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x86: initial changes to unify traps_32.c and traps_64.c
This patch does not change the generated object files. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alexander van Heukelum
Ingo Molnar
parent
e93ef949fd
commit
a8c1be9d2e
@ -1,5 +1,6 @@
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/*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
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*
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* Pentium III FXSR, SSE support
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* Gareth Hughes <gareth@valinux.com>, May 2000
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@ -130,7 +131,8 @@ void printk_address(unsigned long address, int reliable)
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#endif
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}
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static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
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static inline int valid_stack_ptr(struct thread_info *tinfo,
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void *p, unsigned int size)
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{
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return p > (void *)tinfo &&
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p <= (void *)tinfo + THREAD_SIZE - size;
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@ -138,14 +140,14 @@ static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned s
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/* The form of the top of the frame on the stack */
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struct stack_frame {
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struct stack_frame *next_frame;
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unsigned long return_address;
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struct stack_frame *next_frame;
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unsigned long return_address;
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};
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static inline unsigned long
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print_context_stack(struct thread_info *tinfo,
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data)
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data)
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{
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struct stack_frame *frame = (struct stack_frame *)bp;
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@ -167,8 +169,6 @@ print_context_stack(struct thread_info *tinfo,
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return bp;
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}
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#define MSG(msg) ops->warning(data, msg)
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void dump_trace(struct task_struct *task, struct pt_regs *regs,
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data)
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@ -178,7 +178,6 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
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if (!stack) {
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unsigned long dummy;
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stack = &dummy;
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if (task != current)
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stack = (unsigned long *)task->thread.sp;
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@ -196,7 +195,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
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}
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#endif
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while (1) {
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for (;;) {
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struct thread_info *context;
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context = (struct thread_info *)
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@ -248,10 +247,10 @@ static void print_trace_address(void *data, unsigned long addr, int reliable)
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}
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static const struct stacktrace_ops print_trace_ops = {
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.warning = print_trace_warning,
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.warning_symbol = print_trace_warning_symbol,
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.stack = print_trace_stack,
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.address = print_trace_address,
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.warning = print_trace_warning,
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.warning_symbol = print_trace_warning_symbol,
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.stack = print_trace_stack,
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.address = print_trace_address,
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};
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static void
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@ -351,15 +350,14 @@ void show_registers(struct pt_regs *regs)
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printk(KERN_EMERG "Code: ");
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ip = (u8 *)regs->ip - code_prologue;
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if (ip < (u8 *)PAGE_OFFSET ||
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probe_kernel_address(ip, c)) {
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if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
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/* try starting at EIP */
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ip = (u8 *)regs->ip;
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code_len = code_len - code_prologue + 1;
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}
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for (i = 0; i < code_len; i++, ip++) {
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if (ip < (u8 *)PAGE_OFFSET ||
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probe_kernel_address(ip, c)) {
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probe_kernel_address(ip, c)) {
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printk(" Bad EIP value.");
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break;
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}
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@ -546,7 +544,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
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{ \
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trace_hardirqs_fixup(); \
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if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
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== NOTIFY_STOP) \
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== NOTIFY_STOP) \
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return; \
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do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
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}
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@ -562,7 +560,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
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info.si_code = sicode; \
