/* 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"
/* Filled in by elfload.c. Simplistic, but will do for now. */
struct syminfo *syminfos = NULL;
-/* Get LENGTH bytes from info's buffer, at target address memaddr.
- Transfer them to myaddr. */
-int
-buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
- struct disassemble_info *info)
+/*
+ * Get LENGTH bytes from info's buffer, at host address memaddr.
+ * Transfer them to myaddr.
+ */
+static int host_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
+ struct disassemble_info *info)
{
if (memaddr < info->buffer_vma
- || memaddr + length > info->buffer_vma + info->buffer_length)
+ || memaddr + length > info->buffer_vma + info->buffer_length) {
/* Out of bounds. Use EIO because GDB uses it. */
return EIO;
+ }
memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
return 0;
}
-/* Get LENGTH bytes from info's buffer, at target address memaddr.
- Transfer them to myaddr. */
-static int
-target_read_memory (bfd_vma memaddr,
- bfd_byte *myaddr,
- int length,
- struct disassemble_info *info)
+/*
+ * Get LENGTH bytes from info's buffer, at target address memaddr.
+ * Transfer them to myaddr.
+ */
+static int target_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
+ struct disassemble_info *info)
{
CPUDebug *s = container_of(info, CPUDebug, info);
-
- cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0);
- return 0;
+ int r = cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0);
+ return r ? EIO : 0;
}
-/* Print an error message. We can assume that this is in response to
- an error return from buffer_read_memory. */
-void
-perror_memory (int status, bfd_vma memaddr, struct disassemble_info *info)
+/*
+ * Print an error message. We can assume that this is in response to
+ * an error return from {host,target}_read_memory.
+ */
+static void perror_memory(int status, bfd_vma memaddr,
+ struct disassemble_info *info)
{
- if (status != EIO)
- /* Can't happen. */
- (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
- else
- /* Actually, address between memaddr and memaddr + len was
- out of bounds. */
- (*info->fprintf_func) (info->stream,
- "Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
+ if (status != EIO) {
+ /* Can't happen. */
+ info->fprintf_func(info->stream, "Unknown error %d\n", status);
+ } else {
+ /* Address between memaddr and memaddr + len was out of bounds. */
+ info->fprintf_func(info->stream,
+ "Address 0x%" PRIx64 " is out of bounds.\n",
+ memaddr);
+ }
}
-/* This could be in a separate file, to save minuscule amounts of space
- in statically linked executables. */
-
-/* Just print the address is hex. This is included for completeness even
- though both GDB and objdump provide their own (to print symbolic
- addresses). */
-
-void
-generic_print_address (bfd_vma addr, struct disassemble_info *info)
+/* Print address in hex. */
+static void print_address(bfd_vma addr, struct disassemble_info *info)
{
- (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
+ info->fprintf_func(info->stream, "0x%" PRIx64, addr);
}
/* Print address in hex, truncated to the width of a host virtual address. */
-static void
-generic_print_host_address(bfd_vma addr, struct disassemble_info *info)
+static void host_print_address(bfd_vma addr, struct disassemble_info *info)
{
- uint64_t mask = ~0ULL >> (64 - (sizeof(void *) * 8));
- generic_print_address(addr & mask, info);
+ print_address((uintptr_t)addr, info);
}
-/* Just return the given address. */
-
-int
-generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info)
+/* Stub prevents some fruitless earching in optabs disassemblers. */
+static int symbol_at_address(bfd_vma addr, struct disassemble_info *info)
{
- return 1;
+ return 1;
}
bfd_vma bfd_getl64 (const bfd_byte *addr)
size -= tsize;
while (cs_disasm_iter(handle, &cbuf, &csize, &pc, insn)) {
- cap_dump_insn(info, insn);
+ 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)) {
- cap_dump_insn(info, insn);
+ cap_dump_insn(info, insn);
}
if (size != 0) {
(*info->fprintf_func)(info->stream,
# 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->info.arch = bfd_arch_unknown;
+ s->info.cap_arch = -1;
+ s->info.cap_insn_unit = 4;
+ s->info.cap_insn_split = 4;
+ s->info.memory_error_func = perror_memory;
+ s->info.symbol_at_address_func = symbol_at_address;
+}
+
+static void initialize_debug_target(CPUDebug *s, CPUState *cpu)
+{
+ initialize_debug(s);
+
+ s->cpu = cpu;
+ s->info.read_memory_func = target_read_memory;
+ s->info.print_address_func = print_address;
+#ifdef TARGET_WORDS_BIGENDIAN
+ s->info.endian = BFD_ENDIAN_BIG;
+#else
+ s->info.endian = BFD_ENDIAN_LITTLE;
+#endif
+
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+ if (cc->disas_set_info) {
+ cc->disas_set_info(cpu, &s->info);
+ }
+}
+
+static void initialize_debug_host(CPUDebug *s)
+{
+ initialize_debug(s);
+
