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-rw-r--r--arch/x86/machine/trap.c354
1 files changed, 0 insertions, 354 deletions
diff --git a/arch/x86/machine/trap.c b/arch/x86/machine/trap.c
deleted file mode 100644
index 90c8bf66..00000000
--- a/arch/x86/machine/trap.c
+++ /dev/null
@@ -1,354 +0,0 @@
-/*
- * Copyright (c) 2012-2014 Richard Braun.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- *
- * XXX Many traps have not been tested. Some, such as NMIs, are known to need
- * additional configuration and resources to be properly handled.
- */
-
-#include <assert.h>
-#include <stdalign.h>
-#include <stdint.h>
-#include <stdio.h>
-
-#include <kern/atomic.h>
-#include <kern/init.h>
-#include <kern/macros.h>
-#include <kern/spinlock.h>
-#include <kern/thread.h>
-#include <machine/cpu.h>
-#include <machine/lapic.h>
-#include <machine/pic.h>
-#include <machine/pmap.h>
-#include <machine/strace.h>
-#include <machine/trap.h>
-
-struct trap_cpu_data {
- alignas(CPU_DATA_ALIGN) unsigned char intr_stack[TRAP_STACK_SIZE];
-};
-
-static struct trap_cpu_data trap_cpu_data __percpu;
-
-/*
- * Type for interrupt service routines and trap handler functions.
- */
-typedef void (*trap_isr_fn_t)(void);
-
-/*
- * Trap handler flags.
- */
-#define TRAP_HF_INTR 0x1 /* Enter interrupt context */
-
-/*
- * Properties of a trap handler.
- */
-struct trap_handler {
- int flags;
- trap_handler_fn_t fn;
-};
-
-/*
- * Table of ISR addresses.
- */
-extern trap_isr_fn_t trap_isr_table[CPU_IDT_SIZE];
-
-/*
- * Array of trap handlers.
- */
-static struct trap_handler trap_handlers[CPU_IDT_SIZE] __read_mostly;
-
-/*
- * Global trap lock.
- *
- * This lock is currently only used to serialize concurrent trap handler
- * updates.
- *
- * Interrupts must be disabled when holding this lock.
- */
-static struct spinlock trap_lock;
-
-static struct trap_handler *
-trap_handler_get(unsigned int vector)
-{
- assert(vector < ARRAY_SIZE(trap_handlers));
- return &trap_handlers[vector];
-}
-
-static void __init
-trap_handler_init(struct trap_handler *handler, int flags, trap_handler_fn_t fn)
-{
- handler->flags = flags;
- handler->fn = fn;
-}
-
-static void __init
-trap_install(unsigned int vector, int flags, trap_handler_fn_t fn)
-{
- assert(vector < ARRAY_SIZE(trap_handlers));
- trap_handler_init(trap_handler_get(vector), flags, fn);
-}
-
-static void
-trap_show_thread(void)
-{
- struct thread *thread;
-
- thread = thread_self();
- printf("trap: interrupted thread: %p (%s)\n", thread, thread->name);
-}
-
-static void
-trap_double_fault(struct trap_frame *frame)
-{
- cpu_halt_broadcast();
-
-#ifndef __LP64__
- struct trap_frame frame_store;
- struct cpu *cpu;
-
- /*
- * Double faults are catched through a task gate, which makes the given
- * frame useless. The interrupted state is automatically saved in the
- * main TSS by the processor. Build a proper trap frame from there.
