diff options
Diffstat (limited to 'arch/x86_64/src/boot/boot.s')
| -rw-r--r-- | arch/x86_64/src/boot/boot.s | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/arch/x86_64/src/boot/boot.s b/arch/x86_64/src/boot/boot.s index 139fd1a..7932045 100644 --- a/arch/x86_64/src/boot/boot.s +++ b/arch/x86_64/src/boot/boot.s @@ -352,36 +352,6 @@ prepare_page_maps: .section .boot_text, "ax", @progbits .code64 -test_function: - cli - ret - -.global context_switch -context_switch: - // ring 3 data with bottom 2 bits set for ring 3 - mov $((4 * 16) | 3), %rax - mov %rax, %ds - mov %rax, %es - mov %rax, %fs - mov %rax, %gs - // SS is handled by iret https://wiki.osdev.org/Getting_to_Ring_3 - - // set up the stack frame iret expects - mov %rsp, %rax - // user data selector - push $((4 * 16) | 3) - // current rsp - push %rax - // push eflags - pushf - // push code selector (ring 3 code with bottom 2 bits set for ring 3) - push $((3 * 16) | 3) - // push instruction address to return to - lea [test_function], %rax - push %rax - - iretq - _transition_to_long_mode: xor %rax, %rax mov %rax, %ss |