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i386: convert hardware exception 4 to an interrupt gate

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Handle overflow exception with interrupt initially off.

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 2008-09-09 21:55:59 +02:00 committed by Ingo Molnar
parent b94da1e4b7
commit 8d6f9d69bd
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kernel/traps_32.c
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@ -633,7 +633,7 @@ void do_##name(struct pt_regs *regs, long error_code) \
} }
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)
DO_VM86_TRAP(4, SIGSEGV, "overflow", overflow) DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
DO_VM86_TRAP(5, SIGSEGV, "bounds", bounds) DO_VM86_TRAP(5, SIGSEGV, "bounds", bounds)
DO_TRAP_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_TRAP(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun) DO_TRAP(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
@ -1252,7 +1252,7 @@ void __init trap_init(void)
set_intr_gate(1, &debug); set_intr_gate(1, &debug);
set_intr_gate(2, &nmi); set_intr_gate(2, &nmi);
set_system_intr_gate(3, &int3); /* int3 can be called from all */ set_system_intr_gate(3, &int3); /* int3 can be called from all */
set_system_gate(4, &overflow); /* int4 can be called from all */ set_system_intr_gate(4, &overflow); /* int4 can be called from all */
set_trap_gate(5, &bounds); set_trap_gate(5, &bounds);
set_trap_gate(6, &invalid_op); set_trap_gate(6, &invalid_op);
set_trap_gate(7, &device_not_available); set_trap_gate(7, &device_not_available);