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fixed a bug when calling int 21/31 (set to pm code segment)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1174
This commit is contained in:
Ulf Wohlers 2003-07-29 09:24:37 +00:00
parent f6cd3dd51e
commit dabe910b10
1 changed files with 4 additions and 3 deletions
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7
src/ints/dpmi.cpp
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@ -950,6 +950,7 @@ Bitu DPMI::Int21Handler(void)
PushStack(reg_esp);
PushStack(SegValue(ds));
PushStack(SegValue(es));
PushStack(SegValue(cs));
/* Swtich to real mode */
CPU_SET_CRX(0,cpu.cr0 & ~CR0_PROTECTION);
@ -958,7 +959,7 @@ Bitu DPMI::Int21Handler(void)
reg_ip = RealOff(CALLBACK_RealPointer(callback.int21Return));
// setup stack
SegSet16(ss,rm_ss);
reg_sp = rm_sp;
reg_esp = rm_sp;
// Call realmode interrupt
DPMI_LOG("DPMI: INT 21 %04X called.",reg_ax);
Interrupt(0x21);
@ -976,15 +977,15 @@ Bitu DPMI::Int21HandlerReturn(void)
/* Switch to protected mode */
CPU_SET_CRX(0,cpu.cr0 | CR0_PROTECTION);
// Restore Registers
Bitu newcs = PopStack();
CPU_SetSegGeneral(es,PopStack());
CPU_SetSegGeneral(ds,PopStack());
reg_esp = PopStack();
CPU_SetSegGeneral(ss,PopStack());
// DPMI_RestoreSegments();
// Set carry flag
DPMI_CALLBACK_SCF(flags.word & 1);
DPMI_LOG("DPMI: INT 21 RETURN");
CPU_JMP(dpmi.client.bit32,SegValue(cs),reg_eip);
CPU_JMP(dpmi.client.bit32,newcs,reg_eip);
return 0;
}