mirror of
https://gitlab.com/bztsrc/bootboot.git
synced 2023-02-13 20:54:32 -05:00
348 lines
16 KiB
C
348 lines
16 KiB
C
/*
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* mkbootimg/gpt.c
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*
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* Copyright (C) 2017 - 2020 bzt (bztsrc@gitlab)
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* This file is part of the BOOTBOOT Protocol package.
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* @brief Generate GUID Partitioning Table (and optionally ISO9660 for hybrid images)
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*
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*/
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#include "main.h"
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guid_t efiguid = { 0xC12A7328, 0xF81F, 0x11D2, { 0xBA,0x4B,0x00,0xA0,0xC9,0x3E,0xC9,0x3B} };
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unsigned char *gpt = NULL, gpt2[512];
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unsigned long int gpt_parts[248];
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int np = 0;
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/**
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* Set integers in byte arrays
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*/
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int getint(unsigned char *ptr) { return (unsigned char)ptr[0]+(unsigned char)ptr[1]*256+(unsigned char)ptr[2]*256*256+ptr[3]*256*256*256; }
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void setint(int val, unsigned char *ptr) { memcpy(ptr,&val,4); }
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void setinte(int val, unsigned char *ptr) { char *v=(char*)&val; memcpy(ptr,&val,4); ptr[4]=v[3]; ptr[5]=v[2]; ptr[6]=v[1]; ptr[7]=v[0]; }
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/**
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* Create a GPT
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*/
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void gpt_maketable()
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{
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int i, j, k, gs = 63*512;
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unsigned long int size, ps, total, l;
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unsigned char *iso, *p;
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uint16_t *u;
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char isodate[17], key[64], *tmp, *name;
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guid_t typeguid;
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FILE *f;
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disk_align = disk_align >= 1 ? disk_align * 1024 : 512;
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es = disk_align/512 > 128 ? disk_align/512 : 128;
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esiz = ((esp_size + disk_align - 1) & ~(disk_align - 1))/512;
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tsize = (unsigned long int)disk_size * 1024UL * 1024UL;
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total = (2*es + esiz) * 512;
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memset(gpt_parts, 0, sizeof(gpt_parts));
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for(np = 1; np < 248; np++) {
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sprintf(key, "partitions.%d.%s", np, "type");
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tmp = json_get(json, key);
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if(!tmp || !*tmp) break;
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getguid(tmp, &typeguid);
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for(i = 0; fsdrv[i].name; i++)
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if(fsdrv[i].type.Data1 && !strcmp(tmp, fsdrv[i].name)) { memcpy(&typeguid, &fsdrv[i].type, sizeof(guid_t)); break; }
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free(tmp);
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if(!typeguid.Data1 && !typeguid.Data2 && !typeguid.Data3 && !typeguid.Data4[0]) {
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sprintf(key, "partitions.%d.%s", np, "typeguid");
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tmp = json_get(json, key);
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if(tmp && *tmp) { getguid(tmp, &typeguid); free(tmp); }
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}
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if(!typeguid.Data1 && !typeguid.Data2 && !typeguid.Data3 && !typeguid.Data4[0]) {
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fprintf(stderr,"mkbootimg: partition #%d %s. %s:\r\n", np+1, lang[ERR_TYPE], lang[ERR_ACCEPTVALUES]);
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for(i = 0; fsdrv[i].name; i++)
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if(fsdrv[i].type.Data1) {
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fprintf(stderr," \"%08X-%04X-%04X-%02X%02X-",fsdrv[i].type.Data1,fsdrv[i].type.Data2,fsdrv[i].type.Data3,
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fsdrv[i].type.Data4[0],fsdrv[i].type.Data4[1]);
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for(j = 2; j < 8; j++) fprintf(stderr,"%02X",fsdrv[i].type.Data4[j]);
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fprintf(stderr,"\" / \"%s\"\r\n",fsdrv[i].name);
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}
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fprintf(stderr," ...%s \"%%08X-%%04X-%%04X-%%04X-%%12X\"\r\n",lang[ERR_GUIDFMT]);
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exit(1);
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}
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sprintf(key, "partitions.%d.%s", np, "name");
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tmp = json_get(json, key);
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if(!tmp || !*tmp) { fprintf(stderr,"mkbootimg: partition #%d %s\r\n", np+1, lang[ERR_NONAME]); exit(1); }
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free(tmp);
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sprintf(key, "partitions.%d.%s", np, "size");
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tmp = json_get(json, key); if(tmp) { size = atoi(tmp) * 1024UL * 1024UL; } else { size = 0; } free(tmp);
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sprintf(key, "partitions.%d.%s", np, "file");
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tmp = json_get(json, key);
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if(!tmp || !*tmp) ps = 0; else {
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f = fopen(tmp, "rb");
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if(!f) { fprintf(stderr,"mkbootimg: partition #%d %s %s\r\n",np+1,lang[ERR_PARTIMG],tmp); exit(1); }
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fseek(f, 0L, SEEK_END);
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ps = ftell(f);
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fclose(f); free(tmp);
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}
