diff --git a/arch/x86/kernel/gdt.c b/arch/x86/kernel/gdt.c index 084f071c..b4fd61ae 100644 --- a/arch/x86/kernel/gdt.c +++ b/arch/x86/kernel/gdt.c @@ -69,6 +69,8 @@ int arch_fork(task_t* task) memcpy(kstacks[id], kstacks[curr_task->id], KERNEL_STACK_SIZE); task_state_segments[id].cr3 = (uint32_t) (virt_to_phys((size_t)task->pgd)); task_state_segments[id].eflags = read_eflags(); + // the parent task will enable the IF flag + task_state_segments[id].eflags |= (1 << 9); task_state_segments[id].esp0 = (uint32_t) kstacks[id] + KERNEL_STACK_SIZE - sizeof(size_t); asm volatile("mov %%esp, %0" : "=r"(task_state_segments[id].esp)); @@ -76,18 +78,18 @@ int arch_fork(task_t* task) task_state_segments[id].esp += (uint32_t) kstacks[id]; asm volatile ("pusha"); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].edi)); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].esi)); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].ebp)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].edi)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].esi)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].ebp)); #ifdef WITH_FRAME_POINTER task_state_segments[id].ebp -= (uint32_t) kstacks[curr_task->id]; task_state_segments[id].ebp += (uint32_t) kstacks[id]; #endif asm volatile ("add $4, %%esp" ::: "%esp"); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].ebx)); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].edx)); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].ecx)); - asm volatile ("pop %%eax" : "=a"(task_state_segments[id].eax)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].ebx)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].edx)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].ecx)); + asm volatile ("pop %0" : "=r"(task_state_segments[id].eax)); // This will be the entry point for the new task. task_state_segments[id].eip = read_eip();