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Blame src/logic/slbt_exec_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--2018  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 <stdlib.h>
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#include <string.h>
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#include <slibtool/slibtool.h>
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#include "slibtool_driver_impl.h"
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#include "slibtool_errinfo_impl.h"
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#define SLBT_ARGV_SPARE_PTRS	16
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static size_t slbt_parse_comma_separated_flags(
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	const char *	str,
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	int *		argc)
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{
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	const char * ch;
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	for (ch=str; *ch; ch++)
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		if (*ch == ',')
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			(*argc)++;
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	return ch - str;
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}
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static char * slbt_source_file(char ** argv)
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{
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	char **	parg;
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	char *	ch;
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	for (parg=argv; *parg; parg++)
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		if ((ch = strrchr(*parg,'.')))
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			if ((!(strcmp(++ch,"s")))
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					|| (!(strcmp(ch,"S")))
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					|| (!(strcmp(ch,"asm")))
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					|| (!(strcmp(ch,"c")))
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					|| (!(strcmp(ch,"cc")))
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					|| (!(strcmp(ch,"cpp")))
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					|| (!(strcmp(ch,"cxx"))))
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				return *parg;
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	return 0;
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}
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static struct slbt_exec_ctx_impl * slbt_exec_ctx_alloc(
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	const struct slbt_driver_ctx *	dctx)
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{
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	struct slbt_exec_ctx_impl *	ictx;
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	size_t				size;
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	size_t				vsize;
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	int				argc;
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	char *				args;
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	char *				shadow;
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	char *				csrc;
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	char **				parg;
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	argc = 0;
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	csrc = 0;
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	/* clerical [worst-case] buffer size (guard, .libs, version) */
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	size  = strlen(".lo") + 1;
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	size += 12 * (strlen(".libs/") + 1);
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	size += 36 * (strlen(".0000") + 1);
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	/* buffer size (cargv, -Wc) */
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	for (parg=dctx->cctx->cargv; *parg; parg++, argc++)
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		if (!(strncmp("-Wc,",*parg,4)))
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			size += slbt_parse_comma_separated_flags(
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				&(*parg)[4],&argc) + 1;
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		else
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			size += strlen(*parg) + 1;
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	/* buffer size (ldirname, lbasename, lobjname, aobjname, etc.) */
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	if (dctx->cctx->output)
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		size += 9*strlen(dctx->cctx->output);
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	else if ((csrc = slbt_source_file(dctx->cctx->cargv)))
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		size += 9*strlen(csrc);
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	/* pessimistic: long dso suffix, long x.y.z version */
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	size += 9 * (16 + 16 + 16 + 16);
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	/* pessimistic argc: .libs/libfoo.so --> -L.libs -lfoo */
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	argc *= 2;
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	argc += SLBT_ARGV_SPARE_PTRS;
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	/* buffer size (.libs/%.o, pessimistic) */
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	size += argc * strlen(".libs/-L-l");
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	/* buffer size (linking) */
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	if (dctx->cctx->mode == SLBT_MODE_LINK)
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		size += strlen(dctx->cctx->settings.arprefix) + 1
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			+ strlen(dctx->cctx->settings.arsuffix) + 1
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			+ strlen(dctx->cctx->settings.dsoprefix) + 1
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			+ strlen(dctx->cctx->settings.dsoprefix) + 1
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			+ strlen(dctx->cctx->settings.dsoprefix) + 1
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			+ strlen(dctx->cctx->settings.exeprefix) + 1
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			+ strlen(dctx->cctx->settings.exeprefix) + 1
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			+ strlen(dctx->cctx->settings.impprefix) + 1
