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---
r: 100021
b: refs/heads/master
c: a8c1be9
h: refs/heads/master
i:
  100019: 23c2d24
v: v3
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Alexander van Heukelum authored and Ingo Molnar committed Jul 9, 2008
1 parent d255e85 commit 6a2aa46
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Showing 3 changed files with 192 additions and 197 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: e93ef949fd9a3f237aedfb8e64414b28980530b8
refs/heads/master: a8c1be9d2e78d8608892c86791837acf12da4bf6
78 changes: 39 additions & 39 deletions trunk/arch/x86/kernel/traps_32.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
/*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
*
* Pentium III FXSR, SSE support
* Gareth Hughes <gareth@valinux.com>, May 2000
Expand Down Expand Up @@ -130,22 +131,23 @@ void printk_address(unsigned long address, int reliable)
#endif
}

static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
static inline int valid_stack_ptr(struct thread_info *tinfo,
void *p, unsigned int size)
{
return p > (void *)tinfo &&
p <= (void *)tinfo + THREAD_SIZE - size;
}

/* The form of the top of the frame on the stack */
struct stack_frame {
struct stack_frame *next_frame;
unsigned long return_address;
struct stack_frame *next_frame;
unsigned long return_address;
};

static inline unsigned long
print_context_stack(struct thread_info *tinfo,
unsigned long *stack, unsigned long bp,
const struct stacktrace_ops *ops, void *data)
unsigned long *stack, unsigned long bp,
const struct stacktrace_ops *ops, void *data)
{
struct stack_frame *frame = (struct stack_frame *)bp;

Expand All @@ -167,8 +169,6 @@ print_context_stack(struct thread_info *tinfo,
return bp;
}

#define MSG(msg) ops->warning(data, msg)

void dump_trace(struct task_struct *task, struct pt_regs *regs,
unsigned long *stack, unsigned long bp,
const struct stacktrace_ops *ops, void *data)
Expand All @@ -178,7 +178,6 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,

if (!stack) {
unsigned long dummy;

stack = &dummy;
if (task != current)
stack = (unsigned long *)task->thread.sp;
Expand All @@ -196,7 +195,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
}
#endif

while (1) {
for (;;) {
struct thread_info *context;

context = (struct thread_info *)
Expand Down Expand Up @@ -248,10 +247,10 @@ static void print_trace_address(void *data, unsigned long addr, int reliable)
}

static const struct stacktrace_ops print_trace_ops = {
.warning = print_trace_warning,
.warning_symbol = print_trace_warning_symbol,
.stack = print_trace_stack,
.address = print_trace_address,
.warning = print_trace_warning,
.warning_symbol = print_trace_warning_symbol,
.stack = print_trace_stack,
.address = print_trace_address,
};

static void
Expand Down Expand Up @@ -351,15 +350,14 @@ void show_registers(struct pt_regs *regs)
printk(KERN_EMERG "Code: ");

ip = (u8 *)regs->ip - code_prologue;
if (ip < (u8 *)PAGE_OFFSET ||
probe_kernel_address(ip, c)) {
if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
/* try starting at EIP */
ip = (u8 *)regs->ip;
code_len = code_len - code_prologue + 1;
}
for (i = 0; i < code_len; i++, ip++) {
if (ip < (u8 *)PAGE_OFFSET ||
probe_kernel_address(ip, c)) {
probe_kernel_address(ip, c)) {
printk(" Bad EIP value.");
break;
}
Expand Down Expand Up @@ -546,7 +544,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
{ \
trace_hardirqs_fixup(); \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
== NOTIFY_STOP) \
return; \
do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
}
Expand All @@ -562,7 +560,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
info.si_code = sicode; \
info.si_addr = (void __user *)siaddr; \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
== NOTIFY_STOP) \
return; \
do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
}
Expand All @@ -571,7 +569,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
void do_##name(struct pt_regs *regs, long error_code) \
{ \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
== NOTIFY_STOP) \
return; \
do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
}
Expand All @@ -586,22 +584,22 @@ void do_##name(struct pt_regs *regs, long error_code) \
info.si_addr = (void __user *)siaddr; \
trace_hardirqs_fixup(); \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
== NOTIFY_STOP) \
return; \
do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
}

DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
#ifndef CONFIG_KPROBES
DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
#endif
DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
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(12, SIGBUS, "stack segment", stack_segment)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)

Expand Down Expand Up @@ -799,7 +797,7 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)

if (!(reason & 0xc0)) {
if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
== NOTIFY_STOP)
== NOTIFY_STOP)
return;
#ifdef CONFIG_X86_LOCAL_APIC
/*
Expand All @@ -818,6 +816,8 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
}
if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
return;

/* AK: following checks seem to be broken on modern chipsets. FIXME */
if (reason & 0x80)
mem_parity_error(reason, regs);
if (reason & 0x40)
Expand Down Expand Up @@ -915,7 +915,7 @@ void __kprobes do_debug(struct pt_regs *regs, long error_code)
tsk->thread.debugctlmsr = 0;

if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
SIGTRAP) == NOTIFY_STOP)
SIGTRAP) == NOTIFY_STOP)
return;
/* It's safe to allow irq's after DR6 has been saved */
if (regs->flags & X86_EFLAGS_IF)
Expand Down Expand Up @@ -997,7 +997,7 @@ void math_error(void __user *ip)
* C1 reg you need in case of a stack fault, 0x040 is the stack
* fault bit. We should only be taking one exception at a time,
* so if this combination doesn't produce any single exception,
* then we have a bad program that isn't syncronizing its FPU usage
* then we have a bad program that isn't synchronizing its FPU usage
* and it will suffer the consequences since we won't be able to
* fully reproduce the context of the exception
*/
Expand All @@ -1006,7 +1006,7 @@ void math_error(void __user *ip)
switch (swd & ~cwd & 0x3f) {
case 0x000: /* No unmasked exception */
return;
default: /* Multiple exceptions */
default: /* Multiple exceptions */
break;
case 0x001: /* Invalid Op */
/*
Expand Down Expand Up @@ -1198,16 +1198,16 @@ void __init trap_init(void)
early_iounmap(p, 4);
#endif

set_trap_gate(0, &divide_error);
set_intr_gate(1, &debug);
set_intr_gate(2, &nmi);
set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
set_system_gate(4, &overflow);
set_trap_gate(5, &bounds);
set_trap_gate(6, &invalid_op);
set_trap_gate(7, &device_not_available);
set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
set_trap_gate(9, &coprocessor_segment_overrun);
set_trap_gate(0, &divide_error);
set_intr_gate(1, &debug);
set_intr_gate(2, &nmi);
set_system_intr_gate(3, &int3); /* int3 can be called from all */
set_system_gate(4, &overflow); /* int4 can be called from all */
set_trap_gate(5, &bounds);
set_trap_gate(6, &invalid_op);
set_trap_gate(7, &device_not_available);
set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
set_trap_gate(9, &coprocessor_segment_overrun);
set_trap_gate(10, &invalid_TSS);
set_trap_gate(11, &segment_not_present);
set_trap_gate(12, &stack_segment);
Expand Down
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