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Diffstat (limited to 'arch/x86/kernel/traps.c')
-rw-r--r--arch/x86/kernel/traps.c134
1 files changed, 70 insertions, 64 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index ec61d4c1b93..ff9281f1602 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -50,7 +50,6 @@
#include <asm/processor.h>
#include <asm/debugreg.h>
#include <linux/atomic.h>
-#include <asm/system.h>
#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/i387.h>
@@ -120,7 +119,7 @@ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
* traps 0, 1, 3, 4, and 5 should be forwarded to vm86.
* On nmi (interrupt 2), do_trap should not be called.
*/
- if (trapnr < 6)
+ if (trapnr < X86_TRAP_UD)
goto vm86_trap;
goto trap_signal;
}
@@ -133,7 +132,7 @@ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
trap_signal:
#endif
/*
- * We want error_code and trap_no set for userspace faults and
+ * We want error_code and trap_nr set for userspace faults and
* kernelspace faults which result in die(), but not
* kernelspace faults which are fixed up. die() gives the
* process no chance to handle the signal and notice the
@@ -142,7 +141,7 @@ trap_signal:
* delivered, faults. See also do_general_protection below.
*/
tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
+ tsk->thread.trap_nr = trapnr;
#ifdef CONFIG_X86_64
if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
@@ -165,7 +164,7 @@ trap_signal:
kernel_trap:
if (!fixup_exception(regs)) {
tsk->thread.error_code = error_code;
- tsk->thread.trap_no = trapnr;
+ tsk->thread.trap_nr = trapnr;
die(str, regs, error_code);
}
return;
@@ -204,27 +203,31 @@ dotraplinkage void do_##name(struct pt_regs *regs, long error_code) \
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(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+DO_ERROR_INFO(X86_TRAP_DE, SIGFPE, "divide error", divide_error, FPE_INTDIV,
+ regs->ip)
+DO_ERROR(X86_TRAP_OF, SIGSEGV, "overflow", overflow)
+DO_ERROR(X86_TRAP_BR, SIGSEGV, "bounds", bounds)
+DO_ERROR_INFO(X86_TRAP_UD, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN,
+ regs->ip)
+DO_ERROR(X86_TRAP_OLD_MF, SIGFPE, "coprocessor segment overrun",
+ coprocessor_segment_overrun)
+DO_ERROR(X86_TRAP_TS, SIGSEGV, "invalid TSS", invalid_TSS)
+DO_ERROR(X86_TRAP_NP, SIGBUS, "segment not present", segment_not_present)
#ifdef CONFIG_X86_32
-DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
+DO_ERROR(X86_TRAP_SS, SIGBUS, "stack segment", stack_segment)
#endif
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+DO_ERROR_INFO(X86_TRAP_AC, SIGBUS, "alignment check", alignment_check,
+ BUS_ADRALN, 0)
#ifdef CONFIG_X86_64
/* Runs on IST stack */
dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code)
{
if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
- 12, SIGBUS) == NOTIFY_STOP)
+ X86_TRAP_SS, SIGBUS) == NOTIFY_STOP)
return;
preempt_conditional_sti(regs);
- do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
+ do_trap(X86_TRAP_SS, SIGBUS, "stack segment", regs, error_code, NULL);
preempt_conditional_cli(regs);
}
@@ -234,10 +237,10 @@ dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
struct task_struct *tsk = current;
/* Return not checked because double check cannot be ignored */
- notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
+ notify_die(DIE_TRAP, str, regs, error_code, X86_TRAP_DF, SIGSEGV);
tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 8;
+ tsk->thread.trap_nr = X86_TRAP_DF;
/*
* This is always a kernel trap and never fixable (and thus must