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info.si_addr = (void __user *)siaddr; \
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if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
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== NOTIFY_STOP) \
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== NOTIFY_STOP) \
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return; \
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do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
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}
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@ -571,7 +569,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
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void do_##name(struct pt_regs *regs, long error_code) \
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{ \
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if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
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== NOTIFY_STOP) \
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== NOTIFY_STOP) \
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return; \
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do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
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}
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@ -586,22 +584,22 @@ void do_##name(struct pt_regs *regs, long error_code) \
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info.si_addr = (void __user *)siaddr; \
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trace_hardirqs_fixup(); \
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if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
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== NOTIFY_STOP) \
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== NOTIFY_STOP) \
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return; \
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do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
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}
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DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
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DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
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#ifndef CONFIG_KPROBES
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DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
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#endif
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DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
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DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
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DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
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DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
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DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
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DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
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DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
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DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
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DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
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DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
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DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
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DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
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DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
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@ -799,7 +797,7 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
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if (!(reason & 0xc0)) {
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if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
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== NOTIFY_STOP)
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== NOTIFY_STOP)
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return;
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#ifdef CONFIG_X86_LOCAL_APIC
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/*
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@ -818,6 +816,8 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
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}
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if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
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return;
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/* AK: following checks seem to be broken on modern chipsets. FIXME */
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if (reason & 0x80)
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mem_parity_error(reason, regs);
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if (reason & 0x40)
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@ -915,7 +915,7 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
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tsk->thread.debugctlmsr = 0;
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if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
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SIGTRAP) == NOTIFY_STOP)
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SIGTRAP) == NOTIFY_STOP)
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return;
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/* It's safe to allow irq's after DR6 has been saved */
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if (regs->flags & X86_EFLAGS_IF)
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@ -997,7 +997,7 @@ void math_error(void __user *ip)
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* C1 reg you need in case of a stack fault, 0x040 is the stack
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* fault bit. We should only be taking one exception at a time,
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* so if this combination doesn't produce any single exception,
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* then we have a bad program that isn't syncronizing its FPU usage
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* then we have a bad program that isn't synchronizing its FPU usage
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* and it will suffer the consequences since we won't be able to
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* fully reproduce the context of the exception
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*/
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@ -1006,7 +1006,7 @@ void math_error(void __user *ip)
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switch (swd & ~cwd & 0x3f) {
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case 0x000: /* No unmasked exception */
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return;
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default: /* Multiple exceptions */
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default: /* Multiple exceptions */
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break;
