*/
-
+#ifdef CONFIG_SHADOW_CACHE
static inline int activate_shadow_pt_32(struct guest_info * core) {
struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(core->ctrl_regs.cr3);
struct cr3_32 * guest_cr3 = (struct cr3_32 *)&(core->shdw_pg_state.guest_cr3);
- struct shadow_page_data * shdw_page = create_new_shadow_pt(core);
+
+ struct shadow_page_cache_data * shdw_page;
+
+ if (core->n_free_shadow_pages < MIN_FREE_SHADOW_PAGES) {
+ shadow_free_some_pages(core);
+ }
+
+ shdw_page = shadow_page_get_page(core, (addr_t)(guest_cr3->pdt_base_addr), 2, 0, 0, 0, 0);
+ PrintDebug("act shdw pt: gcr3 %p\n",(void *)BASE_TO_PAGE_ADDR(guest_cr3->pdt_base_addr));
shdw_page->cr3 = shdw_page->page_pa;
* *
* *
*/
-static int handle_4MB_shadow_pagefault_32(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
+
+static inline int fix_read_pf_32(pte32_t * shadow_pte, uint_t vmm_info) {
+ PrintDebug("\trdipf, start vmm_info %d\n",vmm_info);
+ if((vmm_info & PT_USER_MASK) && !(shadow_pte->user_page)) {
+ shadow_pte->user_page = 1;
+ shadow_pte->writable = 0;
+ return 1;
+ }
+ return 0;
+}
+
+static inline int fix_write_pf_32(struct guest_info * core, pte32_t * shadow_pte, pte32_t * guest_pte,
+ int user, int * write_pt, addr_t guest_fn, uint_t vmm_info) {
+
+ int writable_shadow;
+ struct cr0_32 * guest_cr0;
+ struct shadow_page_cache_data * page;
+ *write_pt = 0;
+
+ PrintDebug("\twripf, start vmm_info %d\n",vmm_info);
+
+ if(shadow_pte->writable) {
+ return 0;
+ }
+
+ PrintDebug("\twrpf: pass writable\n");
+
+ writable_shadow = vmm_info & PT_WRITABLE_MASK;
+
+ PrintDebug("\twrpf: writable_shadow %d\n",writable_shadow);
+
+ if(user) {
+ if(!(vmm_info & PT_USER_MASK) || !writable_shadow) {
+ PrintDebug("\twrpf: 1st usr chk\n");
+ return 0;
+ }
+ } else {
+ if(!writable_shadow) {
+ guest_cr0 = (struct cr0_32 *)&(core->shdw_pg_state.guest_cr0);
+ PrintDebug("\twrpf: wp %d\n",guest_cr0->wp);
+
+ if (guest_cr0->wp) {
+ return 0;
+ }
+ shadow_pte->user_page = 0;
+ }
+ }
+
+ if (guest_pte->present == 0) {
+ memset((void *)shadow_pte, 0, sizeof(struct pte32));
+ PrintDebug("\twrpf: guest non present\n");
+ return 0;
+ }
+
+ if (user) {
+ while ((page = shadow_page_lookup_page(core, guest_fn, 0)) != NULL) {
+ shadow_zap_page(core,page);
+ }
+
+ PrintDebug("\twrpf: zap\n");
+
+ } else if((page = shadow_page_lookup_page(core, guest_fn,0)) != NULL) {
+ if ((page = shadow_page_lookup_page(core, guest_fn,0)) != NULL) {
+ guest_pte->dirty = 1;
+ *write_pt = 1;
+ PrintDebug("\twrpf: write need\n");
+ return 0;
+ }
+ }
+
+ shadow_pte->writable = 1; //will lost every pt update trap not sure for this
+ guest_pte->dirty = 1;
+
+ rmap_add(core, (addr_t)shadow_pte);
+
+ PrintDebug("\twrpf: on writable\n");
+ return 1;
+}
+
+#endif
+
+
+static int handle_4MB_shadow_pagefault_32(struct guest_info * core, addr_t fault_addr, pf_error_t error_code,
pte32_t * shadow_pt, pde32_4MB_t * large_guest_pde);
-static int handle_pte_shadow_pagefault_32(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
+static int handle_pte_shadow_pagefault_32(struct guest_info * core, addr_t fault_addr, pf_error_t error_code,
pte32_t * shadow_pt, pte32_t * guest_pt);
-static inline int handle_shadow_pagefault_32(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
+static inline int handle_shadow_pagefault_32(struct guest_info * core, addr_t fault_addr, pf_error_t error_code) {
pde32_t * guest_pd = NULL;
- pde32_t * shadow_pd = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
- addr_t guest_cr3 = CR3_TO_PDE32_PA(info->shdw_pg_state.guest_cr3);
+ pde32_t * shadow_pd = CR3_TO_PDE32_VA(core->ctrl_regs.cr3);
+ addr_t guest_cr3 = CR3_TO_PDE32_PA(core->shdw_pg_state.guest_cr3);
pt_access_status_t guest_pde_access;
pt_access_status_t shadow_pde_access;
pde32_t * guest_pde = NULL;
