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/*
* Functions related to disassembly from the monitor
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "disas-internal.h"
#include "disas/disas.h"
#include "exec/memory.h"
#include "hw/core/cpu.h"
#include "monitor/monitor.h"
/*
* Get LENGTH bytes from info's buffer, at target address memaddr.
* Transfer them to myaddr.
*/
static int
virtual_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
CPUDebug *s = container_of(info, CPUDebug, info);
int r = cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0);
return r ? EIO : 0;
}
static int
physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
CPUDebug *s = container_of(info, CPUDebug, info);
MemTxResult res;
res = address_space_read(s->cpu->as, memaddr, MEMTXATTRS_UNSPECIFIED,
myaddr, length);
return res == MEMTX_OK ? 0 : EIO;
}
/* Disassembler for the monitor. */
void monitor_disas(Monitor *mon, CPUState *cpu, uint64_t pc,
int nb_insn, bool is_physical)
{
int count, i;
CPUDebug s;
g_autoptr(GString) ds = g_string_new("");
disas_initialize_debug_target(&s, cpu);
s.info.fprintf_func = disas_gstring_printf;
s.info.stream = (FILE *)ds; /* abuse this slot */
s.info.show_opcodes = true;
if (is_physical) {
s.info.read_memory_func = physical_read_memory;
} else {
s.info.read_memory_func = virtual_read_memory;
}
s.info.buffer_vma = pc;
if (s.info.cap_arch >= 0 && cap_disas_monitor(&s.info, pc, nb_insn)) {
monitor_puts(mon, ds->str);
return;
}
if (!s.info.print_insn) {
monitor_printf(mon, "0x%08" PRIx64
": Asm output not supported on this arch\n", pc);
return;
}
for (i = 0; i < nb_insn; i++) {
g_string_append_printf(ds, "0x%08" PRIx64 ": ", pc);
count = s.info.print_insn(pc, &s.info);
g_string_append_c(ds, '\n');
if (count < 0) {
break;
}
pc += count;
}
monitor_puts(mon, ds->str);
}
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