@@ -265,7 +268,7 @@ do_general_protection(struct pt_regs *regs, long error_code)
goto gp_in_kernel;
tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
+ tsk->thread.trap_nr = X86_TRAP_GP;
if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
printk_ratelimit()) {
@@ -292,9 +295,9 @@ gp_in_kernel:
return;
tsk->thread.error_code = error_code;
- tsk->thread.trap_no = 13;
- if (notify_die(DIE_GPF, "general protection fault", regs,
- error_code, 13, SIGSEGV) == NOTIFY_STOP)
+ tsk->thread.trap_nr = X86_TRAP_GP;
+ if (notify_die(DIE_GPF, "general protection fault", regs, error_code,
+ X86_TRAP_GP, SIGSEGV) == NOTIFY_STOP)
return;
die("general protection fault", regs, error_code);
}
@@ -303,13 +306,13 @@ gp_in_kernel:
dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
#ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
- if (kgdb_ll_trap(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
- == NOTIFY_STOP)
+ if (kgdb_ll_trap(DIE_INT3, "int3", regs, error_code, X86_TRAP_BP,
+ SIGTRAP) == NOTIFY_STOP)
return;
#endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */
- if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
- == NOTIFY_STOP)
+ if (notify_die(DIE_INT3, "int3", regs, error_code, X86_TRAP_BP,
+ SIGTRAP) == NOTIFY_STOP)
return;
/*
@@ -318,7 +321,7 @@ dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
*/
debug_stack_usage_inc();
preempt_conditional_sti(regs);
- do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
+ do_trap(X86_TRAP_BP, SIGTRAP, "int3", regs, error_code, NULL);
preempt_conditional_cli(regs);
debug_stack_usage_dec();
}
@@ -423,8 +426,8 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
preempt_conditional_sti(regs);
if (regs->flags & X86_VM_MASK) {
- handle_vm86_trap((struct kernel_vm86_regs *) regs,
- error_code, 1);
+ handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code,
+ X86_TRAP_DB);
preempt_conditional_cli(regs);
debug_stack_usage_dec();
return;
@@ -461,7 +464,8 @@ void math_error(struct pt_regs *regs, int error_code, int trapnr)
struct task_struct *task = current;
siginfo_t info;
unsigned short err;
- char *str = (trapnr == 16) ? "fpu exception" : "simd exception";
+ char *str = (trapnr == X86_TRAP_MF) ? "fpu exception" :
+ "simd exception";
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, SIGFPE) == NOTIFY_STOP)
return;
@@ -471,7 +475,7 @@ void math_error(struct pt_regs *regs, int error_code, int trapnr)
{
if (!fixup_exception(regs)) {
task->thread.error_code = error_code;
- task->thread.trap_no = trapnr;
+ task->thread.trap_nr = trapnr;
die(str, regs, error_code);
}
return;
@@ -481,12 +485,12 @@ void math_error(struct pt_regs *regs, int error_code, int trapnr)
* Save the info for the exception handler and clear the error.
*/
save_init_fpu(task);
- task->thread.trap_no = trapnr;
+ task->thread.trap_nr = trapnr;
task->thread.error_code = error_code;
info.si_signo = SIGFPE;
info.si_errno = 0;
info.si_addr = (void __user *)regs->ip;
- if (trapnr == 16) {
+ if (trapnr == X86_TRAP_MF) {
unsigned short cwd, swd;
/*
* (~cwd & swd) will mask out exceptions that are not set to unmasked
@@ -530,10 +534,11 @@ void math_error(struct pt_regs *regs, int error_code, int trapnr)
info.si_code = FPE_FLTRES;
} else {
/*
- * If we're using IRQ 13, or supposedly even some trap 16
- * implementations, it's possible we get a spurious trap...
+ * If we're using IRQ 13, or supposedly even some trap
+ * X86_TRAP_MF implementations, it's possible
+ * we get a spurious trap, which is not an error.
