xen-vtx-unstable

annotate xen/arch/x86/x86_64/traps.c @ 5824:48aed1403fe3

Port kallsyms to Xen, as 'symbols'.
Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Fri Jul 22 16:44:33 2005 +0000 (2005-07-22)
parents 8651a99cdc09
children dc7c14e533c2
rev   line source
kaf24@3602 1
kaf24@3602 2 #include <xen/config.h>
kaf24@3602 3 #include <xen/init.h>
kaf24@3602 4 #include <xen/sched.h>
kaf24@3602 5 #include <xen/lib.h>
kaf24@3602 6 #include <xen/errno.h>
kaf24@3602 7 #include <xen/mm.h>
kaf24@3602 8 #include <xen/irq.h>
kaf24@5824 9 #include <xen/symbols.h>
kaf24@3630 10 #include <xen/console.h>
kaf24@3650 11 #include <xen/sched.h>
cl349@5291 12 #include <asm/current.h>
kaf24@5159 13 #include <asm/flushtlb.h>
kaf24@3650 14 #include <asm/msr.h>
kaf24@3602 15
kaf24@4683 16 void show_registers(struct cpu_user_regs *regs)
kaf24@3602 17 {
kaf24@5824 18 printk("CPU: %d\nEIP: %04x:[<%016lx>]",
kaf24@5824 19 smp_processor_id(), 0xffff & regs->cs, regs->rip);
kaf24@5824 20 print_symbol(" %s\n", regs->rip);
kaf24@5824 21 printk("EFLAGS: %016lx\n", regs->eflags);
kaf24@4654 22 printk("rax: %016lx rbx: %016lx rcx: %016lx rdx: %016lx\n",
kaf24@3602 23 regs->rax, regs->rbx, regs->rcx, regs->rdx);
kaf24@4654 24 printk("rsi: %016lx rdi: %016lx rbp: %016lx rsp: %016lx\n",
kaf24@3621 25 regs->rsi, regs->rdi, regs->rbp, regs->rsp);
kaf24@4654 26 printk("r8: %016lx r9: %016lx r10: %016lx r11: %016lx\n",
kaf24@3602 27 regs->r8, regs->r9, regs->r10, regs->r11);
kaf24@4654 28 printk("r12: %016lx r13: %016lx r14: %016lx r15: %016lx\n",
kaf24@3602 29 regs->r12, regs->r13, regs->r14, regs->r15);
kaf24@3602 30
kaf24@4923 31 if ( GUEST_MODE(regs) )
kaf24@4923 32 show_guest_stack();
kaf24@5073 33 else
kaf24@5073 34 show_stack((unsigned long *)regs->rsp);
kaf24@5073 35 }
kaf24@3602 36
kaf24@3630 37 void show_page_walk(unsigned long addr)
kaf24@3630 38 {
kaf24@3630 39 unsigned long page = read_cr3();
kaf24@3630 40
kaf24@4654 41 printk("Pagetable walk from %016lx:\n", addr);
kaf24@3630 42
kaf24@3630 43 page &= PAGE_MASK;
kaf24@3630 44 page = ((unsigned long *) __va(page))[l4_table_offset(addr)];
kaf24@4654 45 printk(" L4 = %016lx\n", page);
kaf24@3630 46 if ( !(page & _PAGE_PRESENT) )
kaf24@3630 47 return;
kaf24@3630 48
kaf24@3630 49 page &= PAGE_MASK;
kaf24@3630 50 page = ((unsigned long *) __va(page))[l3_table_offset(addr)];
kaf24@4654 51 printk(" L3 = %016lx\n", page);
kaf24@3630 52 if ( !(page & _PAGE_PRESENT) )
kaf24@3630 53 return;
kaf24@3630 54
kaf24@3630 55 page &= PAGE_MASK;
