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git://git.musl-libc.org/musl
synced 2024-12-25 16:12:48 +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.
20 lines
475 B
C
20 lines
475 B
C
static inline struct pthread *__pthread_self()
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{
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#ifdef __clang__
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char *tp;
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__asm__ __volatile__ (".word 0x7c03e83b ; move %0, $3" : "=r" (tp) : : "$3" );
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#else
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register char *tp __asm__("$3");
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/* rdhwr $3,$29 */
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__asm__ __volatile__ (".word 0x7c03e83b" : "=r" (tp) );
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#endif
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return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));
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}
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#define TLS_ABOVE_TP
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#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) + 0x7000)
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#define DTP_OFFSET 0x8000
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#define MC_PC pc
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