*/
- return; /* Spurious trap, no error */
+ return;
}
force_sig_info(SIGFPE, &info, task);
}
@@ -544,13 +549,13 @@ dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
ignore_fpu_irq = 1;
#endif
- math_error(regs, error_code, 16);
+ math_error(regs, error_code, X86_TRAP_MF);
}
dotraplinkage void
do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
{
- math_error(regs, error_code, 19);
+ math_error(regs, error_code, X86_TRAP_XF);
}
dotraplinkage void
@@ -644,20 +649,21 @@ dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
info.si_errno = 0;
info.si_code = ILL_BADSTK;
info.si_addr = NULL;
- if (notify_die(DIE_TRAP, "iret exception",
- regs, error_code, 32, SIGILL) == NOTIFY_STOP)
+ if (notify_die(DIE_TRAP, "iret exception", regs, error_code,
+ X86_TRAP_IRET, SIGILL) == NOTIFY_STOP)
return;
- do_trap(32, SIGILL, "iret exception", regs, error_code, &info);
+ do_trap(X86_TRAP_IRET, SIGILL, "iret exception", regs, error_code,
+ &info);
}
#endif
/* Set of traps needed for early debugging. */
void __init early_trap_init(void)
{
- set_intr_gate_ist(1, &debug, DEBUG_STACK);
+ set_intr_gate_ist(X86_TRAP_DB, &debug, DEBUG_STACK);
/* int3 can be called from all */
- set_system_intr_gate_ist(3, &int3, DEBUG_STACK);
- set_intr_gate(14, &page_fault);
+ set_system_intr_gate_ist(X86_TRAP_BP, &int3, DEBUG_STACK);
+ set_intr_gate(X86_TRAP_PF, &page_fault);
load_idt(&idt_descr);
}
@@ -673,30 +679,30 @@ void __init trap_init(void)
early_iounmap(p, 4);
#endif
- set_intr_gate(0, &divide_error);
- set_intr_gate_ist(2, &nmi, NMI_STACK);
+ set_intr_gate(X86_TRAP_DE, &divide_error);
+ set_intr_gate_ist(X86_TRAP_NMI, &nmi, NMI_STACK);
/* int4 can be called from all */
- set_system_intr_gate(4, &overflow);
- set_intr_gate(5, &bounds);
- set_intr_gate(6, &invalid_op);
- set_intr_gate(7, &device_not_available);
+ set_system_intr_gate(X86_TRAP_OF, &overflow);
+ set_intr_gate(X86_TRAP_BR, &bounds);
+ set_intr_gate(X86_TRAP_UD, &invalid_op);
+ set_intr_gate(X86_TRAP_NM, &device_not_available);
#ifdef CONFIG_X86_32
- set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
+ set_task_gate(X86_TRAP_DF, GDT_ENTRY_DOUBLEFAULT_TSS);
#else
- set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
+ set_intr_gate_ist(X86_TRAP_DF, &double_fault, DOUBLEFAULT_STACK);
#endif
- 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(15, &spurious_interrupt_bug);
- set_intr_gate(16, &coprocessor_error);
- set_intr_gate(17, &alignment_check);
+ set_intr_gate(X86_TRAP_OLD_MF, &coprocessor_segment_overrun);
+ set_intr_gate(X86_TRAP_TS, &invalid_TSS);
+ set_intr_gate(X86_TRAP_NP, &segment_not_present);
+ set_intr_gate_ist(X86_TRAP_SS, &stack_segment, STACKFAULT_STACK);
+ set_intr_gate(X86_TRAP_GP, &general_protection);
+ set_intr_gate(X86_TRAP_SPURIOUS, &spurious_interrupt_bug);
+ set_intr_gate(X86_TRAP_MF, &coprocessor_error);
+ set_intr_gate(X86_TRAP_AC, &alignment_check);
#ifdef CONFIG_X86_MCE
- set_intr_gate_ist(18, &machine_check, MCE_STACK);
+ set_intr_gate_ist(X86_TRAP_MC, &machine_check, MCE_STACK);
#endif
- set_intr_gate(19, &simd_coprocessor_error);
+ set_intr_gate(X86_TRAP_XF, &simd_coprocessor_error);
/* Reserve all the builtin and the syscall vector: */
for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
@@ -721,7 +727,7 @@ void __init trap_init(void)
#ifdef CONFIG_X86_64
memcpy(&nmi_idt_table, &idt_table, IDT_ENTRIES * 16);
- set_nmi_gate(1, &debug);
- set_nmi_gate(3, &int3);
+ set_nmi_gate(X86_TRAP_DB, &debug);
+ set_nmi_gate(X86_TRAP_BP, &int3);
#endif
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 12:40:08 +0000