LoongArch: Add support for ldconfig.

2025-12-24 17:51:17 +03:00 · 2023-03-07 20:23:57 +08:00
parent e78c4c4983
commit f0d33cbdce
4 changed files with 162 additions and 2 deletions
--- a/sysdeps/unix/sysv/linux/loongarch/dl-cache.h
+++ b/sysdeps/unix/sysv/linux/loongarch/dl-cache.h
@@ -0,0 +1,82 @@
+/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
+   Copyright (C) 2022-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <ldconfig.h>
+#include <assert.h>
+
+#if defined __loongarch_double_float
+# define _DL_CACHE_DEFAULT_ID    (FLAG_LARCH_FLOAT_ABI_DOUBLE | FLAG_ELF_LIBC6)
+#else
+# define _DL_CACHE_DEFAULT_ID    (FLAG_LARCH_FLOAT_ABI_SOFT | FLAG_ELF_LIBC6)
+#endif
+
+#define _dl_cache_check_flags(flags)                    \
+  ((flags) == _DL_CACHE_DEFAULT_ID)
+
+/* If given a path to one of our library directories, adds every library
+   directory via add_dir (), otherwise just adds the giver directory.  On
+   LoongArch, libraries can be found in paths ending in:
+     - /lib64
+     - /lib64/sf
+   so this will add all of those paths.  */
+
+#define add_system_dir(dir) 						\
+  do							    		\
+    {									\
+      static const char* lib_dirs[] = {					\
+	"/lib64",							\
+	"/lib64/sf",							\
+	NULL,								\
+      };								\
+      const size_t lib_len = sizeof ("/lib") - 1;			\
+      size_t len = strlen (dir);					\
+      char path[len + 6];						\
+      const char **ptr;							\
+									\
+      memcpy (path, dir, len + 1);					\
+									\
+      for (ptr = lib_dirs; *ptr != NULL; ptr++)				\
+	{								\
+	  const char *lib_dir = *ptr;					\
+	  size_t dir_len = strlen (lib_dir);				\
+									\
+	  if (len >= dir_len						\
+	      && !memcmp (path + len - dir_len, lib_dir, dir_len))	\
+	    {								\
+	      len -= dir_len - lib_len;					\
+	      path[len] = '\0';						\
+	      break;							\
+	    }								\
+	}								\
+      add_dir (path);							\
+      if (len >= lib_len						\
+	  && !memcmp (path + len - lib_len, "/lib", lib_len))		\
+	for (ptr = lib_dirs; *ptr != NULL; ptr++)			\
+	  {								\
+	    const char *lib_dir = *ptr;					\
+	    size_t dir_len = strlen (lib_dir);				\
+									\
+	    assert (dir_len >= lib_len);				\
+	    memcpy (path + len, lib_dir + lib_len,			\
+		    dir_len - lib_len + 1);				\
+	    add_dir (path);						\
+	  }								\
+    } while (0)
+
+
+#include_next <dl-cache.h>