[linux-block.git] / scripts / sorttable.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * sorttable.c: Sort the kernel's table
 *
 * Added ORC unwind tables sort support and other updates:
 * Copyright (C) 1999-2019 Alibaba Group Holding Limited. by:
 * Shile Zhang <shile.zhang@linux.alibaba.com>
 *
 * Copyright 2011 - 2012 Cavium, Inc.
 *
 * Based on code taken from recortmcount.c which is:
 *
 * Copyright 2009 John F. Reiser <jreiser@BitWagon.com>.  All rights reserved.
 *
 * Restructured to fit Linux format, as well as other updates:
 * Copyright 2010 Steven Rostedt <srostedt@redhat.com>, Red Hat Inc.
 */

/*
 * Strategy: alter the vmlinux file in-place.
 */

#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <getopt.h>
#include <elf.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <tools/be_byteshift.h>
#include <tools/le_byteshift.h>

#ifndef EM_ARCOMPACT
#define EM_ARCOMPACT	93
#endif

#ifndef EM_XTENSA
#define EM_XTENSA	94
#endif

#ifndef EM_AARCH64
#define EM_AARCH64	183
#endif

#ifndef EM_MICROBLAZE
#define EM_MICROBLAZE	189
#endif

#ifndef EM_ARCV2
#define EM_ARCV2	195
#endif

static uint32_t (*r)(const uint32_t *);
static uint16_t (*r2)(const uint16_t *);
static uint64_t (*r8)(const uint64_t *);
static void (*w)(uint32_t, uint32_t *);
static void (*w2)(uint16_t, uint16_t *);
static void (*w8)(uint64_t, uint64_t *);
typedef void (*table_sort_t)(char *, int);

/*
 * Get the whole file as a programming convenience in order to avoid
 * malloc+lseek+read+free of many pieces.  If successful, then mmap
 * avoids copying unused pieces; else just read the whole file.
 * Open for both read and write.
 */
static void *mmap_file(char const *fname, size_t *size)
{
	int fd;
	struct stat sb;
	void *addr = NULL;

	fd = open(fname, O_RDWR);
	if (fd < 0) {
		perror(fname);
		return NULL;
	}
	if (fstat(fd, &sb) < 0) {
		perror(fname);
		goto out;
	}
	if (!S_ISREG(sb.st_mode)) {
		fprintf(stderr, "not a regular file: %s\n", fname);
		goto out;
	}

	addr = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
	if (addr == MAP_FAILED) {
		fprintf(stderr, "Could not mmap file: %s\n", fname);
		goto out;
	}

	*size = sb.st_size;

out:
	close(fd);
	return addr;
}

static uint32_t rbe(const uint32_t *x)
{
	return get_unaligned_be32(x);
}

static uint16_t r2be(const uint16_t *x)
{
	return get_unaligned_be16(x);
}

static uint64_t r8be(const uint64_t *x)
{
	return get_unaligned_be64(x);
}

static uint32_t rle(const uint32_t *x)
{
	return get_unaligned_le32(x);
}

static uint16_t r2le(const uint16_t *x)
{
	return get_unaligned_le16(x);
}

static uint64_t r8le(const uint64_t *x)
{
	return get_unaligned_le64(x);
}

static void wbe(uint32_t val, uint32_t *x)
{
	put_unaligned_be32(val, x);
}

static void w2be(uint16_t val, uint16_t *x)
{
	put_unaligned_be16(val, x);
}

static void w8be(uint64_t val, uint64_t *x)
{
	put_unaligned_be64(val, x);
}

static void wle(uint32_t val, uint32_t *x)
{
	put_unaligned_le32(val, x);
}

static void w2le(uint16_t val, uint16_t *x)
{
	put_unaligned_le16(val, x);
}

static void w8le(uint64_t val, uint64_t *x)
{
	put_unaligned_le64(val, x);
}

/*
 * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of
 * the way to -256..-1, to avoid conflicting with real section
 * indices.
 */
#define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1))

static inline int is_shndx_special(unsigned int i)
{
	return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
}

/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
static inline unsigned int get_secindex(unsigned int shndx,
					unsigned int sym_offs,
					const Elf32_Word *symtab_shndx_start)
{
	if (is_shndx_special(shndx))
		return SPECIAL(shndx);
	if (shndx != SHN_XINDEX)
		return shndx;
	return r(&symtab_shndx_start[sym_offs]);
}

