musl/arch/arm/pthread_arch.h
Rich Felker ea71a9004e deduplicate TP_ADJ logic out of each arch, replace with TP_OFFSET
the only part of TP_ADJ that was not uniquely determined by
TLS_ABOVE_TP was the 0x7000 adjustment used mainly on mips and powerpc
variants.
2020-08-24 22:04:52 -04:00

32 lines
722 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 MC_PC arm_pc