GitLab

Same drill, V was being set or not preserved when it shouldn't or should be. In light of this all locations that do CMP/SUBS/ADDS involving fileptr/extent/anything ending in size or length have been reviewed and ammended where needed.
Trim some dead code.
Discard 'Version' file.

Version 2.70. Tagged as 'FileSwitch-2_70'

Retagged as FileSwitch-2_69.

In OS_Args 1 a compare was followed by a conditional store, but with files > 2G some circumstances end up with VS so the store wasn't taken.
In OS_GBPB 3/4 the assessment of how much could be done was based on adding the current fileptr to the request but not respecting the carry out. Reordered the equation to get this calculation right.
Changed a signed compare of a byte variable to use unsigned so auditing of signed condition codes is clearer.
Corrected spelling of 'openning'.
Fix copy_srchandle and copy_dsthandle to not assume handles fit in 1 byte.
Tested on a variety of contrived file sizes at the boundaries of 2G and 4G.

Version 2.69. Tagged as 'FileSwitch-2_69'

Detail:
  s/FileSwBody, s/FileSwHdr - Try getting DomainId pointer via OS_ReadSysInfo 6 before falling back on legacy address. Store result in workspace for speedy lookup.
  s/FSCommon - Use workspace DomainId pointer
  s/CtrlUtils - Update int_ConstructFullPathWithoutFSAndSpecial to not attempt to append the contents of null string pointers.
  s/FSControl - Update AppendStringIfNotNull to ignore null pointers
  s/LowLevel - Update CallFSFile_Given to not try copying from null special field strings
Admin:
  Tested on rev A2 BB-xM.
  AFAIK the null pointer bugs are all FileSwitch bugs and not bugs in whatever called FileSwitch, although I may be wrong. Not entirely sure how some of the code managed to read strings from null pointers without creating garbage filenames as a result!


Version 2.68. Tagged as 'FileSwitch-2_68'

Detail:
  s.LowLevel: STRNE should have been STRNEB. Looks like this meant that
  OS_File 5 was broken if the object name contained a filing system special
  field.
  Added ENTRY directive to permit building of GPA debug listing.
Admin:
  Built but not tested (should be a safe change).

Version 2.67. Tagged as 'FileSwitch-2_67'

Detail:
  Uses suffixed file extensions for compatiblity with both objasm and asasm.
Admin:
  Supplied by Peter Naulls, tested at ROOL

Version 2.66. Not tagged

Version 2.66. Tagged as 'FileSwitch-2_66'

More 32-bit fixes; all to do with coping with the system heap, ROM etc being in new places - these are now checked at run-time.

Version 2.65. Tagged as 'FileSwitch-2_65'

Detail:
  Code has been added to fileswitch to detect whether there is sufficient
memory for a program to execute, and report a sensible error rather than
aborting in it's initialistion code.  This implicitly relied on R12 in
the error routines, which was being corrupted.  R12 register usage has now
replaced by other safe registers.

  This was exacerbated by incorrectly formed AIF headers, such as those
generated by at least some versions of the Easy C Linker, which don't have
correct entries for the size of the data areas of the file.

Admin:
  Tested on a RPC.  The system appears to work correctly, and malformed AIF
headers cause the error to be raised without other harm.


Version 2.64. Tagged as 'FileSwitch-2_64'

Admin:
  Tested - and it doesn't result in FileCore in use errors any more.


Version 2.63. Tagged as 'FileSwitch-2_63'

Detail:
  R12 cannot be corrupted until FileSwitch is committed to starting the
    new application.  Changed code to not use R12 any more until it is
    100% sure that the application is going to be launched come what may.
Admin:
  Not built; not tested - but version 2.61 is not useful.  Should work now.


Version 2.62. Tagged as 'FileSwitch-2_62'

Detail:
  AIF headers declare how much space they are going to need in addition
    to the size of the executable on the filesystem.  This information
    is now extracted by FileSwitch to validate that the memory limit
    will not be exceeded.
Admin:
  Built.  Not tested.


Version 2.61. Tagged as 'FileSwitch-2_61'

Closing a file now allows the underlying filing system to object, preventing the file from being closed.

Detail:
  The error return from the underlying filing system wasn't being used to
prevent the fileswitch record for the open file being removed.  This resulted
in the underlying filing system not being able to prevent closure of a file
handle.  This behaviour is relied upon by PipeFS when it returns an error
from the Sleep No More UpCall.

