klibc/klibc/arch/m32r/syscall.S

   1 /*
   2  * arch/m32r/syscall.S
   3  *
   4  *     r7 contains the syscall number (set by stub);
   5  * r0..r3 contains arguments 0-3 per standard calling convention;
   6  * r4..r5 contains arguments 4-5, but we have to get those from
   7  *        the stack.
   8  */
   9
  10         .section ".text","ax"
  11         .balign 4
  12         .globl  __syscall_common
  13         .type   __syscall_common,@function
  14 __syscall_common:
  15         ld      r4,@sp
  16         ld      r5,@(4,sp)
  17         trap    #2
  18         cmpi    r0, #-4096
  19         bnc     1f
  20         jmp     r14
  21 1:
  22         seth    r2,#high(errno)
  23         or3     r2,r2,#low(errno)
  24         neg     r1,r0
  25         st      r1,@r7
  26         ldi     r0,#-1
  27         jmp     r14
  28
  29         .size   __syscall_common,.-__syscall_common