/* 32 bit and 64 bit are very similar */
#include "sorttable.h"
#define SORTTABLE_64
#include "sorttable.h"

static int compare_relative_table(const void *a, const void *b)
{
	int32_t av = (int32_t)r(a);
	int32_t bv = (int32_t)r(b);

	if (av < bv)
		return -1;
	if (av > bv)
		return 1;
	return 0;
}

static void sort_relative_table(char *extab_image, int image_size)
{
	int i = 0;

	/*
	 * Do the same thing the runtime sort does, first normalize to
	 * being relative to the start of the section.
	 */
	while (i < image_size) {
		uint32_t *loc = (uint32_t *)(extab_image + i);
		w(r(loc) + i, loc);
		i += 4;
	}

	qsort(extab_image, image_size / 8, 8, compare_relative_table);

	/* Now denormalize. */
	i = 0;
	while (i < image_size) {
		uint32_t *loc = (uint32_t *)(extab_image + i);
		w(r(loc) - i, loc);
		i += 4;
	}
}

static void x86_sort_relative_table(char *extab_image, int image_size)
{
	int i = 0;

	while (i < image_size) {
		uint32_t *loc = (uint32_t *)(extab_image + i);

		w(r(loc) + i, loc);
		w(r(loc + 1) + i + 4, loc + 1);
		w(r(loc + 2) + i + 8, loc + 2);

		i += sizeof(uint32_t) * 3;
	}

	qsort(extab_image, image_size / 12, 12, compare_relative_table);

	i = 0;
	while (i < image_size) {
		uint32_t *loc = (uint32_t *)(extab_image + i);

		w(r(loc) - i, loc);
		w(r(loc + 1) - (i + 4), loc + 1);
		w(r(loc + 2) - (i + 8), loc + 2);

		i += sizeof(uint32_t) * 3;
	}
}

static int do_file(char const *const fname, void *addr)
{
	int rc = -1;
	Elf32_Ehdr *ehdr = addr;
	table_sort_t custom_sort = NULL;

	switch (ehdr->e_ident[EI_DATA]) {
	case ELFDATA2LSB:
		r	= rle;
		r2	= r2le;
		r8	= r8le;
		w	= wle;
		w2	= w2le;
		w8	= w8le;
		break;
	case ELFDATA2MSB:
		r	= rbe;
		r2	= r2be;
		r8	= r8be;
		w	= wbe;
		w2	= w2be;
		w8	= w8be;
		break;
	default:
		fprintf(stderr, "unrecognized ELF data encoding %d: %s\n",
			ehdr->e_ident[EI_DATA], fname);
		return -1;
	}

	if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0 ||
	    (r2(&ehdr->e_type) != ET_EXEC && r2(&ehdr->e_type) != ET_DYN) ||
	    ehdr->e_ident[EI_VERSION] != EV_CURRENT) {
		fprintf(stderr, "unrecognized ET_EXEC/ET_DYN file %s\n", fname);
		return -1;
	}

	switch (r2(&ehdr->e_machine)) {
	case EM_386:
	case EM_X86_64:
		custom_sort = x86_sort_relative_table;
		break;
	case EM_S390:
	case EM_AARCH64:
	case EM_PARISC:
	case EM_PPC:
	case EM_PPC64:
		custom_sort = sort_relative_table;
		break;
	case EM_ARCOMPACT:
	case EM_ARCV2:
	case EM_ARM:
	case EM_MICROBLAZE:
	case EM_MIPS:
	case EM_XTENSA:
		break;
	default:
		fprintf(stderr, "unrecognized e_machine %d %s\n",
			r2(&ehdr->e_machine), fname);
		return -1;
	}

