Blame src/driver/slbt_driver_ctx.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016  Z. Gilboa                                  */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <stdint.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define ARGV_DRIVER
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#include <slibtool/slibtool.h>
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#include "slibtool_driver_impl.h"
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#include "argv/argv.h"
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/* flavor settings */
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#define SLBT_FLAVOR_SETTINGS(flavor,arp,ars,dsop,dsos,exep,exes,impp,imps) \
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	static const struct slbt_flavor_settings flavor = {		   \
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		arp,ars,dsop,dsos,exep,exes,impp,imps}
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SLBT_FLAVOR_SETTINGS(host_flavor_default, "lib",".a", "lib",".so",    "","",     "",   "");
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SLBT_FLAVOR_SETTINGS(host_flavor_midipix, "lib",".a", "lib",".so",    "","",     "lib",".lib.a");
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SLBT_FLAVOR_SETTINGS(host_flavor_mingw,   "lib",".a", "lib",".dll",   "",".exe", "lib",".dll.a");
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SLBT_FLAVOR_SETTINGS(host_flavor_cygwin,  "lib",".a", "lib",".dll",   "",".exe", "lib",".dll.a");
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SLBT_FLAVOR_SETTINGS(host_flavor_darwin,  "lib",".a", "lib",".dylib", "","",     "",   "");
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/* annotation strings */
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static const char cfgexplicit[] = "command-line argument";
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static const char cfghost[]     = "derived from <host>";
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static const char cfgtarget[]   = "derived from <target>";
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static const char cfgcompiler[] = "derived from <compiler>";
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static const char cfgmachine[]  = "native (derived from -dumpmachine)";
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static const char cfgnative[]   = "native";
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struct slbt_split_vector {
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	char **		targv;
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	char **		cargv;
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};
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struct slbt_driver_ctx_alloc {
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	struct argv_meta *		meta;
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	struct slbt_driver_ctx_impl	ctx;
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	uint64_t			guard;
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	const char *			units[];
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};
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static uint32_t slbt_argv_flags(uint32_t flags)
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{
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	uint32_t ret = 0;
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	if (flags & SLBT_DRIVER_VERBOSITY_NONE)
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		ret |= ARGV_VERBOSITY_NONE;
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	if (flags & SLBT_DRIVER_VERBOSITY_ERRORS)
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		ret |= ARGV_VERBOSITY_ERRORS;
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	if (flags & SLBT_DRIVER_VERBOSITY_STATUS)
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		ret |= ARGV_VERBOSITY_STATUS;
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	return ret;
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}
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static int slbt_driver_usage(
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	const char *			program,
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	const char *			arg,
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	const struct argv_option *	options,
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	struct argv_meta *		meta)
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{
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	char header[512];
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	snprintf(header,sizeof(header),
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		"Usage: %s [options] <file>...\n" "Options:\n",
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		program);
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	argv_usage(stdout,header,options,arg);
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	argv_free(meta);
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	return SLBT_USAGE;
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}
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static struct slbt_driver_ctx_impl * slbt_driver_ctx_alloc(
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	struct argv_meta *		meta,
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	const struct slbt_common_ctx *	cctx,
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	size_t				nunits)
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{
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	struct slbt_driver_ctx_alloc *	ictx;
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	size_t				size;
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	struct argv_entry *		entry;
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	const char **			units;
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	size =  sizeof(struct slbt_driver_ctx_alloc);
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	size += (nunits+1)*sizeof(const char *);
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	if (!(ictx = calloc(1,size)))
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		return 0;
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	if (cctx)
