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| author | H. Peter Anvin <hpa@zytor.com> | 2009-05-19 16:30:09 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-05-19 16:30:09 -0700 |
| commit | 0fa4369624b4637a7e36ed22e89a759031f08327 (patch) | |
| tree | 4aa1cf5c87d36153cee3c727d5f77498c0042983 /mtools | |
| parent | c9ad266f64f9ee81a859bdf70c1190ee0cc1bc19 (diff) | |
| download | syslinux-0fa4369624b4637a7e36ed22e89a759031f08327.tar.gz syslinux-0fa4369624b4637a7e36ed22e89a759031f08327.tar.xz syslinux-0fa4369624b4637a7e36ed22e89a759031f08327.zip | |
FAT: change DOS installer to EXE; additional 32K limit fixes
Additional fixes for the 32K limits in the installers. In the case
of the DOS installer, that means changing it from COM format to EXE
format (since COM format has a 63K hard limit); retain the name
syslinux.com for user compatibility, though (DOS doesn't care what the
extension except for pathname search; if it finds an MZ EXE header it
will use it.)
With the change to EXE means having to handle more than one segment.
Since we don't have a real DOS compiler we have to wing it a bit.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'mtools')
| -rw-r--r-- | mtools/syslinux.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/mtools/syslinux.c b/mtools/syslinux.c index 46b33f4e..8ddf42ec 100644 --- a/mtools/syslinux.c +++ b/mtools/syslinux.c @@ -134,10 +134,13 @@ int main(int argc, char *argv[]) int mtc_fd; FILE *mtc, *mtp; struct libfat_filesystem *fs; - libfat_sector_t s, *secp, sectors[65]; /* 65 is maximum possible */ + libfat_sector_t s, *secp; + libfat_sector_t *sectors; int32_t ldlinux_cluster; int nsectors; const char *errmsg; + int ldlinux_sectors, patch_sectors; + int i; int force = 0; /* -f (force) option */ int stupid = 0; /* -s (stupid) option */ @@ -247,12 +250,14 @@ int main(int argc, char *argv[]) /* * Now, use libfat to create a block map */ + ldlinux_sectors = (syslinux_ldlinux_len+SECTOR_SIZE-1) >> SECTOR_BITS; + sectors = calloc(ldlinux_sectors, sizeof *sectors); fs = libfat_open(libfat_xpread, dev_fd); ldlinux_cluster = libfat_searchdir(fs, 0, "LDLINUX SYS", NULL); secp = sectors; nsectors = 0; s = libfat_clustertosector(fs, ldlinux_cluster); - while ( s && nsectors < 65 ) { + while ( s && nsectors < ldlinux_sectors ) { *secp++ = s; nsectors++; s = libfat_nextsector(fs, s); @@ -260,11 +265,14 @@ int main(int argc, char *argv[]) libfat_close(fs); /* Patch ldlinux.sys and the boot sector */ - syslinux_patch(sectors, nsectors, stupid, raid_mode); + i = syslinux_patch(sectors, nsectors, stupid, raid_mode); + patch_sectors = (i + 511) >> 9; - /* Write the now-patched first sector of ldlinux.sys */ - xpwrite(dev_fd, syslinux_ldlinux, 512, - filesystem_offset + ((off_t)sectors[0] << 9)); + /* Write the now-patched first sectors of ldlinux.sys */ + for (i = 0; i < patch_sectors; i++) { + xpwrite(dev_fd, syslinux_ldlinux + i*512, 512, + filesystem_offset + ((off_t)sectors[i] << 9)); + } /* Move ldlinux.sys to the desired location */ if (subdir) { |