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Commit Graph

30 Commits

Author SHA1 Message Date
Polluks
9563541870 crt0 clean-up 2020-11-29 18:08:33 +01:00
Oliver Schmidt
d8c31cf1d3 Renamed RAM to MAIN for all disk based targets.
The name RAM doesn't make much sense in general for a memeory area because i.e. the zero page is for sure RAM but is not part of the memory area named RAM.

For disk based targets it makes sense to put the disk file more into focus and here MAIN means the main part of the file - in contrast to some header.

Only for ROM based targets the name RAM is kept as it makes sense to focus on the difference between RAM and ROM.
2016-03-07 01:28:55 +01:00
Oliver Schmidt
419eb700b5 Renamed INITBSS to INIT and INIT to ONCE.
The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name.

Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.
2016-03-06 21:27:19 +01:00
Oliver Schmidt
0ee9b2e446 Changed run location of INIT segment.
So far the INIT segment was run from the later heap+stack. Now the INIT segment is run from the later BSS. The background is that so far the INIT segment was pretty small (from $80 to $180 bytes). But upcoming changes will increase the INIT segment in certain scenarios up to ~ $1000 bytes. So programs with very limited heap+stack might just not been able to move the INIT segment to its run location. But moving the INIT segment to the later BSS allows it to occupy the later BSS+heap+stack.

