[pcsx_rearmed.git] / deps / lightning / lib / jit_disasm.c

/*
 * Copyright (C) 2012-2019  Free Software Foundation, Inc.
 *
 * This file is part of GNU lightning.
 *
 * GNU lightning is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * GNU lightning is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 * License for more details.
 *
 * Authors:
 *	Paulo Cesar Pereira de Andrade
 */

#include <lightning.h>
#include <lightning/jit_private.h>
#if DISASSEMBLER
#  include <dis-asm.h>
#endif

/*
 * Prototypes
 */
#if DISASSEMBLER
static int
disasm_compare_symbols(const void *ap, const void *bp);

static void
disasm_print_address(bfd_vma addr, struct disassemble_info *info);

#define disassemble(u, v)	_disassemble(_jit, u, v)
static void
_disassemble(jit_state_t *_jit, jit_pointer_t code, jit_int32_t length);
#endif

/*
 * Initialization
 */
#if DISASSEMBLER
static bfd			 *disasm_bfd;
static disassemble_info		  disasm_info;
static disassembler_ftype	  disasm_print;
static asymbol			**disasm_symbols;
static asymbol			 *disasm_synthetic;
static long			  disasm_num_symbols;
static long			  disasm_num_synthetic;
static jit_state_t		 *disasm_jit;
static FILE			 *disasm_stream;
#endif

/*
 * Implementation
 */
void
jit_init_debug(const char *progname)
{
    jit_init_print();
#if DISASSEMBLER
    bfd_init();

    if (progname)
	disasm_bfd = bfd_openr(progname, NULL);
    if (disasm_bfd == NULL) {
#if defined(__linux__)
	disasm_bfd = bfd_openr("/proc/self/exe", NULL);
	if (disasm_bfd == NULL)
#endif
	    return;
    }
    bfd_check_format(disasm_bfd, bfd_object);
    bfd_check_format(disasm_bfd, bfd_archive);
    if (!disasm_stream)
	disasm_stream = stdout;

    INIT_DISASSEMBLE_INFO(disasm_info, disasm_stream, fprintf);
    disasm_info.arch = bfd_get_arch(disasm_bfd);
    disasm_info.mach = bfd_get_mach(disasm_bfd);

#  if HAVE_DISASSEMBLE_INIT_FOR_TARGET
    disassemble_init_for_target(&disasm_info);
#  endif

#  if defined(__powerpc64__)
    disasm_info.disassembler_options = "64";
#  endif
#  if defined(__sparc__) || defined(__s390__) || defined(__s390x__)
    disasm_info.endian = disasm_info.display_endian = BFD_ENDIAN_BIG;
#  endif
#  if defined(__s390__) || defined(__s390x__)
    disasm_info.disassembler_options = "zarch";
#  endif
    disasm_info.print_address_func = disasm_print_address;

# if BINUTILS_2_29
    disasm_print = disassembler(disasm_info.arch, __BYTE_ORDER == __BIG_ENDIAN,
				disasm_info.mach, disasm_bfd);
#  else
    disasm_print = disassembler(disasm_bfd);
#  endif
    assert(disasm_print);

    if (bfd_get_file_flags(disasm_bfd) & HAS_SYMS) {
	asymbol		**in;
	asymbol		**out;
	asymbol		 *symbol;
	long		  offset;
	long		  sym_count;
	long		  dyn_count;
	long		  sym_storage;
	long		  dyn_storage;

	if ((sym_storage = bfd_get_symtab_upper_bound(disasm_bfd)) >= 0) {

	    if (bfd_get_file_flags(disasm_bfd) & DYNAMIC) {
		dyn_storage = bfd_get_dynamic_symtab_upper_bound(disasm_bfd);
#  if defined(__alpha__)
		/* XXX */
		if (dyn_storage < 0)
		    dyn_storage = 0;
#  else
		assert(dyn_storage >= 0);
#  endif
	    }
	    else
		dyn_storage = 0;