+ s->info.read_memory_func = host_read_memory;
+ s->info.print_address_func = host_print_address;
+#ifdef HOST_WORDS_BIGENDIAN
+ s->info.endian = BFD_ENDIAN_BIG;
+#else
+ s->info.endian = BFD_ENDIAN_LITTLE;
+#endif
+#if defined(CONFIG_TCG_INTERPRETER)
+ 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(__riscv) && defined(CONFIG_RISCV_DIS)
+#if defined(_ILP32) || (__riscv_xlen == 32)
+ s->info.print_insn = print_insn_riscv32;
+#elif defined(_LP64)
+ s->info.print_insn = print_insn_riscv64;
+#else
+#error unsupported RISC-V ABI
+#endif
+#elif defined(__aarch64__) && defined(CONFIG_ARM_A64_DIS)
+ s->info.print_insn = print_insn_arm_a64;
+ s->info.cap_arch = CS_ARCH_ARM64;
+#elif defined(__alpha__)
+ s->info.print_insn = print_insn_alpha;
+#elif defined(__sparc__)
+ s->info.print_insn = print_insn_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(__MIPSEL__)
+ s->info.print_insn = print_insn_little_mips;
+#elif defined(__m68k__)
+ s->info.print_insn = print_insn_m68k;
+#elif defined(__s390__)
+ s->info.print_insn = print_insn_s390;
+#elif defined(__hppa__)
+ s->info.print_insn = print_insn_hppa;
+#endif
+}
+
/* Disassemble this for me please... (debugging). */
void target_disas(FILE *out, CPUState *cpu, target_ulong code,
target_ulong size)
{
- CPUClass *cc = CPU_GET_CLASS(cpu);
target_ulong pc;
int count;
CPUDebug s;
- INIT_DISASSEMBLE_INFO(s.info, out, fprintf);
-
- s.cpu = cpu;
- s.info.read_memory_func = target_read_memory;
+ initialize_debug_target(&s, cpu);
+ s.info.fprintf_func = fprintf;
+ s.info.stream = out;
s.info.buffer_vma = code;
s.info.buffer_length = size;
- 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;
-#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_target(&s.info, code, size)) {
return;
}
}
+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)
+{
+ int count;
+ CPUDebug s;
+ GString *ds = g_string_set_size(&plugin_disas_output, 0);
+
+ g_assert(ds == &plugin_disas_output);
+
+ initialize_debug_target(&s, cpu);
+ s.info.fprintf_func = plugin_printf;
+ s.info.buffer_vma = addr;
+ s.info.buffer_length = size;
+ s.info.print_address_func = plugin_print_address;
+
+ 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)
{
uintptr_t pc;
int count;
CPUDebug s;
- int (*print_insn)(bfd_vma pc, disassemble_info *info) = NULL;
-
- INIT_DISASSEMBLE_INFO(s.info, out, fprintf);
- s.info.print_address_func = generic_print_host_address;
+ initialize_debug_host(&s);
+ s.info.fprintf_func = fprintf;
+ s.info.stream = out;
s.info.buffer = code;
s.info.buffer_vma = (uintptr_t)code;
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;
-#else
- s.info.endian = BFD_ENDIAN_LITTLE;
-#endif
-#if defined(CONFIG_TCG_INTERPRETER)
- print_insn = print_insn_tci;
-#elif defined(__i386__)
- s.info.mach = bfd_mach_i386_i386;
- 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(__aarch64__) && defined(CONFIG_ARM_A64_DIS)
- print_insn = print_insn_arm_a64;
- s.info.cap_arch = CS_ARCH_ARM64;
-#elif defined(__alpha__)
- print_insn = print_insn_alpha;
-#elif defined(__sparc__)
- print_insn = print_insn_sparc;
- s.info.mach = bfd_mach_sparc_v9b;
-#elif defined(__arm__)
- print_insn = print_insn_arm;
- s.info.cap_arch = CS_ARCH_ARM;
- /* TCG only generates code for arm mode. */
-#elif defined(__MIPSEB__)
- print_insn = print_insn_big_mips;
-#elif defined(__MIPSEL__)
- print_insn = print_insn_little_mips;
-#elif defined(__m68k__)
- print_insn = print_insn_m68k;
-#elif defined(__s390__)
- print_insn = print_insn_s390;
-#elif defined(__hppa__)
- print_insn = print_insn_hppa;
-#endif
if (s.info.cap_arch >= 0 && cap_disas_host(&s.info, code, size)) {
return;
}
- if (print_insn == NULL) {
- print_insn = print_insn_od_host;
+ if (s.info.print_insn == NULL) {
+ s.info.print_insn = print_insn_od_host;
}
for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) {
fprintf(out, "0x%08" PRIxPTR ": ", pc);
- count = print_insn(pc, &s.info);
- fprintf(out, "\n");
- if (count < 0)
- break;
+ count = s.info.print_insn(pc, &s.info);
+ fprintf(out, "\n");
+ if (count < 0) {
+ break;
+ }
}
+
}
/* Look up symbol for debugging purpose. Returns "" if unknown. */
physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
- cpu_physical_memory_read(memaddr, myaddr, length);
- return 0;
+ 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,
target_ulong pc, int nb_insn, int is_physical)
{
- CPUClass *cc = CPU_GET_CLASS(cpu);
int count, i;
CPUDebug s;
- INIT_DISASSEMBLE_INFO(s.info, (FILE *)mon, monitor_fprintf);
-
- s.cpu = cpu;
- 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;
-#else
- s.info.endian = BFD_ENDIAN_LITTLE;
-#endif
-
- if (cc->disas_set_info) {
- cc->disas_set_info(cpu, &s.info);
+ initialize_debug_target(&s, cpu);
+ s.info.fprintf_func = qemu_fprintf;
+ 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)) {
return;
projects / mirror_qemu.git / blobdiff