29 lines
588 B
C
29 lines
588 B
C
#include <unistd.h>
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#include <sys/syscall.h>
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/* pipe() on alpha returns both file descriptors in registers --
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$0 and $20 respectively. This is unlike any other system call,
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as far as I can tell. */
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int pipe(int *fds)
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{
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register long sc_0 __asm__("$0");
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register long sc_19 __asm__("$19");
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register long sc_20 __asm__("$20");
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sc_0 = __NR_pipe;
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asm volatile("callsys" : "=r" (sc_0), "=r" (sc_19), "=r" (sc_20)
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: "0" (sc_0)
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: _syscall_clobbers);
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if ( sc_19 ) {
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errno = sc_19;
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return -1;
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}
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fds[0] = sc_0;
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fds[1] = sc_20;
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return 0;
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}
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