mirror of
git://git.musl-libc.org/musl
synced 2025-01-10 08:39:56 +00:00
a4a3e4dbc0
this will allow the compiler to cache and reuse the result, meaning we
no longer have to take care not to load it more than once for the sake
of archs where the load may be expensive.
depends on commit 1c84c99913 for
correctness, since otherwise the compiler could hoist loads during
stage 3 of dynamic linking before the initial thread-pointer setup.
34 lines
779 B
C
34 lines
779 B
C
#if ((__ARM_ARCH_6K__ || __ARM_ARCH_6KZ__ || __ARM_ARCH_6ZK__) && !__thumb__) \
|
|
|| __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
|
|
|
|
static inline pthread_t __pthread_self()
|
|
{
|
|
char *p;
|
|
__asm__ ( "mrc p15,0,%0,c13,c0,3" : "=r"(p) );
|
|
return (void *)(p-sizeof(struct pthread));
|
|
}
|
|
|
|
#else
|
|
|
|
#if __ARM_ARCH_4__ || __ARM_ARCH_4T__ || __ARM_ARCH == 4
|
|
#define BLX "mov lr,pc\n\tbx"
|
|
#else
|
|
#define BLX "blx"
|
|
#endif
|
|
|
|
static inline pthread_t __pthread_self()
|
|
{
|
|
extern hidden uintptr_t __a_gettp_ptr;
|
|
register uintptr_t p __asm__("r0");
|
|
__asm__ ( BLX " %1" : "=r"(p) : "r"(__a_gettp_ptr) : "cc", "lr" );
|
|
return (void *)(p-sizeof(struct pthread));
|
|
}
|
|
|
|
#endif
|
|
|
|
#define TLS_ABOVE_TP
|
|
#define GAP_ABOVE_TP 8
|
|
#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread))
|
|
|
|
#define MC_PC arm_pc
|