Commit 61aef7d2 authored by Alexander van Heukelum's avatar Alexander van Heukelum Committed by Ingo Molnar

i386: prepare to convert exceptions to interrupts

There is some macro magic in traps_32.c to construct standard
exception dispatch functions. This patch renames the DO_ERROR-
like macros to DO_TRAP, and introduces new DO_ERROR ones that
conditionally reenable interrupts explicitly, like x86_64.

No code changes.
Signed-off-by: default avatarAlexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 762db434
...@@ -528,6 +528,56 @@ do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs, ...@@ -528,6 +528,56 @@ do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs,
return; return;
} }
#define DO_TRAP(trapnr, signr, str, name) \
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) \
return; \
do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
}
#define DO_TRAP_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
void do_##name(struct pt_regs *regs, long error_code) \
{ \
siginfo_t info; \
if (irq) \
local_irq_enable(); \
info.si_signo = signr; \
info.si_errno = 0; \
info.si_code = sicode; \
info.si_addr = (void __user *)siaddr; \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
}
#define DO_VM86_TRAP(trapnr, signr, str, name) \
void do_##name(struct pt_regs *regs, long error_code) \
{ \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \
return; \
do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
}
#define DO_VM86_TRAP_INFO(trapnr, signr, str, name, sicode, siaddr) \
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; \
do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
}
#define DO_ERROR(trapnr, signr, str, name) \ #define DO_ERROR(trapnr, signr, str, name) \
void do_##name(struct pt_regs *regs, long error_code) \ void do_##name(struct pt_regs *regs, long error_code) \
{ \ { \
...@@ -535,6 +585,7 @@ void do_##name(struct pt_regs *regs, long error_code) \ ...@@ -535,6 +585,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \ == NOTIFY_STOP) \
return; \ return; \
conditional_sti(regs); \
do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \ do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
} }
...@@ -551,6 +602,7 @@ void do_##name(struct pt_regs *regs, long error_code) \ ...@@ -551,6 +602,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \ == NOTIFY_STOP) \
return; \ return; \
conditional_sti(regs); \
do_trap(trapnr, signr, str, 0, regs, error_code, &info); \ do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
} }
...@@ -560,6 +612,7 @@ void do_##name(struct pt_regs *regs, long error_code) \ ...@@ -560,6 +612,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \ == NOTIFY_STOP) \
return; \ return; \
conditional_sti(regs); \
do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \ do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
} }
...@@ -575,22 +628,23 @@ void do_##name(struct pt_regs *regs, long error_code) \ ...@@ -575,22 +628,23 @@ void do_##name(struct pt_regs *regs, long error_code) \
if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
== NOTIFY_STOP) \ == NOTIFY_STOP) \
return; \ return; \
conditional_sti(regs); \
do_trap(trapnr, signr, str, 1, regs, error_code, &info); \ 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_TRAP_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
#ifndef CONFIG_KPROBES #ifndef CONFIG_KPROBES
DO_VM86_ERROR(3, SIGTRAP, "int3", int3) DO_VM86_TRAP(3, SIGTRAP, "int3", int3)
#endif #endif
DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow) DO_VM86_TRAP(4, SIGSEGV, "overflow", overflow)
DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds) DO_VM86_TRAP(5, SIGSEGV, "bounds", bounds)
DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0) DO_TRAP_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun) DO_TRAP(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS) DO_TRAP(10, SIGSEGV, "invalid TSS", invalid_TSS)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present) DO_TRAP(11, SIGBUS, "segment not present", segment_not_present)
DO_ERROR(12, SIGBUS, "stack segment", stack_segment) DO_TRAP(12, SIGBUS, "stack segment", stack_segment)
DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0) DO_TRAP_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1) DO_TRAP_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
void __kprobes void __kprobes
do_general_protection(struct pt_regs *regs, long error_code) do_general_protection(struct pt_regs *regs, long error_code)
......
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