/* General "disassemble this chunk" code. Used for debugging. */
#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "disas/bfd.h"
+#include "disas/dis-asm.h"
#include "elf.h"
+#include "qemu/qemu-print.h"
#include "cpu.h"
#include "disas/disas.h"
return CS_ERR_OK;
}
+static void cap_dump_insn_units(disassemble_info *info, cs_insn *insn,
+ int i, int n)
+{
+ fprintf_function print = info->fprintf_func;
+ FILE *stream = info->stream;
+
+ switch (info->cap_insn_unit) {
+ case 4:
+ if (info->endian == BFD_ENDIAN_BIG) {
+ for (; i < n; i += 4) {
+ print(stream, " %08x", ldl_be_p(insn->bytes + i));
+
+ }
+ } else {
+ for (; i < n; i += 4) {
+ print(stream, " %08x", ldl_le_p(insn->bytes + i));
+ }
+ }
+ break;
+
+ case 2:
+ if (info->endian == BFD_ENDIAN_BIG) {
+ for (; i < n; i += 2) {
+ print(stream, " %04x", lduw_be_p(insn->bytes + i));
+ }
+ } else {
+ for (; i < n; i += 2) {
+ print(stream, " %04x", lduw_le_p(insn->bytes + i));
+ }
+ }
+ break;
+
+ default:
+ for (; i < n; i++) {
+ print(stream, " %02x", insn->bytes[i]);
+ }
+ break;
+ }
+}
+
+static void cap_dump_insn(disassemble_info *info, cs_insn *insn)
+{
+ fprintf_function print = info->fprintf_func;
+ int i, n, split;
+
+ print(info->stream, "0x%08" PRIx64 ": ", insn->address);
+
+ n = insn->size;
+ split = info->cap_insn_split;
+
+ /* Dump the first SPLIT bytes of the instruction. */
+ cap_dump_insn_units(info, insn, 0, MIN(n, split));
+
+ /* Add padding up to SPLIT so that mnemonics line up. */
+ if (n < split) {
+ int width = (split - n) / info->cap_insn_unit;
+ width *= (2 * info->cap_insn_unit + 1);
+ print(info->stream, "%*s", width, "");
+ }
+
+ /* Print the actual instruction. */
+ print(info->stream, " %-8s %s\n", insn->mnemonic, insn->op_str);
+
+ /* Dump any remaining part of the insn on subsequent lines. */
+ for (i = split; i < n; i += split) {
+ print(info->stream, "0x%08" PRIx64 ": ", insn->address + i);
+ cap_dump_insn_units(info, insn, i, MIN(n, i + split));
+ print(info->stream, "\n");
+ }
+}
+
/* Disassemble SIZE bytes at PC for the target. */
static bool cap_disas_target(disassemble_info *info, uint64_t pc, size_t size)
{
size -= tsize;
while (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
- (*info->fprintf_func)(info->stream,
- "0x%08" PRIx64 ": %-12s %s\n",
- insn->address, insn->mnemonic,
- insn->op_str);
+ cap_dump_insn(info, insn);
}
/* If the target memory is not consumed, go back for more... */
pc = (uintptr_t)code;
while (cs_disasm_iter(handle, &cbuf, &size, &pc, insn)) {
- (*info->fprintf_func)(info->stream,
- "0x%08" PRIx64 ": %-12s %s\n",
- insn->address, insn->mnemonic,
- insn->op_str);
+ cap_dump_insn(info, insn);
}
if (size != 0) {
(*info->fprintf_func)(info->stream,
csize += tsize;
if (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
- (*info->fprintf_func)(info->stream,
- "0x%08" PRIx64 ": %-12s %s\n",
- insn->address, insn->mnemonic,
- insn->op_str);
+ cap_dump_insn(info, insn);
if (--count <= 0) {
break;
}
# define cap_disas_target(i, p, s) false
# define cap_disas_host(i, p, s) false
# define cap_disas_monitor(i, p, c) false
+# define cap_disas_plugin(i, p, c) false
#endif /* CONFIG_CAPSTONE */
/* Disassemble this for me please... (debugging). */
s.info.print_address_func = generic_print_address;
s.info.cap_arch = -1;
s.info.cap_mode = 0;
+ s.info.cap_insn_unit = 4;
+ s.info.cap_insn_split = 4;
#ifdef TARGET_WORDS_BIGENDIAN
s.info.endian = BFD_ENDIAN_BIG;
}
}
+static __thread GString plugin_disas_output;
+
+static int plugin_printf(FILE *stream, const char *fmt, ...)
+{
+ va_list va;
+ GString *s = &plugin_disas_output;
+ int initial_len = s->len;
+
+ va_start(va, fmt);
+ g_string_append_vprintf(s, fmt, va);
+ va_end(va);
+
+ return s->len - initial_len;
+}
+
+static void plugin_print_address(bfd_vma addr, struct disassemble_info *info)
+{
+ /* does nothing */
+}
+
+
+#ifdef CONFIG_CAPSTONE
+/* Disassemble a single instruction directly into plugin output */
+static
+bool cap_disas_plugin(disassemble_info *info, uint64_t pc, size_t size)
+{
+ uint8_t cap_buf[1024];
+ csh handle;
+ cs_insn *insn;
+ size_t csize = 0;
+ int count;
+ GString *s = &plugin_disas_output;
+
+ if (cap_disas_start(info, &handle) != CS_ERR_OK) {
+ return false;
+ }
+ insn = cap_insn;
+
+ size_t tsize = MIN(sizeof(cap_buf) - csize, size);
+ const uint8_t *cbuf = cap_buf;
+ target_read_memory(pc, cap_buf, tsize, info);
+
+ count = cs_disasm(handle, cbuf, size, 0, 1, &insn);
+
+ if (count) {
+ g_string_printf(s, "%s %s", insn->mnemonic, insn->op_str);
+ } else {
+ g_string_printf(s, "cs_disasm failed");
+ }
+
+ cs_close(&handle);
+ return true;
+}
+#endif
+
+/*
+ * We should only be dissembling one instruction at a time here. If
+ * there is left over it usually indicates the front end has read more
+ * bytes than it needed.
