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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ctfdump/ctfdump.c	Lines:	0	306	0.0 %
Date:	2017-11-13	Branches:	0	204	0.0 %


/*	$OpenBSD: ctfdump.c,v 1.19 2017/11/06 14:59:27 mpi Exp $ */

/*
 * Copyright (c) 2016 Martin Pieuchot <mpi@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ctf.h>

#include <elf.h>
#include <err.h>
#include <fcntl.h>
#include <locale.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#ifdef ZLIB
#include <zlib.h>
#endif /* ZLIB */

#ifndef nitems
#define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
#endif

#define DUMP_OBJECT	(1 << 0)
#define DUMP_FUNCTION	(1 << 1)
#define DUMP_HEADER	(1 << 2)
#define DUMP_LABEL	(1 << 3)
#define DUMP_STRTAB	(1 << 4)
#define DUMP_STATISTIC	(1 << 5)
#define DUMP_TYPE	(1 << 6)

int		 dump(const char *, uint8_t);
int		 isctf(const char *, size_t);
__dead void	 usage(void);

int		 ctf_dump(const char *, size_t, uint8_t);
void		 ctf_dump_type(struct ctf_header *, const char *, off_t,
		     uint32_t, uint32_t *, uint32_t);
const char	*ctf_kind2name(uint16_t);
const char	*ctf_enc2name(uint16_t);
const char	*ctf_fpenc2name(uint16_t);
const char	*ctf_off2name(struct ctf_header *, const char *, off_t,
		     uint32_t);

int		 elf_dump(char *, size_t, uint8_t);
const char	*elf_idx2sym(size_t *, uint8_t);

/* elf.c */
int		 iself(const char *, size_t);
int		 elf_getshstab(const char *, size_t, const char **, size_t *);
ssize_t		 elf_getsymtab(const char *, size_t filesize, const char *,
		     size_t, const Elf_Sym **, size_t *, const char **,
		     size_t *);
ssize_t		 elf_getsection(char *, size_t, const char *, const char *,
		     size_t, const char **, size_t *);

char		*decompress(const char *, size_t, off_t);

int
main(int argc, char *argv[])
{
	const char *filename;
	uint8_t flags = 0;
	int ch, error = 0;

	setlocale(LC_ALL, "");

	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
		err(1, "pledge");

	while ((ch = getopt(argc, argv, "dfhlst")) != -1) {
		switch (ch) {
		case 'd':
			flags |= DUMP_OBJECT;
			break;
		case 'f':
			flags |= DUMP_FUNCTION;
			break;
		case 'h':
			flags |= DUMP_HEADER;
			break;
		case 'l':
			flags |= DUMP_LABEL;
			break;
		case 's':
			flags |= DUMP_STRTAB;
			break;
		case 't':
			flags |= DUMP_TYPE;
			break;
		default:
			usage();
		}
	}

	argc -= optind;
	argv += optind;

	if (argc <= 0)
		usage();

	/* Dump everything by default */
	if (flags == 0)
		flags = 0xff;

	while ((filename = *argv++) != NULL)
		error |= dump(filename, flags);

	return error;
}

int
dump(const char *path, uint8_t flags)
{
	struct stat		 st;
	int			 fd, error = 1;
	char			*p;

	fd = open(path, O_RDONLY);
	if (fd == -1) {
		warn("open");
		return 1;
	}
	if (fstat(fd, &st) == -1) {
		warn("fstat");
		close(fd);
		return 1;
	}
	if ((uintmax_t)st.st_size > SIZE_MAX) {
		warnx("file too big to fit memory");
		close(fd);
		return 1;
	}

	p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
	if (p == MAP_FAILED)
		err(1, "mmap");

	if (iself(p, st.st_size)) {
		error = elf_dump(p, st.st_size, flags);
	} else if (isctf(p, st.st_size)) {
		error = ctf_dump(p, st.st_size, flags);
	}

	munmap(p, st.st_size);
	close(fd);

	return error;
}

const char		*strtab;
const Elf_Sym		*symtab;
size_t			 strtabsz, nsymb;

const char *
elf_idx2sym(size_t *idx, uint8_t type)
{
	const Elf_Sym	*st;
	size_t		 i;

	if (strtab == NULL)
		return NULL;

	for (i = *idx + 1; i < nsymb; i++) {
		st = &symtab[i];

		if (ELF_ST_TYPE(st->st_info) != type)
			continue;

		if (st->st_name >= strtabsz)
			break;

		*idx = i;
		return strtab + st->st_name;
	}

	return NULL;
}

int
elf_dump(char *p, size_t filesize, uint8_t flags)
{
	Elf_Ehdr		*eh = (Elf_Ehdr *)p;
	Elf_Shdr		*sh;
	const char		*shstab;
	size_t			 i, shstabsz;

	/* Find section header string table location and size. */
	if (elf_getshstab(p, filesize, &shstab, &shstabsz))
		return 1;

	/* Find symbol table and associated string table. */
	if (elf_getsymtab(p, filesize, shstab, shstabsz, &symtab, &nsymb,
	    &strtab, &strtabsz) == -1)
		warnx("symbol table not found");