- */
- frame = &frame_store;
- cpu = cpu_current();
- frame->eax = cpu->tss.eax;
- frame->ebx = cpu->tss.ebx;
- frame->ecx = cpu->tss.ecx;
- frame->edx = cpu->tss.edx;
- frame->ebp = cpu->tss.ebp;
- frame->esi = cpu->tss.esi;
- frame->edi = cpu->tss.edi;
- frame->ds = cpu->tss.ds;
- frame->es = cpu->tss.es;
- frame->fs = cpu->tss.fs;
- frame->gs = cpu->tss.gs;
- frame->vector = TRAP_DF;
- frame->error = 0;
- frame->eip = cpu->tss.eip;
- frame->cs = cpu->tss.cs;
- frame->eflags = cpu->tss.eflags;
- frame->esp = cpu->tss.esp;
- frame->ss = cpu->tss.ss;
-#endif /* __LP64__ */
-
- printf("trap: double fault (cpu%u):\n", cpu_id());
- trap_show_thread();
- trap_frame_show(frame);
- trap_stack_show(frame);
- cpu_halt();
-}
-
-static void __init
-trap_install_double_fault(void)
-{
- trap_install(TRAP_DF, TRAP_HF_INTR, trap_double_fault);
- cpu_idt_set_double_fault(trap_isr_table[TRAP_DF]);
-}
-
-static void
-trap_default(struct trap_frame *frame)
-{
- cpu_halt_broadcast();
- printf("trap: unhandled interrupt or exception (cpu%u):\n", cpu_id());
- trap_show_thread();
- trap_frame_show(frame);
- trap_stack_show(frame);
- cpu_halt();
-}
-
-static int __init
-trap_setup(void)
-{
- size_t i;
-
- spinlock_init(&trap_lock);
-
- for (i = 0; i < ARRAY_SIZE(trap_isr_table); i++) {
- cpu_idt_set_gate(i, trap_isr_table[i]);
- }
-
- for (i = 0; i < ARRAY_SIZE(trap_handlers); i++) {
- trap_install(i, TRAP_HF_INTR, trap_default);
- }
-
- /* Architecture defined traps */
- trap_install(TRAP_DE, 0, trap_default);
- trap_install(TRAP_DB, 0, trap_default);
- trap_install(TRAP_NMI, TRAP_HF_INTR, trap_default);
- trap_install(TRAP_BP, 0, trap_default);
- trap_install(TRAP_OF, 0, trap_default);
- trap_install(TRAP_BR, 0, trap_default);
- trap_install(TRAP_UD, 0, trap_default);
- trap_install(TRAP_NM, 0, trap_default);
- trap_install_double_fault();
- trap_install(TRAP_TS, 0, trap_default);
- trap_install(TRAP_NP, 0, trap_default);
- trap_install(TRAP_SS, 0, trap_default);
- trap_install(TRAP_GP, 0, trap_default);
- trap_install(TRAP_PF, 0, trap_default);
- trap_install(TRAP_MF, 0, trap_default);
- trap_install(TRAP_AC, 0, trap_default);
- trap_install(TRAP_MC, TRAP_HF_INTR, trap_default);
- trap_install(TRAP_XM, 0, trap_default);
-
- /* System defined traps */
- trap_install(TRAP_XCALL, TRAP_HF_INTR, cpu_xcall_intr);
- trap_install(TRAP_THREAD_SCHEDULE, TRAP_HF_INTR, cpu_thread_schedule_intr);
- trap_install(TRAP_CPU_HALT, TRAP_HF_INTR, cpu_halt_intr);
-#ifdef CONFIG_PERFMON
- trap_install(TRAP_LAPIC_PMC_OF, TRAP_HF_INTR, lapic_pmc_overflow_intr);
-#endif
- trap_install(TRAP_LAPIC_TIMER, TRAP_HF_INTR, lapic_timer_intr);
- trap_install(TRAP_LAPIC_ERROR, TRAP_HF_INTR, lapic_error_intr);
- trap_install(TRAP_LAPIC_SPURIOUS, TRAP_HF_INTR, lapic_spurious_intr);
-
- return 0;
-}
-
-INIT_OP_DEFINE(trap_setup);
-
-void
-trap_main(struct trap_frame *frame)
-{
- struct trap_handler *handler;
- trap_handler_fn_t fn;
-
- assert(!cpu_intr_enabled());
-
- handler = trap_handler_get(frame->vector);
-
- if (handler->flags & TRAP_HF_INTR) {
- thread_intr_enter();
- }
-
- fn = atomic_load(&handler->fn, ATOMIC_RELAXED);
- fn(frame);
-
- if (handler->flags & TRAP_HF_INTR) {
- thread_intr_leave();
- }
-
- assert(!cpu_intr_enabled());
-}
-
-void