	switch (ehdr->e_ident[EI_CLASS]) {
	case ELFCLASS32:
		if (r2(&ehdr->e_ehsize) != sizeof(Elf32_Ehdr) ||
		    r2(&ehdr->e_shentsize) != sizeof(Elf32_Shdr)) {
			fprintf(stderr,
				"unrecognized ET_EXEC/ET_DYN file: %s\n", fname);
			break;
		}
		rc = do_sort_32(ehdr, fname, custom_sort);
		break;
	case ELFCLASS64:
		{
		Elf64_Ehdr *const ghdr = (Elf64_Ehdr *)ehdr;
		if (r2(&ghdr->e_ehsize) != sizeof(Elf64_Ehdr) ||
		    r2(&ghdr->e_shentsize) != sizeof(Elf64_Shdr)) {
			fprintf(stderr,
				"unrecognized ET_EXEC/ET_DYN file: %s\n",
				fname);
			break;
		}
		rc = do_sort_64(ghdr, fname, custom_sort);
		}
		break;
	default:
		fprintf(stderr, "unrecognized ELF class %d %s\n",
			ehdr->e_ident[EI_CLASS], fname);
		break;
	}

	return rc;
}

int main(int argc, char *argv[])
{
	int i, n_error = 0;  /* gcc-4.3.0 false positive complaint */
	size_t size = 0;
	void *addr = NULL;

	if (argc < 2) {
		fprintf(stderr, "usage: sorttable vmlinux...\n");
		return 0;
	}

	/* Process each file in turn, allowing deep failure. */
	for (i = 1; i < argc; i++) {
		addr = mmap_file(argv[i], &size);
		if (!addr) {
			++n_error;
			continue;
		}

		if (do_file(argv[i], addr))
			++n_error;