	/* Find CTF section and dump it. */
	for (i = 0; i < eh->e_shnum; i++) {
		sh = (Elf_Shdr *)(p + eh->e_shoff + i * eh->e_shentsize);

		if ((sh->sh_link >= eh->e_shnum) ||
		    (sh->sh_name >= shstabsz))
			continue;

		if (strncmp(shstab + sh->sh_name, ELF_CTF, strlen(ELF_CTF)))
			continue;

		if ((sh->sh_offset + sh->sh_size) > filesize)
			continue;

		if (!isctf(p + sh->sh_offset, sh->sh_size))
			break;

		return ctf_dump(p + sh->sh_offset, sh->sh_size, flags);
	}

	warnx("%s section not found", ELF_CTF);
	return 1;
}

int
isctf(const char *p, size_t filesize)
{
	struct ctf_header	*cth = (struct ctf_header *)p;
	off_t 			 dlen;

	if (filesize < sizeof(struct ctf_header)) {
		warnx("file too small to be CTF");
		return 0;
	}

	if (cth->cth_magic != CTF_MAGIC || cth->cth_version != CTF_VERSION)
		return 0;

	dlen = (off_t)cth->cth_stroff + cth->cth_strlen;
	if (dlen > (off_t)filesize && !(cth->cth_flags & CTF_F_COMPRESS)) {
		warnx("bogus file size");
		return 0;
	}

	if ((cth->cth_lbloff & 3) || (cth->cth_objtoff & 1) ||
	    (cth->cth_funcoff & 1) || (cth->cth_typeoff & 3)) {
		warnx("wrongly aligned offset");
		return 0;
	}

	if ((cth->cth_lbloff >= dlen) || (cth->cth_objtoff >= dlen) ||
	    (cth->cth_funcoff >= dlen) || (cth->cth_typeoff >= dlen)) {
		warnx("truncated file");
		return 0;
	}

	if ((cth->cth_lbloff > cth->cth_objtoff) ||
	    (cth->cth_objtoff > cth->cth_funcoff) ||
	    (cth->cth_funcoff > cth->cth_typeoff) ||
	    (cth->cth_typeoff > cth->cth_stroff)) {
		warnx("corrupted file");
		return 0;
	}

	return 1;
}

int
ctf_dump(const char *p, size_t size, uint8_t flags)
{
	struct ctf_header	*cth = (struct ctf_header *)p;
	off_t 			 dlen;
	char			*data;

	dlen = (off_t)cth->cth_stroff + cth->cth_strlen;
	if (cth->cth_flags & CTF_F_COMPRESS) {
		data = decompress(p + sizeof(*cth), size - sizeof(*cth), dlen);
		if (data == NULL)
			return 1;
	} else {
		data = (char *)p + sizeof(*cth);
	}

	if (flags & DUMP_HEADER) {
		printf("  cth_magic    = 0x%04x\n", cth->cth_magic);
		printf("  cth_version  = %u\n", cth->cth_version);
		printf("  cth_flags    = 0x%02x\n", cth->cth_flags);
		printf("  cth_parlabel = %s\n",
		    ctf_off2name(cth, data, dlen, cth->cth_parlabel));
		printf("  cth_parname  = %s\n",
		    ctf_off2name(cth, data, dlen, cth->cth_parname));
		printf("  cth_lbloff   = %u\n", cth->cth_lbloff);
		printf("  cth_objtoff  = %u\n", cth->cth_objtoff);
		printf("  cth_funcoff  = %u\n", cth->cth_funcoff);
		printf("  cth_typeoff  = %u\n", cth->cth_typeoff);
		printf("  cth_stroff   = %u\n", cth->cth_stroff);
		printf("  cth_strlen   = %u\n", cth->cth_strlen);
		printf("\n");
	}

	if (flags & DUMP_LABEL) {
		uint32_t		 lbloff = cth->cth_lbloff;
		struct ctf_lblent	*ctl;

		while (lbloff < cth->cth_objtoff) {
			ctl = (struct ctf_lblent *)(data + lbloff);

			printf("  %5u %s\n", ctl->ctl_typeidx,
			    ctf_off2name(cth, data, dlen, ctl->ctl_label));

			lbloff += sizeof(*ctl);
		}
		printf("\n");
	}

	if (flags & DUMP_OBJECT) {
		uint32_t		 objtoff = cth->cth_objtoff;
		size_t			 idx = 0, i = 0;
		uint16_t		*dsp;
		const char		*s;
		int			 l;

		while (objtoff < cth->cth_funcoff) {
			dsp = (uint16_t *)(data + objtoff);

			l = printf("  [%zu] %u", i++, *dsp);
			if ((s = elf_idx2sym(&idx, STT_OBJECT)) != NULL)
				printf("%*s %s (%zu)\n", (14 - l), "", s, idx);
			else
				printf("\n");

			objtoff += sizeof(*dsp);
		}
		printf("\n");
	}

	if (flags & DUMP_FUNCTION) {
		uint16_t		*fsp, kind, vlen;
		uint16_t		*fstart, *fend;
		size_t			 idx = 0, i = -1;
		const char		*s;
		int			 l;

		fstart = (uint16_t *)(data + cth->cth_funcoff);
		fend = (uint16_t *)(data + cth->cth_typeoff);

