unsigned long sym_put_size;
unsigned long kv_major;
unsigned long ibt;
+ unsigned long kv_minor;
+ unsigned long blkdev_get_addr;
+ unsigned long blkdev_put_addr;
unsigned long padding[1];
}ko_param;
#define vdebug(fmt, args...) if(kprintf) kprintf(KERN_ERR fmt, ##args)
+static unsigned int g_claim_ptr = 0;
static unsigned char *g_get_patch[MAX_PATCH] = { NULL };
static unsigned char *g_put_patch[MAX_PATCH] = { NULL };
-static void notrace dmpatch_restore_code(unsigned char *opCode)
+static void notrace dmpatch_restore_code(int bytes, unsigned char *opCode, unsigned int code)
{
unsigned long align;
{
align = (unsigned long)opCode / g_ko_param.pgsize * g_ko_param.pgsize;
set_mem_rw(align, 1);
- *opCode = 0x80;
+ if (bytes == 1)
+ {
+ *opCode = (unsigned char)code;
+ }
+ else
+ {
+ *(unsigned int *)opCode = code;
+ }
set_mem_ro(align, 1);
}
}
return 0;
}
+static unsigned long dmpatch_find_call_offset(unsigned long addr, unsigned long size, unsigned long func)
+{
+ unsigned long i = 0;
+ unsigned long dest;
+ unsigned char *opCode = NULL;
+ unsigned char aucOffset[8] = { 0, 0, 0, 0, 0xFF, 0xFF, 0xFF, 0xFF };
+
+ opCode = (unsigned char *)addr;
+
+ for (i = 0; i + 4 < size; i++)
+ {
+ if (opCode[i] == 0xE8)
+ {
+ aucOffset[0] = opCode[i + 1];
+ aucOffset[1] = opCode[i + 2];
+ aucOffset[2] = opCode[i + 3];
+ aucOffset[3] = opCode[i + 4];
+
+ dest = addr + i + 5 + *(unsigned long *)aucOffset;
+ if (dest == func)
+ {
+ return i;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static unsigned int dmpatch_patch_claim_ptr(void)
+{
+ unsigned long i = 0;
+ unsigned long t = 0;
+ unsigned long offset1;
+ unsigned long offset2;
+ unsigned long align;
+ unsigned char *opCode = NULL;
+
+ vdebug("Get addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.blkdev_get_addr);
+ vdebug("Put addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_put_addr, g_ko_param.sym_put_size, g_ko_param.blkdev_put_addr);
+
+ opCode = (unsigned char *)g_ko_param.sym_get_addr;
+ for (i = 0; i < 4; i++)
+ {
+ vdebug("%02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n",
+ opCode[i + 0], opCode[i + 1], opCode[i + 2], opCode[i + 3],
+ opCode[i + 4], opCode[i + 5], opCode[i + 6], opCode[i + 7],
+ opCode[i + 8], opCode[i + 9], opCode[i + 10], opCode[i + 11],
+ opCode[i + 12], opCode[i + 13], opCode[i + 14], opCode[i + 15]);
+ }
+
+ offset1 = dmpatch_find_call_offset(g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.blkdev_get_addr);
+ offset2 = dmpatch_find_call_offset(g_ko_param.sym_put_addr, g_ko_param.sym_put_size, g_ko_param.blkdev_put_addr);
+ if (offset1 == 0 || offset2 == 0)
+ {
+ vdebug("call blkdev_get or blkdev_put Not found, %lu %lu\n", offset1, offset2);
+ return 1;
+ }
+ vdebug("call addr1:0x%lx call addr2:0x%lx\n",
+ g_ko_param.sym_get_addr + offset1,
+ g_ko_param.sym_put_addr + offset2);
+
+ opCode = (unsigned char *)g_ko_param.sym_get_addr;
+ for (i = offset1 - 1, t = 0; (i > 0) && (t < 24); i--, t++)
+ {
+ /* rdx */
+ if (opCode[i] == 0x48 && opCode[i + 1] == 0xc7 && opCode[i + 2] == 0xc2)
+ {
+ g_claim_ptr = *(unsigned int *)(opCode + i + 3);
+ g_get_patch[0] = opCode + i + 3;
+ vdebug("claim_ptr(%08X) found at get addr 0x%lx\n", g_claim_ptr, g_ko_param.sym_get_addr + i + 3);
+ break;
+ }
+ }
+
+ if (g_claim_ptr == 0)
+ {
+ vdebug("Claim_ptr not found in get\n");
+ return 1;
+ }
+
+ opCode = (unsigned char *)g_ko_param.sym_put_addr;
+ for (i = offset2 - 1, t = 0; (i > 0) && (t < 24); i--, t++)
+ {
+ /* rsi */
