common - zygaena/hammerhead

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/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * This program has two modes.
 *
 * In the first, or genassym, mode, it generates a header file containing
 * #define'd values for offsets and other information about requested
 * structures and arrays.  This header file can then be used by assembly
 * source files to access those structures without having to hard-code the
 * offsets.  The offsets and values in the header file are derived from the
 * CTF data in a provided object file.
 *
 * The second mode creates forthdebug macros for specified structures and
 * members from an object file.  The macros are created using the CTF data in
 * the object file.
 *
 * Forthdebug macros and offsets header files are generated using the same
 * tool for historical reasons.
 *
 * The input and output files, and their interaction with the tool are
 * shown below:
 *
 *  ---------------        -----------   cc -c -g    ------------------
 *  |#includes    | -----> |#includes| ------------> |object file with|
 *  |mode-specific|        -----------  ctfconvert   |    CTF data    |
 *  |   directives|				     ------------------
 *  ---------------					      |
 *	   |						      | obj_file
 *	   |						      V
 *	   |		   ------------			 ----------
 *	   \-------------> |directives| ---------------> |ctfstabs|
 *			   ------------  input_template  ----------
 *							      |
 *							      V
 *							---------------
 *	Mode-specific input and output formats are	|mode-specific|
 *	described in forth.c and genassym.c		|   output    |
 *							---------------
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <libgen.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "ctf_headers.h"
#include "utils.h"
#include "memory.h"
#include "ctfstabs.h"

#define	WORD_LEN	256

static int lineno;

FILE *out;
ctf_file_t *ctf;

static void
usage(void)
{
	(void) fprintf(stderr, "Usage: %s -t genassym [-m model] "
	    "[-i input_template] [-o output] obj_file\n", getpname());
	(void) fprintf(stderr, "       %s -t forth [-m model] "
	    "[-i input_template] [-o output] obj_file\n", getpname());
	exit(2);
}

/*PRINTFLIKE1*/
int
parse_warn(char *format, ...)
{
	va_list alist;

	(void) fprintf(stderr, "%s: Line %d: ", getpname(), lineno);

	va_start(alist, format);
	(void) vfprintf(stderr, format, alist);
	va_end(alist);

	(void) fprintf(stderr, "\n");

	return (-1);
}

#define	READLINE_BUF_INCR	2

/*
 * Read a line of input into a statically-allocated buffer.  If the line
 * is larger than the buffer, the buffer will be dynamically resized.
 * Subsequent calls will overwrite the buffer.
 */
static char *
readline(FILE *fp)
{
	static char *buf, *bptr;
	static int buflen;

	if (buflen == 0) {
		buf = xmalloc(READLINE_BUF_INCR);
		buflen = READLINE_BUF_INCR;
	}

	bptr = buf;
	for (;;) {
		size_t len, off;

		if (fgets(bptr, buflen - (size_t)(bptr - buf), fp) == NULL)
			return (NULL);

		len = strlen(bptr);

		if (bptr[len - 1] == '\n')
			return (buf);

		off = (size_t)((bptr + len) - buf);
		buflen += READLINE_BUF_INCR;
		buf = xrealloc(buf, buflen);
		bptr = buf + off;
	}
}

/*
 * We're only given a type name.  Even if it's a struct or a union, we
 * still only get the struct or union name.  We therefore iterate through
 * the possible prefixes, trying to find the right type.
 */
ctf_id_t
find_type(char *name)
{
	char fullname[WORD_LEN];
	ctf_id_t id;

	if ((id = ctf_lookup_by_name(ctf, name)) != CTF_ERR)
		return (id);

	(void) snprintf(fullname, WORD_LEN, "struct %s", name);
	if ((id = ctf_lookup_by_name(ctf, fullname)) != CTF_ERR)
		return (id);

	(void) snprintf(fullname, WORD_LEN, "union %s", name);
	if ((id = ctf_lookup_by_name(ctf, fullname)) != CTF_ERR)
		return (id);

	(void) snprintf(fullname, WORD_LEN, "enum %s", name);
	if ((id = ctf_lookup_by_name(ctf, fullname)) != CTF_ERR)
		return (id);

	return (CTF_ERR);
}

static int
process_ifile(FILE *tmpl, proc_ops_t *ops)
{
	char *line;
	int skipping;
	size_t len;
	int err = 0;

	for (lineno = skipping = 0; (line = readline(tmpl)) != NULL; lineno++) {
		len = strlen(line) - 1;
		line[len] = '\0';

		if (len == 0)
			skipping = 0;

		if (skipping == 1)
			continue;

		if (ops->po_line(line) < 0) {
			(void) parse_warn("Error found: skipping to the next "
			    "blank line");
			err++;
			skipping = 1;
			continue;
		}
	}

	return (err > 0 ? -1 : 0);
}

static char *
get_model(ctf_file_t *ctf)
{
	ssize_t lsz;
	ctf_id_t lid;

