?? asm.s
字號:
/* * linux/kernel/asm.s * * (C) 1991 Linus Torvalds *//* * asm.s contains the low-level code for most hardware faults. * page_exception is handled by the mm, so that isn't here. This * file also handles (hopefully) fpu-exceptions due to TS-bit, as * the fpu must be properly saved/resored. This hasn't been tested. */.globl _divide_error,_debug,_nmi,_int3,_overflow,_bounds,_invalid_op.globl _double_fault,_coprocessor_segment_overrun.globl _invalid_TSS,_segment_not_present,_stack_segment.globl _general_protection,_coprocessor_error,_irq13,_reserved_divide_error: pushl $_do_divide_errorno_error_code: xchgl %eax,(%esp) pushl %ebx pushl %ecx pushl %edx pushl %edi pushl %esi pushl %ebp push %ds push %es push %fs pushl $0 # "error code" lea 44(%esp),%edx pushl %edx movl $0x10,%edx mov %dx,%ds mov %dx,%es mov %dx,%fs call *%eax addl $8,%esp pop %fs pop %es pop %ds popl %ebp popl %esi popl %edi popl %edx popl %ecx popl %ebx popl %eax iret_debug: pushl $_do_int3 # _do_debug jmp no_error_code_nmi: pushl $_do_nmi jmp no_error_code_int3: pushl $_do_int3 jmp no_error_code_overflow: pushl $_do_overflow jmp no_error_code_bounds: pushl $_do_bounds jmp no_error_code_invalid_op: pushl $_do_invalid_op jmp no_error_code_coprocessor_segment_overrun: pushl $_do_coprocessor_segment_overrun jmp no_error_code_reserved: pushl $_do_reserved jmp no_error_code_irq13: pushl %eax xorb %al,%al outb %al,$0xF0 movb $0x20,%al outb %al,$0x20 jmp 1f1: jmp 1f1: outb %al,$0xA0 popl %eax jmp _coprocessor_error_double_fault: pushl $_do_double_faulterror_code: xchgl %eax,4(%esp) # error code <-> %eax xchgl %ebx,(%esp) # &function <-> %ebx pushl %ecx pushl %edx pushl %edi pushl %esi pushl %ebp push %ds push %es push %fs pushl %eax # error code lea 44(%esp),%eax # offset pushl %eax movl $0x10,%eax mov %ax,%ds mov %ax,%es mov %ax,%fs call *%ebx addl $8,%esp pop %fs pop %es pop %ds popl %ebp popl %esi popl %edi popl %edx popl %ecx popl %ebx popl %eax iret_invalid_TSS: pushl $_do_invalid_TSS jmp error_code_segment_not_present: pushl $_do_segment_not_present jmp error_code_stack_segment: pushl $_do_stack_segment jmp error_code_general_protection: pushl $_do_general_protection jmp error_code
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