| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * pipe syscall for uClibc sh |
| 4 | * |
| 5 | * Copyright (C) 2001 Lineo, <davidm@lineo.com> |
| 6 | * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> |
| 7 | * |
| 8 | * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| 9 | */ |
| 10 | |
| 11 | #include <errno.h> |
| 12 | #include <unistd.h> |
| 13 | #include <syscall.h> |
| 14 | |
| 15 | |
| 16 | int pipe(int *fd) |
| 17 | { |
| 18 | long __res, __res2; |
| 19 | __asm__ __volatile__ ( |
| 20 | "mov %2, r3;" |
| 21 | "mov %3, r4;" |
| 22 | "trapa %4;" |
| 23 | "mov r1, %1;" |
| 24 | : "=z" (__res), |
| 25 | "=r" ((long) __res2) |
| 26 | : "r" ((long) __NR_pipe), |
| 27 | "r" ((long) fd), |
| 28 | "i" (__SH_SYSCALL_TRAP_BASE + 3) |
| 29 | : "cc", "memory", "r1", "r3", "r4"); |
| 30 | if ((unsigned long)(__res) >= (unsigned long)(-125)) { |
| 31 | int __err = -(__res); |
| 32 | errno = __err; |
| 33 | return(-1); |
| 34 | } |
| 35 | fd[0] = __res; |
| 36 | fd[1] = __res2; |
| 37 | return(0); |
| 38 | } |
| 39 | libc_hidden_def(pipe) |