		fsp = fstart;
		while (fsp < fend) {
			kind = CTF_INFO_KIND(*fsp);
			vlen = CTF_INFO_VLEN(*fsp);
			s = elf_idx2sym(&idx, STT_FUNC);
			fsp++;
			i++;

			if (kind == CTF_K_UNKNOWN && vlen == 0)
				continue;

			l = printf("  [%zu] FUNC ", i);
			if (s != NULL)
				printf("(%s) ", s);
			printf("returns: %u args: (", *fsp++);
			while (vlen-- > 0 && fsp < fend)
				printf("%u%s", *fsp++, (vlen > 0) ? ", " : "");
			printf(")\n");
		}
		printf("\n");
	}

	if (flags & DUMP_TYPE) {
		uint32_t		 idx = 1, offset = cth->cth_typeoff;
		uint32_t		 stroff = cth->cth_stroff;

		while (offset < stroff) {
			ctf_dump_type(cth, data, dlen, stroff, &offset, idx++);
		}
		printf("\n");
	}

	if (flags & DUMP_STRTAB) {
		uint32_t		 offset = 0;
		const char		*str;

		while (offset < cth->cth_strlen) {
			str = ctf_off2name(cth, data, dlen, offset);

			printf("  [%u] ", offset);
			if (strcmp(str, "(anon)"))
				offset += printf("%s\n", str);
			else {
				printf("\\0\n");
				offset++;
			}
		}
		printf("\n");
	}

	if (cth->cth_flags & CTF_F_COMPRESS)
		free(data);

	return 0;
}

void
ctf_dump_type(struct ctf_header *cth, const char *data, off_t dlen,
    uint32_t stroff, uint32_t *offset, uint32_t idx)
{
	const char		*p = data + *offset;
	const struct ctf_type	*ctt = (struct ctf_type *)p;
	const struct ctf_array	*cta;
	uint16_t		*argp, i, kind, vlen, root;
	uint32_t		 eob, toff;
	uint64_t		 size;
	const char		*name, *kname;

	kind = CTF_INFO_KIND(ctt->ctt_info);
	vlen = CTF_INFO_VLEN(ctt->ctt_info);
	root = CTF_INFO_ISROOT(ctt->ctt_info);
	name = ctf_off2name(cth, data, dlen, ctt->ctt_name);

	if (root)
		printf("  <%u> ", idx);
	else
		printf("  [%u] ", idx);

	if ((kname = ctf_kind2name(kind)) != NULL)
		printf("%s %s", kname, name);

	if (ctt->ctt_size <= CTF_MAX_SIZE) {
		size = ctt->ctt_size;
		toff = sizeof(struct ctf_stype);
	} else {
		size = CTF_TYPE_LSIZE(ctt);
		toff = sizeof(struct ctf_type);
	}

	switch (kind) {
	case CTF_K_UNKNOWN:
	case CTF_K_FORWARD:
		break;
	case CTF_K_INTEGER:
		eob = *((uint32_t *)(p + toff));
		toff += sizeof(uint32_t);
		printf(" encoding=%s offset=%u bits=%u",
		    ctf_enc2name(CTF_INT_ENCODING(eob)), CTF_INT_OFFSET(eob),
		    CTF_INT_BITS(eob));
		break;
	case CTF_K_FLOAT:
		eob = *((uint32_t *)(p + toff));
		toff += sizeof(uint32_t);
		printf(" encoding=%s offset=%u bits=%u",
		    ctf_fpenc2name(CTF_FP_ENCODING(eob)), CTF_FP_OFFSET(eob),
		    CTF_FP_BITS(eob));
		break;
	case CTF_K_ARRAY:
		cta = (struct ctf_array *)(p + toff);
		printf(" content: %u index: %u nelems: %u\n", cta->cta_contents,
		    cta->cta_index, cta->cta_nelems);
		toff += sizeof(struct ctf_array);
		break;
	case CTF_K_FUNCTION:
		argp = (uint16_t *)(p + toff);
		printf(" returns: %u args: (%u", ctt->ctt_type, *argp);
		for (i = 1; i < vlen; i++) {
			argp++;
			printf(", %u", *argp);
		}
		printf(")");
		toff += (vlen + (vlen & 1)) * sizeof(uint16_t);
		break;
	case CTF_K_STRUCT:
	case CTF_K_UNION:
		printf(" (%llu bytes)\n", size);

		if (size < CTF_LSTRUCT_THRESH) {
			for (i = 0; i < vlen; i++) {
				struct ctf_member	*ctm;

				if (toff > (stroff - sizeof(*ctm)))
					break;

				ctm = (struct ctf_member *)(p + toff);
				toff += sizeof(struct ctf_member);

				printf("\t%s type=%u off=%u\n",
				    ctf_off2name(cth, data, dlen,
					ctm->ctm_name),
				    ctm->ctm_type, ctm->ctm_offset);
			}
		} else {
			for (i = 0; i < vlen; i++) {
				struct ctf_lmember	*ctlm;

				if (toff > (stroff - sizeof(*ctlm)))
					break;

				ctlm = (struct ctf_lmember *)(p + toff);
				toff += sizeof(struct ctf_lmember);

