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int2f: fix call interface around syscall_MUX14( ) (inthndlr.c) 

The issues are similar to those surrounding int2F_12_hanndler( )
(see https://github.com/FDOS/kernel/issues/11).
This commit is contained in:
Tee-Kiah Chia 2019-12-07 21:24:36 +08:00 committed by Kenneth J Davis
parent c07577cbfb
commit 6a29f57715
4 changed files with 18 additions and 31 deletions
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8
hdr/pcb.h
View File

@ -87,14 +87,6 @@ typedef struct {
UWORD si, di, ds, es;
} lregs;
/* Registers directly passed to syscall;
must be the same order as iregs!
Is used to define parameters. */
#define DIRECT_IREGS \
xreg a, xreg b, xreg c, xreg d, \
UWORD si, UWORD di, UWORD bp, UWORD ds, UWORD es, \
UWORD ip, UWORD cs, UWORD flags
/* Process control block for task switching */
typedef struct {
UWORD pc_ss;

3
kernel/int2f.asm
View File

@ -149,8 +149,9 @@ Int2f?14: ;; MUX-14 -- NLSFUNC API
push bp ; Preserve BP later on
Protect386Registers
PUSH$ALL
mov ds, [cs:_DGROUP_]
SwitchToInt2fStack
call _syscall_MUX14
DoneInt2fStack
pop bp ; Discard incoming AX
push ax ; Correct stack for POP$ALL
POP$ALL

36
kernel/nls.c
View File

@ -667,60 +667,54 @@ VOID FAR *DosGetDBCS(void)
Return value: AL register to be returned
if AL == 0, Carry must be cleared, otherwise set
*/
UWORD ASMCFUNC syscall_MUX14(DIRECT_IREGS)
UWORD ASMCFUNC syscall_MUX14(iregs FAR *pr)
{
struct nlsPackage FAR *nls; /* addressed NLS package */
UNREFERENCED_PARAMETER(flags);
UNREFERENCED_PARAMETER(cs);
UNREFERENCED_PARAMETER(ip);
UNREFERENCED_PARAMETER(ds);
UNREFERENCED_PARAMETER(es);
UNREFERENCED_PARAMETER(si);
log(("NLS: MUX14(): subfct=%x, cp=%u, cntry=%u\n", pr->AL, pr->BX, pr->DX));
log(("NLS: MUX14(): subfct=%x, cp=%u, cntry=%u\n", AL, BX, DX));
if ((nls = searchPackage(BX, DX)) == NULL)
if ((nls = searchPackage(pr->BX, pr->DX)) == NULL)
return DE_INVLDFUNC; /* no such package */
log(("NLS: MUX14(): NLS pkg found\n"));
switch (AL)
switch (pr->AL)
{
case NLSFUNC_INSTALL_CHECK:
BX = NLS_FREEDOS_NLSFUNC_ID;
pr->BX = NLS_FREEDOS_NLSFUNC_ID;
return SUCCESS; /* kernel just simulates default functions */
case NLSFUNC_DOS38:
return nlsGetData(nls, NLS_DOS_38, MK_FP(ES, DI), 34);
return nlsGetData(nls, NLS_DOS_38, MK_FP(pr->ES, pr->DI), 34);
case NLSFUNC_GETDATA:
return nlsGetData(nls, BP, MK_FP(ES, DI), CX);
return nlsGetData(nls, pr->BP, MK_FP(pr->ES, pr->DI), pr->CX);
case NLSFUNC_DRDOS_GETDATA:
/* Does not pass buffer length */
return nlsGetData(nls, CL, MK_FP(ES, DI), 512);
return nlsGetData(nls, pr->CL, MK_FP(pr->ES, pr->DI), 512);
case NLSFUNC_LOAD_PKG:
return nlsLoadPackage(nls);
case NLSFUNC_LOAD_PKG2:
return nlsSetPackage(nls);
case NLSFUNC_YESNO:
return nlsYesNo(nls, CX);
return nlsYesNo(nls, pr->CX);
case NLSFUNC_UPMEM:
nlsUpMem(nls, MK_FP(ES, DI), CX);
nlsUpMem(nls, MK_FP(pr->ES, pr->DI), pr->CX);
return SUCCESS;
case NLSFUNC_FILE_UPMEM:
#ifdef NLS_DEBUG
{
unsigned j;
BYTE FAR *p;
log(("NLS: MUX14(FILE_UPMEM): len=%u, %04x:%04x=\"", CX, ES, DI));
for (j = 0, p = MK_FP(ES, DI); j < CX; ++j)
log(("NLS: MUX14(FILE_UPMEM): len=%u, %04x:%04x=\"", pr->CX,
pr->ES, pr->DI));
for (j = 0, p = MK_FP(pr->ES, pr->DI); j < pr->CX; ++j)
printf("%c", p[j] > 32 ? p[j] : '.');
printf("\"\n");
}
#endif
nlsFUpMem(nls, MK_FP(ES, DI), CX);
nlsFUpMem(nls, MK_FP(pr->ES, pr->DI), pr->CX);
return SUCCESS;
}
log(("NLS: MUX14(): Invalid function %x\n", AL));
log(("NLS: MUX14(): Invalid function %x\n", pr->AL));
return DE_INVLDFUNC; /* no such function */
}

2
kernel/proto.h
View File

@ -277,7 +277,7 @@ COUNT DosSetCountry(UWORD cntry);
COUNT DosGetCodepage(UWORD * actCP, UWORD * sysCP);
COUNT DosSetCodepage(UWORD actCP, UWORD sysCP);
VOID FAR *DosGetDBCS(void);
UWORD ASMCFUNC syscall_MUX14(DIRECT_IREGS);
UWORD ASMCFUNC syscall_MUX14(iregs FAR *);
/* prf.c */
#ifdef DEBUG