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https://github.com/fluencelabs/musl
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4f69594689
the lifetime of compound literals is the block in which they appear. the temporary struct __timespec_kernel objects created as compound literals no longer existed at the time their addresses were passed to the kernel.
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#include <sys/syscall.h>
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#ifdef SHARED
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__attribute__((__visibility__("hidden")))
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#endif
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long __syscall_cp_internal(volatile void*, long long, long long, long long, long long,
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long long, long long, long long);
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struct __timespec { long long tv_sec; long tv_nsec; };
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struct __timespec_kernel { long long tv_sec; long long tv_nsec; };
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#define __tsc(X) ((struct __timespec*)(unsigned long)(X))
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#define __fixup(X) do { if(X) { \
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ts->tv_sec = __tsc(X)->tv_sec; \
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ts->tv_nsec = __tsc(X)->tv_nsec; \
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(X) = (unsigned long)ts; } } while(0)
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#ifdef SHARED
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__attribute__((__visibility__("hidden")))
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#endif
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long __syscall_cp_asm (volatile void * foo, long long n, long long a1, long long a2, long long a3,
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long long a4, long long a5, long long a6)
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{
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struct __timespec_kernel ts[1];
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switch (n) {
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case SYS_mq_timedsend: case SYS_mq_timedreceive: case SYS_pselect6:
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__fixup(a5);
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break;
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case SYS_futex:
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if((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */)
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__fixup(a4);
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break;
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case SYS_clock_nanosleep:
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case SYS_rt_sigtimedwait: case SYS_ppoll:
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__fixup(a3);
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break;
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case SYS_nanosleep:
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__fixup(a1);
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break;
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}
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return __syscall_cp_internal(foo, n, a1, a2, a3, a4, a5, a6);
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}
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