[mirror_qemu.git] / disas.c

/* General "disassemble this chunk" code.  Used for debugging. */
#include "config.h"
#include "dis-asm.h"
#include "elf.h"
#include <errno.h>

#include "cpu.h"
#include "exec-all.h"
#include "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 (memaddr, myaddr, length, info)
     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)
{
    int i;
    for(i = 0; i < length; i++) {
        myaddr[i] = ldub_code(memaddr + i);
    }
    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 (status, memaddr, info)
     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%llx is out of bounds.\n", memaddr);
}

/* This could be in a separate file, to save miniscule 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 (addr, info)
     bfd_vma addr;
     struct disassemble_info *info;
{
  (*info->fprintf_func) (info->stream, "0x%llx", addr);
}

/* Just return the given address.  */

int
generic_symbol_at_address (addr, info)
     bfd_vma addr;
     struct disassemble_info * info;
{
  return 1;
}

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;
}

#ifdef TARGET_ARM
static int
print_insn_thumb1(bfd_vma pc, disassemble_info *info)
{
  return print_insn_arm(pc | 1, info);
}
#endif

/* Disassemble this for me please... (debugging). 'flags' has teh following
   values:
    i386 - nonzero means 16 bit code
    arm  - nonzero means thumb code 
    other targets - unused
 */
void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
{
    target_ulong pc;
    int count;
    struct disassemble_info disasm_info;
    int (*print_insn)(bfd_vma pc, disassemble_info *info);

    INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);

    disasm_info.read_memory_func = target_read_memory;
    disasm_info.buffer_vma = code;
    disasm_info.buffer_length = size;

#ifdef TARGET_WORDS_BIGENDIAN
    disasm_info.endian = BFD_ENDIAN_BIG;
#else
    disasm_info.endian = BFD_ENDIAN_LITTLE;
#endif
#if defined(TARGET_I386)
    if (flags == 2)
        disasm_info.mach = bfd_mach_x86_64;
    else if (flags == 1) 
        disasm_info.mach = bfd_mach_i386_i8086;
    else
        disasm_info.mach = bfd_mach_i386_i386;
    print_insn = print_insn_i386;
#elif defined(TARGET_ARM)
    if (flags)
	print_insn = print_insn_thumb1;
    else
	print_insn = print_insn_arm;
#elif defined(TARGET_SPARC)
    print_insn = print_insn_sparc;
#ifdef TARGET_SPARC64
    disasm_info.mach = bfd_mach_sparc_v9b;
#endif    
#elif defined(TARGET_PPC)
    if (cpu_single_env->msr[MSR_LE])
        disasm_info.endian = BFD_ENDIAN_LITTLE;
    print_insn = print_insn_ppc;
#else
    fprintf(out, "0x" TARGET_FMT_lx
	    ": Asm output not supported on this arch\n", code);
    return;
#endif

    for (pc = code; pc < code + size; pc += count) {
	fprintf(out, "0x" TARGET_FMT_lx ":  ", pc);
	count = print_insn(pc, &disasm_info);
#if 0
        {
            int i;
            uint8_t b;
            fprintf(out, " {");
            for(i = 0; i < count; i++) {
                target_read_memory(pc + i, &b, 1, &disasm_info);
                fprintf(out, " %02x", b);
            }
            fprintf(out, " }");
        }
#endif
	fprintf(out, "\n");
	if (count < 0)
	    break;
    }
}

/* Disassemble this for me please... (debugging). */
void disas(FILE *out, void *code, unsigned long size)
{
    unsigned long pc;
    int count;
    struct disassemble_info disasm_info;
    int (*print_insn)(bfd_vma pc, disassemble_info *info);

    INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);

    disasm_info.buffer = code;
    disasm_info.buffer_vma = (unsigned long)code;
    disasm_info.buffer_length = size;

