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| author | tegge <tegge@FreeBSD.org> | 1997-08-17 17:42:59 +0000 |
|---|---|---|
| committer | tegge <tegge@FreeBSD.org> | 1997-08-17 17:42:59 +0000 |
| commit | 3dbac0faf6b7dc794192d426b80fe2adba124c7a (patch) | |
| tree | fb189c0892fc4a0504279cd73195abde5d4d92d5 /lib/libkvm/kvm_amd64.c | |
| parent | e1e14dc94ca2d5ba5c9c722980c0c9aed6b07765 (diff) | |
| download | FreeBSD-src-3dbac0faf6b7dc794192d426b80fe2adba124c7a.zip FreeBSD-src-3dbac0faf6b7dc794192d426b80fe2adba124c7a.tar.gz | |
Copy code from gnu/usr.bin/gdb/gdb/kvm-fbsd.c to deal with 4 MB pages.
Diffstat (limited to 'lib/libkvm/kvm_amd64.c')
| -rw-r--r-- | lib/libkvm/kvm_amd64.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/libkvm/kvm_amd64.c b/lib/libkvm/kvm_amd64.c index c32fd53..d36b922 100644 --- a/lib/libkvm/kvm_amd64.c +++ b/lib/libkvm/kvm_amd64.c @@ -151,6 +151,19 @@ _kvm_vatop(kvm_t *kd, u_long va, u_long *pa) if (((u_long)pde & PG_V) == 0) goto invalid; + if ((u_long)pde & 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) + *pa = ((u_long)pde & PG_FRAME4M) + (va & PAGE4M_MASK); + return (NBPDR - (va & PAGE4M_MASK)); + } + pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1); pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t)); |
