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ack/plat/msdos386/libsys/rename.s

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Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds.
2022-08-07 20:10:08 +00:00
#
! $Source$
! $State$
! $Revision$
! Declare segments (the order is important).
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
! Rename a file.
.define _rename
_rename:
Most of read and write now works; filename-based operations partially work; but there's a nasty memory corruption somewhere which needs investigating.
2022-08-18 22:08:57 +00:00
mov ebx, esp
push esi
push edi
! Source filename.
mov esi, 4(ebx)
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
movzx edi, (transfer_buffer_ptr)
mov es, (pmode_ds)
cld
Most of read and write now works; filename-based operations partially work; but there's a nasty memory corruption somewhere which needs investigating.
2022-08-18 22:08:57 +00:00
1:
lodsb
stosb
testb al, al
jnz 1b
! Destination filename.
mov eax, edi
mov esi, 8(ebx)
1:
lodsb
stosb
testb al, al
jnz 1b
! Make the DOS call.
o16 mov dx, (transfer_buffer_ptr)
o16 mov di, ax
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds.
2022-08-07 20:10:08 +00:00
movb ah, 0x56
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
mov ebx, 0x210000
Most of read and write now works; filename-based operations partially work; but there's a nasty memory corruption somewhere which needs investigating.
2022-08-18 22:08:57 +00:00
callf (interrupt_ptr)
pop edi
pop esi
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
push ss
pop es
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds.
2022-08-07 20:10:08 +00:00
jmp .sys_zret
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