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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [arc/] [sys/] [syscall.h] - Rev 258
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/* ARC system call interface */ /* A special version of the flag insn is used to distinguish syscalls from breakpoints (a breakpoint might be set at the same place). The upper 23 bits of the argument to a flag insn are not currently used. By convention, bit 31 is one to indicate this is a specially coded operand. The next 15 bits (bits 30-16) can be used for software purposes. The format isn't documented yet, so the pattern we use here may change. */ #define SYSCALL_MARKER 0x80010000 #define SYSCALL_MAGIC 0x61082300 /* Perform a system call. If ERR is 0, it succeeded. Otherwise it is a positive value for errno. */ #define SYSCALL(op, rc, err, r0, r1, r2) \ asm volatile ( "\ mov r0,%2\n\t \ mov r1,%3\n\t \ mov r2,%4\n\t \ mov r3,%5\n\t \ mov r4,%6\n\t \ flag %7\n\t \ nop\n\t \ nop\n\t \ nop\n\t \ mov %0,r0\n\t \ mov %1,r1" \ : "=r" (rc), "=r" (err) \ : "i" (SYSCALL_MAGIC), "r" (op), "r" (r0), "r" (r1), "r" (r2), \ "i" (1 | SYSCALL_MARKER) \ : "r0", "r1", "r2", "r3", "r4"); #define SYS_exit 1 #define SYS_open 2 #define SYS_close 3 #define SYS_read 4 #define SYS_write 5 #define SYS_lseek 6 #define SYS_link 7 #define SYS_unlink 8 #define SYS_chdir 9 #define SYS_chmod 10 #define SYS_stat 11 #define SYS_fstat 12 #define SYS_access 13 #define SYS_getpid 14 #define SYS_kill 15 #define SYS_time 16 #define SYS_MAX 17
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