PrintDebug("Shadow page fault handler: %p\n", (void*) fault_addr );
PrintDebug("Handling PDE32 Fault\n");
- if (guest_pa_to_host_va(info, guest_cr3, (addr_t*)&guest_pd) == -1) {
+ if (guest_pa_to_host_va(core, guest_cr3, (addr_t*)&guest_pd) == -1) {
PrintError("Invalid Guest PDE Address: 0x%p\n", (void *)guest_cr3);
return -1;
}
if (v3_is_guest_pf(guest_pde_access, shadow_pde_access) == 1) {
PrintDebug("Injecting PDE pf to guest: (guest access error=%d) (shdw access error=%d) (pf error code=%d)\n",
*(uint_t *)&guest_pde_access, *(uint_t *)&shadow_pde_access, *(uint_t *)&error_code);
- if (v3_inject_guest_pf(info, fault_addr, error_code) == -1) {
+ if (v3_inject_guest_pf(core, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault for vaddr %p\n", (void *)fault_addr);
return -1;
}
PrintDebug("Shadow Paging User access error (shadow_pde_access=0x%x, guest_pde_access=0x%x)\n",
shadow_pde_access, guest_pde_access);
- if (v3_inject_guest_pf(info, fault_addr, error_code) == -1) {
+ if (v3_inject_guest_pf(core, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault for vaddr %p\n", (void *)fault_addr);
return -1;
}
} else if ((shadow_pde_access != PT_ACCESS_NOT_PRESENT) &&
(shadow_pde_access != PT_ACCESS_OK)) {
// inject page fault in guest
- if (v3_inject_guest_pf(info, fault_addr, error_code) == -1) {
+ if (v3_inject_guest_pf(core, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault for vaddr %p\n", (void *)fault_addr);
return -1;
}
// Get the next shadow page level, allocate if not present
if (shadow_pde_access == PT_ACCESS_NOT_PRESENT) {
- struct shadow_page_data * shdw_page = create_new_shadow_pt(info);
+ struct shadow_page_data * shdw_page = create_new_shadow_pt(core);
shadow_pt = (pte32_t *)V3_VAddr((void *)shdw_page->page_pa);
shadow_pde->present = 1;
if (guest_pde->large_page == 0) {
- if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr), (addr_t*)&guest_pt) == -1) {
+ if (guest_pa_to_host_va(core, BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr), (addr_t*)&guest_pt) == -1) {
// Machine check the guest
PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr));
- v3_raise_exception(info, MC_EXCEPTION);
+ v3_raise_exception(core, MC_EXCEPTION);
return 0;
}
- if (handle_pte_shadow_pagefault_32(info, fault_addr, error_code, shadow_pt, guest_pt) == -1) {
+ if (handle_pte_shadow_pagefault_32(core, fault_addr, error_code, shadow_pt, guest_pt) == -1) {
PrintError("Error handling Page fault caused by PTE\n");
return -1;
}
} else {
- if (handle_4MB_shadow_pagefault_32(info, fault_addr, error_code, shadow_pt, (pde32_4MB_t *)guest_pde) == -1) {
+ if (handle_4MB_shadow_pagefault_32(core, fault_addr, error_code, shadow_pt, (pde32_4MB_t *)guest_pde) == -1) {
PrintError("Error handling large pagefault\n");
return -1;
}
}
-static int handle_pte_shadow_pagefault_32(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
+static int handle_pte_shadow_pagefault_32(struct guest_info * core, addr_t fault_addr, pf_error_t error_code,
pte32_t * shadow_pt, pte32_t * guest_pt) {
pt_access_status_t guest_pte_access;
pte32_t * shadow_pte = (pte32_t *)&(shadow_pt[PTE32_INDEX(fault_addr)]);
addr_t guest_pa = BASE_TO_PAGE_ADDR((addr_t)(guest_pte->page_base_addr)) + PAGE_OFFSET(fault_addr);
- struct v3_shadow_region * shdw_reg = v3_get_shadow_region(info->vm_info, info->cpu_id, guest_pa);
+ struct v3_shadow_region * shdw_reg = v3_get_shadow_region(core->vm_info, core->cpu_id, guest_pa);
if (shdw_reg == NULL) {
// Inject a machine check in the guest
PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
- v3_raise_exception(info, MC_EXCEPTION);
+ v3_raise_exception(core, MC_EXCEPTION);
return 0;
}
// inject:
- if (v3_inject_guest_pf(info, fault_addr, error_code) == -1) {