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		memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));
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	for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
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		if (!entry->fopt)
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			*units++ = entry->arg;
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	ictx->meta = meta;
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	ictx->ctx.ctx.units = ictx->units;
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	return &ictx->ctx;
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}
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static int slbt_get_driver_ctx_fail(struct argv_meta * meta)
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{
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	argv_free(meta);
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	return -1;
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}
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static int slbt_split_argv(
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	char **				argv,
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	uint32_t			flags,
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	struct slbt_split_vector *	sargv)
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{
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	int				i;
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	int				argc;
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	const char *			program;
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	char *				compiler;
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	char **				targv;
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	char **				cargv;
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	struct argv_meta *		meta;
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	struct argv_entry *		entry;
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	struct argv_entry *		mode;
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	struct argv_entry *		config;
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	const struct argv_option *	option;
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	const struct argv_option *	options = slbt_default_options;
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	struct argv_ctx			ctx = {ARGV_VERBOSITY_NONE,
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						ARGV_MODE_SCAN,
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						0,0,0,0,0,0,0};
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	program = argv_program_name(argv[0]);
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	/* missing arguments? */
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	if (!argv[1] && (flags & SLBT_DRIVER_VERBOSITY_USAGE))
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		return slbt_driver_usage(program,0,options,0);
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	/* initial argv scan: ... --mode=xxx ... <compiler> ... */
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	argv_scan(argv,options,&ctx,0);
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	/* invalid slibtool arguments? */
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	if (ctx.erridx && !ctx.unitidx) {
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		if (flags & SLBT_DRIVER_VERBOSITY_ERRORS)
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			argv_get(
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				argv,options,
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				slbt_argv_flags(flags));
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		return -1;
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	}
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	/* missing compiler? */
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	if (!ctx.unitidx) {
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		if (flags & SLBT_DRIVER_VERBOSITY_ERRORS)
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			fprintf(stderr,
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				"%s: error: <compiler> is missing.\n",
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				program);
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		return -1;
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	}
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	/* obtain slibtool's own arguments */
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	compiler = argv[ctx.unitidx];
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	argv[ctx.unitidx] = 0;
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	meta = argv_get(argv,options,ARGV_VERBOSITY_NONE);
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	argv[ctx.unitidx] = compiler;
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	/* missing both --mode and --config? */
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	for (mode=0, entry=meta->entries; entry->fopt; entry++)
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		if (entry->tag == TAG_MODE)
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			mode = entry;
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		else if (entry->tag == TAG_CONFIG)
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			config = entry;
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	argv_free(meta);
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	if (!mode && !config) {
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		fprintf(stderr,
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			"%s: error: --mode must be specified.\n",
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			program);
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		return -1;
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	}
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	/* allocate split vectors */
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	for (argc=0, targv=argv; *targv; targv++)
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		argc++;
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	if ((sargv->targv = calloc(2*(argc+1),sizeof(char *))))