#ifdef WORDS_BIGENDIAN
    disasm_info.endian = BFD_ENDIAN_BIG;
#else
    disasm_info.endian = BFD_ENDIAN_LITTLE;
#endif
#if defined(__i386__)
    disasm_info.mach = bfd_mach_i386_i386;
    print_insn = print_insn_i386;
#elif defined(__x86_64__)
    disasm_info.mach = bfd_mach_x86_64;
    print_insn = print_insn_i386;
#elif defined(__powerpc__)
    print_insn = print_insn_ppc;
#elif defined(__alpha__)
    print_insn = print_insn_alpha;
#elif defined(__sparc__)
    print_insn = print_insn_sparc;
#elif defined(__arm__) 
    print_insn = print_insn_arm;
#else
    fprintf(out, "0x%lx: Asm output not supported on this arch\n",
	    (long) code);
    return;
#endif
    for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) {
	fprintf(out, "0x%08lx:  ", pc);
#ifdef __arm__
        /* since data are included in the code, it is better to
           display code data too */
        if (is_host) {
            fprintf(out, "%08x  ", (int)bfd_getl32((const bfd_byte *)pc));
        }
#endif
	count = print_insn(pc, &disasm_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)
{
    unsigned int i;
    /* Hack, because we know this is x86. */
    Elf32_Sym *sym;
    struct syminfo *s;
    
    for (s = syminfos; s; s = s->next) {
	sym = s->disas_symtab;
	for (i = 0; i < s->disas_num_syms; i++) {
	    if (sym[i].st_shndx == SHN_UNDEF
		|| sym[i].st_shndx >= SHN_LORESERVE)
		continue;

	    if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
		continue;

	    if (orig_addr >= sym[i].st_value
		&& orig_addr < sym[i].st_value + sym[i].st_size)
		return s->disas_strtab + sym[i].st_name;
	}
    }
    return "";
}

#if !defined(CONFIG_USER_ONLY)

void term_vprintf(const char *fmt, va_list ap);
void term_printf(const char *fmt, ...);

static int monitor_disas_is_physical;

static int
monitor_read_memory (memaddr, myaddr, length, info)
     bfd_vma memaddr;
     bfd_byte *myaddr;
     int length;
     struct disassemble_info *info;
{
    if (monitor_disas_is_physical) {
        cpu_physical_memory_rw(memaddr, myaddr, length, 0);
    } else {
        cpu_memory_rw_debug(cpu_single_env, memaddr,myaddr, length, 0);
    }
    return 0;
}

static int monitor_fprintf(FILE *stream, const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    term_vprintf(fmt, ap);
    va_end(ap);
    return 0;
}

void monitor_disas(target_ulong pc, int nb_insn, int is_physical, int flags)
{
    int count, i;
    struct disassemble_info disasm_info;
    int (*print_insn)(bfd_vma pc, disassemble_info *info);

    INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);

    monitor_disas_is_physical = is_physical;
    disasm_info.read_memory_func = monitor_read_memory;

    disasm_info.buffer_vma = pc;

#ifdef TARGET_WORDS_BIGENDIAN
    disasm_info.endian = BFD_ENDIAN_BIG;
#else
    disasm_info.endian = BFD_ENDIAN_LITTLE;
#endif
#if defined(TARGET_I386)
    if (flags == 2)
        disasm_info.mach = bfd_mach_x86_64;
    else if (flags == 1) 
        disasm_info.mach = bfd_mach_i386_i8086;
    else
        disasm_info.mach = bfd_mach_i386_i386;
    print_insn = print_insn_i386;
#elif defined(TARGET_ARM)
    print_insn = print_insn_arm;
#elif defined(TARGET_SPARC)
    print_insn = print_insn_sparc;
#elif defined(TARGET_PPC)
    print_insn = print_insn_ppc;
#else
    term_printf("0x" TARGET_FMT_lx
		": Asm output not supported on this arch\n", pc);
    return;
#endif

