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90 lines
2.6 KiB
ArmAsm
90 lines
2.6 KiB
ArmAsm
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// base::mac::CallWithEHFrame(void () block_pointer)
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#define CALL_WITH_EH_FRAME __ZN4base3mac15CallWithEHFrameEU13block_pointerFvvE
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.section __TEXT,__text,regular,pure_instructions
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#if !defined(COMPONENT_BUILD)
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.private_extern CALL_WITH_EH_FRAME
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#endif
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.globl CALL_WITH_EH_FRAME
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.align 4
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CALL_WITH_EH_FRAME:
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.cfi_startproc
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// Configure the C++ exception handler personality routine. Normally the
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// compiler would emit ___gxx_personality_v0 here. The purpose of this
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// function is to use a custom personality routine.
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.cfi_personality 155, __ZN4base3mac21CxxPersonalityRoutineEi14_Unwind_ActionyP17_Unwind_ExceptionP15_Unwind_Context
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.cfi_lsda 16, CallWithEHFrame_exception_table
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Lfunction_start:
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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// Load the function pointer from the block descriptor.
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movq 16(%rdi), %rax
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// Execute the block in the context of a C++ try{}.
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Ltry_start:
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callq *%rax
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Ltry_end:
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popq %rbp
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ret
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// Landing pad for the exception handler. This should never be called, since
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// the personality routine will stop the search for an exception handler,
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// which will cause the runtime to invoke the default terminate handler.
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Lcatch:
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movq %rax, %rdi
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callq ___cxa_begin_catch // The ABI requires a call to the catch handler.
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ud2 // In the event this is called, make it fatal.
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Lfunction_end:
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.cfi_endproc
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// The C++ exception table that is used to identify this frame as an
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// exception handler. See http://llvm.org/docs/ExceptionHandling.html and
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// http://mentorembedded.github.io/cxx-abi/exceptions.pdf.
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.section __TEXT,__gcc_except_tab
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.align 2
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CallWithEHFrame_exception_table:
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.byte 255 // DW_EH_PE_omit
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.byte 155 // DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4
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.asciz "\242\200\200" // LE int128 for the number of bytes in this table.
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.byte 3 // DW_EH_PE_udata4
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.byte 26 // Callsite table length.
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// First callsite.
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CS1_begin = Ltry_start - Lfunction_start
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.long CS1_begin
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CS1_end = Ltry_end - Ltry_start
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.long CS1_end
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// First landing pad.
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LP1 = Lcatch - Lfunction_start
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.long LP1
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.byte 1 // Action record.
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// Second callsite.
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CS2_begin = Ltry_end - Lfunction_start
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.long CS2_begin
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CS2_end = Lfunction_end - Ltry_end
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.long CS2_end
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// Second landing pad (none).
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.long 0
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.byte 0 // No action.
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// Action table.
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.byte 1 // Action record 1.
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.byte 0 // No further action to take.
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.long 0 // No type filter for this catch(){} clause.
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.align 2
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