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Support 4MB pages.

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This commit is contained in:
Bruce Evans 1997-07-27 18:29:04 +00:00
parent a39c8cb67d
commit d1ef093383
3 changed files with 66 additions and 21 deletions
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29
gnu/usr.bin/binutils/gdb/i386/kvm-fbsd.c
View File

@ -791,14 +791,29 @@ kvtophys (fd, addr)
if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
return (~0);
/*
* Read the second-level page table.
*/
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
if (pte & PG_PS)
{
/*
* No second-level page table; ptd describes one 4MB page.
* (We assume that the kernel wouldn't set PG_PS without enabling
* it cr0, and that the kernel doesn't support 36-bit physical
* addresses).
*/
#define PAGE4M_MASK (NBPDR - 1)
#define PG_FRAME4M (~PAGE4M_MASK)
addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
}
else
{
/*
* Read the second-level page table.
*/
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
}
#if 0
printf ("vtophys (%x) -> %x\n", oldaddr, addr);
#endif

29
gnu/usr.bin/binutils/gdb/kvm-fbsd.c
View File

@ -791,14 +791,29 @@ kvtophys (fd, addr)
if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
return (~0);
/*
* Read the second-level page table.
*/
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
if (pte & PG_PS)
{
/*
* No second-level page table; ptd describes one 4MB page.
* (We assume that the kernel wouldn't set PG_PS without enabling
* it cr0, and that the kernel doesn't support 36-bit physical
* addresses).
*/
#define PAGE4M_MASK (NBPDR - 1)
#define PG_FRAME4M (~PAGE4M_MASK)
addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
}
else
{
/*
* Read the second-level page table.
*/
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
}
#if 0
printf ("vtophys (%x) -> %x\n", oldaddr, addr);
#endif

29
gnu/usr.bin/gdb/gdb/kvm-fbsd.c
View File

@ -791,14 +791,29 @@ kvtophys (fd, addr)
if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
return (~0);
/*
* Read the second-level page table.
*/
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
if (pte & PG_PS)
{
/*
* No second-level page table; ptd describes one 4MB page.
* (We assume that the kernel wouldn't set PG_PS without enabling
* it cr0, and that the kernel doesn't support 36-bit physical
* addresses).
*/
#define PAGE4M_MASK (NBPDR - 1)
#define PG_FRAME4M (~PAGE4M_MASK)
addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
}
else
{
/*
* Read the second-level page table.
*/
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
}
#if 0
printf ("vtophys (%x) -> %x\n", oldaddr, addr);
#endif