	/* Neither of these should fail */
	if ((lid = ctf_lookup_by_name(ctf, "long")) == CTF_ERR ||
	    (lsz = ctf_type_size(ctf, lid)) == CTF_ERR)
		die("Couldn't get size of long in object file");

	if (lsz == 8)
		return ("lp64");
	else if (lsz == 4)
		return ("ilp32");
	else
		die("Unexpected size of long: %d bytes\n", lsz);

	return (NULL);
}

int
main(int argc, char **argv)
{
	char *model = NULL, *objfile = NULL, *outfile = NULL, *tmplfile = NULL;
	proc_ops_t *ops = &ga_ops;
	FILE *tmpl;
	int ctferr, c;

	while ((c = getopt(argc, argv, "i:m:o:t:")) != EOF) {
		switch (c) {
		case 'i':
			tmplfile = optarg;
			break;
		case 'm':
			model = optarg;
			break;
		case 't':
			if (strcmp(optarg, "genassym") == 0)
				ops = &ga_ops;
			else if (strcmp(optarg, "forth") == 0)
				ops = &fth_ops;
			else
				usage();
			break;

		case 'o':
			outfile = optarg;
			break;
		default:
			usage();
		}
	}

	if (argc - optind != 1)
		usage();
	objfile = argv[optind];

	if (tmplfile == NULL || strcmp(tmplfile, "-") == 0)
		tmpl = stdin;
	else if ((tmpl = fopen(tmplfile, "r")) == NULL)
		die("Couldn't open template file %s", tmplfile);

	/*
	 * this can fail if ENOENT or if there's no CTF data in the file.
	 */
	if ((ctf = ctf_open(objfile, &ctferr)) == NULL) {
		die("Couldn't open object file %s: %s\n", objfile,
		    ctf_errmsg(ctferr));
	}

	if (model == NULL)
		model = get_model(ctf);
	else if (strcmp(model, get_model(ctf)) != 0)
		die("Model argument %s doesn't match the object file\n", model);

	if (outfile == NULL || strcmp(outfile, "-") == 0)
		out = stdout;
	else if ((out = fopen(outfile, "w")) == NULL)
		die("Couldn't open output file %s for writing", outfile);

	if ((ops->po_init != NULL && ops->po_init(model) < 0) ||
	    (process_ifile(tmpl, ops) < 0) ||
	    (ops->po_fini != NULL && ops->po_fini() < 0)) {
		(void) fclose(out);
		(void) unlink(outfile);
		return (1);
	}

	return (0);
}
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _CTFSTABS_H
#define	_CTFSTABS_H

#include <stdio.h>

#ifdef __cplusplus
extern "C" {
#endif

#include "ctf_headers.h"

/*
 * The file-reading portion of ctfstabs communicates with the type-specific
 * backends (genassym and forth) via the proc_ops_t, one of which is supplied
 * by each backend.
 */
typedef struct proc_ops {
	/*
	 * Called prior to reading the input template.  A return of -1 signals
	 * an error, and will halt processing.
	 */
	int (*po_init)(char *);

	/*
	 * Called for each line in the input file.  If an error is returned,
	 * also signalled by a return of -1, input lines will be skipped, and
	 * this method will not be called, until a blank line is encountered.
	 */
	int (*po_line)(char *);

	/*
	 * Called after all input lines have been processed.
	 */
	int (*po_fini)(void);
} proc_ops_t;

extern proc_ops_t ga_ops;
extern proc_ops_t fth_ops;

extern FILE *out;		/* the output file */
extern ctf_file_t *ctf;		/* the input object file */

extern int parse_warn(char *, ...);
extern ctf_id_t find_type(char *);

#ifdef __cplusplus
}
#endif

#endif /* _CTFSTABS_H */
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * In this mode, we generate forthdebug macros as requested by the input
 * template, the format of which is given below.
 *
 * These templates have the following elements:
 *
 * 1. Macro creation
 *
 *    Given the name of a structure, union, or enum type, a forthdebug macro
 *    is created that will dump the members of the type.  The type can be
 *    specified as a standalone structure, union, or enum, or it can be
 *    described relative to another structure or union as "type.member".
 *
 *    By default, all struct members, union members, or enum values, as
 *    appropriate, will be printed.  An alternate form allows specific members
 *    of struct or union types to be printed.  Both forms must be followed by a
 *    blank line.  In the specific-member case, an optional format specifier can
 *    be provided that will be used to dump the contents of the member.
 *    Builtins `d' and `x' can be used to dump the member in decimal or
 *    hexadecimal, respectively.  Alternatively, a custom formatter can be
 *    specified.
 *
 * 2. Model-specific sections
 *
 *    `model_start' / `model_end' pairs function as an #ifdef for the ctfstabs
 *    tool.  They take, as an argument, either `ilp32' or `lp64'.  If a 64-bit
 *    macro is being generated (if a 64-bit object file is being used), lines
 *    between `lp64' model pairs will be processed, but lines between `ilp32'
 *    pairs will be omitted.  The reverse is true for 32-bit macros.
 *
 * 3. Literal sections
 *
 *    Portions of the input template file enclosed within `forth_start' /
 *    `forth_end' pairs and between `verbatim_begin' / `verbatim_end' pairs
 *    will be copied as-is to the output file.
 *
 * 4. Comments
 *
 *    Lines beginning with backslashes are ignored.
 *
 * Example:
 *
 *    \ dump the `foo' structure
 *    foo
 *
 *    \ dump the `a' and `b' members of the `bar' structure.  dump member `b'
 *    \ in hexadecimal
 *    bar
 *	a
 *	b	x
 *
 *    \ dump the `big' member of the `baz' structure in 64-bit macros, and
 *    \ the `small' member in 32-bit macros.
 *    baz
 *    model_start lp64
 *	big
 *    model_end
 *    model_start ilp32
 *	small
 *    model_end
 *
 *    \ copy `literal 1' and `literal 2' to the output file
 *    verbatim_begin
 *    literal 1
 *    verbatim_end
 *    forth_start
 *    literal 2
 *    forth_end
 *
 * For a more complex example, see common.fdbg.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "ctf_headers.h"
#include "ctfstabs.h"
#include "forth.h"
#include "utils.h"
#include "memory.h"