+ if (v3_inject_guest_pf(core, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault for vaddr %p\n", (void *)fault_addr);
return -1;
}
if ((shdw_reg->host_type == SHDW_REGION_ALLOCATED) ||
(shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
- addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, info->cpu_id, guest_pa);
+ addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, core->cpu_id, guest_pa);
shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
} else {
// Page fault handled by hook functions
- if (v3_handle_mem_full_hook(info, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
+ if (v3_handle_mem_full_hook(core, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
PrintError("Special Page fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
guest_pte->dirty = 1;
if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
- if (v3_handle_mem_wr_hook(info, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
+ if (v3_handle_mem_wr_hook(core, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
PrintError("Special Page fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
} else {
// Inject page fault into the guest
- if (v3_inject_guest_pf(info, fault_addr, error_code) == -1) {
+ if (v3_inject_guest_pf(core, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault for vaddr %p\n", (void *)fault_addr);
return -1;
}
-static int handle_4MB_shadow_pagefault_32(struct guest_info * info,
+static int handle_4MB_shadow_pagefault_32(struct guest_info * core,
addr_t fault_addr, pf_error_t error_code,
pte32_t * shadow_pt, pde32_4MB_t * large_guest_pde)
{
PrintDebug("Handling 4MB fault (guest_fault_pa=%p) (error_code=%x)\n", (void *)guest_fault_pa, *(uint_t*)&error_code);
PrintDebug("ShadowPT=%p, LargeGuestPDE=%p\n", shadow_pt, large_guest_pde);
- struct v3_shadow_region * shdw_reg = v3_get_shadow_region(info->vm_info, info->cpu_id, guest_fault_pa);
+ struct v3_shadow_region * shdw_reg = v3_get_shadow_region(core->vm_info, core->cpu_id, guest_fault_pa);
if (shdw_reg == NULL) {
// Inject a machine check in the guest
PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
- v3_raise_exception(info, MC_EXCEPTION);
+ v3_raise_exception(core, MC_EXCEPTION);
return -1;
}
if ((shdw_reg->host_type == SHDW_REGION_ALLOCATED) ||
(shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
- addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, info->cpu_id, guest_fault_pa);
+ addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, core->cpu_id, guest_fault_pa);
shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
//
} else {
- if (v3_handle_mem_full_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
+ if (v3_handle_mem_full_hook(core, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
- if (v3_handle_mem_wr_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
+ if (v3_handle_mem_wr_hook(core, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
return -1;
}
/* If we start to optimize we should look up the guest pages in the cache... */
-static inline int handle_shadow_invlpg_32(struct guest_info * info, addr_t vaddr) {
- pde32_t * shadow_pd = (pde32_t *)CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
+static inline int handle_shadow_invlpg_32(struct guest_info * core, addr_t vaddr) {
+ pde32_t * shadow_pd = (pde32_t *)CR3_TO_PDE32_VA(core->ctrl_regs.cr3);
pde32_t * shadow_pde = (pde32_t *)&shadow_pd[PDE32_INDEX(vaddr)];
- addr_t guest_cr3 = CR3_TO_PDE32_PA(info->shdw_pg_state.guest_cr3);
+ addr_t guest_cr3 = CR3_TO_PDE32_PA(core->shdw_pg_state.guest_cr3);
pde32_t * guest_pd = NULL;
pde32_t * guest_pde;
- if (guest_pa_to_host_va(info, guest_cr3, (addr_t*)&guest_pd) == -1) {
+ if (guest_pa_to_host_va(core, guest_cr3, (addr_t*)&guest_pd) == -1) {
PrintError("Invalid Guest PDE Address: 0x%p\n", (void *)guest_cr3);
return -1;
}
}
return 0;
}
+
+#endif
