Copy code from gnu/usr.bin/gdb/gdb/kvm-fbsd.c to deal with 4 MB pages.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=28318
@ -151,6 +151,19 @@ _kvm_vatop(kvm_t *kd, u_long va, u_long *pa)
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if (((u_long)pde & PG_V) == 0)
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goto invalid;
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if ((u_long)pde & PG_PS) {
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/*
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* No second-level page table; ptd describes one 4MB page.
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* (We assume that the kernel wouldn't set PG_PS without enabling
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* it cr0, and that the kernel doesn't support 36-bit physical
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* addresses).
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*/
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#define PAGE4M_MASK (NBPDR - 1)
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#define PG_FRAME4M (~PAGE4M_MASK)
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*pa = ((u_long)pde & PG_FRAME4M) + (va & PAGE4M_MASK);
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return (NBPDR - (va & PAGE4M_MASK));
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}
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pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
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pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t));
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@ -151,6 +151,19 @@ _kvm_vatop(kvm_t *kd, u_long va, u_long *pa)
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if (((u_long)pde & PG_V) == 0)
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goto invalid;
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if ((u_long)pde & PG_PS) {
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/*
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* No second-level page table; ptd describes one 4MB page.
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* (We assume that the kernel wouldn't set PG_PS without enabling
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* it cr0, and that the kernel doesn't support 36-bit physical
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* addresses).
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*/
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#define PAGE4M_MASK (NBPDR - 1)
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#define PG_FRAME4M (~PAGE4M_MASK)
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*pa = ((u_long)pde & PG_FRAME4M) + (va & PAGE4M_MASK);
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return (NBPDR - (va & PAGE4M_MASK));
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}
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pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
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pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t));
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