char *fth_curtype;			/* name of the type being processed */
static fth_type_ops_t *fth_type_ops;	/* see forth.h */

static char *fth_model;		/* the current macro type - for model_start */
static int fth_ignoring;	/* in a non-matching model_start/end pair */
static int fth_copying;		/* in a verbatim_* or forth_* pair */

static int
fth_init(char *model)
{
	fth_model = model;

	return (0);
}

/*ARGSUSED*/
static int
fth_null_header(ctf_id_t tid)
{
	return (0);
}

/*ARGSUSED*/
static int
fth_null_members(char *memfilter, char *format)
{
	return (0);
}

static int
fth_null_trailer(void)
{
	return (0);
}

static fth_type_ops_t fth_null_ops = {
	fth_null_header,
	fth_null_members,
	fth_null_trailer
};

/*ARGSUSED2*/
static int
find_member_cb(const char *memname, ctf_id_t tid, ulong_t off, void *arg)
{
	char *memtofind = arg;

	if (strcmp(memname, memtofind) == 0)
		return (tid);

	return (0);
}

/* find the tid of a specified member */
static ctf_id_t
find_member(ctf_id_t tid, char *memname)
{
	return (ctf_member_iter(ctf, tid, find_member_cb, memname));
}

/*
 * Begin a macro.
 *
 * Once we figure out the type of the thing that we're supposed to dump (struct,
 * union, or enum), we select the proper type-specific ops-vector for dumping.
 */
static int
fth_section_init(char *fullname)
{
	ctf_id_t ltid = 0, tid;
	char *curtype, *lpart, *part, *npart;
	int lkind = 0, kind;

	curtype = xstrdup(fullname);
	lpart = NULL;
	part = strtok(fullname, ".");

	/*
	 * First figure out what sort of type we're looking at.  Life would be
	 * simple if we were only going to get type names, but it's not - we
	 * could also get `type.member'.  In that case, we need to figure out
	 * (and dump) the type of `member' instead.
	 */
	for (;;) {
		if (lpart == NULL) {
			/* First part - the struct name */
			if ((tid = find_type(part)) == CTF_ERR ||
			    (tid = ctf_type_resolve(ctf, tid)) == CTF_ERR ||
			    (kind = ctf_type_kind(ctf, tid)) == CTF_ERR) {
				free(curtype);
				return (parse_warn("Couldn't find %s: %s",
				    part, ctf_errmsg(ctf_errno(ctf))));
			}
		} else {
			/* Second (or more) part - the member name */
			if (lkind != CTF_K_STRUCT && lkind != CTF_K_UNION) {
				free(curtype);
				return (parse_warn("%s isn't a struct/union",
				    lpart));
			}

			if ((tid = find_member(ltid, part)) <= 0) {
				free(curtype);
				return (parse_warn("%s isn't a member of %s",
				    part, lpart));
			}

			if ((kind = ctf_type_kind(ctf, tid)) == CTF_ERR) {
				free(curtype);
				return (parse_warn("Can't get kind for %s",
				    part));
			}
		}

		/*
		 * Stop if there aren't any more parts.  We use `npart' here
		 * because we don't want to clobber part - we need it later.
		 */
		if ((npart = strtok(NULL, ".")) == NULL)
			break;

		lpart = part;
		ltid = tid;
		lkind = kind;

		part = npart;
	}

	/*
	 * Pick the right ops vector for dumping.
	 */
	switch (kind) {
	case CTF_K_STRUCT:
	case CTF_K_UNION:
		fth_type_ops = &fth_struct_ops;
		break;

	case CTF_K_ENUM:
		fth_type_ops = &fth_enum_ops;
		break;

	default:
		fth_type_ops = &fth_null_ops;
		free(curtype);
		return (parse_warn("%s isn't a struct, union, or enum", part));
	}

	fth_curtype = curtype;

	return (fth_type_ops->fto_header(tid));
}

static int
fth_section_add_member(char *name, char *format)
{
	if (fth_curtype == NULL)
		return (fth_section_init(name));

	if (fth_type_ops->fto_members(name, format) < 0)
		return (-1);

	return (0);
}

static int
fth_section_end(void)
{
	if (fth_curtype == NULL)
		return (0);

	if (fth_type_ops->fto_trailer() < 0)
		return (-1);

	free(fth_curtype);
	fth_curtype = NULL;

	return (0);
}

static int
fth_process_line(char *line)
{
	char *format = NULL;
	char *word, *name, *c;
	int nblank = 0;
	int n;

	if (strlen(line) == 0) {
		if (fth_section_end() < 0)
			return (-1);

		if (fth_copying == 1 || nblank++ == 1)
			(void) fprintf(out, "\n");
		return (0);
	} else
		nblank = 0;