				printf("\t%s type=%u off=%llu\n",
				    ctf_off2name(cth, data, dlen,
					ctlm->ctlm_name),
				    ctlm->ctlm_type, CTF_LMEM_OFFSET(ctlm));
			}
		}
		break;
	case CTF_K_ENUM:
		printf("\n");
		for (i = 0; i < vlen; i++) {
			struct ctf_enum	*cte;

			if (toff > (stroff - sizeof(*cte)))
				break;

			cte = (struct ctf_enum *)(p + toff);
			toff += sizeof(struct ctf_enum);

			printf("\t%s = %d\n",
			    ctf_off2name(cth, data, dlen, cte->cte_name),
			    cte->cte_value);
		}
		break;
	case CTF_K_POINTER:
	case CTF_K_TYPEDEF:
	case CTF_K_VOLATILE:
	case CTF_K_CONST:
	case CTF_K_RESTRICT:
		printf(" refers to %u", ctt->ctt_type);
		break;
	default:
		errx(1, "incorrect type %u at offset %u", kind, *offset);
	}

	printf("\n");

	*offset += toff;
}

const char *
ctf_kind2name(uint16_t kind)
{
	static const char *kind_name[] = { NULL, "INTEGER", "FLOAT", "POINTER",
	   "ARRAY", "FUNCTION", "STRUCT", "UNION", "ENUM", "FORWARD",
	   "TYPEDEF", "VOLATILE", "CONST", "RESTRICT" };

	if (kind >= nitems(kind_name))
		return NULL;

	return kind_name[kind];
}

const char *
ctf_enc2name(uint16_t enc)
{
	static const char *enc_name[] = { "SIGNED", "CHAR", "SIGNED CHAR",
	    "BOOL", "SIGNED BOOL" };
	static char invalid[7];

	if (enc == CTF_INT_VARARGS)
		return "VARARGS";

	if (enc > 0 && enc <= nitems(enc_name))
		return enc_name[enc - 1];

	snprintf(invalid, sizeof(invalid), "0x%x", enc);
	return invalid;
}

const char *
ctf_fpenc2name(uint16_t enc)
{
	static const char *enc_name[] = { "SINGLE", "DOUBLE", NULL, NULL,
	    NULL, "LDOUBLE" };
	static char invalid[7];

	if (enc > 0 && enc <= nitems(enc_name) && enc_name[enc - 1] != NULL)
		return enc_name[enc - 1];

	snprintf(invalid, sizeof(invalid), "0x%x", enc);
	return invalid;
}

const char *
ctf_off2name(struct ctf_header *cth, const char *data, off_t dlen,
    uint32_t offset)
{
	const char		*name;

	if (CTF_NAME_STID(offset) != CTF_STRTAB_0)
		return "external";

	if (CTF_NAME_OFFSET(offset) >= cth->cth_strlen)
		return "exceeds strlab";

	if (cth->cth_stroff + CTF_NAME_OFFSET(offset) >= dlen)
		return "invalid";

	name = data + cth->cth_stroff + CTF_NAME_OFFSET(offset);
	if (*name == '\0')
		return "(anon)";

	return name;
}

char *
decompress(const char *buf, size_t size, off_t len)
{
#ifdef ZLIB
	z_stream		 stream;
	char			*data;
	int			 error;

	data = malloc(len);
	if (data == NULL) {
		warn(NULL);
		return NULL;
	}

	memset(&stream, 0, sizeof(stream));
	stream.next_in = (void *)buf;
	stream.avail_in = size;
	stream.next_out = (uint8_t *)data;
	stream.avail_out = len;

	if ((error = inflateInit(&stream)) != Z_OK) {
		warnx("zlib inflateInit failed: %s", zError(error));
		goto exit;
	}

	if ((error = inflate(&stream, Z_FINISH)) != Z_STREAM_END) {
		warnx("zlib inflate failed: %s", zError(error));
		inflateEnd(&stream);
		goto exit;
	}

	if ((error = inflateEnd(&stream)) != Z_OK) {
		warnx("zlib inflateEnd failed: %s", zError(error));
		goto exit;
	}

	if (stream.total_out != len) {
		warnx("decompression failed: %llu != %llu",
		    stream.total_out, len);
		goto exit;
	}

	return data;