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gpt_parts[np] = ((size > ps ? size : ps) + disk_align-1) & ~(disk_align-1);
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total += gpt_parts[np];
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}
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if(total > tsize) tsize = total;
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gpt = malloc(es*512);
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if(!gpt) { fprintf(stderr,"mkbootimg: %s\r\n",lang[ERR_MEM]); exit(1); }
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memset(gpt,0,es*512);
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/* MBR stage 1 loader */
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if(esp_bbs) {
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esp_bbs += es;
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setint(esp_bbs, esp+0x1B0);
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memcpy(gpt, esp, 11);
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memcpy(gpt + 0x5A, esp + 0x5A, 0x1B8 - 0x5A);
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}
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gpt[0x1FE]=0x55; gpt[0x1FF]=0xAA;
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/* WinNT disk id */
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memcpy(gpt+0x1B8, &diskguid.Data1, 4);
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/* generate PMBR partitioning table */
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j=0x1C0;
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/* MBR, EFI System Partition / boot partition. */
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/* Don't use 0xEF as type, that's just plain stupidity in the spec. There are two firmware:
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* 1) GPT-aware: it will read the ESP from the GPT
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* 2) non-GPT-aware: it won't recognize neither GPT ESP, nor type 0xEF either...
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* So just use ids for plain FAT partitions, that way we have chance for backward compatibility,
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* and also Raspberry Pi doesn't work otherwise. */
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gpt[j-2]=0x80; /* bootable flag */
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setint(es+1,gpt+j); /* start CHS */
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gpt[j+2]=boot_fat == 16 ? 0xE : 0xC; /* type, LBA FAT16 (0xE) or FAT32 (0xC) */
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setint(esiz+es,gpt+j+4); /* end CHS */
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setint(es,gpt+j+6); /* start LBA */
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setint(esiz,gpt+j+10); /* number of sectors */
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j+=16;
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/* MBR, protective GPT entry */
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/* according to the spec, it should cover the entire disk, but
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* 1) that's just stupid, you can't do that with larger disks
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* 2) all partitioning tools are compaining about overlaping partitions... */
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setint(1,gpt+j); /* start CHS */
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gpt[j+2]=0xEE; /* type */
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setint(gs/512+1,gpt+j+4); /* end CHS */
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setint(1,gpt+j+6); /* start LBA */
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setint(gs/512,gpt+j+10); /* number of sectors */
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p = gpt + 512;
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/* GPT header */
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memcpy(p,"EFI PART",8); /* magic */
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setint(1,p+10); /* revision */
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setint(92,p+12); /* size */
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setint(1,p+24); /* primary LBA */
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setint(tsize/512UL-1,p+32); /* secondary LBA */
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setint(64,p+40); /* first usable LBA */
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setint(tsize/512UL-1,p+48); /* last usable LBA */
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memcpy(p+56,&diskguid,sizeof(guid_t)); /* disk UUID */
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setint(2,p+72); /* partitioning table LBA */
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setint(248,p+80); /* number of entries */
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setint(128,p+84); /* size of one entry */
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p += 512;
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/* GPT, EFI System Partition (ESP, /boot) */
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l = esiz+es-1;
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memcpy(p, &efiguid, sizeof(guid_t)); /* entry type */
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diskguid.Data1++;
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memcpy(p+16, &diskguid, sizeof(guid_t)); /* partition UUID */
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setint(es,p+32); /* start LBA */
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setint(l,p+40); /* end LBA */
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name = "EFI System Partition"; /* name */
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for(i = 0; name[i]; i++) p[56+i*2] = name[i];
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p += 128;
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for(k = 1; k < np; k++) {
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sprintf(key, "partitions.%d.%s", k, "type");
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tmp = json_get(json, key);
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if(!tmp || !*tmp) break;
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getguid(tmp, &typeguid);
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for(i = 0; fsdrv[i].name; i++)
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if(fsdrv[i].type.Data1 && !strcmp(tmp, fsdrv[i].name)) { memcpy(&typeguid, &fsdrv[i].type, sizeof(guid_t)); break; }
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free(tmp);
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memcpy(p, &typeguid, sizeof(guid_t)); /* entry type */
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diskguid.Data1++;
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memcpy(p+16, &diskguid, sizeof(guid_t)); /* partition UUID */
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setint(l+1,p+32); /* start LBA */
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l += gpt_parts[k] / 512;
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setint(l,p+40); /* end LBA */
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sprintf(key, "partitions.%d.%s", k, "name"); tmp = name = json_get(json, key);