	/* skip comments */
	if (line[0] == '\\')
		return (0);

	if (strcmp(line, "model_end") == 0) {
		fth_ignoring = 0;
		return (0);
	}

	if (fth_ignoring == 1)
		return (0);

	word = "model_start ";
	if (strncmp(line, word, strlen(word)) == 0) {
		for (c = line + strlen(word); isspace(*c); c++);
		if (strlen(c) == strlen(fth_model) &&
		    strncmp(c, fth_model, strlen(fth_model)) == 0)
			/* EMPTY - match */;
		else
			fth_ignoring = 1;
		return (0);
	}

	if (strcmp(line, "verbatim_end") == 0 ||
	    strcmp(line, "forth_end") == 0) {
		char *start = (strcmp(line, "verbatim_end") == 0 ?
		    "verbatim_begin" : "forth_start");

		if (fth_copying == 0) {
			(void) parse_warn("Found %s without matching %s",
			    line, start);
			if (fth_curtype != NULL)
				(void) fth_section_end();
			return (-1);
		}
		fth_copying = 0;
		return (0);
	}

	if (fth_copying == 1) {
		(void) fprintf(out, "%s\n", line);
		return (0);
	}

	if (strcmp(line, "verbatim_begin") == 0 ||
	    strcmp(line, "forth_start") == 0) {
		if (fth_curtype != NULL) {
			(void) parse_warn("Expected blank line between %s "
			    "macro and %s", fth_curtype, line);
			return (fth_section_end());
		}

		fth_copying = 1;
		return (0);
	}

	for (n = 1, word = strtok(line, " \t"); word != NULL;
	    word = strtok(NULL, " \t"), n++) {
		if (n == 1)
			name = word;
		else if (n == 2)
			format = word;
		else
			(void) parse_warn("Too many words");
	}

	return (fth_section_add_member(name, format));
}

static int
fth_fini(void)
{
	return (fth_section_end());
}

proc_ops_t fth_ops = {
	fth_init,
	fth_process_line,
	fth_fini
};
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _FORTH_H
#define	_FORTH_H

#ifdef __cplusplus
extern "C" {
#endif

#include "ctfstabs.h"

/*
 * The macros emitted for structs/unions and enums differ, but their
 * formatting in the input file and construction method is roughly the same.
 * If any of the ops return -1, the remainder of the type being processed is
 * skipped, and an error is signaled to the main portion of ctfstabs.
 */
typedef struct fth_type_ops {
	/*
	 * Called to start a definition.
	 */
	int (*fto_header)(ctf_id_t);

	/*
	 * When a specific-member request for a struct or union type is
	 * encountered, this op will be invoked for each requested member.
	 */
	int (*fto_members)(char *, char *);

	/*
	 * Invoked when the current open definition is to be finished.
	 */
	int (*fto_trailer)(void);
} fth_type_ops_t;

/* forth.c */
extern char *fth_curtype;

/* fth_struct.c */
extern fth_type_ops_t fth_enum_ops;
extern fth_type_ops_t fth_struct_ops;

#ifdef __cplusplus
}
#endif

#endif /* _FORTH_H */
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Used to dump enums in forth mode.
 *
 * Enums are simple - there is no member-specific mode for them.  We get
 * the header op at the start, and we save the type id for dumping later.
 * If we get the members op, we've been invoked in member-specific mode,
 * which is a syntax error for an enum.  When we ge the trailer op, we
 * dump all of the members and the trailer thus concluding the enum.
 */

#include "forth.h"

static ctf_id_t	fth_enum_curtid;
static int	fth_enum_curnmems;

static int
fth_enum_header(ctf_id_t tid)
{
	fth_enum_curtid = tid;

	(void) fprintf(out, "\n");

	return (0);
}

/*ARGSUSED*/
static int
fth_enum_members(char *memfilter, char *format)
{
	return (parse_warn("Member-specific mode cannot be used for "
	    " enums"));
}

/*ARGSUSED2*/
static int
fth_enum_cb(const char *name, int value, void *arg)
{
	(void) fprintf(out, "here ,\" %s\" %x\n", name, value);
	fth_enum_curnmems++;

	return (0);
}

static int
fth_enum_trailer(void)
{
	if (ctf_enum_iter(ctf, fth_enum_curtid, fth_enum_cb, NULL) != 0)
		return (-1);

	(void) fprintf(out, "%x c-enum .%s\n", fth_enum_curnmems, fth_curtype);

	fth_enum_curnmems = 0;

	return (0);
}

fth_type_ops_t fth_enum_ops = {
	fth_enum_header,
	fth_enum_members,
	fth_enum_trailer
};
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright 2020 OmniOS Community Edition (OmniOSce) Association.
 */

/*
 * Used to dump structures and unions in forth mode.
 *
 * structures and unions are a bit more complicated than enums.  To make things
 * just that much more interesting, we have to dump the members in reverse
 * order, which is nice.  But wait!  It gets better!  For compatibility reasons,
 * we need to dump the members in reverse-offset order, even if member-specific
 * mode was used to request the members in something other than that order.
 *
 * The header op prints the macro header and saves the type being printed.
 *
 * In member-specific mode, the member op will be invoked for each structure
 * or union member.  The member op adds the member name, format, type ID,
 * and offset to a list, sorted in reverse order by offset.
 *
 * The trailer op is called when the structure or enum is complete.  If no
 * members were specifically requested, then the trailer iterates through all
 * of the members of the structure, pretending they were.  Each member is thus
 * added, in reverse-offset order, to the list used in specific-member mode.
 * Either way, we then proceed through the list, dumping each member out with
 * fth_print_member.  Structure and union members are printed out differently,
 * depending on member type, as follows:
 *
 *  Integer:
 *	Normal integers: ' <format> <offset> <type>-field <name>
 *	  <format> defaults to ".d" for enums, ".x" for others
 *	  <offset> is the member offset, in bytes.
 *	  <type> is "byte", "short", "long", or "ext" for 8-, 16-, 32-, and
 *	    64-bit integers, respectively.
 *	  <name> is the name of the member being printed
 *
 *	Bitfields:	 ' <format> <shift> <mask> <offset> bits-field <name>
 *	  <format> defaults to ".x"
 *	  <shift> is the number of times to right-shift the masked value
 *	  <mask> use to extract the bit-field value from the read value
 *	  <offset> is the member offset, in bytes
 *	  <name> is the name of the member being printed
 *
 *  Float:		Ignored
 *
 *  Pointer:		 ' <format> <offset> ptr-field <name>
 *	  <format> defaults to .x
 *	  <offset> is in bytes
 *	  <name> is the name of the member being printed
 *
 *  Array:
 *	Arrays have a content-type-specific prefix, followed by an array
 *	suffix.  The resulting line looks like this if the array contents
 *	type is an integer, a pointer, or an enum:
 *
 *			 ' <fldc> ' <fmt> <sz> <elsz> <off> array-field <name>
 *
 *	The following is printed for array contents that are arrays:
 *
 *			 ' noop ' .x <sz> <elsz> <off> array-field <name>
 *
 *	The following is printed for array contents that are structs:
 *
 *			 ' noop ' <fmt> <sz> <elsz> <off> array-field <name>
 *
 *	  <fldc> is "c@", "w@", "l@", or "x@", depending on whether array
 *	    elements are 8, 16, 32 or 64 bits wide.
 *	  <fmt> defaults to ".x"
 *	  <sz> is the size of the array, in bytes
 *	  <elsz> is the size of the array elements
 *	  <off> is the member offset, in bytes
 *	  <name> is the nam eof the member being printed
 *
 *  Struct/Union:	 ' <format> <offset> struct-field <name>
 *	  <format> defaults to ".x"
 *	  <offset> is the member offset, in bytes
 *	  <name> is the name of the member being printed
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/list.h>

