diff options
Diffstat (limited to 'drivers/lguest/lguest_user.c')
| -rw-r--r-- | drivers/lguest/lguest_user.c | 37 |
1 files changed, 1 insertions, 36 deletions
diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c index d4ac5f8..b184652 100644 --- a/drivers/lguest/lguest_user.c +++ b/drivers/lguest/lguest_user.c @@ -9,37 +9,6 @@ #include <linux/fs.h> #include "lg.h" -/*L:030 setup_regs() doesn't really belong in this file, but it gives us an - * early glimpse deeper into the Host so it's worth having here. - * - * Most of the Guest's registers are left alone: we used get_zeroed_page() to - * allocate the structure, so they will be 0. */ -static void setup_regs(struct lguest_regs *regs, unsigned long start) -{ - /* There are four "segment" registers which the Guest needs to boot: - * The "code segment" register (cs) refers to the kernel code segment - * __KERNEL_CS, and the "data", "extra" and "stack" segment registers - * refer to the kernel data segment __KERNEL_DS. - * - * The privilege level is packed into the lower bits. The Guest runs - * at privilege level 1 (GUEST_PL).*/ - regs->ds = regs->es = regs->ss = __KERNEL_DS|GUEST_PL; - regs->cs = __KERNEL_CS|GUEST_PL; - - /* The "eflags" register contains miscellaneous flags. Bit 1 (0x002) - * is supposed to always be "1". Bit 9 (0x200) controls whether - * interrupts are enabled. We always leave interrupts enabled while - * running the Guest. */ - regs->eflags = 0x202; - - /* The "Extended Instruction Pointer" register says where the Guest is - * running. */ - regs->eip = start; - - /* %esi points to our boot information, at physical address 0, so don't - * touch it. */ -} - /*L:310 To send DMA into the Guest, the Launcher needs to be able to ask for a * DMA buffer. This is done by writing LHREQ_GETDMA and the key to * /dev/lguest. */ @@ -214,11 +183,7 @@ static int initialize(struct file *file, const unsigned long __user *input) /* Now we initialize the Guest's registers, handing it the start * address. */ - setup_regs(lg->regs, args[3]); - - /* There are a couple of GDT entries the Guest expects when first - * booting. */ - setup_guest_gdt(lg); + lguest_arch_setup_regs(lg, args[3]); /* The timer for lguest's clock needs initialization. */ init_clockdev(lg); |
