60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* radare2 - LGPL - Copyright 2015 - pancake */
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/* XXX: maybe this should be implemented in RBin */
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/* we need to extract the code section and get offset flags */
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typedef struct {
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ut8 flag; // 0x80 if active
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ut8 start_head;
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ut8 start_sector;
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ut8 start_cylinder;
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ut8 type;
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ut8 end_head;
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ut8 end_sector;
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ut8 end_cylinder;
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ut32 start; // sector count (starting from 0)
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ut32 length; // in sector
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} __attribute__ ((packed)) DOS_ENTRY;
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typedef struct {
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ut8 code[446]; // code
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DOS_ENTRY entries[4];
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ut16 aa55; // the signature
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} __attribute__ ((packed)) MBR;
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static int fs_part_dos(void *disk, void *ptr, void *closure) {
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int i;
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MBR mbr;
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RFS *fs = (RFS*)disk;
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RFSPartition *par = NULL;
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RFSPartitionIterator iterate = (RFSPartitionIterator)ptr;
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RList *list = (RList*)closure;
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memset (&mbr, 0, sizeof (mbr));
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fs->iob.read_at (fs->iob.io, 0, (ut8*)&mbr, sizeof (mbr));
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if (mbr.aa55 != 0xaa55) {
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eprintf ("Invalid DOS signature at 0x%x\n",
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(int)r_offsetof (MBR, aa55));
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return 0;
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}
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for (i=0; i<4; i++) {
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ut64 addr, aend;
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DOS_ENTRY *e = &mbr.entries[i];
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if (e->type != 0) {
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//int is_active = (e->flag == 0x80);
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addr = e->start;
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addr *= 512;
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aend = 0; //e->start;
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aend += e->length;
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aend *= 512;
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par = r_fs_partition_new (i, addr, aend);
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par->index = 0;
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par->type = e->type;
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iterate (disk, par, list);
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} else {
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// TODO: make deleted entries accessible?
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}
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}
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return 0;
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}
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