Date: Mon, 10 Dec 2012 05:14:35 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r244077 - head/sys/amd64/amd64 Message-ID: <201212100514.qBA5EZFE027334@svn.freebsd.org>
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Author: kib Date: Mon Dec 10 05:14:34 2012 New Revision: 244077 URL: http://svnweb.freebsd.org/changeset/base/244077 Log: Add amd64-specific ddb command "show pte". The command displays the hierarchy of the page table entries which map the specified address. Reviewed by: alc (previous version) Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/amd64/amd64/pmap.c Modified: head/sys/amd64/amd64/pmap.c ============================================================================== --- head/sys/amd64/amd64/pmap.c Mon Dec 10 05:14:04 2012 (r244076) +++ head/sys/amd64/amd64/pmap.c Mon Dec 10 05:14:34 2012 (r244077) @@ -5446,3 +5446,46 @@ pmap_align_superpage(vm_object_t object, else *addr = ((*addr + PDRMASK) & ~PDRMASK) + superpage_offset; } + +#include "opt_ddb.h" +#ifdef DDB +#include <ddb/ddb.h> + +DB_SHOW_COMMAND(pte, pmap_print_pte) +{ + pmap_t pmap; + pml4_entry_t *pml4; + pdp_entry_t *pdp; + pd_entry_t *pde; + pt_entry_t *pte; + vm_offset_t va; + + if (have_addr) { + va = (vm_offset_t)addr; + pmap = PCPU_GET(curpmap); /* XXX */ + } else { + db_printf("show pte addr\n"); + return; + } + pml4 = pmap_pml4e(pmap, va); + db_printf("VA %#016lx pml4e %#016lx", va, *pml4); + if ((*pml4 & PG_V) == 0) { + db_printf("\n"); + return; + } + pdp = pmap_pml4e_to_pdpe(pml4, va); + db_printf(" pdpe %#016lx", *pdp); + if ((*pdp & PG_V) == 0 || (*pdp & PG_PS) != 0) { + db_printf("\n"); + return; + } + pde = pmap_pdpe_to_pde(pdp, va); + db_printf(" pde %#016lx", *pde); + if ((*pde & PG_V) == 0 || (*pde & PG_PS) != 0) { + db_printf("\n"); + return; + } + pte = pmap_pde_to_pte(pde, va); + db_printf(" pte %#016lx\n", *pte); +} +#endif
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