stubs.c revision 1.27
1 /* $NetBSD: stubs.c,v 1.27 2020/07/03 15:31:25 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Mark Brinicombe 21 * for the NetBSD Project. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * Routines that are temporary or do not have a home yet. 39 * 40 * Created : 17/09/94 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: stubs.c,v 1.27 2020/07/03 15:31:25 skrll Exp $"); 45 46 #include <sys/param.h> 47 48 #include <sys/conf.h> 49 #include <sys/core.h> 50 #include <sys/errno.h> 51 #include <sys/kcore.h> 52 #include <sys/msgbuf.h> 53 #include <sys/proc.h> 54 #include <sys/systm.h> 55 56 #include <uvm/uvm_extern.h> 57 58 #include <machine/cpu.h> 59 #include <machine/intr.h> 60 #include <machine/bootconfig.h> 61 #include <machine/pcb.h> 62 63 #include <arm/arm32/machdep.h> 64 #include <arm/kcore.h> 65 66 extern dev_t dumpdev; 67 68 int cpu_dump(void); 69 int cpu_dumpsize(void); 70 u_long cpu_dump_mempagecnt(void); 71 72 /* 73 * These variables are needed by /sbin/savecore 74 */ 75 uint32_t dumpmag = 0x8fca0101; /* magic number */ 76 int dumpsize = 0; /* pages */ 77 long dumplo = 0; /* blocks */ 78 79 struct pcb dumppcb; 80 81 /* 82 * This is called by main to set dumplo and dumpsize. 83 * Dumps always skip the first PAGE_SIZE of disk space 84 * in case there might be a disk label stored there. 85 * If there is extra space, put dump at the end to 86 * reduce the chance that swapping trashes it. 87 */ 88 89 void 90 cpu_dumpconf(void) 91 { 92 int nblks, dumpblks; /* size of dump area */ 93 94 if (dumpdev == NODEV) 95 return; 96 nblks = bdev_size(dumpdev); 97 if (nblks <= ctod(1)) 98 return; 99 100 dumpblks = cpu_dumpsize(); 101 if (dumpblks < 0) 102 goto bad; 103 dumpblks += ctod(cpu_dump_mempagecnt()); 104 105 /* If dump won't fit (incl. room for possible label), punt. */ 106 if (dumpblks > (nblks - ctod(1))) 107 goto bad; 108 109 /* Put dump at end of partition */ 110 dumplo = nblks - dumpblks; 111 112 /* dumpsize is in page units, and doesn't include headers. */ 113 dumpsize = cpu_dump_mempagecnt(); 114 return; 115 116 bad: 117 dumpsize = 0; 118 } 119 120 /* 121 * cpu_dump: dump the machine-dependent kernel core dump headers. 122 */ 123 int 124 cpu_dump(void) 125 { 126 int (*dump)(dev_t, daddr_t, void *, size_t); 127 char bf[dbtob(1)]; 128 kcore_seg_t *segp; 129 cpu_kcore_hdr_t *cpuhdrp; 130 phys_ram_seg_t *memsegp; 131 const struct bdevsw *bdev; 132 int i; 133 134 bdev = bdevsw_lookup(dumpdev); 135 if (bdev == NULL) 136 return ENXIO; 137 dump = bdev->d_dump; 138 139 memset(bf, 0, sizeof bf); 140 segp = (kcore_seg_t *)bf; 141 cpuhdrp = (cpu_kcore_hdr_t *)&bf[ALIGN(sizeof(*segp))]; 142 memsegp = (phys_ram_seg_t *)&bf[ ALIGN(sizeof(*segp)) + 143 ALIGN(sizeof(*cpuhdrp))]; 144 145 /* 146 * Generate a segment header. 147 */ 148 CORE_SETMAGIC(*segp, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 149 segp->c_size = dbtob(1) - ALIGN(sizeof(*segp)); 150 151 /* 152 * Add the machine-dependent header info. 153 */ 154 cpuhdrp->version = 1; 155 cpuhdrp->PAKernelL1Table = pmap_kernel_L1_addr(); 156 cpuhdrp->UserL1TableSize = 0; 157 cpuhdrp->nmemsegs = bootconfig.dramblocks; 158 cpuhdrp->omemsegs = ALIGN(sizeof(*cpuhdrp)); 159 160 /* 161 * Fill in the memory segment descriptors. 