| /* 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 |