| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * arch/s390/kernel/base.S |
| * |
| * Copyright IBM Corp. 2006, 2007 |
| * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/nospec-insn.h> |
| #include <asm/ptrace.h> |
| |
| GEN_BR_THUNK %r9 |
| GEN_BR_THUNK %r14 |
| |
| __PT_R0 = __PT_GPRS |
| __PT_R8 = __PT_GPRS + 64 |
| |
| ENTRY(s390_base_pgm_handler) |
| stmg %r8,%r15,__LC_SAVE_AREA_SYNC |
| aghi %r15,-(STACK_FRAME_OVERHEAD+__PT_SIZE) |
| la %r11,STACK_FRAME_OVERHEAD(%r15) |
| xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) |
| stmg %r0,%r7,__PT_R0(%r11) |
| mvc __PT_PSW(16,%r11),__LC_PGM_OLD_PSW |
| mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC |
| lgr %r2,%r11 |
| larl %r1,s390_base_pgm_handler_fn |
| lg %r9,0(%r1) |
| ltgr %r9,%r9 |
| jz 1f |
| BASR_EX %r14,%r9 |
| mvc __LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15) |
| lmg %r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15) |
| lpswe __LC_RETURN_PSW |
| 1: larl %r13,disabled_wait_psw |
| lpswe 0(%r13) |
| ENDPROC(s390_base_pgm_handler) |
| |
| .align 8 |
| disabled_wait_psw: |
| .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler |
| |
| .section .bss |
| .align 8 |
| .globl s390_base_pgm_handler_fn |
| s390_base_pgm_handler_fn: |
| .quad 0 |
| .previous |
