+++ /dev/null
-/* General "disassemble this chunk" code. Used for debugging. */
-#include "qemu/osdep.h"
-#include "disas/dis-asm.h"
-#include "elf.h"
-#include "qemu/qemu-print.h"
-
-#include "disas/disas.h"
-#include "disas/capstone.h"
-
-typedef struct CPUDebug {
- struct disassemble_info info;
- CPUState *cpu;
-} CPUDebug;
-
-/* Filled in by elfload.c. Simplistic, but will do for now. */
-struct syminfo *syminfos = NULL;
-
-/*
- * 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) {
- /* 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)
-{
- CPUDebug *s = container_of(info, CPUDebug, info);
- 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 {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 {
- /* Address between memaddr and memaddr + len was out of bounds. */
- info->fprintf_func(info->stream,
- "Address 0x%" PRIx64 " is out of bounds.\n",
- memaddr);
- }
-}
-
-/* Print address in hex. */
-static void print_address(bfd_vma addr, struct disassemble_info *info)
-{
- info->fprintf_func(info->stream, "0x%" PRIx64, addr);
-}
-
-/* Print address in hex, truncated to the width of a host virtual address. */
-static void host_print_address(bfd_vma addr, struct disassemble_info *info)
-{
- print_address((uintptr_t)addr, info);
-}
-
-/* Stub prevents some fruitless earching in optabs disassemblers. */
-static int symbol_at_address(bfd_vma addr, struct disassemble_info *info)
-{
- return 1;
-}
-
-static int print_insn_objdump(bfd_vma pc, disassemble_info *info,
- const char *prefix)
-{
- int i, n = info->buffer_length;
- 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);
- }
- info->fprintf_func(info->stream, "%02x", buf[i]);
- }
-
- g_free(buf);
- return n;
-}
-
-static int print_insn_od_host(bfd_vma pc, disassemble_info *info)
-{
- return print_insn_objdump(pc, info, "OBJD-H");
-}
-
-static int print_insn_od_target(bfd_vma pc, disassemble_info *info)
-{
- return print_insn_objdump(pc, info, "OBJD-T");
-}
-
-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;
-#if TARGET_BIG_ENDIAN
- 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;
-#if HOST_BIG_ENDIAN
- 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__)
- 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.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);
- fprintf(out, "\n");
- if (count < 0)
- break;
- if (size < count) {
- fprintf(out,
- "Disassembler disagrees with translator over instruction "
- "decoding\n"
- "Please report this to qemu-devel@nongnu.org\n");
- 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, const void *code, unsigned long size)
-{
- uintptr_t pc;
- int count;
- CPUDebug s;
-
- 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;
-
- 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 = s.info.print_insn(pc, &s.info);
- fprintf(out, "\n");
- if (count < 0) {
- break;
- }
- }
-
-}
-
-/* Look up symbol for debugging purpose. Returns "" if unknown. */
-const char *lookup_symbol(target_ulong orig_addr)
-{
- const char *symbol = "";
- struct syminfo *s;
-
- for (s = syminfos; s; s = s->next) {
- symbol = s->lookup_symbol(s, orig_addr);
- if (symbol[0] != '\0') {
- break;
- }
- }
-
- return symbol;
-}
-
-#if !defined(CONFIG_USER_ONLY)
-
-#include "monitor/monitor.h"
-
-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,
- target_ulong pc, int nb_insn, int is_physical)
-{
- int count, i;
- CPUDebug s;
-
- 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;
- }
-
- if (!s.info.print_insn) {
- monitor_printf(mon, "0x" TARGET_FMT_lx
- ": Asm output not supported on this arch\n", pc);
- return;
- }
-
- for(i = 0; i < nb_insn; i++) {
- monitor_printf(mon, "0x" TARGET_FMT_lx ": ", pc);
- count = s.info.print_insn(pc, &s.info);
- monitor_printf(mon, "\n");
- if (count < 0)
- break;
- pc += count;
- }
-}
-#endif
projects / mirror_qemu.git / blobdiff