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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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