#include "ctf_headers.h"
#include "forth.h"
#include "memory.h"

static ctf_id_t	fth_str_curtid;
static list_t	fth_str_curmems;

/*
 * Node type for the member-storage list (fth_str_curmems) built by
 * fth_struct_members()
 */
typedef struct fth_str_mem {
	list_node_t	fsm_node;
	char		*fsm_memname;
	char		*fsm_format;
	ctf_id_t	fsm_tid;
	ulong_t		fsm_off;
} fth_str_mem_t;

typedef struct fth_struct_members_data {
	char		*fsmd_strname;
	char		*fsmd_memfilter;
	char		*fsmd_format;
	int		fsmd_matched;
} fth_struct_members_data_t;

static int fth_print_member(fth_str_mem_t *, int);

/* Comparison routined used to insert members into the fth_str_curmems list */
static int
fth_struct_memcmp(void *m1, void *m2)
{
	fth_str_mem_t *mem1 = m1, *mem2 = m2;

	if (mem1->fsm_off < mem2->fsm_off)
		return (1);
	else if (mem1->fsm_off > mem2->fsm_off)
		return (-1);
	else
		return (0);
}

static void
fth_slist_add(fth_str_mem_t *mem)
{
	fth_str_mem_t *l;

	for (l = list_head(&fth_str_curmems); l != NULL;
	    l = list_next(&fth_str_curmems, l)) {
		if (fth_struct_memcmp(l, mem) > 0) {
			list_insert_before(&fth_str_curmems, l, mem);
			return;
		}
	}
	list_insert_tail(&fth_str_curmems, mem);
}

static void
fth_free_str_mem(fth_str_mem_t *mem)
{
	free(mem->fsm_memname);
	if (mem->fsm_format)
		free(mem->fsm_format);
	free(mem);
}

static int
fth_struct_header(ctf_id_t tid)
{
	ssize_t sz;

	fth_str_curtid = tid;
	list_create(&fth_str_curmems, sizeof (fth_str_mem_t),
	    offsetof(fth_str_mem_t, fsm_node));

	if ((sz = ctf_type_size(ctf, fth_str_curtid)) == CTF_ERR)
		return (parse_warn("Can't get size for %s", fth_curtype));

	(void) fprintf(out, "\n");
	(void) fprintf(out, "vocabulary %s-words\n", fth_curtype);
	(void) fprintf(out, "h# %x constant %s-sz\n", sz, fth_curtype);
	(void) fprintf(out, "%x ' %s-words c-struct .%s\n", sz, fth_curtype,
	    fth_curtype);
	(void) fprintf(out, "also %s-words definitions\n\n", fth_curtype);

	return (0);
}

/* Print the array prefix for integer and pointer members */
static int
fth_print_level(uint_t bits, char *format)
{
	if ((bits & (bits - 1)) != 0 ||(bits % 8) != 0 || bits > 64) {
		return (parse_warn("Unexpected bit size %d in %s",
		    bits, fth_curtype));
	}

	(void) fprintf(out, "' %c@ ' %s", " cw l   x"[bits / 8], format);

	return (0);
}

/*
 * Return the format to be used to print the member.  If one of the builtin
 * formats "d" or "x" were specified, return ".d" or ".x", respectively.
 * Otherwise, use the user-provided format as is, or use the default if none
 * was provided.
 */
static char *
fth_convert_format(char *format, char *def)
{
	static char dot[3] = ".";

	if (format == NULL)
		return (def);
	else if (strlen(format) == 1) {
		dot[1] = *format;
		return (dot);
	} else
		return (format);
}

static int
fth_print_integer(const char *memname, ulong_t off, uint_t bits, char *format,
    int level)
{
	format = fth_convert_format(format, ".x");

	if (bits > 64) {
		return (parse_warn("%s.%s is too large (>8 bytes)",
		    fth_curtype, memname));
	}

	if (level != 0)
		return (fth_print_level(bits, format));

	if ((bits % NBBY) != 0 || (bits & (bits - 1)) != 0) {
		/* bit field */
		uint_t offset, shift, mask;

		offset = (off / 32) * 4;
		shift = 32 - ((off % 32) + bits);
		mask = ((1 << bits) - 1) << shift;

