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Do a better job at preparing registers for the new process in setregs()

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by setting them all to a known state.
This commit is contained in:
David Greenman 1994-11-06 04:46:53 +00:00
parent af3b22a544
commit fc64ae2b4e
2 changed files with 22 additions and 16 deletions
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19
sys/amd64/amd64/machdep.c
View file

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.85 1994/11/03 14:57:54 jkh Exp $
* $Id: machdep.c,v 1.86 1994/11/06 01:33:03 bde Exp $
*/
#include "npx.h"
@ -859,13 +859,16 @@ setregs(p, entry, stack)
u_long entry;
u_long stack;
{
p->p_md.md_regs[tEBP] = 0; /* bottom of the fp chain */
p->p_md.md_regs[tEIP] = entry;
p->p_md.md_regs[tESP] = stack;
p->p_md.md_regs[tSS] = _udatasel;
p->p_md.md_regs[tDS] = _udatasel;
p->p_md.md_regs[tES] = _udatasel;
p->p_md.md_regs[tCS] = _ucodesel;
int *regs = p->p_md.md_regs;
bzero(regs, sizeof(struct trapframe));
regs[tEIP] = entry;
regs[tESP] = stack;
regs[tEFLAGS] = PSL_USERSET | (regs[tEFLAGS] & PSL_T);
regs[tSS] = _udatasel;
regs[tDS] = _udatasel;
regs[tES] = _udatasel;
regs[tCS] = _ucodesel;
p->p_addr->u_pcb.pcb_flags = 0; /* no fp at all */
load_cr0(rcr0() | CR0_TS); /* start emulating */

19
sys/i386/i386/machdep.c
View file

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.85 1994/11/03 14:57:54 jkh Exp $
* $Id: machdep.c,v 1.86 1994/11/06 01:33:03 bde Exp $
*/
#include "npx.h"
@ -859,13 +859,16 @@ setregs(p, entry, stack)
u_long entry;
u_long stack;
{
p->p_md.md_regs[tEBP] = 0; /* bottom of the fp chain */
p->p_md.md_regs[tEIP] = entry;
p->p_md.md_regs[tESP] = stack;
p->p_md.md_regs[tSS] = _udatasel;
p->p_md.md_regs[tDS] = _udatasel;
p->p_md.md_regs[tES] = _udatasel;
p->p_md.md_regs[tCS] = _ucodesel;
int *regs = p->p_md.md_regs;
bzero(regs, sizeof(struct trapframe));
regs[tEIP] = entry;
regs[tESP] = stack;
regs[tEFLAGS] = PSL_USERSET | (regs[tEFLAGS] & PSL_T);
regs[tSS] = _udatasel;
regs[tDS] = _udatasel;
regs[tES] = _udatasel;
regs[tCS] = _ucodesel;
p->p_addr->u_pcb.pcb_flags = 0; /* no fp at all */
load_cr0(rcr0() | CR0_TS); /* start emulating */