diff options
Diffstat (limited to 'arch/x86_64/umode_enter.c')
-rw-r--r-- | arch/x86_64/umode_enter.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86_64/umode_enter.c b/arch/x86_64/umode_enter.c new file mode 100644 index 0000000..3c7fa18 --- /dev/null +++ b/arch/x86_64/umode_enter.c @@ -0,0 +1,17 @@ +#include "tasking.h" + +__attribute__((noreturn)) +void +umode_enter(void *ip, void *sp) +{ + __asm__ volatile("mov %0, %%rsp; \ + push %%rcx; \ + mov %1, %%rcx; \ + mov $0x202, %%r11; \ + cli; \ + swapgs; \ + sysretq":: + "r"(sp), "r"(ip): + "memory"); + for(;;); +} |