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Sync with sys/i386/i386/machdep.c revision 1.355.

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This commit is contained in:
KATO Takenori 1999-07-09 12:51:11 +00:00
parent 499067071c
commit 5027350f75
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=48699
2 changed files with 164 additions and 2 deletions
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83
sys/pc98/i386/machdep.c
View file

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.124 1999/07/05 08:52:54 msmith Exp $
* $Id: machdep.c,v 1.125 1999/07/08 12:48:53 kato Exp $
*/
#include "apm.h"
@ -2163,6 +2163,87 @@ set_fpregs(p, fpregs)
return (0);
}
int
fill_dbregs(p, dbregs)
struct proc *p;
struct dbreg *dbregs;
{
struct pcb *pcb;
pcb = &p->p_addr->u_pcb;
dbregs->dr0 = pcb->pcb_dr0;
dbregs->dr1 = pcb->pcb_dr1;
dbregs->dr2 = pcb->pcb_dr2;
dbregs->dr3 = pcb->pcb_dr3;
dbregs->dr4 = 0;
dbregs->dr5 = 0;
dbregs->dr6 = pcb->pcb_dr6;
dbregs->dr7 = pcb->pcb_dr7;
return (0);
}
int
set_dbregs(p, dbregs)
struct proc *p;
struct dbreg *dbregs;
{
struct pcb *pcb;
pcb = &p->p_addr->u_pcb;
/*
* Don't let a process set a breakpoint that is not within the
* process's address space. If a process could do this, it
* could halt the system by setting a breakpoint in the kernel
* (if ddb was enabled). Thus, we need to check to make sure
* that no breakpoints are being enabled for addresses outside
* process's address space, unless, perhaps, we were called by
* uid 0.
*
* XXX - what about when the watched area of the user's
* address space is written into from within the kernel
* ... wouldn't that still cause a breakpoint to be generated
* from within kernel mode?
*/
if (p->p_cred->pc_ucred->cr_uid != 0) {
if (dbregs->dr7 & 0x3) {
/* dr0 is enabled */
if (dbregs->dr0 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
if (dbregs->dr7 & (0x3<<2)) {
/* dr1 is enabled */
if (dbregs->dr1 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
if (dbregs->dr7 & (0x3<<4)) {
/* dr2 is enabled */
if (dbregs->dr2 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
if (dbregs->dr7 & (0x3<<6)) {
/* dr3 is enabled */
if (dbregs->dr3 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
}
pcb->pcb_dr0 = dbregs->dr0;
pcb->pcb_dr1 = dbregs->dr1;
pcb->pcb_dr2 = dbregs->dr2;
pcb->pcb_dr3 = dbregs->dr3;
pcb->pcb_dr6 = dbregs->dr6;
pcb->pcb_dr7 = dbregs->dr7;
pcb->pcb_flags |= PCB_DBREGS;
return (0);
}
#ifndef DDB
void
Debugger(const char *msg)

83
sys/pc98/pc98/machdep.c
View file

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.124 1999/07/05 08:52:54 msmith Exp $
* $Id: machdep.c,v 1.125 1999/07/08 12:48:53 kato Exp $
*/
#include "apm.h"
@ -2163,6 +2163,87 @@ set_fpregs(p, fpregs)
return (0);
}
int
fill_dbregs(p, dbregs)
struct proc *p;
struct dbreg *dbregs;
{
struct pcb *pcb;
pcb = &p->p_addr->u_pcb;
dbregs->dr0 = pcb->pcb_dr0;
dbregs->dr1 = pcb->pcb_dr1;
dbregs->dr2 = pcb->pcb_dr2;
dbregs->dr3 = pcb->pcb_dr3;
dbregs->dr4 = 0;
dbregs->dr5 = 0;
dbregs->dr6 = pcb->pcb_dr6;
dbregs->dr7 = pcb->pcb_dr7;
return (0);
}
int
set_dbregs(p, dbregs)
struct proc *p;
struct dbreg *dbregs;
{
struct pcb *pcb;
pcb = &p->p_addr->u_pcb;
/*
* Don't let a process set a breakpoint that is not within the
* process's address space. If a process could do this, it
* could halt the system by setting a breakpoint in the kernel
* (if ddb was enabled). Thus, we need to check to make sure
* that no breakpoints are being enabled for addresses outside
* process's address space, unless, perhaps, we were called by
* uid 0.
*
* XXX - what about when the watched area of the user's
* address space is written into from within the kernel
* ... wouldn't that still cause a breakpoint to be generated
* from within kernel mode?
*/
if (p->p_cred->pc_ucred->cr_uid != 0) {
if (dbregs->dr7 & 0x3) {
/* dr0 is enabled */
if (dbregs->dr0 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
if (dbregs->dr7 & (0x3<<2)) {
/* dr1 is enabled */
if (dbregs->dr1 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
if (dbregs->dr7 & (0x3<<4)) {
/* dr2 is enabled */
if (dbregs->dr2 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
if (dbregs->dr7 & (0x3<<6)) {
/* dr3 is enabled */
if (dbregs->dr3 >= VM_MAXUSER_ADDRESS)
return (EINVAL);
}
}
pcb->pcb_dr0 = dbregs->dr0;
pcb->pcb_dr1 = dbregs->dr1;
pcb->pcb_dr2 = dbregs->dr2;
pcb->pcb_dr3 = dbregs->dr3;
pcb->pcb_dr6 = dbregs->dr6;
pcb->pcb_dr7 = dbregs->dr7;
pcb->pcb_flags |= PCB_DBREGS;
return (0);
}
#ifndef DDB
void
Debugger(const char *msg)