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Starting programs from shell shouldn't require saving CS:IP


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@926
This commit is contained in:
Sjoerd van der Berg 2003-04-13 20:28:47 +00:00
parent 192a32e3b2
commit 09a9c3eea9
1 changed files with 6 additions and 2 deletions
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8
src/shell/shell_misc.cpp
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@ -19,7 +19,7 @@
#include <stdlib.h>
#include <string.h>
#include "shell_inc.h"
#include "cpu.h"
#include "regs.h"
void DOS_Shell::ShowPrompt(void) {
@ -174,12 +174,14 @@ void DOS_Shell::Execute(char * name,char * args) {
/* Set the command line in the block and save it */
block.exec.cmdtail=RealMakeSeg(ss,reg_sp+0x100);
block.SaveData();
#if 0
/* Save CS:IP to some point where i can return them from */
Bit32u oldeip=reg_eip;
Bit16u oldcs=SegValue(cs);
RealPt newcsip=CALLBACK_RealPointer(call_shellstop);
SegSet16(cs,RealSeg(newcsip));
reg_ip=RealOff(newcsip);
#endif
/* Start up a dos execute interrupt */
reg_ax=0x4b00;
//Filename pointer
@ -188,12 +190,14 @@ void DOS_Shell::Execute(char * name,char * args) {
//Paramblock
SegSet16(es,SegValue(ss));
reg_bx=reg_sp;
flags.intf=false;
SETFLAGBIT(IF,false);
CALLBACK_RunRealInt(0x21);
/* Restore CS:IP and the stack */
reg_sp+=0x200;
#if 0
reg_eip=oldeip;
SegSet16(cs,oldcs);
#endif
}
}