arch/sparc/kernel/sunos_asm.S

   1 /* $Id: sunos_asm.S,v 1.15 2000/01/11 17:33:21 jj Exp $
   2  * sunos_asm.S: SunOS system calls which must have a low-level
   3  *              entry point to operate correctly.
   4  *
   5  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   6  *
   7  * Based upon preliminary work which is:
   8  *
   9  * Copyright (C) 1995 Adrian M. Rodriguez (adrian@remus.rutgers.edu)
  10  */
  11
  12 #include <asm/ptrace.h>
  13
  14         .text
  15         .align 4
  16
  17         /* When calling ret_sys_call, %o0 should contain the same
  18          * value as in [%sp + STACKFRAME_SZ + PT_I0] */
  19
  20         /* SunOS getpid() returns pid in %o0 and ppid in %o1 */
  21         .globl  sunos_getpid
  22 sunos_getpid:
  23         call    sys_getppid
  24          nop
  25
  26         call    sys_getpid
  27          st     %o0, [%sp + STACKFRAME_SZ + PT_I1]
  28
  29         b       ret_sys_call
  30          st     %o0, [%sp + STACKFRAME_SZ + PT_I0]
  31
  32         /* SunOS getuid() returns uid in %o0 and euid in %o1 */
  33         .globl  sunos_getuid
  34 sunos_getuid:
  35         call    sys_geteuid16
  36          nop
  37
  38         call    sys_getuid16
  39          st     %o0, [%sp + STACKFRAME_SZ + PT_I1]
  40
  41         b       ret_sys_call
  42          st     %o0, [%sp + STACKFRAME_SZ + PT_I0]
  43
  44         /* SunOS getgid() returns gid in %o0 and egid in %o1 */
  45         .globl  sunos_getgid
  46 sunos_getgid:
  47         call    sys_getegid16
  48          nop
  49
  50         call    sys_getgid16
  51          st     %o0, [%sp + STACKFRAME_SZ + PT_I1]
  52
  53         b       ret_sys_call
  54          st     %o0, [%sp + STACKFRAME_SZ + PT_I0]
  55
  56         /* SunOS's execv() call only specifies the argv argument, the
  57          * environment settings are the same as the calling processes.
  58          */
  59         .globl  sunos_execv
  60 sunos_execv:
  61         st      %g0, [%sp + STACKFRAME_SZ + PT_I2]
  62
  63         call    sparc_execve
  64          add    %sp, STACKFRAME_SZ, %o0
  65
  66         b       ret_sys_call
  67          ld     [%sp + STACKFRAME_SZ + PT_I0], %o0