LoongArch: Add support for ldconfig.

This commit is contained in:
caiyinyu 2023-03-07 20:23:57 +08:00
parent e78c4c4983
commit f0d33cbdce
4 changed files with 162 additions and 2 deletions

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@ -1,4 +1,4 @@
/* Copyright (C) 1999-2023 Free Software Foundation, Inc.
/* Copyright (C) 2022-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This program is free software; you can redistribute it and/or modify
@ -225,6 +225,12 @@ print_entry (const char *lib, int flag, uint64_t hwcap,
case FLAG_RISCV_FLOAT_ABI_DOUBLE:
fputs (",double-float", stdout);
break;
case FLAG_LARCH_FLOAT_ABI_SOFT:
fputs (",soft-float", stdout);
break;
case FLAG_LARCH_FLOAT_ABI_DOUBLE:
fputs (",double-float", stdout);
break;
case 0:
break;
default:

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@ -1,4 +1,4 @@
/* Copyright (C) 1999-2023 Free Software Foundation, Inc.
/* 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
@ -45,6 +45,8 @@
#define FLAG_MIPS64_LIBN64_NAN2008 0x0e00
#define FLAG_RISCV_FLOAT_ABI_SOFT 0x0f00
#define FLAG_RISCV_FLOAT_ABI_DOUBLE 0x1000
#define FLAG_LARCH_FLOAT_ABI_SOFT 0x1100
#define FLAG_LARCH_FLOAT_ABI_DOUBLE 0x1200
/* Name of auxiliary cache. */
#define _PATH_LDCONFIG_AUX_CACHE "/var/cache/ldconfig/aux-cache"

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@ -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>

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@ -0,0 +1,70 @@
/* Support for reading ELF files.
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/>. */
int process_elf64_file (const char *file_name, const char *lib,
int *flag, unsigned int *isa_level, char **soname,
void *file_contents, size_t file_length);
#define SUPPORTED_ELF_FLAGS \
(EF_LARCH_ABI_DOUBLE_FLOAT | EF_LARCH_ABI_SOFT_FLOAT)
/* Returns 0 if everything is ok, != 0 in case of error. */
int
process_elf_file (const char *file_name, const char *lib, int *flag,
unsigned int *isa_level, char **soname, void *file_contents,
size_t file_length)
{
ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
Elf64_Ehdr *elf64_header = (Elf64_Ehdr *) elf_header;
int ret;
long flags;
/* LoongArch libraries are always libc.so.6+. */
*flag = FLAG_ELF_LIBC6;
ret = process_elf64_file (file_name, lib, flag, isa_level, soname,
file_contents, file_length);
flags = elf64_header->e_flags;
/* LoongArch linkers encode the floating point ABI as part of the ELF headers. */
switch (flags & SUPPORTED_ELF_FLAGS)
{
case EF_LARCH_ABI_SOFT_FLOAT:
*flag |= FLAG_LARCH_FLOAT_ABI_SOFT;
break;
case EF_LARCH_ABI_DOUBLE_FLOAT:
*flag |= FLAG_LARCH_FLOAT_ABI_DOUBLE;
break;
default:
return 1;
}
/* If there are any other ELF flags set then glibc doesn't support this
library. */
if (flags & ~SUPPORTED_ELF_FLAGS)
return 1;
return ret;
}
#undef __ELF_NATIVE_CLASS
#undef process_elf_file
#define process_elf_file process_elf64_file
#define __ELF_NATIVE_CLASS 64
#include "elf/readelflib.c"