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Load a very simple ELF and launch it in usermode

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This commit is contained in:
Jeremy Soller 2016-09-07 21:16:30 -06:00
parent 398838dc1b
commit 850792bbf1
11 changed files with 201 additions and 59 deletions
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44
arch/x86_64/src/start.rs
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@ -137,28 +137,6 @@ pub unsafe extern fn kstart() -> ! {
kmain();
}
unsafe fn usermode(ip: usize, sp: usize) {
// Test usermode
asm!("xchg bx, bx
mov rax, 0x2B
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
push rax
push rbx
pushfq
mov rax, 0x23
push rax
push rcx
iretq"
:
: "{rbx}"(sp), "{rcx}"(ip)
: "rax", "rbx", "rcx", "sp"
: "intel", "volatile");
}
/// Entry to rust for an AP
pub unsafe extern fn kstart_ap(stack_start: usize, stack_end: usize) -> ! {
{
@ -223,3 +201,25 @@ pub unsafe extern fn kstart_ap(stack_start: usize, stack_end: usize) -> ! {
kmain_ap(ap_number);
}
pub unsafe fn usermode(ip: usize, sp: usize) {
// Test usermode
asm!("xchg bx, bx
mov rax, 0x2B
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
push rax
push rbx
pushfq
mov rax, 0x23
push rax
push rcx
iretq"
:
: "{rbx}"(sp), "{rcx}"(ip)
: "rax", "rbx", "rcx", "sp"
: "intel", "volatile");
}