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			+ strlen(dctx->cctx->settings.impprefix) + 1;
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	/* alloc */
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	if (!(args = malloc(size)))
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		return 0;
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	if (!(shadow = malloc(size))) {
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		free(args);
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		return 0;
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	}
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	/* ictx, argv, xargv */
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	vsize  = sizeof(*ictx);
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	vsize += sizeof(char *) * (argc + 1);
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	vsize += sizeof(char *) * (argc + 1);
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	/* altv: duplicate set, -Wl,--whole-archive, -Wl,--no-whole-archive */
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	vsize += sizeof(char *) * (argc + 1) * 3;
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	if (!(ictx = calloc(1,vsize))) {
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		free(args);
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		free(shadow);
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		return 0;
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	}
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	ictx->args = args;
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	ictx->argc = argc;
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	ictx->size   = size;
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	ictx->shadow = shadow;
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	ictx->ctx.csrc  = csrc;
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	ictx->fdwrapper = (-1);
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	return ictx;
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}
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int  slbt_get_exec_ctx(
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	const struct slbt_driver_ctx *	dctx,
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	struct slbt_exec_ctx **		ectx)
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{
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	struct slbt_exec_ctx_impl *	ictx;
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	char **				parg;
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	char **				src;
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	char **				dst;
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	char *				ch;
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	char *				mark;
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	const char *			dmark;
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	char *				slash;
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	const char *			arprefix;
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	const char *			dsoprefix;
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	const char *			impprefix;
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	const char *			ref;
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	int				i;
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	/* alloc */
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	if (!(ictx = slbt_exec_ctx_alloc(dctx)))
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		return SLBT_NESTED_ERROR(dctx);
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	/* init with guard for later .lo check */
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	ch                = ictx->args + strlen(".lo");
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	ictx->ctx.argv    = ictx->vbuffer;
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	ictx->ctx.xargv   = &ictx->ctx.argv [ictx->argc + 1];
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	ictx->ctx.altv    = &ictx->ctx.xargv[ictx->argc + 1];
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	/* <compiler> */
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	ictx->ctx.compiler = dctx->cctx->cargv[0];
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	ictx->ctx.cargv    = ictx->ctx.argv;
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	/* ldirname, lbasename */
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	ref = (dctx->cctx->output)
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		? dctx->cctx->output
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		: ictx->ctx.csrc;
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	if (ref && !ictx->ctx.csrc && (mark = strrchr(ref,'/'))) {
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		if (!(strncmp(ref,"../",3)))
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			dmark = 0;
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		else if (!(strncmp(ref,"./",2)))
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			dmark = &ref[1];
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		else
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			dmark = strchr(ref,'/');
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		for (; dmark; ) {
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			if (!(strncmp(dmark,"/./",3))) {
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				dmark = strchr(&dmark[2],'/');
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			} else if (!(strncmp(dmark,"/../",4))) {
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				ictx->ctx.ldirdepth = -1;
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				dmark = 0;
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			} else {
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				for (; *dmark=='/'; )
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					dmark++;
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				ictx->ctx.ldirdepth++;
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				dmark = strchr(dmark,'/');
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			}
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		}
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		ictx->ctx.ldirname = ch;
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		strcpy(ch,ref);
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		ch += mark - ref;
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		ch += sprintf(ch,"%s","/.libs/");
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		ch++;