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case 0x001: /* Invalid Op */
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/*
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@ -1198,16 +1198,16 @@ void __init trap_init(void)
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early_iounmap(p, 4);
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#endif
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set_trap_gate(0, ÷_error);
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set_intr_gate(1, &debug);
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set_intr_gate(2, &nmi);
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set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
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set_system_gate(4, &overflow);
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set_trap_gate(5, &bounds);
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set_trap_gate(6, &invalid_op);
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set_trap_gate(7, &device_not_available);
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set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
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set_trap_gate(9, &coprocessor_segment_overrun);
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set_trap_gate(0, ÷_error);
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set_intr_gate(1, &debug);
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set_intr_gate(2, &nmi);
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set_system_intr_gate(3, &int3); /* int3 can be called from all */
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set_system_gate(4, &overflow); /* int4 can be called from all */
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set_trap_gate(5, &bounds);
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set_trap_gate(6, &invalid_op);
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set_trap_gate(7, &device_not_available);
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set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
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set_trap_gate(9, &coprocessor_segment_overrun);
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set_trap_gate(10, &invalid_TSS);
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set_trap_gate(11, &segment_not_present);
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set_trap_gate(12, &stack_segment);
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@ -205,8 +205,6 @@ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
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return NULL;
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}
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#define MSG(txt) ops->warning(data, txt)
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/*
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* x86-64 can have up to three kernel stacks:
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* process stack
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@ -233,11 +231,11 @@ struct stack_frame {
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unsigned long return_address;
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};
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static inline unsigned long print_context_stack(struct thread_info *tinfo,
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data,
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unsigned long *end)
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static inline unsigned long
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print_context_stack(struct thread_info *tinfo,
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data,
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unsigned long *end)
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{
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struct stack_frame *frame = (struct stack_frame *)bp;
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@ -259,7 +257,7 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo,
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return bp;
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}
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void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
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void dump_trace(struct task_struct *task, struct pt_regs *regs,
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unsigned long *stack, unsigned long bp,
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const struct stacktrace_ops *ops, void *data)
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{
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@ -268,31 +266,29 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
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unsigned used = 0;
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struct thread_info *tinfo;
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if (!tsk)
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tsk = current;
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tinfo = task_thread_info(tsk);
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if (!task)
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task = current;
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tinfo = task_thread_info(task);
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if (!stack) {
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unsigned long dummy;
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stack = &dummy;
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if (tsk && tsk != current)
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stack = (unsigned long *)tsk->thread.sp;
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if (task && task != current)
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stack = (unsigned long *)task->thread.sp;
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}
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#ifdef CONFIG_FRAME_POINTER
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if (!bp) {
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if (tsk == current) {
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if (task == current) {
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/* Grab bp right from our regs */
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asm("movq %%rbp, %0" : "=r" (bp):);
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asm("movq %%rbp, %0" : "=r" (bp) :);
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} else {
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/* bp is the last reg pushed by switch_to */
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bp = *(unsigned long *) tsk->thread.sp;
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bp = *(unsigned long *) task->thread.sp;
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}
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}
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#endif
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/*
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* Print function call entries in all stacks, starting at the
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* current stack address. If the stacks consist of nested
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@ -382,18 +378,17 @@ static const struct stacktrace_ops print_trace_ops = {
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.address = print_trace_address,
