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More robust linker sets

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See also:

https://gcc.gnu.org/ml/gcc/2016-09/msg00114.html
This commit is contained in:
Sebastian Huber 2016-10-26 14:38:23 +02:00
parent cf882982fa
commit ed499fab5b
1 changed files with 24 additions and 8 deletions
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32
freebsd/sys/sys/linker_set.h
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@ -33,6 +33,9 @@
#ifndef _SYS_CDEFS_H_ #ifndef _SYS_CDEFS_H_
#error this file needs sys/cdefs.h as a prerequisite #error this file needs sys/cdefs.h as a prerequisite
#endif #endif
#ifdef __rtems__
#include <sys/_types.h>
#endif /* __rtems__ */
/* /*
* The following macros are used to declare global sets of objects, which * The following macros are used to declare global sets of objects, which
@ -52,17 +55,17 @@
__section("set_" #set) __used = &sym __section("set_" #set) __used = &sym
#else /* __rtems__ */ #else /* __rtems__ */
#define RTEMS_BSD_DEFINE_SET(set, type) \ #define RTEMS_BSD_DEFINE_SET(set, type) \
type volatile const __CONCAT(_bsd__start_set_,set)[0] \ type const __CONCAT(_bsd__start_set_,set)[0] \
__section(".rtemsroset.bsd." __STRING(set) ".begin") __used; \ __section(".rtemsroset.bsd." __STRING(set) ".begin") __used; \
type volatile const __CONCAT(_bsd__stop_set_,set)[0] \ type const __CONCAT(_bsd__stop_set_,set)[0] \
__section(".rtemsroset.bsd." __STRING(set) ".end") __used __section(".rtemsroset.bsd." __STRING(set) ".end") __used
#define RTEMS_BSD_DECLARE_SET(set, type) \ #define RTEMS_BSD_DECLARE_SET(set, type) \
extern type volatile const __CONCAT(_bsd__start_set_,set)[0]; \ extern type const __CONCAT(_bsd__start_set_,set)[0]; \
extern type volatile const __CONCAT(_bsd__stop_set_,set)[0] extern type const __CONCAT(_bsd__stop_set_,set)[0]
#define RTEMS_BSD_DEFINE_SET_ITEM(set, sym, type) \ #define RTEMS_BSD_DEFINE_SET_ITEM(set, sym, type) \
static type volatile const __set_##set##_sym_##sym \ static type const __set_##set##_sym_##sym \
__section(".rtemsroset.bsd." __STRING(set) ".content") __used __section(".rtemsroset.bsd." __STRING(set) ".content") __used
#define __MAKE_SET(set, sym) \ #define __MAKE_SET(set, sym) \
@ -75,11 +78,11 @@
__section(".rtemsrwset.bsd." __STRING(set) ".end") __used __section(".rtemsrwset.bsd." __STRING(set) ".end") __used
#define RTEMS_BSD_DECLARE_RWSET(set, type) \ #define RTEMS_BSD_DECLARE_RWSET(set, type) \
extern type volatile __CONCAT(_bsd__start_set_,set)[0]; \ extern type __CONCAT(_bsd__start_set_,set)[0]; \
extern type volatile __CONCAT(_bsd__stop_set_,set)[0] extern type __CONCAT(_bsd__stop_set_,set)[0]
#define RTEMS_BSD_DEFINE_RWSET_ITEM(set, sym, type) \ #define RTEMS_BSD_DEFINE_RWSET_ITEM(set, sym, type) \
static type volatile __set_##set##_sym_##sym \ static type __set_##set##_sym_##sym \
__section(".rtemsrwset.bsd." __STRING(set) ".content") __used __section(".rtemsrwset.bsd." __STRING(set) ".content") __used
#define __MAKE_RWSET(set, sym) \ #define __MAKE_RWSET(set, sym) \
@ -136,8 +139,21 @@
* containing those addresses. Thus is must be declared as "type **pvar", * containing those addresses. Thus is must be declared as "type **pvar",
* and the address of each set item is obtained inside the loop by "*pvar". * and the address of each set item is obtained inside the loop by "*pvar".
*/ */
#ifndef __rtems__
#define SET_FOREACH(pvar, set) \ #define SET_FOREACH(pvar, set) \
for (pvar = SET_BEGIN(set); pvar < SET_LIMIT(set); pvar++) for (pvar = SET_BEGIN(set); pvar < SET_LIMIT(set); pvar++)
#else /* __rtems__ */
static __inline void *
_set_next(__uintptr_t pvar, __size_t s)
{
__asm__("" : "+r" (pvar));
return (void *)(pvar + s);
}
#define SET_FOREACH(pvar, set) \
for (pvar = SET_BEGIN(set); pvar < SET_LIMIT(set); \
pvar = _set_next((__uintptr_t)pvar, sizeof(*pvar)))
#endif /* __rtems__ */
#define SET_ITEM(set, i) \ #define SET_ITEM(set, i) \
((SET_BEGIN(set))[i]) ((SET_BEGIN(set))[i])