From f7b3fdbb145ce292ae9c468c63b6d32c1a75ffde Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Tue, 20 Feb 2024 04:50:19 +0000
Subject: utility api's: added slbt_util_create_mapfile().
---
src/internal/slibtool_driver_impl.h | 12 ++++
src/util/slbt_create_mapfile.c | 127 ++++++++++++++++++++++++++++++++++++
2 files changed, 139 insertions(+)
create mode 100644 src/util/slbt_create_mapfile.c
(limited to 'src')
diff --git a/src/internal/slibtool_driver_impl.h b/src/internal/slibtool_driver_impl.h
index 8420532..5bc421d 100644
--- a/src/internal/slibtool_driver_impl.h
+++ b/src/internal/slibtool_driver_impl.h
@@ -320,6 +320,18 @@ static inline struct slbt_driver_ctx_impl * slbt_get_driver_ictx(const struct sl
return 0;
}
+static inline struct slbt_symlist_ctx_impl * slbt_get_symlist_ictx(const struct slbt_symlist_ctx * sctx)
+{
+ uintptr_t addr;
+
+ if (sctx) {
+ addr = (uintptr_t)sctx - offsetof(struct slbt_symlist_ctx_impl,sctx);
+ return (struct slbt_symlist_ctx_impl *)addr;
+ }
+
+ return 0;
+}
+
static inline void slbt_driver_set_arctx(
const struct slbt_driver_ctx * dctx,
const struct slbt_archive_ctx * arctx,
diff --git a/src/util/slbt_create_mapfile.c b/src/util/slbt_create_mapfile.c
new file mode 100644
index 0000000..d0f5d95
--- /dev/null
+++ b/src/util/slbt_create_mapfile.c
@@ -0,0 +1,127 @@
+/*******************************************************************/
+/* slibtool: a skinny 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_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_is_strong_coff_symbol(const char * sym)
+{
+ return strncmp(sym,"__imp_",6) && strncmp(sym,".weak.",6);
+}
+
+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 ** symv;
+ const char ** symstrv;
+
+ fmach = !strcmp(dctx->cctx->host.flavor,"darwin");
+
+ fcoff = !strcmp(dctx->cctx->host.flavor,"midipix");
+ fcoff = fcoff || !strcmp(dctx->cctx->host.flavor,"cygwin");
+ fcoff = fcoff || !strcmp(dctx->cctx->host.flavor,"mingw");
+ fcoff = fcoff || !strcmp(dctx->cctx->host.flavor,"msys2");
+
+ 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 (fcoff) {
+ if (slbt_dprintf(fdout,"%s\n",*symv) < 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);
+}
--
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