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git://git.musl-libc.org/musl
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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.
23 lines
555 B
C
23 lines
555 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__ ("mr %0, 2" : "=r"(tp) : : );
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#else
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register char *tp __asm__("r2");
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__asm__ __volatile__ ("" : "=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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// the kernel calls the ip "nip", it's the first saved value after the 32
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// GPRs.
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#define MC_PC gregs[32]
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#define CANARY canary_at_end
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