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Sync with sys/i386/i386/machdep.c revision 1.296.
This commit is contained in:
KATO Takenori
parent
dcf2c48fc9
commit
fa7cfb3b65
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=36187
@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.81 1998/03/24 08:27:19 kato Exp $
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* $Id: machdep.c,v 1.82 1998/04/07 09:07:53 kato Exp $
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*/
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#include "apm.h"
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@ -44,6 +44,7 @@
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#include "opt_cpu.h"
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#include "opt_ddb.h"
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#include "opt_maxmem.h"
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#include "opt_msgbuf.h"
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#include "opt_perfmon.h"
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#include "opt_smp.h"
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#include "opt_sysvipc.h"
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@ -126,11 +127,9 @@
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#include <i386/isa/rtc.h>
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#endif
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#include <machine/random.h>
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#include <sys/ptrace.h>
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extern void init386 __P((int first));
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extern int ptrace_set_pc __P((struct proc *p, unsigned int addr));
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extern int ptrace_single_step __P((struct proc *p));
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extern int ptrace_write_u __P((struct proc *p, vm_offset_t off, int data));
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extern void dblfault_handler __P((void));
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extern void printcpuinfo(void); /* XXX header file */
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@ -158,7 +157,7 @@ int bouncepages = 0;
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#endif /* BOUNCE_BUFFERS */
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int msgbufmapped = 0; /* set when safe to use msgbuf */
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int _udatasel, _ucodesel;
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int _udatasel, _ucodesel;
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u_int atdevbase;
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#if defined(SWTCH_OPTIM_STATS)
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@ -1105,6 +1104,7 @@ init386(first)
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unsigned biosbasemem, biosextmem;
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struct gate_descriptor *gdp;
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int gsel_tss;
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char *cp;
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struct isa_device *idp;
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#ifndef SMP
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@ -1563,7 +1563,7 @@ init386(first)
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* calculation, etc.).
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*/
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while (phys_avail[pa_indx - 1] + PAGE_SIZE +
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round_page(sizeof(struct msgbuf)) >= phys_avail[pa_indx]) {
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round_page(MSGBUF_SIZE) >= phys_avail[pa_indx]) {
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physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]);
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phys_avail[pa_indx--] = 0;
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phys_avail[pa_indx--] = 0;
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@ -1572,16 +1572,25 @@ init386(first)
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Maxmem = atop(phys_avail[pa_indx]);
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/* Trim off space for the message buffer. */
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phys_avail[pa_indx] -= round_page(sizeof(struct msgbuf));
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phys_avail[pa_indx] -= round_page(MSGBUF_SIZE);
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avail_end = phys_avail[pa_indx];
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/* now running on new page tables, configured,and u/iom is accessible */
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/* Map the message buffer. */
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for (off = 0; off < round_page(sizeof(struct msgbuf)); off += PAGE_SIZE)
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for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
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pmap_enter(kernel_pmap, (vm_offset_t)msgbufp + off,
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avail_end + off, VM_PROT_ALL, TRUE);
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cp = (char *)msgbufp;
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msgbufp = (struct msgbuf *) (cp + MSGBUF_SIZE - sizeof(*msgbufp));
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if (msgbufp->msg_magic != MSG_MAGIC || msgbufp->msg_ptr != cp) {
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bzero(cp, MSGBUF_SIZE);
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msgbufp->msg_magic = MSG_MAGIC;
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msgbufp->msg_size = (char *)msgbufp - cp;
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msgbufp->msg_ptr = cp;
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}
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msgbufmapped = 1;
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/* make a call gate to reenter kernel with */
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@ -1625,7 +1634,6 @@ f00f_hack(void *unused) {
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struct region_descriptor r_idt;
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#endif
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vm_offset_t tmp;
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int i;
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if (!has_f00f_bug)
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return;
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@ -1668,6 +1676,28 @@ ptrace_single_step(p)
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return (0);
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}
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int ptrace_read_u_check(p, addr, len)
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struct proc *p;
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vm_offset_t addr;
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size_t len;
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{
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vm_offset_t gap;
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if ((vm_offset_t) (addr + len) < addr)
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return EPERM;
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if ((vm_offset_t) (addr + len) <= sizeof(struct user))
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return 0;
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gap = (char *) p->p_md.md_regs - (char *) p->p_addr;
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if ((vm_offset_t) addr < gap)
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return EPERM;
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if ((vm_offset_t) (addr + len) <=
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(vm_offset_t) (gap + sizeof(struct trapframe)))
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return 0;
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return EPERM;
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}
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int ptrace_write_u(p, off, data)
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struct proc *p;