162 */ 163 for (i = 0; i < bootconfig.dramblocks; i++) { 164 memsegp[i].start = bootconfig.dram[i].address; 165 memsegp[i].size = bootconfig.dram[i].pages * PAGE_SIZE; 166 } 167 168 return dump(dumpdev, dumplo, bf, dbtob(1)); 169 } 170 171 /* 172 * cpu_dumpsize: calculate size of machine-dependent kernel core dump headers. 173 */ 174 int 175 cpu_dumpsize(void) 176 { 177 int size; 178 179 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)) + 180 ALIGN( bootconfig.dramblocks * sizeof(phys_ram_seg_t)); 181 if (roundup(size, dbtob(1)) != dbtob(1)) 182 return -1; 183 184 return 1; 185 } 186 187 188 /* 189 * cpu_dump_mempagecnt: calculate the size of RAM (in pages) to be dumped. 190 */ 191 u_long 192 cpu_dump_mempagecnt(void) 193 { 194 u_long i, n; 195 196 n = 0; 197 for (i = 0; i < bootconfig.dramblocks; i++) { 198 n += bootconfig.dram[i].pages; 199 } 200 201 return n; 202 } 203 204 /* This should be moved to machdep.c */ 205 206 extern vaddr_t memhook; /* XXX */ 207 208 /* 209 * Doadump comes here after turning off memory management and 210 * getting on the dump stack, either when called above, or by 211 * the auto-restart code. 212 */ 213 void dodumpsys(void); 214 215 void 216 dodumpsys(void) 217 { 218 const struct bdevsw *bdev; 219 daddr_t blkno; 220 int psize; 221 int error; 222 int addr; 223 int block; 224 int len; 225 vaddr_t dumpspace; 226 227 /* flush everything out of caches */ 228 cpu_dcache_wbinv_all(); 229 230 if (dumpdev == NODEV) 231 return; 232 if (dumpsize == 0) { 233 cpu_dumpconf(); 234 } 235 if (dumplo <= 0 || dumpsize == 0) { 236 printf("\ndump to dev %u,%u not possible\n", 237 major(dumpdev), minor(dumpdev)); 238 delay(5000000); 239 return; 240 } 241 printf("\ndumping to dev %u,%u offset %ld\n", 242 major(dumpdev), minor(dumpdev), dumplo); 243 244 245 bdev = bdevsw_lookup(dumpdev); 246 if (bdev == NULL || bdev->d_psize == NULL) 247 return; 248 psize = bdev_size(dumpdev); 249 printf("dump "); 250 if (psize == -1) { 251 printf("area unavailable\n"); 252 return; 253 } 254 255 if ((error = cpu_dump()) != 0) 256 goto err; 257 258 blkno = dumplo + cpu_dumpsize(); 259 dumpspace = memhook; 260 error = 0; 261 len = 0; 262 263 for (block = 0; block < bootconfig.dramblocks && error == 0; ++block) { 264 addr = bootconfig.dram[block].address; 265 for (;addr < (bootconfig.dram[block].address 266 + (bootconfig.dram[block].pages * PAGE_SIZE)); 267 addr += PAGE_SIZE) { 268 if ((len % (1024*1024)) == 0) 269 printf("%d ", len / (1024*1024)); 270 271 pmap_kenter_pa(dumpspace, addr, VM_PROT_READ, 0); 272 pmap_update(pmap_kernel()); 273 error = (*bdev->d_dump)(dumpdev, 274 blkno, (void *) dumpspace, PAGE_SIZE); 275 276 if (error) 277 goto err; 278 blkno += btodb(PAGE_SIZE); 279 len += PAGE_SIZE; 280 } 281 } 282 err: 283 switch (error) { 284 case ENXIO: 285 printf("device bad\n"); 286 break; 287 288 case EFAULT: 289 printf("device not ready\n"); 290 break; 291 292 case EINVAL: 293 printf("area improper\n"); 294 break; 295 296 case EIO: 297 printf("i/o error\n"); 298 break; 299 300 case EINTR: 301 printf("aborted from console\n"); 302 break; 303 304 case 0: 305 printf("succeeded\n"); 306 break; 307 308 default: 309 printf("error %d\n", error); 310 break; 311 } 312 printf("\n\n"); 313 delay(5000000); 314 } 315 316 /* End of stubs.c */ 317
Indexes created Mon Sep 29 21:09:56 GMT 2025