+ if (opCode[i] == 0x48 && opCode[i + 1] == 0xc7 && opCode[i + 2] == 0xc6)
+ {
+ if (*(unsigned int *)(opCode + i + 3) == g_claim_ptr)
+ {
+ vdebug("claim_ptr found at put addr 0x%lx\n", g_ko_param.sym_put_addr + i + 3);
+ g_put_patch[0] = opCode + i + 3;
+ break;
+ }
+ }
+ }
+
+ if (g_put_patch[0] == 0)
+ {
+ vdebug("Claim_ptr not found in put\n");
+ return 1;
+ }
+
+ align = (unsigned long)g_get_patch[0] / g_ko_param.pgsize * g_ko_param.pgsize;
+ set_mem_rw(align, 1);
+ *(unsigned int *)(g_get_patch[0]) = 0;
+ set_mem_ro(align, 1);
+
+ align = (unsigned long)g_put_patch[0] / g_ko_param.pgsize * g_ko_param.pgsize;
+ set_mem_rw(align, 1);
+ *(unsigned int *)(g_put_patch[0]) = 0;
+ set_mem_ro(align, 1);
+
+ return 0;
+}
+
#ifdef VTOY_IBT
static __always_inline unsigned long long dmpatch_rdmsr(unsigned int msr)
{
kprintf = (printk_pf)(g_ko_param.printk_addr);
- vdebug("dmpatch_init start pagesize=%lu ...\n", g_ko_param.pgsize);
+ vdebug("dmpatch_init start pagesize=%lu kernel=%lu.%lu ...\n",
+ g_ko_param.pgsize, g_ko_param.kv_major, g_ko_param.kv_minor);
if (g_ko_param.struct_size != sizeof(ko_param))
{
reg_kprobe = (kprobe_reg_pf)g_ko_param.reg_kprobe_addr;
unreg_kprobe = (kprobe_unreg_pf)g_ko_param.unreg_kprobe_addr;
- r = dmpatch_replace_code(1, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 2, "dm_get_table_device", g_get_patch);
- if (r && g_ko_param.kv_major >= 5)
+ if (g_ko_param.kv_major > 6 || (g_ko_param.kv_major == 6 && g_ko_param.kv_minor >= 5))
{
- vdebug("new2 patch dm_get_table_device...\n");
- r = dmpatch_replace_code(2, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 1, "dm_get_table_device", g_get_patch);
+ vdebug("new interface patch dm_get_table_device...\n");
+ r = dmpatch_patch_claim_ptr();
}
-
- if (r && g_ko_param.kv_major >= 5)
+ else
{
- vdebug("new3 patch dm_get_table_device...\n");
- r = dmpatch_replace_code(3, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 1, "dm_get_table_device", g_get_patch);
+ r = dmpatch_replace_code(1, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 2, "dm_get_table_device", g_get_patch);
+ if (r && g_ko_param.kv_major >= 5)
+ {
+ vdebug("new2 patch dm_get_table_device...\n");
+ r = dmpatch_replace_code(2, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 1, "dm_get_table_device", g_get_patch);
+ }
+
+ if (r && g_ko_param.kv_major >= 5)
+ {
+ vdebug("new3 patch dm_get_table_device...\n");
+ r = dmpatch_replace_code(3, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 1, "dm_get_table_device", g_get_patch);
+ }
}
-
-
+
if (r)
{
rc = -EINVAL;
}
vdebug("patch dm_get_table_device success\n");
- r = dmpatch_replace_code(1, g_ko_param.sym_put_addr, g_ko_param.sym_put_size, 1, "dm_put_table_device", g_put_patch);
+ if (g_ko_param.kv_major >= 6 && g_ko_param.kv_minor >= 5)
+ {
+ r = 0;
+ }
+ else
+ {
+ r = dmpatch_replace_code(1, g_ko_param.sym_put_addr, g_ko_param.sym_put_size, 1, "dm_put_table_device", g_put_patch);
+ }
if (r)
{
rc = -EINVAL;
msr = dmpatch_ibt_save();
}
- for (i = 0; i < MAX_PATCH; i++)
+ if (g_claim_ptr)
{
- dmpatch_restore_code(g_get_patch[i]);
- dmpatch_restore_code(g_put_patch[i]);
+ dmpatch_restore_code(4, g_get_patch[0], g_claim_ptr);
+ dmpatch_restore_code(4, g_put_patch[0], g_claim_ptr);
+ }
+ else
+ {
+ for (i = 0; i < MAX_PATCH; i++)
+ {
+ dmpatch_restore_code(1, g_get_patch[i], 0x80);
+ dmpatch_restore_code(1, g_put_patch[i], 0x80);
+ }
}
vdebug("dmpatch_exit success\n");
projects / Ventoy.git / blobdiff