/* 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"
+#include "disas/capstone.h"
typedef struct CPUDebug {
struct disassemble_info info;
/* 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)
-{
- uint64_t mask = ~0ULL >> (64 - (sizeof(void *) * 8));
- generic_print_address(addr & mask, info);
-}
-
-/* Just return the given address. */
-
-int
-generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info)
-{
- return 1;
-}
-
-bfd_vma bfd_getl64 (const bfd_byte *addr)
-{
- unsigned long long v;
-
- v = (unsigned long long) addr[0];
- v |= (unsigned long long) addr[1] << 8;
- v |= (unsigned long long) addr[2] << 16;
- v |= (unsigned long long) addr[3] << 24;
- v |= (unsigned long long) addr[4] << 32;
- v |= (unsigned long long) addr[5] << 40;
- v |= (unsigned long long) addr[6] << 48;
- v |= (unsigned long long) addr[7] << 56;
- return (bfd_vma) v;
-}
-
-bfd_vma bfd_getl32 (const bfd_byte *addr)
-{
- unsigned long v;
-
- v = (unsigned long) addr[0];
- v |= (unsigned long) addr[1] << 8;
- v |= (unsigned long) addr[2] << 16;
- v |= (unsigned long) addr[3] << 24;
- return (bfd_vma) v;
-}
-
-bfd_vma bfd_getb32 (const bfd_byte *addr)
+static void host_print_address(bfd_vma addr, struct disassemble_info *info)
{
- unsigned long v;
-
- v = (unsigned long) addr[0] << 24;
- v |= (unsigned long) addr[1] << 16;
- v |= (unsigned long) addr[2] << 8;
- v |= (unsigned long) addr[3];
- return (bfd_vma) v;
+ print_address((uintptr_t)addr, info);
}
-bfd_vma bfd_getl16 (const bfd_byte *addr)
+/* Stub prevents some fruitless earching in optabs disassemblers. */
+static int symbol_at_address(bfd_vma addr, struct disassemble_info *info)
{
- unsigned long v;
-
- v = (unsigned long) addr[0];
- v |= (unsigned long) addr[1] << 8;
- return (bfd_vma) v;
-}
-
-bfd_vma bfd_getb16 (const bfd_byte *addr)
-{
- unsigned long v;
-
- v = (unsigned long) addr[0] << 24;
- v |= (unsigned long) addr[1] << 16;
- return (bfd_vma) v;
+ return 1;
}
static int print_insn_objdump(bfd_vma pc, disassemble_info *info,
return print_insn_objdump(pc, info, "OBJD-T");
}
-/* Disassemble this for me please... (debugging). 'flags' has the following
- values:
- i386 - 1 means 16 bit code, 2 means 64 bit code
- ppc - bits 0:15 specify (optionally) the machine instruction set;
- bit 16 indicates little endian.
- other targets - unused
- */
-void target_disas(FILE *out, CPUState *cpu, target_ulong code,
- target_ulong size, int flags)
+static void initialize_debug(CPUDebug *s)
{
- CPUClass *cc = CPU_GET_CLASS(cpu);
- target_ulong pc;
- int count;
- CPUDebug s;
-
- INIT_DISASSEMBLE_INFO(s.info, out, fprintf);
+ 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;
+}
- s.cpu = cpu;
- s.info.read_memory_func = target_read_memory;
- s.info.buffer_vma = code;
- s.info.buffer_length = size;
- s.info.print_address_func = generic_print_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;
+ s->info.endian = BFD_ENDIAN_BIG;
#else
- s.info.endian = BFD_ENDIAN_LITTLE;
+ 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);
+ cc->disas_set_info(cpu, &s->info);
}
+}
-#if defined(TARGET_I386)
- if (flags == 2) {
- s.info.mach = bfd_mach_x86_64;
- } else if (flags == 1) {
- s.info.mach = bfd_mach_i386_i8086;
- } else {
- s.info.mach = bfd_mach_i386_i386;
- }
- s.info.print_insn = print_insn_i386;
-#elif defined(TARGET_PPC)
- if ((flags >> 16) & 1) {
- s.info.endian = BFD_ENDIAN_LITTLE;
- }
- if (flags & 0xFFFF) {
- /* If we have a precise definition of the instruction set, use it. */
- s.info.mach = flags & 0xFFFF;
- } else {
-#ifdef TARGET_PPC64
- s.info.mach = bfd_mach_ppc64;
+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.mach = bfd_mach_ppc;
+ s->info.endian = BFD_ENDIAN_LITTLE;
#endif
- }
- s.info.disassembler_options = (char *)"any";
- s.info.print_insn = print_insn_ppc;
+#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__)
+ 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.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;
+ 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;
+#endif
+}
+
+/* Disassemble this for me please... (debugging). */
+void target_disas(FILE *out, CPUState *cpu, target_ulong code,
+ target_ulong size)
+{
+ target_ulong pc;
+ int count;
+ CPUDebug s;
+
+ initialize_debug_target(&s, cpu);
+ s.info.fprintf_func = fprintf;
+ s.info.stream = out;
+ s.info.buffer_vma = code;
+ s.info.buffer_length = size;
+
+ if (s.info.cap_arch >= 0 && cap_disas_target(&s.info, code, size)) {
+ return;
+ }
+
if (s.info.print_insn == NULL) {
s.info.print_insn = print_insn_od_target;
}
for (pc = code; size > 0; pc += count, size -= count) {
fprintf(out, "0x" TARGET_FMT_lx ": ", pc);
count = s.info.print_insn(pc, &s.info);
-#if 0
- {
- int i;
- uint8_t b;
- fprintf(out, " {");
- for(i = 0; i < count; i++) {
- target_read_memory(pc + i, &b, 1, &s.info);
- fprintf(out, " %02x", b);
- }
- fprintf(out, " }");
- }
-#endif
fprintf(out, "\n");
if (count < 0)
break;
}
}
+static int plugin_printf(FILE *stream, const char *fmt, ...)
