29faeb9632
Add the infrastructure needed to enable exception handling in selftests. This allows any of the exception and interrupt vectors to be overridden in the guest. Signed-off-by: Aaron Lewis <aaronlewis@google.com> Reviewed-by: Alexander Graf <graf@amazon.com> Message-Id: <20201012194716.3950330-4-aaronlewis@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
82 lines
1.3 KiB
ArmAsm
82 lines
1.3 KiB
ArmAsm
handle_exception:
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push %r15
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push %r14
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push %r13
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push %r12
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push %r11
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push %r10
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push %r9
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push %r8
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push %rdi
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push %rsi
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push %rbp
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push %rbx
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push %rdx
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push %rcx
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push %rax
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mov %rsp, %rdi
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call route_exception
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pop %rax
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pop %rcx
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pop %rdx
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pop %rbx
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pop %rbp
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pop %rsi
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pop %rdi
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pop %r8
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pop %r9
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pop %r10
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pop %r11
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pop %r12
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pop %r13
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pop %r14
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pop %r15
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/* Discard vector and error code. */
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add $16, %rsp
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iretq
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/*
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* Build the handle_exception wrappers which push the vector/error code on the
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* stack and an array of pointers to those wrappers.
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*/
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.pushsection .rodata
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.globl idt_handlers
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idt_handlers:
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.popsection
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.macro HANDLERS has_error from to
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vector = \from
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.rept \to - \from + 1
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.align 8
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/* Fetch current address and append it to idt_handlers. */
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current_handler = .
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.pushsection .rodata
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.quad current_handler
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.popsection
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.if ! \has_error
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pushq $0
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.endif
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pushq $vector
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jmp handle_exception
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vector = vector + 1
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.endr
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.endm
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.global idt_handler_code
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idt_handler_code:
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HANDLERS has_error=0 from=0 to=7
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HANDLERS has_error=1 from=8 to=8
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HANDLERS has_error=0 from=9 to=9
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HANDLERS has_error=1 from=10 to=14
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HANDLERS has_error=0 from=15 to=16
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HANDLERS has_error=1 from=17 to=17
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HANDLERS has_error=0 from=18 to=255
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.section .note.GNU-stack, "", %progbits
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