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Code Issues Releases Wiki Activity

remove typo, fine tuning of the stack alignment

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This commit is contained in:
Stefan Lankes 2016-05-14 08:38:01 +02:00
parent 2699e22032
commit 387c3beb3f
1 changed files with 3 additions and 2 deletions
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5
hermit/arch/x86/kernel/tasks.c
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@ -68,7 +68,7 @@ size_t* get_current_stack(void)
if (curr_task->status == TASK_IDLE)
stptr += KERNEL_STACK_SIZE - 0x10;
else
stptr = (stptr + DEFAULT_STACK_SIZE - 1) & ~0x1F;
stptr = (stptr + DEFAULT_STACK_SIZE - sizeof(size_t)) & ~0x1F;
set_per_core(kernel_stack, stptr);
tss_set_rsp0(stptr);
@ -96,7 +96,8 @@ int create_default_frame(task_t* task, entry_point_t ep, void* arg, uint32_t cor
* and not for HW-task-switching is setting up a stack and not a TSS.
* This is the stack which will be activated and popped off for iret later.
*/
stack = (size_t*) (((size_t) task->stack + DEFAULT_STACK_SIZE - 1) & ~0x1F); // => stack is 16byte aligned
stack = (size_t*) (((size_t) task->stack + DEFAULT_STACK_SIZE - sizeof(size_t)) & ~0x1F); // => stack is 32byte aligned
stack += sizeof(size_t);
/* Only marker for debugging purposes, ... */
*stack-- = 0xDEADBEEF;