Merge pull request #763 from douglas-raillard-arm/dr/add_debug_frame_info
Add CFI debug frame information for ASM functions
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commit
2fa94890ae
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@ -33,12 +33,30 @@
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/*
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/*
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* This macro is used to create a function label and place the
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* This macro is used to create a function label and place the
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* code into a separate text section based on the function name
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* code into a separate text section based on the function name
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* to enable elimination of unused code during linking
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* to enable elimination of unused code during linking. It also adds
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* basic debug information to enable call stack printing most of the
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* time.
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*/
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*/
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.macro func _name
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.macro func _name
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/*
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* Add Call Frame Information entry in the .debug_frame section for
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* debugger consumption. This enables callstack printing in debuggers.
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* This does not use any space in the final loaded binary, only in the
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* ELF file.
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* Note that a function manipulating the CFA pointer location (i.e. the
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* x29 frame pointer on AArch64) should declare it using the
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* appropriate .cfi* directives, or be prepared to have a degraded
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* debugging experience.
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*/
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.cfi_sections .debug_frame
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.section .text.\_name, "ax"
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.section .text.\_name, "ax"
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.type \_name, %function
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.type \_name, %function
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.func \_name
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.func \_name
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/*
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* .cfi_startproc and .cfi_endproc are needed to output entries in
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* .debug_frame
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*/
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.cfi_startproc
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\_name:
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\_name:
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.endm
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.endm
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@ -47,6 +65,7 @@
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*/
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*/
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.macro endfunc _name
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.macro endfunc _name
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.endfunc
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.endfunc
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.cfi_endproc
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.size \_name, . - \_name
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.size \_name, . - \_name
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.endm
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.endm
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