[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;
}

/* Disassemble this for me please... (debugging). 'flags' is only used
   for i386: non zero means 16 bit code */
void target_disas(FILE *out, target_ulong code, unsigned long 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)
    print_insn = print_insn_arm;
#elif defined(TARGET_SPARC)
    print_insn = print_insn_sparc;
#elif defined(TARGET_PPC)
    print_insn = print_insn_ppc;
#else
    fprintf(out, "Asm output not supported on this arch\n");
    return;
#endif

    for (pc = code; pc < code + size; pc += count) {
#if TARGET_LONG_BITS == 64        
	fprintf(out, "0x%016llx:  ", pc);
#else
	fprintf(out, "0x%08x:  ", pc);
#endif
	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, "Asm output not supported on this arch\n");
    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)
        disasm_info.mach = bfd_mach_i386_i386;
    else
        disasm_info.mach = bfd_mach_i386_i8086;
    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("Asm output not supported on this arch\n");
    return;
#endif

    for(i = 0; i < nb_insn; i++) {
	term_printf("0x%08lx:  ", (unsigned long)pc);
	count = print_insn(pc, &disasm_info);
	term_printf("\n");
	if (count < 0)
	    break;
        pc += count;
    }
}
#endif
Commit	Line	Data
b9adb4a6	1	/* General "disassemble this chunk" code. Used for debugging. */
5bbe9299	2	#include "config.h"
b9adb4a6	3	#include "dis-asm.h"
b9adb4a6	4	#include "elf.h"
aa0aa4fa	5	#include <errno.h>
b9adb4a6	6
c6105c0a FB	7	#include "cpu.h"
c6105c0a FB	8	#include "exec-all.h"
9307c4c1	9	#include "disas.h"
c6105c0a	10
b9adb4a6	11	/* Filled in by elfload.c. Simplistic, but will do for now. */
e80cfcfc	12	struct syminfo *syminfos = NULL;
b9adb4a6	13
aa0aa4fa FB	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	{
c6105c0a FB	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;
aa0aa4fa FB	29	}
aa0aa4fa FB	30
c6105c0a FB	31	/* Get LENGTH bytes from info's buffer, at target address memaddr.
	32	Transfer them to myaddr. */
	33	static int
c27004ec FB	34	target_read_memory (bfd_vma memaddr,
	35	bfd_byte *myaddr,
	36	int length,
	37	struct disassemble_info *info)
c6105c0a FB	38	{
	39	int i;
	40	for(i = 0; i < length; i++) {
c27004ec	41	myaddr[i] = ldub_code(memaddr + i);
c6105c0a FB	42	}
	43	return 0;
	44	}
c6105c0a	45
aa0aa4fa FB	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,
d44b29c2	61	"Address 0x%llx is out of bounds.\n", memaddr);
aa0aa4fa FB	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	{
d44b29c2	76	(*info->fprintf_func) (info->stream, "0x%llx", addr);
aa0aa4fa FB	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
95cbfc64 FB	111	/* Disassemble this for me please... (debugging). 'flags' is only used
95cbfc64 FB	112	for i386: non zero means 16 bit code */
c27004ec	113	void target_disas(FILE *out, target_ulong code, unsigned long size, int flags)
b9adb4a6	114	{
c27004ec	115	target_ulong pc;
b9adb4a6 FB	116	int count;
	117	struct disassemble_info disasm_info;
	118	int (print_insn)(bfd_vma pc, disassemble_info info);
	119
	120	INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
	121
