<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">Hi, I added the code, but I am still getting mismatch for following kernel virtual addresses. <ignore the text, its my writing, but adding below patch did not help > looks like we have to check 20th bit and take it into consideration. Physical address mismatch detected @ section @ vaddress :0xc0100000 and phy_addr : 0x82000000 corrupt page tables;invalid virtual address 0xC0100000 Physical address mismatch detected @ section @ vaddress :0xc0100004 and phy_addr : 0x82000004 corrupt page tables;invalid virtual address 0xC0100004 Physical address mismatch detected @ section @ vaddress :0xc0100008 and phy_addr : 0x82000008 corrupt page tables;invalid virtual address 0xC0100008 Physical address mismatch detected @ section @ vaddress :0xc010000c and phy_addr : 0x8200000C corrupt page tables;invalid virtual address 0xC010000C Physical address mismatch detected @ section @ vaddress :0xc0100010 and phy_addr : 0x82000010 corrupt page tables;invalid virtual address 0xC0100010 Physical address mismatch detected @ section @ vaddress :0xc0100014 and phy_addr : 0x82000014 corrupt page tables;invalid virtual address 0xC0100014 Physical address mismatch detected @ section @ vaddress :0xc0100018 and phy_addr : 0x82000018 corrupt page tables;invalid virtual address 0xC0100018 Physical address mismatch detected @ section @ vaddress :0xc010001c and phy_addr : 0x8200001C corrupt page tables;invalid virtual address 0xC010001C Physical address mismatch detected @ section @ vaddress :0xc0100020 and phy_addr : 0x82000020 corrupt page tables;invalid virtual address 0xC0100020 Physical address mismatch detected @ section @ vaddress :0xc0100024 and phy_addr : 0x82000024 corrupt page tables;invalid virtual address 0xC0100024 Physical address mismatch detected @ section @ vaddress :0xc0100028 and phy_addr : 0x82000028 corrupt page tables;invalid virtual address 0xC0100028 Physical address mismatch detected @ section @ vaddress :0xc010002c and phy_addr : 0x8200002C corrupt page tables;invalid virtual address 0xC010002C Physical address mism Regards, Oza. <div> </div><div> </div> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> From: Rabin Vincent <rabin@rab.in> To: "Discussion list for crash utility usage, maintenance and development" <crash-utility@redhat.com> Cc: Thomas Fänge <thomas.fange@sonymobile.com> Sent: Thursday, 4 October 2012 2:35 PM Subject: Re: [Crash-utility] using crash for ARM </div> 2012/10/4 Mika Westerberg <<a ymailto="mailto:mika.westerberg@iki.fi" href="mailto:mika.westerberg@iki.fi">mika.westerberg@iki.fi</a>>: > The unity-mapped region is mapped using 1MB pages. However, we actually have > (when using the Linux ARM 2-level translation scheme): > > see arch/arm/include/asm/pgtable-2level.h: > > #define PMD_SHIFT 21 > #define PGDIR_SHIFT 21 > > #define PTRS_PER_PGD 2048 > > So we have 2048 entries in a PGD instead of 4096 making a PGD entry an array > of "two pointers". > > Anyway as you and Paawan suggested it looks like a bug - we always use the > first entry instead of the second given that bit 20 is set in the virtual > address. Isn't the problem actually that we read the section entry wrong? The following (and attached) is the fix I've been using for this. Rabin diff --git a/arm.c b/arm.c index 5930c02..4e7b6dc 100644 --- a/arm.c +++ b/arm.c @@ -957,12 +957,14 @@ arm_vtop(ulong vaddr, ulong *pgd, physaddr_t *paddr, int verbose) MKSTR((ulong)page_middle)), pmd_pte); if ((pmd_pte & PMD_TYPE_MASK) == PMD_TYPE_SECT) { + ulong sectionbase = pmd_pte & _SECTION_PAGE_MASK; + if (verbose) { fprintf(fp, " PAGE: %s (1MB)\n\n", mkstring(buf, VADDR_PRLEN, RJUST | LONG_HEX, - MKSTR(PAGEBASE(pmd_pte)))); + MKSTR(sectionbase))); } - *paddr = PAGEBASE(pmd_pte) + (vaddr & ~_SECTION_PAGE_MASK); + *paddr = sectionbase + (vaddr & ~_SECTION_PAGE_MASK); return TRUE; } -- Crash-utility mailing list <a ymailto="mailto:Crash-utility@redhat.com" href="mailto:Crash-utility@redhat.com">Crash-utility@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/crash-utility" target="_blank">https://www.redhat.com/mailman/listinfo/crash-utility</a> </div> </div> </div></body></html>