GitLab

Detail:
  * No longer uses aasm to build h.swis.
  * (Only) compatible with new C compilers: assumes const static data is
    placed in separate read-only areas, and suitable command-line switch
    is used to ensure that library static data is never placed in a zero-
    init area.
  * Stack extension code now thread-safe.
  * Heap thread-safety code (in clib) now uses SWP instruction test results
    from stack extension code (in kernel) - as a side effect, the exported
    symbol _swp_available now exists, if you need to use it elsewhere.
  * Slightly closer to having top-bit-set heap addresses working.
Admin:
  Tested in a Tungsten build, and with Customer W's test suite.

Version 5.48. Tagged as 'RISC_OSLib-5_48'

Detail:
  * _kernel_irqs_disabled() is included in ansilib build, now needed for
    ARM 2 SWP replacement in c.alloc
  * _kernel_entrypoint() for ansilib now initialises relocation offsets in
    root stack chunk, necessary if linking with -zm object code
  * system() implementation now calls DDEUtils_FlushCL if starting a
    short command line - necessary in case previous system() call was a
    long command line directed at a DDE-unaware application
Admin:
  Ansilib changes tested, DDE change not expected to cause problems.

Version 5.47. Not tagged

Detail:
  * Implemented the thread-safety mutex macros for the user mode heap.
  * Created ansilibm, a version of ansilib suitable for building modules.
  * Fixed an overestimation of the size of the workspace passed to
    SharedCLibrary_LibInitModule[APCS_32] by the stubs.
  * Fixed bug in SharedCLibrary_LibInitModule[APCS_32] regarding handling of
    non-reentrant modules - if module code was at a higher address than the
    module data, then all the intervening data would be pointlessly copied
    back over itself with no allowance for volatility.
  * Removed the bsearch source file, since it was only required for APCS-A
    which the library has not supported since the year 2000, and which the
    compiler is now no longer able to build.
Admin:
  ansilibm builds working modules, but thread safety has not been
  extensively tested.

Version 5.47. Tagged as 'RISC_OSLib-5_47'

* _Exit() added.
* Lots of new <math.h> functions (acosh, asinh, atanh, exp2, expm1,
  ilogb, log1p, log2, logb, scalbn, scalbln, cbrt, erf, erfc,
  lgamma, tgamma, nexttoward, fmaf). Float and long double forms
  of every function added; long double forms are included as another
  library object in the stubs rather than the shared library, as they
  just branch to the double form.
* Subnormal/NaN/infinity cases in various <math.h> functions improved.
* Added <tgmath.h>.
* Headers brought into line with CC 5.54.
* RMEnsures added to C library initialisation to try to load minimum
  CallASWI, FPEmulator, CLib. No errors reported if load fails.
* A few pointless inter-file dependencies removed to reduce minimum
  size of included ANSILib.

Version 5.46. Tagged as 'RISC_OSLib-5_46'

PCI added to swis.h
alloc.c updated to handle bigger slots (new code merged from ARM libraries)
Various 32-bit fixes for backtracing, and general trap handling.
Polite "Application is not 32-bit compatible" message.
Headers <stdint.h> and <inttypes.h> fixed to work in non-C99 mode.
txt changed to do new-style Delete behaviour

Version 5.44. Tagged as 'RISC_OSLib-5_44'

* Added two new library chunks, 4 and 5, which contain extensions to the kernel and C library respectively. These have no static data associated with them, just being extensions of the stub tables. The reason for this is to minimise wasted space in programs that don't use the C99 facilities; o.stubs is now a library split into 3 pieces - basic kernel and CLib, extra kernel and extra

  CLib; only the bits a program needs get included.

* Previous extensions to the C library stubs revoked - they now stop at _swix;
  all the new C99 functions now live in chunk 4. Anyone using those new
  functions should relink with new stubs and ensure this C library version.

* printf/scanf now support 64-bit types through "ll" and "j" length modifiers.

* Run-time support for VLAs (__rt_allocauto and __rt_freeauto) added. No
  attempt is currently made to clear up on longjmp or to cope with someone
  changing the kernel allocator while a VLA is active. These would be a
  future enhancement.

* Added complete 64-bit run-time support (48 functions) to kernel library;
  these functions are compatible with the ones used by the ARM ADS. Many of
  the simpler functions will not normally be used by the compiler, as it
  will generate inline code. There is scope for improvement by switching
  in MULL and CLZ-using forms of multiply and divide when possible.

* llabs and lldiv added to C library.

* Header files corrected in a few areas, and changed to match the C compiler.
  <stdint.h> and <stdbool.h> now require the compiler to be in C99 mode
  (as detected using __STDC_VERSION__).


Version 5.41. Tagged as 'RISC_OSLib-5_41'

  Aborts now give standard error messages (Abort on Data Transfer at... etc)
  *ShowRegs now filled in after aborts
  assert(), abort(), "free failed" and standard signal handlers now use Wimp
    error boxes if in the desktop
  Postmortem button on error boxes to view the postmortem

Also, x$multiply, x$divide, __rt_sdiv, x$remainder, x$udivide, __rt_udiv and
x$uremainder optimised.

Version 5.35. Tagged as 'RISC_OSLib-5_35'

Detail:
  * One check for 26-bit mode wan't being made, leading to the runtime reporting
    'Uncaught trap:' when a trap should have been catching the abort.  This
    prevented signal handlers from trapping some aborts.
  * When an abort was occuring in SVC mode, the stack wasn't being flattened,
    resulting in all sorts of nasty things when you tried to carry on from a
    signal handler (probably the main reason why you ever see 'No stack for trap
    handler'). SVC and undefined stacks are now flattened.  Further work should
    be done to restore the state of the OS after an abort, but this probably
    requires a new OS call to tidy itself up adequately.
Admin:
  Built 26-bit versions of the library with new 32-bit compatible entry points and checked abort handling with both sharedclibrary and ansilib.

Version 5.22. Tagged as 'RISC_OSLib-5_22'

Second attempt at getting 32-bit overlay manager to work.

Version 5.21. Tagged as 'RISC_OSLib-5_21'

Detail:
  This code would only work in 26-bit modes, since it stored the output
    flags using STR pc, [sp, #4*4]!.  When {CONFIG} is 32, it stores the
    CPSR instead.
Admin:
  Tested in 32-bit Lazarus build - this fixes the RCMMDriver stiffing
    (because it sits with interrupts off waiting for the C flag to be
    set on exit from an OS_Byte call it calls through _swix)

Version 5.19. Tagged as 'RISC_OSLib-5_19'

Detail:
  _kernel_setenv(varname, NULL) should delete the variables.  It now does.
Admin:
  Tested in module.

Version 5.18. Tagged as 'RISC_OSLib-5_18'

* Correction to static base location in modulewrap - was affecting some
  DSL 4000 video software.

Version 5.15. Tagged as 'RISC_OSLib-5_15'

OS_ReadSysInfo 6.

Version 5.08. Tagged as 'RISC_OSLib-5_08'

Version 5.07. Tagged as 'RISC_OSLib-5_07'

Version 5.06. Tagged as 'RISC_OSLib-5_06'

ROM patches.
fp and lr are now set correctly before calling a SWI. This allows much better
recovery if the SWI aborts or generates an error.

Version 4.95. Tagged as 'RISC_OSLib-4_95'

StrongARMfudge flag removed.
StrongARM compatibility set according to AMBKernel flag in Hdr:RISCOS
strftime %U and %W specifiers fixed for week 0.

Version 4.89. Tagged as 'RISC_OSLib-4_89'