kaf24@3630 56 page = ((unsigned long *) __va(page))[l2_table_offset(addr)];
kaf24@4654 57 printk(" L2 = %016lx %s\n", page, (page & _PAGE_PSE) ? "(2MB)" : "");
kaf24@3630 58 if ( !(page & _PAGE_PRESENT) || (page & _PAGE_PSE) )
kaf24@3630 59 return;
kaf24@3630 60
kaf24@3630 61 page &= PAGE_MASK;
kaf24@3630 62 page = ((unsigned long *) __va(page))[l1_table_offset(addr)];
kaf24@4654 63 printk(" L1 = %016lx\n", page);
kaf24@3630 64 }
kaf24@3630 65
kaf24@3630 66 asmlinkage void double_fault(void);
kaf24@4683 67 asmlinkage void do_double_fault(struct cpu_user_regs *regs)
kaf24@3630 68 {
kaf24@4926 69 watchdog_disable();
kaf24@3630 70
kaf24@3686 71 console_force_unlock();
kaf24@3686 72
kaf24@3630 73 /* Find information saved during fault and dump it to the console. */
kaf24@3630 74 printk("************************************\n");
kaf24@3695 75 show_registers(regs);
kaf24@3630 76 printk("************************************\n");
kaf24@3695 77 printk("CPU%d DOUBLE FAULT -- system shutdown\n", smp_processor_id());
kaf24@3630 78 printk("System needs manual reset.\n");
kaf24@3630 79 printk("************************************\n");
kaf24@3630 80
kaf24@3630 81 /* Lock up the console to prevent spurious output from other CPUs. */
kaf24@3630 82 console_force_lock();
kaf24@3630 83
kaf24@3630 84 /* Wait for manual reset. */
kaf24@3630 85 for ( ; ; )
kaf24@3630 86 __asm__ __volatile__ ( "hlt" );
kaf24@3630 87 }
kaf24@3630 88
kaf24@3761 89 asmlinkage void syscall_enter(void);
kaf24@3650 90 void __init percpu_traps_init(void)
kaf24@3650 91 {
kaf24@3761 92 char *stack_bottom, *stack;
kaf24@3761 93 int cpu = smp_processor_id();
kaf24@3761 94
kaf24@3774 95 if ( cpu == 0 )
kaf24@3774 96 {
kaf24@3774 97 /* Specify dedicated interrupt stacks for NMIs and double faults. */
kaf24@3774 98 set_intr_gate(TRAP_double_fault, &double_fault);
kaf24@3774 99 idt_table[TRAP_double_fault].a |= 1UL << 32; /* IST1 */
kaf24@3774 100 idt_table[TRAP_nmi].a |= 2UL << 32; /* IST2 */
kaf24@3774 101 }
kaf24@3774 102
kaf24@3761 103 stack_bottom = (char *)get_stack_bottom();
kaf24@3761 104 stack = (char *)((unsigned long)stack_bottom & ~(STACK_SIZE - 1));
kaf24@3695 105
kaf24@3695 106 /* Double-fault handler has its own per-CPU 1kB stack. */
kaf24@3695 107 init_tss[cpu].ist[0] = (unsigned long)&stack[1024];
kaf24@3695 108
kaf24@3695 109 /* NMI handler has its own per-CPU 1kB stack. */
kaf24@3695 110 init_tss[cpu].ist[1] = (unsigned long)&stack[2048];
kaf24@3695 111
kaf24@3695 112 /*
kaf24@3695 113 * Trampoline for SYSCALL entry from long mode.
