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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b2212ea41d
While the trap number and error code are passed around for debugging purposes, this occurs wholly independently of the thread struct values. These values were never part of the sigcontext ABI and are thus never passed anywhere, so we can just kill them off across the board. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/*
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* arch/sh/kernel/cpu/sh5/fpu.c
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*
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* Copyright (C) 2001 Manuela Cirronis, Paolo Alberelli
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* Copyright (C) 2002 STMicroelectronics Limited
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* Author : Stuart Menefy
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*
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* Started from SH4 version:
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* Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <asm/processor.h>
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void save_fpu(struct task_struct *tsk)
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{
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asm volatile("fst.p %0, (0*8), fp0\n\t"
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"fst.p %0, (1*8), fp2\n\t"
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"fst.p %0, (2*8), fp4\n\t"
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"fst.p %0, (3*8), fp6\n\t"
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"fst.p %0, (4*8), fp8\n\t"
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"fst.p %0, (5*8), fp10\n\t"
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"fst.p %0, (6*8), fp12\n\t"
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"fst.p %0, (7*8), fp14\n\t"
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"fst.p %0, (8*8), fp16\n\t"
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"fst.p %0, (9*8), fp18\n\t"
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"fst.p %0, (10*8), fp20\n\t"
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"fst.p %0, (11*8), fp22\n\t"
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"fst.p %0, (12*8), fp24\n\t"
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"fst.p %0, (13*8), fp26\n\t"
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"fst.p %0, (14*8), fp28\n\t"
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"fst.p %0, (15*8), fp30\n\t"
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"fst.p %0, (16*8), fp32\n\t"
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"fst.p %0, (17*8), fp34\n\t"
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"fst.p %0, (18*8), fp36\n\t"
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"fst.p %0, (19*8), fp38\n\t"
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"fst.p %0, (20*8), fp40\n\t"
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"fst.p %0, (21*8), fp42\n\t"
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"fst.p %0, (22*8), fp44\n\t"
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"fst.p %0, (23*8), fp46\n\t"
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"fst.p %0, (24*8), fp48\n\t"
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"fst.p %0, (25*8), fp50\n\t"
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"fst.p %0, (26*8), fp52\n\t"
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"fst.p %0, (27*8), fp54\n\t"
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"fst.p %0, (28*8), fp56\n\t"
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"fst.p %0, (29*8), fp58\n\t"
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"fst.p %0, (30*8), fp60\n\t"
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"fst.p %0, (31*8), fp62\n\t"
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"fgetscr fr63\n\t"
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"fst.s %0, (32*8), fr63\n\t"
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: /* no output */
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: "r" (&tsk->thread.xstate->hardfpu)
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: "memory");
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}
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void restore_fpu(struct task_struct *tsk)
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{
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asm volatile("fld.p %0, (0*8), fp0\n\t"
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"fld.p %0, (1*8), fp2\n\t"
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"fld.p %0, (2*8), fp4\n\t"
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"fld.p %0, (3*8), fp6\n\t"
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"fld.p %0, (4*8), fp8\n\t"
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"fld.p %0, (5*8), fp10\n\t"
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"fld.p %0, (6*8), fp12\n\t"
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"fld.p %0, (7*8), fp14\n\t"
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"fld.p %0, (8*8), fp16\n\t"
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"fld.p %0, (9*8), fp18\n\t"
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"fld.p %0, (10*8), fp20\n\t"
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"fld.p %0, (11*8), fp22\n\t"
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"fld.p %0, (12*8), fp24\n\t"
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"fld.p %0, (13*8), fp26\n\t"
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"fld.p %0, (14*8), fp28\n\t"
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"fld.p %0, (15*8), fp30\n\t"
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"fld.p %0, (16*8), fp32\n\t"
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"fld.p %0, (17*8), fp34\n\t"
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"fld.p %0, (18*8), fp36\n\t"
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"fld.p %0, (19*8), fp38\n\t"
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"fld.p %0, (20*8), fp40\n\t"
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"fld.p %0, (21*8), fp42\n\t"
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"fld.p %0, (22*8), fp44\n\t"
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"fld.p %0, (23*8), fp46\n\t"
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"fld.p %0, (24*8), fp48\n\t"
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"fld.p %0, (25*8), fp50\n\t"
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"fld.p %0, (26*8), fp52\n\t"
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"fld.p %0, (27*8), fp54\n\t"
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"fld.p %0, (28*8), fp56\n\t"
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"fld.p %0, (29*8), fp58\n\t"
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"fld.p %0, (30*8), fp60\n\t"
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"fld.s %0, (32*8), fr63\n\t"
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"fputscr fr63\n\t"
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"fld.p %0, (31*8), fp62\n\t"
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: /* no output */
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: "r" (&tsk->thread.xstate->hardfpu)
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: "memory");
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}
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asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs)
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{
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struct task_struct *tsk = current;
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regs->pc += 4;
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force_sig(SIGFPE, tsk);
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}
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