gcc: Blackfin Function Attributes
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1 6.31.6 Blackfin Function Attributes
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1 These function attributes are supported by the Blackfin back end:
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1 'exception_handler'
1 Use this attribute on the Blackfin to indicate that the specified
1 function is an exception handler. The compiler generates function
1 entry and exit sequences suitable for use in an exception handler
1 when this attribute is present.
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1 'interrupt_handler'
1 Use this attribute to indicate that the specified function is an
1 interrupt handler. The compiler generates function entry and exit
1 sequences suitable for use in an interrupt handler when this
1 attribute is present.
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1 'kspisusp'
1 When used together with 'interrupt_handler', 'exception_handler' or
1 'nmi_handler', code is generated to load the stack pointer from the
1 USP register in the function prologue.
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1 'l1_text'
1 This attribute specifies a function to be placed into L1
1 Instruction SRAM. The function is put into a specific section
1 named '.l1.text'. With '-mfdpic', function calls with a such
1 function as the callee or caller uses inlined PLT.
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1 'l2'
1 This attribute specifies a function to be placed into L2 SRAM. The
1 function is put into a specific section named '.l2.text'. With
1 '-mfdpic', callers of such functions use an inlined PLT.
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1 'longcall'
1 'shortcall'
1 The 'longcall' attribute indicates that the function might be far
1 away from the call site and require a different (more expensive)
1 calling sequence. The 'shortcall' attribute indicates that the
1 function is always close enough for the shorter calling sequence to
1 be used. These attributes override the '-mlongcall' switch.
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1 'nesting'
1 Use this attribute together with 'interrupt_handler',
1 'exception_handler' or 'nmi_handler' to indicate that the function
1 entry code should enable nested interrupts or exceptions.
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1 'nmi_handler'
1 Use this attribute on the Blackfin to indicate that the specified
1 function is an NMI handler. The compiler generates function entry
1 and exit sequences suitable for use in an NMI handler when this
1 attribute is present.
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1 'saveall'
1 Use this attribute to indicate that all registers except the stack
1 pointer should be saved in the prologue regardless of whether they
1 are used or not.
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