/* * 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); }