linux/tools/testing/selftests/powerpc/tm/tm-signal.S
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

111 lines
2.8 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright 2015, Cyril Bur, IBM Corp.
*/
#include "basic_asm.h"
#include "gpr_asm.h"
#include "fpu_asm.h"
#include "vmx_asm.h"
#include "vsx_asm.h"
/*
* Large caveat here being that the caller cannot expect the
* signal to always be sent! The hardware can (AND WILL!) abort
* the transaction between the tbegin and the tsuspend (however
* unlikely it seems or infrequently it actually happens).
* You have been warned.
*/
/* long tm_signal_self(pid_t pid, long *gprs, double *fps, vector *vms, vector *vss); */
FUNC_START(tm_signal_self_context_load)
PUSH_BASIC_STACK(512)
/*
* Don't strictly need to save and restore as it depends on if
* we're going to use them, however this reduces messy logic
*/
PUSH_VMX(STACK_FRAME_LOCAL(5,0),r8)
PUSH_FPU(512)
PUSH_NVREGS_BELOW_FPU(512)
std r3, STACK_FRAME_PARAM(0)(sp) /* pid */
std r4, STACK_FRAME_PARAM(1)(sp) /* gps */
std r5, STACK_FRAME_PARAM(2)(sp) /* fps */
std r6, STACK_FRAME_PARAM(3)(sp) /* vms */
std r7, STACK_FRAME_PARAM(4)(sp) /* vss */
ld r3, STACK_FRAME_PARAM(1)(sp)
cmpdi r3, 0
beq skip_gpr_lc
bl load_gpr
skip_gpr_lc:
ld r3, STACK_FRAME_PARAM(2)(sp)
cmpdi r3, 0
beq skip_fpu_lc
bl load_fpu
skip_fpu_lc:
ld r3, STACK_FRAME_PARAM(3)(sp)
cmpdi r3, 0
beq skip_vmx_lc
bl load_vmx
skip_vmx_lc:
ld r3, STACK_FRAME_PARAM(4)(sp)
cmpdi r3, 0
beq skip_vsx_lc
bl load_vsx
skip_vsx_lc:
/*
* Set r3 (return value) before tbegin. Use the pid as a known
* 'all good' return value, zero is used to indicate a non-doomed
* transaction.
*/
ld r3, STACK_FRAME_PARAM(0)(sp)
tbegin.
beq 1f
tsuspend. /* Can't enter a syscall transactionally */
ld r3, STACK_FRAME_PARAM(1)(sp)
cmpdi r3, 0
beq skip_gpr_lt
/* Get the second half of the array */
addi r3, r3, 8 * 18
bl load_gpr
skip_gpr_lt:
ld r3, STACK_FRAME_PARAM(2)(sp)
cmpdi r3, 0
beq skip_fpu_lt
/* Get the second half of the array */
addi r3, r3, 8 * 18
bl load_fpu
skip_fpu_lt:
ld r3, STACK_FRAME_PARAM(3)(sp)
cmpdi r3, 0
beq skip_vmx_lt
/* Get the second half of the array */
addi r3, r3, 16 * 12
bl load_vmx
skip_vmx_lt:
ld r3, STACK_FRAME_PARAM(4)(sp)
cmpdi r3, 0
beq skip_vsx_lt
/* Get the second half of the array */
addi r3, r3, 16 * 12
bl load_vsx
skip_vsx_lt:
li r0, 37 /* sys_kill */
ld r3, STACK_FRAME_PARAM(0)(sp) /* pid */
li r4, 10 /* SIGUSR1 */
sc /* Taking the signal will doom the transaction */
tabort. 0
tresume. /* Be super sure we abort */
/*
* This will cause us to resume doomed transaction and cause
* hardware to cleanup, we'll end up at 1: anything between
* tresume. and 1: shouldn't ever run.
*/
li r3, 0
1:
POP_VMX(STACK_FRAME_LOCAL(5,0),r4)
POP_FPU(512)
POP_NVREGS_BELOW_FPU(512)
POP_BASIC_STACK(512)
blr
FUNC_END(tm_signal_self_context_load)