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};
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void
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show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack,
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unsigned long bp)
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void show_trace(struct task_struct *task, struct pt_regs *regs,
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unsigned long *stack, unsigned long bp)
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{
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printk("\nCall Trace:\n");
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dump_trace(tsk, regs, stack, bp, &print_trace_ops, NULL);
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dump_trace(task, regs, stack, bp, &print_trace_ops, NULL);
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printk("\n");
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}
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static void
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_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp,
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unsigned long bp)
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_show_stack(struct task_struct *task, struct pt_regs *regs,
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unsigned long *sp, unsigned long bp)
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{
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unsigned long *stack;
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int i;
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@ -405,14 +400,14 @@ _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp,
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// back trace for this cpu.
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if (sp == NULL) {
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if (tsk)
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sp = (unsigned long *)tsk->thread.sp;
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if (task)
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sp = (unsigned long *)task->thread.sp;
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else
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sp = (unsigned long *)&sp;
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}
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stack = sp;
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for(i=0; i < kstack_depth_to_print; i++) {
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for (i = 0; i < kstack_depth_to_print; i++) {
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if (stack >= irqstack && stack <= irqstack_end) {
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if (stack == irqstack_end) {
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stack = (unsigned long *) (irqstack_end[-1]);
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@ -427,12 +422,12 @@ _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp,
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printk(" %016lx", *stack++);
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touch_nmi_watchdog();
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}
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show_trace(tsk, regs, sp, bp);
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show_trace(task, regs, sp, bp);
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}
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void show_stack(struct task_struct *tsk, unsigned long * sp)
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void show_stack(struct task_struct *task, unsigned long *sp)
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{
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_show_stack(tsk, NULL, sp, 0);
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_show_stack(task, NULL, sp, 0);
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}
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/*
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@ -440,7 +435,7 @@ void show_stack(struct task_struct *tsk, unsigned long * sp)
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*/
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void dump_stack(void)
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{
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unsigned long dummy;
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unsigned long stack;
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unsigned long bp = 0;
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#ifdef CONFIG_FRAME_POINTER
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@ -453,7 +448,7 @@ void dump_stack(void)
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init_utsname()->release,
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(int)strcspn(init_utsname()->version, " "),
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init_utsname()->version);
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show_trace(NULL, NULL, &dummy, bp);
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show_trace(NULL, NULL, &stack, bp);
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}
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EXPORT_SYMBOL(dump_stack);
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@ -488,7 +483,7 @@ void show_registers(struct pt_regs *regs)
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printk(KERN_EMERG "Code: ");
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if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
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/* try starting at RIP */
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ip = (u8 *) regs->ip;
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ip = (u8 *)regs->ip;
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code_len = code_len - code_prologue + 1;
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}
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for (i = 0; i < code_len; i++, ip++) {
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@ -504,7 +499,7 @@ void show_registers(struct pt_regs *regs)
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}
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}
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printk("\n");
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}
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}
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int is_valid_bugaddr(unsigned long ip)
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{
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@ -576,8 +571,10 @@ int __kprobes __die(const char * str, struct pt_regs * regs, long err)
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printk("DEBUG_PAGEALLOC");
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#endif
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printk("\n");
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if (notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
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if (notify_die(DIE_OOPS, str, regs, err,
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current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
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return 1;
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show_registers(regs);
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add_taint(TAINT_DIE);