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u = (uint16_t*)(p+56);
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for(i = 0; i < 35 && *name; name++, i++) { /* name, utf8 to unicode16 */
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u[i] = *name;
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if((*name & 128) != 0) {
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if(!(*name & 32)) { u[i] = ((*name & 0x1F)<<6)|(name[1] & 0x3F); name += 1; } else
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if(!(*name & 16)) { u[i] = ((*name & 0xF)<<12)|((name[1] & 0x3F)<<6)|(name[2] & 0x3F); name += 2; } else
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if(!(*name & 8)) { u[i] = ((*name & 0x7)<<18)|((name[1] & 0x3F)<<12)|((name[2] & 0x3F)<<6)|(name[3] & 0x3F); name += 3; }
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else u[i] = 0;
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}
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}
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p += 128;
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}
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/* calculate checksums */
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/* partitioning table */
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setint(crc32(0,gpt+1024,gpt[512+80]*128),gpt+512+88);
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/* header */
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i=getint(gpt+512+12); /* size of header */
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setint(crc32(0,gpt+512,i),gpt+512+16);
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/* secondary header */
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memcpy(gpt2, gpt+512, 512);
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i=getint(gpt+512+32);
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setint(getint(gpt+512+24),gpt2+32); /* secondary lba */
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setint(i,gpt2+24); /* primary lba */
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setint((tsize-gs)/512,gpt2+72); /* partition lba */
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i=getint(gpt+512+12); /* size of header */
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setint(0,gpt2+16); /* calculate with zero */
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setint(crc32(0,gpt2,i),gpt2+16);
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/* ISO9660 cdrom image part */
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if(iso9660) {
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/* from the UEFI spec section 12.3.2.1 ISO-9660 and El Torito
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"...A Platform ID of 0xEF indicates an EFI System Partition. The Platform ID is in either the Section
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Header Entry or the Validation Entry of the Booting Catalog as defined by the “El Torito”
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specification. EFI differs from “El Torito” “no emulation” mode in that it does not load the “no
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emulation” image into memory and jump to it. EFI interprets the “no emulation” image as an EFI
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system partition."
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* so we must record the ESP in the Boot Catalog, that's how UEFI locates it */
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if(esp_bbs%4!=0) {
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/* this should never happen, but better check */
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fprintf(stderr,"mkbootimg: %s (LBA %d, offs %x)\n",lang[ERR_ST2ALIGN], esp_bbs, esp_bbs*512);
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exit(3);
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}
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sprintf((char*)&isodate, "%04d%02d%02d%02d%02d%02d00",
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ts->tm_year+1900,ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
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iso = gpt + 16*2048;
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/* 16th sector: Primary Volume Descriptor */
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iso[0]=1; /* Header ID */
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memcpy(&iso[1], "CD001", 5);
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iso[6]=1; /* version */
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for(i=8;i<72;i++) iso[i]=' ';
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memcpy(&iso[40], "BOOTBOOT_CD", 11); /* Volume Identifier */
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setinte((65536+esp_size+2047)/2048, &iso[80]);
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iso[120]=iso[123]=1; /* Volume Set Size */
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iso[124]=iso[127]=1; /* Volume Sequence Number */
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iso[129]=iso[130]=8; /* logical blocksize (0x800) */
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iso[156]=0x22; /* root directory recordsize */
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setinte(20, &iso[158]); /* root directory LBA */
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setinte(2048, &iso[166]); /* root directory size */
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iso[174]=ts->tm_year; /* root directory create date */
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iso[175]=ts->tm_mon+1;
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iso[176]=ts->tm_mday;
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iso[177]=ts->tm_hour;
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iso[178]=ts->tm_min;
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iso[179]=ts->tm_sec;
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iso[180]=0; /* timezone UTC (GMT) */
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iso[181]=2; /* root directory flags (0=hidden,1=directory) */
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iso[184]=1; /* root directory number */
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iso[188]=1; /* root directory filename length */
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for(i=190;i<813;i++) iso[i]=' '; /* Volume data */
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memcpy(&iso[318], "BOOTBOOT <HTTPS://GITLAB.COM/BZTSRC/BOOTBOOT>", 45);
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memcpy(&iso[446], "MKBOOTIMG", 9);
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memcpy(&iso[574], "BOOTABLE OS", 11);
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for(i=702;i<813;i++) iso[i]=' '; /* file descriptors */
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memcpy(&iso[813], &isodate, 16); /* volume create date */
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memcpy(&iso[830], &isodate, 16); /* volume modify date */
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for(i=847;i<863;i++) iso[i]='0'; /* volume expiration date */