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		ictx->ctx.lbasename = ch;
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		ch += sprintf(ch,"%s",++mark);
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		ch++;
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	} else if (ref) {
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		ictx->ctx.ldirname = ch;
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		ch += sprintf(ch,"%s",".libs/");
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		ch++;
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		ictx->ctx.lbasename = ch;
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		mark = strrchr(ref,'/');
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		ch += sprintf(ch,"%s",mark ? ++mark : ref);
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		ch++;
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	}
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	/* lbasename suffix */
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	if (ref && (dctx->cctx->mode == SLBT_MODE_COMPILE)) {
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		if ((ch[-4] == '.') && (ch[-3] == 'l') && (ch[-2] == 'o')) {
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			ch[-3] = 'o';
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			ch[-2] = 0;
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			ch--;
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		} else if (ictx->ctx.csrc) {
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			if ((mark = strrchr(ictx->ctx.lbasename,'.'))) {
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				ch    = mark;
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				*++ch = 'o';
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				*++ch = 0;
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				ch++;
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			}
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		}
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	}
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	/* cargv, -Wc */
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	for (i=0, parg=dctx->cctx->cargv; *parg; parg++, ch++) {
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		if (!(strncmp("-Wc,",*parg,4))) {
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			strcpy(ch,&(*parg)[4]);
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			ictx->ctx.argv[i++] = ch;
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			for (; *ch; ch++)
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				if (*ch == ',') {
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					*ch++ = 0;
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					ictx->ctx.argv[i++] = ch;
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				}
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		} else {
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			ictx->ctx.argv[i++] = ch;
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			ch += sprintf(ch,"%s",*parg);
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			ch += strlen(".libs/-L-l");
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		}
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	}
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	/* placeholders for -DPIC, -fPIC, -c, -o, <output> */
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	ictx->ctx.dpic = &ictx->ctx.argv[i++];
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	ictx->ctx.fpic = &ictx->ctx.argv[i++];
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	ictx->ctx.cass = &ictx->ctx.argv[i++];
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	ictx->ctx.noundef = &ictx->ctx.argv[i++];
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	ictx->ctx.soname  = &ictx->ctx.argv[i++];
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	ictx->ctx.lsoname = &ictx->ctx.argv[i++];
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	ictx->ctx.symdefs = &ictx->ctx.argv[i++];
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	ictx->ctx.symfile = &ictx->ctx.argv[i++];
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	ictx->ctx.lout[0] = &ictx->ctx.argv[i++];
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	ictx->ctx.lout[1] = &ictx->ctx.argv[i++];
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	ictx->ctx.rpath[0] = &ictx->ctx.argv[i++];
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	ictx->ctx.rpath[1] = &ictx->ctx.argv[i++];
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	ictx->ctx.sentinel= &ictx->ctx.argv[i++];
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	slbt_reset_placeholders(&ictx->ctx);
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	/* dsoprefix */
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	if (dctx->cctx->settings.dsoprefix) {
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		ictx->dsoprefix = ch;
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		strcpy(ch,dctx->cctx->settings.dsoprefix);
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		ch += strlen(ch) + 1;
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	}
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	/* output file name */
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	if (ref && ((dctx->cctx->mode == SLBT_MODE_COMPILE))) {
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		*ictx->ctx.lout[0] = "-o";
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		*ictx->ctx.lout[1] = ch;
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		ictx->ctx.lobjname = ch;
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		ch += sprintf(ch,"%s%s",
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			ictx->ctx.ldirname,
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			ictx->ctx.lbasename)
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			+ 1;
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		ictx->ctx.aobjname = ch;
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		ch += sprintf(ch,"%s",ictx->ctx.ldirname);
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		ch -= strlen(".libs/");
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		ch += sprintf(ch,"%s",
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			ictx->ctx.lbasename)
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			+ 1;
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		ictx->ctx.ltobjname = ch;
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		strcpy(ch,ictx->ctx.aobjname);
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		if ((mark = strrchr(ch,'.')))
