Prior to this commit the first cluster specified from the last
compared directory entry would be used if the file is not found.
Fix the wrong (boot.asm) or missing (oemboot.asm) jump to the
error handler so that on file not found an error is displayed.
Reference: https://sourceforge.net/p/freedos/bugs/97/
"Bugs in FAT12/16 boot sector loaders if file not found"
This commit fixes the most crucial bug of this 2012-09-27 report.
After comparison with DR-DOS 7.01 and MS-DOS 6.22 over at Dosemu2 it
was seen that rmdir of a directory having the _A_RDONLY bit set should
succeed. This patch makes that change.
For reference the test report can be found in the fdpp issue
https://github.com/dosemu2/fdpp/issues/161. An identical patch has
been applied there.
Reference: https://hg.ulukai.org/ecm/instsect/file/33218c729b43/instsect.asm#l1257
lDOS's instsect recently started to default to checking
the filesystem ID string in order to validate that the
boot sector loader to write matches the detected FS.
Using the /S=filename option or building instsect to
include the FreeDOS kernel's loaders would require use
of the /SN switch without this commit.
In addition, boot.asm and oemboot.asm are made to check
that exactly one of the ISFAT12 and ISFAT16 defs is
defined so as to select the FS. Prior to this commit
using both or neither def would silently result in a
broken loader.
Reference: https://www.bttr-software.de/forum/forum_entry.php?id=16934
The SBC188 video ROM-BIOS handling returns with al=0Ah (LF)
upon interrupt 10h function 0Eh calls that scroll the screen.
This made the FAT12 boot loader crash when booting FreeDOS
off a 1440 KiB diskette. While a fix is expected from their
side too, hardening the loader too is the right thing to do.
With the way this fix is implemented by this commit, it only
needs one additional byte for the loader. The error message
changes from "Error!." to just "Error!", other than
that the behaviour is the same.
The FAT32 loaders already used zero-terminated strings and
thus were not affected by the dependence.
correct I186 and I386 macros definition to work with all Open Watcom toolchain versions
command line definition macro has "1" value but in header file it is defined as blank value
anyway I86/I186/I386 macros usage is not transparent, it is definition duplicity in header file and on command line
it is wrong solution even if it works on most of compilers (command line macro re-definition is hidden)
Watcom compiler is downloaded and extracted if necessary. On Travis this
will be always, but if you build locally multiple times using
./travis_build, it will use the previous watcom installation.
[fixes#18]
This changes the interface between reloc_call_int2f_handler
(int2f.asm) and int2F_12_handler( ) (inthndlr.c) so that
- int2F_12_handler( ) will not try to output values to its
caller by passing "back" input parameter values
- reloc_call_int2f_handler will switch to an internal
stack before calling int2F_12_handler( ), so that SS ==
DGROUP as expected by the latter.
This partly addresses https://github.com/FDOS/kernel/issues/11 .
(The call to syscall_MUX14( ) in int2f.asm seems to have
similar issues, and should probably also be updated.)
Currently the sed trickery for gcc is only setup on the all target, but
if we want to do `make COMPILER=gcc clean all` the clean will fail.
Setup and remove the GNUmakefiles for each main target.
DOS provides the interrupt 2f/12xx functions for use by
filesystem redirectors in order that they do not need to access
structures and variables using undocumented methods. Interrupt
2f/1217 is a function used by a redirector to get the CDS entry
corresponding to a drive without iterating the CDS array found
via SYSVARS LOL.
FreeDOS currently validates the flags in CDS entry before
deciding whether to return the entry to the caller. This behaviour
prevents a redirector receiving the CDS entry corresponding to
an as yet unassigned drive so preventing any new drive mapping.
I've tested the following flavours of DOS and only FreeDOS
does this.
# DOS variants returning new CDS entries okay
DR-DOS
6.00-930319 7.00 7.01 7.02-971119 7.02-980123 7.03 8.00
MS-DOS
3.10 3.20 3.21 3.30-Nec 3.30 3.31 4.01 5.00 6.00 6.20 6.21 6.22
7.00 7.10
PC-DOS
3.00-Compaq 3.00 3.10-850307 3.10-850422 3.10-Compaq 3.20-851230
3.20-860221 3.30 3.31-Compaq 4.00 4.01 5.00 5.02 6.10 6.30 7.00
7.10 7.2K
# DOS variants that return error rather than new CDS entry
FR-DOS
1.00 1.10 1.20
This patch introduces an unvalidated version of get_cds() and calls
it only for the int2f/1217h call, other uses remain as before.
- Upon creation, initialize the PSP version field
to os_setver_minor / os_setver_major.
- When calling Function 30h, return the contents
of the current PSP's version field to the caller.
* Move the text of the GPLv2 to the top-level directory
This to make it easier to find, it also allows to be autodetectable by github and other automated tools. Note: this is not a license change, the FreeDOS kernel is already released under the GPL v2.