		(void) fprintf(out, "' %s %x %x %x bits-field %s\n",
		    format, shift, mask, offset, memname);

	} else {
		char *type[] = {
			NULL, "byte", "short", NULL, "long",
			NULL, NULL, NULL, "ext"
		};

		(void) fprintf(out, "' %s %lx %s-field %s\n", format, off / 8,
		    type[bits / 8], memname);
	}

	return (0);
}

static int
fth_print_pointer(const char *memname, ulong_t off, uint_t bits, char *format,
    int level)
{
	format = fth_convert_format(format, ".x");

	if (level != 0)
		return (fth_print_level(bits, format));

	(void) fprintf(out, "' %s %lx ptr-field %s\n", format, off / 8,
	    memname);

	return (0);
}

static int
fth_print_struct(char *memname, ulong_t off, char *format,
    int level)
{
	format = fth_convert_format(format, ".x");

	if (level != 0)
		(void) fprintf(out, "' noop ' %s", format);
	else {
		(void) fprintf(out, "' %s %lx struct-field %s\n", format,
		    off / 8, memname);
	}

	return (0);
}

static int
fth_print_enum(char *memname, ulong_t off, char *format,
    int level)
{
	format = fth_convert_format(format, ".d");

	if (level != 0)
		(void) fprintf(out, "' l@ ' %s", format);
	else {
		(void) fprintf(out, "' %s %lx long-field %s\n", format, off / 8,
		    memname);
	}

	return (0);
}

static int
fth_print_array(char *memname, ctf_id_t tid, ulong_t off, ssize_t sz,
    char *format, int level)
{
	if (level != 0)
		(void) fprintf(out, "' noop ' .x");
	else {
		fth_str_mem_t mem;
		ctf_arinfo_t ar;

		/*
		 * print the prefix for the array contents type, then print
		 * the array macro
		 */

		if (ctf_array_info(ctf, tid, &ar) == CTF_ERR) {
			return (parse_warn("Can't read array in %s.%s",
			    fth_curtype, memname));
		}

		mem.fsm_memname = memname;
		mem.fsm_format = format;
		mem.fsm_tid = ar.ctr_contents;
		mem.fsm_off = off;

		if (fth_print_member(&mem, level + 1) < 0)
			return (-1);

		(void) fprintf(out, " %x %x %lx array-field %s\n", sz,
		    (sz / ar.ctr_nelems), off / 8, memname);
	}

	return (0);
}

/* dump a structure or union member */
static int
fth_print_member(fth_str_mem_t *mem, int level)
{
	ctf_encoding_t e;
	ctf_id_t tid;
	int kind;
	ssize_t sz;

	if ((tid = ctf_type_resolve(ctf, mem->fsm_tid)) == CTF_ERR) {
		return (parse_warn("Can't resolve %s.%s", fth_curtype,
		    mem->fsm_memname));
	}

	if ((kind = ctf_type_kind(ctf, tid)) == CTF_ERR) {
		return (parse_warn("Can't get kind for %s.%s",
		    fth_curtype, mem->fsm_memname));
	}

	if ((sz = ctf_type_size(ctf, tid)) == CTF_ERR) {
		return (parse_warn("Can't get size for %s.%s",
		    fth_curtype, mem->fsm_memname));
	}

	switch (kind) {
	case CTF_K_INTEGER:
		if (ctf_type_encoding(ctf, tid, &e) == CTF_ERR)
			return (parse_warn("Can't get encoding for %ld", tid));

		return (fth_print_integer(mem->fsm_memname, mem->fsm_off,
		    e.cte_bits, mem->fsm_format, level));

	case CTF_K_FLOAT:
		(void) parse_warn("Ignoring floating point member %s.%s",
		    fth_curtype, mem->fsm_memname);
		return (0);

	case CTF_K_POINTER:
		return (fth_print_pointer(mem->fsm_memname, mem->fsm_off,
		    sz * 8, mem->fsm_format, level));

	case CTF_K_ARRAY:
		return (fth_print_array(mem->fsm_memname, tid, mem->fsm_off, sz,
		    mem->fsm_format, level));

	case CTF_K_STRUCT:
	case CTF_K_UNION:
		return (fth_print_struct(mem->fsm_memname, mem->fsm_off,
		    mem->fsm_format, level));

	case CTF_K_ENUM:
		return (fth_print_enum(mem->fsm_memname, mem->fsm_off,
		    mem->fsm_format, level));

	case CTF_K_FORWARD:
		return (parse_warn("Type %ld in %s.%s is undefined", tid,
		    fth_curtype, mem->fsm_memname));

	default:
		return (parse_warn("Unexpected kind %d for %s.%s", kind,
		    fth_curtype, mem->fsm_memname));
	}
}

