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https://gitlab.com/bztsrc/posix-uefi.git
synced 2025-07-19 17:31:02 +02:00
Option to create EFI CDROM image
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bzt
parent
4da8882887
commit
7798e28f98
4 changed files with 138 additions and 9 deletions
2
Makefile
2
Makefile
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@ -8,4 +8,4 @@ all: $(wildcard examples/*)
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@test -f $@/Makefile && make -C $@ all 2>/dev/null
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test:
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qemu-system-x86_64 -sdl -bios $(OVMF) -m 64 -enable-kvm -hda fat:rw:examples
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qemu-system-x86_64 -bios $(OVMF) -m 64 -enable-kvm -hda fat:rw:examples
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@ -31,9 +31,10 @@ programodat `EFI/BOOT/BOOTX64.EFI` néven kell bemásolni a könyvtárba, hogy m
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```
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POSIX-UEFI utils - efidsk by bztsrc@gitlab MIT
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./efidsk [-p] [-s <méret>] bekönyvtár kimenet
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./efidsk [-p|-c] [-s <méret>] bekönyvtár kimenet
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-p csak a partíciót mentse, GPT nélkül
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-c EFI CDROM mentése (ISO9660 El Torito no emulation boot catalog)
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-s <méret> a partíció méretének megadása megabájtban (alapértelmezetten 33M)
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bekönvtár ennek a könyvtárnak a tartalmából generálja
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kimenet kimenti lemezképfájl neve
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@ -31,9 +31,10 @@ compiled file under the given directory as `EFI/BOOT/BOOTX64.EFI` to get it auto
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```
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POSIX-UEFI utils - efidsk by bztsrc@gitlab MIT
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./efidsk [-p] [-s <size>] indir outfile
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./efidsk [-p|-c] [-s <size>] indir outfile
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-p save only the partition image without GPT
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-c save EFI CDROM (ISO9660 El Torito no emulation boot catalog)
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-s <size> set the size of partition in megabytes (defaults to 33M)
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indir use the contents of this directory
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outfile output image file name
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139
utils/efidsk.c
139
utils/efidsk.c
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@ -50,8 +50,9 @@ guid_t dguid, pguid;
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void usage(char *cmd)
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{
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printf("POSIX-UEFI utils - efidsk by bztsrc@gitlab MIT\r\n\r\n");
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printf("%s [-p] [-s <size>] indir outfile\r\n\r\n", cmd);
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printf("%s [-p|-c] [-s <size>] indir outfile\r\n\r\n", cmd);
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printf(" -p save only the partition image without GPT\r\n");
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printf(" -c save EFI CDROM (ISO9660 El Torito no emulation boot catalog)\r\n");
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printf(" -s <size> set the size of partition in megabytes (defaults to 33M)\r\n");
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printf(" indir use the contents of this directory\r\n");
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printf(" outfile output image file name\r\n");
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@ -420,9 +421,25 @@ void writegpt(FILE *f)
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char *name;
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if(!gpt) { fprintf(stderr, "efidsk: unable to allocate memory\r\n"); exit(1); }
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memset(gpt, 0, FIRST_PARTITION * 512);
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p = gpt + 512;
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gpt[0x1FE]=0x55; gpt[0x1FF]=0xAA;
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memcpy(gpt+0x1B8, &dguid.Data1, 4); /* WinNT disk id */
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/* MBR, EFI System Partition / boot partition. */
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gpt[0x1C0-2]=0x80; /* bootable flag */
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setint(FIRST_PARTITION+1,gpt+0x1C0); /* start CHS */
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gpt[0x1C0+2]=0xC; /* type, LBA FAT32 (0xC) */
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setint(fs_len/512,gpt+0x1C0+4); /* end CHS */
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setint(FIRST_PARTITION,gpt+0x1C0+6); /* start LBA */
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setint(fs_len/512,gpt+0x1C0+10); /* number of sectors */
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/* MBR, protective GPT entry */
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setint(1,gpt+0x1D0); /* start CHS */
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gpt[0x1D0+2]=0xEE; /* type */
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setint(FIRST_PARTITION+1,gpt+0x1D0+4); /* end CHS */
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setint(1,gpt+0x1D0+6); /* start LBA */
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setint(FIRST_PARTITION,gpt+0x1D0+10); /* number of sectors */
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/* GPT header */
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p = gpt + 512;
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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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@ -462,13 +479,119 @@ void writegpt(FILE *f)
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free(gpt);
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}
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/**
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* Write out ISO9660 El Torito "no emulation" Boot Catalog