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for(i=864;i<880;i++) iso[i]='0'; /* volume shown date */
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iso[881]=1; /* filestructure version */
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for(i=883;i<1395;i++) iso[i]=' '; /* file descriptors */
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/* 17th sector: Boot Record Descriptor */
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iso[2048]=0; /* Header ID */
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memcpy(&iso[2049], "CD001", 5);
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iso[2054]=1; /* version */
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memcpy(&iso[2055], "EL TORITO SPECIFICATION", 23);
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setinte(19, &iso[2048+71]); /* Boot Catalog LBA */
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/* 18th sector: Volume Descritor Terminator */
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iso[4096]=0xFF; /* Header ID */
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memcpy(&iso[4097], "CD001", 5);
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iso[4102]=1; /* version */
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/* 19th sector: Boot Catalog */
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/* --- BIOS, Validation Entry + Initial/Default Entry --- */
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iso[6144]=1; /* Header ID, Validation Entry */
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iso[6145]=0; /* Platform 80x86 */
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iso[6172]=0xaa; /* magic bytes */
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iso[6173]=0x55;
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iso[6174]=0x55;
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iso[6175]=0xaa;
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iso[6176]=0x88; /* Bootable, Initial/Default Entry */
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iso[6182]=4; /* Sector Count */
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setint(es/4, &iso[6184]); /* Boot Record LBA */
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/* --- UEFI, Final Section Header Entry + Section Entry --- */
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iso[6208]=0x91; /* Header ID, Final Section Header Entry */
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iso[6209]=0xEF; /* Platform EFI */
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iso[6210]=1; /* Number of entries */
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iso[6240]=0x88; /* Bootable, Section Entry */
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setint(es/4, &iso[6248]); /* ESP Start LBA */
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/* 20th sector: Root Directory */
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/* . */
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iso[8192]=0x21 + 1; /* recordsize */
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setinte(20, &iso[8194]); /* LBA */
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setinte(2048, &iso[8202]); /* size */
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iso[8210]=ts->tm_year; /* date */
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iso[8211]=ts->tm_mon+1;
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iso[8212]=ts->tm_mday;
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iso[8213]=ts->tm_hour;
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iso[8214]=ts->tm_min;
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iso[8215]=ts->tm_sec;
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iso[8216]=0; /* timezone UTC (GMT) */
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iso[8217]=2; /* flags (0=hidden,1=directory) */
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iso[8220]=1; /* serial */
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iso[8224]=1; /* filename length */
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iso[8225]=0; /* filename '.' */
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/* .. */
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iso[8226]=0x21 + 1; /* recordsize */
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setinte(20, &iso[8228]); /* LBA */
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setinte(2048, &iso[8236]); /* size */
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iso[8244]=ts->tm_year; /* date */
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iso[8245]=ts->tm_mon+1;
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iso[8246]=ts->tm_mday;
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iso[8247]=ts->tm_hour;
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iso[8248]=ts->tm_min;
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iso[8249]=ts->tm_sec;
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iso[8250]=0; /* timezone UTC (GMT) */
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iso[8251]=2; /* flags (0=hidden,1=directory) */
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iso[8254]=1; /* serial */
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iso[8258]=1; /* filename length */
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iso[8259]='\001'; /* filename '..' */
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/* BOOTBOOT.TXT */
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iso[8260]=0x21+14; /* recordsize */
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setinte(21, &iso[8262]); /* LBA */
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setinte(133, &iso[8270]); /* size */
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iso[8278]=ts->tm_year; /* date */
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iso[8279]=ts->tm_mon+1;
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iso[8280]=ts->tm_mday;
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iso[8281]=ts->tm_hour;
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iso[8282]=ts->tm_min;
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iso[8283]=ts->tm_sec;
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iso[8284]=0; /* timezone UTC (GMT) */
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iso[8285]=0; /* flags (0=hidden,1=directory) */
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iso[8288]=1; /* serial */
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iso[8292]=14; /* filename length */
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memcpy(&iso[8293], "BOOTBOOT.TXT;1", 14);
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/* 21th sector: contents of BOOTBOOT.TXT */
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memcpy(&iso[10240], "BOOTBOOT hybrid GPT / CDROM Image\r\n\r\nBootable as\r\n"
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" - CDROM (El Torito, UEFI)\r\n"
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" - USB stick (BIOS, UEFI)\r\n"
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" - SD card (Raspberry Pi 3+)", 133);
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}
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}
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