		munmap(addr, size);
	}

	return !!n_error;
}
Commit	Line	Data
4317cf95	1	// SPDX-License-Identifier: GPL-2.0-only
a79f248b	2	/*
10916706	3	* sorttable.c: Sort the kernel's table
a79f248b	4	*
57fa1899 SZ	5	* Added ORC unwind tables sort support and other updates:
	6	* Copyright (C) 1999-2019 Alibaba Group Holding Limited. by:
	7	* Shile Zhang <shile.zhang@linux.alibaba.com>
	8	*
d59a1683	9	* Copyright 2011 - 2012 Cavium, Inc.
a79f248b DD	10	*
	11	* Based on code taken from recortmcount.c which is:
	12	*
	13	* Copyright 2009 John F. Reiser <jreiser@BitWagon.com>. All rights reserved.
a79f248b DD	14	*
a79f248b DD	15	* Restructured to fit Linux format, as well as other updates:
57fa1899	16	* Copyright 2010 Steven Rostedt <srostedt@redhat.com>, Red Hat Inc.
a79f248b DD	17	*/
	18
	19	/*
	20	* Strategy: alter the vmlinux file in-place.
	21	*/
	22
	23	#include <sys/types.h>
	24	#include <sys/mman.h>
	25	#include <sys/stat.h>
	26	#include <getopt.h>
	27	#include <elf.h>
	28	#include <fcntl.h>
a79f248b DD	29	#include <stdio.h>
	30	#include <stdlib.h>
	31	#include <string.h>
	32	#include <unistd.h>
	33
d59a1683 DD	34	#include <tools/be_byteshift.h>
	35	#include <tools/le_byteshift.h>
	36
f06d19e4 VG	37	#ifndef EM_ARCOMPACT
	38	#define EM_ARCOMPACT 93
	39	#endif
	40
25df8198 MF	41	#ifndef EM_XTENSA
	42	#define EM_XTENSA 94
	43	#endif
	44
adace895 WD	45	#ifndef EM_AARCH64
	46	#define EM_AARCH64 183
	47	#endif
	48
372c7209 MS	49	#ifndef EM_MICROBLAZE
	50	#define EM_MICROBLAZE 189
	51	#endif
	52
b3210d14 VG	53	#ifndef EM_ARCV2
	54	#define EM_ARCV2 195
	55	#endif
	56
6402e141 SZ	57	static uint32_t (r)(const uint32_t );
	58	static uint16_t (r2)(const uint16_t );
	59	static uint64_t (r8)(const uint64_t );
	60	static void (w)(uint32_t, uint32_t );
	61	static void (w2)(uint16_t, uint16_t );
	62	static void (w8)(uint64_t, uint64_t );
	63	typedef void (table_sort_t)(char , int);
	64
a79f248b DD	65	/*
	66	* Get the whole file as a programming convenience in order to avoid
	67	* malloc+lseek+read+free of many pieces. If successful, then mmap
	68	* avoids copying unused pieces; else just read the whole file.
	69	* Open for both read and write.
	70	*/
3c47b787	71	static void mmap_file(char const fname, size_t *size)
a79f248b	72	{
3c47b787 SZ	73	int fd;
	74	struct stat sb;
	75	void *addr = NULL;
a79f248b	76
3c47b787 SZ	77	fd = open(fname, O_RDWR);
3c47b787 SZ	78	if (fd < 0) {
a79f248b	79	perror(fname);
3c47b787 SZ	80	return NULL;
	81	}
	82	if (fstat(fd, &sb) < 0) {
	83	perror(fname);
	84	goto out;
a79f248b DD	85	}
	86	if (!S_ISREG(sb.st_mode)) {
	87	fprintf(stderr, "not a regular file: %s\n", fname);
3c47b787	88	goto out;
a79f248b	89	}
6402e141	90
3c47b787	91	addr = mmap(0, sb.st_size, PROT_READ\|PROT_WRITE, MAP_SHARED, fd, 0);
a79f248b	92	if (addr == MAP_FAILED) {
a79f248b	93	fprintf(stderr, "Could not mmap file: %s\n", fname);
3c47b787	94	goto out;
a79f248b	95	}
3c47b787 SZ	96
	97	*size = sb.st_size;
	98
	99	out:
	100	close(fd);
a79f248b DD	101	return addr;
	102	}
	103
d59a1683	104	static uint32_t rbe(const uint32_t *x)
a79f248b	105	{
d59a1683	106	return get_unaligned_be32(x);
a79f248b	107	}
6402e141	108
d59a1683	109	static uint16_t r2be(const uint16_t *x)
a79f248b	110	{
d59a1683	111	return get_unaligned_be16(x);
a79f248b	112	}
6402e141 SZ	113
6402e141 SZ	114	static uint64_t r8be(const uint64_t *x)
a79f248b	115	{
6402e141	116	return get_unaligned_be64(x);
a79f248b	117	}
6402e141	118
d59a1683 DD	119	static uint32_t rle(const uint32_t *x)
	120	{
	121	return get_unaligned_le32(x);
	122	}
6402e141	123
d59a1683	124	static uint16_t r2le(const uint16_t *x)
a79f248b	125	{
d59a1683	126	return get_unaligned_le16(x);
a79f248b DD	127	}
a79f248b DD	128
