#include "elf.h"
#include "qemu/qemu-print.h"
-#include "cpu.h"
#include "disas/disas.h"
#include "disas/capstone.h"
const char *prefix)
{
int i, n = info->buffer_length;
- uint8_t *buf = g_malloc(n);
+ g_autofree uint8_t *buf = g_malloc(n);
- info->read_memory_func(pc, buf, n, info);
-
- for (i = 0; i < n; ++i) {
- if (i % 32 == 0) {
- info->fprintf_func(info->stream, "\n%s: ", prefix);
+ if (info->read_memory_func(pc, buf, n, info) == 0) {
+ for (i = 0; i < n; ++i) {
+ if (i % 32 == 0) {
+ info->fprintf_func(info->stream, "\n%s: ", prefix);
+ }
+ info->fprintf_func(info->stream, "%02x", buf[i]);
}
- info->fprintf_func(info->stream, "%02x", buf[i]);
+ } else {
+ info->fprintf_func(info->stream, "unable to read memory");
}
-
- g_free(buf);
return n;
}
return print_insn_objdump(pc, info, "OBJD-T");
}
-#ifdef CONFIG_CAPSTONE
-/* Temporary storage for the capstone library. This will be alloced via
- malloc with a size private to the library; thus there's no reason not
- to share this across calls and across host vs target disassembly. */
-static __thread cs_insn *cap_insn;
-
-/* Initialize the Capstone library. */
-/* ??? It would be nice to cache this. We would need one handle for the
- host and one for the target. For most targets we can reset specific
- parameters via cs_option(CS_OPT_MODE, new_mode), but we cannot change
- CS_ARCH_* in this way. Thus we would need to be able to close and
- re-open the target handle with a different arch for the target in order
- to handle AArch64 vs AArch32 mode switching. */
-static cs_err cap_disas_start(disassemble_info *info, csh *handle)
-{
- cs_mode cap_mode = info->cap_mode;
- cs_err err;
-
- cap_mode += (info->endian == BFD_ENDIAN_BIG ? CS_MODE_BIG_ENDIAN
- : CS_MODE_LITTLE_ENDIAN);
-
- err = cs_open(info->cap_arch, cap_mode, handle);
- if (err != CS_ERR_OK) {
- return err;
- }
-
- /* ??? There probably ought to be a better place to put this. */
- if (info->cap_arch == CS_ARCH_X86) {
- /* We don't care about errors (if for some reason the library
- is compiled without AT&T syntax); the user will just have
- to deal with the Intel syntax. */
- cs_option(*handle, CS_OPT_SYNTAX, CS_OPT_SYNTAX_ATT);
- }
-
- /* "Disassemble" unknown insns as ".byte W,X,Y,Z". */
- cs_option(*handle, CS_OPT_SKIPDATA, CS_OPT_ON);
-
- /* Allocate temp space for cs_disasm_iter. */
- if (cap_insn == NULL) {
- cap_insn = cs_malloc(*handle);
- if (cap_insn == NULL) {
- cs_close(handle);
- return CS_ERR_MEM;
- }
- }
- 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)
-{
- uint8_t cap_buf[1024];
- csh handle;
- cs_insn *insn;
- size_t csize = 0;
-
- if (cap_disas_start(info, &handle) != CS_ERR_OK) {
- return false;
- }
- insn = cap_insn;
-
- while (1) {
- size_t tsize = MIN(sizeof(cap_buf) - csize, size);
- const uint8_t *cbuf = cap_buf;
-
- target_read_memory(pc + csize, cap_buf + csize, tsize, info);
- csize += tsize;
- size -= tsize;
-
- while (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
- cap_dump_insn(info, insn);
- }
-
- /* If the target memory is not consumed, go back for more... */
- if (size != 0) {
- /* ... taking care to move any remaining fractional insn
- to the beginning of the buffer. */
- if (csize != 0) {
- memmove(cap_buf, cbuf, csize);
- }
- continue;
- }
-
- /* Since the target memory is consumed, we should not have
- a remaining fractional insn. */
- if (csize != 0) {
- (*info->fprintf_func)(info->stream,
- "Disassembler disagrees with translator "
- "over instruction decoding\n"
- "Please report this to qemu-devel@nongnu.org\n");
- }
- break;
- }
-
- cs_close(&handle);
- return true;
-}
-
-/* Disassemble SIZE bytes at CODE for the host. */
-static bool cap_disas_host(disassemble_info *info, void *code, size_t size)
-{
- csh handle;
- const uint8_t *cbuf;
- cs_insn *insn;
- uint64_t pc;
-
- if (cap_disas_start(info, &handle) != CS_ERR_OK) {
- return false;
- }
- insn = cap_insn;
-
- cbuf = code;
- pc = (uintptr_t)code;
-
- while (cs_disasm_iter(handle, &cbuf, &size, &pc, insn)) {
- cap_dump_insn(info, insn);
- }
- if (size != 0) {
- (*info->fprintf_func)(info->stream,
- "Disassembler disagrees with TCG over instruction encoding\n"
- "Please report this to qemu-devel@nongnu.org\n");
- }
-
- cs_close(&handle);
- return true;
-}
-
-#if !defined(CONFIG_USER_ONLY)
-/* Disassemble COUNT insns at PC for the target. */
-static bool cap_disas_monitor(disassemble_info *info, uint64_t pc, int count)
-{
- uint8_t cap_buf[32];
- csh handle;
- cs_insn *insn;
- size_t csize = 0;
-
- if (cap_disas_start(info, &handle) != CS_ERR_OK) {
- return false;
- }
- insn = cap_insn;
-
- while (1) {
