++vopnd;
}
}
}
if (slots > 1) {
info->fprintf_func(info->stream, " }");
}
out:
g_free(buffer);
xtensa_insnbuf_free(isa, insnbuf);
xtensa_insnbuf_free(isa, slotbuf);
return len;
}
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