c27004ec FB	122	disasm_info.read_memory_func = target_read_memory;
	123	disasm_info.buffer_vma = code;
	124	disasm_info.buffer_length = size;
	125
	126	#ifdef TARGET_WORDS_BIGENDIAN
	127	disasm_info.endian = BFD_ENDIAN_BIG;
	128	#else
	129	disasm_info.endian = BFD_ENDIAN_LITTLE;
	130	#endif
	131	#if defined(TARGET_I386)
	132	if (flags == 2)
	133	disasm_info.mach = bfd_mach_x86_64;
	134	else if (flags == 1)
	135	disasm_info.mach = bfd_mach_i386_i8086;
	136	else
	137	disasm_info.mach = bfd_mach_i386_i386;
	138	print_insn = print_insn_i386;
	139	#elif defined(TARGET_ARM)
	140	print_insn = print_insn_arm;
	141	#elif defined(TARGET_SPARC)
	142	print_insn = print_insn_sparc;
	143	#elif defined(TARGET_PPC)
	144	print_insn = print_insn_ppc;
	145	#else
	146	fprintf(out, "Asm output not supported on this arch\n");
	147	return;
c6105c0a FB	148	#endif
c6105c0a FB	149
c27004ec FB	150	for (pc = code; pc < code + size; pc += count) {
	151	#if TARGET_LONG_BITS == 64
	152	fprintf(out, "0x%016llx: ", pc);
	153	#else
	154	fprintf(out, "0x%08x: ", pc);
	155	#endif
	156	count = print_insn(pc, &disasm_info);
	157	#if 0
	158	{
	159	int i;
	160	uint8_t b;
	161	fprintf(out, " {");
	162	for(i = 0; i < count; i++) {
	163	target_read_memory(pc + i, &b, 1, &disasm_info);
	164	fprintf(out, " %02x", b);
	165	}
	166	fprintf(out, " }");
	167	}
	168	#endif
	169	fprintf(out, "\n");
	170	if (count < 0)
	171	break;
	172	}
	173	}
	174
	175	/* Disassemble this for me please... (debugging). */
	176	void disas(FILE out, void code, unsigned long size)
	177	{
	178	unsigned long pc;
	179	int count;
	180	struct disassemble_info disasm_info;
	181	int (print_insn)(bfd_vma pc, disassemble_info info);
	182
	183	INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
	184
b9adb4a6 FB	185	disasm_info.buffer = code;
	186	disasm_info.buffer_vma = (unsigned long)code;
	187	disasm_info.buffer_length = size;
	188
b9adb4a6	189	#ifdef WORDS_BIGENDIAN
c27004ec	190	disasm_info.endian = BFD_ENDIAN_BIG;
b9adb4a6	191	#else
c27004ec	192	disasm_info.endian = BFD_ENDIAN_LITTLE;
b9adb4a6	193	#endif
bc51c5c9	194	#if defined(__i386__)
c27004ec FB	195	disasm_info.mach = bfd_mach_i386_i386;
c27004ec FB	196	print_insn = print_insn_i386;
bc51c5c9	197	#elif defined(__x86_64__)
c27004ec FB	198	disasm_info.mach = bfd_mach_x86_64;
c27004ec FB	199	print_insn = print_insn_i386;
b9adb4a6	200	#elif defined(__powerpc__)
c27004ec	201	print_insn = print_insn_ppc;
a993ba85	202	#elif defined(__alpha__)
c27004ec	203	print_insn = print_insn_alpha;
aa0aa4fa	204	#elif defined(__sparc__)
c27004ec	205	print_insn = print_insn_sparc;
aa0aa4fa	206	#elif defined(__arm__)
c27004ec	207	print_insn = print_insn_arm;
b9adb4a6	208	#else
c27004ec FB	209	fprintf(out, "Asm output not supported on this arch\n");
c27004ec FB	210	return;
b9adb4a6	211	#endif
c27004ec FB	212	for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) {
c27004ec FB	213	fprintf(out, "0x%08lx: ", pc);
aa0aa4fa FB	214	#ifdef __arm__
	215	/* since data are included in the code, it is better to
	216	display code data too */
95cbfc64	217	if (is_host) {
aa0aa4fa FB	218	fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc));
	219	}
	220	#endif
