The Hexagon disassembler calls disassemble_hexagon to decode a packet and format it for printing
Signed-off-by: Taylor Simpson <tsimp...@quicinc.com> --- include/disas/dis-asm.h | 1 + disas/hexagon.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++ disas/Makefile.objs | 1 + 3 files changed, 64 insertions(+) create mode 100644 disas/hexagon.c diff --git a/include/disas/dis-asm.h b/include/disas/dis-asm.h index f87f468..a7fa82d 100644 --- a/include/disas/dis-asm.h +++ b/include/disas/dis-asm.h @@ -436,6 +436,7 @@ int print_insn_little_nios2 (bfd_vma, disassemble_info*); int print_insn_xtensa (bfd_vma, disassemble_info*); int print_insn_riscv32 (bfd_vma, disassemble_info*); int print_insn_riscv64 (bfd_vma, disassemble_info*); +int print_insn_hexagon (bfd_vma, disassemble_info*); #if 0 /* Fetch the disassembler for a given BFD, if that support is available. */ diff --git a/disas/hexagon.c b/disas/hexagon.c new file mode 100644 index 0000000..6ee8653 --- /dev/null +++ b/disas/hexagon.c @@ -0,0 +1,62 @@ +/* + * Copyright(c) 2019-2020 Qualcomm Innovation Center, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +/* + * QEMU Hexagon Disassembler + */ + +#include "qemu/osdep.h" +#include "disas/dis-asm.h" +#include "target/hexagon/cpu_bits.h" + +/* + * We will disassemble a packet with up to 4 instructions, so we need + * a hefty size buffer. + */ +#define PACKET_BUFFER_LEN 1028 + +int print_insn_hexagon(bfd_vma memaddr, struct disassemble_info *info) +{ + uint32_t words[PACKET_WORDS_MAX]; + int len, slen; + char buf[PACKET_BUFFER_LEN]; + int status; + int i; + + for (i = 0; i < PACKET_WORDS_MAX; i++) { + status = (*info->read_memory_func)(memaddr + i * sizeof(uint32_t), + (bfd_byte *)&words[i], + sizeof(uint32_t), info); + if (status) { + if (i > 0) { + break; + } + (*info->memory_error_func)(status, memaddr, info); + return status; + } + } + + len = disassemble_hexagon(words, i, buf, PACKET_BUFFER_LEN); + slen = strlen(buf); + if (buf[slen - 1] == '\n') { + buf[slen - 1] = '\0'; + } + (*info->fprintf_func)(info->stream, "%s", buf); + + return len; +} + diff --git a/disas/Makefile.objs b/disas/Makefile.objs index 3c1cdce..0e86964 100644 --- a/disas/Makefile.objs +++ b/disas/Makefile.objs @@ -24,6 +24,7 @@ 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 +common-obj-$(CONFIG_HEXAGON_DIS) += hexagon.o # TODO: As long as the TCG interpreter and its generated code depend # on the QEMU target, we cannot compile the disassembler here. -- 2.7.4