exit:
	free(data);
#endif /* ZLIB */
	return NULL;
}

__dead void
usage(void)
{
	fprintf(stderr, "usage: %s [-dfhlst] file ...\n",
	    getprogname());
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ctfdump.c,v 1.19 2017/11/06 14:59:27 mpi Exp $ */
2
3			/*
4			* Copyright (c) 2016 Martin Pieuchot <mpi@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <sys/stat.h>
21			#include <sys/mman.h>
22			#include <sys/ctf.h>
23
24			#include <elf.h>
25			#include <err.h>
26			#include <fcntl.h>
27			#include <locale.h>
28			#include <stdio.h>
29			#include <stdint.h>
30			#include <stdlib.h>
31			#include <string.h>
32			#include <unistd.h>
33
34			#ifdef ZLIB
35			#include <zlib.h>
36			#endif /* ZLIB */
37
38			#ifndef nitems
39			#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
40			#endif
41
42			#define DUMP_OBJECT (1 << 0)
43			#define DUMP_FUNCTION (1 << 1)
44			#define DUMP_HEADER (1 << 2)
45			#define DUMP_LABEL (1 << 3)
46			#define DUMP_STRTAB (1 << 4)
47			#define DUMP_STATISTIC (1 << 5)
48			#define DUMP_TYPE (1 << 6)
49
50			int dump(const char *, uint8_t);
51			int isctf(const char *, size_t);
52			__dead void usage(void);
53
54			int ctf_dump(const char *, size_t, uint8_t);
55			void ctf_dump_type(struct ctf_header , const char , off_t,
56			uint32_t, uint32_t *, uint32_t);
57			const char *ctf_kind2name(uint16_t);
58			const char *ctf_enc2name(uint16_t);
59			const char *ctf_fpenc2name(uint16_t);
60			const char ctf_off2name(struct ctf_header , const char *, off_t,
61			uint32_t);
62
63			int elf_dump(char *, size_t, uint8_t);
64			const char elf_idx2sym(size_t , uint8_t);
65
66			/* elf.c */
67			int iself(const char *, size_t);
68			int elf_getshstab(const char , size_t, const char , size_t );
69			ssize_t elf_getsymtab(const char , size_t filesize, const char ,
70			size_t, const Elf_Sym *, size_t , const char **,
71			size_t *);
72			ssize_t elf_getsection(char , size_t, const char , const char *,
73			size_t, const char *, size_t );
74
75			char decompress(const char , size_t, off_t);
76
77			int
78			main(int argc, char *argv[])
79			{
80			const char *filename;
81			uint8_t flags = 0;
82			int ch, error = 0;
83
84			setlocale(LC_ALL, "");
85
86			if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
87			err(1, "pledge");
88
89			while ((ch = getopt(argc, argv, "dfhlst")) != -1) {
90			switch (ch) {
91			case 'd':
92			flags \|= DUMP_OBJECT;
93			break;
94			case 'f':
95			flags \|= DUMP_FUNCTION;
96			break;
97			case 'h':
98			flags \|= DUMP_HEADER;
99			break;
100			case 'l':
101			flags \|= DUMP_LABEL;
102			break;
103			case 's':
104			flags \|= DUMP_STRTAB;
105			break;
106			case 't':
107			flags \|= DUMP_TYPE;
108			break;
109			default:
110			usage();
111			}
112			}
113
114			argc -= optind;
115			argv += optind;
116
117			if (argc <= 0)
118			usage();
119
120			/* Dump everything by default */
121			if (flags == 0)
122			flags = 0xff;
123
124			while ((filename = *argv++) != NULL)
125			error \|= dump(filename, flags);
126
127			return error;
128			}
129
130			int
131			dump(const char *path, uint8_t flags)
132			{
133			struct stat st;
134			int fd, error = 1;
135			char *p;
136
137			fd = open(path, O_RDONLY);
138			if (fd == -1) {
139			warn("open");
140			return 1;
141			}
142			if (fstat(fd, &st) == -1) {
143			warn("fstat");
144			close(fd);
145			return 1;
146			}
147			if ((uintmax_t)st.st_size > SIZE_MAX) {
148			warnx("file too big to fit memory");
149			close(fd);
150			return 1;
151			}
152
153			p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
154			if (p == MAP_FAILED)
155			err(1, "mmap");
156
157			if (iself(p, st.st_size)) {
158			error = elf_dump(p, st.st_size, flags);
159			} else if (isctf(p, st.st_size)) {
160			error = ctf_dump(p, st.st_size, flags);
161			}
162
163			munmap(p, st.st_size);
164			close(fd);
165
166			return error;
167			}
168
169			const char *strtab;
170			const Elf_Sym *symtab;
171			size_t strtabsz, nsymb;
172
173			const char *
174			elf_idx2sym(size_t *idx, uint8_t type)
175			{
176			const Elf_Sym *st;
177			size_t i;
178
179			if (strtab == NULL)
180			return NULL;
181
182			for (i = *idx + 1; i < nsymb; i++) {
183			st = &symtab[i];
184
185			if (ELF_ST_TYPE(st->st_info) != type)
186			continue;
187
