From: Peter Zijlstra Date: Tue, 13 Nov 2007 07:46:02 +0000 (+0100) Subject: i386: fixup TRACE_IRQ breakage X-Git-Tag: v2.6.16.58-rc1~12 X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=commitdiff_plain;h=9c78b87bdfc519a9b73300c288a70cd4ee9f79c3;hp=08cdcb569ebc93e60861931f113e59814d0f8ef7 i386: fixup TRACE_IRQ breakage The TRACE_IRQS_ON function in iret_exc: calls a C function without ensuring that the segments are set properly. Move the trace function and the enabling of interrupt into the C stub. Signed-off-by: Peter Zijlstra Signed-off-by: Adrian Bunk --- diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S index a14218c9ec6c..cff11311e74c 100644 --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -261,7 +261,6 @@ restore_nocheck: 1: iret .section .fixup,"ax" iret_exc: - sti pushl $0 # no error code pushl $do_iret_error jmp error_code diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c index b814dbdcc91e..183e4b323a57 100644 --- a/arch/i386/kernel/traps.c +++ b/arch/i386/kernel/traps.c @@ -441,10 +441,12 @@ fastcall void do_##name(struct pt_regs * regs, long error_code) \ do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \ } -#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \ +#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \ fastcall 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; \ @@ -484,13 +486,13 @@ 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->eip) +DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip, 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_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0) -DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0) +DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0) +DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1) fastcall void __kprobes do_general_protection(struct pt_regs * regs, long error_code)