	    jit_alloc((jit_pointer_t *)&disasm_symbols,
		      (sym_storage + dyn_storage) * sizeof(asymbol *));
	    sym_count = bfd_canonicalize_symtab(disasm_bfd, disasm_symbols);
	    assert(sym_count >= 0);
	    if (dyn_storage) {
		dyn_count = bfd_canonicalize_dynamic_symtab(disasm_bfd,
							    disasm_symbols +
							    sym_count);
		assert(dyn_count >= 0);
	    }
	    else
		dyn_count = 0;
	    disasm_num_symbols = sym_count + dyn_count;

	    disasm_num_synthetic = bfd_get_synthetic_symtab(disasm_bfd,
							    sym_count,
							    disasm_symbols,
							    dyn_count,
							    disasm_symbols +
							    sym_count,
							    &disasm_synthetic);
	    if (disasm_num_synthetic > 0) {
		jit_realloc((jit_pointer_t *)&disasm_symbols,
			    (sym_storage + dyn_storage) * sizeof(asymbol *),
			    (sym_storage + dyn_storage + disasm_num_synthetic) *
			    sizeof(asymbol *));
		for (offset = 0; offset < disasm_num_synthetic; offset++)
		    disasm_symbols[disasm_num_symbols++] =
			disasm_synthetic + offset;
	    }

	    /* remove symbols not useful for disassemble */
	    in = out = disasm_symbols;
	    for (offset = 0; offset < disasm_num_symbols; offset++) {
		symbol = *in++;
		if (symbol->name &&
		    symbol->name[0] != '\0' &&
		    !(symbol->flags & (BSF_DEBUGGING | BSF_SECTION_SYM)) &&
		    !bfd_is_und_section(symbol->section) &&
		    !bfd_is_com_section(symbol->section))
		    *out++ = symbol;
	    }
	    disasm_num_symbols = out - disasm_symbols;
	    qsort(disasm_symbols, disasm_num_symbols,
		  sizeof(asymbol *), disasm_compare_symbols);
	}
    }
#endif
}

void
jit_finish_debug(void)
{
#if DISASSEMBLER
    if (disasm_synthetic)
	jit_free((jit_pointer_t *)&disasm_synthetic);
    if (disasm_symbols)
	jit_free((jit_pointer_t *)&disasm_symbols);
    if (disasm_bfd)
	bfd_close (disasm_bfd);
#endif
}

void
_jit_disassemble(jit_state_t *_jit)
{
#if DISASSEMBLER
    if (disasm_bfd) {
#  if defined(__arm__)
	/* FIXME add mapping for prolog switching to arm and possible jump
	 * before first prolog also in arm mode */
	disasm_info.disassembler_options = jit_cpu.thumb ? "force-thumb" : "";
#  endif

	disassemble(_jit->code.ptr, _jit->pc.uc - _jit->code.ptr);
    }
#endif
}

#if DISASSEMBLER
/* Based on objdump source */
static int
disasm_compare_symbols(const void *ap, const void *bp)
{
    const asymbol	*a = *(const asymbol **)ap;
    const asymbol	*b = *(const asymbol **)bp;

    if (bfd_asymbol_value(a) > bfd_asymbol_value(b))
	return (1);
    if (bfd_asymbol_value(a) < bfd_asymbol_value(b))
	return (-1);
    return (0);
}

#if __WORDSIZE == 32
#  define address_buffer_length		16
#  define address_buffer_format		"%llx"
#else
#  define address_buffer_length		32
#  define address_buffer_format		"%lx"
#endif
static void
disasm_print_address(bfd_vma addr, struct disassemble_info *info)
{
    char		*name;
    char		*file;
    int			 line;
    char		 buffer[address_buffer_length];

    sprintf(buffer, address_buffer_format, (long long)addr);
    (*info->fprintf_func)(info->stream, "0x%s", buffer);