188			if (st->st_name >= strtabsz)
189			break;
190
191			*idx = i;
192			return strtab + st->st_name;
193			}
194
195			return NULL;
196			}
197
198			int
199			elf_dump(char *p, size_t filesize, uint8_t flags)
200			{
201			Elf_Ehdr eh = (Elf_Ehdr )p;
202			Elf_Shdr *sh;
203			const char *shstab;
204			size_t i, shstabsz;
205
206			/* Find section header string table location and size. */
207			if (elf_getshstab(p, filesize, &shstab, &shstabsz))
208			return 1;
209
210			/* Find symbol table and associated string table. */
211			if (elf_getsymtab(p, filesize, shstab, shstabsz, &symtab, &nsymb,
212			&strtab, &strtabsz) == -1)
213			warnx("symbol table not found");
214
215			/* Find CTF section and dump it. */
216			for (i = 0; i < eh->e_shnum; i++) {
217			sh = (Elf_Shdr )(p + eh->e_shoff + i eh->e_shentsize);
218
219			if ((sh->sh_link >= eh->e_shnum) \|\|
220			(sh->sh_name >= shstabsz))
221			continue;
222
223			if (strncmp(shstab + sh->sh_name, ELF_CTF, strlen(ELF_CTF)))
224			continue;
225
226			if ((sh->sh_offset + sh->sh_size) > filesize)
227			continue;
228
229			if (!isctf(p + sh->sh_offset, sh->sh_size))
230			break;
231
232			return ctf_dump(p + sh->sh_offset, sh->sh_size, flags);
233			}
234
235			warnx("%s section not found", ELF_CTF);
236			return 1;
237			}
238
239			int
240			isctf(const char *p, size_t filesize)
241			{
242			struct ctf_header cth = (struct ctf_header )p;
243			off_t dlen;
244
245			if (filesize < sizeof(struct ctf_header)) {
246			warnx("file too small to be CTF");
247			return 0;
248			}
249
250			if (cth->cth_magic != CTF_MAGIC \|\| cth->cth_version != CTF_VERSION)
251			return 0;
252
253			dlen = (off_t)cth->cth_stroff + cth->cth_strlen;
254			if (dlen > (off_t)filesize && !(cth->cth_flags & CTF_F_COMPRESS)) {
255			warnx("bogus file size");
256			return 0;
257			}
258
259			if ((cth->cth_lbloff & 3) \|\| (cth->cth_objtoff & 1) \|\|
260			(cth->cth_funcoff & 1) \|\| (cth->cth_typeoff & 3)) {
261			warnx("wrongly aligned offset");
262			return 0;
263			}
264
265			if ((cth->cth_lbloff >= dlen) \|\| (cth->cth_objtoff >= dlen) \|\|
266			(cth->cth_funcoff >= dlen) \|\| (cth->cth_typeoff >= dlen)) {
267			warnx("truncated file");
268			return 0;
269			}
270
271			if ((cth->cth_lbloff > cth->cth_objtoff) \|\|
272			(cth->cth_objtoff > cth->cth_funcoff) \|\|
273			(cth->cth_funcoff > cth->cth_typeoff) \|\|
274			(cth->cth_typeoff > cth->cth_stroff)) {
275			warnx("corrupted file");
276			return 0;
277			}
278
279			return 1;
280			}
281
282			int
283			ctf_dump(const char *p, size_t size, uint8_t flags)
284			{
285			struct ctf_header cth = (struct ctf_header )p;
286			off_t dlen;
287			char *data;
288
289			dlen = (off_t)cth->cth_stroff + cth->cth_strlen;
290			if (cth->cth_flags & CTF_F_COMPRESS) {
291			data = decompress(p + sizeof(cth), size - sizeof(cth), dlen);
292			if (data == NULL)
293			return 1;
294			} else {
295			data = (char )p + sizeof(cth);
296			}
297
298			if (flags & DUMP_HEADER) {
299			printf(" cth_magic = 0x%04x\n", cth->cth_magic);
300			printf(" cth_version = %u\n", cth->cth_version);
301			printf(" cth_flags = 0x%02x\n", cth->cth_flags);
302			printf(" cth_parlabel = %s\n",
303			ctf_off2name(cth, data, dlen, cth->cth_parlabel));
304			printf(" cth_parname = %s\n",
305			ctf_off2name(cth, data, dlen, cth->cth_parname));
306			printf(" cth_lbloff = %u\n", cth->cth_lbloff);
307			printf(" cth_objtoff = %u\n", cth->cth_objtoff);
308			printf(" cth_funcoff = %u\n", cth->cth_funcoff);
309			printf(" cth_typeoff = %u\n", cth->cth_typeoff);
310			printf(" cth_stroff = %u\n", cth->cth_stroff);
311			printf(" cth_strlen = %u\n", cth->cth_strlen);
312			printf("\n");
313			}
314
315			if (flags & DUMP_LABEL) {
316			uint32_t lbloff = cth->cth_lbloff;
317			struct ctf_lblent *ctl;
318
319			while (lbloff < cth->cth_objtoff) {
320			ctl = (struct ctf_lblent *)(data + lbloff);
321
322			printf(" %5u %s\n", ctl->ctl_typeidx,
323			ctf_off2name(cth, data, dlen, ctl->ctl_label));
324
325			lbloff += sizeof(*ctl);
326			}
327			printf("\n");
328			}
329
330			if (flags & DUMP_OBJECT) {
331			uint32_t objtoff = cth->cth_objtoff;
332			size_t idx = 0, i = 0;
333			uint16_t *dsp;
334			const char *s;
335			int l;
336
337			while (objtoff < cth->cth_funcoff) {