Admin:
  Tested on RPC.  Note that the 32 bit build doesn't work on the 26 bit
desktop for no identified reason.
Version 2.60. Tagged as 'FileSwitch-2_60'

Version 2.59. Tagged as 'FileSwitch-2_59'

Detail:
    The version of Stewart's notes that I was using to convert the component
to support ObjAsm was out of date, and hence missed out a couple of sections
on converting Asm headers to C headers and tokenisation. This would only have
been picked up when building straight out of CVS. A classic case of RTLM
(read the latest manual). However, doing this work showed up a bit missing
from Stewart's notes, so it is really a case of RTLMWSHWI, or read the latest
manual when Stewart has written it). ;-)
    The makefile has been altered to ensure that the correct operations occur.

Admin:
    Not tested in a build. Checked the logs from running export headers,
libs, resources and rom phases against a pre-objasm build and verified that
all the same steps are occuring.

Version 2.58. Tagged as 'FileSwitch-2_58'

Detail:
    As above. No other changes.

Admin:
    Tested in a Lazarus build.

Version 2.57. Tagged as 'FileSwitch-2_57'

Detail:
  OS_Args 8 and 9 (ImageStampIS and IOCtl) didn't check that the file handle
passed to them was legitimate and hence would cause data aborts as they tried
to access non existant structures.

Admin:
  Not tested.  Two lines of assembler copied into each function to test
whether the file handle is valid from other similar calls.

Version 2.56. Tagged as 'FileSwitch-2_56'

Detail:
  UpCall 3 (ModifyingFile) is no longer issued by OS_File 24 (ReadBlockSize).
Admin:
  Not tested.

Version 2.55. Tagged as 'FileSwitch-2_55'

Detail:
  It is not legal for lines to end in \ unless the intention is that the
    line be rejoined.  This caused a structure member to be missing in the
    filing system header file which could have caused absolute havoc.
  Assertions are dead useful ...
Admin:
  Built.
  Required by SystemDevices 1.30 or later (and other components)

Version 2.54. Tagged as 'FileSwitch-2_54'

Should've removed StripDepnd support from Makefile, since I moved the support to MkClean.  Now removed.

Retagged as FileSwitch-2_53.

Detail:

  * No longer relies on the STB flag; instead utilises "Hdr:UserIF.<UserIF>"
    to provide the Embedded_UI flag.

    The only difference between Desktop and Embedded builds is that the
    filing system name is NOT printed on Embedded builds upon Service_Reset.

Admin:

  * Built and tested on Lazarus 32-bit build.  Code is binary identical to
    previous versions the relied on the STB flag in both the Desktop and
    Embedded cases.

  * Requires HdrSrc 1.17 or later.

Version 2.53. Tagged as 'FileSwitch-2_53'

Admin:
  Tested on a 32-bit system; untested on 26-bit, and merge with Ursula branch
  untested.

Version 2.52. Tagged as 'FileSwitch-2_52'

Detail:
  (extracted from BuffyLog)
  * Fixed problem with > 67 character filenames in OS_FSControl 26-28.
    buffer now fixed at 256 characters but lengths are now checked.

  * Paths may now be of any length without crashing fileswitch. On some
    occasions errors will be returned for long filenames (usually
    buffer overflow), but it will never crash. This does not stop other
    code (usually upcall handlers) from crashing the machine.
Admin:
  Not tested (TM). Shout at me if it doesn't work.

Version 2.51. Tagged as 'FileSwitch-2_51'

Detail:
  Full merge of Ursula branch. Path length limited to 256 if a compile-time
  check says SVCSTK is still &01C02000.

  Fix to bug introduced in RISC OS 3.70 - any errors returned by FSEntry_File
  255 were ignored.
  Some changes from RISC OS Ltd still to come.
Admin:
  Untested.

Version 2.50. Tagged as 'FileSwitch-2_50'

Detail:
  FileSwitch runs Hdr2H on its hdr.HighFSI file to export reason code
    symbols for the filing system SWIs.
Admin:
  Required by IPConfig 0.27 and later

Version 2.41. Tagged as 'FileSwitch-2_41'

Detail:
	Needed the localres alterations off the Spinner branch that had been
added since the branch was last merged.
	Added strdepend to the clean phase.

Admin:
	Built locally and on a Funai4 build machine.

Version 2.40. Tagged as 'FileSwitch-2_40'

Version 2.39. Tagged as 'FileSwitch-2_39'

Now copes with SWI OS_SynchroniseCodeAreas returning an error.  The old code preserved the V bit, but trashed r0.

Version 2.38. Tagged as 'FileSwitch-2_38'

Someone forgot to remove it !