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vm_offset_t off;
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@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.81 1998/03/24 08:27:19 kato Exp $
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* $Id: machdep.c,v 1.82 1998/04/07 09:07:53 kato Exp $
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*/
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#include "apm.h"
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@ -44,6 +44,7 @@
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#include "opt_cpu.h"
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#include "opt_ddb.h"
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#include "opt_maxmem.h"
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#include "opt_msgbuf.h"
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#include "opt_perfmon.h"
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#include "opt_smp.h"
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#include "opt_sysvipc.h"
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@ -126,11 +127,9 @@
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#include <i386/isa/rtc.h>
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#endif
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#include <machine/random.h>
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#include <sys/ptrace.h>
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extern void init386 __P((int first));
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extern int ptrace_set_pc __P((struct proc *p, unsigned int addr));
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extern int ptrace_single_step __P((struct proc *p));
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extern int ptrace_write_u __P((struct proc *p, vm_offset_t off, int data));
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extern void dblfault_handler __P((void));
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extern void printcpuinfo(void); /* XXX header file */
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@ -158,7 +157,7 @@ int bouncepages = 0;
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#endif /* BOUNCE_BUFFERS */
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int msgbufmapped = 0; /* set when safe to use msgbuf */
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int _udatasel, _ucodesel;
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int _udatasel, _ucodesel;
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u_int atdevbase;
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#if defined(SWTCH_OPTIM_STATS)
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@ -1105,6 +1104,7 @@ init386(first)
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unsigned biosbasemem, biosextmem;
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struct gate_descriptor *gdp;
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int gsel_tss;
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char *cp;
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struct isa_device *idp;
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#ifndef SMP
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@ -1563,7 +1563,7 @@ init386(first)
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* calculation, etc.).
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*/
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while (phys_avail[pa_indx - 1] + PAGE_SIZE +
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round_page(sizeof(struct msgbuf)) >= phys_avail[pa_indx]) {
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round_page(MSGBUF_SIZE) >= phys_avail[pa_indx]) {
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physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]);
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phys_avail[pa_indx--] = 0;
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phys_avail[pa_indx--] = 0;
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@ -1572,16 +1572,25 @@ init386(first)
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Maxmem = atop(phys_avail[pa_indx]);
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/* Trim off space for the message buffer. */
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phys_avail[pa_indx] -= round_page(sizeof(struct msgbuf));
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phys_avail[pa_indx] -= round_page(MSGBUF_SIZE);
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avail_end = phys_avail[pa_indx];
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/* now running on new page tables, configured,and u/iom is accessible */
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/* Map the message buffer. */
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for (off = 0; off < round_page(sizeof(struct msgbuf)); off += PAGE_SIZE)
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for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
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pmap_enter(kernel_pmap, (vm_offset_t)msgbufp + off,
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avail_end + off, VM_PROT_ALL, TRUE);
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cp = (char *)msgbufp;
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msgbufp = (struct msgbuf *) (cp + MSGBUF_SIZE - sizeof(*msgbufp));
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if (msgbufp->msg_magic != MSG_MAGIC || msgbufp->msg_ptr != cp) {
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bzero(cp, MSGBUF_SIZE);
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msgbufp->msg_magic = MSG_MAGIC;
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msgbufp->msg_size = (char *)msgbufp - cp;
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msgbufp->msg_ptr = cp;
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}
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msgbufmapped = 1;
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/* make a call gate to reenter kernel with */
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@ -1625,7 +1634,6 @@ f00f_hack(void *unused) {
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struct region_descriptor r_idt;
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#endif
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vm_offset_t tmp;
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int i;
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if (!has_f00f_bug)
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return;
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@ -1668,6 +1676,28 @@ ptrace_single_step(p)
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return (0);
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}
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int ptrace_read_u_check(p, addr, len)
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struct proc *p;
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vm_offset_t addr;
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size_t len;
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{
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vm_offset_t gap;
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if ((vm_offset_t) (addr + len) < addr)
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return EPERM;
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if ((vm_offset_t) (addr + len) <= sizeof(struct user))
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return 0;
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gap = (char *) p->p_md.md_regs - (char *) p->p_addr;
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if ((vm_offset_t) addr < gap)
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return EPERM;
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if ((vm_offset_t) (addr + len) <=
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(vm_offset_t) (gap + sizeof(struct trapframe)))
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return 0;
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return EPERM;
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}
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int ptrace_write_u(p, off, data)
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struct proc *p;
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vm_offset_t off;
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