LXR linux/arch/sparc/kernel/utrap.S

   1/* SPDX-License-Identifier: GPL-2.0 */
   2        .globl          utrap_trap
   3        .type           utrap_trap,#function
   4utrap_trap:             /* %g3=handler,%g4=level */
   5        TRAP_LOAD_THREAD_REG(%g6, %g1)
   6        ldx             [%g6 + TI_UTRAPS], %g1
   7        brnz,pt         %g1, invoke_utrap
   8         nop
   9
  10        ba,pt           %xcc, etrap
  11         rd             %pc, %g7
  12        mov             %l4, %o1
  13        call            bad_trap
  14         add            %sp, PTREGS_OFF, %o0
  15        ba,a,pt         %xcc, rtrap
  16
  17invoke_utrap:
  18        sllx            %g3, 3, %g3
  19        ldx             [%g1 + %g3], %g1
  20        save            %sp, -128, %sp
  21        rdpr            %tstate, %l6
  22        rdpr            %cwp, %l7
  23        andn            %l6, TSTATE_CWP, %l6
  24        wrpr            %l6, %l7, %tstate
  25        rdpr            %tpc, %l6
  26        rdpr            %tnpc, %l7
  27        wrpr            %g1, 0, %tnpc
  28        done
  29        .size           utrap_trap,.-utrap_trap
  30