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cosemtic changes

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This commit is contained in:
Stefan Lankes 2011-04-08 15:56:22 +02:00
parent 8868900e19
commit ab78beb859
1 changed files with 9 additions and 7 deletions
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16
arch/x86/kernel/gdt.c
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@ -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();