#  define _jit				disasm_jit
#  undef jit_pointer_p
#  define jit_pointer_p(u)					\
	((u) >= _jit->code.ptr && (u) < _jit->pc.uc)
    if (jit_pointer_p((jit_uint8_t *)(jit_word_t)addr)) {
	if (jit_get_note((jit_uint8_t *)(jit_word_t)addr, &name, &file, &line))
	    (*info->fprintf_func)(info->stream, " %s:%s:%d",
				  name ? name : "",
				  file ? file : "",
				  line);
    }
#  undef jit_pointer_p
#  undef _jit
    else if (disasm_num_symbols) {
	long		 low;
	long		 high;
	long		 offset;
	asymbol		*symbol;

	low = 0;
	high = disasm_num_symbols;
	do {
	    offset = (low + high) >> 1;
	    symbol = disasm_symbols[offset];
	    if (bfd_asymbol_value(symbol) > addr)
		high = offset - 1;
	    else if (bfd_asymbol_value(symbol) < addr)
		low = offset + 1;
	    else
		break;
	} while (low < high);

	if (offset >= 0 && offset < disasm_num_symbols) {
	    if (bfd_asymbol_value(symbol) < addr) {
		while (++offset < disasm_num_symbols) {
		    symbol = disasm_symbols[offset];
		    if (bfd_asymbol_value(symbol) >= addr)
			break;
		}
	    }
	    else if (bfd_asymbol_value(symbol) > addr) {
		while (offset--) {
		    if (bfd_asymbol_value(disasm_symbols[offset]) < addr)
			break;
		    symbol = disasm_symbols[offset];
		}
	    }
	    if (bfd_asymbol_value(symbol) == addr)
		(*info->fprintf_func)(info->stream, " # %s", symbol->name);
	}
    }
}

static void
_disassemble(jit_state_t *_jit, jit_pointer_t code, jit_int32_t length)
{
    int			 bytes;
    char		*name, *old_name;
    char		*file, *old_file;
    int			 line,  old_line;
#if __arm__
    jit_int32_t		 offset;
    jit_bool_t		 data_info;
    jit_int32_t		 data_offset;
#endif
    bfd_vma		 pc = (jit_uword_t)code;
    bfd_vma		 end = (jit_uword_t)code + length;
    char		 buffer[address_buffer_length];
#if DEVEL_DISASSEMBLER
    jit_node_t		*node;
    jit_uword_t		 prevw;
#endif

#if __arm__
    data_info = _jitc && _jitc->data_info.ptr;
    data_offset = 0;
#endif
    disasm_info.buffer = code;
    disasm_info.buffer_vma = (jit_uword_t)code;
    disasm_info.buffer_length = length;
    old_file = old_name = NULL;
    old_line = 0;
    disasm_jit = _jit;
#if DEVEL_DISASSEMBLER
    node = _jitc->head;
    prevw = pc;
#endif
    while (pc < end) {
#if DEVEL_DISASSEMBLER
	while (node && (jit_uword_t)(prevw + node->offset) < (jit_uword_t)pc) {
	    prevw += node->offset;
	    node = node->next;
	}
	while (node && (jit_uword_t)(prevw + node->offset) == (jit_uword_t)pc) {
	    jit_print_node(node);
	    fputc('\n', stdout); 
	    prevw += node->offset;
	    node = node->next;
	}
#endif
#if __arm__
    again:
	if (data_info) {
	    while (_jitc->data_info.ptr[data_offset].code < pc) {
		if (++data_offset >= _jitc->data_info.length) {
		    data_info = 0;
		    goto again;
		}
	    }
	    if (pc == _jitc->data_info.ptr[data_offset].code) {
		offset = _jitc->data_info.ptr[data_offset].length;
		for (; offset >= 4; offset -= 4, pc += 4) {
		    bytes = sprintf(buffer, address_buffer_format, pc);
		    (*disasm_info.fprintf_func)(disasm_stream,
						"%*c0x%s\t.data\t0x%08x\n",
						16 - bytes, ' ', buffer,
						*(jit_uint32_t *)
						(jit_uint32_t)pc);
		}
		/* reset disassemble information instead of attempting
		 * to hack the arm specific backend data structures to
		 * tell it to forward the required number of bytes. */
		disasm_info.buffer = (jit_pointer_t)(jit_uint32_t)pc;
		disasm_info.buffer_vma = (jit_uword_t)pc;
		if ((disasm_info.buffer_length = end - pc) <= 0)
		    break;
	    }
	}
#endif
	if (jit_get_note((jit_uint8_t *)(jit_word_t)pc, &name, &file, &line) &&
	    (name != old_name || file != old_file || line != old_line)) {
	    (*disasm_info.fprintf_func)(disasm_stream, "# %s:%s:%d\n",
					name ? name : "",
					file ? file : "",
					line);
	    old_name = name;
	    old_file = file;
	    old_line = line;
	}

