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/*
* x86_64.c
*
* Copyright (C) 2006, 2007 NEC Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifdef __x86_64__
#include "makedumpfile.h"
int
is_vmalloc_addr(ulong vaddr)
{
/*
* vmalloc, virtual memmap, and module space as VMALLOC space.
*/
return ((vaddr >= VMALLOC_START && vaddr <= VMALLOC_END)
|| (vaddr >= VMEMMAP_START && vaddr <= VMEMMAP_END)
|| (vaddr >= MODULES_VADDR && vaddr <= MODULES_END));
}
int
get_phys_base_x86_64()
{
int i;
struct pt_load_segment *pls;
/*
* Get the relocatable offset
*/
info->phys_base = 0; /* default/traditional */
for (i = 0; i < info->num_load_memory; i++) {
pls = &info->pt_load_segments[i];
if ((pls->virt_start >= __START_KERNEL_map) &&
!(is_vmalloc_addr(pls->virt_start))) {
info->phys_base = pls->phys_start -
(pls->virt_start & ~(__START_KERNEL_map));
break;
}
}
return TRUE;
}
int
get_machdep_info_x86_64()
{
info->section_size_bits = _SECTION_SIZE_BITS;
info->max_physmem_bits = _MAX_PHYSMEM_BITS;
return TRUE;
}
/*
* Translate a virtual address to a physical address by using 4 levels paging.
*/
unsigned long long
vtop4_x86_64(unsigned long vaddr)
{
unsigned long page_dir, pml4, pgd_paddr, pgd_pte, pmd_paddr, pmd_pte;
unsigned long pte_paddr, pte;
if (SYMBOL(init_level4_pgt) == NOT_FOUND_SYMBOL) {
ERRMSG("Can't get the symbol of init_level4_pgt.\n");
return NOT_PADDR;
}
/*
* Get PGD.
*/
page_dir = SYMBOL(init_level4_pgt);
page_dir += pml4_index(vaddr) * sizeof(unsigned long);
if (!readmem(VADDR, page_dir, &pml4, sizeof pml4)) {
ERRMSG("Can't get pml4 (page_dir:%lx).\n", page_dir);
return NOT_PADDR;
}
if (!(pml4 & _PAGE_PRESENT)) {
ERRMSG("Can't get a valid pml4.\n");
return NOT_PADDR;
}
/*
* Get PUD.
*/
pgd_paddr = pml4 & PHYSICAL_PAGE_MASK;
pgd_paddr += pgd_index(vaddr) * sizeof(unsigned long);
if (!readmem(PADDR, pgd_paddr, &pgd_pte, sizeof pgd_pte)) {
ERRMSG("Can't get pgd_pte (pgd_paddr:%lx).\n", pgd_paddr);
return NOT_PADDR;
}
if (!(pgd_pte & _PAGE_PRESENT)) {
ERRMSG("Can't get a valid pgd_pte.\n");
return NOT_PADDR;
}
/*
* Get PMD.
*/
pmd_paddr = pgd_pte & PHYSICAL_PAGE_MASK;
pmd_paddr += pmd_index(vaddr) * sizeof(unsigned long);
if (!readmem(PADDR, pmd_paddr, &pmd_pte, sizeof pmd_pte)) {
ERRMSG("Can't get pmd_pte (pmd_paddr:%lx).\n", pmd_paddr);
return NOT_PADDR;
}
if (!(pmd_pte & _PAGE_PRESENT)) {
ERRMSG("Can't get a valid pmd_pte.\n");
return NOT_PADDR;
}
if (pmd_pte & _PAGE_PSE)
return (PAGEBASE(pmd_pte) & PHYSICAL_PAGE_MASK)
+ (vaddr & ~_2MB_PAGE_MASK);
/*
* Get PTE.
*/
pte_paddr = pmd_pte & PHYSICAL_PAGE_MASK;
pte_paddr += pte_index(vaddr) * sizeof(unsigned long);
if (!readmem(PADDR, pte_paddr, &pte, sizeof pte)) {
ERRMSG("Can't get pte (pte_paddr:%lx).\n", pte_paddr);
return NOT_PADDR;
}
if (!(pte & _PAGE_PRESENT)) {
ERRMSG("Can't get a valid pte.\n");
return NOT_PADDR;
}
return (PAGEBASE(pte) & PHYSICAL_PAGE_MASK) + PAGEOFFSET(vaddr);
}
off_t
vaddr_to_offset_x86_64(unsigned long vaddr)
{
int i;
off_t offset;
unsigned long phys_base;
unsigned long long paddr;
struct pt_load_segment *pls;
/*
* Check the relocatable kernel.