6402e141	129	static uint64_t r8le(const uint64_t *x)
d59a1683	130	{
6402e141	131	return get_unaligned_le64(x);
d59a1683	132	}
6402e141	133
d59a1683 DD	134	static void wbe(uint32_t val, uint32_t *x)
	135	{
	136	put_unaligned_be32(val, x);
	137	}
6402e141	138
d59a1683 DD	139	static void w2be(uint16_t val, uint16_t *x)
	140	{
	141	put_unaligned_be16(val, x);
	142	}
6402e141 SZ	143
6402e141 SZ	144	static void w8be(uint64_t val, uint64_t *x)
d59a1683	145	{
6402e141	146	put_unaligned_be64(val, x);
d59a1683	147	}
6402e141	148
d59a1683 DD	149	static void wle(uint32_t val, uint32_t *x)
	150	{
	151	put_unaligned_le32(val, x);
	152	}
6402e141	153
d59a1683	154	static void w2le(uint16_t val, uint16_t *x)
a79f248b	155	{
d59a1683	156	put_unaligned_le16(val, x);
a79f248b DD	157	}
a79f248b DD	158
6402e141 SZ	159	static void w8le(uint64_t val, uint64_t *x)
	160	{
	161	put_unaligned_le64(val, x);
	162	}
a79f248b	163
59c36455 JI	164	/*
	165	* Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of
	166	* the way to -256..-1, to avoid conflicting with real section
	167	* indices.
	168	*/
	169	#define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1))
	170
	171	static inline int is_shndx_special(unsigned int i)
	172	{
	173	return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
	174	}
	175
	176	/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
	177	static inline unsigned int get_secindex(unsigned int shndx,
	178	unsigned int sym_offs,
	179	const Elf32_Word *symtab_shndx_start)
	180	{
	181	if (is_shndx_special(shndx))
	182	return SPECIAL(shndx);
	183	if (shndx != SHN_XINDEX)
	184	return shndx;
	185	return r(&symtab_shndx_start[sym_offs]);
	186	}
	187
a79f248b	188	/* 32 bit and 64 bit are very similar */
10916706 SZ	189	#include "sorttable.h"
	190	#define SORTTABLE_64
	191	#include "sorttable.h"
a79f248b	192
eb608fb3	193	static int compare_relative_table(const void a, const void b)
d59a1683 DD	194	{
	195	int32_t av = (int32_t)r(a);
	196	int32_t bv = (int32_t)r(b);
	197
	198	if (av < bv)
	199	return -1;
	200	if (av > bv)
	201	return 1;
	202	return 0;
	203	}
	204
6402e141	205	static void sort_relative_table(char *extab_image, int image_size)
548acf19	206	{
6402e141	207	int i = 0;
548acf19	208
6402e141 SZ	209	/*
	210	* Do the same thing the runtime sort does, first normalize to
	211	* being relative to the start of the section.
	212	*/
548acf19 TL	213	while (i < image_size) {
548acf19 TL	214	uint32_t loc = (uint32_t )(extab_image + i);
548acf19	215	w(r(loc) + i, loc);
6402e141	216	i += 4;
548acf19 TL	217	}
548acf19 TL	218
6402e141	219	qsort(extab_image, image_size / 8, 8, compare_relative_table);
548acf19	220
6402e141	221	/* Now denormalize. */
548acf19 TL	222	i = 0;
	223	while (i < image_size) {
	224	uint32_t loc = (uint32_t )(extab_image + i);
548acf19	225	w(r(loc) - i, loc);
6402e141	226	i += 4;
548acf19 TL	227	}
	228	}
	229
6402e141	230	static void x86_sort_relative_table(char *extab_image, int image_size)
d59a1683	231	{
6402e141	232	int i = 0;
d59a1683	233
d59a1683 DD	234	while (i < image_size) {
d59a1683 DD	235	uint32_t loc = (uint32_t )(extab_image + i);
6402e141	236
d59a1683	237	w(r(loc) + i, loc);
6402e141 SZ	238	w(r(loc + 1) + i + 4, loc + 1);
	239	w(r(loc + 2) + i + 8, loc + 2);
	240
	241	i += sizeof(uint32_t) * 3;
d59a1683 DD	242	}
d59a1683 DD	243
6402e141	244	qsort(extab_image, image_size / 12, 12, compare_relative_table);
d59a1683	245
d59a1683 DD	246	i = 0;
	247	while (i < image_size) {
	248	uint32_t loc = (uint32_t )(extab_image + i);
6402e141	249
d59a1683	250	w(r(loc) - i, loc);
6402e141 SZ	251	w(r(loc + 1) - (i + 4), loc + 1);
	252	w(r(loc + 2) - (i + 8), loc + 2);
	253
	254	i += sizeof(uint32_t) * 3;