	bytes = sprintf(buffer, address_buffer_format, (long long)pc);
	(*disasm_info.fprintf_func)(disasm_stream, "%*c0x%s\t",
				    16 - bytes, ' ', buffer);
	pc += (*disasm_print)(pc, &disasm_info);
	putc('\n', disasm_stream);
    }
}
#endif
Commit	Line	Data
4a71579b PC	1	/*
	2	* Copyright (C) 2012-2019 Free Software Foundation, Inc.
	3	*
	4	* This file is part of GNU lightning.
	5	*
	6	* GNU lightning is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU Lesser General Public License as published
	8	* by the Free Software Foundation; either version 3, or (at your option)
	9	* any later version.
	10	*
	11	* GNU lightning is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	13	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
	14	* License for more details.
	15	*
	16	* Authors:
	17	* Paulo Cesar Pereira de Andrade
	18	*/
	19
	20	#include <lightning.h>
	21	#include <lightning/jit_private.h>
	22	#if DISASSEMBLER
	23	# include <dis-asm.h>
	24	#endif
	25
	26	/*
	27	* Prototypes
	28	*/
	29	#if DISASSEMBLER
	30	static int
	31	disasm_compare_symbols(const void ap, const void bp);
	32
	33	static void
	34	disasm_print_address(bfd_vma addr, struct disassemble_info *info);
	35
	36	#define disassemble(u, v) _disassemble(_jit, u, v)
	37	static void
	38	_disassemble(jit_state_t *_jit, jit_pointer_t code, jit_int32_t length);
	39	#endif
	40
	41	/*
	42	* Initialization
	43	*/
	44	#if DISASSEMBLER
	45	static bfd *disasm_bfd;
	46	static disassemble_info disasm_info;
	47	static disassembler_ftype disasm_print;
	48	static asymbol **disasm_symbols;
	49	static asymbol *disasm_synthetic;
	50	static long disasm_num_symbols;
	51	static long disasm_num_synthetic;
	52	static jit_state_t *disasm_jit;
519a9ea1	53	static FILE *disasm_stream;
4a71579b PC	54	#endif
	55
	56	/*
	57	* Implementation
	58	*/
	59	void
	60	jit_init_debug(const char *progname)
	61	{
40a44dcb	62	jit_init_print();
4a71579b PC	63	#if DISASSEMBLER
	64	bfd_init();
	65
	66	if (progname)
	67	disasm_bfd = bfd_openr(progname, NULL);
	68	if (disasm_bfd == NULL) {
	69	#if defined(__linux__)
	70	disasm_bfd = bfd_openr("/proc/self/exe", NULL);
	71	if (disasm_bfd == NULL)
	72	#endif
	73	return;
	74	}
	75	bfd_check_format(disasm_bfd, bfd_object);
	76	bfd_check_format(disasm_bfd, bfd_archive);
519a9ea1	77	if (!disasm_stream)
40a44dcb PC	78	disasm_stream = stdout;
40a44dcb PC	79
4a71579b	80	INIT_DISASSEMBLE_INFO(disasm_info, disasm_stream, fprintf);
40a44dcb PC	81	disasm_info.arch = bfd_get_arch(disasm_bfd);
	82	disasm_info.mach = bfd_get_mach(disasm_bfd);
	83
	84	# if HAVE_DISASSEMBLE_INIT_FOR_TARGET
4a71579b	85	disassemble_init_for_target(&disasm_info);
40a44dcb PC	86	# endif
	87
	88	# if defined(__powerpc64__)
4a71579b	89	disasm_info.disassembler_options = "64";
4a71579b	90	# endif
40a44dcb	91	# if defined(__sparc__) \|\| defined(__s390__) \|\| defined(__s390x__)