- /* We want to read memory for one insn, but generically we do not
- know how much memory that is. We have a small buffer which is
- known to be sufficient for all supported targets. Try to not
- read beyond the page, Just In Case. For even more simplicity,
- ignore the actual target page size and use a 1k boundary. If
- that turns out to be insufficient, we'll come back around the
- loop and read more. */
- uint64_t epc = QEMU_ALIGN_UP(pc + csize + 1, 1024);
- size_t tsize = MIN(sizeof(cap_buf) - csize, epc - pc);
- const uint8_t *cbuf = cap_buf;
-
- /* Make certain that we can make progress. */
- assert(tsize != 0);
- info->read_memory_func(pc, cap_buf + csize, tsize, info);
- csize += tsize;
-
- if (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
- cap_dump_insn(info, insn);
- if (--count <= 0) {
- break;
- }
- }
- memmove(cap_buf, cbuf, csize);
- }
-
- cs_close(&handle);
- return true;
-}
-#endif /* !CONFIG_USER_ONLY */
-#else
-# 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 */
-
static void initialize_debug(CPUDebug *s)
{
memset(s, 0, sizeof(*s));
s->cpu = cpu;
s->info.read_memory_func = target_read_memory;
s->info.print_address_func = print_address;
-#ifdef TARGET_WORDS_BIGENDIAN
+#if TARGET_BIG_ENDIAN
s->info.endian = BFD_ENDIAN_BIG;
#else
s->info.endian = BFD_ENDIAN_LITTLE;
s->info.read_memory_func = host_read_memory;
s->info.print_address_func = host_print_address;
-#ifdef HOST_WORDS_BIGENDIAN
+#if HOST_BIG_ENDIAN
s->info.endian = BFD_ENDIAN_BIG;
#else
s->info.endian = BFD_ENDIAN_LITTLE;
s->info.print_insn = print_insn_tci;
#elif defined(__i386__)
s->info.mach = bfd_mach_i386_i386;
- s->info.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;
- s->info.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";
- s->info.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(__aarch64__)
s->info.cap_arch = CS_ARCH_ARM64;
-# ifdef CONFIG_ARM_A64_DIS
- s->info.print_insn = print_insn_arm_a64;
-# endif
#elif defined(__alpha__)
s->info.print_insn = print_insn_alpha;
#elif defined(__sparc__)
s->info.mach = bfd_mach_sparc_v9b;
#elif defined(__arm__)
/* TCG only generates code for arm mode. */
- s->info.print_insn = print_insn_arm;
s->info.cap_arch = CS_ARCH_ARM;
#elif defined(__MIPSEB__)
s->info.print_insn = print_insn_big_mips;
#elif defined(__m68k__)
s->info.print_insn = print_insn_m68k;
#elif defined(__s390__)
- s->info.print_insn = print_insn_s390;
+ s->info.cap_arch = CS_ARCH_SYSZ;
+ s->info.cap_insn_unit = 2;
+ s->info.cap_insn_split = 6;
#elif defined(__hppa__)
s->info.print_insn = print_insn_hppa;
+#elif defined(__loongarch__)
+ s->info.print_insn = print_insn_loongarch;
#endif
}
}
}
-static int plugin_printf(FILE *stream, const char *fmt, ...)
+static int G_GNUC_PRINTF(2, 3)
+gstring_printf(FILE *stream, const char *fmt, ...)
{
/* We abuse the FILE parameter to pass a GString. */
GString *s = (GString *)stream;
}
-#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[64];
- const uint8_t *cbuf = cap_buf;
- csh handle;
-
- if (cap_disas_start(info, &handle) != CS_ERR_OK) {
- return false;
- }
-
- assert(size < sizeof(cap_buf));
- target_read_memory(pc, cap_buf, size, info);
-
- if (cs_disasm_iter(handle, &cbuf, &size, &pc, cap_insn)) {
- GString *s = (GString *)info->stream;
- g_string_printf(s, "%s %s", cap_insn->mnemonic, cap_insn->op_str);
- }
-
- 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
GString *ds = g_string_new(NULL);
initialize_debug_target(&s, cpu);
- s.info.fprintf_func = plugin_printf;
+ s.info.fprintf_func = gstring_printf;
s.info.stream = (FILE *)ds; /* abuse this slot */
s.info.buffer_vma = addr;
s.info.buffer_length = size;
}
/* Disassemble this for me please... (debugging). */
-void disas(FILE *out, void *code, unsigned long size)
+void disas(FILE *out, const void *code, unsigned long size)
{
uintptr_t pc;
int count;
{
int count, i;
CPUDebug s;
+ g_autoptr(GString) ds = g_string_new("");
initialize_debug_target(&s, cpu);
- s.info.fprintf_func = qemu_fprintf;
+ s.info.fprintf_func = gstring_printf;
+ s.info.stream = (FILE *)ds; /* abuse this slot */
+
if (is_physical) {
s.info.read_memory_func = physical_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;
}
return;
}
- for(i = 0; i < nb_insn; i++) {
- monitor_printf(mon, "0x" TARGET_FMT_lx ": ", pc);
+ for (i = 0; i < nb_insn; i++) {
+ g_string_append_printf(ds, "0x" TARGET_FMT_lx ": ", pc);
count = s.info.print_insn(pc, &s.info);
- monitor_printf(mon, "\n");
- if (count < 0)
- break;
+ g_string_append_c(ds, '\n');
+ if (count < 0) {
+ break;
+ }
pc += count;
}
+
+ monitor_puts(mon, ds->str);
}
#endif
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