diff options
Diffstat (limited to 'src/kernel/user')
| -rw-r--r-- | src/kernel/user/process.c | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/src/kernel/user/process.c b/src/kernel/user/process.c index 7b51370..9f3e2b1 100644 --- a/src/kernel/user/process.c +++ b/src/kernel/user/process.c @@ -66,12 +66,50 @@ process_t *new_process(process_t *parent) { return proc; } -static void run_user_code(void* data) { - // TODO - exit(); +static void run_user_code(void* entry) { + process_t *proc = current_thread->proc; + ASSERT(proc != 0); + + switch_pagedir(proc->pd); + + void* esp = (void*)USERSTACK_ADDR + USERSTACK_SIZE; + + asm volatile(" + cli; + + mov $0x23, %%ax; + mov %%ax, %%ds; + mov %%ax, %%es; + mov %%ax, %%fs; + mov %%ax, %%gs; + + pushl $0x23; + pushl %%ebx; + pushf; + pop %%eax; + or $0x200, %%eax; + pushl %%eax; + pushl $0x1B; + pushl %%ecx; + iret + "::"b"(esp),"c"(entry)); } bool start_process(process_t *p, void* entry) { - // TODO + bool stack_ok = mmap(p, (void*)USERSTACK_ADDR, USERSTACK_SIZE, MM_READ | MM_WRITE); + if (!stack_ok) return false; + + thread_t *th = new_thread(run_user_code, entry); + if (th == 0) { + munmap(p, (void*)USERSTACK_ADDR); + return false; + } + + th->proc = p; + th->kmem_violation_handler = proc_kmem_violation; + + resume_thread(th, false); + + return true; } // ================================== // |