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/* Executive summary in case the oops scrolled away */
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@ -589,7 +586,7 @@ int __kprobes __die(const char * str, struct pt_regs * regs, long err)
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return 0;
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}
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void die(const char * str, struct pt_regs * regs, long err)
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void die(const char * str, struct pt_regs *regs, long err)
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{
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unsigned long flags = oops_begin();
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@ -606,8 +603,7 @@ die_nmi(char *str, struct pt_regs *regs, int do_panic)
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||||
{
|
||||
unsigned long flags;
|
||||
|
||||
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) ==
|
||||
NOTIFY_STOP)
|
||||
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
|
||||
return;
|
||||
|
||||
flags = oops_begin();
|
||||
@ -629,9 +625,9 @@ die_nmi(char *str, struct pt_regs *regs, int do_panic)
|
||||
do_exit(SIGBUS);
|
||||
}
|
||||
|
||||
static void __kprobes do_trap(int trapnr, int signr, char *str,
|
||||
struct pt_regs * regs, long error_code,
|
||||
siginfo_t *info)
|
||||
static void __kprobes
|
||||
do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
|
||||
long error_code, siginfo_t *info)
|
||||
{
|
||||
struct task_struct *tsk = current;
|
||||
|
||||
@ -676,38 +672,38 @@ static void __kprobes do_trap(int trapnr, int signr, char *str,
|
||||
}
|
||||
|
||||
#define DO_ERROR(trapnr, signr, str, name) \
|
||||
asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
|
||||
{ \
|
||||
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
|
||||
== NOTIFY_STOP) \
|
||||
return; \
|
||||
asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
|
||||
{ \
|
||||
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
|
||||
== NOTIFY_STOP) \
|
||||
return; \
|
||||
conditional_sti(regs); \
|
||||
do_trap(trapnr, signr, str, regs, error_code, NULL); \
|
||||
do_trap(trapnr, signr, str, regs, error_code, NULL); \
|
||||
}
|
||||
|
||||
#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
|
||||
asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
|
||||
{ \
|
||||
siginfo_t info; \
|
||||
info.si_signo = signr; \
|
||||
info.si_errno = 0; \
|
||||
info.si_code = sicode; \
|
||||
info.si_addr = (void __user *)siaddr; \
|
||||
trace_hardirqs_fixup(); \
|
||||
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
|
||||
== NOTIFY_STOP) \
|
||||
return; \
|
||||
#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
|
||||
asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
|
||||
{ \
|
||||
siginfo_t info; \
|
||||
info.si_signo = signr; \
|
||||
info.si_errno = 0; \
|
||||
info.si_code = sicode; \
|
||||
info.si_addr = (void __user *)siaddr; \
|
||||
trace_hardirqs_fixup(); \
|
||||
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
|
||||
== NOTIFY_STOP) \
|
||||
return; \
|
||||
conditional_sti(regs); \
|
||||
do_trap(trapnr, signr, str, regs, error_code, &info); \
|
||||
do_trap(trapnr, signr, str, regs, error_code, &info); \
|
||||
}
|
||||
|
||||
DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
|
||||
DO_ERROR( 4, SIGSEGV, "overflow", overflow)
|
||||
DO_ERROR( 5, SIGSEGV, "bounds", bounds)
|
||||
DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
|
||||
DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
|
||||
DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
|
||||
DO_ERROR(4, SIGSEGV, "overflow", overflow)
|
||||
DO_ERROR(5, SIGSEGV, "bounds", bounds)
|
||||
DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
|
||||
DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
|
||||
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
|
||||
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
|
||||
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
|
||||
DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
|
||||
|
||||
/* Runs on IST stack */
|
||||
@ -775,14 +771,14 @@ asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
|
||||
}
|
||||
|
||||
static notrace __kprobes void
|
||||
mem_parity_error(unsigned char reason, struct pt_regs * regs)
|
||||
mem_parity_error(unsigned char reason, struct pt_regs *regs)
|
||||
{
|
||||
printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
|
||||
reason);
|
||||
printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
|
||||
|
||||
#if defined(CONFIG_EDAC)
|
||||
if(edac_handler_set()) {
|
||||
if (edac_handler_set()) {
|
||||
edac_atomic_assert_error();
|
||||
return;
|
||||
}
|
||||
@ -799,7 +795,7 @@ mem_parity_error(unsigned char reason, struct pt_regs * regs)
|
||||
}
|
||||
|
||||
static notrace __kprobes void
|
||||
io_check_error(unsigned char reason, struct pt_regs * regs)
|
||||
io_check_error(unsigned char reason, struct pt_regs *regs)
|
||||
{
|
||||
printk("NMI: IOCK error (debug interrupt?)\n");
|
||||
show_registers(regs);
|
||||
@ -836,7 +832,7 @@ asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
|
||||
|
||||
cpu = smp_processor_id();
|
||||
|
||||
/* Only the BSP gets external NMIs from the system. */
|
||||
/* Only the BSP gets external NMIs from the system. */
|
||||
if (!cpu)
|
||||
reason = get_nmi_reason();
|
||||
|
||||
@ -848,18 +844,17 @@ asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
|
||||
* Ok, so this is none of the documented NMI sources,
|
||||
* so it must be the NMI watchdog.
|
||||
*/
|
||||
if (nmi_watchdog_tick(regs,reason))
|
||||
if (nmi_watchdog_tick(regs, reason))
|
||||
return;
|
||||
if (!do_nmi_callback(regs,cpu))
|
||||
if (!do_nmi_callback(regs, cpu))
|
||||
unknown_nmi_error(reason, regs);
|
||||
|
||||
return;
|
||||
}
|
||||
if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
|
||||
return;
|
||||
return;
|
||||
|
||||
/* AK: following checks seem to be broken on modern chipsets. FIXME */
|
||||
|
||||
if (reason & 0x80)
|
||||
mem_parity_error(reason, regs);
|
||||
if (reason & 0x40)
|
||||
@ -870,9 +865,12 @@ asmlinkage notrace __kprobes void
|
||||
do_nmi(struct pt_regs *regs, long error_code)
|
||||
{
|
||||
nmi_enter();
|
||||
|
||||
add_pda(__nmi_count, 1);
|
||||
|
||||
if (!ignore_nmis)
|
||||
default_do_nmi(regs);
|
||||
|
||||
nmi_exit();
|
||||
}
|
||||
|
||||
@ -889,13 +887,14 @@ void restart_nmi(void)
|
||||
}
|
||||
|
||||
/* runs on IST stack. */
|
||||
asmlinkage void __kprobes do_int3(struct pt_regs * regs, long error_code)
|
||||
asmlinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
|
||||
{
|
||||
trace_hardirqs_fixup();
|
||||
|
||||
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
|
||||
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
|
||||
== NOTIFY_STOP)
|
||||
return;
|
||||
}
|
||||
|
||||
preempt_conditional_sti(regs);
|
||||
do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
|
||||
preempt_conditional_cli(regs);
|
||||
@ -948,21 +947,19 @@ asmlinkage void __kprobes do_debug(struct pt_regs * regs,
|
||||
|
||||
/* Mask out spurious debug traps due to lazy DR7 setting */
|
||||
if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
|
||||
if (!tsk->thread.debugreg7) {
|
||||
if (!tsk->thread.debugreg7)
|
||||
goto clear_dr7;
|
||||
}
|
||||
}
|
||||
|
||||
tsk->thread.debugreg6 = condition;
|
||||
|
||||
|
||||
/*
|
||||
* Single-stepping through TF: make sure we ignore any events in
|
||||
* kernel space (but re-enable TF when returning to user mode).