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		sargv->cargv = sargv->targv + argc + 1;
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	else
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		return -1;
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	/* split vectors: slibtool's own options */
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	for (i=0; i
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		sargv->targv[i] = argv[i];
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	/* split vectors: legacy mixture */
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	options = option_from_tag(
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			slbt_default_options,
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			TAG_OUTPUT);
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	targv = sargv->targv + i;
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	cargv = sargv->cargv;
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	for (; i
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		if (argv[i][0] != '-')
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			*cargv++ = argv[i];
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		else if (argv[i][1] == 'o') {
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			*targv++ = argv[i];
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			if (argv[i][2] == '\0')
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				*targv++ = argv[++i];
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		}
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		else if ((argv[i][1] == 'W')  && (argv[i][2] == 'c'))
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			*cargv++ = argv[i];
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		else if (!(strcmp("Xcompiler",&argv[i][1])))
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			*cargv++ = argv[++i];
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		else if (!(strncmp("-target=",&argv[i][1],strlen("-target="))))
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			*targv++ = argv[i];
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		else if (!(strcmp("-target",&argv[i][1]))) {
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			*targv++ = argv[i++];
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			*targv++ = argv[i];
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		} else if (!(strcmp("rpath",&argv[i][1]))) {
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			*targv++ = argv[i++];
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			*targv++ = argv[i];
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		} else if (!(strcmp("version-info",&argv[i][1]))) {
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			*targv++ = argv[i++];
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			*targv++ = argv[i];
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		} else {
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			for (option=options; option->long_name; option++)
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				if (!(strcmp(option->long_name,&argv[i][1])))
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					break;
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			if (option->long_name)
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				*targv++ = argv[i];
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			else
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				*cargv++ = argv[i];
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		}
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	}
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	return 0;
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}
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static int slbt_init_host_params(
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	const struct slbt_common_ctx *	cctx,
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	struct slbt_host_strs *		drvhost,
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	struct slbt_host_params *	host,
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	struct slbt_host_params *	cfgmeta)
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{
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	size_t		toollen;
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	char *		slash;
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	const char *	machine;
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	bool		ftarget       = false;
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	bool		fhost         = false;
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	bool		fcompiler     = false;
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	bool		fnative       = false;
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	/* host */
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	if (host->host) {
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		cfgmeta->host = cfgexplicit;
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		fhost         = true;
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	} else if (cctx->target) {
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		host->host    = cctx->target;
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		cfgmeta->host = cfgtarget;
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		ftarget       = true;
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	} else if (strrchr(cctx->cargv[0],'-')) {
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		if (!(drvhost->host = strdup(cctx->cargv[0])))
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			return -1;
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		slash         = strrchr(drvhost->host,'-');
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		*slash        = '\0';
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		host->host    = drvhost->host;
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		cfgmeta->host = cfgcompiler;
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		fcompiler     = true;
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	} else {
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		host->host    = SLBT_MACHINE;
