/*
* Write bytes to kernel address space for debugger.
*/
void
db_write_bytes(vm_offset_t addr, size_t size, char *data)
{
char *dst;
#if 0
vpte_t *ptep0 = NULL;
vpte_t oldmap0 = 0;
vm_offset_t addr1;
vpte_t *ptep1 = NULL;
vpte_t oldmap1 = 0;
#endif
db_nofault = &db_jmpbuf;
#if 0
if (addr > trunc_page((vm_offset_t)btext) - size &&
addr < round_page((vm_offset_t)etext)) {
ptep0 = pmap_kpte(addr);
oldmap0 = *ptep0;
*ptep0 |= VPTE_RW;
/* Map another page if the data crosses a page boundary. */
if ((*ptep0 & PG_PS) == 0) {
addr1 = trunc_page(addr + size - 1);
if (trunc_page(addr) != addr1) {
ptep1 = pmap_kpte(addr1);
oldmap1 = *ptep1;
*ptep1 |= VPTE_RW;
}
} else {
addr1 = trunc_4mpage(addr + size - 1);
if (trunc_4mpage(addr) != addr1) {
ptep1 = pmap_kpte(addr1);
oldmap1 = *ptep1;
*ptep1 |= VPTE_RW;
}
}
cpu_invltlb();
}
#endif
dst = (char *)addr;
while (size-- > 0)
*dst++ = *data++;
db_nofault = NULL;
#if 0
if (ptep0) {
*ptep0 = oldmap0;
if (ptep1)
*ptep1 = oldmap1;
cpu_invltlb();
}
#endif
}
/*
* Write bytes to kernel address space for debugger.
*/
int
db_write_bytes(vm_offset_t addr, size_t size, char *data)
{
jmp_buf jb;
void *prev_jb;
char *dst;
pt_entry_t *ptep0 = NULL;
pt_entry_t oldmap0 = 0;
vm_offset_t addr1;
pt_entry_t *ptep1 = NULL;
pt_entry_t oldmap1 = 0;
int ret;
prev_jb = kdb_jmpbuf(jb);
ret = setjmp(jb);
if (ret == 0) {
if (addr > trunc_page((vm_offset_t)btext) - size &&
addr < round_page((vm_offset_t)etext)) {
ptep0 = pmap_pte(kernel_pmap, addr);
oldmap0 = *ptep0;
*ptep0 |= PG_RW;
/*
* Map another page if the data crosses a page
* boundary.
*/
if ((*ptep0 & PG_PS) == 0) {
addr1 = trunc_page(addr + size - 1);
if (trunc_page(addr) != addr1) {
ptep1 = pmap_pte(kernel_pmap, addr1);
oldmap1 = *ptep1;
*ptep1 |= PG_RW;
}
} else {
addr1 = trunc_4mpage(addr + size - 1);
if (trunc_4mpage(addr) != addr1) {
ptep1 = pmap_pte(kernel_pmap, addr1);
oldmap1 = *ptep1;
*ptep1 |= PG_RW;
}
}
invltlb();
}
dst = (char *)addr;
while (size-- > 0)
*dst++ = *data++;
}
(void)kdb_jmpbuf(prev_jb);
if (ptep0) {
*ptep0 = oldmap0;
if (ptep1)
*ptep1 = oldmap1;
invltlb();
}
return (ret);
}