|
||||
*/
|
||||
if (condition & DR_STEP) {
|
||||
if (!user_mode(regs))
|
||||
goto clear_TF_reenable;
|
||||
if (!user_mode(regs))
|
||||
goto clear_TF_reenable;
|
||||
}
|
||||
|
||||
/* Ok, finally something we can handle */
|
||||
@ -975,7 +972,7 @@ asmlinkage void __kprobes do_debug(struct pt_regs * regs,
|
||||
force_sig_info(SIGTRAP, &info, tsk);
|
||||
|
||||
clear_dr7:
|
||||
set_debugreg(0UL, 7);
|
||||
set_debugreg(0, 7);
|
||||
preempt_conditional_cli(regs);
|
||||
return;
|
||||
|
||||
@ -983,6 +980,7 @@ clear_TF_reenable:
|
||||
set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
|
||||
regs->flags &= ~X86_EFLAGS_TF;
|
||||
preempt_conditional_cli(regs);
|
||||
return;
|
||||
}
|
||||
|
||||
static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
|
||||
@ -1005,7 +1003,7 @@ static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
|
||||
asmlinkage void do_coprocessor_error(struct pt_regs *regs)
|
||||
{
|
||||
void __user *ip = (void __user *)(regs->ip);
|
||||
struct task_struct * task;
|
||||
struct task_struct *task;
|
||||
siginfo_t info;
|
||||
unsigned short cwd, swd;
|
||||
|
||||
@ -1038,30 +1036,30 @@ asmlinkage void do_coprocessor_error(struct pt_regs *regs)
|
||||
cwd = get_fpu_cwd(task);
|
||||
swd = get_fpu_swd(task);
|
||||
switch (swd & ~cwd & 0x3f) {
|
||||
case 0x000:
|
||||
default:
|
||||
break;
|
||||
case 0x001: /* Invalid Op */
|
||||
/*
|
||||
* swd & 0x240 == 0x040: Stack Underflow
|
||||
* swd & 0x240 == 0x240: Stack Overflow
|
||||
* User must clear the SF bit (0x40) if set
|
||||
*/
|
||||
info.si_code = FPE_FLTINV;
|
||||
break;
|
||||
case 0x002: /* Denormalize */
|
||||
case 0x010: /* Underflow */
|
||||
info.si_code = FPE_FLTUND;
|
||||
break;
|
||||
case 0x004: /* Zero Divide */
|
||||
info.si_code = FPE_FLTDIV;
|
||||
break;
|
||||
case 0x008: /* Overflow */
|
||||
info.si_code = FPE_FLTOVF;
|
||||
break;
|
||||
case 0x020: /* Precision */
|
||||
info.si_code = FPE_FLTRES;
|
||||
break;
|
||||
case 0x000: /* No unmasked exception */
|
||||
default: /* Multiple exceptions */
|
||||
break;
|
||||
case 0x001: /* Invalid Op */
|
||||
/*
|
||||
* swd & 0x240 == 0x040: Stack Underflow
|
||||
* swd & 0x240 == 0x240: Stack Overflow
|
||||
* User must clear the SF bit (0x40) if set
|
||||
*/
|
||||
info.si_code = FPE_FLTINV;
|
||||
break;
|
||||
case 0x002: /* Denormalize */
|
||||
