+++ /dev/null
-/* General "disassemble this chunk" code. Used for debugging. */
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "disas/bfd.h"
-#include "elf.h"
-
-#include "cpu.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 target address memaddr.
- Transfer them to myaddr. */
-int
-buffer_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);
-
- cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0);
- return 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)
-{
- 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);
-}
-
-/* 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)
-{
- (*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)
-{
- 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;
-}
-
-bfd_vma bfd_getl16 (const bfd_byte *addr)
-{
- 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;
-}
-
-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");
-}
-
-#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
-#endif /* CONFIG_CAPSTONE */
-
-/* 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;
- 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;
- }
-
- 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;
- }
- }
-}
-
-/* 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;
-
- 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(__riscv__)
- print_insn = print_insn_riscv;
-#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;
- }
- 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;
- }
-}
-
-/* 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);
-
- address_space_read(s->cpu->as, memaddr, MEMTXATTRS_UNSPECIFIED,
- myaddr, length);
- return 0;
-}
-
-/* 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);
- }
-
- 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
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