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		cfgmeta->host = cfgmachine;
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		fnative       = true;
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	}
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	/* flavor */
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	if (host->flavor) {
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		cfgmeta->flavor = cfgexplicit;
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	} else {
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		if (fhost) {
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			machine         = host->host;
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			cfgmeta->flavor = cfghost;
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		} else if (ftarget) {
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			machine         = cctx->target;
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			cfgmeta->flavor = cfgtarget;
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		} else if (fcompiler) {
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			machine         = drvhost->host;
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			cfgmeta->flavor = cfgcompiler;
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		} else {
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			machine         = SLBT_MACHINE;
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			cfgmeta->flavor = cfgmachine;
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		}
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		slash = strrchr(machine,'-');
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		cfgmeta->flavor = cfghost;
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		if ((slash && !strcmp(slash,"-bsd")) || strstr(machine,"-bsd-"))
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			host->flavor = "bsd";
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		else if ((slash && !strcmp(slash,"-cygwin")) || strstr(machine,"-cygwin-"))
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			host->flavor = "cygwin";
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		else if ((slash && !strcmp(slash,"-darwin")) || strstr(machine,"-darwin-"))
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			host->flavor = "darwin";
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		else if ((slash && !strcmp(slash,"-linux")) || strstr(machine,"-linux-"))
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			host->flavor = "linux";
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		else if ((slash && !strcmp(slash,"-midipix")) || strstr(machine,"-midipix-"))
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			host->flavor = "midipix";
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		else if ((slash && !strcmp(slash,"-mingw")) || strstr(machine,"-mingw-"))
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			host->flavor = "mingw";
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		else if ((slash && !strcmp(slash,"-mingw32")) || strstr(machine,"-mingw32-"))
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			host->flavor = "mingw";
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		else if ((slash && !strcmp(slash,"-mingw64")) || strstr(machine,"-mingw64-"))
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			host->flavor = "mingw";
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		else {
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			host->flavor   = "default";
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			cfgmeta->flavor = "fallback, unverified";
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		}
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	}
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	/* toollen */
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	toollen =  fnative ? 0 : strlen(host->host);
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	toollen += strlen("-utility-name");
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	/* ar */
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	if (host->ar)
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		cfgmeta->ar = cfgexplicit;
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	else {
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		if (!(drvhost->ar = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->ar,"ar");
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			cfgmeta->ar = cfgnative;
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		} else {
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			sprintf(drvhost->ar,"%s-ar",host->host);
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			cfgmeta->ar = cfghost;
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		}
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		host->ar = drvhost->ar;
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	}
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	/* ranlib */
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	if (host->ranlib)
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		cfgmeta->ranlib = cfgexplicit;
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	else {
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		if (!(drvhost->ranlib = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->ranlib,"ranlib");
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			cfgmeta->ranlib = cfgnative;
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		} else {
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			sprintf(drvhost->ranlib,"%s-ranlib",host->host);
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			cfgmeta->ranlib = cfghost;
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		}
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		host->ranlib = drvhost->ranlib;
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	}
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	/* dlltool */
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	if (host->dlltool)
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		cfgmeta->dlltool = cfgexplicit;
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	else if (strcmp(host->flavor,"cygwin")
