/usr/src/blcr-0.8.5/vmadump4/vmadump_alpha.c is in blcr-dkms 0.8.5-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 | /*-------------------------------------------------------------------------
* vmadump_alpha.c: alpha specific dumping/undumping routines
*
* Copyright (C) 1999-2001 by Erik Hendriks <erik@hendriks.cx>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: vmadump_alpha.c,v 1.6.16.1 2010/08/12 21:58:35 phargrov Exp $
*-----------------------------------------------------------------------*/
#define __NO_VERSION__
#ifdef CR_NEED_AUTOCONF_H
#include <linux/autoconf.h>
#endif
#if defined(CONFIG_SMP) && ! defined(__SMP__)
#define __SMP__
#endif
#if defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS)
#define MODVERSIONS
#endif
#if defined(MODVERSIONS)
#include <linux/modversions.h>
#endif
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#define __VMADUMP_INTERNAL__
#include "vmadump.h"
long vmadump_store_cpu(cr_chkpt_proc_req_t *ctx, struct file *file,
struct pt_regs *regs) {
struct switch_stack *ss;
unsigned long usp;
long bytes = 0, r;
/* Store struct pt_regs */
r = write_kern(ctx, file, regs, sizeof(*regs));
if (r != sizeof(*regs)) goto err;
bytes += r;
/* Alpha has more registers than what's in struct ptregs to save
* The 'switch_stack' structure contains the rest of the integer
* registers and the floating point registers. Then we still have
* to go after the user's stack pointer via the PAL code. */
/* Some pointer voodoo... the switch_stack structure got
* pushed on top of the struct pt_regs.. */
ss = ((struct switch_stack *) regs)-1;
usp = rdusp();
r = write_kern(ctx, file, ss, sizeof(*ss));
if (r != sizeof(*ss)) goto err;
bytes += r;
r = write_kern(ctx, file, &usp, sizeof(usp));
if (r != sizeof(usp)) goto err;
bytes += r;
return bytes;
err:
if (r >= 0) r = -EIO;
return r;
}
int vmadump_restore_cpu(cr_rstrt_proc_req_t *ctx, struct file *file,
struct pt_regs *regs) {
struct pt_regs regtmp;
struct switch_stack *ss, sstmp;
unsigned long usp;
int r;
r = read_kern(ctx, file, ®tmp, sizeof(regtmp));
if (r != sizeof(regtmp)) goto bad_read;
/* Read extra reg info for alpha */
ss = ((struct switch_stack *)regs)-1;
r = read_kern(ctx, file, &sstmp, sizeof(sstmp));
if (r != sizeof(sstmp)) goto bad_read;
r = read_kern(ctx, file, &usp, sizeof(usp));
if (r != sizeof(usp)) goto bad_read;
/* These are the tid-bits we don't want to restore */
regtmp.ps = 8; /* Processor status 8 = user space */
regtmp.hae = regs->hae; /* XXX What is this reg? */
sstmp.r26 = ss->r26; /* Not actually the user r26(ra). That
* one is in struct pt_regs. */
/* Ok, do restore */
memcpy(regs, ®tmp, sizeof(regtmp));
memcpy(ss, &sstmp, sizeof(sstmp)); /* Restores FP regs + saved regs */
wrusp(usp);
return 0;
bad_read:
if (r >= 0) r = -EIO;
return r;
}
#define SWITCH_STACK_SIZE "320"
/* do_switch_stack/undo_switch_stack stolen from arch/alpha/kernel/entry.S */
asm(
".align 3 \n"
".ent save_switch_stack \n"
"save_switch_stack: \n"
" lda $30,-"SWITCH_STACK_SIZE"($30) \n"
" stq $9,0($30) \n"
" stq $10,8($30) \n"
" stq $11,16($30) \n"
" stq $12,24($30) \n"
" stq $13,32($30) \n"
" stq $14,40($30) \n"
" stq $15,48($30) \n"
" stq $26,56($30) \n"
" stt $f0,64($30) \n"
" stt $f1,72($30) \n"
" stt $f2,80($30) \n"
" stt $f3,88($30) \n"
" stt $f4,96($30) \n"
" stt $f5,104($30) \n"
" stt $f6,112($30) \n"
" stt $f7,120($30) \n"
" stt $f8,128($30) \n"
" stt $f9,136($30) \n"
" stt $f10,144($30) \n"
" stt $f11,152($30) \n"
" stt $f12,160($30) \n"
" stt $f13,168($30) \n"
" stt $f14,176($30) \n"
" stt $f15,184($30) \n"
" stt $f16,192($30) \n"
" stt $f17,200($30) \n"
" stt $f18,208($30) \n"
" stt $f19,216($30) \n"
" stt $f20,224($30) \n"
" stt $f21,232($30) \n"
" stt $f22,240($30) \n"
" stt $f23,248($30) \n"
" stt $f24,256($30) \n"
" stt $f25,264($30) \n"
" stt $f26,272($30) \n"
" stt $f27,280($30) \n"
" mf_fpcr $f0 \n"
" stt $f28,288($30) \n"
" stt $f29,296($30) \n"
" stt $f30,304($30) \n"
" stt $f0,312($30) \n"
" ldt $f0,64($30) \n"
" ret $31,($1),1 \n"
".end save_switch_stack \n"
"\n"
".align 3 \n"
".ent restore_switch_stack \n"
"restore_switch_stack: \n"
" ldq $9,0($30) \n"
" ldq $10,8($30) \n"
" ldq $11,16($30) \n"
" ldq $12,24($30) \n"
" ldq $13,32($30) \n"
" ldq $14,40($30) \n"
" ldq $15,48($30) \n"
" ldq $26,56($30) \n"
" ldt $f30,312($30) # get saved fpcr \n"
" ldt $f0,64($30) \n"
" ldt $f1,72($30) \n"
" ldt $f2,80($30) \n"
" ldt $f3,88($30) \n"
" mt_fpcr $f30 # install saved fpcr \n"
" ldt $f4,96($30) \n"
" ldt $f5,104($30) \n"
" ldt $f6,112($30) \n"
" ldt $f7,120($30) \n"
" ldt $f8,128($30) \n"
" ldt $f9,136($30) \n"
" ldt $f10,144($30) \n"
" ldt $f11,152($30) \n"
" ldt $f12,160($30) \n"
" ldt $f13,168($30) \n"
" ldt $f14,176($30) \n"
" ldt $f15,184($30) \n"
" ldt $f16,192($30) \n"
" ldt $f17,200($30) \n"
" ldt $f18,208($30) \n"
" ldt $f19,216($30) \n"
" ldt $f20,224($30) \n"
" ldt $f21,232($30) \n"
" ldt $f22,240($30) \n"
" ldt $f23,248($30) \n"
" ldt $f24,256($30) \n"
" ldt $f25,264($30) \n"
" ldt $f26,272($30) \n"
" ldt $f27,280($30) \n"
" ldt $f28,288($30) \n"
" ldt $f29,296($30) \n"
" ldt $f30,304($30) \n"
" lda $30,"SWITCH_STACK_SIZE"($30) \n"
" ret $31,($1),1 \n"
".end restore_switch_stack \n"
" \n"
".align 3 \n"
".globl sys_vmadump \n"
".ent sys_vmadump \n"
"sys_vmadump: \n"
" ldgp $29,0($27) \n"
" bsr $1,save_switch_stack \n"
" lda $16,"SWITCH_STACK_SIZE"($30) \n"
" jsr $26,do_vmadump \n"
" bsr $1,restore_switch_stack \n"
" ret $31,($26),1 \n"
".end sys_vmadump \n"
);
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
|