In order to allow that the constructors are _NOT_ allowed anymore to access the BSS. Rather they must use the DATA segment or the new INITBSS segment. The latter isn't cleared at any point so the constructors may use it to expose values to the main program. However they must make sure to always write the values as they are not pre-initialized.
2015-10-14 22:52:09 +02:00
Greg King
c7969a78b0 Refined the comments in the target start-up files.
Fixed typo errors.  Made the comments consistent across all those files.
2014-08-24 10:10:20 -04:00
Oliver Schmidt
85885001b1 Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 13:57:12 +02:00
ol.sc
7c9171ee87 Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
ol.sc
59e96ef740 Turned the 'ST' status byte into a symbol resolved by the linker in order to allow to use it from code living in the 'cbm' directory.
Moved getdevice.s from 'c64'/'c128' to 'cbm' making use of the new 'ST' setup.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5834 b7a2c559-68d2-44c3-8de9-860c34a00d81
2012-09-30 18:20:15 +00:00
uz
5b659547b8 Removed the jump to RESTOR on exit for all the CBM platforms.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5355 b7a2c559-68d2-44c3-8de9-860c34a00d81
2012-01-01 19:58:31 +00:00
uz
81cfbe06c6 Changed the startup module and the linker config for the Commodore VIC to use
the common loadaddr and exehdr modules.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4874 b7a2c559-68d2-44c3-8de9-860c34a00d81
2010-11-17 13:35:43 +00:00
ol.sc
d1f5b74f01 Now that we reduce the size of the RAM memory area by the stacksize in the linker configuration we need to add the stacksize to end of the RAM area when setting the initial stack pointer in the startup code.
git-svn-id: svn://svn.cc65.org/cc65/trunk@4822 b7a2c559-68d2-44c3-8de9-860c34a00d81
2010-10-02 10:37:20 +00:00
uz
7e2a24176f Replaced $30 by literal '0' for better readability.
git-svn-id: svn://svn.cc65.org/cc65/trunk@4513 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-12-10 22:12:24 +00:00
uz
13698871cb Removed the call to CLRCH in the startup code.
git-svn-id: svn://svn.cc65.org/cc65/trunk@4512 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-12-10 21:22:17 +00:00
uz
60bc009991 * Moved the BASIC stub that calls the compiled program into it's own segment
named EXEHDR.
* Renamed BASICHDR to EXEHDR for the PET-II machines.
* Moved the call to CHRCH in front of the code that saves the zero page, since
  open files are sometimes remembered in the zero page, so we need to close
  them before we grab a copy.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4507 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-12-09 12:42:24 +00:00
uz
c7a33334ba Don't hardcode the address of the SYS call for the startup code of the
Commodore machines.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4474 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-11-23 12:01:24 +00:00
uz
8216bf1d6a Force an import of the special symbol __STARTUP__ in the C compiler when
main() is encountered. Define this symbol in the startup code. This will
automatically force linking of the startup code which can then reside inside
the standard library as any other object file.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3988 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-07-31 12:05:42 +00:00
uz
7e9b6e7311 Fixed problems with the startup code (Greg King): Interrupts must be hooked
before calling initlib because initlib calls contructors and may install
drivers, which enable hardware interrupts. Similar for donelib.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3897 b7a2c559-68d2-44c3-8de9-860c34a00d81
2008-08-31 18:22:51 +00:00
cuz
f257b2ee81 Moved the data that keeps a copy of the used zero page locations in its own
segment to reduce the executable size.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3849 b7a2c559-68d2-44c3-8de9-860c34a00d81
2008-07-03 19:39:14 +00:00
cuz
bec540da9e Fixed obsolete __IRQFUNC_COUNT__ symbol name
git-svn-id: svn://svn.cc65.org/cc65/trunk@3548 b7a2c559-68d2-44c3-8de9-860c34a00d81
2005-07-25 17:05:52 +00:00
cuz
463712217c Add interrupt handling code from Stefan Haubenthal
git-svn-id: svn://svn.cc65.org/cc65/trunk@3264 b7a2c559-68d2-44c3-8de9-860c34a00d81
2004-10-26 19:44:30 +00:00
cuz
7a5d4f3138 Fixed issues with the last change: The return code must be pulled from stack
before the stack pointer is reset.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2906 b7a2c559-68d2-44c3-8de9-860c34a00d81
2004-03-08 20:38:58 +00:00
cuz
220e5a3898 Place the return code into ST
git-svn-id: svn://svn.cc65.org/cc65/trunk@2884 b7a2c559-68d2-44c3-8de9-860c34a00d81
2004-03-02 17:08:07 +00:00
cuz
be5adac693 Use the assembler version as BASIC line number, so the version of the
assembler (and probably compiler) can be determined from a compiled
executable. Nice idea from Stefan Haubenthal.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2880 b7a2c559-68d2-44c3-8de9-860c34a00d81
2004-02-02 13:34:12 +00:00
cuz
3b3e1bec17 Removed the empty LOWCODE segments from the startup files. This is now
handled by the OPTIONAL segment attribute in the linker config.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2164 b7a2c559-68d2-44c3-8de9-860c34a00d81
2003-05-22 22:32:04 +00:00
cuz
467d8ad9c5 Added routines to handle command line params
git-svn-id: svn://svn.cc65.org/cc65/trunk@2012 b7a2c559-68d2-44c3-8de9-860c34a00d81
2003-03-10 21:21:46 +00:00
cuz
bbbf2ac45a Move the startup code into its own segment
git-svn-id: svn://svn.cc65.org/cc65/trunk@1581 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-11-22 17:43:30 +00:00
cuz
6d498d8187 Use external symbols for the CBM kernal jump table functions. This allows
to emulate these functions on platforms where one or more of these functions
are not available (PET, CBM-II).


git-svn-id: svn://svn.cc65.org/cc65/trunk@1544 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-11-19 23:02:47 +00:00
cuz
4b805447b6 Prepare VIC20 startup for different start addresses
git-svn-id: svn://svn.cc65.org/cc65/trunk@1390 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-08-11 15:11:31 +00:00
cuz
8a4378e60c Remove unused code, port to new version
git-svn-id: svn://svn.cc65.org/cc65/trunk@1377 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-08-07 19:28:23 +00:00
cuz
f0d89e09bc Added VIC20 port changes from Steve Schmidtke
git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-08-07 05:18:13 +00:00