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13.20.5 Macros for SDB and DWARF Output

Here are macros for SDB and DWARF output.

— Macro: SDB_DEBUGGING_INFO

Define this macro if GCC should produce COFF-style debugging output for SDB in response to the -g option.

— Macro: DWARF2_DEBUGGING_INFO

Define this macro if GCC should produce dwarf version 2 format debugging output in response to the -g option.

— Target Hook: int TARGET_DWARF_CALLING_CONVENTION (tree function)

Define this to enable the dwarf attribute DW_AT_calling_convention to be emitted for each function. Instead of an integer return the enum value for the DW_CC_ tag.

To support optional call frame debugging information, you must also define INCOMING_RETURN_ADDR_RTX and either set RTX_FRAME_RELATED_P on the prologue insns if you use RTL for the prologue, or call dwarf2out_def_cfa and dwarf2out_reg_save as appropriate from TARGET_ASM_FUNCTION_PROLOGUE if you don't.

— Macro: DWARF2_FRAME_INFO

Define this macro to a nonzero value if GCC should always output Dwarf 2 frame information. If DWARF2_UNWIND_INFO (see Exception Region Output is nonzero, GCC will output this information not matter how you define DWARF2_FRAME_INFO.

— Macro: DWARF2_ASM_LINE_DEBUG_INFO

Define this macro to be a nonzero value if the assembler can generate Dwarf 2 line debug info sections. This will result in much more compact line number tables, and hence is desirable if it works.

— Macro: ASM_OUTPUT_DWARF_DELTA (stream, size, label1, label2)

A C statement to issue assembly directives that create a difference between the two given labels, using an integer of the given size.

— Macro: ASM_OUTPUT_DWARF_OFFSET (stream, size, label)

A C statement to issue assembly directives that create a section-relative reference to the given label, using an integer of the given size.

— Macro: ASM_OUTPUT_DWARF_PCREL (stream, size, label)

A C statement to issue assembly directives that create a self-relative reference to the given label, using an integer of the given size.

— Macro: PUT_SDB_...

Define these macros to override the assembler syntax for the special SDB assembler directives. See sdbout.c for a list of these macros and their arguments. If the standard syntax is used, you need not define them yourself.

— Macro: SDB_DELIM

Some assemblers do not support a semicolon as a delimiter, even between SDB assembler directives. In that case, define this macro to be the delimiter to use (usually `\n'). It is not necessary to define a new set of PUT_SDB_op macros if this is the only change required.

— Macro: SDB_ALLOW_UNKNOWN_REFERENCES

Define this macro to allow references to unknown structure, union, or enumeration tags to be emitted. Standard COFF does not allow handling of unknown references, MIPS ECOFF has support for it.

— Macro: SDB_ALLOW_FORWARD_REFERENCES

Define this macro to allow references to structure, union, or enumeration tags that have not yet been seen to be handled. Some assemblers choke if forward tags are used, while some require it.

— Macro: SDB_OUTPUT_SOURCE_LINE (stream, line)

A C statement to output SDB debugging information before code for line number line of the current source file to the stdio stream stream. The default is to emit an .ln directive.