d59a1683 DD	255	}
d59a1683 DD	256	}
a79f248b	257
6402e141	258	static int do_file(char const const fname, void addr)
a79f248b	259	{
3c47b787	260	int rc = -1;
6402e141 SZ	261	Elf32_Ehdr *ehdr = addr;
6402e141 SZ	262	table_sort_t custom_sort = NULL;
a79f248b	263
a79f248b	264	switch (ehdr->e_ident[EI_DATA]) {
a79f248b	265	case ELFDATA2LSB:
6402e141 SZ	266	r = rle;
	267	r2 = r2le;
	268	r8 = r8le;
	269	w = wle;
	270	w2 = w2le;
	271	w8 = w8le;
a79f248b DD	272	break;
a79f248b DD	273	case ELFDATA2MSB:
6402e141 SZ	274	r = rbe;
	275	r2 = r2be;
	276	r8 = r8be;
	277	w = wbe;
	278	w2 = w2be;
	279	w8 = w8be;
a79f248b	280	break;
6402e141 SZ	281	default:
	282	fprintf(stderr, "unrecognized ELF data encoding %d: %s\n",
	283	ehdr->e_ident[EI_DATA], fname);
	284	return -1;
	285	}
	286
	287	if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0 \|\|
	288	(r2(&ehdr->e_type) != ET_EXEC && r2(&ehdr->e_type) != ET_DYN) \|\|
	289	ehdr->e_ident[EI_VERSION] != EV_CURRENT) {
7b957b6e	290	fprintf(stderr, "unrecognized ET_EXEC/ET_DYN file %s\n", fname);
3c47b787	291	return -1;
a79f248b DD	292	}
a79f248b DD	293
d59a1683	294	switch (r2(&ehdr->e_machine)) {
a79f248b	295	case EM_386:
a79f248b	296	case EM_X86_64:
548acf19 TL	297	custom_sort = x86_sort_relative_table;
548acf19 TL	298	break;
3193a98d	299	case EM_S390:
6c94f27a	300	case EM_AARCH64:
0de79858	301	case EM_PARISC:
5b9ff027 NP	302	case EM_PPC:
5b9ff027 NP	303	case EM_PPC64:
eb608fb3 HC	304	custom_sort = sort_relative_table;
eb608fb3 HC	305	break;
f06d19e4	306	case EM_ARCOMPACT:
b3210d14	307	case EM_ARCV2:
ee951c63	308	case EM_ARM:
372c7209	309	case EM_MICROBLAZE:
d59a1683	310	case EM_MIPS:
25df8198	311	case EM_XTENSA:
a79f248b	312	break;
6402e141 SZ	313	default:
	314	fprintf(stderr, "unrecognized e_machine %d %s\n",
	315	r2(&ehdr->e_machine), fname);
	316	return -1;
	317	}
a79f248b DD	318
a79f248b DD	319	switch (ehdr->e_ident[EI_CLASS]) {
a79f248b	320	case ELFCLASS32:
6402e141 SZ	321	if (r2(&ehdr->e_ehsize) != sizeof(Elf32_Ehdr) \|\|
6402e141 SZ	322	r2(&ehdr->e_shentsize) != sizeof(Elf32_Shdr)) {
a79f248b	323	fprintf(stderr,
7b957b6e	324	"unrecognized ET_EXEC/ET_DYN file: %s\n", fname);
3c47b787	325	break;
a79f248b	326	}
57cafdf2	327	rc = do_sort_32(ehdr, fname, custom_sort);
a79f248b	328	break;
6402e141 SZ	329	case ELFCLASS64:
6402e141 SZ	330	{
a79f248b	331	Elf64_Ehdr const ghdr = (Elf64_Ehdr )ehdr;
6402e141 SZ	332	if (r2(&ghdr->e_ehsize) != sizeof(Elf64_Ehdr) \|\|
6402e141 SZ	333	r2(&ghdr->e_shentsize) != sizeof(Elf64_Shdr)) {
a79f248b	334	fprintf(stderr,
6402e141 SZ	335	"unrecognized ET_EXEC/ET_DYN file: %s\n",
6402e141 SZ	336	fname);
3c47b787	337	break;
a79f248b	338	}
57cafdf2	339	rc = do_sort_64(ghdr, fname, custom_sort);
6402e141 SZ	340	}
	341	break;
	342	default:
	343	fprintf(stderr, "unrecognized ELF class %d %s\n",
	344	ehdr->e_ident[EI_CLASS], fname);
a79f248b DD	345	break;
a79f248b DD	346	}
a79f248b	347
3c47b787	348	return rc;
a79f248b DD	349	}
a79f248b DD	350
6402e141	351	int main(int argc, char *argv[])
a79f248b	352	{
3c47b787 SZ	353	int i, n_error = 0; /* gcc-4.3.0 false positive complaint */
	354	size_t size = 0;
	355	void *addr = NULL;
a79f248b DD	356
a79f248b DD	357	if (argc < 2) {
10916706	358	fprintf(stderr, "usage: sorttable vmlinux...\n");
a79f248b DD	359	return 0;
	360	}
	361
	362	/* Process each file in turn, allowing deep failure. */
	363	for (i = 1; i < argc; i++) {
3c47b787 SZ	364	addr = mmap_file(argv[i], &size);
	365	if (!addr) {
	366	++n_error;
	367	continue;
	368	}
a79f248b	369
3c47b787	370	if (do_file(argv[i], addr))
a79f248b	371	++n_error;
3c47b787 SZ	372
3c47b787 SZ	373	munmap(addr, size);
a79f248b	374	}
6402e141	375
a79f248b DD	376	return !!n_error;
a79f248b DD	377	}