root/gc/sparc_netbsd_mach_dep.s

   1 !       SPARCompiler 3.0 and later apparently no longer handles
   2 !       asm outside functions.  So we need a separate .s file
   3 !       This is only set up for SunOS 4.
   4 !       Assumes this is called before the stack contents are
   5 !       examined.
   7 #include "machine/asm.h"
   9         .seg    "text"
  10         .globl  _C_LABEL(GC_save_regs_in_stack)
  11         .globl  _C_LABEL(GC_push_regs)
  12 _C_LABEL(GC_save_regs_in_stack):
  13 _C_LABEL(GC_push_regs):
  14         ta      0x3   ! ST_FLUSH_WINDOWS
  15         mov     %sp,%o0
  16         retl
  17         nop
  19         .globl  _C_LABEL(GC_clear_stack_inner)
  20 _C_LABEL(GC_clear_stack_inner):
  21         mov     %sp,%o2         ! Save sp
  22         add     %sp,-8,%o3      ! p = sp-8
  23         clr     %g1             ! [g0,g1] = 0
  24         add     %o1,-0x60,%sp   ! Move sp out of the way,
  25                                 ! so that traps still work.
  26                                 ! Includes some extra words
  27                                 ! so we can be sloppy below.
  28 loop:
  29         std     %g0,[%o3]       ! *(long long *)p = 0
  30         cmp     %o3,%o1
  31         bgu     loop            ! if (p > limit) goto loop
  32         add     %o3,-8,%o3      ! p -= 8 (delay slot)
  33         retl
  34         mov     %o2,%sp         ! Restore sp., delay slot