Blame src/util/slbt_create_mapfile.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <time.h>
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#include <locale.h>
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#include <regex.h>
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#include <inttypes.h>
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#include <slibtool/slibtool.h>
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#include <slibtool/slibtool_output.h>
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#include "slibtool_driver_impl.h"
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#include "slibtool_dprintf_impl.h"
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#include "slibtool_errinfo_impl.h"
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#include "slibtool_ar_impl.h"
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/****************************************************/
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/* Generate a linker version script (aka mapfile)   */
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/* that could be passed to the host linker.         */
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/*                                                  */
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/* Since the provided symbol list is host-neautral, */
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/* prepend symbol names with an underscore whenever */
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/* necessary.                                       */
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/****************************************************/
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static int slbt_is_strong_coff_symbol(const char * sym)
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{
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	return strncmp(sym,"__imp_",6) && strncmp(sym,".weak.",6);
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}
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static int slbt_util_output_mapfile_impl(
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	const struct slbt_driver_ctx *  dctx,
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	const struct slbt_symlist_ctx * sctx,
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	int                             fdout)
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{
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	bool            fcoff;
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	bool            fmach;
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	const char **   symv;
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	const char **   symstrv;
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	fcoff = slbt_host_objfmt_is_coff(dctx);
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	fmach = slbt_host_objfmt_is_macho(dctx);
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	if (fcoff) {
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		if (slbt_dprintf(fdout,"EXPORTS\n") < 0)
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			return SLBT_SYSTEM_ERROR(dctx,0);
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	} else if (fmach) {
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		if (slbt_dprintf(fdout,"# export_list, underscores prepended\n") < 0)
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			return SLBT_SYSTEM_ERROR(dctx,0);
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	} else {
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		if (slbt_dprintf(fdout,"{\n" "\t" "global:\n") < 0)
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			return SLBT_SYSTEM_ERROR(dctx,0);
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	}
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	symstrv = sctx->symstrv;
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	for (symv=symstrv; *symv; symv++) {
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		if (!fcoff || slbt_is_strong_coff_symbol(*symv)) {
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			if (fcoff) {
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				if (slbt_dprintf(fdout,"%s\n",*symv) < 0)
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					return SLBT_SYSTEM_ERROR(dctx,0);
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			} else if (fmach) {
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				if (slbt_dprintf(fdout,"_%s\n",*symv) < 0)
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					return SLBT_SYSTEM_ERROR(dctx,0);
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			} else {
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				if (slbt_dprintf(fdout,"\t\t%s;\n",*symv) < 0)
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					return SLBT_SYSTEM_ERROR(dctx,0);
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			}
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		}
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	}
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	if (!fcoff && !fmach)
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		if (slbt_dprintf(fdout,"\n\t" "local:\n" "\t\t*;\n" "};\n") < 0)
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			return SLBT_SYSTEM_ERROR(dctx,0);
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	return 0;
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}
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static int slbt_util_create_mapfile_impl(
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	const struct slbt_symlist_ctx *   sctx,
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	const char *                      path,
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	mode_t                            mode)
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{
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	int                             ret;
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	const struct slbt_driver_ctx *  dctx;
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	struct slbt_fd_ctx              fdctx;
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	int                             fdout;
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	dctx = (slbt_get_symlist_ictx(sctx))->dctx;
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	if (slbt_lib_get_driver_fdctx(dctx,&fdctx) < 0)
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		return SLBT_NESTED_ERROR(dctx);
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	if (path) {
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		if ((fdout = openat(
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				fdctx.fdcwd,path,
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				O_WRONLY|O_CREAT|O_TRUNC,
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				mode)) < 0)
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			return SLBT_SYSTEM_ERROR(dctx,0);
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	} else {
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		fdout = fdctx.fdout;
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	}
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	ret = slbt_util_output_mapfile_impl(
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		dctx,sctx,fdout);
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	if (path) {
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		close(fdout);
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	}
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	return ret;
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}
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int slbt_util_create_mapfile(
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	const struct slbt_symlist_ctx *   sctx,
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	const char *                      path,
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	mode_t                            mode)
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{
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	return slbt_util_create_mapfile_impl(sctx,path,mode);
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}