diff options
Diffstat (limited to 'src/kernel/user/process.c')
| -rw-r--r-- | src/kernel/user/process.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/src/kernel/user/process.c b/src/kernel/user/process.c index 0f4892d..579c33d 100644 --- a/src/kernel/user/process.c +++ b/src/kernel/user/process.c @@ -118,6 +118,10 @@ pagedir_t *proc_pagedir(process_t *p) { return p->pd; } +int proc_pid(process_t *p) { + return p->pid; +} + // ================================== // // MANAGING FILESYSTEMS FOR PROCESSES // // ================================== // @@ -143,7 +147,7 @@ fs_t *proc_find_fs(process_t *p, const char* name) { // USER MEMORY REGION MANAGEMENT // // ============================= // -static user_region_t *find_user_region(process_t *proc, void* addr) { +static user_region_t *find_user_region(process_t *proc, const void* addr) { for (user_region_t *it = proc->regions; it != 0; it = it->next) { if (addr >= it->addr && addr < it->addr + it->size) return it; } @@ -287,4 +291,24 @@ static void proc_usermem_pf(void* p, registers_t *regs, void* addr) { } } +void probe_for_read(const void* addr, size_t len) { + process_t *proc = current_process(); + user_region_t *r = find_user_region(proc, addr); + if (r == 0 || addr + len > r->addr + r->size || !(r->mode & MM_READ)) { + dbg_printf("Access violation on read at 0x%p len 0x%p in process %d : exiting.\n", + addr, len, proc->pid); + exit(); + } +} + +void probe_for_write(const void* addr, size_t len) { + process_t *proc = current_process(); + user_region_t *r = find_user_region(proc, addr); + if (r == 0 || addr + len > r->addr + r->size || !(r->mode & MM_WRITE)) { + dbg_printf("Access violation on write at 0x%p len 0x%p in process %d : exiting.\n", + addr, len, proc->pid); + exit(); + } +} + /* vim: set ts=4 sw=4 tw=0 noet :*/ |