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			ch = mark + sprintf(mark,"%s",".lo")
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				+ 1;
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	}
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	/* linking: arfilename, lafilename, laifilename, dsobasename, dsofilename */
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	if (dctx->cctx->mode == SLBT_MODE_LINK && dctx->cctx->libname) {
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		/* arprefix, dsoprefix */
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		if (dctx->cctx->drvflags & SLBT_DRIVER_MODULE) {
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			ictx->ctx.sonameprefix = "";
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			arprefix  = "";
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			dsoprefix = "";
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			impprefix = "";
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		} else {
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			ictx->ctx.sonameprefix = ictx->dsoprefix;
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			arprefix  = dctx->cctx->settings.arprefix;
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			dsoprefix = dctx->cctx->settings.dsoprefix;
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			impprefix = dctx->cctx->settings.impprefix;
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		}
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		/* arfilename */
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		ictx->ctx.arfilename = ch;
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		ch += sprintf(ch,"%s%s%s%s",
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				ictx->ctx.ldirname,
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				arprefix,
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				dctx->cctx->libname,
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				dctx->cctx->settings.arsuffix);
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		ch++;
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		/* lafilename */
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		ictx->ctx.lafilename = ch;
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		ch += sprintf(ch,"%s%s%s.la",
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				ictx->ctx.ldirname,
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				dsoprefix,
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				dctx->cctx->libname);
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		ch++;
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		/* laifilename */
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		ictx->ctx.laifilename = ch;
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		ch += sprintf(ch,"%s%s%s.lai",
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				ictx->ctx.ldirname,
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				dsoprefix,
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				dctx->cctx->libname);
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		ch++;
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		/* dsobasename */
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		ictx->ctx.dsobasename = ch;
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		ch += sprintf(ch,"%s%s%s",
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				ictx->ctx.ldirname,
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				dsoprefix,
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				dctx->cctx->libname);
08f5f9
		ch++;
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		/* dsofilename */
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		ictx->ctx.dsofilename = ch;
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		ch += sprintf(ch,"%s%s%s%s",
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				ictx->ctx.ldirname,
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				dsoprefix,