    for(i = 0; i < nb_insn; i++) {
	term_printf("0x" TARGET_FMT_lx ":  ", pc);
	count = print_insn(pc, &disasm_info);
	term_printf("\n");
	if (count < 0)
	    break;
        pc += count;
    }
}
#endif
Commit	Line	Data
	1	/* General "disassemble this chunk" code. Used for debugging. */
	2	#include "config.h"
	3	#include "dis-asm.h"
	4	#include "elf.h"
	5	#include <errno.h>
	6
	7	#include "cpu.h"
	8	#include "exec-all.h"
	9	#include "disas.h"
	10
	11	/* Filled in by elfload.c. Simplistic, but will do for now. */
	12	struct syminfo *syminfos = NULL;
	13
	14	/* Get LENGTH bytes from info's buffer, at target address memaddr.
	15	Transfer them to myaddr. */
	16	int
	17	buffer_read_memory (memaddr, myaddr, length, info)
	18	bfd_vma memaddr;
	19	bfd_byte *myaddr;
	20	int length;
	21	struct disassemble_info *info;
	22	{
	23	if (memaddr < info->buffer_vma
	24	\|\| memaddr + length > info->buffer_vma + info->buffer_length)
	25	/* Out of bounds. Use EIO because GDB uses it. */
	26	return EIO;
	27	memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
	28	return 0;
	29	}
	30
	31	/* Get LENGTH bytes from info's buffer, at target address memaddr.
	32	Transfer them to myaddr. */
	33	static int
	34	target_read_memory (bfd_vma memaddr,
	35	bfd_byte *myaddr,
	36	int length,
	37	struct disassemble_info *info)
	38	{
	39	int i;
	40	for(i = 0; i < length; i++) {
	41	myaddr[i] = ldub_code(memaddr + i);
	42	}
	43	return 0;
	44	}
	45
	46	/* Print an error message. We can assume that this is in response to
	47	an error return from buffer_read_memory. */
	48	void
	49	perror_memory (status, memaddr, info)
	50	int status;
	51	bfd_vma memaddr;
	52	struct disassemble_info *info;
	53	{
	54	if (status != EIO)
	55	/* Can't happen. */
	56	(*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
	57	else
	58	/* Actually, address between memaddr and memaddr + len was
	59	out of bounds. */
	60	(*info->fprintf_func) (info->stream,
	61	"Address 0x%llx is out of bounds.\n", memaddr);
	62	}
	63
	64	/* This could be in a separate file, to save miniscule amounts of space
	65	in statically linked executables. */
	66
	67	/* Just print the address is hex. This is included for completeness even
	68	though both GDB and objdump provide their own (to print symbolic
	69	addresses). */
	70
	71	void
	72	generic_print_address (addr, info)
	73	bfd_vma addr;
	74	struct disassemble_info *info;
	75	{
	76	(*info->fprintf_func) (info->stream, "0x%llx", addr);
	77	}
	78
	79	/* Just return the given address. */
	80
	81	int
	82	generic_symbol_at_address (addr, info)
	83	bfd_vma addr;
	84	struct disassemble_info * info;
	85	{
	86	return 1;
	87	}
	88
	89	bfd_vma bfd_getl32 (const bfd_byte *addr)
	90	{
	91	unsigned long v;
	92
	93	v = (unsigned long) addr[0];
	94	v \|= (unsigned long) addr[1] << 8;
	95	v \|= (unsigned long) addr[2] << 16;
	96	v \|= (unsigned long) addr[3] << 24;
	97	return (bfd_vma) v;
	98	}
	99
	100	bfd_vma bfd_getb32 (const bfd_byte *addr)
	101	{
	102	unsigned long v;
	103
	104	v = (unsigned long) addr[0] << 24;
	105	v \|= (unsigned long) addr[1] << 16;
	106	v \|= (unsigned long) addr[2] << 8;
	107	v \|= (unsigned long) addr[3];
	108	return (bfd_vma) v;
	109	}
	110
	111	#ifdef TARGET_ARM
	112	static int
	113	print_insn_thumb1(bfd_vma pc, disassemble_info *info)
	114	{