kaf24@3695 114 */
kaf24@3695 115
kaf24@3695 116 /* Skip the NMI and DF stacks. */
kaf24@3695 117 stack = &stack[2048];
kaf24@3695 118 wrmsr(MSR_LSTAR, (unsigned long)stack, ((unsigned long)stack>>32));
kaf24@3650 119
kaf24@3650 120 /* movq %rsp, saversp(%rip) */
kaf24@3650 121 stack[0] = 0x48;
kaf24@3650 122 stack[1] = 0x89;
kaf24@3650 123 stack[2] = 0x25;
kaf24@3761 124 *(u32 *)&stack[3] = (stack_bottom - &stack[7]) - 16;
kaf24@3650 125
kaf24@3650 126 /* leaq saversp(%rip), %rsp */
kaf24@3650 127 stack[7] = 0x48;
kaf24@3650 128 stack[8] = 0x8d;
kaf24@3650 129 stack[9] = 0x25;
kaf24@3761 130 *(u32 *)&stack[10] = (stack_bottom - &stack[14]) - 16;
kaf24@3650 131
kaf24@3783 132 /* pushq %r11 */
kaf24@3783 133 stack[14] = 0x41;
kaf24@3783 134 stack[15] = 0x53;
kaf24@3783 135
kaf24@3783 136 /* pushq $__GUEST_CS64 */
kaf24@3783 137 stack[16] = 0x68;
kaf24@3783 138 *(u32 *)&stack[17] = __GUEST_CS64;
kaf24@3783 139
kaf24@3761 140 /* jmp syscall_enter */
kaf24@3783 141 stack[21] = 0xe9;
kaf24@3783 142 *(u32 *)&stack[22] = (char *)syscall_enter - &stack[26];
kaf24@3650 143
kaf24@3695 144 /*
kaf24@3695 145 * Trampoline for SYSCALL entry from compatibility mode.
kaf24@3695 146 */
kaf24@3695 147
kaf24@3695 148 /* Skip the long-mode entry trampoline. */
kaf24@3783 149 stack = &stack[26];
kaf24@3695 150 wrmsr(MSR_CSTAR, (unsigned long)stack, ((unsigned long)stack>>32));
kaf24@3695 151
kaf24@3695 152 /* movq %rsp, saversp(%rip) */
kaf24@3695 153 stack[0] = 0x48;
kaf24@3695 154 stack[1] = 0x89;
kaf24@3695 155 stack[2] = 0x25;
kaf24@3761 156 *(u32 *)&stack[3] = (stack_bottom - &stack[7]) - 16;
kaf24@3695 157
kaf24@3695 158 /* leaq saversp(%rip), %rsp */
kaf24@3695 159 stack[7] = 0x48;
kaf24@3695 160 stack[8] = 0x8d;
kaf24@3695 161 stack[9] = 0x25;
kaf24@3761 162 *(u32 *)&stack[10] = (stack_bottom - &stack[14]) - 16;
kaf24@3695 163
kaf24@3783 164 /* pushq %r11 */
kaf24@3783 165 stack[14] = 0x41;
kaf24@3783 166 stack[15] = 0x53;
kaf24@3783 167
kaf24@3783 168 /* pushq $__GUEST_CS32 */
kaf24@3783 169 stack[16] = 0x68;
kaf24@3783 170 *(u32 *)&stack[17] = __GUEST_CS32;
kaf24@3783 171
kaf24@3761 172 /* jmp syscall_enter */
kaf24@3783 173 stack[21] = 0xe9;
kaf24@3783 174 *(u32 *)&stack[22] = (char *)syscall_enter - &stack[26];
kaf24@3695 175
kaf24@3695 176 /*
kaf24@3695 177 * Common SYSCALL parameters.
kaf24@3695 178 */
kaf24@3695 179
kaf24@3696 180 wrmsr(MSR_STAR, 0, (FLAT_RING3_CS32<<16) | __HYPERVISOR_CS);
kaf24@3822 181 wrmsr(MSR_SYSCALL_MASK, EF_VM|EF_RF|EF_NT|EF_DF|EF_IE|EF_TF, 0U);
kaf24@3650 182 }
kaf24@3650 183
kaf24@3780 184 long do_set_callbacks(unsigned long event_address,
kaf24@3780 185 unsigned long failsafe_address,
kaf24@3780 186 unsigned long syscall_address)
kaf24@3780 187 {
kaf24@5289 188 struct vcpu *d = current;
kaf24@3780 189
kaf24@4689 190 d->arch.guest_context.event_callback_eip = event_address;
kaf24@4689 191 d->arch.guest_context.failsafe_callback_eip = failsafe_address;
kaf24@4689 192 d->arch.guest_context.syscall_callback_eip = syscall_address;
kaf24@3780 193
kaf24@3780 194 return 0;
kaf24@3780 195 }