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				dctx->cctx->libname,
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				dctx->cctx->settings.dsosuffix);
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		ch++;
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		/* deffilename */
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		ictx->ctx.deffilename = ch;
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		ch += sprintf(ch,"%s%s%s%s.def",
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				ictx->ctx.ldirname,
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				dsoprefix,
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				dctx->cctx->libname,
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				dctx->cctx->settings.dsosuffix);
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		ch++;
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		/* rpathfilename */
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		ictx->ctx.rpathfilename = ch;
2330a5
		ch += sprintf(ch,"%s%s%s%s.slibtool.rpath",
2330a5
				ictx->ctx.ldirname,
2330a5
				dsoprefix,
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				dctx->cctx->libname,
2330a5
				dctx->cctx->settings.dsosuffix);
2330a5
		ch++;
2330a5
1677f4
		/* default implib file name */
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		ictx->ctx.dimpfilename = ch;
1677f4
		ch += sprintf(ch,"%s%s%s%s",
1677f4
				ictx->ctx.ldirname,
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				impprefix,
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				dctx->cctx->libname,
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				dctx->cctx->settings.impsuffix);
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		ch++;
1677f4
1677f4
1677f4
		/* primary implib file name */
1677f4
		ictx->ctx.pimpfilename = ch;
1677f4
		ch += sprintf(ch,"%s%s%s.%d%s",
1677f4
				ictx->ctx.ldirname,
2f9f52
				impprefix,
1677f4
				dctx->cctx->libname,
1677f4
				dctx->cctx->verinfo.major,
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				dctx->cctx->settings.impsuffix);
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		ch++;
1677f4
1677f4
		/* versioned implib file name */
1677f4
		ictx->ctx.vimpfilename = ch;
1677f4
		ch += sprintf(ch,"%s%s%s.%d.%d.%d%s",
1677f4
				ictx->ctx.ldirname,
2f9f52
				impprefix,
1677f4
				dctx->cctx->libname,
1677f4
				dctx->cctx->verinfo.major,
1677f4
				dctx->cctx->verinfo.minor,
1677f4
				dctx->cctx->verinfo.revision,
c59280
				dctx->cctx->settings.impsuffix);
c59280
		ch++;
112a2b
112a2b
		/* relfilename */
112a2b
		if (dctx->cctx->release) {
112a2b
			ictx->ctx.relfilename = ch;
600957
			ch += dctx->cctx->verinfo.verinfo
08f5f9
				? sprintf(ch,"%s%s%s-%s%s.%d.%d.%d%s",
600957
					ictx->ctx.ldirname,
600957
					dsoprefix,
600957
					dctx->cctx->libname,
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					dctx->cctx->release,
08f5f9
					dctx->cctx->settings.osdsuffix,
600957
					dctx->cctx->verinfo.major,
600957
					dctx->cctx->verinfo.minor,
08f5f9
					dctx->cctx->verinfo.revision,
08f5f9
					dctx->cctx->settings.osdfussix)
600957
				: sprintf(ch,"%s%s%s-%s%s",
600957
					ictx->ctx.ldirname,
600957
					dsoprefix,
600957
					dctx->cctx->libname,
600957
					dctx->cctx->release,
600957
					dctx->cctx->settings.dsosuffix);
600957
			ch++;
600957
		}
600957
600957
		/* dsorellnkname */
600957
		if (dctx->cctx->release) {
600957
			ictx->ctx.dsorellnkname = ch;
112a2b
			ch += sprintf(ch,"%s%s%s-%s%s",
112a2b
					ictx->ctx.ldirname,
112a2b
					dsoprefix,
112a2b
					dctx->cctx->libname,
112a2b
					dctx->cctx->release,
112a2b
					dctx->cctx->settings.dsosuffix);
112a2b
			ch++;
112a2b
		}
731e44
	}
731e44
f47761
	/* linking: exefilename */
f47761
	if (dctx->cctx->mode == SLBT_MODE_LINK && !dctx->cctx->libname) {
f47761
		ictx->ctx.exefilename = ch;
f47761
f47761
		if ((slash = strrchr(dctx->cctx->output,'/'))) {
f47761