	115	return print_insn_arm(pc \| 1, info);
	116	}
	117	#endif
	118
	119	/* Disassemble this for me please... (debugging). 'flags' has teh following
	120	values:
	121	i386 - nonzero means 16 bit code
	122	arm - nonzero means thumb code
	123	other targets - unused
	124	*/
	125	void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
	126	{
	127	target_ulong pc;
	128	int count;
	129	struct disassemble_info disasm_info;
	130	int (print_insn)(bfd_vma pc, disassemble_info info);
	131
	132	INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
	133
	134	disasm_info.read_memory_func = target_read_memory;
	135	disasm_info.buffer_vma = code;
	136	disasm_info.buffer_length = size;
	137
	138	#ifdef TARGET_WORDS_BIGENDIAN
	139	disasm_info.endian = BFD_ENDIAN_BIG;
	140	#else
	141	disasm_info.endian = BFD_ENDIAN_LITTLE;
	142	#endif
	143	#if defined(TARGET_I386)
	144	if (flags == 2)
	145	disasm_info.mach = bfd_mach_x86_64;
	146	else if (flags == 1)
	147	disasm_info.mach = bfd_mach_i386_i8086;
	148	else
	149	disasm_info.mach = bfd_mach_i386_i386;
	150	print_insn = print_insn_i386;
	151	#elif defined(TARGET_ARM)
	152	if (flags)
	153	print_insn = print_insn_thumb1;
	154	else
	155	print_insn = print_insn_arm;
	156	#elif defined(TARGET_SPARC)
	157	print_insn = print_insn_sparc;
	158	#ifdef TARGET_SPARC64
	159	disasm_info.mach = bfd_mach_sparc_v9b;
	160	#endif
	161	#elif defined(TARGET_PPC)
	162	if (cpu_single_env->msr[MSR_LE])
	163	disasm_info.endian = BFD_ENDIAN_LITTLE;
	164	print_insn = print_insn_ppc;
	165	#else
	166	fprintf(out, "0x" TARGET_FMT_lx
	167	": Asm output not supported on this arch\n", code);
	168	return;
	169	#endif
	170
	171	for (pc = code; pc < code + size; pc += count) {
	172	fprintf(out, "0x" TARGET_FMT_lx ": ", pc);
	173	count = print_insn(pc, &disasm_info);
	174	#if 0
	175	{
	176	int i;
	177	uint8_t b;
	178	fprintf(out, " {");
	179	for(i = 0; i < count; i++) {
	180	target_read_memory(pc + i, &b, 1, &disasm_info);
	181	fprintf(out, " %02x", b);
	182	}
	183	fprintf(out, " }");
	184	}
	185	#endif
	186	fprintf(out, "\n");
	187	if (count < 0)
	188	break;
	189	}
	190	}
	191
	192	/* Disassemble this for me please... (debugging). */
	193	void disas(FILE out, void code, unsigned long size)
	194	{
	195	unsigned long pc;
	196	int count;
	197	struct disassemble_info disasm_info;
	198	int (print_insn)(bfd_vma pc, disassemble_info info);
	199
	200	INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
	201
	202	disasm_info.buffer = code;
	203	disasm_info.buffer_vma = (unsigned long)code;
	204	disasm_info.buffer_length = size;
	205
	206	#ifdef WORDS_BIGENDIAN
	207	disasm_info.endian = BFD_ENDIAN_BIG;
	208	#else
	209	disasm_info.endian = BFD_ENDIAN_LITTLE;
	210	#endif
	211	#if defined(__i386__)
	212	disasm_info.mach = bfd_mach_i386_i386;
	213	print_insn = print_insn_i386;
	214	#elif defined(__x86_64__)
	215	disasm_info.mach = bfd_mach_x86_64;
	216	print_insn = print_insn_i386;
	217	#elif defined(__powerpc__)
	218	print_insn = print_insn_ppc;
	219	#elif defined(__alpha__)
	220	print_insn = print_insn_alpha;
	221	#elif defined(__sparc__)
	222	print_insn = print_insn_sparc;
	223	#elif defined(__arm__)
	224	print_insn = print_insn_arm;
	225	#else
	226	fprintf(out, "0x%lx: Asm output not supported on this arch\n",
	227	(long) code);
	228	return;
	229	#endif