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			&& strcmp(host->flavor,"midipix")
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			&& strcmp(host->flavor,"mingw")) {
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		host->dlltool = "";
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		cfgmeta->dlltool = "not applicable";
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	} else {
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		if (!(drvhost->dlltool = calloc(1,toollen)))
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			return -1;
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46ea99
		if (fnative) {
46ea99
			strcpy(drvhost->dlltool,"dlltool");
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			cfgmeta->dlltool = cfgnative;
46ea99
		} else {
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			sprintf(drvhost->dlltool,"%s-dlltool",host->host);
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			cfgmeta->dlltool = cfghost;
46ea99
		}
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		host->dlltool = drvhost->dlltool;
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	}
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	return 0;
46ea99
}
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static void slbt_init_flavor_settings(struct slbt_common_ctx * cctx)
a66d34
{
a66d34
	const struct slbt_flavor_settings * settings;
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	if (!strcmp(cctx->host.flavor,"midipix"))
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		settings = &host_flavor_midipix;
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	else if (!strcmp(cctx->host.flavor,"mingw"))
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		settings = &host_flavor_mingw;
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	else if (!strcmp(cctx->host.flavor,"cygwin"))
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		settings = &host_flavor_cygwin;
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	else if (!strcmp(cctx->host.flavor,"darwin"))
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		settings = &host_flavor_darwin;
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	else
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		settings = &host_flavor_default;
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a66d34
	memcpy(&cctx->settings,settings,sizeof(*settings));
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}
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static int slbt_init_version_info(
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	struct slbt_driver_ctx_impl *	ictx,
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	struct slbt_version_info *	verinfo)
5a9161
{
5a9161
	int	current;
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	int	revision;
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	int	age;
5a9161
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	sscanf(verinfo->verinfo,"%d:%d:%d",
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		&current,&revision,&age;;
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5a9161
	if (current < age) {
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		if (ictx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)
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			fprintf(stderr,
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				"%s: error: invalid version info: "
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				"<current> may not be smaller than <age>.\n",
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				argv_program_name(ictx->cctx.targv[0]));
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		return -1;
5a9161
	}
5a9161
5a9161
	verinfo->major    = current - age;
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	verinfo->minor    = age;
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	verinfo->revision = revision;
5a9161
5a9161
	return 0;
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}
5a9161
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int slbt_get_driver_ctx(
9ca8c4
	char **				argv,
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	char **				envp,
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	uint32_t			flags,
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	struct slbt_driver_ctx **	pctx)
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{
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	struct slbt_split_vector	sargv;
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	struct slbt_driver_ctx_impl *	ctx;
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	struct slbt_common_ctx		cctx;
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	const struct argv_option *	options;
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	struct argv_meta *		meta;
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	struct argv_entry *		entry;
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	size_t				nunits;
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	const char *			program;
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9ca8c4
	options = slbt_default_options;
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56cab3
	if (slbt_split_argv(argv,flags,&sargv))
56cab3
		return -1;
56cab3
56cab3
	if (!(meta = argv_get(sargv.targv,options,slbt_argv_flags(flags))))
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		return -1;
9ca8c4
9ca8c4
	nunits	= 0;
9ca8c4
	program = argv_program_name(argv[0]);
9ca8c4
	memset(&cctx,0,sizeof(cctx));
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341c87
	/* shared and static objects: enable by default, disable by ~switch */
341c87
	cctx.drvflags = SLBT_DRIVER_SHARED | SLBT_DRIVER_STATIC;
341c87
9ca8c4
	/* get options, count units */
9ca8c4
	for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
9ca8c4
		if (entry->fopt) {
9ca8c4
			switch (entry->tag) {
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				case TAG_HELP:
949677
				case TAG_HELP_ALL:
9ca8c4
					if (flags & SLBT_DRIVER_VERBOSITY_USAGE)
9ca8c4
						return slbt_driver_usage(program,entry->arg,options,meta);
9ca8c4
9ca8c4
				case TAG_VERSION:
9ca8c4
					cctx.drvflags |= SLBT_DRIVER_VERSION;
9ca8c4
					break;
667ce2