-trap_register(unsigned int vector, trap_handler_fn_t handler_fn)
-{
- unsigned long flags;
-
- spinlock_lock_intr_save(&trap_lock, &flags);
- trap_install(vector, TRAP_HF_INTR, handler_fn);
- spinlock_unlock_intr_restore(&trap_lock, flags);
-}
-
-#ifdef __LP64__
-
-void
-trap_frame_show(struct trap_frame *frame)
-{
- printf("trap: rax: %016lx rbx: %016lx rcx: %016lx\n"
- "trap: rdx: %016lx rbp: %016lx rsi: %016lx\n"
- "trap: rdi: %016lx r8: %016lx r9: %016lx\n"
- "trap: r10: %016lx r11: %016lx r12: %016lx\n"
- "trap: r13: %016lx r14: %016lx r15: %016lx\n"
- "trap: vector: %lu error: %08lx\n"
- "trap: rip: %016lx cs: %lu rflags: %016lx\n"
- "trap: rsp: %016lx ss: %lu\n",
- (unsigned long)frame->rax, (unsigned long)frame->rbx,
- (unsigned long)frame->rcx, (unsigned long)frame->rdx,
- (unsigned long)frame->rbp, (unsigned long)frame->rsi,
- (unsigned long)frame->rdi, (unsigned long)frame->r8,
- (unsigned long)frame->r9, (unsigned long)frame->r10,
- (unsigned long)frame->r11, (unsigned long)frame->r12,
- (unsigned long)frame->r13, (unsigned long)frame->r14,
- (unsigned long)frame->r15, (unsigned long)frame->vector,
- (unsigned long)frame->error, (unsigned long)frame->rip,
- (unsigned long)frame->cs, (unsigned long)frame->rflags,
- (unsigned long)frame->rsp, (unsigned long)frame->ss);
-
- /* XXX Until the page fault handler is written */
- if (frame->vector == 14) {
- printf("trap: cr2: %016lx\n", (unsigned long)cpu_get_cr2());
- }
-}
-
-#else /* __LP64__ */
-
-void
-trap_frame_show(struct trap_frame *frame)
-{
- unsigned long esp, ss;
-
- if ((frame->cs & CPU_PL_USER) || (frame->vector == TRAP_DF)) {
- esp = frame->esp;
- ss = frame->ss;
- } else {
- esp = 0;
- ss = 0;
- }
-
- printf("trap: eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n"
- "trap: ebp: %08lx esi: %08lx edi: %08lx\n"
- "trap: ds: %hu es: %hu fs: %hu gs: %hu\n"
- "trap: vector: %lu error: %08lx\n"
- "trap: eip: %08lx cs: %lu eflags: %08lx\n"
- "trap: esp: %08lx ss: %lu\n",
- (unsigned long)frame->eax, (unsigned long)frame->ebx,
- (unsigned long)frame->ecx, (unsigned long)frame->edx,
- (unsigned long)frame->ebp, (unsigned long)frame->esi,
- (unsigned long)frame->edi, (unsigned short)frame->ds,
- (unsigned short)frame->es, (unsigned short)frame->fs,
- (unsigned short)frame->gs, (unsigned long)frame->vector,
- (unsigned long)frame->error, (unsigned long)frame->eip,
- (unsigned long)frame->cs, (unsigned long)frame->eflags,
- (unsigned long)esp, (unsigned long)ss);
-
-
- /* XXX Until the page fault handler is written */
- if (frame->vector == 14) {
- printf("trap: cr2: %08lx\n", (unsigned long)cpu_get_cr2());
- }
-}
-
-#endif /* __LP64__ */
-
-void
-trap_stack_show(struct trap_frame *frame)
-{
-#ifdef __LP64__
- strace_show(frame->rip, frame->rbp);
-#else /* __LP64__ */
- strace_show(frame->eip, frame->ebp);
-#endif /* __LP64__ */
-}
-
-void *
-trap_get_interrupt_stack(const struct trap_frame *frame)
-{
- struct trap_cpu_data *cpu_data;
- struct trap_handler *handler;
-
- handler = trap_handler_get(frame->vector);
-
- if ((handler->flags & TRAP_HF_INTR) && !thread_interrupted()) {
- cpu_data = cpu_local_ptr(trap_cpu_data);
- return cpu_data->intr_stack + sizeof(cpu_data->intr_stack);
- } else {
- return NULL;
- }
-}
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