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Author SHA1 Message Date
d0p1 🏳️‍⚧️ c4bbe52d24 Pretty working 65oo2 assembler. 2024-02-23 16:09:37 +01:00
d0p1 🏳️‍⚧️ 9a7c5579b5 65oo2 boilerplate 2024-02-22 16:13:52 +01:00
tkchia 56ebd1409b plat/linuxppc/emu: get dump_state( ) to also dump FP registers 2023-07-08 20:08:33 +00:00
tkchia 7dd8ea2ea5 plat/linuxppc/emu: fix fctiw & fctiwz emulation for AArch64 host 
Fixes https://github.com/davidgiven/ack/issues/287
 2023-07-08 19:54:29 +00:00
dg 3badc8ece7 Remove the qemu tests --- they've never been reliable and cause problems for 
people.
 2023-02-13 22:21:42 +00:00
tkchia b59422a24b pc86: add degenerate "hard disk partition table" to boot sector 
This is needed on some PCs to boot the pc86.img as a USB drive.
 2022-09-20 16:14:38 +00:00
tkchia 247a2bd6ae plat/msdos386: rename _psp[] to .psp, avoid namespace pollution 2022-08-26 17:32:50 +00:00
tkchia f8a6f92752 plat/msdos386: fix: RM int 0x21 calls was clobbering high halves 
of esi and edi registers
 2022-08-26 17:32:50 +00:00
tkchia cba54b205b plat/msdos386: refactor, firm up, and optimize 
- refactor code for transfer buffer reads/writes, real mode
   int 0x21 calls, and assembler segment declarations
 - define transfer buffer size in one place
 - beef up error checking for transfer buffer operations
   (prevent buffer overflows)
 - also optimize such operations to transfer dword by dword
   where feasible
 2022-08-26 17:31:28 +00:00
tkchia 15955282f6 plat/msdos386: fix some issues in libsys code 
- ensure es = ds = ss upon exit of each C runtime function
 - clear upper 16 bits of ebx before setting them to 0x0021,
   when invoking interrupt_ptr to simulate a RM int 0x21
 - make _sys_exists use the transfer buffer (which it needs)
 - make _sys_rawread properly handle an end-of-file read
   (zero bytes read)
 - make argument to _sys_seterrno short --- after a failed
   int 0x21 call, only the lower 16 bits of eax hold the MS-DOs
   error code
 - _sys_rawlseek accepts only 3 longword arguments, not 4
   (the offset is only 1 longword)
 - other minor fixes
 2022-08-24 15:17:04 +00:00
tkchia 249e4b9069 plat/msdos386: fix a few more issues with startup and stub code 
- correctly calculate size of BSS area to clear
 - make realloc routine set both ds & es to point to new
   data segment
 - correctly initialize real mode flags when simulating real
   mode interrupt via DPMI
 - other minor fixes
 2022-08-24 10:17:15 +00:00
tkchia 95ed8ee484 plat/msdos386: fix startup code so that it works under dosemu2 
- do not try to store data through code segment selectors
 - set each segment limit to segment size - 1, not segment size
 - get PSP segment while still in real/V86 mode (DPMI host
   might choose to return PM selector for int 0x21, ah = 0x62)
 - other minor fixes
 2022-08-23 14:35:43 +00:00
David Given 887ec0656e Update documentation. 2022-08-19 20:08:39 +02:00
David Given d24c3f8722 Fix typo. 2022-08-19 20:03:48 +02:00
David Given c37c0e62cc Remember to actually update the brk position when calling brk. 2022-08-19 20:03:40 +02:00
David Given dc1f69be83 Most of read and write now works; filename-based operations partially work; but 
there's a nasty memory corruption somewhere which needs investigating.
 2022-08-19 00:08:57 +02:00
David Given 5329c98b81 Simplify and fix reading and writing so they seem to work. 2022-08-18 21:21:33 +02:00
David Given cc356b5c75 Programs now start up and can write to the console, but crash when reading. 2022-08-18 00:24:08 +02:00
David Given 48398b072a write() system calls work; start going through the libsys. 2022-08-17 22:34:06 +02:00
David Given 680b6b9857 Marshal the environment, command line and PSP into 32-bit memory. 2022-08-11 23:36:23 +02:00
David Given 1764c6baa2 Made realloc work; the 32-bit process can now be resized to include bss and 
stack.