/*
 * Add a member to list of members to be printed (fth_str_curmems).  If
 * fsmd_memfilter is non-null, only add this member if its name matches that
 * in the filter.
 */
static int
fth_struct_members_cb(const char *memname, ctf_id_t tid, ulong_t off, void *arg)
{
	fth_struct_members_data_t *fsmd = arg;
	fth_str_mem_t *mem;

	if (fsmd->fsmd_memfilter != NULL && strcmp(fsmd->fsmd_memfilter,
	    memname) != 0)
		return (0);

	fsmd->fsmd_matched = 1;

	mem = xcalloc(sizeof (fth_str_mem_t));
	mem->fsm_memname = xstrdup(memname);
	if (fsmd->fsmd_format)
		mem->fsm_format = xstrdup(fsmd->fsmd_format);
	mem->fsm_tid = tid;
	mem->fsm_off = off;

	fth_slist_add(mem);

	return (0);
}

/*
 * If memfilter is non-null, iterate through the members of this type, causing
 * every member to be added to the list.  Otherwise, use the iterator and
 * the callback to add only the specified member.
 */
static int
fth_struct_members(char *memfilter, char *format)
{
	fth_struct_members_data_t fsmd;

	fsmd.fsmd_strname = fth_curtype;
	fsmd.fsmd_memfilter = memfilter;
	fsmd.fsmd_format = format;
	fsmd.fsmd_matched = 0;

	if (ctf_member_iter(ctf, fth_str_curtid, fth_struct_members_cb,
	    &fsmd) != 0)
		return (-1);

	if (memfilter != NULL && fsmd.fsmd_matched == 0) {
		return (parse_warn("Invalid member %s.%s", fth_curtype,
		    memfilter));
	}

	return (0);
}

static int
fth_struct_trailer(void)
{
	fth_str_mem_t *mem;

	if (list_is_empty(&fth_str_curmems)) {
		if (fth_struct_members(NULL, NULL) < 0)
			return (-1);
	}

	while ((mem = list_remove_head(&fth_str_curmems)) != NULL) {
		if (fth_print_member(mem, 0) < 0)
			return (-1);

		fth_free_str_mem(mem);
	}
	list_destroy(&fth_str_curmems);

	(void) fprintf(out, "\n");
	(void) fprintf(out, "kdbg-words definitions\n");
	(void) fprintf(out, "previous\n");
	(void) fprintf(out, "\n");
	(void) fprintf(out, "\\ end %s section\n", fth_curtype);
	(void) fprintf(out, "\n");

	return (0);
}

fth_type_ops_t fth_struct_ops = {
	fth_struct_header,
	fth_struct_members,
	fth_struct_trailer
};
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * In this mode, we generate header files containg various #defines which can
 * be used to access members of various structures, and to walk through arrays.
 * The input template specifies the structures and members for whom #defines
 * are to be generated.
 *
 * The template has the following elements
 *
 * 1. Given the name of a structure or union, #defines can be generated that
 *    describe the type.  If requested, #defines that give the size and the
 *    log2 (shift) of the structure will be generated.  The latter can only
 *    be requested for structures whose size is a power of two.
 *
 *    Per-member #defines are also generated.  The value of these defines will
 *    be the offsets necessary to access the members they describe.  By
 *    default, the name of the #define will be the name of the member, in upper
 *    case, but a user-supplied version can be used instead.  If the member is
 *    an array, an extra #define will be generated that will give the increment
 *    needed to access individual array elements.  The name of the increment
 *    #define will be identical to that of the member #define, but with an
 *    "_INCR" suffix.
 *
 * 2. Literal cpp directives
 *
 *    Lines beginning with "\#" are copied directly to the output file.
 *
 * 3. Comments
 *
 *    Lines beginning with backslashes (excluding the literal cpp directives
 *    described above) are ignored.
 *
 * Example input:
 *
 *    \ Dump the `foo' structure, creating a size #define called FOO_SIZE, and a
 *    \ shift #define called FOO_SHIFT.  `foo' has one member called `mem'.
 *    foo FOO_SIZE FOO_SHIFT
 *
 *    \ Dump the `a' and `b' members of the `bar' structure.  the offset
 *    \ #defines for these members should be `FRED' and `BOB', respectively.
 *    \ Both members are of type `char'
 *    bar
 *	a	FRED
 *	b	BOB
 *
 * Example output:
 *
 *    #define FOO_SIZE	0x4
 *    #define FOO_SHIFT	0x2
 *    #define FRED	0x0
 *    #define FRED_INCR	0x1
 *    #define BOB	0x4
 */

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>

#include "ctf_headers.h"
#include "utils.h"
#include "ctfstabs.h"

static int
ga_parse_tokens(char *line, int max, char ***wret)
{
	char *c = line;
	char *word;
	int n;

	while (isspace(*c))
		c++;

	for (n = 1, word = strtok(line, " \t"); word != NULL;
	    word = strtok(NULL, " \t"), n++) {
		if (n > max)
			return (-1);

		*(wret[n - 1]) = word;
	}

	return (n - 1);
}

static int
ga_parse_common(char *line, int min, int max, char **w1, char **w2, char **w3)
{
	char **wret[3];
	int nread;

	wret[0] = w1;
	wret[1] = w2;
	wret[2] = w3;

	if ((nread = ga_parse_tokens(line, max, wret)) < min)
		return (-1);

	if (nread < 3 && wret[2] != NULL)
		*wret[2] = (char *)NULL;
	if (nread < 2 && wret[1] != NULL)
		*wret[1] = (char *)NULL;
	if (nread < 1 && wret[0] != NULL)
		*wret[0] = (char *)NULL;

	return (nread);
}

/*
 * Valid format:	typename [sizedefname [shiftdefname]]
 */
static int
ga_parse_name(char *line, char **cnp, char **szdp, char **shdp)
{
	return (ga_parse_common(line, 1, 3, cnp, szdp, shdp));
}

/*
 * Valid format:	memname [offdefname]
 */
static int
ga_parse_member(char *line, char **mnp, char **offp)
{
	return (ga_parse_common(line, 1, 2, mnp, offp, NULL));
}