+{
+ /* We abuse the FILE parameter to pass a GString. */
+ GString *s = (GString *)stream;
+ int initial_len = s->len;
+ va_list va;
+
+ 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 */
+}
+
+
+/*
+ * 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)
+{
+ CPUDebug s;
+ GString *ds = g_string_new(NULL);
+
+ initialize_debug_target(&s, cpu);
+ s.info.fprintf_func = plugin_printf;
+ s.info.stream = (FILE *)ds; /* abuse this slot */
+ 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)) {
+ ; /* done */
+ } else if (s.info.print_insn) {
+ s.info.print_insn(addr, &s.info);
+ } else {
+ ; /* cannot disassemble -- return empty string */
+ }
+
+ /* Return the buffer, freeing the GString container. */
+ return g_string_free(ds, false);
+}
+
/* 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;
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;
-#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;
-#elif defined(__x86_64__)
- s.info.mach = bfd_mach_x86_64;
- print_insn = print_insn_i386;
-#elif defined(_ARCH_PPC)
- s.info.disassembler_options = (char *)"any";
- print_insn = print_insn_ppc;
-#elif defined(__aarch64__) && defined(CONFIG_ARM_A64_DIS)
- print_insn = print_insn_arm_a64;
-#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;
-#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(__ia64__)
- print_insn = print_insn_ia64;
-#endif
- if (print_insn == NULL) {
- print_insn = print_insn_od_host;
+ if (s.info.cap_arch >= 0 && cap_disas_host(&s.info, code, size)) {
+ return;
+ }
+
+ 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. */
#include "monitor/monitor.h"
-static int monitor_disas_is_physical;
-
static int
-monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
+physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
CPUDebug *s = container_of(info, CPUDebug, info);
+ MemTxResult res;
- if (monitor_disas_is_physical) {
- cpu_physical_memory_read(memaddr, myaddr, length);
- } else {
- cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0);
- }
- return 0;
+ res = address_space_read(s->cpu->as, memaddr, MEMTXATTRS_UNSPECIFIED,
+ myaddr, length);
+ return res == MEMTX_OK ? 0 : EIO;
}
-/* Disassembler for the monitor.
- See target_disas for a description of flags. */
+/* Disassembler for the monitor. */
void monitor_disas(Monitor *mon, CPUState *cpu,
- target_ulong pc, int nb_insn, int is_physical, int flags)
+ 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;
- monitor_disas_is_physical = is_physical;
- s.info.read_memory_func = monitor_read_memory;
- s.info.print_address_func = generic_print_address;
-
+ 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;
-#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_monitor(&s.info, pc, nb_insn)) {
+ return;
}
-#if defined(TARGET_I386)
- if (flags == 2) {
- s.info.mach = bfd_mach_x86_64;
- } else if (flags == 1) {
- s.info.mach = bfd_mach_i386_i8086;
- } else {
- s.info.mach = bfd_mach_i386_i386;
- }
- s.info.print_insn = print_insn_i386;
-#elif defined(TARGET_PPC)
- if (flags & 0xFFFF) {
- /* If we have a precise definition of the instruction set, use it. */
- s.info.mach = flags & 0xFFFF;
- } else {
-#ifdef TARGET_PPC64
- s.info.mach = bfd_mach_ppc64;
-#else
- s.info.mach = bfd_mach_ppc;
-#endif
- }
- if ((flags >> 16) & 1) {
- s.info.endian = BFD_ENDIAN_LITTLE;
- }
- s.info.print_insn = print_insn_ppc;
-#endif
if (!s.info.print_insn) {
monitor_printf(mon, "0x" TARGET_FMT_lx
": Asm output not supported on this arch\n", pc);
projects / mirror_qemu.git / blobdiff