4a71579b PC	92	disasm_info.endian = disasm_info.display_endian = BFD_ENDIAN_BIG;
	93	# endif
	94	# if defined(__s390__) \|\| defined(__s390x__)
4a71579b	95	disasm_info.disassembler_options = "zarch";
4a71579b PC	96	# endif
	97	disasm_info.print_address_func = disasm_print_address;
	98
	99	# if BINUTILS_2_29
	100	disasm_print = disassembler(disasm_info.arch, __BYTE_ORDER == __BIG_ENDIAN,
	101	disasm_info.mach, disasm_bfd);
	102	# else
	103	disasm_print = disassembler(disasm_bfd);
	104	# endif
	105	assert(disasm_print);
	106
	107	if (bfd_get_file_flags(disasm_bfd) & HAS_SYMS) {
	108	asymbol **in;
	109	asymbol **out;
	110	asymbol *symbol;
	111	long offset;
	112	long sym_count;
	113	long dyn_count;
	114	long sym_storage;
	115	long dyn_storage;
	116
	117	if ((sym_storage = bfd_get_symtab_upper_bound(disasm_bfd)) >= 0) {
	118
	119	if (bfd_get_file_flags(disasm_bfd) & DYNAMIC) {
	120	dyn_storage = bfd_get_dynamic_symtab_upper_bound(disasm_bfd);
	121	# if defined(__alpha__)
	122	/* XXX */
	123	if (dyn_storage < 0)
	124	dyn_storage = 0;
	125	# else
	126	assert(dyn_storage >= 0);
	127	# endif
	128	}
	129	else
	130	dyn_storage = 0;
	131
	132	jit_alloc((jit_pointer_t *)&disasm_symbols,
	133	(sym_storage + dyn_storage) * sizeof(asymbol *));
	134	sym_count = bfd_canonicalize_symtab(disasm_bfd, disasm_symbols);
	135	assert(sym_count >= 0);
	136	if (dyn_storage) {
	137	dyn_count = bfd_canonicalize_dynamic_symtab(disasm_bfd,
	138	disasm_symbols +
	139	sym_count);
	140	assert(dyn_count >= 0);
	141	}
	142	else
	143	dyn_count = 0;
	144	disasm_num_symbols = sym_count + dyn_count;
	145
	146	disasm_num_synthetic = bfd_get_synthetic_symtab(disasm_bfd,
	147	sym_count,
	148	disasm_symbols,
	149	dyn_count,
	150	disasm_symbols +
	151	sym_count,
	152	&disasm_synthetic);
	153	if (disasm_num_synthetic > 0) {
	154	jit_realloc((jit_pointer_t *)&disasm_symbols,
	155	(sym_storage + dyn_storage) * sizeof(asymbol *),
	156	(sym_storage + dyn_storage + disasm_num_synthetic) *
	157	sizeof(asymbol *));
	158	for (offset = 0; offset < disasm_num_synthetic; offset++)
	159	disasm_symbols[disasm_num_symbols++] =
160	disasm_synthetic + offset;
161	}
162
163	/* remove symbols not useful for disassemble */
164	in = out = disasm_symbols;
165	for (offset = 0; offset < disasm_num_symbols; offset++) {
166	symbol = *in++;
167	if (symbol->name &&
168	symbol->name[0] != '\0' &&
169	!(symbol->flags & (BSF_DEBUGGING \| BSF_SECTION_SYM)) &&
170	!bfd_is_und_section(symbol->section) &&
171	!bfd_is_com_section(symbol->section))
172	*out++ = symbol;
173	}
174	disasm_num_symbols = out - disasm_symbols;
175	qsort(disasm_symbols, disasm_num_symbols,
176	sizeof(asymbol *), disasm_compare_symbols);
177	}
178	}
179	#endif
180	}
181
182	void
183	jit_finish_debug(void)
184	{
185	#if DISASSEMBLER
186	if (disasm_synthetic)
