| 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 "system/memory.h" |
| 11 | #include "hw/core/cpu.h" |
| 12 | #include "monitor/monitor.h" |
| 13 | #include "monitor/hmp.h" |
| 14 | |
| 15 | /* |
| 16 | * Get LENGTH bytes from info's buffer, at target address memaddr. |
| 17 | * Transfer them to myaddr. |
| 18 | */ |
| 19 | static int |
| 20 | virtual_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, |
| 21 | struct disassemble_info *info) |
| 22 | { |
| 23 | CPUDebug *s = container_of(info, CPUDebug, info); |
| 24 | int r = cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0); |
| 25 | return r ? EIO : 0; |
| 26 | } |
| 27 | |
| 28 | static int |
| 29 | physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, |
| 30 | struct disassemble_info *info) |
| 31 | { |
| 32 | CPUDebug *s = container_of(info, CPUDebug, info); |
| 33 | MemTxResult res; |
| 34 | |
| 35 | res = address_space_read(s->cpu->as, memaddr, MEMTXATTRS_UNSPECIFIED, |
| 36 | myaddr, length); |
| 37 | return res == MEMTX_OK ? 0 : EIO; |
| 38 | } |
| 39 | |
| 40 | /* Disassembler for the monitor. */ |
| 41 | void monitor_disas(MonitorHMP *hmp, CPUState *cpu, uint64_t pc, |
| 42 | int nb_insn, bool is_physical) |
| 43 | { |
| 44 | int count, i; |
| 45 | CPUDebug s; |
| 46 | g_autoptr(GString) ds = g_string_new(""); |
| 47 | |
| 48 | disas_initialize_debug_target(&s, cpu); |
| 49 | s.info.fprintf_func = disas_gstring_printf; |
| 50 | s.info.stream = (FILE *)ds; /* abuse this slot */ |
| 51 | s.info.show_opcodes = true; |
| 52 | |
| 53 | if (is_physical) { |
| 54 | s.info.read_memory_func = physical_read_memory; |
| 55 | } else { |
| 56 | s.info.read_memory_func = virtual_read_memory; |
| 57 | } |
| 58 | s.info.buffer_vma = pc; |
| 59 | |
| 60 | if (s.info.cap_arch >= 0 && cap_disas_monitor(&s.info, pc, nb_insn)) { |
| 61 | monitor_puts(MONITOR(hmp), ds->str); |
| 62 | return; |
| 63 | } |
| 64 | |
| 65 | if (!s.info.print_insn) { |
| 66 | monitor_hmp_printf(hmp, "0x%08" PRIx64 |
| 67 | ": Asm output not supported on this arch\n", pc); |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | for (i = 0; i < nb_insn; i++) { |
| 72 | g_string_append_printf(ds, "0x%08" PRIx64 ": ", pc); |
| 73 | count = s.info.print_insn(pc, &s.info); |
| 74 | g_string_append_c(ds, '\n'); |
| 75 | if (count < 0) { |
| 76 | break; |
| 77 | } |
| 78 | pc += count; |
| 79 | } |
| 80 | |
| 81 | monitor_puts(MONITOR(hmp), ds->str); |
| 82 | } |