drew/acadia
1
0
Fork 0
Code Issues 6 Pull requests Projects Releases Packages Wiki Activity Actions

Jump to user mode.

Browse source 
This instantly creates a page fault as we always map pages with ring 0
permissions.
This commit is contained in:
Drew Galbraith 2023-05-29 12:44:26 -07:00
parent aefb4f082b
commit 7184f527a0
7 changed files with 37 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

15
zion/scheduler/thread.cpp
View file

@ -1,12 +1,16 @@
#include "scheduler/thread.h"
#include "common/gdt.h"
#include "debug/debug.h"
#include "loader/elf_loader.h"
#include "memory/paging_util.h"
#include "scheduler/process.h"
#include "scheduler/scheduler.h"
namespace {
extern "C" void jump_user_space(uint64_t rip, uint64_t rsp);
extern "C" void thread_init() {
asm("sti");
sched::CurrentThread().Init();
@ -36,9 +40,10 @@ Thread::Thread(Process* proc, uint64_t tid, uint64_t elf_ptr)
uint64_t Thread::pid() { return process_->id(); }
void Thread::Init() {
LoadElfProgram(elf_ptr_, 0);
while (true) {
dbgln("[%u.%u]", pid(), id_);
sched::Yield();
}
dbgln("[%u.%u]", pid(), id_);
uint64_t rip = LoadElfProgram(elf_ptr_, 0);
uint64_t rsp = 0x80000000;
EnsureResident(rsp - 1, 1);
SetRsp0(rsp0_start_);
jump_user_space(rip, rsp);
}