338			dsp = (uint16_t *)(data + objtoff);
339
340			l = printf(" [%zu] %u", i++, *dsp);
341			if ((s = elf_idx2sym(&idx, STT_OBJECT)) != NULL)
342			printf("%*s %s (%zu)\n", (14 - l), "", s, idx);
343			else
344			printf("\n");
345
346			objtoff += sizeof(*dsp);
347			}
348			printf("\n");
349			}
350
351			if (flags & DUMP_FUNCTION) {
352			uint16_t *fsp, kind, vlen;
353			uint16_t fstart, fend;
354			size_t idx = 0, i = -1;
355			const char *s;
356			int l;
357
358			fstart = (uint16_t *)(data + cth->cth_funcoff);
359			fend = (uint16_t *)(data + cth->cth_typeoff);
360
361			fsp = fstart;
362			while (fsp < fend) {
363			kind = CTF_INFO_KIND(*fsp);
364			vlen = CTF_INFO_VLEN(*fsp);
365			s = elf_idx2sym(&idx, STT_FUNC);
366			fsp++;
367			i++;
368
369			if (kind == CTF_K_UNKNOWN && vlen == 0)
370			continue;
371
372			l = printf(" [%zu] FUNC ", i);
373			if (s != NULL)
374			printf("(%s) ", s);
375			printf("returns: %u args: (", *fsp++);
376			while (vlen-- > 0 && fsp < fend)
377			printf("%u%s", *fsp++, (vlen > 0) ? ", " : "");
378			printf(")\n");
379			}
380			printf("\n");
381			}
382
383			if (flags & DUMP_TYPE) {
384			uint32_t idx = 1, offset = cth->cth_typeoff;
385			uint32_t stroff = cth->cth_stroff;
386
387			while (offset < stroff) {
388			ctf_dump_type(cth, data, dlen, stroff, &offset, idx++);
389			}
390			printf("\n");
391			}
392
393			if (flags & DUMP_STRTAB) {
394			uint32_t offset = 0;
395			const char *str;
396
397			while (offset < cth->cth_strlen) {
398			str = ctf_off2name(cth, data, dlen, offset);
399
400			printf(" [%u] ", offset);
401			if (strcmp(str, "(anon)"))
402			offset += printf("%s\n", str);
403			else {
404			printf("\\0\n");
405			offset++;
406			}
407			}
408			printf("\n");
409			}
410
411			if (cth->cth_flags & CTF_F_COMPRESS)
412			free(data);
413
414			return 0;
415			}
416
417			void
418			ctf_dump_type(struct ctf_header cth, const char data, off_t dlen,
419			uint32_t stroff, uint32_t *offset, uint32_t idx)
420			{
421			const char p = data + offset;
422			const struct ctf_type ctt = (struct ctf_type )p;
423			const struct ctf_array *cta;
424			uint16_t *argp, i, kind, vlen, root;
425			uint32_t eob, toff;
426			uint64_t size;
427			const char name, kname;
428
429			kind = CTF_INFO_KIND(ctt->ctt_info);
430			vlen = CTF_INFO_VLEN(ctt->ctt_info);
431			root = CTF_INFO_ISROOT(ctt->ctt_info);
432			name = ctf_off2name(cth, data, dlen, ctt->ctt_name);
433
434			if (root)
435			printf(" <%u> ", idx);
436			else
437			printf(" [%u] ", idx);
438
439			if ((kname = ctf_kind2name(kind)) != NULL)
440			printf("%s %s", kname, name);
441
442			if (ctt->ctt_size <= CTF_MAX_SIZE) {
443			size = ctt->ctt_size;
444			toff = sizeof(struct ctf_stype);
445			} else {
446			size = CTF_TYPE_LSIZE(ctt);
447			toff = sizeof(struct ctf_type);
448			}
449
450			switch (kind) {
451			case CTF_K_UNKNOWN:
452			case CTF_K_FORWARD:
453			break;
454			case CTF_K_INTEGER:
455			eob = ((uint32_t )(p + toff));
456			toff += sizeof(uint32_t);
457			printf(" encoding=%s offset=%u bits=%u",
458			ctf_enc2name(CTF_INT_ENCODING(eob)), CTF_INT_OFFSET(eob),
459			CTF_INT_BITS(eob));
460			break;
461			case CTF_K_FLOAT:
462			eob = ((uint32_t )(p + toff));
463			toff += sizeof(uint32_t);
464			printf(" encoding=%s offset=%u bits=%u",
465			ctf_fpenc2name(CTF_FP_ENCODING(eob)), CTF_FP_OFFSET(eob),
466			CTF_FP_BITS(eob));
467			break;
468			case CTF_K_ARRAY:
469			cta = (struct ctf_array *)(p + toff);
470			printf(" content: %u index: %u nelems: %u\n", cta->cta_contents,
471			cta->cta_index, cta->cta_nelems);
472			toff += sizeof(struct ctf_array);
473			break;
474			case CTF_K_FUNCTION:
475			argp = (uint16_t *)(p + toff);
476			printf(" returns: %u args: (%u", ctt->ctt_type, *argp);
477			for (i = 1; i < vlen; i++) {
478			argp++;
479			printf(", %u", *argp);
480			}
481			printf(")");
482			toff += (vlen + (vlen & 1)) * sizeof(uint16_t);
483			break;
484			case CTF_K_STRUCT:
485			case CTF_K_UNION:
486			printf(" (%llu bytes)\n", size);
487
488			if (size < CTF_LSTRUCT_THRESH) {
489			for (i = 0; i < vlen; i++) {
490			struct ctf_member *ctm;
491
492			if (toff > (stroff - sizeof(*ctm)))
493			break;
494
495			ctm = (struct ctf_member *)(p + toff);
496			toff += sizeof(struct ctf_member);
497
498			printf("\t%s type=%u off=%u\n",