187	jit_free((jit_pointer_t *)&disasm_synthetic);
188	if (disasm_symbols)
189	jit_free((jit_pointer_t *)&disasm_symbols);
190	if (disasm_bfd)
191	bfd_close (disasm_bfd);
192	#endif
193	}
194
195	void
196	_jit_disassemble(jit_state_t *_jit)
197	{
198	#if DISASSEMBLER
199	if (disasm_bfd) {
200	# if defined(__arm__)
201	/* FIXME add mapping for prolog switching to arm and possible jump
202	* before first prolog also in arm mode */
203	disasm_info.disassembler_options = jit_cpu.thumb ? "force-thumb" : "";
204	# endif
205
206	disassemble(_jit->code.ptr, _jit->pc.uc - _jit->code.ptr);
207	}
208	#endif
209	}
210
211	#if DISASSEMBLER
212	/* Based on objdump source */
213	static int
214	disasm_compare_symbols(const void ap, const void bp)
215	{
216	const asymbol a = (const asymbol **)ap;
217	const asymbol b = (const asymbol **)bp;
218
219	if (bfd_asymbol_value(a) > bfd_asymbol_value(b))
220	return (1);
221	if (bfd_asymbol_value(a) < bfd_asymbol_value(b))
222	return (-1);
223	return (0);
224	}
225
226	#if __WORDSIZE == 32
227	# define address_buffer_length 16
228	# define address_buffer_format "%llx"
229	#else
230	# define address_buffer_length 32
231	# define address_buffer_format "%lx"
232	#endif
233	static void
234	disasm_print_address(bfd_vma addr, struct disassemble_info *info)
235	{
236	char *name;
237	char *file;
238	int line;
239	char buffer[address_buffer_length];
240
241	sprintf(buffer, address_buffer_format, (long long)addr);
242	(*info->fprintf_func)(info->stream, "0x%s", buffer);
243
244	# define _jit disasm_jit
245	# undef jit_pointer_p
246	# define jit_pointer_p(u) \
247	((u) >= _jit->code.ptr && (u) < _jit->pc.uc)
248	if (jit_pointer_p((jit_uint8_t *)(jit_word_t)addr)) {
249	if (jit_get_note((jit_uint8_t *)(jit_word_t)addr, &name, &file, &line))
250	(*info->fprintf_func)(info->stream, " %s:%s:%d",
251	name ? name : "",
252	file ? file : "",
253	line);
254	}
255	# undef jit_pointer_p
256	# undef _jit
257	else if (disasm_num_symbols) {
258	long low;
259	long high;
260	long offset;
261	asymbol *symbol;
262
263	low = 0;
264	high = disasm_num_symbols;
265	do {
266	offset = (low + high) >> 1;
267	symbol = disasm_symbols[offset];
268	if (bfd_asymbol_value(symbol) > addr)
269	high = offset - 1;
270	else if (bfd_asymbol_value(symbol) < addr)
271	low = offset + 1;
272	else
273	break;
274	} while (low < high);
275
276	if (offset >= 0 && offset < disasm_num_symbols) {
277	if (bfd_asymbol_value(symbol) < addr) {
278	while (++offset < disasm_num_symbols) {
279	symbol = disasm_symbols[offset];
280	if (bfd_asymbol_value(symbol) >= addr)
281	break;
282	}
283	}
284	else if (bfd_asymbol_value(symbol) > addr) {
285	while (offset--) {
286	if (bfd_asymbol_value(disasm_symbols[offset]) < addr)
287	break;
288	symbol = disasm_symbols[offset];
289	}
290	}
291	if (bfd_asymbol_value(symbol) == addr)