+ */
+char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+ int count;
+ CPUDebug s;
+ GString *ds = g_string_set_size(&plugin_disas_output, 0);
+
+ g_assert(ds == &plugin_disas_output);
+
+ INIT_DISASSEMBLE_INFO(s.info, NULL, plugin_printf);
+
+ s.cpu = cpu;
+ s.info.read_memory_func = target_read_memory;
+ s.info.buffer_vma = addr;
+ s.info.buffer_length = size;
+ s.info.print_address_func = plugin_print_address;
+ s.info.cap_arch = -1;
+ s.info.cap_mode = 0;
+ s.info.cap_insn_unit = 4;
+ s.info.cap_insn_split = 4;
+
+#ifdef TARGET_WORDS_BIGENDIAN
+ s.info.endian = BFD_ENDIAN_BIG;
+#else
+ s.info.endian = BFD_ENDIAN_LITTLE;
+#endif
+
+ if (cc->disas_set_info) {
+ cc->disas_set_info(cpu, &s.info);
+ }
+
+ if (s.info.cap_arch >= 0 && cap_disas_plugin(&s.info, addr, size)) {
+ return g_strdup(ds->str);
+ }
+
+ if (s.info.print_insn == NULL) {
+ s.info.print_insn = print_insn_od_target;
+ }
+
+ count = s.info.print_insn(addr, &s.info);
+
+ /* The decoder probably read more than it needed it's not critical */
+ if (count < size) {
+ warn_report("%s: %zu bytes left over", __func__, size - count);
+ }
+
+ return g_strdup(ds->str);
+}
+
/* Disassemble this for me please... (debugging). */
void disas(FILE *out, void *code, unsigned long size)
{
s.info.buffer_length = size;
s.info.cap_arch = -1;
s.info.cap_mode = 0;
+ s.info.cap_insn_unit = 4;
+ s.info.cap_insn_split = 4;
#ifdef HOST_WORDS_BIGENDIAN
s.info.endian = BFD_ENDIAN_BIG;
print_insn = print_insn_i386;
s.info.cap_arch = CS_ARCH_X86;
s.info.cap_mode = CS_MODE_32;
+ s.info.cap_insn_unit = 1;
+ s.info.cap_insn_split = 8;
#elif defined(__x86_64__)
s.info.mach = bfd_mach_x86_64;
print_insn = print_insn_i386;
s.info.cap_arch = CS_ARCH_X86;
s.info.cap_mode = CS_MODE_64;
+ s.info.cap_insn_unit = 1;
+ s.info.cap_insn_split = 8;
#elif defined(_ARCH_PPC)
s.info.disassembler_options = (char *)"any";
print_insn = print_insn_ppc;
+ s.info.cap_arch = CS_ARCH_PPC;
+# ifdef _ARCH_PPC64
+ s.info.cap_mode = CS_MODE_64;
+# endif
+#elif defined(__riscv) && defined(CONFIG_RISCV_DIS)
+#if defined(_ILP32) || (__riscv_xlen == 32)
+ print_insn = print_insn_riscv32;
+#elif defined(_LP64)
+ print_insn = print_insn_riscv64;
+#else
+#error unsupported RISC-V ABI
+#endif
#elif defined(__aarch64__) && defined(CONFIG_ARM_A64_DIS)
print_insn = print_insn_arm_a64;
s.info.cap_arch = CS_ARCH_ARM64;
#include "monitor/monitor.h"
-static int monitor_disas_is_physical;
-
static int
-monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
+physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
CPUDebug *s = container_of(info, CPUDebug, info);
- if (monitor_disas_is_physical) {
- cpu_physical_memory_read(memaddr, myaddr, length);
- } else {
- cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0);
- }
+ address_space_read(s->cpu->as, memaddr, MEMTXATTRS_UNSPECIFIED,
+ myaddr, length);
return 0;
}
int count, i;
CPUDebug s;
- INIT_DISASSEMBLE_INFO(s.info, (FILE *)mon, monitor_fprintf);
+ INIT_DISASSEMBLE_INFO(s.info, NULL, qemu_fprintf);
s.cpu = cpu;
- monitor_disas_is_physical = is_physical;
- s.info.read_memory_func = monitor_read_memory;
+ s.info.read_memory_func
+ = (is_physical ? physical_read_memory : target_read_memory);
s.info.print_address_func = generic_print_address;
s.info.buffer_vma = pc;
s.info.cap_arch = -1;
s.info.cap_mode = 0;
+ s.info.cap_insn_unit = 4;
+ s.info.cap_insn_split = 4;
#ifdef TARGET_WORDS_BIGENDIAN
s.info.endian = BFD_ENDIAN_BIG;
projects / thirdparty / qemu.git / blobdiff