c27004ec	221	count = print_insn(pc, &disasm_info);
b9adb4a6 FB	222	fprintf(out, "\n");
	223	if (count < 0)
	224	break;
	225	}
	226	}
	227
	228	/* Look up symbol for debugging purpose. Returns "" if unknown. */
c27004ec	229	const char *lookup_symbol(target_ulong orig_addr)
b9adb4a6 FB	230	{
	231	unsigned int i;
	232	/* Hack, because we know this is x86. */
e80cfcfc FB	233	Elf32_Sym *sym;
	234	struct syminfo *s;
	235
	236	for (s = syminfos; s; s = s->next) {
	237	sym = s->disas_symtab;
	238	for (i = 0; i < s->disas_num_syms; i++) {
	239	if (sym[i].st_shndx == SHN_UNDEF
	240	\|\| sym[i].st_shndx >= SHN_LORESERVE)
	241	continue;
b9adb4a6	242
e80cfcfc FB	243	if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
e80cfcfc FB	244	continue;
b9adb4a6	245
c27004ec FB	246	if (orig_addr >= sym[i].st_value
c27004ec FB	247	&& orig_addr < sym[i].st_value + sym[i].st_size)
e80cfcfc FB	248	return s->disas_strtab + sym[i].st_name;
e80cfcfc FB	249	}
b9adb4a6 FB	250	}
	251	return "";
	252	}
9307c4c1 FB	253
	254	#if !defined(CONFIG_USER_ONLY)
	255
3d2cfdf1 FB	256	void term_vprintf(const char *fmt, va_list ap);
	257	void term_printf(const char *fmt, ...);
	258
9307c4c1 FB	259	static int monitor_disas_is_physical;
	260
	261	static int
	262	monitor_read_memory (memaddr, myaddr, length, info)
	263	bfd_vma memaddr;
	264	bfd_byte *myaddr;
	265	int length;
	266	struct disassemble_info *info;
	267	{
	268	if (monitor_disas_is_physical) {
	269	cpu_physical_memory_rw(memaddr, myaddr, length, 0);
	270	} else {
	271	cpu_memory_rw_debug(cpu_single_env, memaddr,myaddr, length, 0);
	272	}
	273	return 0;
	274	}
	275
3d2cfdf1 FB	276	static int monitor_fprintf(FILE stream, const char fmt, ...)
	277	{
	278	va_list ap;
	279	va_start(ap, fmt);
	280	term_vprintf(fmt, ap);
	281	va_end(ap);
	282	return 0;
	283	}
	284
9307c4c1 FB	285	void monitor_disas(target_ulong pc, int nb_insn, int is_physical, int flags)
9307c4c1 FB	286	{
9307c4c1 FB	287	int count, i;
	288	struct disassemble_info disasm_info;
	289	int (print_insn)(bfd_vma pc, disassemble_info info);
	290
3d2cfdf1	291	INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);
9307c4c1 FB	292
	293	monitor_disas_is_physical = is_physical;
	294	disasm_info.read_memory_func = monitor_read_memory;
	295
	296	disasm_info.buffer_vma = pc;
	297
	298	#ifdef TARGET_WORDS_BIGENDIAN
	299	disasm_info.endian = BFD_ENDIAN_BIG;
	300	#else
	301	disasm_info.endian = BFD_ENDIAN_LITTLE;
	302	#endif
	303	#if defined(TARGET_I386)
	304	if (!flags)
	305	disasm_info.mach = bfd_mach_i386_i386;
	306	else
	307	disasm_info.mach = bfd_mach_i386_i8086;
	308	print_insn = print_insn_i386;
	309	#elif defined(TARGET_ARM)
	310	print_insn = print_insn_arm;
	311	#elif defined(TARGET_SPARC)
	312	print_insn = print_insn_sparc;
	313	#elif defined(TARGET_PPC)
	314	print_insn = print_insn_ppc;
	315	#else
7fe48483	316	term_printf("Asm output not supported on this arch\n");
9307c4c1 FB	317	return;
	318	#endif
	319
	320	for(i = 0; i < nb_insn; i++) {
3d2cfdf1	321	term_printf("0x%08lx: ", (unsigned long)pc);
9307c4c1	322	count = print_insn(pc, &disasm_info);
3d2cfdf1	323	term_printf("\n");
9307c4c1 FB	324	if (count < 0)
	325	break;
	326	pc += count;
	327	}
	328	}
	329	#endif