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#include <sys/ptrace.h>
#include <sys/wait.h>
#include "xc_private.h"
#include "xg_private.h"
#include "xc_ptrace.h"
#include <time.h>
/* XXX application state */
static int current_is_hvm = 0;
static long nr_pages = 0;
static unsigned long *p2m_array = NULL;
static unsigned long *m2p_array = NULL;
static unsigned long pages_offset;
static unsigned long cr3[MAX_VIRT_CPUS];
/* --------------------- */
static unsigned long
map_mtop_offset(unsigned long ma)
{
return pages_offset + (m2p_array[ma >> PAGE_SHIFT] << PAGE_SHIFT);
return 0;
}
void *
map_domain_va_core(unsigned long domfd, int cpu, void *guest_va,
vcpu_guest_context_t *ctxt)
{
unsigned long pde, page;
unsigned long va = (unsigned long)guest_va;
void *v;
static unsigned long cr3_phys[MAX_VIRT_CPUS];
static unsigned long *cr3_virt[MAX_VIRT_CPUS];
static unsigned long pde_phys[MAX_VIRT_CPUS];
static unsigned long *pde_virt[MAX_VIRT_CPUS];
static unsigned long page_phys[MAX_VIRT_CPUS];
static unsigned long *page_virt[MAX_VIRT_CPUS];
if (cr3[cpu] != cr3_phys[cpu])
{
cr3_phys[cpu] = cr3[cpu];
if (cr3_virt[cpu])
munmap(cr3_virt[cpu], PAGE_SIZE);
v = mmap(
NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE, domfd,
map_mtop_offset(xen_cr3_to_pfn(cr3_phys[cpu])));
if (v == MAP_FAILED)
{
perror("mmap failed");
return NULL;
}
cr3_virt[cpu] = v;
}
if ((pde = cr3_virt[cpu][l2_table_offset_i386(va)]) == 0) /* logical address */
return NULL;
if (current_is_hvm)
pde = p2m_array[pde >> PAGE_SHIFT] << PAGE_SHIFT;
if (pde != pde_phys[cpu])
{
pde_phys[cpu] = pde;
if (pde_virt[cpu])
munmap(pde_virt[cpu], PAGE_SIZE);
v = mmap(
NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE, domfd,
map_mtop_offset(pde_phys[cpu]));
if (v == MAP_FAILED)
return NULL;
pde_virt[cpu] = v;
}
if ((page = pde_virt[cpu][l1_table_offset_i386(va)]) == 0) /* logical address */
return NULL;
if (current_is_hvm)
page = p2m_array[page >> PAGE_SHIFT] << PAGE_SHIFT;
if (page != page_phys[cpu])
{
page_phys[cpu] = page;
if (page_virt[cpu])
munmap(page_virt[cpu], PAGE_SIZE);
v = mmap(
NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE, domfd,
map_mtop_offset(page_phys[cpu]));
if (v == MAP_FAILED)
{
IPRINTF("cr3 %lx pde %lx page %lx pti %lx\n", cr3[cpu], pde, page, l1_table_offset_i386(va));
page_phys[cpu] = 0;
return NULL;
}
page_virt[cpu] = v;
}
return (void *)(((unsigned long)page_virt[cpu]) | (va & BSD_PAGE_MASK));
}
int
xc_waitdomain_core(
int xc_handle,
int domfd,
int *status,
int options,
vcpu_guest_context_t *ctxt)
{
int nr_vcpus;
int i;
xc_core_header_t header;
if ( nr_pages == 0 )
{
if (read(domfd, &header, sizeof(header)) != sizeof(header))
return -1;
current_is_hvm = (header.xch_magic == XC_CORE_MAGIC_HVM);
if ( !current_is_hvm && (header.xch_magic != XC_CORE_MAGIC) )
{
IPRINTF("Magic number missmatch: 0x%08x (file) != "
" 0x%08x (code)\n", header.xch_magic,
XC_CORE_MAGIC);
return -1;
}
nr_pages = header.xch_nr_pages;
nr_vcpus = header.xch_nr_vcpus;
pages_offset = header.xch_pages_offset;
if (read(domfd, ctxt, sizeof(vcpu_guest_context_t)*nr_vcpus) !=
sizeof(vcpu_guest_context_t)*nr_vcpus)
return -1;
for (i = 0; i < nr_vcpus; i++)
cr3[i] = ctxt[i].ctrlreg[3];
if ((p2m_array = malloc(nr_pages * sizeof(unsigned long))) == NULL)
{
IPRINTF("Could not allocate p2m_array\n");
return -1;
}
if (read(domfd, p2m_array, sizeof(unsigned long)*nr_pages) !=
sizeof(unsigned long)*nr_pages)
return -1;
if ((m2p_array = malloc((1<<20) * sizeof(unsigned long))) == NULL)
{
IPRINTF("Could not allocate m2p array\n");
return -1;
}
bzero(m2p_array, sizeof(unsigned long)* 1 << 20);
for (i = 0; i < nr_pages; i++)
m2p_array[p2m_array[i]] = i;
}
return 0;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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