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Tasks now have separate address spaces

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When switchTask loads the stack, the next push intruction fails, but the 
stack can be manually accessed fine.
This commit is contained in:
pjht 2019-03-23 10:35:11 -05:00
parent 9caf48cb6d
commit 2b65782369
1 changed files with 6 additions and 2 deletions
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8
cpu/i386/tasking.c
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@ -38,8 +38,12 @@ static Task* createTaskKmode(void* eip,char kmode) {
task->regs.edi=0;
asm volatile("pushfl; movl (%%esp), %%eax; movl %%eax, %0; popfl;":"=m"(task->regs.eflags)::"%eax");
task->regs.eip=(uint32_t)eip;
asm volatile("movl %%cr3, %%eax; movl %%eax, %0;":"=m"(task->regs.cr3)::"%eax");
task->regs.cr3=new_address_space();
uint32_t cr3;
asm volatile("movl %%cr3, %%eax; movl %%eax, %0;":"=m"(cr3)::"%eax");
load_address_space(task->regs.cr3);
task->regs.esp=(uint32_t)alloc_memory(1);
load_address_space(cr3);
task->regs.ebp=0;
task->msg_store=NULL;
task->rd=0;
@ -119,7 +123,7 @@ void tasking_yield() {
}
Task* oldCurr=currentTask;
currentTask=task;
asm("mov %%eax,%%cr3":: "a"(task->regs.cr3));
// load_address_space(task->regs.cr3);
if (!task->kmode) {
asm volatile(" \
cli; \