*/
if (SYMBOL(phys_base) != NOT_FOUND_SYMBOL)
phys_base = info->phys_base;
else
phys_base = 0;
if (is_vmalloc_addr(vaddr)) {
if ((paddr = vtop4_x86_64(vaddr)) == NOT_PADDR) {
ERRMSG("Can't convert a virtual address(%lx) to " \
"physical address.\n", vaddr);
return 0x0;
}
}
else if (vaddr >= __START_KERNEL_map)
paddr = vaddr - __START_KERNEL_map + phys_base;
else
paddr = vaddr - PAGE_OFFSET;
for (i = offset = 0; i < info->num_load_memory; i++) {
pls = &info->pt_load_segments[i];
if ((paddr >= pls->phys_start)
&& (paddr < pls->phys_end)) {
offset = (off_t)(paddr - pls->phys_start) +
pls->file_offset;
break;
}
}
return offset;
}
/*
* for Xen extraction
*/
unsigned long long
kvtop_xen_x86_64(unsigned long kvaddr)
{
unsigned long long dirp, entry;
if (!is_xen_vaddr(kvaddr))
return NOT_PADDR;
if (is_direct(kvaddr))
return (unsigned long)kvaddr - DIRECTMAP_VIRT_START;
if ((dirp = kvtop_xen_x86_64(SYMBOL(pgd_l4))) == NOT_PADDR)
return NOT_PADDR;
dirp += pml4_index(kvaddr) * sizeof(unsigned long long);
if (!readmem(PADDR, dirp, &entry, sizeof(entry)))
return NOT_PADDR;
if (!(entry & _PAGE_PRESENT))
return NOT_PADDR;
dirp = entry & ENTRY_MASK;
dirp += pgd_index(kvaddr) * sizeof(unsigned long long);
if (!readmem(PADDR, dirp, &entry, sizeof(entry)))
return NOT_PADDR;
if (!(entry & _PAGE_PRESENT))
return NOT_PADDR;
dirp = entry & ENTRY_MASK;
dirp += pmd_index(kvaddr) * sizeof(unsigned long long);
if (!readmem(PADDR, dirp, &entry, sizeof(entry)))
return NOT_PADDR;
if (!(entry & _PAGE_PRESENT))
return NOT_PADDR;
if (entry & _PAGE_PSE) {
entry = (entry & ENTRY_MASK) + (kvaddr & ((1UL << PMD_SHIFT) - 1));
return entry;
}
dirp = entry & ENTRY_MASK;
dirp += pte_index(kvaddr) * sizeof(unsigned long long);
if (!readmem(PADDR, dirp, &entry, sizeof(entry)))
return NOT_PADDR;
if (!(entry & _PAGE_PRESENT)) {
return NOT_PADDR;
}
entry = (entry & ENTRY_MASK) + (kvaddr & ((1UL << PTE_SHIFT) - 1));
return entry;
}
int get_xen_info_x86_64()
{
unsigned long frame_table_vaddr;
unsigned long xen_end;
int i;
if (SYMBOL(pgd_l4) == NOT_FOUND_SYMBOL) {
ERRMSG("Can't get pml4.\n");
return FALSE;
}
if (SYMBOL(frame_table) == NOT_FOUND_SYMBOL) {
ERRMSG("Can't get the symbol of frame_table.\n");
return FALSE;
}
if (!readmem(VADDR_XEN, SYMBOL(frame_table), &frame_table_vaddr,
sizeof(frame_table_vaddr))) {
ERRMSG("Can't get the value of frame_table.\n");
return FALSE;
}
info->frame_table_vaddr = frame_table_vaddr;
if (SYMBOL(xenheap_phys_end) == NOT_FOUND_SYMBOL) {
ERRMSG("Can't get the symbol of xenheap_phys_end.\n");
return FALSE;
}
if (!readmem(VADDR_XEN, SYMBOL(xenheap_phys_end), &xen_end,
sizeof(xen_end))) {
ERRMSG("Can't get the value of xenheap_phys_end.\n");
return FALSE;
}
info->xen_heap_end = (xen_end >> PAGESHIFT());
info->xen_heap_start = 0;
/*
* pickled_id == domain addr for x86_64
*/
for (i = 0; i < info->num_domain; i++) {
info->domain_list[i].pickled_id =
info->domain_list[i].domain_addr;
}
return TRUE;
}
#endif /* x86_64 */
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