diff options
Diffstat (limited to 'arch/sparc/kernel/utrap.S')
| -rw-r--r-- | arch/sparc/kernel/utrap.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/sparc/kernel/utrap.S b/arch/sparc/kernel/utrap.S new file mode 100644 index 000000000..7a2d9a9be --- /dev/null +++ b/arch/sparc/kernel/utrap.S @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + .globl utrap_trap + .type utrap_trap,#function +utrap_trap: /* %g3=handler,%g4=level */ + TRAP_LOAD_THREAD_REG(%g6, %g1) + ldx [%g6 + TI_UTRAPS], %g1 + brnz,pt %g1, invoke_utrap + nop + + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + call bad_trap + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap + +invoke_utrap: + sllx %g3, 3, %g3 + ldx [%g1 + %g3], %g1 + save %sp, -128, %sp + rdpr %tstate, %l6 + rdpr %cwp, %l7 + andn %l6, TSTATE_CWP, %l6 + wrpr %l6, %l7, %tstate + rdpr %tpc, %l6 + rdpr %tnpc, %l7 + wrpr %g1, 0, %tnpc + done + .size utrap_trap,.-utrap_trap |