/*
 * Used to begin a new structure/union block, and to print the optional size
 * and optional shift constants.
 */
static int
ga_process_name(char *line)
{
	char *curname, *sizedef, *shdef;
	ctf_id_t curtype;
	ssize_t sz, shift;

	if (ga_parse_name(line, &curname, &sizedef, &shdef) < 0)
		return (parse_warn("Couldn't parse name"));

	if ((curtype = find_type(curname)) == CTF_ERR)
		return (parse_warn("Couldn't find type %s", curname));

	if (sizedef != NULL) {
		if ((sz = ctf_type_size(ctf, curtype)) < 0) {
			return (parse_warn("Couldn't get size for type %s",
			    curname));
		} else if (sz == 0) {
			return (parse_warn("Invalid type size 0 for %s",
			    curname));
		}

		(void) fprintf(out, "#define\t%s\t0x%x\n", sizedef, sz);
	}

	if (shdef != NULL) {
		ssize_t tsz;

		for (shift = -1, tsz = sz; tsz > 0; tsz >>= 1, shift++)
			;
		if (shift < 0 || 1 << shift != sz) {
			return (parse_warn("Can't make shift #define: %s size "
			    "(%d) isn't a power of 2", curname, sz));
		}

		(void) fprintf(out, "#define\t%s\t0x%x\n", shdef, shift);
	}

	return (curtype);
}

/*
 * ga_process_member() and ga_member_cb() are used to print the offset and
 * possibly array increment values for a given structure member.  A specific
 * member is requested via ga_process_member(), and ga_member_cb() is used
 * to iterate through the members of the current structure type, looking for
 * that member.  This is not the most efficient way to do things, but the
 * lists involved are generally short.
 */
typedef struct ga_member_cb_data {
	char *gmcb_memname;
	char *gmcb_submem;
	char *gmcb_offdef;
	size_t gmcb_off;
} ga_member_cb_data_t;

static int ga_member_find(ctf_id_t, ga_member_cb_data_t *);

static int
ga_member_cb(const char *name, ctf_id_t type, ulong_t off, void *arg)
{
	ga_member_cb_data_t *md = arg;
	ctf_arinfo_t arinfo;
	char *label;

	if (strcmp(name, md->gmcb_memname) != 0)
		return (0);

	md->gmcb_off += off / 8;	/* off is in bits */

	if (md->gmcb_submem != NULL) {
		/*
		 * The user requested foo.bar.  We've found foo, and now need to
		 * recurse down to bar.
		 */
		ga_member_cb_data_t smd;

		smd.gmcb_memname = md->gmcb_submem;
		smd.gmcb_submem = NULL;
		smd.gmcb_offdef = md->gmcb_offdef;
		smd.gmcb_off = md->gmcb_off;

		return (ga_member_find(type, &smd));
	}

	if (md->gmcb_offdef == NULL) {
		int i;

		label = md->gmcb_memname;
		for (i = 0; i < strlen(label); i++)
			label[i] = toupper(label[i]);
	} else
		label = md->gmcb_offdef;

	/* offsets are in bits - we need bytes */
	(void) fprintf(out, "#define\t%s\t0x%lx\n", label,
	    (ulong_t)md->gmcb_off);

	if ((type = ctf_type_resolve(ctf, type)) == CTF_ERR)
		return (parse_warn("Couldn't resolve type %s", name));

	if (ctf_array_info(ctf, type, &arinfo) == 0) {
		ssize_t sz;

		if ((sz = ctf_type_size(ctf, arinfo.ctr_contents)) < 0)
			return (parse_warn("Couldn't get array elem size"));

		(void) fprintf(out, "#define\t%s_INCR\t0x%x\n", label, sz);
	}

	return (1);
}

static int
ga_member_find(ctf_id_t curtype, ga_member_cb_data_t *md)
{
	char *c;
	int rc;

	if ((c = strchr(md->gmcb_memname, '.')) != NULL)
		*c++ = '\0';
	md->gmcb_submem = c;

	if ((rc = ctf_member_iter(ctf, curtype, ga_member_cb, md)) == 0) {
		return (parse_warn("Couldn't find member named %s",
		    md->gmcb_memname));
	} else if (rc != 1)
		return (parse_warn("Can't parse"));

	return (1);
}

static int
ga_process_member(ctf_id_t curtype, char *line)
{
	ga_member_cb_data_t md = { 0 };

	if (ga_parse_member(line, &md.gmcb_memname, &md.gmcb_offdef) < 0)
		return (parse_warn("Couldn't parse member"));

	return (ga_member_find(curtype, &md));
}

static int
ga_process_line(char *line)
{
	static int curtype = -1;
	static int blanks = 0;

	if (strlen(line) == 0) {
		blanks++;
		return (1);
	} else if (blanks) {
		if (!isspace(line[0]))
			curtype = -1;
		blanks = 0;
	}

	if (line[0] == '\\') {
		if (line[1] == '#') {
			/* dump, verbatim, lines that begin with "\#" */
			(void) fprintf(out, "%s\n", line + 1);
		}
		return (1);

	} else if (line[0] == '#') {
		/*
		 * This is a comment of some sort; is it a line number
		 * comment?  Those look like '# 53 "filename.c"'.  GCC
		 * sometimes inserts them and removes all other vertical
		 * whitespace, so they should be treated as a "type
		 * terminator" like a blank line is.
		 */
		if (isdigit(line[2])) {
			/* line number, terminate type */
			curtype = -1;
		}
		return (1);
	}
	if (curtype == -1)
		return ((curtype = ga_process_name(line)));
	else
		return (ga_process_member(curtype, line));
}

proc_ops_t ga_ops = {
	NULL,
	ga_process_line,
	NULL
};