case 0x010: /* Underflow */
|
||||
info.si_code = FPE_FLTUND;
|
||||
break;
|
||||
case 0x004: /* Zero Divide */
|
||||
info.si_code = FPE_FLTDIV;
|
||||
break;
|
||||
case 0x008: /* Overflow */
|
||||
info.si_code = FPE_FLTOVF;
|
||||
break;
|
||||
case 0x020: /* Precision */
|
||||
info.si_code = FPE_FLTRES;
|
||||
break;
|
||||
}
|
||||
force_sig_info(SIGFPE, &info, task);
|
||||
}
|
||||
@ -1074,7 +1072,7 @@ asmlinkage void bad_intr(void)
|
||||
asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
|
||||
{
|
||||
void __user *ip = (void __user *)(regs->ip);
|
||||
struct task_struct * task;
|
||||
struct task_struct *task;
|
||||
siginfo_t info;
|
||||
unsigned short mxcsr;
|
||||
|
||||
@ -1102,25 +1100,25 @@ asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
|
||||
*/
|
||||
mxcsr = get_fpu_mxcsr(task);
|
||||
switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
|
||||
case 0x000:
|
||||
default:
|
||||
break;
|
||||
case 0x001: /* Invalid Op */
|
||||
info.si_code = FPE_FLTINV;
|
||||
break;
|
||||
case 0x002: /* Denormalize */
|
||||
case 0x010: /* Underflow */
|
||||
info.si_code = FPE_FLTUND;
|
||||
break;
|
||||
case 0x004: /* Zero Divide */
|
||||
info.si_code = FPE_FLTDIV;
|
||||
break;
|
||||
case 0x008: /* Overflow */
|
||||
info.si_code = FPE_FLTOVF;
|
||||
break;
|
||||
case 0x020: /* Precision */
|
||||
info.si_code = FPE_FLTRES;
|
||||
break;
|
||||
case 0x000:
|
||||
default:
|
||||
break;
|
||||
case 0x001: /* Invalid Op */
|
||||
info.si_code = FPE_FLTINV;
|
||||
break;
|
||||
case 0x002: /* Denormalize */
|
||||
case 0x010: /* Underflow */
|
||||
info.si_code = FPE_FLTUND;
|
||||
break;
|
||||
case 0x004: /* Zero Divide */
|
||||
info.si_code = FPE_FLTDIV;
|
||||
break;
|
||||
case 0x008: /* Overflow */
|
||||
info.si_code = FPE_FLTOVF;
|
||||
break;
|
||||
case 0x020: /* Precision */
|
||||
info.si_code = FPE_FLTRES;
|
||||
break;
|
||||
}
|
||||
force_sig_info(SIGFPE, &info, task);
|
||||
}
|
||||
@ -1138,7 +1136,7 @@ asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
|
||||
}
|
||||
|
||||
/*
|
||||
* 'math_state_restore()' saves the current math information in the
|
||||
* 'math_state_restore()' saves the current math information in the
|
||||
* old math state array, and gets the new ones from the current task
|
||||
*
|
||||
* Careful.. There are problems with IBM-designed IRQ13 behaviour.
