diff options
Diffstat (limited to 'boot/fake_syscall_entry.S')
| -rw-r--r-- | boot/fake_syscall_entry.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/boot/fake_syscall_entry.S b/boot/fake_syscall_entry.S new file mode 100644 index 0000000..ff2428d --- /dev/null +++ b/boot/fake_syscall_entry.S @@ -0,0 +1,25 @@ +.section .text + +.extern fake_syscall_handler + +.global fake_syscall_entry +fake_syscall_entry: + hlt + +.global fake_syscall_return +fake_syscall_return: + cli + mov %rdi, %rsp + lgdt (%rsp) + add $16, %rsp + + movw (%rsp), %ds + movw (%rsp), %es + movw (%rsp), %fs + movw (%rsp), %gs + movw (%rsp), %ss + + add $8, %rsp + + lretq + |