292	(*info->fprintf_func)(info->stream, " # %s", symbol->name);
293	}
294	}
295	}
296
297	static void
298	_disassemble(jit_state_t *_jit, jit_pointer_t code, jit_int32_t length)
299	{
300	int bytes;
301	char name, old_name;
302	char file, old_file;
303	int line, old_line;
304	#if __arm__
305	jit_int32_t offset;
306	jit_bool_t data_info;
307	jit_int32_t data_offset;
308	#endif
309	bfd_vma pc = (jit_uword_t)code;
310	bfd_vma end = (jit_uword_t)code + length;
311	char buffer[address_buffer_length];
312	#if DEVEL_DISASSEMBLER
313	jit_node_t *node;
314	jit_uword_t prevw;
315	#endif
316
317	#if __arm__
318	data_info = _jitc && _jitc->data_info.ptr;
319	data_offset = 0;
320	#endif
321	disasm_info.buffer = code;
322	disasm_info.buffer_vma = (jit_uword_t)code;
323	disasm_info.buffer_length = length;
324	old_file = old_name = NULL;
325	old_line = 0;
326	disasm_jit = _jit;
327	#if DEVEL_DISASSEMBLER
328	node = _jitc->head;
329	prevw = pc;
330	#endif
331	while (pc < end) {
332	#if DEVEL_DISASSEMBLER
333	while (node && (jit_uword_t)(prevw + node->offset) < (jit_uword_t)pc) {
334	prevw += node->offset;
335	node = node->next;
336	}
337	while (node && (jit_uword_t)(prevw + node->offset) == (jit_uword_t)pc) {
338	jit_print_node(node);
339	fputc('\n', stdout);
340	prevw += node->offset;
341	node = node->next;
342	}
343	#endif
344	#if __arm__
345	again:
346	if (data_info) {
347	while (_jitc->data_info.ptr[data_offset].code < pc) {
348	if (++data_offset >= _jitc->data_info.length) {
349	data_info = 0;
350	goto again;
351	}
352	}
353	if (pc == _jitc->data_info.ptr[data_offset].code) {
354	offset = _jitc->data_info.ptr[data_offset].length;
355	for (; offset >= 4; offset -= 4, pc += 4) {
356	bytes = sprintf(buffer, address_buffer_format, pc);
357	(*disasm_info.fprintf_func)(disasm_stream,
358	"%*c0x%s\t.data\t0x%08x\n",
359	16 - bytes, ' ', buffer,
360	(jit_uint32_t )
361	(jit_uint32_t)pc);
362	}
363	/* reset disassemble information instead of attempting
364	* to hack the arm specific backend data structures to
365	* tell it to forward the required number of bytes. */
366	disasm_info.buffer = (jit_pointer_t)(jit_uint32_t)pc;
367	disasm_info.buffer_vma = (jit_uword_t)pc;
368	if ((disasm_info.buffer_length = end - pc) <= 0)
369	break;
370	}
371	}
372	#endif
373	if (jit_get_note((jit_uint8_t *)(jit_word_t)pc, &name, &file, &line) &&
374	(name != old_name \|\| file != old_file \|\| line != old_line)) {
375	(*disasm_info.fprintf_func)(disasm_stream, "# %s:%s:%d\n",
376	name ? name : "",
377	file ? file : "",
378	line);
379	old_name = name;
380	old_file = file;
381	old_line = line;
382	}
383
384	bytes = sprintf(buffer, address_buffer_format, (long long)pc);
385	(disasm_info.fprintf_func)(disasm_stream, "%c0x%s\t",
386	16 - bytes, ' ', buffer);
387	pc += (*disasm_print)(pc, &disasm_info);
388	putc('\n', disasm_stream);
389	}
390	}
391	#endif