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*/
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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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void writeetbc(FILE *f)
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{
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int i;
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time_t t;
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char isodate[128];
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unsigned char *gpt = malloc(FIRST_PARTITION * 512), *iso;
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if(!gpt) { fprintf(stderr, "efidsk: unable to allocate memory\r\n"); exit(1); }
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memset(gpt, 0, FIRST_PARTITION * 512);
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t = time(NULL);
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fat_ts = gmtime(&t);
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sprintf((char*)&isodate, "%04d%02d%02d%02d%02d%02d00",
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fat_ts->tm_year+1900,fat_ts->tm_mon+1,fat_ts->tm_mday,fat_ts->tm_hour,fat_ts->tm_min,fat_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], "EFI CDROM", 9); /* Volume Identifier */
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setinte((FIRST_PARTITION*512+fs_len+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]=fat_ts->tm_year; /* root directory create date */
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iso[175]=fat_ts->tm_mon+1;
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iso[176]=fat_ts->tm_mday;
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iso[177]=fat_ts->tm_hour;
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iso[178]=fat_ts->tm_min;
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iso[179]=fat_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], "POSIX-UEFI <HTTPS://GITLAB.COM/BZTSRC/POSIX-UEFI>", 49);
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memcpy(&iso[446], "EFIDSK", 6);
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memcpy(&iso[574], "POSIX-UEFI", 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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/* --- UEFI, Validation Entry + Initial/Default Entry + Final --- */
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iso[6144]=0x91; /* Header ID, Validation Entry, Final */
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iso[6145]=0xEF; /* Platform EFI */
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iso[6176]=0x88; /* Bootable, Initial/Default Entry */
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iso[6182]=1; /* Sector Count */
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setint(FIRST_PARTITION/4, &iso[6184]); /* 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]=fat_ts->tm_year; /* date */
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iso[8211]=fat_ts->tm_mon+1;
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iso[8212]=fat_ts->tm_mday;
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iso[8213]=fat_ts->tm_hour;
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iso[8214]=fat_ts->tm_min;
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iso[8215]=fat_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]=fat_ts->tm_year; /* date */
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iso[8245]=fat_ts->tm_mon+1;
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iso[8246]=fat_ts->tm_mday;
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iso[8247]=fat_ts->tm_hour;
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iso[8248]=fat_ts->tm_min;
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iso[8249]=fat_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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fwrite(gpt, 1, FIRST_PARTITION * 512, f);
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fwrite(fs_base, 1, fs_len, f);
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free(gpt);
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}
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/**
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* Main function
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*/
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int main(int argc, char **argv)
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{
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FILE *f;
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int i, part = 0;
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int i, part = 0, cdrom = 0;
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char *in = NULL, *out = NULL;
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/* get random GUIDs */
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@ -487,6 +610,7 @@ int main(int argc, char **argv)
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if(argv[i][0] == '-') {
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switch(argv[i][1]) {
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case 'p': part++; break;
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case 'c': cdrom++; break;
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case 's': fat_numclu = atoi(argv[++i]) * 2048; break;
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default: usage(argv[0]); break;
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}
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@ -509,9 +633,12 @@ int main(int argc, char **argv)
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fprintf(stderr, "efidsk: unable to write '%s'\r\n", out);
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return 2;
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}
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if(!part)
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writegpt(f);
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else
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if(!part) {
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if(!cdrom)
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writegpt(f);
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else
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writeetbc(f);
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} else
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fwrite(fs_base, 1, fs_len, f);
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fclose(f);
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free(fs_base);
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