1 files changed, 132 insertions, 0 deletions
diff --git a/src/util/slbt_create_mapfile.c b/src/util/slbt_create_mapfile.c
new file mode 100644
index 0000000..8c03920
--- /dev/null
+++ b/src/util/slbt_create_mapfile.c
@@ -0,0 +1,132 @@
+/*******************************************************************/
+/*  slibtool: a strong libtool implementation, written in C        */
+/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <time.h>
+#include <locale.h>
+#include <regex.h>
+#include <inttypes.h>
+#include <slibtool/slibtool.h>
+#include <slibtool/slibtool_output.h>
+#include "slibtool_driver_impl.h"
+#include "slibtool_dprintf_impl.h"
+#include "slibtool_errinfo_impl.h"
+#include "slibtool_pecoff_impl.h"
+#include "slibtool_ar_impl.h"
+
+/****************************************************/
+/* Generate a linker version script (aka mapfile)   */
+/* that could be passed to the host linker.         */
+/*                                                  */
+/* Since the provided symbol list is host-neautral, */
+/* prepend symbol names with an underscore whenever */
+/* necessary.                                       */
+/****************************************************/
+
+static int slbt_util_output_mapfile_impl(
+	const struct slbt_driver_ctx *  dctx,
+	const struct slbt_symlist_ctx * sctx,
+	int                             fdout)
+{
+	bool            fcoff;
+	bool            fmach;
+	const char *    dot;
+	const char *    mark;
+	const char **   symv;
+	const char **   symstrv;
+	char            strbuf[4096];
+
+	fcoff = slbt_host_objfmt_is_coff(dctx);
+	fmach = slbt_host_objfmt_is_macho(dctx);
+
+	if (fcoff) {
+		if (slbt_dprintf(fdout,"EXPORTS\n") < 0)
+			return SLBT_SYSTEM_ERROR(dctx,0);
+	} else if (fmach) {
+		if (slbt_dprintf(fdout,"# export_list, underscores prepended\n") < 0)
+			return SLBT_SYSTEM_ERROR(dctx,0);
+	} else {
+		if (slbt_dprintf(fdout,"{\n" "\t" "global:\n") < 0)
+			return SLBT_SYSTEM_ERROR(dctx,0);
+	}
+
+	symstrv = sctx->symstrv;
+
+	for (symv=symstrv; *symv; symv++) {
+		if (fcoff && slbt_is_strong_coff_symbol(*symv)) {
+			if (slbt_dprintf(fdout,"%s\n",*symv) < 0)
+				return SLBT_SYSTEM_ERROR(dctx,0);
+
+		} else if (fcoff && !strncmp(*symv,".weak.",6)) {
+			mark = &(*symv)[6];
+			dot  = strchr(mark,'.');
+
+			strncpy(strbuf,mark,dot-mark);
+			strbuf[dot-mark] = '\0';
+
+			if (slbt_dprintf(fdout,"    %s = %s\n",strbuf,++dot) < 0)
+				return SLBT_SYSTEM_ERROR(dctx,0);
+
+		} else if (fmach) {
+			if (slbt_dprintf(fdout,"_%s\n",*symv) < 0)
+				return SLBT_SYSTEM_ERROR(dctx,0);
+
+		} else {
+			if (slbt_dprintf(fdout,"\t\t%s;\n",*symv) < 0)
+				return SLBT_SYSTEM_ERROR(dctx,0);
+		}
+	}
+
+	if (!fcoff && !fmach)
+		if (slbt_dprintf(fdout,"\n\t" "local:\n" "\t\t*;\n" "};\n") < 0)
+			return SLBT_SYSTEM_ERROR(dctx,0);
+
+	return 0;
+}
+
+
+static int slbt_util_create_mapfile_impl(
+	const struct slbt_symlist_ctx *   sctx,
+	const char *                      path,
+	mode_t                            mode)
+{
+	int                             ret;
+	const struct slbt_driver_ctx *  dctx;
+	struct slbt_fd_ctx              fdctx;
+	int                             fdout;
+
+	dctx = (slbt_get_symlist_ictx(sctx))->dctx;
+
+	if (slbt_lib_get_driver_fdctx(dctx,&fdctx) < 0)
+		return SLBT_NESTED_ERROR(dctx);
+
+	if (path) {
+		if ((fdout = openat(
+				fdctx.fdcwd,path,
+				O_WRONLY|O_CREAT|O_TRUNC,
+				mode)) < 0)
+			return SLBT_SYSTEM_ERROR(dctx,0);
+	} else {
+		fdout = fdctx.fdout;
+	}
+
+	ret = slbt_util_output_mapfile_impl(
+		dctx,sctx,fdout);
+
+	if (path) {
+		close(fdout);
+	}
+
+	return ret;
+}
+
+
+int slbt_util_create_mapfile(
+	const struct slbt_symlist_ctx *   sctx,
+	const char *                      path,
+	mode_t                            mode)
+{
+	return slbt_util_create_mapfile_impl(sctx,path,mode);
+}