 2022-08-10 16:14:12 +02:00
David Given d464606dd6 We can now load and run 32-bit protected-mode executables. We have not, 
however, set up the data segment.
 2022-08-09 23:49:18 +02:00
David Given b48b5b13ce Maybe have a working stub now. 2022-08-09 23:32:41 +02:00
David Given 21b30ccadb We can now switch to 32-bit mode. 2022-08-08 23:22:00 +02:00
David Given 1e0961c679 Do enough of the boot stub to produce an EXE header and enter DPMI protected 
mode.
 2022-08-08 22:03:12 +02:00
David Given f2a49ff3ab msdos86 actually emits .COM files. 2022-08-08 00:01:06 +02:00
David Given b81ac5e2c3 Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds. 2022-08-07 22:10:08 +02:00
David Given 00c722d2ef Merge from trunk. 2022-08-07 22:01:08 +02:00
tkchia 63f646de78 plat/msdos86: add rename( ) 2022-08-07 16:38:31 +00:00
David Given 6d9ac0b182 Add the nonfunctional boilerplate for the MSDOS 386 port. 2022-08-03 20:41:06 +02:00
David Given 511c3e99ee Fix a whole bunch of warnings. 2022-08-01 22:08:23 +02:00
David Given 33ce9169b4
Merge pull request #259 from davidgiven/dtrg-ci 
Make work on Windows.
 2022-07-18 23:05:01 +02:00
David Given c573b9bce2 Split aal arguments properly. 2022-07-18 16:48:14 +02:00
David Given 01c2342e18 Create archives in chunks to allow for very long lists of members. 2022-07-18 00:55:02 +02:00
David Given 496424acf6 Merge from default. 2022-07-16 19:35:49 +02:00
tkchia 0236f00d26 plat/msdos86: fix: read() on O_TEXT fd should try to return any errors signaled by low-level read 2022-07-16 17:20:47 +00:00
David Given 9519588f59 Convert all the things to Unix format. 2022-07-16 00:02:46 +02:00
David Given 25b6712e63 Rework all the ackbuilder scripts not to use wildcards, because we can't expand 
them without luaposix, which isn't available (easily) on OSX or Windows.
 2022-07-14 23:57:54 +02:00
tkchia 1c71653d7f plat/msdos86: free up program memory above 64 KiB; also check 
we have enough memory for BSS
 2022-06-28 20:13:16 +00:00
tkchia 571fce1165 plat/msdos86: make getpid() use European MS-DOS's getpid syscall 
if it exists
 2022-06-24 17:00:57 +00:00
Tee-Kiah Chia 76c40b5dc0 plat/msdos86: add unlink( ) 2022-01-21 21:06:33 +00:00
Tee-Kiah Chia 84a25b0526 Add fork, wait, waitpid for all Linux targets, & execl for linux386. 2022-01-19 17:05:59 +00:00
David Given 7286c67e8f
Merge pull request #224 from nick-less/default 
fix compile error under macos
 2021-04-26 17:34:09 +02:00
Tee-Kiah Chia a6c7ac2a28 plat/msdos86: add gettimeofday( ) 2021-03-29 15:15:13 +00:00
Tee-Kiah Chia f2c8828a4b plat/msdos86: copy stubs kill( ), signal( ), from plat/pc86 2021-03-28 17:21:54 +00:00
Tee-Kiah Chia 466cf20805 plat/msdos86: add open( ), lseek( ), and getpid() 2021-03-28 17:21:53 +00:00
Tee-Kiah Chia 0d2b55cd29 plat/msdos86: add isatty( ), _setmode( ), read( ), write( ) 2021-03-28 17:21:52 +00:00
Tee-Kiah Chia aaf3ef695b plat/msdos86: implement close( ) function & proper errno setting 2021-03-27 13:23:44 +00:00
Tee-Kiah Chia 4c678ca210 Adding MS-DOS .com program support (msdos86). Still incomplete. 2021-03-27 13:15:56 +00:00
Tee-Kiah Chia 64a74b4e09 Add .seek asm pseudo-op, advances location counter to fixed offset 
The new .seek assembler pseudo-op advances the location
counter to a fixed offset within a section --- or to a fixed
address, if the section is a .base'd section.  It works
somewhat like the GNU assembler's .org pseudo-op, though
with a hopefully less confusing name.

This pseudo-op lets us avoid having to manually compute the
needed boot sector padding in the pc86 start-up code
plat/pc86/boot.s .
 2021-03-19 13:36:24 +00:00