|
||||
@ -1163,7 +1161,7 @@ asmlinkage void math_state_restore(void)
|
||||
local_irq_disable();
|
||||
}
|
||||
|
||||
clts(); /* Allow maths ops (or we recurse) */
|
||||
clts(); /* Allow maths ops (or we recurse) */
|
||||
restore_fpu_checking(&me->thread.xstate->fxsave);
|
||||
task_thread_info(me)->status |= TS_USEDFPU;
|
||||
me->fpu_counter++;
|
||||
@ -1172,64 +1170,61 @@ EXPORT_SYMBOL_GPL(math_state_restore);
|
||||
|
||||
void __init trap_init(void)
|
||||
{
|
||||
set_intr_gate(0,÷_error);
|
||||
set_intr_gate_ist(1,&debug,DEBUG_STACK);
|
||||
set_intr_gate_ist(2,&nmi,NMI_STACK);
|
||||
set_system_gate_ist(3,&int3,DEBUG_STACK); /* int3 can be called from all */
|
||||
set_system_gate(4,&overflow); /* int4 can be called from all */
|
||||
set_intr_gate(5,&bounds);
|
||||
set_intr_gate(6,&invalid_op);
|
||||
set_intr_gate(7,&device_not_available);
|
||||
set_intr_gate_ist(8,&double_fault, DOUBLEFAULT_STACK);
|
||||
set_intr_gate(9,&coprocessor_segment_overrun);
|
||||
set_intr_gate(10,&invalid_TSS);
|
||||
set_intr_gate(11,&segment_not_present);
|
||||
set_intr_gate_ist(12,&stack_segment,STACKFAULT_STACK);
|
||||
set_intr_gate(13,&general_protection);
|
||||
set_intr_gate(14,&page_fault);
|
||||
set_intr_gate(15,&spurious_interrupt_bug);
|
||||
set_intr_gate(16,&coprocessor_error);
|
||||
set_intr_gate(17,&alignment_check);
|
||||
set_intr_gate(0, ÷_error);
|
||||
set_intr_gate_ist(1, &debug, DEBUG_STACK);
|
||||
set_intr_gate_ist(2, &nmi, NMI_STACK);
|
||||
set_system_gate_ist(3, &int3, DEBUG_STACK); /* int3 can be called from all */
|
||||
set_system_gate(4, &overflow); /* int4 can be called from all */
|
||||
set_intr_gate(5, &bounds);
|
||||
set_intr_gate(6, &invalid_op);
|
||||
set_intr_gate(7, &device_not_available);
|
||||
set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
|
||||
set_intr_gate(9, &coprocessor_segment_overrun);
|
||||
set_intr_gate(10, &invalid_TSS);
|
||||
set_intr_gate(11, &segment_not_present);
|
||||
set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
|
||||
set_intr_gate(13, &general_protection);
|
||||
set_intr_gate(14, &page_fault);
|
||||
set_intr_gate(15, &spurious_interrupt_bug);
|
||||
set_intr_gate(16, &coprocessor_error);
|
||||
set_intr_gate(17, &alignment_check);
|
||||
#ifdef CONFIG_X86_MCE
|
||||
set_intr_gate_ist(18,&machine_check, MCE_STACK);
|
||||
set_intr_gate_ist(18, &machine_check, MCE_STACK);
|
||||
#endif
|
||||
set_intr_gate(19,&simd_coprocessor_error);
|
||||
set_intr_gate(19, &simd_coprocessor_error);
|
||||
|
||||
#ifdef CONFIG_IA32_EMULATION
|
||||
set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* initialize the per thread extended state:
|
||||
*/
|
||||
init_thread_xstate();
|
||||
/*
|
||||
* Should be a barrier for any external CPU state.
|
||||
* Should be a barrier for any external CPU state:
|
||||
*/
|
||||
cpu_init();
|
||||
}
|
||||
|
||||
|
||||
static int __init oops_setup(char *s)
|
||||
{
|
||||
{
|
||||
if (!s)
|
||||
return -EINVAL;
|
||||
if (!strcmp(s, "panic"))
|
||||
panic_on_oops = 1;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
early_param("oops", oops_setup);
|
||||
|
||||
static int __init kstack_setup(char *s)
|
||||
{
|
||||
if (!s)
|
||||
return -EINVAL;
|
||||
kstack_depth_to_print = simple_strtoul(s,NULL,0);
|
||||
kstack_depth_to_print = simple_strtoul(s, NULL, 0);
|
||||
return 0;
|
||||
}
|
||||
early_param("kstack", kstack_setup);
|
||||
|
||||
|
||||
static int __init code_bytes_setup(char *s)
|
||||
{
|
||||
code_bytes = simple_strtoul(s, NULL, 0);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user