mirror of
git://git.musl-libc.org/musl
synced 2024-12-13 18:25:52 +00:00
cb1bf2f321
using the actual mcontext_t definition rather than an overlaid pointer array both improves correctness/readability and eliminates some ugly hacks for archs with 64-bit registers bit 32-bit program counter. also fix UB due to comparison of pointers not in a common array object.
31 lines
719 B
C
31 lines
719 B
C
#if ((__ARM_ARCH_6K__ || __ARM_ARCH_6ZK__) && !__thumb__) \
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|| __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
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static inline pthread_t __pthread_self()
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{
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char *p;
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__asm__ __volatile__ ( "mrc p15,0,%0,c13,c0,3" : "=r"(p) );
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return (void *)(p+8-sizeof(struct pthread));
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}
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#else
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static inline pthread_t __pthread_self()
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{
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#ifdef __clang__
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char *p;
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__asm__ __volatile__ ( "bl __a_gettp\n\tmov %0,r0" : "=r"(p) : : "cc", "r0", "lr" );
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#else
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register char *p __asm__("r0");
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__asm__ __volatile__ ( "bl __a_gettp" : "=r"(p) : : "cc", "lr" );
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#endif
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return (void *)(p+8-sizeof(struct pthread));
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}
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#endif
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#define TLS_ABOVE_TP
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#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) - 8)
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#define MC_PC arm_pc
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