diff options
Diffstat (limited to 'drivers/lguest/x86/core.c')
| -rw-r--r-- | drivers/lguest/x86/core.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c index ae46c6b1f2f9..d96a93d95aea 100644 --- a/drivers/lguest/x86/core.c +++ b/drivers/lguest/x86/core.c @@ -127,7 +127,7 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages) /* Set the trap number to 256 (impossible value). If we fault while * switching to the Guest (bad segment registers or bug), this will * cause us to abort the Guest. */ - lg->regs->trapnum = 256; + cpu->regs->trapnum = 256; /* Now: we push the "eflags" register on the stack, then do an "lcall". * This is how we change from using the kernel code segment to using @@ -195,11 +195,11 @@ void lguest_arch_run_guest(struct lg_cpu *cpu) * bad virtual address. We have to grab this now, because once we * re-enable interrupts an interrupt could fault and thus overwrite * cr2, or we could even move off to a different CPU. */ - if (lg->regs->trapnum == 14) + if (cpu->regs->trapnum == 14) lg->arch.last_pagefault = read_cr2(); /* Similarly, if we took a trap because the Guest used the FPU, * we have to restore the FPU it expects to see. */ - else if (lg->regs->trapnum == 7) + else if (cpu->regs->trapnum == 7) math_state_restore(); /* Restore SYSENTER if it's supposed to be on. */ @@ -225,12 +225,12 @@ static int emulate_insn(struct lg_cpu *cpu) unsigned int insnlen = 0, in = 0, shift = 0; /* The eip contains the *virtual* address of the Guest's instruction: * guest_pa just subtracts the Guest's page_offset. */ - unsigned long physaddr = guest_pa(lg, lg->regs->eip); + unsigned long physaddr = guest_pa(lg, cpu->regs->eip); /* This must be the Guest kernel trying to do something, not userspace! * The bottom two bits of the CS segment register are the privilege * level. */ - if ((lg->regs->cs & 3) != GUEST_PL) + if ((cpu->regs->cs & 3) != GUEST_PL) return 0; /* Decoding x86 instructions is icky. */ @@ -273,12 +273,12 @@ static int emulate_insn(struct lg_cpu *cpu) if (in) { /* Lower bit tells is whether it's a 16 or 32 bit access */ if (insn & 0x1) - lg->regs->eax = 0xFFFFFFFF; + cpu->regs->eax = 0xFFFFFFFF; else - lg->regs->eax |= (0xFFFF << shift); + cpu->regs->eax |= (0xFFFF << shift); } /* Finally, we've "done" the instruction, so move past it. */ - lg->regs->eip += insnlen; + cpu->regs->eip += insnlen; /* Success! */ return 1; } @@ -287,12 +287,12 @@ static int emulate_insn(struct lg_cpu *cpu) void lguest_arch_handle_trap(struct lg_cpu *cpu) { struct lguest *lg = cpu->lg; - switch (lg->regs->trapnum) { + switch (cpu->regs->trapnum) { case 13: /* We've intercepted a General Protection Fault. */ /* Check if this was one of those annoying IN or OUT * instructions which we need to emulate. If so, we just go * back into the Guest after we've done it. */ - if (lg->regs->errcode == 0) { + if (cpu->regs->errcode == 0) { if (emulate_insn(cpu)) return; } @@ -307,7 +307,7 @@ void lguest_arch_handle_trap(struct lg_cpu *cpu) * * The errcode tells whether this was a read or a write, and * whether kernel or userspace code. */ - if (demand_page(lg, lg->arch.last_pagefault, lg->regs->errcode)) + if (demand_page(lg, lg->arch.last_pagefault, cpu->regs->errcode)) return; /* OK, it's really not there (or not OK): the Guest needs to @@ -338,19 +338,19 @@ void lguest_arch_handle_trap(struct lg_cpu *cpu) case LGUEST_TRAP_ENTRY: /* Our 'struct hcall_args' maps directly over our regs: we set * up the pointer now to indicate a hypercall is pending. */ - cpu->hcall = (struct hcall_args *)lg->regs; + cpu->hcall = (struct hcall_args *)cpu->regs; return; } /* We didn't handle the trap, so it needs to go to the Guest. */ - if (!deliver_trap(cpu, lg->regs->trapnum)) + if (!deliver_trap(cpu, cpu->regs->trapnum)) /* If the Guest doesn't have a handler (either it hasn't * registered any yet, or it's one of the faults we don't let * it handle), it dies with a cryptic error message. */ kill_guest(lg, "unhandled trap %li at %#lx (%#lx)", - lg->regs->trapnum, lg->regs->eip, - lg->regs->trapnum == 14 ? lg->arch.last_pagefault - : lg->regs->errcode); + cpu->regs->trapnum, cpu->regs->eip, + cpu->regs->trapnum == 14 ? lg->arch.last_pagefault + : cpu->regs->errcode); } /* Now we can look at each of the routines this calls, in increasing order of @@ -557,9 +557,9 @@ int lguest_arch_init_hypercalls(struct lg_cpu *cpu) * * Most of the Guest's registers are left alone: we used get_zeroed_page() to * allocate the structure, so they will be 0. */ -void lguest_arch_setup_regs(struct lguest *lg, unsigned long start) +void lguest_arch_setup_regs(struct lg_cpu *cpu, unsigned long start) { - struct lguest_regs *regs = lg->regs; + struct lguest_regs *regs = cpu->regs; /* There are four "segment" registers which the Guest needs to boot: * The "code segment" register (cs) refers to the kernel code segment @@ -586,5 +586,5 @@ void lguest_arch_setup_regs(struct lguest *lg, unsigned long start) /* There are a couple of GDT entries the Guest expects when first * booting. */ - setup_guest_gdt(lg); + setup_guest_gdt(cpu->lg); } |