499			ctf_off2name(cth, data, dlen,
500			ctm->ctm_name),
501			ctm->ctm_type, ctm->ctm_offset);
502			}
503			} else {
504			for (i = 0; i < vlen; i++) {
505			struct ctf_lmember *ctlm;
506
507			if (toff > (stroff - sizeof(*ctlm)))
508			break;
509
510			ctlm = (struct ctf_lmember *)(p + toff);
511			toff += sizeof(struct ctf_lmember);
512
513			printf("\t%s type=%u off=%llu\n",
514			ctf_off2name(cth, data, dlen,
515			ctlm->ctlm_name),
516			ctlm->ctlm_type, CTF_LMEM_OFFSET(ctlm));
517			}
518			}
519			break;
520			case CTF_K_ENUM:
521			printf("\n");
522			for (i = 0; i < vlen; i++) {
523			struct ctf_enum *cte;
524
525			if (toff > (stroff - sizeof(*cte)))
526			break;
527
528			cte = (struct ctf_enum *)(p + toff);
529			toff += sizeof(struct ctf_enum);
530
531			printf("\t%s = %d\n",
532			ctf_off2name(cth, data, dlen, cte->cte_name),
533			cte->cte_value);
534			}
535			break;
536			case CTF_K_POINTER:
537			case CTF_K_TYPEDEF:
538			case CTF_K_VOLATILE:
539			case CTF_K_CONST:
540			case CTF_K_RESTRICT:
541			printf(" refers to %u", ctt->ctt_type);
542			break;
543			default:
544			errx(1, "incorrect type %u at offset %u", kind, *offset);
545			}
546
547			printf("\n");
548
549			*offset += toff;
550			}
551
552			const char *
553			ctf_kind2name(uint16_t kind)
554			{
555			static const char *kind_name[] = { NULL, "INTEGER", "FLOAT", "POINTER",
556			"ARRAY", "FUNCTION", "STRUCT", "UNION", "ENUM", "FORWARD",
557			"TYPEDEF", "VOLATILE", "CONST", "RESTRICT" };
558
559			if (kind >= nitems(kind_name))
560			return NULL;
561
562			return kind_name[kind];
563			}
564
565			const char *
566			ctf_enc2name(uint16_t enc)
567			{
568			static const char *enc_name[] = { "SIGNED", "CHAR", "SIGNED CHAR",
569			"BOOL", "SIGNED BOOL" };
570			static char invalid[7];
571
572			if (enc == CTF_INT_VARARGS)
573			return "VARARGS";
574
575			if (enc > 0 && enc <= nitems(enc_name))
576			return enc_name[enc - 1];
577
578			snprintf(invalid, sizeof(invalid), "0x%x", enc);
579			return invalid;
580			}
581
582			const char *
583			ctf_fpenc2name(uint16_t enc)
584			{
585			static const char *enc_name[] = { "SINGLE", "DOUBLE", NULL, NULL,
586			NULL, "LDOUBLE" };
587			static char invalid[7];
588
589			if (enc > 0 && enc <= nitems(enc_name) && enc_name[enc - 1] != NULL)
590			return enc_name[enc - 1];
591
592			snprintf(invalid, sizeof(invalid), "0x%x", enc);
593			return invalid;
594			}
595
596			const char *
597			ctf_off2name(struct ctf_header cth, const char data, off_t dlen,
598			uint32_t offset)
599			{
600			const char *name;
601
602			if (CTF_NAME_STID(offset) != CTF_STRTAB_0)
603			return "external";
604
605			if (CTF_NAME_OFFSET(offset) >= cth->cth_strlen)
606			return "exceeds strlab";
607
608			if (cth->cth_stroff + CTF_NAME_OFFSET(offset) >= dlen)
609			return "invalid";
610
611			name = data + cth->cth_stroff + CTF_NAME_OFFSET(offset);
612			if (*name == '\0')
613			return "(anon)";
614
615			return name;
616			}
617
618			char *
619			decompress(const char *buf, size_t size, off_t len)
620			{
621			#ifdef ZLIB
622			z_stream stream;
623			char *data;
624			int error;
625
626			data = malloc(len);
627			if (data == NULL) {
628			warn(NULL);
629			return NULL;
630			}
631
632			memset(&stream, 0, sizeof(stream));
633			stream.next_in = (void *)buf;
634			stream.avail_in = size;
635			stream.next_out = (uint8_t *)data;
636			stream.avail_out = len;
637
638			if ((error = inflateInit(&stream)) != Z_OK) {
639			warnx("zlib inflateInit failed: %s", zError(error));
640			goto exit;
641			}
642
643			if ((error = inflate(&stream, Z_FINISH)) != Z_STREAM_END) {
644			warnx("zlib inflate failed: %s", zError(error));
645			inflateEnd(&stream);
646			goto exit;
647			}
648
649			if ((error = inflateEnd(&stream)) != Z_OK) {
650			warnx("zlib inflateEnd failed: %s", zError(error));
651			goto exit;
652			}
653
654			if (stream.total_out != len) {
655			warnx("decompression failed: %llu != %llu",
656			stream.total_out, len);
657			goto exit;
658			}
659
660			return data;
661
662			exit:
663			free(data);
664			#endif /* ZLIB */
665			return NULL;
666			}
667
668			__dead void
669			usage(void)
670			{
671			fprintf(stderr, "usage: %s [-dfhlst] file ...\n",
672			getprogname());
673			exit(1);
674			}