			strcpy(ch,dctx->cctx->output);
f47761
			mark = ch + (slash - dctx->cctx->output);
f47761
			sprintf(++mark,".libs/%s",++slash);
c59280
			ch += strlen(ch) + 1;
f47761
		} else
c59280
			ch += sprintf(ch,".libs/%s",dctx->cctx->output) + 1;
f47761
	}
f47761
e7ddb2
	/* argument strings shadow copy */
e7ddb2
	memcpy(ictx->shadow,ictx->args,ictx->size);
e7ddb2
d98877
	/* compile mode: argument vector shadow copy */
d98877
	if (dctx->cctx->mode == SLBT_MODE_COMPILE)
d98877
		for (src=ictx->ctx.argv, dst=ictx->ctx.xargv; *src; src++, dst++)
d98877
			*dst = *src;
d98877
d98877
	/* save the full vector's lout, mout */
d98877
	ictx->lout[0] = ictx->ctx.lout[0];
d98877
	ictx->lout[1] = ictx->ctx.lout[1];
d98877
d98877
	ictx->mout[0] = ictx->ctx.mout[0];
d98877
	ictx->mout[1] = ictx->ctx.mout[1];
d98877
d98877
	/* all done */
528799
	*ectx = &ictx->ctx;
528799
	return 0;
528799
}
528799
528799
528799
static int slbt_free_exec_ctx_impl(
528799
	struct slbt_exec_ctx_impl *	ictx,
528799
	int				status)
528799
{
9706fa
	if (ictx->fdwrapper >= 0)
9706fa
		close(ictx->fdwrapper);
5ee0d1
528799
	free(ictx->args);
e7ddb2
	free(ictx->shadow);
528799
	free (ictx);
9706fa
528799
	return status;
528799
}
528799
528799
528799
void slbt_free_exec_ctx(struct slbt_exec_ctx * ctx)
528799
{
528799
	struct slbt_exec_ctx_impl *	ictx;
528799
	uintptr_t			addr;
528799
528799
	if (ctx) {
528799
		addr = (uintptr_t)ctx - offsetof(struct slbt_exec_ctx_impl,ctx);
528799
		ictx = (struct slbt_exec_ctx_impl *)addr;
528799
		slbt_free_exec_ctx_impl(ictx,0);
528799
	}
528799
}
5aae4b
5aae4b
e7ddb2
void slbt_reset_arguments(struct slbt_exec_ctx * ectx)
e7ddb2
{
e7ddb2
	struct slbt_exec_ctx_impl *	ictx;
e7ddb2
	uintptr_t			addr;
e7ddb2
e7ddb2
	addr = (uintptr_t)ectx - offsetof(struct slbt_exec_ctx_impl,ctx);
e7ddb2
	ictx = (struct slbt_exec_ctx_impl *)addr;
e7ddb2
	memcpy(ictx->args,ictx->shadow,ictx->size);
e7ddb2
}
e7ddb2
e7ddb2
d98877
void slbt_reset_argvector(struct slbt_exec_ctx * ectx)
d98877
{
d98877
	struct slbt_exec_ctx_impl *	ictx;
d98877
	uintptr_t			addr;
d98877
	char ** 			src;
d98877
	char ** 			dst;
d98877
d98877
	addr = (uintptr_t)ectx - offsetof(struct slbt_exec_ctx_impl,ctx);
d98877
	ictx = (struct slbt_exec_ctx_impl *)addr;
d98877
d98877
	for (src=ectx->xargv, dst=ectx->argv; *src; src++, dst++)
d98877
		*dst = *src;
d98877
d98877
	*dst = 0;
d98877
d98877
	ectx->lout[0] = ictx->lout[0];
d98877
	ectx->lout[1] = ictx->lout[1];
d98877
d98877
	ectx->mout[0] = ictx->mout[0];
d98877
	ectx->mout[1] = ictx->mout[1];
d98877
}
d98877
d98877
5aae4b
void slbt_reset_placeholders(struct slbt_exec_ctx * ectx)
5aae4b
{
a40c9a
	*ectx->dpic = "-USLIBTOOL_PLACEHOLDER_DPIC";
a40c9a
	*ectx->fpic = "-USLIBTOOL_PLACEHOLDER_FPIC";
a40c9a
	*ectx->cass = "-USLIBTOOL_PLACEHOLDER_COMPILE_ASSEMBLE";
5aae4b
93b62c
	*ectx->noundef = "-USLIBTOOL_PLACEHOLDER_NO_UNDEFINED";
0f8591
	*ectx->soname  = "-USLIBTOOL_PLACEHOLDER_SONAME";
0f8591
	*ectx->lsoname = "-USLIBTOOL_PLACEHOLDER_LSONAME";
e15ee1
	*ectx->symdefs = "-USLIBTOOL_PLACEHOLDER_SYMDEF_SWITCH";
e15ee1
	*ectx->symfile = "-USLIBTOOL_PLACEHOLDER_SYMDEF_FILE";
0f8591
a40c9a
	*ectx->lout[0] = "-USLIBTOOL_PLACEHOLDER_OUTPUT_SWITCH";
a40c9a
	*ectx->lout[1] = "-USLIBTOOL_PLACEHOLDER_OUTPUT_FILE";
3e7d5b
3e7d5b
	*ectx->rpath[0] = "-USLIBTOOL_PLACEHOLDER_RPATH_SWITCH";
3e7d5b
	*ectx->rpath[1] = "-USLIBTOOL_PLACEHOLDER_RPATH_DIR";
3e7d5b
df07fb
	ectx->mout[0]  = 0;
df07fb
	ectx->mout[1]  = 0;
df07fb
b1f977
	*ectx->sentinel= 0;
5aae4b
}
2a7f1c
2a7f1c
void slbt_disable_placeholders(struct slbt_exec_ctx * ectx)
2a7f1c
{
2a7f1c
	*ectx->dpic = 0;
2a7f1c
	*ectx->fpic = 0;
2a7f1c
	*ectx->cass = 0;
2a7f1c
2a7f1c
	*ectx->noundef = 0;
2a7f1c
	*ectx->soname  = 0;
2a7f1c
	*ectx->lsoname = 0;
e15ee1
	*ectx->symdefs = 0;
e15ee1
	*ectx->symfile = 0;
2a7f1c
2a7f1c
	*ectx->lout[0] = 0;
2a7f1c
	*ectx->lout[1] = 0;
3e7d5b
3e7d5b
	*ectx->rpath[0] = 0;
3e7d5b
	*ectx->rpath[1] = 0;
3e7d5b
2a7f1c
	*ectx->sentinel= 0;
2a7f1c
}