	230	for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) {
	231	fprintf(out, "0x%08lx: ", pc);
	232	#ifdef __arm__
	233	/* since data are included in the code, it is better to
	234	display code data too */
	235	if (is_host) {
	236	fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc));
	237	}
	238	#endif
	239	count = print_insn(pc, &disasm_info);
	240	fprintf(out, "\n");
	241	if (count < 0)
	242	break;
	243	}
	244	}
	245
	246	/* Look up symbol for debugging purpose. Returns "" if unknown. */
	247	const char *lookup_symbol(target_ulong orig_addr)
	248	{
	249	unsigned int i;
	250	/* Hack, because we know this is x86. */
	251	Elf32_Sym *sym;
	252	struct syminfo *s;
	253
	254	for (s = syminfos; s; s = s->next) {
	255	sym = s->disas_symtab;
	256	for (i = 0; i < s->disas_num_syms; i++) {
	257	if (sym[i].st_shndx == SHN_UNDEF
	258	\|\| sym[i].st_shndx >= SHN_LORESERVE)
	259	continue;
	260
	261	if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
	262	continue;
	263
	264	if (orig_addr >= sym[i].st_value
	265	&& orig_addr < sym[i].st_value + sym[i].st_size)
	266	return s->disas_strtab + sym[i].st_name;
	267	}
	268	}
	269	return "";
	270	}
	271
	272	#if !defined(CONFIG_USER_ONLY)
	273
	274	void term_vprintf(const char *fmt, va_list ap);
	275	void term_printf(const char *fmt, ...);
	276
	277	static int monitor_disas_is_physical;
	278
	279	static int
	280	monitor_read_memory (memaddr, myaddr, length, info)
	281	bfd_vma memaddr;
	282	bfd_byte *myaddr;
	283	int length;
	284	struct disassemble_info *info;
	285	{
	286	if (monitor_disas_is_physical) {
	287	cpu_physical_memory_rw(memaddr, myaddr, length, 0);
	288	} else {
	289	cpu_memory_rw_debug(cpu_single_env, memaddr,myaddr, length, 0);
	290	}
	291	return 0;
	292	}
	293
	294	static int monitor_fprintf(FILE stream, const char fmt, ...)
	295	{
	296	va_list ap;
	297	va_start(ap, fmt);
	298	term_vprintf(fmt, ap);
	299	va_end(ap);
	300	return 0;
	301	}
	302
	303	void monitor_disas(target_ulong pc, int nb_insn, int is_physical, int flags)
	304	{
	305	int count, i;
	306	struct disassemble_info disasm_info;
	307	int (print_insn)(bfd_vma pc, disassemble_info info);
	308
	309	INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);
	310
	311	monitor_disas_is_physical = is_physical;
	312	disasm_info.read_memory_func = monitor_read_memory;
	313
	314	disasm_info.buffer_vma = pc;
	315
	316	#ifdef TARGET_WORDS_BIGENDIAN
	317	disasm_info.endian = BFD_ENDIAN_BIG;
	318	#else
	319	disasm_info.endian = BFD_ENDIAN_LITTLE;
	320	#endif
	321	#if defined(TARGET_I386)
	322	if (flags == 2)
	323	disasm_info.mach = bfd_mach_x86_64;
	324	else if (flags == 1)
	325	disasm_info.mach = bfd_mach_i386_i8086;
	326	else
	327	disasm_info.mach = bfd_mach_i386_i386;
	328	print_insn = print_insn_i386;
	329	#elif defined(TARGET_ARM)
	330	print_insn = print_insn_arm;
	331	#elif defined(TARGET_SPARC)
	332	print_insn = print_insn_sparc;
	333	#elif defined(TARGET_PPC)
	334	print_insn = print_insn_ppc;
	335	#else
	336	term_printf("0x" TARGET_FMT_lx
	337	": Asm output not supported on this arch\n", pc);
	338	return;
	339	#endif
	340
	341	for(i = 0; i < nb_insn; i++) {
	342	term_printf("0x" TARGET_FMT_lx ": ", pc);
	343	count = print_insn(pc, &disasm_info);
	344	term_printf("\n");
	345	if (count < 0)
	346	break;
	347	pc += count;
	348	}
	349	}
	350	#endif