cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ppc_save_regs.S (2100B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Copyright (C) 1996 Paul Mackerras.
      4 *
      5 * NOTE: assert(sizeof(buf) > 23 * sizeof(long))
      6 */
      7#include <asm/processor.h>
      8#include <asm/ppc_asm.h>
      9#include <asm/asm-offsets.h>
     10#include <asm/ptrace.h>
     11#include <asm/asm-compat.h>
     12
     13/*
     14 * Grab the register values as they are now.
     15 * This won't do a particularly good job because we really
     16 * want our caller's caller's registers, and our caller has
     17 * already executed its prologue.
     18 * ToDo: We could reach back into the caller's save area to do
     19 * a better job of representing the caller's state (note that
     20 * that will be different for 32-bit and 64-bit, because of the
     21 * different ABIs, though).
     22 */
     23_GLOBAL(ppc_save_regs)
     24	PPC_STL	r0,0*SZL(r3)
     25#ifdef CONFIG_PPC32
     26	stmw	r2, 2*SZL(r3)
     27#else
     28	PPC_STL	r2,2*SZL(r3)
     29	PPC_STL	r3,3*SZL(r3)
     30	PPC_STL	r4,4*SZL(r3)
     31	PPC_STL	r5,5*SZL(r3)
     32	PPC_STL	r6,6*SZL(r3)
     33	PPC_STL	r7,7*SZL(r3)
     34	PPC_STL	r8,8*SZL(r3)
     35	PPC_STL	r9,9*SZL(r3)
     36	PPC_STL	r10,10*SZL(r3)
     37	PPC_STL	r11,11*SZL(r3)
     38	PPC_STL	r12,12*SZL(r3)
     39	PPC_STL	r13,13*SZL(r3)
     40	PPC_STL	r14,14*SZL(r3)
     41	PPC_STL	r15,15*SZL(r3)
     42	PPC_STL	r16,16*SZL(r3)
     43	PPC_STL	r17,17*SZL(r3)
     44	PPC_STL	r18,18*SZL(r3)
     45	PPC_STL	r19,19*SZL(r3)
     46	PPC_STL	r20,20*SZL(r3)
     47	PPC_STL	r21,21*SZL(r3)
     48	PPC_STL	r22,22*SZL(r3)
     49	PPC_STL	r23,23*SZL(r3)
     50	PPC_STL	r24,24*SZL(r3)
     51	PPC_STL	r25,25*SZL(r3)
     52	PPC_STL	r26,26*SZL(r3)
     53	PPC_STL	r27,27*SZL(r3)
     54	PPC_STL	r28,28*SZL(r3)
     55	PPC_STL	r29,29*SZL(r3)
     56	PPC_STL	r30,30*SZL(r3)
     57	PPC_STL	r31,31*SZL(r3)
     58	lbz	r0,PACAIRQSOFTMASK(r13)
     59	PPC_STL	r0,SOFTE-STACK_FRAME_OVERHEAD(r3)
     60#endif
     61	/* go up one stack frame for SP */
     62	PPC_LL	r4,0(r1)
     63	PPC_STL	r4,1*SZL(r3)
     64	/* get caller's LR */
     65	PPC_LL	r0,LRSAVE(r4)
     66	PPC_STL	r0,_LINK-STACK_FRAME_OVERHEAD(r3)
     67	mflr	r0
     68	PPC_STL	r0,_NIP-STACK_FRAME_OVERHEAD(r3)
     69	mfmsr	r0
     70	PPC_STL	r0,_MSR-STACK_FRAME_OVERHEAD(r3)
     71	mfctr	r0
     72	PPC_STL	r0,_CTR-STACK_FRAME_OVERHEAD(r3)
     73	mfxer	r0
     74	PPC_STL	r0,_XER-STACK_FRAME_OVERHEAD(r3)
     75	mfcr	r0
     76	PPC_STL	r0,_CCR-STACK_FRAME_OVERHEAD(r3)
     77	li	r0,0
     78	PPC_STL	r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
     79	PPC_STL	r0,ORIG_GPR3-STACK_FRAME_OVERHEAD(r3)
     80	blr