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add fat32 support. fix some mount bugs.

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okuji committed 1999-08-25 07:46:59 +00:00
1 parent 25de0c4bba
commit 29286d8365
8 files changed
+81 -15
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stage2/fat.h
+12 -2
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@@ -43,10 +43,20 @@
#define FAT_BPB_RESERVED_SECTORS(bpb) \
(*((unsigned short *) (((int)bpb) + 14)))
#define FAT_BPB_FAT_SECTORS(bpb) \
#define FAT_BPB_FAT_SECTORS_16(bpb) \
(*((unsigned short *) (((int)bpb) + 22)))
#define FAT_BPB_FAT_SECTORS_32(bpb) \
(*((unsigned long *) (((int)bpb) + 36)))
#define FAT_BPB_IS_FAT32(bpb) \
(FAT_BPB_FAT_SECTORS_16(bpb) == 0)
#define FAT_BPB_FAT_SECTORS(bpb) \
(FAT_BPB_FAT_SECTORS_16(bpb) \
? FAT_BPB_FAT_SECTORS_16(bpb) : FAT_BPB_FAT_SECTORS_32(bpb))
#define FAT_BPB_FAT_START(bpb) FAT_BPB_RESERVED_SECTORS(bpb)
#define FAT_BPB_ROOT_DIR_CLUSTER(bpb) \
(*((unsigned long *) (((int)bpb) + 44)))
/*
* This appears to be a MAJOR kludge!! Don't use it if possible...
*/
@@ -108,6 +118,6 @@
& ((*((unsigned char *) entry)) != 0xE5) \
& !(FAT_DIRENTRY_ATTRIB(entry) & FAT_ATTRIB_NOT_OK_MASK) )
#define FAT_DIRENTRY_FIRST_CLUSTER(entry) \
(*((unsigned short *) (entry+26)))
((*((unsigned short *) (entry+26)))+(*((unsigned short *) (entry+20)) << 16))
#define FAT_DIRENTRY_FILELENGTH(entry) \
(*((unsigned long *) (entry+28)))