cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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signal.S (973B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Copyright 2015, Cyril Bur, IBM Corp.
      4 */
      5
      6#include "basic_asm.h"
      7
      8/* long signal_self(pid_t pid, int sig); */
      9FUNC_START(signal_self)
     10	li	r0,37 /* sys_kill */
     11	/* r3 already has our pid in it */
     12	/* r4 already has signal type in it */
     13	sc
     14	bc	4,3,1f
     15	subfze	r3,r3
     161:	blr
     17FUNC_END(signal_self)
     18
     19/* long tm_signal_self(pid_t pid, int sig, int *ret); */
     20FUNC_START(tm_signal_self)
     21	PUSH_BASIC_STACK(8)
     22	std	r5,STACK_FRAME_PARAM(0)(sp) /* ret */
     23	tbegin.
     24	beq	1f
     25	tsuspend.
     26	li	r0,37 /* sys_kill */
     27	/* r3 already has our pid in it */
     28	/* r4 already has signal type in it */
     29	sc
     30	ld	r5,STACK_FRAME_PARAM(0)(sp) /* ret */
     31	bc	4,3,2f
     32	subfze	r3,r3
     332:	std	r3,0(r5)
     34	tabort. 0
     35	tresume. /* Be nice to some cleanup, jumps back to tbegin then to 1: */
     36	/*
     37	 * Transaction should be proper doomed and we should never get
     38	 * here
     39	 */
     40	li	r3,1
     41	POP_BASIC_STACK(8)
     42	blr
     431:	li	r3,0
     44	POP_BASIC_STACK(8)
     45	blr
     46FUNC_END(tm_signal_self)