diff options
Diffstat (limited to 'disas')
| -rw-r--r-- | disas/Makefile.objs | 1 | ||||
| -rw-r--r-- | disas/xtensa.c | 133 |
2 files changed, 134 insertions, 0 deletions
diff --git a/disas/Makefile.objs b/disas/Makefile.objs index 194648fb1a..53556f8f5a 100644 --- a/disas/Makefile.objs +++ b/disas/Makefile.objs @@ -21,6 +21,7 @@ common-obj-$(CONFIG_S390_DIS) += s390.o common-obj-$(CONFIG_SH4_DIS) += sh4.o common-obj-$(CONFIG_SPARC_DIS) += sparc.o common-obj-$(CONFIG_LM32_DIS) += lm32.o +common-obj-$(CONFIG_XTENSA_DIS) += xtensa.o # TODO: As long as the TCG interpreter and its generated code depend # on the QEMU target, we cannot compile the disassembler here. diff --git a/disas/xtensa.c b/disas/xtensa.c new file mode 100644 index 0000000000..114326a4fc --- /dev/null +++ b/disas/xtensa.c @@ -0,0 +1,133 @@ +/* + * 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/bfd.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; + unsigned 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; + unsigned 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; +} |