mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-11-22 14:49:24 +01:00
fa1c12453b
LLD 13 and GNU ld 2.37 support -z start-stop-gc which allows garbage collection of C identifier name sections despite the __start_/__stop_ references. GNU ld before 2015-10 had the behavior as well. Simply set the retain attribute so that GCC 11 (if configure-time binutils is 2.36 or newer)/Clang 13 will set the SHF_GNU_RETAIN section attribute to prevent garbage collection. Without the patch, there are linker errors with -z start-stop-gc (LLD default) when -Wl,--gc-sections is used: ``` ld.lld: error: undefined symbol: __start___eap >>> referenced by eap.c >>> src/eap.o:(eap_init) ``` The remain attribute will not be needed if the metadata sections are referenced by code directly.
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/*
|
|
*
|
|
* Wireless daemon for Linux
|
|
*
|
|
* Copyright (C) 2019 Intel Corporation. All rights reserved.
|
|
*
|
|
* This 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.
|
|
*
|
|
* This 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
struct iwd_module_desc {
|
|
const char *name;
|
|
int (*init)(void);
|
|
void (*exit)(void);
|
|
bool active;
|
|
} __attribute__((aligned(8)));
|
|
|
|
struct iwd_module_depends {
|
|
const char *self;
|
|
const char *target;
|
|
};
|
|
|
|
#define IWD_MODULE(name, init, exit) \
|
|
_Pragma("GCC diagnostic push") \
|
|
_Pragma("GCC diagnostic ignored \"-Wattributes\"") \
|
|
static struct iwd_module_desc __iwd_module_ ## name \
|
|
__attribute__((used, retain, section("__iwd_module"), \
|
|
aligned(8))) = { \
|
|
#name, init, exit \
|
|
}; \
|
|
_Pragma("GCC diagnostic pop")
|
|
|
|
#define IWD_MODULE_DEPENDS(name, dep) \
|
|
_Pragma("GCC diagnostic push") \
|
|
_Pragma("GCC diagnostic ignored \"-Wattributes\"") \
|
|
static struct iwd_module_depends __iwd_module__##name##_##dep \
|
|
__attribute__((used, retain, \
|
|
section("__iwd_module_dep"), aligned(8))) = { \
|
|
.self = #name, \
|
|
.target = #dep, \
|
|
}; \
|
|
_Pragma("GCC diagnostic pop")
|
|
|
|
int iwd_modules_init(void);
|
|
void iwd_modules_exit(void);
|