disas/disas-mon.c

   1 /*
   2  * Functions related to disassembly from the monitor
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "qemu/osdep.h"
   8 #include "disas-internal.h"
   9 #include "disas/disas.h"
  10 #include "exec/memory.h"
  11 #include "hw/core/cpu.h"
  12 #include "monitor/monitor.h"
  13
  14 static int
  15 physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
  16                      struct disassemble_info *info)
  17 {
  18     CPUDebug *s = container_of(info, CPUDebug, info);
  19     MemTxResult res;
  20
  21     res = address_space_read(s->cpu->as, memaddr, MEMTXATTRS_UNSPECIFIED,
  22                              myaddr, length);
  23     return res == MEMTX_OK ? 0 : EIO;
  24 }
  25
  26 /* Disassembler for the monitor.  */
  27 void monitor_disas(Monitor *mon, CPUState *cpu, uint64_t pc,
  28                    int nb_insn, bool is_physical)
  29 {
  30     int count, i;
  31     CPUDebug s;
  32     g_autoptr(GString) ds = g_string_new("");
  33
  34     disas_initialize_debug_target(&s, cpu);
  35     s.info.fprintf_func = disas_gstring_printf;
  36     s.info.stream = (FILE *)ds;  /* abuse this slot */
  37
  38     if (is_physical) {
  39         s.info.read_memory_func = physical_read_memory;
  40     }
  41     s.info.buffer_vma = pc;
  42
  43     if (s.info.cap_arch >= 0 && cap_disas_monitor(&s.info, pc, nb_insn)) {
  44         monitor_puts(mon, ds->str);
  45         return;
  46     }
  47
  48     if (!s.info.print_insn) {
  49         monitor_printf(mon, "0x%08" PRIx64
  50                        ": Asm output not supported on this arch\n", pc);
  51         return;
  52     }
  53
  54     for (i = 0; i < nb_insn; i++) {
  55         g_string_append_printf(ds, "0x%08" PRIx64 ":  ", pc);
  56         count = s.info.print_insn(pc, &s.info);
  57         g_string_append_c(ds, '\n');
  58         if (count < 0) {
  59             break;
  60         }
  61         pc += count;
  62     }
  63
  64     monitor_puts(mon, ds->str);
  65 }