667ce2
				case TAG_MODE:
667ce2
					if (!strcmp("clean",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_CLEAN;
667ce2
667ce2
					else if (!strcmp("compile",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_COMPILE;
667ce2
667ce2
					else if (!strcmp("execute",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_EXECUTE;
667ce2
667ce2
					else if (!strcmp("finish",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_FINISH;
667ce2
667ce2
					else if (!strcmp("install",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_INSTALL;
667ce2
667ce2
					else if (!strcmp("link",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_LINK;
667ce2
667ce2
					else if (!strcmp("uninstall",entry->arg))
667ce2
						cctx.mode = SLBT_MODE_UNINSTALL;
667ce2
					break;
071d14
071d14
				case TAG_DRY_RUN:
071d14
					cctx.drvflags |= SLBT_DRIVER_DRY_RUN;
071d14
					break;
53f4ec
53f4ec
				case TAG_TAG:
53f4ec
					if (!strcmp("CC",entry->arg))
53f4ec
						cctx.tag = SLBT_TAG_CC;
53f4ec
53f4ec
					else if (!strcmp("CXX",entry->arg))
53f4ec
						cctx.tag = SLBT_TAG_CXX;
53f4ec
					break;
173b54
173b54
				case TAG_CONFIG:
173b54
					cctx.drvflags |= SLBT_DRIVER_CONFIG;
173b54
					break;
173b54
fea1b8
				case TAG_DEBUG:
fea1b8
					cctx.drvflags |= SLBT_DRIVER_DEBUG;
fea1b8
					break;
d03fbc
d03fbc
				case TAG_FEATURES:
d03fbc
					cctx.drvflags |= SLBT_DRIVER_FEATURES;
d03fbc
					break;
6376f0
6376f0
				case TAG_WARNINGS:
6376f0
					if (!strcmp("all",entry->arg))
6376f0
						cctx.tag = SLBT_WARNING_LEVEL_ALL;
6376f0
6376f0
					else if (!strcmp("error",entry->arg))
6376f0
						cctx.tag = SLBT_WARNING_LEVEL_ERROR;
6376f0
6376f0
					else if (!strcmp("none",entry->arg))
6376f0
						cctx.tag = SLBT_WARNING_LEVEL_NONE;
6376f0
					break;
40fabb
40fabb
				case TAG_DEPS:
40fabb
					cctx.drvflags |= SLBT_DRIVER_DEPS;
40fabb
					break;
40fabb
398419
				case TAG_SILENT:
398419
					cctx.drvflags |= SLBT_DRIVER_SILENT;
398419
					break;
25956b
25956b
				case TAG_VERBOSE:
25956b
					cctx.drvflags |= SLBT_DRIVER_VERBOSE;
25956b
					break;
b83b64
db67ad
				case TAG_HOST:
db67ad
					cctx.host.host = entry->arg;
db67ad
					break;
db67ad
db67ad
				case TAG_FLAVOR:
db67ad
					cctx.host.flavor = entry->arg;
db67ad
					break;
db67ad
db67ad
				case TAG_AR:
db67ad
					cctx.host.ar = entry->arg;
db67ad
					break;
db67ad
db67ad
				case TAG_RANLIB:
db67ad
					cctx.host.ranlib = entry->arg;
db67ad
					break;
db67ad
db67ad
				case TAG_DLLTOOL:
db67ad
					cctx.host.dlltool = entry->arg;
db67ad
					break;
db67ad
b83b64
				case TAG_OUTPUT:
b83b64
					cctx.output = entry->arg;
b83b64
					break;
4f1b20
9c664d
				case TAG_RPATH:
9c664d
					cctx.rpath = entry->arg;
9c664d
					break;
9c664d
5a9161
				case TAG_VERSION_INFO:
5a9161
					cctx.verinfo.verinfo = entry->arg;
5a9161
					break;
5a9161
4df790
				case TAG_TARGET:
4df790
					cctx.target = entry->arg;
4df790
					break;
4df790
4f1b20
				case TAG_PREFER_PIC:
4f1b20
					cctx.drvflags |= SLBT_DRIVER_PRO_PIC;
4f1b20
					break;
4f1b20
4f1b20
				case TAG_PREFER_NON_PIC:
4f1b20
					cctx.drvflags |= SLBT_DRIVER_ANTI_PIC;
4f1b20
					break;
9c25c7
9c25c7
				case TAG_SHARED:
341c87
					cctx.drvflags &= ~(uint64_t)SLBT_DRIVER_STATIC;
9c25c7
					break;
9c25c7
9c25c7
				case TAG_STATIC:
341c87
					cctx.drvflags &= ~(uint64_t)SLBT_DRIVER_SHARED;
9c25c7
					break;
9ca8c4
			}
9ca8c4
		} else
9ca8c4
			nunits++;
9ca8c4
	}
9ca8c4
c778cc
	/* driver context */
9ca8c4
	if (!(ctx = slbt_driver_ctx_alloc(meta,&cctx,nunits)))
9ca8c4
		return slbt_get_driver_ctx_fail(meta);
9ca8c4
9ca8c4
	ctx->ctx.program	= program;
9ca8c4
	ctx->ctx.cctx		= &ctx->cctx;
56cab3
	ctx->targv		= sargv.targv;
56cab3
	ctx->cargv		= sargv.cargv;
9ca8c4
a288c4
	ctx->cctx.targv		= sargv.targv;
a288c4
	ctx->cctx.cargv		= sargv.cargv;
a288c4
46ea99
	/* host params */
46ea99
	if ((cctx.drvflags & SLBT_DRIVER_HEURISTICS)
24efc6
			|| (cctx.drvflags & SLBT_DRIVER_CONFIG)
a66d34
			|| (cctx.mode != SLBT_MODE_COMPILE)) {
46ea99
		if (slbt_init_host_params(
46ea99
				&ctx->cctx,
46ea99
				&ctx->host,
46ea99
				&ctx->cctx.host,
46ea99
				&ctx->cctx.cfgmeta)) {
46ea99
			slbt_free_driver_ctx(&ctx->ctx);
46ea99
			return -1;
a66d34
		} else
a66d34
			slbt_init_flavor_settings(&ctx->cctx);
a66d34
	}
46ea99
5a9161
	/* version info */
5a9161
	if (ctx->cctx.verinfo.verinfo)
5a9161
		if (slbt_init_version_info(ctx,&ctx->cctx.verinfo)) {
5a9161
			slbt_free_driver_ctx(&ctx->ctx);
5a9161
			return -1;
5a9161
		}
5a9161
9ca8c4
	*pctx = &ctx->ctx;
9ca8c4
	return SLBT_OK;
9ca8c4
}
9ca8c4
9ca8c4
int slbt_create_driver_ctx(
9ca8c4
	const struct slbt_common_ctx *	cctx,
9ca8c4
	struct slbt_driver_ctx **	pctx)
9ca8c4
{
9ca8c4
	struct argv_meta *		meta;
9ca8c4
	struct slbt_driver_ctx_impl *	ctx;
9ca8c4
	char *				argv[] = {"slibtool_driver",0};
9ca8c4
9ca8c4
	if (!(meta = argv_get(argv,slbt_default_options,0)))
9ca8c4
		return -1;
9ca8c4
9ca8c4
	if (!(ctx = slbt_driver_ctx_alloc(meta,cctx,0)))
9ca8c4
		return slbt_get_driver_ctx_fail(0);
9ca8c4
9ca8c4
	ctx->ctx.cctx = &ctx->cctx;
9ca8c4
	memcpy(&ctx->cctx,cctx,sizeof(*cctx));
9ca8c4
	*pctx = &ctx->ctx;
9ca8c4
	return SLBT_OK;
9ca8c4
}
9ca8c4
9ca8c4
static void slbt_free_driver_ctx_impl(struct slbt_driver_ctx_alloc * ictx)
9ca8c4
{
56cab3
	if (ictx->ctx.targv)
56cab3
		free(ictx->ctx.targv);
56cab3
46ea99
	if (ictx->ctx.host.host)
46ea99
		free(ictx->ctx.host.host);
46ea99
46ea99
	if (ictx->ctx.host.flavor)
46ea99
		free(ictx->ctx.host.flavor);
46ea99
46ea99
	if (ictx->ctx.host.ar)
46ea99
		free(ictx->ctx.host.ar);
46ea99
46ea99
	if (ictx->ctx.host.ranlib)
46ea99
		free(ictx->ctx.host.ranlib);
46ea99
46ea99
	if (ictx->ctx.host.dlltool)
46ea99
		free(ictx->ctx.host.dlltool);
46ea99
9ca8c4
	argv_free(ictx->meta);
9ca8c4
	free(ictx);
9ca8c4
}
9ca8c4
9ca8c4
void slbt_free_driver_ctx(struct slbt_driver_ctx * ctx)
9ca8c4
{
9ca8c4
	struct slbt_driver_ctx_alloc *	ictx;
9ca8c4
	uintptr_t			addr;
9ca8c4
9ca8c4
	if (ctx) {
9ca8c4
		addr = (uintptr_t)ctx - offsetof(struct slbt_driver_ctx_alloc,ctx);
9ca8c4
		addr = addr - offsetof(struct slbt_driver_ctx_impl,ctx);
9ca8c4
		ictx = (struct slbt_driver_ctx_alloc *)addr;
9ca8c4
		slbt_free_driver_ctx_impl(ictx);
9ca8c4
	}
9ca8c4
}